| 摘要 |
<p>A machine tool includes a carrier (26) supporting a plurality of rotary spindles (22) each carrying a chuck for holding a workpiece (24). The carrier can be indexed to move the spindles between different stations (ST 1- ST 4). In one aspect of the invention, individual drive motors (28) are provided. The drive motors remain stationary while the carrier (26) is indexed and clutches (30) are provided to couple each drive motor to a spindle to be driven. In another aspect of the invention, the carrier (26) includes a central shaft (42) supported at its ends on bearings (72,78) and spindles (22) are coupled to the shaft by supports (44,46,48).</p> |
