Patents Assigned to JTEKT
  • FOUR-WHEEL-DRIVE VEHICLE AND METHOD OF CONTROLLING FOUR-WHEEL-DRIVE VEHICLE
    Publication number: 20190061524
    Abstract: A four-wheel-drive vehicle includes: a pump that is actuated by an electric motor; a friction clutch that has a plurality of clutch plates that are pressed by a piston that is movable by working oil discharged from the pump; a control device that controls the electric motor; front wheels, to which a drive force of an engine is always transferred; and rear wheels, to which the drive force of the engine is transferred in accordance with the fastening force of the friction clutch. When it is determined that the vehicle is in a high fastening force-requiring state in which it is necessary for the friction clutch to transfer a large drive force temporarily, the control device causes the electric motor to output torque that is larger than torque that the electric motor can continuously output.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 28, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Tomohiro NOZU
  • BALL SCREW DEVICE, METHOD OF MANUFACTURING BALL SCREW DEVICE, AND STEERING SYSTEM INCLUDING BALL SCREW DEVICE
    Publication number: 20190061806
    Abstract: In a ball screw device, an inner peripheral rolling groove of a nut includes, between openings of mounting holes, a constant pitch circle diameter region where a pitch circle diameter is constant and gradually-changing pitch circle diameter regions where the pitch circle diameter gradually increases, in the ranges from opposite ends of the constant pitch circle diameter region to the respective openings. At least the constant pitch circle diameter region has a surface hardness greater than or equal to a predetermined value, among the constant pitch circle diameter region and the gradually-changing pitch circle diameter regions excluding edges at the boundaries between the respective openings and the inner peripheral rolling groove, and the edges at the boundaries between the respective openings and the inner peripheral rolling groove have a surface hardness less than the predetermined value.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 28, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Masashi YAMAGUCHI
  • Taper roller bearing
    Patent number: 10215233
    Abstract: A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one side in a axial direction, a large-diameter annular portion which is positioned on the other side in the axial direction and on a radial outer side of a large flange of the inner ring, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion. The taper roller bearing has a labyrinth structure which suppresses a flow of lubricating oil to the outside of the bearing from the inside of the bearing between the large flange and the large-diameter annular portion.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: February 26, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata, Yuki Shishihara
  • Electric storage device
    Patent number: 10217570
    Abstract: An electric storage device has an electrode body and a housing body. The electrode body has a plurality of positive plates and a plurality of negative plates. The positive plates and the negative plates are alternately stacked on each other via separators. The housing body houses the electrode body together with an ion conductor. The electric storage device is provided with a magnetic field generating unit that generates magnetic force lines in a certain direction.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: February 26, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Takashi Matsuura, Koji Nishi, Takumi Mio, Yukihiro Komatsubara
  • POWER SOURCE SYSTEM
    Publication number: 20190056771
    Abstract: A power source device includes a switching circuit configured to switch the power supply mode between a first power supply mode, in which power is supplied to a drive circuit for an electric motor by only a main power source, and a second power supply mode, in which power is supplied to the drive circuit utilizing both the main power source and an auxiliary power source. A control device includes: a determination unit that determines whether the operation state of the electric motor is a regeneration state or a power-running state; and a unit configured to limit power to be supplied to the drive circuit when the power supply mode is the second power supply mode and it is determined by the determination unit that the operation state of the electric motor is the regeneration state.
    Type: Application
    Filed: August 6, 2018
    Publication date: February 21, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Fumihiko SATO
  • SEAL MEMBER FOR ROLLING BEARING AND ROLLING BEARING ASSEMBLY
    Publication number: 20190055989
    Abstract: A rolling bearing has a pair of inner rings and an annular groove provided on an outer circumference of a portion where end portions of the pair of inner rings abut against each other. A seal member for a rolling bearing has an elastic portion. The seal member for a rolling bearing is mounted in the annular groove. The elastic portion has an annular proximal end portion that is fixed to one axial end side of the annular groove and an annular extending portion extending from the proximal end portion towards the other axial end side and having on an inner circumference thereof a sliding contact lip configured to be brought into sliding contact with the other axial end side of the annular groove.
    Type: Application
    Filed: February 2, 2017
    Publication date: February 21, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Kazuki HAMADA, Yuta SUGAYA, Yuka SATO
  • POWER STEERING SYSTEM
    Publication number: 20190054951
    Abstract: A power source device includes a switching circuit configured to switch the power supply mode between a first power supply mode, in which power is supplied to a drive circuit for an electric motor by only a main power source, and a second power supply mode, in which power is supplied to the drive circuit utilizing both the main power source and an auxiliary power source. A control device includes: a first control unit that controls the switching circuit on the basis of a value that matches power consumption by the drive circuit; and a second control unit that switches the power supply mode to a second power supply mode by controlling the switching circuit during sailing stop.
    Type: Application
    Filed: August 6, 2018
    Publication date: February 21, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Toyoki SUGIYAMA
  • Tapered roller bearing
    Patent number: 10208795
    Abstract: A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers provided in an annular space formed between the inner and outer rings and rolling on an inner raceway surface and an outer raceway surface, and an annular cage that holds the tapered rollers. The cage has a small annular portion positioned toward an axially first side with respect to the tapered rollers, a large annular portion positioned toward an axially second side with respect to the tapered rollers, and a plurality of cage bars that couples the small annular portion and the large annular portion together. A minute clearance is formed between the inner ring and the large annular portion and between the outer ring and the large annular portion, respectively.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: February 19, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Junji Murata, Shigeo Kamamoto, Yuki Shishihara
  • Work holder and work machining method
    Patent number: 10207332
    Abstract: A work holder includes: a first holding part having three attracting members that are arranged circumferentially apart from each other to attract an axial end face of an annular work; and a second holding part having a contacting member that is held in contact with an inner periphery or outer periphery of the work and restricts radial movement of the work.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: February 19, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Takashi Yokoyama, Masami Narisawa, Shogo Kuroyanagi, Yoshinobu Shichiri
  • Method for manufacturing hub ring and method for manufacturing vehicle bearing apparatus
    Patent number: 10207537
    Abstract: A method for manufacturing a vehicle bearing apparatus includes a method for manufacturing a hub ring. The hub ring includes a seal facing surface, a flange portion, and a shaft body portion. The flange portion includes a thin portion, a thick portion, bolt holes, a thin portion outer surface, a thick portion outer surface, and bolts. The flange portion protrudes outward from the shaft body portion. The thick portion is formed on an outer side with respect to the bolt holes in the flange portion, and the thin portion is formed on an inner side with respect to the thick portion in the flange portion. In the method for manufacturing the hub ring, machining is performed on the thick portion outer surface by using the seal facing surface subjected to grinding, as a reference surface, after the bolts are fitted into the flange portion.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: February 19, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Kenichi Morita, Yuu Katsuyama, Ryoichiro Kotani, Hiroyoshi Komatsu, Toru Sasaki
  • Bearing apparatus and method for feeding lubricant to bearing
    Patent number: 10208799
    Abstract: A bearing apparatus includes a lubrication unit and a sensor to sense the temperature of the lubricant in the lubrication unit. The lubrication unit has a pump having a storage portion in which the lubricant is stored and a piezoelectric body that is deformed by an applied voltage, the pump enabling the lubricant in the storage portion to be discharged into the annular space by reducing the volume of the storage portion in conjunction with the deformation of the piezoelectric body, the pump also enabling the lubricant to be sucked into the storage portion to refill the storage portion with the lubricant by increasing the volume of the storage portion, and a control unit that performs control by outputting a control signal allowing the speed of change in the volume of the storage portion to depend on the temperature of the lubricant.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: February 19, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Tsukasa Sakazaki, Yoshimichi Higashiyama, Masami Naka
  • Sealed thrust ball bearing
    Patent number: 10208800
    Abstract: The inner elastic sealing member 5 includes an inner cylindrical base portion 5A leading to an end portion of an inner cylindrical portion 1B of the inner ring 1, and also includes, at an outer circumferential surface of the inner cylindrical base portion 5A, a projection 7 extending radially outward of an inner periphery of a lower end of an inner cylindrical portion 2B of the outer ring 2. The outer elastic sealing member 6 includes a lip 6B brought into pressure contact with a pressure contact surface B of the outer ring 2. An upper surface 7A of the projection 7 is spaced downward from the lower end of the inner cylindrical portion 2B of the outer ring 2, and an outer circumferential surface 7C of the projection 7 is spaced radially inward from the lower member 8.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 19, 2019
    Assignees: JTEKT CORPORATION, NAKANISHI METAL WORKS CO., LTD.
    Inventors: Hiroshi Yano, Yoshio Horikawa
  • Semiconductor device
    Patent number: 10211135
    Abstract: A semiconductor device includes a semiconductor element, a circuit board, metal wires, and an expanding member. The circuit board has an upper surface and a lower surface opposite the upper surface. The metal wires are formed on at least one of the upper surface and the lower surface. At least two connection terminals are formed in a terminal formation surface of the semiconductor element which is disposed so as to face the upper surface of the circuit board. The expanding member is fixed to the terminal formation surface of the semiconductor element, has a larger coefficient of linear thermal expansion than the semiconductor element, and has a size larger than the interval between adjacent two of the at least two connection terminals.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: February 19, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Naoki Tani
  • BALL SCREW APPARATUS
    Publication number: 20190048982
    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: October 17, 2018
    Publication date: February 14, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Gento ARAMOTO, Naoko SAKAGUCHI
  • DATA PROCESSING DEVICE OF PRODUCTION EQUIPMENT
    Publication number: 20190049939
    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: Application
    Filed: August 7, 2018
    Publication date: February 14, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Tomohisa KATO, Akio Uchino, Toshihiko Yotsui, Yuki Ishigure, Asami Hara, Tatiana KUNDOZEROVA, Tatsuo Oshiumi
  • CYCLOIDAL REDUCER WITH BACKLASH SELF-ADJUSTMENT AND POWER STEERING SYSTEM WITH SUCH A REDUCER
    Publication number: 20190047610
    Abstract: A cycloidal gear pair reducer including an input shaft, mounted in a reducer casing such that it rotates about an axis referred to as “main axis”, an eccentric member carried by the input shaft and rotated by the latter, at least one cycloidal disc rotatably mounted on the eccentric member and having a cycloidal toothing, at least one ring gear provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and an output shaft; wherein the reducer comprises a suspension device arranged to return elastically the cycloidal toothing of the cycloidal disc and the receiving toothing of the ring gear towards one another such that the meshing backlash between the cycloidal disc and the ring gear is self-adjusted along at least one radial component relative to the main axis.
    Type: Application
    Filed: April 21, 2017
    Publication date: February 14, 2019
    Applicant: JTEKT EUROPE
    Inventor: Laurent REY
  • Rack guide device and steering apparatus including same
    Patent number: 10202142
    Abstract: A rack guide device includes a rack guide, a blocking member, a plate spring and a holding member. The rack guide is accommodated in an accommodating portion that is formed in a housing through which a rack shaft is inserted so as to move towards or away from the rack shaft and that supports the rack shaft so that the rack shaft slides in an axial direction thereof. The blocking member is fixed to an external opening end provided on an opposite side of the accommodating portion to a side thereof that faces the rack shaft. The disc spring is interposed between the blocking member and the rack guide to bias the rack guide towards the rack shaft. The holding member holds the disc spring and is directly or indirectly held to the rack guide or the blocking member through frictional engagement.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: February 12, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Makoto Taenaka, Hidetoshi Sumihara, Kazuhiro Watanabe, Yasuto Takaki, Tetsuji Miyano
  • Pin assembly and steering device
    Patent number: 10202140
    Abstract: A pin assembly includes: a resin pin; and a collar fitted to a round shaft portion of the resin pin and having higher hardness than the resin pin. The round shaft portion is sheared to cancel connection between a first plate and a second plate upon secondary collision of a vehicle. The collar includes an end face received by a reception surface of the second plate, and shears the round shaft portion in a shear plane along the end face upon the secondary collision. The round shaft portion includes a hollow hole. An inner circumference of the hollow hole includes a straight portion which has a generating line parallel to an axial direction of the round shaft portion and which is traversed by a plane including the end face of the collar.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: February 12, 2019
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DAIWA PLASTICS CO., LTD.
    Inventors: Eiji Tanaka, Susumu Imagaki, Hiroyuki Yao, Kenji Imamura, Kentaro Okuno, Eiji Hayashi
  • Amorphous hydrocarbon based film, and sliding member and sliding system with said film
    Patent number: 10202560
    Abstract: A low-friction coating includes: an aliphatic hydrocarbon group showing a peak in a region of 2,900 cm?1 to 3000 cm?1 in an infrared absorption spectrum; a carbonyl group showing a peak in a region of 1,650 cm?1 to 1,800 cm?1 in an infrared absorption spectrum; an aromatic component (C7H7+) showing a peak at mass 91.1 in a positive ion spectrum obtained by TOF-SIMS; and a condensed ring based component (C9H7+) showing a peak at mass 115.2 in the positive ion spectrum obtained by TOF-SIMS.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 12, 2019
    Assignees: JTEKT CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Takahisa Kato, Masataka Nosaka, Mamoru Tohyama, Atsushi Murase, Kyoko Nakai, Masahiro Suzuki
  • Electric power steering system
    Patent number: 10202145
    Abstract: In an electric power steering system, a low-pass filter executes a low-pass filtering process on a detected steering torque value detected by a torque sensor. A steering torque deviation computing unit computes a deviation ?T between a detected steering torque value T* obtained through the low-pass filtering process and the detected steering torque value detected by the torque sensor. A PI control unit generates a vibration compensation value used to lead the detected steering torque value to the steering torque value obtained through the low-pass filtering process, by executing PI computation on the steering torque deviation computed by the steering torque deviation computing unit.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: February 12, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Yuji Kariatsumari, Tatsuma Kouchi