Fluid dynamic bearing device and motor with same
US9353790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2013 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | May 23, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2380/26
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid dynamic bearing device (1), including: a bearing member (22) on a rotary side; a housing (7) on a stationary side; a sealing member (9); a radial bearing gap to be formed between an outer peripheral surface (22a) of the bearing member (22) and an inner peripheral surface (7a2) of the housing (7); and a thrust bearing gap to be formed between a lower end surface (22c) of the bearing member (22) and an inner bottom surface (7b1) of the housing (7). The radial bearing gap and the thrust bearing gap are filled with lubricating oil (11). An axial gap (10) containing air is formed between an upper end surface (22b) of the bearing member (22) and a lower end surface (9b) of the sealing member (9), which faces the upper end surface (22b) of the bearing member (22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.