| 摘要 |
In a diagnostic system, having a rotating gantry ( 24 ) and a stationary gantry ( 22 ), a bearing race ( 50 ) rotates with surface portions having varying linear velocities in accordance with distance from an axis (A) of rotation. Tapered roller bearings ( 46 ) interface the bearing race ( 50 ) and are conically shaped to velocity match the variable linear surface velocity race ( 50 ). The race ( 50 ) preferably includes two faces, which provide both axial and radial supporting surfaces for the bearings ( 46 ) to interface. The bearings ( 46 ) are disposed about the race ( 50 ) in pairs. A drive motor ( 52 ) is connected to one of the bearings ( 46 ) to rotate the gantry ( 24 ).
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