Main shaft for transmission

The utility model relates to the technical field of agricultural machinery, and particularly discloses a main shaft for a speed changer, which comprises a shaft body, a plurality of chutes are arranged on the shaft body, the length direction of each chute is the axial direction of the shaft body, the chutes are distributed along the circumferential direction of the shaft body, a gear can be mounted on the shaft body, and a plurality of bulges are arranged on the circumferential direction of a shaft hole of the gear and are slidingly connected to the chutes. The scheme is used for solving the problems that in the prior art, the connection relation between the rotating shaft and the gear is a flat key, a wedge key, a spline and the like, more rotating shafts and gears need to be used for achieving multi-gear speed change of the speed changer, and therefore the speed changer is higher in cost, larger in overall size and heavier in weight. 本实用新型涉及农业机械技术领域，具体公开了变速器用主轴，包括轴体，轴体上设有若干个滑槽，滑槽的长度方向为轴体的轴向，若干个滑槽沿轴体周向分布，轴体能