Provided is a heavy-duty pneumatic tire 2 in which not only occurrence of a damage of CBU but also occurrence of pulling-out of a carcass ply 36 can be inhibited, and which has excellent durability. In the tire 2, beads 8 each include a cover 28 enclosing at least a part of a core 24. The cover 28 is located, between the core 24 and the carcass ply 36, in a portion at which the carcass ply 36 encloses the core 24. The cover 28 is composed of one cover ply 64 including a large number of aligned cover cords 66 and a cover topping rubber 68 covering the cover cords 66. A ratio of a distance between the cover cords 66 to an outer diameter of a carcass cord 56 is not lower than 0.35 and not higher than 0.85. A difference between a hardness of the cover topping rubber 68 and a hardness of a carcass topping rubber 58 is not less than -5 and not greater than 5.

    本发明提供一种重载用充气轮胎(2),其不仅能够抑制CBU损伤的发生,还能够抑制胎体帘布层(36)的拉拔的发生,耐久性优异。在该轮胎(2)中,胎圈(8)具有包围芯部(24)的至少局部的包覆层(28)。在胎体帘布层(36)包围芯部(24)的部分,包覆层(28)位于芯部(24)与胎体帘布层(36)之间。包覆层(28)由包含并列的多个包覆帘线(66)和覆盖这些包覆帘线(66)的包覆贴胶(68)的1片包覆帘布层(64)构成。包覆帘线(66)间的距离相对于胎体帘线(56)的外径之比为0.35以上且0.85以下。包覆贴胶(68)的硬度与胎体贴胶(58)的硬度之差为‑5以上且5以下。


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    Title :

    HEAVY-DUTY PNEUMATIC TIRE


    Additional title:

    重载用充气轮胎


    Contributors:
    LI QINGMAO (author)

    Publication date :

    2021-03-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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