公开(公告)号：US20200244132A1

公开(公告)日：2020-07-30

申请号：US16745363

申请日：2020-01-17

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K5/10 ,  H02K5/24 ,  H02K7/116

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.

公开(公告)号：US20180283972A1

公开(公告)日：2018-10-04

申请号：US15933419

申请日：2018-03-23

Applicant: Nidec Tosok Corporation

Inventor： Tomoka OSAWA ,  Hiroshi SHIRAI ,  Toshiaki NAKAMURA

IPC: G01L19/00 ,  G01L19/14

Abstract: A pressure sensor device includes a pressure sensor having a housing positioned on a center axis extending vertically, a sensing hole provided in a lower part of the housing, and an electrode unit provided in an upper part of the housing; and a connecting member having a contact spring that is pressed against the electrode unit of the pressure sensor. The electrode unit includes a first frame-shaped electrode having a frame-like shape that is rotationally symmetrical with respect to the center axis; and an annular first-surface portion on which the first frame-shaped electrode is placed.

公开(公告)号：US20210384798A1

公开(公告)日：2021-12-09

申请号：US17340111

申请日：2021-06-07

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Kohei OSUGA ,  Kenichi OZAWA

IPC: H02K7/116 ,  H02K7/00 ,  H02K11/33 ,  H02K7/08

Abstract: An electric actuator of the disclosure includes a motor, a speed reduction mechanism, and a bearing fixed to a motor shaft having an eccentric axis portion. The speed reduction mechanism has: an externally toothed gear, an internally toothed gear, a facing member facing the externally toothed gear, column members protruding from one member of the facing member and the externally toothed gear toward the other member and surrounding the motor axis, and at least one tube member surrounding the column members. The other member has hole portions surrounding the motor axis. The column members are inserted into the hole portions respectively, and support the externally toothed gear to be swingable around the motor axis via an inner side surface of each of the hole portions. The at least one tube member surrounds the column members in the hole portions and is rotatable around a rotary axis passing through the hole portions.

公开(公告)号：US20200251956A1

公开(公告)日：2020-08-06

申请号：US16716506

申请日：2019-12-17

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K7/04 ,  H02K7/116 ,  F16H1/32

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.

公开(公告)号：US20180275006A1

公开(公告)日：2018-09-27

申请号：US15922954

申请日：2018-03-16

Applicant: Nidec Tosok Corporation

Inventor： Tomoka OSAWA ,  Hiroshi SHIRAI ,  Toshiaki NAKAMURA

IPC: G01L19/14

CPC classification number: G01L19/142

Abstract: An oil pressure sensor attachment structure includes the oil path body; the sensor case; and a seal member. The oil path body has an accommodation hole portion which accommodates the oil pressure sensor. The accommodation hole portion has a small-diameter hole portion and a large-diameter hole portion. The sensor case has a columnar portion which is disposed along a central axis extending in the up and down direction and of which at least a portion is inserted into the small-diameter hole portion. A flange portion which protrudes from the columnar portion to an outside in a radial direction and is inserted into the large-diameter hole portion. The flange portion is disposed to face a lower side of the upper body in the up and down direction. The seal member has an annular shape, and seals a portion between an inner surface of the accommodation hole portion and the sensor case.

公开(公告)号：US20200251958A1

公开(公告)日：2020-08-06

申请号：US16737881

申请日：2020-01-08

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K7/116 ,  H02K7/00 ,  H02K7/08

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.

公开(公告)号：US20200018419A1

公开(公告)日：2020-01-16

申请号：US16504316

申请日：2019-07-07

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Toshiaki NAKAMURA

IPC: F16K37/00 ,  H05K5/02 ,  H01R4/02 ,  G01D5/14

Abstract: The sensor unit (40) includes a case (41) having a bottom surface (41a); a sensor element (42) including a sensor element main body (421) and a power supply terminal (42a); and a power supply bus bar (44) including an inclined part (44d). An end on one side of the power supply terminal (42a) is electrically connected to the sensor element main body (421). The case (41) further includes a terminal passage part (412a). In a state where the power supply terminal (42a) passes through the terminal passage part (412a), an end on the other side of the power supply terminal (42a) is in contact with the inclined part (44d) and the terminal passage part (412a) is in contact with a side surface of the power supply terminal (42a), so that movement of the power supply terminal (42a) in a direction away from the bottom surface (41a) is restricted.

公开(公告)号：US20200007010A1

公开(公告)日：2020-01-02

申请号：US16441012

申请日：2019-06-14

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Yutaka UEMATSU ,  Kazuhiro SAITO ,  Shuichi KINJO ,  Toshihiko AKIBA ,  Koichi ISHIGE

IPC: H02K11/215 ,  H02K7/00 ,  H02K7/116 ,  H02K5/04

Abstract: One aspect of an electric actuator of the disclosure includes: a motor having a motor shaft rotating about a central axis; a speed reduction mechanism connected to a portion on one side in an axial direction of the motor shaft; a case accommodating the motor and the speed reduction mechanism; an output part to which rotation of the motor shaft is transmitted via the speed reduction mechanism; a rotation detector having a rotation sensor detecting rotation of the output part; and a wiring member electrically connected with the rotation sensor. The case has a first concave part located on an outer surface of the case. One end part of the wiring member penetrates the case from inside the case and protrudes inside the first concave part. The rotation sensor is located inside the first concave part and connected with one end part of the wiring member.

公开(公告)号：US20200007002A1

公开(公告)日：2020-01-02

申请号：US16441007

申请日：2019-06-14

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Shuichi KINJO ,  Kazuhiro SAITO

IPC: H02K5/24 ,  H02K5/173 ,  H02K7/08 ,  H02K7/116 ,  F16H1/32 ,  F16C35/06

Abstract: An electric actuator includes: a motor; a first case accommodating the motor; a second case located on one side in an axial direction of the first case; a bearing holder fixed to the first case; and a first bearing held by the bearing holder. The first case has a wall part covering the other side in the axial direction of a stator and having a through hole. The bearing holder has: a holder cylindrical part holding the first bearing and inserted into the through hole; and a holder flange part fixed to the wall part. An inner diameter of the through hole is larger than an outer diameter of the holder cylindrical part. At least a part of a radially outer surface of the holder cylindrical part in a circumferential direction is located in a position radially inside and away from a radially inner surface of the through hole.

公开(公告)号：US20190036422A1

公开(公告)日：2019-01-31

申请号：US16041843

申请日：2018-07-23

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Shuichi KINJO ,  Yutaka UEMATSU ,  Kenichi OZAWA

IPC: H02K11/21 ,  H02K7/116 ,  F16H63/30 ,  H02K5/22 ,  H02K7/06 ,  F16H1/06 ,  G01D5/14 ,  H02P8/34

Abstract: An electric actuator includes a first wiring member with a first connection portion exposed to one side in an axial-direction of a first case and a second wiring member with a second connection portion exposed to another side in the axial-direction of a second case, the first and second connection portions each having two opposing portions that respectively oppose in first and second directions with first and second gaps therebetween, the first gap having a narrow portion and a wide portion (larger in the first direction) connected thereto on the other side in the axial-direction, the second gap having a narrow portion and a wide portion (larger in the second direction) connected thereto on the one side in the axial-direction, and the first and second gaps overlapping at least partially when the first and second case are fixed, and the first and second connection portions are electrically connected.