KR20130050015A - Pneumatic tire for heavy duty vehicle - Google Patents

Pneumatic tire for heavy duty vehicle Download PDF

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Publication number
KR20130050015A
KR20130050015A KR1020110115135A KR20110115135A KR20130050015A KR 20130050015 A KR20130050015 A KR 20130050015A KR 1020110115135 A KR1020110115135 A KR 1020110115135A KR 20110115135 A KR20110115135 A KR 20110115135A KR 20130050015 A KR20130050015 A KR 20130050015A
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KR
South Korea
Prior art keywords
belt
pneumatic tire
carcass
tread
heavy
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KR1020110115135A
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Korean (ko)
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KR101849537B1 (en
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임동규
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한국타이어 주식회사
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Priority to KR1020110115135A priority Critical patent/KR101849537B1/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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/1835—Rubber strips or cushions at the belt edges
    • 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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/1835—Rubber strips or cushions at the belt edges
    • B60C2009/1842—Width or thickness of the strips or cushions

Abstract

PURPOSE: A pneumatic tire for a heavy load is provided to improve durability of a tire with suppression of crack growth by reducing transmission of heat and by suppressing the heat generated from an edge unit of a belt layer. CONSTITUTION: A pneumatic tire for a heavy load comprises a tread(1), a carcass(2), a belt layer(3), and an insulation material(6). The belt layer comprises first, second, and third belts(3a,3b,3c) and is arranged between the tread and the carcass in order to prevent separation phenomenon of the tread and the carcass and to relieve an impact force. The insulation material comprises an air pocket and is inserted into an edge unit(4) of the third belt.

Description

벨트 엣지부의 내구성을 향상시킨 중하중용 공기입 타이어{Pneumatic tire for heavy duty vehicle}Pneumatic tire for heavy duty vehicle which improves durability of belt edge part

본 발명은 벨트층 엣지부의 내구성을 향상시킨 중하중용 공기입 타이어에 관한 것으로, 특히 벨트층의 제 3 벨트 끝단에서 발생하는 엣지 크랙(Edge crack)을 저감시키어 벨트층의 내구성능을 향상시킨 중하중용 타이어에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy-duty pneumatic tire that improves the durability of the belt layer edge portion. In particular, the present invention relates to a heavy load for reducing the edge crack occurring at the end of the third belt of the belt layer to improve the durability of the belt layer. It's about tires.

중하중용 타이어는 일명 TBR타이어(Truck and bus radial tire)라고 칭하며, 이 중하중용 타이어에서 벨트층은 노면에 접하는 고무층인 트레드와 타이어의 골격을 이루는 카카스 사이에 두는 특수 코드층으로 이루어져 있는바, 이에 따라 상기 벨트층은 카카스와 트레드 사이에 배치되어 타이어의 충격력을 완화하는 동시에 트레드에서 발생하는 크랙과 외상이 직접 카카스에 도달하는 것을 방지함과 더불어, 트레드와 카카스가 박리(Separation)되는 것을 방지하는 역할을 수행한다.Heavy-duty tires are called TBR tires (Truck and bus radial tires), and in this heavy-tire tire, the belt layer consists of a special cord layer placed between the tread, which is a rubber layer facing the road, and the carcass that forms the skeleton of the tire. Accordingly, the belt layer is disposed between the carcass and the tread to alleviate the impact force of the tire and at the same time prevent the crack and the trauma from the tread directly reach the carcass, and the tread and carcass are separated (Separation) Serves to prevent this from happening.

이러한 종래 중하중용 공기입 타이어에 있어서 벨트 엣지부의 내구성 개선을 위해 대한민국 공개특허 제10-2002-0046667호는 제 1 벨트와 제 2 벨트 사이의 엣지부에 벨트쿠션을 삽입시키어 타이어의 내구성을 개선시킨 구조이나, 이는 벨트 끝단인 엣지부를 감싸주는 벨트쿠션 재료에서 비틀림(Shear)에 의해 또 다른 박리현상을 야기할 수 있는 문제점이 있었다.In order to improve the durability of the belt edge portion of the conventional heavy-load pneumatic tire, Korean Patent Laid-Open Publication No. 10-2002-0046667 improves the durability of the tire by inserting a belt cushion to the edge portion between the first belt and the second belt. The structure, however, has a problem that may cause another peeling phenomenon by the shear (Shear) in the belt cushion material surrounding the edge portion of the belt end.

이에 본 발명은 상기와 같은 종래 문제점을 감안하여 발명된 것으로, 벨트사고의 주원인인 벨트 엣지부에서 발생하는 크랙발생을 억제하도록 발열 발생을 저감하여 벨트 엣지부의 내구성을 향상시킨 중하중용 공기입 타이어를 제공함에 그 목적이 있다.Accordingly, the present invention has been in view of the above-described conventional problems, and a heavy-load pneumatic tire which improves durability of the belt edge portion by reducing the generation of heat to suppress the occurrence of cracks occurring at the belt edge portion, which is the main cause of the belt accident. The purpose is to provide.

상기와 같은 목적을 달성하기 위한 본 발명은 트레드와 카카스 사이에 배치되어 타이어의 충격력 완화와 트레드와 카카스의 박리현상을 방지하는 제 1 내지 제 3 벨트로 이루어진 벨트층을 갖춘 중하중용 공기입 타이어에 있어서, 상기 벨트층의 제 3 벨트 엣지부에는 공기 포켓으로 이루어진 단열재가 삽입되어 이 제 3 벨트의 엣지부에서 발생하는 발열을 억제하고 전파를 저감시킨 구조로 이루어져 있다.The present invention for achieving the above object is a heavy load pneumatic with a belt layer is disposed between the tread and the carcass, the belt layer consisting of the first to third belts to reduce the impact force of the tire and prevent the separation of the tread and carcass The tire has a structure in which a heat insulating material made of air pockets is inserted into the third belt edge portion of the belt layer to suppress heat generation and reduce radio waves generated at the edge portion of the third belt.

이러한 본 발명에 따른 중하중용 공기입 타이어는 벨트층 끝단인 엣지부에서 발생하는 발열을 억제하고 발생된 발열의 전파도 저감시킴에 따라 크랙 성장의 억제로 타이어의 내구성 향상에 기여할 수가 있다.The heavy-load pneumatic tire according to the present invention can contribute to improving the durability of the tire by suppressing crack growth by suppressing heat generation generated at the edge portion of the belt layer end and reducing propagation of generated heat.

도 1은 본 발명에 따른 중하중용 공기입 타이어의 부분 단면도,
도 2는 본 발명의 요부인 벨트코드와 공기 포켓부의 개략 평면도,
도 3은 도 1의 Ⅰ-Ⅰ선 단면도이다.1 is a partial cross-sectional view of a pneumatic tire for a heavy load according to the present invention,
2 is a schematic plan view of a belt cord and an air pocket part which are main parts of the present invention;
3 is a cross-sectional view taken along the line II of FIG. 1.

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 발명이 적용된 중하중용 공기입 타이어의 부분 단면도로서, 도면에 도시된 바와 같이 본 발명은 트레드(1)와 카카스(2) 사이에 배치되어 타이어의 충격력 완화와 트레드(1)와 카카스(2)의 박리현상을 방지하는 제 1 내지 제 3 벨트(3a,3b,3c)로 이루어진 벨트층(3)을 갖춘 중하중용 공기입 타이어에 있어서, 상기 벨트층(3)의 제 3 벨트(3c) 엣지부(4)에는 공기포켓(5)을 구비한 단열재(6)가 삽입되어 이 제 3 벨트(3c)의 엣지부(4)에서 발생하는 발열을 억제하고 전파를 저감시키도록 되어 있다.1 is a partial cross-sectional view of a heavy-load pneumatic tire to which the present invention is applied. As shown in the drawing, the present invention is disposed between the tread 1 and the carcass 2 to reduce the impact force of the tire and the tread 1 and In a heavy-load pneumatic tire having a belt layer (3) consisting of first to third belts (3a, 3b, 3c) for preventing peeling of the carcass (2), the third of the belt layer (3) Insulating material 6 with air pocket 5 is inserted in the edge portion 4 of the belt 3c so as to suppress the heat generated from the edge portion 4 of the third belt 3c and to reduce radio waves. It is.

즉, 본 발명은 상기 벨트층(3)의 제 3 벨트(3c) 끝단인 엣지부(4)에 공기포켓(5)으로 이루어진 단열재(6)를 삽입 장착시킨 구조인바, 이는 중하중용 공기입 타이어의 제 3 벨트(3c) 엣지부(4) 절단면에서 초기 벨트 엣지 크랙이 발생하여, 이것이 운동하면서 ISS((Interlaminal shear strain)를 발생하고 이로 인해 발열이 증가하여 벨트층 전단사고 등으로 발전하게 되는데, 상기 제 3 벨트(3c)의 벨트코드(7) 직경의 2배 넓이로 공기 포켓(5)을 갖춘 단열재(6)를 삽입시킴에 따라, 상기 제 3 벨트(3c)의 엣지부(4)에서 층간 전단변형에 의해서 발생하는 초기 크랙의 발생을 지연하게 된다.That is, the present invention is a structure in which the heat insulating material 6 made of the air pocket 5 is inserted into the edge portion 4 which is the end of the third belt 3c of the belt layer 3, which is a heavy-load pneumatic tire. An initial belt edge crack occurs at the cutting edge of the third belt 3c of the third belt 3c, which generates an interlaminal shear strain (ISS) as it moves, resulting in an increase in heat generation, resulting in a belt layer shear accident. The edge portion 4 of the third belt 3c is inserted by inserting a heat insulating material 6 having an air pocket 5 twice the diameter of the belt cord 7 of the third belt 3c. This delays the occurrence of initial cracks caused by interlaminar shear deformation at.

따라서 제 3 벨트(3c)의 벨트코드(7) 절단면과 고무와의 접착성이 떨어지는 것을 방지하게 되어, 결국 고무들이 벨트코드(7)의 절단면과 접착되어 제조되는 것이 아니라, 코팅되어 있는 단열재(6)의 면과 접착을 하게 되는 구조로 이루어지기 때문에 제 3 벨트(3c)의 엣지부(4)에서 시작되는 크랙의 성장을 억제할 수 있도록 되어 있다.Therefore, the adhesiveness between the cut surface of the belt cord 7 of the third belt 3c and the rubber is prevented from falling, so that the rubbers are not manufactured by being bonded to the cut surface of the belt cord 7 but instead coated with a heat insulating material ( Since it is made of the structure which adhere | attaches the surface of 6), it becomes possible to suppress the growth of the crack which starts in the edge part 4 of the 3rd belt 3c.

또한, 상기 단열재(6)는 그 내부에 공기가 차 있는 공기포켓(5)이 형성됨에 따라 제 3 벨트(3c)의 끝단인 엣지부(4)의 발열을 억제하고 발생된 발열의 전파도 저감시키도록 되어 있다.In addition, the heat insulating material 6 suppresses the heat generation of the edge portion 4 which is the end of the third belt 3c as the air pocket 5 filled with air is formed therein, and also reduces the propagation rate of the generated heat. It is supposed to be.

상기 단열재(6)는 도 2와 도 3에 도시된 바와 같이 제 3 벨트(3c)의 엣지부(4)에서 벨트코드(7)의 직경만큼 공기포켓(5)이 감싸면서 배치되고 그 단면상의 높이(H)는 벨트코드(7) 직경의 2배 높이로 이루어져 있다.The heat insulating material 6 is arranged while wrapping the air pocket 5 by the diameter of the belt cord 7 at the edge portion 4 of the third belt 3c, as shown in FIGS. 2 and 3. The height H is made up of twice the diameter of the belt cord 7.

따라서 본 발명은 타이어의 벨트층(3)의 주사고인 벨트 엣지부의 박리현상에 근본적 원인인 ISS, 발열, 응력집중, 엣지부 절단면의 비 코팅부에 고무 접착성 저항 등을 차단 또는 저감시킴으로써 타이어의 내구성 향상에 도움을 주도록 되어 있다.Accordingly, the present invention provides a method of preventing tires by blocking or reducing ISS, heat generation, stress concentration, and rubber adhesive resistance on the uncoated portion of the cut edge of the edge, which is a fundamental cause of the peeling phenomenon of the belt edge portion, which is the injection height of the belt layer 3 of the tire. It is intended to help improve durability.

1 : 트레드, 2 : 카카스,
3 : 벨트층, 3a : 제 1 벨트,
3b : 제 2 벨트, 3c : 제 3 벨트,
4 : 엣지(Edge)부, 5 : 공기포켓(Air pocket),
6 : 단열재, 7 : 벨트코드(Cord).1: tread, 2: carcass,
3: belt layer, 3a: first belt,
3b: second belt, 3c: third belt,
4: Edge part, 5: Air pocket,
6: insulation material, 7: cord cord.

Claims (2)

트레드(1)와 카카스(2) 사이에 배치되어 타이어의 충격력 완화와 트레드(1)와 카카스(2)의 박리현상을 방지하는 제 1 내지 제 3 벨트(3a,3b,3c)로 이루어진 벨트층(3)을 갖춘 중하중용 공기입 타이어에 있어서,
상기 벨트층(3)의 제 3 벨트(3c) 엣지부(4)에는 공기포켓(5)을 구비한 단열재(6)가 삽입되어 이 제 3 벨트(3c)의 엣지부(4)에서 발생하는 발열을 억제하고 전파를 저감시키도록 이루어진 것을 특징으로 하는 벨트 엣지부의 내구성을 향상시킨 중하중용 공기입 타이어.The first to third belts (3a, 3b, 3c) disposed between the tread (1) and the carcass (2) to reduce the impact force of the tire and to prevent peeling of the tread (1) and the carcass (2) In the heavy load pneumatic tire provided with the belt layer 3,
The heat insulating material 6 with the air pocket 5 is inserted in the edge part 4 of the 3rd belt 3c of the said belt layer 3, and is produced in the edge part 4 of this 3rd belt 3c. A heavy-load pneumatic tire which improves durability of the belt edge portion, which is configured to suppress heat generation and reduce radio waves. 제 1항에 있어서,
제 3 벨트(3c)의 엣지부(4)에서 벨트코드(7)의 직경만큼 공기포켓(5)이 감싸면서 배치되고 그 단면상의 높이(H)는 벨트코드(7) 직경의 2배 높이로 이루어진 것을 특징으로 하는 벨트 엣지부의 내구성을 향상시킨 중하중용 공기입 타이어.
The method of claim 1,
In the edge portion 4 of the third belt 3c, the air pocket 5 is disposed to cover the diameter of the belt cord 7, and the height H on the cross section is twice as high as the diameter of the belt cord 7. The heavy-duty pneumatic tire which improved durability of the belt edge part characterized by the above-mentioned.
KR1020110115135A 2011-11-07 2011-11-07 Pneumatic tire for heavy duty vehicle KR101849537B1 (en)

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KR101849537B1 KR101849537B1 (en) 2018-04-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160023167A (en) 2014-08-21 2016-03-03 금호타이어 주식회사 Pneumatic tire with inner diffusion of heat
KR20210052932A (en) * 2019-11-01 2021-05-11 넥센타이어 주식회사 Pneumatic tire
KR20220099184A (en) 2021-01-05 2022-07-13 한국타이어앤테크놀로지 주식회사 Tire including cave part for radiation of heat

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3876085B2 (en) * 1998-12-18 2007-01-31 横浜ゴム株式会社 Heavy duty pneumatic radial tire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160023167A (en) 2014-08-21 2016-03-03 금호타이어 주식회사 Pneumatic tire with inner diffusion of heat
KR20210052932A (en) * 2019-11-01 2021-05-11 넥센타이어 주식회사 Pneumatic tire
KR20220099184A (en) 2021-01-05 2022-07-13 한국타이어앤테크놀로지 주식회사 Tire including cave part for radiation of heat

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