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Jtekt Corporation patents (2016 archive)


Recent patent applications related to Jtekt Corporation. Jtekt Corporation is listed as an Agent/Assignee. Note: Jtekt Corporation may have other listings under different names/spellings. We're not affiliated with Jtekt Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "J" | Jtekt Corporation-related inventors


Manufacturing method for magnet and magnet

A manufacturing method for a magnet includes: a step of obtaining mixed powder of magnetic powder and a lubricant; a step of mixing the mixed powder with an uncured binder that is a silicone composition to attach the binder to a surface of the mixed powder; a step of molding the mixed powder under pressure to obtain a molding, and a step of curing the silicone composition to bind particles of the magnetic powder together,. . ... Jtekt Corporation

Vehicular steering system

A vehicular steering system includes a driving wheel, a wheel drive actuator that rotationally drives the driving wheel, a steering operation mechanism that steers the driving wheel, a steering operation actuator that applies a steering operation force that is used to steer the driving wheel to the steering operation mechanism, and a hydraulic circuit that transmits the rotational driving force of the wheel drive actuator to the steering operation mechanism via hydraulic oil as a steering operation force.. . ... Jtekt Corporation

Manufacturing method for magnet and magnet

A manufacturing method for a magnet has step of molding magnetic powder under pressure to obtain a molding. The magnetic powder is pressurized using a mold to which a release agent is applied. ... Jtekt Corporation

Sliding constant-velocity joint

A sliding constant-velocity joint includes: an outer ring, in the inner surface of which a plurality of raceway grooves are formed; a tripod member that transfers torque between the outer ring and a shaft; an intermediate member that swingably supports a tripod shaft portion of the tripod member; a plurality of rolling elements that can roll along the outer surface of the intermediate member; and a cage that holds the rolling elements. The amount of movement of the intermediate member in a radial direction of the outer ring is restrained such that the intermediate member does not contact a neck portion of the tripod shaft portion or a boss portion because of tilt motion of the intermediate member caused along with swing motion of the tripod shaft portion during rotation of the outer ring and the shaft.. ... Jtekt Corporation

Sliding constant velocity joint

A sliding constant velocity joint 1 includes: an outer ring serving as an outer member; a tripod member serving as an inner member; an intermediate member that is formed by a pair of divided members placed so as to be separated from each other with a head of a tripod shaft portion interposed therebetween; a plurality of rolling elements that roll on first and second raceway surfaces of the outer ring; and a cage holding the plurality of rolling elements. When the rolling elements are pressed by the pair of divided members and the bodies of the rolling elements are brought into contact with the pair of raceway surfaces, there is predetermined clearance between an outer peripheral surface of a needle-like projection of each rolling element and outer side surfaces in first and second grooves.. ... Jtekt Corporation

Electric power steering system

In an electric power steering system, a low-pass filter executes a low-pass filtering process on a detected steering torque value detected by a torque sensor. A steering torque deviation computing unit computes a deviation Δt between a detected steering torque value t* obtained through the low-pass filtering process and the detected steering torque value detected by the torque sensor. ... Jtekt Corporation

Steering system

A steering system includes: a steering shaft to which a steering member is coupled; a worm wheel attached to the steering shaft so as to be rotatable integrally with the steering shaft; a housing that houses the worm wheel; an output shaft that is coaxial with the steering shaft and rotatable relative to the steering shaft and coupled to a steering operation mechanism; and a clutch mechanism that enables and disables transmission of power between the steering shaft and the output shaft. The clutch mechanism is housed and disposed in an internal space in the housing. ... Jtekt Corporation

Steering system

A steering system includes: a steering shaft to which a steering member is coupled; a worm wheel attached to the steering shaft so as to be rotatable integrally with the steering shaft; a housing that houses the worm wheel; an output shaft that is coaxial with the steering shaft and rotatable relative to the steering shaft and coupled to a steering operation mechanism; and a clutch mechanism that enables and disables transmission of power between the steering shaft and the output shaft. The clutch mechanism is housed and disposed in an internal space in the housing.. ... Jtekt Corporation

Electromagnetic clutch device

. . An electromagnetic clutch device includes meshing member connected to a first rotational member, a biasing member that biases the meshing member in a direction where a second meshing portion is meshed with a first meshing portion, and a pressing mechanism including a locking portion that presses the meshing member against a biasing force of the biasing member so as to axially move the meshing member. The locking portion is axially immovable relative to the second rotational member, and a cylindrical cam member is provided with a plurality of locked portions to be locked at different axial positions. ... Jtekt Corporation

Grinding machine

A grinding machine includes a manual rotating handle provided with a rotation detector that outputs a rotation detection signal so that the position of a grinding wheel with respect to a workpiece can be relatively moved in accordance with the rotation detection signal. The grinding machine further includes a grinding wheel, a moving apparatus that moves the position of the grinding wheel with respect to a workpiece w, a proximity detector that outputs a proximity detection signal corresponding to a relative position or a relative distance between the workpiece and the grinding wheel, a manual rotating handle provided with a rotation detector, and a control apparatus that controls the moving apparatus based on the rotation detection signal. ... Jtekt Corporation

Manufacturing method and magnetizing device for interior permanent magnet rotor unit

In a method for manufacturing an interior permanent magnet rotor unit, a radial magnetizing part including high magnetic permeability portions and low magnetic permeability portions face a core, and a magnetic field of axial magnetizing parts is applied to the radial magnetizing part in an axial direction of the radial magnetizing part. This causes the magnetic field to enter the core via the radial magnetizing part and cross magnet materials filling insertion holes of the core.. ... Jtekt Corporation

Constant-velocity joint

A constant-velocity joint includes: an outer joint member; an inner joint member that is placed in the outer joint member and that can be angled with respect to the outer joint member; and balls that roll between the outer joint member and the inner joint member to transmit torque. First outer larger diameter portions and second outer larger diameter portions are formed alternately in the circumferential direction in the inner peripheral surface of the outer joint member. ... Jtekt Corporation

Rolling bearing apparatus

A rolling bearing apparatus includes a bearing portion and a lubrication unit. The lubrication unit is provided adjacently to an annular space in an axial direction. ... Jtekt Corporation

Rolling bearing apparatus

A rolling bearing apparatus includes: a bearing portion having an inner ring, an outer ring, a plurality of balls, and a cage; and a lubrication unit that is provided adjacently to an annular space formed between the inner ring and the outer ring and that has a pump that feeds a lubricant into the annular space. The pump has a main body portion having an internal space in which the lubricant is retained and being open at one end of the main body portion, a metal diaphragm fixed to a fixation portion that is a part of the main body portion so as to close the opening of the main body portion, and a piezoelectric element fixed to the diaphragm. ... Jtekt Corporation

12/01/16 / #20160352190

Rotation angle detection device

A rotation angle detection device detects a rotation angle of a motor having a shaft passing through a heat-dissipation plate. The rotation angle detection device includes: a permanent magnet attached to a base end of the shaft; a board that is disposed above the heat-dissipation plate and on which a drive circuit of the motor and a control circuit of the drive circuit are mounted; a magnetic sensor that is provided on the board so as to face the permanent magnet; and a magnetic shielding member that has a tubular shape and is disposed between the heat-dissipation plate and the board to surround the permanent magnet in plan view.. ... Jtekt Corporation

12/01/16 / #20160351469

Semiconductor device

In a semiconductor device, a first to a sixth switching elements are joined to a second main surface of a substrate with their electrode surfaces facing the second main surface of the substrate. Non-electrode surfaces of the switching elements are provided with respective heat spreaders joined thereto. ... Jtekt Corporation

12/01/16 / #20160348737

Sliding member, clutch plate, and manufacturing methods for the same

In a manufacturing method for a sliding member, a nitrogen diffusion layer, a nitrogen compound layer, and an oxidation layer are formed by executing a first step of cooling a workpiece formed of a steel material after heating the workpiece in an atmosphere containing ammonia at 570 to 660° c., a second step of performing, subsequently to the first step, tempering while pressurizing a front surface side of the workpiece, and a third step of performing, subsequently to the second step, steam treatment of heating the workpiece in a steam atmosphere.. . ... Jtekt Corporation

12/01/16 / #20160348729

Method for assembling wheel bearing apparatus

A method for assembling a wheel bearing apparatus includes disposing a positioning jig such that a lateral face of the positioning jig on one side in an axial direction contacts a lateral face of a hub flange on a side of a slinger, the positioning jig having a ring shape separated into a plurality of partial portions arranged in a circumferential direction, a width of the positioning jig in the axial direction being equal to a distance between a lateral face of a disc portion on a side of the hub flange and a lateral face of the hub flange on the side of the slinger, the distance being set to obtain an appropriate interference; and attaching the slinger such that the lateral face of the disc portion on the side of the hub flange contacts a lateral face of the positioning jig on another side in the axial direction.. . ... Jtekt Corporation

12/01/16 / #20160347356

Steering apparatus

A steering apparatus is provided which can suppress unintended movement of a steering wheel when a clutch is engaged. When a power switch is turned off and a steering wheel is steered, a reaction force control circuit makes a reaction force motor to generate a steering reaction force stronger than a normal steering reaction force to give a driver an appropriate feeling of response according to a steering torque. ... Jtekt Corporation

12/01/16 / #20160347355

Steering assist device

In a steering assist device, a main lane keep assist current value setting unit sets a main lane keep assist current value that generates main lane keep assist torque according to a lateral deviation and a lateral deviation change rate. A sub lane keep assist current value setting unit sets a sub lane keep assist current value that generates sub lane keep assist torque according to curvature ct of a target travel line.. ... Jtekt Corporation

11/24/16 / #20160340603

Lubricating oil composition for differential gear unit

. . Provided is a lubricating oil composition for a differential gear unit that is effective in limiting the generation of noise and vibrations even when a limited-slip differential is operated. The lubricating oil composition contains (a) a mineral oil and/or (b) a synthetic oil and (c) a friction modifier selected from amide- and imide-based friction modifiers and derivatives thereof in an amount of 0.01 to 10 percent by mass on the basis of the total mass of the composition. ... Jtekt Corporation

11/24/16 / #20160339950

Vehicular control apparatus

A vehicular control apparatus that functions more reliably is provided. A quasi-abnormality control circuit brings one of a clock signal, an internal watchdog signal, and an answer signal into a quasi-abnormal state when an ignition is switched on. ... Jtekt Corporation

11/24/16 / #20160339944

Steering assist device

In a steering assist device, a lane keep assist current value calculation unit calculates, based on a lateral deviation and a lateral deviation change rate, a lane keep assist current value that makes the lateral deviation and the lateral deviation change rate closer to zero. When the steering direction represented by the sign of control steering torque is the same as the steered direction represented by the sign of the fourth lane keep assist current value, a switch unit selects zero received at its second input terminal and outputs zero as a final lane keep assist current value.. ... Jtekt Corporation

11/17/16 / #20160334981

Screen information generation device

A screen information generation device generates screen information indicating display content of a display device connected to a programmable controller that controls a control object device according to a chart program indicating execution order of a plurality of steps each provided per operation unit. When generating the screen information of an individual-manipulation screen for use in individually operating the control object device per operation unit, the screen information generation device is configured to generate the screen information based on the chart program such that a plurality of operation buttons that respectively correspond to the plurality of steps is displayed on the display device.. ... Jtekt Corporation

11/17/16 / #20160333946

Electromagnetic frictional engagement apparatus

The electromagnetic frictional engagement apparatus includes a housing member in which a housing space is formed, a clutch portion that couples the housing member in a disengageable manner to a shaft disposed so as to be rotatable relative to the housing member, and an electromagnetic coil that generates a magnetic force that actuates the clutch portion. The clutch portion has an outer clutch plate and an inner clutch plate that forms a magnetic path for a magnetic flux generated by the electromagnetic coil. ... Jtekt Corporation

11/17/16 / #20160333863

Divided cage and joint member for wind power generation apparatus

In a divided cage, a plurality of pockets for accommodating engaging elements between an inner ring and an outer ring of a one-way clutch are formed in a circumferential direction. The divided cage includes: a pair of ring-shaped portions which oppose each other in an axial direction and which are provided between the inner ring and the outer ring; and a plurality of pillar portions which are separated members from the pair of ring-shaped portions and which have end portions in the axial direction connected to the ring-shaped portions. ... Jtekt Corporation

11/17/16 / #20160332658

Rack guide unit

A rack guide unit includes a closure member, a rack guide, and an urging unit. The closure member is secured to an external opening end of an accommodation portion of a housing. ... Jtekt Corporation

11/03/16 / #20160319906

Worm reduction gear and steering system

A worm reduction gear includes a bias member that biases a second end of a worm shaft in such a direction that the second end approaches a worm wheel. A guide member that guides movement of the second end is held in a holding hole in a housing. ... Jtekt Corporation

11/03/16 / #20160319873

Rolling bearing

A cage has a small-diameter annular portion provided between an inner ring and an outer ring on a first side of a bearing in an axial direction and a plurality of cage bars extending from the small-diameter annular portion toward a second side of the bearing in the axial direction. In each of an inner peripheral surface and an outer peripheral surface of the small-diameter annular portion, recessed portions are formed which is each open toward a bearing exterior on the first side of the bearing in the axial direction. ... Jtekt Corporation

11/03/16 / #20160318544

Worm reduction gear and steering mechanism

In a worm reduction gear, a second bearing that supports a second end of a worm shaft and a guide member are housed in a holding hole in a housing. A bias member biases the second end of the worm shaft toward the worm wheel (in a second direction). ... Jtekt Corporation

10/27/16 / #20160314909

Lithium ion capacitor

Provided is a lithium ion capacitor that can retain a capacity under a high temperature environment and has small increase in internal resistance while using an aqueous binder for a positive electrode. A lithium ion capacitor includes: a positive electrode; a negative electrode; and an electrolytic solution contacting the positive electrode and the negative electrode. ... Jtekt Corporation

10/27/16 / #20160311083

Grinding wheel and method for manufacturing the same

A grinding wheel includes a plurality of super abrasive grains arranged so as not to contact one another; a vitrified bond formed like a bridge that bridges the plurality of super abrasive grains one another, and bonding the plurality of super abrasive grains one another; a plurality of fine grains arranged in the vitrified bond while forming a group and interposed between the plurality of super abrasive grains so that the plurality of super abrasive grains are arranged so as not to contact one another; and pores formed around the vitrified bond.. . ... Jtekt Corporation

10/20/16 / #20160308478

Motor control device and electric power steering system

In a motor control device that can perform more appropriate motor control, a switching arm has a first upper fet, a second upper fet, and a lower fet connected in series to one another. A source electrode of the second upper fet and a drain electrode of the lower fet are connected to each other via an intermediate line. ... Jtekt Corporation

10/20/16 / #20160307697

Magnet manufacturing method and magnet

A magnet manufacturing method has a step of preparing mixed powder of magnetic powder of a hard magnetic material, which includes one or more of an fe—n-based compound and an r—fe—n-based compound and a lubricant that allows formation of an adsorption film on a surface of the magnetic powder, a step of heating the mixed powder at a temperature that is equal to or higher than a melting point of the lubricant and that is lower than a decomposition temperature of the magnetic powder to form the adsorption film of the lubricant on the surface of the magnetic powder, a step of pressurizing and molding the magnetic powder in order to obtain a primary molding, and a step of heating the primary molding at a temperature that is lower than the decomposition temperature of the magnetic powder.. . ... Jtekt Corporation

10/20/16 / #20160307696

Magnet manufacturing method and magnet

A magnet manufacturing method has preparing magnetic powder of a hard magnetic material, which includes one or more of an fe-n-based compound and an r-fe-n-based compound, pressurizing and molding the magnetic powder at a pressure equal to or higher than a fracture pressure at which particles of the magnetic powder are destroyed in order to obtain a primary molding, and heating the primary molding at a temperature lower than a decomposition temperature of the magnetic powder. A particle size distribution measured for the magnetic powder indicates that, for the magnetic powder, a ratio of a particle size with a cumulative frequency of 50% to a particle size with a cumulative frequency of 3% is less than eight.. ... Jtekt Corporation

10/20/16 / #20160306333

Monitoring device for programmable controller

A monitoring device for a programmable controller can resume continuous operation from an appropriate step, when the equipment is restarted after abnormality handling process. The monitoring device includes: a read device that reads operating state information of equipment from the programmable controller during individual operation; a relationship information storage device that stores relationship information showing relationship between the first step to be executed out of the steps when the equipment is restarted after the individual operation and the operating state information; a selection device that refers to the operating state information and selects the first step to be executed when the equipment is restarted, based on the relationship information; and a command transmission device that transmits a command to change an in-execution flag of the programmable controller which shows the first step to be executed when the equipment is restarted, based on the selection result of the selection device.. ... Jtekt Corporation

10/20/16 / #20160303651

Magnet manufacturing method and magnet

A magnet manufacturing method has a step of preparing magnetic powder of a hard magnetic material, which includes one or more of an fe-n-based compound and an r-fe-n-based compound, a step of pressurizing and molding the magnetic powder at a pressure equal to or higher than a fracture pressure at which the particles of the magnetic powder are destroyed, to obtain a primary molding, and a step of heating the primary molding at a temperature lower than a decomposition temperature of the magnetic powder. The magnetic powder has at least two peaks in a particle size distribution.. ... Jtekt Corporation

10/13/16 / #20160298050

Sliding member, method of manufacturing sliding member, and gear

In a method of manufacturing a sliding member including a polyamide resin and a filler, a compound having a carbodiimide bond is supplied during kneading of the polyamide resin and the filler.. . ... Jtekt Corporation

10/13/16 / #20160297468

Vehicular steering system

An ecu acquires a steering torque detected by a torque sensor (step s1). The ecu drives an electromagnet of a solenoid actuator (step s2). ... Jtekt Corporation

10/13/16 / #20160297467

Steering system

A fulcrum formation member forming a fulcrum and a first spring engagement portion are provided in a bracket. A lever link that swings about the fulcrum includes a second spring engagement portion forming a point of load, and an elongated hole in which a fastening shaft is fitted so as to be movable in a longitudinal direction in association with tilt adjustment. ... Jtekt Corporation

10/13/16 / #20160297465

Steering spline telescoping shaft, and steering device

A spline telescoping shaft includes an inner shaft including a male spline and a tubular outer shaft including a female spline. A resin film is provided on a surface of at least either of both the splines. ... Jtekt Corporation

10/06/16 / #20160290406

Method of producing wheel bearing apparatus

A method of producing a wheel bearing apparatus includes: performing positioning of a slinger of a sealing device with respect to a base shaft portion of a hub spindle by pressing a jig to press-fit the slinger to the base shaft portion, using an inner ring contacted surface, which is a step portion between a small-diameter shaft portion and a large-diameter shaft portion of the hub spindle, as a reference surface; and fitting, after the slinger is press-fitted to the base shaft portion, an inner ring to the small-diameter shaft portion such that the inner ring reaches a position at which the inner ring comes into contact with the inner ring contacted surface, in a state where an outer ring, rolling elements, and the sealing device have been assembled to the hub spindle.. . ... Jtekt Corporation

10/06/16 / #20160290398

Rolling bearing

A rolling bearing includes an outer ring, an inner ring, a plurality of balls disposed between the outer ring and the inner ring and allowed to roll, and a snap cage that is made of resin and holds the balls. The snap cage includes an annular main portion and a plurality of cage bars. ... Jtekt Corporation

10/06/16 / #20160290393

Self-aligning roller bearing

A self-aligning roller bearing includes an outer ring, an inner ring, spherical rollers, a cage having a plurality of pockets that contain the spherical rollers, and a guide ring. Each spherical roller may be rotated on an imaginary line passing through a contact point at which the spherical roller contacts an outer raceway surface and a contact point at which the spherical roller contacts an inner raceway surface. ... Jtekt Corporation

10/06/16 / #20160288823

Rotation detection apparatus, rotation angle detection apparatus, and electric power steering system

A rotation detection apparatus, a rotation angle detection apparatus are provided which allow appropriate detection of an abnormality in a portion that detects rotation of a rotating shaft. A first arithmetic circuit calculates a rotating direction and a number of rotations of the rotating shaft based on a change in a combination of positivity and negativity of a first electric signal (first sine signal) and a third electric signal (first cosine signal). ... Jtekt Corporation

10/06/16 / #20160288822

Electric power steering system

An assist command value calculation circuit includes a torque shift control circuit, a phase lag compensation control circuit, a basic assist control circuit, and a phase lead compensation control circuit. A determination circuit determines whether a motor has been continuously under high load or not based on a current command value and a current limit value. ... Jtekt Corporation

10/06/16 / #20160288821

Steering system

A second tooth defining member includes a first portion rotatably supported around a support so as to be movable in the column axial direction and a second portion defining second teeth coming into meshing engagement with first teeth moving together with an upper jacket. A guide mechanism guides the second portion in an inclination direction inclined with respect to an orthogonal direction orthogonal to the column axial direction. ... Jtekt Corporation

10/06/16 / #20160288820

Steering system

When telescopic locking is released, a second tooth defining member operating in conjunction with rotation of a clamping shaft acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, a second portion of the second tooth defining member on which the second teeth are formed is guided by a second guide mechanism in an orthogonal direction orthogonal to the column axial direction to release meshing engagement between the first teeth and the second teeth. ... Jtekt Corporation

10/06/16 / #20160288817

Steering system

When telescopic locking is released, a second tooth defining member interlocked with rotation of a clamping shaft via an interlocking mechanism (a driving member and a coupling shaft) acts to separate second teeth of the second tooth defining member from first teeth arranged in a column axial direction. At this time, the second teeth rotate in a circular-arc-like trajectory around a central axis of a support shaft, while the support shaft itself slides through a long groove formed in an outer jacket in the column axial direction. ... Jtekt Corporation

10/06/16 / #20160288567

Hub unit

A hub unit includes: a bearing section including an outer ring, an inner ring disposed coaxially with and inside the outer ring, rolling elements disposed in a bearing inner space, and a sealing member sealing the bearing inner space at an end on a vehicle inner side; a hub ring including a body portion, and a wheel mounting flange portion on which a wheel is to be mounted; and a covering member protecting the bearing section from a foreign substance. The covering member is fixed to rotate integrally with the hub ring and the inner ring, and covers an end on the vehicle inner side of the bearing section. ... Jtekt Corporation

09/29/16 / #20160281775

Tapered roller bearing

A tapered roller bearing includes an outer ring having an outer-ring raceway surface that increases in diameter from a first side toward a second side in an axial direction, an inner ring having an inner-ring raceway surface and also having a cone back face rib that is located on the second side of the inner ring in the axial direction and that protrudes outward in a radial direction, a plurality of tapered rollers, an annular cage, and a reservoir portion provided on the second side of the outer ring in the axial direction and having a recessed groove that is formed on an inner periphery of the reservoir portion and in which lubricant is stored. The recessed groove has a recess and protrusion at its bottom.. ... Jtekt Corporation

09/29/16 / #20160281774

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers provided between the inner ring and the outer ring, and an annular cage. The cage has a small-diameter annular portion on a first side in an axial direction, a large-diameter annular portion on a second side in an axial direction, and a plurality of cage bar portions. ... Jtekt Corporation

09/29/16 / #20160281773

Tapered roller bearing

A tapered roller bearing includes an outer ring having an outer-ring raceway surface that increases in diameter from a first side toward a second side in an axial direction, an inner ring having an inner-ring raceway surface and having a cone large face rib that is located on the second side of the inner ring in the axial direction, a plurality of tapered rollers, an annular cage, and a holding member provided on the second side of the outer ring in the axial direction to enable a lubricant inside the bearing to be held. The holding member has a cylindrical portion provided adjacently to the outer ring and a protruding portion protruding inward from the cylindrical portion in the radial direction. ... Jtekt Corporation

09/29/16 / #20160280255

Electric power steering system and gain setting method thereof

In an electric power steering system, an ecu includes a rotation angle calculation unit, an assist torque command value calculation unit, a reference model, an angle deviation calculation unit, a pd control unit, an addition unit, and a plant observer. A proportional gain and a derivative gain which are used in the pd control unit and a first gain and a second gain which are used in a first gain multiplication unit and a second gain multiplication unit of the plant observer are set so that a characteristic equation corresponding to an equation of motion representing behavior of the electric power steering system has a double root.. ... Jtekt Corporation

09/29/16 / #20160280064

Four-wheel drive vehicle and control device for four-wheel drive vehicle

Provided is a control device for a four-wheel drive which can maintain driving stability while restraining noise and vibration. A control device includes: a second control device that, when at least one of front wheel has slipped, engages a dog clutch after rotating a propeller shaft by a rotational force transmitted via first and second friction clutches; and a third control device that, if a predetermined condition is satisfied when the front wheels are not slipping, engages the dog clutch after rotating the propeller shaft by the rotational force transmitted via the first and second friction clutches. ... Jtekt Corporation

09/22/16 / #20160273982

Torque detection apparatus

A torque detection apparatus includes a magnetic element that outputs a signal corresponding to a magnetic flux from a magnetic circuit including a magnetic yoke. The torque detection apparatus further includes a signal retrieval member electrically connected to the magnetic element, and a unit housing formed of resin and molded integrally with the magnetic element and the signal retrieval member so as to cover the magnetic element and the signal retrieval member. ... Jtekt Corporation

09/22/16 / #20160273641

Rack shaft and steering system

A rack shaft of the present invention includes: an effective rack tooth row formed by plastic deformation of a shaft member and having a plurality of rack teeth that mesh with a pinion; a ball screw portion having no rack tooth; an ineffective rack tooth that is formed between the effective rack tooth row and the ball screw portion and that does not mesh with the pinion; and a padding portion that extends from an end of the ball screw portion toward the ineffective rack tooth and that covers at least a part of the ineffective rack tooth.. . ... Jtekt Corporation

09/22/16 / #20160272237

Steering system

A steering system includes a steering mechanism, a motor that is a source of an assist force, and a battery that supplies a voltage to the motor. The system includes a voltage sensor that detects a power supply voltage, a steering sensor that detects a steering angle, and a motor control signal generation circuit that calculates a q-axis voltage command value to allow the motor to generate the assist force and that generates a motor control signal based on the q-axis voltage command value. ... Jtekt Corporation

09/15/16 / #20160265587

Tapered roller bearing and power transmission apparatus

A tapered roller bearing includes inner ring, outer ring, plurality of tapered rollers placed between inner and outer rings, and retainer having pockets receiving tapered rollers. Small diameter annular portion of retainer closes a small diameter side opening portion so that lubricating oil more than needed for lubrication can be limited from flowing into a bearing internal space. ... Jtekt Corporation

09/15/16 / #20160265515

Joint structure and wind power generation device

A joint structure includes: an output side transmission shaft which rotates integrally with an output shaft of a speed increaser; an input side transmission shaft which rotates integrally with an input shaft of the speed increaser; a fixed housing; a bearing; and a one-way clutch which is fitted in the fixed housing. The one-way clutch integrally rotatably connects the output side transmission shaft and the input side transmission shaft under a condition where a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and releases the connection between the output side transmission shaft and the input side transmission shaft under a condition where the rotation speed of the output shaft is lower than the rotation speed of the input shaft.. ... Jtekt Corporation

09/15/16 / #20160263743

Conveying robot

A conveying robot is provided which can have a reduced maximum height and which can convey an object fast and stably. A conveying robot has at least one of a characteristic that a first driven link that configures the conveying robot is formed to have a bent shape that protrudes toward a second driven link with respect to a straight line that connects a first intermediate rotation support and a first tip-side rotation support, and a characteristic that the second driven link is formed to have a bent shape that protrudes toward the first driven link with respect to a straight line that connects a second intermediate rotation support and a second tip-side rotation support.. ... Jtekt Corporation

09/15/16 / #20160263724

Grinding wheel and grinding machine

A grinding wheel includes a plurality of abrasive grains and a binder holding the abrasive grains together. The binder contains an additive that has a higher extinction coefficient than the abrasive grains at a wavelength in a predetermined frequency band. ... Jtekt Corporation

09/15/16 / #20160262969

Swinging joint device, walking assisting device, conveying device, manipulator, and walking-ability assisting device

A swinging joint device includes a driving shaft member; a first output portion that swings about a driving axis serving as an axis of the driving shaft member; an elastic body that generates an urging torque corresponding to a first swinging angle that is a swinging angle of the first output portion; an apparent rigidity variable portion that varies apparent rigidity of the elastic body seen from the first output portion; a first angle detection portion that detects the first swinging angle; and a control portion that controls the apparent rigidity variable portion according to the first swinging angle detected by the first angle detection portion to adjust the apparent rigidity of the elastic body seen from the first output portion.. . ... Jtekt Corporation

09/08/16 / #20160257850

Method for manufacturing telescopic shaft

A method for manufacturing a telescopic shaft including a male shaft and a cylindrical female shaft slidably connected to each other in an axial direction, in which an outer circumferential surface of the male shaft or an inner circumferential surface of the female shaft is coated with a resin coating layer, includes a coating step, a broaching step, and a cooling step. In the coating step, a powder coating material is attached, by a fluid bed dip method, on the outer circumferential surface of the male shaft or the inner circumferential surface of the female shaft which is heated in advance and the resin coating layer is formed. ... Jtekt Corporation

09/08/16 / #20160257337

Electric power steering apparatus

An electric power steering apparatus is configured to provide steering assistance as rotary torque of a driving toothed-pulley fixedly fitted to a rotary shaft of an electric motor is transmitted through a toothed belt to a driven toothed-pulley that rotates together with a ball screw nut in an integrated manner. The electric power steering apparatus is configured such that the amount of axial travel of a rack shaft is limited when a rack end and a housing come into contact with each other in the axial direction. ... Jtekt Corporation

09/08/16 / #20160257335

Modular cradle for a vehicle drive train comprising a transverse base receiving a lightweight split steering housing

The present invention concerns a method for assembling a modular cradle (1) for a vehicle steering axle, said method comprising a prefabrication step (a), which involves separately producing a base (3), a first module (10) that comprises a first section (2a) of a steering housing (2) for guiding a rack, and a first bearing (11) for receiving a stabiliser bar (13), a second module (20), separate from the base (3) and from the first module (10), which comprises a second section (2b) of the steering housing (2) for guiding the rack and a second bearing (21) for receiving the stabiliser bar (13), followed by an assembly step (b), which involves mounting and securing the first module (10) on a left-hand receiving area (7) of the base (3), and the second module (20) on a right-hand receiving area (8) of said base (3).. . ... Jtekt Corporation

09/01/16 / #20160254732

Motor unit

A motor unit includes a motor; and a control board configured to execute a control to drive the motor. The control board includes a first control board and a second control board. ... Jtekt Corporation

09/01/16 / #20160252403

Temperature detection apparatus and rotation angle detection apparatus

A temperature detection apparatus and a rotation angle detection apparatus are provided that allow a temperature of a resolver to be calculated in real time. A rotation angle detection apparatus (10) (temperature detection apparatus) includes a resolver (20) with an excitation coil and output coils wound thereon, the excitation coil being subjected to an excitation voltage (va) and the output coil outputting voltage signals (vb, vc) corresponding to the excitation voltage (va), and a temperature calculation circuit (sensor microcomputer (32)) that detects a phase of the excitation voltage (va) and that detects a phase of an excitation current (ia). ... Jtekt Corporation

09/01/16 / #20160250733

Machining apparatus

A machining apparatus is of an in-feed type configured to machine an outer peripheral surface of a rotating tapered roller, and includes a rotating mechanism having a lateral pair of rollers on which the tapered roller is mounted, the rotating mechanism rotating the pair of rollers, and a grinding stone that is brought into contact with the outer peripheral surface of the tapered roller mounted on the pair of rollers. Each roller of the pair of rollers is shaped like a truncated cone. ... Jtekt Corporation

08/25/16 / #20160245339

Roller bearing cage, assembly and production method therefor, and roller bearing

A roller bearing cage according to one aspect of the invention is a cage having a ring shape for retaining an interval along a circumferential direction between a plurality of rolling elements in a roller bearing. The roller bearing cage includes: a plurality of bar-shaped members which are arranged along the circumferential direction and which restrain movement of the rolling elements along the circumferential direction; a plurality of connecting members, each of which connects end portions along a lengthwise direction of the bar-shaped members adjacent to each other along the circumferential direction; and a fixing structure which fixes the bar-shaped member and the connecting member so as to be relatively unrotatably around an axis line along the lengthwise direction of the bar-shaped member.. ... Jtekt Corporation

08/25/16 / #20160244092

Drive assist control apparatus

In a drive assist control apparatus, based on a pinion angle command value and an lka angle command value, a distribution ratio calculation unit calculates a distribution ratio that is a proportion of the lka angle command value in a sum of the lka angle command value and the pinion angle command value. An la determination unit compares an la threshold with a lateral acceleration that is related to the lka angle command value and that is a product of a lateral acceleration and the distribution ratio, and determines whether or not to attenuate the lateral acceleration. ... Jtekt Corporation

08/25/16 / #20160244087

Steering system

A steering system includes an outer jacket including a pair of clamped portions disposed on both sides of a slit, an inner jacket coated with an insulating coating layer all along an outer periphery of the inner jacket except for a predetermined area, an upper bracket that supports the clamped portions and that is fixed to a vehicle body, and a clamping mechanism including a clamping shaft that is supported in clamping shaft insertion holes in the clamped portions so as to be energized. The steering system further includes a conductive elastic member including a first portion engaged with one of a slit inside portion of the clamping shaft positioned in the slit and the predetermined area so as to be energized and a second portion that slide-contacts the other of the slit inside portion and the predetermined area.. ... Jtekt Corporation

08/18/16 / #20160238078

Rolling bearing apparatus

A rolling bearing apparatus includes a bearing portion having an outer ring, an inner ring, a plurality of balls, and a cage that holds the balls, and an auxiliary portion provided adjacently to the bearing portion in an axial direction. The auxiliary portion has an auxiliary body portion provided adjacently to the outer ring in the axial direction and an extension portion extending in the axial direction from the auxiliary body portion and interposed between the cage and the inner ring. ... Jtekt Corporation

08/18/16 / #20160237227

Fiber reinforced thermoplastic resin member

A fiber reinforced thermoplastic resin member is formed by impregnating continuous fibers with a thermoplastic resin. As surfaces of the fiber reinforced thermoplastic resin member, surface layers are provided which are formed of a thermoplastic resin having a higher molecular weight than the thermoplastic resin.. ... Jtekt Corporation

08/18/16 / #20160236706

Steering system and rack shaft used for the steering system

A steering system includes a pinion shaft with pinion teeth formed thereon, a rack shaft with rack teeth formed thereon and meshing with the pinion teeth, and a pair of stoppers that regulates movement of the rack shaft at right and left stroke end positions of the rack shaft. The rack teeth are formed such that the rack teeth on a first end side of the rack shaft and the rack teeth on a second end side of the rack shaft are asymmetric with respect to a reference position, the reference position being an area of the rack teeth, in which the rack teeth mesh with the pinion teeth in a steering neutral state. ... Jtekt Corporation

08/18/16 / #20160236321

Truing method and truing device

In a state where a first truer rotation axis is maintained parallel to a grindstone rotation axis, a grindstone outer circumferential surface, and outer circumference arcuate surfaces which are partial surfaces of grindstone arcuate surfaces, and which are continuous to the grindstone outer circumferential surface are trued by using a first truer. In a state where a second truer rotation axis is maintained in a direction perpendicular to the grindstone rotation axis, grindstone end surfaces, and end surface arcuate surfaces which are remaining surfaces of the grindstone arcuate surfaces, and which are continuous to the grindstone end surfaces are trued by using a second truer.. ... Jtekt Corporation

08/11/16 / #20160229446

Electric power steering system

Provided is an electric power steering system that achieves a more appropriate steering feel. An ecu of the electric power steering system calculates a basic assist component and a target pinion angle based on at least steering torque. ... Jtekt Corporation

08/04/16 / #20160221605

Method for calculating, in real time, the absolute position of a power steering member with improved accuracy

The present invention concerns a method for determining the position of a movable steering member (1, 2, 3) belonging to a steering mechanism (4) of a vehicle that comprises at least a first movable member (1), such as a shaft (1) of an assistance motor (m), and a second movable member (2), such as a rack (2), which cooperate with each other by means of at least one first link (l1), said method comprising a step (a) that involves measuring the position (θ1) of the first member (1), then a step (b) that involves calculating the instantaneous position (θ2) of the second member (2) from said position of the first member (θ1), and a correction step (d) during which the calculation of the position (θ2) of the second member (2) is adapted, taking into consideration the offset (δνυ) in the position of the second member (2) that results from the elastic deformation of the first link (l1) under the force (c1) transmitted by the latter.. . ... Jtekt Corporation

08/04/16 / #20160221601

Use of a power-steering motor to simulate an end-of-travel stop for said steering

A method for managing a power-steering motor configured to supply a force to assist the movement of a steering rack involves the steering rack being mounted such as to be movable between at least a first position and a second position in order to be able to change the steering angle of a steered wheel. The method includes the steps of defining a virtual end-of-travel threshold strictly between the first position and the second position. ... Jtekt Corporation

08/04/16 / #20160221138

Feed apparatus and machine tool

A feed apparatus includes a base, a moving member that is movable in a predetermined axial direction with respect to the base, a first screw shaft provided on the base so as to be parallel to the axial direction, a second screw shaft provided separately from the first screw shaft on the base so as to be parallel to the predetermined axial direction, a first motor mounted on the base to rotate the first screw shaft, a second motor mounted on the base to rotate the second screw shaft, a first nut provided on the moving member and moving in the predetermined axial direction in conjunction with rotation of the first screw shaft, and a second nut provided on the moving member and moving in the predetermined axial direction in conjunction with rotation of the second screw shaft. The first nut and the second nut are disposed at different positions in the predetermined axial direction.. ... Jtekt Corporation

07/28/16 / #20160215822

Rolling bearing

A rolling bearing includes a resin cage. The resin cage includes a pair of split members split in two halves in an axial direction. ... Jtekt Corporation

07/28/16 / #20160215818

Hydrostatic bearing apparatus, machine-tool main-spindle apparatus including hydrostatic bearing apparatus, and method for manufacturing hydrostatic bearing apparatus

A hydrostatic bearing apparatus includes a bearing metal having a hydrostatic portion that allows a grinding wheel shaft to be rotatably supported. The hydrostatic portion has a bearing clearance, a bearing surface portion, a plurality of pockets, and partition plates. ... Jtekt Corporation

07/28/16 / #20160214640

Steering system

A steering system includes an engaged member fixed to an upper jacket, an engaging member rotatably supported by a lower jacket, and an impact absorbing member including a movable portion that moves together with the engaging member at the time of a secondary collision, to absorb impact made at the time of the secondary collision. The engaged member has a plurality of engaged teeth. ... Jtekt Corporation

07/28/16 / #20160214638

Steering system

An outer jacket externally fitted over an inner jacket so as to be slidable in an axial direction relative to the inner jacket has a slit extending straight from an opening formed at a jacket end. A recessed portion is formed at an inner edge of the slit such that a slit width at an inside diameter portion of the outer jacket is larger than a slit width at an outside diameter portion of the outer jacket. ... Jtekt Corporation

07/28/16 / #20160214233

Grinding wheel and method for manufacturing the same

A grinding wheel includes: a plurality of abrasive grains arranged so as not to contact with one another; interval adjustment materials interposed between the abrasive grains, arranged in contact with the abrasive grains, and having a grain size that allows a distance between the abrasive grains to be equal to a minimum separation distance; a binder that binds each of the abrasive grains to the interval adjustment materials; and pores formed between the abrasive grains.. . ... Jtekt Corporation

07/14/16 / #20160201786

Gear reducer having a sealing plug providing axial support to a spring for gear slack compensation

The invention relates to a gear reducer (1) for an assisted-steering module, including a casing (3), a worm (4) which meshes with a worm wheel (6), and a spring (10) for taking up gear play, which presses said worm (4) radially against the worm wheel (6), the wall of the casing (3) being bored, away from of the axis (xx′) of the worm, with an opening (14) sealed by a plug (15), the spring (10) for taking up gear play including at least one retaining lug (17, 18) which projects radially to the axis (xx′) of the worm (4), and the hub (20) of the plug (15) having a guiding wall (21) that is substantially transverse to the axis (xx′) of the worm (4), which is designed to be placed axially opposite said at least one retaining lug (17, 18), in order to prevent the axial movement of the spring (10) beyond a predetermined functional travel.. . ... Jtekt Corporation

07/14/16 / #20160201731

Sliding constant-velocity joint

A constant-velocity joint 1 includes an outer ring with three raceway grooves formed therein, a tripod member having three tripod shaft portions, and roller units each having a cylindrical inner roller externally fitted over the corresponding tripod shaft portion and an outer roller. The outer roller has an annular surface facing a ceiling surface of a raceway groove. ... Jtekt Corporation

07/14/16 / #20160201649

Joint structure and wind power generation device

A joint structure includes a clutch unit interposed between a shaft joint and a shaft body which is one of an output shaft of a speed increaser and an input shaft of a power generator. The clutch unit includes: a shaft coupling portion rotating integrally with the shaft body; a joint coupling portion rotating integrally with the shaft joint; and a one-way clutch provided between the shaft coupling portion and the joint coupling portion. ... Jtekt Corporation

07/07/16 / #20160195145

Rotation transmission device and wind power generation device equipped with the same

A rotation transmission device includes a one-way clutch which is provided between an output shaft of a speed increaser and an input shaft of a generator, which makes a connection between the output shaft and the input shaft to be rotatable integrally in a state in which a rotation speed of the output shaft is higher than that of the input shaft, and which cuts off the connection between the output shaft and the input shaft in a state in which the rotation speed of the output shaft is lower than that of the input shaft. The rotation transmission device further includes: a measurement section which measures a state of the one-way clutch which changes depending on a load exerted to the one-way clutch; and an acquisition section which acquires the load exerted to the one-way clutch on a basis of a measurement result of the measurement section.. ... Jtekt Corporation

07/07/16 / #20160194024

Electric power steering system

A power transmission coupling that couples an output shaft of an electric motor and a worm shaft together includes a first rotation element coupled to the output shaft, a second rotation element coupled to the worm shaft, and an intermediate element formed of an elastic body and interposed between the first rotation element and the second rotation element. The intermediate element forms a unit integrally including an annular support portion, power transmission portions extending radially from the support portion and interposed between engaging protrusions of the first rotation element and the second rotation element, a spacer arranged inward of the support portion in a radial direction to apply a preload to the worm shaft in an axial direction, and a coupling portion that couples the support portion and the spacer together.. ... Jtekt Corporation

07/07/16 / #20160193675

Cutting tool and spline processing method

A cylindrical cutting tool for processing splines formed on an outer circumference of a shaft member to extend in an axial direction includes blade portions which are formed in a spline shape on an inner circumference. The blade portions include: a first blade portion which is formed in a terminal end portion in a first direction along the axial direction and which is directed substantially toward the first direction; and a second blade portion which is formed in a terminal end portion in a second direction along the axial direction and opposite to the first direction and which is directed substantially toward the second direction.. ... Jtekt Corporation

06/16/16 / #20160169300

Driving force transmission device

A driving force transmission device includes an inner ring; an outer ring; a roller pair constituted by a first roller and a second roller; an elastic member; a first cage including a first pressing portion; a second cage including a second pressing portion; a first guide member; a second guide member; and an electromagnetic clutch including an armature connected to the first and second guide members. Along with rotation of the first cage toward the circumferential second side, the first pressing portion presses the first roller toward the circumferential second side. ... Jtekt Corporation

06/16/16 / #20160169285

Tapered roller bearing and power transmission device using tapered roller bearing

A tapered roller bearing including: an inner ring; an outer ring; a plurality of tapered rollers; and a retainer. A small diameter side annular portion is formed in an end portion of the retainer located on a small diameter side of an inner ring raceway surface. ... Jtekt Corporation

06/16/16 / #20160169201

Wind power generator device and rotation transmission device used in same

A wind power generator device includes: a windmill which rotates by receiving wind power; a power generator including a rotor; and a rotation transmission device which transmits rotation of the windmill to the rotor without a speed increase. The rotation transmission device includes a one-way clutch which makes a connection integrally and rotatably between the windmill and the rotor in a state in which a rotation speed of the windmill is higher than a rotation speed of the rotor, and which releases the connection in a state in which the rotation speed of the windmill is lower than the rotation speed of the rotor.. ... Jtekt Corporation

06/16/16 / #20160167696

Steering device

There is provided a steering device having a configuration in which a movable bracket can move relatively to a fixed bracket along with a steering member toward the downstream side in a movement direction, at the time of the second collision. A sliding member that is assembled to the movable bracket includes a main body section and a bent section. ... Jtekt Corporation

06/16/16 / #20160167693

Steering system

A steering system includes a column jacket that can extend and contract in an axial direction as a result of relative movement between an inner jacket and an outer jacket that houses the inner jacket, a regulation member fixed to the outer jacket and passing through an insertion hole in the inner jacket, and an elastic member fixed to the outer jacket. At the time of vehicular collision, when the regulation member is sheared by a peripheral portion of the insertion hole in the inner jacket in conjunction with the relative movement between the inner jacket and the outer jacket, a tip portion of the elastic member is fitted in the insertion hole.. ... Jtekt Corporation

06/16/16 / #20160167691

Steering system

A steering system includes an upper jacket that is movable in an axial direction, a first stopper member fixed to the upper jacket, and a second stopper member on a vehicle body. When a lock and unlock mechanism unlocks the upper jacket, the second stopper member moves to an advanced position where the second stopper member faces the first stopper member in the axial direction. ... Jtekt Corporation

06/09/16 / #20160161289

Rotation angle detection device

A rotation angle detection device is provided which can detect a mechanical angle of a motor having any number of pole pairs. An electrical angle detected by an amr sensor is multiplied by ½. ... Jtekt Corporation

06/09/16 / #20160159390

Electric power steering apparatus and controlling method

An electric power steering apparatus includes a control unit that calculates an assist controlled variable based on a plurality of types of state variables indicating steering statuses and controls a motor that serves as a generation source of an assist force applied to a steering mechanism of a vehicle based on the assist controlled variable. The control unit is configured to separately set limit values, which limit a change range of the assist controlled variable according to the respective state variables used to calculate the assist controlled variable, to the respective state variables, add up the limit values to generate ultimate limit value for the assist controlled variable, and perform limitation processing to limit the ultimate limit value for an assist controlled variable having a sign opposite to a sign of a steering torque that is one of the plurality of types of state variables.. ... Jtekt Corporation

06/02/16 / #20160153501

Sliding shaft and steering device

In a sliding shaft, an outer circumferential surface of a male shaft is coated with a resin coating layer formed by a fluidized bed powder coating method by using a powder coating material containing a base resin and an aliphatic compound. A steering device includes this sliding shaft as an intermediate shaft transmitting steering force.. ... Jtekt Corporation

06/02/16 / #20160153500

Sliding shaft and steering device

In a sliding shaft, an outer circumferential surface of a male shaft is coated with a resin coating layer formed by a fluidized bed powder coating method using a powder coating material containing a base resin and at least either a carbon black or a metal oxide as an antistatic agent. A steering device includes this sliding shaft as an intermediate shaft transmitting steering force.. ... Jtekt Corporation

06/02/16 / #20160152238

Control apparatus for four-wheel drive vehicle

A four-wheel drive vehicle includes front wheels, rear wheels to which a driving force of an engine is transmitted via a propeller shaft, a dog clutch that enables blocking of transmission of the driving force from the engine to the propeller shaft, and a multi-disc clutch that enables blocking of transmission of the driving force from the propeller shaft to the rear wheels. During two-wheel driving in which the transmission of the driving force through the dog clutch and the multi-disc clutch is blocked, an ecu in the four-wheel drive vehicle calculates an estimated driving force estimated to be transmitted to the front wheels based on a vehicle speed and an amount of acceleration operation. ... Jtekt Corporation

05/26/16 / #20160146367

Solenoid valve

A solenoid valve is provided which can be reduced in size while allowing a plunger and a shaft to slide smoothly. A solenoid valve includes a solenoid portion with a plunger that moves in an axial direction using a magnetic force generated by a solenoid coil. ... Jtekt Corporation

05/26/16 / #20160146261

Method for measuring bearing cup gap in universal joint and method for manufacturing universal joint to which the measuring method is applied

Provided are a method for measuring a bearing cup gap in a universal joint that enables bearing cups to be easily and accurately assembled to a yoke member, and a manufacturing method for a universal joint, to which the measuring method is applied. The measuring method is used for a universal joint including a yoke member, bearing cups, and a joint spider member to measure gaps between bottom surfaces of the bearing cups and the joint spider member. ... Jtekt Corporation

05/26/16 / #20160144886

Steering system

A steering system includes an upper bracket having a first tooth row, a rigid tooth member, a second tooth row provided on the tooth member, a first moving member, and an elastic member disposed between the tooth member and the first moving member. The first tooth row includes a plurality of first teeth. ... Jtekt Corporation

05/26/16 / #20160144885

Steering system

In a steering system configured such that occurrence of a half lock is suppressed, when a body portion of a tooth member is pressed in a lock operation of locking the position of a steering column, the tooth member is extended to move a pair of second tooth row forming portions away from each other obliquely with respect to a lateral direction of an elongate tilt hole along the outer surface of a fastening side plate.. . ... Jtekt Corporation

05/26/16 / #20160144475

Grinding machine and grinding method

A grinding machine includes a wheel spindle stock in which a wheel spindle is rotatably provided. The wheel spindle moves between first and second spindles so that a third rotation axis of the wheel spindle moves in the direction perpendicular to first and second rotation axes on an xz plane extending through the first and second rotation axes. ... Jtekt Corporation

05/19/16 / #20160138726

Pressure reduction valve and gas supply device

The pressure reduction valve includes: a cylindrical portion, a piston and a spring. The cylindrical portion includes an inlet communicating with the primary side flow path and an outlet communicating with the secondary side flow path. ... Jtekt Corporation

05/19/16 / #20160136768

Machining apparatus and machining method

A machining apparatus includes: a workpiece spindle having a retainer that retains a workpiece having a noncircular peripheral surface; an adjustment unit that adjusts a retaining force between the workpiece and the retainer; a phase determination member that can determine a phase of the workpiece; and a phase determination detection unit that detects completion of the phase determination. The retaining force is a retaining force for phase determination until the phase determination is completed, and the retaining force is switched to a retaining force for machining which is larger than the retaining force for phase determination after the phase determination is completed.. ... Jtekt Corporation

05/12/16 / #20160131257

Sealing device

A sealing device which allows the man-hour for mounting the sealing device to be reduced is provided. A sealing device includes: a slinger fitted and fixed to an end portion of an inner shaft; a core metal fitted and fixed to an end portion of an outer ring; an inner seal lip fixed to the core metal and in slidable contact with the slinger; an outer seal lip fixed to the core metal radially outward of the inner seal lip and in slidable contact with a side surface of a flange portion; and a labyrinth lip fixed to the core metal radially outward of the outer seal lip and forming a labyrinth seal together with the side surface of the flange portion.. ... Jtekt Corporation

05/12/16 / #20160131196

Telescopic shaft

A telescopic shaft includes an inner shaft and a cylindrical outer shaft that are fitted together. A first raceway groove extending in the axial direction is formed in an outer peripheral surface of the inner shaft. ... Jtekt Corporation

05/12/16 / #20160129511

Gear machining device and gear machining method

A gear machining device for machining a gear by using a machining tool which has a rotation axis inclined relative to a rotation axis of a workpiece and feeding the machining tool relatively in the rotation axis direction of the workpiece by rotating the machining tool in synchronization with a rotation of the workpiece. The gear machining device includes a tool state memorizing portion for memorizing a tool state including a position or a posture of the machining tool relative to the workpiece for machining a tooth bottom, first and second side surfaces of the gear and a machining control portion for controlling machining of the workpiece under each tool state of the machining tool memorized in the tool state memorizing portion.. ... Jtekt Corporation

05/05/16 / #20160126792

Interior permanent magnet rotor and method and apparatus for manufacturing the same

An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. ... Jtekt Corporation

05/05/16 / #20160123823

Sensor system

Provided is a sensor system capable of more accurately detecting abnormality. A sensor ic includes a first detector, a second detector, and a communication circuit. ... Jtekt Corporation

05/05/16 / #20160122538

Sealing material

Provided is a sealing material used for sealing high-pressure hydrogen. The sealing material is a molded article of a rubber composition containing a rubber component, fibers, and a carbon black.. ... Jtekt Corporation

05/05/16 / #20160121923

Electric power steering system

An electric power steering system includes a control unit configured to: compute an assist control amount (current amount), based on multiple kinds of state quantities indicating a steering state; control a motor based on the assist control amount, the motor being a source of assist force to be applied to a steering system of a vehicle; individually set, for the respective state quantities, limiting values that limit a variation range of the assist control amount, based on the respective state quantities used to compute the assist control amount; limit a value of the assist control amount using the limiting values; acquire a command value generated by a host control unit to change the assist control amount; and take the command value into account in setting of at least one of the limiting values, when executing control of the motor based on the assist control amount that reflects the command value.. . ... Jtekt Corporation

04/28/16 / #20160114827

Steering column device

A steering column device includes a first tube on an inner side and a second tube on an outer side which are fitted into each other so as to be relatively slidable in an axial direction, and rotatably support a steering shaft. A plurality of projections that come into contact with the inner periphery of the second tube and extend in the axial direction of the first tube are provided on the outer periphery of the first tube. ... Jtekt Corporation

04/28/16 / #20160114544

Gear and manufacturing method thereof

A reinforcing fiber sheet and a first thermoplastic resin sheet are stacked into a cylindrical shape to form a sleeve portion, and a second thermoplastic resin sheet is stacked around an outer periphery of the sleeve portion to form a tooth formation portion. Thereafter, the sleeve portion and the tooth formation portion are heated and pressed, and teeth are then formed in an outer periphery of the tooth formation portion to form a tooth portion. ... Jtekt Corporation

04/07/16 / #20160096227

Main spindle device of machine tool

A main spindle device includes: a main spindle; a rod accommodated in the main spindle, the rod being capable of moving to an unclamp position in a direction toward the first end, and when the main spindle is holding a tool, being capable of moving to a clamp position in a direction toward a second end; a biasing unit that biases the rod in the direction toward the second end with respect to the main spindle and that biases the rod to the clamp position when a collet is holding the tool; and a biasing force detector that detects a biasing force of the biasing unit which biases the rod in the direction toward the second end after the rod is moved in the direction toward the first end with respect to the main spindle to the unclamp position by force larger than the biasing force of the biasing unit.. . ... Jtekt Corporation

03/17/16 / #20160076794

Machine tool

A machine tool includes a thermoacoustic apparatus and a fluid supply apparatus, utilizes exhaust heat from a constituent apparatus of the machine tool to cool a heat exchanger included in the thermoacoustic apparatus due to a thermoacoustic effect. Thus, a cooling fluid is cooled which is used to cool a bearing and a machining point.. ... Jtekt Corporation

03/17/16 / #20160075370

Electric power steering system

Restriction values (upper limit and lower limit) for an assist control amount are set individually for each of state amounts including steering torque τ used to compute the assist control amount. A value obtained by summing such restriction values is set as a final restriction value for the assist control amount. ... Jtekt Corporation

03/17/16 / #20160075367

Steering device

A steering device includes: a rotary shaft supported by an upper bracket; a plurality of engaged teeth fixed to an upper jacket; a lock member including engaging teeth to mesh with the engaged teeth; and a support shaft supported by a lower jacket at a position farther away from the engaged teeth than the rotary shaft 35. When the rotary shaft is rotated, a first rotary member is rotated in synchronization with the rotary shaft. ... Jtekt Corporation

03/17/16 / #20160075052

Apparatus and method for manufacturing an electricity storage material

An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of the solution of the thickener; a stirring device that mixes the solution of the thickener adjusted in viscosity and powder of an active substance to produce a first mixture, and stirs the first mixture to produce a second mixture; a heating device that heats the solution of the thickener or the first mixture by the time the stirring of the first mixture is started after the solution of the thickener is produced, so as to heat the solution of the thickener contained in the first mixture; and a kneading device that kneads the solution of the thickener and the powder of the active substance which are contained in the second mixture to produce a third mixture.. . ... Jtekt Corporation

03/17/16 / #20160074928

Hub unit manufacturing apparatus

An axial section of a continuous portion where an outer peripheral surface of a spindle portion of a main spindle in which a punch is installed is continuous with an outer peripheral surface of a punch holder is formed of a first circular arc joined to the outer peripheral surface of the spindle portion and a second circular arc joined to the outer peripheral surface of the punch holder. The first circular arc and the second circular arc are in contact with each other. ... Jtekt Corporation

03/10/16 / #20160069423

Worm speed reducer

A center axis of a worm shaft is offset in an offset direction with respect to a plane that is orthogonal to a center axis of a worm wheel and that passes through a central position of the worm wheel in a tooth width direction. A bias member biases a second end of the worm shaft in a preloading direction in which a center distance between the worm shaft and the worm wheel decreases. ... Jtekt Corporation

03/10/16 / #20160069395

Intermediate shaft

In an intermediate shaft for a steering system, the surface of external splines of an inner shaft is coated with a resin coating layer containing a base resin and two or more kinds of higher fatty acid metal salts having different melting point peaks from each other.. . ... Jtekt Corporation

03/10/16 / #20160068779

Sliding member

In a sliding member, a sliding surface of a substrate of fluorine rubber on which another member slides is covered with a coating that is formed of an epoxy resin having a scratch hardness (pencil method) after curing of f to 2h and in which fluorine resin powder is dispersed.. . ... Jtekt Corporation

03/03/16 / #20160061288

Flywheel

A flywheel includes a wheel ring and a hub ring fitted into the wheel ring. A hub ring main body of the hub ring pressure-contacts an inner periphery of the wheel ring while the flywheel is rotating. ... Jtekt Corporation

03/03/16 / #20160061259

Taper roller bearing

A taper roller bearing includes: an inner ring; an outer ring; taper rollers; and a cage. A first sliding surface is provided in at least one of annular portions of the cage to slide-contact end surfaces of the taper rollers so as to axially position the cage by the end surfaces of the taper rollers. ... Jtekt Corporation

03/03/16 / #20160059381

Grinding wheel truing method and grinding machine for carrying out truing method

In a grinding wheel truing method of an aspect of the present invention, an outer peripheral surface of a grinding wheel is trued while a position of a truer with respect to the grinding wheel is moved from one end side toward the other end side in the axial direction of the grinding wheel. In the truing, a relative movement speed of the truer when a position of the outer peripheral surface of the grinding wheel which grinds a large-diameter portion of a conical surface of a work is trued is lower than a relative movement speed of the truer when a position of the outer peripheral surface of the grinding wheel which grinds a small-diameter portion of the conical surface of the work is trued.. ... Jtekt Corporation

02/25/16 / #20160053810

Rolling bearing

A rolling bearing includes an outer ring, an inner ring in which a shoulder diameter at one end of the rolling bearing in an axial direction is different from a shoulder diameter at the other end of the rolling bearing in the axial direction, a cage, a plurality of rolling elements, and shielding portions. A first clearance between an outer ring inner peripheral surface facing a large end of the inner ring having the larger shoulder diameter and a cage outer peripheral surface facing the outer ring inner peripheral surface is larger than a second clearance between an outer ring inner peripheral surface facing a small end of the inner ring having the smaller shoulder diameter and a cage outer peripheral surface facing the outer ring inner peripheral surface.. ... Jtekt Corporation

02/25/16 / #20160052538

Rack guide device and steering apparatus including same

A rack guide device includes a rack guide, a blocking member, a plate spring and a holding member. The rack guide is accommodated in an accommodating portion that is formed in a housing through which a rack shaft is inserted so as to move towards or away from the rack shaft and that supports the rack shaft so that the rack shaft slides in an axial direction thereof. ... Jtekt Corporation

02/25/16 / #20160052537

Steering device

In a steering device, a restriction member urged by an urging member restricts rotation of an inner tube when the restriction member is at an inserted position at which the restriction member is inserted into a second opening of the inner tube through a first opening of an outer tube. When the inner tube moves to contract a steering column upon a secondary collision, a driving edge portion of the second opening drives the restriction member to a position at which the restriction member is retracted from the second opening against the urging member.. ... Jtekt Corporation

02/11/16 / #20160040761

Chain continuously variable transmission

When a chain is wound around a pulley, a pin-pulley contact point as a contact point of a pin of the chain with the pulley slides and moves on a conical surface of the pulley. A contact point slip distance, namely the distance by which the pin-pulley contact point moves on the conical surface at this time, is associated with an offset. ... Jtekt Corporation

02/11/16 / #20160040730

Clutch unit assembly method

A clutch unit includes a one-way clutch including a plurality of engaging elements which restrict relative rotation of an outside rotating body toward one side of a circumferential direction relative to an inside rotating body by engagement with the outside rotating body and which allow relative rotation toward the other side of the circumferential direction by releasing the engagement. An assembly method for this clutch unit includes: a first step of mounting an engaging member including the engaging elements to the inside rotating body; and a second step of mounting, after the first step, the outside rotating body to a radial outside of the engaging elements while the outside rotating body is rotated relative to the inside rotating body toward the other side of the circumferential direction.. ... Jtekt Corporation

02/11/16 / #20160040729

Power generation device and one-way clutch structure

A one-way clutch structure includes: a pair of clutch members disposed between an output shaft and a drive shaft so as to oppose each other in an axial direction; and an engagement element interposed between these clutch members. When a rotation speed of the output shaft exceeds a rotation speed of the drive shaft, the engagement element engages with the clutch portion to connect the output shaft and the drive shaft so as to be integrally rotatable. ... Jtekt Corporation

02/11/16 / #20160040718

Tapered roller bearing

A tapered roller bearing includes: an inner ring; an outer ring; a plurality of tapered rollers having a roller large end face that is a convex curved surface; and an annular cage that holds the tapered rollers at intervals along a circumferential direction. The inner ring includes a large rib portion having a rib surface that is a concave curved surface and that contacts the roller large end face. ... Jtekt Corporation

02/11/16 / #20160039403

Device and method for controlling limited slip differential

In a control device for a limited slip differential that limits a differential operation of front and rear wheels of a four-wheel-drive vehicle having mounted thereon a vehicle behavior control device that controls a braking force, an ecu that controls a torque coupling as the limited slip differential includes: a differential limiting force calculating device that calculates target torque of the torque coupling based on a vehicle traveling state; a differential limiting force correcting device that makes a correction to reduce the target torque based on a command from the vehicle behavior control device; and a thermal load calculating device that calculates a thermal load of the torque coupling. The differential limiting force correcting device limits the correction of the target torque based on the command from the vehicle behavior control device, when the thermal load of the torque coupling is equal to or larger than a predetermined value.. ... Jtekt Corporation

02/04/16 / #20160033019

Ball screw apparatus

In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. ... Jtekt Corporation

02/04/16 / #20160033018

Ball screw apparatus

A ball screw apparatus includes a ball nut through which a ball screw shaft is inserted. A recessed portion is formed in an inner periphery of the ball nut and is recessed so as to extend in a tangential direction of a ball track. ... Jtekt Corporation

02/04/16 / #20160032984

Tripod constant velocity joint

A tripod constant velocity joint includes, an outer race, a tripod, an inside member, a plurality of rolling elements, and a holding member. The inside member includes a fitted part having a non-cylindrical outer peripheral surface, the holding member includes a fitting part that has a non-cylindrical inner peripheral surface and is fitted to the fitted part, and the holding member is unable to rotate relative to the inside member as the fitted part and the fitting part are fitted to each other.. ... Jtekt Corporation

02/04/16 / #20160032972

Roller bearing

A cage includes a pair of annular rings and a plurality of cage bars, and an area enclosed by the pair of annular rings and the circumferentially adjacent cage bars that serves as a pocket that holds the roller. The cage further includes a tab provided so as to protrude from a radially outer area of the cage bars to prevent the roller in the pocket from slipping out through the pocket toward a radially outer side. ... Jtekt Corporation

02/04/16 / #20160032899

One-way clutch for wind power generation device, and wind power generation device

A one-way clutch includes: an inner ring; an outer ring forming a plurality of wedge-shaped spaces together with the inner ring; and a plurality of rollers respectively disposed in the wedge-shaped spaces, and integrally rotatably connects an output shaft of a speed-up gear and an input shaft of a power generator to each other by engagement of the rollers with an outer circumferential surface of the inner ring and an inner circumferential surface of the outer ring, and breaks the connection by releasing the engagement. A relationship of 1.1<θb/θa<1.4 is satisfied, where θa represents a wedge angle of the wedge-shaped spaces obtained when a load torque is applied at an initial stage of the engagement of the rollers, and θb represents a wedge angle obtained when a maximum load torque is applied.. ... Jtekt Corporation

01/28/16 / #20160025141

Rolling bearing apparatus and lubrication unit

A lubrication unit in a rolling bearing apparatus includes a pump that supplies a lubricant to an annular space formed between an inner ring and an outer ring, and is provided adjacently to the annular space. The pump includes a needle-like nozzle having, at a tip thereof, a discharge port through which the lubricant is discharged toward an outer ring raceway groove in an outer ring. ... Jtekt Corporation

01/28/16 / #20160025139

Rolling bearing apparatus and lubrication unit

A rolling bearing apparatus includes a bearing portion with an inner ring and an outer ring, and a lubrication unit provided adjacently to an annular space formed between the inner ring and the outer ring. The lubrication unit has a tank in which a lubricant to be supplied to the annular space is stored and which enables the lubricant to flow out through a lower part of the tank. ... Jtekt Corporation

01/28/16 / #20160025138

Rolling bearing apparatus and lubrication unit

A rolling bearing apparatus includes: a bearing portion with an inner ring, an outer ring, balls, and a cage; and a lubrication unit provided adjacently to an annular space formed between the inner ring and the outer ring. The lubrication unit apparatus includes a pump that supplies a lubricant to the annular space and a tank in which a lubricant is stored. ... Jtekt Corporation

01/28/16 / #20160025137

Rolling bearing apparatus and lubrication unit

A rolling bearing apparatus includes a lubrication unit provided adjacently to an annular space formed between an inner ring and an outer ring. The lubrication unit includes a tank that stores a lubricant to be supplied to an annular space and that has an outlet portion through which the lubricant flows out. ... Jtekt Corporation

01/28/16 / #20160025092

Electric pump unit

An electric pump unit is provided that ensures capability for lubricating a plain bearing and in which a lubricating oil passage is formed with a simple structure. This pump unit includes: a pump in which a rotor placed in a pump chamber of a pump housing rotates; and an electric motor having a motor shaft coupled to the rotor. ... Jtekt Corporation

01/28/16 / #20160025073

Shaft coupling device and wind power generation device

A shaft coupling device integrally rotatably connects an output shaft of a speed-up gear and an input shaft of a power generator to each other in a wind power generation device. The shaft coupling device includes a one-way clutch which is disposed between an inside rotating body and an outside rotating body along a radial direction, which integrally rotatably connects the inside rotating body and the outside rotating body to each other in a state in which a rotational speed of the output shaft exceeds a rotational speed of the input shaft, and breaks connection between the inside rotating body and the outside rotating body in a state in which the rotational speed of the output shaft is lower than the rotational speed of the input shaft.. ... Jtekt Corporation

01/28/16 / #20160023550

Four-wheel drive vehicle and method for controlling four-wheel drive vehicle

A four-wheel drive vehicle are provided which enable enhancement of responsiveness to switching from a two-wheel drive state to a four-wheel drive state. A four-wheel drive vehicle includes a driving force transmission and cut-off apparatus that enables cut-off of transmission of a driving force from an engine to a propeller shaft, a driving shaft that rotates under a tuning force of the propeller shaft, a pair of hydraulic clutches and each disposed between the driving shaft and a corresponding one of rear wheels, and a control apparatus that controls a hydraulic unit that supplies hydraulic oil to the hydraulic clutches. ... Jtekt Corporation

01/21/16 / #20160017935

Clutch unit and wind power generation device

A one-way clutch includes: a plurality of engaging elements which restrict relative rotation toward the other side of a circumferential direction by engagement with an inner ring outer circumferential surface and an outer ring inner circumferential surface and which allows the relative rotation along the other side of the circumferential direction by releasing the engagement; and a ring-shaped cage which holds the engaging elements. In a clutch unit, a positioning member which is capable of contact a side surface of the cage in an axial direction and which positions the cage along the axial direction is provided between the one-way clutch and a rolling bearing.. ... Jtekt Corporation

01/21/16 / #20160017934

One-way clutch and one-way clutch unit for wind power generation device

A one-way clutch, disposed between an input rotating body and an output rotating body, is used to connect the input and output rotating bodies so that the rotating bodies are rotatable integrally in a state in which the rotation speed of the input rotating body is higher than that of the output rotating body and to cut off the connection between the input and output rotating bodies in a state in which the rotation speed of the input rotating body is lower than that of the output rotating body. A plurality of engaging elements or an inner ring and an outer ring constituting the one-way clutch are made of a base material obtained by subjecting a martensitic stainless steel material to soft nitriding treatment, and the vickers hardness of the portion up to 20 μm from the surface of the contact portion thereof is 1000 to 1500 hv.. ... Jtekt Corporation

01/21/16 / #20160017923

Ball bearing

A ball bearing includes: an inner ring having an inner ring raceway surface on its outer circumference; an outer ring having an outer ring raceway surface on its inner circumference; a plurality of balls are disposed between the inner and outer ring raceway surfaces; and a cage. In the outer circumference of the inner ring, an inner ring shoulder portion is provided on a first axial side of the inner ring and a counter bore is provided on a second axial side of the inner ring. ... Jtekt Corporation

01/21/16 / #20160016368

Gear and manufacturing method thereof

In a manufacturing method, an annular preform made of reinforcing fibers is set in a region of a mold which corresponds to a sleeve. In this state, this region of the mold and a region of the mold which corresponds to a tooth portion are filled with a resin. ... Jtekt Corporation

01/14/16 / #20160010740

Worm speed reducer and electric power steering system using the same

A worm speed reducer includes a worm wheel that has an outer peripheral surface having a tooth portion formed therein, a worm shaft, and a biasing member. The worm shaft has a meshing portion that meshes with the tooth portion between a first end located adjacent to the electric motor and a second end located on the opposite side. ... Jtekt Corporation

01/14/16 / #20160010692

Seal and cover

A seal seals a bearing internal space in a bearing apparatus for a vehicle. The seal includes a core and a first elastic member attached to the core. ... Jtekt Corporation

01/14/16 / #20160010629

Wind power generation device

A one-way clutch used in a wind power generation device integrally rotatably connects an input rotating body and an output rotating body to each other in a state in which a rotational speed of the input rotating body exceeds a rotational speed of the output rotating body, and breaks connection between the input rotating body and the output rotating body in a state in which the rotational speed of the input rotating body is lower than the rotational speed of the output rotating body. The input rotating body and the output rotating body are allowed to relatively move along an axial direction, and a maximum allowance of movement is set to be larger than variation of a distance along the axial direction between an input shaft and an output shaft caused by state change.. ... Jtekt Corporation

01/14/16 / #20160009313

Electric power steering system

An electric power steering system includes an electric motor and a worm speed reducer. The worm speed reducer includes a worm shaft, a worm wheel, and a ring member. ... Jtekt Corporation

01/14/16 / #20160009129

Hub unit

A hub unit includes an outer ring member and an inner ring member disposed inward of the outer ring member and coaxially with the outer ring member. The inner ring member is provided with a wheel attachment flange. ... Jtekt Corporation

01/14/16 / #20160008207

Care support apparatus

A care support apparatus includes a lateral pair of leg links held by a main body. The leg links include first links provided with first wheels at respective one ends of the first links, and second links provided with second wheels at respective one ends of the second links and rotatably coupled to the first links. ... Jtekt Corporation

01/07/16 / #20160003306

Cross shaft joint and steering device for vehicle using the same

A cross shaft joint includes a cross shaft including four shaft parts, needle rollers rolling on outer peripheral faces of the shaft parts, bearing cups each having a cylindrical part, and a bottom part, and externally fitted to the shaft parts via the needle rollers, and yokes provided with bearing holes into which the bearing cups are inserted. The needle rollers are maintained in a tight fit state between the shaft parts and the bearing cups. ... Jtekt Corporation

01/07/16 / #20160001500

Method for manufacturing rack housing and rack housing

Two laminating sheets each formed by laminating a carbon fiber sheet and a film of a thermoplastic resin are set on heating in an area of a mold corresponding to a tubular portion of a rack housing. The mold is clamped, the carbon fiber sheet is impregnated with the thermoplastic resin of the film, each of the two laminating sheets is pressed into a shape with a half tube corresponding to a half circumference of the tubular portion and connection portions at both ends of the half tube in a circumferential direction, and two half tubes are bonded together at the connection portions thereof to form the tubular portion.. ... Jtekt Corporation








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