Patents Assigned to JTEKT
  • Electric power steering system
    Patent number: 9126620
    Abstract: An electric power steering system includes: an assist motor that generate assist force for assisting steering of a steering member; a motor drive circuit that controls driving of the assist motor; a capacitor that is electrically connected to a main power supply that supplies electric power to the assist motor, the motor drive circuit, and electrical components; and a controller that controls charging and discharging of the capacitor. The controller discharges electricity to the electrical components when an amount of electric charge remaining in the auxiliary power supply is equal to or greater than a first threshold value in an engine start-up period in a vehicle.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: September 8, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Toyoki Sugiyama, Masayasu Higashi
  • State detection device for bearing roller, roller bearing device with sensor, and wind turbine generator
    Patent number: 9127649
    Abstract: A state detection device according to the invention includes a strain gauge that detects a physical state of a tapered roller, and a processing portion that obtains a detection signal that is output from the strain gauge, performs processing on the detection signal, and transmits detection data obtained by performing the processing on the detection signal, to an outside. The strain gauge and the processing portion are accommodated in a through-hole formed at an axis center of the tapered roller.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: September 8, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Shinya Matsuda
  • Vehicle steering system
    Patent number: 9126618
    Abstract: A vehicle steering system, in which a steering member and steered wheels are not mechanically coupled to each other, includes a rotation angle restriction mechanism that restricts a rotation angle of the steering member within a restricted angular range. In a failure mode, that is, in a case where a malfunction occurs in a steering angle sensor, a steering direction is detected on the basis of a strain of the rotation angle restriction mechanism, which is detected by one of strain gauges at a corresponding one of a pair of terminal ends of a restricted angular range. Drive control is executed on a steered system actuator on the basis of the detected steering direction.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: September 8, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Ryouhei Hayama
  • Ball bearing
    Patent number: 9127716
    Abstract: A cage holds a plurality of balls such that the balls are arranged at intervals in the circumferential direction. The cage is allowed to be in contact with an outer ring, and a portion of the outer ring, with which the cage is brought into contact, is only an inner periphery raceway groove. The cage is located so as to be apart from an inner ring.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: September 8, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata
  • OPERATION LIMITING DEVICE FOR MACHINE TOOL
    Publication number: 20150248124
    Abstract: An operation limiting device applicable to a wide variety of machine tools and which improves the freedom of setting an operation limiting area. Two or three drive axes (Xa, Za) in different directions are designated from among a plurality of drive axes in the machine tool and the designated drive axes (Xa, Za) form the two or three dimensional coordinate system. An area (Ar) for limiting the operation of the mobile body is set in the two or three dimensional coordinate system. A drive axis (Xa) which is in operation is determined, and in the two or three coordinate system including the drive axis which is in operation the operation of the mobile body is limited when the mobile body enters into the limiting area (Ar).
    Type: Application
    Filed: October 31, 2013
    Publication date: September 3, 2015
    Applicant: JTEKT CORPORATION
    Inventors: Akihiro Shimizu, Hiroaki Sugiura, Toshihiro Yonezu
  • Rotation angle detection device
    Patent number: 9121729
    Abstract: A rotation angle calculation unit includes a first rotation angle calculation portion, a second rotation angle calculation portion, a third rotation angle calculation portion, an abnormality monitoring portion, and a final rotation angle calculation portion. The abnormality monitoring portion determines, based on a first output signal, a second output signal, and a third output signal, whether the first to third output signals are each normal or abnormal. The final rotation angle calculation portion calculates a final rotation angle based on the final determination result obtained by the abnormality monitoring portion and the first to third rotation angles calculated by the first to third rotation angle calculation portions, respectively.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: September 1, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Takeshi Ueda
  • Steering apparatus
    Patent number: 9120503
    Abstract: A steering apparatus includes a gear lock mechanism that fastens a first side plate to a second side plate by a fastening member. In a lock operation, a main body of the fastening member of a fastening mechanism presses a second tooth row forming member toward the first side plate, and a guided projection of the fastening member rotates slightly in the range of play in a lock direction. The fastening member slightly rotates the second tooth row forming member in the lock direction via a restricting portion. During the slight rotation, a second tooth row of the second tooth row forming member is aligned with and meshes with a first tooth row of the first side plate.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: September 1, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Tomonori Sugiura, Kiyoto Takei
  • Torque detector and electric power steering system including the torque detector
    Patent number: 9121784
    Abstract: A torque detector includes a permanent magnet, a pair of magnetic yokes, and a magnetic sensor. The magnetic yokes include a first magnetic yoke and a second magnetic yoke. The first magnetic yoke has a first ring and a plurality of first teeth extending from the first ring in an axial direction. The second magnetic yoke has a second ring and a plurality of second teeth extending from the second ring in the axial direction. The first teeth extend in the axial direction beyond the second ring of the second magnetic yoke. The second teeth extend in the axial direction beyond the first ring of the first magnetic yoke.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: September 1, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Yutaro Ishimoto, Yoshitomo Tokumoto
  • KNEADING DEVICE
    Publication number: 20150239151
    Abstract: A kneading device includes: a preliminary kneading device that produces a preslurry by agitating a powder and a liquid introduced and transferring them while wetting the powder with the liquid; and a main kneading device that causes the powder to be uniformly dispersed in the preslurry supplied from the preliminary kneading device to produce a slurry. The main kneading device includes a gap defined by two conical surfaces that face each other with a predetermined distance therebetween and rotate relative to each other about their central axes. The slurry is produced by passing the preslurry through the gap. With the preliminary kneading device, the powder is dispersed in the liquid after conforming to the liquid, which suppress damage to the powder. The conditions of main kneading can be changed only by adjusting the gap, which facilitates the operation of changing the conditions of the main kneading.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 27, 2015
    Applicant: JTEKT CORPORATION
    Inventors: Takafumi FUJII, Masaru Fuse, Takumi Mio
  • APPARATUS AND PROCESS FOR PRODUCING ELECTRICITY STORAGE MATERIAL
    Publication number: 20150243963
    Abstract: A production apparatus for producing an electricity storage material is provided. The electricity storage material includes at least a thickener and an active material. The production apparatus includes a solution production device and a mixture-kneading device. The solution production device produces a surfactant-containing solution of the thickener. The mixture-kneading device kneads the solution together with a powder of the active material.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 27, 2015
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Koji NISHI, Sachiko KUBOTA, Jun ANDO, Yutaka ICHIHARA
  • Method of inspecting wheel hub unit
    Patent number: 9116095
    Abstract: In a method of inspecting a wheel hub unit configured by attaching a rolling bearing, which has an inner ring and an outer ring, to a hub wheel, an acoustic inspection dement is arranged so as to be in contact with an outer peripheral face of the outer ring, and the wheel hub unit (components except the outer ring) is rotated to measure an acoustic value of the outer ring and hence conduct inspection. When the wheel hub unit (components except the outer ring) is rotated, a preloading load that is equal to or higher than a load at which an axial internal clearance of the rolling bearing is a negative clearance is applied to the rolling bearing, and the axial internal clearance of the rolling bearing A is changed from a positive clearance before application of the load to a negative clearance after application of the load.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: August 25, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Shigeru Inoue, Kenjiro Matsumura, Masaki Yukawa
  • Tapered roller bearing
    Patent number: 9115760
    Abstract: A front bearing (tapered roller bearing) includes an inner ring, an outer ring, a plurality of tapered rollers, and a cage. The cage includes nail portions each extending from a first annular section facing a roller small end face, which is a small diameter side end face of the tapered roller, to an axially inward small rib end face of a small rib portion. The nail portions each support the tapered roller so as to form a gap between the roller small end face and the small rib end face by contact between the nail portion and the small rib end face.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: August 25, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Masashi Sakaguchi
  • Double-roller-type tripod constant-velocity joint
    Patent number: 9115764
    Abstract: One end face of an outer roller is provided with an annular rib that protrudes radially inward and that retains an inner roller and rolling elements. The other end face-side portion of the outer roller is provided with an inner component retaining portion that retains the inner roller and the rolling elements. In a roller unit in which the inner roller and the rolling elements are retained in the outer roller by the rib and the inner component retaining portion, an inner peripheral face of the inner roller through which a tripod shaft portion is passed is provided with a tripod shaft portion insertion restricting portion that allows the tripod shaft portion to be passed through the inner roller only from an end face side of the roller unit, on which the rib of the outer roller is not provided.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: August 25, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Koichiro Mizuno, Keishi Kobata
  • Control apparatus for four wheel drive vehicle
    Patent number: 9114706
    Abstract: An ECU of a four wheel drive vehicle controls a transmission torque of a driving force transmission apparatus provided between a rear differential and a left rear wheel. The ECU includes a first computation unit that computes a command torque to be transmitted to the left rear wheel by the driving force transmission apparatus, based on a traveling state of the four wheel drive vehicle; and a second computation unit that corrects the command torque computed by the first computation unit, if a difference between rotation speeds of a pair of side gears of the rear differential is larger than or equal to a predetermined value.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: August 25, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Masaki Mita, Hiroshi Takuno
  • Rolling bearing unit
    Patent number: 9109630
    Abstract: A rolling bearing unit includes: a rolling bearing having an inner ring, an outer ring arranged, multiple rolling elements, and a cage; and a cage guide member that is formed integrally with the outer ring or formed as a member different from the outer ring, and that is fixed to the housing side. The cage guide member has a guide projection projected into an annular space between the inner and outer rings and having an outer peripheral face a part of which serves as the guide face, and a grease supply portion having a grease reservoir portion in which the grease is reserved. A supply port through which the grease is supplied from the grease reservoir portion to the guide face is formed on the outer peripheral face of the guide projection, at a position closer to a base end portion of the guide projection than the guide face.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: August 18, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Yasuharu Misada
  • Motor vehicle steering system
    Patent number: 9108667
    Abstract: A motor vehicle steering system includes a knob for rotationally manipulating a steering member and a knob reaction force actuator for giving a reaction force in response to the rotation of the knob. The knob has a knob center and is supported by the steering member in a manner rotatable about the knob center. Holding the knob and manipulating the steering member causes the knob to rotate (spin) about the knob center as the steering member rotates. The knob reaction force actuator then gives an appropriate reaction force in response to the rotation (spinning) of the knob.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: August 18, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Ryouhei Hayama, Naotake Kanda
  • Torque limiter, variable transmission ratio device, and tolerance ring
    Patent number: 9109632
    Abstract: This torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body comprises a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: August 18, 2015
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, TOGO SEISAKUSYO CORPORATION
    Inventors: Toshihiro Asakura, Masatoshi Fujimoto, Toshiaki Ogata, Yukihiko Kanayama, Hirotsune Suzuki, Yuji Nakamura, Yuzo Hirakawa, Kenji Hayashi, Hiroyuki Toyoda
  • Web winding apparatus
    Patent number: 9102490
    Abstract: A web winding apparatus comprises two bobbins each being able to wind a web thereon; a cutter provided movably between the bobbin on one side and the bobbin on the other side for cutting the web being transferred; and a web pressing member provided at a position to face the cutter so that the web being transferred is put between the web pressing member and the cutter. The web pressing member is provided movably together with the cutter between the two bobbins, is configured to operate as cutter receiving member which presses and cuts the web in cooperation with the cutter, and is further configured to press a cut end of the web so cut on the bobbin being empty while holding the cut end of the web, to wind the cut end on the bobbin being empty.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 11, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Naohisa Niwa, Toshiyoshi Ichikawa, Norihito Sakakibara
  • Power generation device
    Patent number: 9097295
    Abstract: A one-way clutch used in a wind turbine generator connects an input rotor with an output rotor so that the input rotor and the output rotor are rotatable together with each other when a main shaft rotates in a forward direction and rotation speed of the input rotor is higher than rotation speed of the output rotor, and disconnects the input rotor and the output rotor from each other when the rotation speed of the input rotor is lower than the rotation speed of the output rotor. Further, the wind turbine generator includes a second one-way clutch that permits transmission of force caused by the rotation of the main shaft, to the input rotor when the main shaft rotates in the forward direction, and restricts the rotation of the main shaft when the main shaft tries to rotate in a reverse direction.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: August 4, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Hideki Fujiwara, Kazushige Ootsuka, Takafumi Uemoto, Nobuyuki Rito
  • Control board device with graphical user interface
    Patent number: D737309
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: August 25, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Koji Kito, Hiroyuki Takahara