| 摘要 |
A digital storage system of the Winchester or hard disk drive type has a magnetic head positioner within which the arm-positioning body, including the heads, is rotatably mounted about a fixed stator assembly which includes a two-part shaft assembly comprising an aluminum cylindrical sleeve thermally shrink fitted about the central portion of an aluminum shaft having a pair of fixed ends and end portions reduced in diameter relative to the central portion by means of a pair of steel bearing assemblies attaching circumferentially about the sleeve in regions exclusive of the shrink fitted central portion of the shaft assembly. The clearance thus provided between the shaft and the mounting sleeve in the regions of the bearing assembly attachment permits a degree of decoupling of mechanical resonances potentially introduced into the head position servocontrol loop by mounting stresses acting upon the shaft. |
