Connecting sleeve

The utility model discloses a connecting sleeve, belongs to the technical field of mechanical equipment, and aims to solve the technical problem that the connecting sleeve is abraded after being used for a long time due to the fact that the connecting sleeve is not tightly matched with a valve plate shaft head to a certain extent. The air reversing valve shaft sleeve comprises a first connecting shaft sleeve and a second connecting shaft sleeve, the first connecting shaft sleeve and the second connecting shaft sleeve are coaxially connected, the first connecting shaft sleeve is provided with a first connecting hole penetrating through the two ends, and the length of the first connecting hole is not smaller than that of a shaft head; in this way, the shaft head can be completely inserted into the first connecting hole, the matching length of the shaft head and the first connecting hole is large, the first connecting shaft sleeve and the shaft head are tightly matched, meanwhile, the aperture size of the first