KR102254474B1 - Pneumatic tire having reinforcing member - Google Patents

Abstract

The present invention relates to a pneumatic tire having a reinforcing member, and more particularly, a tread, which is a thick rubber layer in direct contact with the road surface, a sidewall curved to both sides of the tread, and a tire having a rubber hardness to be mounted on the rim of a vehicle. In the pneumatic tire including a bead portion provided to have a difference, the carcass is disposed so as to cross the inside of the tire along the cross-sectional shape of the tire and the lower end is disposed toward the lower end of the bead part, the bead part A bead filler disposed so that the end of the carcass is inserted toward the lower end across the inside, and disposed between the carcass and the bead filler in the inner direction of the tire based on the carcass to reduce the deformation of the bead part. And a reinforcing member including a first reinforcing member and a second reinforcing member disposed between the carcass and the bead filler in the outer direction of the tire based on the carcass to reduce deformation of the bead part.

Description

Pneumatic tire with reinforcing member {PNEUMATIC TIRE HAVING REINFORCING MEMBER}

The present invention relates to a pneumatic tire, and more particularly, to a pneumatic tire having a reinforcing member capable of improving the stiffness of a bead portion through a reinforcing member that reinforces the carcass without a structure for turning up the carcass. .

1 is a cross-sectional view of a bead portion of a conventional general heavy-duty tire.

Referring to FIG. 1, the tire has a tread (1) in direct contact with the road surface, and a reinforcing belt layer (3) located between the tread (1) and the carcass (2) to reduce the impact of the road surface and reinforce the strength of the tire. ), the side walls 4 bent to both sides of the tread 1, the bead core 5 seated on the rim of the vehicle, and the upper and lower bead pillars 6a having a difference in hardness while surrounding the bead core 5 A bead part 7 made of 6b, a carcass 2 that is turned up around the upper and lower bead pillars 6a and 6b, and a steel chaper that is turned up along the outer side of the carcass 2 ( 8), a hump strip 9 and a rim cushion 10 disposed outside the carcass 2 and the steel chaper 8 are provided.

In order to reinforce such conventional tires, the impact of the road surface and the strength of the tire are reinforced through a structure in which a carcass forms a skeleton and a bead core is turned up into a carcass.

Accordingly, in designing a tire in consideration of durability due to the structure in which the carcass is turned up, a problem of having a limited design structure has arisen.

Registered Patent Publication No. 10-0578101 (2006.05.02.)

The technical problem to be achieved by the present invention is to improve the stiffness of the tire by placing a reinforcing member that reinforces the carcass on the bead portion without a structure to turn the carcass up, and by diversifying the arrangement angle of the reinforcing member and the type of the reinforcing member. It is to provide a pneumatic tire having a reinforcing member capable of controlling the stiffness of the tire.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

In order to achieve the above technical problem, the pneumatic tire provided with the reinforcing member according to the present invention includes a tread which is a thick rubber layer in direct contact with the road surface, sidewalls bent on both sides of the tread, a bead core seated on the rim of a vehicle, and the In a pneumatic tire having a reinforcing member including a bead portion made of a bead filler having a difference in rubber hardness while surrounding the bead core, the tire is disposed so as to cross the inside of the tire along the cross-sectional shape of the tire, and the lower end is the The carcass disposed toward the lower end of the bead part, the bead part is a bead filler disposed such that the end of the carcass is inserted toward the lower end across the interior, the carcass as a reference to reduce the deformation of the bead part. The first reinforcing member disposed between the bead pillar and the carcass in the inner direction of the tire and the carcass disposed between the bead pillar and the carcass in the outer direction of the tire based on the carcass to reduce the deformation of the bead portion. It provides a second reinforcing member.

In an embodiment of the present invention, the first reinforcing member and the second reinforcing member may be a code layer configured to include at least one metal, aramid, and nylon.

In an embodiment of the present invention, the first reinforcing member is composed of a steel wire cord made of a metallic material, and the second reinforcing member is composed of an aramid nylon cord composed of aramid and nylon, so that the stiffness of the inner and outer beads are different from each other. It may be to deploy.

In an embodiment of the present invention, the first reinforcing member and the second reinforcing member are arranged to surround the carcass in the inner and outer directions of the tire, and support both sides of the carcass to supplement the rigidity of the carcass. It may be provided so as to.

In an embodiment of the present invention, a carcass cord and a carcass stopping are disposed between the carcass and the bead pillar to improve the rigidity of the bead, and the first and second reinforcing members are the carcassstopping. It may be disposed between the carcass and to complement the rigidity of the carcass.

In an embodiment of the present invention, in the bead filler, a first bead filler is disposed on the inside of the tire based on the carcass of the tire cross section, a second bead filler is disposed on the outside of the tire, and the first bead filler and The second bead filler may be made of rubber materials having different properties.

In an embodiment of the present invention, a first reinforcing member may be disposed between the first bead pillar and the carcass, and a second reinforcing member may be disposed between the second bead pillar and the carcass.

In an embodiment of the present invention, the first reinforcing member and the second reinforcing member may be arranged to have an angle of 0 to 90 degrees with respect to the position of the carcass to control the rigidity of the bead portion.

According to an embodiment of the present invention, in a pneumatic tire having a reinforcing member, a reinforcing member for reinforcing the carcass is disposed on the bead portion without a structure for turning up the carcass to improve the rigidity of the tire, and the arrangement angle and There is an effect of controlling the stiffness of the tire by diversifying the types of reinforcing members.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a cross-sectional view of a conventional conventional pneumatic tire.
2 is a cross-sectional view and a partial enlarged view of a pneumatic tire having a reinforcing member according to an embodiment of the present invention.
3 is a view showing the deformation of the rim according to the speed of a conventional pneumatic tire and a pneumatic tire having a reinforcing member according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, bonded)" with another part, it is not only "directly connected", but also "indirectly connected" with another member in the middle. "Including the case. In addition, when a part "includes" a certain component, this means that other components may be further provided, not excluding other components, unless specifically stated to the contrary.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

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

2 is a cross-sectional view and a partial enlarged view of a pneumatic tire having a reinforcing member according to an embodiment of the present invention.

Referring to FIG. 2, a pneumatic tire 100 having a reinforcing member according to the present invention includes a tread 111, which is a thick rubber layer in direct contact with the road surface, a sidewall 112 curved to both sides of the tread 111, and In a pneumatic tire comprising a bead portion 150 provided to have a difference in rubber hardness to mount the tire to the rim of a vehicle, the tire has a cross-sectional shape of the tire to support a load by the internal skeleton of the tire and to withstand an impact. Accordingly, the carcass 140 and the bead unit 150 are disposed so as to cross the center of the tire, and the end of the carcass 140 is inserted into the inner liner 114, the rim cushion 113, and the sidewall. Bead fillers (151, 152), which are disposed between 112 and provided to maintain energy absorption and rigidity, of the tire based on the carcass (140) to reduce deformation of the bead portion (150). The tire based on the carcass 140 to reduce deformation of the first reinforcing member 155 and the bead part 150 disposed between the bead pillar 151 and the carcass 140 in the inward direction. It includes a second reinforcing member 156 disposed between the bead pillar 152 and the carcass 140 in the outer direction of the.

More specifically, the carcass 140 is disposed to cross the central portion of the tire according to the cross-sectional shape of the tire so as to support the load with the internal skeleton of the tire and withstand the impact.

Therefore, in the tire, since the carcass 140 is disposed at the center of the inside of the tire, it can support a load and withstand an impact.

In addition, the end of the carcass 140 is inserted therein and disposed between the inner liner 114 and the rim cushion 113 and the sidewall 112 so as to absorb energy and maintain the bead fillers 151 and 152 ) Is provided.

More specifically, the bead fillers 151 and 152 are disposed between the inner liner 114 of the tire and the rim cushion 113 and the sidewall 112, and are provided to have a difference in hardness of the rubber from the outside. It absorbs energy and can maintain the stiffness of the tire.

In addition, a first reinforcing member 155 is disposed between the bead pillar 151 and the carcass 140 in the inner direction of the tire based on the carcass 140 to reduce the deformation of the bead portion 150. Is placed.

More specifically, the first reinforcing member 155 reinforces the carcass 140 to reduce the deformation of the bead portion 150 to improve the stiffness of the tire. It is disposed between the bead filler 151 and the carcass 140 in the inner direction of the tire.

In addition, a second reinforcing member 156 is disposed between the bead pillar 152 and the carcass 140 in the outer direction of the tire based on the carcass 140 to reduce the deformation of the bead portion 150. Is placed.

More specifically, the second reinforcing member 156 reinforces the carcass 140 to reduce the deformation of the bead portion 150 to improve the stiffness of the tire. It is disposed between the bead filler 152 in the outer direction of the tire and the carcass 140.

Therefore, by the first reinforcing member 155 and the second reinforcing member 156 reinforcing the carcass 140, deformation of the bead portion 150 can be prevented and the rigidity of the tire can be improved. .

In addition, the carcass 140 has the lower end of the carcass 140 toward the lower end of the bead unit 150 so as to correspond to the shape of the bead unit 150 in the cross-section of the tire. Can be placed across the center of the.

More specifically, the carcass 140 is disposed inside the tire to support the load, and extends from the tread 111 and the sidewall 112 toward the bead 150, and the extended carcass The end of 140 extends toward the end of the bead part 150 and is disposed across the center of the bead part 150 based on the cross-section of the tire.

That is, the carcass 140 is not a structure that is turned up around the bead core like the conventional carcass 140 but is disposed in a shape that crosses the bead portion 150. Therefore, in utilizing the space of the bead part 150, the first reinforcing member 155 and the second reinforcing member 156 reinforce the carcass 140 even though the space can be designed relatively freely compared to the turned-up structure. By doing so, it is possible to prevent deformation by maintaining the rigidity of the bead portion 150.

In addition, the first reinforcing member 155 and the second reinforcing member 156 may be composed of a code layer to include at least one metal, aramid, and nylon.

More specifically, the first reinforcing member 155 and the second reinforcing member 156 are steel wire cord made of a metal material or aramid nylon cord made of aramid or nylon or aramid and nylon (Aramid + Nylon Hybrid Cord). Accordingly, the first reinforcing member 155 and the second reinforcing member 156 may control the stiffness and weight of the tire by installing a steel wire cord or an aramid nylon cord according to the stiffness or weight according to the condition of the tire. .

At this time, the first reinforcing member 155 is disposed on the inside of the tire based on the carcass 140, and the second reinforcing member 156 is disposed on the outside of the tire. It is possible to arrange a wire cord and an aramid nylon cord to reduce the weight, and it is also possible to place an aramid nylon cord on the inside of the tire and a steel wire cord on the outside of the tire depending on the situation.

In addition, a steel belt 130 is installed between the carcass 140 and the tread 111 to maintain the rigidity of the tire, maintaining the shape of the tread at the top of the steel belt 130, and A reinforcing belt 120 is provided to maintain rigidity.

In this case, the structure of the steel wire cord may be the same as the structure of the steel belt 130, and the structure of the aramid nylon cord may be the same as the structure of the reinforcement belt 120.

Therefore, by configuring the structure of a steel wire cord or aramid nylon cord using the structure of the existing steel belt 130 or the reinforcing belt 120, it is possible to reduce the process and cost.

In addition, the first reinforcing member 155 and the second reinforcing member 156 are arranged to surround the carcass 140 in the inner and outer directions of the tire, and support both sides of the carcass 140 to support the carcass 140 It may be provided to complement the rigidity of the casing 140.

More specifically, the first reinforcing member 155 and the second reinforcing member 156 are disposed to face each other in the inner and outer directions of the tire of the carcass 140 based on the cross-section of the tire, and the carcass The first reinforcing member 155 and the second reinforcing member 156 support both sides of the 140 to reinforce the rigidity of the carcass 140.

Accordingly, the pneumatic tire 100 provided with the reinforcing member according to the present invention has the bead portion 150 through the structure of the first reinforcing member 155 and the second reinforcing member 156 for reinforcing the carcass 140. It is possible to prevent deformation of the tire, thereby improving the rigidity of the tire, and because the turned-up structure of the carcass 140 is unnecessary, the design of the bead unit 150 can be freely performed.

In addition, a carcass cord 153 and a carcass stopper 154 are disposed between the carcass 140 and the bead pillar to improve the rigidity of the bead portion 150, and the first reinforcing member 155 And the second reinforcing member 156 is disposed between the carcass 154 and the carcass 140 to supplement the rigidity of the carcass 140.

In more detail, carcass cords 153 are provided on both sides of the carcass 140 for stiffness of the tire, and carcasses 154 topping the carcass cord 153 are provided. .

That is, between the first bead filler 151 and the second bead filler 152 provided on both sides of the carcass 140, a carcass cord 153 and a carcass stopper 154 are provided, and A first reinforcing member 155 and a second reinforcing member 156 are provided between the caster 154 and the carcass 140.

Accordingly, the carcass 140 may reinforce the rigidity through the first reinforcing member 155 and the second reinforcing member 156 provided on both sides, and the first reinforcing member 155 and the second Due to the carcass cord 153 and the carcass stopping 154 disposed outside the reinforcing member 156, the rigidity may be additionally supplemented.

In addition, as for the bead filler, a first bead filler 151 is disposed on the inside of the tire based on the carcass 140 of the end face of the tire, and a second bead filler 152 is disposed outside the tire, and the first bead The filler 151 and the second bead filler 152 may be made of rubber materials having different properties.

In more detail, the bead filler may be divided into a first bead filler 151 and a second bead filler 152 through the carcass 140, and the first bead filler 151 and the second bead By configuring the filler 152 of rubber materials having different properties, it is possible to control the stiffness and weight according to the conditions of the tire.

In addition, a first reinforcing member 155 is disposed between the first bead filler 151 and the carcass 140, and a second reinforcing member is disposed between the second bead filler 152 and the carcass 140. 156 can be deployed.

More specifically, the first reinforcing member 155 is provided in the first bead pillar 151, and the second reinforcing member 156 is provided in the second bead pillar 152, and the carcass 140 ), a first reinforcing member 155, a first bead pillar 151, a second reinforcing member 156, and a second bead pillar 152 are provided on both sides.

Therefore, the first reinforcing member, the first bead pillar 151, the second reinforcing member 156, and the second bead pillar 152 are provided around the carcass 140 to increase the rigidity of the carcass 140. By reinforcing, deformation of the bead portion 150 can be prevented.

In addition, the first reinforcing member 155 and the second reinforcing member 156 may be arranged to have an angle of 0 to 90 degrees with respect to the position of the carcass 140 to control the stiffness of the bead portion 150. .

More specifically, the carcass 140 is disposed so as to cross the bead portion 150 based on the cross-section of the tire, and the first reinforcing member 155 and the second reinforcing member 156 If the carcass 140 is arranged parallel to the arrangement direction, it is determined that the arrangement is 0 degrees, and when it is arranged vertically, the arrangement is determined to be 90 degrees, and the first reinforcing member 155 and the second reinforcing member 156 and The rigidity of the carcass 140 may be controlled by adjusting the angle with the carcass 140.

That is, the first reinforcing member 155 may be disposed horizontally or vertically with respect to the arrangement direction of the carcass 140 or may be disposed at a predetermined angle, and the second reinforcing member 156 is the first The reinforcing member 155 may be disposed at the same angle or at different angles, and the rigidity of the tire may be improved by applying according to the position or size of the external force applied to the tire through the above arrangement.

Specifically, by changing the angle of the first reinforcing member 155 or the second reinforcing member 156 as described above, the left and right balance in the vehicle to which the tire is coupled can be easily adjusted by adjusting the angle, and one part of the vehicle Alternatively, the stiffness of the bead portion may be weakened or strengthened according to the design condition of a portion of the tire, so that the tire can be easily tuned in a direction favorable to the performance of the vehicle.

3 is a view showing a deformation of a rim according to a speed of a conventional pneumatic tire and a pneumatic tire having a reinforcing member according to another embodiment of the present invention.

Referring to Figures 2 to 3, looking at the deformation of the rim at a speed of 100 km / h and 300 km / h under the condition of a pneumatic pressure of 2.5 bar and a load of 330 kgf, the conventional pneumatic tire (A) is 300 km / h (red solid line) Higher deformation occurs compared to 100km/h (blue solid line), but in the case of the pneumatic tires 100 and B with the reinforcing member according to the present invention, the deformation of the rim is greatly increased even at 300km/h due to the reinforcing member. It doesn't work.

Therefore, by reinforcing the carcass 140 through the reinforcing member, the deformation of the bead portion 150 can be reduced, and the seating property of the rim at high speed is improved, so the stability of adjustment at high speed and the durability due to deformation reduction It can improve performance.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: pneumatic tire with reinforcing member
111: tread
112: sidewall
113: rim cushion
114: inner liner
120: reinforcement belt
130: steel belt
140: Carcass
150: bead part
151: first bead filler
152: second bead filler
153: carcass code
154: Kakastopping
155: first reinforcing member
156: second reinforcing member

Claims (8)

A pneumatic tire comprising a tread, which is a thick rubber layer directly in contact with the road surface, a sidewall curved to both sides of the tread, and a bead portion provided to have a difference in rubber hardness to mount the tire to the rim of a vehicle,
A carcass disposed so as to cross the inside of the tire along the cross-sectional shape of the tire and the lower end thereof toward the lower end of the bead portion;
The bead part,
A bead pillar disposed so that the end of the carcass is inserted toward the lower end across the inside;
A first reinforcing member disposed between the bead pillar and the carcass in the inner direction of the tire based on the carcass to reduce deformation of the bead portion; And
A second reinforcing member disposed between the bead pillar and the carcass in an outer direction of the tire based on the carcass to reduce deformation of the bead portion;
Including,
The first reinforcing member and the second reinforcing member are disposed to surround the carcass in the inner and outer directions of the tire, and are provided to support both sides of the carcass to supplement the rigidity of the carcass,
Between the carcass and the bead pillar, a carcass cord and a carcass to improve the rigidity of the bead portion, and the first and second reinforcing members are disposed between the carcass and the carcass. Pneumatic tire provided with a reinforcing member, characterized in that complements the rigidity of the carcass.
The pneumatic tire with a reinforcing member according to claim 1, wherein the first reinforcing member and the second reinforcing member are cord layers configured to include at least one metal, aramid, and nylon.
The method of claim 2, wherein the first reinforcing member is composed of a steel wire cord made of a metal material, and the second reinforcing member is composed of an aramid nylon cord composed of aramid and nylon, so that the stiffness of the inner and outer beads are different from each other. Pneumatic tire having a reinforcing member, characterized in that.
delete delete The bead filler of claim 1, wherein a first bead filler is disposed on an inner side of the tire based on a carcass of a cross-section of the tire, a second bead filler is disposed outside the tire, and the first bead filler and the second bead filler are disposed on the outside of the tire. The bead filler is a pneumatic tire having a reinforcing member, characterized in that it is made of rubber materials of different properties.
The reinforcing member according to claim 6, wherein a first reinforcing member is disposed between the first bead pillar and the carcass, and a second reinforcing member is disposed between the second bead pillar and the carcass. Equipped with pneumatic tires.
The air with a reinforcing member according to claim 7, wherein the first reinforcing member and the second reinforcing member are arranged to have an angle of 0 to 90 degrees with respect to the position of the carcass to control the stiffness of the bead part. Mouth tires.

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