Combined harvester for cereals

Abstract

The invention discloses a combined harvester for cereals, and belongs to the field of crop harvesting. The combined harvester comprises a cutting table, a threshing separation part and a cereal cleaning part. The threshing separation part comprises threshing rollers distributed in a longitudinal axial flow threshing manner. An open type rear cylinder of each threshing roller comprises a roller shaft coaxially connected with a closed conical front cylinder, flanges connected with two ends of the roller shaft, and a plurality of threshing toothed rods circumferentially arranged on the roller shaft and connected with the flanges; each of some threshing toothed rods is provided with a rasp-bar toothed rod and a plurality of grass discharge teeth, and each of some threshing toothed rods is provided with a combined toothed rod and a plurality of grass discharge teeth; the combined toothed rod is composed of a plurality of threshing teeth and a plurality of arc-shaped elastic teeth alternatively arranged at intervals; the cereal cleaning part comprises a volute centrifugal fan adopting arc blades, and a reciprocating vibration sieve with a dual-layer mesh grid and a straw walker. The combined harvester provided by the invention effectively controls dropping of rice spikes of the cutting table, and is long in threshing time, large in separation area, reduced in collection of green stems and leaves sticking on sieve, convenient to dismount and mount, and strong in cleaning capacity.

Description

technical field [0001] The invention relates to the technical field of crop harvesting, in particular to a millet combine harvester. Background technique [0002] In recent years, with the promotion of domestic high-quality hybrid millet and the substantial increase in market demand for miscellaneous grains, millet production has begun to be emphasized and expanded, and farmers' production income and planting enthusiasm have also greatly increased. However, the biggest "bottleneck" affecting millet production at present is harvesting. [0003] Millet is a small crop, the stalks are green and mature, the mature ears hang down and are entangled with each other, and the ears on both sides of the header are seriously twisted; the grains of the ears are small and light, and it is difficult to separate the grain and the stems during harvesting, and the grains are not easy to fall off. Clean, high entrainment and cleaning loss rate, serious damage and other prominent problems. ...

AI Technical Summary

Problems solved by technology

However, the roller must be disassembled when the integral concave plate structure is disassembled, which is inconvenient to disassemble and assemble, and the concave plate structure will wear to different degrees at different positions as the usage time increases, and the entire concave plate needs to be replaced, resulting in high maintenance costs.

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