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Pneumatic tire

一种充气轮胎、轮胎的技术，应用在充气轮胎的增强层、轮胎零部件、车轮等方向，能够解决轮胎总重量大等问题，达到防止脱层损坏、增强弯曲刚度的效果

Active Publication Date: 2008-12-03
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, there is a problem in this tire that the total weight of the tire is too large since the circumferential reinforcing layer is provided at the inner peripheral side of the belt and the belt reinforcing layer is also provided at the outer peripheral side of the belt.

Method used

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Embodiment Construction

[0029] Embodiments of the present invention will be discussed with reference to the following drawings.

[0030] figure 1 is a transverse sectional view of a tread portion in a half tire according to an embodiment of the present invention. In the drawings, reference numeral 1 is a carcass, and reference numeral 2 is a tread rubber arranged at the outer peripheral side of a crown portion of the carcass.

[0031] A belt 5 comprising two belt layers 3, 4 is arranged between a carcass 1 and a tread rubber 2 extending annularly between bead cores not shown, while two circumferentially reinforcing layers 6 , 7 are arranged in the vicinity of the inner peripheral side of the belt layer 5 . Preferably, a buffer rubber layer 8 with a thickness of 0.5-2.5 mm is interposed between the side end of the circumferential reinforcement layer 7 and the belt layer 4 .

[0032] The width L of the belt layer 4 located on the inner peripheral side is 80-90% of the tire section width W, the width...

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Abstract

The present invention provides a pneumatic tire comprising a tread rubber (2) disposed in the outer periphery of the crown of a carcass (1) in the form of one or more toroidally disposed carcass plies, a belt (5) disposed between the tread rubber (2) and the carcass (1) and composed of two belt layers (3, 4) with belt layer cords (10) crossing each other between the layers, each belt layer cord (10) extending as it is inclined at an angle of 45-80 degrees with respect to the tire peripheral direction, and one or more peripherally strengthening layers (6, 7) which are disposed in the inner periphery of the belt (5) and which are in the form of wavy or zigzag meandering cords (9) extending substantially peripherally of the tire, wherein the width (L) of the belt layer (7) on the inner peripheral side is made greater than the width (M) of the peripherally strengthening layer, while the width (N) of the belt layer on the outer peripheral side is made less than the width (M) of the peripherally strengthening layer.

Description

technical field [0001] The present invention relates to a pneumatic tire which has improved durability and uneven wear resistance and is mainly suitable for load-carrying vehicles such as trucks, buses and the like. Background technique [0002] In a pneumatic truck tire, a belt layer is generally provided at the outer peripheral side of the crown portion of the carcass to reinforce the tread portion. It mainly adopts a cross-linked belt layer consisting of multiple belt layers (the cords of these belt layers cross each other), or a bias belt layer composed of one belt layer (the belt layer contains The tire's circumferential direction is inclined in one direction) as the belt layer. [0003] When air pressure is charged in such a pneumatic tire, in the shoulder portion located at the cut end of the belt cord of the tread, the hooping effect of the belt becomes smaller than that of the central portion of the tread, so that the belt The amount of increase in size of the bun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/18B60C9/20B60C9/28
CPCB60C9/28B60C9/20Y10T152/10783
Inventor 山中孝也
Owner BRIDGESTONE CORP
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