Ripper Plough Lateral Thrust for Deep Soil Fracturing
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Solution Overview
Problem
Conventional tillage implements are ineffective in deep soil loosening, especially in cohesive and wet soils, due to reliance on tensile failure and passive earth pressures, resulting in limited depth and volume of soil loosened, and are inefficient in soils impacted by industrial activities.
Innovation Solution
A ripper plough design with a ploughshare support and ploughshares that apply a combination of lateral and vertical forces, optimizing active earth pressures to increase the volume of soil loosened and strain required for fracture, with a plough angle of 40-55 degrees and thrust angle of 40-50 degrees, allowing deeper and wider soil tillage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional tillage implements use thin narrow blades to slice through soil at specific depth, then the implement can move through soil efficiently, but the depth of tillage is limited and the volume of soil loosened is small
Solution Approach 1:
The patent transitions from conventional two-dimensional slicing (thin blade cutting vertically) to three-dimensional fracturing by adding lateral thrust capability. The ground-engaging portion is designed to apply forces in multiple directions (vertical, lateral, and forward), creating a volumetric fracture zone rather than a narrow slit, thereby significantly increasing the volume of soil loosened.
Solution Approach 2:
The implement divides the soil fracturing function into multiple ground-engaging portions arranged in a specific pattern. Each portion contributes to fracturing soil in a different zone, and their combined action creates an overlapping fracture pattern that expands the total volume of loosened soil without requiring a single complex blade design.
2Adaptability or versatility
If conventional subsoilers rely on tensile failure in vertical planes, then the implement can loosen soil in dry conditions, but the method is ineffective in cohesive and wet soils with massive structure
Solution Approach 1:
The patent changes the fundamental mechanism of soil failure from tensile failure (conventional) to shear and compressive failure. By designing ground-engaging portions that apply lateral and vertical thrust, the implement creates active earth pressures that induce shear failure planes, which are effective in cohesive and wet soils where tensile strength is negligible. This parameter change in failure mechanism enables reliable performance across varying moisture conditions.
Solution Approach 2:
Instead of relying on the soil's natural tensile failure planes (conventional approach), the patent inverts the approach by applying lateral thrust to create artificial shear failure planes. This inversion of the failure mechanism allows the implement to effectively till massive and cohesive soils that would otherwise be resistant to conventional tensile-based tillage methods.
3Productivity
If deep tillage is performed to loosen compacted subsoil, then soil aeration and hydrology improve, but surface soil may be displaced or lost
Solution Approach 1:
The patent extracts the surface soil protection function from the deep tillage operation. By positioning ground-engaging portions to fracture soil at depth without creating continuous vertical slits that reach the surface, the implement isolates the deep loosening action from surface soil disturbance. The fracturing is confined to subsurface zones, leaving surface soil intact and preventing topsoil loss while still achieving deep aeration and hydrology improvement.
4Productivity
If larger agricultural machines are used to increase production, then tillage depth and capability increase, but compaction, shearing, and rutting of subsoil worsen
Solution Approach 1:
The patent converts the harmful effect of heavy machine trafficking (which creates compaction and massive soil structure) into a beneficial opportunity. By designing an implement specifically effective in massive and cohesive soils, the patent enables deep tillage of soils that have been severely compacted by large machines, thereby rehabilitating the damaged soil structure and converting the previously harmful compacted state into a treatable condition that restores aeration and root penetration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ripper plough effectively loosens a greater volume of soil across a range of moisture conditions, minimizing topsoil displacement and improving soil aeration and hydrology, suitable for reclaimed soils and construction applications.
Implementation Method 1
optimizing active earth pressures to increase the volume of soil loosened and strain required for fracture
Implementation Method 2
The fracture plane from its outer edge to the soil surface is normally an angle less than 45 degrees from vertical
Implementation Method 3
As soil becomes more massive and/or wetter, the more likely the soil will generally deform and flow around the shank
Data Source
AI summary
A ripper plough for soil tillage includes a body having an upper mounting attachment end, a lower soil engaging end, a leading edge, a trailing edge, and opposed sides. A ploughshare support extends outwardly from the body from the leading edge toward the trailing edge at a plough angle of between 40 degrees and 55 degrees and extends outwardly and downwardly relative to the body at a thrust angle of between 40 degrees and 50 degrees. Ploughshares are mounted on the ploughshare support. The ploughshares have a length between a leading edge and a trailing edge of at least 1.5 feet and are spaced apart at the trailing edge by at least two feet, to provide an average lift angle of upward lift of between 10 degrees and 15 degrees.