Truck tyre with groove bottom crack resistance

A technology for tires and carcasses, used in tire parts, reinforcement layers of pneumatic tires, transportation and packaging to achieve the effects of extending service life, improving tear resistance and reducing stress and strain

Pending Publication Date: 2019-12-20
ZHONGCE RUBBER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems of groove bottom cracks, the purpose of this application is to provide a heavy-duty tire with groove bottom cra

Method used

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  • Truck tyre with groove bottom crack resistance
  • Truck tyre with groove bottom crack resistance
  • Truck tyre with groove bottom crack resistance

Examples

Experimental program
Comparison scheme
Effect test

Example

[0031] Comparative case 1

[0032] The distance b between the end point of the 1# belt and the inner end point of the shoulder pad rubber 6 is set to 20mm, and the corresponding value of c is also adjusted to 20mm. The carcass film 71# is set to be 30mm wide and 1mm thick. The film set on the carcass 4 is set to be 105mm wide and 1.0mm thick, and the rest are the same as in the application example.

Example

[0033] Comparative case 2

[0034] Add a 45*2.0 film under the shoulder pad rubber 6 and the carcass film 7, and control the ratio of the shoulder thickness f to the middle thickness e of the crown to 1.3, and the difference between the attached film and the inner end point of the shoulder pad rubber 6 The grade is 5 to 10 mm, and the rest are the same as in this application example.

[0035] figure 2 is the crack growth diagram at the bottom of the groove. The occurrence form of tire groove bottom cracks is mainly affected by the stress and strain in these three directions. Among them, the groove cracks caused by the lateral expansion force (usually occur in side grooves) can be measured by measuring the change value of the groove width after the tire is inflated. Pre-assessment. The cracks caused by circumferential shear force and radial stress generally need to be judged by observing the groove crack shape after actual use. Therefore, by reducing the variation of the g...

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Abstract

The invention relates to a truck tyre, in particular to a truck tyre with groove bottom crack resistance. According to the truck tyre with groove bottom crack resistance, a tyre crown part of the tyrecomprises a tread, a first belted layer, a second belted layer, a third belted layer, two zero-degree belted layers, a tyre body and a rubber tyre shoulder pad; at least three pattern grooves are formed on the surface of the tread; the tyre shoulder pad is arranged between the belted layers and the tyre body; the tyre crown part also comprises a tyre body rubber sheet; the tyre body rubber sheetis arranged between the tyre body and the rubber tyre shoulder pad; the distance b between the endpoint of the first belted layer and the inner endpoint of the rubber tyre shoulder pad is 5 to 10 mm;the distance c between the inner endpoint of the rubber tyre shoulder pad and the endpoint of the tyre body rubber sheet is 5 to 10 mm; the edge covering rubber of the first belted layer is 24 to 28 mm in width and 0.5 to 0.8 mm in thickness; and the tyre body rubber sheet is 100 to 110 mm in width and 0.5 to 0.8 mm in thickness. From the angle of the tyre structure design, the tear resistance ofthe tyre groove bottom is improved and the service life of the tyre is prolonged.

Description

technical field [0001] The present application relates to a truck tire, in particular to a tire for truck bottom cracking resistant. Background technique [0002] Groove bottom cracking is one of the most complained damage problems in the truck tire market, especially the phenomenon of groove cracking that occurs at the beginning of use has a high complaint rate. There are many reasons for tire groove bottom cracks in heavy-duty tires, mainly flexural deformation, stress cracks, and crack growth caused by trauma. With the development of automobile technology and the complexity of service conditions, the reasons for tire groove bottom cracks also Begin to show the characteristics of diversity. [0003] For example, in recent years, buses have roughly experienced three different development stages: diesel vehicles, hybrid vehicles, and pure electric vehicles. Especially after hybrid buses are switched to pure electric vehicles, the torque of the vehicle increases, and the dri...

Claims

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Application Information

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IPC IPC(8): B60C9/02
CPCB60C9/02
Inventor 张春生俞惠友王学瑞侯丹丹
Owner ZHONGCE RUBBER GRP CO LTD
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