Tire Sensor Mount Joint Structure for Low-Temperature Peeling Resistance
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Solution Overview
Problem
Tire pressure monitoring system (TPMS) sensors, being electronic components made of metal, face peeling issues when directly attached to rubber tires, especially under high-speed impacts in low-temperature environments.
Innovation Solution
A tire design where the electronic component mounting member has a joint portion with a lower complex elastic modulus than the tire inner member, ensuring the electronic component storage portion is securely attached with a joint surface, satisfying the condition E*r/E*i < 1, which enhances peeling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic component mounting member is directly attached to the rubber tire, then the electronic component can be mounted on the tire surface, but the electronic component may peel off when a large impact is applied during high-speed running in a low-temperature environment
Solution Approach 1:
The patent applies parameter changes by controlling the complex elastic modulus ratio between the joint portion and tire inner member at low temperature (0°C). By ensuring that the complex elastic modulus of the joint portion is 0.01 to 0.95 times that of the tire inner member, the patent optimizes the mechanical properties to balance peeling resistance and joint strength under thermal and impact conditions
Solution Approach 2:
The patent employs composite materials by creating a joint portion with specific viscoelastic properties that differ from both the tire inner member and the electronic component. This composite structure, characterized by its controlled complex elastic modulus, acts as an intermediate layer that absorbs impact energy and prevents peeling while maintaining secure attachment
2Reliability
If the electronic component mounting member is made rigid to prevent peeling, then peeling resistance improves, but the impact from high-speed running in low-temperature environment cannot be absorbed
Solution Approach 1:
The patent changes the physical parameters of the joint portion by controlling its complex elastic modulus to be 0.01 to 0.95 times that of the tire inner member at 0°C. This parameter optimization enables the joint portion to exhibit appropriate flexibility to absorb impact while maintaining sufficient rigidity to prevent peeling
Solution Approach 2:
The patent implements beforehand cushioning by designing the joint portion with specific viscoelastic properties that anticipate and absorb impact forces before they can cause peeling. The controlled complex elastic modulus allows the joint portion to act as a cushioning element during high-speed running in low-temperature environments
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 design significantly reduces the likelihood of electronic components peeling off from the tire surface during high-speed running in low-temperature environments by mitigating impact through flexible deformation.
Implementation Method 1
the complex elastic modulus E*r (MPa) of the joint portion at 0° C. and the complex elastic modulus E*i (MPa) of the tire inner member at 0° C. satisfy the following (formula 1)
Data Source
AI summary
Provided is a tire having high peeling resistance such that an electronic component mounting member unlikely peels off from the surface of the tire even when a large impact is applied on the tire during a high-speed running in a low-temperature environment. In the tire, the electronic component mounting member for incorporating an electronic component is mounted on the surface of a tire inner member, the electronic component mounting member comprises an electronic component storage portion for storing the electronic component and a joint portion having a joint surface for mounting the electronic component mounting member on the surface of the tire inner member, and the complex elastic modulus E*r (MPa) of the joint portion at 0° C. and the complex elastic modulus E*i (MPa) of the tire inner member at 0° C. satisfy the following (formula 1).E*r/E*i<1(formula 1)