Spring buffering formula pneumatic actuator

The utility model relates to a spring buffering formula pneumatic actuator, including current conventional piston pneumatic actuator, piston pneumatic actuator includes cylinder body, last cylinder cap, lower cylinder cap and piston, its characterized in that: be equipped with the last spring buffer unit of a plurality of circumference equipartition on the interior plane of last cylinder cap, upward surfaces to mate on spring buffer unit and the piston provides the cushioning effect for pneumatic actuator's upwards action, be equipped with the lower spring buffer unit of a plurality of circumference equipartition on the interior plane of lower cylinder cap, surfaces to mate under spring buffer unit and the piston provides the cushioning effect for pneumatic actuator's downward action down. The utility model discloses the structure is ingenious, and reasonable in design makes pneumatic actuator all have spring buffer function in start of a run, final position, can be used to fast, frequently move the occasion to the cushion stroke accuracy is controllable, and cushion stroke is little, does not influence pneumatic actuator response speed.