Low-section tire structure

Abstract

The utility model provides a low-section tire structure, belongs to the technical field of tire structures, and solves the problems that the fitting degree of a tire and a rim is improved by reducing the diameter of a steel wire ring in the prior art, the fitting pressure of the tire is improved, the assembly difficulty of the tire and the rim is further improved, and the service life of the tire is prolonged. And for a low-section tire, the effect of improving the matching degree of the tire and a rim is not obvious. The low-section tire structure comprises a tire bead part, the tire bead part comprises apex which is arranged at the bottom of the tire bead part, and the height of the apex is 65% higher than that of the lower section of the tire; the bead ring is arranged at the bottom of the apex, the bead ring is formed by winding a plurality of single steel wires, the difference value between the diameter of the bead ring and the sum diameter of the corresponding tire mold is smaller than 5 mm, and the number of the steel wires arranged on the lowest layer of the bead ring is larger than 4. According to the utility model, the matching degree of the low-section tire and the rim can be improved, so that the low-section tire has higher knocking-over resistance, and the tire and the rim are easy to assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire structures, and in particular relates to a low-section tire structure. Background Art

[0002] Tires not only bear the weight of the vehicle but also continuously generate friction with the road during driving, transmitting traction and braking force to ensure stable and safe driving. Therefore, tire performance is directly related to vehicle safety and passenger comfort. As the key component connecting the tire to the vehicle, the fit of the tire to the rim directly affects tire performance and service life. If the fit between the tire and the rim is insufficient, the tire may fall off during driving, which not only endangers driving safety but also threatens the lives of the driver and passengers. Low-profile tires, in particular, often travel at higher speeds, and therefore have higher requirements for tire-rim fit than standard tires.

[0003] Currently, to address the problem of bead unseating caused by insufficient tire-rim fit, a commonly used technical solution is to improve tire-rim fit by reducing the bead ring's diameter. However, while simply reducing the bead ring's diameter can improve tire-rim fit to a certain extent for high-profile tires, the effect of improving tire-rim fit is less pronounced for low-profile tires. Furthermore, simply reducing the bead ring's diameter to improve tire-rim fit often increases tire contact pressure, further increasing the difficulty of tire-rim assembly.

[0004] Therefore, it is necessary to provide a low-profile tire structure that improves the fit between the tire and the rim. Utility Model Content

[0005] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0006] The present invention proposes a low-profile tire structure that solves the technical problems of the prior art, which employs a method of reducing the diameter of the wire bead to improve the fit between the tire and the rim, increasing the tire's contact pressure, thereby increasing the difficulty of assembling the tire and the rim, and having a limited effect on improving the fit between the tire and the rim. The low-profile tire structure provided by the present invention can improve the fit between the low-profile tire and the rim, providing the low-profile tire with higher bead unseating resistance, maintaining a stable fit between the tire and the rim under various road conditions and driving speeds, and providing good transmission efficiency and driving stability. Furthermore, the tire and rim are easy to assemble.

[0007] The present invention discloses a low-profile tire structure, comprising a bead portion, the bead portion including an apex rubber, the apex rubber being disposed at the bottom of the bead portion, the apex rubber being higher than 65% of the height of the tire's lower section; and a wire bead, the wire bead being disposed at the bottom of the apex rubber and being formed by winding a plurality of single steel wires, the difference between the diameter of the wire bead and the diameter of the corresponding tire mold being less than 5 mm, and the number of steel wires arranged in the lowest layer of the wire bead being greater than 4. The present invention increases the thickness of the tire sidewall at the apex rubber portion by increasing the height of the apex rubber portion, thereby increasing the rigidity of the tire's lower sidewall portion, effectively reducing the displacement of the stress point during tire movement, thereby improving the fit between the tire and the rim, and achieving the effect of increasing the tire's unseating resistance. The present invention reduces the inner diameter of the wire bead, increases the number of wire bead rubber portions, and changes the winding method of the wire bead rubber portions, thereby making it easier for the tire to clamp tightly to the rim, thereby improving the fit between the tire and the rim, and achieving the effect of increasing the tire's unseating resistance.

[0008] In some embodiments, the height of the upper end point of the apex is 70% to 80% of the height of the lower section of the tire. The upper end point height of the apex of the utility model within this range can better improve the tire's bead unseating resistance.

[0009] In some embodiments, the height of the apex is 30 mm to 35 mm.

[0010] In some embodiments, the height of the apex is 35 mm.

[0011] In some embodiments, the bead ring is wound in a 5-6-5-4 or 4-5-6-5-4 manner. The bead ring of the utility model adopts the above-mentioned winding manner, which can significantly improve the fit between the tire and the rim.

[0012] In some embodiments, the diameter of a single steel wire of the wire ring is 1.1 mm to 1.3 mm.

[0013] In some embodiments, the diameter of a single steel wire of the wire ring is 1.2 mm.

[0014] In some embodiments, the low-profile tire structure further includes a sidewall portion, wherein the thickness of the sidewall portion at the horizontal axis of the cross-section is 4 mm to 6 mm. By increasing the thickness of the sidewall portion, the present invention can improve the overall rigidity and stability of the tire, thereby further improving the fit between the tire and the rim, thereby achieving the effect of increasing the tire's bead unseating resistance.

[0015] In some embodiments, the sidewall thickness at the rim protection position is 12 mm to 15 mm, and the sidewall thickness at the tire bead position is 11 mm to 14 mm.

[0016] In some embodiments, the bead ring has a diameter of 467 mm, a 5-6-5-4 winding pattern, a 35 mm height, and a 6 mm thickness for the sidewall outer rubber. This low-profile tire structure employs the aforementioned structure, resulting in high bead unseating resistance, the ability to maintain a stable fit under various road conditions and driving speeds, and excellent transmission efficiency and driving stability. Practical application has demonstrated that this tire exhibits excellent performance and safety under both high-speed driving and complex road conditions.

[0017] Compared with the prior art, the low-profile tire structure provided by the present invention has the following beneficial effects:

[0018] The low-profile tire structure of the utility model effectively improves the fit between the tire and the rim by adjusting the diameter of the wire ring, the arrangement of the wire ring, the height of the apex rubber and the thickness of the sidewall.

[0019] The low-profile tire structure of the utility model can increase the thickness of the sidewall at the bead of the tire by increasing the height of the apex rubber, thereby increasing the rigidity of the lower sidewall, effectively reducing the displacement of the stress point during the tire movement, and improving the fit between the tire and the rim;

[0020] The low-profile tire structure of the utility model can make it easier for the tire to clamp the rim tightly by reducing the inner diameter of the wire ring, increasing the number of wire rings and changing the winding method of the wire rings, thereby improving the fit between the tire and the rim;

[0021] The low-section tire structure of the utility model can improve the overall rigidity and stability of the tire by increasing the thickness of the sidewall portion, thereby further improving the fit between the tire and the rim. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of a low-profile tire structure provided by an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of a wire bead winding method for one embodiment of a low-profile tire structure provided by the present utility model;

[0025] Figure 3 A schematic diagram of a wire bead winding method for another embodiment of a low-profile tire structure provided by the present utility model;

[0026] In the accompanying drawings: 1, sidewall; 21, wire bead; 22, apex rubber. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be understood that the terms "center," "transverse," "longitudinal," "upper," "lower," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The term "bead diameter" generally refers to the diameter of the tire's bead bottom surface that fits the rim, and its size is the same as the diameter of the rim to which it is fitted.

[0029] The embodiment of the present utility model provides a low-section tire structure, which further improves the fit between the tire and the rim by adjusting the diameter of the wire ring, the arrangement of the wire ring, the height of the apex rubber and the thickness of the sidewall, so that the tire has a higher resistance to bead unseating and can maintain a stable fit under various road conditions and driving speeds. The tire and the rim will not slip during driving, and the driving force of the engine can be better transmitted to the tire, and then transmitted to the ground through the tire, thereby improving transmission efficiency and ensuring driving stability. Figure 1 Schematic diagram of a low-profile tire structure provided according to an embodiment of the present invention. Figure 1 As shown, the low-profile tire structure includes a bead portion, which includes an apex 22 disposed at the bottom of the bead portion and a bead ring 21 disposed at the bottom of the apex 22. The height of the apex 22 is greater than 65% of the height of the tire's lower section. The bead ring 21 is formed by winding multiple single steel wires. The difference between the diameter a of the bead ring 21 and the diameter b of the corresponding tire mold is less than 5 mm, i.e., ab < 5 mm. The number of steel wires arranged in the bottom layer of the bead ring 21 is greater than 4.

[0030] The low-profile tire structure of this utility model embodiment includes a rubber apex 22 positioned at the tire's bead. The upper endpoint of the rubber apex 22 is 70% to 80% of the tire's lower cross-sectional height. By increasing the height of the rubber apex 22 at the tire bead, the low-profile tire structure of this utility model can increase the thickness of the tire's sidewall at the bead, thereby increasing the rigidity of the tire's lower sidewall, effectively reducing the displacement of the stress points during tire movement, thereby improving the fit between the tire and the rim and achieving the purpose of increasing the tire's unseating resistance. In a preferred embodiment, the height of the rubber apex 22 is 30 mm to 35 mm, and more preferably, the height of the rubber apex 22 is 35 mm.

[0031] The diameter of a single steel wire of the bead ring 21 of the low-profile tire structure of the present utility model is 1.1 mm to 1.3 mm. In a preferred embodiment, the diameter of a single steel wire of the bead ring 21 is 1.2 mm. Figure 2 As shown, the winding pattern of the wire ring 21 is 4-5-6-5-4; Figure 3 As shown, the bead ring 21 is wound in a 5-6-5-4 pattern. Tire bead rings are typically shaped like a regular hexagon or an irregular hexagon, and their inner diameter is smaller than the nominal diameter of the rim. Compared to conventional tire designs, the low-profile tire structure of this utility model reduces the inner diameter of the bead ring, increases the number of bead rings, and changes the bead ring winding pattern. This allows the tire to more easily clamp to the rim, thereby improving the fit between the tire and the rim and increasing the tire's resistance to unseating.

[0032] The low-profile tire structure of this embodiment also includes a sidewall portion 1, wherein the thickness of the sidewall portion 1 at the horizontal axis is 4mm to 6mm. In a preferred embodiment, the overall thickness of the sidewall at the rim guard is 12mm to 15mm; the sidewall thickness at the rim is 11mm to 14mm. By increasing the thickness of the sidewall portion, the low-profile tire structure of this invention can improve the overall rigidity and stability of the tire, thereby further improving the fit between the tire and the rim and achieving increased resistance to bead unseating.

[0033] As a preferred embodiment of the present invention, the diameter of the wire ring 21 is 467 mm, the winding pattern of the wire ring 21 is 5-6-5-4, the height of the apex rubber 22 is 35 mm, and the thickness of the sidewall outer rubber is 6 mm.

[0034] Performance Testing

[0035] Bead unseating resistance refers to the force required to remove the bead of a tubeless tire from the bead seat of the rim. The higher the bead unseating resistance, the better the fit between the tire and the rim. The fit of the tire and rim of this utility model is measured using the bead unseating resistance test method in accordance with the GB / T 4502-2016 standard.

[0036] The embodiment of the present invention uses a 225 / 45R18 91W tire as an example for performance testing. The indoor test performance meets the requirements of the GB / T 4502-2016 standard, where the standard value is a five-point measurement mean of 11120N. A larger test value indicates that the tire is less likely to unseat.

[0037] Example 1

[0038] Test tire specifications: 225 / 45R18 91W, test tire mold diameter: 460.6mm;

[0039] Test tire structure: The diameter of the wire bead is 465.5mm, the winding pattern of the wire bead is 5-6-5-4, the height of the apex rubber is 35mm, the number of steel wires is 20, and the thickness of the sidewall outer rubber is 6mm.

[0040] The difference between the diameter of the bead ring of the test tire in this example and the mold diameter of the corresponding tire is 4.9 cm, less than 5 mm. The test tire was tested according to the GB / T 4502-2016 standard, and the bead resistance test result was 12232N, exceeding the standard value of 11120N.

[0041] From the above, it can be seen that through the simulation analysis of the bead unseating test of the low-section tire of the present invention, the bead unseating resistance of the test tire of Example 1 is greater than the standard value, that is, the bead unseating resistance test results of the tire using the low-section tire structure of the present invention meet the GB / T4502-2016 testing standard, which can improve the fit between the tire and the rim and effectively prevent the tire from unseating.

[0042] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. It should be pointed out that although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. A low-profile tire structure, characterized by: including a bead portion, the bead portion including An apex rubber is provided at the bottom of the bead portion, and the height of the apex rubber is higher than 65% of the height of the lower section of the tire; A wire ring is provided at the bottom of the apex rubber and is formed by winding a plurality of single steel wires. The difference between the diameter of the wire ring and the diameter of the corresponding tire mold is less than 5 mm, and the number of steel wires arranged in the bottom layer of the wire ring is greater than 4.

2. The low-profile tire structure according to claim 1, characterized in that: The height of the upper endpoint of the apex rubber is 70% to 80% of the height of the lower section of the tire.

3. The low-profile tire structure according to claim 1, characterized in that: The height of the apex rubber is 30 mm to 35 mm.

4. The low-profile tire structure according to claim 3, characterized in that: The height of the apex is 35 mm.

5. The low-profile tire structure according to claim 1, characterized in that: The winding pattern of the wire ring is 5-6-5-4 or 4-5-6-5-4.

6. The low-profile tire structure according to claim 1, characterized in that: The diameter of a single steel wire of the wire ring is 1.1 mm to 1.3 mm.

7. The low-profile tire structure according to claim 6, characterized in that: The diameter of a single steel wire of the wire ring is 1.2 mm.

8. The low-profile tire structure according to claim 1, characterized in that: The low-section tire structure further includes a sidewall portion, wherein the thickness of the sidewall portion at the horizontal axis of the cross section is 4 mm to 6 mm.

9. The low-profile tire structure according to claim 8, characterized in that: The sidewall thickness at the rim protection position is 12mm~15mm, and the sidewall thickness at the tire bead position is 11mm~14mm.

10. The low-profile tire structure according to claim 8, characterized in that: The diameter of the wire ring is 467 mm, the winding method of the wire ring is 5-6-5-4, the height of the apex rubber is 35 mm, and the thickness of the sidewall outer rubber is 6 mm.

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