Device for converting a rotational movement into an axial movement
US6170351A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19795
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for converting a rotary motion into an axial motion has a threaded spindle (1), a nut concentrically surrounding the threaded spindle with a clearance and a plurality of axially parallel rollers (2) guided in a cage (6) and arranged in the clearance, said rollers (2) have a circumferential profile by which they mesh with the external thread of the threaded spindle (1) and with the corresponding internal thread of the nut. Each of these rollers (2) is axially displaceable within the cage (6) by the dimension of the thread pitch during a rotation of the nut relative to the threaded spindle (1), while at the end of such a rotation, each roller (2) is re-displaceable within an axial groove (7) of the nut into the starting position by a cam (8, 12) arranged in the vicinity of each end face of the cage (6). According to the invention, the nut is a thin-walled sheet metal sleeve (3) made by non-chipping shaping. In this way, a device with a simpler structure and more economic to manufacture is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.