Bearing structure for hard disk drive

Details Bearing structure for hard disk drive Bearing structure for hard disk drive

1996-10-29

1998-08-18

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384107, 384112, F16C 3206

Patent

active

057950725

ABSTRACT:
A bearing structure for a hard disk drive includes a thrust bearing for forming a thrust air bearing for supporting a hub in an axial direction and a journal bearing for forming a journal air bearing for supporting the hub in a radial direction, being installed on the circumference of the shaft. According to the bearing structure, since each air bearing formed by the thrust and journal bearings noncontactly supports the hub in the axial and radial directions, the vibration occurring in a conventional ball bearing structure can be prevented. Therefore, a hard disk drive having high performance and low vibration characteristics can be manufactured.

REFERENCES:
patent: 5142173 (1992-08-01), Konno et al.
patent: 5280208 (1994-01-01), Komura et al.
patent: 5357162 (1994-10-01), Aiyoshizawa et al.
patent: 5358339 (1994-10-01), Konno et al.
patent: 5538347 (1996-07-01), Itoh et al.
Hwang et al., "A Study of Static and Dynamic Characteristics on Self-Acting Waved-Journal Air Bearing", International Tribology Conference, Yokohama 1995, Synopses.
Florin Dimofte, "A Waved Journal Bearing Concept-Evaluating Steady-State and Dynamic Performance with a Potential Active Control Alternative", DE-vol. 60, Vibration of Rotating Systems ASME 1993 pp. 121-128.

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