All-Wheel Header Trailer Steering for Tight Rural Turns
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Solution Overview
Problem
Current combine header trailers are rigid and unable to make tight turns without causing damage to the combine or towing vehicle, posing safety hazards and requiring equipment replacement due to damage, especially when navigating narrow rural roads.
Innovation Solution
A trailer system with a front wheel assembly that rotates 360 degrees, a steering assembly that transfers rotation to rear wheel assemblies, and rear wheel assemblies with a slew bearing, allowing for all-wheel steering and smooth turning, even under heavy loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the trailer uses a rigid structure to support heavy agricultural implements, then the trailer can carry heavy loads, but the trailer cannot make tight turns without causing damage to the combine or towing vehicle
Solution Approach 1:
The trailer employs dynamic wheel assemblies where each wheel can rotate independently on multiple axes. The front wheels can rotate 360 degrees on a vertical axis, and the rear wheels can rotate on both vertical and horizontal axes through slew bearings. This dynamic configuration allows the trailer to adapt its wheel orientation during turns, enabling tight cornering while maintaining structural integrity and load-bearing capacity.
Solution Approach 2:
The trailer is divided into separate wheel assemblies (front and rear) with independent rotation capabilities. Each wheel assembly can rotate independently, allowing the front wheels to steer sharply while the rear wheels follow through slew bearing rotation. This segmentation enables the trailer to navigate tight turns without the rigid frame causing damage to the combine or towing vehicle.
2Ease of operation
If the trailer is designed to make tight turns, then the trailer can navigate narrow rural roads, but the trailer structure becomes more complex
Solution Approach 1:
The slew bearing mechanism serves multiple functions: it enables the rear wheels to rotate during turns, supports the weight of the agricultural implement, and allows the wheels to maintain proper orientation on the road surface. By combining these functions into a single component, the design achieves tight turning capability without proportionally increasing overall system complexity.
Solution Approach 2:
The wheel assemblies are designed with specific rotation parameters - front wheels can rotate 360 degrees on a vertical axis, and rear wheels can rotate on both vertical and horizontal axes. These parameter specifications allow the trailer to navigate tight turns while maintaining a relatively simple overall structure, as the rotation capabilities are built into the wheel assemblies themselves rather than requiring complex external mechanisms.
3Reliability
If the trailer uses independent wheel rotation to make tight turns, then the trailer can navigate narrow roads safely, but the manufacturing cost increases
Solution Approach 1:
The wheel assemblies are designed to be self-contained with integrated rotation mechanisms. The slew bearings are built into the rear wheel assemblies, allowing them to rotate independently without requiring complex external steering linkages or additional actuation systems. This self-service design improves safety during turning while keeping manufacturing costs relatively controlled, as the complexity is contained within the wheel assemblies themselves rather than requiring extensive additional components.
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
Enables the trailer to make sharp turns without damaging the combine or towing vehicle, ensuring safe operation and compliance with road travel restrictions while supporting heavy agricultural implements.
Implementation Method 1
the rear wheel assembly includes a slew bearing to allow for smooth turning of the wheels of the rear wheel assembly
Implementation Method 2
the front wheel assembly and the rear wheel assembly are operably connected via a steering assembly which translates the turning of the wheels of the front wheel assembly to the turning of the wheels of the rear wheel assembly
Data Source
AI summary
In one or more arrangements, a trailer system is presented. In one or more arrangements, the trailer system includes a front wheel assembly having wheels and a rear wheel assembly having wheels. In one or more arrangements, the wheels of the front wheel assembly turn when the trailer is performing a turn and the wheels of the rear wheel assembly turn when the trailer is performing a turn. In one or more arrangements, the trailer system is configured to support an agricultural implement.