1results about How to "No twisting" patented technology

The utility model relates to a plunger cylinder technical field, especially a compact plunger cylinder of back and forth action, including cylinder body, plunger rod and guide sleeve, the head end of cylinder body is covered in guide sleeve, plunger rod is located in the cylinder body, and plunger rod stretches out from the guide hole of guide sleeve, its characterized by: still including piston rod, the tail end of plunger rod in cylinder body has piston hole, and the piston end of piston rod inserts piston hole, and the inner chamber of piston hole is divided into rod cavity and rodless cavity by the piston of piston end, and the opening of piston hole is covered with cylinder cover, and one piston oil cylinder is formed on plunger rod, and the rod end of piston rod is connected with the bottom end of cylinder body. The utility model has the beneficial effects that: through inlaying piston oil cylinder in plunger cylinder, the self-limiting and back and forth action of plunger cylinder are realized while not increasing the volume of plunger rod, and moreover, plunger cylinder and piston oil cylinder can work simultaneously, and plunger cylinder will not cause the decrease of thrust because of inner chamber piston oil cylinder.