Drum-gear angular flexible coupling

The invention belongs to the field of a transmission device and particularly relates to a drum-gear angular flexible coupling. The coupling provided by the invention comprises driving and driven terminal half-couplings, the half-coupling of the drum-gear coupling, an angular sensor, a diaphragm group and two butt disks, wherein the half-coupling of the drum-gear coupling is sheathed on the driven terminal half-coupling; the half-coupling of the drum-gear coupling and the driven terminal half-coupling are mutually meshed through internal and external gears; and one side of the angular sensor is sequentially connected with the diaphragm group, the butt disk I and the driving terminal half-coupling from interior to exterior, and the other side of the angular sensor is sequentially connected with the butt disk II, the half-coupling of the drum-gear coupling and the driven terminal half-coupling from interior to exterior. The coupling provided by the invention can automatically adjust, control and compensate the axial movement and angular offset of a driving machine and a driven machine, thereby enabling the wear degree of the gear surface to be reduced to the minimum; and the vibration caused by the transmission of the driving machine and the driven machine can be reduced, the noise can be lowered, and the service life of a drum gear can be prolonged, thereby achieving the functions of saving the energy and protecting the environment.