Pivot mechanism for rotary disc drives

Details Pivot mechanism for rotary disc drives Pivot mechanism for rotary disc drives

1988-07-18

1989-12-19

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

048886564

ABSTRACT:
An improved pivot mechanism for a disc drive system incorporating a rotary actuator. The disc drive system has a head positioning apparatus located within a housing for positioning a plurality of read/write heads relative to a recording media located within the housing. The head positioner assembly includes a pivot housing that is journaled about a pivot mechanism to rotatably coupled the head positioning assembly to the disc drive housing. The pivot mechanism includes a fixed pivot shaft that is supported by the drive housing on both ends and a pair of spaced apart bearings having outer races that are bonded to the pivot housing. The inner bearing races are bonded to the fixed shaft. The outer bearig races are adhesively bonded to the pivot housing under a predetermined preload maintained by a spacer and a pair of Belleville washers that push outward on the outer race during bonding. The pivot shaft and the pivot housing are both fabricated from the same material to minimize preloading variation during adhesive bonding of the outer races. The pivot shaft maintains a constant diameter between the bearings to maximize stiffness.

REFERENCES:
patent: 4249221 (1981-02-01), Cox
patent: 4713703 (1987-12-01), Asano
patent: 4754353 (1988-06-01), Levy

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