Drive Wheel Hub Protrusions for Tire Wear Indication and Anti-Slip
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Solution Overview
Problem
Existing cargo handling systems for aircraft face challenges in maintaining effective engagement and stability between the drive wheel and tire, leading to potential relative rotational movement and inadequate wear indication for timely replacement, which can impact the efficiency and reliability of cargo transportation.
Innovation Solution
The drive wheel design incorporates protrusions and slots on the hub's outer perimeter, which securely mount a solid tire, reducing relative rotational motion and serving as a visual wear indicator, allowing for timely replacement based on protrusion exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the tire is mounted on the hub without protrusions, then the mounting process is simpler, but relative rotational movement occurs between the tire and hub during operation
Solution Approach 1:
The hub's outer perimeter is segmented into multiple protrusions that extend radially outward, creating discrete engagement points with the tire. This segmentation allows the tire to be securely mounted while maintaining a relatively simple overall hub structure, resolving the contradiction between engagement stability and structural complexity.
Solution Approach 2:
The protrusions are strategically positioned at specific locations on the hub's outer perimeter to provide localized engagement points. This local quality approach ensures stable tire-hub engagement only where needed, rather than requiring complex structures throughout the entire hub, thus balancing stability with simplicity.
2Reliability
If the tire wears down completely before detection, then the drive wheel continues operating, but reliability is compromised due to inadequate wear indication
Solution Approach 1:
The protrusions on the hub serve dual functions: they provide mechanical engagement stability and simultaneously act as wear indicators. As the tire wears, the protrusions become exposed, providing self-service wear detection without requiring additional complex indicator systems, thus improving reliability while maintaining structural simplicity.
Solution Approach 2:
The protrusions are designed to perform multiple functions: mechanical engagement to prevent relative rotation and visual wear indication. This multi-functionality eliminates the need for separate wear indicator components, resolving the contradiction between reliability improvement and device complexity.
3Reliability
If protrusions are added to the hub for wear indication, then timely tire replacement is enabled, but the hub structure becomes more complex
Solution Approach 1:
The wear indication function is merged with the mechanical engagement structure by making the protrusions serve both purposes. This combining of functions allows wear indication capability to be achieved without adding separate complex indicator systems, thus improving reliability while minimizing increases in structural complexity.
Data Source
AI summary
A drive wheel for a power drive unit of a cargo handling system is disclosed. One aspect of the drive wheel is that it includes one or more wear indicators for a tire of the drive wheel. Another aspect of the drive wheel is that it includes one or more features (e.g., at least one protrusion, alone or in combination with one or more slots) that resists relative rotational movement between the tire of the drive wheel and the hub of the drive wheel.