Combine Head Frame Diagonal Beam Load Distribution
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Solution Overview
Problem
Combine heads are challenged by the need for increased width to harvest more rows efficiently, which requires stronger and stiffer frames, leading to increased weight and potential damage from inertial resistance, necessitating a solution to distribute forces and reduce weight.
Innovation Solution
The combine head frame design incorporates a laterally-extending upper and lower beam with diagonal and vertical descending beams, along with inhomogeneous upper beam construction using a central stronger member and weaker wing portions, and a plurality of gussets between the row unit and lower back beams to distribute loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the combine head width is increased to harvest more rows, then productivity is improved, but the frame weight must be increased to maintain structural strength
Solution Approach 1:
The frame is divided into multiple segments including upper beams, lower beams, lateral beams, and diagonal beams that work together to distribute loads. This segmentation allows each component to be optimized for its specific function rather than requiring the entire frame to be uniformly heavy.
Solution Approach 2:
The frame utilizes composite construction with different beam types (upper, lower, lateral, diagonal) made from appropriate materials and configurations to achieve optimal strength-to-weight ratio for each structural requirement.
2Strength
If the frame is made stronger and stiffer to support increased width, then structural integrity is improved, but the weight increases and inertial resistance increases
Solution Approach 1:
Diagonal beams are incorporated into the frame structure to preemptively counteract inertial forces and vibrations before they can cause damage. These beams are positioned to intercept and redirect forces generated during operation, preventing structural failure without requiring excessive weight.
Solution Approach 2:
The frame transitions from a simple rectangular configuration to a three-dimensional truss structure with diagonal elements adding a new dimensional aspect to force distribution. This spatial arrangement creates triangular configurations that inherently provide greater structural efficiency.
3Reliability
If the frame weight is increased to support wider combine head, then structural integrity is improved, but damage from inertial resistance increases
Solution Approach 1:
Diagonal beams are incorporated into the frame structure to preemptively counteract inertial forces and vibrations before they can cause damage. These beams are positioned to intercept and redirect forces generated during operation, preventing structural failure without requiring excessive weight.
Solution Approach 2:
The frame structure converts harmful inertial forces and vibrations into beneficial compressive and tensile forces within the diagonal and lateral beams. By properly positioning these members, the structure transforms potentially damaging dynamic loads into stable internal force distributions that strengthen the overall frame.
Data Source
AI summary
A combine head frame includes a laterally-extending upper beam adjacent to the top of the combine head and a laterally-extending lower beam adjacent to the bottom of the combine head. A left lateral beam has first and second ends, wherein the first end is coupled to a left central portion of the upper beam and the second end is coupled to a left end portion of the lower beam. A right lateral beam has third and fourth ends, wherein the third end is coupled to a right central portion of the upper beam and the fourth end is coupled to a right end portion of the lower beam.