Patents Assigned to JTEKT
  • CONVEYING DEVICE
    Publication number: 20180073781
    Abstract: In a conveying device, a belt conveyer is equipped with a conveying portion that conveys an object from an upstream region to a downstream region. A heat source heats the conveyed object. A cooling portion is located downstream of a terminal end of the belt conveyor and cools the object. A first thermoacoustic cooling device cools the cooling portion. A first prime mover generates acoustic waves from heat transmitted from the first heat source. A first receiver generates, from the acoustic waves, cooling heat corresponding to a cooling temperature that is lower than a temperature of the heat source.
    Type: Application
    Filed: September 15, 2017
    Publication date: March 15, 2018
    Applicants: JTEKT CORPORATION, Koyo Thermo Systems Co., Ltd.
    Inventors: Toshiyuki SAITO, Ryouichi TAKAHATA, Tomoyuki TAKEI, Masashi HATTORI
  • ELECTRONIC CONTROL DEVICE
    Publication number: 20180077825
    Abstract: An electronic control device includes a heating element, a circuit substrate, a heat radiation plate, and a heat radiation material. Connection terminals of the heating element are fixed to wiring patterns on a circuit principal surface of the circuit substrate with solder. Through holes are provided in the circuit substrate at portions spaced away from the distal ends of the connection terminals of the heating element by a distance equal to or smaller than a thickness of the circuit substrate. The heat radiation material applied between a circuit principal surface of the circuit substrate and the heat radiation plate is exposed to the circuit principal surface via the through holes. The heat radiation material exposed to the circuit principal surface covers the distal ends of the connection terminals fixed with the solder.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 15, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Yoshihiro KOJIMA
  • TRAINING ASSISTANCE APPARATUS
    Publication number: 20180075780
    Abstract: A training assistance apparatus includes an actual operation time acquiring unit configured to acquire an actual operation time of an operation that is executed by an operator on a processing machine, a standard time storing unit configured to store a standard time of the operation, and a display unit configured to display the actual operation time and the standard time for comparison.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 15, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Toshiyuki Tsuzuki, Toshio Aono
  • USE OF A STEPPED SHRINK-FIT RING TO ASSEMBLE A STEERING ASSIST MOTOR IN A STEERING CASE
    Publication number: 20180072342
    Abstract: An assembly method in which an assembly ring is force-fitted between a first part and a second part such as to create: a tightening contact between the first part and the inner face of the ring, by means of plastic deformation of the ring, said tightening contact occupying a first interference zone; and a tightening contact between the second part and the outer face of the ring, said tightening contact occupying a second interference zone. The assembly ring comprises a first ring segment (T1) and a second ring segment (T2) which are stepped axially in relation to one another and which have different radial dimensions from one another, such as to confine the first interference zone to the first ring segment (T1) and the second interference zone to the second ring segment (T2), in order to prevent the first interference zone and the second interference zone from overlapping axially.
    Type: Application
    Filed: April 6, 2016
    Publication date: March 15, 2018
    Applicant: JTEKT EUROPE
    Inventors: Patrice BROCHOT, Julien STEPHANUS
  • Electric power steering system
    Patent number: 9914473
    Abstract: Provided is an electric power steering system that achieves a more appropriate steering feel. An ECU of the electric power steering system calculates a basic assist component and a target pinion angle based on at least steering torque. The ECU calculates a correction component for the basic assist component through feedback control in which an actual pinion angle is caused to match the target pinion angle. The ECU calculates an assist command value by adding the correction component to the basic assist component. The ECU corrects a hysteresis controlled variable and a viscosity component according to the rate of change (gradient) in a spring component with respect to a change in absolute value of the target pinion angle. Specifically, the ECU multiplies the hysteresis controlled variable and the viscosity component by gains that have a larger value as the rate of change in spring component increases.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: March 13, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Terutaka Tamaizumi, Hirozumi Eki, Masayuki Kita
  • Vehicular control apparatus
    Patent number: 9914474
    Abstract: A vehicular control apparatus that functions more reliably is provided. A quasi-abnormality control circuit brings one of a clock signal, an internal watchdog signal, and an answer signal into a quasi-abnormal state when an ignition is switched on. A clock determining circuit, an internal watchdog signal determining circuit, and a Q&A watchdog circuit output determination signals, respectively. One of the determination signals corresponds to a monitoring target signal brought into the quasi-abnormal state and indicates an abnormality. A reset signal determining circuit receives the determination signals, and generates a reset signal in accordance with determination results in the determination signals. A quasi-abnormality control circuit switches the monitoring target signal to be brought into the quasi-abnormal state each time the ignition is switched on.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: March 13, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Kenichi Kozuka
  • Vehicle steering system
    Patent number: 9914476
    Abstract: A vehicle steering system includes a higher-level ECU and a lower-level ECU. The lower-level ECU includes a steered angle limit setter, and steered angle limiters. The steered angle limit setter sets an allowable upper limit to a target inner and outer wheel steered angle difference responsive to the absolute value of a target outer steered angle. The steered angle limit setter calculates a limit to the absolute value of a target inner steered angle. The steered angle limit setter subsequently sets this limit for one of the steered angle limiters that is fed the target inner steered angle in the present calculation cycle. The limiter, which is fed the target inner steered angle, limits the absolute value of the target inner steered angle so that the absolute value of the target inner steered angle is equal to or below the limit, and outputs the resulting value.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: March 13, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Toshiaki Oya
  • Sliding constant-velocity joint
    Patent number: 9915293
    Abstract: A constant-velocity joint 1 includes an outer ring with three raceway grooves formed therein, a tripod member having three tripod shaft portions, and roller units each having a cylindrical inner roller externally fitted over the corresponding tripod shaft portion and an outer roller. The outer roller has an annular surface facing a ceiling surface of a raceway groove. The ceiling surface includes first and second contact portions and that come into contact with an outer edge of the annular surface when the roller unit is tilted. When an outside diameter of the annular surface is represented as a roller end surface diameter A, a width of the outer roller in an axial direction is represented as a roller width B, and an interval between the first and second contact portions is represented as a contact portion interval H, a relational expression (A+B)/H?2.5 is satisfied.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: March 13, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Keishi Kobata
  • Hub Unit
    Publication number: 20180066699
    Abstract: A hub unit includes an outer ring, an inner shaft, rolling elements and a sealing device. The outer ring includes an outer ring body and an outer ring flange. The inner shaft includes an inner shaft body and an inner shaft flange. The outer ring body includes a first portion and a second portion. The first portion is an end part on the outer side of the outer ring body. The second portion is a part of the outer ring body between the first portion and the outer ring flange. The second portion includes an upper build-up portion. The upper build-up portion is formed in an upper part of the second portion and a thickness of the build-up portion is larger than thicknesses of side parts of the second portion. An upper end of the upper build-up portion is higher than an upper end of the first portion.
    Type: Application
    Filed: August 25, 2017
    Publication date: March 8, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Yuya INOUE, Takaaki ONIZUKA, Toshihiro HAKATA, Teruyuki WAKISAKA, Takuya TODA
  • Rolling bearing device
    Patent number: 9909622
    Abstract: A rolling bearing device includes: a bearing part having an inner ring, an outer ring, and balls; and an oil supply unit provided adjacent to an annular space between the inner ring and the outer ring and capable of supplying lubricating oil to the annular space. The bearing part has an annular cage provided in the annular space. The cage has a pair of annular parts and a plurality of bars. An outer circumferential surface of the annular part located on a first axial side has a contact portion capable of coming in contact with a part of an inner circumferential surface of the outer ring. A radially outer surface of the cage has, with the contact portion being a top, a first inclined surface provided from the top toward the first axial side and a second inclined surface provided from the top toward a second axial side.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: March 6, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Kiyoshi Tanimoto
  • Grinding wheel manufacturing method and grinding wheel
    Patent number: 9908216
    Abstract: A method of manufacturing a grinding wheel, and a grinding wheel. After a first overcoat layer is formed on each of CBN abrasive grains, a second overcoat layer that is plastically deformed under a pressure lower than a pressure under which the first overcoat layer is deformed, is formed on the outer side of the first overcoat layer to manufacture coated abrasive grains. The coated abrasive grains are subjected to pressure-molding to be formed into a prescribed shape under a pressure that is equal to or higher than a pressure under which the second overcoat layer is plastically deformed. The second overcoat layers are deformed and flow to form a molded material having a structure in which the first overcoat layers contact each other, and the flowing second overcoat layers are moved into clearances between the coated abrasive grains.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: March 6, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Shinji Soma, Naoto Ono, Tomoyuki Kasuga, Ryo Ito
  • STEERING CONTROL DEVICE
    Publication number: 20180057043
    Abstract: A steering control device includes a feedback processing portion configured to control a current flowing through a motor to a current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to limit a magnitude of the current command value to a magnitude of a limited current value or smaller, when the end determination processing portion determines that the turning angle has reached the limit angle. The limited current value is a value obtained by performing correction to decrease a magnitude of a detected value of the current flowing through the motor at a time when the end determination processing portion determines that the turning angle has reached the limit angle, based on a degree of a decrease in a magnitude of a rotational speed of the motor.
    Type: Application
    Filed: August 11, 2017
    Publication date: March 1, 2018
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro TOKO, Hiromasa TAMAKI, Jun HASEGAWA, Shohei FUJITA, Kohei YANAI, Tatsuya SUZUKI
  • Vehicle Controller
    Publication number: 20180057009
    Abstract: An ECU includes a deviation calculating circuit an assist control circuit, an automatic steering control circuit including an intervention determination switching circuit, an adder, a current command value calculating circuit The intervention determination switching circuit includes a count amount calculating circuit, an adder, an immediately-preceding count amount output circuit, a switching determination circuit, and an output switching circuit. The count amount calculating circuit calculates a count amount having a positive value or a negative value based on a steering torque absolute value calculated by an absolute value switching circuit. The adder calculates a total count amount that is the total sum of a presently calculated count amount and an immediately-preceding count amount calculated in an immediately-preceding calculation cycle.
    Type: Application
    Filed: August 3, 2017
    Publication date: March 1, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Shingo MAEDA, Terutaka TAMAIZUMI, Jun HASEGAWA, Masayuki KITA, Gempei NAKASONE, Hiromasa TAMAKI
  • STEERING CONTROL DEVICE
    Publication number: 20180057047
    Abstract: A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor so as to control a current flowing through the motor to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor when the end determination processing portion determines that the turning angle has reached the limit angle.
    Type: Application
    Filed: August 11, 2017
    Publication date: March 1, 2018
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Takahiro TOKO, Hiromasa TAMAKI, Jun HASEGAWA, Shohei FUJITA, Kohei YANAI, Tatsuya SUZUKI, Tatsuya MIYAKE, Takashi SUZUKI
  • Solenoid valve and manufacturing method of the same
    Patent number: 9903498
    Abstract: A solenoid valve has a coil spring that biases a spool valve toward a solenoid portion, and an adjuster screw that is positioned to interpose the coil spring between the adjuster screw and the spool valve and that is screwed in an internally threaded portion of a sleeve so that its axial position is adjusted. The sleeve is swaged with a swaging tool etc. from an outer peripheral surface located on the outer peripheral side of the internally threaded portion of the sleeve, whereby the swaged part of the internally threaded portion is plastically deformed to the opposite side from the coil spring. The adjuster screw is thus fixed.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: February 27, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Koichi Takanishi, Toshio Murakami, Kaori Fujita, Itsuki Ono
  • Worm reduction gear and steering mechanism
    Patent number: 9902421
    Abstract: In a worm reduction gear, a second bearing that supports a second end of a worm shaft and a guide member are housed in a holding hole in a housing. A bias member biases the second end of the worm shaft toward the worm wheel (in a second direction). The guide member is elastically fitted in the holding hole in the housing to guide movement of the second end via the second bearing. A slit is fanned in the guide member. Stress is relieved which is exerted on the guide member when the guide member is elastically fitted in the holding hole.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: February 27, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Naofumi Kawamura
  • Tapered roller bearing
    Patent number: 9903412
    Abstract: A tapered roller bearing includes: an inner ring including an inner raceway surface tapered so that the inner raceway surface increases in diameter from a first side to a second side; an outer ring including an outer raceway surface tapered so that the outer raceway surface increases in diameter from the first side to the second side; a plurality of tapered rollers disposed in an annular space defined between the inner ring and the outer ring; and an annular cage retaining the tapered rollers. The cage includes: a small diameter annular portion; a large diameter annular portion; and a plurality of cage bars connecting the small and large diameter annular portions. An outer clearance is defined between the outer ring and the cage and between circumferentially adjacent ones of the tapered rollers. The outer clearance has a cross-sectional area increasing from the second side to the first side.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: February 27, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Akiyuki Suzuki
  • Vehicular differential apparatus
    Patent number: 9897186
    Abstract: A vehicular differential apparatus includes: a differential case; a first output portion in which a first coupling member and a first side gear mesh with each other via helical teeth; a second output portion in which a second coupling member and a second side gear mesh with each other via helical teeth; and a center washer 30 disposed between the first and second output portions. A clearance through which the first coupling member is movable in an axial direction between the center washer and the first sidewall portion is different in axial width from that through which the first side gear is movable in that direction therebetween. A clearance through which the second coupling member is movable in the axial direction between the center washer and the second sidewall portion is different in axial width from that through which the second side gear is movable in that direction therebetween.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: February 20, 2018
    Assignee: JTEKT CORPORATION
    Inventor: He Jin
  • Differential gear
    Patent number: 9897187
    Abstract: A differential gear includes: a first output gear; a second output gear; a differential case; a clutch member configured to move in a direction of a rotation axis between a connecting position where the differential case is connected to the first output gear in a relatively non-rotatable manner and a non-connecting position where the differential case and the first side gear are allowed to rotate relative to each other; an electromagnetic coil having a cylindrical shape and configured to move the clutch member in the direction of the rotation axis; and a yoke having an annular shape and serving as a magnetic path of a magnetic flux of the electromagnetic coil. The clutch member has an outermost diameter smaller than an inside diameter of the yoke.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: February 20, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Minoru Onitake, Yasunori Kamitani, Motoyasu Yamamori
  • Display panel for a machine tool with graphical user interface
    Patent number: D812628
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: March 13, 2018
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yosuke Okado, Hiroyuki Takahara, Tatsuya Kimura