Crane e.g. truck crane has hydraulic unit that is provided with cylinder which is set with piston rod driven in telescopic mast system, and free end of piston rod that is provided with drive unit to support deflection rollers

摘要

The crane has telescopic profiles (14,15,17) that are converted from parking position into work position by a hydraulic unit (2) and are returned back by transfer elements (6,11). The hydraulic unit is provided within a guide support portion (16) which is positioned below telescopic profiles having welding structure. The hydraulic unit is provided with a cylinder (3) that is set with a piston rod (4) which is driven in telescopic mast system (1). The free end of piston rod is provided with drive unit (9) to support deflection rollers (5,10).