All-steel-cord bead-protection radial tire

Abstract

The invention provides an all-steel-cord bead-protection radial tire and belongs to the technical field of radial tires. The radial tire comprises a carcass ply and a carcass turn-up end, wherein the turn-up end is 5-10 mm below the apex of a linear section with the inclination angle of 60 degrees in a bead-protection rim contour curve, and a narrow groove or a wide groove of a tire bead is formed above the carcass turn-up end. The lower edge of the narrow groove or the wide groove of the tire bead is positioned at the apex of the linear section with the inclination angle of 60 degrees in the bead-protection rim contour curve. The lower edge of the narrow groove or the wide groove of the tire bead forms the boundary which can determine whether the side of the tire bead and a rim are contacted or not. During usage of the tire, the part below the lower edge of the narrow groove or the wide groove of the tire bead is always closely contacted with the bead-protection rim, the surface of the groove of the tire bead is prevented from being contacted with the rim edge due to the design of the groove, and the problem of wear of surface rubber parts on the side of the tire bead is fundamentally solved.

Description

technical field [0001] The invention relates to an all-steel bead protected radial tire, which belongs to the technical field of radial tires. Background technique [0002] Full bead radial tires are installed and used together with special retainer rims, and the contact area between the rim and the bead covers the end of the carcass turnup in the bead (see figure 1 ), although the problem of stress concentration at the end of the carcass ply turn-up is effectively avoided, but because the bead thinning design is adopted for this kind of bead protection radial tire, the thickness of the bead part of the tire is relatively thin, and the bending deformation of the tire is large during driving , when the bead repeatedly bends and deforms, there is a ring-shaped area with a width of only about 10mm near the edge of the contact area between the rim and the bead, and the tire contacts and separates from the rim rim every time it rotates. , During the frequent contact and separati...

AI Technical Summary

Problems solved by technology

[0002] Full bead radial tires are installed and used together with special retainer rims, and the contact area between the rim and the bead covers the end of the carcass turnup in the bead (see figure 1 ), although the problem of stress concentration at the end of the carcass ply turn-up is effectively avoided, but because the bead thinning design is adopted for this kind of bead protection radial tire, the thickness of the bead part of the tire is relatively thin, and the bending deformation of the tire is large during driving , when the bead repeatedly bends and deforms, there is a ring-shaped area with a width of only about 10mm near the edge of the contact area between the rim and the bead, and the tire contacts and separates from the rim rim every time it rotates. , During the frequent contact and separation process, the rubber parts in the ring area of ​​only about 10mm on the surface of the bead will slide and rub against the rim and rim, and severe wear will inevitably occur, leading to early damage to the tire

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