Magnetic disc drive motor including a fixed shaft having mounted

Details Magnetic disc drive motor including a fixed shaft having mounted Magnetic disc drive motor including a fixed shaft having mounted

1995-11-08

1997-02-25

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

310 90, 384543, G11B 1702, H02K 516, H02K 2900

Patent

active

056064756

ABSTRACT:
A magnetic disc drive motor contains a frame; a fixed shaft mounted on the frame; a lower bearing member mounted on a lower portion of the fixed shaft, the lower bearing member being provided with a roller ring rotating about the fixed shaft, the lower bearing member being provided with a loading portion defined at one end of the roller ring; an upper bearing member mounted on the upper portion of the fixed shaft, the upper bearing member being provided with a cylindrical roller ring; and a motor including: a rotor fixed under a loading surface portion of the loading portion of the lower bearing member; and a stator disposed inside the rotor and fixed to a frame, wherein each of the roller rings is fitted in the center hole of a magnetic disc and an inner peripheral portion of the magnetic discs are loaded on the loading portion.

REFERENCES:
patent: 2274779 (1942-03-01), Davis
patent: 3431525 (1969-03-01), Buntschuh et al.
patent: 4810108 (1989-03-01), Yajima
patent: 4858044 (1989-08-01), Crapo
patent: 4958945 (1990-09-01), Nakanishi
patent: 5045738 (1991-09-01), Hishida et al.
patent: 5128571 (1992-07-01), Itsu
patent: 5207514 (1993-05-01), Weissgerber

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