Spindle motor with an aerodynamic and hydrodynamic bearing assembly
US6674201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2000 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Apr 25, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/1677
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spindle motor (10) including a stator component (16), a rotor component (18), including a hub (14) for supporting one or more discs, and a bearing assembly between tHe components, formed of a journal bearing (54) and a thrust bearing (52), wherein the journal bearing (54) is an aerodynamic bearing and the thrust bearing is adapted to function in a bi-directional manner and includes an annular member (30) projecting radially from one of the components into an associated recess (76) formed in the other of the components. Preferably, the annular member has two opposed bearing faces (68,70) arranged adjacent corresponding bearing surfaces of the recess, and a hydrodynamic bearing is formed between the respective bearing faces and surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.