Plunging shaft and drive shaft assembly including same
US12031594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2020 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Feb 13, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2300/0212
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plunging shaft includes: a first shaft having an outer part defining a cylindrical bore and a through hole; a second shaft having an inner part; a ball spline structure connecting the outer part and the inner part so as to transmit rotational power while being relatively movable with respect to each other; and a sealing member that is inserted into the through hole to seal the through hole. The ball spline structure includes: a plurality of outer ball grooves; a plurality of inner ball grooves; a plurality of power transmitting balls; and a ball cage. The outer part is provided with an air discharging groove for discharging air in a space formed by a front end of the second shaft and the cylindrical bore when the first shaft and the second shaft move relatively move to become closer to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.