All-terrain vehicle tire with improved dynamic balance performance

Abstract

The present application relates to the technical field of all-terrain vehicle tires, and in particular to an all-terrain vehicle tire with improved dynamic balance performance. An all-terrain vehicle tire with improved dynamic balance performance, the tire comprises a tire body, an air retention layer located inside the tire body, a cord layer located outside the air retention layer, and a buffer layer located radially outside the cord layer; the tire body comprises a crown portion, shoulder portions located on both sides of the crown portion, a sidewall portion below the two shoulder portions, and a tire lip portion, the two ends of the cord layer respectively bypass the tire lip portion and roll outward, and the tire lip portion is provided with a wire ring; the tire crown is composed of two treads overlapped by an inclined plane, and the tread joints of the two treads themselves are in a 170-190 degree symmetrical state in the tire circumferential direction. The tire can effectively improve the dynamic balance performance of all-terrain vehicle tires while maintaining the manufacturing cost unchanged.

Description

Technical Field

[0001] The present application relates to the technical field of all-terrain vehicle tires, and in particular to an all-terrain vehicle tire with improved dynamic balance performance. Background Art

[0002] At present, all-terrain vehicles are often used as a conventional recreational vehicle due to their wide range of terrains. In addition to being used in recreational and leisure occasions, more and more consumers use them for carrying work, which puts forward new requirements for the dynamic balance performance of all-terrain vehicle tires. However, in order to ensure good passing performance and puncture resistance, the tire blocks of all-terrain vehicle tires are generally large and deep, and have strong independence, which is particularly unfavorable for dynamic balance performance. At present, automobile tires generally use heavy lead blocks hung on both sides of the steel rim to balance them. At present, there is no effective way to improve all-terrain vehicle tires. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the purpose of the present application is to provide an all-terrain vehicle tire with improved dynamic balance performance, which can effectively improve the dynamic balance performance of the all-terrain vehicle tire while maintaining the manufacturing cost unchanged.

[0004] To achieve the above objectives, the solution of this application is:

[0005] A tire for an all-terrain vehicle with improved dynamic balance performance, the tire comprising a tire body, an air retention layer located inside the tire body, a cord layer located outside the air retention layer, and a buffer layer located radially outside the cord layer; the tire body comprises a crown portion, shoulder portions located on both sides of the crown portion, a sidewall portion below the two shoulder portions, and a tire lip portion, the two ends of the cord layer respectively pass around the tire lip portion and roll outward, and the tire lip portion is provided with a wire ring; the tire crown is composed of two treads overlapped by an inclined plane, and the tread joints of the two treads themselves are in a 170-190 degree symmetrical state in the tire circumferential direction.

[0006] Preferably, the two treads have the same cross-sectional shape and the same rubber material, so that the two treads are extruded from the same die.

[0007] Since the circumference of the first tread increases after being attached to the forming drum, it is preferred that the length of the second tread differs from that of the first tread by 20 to 60 mm.

[0008] To ensure the appearance quality of the tire, it is preferred that the thickness of the tail end of the two treads overlapping at the crown portion is 1 to 3 mm, which can reduce the occurrence of rubber deficiency defects at the overlapping portion.

[0009] To ensure the overlap slope of the two treads and avoid excessive tire deflection due to excessive or insufficient slope, preferably, the distance between the tail end of the overlap of the two treads at the crown and the shoulder is 10 to 80 mm.

[0010] After adopting the above technical solution, the present application adopts the tread structure of the inclined overlap, and the tread joints of the two treads are in a 170-190 degree symmetrical state in the tire circumferential direction, which can achieve the following effects:

[0011] 1. When the present invention is used at high speed (≥80km / h), the centrifugal forces generated by the tread joints of the two treads can offset each other for the most part, thereby effectively improving the dynamic balance performance of the tire, and the degree of bouncing and shaking during driving is significantly reduced.

[0012] 2. The tires produced by this new experimental method are subjected to indoor durability tests (the test standard is the European ECE standard) and can meet regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the tire carcass structure of the all-terrain vehicle in this application. DETAILED DESCRIPTION

[0014] The following is an explanation of the implementation of the present application in conjunction with the accompanying drawings:

[0015] like Figure 1 As shown, an all-terrain vehicle tire carcass structure of the present application includes: 7

[0016] A tire body, at least one air retention layer 2 located inside the tire body, at least two carcass layers 3 and 4 located outside the air retention layer 2, and at least one buffer layer 5 located radially outside the carcass layer 4. The tire body includes a crown portion 6, shoulder portions 7 located on both sides of the crown portion 6, a sidewall portion 8 below the two shoulder portions 7, and a tread lip portion 1. The two ends of the carcass layers 3 and 4 respectively go around the tread lip portion 1 and roll outward. The crown portion 6 is composed of two treads 10 and 11 that are mitered.

[0017] The tread joints of the two treads 10 and 11 are symmetrical at 170 to 190 degrees in the circumferential direction of the tire. The two treads are extruded from the same die. The cross-sectional shapes of the two treads are the same, and the rubber is the same. The length of the second tread differs from that of the first tread by 40 mm. The thickness of the tail end of the overlap at the crown is 2 mm, which can reduce the occurrence of rubber deficiency defects at the overlap. At the same time, in order to ensure the slope of the overlap of the two treads and avoid excessive tire bending due to excessive or insufficient slope, it is preferred that the distance between the tail end of the overlap of the two treads at the crown and the shoulder is 50 mm.

[0018] Through the dynamic balance test results and durability performance test, it can be confirmed that after adopting the design of the present application, it can ensure that the tire can provide good comfort when driving at high speed (≥80km / h) while meeting the tire durability performance.

[0019] Twenty tires (of the same specification) produced by the present invention and the common structure were randomly selected and tested by a dynamic balancing tester. The results are as follows:

[0020]

[0021]

[0022] It can be seen that the static unbalance of the tire produced by the method of the present application is 90.5 grams, which is nearly 70 grams lower than the 160.2 grams of the ordinary structure, and the Cp (process precision) is improved from the original 0.43 to the current 0.77.

[0023] The above is a description of the embodiments of the present application. Through the above description of the disclosed embodiments, professionals and technicians in this field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in this field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novelties disclosed herein.

Claims

1. An all-terrain vehicle tire with improved dynamic balance performance, the tire comprising a tire body, an air retention layer (2) located inside the tire body, a cord layer (3, 4) located outside the air retention layer (2), and a buffer layer (5) located radially outside the cord layer (3, 4); the tire body comprises a crown portion (6), shoulder portions (7) located on both sides of the crown portion (6), a sidewall portion (8) below the two shoulder portions (7), and a tread bead portion (1), the two ends of the cord layer (3, 4) respectively bypass the tread bead portion (1) and roll outward, and the tread bead portion (1) is provided with a wire ring (9); the characteristics are as follows: The crown portion (6) is composed of two treads (10, 11) overlapped by an inclined plane, and the tread joints of the two treads (10, 11) are in a 170-190 degree symmetrical state in the tire circumferential direction.

2. The all-terrain vehicle tire with improved dynamic balance performance according to claim 1, characterized in that: The two treads (10, 11) have the same cross-sectional shape.

3. The all-terrain vehicle tire with improved dynamic balance performance according to claim 1, characterized in that: The length difference between the two treads (10, 11) is 20 to 60 mm.

4. The all-terrain vehicle tire with improved dynamic balance performance according to claim 1, characterized in that: The thickness of the tail ends of the two treads (10, 11) overlapping each other at the crown portion (6) is 1 to 3 mm.

5. The all-terrain vehicle tire with improved dynamic balance performance according to claim 1, characterized in that: The distance between the tail ends of the two treads (10, 11) overlapping at the crown portion (6) and the shoulder portion is 10 to 80 mm.

6. The all-terrain vehicle tire with improved dynamic balance performance according to claim 1, characterized in that: The rubber material of the two treads (10, 11) is the same.

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