A local natural vibration disc opener with three-way spline curve fitting teeth

Abstract

The invention discloses a local natural vibration disc opener with three-way spline curve fitting teeth, which is a key component of a no-tillage seeding and fertilizing machine and belongs to agricultural machinery. The opener mainly comprises a disc main body and ditching teeth; the ditching teeth are circumferentially and uniformly arranged by taking the geometric center of the disc main body as a circle center; the ditching teeth are divided into left ditching teeth and right ditching teeth which are adjacently staggered and symmetrically arranged according to the tooth surface shape. Each ditching tooth comprises a front blade surface, a rear blade surface and a spline curve fitting ABC surface; the included angle delta between the front blade surface and the radial line of the disc main body is 16-21 degrees, and the included angle theta between the rear blade surface and the radial line of the disc main body is 37.5-42.5 degrees; the spline curve fitting ABC surface is formed by sweeping and coupling special spline curves along the front blade surface BA edge and the rear blade surface BC edge, and the front blade surface has the minimum tooth thickness; and the ditching teeth follow a special spline curve rule with an increasing trend in the tooth thickness direction from B to A and from B to C. The self-ditching function is achieved, the ditching and stubble cutting resistance can be effectively reduced, and straw is prevented from being pressed into seed ditches; soil on the ditch wall and the ditch bottom is prevented from being compacted; and areas generated between the teeth and microscopic soil vibrate to loosen seed ditches, so that the ditching resistance is reduced, and the soil adhesion is reduced.

Description

technical field [0001] The invention is a key component for a no-tillage seeding and fertilizing machine, which belongs to the field of agricultural machinery, and mainly relates to a local self-vibrating disc opener with three-way spline curve fitting teeth. Background technique [0002] During no-tillage sowing and fertilization operations, there are a lot of crop residues on the surface, and the soil is heavy and firm. No-tillage sowing, fertilization and ditching mainly use disc openers, which rely on increasing the weight of the implements to force them into the soil, resulting in problems such as heavy design of implements, unreasonable tractor matching, and serious soil compaction. At the same time, the disc opener is easy to press crop residues into the seed ditch, causing the ditch wall and ditch bottom to be compacted, and the contact between the seed and soil is not tight, which seriously affects the emergence and growth of the seed. The positive pressure between...

AI Technical Summary

Problems solved by technology

No-tillage, sowing, fertilization and ditching mainly use disc openers, which rely on increasing the weight of the machine itself to force it into the soil, resulting in heavy design of the machine, unreasonable tractor matching, and serious soil compaction.

At the same time, the disc opener is easy to press the crop residue into the seed ditch, causing the ditch wall and ditch bottom to be compacted, and the contact between the seed and soil is not tight, which seriously affects the emergence and growth of the seed.

The positive pressure between the disc opener forced into the soil and the soil increases, which leads to soil adhesion on the surface of the ditching parts under the condition of heavy soil, which reduces the quality of ditching and even makes it impossible to work

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