Harvester Divider Point Torsional Bushing for Ground Following
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Solution Overview
Problem
Existing harvesting headers face issues with improper functioning of dividers, leading to ragged cuts, crop loss, and damage to the header due to inadequate ground contact and force distribution.
Innovation Solution
A harvesting header with a pair of end dividers, each equipped with a divider point mounted on a frame with a point down-pressure mechanism. This mechanism includes a torsional bushing that applies a biased down-pressure force to maintain the divider point in contact with the ground, preventing bouncing and ensuring proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a floating divider is used to follow the contour of the ground, then the divider can adapt to varying terrain conditions, but it may bounce or float over crop because of lack of force to hold it in the proper position
Solution Approach 1:
The divider point is made dynamically adjustable through a floating mechanism that allows vertical movement to follow ground contours. The mechanism includes a floating arm that can pivot and adjust its position based on terrain variations while maintaining crop contact through spring pressure and ground reaction forces.
Solution Approach 2:
The down-pressure force on the divider point is made variable through the floating mechanism. The amount of pressure changes dynamically based on ground conditions, crop density, and mechanism geometry. This allows the divider to maintain optimal contact force across varying terrain while preventing bounce and float-over conditions.
2Reliability
If the divider is made rigid to maintain proper positioning, then position stability is improved, but it may gouge the ground with the resulting force damaging the header
Solution Approach 1:
The divider mechanism is designed to be dynamically responsive rather than rigid. The floating arm can pivot and absorb ground reaction forces, preventing excessive downward pressure that would cause gouging. The mechanism adapts its stiffness and position based on real-time ground conditions while maintaining stable crop contact.
Solution Approach 2:
The floating mechanism acts as a cushion between the rigid header structure and the ground. It absorbs and dissipates ground reaction forces before they can damage the header, while still providing sufficient down-pressure to prevent divider bounce and maintain proper positioning during operation.
3Reliability
If down-pressure force is increased to prevent divider bounce, then position stability is improved, but the risk of header damage from ground reaction forces increases
Solution Approach 1:
The mechanism provides dynamic down-pressure control rather than static high force. The floating arm and spring system adjust pressure in real-time to match ground conditions, providing sufficient force to prevent bounce while avoiding excessive force that would damage the header structure.
Solution Approach 2:
The floating mechanism serves as an intermediary between the header and ground, mediating the interaction forces. It transmits only the necessary down-pressure to maintain divider contact while absorbing and isolating harmful ground reaction forces from the header structure, protecting it from damage.
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 solution effectively maintains the divider points in contact with the ground, preventing crop loss and header damage while ensuring a clean cut, even in varying terrain conditions.
Implementation Method 1
A torsional bushing is received in the sleeve, where the receiver arms are pivotably mounted to the bushing such that the torsional bushing is configured to apply a biasing down-pressure force to rotate the divider point towards the ground relative to the point mount plate.
Data Source
AI summary
A harvesting header has a point down-pressure mechanism for a divider point. The divider point is mounted on a receiver with a torsional bushing configured to apply a biasing down-pressure force to rotate the divider point. The down pressure mechanism has an upper stop and a lower stop formed as part of the pivot block. The upper stop and lower stop are oriented to form a mouth that is configured to receive the receiver tongue when the receiver is connected to the bushing, the lower stop engaging the receiver tongue to prevent the receiver from rotating downward beyond a preselected angle and the upper stop engaging the receiver tongue to prevent the receiver from rotating upward beyond a preselected angle such that the bushing enables pivoting motion of the receiver between a downward position and an upward position while providing a biased down-pressure force.