A Pneumatic Radial Tire with Improved Endurance Performance

Abstract

The invention provides a pneumatic radial tire with improved endurance performance, which includes a carcass, the carcass is divided into a carcass layer, a shoulder part, a sidewall part and a bead part, and the carcass layer is wound from the inside to the bead core. The outside includes a turn-up layer and a layer of over-wrap, the bead core and apex rubber are placed in the turn-up layer, and the slit protection rubber is placed outside the over-wrap in the tire axial direction; the turn-up Between the axially outer side of the layer and the axially inner side of the spigot cover, a layer is set along the turn-up layer from 30% to 34% of the tire section height to 4% to 7% of the tire section height Sidewall adhesive reinforcing rubber strips, the side edges of the belt layers are provided with edge rubber for preventing creeping between the belt layers. On the basis of maintaining the formula and pattern without changing and ensuring excellent load-carrying performance, the present invention limits the size and size of each component at the same time by increasing the belt edge glue, the positive bag structure and the sidewall adhesive reinforcing strip structure. Relative position to improve the durability performance of the tire.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to a pneumatic radial tire for improving endurance performance. Background technique [0002] Endurance performance is an important indicator of pneumatic tires, especially for commercial trucks. Especially for tires in the domestic market, overloading and long-term driving are more serious. The current regulatory experiments can no longer meet the existing market demand, so more stringent technical requirements have been put forward, that is, overloading and long-term durability tests. The experiment time is increased from 34h (regulation value) in current regulations to 300h. [0003] According to the feedback from the research, the problems in the tire endurance test and actual use are mainly concentrated in the shoulders and rims. According to the finite element analysis, the stress at the end of the shoulder belt is the largest, and this area is the most prone to delamination. ...

AI Technical Summary

Problems solved by technology

Especially for tires in the domestic market, overloading and long-term driving are more serious. The current regulatory experiments can no longer meet the existing market demand, so more stringent technical requirements have been put forward, that is, overloading and long-term durability tests. The experiment time is increased from 34h (regulation value) in current regulations to 300h

[0003] According to the feedback from the research, the problems in the tire endurance test and actual use are mainly concentrated in the shoulders and rims. According to the finite element analysis, the stress at the end of the shoulder belt is the largest, and this area is the most prone to delamination. ; followed by the spigot, there are many sections in this area, such as cord, lining, RC\triangle glue, reinforcement layer, white glue, etc., the stress concentration at the end point, so it is very easy to cause the cord and RC glue to come off

[0004] In the prior art, the way to improve the tire durability is to use the strength of the carcass components to improve, but there is no solution to improve the durability by changing the structure of the tire shoulder and sidewall at the same time

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