Ultra-low air pressure tire sidewall decorative rib

Abstract

The utility model relates to the technical field of ultra-low pressure tire processing, and discloses an ultra-low pressure tire sidewall decorative rib which comprises a tire crown part, tire shoulder parts are arranged on the two sides of the tire crown part, and tire sidewall parts are arranged on the sides, away from the tire crown part, of the two tire shoulder parts. Decorative protruding strips which are evenly distributed are fixedly connected to the sides, away from each other, of the tire side parts on the two sides, and the multiple decorative protruding strips are circumferentially arranged in an inclined mode in the same direction. And the anti-cracking assembly is arranged on the periphery of the decoration protruding strips, and the anti-cracking assembly can be used for optimizing stress concentration between the decoration protruding strips and reducing the radial cracking risk. According to the utility model, the stress in the vertical direction of the decorative rib in the radial deformation process can be dispersed in a manner that the decorative raised lines are circumferentially arranged at a certain inclined angle, so that the radial cracking of the tire side wall in the direction of the decorative rib, which is caused by the fatigue damage of the radial decorative rib, is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of ultra-low pressure tire processing technology, and in particular to a sidewall decorative line for ultra-low pressure tires. Background Technology

[0002] Ultra-low pressure tires, also known as low-pressure tires or extremely low pressure tires, are specially designed tires optimized for operation under extremely low air pressure. Compared to regular tires, these tires have a tire pressure far below the standard value and are typically used in specific applications such as off-road driving, military use, agricultural use, and certain heavy-duty vehicles.

[0003] For aesthetic purposes, various sidewall patterns are often designed, with decorative lines engraved within these patterns. These decorative lines greatly enhance the tire's appearance and clearly distinguish information such as manufacturer, brand, specifications, and tread pattern. However, ultra-low pressure tires operate at very low pressures, 15% to 25% lower than regular tires. With the tire load remaining constant, the radial deflection of the tire increases. Since tires deform radially during use, this manifests as a bulge on the sidewall. Given that the existing decorative lines point towards the tire's center, ultra-low pressure tires experience excessive stretching of the decorative lines during large radial deformations. Furthermore, the circumferential stretching of the decorative lines at the groove bottom is also significant. Therefore, the large radial and circumferential deformation of the decorative lines leads to repeated radial stretching and circumferential tearing at the groove bottom, easily causing premature tire cracking, chipping, and other defects, thus affecting the tire's lifespan. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a sidewall decorative line for ultra-low pressure tires, which aims to improve the problem that traditional decorative lines in the prior art can cause excessive deformation on ultra-low pressure tires, thereby causing tire cracking.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sidewall decorative line for an ultra-low pressure tire, including a crown portion, with shoulder portions on both sides of the crown portion, and a sidewall portion on the side of each shoulder portion away from the crown portion. Uniformly distributed decorative ridges are fixedly connected to the opposite sides of the sidewall portions on both sides, and the plurality of decorative ridges are arranged circumferentially in the same direction. A crack-prevention component is disposed on the outer periphery of the decorative ridges, which can be used to optimize stress concentration between the decorative ridges and reduce the risk of radial cracking.

[0006] Optionally, the anti-cracking component includes a flat groove, with multiple flat grooves formed at the bottom between adjacent decorative protrusions, and the top of each of the multiple decorative protrusions being chamfered.

[0007] Optionally, reflective coatings are provided on the upper and lower parts of the two tire sidewalls that are far apart from each other.

[0008] Optionally, the angle between the plurality of decorative protrusions and the direction pointing to the center is 23 to 25 degrees.

[0009] Optionally, the width of the plurality of said flat grooves is 0.2 mm to 0.4 mm.

[0010] Optionally, the tilt direction of the plurality of decorative protrusions is the same as the forward driving direction of the tires.

[0011] This utility model has the following beneficial effects:

[0012] 1. In this utility model, by arranging the decorative protrusions in a circumferential manner at a certain inclination angle, the stress in the vertical direction of the decorative line during radial deformation can be dispersed, thereby effectively reducing the radial cracking of the tire sidewall along the direction of the decorative line caused by fatigue failure of the radial decorative line.

[0013] 2. In this utility model, by processing flat grooves between adjacent individual decorative protrusions, stress concentration can be effectively avoided, thereby preventing radial cracking of the tire. At the same time, by chamfering the protrusions of the decorative protrusions, sharp and fragile edges can be effectively avoided. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a sidewall decorative line for an ultra-low air pressure tire proposed in this utility model;

[0015] Figure 2 This is a partial view of a decorative raised strip on the sidewall trim of an ultra-low pressure tire according to the present invention.

[0016] Figure 3 This is a cross-sectional view of a decorative raised strip on the sidewall trim of an ultra-low pressure tire, as proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the existing tire sidewall decorative line pointing towards the center of the circle along the circumference, as proposed in this utility model;

[0018] Figure 5 This is a cross-sectional view of the existing tire sidewall trim line proposed in this utility model.

[0019] Legend:

[0020] 1. Tire crown; 2. Tire shoulder; 3. Tire sidewall; 4. Decorative ridge; 5. Chamfer; 6. Flat groove; 7. Reflective coating. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-5 An embodiment of this utility model provides: a sidewall decorative line for an ultra-low pressure tire, including a crown portion 1, a shoulder portion 2 on both sides of the crown portion 1, a sidewall portion 3 on the side of the two shoulder portions 2 away from the crown portion 1, a reflective coating 7 on the upper and lower parts of the sidewall portions 3 away from each other, and decorative raised strips 4 uniformly distributed and fixedly connected to the sidewall portions 3 away from each other. The multiple decorative raised strips 4 are arranged in a circle with an inclination in the same direction, and the inclination direction of the multiple decorative raised strips 4 is the forward driving direction of the tire. The angle between the multiple decorative raised strips 4 and the direction pointing to the center of the circle is 23 to 25 degrees.

[0023] Compared to the traditional decorative line design that points towards the center, the decorative ridges 4 arranged in a circular pattern with the same inclination direction can disperse the vertical stress on the decorative lines during radial deformation. This avoids stress concentration on the vertical decorative lines pointing towards the center. Furthermore, the angled decorative line design, with multiple decorative lines on a vertical horizontal plane, prevents stress from concentrating radially along a single decorative line. This effectively reduces the risk of radial cracking of the tire sidewall along the decorative line direction due to fatigue failure of the radial decorative lines. According to stress analysis theory calculations and experimental verification, the improvement effect is best when the angle α between the decorative lines and the tire center direction is between 23 and 25 degrees. At the same time, the reflective coating 7 on the sidewall 3 allows for reflection under light, making it easier for workers to observe the deformation of the sidewall 3 and the decorative ridges 4.

[0024] Reference Figures 1-5 The anti-cracking component is disposed on the outer periphery of the decorative protrusion 4. The anti-cracking component can be used to optimize the stress concentration between the decorative protrusions 4 and reduce the risk of radial cracking. The anti-cracking component includes a flat groove 6. Multiple flat grooves 6 are opened at the bottom between adjacent decorative protrusions 4. The width of the multiple flat grooves 6 is 0.2 mm to 0.4 mm. The top of the multiple decorative protrusions 4 is provided with a chamfer 5.

[0025] Because the sharp edges at the bottom of traditional decorative strips can cause stress concentration, the bottom of the decorative strip grooves can be stretched and torn in both the radial and circumferential directions when the tire undergoes large radial deformation. Therefore, by machining a flat groove 6 with a width of 0.2 mm to 0.4 mm at the bottom between the protrusions of adjacent decorative strips 4, the pressure is dispersed by the flat groove 6. This effectively prevents the radial cracking of the tire from being aggravated by the concentration of pressure at the bottom of the grooves on the sharp parts during radial deformation. Furthermore, by machining a chamfer 5 on the surface of the decorative strip 4, sharp and fragile edges can be avoided without affecting the visual effect of the decorative strips. This also prevents scratches and chipping during vulcanization and tire transportation, ensuring the quality of the tire outer shell.

[0026] Working principle: In actual use, by arranging the decorative protrusions 4 in a circular manner at a certain angle, the stress in the vertical direction of the decorative line during radial deformation can be dispersed, avoiding stress concentration on the vertical decorative line pointing to the center of the circle, thereby effectively reducing radial cracking of the tire sidewall along the direction of the decorative line caused by fatigue failure of the radial decorative line.

[0027] In addition, by processing a flat groove 6 with a certain width between adjacent individual decorative ridges 4, the pressure can be prevented from concentrating at the sharp part of the groove of the decorative ridge 4 during the radial deformation of the trim, thus avoiding stress concentration and preventing radial cracking of the tire. At the same time, by chamfering the raised part of the decorative ridge 4, sharp and fragile edges can be effectively avoided.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultra-low pressure tyre sidewall trim line comprising a crown portion (1), characterised in that: The crown part (1) is provided with shoulder parts (2) on both sides, the two shoulder parts (2) are provided with side parts (3) away from the crown part (1) on one side, the two side parts (3) are fixedly connected with evenly distributed decorative ribs (4) on the side away from each other, and the plurality of decorative ribs (4) are circumferentially arranged in the same direction. The anti-cracking assembly is arranged outside the decorative rib (4), and can be used for optimizing stress concentration between the decorative ribs (4) and reducing the risk of radial cracking.

2. An ultralow pressure tire sidewall trim strip as defined in claim 1, wherein: The anti-cracking assembly comprises flat grooves (6), a plurality of flat grooves (6) are arranged in the inner bottom between adjacent decorative ribs (4), and the convex top of the plurality of decorative ribs (4) is provided with a chamfer (5).

3. An ultralow pressure tire sidewall trim strip as defined in claim 1 wherein: The upper and lower parts of the two side parts (3) on the side away from each other are provided with a reflective coating (7).

4. An ultralow pressure tire sidewall trim strip as defined in claim 1, wherein: The angle between the plurality of decorative ribs (4) and the direction pointing to the center of the circle is 23-25 degrees.

5. An ultralow pressure tire sidewall trim strip as defined in claim 2 wherein: The width of the plurality of flat grooves (6) is 0.2-0.4 mm.

6. An ultralow pressure tire sidewall trim strip as defined in claim 1, wherein: The inclination direction of the plurality of decorative ribs (4) is the forward driving direction of the tire.

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