液压挖掘机以反铲挖掘作业为主,更换其工作装置也可以进行停机面以上的正铲挖掘作业和停机面上的正铲装载作业。随着机械化施工程度的不断提高,对液压挖掘机的反铲自动水平挖掘作业和正铲自动水平铲装作业的要求越来越迫切。目前,国内液压挖掘机上没有自动水平控制机构,在国外液压挖掘机上采用的也不多,只靠操纵人员的经验和熟练程度,协调控制斗杆油缸和动臂油缸,用斗杆和动臂的合成运动来实现铲斗的 The hydraulic excavator is mainly based on backhoe excavation work, and the replacement of its working device can also perform the front shovel excavation work above the stop surface and the front shovel load operation on the stop surface. With the continuous improvement of the mechanized construction level, the requirements for the automatic backhoe excavation of the hydraulic excavator and the automatic horizontal shoveling work of the shovel are becoming more and more urgent. At present, there are no automatic level control mechanisms on hydraulic excavators in the country, and not many hydraulic excavators are used on foreign countries. Only relying on the experience and proficiency of operating personnel, coordinated control of the stick cylinders and boom cylinders, and the use of sticks and booms. Synthetic movement to achieve bucket