Ball screw device having lubricating device
US8082814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2008 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Sep 6, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18744
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball screw device includes a ball nut rotatably engaged onto a screw shaft for forming a gap between the ball nut and the screw shaft and for receiving a lubricating oil and for forming a helical raceway between the ball nut and the screw shaft, a number of bearing members engaged between the ball nut and the screw shaft and in the helical raceway, and a forcing device includes a barrel having an outer helical member for forming a helical channel and for receiving the lubricating oil, and for forcing the lubricating oil to flow into the gap between the ball nut and the screw shaft and to effectively lubricate the bearing members when the barrel is rotated relative to the screw shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.