Mounting structure of cam flyweight on cam shaft

The utility model discloses a mounting structure of a cam flyweight on a cam shaft, which comprises a flyweight rivet, a cam shaft body, the cam flyweight and a flyweight lining arranged at the bottom of a flyweight notch, the cam shaft body is provided with the flyweight notch for mounting the cam flyweight, the cam flyweight is mounted in the flyweight notch through the flyweight rivet, and the flyweight lining is arranged at the bottom of the flyweight notch. The flyweight rivet is sleeved with the flyweight lining, the flyweight lining is located between the end of the flyweight rivet and the cam shaft body, the flyweight lining comprises a large end and a small end, the upper end face of the small end is in contact with the flyweight rivet, one end of the cam flyweight is arranged outside the small end in a sleeved mode, and the height of the small end is larger than the thickness of the cam flyweight. The gap between the cam flyweight and the flyweight rivet end is controlled through the height of the s