Pneumatic cylinder of high -speed action

The utility model discloses a pneumatic cylinder of high -speed action, including that the front end is equipped with the cylinder liner of oil -out, being equipped with the piston that slides the ability front and back in the cylinder liner, the piston divides separate ante -chamber room and back cavity with the cylinder liner, the second oil duct that is equipped with the first oil duct that feeds through preceding cavity on the cylinder liner and feeds through the back cavity, the middle part of piston outer peripheral face is equipped with the ring channel, is equipped with the buffering circle in the ring channel, and the buffering is enclosed to form with pore wall in the cylinder liner and is sealed up, buffering circle slides around can relative ring channel, and oil transportation passageway after forming between the oil transportation passageway in the middle of forming between the interior anchor ring of buffering circle and the bottom surface of ring channel, the piston outer peripheral face that lies in the ring channel rear and cylinder liner pore wall lies in the preceding oil transportation passageway of formation between piston outer peripheral face and the cylinder liner pore wall in ring channel the place ahead. The utility model provides a pneumatic cylinder of high -speed action can carry out buffer adjustment to the backward stroke of the piston for buffering effect better when hydro -cylinder speed is faster.