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Pneumatic tire and its manufacturing method

A technology of a pneumatic tire and a manufacturing method, which is applied to tire parts, tires, and other household appliances, and can solve problems such as inability to fully absorb shock or vibration, and poor ride comfort, so as to maintain ride comfort and improve ride comfort. Bending rigidity, effect of improving response performance

Inactive Publication Date: 2016-06-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the tread reinforcement layer is added, there is a problem that the rigidity of the entire tread portion tends to become too high, and the impact or vibration from the road surface cannot be sufficiently absorbed, resulting in poor ride comfort.

Method used

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  • Pneumatic tire and its manufacturing method
  • Pneumatic tire and its manufacturing method
  • Pneumatic tire and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] Manufacturing is formed as figure 1 The tires with the basic structure shown in Table 1 with the tread facing inward ribs and / or the main groove facing inward ribs, and their performance was evaluated. In addition, for comparison, the same test was performed on a tire (Comparative Example 1) that did not have the tread facing inward ribs and the main groove facing inward ribs. Among them, the common specifications are as follows.

[0089] Tire size: 215 / 45R17

[0090] Rim size: 17×7J

[0091] Maximum tread thickness W3: 10mm

[0092] Tread:

[0093] The width of the central tread W4a: 20mm

[0094] The width of the middle tread W4b: 25mm

[0095] Width of shoulder tread W4c: 30mm

[0096] Main groove:

[0097] Maximum width W1: 10mm

[0098] Groove depth D1: 8mm

[0099] The area inside the main groove:

[0100] The width of the inner area of ​​the central main groove W7a: 10mm

[0101] The width of the inner area of ​​the shoulder main groove W7b: 8mm

[0102] The test method is as fol...

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Abstract

The invention provides a pneumatic tire and a method of manufacturing the same, maintaining ride comfort and improving responsibility close to a neutral gear. The pneumatic tire (1) has at least one main groove continuously extending along the tire periphery and treads (12) contacted with a road surface at the outer surface (2S) of a tire surface part (2). The pneumatic tire (1) is provided with tread inward ribs (16) which are protruding toward the inner side in the tire radial direction and extend along the tire periphery at an inner cavity surface (10) of the treads (2) and in tread inner regions (15) of the inner side in the tire radial direction of the treads (12).

Description

Technical field [0001] The present invention relates to a pneumatic tire capable of maintaining ride comfort and improving responsiveness near neutral and a manufacturing method thereof. Background technique [0002] A pneumatic tire having, for example, at least one main groove continuously extending in the tire circumferential direction and a tread surface in contact with the road surface on the outer surface of the tread portion is known (for example, refer to Patent Document 1). [0003] Since the tread surface directly contacts the road surface, it is desired to sufficiently increase the rigidity in the tire circumferential direction of the land portion on which the tread surface is formed. In particular, in order to improve the response performance in the vicinity of the neutral position where the slip angle at the start of turning is small, it is preferable to increase the bending rigidity in the tire circumferential direction of such a land portion. [0004] Patent Document ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C19/00B29D30/12
Inventor 两角顺一郎
Owner SUMITOMO RUBBER IND LTD