Lanka telescopica for a motor vehicle or a crane.

摘要

At least one of the tractive device pairs(6,7) is lift adjustable relatively to the other pair via a positioning drive(8) supporting on the cross yoke(5). The positioning drive is a lift cylinder, to which engages the lift-adjustable tractive device running over a deflector roller at the cross-yoke end. Alternatively, the positioning drive can be a screw gear with a gear spin which is rotatable and drivable.