Grass separator between threshing cylinder and escape grid of head-feed reaper

Abstract

The invention relates to a grass separator between a threshing cylinder and an escape grid of a head-feed reaper, which belongs to a millet-grass processing component and has the structure that a cylinder semicircular cover (2) is installed above the threshing cylinder (1), the inner side of the cylinder semicircular cover (2) is circumferentially divided into a plurality of spiral guiding gutters(6) by a plurality of guiding plates (5), and a grass air flow channel is formed between each spiral guiding gutter (6) and the threshing cylinder; and the final spiral guiding gutter (6) above the end of the threshing cylinder (1) is connected with a guiding gutter (8). The grass separator can throw more than 60% of the grass to a position above the threshed straws and expel the grass along withthe centrifugal force produced by the high-speed rotation of the threshing cylinder. The grass separator reduces the area of a cleaning vibration sieve, greatly reduces the grass expelling load of the vibration sieve and is suitable for the small-size development of head-feed reapers.

Description

technical field [0001] The invention relates to a grain and grass processing part of a harvester, in particular to a hair and grass separation device between a threshing drum and a concave screen of a half-feed harvester. Background technique [0002] The hair grass produced by the existing half-feeding rice-wheat combine harvester threshing cylinder is all discharged by the vibrating screen, such as the combine harvesters produced by Japan's Kubota, Yanmar, Korea Dongyang and domestic manufacturers, mostly adopt this device. Because the fur between the threshing drum and the concave plate screen moves in a high-speed circular motion and moves backward under the action of the drum threshing teeth and the top guide bar, all of them enter the vibrating screen, which increases the draft load of the vibrating screen and restricts half-feeding. The miniaturization of combine harvesters has become one of the obstacles to the development of small half-feed combine harvesters. Con...

AI Technical Summary

Problems solved by technology

Because the fur between the threshing drum and the concave plate screen moves in a high-speed circular motion and moves backward under the action of the drum threshing teeth and the top guide bar, all of them enter the vibrating screen, which increases the draft load of the vibrating screen and restricts half-feeding. The miniaturization of combine harvesters has become one of the obstacles to the development of small half-feed combine harvesters

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