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Pneunatic tyre

A technology of pneumatic tires and tires, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc. Anti-uniform wear performance, achieve the effect of spacing sound

Active Publication Date: 2016-01-27
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for tires with this pattern, the uneven wear resistance of the above-mentioned middle block j is insufficient, and further improvement is required.
In addition, although it has been proposed to increase the rigidity of the middle block j by reducing the groove width of the middle lateral groove h to improve the partial wear resistance, in this case, the drainage performance deteriorates and the wet performance is degraded.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Prototype according to the specifications in Table 1 to figure 1 The tread pattern of the basic pattern is a tire with a size of 195 / 80R15, and the noise performance, wet road performance, and partial wear resistance of each test tire are tested and evaluated. Additionally, the Figure 8The tire with the tread pattern is compared as Comparative Example 4. Except for those listed in Table 1, other specifications are actually the same, and the common specifications are as follows.

[0054] ·The groove width W3=5.0mm of the central main groove, the groove depth H3=9.7mm,

[0055] ·The groove width W5=2.0mm of the central auxiliary groove, the groove depth H5=9.7mm,

[0056] ·The groove width W6=7.0mm of the shoulder main groove, the groove depth H6=9.7mm,

[0057] ·Tread contact width TW=145mm,

[0058] The angle α of the ground contact front edge of the middle land portion = 5 degrees,

[0059] ・Land portion width of center land portion = 21mm,

[0060] ・Land porti...

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Abstract

The invention provides a pneunatic tyre which prevents water discharging performance and improves uneven wear resistance and noise performance. The tire tread is provided with a central main groove in an equatorial plane of the tire, a pair of central auxiliary grooves at two sides of the central main groove, and a pair of tire shoulder main grooves at two sides, thereby forming central landing parts, middle landing parts and tire shoulder landing parts. Each middle landing part is provided with middle transverse grooves which are separately arranged in a circumferential direction and respectively extend from the central auxiliary groove to the tire shoulder main groove in an angle beta in 10-20 DEG. Each middle transverse groove is composed of a large-width part which is connected with the central auxiliary groove, a small-width part which is connected with the tire shoulder main groove, and a transition part which connects the large-width part with the small-width part. The angle beta of the middle transverse groove is larger than the angle alpha of the grounding front edge part of the middle landing part in the shape of a grounding surface.

Description

technical field [0001] The present invention relates to a pneumatic tire having improved noise performance and uneven wear resistance without deteriorating drainage. Background technique [0002] As a pneumatic tire with improved abrasion resistance and water drainage, the following Patent Document 1 describes Figure 8 Tread pattern shown. This tire has a central main groove b continuously extending in the circumferential direction on the tire equatorial plane Co in the tread portion a, and a center main groove b continuously extending in the circumferential direction on both sides of the central main groove b and having a narrower groove width than the central main groove b. A center land portion e is formed between the center main groove b and the center auxiliary groove c by pairing the center auxiliary groove c and a pair of shoulder main grooves d continuously extending in the circumferential direction on both sides of the center auxiliary groove c. An intermediate la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
Inventor 仲山裕之
Owner SUMITOMO RUBBER IND LTD
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