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Jtekt Corporation patents


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


Sealing device

A sealing device includes a conductive member integrated with a seal lip along a circumferential direction of the seal lip and configured such that a voltage is applied to the conductive member, and a reference member provided at a predetermined interval with respect to the conductive member. A deformation degree of the seal lip is inspected such that a change of an inductance of the conductive member associated with a change of the interval between the conductive member and the reference member is detected by a detection unit.. ... Jtekt Corporation

Rolling bearing

A rolling bearing includes a seal device provided at an axial end portion of an annular space formed between an inner ring and an outer ring. The seal device has a seal body portion attached to the outer ring, and a seal lip provided so as to extend from the seal body portion toward the inner ring and configured to contact a seal surface of the inner ring. ... Jtekt Corporation

Rolling bearing

A rolling bearing includes an inner ring, an outer ring, a plurality of balls, a cage, and sealing devices. An action that forces grease from one axial side to the other axial side occurs in an annular space. ... Jtekt Corporation

Method for manufacturing a plug in two parts for a steering gearbox

A plug including a hub which extends along a central axis and is defined radially by a side wall wherein an annular groove is formed, which receives a sealing member, the groove provided between a bottom wall and first annular edge wall, and a second annular edge wall, which axially define the groove, the hub being formed by the combination of a first hub section on which the first edge wall is formed, and a second hub section on which the second edge wall is formed, the first hub section and the second hub section being assembled so that they meet at a gasket face which is secant to the central axis and the bottom wall of the groove, so the line of the intersection of the gasket face with the bottom wall is contained axially between the first and second edge wall over the entire perimeter of the groove.. . ... Jtekt Corporation

Assist device

An assist device includes a body wearing unit and an actuator unit. The actuator unit includes an output link configured to pivot about a joint of an assist target body part and to be attached to the assist target body part; an actuator including an output shaft configured to generate an assist torque via the output link; a torque determination unit configured to determine a combined torque obtained by combining a user torque and the assist torque from the output shaft, the user torque being input from the output link when the user causes the assist target body part to pivot; a correction unit configured to calculate a correction amount for the determined combined torque; and a pivot angle control unit configured to control a pivot angle of the output shaft based on the determined combined torque and the calculated correction amount.. ... Jtekt Corporation

Assist device

An assist device includes a body wearing unit and an actuator unit. The body wearing unit includes a waist wearing portion configured to be worn around a waist of a user, an upper half body wearing portion configured to be worn at a position in an upper half of a body of the user, and a frame portion connecting the waist wearing portion and the upper half body wearing portion to each other. ... Jtekt Corporation

Method for manufacturing worm reducer, worm reducer, and electric power steering system

In a worm reducer, an elastic member urges a worm shaft housed in a housing toward a worm wheel. In a method for manufacturing the worm reducer, the elastic member is arranged in a recess formed on the inner face of the housing. ... Jtekt Corporation

Resin pellet, resin pellet manufacturing method, and molded article manufacturing method

Carbodiimide is added to a molten aromatic polyamide resin so as to provide resin pellets. The percentage of residual unreacted carbodiimide to each resin pellet is 0.03% to 0.33% by mass.. ... Jtekt Corporation

Method of assembling tapered roller bearing, and jig for use in the method

A cage assembly is moved in the axial direction to approach an inner ring from a small rib portion side. An inner ring assembly is constituted by causing tapered rollers of the cage assembly to climb over a small rib portion to be fitted on an inner raceway surface, and then is assembled to an outer ring. ... Jtekt Corporation

Attitude control system

An object is to provide an attitude control system that can suppress an understeering characteristic when a vehicle such as an automobile travels in a medium-speed or low-speed range. A vehicle drives front wheels, and controls steering angles of the front wheels and steering angles of rear wheels. ... Jtekt Corporation

Machining apparatus

A machining apparatus machines an end face of a tapered roller with a grinding wheel. The machining apparatus includes a support mechanism configured to support the tapered roller, a wheel unit on which the grinding wheel is mounted, and a base configured to support the wheel unit so that the wheel unit is swivelable about a center line in a vertical direction. ... Jtekt Corporation

Inverter circuit, motor controller, and power steering system

When supply of electric power to an inverter using a normally-on switching element is abnormally stopped, a flow of a current to the switching element of the inverter is reduced. An inverter circuit includes an inverter having at least one arm including two normally-on switching elements connected in series between two lines to which a voltage of a power supply is applied, a smoothing capacitor connected between the two lines at a position between the power supply and the inverter, and a normally-off relay connected into the first line out of the two lines at a position between the smoothing capacitor and the inverter.. ... Jtekt Corporation

Driving power transmission device

A driving power transmission device includes a fluid pressure type clutch device that transmits driving power between two shaft members, and a pump that supplies a fluid to the clutch device. The pump includes a pump that makes a pressure of sucked fluid high; a first flow passage through which the fluid according to a pressure discharged from the pump is supplied to the clutch device during a driving of the pump; a second flow passage through which the fluid discharged from the pump is held during a stop of the pump and a pressing force is applied to the clutch device by the fluid to be held; and a switching valve that is switchable between a normal mode where a discharge port of the pump communicates with the first flow passage and a locking mode where the discharge port of the pump communicates with the second flow passage.. ... Jtekt Corporation

State detector for roller bearing and roller bearing device

The invention includes a sensor mounted in a through-hole formed in the center of a roller of a roller bearing device, a recording device that records detection signals from the sensors, and an installation jig for installing the recording device in the roller. The installation jig passes through the through-hole, and has a first engagement portion that engages with one axial end portion of the roller from an outer side in an axial direction, and a second engagement portion that engages with the other axial end portion of the roller from the outer side in the axial direction.. ... Jtekt Corporation

08/16/18 / #20180229760

Power steering device with sealed protective casing

A power-steering device intended to be fitted on a vehicle-receiving structure, such as a cradle, the device including a rack as well as at least one actuator subassembly including at least one assistance motor, one drive gear, as well as one load-bearing structure that carries the assistance motor and is arranged to support and guide the drive gear and the rack relative to one another, the device further including one containment casing that is separate from the actuator subassembly and is fonned by connecting at least one base and one bell housing, which are attached to one another by a sealed joint such that the containment casing prevents the actuator subassembly from being exposed to water splashes, dust and salt spray from the outside environment when the power-steering device is in place on the receiving structure of the vehicle.. . ... Jtekt Corporation

08/16/18 / #20180229758

Steering apparatus

A first sliding member is held by an upper jacket. A second sliding member includes a fixed portion fixed to the first sliding member, and an extension portion that extends in a column axis direction and that has a coupled portion coupled to the fixed portion at a predetermined location in the column axis direction. ... Jtekt Corporation

08/16/18 / #20180229757

Steering system

Provided is a steering system that is configured to absorb a secondary collision shock load and achieves high vibration rigidity with a simple structure. A lower jacket is externally fitted to an upper jacket in a slidable manner. ... Jtekt Corporation

08/09/18 / #20180223977

Driving force distribution apparatus

A driving force distribution apparatus includes a driving force connecting/disconnecting mechanism between a pinion gear shaft and an intermediate rotational member, a first driving force adjustment mechanism between the intermediate rotational member and a second output rotational member, a second driving force adjustment mechanism between the intermediate rotational member and a first output rotational member, and a hydraulic unit configured to generate pressures of hydraulic oil for operating the driving force connecting/disconnecting mechanism and the first and second driving force adjustment mechanisms. The hydraulic unit includes a single hydraulic pump and a hydraulic circuit configured to distribute a pressure of the hydraulic oil, which is discharged from the hydraulic pump, to cylinder chambers of pistons.. ... Jtekt Corporation

08/09/18 / #20180223976

Driving force distribution apparatus

A driving force distribution apparatus includes an orthogonal gear pair constituted by a pinion gear shaft and a ring gear member, a casing that houses the orthogonal gear pair, an intermediate rotational member coaxially rotatable relative to the ring gear member, a clutch member configured to couple the ring gear member and the intermediate rotational member to each other, and first and second driving force adjustment mechanisms configured to adjust a driving force to be transmitted from the intermediate rotational member to first and second output rotational members. The ring gear member has a ring gear portion and a tubular portion. ... Jtekt Corporation

08/09/18 / #20180223906

Ball bearing

A cage of a ball bearing includes an annular portion located on a first axial side with respect to balls, the first axial side being one side in an axial direction of the ball bearing, and cage bars extending from the annular portion toward a second axial side, the second axial side being the other side in the axial direction of the ball bearing. A space located on a second axial side of the annular portion and defined between any two of the cage bars adjacent to each other in a circumferential direction serves as a pocket that accommodates a corresponding one of the balls. ... Jtekt Corporation

08/09/18 / #20180223819

Bearing device

A bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls interposed between the inner ring and the outer ring, and a cage that holds the balls; and an oil supply unit provided adjacent to the bearing portion in the axial direction. The oil supply unit has a pump that discharges a minute amount of lubricating oil to the bearing portion, and varies the amount of oil supplied to the bearing portion by discharge of lubricating oil from the pump.. ... Jtekt Corporation

08/09/18 / #20180222520

Steering system

There is provided a steering system that can absorb an increased total amount of shock at a time of a secondary collision. A steering member is connected to one end of an upper jacket in a column axial direction. ... Jtekt Corporation

08/09/18 / #20180222316

Control method for four-wheel drive vehicle, control apparatus for four-wheel drive vehicle, and four-wheel drive vehicle

A control apparatus that controls a four-wheel drive vehicle in which a driving force is transmitted to rear wheels via a dog clutch, a propeller shaft, and a driving force transmission apparatus is configured to, when switching to a four-wheel drive mode, reduce a difference in rotation speeds of an intermediate rotational member and a ring gear member by a frictional force between a friction surface of a friction member, which is configured such that its rotation relative to the intermediate rotational member is restricted, and a target frictional slide surface of the ring gear member, and then couple the intermediate rotational member and the ring gear member by a clutch member in a state in which engagement forces of friction clutches configured to transmit the driving force between each of first and second output rotational members and the intermediate rotational member of the driving force transmission apparatus are set to engagement forces that allow their relative rotation.. . ... Jtekt Corporation

08/09/18 / #20180221976

Gear cutter machining apparatus, gear cutter machining method, tool profile simulation apparatus, and tool profile simulation method

A controller of a gear cutter machining apparatus includes a rotation control unit and a movement control unit. The rotation control unit rotates a gear cutter about a central axis of the gear cutter, and rotates a grinding wheel about a central axis of the grinding wheel. ... Jtekt Corporation

08/02/18 / #20180218959

Semiconductor device

An electrode surface of a horizontal semiconductor chip and a substrate are joined together through a plurality of first joint portions including a plurality of joint portions at which a plurality of electrodes formed on the electrode surface are joined to the substrate. A no-electrode surface of the horizontal semiconductor chip and a heatsink are joined together through a second joint portion at which the no-electrode surface and the heatsink are joined together. ... Jtekt Corporation

08/02/18 / #20180216670

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

07/26/18 / #20180208234

Power steering device with a remote computer under the rack

The invention relates to a vehicle (2) provided with a power-steering device (1) which includes at least one steering rack (3) and an assistance motor (4) arranged to drive said steering rack (3), as well as at least one on-board computer (13) inside the vehicle (2), intended for controlling said assistance motor (4), the computer (13) being placed mostly, and preferably entirely, below the rack (3), preferably in a shell (20), inside of which the rack (3) is translatably guided, and inside of which a space for the computer is arranged for said purpose.. . ... Jtekt Corporation

07/26/18 / #20180207730

Cutting method and cutting apparatus

A method for cutting an inner circumferential surface of a rotating hollow cylindrical workpiece includes: holding the workpiece with a chucking device such that a side surface of the workpiece on a first side in an axial direction of the workpiece is in contact with a contact surface of the chucking device; setting an intersection angle between a rotational center line of the workpiece and an imaginary straight line to an angle smaller than 45 degrees, the straight line being parallel to an axis line of a button tip and intersecting with the rotational center line; and setting a feed direction of the button tip to the inner circumferential surface to a direction from a second side in the axial direction of the workpiece toward the first side in the axial direction thereof, and cutting the inner circumferential surface by use of the button tip rotating about the axis line.. . ... Jtekt Corporation

07/19/18 / #20180201298

Steer-by-wire steering system

The steer-by-wire steering system comprise a steering input device and a steering operation device that steers wheels which are mechanically coupleable. The steering input device includes a steering-side motor that supplies a steering shaft with a steering reaction force, the steering operation device includes a steered-side motor that supplies a rack shaft with a steering force, and a power supply control circuit that controls the steering-side motor to generate the steering reaction force and that controls the steered-side motor to generate the steering force. ... Jtekt Corporation

07/19/18 / #20180201297

Dashboard gasket for coupling a power steering device to the dashboard of a vehicle

A vehicle fitted with a steering device including a steering mechanism protected by a steering casing, the steering casing itself being housed in an engine compartment that is separated from the interior of the vehicle by a dashboard, the steering device also including a steering wheel, located in the interior, and to which the steering mechanism is connected by a steering column that extends out of the steering casing and passes through the dashboard, the vehicle including, in order to provide a seal around the steering column, between the steering casing and the dashboard, an elastomeric coupling gasket including, in a single piece, a central first sealing ring that surrounds and clamps around the steering column and a peripheral second sealing ring that is inserted between the steering casing and the dashboard, at a distance from and around the first sealing ring.. . ... Jtekt Corporation

07/12/18 / #20180195590

Ball screw device and steering system including ball screw device

There provides a ceiling surface of a deflector which secures an allowance for engagement between a rolling ball and a retainer. A ball screw device includes a ball screw shaft, a ball nut, a deflector forming a coupling passage, a rolling ball, and a retainer. ... Jtekt Corporation

07/12/18 / #20180193978

Grinding apparatus and grinding method

A grinding apparatus grinds a workpiece by rotating the workpiece held by main spindles and a grinding wheel held by a wheel spindle, and by relatively moving the grinding wheel toward and away from the workpiece. The grinding apparatus includes a first detection unit that detects a rotational phase of the workpiece; a second detection unit that detects a grinding resistance moment at a grinding point between the grinding wheel and the workpiece, or detects a drive current of a rotary drive unit of the workpiece or a rotary drive unit of the grinding wheel; a storage unit that stores the grinding resistance moment or the drive current in a manner associated with the rotational phase; and a determination unit that determines a slip between the workpiece and the main spindles based on the grinding resistance moment or the drive current at a current rotational phase, and on the grinding resistance moment or the drive current at the same phase as the current rotational phase of a previous time.. ... Jtekt Corporation

07/12/18 / #20180193976

Grinding apparatus and grinding method

A grinding apparatus includes grinding wheel side vibrational displacement calculation devices that obtain a vibrational displacement of a grinding wheel resulting from a vibration in an approaching/separating direction of the grinding wheel; main spindle side vibrational displacement calculation devices that obtain a vibrational displacement of a workpiece generated by propagation of the vibration in the approaching/separating direction of the grinding wheel; a relative vibrational displacement calculation unit that obtains a relative vibrational displacement between the grinding wheel and the workpiece based on the vibrational displacement of the grinding wheel and the vibrational displacement of the workpiece that have been obtained; a position change unit that creates, based on the obtained relative vibrational displacement between the grinding wheel and the workpiece, a position change command to change a position of the wheel spindle stock; and a processing controller that grinds the workpiece w based on the created position change command.. . ... Jtekt Corporation

06/28/18 / #20180181087

Analysis device and analysis system

While a production apparatus is operating, a computation unit of an analysis device performs main predictive computation on an acceptability in real time by using one or more operating predictors selected from among a plurality of predictors. When the main predictive computation is not performed, the computation unit performs subsidiary predictive computation on the acceptability by using one or more subsidiary predictors that are not selected from among the plurality of predictors. ... Jtekt Corporation

06/28/18 / #20180180099

Tapered roller bearing

A tapered roller bearing includes an outer ring having a first raceway surface, an inner ring having a second raceway surface, plural tapered rollers disposed between the first and second raceway surfaces, and a lubricating oil holding member fixed to an end portion of the outer ring. The lubricating oil holding member includes a tubular portion, an annular portion, and a projecting portion. ... Jtekt Corporation

06/28/18 / #20180180092

Tapered roller bearing

In a tapered roller bearing, a large rib is provided at one end of an inner ring in the axial direction, and projects radially outward. A lubricating oil holding member is integrated with an outer ring, and disposed at a position overlapping the large rib in the radial direction. ... Jtekt Corporation

06/28/18 / #20180179380

Resin composition and insert molded product

A resin composition includes a polyamide resin, an elastomer having a carboxyl moiety, a carbodiimide group, and reinforcing fibers whose surfaces are treated with an aminosilane coupling agent. An insert molded product includes a metal insert member, and a resin part having the resin composition fixed to a surface of the insert member.. ... Jtekt Corporation

06/28/18 / #20180178835

Steering control apparatus

A steering ecu includes a plurality of microcomputers to control a motor. A main communication line for communicating a main command value and a subsidiary communication line for communicating a subsidiary command value are connected to each of the microcomputers. ... Jtekt Corporation

06/28/18 / #20180178834

Vehicle steering system

A target motor torque setter includes an automatic steering deactivating controller to change a control mode from an automatic steering mode to a manual steering mode in accordance with an intervening operation resulting from a steering operation performed by a driver during the automatic steering mode. The automatic steering deactivating controller determines whether a transition control start requirement is satisfied and starts transition control upon determining that the transition control start requirement is satisfied. ... Jtekt Corporation

06/28/18 / #20180178831

Steering control apparatus

A steering ecu includes a plurality of microcomputers configured to control driving of a motor so that an assist force is applied to a steering mechanism. A main communication line for communicating a main command value and a subsidiary communication line for communicating a subsidiary command value are connected to each of the microcomputers. ... Jtekt Corporation

06/28/18 / #20180178826

Steering system

A second toothed member is configured to change its position between a meshing position where first teeth mesh with second teeth and a meshing releasing position where the first teeth do not mesh with the second teeth. A first toothed member and a facing member move together with an upper jacket. ... Jtekt Corporation

06/28/18 / #20180178301

Machine tool

A machine tool includes a bed, a column, a rotary main spindle, a tool magazine, a tool changer, and a controller. The tool changer includes a body provided on the bed so as to be movable in a direction orthogonal to a movement direction of the column, a changing arm rotatably provided on the body, and a door provided on the body to open or close an opening formed in the body, and configured to partition an area on the column side from an area on the tool magazine side by closing the opening. ... Jtekt Corporation

06/14/18 / #20180165955

Optical detection device and facility management system

An optical detection device includes: an optical sensor configured to detect light from a light source of an indication lamp; an optical-detection-side communication unit configured to wirelessly transmit at least an optical detection signal of the optical sensor; and a photoelectric conversion unit configured to convert light from the light source into power and to store the power. The optical sensor and the optical-detection-side communication unit operate using the power stored in the photoelectric conversion unit.. ... Jtekt Corporation

06/14/18 / #20180163786

Rolling bearing

A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. A first seal is provided on one side of the annular space between the inner ring and the outer ring in the axial direction and has a first lip portion that forms a first labyrinth clearance with the inner ring to prevent spill of the grease. ... Jtekt Corporation

05/31/18 / #20180152011

Wiring harness fixing structure

Provided is a wiring harness fixing structure that prevents a wiring harness from projecting outward from an opening of a trough-shaped holding member attached and fixed to an attachment object. A wiring harness fixing structure includes a holding member that is formed into a trough shape with an opening provided on one face and is configured to hold a part or all of a wiring harness, and an attachment fitting configured to attach and fix the holding member to a housing. ... Jtekt Corporation

05/31/18 / #20180149245

Ball screw device and steering system including ball screw device

Provided is a ball screw device in which a deflector can securely be prevented from falling into a nut when the deflector is attached. A ball screw device includes a ball screw shaft, a nut, rolling elements, a ball recirculation path, and a deflector. ... Jtekt Corporation

05/31/18 / #20180149202

Rolling bearing device

A rolling bearing device includes a bearing portion and an oil supply unit provided adjacent, in the axial direction, to an annular space between an inner ring and an outer ring of the bearing portion to supply lubricating oil to the annular space. The oil supply unit includes an oil chamber that accommodates lubricating oil, a nozzle that discharges lubricating oil in the oil chamber, a pump body that applies a discharge force for causing lubricating oil in the oil chamber to fly from the nozzle toward the annular space, and a detection portion that detects gathering of lubricating oil at a discharge port of the nozzle. ... Jtekt Corporation

05/31/18 / #20180149201

Rolling bearing device, oil supply unit, method of supplying lubricating oil, and program

A rolling bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls, and a cage that holds the plurality of balls; and an oil supply unit that supplies lubricating oil to the bearing portion. The oil supply unit has: a pump that discharges the lubricating oil through drive of a piezo element; a voltage boost portion that boosts a voltage to be applied to the piezo element; and a control portion that causes the pump to operate while varying a voltage boost time included in a period since the start of voltage boost by the voltage boost portion until the start of the drive of the piezo element.. ... Jtekt Corporation

05/31/18 / #20180149200

Rolling bearing device and oil supply unit

A rolling bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls interposed between the inner ring and the outer ring, and a cage that holds the plurality of balls; and an oil supply unit provided adjacent to the bearing portion in the axial direction. The oil supply unit has a pump configured to supply lubricating oil to the bearing portion. ... Jtekt Corporation

05/24/18 / #20180143092

Torque detecting apparatus and method for manufacturing the same

A torque detecting apparatus includes an annular magnetic flux collecting ring, a magnetic flux collecting holder surrounding and holding the magnetic flux collecting ring, and a magnetic shield including a circumferential end and attached to the outer periphery of the magnetic flux collecting holder. The magnetic flux collecting holder includes a housing portion that houses in its inner space the circumferential end of the magnetic shield. ... Jtekt Corporation

05/24/18 / #20180142765

Planetary roller speed changer

An axial end of an output shaft facing toward an input shaft has a first hole that is concentric with the output shaft and that axially extends to a predetermined depth. An axial end of the input shaft facing toward the output shaft has a second hole that is concentric with the input shaft and that axially extends to a predetermined depth. ... Jtekt Corporation

05/17/18 / #20180135693

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and an annular cage that holds the tapered rollers. The cage has a small annular portion positioned on one side, in the axial direction, of the tapered rollers, a large annular portion positioned on the other side, in the axial direction, of the tapered rollers, and a plurality of cage bars that couple the small annular portion and the large annular portion to each other. ... Jtekt Corporation

05/17/18 / #20180134309

Use of a phase-lead filter to separate the manual steering setting from the power steering control stability setting

A method for controlling a power steering device including a steering assist motor and a steering wheel. In the method, a steering wheel torque setpoint is generated, the actual steering wheel torque actually exerted by the driver on the steering wheel is measured, the difference, the so-called “steering wheel torque error”, between the steering wheel torque setpoint and the actual steering wheel torque is determined, then a motor torque setpoint for the steering assist motor is generated from a first filtered proportional component on one hand, obtained by filtering via a phase-lead filter the steering wheel torque error weighted by a first assist gain, and from a second derivative return component on the other hand, obtained by calculating the time derivative of the actual steering wheel torque and weighting the derivative by means of a second derivative gain.. ... Jtekt Corporation

05/17/18 / #20180134152

Drive force control device and method of controlling vehicle

A drive force control device, which controls a drive force distribution device that distributes a drive force to right and left rear wheels at variable distribution ratios, computes a steering angle-based turning radius determined in accordance with a steering angle, computes a limit turning radius, which is a minimum value of the turning radius with which the vehicle is turnable while keeping a stable travel state, in accordance with a vehicle speed, sets the larger one of the steering angle-based turning radius and the limit turning radius as a target turning radius, computes target rotational speeds for the right and left rear wheels on the basis of the target turning radius and the vehicle speed, and adjusts the ratios of distribution of the drive force to the right and left rear wheels such that actual rotational speeds of the right and left rear wheels approximate the target rotational speeds.. . ... Jtekt Corporation

05/10/18 / #20180128358

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

05/10/18 / #20180128316

Tapered roller bearing and power transmission device

A tapered roller bearing includes an inner ring with a large rib, an outer ring, and multiple tapered rollers. Each of the tapered rollers has, at its axial end, a large end face that is a convex surface. ... Jtekt Corporation

05/10/18 / #20180127019

Steering system

Provided is a steering system in which an elastic support portion is prevented from falling off a subassembly. A steering system includes a ball nut, a driven pulley provided on the ball nut so as to be rotatable together with the ball nut, a housing that houses the ball nut and the driven pulley and has a first locking surface and a second locking surface, a bearing including an outer ring provided so as to be movable between the first locking surface and the second locking surface, a first elastic support portion provided between the first locking surface and one end face of the outer ring, a second elastic support portion provided between the second locking surface and the other end face of the outer ring, a retaining member configured to lock the first elastic support portion, and a guide portion configured to lock the second elastic support portion.. ... Jtekt Corporation

05/10/18 / #20180126472

Gear machining device and gear machining method

To provide a gear machining device and a gear machining method which achieve machining of tooth flanks having different torsion angles with high degree of accuracy. In a gear machining device, a side surface of a tooth of a gear includes a first tooth flank and a second tooth flank having a different torsion angle from the first tooth flank, a cutting blade of a machining tool has a blade traces having a torsion angle determined based on a torsion angle of the second tooth flank and an intersection angle between a rotation axis of a workpiece and a rotation axis of the machining tool so as to allow the second tooth flank to be machined on the pre-machined first tooth flank.. ... Jtekt Corporation

05/03/18 / #20180119745

Constant velocity joint

A constant velocity joint includes balls each rollably supported by an associated one of outer ball grooves and an associated one of inner ball grooves facing each other such that the inclined direction of the associated outer ball groove relative to a central axis of an outer joint member is opposite to the inclined direction of the associated inner ball groove relative to a central axis of an inner joint member. The inner joint member includes escape portions to allow escape of the balls from the inner ball grooves to a first side of the central axis of the inner joint member. ... Jtekt Corporation

05/03/18 / #20180118252

Steering system

A rack-parallel steering system that prevents entry of abrasion powder into a rolling bearing is provided. A steering system includes a steered shaft, a rolling element screw portion, a rolling element nut, and a ball screw device. ... Jtekt Corporation

05/03/18 / #20180118220

Vehicle attitude control system

A vehicle attitude control system includes a target sideslip angle calculating unit configured to calculate a target sideslip angle for turning of a vehicle based on a steering angle and a vehicle speed, and a target sideslip angle correcting unit configured to correct the target sideslip angle calculated by the target sideslip angle calculating unit by using a sideslip angle correction amount calculated based on at least one selected from a torque of an axle and an injection amount of fuel supplied to an engine. The attitude of the vehicle is controlled by using a target sideslip angle obtained through the correction performed by the target sideslip angle correcting unit.. ... Jtekt Corporation

04/12/18 / #20180100566

Ball screw device, method of manufacturing ball screw device, and steering system

Provided are a low-cost ball screw device having a low-cost deflector, wherein the deflector is formable by simple machining, is easy to handle after being machined, and thus is easy to store and mount to another component. A ball screw device includes a screw shaft, a nut, rolling elements, and deflectors. ... Jtekt Corporation

04/12/18 / #20180099692

Steering assist apparatus

A second target steered angle setter includes: a first multiplier configured to, when the vehicle is making a right turn, reduce a base target steered angle correction amount so as to set the reduced base target steered angle correction amount to be a left target steered angle correction amount, and configured to, in other states, set the base target steered angle correction amount to be the left target steered angle correction amount on an as-is basis; and a second multiplier configured to, when the vehicle is making a left turn, reduce the base target steered angle correction amount so as to set the reduced base target steered angle correction amount to be a right target steered angle correction amount, and configured to, in other states, set the base target steered angle correction amount to be the right target steered angle correction amount on an as-is basis.. . ... Jtekt Corporation

04/12/18 / #20180099690

Vehicle steering device

A left steering ecu includes switching control unit that switches control mode between a first control mode and a second control mode. The first control mode is mode in which the left steering ecu controls left steering motor so that the steered angle of a left steered wheel becomes equal to a left target steered angle received from a higher-level control device. ... Jtekt Corporation

04/12/18 / #20180099563

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

A control apparatus for a four-wheel drive vehicle includes a current detector configured to output a detection signal in accordance with the magnitude of an actual control current, a target current value calculator configured to calculate a target current value that is a target value of the control current, and a current controller configured to control a current output circuit to output the control current having the target current value calculated by the target current value calculator based on a result of detection performed by the current detector. When the four-wheel drive vehicle is in a two-wheel drive mode in which first and second friction clutches are released, the current controller performs zero-point adjustment for adjusting a zero point of the control current to be output from the current output circuit.. ... Jtekt Corporation

04/12/18 / #20180099562

Differential device

In a differential device, a differential case includes a first engaging part having engaging teeth on a first side wall of the differential case. A clutch member is disposed between the first side wall and a second side wall of the differential case in an axial direction. ... Jtekt Corporation

04/05/18 / #20180094715

Power-steering push button having a shock absorber with a conical base

A play take-up device comprising a push button that is movably mounted and translationally guided, along a thrust axis 5, in a housing, to exert a thrust force against a rack, said device further comprising a resilient shock-absorbing member that is positioned between the push button and the housing, in contact, respectively, against a first bearing surface belonging to the push button, which is angled in relation to the thrust axis, and is preferably frusto-conical, and a second bearing surface belonging to the housing, referred to which has, opposite the distribution surface and counter to the resilient shock-absorbing member, both a radially extending component and an axially extending component, such that the shock-absorbing member simultaneously returns the push button axially towards the rack and transversely towards the thrust axis.. . ... Jtekt Corporation

04/05/18 / #20180093707

Vehicle steering system

A vehicle steering system includes a steering operation mechanism configured to steer a steered wheel, and a steering operation motor configured to apply a drive force for steering the steered wheel to the steering operation mechanism. The steering operation mechanism includes an input shaft to which the drive force from the steering operation motor is input, an output shaft configured to output the drive force from the input shaft to the steered wheel, and a coupling mechanism configured to couple the input shaft and the output shaft to each other. ... Jtekt Corporation

04/05/18 / #20180093701

Steering control device

A steering control device includes a controller configured to execute turning processing of controlling a controlled variable to a command value corresponding to an operation of a steering wheel by controlling a turning-side actuator in a cutoff state, the controlled variable being at least one of a turning angle of the steered wheels and a turning angle rate that is a changing rate of the turning angle; and transmission switching processing of controlling a switching device such that the switching device is switched from the cutoff state to a transmission state on condition that an absolute value of a difference between the controlled variable and the command value continues to be equal to or larger than a threshold when the turning processing is executed.. . ... Jtekt Corporation

04/05/18 / #20180093566

Control device for driving force transmission device

A control device mounted on a four-wheel drive vehicle includes: a slip ratio calculating unit that obtains a slip ratio of main driving wheels based at least on wheel speeds; a smoothing unit that smooths the slip ratio by filtering; and a driving force control unit that controls a driving force transmission device so that a driving force that is transmitted to auxiliary driving wheels increases as the slip ratio smoothed by the smoothing unit increases. The smoothing unit uses a larger time constant for the filtering when a vehicle speed is less than a predetermined value than when the vehicle speed is equal to or higher than the predetermined value. ... Jtekt Corporation

04/05/18 / #20180093565

Controller for driving force transmitting apparatus

A controller for a driving force transmitting apparatus mounted in a four-wheel-drive vehicle, includes: a driving force controller configured to calculate a command torque indicating a driving force to be transmitted to the sub-drive wheels via the driving force transmitting apparatus based on a traveling state of the four-wheel-drive vehicle and a road surface condition, and to control the driving force transmitting apparatus based on the command torque; and a road surface condition determiner configured to determine that the road surface condition is a high-μ condition when a duration of a non-slipping state where a vehicle speed is equal to or higher than a prescribed value and a slip ratio of each of both the main drive wheels is lower than a prescribed value has become equal to or longer than a prescribed time.. . ... Jtekt Corporation

04/05/18 / #20180092792

Assistance apparatus

An assistance apparatus includes: a body brace; an output link to be put on an assistance subject body part, the output link pivoting about a joint in the assistance subject body part; an actuator including an output shaft that generates an assistance torque; a torque detection section provided at any position on the way from the output link to the output shaft (of the actuator); torque determination section for determining a combined torque that is a combination of a subject person torque input from the output link as a result of a subject person making the assistance subject body part pivot with the subject person's own strength and the assistance torque from the output shaft; and a controller that controls a rotational angle of the output shaft based on the combined torque.. . ... Jtekt Corporation

03/29/18 / #20180091080

Motor control device

A microcomputer includes a current command value setting unit configured to set a two-phase current command value in a two-phase rotating coordinate system for each of pwm cycles in a current control cycle, and an open-loop control unit configured to calculate a two-phase voltage command value for each of the pwm cycles, according to a motor voltage equation, based on the two-phase current command value for each of the pwm cycles that is set by the current command value setting unit and a rotation speed of an electric motor. The two-phase voltage command value is a command value of voltage that is to be applied to the electric motor.. ... Jtekt Corporation

03/29/18 / #20180087569

Rolling device for vehicle

A rolling device for a vehicle includes an inner raceway member including first and second inner raceways; an outer raceway member including first and second outer raceways; first rolling elements disposed rollably between the first inner raceway and the first outer raceway and second rolling elements disposed rollably between the second inner raceway and the second outer raceway; and grease disposed on raceway surfaces of the first inner raceway, the first outer raceway, the second inner raceway, and the second outer raceway and rolling surfaces of the first rolling elements and the second rolling elements. The grease includes a base oil, a thickener, and additives. ... Jtekt Corporation

03/29/18 / #20180086366

Steering controller

Provided is a steering controller configured to suppress deterioration of the operability of a steering wheel for steering steered wheels even when a driving voltage for a steering system has been decreased. When a clutch is in a disengaged state and steered wheels are steered by a steered-operation actuator while a reaction force is applied to steering wheel by a reaction-force actuator, if a driving voltage for the steered-operation actuator is decreased, a cpu opens relays and stops generation of torque by the steered-operation actuator. ... Jtekt Corporation

03/22/18 / #20180083564

Motor controller

A maximum spectrum peak reduction unit sets a pwm count generated by a pwm duty ratio calculation unit for a specific current control period as pwm counts for respective pwm periods within the current control period, and changes the set pwm counts for the respective pwm periods within the current control period so that a frequency component having a frequency obtained by dividing a carrier frequency in half or less is included in a pwm signal waveform within the current control period without changing a total value of the pwm counts for the respective pwm periods.. . ... Jtekt Corporation

03/22/18 / #20180079448

Steering controller

Provided is a steering controller configured to switch from an interruption state to a transmission state. In a state where power transmission from the steering wheel to steered wheels is interrupted, a maximum value selection processing circuit outputs a maximum value, out of a steered angle and a steering angle, to a limiting reaction force setting processing circuit. ... Jtekt Corporation

03/22/18 / #20180079447

Steering device

A base current command value is calculated based on a steering torque and a vehicle speed. A desired steering angle value is a constant representing the virtual steering limit position. ... Jtekt Corporation

03/22/18 / #20180079301

Four-wheel-drive vehicle control device

A control device is mounted on a four-wheel-drive vehicle, and includes a detector and a vibration suppression controller. The detector detects the occurrence of a vibrating state, in which drive wheels and auxiliary drive wheels slip alternately in a four-wheel-drive state in which a drive force is transferred to the auxiliary drive wheels, or the occurrence of a preliminary state for the vibrating state. ... Jtekt Corporation

03/22/18 / #20180079047

Cutting tool and machining method

A cutting tool includes: a cutting part including a cutting edge having a linear shape; and a fitted part including a fixed section to which the cutting part is fixed, and a fitted part body to be fitted to a cutting device. The cutting edge is located perpendicularly to a virtual line passing through a central axis of the fitted part body, on a plane that is perpendicular to the central axis of the fitted part body. ... Jtekt Corporation

03/15/18 / #20180077825

Electronic control device

An electronic control device includes a heating element, a circuit substrate, a heat radiation plate, and a heat radiation material. Connection terminals of the heating element are fixed to wiring patterns on a circuit principal surface of the circuit substrate with solder. ... Jtekt Corporation

03/15/18 / #20180075780

Training assistance apparatus

A training assistance apparatus includes an actual operation time acquiring unit configured to acquire an actual operation time of an operation that is executed by an operator on a processing machine, a standard time storing unit configured to store a standard time of the operation, and a display unit configured to display the actual operation time and the standard time for comparison.. . ... Jtekt Corporation

03/15/18 / #20180075779

Training assistance apparatus

A training assistance apparatus includes a skilled operation condition acquiring unit configured to acquire an operation condition of a skilled operator on a processing machine in advance, and an unskilled operation condition acquiring unit configured to acquire, when an unskilled operator executes an operation, an operation condition of the unskilled operator so that the operation condition of the unskilled operator is comparable with the operation condition acquired by the skilled operation condition acquiring unit for training of the unskilled operator.. . ... Jtekt Corporation

03/15/18 / #20180073624

Clippable shutter with a deflector skirt for a steering housing

The invention concerns a device for protecting a steering mechanism of a vehicle, said device comprising a housing element defining a chamber of which the wall is perforated with at least one access opening, and a plastic cap that shuts said access opening, said cap having, along the director axis (xx′) thereof, a stepped structure comprising a hub, which is engaged in a bore of the access opening and carries a sealing lining that engages with said bore, then a collar, of which the overall diameter is greater than the diameter of the bore, said collar being engaged by snap-fitting into a stop groove hollowed into the housing element, and forming a baffle deflector of which the diameter is greater than that of the bore.. . ... Jtekt Corporation

03/15/18 / #20180072342

Use of a stepped shrink-fit ring to assemble a steering assist motor in a steering case

An assembly method in which an assembly ring is force-fitted between a first part and a second part such as to create: a tightening contact between the first part and the inner face of the ring, by means of plastic deformation of the ring, said tightening contact occupying a first interference zone; and a tightening contact between the second part and the outer face of the ring, said tightening contact occupying a second interference zone. The assembly ring comprises a first ring segment (t1) and a second ring segment (t2) which are stepped axially in relation to one another and which have different radial dimensions from one another, such as to confine the first interference zone to the first ring segment (t1) and the second interference zone to the second ring segment (t2), in order to prevent the first interference zone and the second interference zone from overlapping axially.. ... Jtekt Corporation

03/08/18 / #20180066699

Hub unit

A hub unit includes an outer ring, an inner shaft, rolling elements and a sealing device. The outer ring includes an outer ring body and an outer ring flange. ... Jtekt Corporation

03/01/18 / #20180057009

Vehicle controller

An ecu includes a deviation calculating circuit an assist control circuit, an automatic steering control circuit including an intervention determination switching circuit, an adder, a current command value calculating circuit the intervention determination switching circuit includes a count amount calculating circuit, an adder, an immediately-preceding count amount output circuit, a switching determination circuit, and an output switching circuit. The count amount calculating circuit calculates a count amount having a positive value or a negative value based on a steering torque absolute value calculated by an absolute value switching circuit. ... Jtekt Corporation

02/15/18 / #20180047152

Appearance inspection apparatus and appearance inspection method

An appearance inspection apparatus radiates light from a light source to a flat inspection surface of an object to be inspected as diffused light with an illumination device, and photographs the inspection surface with a camera. The camera and the light source are arranged in a positional relationship that satisfies θ≠α at any positions on the inspection surface, where θ represents an angle formed between a straight line connecting an arbitrary position on the inspection surface to the camera and a line perpendicular to the inspection surface at that position, and α represents an incident angle of the diffused light.. ... Jtekt Corporation

02/15/18 / #20180045652

Appearance inspection apparatus and appearance inspection method

An appearance inspection apparatus radiates, with an illumination device, light from a light source as diffused light to an inspection surface included in the inner peripheral surface of an inner ring of a rolling bearing that is an object to be inspected, and photographs the inspection surface with a camera. The illumination device is arranged so that at least a part of the illumination device is present in a space surrounded by the inner peripheral surface of the rolling bearing. ... Jtekt Corporation

02/15/18 / #20180045613

Analysis system

An analysis system includes detectors provided in an apparatus, first analysis devices each configured to generate processed data by performing predetermined processing on detection information from each of the detectors, and to evaluate an object to be evaluated based on the detection information from each of the detectors and on an evaluation pattern, and a second analysis device configured to update the evaluation pattern based on the processed data generated by each of the first analysis devices.. . ... Jtekt Corporation

02/15/18 / #20180043928

Motor control device

There is provided a motor control device capable of preventing occurrence of a difference in command value between control systems and reducing torque ripples and noise and vibration of a motor, unlike in a case where a motor is controlled by control systems that are independent from each other. In a motor control device, at least one of parameters for a first control system is shared by both of the systems, and a first control calculation circuit and a second control calculation circuit calculate the assist command values based on the parameter. ... Jtekt Corporation

02/15/18 / #20180043927

Steering apparatus

There is provided a steering apparatus including a fixing mechanism for fixing a driven pulley and a rolling nut to each other, the fixing mechanism configured to suppress at least one of deformation of external teeth of the driven pulley and an increase in size of a housing surrounding the driven pulley. A steering apparatus includes: a steered shaft; a ball screw mechanism including a rolling screw portion, a rolling nut, and rolling elements; a motor; a belt transmission mechanism including a drive pulley, a driven pulley, and a toothed belt; and a fixing mechanism. ... Jtekt Corporation

02/15/18 / #20180043922

Steering system

A ratio of the distance by which a rack shaft moves in a first direction relative to the angle by which a pinion shaft rotates in a circumferential direction is defined as a stroke ratio. The stroke ratio is larger when the pinion meshes with one of a third rack and a fifth rack than when the pinion meshes with a first rack. ... Jtekt Corporation

02/15/18 / #20180043774

Differential unit

A differential unit includes: a differential case; a differential mechanism; a connecting-disconnecting member that connects the differential case to the differential mechanism; an actuator that generates a moving force for moving the connecting-disconnecting member; a moving-force transmitting member that transmits the moving force generated by the actuator to the connecting-disconnecting member; and a wave washer that urges the connecting-disconnecting member in a direction opposite to a direction in which the connecting-disconnecting member is moved by the actuator. The actuator includes a plunger that moves while compressing the wave washer in the axial direction from a first prescribed length using a magnetic force of an electromagnet. ... Jtekt Corporation

02/15/18 / #20180043672

Apparatus and method for manufacturing multilayer electrode

An apparatus includes a control device for a first suction portion, a second suction portion, and a folding portion so that each time a separator is folded, a positive electrode and a negative electrode are alternately sandwiched between folded surfaces of the separator. The control device controls the at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector, the positive electrode, and the negative electrode sucked and held by the at least one of the first suction portion and the second suction portion. ... Jtekt Corporation

02/08/18 / #20180038422

Interrupter and differential

An interrupter includes: an intermittent member having a meshing tooth meshing with a second rotary member, and moving in an axial direction between a coupled position and an uncoupled position; and an actuator making the intermittent member move in the axial direction. The actuator includes: a coil generating magnetic flux; and a plunger moving with the intermittent member in the axial direction. ... Jtekt Corporation

02/08/18 / #20180037256

Actuator control device

The actuator control device includes an assist control circuit for calculating a first assist component and an automatic steering control circuit for calculating a second assist component. The automatic steering control circuit is allowed to calculate the second assist component while a steering torque is less than a first threshold value. ... Jtekt Corporation

02/08/18 / #20180037254

Vehicle steering system

A vehicle steering system includes a clutch provided on a power transmission path extending from a steering wheel to steered wheels, a reactive-force motor connected to a first portion of the power transmission path, which is closer to the steering wheel than the clutch is, a steering motor including a first motor coil and a second motor coil, and connected to a second portion of the power transmission path, which is closer to the steered wheels than the clutch is, a driving circuit configured to supply electric power to the reactive-force motor, a first driving circuit configured to supply electric power to the first motor coil, and a second driving circuit configured to supply electric power to the second motor coil.. . ... Jtekt Corporation

02/01/18 / #20180031034

Combination bearing

Rolling bearings are stacked with their center lines extending in a vertical direction. Each of the rolling bearings has an inner ring, an outer ring, a plurality of balls, and an annular cage. ... Jtekt Corporation

02/01/18 / #20180029638

Torque detection device and electric power steering system

A torque detection device that further suppresses intrusion of foreign matter into a magnetism collection holder. A first magnetism collection holder has a first ring portion and a substrate housing portion. ... Jtekt Corporation

02/01/18 / #20180029634

Torque detection device and electric power steering system

A torque detection device capable of suppressing intrusion of static electricity thereinto. A magnetism collection unit includes magnetism collection rings, first and second magnetism collection holders that hold the magnetism collection rings, respectively, and a magnetic shield that covers the outer peripheries of the magnetism collection rings. ... Jtekt Corporation

02/01/18 / #20180029137

Work holder and work machining method

A work holder includes: a first holding part having three attracting members that are arranged circumferentially apart from each other to attract an axial end face of an annular work; and a second holding part having a contacting member that is held in contact with an inner periphery or outer periphery of the work and restricts radial movement of the work.. . ... Jtekt Corporation

01/18/18 / #20180017149

Worm wheel, electric power steering system, and manufacturing method for worm wheel

A worm wheel includes: a sleeve; and a toothed portion provided by injection molding so as to cover a part of the sleeve, the toothed portion including a first thick portion provided on a first side face, which is a surface of the sleeve on a side closer to an injection-mold gate in an axial direction, and a second thick portion provided on a second side face, which is a surface on an opposite side to the first side face. A central part, in the axial direction, of the outer peripheral surface of the sleeve projects in the radial direction relative to both ends in the axial direction. ... Jtekt Corporation

01/18/18 / #20180017052

Abnormal discharge detection device and abnormal discharge detection method

A pump included in an oil supply unit includes a piezoelectric body that is repeatedly deformed when a pulsed drive voltage is applied from a drive unit. The pump discharges lubricant as the volume of a storage unit that stores fluid to be supplied decreases with deformation of the piezoelectric body. ... Jtekt Corporation

01/18/18 / #20180015946

Steering mechanism control apparatus

A correction circuit receives a steering torque and an electric signal indicative of an operating state of a clutch. The correction circuit selectively uses a first correction value and a second correction value in accordance with the operating state of the clutch. ... Jtekt Corporation

01/11/18 / #20180013334

Motor device

Provided is a motor device that makes the influence of noise more equal between two signal processing circuits. A rotation angle sensor has a bias magnet, a magnetic sensor unit, a first signal processing circuit, and a second signal processing circuit. ... Jtekt Corporation

01/11/18 / #20180010677

Differential apparatus

A differential apparatus includes: a differential mechanism that distributes an input driving force to a pair of side gears so as to allow differential motion therebetween; a differential case that accommodates the differential mechanism; and a clutch mechanism that transmits the driving force between the differential case and pinion shafts of the differential mechanism. The clutch mechanism includes: a slide member that is movable relative to the pinion shafts of the differential mechanism in the axial direction of the differential case and is non-rotatable relative thereto in the differential case; and an actuator that applies an axial moving force to the slide member. ... Jtekt Corporation

01/11/18 / #20180010637

Rolling bearing

A rolling bearing includes a cage constructed by coupling a pair of split members that are split into halves in an axial direction of the rolling bearing. At least one of the split members has an engagement portion that protrudes in the axial direction toward the other one of the split members. ... Jtekt Corporation

01/11/18 / #20180010632

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and an annular cage. The cage has a small annular portion, a large annular portion, and a plurality of cage bars that couples the small annular portion and the large annular portion together. ... Jtekt Corporation

01/11/18 / #20180009463

Steering system

A steering system includes a fastening mechanism that makes an upper jacket fastened to be held by a lower jacket. In a fastened state of the fastening mechanism, a first tooth member on the upper jacket side is meshed with a second tooth member on the lower jacket side. ... Jtekt Corporation

01/04/18 / #20180006522

Electric motor unit and drive unit for vehicle

All electric motor unit includes an electric motor and a connection module. The electric motor includes motor coils, a stator and a rotor. ... Jtekt Corporation

01/04/18 / #20180003229

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers provided in an annular space formed between the inner and outer rings and rolling on an inner raceway surface and an outer raceway surface, and an annular cage that holds the tapered rollers. The cage has a small annular portion positioned toward an axially first side with respect to the tapered rollers, a large annular portion positioned toward an axially second side with respect to the tapered rollers, and a plurality of cage bars that couples the small annular portion and the large annular portion together. ... Jtekt Corporation

01/04/18 / #20180003228

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and an annular cage that holds the tapered rollers. The cage has a small annular portion positioned toward the axially first side with respect to the tapered rollers, a large annular portion positioned toward the axially second side with respect to the tapered rollers, and a plurality of cage bars that couples the small annular portion and the large annular portion together, and the cage is enabled to come into contact with an inner peripheral surface of the outer ring so that the contact allows the cage to be positioned in a radial direction. ... Jtekt Corporation

01/04/18 / #20180001921

Steering device

A column jacket includes an inner jacket and an outer jacket formed with a slit and elastically reducible in diameter. A clamp mechanism causes the outer jacket to clamp the inner jacket so that the inner jacket is unable to move in an axial direction x by clamping a pair of clamp target portions of the outer jacket. ... Jtekt Corporation

01/04/18 / #20180001405

Gear cutting tool, gear machining device, and gear machining method

To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. ... Jtekt Corporation

12/28/17 / #20170372990

Semiconductor device

A semiconductor device includes a semiconductor element, a circuit board, metal wires, and an expanding member. The circuit board has an upper surface and a lower surface opposite the upper surface. ... Jtekt Corporation

12/28/17 / #20170370425

Driving force transmission apparatus

An apparatus case of a driving force transmission apparatus includes a first case member having an accommodating chamber that accommodates a clutch mechanism including a friction clutch, a second case member combined with the first case member to form a storage chamber that stores lubricating oil, and a partition wall member that partitions the accommodating chamber and the storage chamber from each other. The partition wall member is retained by being sandwiched between the first case member and the second case member.. ... Jtekt Corporation

12/28/17 / #20170370411

Taper roller bearing

A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion on the other axial side, and a plurality of column portions. ... Jtekt Corporation

12/28/17 / #20170369095

Steering control device

A steering control device that can more appropriately transmit a road-surface reaction force to a steering wheel is provided. The steering control device feedback controls a steering angle to a target steering angle that is a target value of the steering angle. ... Jtekt Corporation

12/21/17 / #20170366075

Synchronous reluctance motor

A synchronous reluctance motor includes: an annular stator; and a rotor disposed radially inside the stator. The stator includes an annular stator core having in its inner peripheral portion a plurality of slots located at intervals in a circumferential direction of the stator, and slot coils accommodated in the slots. ... Jtekt Corporation

12/21/17 / #20170366073

Electromechanical motor unit

In a driving unit of an electromechanical motor unit, a semiconductor chip and a smoothing capacitor are joined to a second main surface of a substrate having a first main surface and the second main surface. The semiconductor chip includes a first end portion facing the second main surface, and a second end portion on the opposite side of the semiconductor chip from the first end portion. ... Jtekt Corporation

12/21/17 / #20170365997

Overcurrent protection circuit

An overcurrent protection circuit includes an amplifier configured to amplify an inter-terminal voltage of a shunt resistor, an offset application circuit configured to allow the amplifier to provide an output with a predetermined offset voltage additionally applied thereto, a first comparator that compares an output voltage from the amplifier with a predetermined first reference voltage higher than the offset voltage to output a through-current sensing signal when the output voltage from the amplifier is higher than a first reference voltage, and an amplifier failure determination circuit that compares the output voltage from the amplifier with a predetermined second reference voltage that is higher than zero and lower than the offset voltage to output an amplification circuit failure determination signal corresponding to a result of the comparison.. . ... Jtekt Corporation

12/21/17 / #20170363196

Driving force distributing apparatus

A driving force distributing apparatus is configured to distribute a driving force from an engine to right and left wheels in a manner that the driving force is differentially transmittable to the wheels and the transmission of the driving force is interruptible. The apparatus includes: a differential case; a differential gear mechanism including a pair of side gears and a plurality of pinion gears; an intermediate shaft coupled to one of the side gears such that the intermediate shaft is not rotatable relative to this side gear; and a clutch mechanism to transmit a driving force from the intermediate shaft to one of the wheels in a manner that the transmission of the driving force is interruptible. ... Jtekt Corporation

12/14/17 / #20170356500

Rolling bearing, machine element, and solid-film formation method

A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components. ... Jtekt Corporation

12/14/17 / #20170356499

Rolling bearing, rotating machine element, and solid-film formation method

A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a first liquid film (adhesion step). ... Jtekt Corporation

12/14/17 / #20170355395

Steering control apparatus

Using an update amount, an update amount calculating circuit manipulates a phase-control angle so as to perform feedback control such that a steering torque corresponds to a target torque. The steering torque is obtained by reducing a steering torque in magnitude by a predetermined value. ... Jtekt Corporation

12/14/17 / #20170355394

Steering control device

There is provided a steering control device that can control even when a systematic error has occurred. An update amount calculation processing circuit manipulates a control angle in accordance with an update amount in order to control steering torque, which is obtained by subjecting the magnitude of steering torque to a decrease correction by a threshold, to target torque through feedback control. ... Jtekt Corporation

12/14/17 / #20170355392

Steering system

First teeth of a first tooth member that moves together with an upper jacket mesh with second teeth of a second tooth member. The second tooth member includes a received portion received by a receiving surface of a receiving member (energy absorption member). ... Jtekt Corporation

12/14/17 / #20170355051

Driving apparatus and tire-wheel assembly including driving apparatus

A driving apparatus includes an output shaft, a driving motor, and a speed-reducer. The driving motor includes a stator having an annular shape, and a rotor having an annular shape. ... Jtekt Corporation

12/07/17 / #20170353119

Power module

A power module includes a multilayer circuit board, and first and second three-phase inverters, which are mounted on the multilayer circuit board to be stacked each other. A positive-electrode-side power source conductive trace of the first three-phase inverter and a negative-electrode-side power source conductive trace of the second three-phase inverter are disposed to at least partially face each other in a stacking direction of the multilayer circuit board, such that currents respectively flow through the power source conductive traces in opposite directions in a facing section. ... Jtekt Corporation

12/07/17 / #20170350483

Production method of ball screw device and production method of steering system using ball screw device

A production method of a ball screw device is provided. The ball screw device includes a ball screw portion, a ball nut, rolling balls, and a retainer. ... Jtekt Corporation

12/07/17 / #20170350482

Ball screw device, steering system using ball screw device, and method for producing retainer of ball screw device

A ball screw device including a low-cost retainer that is disposed between a ball screw shaft and a ball nut and has a flange portion, a steering system using the ball screw device, and a method for producing the retainer of the ball screw device are provided. The ball screw device includes the ball screw shaft, the ball nut, rolling balls, and the retainer. ... Jtekt Corporation

12/07/17 / #20170350481

Ball screw device and steering system

A cylindrical retainer configured to retain balls in a rollable manner is provided inside a ball screw nut. The retainer has retainer grooves each having a shape of an elongated hole that extends in an axial direction of a ball screw shaft so as to be inclined at a predetermined angle. ... Jtekt Corporation

12/07/17 / #20170350455

Constant velocity joint and method of manufacturing the same

Outer ball grooves of an outer joint member of a constant velocity joint each have a first ball groove for allowing a ball to roll therein when the constant velocity joint operates, and a second ball groove having a ball groove radius larger than a ball groove radius of the first ball groove. The second ball groove has a curved line and a connecting line. ... Jtekt Corporation

12/07/17 / #20170350450

Rolling bearing device

A rolling bearing device includes a first bearing section including a first outer ring, a first inner ring, and a plurality of balls, each of which is made of metal, and a second bearing section including a second outer ring, a second inner ring, and a plurality of balls, each of which is made of metal. The first inner ring and the second inner ring are electrically connected to each other, and the first outer ring and the second outer ring are electrically insulated from each other. ... Jtekt Corporation

12/07/17 / #20170350440

Method of manufacturing spline telescopic shaft

A method of manufacturing a spline telescopic shaft includes a masking step in which, in a prescribed axial-direction region of an intermediate manufacturing product, partial tooth grooves that are equally spaced circumferentially are respectively covered by masking members that are equally spaced circumferentially; a resin coating step in which a resin layer is formed, and inner surfaces of the partial tooth grooves covered by the masking members are left as metal exposed portions that are equally spaced circumferentially; and a coating film forming step in which, in a state where the intermediate manufacturing product provided with the resin layer is centered with respect to a broach via the metal exposed portions, the intermediate manufacturing product and the broach are caused to slide relative to each other in an axial direction by press-fitting such that the resin layer is shaved to form a resin coating film.. . ... Jtekt Corporation

12/07/17 / #20170349205

Steering apparatus

A rack housing and a reduction drive housing accommodate a ball screw mechanism and a reduction drive. Within the rack housing and the reduction drive housing, a gap is provided between the left end of a nut and the rack housing, and a gap is provided between the right end of the nut and the rack housing. ... Jtekt Corporation

12/07/17 / #20170349204

Vehicle steering system

A vehicle steering system includes a clutch provided on a power transmission path extending from a steering wheel to steered wheels, a reactive-torque motor configured to apply a steering reactive torque to the steering wheel, a steering operation motor configured to steer the steered wheels, and a clutch engagement controller configured to engage the clutch when a steered angle of the steered wheels has reached a steered angle limit value and the steering wheel is rotated by an amount equal to or greater than a first prescribed value in a direction opposite to a direction toward a steering neutral position, with respect to a first steering angle that is a steering angle of the steering wheel at a time when the steered angle reaches the steered angle limit value, in a case where the clutch is in a disengaged state.. . ... Jtekt Corporation

12/07/17 / #20170348898

Resin member production method

In a first process, a resin molded article having a predetermined shape is molded. Next, in a second process, a surface of the resin molded article is treated with plasma in a vacuum to provide irregularities in the surface of the resin molded articles. ... Jtekt Corporation

12/07/17 / #20170348828

Grinding wheel and method for manufacturing grinding wheel

A grinding wheel includes a disc-like member and a grinding layer disposed on an outer peripheral surface of the disc-like member. The grinding layer includes a plurality of circumferentially-divided grinding chips which are divided in a circumferential direction. ... Jtekt Corporation

11/30/17 / #20170343088

Ball screw device and steering system

A ball screw device and a steering system that include a retainer having more uniform stiffness are provided. Between a rack shaft and a ball screw nut, a cylindrical retainer having a plurality of retainer grooves that retain balls in a rollable manner is provided. ... Jtekt Corporation

11/30/17 / #20170343087

Ball screw device and steering system

A ball screw device is provided, including a retainer that can properly retain balls. The difference between a diameter being the pitch circle diameter of the ball screw device and the outside diameter of the rack shaft is set to be equal to or larger than the difference between the bore diameter of a ball screw nut and the diameter. ... Jtekt Corporation

11/30/17 / #20170341680

Electric power steering system

An electric power steering system includes a rack housing configured to accommodate a rack shaft, a pinion shaft meshed with the rack shaft, a speed-reducer including a worm wheel connected to a portion of the second pinion shaft protruding from the rack housing, a speed-reducer housing configured to accommodate the speed-reducer, and a seal member having an annular shape. The seal member is disposed closer to the second pinion gear than the worm wheel is, in the speed-reducer housing. ... Jtekt Corporation

11/23/17 / #20170339789

Semiconductor device and motor apparatus

A semiconductor device is provided that allows an ic chip and a heat sink to be prevented from being short-circuited even if facing surfaces of the ic chip and the heat sink are located closest to each other due to manufacturing variations and other variations. A controller for a motor apparatus includes a substrate on which mosfets are mounted and a heat sink provided facing the substrate and the mosfets so as to dissipate heat generated by the mosfets. ... Jtekt Corporation

11/23/17 / #20170336276

Sensor unit and magnetism collecting module and sensor apparatus

A sensor unit and a sensor apparatus are provided in which the size of the sensor unit itself is prevented from varying regardless of whether or not a redundant sensor is included, eliminating the need to change the design of a component to which the sensor unit is attached. Terminals of a sensor unit include a plurality of lead connection portions to which hall ics can be attached and a plurality of cable connection portions electrically connected to outside. ... Jtekt Corporation

11/23/17 / #20170335893

Universal joint yoke and intermediate shaft

A first yoke includes a tubular portion extending in a first direction, a flange, and a pair of arms extending from the flange. Support holes for a joint spider are formed at tips of the respective arms. ... Jtekt Corporation

11/23/17 / #20170335890

Wheel bearing apparatus

A wheel bearing apparatus includes a hub shaft having a flange to which a wheel is attached and which is located on a vehicular outer side, an outer ring, a plurality of rolling elements, an annular seal member, and an annular slinger. The slinger has a circular ring portion that is in contact with the flange and a tube portion extending from the circular ring portion toward a vehicular inner side. ... Jtekt Corporation

11/23/17 / #20170335886

Taper roller bearing

An annular cage provided with a taper roller bearing includes: a small-diameter annular portion, a large-diameter annular portion, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion to each other, and further includes roller retaining portions which prevent taper rollers accommodated in pockets from falling out to the outer side in the radial direction. Each of the roller retaining portions has a shape of a protruding beam that is a fixed end on the column portion side and on the small-diameter annular portion side, extends in the circumferential direction and in a column portion longitudinal direction, and is a free end on the tip end side in the extending direction.. ... Jtekt Corporation

11/23/17 / #20170335846

Gear pump

In a gear pump, a gear chamber is defined in a housing hole of a housing. A pair of gears is housed in the gear chamber. ... Jtekt Corporation

11/23/17 / #20170334479

Ball screw mechanism and steering system

A ball screw mechanism that allows a reduction in contact and friction between a retainer and a nut is provided. In a ball screw mechanism, a nut is threadedly engaged with a screw groove of a rack shaft through balls retained in a retainer groove of a retainer, and an axial force is applied to the rack shaft in accordance with rotation of the nut. ... Jtekt Corporation








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