Pivot bearing cartridge including central pivot element and ball bearing set
AssigneeWestern Digital Technologies, Inc.
InventorKamran Oveyssi
Life of this patent
Estimating the term…
Abstract
A pivot bearing cartridge for use in a head stack assembly. The pivot bearing cartridge includes a pivot shaft including a shaft body and a shaft distal end. The pivot bearing cartridge further includes a cap disposed about the pivot shaft. The cap includes a cap annular body and a cap closed end. The pivot bearing cartridge further includes a ball bearing set in mechanical communication with the pivot shaft and the cap annular body. The pivot bearing cartridge further includes a central pivot element disposed between and in mechanical communication with the shaft distal end and the cap closed end for facilitating rotation of the cap relative to the pivot shaft.
Claims14
A pivot bearing cartridge for use in a head stack assembly, the pivot bearing cartridge comprising:
- a pivot shaft including a shaft body and a shaft distal end;
- a cap disposed about the pivot shaft, the cap including a cap annular body and a cap closed end;
- a single ball bearing set in mechanical communication with the pivot shaft and the cap annular body;
- and
- a single central pivot element disposed between and in mechanical communication with the shaft distal end and the cap closed end for facilitating rotation of the cap relative to the pivot shaft;
- wherein the pivot shaft includes a shaft distal end insert attached to the pivot shaft adjacent the shaft distal end, the shaft distal end insert is formed to move along a longitudinal axis of the pivot shaft and biased against the central pivot element, the pivot shaft includes a spring in mechanical communication with the shaft body and the shaft distal end insert for biasing the shaft distal end insert against the central pivot element.
A disk drive comprising:
- a disk drive base;
- a head stack assembly rotatably coupled to the disk drive base and including:
- an actuator body defining a bore;
- a pivot bearing cartridge positioned in the bore and coupled to the disk drive base for allowing the head stack assembly to pivot relative to the disk drive base, the pivot bearing cartridge including:
- a pivot shaft coupled to the disk drive base and including a shaft body and a shaft distal end;
- a cap disposed about the pivot shaft, the cap including a cap annular body and a cap closed end;
- a single ball bearing set in mechanical communication with the pivot shaft and the cap annular body;
- and
- a single central pivot element disposed between and in mechanical communication with the shaft distal end and the cap closed end for facilitating rotation of the cap relative to the pivot shaft;
- wherein the pivot shaft includes a shaft distal end insert attached to the pivot shaft adjacent the shaft distal end, the shaft distal end insert is formed to move along a longitudinal axis of the pivot shaft and biased against the central pivot element, the pivot shaft includes a spring in mechanical communication with the shaft body and the shaft distal end insert for biasing the shaft distal end insert against the central pivot element.
Dependencies are inferred from the claim text.