Spindle bearing assembly for a magnetic disk drive
US4775906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1986 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Apr 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk drive apparatus has a spindle holding mechanism for a spindle that supports a plurality of magnetic disks. The spindle is rotatably supported on a base by two bearings. Each bearing is pressed by a compressive coil spring to the base in the direction parallel with the plane of the magnetic disks and perpendicular to the axial direction of the spindle. Additionally, one of the bearings is affected with a pressing force in the axial direction of the spindle by another compressive coil spring. Therefore, even if the bearings have a thermal expansion coefficient different from that of the base, the thermal expansion can be absorbed by the compressive coil springs thereby preventing a generation of thermal stress between the parts. Consequently, deflection in relative position between the two bearings is prevented, and an inclination of the spindle is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.