Disk storage device with electric motor with axially deep flange

Details Disk storage device with electric motor with axially deep flange Disk storage device with electric motor with axially deep flange

1997-08-20

1999-09-07

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 310156, 277 57, 360 9908, H02K 700

Patent

active

059491647

ABSTRACT:
A compact disk storage device having outer-rotor electric motor for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals and substantial and abutting axial extents along the axis of the stationary shaft.

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