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    • 5. 发明公开
    • PNEUMATIC TIRE
    • 充气轮胎
    • EP2159082A1
    • 2010-03-03
    • EP08753033.3
    • 2008-05-21
    • Bridgestone Corporation
    • YAMAZAKI, Shinichiro
    • B60C15/04B60C15/06
    • B60C15/04B60C2015/044D07B1/062D07B1/08D07B2201/2002D07B2201/2033D07B2501/2053
    • An object of the present invention is to improve durability of a bead portion of a tire by optimizing a sectional shape and arrangement of a bead wire(s). The pneumatic tire comprises: a pair of bead portions having bead cores embedded therein, each bead core being constituted of plural bead wires extending in the tire circumferential direction; a pair of side wall portions extending from the bead portions on the outer side in the tire radial direction; a tread portion extending over the respective sidewall portions; and a carcass extending in a toroidal shape across the aforementioned portions and having respective end portions being turned up around the bead cores, wherein the bead wires each have complementary shape portions in a section in the tire widthwise direction, by which shape portions adjacent bead wires are complementarily engageable with each other.
    • 本发明的目的是通过优化胎圈钢丝的截面形状和排列来改善轮胎的胎圈部分的耐久性。 所述充气轮胎包括:一对胎圈部,所述一对胎圈部中嵌入有胎圈芯,每个胎圈芯由沿轮胎周向延伸的多条胎圈钢丝构成; 从轮胎径向外侧的胎圈部延伸的一对侧壁部, 在相应侧壁部分上延伸的胎面部分; 以及横跨前述部分以环形延伸并且具有围绕胎圈芯的各个端部部分的胎体,其中胎圈钢丝在轮胎宽度方向上的区段中各自具有互补形状部分,通过该部分邻近胎圈钢丝 彼此互补。