WO2013111886A1 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- WO2013111886A1 WO2013111886A1 PCT/JP2013/051666 JP2013051666W WO2013111886A1 WO 2013111886 A1 WO2013111886 A1 WO 2013111886A1 JP 2013051666 W JP2013051666 W JP 2013051666W WO 2013111886 A1 WO2013111886 A1 WO 2013111886A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- block
- circumferential recess
- radial direction
- wall surface
- 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
-
- 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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/02—Arrangement of grooves or ribs
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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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/003—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof characterised by sidewall curvature
-
- 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
- B60C15/02—Seating or securing beads on rims
- B60C15/024—Bead contour, e.g. lips, grooves, or ribs
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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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
-
- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
- B60C2200/065—Tyres specially adapted for particular applications for heavy duty vehicles for construction vehicles
Definitions
- the present invention relates to a tire having a tread portion that contacts a road surface and a tire side portion that is continuous with the tread portion.
- a recess in the tread width direction is formed and a circumferential recess extending in the tire circumferential direction is formed.
- gum can be heightened.
- the cost can be reduced by reducing the weight as compared with the case where the circumferential recess is not formed.
- radius of curvature (curvature radius R2) of the side wall surface in the cross section along the tread width direction and the tire radial direction of the tire is filled with a normal internal pressure and is in a no-load state where there is no load.
- the gist is 50 mm or more.
- FIG. 1 is a side view of the pneumatic tire 1 according to the first embodiment of the present invention when viewed from the side.
- FIG. 2 is a partially exploded perspective view showing the pneumatic tire 1 according to the present embodiment.
- FIG. 3 is a partial cross-sectional view showing the pneumatic tire 1 according to the present embodiment.
- the state in which the pneumatic tire 1 is assembled to the rim wheel 60 means a state in which the pneumatic tire 1 is assembled to a standard rim defined in the standard with air pressure corresponding to the maximum load defined in the standard.
- the standard indicates JATMA YEAR BOOK (2010 edition, Japan Automobile Tire Association standard). Note that, when the TRA standard, the ETRTO standard, or the like is applied in the place of use or manufacturing, it conforms to each standard.
- the maximum depth D of the inner wall surface 101 with respect to the virtual line Vc1 obtained by extending the first circular arc curve Rc1 to the circumferential recess 100 is in the range of 15 mm to 35 mm.
- the first arc curve Rc1 and the virtual line Vc1 are on the same arc curve, and the virtual line Vc1 portion is indicated by a dotted line in the examples of FIGS. Should.
- the maximum depth D is a space
- At least a part of the block 110 is disposed in the inner wall surface 101.
- the entire first block 111 and a part of the second block 112 are arranged in a region where the inner wall surface 101 is formed.
- at least a part of the block 110 may be arranged in the region where the inner wall surface 101 is formed.
- only a part of the first block 111 is in the region where the inner wall surface 101 is formed. It may be arranged.
- FIG. 6A shows a partially enlarged perspective view of the circumferential recess 100 according to the present embodiment.
- FIG. 6B shows a partially enlarged plan view of the circumferential recess 100 according to the first embodiment.
- a first block 111 is formed on the inner side in the tire radial direction Td of the circumferential recess 100
- a second block 112 is The first block 111 is formed on the outer side in the tire radial direction Td.
- the first block 111 and the second block 112 are formed so as to be separated from each other in the tire radial direction Td.
- the width w of the first block 111 in the tire circumferential direction Tc and the width w of the second block 112 in the tire circumferential direction Tc are assumed to be the same.
- the width w in the tire circumferential direction Tc of the first block 111 and the width w in the tire circumferential direction Tc of the second block 112 are 2 mm or more and 10 mm or less.
- the width w in the tire circumferential direction Tc is an average of the maximum width and the minimum width. Value.
- the pitch P in the tire circumferential direction Tc means that the first block 111 (or the second block 112) is adjacent to the center of the first block 111 (or the second block 112) in the tire circumferential direction. Or it is the linear distance along the circumferential direction with the center in the tire circumferential direction of the 2nd block 112).
- the width w of (or the second block 112) is formed so as to satisfy the relationship of 1 ⁇ p / h ⁇ 50 and 1 ⁇ (p ⁇ w) / w ⁇ 100.
- the angle formed by the surface 111S of the first block 111 and the side wall surface in the tire circumferential direction Tc is also preferably an obtuse angle.
- the angle formed between the surface 112S of the second block 112 and the side wall surface in the tire circumferential direction Tc is also preferably an obtuse angle.
- the protrusion height Hz is preferably in the range of 1 to 25 mm. Furthermore, the protrusion height Hz is more preferably in the range of 2 to 10 mm.
- the surface 111S of the first block 111 and the surface 112S of the second block 112 are preferably formed in a planar shape.
- the protrusion height Hz is preferably 25 mm or less.
- the protrusion height Hz is preferably 1 mm or more.
- the fall of the carcass 40 at the time of load is greatly deteriorated. Without increasing the temperature, it is possible to suppress the temperature rise. If it is provided below the rim separation point 61a, the fall of the carcass 40 at the time of load increases, and the durability of the bead portion 30 is significantly deteriorated.
- the radius of curvature R2 of the inner wall surface 101 of the circumferential recess 100 is formed to be 50 mm or more in a no-load state in which a normal internal pressure is filled and no load is applied.
- the radius of curvature R2 of the inner wall surface 101 is less than 50 mm, the distortion of the inner wall surface 101 caused by the falling of the carcass 40 during loading is concentrated locally, and the crack resistance on the bead portion 30 side of the tire side portion 20 is reduced. Sexuality will deteriorate.
- the air that has entered the circumferential recess 200 rides on the first block 211, and on the second block 212. Deviation occurs at. According to this, the position of the portion (region) where the air flow generated on the back side of the first block 211 stays, and the position of the portion (region) where the air flow generated on the back side of the second block 212 stays Will shift in the tire circumferential direction Tc. Therefore, the staying portion (region) is dispersed in the tire circumferential direction Tc, so that the air that has entered the circumferential recess 200 tends to be turbulent. As a result, the air flow becomes active, and the temperature increase on the bead portion 30 side of the tire side portion 20 can be suppressed starting from the circumferential recess 200. As a result, the durability of the pneumatic tire 2 can be improved.
- the pneumatic tire according to the conventional example as shown in FIG. 11A, a pneumatic tire in which a circumferential recess and a block are not provided in the tire side portion was used.
- the pneumatic tire according to the comparative example uses a pneumatic tire in which a block that protrudes outward in the tread width direction Tw from the outer surface of the tire side portion is formed on the tire side portion. did.
- the pneumatic tire according to Examples 1 to 7 is a pneumatic tire in which a circumferential recess is formed in the tire side portion, and a block that protrudes outward in the tread width direction Tw is formed inside the circumferential recess. used.
- the detailed configuration of Examples 1 to 7 is as shown in Table 1.
- the block maximum height is the above-described height h, and indicates the distance from the inner wall surface 101 or the outer wall surface 102 or the bottom surface 103 where the block is located to the farthest point of the block in the vertical direction. It should be noted.
- FIG. 12A is a partially enlarged perspective view of a circumferential recess 400 according to another embodiment.
- FIG. 12B is a partially enlarged plan view of a circumferential recess 400 according to another embodiment.
- detailed description of the same configuration as that of the first embodiment is omitted as appropriate.
- the length of the third block 513 in the tire radial direction Td is the same as the length from the inner end of the first block 511 in the tire radial direction to the outer end of the second block 512 in the tire radial direction. Further, as shown in FIGS. 13A to 13B, in the circumferential recess 500, a plurality of third blocks 513 are formed at predetermined intervals in the tire circumferential direction, and between the third blocks 513. A plurality of first blocks 511 (and a plurality of second blocks 512) are formed.
- the circumferential recess 500 is partitioned into the circumferential recess 500X and the circumferential recess 500Y in the tire radial direction Td. Specifically, the circumferential recess 500X is located on the inner side in the tire radial direction than the circumferential recess 500Y. A first block 511 is formed in the circumferential recess 500X, and a second block 512 is formed in the circumferential recess 500Y.
- the pneumatic tire 1 according to the embodiment is a heavy duty pneumatic tire (for example, an off-the-road radial (ORR) tire, a truck bus radial (TBR) tire) that is mounted on a construction vehicle such as a dump truck. It is.
- a heavy duty pneumatic tire for example, an off-the-road radial (ORR) tire, a truck bus radial (TBR) tire
- the pneumatic tire 1 according to the embodiment has DC / OD ⁇ 0.015. It is preferable that the relationship is satisfied, and the bead core width (core width) of the bead portion 30 in the tread width direction Tw is 55 mm or more.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
まず、本発明の第1実施形態について説明する。
本実施形態に係る空気入りタイヤ1は、ダンプトラックなどの建設車両に装着される重荷重用の空気入りタイヤである。空気入りタイヤ1の構成について、図面を参照しながら説明する。図1は、本発明の第1実施形態に係る空気入りタイヤ1を側面視した際の側面図である。図2は、本実施形態に係る空気入りタイヤ1を示す一部分解斜視図である。図3は、本実施形態に係る空気入りタイヤ1を示す一部断面図である。
次に、周方向凹部100の構成について具体的に説明する。周方向凹部100は、タイヤ最大幅部mの位置からリム離反点61aまでの範囲に形成される。なお、周方向凹部100のタイヤ径方向Tdの長さと、トレッド幅方向Twの深さとは、空気入りタイヤ1の大きさや、装着される車両の種類に応じて、適宜決定することが好ましい。
次に、周方向凹部100に形成されるブロックの構成について、図面を参照しながら説明する。本実施形態において、周方向凹部100の内部には、トレッド幅方向Tw外側に向かって突出するブロック110が形成されている。なお、周方向凹部100の内部とは、タイヤ径方向Tdにおいて、周方向凹部100のタイヤ径方向Td内側の端部100aと、周方向凹部100のタイヤ径方向Td外側の端部100bとの間の領域内を示す。
次に、第1実施形態に係る周方向凹部100による乱流発生の状態について、図面を参照して説明する。
次に、本実施形態に係る空気入りタイヤの作用並びに効果について説明する。本実施形態に係る空気入りタイヤ1において、タイヤサイド部20の外表面には、トレッド幅方向Tw内側に凹むとともに、タイヤ周方向Tcに延びる周方向凹部100が形成されている。
次に、本発明の第2実施形態に係る空気入りタイヤ2について説明する。なお、第1実施形態と同一の構成については、詳細な説明を適宜省略する。図8(a)は、第2実施形態に係る周方向凹部200の一部拡大斜視図である。図8(b)は、第2実施形態に係る周方向凹部200の一部拡大平面図である。
次に、第2実施形態の変更例に係る空気入りタイヤ2Xについて説明する。なお、第2実施形態と同一の構成については、詳細な説明を適宜省略する。図9(a)は、第2実施形態の変更例に係る周方向凹部200Xの一部拡大斜視図である。図9(b)は、第2実施形態の変更例に係る周方向凹部200Xの一部拡大平面図である。
次に、第3実施形態に係る空気入りタイヤ3について説明する。なお、第1実施形態と同一の構成については、詳細な説明を適宜省略する。図10(a)は、第3実施形態に係る周方向凹部300の一部拡大斜視図である。図10(b)は、第3実施形態に係る周方向凹部300の一部拡大平面図である。
次に、本発明の効果を更に明確にするために、以下の従来例、比較例及び実施例に係る空気入りタイヤを用いて行った比較評価について説明する。なお、本発明はこれらの例によって何ら限定されるものではない。
(1)評価方法
複数種類の空気入りタイヤを用いて試験を行い、タイヤサイド部の温度上昇を抑制する効果について評価をした。
タイヤの種類 : 重荷重用タイヤ
車両 :320トン ダンプトラック
車両走行時速 : 15km/h
走行時間 : 24時間
(2)評価結果
各空気入りタイヤの評価結果について、表1を参照しながら説明する。
上述したように、本発明の実施形態を通じて本発明の内容を開示したが、この開示の一部をなす論述及び図面は、本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなる。
Claims (11)
- 路面と接するトレッド部と、前記トレッド部に連なるタイヤサイド部とを有するタイヤであって、
前記タイヤサイド部の外表面には、トレッド幅方向内側に凹むとともに、タイヤ周方向に延びる周方向凹部が形成され、
前記タイヤのトレッド幅方向及びタイヤ径方向に沿った断面において、リムフランジと接する最もタイヤ径方向外側の点であるリム離反点から前記周方向凹部のタイヤ径方向内側の端部までの範囲に形成されるリム側外表面は、トレッド幅方向内側に曲率半径の中心を有する第1円弧曲線に沿って形成され、
前記タイヤのトレッド幅方向及びタイヤ径方向に沿った断面において、前記周方向凹部のタイヤ径方向内側の端部から前記周方向凹部の底面までの範囲に形成される側壁面は、トレッド幅方向外側に曲率半径の中心を有する第2円弧曲線に沿って形成される
ことを特徴とするタイヤ。 - 前記タイヤのトレッド幅方向及びタイヤ径方向に沿った断面における前記側壁面の曲率半径は、正規内圧を充填し、無荷重である無荷重状態において、50mm以上である
ことを特徴とする請求項1に記載のタイヤ。 - 前記第1円弧曲線を前記周方向凹部まで延長した仮想線に対する前記側壁面の最大深さは、15mm以上35mm以下である
ことを特徴とする請求項1に記載のタイヤ。 - 正規内圧を充填し、無荷重である無荷重状態におけるタイヤ径方向のタイヤ高さをHとした場合、
正規内圧を充填し、正規荷重をかけた正規荷重状態における前記側壁面が、前記リム離反点からタイヤ径方向外側に向かって前記タイヤ高さHの25%以下の範囲内に位置する
ことを特徴とする請求項1に記載のタイヤ。 - 前記ブロックの少なくとも一部は、前記側壁面内に配置される
ことを特徴とする請求項1に記載のタイヤ。 - 正規内圧を充填し、無荷重である無荷重状態における前記側壁面の曲率半径Raと、正規内圧を充填し、正規荷重をかけた正規荷重状態における前記側壁面の曲率半径Rbとは、(Ra-Rb)/Ra≦0.5の関係を満たす
ことを特徴とする請求項1に記載のタイヤ。 - 前記周方向凹部の内部には、トレッド幅方向外側に向かって突出するブロックが形成されていることを特徴とする請求項1に記載のタイヤ。
- 前記ブロックは、タイヤ周方向に所定ピッチ毎に、複数配置されており、
隣接する2つのブロックのタイヤ径方向における位置が異なる
ことを特徴とする請求項7に記載のタイヤ。 - 前記ブロックのトレッド幅方向における高さhは、3mm以上25mm以下である
ことを請求項7に記載のタイヤ。 - 前記ブロックのタイヤ周方向における幅wは2mm以上10mm以下である
ことを特徴とする請求項7に記載のタイヤ。 - 前記ブロックの高さhと、前記ブロックのタイヤ周方向における所定ピッチpと、前記ブロックの幅wとは、1≦p/h≦50、且つ、1≦(p-w)/w≦100の関係を満たす
ことを特徴とする請求項7に記載のタイヤ。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2862595A CA2862595C (en) | 2012-01-27 | 2013-01-25 | Tire |
| AU2013212881A AU2013212881B2 (en) | 2012-01-27 | 2013-01-25 | Tyre |
| EP13741354.8A EP2808181B1 (en) | 2012-01-27 | 2013-01-25 | Tire |
| RU2014134858/11A RU2579385C2 (ru) | 2012-01-27 | 2013-01-25 | Шина |
| US14/373,111 US10611194B2 (en) | 2012-01-27 | 2013-01-25 | Tire |
| CN201380006524.5A CN104105605B (zh) | 2012-01-27 | 2013-01-25 | 轮胎 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-015458 | 2012-01-27 | ||
| JP2012015458A JP5775007B2 (ja) | 2012-01-27 | 2012-01-27 | タイヤ |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013111886A1 true WO2013111886A1 (ja) | 2013-08-01 |
Family
ID=48873597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/051666 Ceased WO2013111886A1 (ja) | 2012-01-27 | 2013-01-25 | タイヤ |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US10611194B2 (ja) |
| EP (1) | EP2808181B1 (ja) |
| JP (1) | JP5775007B2 (ja) |
| CN (1) | CN104105605B (ja) |
| AU (1) | AU2013212881B2 (ja) |
| CA (1) | CA2862595C (ja) |
| RU (1) | RU2579385C2 (ja) |
| WO (1) | WO2013111886A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015019975A1 (ja) * | 2013-08-06 | 2015-02-12 | 株式会社ブリヂストン | タイヤ |
| EP2873539A4 (en) * | 2013-02-22 | 2016-03-02 | Bridgestone Corp | TIRE |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5868303B2 (ja) * | 2012-10-16 | 2016-02-24 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP6597142B2 (ja) * | 2015-10-01 | 2019-10-30 | 横浜ゴム株式会社 | 空気入りタイヤ |
| JP6418339B1 (ja) * | 2016-12-15 | 2018-11-07 | 横浜ゴム株式会社 | 空気入りタイヤ |
| FR3061079A1 (fr) * | 2016-12-27 | 2018-06-29 | Compagnie Generale Des Etablissements Michelin | Pneumatique comportant des barrettes de flanc avec un agencement a pas variable |
| FR3061083A1 (fr) * | 2016-12-27 | 2018-06-29 | Compagnie Generale Des Etablissements Michelin | Pneumatique comportant des barrettes de flanc a angle variable |
| FR3061080A1 (fr) * | 2016-12-27 | 2018-06-29 | Compagnie Generale Des Etablissements Michelin | Pneumatique comportant des barrettes de flanc a hauteur variable |
| US11225112B2 (en) | 2017-07-24 | 2022-01-18 | Bridgestone Americas Tire Operations, Llc | Sidewall treatment for cooling and aerodynamics |
| CN110126553A (zh) * | 2019-05-24 | 2019-08-16 | 安徽世界村新材料有限公司 | 一种减震平衡轮胎 |
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- 2013-01-25 CN CN201380006524.5A patent/CN104105605B/zh not_active Expired - Fee Related
- 2013-01-25 AU AU2013212881A patent/AU2013212881B2/en not_active Ceased
- 2013-01-25 RU RU2014134858/11A patent/RU2579385C2/ru active
- 2013-01-25 EP EP13741354.8A patent/EP2808181B1/en not_active Not-in-force
- 2013-01-25 CA CA2862595A patent/CA2862595C/en not_active Expired - Fee Related
- 2013-01-25 WO PCT/JP2013/051666 patent/WO2013111886A1/ja not_active Ceased
- 2013-01-25 US US14/373,111 patent/US10611194B2/en active Active
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2873539A4 (en) * | 2013-02-22 | 2016-03-02 | Bridgestone Corp | TIRE |
| US10226969B2 (en) | 2013-02-22 | 2019-03-12 | Bridgestone Corporation | Heavy load tire with curved sidewall recess |
| WO2015019975A1 (ja) * | 2013-08-06 | 2015-02-12 | 株式会社ブリヂストン | タイヤ |
| JP2015030420A (ja) * | 2013-08-06 | 2015-02-16 | 株式会社ブリヂストン | タイヤ |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2862595C (en) | 2017-03-21 |
| CN104105605B (zh) | 2017-02-15 |
| EP2808181B1 (en) | 2018-09-05 |
| JP5775007B2 (ja) | 2015-09-09 |
| EP2808181A4 (en) | 2015-11-04 |
| US20150013868A1 (en) | 2015-01-15 |
| EP2808181A1 (en) | 2014-12-03 |
| RU2579385C2 (ru) | 2016-04-10 |
| RU2014134858A (ru) | 2016-03-20 |
| US10611194B2 (en) | 2020-04-07 |
| AU2013212881A1 (en) | 2014-08-28 |
| CN104105605A (zh) | 2014-10-15 |
| CA2862595A1 (en) | 2013-08-01 |
| AU2013212881B2 (en) | 2016-01-14 |
| JP2013154701A (ja) | 2013-08-15 |
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