Spindle motor of a small-scale design

Details Spindle motor of a small-scale design Spindle motor of a small-scale design

2007-12-18

2007-12-18

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

11353485

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.

REFERENCES:
patent: 6071014 (2000-06-01), Lee et al.
patent: 6456458 (2002-09-01), Ichiyama
patent: 6483215 (2002-11-01), Bodmer et al.
patent: 6768236 (2004-07-01), Tokunaga
patent: 6781268 (2004-08-01), Oku
patent: 6836388 (2004-12-01), Nishimura
patent: 6888278 (2005-05-01), Nishimura
patent: 7015611 (2006-03-01), Tokunaga et al.
patent: 2004/0091187 (2004-05-01), Aiello et al.
patent: 2004/0104634 (2004-06-01), Nishimura et al.

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