Tyre with double-anchoring casing ply

A tire and main fixing technology, which is applied to tire parts, tire edges, wheels, etc., to achieve the effect of simplifying conception and manufacturing

CN1319764CInactive Publication Date: 2007-06-06MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2007-06-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a tyre comprising at least a carcass-type reinforcing structure, which extends circumferentially from the bead to the sidewall, and a reinforcing crown ply. Moreover, each of the beads comprises a main anchoring area which is used to support the reinforcing structure. The inventive tyre is provided with a wheel rim protector comprising a rubber piece, which extends axially and externally in relation to the sidewall, and at least one secondary anchoring area consisting of numerous circumferential bead wires. Said wires co-operate with an adjacent portion of a secondary reinforcing structure by means of a rubber anchoring compound. The anchoring is distributed between the bead and the rim protector, thereby creating new architectural and design possibilities, for example, enabling optimum use of the restricted space of the bead. In this way, for example, the presence of the secondary anchoring area at the rim protector contributes greatly to improving the performance of the tyres, particularly in terms of driftability.
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Description

technical field

[0001] The present invention relates to tires. More particularly, it relates to a tire having a rim guard acting as an anchoring point for at least one carcass-type reinforcing structure. Background technique

[0002] The reinforcement of the current tire carcass is composed of one or several layers of ply (according to the manufacturing process, the "carcass ply" in the semi-finished state is customarily called ply), and the reinforcing cords on it are usually radial of. The fixing or support of these plies or reinforcements is generally achieved by winding up a portion of the ply around bead wires arranged in the beads of the tire.

[0003] Patent application WO9964225A discloses a tire provided with a double carcass structure with substantially axial fastening zones on at least one carcass. The type of fixation is parallel to the bead seat. It includes curved portions where stress concentrations may occur.

[0004] In addition, there are currently tir...

Examples

Embodiment Construction

[0029] "Radially upward" or "radially upward", and "radially outward" herein refer to the direction of the larger diameter, for reference.

[0030] In this specification, the term "cord" can refer to a single wire, or multiple wires, or a combination such as a thick cord, a thin rope, or even any other type of equivalent combination, regardless of the material of these cords. What and what process is used to improve adhesion to rubber, such as surface treatment or coating or pre-coating with glue.

[0031] It is well known that the carcass-type reinforcing structure is radial because its cords are arranged at 90°, but it can also be arranged at about 90° according to the present statement.

[0032] By "characteristics of the cord" is meant its dimensions, composition, mechanical properties (especially its modulus), chemical properties, etc.

[0033] Figure 1 shows the lower region of a first embodiment of a tire according to the invention, in particular its bead 1 portion. T...