Invention Publication
- Patent Title: Vehicle Drive Motor
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Application No.: US18273124Application Date: 2021-09-13
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Publication No.: US20240128828A1Publication Date: 2024-04-18
- Inventor: Kenta SUZUKI , Shogo MIYAMOTO , Takaki ITAYA , Kosaku ONO
- Applicant: Hitachi Astemo, Ltd.
- Applicant Address: JP Hitachinaka-shi, Ibaraki
- Assignee: Hitachi Astemo, Ltd.
- Current Assignee: Hitachi Astemo, Ltd.
- Current Assignee Address: JP Hitachinaka-shi, Ibaraki
- Priority: JP 21047126 2021.03.22
- International Application: PCT/JP2021/033454 2021.09.13
- Date entered country: 2023-07-19
- Main IPC: H02K5/20
- IPC: H02K5/20 ; F16H57/04 ; H02K9/197

Abstract:
Provided is a vehicle drive motor capable of maintaining lubrication of a bearing even in a case where an electric vehicle is not operated for a long period of time. The vehicle drive motor includes a casing in which a cylindrical stator coil is fixed to an inner peripheral surface and an oil passage is provided in an upper portion, an output shaft arranged in the casing and having a rotor fixed to a position facing the stator coil, a bearing that supports the output shaft, and an oil retaining portion that is arranged to face the bearing and stores oil supplied from the oil passage. The oil retaining portion is a pocket-shaped receptacle in which an upper side is lower than a lower end of the output shaft and a lower side is along a lower outer periphery of the bearing as viewed from an axial direction of the output shaft in front view.
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