摘要:
An object of the present invention is to provide a pneumatic tire which can be easily manufactured and can reliably reduce cavity resonance sound. Specifically, the present invention provides a pneumatic tire at least having: a tread portion 3 including a belt 5 constituted of at least one belt layer; a bead portion 1; and an inner peripheral surface having short fibers 10 fixed to at least a portion thereof, wherein the innermost belt layer in the tire radial direction of the belt has a tire widthwise width BW, characterized in that: provided that the tire central region C is a region extending to be symmetrical with respect to the tire equatorial plane and having a width of BM/2 and a tire side region S is a region extending from each outer end in the tire widthwise direction of the tire central region C to a corresponding inner end in the tire radial direction of the bead portion 1, the tire central region C and each tire side region S satisfy a relationship represented by following formula (1) in the inner peripheral surface of the tire. Short fiber-fixed area in the tire central region/Area of the tire central region
摘要:
A tire 100 comprises one pair of bead cores 110 and a carcass layer 120 having a toroidal shape that extends between the one pair of bead cores 110. The carcass layer 120 is folded back to an outside in a tire width direction at the bead cores 110. With respect to an end portion 121 of the carcass layer 120 folded back at the bead cores 110, a plurality of wall members 200 are provided at positions in the tire width direction. The plurality of wall members 200 are provided so as to be spaced from one another along a tire circumferential direction.
摘要:
A pneumatic tire including a radial carcass (5) of at least one carcass ply including a main body portion (3a) and a turnup portion (3b), and a reinforcing member (7) including at least two reinforcing layers. The at least two reinforcing layers (6a, 6b) are cross reinforcing layers (21) arranged so as to envelop at least the turnup portion of the radial carcass and cross cords of these layers with each other. Outer ends of the cross reinforcing layers, located outward from the turnup portion (3b) of the radial carcass in the widthwise direction of the tire, are outward from an outer end (13) of the turnup portion of the radial carcass in the radial direction of the tire. A crossing angle α between cords of adjacent cross reinforcing layers with respect to a circumferential direction (15) of the tire is more than 50° but less than 130°.
摘要:
A pneumatic tire comprising a radial carcass (5) of at least one carcass ply including a main body portion (3a) and a turnup portion (3b), and a reinforcing member (7) including at least two reinforcing layers. The at least two reinforcing layers (6a, 6b) are cross reinforcing layers (21) arranged so as to envelop at least the turnup portion of the radial carcass and cross cords of these layers with each other. Outer ends of the cross reinforcing layers, located outward from the turnup portion (3b) of the radial carcass in the widthwise direction of the tire, are outward from an outer end (13) of the turnup portion of the radial carcass in the radial direction of the tire. A crossing angle a between cords of adjacent cross reinforcing layers with respect to a circumferential direction (15) of the tire is more than 50° but less than 130°.
摘要:
The present invention aims to provide a method of designing a resonator more simply by deriving a non-transcendental model formula, and to provide a pneumatic tire having the resonator designed by this method. A method of designing a resonator 1 of a pneumatic tire having a circumferential groove 5 on a tread 4 and the resonator 10 configured to reduce a noise generated by resonance in tubular spaces defined by the circumferential groove 5 and a road surface, the resonator 1 having a branch groove 2 branched from the circumferential groove 5 and an air chamber 3 communicating with the branch groove 2 and having a cross section perpendicular to its extending direction greater than that of the branch groove 2, wherein a portion l1 of a minimum cross section Smin of the branch groove from an opening to the circumferential groove satisfies l1/L
摘要翻译:本发明旨在提供一种通过导出非先验模型公式更简单地设计谐振器的方法,并且提供具有通过该方法设计的谐振器的充气轮胎。 一种设计在胎面4上具有周向沟槽5的充气轮胎的谐振器1的方法以及构造成在由周向槽5和路面限定的管状空间中减少由共振产生的噪声的谐振器10,谐振器1具有 从周向槽5分支的分支槽2和与分支槽2连通且与其延伸方向垂直的横截面大于分支槽2的横截面的空气室3,其中最小横截面积Smin的部分l1 从开口到周向沟槽的分支沟槽满足l1 / L <1 /&pgr; 和l2 / L <(l-l1)/ L <1 /&pgr;其中l是分支槽2的轴线oo'的长度,L是接触片内周向槽的长度,Smin是 分支槽的横截面的最小部分,Smax是空气室的横截面的最大部分,并且确定谐振器形状的1 / L与Smin / Smax之间的关系满足以下等式:S 最大值=&pgr; 2 2(0.75)2(l L)2和S m博士n S max =&pgr; 2(2)(1.25){(l L)2 - 2&pgr; 另外,提供了具有通过该方法设计的谐振器的充气轮胎。
摘要:
There is proposed a tire realizing the simplification of a bead portion structure without sacrificing a bead portion durability and a steering stability.A tire comprises a carcass toroidally extending between a pair of bead cores embedded in respective bead portions, in which the carcass is combined with the bead core through such a pathway that the carcass passes inside a thickness center of the bead portion in an axial direction of the tire and reaches to a face of the bead core inside the tire and then passes through the bead core from an inside of the tire toward an outside thereof and terminates in contact with a face of the bead core at a side of a bead base.
摘要:
A pneumatic tire comprising a radial carcass (5) of at least one carcass ply including a main body portion (3a) and a turnup portion (3b), and a reinforcing member (7) including at least two reinforcing layers. The at least two reinforcing layers (6a, 6b) are cross reinforcing layers (21) arranged so as to envelop at least the turnup portion of the radial carcass and cross cords of these layers with each other. Outer ends of the cross reinforcing layers, located outward from the turnup portion (3b) of the radial carcass in the widthwise direction of the tire, are outward from an outer end (13) of the turnup portion of the radial carcass in the radial direction of the tire. A crossing angle α between cords of adjacent cross reinforcing layers with respect to a circumferential direction (15) of the tire is more than 50° but less than 1300°.