Tire Bead Anchoring via Inverted Clamping for Stress Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle tire manufacturing methods result in suboptimal force and stress distribution in the tire bead, leading to reduced durability.
Innovation Solution
A method involving lateral arrangement of inner and outer bead cores with the insert end worked down to create a secure sandwich-like structure, eliminating the need for a ply turn-up and ensuring even force distribution, using a thickening at the insert end for enhanced anchoring and incorporating reinforcing materials for improved strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the insert end is wrapped around the bead core from the inside of the tire (conventional ply turn-up), then the insert is firmly anchored in the tire bead, but the force and stress distribution in the tire bead becomes unfavorable
Solution Approach 1:
Instead of wrapping the insert end around the bead core from the inside (conventional method), the invention inverts the approach by positioning the insert end below the bead core and clamping it between the inner and outer bead cores from the outside. This inversion eliminates the ply turn-up step and achieves favorable stress distribution while maintaining firm anchoring.
Solution Approach 2:
The invention divides the bead core into two separate components: an inner bead core and an outer bead core. These two segmented bead cores work together to clamp the insert end between them, providing firm anchoring while distributing forces more favorably across the bead structure compared to the single bead core conventional approach.
2Strength
If the insert end is wrapped around the bead core, then the insert is anchored in the tire bead, but the bead width is increased which reduces space for additional bead components
Solution Approach 1:
The invention inverts the conventional anchoring approach by positioning the insert end below the bead core and clamping it between inner and outer bead cores, rather than wrapping it around. This inversion significantly reduces the bead width while maintaining firm anchoring of the insert.
3Strength
If a ply turn-up is applied during tire manufacture, then the insert end is anchored in the bead, but the mechanical load on the tire bead increases reducing durability
Solution Approach 1:
The invention eliminates the ply turn-up step by inverting the anchoring approach: the insert end is positioned below the bead core and clamped between inner and outer bead cores. This inversion reduces permanent mechanical load on the tire bead, increasing durability while maintaining secure insert anchoring.
Solution Approach 2:
The invention extracts and eliminates the ply turn-up step from the conventional tire manufacturing process. By removing this step and replacing it with the clamping method between inner and outer bead cores, the permanent mechanical load on the tire bead is reduced, improving durability.
Data Source
Figure 1~3
Figure 4~6
AI summary
The method involves arranging an inner bead core (5) with an inner apex (15) on both sides of a carcass drum (14). An end region (3) of an insert (1) is clamped between the inner bead core and an outer bead core (6). A manufactured tire carcass is held with a holding unit, where outer diameter of the carcass drum is reduced. The manufactured tire carcass of the carcass drum is decreased. A tire blank is integrated with a production method by using a reinforcing agent that consists of a fiber-like composite material that comprises steel cord, textile and elastomer.