| 摘要 |
<p>Height-adjustable support has a toothed wheel control mechanism (22,23) for alternatively operating the support (10) for the hand drive and a motor is provided for force operation. A motor drive has a motor with a pinion and driven journal of motor possess pinion of appropriate teeth which intervene in the placed toothed wheel, which is rotationally fixed on the transmission output shaft. Pinion of motor of driven journal can also intervene in the spur cut space present at the bevel pinion.</p> |
