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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


 new patent  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

 new patent  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

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

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

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

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

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

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

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

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

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

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

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

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

11/23/17 / #20170334110

Manufacturing method for gear

Over an outer peripheral surface of a sleeve, a primer layer is formed that is a thermoplastic resin-based adhesive thermally melted at a temperature lower than a melting point of a thermoplastic resin formed into a resin member to exhibit adhesiveness. With the sleeve preheated, a thermoplastic resin to be formed into the resin member is annularly injection-molded over an outer periphery of the sleeve.. ... Jtekt Corporation

11/16/17 / #20170328838

Visual inspection device and visual inspection method

A visual inspection device is an inspection device using an image obtained by shooting an inspection surface of an object to be inspected with a camera disposed so as to face the inspection surface. The object to be inspected is a rolling bearing and the inspection surface is a surface included in an outer ring of the rolling bearing. ... Jtekt Corporation

11/16/17 / #20170328410

Rolling bearing apparatus

A rolling bearing apparatus includes: a bearing including an inner ring, an outer ring, a plurality of rolling elements, and a cage; and an oil supply unit provided axially adjacent to the bearing. The oil supply unit includes: a tank in which to accumulate lubricant; and a pump provided with a nozzle that emits the lubricant as an oil droplet toward a target of the bearing. ... Jtekt Corporation

11/16/17 / #20170328409

Rolling bearing apparatus

A rolling bearing apparatus includes: a bearing including an inner ring, an outer ring, a plurality of balls, and a cage; and an oil supply unit provided axially adjacent to the bearing. The oil supply unit includes a tank in which to accumulate lubricant, and a pump that receives the lubricant in the tank and supplies the lubricant to the bearing. ... Jtekt Corporation

11/16/17 / #20170327143

Driving force transmission device

When relative positions of cages are changed from first positions to second positions, rollers are moved toward each other against an elastic biasing force of an elastic member such that an off state is achieved in which the rollers are disengaged from a cam surface or an inner peripheral surface portion to have a clearance therefrom. When the relative positions of the cages are changed from the second positions to the first positions, the rollers are moved away from each other by the elastic biasing force such that an on state is achieved in which one of the rollers on a downstream side engages with the cam surface or the inner peripheral surface portion without any clearance while the other of the rollers on an upstream side has a clearance from the cam surface or the inner peripheral surface portion.. ... Jtekt Corporation

11/16/17 / #20170326621

Method for manufacturing outer ring of constant velocity joint

A method is provided for manufacturing an outer ring of a constant velocity joint including an outer ring, an inner rotational member, a torque-transmitting rolling element, and a defining member. The outer ring includes: a first inner peripheral surface to which the defining member is attached; a second inner peripheral surface; and protrusions protruding radially inward of the first inner surface and the second inner peripheral surface so as to restrict axial movement of the inner rotational member and the rolling element. ... Jtekt Corporation

11/09/17 / #a method for detecting a situation of loss of grip of a vehicle provided with a steering system operated by a steering wheel, said method being in that it comprises a step (a) of evaluating a first indicator of loss of grip (p1) comprising calculating, as the first indicator of loss of grip (p1), the partial derivative

Jtekt Europe

. . ... Jtekt Corporation

11/09/17 / #20170321759

Constant-velocity joint

In a constant-velocity joint, a center locus of a ball rolling on a first outer large-diameter portion has an arc shape having an arc center, and a center locus of the ball rolling on a second outer large-diameter portion has an arc shape having an arc center. Center loci of the ball rolling on an outer extension portion are positioned; throughout their lengths, in a region inducing a tangent line to an opening-side end portion of the center locus of the ball rolling on the second outer large-diameter portion, the region being positioned outward of the tangent line in a radial direction of the outer joint member. ... Jtekt Corporation

11/09/17 / #20170321750

Taper roller bearing

A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers in which a cavity portions are formed on a large end surface, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion which is positioned on the other axial side and on the outer side in the radial direction of the large flange, and a plurality of column portions. ... Jtekt Corporation

10/26/17 / #20170310502

Facility system

In a facility system, a first gateway plc connected to first processing machines and second gateway plcs connected to second processing machines are connected to an upper-level network. Further, the first gateway plc and the second gateway plcs control operation mutually associated between the first processing machines and the second processing machines on the basis of mutually associated information which is acquired from the first processing machines and the second processing machines.. ... Jtekt Corporation

10/26/17 / #20170308842

Work instruction system

A work instruction system for a facility including processing machines is configured to provide work instructions on the processing machines to workers. The work instruction system includes a process plan storage section configured to store a process plan that defines a performing sequence regarding processing performed by the processing machines and work on the processing machines performed by the workers; a next work candidate extraction section configured to extract next work candidates for the workers based on current states of the processing machines and the process plan; a capacity database configured to store work capacity of each worker with regard to each work type; and a next work determination section configured to determine next work for a specified worker from among the next work candidates, based on the work capacity stored in the capacity database.. ... Jtekt Corporation

10/26/17 / #20170308065

Operation order system

An operation order system includes a management apparatus that manages processing executed by a plurality of processing machines and operations performed on the processing machines by operators and that determines a next operation for each operator based on an operation state of the operator, and portable terminal that can be carried by the operator and via which the operator can input the operation state of the operator so that the portable terminal transmits the input operation state to the management apparatus through wireless communication, the portable terminal receives the next operation from the management apparatus through wireless communication and displays the received next operation. The portable terminal receives, as the operation state, operation start information or operation completion information input from the operator indicating that the operator has started or completed the operation at a home position in a facility.. ... Jtekt Corporation

10/26/17 / #20170307059

Worm speed reducer and electric power steering system

A worm speed reducer includes a worm and a worm wheel meshed with the worm. The worm wheel has teeth with a modulus of elasticity of 6000 pa or more. ... Jtekt Corporation

10/26/17 / #20170307015

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 side in a axial direction, a large-diameter annular portion which is positioned on the other side in the axial direction and on a radial outer side of a large flange of the inner ring, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion. ... Jtekt Corporation

10/12/17 / #20170292822

Gear measurement method and gear measurement apparatus

A gear measurement method and a gear measurement apparatus capable of evaluating meshing and fitting of a gear are provided. A measurement method for a gear includes a measurement step of measuring an actual movement locus of a ball that is moved along a tooth groove of the gear as a shape evaluation index for the gear. ... Jtekt Corporation

10/12/17 / #20170292596

Differential apparatus

A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a side member movable inside the differential case in an axial direction and an actuator for moving the slide member to the axial direction. ... Jtekt Corporation

10/12/17 / #20170292569

Rolling bearing

A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements arranged between a raceway surface of the inner ring and a raceway surface of the outer ring, and a cage that holds the rolling elements at intervals in a circumferential direction. The raceway surfaces have a contact angle with each of the rolling elements. ... Jtekt Corporation

10/12/17 / #20170292567

Rolling bearing

A rolling bearing includes a cage formed by coupling a first and a second division pieces into which the cage is divided in an axial direction. At least the first division piece is provided with a protruding portion extending in an axial direction toward the second division piece and having a locking portion formed at a tip of the protruding portion with the locking portion protruding toward a radially outer side. ... Jtekt Corporation

10/12/17 / #20170291492

Differential apparatus

A differential apparatus includes a differential mechanism, a differential case that accommodates differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator for moving the slide member in the axial direction. ... Jtekt Corporation

10/12/17 / #20170291491

Differential apparatus

A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator. ... Jtekt Corporation

10/12/17 / #20170291259

Bonding method and bonding device for metal member

A bonding method includes: an oxide-film forming step, on an irradiated surface, an oxide film having a film thickness corresponding to a first output and an irradiation time of an oxide-film-forming laser beam; a first reflected-laser-beam detection step of detecting a second output; a first absorptance computing step of computing a first absorptance for the oxide-film-forming laser beam; laser-beam switching step of switching the oxide-film-forming laser beam radiated onto the irradiated surface to a heat-bonding laser beam; and a heat bonding step of heating a first bonding surface until the temperature thereof reaches a predetermined bonding temperature, and bonding the first bonding surface to a second bonding surface.. . ... Jtekt Corporation

10/05/17 / #20170288514

Synchronous reluctance motor

A plurality of flux barriers in each of flux barrier groups include arcuate portions formed in a polygonal region. The arcuate center of the arcuate portions in each of the flux barrier groups is set to the circumferential center point of the flux barrier group on the outer peripheral edge of a rotor. ... Jtekt Corporation

10/05/17 / #20170288120

Control apparatus and fluid feeder control method

A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. ... Jtekt Corporation

10/05/17 / #20170284467

Rolling bearing

In a rolling bearing in which one of inner and outer rings is a rotary ring and the other is a stationary ring, a fitting surface of the stationary ring fitted to a mating member is formed in first and second partial peripheral surfaces of a radially outer surface of the stationary ring which faces the mating member. The first partial peripheral surface is formed on one side in the axial direction, and the second partial peripheral surface is formed on the other side in the axial direction with respect to the first partial peripheral surface. ... Jtekt Corporation

10/05/17 / #20170282972

Securing of a driving assistance function within a power steering

A method of controlling a power steering system including at least one course control function, whereby a position setpoint is determined automatically according to a reference course that a vehicle is to be made to follow, then a motor setpoint applied to an assistance motor is adjusted accordingly, the method including a safety function which is distinct from the course control function and meets a higher asil safety level according to iso-26262 standard, said safety function including a diagnostics subfunction according to which a control parameter such as the angular position of the steering wheel, the driver torque applied to the steering wheel, or the rate at which the steering wheel is turned is monitored in order to detect the onset of an alert situation considered to be hazardous, then an intervention subfunction according to which, if an alert situation is detected, the course control function is neutralized.. . ... Jtekt Corporation

10/05/17 / #20170282816

Sensor apparatus

A sensor apparatus includes an interface circuit to which one of a digital sensor and an analog sensor is connected as a sensor that generates an electric signal corresponding to a physical quantity of a detection target and a cpu that calculates the physical quantity of the detection target based on the electric signal generated by the sensor. The interface circuit has a first power supply circuit, a second power supply circuit, a receiver including a receiver circuit, and an operation determination circuit. ... Jtekt Corporation

09/28/17 / #20170279340

Orientation magnetization device and magnet-embedded rotor

An orientation magnetization device includes plural orientation magnetization yokes and plural orientation magnetization magnets, and molds field magnets while a rotor core is disposed in a magnetic circuit that is formed by assembling the orientation magnetization yokes and the orientation magnetization magnets into an annular shape. When the rotor core is disposed in the magnetic circuit, protruding portions are disposed at portions of the respective orientation magnetization yokes facing the rotor core. ... Jtekt Corporation

09/28/17 / #20170276177

Bearing device

A bearing device includes a bearing portion that includes an inner ring, an outer ring, a plurality of rolling elements that are interposed between the inner ring and the outer ring, and a cage that holds the plurality of rolling elements, one of the inner ring and the outer ring being a rotational ring, and another of the inner ring and the outer ring being a fixed ring; and an oil supply unit that is provided adjacent to the bearing portion in an axial direction. The cage includes a guide portion that is configured to be in sliding contact with a part of the fixed ring via lubricating oil. ... Jtekt Corporation

09/28/17 / #20170276133

Vane pump

A vane pump sucks the hydraulic fluid from a first inlet port and discharges it into a first outlet port and, at the same time, sucks the hydraulic fluid from a second inlet port and discharges it into a second outlet port, as a rotor having a plurality of slits housing vanes and extending in a radial manner rotates. The vane pump has a first back-pressure groove that is communicated with some of the slits to supply a back pressure from the first outlet port to the corresponding vanes and a second back-pressure groove that is communicated with other of the slits to supply a back pressure from the second outlet port to the corresponding vanes. ... Jtekt Corporation

09/28/17 / #20170274492

Cam grinding machine and cam grinding method

In a cam grinding method, a common surface of a first cam and a second cam is acquired in a common surface setting step. In a first common surface grinding step performed after a first cam grinding step, traverse movement of a grinding wheel is performed such that the grinding wheel is aligned with an area from the first cam to the second cam while the first cam and the second cam are rotated, and the common surface is ground. ... Jtekt Corporation

09/21/17 / #20170272009

Motor control device and steering control device

A steering control device capable of suppressing a reduction in reliability even in the case where the redundancy of the power source is increased is provided. A steering ecu includes two control systems in which different external power sources are connected to two drive circuits. ... Jtekt Corporation

09/21/17 / #20170269811

Control panel for machine tools and management system for machine tools

To provide a control panel for machine tools that improves operability and enables even an unskilled person to easily grasp a procedure for moving a screen to a target screen. A plurality of screen data are classified into a plurality of groups and classified into main screen data and sub-screen data associated with the main screen data in each of the groups. ... Jtekt Corporation

09/21/17 / #20170268570

Ball bearing

A cage has an annular portion positioned on an axially first side of balls and a plurality of cage bars provided to extend from the annular portion toward an axially second side. Pockets each housing a corresponding one of the balls correspond to areas each located on the axially second side of the annular portion and between two cage bars adjacent to each other in a circumferential direction. ... Jtekt Corporation

09/21/17 / #20170267282

Damper apparatus and steering system

A damper apparatus includes a shock-absorbing member configured to absorb a shock while restricting movement of a shaft relative to a housing. The shock-absorbing member includes a shock-receiving member configured to come into contact with one member, which is one of a large-diameter portion of the shaft and a restriction portion of the housing, and a pre-compression spring disposed between the other member, which is the other of the large-diameter portion and the restriction portion, and the shock-receiving member in a state where the pre-compression spring is compressed in advance in an axial direction. ... Jtekt Corporation

09/21/17 / #20170267277

Steering system

A steering system includes a rack housing in which a rack shaft is housed, rack ends fitted to respective end portions of the rack shaft and coupled to respective steered wheels, and shock-absorbing members provided between the rack housing and the respective rack ends. When the rack shaft moves in a direction in which an end face of the rack end approaches a restricting surface of the rack housing and thus the rack shaft reaches a position after the shock-absorbing member is compressed by a compression amount, a control unit creates a normal input end through electronic stopper control of reducing an assisting force to be generated by a motor. ... Jtekt Corporation

09/21/17 / #20170267276

Steering control apparatus

A steering control apparatus includes a steering angle feedback processing unit and an operation signal generation processing unit that operate a reaction force actuator to adjust a steering angle to a target steering angle that is a target value for the steering angle based on feedback control, an ideal-axial-force calculation unit that calculates an ideal axial force, a road-surface-axial-force calculation unit that calculates a road surface axial force, an axial-force allocation calculation unit that calculates a base reaction force in which the ideal axial force and the road surface axial force are allocated in a predetermined ratio, and a target steering angle calculation processing unit that sets a target steering angle based on the base reaction force. The steering angle feedback processing unit feeds back the target steering angle in which road surface information is incorporated through the road surface axial force, so that the steering angle is controlled.. ... Jtekt Corporation

09/14/17 / #20170261049

Driving force transmission device control apparatus and control method

A control apparatus controls a driving force transmission device including: an electric motor; a pressing mechanism to convert the rotational force of the motor into an axial pressing force; friction clutches including friction members configured to come into frictional engagement with each other by the pressing force provided by the pressing mechanism. The driving force transmission device is configured to transmit a driving force between a pair of rotary members by the friction clutches. ... Jtekt Corporation

09/14/17 / #20170259845

Steering control system

The microcomputer calculates a first assist component based on a vehicle speed value and a steering torque, calculates a rotation angle command value based on at least the vehicle speed value and a first assist component, and calculates a second assist component by adjusting a rotation angle to the rotation angle command value through feedback control. The microcomputer sets a limited state 1 where the second assist component is disabled when a vehicle is stationary. ... Jtekt Corporation

09/14/17 / #20170259844

Steering apparatus

A steering apparatus includes a steering shaft; a steered shaft; a ball screw mechanism; and a motor. A plurality of rolling elements includes large-diameter rolling elements and small-diameter rolling elements. ... Jtekt Corporation

09/14/17 / #20170259387

Tilt device for machine tool

A tilt device includes: a drive motor that provides a drive force for swinging a tilt member; an auxiliary cylinder coupled to the tilt member to assist swing of the tilt member by the drive motor; and a control device that performs drive control of the drive motor and the auxiliary cylinder. In the movable range of the tilt member, a moment about the swing axis generated in the tilt member by the gravitational force is always directed to only one side in the rotational direction, and an assistive moment about the swing axis provided to the tilt member by a cylinder pressure is always directed to only the other side in the rotational direction. ... Jtekt Corporation

09/07/17 / #20170254400

Power transmission interrupting device and limited-slip differential

A power transmission interrupting device includes: an interrupting member that is restrained from rotating relative to the first rotating member, has engaging teeth engaging with a second rotating member, and is movable in an axial direction between a coupling position at which the engaging teeth engage with the second rotating member and an uncoupling position at which the engaging teeth do not engage with the second rotating member; and a moving mechanism that moves the interrupting member in the axial direction. The moving mechanism has an annular electromagnet, a yoke, and a moving member. ... Jtekt Corporation

09/07/17 / #20170254399

Power transmission interrupting device and limited-slip differential

A power transmission interrupting device includes: an interrupting member restrained from rotating relative to a first rotating member and movable in an axial direction between a coupling position at which the interrupting member engages with the second rotating member and an uncoupling position; and a moving mechanism moving the interrupting member in the axial direction. The moving mechanism has a magnetic flux generation unit, a holder unit, and a moving member. ... Jtekt Corporation

09/07/17 / #20170253265

Steering control system

A steering control system with which a steering angle accurately follows a steering angle command value is provided. An assist command value calculation circuit calculates a first assist component based on a value obtained by adding a basic assist controlled variable with a system stabilization controlled variable. ... Jtekt Corporation

09/07/17 / #20170253262

Steering system

A steering system includes a movable member and a tooth member. The movable member includes first tooth arrangements. ... Jtekt Corporation

09/07/17 / #20170253144

Vehicle

A vehicle includes front-wheels each of which is driven by a front-wheel driving motor having a first motor characteristic and a speed reducer, and rear wheels each of which is driven by a rear-wheel driving motor having a second motor characteristic. An ecu calculates a total target wheel torque of all the wheels, and calculates target wheel torques for the respective front wheels and the respective rear wheels based on the total target wheel torque, the first motor characteristic, the second motor characteristic, and a characteristic of the speed reducer. ... Jtekt Corporation

08/31/17 / #20170248175

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

08/31/17 / #20170247051

Steering control apparatus

A steered-angle command value calculation circuit calculates a steered-angle command value by adding a steering torque to a first assist component that is a sum of a basic assist control amount, a hysteresis control amount and a damping control amount. A steered-angle feedback control circuit calculates a second assist component by angle feedback control based on the steered-angle command value. ... Jtekt Corporation

08/31/17 / #20170247048

Steering control device

A steering control device capable of transmitting road surface state to a driver is provided. An ideal vehicle model computes first spring reaction force torque based on a target pinion angle and second spring reaction force torque based on at least lateral acceleration as components of a spring component of a steering assist force. ... Jtekt Corporation

08/24/17 / #to provide an analysis apparatus capable of improving the accuracy of analysis results. an analysis apparatus makes predictions about the quality of conditions of a production facility or the quality of conditions of a production object in a process of producing a crankshaft as the production object by a grinder as the production facility. the analysis apparatus includes the plurality of predictors making predictions about the quality by using different analysis methods based on data concerning the production facility, a selection unit selecting the plurality of predictors in use from the plurality of predictors,

Jtekt Corporation

. . ... Jtekt Corporation








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