Question

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HEAVY-LOAD RADIAL TIRE WITH SPECIFIED STEEL BELT STRUCTURE
BACKGROUND OF THE INVENTION
This invention relates to heavy-load radial tires usedfor large vehicles such as trucks, buses and dump trucks.
In conventional heavy-load radial tires used for largevehicles such as trucks, buses and dump trucks, three orfour belt layers of steel cords are laminated at an angle of 15 to 30 degress with respect to the tire circumfer-ence in the central part of the outside of a carcass-ply arranged perpendicular to the tire circumference. If aconventional radial tire is used for a long period of time, small cracks are formed at the cut end portions of the steel cords in the intermediate belt layer touching internally the outermost belt layer. The small cracks thus formed spread cooperating small cracks formed in the adjacent steel cords, so that the intermediate belt layer is separated from the tread crown part. This is caused by the fact that the end number of cords of the outer-
most belt layer is small and the cords are greatly spaced from one another, while the end number of cords of the intermediate cord layer is large similarly as in the end number of cords of the interior cord layer which is interior to the intermediate cord layer. This problem may be solved by decreasing the end number of cords of the intermediate belt layer and increasing the cord interval; however, the method suffers from the difficulties that the belt stre. gth of the intermediate belt layer is decreased and accordingly the tire strength becomes insuff cient.

Answer 1

带特定钢带结构的重载子午线胎
发明背景
这是关于卡车、客车及垃圾卡车等大型车辆用重载子午线轮胎的发明。
在卡车、客车及垃圾卡车等大型车辆用的传统重载子午线轮胎中,安装有三或四层钢丝带层 且与胎体帘布层外围的中心圆周有15到30度的夹角，而与胎体帘布层与轮胎圆周垂直。如果传统的线胎用的时间很长， 与最外层钢钢丝带层相接触的那个一个中间钢丝带层带层里德钢丝就会在切割头的末端产生裂纹。这种小裂纹一旦形成，它们就会与邻近钢丝里形成的裂纹一起迅速蔓延开，这样就会使这个中间钢丝带层与胎面冠分离开来。这是由以下原因导致的：最外层钢丝带层的钢丝末端数目小并且这些钢丝之间的间距较大，而与它挨着的那个中间钢丝带层的钢丝末端数目要大，同样它里面的钢丝带层的钢丝末端数目也要比他大。这个问题或许可以通过减少中间钢丝带层的钢丝末端数目和增加它们的间距来解决，但这样就减小了中间钢丝带层的强度，相应地轮胎的强度也就不够了。

Answer 2

重载子午胎指定的钢带结构
背景的发明
本发明涉及重载子午线轮胎usedfor大型车辆如卡车、客车及垃圾场卡车。
在传统的重载子午线轮胎用于largevehicles如卡车、客车及垃圾场卡车,三orfour钢绳带层合角是在15到30度的轮胎circumfer-ence中部的一个carcass-ply外圆周方向垂直排列的轮胎。如果aconventional子午线轮胎是用了很长一段时间,小裂纹形成的最后部分切钢绳中间带层内部最外层带层接触。这个小裂缝,从而形成小裂纹形成的合作中传播的绳子,以致相邻的钢材的中间带层分离的一部分。冠冕践踏这是造成这一事实的连线的结束。——外
大多数带层是非常小的,如从彼此的间距,而最后的连线绳索层中间的大同样作为最后的连线绳索层内的内部中间线层。解决这个问题可能是最后的绳索下降的中间带层,增加线区间;然而,这种方法中,带stre.困难的长中间带层和相应减少轮胎的强度成insuff提出。
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