Automobile rod brake device

The utility model relates to a rod type brake device of automobile, which comprises an automotive bottom beam, a support guide frame is respectively arranged fixedly at left and right sides of the bottom beam, a cylinder is arranged at the middle of the support guide frame, the cylinder is connected with a gas pipe, upper and lower rolling wheels are arranged outside the cylinder and contact with the upper and lower surfaces of the support guide frame, a piston rod is arranged in the cylinder, a reset spring is arranged between the cylinder and the piston rod, a brake steel plate is connected at the outside of the piston rod; the front and rear sides of the cylinder are respectively connected with one end of a suction buffer spring, the other end of suction buffer spring is connected with a pressurized steel plate, the pressurized steel plate is connected fixedly below the bottom beam. In the rod type brake device of automobile, the friction between the brake steel plate and the ground is assistant to perform