Patents Assigned to JTEKT
  • Patent number: 8678966
    Abstract: A chain which is wound round on a pair of pulleys so as to extend therebetween includes a plurality of links and a plurality of connecting members. A first pin and a second pin of the connecting member are brought into rolling and sliding contact with each other at a contact portion which is displaced in association with a change in a flexing angle between the links. End faces of the first pin each have a projecting curved portion where a contact area is formed when the end faces are brought into contact with sheave surfaces of the pulleys. With respect to a vertical direction, a projecting center of the projecting curved portion is disposed between a position of a first contact portion when the chain bites into the drive pulley and a position of a second contact portion when the chain bites into the driven pulley.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: March 25, 2014
    Assignee: JTEKT Corporation
    Inventors: Shigeo Kamamoto, Kozue Matsumoto
  • Patent number: 8678128
    Abstract: A vehicle steering system includes a rotation restriction mechanism that restricts a rotation amount of a steering member within a predetermined angle. The rotation restriction mechanism includes at least one plate element that is interposed between a rotatable element, which is coaxially rotatable together with a rotary shaft of the steering member, and a non-rotatable element, and that is rotatable relative to the rotary shaft. Light projecting units are provided at one of the rotatable element and the non-rotatable element, and light receiving units are provided at the other one of the rotatable element and the non-rotatable element. The at least one plate element has light transmission portions that allows transmission of light that is emitted from the light projecting units and that enters the light receiving units when a rotation angle of the at least one plate element is a predetermined angle.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: March 25, 2014
    Assignee: JTEKT Corporation
    Inventor: Atsushi Ishihara
  • Publication number: 20140079348
    Abstract: A rolling bearing includes an inner ring, an outer ring, and a plurality of rolling elements. A large number of inside dimples in which a liquid lubricant is retained and a large number of outside dimples in which a solid lubricant is retained are formed in at least one of an inner ring raceway surface and an outer ring raceway surface. The inside dimples are formed in a contact region at which the raceway surface contact the rolling elements or in a section of each non-contact region, the section being close to the contact region. The outside dimples are formed outside a portion in which the inside dimples are formed.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Masahiro SUZUKI, Junji MURATA, Kazuyoshi YAMAKAWA, Toshiyuki SAITO
  • Publication number: 20140077473
    Abstract: A first side-face spline of a hub spindle and a second side-face spline of a constant velocity joint each has a tooth tip formed by tip tilted surfaces tilted from tooth flanks constituting a tooth chevron, an internal angle of the tooth tip is set to be less than 180 degrees, and a tooth tip-side perpendicular distance, which is a perpendicular distance between a tooth tip virtual intersection and a first virtual plane is set larger than a bottom land-side perpendicular distance, which is a perpendicular distance between a bottom land virtual intersection and a second virtual plane.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Katsuyuki HARADA
  • Publication number: 20140079349
    Abstract: A bearing includes an inner ring, an outer ring, and a plurality of rolling elements. In the bearing, each of an inner ring raceway surface and an outer ring raceway surface has a contact area that comes into contact with the rolling elements, and a non-contact area that is formed adjacent to an outer side of an end portion of the contact area and does not come into contact with the rolling elements. A lubricant retaining portion having a recessed portion and a large number of non-uniform projections and depressions is formed at the non-contact area of at least one of the inner ring raceway surface and the outer ring raceway surface.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Junji MURATA
  • Publication number: 20140080614
    Abstract: A rotation transmitting apparatus includes a first shaft on which multiple external teeth are formed so as to be arranged in a circumferential direction, and a second shaft in which multiple internal teeth are formed so as to be arranged in the circumferential direction, the second shaft being fitted to the first shaft so as to be slidable relative to the first shaft in the axial direction and so as to be engageable with the first shaft in a rotational direction through the use of the external teeth and the internal teeth. A protrusion is formed on the tooth flank of one of the external tooth and the internal tooth, the protrusion being projected toward the corresponding tooth flank of the other of the external tooth and the internal tooth. The protrusion is made of a resin that is more elastically deformable than the tooth flank.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Koichi NABESHIMA, Eiji KANEUCHI, Yoshimasa YAMADA, Ryousuke IMAI
  • Publication number: 20140077638
    Abstract: A control device of a motor unit has a gear housing having a supporting wall portion, a ceramic portion formed on the supporting wall portion, a circuit board body fixed to the ceramic portion, a power element located inside the circuit board body, and a load receiving member that is located around the power element inside the circuit board body and receives a load applied to the circuit board body.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Motoo NAKAI, Yasuyuki WAKITA
  • Publication number: 20140081524
    Abstract: A target pinion angle computation unit computes a target pinion angle on the basis of a basic assist component and a steering torque, and computes the target pinion angle so as to rapidly increase a steering reaction force when it is determined based on the target pinion angle that a rack shaft of a rack-and-pinion mechanism reaches a position near a limit of a movable range of the rack shaft. In an. EPS, a correction component for the basic assist component, which is necessary to increase the steering reaction force rapidly, is computed through execution of PID control for causing an actual pinion angle to coincide with the target pinion angle. Because the correction component is added to the basic assist component, the steering reaction force is increased rapidly when the rack shaft reaches the position near the limit of the movable range.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Terutaka TAMAIZUMI, Hirozumi EKI, Masayuki KITA, Isao NAMIKAWA
  • Publication number: 20140081525
    Abstract: When only one of sensor signals generated by the plural systems and output from a torque sensor is normal, a control variable restriction processing part performs an assist restricting process for setting an upper limit value and a lower limit value of a basic assist control variable in accordance with at least one of the lateral acceleration, the steering angle, the steering speed, or the yaw rate.
    Type: Application
    Filed: June 12, 2012
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Hidenori Itamoto, Hirozumi Eki, Gempei Nakasone
  • Publication number: 20140079572
    Abstract: A bearing device includes: an outer ring housing in a cylindrical shape which is provided in a casing and has a discharge hole in an axially central portion of the outer ring housing and a notch groove passing through an axial end surface of the outer ring housing in the radial direction; and a rolling bearing mounted on each of both axial sides of the outer ring housing and rotatably supporting a rotational shaft positioned radially inside of the outer ring housing.
    Type: Application
    Filed: September 19, 2013
    Publication date: March 20, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Takashi IWATA, Chiaki SAITO, Yoshitaka WASEDA
  • Patent number: 8673409
    Abstract: A formation method of a coating that coats a coated body with the coating includes: generating cylindrical plasma in a vacuum deposition chamber as well as supplying material gas into the vacuum deposition chamber; applying pulse voltage to the coated body; and attaching a shield member that shields an uncoated member to an uncoated part where the coating of the coated body is not formed with separation spacing over a coated part where the coating is to be formed for preventing decrease of hardness of the coating in the coated part.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: March 18, 2014
    Assignees: JTEKT Corporation, CNK Co., Ltd.
    Inventors: Junji Ando, Tomoo Suzuki, Tomoki Ogawa, Masahiro Suzuki, Kazuyoshi Yamakawa, Toshiya Kubo, Hiroyuki Hashitomi, Daigo Yamamoto
  • Patent number: 8672553
    Abstract: A load detecting device for a roller bearing includes: a strain gauge that is provided in a roller arranged rollably between a first bearing ring and a second bearing ring and that detects a load applied to the roller; a position detecting sensor that detects a rotation position of the roller in a revolution direction of the roller; and a data logger that is provided for the roller and that records and stores a detection signal from the stain gauge.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: March 18, 2014
    Assignee: JTEKT Corporation
    Inventors: Shinya Matsuda, Takeshi Teramoto
  • Patent number: 8672084
    Abstract: A rear wheel steering system includes a rear rack shaft that slides in a vehicle-width direction to steer a pair of rear wheels, a recess formed in the rear rack shaft, and a pin member that is fitted into the recess from the outer side of the rear rack shaft, and is retracted to be disengaged from the recess. The pin member is fitted into the recess to lock sliding of the rear rack shaft in a neutral position, and the pin member placed in a retracted state is disengaged from the recess to cancel slide lock on the rear rack shaft. The rear rack shaft has guide grooves formed on respective sides of the recess in a longitudinal direction of the rear rack shaft so as to be contiguous with the recess, and used to guide the pin member, placed in the advanced state, toward the recess.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: March 18, 2014
    Assignee: JTEKT Corporation
    Inventor: Takeshi Watanabe
  • Patent number: 8668226
    Abstract: A steering apparatus includes a wire fitting bracket that is fitted to an end portion of a connecting wire for connecting an outer tube to an inner tube and that has a bracket body and a plurality of protrusions. The bracket body is fitted to a steering column-side member with a bolt, and has a bolt insertion hole through which the bolt is passed. The protrusions protrude from the bracket body, and are arranged around an axis of the bolt insertion hole. The protrusions are formed of rotation restricting protrusions that restrict rotation of the wire fitting bracket and an erroneous fitting prevention protrusion that prevents erroneous fitting of the wire fitting bracket.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: March 11, 2014
    Assignee: Jtekt Corporation
    Inventors: Kei Hirose, Yoshiaki Takagi
  • Patent number: 8668060
    Abstract: An electromagnetic absorber (10) for a vehicle including (a) a threaded rod (78) which is disposed on one of a sprung portion and an unsprung portion and which has a threaded groove (76) formed in its outer circumferential portion and an axial groove (90) extending in its axis direction (b) a nut (80) which is rotatably disposed on the other of the sprung portion and the unsprung portion and which is screwed with the threaded rod and (c) a rod-rotation inhibiting member (82) which includes a fitting portion configured to be fitted in the axial groove and which is disposed on the other of the sprung portion and the unsprung portion, the rod-rotation inhibiting member being configured to inhibit the threaded rod from rotating while permitting the threaded rod to move in the axis direction.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: March 11, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kayaba Industry Co., Ltd., JTEKT Corporation
    Inventors: Satoshi Kondo, Takuhiro Kondo, Yoshifumi Shige, Katsura Koyagi, Hajime Watanabe
  • Publication number: 20140066243
    Abstract: A chain, wound to span between two pulleys each having facing conical surfaces able to change a distance therebetween and sandwiched by the facing conical surfaces, includes: link units each configured such that plate-shaped links, each having openings, are oriented in a chain circumferential direction and arranged in a chain width direction; and pins each extending through the openings of the links of the link units adjacent in the chain circumferential direction and each contacting the conical surfaces of sheaves at both ends thereof. A curvature radius of a shape curve representing a shape of each end face of each pin in a plane perpendicular to the chain circumferential direction is larger at an inner side in a pulley radial direction than at an initial contact point that is a contact point at the time when a load on each pin is 0.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 6, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Teruhiko NAKAZAWA, Ichiro TARUTANI, Haruhiro HATTORI, Yuji NAGASAWA, Shinji YAMANE, Keisuke MORI
  • Publication number: 20140059832
    Abstract: In a method of manufacturing an intermediate shaft including: an internal shaft having an external spline; a tubular external shaft having on an inner circumference thereof an internal spline; and a resin coating provided on the external spline, a central axis line of an internal shaft manufacturing intermediate product and a central axis line of an external shaft manufacturing intermediate product are aligned with each other, and the internal shaft manufacturing intermediate product and the external shaft manufacturing intermediate product are held in such a way that the central axis lines thereof can be adjusted, in a heating adaptation step. In this state, the internal shaft manufacturing intermediate product and the external shaft manufacturing intermediate product slide relatively in an axial direction. In the heating adaptation step, a grease is interposed between the internal shaft manufacturing intermediate product and the external shaft manufacturing intermediate product.
    Type: Application
    Filed: March 16, 2012
    Publication date: March 6, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Ryoichi Tokioka
  • Publication number: 20140066252
    Abstract: A driving force transmission apparatus includes a linkage mechanism that is able to carry out switchover between a connected state where first and second intermediate shafts are connected to each other so as to be non-rotatable relative to each other to transmit torque output from an electric motor to a rear wheel, and a disconnected state where the first and second intermediate shafts are disconnected from each other. When switching the driving force transmission apparatus from the connected state to the disconnected state, a control unit reduces the torque that is generated by the motor during a drive state where the torque output from the motor is transmitted from the first intermediate shaft to the second intermediate shaft, and switches the driving force transmission apparatus from the connected state to the disconnected state by controlling the linkage mechanism while the torque that is generated by the motor has been reduced.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: JTEKT Corporation
    Inventors: Kunihiko SUZUKI, Keita NOMURA
  • Publication number: 20140064648
    Abstract: A guide piece projects from an outside surface of a cage bar of a cage so as to make sliding contact with a raceway surface of an outer ring. As the cage rotates, the guide piece operates to guide the rotation of the cage while removing an excess grease on the raceway surface and transferring the excess grease to axially opposite ends of the outer ring. The guide piece is formed with a through-hole extending from an inner periphery of the cage to an edge of the guide piece for supplying the lubricant from the inner periphery side of the cage to the raceway surface.
    Type: Application
    Filed: November 8, 2013
    Publication date: March 6, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Yuichiro HAYASHI
  • Publication number: 20140064647
    Abstract: A bearing unit includes an outer ring member having an outer periphery on which a flange portion is formed, the flange portion being fitted to a vehicle body side; an inner ring member that is rotatably inserted in the outer ring member; and rolling elements in double rows, which are rollably arranged between the outer ring member and the inner ring member, wherein bolts are press-fitted in bolt holes formed in a peripheral edge portion of a wheel fitting flange that is formed on an outer periphery of the inner ring member, and a recessed portion is formed in an outer peripheral surface of the wheel fitting flange.
    Type: Application
    Filed: August 6, 2013
    Publication date: March 6, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Masao TAKIMOTO, Ryoichiro KOTANI