Manipulator system of second wheel on YB45 type hard box packaging machine

The utility model discloses a mechanical arm system of a second wheel on a YB45 type hard box packaging machine. The mechanical arm system comprises a mechanical arm structure and a connecting rod tool. The mechanical arm structure comprises a clamping jaw disc, a disc cam and a connecting rod mechanism, the disc cam and the clamping jaw disc correspond to the disc cam and the connecting rod mechanism, the disc cam and the clamping jaw disc are coaxially fixed, the connecting rod mechanism comprises a swing rod and a connecting rod which are connected with each other, and the connecting rod comprises connecting parts with the two ends connected with the disc cam and a length adjusting part arranged between the two connecting parts. The swing rod is connected with the driving mechanism; the connecting rod tool comprises a body, a first pin and a second pin, wherein the first pin and the second pin are fixed to the two ends of the body, and the distance between center shafts of the first pin and the second pin