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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire edges, vehicle components, etc., can solve the problems of driving stability and ride comfort that cannot be optimized, and achieve the optimization of driving stability, ride comfort, and suppression of growth. big effect

Pending Publication Date: 2022-07-12
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is currently the case that for pneumatic tires with a high tire section height such as tires mounted on sport utility vehicles (SUVs) or minivans, driving stability and ride comfort

Method used

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  • Pneumatic tire
  • Pneumatic tire
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Examples

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Effect test

Embodiment

[0047] Pneumatic tires of Comparative Examples 1 to 4 and Examples 1 to 9 having a tire size of P235 / 65R17 103T and having an annular tread portion extending in the tire circumferential direction and provided on the tread portion were produced. A pair of sidewall portions on both sides and a pair of bead portions provided on the inner side in the tire radial direction of the sidewall portion, an annular bead core extending in the tire circumferential direction is embedded in each of the bead portions. The outer circumference of the bead core is provided with a first bead filler, and the carcass layer is wound around the bead core and the first bead filler from the inner side of the tire to the outer side in each bead portion, and is wound around the winding portion of the carcass layer. A second bead filler is provided on the outer side in the tire width direction, wherein the height H1 of the upper end of the first bead filler, the hardness of the first bead filler, and the ra...

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Abstract

Provided is a pneumatic tire capable of achieving both driving stability and riding comfort at a high level. In this pneumatic tire, a bead core (5) is embedded in a bead section (3), a first bead filler (6) is provided on the outer periphery of the bead core (5), a carcass layer (4) is wound around the bead core (5) and the first bead filler (6) from the inside to the outside of the tire, and a second bead filler (16) is provided on the outside of the wound section of the carcass layer (4) in the width direction of the tire, the height H1 of the upper end of the first bead filler (6) is within the range of 10%-30% of the tire cross-section height SH, the winding end of the carcass layer (4) is provided further to the outside in the tire radial direction than the tire maximum width position (Pmax), and the upper end of the second bead filler (16) is provided between the upper end of the first bead filler (6) and the winding end of the carcass layer (4). The second bead filler (16) has a shape that tapers toward the outside in the tire radial direction, and the thicknesses (G1-G3) at predetermined positions of the second bead filler satisfy the relationships 0.5 < = G2 / G1 < = 0.8 and 0.4 < = G3 / G1 < = 0.6.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as a tire to be mounted on a sport utility vehicle (SUV) or a minivan, and more specifically, to a pneumatic tire capable of achieving both high driving stability and ride comfort at a high level . Background technique [0002] In the pneumatic tire, a bead filler made of a high-hardness rubber composition is provided on the outer periphery of the bead filler. By providing the bead filler as described above, the driving stability of the pneumatic tire is improved. However, when the size of the bead filler is increased, although the effect of improving driving stability can be obtained, there is a problem that other tire performances such as ride comfort are deteriorated. Therefore, an attempt has been made to achieve both driving stability and other tire performance by adding auxiliary bead fillers other than the bead filler to the bead portion (for example, refer to Patent Documents 1 to 3)....

Claims

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Application Information

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IPC IPC(8): B60C15/06
CPCB60C15/06B60C15/0036B60C15/0607B60C2015/061B60C2015/0614B60C2015/009Y02T10/86B60C15/0603B60C2015/0621
Inventor 竹森谅平
Owner YOKOHAMA RUBBER CO LTD
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