Patents Assigned to JTEKT
  • Roller bearing
    Patent number: 9958009
    Abstract: A roller bearing includes an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring, an outer ring arranged concentric with and peripherally outside the inner ring and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner, and a cage that holds the rollers at predetermined intervals along a circumferential direction. Opposite end portions of the outer-ring raceway surface in an axial direction serve as guide surfaces or which rotation of the cage is guided. Or an outer periphery of the cage, slidable contact surfaces are formed which slidably contact the guide surfaces and which are arranged to face the respective guide surfaces across a labyrinth clearance.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Yuki Shishihara, Shigeo Kamamoto, Junji Murata
  • Method for heating a metal member, method for bonding heated metal members, and apparatus for heating a metal member
    Patent number: 9960144
    Abstract: A heating method includes an oxide film forming step and a heating step. The thickness of an oxide film is set in a first range that includes a first maximal thickness and a second maximal thickness and that is smaller than a second minimal thickness in the relationship with the laser absorption having a periodic profile. The first maximal thickness corresponds to a first maximal value a of the laser absorption. The second maximal thickness corresponds to a second maximal value of the laser absorption. The second minimal thickness corresponds to a second minimal value of the laser absorption, namely the minimal value of the laser absorption that appears between the second maximal value and a third maximal value, or the maximal value of the laser absorption that appears subsequent to the second maximal value.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Takaya Nagahama, Koichi Shiiba, Yoshinori Imoto
  • Inverter, motor control apparatus, and power steering system
    Patent number: 9956989
    Abstract: An inverter includes a positive electrode terminal and a negative electrode terminal, upper-arm switching elements and lower-arm switching elements, and a voltage divider that supplies partial voltages of a voltage between the positive electrode terminal and the negative electrode terminal to a gate and a drain, respectively, of the lower-arm switching element. The lower-arm switching element includes an HEMT. In the voltage divider, the partial voltages are set to turn the lower-arm switching element off when a positive electrode and a negative electrode of a DC power supply are reversely connected to the positive electrode terminal and the negative electrode terminal, respectively.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Kitamoto
  • Method for assembling wheel bearing apparatus
    Patent number: 9956819
    Abstract: A method for assembling a wheel bearing apparatus includes disposing a positioning jig such that a lateral face of the positioning jig on one side in an axial direction contacts a lateral face of a hub flange on a side of a slinger, the positioning jig having a ring shape separated into a plurality of partial portions arranged in a circumferential direction, a width of the positioning jig in the axial direction being equal to a distance between a lateral face of a disc portion on a side of the hub flange and a lateral face of the hub flange on the side of the slinger, the distance being set to obtain an appropriate interference; and attaching the slinger such that the lateral face of the disc portion on the side of the hub flange contacts a lateral face of the positioning jig on another side in the axial direction.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Yoshito Takada
  • Steering system
    Patent number: 9956984
    Abstract: A column jacket includes a pair of facing portions facing each other, and a stepped portion which extends in a direction that intersects with a column axial direction and at which an outer surface of the corresponding facing portion projects outward halfway toward an end side of the column jacket. Tilt grooves are formed in respective side plates of an upper bracket fixed to a vehicle body. A clamping mechanism including a clamping shaft inserted through the tilt grooves clamps the side plates to bend the side plates such that an end of each side plate on the extending direction upper side is displaced toward the corresponding facing portion. The stepped portion is located between a fulcrum portion serving as a fulcrum when the corresponding side plate is bent by being clamped by the clamping mechanism and the corresponding tilt groove, in an extending direction of the side plates.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Satoki Yoshimura
  • Manufacturing method of bar component and bar component
    Patent number: 9956987
    Abstract: 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.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 1, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Takeshi Kunishima
  • Grease Composition and Rolling Bearing in Which Grease Composition is Sealed
    Publication number: 20180112147
    Abstract: There is provided a grease composition containing a base oil including an ester oil, and a thickener including diurea represented by formula (1) below: wherein the thickener including the diurea is contained in an amount of 18% by mass or less.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 26, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Kazunori MIYAKE, Tomotaka NAKAGAWA
  • BALL SCREW APPARATUS
    Publication number: 20180112752
    Abstract: 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. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.
    Type: Application
    Filed: December 21, 2017
    Publication date: April 26, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Gento ARAMOTO, Naoko SAKAGUCHI
  • Rolling Bearing
    Publication number: 20180112715
    Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage. An annular groove for creep suppression is formed in a fitting surface of the outer ring to be fitted with a mating member (housing) to which the outer ring is to be mounted. An outer ring track groove with which the balls make rolling contact is formed in the inner peripheral surface of the outer ring on the side opposite to the fitting surface. The entire contact ellipse generated when each of the balls and the outer ring track groove contact each other is positioned within the axial range of the outer ring in which the annular groove is formed.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 26, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Yasuhiko ISHII, Yuu YASUDA
  • Rolling bearing
    Patent number: 9951813
    Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and an annular cage. The cage has an annular portion provided on a first side in an axial direction with respect to the balls and a plurality of cage bars. Pockets that house the balls are each formed between the cage bars adjacent to each other in a circumferential direction. An axially-first-side side surface of the annular portion has a first surface that is inclined toward the first side in the axial direction as the first surface extends outward in a radial direction and a second surface provided outward of the first surface in the radial direction and positioned on the second side in the axial direction with respect to an extended virtual plane of the first surface.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: April 24, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Youzou Taniguchi, Takashi Iwata
  • Use of a power-steering motor to simulate an end-of-travel stop for said steering
    Patent number: 9950735
    Abstract: A method for managing a power-steering motor configured to supply a force to assist the movement of a steering rack involves the steering rack being mounted such as to be movable between at least a first position and a second position in order to be able to change the steering angle of a steered wheel. The method includes the steps of defining a virtual end-of-travel threshold strictly between the first position and the second position. If the rack is detected as having crossed the virtual end-of-travel threshold in a predetermined crossing direction, simulating, by the power-steering motor, an end-of-travel stop by including in the assistance instruction a resistance instruction that simulates the effect of a mechanical stop, such as a spring-damper or a mass-spring-damper, preventing the actuator member from progressing further beyond the virtual end-of-travel threshold.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: April 24, 2018
    Assignee: JTEKT EUROPE
    Inventors: Julien Barthomeuf, Pascal Moulaire, Pierre-Willem Pilaz
  • Rolling bearing apparatus
    Patent number: 9945422
    Abstract: 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. The tank is provided with a holding material for the lubricant, the holding material having minute pores. The holding material includes a first holding portion provided in a region on an outlet-side of the tank, and a second holding portion provided in a part other than the region and having a porosity higher than that of the first holding portion.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: April 17, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Kiyoshi Tanimoto, Boyko Stoimenov
  • Steering apparatus
    Patent number: 9944310
    Abstract: A column jacket includes an outer jacket and an inner jacket that are slidable relative to each other in the axial direction for telescopic adjustment. The inner jacket has an outer peripheral surface fitted to an inner peripheral surface of the outer jacket. A base end of an engaging member is fixed to the inner jacket. The inner peripheral surface of the outer jacket includes a guide groove, and a stopper provided at an end of the guide groove. The stopper restricts disconnection of the inner jacket from the outer jacket when being engaged with the engaging member. The engaging member is engaged with the guide groove, and the guide groove guides axial movement of the inner jacket via the engaging member. The guide groove has a bottom portion that faces a distal end of the engaging member.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: April 17, 2018
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuro Kubota, Yuji Takahashi, Tomonori Sugiura, Shoji Ishimura, Shigeru Hoshino
  • Circuit board assembly and method for manufacturing the same
    Patent number: 9948035
    Abstract: Provided are a circuit board assembly that can prevent contact between connection terminals due to whiskers even if whiskers grow from the connection terminals and a method for manufacturing an insert molded product. A cover body of a circuit board assembly has a plurality of partition walls that form a plurality of grooves each accommodating a corresponding one of connection terminals. The partition walls restrain the inner surface of a second cover of the cover body from entering the grooves when an external pressure is applied to a part of the cover body which covers the connection terminals. The partition walls also prevent contact between adjoining ones of the connection terminals when whiskers grow.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: April 17, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Yuichi Toyama
  • Steering apparatus
    Patent number: 9944311
    Abstract: A steering apparatus includes a steering shaft; a column jacket including an outer jacket including a slit and a pair of fastened portions, and an inner jacket; a fastening mechanism; an engaged tooth formation member including at least one engaged tooth and fixed to the inner jacket; a support shaft including end portions supported by support holes of the fastened portions; a tubular reinforcing member fitted to an outer peripheral surface of the support shaft at a prescribed area between the pair of end portions; and an engaging tooth formation member including an engaging tooth that engages with the engaged tooth.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: April 17, 2018
    Assignees: JTEKT CORPORATION, Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuro Kubota, Tomonori Sugiura, Yuji Takahashi, Shoji Ishimura, Shigeru Hoshino
  • FOUR-WHEEL DRIVE VEHICLE AND CONTROL APPARATUS FOR FOUR-WHEEL DRIVE VEHICLE
    Publication number: 20180099563
    Abstract: 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.
    Type: Application
    Filed: October 5, 2017
    Publication date: April 12, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Tomohiro NOZU, Go NAGAYAMA, Shotaro NIIMI, Akiyoshi KAKITA, Kotaro SARAI
  • Steering Assist Apparatus
    Publication number: 20180099692
    Abstract: 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.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 12, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Toshiaki OYA
  • BALL SCREW DEVICE, METHOD OF MANUFACTURING BALL SCREW DEVICE, AND STEERING SYSTEM
    Publication number: 20180100566
    Abstract: 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. Mounting holes each have a pair of circumferentially facing surfaces that face toward each other in the circumferential direction of the nut and parallel to each other. When a plane passing through the center point of an opening in one end of a second circulation path in each of the pair of deflectors and the axis of the nut is defined as a reference plane, an intersection line between an imaginary perpendicular plane perpendicular to the axis and the pair of circumferentially facing surfaces has an angle with respect to the reference plane.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 12, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Eiji YAMAZAKI, Masayuki TSUKAGOSHI
  • DIFFERENTIAL DEVICE
    Publication number: 20180099562
    Abstract: 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. The clutch member includes a second engaging part. An urging member is disposed between the second side wall and the clutch member such that the urging member is compressed in the axial direction. When an actuator does not generate a pressing force, the first engaging part and the second engaging part are engaged with each other by the urging force of the urging member, and the differential case and the input member are connected together via the clutch member. The first engaging part is disengaged from the second engaging part by the pressing force provided due to actuation of the actuator.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 12, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Tadashi YOSHISAKA, He Jin, Yasunori Kamitani
  • Vehicle Steering Device
    Publication number: 20180099690
    Abstract: 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. The second control mode is a mode in which the left steering ECU controls the left steering motor by torque feedback control so that the steered angle of the left steered wheel becomes equal to an angle corresponding to a neutral position of the left steered wheel. The switching control unit normally sets the control mode to the first control mode. The switching control unit switches the control mode to the second control mode if abnormal communication occurs between the higher-level control device and the left steering ECU.
    Type: Application
    Filed: September 27, 2017
    Publication date: April 12, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Toshiaki OYA