Disc clamping system for a hard disc drive

Details Disc clamping system for a hard disc drive Disc clamping system for a hard disc drive

1997-02-03

1998-03-24

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 17038

Patent

active

057319286

ABSTRACT:
A disc clamping system, for clamping at least one disc in a disc stack in a disc drive against a disc flange on the hub of a spindle motor at one end of a disc mounting portion of the spindle motor hub, which includes a cylindrical disc clamping portion of the hub at the opposite end of the disc mounting portion of the hub from the disc flange and has a diameter less than the disc mounting portion of the hub, a spring member formed from planar material which includes a circumferential corrugation near its outer extreme and a central opening dimensioned to fit over the disc clamping portion of the hub, and a heat expandable clamp ring, dimensioned to fit over and engage the disc clamping portion of the hub, the clamp ring simultaneously pressing against the spring member closely adjacent the central opening in the spring member and deforming the spring member to produce a clamping force transferred to the discs via a contact surface formed by the circumferential corrugation. In a second aspect of the invention, the clamp ring includes a plurality of notches on its inner surface allowing the insertion of a clamp removal tool to facilitate rework and repair.

REFERENCES:
patent: 4683505 (1987-07-01), Schmidt et al.
patent: 5452157 (1995-09-01), Chow et al.

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