液压传动以其诸多优点在升降台机械中得到广泛应用 ,基本上与机械传动平分天下 ,但其也存在着一定的缺点。大型升降舞台一般采用双剪叉撑、双缸顶升的方式 ,这样就存在以下几个问题 :１、双缸同步问题 ;２、剪叉低角度启动力矩大 ,需要功率储备大 ,如不使用剪叉撑结构而使用多 Hydraulic transmission with its many advantages in the lifting platform machinery has been widely used, basically the same with the mechanical transmission world, but it also has some shortcomings. Large lifting stage generally double-prong forklift, twin jacking way, so there are several problems: 1, twin synchronization; 2, scissor low-angle starting torque, the need for large power reserve, if not used Scissors structure and use more