Eccentric tangential-flow primary threshing and separating device of rice combination harvester

Abstract

The invention provides an eccentric tangential-flow primary threshing and separating device of a rice combination harvester. A tangential-flow threshing roller, a concave plate sieve and a top cover are installed on a rack; a support shaft and transmission shaft of the tangential-flow threshing roller penetrate through a left plate and a right plate respectively, an eccentric shaft is located between the left plate and the right plate, and the two ends of the eccentric shaft are connected with the transmission shaft and the support shaft respectively; the center of the transmission shaft and the center of the support shaft both coincide with the rotating center of the threshing roller, so that a certain eccentricity exists between the center of the eccentric shaft and the rotating center of the threshing roller, and a certain angle exists between the horizontal plane and the connecting line of the two centers. When the threshing roller works, a threshing element begins to stretch out above a feeding opening of the tangential-flow threshing roller and draws back into the threshing roller near a longitudinal axial flow feeding opening, back-drawing of rice by the threshing element is effectively reduced, and the problem of unsmooth feeding at the intersection place between tangential flow and longitudinal flow is solved; meanwhile, the partial resistance torque produced by materials is balanced by the torque produced by the centre-of-gravity shift of the tangential-flow roller, the vibration of the tangential-flow threshing roller is reduced, the work performance is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of agricultural equipment, and relates to a threshing and separation device for a combine harvester, in particular to an eccentric cut-flow initial separation device for a rice combine harvester. Background technique [0002] The tangential flow drum is an important structure connecting the conveying trough feeding and the longitudinal axial flow threshing and separating drum. It is mainly used for the initial separation of the high-maturity and easy-to-thresh grains, and at the same time feeds the rice after the initial separation to the longitudinal axial flow threshing. In the device, its working performance seriously affects the working performance of the whole machine and the harvest quality. [0003] Chinese patent CN201020277026.8 (threshing and separating device combined with cutting and longitudinal) discloses a tangential flow threshing device. The feeding screw is fixedly set in the front section...

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that in the prior art, the cross-flow threshing device often has poor feeding at the intersection of the cross-cut and longitudinal flow, the blockage and belt-back are relatively serious, and the cross-flow drum bears a large eccentric load in the process of initial detachment, separation, and feeding. Larger eccentric vibration and other problems are generated. The present invention provides an eccentric cutting flow primary detachment device for rice combine harvesters, so that the threshing elements can be retracted into the threshing drum near the longitudinal axial flow feeding inlet, reducing the threshing elements to the paddy. At the same time, using the eccentric shaft to generate torque to the center of rotation of the cutting-flow threshing drum to balance the resistance moment generated by some rice, effectively solve the problem of poor feeding and The problem of bringing back rice, reducing the vibration of the cross-flow threshing drum, improving the working performance and service life of the cross-flow threshing device and combine harvester

Images