Hydrodynamic bearing device and a recording disk drive equipped with it
A technology of dynamic pressure bearings and bearings, which is applied in the direction of sliding contact bearings, rotating bearings, recording information on disks, etc., and can solve the problem of damage, difficulty in bearing rigidity, and large pressure difference between the two ends of the inclined bearing space, etc. question
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[0062] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Prior to this, the outline of a spindle motor for a hard disk drive (HDD) having a dynamic pressure bearing device to which the present invention is applied will be described.
[0063] figure 1 The overall structure of the shaft / outer rotor type spindle motor shown includes a stator group 10 as a fixed side member and a rotor group 20 as a rotation side member mounted relative to the stator group from the upper side shown in the figure.
[0064] The stator assembly 10 therein has a base frame 11 fixed to a main board (not shown) of a hard disk drive (HDD) by screws. On the inner peripheral side of the cylindrical sleeve holder (bearing member holder) 12 formed in the substantially central portion of the base frame 11, the hollow sleeve 13 is connected to the base by means of a fixing device such as press fitting or shrink fit. The frame 11 is joined as one. ...
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