Patents by Inventor Yasuo Yamaguchi

Yasuo Yamaguchi 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: 11201523
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis, a reduction gear including an intermediate gear to rotate about an intermediate axis and connected to the motor, a differential including a ring gear to rotate about a differential axis and connected to the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space to be fed to the motor. The housing includes a ceiling portion directly above the reduction gear and the differential. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. The motor axis, the intermediate axis, and the differential axis extend in parallel with one another along a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 14, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Patent number: 11148937
    Abstract: A method includes attaching an upper substrate to an upper surface of a sensor substrate, forming, on an upper surface of the upper substrate, a mask providing a first opening and a second opening communicating with the first opening, the second opening having a width that decreases with increase in a distance from the first opening, carrying out a sandblast process on the upper substrate exposed to an outside via the first opening and the second opening, allowing the sensor substrate to be exposed to the outside immediately below the first opening, and forming a slope on the upper substrate immediately below the second opening, and forming a first wiring member in contact with the exposed sensor substrate and a second wiring member being in contact with the slope and continuing to the first wiring member.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: October 19, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yasuo Yamaguchi
  • Patent number: 11137061
    Abstract: A motor unit includes a motor including a rotor, a reduction gear including an intermediate gear to rotate about an intermediate axis, a differential including a ring gear arranged to rotate about a differential axis, a housing, oil in a vertically lower region of a housing space, and an oil passage to feed the oil to the motor. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. A motor axis, the intermediate axis, and the differential axis to extend in parallel with one another in a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: October 5, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Patent number: 11136975
    Abstract: A pump includes an external gear, an internal gear surrounding the external gear to mesh with the external gear, a pump chamber to house the internal gear and the external gear, a suction inlet to suck an oil into the pump chamber, and a discharge outlet to discharge the oil from inside the pump chamber. The housing includes an outer cover having the pump chamber defined therein, and a first oil passage defined in the outer cover and connected to the discharge outlet. The motor shaft includes a second oil passage connected to the first oil passage, and a first through hole to connect the second oil passage to the motor shaft. The second oil passage opens into the first oil passage at the end portion of the motor shaft.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 5, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Yuki Ishikawa
  • Patent number: 11139720
    Abstract: A drive apparatus includes a motor that includes a motor shaft disposed along a first central axis that extends in one direction a housing that includes a first housing portion housing the motor and that is capable of storing oil, a liquid cooling portion disposed in thermal contact with an inverter electrically coupled to the motor, the liquid cooling portion including a refrigerant liquid flowing therein, and a pipe portion connected to the liquid cooling portion, the refrigerant liquid inside the liquid cooling portion flowing in the pipe portion. The pipe portion passes inside the housing.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 5, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Takayuki Migita, Yuki Ishikawa
  • Publication number: 20210288550
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis, a reduction gear including an intermediate gear to rotate about an intermediate axis and connected to the motor, a differential including a ring gear to rotate about a differential axis and connected to the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space to be fed to the motor. The housing includes a ceiling portion directly above the reduction gear and the differential. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. The motor axis, the intermediate axis, and the differential axis extend in parallel with one another along a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis.
    Type: Application
    Filed: August 7, 2017
    Publication date: September 16, 2021
    Inventors: Yuki ISHIKAWA, Yasuo YAMAGUCHI, Takayuki MIGITA
  • Patent number: 11022112
    Abstract: A drive apparatus to be mounted on a vehicle includes a motor body including a rotor to rotate about a central axis extending in a horizontal direction perpendicular to a direction of travel of the vehicle, and a stator radially outside of the rotor, a housing including a housing portion to house the motor body, oil in a vertically lower region of the housing portion, and a pump to move the oil from the vertically lower region of the housing portion to feed the oil to the motor body. A liquid surface of the oil in the vertically lower region of the housing portion approaches the central axis to bring the oil into contact with the rotor as a result of the vehicle being inclined forward or rearward in the direction of travel.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: June 1, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Yuki Ishikawa
  • Patent number: 10958136
    Abstract: A drive apparatus includes a motor that includes a motor shaft disposed along a first central axis that extends in one direction, a housing that includes a first housing portion housing the motor and that is capable of storing oil, and a liquid cooling portion disposed in thermal contact with an inverter electrically coupled to the motor, the liquid cooling portion including a refrigerant liquid flowing therein. The housing includes a contact portion with which the liquid cooling portion is in thermal contact. At least a portion of the contact portion is disposed below an oil surface of the oil stored in the housing.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 23, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Takayuki Migita, Yuki Ishikawa
  • Publication number: 20210083548
    Abstract: A motor assembly includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.
    Type: Application
    Filed: November 2, 2020
    Publication date: March 18, 2021
    Inventors: Yasuo YAMAGUCHI, Takayuki MIGITA, Yuki ISHIKAWA
  • Patent number: 10941768
    Abstract: A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, and a pump driven through a motor shaft. The pump includes an external gear fixed to an end on one side in an axial direction of the motor shaft, an internal gear surrounding a radial outside of the external gear and meshing with the external gear, a pump room accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes an outer lid in which the pump room is provided.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: March 9, 2021
    Assignee: NIDEC CORPORATION
    Inventor: Yasuo Yamaguchi
  • Patent number: 10916992
    Abstract: A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, a pump driven through a motor shaft, and a transmission that transmits rotation of the motor shaft to a pump shaft. The pump includes an external gear fixed to the pump shaft, an internal gear surrounding the external gear and meshing with the external gear, a pump room provided in the housing and accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes a first oil passage connected to the discharge port. The motor shaft includes a second oil passage provided in the motor shaft and connected to the first oil passage and a first through-hole connecting the second oil passage and an outer circumferential surface of the motor shaft.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: February 9, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Yuki Ishikawa
  • Patent number: 10879769
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, a differential connected to the motor, a housing including a housing space to house the motor and the differential, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A pump is fixed to an outer peripheral surface of the housing and is located in a channel of the oil passage. The pump is on an opposite side of the motor axis with respect to the differential when viewed in an axial direction of the motor axis.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 29, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Patent number: 10865873
    Abstract: A motor unit includes a motor including a shaft to rotate about a motor axis, and a stator, a reduction gear, and a housing. The shaft includes a first shaft portion, a connecting shaft portion, and a second shaft portion arranged coaxially with one another, and a separating mechanism between the connecting shaft portion and the second shaft portion. The first shaft portion includes a first end portion. The connecting shaft portion includes a second end portion coupled to the first end portion, a third end portion located on a side opposite to the second end portion, and a connection flange portion extending radially outward. The second shaft portion includes a fourth end portion. The separating mechanism selectively separates the connection flange portion and the fourth end portion from each other.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 15, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Patent number: 10868452
    Abstract: A motor includes a rotor to rotate about a motor axis, and a stator radially outside of the rotor. The rotor includes a shaft extending along the motor axis, and including a collar portion and a screw portion located along an axial direction on an outer circumferential surface thereof, a rotor core surrounding the shaft from radially outside, a rotor magnet fixed to the rotor core, a pair of plate-shaped end plates on both axial sides of the rotor core, and a nut screwed onto the screw portion. The rotor core and the pair of end plates are held between the collar portion and the nut. Each end plate includes a first surface opposite to an axial end surface of the rotor core, and a second surface facing away from the first surface. The first surface includes a slanting surface that slants toward the rotor core and extends radially outward, and is in contact with the axial end surface of the rotor core.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 15, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Yasuo Yamaguchi
  • Patent number: 10862373
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, and a stator radially outside of the rotor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A channel of the oil passage includes a main reservoir and an auxiliary reservoir to store the oil. Each of the main reservoir and the auxiliary reservoir includes an outflow port to feed the oil to the motor. The main reservoir is located on an upstream side of the auxiliary reservoir in the oil passage. The auxiliary reservoir is structured to receive a portion of the oil overflowing from the main reservoir.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 8, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Takayuki Migita, Yasuo Yamaguchi
  • Patent number: 10862365
    Abstract: A motor unit includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 8, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yasuo Yamaguchi, Takayuki Migita, Yuki Ishikawa
  • Patent number: 10746172
    Abstract: In a drive device, a pump includes a pump room in a housing, a suction port through which oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes an inner lid that holds a bearing journaling a motor shaft and covers one side in an axial direction of a stator, an outer lid that is attached to one side in the axial direction of the inner lid and covers one side in the axial direction of the motor shaft, and a suction oil passage connecting a lower region in a vertical direction in an accommodation portion and the suction port. At least a portion of the suction oil passage is between the inner lid and the outer lid. The inner lid includes an opening penetrating the inner lid and connecting the lower region in the vertical direction and a portion of the suction oil passage between the inner lid and the outer lid. The strainer is provided in the opening.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: August 18, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Yasuo Yamaguchi
  • Patent number: 10690134
    Abstract: A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil and accommodate the rotor and the stator, a pump driven through a motor shaft, and a valve in the housing. The pump includes a pump room in the housing, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes a first oil passage connected to the discharge port and a branch oil passage that is connected to the first oil passage and is open to an inside of the accommodation portion on an upper side in a vertical direction of the stator. The motor shaft includes a second oil passage located in the motor shaft and connected to the first oil passage and a first through-hole connecting the second oil passage and an outer circumferential surface of the motor shaft.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: June 23, 2020
    Assignee: NIDEC CORPORATION
    Inventor: Yasuo Yamaguchi
  • Publication number: 20200180948
    Abstract: A method includes attaching an upper substrate to an upper surface of a sensor substrate, forming, on an upper surface of the upper substrate, a mask providing a first opening and a second opening communicating with the first opening, the second opening having a width that decreases with increase in a distance from the first opening, carrying out a sandblast process on the upper substrate exposed to an outside via the first opening and the second opening, allowing the sensor substrate to be exposed to the outside immediately below the first opening, and forming a slope on the upper substrate immediately below the second opening, and forming a first wiring member in contact with the exposed sensor substrate and a second wiring member being in contact with the slope and continuing to the first wiring member.
    Type: Application
    Filed: October 7, 2019
    Publication date: June 11, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Yasuo YAMAGUCHI
  • Patent number: 10648833
    Abstract: A measurement device includes: attachment holes, provided on a scale frame with respect to a measurement direction; rear-face bushings inserted into the attachment holes from a rear face side of the scale frame; and fasteners that fix the scale frame to first measurement target part. Each of the rear-face bushings includes: a cylinder part, which is formed shorter than the length of the attachment holes with respect to a penetration direction and is formed having an outer diameter smaller than the inner diameter of the attachment holes; a flange, which is formed at the end of the cylinder part located toward the first measurement target part and which has an outer diameter greater than the inner diameter of the attachment holes; and an elastic member, which is cylindrical in shape and is provided covering the outer circumferential surface of the cylinder part.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: May 12, 2020
    Assignee: MITUTOYO CORPORATION
    Inventors: Yasuo Yamaguchi, Tomoyuki Otake