Angle positioning tool for inner hole of chain wheel shaft

The utility model discloses an angle positioning tool for an inner hole of a chain wheel shaft. The angle positioning tool comprises a base and a fixed shaft tube, positioning holes are formed in the surface of the base; a positioning ring is arranged on the side surface of the sprocket shaft; the fixed shaft tube penetrates through a shaft hole of the sprocket shaft and is arranged in the positioning ring; the positioning ring is arranged in the positioning hole; a first threaded hole and a second threaded hole are respectively formed in the positioning ring and the fixed shaft tube; a supporting bracket is mounted on the base, and the other end of the supporting bracket is arranged in the fixed shaft tube; a lifting mechanism is mounted on the base; a bolt is mounted on the lifting mechanism; the bolt penetrates through the first threaded hole and the second threaded hole and is arranged opposite to the contact in an up-and-down mode. The lifting mechanism is installed on the base, the bolt is installed on