发明名称 |
Disk drive spindle hub assembly |
摘要 |
A disk drive for magnetic data storage media includes a spindle bearing arrangement having a rotatable portion surrounding and mounted by bearings on a stationary portion. A spindle hub having a cylindrical outer surface and a concentric interior cavity is rigidly attached to the rotatable portion of the spindle bearing arrangement. The cylindrical outer surface of the spindle hub provides a mounting surface for a stack of storage disks. A brushless direct current motor is mounted within the hub cavity. The rotor of the motor includes a sleeve rigidly attached to the floor of the spindle hub cavity and providing a return flux path for the motor. The spindle hub and the sleeve have distinct coefficients of thermal expansion and a radial spacing between the sleeve and the spindle hub allows for unconstrained thermal expansion of the sleeve and the spindle hub. The hub cavity floor incorporates a concentric annulus for accurate centering of the sleeve within the cavity.
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申请公布号 |
US5148338(A) |
申请公布日期 |
1992.09.15 |
申请号 |
US19900612768 |
申请日期 |
1990.11.14 |
申请人 |
DIGITAL EQUIPMENT CORPORATION |
发明人 |
FRUGE, TAVE J. |
分类号 |
G11B17/038;G11B19/20;G11B25/04;G11B33/14;H02K7/14 |
主分类号 |
G11B17/038 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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