Clamp and star wheel assembly

The utility model provides a clamp and a star wheel assembly, wherein the clamp comprises two clamping arms, one end of each clamping arm is provided with a clamping head, the other end is provided with a clamping tail, shaft holes are arranged between the clamping head and the clamping tail, and are used for accommodating rotating shafts, the clamp also comprises two gear components and a rolling wheel, one gear component at least comprises a tooth, the other gear component at least comprises two teeth, the teeth of the two gear components are respectively arranged on the circumferences which are respectively concentric with the two shaft holes, in addition, when the rotating shafts are accommodated in the shaft holes, the teeth of the two gear components are mutually engaged, and the rolling wheel is arranged in the position of the clamping tail of any one clamping arm in the two clamping arms.