Vehicle Track Anti-Rotation Release for Suspension Overload
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Solution Overview
Problem
Traditional track systems for vehicles experience excessive stress and suspension failures when traversing challenging terrain, leading to potential vehicle and track system damage due to extraordinary forces and sudden rotation, necessitating extensive repairs.
Innovation Solution
Incorporating an anti-rotation mechanism with a sacrificial component that can fail under predetermined loading conditions, providing an overload release capability and allowing for field replacement or reset, thereby reducing damage to the vehicle and track system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If track systems are used to improve traction in challenging terrain, then vehicle mobility and traction are enhanced, but suspension stress and risk of suspension failure increase
Solution Approach 1:
The patent introduces a sacrificial component (shear pin or shear bolt) within the anti-rotation mechanism that is designed to fail under predetermined overload conditions. This sacrificial component is cheaper and easier to replace than the suspension system, so it is intended to fail first to protect the suspension from damage. The shear pin/bolt is positioned in the load path such that it shears at a predetermined shear strength threshold, providing a cost-effective failure mode that protects more expensive components.
Solution Approach 2:
The anti-rotation mechanism with the sacrificial component provides beforehand cushioning by being pre-configured to fail in a controlled manner under excessive load. The shear pin or shear bolt is designed with a predetermined shear strength that is lower than the suspension system's capacity. When overload occurs, the sacrificial component fails first, absorbing the excess energy and preventing transmission of damaging forces to the suspension. This prior cushioning arrangement protects the suspension from catastrophic failure.
2Reliability
If anti-rotation mechanism is added to prevent track system rotation, then suspension damage is reduced, but device complexity increases
Solution Approach 1:
The patent merges the anti-rotation function with the existing suspension architecture by integrating the shear pin or shear bolt into the load path of the suspension system. Rather than adding a completely separate anti-rotation mechanism, the sacrificial component is incorporated into the existing structural framework, combining the anti-rotation function with the suspension's load-bearing path. This integration minimizes additional complexity while achieving the protective function.
Solution Approach 2:
The use of a simple, inexpensive sacrificial component (shear pin or shear bolt) provides anti-rotation protection through a straightforward mechanical principle rather than a complex mechanism. The shear pin/bolt design is simple in concept and execution, requiring minimal additional parts while providing effective overload protection. The simplicity of this disposable component contrasts with the complexity that would arise from more sophisticated anti-rotation mechanisms.
3Strength
If sacrificial component is used to absorb excess force, then damage to vehicle and track system is reduced, but component replacement needs increase
Solution Approach 1:
The sacrificial component (shear pin or shear bolt) is designed to be disposable and easily replaceable. When it fails under overload conditions, it can be quickly removed and replaced with a new component, restoring the anti-rotation function. This approach accepts that the sacrificial component will need periodic replacement, but the cost and complexity of replacement is minimal compared to repairing the suspension system or track components it protects.
Solution Approach 2:
The sacrificial component is extracted as a separate, replaceable element from the main anti-rotation mechanism and suspension system. By positioning the shear pin or shear bolt as a distinct component in the load path, it can be independently replaced without affecting the rest of the system. This extraction allows for quick field replacements, minimizing downtime and reducing the need for extensive repair operations.
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
The anti-rotation mechanism effectively absorbs excess force, preventing suspension and track system damage by allowing the sacrificial component to fail and release, enabling operators to safely resume vehicle operation with minimal assistance.
Implementation Method 1
Some of this loading will be readily absorbed by the coil spring of the mechanism
Data Source
AI summary
A vehicle with four track systems, each track system comprising a track frame supporting a drive sprocket and a plurality of idler wheels, a looped track extends about and is engaged with the drive sprocket and idler wheels. Each drive sprocket is secured to driven hub of the vehicle. An anti-rotation device extends between each track frame and the suspension of the vehicle. The anti-rotation device has an elongatable and contractable portion and a spring portion to resist such elongation and/or contraction. A releasable portion attaches to engaged components of the elongatable and contractable portion to fix them in place with respect to one another. Upon reaching a load limit due to excessive rotation of the track system or other event, the releasable portion releases the engaged components thereby preventing or minimizing damage to the vehicle and/or track system. The releasable portion may be field reset, manually or may self-reset.