KR20010053665A - Radial Tire Having Asymmetrical Cross Section - Google Patents

Radial Tire Having Asymmetrical Cross Section Download PDF

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Publication number
KR20010053665A
KR20010053665A KR1019990054113A KR19990054113A KR20010053665A KR 20010053665 A KR20010053665 A KR 20010053665A KR 1019990054113 A KR1019990054113 A KR 1019990054113A KR 19990054113 A KR19990054113 A KR 19990054113A KR 20010053665 A KR20010053665 A KR 20010053665A
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KR
South Korea
Prior art keywords
tire
cross
carcass
vehicle
radial tire
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Application number
KR1019990054113A
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Korean (ko)
Inventor
서종환
Original Assignee
조충환
한국타이어 주식회사
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Priority to KR1019990054113A priority Critical patent/KR20010053665A/en
Publication of KR20010053665A publication Critical patent/KR20010053665A/en

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Classifications

    • 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
    • B60C3/00—Tyres characterised by the transverse section
    • B60C3/06—Tyres characterised by the transverse section asymmetric
    • 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
    • B60C9/02—Carcasses
    • B60C9/0292—Carcass ply curvature
    • 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
    • B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
    • B60C2011/0016—Physical properties or dimensions
    • B60C2011/0033—Thickness of the tread

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

Abstract

PURPOSE: A radial tire is provided to improve control safety of the tire in a rotary motion of a vehicle by differently forming section of thread units of the inside and outside, and to reduce fuel expenses by improving rotation resistance performance. CONSTITUTION: A radial tire piles up plural belts(3) on an upper face of a carcass(2) while turning up carcass ply to a bead unit(1). The radial tire asymmetrically forms curvature of the carcass based on a central line of a tire(10) in a pneumatic pressure tire of asymmetric shape in a section shape of a sidewall unit(5). A sectional area(A2) mounted inside of a thread unit is differently formed with a sectional area(A1) mounted outside of the thread unit. Thereby, control safety of the tire is increased and rotation resistance performance is improved.

Description

비대칭 단면형상을 갖는 래디얼 타이어 {Radial Tire Having Asymmetrical Cross Section}Radial Tire Having Asymmetrical Cross Section

본 발명은 소하중용 승용차의 직진 및 회전운동시 회전저항성능을 향상시킬수 있도록 된 공기입 래디얼 타이어에 관한 것으로, 특히 차량의 내측과 외측으로 구분되는 사이드월부가 비대칭 단면형상을 갖는 래디얼 타이어에서, 내측과 외측의 트레드부의 단면적을 다르게 형성시켜 차량의 회전운동시 타이어의 조종안정성을 향상시킴과 더불어 회전저항을 줄일 수 있도록 하는 비대칭 단면형상을 갖는 래디얼 타이어에 관한 것이다.The present invention relates to a pneumatic radial tire that is capable of improving the rotational resistance performance during straight and rotational movement of a small-load passenger car, in particular in a radial tire having a sidewall portion divided into an inner side and an outer side of a vehicle having an asymmetric cross-sectional shape. The present invention relates to a radial tire having an asymmetrical cross-sectional shape that forms a different cross-sectional area of the tread portion from the outside to improve the steering stability of the tire during the rotational movement of the vehicle and to reduce the rolling resistance.

도 3은 사이드월부가 비대칭 단면형상을 갖는 래디얼 타이어의 단면도로서, 종래에는 도 3에 도시된 바와 같이 차량의 외측에 위치하는 사이드월부(5)의 최대 단면거리를 크게 형성시키는 한편, 차량의 내측에 위치하는 사이드월부(5')의 최대 단면거리는 상기 외측의 최대 단면거리보다 작게 형성시켰다. 이에 따라, 내측의 사이드월부(5')의 곡률들(R2,R4)이 각각 외측의 사이드월부(5)의 곡률들(R1,R3)보다 크게 형성되어 외측의 사이드월부(5)의 강성이 내측의 사이드월부(5')의 강성보다 작게 되게 하고, 차량의 회전운동시 발생하는 방향전환력(cornering force)을 접지면내에 균일하게 분포시킴으로써 접지면적을 극대화하여 조종안정성을 향상시키도록 되어 있다.FIG. 3 is a cross-sectional view of a radial tire having a sidewall portion having an asymmetrical cross-sectional shape. In the related art, a maximum cross-sectional distance of a sidewall portion 5 positioned outside the vehicle as shown in FIG. The maximum cross-sectional distance of the side wall portion 5 'positioned at is smaller than the outer maximum cross-sectional distance. Accordingly, the curvatures R2 and R4 of the inner sidewall portion 5 'are formed larger than the curvatures R1 and R3 of the outer sidewall portion 5, respectively, so that the rigidity of the outer sidewall portion 5 is increased. It is made to be smaller than the stiffness of the inner sidewall portion 5 'and distributes the turning force generated during the rotational movement of the vehicle uniformly in the ground plane to maximize the ground area to improve the steering stability. .

그러나, 전술한 바와 같이 조종안정성을 향상시키기 위한 비대칭 단면형상을 갖는 타이어는 차량에서의 내측과 외측이 구분되기 때문에 외측에 해당하는 트레드부는 내측에 해당하는 트레드부에 비해 많은 변형이 발생하고, 이로 인하여 대칭인 단면형상을 갖는 타이어보다 회전저항성능에 불리하게 작용하는 문제점이 있었다.However, since the tire having an asymmetric cross-sectional shape for improving steering stability as described above is distinguished from the inside and the outside of the vehicle, the tread portion corresponding to the outside is more deformed than the tread portion corresponding to the inside. Due to this, there was a problem in that the tire had a disadvantageous effect on the rolling resistance performance than the symmetrical cross-sectional shape.

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 내측과 외측의 트레드부의 단면적을 다르게 형성시켜 차량의 회전운동시 타이어의 조종안정성을 향상시킴과 더불어 회전저항성능을 향상시킴으로써, 차량의 연비를 감소시킬 수 있도록 된 비대칭 단면형상을 갖는 래디얼 타이어를 제공하는 데에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, by forming a cross-sectional area of the tread portion of the inner and outer sides to improve the steering stability of the tire during the rotational movement of the vehicle and to improve the rolling resistance performance of the vehicle, It is an object of the present invention to provide a radial tire having an asymmetrical cross-sectional shape that is capable of reducing fuel economy.

도 1은 트레드부의 카카스 곡률이 비대칭 단면형상을 갖는 본 발명에 따른 래디얼 타이어의 단면도이고,1 is a cross-sectional view of a radial tire according to the present invention in which the carcass curvature of the tread portion has an asymmetric cross-sectional shape,

도 2는 래디얼 타이어의 반제품들이 회전저항에 미치는 기여도에 대한 예측결과를 나타낸 그래프,Figure 2 is a graph showing the prediction result for the contribution of the semi-finished products of the radial tire on the rolling resistance,

도 3은 사이드월부가 비대칭 단면형상을 갖는 래디얼 타이어의 단면도이다.3 is a cross-sectional view of a radial tire having a sidewall portion having an asymmetrical cross-sectional shape.

1 : 비드부 2 : 카카스1: bead part 2: carcass

3 : 벨트 4 : 트레드부3: belt 4: tread section

5 : 사이드월부 10 : 래디얼 타이어5: Sidewall 10: Radial Tire

상기와 같은 목적을 달성하기 위한 본 발명은, 비드부에 카카스 플라이 (carcass ply)를 턴업(turn-up)시키면서 카카스의 상부면에 다수의 벨트를 적층시켜 형성되는 한편, 사이드월부의 단면형상이 비대칭인 공기입 타이어에 있어서, 카카스의 곡률을 타이어의 중심선을 기준으로 하여 좌우가 비대칭을 이루도록 형성됨과 더불어, 차량의 내측과 외측에 해당하는 트레드부의 단면적이 다르게 되도록 형성됨으로써 이루어진다.The present invention for achieving the above object is formed by laminating a plurality of belts on the upper surface of the carcass while turning up the carcass ply on the bead portion, In pneumatic tires having asymmetrical shapes, the curvature of the carcass is formed to be asymmetrical with respect to the center line of the tire, and the cross-sectional areas of the tread portions corresponding to the inside and the outside of the vehicle are different from each other.

이하, 본 발명을 첨부도면을 참조로 하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 트레드부의 카카스 곡률이 비대칭 단면형상을 갖는 본 발명에 따른 래디얼 타이어의 단면도로서, 도 1에 도시된 바와 같이 본 발명에 따른 래디얼 타이어(10)는 비드부(1)에 카카스 플라이가 턴업되어 있고, 카카스(2)의 상부면에는 다수의 벨트(3)가 적층되어 있는데, 타이어의 사이드월부(5)의 단면형상은 비대칭 형상을 갖도록 되어 있다.1 is a cross-sectional view of a radial tire according to the present invention in which the carcass curvature of the tread part has an asymmetrical cross-sectional shape. As shown in FIG. 1, the radial tire 10 according to the present invention is a carcass ply on the bead part 1. Is turned up, and a plurality of belts 3 are stacked on the upper surface of the carcass 2, but the cross-sectional shape of the sidewall portion 5 of the tire is to have an asymmetrical shape.

한편, 도 2는 래디얼 타이어의 반제품들이 회전저항에 미치는 기여도에 대한예측결과를 나타낸 그래프로서, 도 2에 도시된 바와 같이 타이어의 반제품에서는 트레드부가 회전저항에 대해 약 50%의 기여도를 갖게 되는데, 즉 카카스 토핑 (topping)고무나, 벨트 토핑고무, 비드 필러, 사이드월부 등 보다 크게 회전저항에 기여하고 있음을 예측할 수 있다. 또한, 비대칭 단면형상을 갖는 타이어에서는 차량의 외측에 해당하는 트레드부가 차량의 내측에 해당하는 트레드부보다 더 많은 변형이 발생하게 되는데, 이는 회전저항성능을 저하시키는 원인이 되고 있다.On the other hand, Figure 2 is a graph showing the result of the contribution of the semi-finished products of the radial tire on the rolling resistance, as shown in Figure 2, the tread portion of the semi-finished product of the tire has a contribution of about 50% to the rolling resistance, In other words, it can be expected that the carcass topping rubber, belt topping rubber, bead filler, sidewall portion, and the like contribute significantly to the rotational resistance. In addition, in the tire having an asymmetrical cross-sectional shape, the tread portion corresponding to the outside of the vehicle generates more deformation than the tread portion corresponding to the inside of the vehicle, which causes a decrease in the rolling resistance performance.

따라서, 타이어(10)의 중심선으로부터 트레드부(4)의 카카스(2) 곡률 중 외측의 곡률(R1)을 내측의 곡률(R2)보다 10% ~ 100% 정도 크게 되도록 형성시켜, 외측 트레드부의 단면적(A1)이 내측 트레드부의 단면적(A2)보다 10% ~ 60% 정도 작게 되도록 형성한다.Therefore, the outer curvature R1 of the carcass 2 curvature of the tread portion 4 is formed to be about 10% to 100% larger than the inner curvature R2 from the center line of the tire 10, and the outer tread portion The cross-sectional area A1 is formed to be about 10% to 60% smaller than the cross-sectional area A2 of the inner tread portion.

이에 의해, 비대칭 단면형상을 갖는 공기입 타이어의 조종안정성에 영향을 끼치지 않으면서도 회전저항을 줄일 수 있게 된다.As a result, the rolling resistance can be reduced without affecting the steering stability of the pneumatic tire having the asymmetrical cross-sectional shape.

이상과 같이 본 발명에 의하면, 차량의 회전운동시 타이어의 조종안정성을 향상시킴과 더불어 회전저항성능을 향상시킴으로써, 차량의 연비를 감소시킬 수 있도록 경제적인 효과가 있게 된다.According to the present invention as described above, by improving the steering stability of the tire during the rotational movement of the vehicle and by improving the rotational resistance performance, there is an economical effect to reduce the fuel economy of the vehicle.

Claims (3)

비드부(1)에 카카스 플라이가 턴업되어 있고 카카스(2)의 상부면에는 다수의 벨트(3)를 적층하여 형성시킨 한편, 사이드월부(5)의 단면형상이 비대칭인 공기입 타이어(10)에 있어서,A pneumatic tire whose carcass ply is turned up on the bead part 1 and a plurality of belts 3 are formed on the upper surface of the carcass 2 by lamination, while the cross-sectional shape of the sidewall part 5 is asymmetric ( 10), 상기 카카스(2)의 곡률은 타이어(10)의 중심선을 기준으로 하여 좌우가 비대칭을 이루도록 형성됨과 더불어, 차량의 내측에 해당하는 트레드부의 단면적(A2)과 외측에 해당하는 트레드부의 단면적(A1)은 다르게 되도록 형성된 것을 특징으로 하는 비대칭 단면형상을 갖는 래디얼 타이어.The curvature of the carcass 2 is formed to be asymmetrical with respect to the center line of the tire 10, and the cross-sectional area A2 of the tread part corresponding to the inside of the vehicle and the cross-sectional area A1 of the tread part corresponding to the outside of the tire 10. ) Is a radial tire having an asymmetrical cross-sectional shape, characterized in that it is formed to be different. 제 1항에 있어서, 상기 타이어(10)의 중심선으로부터 차량의 외측에 해당하는 트레드부의 카카스 곡률(R1)은 차량의 내측에 해당하는 트레드부의 카카스 곡률 (R2)보다 10% ~ 100% 크게 형성된 것을 특징으로 하는 비대칭 단면형상을 갖는 래디얼 타이어.2. The carcass curvature R1 of the tread portion corresponding to the outside of the vehicle from the centerline of the tire 10 is 10% to 100% greater than the carcass curvature R2 of the tread portion corresponding to the inside of the vehicle. A radial tire having an asymmetric cross-sectional shape, characterized in that formed. 제 1항에 있어서, 상기 차량의 외측에 해당하는 트레드부의 단면적(A1)은 차량의 내측에 해당하는 트레드부의 단면적(A2)보다 10% ~ 60% 작게 형성된 것을 특징으로 하는 비대칭 단면형상을 갖는 래디얼 타이어.The radial section having an asymmetric cross-sectional shape of claim 1, wherein the cross-sectional area A1 of the tread part corresponding to the outside of the vehicle is 10% to 60% smaller than the cross-sectional area A2 of the tread part corresponding to the inside of the vehicle. tire.
KR1019990054113A 1999-12-01 1999-12-01 Radial Tire Having Asymmetrical Cross Section KR20010053665A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62103204A (en) * 1985-07-10 1987-05-13 Bridgestone Corp Heavy load pneumatic type
JPS63170104A (en) * 1986-12-30 1988-07-14 Yokohama Rubber Co Ltd:The Pneumatic radial tire
JPH04283104A (en) * 1991-03-11 1992-10-08 Mazda Motor Corp Tire wheel structure of vehicle
JPH05139109A (en) * 1991-11-20 1993-06-08 Bridgestone Corp Different diameter bead tire
JPH06135204A (en) * 1992-10-23 1994-05-17 Bridgestone Corp Pneumatic tire
KR19980083605A (en) * 1997-05-16 1998-12-05 홍건희 Pneumatic tires for improved ride comfort and handing performance
JPH11321245A (en) * 1998-05-13 1999-11-24 Toyo Tire & Rubber Co Ltd Pneumatic radial tire
KR20010001505A (en) * 1999-06-04 2001-01-05 조충환 Pneumatic tire having improved durability

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62103204A (en) * 1985-07-10 1987-05-13 Bridgestone Corp Heavy load pneumatic type
JPS63170104A (en) * 1986-12-30 1988-07-14 Yokohama Rubber Co Ltd:The Pneumatic radial tire
JPH04283104A (en) * 1991-03-11 1992-10-08 Mazda Motor Corp Tire wheel structure of vehicle
JPH05139109A (en) * 1991-11-20 1993-06-08 Bridgestone Corp Different diameter bead tire
JPH06135204A (en) * 1992-10-23 1994-05-17 Bridgestone Corp Pneumatic tire
KR19980083605A (en) * 1997-05-16 1998-12-05 홍건희 Pneumatic tires for improved ride comfort and handing performance
JPH11321245A (en) * 1998-05-13 1999-11-24 Toyo Tire & Rubber Co Ltd Pneumatic radial tire
KR20010001505A (en) * 1999-06-04 2001-01-05 조충환 Pneumatic tire having improved durability

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