Telescopic jib for a motor vehicle or a crane

摘要

A telescopic boom ( 1 ) for a vehicle ( 25 ) or a hoist with a storage rack ( 6 ) for at least two box girders ( 2, 3 ) guided displaceably in one another in the direction of their longitudinal axes, which are mounted to pivot about a horizontal pivot axle ( 5 ) in the storage rack ( 6 ) and which can be displaced reciprocally by means of a servo-drive ( 19 ) is described. In order to create advantageous structural conditions it is proposed that the longitudinal axles of the box girders ( 2, 3 ) form an upwards arched arc of a circle ( 4 ) which runs concentrically to a common axis parallel to the pivot axis ( 5 ).