轮式挖掘机作业时,需在两侧装液压支腿,以便使轮轴减载,工作稳定。常见的四支腿有两种布置方案:一种是分别置于车架两端,横向与纵向稳定性较好,支腿受力均匀,但支点间的跨度大,支架大梁受力不好,行驶性能较差,适用于行驶速度低和车架较短的挖掘机;另一种是两个在后端,两个在前后轮中间,横向稳定性好,纵向较差,后支腿受力不均,但大梁受力与使用性能均较好,适用于行驶速度快,车架较长的挖掘机。 When the wheel excavator is working, hydraulic legs need to be installed on both sides in order to reduce the axle load and stabilize the work. There are two common arrangements for the four legs: one is placed at both ends of the frame, the lateral and longitudinal stability is good, the legs are evenly distributed, but the span between the fulcrums is large, and the support frame is not well-stressed. Poor driving performance, suitable for excavators with low travel speed and short frame; the other is two in the rear end, two in the middle of the front and rear wheels, good lateral stability, poor longitudinal direction, and force on the rear leg Uneven, but the beam has better performance and performance, suitable for excavators with fast driving speed and long frame.