Bead-Reinforced Tire Structure for Embedded Transponder Durability
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Solution Overview
Problem
Existing pneumatic tires with embedded RFID transponders face challenges in maintaining steering stability and durability due to the risk of separation between rubber layers, which degrades communication performance and transponder durability.
Innovation Solution
A pneumatic tire design featuring a second filler rubber on the outer side of the carcass layer and a transponder positioned between the carcass layer and the second filler rubber, with specific hardness and positioning to enhance bead reinforcement, reduce transponder damage, and maintain communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transponder is embedded at the interface between the second filler rubber and rim cushion rubber layer, then the steering stability and durability of the tire are improved, but the risk of separation between rubber layers increases, degrading communication performance and transponder durability
Solution Approach 1:
A third filler rubber layer is introduced as an intermediary between the second filler rubber and the rim cushion rubber layer. This intermediate layer acts as a bonding bridge that prevents separation between the rubber layers while maintaining the structural reinforcement benefits, thereby resolving the contradiction between improved reliability and reduced separation risk.
Solution Approach 2:
The patent employs a composite structure with three distinct filler rubber layers, each with specific material properties. The combination of first filler rubber (softer), second filler rubber (harder), and third filler rubber (intermediate properties) creates a composite material system that simultaneously achieves reinforcement, separation prevention, and transponder protection.
2Reliability
If a second filler rubber is added to reinforce the bead portion, then the steering stability is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The filler rubber is segmented into three distinct layers (first, second, and third filler rubber) with different properties and positions. This segmentation allows each layer to perform its specific function - the first layer provides base reinforcement, the second layer provides enhanced bead reinforcement and transponder protection, and the third layer prevents separation - thereby achieving improved steering stability through a structured, modular approach that manages complexity.
Data Source
AI summary
A pneumatic tire that includes a tread portion extending in a tire circumferential direction and having an annular shape, a pair of sidewall portions disposed on both tread portion sides, and a pair of bead portions each disposed radially on an inner side of the sidewall portions. A first filler rubber is disposed on an outer circumference of a bead core of each bead portion, a carcass layer mounted between the pair of bead portions, a plurality of belt layers disposed on an outer circumferential side of the carcass layer and turned up from a tire inner to a tire outer side around the bead core. A second filler rubber is disposed on an outer side of the carcass layer in a tire width direction, and a transponder is disposed between the carcass layer and the second filler rubber in contact with the second filler rubber.