KR20210085941A - Tire - Google Patents

Abstract

A tire is disclosed. The present invention comprises: a tread unit coming in contact with the ground; a sidewall unit extended from both ends of the tread unit; a bead unit extended from the sidewall unit; and a plurality of protrusion units disposed on an outer surface of the sidewall unit and spaced from each other in a circumferential direction. The tire reduces air resistance and improves fuel efficiency.

Description

tire {Tire}

Embodiments of the present invention relate to tires.

A vehicle driven by users is composed 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 performance requirements for tires vary. For example, the grip performance of the tire on a wet road surface, the abrasion performance to improve the driving distance (mileage), and the fuel efficiency performance that can drive a long distance with less fuel are representative.

The above-mentioned background art is technical information possessed by the inventor for 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 filing of the present invention.

SUMMARY Embodiments of the present invention provide a tire with reduced air resistance and improved fuel efficiency.

In one aspect of the present invention, a tread portion in contact with the ground, a sidewall portion extending from both ends of the tread portion, a bead portion extending from the sidewall portion, and a plurality are disposed on the outer surface of the sidewall portion, circumferential direction To provide a tire including protrusions spaced apart from each other.

In addition, the protrusion may include a main protrusion having a predetermined length in the circumferential direction, and sub protrusions smaller in size than the main protrusion and disposed on both sides of the main protrusion.

Also, the height of the main protrusion may be greater than the height of the sub protrusion.

In addition, the protrusion may have a flow guide groove formed by connecting the inclined surface of the main protrusion and the inclined surface of the sub protrusion.

Another aspect of the present invention is a tread portion in contact with the ground, a sidewall portion extending from both ends of the tread portion, a bead portion extending from the sidewall portion, a plurality of doedoe arranged on the outer surface of the sidewall portion, circumferential direction Provided is a tire including a first protrusion disposed to be spaced apart from each other, and a second protrusion disposed adjacent to the first protrusion and disposed adjacent to the bead.

In addition, the size of the first protrusion may be larger than that of the second protrusion.

In addition, the first protrusion includes a first main protrusion having a predetermined length in the circumferential direction, and first sub protrusions smaller in size than the first main protrusion and disposed on both sides of the first main protrusion, , The second protrusion includes a second main protrusion having a predetermined length in the circumferential direction, and a second sub protrusion smaller in size than the second main protrusion and disposed on both sides of the second main protrusion, The adjacent first sub-projection and the second sub-projection may be disposed to be spaced apart from each other in a radial direction of the tire.

Another aspect of the present invention is a tread portion in contact with the ground, a sidewall portion extending from both ends of the tread portion, a bead portion extending from the sidewall portion, and a plurality of protrusions disposed on the outer surface of the sidewall portion to provide a tire including protrusion units spaced apart from each other to form a pattern.

Also, the plurality of protrusions may be spaced apart from each other in radial and circumferential directions to form a protrusion group, and the plurality of protrusion groups may be spaced apart from each other to arrange the protrusion units.

In addition, in the group of protrusions, the plurality of protrusions may be arranged in a predetermined arrangement, and in the protrusion unit, the plurality of groups of protrusions may be arranged according to the arrangement.

In addition, the protrusion unit may be disposed on the front surface of the side wall portion.

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 an embodiment of the present invention, the protrusion is disposed on the outer side of the sidewall portion, thereby reducing air resistance during driving of the tire, thereby improving fuel efficiency. A plurality of protrusions are arranged to be spaced apart or form a set pattern along the circumferential direction of the tire, and air moves along the flow guide grooves disposed between the protrusions, thereby reducing air resistance.

In the tire according to an embodiment of the present invention, protrusions having different sizes are disposed on the outside of the sidewall portion, thereby reducing air resistance. Sub protrusions are disposed on both sides of the main protrusion, and since the size of the main protrusion is larger than the size of the sub protrusion, air moves along the flow guide groove disposed between the main protrusion and the sub protrusion, but moves to the low sub protrusion. The air can be easily evacuated, maintaining the flow of air.

In the tire according to an embodiment of the present invention, protrusions having different sizes are disposed on the outside of the sidewall portion, so that noise generated during driving can be reduced. Noise generated in the sidewall part is interfered with and scattered by the protrusion, so that noise can be reduced.

1 is a perspective view illustrating a tire according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along II-II of FIG. 1 .
FIG. 3 is a side view showing the sidewall portion of FIG. 1 .
4 is an enlarged view illustrating an enlarged area A of FIG. 3 .
5 is a cross-sectional view taken along V-V of FIG. 4 .
6 is a perspective view illustrating a tire according to another embodiment of the present invention.
7 is a perspective view illustrating a tire according to 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 another, not in a limiting sense.

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 of adding one or more other features or components is not excluded in advance.

In the following embodiments, when it is said that a part such as a film, region, or component is on or on another part, it is not only when it is directly on the other part, but also another film, region, component, etc. is interposed therebetween. Including cases where there is

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.

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

1 and 2 , the tire 100 may include a tread part 110 , a sidewall part 120 , and a bead part 130 .

The tread 110 may have a ground and a ground plane, and may have a tread block TB partitioned by a plurality of grooves. The tread block TB is a portion in contact with the ground when the vehicle is driven, and is formed by a first groove 115 circumferentially in the radial direction of the tire 100 and a second groove formed in the transverse direction of the tire 100 . can be partitioned.

A body ply 140 , a belt layer 150 , a cap ply 160 , and an inner liner 170 may be included under the tread 110 .

The sidewall part 120 connects between the tread part 110 and the bead part 130 . The protrusion 180 may be disposed on the outer surface of the sidewall part 120 in the circumferential direction (C).

The bead part 130 is provided at the end of the sidewall part 120 and serves to mount the tire 100 to the rim of the vehicle. The bead part 130 may include a bead core 131 and a bead filler 132 .

The bead core 131 is disposed under the bead filler 132 and may be formed by twisting a plurality of rubber-coated steel bead cords (wires).

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.

The body ply 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 body ply 140 may have a structure in which a body ply cord is included in a certain rubber component. The body ply 140 is disposed under the belt layer 150 , is extended to the sidewall part 120 and turned up in the bead part 130 , and may have a body ply cord therein.

Since the body ply 140 is turned up in the bead part 130 , an inner space surrounded by the body ply 140 may be created. The body ply 140 is turned up from the bead part 130 and extends toward the side wall part 120 , and the end is connected to the body ply 140 to form an internal space. A bead core 131 and a bead filler 132 are disposed in the inner space.

The body ply 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 body ply 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 includes a first belt layer 151 and a second belt layer 152 , at least one of which extends in the circumferential direction, and a plurality of them are arranged to be spaced apart in the width direction of the tire 100 . A steel cord may be provided.

The first belt layer 151 is disposed under the tread unit 110 , reduces road impact when the vehicle is driving, and protects the body fly 140 . The first belt layer 151 is disposed on the inner liner 170 and may have a preset width. The second belt layer 152 is disposed on the first belt layer 151 , and may have a predetermined width shorter than that in the width direction of the first belt layer 151 .

The cap ply 160 may cover both ends of the belt layer 150 . The cap ply 160 is a special cord paper to be attached, which can improve performance during driving. The cap ply 160 may include, for example, polyester synthetic fibers.

The inner liner 170 may be disposed inside the tire 100 to prevent air leakage and maintain air pressure in the tire 100 . In addition, the inner liner 170 may prevent the air containing moisture from the outside of the tire 100 from penetrating into the inside. 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 or the like.

FIG. 3 is a side view showing the sidewall part 120 of FIG. 1 , FIG. 4 is an enlarged view showing area A of FIG. 3 , and FIG. 5 is a cross-sectional view taken along V-V of FIG. 4 .

3 to 5 , the protrusion 180 is disposed on the outer surface of the sidewall part 120 , and a plurality of protrusions 180 may be disposed to be circumferentially spaced apart from each other in the circumferential direction C of the tire 100 .

The protrusion 180 may include a plurality of protrusions having different sizes. The number of protrusions is not limited to a specific number, and may be variously set. However, hereinafter, for convenience of description, the protrusion 180 having three protrusions will be mainly described. In an embodiment, the protrusion 180 may include a main protrusion 181 disposed at the center and sub protrusions 182 disposed on both sides of the main protrusion 181 .

The main protrusion 181 has a predetermined length l in the circumferential direction. The main protrusion 181 may have inclined surfaces inclined in both directions, and may have a first peak 181P in the center. The main protrusion 181 may have a substantially triangular prism shape in which the first peak 181P protrudes outward.

The sub protrusion 182 may be disposed on both sides of the main protrusion 181 . The sub-protrusions 182 may be disposed on both sides of the tire 100 in the width direction. In an embodiment, the sub protrusion 182 may extend to the same length l as the main protrusion 181 .

The sub-protrusion 182 may have an inclined surface inclined in both directions, and may have a second peak 182P in the center. The sub protrusion 182 may also have a shape similar to that of the main protrusion 181 , and may have a substantially triangular prism shape in which the second peak 182P protrudes outward.

The sub protrusion 182 may be formed to be smaller in size than the main protrusion 181 . The central protrusion 181 may have a height of h1, and the sub protrusion 182 may have a height of h2 smaller than h1. The height of the main protrusion 181 is formed to be greater than the height of the sub protrusion 182 , so that the flow of the tire 100 can be guided when the tire 100 is running.

In an embodiment, the pair of sub-protrusions 182 disposed on both sides of the main protrusion 181 may have the same volume. As shown in FIG. 4 , the pair of sub-protrusions 182 may have the same height and length, and thus may be substantially the same.

In another embodiment, the pair of sub-protrusions 182 disposed on both sides of the main protrusion 181 may have different volumes. Although not shown in the drawings, the size of the sub protrusion adjacent to the tread part 110 may be larger than the size of the sub protrusion adjacent to the bead part 130 . Since a relatively strong flow of external air is formed in the tread unit 110 , the flow of external air may be guided by the sub-protrusion having a large size.

The flow guide groove 183 is formed by the main protrusion 181 and the sub protrusion 182 . The flow guide groove 183 may be formed by connecting the inclined surface of the main protrusion 181 and the inclined surface of the sub-protrusion 182 . The flow guide groove 183 is formed of a flat inclined surface of the main protrusion 181 and a flat inclined surface of the sub-protrusion 182 . Since the first peak 181P of the main protrusion 181 and the second peak 182P of the sub protrusion 182 have different heights, the flow guide groove 183 may have an asymmetric shape.

The flow guide groove 183 may guide the flow of air adjacent to the sidewall part 120 when the tire 100 is running. The flow guide groove 183 guides the surrounding air of the sidewall part 120 to move in the circumferential direction C of the tire 100 , thereby minimizing air resistance generated at the side of the tire 100 .

While the tire 100 is running, air is guided to move along the flow guide groove 183 disposed between the main protrusion 181 and the sub protrusion 182 . At this time, since the height of the sub protrusion 182 is lower than that of the main protrusion 181 , the flow-guided air is discharged toward the sub protrusion 182 , thereby reducing air resistance of the tire. That is, the flow guide groove 183 guides the flow direction of the air adjacent to the sidewall part 120, but quickly discharges the air guided toward the sub-protrusion 182, so that the air is concentrated in the sidewall part 120. By preventing it, it is possible to reduce air resistance received by the sidewall part 120 .

In an embodiment, the protrusion 180 may have a base supporting the main protrusion 181 and the sub protrusion 182 . The base has a predetermined height and can support the main protrusion 181 and the sub protrusion 182 .

In an embodiment, the protrusion 180 may have a size of any one of 10 μm to 100 μm. The length l of the protrusion 180 , the height h1 of the main protrusion 181 , and the height h2 of the sub protrusion 182 may have any one of 10 μm to 100 μm. The protrusion 180 has a very small size, and the aerodynamic force received by the tire 100 may be reduced to improve fuel efficiency.

In the tire 100 according to an embodiment of the present invention, the protrusion 180 is disposed on the outside of the sidewall part 120 to reduce air resistance during driving of the tire 100 to improve fuel efficiency. A plurality of protrusions 180 are disposed to be spaced apart from each other in the circumferential direction C of the tire 100 , and air moves along the flow guide grooves 183 disposed between the protrusions, thereby reducing air resistance.

In the tire 100 according to an embodiment of the present invention, protrusions having different sizes are disposed on the outside of the sidewall part 120 to reduce air resistance. Sub protrusions 182 are disposed on both sides of the main protrusion 181 , and since the size of the main protrusion 181 is larger than the size of the sub protrusion 182 , it is disposed between the main protrusion 181 and the sub protrusion 182 . Although the air moves along the flow guide groove 183, the air moving to the sub-protrusion 182 with a low height is easily discharged, so that the flow of air can be maintained.

In the tire 100 according to an embodiment of the present invention, protrusions having different sizes are disposed on the outside of the sidewall part 120 to reduce noise generated during driving. Noise generated by the sidewall part 120 may be interfered with and scattered by the protrusion part 180 , and thus noise may be reduced.

6 is a perspective view illustrating a tire according to another embodiment of the present invention.

Referring to FIG. 6 , a first protrusion 280 and a second protrusion 290 having different sizes may be disposed on the sidewall portion of the tire. The first protrusion 280 and the second protrusion 290 are similar in shape to the above-described protrusion 180, but have differences in size and arrangement. Hereinafter, the first protrusion 280 and the second protrusion 290 are different. ) will be described focusing on the size and arrangement of the

A plurality of first protrusions 280 are disposed on the outer surface of the sidewall portion, and are disposed to be spaced apart from each other in the circumferential direction (C). The first protrusion 280 is disposed adjacent to the tread 110, and is smaller in size than the first main protrusion 281 having a predetermined length in the circumferential direction (C) and the first main protrusion 281, , may include first sub-projections 282 disposed on both sides of the first main protrusion 281 .

One side of the second protrusion 290 is adjacent to the first protrusion 280 , and the other side is disposed adjacent to the bead part 130 . The second protrusion 290 is smaller in size than the second main protrusion 291 having a predetermined length in the circumferential direction (C) and the second main protrusion 291 , and is located on both sides of the second main protrusion 291 . A second sub-protrusion 292 may be disposed. The adjacent first sub-projection 282 and the second sub-projection 292 are disposed to be spaced apart from each other in the radial direction of the tire.

The size of the first protrusion 280 may be larger than that of the second protrusion 290 . A volume of the first main protrusion 281 may be larger than a volume of the second main protrusion 291 , and a volume of the first sub protrusion 282 may be larger than a volume of the second main protrusion 291 .

Since the volume of the first protrusion 280 disposed adjacent to the tread part 110 is greater than that of the second protrusion 290 adjacent to the bead part 130 , air resistance of the tire may be minimized. A strong air flow is generated in the sidewall part 120 adjacent to the tread part 110 while the tire is running, and a relatively weak air flow is generated in the sidewall part 120 adjacent to the bead part 130 . Since the tire according to the present invention has a relatively large size of the first protrusion 280 , it is possible to reduce tire air resistance by stably guiding a strong air flow in the sidewall part 120 adjacent to the tread part 110 . .

7 is a perspective view illustrating a tire 300 according to another embodiment of the present invention.

Referring to FIG. 7 , a plurality of protrusions 180 are disposed to be spaced apart from each other on the sidewall portion of the tire 300 to have a protrusion unit 380 having a pattern.

The plurality of protrusions 180 may be grouped to form a protrusion group, and the plurality of protrusion groups may be patterned to form the protrusion unit 380 . The protrusion unit 380 may be disposed on the front side of the sidewall part 120 .

7 shows that a pattern is formed on the sidewall part 120 by eight protrusion units (u1, u2, u3, u4, u5, u6, u7, u8), but the size of the sidewall part 120 is not limited thereto. It can be set in various ways according to Since the protrusion 180 has substantially the same shape as the protrusion of the above-described embodiment, a detailed description thereof will be omitted.

In the tire 300 , the plurality of protrusions 180 may be disposed to be spaced apart from each other in the radial and circumferential directions to form a protrusion group, and the plurality of protrusion groups may be disposed to be spaced apart from each other so that the protrusion unit 380 may be arranged. In particular, in the protrusion group, the plurality of protrusion units 180 may be arranged in a preset arrangement, and in the protrusion unit, the plurality of protrusion groups may be arranged according to the same arrangement.

In an embodiment, the protrusions 180 are arranged in a preset arrangement to form a protrusion group. The protrusions 180 may form rows spaced apart from each other in the radial direction, and the protrusions 180 may be deviated from each other in spaced apart spaces on both sides of the rows. For example, in the protrusion group, four protrusions 180 are arranged to be spaced apart from each other in the radial direction of the tire in one row, and three protrusions 180 are arranged to be spaced apart from each other in the radial direction of the tire in one row. For example, ten protrusions 180 may form one protrusion group.

The protrusion groups are arranged in a predetermined arrangement to form the protrusion unit 380 . The groups of protrusions may be formed to be spaced apart from each other in a radial direction, and the groups of protrusions may be displaced in spaced apart from each other on both sides of the rows.

For example, the first protrusion unit 380 may be formed by disposing seven protrusions 180 to be spaced apart from each other. In the protrusion unit 380, three protrusion groups g1, g5, and g7 are arranged to be spaced apart from each other in the radial direction of the tire in one row, and two protrusion groups g2 and g4 are arranged in one row in the radial direction of the tire. The two groups of protrusions g3 and g6 may be arranged to be spaced apart from each other in the direction, and the two protrusion groups g3 and g6 may be arranged to be spaced apart from each other in the radial direction of the tire in one row.

The protrusion units 380 may be arranged in a preset arrangement to form a pattern. Referring to FIG. 7 , the protrusion units u1 and u2 are disposed in the radial direction of the tire, and the protrusion units u3 and u4 are disposed on both sides of the tire to form a pattern.

In one embodiment, in the tire 300, the protrusions 180 form a protrusion group in a fractal arrangement, the protrusion group forms the protrusion unit 380 in a fractal arrangement, and the protrusion unit 380 forms a sidewall portion in a fractal arrangement. 120 may be disposed.

In the tire 300 according to an embodiment of the present invention, a plurality of protrusions 180 are patterned to form an arrangement, so that air resistance of the tire 300 can be reduced. Since the plurality of protrusions are arranged in a preset arrangement to form a protrusion group, and the plurality of protrusion groups are arranged in a preset arrangement to form a protrusion unit, movement of air adjacent to the sidewall unit 120 while the tire 300 is running can guide you.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but it will be understood by those skilled in the art 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 portion
130: bead unit
180: protrusion
181: main turn
182: sub protrusion
183: flow guide groove

Claims (11)

a tread in contact with the ground;
sidewall portions extending from both ends of the tread portion;
a bead portion extending from the sidewall portion; and
A tire comprising; a plurality of protrusions disposed on the outer surface of the sidewall portion, the protrusions being spaced apart in the circumferential direction. According to claim 1,
the protrusion
a main protrusion having a predetermined length in the circumferential direction; and
and sub-projections smaller in size than the main protrusion and disposed on both sides of the main protrusion. 3. The method of claim 2,
The main protrusion
A tire, wherein the height is greater than the height of the sub-protrusion. 3. The method of claim 2,
the protrusion
and a flow guide groove formed by connecting the inclined surface of the main protrusion and the inclined surface of the sub protrusion. a tread in contact with the ground;
sidewall portions extending from both ends of the tread portion;
a bead portion extending from the sidewall portion;
a plurality of first protrusions disposed on the outer surface of the sidewall portion and spaced apart from each other in the circumferential direction; and
and a second protrusion disposed adjacent to the first protrusion and disposed adjacent to the bead. 6. The method of claim 5,
and the first protrusion is larger in size than the second protrusion. 6. The method of claim 5,
the first protrusion
a first main protrusion having a predetermined length in the circumferential direction; and
and a first sub-projection smaller in size than the first main protrusion and disposed on both sides of the first main protrusion;
the second protrusion
a second main protrusion having a predetermined length in the circumferential direction; and
and a second sub-protrusion smaller in size than the second main protrusion and disposed on both sides of the second main protrusion;
The adjacent first sub-projection and the second sub-projection are disposed to be spaced apart from each other in a radial direction of the tire. a tread in contact with the ground;
sidewall portions extending from both ends of the tread portion;
a bead portion extending from the sidewall portion; and
A tire comprising; a protrusion unit disposed on the outer surface of the sidewall part, the plurality of protrusions being spaced apart from each other to form a pattern. 9. The method of claim 8,
A tire, wherein a plurality of the protrusions are spaced apart from each other in radial and circumferential directions to form a protrusion group, and the plurality of protrusion groups are spaced apart from each other to arrange the protrusion units. 10. The method of claim 9,
The group of protrusions is arranged in a predetermined arrangement of the plurality of protrusions,
wherein the protrusion unit is arranged such that a plurality of groups of the protrusions are arranged according to the arrangement. 9. The method of claim 8,
The protrusion unit is
The tire is disposed on the front side of the sidewall portion.

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