Radial tire with belt work ply cords arranged at 90 degrees in circumferential direction

Abstract

The invention provides a radial tire with belt work ply cords arranged at 90 degrees in the circumferential direction. The radial tire is characterize in that the lower side of a shoulder wedge is connected with a carcass ply, the upper side of the shoulder wedge is connected with a first belt ply and tread rubber respectively, sidewall rubber is connected with the side surface of the tread rubber, and both the first belt ply and a second belt ply are arranged at 90 degrees. According to the radial tire, a section curve is usually parallel to a tread design curve; the work plies circumferentially arranged at 90 degrees are orthogonal to a carcass at 0 degree in the radial direction, and basic features of an orthogonal tire are formed. Compared with existing various steel wire belt ply structures, the radial tire has the advantages that the maximum value of the strain energy density in rubber parts in a crown area is reduced by 50%-80% and is moved to an area near the shoulder surface greatly beneficial to heat radiation from space among the belt plies or end areas on two sides, and the mass loss problems such as early shoulder separation, crown separation, separation, crown burst and the like which usually occur easily during use of a tire adopting the radial tire structure can be effectively solved.

Description

technical field [0001] The invention relates to a radial tire with belt working layer cords arranged at 90 degrees along the circumferential direction, and belongs to the technical field of radial tires. Background technique [0002] Carcass ply, steel rings and belt layers constitute the basic skeleton of a radial tire. At present, except for very few special-purpose radial tires that use fiber materials to make the belt layer, most of them are made of steel cords, including semi-steel radial tires and all-steel radial tires, regardless of their size. Several layers of steel wire belt layers, when the angle of the radial carcass is regarded as 0 degrees, the angle of each belt layer is between 25 and 85 degrees, especially when the tire is inflated, more than 70% of the circumferential force borne by the belt is caused by the angle It is borne by the working layer of 65 degrees to 75 degrees; some belt structures are arranged with a 90-degree steel wire belt layer, or a 90...

AI Technical Summary

Problems solved by technology

The belt structure with crossed angles will cause shear strain between the layers when the tire is running, especially the rubber parts between the edges of the two working layers have a large shear stress and strain range, high heat generation, difficulty in heat dissipation, and a decline in the mechanical properties of the rubber material. , often prone to belt delamination and shoulder voids, resulting in early quality damage to the tire

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