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pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc. It can solve problems such as difficulty in balancing, increased resonance vibration, and deteriorated noise performance, and achieves maximum traction performance , Increase the shear force and improve the performance of the mud road

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

[0003] However, in the above-mentioned method, since the groove volume of the main groove and the lateral groove is increased, the resonant vibration of the air (air column resonance sound) generated in the groove is increased, so that there is a problem that the noise performance deteriorates when driving on a dry road surface.
In this way, improving mud road performance and ensuring noise performance are antinomy relations, and it is difficult to balance both

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0053] Manufacturing has figure 1 The tread pattern and the pneumatic tires (size: 285 / 60R18) based on the specifications in Table 1 were tested for their various properties. Among them, the common specifications are as follows.

[0054] Ground width TW: 200mm

[0055]

[0056] Groove width W1 / ground width TW: 3.1%

[0057] Groove depth D1: 10.0mm

[0058] The angle θ1 of the transition part relative to the tire axial direction: 45 degrees

[0059] Ratio La / Lb of the tire circumferential lengths of the inner groove portion and the outer groove portion: 1.17

[0060]

[0061] Groove width W2 / ground width TW: 4.1%

[0062] Groove depth D2: 10.0mm

[0063] The angle of the central transition part relative to the tire axis: 40 degrees

[0064]

[0065] Groove depth D3 / D1: 90%

[0066]

[0067] Groove depth 5.0~8.0mm

[0068]

[0069] Groove depth 3.0~5.0mm

[0070] The test method is as follows.

[0071]

[0072] Install the test tires on all the wheels of t...

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Abstract

The pneumatic tire of the present invention suppresses deterioration of noise performance and improves mud performance. A pneumatic tire (1) is provided with shoulder longitudinal grooves (3) and shoulder lateral grooves (8). The shoulder longitudinal grooves (3) are formed as serrations in a trapezoidal wave shape. In the shoulder lateral groove (8), the intersection point (P1) where the groove center line (8G) and the shoulder longitudinal groove (3) intersect, and the intersection point (P2) between the groove center line (8G) and the grounding end (Te) are connected The angle of the straight line with respect to the tire axial direction is 5 to 20 degrees. The groove width of the shoulder lateral groove (8) gradually increases, and the ratio between the groove width (Wo) at the ground contact end (Te) and the groove width (Wi) at the connecting portion with the shoulder longitudinal groove (3) Wo / Wi is 1.5 to 3.0. Among the shoulder lateral grooves (8), a groove intersection (20) on the one side where the groove wall (8A) of the shoulder lateral groove (8) intersects with the shoulder longitudinal groove (3) is located at a distance greater than that of the shoulder lateral groove (8). The groove intersection (21) on the other side where the groove wall (8B) on the other side of (8) intersects with the shoulder longitudinal groove (3) is further inward in the tire axial direction.

Description

technical field [0001] The present invention relates to a pneumatic tire that suppresses deterioration of noise performance and improves mud road performance. Background technique [0002] For example, four-season general-purpose tires running on muddy roads use a block pattern. pattern blocks. Conventionally, in order to improve the performance of mud roads, it is known to increase the depth and width of the main trenches and lateral trenches to improve the soil-discharging performance, or to cut the shearing force of the mud compacted in the transverse trenches. [0003] However, in the above-mentioned method, since the groove volume of the main groove and the lateral groove is increased, the resonant vibration of the air (air column resonance sound) generated in the groove is increased, so that there is a problem that the noise performance deteriorates when driving on a dry road surface. . In this way, improving the mud road performance and ensuring the noise performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C2011/0346B60C11/01B60C11/03B60C11/04B60C11/11
Inventor 田麦显大
Owner SUMITOMO RUBBER IND LTD