Spiral squeezing-rubbing type corn thresher high in threshing rate and low in breaking rate

The invention discloses a spiral squeezing-rubbing type corn thresher high in threshing rate and low in breaking rate. The thresher comprises a housing, a hopper, four supporting columns, a spiral plate tooth rotating shaft, a squeezing-rubbing cylinder, a core guiding chamber and a grain discharging port, wherein the hopper is arranged at the left end of the upper surface of the housing, the bottom of the hopper is fixedly connected with the housing through nuts, and the supporting columns are arranged at the right end of the bottom of the housing. According to the thresher, the spiral platetooth rotating shaft and the squeezing-rubbing cylinder are arranged, the position of the squeezing-rubbing cylinder is fixed, the spiral plate tooth rotating shaft rotates to carry out frictional threshing on corncobs, and thus the corn grain breaking rate is low; spiral teeth are arranged on the spiral plate tooth rotating shaft and conduct rightward guiding movement during corncob friction, andthe right end of the sque