Maize secondary thresher

The utility model discloses a maize secondary thresher, including dwang, threshing roller, corncob fixed gear, its characterized in that: threshing roller passes through the nut to be fixed on the dwang that a plurality of group symmetries set up, is equipped with corncob fixed gear in the middle of the threshing roller, and the threshing roller top is equipped with the visor, and the threshing roller below is equipped with the collecting box, and one side of collecting box is equipped with corn cob discharging opening, the last radial evenly distributed of threshing roller has the profile of tooth boss, threshing roller is plastics one shot forming spare, threshing roller's direction of rotation is opposite, the threshing roller clockwise rotation of top, and the threshing roller counter -clockwise turning of below, it is excessive that tooth on the corncob fixed gear is equipped with the circular arc, has compensatied the not enough of prior art, reasonable in design, convenient operation. 本实用新型公开了种玉米二次脱粒装置