| 摘要 |
The invention relates to the structure and the shape of a kind of new universal wheel, which comprises of drum-shaped rollers, bat-shaped brackets, mandrels, side panels, bearings, a central shaft and a wheel carrier. It characterizes in that the drum-shaped rollers and the mandrels from a rim by fixed in the bat-shaped brackets, and the bat-shaped brackets are connected to the side panels, the bearings, the central shaft and the wheel carrier are fixed on the center of the side panel. Since the big and small drum-shaped rollers form a double freedom structure, the wheel can move in any direction without turning so that it can save the turning space. Moreover this kind of universal wheel has good sealing performance, the sand will not enter the inner chamber.
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