Integrated Row Unit Hydraulic Control for Rapid Down Force Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing agricultural planters face challenges in maintaining consistent seed depth and adjusting row unit down force due to varying soil conditions, obstructions, and the need for rapid response, which current systems like air bag and hydraulic systems fail to address efficiently.
Innovation Solution
Agricultural row units equipped with a hydraulic cylinder and accumulator integrated into a single housing, allowing for rapid, independent adjustment of down force through a linkage assembly, controlled by a controller, enabling quick response to soil conditions and obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If air bag systems are used to provide down force, then uniform down force through vertical range is improved, but rapid response to soil conditions and obstructions deteriorates due to large air spring volume and hose cross section
Solution Approach 1:
The patent divides the planter into multiple independent row units, each with its own hydraulic down force control system. This segmentation allows each row unit to respond independently to soil conditions and obstructions, achieving both uniform down force control and rapid response without the limitations of large-volume air springs.
Solution Approach 2:
The patent replaces air bag systems with hydraulic cylinders and accumulators for down force control. The hydraulic system provides incompressible fluid actuation, enabling rapid response to changing conditions while maintaining uniform down force through precise pressure control. The accumulator provides instantaneous hydraulic fluid supply for quick response to obstructions.
2Ease of operation
If hydraulic cylinder with remote accumulator is used, then down force control is improved, but pressure spikes develop when hitting obstructions at high speed due to oil forcing through hoses to remotely located accumulator
Solution Approach 1:
The patent merges the hydraulic cylinder and accumulator into an integrated assembly mounted directly on each row unit. This eliminates long hydraulic hoses between the cylinder and accumulator, preventing pressure spikes when the planter hits obstructions at high speed. The integrated design maintains easy down force control while eliminating the pressure surge problem.
3Ease of operation
If combination spring-hydraulic shock absorbers are used, then down force control is improved, but force increases when rapidly striking foreign objects requiring row unit to quickly rise and come back down
Solution Approach 1:
The patent uses a hydraulic cylinder with accumulator system to replace spring-hydraulic shock absorbers. The hydraulic system provides controllable down force without the force multiplication effect of springs. When striking foreign objects, the hydraulic system allows the row unit to rise and return without excessive force increases, protecting planter components while maintaining control.
4Productivity
If multiple row units are used to increase planting width, then productivity is improved, but independent response of each row unit to soil conditions and obstructions becomes more complex
Solution Approach 1:
The patent segments the planter into multiple independent row units, each with its own hydraulic down force control system including cylinder and accumulator. This modular segmentation allows each row unit to respond independently to local soil conditions and obstructions while maintaining overall system manageability through standardized components and control architecture.
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
Enables precise and rapid adjustment of down force on each row unit, improving seed depth control and reducing mechanical stress, enhancing planting efficiency and yield by allowing independent operation of each unit, even in wide planters.
Implementation Method 1
A hydraulic cylinder is coupled to the linkage assembly and applies pressure to the linkage assembly
Implementation Method 2
hydraulic cylinder and accumulator integrated into a single housing, allowing for rapid, independent adjustment of down force
Data Source
AI summary
An agricultural row unit includes a linkage assembly that is pivotably coupled to an attachment frame. A hydraulic cylinder is coupled to the linkage assembly and applies pressure to the linkage assembly. A controller is mounted in the row unit such that is coupled to the hydraulic cylinder for controlling the pressure applied by the hydraulic cylinder.