Design of novel vertical roll maize thresher
                                            ZHANG Wenbin1,2, YU Libin1,2, JIANG Jie1,2, GUO Dewei1,2, MIN Jie1,2
(1.College of Engineering, Honghe University, Mengzi 661199, China; 2.Key Laboratory of Mechanical Performance Analysis and Optimization of Plateau in Yunnan Province, Mengzi 661199, China)

Abstract: Aiming at the problem of high damage and breakage rate of maize ears in traditional maize thresher, the method of agitation and impact on maize ears by coronal flat teeth mounted on highspeed spindle in threshing operation was studied. The threshing mechanism was improved and designed, and a new type of vertical roller maize thresher was put forward. The vertical rollers was used to thresh maize, and the trapezoidal cavity formed by conical cage core and outer barrel were combined, which made the force of maize in the threshing barrel uniform, and made full use of the gravity of the corn cobs and the downward axial force produced by the rollers to flow out quickly, so the separation of corn kernels and corncobs could be realized. The results indicate that the machine solves the problem that common maize threshers are easy to break and kernels. It can fully meet the requirements of highdedusting, lowbreaking, lessbroken cobs and highefficiency threshing operation of maize ears. It meets the domestic design standards.

Key words: vertical roll; maize thresher; design; novel; conical cage core