Title:
DIFFERENTIAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/024610
Kind Code:
A1
Abstract:
This invention maintains a smooth rotation operation of a pinion gear. The differential device is equipped with: a differential case having a case body and a rotary shaft part that protrudes from the case body and is supported so as to be capable of rotation around a first axis of rotation; a side gear; and a pinion gear. An introduction groove for introducing lubricating oil into an accommodation space of the case body is formed in an inner circumferential surface of the rotary shaft part. An inner-surface groove communicating with the introduction groove and extending toward the back-surface side of the pinion gear is formed in an inner surface of the case body. The inner-surface groove includes a first groove portion and a second groove portion that is positioned on the outside of the first groove portion in the radial direction of the case body. At least a portion of the first groove portion is shaped such that, in comparison with the shape of the second groove portion, the lubricating oil is less susceptible to overflowing when the vehicle is moving.
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Inventors:
SEKIGUCHI AKUTO (JP)
Application Number:
PCT/JP2020/022798
Publication Date:
February 11, 2021
Filing Date:
June 10, 2020
Export Citation:
Assignee:
MUSASHI SEIMITSU KOGYO KK (JP)
International Classes:
F16H48/08; F16H57/04
Foreign References:
| JPH10159943A | 1998-06-16 | |||
| JP2007002885A | 2007-01-11 | |||
| JP2019011849A | 2019-01-24 | |||
| JP2017116035A | 2017-06-29 |
Attorney, Agent or Firm:
ALPHA INTERNATIONAL PATENT FIRM (JP)
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