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winter tires

A technology for tires and shoulders, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as deviation, achieve high traction performance, high lateral grip, and prevent snow The effect of clogging

Active Publication Date: 2018-05-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is a tendency to form protrusions extending in the traveling direction on the snowy road surface due to the comb-shaped snow grooming sheet of the road maintenance vehicle.
In the case of running on such a snowy road with the above-mentioned winter tires, there is a problem that the longitudinal groove of the tire engages with the protrusions, so that the vehicle is easily guided along the protrusions.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0101] Based on the specifications in Table 1, a trial production with figure 1 The basic pattern is a winter tire for passenger cars of size 205 / 60R16. As Comparative Example 1, a tire having only main grooves extending continuously over one tire revolution and lateral grooves extending in the tire axial direction was trial-produced. The on-snow performance and the anti-running performance of each test tire were tested. The general specifications and test methods of each test tire are as follows.

[0102] Mounting rim: 16×6.5

[0103] Tire internal pressure: front wheel 240kPa, rear wheel 220kPa

[0104] Test vehicle: Displacement 2000cc, front-wheel drive vehicle

[0105] Tire installation position: all wheels

[0106]

[0107] The running performance on snow of the test vehicle mounted with each test tire was evaluated by the driver's senses. The results are represented by a score of 100 for Comparative Example 1, and the larger the numerical value, the better the o...

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Abstract

The present invention provides a winter tire capable of improving on-snow performance without impairing the anti-running performance. A winter tire (1) having a tread portion (2) is provided with a plurality of first inclined main grooves (11) on the tread portion (2), which extend obliquely from one tread end (Te1) and cross the tire equator (C) forming a terminal end without reaching the other tread end (Te2); first inclined auxiliary grooves (21), which are arranged between the first inclined main grooves (11); a plurality of second inclined main grooves ( 12), they extend obliquely from the other tread end (Te2) in the opposite direction to the first inclined main groove (11) and cross the tire equator (C) to form a terminal without reaching the one tread end (Te2 ); the second inclined auxiliary groove (22), which is arranged between the second inclined main grooves (12); a plurality of first longitudinal grooves (31), which divide each first land portion (5A); and a plurality of first 2 longitudinal grooves (32) which divide each second land portion (5B).

Description

technical field [0001] The present invention relates to winter tires having excellent on-snow performance. Background technique [0002] In the following patent document 1, in order to improve on-snow performance, a tread portion is provided with a plurality of longitudinal grooves extending linearly and continuously in the tire circumferential direction, and a transverse groove crossing the land portion between the longitudinal grooves. Ditch for winter tires. [0003] However, on the snowy road surface, protrusions extending in the traveling direction tend to be formed by the comb-shaped snow grooming sheets of the road maintenance vehicle. When driving on such a snowy road with the above-mentioned winter tires, there is a problem that the longitudinal grooves of the tires engage with the protrusions, so that the vehicle tends to deflect while being guided along the protrusions. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2006-298202 Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03B60C11/13B60C11/16B60C11/12
CPCB60C2011/0367B60C11/0302B60C11/1625B60C2011/0346B60C2011/1209B60C11/1236B60C2011/0374B60C11/11B60C11/16B60C11/0304B60C11/13B60C11/1369B60C2011/0358
Inventor 阿部颂太朗东浦一树
Owner SUMITOMO RUBBER IND LTD
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