Worm reducer and electric power steering system
US10661822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2018 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Sep 18, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.