| 摘要 |
Two drive motors (2, 3) are connected via a common gear to two output pinions (4, 5) engaging into the toothed ring of the turret. The common gear is composed of two planetary gears (6, 7) which are so connected in series that the web (6.4) of the first planetary gear (6) is connected via a shift coupling (10) to the sun wheel (7.1) of the second planetary gear (7). The first drive motor (2) drives the sun wheel (6.1) and the second drive motor (3) drives the hollow wheel (6.3) of the first planetary gear (6). The first output pinion (4) is connected to the hollow wheel (7.3) and the second output pinion (5) is connected to the web (7.4) of the second planetary gear (7). The interposition of further gearwheel mechanisms (8.1-8.2, 9, 11.1-11.2, 12) ensures that the reduction ratio from the first drive motor (2) to the first output pinion (4) is equal to the reduction ratio from the second drive motor (3) to the second output pinion (5). The first planetary gear (6) acts as a summing gear for the two drive motors (2, 3) and the second planetary gear (7) acts as a differential gear for the two output pinions (4, 5). In this way, tolerance-related irregularities in drive and output are compensated and work can be carried out with very little play in the rotary connection. <IMAGE> |
