Tendon rope parallel skillful under-driven bionic robot finger device

The invention discloses a tendon rope parallel skillful under-driven bionic robot finger device, which belongs to the technical field of anthropomorphic robots. The device is provided with 5 independently-controlled fingers and 14 joint freedom degrees and driven by 10 motors, wherein the middle finger, the ring finger, the little finger and the index finger have the same structures and are in double-motor driven three-joint rotations; and the thumb is fixedly connected in a palm and is in double-motor driven two-joint rotation. The fingers have similar structures, and comprehensively achieve the special effect of combining variable primary configuration and adaptive grab of the fingers by using motors, tendon ropes and reset spring pieces. The device can flexibly bend the middle joint of the finger before grabbing to reach a stable anthropomorphic pre-bending posture and grab an object in an adaptive under-driven mode during grabbing. The device has the advantages of compact structure, high integration degree and appearance, size, form and action close to human hands, can stably grab and automatically adapt to the objects with different shapes and sizes, also can perform simple operation, and is suitable to be used as an output terminal of the anthropomorphic robot.