Guide wheel spindle structure of centerless grinding machine

The utility model relates to a guide wheel spindle structure of a centerless grinding machine, in particular to an improved structure of a guide wheel spindle of a tapered roller centerless grinding machine, which comprises a spindle and a guide wheel arranged on the spindle. The first rotary supporting structure and the second rotary supporting structure are axially positioned through a shaft shoulder of the main shaft, the first rotary supporting structure and the second rotary supporting structure are matched with the guide wheel through conical surfaces, and the first rotary supporting structure is provided with an adjusting assembly for adjusting the position of the guide wheel. The two ends of the guide wheel are supported in a conical surface contact mode, automatic centering is achieved, the coaxiality is automatically guaranteed, and manual adjustment of the coaxiality is not needed any more. In the using process, even if the guide wheel is subjected to impact vibration or other external force, the c