Agricultural Header Arm Tension Plate for Stable Cutter Bar Flex
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Solution Overview
Problem
The coupling of arms to the frame in agricultural headers becomes loose due to stretching of fasteners, inhibiting the flexing of the cutter bar assembly and affecting the performance of the header during harvesting, especially when encountering obstacles or varying field conditions.
Innovation Solution
Incorporation of a tension plate between the fasteners and the arm to maintain a tensioned coupling, ensuring the arm and mounting bracket assembly remain rigid, allowing the cutter bar assembly to flex and adapt to field contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fasteners are used to couple the arm to the mounting bracket assembly, then the arm is securely attached to the frame, but the fasteners stretch over time causing the coupling to become loose
Solution Approach 1:
The plate changes its physical state from rigid to flexible, allowing it to deform and maintain constant tension on the fasteners. This parameter change enables the coupling to remain secure while accommodating fastener stretching and arm flexing movements.
Solution Approach 2:
The plate acts as an intermediary element between the fasteners and the arm/mounting bracket assembly. It mediates the tension forces, distributing them evenly and maintaining constant pressure on the fasteners to prevent loosening while allowing the arm to flex.
2Stability of the object's composition
If the coupling between arm and mounting bracket assembly is made rigid, then the structural integrity is improved, but the cutter bar assembly cannot flex to adapt to field contours
Solution Approach 1:
The flexible plate introduces localized flexibility at the coupling point between the arm and mounting bracket assembly, while the rest of the structure maintains its rigidity. This allows the cutter bar assembly to flex locally to adapt to field contours without compromising the overall structural integrity of the header.
Solution Approach 2:
The plate transitions from a static rigid component to a dynamic flexible element that can deform in response to varying field conditions. This dynamic behavior allows the cutter bar assembly to adapt its position and maintain contact with the ground while the main structure remains stable.
3Reliability
If the fasteners are tightened to maintain tension, then the coupling stability is improved, but the fasteners may break due to excessive stress
Solution Approach 1:
The flexible plate serves as a cushioning element that absorbs and distributes stress before it reaches the fasteners. By deforming under load, the plate prevents stress concentration on the fasteners, reducing the risk of breakage while maintaining coupling stability during operation.
Solution Approach 2:
The plate's flexibility allows it to change its mechanical properties under stress, transitioning from a rigid load-bearing component to a compliant element that protects the fasteners. This parameter change enables the system to maintain stable coupling without subjecting the fasteners to excessive stress that would cause failure.
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 tension plate maintains a stable coupling between the arm and mounting bracket assembly, preventing fastener breakage and enabling the cutter bar assembly to flex as needed, ensuring consistent cutting height and performance across varying field conditions.
Implementation Method 1
a plate configured to flex to maintain a tension of the one or more fasteners with respect to the arm and the mounting bracket assembly
Data Source
AI summary
An arm assembly for an agricultural header includes an arm configured to rotate about a pivot axis relative to a frame of the agricultural header and configured to support a cutter bar assembly of the agricultural header. The arm assembly also includes a mounting bracket assembly configured to couple the arm to the frame, one or more fasteners configured to couple the arm to the mounting bracket assembly, and a plate configured to maintain a tension of the one or more fasteners with respect to the arm and the mounting bracket assembly.