Connecting device of hydraulic element

The utility model discloses a hydraulic element connecting device which comprises a connecting module and a discharging module. The connecting module comprises a mounting bottom plate, a material containing shell movably mounted at the top of the mounting bottom plate, a hydraulic cylinder shell slidably arranged in the material containing shell, an air cylinder connected with the top of the mounting bottom plate, a transverse plate connected with the movable end of the air cylinder and a motor connected with the top of the transverse plate. The electric clamp is connected with an output shaft of the motor, and the unloading module comprises a spring installed on the top of the installation bottom plate, a chain connected with the front end of the spring and a plate body connected between the movable end of the air cylinder and the chain. According to the utility model, the expansion and contraction of the movable end of the cylinder can drive the chain to move, and then the chain affects the chain wheel, so