Telescopic shaft and steering system
US9707991B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A telescopic shaft includes: an inner shaft where a pair of recessed grooves that face each other in a direction perpendicular to an axis and extend in an axial direction are formed; an outer shaft where a pair of recessed grooves that face each other in the direction perpendicular to the axis and extend in the axial direction are formed; a plurality of rolling bodies that are disposed between each of the recessed grooves and the corresponding recessed groove so as to form a line in the axial direction; a pair of stoppers; and a buffer body unit. Each of the stoppers restricts falling of a rolling body at an end portion of the corresponding line from the corresponding recessed groove of the inner shaft. The buffer body unit integrally includes a pair of buffer bodies, and a connection portion that connects the pair of buffer bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.