Automatic circle bending machine for parent-child triangular swivel

The utility model discloses an automatic parent-child triangular swivel ring bending machine which comprises a machine frame and a support arranged on the machine frame, a first cam driving shaft and a second cam driving shaft which are in meshing transmission are arranged on the support, and the first cam driving shaft and the second cam driving shaft are vertically arranged. A first connecting rod assembly, a second connecting rod assembly, a third connecting rod assembly and a fourth connecting rod assembly are arranged on the support, a fifth sliding assembly is arranged below the support, and the first connecting rod assembly, the second connecting rod assembly, the third connecting rod assembly, the fourth connecting rod assembly and the fifth sliding assembly are driven by a first cam driving shaft. The second cam driving shaft is connected with a sixth sliding assembly and a seventh connecting rod assembly, a rotating disc is arranged on the rack, a triangular groove is formed in the edge of the rotat