Patent ID: 6344946
Filing Date: 2002-02-05
Classification: G11B,H02K

Abstract:
A disk storage device, comprising:a housing having walls enclosing a clean room chamber; at least one data storage disk located in said clean room chamber; a read head positioned to cooperate with a surface on said at least one data storage disk to read data recorded thereon; and a motor for rotating said at least one data storage disk, said motor including: a hub for receiving said data storage disk; a shaft attached to said hub for rotation therewith; a bearing system including a cylindrical support member and first and second axially spaced bearings for rotatably supporting said shaft and hub, wherein said cylindrical support member is supported on a wall of said housing and has a first portion projecting from said wall into said clean room chamber and a second portion, coaxial with said first portion, projecting from said wall away from said clean room chamber, wherein said first portion and said second portion project approximately the same distance, and wherein at least a portion of said second axially spaced bearing is in a plane coincident with a wall portion of the housing; a rotor having a cylindrical surface and fixed to said shaft at an end thereof opposite said hub; an annular permanent magnet mounted on the cylindrical surface of said rotor; and a stator including a winding, said stator being affixed to a wall of said housing and surrounding said annular permanent magnet so as to be spaced therefrom by a cylindrically-shaped air gap, whereby magnetic flux generated by said stator interacts with said permanent magnet to apply a rotary driving force to said rotor, shaft and hub.