将抽油机简化为4连杆机构，仿真出悬点的位移、速度、加速度、扭矩因数、游梁转角等参数，并绘出图形-The pumping unit is simplified to 4 link mechanism, and the simulation of the displacement, speed, acceleration, torque factor, You Liang angle and other parameters of the suspension point, and draw gra