Piston cylinder oil cavity damper

The utility model relates to a hollow piston oil cavity damper which comprises a hollow oil cavity, an upper piston head valve, a lower piston head valve, a lower oil cavity and a compensation cavity. An upper oil cavity, a lower oil cavity and a compensation cavity are arranged, each oil cavity carries out oil displacement through a piston valve port, a piston head connected with the lower end of a piston cylinder is used for carrying out oil displacement, a secondary rod (piston cylinder) integrally moves in the lower oil cavity, the lower oil cavity is a hollow cylinder, and a lower end piston valve is arranged below the cylinder in a matched mode. The circular sinking groove 5-1 is formed in the bottom of the compensation cavity. The utility model discloses a piston cylinder oil cavity damper and aims to provide an improved damper which can be matched with an electromagnetic active suspension. The structure of the damper is reasonably utilized to optimize the space of an electromagnetic active suspension