Detachable eccentric door wheel for numerical control machine tool

The utility model relates to the technical field of numerical control machine tools, in particular to a detachable eccentric door wheel for a numerical control machine tool, which comprises an eccentric shaft and a door wheel, a stepped shaft is arranged at the front end of the eccentric shaft, a threaded shaft is arranged at the front end of the stepped shaft, the door wheel is sleeved on the eccentric shaft, one end of the door wheel is abutted against the end face of the stepped shaft far away from the threaded shaft, and the other end of the door wheel is abutted against the threaded shaft. A bearing is inserted into the door wheel and matched with the eccentric shaft, the door wheel is fixed through a fixing circular ring, and a steel ball is arranged on the side, attached to the door wheel, of the fixing circular ring and makes contact with a conical circular ring hole in the door wheel. The contact area is reduced, rotation of the door wheel is facilitated, the phenomenon that the end face of the door