All-steel radial tire toe opening structure

Abstract

The invention provides an all-steel radial tire toe opening structure. The all-steel radial tire toe structure comprises a carcass ply surrounding toe opening steel wire rings and a toe opening reinforcing layer, the steel wire rings are obliquely arranged at an angle of 10-30 degrees, namely, the inclination angle between the bottom surfaces of the steel wire rings and the tire tread is 10-30 degrees; the toe opening reinforcing layer is reversely wrapped around the toe opening steel wire rings; the vertical line is a vertical line which passes through the carcass ply turn-up endpoint A and is vertical to the carcass ply; the vertical position of the toe opening reinforcing layer positive wrapping end point C is higher than the vertical position of the intersection point of the vertical line and the toe opening reinforcing layer; the vertical position of the toe reinforcing layer turn-up endpoint B is lower than the vertical position of the carcass ply turn-up endpoint A, so that theproblem that cracks are easily generated at the carcass ply turn-up endpoint is solved, and the bearing capacity of the all-steel radial tire, particularly the toe opening part, is greatly improved. The invention belongs to the technical field of tire structure optimization.

Description

technical field [0001] The invention relates to a toe structure of an all-steel radial tire, which belongs to the technical field of tire structure optimization. Background technique [0002] The toe structure of an all-steel radial tire usually includes a carcass cord surrounding the toe traveler and a toe reinforcement layer surrounding the carcass cord (generally image 3 In the existing toe structure, when the tire is in use, the slit part will be greatly deformed, because the steel cord of the carcass cord is relatively rigid, and the rubber of the tire is relatively soft, so Under the same pressure, the deformation between the two is different, resulting in a large shear force between the end point of the steel cord of the carcass cord (the end point after the carcass cord is turned up) and the rubber of the tire (such as Figure 4 As shown), the rubber of the tire will quickly crack under the high-frequency shear force at the end of the steel cord, resulting in tire d...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a toe opening structure of an all-steel radial tire to solve the problem that cracks are easily generated at the ends of the carcass ply turn-up, and greatly improve the bearing capacity of the all-steel radial tire, especially the toe opening.

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