Input and output type wheel device

The utility model discloses an input and output type wheel device, which comprises a wheel axle, a gear supported on the wheel axle, a bearing axially positioned on the wheel axle, a wheel supported on the wheel axle through the bearing and a spline plate with an internal spline, and the gear and the spline plate are split and are respectively and detachably fixed at two ends of the wheel; the outer diameter of the gear is smaller than that of the wheel; when the gear is an input type gear, the spline plate is used as an output type spline plate, or when the spline plate is an input type spline plate, the gear is used as the output type gear. The gear and the spline plate of the device are both wear-resistant and quick to replace, and the defect that an existing gear part and a wheel are integrated and cannot be detached is overcome; when the wheels of the device run on the track beam, friction is not generated between the gears and the lower flange of the track beam all the time; the driving transmission dev