Universal wheel

A kind of universal wheel, which consists of big and small drum-shaped rollers, bat-shaped brackets, long and short mandrels, side panels, bearings, a central shaft and a wheel carrier, which is characterized that the outer edge of the wheels is the wheel rim constituted by big and small drum-shaped rollers;

• a long mandrel is disposed at the center of the small drum-shaped roller and which is installed on the bat-shaped brackets, the lower parts of the left and right side of the bat-shaped brackets are each provided with one shaft hole respectively for fitting the short mandrels of the big drum-shaped roller, the big drum-shaped roller is fit over the short mandrel, the two ends of the big drum-shaped roller are provided with the grooves for inserting the left end or the right end of the bat-shaped brackets and the big drum-shaped roller is supported between the two bat-shaped brackets, the big and small drum-shaped rollers are supported by the bat-shaped brackets and constitute the wheel rim;
• the bearings are provided at the center of the side panels and with the center of the bearings as the central shaft installing wheel carrier there on.