Mobile telescopic crane

摘要

A mobile telescopic crane has a telescopic jib with at least three part-jibs. Each of the part-jibs is constructed from at least two part-jib portions so as to be telescopic in a longitudinal direction. Part-jib portions arranged at a spacing from one another transverse to the longitudinal direction each form a jib portion with at least one flexurally rigid connecting element. Respective adjacent jib portions are mechanically lockable with respect to one another in the longitudinal direction. A construction of this type of the jib means that an increase in the bearing load is easily achieved by increasing the area moment of inertia of the jib.

主权项

1. A mobile telescopic crane comprising:
a movable undercarriage,
a superstructure rotatably arranged on the undercarriage,a jib mounted on the superstructure wherein the jib is telescopic in a longitudinal direction, and is pivotable in a luffing plane, wherein the telescopic jib has at least three part-jibs, wherein each of the at least three part-jibs is constructed from at least two part-jib portions that are telescopic in the longitudinal direction, wherein the part-jib portions are arranged at a spacing from one another transverse to the longitudinal direction to form a jib portion with at least one rigid connecting element, wherein respective adjacent jib portions are mechanically lockable with respect to one another in the longitudinal direction, wherein the jib has three part-jibs which are arranged triangularly and symmetrically with respect to the luffing plane, and wherein one part-jib of the three part-jibs is arranged in the luffing plane and has a larger part-cross-sectional area than the other part-jibs.