Tires in which the carcass reinforcement in the bead area is reinforced by layers of reinforcing elements
A technology of reinforcing elements and crown reinforcements, applied to the reinforcing layer of pneumatic tires, tire parts, tire edges, etc., can solve the problems of improving tire resistance, and achieve good flexibility, high bending resistance, and durability improved effect
Active Publication Date: 2015-11-25
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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Problems solved by technology
The presence of layers of reinforcing elements wound around the bead wire also makes it possible to improve the tire's resistance to such stresses
Method used
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Embodiment Construction
[0118] exist figure 1 , a tire 1 of size 315 / 60R22.5 comprises a radial carcass reinforcement 2 anchored in two beads 3 surrounding a bead wire 4 . The carcass reinforcement 2 is formed from a single layer of metal cables. The carcass reinforcement 2 is sheathed by a crown reinforcement 5 , which is itself covered by a tread 6 . The crown reinforcement 5 is formed radially from the inside to the outside as follows:
[0119] - a triangular layer 51 formed over the entire width of the ply by continuous non-clad, non-extensible metal cables 2+7×0.28 oriented at an angle equal to 65°;
[0120] - a first working layer 52 formed over the entire width of the ply by continuous non-clad non-extensible metal cables 0.12+3+8×0.35 oriented at an angle equal to 18°;
[0121] - a second working layer 53 formed over the entire width of the ply by continuous unclad non-extensible metal cables 0.12+3+8×0.35 at an angle equal to 18° to said the metal cable cross orientation of the first wo...
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Abstract
Tire having a radial carcass reinforcement anchored in each bead by an upturn around a bead wire, reinforced by at least one layer of reinforcing elements turned up around the bead wire, one end of said at least one layer of reinforcing elements being axially on the outside of the carcass reinforcement upturn and radially on the inside of the end of said upturn, the other end turned up around the bead wire being axially on the inside of the carcass reinforcement. The reinforcing elements are non-wrapped metal cords with saturated layers, having, in a permeability test, a flow rate of less than 5 cm3 / min and the distance between the end, axially on the outside of the carcass reinforcement upturn, of said at least one layer of reinforcing elements turned up around the bead wire and the end of the carcass reinforcement upturn is less than 5 mm.
Description
technical field [0001] The present invention relates to a tire with radial carcass reinforcement, more particularly to a tire intended to equip heavy goods vehicles traveling at sustained speeds, such as vans, tractors, trailers or buses. Background technique [0002] Typically, in heavy goods vehicle tyres, the carcass reinforcement is anchored on either side in the bead area and is radially covered by a crown reinforcement consisting of at least two superimposed layers of The layers are formed by cords or cables parallel within each layer and crossed from one layer to the next forming an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may further be covered by at least one layer called protective layer formed by advantageously malleable metallic reinforcing elements called elastic elements. It may also comprise layers of low ductility metal cords or cables forming an angle between 45° and 90° with the c...
Claims
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IPC IPC(8): B60C15/06D07B1/16
CPCB60C15/0635B60C9/0007B60C15/06B60C2015/0678B60C2015/0685D07B1/062D07B1/0626D07B1/0633D07B2201/2046D07B2501/2046Y10T152/10828
Inventor G·萨拉兹A·德乔治A·多明戈B·格里西尼
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN