CN115257244A

CN115257244A - High-durability SUV tire

Info

Publication number: CN115257244A
Application number: CN202210918944.1A
Authority: CN
Inventors: 王�锋; 宋爱芬; 马小刚; 朱丽艳; 孙建超; 杨宝忠; 吕建强
Original assignee: Shandong Linglong Tyre Co Ltd
Current assignee: Shandong Linglong Tyre Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-01

Abstract

The invention relates to the technical field of tires, in particular to a high-durability SUV tire, which comprises two tire beads, a tire body and a tire side, wherein each tire bead comprises a tire bead core and an apex extending from the tire bead core to the radial outer side of the tire; the carcass including a ply extending between two of the beads; the cord fabric layer is provided with at least three layers; the sidewalls are disposed on a surface of the carcass layer located on an axially outer side of the tire; the bending endpoints of the plurality of cord fabric layers are dispersedly arranged on one side of the tire side; at least one of the plies is turned up around the bead core from the axially inner side toward the outer side, and at least one of the plies is turned up around the bead core from the axially outer side toward the inner side. The cord fabric layer is reversely wrapped and then is wrapped, so that the rigidity of the tire body is improved, end point concentration is avoided, and shearing heat generation is reduced.

Description

High-durability SUV tire

Technical Field

The invention relates to the technical field of tires, in particular to a high-durability SUV tire.

Background

At present, the tire has the problem of delamination caused by the heat of flexure between a tire bead part and a tire body cloth and between a tire side rubber and the tire body cloth during running. In general, in the carcass design of a PCR tire, one or two layers of polyester cords having a large wire diameter and a high strength are used in accordance with the magnitude of a load, and a turn-up design method is performed at the same time, and this design is suitable for a low-profile tire having a relatively high speed, but in the case of an SUV tire having a profile ratio of 65 or more, a load index of 110 or more, and a speed class H or more, a shear force at a bead portion is large, a deflection deformation is large, heat generation is large, and the tire is likely to be delaminated at the bead portion, thereby affecting safety and service life.

Therefore, it is necessary to provide a high endurance SUV tire.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a high-durability SUV tire. With the tire structure of the invention, the ply bending endpoints are dispersedly arranged

In order to realize the purpose, the technical scheme provided by the invention is as follows:

the invention provides a high-durability SUV (sports utility vehicle) tire, which comprises two tire beads, a tire body and a tire side; a bead including a bead core and an apex extending radially outward of the tire from the bead core; a carcass comprising a ply extending between two beads; the cord fabric layer is at least provided with three layers; the sidewall is arranged on the surface of the cord fabric layer, which is positioned at the axial outer side of the tire; the bending end points of the multi-layer cord fabric layer are dispersedly arranged on one side of the tire side; at least one ply is turned up around the bead core from the axially inner side toward the outer side, and at least one ply is turned up around the bead core from the axially outer side toward the inner side.

In some of these embodiments, the first ply is turned back around the bead core from the axially inboard side toward the outboard side; the second ply is turned up around the bead core from the axially inner side toward the outer side; the third curtain cloth layer is bent around the bead core from the axial outer side to the inner side for positive wrapping; in the tire radial direction, the positive-wrapped end point of the third ply is closer to the tip end portion of the bead than the highest point of the bead core.

In some of these embodiments, the turnup point of the first ply is closer to the apex of the bead than the apex point in the tire radial direction.

In some embodiments, the turn-up end of the first ply is 1/2 the height of the apex in the radial direction.

In some of these embodiments, the turnup end point of the second ply is further from the apex of the bead than the apex end point in the tire radial direction.

In some of these embodiments, the turn-up end of the second ply is located between the widest point of the tire and the peak of the bead in the radial direction of the tire.

In some of these embodiments, the positive wrap end point of the third ply is located on the heel side of the tire.

In some of these embodiments, the first ply, the second ply, and the third ply have a uniform thickness.

The invention provides the application of the high-durability SUV tire, which is applied to the SUV tire with the flat ratio of more than 65 series, the speed grade of more than H grade and the load of more than 110.

Compared with the prior art, the invention has the beneficial effects that:

according to the high-durability SUV tire and the application thereof, the common design method is changed through the design of the multilayer tire body cloth, the rigidity of the tire body is enhanced, the deformation is reduced, and the durability of the tire ring part is improved; during molding, the rigidity of the tire body is improved, meanwhile, end point concentration is avoided, and shearing heat generation is reduced by a design method of turning over the tire body first and then turning over the tire body; the multi-layer polyester cord with small wire diameter is adopted, so that the shearing force and deformation between carcass cords are reduced, the heat generation of the tire ring part is reduced, and the service life of the tire is prolonged; the tire is suitable for SUV tires with the aspect ratio of more than 65 series, the speed grade of more than H grade and the load of more than 110.

Drawings

FIG. 1 is a schematic view of a high endurance SUV tire in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of end point markers in one embodiment;

FIG. 3 is a prior art tire design.

In the figure, 1, sidewall; 2. a bead core; 3. triangular glue; 4. a first ply; 5. a second ply; 6. a third ply; p ₁ The turn-up end point of the first cord fabric layer; p ₂ The turn-up end point of the second cord fabric layer; p ₃ The positive wrapping end point of the third curtain cloth layer; q ₁ The apex of the apex core; q ₂ And the bottom end point of the triangular rubber core.

Detailed Description

The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as is familiar to those skilled in the art. In addition, any methods or materials similar or equivalent to those described herein can also be used in the present application.

As shown in fig. 1, the SUV tire is a part of a cross section perpendicular to the circumferential direction, and in the drawing, the vertical direction is the radial direction of the tire, the horizontal direction is the axial direction of the tire, and the direction perpendicular to the paper surface is the circumferential direction of the tire.

The SUV tire is provided with at least a crown, a shoulder, a sidewall 1, a bead, a carcass, and a cushion layer. The tire is of the tubeless type. The tire is mounted on an SUV vehicle. The SUV tire has a sidewall 1 with a radially outer end joined to a shoulder and a radially inner end joined to a bead.

As shown in fig. 1, the bead includes a bead core 2, and an apex 3 extending radially outward from the bead core 2; the bead core 2 is annular and comprises a non-stretchable wire wound therearound. A typical material for the wire is steel. The apex 3 becomes thinner toward the radially outer side. The apex 3 is composed of a crosslinked rubber having high hardness.

The carcass comprises at least three cord plies which are sequentially arranged along the outer side of the tire bead; the bending end points of the multi-layer cord fabric layer are dispersedly arranged on one side of the tire; the innermost ply is turned back around the bead core from the axially inner side toward the outer side, and the outermost ply is turned back around the bead core from the axially outer side toward the inner side. Fig. 3 is a schematic view of a conventional tire. According to the invention, through the design of a multi-layer carcass structure, the requirement on the strength of the carcass can be met, the rigidity of the carcass is enhanced, and the flexural deformation and heat generation of the carcass are reduced.

In the present embodiment, the carcass includes a first ply 4, a second ply 5 and a third ply 6 arranged in this order along the outside of the bead; a first ply 4, a second ply 5 and a third ply6 are bridged between the beads on both sides and extend along the tread and the sidewalls 1. Wherein the first ply 4 is turned upside down around the bead core 2 from the axially inner side toward the outer side, the second ply 5 is turned upside down around the bead core 2 from the axially inner side toward the outer side, and the third ply 6 is turned upside down around the bead core 2 from the axially outer side toward the inner side; the positive wrapping end point P of the third ply 6 in the tire radial direction ₃ Closer to the apex of the bead than the 2 highest point of the bead core. The invention adopts a forming mode of reversely wrapping two layers of tire bodies and positively wrapping the outermost layer of tire body, and simultaneously disperses the end points of the cord thread under the condition of increasing the number of layers of tire bodies, thereby avoiding stress concentration.

In this embodiment, the ply comprises a plurality of cords and a topping in parallel; wherein the cords are composed of organic fibers. As a preferable organic fiber, a multilayer polyester cord having a small wire diameter is used.

In some embodiments of the present application, the turnup point P of the first ply 4 is in the tire radial direction ₁ Radial triangle rubber core top end point Q ₁ Closer to the tip of the bead.

In some embodiments of the present application, the turn-up end point of the first ply 4 is greater than the apex 3 by 1/2 of the height in the radial direction. I.e. the turnup point P of the first ply 4 ₁ Distance H to the bottom end point of the triangular rubber 3 core ₁ Greater than the turn-up end point P of the first ply 4 ₁ Distance H to apex of apex 3 core ₂ 。

In some embodiments of the present application, the turnup point P of the second ply 5 is in the radial direction of the tire ₂ Apex point Q of rubber core ₁ Further away from the tip of the bead.

In some embodiments of the present application, the turnup end point P of the second ply 5 in the tire radial direction ₂ Between the widest part of the tire and the peak of the bead.

In some embodiments of the present application, the positive end point P of the third ply 6 ₃ On the heel side of the tire.

In some embodiments of the present application, the first, second, and

third plies

4, 5, 6 are of uniform thickness.

The invention provides the application of the high-durability SUV tire, which is applied to the SUV tire with the flat ratio of more than 65 series, the speed grade of more than H grade and the load of more than 110 grade.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A high endurance SUV tire comprising two beads, a carcass and sidewalls, characterized in that,

the bead comprises a bead core and an apex extending from the bead core to the radial outer side of the tire;

the carcass including a ply extending between two of the beads; the cord fabric layer is provided with at least three layers;

the sidewalls are disposed on a surface of the carcass layer located axially outward of the tire;

the bending end points of the plurality of cord fabric layers are dispersedly arranged on one side of the tire side; at least one of the plies is turned up around the bead core from the axially inner side toward the outer side, and at least one of the plies is turned up around the bead core from the axially outer side toward the inner side.

2. A high endurance SUV tire according to claim 1, wherein said plies are three layers, a first ply, a second ply and a third ply;

the first ply is turned back around the bead core from the axially inner side toward the outer side;

the second ply is turned back around the bead core from the axially inner side toward the outer side;

the third ply is folded around the bead core from the axially outer side toward the inner side for positive wrapping;

in the tire radial direction, a positive-wrap end point of the third ply is closer to a peak end portion of the bead than a highest point of the bead core.

3. The SUV tire of claim 2, wherein the turnup point of the first ply is closer to the peak of the bead than the apex point in the tire radial direction.

4. A high endurance SUV tire according to claim 2 or 3, wherein the turn-up end point of said first ply is higher than the apex radial 1/2 height.

5. A high endurance SUV tire according to claim 2, wherein a turn-up end point of said second ply is further from a peak of said bead than said apex of said apex in said tire radial direction.

6. A SUV tire as claimed in claim 2 or 5 wherein the turnup point of the second ply is located between the widest of the tire and the peak of the bead in the radial direction of the tire.

7. A high endurance SUV tire according to claim 2, wherein said positive wrap end point of said third ply is located on the heel side of said tire.

8. A high endurance SUV tire according to claim 2, wherein said first, second and third plies are of uniform thickness.