Patents Assigned to JTEKT
  • Publication number: 20180331566
    Abstract: In a high output voltage mode, switching elements in a charging circuit are set to OFF; a first switching element is set to ON; second and third switching elements are set to OFF; one switching element in a discharging circuit is set to ON; and another switching element in the discharging circuit is set to OFF. During a main power failure, one of the switching elements in the charging circuit is set to OFF; another of the switching elements in the charging circuit is set to ON; the first switching element is set to OFF; the second and third switching elements are set to ON; the one switching element in the discharging circuit is set to ON; and the other switching element in the discharging circuit is set to OFF.
    Type: Application
    Filed: April 26, 2018
    Publication date: November 15, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Fumihiko SATO
  • Publication number: 20180327017
    Abstract: A steering device includes: an inner tube; an outer tube that fixes the inner tube by fastening the inner tube from an outer side, and has a first slit extending in an axial direction; a pair of clamp brackets that is disposed so that the clamp brackets face each other with the first slit therebetween; and a reinforcing member that is connected to one of the clamp brackets and also connected to a connection region that is a region of an outer circumferential surface of the outer tube and located farther on one side in the axial direction than an end of the first slit on the one side in the axial direction.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 15, 2018
    Applicants: JTEKT CORPORATION, HIRUTA-KOGYO CO., LTD.
    Inventors: Takuya SUZUKI, Daiki GOTO, Susumu IMAGAKI, Takahiro FUJII
  • Publication number: 20180328406
    Abstract: A thrust roller bearing cage having pockets for accommodating rollers includes an inner annular portion and cage bars that extend in a radial manner from a radially outer edge of the inner annular portion so as to separate the pockets from each other in a circumferential direction. The inner annular portion has a first axial end surface and a second axial end surface. The first axial end surface has an oil passage groove for guiding lubricating oil to the pockets. The second axial end surface is recessed more than the first axial end surface in an axial direction of the inner annular portion so as to form a recessed portion that communicates with the oil passage groove. The whole of a region of the first axial end surface that is located radially directly inside the cage bars is located radially outside the second axial end surface.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 15, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Yoshihito Nakashima
  • Publication number: 20180328407
    Abstract: A thrust roller bearing includes rollers arranged in a radial manner, an annular cage that retains the rollers such that the rollers are rollable, an annular outer race located on one side of the cage in an axial direction of the cage and having a first raceway on which the rollers roll, and an annular inner race located on the other side of the cage in the axial direction and having a second raceway on which the rollers roll. At least one of the first raceway and the second raceway has a Vickers hardness that is greater than or equal to 800 and less than or equal to 950. The outer circumferential surface of each of the rollers has a Vickers hardness that is greater than or equal to 697 and less than 800.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 15, 2018
    Applicant: JTEKT CORPORATION
    Inventor: Yoshihito NAKASHIMA
  • Patent number: 10124824
    Abstract: The steering apparatus includes a first seal member and a second seal member. The first seal member is fixed to one of an outer peripheral surface of a rack shaft and an inner peripheral surface of a housing. The first seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the other of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing. The second seal member is fixed to the other of the outer peripheral surface and the inner peripheral surface. The second seal member slidably contacts with a cylindrical surface which is centered on the axis and is provided on the one of the outer peripheral surface of the rack shaft and the inner peripheral surface of the housing.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: November 13, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT Corporation
    Inventors: Masaharu Yamashita, Hideya Kato, Akihisa Umetani, Masayuki Tsukagoshi
  • Patent number: 10124801
    Abstract: A four-wheel drive vehicle includes front wheels, rear wheels to which a driving force of an engine is transmitted via a propeller shaft, a dog clutch that enables blocking of transmission of the driving force from the engine to the propeller shaft, and a multi-disc clutch that enables blocking of transmission of the driving force from the propeller shaft to the rear wheels. During two-wheel driving in which the transmission of the driving force through the dog clutch and the multi-disc clutch is blocked, an ECU in the four-wheel drive vehicle calculates an estimated driving force estimated to be transmitted to the front wheels based on a vehicle speed and an amount of acceleration operation. The ECU allows the multi-disc clutch to transmit the driving force when the estimated driving force is larger than a driving force threshold defined according to a slip limit torque for the front wheels.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: November 13, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Masaki Mita
  • Patent number: 10126147
    Abstract: A rotation angle detection device is provided which can detect a mechanical angle of a motor having any number of pole pairs. An electrical angle detected by an AMR sensor is multiplied by ½. In the mechanical angle region of 180° to 360° where the output of the AMR sensor does not match the output of a GMR sensor, there is an offset difference of 180° between the electrical angle of the AMR sensor and the electrical angle of the GMR sensor. In this case, an offset value of 180° is added to the electrical angle of the AMR sensor. Adding the offset value in this region makes the output of the AMR sensor match the output of the GMR sensor. The AMR sensor is thus corrected. A calculated angle of the AMR sensor which is obtained by the correction is detected according to a change in mechanical angle.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: November 13, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Yuji Fujita
  • Publication number: 20180318973
    Abstract: A universal joint includes a bearing including a bearing cup fitted in a bearing hole of a yoke and rolling elements arranged between the bearing cup and a shaft portion of a cross shaft. A method for manufacturing the universal joint includes: simulating a shrunken state in which a sample bearing cup selected from bearing cups in a same lot is fitted in the bearing hole such that only an outside diameter is restrained, by press-fitting the sample bearing cup into a reference hole of a reference jig; measuring a diameter of an inscribed circle inscribed to the rolling elements in the shrunken state; setting an outside diameter of the shaft portion to a required outside diameter according to the diameter of the inscribed circle; and inserting the bearing cup with the rolling elements between the shaft portion having the required outside diameter and the bearing hole.
    Type: Application
    Filed: June 1, 2016
    Publication date: November 8, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Takeshi KOYAMA, Masanori KOBAYASHI
  • Publication number: 20180322976
    Abstract: An optical tweezers device determines trapping force data indicating a trapping force for a particle on the basis of a distance between the particle trapped by focusing laser beam with a lens and a focal point of the lens. The optical tweezers device determines a difference between a trapping force theoretical value that is estimated according to a linear relationship between the distance between the trapped particle and the focal point of the lens and the trapping force for the particle and the trapping force indicated by the trapping force data. The optical tweezers device controls a laser power of the light source on the basis of the difference of the trapping force.
    Type: Application
    Filed: October 21, 2016
    Publication date: November 8, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Kota NANRI, Toshiyuki SAITO, Kensuke SUZUKI
  • Patent number: 10119568
    Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage. An annular groove for creep suppression is formed in a fitting surface of the outer ring to be fitted with a mating member (housing) to which the outer ring is to be mounted. An outer ring track groove with which the balls make rolling contact is formed in the inner peripheral surface of the outer ring on the side opposite to the fitting surface. The entire contact ellipse generated when each of the balls and the outer ring track groove contact each other is positioned within the axial range of the outer ring in which the annular groove is formed.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: November 6, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Yasuhiko Ishii, Yuu Yasuda
  • Patent number: 10119885
    Abstract: A rolling bearing apparatus includes a bearing main body having an outer ring that is a fixed ring and an inner ring that is a rotating ring, the outer ring and the inner ring being concentrically provided, and a plurality of rolling elements provided between the outer ring and the inner ring, and a control unit having a vibration detector attached to the outer ring and a calculation unit that calculates a value for vibration of the bearing main body and a rotation speed thereof based on a detection signal from the vibration detector. The calculation unit calculates the rotation speed based on frequency components of vibration obtained from the detection signal and the number of vibrations inherent in the bearing main body.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 6, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Yoshimichi Higashiyama, Masami Naka, Tsukasa Sakazaki
  • Patent number: 10118640
    Abstract: A damper apparatus includes a shock-absorbing member configured to absorb a shock while restricting movement of a shaft relative to a housing. The shock-absorbing member includes a shock-receiving member configured to come into contact with one member, which is one of a large-diameter portion of the shaft and a restriction portion of the housing, and a pre-compression spring disposed between the other member, which is the other of the large-diameter portion and the restriction portion, and the shock-receiving member in a state where the pre-compression spring is compressed in advance in an axial direction. The pre-compression spring is configured to urge the one member in the axial direction via the shock-receiving member when the large-diameter portion is relatively moved toward the restriction portion beyond a prescribed position.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: November 6, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Toshiaki Ogata
  • Patent number: 10118268
    Abstract: A machine tool includes a thermoacoustic apparatus and a fluid supply apparatus, utilizes exhaust heat from a constituent apparatus of the machine tool to cool a heat exchanger included in the thermoacoustic apparatus due to a thermoacoustic effect. Thus, a cooling fluid is cooled which is used to cool a bearing and a machining point.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: November 6, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Toshiyuki Saito
  • Publication number: 20180312194
    Abstract: A steering control apparatus determines whether one of an upper variation angle and a lower variation angle is greater than a first threshold value. When one of the upper variation angle and the lower variation angle is greater than the first threshold value, the steering control apparatus determines the state of a clutch in accordance with the result of a comparison between a resulting angle difference variation and a second threshold value. The steering control apparatus updates a reference upper steering angle and a reference lower steering angle such that the reference upper steering angle and the reference lower steering angle respectively correspond to an upper steering angle and a lower steering angle obtained in a predetermined calculation period.
    Type: Application
    Filed: April 19, 2018
    Publication date: November 1, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Isao NAMIKAWA, Naoki YAMANO
  • Publication number: 20180311735
    Abstract: An additively shaped article manufacturing method includes: a first step of feeding a plurality of base material particles and a plurality of microparticles both constituting metal powder to an irradiation area of a shaping optical beam; and a second step of applying the shaping optical beam to the microparticles and respective irradiated surfaces that are respective surfaces of the base material particles on a side to be irradiated with the shaping optical beam. The microparticles are formed of a metal identical in type to the base material particles and have an average volume smaller than the average volume of the base material particles. The microparticles fed to the irradiation area at the first step are arranged to be in contact with the respective irradiated surfaces of the base material particles.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 1, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Tetsuya Mitsui, Yoshinori Imoto, Takaya Nagahama, Koichi Shiiba, Makoto Tano
  • Patent number: 10116193
    Abstract: An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. The linear portion has a first end and a second end located closer to an outer periphery of the rotor core than the first end is. A gate mark is located on the second end of the linear portion on at least one of the axial end faces of the resin magnet.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: October 30, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Ryosuke Yamaguchi, Keita Nimura, Koji Tachi
  • Publication number: 20180307026
    Abstract: An optical tweezers device includes: an acquisition unit which acquires basic movement information indicating a movement of a stage; a conversion unit which converts the movement of the stage indicated by the basic movement information into a movement of a particle being trapped and generates converted movement information indicating the movement of the particle; and a distance calculation unit which determines a distance between the particle being trapped by the laser beam and a focal point of the lens. The conversion unit generates the converted movement information by correcting the movement of the particle using the distance determined by the distance calculation unit.
    Type: Application
    Filed: October 21, 2016
    Publication date: October 25, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Kota NANRI, Toshiyuki SAITO, Kensuke SUZUKI
  • Publication number: 20180306343
    Abstract: A solenoid valve includes a coil, a valve element receiving portion, a valve element placed inside of the valve element receiving portion, and a valve portion configured to open and close a gas flow path accompanied with move of the valve element. Either a surface of the valve element opposed to the valve element receiving portion or a surface of the valve element receiving portion opposed to the valve element has a first groove that is extended in an axial direction and a second groove that is arranged to intersect with the first groove and to be extended in a circumferential direction. The first groove is formed to be extended at least from the second groove toward a valve portion-side.
    Type: Application
    Filed: April 11, 2018
    Publication date: October 25, 2018
    Applicants: SOKEN, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Ryosuke HORI, Hiroki YAHASHI, Koji KIDA, Akio NAKAMURA, Takuya SUZUKI
  • Publication number: 20180304915
    Abstract: A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 25, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Naofumi KAWAMURA, Hirofumi UEDA, Kaname JOUSHITA
  • Publication number: 20180304917
    Abstract: A power steering device for an axle assembly provided with a limited-slip differential designed to transmit a drive torque to a first and second wheel and to automatically activate, in the event of a loss of synchronism and/or of grip of one of the first and second wheels, an operating mode referred to as “lockup mode” in which differential transfers most of the driving torque to the slower of the first and second wheels, the power steering also including a steering mechanism and a power steering motor controlled by a control module, steering control module containing compensation laws which allow the power steering motor to compensate for certain effects, such as alternating load backup or freezing, induced in the steering mechanism by activation of the differential lockup mode, so as to give the driver a feel close to that of an axle assembly that does not have a lockup mode.
    Type: Application
    Filed: June 7, 2016
    Publication date: October 25, 2018
    Applicant: JTEKT EUROPE
    Inventors: André MICHELIS, Fabrice NOBILI