Patents Assigned to JTEKT
  • Patent number: 11327921
    Abstract: A programmable controller includes a plurality of modules arranged along a predetermined arrangement direction, and the plurality of modules includes a master station module and slave station modules. The programmable controller includes a main line configured to provide communication between the master station module and the slave station modules, and sub-lines configured to provide communication between two adjacent modules. The programmable controller sets station numbers of the slave station modules by communication via the sub-lines, and then performs communication via the main line using the set station numbers.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: May 10, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Takanori Ito
  • Patent number: 11325637
    Abstract: A steering system includes a steering operation shaft, a lower shaft, an upper shaft, and an intermediate shaft. The intermediate shaft includes a tubular member including a hollow portion; and a shaft member. An oil groove that retains lubricating oil is provided in a predetermined range in an axial direction of the intermediate shaft on at least one of an outer peripheral surface of the shaft member at a part housed in the hollow portion and an inner peripheral surface of the hollow portion of the tubular member. A sectional area of the oil groove in an upper shaft-side part of the predetermined range is larger than a sectional area of the oil groove in a lower shaft-side part of the predetermined range, the upper shaft-side part being located on a side of the upper shaft, and the lower shaft-side part being located on a side of the lower shaft.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: May 10, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yasunori Kamitani, Gaku Takimoto
  • Patent number: 11325636
    Abstract: A steering column device includes an inner tube, a housing, and a lock mechanism configured. The lock mechanism includes a first engagement member, a second engagement member, a first urging member, a second urging member, a cam member configured to rotate about a rotation axis extending in a direction in which the first urging member and the second urging member are arranged such that the second urging member serving as a follower is moved in the direction in which the first urging member and the second urging member are arranged to change a magnitude relationship between an urging force of the first urging member and an urging force of the second urging member, and an operation lever configured to operate the cam member.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: May 10, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Susumu Imagaki, Masayoshi Sakuda, Takahiro Baito, Takuya Adachi, Kota Higuchi, So Tanaka, Kazuki Fujiwara, Kenji Utsunomiya
  • Patent number: 11319605
    Abstract: A heat treatment apparatus that thermally treats an annular workpiece formed of a steel material by inductively heating the workpiece includes a treatment tank in which the workpiece is set and thermally treated, a holding portion that holds the workpiece at a predetermined position, an induction heating coil that surrounds the workpiece to inductively heat the workpiece, and a cooling medium that cools surfaces of the workpiece during the induction heating of the workpiece.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 3, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Wataru Yoshida, Towako Matsui, Katsuhiko Kizawa, Takashi Sada, Tsuyoshi Mikami
  • Patent number: 11319990
    Abstract: A rolling bearing device includes a rolling bearing that includes an outer ring having an inner peripheral surface on which a first raceway surface is provided, an inner ring having an outer peripheral surface on which a second raceway surface is provided, and rolling elements interposed between the first and the second raceway surfaces; a strain sensor configured to detect a strain of the rolling bearing; and a fixation portion configured to fix the strain sensor to a peripheral surface that includes at least one of an outer peripheral surface of the outer ring and an inner peripheral surface of the inner ring. The fixation portion fixes at least two locations in the strain sensor to the peripheral surface such that a detection region of the strain sensor and the peripheral surface are not fixed to each other, the at least two locations facing each other across the detection region.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: May 3, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Takahito Hieda, Naoki Tani
  • Patent number: 11320176
    Abstract: A thermoacoustic device includes a loop tube in which a working gas is sealed; a stack in which a temperature gradient is generated in a tube axis direction of the loop tube, the stack being provided in the loop tube; and a diaphragm structure including a diaphragm provided in the loop tube and an operation unit, the diaphragm having a surface extending in a direction intersecting the tube axis direction and being configured to vibrate with a component of vibration in the tube axis direction, and the operation unit being configured to apply a physical quantity that is required, to the diaphragm to change a rigidity of the diaphragm in the tube axis direction.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: May 3, 2022
    Assignees: JTEKT CORPORATION, UNIVERSITY PUBLIC CORPORATION OSAKA
    Inventors: Tatsuma Kouchi, Tomoyuki Takei, Kunio Ohara, Hiroki Tanaka, Osamu Ishikawa
  • Patent number: 11318982
    Abstract: A steering column device includes a metal outer-side cylindrical member, a metal inner-side cylindrical member, and a resin intermediate cylindrical member that is disposed between the outer-side cylindrical member and the inner-side cylindrical member. The intermediate cylindrical member has an oil feed orifice through which the semisolid lubricating oil is guided from an outer circumferential face side to an inner circumferential face side when inserting the intermediate cylindrical member into the outer-side cylindrical member.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: May 3, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Hidenori Kakinuma, Yasunori Kamitani, Soma Iwai, Keiji Kishimoto
  • Patent number: 11318987
    Abstract: A steering controller includes processing circuitry configured to execute a torque control process that calculates a steering-side operation amount, an angle feedback control process that calculates an angle-side operation amount, and an operation process that operates a drive circuit of an electric motor to adjust torque of the electric motor to a torque command value. The processing circuitry is further configured to execute a switch process that switches, when determining that a controllability of the electric motor is less than or equal to a predetermined efficiency, the torque command value from a value based on the angle-side operation amount to a value based on the steering-side operation amount instead of the angle-side operation amount.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: May 3, 2022
    Assignees: JTEKT CORPORATION, JTEKT EUROPE S.A.S.
    Inventors: Terutaka Tamaizumi, Tahar Slama, Pascal Moulaire, Pierre Larminy
  • Patent number: 11319994
    Abstract: A thrust roller bearing includes a plurality of radially arranged rollers, and a pair of annular washers having raceway surfaces on which the rollers roll, the raceway surfaces being arranged to face each other. The roller is made of high-carbon chromium bearing steel, and contains 1.1 mass % to 1.6 mass % of carbon and 0.1 mass % to 0.6 mass % of nitrogen in a range of 0.1 mm from a surface. A surface compressive residual stress is smaller than ?900 MPa, a surface roughness is 0.01 to 0.10 in terms of Rvk and 0.01 to 0.08 in terms of Rk, and a Vickers hardness of the surface is 860 to 980. At least one of the washers is made of carbon steel, and surface roughnesses of the raceway surfaces are 0.05 to 0.20 in terms of Rvk and 0.08 to 0.15 in terms of Rk.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: May 3, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Keisuke Kokubun, Yoshihito Nakashima, Taizou Wakayama, Shingo Watanabe
  • Publication number: 20220126911
    Abstract: A method for the control of a power steering system includes a first drive and a second drive which are arranged in parallel and implement an evaluation and regulation step calculating the first compensation request and the second compensation request as a function of the first deviation and of the second deviation.
    Type: Application
    Filed: January 29, 2020
    Publication date: April 28, 2022
    Applicant: JTEKT EUROPE
    Inventors: Guillaume CARPENTIER, Bertrand PERRET
  • Patent number: 11312409
    Abstract: A steering control device includes an electronic control unit configured to calculate a d-axis current command value and a q-axis current command value for a motor having three phases configured to generate drive power applied to a shaft interlocked with turning wheels, to convert detected current values in the phases of the motor to a d-axis current value and a q-axis current value, and to perform feedback control. The electronic control unit is configured to perform field weakening control for setting the d-axis current command value to a negative value based on a rotation speed of the motor, to determine whether the motor is in a regenerative state, and to calculate the d-axis current command value according to the regenerative state of the motor when the electronic control unit determines that the motor is in the regenerative state.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: April 26, 2022
    Assignee: JTEKT CORPORATION
    Inventor: Hisataka Kato
  • Patent number: 11313421
    Abstract: A vehicle drive device includes: an electric motor; a multi-plate clutch including a plurality of clutch plates; a pressing mechanism configured to press the multi-plate clutch; an output rotary member to which a drive force of the electric motor is transferred through the multi-plate clutch; and a control device configured to control the electric motor and the pressing mechanism. The control device is configured to control the pressing mechanism using information on the result of test operation performed while the vehicle is stationary.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: April 26, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Wataru Hirata, Tetsuya Yamazaki
  • Patent number: 11311953
    Abstract: A machine tool that generates internal teeth or external teeth on a cylindrical workpiece includes a workpiece holder, a column which is relatively movable to the workpiece holder, a rotary main spindle which is rotatable with respect to the column, a working tool which is held by the rotary main spindle, and a phase detecting unit which detects a phase of the working tool with respect to the rotary main spindle. The working tool includes a cutter portion which has cutters, a holder portion, and a detected portion which is formed on the holder portion. The phase detecting unit includes a detecting section which detects the detected portion, and a calculating section which calculates a phase angle of the detected portion with respect to a reference position of the rotary main spindle, based on a result detected by the detecting section.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: April 26, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Seiichi Ohno, Minoru Sato, Takuya Nakayama, Tetsuro Furuhata
  • Patent number: 11309643
    Abstract: A substrate connecting structure includes a first substrate, a second substrate facing the first substrate, and a terminal through which electricity is supplied to the first substrate and the second substrate. The terminal has a first substrate connecting part that is connected to the first substrate from a side opposite from the second substrate, and a second substrate connecting part that is provided by splitting from the first substrate connecting part at an intermediate point in the terminal and connected to the second substrate by extending contactlessly through the first substrate from the side opposite from the second substrate toward the second substrate.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: April 19, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Masato Oda, Yuto Sato
  • Publication number: 20220112807
    Abstract: A vane pump includes a cam ring, a rotor, a plurality of vane, and a lateral plate. The lateral plate has an extension groove. The shape of a pump chamber forming surface viewed from the rotation-axis direction of the rotor satisfies the following requirements i) and ii) at the time when a first vane passes the base end part of the extension groove: i) the center line of the groove width of the extension groove is inclined from the radial direction of the rotor; and ii) a slit in which a second vane is accommodated has an open end falling within a belt-shaped range obtained by extending a groove width of the base end part of the extension groove along a virtual extension line.
    Type: Application
    Filed: October 1, 2021
    Publication date: April 14, 2022
    Applicant: JTEKT CORPORATION
    Inventor: Yuji TAKAHASHI
  • Patent number: 11299198
    Abstract: A method estimates a track rod force which is exerted, in a power steering system with which a vehicle is equipped, on a track rod belonging to a steering mechanism which connects an actuator to a steered wheel which is orientable in the yaw direction and which bears a tyre of which the tread is in contact with the ground, the value of the estimated track rod force being corrected as a function of the longitudinal speed of the vehicle by a force component that models the release of the elastic torsion of the tyre so as to reduce, the estimated track rod force according to the longitudinal speed of the vehicle, when the vehicle transitions from a park situation in which the longitudinal speed of the vehicle is zero to a drive situation in which the longitudinal speed of the vehicle is non-zero.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 12, 2022
    Assignee: JTEKT EUROPE
    Inventors: Sébastien Bourdrez, Pierre Dupraz, Serge Gaudin, Pascal Moulaire, Kazusa Yamamoto
  • Patent number: 11300949
    Abstract: To provide a data processing device of production equipment that can generate data usable by an operator or an administrator by performing processing for a collected plurality of types of data. A data processing device includes a reference-data acquiring unit configured to acquire, in production equipment, reference data including information concerning time in which a reference for grouping of data operates, a target-data acquiring unit configured to acquire target data concerning a state of the production equipment detected by detectors provided in the production equipment, and a combined-data generating unit configured to generate, for each group of the reference data, combined data for each group obtained by combining, with the reference data, data detected in the same period of time as an operation period of time of the reference data in the target data.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: April 12, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Tomohisa Kato, Akio Uchino, Toshihiko Yotsui, Yuki Ishigure, Asami Hara, Tatiana Kundozerova, Tatsuo Oshiumi
  • Patent number: 11299197
    Abstract: A steering system includes an electric motor, a detector, and a controller of a vehicle. The controller is configured to control the electric motor by switching an autonomous steering mode, a manual steering mode, and a cooperative steering mode. The controller is configured to control the electric motor in the cooperative steering mode unconditionally or when a predetermined condition is satisfied in a case where a situation to switch a steering mode to the manual steering mode during control in the autonomous steering mode is predicted and a manual steering request is transmitted at a time point that is prior, by a first predetermined time, to occurrence of the situation, or is transmitted when the vehicle arrives at a point that is located a first predetermined distance before a point where the situation is to occur.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: April 12, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Naoki Shoji, Robert Fuchs, Mitsuko Yoshida
  • Patent number: D949482
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: April 19, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yoshinobu Katoh, Hiromichi Ohta, Kazuyoshi Ohtsubo, Yuki Kobayashi, Shintaro Yoshida, Katsuhide Kikuchi, Mikio Shinohara
  • Patent number: D950076
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: April 26, 2022
    Assignee: JTEKT CORPORATION
    Inventors: Yoshinobu Katoh, Hiromichi Ohta, Kazuyoshi Ohtsubo, Yuki Kobayashi, Shintaro Yoshida, Katsuhide Kikuchi, Mikio Shinohara