Drive device
US10916992B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2017 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Aug 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/203
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive device includes a rotor, a stator, a housing including an accommodation portion to store oil, a pump driven through a motor shaft, and a transmission that transmits rotation of the motor shaft to a pump shaft. The pump includes an external gear fixed to the pump shaft, an internal gear surrounding the external gear and meshing with the external gear, a pump room provided in the housing and accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The housing includes a first oil passage connected to the discharge port. The motor shaft includes a second oil passage provided in the motor shaft and connected to the first oil passage and a first through-hole connecting the second oil passage and an outer circumferential surface of the motor shaft. The suction port is open to a lower region in a vertical direction of the accommodation portion, and allows the oil in the accommodation portion to be sucked into the pump room.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.