Trailer crane has crane unit and wheel pairs cooperating with spring axles over rocker arms, where one wheel pair is changed in its relative position to roadway over pivot points of associated spring axles by adjusting devices

摘要

The trailer crane has a crane unit arranged on a chassis and carriage with two consecutively arranged rigid axles. The carriage is placed below the chassis and the rigid axles are provided with wheel pairs (22,23). The trailer crane also comprises a towing bar attached to the chassis and a supporting wheel. The wheel pairs cooperate with spring axles (7,8) over rocker arms (19,20). One of the wheel pairs are changed in their relative position to roadway (4) over pivot points (9,10) of the associated spring axles by an adjusting device (21) arranged between the wheel pairs. An independent claim is included for a method for relative position change of a wheel pair of a trailer crane with adjusting devices.