Tire

By optimizing the cord angle and breaking strength design of the carcass and belt layers, the problem of deformation and wear of small-diameter tires under high loads has been solved, achieving a balance between low rolling resistance and wear resistance, making them suitable for small vehicles to increase interior space and reduce transportation costs.

CN116745143BActive Publication Date: 2026-07-14THE YOKOHAMA RUBBER CO LTD
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Patent Information

Application Number
CN202280009763.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-03-30
Filing Date
2022-03-30
Publication Date
2026-07-14
Estimated Expiration
2042-03-30

AI Technical Summary

Technical Problem

Existing small-diameter tires struggle to balance low rolling resistance and wear resistance, and are prone to deformation and wear, especially under high loads.

Method used

The tire features a specific structure for its carcass and belt layers, including two carcass ply layers and multiple belt layers. The cord angle is within a specific range, ensuring that the tire's cord breaking strength is within a ratio of 17≤Tcs/OD≤120 within the size range of 200≤OD≤660mm and 100≤SW≤400mm, and that the breaking strength of the bead core and sidewall core is within a specific range.

Benefits of technology

It achieves a balance between wear resistance and low rolling resistance for small-diameter tires under high loads. By suppressing deformation and reducing rolling resistance caused by increased mass, it is suitable for small vehicles to increase interior space and reduce transportation costs.

✦ Generated by Eureka AI based on patent content.
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Abstract

The tire outer diameter OD [mm] of the tire 1 of the present application is in the range of 200 ≤ OD ≤ 660, and the total tire width SW [mm] is in the range of 100 ≤ SW ≤ 400. Furthermore, the carcass layer (13) is made by laminating two carcass plies (13A, 13B) made of coating organic fiber cords with coating rubber. Furthermore, the organic fiber cords of the two carcass plies (13A, 13B) have cord angles in the range of 80 [deg] or more and 100 [deg] or less with respect to the tire circumferential direction. Furthermore, the breaking strength Tcs [N / 50 mm] per 50 [mm] width of each of the two carcass plies (13A, 13B) is in the range of 17 ≤ Tcs / OD ≤ 120 with respect to the tire outer diameter OD [mm].
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