Patent ID: 9745177
Date: 2017-08-29
CPC Classifications: B62D,B66C

Claim:
1. A crawler crane comprising: two crawler supports having rotating crawlers, at least one transversal bridge connecting the two crawler supports, a crane structure having at least one crane boom connected to the transversal bridge, a pivot articulation that pivotally connects the transversal bridge to the crane structure, wherein at least one of the crawler supports is connected to the transversal bridge via a double link comprising: a lower link that is articulated on the crawler support via a crawler support lower pivot shaft and on the transversal bridge via a transversal bridge lower pivot shaft, an upper link that is articulated on the crawler support via a crawler support upper pivot shaft and on the transversal bridge via a transversal bridge upper pivot shaft, and an adjustment drive for pivotally displacing at least one of the upper and lower links about at least one of the pivot shafts with which said link is articulated to the crawler support and the transversal bridge, said adjustment drive being directly connected to and providing leverage to the at least one of the upper and lower links, wherein said double link controls compensation of a roll inclination of the crawler support about an axis longitudinal to a driving direction defined by the two crawler supports, wherein the mutual distance between the crawler support lower pivot shaft and the transversal bridge lower pivot shaft is virtually equal but unequal to the mutual distance between the crawler support upper pivot shaft and the transversal bridge upper pivot shaft, wherein the crawler crane further comprises a control device that is in signal connection with the at least one adjustment drive, wherein the crawler crane further comprises an inclination sensor that is in signal connection with the control device, wherein the crawler crane further comprises a regulating module that is in signal connection with the control device and with the inclination sensor and provides to the control device positioning signals for adjusting an adjustment motor in such a way that if the roll inclination of the crawler support is present, the vertical axis of the crane structure assumes a minimal angle relative to the vertical.