Clamps

A clamp, comprising:

• a housing includes only one housing positioning hole;
• a driving mechanism disposed in the housing;
• a clamping jaw assembly partially disposed outside the housing, the clamping jaw assembly including at least two clamping jaws;
• wherein
• the driving mechanism is configured to drive the clamping jaw assembly to move, such that the clamping jaw assembly switches between a first deformation state and a second deformation state;
• the at least two clamping jaws are gathered with each other in the first deformation state, and the at least two clamping jaws are separated from each other in the second deformation state;
• and
• only one positioning shaft configured to rotatably fix the at least two clamping jaws to the housing, wherein
• the positioning shaft is matched with the housing positioning hole, and while the clamping jaw assembly switches from the first deformation state to the second deformation state, the at least two clamping jaws rotate around the positioning shaft.