[특허]Disk drive actuator rotary bearing attachment with cam member

Western Digital Technologies, Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Disk drive actuator rotary bearing attachment with cam member

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G11B-005/54
미국특허분류(USC)	360/265.2
출원번호	UP-0522084 (2006-09-15)
등록번호	US-7633722 (2009-12-24)
발명자 / 주소	Larson, Nils E. Liebman, Michael K. Garbarino, Jonathan M.
출원인 / 주소	Western Digital Technologies, Inc.
대리인 / 주소	Barcelo & Harrison, LLP
인용정보	피인용 횟수 : 51 인용 특허 : 39

초록
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A head stack assembly for use in a disk drive is provided that includes an actuator body, a rotary bearing, a sleeve, and a cam member. The actuator body is pivotable about an axis of rotation. The actuator body has an actuator bore that extends along the axis of rotation. The actuator bore includes an actuator bore surface. The sleeve is disposed between the rotary bearing and the actuator body and comprises a first surface that engages the actuator bore surface. The cam member has a second surface eccentric to said first surface. The second surface eng...

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What is claimed is: 1. A head stack assembly for use in a disk drive, the head stack assembly comprising: an actuator body pivotable about an axis of rotation, the actuator body having an actuator bore extending along the axis of rotation, the actuator bore including an actuator bore surface; a rotary bearing; a sleeve disposed between the rotary bearing and the actuator body, the sleeve comprising a first surface that engages the actuator bore surface; and a cam member comprising a second surface eccentric to said first surface, the second surface engaging the actuator bore surface, wherein the first surface includes a recess, the cam member comprises a cam ring including said second surface, the ring being movable in said recess relative to the sleeve. 2. The head stack assembly of claim 1, wherein the first surface comprises a geometric center that is approximately intersected by said axis of rotation and the recess comprises a substantially cylindrical surface that comprises a geometric center that is off-set from said axis of rotation. 3. The head stack assembly of claim 1, wherein the first surface comprises a geometric center that is approximately intersected by said axis of rotation and the recess has a non-circular arcuate perimeter. 4. The head stack assembly of claim 1, wherein the cam ring has a first end, a second end, an inside surface, an outside surface, an arcuate segment extending between the first and second ends, and a thickness extending between the inside and outside surfaces, the thickness varying along the arcuate segment. 5. The head stack assembly of claim 4, wherein the thickness of the cam ring increase along the arcuate segment from adjacent to at least one of the first and second ends toward the other of the first and second ends. 6. The head stack assembly of claim 1, wherein the cam ring comprises a protruding portion that extends radially farther from the axis of rotation than does the first surface. 7. The head stack assembly of claim 6, wherein the actuator bore surface has a substantially cylindrical portion and a notch adjacent thereto, the notch accepting the protruding portion of the cam ring. 8. The head stack assembly of claim 7, wherein the first surface of the sleeve comprises a first radius and the substantially cylindrical portion of the actuator bore surface comprises a second radius larger than the first radius, and wherein protruding portion of the cam ring has a first perimeter and the notch has a second perimeter that is larger than the first perimeter. 9. The head stack assembly of claim 7, wherein the notch is a first notch and further comprising a second notch spaced along a perimeter of the actuator bore from the first notch, the second notch engaging the first surface of the sleeve. 10. The head stack assembly of claim 1, wherein said actuator bore surface comprises a catch member engagable with said cam ring to limit relative rotation between the cam ring and the actuator bore surface. 11. The head stack assembly of claim 10, wherein the catch member protrudes from said actuator bore surface toward said axis of rotation. 12. A head stack assembly for use in a disk drive, the head stack assembly comprising: an actuator body pivotable about an axis of rotation, the actuator body having an actuator bore extending along the axis of rotation, the actuator bore including an actuator bore surface; a rotary bearing; a sleeve disposed between the rotary bearing and the actuator body, the sleeve comprising a first surface that engages the actuator bore surface; and a cam member comprising a second surface eccentric to said first surface, the second surface engaging the actuator bore surface, wherein said sleeve comprises a torquing feature on an end surface thereof. 13. A head stack assembly for use in a disk drive, the head stack assembly comprising: an actuator body pivotable about an axis of rotation, the actuator body having an actuator bore extending along the axis of rotation, the actuator bore including an actuator bore surface; a rotary bearing; a sleeve disposed between the rotary bearing and the actuator body, the sleeve comprising a first surface that engages the actuator bore surface; and a cam member comprising a second surface eccentric to said first surface, the second surface engaging the actuator bore surface, wherein the sleeve has a first rotational position relative to the actuator bore in which the sleeve is slidable relative to the actuator bore along the axis of rotation and a second rotational position relative to the actuator bore in which an increased friction prevents the sleeve from sliding relative to the actuator bore along the axis of rotation. 14. A head stack assembly for use in a disk drive, the head stack assembly comprising: an actuator body pivotable about an axis of rotation, the actuator body having an actuator bore extending along the axis of rotation, the actuator bore including an actuator bore surface; a rotary bearing; a sleeve disposed between the rotary bearing and the actuator body, the sleeve comprising a first surface that engages the actuator bore surface; and a cam member comprising a second surface eccentric to said first surface, the second surface engaging the actuator bore surface, wherein an angle at a point of engagement between the second surface and a tangent to a perimeter of the actuator bore is about 8 degrees or less. 15. A pivot bearing cartridge for facilitating rotary motion of a head-stack assembly in a disk drive, the pivot bearing cartridge comprising: a rotary bearing; and a pivot sleeve disposed about the rotary bearing and pivotable therewith about an axis of rotation extending axially through the pivot cartridge, the pivot sleeve comprising a first outside surface extending about the axis of rotation; and a cam disposed about at least a portion of the pivot sleeve, the cam having a second outside surface being eccentric to said first outside surface, wherein the first outside surface includes a recess, the cam comprises a ring movable in said recess relative to the pivot sleeve, the ring including said second outside surface. 16. The pivot bearing cartridge of claim 15, wherein the first outside surface comprises a geometric center that is approximately intersected by said axis of rotation and the recess comprises a substantially cylindrical surface that comprises a geometric center that is off-set from said axis of rotation. 17. The pivot bearing cartridge of claim 15, wherein the first outside surface comprises a geometric center that is approximately intersected by said axis of rotation and the recess has a non-circular arcuate perimeter. 18. The pivot bearing cartridge of claim 15, wherein the ring has a first end, a second end, an inside surface, an outside surface, an arcuate segment extending between the first and second ends, and a thickness extending between the inside and outside surfaces, the thickness varying along the arcuate segment. 19. The pivot bearing cartridge of claim 18, wherein the thickness of the ring increase along the arcuate segment from adjacent to at least one of the first and second ends toward the other of the first and second ends. 20. The pivot bearing cartridge of claim 15, wherein the ring comprises a protruding portion that extends radially farther from the axis of rotation than does the first outside surface. 21. A pivot bearing cartridge for facilitating rotary motion of a head-stack assembly in a disk drive, the pivot bearing cartridge comprising: a rotary bearing; and a pivot sleeve disposed about the rotary bearing and pivotable therewith about an axis of rotation extending axially through the pivot cartridge, the pivot sleeve comprising a first outside surface extending about the axis of rotation; and a cam disposed about at least a portion of the pivot sleeve, the cam having a second outside surface being eccentric to said first outside surface, wherein said pivot sleeve comprises a torquing feature on an end surface thereof.

이 특허에 인용된 특허 (39)

이 특허를 인용한 특허 피인용횟수: 51

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특허 상세정보

Disk drive actuator rotary bearing attachment with cam member

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이 특허에 인용된 특허 (39)

이 특허를 인용한 특허 피인용횟수: 51

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Disk drive actuator rotary bearing attachment with cam member

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이 특허에 인용된 특허 (39)

이 특허를 인용한 특허 피인용횟수: 51

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