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Accordion spiral overlay for a pneumatic tire

A technology for pneumatic tires and covering layers, applied to the reinforcement layer of pneumatic tires, pneumatic tires, tire parts, etc., which can solve the problems of increased tire weight, decreased corner stiffness, and increased hoop force

Active Publication Date: 2013-10-30
THE GOODYEAR TIRE & RUBBER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the belt ply may have a double layer structure even in the center region, which may result in an increase in hoop force in the center region and a decrease in corner stiffness
The weight of the tire will also increase

Method used

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  • Accordion spiral overlay for a pneumatic tire
  • Accordion spiral overlay for a pneumatic tire
  • Accordion spiral overlay for a pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0135] exist figure 1 and figure 2 Among them, a pneumatic tire 1 may include: a pair of bead cores 5 each arranged in each bead portion 4 of the pneumatic tire; a carcass 6 extending through the tread portion 2 and the tread portion of the pneumatic tire between the bead portions A sidewall portion 3, and optionally a turnup around a bead core 5 from the inner side of the pneumatic tire to the outer side of the pneumatic tire seat; and a belt reinforcement arranged between the carcass and the tread portion. The tread portion 2 may be arranged radially outside the carcass 6 . The belt reinforcement may include: breaker layers 7a, 7b arranged radially outside of the carcass 6; and cover ply 9 or belt ply arranged radially outside of the cover breaker.

[0136] The carcass 6 may include at least one cord ply arranged radially at 70 to 90 degrees with respect to the equatorial plane EP of the pneumatic tire 1 . These cords may be cords of inorganic fibers, such as steel, glas...

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PUM

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Abstract

The invention relates to an accordion spiral overlay for a pneumatic tire. Concretely, the pneumatic tire includes a carcass and a belt reinforcement structure. The carcass has one ply of parallel cords extending proximately to bead portions. The belt reinforcement structure is disposed radially outside of the carcass. The belt reinforcement structure includes an overlay ply. The overlay ply includes a strip of parallel cords wound spirally and circumferentially from a first axially outer side of the overlay ply to a second axially outer side of the overlay ply. The distance between corresponding parts of adjacent strip windings defines a winding pitch. The winding pitch of the strip changes in an axially inward direction of the pneumatic tire towards the equatorial plane of the pneumatic tire such that the winding pitch in a central region of the belt reinforcement structure is increased relative to respective first and second axially outer sides of the overlay ply on each side of the equatorial plane of the pneumatic tire.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more particularly, to an overlay ply for a pneumatic tire. Background technique [0002] Conventionally, a radial ply tire may be provided with a belt reinforcement including a breaker ply and a belt ply (or cover), wherein the belt cords may be laid substantially parallel to the circumferential direction of the tire, and the breaker cords Can be tilted with respect to the circumferential direction. The edge ply is effective in increasing the hoop force at the edge of the breaker and thus effectively preventing the ply edge from slack and separation. [0003] Such a belt ply may be formed by winding a ply material having the same width as its final processed width around the carcass, and ends of the ply may overlap at a predetermined length. Therefore, thickness and stiffness increase at the overlap, and RRO (radial run-out) increases, and moreover, uniformity of the tire is disturbed. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18B60C5/00
CPCB60C9/22B60C2009/2271B60C9/2009B60C9/20B60C9/18B60C9/2204B60C2009/2219B60C9/28
Inventor B.J.F.克鲁瓦桑
Owner THE GOODYEAR TIRE & RUBBER CO