Screw-nut feed mechanism
US5140863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1868
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screw-nut feed mechanism for effecting displacement of a movable table on a guiding base or bed in accordance with rotation of a feed screw shaft mounted on the guiding base. Ther feed mechanism includes a ball nut assembly threadedly coupled with the feed screw shaft, and a floatably supporting member for floatably supporting the ball nut assembly. The floatably supporting member is composed of a board having a predetermined thickness in a direction parallel to the rotational axis of the feed screw shaft. The floatably supporting member is formed with plural slots penetrating the floatably supporting member in a direction parallel to the axis of the feed screw shaft so as to form a fixed portion, a first floating portion, first flexible connecting portions which support the first floating portion for movement relative to the fixed portion in a first direction perpendicular to the axis of the feed screw shaft, a second floating portion, and second flexible connecting portions which support the second floating portion for movement relative to the first floating portion in a second direction perpendicular to the axis of the feed screw shaft and the first axis. The ball nut assembly…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.