KR101164993B1 - Vehicle tire improved bead member - Google Patents

Vehicle tire improved bead member Download PDF

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Publication number
KR101164993B1
KR101164993B1 KR1020090129682A KR20090129682A KR101164993B1 KR 101164993 B1 KR101164993 B1 KR 101164993B1 KR 1020090129682 A KR1020090129682 A KR 1020090129682A KR 20090129682 A KR20090129682 A KR 20090129682A KR 101164993 B1 KR101164993 B1 KR 101164993B1
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KR
South Korea
Prior art keywords
rubber layer
bead
tread
hump
tire
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KR1020090129682A
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Korean (ko)
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KR20110072655A (en
Inventor
신경수
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한국타이어 주식회사
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Priority to KR1020090129682A priority Critical patent/KR101164993B1/en
Publication of KR20110072655A publication Critical patent/KR20110072655A/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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C2015/0617—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber
    • B60C2015/0625—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber provided at the terminal edge portion of a carcass or reinforcing layer
    • 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/065—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer at the axially outer side of the carcass turn-up portion not wrapped around the bead core
    • 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
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C2015/0678—Physical properties of the bead reinforcing layer, e.g. modulus of the ply
    • 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
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/04—Tyres specially adapted for particular applications for road vehicles, e.g. passenger cars

Abstract

본 발명은 특히, 비드부를 개량하여서 된 자동차용 타이어에 관한 것으로, 트레드(1)와 트레드(1) 양측의 사이드월(2) 및 사이드월(2) 양단의 비드부(3)로 구성되고, 비드부(3)의 외면에 험프스트립(4)을 설치하여서 되는 자동차용 타이어에 있어서, 본 발명은, 험프스트립(4)과 사이드월(2)단부의 사이드월고무층(21) 사이에 완충고무층(5)을 설치하여, 험프스트립과 사이드월고무층 사이의 경계면에서, 물성차이로 인한 크랙 발생 염려를 크게 완화시킬 수 있게 한 것임.In particular, the present invention relates to a tire for an automobile in which the bead portion is improved, and includes a tread 1, sidewalls 2 on both sides of the tread 1, and bead portions 3 on both ends of the sidewalls, In an automobile tire in which a hump strip 4 is provided on an outer surface of the bead portion 3, the present invention provides a cushioning rubber layer between the hump strip 4 and the side wall rubber layer 21 at the end of the side wall 2. By installing (5), it is possible to greatly reduce the possibility of cracking due to the property difference at the interface between the hump strip and the sidewall rubber layer.

타이어, 비드부, 비드부 크랙, 험프스트립 Tires, Bead Parts, Bead Cracks, Hump Strips

Description

비드부를 개량한 자동차용 타이어{Vehicle tire improved bead member}Vehicle tire improved bead member

본 발명은 자동차용 타이어에 관한 것으로 특히, 비드부를 개량하여서 된 자동차용 타이어에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to automobile tires and, more particularly, to automobile tires by improving bead portions.

타이어는 물리적 및 화학적 성분이 서로 다른 반제품들을 결합하여 구성되는 바, 타이어를 구성하는 위와 같은 반제품들은 물리, 화학적 성질의 차이로 인하여 시간이 지남에 따라 그 결합 부위에서 세파레이션이 발생할 염려가 있다.      Tires are composed of a combination of semi-finished products with different physical and chemical components, and the semi-finished products constituting the tire are likely to cause separation at the bonding site over time due to differences in physical and chemical properties.

일반적으로 타이어는 사용조건에 따라 승용차용과 트럭 버스용 타이어로 크게 나뉘는데 여기서는 트럭 버스용 타이어를 예로 들어 설명한다.      Generally, tires are divided into tires for passenger cars and truck buses according to conditions of use. Here, the tires for truck buses will be described as an example.

알려진 바와 같이 타이어는 노면과 직접 접촉하여 자동차의 자체와 지면 사이에서 자체의 구동력을 전달하고 지면으로부터 충격을 흡수, 완화하는 완충 역할도 겸하고 있다. 현재 다양한 타이어중 트럭버스용 타이어는 고압, 고하중의 가혹한 사용조건에 견딜수 있도록 일반 승용차용 타이어 보다 복잡한 구조, 내구성능을 확보하기 위해 각종 보강구조로 이루어져 있다. 그 중 타이어와 림이 접촉하는 부위 의 고무조성물을 험프스트립이라 하는데 험프스트립은 휠의 림부와 직접 접촉하여 주행 중 브레이크 드럼의 고온의 열이 그대로 전달되기 때문에 내열성이 우수해야 하고 림과의 마찰로 인한 손상을 방지하기 위해 내마모성이 우수한 고경도의 고무가 사용되고 있다.      As is known, tires are also in direct contact with the road surface, transmitting their driving force between the car itself and the ground and acting as a shock absorber to absorb and mitigate shocks from the ground. Currently, tires for truck buses among various tires are composed of various reinforcement structures to ensure more complicated structure and durability than general passenger car tires to withstand the severe use conditions of high pressure and high load. Among them, the rubber composition in the area where the tire and the rim come into contact with each other is called a hump strip. The hump strip should be in direct contact with the rim of the wheel so that the high temperature heat of the brake drum is transmitted as it is running. In order to prevent damage caused by high hardness rubber with excellent wear resistance is used.

위와 같은 험프스트립은 그 상단부가 사이드월과 접하게 되는데, 사이드월은 외부에 타이어의 부위 중에서 외부에 가장 많이 노출되어 있으므로 내피로균열성과 내찢김성등 기게적 물성이 우수해야 하고 햇빛에 많이 노출되므로 산소 및 오존 등에 대한 내산화성, 내환 경성이 우수하도록 노화방지제가 첨가된다. 또한 자동차의 구동토크를 노면에 전달하고 트레드부의 충격을 흡수 완충하는 역할을 하기 때문에 적당한 강성이 있으면서 내굴곡 피로성이 우수한 고무가 사용되고 있다.     As the upper hump strip is in contact with the sidewall, the sidewall is most exposed to the outside of the tires on the outside, so the mechanical properties such as fatigue cracking and tearing resistance should be excellent and exposed to sunlight. An anti-aging agent is added so as to be excellent in oxidation resistance and environmental resistance to oxygen and ozone. In addition, since the driving torque of the vehicle is transmitted to the road surface and absorbs and cushions the impact of the tread part, a rubber having moderate flexural strength and excellent bending fatigue resistance is used.

상기와 같이 경질의 험프스트립과 연질의 사이드월고무부는 물성의 차이로 인한 접착강도의 저하로 인해 이 두 고무의 접촉부위인 사이드월 하단부의 림체크라인 윗부분에서 원주방향으로 크랙(Crack)이 빈번하게 발생하고 있다. 이러한 크랙은 타이어 내부의 결함이나 파괴로 인한 크랙이나 세퍼레이션과는 달리 비드부 내부로 진전되지 아니하여 타이어의 성능에 나쁜 영향을 주지는 아니하나 외관상 보기에 좋지 않고 일반인들은 이러한 크랙을 타이어의 불량이나 결함으로 보기 쉽다는 문제점이 있었다.      As described above, the hard hump strips and the soft sidewall rubber parts have frequent cracks in the circumferential direction at the upper part of the rim check line at the bottom of the sidewalls, which are the contact parts of the two rubbers, due to the decrease in the adhesive strength due to the difference in physical properties. Is happening. Unlike cracks or separations caused by defects or breakages in the tires, such cracks do not progress inside the bead, which does not adversely affect the performance of the tires. There was a problem that it was easy to see it as a defect.

이에, 본 발명은, 험프스트립과 사이드월의 접합부 사이에서 크랙이 발생되지 아니하게 하여 타이어의 외관 불량 현상을 해소하여야 한다는 과제를 해결하고자 한다.     Accordingly, the present invention is intended to solve the problem that the appearance defect of the tire should be eliminated by preventing cracks from occurring between the joint portions of the hump strips and the sidewalls.

위와 같은 과제를 해결하기 위하여 본 발명은 트레드와 트레드 양측의 사이드월 및 사이드월 양단의 비드부로 구성되고, 비드부의 외면에 험프스트립을 설치하여서 되는 자동차용 타이어에 있어서, 험프스트립과 사이드월단부 사이에 완충고무층을 설치하여서 되는 자동차용 타이어를 제공한다.In order to solve the above problems, the present invention is composed of a tread and sidewalls on both sides of the tread and bead portions at both ends of the tread, and in a vehicle tire in which a hump strip is installed on an outer surface of the bead portion, between the hump strip and the sidewall end portions. Provided is a tire for an automobile provided with a cushioning rubber layer.

위와 같은 본 발명의 타이어는 험프스트립과 완충고무층, 및 완충고무층과 사이드월고무층 사이의 물성차이가 완화되어 그 경계면에서의 크랙 발생 염려를 크게 완화시킬 수 있는 효과가 있다. 즉, 험프스트립과 완충고무층 및 사이드월고무층의 경계면에서는 그 고무 물성의 차이가 적어지게 되어 가황시 인접하는 고무층 사이의 고무 흐름이 원활하게되어 인접하는 고무층 간에 서로 구분됨이 없이 일체로 결합되어 경계면에서의 크랙 염려를 크게 해소할 수 잇게 되는 효과를 가진다.As described above, the tire of the present invention has an effect that the physical property difference between the hump strip and the buffer rubber layer, and the buffer rubber layer and the side wall rubber layer is alleviated, thereby greatly reducing the risk of cracking at the interface. In other words, the difference between the rubber properties of the hump strip and the buffer rubber layer and the side wall rubber layer becomes smaller, and when vulcanized, the rubber flow between the adjacent rubber layers is smooth, and the adjacent rubber layers are integrally combined without being separated from each other. It has an effect that can greatly eliminate crack concerns.

트레드(1)와 트레드(1) 양측의 사이드월(2) 및 사이드월(2) 양단의 비드부(3)로 구성되고, 비드부(3)의 외면에 험프스트립(4)을 설치하여서 되는 자동차용 타이어에 있어서, 본 발명은, 험프스트립(4)과 사이드월(2)단부의 사이드월고무층(21) 사이에 완충고무층(5)을 설치하여서 되는 자동차용 타이어를 제공한다.The tread 1, sidewalls 2 on both sides of the tread 1, and bead portions 3 on both ends of the sidewalls 2, and a hump strip 4 is provided on the outer surface of the bead portion 3 In an automobile tire, the present invention provides an automobile tire in which a buffer rubber layer 5 is provided between a hump strip 4 and a side wall rubber layer 21 at the end of the side wall 2.

완충고무층(5)은, 예컨대, 사이드월고무층(21)의 모듈러스가 45~65이고 험프스트립(4)의 모듈러스가 140~160인 경우, 모듈러스가 90~110이 되게 형성시킨다.For example, when the modulus of the sidewall rubber layer 21 is 45 to 65 and the hump strip 4 has a modulus of 140 to 160, the buffer rubber layer 5 is formed to have a modulus of 90 to 110.

완충고무층(5)은 사이드월고무층과 험프스트립의 직접적 연결을 차단하는 것이므로 그 형상에 어떤 제한을 받을 바 아니다. 따라서 본 발명의 완충고무층은 첨부된 도면 도1 또는 도2와 같이 임의 형상으로 형성시킬 수 있다. Since the buffer rubber layer 5 blocks the direct connection between the sidewall rubber layer and the hump strip, the shape of the buffer layer 5 is not limited. Therefore, the buffer rubber layer of the present invention can be formed in any shape as shown in FIG.

도1은 본 발명의 일 실시예의 요부 발췌 단면도1 is a cross-sectional view of the main portion of an embodiment of the present invention

도2는 본 발명의 다른 실시예의 요부 발췌 단면도Figure 2 is a cross-sectional view of the main portion of another embodiment of the present invention

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1. 트레드1. Tread

2. 사이드월2. Sidewall

21. 사이드월고무층 21. Sidewall Rubber Layer

3. 비드부3. Bead part

4. 험프스트립4. Hump Strip

5. 완충고무층5. Buffer rubber layer

Claims (2)

트레드와 트레드 양측의 사이드월 및 사이드월 양단의 비드부로 구성되고, 비드부의 외면에 험프스트립을 설치하여서 되는 자동차용 타이어에 있어서, 험프스트립과 사이드월단부 사이에 완충고무층을 설치하여서 되는 것을 특징으로 하는 비드부를 개량한 자동차용 타이어.An automobile tire composed of a tread, sidewalls on both sides of the tread, and bead portions at both ends of the tread, and a hump strip provided on an outer surface of the bead portion, wherein a cushioning rubber layer is provided between the hump strip and the sidewall ends. Automobile tire which improved bead part to say. 제1항에 있어서, 사이드월고무층의 모듈러스가 45~65이고 험프스트립의 모듈러스가 140~160이며, 완충고무층의 모듈러스가 90~110인 것을 특징으로 하는 비드부를 개량한 자동차용 타이어.The vehicle tire of claim 1, wherein the modulus of the sidewall rubber layer is 45 to 65, the modulus of the hump strip is 140 to 160, and the modulus of the buffer rubber layer is 90 to 110.
KR1020090129682A 2009-12-23 2009-12-23 Vehicle tire improved bead member KR101164993B1 (en)

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KR102204855B1 (en) * 2019-04-16 2021-01-20 한국타이어앤테크놀로지 주식회사 Pneumatic tire with bead filler applied with multiple rubber layer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100493661B1 (en) 2000-12-19 2005-06-03 한국타이어 주식회사 Pneumatic tire for heavy duty vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100493661B1 (en) 2000-12-19 2005-06-03 한국타이어 주식회사 Pneumatic tire for heavy duty vehicle

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