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Pneumatic Tire

A technology of pneumatic tires and tires, which is applied in the direction of pneumatic tires, tire parts, tire edges, etc.

Active Publication Date: 2017-12-08
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each bead has a core

Method used

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  • Pneumatic Tire
  • Pneumatic Tire
  • Pneumatic Tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] got equipped figure 1 The structure shown is the tire of Example 1 equipped with the specifications shown in Table 1 below. The size of this tire is 215 / 45R17. The structure of the tire core is as figure 2 like that. This is denoted by " figure 2 ” is shown. The axial width W of the arc C is 6.4 mm. The angle θ formed by the base of the core and the axial direction is 17°. For this tire, the distance D is 4.2 mm. The distance between the core and the base of the tire is 5% longer.

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Abstract

In a tire (2), on a cross-section, three or more rows in each of which cross-sections (30) of a wire are aligned almost in the axial direction, are layered in the radial direction. The cross-sections (30) of the wire in a first row disposed on an innermost side in the radial direction and the cross-sections (30) of the wire in a second row layered outward of the first row are staggered. On a cross-section obtained by the tire (2) being cut at a plane perpendicular to the circumferential direction, an outline of a heel surface (36) of a bead (8) portion has an arc C that projects toward an outside of the bead (8) portion. A radius R of curvature of the arc C is greater than or equal to 8 mm and not greater than 12 mm.

Description

[0001] This application claims the priority of Japanese application Japanese Patent Application No. 2016-082806 for which it applied on April 18, 2016, and takes all the content of the Japanese application into this application as a reference. technical field [0002] The present invention relates to pneumatic tires. Background technique [0003] The tire is attached to the rim by fitting the bead to the rim. The bead fitted on the rim fastens the rim. The tire is fixed to the rim by this fastening force. When the vehicle is suddenly accelerated or decelerated, a large force is generated in the circumferential direction between the rim and the bead. When the fastening force of the bead is insufficient, "rim misalignment" in which the rim deviates from the bead may occur. Rim misalignment may result in a decrease in handling stability or vibration of the vehicle while running. [0004] By making the diameter of the core of the bead smaller than the diameter of the rim, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/04B60C15/05B60C15/024B60C15/028
CPCB60C15/024B60C15/028B60C15/04B60C15/05B60C2005/145B60C2015/046B60C15/06
Inventor 植田宪二
Owner SUMITOMO RUBBER IND LTD
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