KR20220070879A - Tire - Google Patents

Abstract

The present invention discloses a tire. The present invention comprises: a tread unit; a side wall unit formed and extended from an end of the tread unit; a bead unit which is disposed on an end of the side wall unit, and has a bead core and a bead filler; a belt layer extended in a width direction of the tire inside the tread unit; and a carcass which is extended along the tread unit, the side wall unit, and the bead unit to an inside of the belt layer, turned up at the bead core, and turned at a peak of the bead filler. The tire has improved safety and durability.

Description

tire

Embodiments of the present invention relate to tires.

A vehicle driven by users consists of many parts, and among them, a tire substantially affects the driving of the vehicle, and in particular, it can be said to be one of the key parts for securing the safety of the user.

The bead part of the tire is responsible for fixing the rim and tire so that they do not separate when the vehicle is driving. During high-speed driving, the tire generates heat and repeats the flexing/extending motion. Accordingly, the contact surface of the tire bead and the rim flows. Such a change in the contact surface between the bead part and the rim of the tire may cause a change in the performance of the vehicle's maneuverability and stability during high-speed driving, resulting in rapid deterioration of the performance, and may lead to a major accident if the bead escapes.

In addition, as the deformation of the sidewall portion increases and the size of the standing wave increases, the high-speed durability performance is deteriorated. In order to solve this problem and improve the rim mountability, methods of changing the bead shape of the tire or changing the material of the rim cushion have been proposed, but the existing structures do not provide satisfactory performance. And in order to improve stability, there is a demand for the development of a tire with improved rim mountability and reduced fluidity.

The above-mentioned background art is technical information that the inventor possessed for the derivation of the present invention or acquired in the process of derivation of the present invention, and cannot necessarily be said to be a known technique disclosed to the general public prior to the filing of the present invention.

Embodiments of the present invention provide a tire with improved safety and durability.

One aspect of the present invention includes a tread portion, a sidewall portion extending from an end of the tread portion, a bead portion disposed at an end of the sidewall portion, and having a bead core and a bead filler, and the tread portion inside the A belt layer extending in the width direction of the tire, and a carcass extending along the tread portion, the sidewall portion, and the bead portion to the inside of the belt layer, turned up at the bead core, and turned at the peak end of the bead filler It provides a tire comprising a.

In addition, the end of the carcass may be turned at the peak end of the bead filler to be disposed between the carcass and the bead filler.

In addition, in the carcass, the end point of the carcass may be disposed at one point inside the bead pillar.

In addition, the carcass may be disposed to overlap the inside of the bead pillar from the peak end of the bead pillar to a preset section.

In addition, it may further include a bonding member disposed between the bead filler and the carcass.

Also, the bonding member may have a thickness smaller than a thickness of the carcass.

In addition, the bonding member may be disposed between the overlapping carcass.

In addition, the carcass may further include a fixing member disposed in the turned area at the peak end.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

In the tire according to the present invention, since the end of the carcass is inserted into the bead, the carcass and the bead are firmly coupled. Since the end of the carcass is disposed to be inserted into the other section (the first section) of the bead filler and the carcass, it is not separated by an external force, so the position of the bead is firmly maintained, and even if a strong impact is applied to the tire while driving, the bead The negative separation can be prevented.

In the tire according to the present invention, since the end of the carcass is turned at the peak end (PK) of the bead, the degree of freedom in design can be increased. Since the fifth section does not extend along the sidewall portion, interference with other semi-finished products is minimized, so that the efficiency of the manufacturing process can be increased.

1 is a perspective view showing a tire according to an embodiment of the present invention by cutting it.
FIG. 2 is a cross-sectional view taken along the line ?-| of FIG. 1. FIG.
FIG. 3 is an enlarged cross-sectional view of the bead part of FIG. 2 .
4 and 5 are enlarged views of a part of FIG. 3 .
6 is a view showing a part of a tire according to another embodiment of the present invention.
7 is a view showing a part of a tire according to still another embodiment of the present invention.
8 is a view showing a part of a tire according to still another embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following embodiments, terms such as first, second, etc. are used for the purpose of distinguishing one component from other components without limiting the meaning.

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility that one or more other features or components may be added is not excluded in advance.

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

Hereinafter, a tire 100 according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cutaway perspective view of a tire 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the ?-|

1 and 2 , the tire 100 includes a tread unit 110 and a sidewall unit 120 extending from an end of the tread unit 110 , and a bead unit provided at an end of the sidewall unit 120 . 130) may be included.

The tire 100 may include the carcass 140 and the belt layer 150 positioned below the tread part 110 , and a cap ply 160 may be further included on the belt layer 150 . . Also, the tire 100 may include an inner liner 170 positioned inside the tread unit 110 and the pair of sidewall units 120 to maintain the internal air pressure of the tire 100 .

The tread unit 110 may have a tread block TB partitioned by a plurality of grooves 115 . The tread block TB is a portion in contact with the ground when the vehicle is driven, and may be partitioned by a first groove circumferentially in the radial direction of the tire 100 and a second groove formed in a transverse direction of the tire 100 . have. The tread 110 is made of a thick rubber layer and transmits the driving force and braking force of the vehicle to the ground.

On the surface of the tread block TB, tread patterns for steering safety, traction, and braking performance and blocks partitioned by the tread patterns may be located. The tread patterns may include a plurality of grooves for drainage when driving on a wet road surface and sipes for improving traction and braking force. The sipe is formed in the block, and may be a groove having a size smaller than that of the groove. The sipe serves to break the water film by absorbing moisture when driving on a wet road surface, thereby increasing the driving force and braking force of the tire 100 .

The tread 110 may include a carcass 140 , a belt layer 150 , a cap ply 160 , and an inner liner 170 therein.

The carcass 140 extends along the tread part 110 , the sidewall part 120 , and the bead part 130 to form a skeleton of the tire 100 . The carcass 140 may have a structure in which a tire cord is included in a predetermined rubber component.

Since the carcass 140 is turned up in the bead part 130 , an inner space surrounded by the carcass 140 may be created, and the bead core 131 and the bead filler 132 are disposed in the inner space.

The carcass 140 may be formed by overlapping a plurality of cord papers made of a high-strength fiber organic material such as steel, polyester, rayon, or the like, and then coating it with rubber and rolling it.

Specifically, the carcass 140 includes one or more rubber components selected from the group consisting of synthetic rubber and natural rubber, and may include at least one or more tire cords. As the tire cord, various natural fibers or rayon, nylon, polyester, and Kevlar may be used, and a steel cord formed by twisting a plurality of thin wires may also be used.

The belt layer 150 extends inside the tread portion in the width direction of the tire 100 . The belt layer 150 may improve durability of the tire 100 and form a skeleton. In addition, the belt layer 150 serves to secure driving stability by not only mitigating external impact, but also maintaining a wide tread of the tread. The belt layer 150 may be disposed below the tread 110 and may be formed by rolling by covering a plurality of belt cords (not shown) made of steel or organic fiber with rubber.

A plurality of belt layers 150 may be provided. For example, the first belt layer 151 disposed on the upper surface of the inner liner 170 and the second belt layer 152 disposed on the upper surface of the first belt layer 151 may be provided.

The cap ply 160 is disposed between the tread 110 and the belt layer 150 . The cap ply 160 is a special cord paper attached on the belt layer 150 to improve performance during driving. The cap ply 160 may include, for example, polyester synthetic fibers. The cap ply 160 is supported by the belt layer 150 and the carcass 140, thereby minimizing the movement of the belt layer 150 during driving to ensure driving stability.

The inner liner 170 may be disposed inside the tire 100 to prevent air leakage and maintain air pressure in the tire 100 . The inner liner 170 may be formed of a rubber layer having excellent sealing properties. For example, the inner liner 170 may be made of butyl rubber having a high density.

The inner liner 170 may be disposed inside the carcass 140 and extend to the bead part 130 . The inner liner 170 may contact one surface of the carcass 140 , and both ends may contact the bead part 130 .

FIG. 3 is an enlarged cross-sectional view of the bead part 130 of FIG. 2 .

Referring to FIG. 3 , the bead part 130 is provided at the end of the sidewall part 120 and serves to mount the tire 100 on the rim.

The bead part 130 may include a bead core 131 formed by twisting a plurality of rubber-coated steel wires. The bead core 131 may be formed by grouping a plurality of bead wires (C). The bead core 131 may be disposed adjacent to the bead filler 132 . Preferably, the bead core 131 may be disposed below the bead filler 132 .

The bead part 130 may include a bead filler 132 , and the bead filler 132 may be disposed to extend from the bead core 131 in the sidewall part 120 direction. The bead filler 132 is a rubber filler attached to one side of the bead core 131 , and serves to reinforce the bead core 131 . In another embodiment, a plurality of bead fillers 132 may have different physical properties.

4 and 5 are enlarged views of a part of FIG. 3 .

3 to 5 , the carcass 140 extends inside the belt layer 150 along the tread 110 , the sidewall part 120 , and the bead part 130 .

In one embodiment, the carcass 140 may be divided into a plurality of sections. The first section 141 extends along the tread part 110 and the sidewall part 120 , and extends along the inner side of the bead part 130 . The second section 142 is connected to the first section 141 and turned up in the bead core 131 . The third section 143 is connected to the second section 142 and extends along the outside of the bead part 130 . The fourth section 144 is connected to the third section 143 and is turned at the peak end PK of the bead pillar 132 . The fifth section 145 is connected in the fourth section 144 , and is disposed to be inserted into the first section 141 and the bead part 130 .

In this case, the third section 143 and the fifth section 145 are disposed to face each other, and may be in contact with each other. The third section 143 and the fifth section 145 may directly contact each other by a predetermined distance D from the peak end PK of the bead pillar 132 . Since the third section 143 and the fifth section 145 of the carcass 140 are directly connected, the carcass 140 can be firmly fixed to the outside of the bead part 130 . In particular, since the carcass 140 is firmly covered on the peak end PK of the bead filler 132 and the fifth section 145 is inserted into the bead filler 132 , the bead portion 130 of Separation can be prevented.

The carcass 140 is turned up at the bead core 131 , and is turned at the peak end PK of the bead pillar 132 . The end of the carcass 140 is turned at the peak end PK of the bead filler 132 , and may be disposed between the carcass 140 and the bead filler 132 .

The end point 145EP of the carcass 140 may be disposed at a predetermined point inside the bead pillar 132 . The end point 145EP of the carcass 140 does not extend to the bead core 131 , but extends along the inside of the bead pillar 132 . In this case, the end point 145EP is disposed adjacent to the boundary region between the bead core 131 and the bead filler 132 .

The end of the carcass 140 may be reduced in thickness up to the end point 145EP. In the fifth section 145 , the end may have a reduced thickness up to the end point 145EP. Since the thickness of the end point 145EP is reduced, the first section 141 and the inner liner 170 may extend smoothly. In particular, the inner liner 170 is disposed along the inner surface of the tire 100 and extends inward from the bead portion 130 at the first point P1, and the inner liner 170 is gently moved inward. can be extended

The carcass 140 may be disposed to overlap the inside of the bead pillar 132 from the peak end PK of the bead pillar 132 to a preset section. Referring to FIG. 3 , in the carcass 140 , since the fifth section 145 is inserted between the first section 141 and the bead pillar 132 , the first section 141 and the fifth section 145 are mutually They overlap to form an overlapping section OL.

The first section 141 and the fifth section 145 have the same physical properties, and since the carcass 140 having the same physical properties overlap each other, they can be firmly attached to the bead part 130 . When the first section 141 and the fifth section 145 overlap each other, the thickness of the carcass 140 is increased on the inside of the bead section 130 , so that the bead section 130 has increased rigidity on the inside. can

The bead filler 132 has the strongest strength in the tire 100, and since the fifth section 145 is disposed inside the bead filler 132, the fifth section 145 can be protected from an impact transmitted from the outside. have. Accordingly, it is possible to prevent the carcass 140 from being separated by an external impact.

In a conventional tire, after the carcass is turned up at the bead portion, the end of the carcass is disposed on the sidewall of the sidewall. When the end of the carcass is disposed on the sidewall portion, the end of the carcass is greatly affected by the external environment. In particular, when a strong impact is transmitted from the outside, the end of the carcass may be separated from the sidewall portion, and the bead portion may be separated. In addition, in the conventional tire, since the end of the carcass extends to a considerable length and is attached to the sidewall portion, the degree of freedom in design is reduced. Since the end of the carcass affects the placement of other semi-finished products, the design of the tire becomes complicated.

In the tire 100 according to the present invention, since the end of the carcass 140 is inserted into the bead part 130 , the carcass 140 and the bead part 130 are firmly coupled. Since the end of the carcass 140 is disposed to be inserted into another section (the first section) of the bead pillar 132 and the carcass 140 , it is not separated by an external force, so that the position of the bead part 130 is firmly It is maintained, and even if a strong impact is applied to the tire 100 while driving, the separation of the bead part 130 can be prevented.

In the tire 100 according to the present invention, since the end of the carcass 140 is turned at the peak end PK of the bead portion 130, the degree of freedom in design can be increased. Since the fifth section 145 does not extend along the sidewall part 120 , interference with other semi-finished products is minimized, so that the efficiency of the manufacturing process can be increased.

6 is a view showing a part of a tire according to another embodiment of the present invention.

Referring to FIG. 6 , the carcass 140 may be attached to the bead pillar 132 by the bonding member 180 . The bonding member 180 may be disposed between the bead pillar 132 and the carcass 140 .

The bonding member 180 may fix the bead pillar 132 and the carcass 140 . In addition, the bonding member 180 may prevent the carcass 140 from being separated from the bead filler 132 by buffering a difference in physical properties between the bead filler 132 and the carcass 140 .

In an embodiment, the bonding member 180 may be formed to be thinner than the thickness of the carcass 140 . The bonding member 180 may be coated, applied, or attached to at least one of the carcass 140 and the bead filler 132 .

In another embodiment, the bonding member 180 may be formed of a ply strip. The fly strip is formed of a rubber material, and may be disposed to cover the bead portion 130 .

In the tire 100 according to the embodiment of the present invention, the bonding member 180 is disposed between the bead part 130 and the carcass 140 , so that the difference in physical properties between the bead filler 132 and the carcass 140 is buffered. Thus, the carcass 140 can be firmly fixed to the bead part 130 .

7 is a view showing a part of a tire according to still another embodiment of the present invention.

Referring to FIG. 7 , the carcass 140 may include a first bonding member 180A and a second bonding member 180B.

The first bonding member 180A covers the bead part 130 and is disposed between the bead part 130 and the carcass 140 . The first bonding member 180A cushions a difference in physical properties between the bead filler 132 and the carcass 140 , so that the carcass 140 may be firmly fixed to the bead part 130 .

The second bonding member 180B connects the overlapping carcass 140 to each other, so that the end of the carcass 140 can be firmly fixed. Since the second bonding member 180B is disposed, the second bonding member 180B may strongly connect the first section 141 and the fifth section 145 .

The tire 100 according to the embodiment of the present invention may firmly fix the end of the carcass 140 turned at the peak end PK of the bead part 130 . The first bonding member 180A increases the fixing force between the fifth section 145 and the bead filler 132 , and the second bonding member 180B increases the fixing force between the fifth section 145 and the first section 141 . . Since the fifth section 145 of the carcass 140 is fixed by the first bonding member 180A and the second bonding member 180B, it is not separated from the inside of the bead part 130 .

8 is a view showing a part of a tire according to still another embodiment of the present invention.

Referring to FIG. 8 , the fixing member 140F may be disposed at the peak end PK of the bead part 130 . The fixing member 140F may be disposed in a region turned from the peak end of the carcass 140 .

Since the carcass 140 is turned at the peak end PK of the bead pillar 132 , the fourth section 144 and the first section 141 may be separated. Since the fixing member 140F is disposed to cover at least a portion of the first section 141 and the fourth section 144 that are turned, it is possible to prevent the fourth section 144 from being separated from the first section 141 . have.

In the tire 100 according to the embodiment of the present invention, since the fixing member 140F is disposed at the portion where the carcass 140 is turned at the peak end PK of the bead filler 132 , the turning of the carcass 140 . It is possible to prevent the separated parts from being separated.

As such, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and those of ordinary skill in the art will understand that various modifications and variations of the embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: tire
110: tread part
120 side wall
130: bead unit
140: carcass

Claims (8)

tread;
a sidewall portion extending from an end of the tread portion;
a bead portion disposed at an end of the sidewall portion, the bead portion having a bead core and a bead filler;
a belt layer extending in the width direction of the tire inside the tread part; and
A carcass extending along the tread portion, the sidewall portion, and the bead portion to the inside of the belt layer, turned up at the bead core, and turned at the peak end of the bead filler; and a tire. According to claim 1,
The carcass
an end turned at the peak end of the bead pillar and disposed between the carcass and the bead pillar. According to claim 1,
The carcass
The end of the carcass is
and an endpoint is disposed at a point on the inside of the bead pillar. According to claim 1,
The carcass
The tire is disposed to overlap the inside of the bead filler from the peak end of the bead filler to a preset section. According to claim 1,
The tire further comprising a; a bonding member disposed between the bead filler and the carcass. 6. The method of claim 5,
The bonding member is
A tire having a thickness smaller than the thickness of the carcass. 6. The method of claim 5,
The bonding member is
A tire disposed between the overlapping carcass. According to claim 1,
The tire further comprising; a fixing member disposed in a region where the carcass is turned at the peak end.

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