KR102536159B1 - Sound absorbing material attachment unit and tire comprising the same - Google Patents

Abstract

An embodiment of the present invention is a vacuum pad contacting the inner liner of a tire, adsorbed and fixed to the inner liner, a pad body connected to the vacuum pad and having a vacuum hole through which gas sucked from the vacuum pad passes, and the A sound absorbing material attachment unit for a tire including a sound absorbing material coupled to a pad body is provided.

Description

Sound absorbing material attachment unit and tire comprising the same

Embodiments of the present invention relate to a sound absorbing material attachment unit and a tire including the same.

In recent years, with the advent of electric vehicles, there is a growing demand for improving ride quality and reducing external noise generated by tires as well as interior noise to improve vehicle quality. Among them, the pneumatic tire causes discomfort to the driver and reduces riding comfort because noise originating from the cavity is generated as a sound having a sharp peak in the interior of the vehicle.

In order to reduce such tire resonance noise, conventionally, a special sponge with sound-absorbing performance is mounted on the inner surface of the tire, or an annular body that can be attached to the rim is placed to transform the inner space, and materials such as fur on the wheel surface A method of attaching is proposed. However, if a special sponge with sound-absorbing performance is installed inside the tire or a foreign substance is attached to the surface of the wheel, a separate process is added after manufacturing the tire and wheel, which increases cost and makes it difficult to store the manufactured tire and wheel. may not be In addition, when attached to the entire circumference, the performance of the tire may deteriorate due to an increase in weight.

An object of the present invention is to provide a sound absorbing material attachment unit capable of attaching a sound absorbing material to the inside of a tire without a separate attachment material and a tire including the same.

An embodiment of the present invention is a vacuum pad contacting the inner liner of a tire, adsorbed and fixed to the inner liner, a pad body connected to the vacuum pad and having a vacuum hole through which gas sucked from the vacuum pad passes, and the A sound absorbing material attachment unit for a tire including a sound absorbing material coupled to a pad body is provided.

In one embodiment of the present invention, the pad body includes a pillar part in which the vacuum hole is formed and disposed in a central region of the vacuum pad and protrudes outward, and the sound absorbing material surrounds the pillar part and includes the pad can be attached to the body.

In one embodiment of the present invention, the pad body further includes a fixing part connected to the pillar part and having a larger diameter than the diameter of the pillar part, and the sound absorbing material is positioned between the fixing part and the vacuum pad. can

In one embodiment of the present invention, the diameter of the fixing part may be smaller than the diameter of the sound absorbing material.

In one embodiment of the present invention, the diameter of the vacuum pad may be smaller than the width of the belt layer of the tire.

In one embodiment of the present invention, a tread part in contact with the ground, a bead part mounted on a rim, a sidewall part connecting the tread part and the bead part, and a skeleton of a tire surrounding the bead part, the tread part and the sidewall part And a carcass layer extending along the bead portion, an inner liner forming an inner surface of the tire inside the carcass layer, and a sound absorbing material attachment unit adsorbed and fixed to the inner liner, wherein the sound absorbing material attachment unit comprises the inner liner A tire having a vacuum pad adsorbed and fixed to the inner liner in contact with the liner, a pad body connected to the vacuum pad and formed with a vacuum hole through which gas sucked from the vacuum pad passes, and a sound absorbing material coupled to the pad body. do.

In one embodiment of the present invention, the pad body includes a pillar part in which the vacuum hole is formed and disposed in a central region of the vacuum pad and protrudes outward, and the sound absorbing material surrounds the pillar part and includes the pad can be attached to the body.

In one embodiment of the present invention, the pad body further includes a fixing part connected to the pillar part and having a larger diameter than the diameter of the pillar part, and the sound absorbing material is positioned between the fixing part and the vacuum pad. can

In one embodiment of the present invention, the diameter of the fixing part may be smaller than the diameter of the sound absorbing material.

In one embodiment of the present invention, the diameter of the vacuum pad may be smaller than the width of the belt layer of the tire.

In one embodiment of the present invention, the sound-absorbing material attachment unit is provided in plurality, and may be arranged and attached at regular intervals along the inner liner of the tire.

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

The tire including the sound absorbing material attachment unit according to the embodiments of the present invention is attached by bonding the sound absorbing material to the vacuum pad, so that a separate attachment material is not required and the manufacturing process can be simplified. In addition, since the sound absorbing material attachment unit according to embodiments of the present invention can be applied to a general tire, the general tire can be used as a low-noise tire if necessary.

1 is a perspective view schematically showing a tire according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II of FIG. 1;
3 is a perspective view showing a sound absorbing material attachment unit according to an embodiment of the present invention.
4 is a cross-sectional view of the sound absorbing material attachment unit of FIG. 3 .
5 is a sound absorbing material attachment unit according to another embodiment of the present invention.
6 is a cross-sectional view of the sound absorbing material attachment unit of FIG. 5 .
7 and 8 are views for explaining a form in which the sound absorbing material attachment unit of the present invention is disposed.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail together 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 describing with reference to the drawings, the same or corresponding components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. .

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

In the following examples, expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that features or components described in the specification exist, and do not preclude the possibility that one or more other features or components may be added.

In the drawings, the size of 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 shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

Hereinafter, a tire curing mold 100 according to an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view schematically illustrating a tire according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 .

1 and 2, the tire 100 includes a tread portion 110, a sidewall portion 120 extending from both sides of the tread portion 110, and a bead portion 130 provided at an end of the sidewall portion 120. ) and a carcass layer 40.

In addition, the tire 100 has an inner liner 23 located inside the tread part 110 and the pair of sidewall parts 120 to maintain the internal air pressure of the tire 100 and adsorbed on the inner liner 23. A fixed sound absorbing material attachment unit 200 may be included.

In addition, the tire 100 may include a belt layer 24 and a carcass layer 40 located under the tread portion 110, and a cap ply between the tread portion 110 and the belt layer 24. may be further included.

The tread part 110 is made of a thick rubber layer and transmits driving force and braking force of the vehicle to the ground. On the surface of the tread unit 110, tread patterns 114 for steering safety, traction, and braking properties and blocks 116 partitioned by the tread patterns 114 may be positioned. The tread patterns may include a plurality of grooves for drainage and sipes for improving traction and braking power when driving on a wet road. The grooves may include circumferential grooves coinciding with the driving direction of the vehicle and transverse grooves between the circumferential grooves. A sipe is formed in a block and may be a groove having a smaller size than a groove. Sipes can increase the driving force and braking force of the tire 100 by absorbing moisture and breaking the water film when driving on a wet road. The block 116 is an area that occupies most of the tread portion 110 and directly contacts the ground to transmit driving and braking forces of the vehicle to the ground.

The sidewall portion 120 extends downward from the end of the tread portion 110 and is disposed. The sidewall part 120 is a side part of the tire 100, and protects the carcass layer 40, provides lateral stability of the tire 100, and improves riding comfort by flexing and stretching. In addition, the sidewall portion 120 serves to transmit engine torque received through the drive shaft to the tread portion 110 .

The bead part 130 is provided at the end of the sidewall part 120 and serves to mount the pneumatic tire 100 to the rim. The bead unit 130 may include a bead core 132 formed by twisting a plurality of rubber-coated steel wires and a bead apex 134 attached to the bead core 132 .

The carcass layer 40 forms the skeleton of the tire 100, endures loads and impacts received by the tire 100, and maintains air pressure of the tire 100. The carcass layer 40 may be formed by overlapping a plurality of cord papers made of high-strength fiber organic materials such as steel, polyester, and rayon, and then coating them with rubber and rolling them. The carcass layer 40 may extend along the tread portion 110 , the sidewall portion 120 and the bead portion 130 .

The belt layer 24 between the tread part 110 and the carcass layer 40 can reduce road surface impact during driving of the vehicle and improve driving stability by widening the area of the tread part 110 in contact with the road surface. Separation of the portion 110 and the carcass layer 40 can be prevented. The belt layer 24 may be formed by rolling by coating a plurality of belt cords made of steel with rubber.

A cap ply may be further included between the tread portion 110 and the belt layer 24 . The cap ply is a special cord paper attached to the belt layer 24 and can improve performance during driving. The cap ply may include, for example, polyester synthetic fiber.

The inner liner 23 is a layer that prevents air leakage of the tire 100 instead of a tube, and may be made of a rubber layer having excellent sealing properties. For example, the inner liner 23 may be made of high-density butyl rubber or the like, and may maintain air pressure in the tire 100 .

The sound absorbing material attachment unit 200 includes a sound absorbing material and may be adsorbed and fixed to the inner liner 23 . Hereinafter, the sound absorbing material attachment unit 200 will be described in more detail with reference to the drawings.

3 is a perspective view showing a sound absorbing material attachment unit according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the sound absorbing material attachment unit of FIG. 3 .

Referring back to FIGS. 2, 3 and 4 , the sound absorbing material attachment unit 200 according to an embodiment of the present invention may include a vacuum pad 210, a pad body 220, and a sound absorbing material 230.

The vacuum pad 210 is a part adsorbed and fixed to the inner liner 23 in contact with the inner liner 23, and may be made of, for example, a rubber material having a predetermined elasticity. The vacuum pad 210 may be formed in a circular shape, but may be deformed into any shape that can be adsorbed to the inner liner 23 through vacuum.

The vacuum pad 210 may have a curved surface bent in a direction opposite to the curved surface of the inner liner 23 before being adsorbed to the inner liner 23 . A predetermined space is formed between the vacuum pad 210 and the inner liner 23 before attachment. As the air in this space is sucked through the vacuum hole 225, the vacuum pad 210 having elasticity moves through the inner liner 23. will be adsorbed on

In this case, the diameter W2 of the vacuum pad 210 may be smaller than the width W1 of the belt layer 24 of the tire. When the diameter W2 of the vacuum pad 210 is greater than the width W1 of the belt layer 24 of the tire, interference between the belt layer 24 of the tire and the edge of the vacuum pad 210 may occur. In this case, the adsorption force may be weakened. Accordingly, the diameter W2 of the vacuum pad 210 may be smaller than the width W1 of the belt layer 24 of the tire.

As shown in FIG. 2, the belt layer 24 of the tire may have a dual structure of a first belt layer disposed on the inner liner 23 and a second belt layer disposed on the first belt layer. . In this case, the diameter W2 of the vacuum pad 210 may be smaller than the width of the smaller second belt layer.

The pad body 220 may be connected to the vacuum pad 210 and may form a vacuum hole 225 through which gas sucked from the vacuum pad 210 passes. The pad body 220 has a vacuum hole 225 and may include a pillar portion disposed in a central region of the vacuum pad 210 and protruding outward.

The pad body 220 has greater rigidity than the vacuum pad 210, and can perform a function of stably fixing the sound absorbing material 230. However, since the pad body 220 also has a certain elasticity and flexibly responds to vibrations generated during driving of the tire, it can be stably fixed.

The sound absorbing material 230 may be coupled to the pad body 220 and, at this time, may be attached to one surface of the vacuum pad 210 . That is, as shown in FIG. 3 , the sound absorbing material 230 may be coupled to one surface of the pad body 220 and the vacuum pad 210 in a form surrounding the pillar portion of the pad body 220 .

As one embodiment, the sound absorbing material 230 may be made of a non-woven fabric material. For example, the sound absorbing material 230 may be a spun-bonded non-woven fabric, a spunlace non-woven fabric, a melt-blown non-woven fabric, or a heat-sealed non-woven fabric. (thermally bonded non-woven fabric), dry laying non-woven fabric, needle punching non-woven fabric, stitch bond non-woven fabric and chemical bond non-woven fabric -woven fabric) may include any one or two or more types of non-woven fabrics selected from the group consisting of.

As another embodiment, the sound absorbing material 230 may be made of polyurethane foam. The polyurethane foam forming the sound absorbing material 230 may be formed by mixing a first reactant including an isocyanate component and a second reactant including at least a polyol component and a foaming agent.

When the sound absorbing material 230 is made of a non-woven fabric material, the sound absorbing material 230 is first manufactured in a shape corresponding to the pillar portion of the vacuum pad 210 and the pad body 220, and the pad body 220 and the vacuum pad 210 It can be attached to and coupled to one side of the.

As another embodiment, when the sound absorbing material 230 is made of polyurethane foam, the sound absorbing material 230 is formed by foaming and curing the first and second reactants mixed around the vacuum pad 210. ) and can be coupled to the pad body 220.

5 is a sound absorbing material attachment unit according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view of the sound absorbing material attachment unit of FIG. 5 .

5 and 6, the sound absorbing material attachment unit 200 according to another embodiment of the present invention may include a vacuum pad 210, a pad body 220, and a sound absorbing material 230, similarly to one embodiment. .

The vacuum pad 210 is a part adsorbed and fixed to the inner liner 23 in contact with the inner liner 23, and may be made of, for example, a rubber material having a predetermined elasticity. The vacuum pad 210 may be formed in a circular shape, but may be deformed into any shape that can be adsorbed to the inner liner 23 through vacuum.

The pad body 220 may be connected to the vacuum pad 210 and may form a vacuum hole 225 through which gas sucked from the vacuum pad 210 passes. The pad body 220 has a vacuum hole 225 formed therein, and is disposed in the central region of the vacuum pad 210 and is connected to a pillar part 221 protruding to the outside and the pillar part 221, and the pillar part ( 221) may include a fixing part 222 having a larger diameter than the diameter.

Although the drawing shows that the pillar part 221 and the fixing part 222 are integrally formed, it is not necessarily limited thereto. The pillar part 221 and the fixing part 222 are formed in a combinable form, and after attaching the sound absorbing material 230 on the vacuum pad 210, the fixing part 222 may be coupled.

As shown in FIG. 6 , the fixing part 222 may be connected to the pillar part 221 and may be formed to extend in the circumferential direction of the sound absorbing material attachment unit 200 . In this case, the sound absorbing material 230 may be positioned between the fixing part 222 and the vacuum pad 210 . That is, the fixing part 222 can more stably fix the sound absorbing material 230 to the vacuum pad 210 .

In this case, the diameter of the fixing part 222 may be smaller than the diameter of the sound absorbing material 230 . When the fixing part 222 covers the entire upper part of the sound absorbing material 230, the performance of the sound absorbing material 230 may be degraded, so the diameter of the fixing part 222 may be smaller than that of the sound absorbing material 230.

The sound absorbing material 230 may be coupled to the pad body 220 and, at this time, may be attached to one surface of the vacuum pad 210 . That is, as shown in FIG. 4 , the sound absorbing material 230 may be coupled to one surface of the pad body 220 and the vacuum pad 210 in a form surrounding the pillar portion of the pad body 220 .

The sound absorbing material 230 may be made of a non-woven fabric and attached to the vacuum pad 210 or made of polyurethane foam and foamed between the vacuum pad 210 and the fixing part 222 to be hardened.

7 and 8 are views for explaining a form in which the sound absorbing material attachment unit 200 of the present invention is disposed.

The tire 100 may include a plurality of sound absorbing material attachment units 200 . In other words, the plurality of sound absorbing material attachment units 200 may be arranged at regular intervals along the inner side of the inner liner 23 . The sound absorbing material attachment units 200 may be arranged inside the inner liner 23 in a row as shown in FIG. 7 or may be arranged inside the inner liner 23 in two or more rows as shown in FIG. 8 .

Even when the sound absorbing material attachment units 200 are arranged in one row or two or more rows, the area to which the sound absorbing material attachment units 200 are attached may be smaller than the width of the belt layer 24 as described above.

As described above, the tire including the sound absorbing material attachment unit according to embodiments of the present invention is attached by bonding the sound absorbing material to the vacuum pad, so that a separate adhesive material is not required and the manufacturing process can be simplified. In addition, since the sound absorbing material attachment unit according to embodiments of the present invention can be applied to a general tire, the general tire can be used as a low-noise tire if necessary.

As such, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art will understand that various modifications and variations of the embodiment are possible therefrom. Therefore, the true technical scope of protection 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 part
200: sound absorbing material attachment unit
210: vacuum pad
220: pad body
230: sound absorbing material

Claims (11)

a vacuum pad that contacts the inner liner of the tire and is adsorbed and fixed to the inner liner;
a pad body connected to the vacuum pad and having a vacuum hole through which gas sucked from the vacuum pad passes; and
Including; sound absorbing material coupled to the pad body,
The pad body includes a pillar portion in which the vacuum hole is formed and disposed in a central region of the vacuum pad to protrude outward;
The sound absorbing material is coupled to the pad body in a form surrounding the pillar portion, the sound absorbing material attachment unit of the tire. delete According to claim 1,
The pad body further includes a fixing portion connected to the pillar portion and having a larger diameter than the diameter of the pillar portion;
The sound absorbing material is located between the fixing part and the vacuum pad, the sound absorbing material attachment unit of the tire. According to claim 3,
The sound-absorbing material attachment unit of the tire, wherein the diameter of the fixing part is smaller than the diameter of the sound-absorbing material. According to claim 1,
The sound-absorbing material attachment unit of the tire, wherein the diameter of the vacuum pad is smaller than the width of the belt layer of the tire. A tread part in contact with the ground;
Bead portion mounted on the rim;
a sidewall portion connecting the tread portion and the bead portion;
a carcass layer extending along the tread portion, the sidewall portion, and the bead portion to form a skeleton of the tire by surrounding the bead portion;
An inner liner forming the inner surface of the tire on the inside of the carcass layer; and
Including; sound absorbing material attachment unit adsorbed and fixed to the inner liner,
The sound-absorbing material attachment unit,
a vacuum pad adsorbed and fixed to the inner liner in contact with the inner liner;
a pad body connected to the vacuum pad and having a vacuum hole through which gas sucked from the vacuum pad passes; and
A sound absorbing material coupled to the pad body;
The pad body includes a pillar portion in which the vacuum hole is formed and disposed in a central region of the vacuum pad to protrude outward;
The sound absorbing material is coupled to the pad body in a form surrounding the pillar portion, the tire. delete According to claim 6,
The pad body further includes a fixing portion connected to the pillar portion and having a larger diameter than the diameter of the pillar portion;
The sound absorbing material is located between the fixing part and the vacuum pad, the tire. According to claim 8,
A diameter of the fixing part is smaller than a diameter of the sound absorbing material, the tire. According to claim 6,
The tire, wherein the diameter of the vacuum pad is smaller than the width of the belt layer of the tire. According to claim 6,
The sound-absorbing material attachment unit is provided in plurality, and is arranged and attached at regular intervals along the inner liner of the tire.

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