液壓油缸中常用的緩沖裝置有節(jié)流口可調式和節(jié)流口變化式兩種，節(jié)流口變化式被封在活塞和缸蓋間的油液經針形節(jié)流閥流出，節(jié)流閥開口可根據負載情況進行調節(jié)，起始緩沖效果大，隨著活塞的行進，緩沖效果逐漸減弱，故制動行程長，緩沖腔中的沖擊壓力大，緩沖性能受油溫影響 ，適用范圍廣。
液壓油缸一般由缸體，缸桿及密封件組成，缸體內部由活塞分成兩個部分，分別通一個油孔。由于液體的壓縮比很小，所以當其中一個油孔進油時，活塞將被推動使另一個油孔出油，活塞帶動活塞桿做伸出（縮回）運動，反之依然。
中譯英：
Hydraulic cylinder used in the cushioning device having tunable throttle orifice changes and type two kinds, throttle change type sealed in between the piston and the cylinder head of the oil liquid with a needle-shaped throttle outflow, throttle valve opening can be adjusted according to the load, initial buffering effect, along with the piston travel, buffering effect gradually weakened, so the braking distance is long, the buffer cavity in the shock pressure, cushioning effect of the oil temperature, wide scope of application.

Hydraulic cylinder by cylinder, cylinder rod and a sealing piece, by the piston inside the cylinder body is divided into two parts, respectively, through an oil hole. Because the liquid compression ratio is very small, so when one of the oil hole oil inlet, the piston