Patent ID: 8707871

Claim:
A self-steering device for a railway vehicle, including: axles installed on a truck supporting a vehicle body of the railway vehicle; wheels connected to the axles, each wheel having a wheel tread moving on a top surface of a rail and supporting a vertical load of the railway vehicle, and a wheel flange protruding from the wheel tread to prevent the railway vehicle from derailing and being in contact with a lateral surface of the rail during straight movement of the railway vehicle to form an interference section; and guide rollers, each of which is in rolling contact with a top surface edge or a lateral surface of the rail in front or to the rear of the wheel when the railway vehicle enters curved rails and supports a greater transverse load than the interference section; wherein a guide roller gauge that is an axle-direction spaced distance between the guide rollers, is shorter than a wheel flange gauge that is an axle-direction spaced distance between the wheel flanges, and during the straight movement of the railway vehicle, according to a difference between the guide roller gauge and the wheel flange gauge, the guide roller is separated from the lateral surface of the rail and the wheel flange is in contact with the lateral surface of the rail, whereas during the curved movement of the railway vehicle, according to the difference between the guide roller gauge and the wheel flange gauge, the wheel flange is separated from the lateral surface of the rail and the guide roller is in contact with the lateral surface of the rail.