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液压单斗挖掘机动臂提升机构一般采用油缸四连杆机构。作用于动臂支点的静力矩有重力矩M、及提升力矩M_(?)。本文所用的参数符号是(见图1):
The hydraulic single bucket excavator boom raising mechanism generally uses a cylinder four-bar linkage mechanism. The static moment acting on the fulcrum of the boom has a heavy moment M and a lifting moment M_(?). The parameter symbol used in this article is (see Figure 1):