Corn thresher

Abstract

The invention discloses a corn thresher comprising a feeding trough, threshing rollers, a vibrating screen, a cleaning fan, a motor and a rack. The corn thresher is characterized in that a front threshing roller and a rear threshing roller are arranged in parallel; the surface of the front threshing roller is provided with evenly-distributed spiral threshing corrugated tendons; a spiral grid notch board is arranged below the front threshing roller; a machine cover is arranged above the front threshing roller; a buffer cover board is hinged below the feeding windward of the machine cover and is connected with a buffer spring; the surface of the rear threshing roller is provided with spirally-arranged nail teeth; parallel grid notch boards are arranged below the rear threshing roller; and the machine cover is arranged above the rear threshing roller. The corn thresher has the advantages that the corn thresher can directionally feed without impact, flexibly rubs in sequence, threshes differentially by double rollers, has small damage on corn seed particles, has the advantages of high threshing rate, low breakage rate, compact structure, and wide applicability, is convenient to use and adjust, and can simultaneously satisfy requirements on commodity corn threshing and seed corn threshing.

Description

technical field [0001] The invention relates to an agricultural machine, in particular to a machine capable of threshing commercial corn and seed corn with low damage. Background technique [0002] The existing drum-type corn threshing machine uses the principle of high-speed impact to threshing corn. The threshing drum is the core component of the threshing machine. The ear of corn applies a blow that separates the kernels from the cob. The rotation speed of the drum is above 700r / min, the nail teeth or the linear speed of the outer edge of the drum is greater than 8~10m / s, and the corn ears are hit at high speed to achieve threshing. This kind of thresher does a lot of damage to corn kernels, especially the threshing of corn seeds is different from ordinary corn threshing. First, the shape of corn seeds is irregular, the shape of the ear and the ear and the shape of the grains are different, and the distribution of the grains on the ear The regularity is poor; the second...

AI Technical Summary

Problems solved by technology

During threshing, the blow effect of the teeth on the ear of corn is reduced, so the damage to the corn is reduced, but the threshing efficiency is reduced

[0004] But the existing drum-type corn thresher still has the following disadvantages: (1) The corn ear is in a disordered state when it starts to enter the threshing area, so it cannot be processed according to the optimal The method of force application is orderly threshing; (2) The threshing gap between the threshing drum, the concave plate and the casing is fixed, so the adaptability to the size of the ear of corn is poor, resulting in a large ear of corn and easy damage to the grain. The stress on small ears of corn is reduced, and the cleaning rate is low; (3) The hitting speed when the corn ears are fed is the same as the hitting speed after entering the threshing gap, so there is a contradiction between threshing damage and threshing efficiency, and it is difficult to solve the problem of reducing threshing. The problem of damage without reducing the threshing efficiency

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