Damping post for reducing acoustic noise in a disk drive

Details Damping post for reducing acoustic noise in a disk drive Damping post for reducing acoustic noise in a disk drive

1994-07-29

1997-01-28

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9801, G11B 3314

Patent

active

055983065

ABSTRACT:
Some disk drives produce a relatively large amount of acoustical noise. This noise is generated by vibrations of the disk drive cover caused by movement of the spindle motor and/or actuator head. A disk drive assembly is provided that significantly reduces the amount of acoustic noise emanating from a disk drive. An enclosure for a disk stack assembly, comprising at least one disk, mounted on a spindle attached to a motor and an actuator assembly, comprising at least one head attached to an actuator, is provided. The enclosure has an inner chamber with a post extending outwardly from a surface of the inner chamber. A compressible material is disposed at one end of the post abutting in a compressed state an opposing surface of the inner chamber. In a preferred embodiment, the post is integrally formed with the inner chamber and is unattached from the opposing surface. The damping post is preferably positioned in a position of maximum deflection for the vibration mode of the assembly. The damping post mass is such that the device enclosure frequencies are shifted away from source excitation forces improving the disk drive acoustic performance.

REFERENCES:
patent: 5021905 (1991-06-01), Sleger
patent: 5079655 (1992-01-01), Yagi
patent: 5214549 (1993-05-01), Baker et a l.
patent: 5235482 (1993-08-01), Schmitz
patent: 5272580 (1993-12-01), Hickox et al.
patent: 5282100 (1994-01-01), Tacklind et al.

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