WO2013099675A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2013099675A1 WO2013099675A1 PCT/JP2012/082654 JP2012082654W WO2013099675A1 WO 2013099675 A1 WO2013099675 A1 WO 2013099675A1 JP 2012082654 W JP2012082654 W JP 2012082654W WO 2013099675 A1 WO2013099675 A1 WO 2013099675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- tire
- middle lateral
- main groove
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- 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
-
- 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
-
- 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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
- B60C11/0309—Patterns comprising block rows or discontinuous ribs 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0346—Circumferential grooves with zigzag shape
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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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
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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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
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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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
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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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane
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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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
-
- 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
- B60C2011/0388—Continuous ribs provided at the equatorial plane
Definitions
- the present invention relates to a pneumatic tire in which noise performance and drainage performance are improved in a well-balanced manner.
- a main groove extending continuously in the tire circumferential direction and a lateral groove communicating with the main groove are provided in the tread portion of the pneumatic tire.
- resonance vibration air column resonance
- noise is generated in order to suppress the noise of such a pneumatic tire, for example, a portion having a small groove width is provided in the lateral groove. A portion having a small groove width is made small by disturbing resonance vibration.
- the present invention has been devised in view of the above circumstances, and its main object is to provide a pneumatic tire in which noise performance and drainage performance can be improved in a well-balanced manner.
- the present invention provides a center main groove extending continuously on the tire equator or both sides of the tire equator in the tire circumferential direction on the tread portion, and a pair extending continuously in the tire circumferential direction on the outer side of the center main groove in the tire axial direction.
- a center main groove extending continuously on the tire equator or both sides of the tire equator in the tire circumferential direction on the tread portion, and a pair extending continuously in the tire circumferential direction on the outer side of the center main groove in the tire axial direction.
- a middle land portion is divided between the center main groove and the shoulder main groove, wherein the middle land portion includes a plurality of inner middle portions.
- each inner middle lateral groove having a first inclined portion extending outward in the tire axial direction from the center main groove at an angle of 10 to 40 ° with respect to the tire circumferential direction;
- a second inclined portion inclined in the opposite direction to the first inclined portion, extending inward in the tire axial direction and terminating without reaching the center main groove, and bending between the first inclined portion and the second inclined portion
- Each outer middle lateral groove has an inner end in the tire axial direction connected to the inner middle lateral groove, and an outer end in the tire axial direction connected to the shoulder main groove, and the inner middle lateral groove has the inner end.
- the end is connected to the second inclined portion side from the outermost groove edge end in the tire axial direction of the inner middle horizontal groove, and the outer middle horizontal groove is inclined in the same direction as the first inclined portion of the inner middle horizontal groove.
- the angle of the outer middle lateral groove with respect to the tire circumferential direction is in the range of 30 to 70 °.
- the pneumatic tire of the present invention provides excellent drainage performance and noise performance.
- the pneumatic tire of this embodiment (hereinafter simply referred to as “tire”) is used as an all-season tire for a four-wheel drive vehicle, for example.
- the tire has a tread portion 2.
- the tread portion 2 has a pair of center main grooves 3 extending continuously in the tire circumferential direction on both sides of the tire equator C, and a pair of tires extending outward in the tire axial direction in the tire axial direction.
- a shoulder main groove 4 is provided.
- the tread portion 2 includes a center land portion 5 between the pair of center main grooves 3 and 3, a pair of middle land portions 6 between the center main groove 3 and the shoulder main grooves 4, and the shoulder main groove 4. And a pair of shoulder land portions 7 between the ground contact Te and the ground contact Te.
- the “grounding end” Te is grounded to a flat surface at a camber angle of 0 degrees by applying a normal load to a tire in a normal state in which a rim is assembled on a normal rim (not shown) and filled with a normal internal pressure. It is determined as the ground contact position on the outermost side in the tire axial direction when the The distance in the tire axial direction between the ground contact Te and Te is determined as a tread ground contact width TW. When there is no notice in particular, the dimension of each part of a tire, etc. are values measured in this normal state.
- the “regular rim” is a rim defined for each tire in the standard system including the standard on which the tire is based, and is “standard rim” for JATMA, and “Design” Rim for TRA. In the case of ETRTO, it is Me “Measuring Rim”.
- the “regular internal pressure” is the air pressure determined by each standard for each tire in the standard system including the standard on which the tire is based, and is “maximum air pressure” for JATMA, and “TIRE LOAD” for TRA.
- the maximum value described in LIMITS AT AT VARIOUS COLD INFLATION PRESSURES "", ETRTO is "INFLATION PRESSURE” ", but 180 kPa when the tire is for passenger cars.
- the “regular load” is a load determined by each standard for each tire in the standard system including the standard on which the tire is based.
- “JAMATA” indicates “maximum load capacity”
- TRA indicates “TIRE”
- the maximum value described in “LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES” is “LOAD CAPACITY” in the case of ETRTO.
- the center main groove 3 is formed by a plurality of arcuate portions 3a.
- Each arc-shaped portion 3a includes an arc having a center on the outer side in the tire axial direction and extending in the tire circumferential direction. By connecting these arc-shaped portions 3a, a center main groove 3 extending in a wave shape in the tire circumferential direction is formed.
- the center main groove 3 has an outer apex 3i protruding outward in the tire axial direction.
- the outer vertex 3i is the outermost edge in the tire axial direction among the outer groove edges 3x of the center main groove 3 in the tire axial direction.
- the outer groove edge 3x is smoothly extended so that a closed center main groove space is determined.
- the position on the outermost side in the tire axial direction of the outer groove edge 3x of the center main groove space is determined as the outer vertex 3i.
- a virtual outer edge 14 extending from one end 13 of the outer groove edge 3x of the arc-shaped portion 3a is drawn so that a closed center main groove space is determined.
- the intersection of the virtual outer edge 14 and the outer groove edge 3x of the other arcuate portion 3a is the outer vertex 3i.
- the shoulder main groove 4 is formed of a plurality of arcuate portions 4a.
- Each arcuate portion 4a includes an arc having a center on the inner side in the tire axial direction and extending in the tire circumferential direction. By connecting these arc-shaped portions 4a, shoulder main grooves 4 extending in a wavy shape in the tire circumferential direction are formed.
- the shoulder main groove 4 has an inner apex 4i protruding inward in the tire axial direction.
- the inner vertex 4i is defined similarly to the outer vertex 3i. That is, the inner vertex 4i is defined as the innermost position in the tire axial direction of the inner groove edge 4y of the shoulder main groove 4 in the tire axial direction.
- the inner groove edge 4y is smoothly extended so that a closed shoulder main groove space is determined. Then, the innermost position in the tire axial direction of the inner groove edge 4y of the shoulder main groove space is defined as the inner vertex 4i.
- a virtual inner edge 16 is drawn by smoothly extending the inner groove edge 4y of the arcuate portion 4a so that the closed shoulder main groove space is determined.
- the intersection between the virtual inner edge 16 and the inner groove edge 4y of the other arcuate portion 4a is the inner vertex 4i.
- arc-shaped portions 3a and 4a it is sufficient for the arc-shaped portions 3a and 4a to have an overall shape curved like an arc, and a straight portion may be partially included.
- the center main groove 3 and the shoulder main groove 4 as described above improve noise performance by preventing air column resonance in the center main groove 3 and the shoulder main groove 4 while maintaining smooth drainage.
- the radius of curvature R1 of the groove center line 3a1 of the arc-shaped portion 3a of the center main groove 3 is preferably 30 to 100 mm.
- the radius of curvature R2 of the groove center line 4a1 of the arcuate portion 4a of the shoulder main groove 4 is preferably 10 to 70 mm.
- the groove width W1 of the center main groove 3 is in the range of 3.0 to 7.0% of the tread ground contact width TW, and the groove depth is in the range of 9.0 to 13.0 mm.
- the width W2 of the shoulder main groove 4 is in the range of 3.0 to 7.0% of the tread ground contact width TW, and the groove depth is in the range of 9.0 to 13.0 mm. .
- the tire axial distance L1 between the center line 3G of the amplitude of the center main groove 3 and the tire equator C is 5 to 10 of the tread contact width TW. % Range.
- the tire axial direction distance L2 between the amplitude center line 4G of the shoulder main groove 4 and the ground contact Te is in the range of 15 to 25% of the tread ground contact width TW.
- the middle land portion 6 is provided with a plurality of inner middle lateral grooves 8 and a plurality of outer middle lateral grooves 9.
- the inner middle lateral groove 8 extends from the center main groove 3.
- the outer middle lateral groove 9 connects the inner middle lateral groove 8 and the shoulder main groove 4. Since the lateral grooves 8 and 9 drain the water in the center main groove 3 to the shoulder main groove 4, high drainage performance is obtained.
- the inner middle lateral groove 8 includes a first inclined portion 10, a second inclined portion 12 inclined in a direction opposite to the first inclined portion 10, and a bent portion 11 between them. Is included.
- the first inclined portion 10 extends, for example, from the position including the outer apex 3i of the center main groove 3 outward in the tire axial direction.
- the first inclined portion 10 is inclined at an angle ⁇ 1 of 10 to 40 ° with respect to the tire circumferential direction.
- the angle ⁇ 1 is less than 10 °, it becomes difficult to drain the water in the center main groove 3 to the shoulder main groove 4 side.
- the angle ⁇ 1 exceeds 40 °, the drainage resistance during straight traveling is increased. Therefore, the angle ⁇ 1 is preferably in the range of 15 to 35 °.
- the second inclined portion 12 is inclined in the opposite direction to the first inclined portion 10. That is, the second inclined portion 12 extends from the bent portion 11 inward in the tire axial direction. Thereby, the inner middle lateral groove 8 is bent. Such an inner middle lateral groove 8 prevents air column resonance in the center main groove 3 or the inner middle lateral groove 8 and provides excellent noise performance.
- the second inclined portion 12 terminates without reaching the center main groove 3, for example.
- the second inclined portion 12 communicates with the first inclined portion 10 of another inner middle lateral groove 8 that is adjacent in the tire circumferential direction (on the lower side of the drawing in FIG. 2).
- the air passing through the first inclined portion 10 is divided into the shoulder main groove 4 side and the second inclined portion 12. Accordingly, since the amount of air flowing from the inner middle lateral groove 8 to the shoulder main groove 4 is reduced, air column resonance in the shoulder main groove 4 is reduced, and noise performance is further improved.
- the outer groove edge 10x in the tire axial direction of the first inclined portion 10 and the outer groove edge 3x of the arc-shaped portion 3a are smoothly connected. Thereby, a part of the water in the center main groove 3 is efficiently discharged into the inner middle lateral groove 8. Further, the middle land portion 6 can have a large rigidity.
- the distance La in the tire circumferential direction to the intersection 10e with the virtual outer edge 14 is preferably 35% or more of the tire circumferential direction length Lb of the first inclined portion 10, more preferably 40% or more, Preferably it is 85% or less, More preferably, it is 80% or less.
- the water film between the middle land portion 6 and the road surface and the water in the center main groove 3 are effectively discharged to the shoulder main groove 4 and the inner middle lateral groove 8.
- the air passing through the second inclined portion 12 collides with the inner groove edge 10y of the first inclined portion 10 of the other inner middle lateral groove 8 to prevent air column resonance.
- the angle ⁇ 2 of the second inclined portion 12 with respect to the tire circumferential direction is preferably in the range of 8 to 35 °, particularly preferably in the range of 13 to 33 °.
- the angle ⁇ 2 is preferably smaller than the angle ⁇ 1.
- Each of the first inclined portion 10 and the second inclined portion 12 extends linearly.
- the bent portion 11 has an arc shape centered on the inner side in the tire axial direction. Such a bent portion 11 improves the drainage performance and the rigidity of the middle land portion 6 in a well-balanced manner.
- the radius of curvature Ra of the groove center line 11c of the bent portion 11 is in the range of 15 to 90 mm. If the radius of curvature Ra is large, the effect of preventing air column resonance may be reduced. Conversely, if the radius of curvature Ra is small, drainage resistance tends to increase.
- the radius of curvature Ra of the groove center line 11c of the bent portion 11 is in the range of 25 to 80 mm.
- the groove width W3 of the inner middle lateral groove 8 is preferably 40 to 80 of the groove width W1 of the center main groove 3. % Range. From the same viewpoint, the groove depth of the inner middle lateral groove 8 is preferably in the range of 8.0 to 12.0 mm.
- the inner end 9i of the outer middle lateral groove 9 in the tire axial direction is connected to the second inclined portion 12 side with respect to the outermost groove edge 8e of the inner middle lateral groove 8 in the tire axial direction.
- An outer end 9 e of the outer middle lateral groove 9 in the tire axial direction communicates with the shoulder main groove 4.
- Such outer middle lateral groove 9 fluctuates the pressure of the air in the inner middle lateral groove 8 and reduces air column resonance there.
- the outer middle lateral groove 9 communicates with a position including the inner vertex 4 i of the shoulder main groove 4. More specifically, the inner groove edge 9 y in the tire axial direction of the outer middle lateral groove 9 is smoothly connected to the inner groove edge 4 y of the arcuate portion 4 a of the shoulder main groove 4. This further improves drainage performance.
- the distance Lc in the tire circumferential direction between the inner end 9i of the outer middle lateral groove 9 and the groove edge end 8e is preferably 0.5 times or more, more preferably 0.6 times or more the groove width W3 of the inner middle lateral groove 8. It is preferably 2.0 times or less, more preferably 1.8 times or less. That is, when the distance Lc is small, the effect of preventing air column resonance tends to be reduced. On the contrary, when the distance Lc is large, it is difficult to discharge the water in the first inclined portion 10 to the shoulder main groove 4 side.
- the inner end 9 i of the outer middle lateral groove 9 is an intersection of a virtual outer edge 17 that smoothly extends the outer groove edge 8 x on the outer side in the tire axial direction of the inner middle lateral groove 8 and the groove center line 9 c of the outer middle lateral groove 9. It is.
- the outer end 9e of the outer middle lateral groove 9 is an intersection of the virtual inner edge 16 and the groove center line 9c.
- the outer middle horizontal groove 9 has an inclination in the same direction as the first inclined portion 10 of the inner middle horizontal groove 8. Thereby, the water in the center main groove 3 is smoothly discharged to the shoulder main groove 4.
- the angle ⁇ 3 of the outer middle lateral groove 9 with respect to the tire circumferential direction is in the range of 30 to 70 °, particularly preferably in the range of 40 to 60 °.
- the angle ⁇ 3 is less than 30 ° or exceeds 70 °, drainage resistance from the first inclined portion 10 to the shoulder main groove 4 side is increased.
- of the difference between the angle ⁇ 3 of the outer middle lateral groove 9 and the angle ⁇ 1 of the first inclined portion 10 is preferably 5 ° or more. More preferably, it is 10 ° or more, preferably 30 ° or less, more preferably 25 ° or less.
- is small, air in the first inclined portion 10 tends to flow toward the outer middle lateral groove 9 side, and air column resonance is excited in the shoulder main groove 4, which may deteriorate noise performance.
- is large, the drainage resistance increases.
- ⁇ 3> ⁇ 1 is desirable in order to ensure a large lateral rigidity on the outer side in the tire axial direction of the middle land portion 6.
- the groove width W4 of the outer middle lateral groove 9 gradually increases toward the outer side in the tire axial direction. Thereby, the drainage to the shoulder main groove 4 side becomes smoother, and the drainage performance is further improved.
- the groove width W4 is in the range of 20 to 75% of the groove width W2 of the shoulder main groove 4.
- the groove depth of the outer middle lateral groove 9 is preferably in the range of 6.0 to 10.0 mm.
- the center land portion 5 has a plurality of center lug grooves 20.
- the center lug groove 20 is inclined from the center main groove 3 toward the inside in the tire axial direction.
- the center lug groove 20 terminates without reaching the tire equator C.
- the center land portion 5 of the present embodiment is formed as a rib extending continuously in the tire circumferential direction.
- the shoulder land portion 7 is provided with a plurality of shoulder lateral grooves 21. Since the shoulder lateral groove 21 extends from the shoulder main groove 4 to the outer side in the tire axial direction beyond the ground contact end Te of the tread portion 2, the drainage performance is improved.
- the shoulder land portion 7 of the present embodiment is formed as a shoulder block row 7R in which a plurality of shoulder blocks 7B divided by the shoulder main groove 4, the ground contact Te and the shoulder lateral groove 21 are arranged in the tire circumferential direction.
- the width W5 of the shoulder lateral groove 21 is in the range of 2.0 to 8.0 mm, and the groove depth is 6.0 to 10.0 mm. It is a range.
- a pneumatic tire of size 275 / 55R20 having the basic pattern of FIG. 1 was prototyped based on the specifications in Table 1, and the drainage performance and noise performance of each sample tire were tested.
- the common specifications and test methods for each tire are as follows.
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Abstract
Description
図1に示されるように、本実施形態の空気入りタイヤ(以下、単に「タイヤ」ということがある。)は、例えば、四輪駆動車用のオールシーズン用タイヤとして利用される。タイヤは、トレッド部2を有する。
88%に相当する荷重である。
トレッド接地幅TW:225mm
<センター主溝>
溝幅W1:7.2~8.2mm
センター主溝の溝深さ:11.3mm
振幅の中心線のタイヤ軸方向距離L1/TW:7%
<ショルダー主溝>
溝幅W2:5.6~7.6mm
ショルダー主溝の溝深さ:11.3mm
振幅の中心線のタイヤ軸方向距離L2/TW:20%
<内側ショルダー横溝>
溝深さ:8.0mm
<外側ショルダー横溝>
溝深さ:9.8mm
各試供タイヤが、リム20×9J、内圧230kPaにて、排気量5600ccの4輪駆動車の全輪に装着された。ドライバーは、半径100mのアスファルト路面上に水深10mm、長さ20mの水たまりを設けたコース上を、速度を段階的に増加させながら前記車両を進入させ、そのときの横加速度(横G)が計測され、55~80km/hの速度における前輪の平均横Gが算出された。結果は、比較例1を100とする指数で表示した。数値が大きいほど良好である。
上記テスト車両にて、ロードノイズ計測路(アスファルト粗面路)を速度60km/hで走行させたときの車内騒音が、運転席窓側耳許位置に設置したマイクロホンで採取され、狭帯域240Hz付近の気柱共鳴音のピーク値の音圧レベルが測定された。評価は、測定値の逆数であり、比較例1の値を100とする指数で示されている。数値が大きいほど良好である。
テストの結果が表1に示される。
3 センター主溝
4 ショルダー主溝
6 ミドル陸部
8 内側ミドル横溝
8e 内側ミドル横溝のタイヤ軸方向の最も外側の溝縁端
9 外側ミドル横溝
10 第1傾斜部
11 屈曲部
12 第2傾斜部
Claims (7)
- トレッド部に、タイヤ赤道上又はタイヤ赤道の両側をタイヤ周方向に連続してのびるセンター主溝と、該センター主溝のタイヤ軸方向の外側をタイヤ周方向に連続してのびる一対のショルダー主溝とが設けられることにより、
前記センター主溝と前記ショルダー主溝との間でミドル陸部が区分された空気入りタイヤであって、
前記ミドル陸部には、複数本の内側ミドル横溝及び複数本の外側ミドル横溝が設けられ、
前記各内側ミドル横溝は、前記センター主溝からタイヤ周方向に対して10~40°の角度でタイヤ軸方向外側にのびる第1傾斜部と、前記第1傾斜部とは逆向きに傾斜してタイヤ軸方向内側にのび前記センター主溝に達することなく終端する第2傾斜部と、前記第1傾斜部と前記第2傾斜部との間の屈曲部とを有し、
前記各外側ミドル横溝は、前記内側ミドル横溝に接続されるタイヤ軸方向の内端と、前記ショルダー主溝に連通されるタイヤ軸方向の外端とを有し、
前記外側ミドル横溝の前記内端は、前記内側ミドル横溝のタイヤ軸方向の最も外側の溝縁端よりも前記第2傾斜部側に接続され、
前記外側ミドル横溝は、前記内側ミドル横溝の第1傾斜部と同じ方向に傾斜し、
前記外側ミドル横溝のタイヤ周方向に対する角度は30~70°の範囲であることを特徴とする空気入りタイヤ。 - 前記内側ミドル横溝の第2傾斜部は、タイヤ周方向で隣接する他の内側ミドル横溝の第1傾斜部に連通している請求項1記載の空気入りタイヤ。
- 前記外側ミドル横溝の溝幅は、タイヤ軸方向外側に向かって漸増している請求項1又は2記載の空気入りタイヤ。
- 前記屈曲部は、溝中心線の曲率半径が15~90mmの円弧状である請求項1乃至3のいずれかに記載の空気入りタイヤ。
- 前記センター主溝は、タイヤ軸方向外側に中心を有する複数の円弧状部を含む波状であり、
前記センター主溝は、タイヤ軸方向外側に突出した外側頂点を有し、
前記内側ミドル横溝は、前記センター主溝の前記外側頂点からのびている請求項1乃至4のいずれかに記載の空気入りタイヤ。 - 前記ショルダー主溝は、タイヤ軸方向内側に中心を有する複数の円弧状部を含む波状であり、
前記ショルダー主溝は、タイヤ軸方向内側に突出した内側頂点を有し、
前記外側ミドル横溝は、前記ショルダー主溝の前記内側頂点からのびている請求項1乃至5のいずれかに記載の空気入りタイヤ。 - 前記外側ミドル横溝の前記角度は、前記第1傾斜部の前記角度よりも大きい請求項1乃至6のいずれかに記載の空気入りタイヤ。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280064804.7A CN104024001B (zh) | 2011-12-28 | 2012-12-17 | 充气轮胎 |
| EP12861901.2A EP2777951B1 (en) | 2011-12-28 | 2012-12-17 | Pneumatic tire |
| BR112014015931-9A BR112014015931B1 (pt) | 2011-12-28 | 2012-12-17 | pneumático |
| US14/360,397 US9809060B2 (en) | 2011-12-28 | 2012-12-17 | Pneumatic tire |
| RU2014125192/11A RU2601090C2 (ru) | 2011-12-28 | 2012-12-17 | Пневматическая шина |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011289681A JP5503634B2 (ja) | 2011-12-28 | 2011-12-28 | 空気入りタイヤ |
| JP2011-289681 | 2011-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013099675A1 true WO2013099675A1 (ja) | 2013-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/082654 Ceased WO2013099675A1 (ja) | 2011-12-28 | 2012-12-17 | 空気入りタイヤ |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9809060B2 (ja) |
| EP (1) | EP2777951B1 (ja) |
| JP (1) | JP5503634B2 (ja) |
| CN (1) | CN104024001B (ja) |
| BR (1) | BR112014015931B1 (ja) |
| RU (1) | RU2601090C2 (ja) |
| WO (1) | WO2013099675A1 (ja) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5620940B2 (ja) * | 2012-04-17 | 2014-11-05 | 住友ゴム工業株式会社 | 空気入りタイヤ |
| JP6348868B2 (ja) * | 2015-04-09 | 2018-06-27 | 住友ゴム工業株式会社 | 空気入りタイヤ |
| EP3176006B1 (en) * | 2015-11-24 | 2018-06-20 | Sumitomo Rubber Industries Limited | Tire |
| JP6851858B2 (ja) * | 2017-03-02 | 2021-03-31 | 株式会社ブリヂストン | タイヤ |
| JP6851859B2 (ja) * | 2017-03-02 | 2021-03-31 | 株式会社ブリヂストン | タイヤ |
| JP7078389B2 (ja) * | 2017-12-13 | 2022-05-31 | Toyo Tire株式会社 | 空気入りタイヤ |
| JP7066516B2 (ja) * | 2018-05-17 | 2022-05-13 | Toyo Tire株式会社 | 空気入りタイヤ |
| EP3744537B1 (en) * | 2019-05-31 | 2021-12-08 | Sumitomo Rubber Industries, Ltd. | Tire |
| CN112622530B (zh) * | 2019-10-08 | 2024-03-08 | 住友橡胶工业株式会社 | 轮胎 |
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| USD500286S1 (en) * | 2003-09-17 | 2004-12-28 | Michelin Recherche Et Technique S.A. | Tire tread |
| JP4505290B2 (ja) * | 2004-09-07 | 2010-07-21 | 株式会社ブリヂストン | 空気入りタイヤ |
| US8695655B2 (en) * | 2007-10-15 | 2014-04-15 | The Goodyear Tire & Rubber Company | Tire tread with tread wear indicator |
| JP4145346B1 (ja) * | 2007-11-07 | 2008-09-03 | 横浜ゴム株式会社 | 空気入りタイヤ |
| USD666555S1 (en) * | 2011-08-30 | 2012-09-04 | Sumitomo Rubber Industries, Ltd. | Tire for automobile |
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2011
- 2011-12-28 JP JP2011289681A patent/JP5503634B2/ja not_active Expired - Fee Related
-
2012
- 2012-12-17 RU RU2014125192/11A patent/RU2601090C2/ru not_active IP Right Cessation
- 2012-12-17 WO PCT/JP2012/082654 patent/WO2013099675A1/ja not_active Ceased
- 2012-12-17 CN CN201280064804.7A patent/CN104024001B/zh not_active Expired - Fee Related
- 2012-12-17 US US14/360,397 patent/US9809060B2/en not_active Expired - Fee Related
- 2012-12-17 BR BR112014015931-9A patent/BR112014015931B1/pt not_active IP Right Cessation
- 2012-12-17 EP EP12861901.2A patent/EP2777951B1/en not_active Not-in-force
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| JPH10278511A (ja) * | 1997-04-07 | 1998-10-20 | Bridgestone Corp | 乗用車用高性能空気入りラジアル・タイヤ |
| JPH11245625A (ja) | 1998-02-27 | 1999-09-14 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104024001B (zh) | 2016-09-21 |
| EP2777951A4 (en) | 2015-08-26 |
| BR112014015931A2 (pt) | 2017-06-13 |
| US9809060B2 (en) | 2017-11-07 |
| RU2014125192A (ru) | 2016-02-20 |
| EP2777951B1 (en) | 2017-02-22 |
| RU2601090C2 (ru) | 2016-10-27 |
| EP2777951A1 (en) | 2014-09-17 |
| US20140326382A1 (en) | 2014-11-06 |
| BR112014015931B1 (pt) | 2020-10-13 |
| CN104024001A (zh) | 2014-09-03 |
| BR112014015931A8 (pt) | 2017-07-04 |
| JP2013139168A (ja) | 2013-07-18 |
| JP5503634B2 (ja) | 2014-05-28 |
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