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High-capacity tire

A tire and tire circumferential technology, which is applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of poor water flow, insufficient wet road grip performance, etc. Effects of slippage, improvement of wet grip performance, and improvement of uneven wear resistance

Inactive Publication Date: 2012-05-30
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, in the tire proposed above, the horizontal narrow groove e is formed in a curved line shape including three linear lateral grooves e1, e2, and e3, so although the above-mentioned inclination angles α, β, and γ can be optimized, drainage When the flow of water becomes unsmooth, wet road grip performance becomes insufficient, etc., so further improvement is desired

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0051] In order to confirm the effect of the present invention, with figure 1 The tread pattern shown is a basic pattern, and a trial production of a truck tire (tire size 315 / 80 R22.5) was made in which the horizontal narrow grooves formed in the inner peripheral land portion were changed according to the specifications in Table 2. In addition, the wet road grip performance, uneven wear resistance performance and tread block defect resistance performance of each test tire were tested, and the results are recorded in Table 1.

[0052] in, Figure 6 (A)~(E), Figure 7 (A) to (D) show the groove width centerlines of the horizontal narrow grooves of the comparative example.

[0053] As an existing example, such as Figure 8 As shown, a curved linear tire in which the lateral narrow grooves are formed by three linear lateral grooves e1, e2, and e3 was trial-manufactured. The angles α, β, and γ of the respective lateral grooves e1, e2, and e3 with respect to the tire axial line...

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Abstract

Disclosed is a high-capacity tire, capable of improving uneven-wearing resistance performance and wet-path ground-gripping performance. A plurality of transverse grooves are arranged at the section from the internal circumference to the land part of the two sides of the tire equator C. The transverse grooves are formed to have an S-shaped structure, composed of external arc groove of tread side having the radius of curvature of R1 and an internal arc groove having the radius of curvature of R2. One side of the external arc groove closer to the circumferential direction of the tire than the transverse groove is provided with an arc center i 1. The other side of internal arc groove closer to the circumferential direction of the tire than the transverse grooves is provided with an arc center i 2. The radius of curvature R2 mentioned above ranges from 10 to 40 mm. Moreover, the radius of curvature R1 is less than radius of curvature R2, with the difference thereof less than 5mm. The central angle alpha of the external arc groove and the central angle beta of the internal arc groove range from45 to 90 degrees.

Description

technical field [0001] The present invention relates to a truck tire with improved uneven wear resistance and wet road grip performance. Background technique [0002] As a truck tire for use in trucks, passenger cars, etc. with improved uneven wear resistance and wet grip performance, the tire of the following Patent Document 1 is proposed. [0003] Among the proposed tires, such as Figure 8 As shown, the tread portion b is divided into a plurality of circumferential land portions d including inner circumferential land portions di and di arranged on both sides of the tire equator C by a plurality of longitudinal main grooves a extending in the tire circumferential direction. , and a horizontal narrow groove e including a narrow groove or a sipe that traverses the inner peripheral land portion di is formed on the inner peripheral land portion di. In addition, the above-mentioned lateral narrow groove e is formed by the inner lateral groove portion e1 on the tire axially inn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/13B60C11/12
Inventor 田中薰理
Owner SUMITOMO RUBBER IND LTD
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