The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2021
Filed:
Aug. 07, 2017
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A motor unit includes a motor including a rotor to rotate about a motor axis, a reduction gear including an intermediate gear to rotate about an intermediate axis and connected to the motor, a differential including a ring gear to rotate about a differential axis and connected to the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space to be fed to the motor. The housing includes a ceiling portion directly above the reduction gear and the differential. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. The motor axis, the intermediate axis, and the differential axis extend in parallel with one another along a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis. The ceiling portion is substantially parallel to an imaginary line imaginarily joining the motor axis and the differential axis when viewed in an axial direction of the motor axis.