目前,在国内外的中小型汽车起重机中,一旦通用汽车底盘桥负荷能力不能满足起重和行驶特性要求时,通常是接长并加固车架梁,增加从动桥,并将中后桥实行双桥平衡悬挂,变通用汽车底盘为起重机专用底盘,以提高桥的负荷能力,扩大起重机品种。改装后的中后桥平衡悬挂机构,与大型专用底盘的悬挂机构一样,对行驶的平衡性起着重要作用。 At present, at home and abroad small and medium sized truck crane, once the GM chassis bridge load capacity can not meet the lifting and driving characteristics of the requirements, it is usually longer and strengthen the frame beam, increase the driven bridge, and the implementation of the bridge Shuangqiaobalanced suspension, change GM chassis for the crane chassis, in order to improve the load capacity of the bridge, to expand the variety of cranes. After the modification of the balance bridge in the rear suspension mechanism, and large dedicated suspension chassis, as the balance of driving plays an important role.