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    • 6. 发明公开
    • PNEUMATIC TIRE
    • LUFTREIFEN
    • EP3061630A4
    • 2017-06-21
    • EP14862020
    • 2014-10-24
    • SUMITOMO RUBBER IND
    • AOKI CHIEKOFUKUMOTO TORUMATSUMOTO TADAO
    • B60C15/04B60C9/00D07B1/06
    • B60C15/04B60C9/00B60C9/02B60C15/02B60C15/0603B60C17/0009B60C2015/042B60C2015/046D07B1/06D07B1/0613D07B1/0646D07B2201/1016D07B2201/1092D07B2201/2006D07B2401/2005D07B2501/2053
    • [Object] To provide a pneumatic tire 22 that allows a low fitting pressure to be achieved without impairing a tightening force. [Solution] The tire 22 includes a pair of beads 30 and a carcass 32 extending on and between both beads 30. Each bead 30 includes a core 48. The core 48 includes: a main body 56 including a cord 60 extending in a circumferential direction; and a stretchable portion 58 formed from a crosslinked rubber. The stretchable portion 58 is located inward of the main body 56 in an axial direction. The stretchable portion 58 has a size with which at least one cross-section of the cord 60 can be included therein in a cross-section of the bead 30. Preferably, in the tire 22, the main body 56 includes a hard unit and a soft unit. The soft unit is located outward of the hard unit in a radial direction. A hard cord of the hard unit stretches more easily than a soft cord of the soft unit.
    • 本发明的目的是提供一种充气轮胎22,其能够在不损害紧固力的情况下实现低配合压力。 [解决方案]轮胎22包括一对胎圈30和在两个胎圈30之间和两个胎圈30之间延伸的胎体32.每个胎圈30包括型芯48.型芯48包括:主体56,其包括沿圆周方向 ; 和由交联橡胶形成的可拉伸部分58。 可伸缩部分58沿轴向方向位于主体56的内侧。 可拉伸部分58的尺寸使得绳60的至少一个横截面可以在横截面中包括在胎圈30的横截面中。优选地,在轮胎22中,主体56包括硬质单元和 软单元。 软单元沿径向位于硬单元的外侧。 硬单元的硬线比软单元的软线更容易伸展。