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1.载荷分类挖掘机作业时,铲斗、斗杆、动臂及机架承受挖掘载荷、制动载荷、附加载荷(操作不当和违章操作载荷)。(1)挖掘载荷斗齿尖沿着弧线运动,对土壤进行剥离、剪切、挤压,其切线方向力为挖掘力F,其承受的阻力F_Z与挖掘力F方向相反,挖掘力F与切削角和切削速度成正比,如图1所示。这种挖掘载荷通过铲斗、斗杆、动臂传递至回转平台、回转支承至机架,只要进行挖掘作业就必然产生挖掘载荷,传递路线如图2所示。挖掘载荷会
1. Load classification Excavator operation, bucket, arm, boom and rack to withstand excavation load, braking load, additional load (improper operation and illegal operating load). (1) Excavation load tooth tip along the arc movement, soil stripping, shearing, extrusion, the tangential force of the digging force F, the resistance F_Z and digging force F opposite direction, the digging force F and Cutting angle and cutting speed is proportional to, as shown in Figure 1. The digging load is transmitted to the rotary platform through the bucket, the arm and the boom, and the rotary support is rotated to the rack. As long as the digging operation is performed, an excavation load is inevitably generated, and the transmission route is as shown in FIG. 2. Mining load will be