Shrink-fit disk-clamp for hard disk drives

Details Shrink-fit disk-clamp for hard disk drives Shrink-fit disk-clamp for hard disk drives

1997-05-29

1999-08-17

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9912, G11B 1708

Patent

active

059402440

ABSTRACT:
A ring shaped-disk clamp for clamping a disk stack to a spindle motor. The ring-shaped disk clamp is referred to as a shrink-fit disk clamp and must be expanded by heating prior to being inserted onto the hub of a spindle motor. Once inserted onto the hub of the spindle motor, an external axial load is applied to the disk clamp. As the disk clamp cools while applying the external load, the clamp contracts and provides a gripping force on the hub of the spindle motor. Subsequently, the external load is removed. The ring-shaped disk clamp includes a top surface, a bottom surface for contacting the disk stack, and an inner peripheral surface for contacting the hub. The inner peripheral surface contacts the hub at a hub contact area that is optimized to provide a localized gripping force on the hub. By optimizing the location of the hub contact area, the disk clamp can provide a relatively high gripping force with a low coefficient of friction between the disk clamp and the hub.

REFERENCES:
patent: 5214326 (1993-05-01), Yonei
patent: 5436775 (1995-07-01), Ishimatsu
patent: 5452157 (1995-09-01), Chow et al.
patent: 5497281 (1996-03-01), Jewell et al.
patent: 5636083 (1997-06-01), Sanada
patent: 5732458 (1998-03-01), Moir et al.

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