Bearing mechanism, motor, and disk drive apparatus
US8630063B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2013 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Feb 25, 2033 |
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 portion, a sleeve portion, a lower opposing portion, a lower outer annular portion, and an upper opposing portion. The sleeve portion includes a sleeve body and a lower thrust plate. A radial dynamic pressure bearing portion is defined in a radial gap. A lower thrust dynamic pressure bearing portion is defined in a lower thrust gap. A lower seal portion is defined in a lower seal gap located between the sleeve portion and the lower outer annular portion. An upper seal portion is defined in an upper seal gap continuous with an upper thrust gap. The sleeve portion includes a first communicating channel in communication with the upper seal gap, and a second communicating channel located between the sleeve body and the lower thrust plate. A lower mouth portion of the first communicating channel axially overlaps the lower thrust dynamic pressure bearing portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.