Combined split-type spindle of miniature corn thresher

The utility model discloses a combined split-type spindle of a miniature corn thresher. The spindle comprises bearings (1), a cutter shaft sleeve (2), spike teeth (3), an inner solid shaft (4), keys (5) and key slots (6), wherein the key slots are formed in the outer surface of the inner solid shaft (4) and the inner surface of the cutter shaft sleeve (2); the inner solid shaft (4) and the cutter shaft sleeve (2) are connected with each other through the keys (5); the cutter shaft sleeve is divided into three segments; the spike teeth (3) which are arrayed spirally in a rectangular manner are welded on the outer surface of the cutter shaft sleeve; a bearing (1) is installed at each end of the inner solid shaft (4); and the bearings are installed on a rack through bearing supports. The combined split-type spindle of the miniature corn thresher is easy to assemble and disassemble and simple in manufacturing process, and is economical and practical. When the spike teeth wear or are broken, only the segment of which the spike teeth are damaged instead of the whole cutter shaft sleeve is required to be replaced, so the maintenance cost is reduced, the service life of the miniature corn thresher is prolonged, the manufacturing cost is decreased, and economic benefits of farmers are increased.