Bearing system for high speed spindles of machine tools
US4926493A · kind A · utility
Inventor
Key dates
| Filing date | Dec 20, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Dec 20, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2322/39
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A bearing system for high speed spindles of machine tools, particularly grinding machines, comprises at least one front bearing arranged close to the spindle flange and a rear bearing, which in each case have three support rolls acting equiangularly on the spidle and having a larger diameter than the latter. In order to obtain a clearance-free bearing system in the case of speeds up to 150,000 rpm satisfying the precision requirements made on precison machine tools, the support rolls are fixed and mounted with roll journals provided on either side in small diameter precision ballbearings in the casing receiving the spindle and the support rolls. The spindle has as bearing surfaces conical portions inclined against one another and with resepct to which the axis of the support rolls is parallel. At least the support rolls of one bearing are adjustable axially parallel to the spindle for prestressing or pretensioning purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.