Tire Structure With Wing Core Preventing Air Tube Puncture
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Solution Overview
Problem
Conventional triple-layered tires are prone to punctures due to the air tube being drawn into the space between the core and the tire outer layer when rolling, leading to damage and loss of air, which is not effectively addressed by existing technologies.
Innovation Solution
The tire structure incorporates a core with a wing part positioned under the upper surface of the rim, maintaining the air tube's integrity by ensuring it is not drawn into the space between the core and the tire outer layer, and optimizing the compression ratio and hardness of the core to balance rolling resistance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid tire is used instead of an air tube tire, then puncture resistance is improved, but weight increases and rolling resistance increases
Solution Approach 1:
The tire is divided into multiple functional layers: an air tube layer for weight reduction and rolling resistance control, a core layer for puncture protection, and a tire outer layer for structural integrity. This segmentation allows each layer to specialize in one function, resolving the contradiction between puncture resistance and weight/rolling resistance.
Solution Approach 2:
The tire combines different materials and structures: the air tube uses elastic rubber material, the core uses puncture-resistant material, and the outer layer uses durable tire material. This composite structure integrates the advantages of different materials to achieve both puncture resistance and acceptable weight/rolling resistance characteristics.
2Reliability
If the air tube is placed inside the core and tire outer layer, then puncture protection is improved, but the air tube may be drawn into the space between core and tire outer layer causing tearing
Solution Approach 1:
The air tube is pre-inflated to a specific pressure range (0.2-0.6 MPa) before assembly, and the core and tire outer layer are designed with specific dimensional relationships. This preliminary action ensures that during operation, the air tube remains properly positioned and is not drawn into the space between layers, preventing tearing while maintaining puncture protection.
Solution Approach 2:
The invention optimizes specific parameters: the inflation pressure of the air tube (0.2-0.6 MPa), the ratio B/A (0.75 or less), and the ratio D/C (3.3 or less). These parameter changes ensure the air tube maintains its shape and position, preventing it from being drawn into the space between the core and tire outer layer while still providing puncture protection.
3Ease of manufacture
If the wing part of the core is positioned above the rim, then assembly is simplified, but the air tube is drawn into the space between core and tire outer layer during rolling causing puncture
Solution Approach 1:
The wing part of the core is positioned in a different spatial dimension - specifically, below the upper surface of the rim rather than above it. This dimensional change in positioning prevents the air tube from being drawn into the space between the core and tire outer layer during rolling, while still allowing for proper assembly through the modified geometric relationship.
4Reliability
If the tire is designed as a run-flat tire with specific dimensional ratios, then continued operation after puncture is enabled, but manufacturing precision requirements increase
Solution Approach 1:
The invention establishes specific parameter ranges for run-flat capability: the ratio B/A should be 0.75 or less, and the ratio D/C should be 3.3 or less. By defining these parameter ranges, the invention balances run-flat performance with manufacturability, providing clear design guidelines that achieve reliability without excessive manufacturing precision requirements.
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
This design prevents punctures and maintains tire functionality as a run-flat tire, offering improved rolling resistance and extended mileage while maintaining ride comfort and safety.
Implementation Method 1
Japanese Patent No. 3335110 which describes a tire that uses a sponge-like rubber material as a buffer to absorb shock from the road surface
Implementation Method 2
U.S. Patent Laid-open Publication No. 2017-0057286 describes a tire that includes a foam element inserted between an air tube and the tire to suppress a tire puncture
Data Source
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AI summary
Disclosed is a tire structure capable of being combined with a rim, and the tire structure includes an air tube, a core provided on the air tube, and a tire outer layer provided on the core, and the core includes a body part positioned above a transverse diameter of the air tube and a wing part positioned under the transverse diameter of the air tube, and a lower end of the wing part is placed under an upper surface of the rim.