The present application discloses an underactuated finger and an underactuated multi-finger hand grasping
system, belonging to the technical field of underactuated fingers. It comprises a finger base, the finger base is provided with a first driving mechanism, the first driving mechanism drives the
middle finger joint connected thereto, and drives the
middle finger joint to rotate along the width direction of the finger base; a transmission mechanism is provided in the
middle finger joint, the first driving mechanism drives the end finger connected to the transmission mechanism through the transmission mechanism, and drives the end finger to rotate along the width direction of the middle
finger joint. The compact structural design of the underactuated finger in a small space is realized, the accuracy and reliability are improved, and the grasping effect is good; the underactuated fingers are all connected to the upper plate thread through the finger rotating shaft, which reduces the complexity of the structure, and the electrical
signal lines are connected between the modules through the wire holes of the finger base and the finger rotating shaft. The problem existing in the prior art that "the transmission mechanism is difficult to pre-tighten in real time, the rigidity is poor, the actual grasping effect is poor, and it is difficult to complete high-quality grasping" is solved.