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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve problems such as insufficient assistance in cornering performance and inability to obtain compacted snow columns, etc., to improve driving force effect

Active Publication Date: 2012-04-11
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pattern blocks provided with such sipes can only be deformed in the transverse direction when the transverse force acts, and cannot obtain the effect of compacting the snow column in the transverse groove.
In other words, does not provide sufficient assistance for cornering performance on snow

Method used

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  • Pneumatic tire
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  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] to figure 1 , figure 2 And the specifications in Table 1 to manufacture radial tires with a size of 11R22.5, the performance on snow and the performance on ice were tested. Additionally, if Figure 5 As shown, the same test was carried out on a tire of the same size (comparative example) having a pattern in which sipes were arranged in parallel. Common specifications are as follows.

[0052] Tread contact width TW: 220mm

[0053] Groove width GW1 of the main longitudinal groove: 7.0mm

[0054] Groove width GW2 of auxiliary longitudinal groove: 2.0mm

[0055] Groove width GW3 of the transverse groove: 7.0mm

[0056] Width GW4 of the sipe: 1.0mm

[0057] In addition, the outer contours of the blocks in Examples and Comparative Examples are the same. In addition to Example 4, the length BL2 of the inner wall surface of the sub block piece in the tire circumferential direction was uniformly 5.0 mm, and only BL1 was changed by changing the angles of the sipe S1 and ...

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PUM

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Abstract

The invention provides a pneumatic tire which can increase the turning ability on snow. The invention is characterized in that the tire-surface (2) is provided with at least one pattern block array (BL1 to BL4) which drives a plurality of pattern blocks (B) to array along the circumference of the tire through a plurality of longitudinal channels (Gm and Gs) and a plurality of transverse channels (gl to g4) positioned between the longitudinal channels transversely, which are extended along the circumference of the tire continuously, wherein, at least one pattern block (B) is divided into main pattern-block sheets (Bm) positioned at the two peripheral sides of the tire and vice pattern-block sheets (Bs) which is formed between the main pattern-block sheets (Bm), taking a wedge shape in a plane, and whose peripheral tire length is decreased from one axial side of the tire to the other side, through a pair of cutter-groove patters (S1 and S2) extending relative to the tire axial directionin a reverse direction. The axial tire width of the pattern-block sheets (Bs) is smaller that that of the main pattern-block sheets (Bm).

Description

technical field [0001] The present invention relates to a pneumatic tire capable of improving cornering performance on snow. Background technique [0002] Pneumatic tires such as winter tires, snow tires, or studless tires that have improved driving performance on snow have a plurality of blocks divided by longitudinal grooves and lateral grooves on the tread portion. Furthermore, in such a tire, by increasing the reaction force when shearing the snow column compacted in those grooves, the drivability on snow and the cornering performance can be improved. The following Patent Document 1 is proposed as a technique for improving running performance on snow. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2003-118321 [0004] The aforementioned Patent Document 1 discloses a block provided with a plurality of sipes extending substantially in parallel. This sipe improves on-ice performance by removing the water film on the road surface through the wiping effect or ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/113
Inventor 芝野圭三
Owner SUMITOMO RUBBER IND LTD