Active Wheel Structure With Multi-Tube Tire Pressure Shaping
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Solution Overview
Problem
Uneven pressure distribution between the wheel and the ground in vehicles leads to uneven wear and tear of the outer tire, affecting friction force, self-aligning torque, yawing stability, and vertical stability.
Innovation Solution
An active contact pressure control wheel structure with inflatable inflation inner tubes and a gas control system that adjusts tire shape in real time by inflating or deflating these tubes through a network of passages and pipe assemblies, allowing independent pressure control of multiple inner tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional wheel structure is used, then the structure is simple, but uneven pressure distribution occurs between wheel and ground leading to uneven tire wear
Solution Approach 1:
The wheel structure is segmented into multiple independent inflation inner tubes (at least two tubes) that can be individually controlled. Each tube has its own pressure control system through separate gas input/output passages, allowing independent pressure adjustment to achieve uniform pressure distribution across the tire contact patch with the ground.
Solution Approach 2:
The wheel structure incorporates dynamic pressure control capability through inflatable inner tubes that can adjust their pressure in real-time. The gas input pipe assemblies and gas output pipe assemblies enable continuous pressure adjustment to adapt to varying driving conditions, maintaining optimal pressure distribution dynamically rather than statically.
2Reliability
If multiple inflation inner tubes with independent pressure control are added, then pressure distribution uniformity is improved, but the wheel structure becomes more complex
Solution Approach 1:
The axle barrel serves multiple functions: it acts as a structural support component, a housing for the passage system, and a pressure distribution mechanism. The annular passages and radial passages work together as an integrated pressure control network that serves both structural and pneumatic functions, reducing the need for separate dedicated components.
Solution Approach 2:
The passage system is nested within the axle barrel structure. The axial input passages and axial output passages are arranged concentrically around the central axis, with annular passages positioned between them. This nested arrangement allows multiple pressure control functions to be integrated within a compact single-component housing.
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 driving safety and stability by ensuring even tire pressure distribution, compensating for camber angle, and maintaining flexibility in suspension design without additional components like a transmission gear box.
Implementation Method 1
A gas flows into or flows out from each of the inflation inner tubes via each of the gas input pipe assemblies, each of the axial input passages, each of the second radial passages, each of the annular passages, each of the first radial passages and each of the axial output passages to allow the at least two inflation inner tubes to have different pressures, thereby adjusting a shape of the outer tire
Data Source
AI summary
An active contact pressure control wheel structure includes an axle, an axle barrel, a rim, an outer tire, at least two inflation inner tubes, at least two gas output pipe assemblies, and at least two gas input pipe assemblies. The axle includes at least two axial output passages and at least two first radial passages. The axle barrel sleeves on an outside of the axle and includes at least two axial input passages, at least two annular passages, and at least two second radial passages. A gas flows into or flows out from each inflation inner tube via each gas input pipe assembly, each axial input passage, each second radial passage, each annular passage, each first radial passage and each axial output passage to allow the at least two inflation inner tubes to have different pressures, thereby adjusting a shape of the outer tire.