WO2009096064A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2009096064A1 WO2009096064A1 PCT/JP2008/068021 JP2008068021W WO2009096064A1 WO 2009096064 A1 WO2009096064 A1 WO 2009096064A1 JP 2008068021 W JP2008068021 W JP 2008068021W WO 2009096064 A1 WO2009096064 A1 WO 2009096064A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- main groove
- narrow
- tread
- main
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- 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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
-
- 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
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/133—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising recesses
Definitions
- the present invention relates to a pneumatic tire in which air column resonance noise is reduced without deteriorating drainage performance.
- the air column resonance sound is annoying noise having a frequency of about 1 kHz, and it has been conventionally required to reduce the air column resonance sound.
- a large number of elongated holes extending in the main groove depth direction are provided on the side wall of the main groove. The long hole increases the frictional resistance against the air flow in the main groove, and as a result, the air column resonance noise is reduced.
- an object of the present invention is to provide a pneumatic tire in which air column resonance noise is reduced without deteriorating drainage performance.
- the pneumatic tire of the present invention is a pneumatic tire in which a main groove extending in the tire circumferential direction is engraved in the tread.
- the main groove extending in the tire circumferential direction is carved in the tread, Provided with a plurality of narrow grooves on the side wall of the main groove,
- the length L1 of the fine groove in the depth direction of the main groove is 50 to 80% of the depth D of the main groove,
- the narrow groove has at least one bent portion, The end of the narrow groove on the tread side does not open on the tread surface and is on the most tread side, and the end on the groove bottom side of the narrow groove does not open on the groove bottom of the main groove, and the groove bottom On the side,
- the length L2 along the narrow groove is not less than 1.03 times and not more than 2 times L1.
- the narrow groove carved on the side wall of the main groove increases the frictional resistance against the air flow in the main groove, but the bent portion causes a vortex of the air flow near the bent portion, and the air in the main groove The frictional resistance against the flow becomes larger, and the air column resonance noise is further reduced.
- FIG. 3 is a view showing a part of the side wall 3 of the main groove 1.
- (A)-(f) is a figure which shows the shape of a narrow groove.
- (A), (b) is a schematic diagram which shows a mode that the flow of air is disturbed by the bending part. It is a figure which shows the tread pattern which concerns on an Example and a comparative example.
- FIG. 1 is a view showing a side wall of a main groove of a pneumatic tire according to the present invention
- FIG. 2 is a view showing a part of a side wall 3 of the main groove 1.
- the main groove 1 extends in the tire circumferential direction R and forms a block 2 together with a lateral groove (not shown).
- a narrow groove 11 is provided on the side wall 3 of the main groove 1, and the narrow groove 11 includes at least one bent portion 21 and is bent.
- the end portion 11a on the tread side of the narrow groove 11 does not open to the surface of the tread T and is located on the most tread side, and the end portion 11b on the bottom side of the narrow groove 11 is in the groove bottom 1b of the main groove 1. It does not open and is at the bottom of the groove.
- the narrow groove 11 is provided on the opposing side wall (not shown) of the main groove 1.
- the narrow groove 11 increases the frictional resistance against the air flow in the main groove 1, and as a result, the air column resonance noise is reduced. Further, the bent portion 21 generates an air flow vortex in the vicinity of the bent portion 21, the frictional resistance against the air flow in the main groove 1 is further increased, and the air column resonance noise is further reduced.
- the bent portion 21 refers to a portion where the extending direction of the narrow groove 11 changes discontinuously.
- the bent portion 21 is a portion that is convex in the groove traveling direction, and the tangential direction is the depth direction of the main groove 1. Note that, as shown in FIGS. 4A and 4B, it is considered that the vortex of the flow of the air A is generated as shown in the figure even if the air A flows in any direction with respect to the bent portion 21. It is done.
- the shape of the narrow groove 11 can be various shapes.
- the narrow groove 11 has a shape extending in a polygonal line, and can have a shape provided with one or a plurality of bent portions 21.
- each of the narrow grooves 11 has a semicircular shape, a shape connecting two semicircles, a sinusoidal shape, and a shape including two bent portions 21. can do.
- the bending portion 21 has a bending angle ⁇ of 60 degrees to 150 degrees.
- the length L1 of the narrow groove 11 in the depth direction of the main groove is preferably 50 to 80% of the depth D of the main groove 1. If L1 is less than 50% of the depth D of the main groove 1, the frictional resistance against the air flow in the main groove 1 is small, and the effect of reducing air column resonance noise is small. On the contrary, if L1 exceeds 80% of the depth D of the main groove 1, the rigidity of the block 2 will become low and the performance of a tire will fall. Further, the distance between the end of the narrow groove 11 and the groove bottom or tread surface of the main groove 1 is shortened, and cracks are likely to occur. Further, the length L2 along the narrow groove itself of the narrow groove 11 is 1.03 times or more of L1 and preferably 2 times or less of L1.
- the width w of the narrow groove 11 is at least 0.5 mm or more, and is preferably 0.25 times or less the width W of the main groove 1.
- the depth d of the narrow groove 11 is at least 0.2 mm or more and preferably 0.5 times or less the width W of the main groove 1.
- the interval p between the narrow grooves 11 is at least 0.4 mm or more and preferably 0.5 times or less the width W of the main groove 11. If the width w is too narrow, the depth d is too shallow, or the interval p is too wide, the frictional resistance against the air flow in the main groove 1 is small and the air column resonance noise is reduced too much. It may not be done.
- the width w is too wide or the depth d is too deep, the rigidity of the block 2 is lowered and the performance of the tire is deteriorated. If the interval p is too narrow, the portion sandwiched between the adjacent narrow grooves 11 is easily damaged. Moreover, the manufacturing cost of a metal mold
- Example tires and comparative tires according to the present invention were manufactured and evaluated.
- the tread pattern is as shown in FIG. 5, ribs 12 are formed by the main grooves 1, and fine grooves are carved on both side walls of all the main grooves 1.
- the tire size was 215 / 60R16, the rim size was 16 ⁇ 7-JJ, and the air pressure was 230 kPa.
- the narrow groove 11 having the bent portion 21 on the left side wall of the main groove 1 in FIG. 5 and the bent portion 21 advances on the right side wall of the main groove 1.
- the narrow grooves 11 on the side opposite to the direction P are respectively carved.
- Examples 1 to 6 were tires provided with the narrow grooves shown in FIG. Comparative Example 1 was a tire with a narrow groove without a bent portion, and Comparative Example 2 was a tire with a narrow groove with a bent portion, but L2 was shorter than Example 1. The dimensions of each narrow groove were as shown in Table 1.
- the drainage performance is the speed at which hydroplaning begins to occur when the vehicle is mounted on a rear-wheel-drive sedan type passenger car with a displacement of 2500 cc and travels on a wet road with a water depth of 8 mm at an increased speed. It shows by the index
- the noise level is a bench test (speed is 50 km / h) compliant with JASO-C606, and the 1 kHz air column resonance sound level of 1/3 octave band is measured. Represented by value. If the value is negative, the air column resonance sound level is reduced.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
本出願は、2008年2月1日に出願された日本国特許出願2008-023137の優先権を主張し、同出願を参照として本明細書に取り込まれる。
タイヤ周方向に延びる主溝がトレッドに刻まれた空気入りタイヤにおいて、
前記主溝の側壁に複数の細溝を備え、
前記細溝の主溝深さ方向の長さL1は前記主溝の深さDの50~80%であり、
前記細溝は少なくとも1以上の屈曲部を備え、
前記細溝のトレッド側の端部は、トレッド表面に開口せず、最もトレッド側にあり、前記細溝の溝底側の端部は、前記主溝の溝底に開口せず、最も溝底側にあり、
前記細溝の自身に沿った長さL2は、L1の1.03倍以上かつ2倍以下であることを特徴とする。
2 ブロック
3 主溝の側壁
11 細溝
21 屈曲部
Claims (2)
- タイヤ周方向に延びる主溝がトレッドに刻まれた空気入りタイヤにおいて、
前記主溝の側壁に複数の細溝を備え、
前記細溝の主溝深さ方向の長さL1は前記主溝の深さDの50~80%であり、
前記細溝は少なくとも1以上の屈曲部を備え、
前記細溝のトレッド側の端部は、トレッド表面に開口せず、最もトレッド側にあり、前記細溝の溝底側の端部は、前記主溝の溝底に開口せず、最も溝底側にあり、
前記細溝の自身に沿った長さL2は、L1の1.03倍以上かつ2倍以下であることを特徴とする空気入りタイヤ。 - 前記細溝の幅wは、少なくとも0.5mm以上であり、前記主溝の幅Wの0.25倍以下であり、
前記細溝の深さdは、少なくとも0.2mm以上であり、前記主溝の幅Wの0.5倍以下であり、
前記細溝の間隔pは、少なくとも0.4mm以上であり、前記主溝の幅Wの0.5倍以下である請求項1に記載の空気入りタイヤ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/864,535 US8413696B2 (en) | 2008-02-01 | 2008-10-03 | Pneumatic tire |
CN2008801256130A CN101925479B (zh) | 2008-02-01 | 2008-10-03 | 充气轮胎 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-023137 | 2008-02-01 | ||
JP2008023137A JP4759004B2 (ja) | 2008-02-01 | 2008-02-01 | 空気入りタイヤ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009096064A1 true WO2009096064A1 (ja) | 2009-08-06 |
Family
ID=40912428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/068021 WO2009096064A1 (ja) | 2008-02-01 | 2008-10-03 | 空気入りタイヤ |
Country Status (4)
Country | Link |
---|---|
US (1) | US8413696B2 (ja) |
JP (1) | JP4759004B2 (ja) |
CN (1) | CN101925479B (ja) |
WO (1) | WO2009096064A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1396282B1 (it) * | 2009-09-22 | 2012-11-16 | Bridgestone Corp | Pneumatico invernale con aumentata capacita' di trazione su fondi innevati. |
JP5462762B2 (ja) * | 2010-10-18 | 2014-04-02 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
JP5395839B2 (ja) * | 2011-04-01 | 2014-01-22 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
JP6091872B2 (ja) * | 2012-12-10 | 2017-03-08 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10315711A (ja) * | 1997-05-21 | 1998-12-02 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2001511733A (ja) * | 1997-02-12 | 2001-08-14 | コンパニー ゼネラール デ エタブリッスマン ミシュラン−ミシュラン エ コムパニー | トレッドパターン及びその製造方法 |
JP2001277815A (ja) * | 2000-03-31 | 2001-10-10 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2006069305A (ja) * | 2004-08-31 | 2006-03-16 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2008049791A (ja) * | 2006-08-23 | 2008-03-06 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2008290541A (ja) * | 2007-05-23 | 2008-12-04 | Sumitomo Rubber Ind Ltd | 重荷重用タイヤ |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5129470B2 (ja) * | 2006-08-24 | 2013-01-30 | 住友ゴム工業株式会社 | 空気入りタイヤ |
-
2008
- 2008-02-01 JP JP2008023137A patent/JP4759004B2/ja not_active Expired - Fee Related
- 2008-10-03 US US12/864,535 patent/US8413696B2/en not_active Expired - Fee Related
- 2008-10-03 WO PCT/JP2008/068021 patent/WO2009096064A1/ja active Application Filing
- 2008-10-03 CN CN2008801256130A patent/CN101925479B/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001511733A (ja) * | 1997-02-12 | 2001-08-14 | コンパニー ゼネラール デ エタブリッスマン ミシュラン−ミシュラン エ コムパニー | トレッドパターン及びその製造方法 |
JPH10315711A (ja) * | 1997-05-21 | 1998-12-02 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2001277815A (ja) * | 2000-03-31 | 2001-10-10 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2006069305A (ja) * | 2004-08-31 | 2006-03-16 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2008049791A (ja) * | 2006-08-23 | 2008-03-06 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2008290541A (ja) * | 2007-05-23 | 2008-12-04 | Sumitomo Rubber Ind Ltd | 重荷重用タイヤ |
Also Published As
Publication number | Publication date |
---|---|
JP2009184381A (ja) | 2009-08-20 |
JP4759004B2 (ja) | 2011-08-31 |
CN101925479A (zh) | 2010-12-22 |
US8413696B2 (en) | 2013-04-09 |
US20100307652A1 (en) | 2010-12-09 |
CN101925479B (zh) | 2013-01-16 |
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