Pneumatic Tyre Belt Edge Foamed Rubber Stress Reduction
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Solution Overview
Problem
Conventional commercial vehicle tires suffer from limited tire belt durability due to irreversible damage caused by cracking at the belt edges, leading to premature replacement.
Innovation Solution
The tire belt edge regions are reinforced with a compressible material containing small enclosed air bubbles, such as foamed rubber or foamed plastic, to reduce material stresses and prevent cracking, enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber material is used in belt edges, then the tire belt provides structural support, but cracking occurs in the edge areas leading to limited lifespan
Solution Approach 1:
The patent applies different material properties to different regions of the belt layer. The edge regions are provided with compressible material containing small enclosed air bubbles, while the central region maintains conventional rubber material. This local differentiation allows the edge regions to accommodate dimensional changes without cracking, while the central region provides structural support, thereby resolving the contradiction between structural integrity and crack prevention.
Solution Approach 2:
The patent changes the physical parameters of the rubber material in the edge regions by incorporating small enclosed air bubbles, which fundamentally alters the material's compressibility and stress distribution characteristics. This parameter change enables the edge material to withstand hydrostatic tension and dimensional changes during tire operation, preventing the cracking that limits service life in conventional tires.
2Reliability
If the belt edge regions are made more flexible to prevent cracking, then durability improves, but structural support in edge areas may be reduced
Solution Approach 1:
The patent creates a composite material structure by combining conventional rubber material with compressible material containing air bubbles in the edge regions. This composite approach allows the edge regions to exhibit both flexibility (from the compressible material) and structural support (from the combined structure), resolving the contradiction between durability and strength.
Solution Approach 2:
The compressible material with air bubbles acts as a cushioning element that absorbs and distributes stresses before they can cause cracking. This beforehand cushioning effect protects the belt edges from the harmful hydrostatic tension that occurs during tire operation, maintaining both durability and structural integrity.
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 solution significantly increases tire belt durability by reducing hydrostatic tension and material stresses at the edge areas, resulting in a longer-lasting tire belt construction.
Implementation Method 1
the edge regions of at least one belt layer is provided with a compressible material with small enclosed air bubbles, whereby material stresses in the belt edges are reduced when the vehicle tire is loaded
Implementation Method 2
the compressible material consists of a foamed rubber material
Data Source
Figure 1~3
AI summary
Vehicle pneumatic tire with a belt assembly (1) consisting of several belt layers (3,4), wherein the edge areas (6, 8) of at least one belt layer (3) are provided with a compressible material with small enclosed air pores or air bubbles (13), thereby reducing material stresses in the belt edges (14) when the vehicle tire is loaded.