Patents by Inventor Yutaka Uematsu

Yutaka Uematsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10879763
    Abstract: An electric actuator is provided and includes: a motor unit having a motor shaft extending in an axial direction, a speed reducer connected to one side of the motor shaft in the axial direction, an output section having an output shaft to which rotation of the motor shaft is transmitted via the speed reducer, and a housing accommodating the motor unit, the speed reducer and the output section. The motor shaft and the output shaft are disposed apart from each other in the radial direction of the motor shaft. The motor unit has a first bearing that rotatably supports the motor shaft. The housing has a housing main body formed of resin, and a metal member formed of metal and held by the housing main body. The metal member has a bearing holding section that holds the first bearing, and an output shaft support section that supports the output shaft.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: December 29, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yutaka Uematsu, Shun Kato, Ryunosuke Oikawa, Yuzo Akasaka, Kazumi Shinkai
  • Patent number: 10855140
    Abstract: An electric actuator includes: a motor part, having a motor shaft that extends in an axial direction and is rotated in both directions; a deceleration mechanism, connected to the motor shaft; a circuit board, electrically connected to the motor part; an output part, having an output shaft to which rotation of the motor shaft is transmitted through the deceleration mechanism; a sensor magnet, attached to the motor shaft; and a motor part sensor, detecting a magnetic field of the sensor magnet and detecting rotation of the motor shaft. The motor part has a rotor magnet that is fixed to the motor shaft. The rotor magnet and the sensor magnet each have multiple magnetic poles in a circumferential direction around the motor shaft. The magnetic poles of the rotor magnet and the magnetic poles of the sensor magnet are disposed to be shifted from each other in the circumferential direction.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: December 1, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Shun Kato, Yutaka Uematsu, Tadayuki Hatsuda, Yuzo Akasaka
  • Patent number: 10819184
    Abstract: An electric actuator attached to a vehicle is provided and includes: a motor unit, a speed reducer, a circuit board, an output section, and a housing that accommodates the motor unit, the speed reducer, the circuit board and the output section. The housing has a motor case that opens at one side in an axial direction, and a circuit board case attached to one side of the motor case in the axial direction to close an opening of the motor case and accommodates the circuit board. The motor case has a motor case main body that accommodates the motor unit, and multiple attaching leg sections protruding from the motor case main body and fixed to the vehicle. The attaching leg sections protrude outward from the circuit board case when seen in the axial direction.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: October 27, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yutaka Uematsu, Shun Kato, Ryunosuke Oikawa, Yuzo Akasaka, Kazumi Shinkai
  • Patent number: 10804771
    Abstract: This disclosure provides an electric actuator and a rotation control mechanism. The electric actuator includes: a motor; a speed reduction mechanism; an output part; and a rotation detection device. The output part extends in an axial direction and is disposed on one side in the axial direction with respect to a motor shaft of the motor. The rotation detection device has: a magnet that is fixed to the output part and extends in a circumferential direction of the output part; and a rotation sensor that faces the magnet in the axial direction or in a radial direction. The magnet has multiple magnetic poles disposed in the circumferential direction. At least one magnetic pole of the magnet is disposed at a predetermined angular position with respect to an angle reference position of the output part in a rotation direction.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: October 13, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yutaka Uematsu, Jaehyun Kim, Toshiaki Nakamura, Shuichi Kinjo, Hiroshi Shirai
  • Patent number: 10794465
    Abstract: There is provided an electric actuator in which a speed reduction mechanism and an output portion are disposed adjacent to each other in a radial direction in an opening portion of a housing main body, a cover member has a speed reduction mechanism cover which faces and surrounds the speed reduction mechanism, an output portion cover which faces and surrounds the output portion, and a constricted portion which connects the speed reduction mechanism cover and the output portion cover, the cover member is fixed to the housing main body by a plurality of caulking portions provided on a side wall portion, and, between two adjacent caulking portions interposing the constricted portion therebetween, one of the two caulking portions of the speed reduction mechanism cover is fixed toward a central axis of the speed reduction mechanism, and the other is fixed toward a central axis of the output portion.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: October 6, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yutaka Uematsu, Kazumi Shinkai, Shun Kato, Shuichi Kinjo, Kohei Osuga, Tadayuki Hatsuda
  • Patent number: 10763214
    Abstract: Performance of a semiconductor device is improved. The semiconductor device includes a semiconductor chip and a chip component that are electrically connected to each other via a wiring substrate. The semiconductor chip includes an input/output circuit and an electrode pad electrically connected to the input/output circuit and transmitting the signal. The chip component includes a plurality of types of passive elements and includes an equalizer circuit for correcting signal waveforms of the signal, and electrodes electrically connected to the equalizer circuit. The path length from the signal electrode of the semiconductor chip to the electrode of the chip component is 1/16 or more and 3.5/16 or less with respect to the wavelength of the signal.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: September 1, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shuuichi Kariyazaki, Kazuyuki Nakagawa, Keita Tsuchiya, Yosuke Katsura, Shinji Katayama, Norio Chujo, Masayoshi Yagyu, Yutaka Uematsu
  • Publication number: 20200260570
    Abstract: In a multilayer wiring board having through holes used in an electronic device, wiring is efficiently performed at high density while preventing crosstalk of differential signals. A wiring board includes: a plurality of pads arranged linearly at a predetermined pitch; a plurality of through holes arranged in parallel along an arrangement direction of the pads; and a wiring pattern connecting the pad to the through hole. Between the through holes connected to the pads which are connected to the ground via the wiring patterns, two through holes through which each of a pair of differential signals constituting a differential signal pair passes are provided such that a direction of a straight line connecting the two through holes is inclined to the arrangement direction of the pads.
    Type: Application
    Filed: December 13, 2017
    Publication date: August 13, 2020
    Inventors: Norio CHUJO, Yutaka UEMATSU, Masayoshi YAGYU
  • Publication number: 20200251951
    Abstract: An electric actuator includes a motor and a deceleration mechanism. The motor has a motor case having a first opening end surface. The deceleration mechanism has a deceleration mechanism case having a second opening end surface. The motor case and the deceleration mechanism case are connected via a sealing member. The first opening end surface has a first end surface body part and a first end surface protrusion part. The second opening end surface has a second end surface body part and a second end surface protrusion part. The sealing member has a body part sealing part and a protrusion part sealing part. The protrusion part sealing part has an axial-direction protrusion that faces a side surface of the motor case in the first end surface protrusion part or a side surface of the deceleration mechanism case in the second end surface protrusion part in a circumferential direction.
    Type: Application
    Filed: January 9, 2020
    Publication date: August 6, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Publication number: 20200251959
    Abstract: An electric actuator includes a motor including a rotor having a motor shaft extending along a central axis and a stator, a deceleration mechanism connected to the motor shaft, an output shaft, a bearing, and a deceleration mechanism case. The motor shaft includes an eccentric axis part with an eccentric axis as a center. The bearing is fitted on of the eccentric axis part. The deceleration mechanism includes an internal gear in a ring shape; an external gear connected to the eccentric axis part via the bearing and engaging with the internal gear; and an output flange part which transmits rotation of the external gear around the central axis to the output shaft. The deceleration mechanism case includes a plurality of gear supporting parts which support an end surface of the internal gear facing one axial-direction side and which are disposed in a circumferential direction with intervals from one another.
    Type: Application
    Filed: January 13, 2020
    Publication date: August 6, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Publication number: 20200251958
    Abstract: An electric actuator includes a motor including a rotor having a motor shaft extending along a central axis and a stator, a deceleration mechanism connected to the motor shaft, an output shaft, a first bearing, a second bearing, and a deceleration mechanism case. The first bearing is fitted on an eccentric axis part of the motor shaft. The deceleration mechanism includes an internal gear in a ring shape, an external gear connected to the eccentric axis part, and an output flange part which transmits rotation of the external gear around the central axis to the output shaft. The deceleration mechanism case includes a case body and a cup member. The cup member includes a first cylinder part to which the internal gear is fitted on the radial-direction inner side, and a second cylinder part to which the second bearing is fitted on the radial-direction inner side.
    Type: Application
    Filed: January 8, 2020
    Publication date: August 6, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Publication number: 20200251956
    Abstract: An electric actuator according to an aspect of the disclosure includes: a motor including a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction; and a deceleration mechanism which is disposed on a side of the stator in an axial direction and connected to the motor shaft. The motor shaft includes an eccentric shaft part with an eccentric axis, which is eccentric with respect to the central axis, as a center, and the eccentric shaft part is connected with the deceleration mechanism. The eccentric shaft part includes a balance concave part disposed on an end part of the eccentric shaft part in a predetermined direction which is in a radial direction from the central axis toward the eccentric axis. The balance concave part is recessed from an outer surface of the eccentric shaft part.
    Type: Application
    Filed: December 17, 2019
    Publication date: August 6, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Publication number: 20200244140
    Abstract: An electric actuator includes a motor which has a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction, a motor case for housing the motor, and a deceleration mechanism coupled to one axial side of the motor shaft. The motor case has a case cylinder portion, a lid for covering, and a plurality of screws. The case cylinder portion has a plurality of screw fixing portions. The lid has a top plate portion, an outer cylinder portion which surrounds the case cylinder portion from a radial outer side, an annular groove portion, and a seal member which seals the opening portion of the case cylinder portion. In the lid, an axial thickness of a region which overlaps the annular groove portion as viewed in the axial direction is larger than an axial thickness of the top plate portion.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 30, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Publication number: 20200244132
    Abstract: An electric actuator includes a motor which has a rotor having a motor shaft and a stator, a motor case for housing the motor, and a deceleration mechanism coupled to the motor shaft. The motor case has a case cylinder portion and a lid. The lid has a top plate portion, an outer cylinder portion, an inner cylinder portion, an annular groove portion, and an annular seal member. An axial length of the outer cylinder portion is larger than an axial length of the inner cylinder portion. An inner diameter of the annular seal member is smaller than an outer diameter of the inner cylinder portion in a state that the annular seal member is removed from the lid. The annular seal member is housed in the annular groove portion in a state of being in contact with an outer peripheral surface of the inner cylinder portion.
    Type: Application
    Filed: January 17, 2020
    Publication date: July 30, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Shuichi KINJO, Hiroshi SHIRAI, Yutaka UEMATSU
  • Patent number: 10715003
    Abstract: An electric actuator includes: a motor unit; a speed reducer; a circuit board; a busbar; and a housing. The housing has a motor case and a circuit board case attached to one side of the motor case in an axial direction. The circuit board case has a bottom wall blocking an opening of the motor case. The bottom wall has a bottom wall through-hole that penetrates through the bottom wall in the axial direction on an outer side beyond the speed reducer in the radial direction. A busbar has a busbar main body section, a coil line connecting section to which a coil line extending on one side in the axial direction from a coil is connected, and a connection terminal section. The connection terminal section extends to one side of the bottom wall in the axial direction via the bottom wall through-hole and is connected to the circuit board.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: July 14, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Yutaka Uematsu, Shun Kato, Ryunosuke Oikawa, Yuzo Akasaka, Kazumi Shinkai
  • Publication number: 20200200234
    Abstract: An electric actuator includes a motor with a motor shaft extending along a central axis, a speed reducer connected to the motor shaft, an output portion including an output shaft portion, a rotation detector to detect rotation of the output portion, a case, a first bearing to connect the motor shaft to the output portion to be rotatable with respect to each other, and a second bearing to rotatably support the output portion with respect to the case. A support tubular portion into which the second bearing is fitted is provided at a portion of an inner surface of the case on one side in the axial direction for the speed reducer. The first bearing, the output portion, the second bearing and the support tubular portion overlap each other when seen in a radial direction. At least a portion of the rotation detector faces an outward side of the support tubular portion in the radial direction.
    Type: Application
    Filed: August 22, 2018
    Publication date: June 25, 2020
    Inventors: Shuichi KINJO, Yutaka UEMATSU
  • Patent number: 10686348
    Abstract: There is provided an electric actuator including a motor, a first case having a first opening, a second case having a second opening that opens to the other side in the axial direction, a rotation sensor, and a plurality of bus bars which are electrically connected to a plurality of sensor terminals that extend from the rotation sensor and are held in the second case. The first and second cases are fixed to each other while the first opening and the second opening face each other in the axial direction, and parts connecting the plurality of bus bars and the plurality of sensor terminals are disposed at positions shifted from each other in a circumferential direction and radially outward from the rotation sensor. Among the plurality of connecting parts, at least one pair of adjacent connecting parts are disposed at positions different from each other in the radial direction.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: June 16, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Hiroshi Shirai, Toshiaki Nakamura, Yutaka Uematsu
  • Patent number: 10637332
    Abstract: An electric actuator is provided. The electric actuator includes a motor, a deceleration mechanism, case, an output part, a first rotation sensor and a holding member that holds the first rotation sensor in the case. The case includes a first recess that is recessed from an inner surface of the case to one side in a first direction and a support surface that faces the other side in the first direction. The first rotation sensor includes a sensor main body which includes a sensor chip and is accommodated in the first recess and a projection that protrudes in a second direction orthogonal to the first direction from the sensor main body. The projection is supported on the support surface from one side in the first direction. The sensor main body is disposed on the other side in the first direction away from the bottom surface of the first recess.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: April 28, 2020
    Assignee: NIDEC TOSOK CORPORATION
    Inventors: Hiroshi Shirai, Toshiaki Nakamura, Yutaka Uematsu
  • Patent number: 10630238
    Abstract: A detector circuit in which a change in a detection voltage due to temperature is suppressed is provided. The detector circuit includes a first rectification element having an anode to which an input signal is inputted. A second rectification element has a cathode connected with a cathode of the first rectification element and has an anode connected to an output terminal. A current mirror circuit for supplying a current to the first rectification element and for supplying a current-mirror current of the current to the second rectification element is included in the detector circuit.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: April 21, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiro Ikeda, Toru Yazaki, Yutaka Uematsu
  • Patent number: 10614014
    Abstract: To increase the number of selectable chips without adding a signal line to a general purpose memory controller. A semiconductor storage device includes a memory controller, a plurality of memory chips, a selection unit which is connected to the memory controller and is connected with the plurality of memory chips to be able to select any one of the plurality of memory chips, and a switch unit which is connected to the memory controller and the selection unit. The memory controller and the selection unit are connected by a signal line for transmitting a first signal outputted from the memory controller and configured to select the memory chips. The memory controller and the switch unit are connected by a signal line for transmitting a second signal outputted from the memory controller and configured to select the memory chips.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: April 7, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiro Ikeda, Yutaka Uematsu, Shungo Okabe, Akihiro Inamura, Takahiko Iwasaki, Junji Ogawa
  • Publication number: 20200088267
    Abstract: In one aspect of an electric actuator, a motor shaft has an eccentric shaft portion. A speed reducing mechanism has an externally toothed gear coupled to the eccentric shaft portion, an internally toothed gear engaged with the externally toothed gear, an output flange portion located on one side in an axial direction of the externally toothed gear, and a plurality of pillar members having pillar member bodies. The output flange portion has a plurality of through holes disposed along the peripheral direction. The pillar member bodies are inserted into the through holes, and support the externally toothed gear so that the externally toothed gear is capable of swinging around a central axis. The pillar member has a convex portion arranged on an outer peripheral surface of a part of the pillar member body. The convex portion is disposed facing one side peripheral in the axial direction of the edge portion.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 19, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hiroshi SHIRAI, Shuichi KINJO, Yutaka UEMATSU