Spindle motor of a small-scale design
US7309937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2006 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Feb 14, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The spindle motor described herein comprises a rotor having a rotor hub and a shaft connected to the rotor hub, a cylindrical bearing sleeve having a central bore to accommodate the shaft and a collar disposed at the receiving aperture, a cup-shaped bearing housing closed at one end to accommodate the bearing sleeve, a baseplate to hold the bearing receiving portion, a stopper ring disposed at the inside circumference of the rotor hub between the collar and the baseplate, and at least one radial bearing region formed between the outside diameter of the shaft and the inside diameter of the bore and defined by surface patterns. According to the invention, an annular axial bearing region is provided formed between a lower face of the collar and an upper face of the stopper ring. This design and construction makes it possible to realize spindle motors having small dimensions and, in particular, low overall heights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.