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Pneumatic tire

A technology for pneumatic tires and tires, applied in tire parts, tire treads/tread patterns, transportation and packaging, etc., to suppress excessive deformation, improve performance on ice, and suppress uneven wear

Active Publication Date: 2016-03-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pneumatic tire of Patent Document 1 still has room for further improvement in terms of both performance on ice and wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Based on the specifications in Table 1, a trial production with figure 1 Pneumatic tires for heavy loads with basic pattern and size 11R22.5. As Comparative Example 1, such as Image 6 As shown, a tire having the same width in the tire circumferential direction of each block piece (undivided small block piece and large block piece) was trial-manufactured. The performance on ice, performance on snow, and abrasion resistance of each test tire were tested. Common specifications and test methods for each test tire are as follows.

[0074] Mounting rim: 8.25×22.5

[0075] Tire internal pressure: 900kPa

[0076] Test vehicle: a truck with a load capacity of 10t, loaded with a standard loading capacity of 5t in the center of the loading and unloading platform

[0077] Tire installation position: all wheels

[0078]

[0079] The running performance on ice of the test vehicle mounted with each test tire was evaluated by the driver's senses. The results are represented by ...

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Abstract

The invention provides a pneumatic tire, which can be used on ice and is wear resistant. The tread (2) of the pneumatic tire (1) is provided with a pair of central main ditches (5), a central area (5), and tire shoulder areas (7). The central area (5) and each tire shoulder area (7) are provided multiple patterned blocks (12), which are defined by fine ditches (10) extending along the circumferential direction of the tire and cross ditches (11) extending along the axis of the tire. At least one of patterned blocks (12) is divided into patterned block small sheets (51) and patterned block large sheets (52) by a plurality of sipings (50); wherein the width of the patterned block large sheets (52) is larger than that of the patterned block small sheets (51). In each patterned block (12), the patterned block small sheets (51) and patterned block large sheets (52) are alternatively arranged along the circumferential direction of the tire.

Description

technical field [0001] The present invention relates to a pneumatic tire having both performance on ice and wear resistance. Background technique [0002] Pneumatic tires in which sipes are provided on blocks have conventionally been proposed in order to improve performance on ice. Such a pneumatic tire improves the frictional force on icy roads by the road surface scraping action (hereinafter referred to as "edge effect") by the edge of the sipe. [0003] However, the rigidity of blocks provided with sipes tends to decrease, and the wear resistance tends to be low. [0004] For example, the following Patent Document 1 proposes a pneumatic tire in which the center region between the center main grooves extending zigzag on both sides of the tire equator and the shoulder region outside the center main groove have Multiple tread blocks divided by fine grooves. The block is divided into irregularly shaped block pieces by a plurality of sipes. Therefore, the pneumatic tire of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/11
Inventor 井藤仁
Owner SUMITOMO RUBBER IND LTD
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