Tuned damper for disk drive actuator arm
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsMiguel Dominguez, Fu-Ying Huang, Jeffrey Alan Kerner, Hatem Radwan
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Abstract
Embodiments of the present invention include a disk drive actuator arm for reducing amplitude of vibration modes substantially planar to a disk surface. The actuator arm comprises a plurality of head arms coupled to the actuator arm, the head arms substantially equally spaced and substantially parallel to each other. The actuator arm further includes a damping material bonded to a surface of one of the plurality of head arms, wherein the surface is substantially parallel to the plurality of head arms. The actuator arm further includes a mass bonded to the damping material wherein the mass dampens the amplitude of vibration modes substantially planar to the disk surface.
Claims19
A disk drive actuator arm for reducing amplitude of vibration modes substantially planar to a disk surface, said actuator arm comprising:
- a plurality of head arms coupled to said actuator arm, said head arms substantially equally spaced and substantially parallel to each other;
- a damping material bonded to a surface of one of said plurality of head arms, said surface substantially parallel to said plurality of head arms;
- and
- a mass bonded to said damping material wherein said mass dampens said amplitude of said vibration mode substantially planar to said disk surface wherein said mass is bonded to said head arm at a location where said amplitude of said vibration mode is substantially largest.
A device for reducing amplitude of a vibration mode of a disk drive actuator arm comprising:
- a stiff metallic mass with a thickness greater than 0.15 mm;
- and
- a damping material bonded to said metallic mass for bonding said metallic mass to a surface of one of a plurality of head arms coupled to said disk drive actuator arm, said surface being substantially parallel to said plurality of head arms wherein said mass is bonded at a location where said amplitude of said vibration mode is substantially largest.
A substantially symmetric actuator arm assembly comprising:
- a plurality of substantially parallel actuator arms, each of said plurality of actuator arms comprising a bottom surface and a top surface wherein said bottom surfaces and said top surfaces are designed to be substantially parallel to a data storage disk;
- and
- a plurality of masses bonded to two or more of said plurality of substantially parallel actuator arms, said masses bonded by a damping material wherein one of said plurality of masses is bonded to one of said actuator arms at a location where said amplitude of said vibration mode is substantially largest.
Dependencies are inferred from the claim text.