Tire bead structure and tire
By improving the bead structure and adopting a specific layering method consisting of a single rubber core, tire carcass, molding compound, bead wrapping fabric, and nylon wrapping fabric, the problem of bead cracking under heavy load was solved, resulting in increased strength and enhanced safety performance.
Patent Information
- Application Number
- CN202520159876.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing tire bead structures are prone to cracking when the load increases, affecting tire safety performance.
A bead structure is adopted, which consists of a single rubber core, a carcass, a bead rubber, a bead wrapping, a nylon wrapping, a sidewall bead rubber, and an inner liner. Through specific layering and connection methods, the strength and stability of the bead are enhanced, and stress concentration is avoided.
It improves the strength of the tire bead, reduces bead cracking, enhances the tire's load-bearing capacity and safety performance, and extends the tire's service life.
Smart Images
Figure CN223644576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tire technology, and more specifically, to a tire bead structure and a tire. Background Technology
[0002] The main performance characteristics of all-steel tubeless radial tires include: load-bearing capacity, wear resistance, cushioning performance, traction performance, safety performance, and durability performance. All-steel tubeless radial tires are mainly used in trucks, automobiles, and buses.
[0003] As truck loads continue to increase, the requirements for tire load-bearing performance are becoming increasingly stringent. Bead performance plays a crucial role in tire load-bearing capacity.
[0004] Existing tire bead structures are prone to cracking when the load increases, which in turn affects the tire's safety performance. Utility Model Content
[0005] The main purpose of this invention is to provide a tire bead structure and tire to solve the problem that existing tire bead structures are prone to cracking when the load increases.
[0006] To achieve the above objectives, according to one aspect of the present invention, a bead structure is provided, comprising, from the inner layer to the outer layer: a single rubber core; a tire body, wound around the outer side, bottom, and inner side of the single rubber core; a molding compound, attached to the outer side of the single rubber core and the tire body; a bead wrap, wound around the outer side of the molding compound, and also wound around the bottom and inner side of the tire body; a nylon wrap, wound around the outer side of the molding compound, and also wound around the outer side, bottom, and inner side of the bead wrap; a sidewall molding compound and an inner liner layer, wherein the sidewall molding compound is attached to the outer side of the molding compound and the nylon wrap; the inner liner layer is wound around the inner side of the tire body and the bead wrap, and also wound around the inner side and bottom of the nylon wrap; a sidewall rubber and abrasion-resistant rubber, wherein the sidewall rubber is attached to the outer side of the molding compound and the sidewall molding compound; the abrasion-resistant rubber is wound around the outer side of the sidewall molding compound, and also wound around the outer side and / or bottom of the nylon wrap, and also wound around the inner side and bottom of the inner liner layer.
[0007] Furthermore, the sidewall rubber portion is attached to the outside of the wear-resistant rubber.
[0008] Furthermore, the nylon overlay includes an inner overlay and an outer overlay from the inner layer to the outer layer; the inner overlay is wrapped around the outside of the molding compound, and also wrapped around the outside, bottom, and inside of the bead overlay; the outer overlay is wrapped around the outside, bottom, and inside of the inner overlay; the sidewall molding compound is attached to the outside of the inner and outer overlays; the inner liner is wrapped around the inside of the inner overlay, and also wrapped around the inside and bottom of the outer overlay; and the abrasion-resistant compound is wrapped around the outside of the outer overlay.
[0009] Furthermore, the sidewall molding compound, the molding compound, and the single core are all made of the same rubber compound.
[0010] Furthermore, the outer end point of the tire body is higher than the outer end point of the bead wrapping cloth, and the difference between the outer end point of the tire body and the outer end point of the bead wrapping cloth ranges from 15mm to 20mm.
[0011] Furthermore, the outer end point of the tire body is higher than the inner end point of the bead wrapping cloth, and the difference between the outer end point of the tire body and the inner end point of the bead wrapping cloth ranges from 6 mm to 12 mm.
[0012] Furthermore, the inner end point of the inner layer is higher than the inner end point of the outer layer, and the outer end point of the inner layer is higher than the outer end point of the outer layer; the difference between the inner end point of the inner layer and the inner end point of the outer layer ranges from 5mm to 10mm; the difference between the outer end point of the inner layer and the outer end point of the outer layer ranges from 5mm to 10mm.
[0013] Furthermore, the outer end of the outer fabric layer is flush with the outer end of the tire body.
[0014] Furthermore, the highest point of the single rubber core is higher than the outer end point of the tire carcass, and the difference between the highest point of the single rubber core and the outer end point of the tire carcass ranges from 15mm to 20mm.
[0015] Furthermore, the bead structure also includes a wire bead, which is disposed within the space formed by the tire carcass; the wire bead is connected to the single rubber core and to the tire carcass.
[0016] According to another aspect of the present invention, a tire is provided that includes the above-described bead structure.
[0017] Applying the technical solution of this utility model, the tire bead structure, from the inner layer to the outer layer, includes: a single rubber core, a tire carcass, a molding compound, a bead wrap, a nylon wrap, a sidewall molding compound, an inner liner, and sidewall rubber and abrasion-resistant rubber. The tire carcass is wrapped around the outer, bottom, and inner sides of the single rubber core; the molding compound is attached to the outer sides of the single rubber core and the tire carcass; the bead wrap is wrapped around the outer side of the molding compound, and also around the bottom and inner sides of the tire carcass; the nylon wrap is wrapped around the outer side of the molding compound, and also around the outer, bottom, and inner sides of the bead wrap; the sidewall molding compound is attached to the outer sides of the molding compound and the nylon wrap; the inner liner is wrapped around the inner sides of the tire carcass and the bead wrap, and also around the inner and bottom sides of the nylon wrap; the sidewall rubber is attached to the outer sides of the molding compound and the sidewall molding compound; the abrasion-resistant rubber is wrapped around the outer side of the sidewall molding compound, and also around the outer and / or bottom sides of the nylon wrap, and around the inner and bottom sides of the inner liner.
[0018] Using the bead structure of this application can improve bead strength, reduce bead cracking, enhance tire load capacity, and ensure tire safety performance. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0020] Figure 1 A schematic diagram of the tire bead structure according to the present invention is shown;
[0021] Figure 2 It shows Figure 1 Enlarged view of point A of the bead structure in the image.
[0022] The above figures include the following reference numerals:
[0023] 1. Bead structure; 10. Sidewall rubber; 11. Connecting surface; 20. Sidewall profile rubber; 30. Nylon fabric covering; 31. Inner fabric covering; 311. Third outer end point; 312. First inner end point; 32. Outer fabric covering; 321. Fourth outer end point; 322. Second inner end point; 40. Abrasion-resistant rubber; 50. Bead covering; 51. Second outer end point; 52. Third inner end point; 60. Profile rubber; 70. Single rubber core; 71. Highest point; 80. Carcass; 81. First outer end point; 90. Inner liner; 100. Bead wire. Detailed Implementation
[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0027] This utility model provides a tire bead structure 1, please refer to... Figure 1 and Figure 2 The bead structure 1, from the inner layer to the outer layer, includes: a single rubber core 70, a carcass 80, a molding rubber 60, a bead wrapping cloth 50, a nylon wrapping cloth 30, a sidewall molding rubber 20, an inner liner layer 90, a sidewall rubber 10, and a wear-resistant rubber 40.
[0028] The tire carcass 80 is wrapped around the outer, bottom, and inner sides of the single rubber core 70. The molding compound 60 is attached to the outer sides of both the single rubber core 70 and the tire carcass 80, meaning the molding compound 60 is in contact with and connected to both the single rubber core 70 and the tire carcass 80. The bead wrap 50 is wrapped around the outer side of the molding compound 60, and also around the bottom and inner sides of the tire carcass 80, meaning the bead wrap 50 is in contact with and connected to both the molding compound 60 and the tire carcass 80. The nylon wrap 30 is wrapped around the outer side of the molding compound 60, and also around the outer, bottom, and inner sides of the bead wrap 50, meaning the nylon wrap 30 is in contact with and connected to both the molding compound 60 and the bead wrap 50. The sidewall molding compound 20 is attached to the outer side of both the molding compound 60 and the nylon wrap 30, meaning the sidewall molding compound 20 is in contact with and connected to both the molding compound 60 and the nylon wrap 30. The inner liner 90 is wrapped around the inside of the tire carcass 80 and the bead wrap 50, and also around the inside and bottom of the nylon wrap 30. That is, the inner liner 90 is in contact with and connected to the tire carcass 80, the bead wrap 50, and the nylon wrap 30. The sidewall rubber 10 is attached to the outside of the profile rubber 60 and the sidewall profile rubber 20. That is, the sidewall rubber 10 is in contact with and connected to both the profile rubber 60 and the sidewall profile rubber 20. The abrasion-resistant rubber 40 is wrapped around the outside of the sidewall profile rubber 20, and also around the outside and / or bottom of the nylon wrap 30, and around the inside and bottom of the inner liner 90. That is, the abrasion-resistant rubber 40 is in contact with and connected to the sidewall profile rubber 20, the nylon wrap 30, and the inner liner 90.
[0029] It should be noted that the outer side, inner side, and bottom in this application are as follows: Figure 1 and Figure 2 The orientation shown.
[0030] Specifically, the outer end of the tire body 80 is fixed with molding compound 60 and single rubber core 70.
[0031] In this application, the nylon fabric 30 is double-layered, that is, the nylon fabric 30 includes an inner fabric 31 and an outer fabric 32 from the inner layer to the outer layer.
[0032] The inner layer fabric 31 is wrapped around the outside of the molding rubber 60, and also around the outside, bottom, and inside of the bead fabric 50, meaning the inner layer fabric 31 is in contact with and connected to both the molding rubber 60 and the bead fabric 50. The outer layer fabric 32 is wrapped around the outside, bottom, and inside of the inner layer fabric 31, meaning the inner layer fabric 31 and the outer layer fabric 32 are in contact with and connected to each other. The sidewall molding rubber 20 is attached to the outside of the molding rubber 60, the inner layer fabric 31, and the outer layer fabric 32, meaning the sidewall molding rubber 20 is in contact with and connected to both the molding rubber 60, the inner layer fabric 31, and the outer layer fabric 32. The inner liner layer 90 is wrapped around the inside of the tire carcass 80, the bead fabric 50, and the inner layer fabric 31, and also around the inside and bottom of the outer layer fabric 32, meaning the inner liner layer 90 is in contact with and connected to both the tire carcass 80, the bead fabric 50, the inner layer fabric 31, and the outer layer fabric 32. The wear-resistant rubber 40 is wrapped around the outside of the sidewall rubber 20, and around the outside and / or bottom of the outer layer fabric 32, and around the inside and bottom of the inner liner layer 90; that is, the wear-resistant rubber 40 is in contact with and connected to the sidewall rubber 20, the outer layer fabric 32 and the inner liner layer 90.
[0033] In this application, the sidewall rubber 10 is partially attached to the outside of the wear-resistant rubber 40, that is, the sidewall rubber 10 is in contact with and connected to the wear-resistant rubber 40, the molding rubber 60 and the sidewall molding rubber 20.
[0034] Optionally, the connection surface 11 between the sidewall rubber 10 and the wear-resistant rubber 40 is an inclined surface; and at the connection between the sidewall rubber 10 and the wear-resistant rubber 40, the sidewall rubber 10 is located on the outside of the wear-resistant rubber 40.
[0035] Specifically, the lower end of the sidewall rubber 10 is connected to the upper end of the wear-resistant rubber 40.
[0036] In this application, the bead structure 1 further includes a wire bead 100, which is disposed within the space formed by the tire carcass 80; the wire bead 100 is connected to the single rubber core 70 and the tire carcass 80.
[0037] Specifically, the upper part of the wire ring 100 is connected to the single rubber core 70, and the lower part of the wire ring 100 is connected to the tire carcass 80.
[0038] In this application, the sidewall molding compound 20, the molding compound 60, and the single core compound 70 are the same type of rubber compound.
[0039] In this application, the skeleton material of the carcass 80 and the bead wrapping 50 is 0.25+6+12×0.225HT, where 0.25+6+12×0.225HT is a high-strength steel wire; the bead wire is 1.65NT; in order to improve the bead strength and reduce bead cracking.
[0040] Specifically, the nylon fabric used is NY66.
[0041] In this application, the outer end point of the tire body 80 is higher than the outer end point of the bead wrapping 50, and the difference between the outer end point of the tire body 80 and the outer end point of the bead wrapping 50 ranges from 15mm to 20mm. As shown in the figure, the first outer end point 81 is the outer end point of the tire body 80, and the second outer end point 51 is the outer end point of the bead wrapping 50.
[0042] In this application, the outer end point of the tire carcass 80 is higher than the inner end point of the bead wrapping 50, and the difference between the outer end point of the tire carcass 80 and the inner end point of the bead wrapping 50 ranges from 6 mm to 12 mm. As shown in the figure, the third inner end point 52 is the inner end point of the bead wrapping 50.
[0043] In this application, the inner endpoint of the inner layer fabric 31 is higher than the inner endpoint of the outer layer fabric 32, and the outer endpoint of the inner layer fabric 31 is higher than the outer endpoint of the outer layer fabric 32; the difference between the inner endpoints of the inner layer fabric 31 and the outer endpoints of the outer layer fabric 32 ranges from 5mm to 10mm; the difference between the outer endpoints of the inner layer fabric 31 and the outer endpoints of the outer layer fabric 32 also ranges from 5mm to 10mm. As shown in the figure, the third outer endpoint 311 is the outer endpoint of the inner layer fabric 31, and the fourth outer endpoint 321 is the outer endpoint of the outer layer fabric 32; the first inner endpoint 312 is the inner endpoint of the inner layer fabric 31, and the second inner endpoint 322 is the inner endpoint of the outer layer fabric 32.
[0044] In this application, the outer end point of the outer layer fabric 32 is flush with the outer end point of the tire carcass 80.
[0045] In this application, the highest point 71 of the single rubber core 70 is higher than the outer end point of the tire body 80, and the difference between the highest point 71 of the single rubber core 70 and the outer end point of the tire body 80 ranges from 15mm to 20mm.
[0046] In this application, the inner end point and the outer end point of the inner layer fabric 31 are both higher than the steel wire loop 100, and the inner end point and the outer end point of the outer layer fabric 32 are both higher than the steel wire loop 100.
[0047] This utility model also provides a tire, which includes the above-described bead structure 1.
[0048] Optionally, the bead structure 1 is a heavy-duty bead structure. For example, the bead structure 1 is a heavy-duty bead for an all-steel tubeless radial tire.
[0049] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:
[0050] In the bead structure 1 provided by this utility model, the bead structure 1 includes, from the inner layer to the outer layer, the following components in sequence: single rubber core 70, tire body 80, molding rubber 60, bead wrapping cloth 50, nylon wrapping cloth 30, sidewall molding rubber 20 and inner liner layer 90, as well as sidewall rubber 10 and wear-resistant rubber 40. The tire carcass 80 is wrapped around the outside, bottom, and inside of the single rubber core 70; the profile rubber 60 is attached to the outside of the single rubber core 70 and the tire carcass 80; the bead wrap 50 is wrapped around the outside of the profile rubber 60, and also around the bottom and inside of the tire carcass 80; the nylon wrap 30 is wrapped around the outside of the profile rubber 60, and also around the outside, bottom, and inside of the bead wrap 50; the sidewall profile rubber 20 is attached to the outside of the profile rubber 60 and the nylon wrap 30; the inner liner 90 is wrapped around the inside of the tire carcass 80 and the bead wrap 50, and also around the inside and bottom of the nylon wrap 30; the sidewall rubber 10 is attached to the outside of the profile rubber 60 and the sidewall profile rubber 20; the abrasion-resistant rubber 40 is wrapped around the outside of the sidewall profile rubber 20, and also around the outside and / or bottom of the nylon wrap 30, and around the inside and bottom of the inner liner 90.
[0051] The bead structure 1 of this application has the outermost sidewall rubber 10 and wear-resistant rubber 40, the bottommost wear-resistant rubber 40, and the innermost innermost inner liner layer 90.
[0052] The sidewall molding compound 20 avoids the rigidity mismatch problem between the wear-resistant rubber 40 and the sidewall compound 10 and the nylon overlay 30, achieving a smooth transition in rigidity from the wear-resistant rubber 40 and the sidewall compound 10 to the nylon overlay 30. The double-layer structure of the nylon overlay 30 increases bead strength and reduces tire deformation under heavy loads. The molding compound 60 reduces stress at the outer end of the tire carcass 80, buffers stress at the outer end of the tire carcass 80 and the outer end of the bead overlay 50, and avoids stress concentration. The single core 70 controls the angle of the tire carcass 80. The highest point 71 of the single core 70 is higher than the outer end of the tire carcass 80, which strengthens the bead strength, buffers stress at the outer end of the tire carcass 80, and ensures the stability of the outer end of the tire carcass 80 under heavy loads.
[0053] Using the bead structure 1 of this application can improve bead strength, reduce bead cracking, enhance tire load capacity, and ensure tire safety performance.
[0054] By using the bead structure 1 of this application, the durability of the tire is improved and the probability of tire bead cracking is greatly reduced.
[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A tire bead structure, characterized in that, From the innermost layer to the outermost layer, the following are included: Single core (70); The tire body (80) is wrapped around the outside, bottom and inside of the single rubber core (70); The molding adhesive (60) is applied to the outside of the single adhesive core (70) and the tire body (80); The ferrule (50) is wrapped around the outside of the molding compound (60) and around the bottom and inside of the tire body (80); Nylon fabric (30) is wrapped around the outside of the molding adhesive (60) and around the outside, bottom and inside of the ferrule fabric (50); Sidewall rubber (20) and inner liner (90), wherein the sidewall rubber (20) is attached to the outside of the sidewall rubber (60) and the nylon fabric (30); the inner liner (90) is wrapped around the inside of the tire body (80) and the bead fabric (50), and is wrapped around the inside and bottom of the nylon fabric (30); Sidewall rubber (10) and abrasion-resistant rubber (40), wherein the sidewall rubber (10) is attached to the outside of the profile rubber (60) and the sidewall profile rubber (20); the abrasion-resistant rubber (40) is wrapped around the outside of the sidewall profile rubber (20), and around the outside and / or bottom of the nylon fabric (30), and around the inside and bottom of the inner liner (90).
2. The bead structure according to claim 1, characterized in that, Part of the sidewall rubber (10) is attached to the outside of the wear-resistant rubber (40).
3. The bead structure according to claim 1, characterized in that, The nylon fabric (30) includes an inner fabric (31) and an outer fabric (32) from the inner layer to the outer layer; The inner layer fabric (31) is wrapped around the outside of the molding adhesive (60), and also wrapped around the outside, bottom and inside of the vent fabric (50); The outer layer fabric (32) is wrapped around the outside, bottom and inside of the inner layer fabric (31); The sidewall adhesive (20) is applied to the outer side of the inner layer fabric (31) and the outer layer fabric (32); the inner liner (90) is wrapped around the inner side of the inner layer fabric (31) and around the inner side and bottom of the outer layer fabric (32); the abrasion-resistant adhesive (40) is wrapped around the outer side of the outer layer fabric (32).
4. The bead structure according to claim 1, characterized in that, The sidewall molding compound (20), the molding compound (60), and the single core compound (70) are made of the same type of rubber.
5. The bead structure according to claim 1, characterized in that, The outer end point of the tire body (80) is higher than the outer end point of the bead wrapping (50), and the difference between the outer end point of the tire body (80) and the outer end point of the bead wrapping (50) ranges from 15 mm to 20 mm; and / or The outer end of the tire body (80) is higher than the inner end of the ferrule wrap (50), and the difference between the outer end of the tire body (80) and the inner end of the ferrule wrap (50) ranges from 6 mm to 12 mm.
6. The bead structure according to claim 3, characterized in that, The inner end point of the inner layer fabric (31) is higher than the inner end point of the outer layer fabric (32), and the outer end point of the inner layer fabric (31) is higher than the outer end point of the outer layer fabric (32); the difference between the inner end point of the inner layer fabric (31) and the inner end point of the outer layer fabric (32) is in the range of 5mm to 10mm; the difference between the outer end point of the inner layer fabric (31) and the outer end point of the outer layer fabric (32) is in the range of 5mm to 10mm.
7. The bead structure according to claim 3, characterized in that, The outer end of the outer layer fabric (32) is flush with the outer end of the tire body (80).
8. The bead structure according to claim 1, characterized in that, The highest point of the single rubber core (70) is higher than the outer end point of the tire body (80), and the difference between the highest point of the single rubber core (70) and the outer end point of the tire body (80) ranges from 15mm to 20mm.
9. The bead structure according to claim 1, characterized in that, The bead structure also includes a wire bead (100), which is disposed within the space formed by the tire carcass (80); the wire bead (100) is connected to the single rubber core (70) and to the tire carcass (80).
10. A tire, characterized in that, The tire bead structure includes any one of claims 1 to 9.