IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0625692
(2012-09-24)
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등록번호 |
US-8824095
(2014-09-02)
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발명자
/ 주소 |
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출원인 / 주소 |
- Western Digital Technologies, Inc.
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인용정보 |
피인용 횟수 :
41 인용 특허 :
15 |
초록
▼
A spindle motor for a disk drive including a hub defining a longitudinal axis having a hub flange defining a mounting surface extending substantially normal to the longitudinal axis, wherein the hub flange of the hub extends longitudinally relative to the mounting surface to define a vertical surfac
A spindle motor for a disk drive including a hub defining a longitudinal axis having a hub flange defining a mounting surface extending substantially normal to the longitudinal axis, wherein the hub flange of the hub extends longitudinally relative to the mounting surface to define a vertical surface; and a motor base coupled to the hub proximate to the hub flange of the hub, the motor base having a central axis substantially aligned with the longitudinal axis, wherein the motor base extends longitudinally, wherein a radius of the motor base is greater than a radius of the hub flange of the hub.
대표청구항
▼
1. A spindle motor for a disk drive comprising: a rotor comprising a hub defining a longitudinal axis, said hub comprising:a hub flange defining a mounting surface extending substantially normal to the longitudinal axis,wherein the hub flange of the hub extends longitudinally relative to the mountin
1. A spindle motor for a disk drive comprising: a rotor comprising a hub defining a longitudinal axis, said hub comprising:a hub flange defining a mounting surface extending substantially normal to the longitudinal axis,wherein the hub flange of the hub extends longitudinally relative to the mounting surface to define a vertical surface, andwherein the hub flange of the hub has a shielding portion comprising: a horizontal shield extending from the vertical surface of the hub flange of the hub in a direction substantially normal to the longitudinal axis, anda vertical shield extending longitudinally relative to horizontal shielding portion of the hub; anda motor base coupled to the hub proximate to the shielding portion of the hub,the motor base having a central axis substantially aligned with the longitudinal axis,wherein the motor base extends longitudinally,wherein a radius of the shielding portion of the hub is greater than a radius of the hub flange of the hub. 2. The spindle motor according to claim 1, wherein the vertical surface of the hub flange of the hub has a longitudinal height equal to or greater than 1 mm. 3. The spindle motor according to claim 1, wherein the vertical surface of the hub flange of the hub has a longitudinal height sufficient to provide clearance or to allow access by a head to an undersurface of disk mounted on the mounting surface. 4. The spindle motor according to claim 1, wherein the rotor further comprises: a magnet disposed proximate to and radially inward of a radial wall of the rotor; andwherein the shielding portion of the hub forms a metallic shield to substantially prevent magnet flux from the magnet from being transmitted out of the rotor; andwherein the motor base further comprises a stator comprising at least one winding of wire disposed proximate to and radially inward of the rotor. 5. A disk drive including the spindle motor according to claim 1, the disk drive further including: a disk supported by the mounting surface of the hub flange of the hub; anda head operable to write to and read from the disk,wherein the vertical surface of the hub flange of the hub has a longitudinal height greater than a longitudinal height of the head to provide clearance between the disk and the shielding portion of the hub or to allow the head to access an undersurface of the disk. 6. A method of manufacturing a disk drive, the method comprising: providing a hub defining a mounting surface and a vertical surface, a disk and a motor base having a radius greater than a radius of the hub;positioning the motor base proximate to the hub;coupling the motor base to the hub;positioning the disk proximate to the mounting surface of the hub such that the hub is disposed between the motor base and the disk; andcoupling the disk to the hub. 7. The method of claim 6, wherein positioning the disk proximate to the mounting surface of the hub comprises positioning the disk such that the vertical surface of the hub forms a space between the disk and the motor base, the space having a height sufficient to provides a clearance or to allow access by a head to an undersurface of the disk coupled to the hub. 8. A method of manufacturing a disk drive, the method comprising: providing a rotor comprising a hub defining a mounting surface and a vertical surface, a disk and a motor base, wherein a notch having a radius less than the radius of motor base is formed in the vertical surface of the hub;positioning the motor base proximate to the hub;coupling the motor base to the hubpositioning the disk proximate to the mounting surface of the hub such that the hub is disposed between the motor base and the disk; andcoupling the disk to the hub. 9. The method of claim 8, wherein positioning the disk proximate to the mounting surface of the hub comprises positioning the disk such that the notch of the hub provides a space between the disk and the motor base, the space having a height sufficient to provide a clearance or to allow access by a head to an undersurface of the disk coupled to the hub. 10. A method of manufacturing a disk drive, the method comprising: providing a rotor comprising a hub defining a horizontal surface, a disk, a motor base, and a spacer defining a mounting surface and a lower surface on a side of the spacer opposite the mounting surface, wherein a radius formed at the spacer is less than the radius of the motor base;positioning the motor base proximate to the hub;coupling the motor base to the hub;positioning the lower surface of the spacer proximate to the horizontal surface of the hub, such that the hub is disposed between the motor base and the spacer;coupling the spacer to the hub;positioning the disk proximate to the mounting surface of the spacer such that the spacer is disposed between the hub and the disk; andcoupling the disk to the spacer. 11. The method of claim 10, wherein positioning the disk proximate to the mounting surface of the spacer comprises positioning the disk such that the spacer provides a space between the disk and the motor base, the space having a height sufficient to provide a clearance or to allow access by a head to an undersurface of the disk coupled to the spacer. 12. A method of manufacturing a disk drive, the method comprising: providing a disk, a motor base and a rotor comprising a hub defining a mounting surface, and a vertical surface, the hub comprising a shielding portion disposed proximate to the vertical surface, the shielding portion of the hub having a radius greater than a radius of the vertical surface;positioning the motor base proximate to the hub such that the shielding portion of the hub is disposed between the motor base and vertical surface;coupling the motor base to the hub;positioning the disk proximate to the mounting surface of the hub such that the vertical surface is disposed between the shielding portion of the hub and the disk; andcoupling the disk to the hub. 13. The method of claim 12, wherein positioning the disk proximate to the mounting surface of the hub comprises positioning the disk such that that the vertical surface of the hub provides a space between the disk and the shielding portion, the space having a height sufficient to provide clearance or to allow access by a head to an undersurface of the disk coupled to the hub.
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