Combine Harvester Feederhouse Reinforcement Bars
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Solution Overview
Problem
The existing feederhouse designs for combine harvesters face challenges in tolerating increased vertical torsion and vertical loads, which can lead to structural fatigue and failure, particularly due to the increasing weight and size of the header.
Innovation Solution
The proposed feederhouse design incorporates a frame structure with rotatably adjustable tilt and pitch frames, reinforced with bars that connect to lift and pitch actuator pins, providing improved distribution of internal stresses and strains. This design includes reinforcement bars that work in traction or compression depending on the header's tilt, and cross braces for additional stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the header size and weight are increased to increase throughput capacity, then the productivity of the combine harvester is improved, but the vertical load and vertical torsion load on the feederhouse structure increase, leading to structural fatigue and potential failure
Solution Approach 1:
The feederhouse structure is divided into modular components including a header support assembly with separate tilt and pitch adjustment mechanisms. This segmentation allows the structure to be optimized for strength in specific load-bearing areas while maintaining overall productivity capabilities.
Solution Approach 2:
Reinforcement bars are strategically positioned at critical stress points within the feederhouse structure, particularly where vertical torsion and vertical loads from the header are most concentrated. This localized reinforcement provides enhanced structural integrity without requiring uniform strengthening of the entire structure.
2Quantity of substance
If the header weight is increased to handle larger crop volumes, then the quantity of material processed is improved, but the cycles of height control generate more load cycles at the feederhouse structure, increasing fatigue damage
Solution Approach 1:
The header support assembly incorporates dynamic tilt and pitch adjustment capabilities that allow the structure to adapt to varying load conditions during operation. This dynamic adjustment reduces stress concentration and distributes load cycles more evenly across the feederhouse structure.
Solution Approach 2:
The feederhouse structure utilizes composite construction with reinforcement bars integrated into the frame, creating a composite material system that provides enhanced fatigue resistance and structural reliability under repeated load cycles from header weight and height control operations.
3Ease of repair
If the feederhouse is designed with removable panels for access to internal mechanisms, then the ease of repair is improved, but the torsional and vertical load tolerance is reduced
Solution Approach 1:
The feederhouse structure is segmented into removable panel sections that provide access to internal mechanisms while the main load-bearing frame remains intact. This allows maintenance access without compromising the structural integrity and load tolerance of the critical support elements.
Solution Approach 2:
Removable panels are positioned in non-critical areas of the feederhouse structure where they do not interfere with primary load paths. The reinforcement bars and main frame members remain in place to maintain torsional and vertical load tolerance, while panels provide localized access for repairs.
Data Source
AI summary
A feederhouse is provided for delivering crop material to the threshing system of a combine harvester. The feederhouse has a frame structure with a tilt frame, pitch frame, and front and rear housing sections. First and second lift actuators and lift actuator pins and first and second pitch actuators and pitch actuator pins are provided. First and second reinforcement bars are provided at opposite lateral sides, wherein each reinforcement bar connects to the lift actuator pin and pitch actuator pin at a first end and to the rear housing section at the opposite second end.