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solid tire

A technology for solid tires and tires, which is applied to tire parts, wheels, non-pneumatic tires, etc., can solve the problems of c1 damage to the web portion and the reduction of the durability of solid tires.

Active Publication Date: 2020-01-21
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, there is a problem that the durability of the solid tire decreases due to early damage to the web part c1 due to the repeated bending deformation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Based on the specifications in Table 1, prototypes with figure 1 , figure 2 The basic structure of solid tires (tires with a tire size equivalent to 145 / 70R12), and the durability of the tires, the quality of the tires, and the rolling resistance were tested separately. In addition, in Comparative Example 1, the case where the web portion and the tread-side annular portion, and the web portion and the hub-side annular portion are connected without tapering regions is shown, and in Comparative Example 2, The case where the connection is made by a small arc-shaped tapered area is shown.

[0069] Each tire uses a polyurethane-based resin to form the spokes. The specifications other than those described in Table 1 are substantially the same, and the general specifications of the tread ring are as follows.

[0070]

[0071] ·Number of ply layers: two layers

[0072]Reinforcement cord: steel cord

[0073] The angle of the cord: +21 degrees / -21 degrees

[0074]

[...

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PUM

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Abstract

The present invention relates to a solid tire that suppresses damage to spokes and improves durability. A solid tire (1) uses spokes (4) to connect a tread ring (2) to a hub (3). The spoke (4) includes a web portion (10) connecting a tread-side annular portion (8) and a hub-side annular portion (9). The web part (10) has: a first thickness decreasing area (Ya), which gradually reduces the thickness T from the first connection position (Pa) connected to the hub side annular part (9); the second thickness gradually decreases a region (Yb) that gradually reduces the thickness T from the second connection position (Pb) connected to the tread side annular portion (8); and a minimum thickness region (Ym) that is arranged in the first thickness decreasing region (Ya) and the second thickness decreasing region (Yb). The length L1 of the first gradually decreasing thickness region and the length L2 of the second gradually reducing thickness region are at least 0.05 times the length L0 of the web portion.

Description

technical field [0001] The present invention relates to a solid tire with improved durability by suppressing damage to spokes. Background technique [0002] In a pneumatic tire that bears a load by being filled with internal pressure, generation of air leakage cannot be avoided in terms of structure. In order to solve such problems, in recent years, solid tires having the following configurations, such as Figure 6 As shown schematically, the tread ring a and the hub b are connected by a spoke c composed of a plurality of web portions c1 arranged radially (for example, refer to Patent Document 1). also, Figure 6 The load load state of the tire is shown. [0003] In the tire having the above-mentioned structure, the hub b and the axle d are held in a suspended manner by the web portion c1 located above the axle d. Therefore, when the load F is applied to the axle d, a tensile force acts on the web part c1 located above the axle d to generate tension, and a compressive forc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C7/00B60B3/04B60B3/12
CPCB60B3/002B60B3/04B60B3/12B60C7/00B60B2900/212B60C7/101B60B1/0246B60B1/0261B60B5/02B60B9/26B60C7/18B60C7/22B60C7/146B60C7/14B60B1/02
Inventor 岩村和光杉谷信
Owner SUMITOMO RUBBER IND LTD