Tubeless Tire Cladding Layer and Separator Design
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Solution Overview
Problem
Conventional tubeless tires face issues with air retention due to leakage at the rim and tire interface, poor rigidity, and high manufacturing and maintenance costs, particularly with the airtight-plate technique, which results in elastic fatigue and contamination of the rim.
Innovation Solution
A tubeless tire design featuring a cladding layer covering from the outer to the inner surface of the carcass, with an overlapped portion forming a gas chamber and a separator to enhance air retention and durability, compatible with standard air valve modules and rims, reducing elastic fatigue and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an airtight plate is installed inside the tubeless tire to prevent air leakage from the gap between rim and tire, then air retention is improved, but the airtight plate may move arbitrarily in the carcass causing elastic fatigue and potential leakage
Solution Approach 1:
The patent replaces the rigid airtight plate with a flexible membrane that can adapt to the tire's deformation while maintaining the seal. The membrane is stretched across the gas chamber opening and secured at the bead cores, allowing it to flex with the tire without causing elastic fatigue or detachment, thus resolving the contradiction between maintaining air retention and ensuring structural stability.
2Reliability
If sealant is filled into the gas chamber to protect against punctures, then puncture protection is improved, but the sealant may flow arbitrarily and leak through the air valve connecting position to contaminate the rim
Solution Approach 1:
The patent extracts the sealant from the gas chamber and places it in a separate isolation chamber. This separation prevents the sealant from flowing into the air valve connection area and contaminating the rim, while still maintaining puncture protection functionality. The isolation chamber acts as a containment zone that isolates the harmful factor (sealant) from critical components.
3Strength
If a cladding layer covers from the outer surface to the inner surface of the carcass, then rigidity and support are improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the cladding layer with the bead core structure, integrating the reinforcing function into an existing component rather than adding a separate complex assembly. The cladding layer is applied to cover the bead core and extend along the carcass, combining structural support and sealing functions in a unified design that simplifies manufacturing while maintaining enhanced rigidity.
Data Source
AI summary
An inflatable tubeless tire includes a carcass, a bead at the lower edge of both sides of the carcass; a cladding layer, continuously covering the bead from the exterior to the interior of the carcass, and both ends of the cladding layer having an overlapped portion between each carcass and a tread and continuously extending to form an external covered portion for covering an area from the outer surface to the bead, and the portion of both sides of the cladding layer covering the interior of the carcass being an internal covered portion, and the uncovered position in the carcass being an elastic portion, and each inner surface in the carcass and the cladding layer jointly forming a gas chamber; at least a separator, partially disposed on a wall surface of the gas chamber for isolating each elastic portion and the inner surface without sticking to one another of the carcass; an air valve module, passing between each opening and the through hole, and having a film fixed to the elastic portion; and an extending part, passing through each film, the cladding layer and the separator; a screw, with an end screwed into the extending part; and the screw having an air valve part therein.