Title:
DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/030325
Kind Code:
A1
Abstract:
In one embodiment of a drive device according to the present invention, a housing includes an outer lid portion covering one side in the axial direction of a motor shaft. A pump unit includes: an externally toothed gear fixed to an end portion at one side in the axial direction of the motor shaft; an internally toothed gear which surrounds the radially outer side of the externally toothed gear and meshes with the externally toothed gear; a pump chamber which is recessed to one side in the axial direction from another side in the axial direction of the outer lid portion, and which houses the internally toothed gear and the externally toothed gear; a suction inlet port capable of sucking oil into the pump chamber; and a discharge port capable of discharging oil from inside the pump chamber. The motor shaft includes a motor shaft main body to which a rotor core is fixed, and a closure member fixed to the motor shaft main body. The closure member overlaps the internally toothed gear as seen in the axial direction, and closes at least a portion of an opening on said other side in the axial direction of the pump chamber.
Inventors:
MIGITA TAKAYUKI (JP)
ISHIKAWA YUKI (JP)
NAKAMATSU SHUHEI (JP)
ISHIKAWA YUKI (JP)
NAKAMATSU SHUHEI (JP)
Application Number:
PCT/JP2017/028552
Publication Date:
February 15, 2018
Filing Date:
August 07, 2017
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K9/19; F04C2/10; H02K11/225
Foreign References:
| JP2013055728A | 2013-03-21 | |||
| JP2008048494A | 2008-02-28 | |||
| JP2016101042A | 2016-05-30 |
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