Tire Bead Reinforcement Structure for RFID Splice Interference
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Solution Overview
Problem
Tires with bead reinforcing layers face durability issues and communication failures when electronic components like RFID chips are positioned outside the bead reinforcing layer, due to deformation and interference from metal members.
Innovation Solution
A pneumatic tire design with a bead reinforcing layer comprising rubber-coated steel cords, where the electronic component is placed within the radial direction of the steel cord ply and away from the spliced portion, enhancing durability and communication functions while improving steering stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electronic component is disposed outside the bead reinforcing layer in the tire radial direction, then the steering stability is improved, but the durability of the electronic component deteriorates due to large deformation and deflection at that position
Solution Approach 1:
The electronic component is nested within the bead reinforcing layer structure, specifically positioned within the region in the tire radial direction where the steel cord ply is located. This nesting approach allows the electronic component to benefit from the structural support and reduced deformation characteristics of the bead reinforcing layer, thereby improving durability while maintaining steering stability
2Strength
If the electronic component is disposed near metal members, then the structural support is enhanced, but communication failure with the reader occurs due to interference from metal members
Solution Approach 1:
The patent applies local quality by specifying that the electronic component should be disposed at a position away from the spliced portion of the steel cord ply. The spliced portion represents a localized area with different metal concentration and distribution characteristics. By avoiding this specific region while remaining within the bead reinforcing layer, the electronic component maintains structural support without suffering from communication interference
Data Source
AI summary
The pneumatic tire comprises a tread portion, a pair of sidewall portions and a pair of bead portions. At least one of the bead portions is provided with at least one electronic component, a bead apex rubber extending radially outwardly from a bead core, and a bead reinforcing layer extending in the tire radial direction along the bead apex rubber. The bead reinforcement layer comprises a steel cord ply having a spliced portion where both circumferential end portions thereof are overlap-jointed. The electronic component is arranged away from the spliced portion in the tire circumferential direction, and located within the arranged range in the tire radial direction of the steel cord ply.