Tire Bead Structure for Protecting Embedded Electronic Components
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Solution Overview
Problem
Pneumatic tires with embedded electronic components, such as RFID, face destruction from impact loads during travel and durability issues due to the embedded hard components, and there is a risk of the components falling off when adhered to the tire surface.
Innovation Solution
A pneumatic tire design featuring a bead reinforcing layer and a clinch member with lower rigidity than the bead reinforcing layer, where the electronic component is embedded between these two layers, ensuring the clinch member has a lower complex elastic modulus and heat generation property to absorb impact without damaging the component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic component is embedded in the inside of the unvulcanized tire and then integrated with the tire by vulcanization adhesion, then the electronic component is prevented from falling off, but the electronic component is easily destroyed by an impact load during traveling on the road surface and the durability of the tire is lowered
Solution Approach 1:
The bead reinforcing layer is designed with locally optimized properties: it has high rigidity (E*≥70 MPa) to provide structural support and prevent electronic component destruction, while the clinch member has lower rigidity (E*<70 MPa) to reduce stress concentration. This local differentiation of material properties resolves the contradiction between attachment reliability and impact resistance.
Solution Approach 2:
The invention uses composite material structures: the bead reinforcing layer combines rubber composition with high rigidity requirements (E*≥70 MPa, tan δ≤0.15) to create a protective environment for the electronic component, while the clinch member uses a different rubber composition with lower rigidity. This composite approach allows simultaneous achievement of secure attachment and impact protection.
2Strength
If a hard electronic component is embedded in the tire, then the electronic component can maintain its structural integrity, but the durability of the tire is lowered due to the embedded hard electronic component
Solution Approach 1:
The bead reinforcing layer acts as a pre-designed cushioning structure with specific rigidity (E*≥70 MPa) that absorbs and distributes impact loads before they reach the electronic component. This beforehand cushioning prevents both component destruction and tire durability degradation by creating a protective buffer zone.
Solution Approach 2:
The invention changes the rigidity parameter of the surrounding materials: the bead reinforcing layer has high rigidity (E*≥70 MPa) to protect the component, while the clinch member has lower rigidity (E*<70 MPa) to maintain tire flexibility and durability. This parameter differentiation resolves the contradiction between component integrity and tire durability.
3Stability of the object's composition
If the clinch member has the same rigidity as the bead reinforcing layer, then the structural consistency is maintained, but the electronic component is more susceptible to impact loads
Solution Approach 1:
The invention applies local quality differentiation: the bead reinforcing layer has high rigidity (E*≥70 MPa) for structural consistency and protection, while the clinch member has lower rigidity (E*<70 MPa) specifically at the location where it contacts the electronic component. This localized property variation reduces impact load susceptibility while maintaining overall 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 tire design effectively suppresses destruction from impact loads and maintains durability, preventing damage to the electronic component while ensuring reliable information communication during travel.
Implementation Method 1
the clinch member has a lower rigidity than the bead reinforcing layer, and the electronic component is embedded between the bead reinforcing layer and the clinch member
Data Source
AI summary
Provided is a tire manufacturing feature in which even when an electronic component is embedded in a tire, damage due to impact load during traveling on the road surface is inhibited and the durability of the tire is prevented from deteriorating. A pneumatic tire provided with: a bead reinforcing layer provided in the tire-axial-direction outer side of the carcass of a bead part the bead reinforcing layer reinforcing the bead part from the outer side of the carcass; a clinch member provided on the tire-axial-direction outer side of the bead reinforcing layer; and an electronic device. The clinch member has a rigidity lower than that of the bead reinforcing layer, and the electronic component is embedded between the bead reinforcing layer and the clinch member.