Novel heavy-load clamping device achieving single-drive four-finger synchronous clamping

The invention discloses a novel heavy-load clamping device achieving single-drive four-finger synchronous clamping. The device comprises a power hydraulic cylinder body, a clamp shell body and outer connection rod mechanisms. The power hydraulic cylinder body is installed on the clamp shell body, a push rod of the power hydraulic cylinder body is of a structure composed of inner side arms and outer side arms, the upper side face and the lower side face of the exterior of the push rod are both fixedly connected with one outer side arm, and the upper side face and the lower side face of the interior of the push rod are both fixedly connected with one inner side arm; the two outer side walls of the push rod are symmetrically connected with the outer connection rod mechanisms respectively, the two inner side arms of the push rods are symmetrically connected with inner connection rod mechanisms respectively, and the outer connection rod mechanisms and the inner connection rod mechanisms are identical in structure. The clamping device is a key part in heavy-load operation equipment, enables a single hydraulic cylinder to drive four fingers to synchronously clamp a workpiece, the clamping stability coefficient of the heavy-load clamping device is increased, the critical load of a jaw is increased, clamping performance is improved, and the clamping device can be used for clamping the workpiece and matched with a forging machine to finish various forging technologies such as cogging, heading, drawing and finishing.