Patents Assigned to JTEKT
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Publication number: 20200366230Abstract: A motor control device includes a table in which a motor torque generated from a reluctance torque utilizing motor is stored with respect to a combination of an armature current command value and a current phase angle command value at which the motor torque is maximized for the armature current command value, a first setting portion that sets a motor torque command value that is a command value of a motor torque to be generated by the reluctance torque utilizing motor, and a second setting portion that sets, based on the table, an armature current command value and a current phase angle command value for making a motor torque that is in accordance with the motor torque command value set by the first setting portion be generated from the reluctance torque utilizing motor.Type: ApplicationFiled: July 9, 2018Publication date: November 19, 2020Applicant: JTEKT CORPORATIONInventor: Yuta IWAI
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Patent number: 10836598Abstract: To form a web conveying path that bends and conveys a web, a web conveying device has: a plurality of foil supporting members that are disposed at prescribed intervals in a conveying direction of the web and that support a surface of the web that is being conveyed; a foil extending member stretched between the foil supporting members, which pulls an end of the web downstream in the conveying direction of the web such that the web extends from a starting point to an end point of the web conveying path that is formed by the foil supporting members; and a moving mechanism that moves the foil extending member from the starting point to the end point of the web conveying path.Type: GrantFiled: August 1, 2018Date of Patent: November 17, 2020Assignee: JTEKT CORPORATIONInventor: Tsubasa Matsuda
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Patent number: 10838188Abstract: 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: GrantFiled: October 21, 2016Date of Patent: November 17, 2020Assignee: JTEKT CORPORATIONInventors: Kota Nanri, Toshiyuki Saito, Kensuke Suzuki
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Publication number: 20200355223Abstract: A cage and roller assembly includes a plurality of rollers to be brought into rolling contact with a raceway surface provided on the outer periphery of a shaft, and an annular cage that retains the rollers. Lubricating oil is supplied through an oil supply hole that is provided inside the shaft and is open at the raceway surface. The cage includes a pair of annular portions, and a plurality of cage bars that couple the annular portions together and are arranged with intervals in a circumferential direction. The rollers are housed in pockets each formed between the pair of annular portions and between the cage bars that are adjacent to each other in the circumferential direction. The cage has an inner recessed groove that is provided on a radially inner surface of the cage bar and extends through the annular portions in an axial direction.Type: ApplicationFiled: July 28, 2020Publication date: November 12, 2020Applicant: JTEKT CORPORATIONInventors: Junji MURATA, Shigeo KAMAMOTO, Yuki SHISHIHARA
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Publication number: 20200356520Abstract: A programmable controller includes a plurality of modules arranged along a predetermined arrangement direction, and the plurality of modules includes a master station module and slave station modules. The programmable controller includes a main line configured to provide communication between the master station module and the slave station modules, and sub-lines configured to provide communication between two adjacent modules. The programmable controller sets station numbers of the slave station modules by communication via the sub-lines, and then performs communication via the main line using the set station numbers.Type: ApplicationFiled: May 4, 2020Publication date: November 12, 2020Applicant: JTEKT CORPORATIONInventor: Takanori ITO
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Publication number: 20200355408Abstract: A thermoacoustic device includes a loop tube in which a working gas is sealed; a stack in which a temperature gradient is generated in a tube axis direction of the loop tube, the stack being provided in the loop tube; and a diaphragm structure including a diaphragm provided in the loop tube and an operating unit, the diaphragm having a surface extending in a direction intersecting the tube axis direction and being configured to vibrate with a component of vibration in the tube axis direction, and the operation unit being configured to apply a physical quantity that is required, to the diaphragm to change a rigidity of the diaphragm in the tube axis direction.Type: ApplicationFiled: April 28, 2020Publication date: November 12, 2020Applicants: JTEKT CORPORATION, University Public Corporation OsakaInventors: Tatsuma KOUCHI, Tomoyuki TAKEI, Kunio OHARA, Hiroki TANAKA, Osamu ISHIKAWA
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Patent number: 10831361Abstract: To provide a control panel for machine tools that improves operability and enables even an unskilled person to easily grasp a procedure for moving a screen to a target screen. A plurality of screen data are classified into a plurality of groups and classified into main screen data and sub-screen data associated with the main screen data in each of the groups. A control section displays the main screen data and displays the sub-screen data on a display section according to a type of an input to a plurality of main screen corresponding buttons.Type: GrantFiled: March 15, 2017Date of Patent: November 10, 2020Assignee: JTEKT CorporationInventors: Kazuhiro Tsujimura, Tomokazu Takayama, Takahito Umeki, Masanori Ando, Hiroyuki Tsusaka
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Patent number: 10830282Abstract: In a sliding shaft, an outer circumferential surface of a male shaft is coated with a resin coating layer formed by a fluidized bed powder coating method using a powder coating material containing a base resin and at least either a carbon black or a metal oxide as an antistatic agent. A steering device includes this sliding shaft as an intermediate shaft transmitting steering force.Type: GrantFiled: March 26, 2018Date of Patent: November 10, 2020Assignee: JTEKT CORPORATIONInventor: Kazunori Miyake
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Patent number: 10830290Abstract: 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: GrantFiled: February 15, 2019Date of Patent: November 10, 2020Assignee: JTEKT CORPORATIONInventor: Hajime Watanabe
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Publication number: 20200347884Abstract: A seal assembly device is configured to attach an annular seal by press-fitting to an axial end portion of a first raceway member of a wheel bearing device. The seal assembly device includes: a columnar guide member including a contact surface configured to contact a plurality of rolling elements provided along a raceway surface formed on the first raceway member from a side opposite to the raceway surface, the contact surface being continuous in a circumferential direction; a pressing member configured to move in an axial direction along the guide member toward the axial end portion so as to press the seal in the axial direction and to press-fit the seal into the axial end portion; and a reference member configured to restrict a movement stroke of the pressing member with respect to the guide member in the axial direction.Type: ApplicationFiled: January 31, 2019Publication date: November 5, 2020Applicant: JTEKT CORPORATIONInventors: Kenichi MORITA, Daisuke YAMASAKI, Mitsuru SAWANO, Takafumi UEMOTO
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Patent number: 10826421Abstract: A microcomputer includes a current command value setting unit configured to set a two-phase current command value in a two-phase rotating coordinate system for each of PWM cycles in a current control cycle, and an open-loop control unit configured to calculate a two-phase voltage command value for each of the PWM cycles, according to a motor voltage equation, based on the two-phase current command value for each of the PWM cycles that is set by the current command value setting unit and a rotation speed of an electric motor. The two-phase voltage command value is a command value of voltage that is to be applied to the electric motor.Type: GrantFiled: September 13, 2017Date of Patent: November 3, 2020Assignee: JTEKT CORPORATIONInventor: Hiroshi Sumasu
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Publication number: 20200339187Abstract: A turning control system includes an electronic control unit. The electronic control unit is configured to perform: a steering operation amount calculating process of calculating a steering operation amount; an angle command value calculating process of calculating an angle command value; an angle operation amount calculating process of calculating an angle operation amount; an operation process of operating a drive circuit of an electric motor; an adjustment process of adjusting a magnitude of a value obtained by subtracting the angle operation amount which is reflected in the operation process from the angle operation amount; and a correction process of correcting a magnitude of an input when the angle command value is calculated in the angle command value calculating process to be less when the magnitude of the subtracted value is great than when the magnitude of the subtracted value is small.Type: ApplicationFiled: April 16, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventor: Terutaka TAMAIZUMI
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Publication number: 20200339186Abstract: A turning system includes a steering wheel, a turning actuator that has an electric motor incorporated thereinto and turns turning wheels, and a control device. The control device is configured to perform: a steering operation amount calculating process of calculating a steering operation amount; an angle command value calculating process of calculating an angle command value; an angle operation amount calculating process of calculating an angle operation amount; an operation process of operating a drive circuit of the electric motor; and a correction process of correcting a parameter upstream from the angle operation amount calculating process such that a drag force resisting an operation of the steering wheel for increasing magnitude of the turning angle is applied when the magnitude of the turning angle is equal to or greater than a turning angle threshold value.Type: ApplicationFiled: April 15, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventor: Terutaka TAMAIZUMI
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Publication number: 20200340561Abstract: A ball screw device includes a screw shaft having a first screw groove formed on an outer circumference thereof, a ball screw nut having a second screw groove formed on an inner circumference thereof, and a plurality of balls disposed in a spiral ball raceway wherein the first screw groove and the second screw groove face each other. A circulation member is attached to an attachment hole radially penetrating the ball screw nut and a circulation path is formed, the circulation path allowing endless circulation of each of the balls rolling in the ball raceway by short-circuiting between two points of the ball raceway.Type: ApplicationFiled: April 2, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventor: Tetsuya KANEKO
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Publication number: 20200340532Abstract: A rolling bearing includes a first raceway surface; a second raceway surface; and a plurality of rolling elements rotatably arranged between the first raceway surface and the second raceway surface. Multiple recesses are provided on at least one surface among the first raceway surface, the second raceway surface, and rolling surfaces of the plurality of the rolling elements. An area ratio of openings of the recesses to the at least one surface is in a range of 5% to 37%. An equivalent circle diameter of the opening of each of the recesses is in a range of 1 ?m to 27 ?m. A depth of each of the recesses in a direction normal to the at least one surface is in a range of 3 ?m to 10 ?m. A surface waviness of the at least one surface excluding the recesses is smaller than or equal to 0.2 ?m.Type: ApplicationFiled: April 23, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventors: Junji MURATA, Shigeo KAMAMOTO, Yuki SHISHIHARA
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Publication number: 20200339179Abstract: A steering device for steering a vehicle includes a movable member, a holding member, an impact absorbing member, a movement driving unit, and a controller. The controller is configured to perform first control and second control by which the movement driving unit is controlled. The first control is a control for moving the movable member along an axial direction of a shaft member within such a range that a front end of at least one of the shaft member and the movable member is located rearward of a space for movement in the front-rear direction of the vehicle. The second control is a control for moving the movable member along the axial direction within such a range that the front end portion is located inside the space for movement.Type: ApplicationFiled: April 21, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventors: Yasuyuki NOZAWA, Norihiro OCHI, Ryoichi TOKIOKA, Takeshi WATANABE
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Publication number: 20200339184Abstract: This steering control device is provided with a microcomputer. The microcomputer includes: a basic assist component calculation unit for calculating a basic assist component; an angle command value calculation unit for calculating an angle command value; an angle feedback control unit that calculates an assist command value via angle feedback control in which a pinion angle is made to follow the angle command value; and a control signal generation unit that generates a motor control signal on the basis of the assist command value. The basic assist component calculation unit includes: a torque command value calculation unit for calculating a torque command value that is a target value for steering torque to be input by a driver; and a torque feedback control unit that calculates the basic assist component via torque feedback control in which the steering torque is made to follow the torque command value.Type: ApplicationFiled: October 23, 2018Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventors: Shigeto MATSUO, Terutaka TAMAIZUMI, Akihiko NISHIMURA
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Publication number: 20200339188Abstract: A turning control system includes a controller. The controller is configured to perform a decrease process of decreasing a magnitude of an angle operation amount which is reflected in an operation process with respect to the magnitude of the angle operation amount calculated in an angle operation amount calculating process when a vehicle speed is equal to or lower than a prescribed speed and a magnitude of an input torque of a steering wheel is equal to or less than a prescribed value. The controller is configured to perform a correction process of correcting an input when the decrease process is performed such that a magnitude of the input decreases when an angle command value calculating process calculates an angle command value.Type: ApplicationFiled: April 23, 2020Publication date: October 29, 2020Applicant: JTEKT CORPORATIONInventor: Terutaka TAMAIZUMI
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Patent number: 10819141Abstract: A power steering system includes: a main power source; an auxiliary power source connected to the main power source via a power source switch; a charge circuit connected to the main power source via the power source switch and configured to charge the auxiliary power source on the basis of the main power source; a switching circuit that switches a power supply mode; and a unit that turns off the power source switch after the auxiliary power source is charged by the charge circuit until the voltage of the auxiliary power source becomes equal to or more than a predetermined voltage in the case where the voltage of the auxiliary power source is less than the predetermined voltage when a key switch for a vehicle is turned off.Type: GrantFiled: February 8, 2019Date of Patent: October 27, 2020Assignee: JTEKT CORPORATIONInventor: Toyoki Sugiyama
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Publication number: 20200332870Abstract: A ball screw device includes a screw shaft body, a ball nut, a housing, a bearing, an annular first biasing member and an annular second biasing member, and an annular first holding member and an annular second holding member. The housing includes a cylindrical first housing and a cylindrical second housing that are coupled to each other in a surface-contact state. The first housing includes a bearing holding portion that holds the bearing slidably in the axial direction. The second housing includes a pressing portion that protrudes radially inward. At least one of the first holding member and the second holding member generates a gap between the first housing and the second housing when the bearing, the first biasing member, the second biasing member, the first holding member, and the second holding member are wrongly mounted to one another.Type: ApplicationFiled: April 15, 2020Publication date: October 22, 2020Applicant: JTEKT CORPORATIONInventor: Yusuke IINUMA
