公开(公告)号：US20200036255A1

公开(公告)日：2020-01-30

申请号：US16515045

申请日：2019-07-18

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Shuichi KINJO ,  Kazuhiro SAITO

IPC: H02K3/52 ,  H02K1/14 ,  H02K3/38 ,  H02K7/116 ,  H02K11/33

Abstract: The stator of the stator unit has a stator core in an annular shape along a circumferential direction, an insulator attached to the stator core, and coils attached to the stator core via the insulator. The bus bar unit of the stator unit has a bus bar holder for holding the bus bar on one side in an axial direction of the insulator. The bus bar has a terminal part extending closer to the one side in the axial direction than the bus bar holder and a coil connection part connected to a coil lead wire drawn from the coils to the one side in the axial direction. One of the bus bar holder and the insulator has claw parts protruding in the radial direction, and the other of them has a hooking part to which the claw parts are hooked and fixed in the axial direction.

公开(公告)号：US20200307527A1

公开(公告)日：2020-10-01

申请号：US16792287

申请日：2020-02-16

Applicant: NIDEC TOSOK CORPORATION ,  NIDEC ELESYS CORPORATION

Inventor： Kazuhiro SAITO ,  Seiji HASHIMOTO ,  Agato UENO

IPC: B60T1/06 ,  H02K11/21 ,  H02K11/27

Abstract: An actuator includes a control part, a first rotation sensor, and a second rotation sensor able to detect rotation of an output shaft. The control part performs a first rotation angle acquisition control for acquiring a target rotation angle of the output shaft when a movable part is moved from the second position to the first position as a first rotation angle. The first rotation angle is a rotation angle of the output shaft that is closer to the second position side than when the movable part abuts the first wall part. In the first rotation angle acquisition control, the control part causes the movable part abuts the first wall part, acquires a rotation angle of the output shaft when the movable part has abutted the first wall part, and calculates the first rotation angle based on the rotation angle of the output shaft that has been acquired.

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：US20190319511A1

公开(公告)日：2019-10-17

申请号：US16382158

申请日：2019-04-11

Applicant: NIDEC TOSOK CORPORATION

Inventor： Kazuhiro SAITO ,  Hiroaki TAKAHASHI ,  Tadayuki HATSUDA

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

Abstract: There is provided an electric actuator including a motor part, a deceleration mechanism, an output part, and a housing. The housing has a housing main body and a lid member. An output shaft is positioned at a first corner of the housing. The lid member and the housing main body are fastened by bolts. The bolts include corner bolts positioned at respective corners of the housing other than the first corner and an intermediate position bolt positioned at the intermediate between the first corner and a second corner adjacent to the first corner. In a plane view, the intermediate position bolt is positioned on the side of the planar center with respect to an edge connecting the first corner and the second corner and on the side of an outer edge with respect to an imaginary line connecting the center of the output shaft and the second corner.