| 摘要 |
<p>The spindle (2), which is both rotated and advanced axially, consists of a fixed assembly (1) with a drive to advance the spindle, and a mobile assembly (3) with a drive to rotate it, capable of being actuated by the advance mechanism. The advancing movement of the spindle is controlled by a motor (4) mounted on the fixed assembly's support (5) and able to rotate in either direction on an endless screw 6) turning in two bearings (7,8) on the support. The rotary motion is provided by a motor (14) mounted on a plate (15) on the mobile assembly, which also carried the spindle itself. The plate (15) is mounted on the endless screw by a recirculating ball nut (16) set in a recess in the support, with the coupling between the motor and spindle provided by a toothed belt (19).</p> |
