WO2009099000A1 - スタッドレスタイヤ - Google Patents
スタッドレスタイヤ Download PDFInfo
- Publication number
- WO2009099000A1 WO2009099000A1 PCT/JP2009/051496 JP2009051496W WO2009099000A1 WO 2009099000 A1 WO2009099000 A1 WO 2009099000A1 JP 2009051496 W JP2009051496 W JP 2009051496W WO 2009099000 A1 WO2009099000 A1 WO 2009099000A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- width
- belt
- belt ply
- tread
- Prior art date
Links
Images
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
- B60C9/28—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by the belt or breaker dimensions or curvature relative to carcass
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10279—Cushion
Definitions
- the present invention relates to a studless tire having a belt layer composed of two belt plies in which steel cords are arranged to be inclined in opposite directions with respect to the equator plane, and in particular, can improve performance on ice with a simple structure. About.
- ⁇ 1> is a studless tire having a belt layer composed of two belt plies in which steel cords are inclined with respect to the equator plane in opposite directions.
- ⁇ 2> is a studless tire according to ⁇ 1>, wherein the width of the belt ply on the inner side in the tire radial direction is 24 to 36 mm wider than the width of the belt ply on the outer side in the tire radial direction.
- ⁇ 3> is a studless tire in which the ratio of the tread width to the width of the belt ply on the outer side in the tire radial direction is 105 to 125% in ⁇ 1> or ⁇ 2>.
- the width of the belt ply disposed on the outer side in the tire radial direction of the belt ply is set to 60 to 70% of the maximum width of the tire.
- the stepping angle that is, the angle between the contact surface and the tread surface when the tire is viewed from the side. If the width of the belt ply placed outside in the tire radial direction is less than 60% of the maximum width of the tire, the belt rigidity becomes too low and steering stability deteriorates. On the other hand, if this exceeds 70%, the belt rigidity becomes too high and the effect of limiting the amount of water taken in is lost.
- the width of the belt ply on the inner side in the tire radial direction is 24 to 36 mm wider than the width of the belt ply on the outer side in the tire radial direction.
- the belt ply width on the inner side in the direction becomes too narrow, and the rigidity of the entire belt decreases and the steering stability deteriorates.
- this difference exceeds 36 mm, the belt ply width on the inner side in the tire radial direction Since the belt is too wide and the overall rigidity of the belt is too large, the stepping angle is not sufficiently small, and the movement of the end of the belt ply on the inner side in the tire radial direction accompanying the change in the cross-sectional shape for each rotation of the tire during driving is large. The possibility of generating belt end separation arises.
- the tire ground contact length is made longer than the conventional one by reducing the belt rigidity.
- the ground contact width is reduced by the longer ground contact length, and the same ground contact area is supported while the wedge effect on the snow top surface can be improved, and the grip performance can be improved.
- this ratio is less than 105%, the tread width becomes too narrow and the rigidity of the tread portion decreases, and the steering stability deteriorates.On the other hand, if this ratio exceeds 115%, the tread The width becomes so narrow that the wedge effect cannot be obtained.
- FIG. 1 is a cross-sectional view showing a tire according to an embodiment of the present invention in a cross section passing through a central axis.
- a studless tire 10 is connected to a tread portion 1 and side portions of the tread portion 1 inward in the radial direction.
- Each side wall portion 2 includes a side wall portion 2 that extends and a bead portion 3 disposed on the inner peripheral side of the side wall portion 2 and extends in a toroidal manner between the bead cores 4 disposed in each bead portion 3.
- An adjacent bead filler 6 is provided, and the tread portion 1 is disposed between the tread rubber 7 that forms the tread surface, the radial carcass 5 and the tread rubber 7. It was constituted comprising a belt 8.
- the belt 8 is configured by stacking two layers of belt plies made of cords arranged in directions opposite to each other with respect to the equator plane inward and outward in the radial direction.
- the radially inner belt ply 11 is referred to as a first belt ply
- the outer belt ply 12 is referred to as a second belt ply.
- the present invention is characterized in that in the tire configured as described above, the width 2W of the second belt ply 12 is 60 to 70% of the maximum width MW of the tire.
- the width of the second belt ply 12 is 60 to 70% of the maximum width MW of the tire.
- the ratio of the width 2W of the second belt ply 12 to the maximum width MW of the tire exceeds 70%, the stepping angle becomes large and the required performance cannot be ensured when driving on ice.
- this is less than 60%, the belt rigidity is remarkably lowered and the steering stability is deteriorated.
- the maximum tire width MW and the belt ply widths 1W and 2W refer to the width when the tire is mounted on a predetermined rim and filled with a predetermined internal pressure. Also, the belt ply width 1W, 2W is the linear distance from one belt ply end to the other belt ply end measured in a direction perpendicular to the equator plane, and is measured along the belt ply. Absent.
- the predetermined internal pressure and the predetermined rim are defined as follows. That is, the predetermined internal pressure is the air pressure corresponding to the predetermined load in the application size described in the predetermined industry standard, and the predetermined rim is the standard rim (or “Approved” in the application size described in the standard. Rim ”,“ Recommended Rim ”).
- the predetermined load in the above is the maximum load (maximum load capacity) of the single wheel in the application size described in the predetermined industrial standard.
- the range of the width of the second belt ply 12 is defined based on the tire maximum width, not the tread width or the width of the first belt ply 11, because the tire maximum width is based on the tire width. This is because the width is clearly determined when the size of the tire is determined, and the influence of the belt rigidity caused by the width of the second belt ply 12 on the depression angle is a combined action with other members. Since it is a direct one, not a standard one, it is based on a dimension that is uniquely determined once the size is decided in this way.
- the width 1W of the first belt ply 11 is preferably 24 to 36 mm wider than the width 2W of the second belt ply 12. This corresponds to the fact that the width 2W of the second belt ply 12 is narrower than that of the conventional tire, whereas the width 1W of the first belt ply is substantially the same as that of the conventional tire.
- the overall rigidity can be maintained optimally. If the difference between the width 1W of the first belt ply 11 and the width 2W of the second belt ply 12 is less than 24 mm, the belt rigidity becomes too high, the stepping angle becomes large, and sufficient on-ice performance is obtained.
- the ratio of the width 2W of the second belt ply to the tread width TW is preferably 80 to 95%. If this ratio is less than 80%, the tread width TW becomes too wide and the surface pressure is increased. If the ratio exceeds 95%, the tread width becomes too narrow and steering stability during dry running decreases.
- the dynamic elastic modulus of the tread rubber 7 is in the range of 3 to 20 MPa.
- the dynamic elastic modulus of the tread rubber 7 is normally in the range of 25 to 50 MPa, but for studless tires that are intended to run on snow and snow, the tread rubber 7 is This is because, when the dynamic elastic modulus is set to 20 MPa or less, it becomes easy to deform, and as a result, the ground contact area is increased and the friction coefficient on ice can be increased. However, if this dynamic elastic modulus is less than 3 MPa, it becomes too soft and the steering stability is extremely deteriorated.
- a plurality of tires having different second belt ply widths of 2 W were made as prototypes and subjected to a depression angle, an on-ice feeling test, an on-ice brake test, a straight running stability feeling test, and a steering stability feeling test.
- Table 2 shows the second belt ply width 2 W, the ratio 2 W / MW (%) of the second belt ply width 2 W to the tire maximum width MW, and the evaluation results.
- the depression angle was measured as follows. That is, as shown in FIG. 2, the dial gauge 20 is moved along the contact surface to obtain a profile from the tire non-contact portion to the tire contact portion of the distance from the contact surface G to the tire. The angle was calculated.
- the feeling test on ice is expressed as an index when the driver comprehensively evaluates the braking performance, starting performance, straight running performance, and cornering performance on the test course of the ice sheet road surface, and the evaluation result of the tire of Comparative Example 2 is 100. It was shown in 1.
- the driver comprehensively evaluates the response and stability when steering during cornering when driving straight on a dry road test course.
- the index is shown in Table 1 with the index being 100.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
前記ベルトプライのうちタイヤ半径方向外側に配置挿されたベルトプライの幅を、タイヤ最大幅の60~70%としてなるスタッドレスタイヤである。
2 サイドウォール部
3 ビード部
4 ビードコア
5 ラジアルカーカス
5a ラジアルカーカス5の本体部分
5b ラジアルカーカス5の巻返し部分
6 ビードフィラ
7 トレッドゴム
8 ベルト
10 スタッドレスタイヤ
11 第1ベルトプライ
12 第2ベルトプライ
20 ダイヤルゲージ
θ 踏み込み角度
タイヤサイズ:195/65R15
タイヤ最大幅MW:198mm
第1ベルトプライ幅1W:153mm
トレッド幅TW:153m
ベルトプライの対赤道面コード角度:24°
ベルトコード:スチール(撚り構造:1x3)
Claims (3)
- スチールコードを赤道面に関して相互に反対向きに傾斜させて配列した2枚のベルトプライよりなるベルト層を有するスタッドレスタイヤにおいて、
前記ベルトプライのうちタイヤ半径方向外側に配置されたベルトプライの幅を、タイヤ最大幅の60~70%としてなるスタッドレスタイヤ。 - タイヤ半径方向内側のベルトプライの幅を、前記タイヤ半径方向外側のベルトプライの幅より24~36mm広くしてなる請求項1に記載のスタッドレスタイヤ。
- トレッド幅の、前記タイヤ半径方向外側のベルトプライの幅に対する割合を105~125%としてなる請求項1もしくは2に記載のスタッドレスタイヤ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/865,994 US20110017372A1 (en) | 2008-02-04 | 2009-01-29 | Studless tire |
JP2009552452A JP5745224B2 (ja) | 2008-02-04 | 2009-01-29 | スタッドレスタイヤ |
CN2009801075515A CN101959703A (zh) | 2008-02-04 | 2009-01-29 | 无钉防滑轮胎 |
EP09708072A EP2248682B1 (en) | 2008-02-04 | 2009-01-29 | Studless tire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-023926 | 2008-02-04 | ||
JP2008023926 | 2008-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009099000A1 true WO2009099000A1 (ja) | 2009-08-13 |
Family
ID=40952076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/051496 WO2009099000A1 (ja) | 2008-02-04 | 2009-01-29 | スタッドレスタイヤ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110017372A1 (ja) |
EP (1) | EP2248682B1 (ja) |
JP (2) | JP5745224B2 (ja) |
CN (1) | CN101959703A (ja) |
RU (1) | RU2429979C1 (ja) |
WO (1) | WO2009099000A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022038812A (ja) * | 2020-08-27 | 2022-03-10 | 住友ゴム工業株式会社 | タイヤ |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001001717A (ja) * | 1999-06-17 | 2001-01-09 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
JP2001206022A (ja) | 2000-01-26 | 2001-07-31 | Bridgestone Corp | 空気入りタイヤ |
JP2001301421A (ja) * | 2000-04-21 | 2001-10-31 | Bridgestone Corp | 空気入りタイヤ |
JP2001347810A (ja) * | 2000-06-07 | 2001-12-18 | Bridgestone Corp | 全路面対応型空気入りタイヤおよびその使用方法 |
JP2005193865A (ja) * | 2004-01-09 | 2005-07-21 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5433407A (en) * | 1977-08-17 | 1979-03-12 | Bridgestone Corp | Pneumatic tire having high durable wide width tread |
EP0412775B1 (en) * | 1989-08-10 | 1993-11-03 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
JPH03169715A (ja) * | 1989-11-30 | 1991-07-23 | Sumitomo Rubber Ind Ltd | 重荷重用ラジアルタイヤ |
JPH04110205A (ja) * | 1990-08-31 | 1992-04-10 | Toyo Tire & Rubber Co Ltd | 小型トラック用ラジアルタイヤ |
CA2057107A1 (en) * | 1990-12-10 | 1992-06-11 | Sumitomo Rubber Industries, Ltd. | Radial tire |
JPH05162509A (ja) * | 1991-12-13 | 1993-06-29 | Bridgestone Corp | 二輪車用空気入りタイヤ |
JP2672061B2 (ja) * | 1992-12-11 | 1997-11-05 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2892904B2 (ja) * | 1993-04-16 | 1999-05-17 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP2790982B2 (ja) * | 1994-11-15 | 1998-08-27 | 住友ゴム工業株式会社 | 空気入りラジアルタイヤ |
JPH09202112A (ja) * | 1995-11-21 | 1997-08-05 | Bridgestone Corp | 空気入りラジアルタイヤ |
CA2324807A1 (en) * | 1999-11-05 | 2001-05-05 | Sumitomo Rubber Industries, Ltd. | Studless tire with radially directed short fibers |
JP2002113792A (ja) * | 2000-10-12 | 2002-04-16 | Sumitomo Rubber Ind Ltd | 空気入りタイヤの製造方法 |
CA2530185A1 (en) * | 2003-06-24 | 2005-01-13 | Pirelli Pneumatici S.P.A. | Tyre for vehicle wheel and process for producing the tyre |
JP2005280612A (ja) * | 2004-03-30 | 2005-10-13 | Sumitomo Rubber Ind Ltd | トラック及びバス用タイヤ |
-
2009
- 2009-01-29 EP EP09708072A patent/EP2248682B1/en not_active Not-in-force
- 2009-01-29 RU RU2010136983/11A patent/RU2429979C1/ru active
- 2009-01-29 CN CN2009801075515A patent/CN101959703A/zh active Pending
- 2009-01-29 JP JP2009552452A patent/JP5745224B2/ja active Active
- 2009-01-29 WO PCT/JP2009/051496 patent/WO2009099000A1/ja active Application Filing
- 2009-01-29 US US12/865,994 patent/US20110017372A1/en not_active Abandoned
-
2015
- 2015-01-26 JP JP2015012651A patent/JP6291430B2/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001001717A (ja) * | 1999-06-17 | 2001-01-09 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
JP2001206022A (ja) | 2000-01-26 | 2001-07-31 | Bridgestone Corp | 空気入りタイヤ |
JP2001301421A (ja) * | 2000-04-21 | 2001-10-31 | Bridgestone Corp | 空気入りタイヤ |
JP2001347810A (ja) * | 2000-06-07 | 2001-12-18 | Bridgestone Corp | 全路面対応型空気入りタイヤおよびその使用方法 |
JP2005193865A (ja) * | 2004-01-09 | 2005-07-21 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2248682A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2248682B1 (en) | 2012-11-28 |
EP2248682A1 (en) | 2010-11-10 |
JPWO2009099000A1 (ja) | 2011-05-26 |
RU2429979C1 (ru) | 2011-09-27 |
JP6291430B2 (ja) | 2018-03-14 |
US20110017372A1 (en) | 2011-01-27 |
CN101959703A (zh) | 2011-01-26 |
JP5745224B2 (ja) | 2015-07-08 |
EP2248682A4 (en) | 2011-07-20 |
JP2015077971A (ja) | 2015-04-23 |
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