KR20030046200A - Groove Structure of Heavy Load Radial Tire - Google Patents

Groove Structure of Heavy Load Radial Tire Download PDF

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Publication number
KR20030046200A
KR20030046200A KR1020010076659A KR20010076659A KR20030046200A KR 20030046200 A KR20030046200 A KR 20030046200A KR 1020010076659 A KR1020010076659 A KR 1020010076659A KR 20010076659 A KR20010076659 A KR 20010076659A KR 20030046200 A KR20030046200 A KR 20030046200A
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South Korea
Prior art keywords
groove
tire
heavy load
radial tire
groove structure
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KR1020010076659A
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Korean (ko)
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KR100530157B1 (en
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최준혁
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한국타이어 주식회사
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Priority to KR10-2001-0076659A priority Critical patent/KR100530157B1/en
Publication of KR20030046200A publication Critical patent/KR20030046200A/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
    • B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • B60C11/042—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag further characterised by the groove cross-section
    • 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
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • 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
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
    • B60C2011/1338—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising protrusions

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

Abstract

PURPOSE: A groove structure of a radial tire for pneumatic heavy load is provided to repress a belt bending generated by a stone ejector shape in a curing process, reduce rubber weight, and improve durability by minimizing the width of a bottom surface of a groove. CONSTITUTION: In a tire tread(2) multiplicatively forming a circumferential groove(1) along a circumferential direction, a groove structure of a radial tire for pneumatic heavy load is composed of a circular protruded part(3) formed at a bottom surface of the groove with having a constant diameter(d5) and connected by a connecting protruded part(4) having a diameter(d4).

Description

공기입 중하중용 래디얼 타이어의 그루브구조{Groove Structure of Heavy Load Radial Tire}Groove Structure of Heavy Load Radial Tire

본 발명은 트럭 내지는 버스에 장착되는 공기입 중하중용 래디얼 타이어에 관한 것으로, 더욱 상세하게는 트레드의 그루브 구조를 개선시키어 가류작업시 발생되는 벨트벤딩을 억제시키면서 고무량을 저감하는 공기입 중하중용 래디얼 타이어의 그루브구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic heavy load radial tire mounted on a truck or bus, and more particularly to a pneumatic heavy load radial to reduce the amount of rubber while suppressing belt bending generated during vulcanization by improving the groove structure of the tread. It relates to the groove structure of a tire.

공지된 바와 같이 트럭 내지는 버스에 장착되는 공기입 중하중용 래디얼 타이어에 있어서 도로 및 지면에 접하는 트레드의 그루브에는 작은 돌이나 자갈 등이 물리는 현상을 방지하기 위하여 통상 스톤 이젝터(Stone Ejector) 구조를 갖추고 있는 바, 즉 이는 상기 트레드의 그루브에 돌이나 자갈 등이 물리게 되면, 이 그루브 바닥면을 뚫고 들어가서 빗물 등에 의해서 벨트 층이 녹슬게 될 뿐만 아니라 장기 사용시 벨트 분리현상 등이 야기되는 것을 방지하기 위함이다.As is known, in the pneumatic heavy load radial tire mounted on a truck or a bus, a groove of a tread facing the road and the ground is usually equipped with a stone ejector structure to prevent a small stone or gravel from being bitten. In other words, when the stone or gravel is bitten into the groove of the tread, it penetrates the bottom surface of the groove to prevent the belt layer from rusting due to rainwater and the like, and to prevent the belt separation phenomenon from being caused during long-term use.

종래 이러한 스톤 이젝터는 그루브 바닥면에 도 3a 및 도 3b에 도시된 바와 같이 연속된 띠형상의 구조를 갖는데, 이 때 타이어 가류시 사용되는 모울드의 제조시 연속적인 띠형상의 구조를 유지하기 위하여 모울드 설계시 이 스톤 이젝터 배면폭(d1,d3)은 최소한의 치수(약 2mm이상)가 요구되어 그루브(101)의 배면각도(α1,α2)들이 자연히 작아지게 되고, 가류시 모울드(102)가해지는 고압으로 인해 도 4와 같이 트레드(103)의 그루브(101) 하단부 벨트층(104)이 구부러지는 벨트벤딩 현상이 야기되어 진다.Conventionally, such a stone ejector has a continuous band-like structure on the groove bottom as shown in FIGS. 3A and 3B, in which the mold is used to maintain a continuous band-like structure in the manufacture of the mold used for tire vulcanization. In design, the stone ejector back width (d 1 , d 3 ) requires a minimum dimension (about 2 mm or more), so that the back angles (α 1 , α 2 ) of the groove 101 are naturally reduced, Due to the high pressure applied to the belt 102, a belt bending phenomenon is caused in which the bottom belt layer 104 of the groove 101 of the tread 103 is bent as shown in FIG. 4.

이와 같은 벨트층(104)의 벨트벤딩 현상이 야기되면, 완성된 타이어의 내구성이 저하될 뿐만 아니라 장기 사용시 재생성이 떨어지는 문제점이 있다.When such a belt bending phenomenon of the belt layer 104 is caused, not only the durability of the finished tire is lowered, but also there is a problem in that regeneration is inferior in long-term use.

이에 본 발명은 상기와 같은 종래 문제점을 해결하기 위해 발명된 것으로,원형돌부로 된 스톤 이젝터를 형성시켜 고무의 사용량을 저감시키면서 그루브 배면 각도(α1,α2)를 줄이고 그루부 바닥면 폭을 최소화시켜 가류작업시 벨트 벤딩 현상도 억제시킴에 따라 타이어의 내구성과 재생성 향상이 이루어지는 공기입 중하중용 래디얼 타이어를 제공함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the conventional problems as described above, while reducing the amount of rubber by forming a stone ejector made of a circular protrusion, while reducing the groove back angle (α 1 , α 2 ) and reducing the groove bottom width The purpose is to provide a pneumatic heavy-duty radial tire that minimizes belt bending during vulcanization and improves durability and reproducibility of the tire.

도 1은 본 발명에 따른 중하중용 래디얼 타이어의 트레드부를 확대한 부분 평면도,1 is an enlarged partial plan view of a tread portion of a heavy-duty radial tire according to the present invention;

도 2a 및 도 2b는 도 1의 Ⅰ-Ⅰ선, Ⅱ-Ⅱ선 단면도들,2A and 2B are cross-sectional views taken along lines II and II of FIG. 1;

도 3a는 종래 구조로서, 도 1에 대응되는 부분 평면도,Figure 3a is a conventional structure, a partial plan view corresponding to Figure 1,

도 3b는 도 3의 Ⅲ-Ⅲ선 단면도,3B is a cross-sectional view taken along line III-III of FIG. 3;

도 4는 종래 가류작업시 모울드와 트레드의 관계를 나타낸 부분 단면도이다.4 is a partial cross-sectional view showing the relationship between the mold and the tread during the conventional vulcanization operation.

- 도면의 주요부분에 대한 부호의 설명 --Explanation of symbols for the main parts of the drawings-

1 - 그루브, 2 - 트레드,1-groove, 2-tread,

3 - 원형돌부,4 - 연결돌부,3-circular protrusions, 4-connecting protrusions,

α1,α2- 그루브의 배면각도,d- 그루브폭.back angle of α 1 , α 2 -groove, d-groove width.

상기와 같은 목적을 달성하기 위한 본 발명은 타이어의 원주방향을 따라 원주 그루브들이 형성된 트레드에 있어서, 상기 그루브의 바닥면에는 등간격의 원형돌부들이 형성되고 이 원형돌부들이 연결돌부에 의해 서로 연결되어 있는데, 상기 원형돌부와 연결돌부들은 다음식을 만족시키는 구조로 되어 있다.The present invention for achieving the above object is a tread formed with circumferential grooves in the circumferential direction of the tire, the bottom surface of the groove is formed with equally spaced circular protrusions are formed by the connecting protrusions Is connected, the circular protrusions and the connection protrusions are structured to satisfy the following equation.

P1= 1/10 ~ 1/2PP 1 = 1/10 to 1/2 P

d5/d6= 0.5 ~ 0.95d 5 / d 6 = 0.5 to 0.95

d4= 0.1×d5~ 0.6×d5 d 4 = 0.1 × d 5 to 0.6 × d 5

h-h1= 1/20×h ~ 9/10×hhh 1 = 1/20 × h to 9/10 × h

여기서 P는 타이어 패턴 피치의 크기(mm), d4는 연결돌부의 돌출 바닥면폭, d5는 원형돌부의 바닥면폭, d6는 그루브 바닥면폭, h는 그루브의 깊이, h1은 트레드면과 원형돌부 상단면까지 깊이를 지시한다.Where P is the size of the tire pattern pitch (mm), d 4 is the protrusion bottom width of the connecting protrusion, d 5 is the bottom width of the circular protrusion, d 6 is the groove bottom width, h is the depth of the groove, h 1 is the tread surface and Indicate the depth to the top surface of the circular protrusion.

이하 본 발명을 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 타이어 트레드를 확대한 부분 평면도이고, 도 2a 및도 2b는 도 1의 Ⅰ-Ⅰ선, Ⅱ-Ⅱ선 단면도들이다.1 is an enlarged partial plan view of a tire tread according to the present invention, and FIGS. 2A and 2B are cross-sectional views taken along lines II and II of FIG. 1.

본 발명은 도면에 도시된 바와 같이 타이어의 원주방향을 따라 원주그루브(1)들이 다중으로 형성된 타이어 트레드(2)에 있어서, 상기 그루브(1)의 바닥면에는 일정한 직경(d5)을 갖는 원형돌부(3)들이 등간격으로 형성되고, 이 원형돌부(3)들이 직경(d4)을 갖는 연결돌부(4)에 의해 서로 연결되어 이루어진 구조로 되어 있다.According to the present invention, in the tire tread 2 having a plurality of circumferential grooves 1 formed along the circumferential direction of the tire as shown in the drawing, the bottom surface of the groove 1 has a circular shape having a constant diameter d 5 . The protrusions 3 are formed at equal intervals, and the circular protrusions 3 are connected to each other by the connecting protrusions 4 having the diameter d 4 .

그리고 상기 원형돌부(3)와 연결돌부(4)들은 다음식을 만족시킨 구조로 되어 있다.The circular protrusions 3 and the connection protrusions 4 have a structure satisfying the following equation.

P1= 1/10 ~ 1/2PP 1 = 1/10 to 1/2 P

d5/d6= 0.5 ~ 0.95d 5 / d 6 = 0.5 to 0.95

d4= 0.1×d5~ 0.6×d5 d 4 = 0.1 × d 5 to 0.6 × d 5

h-h1= 1/20×h ~ 9/10×hhh 1 = 1/20 × h to 9/10 × h

(여기서 P는 타이어 패턴 피치의 크기(mm), d4는 연결돌부의 돌출 바닥면폭, d5는 원형돌부의 바닥면폭, d6는 그루브 바닥면폭, h는 그루브의 깊이, h1은 트레드면과 원형돌부 상단면까지 깊이)Where P is the tire pattern pitch (mm), d 4 is the protruding bottom width of the connecting protrusion, d 5 is the bottom width of the circular protrusion, d 6 is the groove bottom width, h is the depth of the groove, and h 1 is the tread surface. And depth up to the top of the round protrusion)

상기와 같이 본 발명의 그루브(1)는 원형돌부(3)들을 아주 얇은 연결돌부(4)로 이어놓는 설계형상을 갖도록 되어 있기 때문에 중하중용 래디얼 타이어에서 돌이나 자갈 등이 물리는 것을 방지하는 기능을 갖으면서 돌출된 층인 연결돌부(4)와원형돌부(3)들의 체적이 작아져 사용되는 고무량을 줄일 수 있도록 되어 있다.As described above, the groove 1 of the present invention is designed to connect the circular protrusions 3 to a very thin connecting protrusion 4, thereby preventing a stone or gravel from being bitten in a heavy tire. The volume of the connecting protrusions 4 and the circular protrusions 3, which are the protruding layers, is small to reduce the amount of rubber used.

또한 본 발명은 그루브(1)의 배면각도(α1,α2)를 조절하여 벨트벤딩 현상을 방지할 수 있는데, 이는 그루브폭(d)이 고정일 경우 바닥면폭(d4,d5) 설계를 조절하여 상기 배면각도(α1,α2)를 변경함으로써 가능하게 된다.In addition, the present invention can prevent the belt bending phenomenon by adjusting the rear angle (α 1 , α 2 ) of the groove 1, which is the bottom width (d 4 , d 5 ) design when the groove width (d) is fixed It is possible to adjust by changing the back angle (α 1 , α 2 ).

따라서 본 발명은 원형돌부(3)의 유효면적을 조정하여 그루브 바닥면에 요구되는 치수를 최소화시킴에 따라 최적의 스톤 이젝터 구조를 갖게 되는 것이다.Therefore, the present invention is to have an optimal stone ejector structure by adjusting the effective area of the circular protrusion 3 to minimize the dimensions required for the groove bottom surface.

상기와 같이 본 발명은 그루브 바닥면 폭을 최소화시켜 사용되는 고무량을 줄여 원가를 절감하면서 그루브의 배면각도를 커지게 하여 가류작업시 발생되는 벨트벤딩 현상을 억제함에 따라 타이어의 내구성도 향상되는 잇점 등이 있다.As described above, the present invention minimizes the width of the groove bottom to reduce the amount of rubber used, thereby reducing the cost and increasing the rear angle of the groove, thereby suppressing the belt bending phenomenon generated during vulcanization, thereby improving the durability of the tire. Etc.

Claims (2)

타이어의 원주방향을 따라 원주그루브(1)들이 다중으로 형성된 타이어 트레드(2)에 있어서,In the tire tread (2) formed with multiple circumferential grooves (1) along the circumferential direction of the tire, 상기 그루브(1)의 바닥면에는 일정한 직경(d5)을 갖는 원형돌부(3)들이 등간격으로 형성되고, 이 원형돌부(3)들이 직경(d4)을 갖는 연결돌부(4)에 의해 서로 연결되어 이루어진 것을 특징으로 하는 공기입 중하중용 래디얼 타이어의 그루브 구조.On the bottom surface of the groove 1, circular protrusions 3 having a constant diameter d 5 are formed at equal intervals, and the circular protrusions 3 are connected by a connecting protrusion 4 having a diameter d 4 . Groove structure of a pneumatic heavy load radial tire, characterized in that made in connection with each other. 제 1항에 있어서, 상기 원형돌부(3)와 연결돌부(4)들은 다음식을 만족한 구조로 이루어진 것을 특징으로 하는 공기입 중하중용 래디얼 타이어의 그루브 구조.The groove structure of claim 1, wherein the circular protrusions (3) and the connecting protrusions (4) have a structure satisfying the following equation. P1= 1/10 ~ 1/2PP 1 = 1/10 to 1/2 P d5/d6= 0.5 ~ 0.95d 5 / d 6 = 0.5 to 0.95 d4= 0.1×d5~ 0.6×d5 d 4 = 0.1 × d 5 to 0.6 × d 5 h-h1= 1/20×h ~ 9/10×hhh 1 = 1/20 × h to 9/10 × h (여기서 P는 타이어 패턴 피치의 크기(mm), d4는 연결돌부의 돌출 바닥면폭, d5는 원형돌부의 바닥면폭, d6는 그루브 바닥면폭, h는 그루브의 깊이, h1은 트레드면과 원형돌부 상단면까지 깊이)Where P is the tire pattern pitch (mm), d 4 is the protruding bottom width of the connecting protrusion, d 5 is the bottom width of the circular protrusion, d 6 is the groove bottom width, h is the depth of the groove, and h 1 is the tread surface. And depth up to the top of the round protrusion)
KR10-2001-0076659A 2001-12-05 2001-12-05 Groove Structure of Heavy Load Radial Tire KR100530157B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108430805A (en) * 2015-12-18 2018-08-21 大陆轮胎德国有限公司 Pneumatic vehicle tire

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Publication number Priority date Publication date Assignee Title
KR200177092Y1 (en) * 1996-08-30 2000-05-01 신형인 Heavy pneumatic tire having projecting stone rejector
JPH1148714A (en) * 1997-07-31 1999-02-23 Bridgestone Corp Pneumatic tire
JPH11189016A (en) * 1997-12-25 1999-07-13 Bridgestone Corp Pneumatic tire
JP4412565B2 (en) * 1999-06-04 2010-02-10 東洋ゴム工業株式会社 Pneumatic tire and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108430805A (en) * 2015-12-18 2018-08-21 大陆轮胎德国有限公司 Pneumatic vehicle tire

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