Disk storage device having spindle assembly with ring enclosure

Details Disk storage device having spindle assembly with ring enclosure Disk storage device having spindle assembly with ring enclosure

1995-06-07

1998-08-18

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, 369269, 310 67R, G11B 1702, H02K 516

Patent

active

057965480

ABSTRACT:
A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor housing including a permanent magnet coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. A hub is provided that is concentric to the rotor housing and is connected to the rotor housing for rotation therewith. A bearing above the stator rotatably supports an upper end of the rotor housing on a stationary shaft and a bearing below the stator braces the open end of the rotor housing by a ring element having substantially the same heat expansion characteristics as the rotor housing.

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