Bearing mechanism, spindle motor and data storage medium drive apparatus
US7946769B2 · kind B2 · utility
1Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2008 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jan 24, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bearing mechanism includes a shaft, a bearing portion, and a cover closing a bottom end of the bearing portion. The bearing portion and the cover are preferably connected to one another by laser welding. A surface of a welded portion formed by the laser welding includes an inclined surface which is inclined such that the further from a central axis a portion thereof is, the axially higher the portion is. With this unique structure, contamination of lubricant used inside the bearing mechanism by fumes generated due to the laser welding is minimized, and therefore a reliable and durable bearing mechanism is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.