Novel drum type coupler

The utility model relates to a novel reel type coupler which comprises a main body and an inner ball, the inner ball is sleeved with the middle of the interior of one side of the main body through a steel ball, a driving shaft is installed in the middle of one side of the inner ball, an outer groove is formed in the position, located at the steel ball, of the outer surface of the inner ball, and an inner groove is formed in the position, located at the steel ball, of the inner surface of the main body. The side, close to the driving shaft, of the body is provided with a pressing plate through positioning screws. By arranging the steel balls, the inner balls, the inner grooves and the outer grooves, the bearing driving force borne by the coupling is dispersed, so that the service life of the drum-type coupling is prolonged, and the problems that an existing drum-type coupling adopts protrusions and arc-shaped grooves for power transmission, in the high-load bearing force operation process, abrasion is prone to