摇臂通过转轴、凸轮、滑轮、钢丝绳、提升杆与配重块相连，初始位置可由挡轴选定；
The rocker arm is connected with the balance weight block through a rotary shaft, a cam, a pulley, a steel cable and a lifting rod, and an initial position can be selected through a barrier shaft.
本发明对转轴施加扭矩加载，重力弯矩由小滑轮轴负担。
The loading device applies torque loading to the rotating shaft, and a gravity bending moment is loaded by the small pulleys.
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