公开(公告)号：US20220337118A1

公开(公告)日：2022-10-20

申请号：US17721355

申请日：2022-04-15

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Tomoki SATO

IPC: H02K5/173 ,  H02K7/116 ,  H02K11/215 ,  F16H15/50 ,  F16H61/664 ,  F16H37/12

Abstract: One aspect of an electric actuator of the present invention includes: a motor having a motor shaft rotatable about a motor axis; a transmission mechanism coupled to one side in the axial direction of the motor shaft; an output shaft extending in the axial direction of the motor shaft and to which rotation of the motor shaft is transmitted via the transmission mechanism; and a rolling member group including three or more rolling members arranged to surround the motor axis. The motor shaft is a hollow shaft. At least a part of the output shaft is located inside the motor shaft. The motor shaft and the output shaft are supported with each other in the axial direction and the radial direction via the rolling member group.

公开(公告)号：US20210381582A1

公开(公告)日：2021-12-09

申请号：US17340074

申请日：2021-06-06

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Tomoki SATO

IPC: F16H1/32 ,  H02K7/00 ,  H02K7/08 ,  H02K7/116 ,  F16H57/02

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 arranged facing the externally toothed gear, and column members arranged to protrude from one member of the facing member and the externally toothed gear toward the other member and surround the motor axis. The other member has hole portions arranged to surround 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. At least one of the column members is attached to the one member in a manner of being rotatable around a central axis of the at least one column member.