Aerodynamic bearing assembly for spindle motor for hard disk drives
US7300209B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2002 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Nov 24, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is an aerodynamic bearing assembly for a spindle motor for hard disk drives, in which a hub of the spindle motor is pivoted in both radial and thrust directions by the ball bearing, which directly contacts the center of the hub, to perform rotation according to the rotational principle of a whirligig, and is subject to the thrust load through the aerodynamic bearing assembly with air groove(s) without being in contact with it, so that the hub maintains a rotational center without mechanical contact resulting in noise and starting failure of the assembly during an initial starting (low-speed rotation). The assembly includes air grooves, the air groove generating aerodynamic pressure between the hub and the aerodynamic bearing while the hub rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.