Spindle motor having an increased magnet diameter above head plane
AssigneeWestern Digital Technologies, Inc.
InventorMitchell D. Dougherty
Life of this patent
Estimating the term…
Abstract
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.
Claims13
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, and
- wherein 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, and
- a vertical shield extending longitudinally relative to horizontal shielding portion of the hub;
- and
- a 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.
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;
- and
- coupling the disk to the hub.
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 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;
- and
- coupling the disk to the hub.
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;
- and
- coupling the disk to the spacer.
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;
- and
- coupling the disk to the hub.
Dependencies are inferred from the claim text.