Bumper shock absorber for multi -purpose vehicle(MPV)

The utility model discloses a bumper shock absorber for multi -purpose vehicle(MPV), including a cylinder body, slidable mounting has middle piston in the middle of in the cylinder body, there is the lower piston in the cylinder body of middle piston below, there is the upper piston in the cylinder body of middle piston top, it goes up the hydraulic pressure chamber to form between middle piston and the upper piston, form hydraulic pressure chamber down between middle piston and the lower piston, on, the oil pipe intercommunication is passed through in the hydraulic pressure chamber down, form between upper piston and the cylinder body top and go up the atmospheric pressure chamber, form atmospheric pressure chamber down between lower piston and the cylinder body bottom, on, the trachea intercommunication is passed through in the atmospheric pressure chamber down, middle piston bottom surface is through central connecting rod and lower hinge joint, middle piston -top surface is connected with the connecting rod, the connecting rod passes the upper piston and follows the cylinder body top and stretch out. The utility model discloses except relying on the oily absorption spring shock of pressure, still rely on high -pressure nitrogen gas to assist and absorb the shock, have better shock attenuation effect.