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轮式起重机因其机动灵活、操纵方便、效率高、作业工况适应性广等优点而被广泛采用。在轮式起重机应用过程中,自重是限制起升能力的重要因素,而吊臂作为主要受力部件,通常占整机重量的13%～20%。因此,吊臂的性能对于起重机在大幅度、高起升高度下性能的影响非常重要。早期的轮式起重机大多采用机械传动结构的桁架式吊臂,随着20世纪60年代中期液压技术的发展,液压伸缩臂轮式起重机得到快速发展,到20世纪80年代末,中小吨位轮式起重机几乎全部采用液
Wheel cranes are widely used because of their flexibility, convenient operation, high efficiency and wide adaptability to working conditions. In the application of wheeled cranes, self-weight is an important factor limiting the lifting capacity, and the boom as the main force component, usually accounts for 13% ~ 20% of the weight of the whole machine. Therefore, the boom performance is very important for the crane’s performance at large, high lifting height. Most of the early wheeled cranes used truss-type boom with mechanical transmission structure. With the development of hydraulic technology in the mid-1960s, the hydraulic telescopic boom wheeled crane developed rapidly. By the late 1980s, small and medium tonnage wheeled cranes Almost all liquid