Title:
MOTOR UNIT
Document Type and Number:
WIPO Patent Application WO/2020/213646
Kind Code:
A1
Abstract:
The motor unit according to an aspect of the present invention comprises a first shaft that rotates around a motor shaft, a second shaft extending along the motor shaft and coupled to the first shaft on one side, in the axial direction, of the first shaft so as to be capable of relative movement in the axial direction, a first bearing that supports the end, on the other side in the axial direction, of the first shaft, a second bearing that supports the end, on the one side in the axial direction, of the first shaft, a third bearing that supports the end, on the other side in the axial direction, of the second shaft, and a fourth bearing that supports the end, on the one side in the axial direction, of the second shaft. An elastic member is disposed on the surface, facing the other side in the axial direction, of the outer ring of the first bearing. The residual gap in the axial direction between the first bearing and the second bearing is larger than the residual gap in the axial direction between the third bearing and the fourth bearing.
Inventors:
FUKUNAGA KEISUKE (JP)
Application Number:
PCT/JP2020/016586
Publication Date:
October 22, 2020
Filing Date:
April 15, 2020
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
F16H1/08; H02K5/16; H02K5/173; H02K7/00; H02K7/116
Domestic Patent References:
| WO2018030372A1 | 2018-02-15 |
Foreign References:
| JP2016082621A | 2016-05-16 | |||
| JPH02254944A | 1990-10-15 |
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