Rotary spindle having a disk clamp bottom land facing and in contact with a shaft top land
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G11B-017/02
G11B-017/028
출원번호
US-0615339
(2015-02-05)
등록번호
US-9196292
(2015-11-24)
발명자
/ 주소
Nguyen, Diep L.
Ilagan, Ronald G.
Kloeppel, Klaus
출원인 / 주소
Western Digital Technologies, Inc.
인용정보
피인용 횟수 :
0인용 특허 :
319
초록▼
A rotary spindle has a rotatable shaft that defines a shaft axis of rotation, and has a shaft top land that is normal to the shaft axis of rotation. A disk mounting hub has an outer disk mounting surface, and has an inner cylindrical bore with an inner cylindrical surface that faces and is in radial
A rotary spindle has a rotatable shaft that defines a shaft axis of rotation, and has a shaft top land that is normal to the shaft axis of rotation. A disk mounting hub has an outer disk mounting surface, and has an inner cylindrical bore with an inner cylindrical surface that faces and is in radial compression with an outer cylindrical surface of the shaft at a cylindrical hub-to-shaft interface. The cylindrical hub-to-shaft interface is substantially concentric about the shaft axis of rotation. A disk clamp is fastened to the rotatable shaft, and the disk clamp has a clamp bottom land that faces and is in contact with the shaft top land.
대표청구항▼
1. A rotary spindle comprising: a rotatable shaft defining a shaft axis of rotation, and having a shaft top land normal to the shaft axis of rotation;a disk mounting hub having an outer disk mounting surface, and having an inner cylindrical surface that faces and is in press-fit radial compression w
1. A rotary spindle comprising: a rotatable shaft defining a shaft axis of rotation, and having a shaft top land normal to the shaft axis of rotation;a disk mounting hub having an outer disk mounting surface, and having an inner cylindrical surface that faces and is in press-fit radial compression with an outer cylindrical surface of the shaft at a cylindrical hub-to-shaft interface, the cylindrical hub-to-shaft interface being concentric about the shaft axis of rotation; anda disk clamp fastened to the rotatable shaft, the disk clamp having a clamp bottom land that faces and is in contact with the shaft top land, the disk clamp not having bottom contact with the disk mounting hub;wherein the hub-to-shaft interface includes at least one circumferential groove that contains an adhesive sealing material. 2. The rotary spindle of claim 1, wherein each of the shaft top land and the clamp bottom land is annular. 3. The rotary spindle of claim 1, wherein the shaft top land is adjacent to the hub-to-shaft interface. 4. The rotary spindle of claim 1, wherein the circumferential groove is in the inner cylindrical surface of the disk mounting hub. 5. The rotary spindle of claim 1, wherein the circumferential groove has a groove depth in the range of 100 microns to 200 microns. 6. The rotary spindle of claim 1, wherein the adhesive sealing material comprises a low halogen epoxy or a high temperature epoxy. 7. The rotary spindle of claim 1, wherein the clamp bottom land is parallel to the shaft top land. 8. The rotary spindle of claim 1, wherein the cylindrical hub-to-shaft interface has a diameter in the range of 2 mm to 6 mm. 9. A disk drive comprising: a disk;a disk drive base;a spindle rotatably attached to the disk drive base, the spindle comprising; a rotatable shaft defining a shaft axis of rotation, and having a shaft top land normal to the shaft axis of rotation;a disk mounting hub having an outer disk mounting surface supporting the disk, the disk mounting hub having an inner cylindrical surface that faces and is in press-fit radial compression with an outer cylindrical surface of the shaft at a cylindrical hub-to-shaft interface, the cylindrical hub-to-shaft interface being concentric about the shaft axis of rotation; anda disk clamp fastened to the rotatable shaft, the disk clamp having a clamp inner region that includes a clamp bottom land that faces and is in contact with the shaft top land, the disk clamp not having bottom contact with the disk mounting hub, the disk clamp including a clamp outer region that imparts an axial compressive preload force on the disk;the hub-to-shaft interface includes at least one circumferential groove that contains an adhesive sealing material. 10. The disk drive of claim 9, wherein each of the shaft top land and the clamp bottom land is annular. 11. The disk drive of claim 9, wherein the shaft top land is adjacent to the hub-to-shaft interface. 12. The disk drive of claim 9, wherein the circumferential groove is in the inner cylindrical surface of the disk mounting hub. 13. The disk drive of claim 9, wherein the circumferential groove has a groove depth in the range of 100 microns to 200 microns. 14. The disk drive of claim 9, wherein the cylindrical hub-to-shaft interface has a diameter in the range of 2 mm to 6 mm. 15. The disk drive of claim 9, wherein the clamp bottom land is parallel to the shaft top land. 16. The disk drive of claim 9, wherein the spindle further comprises a fixed bearing member for establishing a fluid bearing between the rotatable shaft and the fixed bearing member.
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이 특허에 인용된 특허 (319)
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