Rotating arm structure of automobile part machining automatic line mechanical hand

The invention belongs to the field of automatic equipment for automobile parts and particularly relates to a rotating arm structure of an automobile part machining automatic line mechanical hand. The rotating arm structure comprises an arm wrist structure and a clamping and grabbing structure arranged at the end portion of the arm wrist structure. The arm wrist structure comprises a shaft sleeve and an arm part. The arm part is provided with a control element integrated box. The end portion of the arm part is movably provided with a third pin shaft sealed through an upper shaft end cover and a lower shaft end cover. A rotating device is arranged on the third pin shaft. The rotating device comprises a movable piece fixed to the third pin shaft through screws, and a fixed piece is further connected to the outer circumferential face of the third pin shaft in a sliding manner. The fixed piece is fixedly connected with the shaft sleeve of the third pin shaft through screws, and the inner circumferential face of the shaft sleeve is connected with the movable piece in a sliding manner. According to the rotating arm structure, the product productivity is improved, the production cycle is shortened, the product quality is improved, and economic benefits of enterprises are improved more directly.