Ball screw assembly
US7562599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | May 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19767
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball screw assembly includes a helical groove formed in the outer surface of the screw shaft without extending to both ends thereof, and an escape portion formed in the form of a slot is connected to one end of the helical groove of the screw shaft. The escape portion allows the cassette to abut against an outer periphery of the screw shaft, and the tongue portion is inserted deeply in the escape portion, such that the cassette is allowed to be rotated to effect axial movement relative to the screw shaft, thus finishing assembly of the nut, and the balls can be prevented from dropping out of the ball screw when the nut is disengaged from the screw shaft or when the nut moves out of travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.