Low-section all-steel radial tire with zero-degree winding belted layer

Abstract

The invention relates to a low-section tire, in particular to a low-section all-steel radial tire with a zero-degree winding belted layer. The belted layer of the tire consists of a first belt layer,a zero-degree winding belted layer and a second belted layer, wherein the first belted layer and the second belted layer adopt conventional belted layers, and the first belted layer and the second belted layer cross by an angle. The zero-degree winding belted layer is wound with a single steel wire or multiple steel wires side by side by 0-2 degrees, and the ratio delta W1 of the width W0 of the zero-degree winding belted layer to the width Wb of the traveling surface is 0.75-0.9. The tire adopts the zero-degree winding belted layer and two crossed ordinary belted layers to replace a normal four-layer belted layer structure, the belted layer structure can effectively clamp the circumferential direction of the tire, improve the shape of the footprint of the tire, maintain the stability of the outer contour and better handling throughout the life cycle of the tire, and at the same time, the lightweight design of the tire is realized.

Description

technical field [0001] The invention relates to a low-section tire, in particular to a low-section all-steel radial tire with a 0-degree winding belt layer. Background technique [0002] Due to the excellent handling and stability of low-profile tires, and the stricter national policy on vehicle load, it can be predicted that the future development trend of tires will be low profile, flattening, and miniaturization. Due to the low section height of low-end tires, the shoulder and bead stress concentration area is closer to the sidewall deformation area, which makes the tire shoulder and bead deformation much larger than the normal aspect ratio tire, especially the smaller the aspect ratio. The greater the deformation of the tire, the second is that these two areas are concentrated areas of steel wire ends, resulting in the decrease of the circumferential clamping effect of the steel wire ends after the tire has been used for a period of time, resulting in abnormal expansion ...

AI Technical Summary

Problems solved by technology

This will greatly increase the weight of the tire, make the tire harder and lead to poor cushioning performance, lower heat dissipation performance and make the tire more prone to thermal damage, and simply increasing the rigidity cannot completely eliminate the abnormal expansion of the tire in the later stage

[0004] figure 1 It is a normal four-layer belt structure. Since the two ends of each layer of belt are free endpoints without constraints, as the tire continues to deform and twist, strain fatigue will appear in the belt end area, resulting in overall slack in the belt, making the tire An abnormal circumferential outward expansion occurs, resulting in a change in the imprint ( figure 2 is the change trend of the impression), which will cause the decrease of the tire handling performance, the stability of the outer contour of the tire will become worse, and the best grounding performance will be lost, which will cause abnormal wear

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