Trailer Steering Knuckle Arc Path Geometry
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Solution Overview
Problem
Existing trailer steering systems fail to align wheels tangentially with the trailer's trajectory during turns, leading to slippage and premature tire wear, and often require complex and cumbersome hydraulic circuits or dolly systems that increase the risk of tipping.
Innovation Solution
A steering assembly with pivotally connected steering knuckles and guiding mechanisms that allow each wheel to follow an arced path with a unique radius of curvature, enabling independent orientation of wheels on each side of the trailer to maintain tangential alignment with the trajectory, preventing slippage and allowing greater angle turns without frame contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wheels are mounted close to the frame to satisfy legal distance requirements, then regulatory compliance is achieved, but the wheels cannot turn at great angles without contacting the frame
Solution Approach 1:
The patent moves the wheel assembly away from the frame in the lateral dimension, creating arcuate paths that allow greater turning angles. The swing mechanism enables the steering knuckle to oscillate along an arcuate path, effectively utilizing dimensional space to resolve the conflict between legal distance requirements and turning angle needs.
Solution Approach 2:
The patent introduces a dynamic swing mechanism that allows the steering knuckle to oscillate along an arcuate path rather than maintaining a fixed position. This dynamic adjustment enables the wheels to achieve greater turning angles while maintaining compliance with legal distance requirements during straight-line travel.
2Adaptability or versatility
If a dolly system is used to enable wheel orientation, then steering capability is improved, but the center of mass increases and tipping risk increases
Solution Approach 1:
The patent extracts the essential steering function from the complex dolly system, implementing a simplified swing mechanism that provides wheel orientation capability without the additional weight and center of mass elevation associated with full dolly systems. This extraction maintains the beneficial steering capability while eliminating the harmful weight penalty.
3Ease of operation
If complex hydraulic circuits are used for steering, then precise wheel control is achieved, but system complexity and leak risk increase
Solution Approach 1:
The patent replaces complex hydraulic control systems with a mechanically simpler swing mechanism that achieves precise wheel control through geometric constraints and linkages. This substitution maintains operational precision while dramatically reducing system complexity and eliminating hydraulic leak risks.
4Device complexity
If wheels are kept parallel to the frame during turns, then structural simplicity is maintained, but wheel slippage and tire wear increase
Solution Approach 1:
The patent implements a dynamic swing mechanism that automatically adjusts wheel orientation during turns, allowing wheels to follow the trajectory of the vehicle. This dynamic adjustment prevents wheel slippage and tire scrubbing, extending tire lifespan while maintaining relatively simple steering mechanism geometry.
Data Source
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AI summary
There is provided a steering assembly for steering a vehicle. The steering assembly comprises a first steering knuckle having a first wheel rotatably mounted thereto, a first swing mechanism for enabling displacement of the first steering knuckle along a first arced path and a first guiding mechanism for pivoting the first steering knuckle when the first steering knuckle is displaced along the first arced path in order to maintain the first wheel oriented tangentially relative to the first arced path. The first arced path is concave relative to a central longitudinal axis of the vehicle and spaced from the first frame member, away from a central longitudinal axis of the vehicle, by a distance sufficient to prevent the first wheel from contacting the first frame member when the first steering knuckle is pivoted. There is further provided a method of operating the steering assembly.