Research on the Self-Adjusting Cushion Device of the Air Cylinder

The existing cylinder's good cushioning is easily destroyed after changes in working conditions, and adjusting the cushioning again is time-consuming and labor-intensive. In response to this issue, this paper studies an automatic adjustment cushion device for pneumatic cylinders. From the perspectives of dynamics and energy, the impact of speed and load changes on the cushioning performance of the cushion cylinder was analyzed. It was found that good cushioning effect can only be achieved when the impact kinetic energy of the cylinder matches the energy absorbed by the cushion chamber. Therefore, when the external impact energy (speed and load) increases, it is necessary to reduce the opening of the cushion valve. Based on this principle, a cushion device composed of a speed adaptive valve and a load adaptive valve in parallel was designed. Process the prototype and conduct experiments under different working conditions. The experimental results show that within the speed range of 0.4~0.6 mls and the load mass range of 11.5~21.5 kg, good cushioning effect can be achieved without manually adjusting the cushioning valve.