Brushless motor and method of manufacturing the same
US7466050B2 · kind B2 · utility
3Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2005 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Oct 5, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Fluid bearing mechanisms (6a and 6b) are formed between a shaft (2) and a central part (21) of an oil impregnated sintered sleeve (13). The oil impregnated sintered sleeve (13) has such an inner surface formed to be larger in aperture ratio at a thrust support end (23) and a loading end (22) than at a central part (21). With this configuration, it is possible to achieve a brushless motor which can suppress an increase in bearing loss while obtaining necessary bearing stiffness at high rpm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.