Radial tire

Abstract

The invention relates to the field of tires, in particular to a radial tire which comprises apex, a reinforcing layer, a steel wire ring and seam allowance protection rubber. The reinforcing layer wraps the apex; the steel wire ring is arranged in the apex; the seam allowance protection rubber wraps the outer side of the reinforcing layer, and the seam allowance protection rubber is connected with the lining rubber after bypassing the steel wire ring; wherein the apex has a first height h1 in the circumferential direction of the tire, h1 = tire section height SH * a first coefficient a, and the value range of the first coefficient a is 0.18-0.32. The first height h1 of the apex in the circumferential direction of the tire is designed, and the value range of the first coefficient a is limited to be adjustable, so that the parameter of the first height h1 of the apex is adjustable, and the ring failure performance of the radial tire in a high-speed performance test at the inclination angle of-3 degrees can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of semi-steel radial tires, in particular to a radial tire. Background Art

[0002] Usually, the failure modes of -3° inclination angle high-speed performance test are shoulder failure and bead failure. When the failure mode is the bead area, the -3° inclination angle high-speed performance needs to be improved. The -3° inclination angle high-speed test better simulates the high-speed driving ability of tires under actual vehicle conditions, and is one of the important indicators for measuring vehicle safety performance. Now OEMs are gradually increasing the requirements and control of this test item. Existing technology can pass conventional high-speed tests smoothly, but it is difficult to meet the market requirements of inclination angle high speed.

[0003] Therefore, how to design the key parameters of the bead area of ​​radial tires to improve the bead failure performance in the -3° inclination angle high-speed performance test is a problem that radial tires need to solve. Summary of the invention

[0004] The present invention provides a radial tire, which is used to solve the problem of how to adjust the design parameters of the tire bead portion to improve the bead portion failure performance in a -3° inclination angle high-speed performance test.

[0005] In one aspect, the present invention provides a radial tire, comprising:

[0006] Triangle glue;

[0007] The reinforcement layer is wrapped around the outside of the apex;

[0008] The wire ring is located inside the apex;

[0009] The rubber guard at the mouth is wrapped around the outside of the reinforcement layer, and the rubber guard at the mouth passes around the wire ring and connects to the lining rubber;

[0010] The apex rubber has a first height h1 along the circumferential direction of the tire, where h1=tire section height SH*first coefficient a, and the value range of the first coefficient a is 0.18-0.32.

[0011] In some of the embodiments, a waterproof platform is provided at the connection between the lining rubber and the sub-mouth protective rubber; there is a first distance △1 between the upper end point of the sub-mouth protective rubber and the waterproof platform, and the first distance △1 satisfies: 20mm≤△1≤35mm.

[0012] In some embodiments, the rubber cap has a first position g1, and the rubber cap has a first thickness w1 perpendicular to the circumferential direction of the tire at the first position g1, and the first thickness w1 satisfies: 1.5 mm≤w1≤4 mm.

[0013] In some embodiments, the rubber cap further includes a second position g2, and the rubber cap has a second thickness w2 perpendicular to the circumferential direction of the tire at the second position g2, and the first thickness w1 and the second thickness w2 satisfy: w1<w2.

[0014] In some embodiments, the sub-edge protection rubber further includes a third position, and the sub-edge protection rubber has a third thickness w3 perpendicular to the circumferential direction of the tire at the third position, and the first thickness w1, the second thickness w2 and the third thickness w3 satisfy: w1<w2, and w3<w2; wherein,

[0015] The third position is other positions of the sub-mouth protective glue excluding the first position g1 and the second position g2.

[0016] In some embodiments, the reinforcing layer has a first width w1 along the circumferential direction of the tire, and the first width w1 is in the range of 30 mm to 50 mm.

[0017] In some of the embodiments, there is a second distance △2 between the lower end point of the reinforcement layer and the top of the wire ring, and the second distance △2 satisfies: 0≤△2≤5mm.

[0018] In some of the embodiments, along the circumferential direction of the tire, the upper end of the reinforcement layer is higher than the upper end of the apex; there is a third distance △3 along the circumferential direction of the tire between the upper end point of the reinforcement layer and the upper end point of the apex, and the third distance △3 satisfies: △3≥5mm.

[0019] In some of the embodiments, the breaking strength of the reinforcement layer ranges from 90N to 150N;

[0020] and / or, the diameter of the single filament of the reinforcement layer ranges from 0.1 mm to 0.4 mm;

[0021] And / or, the rubber coating thickness of the reinforcement layer in a direction perpendicular to the circumferential direction of the tire is in a range of 0.6 mm to 1.3 mm.

[0022] In some embodiments, the Shore A hardness of the nozzle protection glue ranges from 65 to 75.

[0023] The beneficial effects of the present invention are as follows: the radial tire of the present invention comprises: an apex rubber, a reinforcement layer, a wire ring and a bead protection rubber; the reinforcement layer is wrapped on the outside of the apex rubber; the wire ring is arranged inside the apex rubber; the bead protection rubber is wrapped on the outside of the reinforcement layer; the bead protection rubber is connected to the inner lining rubber after bypassing the wire ring; wherein the apex rubber has a first height h1 along the circumference of the tire, h1=tire section height SH*first coefficient a, wherein the value range of the first coefficient a is 0.18-0.32. The radial tire of the present invention designs the first height h1 of the apex rubber along the circumference of the tire, and limits the value range of the first coefficient a to be adjustable, so that the first height h1 parameter of the apex rubber is adjustable, which helps to improve the failure performance of the radial tire in the ring part of the high-speed performance test at a -3° inclination angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial structural schematic diagram of a radial tire in an embodiment of the present application.

[0025] In the figure: 1. Triangle glue; 2. Sub-mouth protective glue; 3. Reinforcement layer; 4. Waterproof platform; 5. Wire ring; 7-Inner lining glue. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] As mentioned in the background technology, the failure modes of the -3° inclination high-speed performance test are usually shoulder failure and bead failure. When the failure mode is the bead part, it is necessary to improve the -3° inclination high-speed performance; the -3° inclination high-speed test better simulates the high-speed driving ability of the tire under actual vehicle conditions, which is one of the important indicators for measuring the safety performance of the vehicle. The main engine manufacturers are now gradually increasing the requirements and control of this test item; the existing technology can smoothly pass the conventional high-speed test, but it is difficult to meet the market requirements for inclination high speed. Therefore, how to design the key parameters of the bead part of the radial tire to improve the -3° inclination high-speed performance test bead failure performance is a problem that the current radial tire needs to solve.

[0028] To solve the above problems, refer to Figure 1The present invention provides a radial tire, in particular, a pneumatic radial tire for improving the failure of the bead at a high-speed performance at a -3° inclination angle, comprising: an apex rubber 1, a bead protection rubber 2, a reinforcement layer 3, a wire ring 5 and an inner liner rubber 7. The reinforcement layer 3 is wrapped around the outside of the apex rubber 1; the wire ring 5 is arranged inside the apex rubber 1; the bead protection rubber 2 is wrapped around the outside of the reinforcement layer 3, and the bead protection rubber 2 is connected to the inner liner rubber 7 after bypassing the wire ring 5; and the apex rubber 1 has a first height h1 along the circumferential direction of the tire, h1 = tire section height SH * first coefficient a, wherein the value range of the first coefficient a is 0.18 to 0.32, and the tire section height SH specifically refers to the vertical distance from the bottom of the tire bead to the highest point of the tread, and the tire section height SH is a fixed value. In addition, it should be noted that the circumferential direction of the tire is the rolling direction of the radial tire.

[0029] The radial tire provided by the present invention designs the first height h1 of the apex rubber 1 along the tire circumference, and defines the first height h1=tire section height SH*first coefficient a, wherein the value range of the first coefficient a is 0.18-0.32, so that the first height h1 of the apex rubber 1 is adjustable, which helps to improve the failure performance of the radial tire in the -3° inclination angle high-speed performance test ring. It should be noted that the smaller the value of the first height h1, the more positive improvement effect it has on the inclination angle high-speed ring failure form.

[0030] In addition, the radial tire of the present invention further comprises a carcass ply, which is wrapped around the outside of the apex rubber 1 , and a reinforcing layer 3 is arranged on a side surface of the carcass ply located outside the bead structure and away from the apex rubber 1 .

[0031] In some embodiments, such as Figure 1 As shown, a waterproof platform 4 is provided at the connection between the lining rubber 7 and the sub-mouth protective rubber 2. The waterproof platform 4 is specifically a rim waterproof platform. The design principle of the waterproof platform 4 is that the thickness curve of the sub-mouth protective rubber 2 has a uniform and smooth transition and gradually becomes thinner. After thinning, the curve is relatively smooth, which is conducive to stress dispersion. There is a first distance △1 between the upper end point of the sub-mouth protective rubber 2 and the waterproof platform 4 after curing. The first distance △1 satisfies: 20mm≤△1≤35mm. Therefore, by adjusting the first distance △1 between the upper end point of the sub-mouth protective rubber 2 and the waterproof platform 4, it is helpful to improve the rim failure performance of the radial tire in the -3° inclination high-speed performance test.

[0032] In some of the embodiments, the rubber cap 2 is distributed along the circumference of the tire, and the Shore A hardness of the rubber cap 2 is in the range of 65 to 75, wherein the Shore hardness of the rubber material of the rubber cap 2 is specifically the hardness after vulcanization and curing, and the larger the Shore hardness value, the higher the hardness of the rubber cap 2.

[0033] In some embodiments, the sub-mouth protective rubber 2 has a first position g1, and the sub-mouth protective rubber 2 has a first thickness w1 perpendicular to the circumference of the tire at the first position g1, and the first thickness w1 satisfies: 1.5mm≤w1≤4mm. It should be noted that the first position g1 of the sub-mouth protective rubber 2 is located at the lower section of the sub-mouth protective rubber 2, and the first position g1 is correspondingly set at the position where the sub-mouth protective rubber 2 is attached to the reinforcing layer 3, and the first position g1 corresponds to the position of the sub-mouth protective rubber 2 with a smaller thickness.

[0034] In some embodiments, the rubber cap 2 also has a second position g2, and the rubber cap 2 has a second thickness w2 perpendicular to the circumference of the tire at the second position g2, and the first thickness w1 and the second thickness w2 satisfy: w1<w2; it should be noted that the second position g2 of the rubber cap 2 is located in the middle section of the rubber cap 2, and the second position g2 is set corresponding to the position where the rubber cap 2 is attached to the reinforcing layer 3, and the second position g2 corresponds to the maximum thickness position of the rubber cap 2. In addition, the smaller the second thickness w2 of the rubber cap 2 at the second position g2, the more positive improvement effect it has on the damage form of the high-speed bead portion of the inclined angle.

[0035] In some embodiments, the rubber cap 2 also has a third position, and the rubber cap 2 has a third thickness w3 perpendicular to the circumference of the tire at the third position, and the first thickness w1, the second thickness w2 and the third thickness w3 satisfy: w1<w2, and w3<w2; wherein the third position is the other position of the rubber cap 2 after excluding the first position g1 and the second position g2. Thus, by adjusting the first thickness w1, the second thickness w2 and the third thickness w3, it is helpful to improve the rim failure performance of the radial tire in the -3° inclination high-speed performance test.

[0036] In some embodiments, the reinforcing layer 3 is extended and distributed along the circumference of the tire, and the reinforcing layer 3 is wrapped around the outside of the apex 1. Furthermore, the reinforcing layer 3 is arranged between the carcass cord layer and the bead protection rubber 2, and the two sides of the reinforcing layer 3 are respectively attached to the carcass cord layer and the bead protection rubber 2. The reinforcing layer 3 has a first width w1 along the circumference of the tire, and the value range of the first width w1 is 30mm to 50mm. Therefore, by adjusting the first width w1 within the range of 30mm to 50mm, it is helpful to improve the rim failure performance of the radial tire in the -3° inclination high-speed performance test.

[0037] In some embodiments, there is a second distance Δ2 between the lower end of the reinforcing layer 3 and the top of the wire ring 5, and the second distance Δ2 satisfies: 0≤Δ2≤5mm. Figure 1 As shown, the second distance △2 is specifically the distance in the vertical direction between the reinforcing layer 3 and the bead ring 5. Therefore, by adjusting the second distance △2 between the lower end point of the reinforcing layer 3 and the top of the bead ring 5, it is helpful to improve the failure performance of the radial tire in the high-speed performance test at a -3° inclination angle.

[0038] In some embodiments, along the circumferential direction of the tire, the upper end of the reinforcing layer 3 is higher than the upper end of the apex 1; and there is a third distance △3 along the circumferential direction of the tire between the upper end point of the reinforcing layer 3 and the upper end point of the apex 1, and the third distance △3 satisfies: △3 ≥ 5mm. Therefore, by adjusting the third distance △3 between the upper end point of the reinforcing layer 3 and the upper end point of the apex 1, it is helpful to improve the rim failure performance of the radial tire in the -3° inclination high-speed performance test.

[0039] In some embodiments, the breaking strength of the reinforcing layer 3 is in the range of 90N to 150N. And / or, in other embodiments, the monofilament diameter of the reinforcing layer 3 is in the range of 0.4mm to 0.1mm. And / or, in other embodiments, the rubber coating thickness of the reinforcing layer 3 in the vertical direction along the tire circumference is in the range of 0.6mm to 1.3mm. By adjusting the breaking strength, monofilament diameter, and rubber coating thickness of the reinforcing layer 3, it is helpful to improve the rim failure performance of the radial tire in the -3° inclination high-speed performance test.

[0040] It should be added that the radial tire of the present invention is tested with a 205 / 60R16 tire specification to improve the damage of the high-speed bead portion at a -3° inclination angle. At the same time, by improving the first height h1 of the apex rubber 1, the first distance △1 between the upper end point of the sub-mouth protective rubber 2 and the waterproof platform 4, the first thickness w1, the second thickness w2, the third thickness w3 of the sub-mouth protective rubber 2, the first width w1 of the reinforcing layer 3, the second distance △2 between the lower end point of the reinforcing layer 3 and the top of the wire ring 5, and the third distance △3 between the upper end point of the reinforcing layer 3 and the upper end point of the apex rubber 1, the multiple speed levels of the radial tire of the present invention can be improved.

[0041] Therefore, the radial tire of the present invention comprises: an apex rubber 1, a reinforcement layer 3, a wire ring 5 and a rubber cap 2; the reinforcement layer 3 is wrapped around the outside of the apex rubber 1; the wire ring 5 is arranged inside the apex rubber 1; the rubber cap 2 is wrapped around the outside of the reinforcement layer 3; the rubber cap 2 is connected to the inner lining rubber 7 after passing around the wire ring 5; wherein the apex rubber 1 has a first height h1 along the circumference of the tire, h1=tire section height SH*first coefficient a, wherein the value range of the first coefficient a is 0.18~0.32. The radial tire of the present invention designs the first height h1 of the apex rubber 1 along the circumference of the tire and limits the adjustable value range of the first coefficient a, so that the first height h1 parameter of the apex rubber 1 is adjustable; and, in the radial tire of the present invention, the first distance △1 between the upper end point of the sub-mouth protective rubber 2 and the waterproof platform 4 is adjustable between 20mm and 35mm, the first thickness w1 of the sub-mouth protective rubber 2 at the first position g1 is adjustable between 1.5mm and 4mm, and the first thickness w1 of the sub-mouth protective rubber 2, the second thickness w2 of the sub-mouth protective rubber 2 and the third thickness w3 of the sub-mouth protective rubber 2 satisfy: w1<w2, and w3<w2, and the first thickness w1, the second thickness w2 and the third thickness w3 are all adjustable. Therefore, the radial tire of the present invention can improve the failure performance of the radial tire in the bead portion of the high-speed performance test at -3° inclination by adjusting the height design parameter of the apex rubber 1, i.e., the first height h1, the thickness parameters of the bead protection rubber 2, i.e., the first thickness w1, the second thickness w2, and the third thickness w3, the distance parameter between the bead protection rubber 2 and the waterproof platform 4, i.e., the first distance △1, the width parameter of the reinforcing layer 3, i.e., the first width w1, the setting position of the reinforcing layer 3, etc. Therefore, the radial tire of the present invention can improve the failure performance of the bead portion of the high-speed performance test at -3° inclination by adjusting the key parameters of the bead portion of the radial tire.

[0042] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "above" and "below" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "above" and "below" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A radial tire, characterized in that: include: Apex (1); A reinforcing layer (3) wrapped around the outside of the apex (1); A wire ring (5) is arranged inside the apex (1); The spout protective rubber (2) is wrapped around the outer side of the reinforcing layer (3), and the spout protective rubber (2) is connected to the lining rubber (7) after passing through the wire ring (5); wherein: The apex rubber (1) has a first height h1 along the circumferential direction of the tire, where h1=tire section height SH*first coefficient a, and the value range of the first coefficient a is 0.18-0.

32.

2. The radial tire according to claim 1, characterized in that: A waterproof platform (4) is provided at the connection between the inner lining rubber (7) and the sub-mouth protective rubber (2); a first distance △1 is provided between the upper end point of the sub-mouth protective rubber (2) and the waterproof platform (4), and the first distance △1 satisfies: 20mm≤△1≤35mm.

3. The radial tire according to claim 1, characterized in that: The sub-edge protection rubber (2) has a first position g1, and the sub-edge protection rubber (2) has a first thickness w1 perpendicular to the circumferential direction of the tire at the first position g1, and the first thickness w1 satisfies: 1.5mm≤w1≤4mm.

4. The radial tire according to claim 3, characterized in that: The sub-edge protection rubber (2) further comprises a second position g2, and the sub-edge protection rubber (2) has a second thickness w2 perpendicular to the circumferential direction of the tire at the second position g2, and the first thickness w1 and the second thickness w2 satisfy: w1<w2.

5. The radial tire according to claim 4, characterized in that: The sub-edge protection rubber (2) further includes a third position, and the sub-edge protection rubber (2) has a third thickness w3 perpendicular to the circumferential direction of the tire at the third position, and the first thickness w1, the second thickness w2 and the third thickness w3 satisfy: w1<w2, and w3<w2; wherein, The third position is another position of the sub-mouth protective glue (2) excluding the first position g1 and the second position g2.

6. The radial tire according to claim 1, characterized in that: The reinforcing layer (3) has a first width w1 along the circumferential direction of the tire, and the first width w1 satisfies: 30 mm ≤ w1 ≤ 50 mm.

7. The radial tire according to claim 1, characterized in that: There is a second distance Δ2 between the lower end point of the reinforcing layer (3) and the top of the wire ring (5), and the second distance Δ2 satisfies: 0≤Δ2≤5mm.

8. The radial tire according to claim 1, characterized in that: Along the circumferential direction of the tire, the upper end of the reinforcing layer (3) is higher than the upper end of the apex rubber (1); there is a third distance △3 along the circumferential direction of the tire between the upper end point of the reinforcing layer (3) and the upper end point of the apex rubber (1), and the third distance △3 satisfies: △3 ≥ 5 mm.

9. The radial tire according to claim 1, characterized in that: The breaking strength of the reinforcing layer (3) ranges from 90N to 150N; And / or, the diameter of the single filament of the reinforcing layer (3) ranges from 0.1 mm to 0.4 mm; And / or, the rubber coating thickness of the reinforcing layer (3) in a direction perpendicular to the circumference of the tire is in the range of 0.6 mm to 1.3 mm.

10. The radial tire according to claim 1, characterized in that: The Shore A hardness of the nozzle protective rubber (2) is in the range of 65 to 75.

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