Conical disc output type rotary joint driven by steel wire

The invention provides a conical disc output type rotary joint driven by a steel wire, and relates to a robot drive joint. The lower end of an upper arm shaft is fixed on an upper arm, a hinge hole is formed in the upper end of the upper arm shaft, a bearing block is fixed on the upper arm, two ends of a conical shaft are respectively hinged to the bearing block and the hinge hole, an inputting shaft of the conical shaft is connected with an outputting shaft of a motor, the motor is fixed on a motor seat, the motor seat is fixedly connected with the upper arm, a conical disc is arranged at one end of a forearm, a mounting hole is formed in the axis of the conical disc and is rotatably connected with the upper arm shaft, a conical surface of the conical disc is attached to a conical surface of the conical shaft, a spiral groove is formed in the conical surface of the conical shaft, a steel wire rope groove which corresponds to the spiral groove is formed in the conical surface of the conical disc, a plurality