Harvesting Header Frame Continuous Beam Truss Design
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Solution Overview
Problem
As harvesting headers increase in width, they experience increased deflection due to structural flexing, making it difficult to maintain a straight orientation for proper operation, and existing solutions concentrate stresses at interfaces leading to potential frame failure or the need for additional reinforcement.
Innovation Solution
A harvesting header frame design featuring a top beam extending across the full width with continuous bottom beam and vertical main structures, connected by diagonal truss members, which provides structural support and reduces deflection by distributing loads more evenly through the center feederhouse interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the header width is increased to reduce the number of passes through the field, then the productivity is improved, but the deflection of the header increases making it difficult to maintain straight orientation
Solution Approach 1:
The header frame is divided into multiple sections (inner section and outer sections) with distinct support beam configurations. The inner section has central support beams spaced outwardly from the midpoint, while outer sections have support beams arranged at or adjacent to the outer ends, creating a segmented truss-like structure that reduces deflection across the increased header width
Solution Approach 2:
The patent introduces vertical support beams and diagonal braces connecting the top and bottom beams, adding a vertical dimension to the structural support. This three-dimensional truss configuration provides additional rigidity and resistance to deflection, enabling the header to maintain straight orientation despite increased width
2Productivity
If the header width is increased to reduce the number of passes through the field, then the productivity is improved, but the structural flexing increases
Solution Approach 1:
The header frame is divided into multiple sections (inner section and outer sections) with distinct support beam configurations. The inner section has central support beams spaced outwardly from the midpoint, while outer sections have support beams arranged at or adjacent to the outer ends, creating a segmented truss-like structure that reduces deflection across the increased header width
Solution Approach 2:
The header frame uses a composite structural design combining top beams, bottom beams, vertical support beams, and diagonal braces to create a multi-component truss system. This composite arrangement provides enhanced structural rigidity and resistance to flexing, enabling the header to maintain its shape despite increased width
3Ease of manufacture
If separate support beams are used in inner and outer sections, then the manufacturing is simplified, but stress concentration occurs at the interfaces leading to frame failure
Solution Approach 1:
The patent merges the support beam structure into a continuous configuration where the top beam and bottom beam extend continuously through the center area of the header. The vertical support beams and diagonal braces are integrated into this continuous structure, eliminating the interfaces between separate sections and the associated stress concentrations that lead to frame failure
Data Source
AI summary
A frame for a harvesting header has a top beam extending across substantially a full width of the harvesting header and has ends arranged adjacent respective ends of the harvesting header and a midpoint in a center area of the harvesting header. The header frame has a bottom beam substantially parallel to the top beam extending less than the full width of the harvesting header and having a midpoint in the center area of the harvesting header. Vertical main structures connect the top and bottom beams. Diagonal truss members connect the ends of the top beam and interfaces of the bottom beam and vertical main structures. The vertical main structures form a feederhouse interface at the center area of the harvesting header. The top beam and bottom beam are continuous through the center area of the harvesting header. Header drive assemblies are mounted at the ends of the bottom beam.