WO2004089657A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2004089657A1 WO2004089657A1 PCT/JP2004/004052 JP2004004052W WO2004089657A1 WO 2004089657 A1 WO2004089657 A1 WO 2004089657A1 JP 2004004052 W JP2004004052 W JP 2004004052W WO 2004089657 A1 WO2004089657 A1 WO 2004089657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- tread
- reinforcing rubber
- carcass
- rubber layer
- Prior art date
Links
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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
-
- 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
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
Definitions
- the present invention relates to a pneumatic tire having run-flat running performance, and more particularly, to improve ride comfort during normal running and improve durability during run-flat running while minimizing increase in mass.
- a reinforcing rubber layer having a crescent cross section is provided on a side wall portion, and the longitudinal radius of the tire at the time of puncturing is suppressed based on the rigidity of the reinforcing rubber layer.
- Pneumatic tires have been proposed to prevent the destruction of tires.
- a carcass layer composed of three or more carcass plies is formed, and a crescent-shaped side reinforcing rubber layer is arranged between the layers of the force splice in the side wall portion. It has been proposed to dispose a tread reinforcing rubber layer between carcass plies in a tread portion (for example, see Japanese Patent Application Laid-Open No. H10-151917).
- the tread and side reinforcing rubber layers are sandwiched between the eyebrows of the scallop to increase the bending stiffness between the tread and side walls and extend the cruising distance in a punctured state.
- the ride comfort can be improved by making the side reinforcing rubber layer thinner.
- An object of the present invention is to provide a pneumatic tire capable of improving ride comfort during normal running and improving durability during run-flat driving while minimizing an increase in mass. is there.
- a pneumatic tire according to the present invention for solving the above-mentioned object comprises two or less carcass plies extending from a tread portion to a bead portion via a sidewall portion, and formed of an organic fiber code.
- the tread portion includes a radially outermost radial direction.
- a tread reinforcing rubber layer on the radially inner side of the belt ply located on the radially outer side of the carcass ply and the radially innermost side of the carcass ply located on the tire side, and the sidewall portion is located on the innermost side in the tire axial direction.
- all carcass plies are arranged inside the tread reinforcing rubber layer in the tire radial direction and outside the side reinforcing rubber layer in the tire axial direction. Therefore, when traveling with the tire pressure significantly reduced or the tire pressure reduced to 0 kPa (hereinafter referred to as run-flat traveling), that is, when each reinforcing rubber layer is curved, Since all the carcass plies exist on the tension side, the bending rigidity of the tread portion and the sidewall portion in the run flat running can be efficiently increased.
- the structure in which at least one carcass ply constituting the carcass layer is folded around the bead core makes the carcass ply effectively function as a tensile material, and greatly contributes to improvement in bending rigidity.
- the tread reinforced rubber layer suppresses the buckle phenomenon in the tread portion, and the side reinforced rubber layer suppresses the vertical deflection of the side wall portion, optimizing the ground contact shape and improving steering stability. It is possible to improve the durability and, in turn, the durability. Also, by forming an effective reinforcing structure as described above, Since it is possible to make the rubber reinforcing layer thinner, it is possible to improve the riding comfort during normal running while minimizing the increase in the mass of the pneumatic tire.
- the width of the tread reinforcing rubber layer is preferably 60 to 100% of the width of the belt bridge located on the innermost side in the tire radial direction.
- the thickness of the tread reinforcing rubber layer gradually decreases from the center in the tire axial direction to the outside, and the thickness at the center in the tire width direction is preferably 2 to 8 mm.
- the rubber composition used for the tread reinforcing rubber layer and the side reinforcing rubber layer has a hardness (JIS-A) of 50 to 95 and a loss tangent tan S of 0.05 to 0.3.
- 100% ⁇ Juras is preferably 0.5 to 15.0 MPa.
- FIG. 1 is a meridional section showing a pneumatic tire according to an embodiment of the present invention.
- FIG. 1 shows a pneumatic tire according to an embodiment of the present invention.
- 1 is a tread portion
- 2 is a sidewall portion
- 3 is a bead portion.
- a carcass layer 4 composed of two carcass plies 4A and 4B including a plurality of organic fiber cords arranged in parallel is mounted between a pair of right and left bead portions 3 and 3.
- the inclination angle of the organic fiber cords composing the power cast plies 4A and 4B with respect to the tire circumferential direction is 70 to 90 °.
- Each of these force cascades 4 A and 4 B is folded from the inside of the tire to the outside around a bead core 5 arranged in the bead portion 3.
- a belt layer 6 composed of two belt plies 6 A and 6 B including a plurality of reinforcing cords arranged in parallel is buried outside the carcass layer 4 in the tread portion 1 in the tire radial direction. I have.
- the reinforcing cords of these belt plies 6A and 6B are 15 to 35 in the circumferential direction of the evening. And the reinforcing cords are arranged so as to cross each other between the layers.
- a belt cover layer 7 having reinforcing codes oriented in the tire circumferential direction is provided outside the belt layer 6 in the tire radial direction.
- a tread reinforcing rubber layer 8 is inserted radially outside of the carcass ply 4B located on the tire radially outer side and radially inside of the belt ply 6A located on the tire radially innermost side. ing.
- the width W of the tread reinforcing rubber layer 8 is 60% to 100% of the width WB of the belt ply 6A located on the innermost side in the tire radial direction. If the width W of the tread reinforcing rubber layer 8 is less than 60% of the width WB of the belt ply 6A, the reinforcing effect will be insufficient, and if it exceeds 100%, the riding comfort during normal running will be poor. descend.
- the thickness of the tread reinforcing rubber layer 8 gradually decreases from the center in the tire axial direction toward the outside, and the thickness t, at the center in the tire width direction is 2 to 8 mm. Thereby, it is possible to effectively prevent the central portion of the train and the sword portion 1 from being depressed inward in the tire radial direction during the run flat run. If the thickness of the tread reinforcing rubber layer 8 is less than 2 mm, the reinforcing effect will be insufficient, and if it exceeds 8 mm, the riding comfort will decrease.
- a side reinforcing rubber layer 9 having a crescent cross section is inserted axially inside the carcass ply 4A located on the innermost side in the tire axial direction.
- the thickness of the side reinforcing rubber layer 9 2 gradually decreases toward the tire radial direction central portion to the tread side and the bead side, that has a thickness of at maximum width position tire 1 2 becomes 4 to 1 2 mm.
- a reinforcing effect thickness t 2 of the side reinforcing rubber layer 9 is less than 4 mm is Ri insufficiently name ride decreases when more than 1 2 mm reversed.
- the side wall portion 2 reinforced by the side reinforcing rubber layer 9 is deformed so as to protrude outward in the tire axial direction, and the tread reinforced by the tread reinforcing rubber layer 8 is provided.
- the center of the part 1 is deformed so as to be depressed inward in the tire radial direction.
- all of the carcass plies 4 A and 4 B are present in the region where the bow tensile stress acts on the radially inner side of the tread reinforcing rubber layer 8 and on the outer side in the tire axial direction of the side reinforcing rubber layer 9. It exists in the area where tensile stress acts. Therefore, the bending stiffness of the tread portion 1 and the side wall portion 2 during run flat traveling can be efficiently increased.
- At least one of the carcass plies 4 ⁇ and 4 ⁇ ⁇ ⁇ must have a structure folded back around the bead core 5. It is. Such a bead lock structure Depending on the structure, at least one of the carcass plies 4A and 4B effectively functions as a tensile material.
- the tread reinforcing rubber layer 8 suppresses the buckle phenomenon of the tread portion 1, and the side reinforcing rubber layer 9 suppresses the vertical radius of the side wall portion 2.
- the side reinforcing rubber layer 9 can be made thinner than before, it is possible to improve the riding comfort during normal running while minimizing the increase in the mass of the pneumatic tire.
- the rubber composition used for the reinforcing rubber layers 8 and 9 has a hardness (JIS-A) of 50 to 95 and a loss tangent tan S of 0.05 to 0.3.
- the 100% modulus at 20 ° C. is preferably 0.5 to 15 OMPa.
- the loss tangent tan 5 was measured using a viscoelastic spectrometer at a temperature of 20 ° C, a frequency of 20 Hz, an initial strain of 10%, and a dynamic strain of ⁇ 2%. .
- a pneumatic tire having the same structure as that of Conventional Example 1 was manufactured except that a side reinforcing rubber layer having a crescent cross section was arranged in the side wall portion in the axial direction of the carcass ply located on the innermost side in the tire axial direction.
- a carcass layer consisting of three carcass plies is formed, a crescent-shaped side reinforcing rubber layer is placed between the layers of the force ply in the sidewall portion, and a tread reinforcing rubber layer is placed between the layers of the carcass ply in the tread portion.
- a pneumatic tire having the same structure as in Conventional Example 1 except that the layers were arranged was manufactured. The thickness of the tread reinforcing rubber layer was gradually reduced from the center in the axial direction of the tire toward the outside, and the thickness at the center in the width direction of the tire was 3 mm.
- a tread reinforcing rubber layer is disposed radially outward of a carcass ply located radially outermost and radially innerward of a belt ply located radially innermost in a tire
- a pneumatic tire having the same structure as Conventional Example 1 except that a side reinforcing rubber layer with a crescent cross-section was placed axially inside the carcass ply located on the innermost side in the tire axial direction at the sidewall. did.
- the thickness of the tread reinforcing rubber layer was gradually reduced from the center in the tire axial direction to the outside, and the thickness at the center in the tire width direction was 3 mm.
- the tire mass was adjusted to that of Conventional Example 2.
- a pneumatic tire having the same structure as in Example 1 was manufactured except that the volume of the side reinforcing rubber layer was reduced.
- a pneumatic tire having the same structure as in Example 2 was manufactured except that the thickness of the tread reinforcing rubber layer was fixed at 1 mm.
- each test tire on a rim size 17 x 7 1/2 JJ wheel, mount it on the right side of the front wheel of a rear-wheel drive vehicle at 0 kPa air pressure with the valve core removed, and run 90 km on an elliptical circuit course After traveling counterclockwise at a speed of / h, the test driver felt abnormal vibration due to a tire failure and measured the distance until the vehicle stopped traveling.
- Each test tire was assembled on a rim size 17 x 7 1/2 JJ wheel, mounted on all wheels of the vehicle at an air pressure of 23 O kPa, and a filling test was performed by a test driver.
- the evaluation results were shown by a 5-point method. The higher the score, the better the ride.
- the tires of Examples 1 to 3 can improve the riding comfort during normal driving and the durability during run-flat driving while minimizing the increase in mass.
- the present invention can be effectively used in the tire manufacturing industry and eventually in the automobile manufacturing industry.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004000531T DE112004000531T5 (de) | 2003-04-01 | 2004-03-24 | Luftreifen |
US10/548,168 US7438103B2 (en) | 2003-04-01 | 2004-03-24 | Pneumatic tire with side reinforcement rubber layer and tread reinforcement rubber layer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003097662A JP2004299639A (ja) | 2003-04-01 | 2003-04-01 | 空気入りタイヤ |
JP2003-097662 | 2003-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004089657A1 true WO2004089657A1 (ja) | 2004-10-21 |
Family
ID=33156649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004052 WO2004089657A1 (ja) | 2003-04-01 | 2004-03-24 | 空気入りタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7438103B2 (ja) |
JP (1) | JP2004299639A (ja) |
CN (1) | CN100439131C (ja) |
DE (1) | DE112004000531T5 (ja) |
WO (1) | WO2004089657A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11135876B2 (en) | 2016-05-12 | 2021-10-05 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006151170A (ja) * | 2004-11-29 | 2006-06-15 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP4765476B2 (ja) * | 2005-08-18 | 2011-09-07 | 横浜ゴム株式会社 | タイヤ/ホイール組立体 |
JP4915066B2 (ja) * | 2005-08-25 | 2012-04-11 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP4765483B2 (ja) * | 2005-08-25 | 2011-09-07 | 横浜ゴム株式会社 | 空気入りタイヤ |
EP1990218B1 (en) * | 2006-05-09 | 2012-01-11 | Sumitomo Rubber Industries, Ltd. | Run flat tire |
JP4971680B2 (ja) * | 2006-05-10 | 2012-07-11 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP4968887B2 (ja) * | 2006-07-11 | 2012-07-04 | 東洋ゴム工業株式会社 | ランフラットタイヤ |
JP5185599B2 (ja) * | 2007-11-14 | 2013-04-17 | 住友ゴム工業株式会社 | ランフラットタイヤ |
WO2009072420A1 (ja) * | 2007-12-06 | 2009-06-11 | Sumitomo Rubber Industries, Ltd. | ランフラットタイヤ |
JP4635041B2 (ja) * | 2007-12-06 | 2011-02-16 | 住友ゴム工業株式会社 | ランフラットタイヤ |
JP4635040B2 (ja) * | 2007-12-06 | 2011-02-16 | 住友ゴム工業株式会社 | ランフラットタイヤ |
USD608724S1 (en) | 2009-03-16 | 2010-01-26 | Trek Bicycle Corporation | Bicycle tire tread |
KR20110049422A (ko) * | 2009-11-05 | 2011-05-12 | 한국타이어 주식회사 | 돌기승월능력을 향상시킨 중하중차량용 타이어 |
JP5263264B2 (ja) * | 2010-11-02 | 2013-08-14 | 横浜ゴム株式会社 | 空気入りランフラットタイヤ |
CN103092865A (zh) * | 2011-11-03 | 2013-05-08 | 国家电网公司 | 调度自动化系统参数自动更新方法与系统 |
JP6028359B2 (ja) * | 2012-03-23 | 2016-11-16 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP5798579B2 (ja) * | 2013-02-06 | 2015-10-21 | 住友ゴム工業株式会社 | 重荷重用空気入りタイヤ |
JP6593046B2 (ja) | 2015-09-10 | 2019-10-23 | 横浜ゴム株式会社 | 空気入りタイヤ |
EP3418074B1 (en) * | 2016-12-20 | 2020-06-10 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
CN111542441B (zh) * | 2017-12-22 | 2022-05-06 | 横滨橡胶株式会社 | 泄气保用轮胎 |
JP2020138602A (ja) * | 2019-02-27 | 2020-09-03 | 株式会社ブリヂストン | ランフラットタイヤ |
CN110039958A (zh) * | 2019-05-24 | 2019-07-23 | 厦门正新橡胶工业有限公司 | 一种免充气轮胎 |
CN111422010A (zh) * | 2020-03-26 | 2020-07-17 | 万达集团股份有限公司 | 一种失压状况下防失控轮胎 |
WO2021217000A1 (en) * | 2020-04-24 | 2021-10-28 | Otr Wheel Engineering, Inc. | Tire and wheel assembly for machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10151917A (ja) * | 1996-11-21 | 1998-06-09 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2002012004A (ja) * | 2000-06-28 | 2002-01-15 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6026878A (en) * | 1997-05-29 | 2000-02-22 | The Goodyear Tire & Rubber Company | Inextensible high temperature resistant tire |
JP3335112B2 (ja) * | 1997-10-20 | 2002-10-15 | 住友ゴム工業株式会社 | ランフラットタイヤ |
EP1022162B1 (en) * | 1999-01-20 | 2003-04-23 | The Goodyear Tire & Rubber Company | Tire with improved run-flat design |
JP2001018611A (ja) * | 1999-07-09 | 2001-01-23 | Bridgestone Corp | 空気入りラジアルタイヤ |
ATE298672T1 (de) * | 1999-08-05 | 2005-07-15 | Pirelli | Reifen für kraftfahrzeugräder |
-
2003
- 2003-04-01 JP JP2003097662A patent/JP2004299639A/ja active Pending
-
2004
- 2004-03-24 DE DE112004000531T patent/DE112004000531T5/de not_active Withdrawn
- 2004-03-24 US US10/548,168 patent/US7438103B2/en not_active Expired - Fee Related
- 2004-03-24 CN CNB2004800084923A patent/CN100439131C/zh not_active Expired - Fee Related
- 2004-03-24 WO PCT/JP2004/004052 patent/WO2004089657A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10151917A (ja) * | 1996-11-21 | 1998-06-09 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2002012004A (ja) * | 2000-06-28 | 2002-01-15 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11135876B2 (en) | 2016-05-12 | 2021-10-05 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
Also Published As
Publication number | Publication date |
---|---|
CN1767959A (zh) | 2006-05-03 |
CN100439131C (zh) | 2008-12-03 |
JP2004299639A (ja) | 2004-10-28 |
US7438103B2 (en) | 2008-10-21 |
US20060169378A1 (en) | 2006-08-03 |
DE112004000531T5 (de) | 2006-02-23 |
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