公开(公告)号：US20220320953A1

公开(公告)日：2022-10-06

申请号：US17704007

申请日：2022-03-25

Applicant: NIDEC CORPORATION

Inventor： Ryohei KASAHARA ,  Takayuki MAKINO ,  Masato AONO ,  Yoshiyuki Aono

IPC: H02K7/00 ,  H02K7/08 ,  H02K7/116 ,  H02K5/22 ,  H02K5/16

Abstract: A motor unit includes a shaft and an electrical discharging device. The shaft includes a helical gear. The electrical discharging device includes a contact member, a biasing member, and a case. The biasing member biases the contact member toward an end face of an end part of the shaft in a direction parallel to the axial direction of the shaft. The contact member has conductivity. The contact member is brought into contact with the end face by the biasing of the biasing member. The maximum stroke amount of the contact member in the axial direction is larger than the movement width of the shaft in the axial direction during rotation.

公开(公告)号：US12184154B2

公开(公告)日：2024-12-31

申请号：US17852396

申请日：2022-06-29

Applicant: NIDEC CORPORATION

Inventor： Keigo Nakamura ,  LiPeng Li ,  Takashi Shiraishi ,  Yoshiyuki Aono

IPC: H02K7/08 ,  H02K5/16 ,  H02K7/00

Abstract: A drive device includes a first bearing lubricated by a fluid and a second bearing lubricated by a lubricant having a higher electrical conductivity than the fluid. The first bearing rotatably supports a shaft extending in the axial direction along the rotation axis. A housing of the drive device has a first bearing holder that holds the first bearing. The second bearing is arranged between the shaft and the housing and rotatably supports the shaft. The second bearing is arranged in a space isolated from the first bearing holder.