| 摘要 |
A height adjustable support comprising a stationary outer support tube, an inner support tube arranged in a longitudinally displaceable manner in the outer support tube, a gearbox output shaft mounted for rotational movement in the outer support tube, a bevel gear fixed to the gearbox output shaft, a spindle drive engaged with the bevel gear for displacing the inner support tube within the outer support tube, a gearwheel fixed to the gearbox output shaft and engaging a pinion of a drive motor, for driving the gearwheel, the gearbox output shaft, the bevel gear and the spindle drive for moving the inner support tube, and a switch off device which deactivates the drive motor when an end of the inner support tube abuts a surface.
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