초록 ▼

A disk storage drive for a disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and further includes a shaft aligned with the rotation axis of said motor, and a m

A disk storage drive for a disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and further includes a shaft aligned with the rotation axis of said motor, and a magnetically conducting member supported for rotation about the rotation axis and having an inner wall coaxially surrounding the stator. A magnet fixed to the inner wall of the magnetically conducting member is radially spaced from the stator. The disk storage device further includes a hub positioned within the clean chamber and contiguous with the magnetically conducting member so that the hub and the magnetically conducting member together form an outer rotor of the drive motor. The outer rotor has a radially extending flange having a surface which supports said storage disk. A support member contiguous with a portion of a partition of the clean chamber supports the shaft and has a recess receiving a portion of said radially extending flange, whereby the spacing between opposing walls of the clean chamber is reduced. Further, the magnetically conducting member comprises magnetic shield means at least peripherally surrounding the stator and at one end radially extending to the bearing and shaft assembly, and the rotor has a radially extending inner wall spaced closely adjacent to said stator windings, whereby said disk storage device is compact in a direction along said disk rotation axis while said motor magnet is axially separated from the plane of said storage disk.

대표청구항 ▼

[ What is claimed is:] [1.] A spin motor for rotating a storage disk in a disk storage device, comprising:a stator and a winding on said stator;an external rotor coaxially surrounding said stator and spaced therefrom by a substantially cylindrical air gap, said rotor having a permanent magnetic roto

[ What is claimed is:] [1.] A spin motor for rotating a storage disk in a disk storage device, comprising:a stator and a winding on said stator;an external rotor coaxially surrounding said stator and spaced therefrom by a substantially cylindrical air gap, said rotor having a permanent magnetic rotor magnet and a soft magnetic yoke, and a hub concentric to said yoke, said hub being connected to the rotor for rotation therewith and having a cylindrical disk support portion which can pass through a central opening of a storage disk for receiving at least one storage disk, said hub having an outwardly radially projecting flange at one axial extremity of said rotor; anda support member contiguous with the disk storage device for supporting said stator, said support member including a radially extending flange adjacent said axial extremity of said rotor, said support member flange having a recess cooperating with said outwardly radially projecting flange of said hub to allow said outwardly radially projecting flange to nest in said recess, thereby making the motor more compact.