▎ 摘　　要

NOVELTY - The utility model claims a new stepped gear shaft with high toughness, belonging to the technical field of stepped gear shaft, comprising a main shaft and a gear; the gear is fixedly sleeved on the outer wall of the main shaft; the left and right sides of the main shaft are fixedly provided with a connecting shaft; the outer wall of the left and right sides of the main shaft are fixedly provided with multiple groups of reinforcing brackets; The utility model is provided with a reinforcing bracket; the reinforcing bracket makes the main shaft and the connecting shaft form a triangular structure support; the strength and toughness of the stepped gear shaft are improved; the outer wall of the main shaft and the connecting shaft are provided with a graphene layer; the wear-resistant performance and toughness of the stepped gear shaft are improved; at the same time, the shaft body is made of metal material; the manufacturing material is mixed with fine granular metal carbide, backfire sorbite and martensite; the whole strength of the lifting shaft body, hardness and tensile strength, so that the strength of the stepped gear shaft is higher, the toughness is higher.