Patents Assigned to JTEKT
  • Bearing cup and cross shaft joint
    Patent number: 9404530
    Abstract: A cross shaft joint includes a bearing cup, a cross shaft, and a joint yoke. The bearing cup includes a cylindrical portion in which an opening portion for receiving a shaft portion is formed in one end of the cylindrical portion in an axis direction, and a bottom portion that closes the other end of the cylindrical portion in the axis direction. The bearing cup is press-fitted into the fitting hole and supports the shaft portion through a rolling element so that the shaft portion is able to rotate. The bearing cup is fitted onto the shaft portion inside the fitting hole and holds the rolling element with the shaft portion. A diameter of an inner peripheral surface of the cylindrical portion is smaller on the opening portion side than the bottom portion side in a free state of the bearing cup before being press-fitted into the fitting hole.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: August 2, 2016
    Assignees: JTEKT CORPORATION, KOYO MACHINE INDUSTRIES CO., LTD.
    Inventors: Takeshi Koyama, Masanori Kobayashi, Hirotsugu Kusano, Kenichi Hashimoto, Hiroshi Kobayashi
  • STEERING SYSTEM
    Publication number: 20160214640
    Abstract: A steering system includes an engaged member fixed to an upper jacket, an engaging member rotatably supported by a lower jacket, and an impact absorbing member including a movable portion that moves together with the engaging member at the time of a secondary collision, to absorb impact made at the time of the secondary collision. The engaged member has a plurality of engaged teeth. The engaging member comes into engagement with the engaged teeth in accordance with an operation of an operation member. At the time of the secondary collision, the engaging member is disengaged from the lower jacket, and moves along with the upper jacket while in engagement with the engaged teeth.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 28, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Masayoshi SAKUDA, Atsumune NAGATANI, Yu MYOHOJI
  • HYDROSTATIC BEARING APPARATUS, MACHINE-TOOL MAIN-SPINDLE APPARATUS INCLUDING HYDROSTATIC BEARING APPARATUS, AND METHOD FOR MANUFACTURING HYDROSTATIC BEARING APPARATUS
    Publication number: 20160215818
    Abstract: A hydrostatic bearing apparatus includes a bearing metal having a hydrostatic portion that allows a grinding wheel shaft to be rotatably supported. The hydrostatic portion has a bearing clearance, a bearing surface portion, a plurality of pockets, and partition plates. Clearances are each formed between the corresponding partition plate and an edge of the corresponding pocket in a rotating direction of the grinding wheel shaft. The clearances are formed in the pocket at upstream and downstream ends in the rotating direction. The bearing clearance has a first bearing clearance and a second bearing clearance. The second bearing clearance is larger than the first bearing clearance.
    Type: Application
    Filed: January 20, 2016
    Publication date: July 28, 2016
    Applicant: JTEKT Corporation
    Inventor: Hiroki Yamato
  • ROLLING BEARING
    Publication number: 20160215822
    Abstract: A rolling bearing includes a resin cage. The resin cage includes a pair of split members split in two halves in an axial direction. Each of the split members has pocket portions and coupling portions alternately arranged in a circumferential direction. On a first coupling portion of the coupling portions coupled together, an engagement pawl is formed which protrudes from a coupling surface in the axial direction. On a second coupling portion, an engagement groove is formed which is recessed in the axial direction with respect to the coupling surface and into which the engagement pawl is inserted. The engagement pawl has a base portion and a pawl portion engaging with the second coupling portion. An insertion hole is formed in the first coupling portion so as to pass through the first coupling portion in the axial direction such that a mold is inserted into the insertion hole.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 28, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Yuu Yasuda
  • GRINDING WHEEL AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20160214233
    Abstract: A grinding wheel includes: a plurality of abrasive grains arranged so as not to contact with one another; interval adjustment materials interposed between the abrasive grains, arranged in contact with the abrasive grains, and having a grain size that allows a distance between the abrasive grains to be equal to a minimum separation distance; a binder that binds each of the abrasive grains to the interval adjustment materials; and pores formed between the abrasive grains.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 28, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Tomoyuki KASUGA, Daichi KANDA
  • Steering System
    Publication number: 20160214638
    Abstract: An outer jacket externally fitted over an inner jacket so as to be slidable in an axial direction relative to the inner jacket has a slit extending straight from an opening formed at a jacket end. A recessed portion is formed at an inner edge of the slit such that a slit width at an inside diameter portion of the outer jacket is larger than a slit width at an outside diameter portion of the outer jacket. An amount of recess of the recessed portion in a circumferential direction of the outer jacket continuously decreases from the opening end to an area end.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 28, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Ryota OKANO, Masayoshi SAKUDA
  • Electric power steering system
    Patent number: 9399485
    Abstract: There is provided an electric power steering system that makes it possible to reduce an uncomfortable feeling given to a driver even when current feedback control is executed in a state where a detected steering torque value is held. The electric power steering system includes a torque sensor that outputs a detection signal corresponding to a steering torque; and a controller that controls driving of a motor. The controller computes a detected steering torque value based on the detection signal from the torque sensor, and executes current feedback control for causing an actual current value of the motor to follow a current command value based on the detected steering torque value. When the detected steering torque value is held, the controller makes a feedback gain of the current feedback control smaller than a feedback gain that is used when the detected steering torque value is not held.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 26, 2016
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Coolant system
    Patent number: 9393571
    Abstract: In a coolant system, the interior of a reservoir frame storing the coolant discharged from a machine tool is partitioned by a partition member into an outer peripheral coolant tub and a central coolant tub. The partition member is formed with a silt that extends in the depth direction to make the outer peripheral coolant tub communicate with the central coolant tub. A suction port of a pump that feeds the coolant in the central coolant tub to a filtering device is arranged in the central coolant tub. The coolant discharged from the machine tool is supplied to the central coolant tub without passing through the outer peripheral coolant tub. At least a part of the coolant filtered by the filtering device is supplied to the outer peripheral coolant tub without passing through the central coolant tub.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: July 19, 2016
    Assignees: JTEKT Corporation, CNK CO., LTD.
    Inventors: Nobumitsu Hori, Tetsuaki Wada, Tetsuya Matsumoto, Hiroto Kamei, Shigeyuki Kato
  • Control device and motor unit including the control device
    Patent number: 9398724
    Abstract: A control device of a motor unit includes a housing, and a circuit board that is housed in the housing. The circuit board includes a first substrate portion which is fixed to a side wall and in which heat dissipation components are fitted onto a first main surface, a second substrate portion in which a second main surface faces the first main surface of the first substrate portion, and heating elements are fitted onto the second main surface, and a first connecting portion that connects an end portion of the first substrate portion with an end portion of the second substrate portion. The heating elements and the heat dissipation components face each other.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: July 19, 2016
    Assignee: JTEKT CORPORATION
    Inventor: Naoki Tani
  • On-vehicle detector
    Patent number: 9395255
    Abstract: An on-vehicle detector includes a torque detecting portion for magnetically detecting a torque transmitted to a rotating shaft rotated by steering operation, and a rotation detecting portion for magnetically detecting a rotation of the rotating shaft. The rotation detecting portion includes a magnet with a pair of magnetic poles and a magnetic detection element, the magnet being disposed on a side of the rotating shaft so as to rotate simultaneously with the rotating shaft and the magnetic detection element being disposed on a side of the rotating shaft to detect a change in magnetic flux density caused by the magnet approaching or moving away in accordance with the rotation of the rotating shaft. The magnet is disposed such that the pair of magnetic poles is aligned along a circumferential direction of the rotating shaft.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: July 19, 2016
    Assignees: HITACHI METALS, LTD., JTEKT CORPORATION
    Inventors: Yuta Kataoka, Kensaku Hotta
  • Speed reduction mechanism, and motor torque transmission device including the speed reduction mechanism
    Patent number: 9397533
    Abstract: In a reduction-transmission mechanism, an input member is arranged at such a position that a size obtained by adding a fitting clearance formed between a ball bearing and an outer periphery of an eccentric portion, a fitting clearance formed between the ball bearing and an inner periphery of the input member, which defines a center hole, and a radial internal clearance of the ball bearing is smaller than a size obtained by adding a fitting clearance formed between an outer periphery of each of a plurality of output members and a corresponding one of needle roller bearings, a fitting clearance formed between each of the needle roller bearings and an inner periphery of the input member, which defines a corresponding one of a plurality of pin insertion holes, and a radial internal clearance of each of the needle roller bearings.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: July 19, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Takuno, Kunihiko Suzuki, Tomoyoshi Takai, Keita Nomura, Motoyasu Yamamori, Tsune Kobayashi, Tohru Onozaki, Masaharu Tagami
  • Transmission torque estimation unit
    Patent number: 9395254
    Abstract: A transmission torque estimation unit estimates a torque transmittable between an outer rotary member and an inner rotary member with respect to a control signal based on: a first model obtained by modeling an equation of motion of the outer rotary member in a rotation direction; a second model obtained by modeling an equation of motion, in the rotation direction, of a support cam member and an inner pilot clutch disc as one unit; a third model obtained by modeling an equation of motion of the outer main clutch discs in the rotation direction; a fourth model obtained by modeling an equation of motion of the inner rotary member in the rotation direction; and a fifth model containing a viscoelastic model and obtained by modeling an equation of motion, in an axial direction, of the inner main clutch disc and the movable cam member as one unit.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: July 19, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Aris Maroonian, Tsutomu Tamura, Robert Fuchs
  • SLIDING CONSTANT-VELOCITY JOINT
    Publication number: 20160201731
    Abstract: A constant-velocity joint 1 includes an outer ring with three raceway grooves formed therein, a tripod member having three tripod shaft portions, and roller units each having a cylindrical inner roller externally fitted over the corresponding tripod shaft portion and an outer roller. The outer roller has an annular surface facing a ceiling surface of a raceway groove. The ceiling surface includes first and second contact portions and that come into contact with an outer edge of the annular surface when the roller unit is tilted. When an outside diameter of the annular surface is represented as a roller end surface diameter A, a width of the outer roller in an axial direction is represented as a roller width B, and an interval between the first and second contact portions is represented as a contact portion interval H, a relational expression (A+B)/H?2.5 is satisfied.
    Type: Application
    Filed: January 4, 2016
    Publication date: July 14, 2016
    Applicant: JTEKT Corporation
    Inventor: Keishi KOBATA
  • JOINT STRUCTURE AND WIND POWER GENERATION DEVICE
    Publication number: 20160201649
    Abstract: A joint structure includes a clutch unit interposed between a shaft joint and a shaft body which is one of an output shaft of a speed increaser and an input shaft of a power generator. The clutch unit includes: a shaft coupling portion rotating integrally with the shaft body; a joint coupling portion rotating integrally with the shaft joint; and a one-way clutch provided between the shaft coupling portion and the joint coupling portion. The one-way clutch makes a connection integrally rotatably between the shaft coupling portion and the joint coupling portion in a state in which a rotation speed of the output shaft is higher than that of the input shaft, and releases the connection between the shaft coupling portion and the joint coupling portion in a state in which the rotation speed of the output shaft is lower than that of the input shaft.
    Type: Application
    Filed: August 28, 2014
    Publication date: July 14, 2016
    Applicant: JTEKT CORPORATION
    Inventor: Hideki FUJIWARA
  • MONITORING DEVICE FOR PROGRAMMABLE CONTROLLER
    Publication number: 20160202683
    Abstract: A monitoring device for a programmable controller includes: a display portion configured to display, on a display, a step that is being executed by the programmable controller among a plurality of steps in such a manner that the step can be distinguished from the other steps; a receiving portion configured to receive selection of a step serving as an initial point of reactivation in a case where a facility stops during a continuous operation by the programmable controller; and a change instruction generation portion configured to generate an instruction to the programmable controller so as to cause the programmable controller to restart execution of control processes from the step received by the receiving portion at the time of the reactivation.
    Type: Application
    Filed: January 8, 2016
    Publication date: July 14, 2016
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro SHIMIZU, Terukazu SENDA, Masanori MURAMATSU, Kouji HAMAKAWA, Kenzou MIMA, Kouji YAMASHIRO
  • OPERATION PROGRAM EDITING DEVICE AND METHOD FOR EDITING OPERATION PROGRAM
    Publication number: 20160202685
    Abstract: An operation program editing device includes a program editing portion configured to edit an operation program executable by a programmable controller that controls a facility, and the program editing portion includes a bypass circuit generation unit that generates a bypass circuit including a bypass path for skipping execution of some of the plurality of steps at a time of reactivation of the facility, a first selection receiving unit that receives selection of a last step, from among the plurality of steps, within a range where the execution is skipped by the bypass circuit, and a second selection receiving unit that receives selection of a first step, from among the plurality of steps, within the range where the execution is skipped by the bypass circuit.
    Type: Application
    Filed: January 8, 2016
    Publication date: July 14, 2016
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Shimizu, Terukazu Senda, Masanori Muramatsu, Kouji Hamakawa, Kenzou Mima, Kouji Yamashiro
  • Vehicle control apparatus and vehicle control method
    Patent number: 9387855
    Abstract: A vehicle control apparatus executes automated cruise control under which a steering apparatus is controlled to make a vehicle perform automated cruise. The vehicle control apparatus sets a curvature radius difference threshold used in a process for determining whether to start automated cruise control, based on a transverse deviation of the vehicle. The vehicle control apparatus does not start the automated cruise control when the absolute value of a curvature radius difference is larger than the curvature radius difference threshold. The curvature radius difference is a difference between a travelling path curvature radius and a lane curvature radius, the travelling path curvature radius being a curvature radius of a travelling path of the vehicle and the lane curvature radius being a curvature radius of a lane in which the vehicle is travelling.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: July 12, 2016
    Assignee: JTEKT CORPORATION
    Inventor: Atsushi Ishihara
  • Waterproof structure for electronic unit
    Patent number: 9392710
    Abstract: A waterproof structure for an electronic unit includes a sub-case that defines an accommodating portion that accommodates a first terminal, and has a cable guiding hole that communicates with the accommodating portion. A potting resin filled in the accommodating portion is also filled in a space between a cable and the cable guiding hole. The cable includes a first sheath that covers a conductor and is made of a first resin material, and a second sheath that covers the first sheath. The second sheath and the potting resin are made of a second resin material that is different from the first resin material.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: July 12, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Toshio Tamai, Norio Nakatani, Takahiro Sanada, Kensaku Hotta
  • Care support apparatus
    Patent number: 9387145
    Abstract: A care support apparatus includes a lateral pair of leg links held by a main body. The leg links include first links provided with first wheels at respective one ends of the first links, and second links provided with second wheels at respective one ends of the second links and rotatably coupled to the first links. The second links are rotated to allow the first wheels to approach or leave the second wheels, respectively, to change the height of a main body from a ground surface to support a care receiver.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 12, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Hiromichi Ohta, Manabu Kanaya
  • Thrust ball bearing cage and thrust ball bearing
    Patent number: 9388856
    Abstract: An end in an axial direction of a cage includes a first end face located so as to surround a pocket, a plurality of claw-shaped protrusions that protrude from a periphery of the pocket in a first end face outward in an axial direction and toward a center of the pocket and extend along the periphery at intervals, and a second end face that is connected to an end of the first end face, which is located on the opposite side of the first end face from the pocket side, via a step and is located further outward in the axial direction than the first end face. A recess is defined by the claw-shaped protrusions, the first end face, and the step.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: July 12, 2016
    Assignee: JTEKT CORPORATION
    Inventor: Yasuhiro Sakamoto