CN109910512A - 充气轮胎 - Google Patents
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- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
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- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
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- B60C2011/0381—Blind or isolated grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
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- B60C2011/0383—Blind or isolated grooves at the centre of the tread
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- B60C11/03—Tread patterns
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- B60C2011/0386—Continuous ribs
- B60C2011/0388—Continuous ribs provided at the equatorial plane
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- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
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- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C2011/1245—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern being arranged in crossing relation, e.g. sipe mesh
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- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C2011/1254—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern with closed sipe, i.e. not extending to a groove
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- B60C11/03—Tread patterns
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- 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
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Abstract
本发明涉及一种充气轮胎。提供一种适合于在雪上行驶的充气轮胎。该充气轮胎具有借助沿轮胎周向延伸的主沟(10、15)以及沿轮胎宽度方向延伸的横沟(20、25)而形成的花纹块(36、41),在花纹块(36、41)的踏入侧的端部具有切口(50、60、70),该充气轮胎的特征在于,横沟(20、25)以如下方式倾斜地延伸:越靠近轮胎接地端(E)侧则越后接地,在切口(50、60、70)的轮胎接地端(E)侧与切口(50、60、70)相邻的部分,成为朝向轮胎赤道(C)侧形成锐角而突出的突起(51、61、71)。
Description
本申请以日本特许出愿2017-238851(申请日:2017年12月13日)为基础并主张日本特许出愿2017-238851的优先权。本申请包含日本特许出愿2017-238851的全部内容。
技术领域
本发明涉及一种充气轮胎。
背景技术
如专利文献1所记载,提出了如下方案:使得充气轮胎的胎面的花纹块的端部形成为锯齿状。在这种充气轮胎中,花纹块的锯齿状的端部能发挥边缘效应,因此充气轮胎的雪上性能良好。
然而,以往,并未在考虑胎面与雪之间的具体作用的基础上对花纹块的端部的锯齿形状进行细致的设计。
另外,如专利文献2所记载的那样,提出了如下方案:对于花纹块的端部(即、横沟的沟壁),形成为使得水向轮胎宽度方向外侧流动的锯齿形状,由此改善排水性。具体而言,专利文献2中提出了如下方案:在花纹块的端部形成多个较小的三角形的切口,并使得相邻的2个切口形成为朝向轮胎宽度方向外侧的锐角。
在专利文献2的该构造的情况下,排水性良好,但是,由于在雪上会将侵入至横沟的雪向轮胎宽度方向外侧排出,从而花纹块的端部不会陷入雪中,因此,雪上性能未必良好。
专利文献1:日本特开2005-14644号公报
专利文献2:日本特开2002-36820号公报
发明内容
本发明的课题在于,提供一种更适合于在雪上行驶的充气轮胎。
实施方式的充气轮胎具有借助沿轮胎周向延伸的主沟以及沿轮胎宽度方向延伸的横沟而形成的花纹块,在所述花纹块的踏入侧的端部具有切口,所述充气轮胎的特征在于,与所述切口相邻的所述横沟以如下方式倾斜地延伸:越靠近轮胎接地端侧则越后接地,在所述切口的轮胎接地端侧与所述切口相邻的部分成为朝向轮胎赤道侧形成锐角而突出的突起。
实施方式的充气轮胎具有上述特征,因此,更适合于在雪上行驶。
附图说明
图1是实施方式的充气轮胎的宽度方向截面图。
图2是实施方式的充气轮胎的胎面花纹的图。
图3是图2的胎面花纹中的中间花纹块以及胎肩花纹块的放大图。
图4是图3所示的部分附近的立体图。
图5是变更例的充气轮胎的胎面花纹的图。
附图标记说明
C…轮胎赤道、E…轮胎接地端、1…充气轮胎、2…胎圈部、2a…胎圈芯、2b…胎圈三角胶、3…胎面胶、4…胎侧胶、5…胎体帘布、6…内衬、7…带束、10…中央主沟、11…第一沟部、12…第二沟部、15…胎肩主沟、16…第一沟部、17…第二沟部、20…第一横沟、21…凹口、25…第二横沟、26…凹口、30…中央陆地部、35…中间陆地部、36…中间花纹块、37…踏入侧花纹块部、38…蹬出侧花纹块部、40…胎肩陆地部、41…胎肩花纹块、50…切口、51…突起、52…底面、53…架部、54…边界线、55…边界线、60…切口、61…突起、62…底面、64…边界线、65…边界线、70…切口、71…突起、72…底面、73…架部、74…边界线、75…边界线、125…第二横沟、136…中间花纹块、150…切口、151…突起。
具体实施方式
如图1举例所示,在充气轮胎1的轮胎宽度方向两侧设置有胎圈部2。胎圈部2包括:卷绕成圆形的由钢丝构成的胎圈芯2a;以及在胎圈芯2a的径向外侧设置的橡胶制的胎圈三角胶2b。在轮胎宽度方向两侧的胎圈部2架设有胎体帘布5。胎体帘布5是在与轮胎周向正交的方向上排列的多根帘线由橡胶覆盖而成的片状的部件。胎体帘布5在轮胎宽度方向两侧的胎圈部2之间形成充气轮胎1的骨架形状,并且在胎圈部2的周围从轮胎宽度方向内侧向外侧折返而将胎圈部2包裹。在胎体帘布5的内侧粘贴有由空气透过性较低的橡胶构成的片状的内衬6。
在胎体帘布5的轮胎径向外侧设置有1层或多层带束7。带束7是钢制的多根帘线由橡胶覆盖而成的部件。在带束7的轮胎径向外侧设置有胎面胶3,该胎面胶3具有与路面接触的接地面(以下称为“接地面”)。另外,在胎体帘布5的轮胎宽度方向两侧设置有胎侧胶4。除了上述部件以外,根据充气轮胎1的功能方面的需要,还设置有带束下垫、胎圈包布等部件。
在胎面胶3的表面形成有图2所示的胎面花纹。此外,在图2中,上下方向为轮胎周向,左右方向为轮胎宽度方向。在该胎面花纹中,作为沿轮胎周向延伸的宽幅的沟的主沟,设置有轮胎赤道C侧(即、轮胎宽度方向内侧)的2条中央主沟10、以及轮胎接地端E侧(即、轮胎宽度方向外侧)的2条胎肩主沟15共计4条主沟。而且,还设置有2条中央主沟10之间的中央陆地部30、中央主沟10与胎肩主沟15之间的中间陆地部35、以及胎肩主沟15与轮胎接地端E之间的胎肩陆地部40。
此处,陆地部是指由沟区划形成的部分。另外,轮胎接地端E是指:负载状态下的接地面的轮胎宽度方向端部。此外,负载状态是指:充气轮胎组装于标准轮辋并达到标准内压且承载有标准载荷的状态。此处,标准轮辋是指:JATMA、TRA、ETRTO等规格中规定的标准轮辋。另外,标准载荷是指:所述规格中规定的最大载荷。另外,标准内压是指:与所述最大载荷对应的内压。
中央主沟10包括:相对于轮胎周向倾斜地延伸的较长的第一沟部11;以及相对于轮胎周向倾斜、且向与第一沟部11不同的方向延伸的较短的第二沟部12。而且,第一沟部11和第二沟部12交替地排列,由此使得中央主沟10形成为锯齿状。在图2中,当轮胎滚动时(即、车辆行驶时),先从下侧开始接地。根据该图可知,第一沟部11以如下方式倾斜:越是后接地的部位(换言之,越靠近旋转方向后方)则越趋向轮胎接地端E侧。
另外,胎肩主沟15包括:相对于轮胎周向倾斜地延伸的较长的第一沟部16;以及相对于轮胎周向倾斜、且向与第一沟部16不同的方向延伸的较短的第二沟部17。而且,第一沟部16和第二沟部17交替地排列,由此使得胎肩主沟15形成为锯齿状。根据图2可知,第一沟部16以如下方式倾斜:越是后接地的部位则越趋向轮胎接地端E侧。
另外,作为沿轮胎宽度方向延伸的横沟而设置有第一横沟20以及第二横沟25。第一横沟20和第二横沟25在轮胎周向上交替地配置。第一横沟20和第二横沟25以如下方式倾斜地延伸:越靠近轮胎接地端E侧则越后接地。
第一横沟20横穿胎肩陆地部40以及中间陆地部35,且进一步延伸至中央陆地部30并在中央陆地部30内封闭。因此,在中央陆地部30形成有作为第一横沟20的一部分的凹口21。
另外,第二横沟25横穿胎肩陆地部40,且进一步延伸至中间陆地部35并在中间陆地部35内封闭。因此,在中间陆地部35形成有作为第二横沟25的一部分的凹口26。
此外,上述胎肩主沟15的第二沟部17与第一横沟20以及第二横沟25重叠。
由于形成为如上那样的沟的构造,因此,2条中央主沟10之间的中央陆地部30形成为沿轮胎周向延伸而未由横沟切断的肋部。另外,中间陆地部35由第一横沟20切断,从而形成为在轮胎周向上排列的多个中间花纹块36的花纹块列。在中间花纹块36中,将比凹口26先接地的部分设为踏入侧花纹块部37,将比凹口26后接地的部分设为蹬出侧花纹块部38。实质上可以将踏入侧花纹块部37以及蹬出侧花纹块部38分别视为花纹块。另外,胎肩陆地部40由第一横沟20以及第二横沟25切断,从而形成为在轮胎周向上排列的多个胎肩花纹块41的花纹块列。
如图2及图4所示,在中间花纹块36的踏入侧的端部(即、轮胎周向两端部中的先接地的端部)形成有切口50。在切口50的轮胎接地端E侧与切口50相邻的部分,成为朝向轮胎赤道C侧形成锐角而突出的突起51。此外,从与轮胎接地面垂直的方向观察胎面花纹而判断是锐角还是钝角。此处,如图4所示,切口50和突起51的边界线55以如下方式倾斜:越是后接地的部位则越趋向轮胎接地端E侧。
如图4所示,切口50的底面52是比第一横沟20的底部高的架部53的上表面。因此,切口50比第一横沟20浅。切口50的深度(即、从接地面至底面52的深度)优选为第一横沟20的深度的50%以下。此外,如图2所示,突起51的前端突出到第一横沟20内。
另外,如图2~图4所示,在中间花纹块36的蹬出侧花纹块部38的踏入侧的端部形成有切口60。切口60在俯视(即、从轮胎外径侧观察)时为三角形,该三角形若以与凹口26的边界线64(参照图3)为底边,则轮胎接地端E侧(图3的右侧)的底角为钝角,轮胎赤道C侧(图3的左侧)的底角为锐角。
由于切口60形成为这种形状,因此,在切口60的轮胎接地端E侧与切口60相邻的部分成为朝向轮胎赤道C侧形成锐角而突出的突起61。此处,切口60和突起61的边界线65以如下方式倾斜:越是后接地的部位则越趋向轮胎接地端E侧。
如图4所示,切口60的底面62是比凹口26的底部高的架部的上表面。因此,切口60比凹口26浅。切口60的深度(即、从接地面至底面62的深度)优选为凹口26的深度的50%以下。此外,如图3所示,突起61的前端突出到凹口26内。
另外,如图2~图4所示,在胎肩花纹块41的踏入侧的端部形成有切口70。在图2~图4的情况下,在1个胎肩花纹块41形成有2个切口70。切口70在俯视(即、从轮胎外径侧观察)时为三角形,该三角形若以与第一横沟20或者第二横沟25的边界线74(参照图3)为底边,则轮胎接地端E侧(图3的右侧)的底角为钝角,轮胎赤道C侧(图3的左侧)的底角为锐角。
由于切口70形成为这种形状,因此,在切口70的轮胎接地端E侧与切口70相邻的部分成为朝向轮胎赤道C侧形成锐角而突出的突起71。此处,切口70和突起71的边界线75以如下方式倾斜:越是后接地的部位则越趋向轮胎接地端E侧。
如图4所示,切口70的底面72是比与切口70相邻的横沟(第一横沟20或者第二横沟25)的底部高的架部73的上表面。因此,切口70比相邻的横沟浅。切口70的深度(即、从接地面至底面72的深度)优选为相邻的横沟的深度的50%以下。此外,如图3所示,突起71的前端突出到相邻的横沟内。
如上所述,在中间花纹块36的踏入侧花纹块部37、蹬出侧花纹块部38以及胎肩花纹块41的各自的踏入侧的端部形成有切口50、60、70,在切口50、60、70的轮胎接地端E侧与切口50、60、70相邻的部分成为朝向轮胎赤道C侧形成锐角而突出的突起51、61、71。因此,当充气轮胎1在雪上滚动时,在各花纹块的踏入侧,突起51、61、71陷入雪中,从而牵引性变得良好。因此,该充气轮胎1适合于在雪上行驶。
此处,与切口50、60、70相邻的第一横沟20以及第二横沟25以如下方式倾斜地延伸:越靠近轮胎接地端E侧则越后接地,因此,朝向轮胎赤道C侧突出的突起51、61、71的前端变得更尖锐。因此,突起51、61、71更深地陷入雪中,从而牵引性变得良好。
另外,突起51、61、71的前端突出到相邻的横沟内,因此,突起51、61、71更深地陷入雪中,从而牵引性变得良好。
另外,切口50、60、70的底面比相邻的横沟的底部高,因此,突起51、61、71的刚性得到确保。只要切口50、60、70的深度为相邻的横沟的深度的50%以下,则能够充分确保突起51、61、71的刚性。
以上实施方式为示例,本发明的范围并不限定于此。对于以上实施方式,在未脱离发明主旨的范围内,可以进行各种变更。
图5中示出了变更例的胎面花纹。在图5的胎面花纹中,可以设置横穿胎肩陆地部40以及中间陆地部35并在中央主沟10开口而停止延伸的第二横沟125以取代图2的胎面花纹中的在中间陆地部35内封闭的第二横沟25。因此,设置由第一横沟20以及第二横沟125切断的中间花纹块136以取代图2的胎面花纹中的由第一横沟20切断且形成有凹口26的中间花纹块36。而且,在中间花纹块136的踏入侧的端部中的、与第一横沟20相邻的部分形成有与图2相同的切口50、突起51,在与第二横沟125相邻的部分形成有与切口70、突起71相同的切口150、突起151。
此外,即使以上那样的切口、突起仅形成于中间花纹块36(或者136)或者仅形成于胎肩花纹块41,也能够发挥效果。
Claims (4)
1.一种充气轮胎,其具有借助沿轮胎周向延伸的主沟以及沿轮胎宽度方向延伸的横沟而形成的花纹块,在所述花纹块的踏入侧的端部具有切口,
所述充气轮胎的特征在于,
与所述切口相邻的所述横沟以如下方式倾斜地延伸:越靠近轮胎接地端侧则越后接地,
在所述切口的轮胎接地端侧与所述切口相邻的部分,成为朝向轮胎赤道侧形成锐角而突出的突起。
2.根据权利要求1所述的充气轮胎,其特征在于,
所述切口和所述突起的边界线以如下方式倾斜:越是后接地的部位则越趋向轮胎接地端侧。
3.根据权利要求1或2所述的充气轮胎,其特征在于,
所述切口的底面是比所述横沟的底部高的架部的上表面。
4.根据权利要求1~3中任一项所述的充气轮胎,其特征在于,
所述突起的前端突出到所述横沟内。
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