KR20160046007A - Winter Tire and Sipe Blade - Google Patents

Winter Tire and Sipe Blade Download PDF

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Publication number
KR20160046007A
KR20160046007A KR1020140140837A KR20140140837A KR20160046007A KR 20160046007 A KR20160046007 A KR 20160046007A KR 1020140140837 A KR1020140140837 A KR 1020140140837A KR 20140140837 A KR20140140837 A KR 20140140837A KR 20160046007 A KR20160046007 A KR 20160046007A
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KR
South Korea
Prior art keywords
insertion groove
projection
protrusion
sipes
concave
Prior art date
Application number
KR1020140140837A
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Korean (ko)
Inventor
조명국
박상욱
류진성
Original Assignee
넥센타이어 주식회사
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Publication date
Application filed by 넥센타이어 주식회사 filed Critical 넥센타이어 주식회사
Priority to KR1020140140837A priority Critical patent/KR20160046007A/en
Publication of KR20160046007A publication Critical patent/KR20160046007A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The present invention relates to a winter tire and a sipe blade for the manufacture of the winter tire. Multiple semi-blocks are divided by a sipe placed in a block of a shoulder part in a width direction. A first protruding part and a first insertion groove part are alternately formed in a width direction on one of both side walls of two semi-blocks, facing each other. A second insertion groove part, into which the first protruding part is inserted, and a second protruding part, inserted into the first insertion groove part, are alternately formed on the other side wall. A third protruding part is formed in the first insertion groove part, a fourth protruding part is formed in the second insertion groove part, a third insertion groove part, into which the third protruding part is inserted, is formed in the second protruding part, and a fourth insertion groove part, into which the fourth protruding part is inserted, is formed in the first protruding part. The present invention is capable of preventing the degradation of the durability of tires by obtaining sufficient block stiffness by minimizing transformation between blocks with a particular shape of the sipe even if the number of sipes increases, and improving steering performance and braking performance as the number of sipes increases while maintaining durability.

Description

{Winter Tire and Sipe Blade}

The present invention relates to a winter tire and a sip blade for manufacturing winter tires, and more particularly to a winter tire for improving durability, braking force and steering performance by improving the shape of a sipe formed on a tire shoulder, Sieve blade.

In general, a block pattern is employed for a tread pattern of a winter tire.

The block pattern is formed so as to improve snow performance by making it easy to engage snow between adjacent blocks in the tire circumferential direction. Further, by forming the sipes in the tire width direction in this block, the driving performance (ice sheet performance) on the ice surface road surface due to the water film removing effect and the edge effect is improved.

Of these, in order to further improve ice sheet performance, it is possible to consider simply increasing the number of caves in the circumferential direction. However, when the number of siphons is increased, the sip interval is narrowed, so that the block stiffness is lowered and the deformation amount of the block is increased. As a result, the stress concentrated on the bottom of the sieve becomes excessive, and cracks easily occur in the bottom of the sieve. That is, if the sipe interval is narrowed by simply increasing the number of sipes to improve the ice sheet performance, the durability of the tire is lowered.

It is preferable not to narrow the sipe interval in the method of improving the ice sheet performance without hindering the durability of the tire. For example, Japanese Unexamined Patent Application Publication No. 2001-39126 discloses a technique of forming a sipe having a shallow depth so as to cross a sipe in the tire width direction apart from the sipe in the tire width direction. Japanese Unexamined Patent Publication (Kokai) No. 2003-237320 discloses a small block divided by open sieves formed so as to be opened with respect to a main groove, the height of the small blocks being different between adjacent small blocks , And a technique of suppressing deformation of a small block by alternately offsetting the depth of the sip is disclosed.

However, since electrons form small cross-sectional sipes, the effect of improving the durability is not necessarily large. In addition, although the latter measures measures against durability, there is a problem that since the blocks having different heights are formed, the grounding pressure of the higher block is increased and is liable to be worn.

An object of the present invention is to provide a winter tire for improving braking force and steering performance while maintaining durability, and a sip blade for manufacturing winter tires.

The tread portion includes a plurality of longitudinal grooves formed on a surface thereof and a plurality of lateral grooves formed on the surface of the tread portion, And is divided into a plurality of blocks,

The block provided on the shoulder portion is divided into a plurality of semi-blocks by a sipe arranged in the width direction, and one side wall of two side walls of the two semi- The first protruding portion and the first protruding portion are alternately formed on the other side wall and the second protruding portion inserted into the first inserting and recessing portion is formed alternately in the other side wall, A third projection portion is formed in the insertion groove portion, a fourth projection portion is formed in the second insertion groove portion, a third insertion groove portion into which the third projection portion is inserted is formed in the second projection portion, And a fourth insertion groove portion into which the four projections are inserted.

The third protrusion is formed at a central portion of the first insertion groove and the fourth protrusion is formed at a central portion of the second insertion groove respectively in the depth direction of the sipe, And the fourth insertion groove is formed at a central portion of the second protrusion, respectively.

In the present invention, one of the third protrusion and the fourth protrusion is formed so as to face the open inlet side of the sipe, the other side is formed to face the opposite side, and the third protrusion and the fourth protrusion One of the third insertion slot and the fourth insertion slot is formed so as to face the opening side of the siphon corresponding to the shape of the protrusion and the other is formed so as to face the opposite side of the opening of the siphon .

In the present invention, the width of the sipes is in the range of 0.1 to 2 mm and the length is in the range of 5 to 60 mm.

In the present invention, the sipes are spaced apart from each other along the extending direction of the longitudinal grooves, and the lengths of the sipes are formed differently from each other.

The present invention also provides a method of manufacturing a tire, comprising the steps of: forming a plurality of longitudinal grooves formed on a tread portion surface of a tire and a plurality of lateral grooves to form sipes in a block provided in a shoulder portion of the tire, For example,

The concavo-convex forming portion bent in a zigzag form in the longitudinal direction at the end side is formed in a row along the longitudinal direction so that the concave portion and the convex portion are repeated on one surface and the convex portion and the concave portion are repeated on the other surface, And a second projection part protruding from the concave-convex forming part and projecting from the other concave part of the concave-convex forming part to form the second insertion part on one of the surfaces The present invention provides a sip blade for winter tire production.

In the present invention, both ends of the concave-convex forming portion are provided with a first rectilinear forming portion and a second rectilinear forming portion, and the concave-convex forming portion has a shape in which concave portions and convex portions are repeated on both sides with reference to the first rectilinear forming portion.

In the present invention, either one of the first projecting portion and the second projecting portion is formed to face the upper side, and the other side is formed to face the lower side.

The winter tires according to the present invention can obtain sufficient block rigidity by minimizing the deformation between the blocks even when the number of sifts is increased by the unique shape of the sip so that the durability of the tire can be prevented from deteriorating, The braking performance and the steering performance are improved.

1 is a view showing a tread portion surface of a winter tire according to the present invention;
2 is an enlarged view of a part of a shoulder portion of a winter tire according to the present invention
3 is a perspective view illustrating two semi-blocks facing each other by sipes in a shoulder portion of a winter tire according to the present invention.
Fig. 4 is a plan view illustrating two semi-blocks separated from each other by sipes in a shoulder portion of a winter tire according to the present invention,
5 is a perspective view showing a sip blade for manufacturing a winter tire according to the present invention.
6 is a cross-sectional view along the line A-A '
7 is a side view of a sip blade for manufacturing winter tires according to the present invention
8 is a view showing an example in which two semi-blocks separated from each other by sipes in a shoulder portion of a winter tire by using a sip blade for manufacturing winter tires according to the present invention are formed

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to the detailed description of the present invention, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a view showing a tread portion 100 of a winter tire according to the present invention. The winter tire includes a tread portion 100, a sidewall portion, a shoulder portion 200 connecting the tread portion 100 and the sidewall portion ), And a bead portion.

Referring to FIG. 1, a winter tire according to the present invention includes a plurality of longitudinal grooves 110 and a plurality of lateral grooves 120 formed on a surface of a tread portion 100.

The tread portion 100 is partitioned into a plurality of blocks 210 by the plurality of longitudinal grooves 110 and the plurality of lateral grooves 120.

The longitudinal grooves 110 are formed to extend in the rotational direction in which the tire rotates, that is, in the circumferential direction of the tire, and are formed in a plurality of distances along the width direction of the tread portion 100.

It is noted that the longitudinal grooves 110 may be formed in two or more than two spaced apart from each other along the width direction of the tread portion 100.

The transverse groove 120 is formed to extend in a direction crossing the longitudinal groove 110, that is, along the width direction of the tread portion 100.

That is, as described above, the tread 100 includes a plurality of longitudinal grooves 110 formed in mutually intersecting directions, and a plurality of lateral grooves 120, (210).

2, a block 210 disposed on the shoulder 200 of the block 210, that is, a block 210 provided on the shoulder 200, is disposed on the sifter 211 disposed in the width direction Blocks 220 are divided into a plurality of semi-

The sipes 211 are formed in the width direction of the tire, that is, in the direction intersecting with the longitudinal groove 110 or in the direction parallel to the lateral groove 120.

The sipe 211 serves to increase the running safety of the tire by generating a water film or an edge effect when the vehicle is running on a comb or snowy road.

The sipe 211 is formed to include a concavo-convex portion extending along the zigzag direction, and includes a first straight portion 211a formed in a straight line, a protruding portion 211b formed in a zigzag shape extending from the first straight portion 211a, And a second rectilinear section 211c formed in a straight line at an end of the concavity and convexity 211b.

The sipes 211 maintain the rigidity of the semi-blocks 220 through the concave-convex portions 211b formed in a zigzag shape between the first rectilinear portion 211a and the second rectilinear portion 211c, To prevent traction on snow and ice.

3, a first protrusion 221 and a first inserting groove 222 are formed on either side wall of two sidewalls of the two semic blocks 220 facing each other with the sipe 211 therebetween in the width direction And a second protruding portion 224 inserted into the first protruding portion 222 is formed alternately on the other side wall of the first protruding portion 221 and the second protruding portion 224 inserted into the first protruding portion 222, A third protrusion 222a is formed in the first inserting groove 222 and a fourth protrusion 223a is formed in the second inserting recess 223 and the second protrusion 223a is formed in the second protrusion 224, A third insertion groove portion 224a into which the third projection portion 222a is inserted is formed and a fourth insertion groove portion 221a into which the fourth projection portion 223a is inserted is formed in the first projection portion 221. [

A first protrusion 221 and a first insertion groove 222 are alternately arranged in a width direction on one side wall of one of the two semi-blocks 220 facing each other with the sipe 211 interposed therebetween. So as to form the concave / convex portions 211b of the jig jig shape.

The second protrusion 224 and the second inserting groove 223 are formed on one side wall of the other one of the two semi-blocks 220 facing each other with the sipe 211 interposed therebetween in the width direction. Are alternately and repeatedly formed to form the concave / convex portions 211b of the jig jig shape.

The first protrusion 221 and the first insertion slot 222, the second protrusion 224 and the second insertion slot 223 are formed in the depth direction of the sipe 211.

The third protrusion 222a is formed at a central portion of the first insertion groove 222 and the fourth protrusion 223a is formed at the center of the second insertion groove 223, The second protruding portion 224a is formed at a central portion of the second protruding portion 224 and the fourth inset groove portion 221a is formed at a central portion of the second protruding portion 224, respectively.

The third protrusion 222a is disposed at the center of the side wall of the semi-block 220 between the first protrusions 221 and the second protrusion 222b is located between the second insertion recesses 223, And the third insertion groove portion 224a is disposed at the center.

The fourth protrusion 223a is disposed at the center of the side wall of the semi-block 220 between the second protrusions 224 and the semi-block 220, The fourth inserting groove portion 221a is disposed at the center of the side wall of the housing.

One of the third protrusion 222a and the fourth protrusion 223a is formed so as to face the upper side, that is, toward the opening side of the sipe 211, and the other side is formed in the opposite direction, One of the third insertion groove portion 224a and the fourth insertion groove portion 221a corresponds to the shape of the three protrusions 222a and the fourth protrusion portion 223a, And the other is formed to face the lower side, that is, the side opposite to the opening of the opening of the sipe 211. [

When the two semi-blocks 220 facing each other due to an external force applied to the tire during the running of the vehicle are deformed in a direction in which they approach each other, the third protrusion 222a and the fourth protrusion 223a, And a locking effect to be inserted into the fourth insertion groove portion 221a to separate the upper portion and the lower portion of the sifter 211 from each other.

One of the third protrusion 222a and the fourth protrusion 223a is directed to the upper side of the sipe 211 and the other side is directed to the lower side of the sipe 211, The groove portion 224a and the fourth insertion groove portion 221a are formed in the third protrusion 222a and the fourth protrusion 223a so that the third protrusion 222a and the fourth protrusion 223a can be inserted, So as to have a high degree of correspondence to the load applied to the upper and lower portions when the locking effect is generated.

The sipes 211 are spaced apart from each other along the extending direction of the longitudinal grooves 110. The lengths of the sipes 211 are different from each other to disperse frequencies of noise generated during traveling, It is desirable to reduce the noise caused by the noise.

The width of the sipes 211 is preferably 0.1 to 2 mm, the lengths thereof 5 to 60 mm, and the spacing between the sipes 211 is preferably within a range of 1 to 10 mm.

FIG. 5 is a perspective view showing a sip blade 300 for manufacturing a winter tire according to the present invention, and FIG. 6 is a front view of a sip blade 300 for manufacturing a winter tire according to the present invention.

5 and 6, a sip blade 300 for manufacturing a winter tire according to the present invention includes a plurality of longitudinal grooves 110 formed on the surface of a tread portion 100 of a tire and a plurality of lateral grooves A siphon blade 300 divided by a plurality of semi-blocks 220 by forming a sieve 211 on a block 210 provided on a shoulder 200 of the tire by being divided by a plurality of semi- The concave and convex forming portions 310 bent in a zigzag form in a zigzag shape are formed in a row along the longitudinal direction so that concave portions and convex portions are repeated on one surface and convex portions and concave portions are repeated on the other surface. That is, one of the lobes becomes convex on the other side, and the convex on one side becomes the lobe on the other side.

The concave-convex forming unit 310 may have a waveform. The convex-concave forming unit 310 may include a first rectilinear forming unit 320 and a second rectilinear forming unit 330 at both ends thereof. The first straight line forming part 320 and the second straight line forming part 330 are provided at the center of the forming part 310 and the concave part and the convex part are repeated on both sides with respect to the first straight line forming part 320 .

A first protrusion 311 protruding from one side of the concave-convex forming part 310 and forming a first insertion part 311a is formed on the other side of the concave-convex forming part 310, And a second protrusion 312 for forming the second inserting portion 312a is formed on the one surface.

Referring to FIG. 7, either one of the first protrusion 311 and the second protrusion 312 is formed to face the upper side, and the other side is formed to face the lower side.

The first protrusion 311 and the second protrusion 312 form the third insertion slot 224a and the fourth insertion slot 221a and the first protrusion 311 and the second protrusion 312, Which is inserted into the third insertion groove 224a and the fourth insertion groove 221a in the first insertion portion 311a and the second insertion portion 312a opposite to the third insertion groove 312, The protrusion 222a and the fourth protrusion 223a are formed.

8, a sip blade 300 for manufacturing a winter tire according to the present invention forms a sipe 211 on a block 210 provided on a shoulder portion 200 of a tire in the process of manufacturing a winter tire And the two semi-blocks 220 are separated from each other through the sifter 211 formed by the semi-

The concave-convex forming part 310 has a first protruding part 221 and a first inserting groove part 222 in a width direction on either side wall of two semi-blocks 220 facing each other through one side in which a concave part and a convex part are repeated. ) Are formed alternately and repeatedly.

The concave-convex forming unit 310 may include two second convex-concave forming units 310, which are inserted into the first convex parts 221 of the two semi-blocks 220 facing each other through another side of the concave- And a second protrusion 224 inserted into the first insertion groove 222 are formed alternately and repeatedly.

The first protrusion 311 protruding from the concave-convex forming part 310 and forming the first insertion part 311a on the other side of the concave- The third inserting groove portion 224a is formed on one of the side walls and the third protrusion portion 222a is formed on the other side wall.

The second protrusion 312 protruding from the concave-convex forming part 310 and forming the second inserting part 312a on the other side of the concave- The fourth inserting groove 221a is formed on one of the side walls and the fourth protrusion 223a is formed on the other side wall.

More specifically, the first insertion portion 311a forms the third protrusion 222a, the first protrusion 221 forms a third insertion groove 224a, and the second insertion portion 312a form the fourth protrusion 223a and the second protrusion 224 forms the fourth insertion slot 221a.

The third protrusion 222a is inserted into the third insertion groove 224a in the winter tire according to the present invention, that is, the sipe 211, and the fourth protrusion 223a is inserted into the fourth insertion A test for comparing braking and steering performance was performed on a winter tire (Example) having a structure inserted into the groove portion 221a and a conventional general winter tire (Comparative Example), and the results are shown in Table 1 below.

Performance Snow Breaking Snow handling Ice Breaking (Snow Breaking) Snow handling Wet Breaking Wet handing Example 115 107 104 102 102 106 Comparative Example 100 100 100 100 100 100

The comparative test of the winter tires according to the present invention and the conventional winter tires is based on the assumption that the braking performance and the steering performance against the snow, That is, the braking performance and the steering performance of the embodiment are expressed as a percentage, and only the braking property of the ice path is the same as that of the conventional tire, and the braking performance and the steering performance of the eye, The performance of tires shows improved performance compared to conventional winter tires.

In particular, in view of the present invention, the braking performance of the winter tires according to the present invention is improved by 18% compared with the conventional winter tires, and therefore, the winter tires according to the present invention have greatly improved the running stability in the winter. .

The winter tires according to the present invention can obtain sufficient block rigidity by minimizing the deformation between the blocks during running even if the number of the sifts 211 is increased by the unique shape of the sifter 211, The braking performance and the steering performance are improved as the number of the siphs 211 increases while maintaining durability.

As described above, an optimal embodiment has been disclosed in the drawings and specification. While specific terms have been employed herein, they are used for the purpose of describing the invention only and are not used to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: tread portion 110: longitudinal groove
120: transverse groove 200: shoulder portion
210: Block 211: Saif
211a: first rectilinear section 211b: concave /
211c: second rectilinear section 220: semi-block
221: first protrusion 221a: fourth insertion groove
222: first insertion groove portion 222a: third projection portion
223: second insertion groove portion 223a: fourth projection portion
224: second protrusion 224a: third insertion groove
300: Saif blade 310:
311: first protrusion 311a: first insertion portion
312: second projection 312a: second insertion portion
320: first straight line forming part 330: second straight line forming part

Claims (8)

A tread portion, a side wall portion, a shoulder portion connecting the tread portion and the side wall portion, and a bead portion, wherein the tread portion is divided into a plurality of blocks by a plurality of longitudinal grooves and a plurality of lateral grooves formed on the surface,
The block provided on the shoulder portion is divided into a plurality of semi-blocks by a sipe arranged in the width direction, and one side wall of two side walls of the two semi- The first protruding portion and the first protruding portion are alternately formed on the other side wall and the second protruding portion inserted into the first inserting and recessing portion is formed alternately in the other side wall, A third projection portion is formed in the insertion groove portion, a fourth projection portion is formed in the second insertion groove portion, a third insertion groove portion into which the third projection portion is inserted is formed in the second projection portion, And a fourth insertion groove portion into which the four projections are inserted. The method according to claim 1,
In the depth direction of the sipes,
Wherein the third protrusion is formed at a central portion of the first insertion groove and the fourth protrusion is formed at a central portion of the second insertion groove and the third insertion groove is formed at a central portion of the second protrusion, And the fourth insertion groove portion is formed at a central portion of the second projection portion. The method according to claim 1,
Wherein one of the third projection and the fourth projection is formed to face the opening side of the sipe and the other side is formed to face the opposite side,
One of the third insertion slot and the fourth insertion slot is formed to face the opening side of the siphon corresponding to the shape of the third projection and the fourth projection and the other is formed so as to face the opening of the siphon And is formed so as to face the opposite side of the inlet. The method according to claim 1,
Wherein the width of the sipes is in the range of 0.1 to 2 mm and the length of the sipes is in the range of 5 to 60 mm. The method according to claim 1,
Wherein the sipes are spaced apart from each other along the extending direction of the longitudinal grooves, and the lengths of the sipes are different from each other. A sip blade partitioned by a plurality of longitudinal grooves formed on a surface of a tread portion of a tire and a plurality of lateral grooves to form sipes in a block provided in a shoulder portion of the tire to divide the sipes into a plurality of semi-
The concavo-convex forming portion bent in a zigzag form in the longitudinal direction at the end side is formed in a row along the longitudinal direction so that the concave portion and the convex portion are repeated on one surface and the convex portion and the concave portion are repeated on the other surface, And a second projection part protruding from the concave-convex forming part and projecting from the other concave part of the concave-convex forming part to form the second insertion part on one of the surfaces Features Saif blades for winter tires manufacturing. The method of claim 6,
The first straight line forming portion and the second straight line forming portion are provided at both ends of the concavity and convexity forming portion,
Wherein the sipe blade has a shape in which recesses and protrusions are repeated on both sides with reference to the first straight line forming portion. The method of claim 6,
Wherein one of the first projection and the second projection is formed to face the upper side and the other side is directed to the lower side.
KR1020140140837A 2014-10-17 2014-10-17 Winter Tire and Sipe Blade KR20160046007A (en)

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Application Number Priority Date Filing Date Title
KR1020140140837A KR20160046007A (en) 2014-10-17 2014-10-17 Winter Tire and Sipe Blade

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Application Number Priority Date Filing Date Title
KR1020140140837A KR20160046007A (en) 2014-10-17 2014-10-17 Winter Tire and Sipe Blade

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KR20160046007A true KR20160046007A (en) 2016-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023119019A1 (en) * 2021-12-23 2023-06-29 Pirelli Tyre S.P.A. Winter tyre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023119019A1 (en) * 2021-12-23 2023-06-29 Pirelli Tyre S.P.A. Winter tyre

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