Patents Assigned to JTEKT
  • RACK BUSHING
    Publication number: 20170009806
    Abstract: A cylindrical rack bushing is interposed between a tubular housing and a rack shaft inserted coaxially through the housing, and supports the rack shaft so that the rack shaft is slidable in an axial direction. The rack bushing has an inner periphery on which an inward protruding portion protruding toward an inner side of the rack bushing in a radial direction is formed. The inward protruding portion includes a top portion that is in sliding contact with the rack shaft in a line contact manner or a point contact manner.
    Type: Application
    Filed: July 5, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Tetsuo IKEDA, Hidetoshi SUMIHARA
  • DETERMINATION OF AN ANGULAR REFERENCE POSITION OF A POWER STEERING SYSTEM FROM RISING AND FALLING EDGES OF AN INDEX SIGNAL
    Publication number: 20170008556
    Abstract: A method for determining an absolute power steering reference position, which includes: a step of acquiring a first edge position corresponding to a first edge of a first index pulse generated when the movable steering member passes an indexed position in a first movement direction; a step of acquiring a second edge position corresponding to a second edge of a second index pulse generated when the movable steering member passes the same indexed position in a second movement position opposite the first movement direction; and a step of calculating a reference position, during which an power steering reference position is calculated from an average of the first edge position and the second edge position.
    Type: Application
    Filed: January 29, 2015
    Publication date: January 12, 2017
    Applicant: JTEKT EUROPE
    Inventors: Romaric PREGNIARD, Christophe RAVIER, Xavier PALANDRE
  • Steering System
    Publication number: 20170008548
    Abstract: A steering system includes: a first tooth member provided with a first tooth row that includes a plurality of first teeth each of which has a tooth trace extending in a lateral direction and which are aligned along a tilt direction, the first tooth row being elastically deformable in the lateral direction, and a second tooth member including a second tooth row that includes a plurality of second teeth each of which has a tooth trace extending in the lateral direction and which are aligned along the tilt direction, the second tooth member facing the first tooth member in the lateral direction. The first tooth member is supported by an upper bracket such that the first tooth row is disposed away from the upper bracket in the lateral direction. The second tooth member is movable in the tilt direction along with a column jacket.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hidenobu TANAKA, Hiromitsu TOMIYAMA, Masayuki NAGAOKA, Kenichi AOTA
  • Steering System
    Publication number: 20170008549
    Abstract: A steering system includes: an upper bracket that supports a column jacket so that the column jacket is pivotable about a central shaft; a pair of first tooth rows that are supported by the upper bracket and are arranged side by side in an axial direction; and a tooth member that is pivotable together with the column jacket and is movable in a right-and-left direction. The tooth member has second teeth that are formed in two locations spaced apart from each other in the axial direction and that can mesh with the pair of the first tooth rows. The tooth tip angle of first teeth in one first tooth row of the pair of the first tooth rows is different from the tooth tip angle of the first teeth in the other first tooth row that is more distant from the central shaft than the one first tooth row.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiromitsu TOMIYAMA, Hidenobu TANAKA, Masayuki NAGAOKA
  • Manufacturing Method for Magnet and Magnet
    Publication number: 20170011847
    Abstract: A manufacturing method for a magnet is provided which includes molding, under pressure, magnetic powder in a form of secondary particles resulting from aggregation of primary particles, to obtain a molding. A ratio of an average particle size of the primary particles to a maximum particle size of the secondary particles is 1:150 to 1:200. The magnet in the invention is manufactured by the manufacturing method for a magnet in the invention. The invention allows manufacture of the molding and the magnet in both of which the magnetic powder is densely compressed. The magnet has a high residual magnetic flux density.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
  • Gear machining apparatus
    Patent number: 9539659
    Abstract: A gear machining apparatus causes a machining tool and a workpiece to rotate at a high speed in synchronization with each other to machine a highly accurate gear through cutting. The machining tool is manufactured such that each of pitches between tool blades of the machining tool is an integer multiple of a pitch between teeth of the gear, the integer multiple being equal to or larger than double. By using the machining tool for cutting performed by the gear machining apparatus, the number of the tool blades of the machining tool, which are brought into contact with the workpiece at the same time, is reduced. Thus, it is possible to suppress occurrence of self-excited vibrations during cutting by reducing the cutting resistance. Thus, it is possible to enhance the tooth trace accuracy of the gear.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: January 10, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hisashi Otani, Hiroyuki Nakano, Hiroaki Goshima
  • MANUFACTURING METHOD OF ROTOR AND ROTOR
    Publication number: 20170005554
    Abstract: A rotor includes a rotor core having magnet holes that open to both sides in an axial direction, and magnets placed in the magnet holes. A method for manufacturing the rotor includes: the placing step of placing a material of the magnets containing at least magnetic particles in the magnet holes; and the forming step of forming compacts by compressing the material of the magnets in the magnet holes in the axial direction of the rotor with punch members by using the rotor core as a part of a forming die.
    Type: Application
    Filed: June 27, 2016
    Publication date: January 5, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Takashi TAMURA, Yusuke KIMOTO
  • MANUFACTURING METHOD OF ROTOR AND ROTOR
    Publication number: 20170005553
    Abstract: In a method for manufacturing a rotor, each magnetic steel sheet has protrusions on its one surface and has recesses on the other surface at positions corresponding to the protrusions. The plurality of magnetic steel sheets are joined together as the protrusions of each magnetic steel sheet are fitted in the recesses of its adjoining magnetic steel sheet. A shaft member is inserted into a rotor core in the same direction as that in which the protrusions protrude.
    Type: Application
    Filed: June 27, 2016
    Publication date: January 5, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Takashi TAMURA, Yusuke KIMOTO
  • Steering apparatus
    Patent number: 9533700
    Abstract: A steering apparatus includes a steering shaft; a column jacket including an outer jacket including a slit and a pair of fastened portions, and an inner jacket; a bracket; a fastening mechanism; an engaged tooth formation member including at least one engaged tooth and fixed to the inner jacket; a support shaft including end portions supported by support holes of the fastened portions; an engaging tooth formation member including an engaging tooth that engages with the engaged tooth; and a biasing member configured to bias the support shaft in a biasing direction. One of the fastened portions or a member supported by the one fastened portion includes a positioning portion configured to position the support shaft in the biasing direction.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: January 3, 2017
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Takahashi, Tomonori Sugiura, Shoji Ishimura, Tatsuro Kubota, Shigeru Hoshino
  • MANUFACTURING METHOD FOR MAGNET AND MAGNET
    Publication number: 20160375488
    Abstract: A manufacturing method for a magnet has step of molding magnetic powder under pressure to obtain a molding. The magnetic powder is pressurized using a mold to which a release agent is applied. The release agent is chemical synthesis oil to which an extreme pressure additive is added.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 29, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
  • VEHICULAR STEERING SYSTEM
    Publication number: 20160375930
    Abstract: A vehicular steering system includes a driving wheel, a wheel drive actuator that rotationally drives the driving wheel, a steering operation mechanism that steers the driving wheel, a steering operation actuator that applies a steering operation force that is used to steer the driving wheel to the steering operation mechanism, and a hydraulic circuit that transmits the rotational driving force of the wheel drive actuator to the steering operation mechanism via hydraulic oil as a steering operation force.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 29, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Masanori ARIMA, Yasuhiko HASUDA, Keita NIMURA
  • MANUFACTURING METHOD FOR MAGNET AND MAGNET
    Publication number: 20160379755
    Abstract: A manufacturing method for a magnet includes: a step of obtaining mixed powder of magnetic powder and a lubricant; a step of mixing the mixed powder with an uncured binder that is a silicone composition to attach the binder to a surface of the mixed powder; a step of molding the mixed powder under pressure to obtain a molding, and a step of curing the silicone composition to bind particles of the magnetic powder together,
    Type: Application
    Filed: June 17, 2016
    Publication date: December 29, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
  • Production apparatus and production method for electric storage material
    Patent number: 9531007
    Abstract: A production apparatus for an electric storage material includes a dissolution device that dissolves a thickener in a solvent by applying vibration to the solvent, and a kneading device that kneads a solution of the thickener having an adjusted viscosity and an active substance. The thickener is dissolved in the solvent, and a powder of the active substance and the like are dispersed and kneaded in the solution of the thickener having the adjusted viscosity. Thus, kneading can be performed in a short time, and damage to the active substance can be suppressed.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: December 27, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Takumi Mio, Koji Nishi, Junya Fujita, Yoshifumi Fukaya, Takafumi Fujii, Kazuya Suzuki
  • Steering System
    Publication number: 20160368528
    Abstract: A steering system includes: a steering shaft to which a steering member is coupled; a worm wheel attached to the steering shaft so as to be rotatable integrally with the steering shaft; a housing that houses the worm wheel; an output shaft that is coaxial with the steering shaft and rotatable relative to the steering shaft and coupled to a steering operation mechanism; and a clutch mechanism that enables and disables transmission of power between the steering shaft and the output shaft. The clutch mechanism is housed and disposed in an internal space in the housing.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 22, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Akihiko SHIINA
  • ELECTRIC POWER STEERING SYSTEM
    Publication number: 20160368533
    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: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Yuji KARIATSUMARI, Tatsuma KOUCHI
  • SLIDING CONSTANT-VELOCITY JOINT
    Publication number: 20160369848
    Abstract: A sliding constant-velocity joint includes: an outer ring, in the inner surface of which a plurality of raceway grooves are formed; a tripod member that transfers torque between the outer ring and a shaft; an intermediate member that swingably supports a tripod shaft portion of the tripod member; a plurality of rolling elements that can roll along the outer surface of the intermediate member; and a cage that holds the rolling elements. The amount of movement of the intermediate member in a radial direction of the outer ring is restrained such that the intermediate member does not contact a neck portion of the tripod shaft portion or a boss portion because of tilt motion of the intermediate member caused along with swing motion of the tripod shaft portion during rotation of the outer ring and the shaft.
    Type: Application
    Filed: June 13, 2016
    Publication date: December 22, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Keishi KOBATA
  • Steering System
    Publication number: 20160368529
    Abstract: A steering system includes: a steering shaft to which a steering member is coupled; a worm wheel attached to the steering shaft so as to be rotatable integrally with the steering shaft; a housing that houses the worm wheel; an output shaft that is coaxial with the steering shaft and rotatable relative to the steering shaft and coupled to a steering operation mechanism; and a clutch mechanism that enables and disables transmission of power between the steering shaft and the output shaft. The clutch mechanism is housed and disposed in an internal space in the housing. A solenoid in the clutch mechanism is disposed on the opposite side of the worm wheel in an axial direction from a mechanical portion of the clutch mechanism.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 22, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Akihiko SHIINA
  • SLIDING CONSTANT VELOCITY JOINT
    Publication number: 20160369845
    Abstract: A sliding constant velocity joint 1 includes: an outer ring serving as an outer member; a tripod member serving as an inner member; an intermediate member that is formed by a pair of divided members placed so as to be separated from each other with a head of a tripod shaft portion interposed therebetween; a plurality of rolling elements that roll on first and second raceway surfaces of the outer ring; and a cage holding the plurality of rolling elements. When the rolling elements are pressed by the pair of divided members and the bodies of the rolling elements are brought into contact with the pair of raceway surfaces, there is predetermined clearance between an outer peripheral surface of a needle-like projection of each rolling element and outer side surfaces in first and second grooves.
    Type: Application
    Filed: June 13, 2016
    Publication date: December 22, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Keishi KOBATA
  • Sliding member
    Patent number: 9523059
    Abstract: In a sliding member, a sliding surface of a substrate of fluorine rubber on which another member slides is covered with a coating that is formed of an epoxy resin having a scratch hardness (Pencil Method) after curing of F to 2H and in which fluorine resin powder is dispersed.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: December 20, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Takeshi Kunishima, Takashi Amoh, Keisuke Miyamoto, Masako Jimbo
  • Shaft-to-universal joint coupling structure
    Patent number: 9523392
    Abstract: A shaft-to-universal joint coupling structure includes: a column shaft; a universal joint including a shaft yoke; a sleeve to which the column shaft and the universal joint are fitted; and a coupling pin inserted into a through-hole of the shaft yoke and an insertion hole of the sleeve. The coupling pin has a small-diameter portion inserted into the insertion hole, and a step portion positioned inward of an inner peripheral face of the sleeve in the radial direction of the sleeve.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: December 20, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Osamu Honda, Masaru Yamawaki, Mitsuharu Ozaki, Naoji Kawasoko