Combined harvester sorting sieve with sieve piece spacing and oblique angle adjustable

Abstract

The invention relates to a combined harvester sorting sieve with sieve piece spacing and oblique angle adjustable. The sorting sieve includes a vibrating plate, a shear blade type spacing adjusting mechanism, wave-shaped sieve pieces, a jagged tailing sieve body, a lower sieve body, a spacing adjustment driving mechanism, cleaning sieve side walls, a tailing sieve adjusting plate and an eccentric rocking shaft; spacing adjustment devices are installed on the cleaning sieve side walls, and the spacing adjustment driving device is installed on the tailing sieve adjusting plate. The driving mechanism can drive the spacing adjusting mechanism to move through stretching out and drawing back of an extension end so as to increase or decrease the sieve piece spacing. The problem that after passing through a sieve, grains are inconsistent in uniformity is solved, and according to the need, the distance between each two sieve pieces in the different positions in the longitudinal direction of a sieve surface can be adjusted, so the sieve pieces in the different positions on the sieve surface can possess the respective optimum spacing; the lower ends of the wave-shaped sieve pieces can adjust the sieve piece oblique angle by hooking springs, and oblique angle change can guide air flow of a draught fan to fully pass through the sieve; at the same time, the novel wave-shaped sieve pieces solve the problems that grass is easily hooked on the tip of a traditional fish scale sieve and the sieve is easily stuck and blocked.

Description

technical field [0001] The invention relates to a combined harvest cleaning sieve with adjustable sieve gap and opening, which can be widely used in cleaning devices for rice, wheat and other crops to improve the cleaning efficiency. Background technique [0002] Threshing and cleaning is the core mechanism of the combine harvester. The performance of the threshing and cleaning mechanism directly affects the performance of the whole machine and the cleaning effect of the combine harvester. The vibrating screen is an important part of combine harvester threshing and cleaning. During the cleaning process of the traditional fish scale sieve, due to the influence of the tip of the sieve scale, it is easy to cause the phenomenon of hanging grass: the stalks, glumes, light debris, etc. falling from the drum hang on the tip of the fish scale, and it is difficult to fall, causing the sieve surface stem The stalks are piled up, and the cleaning efficiency of the cleaning sieve drops...

AI Technical Summary

Problems solved by technology

In Chinese patent CN104737721 A, in order to solve the problem of non-adjustable opening, a fish scale screen opening adjustment mechanism is proposed, and the fish scale screen is pulled by the extension shaft of the electric cylinder to achieve the purpose of adjusting the opening.

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