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A disk drive includes a disk drive base, a spindle motor, a first disk and a disk clamp. The rotary hub of the spindle motor includes a generally cylindrically-shaped hub wall and a hub flange including an inner annular surface adjacent to the hub wall, an outer annular surface and a flange land por

A disk drive includes a disk drive base, a spindle motor, a first disk and a disk clamp. The rotary hub of the spindle motor includes a generally cylindrically-shaped hub wall and a hub flange including an inner annular surface adjacent to the hub wall, an outer annular surface and a flange land portion integrally formed with the hub flange. The land portion is positioned between the annular surfaces and defines a disk contact surface projecting above the annular surfaces, the disk contact surface being substantially centered on the hub flange. The first disk is supported by the disk contact surface to form a clearance between the annular surfaces and the first disk. A second disk may be coupled to the spindle motor and an annular disk spacer may be positioned between the disks. The annular disk spacer includes a first spacer surface facing the first disk and a second spacer surface facing the second disk. The first and second spacer surfaces each comprise an inner annular spacer surface adjacent to the hub wall, an outer annular spacer and a spacer land portion integrally formed with the spacer and positioned between the annular spacer surfaces to define a spacer-to-disk contact surface that projects from the annular spacer surfaces to form a clearance between a respective disk and respective annular surfaces. The disk clamp for applies a clamping force to the first and second disks that is substantially centered on each spacer-to-disk contact surface and on the disk contact surface.

대표청구항 ▼

[We claim:] [1.]a disk drive base;a spindle motor attached to the disk drive base, the spindle motor comprising:a motor base;a shaft coupled to the motor base;a rotary hub surrounding the shaft, the rotary hub comprising:a generally cylindrically-shaped hub wall;a hub flange comprising:an inner annu

[We claim:] [1.]a disk drive base;a spindle motor attached to the disk drive base, the spindle motor comprising:a motor base;a shaft coupled to the motor base;a rotary hub surrounding the shaft, the rotary hub comprising:a generally cylindrically-shaped hub wall;a hub flange comprising:an inner annular surface adjacent to the hub wall;an outer annular surface spaced-apart radially from the inner annular surface;a flange land portion integrally formed with the hub flange, the land portion positioned between the annular surfaces and defining a disk contact surface projecting above the annular surfaces, the disk contact surface being substantially centered on the hub flange;a first disk supported by the disk contact surface to form a clearance between the annular surfaces and the first disk;a disk clamp for applying a clamping force to the first disk, the clamping force being substantially centered on the disk contact surface;a second disk; andan annular disk spacer to separate the first disk from the second disk, the disk spacer comprising:a first spacer surface facing the first disk,a second spacer surface spaced-apart from the first spacer surface and facing the second disk, the first and second spacer surfaces each comprising:an inner annular spacer surface adjacent to the hub wall;an outer annular spacer surface spaced-apart radially from the inner annular spacer surface;a spacer land portion integrally formed with the disk spacer, the spacer land portion positioned between the annular spacer surfaces and defining a spacer-to-disk contact surface, the spacer-to-disk contact surface being substantially centered relative to the disk contact surface and projecting from the annular spacer surfaces to form a clearance between a respective disk and respective annular spacer surfaces.