| 摘要 |
A spindle assembly provides orthogonal reference surfaces for receiving an annular mounting member for a memory disk assembly having corresponding orthogonal reference surfaces disposed about a central axis. A spindle having a central bore concentric with a central axis turns within a housing on widely spaced bearings. The spindle includes an annular reference surface perpendicular to the central axis and a conical surface concentric with the central axis. A segmented collet has an internal conical surface mating with the conical surface of the spindle as well as a cylindrical reference surface which is orthogonal to the first reference surface and concentric with the central axis. Pins transmit rotational force from the spindle to the collet, and a cage holds the collet against the spindle. A drawbar extends from the cage through the central bore of the spindle and controls movement of the cage, thereby allowing the disk assembly to be selectively engaged or disengaged. The assembly combines stable operation with economy and ease of manufacture.
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