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WO2008056504A1 - Pneu pour chargement lourd et sa méthode utilisation - Google Patents

Pneu pour chargement lourd et sa méthode utilisation Download PDF

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Publication number
WO2008056504A1
WO2008056504A1 PCT/JP2007/069840 JP2007069840W WO2008056504A1 WO 2008056504 A1 WO2008056504 A1 WO 2008056504A1 JP 2007069840 W JP2007069840 W JP 2007069840W WO 2008056504 A1 WO2008056504 A1 WO 2008056504A1
Authority
WO
WIPO (PCT)
Prior art keywords
tread
tire
equator
width
less
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
Application number
PCT/JP2007/069840
Other languages
English (en)
Japanese (ja)
Inventor
Hidetoshi Yoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Publication of WO2008056504A1 publication Critical patent/WO2008056504A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
    • B60C11/0316—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation 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
    • B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
    • 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
    • B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
    • 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 heavy duty tire, particularly a construction vehicle tire with improved wear resistance.
  • the present invention provides a long-life heavy-duty tire having excellent wear resistance by giving a way to wear the tread uniformly in the width direction to a heavy-duty tire, typically a construction vehicle tire. It is something to try.
  • the gist of the present invention is as follows.
  • the tire tread is provided with a plurality of circumferential grooves extending along the tire equator, and a tread side region is defined between the circumferential groove on the tread end side and the tread end of the circumferential grooves.
  • the lug grooves In a heavy duty tire having a plurality of lug grooves extending in the tread width direction in a side region, the lug grooves have a depth of 20% or more and 40% or less of the tread rubber thickness on the equator plane of the tire. Heavy duty tires.
  • the wear of the region is determined by the thickness of the tread rubber on the equator surface of the tire.
  • the heavy duty tire according to (1), (2) or (3) above having a negative ratio of 10% to 35% when in the range of 20% to 40%.
  • a center region of the tread defined between the circumferential grooves on the tread end side has a plurality of center lug grooves extending in the tread width direction, and the center lug groove has a width of the center lug.
  • the groove is 1.5% to 6.5% of the distance between each other and the length force S is 20% or more of the total width of the tread.
  • FIG. 1 is a view showing a tread pattern of a tire according to the present invention.
  • FIG. 2 is a view showing a cross section taken along line (I)-(I) in FIG.
  • FIG. 3 A diagram showing a tread pattern at the stage when the first one-third of the period of use has elapsed.
  • FIG. 4] ⁇ is a diagram showing another tread pattern according to the present invention, and (b) is a diagram showing a tread pattern at the stage when the first 1/3 of the period of use has elapsed.
  • FIG. 5 is a diagram showing another tread pattern according to the present invention, and (b) is a diagram showing a tread pattern at the stage when the first 1/3 of the period of use has elapsed.
  • the heavy duty tire of the present invention has a tire equator O as shown in a developed view of the tread 1 in FIG.
  • the tread side has two circumferential grooves 2a and 2b, one on each side of the equator O of the tire in the example shown, and is divided by these circumferential grooves 2a and 2b and the tread end T.
  • the area S has a large number of lug grooves 3a and 3b extending in the tread width direction.
  • the lug grooves 3a and 3b are 20% or more of the tread rubber thickness TG at the equator plane O of tire 40 It is important to have a depth h of less than%.
  • tires for construction vehicles are often used as the front wheels of the vehicle for the first 1/3 of the period of use, and then the mounting position is changed to the rear wheels.
  • a tire having a large number of lug grooves 3a and 3b in the tread side region S shown in FIG. 1 is mounted on the rear wheel, a relatively wide lug groove exists in the tread side region S.
  • the land portion of the tread side area S is likely to deform (crush).
  • the ground contact reaction force in the land portion of the tread side region S is reduced, the drive input is received in the tread central region, and the wear distribution in the tread width direction is preferentially advanced in the tread central region, As a result of the belt being exposed in this area, the tread side area was thick! The tire was rejected with the tread rubber remaining.
  • the lug grooves 3a and 3b in the tread side region S are eliminated as shown in Fig. 3 when a period of about 1/3 of the period of use has elapsed.
  • the tread side region S is a rib having no groove (lug groove) extending in the tread width direction. That is, if the tread side region S is a rib in which the land portion continues in the tread circumferential direction, the deformation (crushing) of the land portion at the time of ground contact is suppressed and the rigidity of the tread side region S is increased. Since the ground reaction force in the area S becomes high, the burden on the drive input in the tread side area S can be increased, and the wear distribution in the tread width direction can be made uniform especially when the rear wheel is mounted.
  • the depth h of the lug groove is set to It is important that the tread rubber thickness at the equator plane O is 40% or less of the TG. In other words, if the depth h exceeds 40% of TG, the remaining groove will be larger when the tire is mounted on the rear wheel after about 1/3 of the initial period of use of the tire, resulting in sufficient tread rigidity improvement. Can not get.
  • the lower limit of the depth h of the lag groove is set to 20% of TG, which is about 1/3 of the tire use period. If the groove depth is less than 20% of TG on the front wheels used, heat generation at the end of the belt will increase, causing belt failure due to side forces.
  • reference numeral 4 denotes a carous force extending in a toroidal shape between a pair of bead portions
  • reference numeral 5 denotes a belt having five layers in the illustrated example arranged at the crown portion of the carcass 4.
  • the circumferential grooves 2a and 2b on the tread end T side are preferably arranged at a distance of 40% to 80% of the tread half width from the equator of the tire. This is because if the distance of the equator of the tire is less than 40%, the rigidity of the central region of the tread sandwiched between the circumferential grooves becomes too small, and it becomes difficult to suppress the preferential wear in that region. On the other hand, if it exceeds 80%, the tread side area force S becomes small, and even if this is changed to a rib, it is difficult to obtain an effect sufficient to suppress the above-mentioned flat wear.
  • the width W of the circumferential grooves 2a and 2b on the tread end T side is 0.5% or more of the total tread width TW 2.
  • the circumferential groove width W is less than 0.5% of the total tread width TW, the drainage and the tread cooling function may be hindered.
  • it exceeds 2.5% the opening of the circumferential groove does not close at the time of ground contact, so it becomes difficult to improve the wear resistance by increasing the rigidity of the land portion by closing the circumferential groove opening.
  • the wear on the tread side region is in the range of 20% to 40% of the tread rubber thickness on the equator plane O of the tire.
  • the negative ratio in the tread side region is preferably 10% or more and 35% or less.
  • construction vehicle tires are mounted on the front wheels for about 1/3 of the initial period of use, but most of the tires mounted on the front wheels are free-rolling. There is no effect, but if the tread gauge is thick, heat generation becomes a problem. Therefore, it is preferable to set the negative ratio in the tread side region to 10% or more in order to suppress the heat generation of the tread during the period assumed to be attached to the front wheels. On the other hand, since rigidity against the side force is required when the front wheels are mounted, the negative ratio in the tread side region is preferably 35% or less.
  • L is preferably 20% or more of the total tread width TW.
  • the width t is 1.5% to 8.0% of the distance T between the center lug grooves 6.
  • the upper limit of the length L is not particularly required, but actually, the upper limit is limited to the positions up to the circumferential grooves 2a and 2b.
  • the circumferential grooves 2a and 2b and the center lug groove 6 have a depth H of 50% or more and 90% or less of the tread rubber thickness TG on the equator plane O of the tire. Is preferred.
  • the center lug groove 6 extends in a direction orthogonal to the tire equator.
  • the center lug groove 6 is oblique to the tire equator.
  • the depth of the lug grooves 3a and 3b is set to 20% to 40% of the tread rubber thickness TG on the equator plane O of the tire, for example.
  • the case where the lug grooves 3a and 3b of the tread side region S disappear when the period of about 1/3 of the initial period has passed is the same as the case shown in Fig. 1.
  • the tread side region of the tire mounted on the front wheel of the vehicle wears out on the equator plane of the tire.
  • the tire thickness is in the range of 20% or more and 40% or less, attaching the front wheel-mounted tire to the rear wheel causes the tread side lug groove to disappear at the stage of the rear wheel mounting, and the tread side region You can improve your tenure.
  • a tire for a construction vehicle having a tire size of 46 / 90R57 was manufactured in accordance with the specifications shown in Table 1 according to the conditions shown in Figs. Each tire obtained was installed in a 240-ton dump truck running at a mine after being installed in a standard rim and given maximum air pressure. At this time, assuming that the wear amount of the tread on the tire's equatorial plane is 80 mm and wear stage 1 is the wear amount after that, and the wear amount is 20 mm, then wear stage 1 is equipped with a prototype tire on the front wheel, At the stage of transition to wear stage 2, it was mounted on the rear wheel.
  • the running time is the time from when the tire is mounted on the front wheel, worn to 1/3 of the period of use, and then rotated to the rear wheel until the tread rubber wears out, the belt is exposed and the tire is removed. .
  • Tire size ' 46 / 90R57 Tire outer diameter: 3575mm

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

La présente invention concerne un pneu pour chargement lourd, doté d'une longue durée de vie et d'une excellente résistance à l'abrasion grâce à un concept permettant d'uniformiser l'usure de la sculpture dans le sens de la largeur, en l'adaptant à un pneu pour chargement lourd, généralement un pneu devant équiper un véhicule de construction. Dans le cas d'un pneu pour chargement lourd dont la sculpture est dotée de plusieurs rainures circonférentielles disposées le long de la ligne équatoriale du pneu, une zone latérale de la sculpture est découpée entre la rainure circonférentielle de l'extrémité de la sculpture de ces rainures circonférentielles et l'extrémité de la sculpture, et un nombre important de rainures de barrettes qui couvrent la largeur de la sculpture sont disposées sur la zone latérale de la sculpture, la profondeur de la rainure de barrettes représentant de 20 à 40 % de l'épaisseur du caoutchouc de la sculpture sur la surface équatoriale du pneu.
PCT/JP2007/069840 2006-11-06 2007-10-11 Pneu pour chargement lourd et sa méthode utilisation Ceased WO2008056504A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006300178A JP2008114738A (ja) 2006-11-06 2006-11-06 重荷重用タイヤおよびその使用方法
JP2006-300178 2006-11-06

Publications (1)

Publication Number Publication Date
WO2008056504A1 true WO2008056504A1 (fr) 2008-05-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/069840 Ceased WO2008056504A1 (fr) 2006-11-06 2007-10-11 Pneu pour chargement lourd et sa méthode utilisation

Country Status (2)

Country Link
JP (1) JP2008114738A (fr)
WO (1) WO2008056504A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009075182A1 (fr) * 2007-12-10 2009-06-18 Bridgestone Corporation Bandage pneumatique
EP2460671A4 (fr) * 2009-07-27 2013-04-17 Bridgestone Corp Pneu pour machine de construction
US9962997B2 (en) 2014-07-23 2018-05-08 The Yokohama Rubber Co., Ltd. Heavy duty pneumatic tire
US11192403B2 (en) * 2016-03-25 2021-12-07 Compagnie Generale Des Etablissements Michelin Siped tread for off-road tire
US11964513B2 (en) 2019-06-14 2024-04-23 Bridgestone Corporation Tire

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5503185B2 (ja) * 2009-04-22 2014-05-28 株式会社ブリヂストン 建設車両用タイヤ及びその使用方法
JP5845019B2 (ja) * 2011-07-28 2016-01-20 株式会社ブリヂストン 乗用車用空気入りラジアルタイヤ及びその使用方法
JP5981108B2 (ja) * 2011-07-28 2016-08-31 株式会社ブリヂストン 乗用車用空気入りラジアルタイヤ及びその使用方法
JP6013759B2 (ja) * 2012-04-16 2016-10-25 株式会社ブリヂストン 空気入りタイヤ
JP6058341B2 (ja) * 2012-10-05 2017-01-11 株式会社ブリヂストン 重荷重用空気入りタイヤ
FR3022493B1 (fr) * 2014-06-24 2016-07-01 Michelin & Cie Bande de roulement incisee pour pneu genie civil
RU2633030C1 (ru) * 2014-07-23 2017-10-11 Дзе Йокогама Раббер Ко., Лтд. Пневматическая шина для высоконагруженных машин
AU2015293160B2 (en) * 2014-07-23 2017-08-10 The Yokohama Rubber Co., Ltd. Heavy duty pneumatic tire
US11312187B2 (en) * 2016-03-31 2022-04-26 The Yokohama Rubber Co., Ltd. Heavy-duty pneumatic tire
JP6949698B2 (ja) * 2017-12-14 2021-10-13 株式会社ブリヂストン 建設・鉱山車両用タイヤの管理システム及び建設・鉱山車両用タイヤの管理方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190704U (fr) * 1985-05-21 1986-11-27
JPH07329513A (ja) * 1994-06-13 1995-12-19 Bridgestone Corp 重荷重用空気入りタイヤ
JPH1134614A (ja) * 1997-07-23 1999-02-09 Bridgestone Corp 空気入りタイヤ
JP2001225608A (ja) * 2000-02-17 2001-08-21 Bridgestone Corp 空気入りタイヤ
JP2002160507A (ja) * 2000-09-13 2002-06-04 Bridgestone Corp 空気入りタイヤ
JP2004359007A (ja) * 2003-06-02 2004-12-24 Sumitomo Rubber Ind Ltd 重荷重用タイヤ
JP2006143019A (ja) * 2004-11-19 2006-06-08 Sumitomo Rubber Ind Ltd 重荷重用タイヤ
JP2006151083A (ja) * 2004-11-26 2006-06-15 Bridgestone Corp 重荷重車両用タイヤ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190704U (fr) * 1985-05-21 1986-11-27
JPH07329513A (ja) * 1994-06-13 1995-12-19 Bridgestone Corp 重荷重用空気入りタイヤ
JPH1134614A (ja) * 1997-07-23 1999-02-09 Bridgestone Corp 空気入りタイヤ
JP2001225608A (ja) * 2000-02-17 2001-08-21 Bridgestone Corp 空気入りタイヤ
JP2002160507A (ja) * 2000-09-13 2002-06-04 Bridgestone Corp 空気入りタイヤ
JP2004359007A (ja) * 2003-06-02 2004-12-24 Sumitomo Rubber Ind Ltd 重荷重用タイヤ
JP2006143019A (ja) * 2004-11-19 2006-06-08 Sumitomo Rubber Ind Ltd 重荷重用タイヤ
JP2006151083A (ja) * 2004-11-26 2006-06-15 Bridgestone Corp 重荷重車両用タイヤ

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009075182A1 (fr) * 2007-12-10 2009-06-18 Bridgestone Corporation Bandage pneumatique
US8746304B2 (en) 2007-12-10 2014-06-10 Bridgestone Corporation Pneumatic tire
EP2230102B1 (fr) * 2007-12-10 2018-11-14 Bridgestone Corporation Bandage pneumatique
EP2460671A4 (fr) * 2009-07-27 2013-04-17 Bridgestone Corp Pneu pour machine de construction
US8955568B2 (en) 2009-07-27 2015-02-17 Bridgestone Corporation Tire for construction vehicle
EP2896513A1 (fr) * 2009-07-27 2015-07-22 Bridgestone Corporation Pneu pour véhicule de construction
US9962997B2 (en) 2014-07-23 2018-05-08 The Yokohama Rubber Co., Ltd. Heavy duty pneumatic tire
US11192403B2 (en) * 2016-03-25 2021-12-07 Compagnie Generale Des Etablissements Michelin Siped tread for off-road tire
US11964513B2 (en) 2019-06-14 2024-04-23 Bridgestone Corporation Tire

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