Spindle balance device for a hard disk drive assembly

Details Spindle balance device for a hard disk drive assembly Spindle balance device for a hard disk drive assembly

1994-05-02

1996-07-16

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, G11B 1702

Patent

active

055372724

ABSTRACT:
A spindle balancing device (10) for a hard disk drive assembly (12) having a spindle (11) mounted for rotation about a longitudinal axis (13) thereof. The balance device (10) includes a rigid, substantially flat weight member (17) formed and dimensioned to movably mount to an end surface (15) of the spindle (10) in superimposed relation thereto, which positions a center of gravity (CG) of the weight member (17) on one side of the longitudinal axis (13). The weight member (17) includes a positioning structure formed to cooperate with a protruding inner lip portion (16) circumferentially extending around the longitudinal axis (13) from the end surface (15) to selectively position the center of gravity (CG) at a predetermined position relative the longitudinal axis (13). As a result, the combined moment of inertia about the longitudinal axis (13) of the spindle (11), a disk member (14) mounted to the spindle (11) and the balance device (10) is within a substantially small predetermined tolerance to promote spin balancing.

REFERENCES:
patent: 4739425 (1988-04-01), Dierkes et al.

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