| 摘要 |
The invention relates to a valve drive with a motor (11), which acts upon an actuating bar (8) by means of a gear system (10, 12-14). The aim of the invention is to automatically adapt said above mentioned valve drive on to different valves. The gear system comprises: a clutch with two clutch sections (10, 14) which are engaged with each other by means of a toothing (17) and counter toothing (18) whereby, one of two said elements is displaced axially when a relative rotation of both clutch sections (10, 14) occurs; also comprising a switch (27), which is actuated by a displaceable element by means of a actuating arrangement (24). |
