Motorized spindle for disk drive

Details Motorized spindle for disk drive Motorized spindle for disk drive

1991-04-09

1993-04-06

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, G11B 1702

Patent

active

052008665

ABSTRACT:
A disk drive spindle with a rotatable hub combines the advantages of a stationary shaft, a cartridge bearing assembly, and a motor mounted axially between the individual bearings of the cartridge bearing to rotate the hub with respect to the stationary shaft. The stator of the motor is mounted to the shaft so that it is disposed radially outwardly of the bearing assembly and at least partially axially between the individual bearings. The motor mount is cup shaped and has a central opening that axially receives and surrounds at least part of the bearing assembly, with the stator being secured to an outer surface of the cup. Alternately stated, one end of the bearing assembly is recessed within the mount.

REFERENCES:
patent: 4604665 (1986-08-01), Muller et al.
patent: 4683505 (1987-07-01), Schmidt et al.
patent: 4754351 (1988-06-01), Wright
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4965476 (1990-10-01), Lin
patent: 4965686 (1990-10-01), Young et al.
Matsushita, "Vibration Analysis of Disk-Spindle Due to Ball Bearing Excitation" Bulletin of Japanese Society of Mechanical Engineers, vol. 29, No. 256, Oct. 1986.

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