Piston type inner pull rod inner air supply executing mechanism

The utility model discloses a piston type inner pull rod internal air supply actuating mechanism, which is characterized in that a piston is in contact with the inner wall of an air cylinder body and divides the air cylinder body into a first cavity and a second cavity; the other end of the first inner pull rod penetrates through the piston and is connected with the bottom of the cylinder body; a first through hole is formed in the bottom of the air cylinder body and connects the second through hole with an air conveying opening of the air inlet assembly. The first inner pull rod is further provided with an air outlet, and the air outlet is used for conveying air to the first cavity or the second cavity and driving the piston to move back and forth under the action of air pressure; the piston type air actuating mechanism has the advantages that in the piston type air actuating mechanism, the hollow structure is arranged in the first inner pull rod, the air outlet is formed in the position corresponding to the