Device of a tool spindle
US6568886B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/309464
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Arrangement for a tool spindle equipped with a rotor (22) of an electric driving motor (32). It is distinguished in that the rotating part (1, 3) of the tool spindle is accommodated in a unit (4) that is stationary in relation to the rotating part, that the rotating part (1, 3) has at least one axial channel (12a, 12b or 12d) extending to the area for the rotor (22) for leading cooling fluid to the area (20a, 26), that the stationary unit (4) is provided with an inlet (16, 14 or 25) for leading cooling fluid to the channel (12a, 12b or 12d), that a gap sealing is arranged on either side of the inlet (16, 14, 25) between the stationary unit (4) and the rotating part (1, 3) and forms a dynamic bearing during the rotation of this, and that a channel is arranged to lead away the coolant fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.