Rotary bearing, rotary table device and table diameter determining method
US8316776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2008 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | May 1, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2322/39
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary table device includes a hollow motor drive source, a table rotated thereby, and a rotary bearing supporting the table. The rotary bearing is provided an outer race having an inner surface to which a rolling surface is formed, an inner race having an outer peripheral surface to which a rolling surface opposing to the rolling surface of the outer race is formed, and a plurality of rolling members disposed in a rolling passage formed by the rolling surface of the outer race and the rolling surface of the inner race, and a cooling medium passage (α, β) is formed so as to be adjacent to either one of the inner race and outer race constituting a rotational driving side. According to the structure mentioned above, a rotary bearing and a rotary table device capable of achieving suitable cooling effect can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.