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1. (WO2018030324) DRIVE DEVICE

Pub. No.:    WO/2018/030324    International Application No.:    PCT/JP2017/028551
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Tue Aug 08 01:59:59 CEST 2017
IPC: H02K 9/19
F04C 2/10
F04C 15/00
Applicants: NIDEC CORPORATION
日本電産株式会社
Inventors: YAMAGUCHI, Yasuo
山口 康夫
ISHIKAWA, Yuki
石川 勇樹
Title: DRIVE DEVICE
Abstract:
One embodiment of this drive device comprises: a rotor; a stator; a housing that has a housing part that can store oil; a pump part that is driven via a motor shaft; and a transmission member that transmits the rotation of the motor shaft to a pump shaft. The pump part has: an external gear that is fixed to the pump shaft; an internal gear that surrounds the external gear and that meshes with the external gear; a pump chamber that is provided to the housing and that houses the internal gear and the external gear; an intake port that can take oil into the pump chamber; and a discharge port that can discharge oil from the pump chamber. The housing has a first oil passage that connects to the discharge port. The motor shaft has: a second oil passage that is provided inside the motor shaft and that connects to the first oil passage; and a first through hole that connects the second oil passage and an outer circumferential surface of the motor shaft. The intake port opens at a vertical direction lower region of the housing part and can take oil that is stored in the housing part into the pump chamber.