Variable-curvature soil-desorption/resistance-reduction disc harrow

Abstract

The invention provides a variable-curvature soil-desorption/resistance-reduction disc harrow. The variable-curvature soil-desorption/resistance-reduction disc harrow comprises a disc harrow body which is of an integrated structure and uniform in thickness; an assembly part for connecting with a power device is arranged at the center of the disc harrow body; a cutting blade for breaking soil is arranged at the outer peripheral surface of the disc harrow body; disconnected circular-shaped cutting edges are evenly distributed on the cutting blade; the two convex and concave surfaces, arranged oppositely, of the disc harrow body are an outer soil contacting curved surface and an inner soil contacting curved surface, respectively; the inner soil contacting curved surface is a curved surface obtained based on 360-degree continuous rotating movement of a lead curve around the center of the disc harrow body, and the lead curve conforms to the equation f(x)=0.0008x4-0.0406x3+0.7596x2-7.2044x+0.4422, wherein the numerical area of x is within the range of 0-18. The variable-curvature soil-desorption/resistance-reduction disc harrow has the advantages that the variable-curvature inner soil contacting curved surface is attached on the disc harrow so that the contact probability of soil particles with the surface of the disc harrow is reduced, and the resistance and the adhesion of the soil to the surface of the disc harrow are decreased.

Description

technical field [0001] The invention relates to a disc harrow used for agricultural soil preparation machinery, in particular to a disc harrow with variable curvature for soil removal and drag reduction. Background technique [0002] Soil preparation machinery is also called topsoil tillage machinery. There are many types, and the common ones are disc harrow, nail-tooth harrow, compactor, power-driven harrow, paddy field harrow, and paddy field-driven harrow. Disc harrows are mainly used for crushed soil and flat ground after plowing, and can also be used for soil stirring, weeding, composting, shallow plowing and stubble removal after harvest, loosening soil before sowing, and covering seeds after airborne sowing. One of the most widely used tools in machinery. But the soil-touching curved surface of the traditional disc harrow is designed as a spherical surface, that is, each point on the soil-touching curved surface has equal curvature radius or equal curvature. During ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem of high working resistance of the existing disc harrow and low plowing efficiency due to severe clay, and to provide a variable-curvature disc harrow that improves the geometric shape of the disc harrow's surface touching the soil.

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