Diameter-variable rotating shaft and paper tube recovery device comprising same

The invention discloses a diameter-variable rotating shaft and a paper tube recovery device comprising the same. The rotating shaft comprises a rotating shaft body and a plurality of arc-shaped supporting plates, and the arc-shaped supporting plates are located on the outer side of the rotating shaft body; the two ends of the rotating shaft body are sleeved with shrinkage sleeves, a plurality of guide rods are rotationally installed on the outer sides of the shrinkage sleeves, the other ends of the guide rods are rotationally connected with the inner sides of the arc-shaped supporting plates, and the shrinkage sleeves can move relative to the rotating shaft body to adjust the inclination angles of the guide rods. Adjusting sleeves are installed at the two ends of the rotating shaft body, are in threaded fit with the rotating shaft body and abut against the shrinkage sleeves. The rotating shaft with the variable diameter is arranged, the multiple arc-shaped supporting plates capable of being folded or unfolded