A radial tire belt layer separation structure

Abstract

The present invention relates to a radial tire belt layer separation structure, which includes a cord layer, a belt layer and a tread portion from the inside to the outside, and the belt layer is a multi-layer structure; the characteristic is that: a reinforcing belt layer is also sandwiched in the belt layer, and the reinforcing belt layer is composed of three separated narrow belt strips and two narrow rubber strips spliced ​​between the three narrow belt strips; the three narrow belt strips are respectively two side narrow belt strips and a middle narrow belt strip. The present invention ingeniously uses three separated narrow belt strips and two narrow rubber strips to splice to form a reinforcing narrow belt layer structure, especially the middle narrow belt is embedded with a high-elongation steel cord, which can effectively disperse the force in the middle of the crown, reduce the occurrence of peeling in the middle of the crown, and improve the service life of the tire.

Description

Technical field:

[0001] The invention belongs to the field of tire manufacturing, and in particular relates to a radial tire belt layer separation structure, which is particularly suitable for application in giant engineering tire manufacturing. Background technology:

[0002] The crown of a giant tire for mining engineering is a very important area. The belt layer bears about 70% of the total internal stress and various stresses from vehicles, roads, steering, transmission, etc. During the operation of the tire, the crown and the road will frequently impact, and the crown will frequently deform. Due to the particularity of the structure of the giant radial tire, the center area of ​​the tire tread will bear greater stress and deformation than the shoulders on both sides during use, resulting in early peeling in the center area of ​​the crown, greatly shortening the service life of the tire. Therefore, a solution that can effectively disperse the crown stress is invented, which becomes the object of research of the present invention. Summary of the invention:

[0003] The purpose of the present invention is to design a radial tire belt layer separation structure with a reinforcement belt layer at the center of the crown.

[0004] The technical solution of the present invention is implemented as follows: a radial tire belt layer separation structure, including a cord layer, a belt layer and a tread portion from the inside to the outside, and the belt layer is a multi-layer structure; it is characterized in that: a reinforcing belt layer is also sandwiched in the belt layer, and the reinforcing belt layer is composed of three separated narrow belt strips and two narrow rubber strips spliced ​​between the three narrow belt strips; the three narrow belt strips are respectively two side narrow belt strips and a middle narrow belt strip.

[0005] The three narrow belt strips and two narrow rubber strips in the reinforced belt layer account for the following proportions of the total width: the middle narrow belt strip is 25%, the narrow belt strips on both sides are of equal width and are 35%, and the two narrow rubber strips are of equal width and are 5%; the thickness of the narrow rubber strip is 1.05 to 1.08 times the thickness of the narrow belt strip.

[0006] The middle narrow belt strip is embedded with high-elongation steel cords.

[0007] Furthermore, a total of six belt layers are designed from the inside to the outside, and the reinforcing belt layer is at the fourth layer.

[0008] The present invention cleverly uses three separated narrow belt strips and two narrow rubber strips to form a reinforced narrow belt layer structure. In particular, the middle narrow belt is embedded with high-elongation steel cords, which can effectively disperse the force on the middle part of the crown, reduce the occurrence of peeling in the middle part of the crown, and increase the service life of the tire. Description of the drawings:

[0009] The present invention will be further described below in conjunction with specific illustrations:

[0010] Figure 1 Schematic diagram of a partial cross section of a tire

[0011] Figure 2 Schematic diagram of belt layer distribution

[0012] in

[0013] 1-cord layer 2-belt layer 3-tread layer

[0014] 4—reinforced belt layer 41—middle narrow belt strip 42—narrow belt strips on both sides

[0015] 43—Narrow rubber strip A—Crown part B—Shoulder part Specific implementation method:

[0016] Reference Figure 1 and Figure 2 The radial tire has a belt layer separation structure, which includes a cord layer 1, a belt layer 2 and a tread portion 3 from the inside to the outside. The tread portion 3 is the area in contact with the road surface, among which the crown portion A in the middle is the most frequent, and the shoulder portions B on both sides are second.

[0017] The belt layer 3 is a multi-layer structure, with a total of six layers designed from the inside to the outside. The reinforced belt layer 4 is in the fourth layer. The reinforced belt layer 4 is composed of three separated narrow belt strips, namely a middle narrow belt strip 41 and two side narrow belt strips 42, and two narrow rubber strips 43 used to splice the three narrow belt strips; the three narrow belt strips and the two narrow rubber strips account for the total width ratios: the middle narrow belt strip 41 is 25%, the two side narrow belt strips 42 are equal in width and are both 35%, and the two narrow rubber strips 43 are equal in width and are both 5%; the thickness of the narrow rubber strip 43 is 1.05 to 1.08 times the thickness of the narrow belt strip.

[0018] Furthermore, a high-elongation steel cord is embedded in the middle narrow belt strip 41. Specifically, the rubber material and the steel cord are extruded simultaneously and cut into belt strips of a certain width according to the corresponding tire specification requirements by using a belt layer extrusion, cutting and joining integrated machine.

Claims

1. A radial tire belt layer separation structure, comprising a cord layer, a belt layer and a tread portion from the inside to the outside, wherein the belt layer is a multi-layer structure; characterized in that: A reinforcing belt layer is also sandwiched in the belt layer, which is composed of three separated narrow belt strips and two narrow rubber strips spliced ​​between the three narrow belt strips; the three narrow belt strips are respectively the narrow belt strips on both sides and the middle narrow belt strip, wherein the middle narrow belt strip is embedded with high-elongation steel cords; the three narrow belt strips and two narrow rubber strips in the strong belt layer account for the total width ratios respectively: the middle narrow belt strip is 25%, the widths of the narrow belt strips on both sides are equal and both are 35%, and the widths of the two narrow rubber strips are equal and both are 5%; the thickness of the narrow rubber strip is 1.05 to 1.08 times the thickness of the narrow belt strip; the belt layer is designed with a total of six layers from the inside to the outside, and the reinforcing belt layer is at the fourth layer.

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