Patents Assigned to JTEKT
  • Sensor device
    Patent number: 11300464
    Abstract: A sensor device includes a partial assembly, a circuit board, and a sensor housing. The partial assembly is constituted by selectively mounting a part that is at least one of a magnetism collection member and a driven wheel to a holder. The circuit board is provided with a detector configured to detect at least one of magnetic flux induced by the magnetism collection member and a rotational angle of the driven wheel in accordance with the part mounted to the holder. The sensor housing is penetrated by the shaft, and houses the partial assembly and the circuit board.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: April 12, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Yuichi Toyama
  • BALL SCREW DEVICE
    Publication number: 20220107010
    Abstract: A ball screw device includes a threaded shaft, a nut, and balls. The nut body includes a central tubular portion and an end tubular portion. The central tubular portion has a through-hole and an end surface. The nut further includes a circulation member and a snap ring. The circulation member is provided on an inner peripheral side of the end tubular portion such that the circulation member is in contact with the end surface. The snap ring is fitted to a circumferential groove provided on an inner periphery of the end tubular portion. The snap ring is configured to fix the circulation member in a manner such that the circulation member is sandwiched between the snap ring and the end surface.
    Type: Application
    Filed: October 1, 2021
    Publication date: April 7, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Akiyoshi TASHIRO, Ikuo YAMAMOTO
  • Vehicle drive device
    Patent number: 11293524
    Abstract: A vehicle drive device includes: an input shaft that receives a driving force of a driving source and that is provided with a first gear; an intermediate shaft that is provided with a second gear meshing with the first gear and a third gear located next to the second gear in a direction of a rotation axis and that is disposed in such a manner that the intermediate shaft is allowed to move in the direction of the rotation axis; an output shaft that is provided with a fourth gear meshing with the third gear; a first gear pair including the first and second gears; and a second gear pair including the third and fourth gears. One of the first gear pair and the second gear pair includes a helical gear, and the other of the first gear pair and the second gear pair includes a double helical gear.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: April 5, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Yoshinori Suzuki
  • STEERING CONTROL DEVICE AND STEERING SYSTEM
    Publication number: 20220097757
    Abstract: A steering control device includes a target torque generator configured to generate a target torque which is a target value of the motor torque and a control signal generator configured to generate a control signal for controlling the motor such that the motor torque corresponding to the target torque is generated. The target torque generator includes a pre-adjustment axial force calculator, a first axial force calculator, a second axial force calculator, a post-adjustment axial force calculator, and a target torque calculator. The post-adjustment axial force calculator is configured to set a proportion of a first axial force contributing to a post-adjustment axial force to be smaller when a state of a vehicle speed is abnormal than when the state of the vehicle speed is normal.
    Type: Application
    Filed: September 24, 2021
    Publication date: March 31, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yusuke KAKIMOTO, Takashi KODERA, Yoshio KUDO
  • STEERING CONTROL DEVICE
    Publication number: 20220097761
    Abstract: A steering control device includes a target torque generating unit configured to generate a target torque which is a target value of a motor torque. The target torque generating unit includes an axial component calculating unit. The axial component calculating unit includes a first calculation system configured to calculate a vehicle-speed-based axial force, a second calculation system configured to calculate an other-state-quantity-based axial force, and an output switching unit. The output switching unit is configured to output the vehicle-speed-based axial force as the axial component by validating the first calculation system when a state of the vehicle speed is normal and to output the other-state-quantity-based axial force as the axial component by validating the second calculation system when the state of the vehicle speed is abnormal.
    Type: Application
    Filed: September 27, 2021
    Publication date: March 31, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Yusuke KAKIMOTO, Takashi KODERA
  • BEARING DEVICE AND ROTARY DEVICE USING BEARING DEVICE
    Publication number: 20220099140
    Abstract: A bearing device includes a rotational shaft; a first outer ring; a second outer ring; first balls; second balls disposed; and a C-spacer and a second spacer. ?>?d is satisfied, where ?d represents a difference between an inside diameter of the second spacer at an end portion on a second side and an outside diameter of a shaft outer circumferential face, and a represents a half of a difference between a diameter of a cylindrical face of the C-spacer on an outer circumferential side and a diameter of the cylindrical face of the C-spacer on an inner circumferential side.
    Type: Application
    Filed: September 23, 2021
    Publication date: March 31, 2022
    Applicant: JTEKT CORPORATION
    Inventors: Jun MATSUNAMI, Kouichi OKUDA
  • Vehicle drive device
    Patent number: 11285933
    Abstract: A vehicle drive device includes a control device, and the control device controls an electric motor, a first pressing mechanism and a second pressing mechanism such that a relational expression of T<T1+T2 is satisfied, where T represents a torque that is input to an input rotation member, T1 represents a maximum of a torque that is able to be transmitted by a first multi-disc clutch and T2 represents a maximum of a torque that is able to be transmitted by a second multi-disc clutch.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: March 29, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Toshihiko Yamamoto, Tetsuya Yamazaki, Wataru Hirata, Shotaro Niimi, Tomoaki Kato
  • Tapered roller bearing and cage
    Patent number: 11286978
    Abstract: A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and an annular cage having a plurality of cage pockets. Each of the cage pockets has a retainer configured to permit displacement of the tapered roller in a direction with a component in a radial direction, and restrict detachment of the tapered roller to an outer side in the radial direction by bringing the retainer into contact with a part of an outer peripheral surface of the tapered roller. The cage pockets include a first cage pocket having a first retainer with which a permissible amount of the displacement is a first displacement amount, and a second cage pocket having a second retainer with which the permissible amount of the displacement is a second displacement amount smaller than the first displacement amount.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: March 29, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yuka Sato, Ichiro Kojima, Tomoyuki Aida, Atsushi Naitou, Kanichi Koda
  • Driving force distribution device
    Patent number: 11285806
    Abstract: A driving force distribution device includes a first output rotational member and a second output rotational member, an input rotational member, a first multiple disc clutch, a second multiple disc clutch, a pressure receiving member, a first pressing mechanism and a second pressing mechanism. The pressure receiving member includes an annular base portion and a plurality of projecting pieces, the projecting pieces include a plurality of first projecting pieces and a plurality of second projecting pieces. The first projecting pieces each have a first pressure receiving surface, the second projecting pieces each have a second pressure receiving surface.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: March 29, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Noriyuki Fujii
  • WET FRICTION DISC
    Publication number: 20220090639
    Abstract: A wet friction disc includes a lubrication groove and a plurality of lands defined by the lubrication groove. The lubrication groove has a plurality of circumferential groove portions that extends in a circumferential direction and has a predetermined groove width in a radial direction, and a plurality of intersecting groove portions that extends in directions intersecting the circumferential direction. At least some of the circumferential groove portions have an arc shape such that an end in the circumferential direction is located adjacent to one of the lands in the circumferential direction and that the groove width is entirely contained within a range in the radial direction spanned by that land.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 24, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiki TAKEUCHI, Hiroshi TAKUNO, Kazuaki KAMIMURA, Takeshi NAKAMURA, Takahiro YOSHIMURA
  • STEERING CONTROL DEVICE
    Publication number: 20220089218
    Abstract: A steering control device controls a turning motor that generates a turning force for causing turning wheels of which power transmission to and from a steering wheel is cut off to turn. The steering control device includes a first processor configured to change a steering angle ratio which is a ratio of a turning angle of the turning wheels to a steering angle of the steering wheel according to a vehicle speed through control of the turning motor and a second processor configured to change a degree of change of the steering angle ratio with respect to change of the vehicle speed according to a steering state or a vehicle state.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 24, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi KODERA, Toru TAKASHIMA
  • STEERING CONTROL DEVICE
    Publication number: 20220089217
    Abstract: A steering control device includes a control unit configured to control at least an operation of a steering-side motor. The control unit is configured to calculate a target reaction torque; calculate a difference axial force that is used to limit steering for turning the turning wheels in a predetermined direction, the difference axial force being reflected in the target reaction torque; and set a reference angle to one of a steering angle and a turning angle, set a converted angle to an angle obtained by converting another of the steering angle and the turning angle according to a steering angle ratio, and calculate the difference axial force based on a difference between the reference angle and the converted angle.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 24, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Isao NAMIKAWA, Satoshi MATSUDA, Tomoyuki IIDA, Yoshio KUDO, Masaharu YAMASHITA, Kenji SHIBATA
  • TURN ASSIST DEVICE FOR VEHICLE, TURN ASSIST METHOD FOR VEHICLE, AND COMPUTER-READABLE MEDIUM STORING TURN ASSIST PROGRAM
    Publication number: 20220089149
    Abstract: A turn assist device is configured to execute a turn assist process that assists turning of a vehicle in a case in which a steering operation of a steering wheel is in progress in a situation in which collision prediction time is shorter than or equal to determination prediction time. The turn assist process includes: an in-phase process that outputs a command for steering a rear wheel in the same direction as a steering direction of a front wheel, and a counter-phase process that outputs a command for steering the rear wheel in a direction opposite to the steering direction of the front wheel when a difference between an actual value of the lateral acceleration of the vehicle and a lateral acceleration target value exceeds a difference determination value during execution of the in-phase process.
    Type: Application
    Filed: September 2, 2021
    Publication date: March 24, 2022
    Applicants: ADVICS CO., LTD., DENSO CORPORATION, AISIN CORPORATION, JTEKT CORPORATION, J-QuAD DYNAMICS INC.
    Inventor: Yosuke OMORI
  • STEERING CONTROL DEVICE
    Publication number: 20220089214
    Abstract: A steering control device controls a reaction motor that generates a steering reaction force applied to a steering wheel of which power transmission to and from turning wheels is cut off. the steering control device includes: a first processor configured to change a virtual operation range of the steering wheel according to a steering state or a vehicle state by controlling the reaction motor; and a second processor configured to change a degree of change of the virtual operation range of the steering wheel according to the steering state or the vehicle state when an operation position of the steering wheel reaches a position in a vicinity of a limit position of the virtual operation range.
    Type: Application
    Filed: September 17, 2021
    Publication date: March 24, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi KODERA, Toru TAKASHIMA
  • WET FRICTION DISC AND FRICTION ENGAGING DEVICE
    Publication number: 20220090638
    Abstract: A wet friction disc includes a friction surface and a lubrication groove through which a lubricant supplied to the friction surface flows. The lubrication groove has a plurality of circumferential groove portions that extends in a circumferential direction and a plurality of intersecting groove portions that extends in directions intersecting the circumferential direction. At least one of the circumferential groove portions has a through-hole that extends through the wet friction disc between an opposite surface facing s mating member and a surface on the opposite side in an axial direction.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 24, 2022
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiki TAKEUCHI, Hiroshi TAKUNO, Kazuaki KAMIMURA, Takeshi NAKAMURA, Takahiro YOSHIMURA, Masaya MICHISHITA
  • TURNING CONTROLLER FOR VEHICLE, COMPUTER-READABLE MEDIUM STORING TURNING CONTROL PROGRAM, AND TURNING CONTROL METHOD FOR VEHICLE
    Publication number: 20220089150
    Abstract: A turning controller for a vehicle is configured to execute: a time obtaining process that obtains collision prediction time; a lateral movement amount determining process that determines whether a target lateral movement amount is greater than or equal to a lateral movement amount determination value; and an automatic turning process that, in a case in which the collision prediction time is shorter than or equal to a determination prediction time, outputs a command for steering the front wheel to the front wheel steering device and outputs a command for steering the rear wheel to the rear wheel steering device, in order to avoid a collision between the vehicle and the obstacle; a counter-phase process in the automatic turning process in a case in which the target lateral movement amount is determined to be greater than or equal to the lateral movement amount determination value.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 24, 2022
    Applicants: ADVICS CO., LTD., DENSO CORPORATION, AISIN CORPORATION, JTEKT CORPORATION, J-QuAD DYNAMICS INC.
    Inventor: Yosuke OMORI
  • Steering column device
    Patent number: 11279392
    Abstract: A steering column device includes a cylindrical inner tube, and a cylindrical outer tube which is fixed to the inner tube by being externally fitted to slide in an axial direction of the inner tube and being elastically reduced in diameter, wherein the outer tube is configured to have a first slit and a second slit to be reduced in diameter. A stress alleviation portion is provided at the second slit. A contour shape of the stress alleviation portion is set to include an elliptic arc-shaped portion of which a direction of a major axis is a direction intersecting the second slit.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: March 22, 2022
    Assignees: JTEKT CORPORATION, FUJI KIKO CO., LTD.
    Inventors: Tomonori Sugiura, Kentaro Kikuiri, Yuta Kiguchi, Kota Higuchi
  • Motion assisting device
    Patent number: D946771
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: March 22, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Hisataka Sato, Atsushi Ando, Hiromichi Ohta, Nobuaki Shibata, Frédéric Dandault-Kamitani, Takane Mitomi
  • Motion assisting device
    Patent number: D947388
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: March 29, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yoshinobu Katoh, Hiromichi Ohta, Kazuyoshi Ohtsubo, Yuki Kobayashi, Shintaro Yoshida, Katsuhide Kikuchi, Mikio Shinohara
  • Motion assisting device
    Patent number: D947390
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: March 29, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yoshinobu Katoh, Hiromichi Ohta, Kazuyoshi Ohtsubo, Yuki Kobayashi, Shintaro Yoshida, Katsuhide Kikuchi, Mikio Shinohara