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pneumatic tire

A technology for pneumatic tires and tires, which is applied to off-road vehicle tires, tire parts, tire treads/tread patterns, etc., can solve problems such as insufficient effects, and improve soil removal performance, adhesion, and mud performance Effect

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

[0006] However, this proposal only stops at the improvement of the shoulder land portion, so the effect is not sufficient, so there is room for further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail.

[0037] exist figure 1In the pneumatic tire 1 of the present embodiment, the tread portion 2 is provided with a pair of shoulder main grooves 3 extending in the tire circumferential direction on the side closest to the tread contact end Te, and between the pair of shoulder main grooves. 3. One or two main grooves 4 of the crown extending along the circumferential direction of the tire. Thereby, the shoulder land portion 5 is formed on the outer side in the tire axial direction of the shoulder main groove 3 , and the intermediate land portion 6 is formed between the shoulder main groove 3 and the crown main groove 4 . In this example, the case where two crown main grooves 4 are provided is illustrated, and a crown land portion 7 is formed between the crown main grooves 4 and 4 .

[0038] The shoulder land portion 5 is provided with shoulder lateral grooves 8 at intervals in the tire circum...

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Abstract

The present invention provides a pneumatic tire excellent in mud performance and noise performance. This pneumatic tire has a shoulder land portion and a middle land portion divided by a shoulder main groove and a crown main groove. The shoulder land portion is formed as a row of shoulder blocks by the shoulder lateral grooves, and the middle land portion is formed as a substantially continuous circumferential rib. The middle land portion has a width gradually decreasing toward the inner side of the tire axial direction from the shoulder main groove, and extends obliquely in the same direction at angles θ1, θ2 with respect to the tire axial line, and exceeds the middle of the width of the middle land portion The location of the point forms the first and second medial outer slits of the terminal. θ1<θ2. The openings of the first and second middle outer slits at the shoulder main grooves are provided at positions opposite to the openings of the shoulder lateral grooves at the shoulder main grooves.

Description

technical field [0001] The present invention relates to a pneumatic tire that combines mud performance and noise performance. Background technique [0002] For tires mounted on four-wheel drive vehicles that not only run on paved urban ground but also on uneven ground such as muddy ground, on the one hand, the so-called mud performance is required to exert sufficient driving force on muddy ground, and on the other hand On the one hand, excellent noise performance such as quietness is required when driving on urban ground with paved roads. [0003] In addition, the following Patent Document 1 proposes a tire capable of achieving both the above-mentioned mud performance and noise performance. [0004] like Image 6 As an illustration, the tire of this proposal has a shoulder land portion rs and a middle land portion rm divided by a shoulder main groove gs and a crown main groove gc, and the shoulder land portion rs is divided by the shoulder lateral groove ys and is formed as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03
CPCB60C11/0306B60C2011/0365B60C2011/0381B60C2011/0388B60C11/01B60C11/03B60C11/04B60C11/11B60C11/12B60C2011/0346B60C2011/0358B60C2200/14
Inventor 田麦显大
Owner SUMITOMO RUBBER IND LTD