Load inflation tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of reducing drainage performance, reducing main groove 3, and not being able to fully reduce stone inclusions, etc., to achieve reduction Contact area and pressing force, reduce the effect of stone inclusion

Active Publication Date: 2012-07-11
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned protrusion 35 is easily deformed due to the contraction of the main groove 3 when it is grounded, and thus cannot sufficiently reduce stone inclusions.
In addition, since the protrusion 35 reduces the groove volume of the main groove 3, there is also the problem that the drainage performance is easily reduced.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0076] Manufacturing has figure 1 The tires having the basic structure shown in Table 1 and having the tread portion of the central main groove shown in Table 1, and their performances were evaluated. In addition, as a comparison, it is also necessary to have Figure 10 The shown tire (comparative example 1) of the tread portion of the projection (length: 6.5 mm, width: 3.0 mm, height: 3.5 mm) for preventing stone trapping, and the angle of the gently sloped portion of the tread side from the concave corner to the convex corner The tires (Comparative Example 2) whose parts gradually increased were also subjected to the same test. Among them, the common specifications are as follows.

[0077] Tire size: 11.00R20

[0078] Rim size: 8.0V×20

[0079] Tread width TW: 226mm

[0080] Central Main Ditch:

[0081] Groove width W1: 16mm

[0082] Groove depth D1: 17mm

[0083] Sawtooth swing V1: 16mm

[0084] Ratio (V1 / TW): 7%

[0085] Sawtooth pitch P1: 79mm

[0086] Ratio (P...

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Abstract

The invention discloses a load inflation tire, which can be used to remain the drainage performance and reduce the stones. The load inflation tire is provided with at least a central main groove extending in a tooth-shaped manner on the central area. The central main groove comprises a groove bottom and a pair of groove walls extending from the groove bottom to the tire surface treading surface. Each of the groove walls is provided with groove bottom side steep inclined part and a treading surface side slowly inclined part extending from the external end of the tire of the groove bottom side steep inclined part to the tire surface treading surface, and extends at an angle, which is larger than the groove bottom side steep inclined part. The groove width of the groove bottom side steep inclined part is in a range of from 2 to 8 cm. Each groove wall comprises a concave corner part of the central main groove, and a protruding corner part being bent toward the opposite direction of the central line of the groove. The angle of the treading surface side slowly inclined part is increased gradually from the protruding corner part to the concave corner part.

Description

technical field [0001] The present invention relates to a pneumatic load tire capable of maintaining drainage performance and reducing stone inclusion. Background technique [0002] In order to ensure drainage performance, one or more wide main grooves extending continuously in the tire circumferential direction are provided on the tread portion of the pneumatic tire. For example, when the main ditch is driven at a construction site or the like, a so-called stone trap, in which small stones are caught and kept in a state where the small stones are caught, is likely to occur. Such stone inclusions are particularly likely to occur in heavy-duty pneumatic tires with a large tread pressure and a large groove depth, so there is a problem that rubber chips or cracks occur near the main groove. [0003] As a technique for suppressing such stone inclusions, such as Figure 10 As shown, it is proposed that at the bottom of the main groove 3 and at a position separated from the groov...

Claims

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Application Information

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IPC IPC(8): B60C11/13
CPCB60C11/01B60C11/04B60C11/13
Inventor 李庆茂
Owner SUMITOMO RUBBER IND LTD
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