Articulated Slave Trailer Coupling for Off-Road Stability
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Solution Overview
Problem
Existing modular vehicles face instability and inefficiency when multiple slave vehicles are articulated to a master vehicle, particularly during high-speed off-road driving, due to uncontrolled movement and stress transmission.
Innovation Solution
A modular slave vehicle design featuring a mechanical stress absorbing coupling mechanism at the front end and detachable coupling devices at the rear end, allowing partial unconstrained rotational DOF and constrained translational DOF, with a control system to adjust driving parameters based on input signals from the master vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple slave vehicles are articulated to a master vehicle, then load capacity and versatility are improved, but stability and control deteriorate due to uncontrolled movement and stress transmission
Solution Approach 1:
The coupling system is segmented into a master coupling system with stress absorption capabilities and multiple slave coupling devices. Each slave vehicle has independent coupling mechanisms that can be selectively engaged, allowing the articulated assembly to maintain stability while accommodating variable load configurations. The segmentation enables each unit to contribute to load capacity without compromising overall assembly stability.
Solution Approach 2:
The master coupling system acts as an intermediary between the master vehicle and slave vehicles, absorbing and dampening stresses transmitted through the articulated assembly. This intermediary mechanism prevents uncontrolled movement from propagating through the entire assembly, maintaining stability while allowing the versatile configuration of multiple slave vehicles.
2Stability of the object's composition
If a rigid coupling system is used to constrain all DOF, then stability is improved, but stress transmission and maneuverability worsen
Solution Approach 1:
The coupling system transitions from a static rigid connection to a dynamic articulated assembly with controlled degrees of freedom. The master coupling system allows selective constraint of translational DOF while permitting controlled rotational movement, enabling the assembly to adapt to terrain variations and reduce stress transmission during off-road maneuvering.
Solution Approach 2:
The master coupling system incorporates stress absorption and damping capabilities that are activated before excessive forces can damage the articulated assembly. This beforehand cushioning mechanism protects against stress transmission by absorbing shocks and forces generated during high-speed off-road driving before they propagate through the coupling devices.
3Stability of the object's composition
If a complex coupling mechanism is used to constrain all DOF, then stability is improved, but device complexity increases
Solution Approach 1:
The complex coupling mechanism is segmented into standardized master and slave coupling devices that can be independently manufactured and assembled. This segmentation simplifies the overall system by breaking down the complex DOF constraints into manageable modular components, reducing device complexity while maintaining stability through coordinated operation of the segmented elements.
Solution Approach 2:
The slave coupling devices are designed with universal functionality to interface with both the master coupling system and other slave vehicles. This multi-functionality reduces device complexity by using standardized components rather than specialized mechanisms for each coupling scenario, simplifying the overall coupling mechanism while maintaining stable articulated configurations.
4Productivity
If slave vehicles are articulated to each other in tandem, then load distribution is improved, but connection reliability worsens due to cumulative stress
Solution Approach 1:
The tandem articulated assembly is segmented into independent coupling interfaces between each slave vehicle. Each master-slave coupling connection is independently designed to absorb and distribute stresses, preventing cumulative stress from compromising connection reliability. The segmentation allows load distribution across multiple connections while maintaining reliable individual joint performance.
Solution Approach 2:
Each master coupling system acts as an intermediary that absorbs and dampens stresses before they propagate to subsequent slave vehicle connections. This intermediary function protects the reliability of downstream connections by preventing cumulative stress buildup, enabling efficient load distribution across the tandem assembly while maintaining connection reliability.
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
Enhances stability and maneuverability of articulated vehicle assemblies by damping stress transmission and maintaining alignment, enabling high-speed off-road driving and efficient load distribution among vehicles.
Implementation Method 1
a master coupling system in the form of a mechanical stress absorbing coupling mechanism
Implementation Method 2
master coupling system being detachably articulatable to said coupling portion of the master vehicle so as to constrain, at least partially, all translational DOF of the vehicles relatively to each other
Data Source
AI summary
A modular slave vehicle articulatable at one end thereof to another slave vehicle and at another end thereof to an independently driven master vehicle, simultaneously. The slave vehicle comprising a body including a driving system; a structural frame supporting said body; a master coupling system in the form of a mechanical stress absorbing coupling mechanism; at least one first slave coupling device; at least one second slave coupling device; said first and second coupling devices, when mounted to two adjacent slave vehicles intended to be articulated to each other, are detachably connectable to each other to form a tandem coupling configured to constrain all DOF therebetween.