KR20220168622A - Pneumatic tires with improved steering stability - Google Patents

Abstract

One embodiment of the present invention provides a tire which prevents degradation of wet grip due to clogging of lateral grooves during cornering during driving of the tire to improve steering stability. According to the embodiment of the present invention, the pneumatic tire with improved steering stability comprises: the lateral grooves, which are grooves formed on both sides of a tread, formed in a perpendicular direction to a circumferential direction of the tire; and an auxiliary block extended in a depth direction of the lateral groove to be formed in a shape of protruding from a floor surface of the lateral groove.

Description

Pneumatic tires with improved steering stability {PNEUMATIC TIRES WITH IMPROVED STEERING STABILITY}

The present invention relates to a pneumatic tire with improved steering stability, and more particularly, to improve steering stability by preventing a decrease in wet grip due to clogging of a letter groove during cornering while driving the tire. It's about improved tires.

Among the important performances of pneumatic tires, braking and handling on wet roads are gradually being emphasized. To this end, research and development to improve drainage performance for discharging water introduced into the groove or kerf of a tire is being continued.

In order to improve the drainage efficiency from the tire to the outside of the tire, a lateral groove, which is a groove formed adjacent to both sides of the tread, that is, the shoulder of the tire, is formed, and the shape or size of such a lateral groove is Various attempts have been made to facilitate drainage while deforming.

However, in the lateral groove as described above, the shape of the lateral groove is deformed due to deformation of the tire in situations such as when the tire is cornering, and the lateral groove is clogged. There is a problem in that the drainage efficiency of the tire is lowered. .

In Korean Patent Registration No. 10-1861473 (title of the invention: three-dimensional tread cuff of a tire), a tubular flow path part wider than the width of the cuff inlet is formed at the lower part of the cuff formed on the tread block of the tire, and the cuff inlet is formed. and the passage pipe are connected by a connecting hole band, and the kerf inlet is formed in a zigzag wave along the circumferential direction of the tire of the tread block, and the zigzag wave is formed to have a small amplitude along the depth direction of the tread block, , A water column part is formed in a portion of the zigzag wave to absorb water around the kerf from the tire surface with a width or diameter larger than the width of the connecting hole band, and the water column part is formed vertically along the depth direction of the tread block. And, a three-dimensional tread kerf of a tire is disclosed, characterized in that the vertex at which the water column is formed is formed at the center line (C) of the zigzag wave.

Republic of Korea Patent No. 10-1861473

An object of the present invention to solve the above problems is to prevent a decrease in wet grip due to clogging of a letter groove when performing cornering or the like while driving a tire.

And, an object of the present invention is to maintain the stiffness of the shoulder block forming the lateral groove even when the shape of the lateral groove is deformed.

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

The configuration of the present invention for achieving the above object is, in a tire in which a plurality of blocks and a plurality of grooves are formed on a tread, with grooves formed on both sides of the tread, in a direction perpendicular to the circumferential direction of the tire formed lateral groove; and an auxiliary block extending along the depth direction of the lateral groove and formed in a shape protruding from the bottom surface of the lateral groove.

In an embodiment of the present invention, the width of the lateral groove may gradually increase from the inner end of the lateral groove toward the center of the tread toward the outer end of the lateral groove.

In an embodiment of the present invention, the cross section of the pillar-shaped auxiliary block may be circular, elliptical or polygonal.

In an embodiment of the present invention, at least one auxiliary block may be formed in one lateral groove.

In an embodiment of the present invention, the auxiliary block is disposed between a point that is 1/3 and a point that is 2/3 of the length of the shoulder block, which is a block forming the lateral groove, from the inner end of the lateral groove can

In an embodiment of the present invention, the lateral groove is formed between one block and another block, and shape deformation of the one block and the other block may be limited by the auxiliary block.

The effect of the present invention according to the above configuration is that the closing of the lateral groove is prevented and drainage is performed through the lateral groove even when the lateral groove is deformed, so that the fluid flowing into the lateral groove is quickly discharged when driving on a wet road surface. , that the tire handling performance on a wet road surface is increased.

In addition, the effect of the present invention is that the noise moving to the lateral groove through the inner end of the lateral groove is reflected by the auxiliary block and is not emitted to the outside of the tire, so that the tire noise prevention effect can be realized.

In addition, the increase in the distance between the shoulder blocks on both sides of the auxiliary block is limited by the auxiliary block, so that the rigidity of the shoulder block is supplemented, and the braking distance is increased by preventing the deformation of the block from deteriorating in rigidity. that the phenomenon can be prevented.

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 detailed description of the present invention or the configuration of the invention described in the claims.

1 is a perspective view of a lateral groove according to an embodiment of the present invention.
2 is a plan view of a lateral groove according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms, and therefore is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, 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, combined)" with another part, this is not only "directly connected", but also "indirectly connected" with another member in between. "Including cases where In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

Terms used in this 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 dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

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

1 is a perspective view of a lateral groove 200 according to an embodiment of the present invention, and FIG. 2 is a plan view of the lateral groove 200 according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the tire of the present invention in which a plurality of blocks and a plurality of grooves are formed on the tread is a groove formed on both sides of the tread, which is formed in a direction perpendicular to the circumferential direction of the tire. Groove 200 (Lateral Groove); and an auxiliary block 100 extending along the depth direction of the lateral groove 200 and formed in a shape protruding from the bottom surface of the lateral groove 200 .

Here, the lateral groove 200 is formed between one block and another block, and shape deformation of one block and another block can be limited by the auxiliary block 100 . On both sides of the tread, shoulder blocks 300 (Shoulder blocks), which are blocks formed adjacent to the shoulder of the tire, are arranged along the circumferential direction of the tire, and one shoulder block 300 and another shoulder block adjacent thereto are formed. A lateral groove 200 may be formed as a space between 300.

As described above, when the shape of the shoulder block 300 is deformed and the shape of the lateral groove 200 is deformed as the tire is deformed due to handling such as cornering while the tire of the present invention having the shoulder block 300 is formed, the letter The auxiliary block 100 formed in the lull groove 200 supports one or the other shoulder block 300 between the shoulder blocks 300 on both sides, so that each shoulder block 300 is formed by the auxiliary block 100. As the deformation is limited, the shape deformation of each block may be limited.

When the distance between the shoulder blocks 300 increases according to the deformation of the tire, the rigidity of the shoulder blocks 300 decreases. By limiting the increase in the inter-interval distance, the rigidity of the shoulder block 300 is supplemented, and thus, breakage of the shoulder block 300 during tire driving can be prevented. In addition, when there is no auxiliary block 100, when the tire of the present invention slips, the deformation of the shoulder block 300 causes lifting of the contact surface of the block with respect to the road surface. This phenomenon is caused by the auxiliary block 100 ) is prevented, it is possible to prevent a trade-off phenomenon in which a braking distance increases by preventing a decrease in rigidity due to prevention of block deformation.

In addition, when the tire of the present invention runs on a wet road surface, even if the shape of the lateral groove 200 is deformed by the handling of the tire as described above, the shape of the lateral groove 200 is the lateral groove Since the width of the lateral groove 200 increases from the inner end 210 to the outer end, the closing of the lateral groove 200 is prevented, so that the lateral groove 200 even when the lateral groove 200 is deformed Drainage is performed through, so that the fluid flowing into the lateral groove 200 can be quickly discharged when driving on a wet road. Accordingly, the wet grip of the tire of the present invention is increased, and handling performance on a wet road surface can be improved.

As a result of the above effects, the steering stability of the tire of the present invention can be improved.

The cross section of the pillar-shaped auxiliary block 100 may be circular, elliptical or polygonal. The central axis in the height direction of the pillar-shaped auxiliary block 100 may be perpendicular to the bottom surface of the lateral groove 200, and the cross section of the auxiliary block 100 described above is at the central axis in the height direction of the auxiliary block 100 It can be a vertical plane.

The auxiliary block 100 may have a columnar shape in which the lower surface and the upper surface are formed in the same shape, and when the cross section of the auxiliary block 100 is elliptical, the long axis of the elliptical is parallel to the longitudinal direction of the lateral groove 200 The cross section of the auxiliary block 100 may be formed so that, when the cross section of the auxiliary block 100 is a polygon, a straight line connecting the two vertices farthest from each other is parallel to the longitudinal direction of the lateral groove 200 A cross section of the auxiliary block 100 may be formed.

Specifically, as shown in FIGS. 1 and 2, when the cross section of the auxiliary block 100 is formed in a hexagonal shape, the line connecting one vertex and the other vertex at the corresponding position is longer than the line connecting the other vertices. If the maximum length, the cross section of the auxiliary block 100 may be formed such that a line connecting both vertices is parallel to the length direction of the lateral groove 200.

With the configuration as described above, as shown in FIGS. 1 and 2 , the cross section of the auxiliary block 100 as described above may be formed elongated along the longitudinal direction of the lateral groove 200 . Accordingly, even if the auxiliary block 100 is formed in the lateral groove 200, the resistance of the fluid passing through the auxiliary block 100 is reduced, so that the fluid passing through the lateral groove 200 can be easily discharged.

The width of the lateral groove 200 may gradually increase from the inner end 210 of the lateral groove toward the center of the tread toward the outer end 220 of the lateral groove. Here, the inner end of the lateral groove 210 means one end of the lateral groove 200 toward the center of the tread, and the outer end of the lateral groove means the other end of the lateral groove 200 toward the outside of the tire. can do.

Since the lateral groove 200 is formed in the above shape, even if the shape of the lateral groove 200 is deformed while the tire is running, the fluid flowing from the center of the tread to the inner end 210 of the lateral groove A flow path passed through the ral groove 200 and discharged to the outer end 220 of the lateral groove is maintained so that the fluid can be easily discharged.

However, the lateral groove 200 is formed in the shape as described above, and pipe noise generated in the main groove, which is a groove formed in the center of the tread during driving of the tire of the present invention, is generated in the lateral groove 200 When emitted to the outside of the tire of the present invention through, as the width of the lateral groove 200 increases, it adversely affects noise (tire noise), but assists as an obstacle in the lateral groove 200, which is a passage through which noise moves As the block 100 is formed, the noise that has moved to the lateral groove 200 through the inner end 210 of the lateral groove is reflected by the auxiliary block 100 and is not emitted to the outside of the tire, resulting in tire noise of the present invention. preventive effect can be achieved.

And, the width of the inner end 210 of the lateral groove and the width of the outer end may satisfy [Equation 1] below.

[Equation 1]

2 W ≥ W' > W

Here, W is the width of the inner end 210 of the lateral groove, and W' is the width of the outer end 220 of the lateral groove.

Due to the shape of the lateral groove 200 as described above, the width W of the inner end 210 of the lateral groove may be smaller than the width W 'of the outer end 220 of the lateral groove. In addition, the width (W) of the inner end 210 of the lateral groove is formed to be smaller than or equal to twice (2W) the width of the inner end 210 of the lateral groove, the width of the inner end 210 of the lateral groove ( When W) is formed larger than twice the width (2W) of the inner end 210 of the lateral groove, the volume of the shoulder block 300 decreases while the volume of the lateral groove 200 excessively increases, thereby reducing the shoulder block The durability of (300) may deteriorate. In addition, as the distance between the shoulder blocks 300 increases, the efficiency of limiting the shape change of the shoulder block 300 by the auxiliary block 100 as described above may be reduced.

In the cross section of the auxiliary block 100, the axial length, which is the length of the lateral groove 200 in the longitudinal direction, may satisfy the following [Equation 2]. Specifically, the axial length in the cross section of the auxiliary block 100 may be a length parallel to the central axis passing through the center of the lateral groove 200 in the longitudinal direction of the lateral groove 200 .

[Equation 2]

W _{b ≤} W S B /3

Here, W _b is the length in the axial direction, and W _SB is the length of the shoulder block 300, which is a block forming the lateral groove 200.

And, in the cross section of the auxiliary block 100, the length in the width direction, which is the length of the lateral groove 200 in the width direction, can satisfy the following equation. Specifically, the length in the width direction in the cross section of the auxiliary block 100 may be a length in a direction perpendicular to the length in the axial direction described above.

[Formula 3]

h _b ≤ (W+W')/4

Here, h _b is the length in the width direction, W is the width of the inner end 210 of the lateral groove, and W' is the width of the outer end 220 of the lateral groove.

As described above, the cross-sectional shape of the auxiliary block 100 is limited, and thus the column shape of the auxiliary block 100 is formed, so that when the fluid passes through the lateral groove 200, the fluid resistance by the auxiliary block 100 can be minimized.

In addition, since the shape of the lateral groove 200 and the shape of the auxiliary block 100 are limited as in [Equation 1] to [Equation 3], the change in the shape of the letter groove during tire handling is the auxiliary block ( 100) can be maximized.

At least one auxiliary block 100 may be formed in one lateral groove 200 . Specifically, when each condition of [Equation 2] and [Equation 3] described above is satisfied, not only one auxiliary block 100 may be formed in the lateral groove 200, but also a plurality of them. In this way, when the auxiliary block 100 is formed in plurality, the efficiency of limiting the deformation of the lateral groove 200 can be increased by the auxiliary block 100 as described above.

The auxiliary block 100 is disposed between 1/3 and 2/3 of the length of the shoulder block 300, which is a block forming the lateral groove 200 from the inner end of the lateral groove 200 It can be. When the auxiliary block 100 is located closer to the inner end 210 of the lateral groove than the point of 1/3 of the length of the shoulder block 300 from the inner end 210 of the lateral groove, the auxiliary block 100 is lateral Fluid resistance may increase by obstructing the flow of the fluid introduced into the inner end 210 of the groove.

And, when the auxiliary block 100 is located closer to the outer end 220 of the lateral groove than the point of 2/3 of the length of the shoulder block 300 from the inner end 210 of the lateral groove, the auxiliary block 100 and As the distance between the shoulder blocks 300 increases, the effect of the auxiliary block 100 limiting the shape change of the shoulder block 300 may be reduced.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

100: auxiliary block
200: lateral groove
210: inner end of lateral groove
220: outer end of lateral groove
300: shoulder block

Claims (9)

In the tire in which a plurality of blocks and a plurality of grooves are formed on the tread,
lateral grooves formed on both sides of the tread in a direction perpendicular to the circumferential direction of the tire; and
An auxiliary block extending along the depth direction of the lateral groove and formed in a shape protruding from the bottom surface of the lateral groove.
The method of claim 1,
A pneumatic tire with improved steering stability, characterized in that the width of the lateral groove gradually increases from the inner end of the lateral groove toward the center of the tread toward the outer end of the lateral groove.
The method of claim 2,
A pneumatic tire with improved steering stability, characterized in that the width of the inner end and the width of the outer end of the lateral groove satisfy the following equation.
2 W ≥ W'> W
Here, W is the width of the inner end of the lateral groove, and W' is the width of the outer end of the lateral groove.
The method of claim 2,
A pneumatic tire with improved steering stability, characterized in that the cross section of the pillar-shaped auxiliary block is circular, elliptical or polygonal.
The method of claim 4,
In the cross section of the auxiliary block, the axial length, which is the length of the lateral groove in the longitudinal direction, satisfies the following equation.
W _{b ≤} W S B /3
Here, W _b is the length in the axial direction, and W _SB is the length of the shoulder block, which is a block forming the lateral groove.
The method of claim 4,
In the cross section of the auxiliary block, the length in the width direction, which is the length of the lateral groove in the width direction, satisfies the following equation.
h _b ≤ (W+W')/4
Here, h _b is the length in the width direction, W is the width of the inner end of the lateral groove, and W' is the width of the outer end of the lateral groove.
The method of claim 1,
The auxiliary block is a pneumatic tire with improved steering stability, characterized in that at least one formed in one lateral groove.
The method of claim 1,
The auxiliary block is disposed between 1/3 and 2/3 of the length of the shoulder block, which is a block forming the lateral groove from the inner end of the lateral groove Improvement of steering stability made pneumatic tires.
The method of claim 1,
The lateral groove is formed between one block and the other block, and the shape deformation of the one block and the other block is limited by the auxiliary block.

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