Double air bag type stiffness infinite adjustable hydro-pneumatic spring

The utility model relates to a double air bag type stiffness infinite adjustable hydro-pneumatic spring which comprises a main working cylinder, an oil pipe and a subsidiary oil cylinder, wherein the oil pipe is connected at the upper end of the main working cylinder. The subsidiary oil cylinder is connected with the other end of the oil pipe and comprises a subsidiary cylinder, a damper valve assembly, two air bags, two air bag seats, a separating plate, a connecting pipeline, a solenoid valve, a pump oil pipe line, an oil returning pipeline, an oil pump, an oil tank and a ventilation hole, wherein the subsidiary cylinder is connected with the oil pipe, the damper valve assembly is arranged in the subsidiary cylinder, the two air bags and the two air bag seats are symmetrically arranged at one side of the damper valve assembly, the separating plate is arranged between the two air bags, the connecting pipeline is arranged at the other end of the subsidiary cylinder, the solenoid valve is arranged on the conne