Draper Belt System Pivoting Roller Spacing
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Solution Overview
Problem
Harvester headers face challenges in increasing capacity while maintaining flexibility and reducing crop loss due to the need for wider headers and faster belt operation, which leads to increased wear, power costs, and maintenance issues, particularly with the constant gap between rollers causing uneven tension in the cutter bar during pivoting.
Innovation Solution
A draper belt system with first and second draper belt assemblies, where the first assembly can pivot relative to the second, maintaining a non-constant distance between rollers, thereby maintaining constant tension on the cutter bar and reducing compression changes during pivoting, without the need for a frame to lock the spacing between rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a constant gap is maintained between rollers through a locking frame, then the spacing between rollers is fixed, but the device complexity increases and maintenance becomes more difficult
Solution Approach 1:
The invention removes the complex locking frame structure entirely, allowing the first and second draper belt assemblies to pivot independently relative to each other. The gap between rollers varies naturally during pivoting without requiring any mechanism to maintain constant spacing, thus eliminating the source of maintenance problems while preserving the necessary pivoting functionality.
Solution Approach 2:
The invention transitions from a static constant-gap design to a dynamic variable-gap design. The distance between rollers of adjacent draper belt assemblies is allowed to change during pivoting operations, accommodating the dynamic requirements of terrain adaptation without mechanical constraints.
2Productivity
If the header is made wider to increase capacity, then more crop can be harvested, but the risk of crop loss through the pivot gap increases
Solution Approach 1:
The invention enables the header to dynamically adapt its configuration during operation. The draper belt assemblies can pivot independently to follow terrain contours, maintaining continuous crop flow paths and eliminating fixed gaps that would cause crop loss in wider headers.
3Productivity
If belts are driven faster to accommodate wider headers, then crop capacity increases, but wear and power costs increase
Solution Approach 1:
The invention allows the header to physically adapt its width and configuration to match terrain conditions, eliminating the need to continuously operate at maximum belt speed. The system can process variable crop volumes by adjusting its physical geometry rather than relying solely on increased operational speed.
Data Source
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AI summary
A draper belt system (122) is provided that includes a first draper belt assembly (124) with first and second rollers (128, 130), and a second draper belt assembly (126) with third and fourth rollers (134, 136). The third roller (136) of the second draper belt assembly (126) is disposed adjacent to the first roller (128) of the first draper belt assembly (124). The first draper belt assembly (124) is configured to pivot relative to the second draper belt assembly (126). Pivoting of the first draper belt assembly (124) results in a change in a distance between the first and third rollers (128, 136).