Feeding device for train wheel pair automatic detecting system

The utility model relates to a feed-in device of train wheel automatic detecting system, which includes a left guide rail (1), a left guide rail slider (2), a motor and a reducing device of the motor (4), a beam (6), a right guide rail slider (7), a right guide rail (8), a frame (9) and a conversion mechanism of rotation motion and linear motion, wherein, the left guide rail (1) and the right guide rail (8) are respectively fixed on both sides of the frame (9); one side of the left guide rail slider (2) and one end of the right guide rail slider (7) are respectively fixed on both ends of the beam (6); the other end of the left guide rail slider (2) and the other end of the right guide rail slider (7) are respectively arranged on the left guide rail (1) and the right guide rail (8); and the beam (6) is connected with the output of the motor and the reducing device of the motor (4) by the conversion mechanism of rotation motion and linear motion. With the structure that the motor and the reducing device of the motor drives the beam to move along the guide rail by the motion conversion mechanism, the utility model not only has quite high positioning precision, but also has the advantages of simple structure, easiness in assembly, smoothness in running, small spacing, convenience in maintenance and quite low cost. Applied in the train wheel automatic detecting system, the utility model can detect all dimension parameters of the train wheel at one time, so as to greatly reduce the labor intensity of the workers, reduce the error produced by manual measurement and improve the measuring precision.