Piston type oil cylinder structure

The utility model discloses a piston type oil cylinder structure and belongs to the field of transmission. The oil cylinder comprises a cylinder body, a piston and a piston rod connected with the piston. The piston type oil cylinder structure is characterized in that an end cover board is arranged at one end of the cylinder body, and a pressing cover is arranged at the other end of the cylinder body. A guiding sleeve is arranged in the pressing cover, and the piston is arranged in the cylinder body. The piston rod penetrates through the guiding sleeve in the pressing cover. A sealing ring a is arranged at the joint between the end cover board and the cylinder body, and a sealing ring b is arranged at the joint between the pressing cover and the cylinder body. Double sealing rings c are arranged at the joint between the piston and the cylinder body, and a wear-resistance sealing ring is arranged at the joint between the interior of the guiding sleeve and the piston rod. The oil cylinder is easy to install, the piston and the cylinder body utilize the double sealing rings, and therefore the service life of the oil cylinder is ensured.