Header Float Arm Pressure Control for Ground-Following Cutter Bars
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hinged draper headers experience issues with float arms lifting and engaging with the ground during harvesting, leading to damage to the field and headers due to the formation of ruts and reduced crop harvest quality.
Innovation Solution
A system for controlling float arms between locked and unlocked configurations using pressurized fluid sources and proportional valves to manage the angular range and position of float arms, allowing the cutter bar to flex and conform to ground topography, thereby preventing engagement with the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If float arms are kept in locked configuration to maintain header stability, then header stability is improved, but the cutter bar cannot flex to follow ground contours, leading to ground engagement and damage
Solution Approach 1:
The system dynamically switches the float arm between locked and unlocked configurations based on operational conditions. The first valve controls fluid pressure to lock the float arm in position for stability, while the second valve releases pressure to unlock the float arm, allowing the cutter bar to flex and follow ground contours. This dynamic switching resolves the contradiction between maintaining stability and enabling adaptability.
2Adaptability or versatility
If float arms are allowed to move freely in unlocked configuration to follow ground contours, then adaptability is improved, but header stability deteriorates, causing excessive movement and potential damage
Solution Approach 1:
The system uses controlled dynamic switching between locked and unlocked states. The first valve applies fluid pressure to lock the float arm when stability is needed, while the second valve releases pressure to unlock for flexibility. This controlled dynamics approach ensures the cutter bar only moves when intentionally unlocked, preventing excessive movement while maintaining adaptability when needed.
3Reliability
If high fluid pressure is applied to lock float arms, then locking reliability is improved, but the risk of unintended engagement with ground increases due to reduced flexibility
Solution Approach 1:
The system incorporates feedback through the controller that monitors the state of the first and second valves, fluid pressure levels, and float arm position. This feedback mechanism ensures that high pressure is applied only when the float arm needs to be securely locked, and pressure is released when flexibility is required, thereby maintaining locking reliability while minimizing the risk of ground engagement.
4Manufacturing precision
If the system uses complex valve control mechanisms to manage float arm position, then position control precision is improved, but device complexity increases
Solution Approach 1:
The system uses fluid pressure as an intermediary between the valve control mechanisms and the float arm position. The first and second valves control fluid pressure to indirectly control the float arm position, providing precise control while simplifying the mechanical linkage. This intermediary approach reduces the complexity of direct mechanical control while maintaining position control precision.
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 system maintains harvest quality by allowing the cutter bar to follow ground contours, reducing the risk of pushing and associated damage, and ensuring stable operation of the header.
Implementation Method 1
a first source of pressurized fluid in communication with the first valve, the first source of pressurized fluid including a first fluid at a first fluid pressure
Implementation Method 2
a second source of pressurized fluid in communication with the first valve, the second source of pressurized fluid including a second fluid at a second fluid pressure
Implementation Method 3
a second valve in fluid communication with the second source of pressurized fluid. The second valve is configured to adjust a fluid pressure at the first location along a pressure range
Data Source
AI summary
Systems, methods, and apparatus for controlling a position of one or more float arms in response to operation of a gauge wheel or in response to an input are described. In some instances, a float arm is moved to a selected position automatically in response to extension or retraction of a gauge wheel. In some instances, a position of a float arm in an unlocked configuration is altered in response to an input, such as a user input. In some instances, a position of the float arm is controlled in response to application of fluid pressures, such as hydraulic pressure. Fluidic pressure may be altered in response to changing a position of one or more valves.