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tire

A tire, tire circumferential technology, applied in the direction of tire parts, tire tread/tread pattern, vehicle parts, etc.

Active Publication Date: 2021-04-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the tire of Patent Document 1 still has room for further improvement in improving snow performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Based on the specifications in Table 1, a trial production with figure 1 The basic tread pattern is a tire of size 255 / 55R18. As Comparative Example 1, such as Figure 4 As shown, a tire without the inner inclined sub-groove and the outer inclined sub-groove was trial-manufactured. As Comparative Example 2, such as Figure 5 Shown is a trial production of a tire provided with an outer inclined auxiliary groove and not provided with an inner inclined auxiliary groove. The on-snow performance, wet performance, and wear resistance of each test tire were tested. The general specifications and test methods of each test tire are as follows.

[0069] Mounting rim: 18×8.0J

[0070] Air pressure: front wheel 230kPa, rear wheel 250kPa

[0071] Test vehicle: Displacement 3000cc, four-wheel drive vehicle

[0072]

[0073] The distance when the above-mentioned test vehicle is accelerated from 5 km / h to 20 km / h on snow is measured by GPS and the average acceleration is calcu...

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Abstract

The present invention provides a tire capable of exhibiting excellent on-snow performance. The tire has a tread portion (2). The tread portion (2) has a first tread portion (2A) between the tire equator (C) and the first tread end (Te1). The first tread portion (2A) is provided with: a crown main groove (5) extending linearly along the tire circumferential direction on the tire equator (C) side, extending from the first tread end (Te1) toward the tire equator ( C) A plurality of inclined main grooves (10) extending obliquely and crossing the crown main groove (5), and an inclined land portion (20) divided between adjacent inclined main grooves (10) in the tire circumferential direction . At least one inclined land portion (20) is provided with: an inner inclined auxiliary groove (13), which is on the outer side of the crown main groove (5) in the tire axial direction, extends from the inclined main groove (10) and is on the inclined land portion (20 ) inner interruption; the outer inclined auxiliary groove (14), which is on the outer side of the tire axial direction of the inner inclined auxiliary groove (13), and traverses the inclined land portion (20).

Description

technical field [0001] The present invention relates to a tire capable of exhibiting excellent on-snow performance. Background technique [0002] For example, Patent Document 1 below proposes a winter tire provided with a crown main groove extending linearly continuously in the tire circumferential direction and a plurality of inclined main grooves traversing the crown main groove. [0003] However, the tire of Patent Document 1 still has room for further improvement with respect to the improvement of on-snow performance. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2013-136333 Contents of the invention [0005] The present invention has been made in view of the above problems, and a main object of the present invention is to provide a tire capable of exhibiting excellent on-snow performance based on an improved arrangement of grooves. [0006] The tire of the present invention has a tread portion having a first tread portion between the tire equator and a f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/03B60C11/1272B60C2011/1286B60C2011/0381B60C2011/0341B60C2011/0374B60C11/0302B60C11/0309B60C11/0332B60C11/12B60C2011/0358B60C2011/0376
Inventor 岩田康孝
Owner SUMITOMO RUBBER IND LTD
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