①在一定的中心距下，允许安装较大直径的液压缸，从而可减少液压缸数量，并且结构简单，维修量少；
① under a certain center distance, it is allowed to install a larger diameter hydraulic cylinder, so as to reduce the number of hydraulic cylinders, and the structure is simple with less maintenance;
②上横梁受力合理，所需的断面模量远比住式的小，可以减轻重量；
② the upper crossbeam has reasonable stress, the required section modulus is much smaller than that of the housing type, and the weight can be reduced;
③制造安装简单，管路配置隐蔽，整机外形整齐美观。
③ simple manufacturing and installation, concealed pipeline configuration, neat and beautiful appearance of the whole machine.