KR101849234B1 - Dual chafer structure of radial type racing tire - Google Patents

Abstract

Disclosed is a radial racing tire double chafer structure. The radial racing tire double chaser structure according to an embodiment of the present invention comprises: a bead unit having a body ply surrounding the outer surface of a bead core; and a first chafer and a second chafer disposed between the body ply and the bead unit. The body ply and the chafer are formed by arranging a plurality of nylon cords in a row and rolling a rubber, wherein the nylon cords of the first and second chafers cross each other with respect to the nylon cord of the body ply.

Description

Radial Type Racing Tire Double Chipper Structure {DUAL CHAFER STRUCTURE OF RADIAL TYPE RACING TIRE}

The present invention relates to a structure for reinforcing a bead portion of a tire, and more particularly, to a structure for reinforcing a bead portion of a tire, comprising a body ply extending from a tire tread portion and surrounding a bead portion, And a second chaser, each chaser having a plurality of nylon cords arranged in a first chaser flume angle and a second chaser flute angle, wherein the first chaser and the second chaser comprise a first chaser and a second chaser, Is an invention relating to a structure having opposing angles (+, -) with respect to a radial type body fly.

The present invention also relates to a radial type racing tire in which the durability of the bead portion is improved by doubly reinforcing the chaper between the body fly and the bead portion.

The present invention relates to a racing tire, and more particularly to a radial type racing tire in which the durability of a bead portion is improved by doubly reinforcing a chaser between a body ply and a bead portion.

Generally, it is important to reinforce the bead portion near the tire rim so that the racing tire can withstand torsion during acceleration, acceleration, and cornering. The stress normally applied to the tire is largest at the portion contacting the wheel engaged with the rim, and when the threshold value is exceeded, the bead portion is destroyed and deviated from the rim.

As shown in FIG. 1, a conventional bias type racing tire is a rubber layer attached to the inside of a tire, and includes an inner liner for absorbing impact from the road surface to protect the bead portion, a load- A sidewall, a sidewall, and a steel belt and a cap ply for preventing separation of the tread portion and the carcass and alleviating the road surface impact, are generally used .

The body ply has a plurality of body plies as needed to reinforce the bead parts to withstand the acceleration, acceleration and cornering, such as a racing tire. Generally, a bias type racing tire is provided with three bias body ply layers and one bias chaser.

The body ply and the chaser are arranged in a row of a plurality of nylon cords, and the rubber is rolled to form a ply.

However, in the conventional bias type racing tire as described above, the weight and cost of the tire are increased due to the application of the three body fly layers, and there are restrictions when manufacturing a lighter weight tire. In addition, there is a problem that the body-ply interlaminar adhesive force is reduced by a large number of body fly layers on the inner side of the tread portion, thereby reducing the contact force with the road surface.

Therefore, there is a growing need for development of tire technology that can be lightened, light weighted, improved in acceleration performance, and handling performance comparable or superior to that of the prior art, compared with the prior art.

[Patent Document 1] Korean Patent Application Publication No. 10-2005-0058208 (entitled "Cured tire manufacturing module")

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a motorcycle which is lightweight, lightweight, Radial type racing tire double chaser structure having high performance.

In addition, the present invention is based on the fact that, in a conventional bias type racing tire in which three body ply layers and one chifer layer are applied, one body ply layer and two chiper layers are applied to minimize the use of the body ply layer, A radial type racing tire having the same structure as that of a conventional sidewall, in which rigidity is maintained and weight is reduced.

According to an aspect of the present invention, there is provided a double chaser structure of a radial type racing tire, comprising: a bead portion having a body ply surrounding an outer surface of a bead core; And a first chaser and a second chaser disposed between the body ply and the bead, wherein the body ply and the chaser are formed by arranging a plurality of nylon cords in a row and rolling the rubber, The nylon cord of the first chaser and the second chaser may intersect each other with respect to the nylon cord of the body fly.

In addition, the nylon cord of the body ply may be arranged at right angles to the circumferential direction of the tire.

Further, the nylon cord direction of any one of the first chaser and the second chaser is +45 degrees to -45 degrees with respect to the nylon cord direction of the body ply, and the other of the first chaser and the second chaser One nylon cord direction may be -45 degrees to +45 degrees with respect to the nylon cord direction of the body ply.

In addition, the crossing angle of the nylon cord of the first chaser and the second chaser crossing each other may be 80 to 110 degrees.

The body ply may surround the bead through a sidewall in the tread portion, and the body fly end may be formed to contact or overlap the end of the steel belt.

The first chaser may include a first chaser inner edge and a first chaser outer edge, and the second chaser may include a second chaser inner edge and a second chaser outer edge, The height of the inner end of the one-chaser can be higher than the height of the outer end of the second chaser.

The height of the outer end of the second chaser may be higher than the height of the inner end of the second chaser.

The height of the inner end of the second chucker may be higher than the height of the outer end of the first chucker.

In addition, the height of the body fly end may be higher than the height of the inner end of the first chucker.

According to the radial type racing tire double chaser structure according to the embodiment of the present invention, by using one body fly layer and two chaser layers, it is possible to minimize the use of the body fly layer compared to the prior art, .

In addition, according to the double chaser structure of the radial type racing tire according to the embodiment of the present invention, the body ply has only one layer, but the rigidity of the side wall is equal to or the same as that of the prior art through the double chaser structure can do.

In addition, according to the radial type racing tire double chaser structure according to the embodiment of the present invention, the bead core is reinforced by the first chaser, the second chaser and the body fly to reinforce the bead portion, It is possible to considerably reduce the bead torsion caused by the beads.

Further, according to the radial type racing tire double chaser structure according to the embodiment of the present invention, the first chaser inner edge, the first chaser outer edge, the second chaser inner edge, the second chaser inner edge, The outer end of the chaser and the end of the body fly are alternately stacked in the height direction, and the stiffness is gradually reduced from the center of the tire toward the radially outer side, so that stress, external force and torsion can be dispersed.

1 is a cross-sectional view showing a bias type racing tire chaser structure according to the prior art.
2 is a cross-sectional view showing a radial type racing tire double chaser structure according to an embodiment of the present invention.
3 is a perspective view showing a radial type racing tire double chaser structure according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as possible whenever possible. In the following description, specific details are set forth to provide a better understanding of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, have. In addition, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the present invention. Therefore, the terms used in the present specification should be defined based on the meaning of the terms, not on the names of simple terms, and on the contents throughout the specification.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, without departing from the scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

An embodiment of the present invention to be described below is an invention relating to a racing tire, particularly to a radial type racing tire in which the durability of the bead portion is improved by doubly reinforcing a chaser between the body ply and the bead portion.

FIG. 1 is a cross-sectional view of a bias tire single chaser structure according to the prior art, and FIGS. 2 and 3 are cross-sectional views illustrating a radial type racing tire double chaser structure according to the present invention.

Referring to FIG. 1, a conventional bias tire single chaser structure includes a bead portion 30 formed of a bead core, a bead portion 30 formed to surround the bead portion 30 through a sidewall 40 in a tread portion 50 Three body plies 10a, 10b and 10c and one chaper 21 between the bead 30 and the body ply 10 are formed in a layered manner.

However, the conventional bias tire constructed as shown in FIG. 1 has a problem that the weight of the tire and the manufacturing cost are increased because the three body ply 10 layers are applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 are views showing a radial type racing tire having one layer of body ply 10 and two layers of chippers in accordance with an embodiment of the present invention.

2 and 3, a radial type racing tire double chaser structure according to an embodiment of the present invention includes a body ply 10 having a bead portion (not shown) which surrounds an outer surface of a bead core 33 30 may include a first chaser 21 and a second chaser 22 between the body ply 10 and the bead 30.

The body ply 10 and the chispers 21 and 22 are formed by arranging a plurality of nylon cords in a row and rolling a rubber (not shown), wherein the first chaser 21 and the second chaser 22 are configured to intersect with each other with respect to the nylon cord of the body ply 10.

The nylon cord of the body ply 10 is arranged at right angles to the circumferential direction of the tire and the direction of the nylon cord of either the first chaser 21 or the second chaser 22 is perpendicular to the circumferential direction of the body ply 10, The direction of the nylon cord of the other one of the first chaser 21 and the second chaser 22 is about +45 degrees to -45 degrees with respect to the direction of the nylon cord of the body ply 10, -45 degrees to +45 degrees.

Further, the nodal crossing angles of the first chopper 21 and the second chopper 22 intersecting each other are 80 degrees to 110 degrees. For example, when the crossing angle is less than 80 degrees or the crossing angle is more than 110 degrees, the rigidity of the body ply 10 and the chippers 21, 22 may be lowered, This may cause separation problems.

The body ply 10 surrounds the bead portion 30 through the sidewall 40 in the tread portion 50 and the body fly end 11 is attached to the ends of the steel belt 61 and the cap ply 60 As shown in Fig. This reinforces the rigidity of the side wall by extending the body fly end 11 to the vicinity of the boundary between the tread portion and the sidewall to form two layers while using one body ply.

The first chaser 21 includes a first chaser inner end 21a and a first chaser outer end 21b and the second chaser 22 has a second chaser inner end 22a, And a second chaser outer end 22b, wherein the height of the first chaser inner end 21a is higher than the height of the second chaser outer end 22b.

The height of the second chaser outer end 22b is higher than the height of the second chaser inner end 22a and the height of the second chaser inner end 22a is greater than the height of the first chaser outer end 21b And the height of the body fly end 11 is higher than the height of the first chaser inner end 21a.

As described above, the first chaser inner side end 21a, the first chaser outer side end 21b, the second chaser inner side end 22a, the second chaser outer side 21b, The end 22b and the body fly end 11 are alternately stacked along the height so that the stiffness gradually decreases from the center of the tire toward the outside in the radial direction to disperse the stress, external force and torsion.

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It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention something to do.

10: segment 21: first chaser
21a: Inner end of the first chaser 21b: Outer end of the first chaser
22: second chaser 22a: second chaser inner end
22b: second chaser outer end 30: bead portion
31: bead filler 32: inner liner
33: Bead core 40: Sidewall
60: cap fly 61: steel belt

Claims (9)

A radial type racing tire double chaser structure, comprising: a bead portion (30) having a body ply (10) surrounding an outer surface of a bead core (33); And a first chaser (21) and a second chaser (22) disposed between the body ply (10) and the bead portion (30), wherein the body ply (10) The nylon cords of the body ply 10 are arranged at right angles to the circumferential direction of the tire, and the nylon cords of the body ply 10 are arranged at right angles to each other, The nylon cords of the first chaser 21 and the second chaser 22 are arranged to intersect with each other with respect to the nylon cord of the body ply 10 and the first chaser 21 and the second chaser 22, One nylon cord direction is +45 degrees to -45 degrees with respect to the nylon cord direction of the body ply 10 and the other nylon cord direction of the first chaser 21 and the second chaser 22 Is -45 degrees to +45 degrees with respect to the nylon cord direction of the body ply (10), and the first chaser 21 And nylon cord crossing angles of the second chaser 22 intersect between 80 and 110 degrees and the body ply 10 surrounds the bead portion 30 from the tread portion 50 through the sidewall 40 The body ply end 11 of the body ply 10 extends to abut the ends of the steel belt 61 and the cap ply 60 and the first chucker 21 is connected to the first chaser inner end 21a ) And a first chaser outer end (21b), said second chaser (22) comprising radial type racing comprising a second chaser inner end (22a) and a second chaser outer end (22b) In a tire double chaser structure,
The height of the inner end 21a of the first chaser, which gradually reduces the stiffness toward the radially outer side from the center of the tire so as to disperse stress, external force and torsion,
Is formed to be higher than the height of the outer end 22b of the second chucker,
The height of the outer end 22b of the second chaser,
Is higher than the height of the inner end 22a of the second chaser,
Wherein the first chaser inner side end 21a, the first chaser outer side end 21b, the second chaser inner side end 22a, the second chaser inner side end 21b, (22b) and the body fly end (11) are alternately stacked in accordance with a height. The radial type racing double chaser structure according to claim 1, delete delete delete delete delete delete delete delete

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