All-steel transverse-cord tyre with reinforced layer at tyre bead

Abstract

The invention relates to an all-steel meridian giant embryo which has a reinforced layer,wherein, a steel wire cord reinforced layer is coated on a tire casing cord layer and a tire casing cord revised coating layer. the steel wire cord reinforced layer has is U-shaped and the outer endpoint thereof is not higher than the height of a wheel felloe flange; and a fiber cord reinforced layer is arranged outside the inner endpoint of the steel wire cord reinforced layer. The invention strengthens the rigidity of the tyre bead, reduces deformation, decreases the shearing force of the tire casing cord layer and the tire casing cord revised coating layer to tyre rubber, and improves the carrying capacity of the bead part of the tyre in a large scale. Due to the fact that the steel wire cord reinforced layer reinforces the main weak part of the bead, the security and stability of running are increased and the service life of the tyre is prolonged. In addition, the outer endpoint of the steel wire cord reinforced layer is not higher than the height of the wheel felloe flange, so that when being forced, the outer endpoint of the steel wire cord reinforced layer can not be tilted without the support of the wheel felloe.

Description

(1) Technical field: [0001] The invention relates to an all-steel radial giant tire, in particular to an all-steel radial giant tire with a reinforcing layer on the bead. (two) background technology: [0002] Compared with bias tires, radial tires have fewer carcass plies and soft sidewalls. If the bead is not rigid enough, the tire will have poor stability when driving. In addition, due to the inconsistent deformation of the steel cords of the carcass ply and the rubber layer when they are stressed, the stress distribution is different. Therefore, there is a reciprocating shear force between the carcass ply and the rubber layer during use. This kind of shear force increases the local temperature of the bead, which makes the rubber aging easy to delaminate, and the shear force itself will also delaminate the bead. Moreover, in order to increase the rigidity of the bead, the hardness of the rubber at the tire bead is generally higher. Therefore, the rubber here has poor toug...

AI Technical Summary

Problems solved by technology

[0002] Compared with bias tires, radial tires have less carcass plies and soft sidewalls. If the bead is not rigid enough, the tire will have poor stability when driving.

In addition, due to the inconsistent deformation of the steel cords of the carcass ply and the rubber layer when they are stressed, the stress distribution is different. Therefore, there is a reciprocating shear force between the carcass ply and the rubber layer during use. This kind of shear force makes the local temperature of the bead rise, making the rubber aging easy to delaminate, and the shear force itself will also delaminate the bead

Moreover, in order to increase the rigidity of the bead, the hardness of the rubber at the tire bead is generally higher. Therefore, the rubber here has poor toughness, brittle texture, and is easy to crack under repeated bending, especially for all-steel radial giant tires. It needs to carry a large load. When driving at high speed, cracks, bulges and slits are prone to occur in the bead, which not only reduces the safety performance of the tire, but also shortens the service life of the tire.

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