Air wheel of grinder

The utility model relates to the air wheel of a grinder, comprising a rubber barrel, a pipe body, a shaft sleeve device, an end platen and an end cover; the end platen and the end cover are formed by punch forming. Both ends of the hollow pipe body can be sheathed with the shaft sleeve device, and the shaft sleeve device is composed of a sleeve barrel and an O-shaped ring seal arranged on the sleeve barrel. A projection formed on a circular hole which is arranged in the end platen is sheathed at the other end of the shaft sleeve device, and the projection is arranged in the rubber barrel. The end cover is tightly fixed on the end platen, and the flanges formed at both ends of the rubber barrel can be clamped by the end platen and the end cover. The integral structure is the modularization design, and the purposes of quick assembly and good air-tightness can be obtained.