Self-propelled gripper

A self-propelled gripper, being installed on a robotic arm, the robotic arm comprising a body and a tip axis, the tip axis including a flange face and at least one locking hole, the at least one locking hole being formed on the flange face, and a rotation central line being defined by the flange face, the self-propelled gripper comprising:

• a housing, being fixed to the body and including a guiding rod extending along and coinciding with the rotation central line;
• a rotation element, being disposed in the housing, including a connecting surface being fixed to the flange face;
• a moving element, being movably disposed in the housing and connected to the rotation element, the moving element including at least one slot and a guiding hole extending along and coinciding with the rotation central line, the guiding rod and the guiding hole respectively having a non-circular cross-section corresponding to each other so that the guiding rod and the guiding hole are assembled with each other and the moving element is constrained to move along the rotation central line;
• and
• at least one claw body, being pivoted on the housing and partially extending into the at least one slot correspondingly;
• wherein when the rotation element rotates along with the tip axis, the rotation element drives the moving element to process a linear motion along the rotation central line so that the at least one claw body pivotally rotates on the housing, and wherein when the rotation element rotates along with the flange face, the guiding rod guides the moving element only process the linear motion along the rotation central line relative to the housing.