Powered Rail Cargo Tug with Modular Drive and Guide Wheels
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Solution Overview
Problem
Existing cargo handling systems for aircraft are complex and inflexible, requiring extensive power and control cables and being unsuitable for loading long cargo runs with multiple support bases, which limits stress distribution and efficiency.
Innovation Solution
A cargo handling system featuring a platform that engages with T-shaped rails, propelled by power drive units with drive and guide wheels, allowing for efficient movement along the rails with reduced infrastructure needs and improved stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stationary motor driven power drive units with permanently installed hardware are used, then cargo can be transported within the cargo compartment, but the system complexity increases due to extensive power and control cables throughout the cargo compartment
Solution Approach 1:
The system divides the cargo handling function into separate modular components: movable tugs with power drive units that can be positioned at different locations along the rails, rather than having a single complex permanently installed system. Each tug is an independent unit that can service different cargo positions.
Solution Approach 2:
The power and control systems are extracted from the permanently installed infrastructure and integrated into the movable tug units themselves. This eliminates the need for extensive power and control cables running throughout the cargo compartment, as each tug carries its own power source and control systems.
2Reliability
If stationary motor driven power drive units are used, then cargo transport is enabled, but the system is not amendable to loading long cargo runs with multiple support bases
Solution Approach 1:
The system transitions from static permanently installed power drive units to dynamic movable tugs that can be repositioned along the rails. This allows the system to adapt to different cargo configurations, including long cargo runs with multiple support bases, by moving the tugs to appropriate positions for loading and unloading operations.
Solution Approach 2:
The movable tugs serve multiple functions: they can transport cargo, position support bases for long cargo runs, and accommodate different loading configurations. A single tug design can handle various cargo types and positions, making the system versatile for different operational requirements.
3Stress or pressure
If multiple support bases are used for long cargo runs, then stress distribution improves, but loading all support bases simultaneously increases system complexity
Solution Approach 1:
The movable tugs are equipped with autonomous power sources and control systems, enabling them to operate independently without requiring complex centralized coordination for simultaneous loading of multiple support bases. Each tug can autonomously position and service cargo at different locations along the rails.
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 system enables efficient loading and unloading of cargo with reduced complexity and infrastructure requirements, facilitating the handling of long cargo runs while minimizing stress on the system and cargo.
Implementation Method 1
the drive wheel is configured to rest upon and frictionally engage an upward facing surface of the first rail
Implementation Method 2
the guide wheel is configured to freewheel against a downward facing surface of the first rail
Data Source
AI summary
A cargo handling system is disclosed. In various embodiments, the cargo handling system includes a first rail defining an upward facing surface and a downward facing surface and a longitudinal direction and a lateral direction; a platform configured for rolling engagement with the first rail; and a first tug configured to propel the platform along the first rail in the longitudinal direction, the first tug comprising a power drive unit having a first drive wheel and a guide unit having a first guide wheel.