How to solve the buffering problem of cylinder?

At present, there are three common types. The first is that the cylinder diameter is relatively small, that is, an anti-collision pad is added to the cylinder head, and iron and plastic can be selected; The second type is air cushion, that is, a threaded hole is drilled near the air inlet to introduce the cylinder, which can be adjusted, and the buffer size of the cylinder can be adjusted by the flow rate during exhaust. At present, this method is mostly used in cylinders; The third is to use an oil pressure buffer, which is a shock absorber. When the cylinder is about to reach the end point, the oil pressure buffer is used for buffering. This buffering form is more accurate and effective, and the cost is higher.