Data storage device with reduced rotor inertia
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United States of America Patent
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Jul 5, 2005
Grant Date -
Sep 9, 2004
app pub date -
Mar 7, 2003
filing date -
Mar 7, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A data storage device (10) includes a housing enclosing a clean room chamber (CR), a stator (20), a rotor (40), and a plurality of data storage disks (60). The housing includes an upper partition (12) and a lower partition (14). The stator includes a plurality of stator laminations (22) each having a winding (24) wound therearound, and a shaft (30) having opposite ends fixed with the upper partition and the lower partition. The rotor includes a hub (44), a tube (42) fixed in the hub, and a magnet (46) surrounded by the stator laminations. The hub includes a radially extending shoulder (45) for supporting the disks thereon. The tube surrounds the shaft, with a pair of bearings (50) rotatably connecting the tube to the shaft. A clamp (80) is secured on the hub, and presses on a top one of the disks to mount the disks to the hub.
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