Patents Assigned to JTEKT Corporation
  • Operation program editing device and method for editing operation program
    Patent number: 10416641
    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: Grant
    Filed: January 8, 2016
    Date of Patent: September 17, 2019
    Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Shimizu, Terukazu Senda, Masanori Muramatsu, Kouji Hamakawa, Kenzou Mima, Kouji Yamashiro
  • SHAPING METHOD USING ADDITIVELY SHAPING DEVICE AND ADDITIVELY SHAPING DEVICE
    Publication number: 20190275614
    Abstract: A shaping method using an additively shaping device is a shaping method of additively shaping a shaped article by melting metal powder through irradiation of a shaping optical beam and then solidifying the melted metal powder. The shaping method includes: a first step of preparing, in an irradiation area on a baseplate, a first layer of the shaped article having on an upper surface of the first layer a trough portion that is formed in a recessed manner along a predetermined axis; a second step of feeding the metal powder to the trough portion; and a third step of, after the process of the second step, applying the shaping optical beam to the metal powder fed to the trough portion to melt the metal powder.
    Type: Application
    Filed: March 6, 2019
    Publication date: September 12, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Yoshinori IMOTO, Koichi SHIIBA
  • PRODUCTION MANAGEMENT SYSTEM
    Publication number: 20190278259
    Abstract: A production management system includes a plurality of production facilities, a first operation instruction provider, and a management device. The first operation instruction provider gives a first operator an instruction to deliver workpiece into and out of a predetermined one of the production facilities in accordance with a production plan and operating statuses of the production facilities and acquires an operation status of each of the first operators. The management device transmits, to the production facility into which the workpiece has been delivered, process data for activation of the production facility in accordance with the status of delivery of the workpiece into and out of each of the production facilities.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Toshiyuki Tsuzuki, Tatsuo Oshiumi
  • Cage for taper roller bearing and taper roller bearing
    Patent number: 10408266
    Abstract: A cage made of a resin includes: a small-diameter annular portion on one side in an axial direction; a large-diameter annular portion on the other side in the axial direction; and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion to each other. Spaces which are formed between the large-diameter annular portion and the small-diameter annular portion and between the column portions adjacent to each other in the circumferential direction are pockets which hold the taper rollers. A surface of the entire cage including the small-diameter annular portion, the large-diameter annular portion, and all of the column portions is configured by aggregating a surface viewed from the one axial side and a surface viewed from the other axial side.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: September 10, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata, Yuki Shishihara
  • Method for manufacturing universal joint
    Patent number: 10399188
    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: Grant
    Filed: June 1, 2016
    Date of Patent: September 3, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Takeshi Koyama, Masanori Kobayashi
  • Electric pump unit
    Patent number: 10400767
    Abstract: An electric pump unit is provided that ensures capability for lubricating a plain bearing and in which a lubricating oil passage is formed with a simple structure. This pump unit includes: a pump in which a rotor placed in a pump chamber of a pump housing rotates; and an electric motor having a motor shaft coupled to the rotor. The motor shaft is rotatably supported by a cylindrical plain bearing disposed in the pump housing. An oil seal is provided on the opposite side to the pump chamber with the plain bearing between so as to be located between the pump housing and the motor shaft. Oil supply grooves are formed in an inner peripheral surface of the plain bearing so as to extend through the plain bearing in an axial direction.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: September 3, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Yasukata Miyagawa, Noriyuki Okamoto
  • Optical tweezers device
    Patent number: 10403412
    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: Grant
    Filed: October 21, 2016
    Date of Patent: September 3, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Kota Nanri, Toshiyuki Saito, Kensuke Suzuki
  • STEERING CONTROL DEVICE
    Publication number: 20190263444
    Abstract: A steering control device capable of suitably handling a temporary drop in a supply voltage of a vehicle is provided. An ECU includes a microcomputer, a pre-driver, and an inverter. The microcomputer generates a command signal for the pre-driver. Upon being initialized by the microcomputer, the pre-driver becomes operable to generate a drive signal for the inverter based on the command signal. The inverter converts direct current power supplied from a battery into alternating current power for a motor by operating based on the drive signal. When a drop in a voltage of the battery is detected, the pre-driver transmits an abnormal-condition detection signal to the microcomputer and stops operating by resetting a state of the pre-driver to an initial state where the pre-driver is not initialized yet. When the abnormal-condition detection signal is received, the microcomputer re-initializes the pre-driver.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Masashi YOSHIKAWA
  • CUTTING METHOD AND CUTTING TOOL
    Publication number: 20190263014
    Abstract: A cutting method for cutting a workpiece by using a cutting tool having a ring-shaped cutting edge, the workpiece containing alumina, the cutting method includes: cutting the workpiece with the cutting edge being coated with alumina contained in the workpiece, wherein an end surface of the cutting tool is set as a flank, and an outer circumferential surface of the cutting tool is set as a rake face.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Hiroshi WATANABE, Takayuki AZUMA, Yusuke KITO
  • WALKING ASSIST DEVICE
    Publication number: 20190262217
    Abstract: A walking assist device has a frame, a plurality of wheels, drive units, a battery, and a drive control unit that controls the drive units. The walking assist device also has: a pair of right and left movable handles that are grasped by a user and movable back and forth with respect to the frame in accordance with arm swing performed during walk of the user; handle guide units provided on the frame to guide the movable handles in a movable range that matches the arm swing performed during walk of the user; and a grasp portion state detection unit that detects the state of the movable handles. The drive control unit controls the travel speed of the walking assist device by controlling the drive units on the basis of the state of the movable handles which is detected using the grasp portion state detection unit.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Manabu KANAYA, Yoshiyuki SHIBATA, Shinji TAKEUCHI, Genki MURATA
  • WALKING ASSIST DEVICE
    Publication number: 20190262215
    Abstract: A walking assist device includes: a pair of right and left handles that are movable back and forth with respect to a frame in accordance with arm swing performed during walk of a user; rails on which the handles are provided and which limit movement of the handles in a movable range in accordance with arm swing performed during the walk of the user; a handle information acquisition unit that acquires information related to movement of the handles; and a control unit that controls a drive unit in accordance with the information from the handle information acquisition unit.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Fumitaka ACHIWA, Yoshiyuki SHIBATA, Kouji NAGUMO, Kimihiro ONISHI, Tomomi NISHIDA
  • WALKING ASSIST DEVICE
    Publication number: 20190262216
    Abstract: A walking assist device has a frame, fixed handles, rails provided with movable handles, front wheels, rear wheels and that serve as drive wheels, drive units, a battery, and a drive control unit, and travels forward or rearward together with a user that walks while grasping the fixed handles or the movable handles. The walking assist device has an operation mode switching unit that switches between a training mode, in which a load is applied to operation of the body of the user performed as the user walks, and an assist mode in which a load on operation of the body of the user performed as the user walks is alleviated.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Manabu KANAYA, Yoshiyuki SHIBATA, Shinji TAKEUCHI
  • Cutting device and cutting method
    Patent number: 10391560
    Abstract: The cutting device includes a rotating portion for rotating the cutting tool in a rotation axis line of the cutting tool and a traveling means for making the cutting tool travel relative to a workpiece. The rotating means and the traveling means rotates the outer peripheral surface of the cutting tool and makes the cutting tool travel, having the outer peripheral surface function as the rake surface, so as to perform cutting machining.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: August 27, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Takayuki Azuma, Yoshihiko Yamada, Kenji Hamada, Masahiro Kiji, Hiroshi Watanabe
  • Vehicle controller
    Patent number: 10392019
    Abstract: An ECU includes a deviation calculating circuit an assist control circuit, an automatic steering control circuit including an intervention determination switching circuit, an adder, a current command value calculating circuit The intervention determination switching circuit includes a count amount calculating circuit, an adder, an immediately-preceding count amount output circuit, a switching determination circuit, and an output switching circuit. The count amount calculating circuit calculates a count amount having a positive value or a negative value based on a steering torque absolute value calculated by an absolute value switching circuit. The adder calculates a total count amount that is the total sum of a presently calculated count amount and an immediately-preceding count amount calculated in an immediately-preceding calculation cycle.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: August 27, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Shingo Maeda, Terutaka Tamaizumi, Jun Hasegawa, Masayuki Kita, Gempei Nakasone, Hiromasa Tamaki
  • Constant velocity joint
    Patent number: 10393186
    Abstract: A constant velocity joint includes: an outer joint member having a raceway groove; an inner joint member having a leg shaft; a roller that is able to roll on the raceway groove; and a needle bearing that supports an inner periphery of the roller such that the inner periphery of the roller is able to rotate with respect to the leg shaft. The leg shaft includes: a roll portion that supports the needle bearing; a contact portion that is able to contact an end face of the needle bearing, the end face facing a first side in the direction of a central axis of the needle bearing; and a recess portion formed between the roll portion and the contact portion, in a position where the recess portion is recessed from a space in which the needle bearing is disposed.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: August 27, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Keishi Kobata
  • Bearing ring for roller bearing, manufacturing method of bearing ring for roller bearing, and needle roller bearing
    Patent number: 10393180
    Abstract: A raceway of a roller bearing includes a first raceway whose raceway surface is under a relatively high compressive residual stress, and a second raceway whose raceway surface is under a compressive residual stress lower than the compressive residual stress applied to the raceway surface of the first raceway. The raceway surface of the second raceway has a Vickers hardness of 700 HV or more but less than 800 HV. The raceway surface of the first raceway includes a portion that is harder than the raceway surface of the second raceway and that is to be in contact with at least one of axial ends of a rolling contact surface of a roller. A rib includes a rib surface having a Vickers hardness of 450 HV or more but less than 550 HV.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: August 27, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Kensuke Suzuki, Wataru Yoshida, Nicolas Vincent Barbi, Tsuyoshi Mikami
  • ONE-WAY CLUTCH
    Publication number: 20190257374
    Abstract: A one-way clutch includes multiple sprags located between an outer ring member and an inner ring member, a cage that holds the sprags such that the sprags are circumferentially spaced from each other, and a spring disposed along the cage and in contact with the sprags. The cage includes a tubular body and an annular flange. The body has multiple pockets that hold the sprags. The flange extends from an axial end of the body toward the outer ring member. A clearance is formed between the outer ring member and the flange along their entire circumference.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 22, 2019
    Applicant: JTEKT CORPORATION
    Inventor: Hajime WATANABE
  • MOTOR CONTROLLER
    Publication number: 20190260317
    Abstract: A motor controller includes a motor drive circuit, a noise cancellation circuit, and a control unit. The motor drive circuit supplies electric power to an electric motor. The noise cancellation circuit includes an RLC circuit, a switch element, and a pull-down resistor. One end of the RLC circuit is electrically connected to a positive terminal of a power supply via the switch element, and the other end of the RLC circuit is electrically connected to a frame ground. A connection point between the RLC circuit and the switch element is electrically connected to a negative terminal of the power supply via the pull-down resistor. The control unit turns ON the switch element for a predetermined time at falling timings of phase voltages output from the motor drive circuit.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 22, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Koichiro MATSUHISA, Hiroshi SUMASU
  • Steering controller
    Patent number: 10384711
    Abstract: Provided is a steering controller configured to suppress deterioration of the operability of a steering wheel for steering steered wheels even when a driving voltage for a steering system has been decreased. When a clutch is in a disengaged state and steered wheels are steered by a steered-operation actuator while a reaction force is applied to steering wheel by a reaction-force actuator, if a driving voltage for the steered-operation actuator is decreased, a CPU opens relays and stops generation of torque by the steered-operation actuator. Meanwhile, a CPU engages the clutch and steers the steered wheels through cooperation between a steering torque input into the steering wheel and an assist torque generated by a reaction-force motor.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: August 20, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Frequency detector for reciprocating moving body, and swinging joint device
    Patent number: 10386207
    Abstract: A frequency detector includes an oscillation related information output portion to which moving body position related information and a correction parameter are input, and which outputs a frequency adjustment parameter and estimated moving body position related information; a frequency estimating portion to which the frequency adjustment parameter is input, and which outputs an estimated frequency; and an adjusting portion to which the moving body position related information, the estimated moving body position related information, and the estimated frequency are input, and which outputs the correction parameter.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: August 20, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Yoshitaka Yoshimi, Hiromichi Ohta