Disk rotating device having dynamic-pressure fluid bearings

Details Disk rotating device having dynamic-pressure fluid bearings Disk rotating device having dynamic-pressure fluid bearings

1994-05-19

1996-04-02

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, 384107, G11B 1708

Patent

active

055046371

ABSTRACT:
A disk rotating device includes a stationary shaft having one end fixed to a casing, a minor shaft having one end fixed to the casing, a flange member located on one end face of the stationary shaft and being in contact with a contact portion of the minor shaft, a rotary member rotatably mounted around the stationary shaft and supporting a disk, a thrust plate fixed in the vicinity of an end face of the rotary member and being in contact with the flange member, and a motor having a motor stator provided in the casing and a motor rotor provided in the rotary member so as to rotate the disk together with the rotary member around the stationary shaft. A radial bearing groove is provided on at least one of an outer circumferential surface of the stationary shaft and an inner circumferential surface of the sleeve. An outer thrust bearing groove is provided on a surface of at least one of the flange member and the thrust plate, at which the flange member and the thrust plate are in contact with each other. These grooves have lubricant retained therein.

REFERENCES:
patent: 5012359 (1991-04-01), Kohno
patent: 5193084 (1993-03-01), Christiaens
patent: 5210665 (1993-05-01), Nishizawa
patent: 5291358 (1994-03-01), Takahashi
patent: 5328271 (1994-07-01), Titcomb
Article of Nikkei Sangyo Shinbun (Nikkei Industrial News), Apr. 22, 1993.

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