Patents Assigned to JTEKT
  • Rolling Bearing Device
    Publication number: 20170350450
    Abstract: A rolling bearing device includes a first bearing section including a first outer ring, a first inner ring, and a plurality of balls, each of which is made of metal, and a second bearing section including a second outer ring, a second inner ring, and a plurality of balls, each of which is made of metal. The first inner ring and the second inner ring are electrically connected to each other, and the first outer ring and the second outer ring are electrically insulated from each other. The first outer ring is provided with an input contact for an electric signal, and the second outer ring is provided with an output contact for the electric signal.
    Type: Application
    Filed: May 30, 2017
    Publication date: December 7, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hajime WATANABE, Yusuke AOKI
  • CONSTANT VELOCITY JOINT AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20170350455
    Abstract: Outer ball grooves of an outer joint member of a constant velocity joint each have a first ball groove for allowing a ball to roll therein when the constant velocity joint operates, and a second ball groove having a ball groove radius larger than a ball groove radius of the first ball groove. The second ball groove has a curved line and a connecting line. The curved line is connected to a groove bottom end of the first ball groove located closer to an opening of the outer joint member and is curved radially outward in a concave manner. The connecting line connects the curved line and the opening. The curved line is curved with a curvature center that is located closer to the opening than the groove bottom end of the first ball groove and that is located radially inside the outer joint member.
    Type: Application
    Filed: June 5, 2017
    Publication date: December 7, 2017
    Applicant: JTEKT Corporation
    Inventors: Tatsuya YOSHII, Yoshinari Sakai, Yoshimi Aoki, Tomohiro Nishida, Tomo Shigeno
  • Gear reducer having a sealing plug providing axial support to a spring for gear slack compensation
    Patent number: 9835240
    Abstract: The invention relates to a gear reducer (1) for an assisted-steering module, including a casing (3), a worm (4) which meshes with a worm wheel (6), and a spring (10) for taking up gear play, which presses said worm (4) radially against the worm wheel (6), the wall of the casing (3) being bored, away from of the axis (XX?) of the worm, with an opening (14) sealed by a plug (15), the spring (10) for taking up gear play including at least one retaining lug (17, 18) which projects radially to the axis (XX?) of the worm (4), and the hub (20) of the plug (15) having a guiding wall (21) that is substantially transverse to the axis (XX?) of the worm (4), which is designed to be placed axially opposite said at least one retaining lug (17, 18), in order to prevent the axial movement of the spring (10) beyond a predetermined functional travel.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: December 5, 2017
    Assignee: JTEKT EUROPE
    Inventors: Philippe Chauvrat, Caroline Gex
  • Control method and control device for dog clutch
    Patent number: 9835209
    Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; an electromagnetic coil; and a position detecting portion. A control method for the dog clutch, includes: supplying an exciting current to the electromagnetic coil when the clutch member is moved from the non-connecting position toward the connecting position; and promptly reducing the exciting current when the position detecting portion detects that the clutch member has moved to the connecting position.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: December 5, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Minoru Onitake, Yasunori Kamitani
  • ELECTRIC POWER STEERING SYSTEM
    Publication number: 20170341680
    Abstract: An electric power steering system includes a rack housing configured to accommodate a rack shaft, a pinion shaft meshed with the rack shaft, a speed-reducer including a worm wheel connected to a portion of the second pinion shaft protruding from the rack housing, a speed-reducer housing configured to accommodate the speed-reducer, and a seal member having an annular shape. The seal member is disposed closer to the second pinion gear than the worm wheel is, in the speed-reducer housing. The sear member seals a clearance between the second pinion shaft and the speed-reducer housing.
    Type: Application
    Filed: May 18, 2017
    Publication date: November 30, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiroshi YANO, Hiroshi NEGORO
  • Ball Screw Device and Steering System
    Publication number: 20170343088
    Abstract: A ball screw device and a steering system that include a retainer having more uniform stiffness are provided. Between a rack shaft and a ball screw nut, a cylindrical retainer having a plurality of retainer grooves that retain balls in a rollable manner is provided. Each retainer groove has two short inner surfaces that intersect the extending direction of the retainer groove and two long inner surfaces that intersect these short inner surfaces and extend along the extending direction of the retainer groove. In each of interior-angle portions where the short inner surfaces and the long inner surfaces intersect, a corner round surface is formed. The radius of the corner round surface is set to be smaller than one half of the width of the retainer groove.
    Type: Application
    Filed: May 23, 2017
    Publication date: November 30, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Toshihiro ASAKURA, Takuya NAKAYAMA, Keisuke OGAWA
  • Ball Screw Device and Steering System
    Publication number: 20170343087
    Abstract: A ball screw device is provided, including a retainer that can properly retain balls. The difference between a diameter being the pitch circle diameter of the ball screw device and the outside diameter of the rack shaft is set to be equal to or larger than the difference between the bore diameter of a ball screw nut and the diameter. The thickness center diameter of the retainer is set to be smaller than the diameter. Even when the inclination angle is reduced, the clearance between the inclined surfaces of each retainer groove on the radial inside can be easily set to be smaller than the diameter of the balls because the bore diameter of the retainer is set to be smaller. Thus, even when the inclination angle of the inclined surfaces is set to be smaller, the balls can be properly retained.
    Type: Application
    Filed: May 22, 2017
    Publication date: November 30, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Toshihiro ASAKURA, Takuya NAKAYAMA, Keisuke OGAWA
  • One-way clutch and one-way clutch unit for wind power generation device
    Patent number: 9829053
    Abstract: A one-way clutch, disposed between an input rotating body and an output rotating body, is used to connect the input and output rotating bodies so that the rotating bodies are rotatable integrally in a state in which the rotation speed of the input rotating body is higher than that of the output rotating body and to cut off the connection between the input and output rotating bodies in a state in which the rotation speed of the input rotating body is lower than that of the output rotating body. A plurality of engaging elements or an inner ring and an outer ring constituting the one-way clutch are made of a base material obtained by subjecting a martensitic stainless steel material to soft nitriding treatment, and the Vickers hardness of the portion up to 20 ?m from the surface of the contact portion thereof is 1000 to 1500 Hv.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: November 28, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Hideki Fujiwara
  • Motor control apparatus and power steering system
    Patent number: 9831807
    Abstract: A motor control apparatus includes an inverter, a driver, a negative voltage circuit, a voltage dividing circuit, and a detection unit. The inverter includes an upper-arm switching element and a lower-arm switching element to supply a voltage of a node between the upper-arm switching element and the lower-arm switching element to a motor as a phase voltage. The driver applies a first voltage or a second voltage to the upper-arm switching element to control and turn the upper-arm switching element on and off. The negative voltage circuit supplies a voltage lower than the voltage of the node to the driver as the second voltage. The voltage dividing circuit performs voltage division between the negative voltage circuit and a negative power supply. The detection unit outputs a signal based on a voltage resulting from the voltage division by the voltage dividing circuit.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: November 28, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Kitamoto
  • Screen definition device for operating panel
    Patent number: 9830053
    Abstract: A screen definition device includes a screen data generating unit that outputs screen data generated by combining model screen data in which section information is set, with screen definition tables for the model screen data; a screen data combining unit that combines the screen data with the other screen data based on a reference relation indicated by link information of the screen data and the link information of the other screen data; and a screen definition table setting unit that sets screen definition tables in a table form.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: November 28, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Terukazu Senda, Kentaro Takasu
  • BALL SCREW MECHANISM AND STEERING SYSTEM
    Publication number: 20170334479
    Abstract: A ball screw mechanism that allows a reduction in contact and friction between a retainer and a nut is provided. In a ball screw mechanism, a nut is threadedly engaged with a screw groove of a rack shaft through balls retained in a retainer groove of a retainer, and an axial force is applied to the rack shaft in accordance with rotation of the nut. The nut includes a uniform diameter portion having a uniform inside diameter and enlarged diameter portions each having an inside diameter larger than that of the uniform diameter portion. The enlarged diameter portions are provided at opposite axial ends of a region on an inner circumferential surface of the nut. The region faces the retainer groove and retainer ends adjoining to opposite axial ends of the retainer groove.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Toshihiro ASAKURA, Takuya NAKAYAMA, Keisuke OGAWA
  • WHEEL BEARING APPARATUS
    Publication number: 20170335890
    Abstract: A wheel bearing apparatus includes a hub shaft having a flange to which a wheel is attached and which is located on a vehicular outer side, an outer ring, a plurality of rolling elements, an annular seal member, and an annular slinger. The slinger has a circular ring portion that is in contact with the flange and a tube portion extending from the circular ring portion toward a vehicular inner side. The tube portion has pawl portions located on the vehicular inner side to engage with a recessed portion of an outer periphery of the hub shaft to inhibit the slinger from being displaced toward the vehicular inner side. The tube portion is further provided with a plurality of slits that is formed along a circumferential direction and that is open on the vehicular inner side. The slits include slits with different depths.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventor: Eishou HARADA
  • Gear Pump
    Publication number: 20170335846
    Abstract: In a gear pump, a gear chamber is defined in a housing hole of a housing. A pair of gears is housed in the gear chamber. The gears are rotatably supported at support holes of a pair of side plates via support shafts. As viewed in an axial direction of the support shafts during rotation of the gears, addendum circles of the gears displaced under a differential pressure between a low-pressure chamber and a high-pressure chamber form first contact points with respect to an inner peripheral surface that defines a housing hole. As viewed in the axial direction of the support shafts during rotation of the gears, the first contact points are covered with the side plates displaced under the differential pressure.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventor: Naohito YOSHIDA
  • TAPER ROLLER BEARING
    Publication number: 20170335886
    Abstract: An annular cage provided with a taper roller bearing includes: a small-diameter annular portion, a large-diameter annular portion, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion to each other, and further includes roller retaining portions which prevent taper rollers accommodated in pockets from falling out to the outer side in the radial direction. Each of the roller retaining portions has a shape of a protruding beam that is a fixed end on the column portion side and on the small-diameter annular portion side, extends in the circumferential direction and in a column portion longitudinal direction, and is a free end on the tip end side in the extending direction.
    Type: Application
    Filed: October 23, 2015
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Shigeo KAMAMOTO, Junji MURATA, Yuki SHISHIHARA, Tomohiko HARUYAMA
  • SEMICONDUCTOR DEVICE AND MOTOR APPARATUS
    Publication number: 20170339789
    Abstract: A semiconductor device is provided that allows an IC chip and a heat sink to be prevented from being short-circuited even if facing surfaces of the IC chip and the heat sink are located closest to each other due to manufacturing variations and other variations. A controller for a motor apparatus includes a substrate on which MOSFETs are mounted and a heat sink provided facing the substrate and the MOSFETs so as to dissipate heat generated by the MOSFETs. Insulating portions are each provided on a facing surface of each MOSFETs. Protruding portions are each provided on a facing surface of the heat sink so as to protrude from the heat sink toward the insulating portion of the corresponding MOSFET. A second clearance smaller than the first clearance is formed between each of the insulating portions and the corresponding protruding portion.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventor: Yuto SATO
  • Manufacturing Method for Gear
    Publication number: 20170334110
    Abstract: Over an outer peripheral surface of a sleeve, a primer layer is formed that is a thermoplastic resin-based adhesive thermally melted at a temperature lower than a melting point of a thermoplastic resin formed into a resin member to exhibit adhesiveness. With the sleeve preheated, a thermoplastic resin to be formed into the resin member is annularly injection-molded over an outer periphery of the sleeve.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takeshi KUNISHIMA, Tsuyoshi KAMIKAWA, Yoshitomo NAGAI
  • SENSOR UNIT AND MAGNETISM COLLECTING MODULE AND SENSOR APPARATUS
    Publication number: 20170336276
    Abstract: A sensor unit and a sensor apparatus are provided in which the size of the sensor unit itself is prevented from varying regardless of whether or not a redundant sensor is included, eliminating the need to change the design of a component to which the sensor unit is attached. Terminals of a sensor unit include a plurality of lead connection portions to which Hall ICs can be attached and a plurality of cable connection portions electrically connected to outside. The terminals are provided according to the number of sensors so as to enable the Hall ICs corresponding to two magnetic sensors to be attached to the terminals. A lead to the Hall IC corresponding to at least one magnetic sensor is connected to the terminals.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Yuichi TOYAMA, Takatsugu ASANO
  • UNIVERSAL JOINT YOKE AND INTERMEDIATE SHAFT
    Publication number: 20170335893
    Abstract: A first yoke includes a tubular portion extending in a first direction, a flange, and a pair of arms extending from the flange. Support holes for a joint spider are formed at tips of the respective arms. The arms have respective inner surfaces facing each other in a second direction. Each of the inner surfaces includes a first recessed portion and a second recessed portion as viewed in a third direction orthogonal to the first direction and the second direction. The first recessed portions are recessed such that the distance between the inner surfaces of the arms increases from a start end located closer to an opening edge of each support hole toward an end point located closer to a base end of the arm. Each of the second recessed portions connects the end point to an end surface of a flange so as to form a curved surface.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 23, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takeshi KOYAMA, Naoki TSUJI, Kazunori NAKAYAMA, Nobuaki SHIBATA, Atsuhiro YOSHIDA
  • Electric power steering system
    Patent number: 9821836
    Abstract: Restriction values (upper limit and lower limit) for an assist control amount are set individually for each of state amounts including steering torque ? used to compute the assist control amount. A value obtained by summing such restriction values is set as a final restriction value for the assist control amount. Even though the assist control amount with an abnormal value is computed, the assist control amount is restricted to an appropriate value by the final restriction value. In addition, a transition is made from a primary assist control amount which is restricted to a secondary assist control amount computed separately from the primary assist control amount at the timing when a certain time elapses since the assist control amount is restricted. As the steering torque ? is increased, the speed of transition from the primary assist control amount to the secondary assist control amount is increased.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: November 21, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hidenori Itamoto, Terutaka Tamaizumi, Shingo Maeda
  • Programmable controller
    Patent number: D803911
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: November 28, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Kazuma Suzuki, Yasunori Tsuboi, Koji Hasegawa, Sutemaro Kato