Mower roller assembly

Abstract

The invention relates to an apparatus part used for shearing and crushing plant stems, and particularly relates to a knife roller assembly for a straw cutter. The knife roller assembly for the straw cutter comprises a rotatable knife roll and a plurality of fly-cutters which are arranged on the knife roll; a plurality of longitudinal knife sinking surfaces are distributed on a circumference of the knife roll, wherein an included angle of 2-4 degrees is formed between each knife sinking surface and a generatrix of a cylinder of the knife roll; the fly-cutters are arranged on the knife sinking surfaces; the fly-cutter on each knife sinking surface is composed of two separate sections; and the radial positions of blade straight lines of two sections of fly-cutters can be adjusted independently. According to the knife roller assembly for the straw cutter, the fly-cutters vertically penetrating the whole knife roll is decomposed to two fly-cutter sections in shorter length; the fluctuation range of fit clearance of the fly-cutters and the blade of a bottom knife in the length of the whole knife roller is greatly reduced by independent adjustment of the two sections of short fly-cutters, so as to obtain a better shearing effect.

Description

technical field [0001] The invention relates to an equipment component for cutting and crushing plant stems, in particular to a blade roller assembly of a lawnmower. Background technique [0002] Knife roller grass cutter is a traditional product, which is used to cut various grass raw materials in the material preparation section of pulp and paper making enterprises. Its cutter roller assembly includes a cutter roller and a plurality of flying knives running through the cutter roller evenly arranged on the circumference of the cutter roller. Grass material in the cutting area is cut. In order to reduce the impact of the cutting action of the flying knife and the bottom knife cutting the grass, the flying knife is usually installed obliquely on the knife roller, that is, the straight edge of the flying knife and the generatrix of the cylinder of the knife roller form an angle of 2-4°, and the flying knife The straight edge of the bedknife does not contact at the same time,...

AI Technical Summary

Problems solved by technology

The edge of the bottom knife and the flying knife are both straight lines when viewed from the length direction, but due to the inclined installation of the flying knife, the straight edge of the flying knife does not form a cylinder with the rotation track of the knife roller. When the gap is the smallest, the straight edge of the flying knife is a concave rotating body with the rotation track of the knife roller, and the total length of the edge of the bottom knife cannot be completely matched with it, resulting in small gaps at both ends and large gaps in the middle.

For cutting brittle raw materials such as wheat straw, the uneven knife-edge gap has little effect, but it has a greater impact on cutting tough raw materials such as straw and asparagus, resulting in continuous cutting or poor cutting quality at places with large gaps, which cannot meet the requirements. Subsequent section requirements

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