Cylinder body piston sealing structure adopting sealing ring

The utility model provides a cylinder body piston sealing structure adopting a sealing ring. The hydraulic cylinder comprises a cylinder body and a piston arranged on the cylinder body, a groove is formed in the piston; a sealing ring is arranged in the groove; the cross section of the sealing ring comprises a circular elastic bottom and a square part fixed on the elastic bottom; the top end of the side wall of the groove is provided with an extending part extending to the position above the groove, the top face, away from the elastic bottom, of the square part is provided with a protruding part protruding out of the extending part, and the portions, on the two sides of the protruding part, of the top face of the square part and the bottom face of the extending part are inclined faces. Theutility model provides a cylinder body piston sealing structure adopting a sealing ring, and aims to solve the problem that when a cylinder body piston moves to pass through an air hole, the sealingring is extruded out of th