WO2022210943A1 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- WO2022210943A1 WO2022210943A1 PCT/JP2022/016197 JP2022016197W WO2022210943A1 WO 2022210943 A1 WO2022210943 A1 WO 2022210943A1 JP 2022016197 W JP2022016197 W JP 2022016197W WO 2022210943 A1 WO2022210943 A1 WO 2022210943A1
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- WIPO (PCT)
- Prior art keywords
- tire
- carcass
- belt
- range
- layer
- Prior art date
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- 229920001971 elastomer Polymers 0.000 claims abstract description 130
- 239000005060 rubber Substances 0.000 claims abstract description 129
- 239000011248 coating agent Substances 0.000 claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 37
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- LDVVMCZRFWMZSG-OLQVQODUSA-N (3ar,7as)-2-(trichloromethylsulfanyl)-3a,4,7,7a-tetrahydroisoindole-1,3-dione Chemical compound C1C=CC[C@H]2C(=O)N(SC(Cl)(Cl)Cl)C(=O)[C@H]21 LDVVMCZRFWMZSG-OLQVQODUSA-N 0.000 description 1
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Images
Classifications
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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
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C9/08—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship the cords extend transversely from bead to bead, i.e. radial 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0042—Reinforcements made of synthetic materials
-
- 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
- B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
- B60C15/0036—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion with high ply turn-up, i.e. folded around the bead core and terminating radially above the point of maximum section width
-
- 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
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
-
- 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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
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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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
- B60C9/2009—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords comprising plies of different materials
-
- 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
- B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
- B60C2009/0085—Tensile strength
-
- 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
- B60C2009/0269—Physical properties or dimensions of the carcass coating rubber
- B60C2009/0276—Modulus; Hardness; Loss modulus or "tangens delta"
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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
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- B60C2009/0269—Physical properties or dimensions of the carcass coating rubber
- B60C2009/0284—Thickness
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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
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- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0425—Diameters of the cords; Linear density thereof
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- 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
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0441—Density in width direction
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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
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/045—Tensile strength
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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
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0458—Elongation of the reinforcements at break point
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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
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0475—Particular materials of the carcass cords
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2012—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel with particular configuration of the belt cords in the respective belt layers
- B60C2009/2022—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel with particular configuration of the belt cords in the respective belt layers comprising cords at an angle of 60 to 90 degrees to the circumferential direction
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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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2061—Physical properties or dimensions of the belt coating rubber
- B60C2009/2064—Modulus; Hardness; Loss modulus or "tangens delta"
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2061—Physical properties or dimensions of the belt coating rubber
- B60C2009/2067—Thickness
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2074—Physical properties or dimension of the belt cord
- B60C2009/2077—Diameters of the cords; Linear density thereof
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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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2074—Physical properties or dimension of the belt cord
- B60C2009/209—Tensile strength
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2074—Physical properties or dimension of the belt cord
- B60C2009/2093—Elongation of the reinforcements at break point
Definitions
- a belt cover 143 is arranged to cover the entire area of the cross belts 141 and 142, and a pair of belt edge covers 144 and 144 are arranged to cover the left and right edge portions of the cross belts 141 and 142 from outside in the tire radial direction.
- the difference in rubber hardness Hs_cap-Hs_ut is in the range of 3 or more and 20 or less, preferably in the range of 5 or more and 15 or less.
- the modulus difference M_cap ⁇ M_ut [MPa] is in the range of 0 to 1.4, preferably in the range of 0.1 to 1.0.
- the loss tangent difference tan ⁇ _cap ⁇ tan ⁇ _ut is in the range of 0 or more and 0.22 or less, preferably 0.02 or more and 0.16 or less.
- the total cross-sectional area ⁇ bd [mm ⁇ 2] of the steel bead wires described above is 0.025 ⁇ ⁇ bd/OD ⁇ 0.025 ⁇ ⁇ bd/OD ⁇ It is in the range of 0.075, preferably in the range of 0.030 ⁇ bd/OD ⁇ 0.065.
- the total cross-sectional area ⁇ bd [mm ⁇ 2] of the bead wires is in the range of 11 ⁇ bd ⁇ 36, preferably in the range of 13 ⁇ bd ⁇ 33.
- both of the two carcass plies 13A and 13B are wound outward in the tire width direction so as to wrap the bead core 11 .
- the wound-up portion 132 of the carcass ply 13A on the inner diameter side covers the radially outer end (reference numerals omitted in the figure) of the wound-up portion 132 of the carcass ply 13B on the outer diameter side from the outside in the tire width direction.
- the radially outer end of the winding portion 132 of the carcass ply 13A on the inner diameter side (the reference numerals are omitted in the drawing) is located between the tire maximum width position Ac and the end of the belt layer 14 (point Au, which will be described later).
- the strength of the single twisted belt cord is measured to calculate the strength Tbt of the belt ply.
- the belt layer 14 is formed by laminating a plurality of effective carcass plies (see FIG. 1)
- the strength Tbt described above is defined for each of the plurality of effective carcass plies.
- the pair of cross belts 141, 142, belt cover 143 and additional belt 145 correspond to effective belt plies.
- the tire profile is the contour line of the tire in a cross-sectional view in the tire meridian direction, and is measured using a laser profiler.
- a laser profiler for example, a tire profile measuring device (manufactured by Matsuo Co., Ltd.) is used.
- the rubber gauge of the tread rubber 15 is defined as the distance from the tread profile to the inner peripheral surface of the tread rubber 15 (the distance from the outer peripheral surface of the cap tread 151 to the inner peripheral surface of the undertread 152 in FIG. 5). Therefore, the rubber gauge of the tread rubber 15 is measured excluding the grooves formed on the tread surface.
- the rubber gauge Tu is substantially the gauge of the rubber member (side wall rubber 16 in FIG. 5) inserted between the end of the innermost layer (wide cross belt 141 in FIG. 5) of the belt layer 14 and the carcass layer 13. measured as
- the circumferential main groove closest to the tire equatorial plane CL is defined as the circumferential main groove 21 (see FIG. 5) on the tire equatorial plane CL, and when there is no circumferential main groove on the tire equatorial plane CL (not shown) ) is defined as the circumferential main groove closest to the tire equatorial plane CL.
- the distance Hu [mm] and the distance Hl [mm] have a relationship of 0.30 ⁇ Hu/(Hu+Hl) ⁇ 0.70, preferably 0.35 ⁇ Hu/(Hu+Hl) ⁇ 0.65. have a relationship.
- the position of the tire maximum width position Ac in the deformable region of the tire side portion is optimized. Specifically, the above lower limit alleviates the stress concentration near the ends of the belt ply caused by the maximum tire width position Ac being too close to the ends of the belt layer 14, thereby suppressing the separation of the peripheral rubber.
- the ratio Gl/Gc between the total gauge Gl [mm] of the tire side portion at the point Al and the total gauge Gc [mm] of the tire side portion at the maximum tire width position Ac is 1.00 ⁇ It is in the range of Gl/Gc ⁇ 7.00, preferably the ratio Gu/Gc is in the range of 2.00 ⁇ Gl/Gc ⁇ 5.00.
- the gauge distribution of the tire side portion from the tire maximum width position Ac to the bead core 11 is optimized.
- the above lower limit secures the total gauge Gl in the radially inner region, suppresses deformation of the tire during use under a high load, and secures the wear resistance performance of the tire.
- the above upper limit suppresses deterioration of tire rolling resistance caused by an excessively large total gauge Gl.
- the distance ⁇ Au′ [mm] in the tire width direction from the tire maximum width position Ac to the point Au′ is 0 with respect to 70% of the distance Hu [mm] from the tire maximum width position Ac. 0.03 ⁇ Au′/(Hu ⁇ 0.70) ⁇ 0.23, preferably 0.07 ⁇ Au′/(Hu ⁇ 0.70) ⁇ 0.17.
- This optimizes the degree of curvature of the side profile in the radially outer region.
- the above lower limit suppresses the occurrence of stress concentration due to flattening of the tire side portion, thereby improving the durability performance of the tire.
- the above upper limit reduces the deflection amount of the tire side portion when the tire rolls, thereby reducing the rolling resistance of the tire.
- the above lower limit secures the radius of curvature of the side profile and optimizes the carcass tension, thereby suppressing tire collapse and sidecutting of the tire.
- the above upper limit suppresses side cutting of the tire due to excessive tension of the carcass layer 13 .
- the modulus MC [MPa] of the coating rubber 13cr of the carcass plies 13A, 13B is in the range of 1.5 ⁇ MC ⁇ 12.0, preferably in the range of 2.0 ⁇ MC ⁇ 10.0.
- the tire 1 includes a pair of bead cores 11, 11, a carcass layer 13 spanning the bead cores 11, 11, and a belt layer 14 arranged radially outside the carcass layer 13. (See Figure 1). Further, the tire outer diameter OD [mm] is in the range of 200 ⁇ OD ⁇ 660, and the total tire width SW [mm] is in the range of 100 ⁇ SW ⁇ 400. Also, the carcass layer 13 is formed by laminating two layers of carcass plies 13A and 13B, each of which is formed by coating an organic fiber cord with a coating rubber.
- the test tire of the comparative example has a tire outer diameter OD of 531 [mm], a total tire width SW of 143 [mm], and a tire contact width TW of 123 [mm]. Mounted on the rim.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
図1は、この発明の実施の形態にかかるタイヤ1を示すタイヤ子午線方向の断面図である。同図は、リム10に装着されたタイヤ1のタイヤ径方向の片側領域の断面図を示している。この実施の形態では、タイヤの一例として、乗用車用空気入りラジアルタイヤについて説明する。
図1において、上記のように、一対のビードコア11、11がスチールから成る1本あるいは複数本のビードワイヤ(図示省略)を環状かつ多重に巻き廻して成る。また、一対のビードフィラー12、12が一対のビードコア11、11のタイヤ径方向外周にそれぞれ配置される。
図2は、図1に記載したタイヤ1を示す拡大図である。同図は、タイヤ赤道面CLを境界とした片側領域を示している。
図3は、図1に記載したタイヤ1のベルト層の積層構造を示す説明図である。同図では、各ベルトプライ141~145に付された細線が、ベルトコードの配置構成を模式的に示している。
図4は、図1に記載したタイヤ1のトレッド部を示す拡大図である。
図6は、図1に記載したタイヤ1のサイドフォール部およびビード部を示す拡大図である。図7は、図6に記載したサイドウォール部を示す拡大図である。
図8は、図1に記載したタイヤのカーカス層およびベルト層の積層構造を示す説明図である。同図は、タイヤ子午線方向の断面視における拡大図を示している。
図9は、図1に記載したタイヤ1の変形例1を示す説明図である。同図は、ベルト層14の積層構造を示している。同図において、図3で記載した構成要素と同一の構成要素には同一の符号を付し、その説明を省略する。
図10は、図1に記載したタイヤ1の変形例2を示す説明図である。同図において、図3で記載した構成要素と同一の構成要素には同一の符号を付し、その説明を省略する。
図11は、図1に記載したタイヤ1の変形例3を示す説明図である。同図において、図3で記載した構成要素と同一の構成要素には同一の符号を付し、その説明を省略する。
以上説明したように、このタイヤ1は、一対のビードコア11、11と、ビードコア11、11に架け渡されたカーカス層13と、カーカス層13の径方向外側に配置されたベルト層14とを備える(図1参照)。また、タイヤ外径OD[mm]が、200≦OD≦660の範囲にあり、タイヤ総幅SW[mm]が、100≦SW≦400の範囲にある。また、カーカス層13が、有機繊維コードをコートゴムで被覆して成る2層のカーカスプライ13A、13Bを積層して成る。また、2層のカーカスプライ13A、13Bの有機繊維コードが、タイヤ周方向に対して80[deg]以上100[deg]以下の範囲にあるコード角度を有する。また、2層のカーカスプライ13A、13Bのそれぞれの幅50[mm]あたりの強力Tcs[N/50mm]が、タイヤ外径OD[mm]に対して17≦Tcs/OD≦120の範囲にある。
Claims (12)
- 一対のビードコアと、前記ビードコアに架け渡されたカーカス層と、前記カーカス層の径方向外側に配置されたベルト層とを備えるタイヤであって、
タイヤ外径OD[mm]が、200≦OD≦660の範囲にあり、
タイヤ総幅SW[mm]が、100≦SW≦400の範囲にあり、
前記カーカス層が、有機繊維コードをコートゴムで被覆して成る2層のカーカスプライを積層して成り、
前記2層のカーカスプライの前記有機繊維コードが、タイヤ周方向に対して80[deg]以上100[deg]以下の範囲にあるコード角度を有し、且つ、
前記2層のカーカスプライのそれぞれの幅50[mm]あたりの強力Tcs[N/50mm]が、タイヤ外径OD[mm]に対して17≦Tcs/OD≦120の範囲にあることを特徴とするタイヤ。 - 前記2層のカーカスプライのうち内径側カーカスプライの前記有機繊維コードの中心からタイヤ内面までの距離TL[mm]が、タイヤ外径OD[mm]に対して0.001≦TL/OD≦0.009の範囲にある請求項1に記載のタイヤ。
- 前記内径側カーカスプライの前記有機繊維コードの中心から前記内径側カーカスプライの外面までの距離TCSU[mm]が、前記内径側カーカスプライの前記有機繊維コードの中心からタイヤ内面までの距離TL[mm]に対して0.09≦TCSU/TL≦1.00の範囲にある請求項1または2に記載のタイヤ。
- ゴム材料から成ると共にタイヤ内腔面に配置されて前記カーカス層を覆うインナーライナを備え、
前記ベルト層が、有機繊維コードをコートゴムで被覆して成る複数のベルトプライを積層して成り、且つ、
前記カーカスプライの前記コートゴムの100[%]伸張時のモジュラスMC[MPa]が、前記インナーライナの100[%]伸張時のモジュラスMIL[MPa]および前記ベルト層の最内層のベルトプライの前記コートゴムの100[%]伸張時のモジュラスMB[MPa]に対してMIL≦MC≦MBの範囲にある請求項1~3のいずれか一つに記載のタイヤ。 - 前記カーカスプライの前記コートゴムのモジュラスMC[MPa]が、前記インナーライナのモジュラスMIL[MPa]に対して1.00≦MC/MIL≦3.00の範囲にある請求項4に記載のタイヤ。
- 前記最内層のベルトプライの前記コートゴムのモジュラスMB[MPa]が、前記カーカスプライの前記コートゴムのモジュラスMC[MPa]に対して1.10≦MB/MC≦2.40の範囲にある請求項4または5に記載のタイヤ。
- 前記カーカスプライの前記コートゴムのモジュラスMC[MPa]が、4.5≦MC≦12.0の範囲にある請求項4~6のいずれか一つに記載のタイヤ。
- 前記カーカスプライの厚さTC[mm]と、前記カーカスプライの前記コートゴムの60[℃]における損失正接tanδとの積が、0.08≦TC×tanδ≦0.45の範囲にある請求項1~7のいずれか一つに記載のタイヤ。
- 前記ベルト層が、有機繊維コードをコートゴムで被覆して成る複数のベルトプライを積層して成り、且つ、
前記カーカス層の最外層のカーカスプライと前記ベルト層の最内層のベルトプライとの幅25[mm]あたりの剥離力Hpp[N/25mm]が、前記カーカスプライのカーカスコードの外径の中心から前記ベルトプライのベルトコードの外径の中心までの距離TCB[mm]に対して90≦Hpp/TCB≦300の範囲にある請求項1~8のいずれか一つに記載のタイヤ。 - 前記2層のカーカスプライのそれぞれが、タイヤ内面に沿って延在する本体部と、前記ビードコアを包み込むようにタイヤ幅方向外側に巻きあげられてタイヤ径方向に延在する巻き上げ部とを有し、
リム径RDの測定点から前記巻き上げ部の端部までの径方向高さHcs[mm]を定義し、且つ、
少なくとも一方の前記カーカスプライの前記巻き上げ部の径方向高さHcs[mm]が、タイヤ断面高さSH[mm]に対して0.49≦Hcs/SH≦0.80の範囲にある請求項1~9のいずれか一つに記載のタイヤ。 - 前記ベルト層が、スチールコードをコートゴムで被覆して成ると共に相互に異符号かつタイヤ周方向に対して15[deg]以上55[deg]以下のコード角度を有する一対の交差ベルトを積層して成り、且つ、
前記一対の交差ベルトのそれぞれの幅50[mm]あたりの強力Tbt[N/50mm]が、タイヤ外径OD[mm]に対して25≦Tbt/OD≦250の範囲にある請求項1~10のいずれか一つに記載のタイヤ。 - 一対のビードコアと、前記ビードコアに架け渡されたカーカス層とを備えるタイヤであって、
タイヤ外径OD[mm]が、200≦OD≦660の範囲にあり、
タイヤ総幅SW[mm]が、100≦SW≦400の範囲にあり、
前記カーカス層が、有機繊維コードをコートゴムで被覆して成る2層のカーカスプライを積層して成り、
前記2層のカーカスプライの前記有機繊維コードが、相互に異符号かつタイヤ周方向に対して45[deg]以上70[deg]以下の範囲にあるコード角度を有し、
前記2層のカーカスプライの幅50[mm]あたりの強力Tcs[N/50mm]のそれぞれが、タイヤ外径OD[mm]に対して17≦Tcs/OD≦120の範囲にあることを特徴とするタイヤ。
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JPS621601A (ja) * | 1985-06-27 | 1987-01-07 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JPH01240305A (ja) * | 1988-03-22 | 1989-09-25 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
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