Buffer device for opening and closing bottom door of bottom-opening-door open wagon

The utility model discloses a buffer device for opening and closing a bottom door of a bottom-opening-door open wagon, which comprises a torsion rod spring mechanism, the torsion rod spring mechanism comprises a torsion rod spring and a connecting rod, the torsion rod spring is U-shaped, one end of the torsion rod spring is connected with the bottom door of the railway open wagon, and the other end of the torsion rod spring is rotatably connected with one end of the connecting rod; the other end of the connecting rod is rotationally connected with a bottom frame of the railway open wagon, the spring buffering structure is arranged on a bottom door stop of the bottom door of the railway open wagon, and when the bottom door of the railway open wagon is opened, the spring buffering structure and the bottom door of the railway open wagon are in elastic fit. According to the buffering device, the opening and closing impact force of the bottom door is relieved through the torsion rod spring mechanism and the spring