摘要:
A tire with a crown reinforcement that comprises at least three plies of reinforcing elements. At least a first profiled element P1 has an axially outer end that is situated at a distance from the equatorial plane of the tire which is less than the distance separating the plane from the end of a second ply. The profiled element P1 is radially separated from the radially outer liner C1 of a first ply by a second profiled rubber compound element G1. At least a third profiled element P2 has an axially outer end that is situated at a distance from the equatorial plane of the tire which is less than the distance separating the plane from the end of a third ply. The profiled element P2 is radially separated from the radially inner liner C2 of the first ply by a fourth profiled rubber compound element G2. The profiled rubber compound elements P1, P2 and G1, G2 and the liners C1, C2 have respective tensile secant moduli of elasticity at 10% elongation MP1, MP2, MG1, MG2, MC1, MC2 such that MC1≧MG1>MP1 and MC2≧MG2>MP2.
摘要:
A tire includes a radial carcass reinforcement surmounted by a crown reinforcement formed of at least one working reinforcement having two plies of inextensible metallic reinforcement elements, parallel to each other within each ply and crossed from one ply to the next and forming with the circumferential direction angles &agr;1 and &agr;2 between 10° and 45,° and at least one protective ply. The axial widths L1 and L2 of the working plies and the axial width L3 of the at least one protective ply are such that L3
摘要:
The invention relates to improving the endurance of the beads of a radial tire for a heavy vehicle of construction plant type, by reducing the cracking that starts at the surface of contact between a first polymer filling material that is radially furthest towards the inside and in contact with the bead wire and a second polymer filling material that is radially on the outside of the first polymer filling material. According to the invention, a transition element, made of a polymer transition material, is in contact, via its radially inner face, with the first polymer filling material and is in contact, via its radially outer face, with the second polymer filling material, and the elastic modulus at 10% elongation of the polymer transition material is somewhere between the respective elastic moduluses at 10% elongation of the first and second polymer filling materials.
摘要:
A heavy vehicle tire comprising at least four working plies formed of reinforcing elements which, from one ply to the next, cross one another, and comprising at least one protective ply. The tire is supplemented on each side of the circumferential mid-plane by a single working half-ply the reinforcing elements of which make an angle greater than 30° with the circumferential direction, the half-ply being radially on the inside of and adjacent to the radially outermost continuous working ply, its axially outer end being axially on the outside of the ends of the continuous working plies, and the reinforcing elements of the half-ply, the reinforcing elements of the radially outermost continuous working ply and the reinforcing elements of the protective ply the end of which is axially on the outside of the ends of the working plies being oriented in the same direction.
摘要:
The invention relates to a tire having a radial carcass reinforcement, surmounted by a crown reinforcement comprising at least two plies of reinforcement elements which are parallel to each other within each ply, said two plies being of unequal axial widths. According to the invention, at least one first profiled element P of rubber mix separates the axially widest ply of reinforcement elements from at least one end of a second ply, axially narrower than the axially widest ply, the axially outer end of said first profiled element P being located at a distance from the equatorial plane of the tire which is less than the distance between said plane and the end of the axially widest ply of reinforcement elements, said profiled element P being radially separated at least in part from the liner C of said axially narrower ply of reinforcement elements by a second profiled element of rubber mix G, and said first and second profiled elements of rubber mix P and G and said liner C having secant modules of elasticity under tension at 10% elongation MP, MG, MC respectively such that MC≧MG>MP.
摘要:
A tire having a radial carcass reinforcement, which is surmounted by a crown reinforcement including at least two plies of reinforcement elements, which are crossed from one ply to the next, the two plies being of unequal axial widths, characterized in that each edge of the ply which is axially least wide is separated from the axially widest ply by a profiled element P of rubber mix, the profiled element P itself being separated from the liner C of the least wide ply by an edging rubber G, the profiled element P, the edging rubber G and the liner C having respectively moduli of elasticity at 10% elongation MP, MG, MC such that MC≧MG>MP.
摘要:
A technique for improving the durability of the beads of a radial tire for a heavy vehicle of the civil engineering type, by reducing the rate of spread of cracks initiated at the turned-back end of carcass reinforcement and the spread through the coating, edge-binding and filler polymer materials. A transition element (25), made of a transition polymer material, is at least partially in contact, on its axially external face, with the edge-binding polymer material (22) and, on its axially internal face, with a filler polymer material (23b), the radially external (E25) and radially internal (I25) ends of the transition element are respectively radially on the outside of and radially on the inside of the end of the turned-back portion of carcass reinforcement, and the elastic modulus at 10% elongation of the transition polymer material is somewhere between the respective elastic moduli at 10% elongation of the edge-binding polymer material and of the filler polymer material with which the transition element is in contact.
摘要:
The invention relates to improving the endurance of the beads of a radial tire for a heavy vehicle of construction plant type by reducing the cracking that starts on the axially outer face of the turn-up and spreads through the polymer coating and filler materials. According to the invention, a transition element made of a polymer transition material, is in contact, via its axially inner face, with the polymer coating material of the axially outer face of the turn-up and, via its axially outer face, with the polymer filler material, and the elastic modulus at 10% elongation of the polymer transition material is somewhere between the respective elastic moduluses at 10% elongation of the polymer coating material and of the polymer filler material.
摘要:
A technique for improving the durability of the beads of a radial tire for a heavy vehicle of the civil engineering type, by reducing the rate of spread of cracks initiated at the turned-back end of carcass reinforcement and the spread through the coating, edge-binding and filler polymer materials. A transition element (25), made of a transition polymer material, is at least partially in contact, on its axially external face, with the edge-binding polymer material (22) and, on its axially internal face, with a filler polymer material (23b), the radially external (E25) and radially internal (I25) ends of the transition element are respectively radially on the outside of and radially on the inside of the end of the turned-back portion of carcass reinforcement, and the elastic modulus at 10% elongation of the transition polymer material is somewhere between the respective elastic moduli at 10% elongation of the edge-binding polymer material and of the filler polymer material with which the transition element is in contact.
摘要:
The invention relates to a tire in which at least one first profiled element P of rubber mix separates the axially widest ply of reinforcement elements from at least one end of a second ply, axially narrower than the axially widest ply, the axially outer end of said first profiled element P being located at a distance from the equatorial plane of the tire which is less than the distance between said plane and the end of the axially widest ply of reinforcement elements, said profiled element P being radially separated at least in part from the liner C of said axially narrower ply of reinforcement elements by a second profiled element of rubber mix G, and said first and second profiled elements of rubber mix P and G and said liner C having secant modules of elasticity under tension at 10% elongation MP, MG, MC respectively such that MC≧MG>MP.