Spindle motor for disk drive

Details Spindle motor for disk drive Spindle motor for disk drive

1996-08-06

1998-08-11

Cao, Allen

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 1702

Patent

active

057935670

ABSTRACT:
Disclosed is a spindle motor of drive system for driving a disk such as a hard disk. The spindle motor can prevent impurities from flowing thereinto and avoid contamination caused by dispersion of a lubricating oil such as grease filled in a bearing thereof. The spindle motor of the disk drive for reproducing or recording information from or onto a disk has a stator core installed on a shaft of a housing, bearings mounted on both lower and upper portions of the shaft, and a hub for mounting the disk. The hub has a magnet at an inner circumference thereof. The shaft has an air inlet opening which is transversely formed in the shaft and an air flow opening which is formed at a center of the shaft. The air flow opening is communicated with the air inlet opening at a right angle. A spiral sealing member is installed at a center of an upper portion of the hub. The spiral sealing member is formed at a bottom of a lead end thereof with a spiral portion, thereby preventing not only impurities from flowing into the spindle motor, but also the lubricating oil from dispersing out of the bearings by a spiral action of the spiral sealing member.

REFERENCES:
patent: 4726693 (1988-02-01), Anderson et al.
patent: 5491596 (1996-02-01), Kobori

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