Tire Bead RFID Placement Around Steel Cord Splices
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Solution Overview
Problem
Tires with bead reinforcing layers face durability and communication issues when electronic components like RFID chips are positioned outside the bead reinforcing layer, as deformation causes component deterioration and potential communication failures due to metal interference.
Innovation Solution
A pneumatic tire design with a bead reinforcing layer comprising rubber-coated steel cords and an overlap-jointed spliced portion, where the electronic component is placed within the radial range of the steel cord ply but away from the spliced portion to enhance durability and communication functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic component is disposed at a position on the outside in the tire radial direction of the bead reinforcing layer, then the communication function with external reader is improved, but the durability of the electronic component deteriorates due to large deformation and deflection
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 communication functionality through strategic positioning away from the spliced portion
2Duration of action of stationary object
If the electronic component is disposed within the bead reinforcing layer region, then the durability is improved, but communication failure may occur due to interference from metal members
Solution Approach 1:
The patent applies local quality by creating a specific positioning strategy within the bead reinforcing layer. The electronic component is positioned within the radial region of the steel cord ply but at a location away from the spliced portion in the tire circumferential direction. This localized positioning ensures that the component benefits from the structural stability of the bead reinforcing layer while avoiding the metal concentration area at the spliced portion, thus preventing communication interference
Solution Approach 2:
The bead reinforcing layer structure acts as an intermediary between the electronic component and the spliced portion. By positioning the electronic component within the steel cord ply region but away from the spliced portion, the bead reinforcing layer structure mediates the interaction, providing structural support while the spatial separation prevents direct metal-to-metal interference that would cause communication failure
3Stability of the object's composition
If a bead reinforcing layer is provided to improve steering stability, then the steering stability is improved, but the deformation at certain positions increases causing electronic component deterioration
Solution Approach 1:
The patent applies local quality by creating a specific positioning strategy within the bead reinforcing layer. The electronic component is positioned within the radial region of the steel cord ply but at a location away from the spliced portion in the tire circumferential direction. This localized positioning ensures that the component benefits from the structural stability of the bead reinforcing layer while avoiding the metal concentration area at the spliced portion, thus preventing communication interference
Data Source
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AI summary
The pneumatic tire comprises a tread portion 2, a pair of sidewall portions 3 and a pair of bead portions 4. At least one of the bead portions 4 is provided with at least one electronic component 20, a bead apex rubber 8 extending radially outwardly from a bead core 5, and a bead reinforcing layer 15 extending in the tire radial direction along the bead apex rubber 8. The bead reinforcing layer 15 comprises a steel cord ply 16 having a spliced portion 17 where both circumferential end portions thereof are overlap-jointed. The electronic component 20 is arranged away from the spliced portion 17 in the tire circumferential direction, and located within the arranged range in the tire radial direction of the steel cord ply 16.