Patents Assigned to JTEKT
  • Power transmission chain and power transmission device
    Patent number: 8485927
    Abstract: A power transmission chain includes a plurality of links respectively having front and rear insertion parts into which pins are inserted, a plurality of first pins and a plurality of second pins which are arranged in front and back for connecting the links. A plurality of the links includes two types of the links having different pitch lengths, wherein provided that a radius of a pulley shaft is RA, a radius of curvature of a face of the link having a shorter pitch length at an inner diameter side of the chain is RS, and a radius of curvature of a face of the link having a longer pitch length at an inner diameter side of the chain is RL, relation is set to be RA?RS?1.5RA, and RS<RL.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: July 16, 2013
    Assignee: JTEKT Corporation
    Inventors: Yoshihisa Miura, Teruko Nakazano
  • Steering device
    Patent number: 8485554
    Abstract: A steering device has a guide rail and a holding rubber. The guide rail is mounted on a mounting stay of a vehicle by way of an upper bracket, and the holding rubber restricts movement of the guide rail relative to the upper bracket. The guide rail has a fixed portion and a main body portion extending forward of the vehicle along the axial direction of a steering shaft from the fixed portion. The main body portion is inserted into a through hole of a vehicle body bracket. The holding rubber has a positioning protrusion and a detent pawl for restricting movement of the guide rail relative to the upper bracket before being fixed to the mounting stay so as to hold them at a mounting position. The detent pawl is formed so as to reduce a restricting force for restricting movement of the guide rail relative to the upper bracket as the guide rail comes closer to the mounting stay by screwing a nut onto a bolt.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: July 16, 2013
    Assignee: JTEKT Corporation
    Inventors: Akio Osuka, Ryota Okano
  • Roller bearing cage and roller bearing
    Patent number: 8485733
    Abstract: A cage is formed of a plurality of spacers that are arranged along a circumference of a same circle. Each spacer includes: first, second and third cage bars extending in substantially an axial direction of the circle and located at intervals from each other; a first coupling portion that couples an end portions of the first and second cage bars at one of the axial direction; and a second coupling portion that couples the other end portions of the second and third cage bars at the other one of the axial direction. The first cage bar, the second cage bar and the first coupling portion define a first pocket that is open at the other one of the axial direction side, and the second cage bar, the third cage bar and the second coupling portion define a second pocket that is open at the one of the axial direction side.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: July 16, 2013
    Assignee: JTEKT Corporation
    Inventor: Takeshi Miyachi
  • SPEED REDUCTION MECHANISM, AND MOTOR TORQUE TRANSMISSION DEVICE INCLUDING THE SAME
    Publication number: 20130178322
    Abstract: When an outer ring is fitted to an inner periphery of an input member, which defines a center hole, and an inner ring is fitted to an eccentric portion with clearances in a reduction-transmission mechanism, in a state where tooth tips of the input member contact bottomlands of a rotation force applying member on a line perpendicular to a second axis and a fourth axis, a size between the second axis and a third axis is set to a size that is smaller than or equal to half of a size obtained by adding a diameter difference between an outside diameter of a ball bearing and an inside diameter of the input member, which defines the center hole, a diameter difference between an inside diameter of the ball bearing and an outside diameter of the eccentric portion and an operating clearance of the ball bearing.
    Type: Application
    Filed: January 2, 2013
    Publication date: July 11, 2013
    Applicant: JTEKT Corporation
    Inventor: JTEKT Corporation
  • ELECTRIC POWER STEERING SYSTEM
    Publication number: 20130179040
    Abstract: In an electric power steering system, a control signal output section outputs independent dual-system control signals to driver circuits that are disposed in connection with independent dual-system motor coils. The control signal output section gives high priority to the output of the control signal to the other system, when the occurrence of energization failure is detected in one system. When the energization failure occurring phase is only one phase and the value of the basic command exceeds the upper limit of the priority command, the control signal output section outputs the control signal to the driver circuit in the system where the energization failure has occurred in order to supply electric power in which the two phases other than the energization failure occurring phase are used as the energized phases on the bases of the complementary command that corresponds to the excess of the upper limit.
    Type: Application
    Filed: September 6, 2011
    Publication date: July 11, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Hiroshi Suzuki
  • SPEED REDUCTION MECHANISM, AND MOTOR TORQUE TRANSMISSION DEVICE INCLUDING THE SAME
    Publication number: 20130178319
    Abstract: When a bearing includes outer and inner rings and the outer ring is fitted to the inner periphery of an input member, which defines a center hole, with a clearance and the inner ring is fitted to an eccentric portion with a clearance, a size between a second axis and a third axis is set to a size that is smaller than or equal to half of a size obtained by adding a diameter difference between an outside diameter of the bearing and an inside diameter of the input member, which defines the center hole, a diameter difference between an inside diameter of the bearing and an outside diameter of the eccentric portion and an operating clearance of the bearing in a state where the input member has been moved to contact the housing on a line perpendicular to the second axis and a fourth axis.
    Type: Application
    Filed: January 2, 2013
    Publication date: July 11, 2013
    Applicant: JTEKT Corporation
    Inventor: JTEKT Corporation
  • Resin cage for angular contact ball bearing
    Patent number: 8480305
    Abstract: A cage has a ring portion, and a plurality of column portions that protrude from the ring portion, that are arranged in the circumference direction. Each column portion has a column portion radially inward section that forms a bearing-radial-direction inward side portion, and a column portion radially outward section that is connected to the radially inward section at its radially outer end position, so as to protrude on both sides in the circumferential direction from the radially inward section. A connection position at which the radially outward section is connected to the radially inward section is adjusted to a position radially outward of a pitch circle position of the plurality of the balls that are held in the respective pockets. Thus, the thickness of the radially inward section at the connection position is larger than the thickness of the radially inward section at the pitch circle position.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: July 9, 2013
    Assignee: JTEKT Corporation
    Inventors: Masaki Maeda, Tsuyoshi Okumura, Hiroshi Yano
  • Tapered roller bearing, tapered roller bearing apparatus, and automotive pinion shaft supporting apparatus utilizing same tapered roller bearing apparatus
    Patent number: 8480308
    Abstract: A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers interposed between the outer ring and the inner ring, and a cage for the tapered rollers. Ra is smaller than Rb where Ra represents a radius of curvature of a large end face of the tapered roller and Rb represents a radius of curvature of an end face of a large rib portion of the inner ring.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: July 9, 2013
    Assignee: JTEKT Corporation
    Inventors: Naoki Masuda, Kazutoshi Toda, Hiroki Matsuyama, Kouji Kawaguchi, Hiroyuki Ohshima
  • ELECTRIC POWER STEERING APPARATUS
    Publication number: 20130173118
    Abstract: An ECU includes two drive circuits corresponding to the motor coils of two systems independent of each other, and a microcomputer that outputs control signals of two independent systems to the drive circuits. The microcomputer includes a first control signal output portion that outputs the control signal to the drive circuit of the first system by executing an electric current control so as to generate a motor torque that corresponds to the assist force. The microcomputer further includes a second control signal output portion that outputs the control signal to the drive circuit of the second system by executing a position control on the basis of a steering angle command value that is input from a superior ECU via an in-vehicle network so as to change the steering angle of the steering road wheels.
    Type: Application
    Filed: September 6, 2011
    Publication date: July 4, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Hiroshi Suzuki
  • ELECTRIC PUMP SYSTEM
    Publication number: 20130171008
    Abstract: In an electric pump system, hydraulic fluid that is stored in an oil pan is supplied to a transmission mechanism through an oil passage by driving an oil pump with the use of a motor. An EOPECU estimates a hydraulic pressure of the hydraulic fluid on the basis of a driving current for the motor and a rotation speed of the motor, and executes drive control on the motor on the basis of the estimated hydraulic pressure value.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 4, 2013
    Applicant: JTEKT Corporation
    Inventor: JTEKT Corporation
  • BALL TYPE CONSTANT VELOCITY JOINT
    Publication number: 20130172091
    Abstract: A constant velocity joint including an outer race including a plurality of outer race ball grooves on an internal surface thereof; an inner race arranged inside the outer race and including a plurality of inner race ball grooves on a peripheral surface thereof; a plurality of balls respectively received in the outer and inner race ball grooves for transmitting a torque between the outer race and the inner race; and a cage arranged between the outer and inner races and including a plurality of window portions that respectively receive balls in a circumferential direction thereof. On at least one of a plurality of groove wall protrusions that are configured by sidewall surfaces of the inner race ball grooves adjoining cutouts are respectively formed on axially opposite sides of an inner race on a peripheral side of the inner race.
    Type: Application
    Filed: July 4, 2011
    Publication date: July 4, 2013
    Applicant: JTEKT Corporation
    Inventors: Yuri Handa, Satoshi Suzuki
  • MOTOR CONTROL UNIT AND ELECTRIC PUMP UNIT
    Publication number: 20130171010
    Abstract: A control signal output unit obtains a motor control signal by applying a reduction amount for a current command value obtained by an over-power suppression control unit to a current command value from a host control unit. The over-power suppression control unit includes a hydraulic pressure estimation unit that estimates hydraulic pressure, and a current command value correction amount calculation unit that compares a target hydraulic pressure with an estimated hydraulic pressure and outputs the reduction amount for the current command value. Load information indicating whether a load on the pump is a low load or a high load that is higher than the low load is input into a control circuit from the host control unit, and the over-power suppression control unit changes the target hydraulic pressure in accordance with a magnitude of the load indicated by the load information.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 4, 2013
    Applicant: JTEKT Corporation
    Inventor: JTEKT Corporation
  • VEHICULAR POWER TRANSMITTING SYSTEM
    Publication number: 20130170953
    Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.
    Type: Application
    Filed: June 30, 2011
    Publication date: July 4, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., JTEKT Corporation, TOYOOKI KOGYO CO., LTD.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
  • Valve device and manually operated shutoff valve device
    Patent number: 8474792
    Abstract: In a valve device for selectively opening and closing a flow passage formed to open on a valve seat by a valve body through a resin-made seat, a hollow portion is formed on either one of the valve body and the valve seat and receives the resin-made seat therein, the resin-made seat has a thickness so that the resin-made seat partly protrudes from the hollow portion, and when the valve body is operated to close the flow passage, the resin-made seat is compressed to bring an end surface of the valve body into contact with the valve seat.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: July 2, 2013
    Assignee: JTEKT Corporation
    Inventors: Toshikatsu Kubo, Toshihiko Shima, Takuya Suzuki, Munetoshi Kuroyanagi
  • Swing internal contact type planetary gear device and rotation drive device
    Patent number: 8475315
    Abstract: An easily structured swing internal contact type planetary gear device is proposed which can achieve a higher meshing ratio when an involute tooth profile is adapted. Each of an internal tooth of an internally toothed gear wheel and an external tooth of an externally toothed gear wheel is formed with an involute tooth profile. Under a driving condition, one of an internal tooth body of the internally toothed gear wheel and an external tooth body of the externally toothed gear wheel is elastically deformed in an extending direction and the other thereof is elastically deformed in a contracting direction so that the number of meshing teeth becomes larger than the number of meshing teeth under a non-driving condition.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: July 2, 2013
    Assignee: JTEKT Corporation
    Inventors: Tsune Kobayashi, Motoyasu Yamamori, Atsushi Ando, Katsuhito Yoshinaga, Hideki Shibata, Akira Saito, Tohru Onozaki, Naomasa Mukaide, Tomohiko Haruyama
  • Inner ring and outer ring, and ball bearing
    Patent number: 8475053
    Abstract: A first fit portion and a second fit portion of an inner ring according to the invention have a spring property. Therefore, the first and second fit portions may be flexed radially outward by elasticity thereof and then fitted to a shaft. Thus, the inner ring is tightly fitted to the shaft with a set interference with respect to the shaft. Accordingly, it is easy to fit/remove the inner ring to/from the shaft. Therefore, an outer peripheral face of the shaft is pushed radially inward by elasticity of the first and second fit portions, that is, the inner ring is tightly fitted to the shaft, without reducing the ease of fitting/removing the inner ring to/from the shaft. As a result, it is possible to minimize generation of creep.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: July 2, 2013
    Assignee: JTEKT Corporation
    Inventor: Toshihiko Shiraki
  • STEERING SYSTEM
    Publication number: 20130161118
    Abstract: A steering system includes: an operation mechanism that includes an operation member; and a steered mechanism that is not mechanically coupled to the operation mechanism and that steers a wheel on the basis of a steering operation of the operation member. The operation mechanism includes a steering angle sensor that detects a steering angle of the operation member and a steering direction detection unit that detects a steering direction of the operation member. The steering direction detection unit includes a threaded shaft that is rotatable in the steering direction of the operation member, a nut that is screwed to the threaded shaft, a nut guide that causes the nut to move in an axial direction of the threaded shaft in accordance with rotation of the threaded shaft, and a force detection sensor that detects a force that the nut guide receives from the nut.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 27, 2013
    Applicant: JTEKT CORPORATION
    Inventor: JTEKT CORPORATION
  • HYDRAULIC POWER STEERING SYSTEM
    Publication number: 20130161113
    Abstract: When an ECU is powered on, an overall control unit determines whether a temperature detected by a temperature sensor is lower than or equal to a predetermined temperature. When it is determined that the detected temperature is lower than or equal to the predetermined temperature, the overall control unit provides a second operation start command for operating a valve driving motor control unit in a rotation direction alternately switching mode, to the valve driving motor control unit. When the valve driving motor control unit receives the second operation start command from the overall control unit, the valve driving motor control unit starts operating in the rotation direction alternately switching mode.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 27, 2013
    Applicant: JTEKT CORPORATION
    Inventor: JTEKT CORPORATION
  • STEERING SYSTEM
    Publication number: 20130161117
    Abstract: A steering system includes: an operation mechanism that includes an operation member used to perform a steering operation; and a steered mechanism that is not mechanically coupled to the operation mechanism, and that steers a wheel based on the steering operation of the operation member. The operation mechanism includes a steering angle sensor that detects a steering angle of the operation member, and steering direction detection unit that detects only a steering direction of the operation member.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 27, 2013
    Applicant: JTEKT CORPORATION
    Inventor: JTEKT CORPORATION
  • STEERING APPARATUS
    Publication number: 20130160597
    Abstract: A steering apparatus includes: a tilt angle adjustment mechanism; a telescopic mechanism; and a drive mechanism. The drive mechanism includes: a rotating member that is rotated by a motor; a transmission member that is coupled to the tilt angle adjustment mechanism; and a selector mechanism that changes a position of the rotating member. The rotating member has a protrusion that protrudes toward the transmission member, and the transmission member has a recess into which the protrusion is inserted. The selector mechanism inserts the protrusion into the recess by moving the rotating member to a coupling position, and removes the protrusion from the recess by moving the rotating member to a non-coupling position.
    Type: Application
    Filed: December 21, 2012
    Publication date: June 27, 2013
    Applicant: JTEKT CORPORATION
    Inventor: JTEKT Corporation