BigPatents India

The invention relates to a height-adjustable support for semitrailers, having a stationary outer support tube, an inner support tube, which is arranged in a longitudinally displaceable manner therein, and a gearbox output shaft, on which are seated in a rotationally fixed manner a gearwheel and a likewise rotationally fixed bevel pinion, the bevel pinion belonging to a spindle drive via which the inner support tube is moved when the said gearwheel is driven alternately via a motor-drive pinion or a manual-drive pinion, or no manual-drive pinion for driving the gearwheel being present above the gearbox output shaft. A motor (29) which is arranged horizontally, transversely and/or laterally above the axis of the spindle (17) is installed in the support (10) and a pinion (20) is seated on its shaft. The shaft journal of the motor (29) has a toothing formation which is adequate for the pinion (30) . This toothing formation is in sole engagement with the gearwheel (28) or, as an alternative in some cases, the manual-drive pinion of a known manual-drive mechanism drives the gearwheel 28. Provided in the support (10) is a switch-off device which automatically stops the motor (29) when the support foot (15) has been positioned on the ground. (FIG.1)