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pneumatic tire

一种充气轮胎、轮胎的技术，应用在轮胎零部件、轮胎胎面/胎面花纹、运输和包装等方向，能够解决沟容积减小、排水性能降低等问题，达到提高操纵稳定性能和耐偏磨损性能的效果

Active Publication Date: 2016-04-27
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is a problem that when the land ratio on the outer side of the vehicle is too large, the volume of the ditch decreases and the drainage performance decreases
Therefore, there is room for further improvement for methods that rely only on land ratios

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Made to form figure 1 The performances of tires having the basic structures shown in Table 1 and the longitudinal grooves, lateral grooves and land portions were evaluated. Among them, the common specifications are as follows.

[0090] Tread contact width TW: 182mm

[0091] Lateral central longitudinal groove:

[0092] Maximum groove depth D1a: 9.5mm

[0093] Medial central longitudinal groove:

[0094] Maximum groove depth D1b: 9.5mm

[0095] Outer shoulder longitudinal groove:

[0096] Maximum groove depth D1c: 9.5mm

[0097] Inner shoulder longitudinal groove:

[0098] Maximum groove depth D1d: 9.5mm

[0099] Outer shoulder groove:

[0100] Groove width W2: 3.8mm

[0101] Groove depth D2: 7.5mm

[0102] Angle α1a: 60-90 degrees

[0103] Outer middle transverse groove:

[0104] Groove width W3: 3.8mm

[0105] Groove depth D3: 7.5mm

[0106] Angle α1b: 50-70 degrees

[0107] Central Land Division:

[0108] Land part width W3a: 11.4mm

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Abstract

The pneumatic tire of the present invention can maintain drainage performance and improve steering stability performance and uneven wear resistance performance. The pneumatic tire (1) is assigned a mounting orientation towards the vehicle. The outer shoulder longitudinal groove (4A) has a smaller groove width W1c than the pair of central longitudinal grooves (3A, 3B) and the inner shoulder longitudinal groove (4B). In addition, the outer middle land portion (7A) has a larger land portion width W3b than the inner middle land portion (7B). In addition, the inner end (5Ai) of the outer shoulder lateral groove (5A) and the outer end (5Bo) of the outer middle lateral groove (5B) are shifted in the tire circumferential direction, and the outer middle land portion ( 7A) is provided with an outer middle A narrow groove (13) that connects the inner end (5Ai) of the outer shoulder lateral groove (5A) to the outer end (5Bo) of the outer middle lateral groove (5B), and the groove width W4 is less than The groove width of the outer shoulder lateral groove and the outer middle lateral groove.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of maintaining drainage performance and improving steering stability and uneven wear resistance. Background technique [0002] Conventionally, in order to improve the steering stability and uneven wear resistance of a pneumatic tire, the rigidity of the land portion is generally increased by increasing the land ratio of the tread portion. Especially for tires whose mounting direction to the vehicle is specified, it is very effective to increase the land ratio on the outer side of the vehicle where the ground contact pressure increases when cornering. Among them, related technologies are as follows. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-6987 [0004] However, there is a problem that if the land ratio on the outer side of the vehicle is too large, the volume of the groove decreases and the drainage performance decreases. Therefore, there is room for further improvement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03
CPCB60C11/0304B60C11/1369B60C2011/0348B60C2011/0353B60C2011/0369B60C2011/0372B60C2011/0381B60C2011/0388B60C11/01B60C11/03B60C11/04B60C11/13B60C11/12B60C11/0306B60C11/032
Inventor 羽田圭宽
Owner SUMITOMO RUBBER IND LTD
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