Gear hub structure of automobile engine

The utility model provides a gear hub structure of an automobile engine. The gear hub structure comprises a hub body and a hub body inner circle, wherein the hub inner circle forms a small taper angle with an half angle of 2-6 degrees; an inward limit lug boss is arranged at a small tapered port of the hub inner circle; and the thickness of the limit lug boss is smaller than or equal to that of a bushing. According to the gear hub structure of the automobile engine, the hub inner circle is designed into the small taper angle with the half angle of 2-6 degrees, so that the bushing is self-locked after pressed and mounted on the hub inner circle; at the same time, the tail end adopts a limit lug boss structure, so that the torque resistance between the bushing and a hub is increased by 50% by virtue of a tapered structure, the bushing rotation problem during operation of the engine is solved; and the limit lug boss is mounted, so that the outward moving problem of the bushing is solved. The gear hub structure o