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Jtekt Corporation patents (2015 archive)


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

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


12/31/15 / #20150377322

Worm speed reducer and method for manufacturing worm wheel included in worm speed reducer

A plane that contains a central axis of a worm shaft and that is orthogonal to a central axis of a worm wheel is arranged at a central position of the worm wheel in a tooth width direction thereof when no load is applied to a worm speed reducer. The worm wheel is formed by a cutting operation using a hob with a hob center offset from the central position toward an offset direction corresponding to a first direction along the tooth width direction. ... Jtekt Corporation

12/24/15 / #20150372466

Waterproof structure for electronic unit

A waterproof structure for an electronic unit includes a sub-case that defines an accommodating portion that accommodates a first terminal, and has a cable guiding hole that communicates with the accommodating portion. A potting resin filled in the accommodating portion is also filled in a space between a cable and the cable guiding hole. ... Jtekt Corporation

12/24/15 / #20150369679

Torque sensor and electric power steering system

A torque sensor includes a pair of magnetic yokes arranged in a magnetic field from a multipolar magnet that rotates integrally with, for example, a first shaft, and the magnetic yokes rotate integrally with, for example, a second shaft. The torque sensor includes magnetic collecting elements magnetically coupled to the respective magnetic yokes and a magnetic flux detecting element. ... Jtekt Corporation

12/24/15 / #20150367887

Steering system

A steering system includes a rotation angle sensor that detects a signal related to an absolute steering angle, and an assist circuit that acquires the signal related to the absolute steering angle while an ignition switch is off in order to reduce battery consumption. The assist circuit includes a counter that updates a count value based on a result of detection by a first rotating direction determining unit and a second rotating direction determining unit that determine a rotating direction of a motor, and an abnormality detecting unit that detects an abnormality in absolute steering angle based on a past value and a current value of the count value in the counter.. ... Jtekt Corporation

12/24/15 / #20150367878

Steering system

A lock device of a steering system includes a tongue piece unit and a frame plate held on a first side plate. The tongue piece unit includes elastic tongue pieces supported in a cantilever manner by a vertical frame provided along at least one of longitudinal edge portions of at least one of first side plates to form a row that extends in a tilt direction. ... Jtekt Corporation

12/17/15 / #20150364737

Method for drying separator for non-aqueous electric storage device and method for manufacturing electric storage apparatus

In a method for drying a separator for a non-aqueous electric storage device including an organic material that thermally shrinks at a thermal shrinkage start temperature of 100° c. Or lower, a solvent impregnation and a drying are executed in this order; the solvent impregnation includes bringing the separator into contact with a solvent that has affinity for water and that causes the azeotropic phenomenon at a temperature lower than the boiling point of water so as to lower an azeotropic temperature of a mixture of moisture in the separator and the solvent below a temperature at which the separator starts thermal shrinkage, and the drying includes drying the separator brought into contact with the solvent at a temperature lower than a temperature at which the separator starts thermal shrinkage and higher than the azeotropic point.. ... Jtekt Corporation

12/17/15 / #20150360874

Conveyance system for machining apparatus

A conveyance system is provided which conveys an object to a machining apparatus using a conveying apparatus and which further enables power saving. A controller calculates a first conveyance completion estimated time when conveyance from a first mounting position to machining apparatuses at a reference speed is complete. ... Jtekt Corporation

12/17/15 / #20150360405

Apparatus for manufacturing constant velocity joint boot and method of manufacturing the same

An apparatus for manufacturing a constant velocity joint boot includes a molding mold that injection-molds a molded body using an inner mold and outer molds. The inner mold has a configuration in which split molds are disposed radially along an outer circumferential surface of a core shaft extending vertically. ... Jtekt Corporation

12/17/15 / #20150360392

Apparatus and method for manufacturing an electricity storage material

An apparatus and a method for manufacturing an electricity storage material are provided which can avoid defective coating of the electricity storage material. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of a solution produced by the dissolving device; a first filtering device that filters the solution having the viscosity adjusted by the viscosity adjusting device; and a kneading device that kneads the solution filtered by the first filtering device and an active material. ... Jtekt Corporation

12/10/15 / #20150355031

Optical non-destructive inspection method and optical non-destructive inspection apparatus

An optical non-destructive inspection method includes: heating including setting a measurement spot on a surface of a workpiece and irradiating the measurement spot with heating laser light using a heating laser light source, heat ray detectors, and a controller; acquiring a temperature rise property that is a temperature rise state of the measurement spot according to a heating time by detecting a heat ray radiated from the measurement spot to determine a temperature at the measurement spot; and determining whether or not a pressure contact state at pressure contact portions, which include a contact area and a contact pressure, is appropriate based on the temperature rise property.. . ... Jtekt Corporation

12/03/15 / #20150345572

Driving force transmission apparatus

A driving force transmission apparatus includes: a meshing member that switches two rotating members between a coupled state and an uncoupled state; a piston member with a plurality of locked portions formed along a circumferential direction; an armature that moves the piston member forward and backward between a first position where the armature presses the piston member in an axial direction and a second position where the armature does not press the piston member; a biasing member that biases the piston member in the opposite direction from the pressing direction of the armature; and a locking member that locks the locked portions. The piston member has a mechanism that mitigates a possible shock when the locking member comes into abutting contact with an abutting contact surface of a first locked portion.. ... Jtekt Corporation

12/03/15 / #20150345566

Driving force transmission device

A driving force transmission device includes: a switch member that switches a first rotary member and a second rotary member between a coupled state and a decoupled state; a second friction member that generates a frictional force between the rotary members; a piston member that has first to sixth engaged portions formed in the shape of a staircase and that presses the switch member and the second friction member in an axial direction; a biasing mechanism that presses the switch member and the second friction member toward the piston member; and an engaging member that engages with one of the plurality of engaged portions. The engaging member rotates the piston member by sliding on a plurality of tilted surfaces of the plurality of engaged portions, and the piston member is always pressed toward the engaging member by a biasing force of the biasing mechanism.. ... Jtekt Corporation

11/26/15 / #20150340975

Rotary electrical machine control device

A vehicle control device of a rotary electrical machine control device includes an application voltage generation unit that generates a voltage control signal that is used to apply a power supply voltage to a dc/dc converter at a voltage equal to or higher than the power supply voltage or at a voltage lower than the power supply voltage; and a voltage command value generation unit that generates a motor control signal that controls a drive motor. The voltage command value generation unit performs computation based on overmodulation pwm control as pwm control in the case where the application voltage that is lower than the power supply voltage is applied so as to output the motor control signal having a pulse width longer than a cycle of a pwm carrier.. ... Jtekt Corporation

11/26/15 / #20150337835

Pump

A pump includes: a housing in which a pump chamber accommodating an inner rotor and an outer rotor is formed in a pump chamber formation surface, and an o-ring groove is formed around the pump chamber; an o-ring that is placed in the o-ring groove; and a plate that is attached to the pump chamber formation surface and closely contacts the o-ring to close the pump chamber. Inter-hole grooves connecting to an outer edge of the pump chamber formation surface are formed around the o-ring groove.. ... Jtekt Corporation

11/19/15 / #20150330849

Torque sensor and electric power steering system

A torque sensor includes a first magnet fixed to a first shaft, a tubular magnetic yoke assembly in which a magnetic yoke core is molded with a resin member, and a first magnetic sensor that detects a magnetic flux from the first magnet induced by the magnetic yoke core. The torque sensor also includes a collar made of a ferromagnetic body that is fixed to an inner circumference of the magnetic yoke assembly and to which a second shaft is press-fitted and fixed, and a second magnet for an index sensor that is disposed on an outer circumference of the magnetic yoke assembly. ... Jtekt Corporation

11/19/15 / #20150330440

Ball joint and steering device including the same

A rack-and-pinion type steering device includes a ball joint for connecting a rack shaft and a tie rod. The ball joint includes a socket and a ball. ... Jtekt Corporation

11/19/15 / #20150329140

Steering system

A steering system includes a motor control apparatus that controls driving of a motor based on an assist command value. The motor control apparatus includes an angle command value calculating unit that calculates an angle command value based on an input value including a steering torque, and calculates an assist component through execution of angle feedback control allowing a turning angle of a vehicle to follow the angle command value. ... Jtekt Corporation

11/19/15 / #20150329139

Electric power steering apparatus

In an electric power steering apparatus, an intermediate member of a shaft coupling connecting an assisting electric motor and a speed reduction mechanism together includes a cylindrical intermediate boss portion, a plurality of arm portions extending radially from the intermediate boss portion, and engagement spaces each defined by a pair of the adjacent arm portions. Furthermore, the intermediate member includes a center portion, a first cover portion, and a second cover portion. ... Jtekt Corporation

11/19/15 / #20150328745

Machine tool with swiveling table

A machine tool is provided in which chips and the like are prevented from adhering to a sliding surface of an upper surface of a base and a sliding surface of a lower surface of a swiveling table. A machine tool includes a base that has four corners and is shaped to be elongated, a swiveling table that swivels while sliding on an upper surface of the base, and a swiveling cover that is supported by the base or the swiveling table so as to be able to swivel. ... Jtekt Corporation

11/19/15 / #20150328733

Machine tool with swiveling table

A machine tool that enables a reduction in the amount of deflection of a swiveling table is provided. A machine tool includes a base, a swiveling table that is shaped to be elongate and that swivels while sliding on an upper surface of the base, and an actuator attached to a longitudinal first end of the swiveling table to move a position of the first end of the swiveling table with respect to the base, thereby adjusting a swiveling angle of the swiveling table with respect to the base. ... Jtekt Corporation

11/19/15 / #20150328704

Gear machining device

A gear machining device is provided which can machine an accurate gear by a cutting process by synchronously rotating a machining tool and a workpiece at a high speed. A machining tool includes roughing cutting teeth for roughing bottom lands and right and left side faces of teeth of a gear, right side face finishing cutting teeth for finishing the right side faces of the teeth, and left side face finishing cutting teeth for finishing the left side faces of the teeth. ... Jtekt Corporation

11/19/15 / #20150328698

Rotary tool holder

A rotary tool holder is provided which enables effective suppression of possible chattering vibration when a workpiece is machined using a rotary tool. A tool holder that is a rotary tool holder includes a main body that rotates while holding a rotary tool, an additional mass supported by the main body with a radial gap, a fluid path provided in the main body, and a viscoelastic damper configured by a fluid fed to the radial gap between the main body and the additional mass via the fluid path.. ... Jtekt Corporation

11/12/15 / #20150321690

Ball screw mechanism and steering device

A ball screw mechanism includes: a rack shaft, on the outer peripheral surface of which a spiral rack screw groove is formed; a cylindrical nut, on the inner peripheral surface of which a spiral nut groove that faces the rack screw groove is formed; and a plurality of balls disposed in a rolling passage that is a space surrounded by the rack screw groove and the nut groove. The nut is provided with: shift portions provided at both ends of the nut groove to shift the track of the nut groove in the axial direction of the rack shaft from the rack screw groove and to displace the nut groove to be deeper in the radial direction of the rack shaft as the track is shifted; a circulation passage that connects between the shift portions; and passage entrances that each connect between the shift portion and the circulation passage.. ... Jtekt Corporation

11/05/15 / #20150316103

Rolling bearing

A rolling bearing includes an inner ring having an inner raceway face, an outer ring having an outer raceway face opposed to the inner raceway face, rolling elements rolling along the inner and outer raceway faces, in an interior of the bearing between the inner and outer rings, a first seal member interposed between an outer peripheral face of the inner ring and an inner peripheral face of the outer ring, and sealing the interior of the bearing, and a second seal member arranged in parallel with the first seal member, outside in an axial direction. The first and second seal members are disposed at a side closer to the interior of the bearing than an end face of the inner ring and an end face of the outer ring in the axial direction.. ... Jtekt Corporation

10/29/15 / #20150308558

Clippable shutter with a deflector skirt for a steering housing

The invention concerns a device (1) for protecting a steering mechanism (2) of a vehicle, said device (1) comprising a housing element (5) defining a chamber (7) of which the wall (6) is perforated with at least one access opening (8), and a plastic cap (10) that shuts said access opening (8), said cap (10) having, along the director axis (xx′) thereof, a stepped structure comprising a hub (11), which is engaged in a bore (12) of the access opening (8) and carries a sealing lining (13) that engages with said bore (12), then a collar (14), of which the overall diameter (d14) is greater than the diameter (d12) of the bore (12), said collar (14) being engaged by snap-fitting into a stop groove (20) hollowed into the housing element (5), and forming a baffle deflector (21) of which the diameter (d21) is greater than that (d12) of the bore (12).. . ... Jtekt Corporation

10/29/15 / #20150307127

Torque detection system and electric power steering apparatus

A torque detection system that is less likely to affect external equipment is provided. A sensor ic in a torque detection device includes: a magnetic detection element with its output voltage changing in magnitude in accordance with the amount of twist of a torsion bar; and a processing device that converts the output voltage into an output signal switched between a low level l and a high level h. ... Jtekt Corporation

10/22/15 / #20150300482

Vehicle differential gear

A vehicle differential gear includes first and second pinion gears rotatably supported by a differential case; first and second side gears meshing with the first and second pinion gears and each coupled to corresponding one of a pair of output shafts; and a center washer, a first end washer and a second end washer each having a sliding surface that slides with an axial end face of at least one side gear of the first or second side gears, the sliding surface being lubricated by a lubricating oil; wherein a surface treatment for enhancing a solid lubricating property is performed on the washers.. . ... Jtekt Corporation

10/22/15 / #20150300410

Bearing ring for roller bearing, roller bearing, and power transmission device

A bearing ring includes a raceway surface on which a roller of a roller bearing rolls, a rib portion end face that is provided on one side of the raceway surface in an axial direction and that faces a roller end face of the roller in which at least an outer circumferential side of the roller end face is a convex curved surface portion, and a recessed portion having a recessed shape provided in a corner between the raceway surface and the rib portion end face. The rib portion end face includes a contacting surface portion that the roller end face contacts, and a concave curved surface portion that is provided between the contacting surface portion and the recessed portion and that is smoothly continuous with the contacting surface portion. ... Jtekt Corporation

10/22/15 / #20150300295

Valve apparatus

A valve apparatus includes a body with a supply passage for gas and a solenoid valve housed in the body. The solenoid valve includes a tubular sleeve internally having a flow passage leading to the supply passage, and a valve element and a valve seat that open and close the flow passage. ... Jtekt Corporation

10/22/15 / #20150298726

Steering control system for vehicle and steering control method for vehicle

A steering control system for a vehicle includes an electric motor, a torque sensor, an angular velocity sensor, and a control unit. The electric motor applies assist force to a turning operation of a steering wheel. ... Jtekt Corporation

10/22/15 / #20150298721

Rack shaft and method for manufacturing rack shaft

A rack shaft used for a dual-pinion electric power steering apparatus includes: a hollow first shaft in which a first rack for transmission of manual steering force is formed; and a solid second shaft in which a second rack for transmission of steering assist force is formed and which is coupled to the first shaft. A method for manufacturing a rack shaft includes: forming a first rack in a hollow first shaft by plastic working; coupling a solid second shaft to the first shaft after the plastic working; and forming a second rack in the second shaft by cutting after the coupling.. ... Jtekt Corporation

10/01/15 / #20150277417

Method of inspecting ram of programmable logic controller, and programmable logic controller

A method of inspecting a ram of a programmable logic controller is provided that enables all unit storage regions in a ram inspection region to be inspected in about several minutes and that meets a predetermined safety standard. The inspection method includes the steps of: (a) dividing a ram inspection region, which is a region of the ram to be inspected, into a plurality of blocks; and (b) by a control device, writing a predetermined value into unit storage regions in a combination of blocks obtained by combining two blocks extracted from the divided blocks and thereafter sequentially inspecting whether or not values read from the unit storage regions each coincide with the written value. ... Jtekt Corporation

10/01/15 / #20150277415

Programmable logic controller and programming tool for programmable logic controller

A programmable logic controller capable of improving the expandability of a distributed control system and a programming tool for the programmable logic controller are provided. A programmable logic controller (plc) that constitutes a distributed control system includes: a variable table that includes variable information including identification symbols for identification of a plurality of plcs and variable names of reference variables, the variable information being set for each of the reference variables; a storage device that has a memory region for storing the reference variables; and an interface circuit that mutually converts communication data for use in communication between the plc and a different plc and the reference variables stored in the memory region. ... Jtekt Corporation

10/01/15 / #20150275981

Universal joint assembly method and universal joint assembly apparatus

A universal joint includes: a pair of yokes each including a pair of arms in each of which a bearing hole is formed; four bearings each including a bearing cup press-fitted into the bearing hole and a plurality of needle rollers; and a joint spider including four shafts respectively supported by the bearings. A clinched portion that hinders the bearing cup from slipping out of the bearing hole is formed at the peripheral edge of the bearing hole. ... Jtekt Corporation

10/01/15 / #20150275974

Cage unit and tapered roller bearing equipped with cage unit

Provided is a cage unit including a cage having a small diameter side annular portion, a large diameter side annular portion arranged so as to be spaced apart in an axial direction from the small diameter side annular portion, and a plurality of cage bar portions that connect the small diameter side annular portion and the large diameter side annular portion; and a tapered roller accommodated in a pocket, which is a space surrounded by the small diameter side annular portion, the large diameter side annular portion, and the cage bar portions. A lubrication groove lying along a circumferential direction is formed on an inner end face of the large diameter side annular portion that faces a roller large end face of the tapered roller, and a circumferential length of the lubrication groove is designed such that the lubrication groove overlaps the roller large end face in the circumferential direction.. ... Jtekt Corporation

10/01/15 / #20150274200

Steering device

A steering device includes a ball screw mechanism 8 that applies a force in the axial direction to a rack shaft of a vehicle, and a bearing that rotatably supports a nut with respect to a housing. The steering device also includes a plate disposed with a gap between the bearing and the plate in a rack shaft axial direction, and a coned disc spring disposed between the bearing and the plate. ... Jtekt Corporation

09/24/15 / #20150267754

Bearing device

An inner ring has a plurality of grooves which are formed on its inner peripheral face and extended from an end thereof in an axial direction. The grooves are extended from both ends in the axial direction of the inner ring inwardly in the axial direction, and closed in a middle part in the axial direction of the inner peripheral face of the inner ring. ... Jtekt Corporation

09/24/15 / #20150267750

Bearing device for wheel

In a wheel bearing device including double ball rows, in a rotary raceway surface associated with the ball row on a vehicle outer side, a generatrix on a contact angle side has a circular arc shape, and the height of a shoulder on the vehicle outer side of the rotary raceway surface is larger than the curvature radius of the circular arc portion.. . ... Jtekt Corporation

09/17/15 / #20150261214

Numerical control unit and nc program creating unit

A numerical control unit is provided that can change an override value according to various workpiece materials and can extend the tool life. A numerical control unit includes a variation storage unit that stores a variation in override value of a feed speed or a spindle speed for each workpiece material, an override value setting unit that sets the override value based on the variation in override value according to the material of a workpiece being machined; and a control unit that changes the feed speed or the spindle speed based on the override value.. ... Jtekt Corporation

09/17/15 / #20150261213

Nc program creating device

An nc program creating device is provided that can automatically insert in an nc program a code that can be executed simultaneously with feeding in a non-cutting state. If it is determined by a determination unit that there is a standard code m03, m06, m10 before or after a non-cutting feed code g00 or g30 in an nc program, a new code placement unit places, instead of the standard code m03, m06, m10, a simultaneous execution code m103, m805, m110 corresponding to the standard code m03, m06, m10 before the non-cutting feed code g00 or g30, and places after the non-cutting feed code g00 or g30 a code that performs at least a prescribed operation of the standard code m03, m06, m10 other than an operation of the simultaneous execution code m103, m805, m110.. ... Jtekt Corporation

09/17/15 / #20150260239

Control device for electromagnetic clutch

A control device for an electromagnetic clutch includes: a first switch that is connected to one end of an electromagnetic coil forming the electromagnetic clutch; a second switch that is connected to the other end of the electromagnetic coil; and a microcomputer that controls an on/off state of both switches. The control device further includes: a first diode having its anode terminal connected between the electromagnetic coil and the first switch and its cathode terminal connected between the second switch and an in-vehicle power source; and a second diode having its anode terminal connected to the ground and its cathode terminal connected between the electromagnetic coil and the second switch. ... Jtekt Corporation

09/17/15 / #20150259577

Fluorine-contained rubber composition and seal member

A fluorine-contained rubber composition is compounded of a fluorine-contained rubber, large-particle-diameter carbon black having a particle diameter of 90 nanometers or more, and carbon black for coloring having a particle diameter of 30 nanometers or less. A seal member is produced by forming the fluorine-contained rubber composition into a certain form and by vulcanizing the resulting fluorine-contained rubber composition. ... Jtekt Corporation

09/17/15 / #20150258659

Grinding wheel truing method and grinding machine

A truing device is supported so as to be elastically movable in the z-axis direction, which is parallel to a grinding wheel rotational axis, and elastically movable in the x-axis direction in which a grinding wheel cuts into the truing device, and includes a movement restriction device that controls prohibition and permission of elastic movement. The method includes: causing a surface of the grinding wheel to contact the truing device in the x-axis direction; and correcting a shape of the grinding wheel when the grinding wheel cuts into the truing device until the amount of elastic movement of the truing device in the x-axis direction reaches a first predetermined amount, by controlling the movement restriction device to prohibit elastic movement of the truing device, and thereafter causing the grinding wheel to further cut into the truing device in the x-axis direction by a second predetermined amount.. ... Jtekt Corporation

09/10/15 / #20150252848

Tapered roller bearing

A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and a cage. The cage includes: a large-diameter side annular portion and a small-diameter side annular portion that form wall portions in both axial ends of pockets; and a plurality of cage bars. ... Jtekt Corporation

09/10/15 / #20150252846

Thrust ball bearing cage and thrust ball bearing

An end in an axial direction of a cage includes a first end face located so as to surround a pocket, a plurality of claw-shaped protrusions that protrude from a periphery of the pocket in a first end face outward in an axial direction and toward a center of the pocket and extend along the periphery at intervals, and a second end face that is connected to an end of the first end face, which is located on the opposite side of the first end face from the pocket side, via a step and is located further outward in the axial direction than the first end face. A recess is defined by the claw-shaped protrusions, the first end face, and the step.. ... Jtekt Corporation

09/10/15 / #20150251692

Motor control device and electric power steering device

A motor control device includes a motor drive circuit and a microcomputer that controls the drive circuit. The microcomputer generates a control signal on the basis of duty command values du, dv, and dw to control the drive circuit. ... Jtekt Corporation

09/10/15 / #20150251691

Electric power steering device

A control device in an electric power steering device calculates a first assist component based on steering torque and a vehicle speed. The control device also calculates a compensation component associated with an reverse input and calculates a steered angle command value based on an addition value of the compensation component and basic drive torque that is an addition value of the steering torque and the first assist component, produces a second assist component by performing steered angle feedback control that causes the steered angle of a vehicle to follow the steered angle command value. ... Jtekt Corporation

09/10/15 / #20150251399

Resin coating forming method for spline shaft and spline shaft

A resin film is caught in a meshing portion between a spline shaft and a toothed roller. The spline shaft has an adhesive applied to the surface of splines formed on the outer periphery of the spline shaft, and has been heated. ... Jtekt Corporation

09/03/15 / #20150248124

Operation limiting device for machine tool

An operation limiting device applicable to a wide variety of machine tools and which improves the freedom of setting an operation limiting area. Two or three drive axes (xa, za) in different directions are designated from among a plurality of drive axes in the machine tool and the designated drive axes (xa, za) form the two or three dimensional coordinate system. ... Jtekt Corporation

09/03/15 / #20150247585

Solenoid valve and manufacturing method of the same

A solenoid valve has a coil spring that biases a spool valve toward a solenoid portion, and an adjuster screw that is positioned to interpose the coil spring between the adjuster screw and the spool valve and that is screwed in an internally threaded portion of a sleeve so that its axial position is adjusted. The sleeve is swaged with a swaging tool etc. ... Jtekt Corporation

09/03/15 / #20150247532

Tapered roller bearing

A front bearing (tapered roller bearing) includes an inner ring, an outer ring, a plurality of tapered rollers, a cage, and a lubricating oil holding member. The lubricating oil holding member includes: a cylindrical portion having an axial length from a large diameter-side outer ring end surface to an end portion of the cage and capable of resisting a pressing force for press-fitting the outer ring; a fitting hook that is connected to one end of the cylindrical portion, that projects in the axial direction from an abutment surface which is in surface contact with the large diameter-side outer ring end surface, and that is fitted in an engagement groove portion provided in an outer peripheral surface of the outer ring; and a projection that projects radially inward from an inner peripheral surface of the cylindrical portion.. ... Jtekt Corporation

08/27/15 / #20150243963

Apparatus and process for producing electricity storage material

A production apparatus for producing an electricity storage material is provided. The electricity storage material includes at least a thickener and an active material. ... Jtekt Corporation

08/27/15 / #20150239492

Vehicle steering device, failure determination method for vehicle steering device, and control method for steering motor

A vehicle steering device includes: a steering mechanism that steers steered wheels by driving of a steering motor according to operation of an operation unit; a motor angle sensor that detects a rotation angle of the steering motor as an electrical angle; a steered angle sensor that detects a steered angle of the steered wheels; a storage unit in which correspondence between the electrical angle and the steered angle that are detected is stored in advance; and a failure determination unit that determines whether there is a failure or not by comparing the relation between the detected electrical angle and the detected steered angle with the correspondence between the electrical angle and the steered angle that is stored in the storage unit.. . ... Jtekt Corporation

08/27/15 / #20150239151

Kneading device

A kneading device includes: a preliminary kneading device that produces a preslurry by agitating a powder and a liquid introduced and transferring them while wetting the powder with the liquid; and a main kneading device that causes the powder to be uniformly dispersed in the preslurry supplied from the preliminary kneading device to produce a slurry. The main kneading device includes a gap defined by two conical surfaces that face each other with a predetermined distance therebetween and rotate relative to each other about their central axes. ... Jtekt Corporation

08/20/15 / #20150232120

Electric power steering apparatus

An electric power steering apparatus is provided which can suppress the difference in steering feel between before and after it is allowed to compute an absolute steering angle and which can improve the steering feel. A basic assist control unit sets a basic assist current value. ... Jtekt Corporation

08/13/15 / #20150225018

Steering assist device

There is provided a steering assist device that allows a vehicle to avoid departing from a lane. A basic target current value setting unit sets a basic target current value on the basis of steering torque and a vehicle speed. ... Jtekt Corporation

08/13/15 / #20150225012

Electric power steering device

An electric power steering device includes a motor, a drive pulley that is connected to the output shaft of the motor and includes helical teeth, a driven pulley that is arranged coaxially with a rack shaft and includes helical teeth, and a belt that is wound around these pulleys and includes helical teeth meshing with the respective helical teeth of both pulleys. Internal teeth on a belt each are formed to have a tooth thickness that is reduced toward both ends thereof along the width direction of the belt.. ... Jtekt Corporation

07/30/15 / #20150209921

Vehicle steering system and manufacturing method for vehicle steering system

Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. ... Jtekt Corporation

07/23/15 / #20150206642

Core manufacturing device and core manufacturing method

A manufacturing device for a rotor core includes: a magnetization device that magnetizes magnet raw materials before being magnetized disposed in magnet insertion holes of the rotor core to turn the magnet raw materials before being magnetized into permanent magnets; and a detachment device that detaches the rotor core from the magnetization device. The detachment device also functions as a mounting device that mounts a jig around the rotor core when the rotor core is detached from the magnetization device.. ... Jtekt Corporation

07/23/15 / #20150204435

Rack housing manufacturing method and rack housing

A manufacturing method includes: forming a tubular portion of a rack housing by press forming from prepregs formed by stacking fiber-reinforced composite materials obtained by impregnating fiber sheets with a thermoplastic resin; and thereafter injecting a thermoplastic resin containing fillers for injection molding to form coupling portions integrated with metal rings. A rack housing is manufactured by the manufacturing method described above.. ... Jtekt Corporation

07/23/15 / #20150203163

Method for manufacturing telescopic shaft

A telescopic shaft includes a hollow outer shaft, an inner shaft spline-fitted to the outer shaft, a resin coating provided on splines on at least one of the outer and inner shafts, and can be extended and contracted in an axial direction. A method for manufacturing the telescopic shaft includes press-fitting the inner shaft into the outer shaft and sliding one of the outer and inner shafts relative to the other of the outer and inner shafts by reciprocating the one shaft in the axial direction. ... Jtekt Corporation

07/23/15 / #20150203145

Steering apparatus

A steering apparatus includes a gear lock mechanism that fastens a first side plate to a second side plate by a fastening member. In a lock operation, a main body of the fastening member of a fastening mechanism presses a second tooth row forming member toward the first side plate, and a guided projection of the fastening member rotates slightly in the range of play in a lock direction. ... Jtekt Corporation

07/16/15 / #20150200396

Apparatus and method for manufacturing an electricity storage material

An apparatus and method for manufacturing an electricity storage material are provided which allow easily measuring the dissolution rate to solubility of a solution of a powder thickener dissolved in a liquid solvent. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves in a liquid solvent a thickener as powder that is ionized when dissolved; and a dissolution-rate-to-solubility determining device that measures conductivity of the solution produced by the dissolving device and determines a dissolution rate to solubility of the solution based on the measured conductivity. ... Jtekt Corporation

07/16/15 / #20150199808

Degree-of-dispersion inspecting apparatus for particles of electricity storage material in electricity storage device

A degree-of-dispersion inspecting apparatus accurately quantifies the degree of dispersion of particles of an electricity storage material based on in-plane uniformityand void size uniformity, which are obtained from an image of a coating film of the electricity storage material. The in-plane uniformity is a macroscopic value based on the ratio of voids between the particles in the electricity storage material, and the void size uniformity is a microscopic value based on values equivalent to the sizes of the voids between the particles in the electricity storage material. ... Jtekt Corporation

07/16/15 / #20150198202

Tapered roller bearing and power transmission device

A curvature radius of a large rib end face of an inner ring is set to a value larger than a distance r, and a curvature radius of a large end face of a tapered roller is set to a range of 80 to 100% relative to the distance r, where r represents a distance from a cone center of the tapered roller to a predetermined reference point that is separated from the cone center along an inner ring raceway surface. A center of a contact ellipse that is formed by contact between the large end face of the tapered roller and the large rib end face of the inner ring is located on an imaginary straight line passing through a center of curvature of the large end face of the tapered roller and a center of curvature of the large rib end face of the inner ring.. ... Jtekt Corporation

07/16/15 / #20150197274

Off-centre yoke for a motor vehicle steering system

The invention relates to a yoke device which includes a rotary pad (10), the inner periphery (11) of which is off-centre relative to the outer periphery (12), clamped against the rear of the rack, and thus pushed toward the teeth of the steering pinion. The rotary pad (10) engages, via the outer periphery thereof (12), with an arcuate cradle (14) of a mounting (13) mounted in the steering gearbox, said pad being biased and rotatably positioned by a clearance-compensation mechanism having a spring means. ... Jtekt Corporation

07/09/15 / #20150194265

Method for manufacturing electricity storage device

An electricity storage member in an electricity storage device is manufactured by a step of folding a positive electrode material foil and folding a negative electrode material foil, a step of arranging the positive and negative electrode material foils with a separator foil interposed therebetween, and a step of positioning the positive and negative electrode material foils by relatively moving the positive and negative electrode material foils toward each other so as to insert one end of a second material foil among the positive and negative electrode material foils into a bottom of a valley of the first material foil, and restraining the one end of the second material foil with the bottom of the valley of the first material foil.. . ... Jtekt Corporation

07/09/15 / #20150192198

Vehicle driving force distribution device

A vehicle driving force distribution device includes: a differential gear; a driving force transmission device; and a case member having a first accommodating chamber accommodating the differential gear and a second accommodating chamber accommodating the driving force transmission device. The case member has a first flow passage that allows lubricating oil to flow from the first accommodating chamber into the second accommodating chamber, and a second flow passage that allows lubricating oil to flow from the second accommodating chamber into the first accommodating chamber. ... Jtekt Corporation

07/09/15 / #20150192196

Pulley unit

A pulley unit having a sleeve, a pulley and a cap member, wherein the cap member has an annular portion extending from a cover portion in an axial direction and fitted into a hexagon socket portion (polygonal inner peripheral portion), claw portions are formed to extend from the annular portion in the axial direction, and a peripheral surface of the annular portion is provided with first plane portions facing surfaces of the hexagon socket portion.. . ... Jtekt Corporation

07/09/15 / #20150191194

Steering apparatus

A steering apparatus has a tilt mechanism, and a locking direction of a tilt lock operation lever is a direction in which the operation lever is pushed down about a central axis. A width of a second end of a tilt elongate hole, which is located on a tilt direction lower side, is narrower than a width of a first end of the tilt elongate hole, which is located on a tilt direction upper side.. ... Jtekt Corporation

07/09/15 / #20150191087

Vehicle control device

A vehicle control device includes a drive motor and an engaging/disengaging mechanism having a function to permit and cut off torque transmission between the drive motor and wheels. The vehicle control device further includes a smoothing capacitor that smoothes electric power applied from a secondary battery, a drive circuit for the drive motor, a drive circuit for the engaging/disengaging mechanism, and a microprocessor for controlling each drive circuit. ... Jtekt Corporation

07/09/15 / #20150191044

Bearing module

In a hub unit of a bearing module, an outer end face of an attachment flange of an outer ring in a vehicle lateral direction is located further outward in the vehicle lateral direction than a point of a load applied to the outer ring from rolling elements located on an outer side in the vehicle lateral direction. A fitting surface for determining a radial position of the outer ring with respect to an inner periphery defining a supporting hole is formed on an outer periphery of an insertion portion. ... Jtekt Corporation

07/02/15 / #20150184738

Planet roller speed changer

A first radial bearing and a second radial bearing are respectively disposed in two rows between the outer periphery of a pin and the inner periphery of a corresponding planet roller so as to face each other in the thrust direction. A first inner ring of the first radial bearing is fitted onto a first region of the pin by interference fit. ... Jtekt Corporation

06/25/15 / #20150176650

Ball bearing

A ball bearing includes an outer ring; an inner ring; a plurality of balls; and a cage that has an annular shape. Oil flows into an area between the outer ring and the inner ring from one side in an axial direction and flows out from the other side in the axial direction. ... Jtekt Corporation

06/25/15 / #20150176649

Tapered roller bearing

A corner is formed at a small-diameter-side end portion of a cage. The cage is disposed such that the axial position of a tip of the corner substantially coincides with the axial position of a large end face of an outer ring. ... Jtekt Corporation

06/25/15 / #20150176648

Tapered roller bearing

A tapered roller bearing includes: an outer ring; an inner ring; a plurality of tapered rollers; and a cage that holds the tapered rollers at equal intervals in the circumferential direction of the tapered roller bearing. A small-diameter-side inner periphery end portion of the cage is located at a position inward of an axially outer small end face of the inner ring in the axial direction of the tapered roller bearing. ... Jtekt Corporation

06/25/15 / #20150176642

Wheel bearing device

A wheel bearing device includes: an inner shaft; an inner ring; an outer ring; and first and second rolling element groups. The first rolling element group is disposed on the vehicle outer side. ... Jtekt Corporation

06/25/15 / #20150175000

Vehicle differential apparatus

A vehicle differential apparatus is provided with: a differential case rotatable around a rotation axis in which a first shaft insertion hole is formed along a direction perpendicular to the rotation axis, a pair of side gears, a pinion gear meshing with the paired side gears in which a second shaft insertion hole is formed in an axial center portion of the pinion gear, and a pinion shaft including an insertion end portion inserted in the first shaft insertion hole of the differential case and a pinion gear support portion inserted in the second shaft insertion hole of the pinion gear to rotatably support the pinion gear. The pinion gear is supported so as to be movable in the rotation axis direction by a meshing reaction force generated from a meshing engagement with the pair of side gears.. ... Jtekt Corporation

06/18/15 / #20150167821

Planet roller speed changer

In a planet roller speed changer, a plurality of shaft portions of a carrier is disposed such that, when the carrier is displaced in a direction that intersects with the axial direction of an output shaft, the outer periphery of at least one of the shaft portions that are displaced with a displacement of the carrier contacts the stationary ring-side portion of the inner periphery of is corresponding planet roller without contacting the input shaft-side portion of the inner periphery of the corresponding planet roller.. . ... Jtekt Corporation

06/18/15 / #20150167747

Shaft-to-universal joint coupling structure

A shaft-to-universal joint coupling structure includes: a column shaft; a universal joint including a shaft yoke; a sleeve to which the column shaft and the universal joint are fitted; and a coupling pin inserted into a through-hole of the shaft yoke and an insertion hole of the sleeve. The coupling pin has a small-diameter portion inserted into the insertion hole, and a step portion positioned inward of an inner peripheral face of the sleeve in the radial direction of the sleeve.. ... Jtekt Corporation

06/18/15 / #20150167742

Tapered roller bearing and power transmission device

In a tapered roller bearing, each of tapered rollers has a roller large end face, and a large rib end face of an inner ring. The large rib end face is formed at such a position that the large rib end face passes through the reference point, and a curvature radius of the large rib end face is set to a value within a range from 100% to 120% of a distance from a cone center of each of the tapered rollers to a prescribed reference point that is apart from the cone center along an inner ring raceway surface. ... Jtekt Corporation

06/18/15 / #20150166096

Eccentric yoke with backlash compensation for the steering system of a motor vehicle

The yoke device comprises a rotary pad (10), the inner periphery (11) of which is eccentric with respect to the outer periphery (12) and is applied against the back of the rack, which is thus pushed towards the teeth of the steering pinion. The rotary pad (10) is rotationally biased and positioned by a backlash compensation mechanism (17) with spring means. ... Jtekt Corporation

06/18/15 / #20150166063

Vehicle control apparatus and vehicle control method

A vehicle control apparatus executes automated cruise control under which a steering apparatus is controlled to make a vehicle perform automated cruise. The vehicle control apparatus sets a curvature radius difference threshold used in a process for determining whether to start automated cruise control, based on a transverse deviation of the vehicle. ... Jtekt Corporation

06/11/15 / #20150158496

Method for detecting the direction of travel of a motor vehicle

The invention concerns a method for determining the direction of longitudinal travel of a vehicle comprising a step (a) of collecting a first signal (signal1), representative of a first driving parameter, such as the steering-wheel torque, and of which the sign of the value and/or the sign of the variations is not dependent on the direction of longitudinal travel of the vehicle, a step (b) of collecting a second signal (signal2), representative of a second driving parameter separate from the first driving parameter, such as the yaw rate, and of which the sign of the value and/or the sign of the variations changes on the basis of the direction of longitudinal travel of the vehicle, then a step (c) of comparing signs during which the sign of the value, or of the variation, of the first signal (signal1) is compared with the sign of the value, or of the variation, of the second signal (signal2) in order to deduce therefrom the direction of longitudinal travel of the vehicle, depending on whether said signs are identical or, on the contrary, different.. . ... Jtekt Corporation

06/11/15 / #20150158224

Ring valve gate mold device

A ring valve gate mold device includes: a stationary mold and a movable mold that are disposed so as to be allowed to be joined together and separated from each other; an annular cavity used to form an annular product, the cavity being formed in a mating face that is an upper face of the movable mold; a supply passage through which molten resin is supplied via a circular gate connected to the entire circumference of the annular cavity; and a valve body that opens and closes the circular gate of the supply passage. The valve body is a tubular sleeve body that moves in the axial direction of the ring valve gate mold device to open and close the circular gate. ... Jtekt Corporation

06/04/15 / #20150151787

Steering apparatus

A steering apparatus configured to inhibit a driver from feeling uncomfortable when an end bush impact occurs is provided. The steering apparatus includes a rack shaft that makes a linear motion in a rack housing in response to rotation of a steering shaft, and a ball joint fitted to an end portion of the rack shaft. ... Jtekt Corporation

06/04/15 / #20150151784

Method for determining the absolute angular position of the steering wheel of a motor vehicle

The invention relates to a method for determining the absolute angular position of a steering wheel (3) of a vehicle, said method involving an initial-estimate step (a) during which a first value (angle1) indicative of the absolute angular position of said steering wheel (3) is evaluated by a first model based on analyzing a first vehicle running dynamic parameter, such as the speed differential of the wheels of one wheelset, a second-estimate step (b) during which a second value (angle2) indicative of the absolute angular position of said steering wheel is evaluated by a second model based on analyzing a second dynamic parameter, such as the yaw rate, followed by a checking step (c) during which the difference between the first value (angle1) and the second value (angle2) is compared against a predetermined consistency threshold (s) in order to decide, through suitable weighting, whether said values are to be considered or excluded.. . ... Jtekt Corporation

06/04/15 / #20150151782

Method for centering the steering wheel of a motor vehicle power-assisted steering

The invention relates to a method to assist with turning a vehicle power assisted steering wheel, during which method a return setpoint (final return setpoint) quantifying a return force intended to be applied to said steering wheel in order to assist with returning said steering wheel to a predetermined central position is formulated, said method involving at least one step (a) of determining longitudinal acceleration during which step the instantaneous longitudinal acceleration of the vehicle is evaluated, followed by a step (b) of adapting the return setpoint during which step the steering wheel return setpoint is adjusted according to said instantaneous longitudinal acceleration so as to increase the intensity of the return force if said longitudinal acceleration increases, and thus notably compensate for the lessening of the natural centring effect that is caused by the lightening of the steering under acceleration conditions.. . ... Jtekt Corporation

05/28/15 / #20150147504

Manufacturing method of bar component and bar component

A manufacturing method of a bar component including a pipe made of a carbon fiber reinforced resin and an internal metal member having an outer peripheral surface in contact with an inner peripheral surface of an end portion of the pipe in an axial direction is provided. The method includes: preparing a core including a metal mandrel extending in the axial direction and the internal metal member having the outer peripheral surface subjected to surface roughening process; winding a prepreg sheet obtained by impregnating carbon fibers with resin around an outer peripheral surface of the core; forming the pipe having the end portion fitted onto and fixed to the outer peripheral surface of the internal metal member by baking and curing the prepreg sheet wound around the outer peripheral surface of the core; and removing the mandrel from the pipe.. ... Jtekt Corporation

05/28/15 / #20150147017

Split cage and roller bearing

A split cage includes a plurality of cage segments, each of the cage segments having a pair of rim portions, and a pair of cage bar portions, the cage bar portions and the rim portions defining a pocket that accommodates a tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between an inner ring and an outer ring. ... Jtekt Corporation

05/28/15 / #20150147016

Split cage and roller bearing

A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. ... Jtekt Corporation

05/28/15 / #20150147015

Split cage and roller bearing

A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. ... Jtekt Corporation

05/28/15 / #20150144417

Power steering system

In a power steering system, when power is on, a normal mode process is executed and a target rotational speed is set based on a rotational speed map for a normal mode. When the normal mode process is being executed, if a first mode switching condition that a detected vehicle speed is equal to or lower than a prescribed value, the absolute value of a detected steering angle is equal to or greater than a prescribed value, and the absolute value of a detected steering, angular velocity is equal to or less than a prescribed value is satisfied, the target rotational speed is set based on a rotational speed map for a rack end mode.. ... Jtekt Corporation

05/21/15 / #20150142156

Flexible manufacturing system

There is provided a flexible manufacturing system that can reliably place a workpiece that isn't defective piece in a state where the workpiece will be machined again. After a pallet is conveyed to a standby position and before machining of the workpiece attached to the pallet is started, controllers determines whether machining of the workpiece with a corresponding machining device is possible. ... Jtekt Corporation

05/21/15 / #20150137499

Energy absorbing steering apparatus

An energy absorbing steering apparatus in which shock applied to a steering column is absorbed by plastic deformation of a bracket for suspending the steering column from a vehicle body. The bracket includes: a first plate portion; a second plate portion bent from a rear edge of the first plate portion toward a lower portion; a third plate portion bent from a lower edge of the second plate portion toward a rear upper portion; and a fourth plate portion bent from an upper edge of the third plate portion toward the lower portion. ... Jtekt Corporation

04/30/15 / #20150114790

Pump apparatus with switching valve and driving power transmission device

A pump apparatus with a switching valve includes an actuator that is rotationally driven, a pump, a switching valve and a driving power interrupting device. The pump discharges a fluid sucked by rotational driving of the actuator. ... Jtekt Corporation

04/30/15 / #20150114139

On-vehicle detector

An on-vehicle detector includes a torque detecting portion for magnetically detecting a torque transmitted to a rotating shaft rotated by steering operation, and a rotation detecting portion for magnetically detecting a rotation of the rotating shaft. The rotation detecting portion includes a magnet with a pair of magnetic poles and a magnetic detection element, the magnet being disposed on a side of the rotating shaft so as to rotate simultaneously with the rotating shaft and the magnetic detection element being disposed on a side of the rotating shaft to detect a change in magnetic flux density caused by the magnet approaching or moving away in accordance with the rotation of the rotating shaft. ... Jtekt Corporation

04/23/15 / #20150111474

Grinding method of grinding roller workpiece and grinding apparatus for grinding roller workpiece

A grinding method of grinding a roller workpiece to be formed into a roller of a rolling bearing includes an outer peripheral face machining step. In the outer peripheral face machining step, an outer peripheral face of a regulating wheel that is rotating, is brought into contact with an outer peripheral face of the roller workpiece that is supported from below by a support member, to rotate the roller workpiece, and a grinding wheel is brought into contact with the outer peripheral face of the roller workpiece that is rotating to grind the outer peripheral face of the roller workpiece. ... Jtekt Corporation

04/23/15 / #20150110432

Wheel bearing device

A sealing device includes a core metal that is fitted to the outer ring, and a sealing member that is fixed to the core metal. The core metal has a cylindrical portion that is fitted to the inner periphery of an end portion of the outer ring, an outer annular portion, and an inner annular portion. ... Jtekt Corporation

04/23/15 / #20150110428

Cylindrical roller bearing

A cylindrical roller bearing including an inner ring including a raceway surface on an outer periphery thereof an outer ring including a raceway surface on an inner periphery thereof a plurality of cylindrical rollers rollably disposed between the raceway surface of the inner ring and the raceway surface of the outer ring; and a cage for circumferentially retaining the cylindrical rollers at predetermined intervals. The cage is circumferentially provided with a plurality of guide pieces on an outer periphery of the cage at predetermined intervals, a guide piece of the plurality of guide pieces projecting toward the raceway surface of the outer ring to form a sliding contact portion which makes sliding contact with the raceway surface for guiding the rotation of the cage and for removing an excess lubricant on the raceway surface.. ... Jtekt Corporation

04/23/15 / #20150109114

Warning device for vehicle

In a warning device for a vehicle, a basic target current value setting unit sets a basic target current value based on a steering torque and a vehicle speed. When a lane deviation determining unit determines that there is a high possibility that a vehicle will deviate from a lane, a warning vibration wave generator generates a warning vibration wave containing a plurality of frequency components. ... Jtekt Corporation

04/16/15 / #20150104126

Conical roller bearing

The conical roller bearing includes an inner ring which includes an annular groove between an inner-ring-side raceway surface and a small-diameter-side end portion thereof, and a cage which includes an erected portion extending from a first annular portion of the cage towards the annular groove. The erected portion includes a first inclined portion and a second inclined portion. ... Jtekt Corporation

04/16/15 / #20150101444

Position adjustable steering device

When clamped side plates of an upper column bracket (movable bracket) are fastened via clamping side plates of an upper fixed bracket by a fastening shaft in response to a rotating operation of an operating lever, the brackets are locked with each other. A pressing mechanism that includes a pressing member moves in the axial direction of the fastening shaft in accordance with fastening by the fastening shaft, and presses a lower tube (inner tube) through an insertion hole formed in an upper tube (outer tube). ... Jtekt Corporation

03/26/15 / #20150085539

Electric power converter

A processor unit in an electric power converter executes detection of an overheating predicted state that is a stage prior to overheating of the igbts, a short circuit predicted state that is a stage prior to a short circuit in the arms, and a voltage drop predicted state that is a stage prior to a drop in a control voltage to be supplied to a driver circuit. When none of these predicted states is detected, a determination that an abnormality is not caused in the power module based on a latch signal is made by the processor unit. ... Jtekt Corporation

03/19/15 / #20150078948

Oil pump

An oil pump includes a rotor, an outer peripheral member accommodating the rotor, a first plate, and a second plate. A discharge passage through which hydraulic fluid is discharged is connected to a discharge port of the first plate. ... Jtekt Corporation

03/19/15 / #20150077093

Rotation angle detecting device

In a rotation angle detecting device, a first magnetic sensor and a second magnetic sensor are disposed at an interval of an electrical angle of 120 degrees around a rotation center axis of a rotor. An output signal of the first magnetic sensor is expressed by v1=sin θ, and an output signal of the second magnetic sensor is expressed by v2=sin(θ+120). ... Jtekt Corporation

03/19/15 / #20150075899

Electric power steering device

An electric power steering device includes a worm which is swingably connected to the rotation shaft of an electric motor through a joint. A first end portion and second end portion of the worm are supported by a first bearing and a second bearing, respectively. ... Jtekt Corporation

03/12/15 / #20150071796

Electric pump apparatus

A closing cover integrally includes a cover main body, and a ventilation cap body. The ventilation cap body has a connecting portion that is integrally connected to the cover main body, and at least one ventilation passage hole that is disposed in the connecting portion to perpendicularly extend, and has a depth smaller than a plate thickness of the cover main body. ... Jtekt Corporation

03/12/15 / #20150068862

Electromagnetic clutch device

An electromagnetic clutch device includes: a meshing member; an electromagnetic coil; an armature; a cylindrical cam member; and a locking portion. The cam member is provided with a plurality of locked portions to be locked by the locking portion at different axial positions, such that the plurality of locked portions is formed adjacent to each other in a circumferential direction; the cam member rotates only by a first predetermined angle due to an axial movement of the armature from a first position to a second position, and the cam member further rotates only by a second predetermined angle due to a movement of the armature from the second position to the first position; and when locking of the locking portion is shifted from one of the plurality of locked portions to another locked portion circumferentially adjacent thereto so that the locking portion locks the another locked portion at a different axial position, the second meshing portion is meshed with the first meshing portion.. ... Jtekt Corporation

03/05/15 / #20150066306

Electric power steering system

There is provided an electric power steering system that makes it possible to reduce an uncomfortable feeling given to a driver even when a detected steering torque value is held. The controller computes a detected steering torque value based on the detection signal, and provides compensation based on a compensation value to a basic current command value to compute a current command value. ... Jtekt Corporation

03/05/15 / #20150066305

Electric power steering system

There is provided an reliable electric power steering system. The electric power steering system includes a torque sensor that outputs a detection signal corresponding to a steering torque, and a controller. ... Jtekt Corporation

03/05/15 / #20150066303

Electric power steering system

There is provided an electric power steering system that makes it possible to reduce an uncomfortable feeling given to a driver even when current feedback control is executed in a state where a detected steering torque value is held. The electric power steering system includes a torque sensor that outputs a detection signal corresponding to a steering torque; and a controller that controls driving of a motor. ... Jtekt Corporation

03/05/15 / #20150063735

Rolling bearing and power transmission device including rolling bearing

A rolling bearing includes an inner ring; an outer ring coaxially disposed around an outer peripheral surface of the inner ring with an annular space between the inner ring and the outer ring; a plurality of rolling elements rollably disposed in the annular space; a cage that retains the rolling elements; and a bubble generating mechanism that generates bubbles in liquid lubricant during bearing rotation, wherein the liquid lubricant flows through the annular space.. . ... Jtekt Corporation

03/05/15 / #20150061436

Power generating device

A power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor.. ... Jtekt Corporation

03/05/15 / #20150061240

Stair climbing vehicle

A stair climbing vehicle that is able to stably climb stairs is provided. In order to keep the balance of the stair climbing vehicle at the time of climbing the stairs, the ratio between a gravity center moving control gain for the stair climbing vehicle and a turning control gain for first wheels and second wheels is changed by controlling the rotation of a first motor of each first turning actuator. ... Jtekt Corporation

03/05/15 / #20150060187

Steering apparatus

A steering apparatus includes a driving pulley, a driven pulley, a belt wound around the driving pulley and the driven pulley, and a ball screw mechanism that converts a rotation of the driven pulley into a reciprocating movement of a steering shaft. The ball screw mechanism includes a ball screw nut and a plurality of balls provided inside a spiral ball raceway. ... Jtekt Corporation

02/26/15 / #20150057892

Electric power steering system

A controller of an electric power steering system includes: a basic assist component computing unit (60) that computes a first assist component (ta1*) based on a steering torque (th); a steered angle command value computing unit (61) that computes a steered angle command value (θt*) based on the sum of the steering torque (th) and the first assist component (ta1*); and a steered angle feedback controller (62) that computes a second assist component (ta2*) through feedback control on an actual steered angle (θt). The controller further includes: a correction component computing unit (65) that computes a correction component (tc*) based on a steering angle (θs); and an assist command value computing unit (50) that computes an assist command value (ta*) by subtracting the correction component (tc*) from the sum of the first assist component (ta1*) and the second assist component (ta2*).. ... Jtekt Corporation

02/26/15 / #20150057890

Electric power steering system

In an electric power steering system, a vehicle reactive force model computes a correction spring reactive torque in such a manner that an elasticity component included in a steering reactive force is increased with an increase in a lateral acceleration. As the lateral acceleration increases, an increase in a basic drive torque is suppressed by a larger amount. ... Jtekt Corporation

02/26/15 / #20150057889

Vehicle power steering system

In the vehicle power steering system, a first assist torque component is computed based on a steering torque and a vehicle speed. A target steered angle is computed based on the first assist torque component and the steering torque, and a second assist torque component is set based on the target steered angle and an actual steered angle. ... Jtekt Corporation

02/26/15 / #20150056386

Device for depositing carbon film and method for depositing carbon film

A carbon film deposition apparatus includes a nozzle which has a plurality of outlets for discharging source gas into a process chamber, and which includes a gas introduction pipe defining therein a gas flow path communicating with each of the plurality of outlets. A portion of a pipe wall of the gas introduction pipe corresponding to formation regions of the plurality of outlets is formed to have a stepped shape such that diameters of the gas flow path of the pipe wall become smaller as a distance from a side of supply of source gas by source gas supply means increases.. ... Jtekt Corporation

02/26/15 / #20150053529

Flexible manufacturing system

A flexible manufacturing system that makes it possible to give a higher priority to machining of a workpiece that is a super-urgent item is provided. When a pallet to which a workpiece, which is a super-urgent item, is attached is loaded on a loading station, a second controller gives a command to a conveyor to convey a pallet to which a workpiece, which is a normal item, is attached and which is located at a standby position of a pallet changer to a pallet storage room. ... Jtekt Corporation

02/12/15 / #20150046037

Method for controlling end of travel for electric power-assisted steering

The invention relates to motor vehicles having a power-assisted steering rack. The maximum current strength flowing through the electric power-assistance motor is controlled so as to adapt the assistance torque to the approach of the end-of-travel positions of the rack. ... Jtekt Corporation

02/12/15 / #20150043985

Gear machining apparatus

A gear machining apparatus causes a machining tool and a workpiece to rotate at a high speed in synchronization with each other to machine a highly accurate gear through cutting. The machining tool is manufactured such that each of pitches between tool blades of the machining tool is an integer multiple of a pitch between teeth of the gear, the integer multiple being equal to or larger than double. ... Jtekt Corporation

02/12/15 / #20150043853

Rolling bearing unit

A rolling bearing unit includes: a rolling bearing including an inner ring, an outer ring and a plurality of rolling elements disposed between the inner ring and the outer ring; an annular outer ring spacer disposed adjacent to one axial end of the rolling bearing, the outer ring spacer having a grease reservoir in the form of a groove extending along the circumferential direction of the outer ring spacer, and an opening that provides communication between the grease reservoir and the inside of the rolling bearing; and grease retained in the grease reservoir. Channels are formed in the grease to extend from the opening along the axial direction of the outer ring spacer.. ... Jtekt Corporation

02/05/15 / #20150035539

Power circuit abnormality detection method

A power circuit abnormality detection method for a power circuit detects whether an abnormality in a power source relay exists. The power circuit includes a pre-charge circuit opening and closing a connection between a direct current power source and a smoothing condenser by bypassing the power source relay to pre-charge the smoothing condenser, and a discharge circuit connected in parallel to the smoothing condenser to discharge electric charges stored in the smoothing condenser via a discharge resistance when a discharge switch is closed. ... Jtekt Corporation

02/05/15 / #20150035236

Acrylic rubber composition and sealing device including the same

A sheet contains aem and acm, and the aem and the acm are integrally bonded together. A backbone monomer of the aem is formed of ethylene methyl acrylate, and a crosslinking monomer of the aem has a carboxyl group. ... Jtekt Corporation

02/05/15 / #20150035235

Acrylic rubber composition and sealing device including the same

A sheet is made of acm. A backbone monomer of acm is a mixture of ethyl acrylate and butyl acrylate. ... Jtekt Corporation

02/05/15 / #20150034195

Valve unit

The valve unit includes: a body having a charging passage; a supply-side joint that connects a supply pipe; and a check valve that is disposed in the gas passage, and that inhibits gas from being discharged from the gas tank to the outside of the body. The check valve includes a check valve seat, a check valve element that comes into contact with or moves away from the check valve seat, and a positioning member that fixes the position of the check valve seat in the charging passage. ... Jtekt Corporation

02/05/15 / #20150033891

Ball screw device

A ball screw device includes a screw shaft; a ball nut; a first deflector fitted to an end portion of the ball nut; a ball guide portion that guides balls positioned in a helical inner ball passage formed by the ball nut and the screw shaft, to a first end portion ball passage in the first deflector; the balls that are set to form a row extending in the inner ball passage and the first end portion ball passage; and a first elastic member having a base end that is positioned in the first end portion ball passage and a distal end that is disposed and accommodated in the first end portion ball passage so as to be able to contact the ball positioned at one end of the row of the balls.. . ... Jtekt Corporation

02/05/15 / #20150033877

Torque detecting device and electric power steering system

A torque detecting device includes a permanent magnet; a first magnetic yoke; a second magnetic yoke; two magnetic elements; a terminal; a case; and an external housing. The two magnetic elements are electrically connected to the terminal. ... Jtekt Corporation

01/29/15 / #20150032335

Driving force transmission controller and vehicle control method

A driving force transmission controller includes: a normal turning control unit that computes command values such that driving force transmitted to an outer wheel in a turning direction is larger than that transmitted to an inner wheel during normal turning; a counter-steering control unit that computes the command values such that the driving force transmitted to the outer wheel is larger than that transmitted to the inner wheel during counter-steering; a counter-steering return control unit that corrects the command values such that a rate of change in each of the driving forces transmitted to the right and left rear wheels is lower than a rate of change in a steered angle of front wheels when a steering velocity is equal to or higher than a prescribed value during the counter-steering; and a driving force transmission control unit that controls a driving force transmission device based on the command values.. . ... Jtekt Corporation

01/29/15 / #20150030488

Gear pump

In a gear pump, an outer rotor and an inner rotor are disposed in a rotor installation chamber defined by a pump body and a pump cover. A suction port groove and a discharge port groove are formed in at least one of the pump body and the pump cover. ... Jtekt Corporation

01/29/15 / #20150027258

Ball screw device

A ball screw device includes a piston that surrounds the outer periphery of a ball nut. An outer periphery turning groove is formed in the outer peripheral face of the ball nut. ... Jtekt Corporation

01/29/15 / #20150027248

Electric power steering system

In a speed reducer of an electric power steering system, a first bearing supports a first end portion of a worm so that the first end portion is movable in an axial direction. Elastic members elastically support the worm in the axial direction. ... Jtekt Corporation

01/22/15 / #20150025763

Driving force transmission control system

A driving force transmission control system includes: an electric motor; a multi-disc clutch; a cam mechanism that converts rotation output from the electric motor into cam thrust force that is axial force in the axial direction of the multi-disc clutch; a pressure-conversion mechanism that converts reaction force against the cam thrust force into pressure of a fluid; a pressure sensor that detects the pressure; and a control unit that computes a command value of a current supplied to the electric motor. The control unit stores the pressure of the fluid during disengagement of the multi-disc clutch, and computes the current command value based on the pressure of the fluid to which the reaction force against the cam thrust force has been applied, and the stored pressure of the fluid.. ... Jtekt Corporation

01/22/15 / #20150024855

Tripod constant velocity joint and method of producing the same

A roller includes: an outer peripheral rolling contact surface which is shaped by a simultaneous process in a state where end faces of a plurality of rollers are in contact with each other; and a protrusion which is axially protruded further than an axial end of the outer peripheral rolling contact surface. The protrusion has a protruded end face which, when the outer peripheral rolling contact surface is ground, is in contact with the end face of one of the rollers which are adjacent to each other, and forms an axial gap between ends of the outer peripheral rolling contact surfaces of the rollers which are adjacent to each other, in a state where the protruded end face is in contact with the end face. ... Jtekt Corporation

01/22/15 / #20150021890

Steering apparatus

A steering apparatus includes an engaging portion movable in a predetermined moving direction at a time of a secondary collision; a fixation portion fixed to a vehicle body; and an absorbing member. The absorbing member includes a fixed portion fixed to the fixation portion, an engaged portion facing the engaging portion, and a connecting portion that includes a curved portion and connects the fixed portion and the engaged portion. ... Jtekt Corporation

01/22/15 / #20150021828

Rubber vulcanizer and rubber vulcanizing method

A rubber vulcanizer includes: a pair of heat plates disposed to be opposed to each other in a prescribed direction and to be apart from each other in the prescribed direction; and one or more dies for rubber molding stacked on each other in the prescribed direction between the heat plates. The rubber vulcanizer is able to realize either a state in which the dies of which the number is n are stacked on each other in the prescribed direction between the heat plates, or a state in which the dies of which the number is (n+1) are stacked on each other in the prescribed direction between the heat plates, where n is a natural number that satisfies at least a condition that 1≦n≦m, and m is a certain positive integer.. ... Jtekt Corporation

01/22/15 / #20150020618

Rack bush

A rack bush, which constitutes a rack and pinion type steering system and supports a rack shaft in which rack teeth are formed at one circumferential portion, includes a bush main body and a rigidity reducing portion. The bush main body has an annular shape into which the rack shaft is inserted. ... Jtekt Corporation

01/15/15 / #20150015169

Onboard motor controller

There is provided an onboard motor controller that starts a failsafe process in short time at a vehicle collision. A control circuit in the motor controller acquires an acceleration detected by an acceleration sensor. ... Jtekt Corporation

01/08/15 / #20150012180

Electric power steering system

An electric power steering system includes a motor that generates an assist force; and an ecu that computes a basic current command value corresponding to the assist force, based on a steering torque, and that controls the motor based on the basic current command value and a stabilization current command value computed by an external sc controller so as to stabilize behavior of a vehicle when the behavior of the vehicle is unstable. When the stabilization current command value is input, the ecu determines whether the behavior of the vehicle is stable, and when it is determined that the behavior of the vehicle is stable, the ecu controls the motor based on the basic current command value without using the stabilization current command value.. ... Jtekt Corporation

01/08/15 / #20150012126

Thermal displacement correction method and thermal displacement correction unit

A thermal displacement correction method for a machine tool includes: estimating a thermal displacement of a support and a thermal displacement of the movable body independently of each other; acquiring a displacement of an attachment position of a scale that detects a position of the movable body; a movable body actual position acquiring step of acquiring an actual position of the movable body relative to the support after thermal deformation of the movable body; computing a degree of inclination of the movable body at the actual position; acquiring a resultant displacement that is a resultant of the thermal displacement of the support and the thermal displacement of the movable body; computing a correction value based on the resultant displacement; correcting a command position of the movable body based on the correction value.. . ... Jtekt Corporation

01/08/15 / #20150010408

Motor control apparatus and electric pump unit

A control unit includes an excessive output suppression control unit which suppresses an excessive output by reducing a current command value from a host control apparatus. A control signal output unit obtains a motor control signal by adding a reduction amount of the current command value to the current command value. ... Jtekt Corporation

01/08/15 / #20150010258

Cage and method of assembling cage

Each pipe member has a plurality of slits located at intervals in the circumferential direction of the pipe member, extending in the axial direction of the pipe member, and extending through the pipe member in the radial direction of the pipe member. The pipe members are passed through through-holes of the first annular member and through-holes of the second annular member aligned with the through-holes of the first annular member. ... Jtekt Corporation

01/08/15 / #20150008066

Electric power steering system

An electric power steering system includes: an assist motor that generate assist force for assisting steering of a steering member; a motor drive circuit that controls driving of the assist motor; a capacitor that is electrically connected to a main power supply that supplies electric power to the assist motor, the motor drive circuit, and electrical components; and a controller that controls charging and discharging of the capacitor. The controller discharges electricity to the electrical components when an amount of electric charge remaining in the auxiliary power supply is equal to or greater than a first threshold value in an engine start-up period in a vehicle.. ... Jtekt Corporation

01/01/15 / #20150003765

Bearing unit

A dust cover disposed on an outer periphery of an outer ring member of a bearing unit has a generally disc shape as viewed from an axial direction of the bearing unit. The dust cover has an outside ring portion, a short cylinder portion that extends toward an outboard side from an inner peripheral edge of the outside ring portion, and an inside ring portion that extends radially inward from a distal end of the short cylinder portion. ... Jtekt Corporation

01/01/15 / #20150000135

Blank and method of manufacturing rack shaft using the same

A blank is provided with a first shaft portion, a second shaft portion, and a machining target portion. The machining target portion is formed at a position closer to a shaft end portion of the first shaft portion than a shaft end portion of the second shaft portion. ... Jtekt Corporation








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