Half-steel radial tire with improved bead separation

Abstract

The application discloses a semi-steel radial tire with improved tire bead separation, comprising a tire crown, a tire side, a tire bead, a tire body, and a reinforcing body. The tire side comprises a tire side rubber layer, a tire side filler layer, and the reinforcing body. The tire bead comprises a tire bead steel wire and a tire bead filler. The tire body comprises a tire body rubber layer and a tire body filler layer. The reinforcing body is embedded in the tire side filler layer and is arranged opposite to the tire bead filler. In one aspect, by arranging the tire body rubber layer and the tire body filler layer, the tire bead can be covered in the tire body, thereby improving the condition that the tire bead is easily deformed or separated from the tire body and the tire side when the tire bead is stressed. In another aspect, by arranging the tire side rubber layer and the tire side filler layer, the tire bead steel wire and the tire bead filler can be protected from the outside of the tire, thereby further improving the condition that the tire bead is easily deformed or separated from the tire body and the tire side when the tire bead is stressed. Finally, by arranging the reinforcing body opposite to the tire bead filler, the condition that the tire bead is easily deformed or separated from the tire body and the tire side when the tire bead is stressed can be further improved.

Description

Technical Field

[0001] This application relates to the technical field of tires, specifically to a semi-steel radial tire with improved bead separation. Background Technology

[0002] Semi-steel radial tires are a new type of tire in which the tire cords are arranged in the radial direction, and a buffer layer with cords arranged circumferentially or nearly circumferentially is tightly wrapped around the tire body.

[0003] The outer edge of a typical tire bead generally includes: a sidewall that extends radially outward from the bead to the tire crown for bearing the impact forces generated during engagement with the rim; a bead that is designed to contact the mounting rim for securing the tire to the rim; and a bead filler material placed outside each bead wire and within the carcass reinforcement curling space.

[0004] When vehicles travel on unpaved roads, dual-composite rubber compounds are typically used to ensure the durability of the tire bead area, enhancing the tire's resistance to punctures from mud and stones. Tires subjected to prolonged high-load driving are prone to bead separation and blowout failures. Furthermore, when driving on unpaved roads, drivers often opt to lower tire pressure to increase grip, which further increases the likelihood of bead separation and reduces overall vehicle safety. Summary of the Invention

[0005] Based on this, it is necessary to propose a semi-steel radial tire that improves bead separation to address the aforementioned technical problems.

[0006] This semi-steel radial tire with improved bead separation includes:

[0007] tire crown;

[0008] The sidewall is disposed on both sides of the tire crown and connected to the tire crown. The sidewall includes a sidewall rubber layer, a sidewall filler layer and a reinforcement. The sidewall rubber layer covers the outside of the sidewall filler layer.

[0009] A bead is disposed on the tire sidewall. The bead includes a bead wire and a bead filler, with the bead filler covering the outside of the bead wire.

[0010] The tire body is disposed inside the tire crown and the tire sidewall. The tire body includes a tire body rubber layer and a tire body filler layer. The tire body filler layer covers the outside of the tire bead filler. The tire body rubber layer covers the inside of the tire body filler layer. The tire sidewall rubber layer and the tire sidewall filler layer cover the outside of the tire body filler layer.

[0011] The reinforcement is embedded in the sidewall filler layer and is positioned opposite to the bead filler.

[0012] In some embodiments, the radial height of the sidewall rubber layer is set to H1, the radial height of the bead filler is set to H2, and the radial height of the reinforcement is set to H3, which satisfies the following:

[0013] 1 / 3H1≤H2≥1 / 2H1, 1 / 4H1≤H3≥1 / 3H1.

[0014] In some embodiments, the thickness of the reinforcement gradually decreases from the center to both sides along the radial direction of the tire.

[0015] In some embodiments, a protrusion is provided on the outer side of the reinforcement, the protrusion being integrally connected to the reinforcement and embedded in the sidewall filling layer.

[0016] In some embodiments, the protrusion includes:

[0017] An upwardly inclined protrusion is disposed on the side of the reinforcement away from the sidewall rubber layer, with its end inclined away from the bead wire.

[0018] A downward-sloping protrusion is disposed on the side of the reinforcement away from the bead filler, with its end inclined away from the tire crown.

[0019] In some embodiments, both the upwardly inclined protrusion and the downwardly inclined protrusion are provided in multiple forms.

[0020] In some embodiments, the bead filler includes:

[0021] The bead triangle is wrapped around the outside of the bead wire;

[0022] The bead extension rubber is connected to the bead triangle rubber along the radial direction of the tire.

[0023] In some embodiments, the semi-steel radial tire with improved bead separation further includes:

[0024] A rim protection strip is provided on the outer side of the tire sidewall.

[0025] In some embodiments, the rim protection strip is disposed opposite to the center of the reinforcement.

[0026] In some embodiments, the rim protection strip includes:

[0027] An adhesive layer is connected to the sidewall rubber layer;

[0028] An elastic layer is provided on the outside of the adhesive layer;

[0029] A wear-resistant layer is provided on the outside of the elastic layer.

[0030] Compared with the prior art, the beneficial effects of this application are:

[0031] On the one hand, by setting the carcass rubber layer and carcass filler layer, the bead can be encased in the carcass, thereby improving the situation where the bead is prone to deformation or separation from the carcass and sidewall under stress. On the other hand, by setting the sidewall rubber layer and sidewall filler layer, the bead wires and bead filler can be protected from the outside of the tire, further improving the situation where the bead is prone to deformation or separation from the carcass and sidewall under stress. Finally, by setting the reinforcement body, which is set opposite to the bead filler body, the situation where the bead is prone to deformation or separation from the carcass and sidewall under stress can be further improved. Attached Figure Description

[0032] Figure 1 This is a cross-sectional schematic diagram of some structures in the exemplary embodiments of this application;

[0033] Figure 2 This is a cross-sectional schematic diagram showing the bead structure in an exemplary embodiment of this application;

[0034] Figure 3 This is a cross-sectional schematic diagram showing the enhancement in an exemplary embodiment of this application;

[0035] Figure 4 This is a cross-sectional view of the rim protection strip in an exemplary embodiment of this application.

[0036] In the diagram: 1. Tire crown; 21. Bead wire; 22. Bead filler; 221. Bead triangle rubber; 222. Bead extension rubber; 31. Tire carcass rubber layer; 32. Tire carcass filler layer; 41. Tire sidewall rubber layer; 42. Tire sidewall filler layer; 43. Reinforcing body; 4311. Upward sloping protrusion; 4312. Downward sloping protrusion; 5. Rim protection strip; 51. Adhesive layer; 52. Elastic layer; 53. Wear-resistant layer. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] As described in the background section, a semi-steel radial tire is a new type of tire in which the tire carcass cords are arranged in a radial direction, and a buffer layer with cords arranged circumferentially or nearly circumferentially is tightly wrapped around the tire carcass. The outer edge of a typical tire bead generally includes: a sidewall, extending radially outward from the bead to the tire crown, used to bear the impact force generated during contact with the rim; a bead, designed to contact the mounting rim and secure the tire to it; and a bead filler, placed outside each bead wire and within the crimped space of the tire carcass reinforcement. When vehicles travel on unpaved roads, to ensure the durability of the tire bead area, dual-composite rubber compounds are usually used to enhance the tire's resistance to punctures from mud and stones. Tires subjected to prolonged high-load driving are prone to bead separation and blowout failures. Furthermore, when driving on unpaved roads, people often choose to reduce tire pressure to increase tire grip, leading to a higher likelihood of bead separation and reduced overall vehicle safety.

[0041] To address the aforementioned problems, this application proposes a semi-steel radial tire with improved bead separation, referring to... Figure 1 It mainly includes the tire crown 1, tire sidewall, tire bead, tire body and rim protection strip 5. The tire crown 1 is set on the outer circumferential surface of the tire body. The tire sidewall has two crowns and is connected to the two sides of the tire body respectively. At the same time, the outer edge of the tire sidewall is connected to the tire crown 1. There are two tire beads and they are connected to the tire body to maintain the shape of the inner circle of the tire and are connected to the rim. The rim protection strip 5 is used to protect the rim from scratches and to further protect the tire bead.

[0042] Specifically, refer to Figure 1 and Figure 2 In the exemplary embodiment, the bead includes a bead wire 21 and a bead filler 22. The bead filler 22 is disposed over the outside of the bead wire 21.

[0043] Furthermore, referring to Figure 2 The bead filler 22 includes a bead triangle rubber 221 and a bead extension rubber 222. Both the bead triangle rubber 221 and the bead extension rubber 222 are made of rubber compound with a Shore hardness of no more than 90 in the vulcanized state. The bead triangle rubber 221 covers the outside of the bead wire 21; the bead extension rubber 222 is fixedly connected to the bead triangle rubber 221 along the radial direction of the tire. The bead triangle rubber 221 directly protects the bead wire 21, thus improving the tendency of the bead wire 21 to deform. The bead extension rubber 222 fixes the bead wire 21 and the bead triangle rubber 221 into the tire carcass, allowing stress to be transferred to the entire tire carcass when the bead is under stress, thereby improving the stress and pressure resistance of the bead.

[0044] Specifically, in the exemplary embodiment, the tire carcass is disposed inside the tire crown 1 and the tire sidewall, and the tire carcass includes a tire carcass rubber layer 31 and a tire carcass filler layer 32. The tire carcass filler layer 32 covers the outside of the bead filler 22, and the tire carcass rubber layer 31 covers the inside of the tire carcass filler layer 32. The tire carcass filler layer 32 and the tire carcass rubber layer 31 sequentially cover the bead triangle rubber 221 and the bead extension rubber 222, thereby enhancing the protection of the bead.

[0045] Specifically, in the exemplary embodiment, the sidewall is disposed on both sides of the tire crown 1 and connected to the tire crown 1. The sidewall includes a sidewall rubber layer 41, a sidewall filling layer 42 and a reinforcement 43. The sidewall rubber layer 41 and the sidewall filling layer 42 cover the outside of the tire body filling layer 32.

[0046] Furthermore, referring to Figure 1 and Figure 3 The reinforcement 43 is made of rubber compound with a Shore hardness of no more than 86 in the vulcanized state. The reinforcement 43 is embedded in the sidewall filler layer 42 and is positioned opposite to the bead filler 22. The sidewall rubber layer 41 covers the outside of the sidewall filler layer 42. That is, the sidewall rubber layer 41, the sidewall filler layer 42 and the reinforcement 43 can provide three layers of protection for the bead to improve the situation where the bead is easily deformed or separated from the tire body and sidewall when subjected to force.

[0047] Furthermore, referring to Figure 2 and Figure 3The radial height of the sidewall rubber layer 41 is set to H1, the radial height of the bead filler 22 is set to H2, and the radial height of the reinforcement 43 is set to H3, satisfying the following conditions: 1 / 3H1≤H2≥1 / 2H1, 1 / 4H1≤H3≥1 / 3H1. That is, the radial height of the bead filler 22 should be one-third to one-half of the radial height of the sidewall rubber layer 41. If it is too high, it may increase the cost and affect the overall stability of the tire body. If it is too low, it may cause the stress to be unable to be transferred to the entire tire body when the bead is under force, affecting the stress protection effect of the tire body on the bead. The radial height of the reinforcement 43 should be one-quarter to one-third of the radial height of the sidewall rubber layer 41. If it is too high, it will not only increase the cost, but also affect the connection stability between the sidewall and the tire body. If it is too low, the radial height of the reinforcement 43 will be too small compared with the radial height of the bead filler 22, which will cause the reinforcement 43 to be unable to provide protection for the entire bead filler 22.

[0048] Furthermore, in the exemplary embodiment, the radial height of the reinforcement 43 is consistent with the radial height of the bead filler 22, and the two are arranged opposite to each other, so that when the tire sidewall is subjected to force, the reinforcement 43 can first receive the stress and then transfer it to the tire body and the bead, thereby providing protection for the bead filler 22.

[0049] Furthermore, referring to Figure 1 and Figure 3 The thickness of the reinforcement 43 gradually decreases from the middle to both sides along the radial direction of the tire, that is, the size of the reinforcement 43 in the less stress-bearing areas of the tire sidewall is reduced, thereby achieving the purpose of reducing costs.

[0050] Furthermore, a protrusion is provided on the outer side of the reinforcement 43. The protrusion is integrally connected to the reinforcement 43 and embedded in the sidewall filling layer 42 to enhance the connection stability between the reinforcement 43 and the sidewall filling layer 42, and to allow the force on the reinforcement 43 to be more fully transferred to the sidewall filling layer 42, thereby achieving the purpose of cushioning and shock absorption. Furthermore, the protrusion includes an upwardly inclined protrusion 4311 and a downwardly inclined protrusion 4312. The upward-sloping protrusion 4311 and the downward-sloping protrusion 4312 are both integrally connected to the reinforcement. The upward-sloping protrusion 4311 is located on the side of the reinforcement 43 away from the sidewall rubber layer 41, with its end inclined away from the bead wire 21. The downward-sloping protrusion 4312 is located on the side of the reinforcement 43 away from the bead filler 22, with its end inclined away from the crown 1. The different orientations of the upward-sloping protrusion 4311 and the downward-sloping protrusion 4312 enable the reinforcement 43 to stably transmit the force to the sidewall filler layer 42 when subjected to different oblique forces. This also strengthens the connection stability between the reinforcement 43 and the sidewall filler layer 42, preventing the reinforcement 43 from separating from the sidewall filler layer 42 when subjected to different oblique forces. Furthermore, multiple upward-sloping protrusions 4311 and downward-sloping protrusions 4312 are provided. In the exemplary embodiment, three upward-sloping protrusions 4311 and three downward-sloping protrusions 4312 are provided.

[0051] Specifically, refer to Figure 1 and Figure 4 In the exemplary embodiment, the rim protection strip 5 is disposed on the outer side of the tire sidewall. Furthermore, the rim protection strip 5 is disposed opposite to the middle part of the reinforcement 43 so as to transfer the force of the rim protection strip 5 to the largest part of the reinforcement 43, thereby strengthening the load bearing capacity.

[0052] Furthermore, the rim protection strip 5 includes an adhesive layer 51, an elastic layer 52, and a wear-resistant layer 53. Specifically, the adhesive layer 51 is a rubber adhesive that is fixedly bonded to the tire sidewall rubber layer 41; the elastic layer 52 is disposed on the outside of the adhesive layer 51; and the wear-resistant layer 53 is disposed on the outside of the elastic layer 52.

[0053] In summary, firstly, by providing the tire carcass rubber layer 31 and tire carcass filler layer 32, the bead can be encased within the tire carcass, thereby improving the situation where the bead is prone to deformation or separation from the tire carcass and sidewall under stress. Secondly, by providing the sidewall rubber layer 41 and sidewall filler layer 42, the bead wire 21 and bead filler 22 can be protected from the outside of the tire, further improving the situation where the bead is prone to deformation or separation from the tire carcass and sidewall under stress. In addition, by providing the reinforcement 43, which is positioned opposite to the bead filler 22, the situation where the bead is prone to deformation or separation from the tire carcass and sidewall under stress can be further improved. Finally, by providing the rim protection strip 5, the protection of the tire sidewall and bead can be strengthened, thereby improving the situation where the bead is prone to deformation or separation from the tire carcass and sidewall under stress.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application 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 this application should be included within the protection scope of this application.

Claims

1. A semi-steel radial tire with improved bead separation, characterized in that, include: tire crown; The sidewall is disposed on both sides of the tire crown and connected to the tire crown. The sidewall includes a sidewall rubber layer, a sidewall filler layer and a reinforcement. The sidewall rubber layer covers the outside of the sidewall filler layer. A bead is disposed on the tire sidewall. The bead includes a bead wire and a bead filler, with the bead filler covering the outside of the bead wire. The tire body is disposed inside the tire crown and the tire sidewall. The tire body includes a tire body rubber layer and a tire body filler layer. The tire body filler layer covers the outside of the tire bead filler. The tire body rubber layer covers the inside of the tire body filler layer. The tire sidewall rubber layer and the tire sidewall filler layer cover the outside of the tire body filler layer. The reinforcement is made of rubber compound with a Shore hardness of no more than 86 in the vulcanized state. The reinforcement is embedded in the sidewall filling layer and is positioned opposite to the bead filler. The outer side of the reinforcement is provided with a protrusion, which is integrally connected to the reinforcement and embedded in the tire sidewall filling layer.

2. The semi-steel radial tire with improved bead separation according to claim 1, characterized in that, The radial height of the sidewall rubber layer is set to H1, the radial height of the bead filler is set to H2, and the radial height of the reinforcement is set to H3, which satisfy the following: 1 / 3H1≤H2≥1 / 2H1, 1 / 4H1≤H3≥1 / 3H1.

3. The semi-steel radial tire with improved bead separation according to claim 1, characterized in that, The thickness of the reinforcement gradually decreases from the center to both sides along the radial direction of the tire.

4. The semi-steel radial tire with improved bead separation according to claim 3, characterized in that, The protrusion includes: An upwardly inclined protrusion is disposed on the side of the reinforcement away from the sidewall rubber layer, with its end inclined away from the bead wire. A downward-sloping protrusion is disposed on the side of the reinforcement away from the bead filler, with its end inclined away from the tire crown.

5. The semi-steel radial tire with improved bead separation according to claim 4, characterized in that, Both the upward-sloping protrusion and the downward-sloping protrusion are provided in multiple forms.

6. The semi-steel radial tire with improved bead separation according to claim 1, characterized in that, The bead filler includes: The bead triangle is wrapped around the outside of the bead wire; The bead extension rubber is connected to the bead triangle rubber along the radial direction of the tire.

7. The semi-steel radial tire with improved bead separation according to claim 1, characterized in that, Also includes: A rim protection strip is provided on the outer side of the tire sidewall.

8. The semi-steel radial tire with improved bead separation according to claim 7, characterized in that, The rim protection strip is positioned opposite to the center of the reinforcement.

9. The semi-steel radial tire with improved bead separation according to claim 7 or 8, characterized in that, The wheel rim protection strip includes: An adhesive layer is connected to the sidewall rubber layer; An elastic layer is provided on the outside of the adhesive layer; A wear-resistant layer is provided on the outside of the elastic layer.

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