| 摘要 |
Height-adjustable support (10) for semi-trailers or the like, comprising a shaft tube body (13) mountable on a chassis of a semi-trailer, a slidable support inner tube (14) arranged in the shaft tube body (13), at whose lower end region a foot (15) is mounted and which is connected by means of a nut (17) located on a spindle (16) which is drivable by means of a transmission, wherein the transmission has a switchable spur gear region and bevel gear assemblies, wherein a switching region of the transmission is formed from a low-gear pinion (26) and a fast-gear gearwheel (28) which are attributed to a crank drive (25), as well as a low-gear gearwheel (22) and a fast-gear pinion (24a), to which alternatively by means of clutch coupling elements power is transmitted from the crank drive (25) via the low-gear pinion (26) to the low-gear gearwheel (22) or from the crank drive (25) via the fast-gear gearwheel (28) to the fast-gear pinion (24a), and wherein on an output shaft (12) a tab drive unit (24) is supported in a rotatable manner, which tab drive unit (24) comprises the fast-gear pinion (24a) and a fast-gear bevel pinion (24b) which are connected to one another in an unrotatable manner by means of a connecting member (24c). |
