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Pneumatic tires for driving on uneven ground

A pneumatic tire and ground technology, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problem of insufficient maintenance of turning performance, so as to promote smooth sliding and improve turning performance Effect

Inactive Publication Date: 2015-12-09
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 blocks generate a large traction force on uneven ground even when turning, so it is difficult for the ATV to make the tire slide while sliding smoothly, so there is a problem that the turning performance cannot be maintained sufficiently.

Method used

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  • Pneumatic tires for driving on uneven ground
  • Pneumatic tires for driving on uneven ground
  • Pneumatic tires for driving on uneven ground

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] Manufacturing has figure 1 and figure 2 Pneumatic tires for running on rough terrain having the basic structure shown in Table 1 and having blocks of the specifications shown in Table 1, and their performances were evaluated. In addition, the common specifications are as follows.

[0085] Tire size:

[0086] Front wheel: AT21×7R10

[0087] Rear wheel: AT20×10R9

[0088] Rim size:

[0089] Front wheel: 10×5.5AT

[0090] Rear wheel: 9×8.0AT

[0091] Land ratio SL / S: 20~30%

[0092] Width Wc of central area: 57.1mm

[0093] The width Wm of the middle area: 57.1mm

[0094] Width Ws of the shoulder area: 83.3mm

[0095] Pattern block:

[0096] Block height H1: 10~15mm

[0097] Recess:

[0098] Width W2: 3~5mm, Length L2: 20~30mm, Depth D2: 5~7mm

[0099] Chamfer:

[0100] Width W3a: 2~5mm, angle θ3a: 50 degrees

[0101] Notch:

[0102] Length L4b: 20-25mm, Width W4b: 1-3mm

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Abstract

The invention provides an inflation tire used for driving on a rough road surface, which has advantages of maintaining the drawing performance during the direct driving and improving the steering performance. In the inflation tire (1) provided in the invention, a plurality of pattern blocks (4) are disposed on a tire surface part (2), and are assigned with the rotating direction (R). The pattern blocks (4) comprises central pattern blocks (6), middle pattern blocks (7), and tire shoulder pattern blocks (8), which can form a long horizontal-shaped tire having a length (L1)of the tire in an axial direction longer than a width (W1) of the tire in a peripheral direction. The angles of the front edges (4a) of treads (4S) of the central pattern blocks (6), the middle pattern blocks (7), and the tire shoulder pattern blocks (8) relative to the tire in the axial direction (Cr theta, Mi theta, Sh theta) can be limited in the determined range.

Description

technical field [0001] The present invention relates to a pneumatic tire for running on uneven ground that can maintain traction performance during straight travel and improve cornering performance. Background technique [0002] For example, there is known an ATV (ALL TERRAIN VEHICLE: All Terrain Vehicle) for the purpose of running on uneven ground such as sandy ground or muddy ground. Since this ATV is not equipped with a differential device mounted on a car, the left and right tires rotate at the same rotational speed. Therefore, when such an ATV turns, it is necessary to turn at least one tire while slipping with respect to the road surface. [0003] In addition, in the pneumatic tire for running on rough terrain mounted on the above-mentioned ATV, generally, blocks formed as horizontally long blocks are provided on the tread portion. Such blocks can exhibit traction performance during straight running. Related techniques are as follows. [0004] Patent Document 1: Ja...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03
CPCB60C11/11
Inventor 榊原裕人
Owner SUMITOMO RUBBER IND LTD