公开(公告)号：US20230069613A1

公开(公告)日：2023-03-02

申请号：US17893182

申请日：2022-08-23

Applicant: NIDEC CORPORATION

Inventor： Shohei OSUGA ,  Yoshiyuki AONO

IPC: F16H57/04 ,  H02K5/20 ,  H02K7/00 ,  H02K7/08 ,  H02K7/116 ,  H02K9/193

Abstract: A drive apparatus includes a motor having a rotor with a hollow motor shaft and a stator, a gear connected to the rotor, a housing including a motor housing accommodating the motor, and a gear housing at one side in an axial direction of the motor housing and accommodating the gear, and a passage. The gear includes a hollow gear shaft connected to one side in the axial direction of the motor shaft. The passage includes a first portion connecting the inside of the gear housing and the inside of the gear shaft, a second portion at least partially configured by the inside of the gear shaft and the inside of the motor shaft and connected to the first portion, a third portion connected to the second portion on the other side in the axial direction, and a first supply portion connected to the third portion and above the stator.

公开(公告)号：US20230006507A1

公开(公告)日：2023-01-05

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 ,  H02K7/00 ,  H02K5/16

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.