CN218777370U

CN218777370U - Structure for improving high-speed durability of tire bead part of tire

Info

Publication number: CN218777370U
Application number: CN202222009672.1U
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: 2023-03-31
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to the technical field of tires, in particular to a structure for improving the high-speed durability of a bead part of a tire, wherein a tire body of the tire comprises a first cord fabric layer, a second cord fabric layer and a third cord fabric layer which are sequentially arranged along the outer side of the bead; the first ply is turned up around the bead core from the axially inner side toward the outer side, the second ply is turned up around the bead core from the axially inner side toward the outer side, and the third ply is turned up around the bead core from the axially outer side toward the inner side; the turnup end point of the second ply is positioned more outside than the turnup end point of the first ply in the radial direction, and the turnup end point of the third ply is lower than the highest point of the bead core and higher than the lowest point of the bead core in the radial height; the turn-up end point of the first cord fabric layer, the turn-up end point of the second cord fabric layer and the turn-up end point of the third cord fabric layer are all located on one side of the tire. 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

Structure for improving high-speed durability of tire bead part of tire

Technical Field

The utility model relates to a tire technical field, more specifically relates to a promote structure of high-speed durability of bead portion of tire.

Background

At present, the tire has the problem of delamination caused by the heat generated by the bending between the bead part and the carcass cloth and between the sidewall rubber and the carcass 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 structure for improving high-speed durability of a bead portion of a tire.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the current stage technique, the utility model provides a promote structure of the high-speed durability of bead portion of tire. Through the device of the utility model, can

In order to achieve the above purpose, the utility model provides a technical scheme does:

a structure for improving the high-speed durability of a tire bead part of a tire comprises a tire body, wherein the tire body comprises a first cord fabric layer, a second cord fabric layer and a third cord fabric layer which are sequentially arranged along the outer side of the tire bead; the first ply is turned up around the bead core from the axially inner side toward the outer side, the second ply is turned up around the bead core from the axially inner side toward the outer side, and the third ply is turned up around the bead core from the axially outer side toward the inner side; in the radial direction of the tire, the positive wrapping end point of the third cord layer is positioned between the highest point of the bead core and the lowest point of the bead core; the turn-up end point of the first cord fabric layer, the turn-up end point of the second cord fabric layer and the turn-up end point of the third cord fabric layer are all located on one side of the tire.

In some of these embodiments, the turn-up end point of the first ply is closer to the peak of the bead than the apex end point in the radial direction of the tire.

In some of these embodiments, the turn-up end of the first ply is 1/2 higher than the apex radial.

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 first, second and third plies include a plurality of cords in juxtaposition with a topping.

In some of these embodiments, the cords are multi-layered polyester cords.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a promote structure of the high-speed durability of bead portion of tire of embodiment changes common design method through multilayer matrix cloth design, strengthens the rigidity of matrix, reduces the deformation, promotes the bead portion durability of tire; the rigidity of the tire body is improved, meanwhile, the concentration of end points is avoided, and the shearing heat generation is reduced; the multi-layer polyester cord with small wire diameter is adopted, so that the shearing force and deformation among cord bodies are reduced, the heat generation of a bead part of the tire is reduced, and the service life of the tire is prolonged; the tire is suitable for SUV tires with a flat ratio of more than 65 series, a speed grade of more than H and a load of more than 110.

Drawings

FIG. 1 is a schematic structural diagram of the embodiment of the present invention for improving high-speed durability of a bead portion of a tire;

FIG. 2 is a schematic diagram of end point markers in an 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; p1, a turnup endpoint of the first ply; p2, the turn-up end point of the second ply; p3, a positive wrapping end point of the third curtain cloth layer; q1, a apex point; q2, triangle rubber bottom end point.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to 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.

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 side wall 1 of the SUV tire has 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 tyre body comprises a first cord fabric layer 4, a second cord fabric layer 5 and a third cord fabric layer 6 which are arranged along the outer side of the tyre bead in sequence; a first ply 4, a second ply 5 and a third ply 6 span between the beads on either side and extend along the tread and 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; turnup endpoint P of the second ply 5 ₂ Radially positioned at a turn-up end point P of the first ply 4 ₁ Further to the outside, the forward wrapping end point P of the third ply 6 ₃ The radial height is lower than the highest point of the bead core 2 and higher than the lowest point of the bead core 2.

In this embodiment, the ply comprises a plurality of cords juxtaposed with a topping; 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 Bitriangular rubber 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 Bitriangular rubber top end point Q ₁ Further away from the tip of the bead.

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 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 ply 4, the second ply 5, and the third ply 6 are of uniform thickness.

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

Claims

1. A structure for improving the high-speed durability of a bead part of a tire is characterized by comprising a tire body, wherein the tire body comprises a first cord fabric layer, a second cord fabric layer and a third cord fabric layer which are sequentially arranged outside the bead; the first ply is turned up-wrapped around the bead core from the axially inner side toward the outer side, the second ply is turned up-wrapped around the bead core from the axially inner side toward the outer side, and the third ply is turned up-wrapped around the bead core from the axially outer side toward the inner side; in the tire radial direction, the positive wrap end point of the third ply is located between the highest point of the bead core and the lowest point of the bead core;

the turn-up end point of the first cord fabric layer, the turn-up end point of the second cord fabric layer and the turn-up end point of the third cord fabric layer are all located on one side of the tire.

2. A structure for improving high-speed durability of a bead portion of a tire as claimed in claim 1, wherein a turn-up end point of said first ply is closer to a peak portion of said bead than an apex end point in a radial direction of said tire.

3. The structure for improving high-speed durability of a bead portion of a tire as claimed in claim 1, wherein said turn-up end point of said first ply is higher than the apex in the radial direction by 1/2 height.

4. A structure for improving high-speed durability of a bead portion of a tire as claimed in claim 3, wherein a turn-up end point of said second ply is farther from a tip end portion of said bead than said apex end point in the tire radial direction.

5. A structure for improving high-speed durability of a bead portion of a tire as claimed in claim 1 or 4, wherein a turn-up end point of said second ply is located between a widest point of said tire and a tip end portion of said bead in a radial direction of said tire.

6. The structure for improving high speed durability of a bead portion of a tire as claimed in claim 1, wherein said first ply, said second ply and said third ply comprise a plurality of cords and a topping arranged side by side.

7. The structure for improving the high-speed durability of the bead portion of a tire according to claim 6, wherein the cord is a multilayer polyester cord.