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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire edge, transportation and packaging, etc., which can solve the problems of rubber damage, cord breakage, rubber shear strain increase, etc., and achieve the effect of reducing twists and preventing breakage

Inactive Publication Date: 2009-03-11
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, in the tire to which the technique disclosed in Patent Document 3 is applied, the shear strain of the rubber between the main body portion and the turnback portion increases.
As a result, the rubber between the main body and the folded part may be damaged
At the same time, the reduction of input compression to the folded portion is insufficient, and cord breakage tends to occur at the folded portion

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

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Embodiment Construction

[0044] An example of the pneumatic tire of the present invention will be described with reference to the drawings. In addition, in the description of the following drawings, the same or similar reference numerals are attached to the same or similar parts. However, the drawings are schematic representations, and ratios of dimensions and the like are different from actual conditions. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, the drawings also include parts in which mutual dimensional relationships and ratios are different.

[0045] FIG. 1 is a sectional view in the tread width direction of a pneumatic tire according to the present embodiment, figure 2 It is an enlarged cross-sectional view showing a bead constituting the pneumatic tire of the present embodiment. As shown in FIG. 1 , a pneumatic tire 1 includes a pair of beads 3 , a carcass 5 , a pair of sidewall portions 7 , a belt 9 and a trea...

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Abstract

A pneumatic tire comprises a carcass layer formed of a body part and a folded part. The pneumatic tire meets the following requirements: (a) The aspect ratio is 80% or less; (b) The cords forming the folded part are arranged at an angle of 0 to 10 DEG relative to the radial direction; (c) 2*FH<=CE<=6*FH; (d) 3*a<=t<=5*a in the area of 2*FH to 4*FH in the radial direction of the tire from the inner flange end of the rim; (e) 0.915<=L2 / L1<=1.000 at the position of 3*FH in the radial direction of the tire from the inner flange end of the rim.

Description

technical field [0001] The present invention relates to a pneumatic tire. Background technique [0002] Conventionally, there is a technique for suppressing carcass delamination (peeling) in order to improve the durability of the bead. For example, there is disclosed a technique of angling the turned-back portion of the carcass (for example, refer to Patent Document 1 or Patent Document 2). Alternatively, there is disclosed a technique in which the middle portion of the turned-back portion of the carcass is brought closest to the main body portion (for example, refer to Patent Document 3). [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 11-170807 [0004] Patent Document 2: Japanese Unexamined Patent Publication No. 2002-347409 [0005] Patent Document 3: Japanese Patent Application Laid-Open No. 1-111504 [0006] However, in heavy duty tires (for example, tires for construction vehicles) etc., there are cases where large lodging deformation occurs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/00B60C15/06
CPCB60C15/06B60C2015/009
Inventor 中村信介
Owner BRIDGESTONE CORP