CN107399205B - 重载荷用轮胎 - Google Patents

重载荷用轮胎 Download PDF

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CN107399205B
CN107399205B CN201710310321.5A CN201710310321A CN107399205B CN 107399205 B CN107399205 B CN 107399205B CN 201710310321 A CN201710310321 A CN 201710310321A CN 107399205 B CN107399205 B CN 107399205B
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tread
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金谷资辉
安宅郁夫
键本修司
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Sumitomo Rubber Industries Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0083Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the curvature of the tyre tread
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/0327Tread patterns characterised by special properties of the tread pattern
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/0311Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
    • B60C11/0316Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation further characterised by the groove cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/04Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/04Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • B60C11/042Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag further characterised by the groove cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/13Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1307Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
    • B60C11/1323Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls asymmetric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/14Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/16Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
    • B60C11/1643Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile with special shape of the plug-body portion, i.e. not cylindrical
    • B60C11/1656Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile with special shape of the plug-body portion, i.e. not cylindrical concave or convex, e.g. barrel-shaped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C2001/005Compositions of the bead portions, e.g. clinch or chafer rubber or cushion rubber
    • B60C2001/0058Compositions of the bead apexes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C2011/0337Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339Grooves
    • B60C2011/0341Circumferential grooves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C15/0653Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer with particular configuration of the cords in the respective bead reinforcing layer
    • B60C2015/0667Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer with particular configuration of the cords in the respective bead reinforcing layer comprising cords at an angle of 60 to 90 degrees to the circumferential direction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00Tyres specially adapted for particular applications
    • B60C2200/06Tyres specially adapted for particular applications for heavy duty vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
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    • Y02T10/86Optimisation of rolling resistance, e.g. weight reduction 

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Abstract

本发明提供一种重载荷用轮胎,其能够防止滚动阻力的增加,并且能够提高胎面部的耐磨损性。所述重载荷用轮胎为具有胎面部(2)的重载荷用轮胎(1)。在包含5%内压状态的轮胎旋转轴的轮胎截面上,胎面部(2)的轮廓(20)包含:胎冠轮廓(21)和从胎冠轮廓(21)的两外侧向胎面端延伸的一对胎肩轮廓(22)。胎冠轮廓(21)和胎肩轮廓(22)是向轮胎半径方向外侧突出的圆弧状。胎冠轮廓(21)的曲率半径(Rc)与胎肩轮廓(22)的曲率半径(Rs)之比Rc/Rs为7.0以上。从轮胎赤道(C)至连接点(23)为止的轮胎轴向的距离(L1)为胎面半宽(TWh)的0.70倍以上。

Description

重载荷用轮胎
技术领域
本发明涉及一种能够防止滚动阻力的增加,并且能够提高胎面部的耐磨损性的重载荷用轮胎。
背景技术
例如,在下述专利文献1中,为了抑制胎肩陆地部的河式磨损(river wear),提出一种重载荷用轮胎,其胎冠陆地部的轮廓的曲率半径为胎肩陆地部的轮廓的曲率半径的约1.5~2.0倍。
然而,专利文献1的重载荷用轮胎存在一种在胎冠陆地部上作用较大接地压力的倾向,从而存在使胎冠陆地部快速磨损的倾向。另一方面,考虑增大胎冠陆地部的轮廓的曲率半径,而使作用在胎冠陆地部的接地压力分散在胎面部整体。
然而,当增大胎冠陆地部的轮廓的曲率半径时,则会存在由于胎肩陆地部侧的橡胶体积增加、轮胎重量增加以及胎肩陆地部的大量放热而导致滚动阻力增大这样的倾向。
现有技术文献
专利文献
专利文献1:日本特开2007-331439号公报
发明内容
本发明要解决的问题
本发明是鉴于以上这样的问题而提出的,其目的在于,提供一种能够防止滚动阻力的增加,并且能够提高胎面部的耐磨损性的重载荷用轮胎。
用于解决问题的手段
本发明是一种重载荷用轮胎,其具有胎面部,其特征在于,轮胎截面包含轮胎旋转轴,所述轮胎旋转轴是对正规轮辋进行轮辋组装、填充有正规内压的5%的内压且无负载的5%内压状态的轮胎旋转轴,在该轮胎截面中,所述胎面部的轮廓包含:胎冠轮廓,其包含轮胎赤道;以及一对胎肩轮廓,其从所述胎冠轮廓的两外侧向胎面端延伸,所述胎冠轮廓和所述胎肩轮廓是向轮胎半径方向外侧突出的圆弧状,所述胎冠轮廓的曲率半径Rc与所述胎肩轮廓的曲率半径Rs之比Rc/Rs为7.0以上,从所述轮胎赤道至所述胎冠轮廓与所述胎肩轮廓的连接点为止的轮胎轴向的距离,为胎面半宽的0.70倍以上。
对于本发明的重载荷用轮胎,优选所述距离为所述胎面半宽的0.80倍以下。
对于本发明的重载荷用轮胎,优选所述胎肩轮廓的曲率半径Rs为150~300mm。
对于本发明的重载荷用轮胎,优选所述胎冠轮廓的曲率半径Rc为1200~2400mm。
对于本发明的重载荷用轮胎,优选在所述胎面部上,所述轮胎赤道的至少一侧设有胎肩主槽,其位于所述胎面端侧且在轮胎周向上连续延伸,所述连接点位于所述胎肩主槽内。
对于本发明的重载荷用轮胎,优选所述胎肩主槽具有:所述轮胎
赤道侧的内槽壁;以及外槽壁,其配置在所述胎面端侧且向轮胎半
径方向外侧倾斜于所述胎面端侧,所述外槽壁相对于轮胎半径方向
以大于所述内槽壁的角度倾斜。
对于本发明的重载荷用轮胎,优选所述胎肩轮廓配置为,与在所述胎面端侧将所述胎冠轮廓平滑延长的假想延长线相比,更靠轮胎半径方向内侧。
对于本发明的重载荷用轮胎,优选在包含轮胎旋转轴的轮胎截面上,其中,所述轮胎旋转轴是对正规轮辋进行轮辋组装且填充正规内压且无负载的正规状态的轮胎旋转轴,所述胎面部的胎面宽度为轮胎最大宽度的0.80~0.95倍。
发明效果
根据本发明的重载荷用轮胎,胎冠轮廓与胎肩轮廓相比具有足够大的曲率半径,并且能够充分确保从轮胎赤道至所述连接点为止的距离为胎面半宽的0.70倍以上。因此,在轮胎行驶时,能使接地压力不集中在胎面部的中央部,而分散在胎面部整体。因此,能提高胎面部的耐磨损性。
另外,根据本发明的重载荷用轮胎,胎肩轮廓与胎冠轮廓相比,具有明显小的曲率半径,其形成范围也被设定成较小的范围。因此,能够抑制所述胎肩陆地部的橡胶体积的增加,从而能够防止轮胎重量的增加和胎肩陆地部的放热。因此,能够防止滚动阻力的增加。
如上所述,本发明的重载荷用轮胎能够防止滚动阻力的增加,并且能够提高胎面部的耐磨损性。
附图说明
图1是表示本发明的重载荷用轮胎的一个实施方式的剖视图。
图2是图1的胎面部的放大剖视图。
图3是图1的胎肩主槽的放大剖视图。
具体实施方式
以下,根据附图说明本发明的一个实施方式。
图1是包含本实施方式的重载荷用轮胎1(以下,仅称为“轮胎”)的正规状态的轮胎旋转轴的轮胎子午线剖视图。正规状态是指,将轮胎1在正规轮辋上进行轮辋组装,并且填充正规内压且无负载的状态。
所述“正规轮辋”是指,在包含轮胎所依据的规格在内的规格体系中,针对每个轮胎由该规格规定的轮辋,例如,若是JATMA则为“标准轮辋”,若是TRA则为“Design Rim”,若是ETRTO则为“Measuring Rim”。
“正规内压”是指,在包含轮胎所依据的规格在内的规格体系中,针对每个轮胎由各规格规定的气压,若是JATMA则为“最高气压”,若是TRA则为“TIRE LOAD LIMITS ATVARIOUS COLD INFLATION PRESSURES”中所记载的最大值,若是ETRTO则为“INFLATIONPRESSURE”。
如图1所示,本实施方式的轮胎1具有例如胎体6和带束层7。
胎体6例如从胎面部2经过侧壁部3直至胎圈部4的胎圈芯5。胎体6例如由1层的胎体帘布6A形成。胎体帘布6A例如由相对于轮胎周向以75~90°的角度倾斜排列的胎体帘线构成。
胎体帘布6A包含:例如主体部6a和折返部6b。主体部6a例如从胎面部2经过侧壁部3直至胎圈芯5。折返部6b例如与主体部6a相连且绕过胎圈芯5折返。
在主体部6a与折返部6b之间,配置有例如从胎圈芯5以向前聚合状延伸的硬质的胎圈三角胶8。由此,使胎圈部4增强。
带束层7例如由使用了钢丝帘线的4层带束层帘布7A~7D构成。各带束层帘布7A~7D例如由相对于轮胎赤道C倾斜配置的带束层帘线构成。优选各带束层帘布7A至7D的各带束层帘线配置为,例如与相邻带束层帘布的各带束层帘线向相反方向倾斜。
胎圈芯5例如具有大致多边形的截面形状。本实施方式的胎圈芯5例如具有扁平六边形的截面形状。
在胎面部2上设置有,例如在轮胎周向上连续延伸的多个主槽10。主槽10包含:例如设置在轮胎赤道C上的中央主槽11;设置在最靠胎面端Te侧的胎肩主槽12;以及设置在中央主槽11与胎肩主槽12之间的中间主槽13。
“胎面端Te”是指,对所述正规状态的轮胎1施加正规载荷,并以0度外倾角在平面上与地面接触,此时最靠轮胎轴向外侧的接地位置。
“正规载荷”是指,在包含轮胎所依据的规格在内的规格体系中,针对每个轮胎由各规格规定的载荷,若是JATMA则为“最大负载能力”,若是TRA则为“TIRE LOAD LIMITS ATVARIOUS COLD INFLATION PRESSURES”中所记载的最大值,若是ETRTO则为“LOADCAPACITY”。
胎面部2具有被划分在胎肩主槽12的轮胎轴向外侧的胎肩陆地部15和被划分在胎肩主槽12与中央主槽11之间的胎冠陆地部16。胎冠陆地部16包含:中央主槽11与中间主槽13之间的第一胎冠陆地部17和胎肩主槽12与中间主槽13之间的第二胎冠陆地部18。
图2示出图1的胎面部2的5%内压状态的轮廓20的放大图。5%内压状态是指,将轮胎1在正规轮辋上进行轮辋组装,并且填充正规内压的5%的内压且无负载的状态。以下,在没有特别说明的情况下,轮胎各部的尺寸为在该5%内压状态下所测得的值。胎面部2的轮廓20是指,填埋设置在胎面部2的槽而使其与陆地部的踏面平滑连接的状态下的胎面部2的外面轮廓线。
如图2所示,胎面部2的轮廓20包含:胎冠轮廓21,其包含轮胎赤道C;以及一对胎肩轮廓22,其从胎冠轮廓21的两外侧向胎面端Te延伸。胎冠轮廓21和胎肩轮廓22是向轮胎半径方向外侧突出的圆弧状。
通常,当胎冠轮廓21的曲率半径小时,在轮胎行驶时,存在有接地压力集中在胎面部2的中央部的倾向。在本发明中,胎冠轮廓21的曲率半径Rc与胎肩轮廓22的曲率半径Rs之比Rc/Rs为7.0以上。
从轮胎赤道C至胎冠轮廓21与胎肩轮廓22的连接点23为止的轮胎轴向的距离L1为胎面半宽TWh的0.70倍以上。胎面半宽TWh是,在5%内压状态下,从轮胎赤道C至胎面端Te为止的轮胎轴向的距离。
胎冠轮廓21与胎肩轮廓22相比,具有足够大的曲率半径,并且能够充分确保从轮胎赤道C至连接点23为止的距离L1为胎面半宽TWh的0.70倍以上。因此,在轮胎行驶时,能使接地压力不集中在胎面部2的中央部,而分散在胎面部2整体。因此,能够提高胎面部2的耐磨损性。
另外,胎肩轮廓22与胎冠轮廓21相比,具有特别小的曲率半径,其形成范围也被设定成较小范围。因此,能够抑制胎肩陆地部15的橡胶体积的增加,从而能够防止轮胎重量的增加和胎肩陆地部15的放热。因此,能够防止滚动阻力的增加。
若所述比Rc/Rs不足7.0,则胎冠轮廓21的曲率半径Rc相对减小,因此会有胎冠陆地部16容易被磨损的问题。为了均衡地实现胎面部2的耐磨损性的提高和滚动阻力的降低,优选所述比Rc/Rs为7.5以上,更优选为8.0以上,并且优选为9.5以下,更优选为9.0以下。
本实施方式的胎肩轮廓22的曲率半径Rs为例如150~300mm。这样的胎肩轮廓22有助于防止胎肩陆地部15的放热,而能够防止滚动阻力的增加。
本实施方式的胎冠轮廓21的曲率半径Rc优选为1050mm,更优选为1200mm以上,并且优选为2850mm以下,更优选为2400mm以下。由此,能够得到充分平坦的胎冠轮廓21,从而能够有效地抑制胎冠陆地部16的磨损。
当所述距离L1小于胎面半宽TWh的0.70倍时,使胎肩轮廓22的形成范围增大,而会有胎肩陆地部15的放热量增加的问题。从这一观点出发,所述距离L1更优选为胎面半宽TWh的0.73倍以上。
当所述距离L1较大时,胎冠轮廓21的宽度过大,因此会有增大滚动阻力的问题,并且会有湿地性能下降的问题。因此,所述距离L1优选为胎面半宽TWh的0.80倍以下,更优选为0.77倍以下。
作为进一步优选的方式,本实施方式的连接点23位于胎肩主槽12内。当连接点位于胎肩陆地部15或胎冠陆地部16上时,应力在连接点23附近集中,会有产生不均匀磨损的问题。
优选胎肩轮廓22配置为,例如比在胎面端Te侧将胎冠轮廓21平滑延长的假想延长线25靠轮胎半径方向内侧。这种胎肩轮廓22能够减小作用于胎肩陆地部15的接地压力,而能够防止胎肩陆地部15的放热。
图3示出图2的胎肩主槽12的放大剖视图。如图3所示,胎肩主槽12具有:轮胎赤道C侧的内槽壁26;以及外槽壁27,其配置在胎面端Te侧且朝着轮胎半径方向外侧倾斜于胎面端Te侧。而且,外槽壁27相对于轮胎半径方向以大于内槽壁26的角度θ1倾斜。所述角度θ1例如为5~10°。由此,能够抑制胎肩陆地部15的轮胎轴向内侧端缘的不均匀磨损。
内槽壁26优选为,例如沿轮胎半径方向延伸。这种内槽壁26和上述外槽壁27可以用于在湿地行驶时向轮胎轴向外侧排出槽内的水。
如图1所示,在所述正规状态下,胎面部2的胎面宽度TW优选为轮胎最大宽度SW的0.80倍以上,更优选为0.85倍以上,并且优选为0.95倍以下,更优选为0.90倍以下。通过将上述胎冠轮廓21和胎肩轮廓22应用于具有这种比较大的胎面宽度TW的轮胎1,可以期待进一步显著的效果。
以上,详细地说明了本发明的一个实施方式的重载荷用轮胎,但本发明不限于上述具体的实施方式,能够变更为各种方式实施。
[实施例]
基于表1的规格,制造具有图1的基本构造的尺寸12R22.5的重载荷用轮胎。作为比较例1,制造胎冠轮廓的曲率半径Rc与胎肩轮廓的曲率半径Rs之比Rc/Rs不足7.0的重载荷用轮胎。作为比较例2,制造从轮胎赤道至所述连接点为止的距离L1小于胎面半宽TWh的0.70倍的重载荷用轮胎。针对各测试轮胎,测试胎冠陆地部的磨损量和滚动阻力。
各测试轮胎的共同规格如下所述。
轮胎尺寸:12R22.5
轮辋尺寸:8.25×22.5
轮胎内压:800kPa
测试车辆:10t载重卡车,在载物台前方装载标准负载量的50%的货物
轮胎安装位置:全部车轮
测试方法如下所述。
<胎冠陆地部的磨损量>
测试所述测试车辆在干燥路面行驶一定距离之后的胎冠陆地部的磨损量。结果是,令比较例1的胎冠陆地部的磨损量为100作为指数。数值越小,则表示胎冠陆地部的磨损量越小,胎面部的耐磨损性越优异。
<滚动阻力>
使用滚动阻力试验机测定各测试轮胎的滚动阻力。详细的条件如下所述。结果是,令比较例1的滚动阻力为100作为指数,数值越小,则表示滚动阻力越小。
纵向载荷:5kN
速度:80km/h
测试结果在表1中示出。
[表1]
Figure BDA0001286918130000081
Figure BDA0001286918130000091
Figure BDA0001286918130000101
根据测试的结果能够确认,实施例的充气轮胎能够防止滚动阻力的增加,并且减小胎冠陆地部的磨损量,而使胎面部的耐磨损性提高。
附图标记说明
2 胎面部
20 胎面部的轮廓
21 胎冠轮廓
22 胎肩轮廓
23 连接点
TWh 胎面半宽
L1 距离
Rc 胎冠轮廓的曲率半径
Rs 胎肩轮廓的曲率半径

Claims (6)

1.一种重载荷用轮胎,其具有胎面部,其特征在于,
轮胎截面包含轮胎旋转轴,所述轮胎旋转轴是对正规轮辋进行轮辋组装、填充有正规内压的5%的内压且无负载的5%内压状态的轮胎旋转轴,
在该轮胎截面中,所述胎面部的轮廓包含:胎冠轮廓,其包含轮胎赤道;以及一对胎肩轮廓,其从所述胎冠轮廓的两外侧向胎面端延伸,
所述胎冠轮廓和所述胎肩轮廓是向轮胎半径方向外侧突出的圆弧状,
所述胎冠轮廓的曲率半径Rc与所述胎肩轮廓的曲率半径Rs之比Rc/Rs为7.0以上9.5以下,
从所述轮胎赤道至所述胎冠轮廓与所述胎肩轮廓的连接点为止的轮胎轴向的距离,为胎面半宽的0.73倍以上0.8倍以下,
所述胎肩轮廓的曲率半径Rs为150~300mm,
所述胎冠轮廓的曲率半径Rc为1200~2400mm。
2.根据权利要求1所述的重载荷用轮胎,其特征在于,
在所述胎面部上,所述轮胎赤道的至少一侧设有胎肩主槽,其位于所述胎面端侧且在轮胎周向上连续延伸,
所述连接点位于所述胎肩主槽内。
3.根据权利要求2所述的重载荷用轮胎,其特征在于,
所述胎肩主槽具有:所述轮胎赤道侧的内槽壁;以及外槽壁,其配置在所述胎面端侧且朝着轮胎半径方向外侧倾斜于所述胎面端侧,
所述外槽壁相对于轮胎半径方向以大于所述内槽壁的角度倾斜。
4.根据权利要求1~3中任一项所述的重载荷用轮胎,其特征在于,所述胎肩轮廓配置为,与在所述胎面端侧将所述胎冠轮廓平滑延长的假想延长线相比,更靠轮胎半径方向内侧。
5.根据权利要求1~3中任一项所述的重载荷用轮胎,其特征在于,在包含轮胎旋转轴的轮胎截面上,其中,所述轮胎旋转轴是对正规轮辋进行轮辋组装且填充正规内压且无负载的正规状态的轮胎旋转轴,所述胎面部的胎面宽度为轮胎最大宽度的0.80~0.95倍。
6.根据权利要求4所述的重载荷用轮胎,其特征在于,
在包含轮胎旋转轴的轮胎截面上,其中,所述轮胎旋转轴是对正规轮辋进行轮辋组装且填充正规内压且无负载的正规状态的轮胎旋转轴,所述胎面部的胎面宽度为轮胎最大宽度的0.80~0.95倍。
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US20210291593A1 (en) * 2018-07-11 2021-09-23 Sumitomo Rubber Industries, Ltd. Heavy duty pneumatic tire and manufacturing method thereof
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07164823A (ja) * 1993-12-17 1995-06-27 Toyo Tire & Rubber Co Ltd 重荷重用空気入りタイヤ
EP0950547A2 (en) * 1998-04-17 1999-10-20 Sumitomo Rubber Industries Ltd. Pneumatic Tyre
DE102006029912A1 (de) * 2005-07-08 2007-02-01 Sumitomo Rubber Industries Ltd., Kobe Luftreifen und Heizform für den Reifen
CN101022964A (zh) * 2004-07-21 2007-08-22 株式会社普利司通 充气轮胎
JP2012035681A (ja) * 2010-08-04 2012-02-23 Bridgestone Corp 空気入りタイヤ
CN103974837A (zh) * 2011-11-29 2014-08-06 住友橡胶工业株式会社 重载轮胎
CN105564158A (zh) * 2014-10-31 2016-05-11 东洋橡胶工业株式会社 充气轮胎

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2742368B2 (ja) * 1993-03-22 1998-04-22 住友ゴム工業株式会社 空気入りタイヤ
JP3419830B2 (ja) * 1993-07-08 2003-06-23 株式会社ブリヂストン 空気入りラジアルタイヤ
JPH07242105A (ja) * 1994-03-04 1995-09-19 Bridgestone Corp 重荷重用空気入りタイヤ
JPH10250316A (ja) * 1997-03-11 1998-09-22 Bridgestone Corp 重荷重用空気入りタイヤ
JP2002511039A (ja) * 1997-06-20 2002-04-09 ミシュラン ルシェルシュ エ テクニク ソシエテ アノニム 周方向リブのトレッドパターンを有するタイヤ用のベルト
FR2857620B1 (fr) * 2003-07-18 2005-08-19 Michelin Soc Tech Pneumatique pour vehicules lourds
JP4973020B2 (ja) 2006-06-12 2012-07-11 横浜ゴム株式会社 空気入りタイヤ
JP4420098B2 (ja) * 2006-11-06 2010-02-24 横浜ゴム株式会社 空気入りタイヤ
JP5210334B2 (ja) * 2010-02-05 2013-06-12 住友ゴム工業株式会社 重荷重用タイヤ
JP6149618B2 (ja) * 2013-09-04 2017-06-21 横浜ゴム株式会社 空気入りタイヤ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07164823A (ja) * 1993-12-17 1995-06-27 Toyo Tire & Rubber Co Ltd 重荷重用空気入りタイヤ
EP0950547A2 (en) * 1998-04-17 1999-10-20 Sumitomo Rubber Industries Ltd. Pneumatic Tyre
CN101022964A (zh) * 2004-07-21 2007-08-22 株式会社普利司通 充气轮胎
DE102006029912A1 (de) * 2005-07-08 2007-02-01 Sumitomo Rubber Industries Ltd., Kobe Luftreifen und Heizform für den Reifen
JP2012035681A (ja) * 2010-08-04 2012-02-23 Bridgestone Corp 空気入りタイヤ
CN103974837A (zh) * 2011-11-29 2014-08-06 住友橡胶工业株式会社 重载轮胎
CN105564158A (zh) * 2014-10-31 2016-05-11 东洋橡胶工业株式会社 充气轮胎

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