| 摘要 |
<p>The drive comprises a machining spindle (2) turning in the spindle housing (1) and a motor (3). At the forward end of the spindle is a chuck for a tool or tool holder. The rotor (5) of the motor turns on the spindle, to which it is coupled by a gear train (8), which can be at the rear spindle end and consist of a change-speed gearbox. It can typically be epicyclic, with a sun-wheel (9), planetary pinions (11) on a carrier (10), and an annulus (12). The sun-wheel forms a hollow shaft and is coupled to the rotor. The annulus with planetary pinions and carrier can slide axially between two positions. In the first, the sun-wheel meshes with the pinions and the carrier is coupled to the machining spindle. In the second, the sun-wheel is disengaged from the pinions and coupled directly to the machining spindle.</p> |
