All-steel tubeless truck tire suitable for 5-degree tapered bead seat rim

Abstract

The invention provides an all-steel tubeless truck tire suitable for a 5-degree tapered bead seat rim, comprising a bead matched with the rim, wherein the outline of the bead is composed of a bead bottom arc, a bead heel arc and a bead side arc, the tangent of the bead heel arc relative to a horizontal line where the bead diameter at rim seat is forms a bead seat included angle, the range of the bead seat included angle is 7-10 degrees, the width of the projection of the inclined plane of the bead seat included angle and the bead heel arc on level is 50%-60% of the overall width of the bead, the bead diameter at rim seat is less than the calibration diameter of the rim, and the difference range is 3mm-5mm. According to the all-steel tubeless truck tire, the contact pressure between the tire and the rim is improved by increasing the amount of interference between the size of a bead base and the rim, and simultaneously the outline of the tire and the structural design are regulated to improve the rigidity at the bead position, thus reducing deformation creepage of the tire bead on the rim and ensuring air tightness of the tire.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to an all-steel load-carrying innerless tire suitable for 5° slanted bottom rims. This type of tire is assembled with 5° slanted bottom rims to ensure the air retention of vehicles running under standard air pressure and low pressure conditions. performance and performance. Background technique [0002] As the market demand changes, some all-steel heavy-duty tires for special purposes, such as 12.00R20, 14.00R20, and 16.00R20, have the need to increase the speed level and reduce the weight of the tire. Tires are designed to meet the requirements, and the size of the all-steel radial innerless tire specification rims used in the market are 15° deep groove rims of 22.5 and 24.5, and some special fields fix the rim size, resulting in the above 12.00R20, 14.00R20, 16.00 R20 specification tires need to be equipped with 5° inclined bottom rims. In order to ensure air tightness, a new desig...

AI Technical Summary

Problems solved by technology

[0003] The all-steel truck tires equipped with 5° slanted bottom rims in the current market all have an inner tube structure. The diameter of the bead of the tire is designed to be equal to the calibrated diameter of the rim, and the heel arc tangent is relative to the diameter of the bead. The angle formed by the horizontal line is smaller than the angle of the bead seat of the tire, or equivalent to the angle of the bead seat of the rim. According to the finite element analysis, it is found that the contact pressure between the bead and the rim of the tire with the above design is at most 5-6 MPa. The tire with the above design scheme Assembled on a 5° slanted bottom rim, the actual airtightness test found that the inflation pressure decreased and the bead leaked during the use of the tire, indicating that the contact pressure between the tire and the rim produced by the above design cannot meet the airtightness requirements of the tire

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