Hydraulic under-actuated claw

The utility model discloses a hydraulic under-actuated claw, which comprises a frame, three finger mechanisms connected to the frame and a control mechanism, and is characterized in that the control mechanism comprises a drive branching transmission mechanism and a finger position regulating mechanism; the frame is mechanically connected with the three finger mechanisms, the middle of the frame is provided with a finger position regulating mechanism capable of regulating the positions of the finger mechanisms, and the periphery of the frame is provided with the drive branching transmission mechanism; and the drive branching transmission mechanism can drive the finger mechanisms and make the finger mechanisms have different grabbing states. By improving the mechanical mechanisms, a hydraulic motor is arranged on the claw, a hydraulic motor control valve is arranged on an assembled excavator and is connected with the motor through a pipeline to match a main machine of engineering machinery so as to make the actuated claw do corresponding actions, and the hydraulic under-actuated claw is applied to the engineering machinery industry. Through the stability of hydraulic pressure, the grabbing force and the stability of the claw are improved, the claw can grab heavy objects, and the application space of the actuated claw is expanded.