pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve problems such as uneven wear of pattern blocks, and achieve improved traction performance and lateral grip performance. Effect

Active Publication Date: 2018-03-06
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, such a pneumatic tire has a problem that the blocks on both sides of the circumferential groove tend to be unevenly worn.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Trial-manufactured according to the specifications in Table 1 with figure 1 The size of the basic pattern in the test is 205 / 65R15 pneumatic tires, and the traction performance, lateral grip performance and wear resistance performance of each test tire are tested. The main general specifications and test methods of each test tire are as follows.

[0050] Tread contact width TW: 200mm

[0051] Groove depth of inclined groove: 8.0mm

[0052] Groove depth of connection groove: 8.0mm

[0053]

[0054] The test tires were mounted on all wheels of a four-wheel drive vehicle having a displacement of 2000 cc under the following conditions. The test driver drives the vehicle on a mud cross-country track with a length of 2.5 km for one week, and evaluates the traction performance and lateral grip performance at this time according to the test driver's sensory experience. The test results are represented by evaluations on a scale of 1 to 5. Larger numbers indicate better pe...

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PUM

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Abstract

The invention provides a pneumatic tire, wherein the traction performance, the laterally ground-gripping property and the anti-wear performance of the pneumatic tire are improved evenly. The pneumatic tire (1) comprises inclined trenches (3) and connection trenches (4). The inclined trenches (3) are inclined towards one side relative to the axial direction of the pneumatic tire. The connection trenches (4) are used for connecting adjacent inclined trenches (3, 3) in the circumferential direction of the tire. A plurality of pattern blocks (5) arranged between the inclined trenches (3, 3) are aligned along the inclined trenches (3) to form a pattern block array (15). The connection trenches (4) are composed of a pair of end portions (8) at an angle (theta 1) smaller than 5 DEG C relative to the circumferential direction of the tire, and a central portion (9) at an angle (theta 2) larger than the angle (theta 1) of the end portions relative to the circumferential direction of the tire. The maximum length of the pattern block array (15) in the axial direction of the tire is 60% to 90% the grounding width of the tread of the tire.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of improving traction performance, lateral grip performance and wear resistance performance in a balanced manner when running on uneven ground such as a rally or dirt trial. Background technique [0002] For example, for pneumatic tires used for driving on uneven ground such as rallies, traction performance for firmly grasping the road surface to obtain driving force, and lateral grip performance for suppressing side slip of the tire when cornering are required . [0003] For example, Patent Document 1 below proposes a pneumatic tire having a plurality of circumferential grooves in which first portions inclined toward one side in the tire circumferential direction and opposite to the first portions are alternately arranged. The second part of the slant direction. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2001-180230 [0005] However, such a pneumatic tire has a problem that un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04
Inventor 中野敏幸
Owner SUMITOMO RUBBER IND LTD
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