Title:
DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/030345
Kind Code:
A1
Abstract:
In one embodiment of this drive device, a pump unit comprises: an externally toothed gear which is fixed to one end of a motor shaft in the axial direction; an internally toothed gear which radially surrounds the outside of the externally toothed gear and meshes with the externally toothed gear; a pump chamber which houses the internally toothed gear and the externally toothed gear; an inlet which can suck oil into the pump chamber; and an outlet which can discharge oil from inside of the pump chamber. The pump chamber is provided in a housing which comprises an outer lid which covers one side of the motor shaft in the axial direction, and a first oil path which is provided in the outer lid and which is connected to the outlet. The motor shaft has a second oil path which is provided inside of the motor shaft and which communicates with the first oil path, and a first through-hole which connects the second oil path and the outer peripheral surface of the motor shaft. The first oil path is arranged on one side of the pump chamber in the axial direction. The second oil path opens to the first oil path at one end of the motor shaft in the axial direction.
Inventors:
YAMAGUCHI YASUO (JP)
ISHIKAWA YUKI (JP)
ISHIKAWA YUKI (JP)
Application Number:
PCT/JP2017/028600
Publication Date:
February 15, 2018
Filing Date:
August 07, 2017
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
F04C2/10; F04C15/00; H02K7/14; H02K9/19; H02K11/225
Domestic Patent References:
| WO2016033015A1 | 2016-03-03 |
Foreign References:
| JP2004218521A | 2004-08-05 | |||
| JPS6229487U | 1987-02-23 | |||
| JP2011033148A | 2011-02-17 |
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