Agricultural Header Float Arm System for Terrain Following
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Solution Overview
Problem
Agricultural headers face challenges in following changing ground topography, leading to inconsistent crop harvesting and potential damage to the cutterbar due to uneven contact with the ground, which results in reduced efficiency and increased maintenance needs.
Innovation Solution
The implementation of float arms pivotably coupled to a frame with biasing components, such as springs or fluidic cylinders, that bias the float arms away from the frame, allowing the cutterbar to follow the ground contour and maintain consistent cutting height, thereby improving terrain following and reducing the risk of cutterbar damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the header uses a rigid frame structure, then structural strength is improved, but the ability to follow ground contours deteriorates
Solution Approach 1:
The header frame is segmented into multiple float arms that can independently pivot relative to the main frame. Each float arm carries a section of the cutterbar and can adjust its position independently to follow ground contours, while the overall frame structure maintains its strength through the segmented design.
Solution Approach 2:
The float arms are made dynamic by allowing them to pivot freely on pivot pins, enabling the cutterbar sections to adapt to changing ground topography. The biasing components provide a dynamic restoring force that helps the float arms return to their neutral positions while maintaining continuous ground contact.
2Reliability
If the cutterbar is biased away from the ground, then the risk of cutterbar damage is reduced, but consistent crop harvesting is compromised
Solution Approach 1:
Biasing components (springs or hydraulic cylinders) are installed to apply a counteracting force that biases the float arms away from the ground. This prevents the cutterbar from being forced into the ground by uneven terrain, reducing damage risk while the float arm mechanism ensures continuous ground following for consistent harvesting.
Solution Approach 2:
The biasing force from the springs or hydraulic cylinders is adjusted to optimize performance. The biasing components can be tuned to provide the right amount of force to keep the cutterbar slightly elevated while maintaining ground contact, balancing damage prevention with harvesting consistency.
3Adaptability or versatility
If float arms are made pivotably coupled to allow ground following, then terrain following ability is improved, but structural stability deteriorates
Solution Approach 1:
The header is divided into segmented float arm sections that pivot independently on the main frame. This segmentation allows each section to adapt to local ground variations while the overall segmented structure maintains stability through distributed support points along the header length.
Solution Approach 2:
Pivot pins act as intermediaries between the float arms and the main frame, allowing controlled rotational movement. The pivot pins enable the float arms to follow ground contours while the friction and geometry of the pivot connections provide stabilizing moments that prevent excessive movement.
4Reliability
If biasing components are added to each float arm, then cutterbar protection is improved, but device complexity increases
Solution Approach 1:
Spring biasing components are used as they are simpler, more reliable, and require less maintenance compared to hydraulic systems. The springs provide sufficient biasing force for cutterbar protection without the complexity of hydraulic cylinders, fluid systems, or electronic controls.
Solution Approach 2:
The biasing components serve multiple functions: they bias the float arms away from the ground to prevent cutterbar damage, maintain consistent cutting height, and provide a restoring force for the float arm mechanism. This multi-functionality reduces the need for additional separate systems.
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
This solution enhances crop harvesting uniformity, maintains consistent stalk stubble height, and reduces the risk of cutterbar contact with the ground, leading to improved harvesting performance and reduced maintenance.
Implementation Method 1
a biasing component disposed between the float arm and the frame that biases the float arm away from the frame
Implementation Method 2
The biasing component may include a fluidic cylinder. The fluidic cylinder may include a pneumatic cylinder or a hydraulic cylinder.
Data Source
AI summary
Apparatuses and agricultural implements are directed to maintaining engagement of float arms of an agricultural implement with a ground surface, maintaining a consistent load distribution to the ground, and maintaining a height of a cutterbar of the agricultural implement at a selected distance of the ground. An agricultural implement may include a frame configured to couple to an agricultural vehicle, a float arm pivotably coupled to the frame, a cutterbar coupled to float arm, and a biasing component disposed between the float arm and the frame that biases the float arm away from the frame.