KR101662196B1

KR101662196B1 - Pneumatic tire

Info

Publication number: KR101662196B1
Application number: KR1020150061986A
Authority: KR
Inventors: 김요환
Original assignee: 금호타이어 주식회사
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2016-10-04

Abstract

The present invention relates to pneumatic tires.
Wherein the pneumatic tire comprises a tread directly contacting the road surface, a bead coupled to the rim, a body ply wrapped around the bead to form the skeleton of the tire, and a belt disposed between the body ply and the tread, May be extended to enclose the ends of the belt.

Description

{PNEUMATIC TIRE}

The present invention relates to pneumatic tires.

Generally, the pneumatic tire includes a supporting function for supporting the entire load of the vehicle, a power transmission function for transmitting the driving force and the braking force of the vehicle to the road surface, a shock absorbing function for alleviating the external impact caused by the irregular road surface, And a position switching function for switching the position according to the position.

Fig. 5 is a cutaway perspective view showing a conventional pneumatic tire partially cut.

For example, as shown in FIG. 5, the conventional pneumatic tire includes a tread 1 that is in direct contact with the road surface, a bead 2 that is coupled to the rim, and a bead 2 that turns up the bead 2, An inner liner 4 positioned inside the body ply 3 so as to prevent air from leaking therein and a tread 1 and a bead 2 so as to enable the tread motion of the tire, A side wall 5 connecting the tread 1 and the body ply 3 and at least one belt Belt 6 installed between the tread 1 and the body ply 3.

Particularly, the pneumatic tire is divided into a primary molding and a secondary molding. In the primary molding of the pneumatic tire, the attachment of the body ply and the side well is completed, starting from the inner liner. In the secondary molding, The molding of the tread is completed. In this case, the case molded in the first order is referred to as a first case, and the case molded in the second order is referred to as a second case.

However, in this conventional technique, the tread is simply attached to the first case after the vulcanization without any structural connection between the primary molding in which the body ply and the sidewall are installed and the secondary molding in which the belt and the tread are installed, At this time, belt edge separation may occur at the belt end having a relatively high rigidity, and there is no structural connection between the primary case and the secondary case, so that the entire rigidity of the case may be deteriorated.

Korean Registered Utility Model No. 0388349 (2005. 06. 21. Announcement)

Embodiments of the present invention seek to provide a pneumatic tire that can improve overall stiffness of a tire.

According to an aspect of the invention, there is provided a tread comprising: a tread directly contacting a road surface; Beads bonded to the rim; A body ply covering the bead to form a skeleton of the tire; And a belt disposed between the body ply and the tread, wherein an end of the body ply may extend to enclose an end of the belt.

At this time, the body ply includes a main ply portion; A first ply portion extending downward from an end of the main ply portion to cover an end bottom surface of the belt; And a second ply portion extending upwardly at an end of the main ply portion to cover an upper surface of the end portion of the belt.

The body ply may further include: a first cord having an end covering an end surface of the belt; And a second cord, the end of which covers the upper surface of the end of the belt.

The first ply covers the bottom surface of the belt so that the first ply is spaced apart from the bottom surface of the belt and the second ply covers the top surface of the belt so that the second ply is spaced from the top surface of the end of the belt. have.

Further, the first code and the second code may be arranged alternately so as to be staggeredly divided at the end portion.

The first code and the second code may be composed of at least one selected from the group consisting of aramid, nylon, polyester, Rayon, and Lyocell.

Further, the belt includes a first belt; And a second belt that is spaced apart from the first belt to prevent stress concentration.

The effect of the pneumatic tire according to the present invention will be described as follows.

According to the embodiments, the rigidity of the entire tire can be improved through the structure in which the end portion of the body ply covers the end portion of the belt, and as a result, the running performance of the tire can be improved.

Further, according to the present embodiments, there is an effect that the separation caused at the end of the belt can be prevented by strengthening the restraining force on the belt by using the body ply.

1 is a cross-sectional view of a pneumatic tire according to an embodiment of the present invention.
Fig. 2 is an enlarged view showing a portion "A" in Fig.
3 is a cut-away perspective view of a pneumatic tire according to an embodiment of the present invention.
4 is an enlarged perspective view of an end portion of a body play according to an embodiment of the present invention.
Fig. 5 is a cutaway perspective view showing a conventional pneumatic tire partially cut.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Fig. 1 is a cross-sectional view of a pneumatic tire according to an embodiment of the present invention, Fig. 2 is an enlarged view of the portion "A" Is a cutaway perspective view showing the tire partially cut.

1 to 3, the pneumatic tire 10 according to the embodiment of the present invention is configured such that the end of the belt 400 is wrapped by the end of the body ply 300, It is possible to increase the rigidity.

The pneumatic tire 10 includes a tread 100 directly contacting the road surface, a bead 200 engageable with the rim, a body ply 300 extending to surround the end of the belt 400, A belt 400 disposed between the tread 100 and the body ply 300, an inner liner 510 positioned inside the body ply 300, a tread 100 and a bead 200, as shown in FIG.

The structure of the tread 100, the bead 200, the inner liner 510 and the sidewall 520 is similar to that of the tread 100, the bead 200, the inner liner 510, And the side wall 520, detailed description thereof will be omitted.

The body ply 300 is a part constituting the skeleton of the tire and is formed by pressing the rubber to a cord coated with an adhesive (for example, a first cord 301 and a second cord 302 to be described later) It can be cut and used at an angle. In the present embodiment, the body ply 300 is composed of a single ply made of a single layer of cord, but it is not limited to this, and it goes without saying that the body ply 300 can be suitably used for tire demanding characteristics such as single, semi single or two ply.

The body ply 300 may include an end extending to surround the end of the belt 400, forming the overall skeleton of the tire.

4 is an enlarged perspective view of an end portion of a body play according to an embodiment of the present invention.

4, the body ply 300 includes a main ply portion 310 positioned between the tread 100 and the inner liner 510 to turn up and wrap the bead 200, A first ply portion 320 extending downward from the belt 400 so as to cover a bottom surface of the belt 400 at an end of the main ply 310; And a second ply 330 extending upwardly of the belt 400 to cover the belt 400.

The first ply portion 320 covers the bottom surface of the belt 400 and the second ply portion 330 covers the upper surface of the end portion of the belt 400, Therefore, it is possible to prevent the separation of the entire tire and improve the rigidity of the entire tire.

The main ply portion 310, the first ply portion 320 and the second ply portion 330 may be composed of at least a first code 301 and a second code 302. For example, the main ply portion 310 may include a plurality of first ply portions 301 and second ply portions 302 alternately arranged, and the first ply portion 320 may include a main ply portion 310, Only the first code 301 among the first code 301 and the second code 302 of the main ply portion 310 may be configured to extend from the end of the main ply portion 310, Only the second code 302 out of the first code 301 and the second code 302 of the main ply 310 may be configured to extend from the end of the main ply 310.

In this embodiment, the first code 301 and the second code 302 may be any one selected from the group consisting of Aramid, Nylon, Polyester, Rayon, and Lyocell The first code 301 and the second code 302 may be made of different materials selected from the group consisting of aramid, nylon, polyester, rayon, and lyocell.

Particularly, the first ply 320 and the second ply 330 may be formed in such a manner that the first cord 301 and the second cord 302 of the main ply 310 are staggered from each other, The ends of the belt 400 can be wrapped in a balanced manner as a whole.

For example, when the body ply 300 is composed of 20 nylon strands, the first ply portion 320 is divided into 10 nylon strands (first cord 301) at the end of the main ply portion 310, The second ply portion 330 is divided into 10 nylon strands (second cord 302) at the end of the main ply portion 310 and each divided nylon 10 strand (first cord 301, 302) may alternately be positioned on the upper and lower surfaces of the belt 400. [

The belt 400 may be disposed between the body ply 300 and the tread 100. The belt 400 can mitigate the impact from the outside when traveling and prevent the cracks or the external contraction of the tread 100 from directly reaching the body ply 300 and prevent separation of the rubber layer and the body ply 300 have. The belt 400 can act as a strong reinforcing bar placed circumferentially between the tread 100 and the body ply 300 and can tighten the body ply 300 to increase the rigidity of the tread 100.

The belt 400 may include a first belt 410 positioned on the body ply 300 side and a second belt 420 positioned on the tread 100 side. The first belt 410 and the second belt 420 may be maintained at a constant interval (for example, about 5 to 10 mm) to prevent stress concentration. The first belt 410 and the second belt 420 maintain the first ply 320 and the second ply 330 at regular intervals (for example, about 5 to 10 mm) Stress concentration can be avoided.

As described above, according to the present invention, the rigidity of the entire tire can be improved through the structure in which the end portion of the body ply covers the end portion of the belt, the running performance of the tire can be improved, So that the separation force generated at the end portion of the belt can be prevented.

Although the pneumatic tire according to the embodiment of the present invention has been described above as a specific embodiment, the present invention is not limited thereto, and the present invention is not limited thereto, and should be construed as having the widest range according to the basic idea disclosed in this specification do. Skilled artisans may implement a pattern of features that are not described in a combinatorial and / or permutational manner with the disclosed embodiments, but this is not to depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

100: Tread 200: Bead
300: Body fly 310: Body fly
301: first code 302: second code
310: main fly portion 320: first fly portion
330: second ply part 400: belt
410: first belt 420: second belt
510: Inner Liner 520: Sidewall

Claims

A tread directly contacting the road surface;
Beads bonded to the rim;
A body ply covering the bead to form a skeleton of the tire; And
And a belt disposed between the body ply and the tread, wherein an end of the body ply extends to enclose an end of the belt,
The body ply includes a main ply portion positioned between the tread and the inner liner and surrounding the bead in a turn-up manner, and a first ply portion extending downwardly from the end portion of the main ply portion, And a second ply portion extending upwardly of the belt to cover an upper end surface of the belt at an end of the main ply portion,
Wherein the first ply portion extends only at an end portion of the main ply portion, and the second ply portion is formed such that only the second ply portion is extended from the main ply portion to the main ply portion, Wherein the first cord and the second cord are divided in the upper and lower directions of the belt so as to be offset from each other.

delete

The method according to claim 1,
The first code and the second code are
A pneumatic tire comprising at least one selected from the group consisting of Aramid, Nylon, Polyester, Rayon, and Lyocell.

The method according to claim 1,
The belt
A first belt; And
And a second belt spaced apart from the first belt so as to prevent stress concentration.