Simple castor-oil plant single-ear thresher

The utility model relates to a simple castor-oil plant single-ear thresher, which comprises a feeding hole, a cylindrical threshing cabin, a motor, a tapered rotary roller, a fan, a discharge hole, a seed collection hole, a rack, a slag hole, an adjustment valve, a baffle and a rubber cushion. The simple castor-oil plant single-ear thresher is arranged vertically, makes full use of gravity, and prevents castor-oil plants from being left in the threshing cabin; interfaces on the side wall of the threshing cabin overlaps and are not fixed, the adjustment valve is installed at the interface overlapping part, and size of the cylindrical threshing cabin is slightly adjusted by the adjustment valve, so distance between the cabin and the rotary roller is adjusted to satisfy requirements for threshing of capsules with different sizes, incomplete threshing is avoided and too many broken seed coats are avoided; and the threshing is realized through roller rotation and friction, shells and impurities are blown away by the fan, and the one-time threshing is realized. The simple castor-oil plant single-ear thresher in the utility model has the simple structure and high working efficiency, is operated conveniently, and solves the problems that the castor-oil plants inside the threshing cabin cannot be cleaned easily, mixing is caused in case of many materials, use is troublesome, the operations are relatively complicated, and the thresher cannot be used for castor-oil plant single-ear threshing easily.