Hub-Integrated Tire Inflation Using Wheel-End Motion Conversion
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Solution Overview
Problem
Conventional tire inflation systems are complex, prone to damage, and require frequent maintenance, with centralized air systems leading to increased complexity and potential leaks, and existing solutions do not effectively integrate with the wheel-end hub for efficient and accessible inflation.
Innovation Solution
A hub-integrated inflation system that converts relative motion between the wheel and hub into mechanical or electrical energy to actuate a pump, integrated into the wheel hub, reducing external exposure and complexity, with a selective engagement mechanism to control pumping modes and minimize wear, and includes a power pickup assembly and energy transmission mechanism for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a centralized air system is used for tire inflation, then inflation capability is provided, but system complexity increases and potential for leaks increases
Solution Approach 1:
The patent divides the centralized air system into multiple independent inflation units, each with its own air source and pump mechanism. This segmentation eliminates long air lines and centralized components that are prone to leaks, while reducing overall system complexity through modular design. Each wheel-end unit operates independently, preventing cascade failures across the system.
2Device complexity
If the inflation system is integrated into the wheel hub, then external exposure and complexity are reduced, but integration complexity increases
Solution Approach 1:
The inflation system components are nested within the wheel hub structure, with the pump mechanism, air storage, and control elements integrated into the hub's internal cavities and spaces. This nesting approach reduces external exposure and complexity while utilizing existing hub geometry to minimize integration challenges. The modular nested design allows for standardized manufacturing of hub assemblies with built-in inflation capabilities.
3Reliability
If a selective engagement mechanism is added to control pumping modes, then component wear is minimized, but device complexity increases
Solution Approach 1:
The selective engagement mechanism dynamically adjusts the connection between the pump drive and the pump mechanism based on operational requirements. During normal rotation, the engagement is disengaged to minimize wear; during inflation operations, the engagement is activated to drive the pump. This dynamic on-demand engagement reduces component wear while maintaining relatively simple mechanical structures through cam-based or clutch-based switching mechanisms.
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 hub-integrated inflation system reduces maintenance needs, minimizes component wear, and provides a more efficient and accessible tire inflation solution by integrating the inflation system within the wheel hub, reducing external complexity and exposure to damage, while allowing for automatic or manual control and minimizing the number of components required.
Implementation Method 1
A hub-integrated inflation system that converts relative motion between the wheel and hub into mechanical or electrical energy to actuate a pump
Data Source
AI summary
A hub-integrated inflation system which functions to convert relative motion at the wheel end (e.g., between the axle and the hub or wheel) into a pumping motion. The relative motion is then converted into mechanical or electrical energy, which can be used to actuate a pump of an inflator.