Hollow PU wheel

The utility model discloses a hollow PU wheel, and relates to the technical field of wheels. Comprising a wheel carrier; the wheel frame is fixedly connected to the surface of the wheel carrier; the eight placing grooves are respectively formed in the circumferential surface of the wheel carrier and the circumferential inner wall of the wheel frame; the number of the pressure-resistant mechanisms is four, and each pressure-resistant mechanism comprises a telescopic rod which is fixedly connected to the lower inner wall of one placement groove; the two springs are arranged on the circumferential surface of the telescopic rod in a sleeving manner; the fixed pressing block is arranged on the circumferential surface of the telescopic rod in a sleeving manner; the two limiting pull rods are connected to one side end of the fixed pressing block in a sliding manner; and the two pressing sheets are fixedly connected to one ends of the two limiting pull rods respectively. The hollow PU wheel disclosed by the utility m