公开(公告)号：US20190199177A1

公开(公告)日：2019-06-27

申请号：US16232084

申请日：2018-12-26

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yutaka UEMATSU ,  Jaehyun KIM ,  Toshiaki NAKAMURA ,  Shuichi KINJO ,  Hiroshi SHIRAI

IPC: H02K11/215 ,  H02K7/116

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.

公开(公告)号：US20190173356A1

公开(公告)日：2019-06-06

申请号：US16209971

申请日：2018-12-05

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Toshiaki NAKAMURA ,  Yutaka UEMATSU

IPC: H02K7/116 ,  F16H57/02 ,  H02K11/215

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.

公开(公告)号：US20180283524A1

公开(公告)日：2018-10-04

申请号：US15936530

申请日：2018-03-27

Applicant: Nidec Tosok Corporation

Inventor： Yutaka UEMATSU ,  Kazumi SHINKAI ,  Shun KATO ,  Shuichi KINJO ,  Kohei OSUGA ,  Tadayuki HATSUDA

IPC: F16H57/027 ,  H02K5/10 ,  H02K5/173

CPC classification number: F16H57/027 ,  H02K5/10 ,  H02K5/15 ,  H02K5/1732 ,  H02K7/116 ,  H02K2205/09

Abstract: There is provided a breather structure of an actuator in which the breather structure is provided in a housing of the actuator, the breather structure including: a recessed groove positioned on an outer surface of the housing; a breathing hole which is positioned on a bottom surface of the recessed groove and passes through the housing in a first direction; a filter fixed to an inside of the housing so that the filter closes an opening of the breathing hole; a lid body which partially covers a region of the recessed groove including the breathing hole from an outside of the housing when viewed from the first direction; a breather opening portion positioned at a portion of the recessed groove exposed from the lid body; and a protrusion portion which protrudes from the bottom surface of the recessed groove to a side of the lid body.

公开(公告)号：US20180223973A1

公开(公告)日：2018-08-09

申请号：US15886885

申请日：2018-02-02

Applicant: Nidec Tosok Corporation

Inventor： Yutaka UEMATSU ,  Shuichi KINJO

IPC: F16H25/20 ,  F16H61/26 ,  H02K7/06 ,  H02K11/21

CPC classification number: F16H25/2015 ,  F16H59/105 ,  F16H61/12 ,  F16H61/26 ,  F16H2001/325 ,  F16H2025/2031 ,  F16H2061/326 ,  H02K5/1732 ,  H02K5/225 ,  H02K7/06 ,  H02K7/116 ,  H02K11/21 ,  H02K11/215

Abstract: There is provided an electric actuator including: a motor that has a motor shaft, a speed reduction mechanism, an output portion that has an output shaft portion, a rotation detection device, and a first bearing. The output shaft portion extends in an axial direction and is disposed on one side in the axial direction of the motor shaft. The output portion has a first recessed portion recessed from the other side to the one side in the axial direction. An end portion of the motor shaft on the one side in the axial direction is accommodated in the first recessed portion. The first bearing is fixed to an inside surface of the first recessed portion in a radial direction. At least a portion of the rotation detection device is disposed at a position overlapping the first recessed portion in the radial direction.