Spindle motor with bearing part arrangement and disk driving device having same
US12308047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2022 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | May 27, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spindle motor includes a shaft, a base part, a stator core, a rotor, and a bearing part. The shaft extends along a center axis extending in the vertical direction and has a screw hole extending axially downward from the upper end thereof. The screw hole has a screw part onto which a screw is screwed. The bearing part includes an upper annular member, a lower annular member, and a sleeve. The upper annular member and the lower annular member protrude radially outward from an outer peripheral surface of the shaft and are disposed to be spaced apart from each other in the axial direction. The sleeve covers the outer peripheral surface of the shaft, extends in the axial direction, and is defined in a cylindrical shape. The upper end of the upper annular member is disposed lower than the lower end of the screw part in the axial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.