Wheel-head feed mechanism and grinder using the same
US5928061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B47/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wheel-head feed mechanism for a grinder comprising a base and a wheel head which is guided by a linear guide section provided on the base and rotatably supports a grinding wheel via a wheel spindle driven by a motor. The wheel-head feed mechanism includes feed screw mechanism composed of a screw shaft and a nut unit engaged with the screw shaft, the feed screw mechanism advancing and retracting the wheel head with respect to a workpiece, and servomotor for rotating one of the screw shaft and the nut unit. The screw shaft is offset from the linear guide section toward the wheel spindle. The nut unit includes a radial hydrostatic bearing section for supporting the root of a male thread of the screw shaft in the radial direction of the screw shaft by hydrostatic pressure, as well as a thrust hydrostatic bearing section for supporting the flanks of the male thread of the screw shaft in the axial direction of the screw shaft by hydrostatic pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.