Grain combine harvester

Abstract

The invention belongs to the field of agricultural mechanical equipment, and particularly relates to a grain combine harvester. The grain combine harvester comprises a machine shell, a threshing cylinder, a grading sieve and a straw shredding device, wherein the threshing cylinder comprises a conical feeding cylinder body, a threshing cylinder body and a cylinder shaft, the conical feeding cylinder body is arranged at the front end of the threshing cylinder body, a feeding auger blade is installed on the conical feeding cylinder body, a weed discharging auger with a spiral blade is installed at the rear end of the threshing cylinder body, and threshing spike teeth are installed on the circumference of the threshing cylinder body; the front-end swing diameter of the feeding auger blade is larger than the rear-end swing diameter of the feeding auger blade and is matched with the width of a harvester header conveying gap bridge, the rear-end swing diameter of the feeding auger blade is matched with the front-end swing diameter of the threshing cylinder body, the straw shredding device is installed in the machine shell, and a straw outlet of the weed discharging auger is connected with the straw shredding device through a channel. By the adoption of the harvester, blocking during crop feeding and straw discharging is avoided, and normal working of the grain combine harvester is ensured.

Description

technical field [0001] The invention relates to a grain combine harvester, which belongs to the field of agricultural machinery and equipment. Background technique [0002] The existing grain combine harvester threshing drum has a squirrel-cage shape or a cylindrical shape, and the threshing element has a bar or a nail tooth, etc., and the arrangement on the harvester is horizontal or vertical, and the front end of the vertical axial flow threshing drum is provided with The feeding auger is equipped with a grass discharge device (grass discharge plate arranged along the axial direction) at the rear end. However, the blades of the feeding auger with vertical axial flow threshing drums on the market usually use equal-diameter blades, that is, the diameter of the front end of the blade is the same as the diameter of the harvesting auger. The difference in the width of the bridge conveyed by the machine header is large, and it cannot effectively absorb all the crops conveyed acr...

AI Technical Summary

Problems solved by technology

Since the shredder is installed behind the cleaning sieve, in order to ensure the disassembly of the cleaning sieve during maintenance, a certain position must be reserved for the installation of the straw shredder, which results in a long channel for the straw to enter the shredder (usually is about 100cm), so the whole body is also longer

In addition, only the moving knife of the shredder rotates, and the fixed knife does not move, so the shredding load is heavy and it is easy to block

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