Coaxial contra-rotating connecting mechanism

A coaxial contra-rotating connecting mechanism, comprising a synchronous contra-rotating connecting mechanism and a fixing plate, wherein the synchronous contra-rotating connecting mechanism comprises a left rotating connecting arm, a right rotating connecting arm, and a connecting shaft, the connecting shaft is fixedly connected to the fixing plate, and the left rotating connecting arm and the right rotating connecting arm are respectively provided with a first connecting part and a second connecting part which are sleeved on the connecting shaft and are rotatably connected to the connecting shaft;

• a cam assembly which can slide rather than rotating relative to the connecting shaft is provided on the connecting shaft, the cam assembly is located between the first connecting part and the second connecting part, and the first connecting part and the second connecting part are respectively provided with structures matching the cam assembly, so that the left rotating connecting arm and the right rotating connecting arm synchronously rotate in opposite directions;
• the coaxial contra-rotating connecting mechanism is further provided with an elastic component and/or a threaded locking structure to compress the first connecting part, the cam assembly and the second connecting part, and the first connecting part and the second connecting part match the cam assembly at two ends of the am assembly so that the first connecting part and the second connecting part are positioned in the axial direction.