Radial tire bead

Abstract

The invention discloses a radial tire bead. The radial tire bead comprises a lining layer (1), a carcass fabric (2), a bead strengthening wirecord fabric (3), bead rubber (5) and sidewall rubber (6), wherein the lining layer (1), the carcass fabric (2) and the bead strengthening wirecord fabric (3) wrap the inner side of the bead, and the bead rubber (5) and the sidewall rubber (6) wrap the outer side of the bead. The radial tire bead is characterized by further comprising three composite rubber cores, wherein the three composite rubber cores include a filling rubber core (9), a hard triangular rubber core (4) and a soft triangular rubber core (8), the hard triangular rubber core (4) is positioned inside, the soft triangular rubber core (8) is positioned outside, the filling rubber core (9) is positioned on one side, which is close to the inner side of the bead, of the hard triangular rubber core (4), and the filling rubber core (9), the hard triangular rubber core (4) and the soft triangular rubber core (8) are wrapped by the carcass fabric (2) and the bead strengthening wirecord fabric (3) in sequence from inside to outside. According to the radial tire bead, the support performance of the tire bead can be effectively improved, and the deflection rigidity of the bead in the condition of high load is effectively improved.

Description

technical field [0001] The invention relates to a radial tire bead, in particular to a bead of an all-steel radial tire, and belongs to the technical field of tire manufacturing. Background technique [0002] The existing bead structure of all-steel radial tires includes a hard apex rubber core on the inside, a soft apex rubber core on the outside, carcass cord, nipple reinforced steel cord, nipple rubber, sidewall rubber, nylon curtain surface, and inner lining. Due to the current non-standard management of road conditions, and the frequent use of vehicles such as severe overloading and high air pressure, the requirements for vehicle tires are relatively high. As the structure of a common tire, the bead structure of the above-mentioned tire has insufficient supporting performance and large deformation, and is bent on the rim flange. It is easy to form stress concentration, which leads to quality problems such as rim voids, rim cracks, and blasting of tires. SUMMARY OF T...

AI Technical Summary

Problems solved by technology

Due to the current road condition management is not standardized, and the vehicles are often heavily overloaded and the air pressure is high, so the requirements for the tires of the vehicles are relatively high

However, as a commonly used tire structure, the bead structure of the above-mentioned tire has insufficient support performance and large deformation, and is bent on the rim flange. It is easy to form stress concentration, which will lead to quality problems such as ring voids, ring cracks, and blasting of tires

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