Hydro-pneumatic spring device capable of regulating damping force

A hydro-pneumatic spring device, capable of regulating a damping force, comprising a liquid reservoir, a hydraulic cylinder, and a damper,

• wherein the hydraulic cylinder comprises a cylinder barrel component and a connecting rod and piston component, the connecting rod and piston component is slidably mounted in the cylinder barrel component, and the cylinder barrel component is divided into a rod cavity and a rodless cavity via the connecting rod and piston component;
• and
• the damper comprises a first damping valve, a second damping valve, and a valve body, both the first damping valve and the second damping valve are mounted on the valve body, and the rodless cavity is capable of being in communication with the reservoir and the rod cavity via the first damping valve and the second damping valve, respectively, or, the rodless cavity is capable of being in communication with the rod cavity and the reservoir via the first damping valve and the second damping valve, respectively.