Multilayer segmentation-stubble leaving cutting knife device of first-crop ratooning rice, control method of multilayer segmentation-stubble leaving cutting knife device, and combine harvester of first-crop ratooning rice

Abstract

The invention provides a multilayer segmentation-stubble leaving cutting knife device of first-crop ratooning rice, a control method of the multilayer segmentation-stubble leaving cutting knife device, and a combine harvester of the first-crop ratooning rice. The multilayer segmentation-stubble leaving cutting knife device of the first-crop ratooning rice comprises a cutting table, segmentation cutting knives and stubble leaving cutting knives, wherein the cutting table is used for cutting ratooning rice ear heads; at least one segmentation cutting knife is positioned at the lower back side ofthe cutting table; the segmentation cutting knives are hinged onto a walking chassis; the cutting height of the segmentation cutting knives is controlled through a second executing mechanism, and thesegmentation cutting knives are used for cutting field returning stems; the stubble leaving cutting knives are positioned at the lower back sides of the segmentation cutting knives, and are hinged onto the walking chassis; and the cutting height of the stubble leaving cutting knives is controlled through a third executing mechanism, and the stubble leaving cutting knives are used for cutting upper part stubble leaving stems. The harvesting operation on the ear heads only having a small number of stems can be realized, and meanwhile, the rice stubble height and the field returning stem lengthcan be ensured, so that the size of devices such as the cutting table, a screw conveyer and a conveying groove of the combine harvester can be greatly reduced; and the small-size and light-weight design of the combine harvester is realized.

Description

technical field [0001] The invention relates to the field of agricultural machinery or the field of ratooning rice machinery, in particular to a multi-layer segmentation-stubble cutter device and control method for first-season ratooning rice and a combine harvester for first-season ratooning rice. Background technique [0002] Ragnarok rice is a special rice planting model, which is suitable for areas where the sunlight and heat are not enough to grow double-cropping rice, but there is more than enough single-cropping rice. With many advantages, it is an important measure to improve the multi-cropping index of land and ensure food security in our country, and has great promotion prospects in our country. The harvest period of ratooning rice is divided into two seasons. When the first season of rice is harvested, the lower third of the plant (rice stump and root system) needs to be preserved, and after fertilization and cultivation, let it grow another season of rice. At pr...

AI Technical Summary

Problems solved by technology

At present, the first season of ratooned rice is mainly harvested manually or by using existing harvesters. The main problems are: manual harvesting is time-consuming and laborious, while harvesting with existing harvesters has a high rolling rate (40%-50%), Problems such as large damage to rice piles have seriously restricted the promotion and planting of ratooning rice

[0003] The Chinese patent discloses a four-wheel-drive low-rolling ratooned rice harvester, which includes high clearance four-wheel drive chassis, header, conveying parts, threshing parts, granary and other components. The rolling rate can reduce the damage of the chassis to the rice pile, but the work efficiency is low; the Chinese patent discloses a kind of driving wheel variable wheel pitch regeneration rice harvester, including a chassis, a pair of front wheels are arranged at the front end of the chassis, and a pair of front wheels are arranged at the rear end of the chassis. Rear wheels, the two sides of the bottom of the front end of the chassis are respectively provided with telescopic mechanisms that control the lateral movement of the front wheels on the corresponding side, and a Taihe threshing device is also provided at the front end of the chassis. Avoidance, but because it uses ordinary road wheels, it cannot meet various production conditions, and the machine does not have a grain tank, so the work efficiency is low

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