A tire structure with low section durability using PCR
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-08-14
AI Technical Summary
（1）本实用新型的PCR低断面耐久性的轮胎结构，通过设置第一胎体端点过下层带束层边端，通过对轮胎胎侧部位第一胎体的端点、第二胎体的端点、胎侧胶端点、三角胶端点合理分布，避免轮胎应力集中，提升轮胎的耐久性能，延长轮胎使用周期。
Smart Images
Figure CN224631488U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tire technology, specifically relating to a PCR low section durability tire structure. Background Technology
[0002] As people's demand for low-profile tires increases, the requirements for tire safety, handling, durability and other performance aspects are also constantly improving. Due to their lower section height, low-profile tires have relatively poor durability and are prone to problems such as sidewall bulges and tire delamination. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a PCR low section durability tire structure to reduce tire durability delamination problems.
[0004] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows: A PCR low section durability tire structure includes a bead and a carcass. The bead includes a triangular rubber and a steel wire bead disposed at the bottom of the triangular rubber. A lower belt layer is disposed on the upper side of the carcass. The carcass includes a first carcass and a second carcass. The first carcass wraps around the bead and extends to the edge of the lower belt layer. The second carcass wraps around the steel wire bead. The first carcass is disposed on the periphery of the second carcass. A tread is disposed on the upper side of the lower belt layer. A sidewall structure is disposed on the outer side of the carcass. The sidewall structure includes a sidewall rubber and a bead rubber. The sidewall rubber is disposed on the outer side of the first carcass. One end of the sidewall rubber is offset from the end of the lower belt layer and disposed between the first carcass and the lower belt layer. A bead rubber is disposed between the other end of the sidewall rubber and the outer periphery of the first carcass around the steel wire bead.
[0005] Preferably, in the PCR low section durability tire structure, the length of the misalignment between the end of the sidewall rubber near the end of the lower belt layer and the end of the lower belt layer is 10-15 mm.
[0006] Preferably, in the PCR low section durability tire structure, a film is disposed between the outer side of the first tire carcass and the bead rubber, one end of the film passes through the sidewall rubber and extends into the sidewall rubber, and the shape of the film matches the reverse side of the first tire carcass.
[0007] Preferably, in the PCR low section durability tire structure, the triangular rubber is disposed at the bottom of the bead, and the steel wire bead is formed by multiple single steel wires wound together; the end point of the second tire carcass reverse wrapping is 10-15mm higher than the steel wire bead.
[0008] Preferably, in the PCR low-section durability tire structure, the height of the triangular rubber is 10-35mm.
[0009] Preferably, in the PCR low section durability tire structure, the end of the first tire carcass wrapping extends beyond one end of the lower belt layer and to the edge of the lower belt layer, and the misalignment length between the end of the first tire carcass wrapping and the end of the lower belt layer is 15-25 mm.
[0010] Preferably, in the PCR low section durability tire structure, a crown belt is also provided between the lower belt layer and the tread.
[0011] Preferably, the PCR low section durability tire structure is a PCR tire with an aspect ratio ≤ 45.
[0012] The beneficial effects of this utility model are: (1) The PCR low cross section durability tire structure of this utility model, by setting the end point of the first tire body to pass through the edge of the lower belt layer, and by reasonably distributing the end points of the first tire body, the end points of the second tire body, the end points of the sidewall rubber, and the end points of the triangular rubber on the tire sidewall, avoids tire stress concentration, improves tire durability, and extends tire service life. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation
[0014] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "inner" and "outer", "upper" and "lower", "front" and "back" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0016] Example 1 like Figure 1A PCR low section durability tire structure includes a bead and a carcass. The bead includes a triangular rubber 8 and a steel wire ring 5 disposed at the bottom of the triangular rubber 8. A lower belt layer 1 is disposed on the upper side of the carcass. The carcass includes a first carcass 6 and a second carcass 7. The first carcass 6 wraps around the bead and extends to the edge of the lower belt layer 1. The second carcass 7 wraps around the steel wire ring 5. The first carcass 6 is disposed on the outer periphery of the second carcass 7. A tread 9 is disposed on the upper side of the lower belt layer 1. A sidewall structure is disposed on the outer side of the carcass. The sidewall structure includes a sidewall rubber 2 and a bead rubber 4. The sidewall rubber 2 is disposed on the outer side of the first carcass 6. One end of the sidewall rubber 2 is offset from the end of the lower belt layer 1 and disposed between the first carcass 6 and the lower belt layer 1. A bead rubber 4 is disposed between the other end of the sidewall rubber 2 and the outer periphery of the first carcass 6 of the steel wire ring 5.
[0017] The length of the misalignment between the end of the sidewall rubber 2 near the end of the lower belt layer 1 and the end of the lower belt layer 1 is 10-15mm; a rubber sheet 3 is provided between the outer side of the first tire body 6 and the bead rubber 4, one end of the rubber sheet 3 passes through the sidewall rubber 2 and extends into the sidewall rubber 2, and the shape of the rubber sheet 3 matches the reverse side of the first tire body 6.
[0018] The triangular rubber 8 is located at the bottom of the tire bead, and the steel wire ring 5 is made of multiple single steel wires wound together; the end point of the second tire body 7 is 10-15mm higher than the steel wire ring 5; the height of the triangular rubber 8 is 10-35mm.
[0019] The end of the first carcass 6 that is reversed extends beyond one end of the lower belt layer 1 and reaches the edge of the lower belt layer 1. The length of the misalignment between the end of the first carcass 6 that is reversed and the end of the lower belt layer 1 is 15-25 mm. A crown belt 10 is also provided between the lower belt layer 1 and the tread 9.
[0020] The PCR low section durability tire structure is the PCR tire series with an aspect ratio ≤ 45, where the aspect ratio is the ratio of section height to section width.
[0021] The purpose of placing the film 3 between the first tire body 6 and the ferrule 4 in this invention is to prevent the tire body from bulging due to heat.
[0022] In traditional designs, the tread end point, bead rubber end point, first carcass 6 end point, and triangular rubber end point are too concentrated, and the height misalignment between the first carcass 6 end point and the triangular rubber 8 is less than 10-15mm. This utility model designs the first carcass 6 end point to be staggered from the triangular rubber end point, tread end point, and bead rubber end point, and attaches a rubber sheet to the bead rubber to prevent heat bulging, which greatly reduces the stress concentration on the tire sidewall, thereby improving the tire's performance and durability.
[0023] Taking the 305 / 30R26 specification as an example, the durability of the embodiments of this utility model and conventional tire structures are compared, and the results are shown in Table 1.
[0024] Table 1
[0025] As can be seen from the test results in Table 1, the test results of the conventional tire structure show that the tire delamination and bulging occurs, and the durability can only reach 41h. However, the test results of the embodiment of this utility model show that the tire is intact for 74h, which fully meets the stringent requirements.
[0026] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A tyre structure with low profile durability by PCR, characterized in that, The tire includes a bead and a carcass. The bead includes a triangular rubber ring (8) and a wire ring (5) disposed at the bottom of the triangular rubber ring (8). A lower belt layer (1) is disposed on the upper side of the carcass. The carcass includes a first carcass (6) and a second carcass (7). The first carcass (6) wraps around the bead and extends to the edge of the lower belt layer (1). The second carcass (7) wraps around the wire ring (5). The first carcass (6) is disposed on the outer periphery of the second carcass (7). The lower belt layer... A tread (9) is provided on the upper side of the layer (1). A sidewall structure is provided on the outer side of the tire body. The sidewall structure includes a sidewall rubber (2) and a bead rubber (4). The sidewall rubber (2) is provided on the outer side of the first tire body (6). One end of the sidewall rubber (2) is misaligned with the end of the lower belt layer (1) and is provided between the first tire body (6) and the lower belt layer (1). The other end of the sidewall rubber (2) is provided between the bead rubber (4) and the first tire body (6) around the outer periphery of the wire bead (5).
2. Tyre structure with PCR low profiled durability according to claim 1, characterized in that, The length of the misalignment between the end of the sidewall rubber (2) near the lower belt layer (1) and the end of the lower belt layer (1) is 10-15 mm.
3. Tyre structure with PCR low profiled durability according to claim 1, characterized in that, A film (3) is provided between the outer side of the first tire body (6) and the ferrule (4). One end of the film (3) passes through the sidewall rubber (2) and extends into the sidewall rubber (2). The shape of the film (3) matches the reverse side of the first tire body (6).
4. The low profile, durable tire structure of claim 1, wherein, The triangular rubber (8) is located at the bottom of the tire bead, and the wire bead (5) is made of multiple single wires wound together; the end of the second tire body (7) is 10-15mm higher than the wire bead (5).
5. The low profile, durable tire structure of claim 1, wherein, The height of the triangular adhesive (8) is 10-35mm.
6. The low profile, durable tire structure of claim 1, wherein, The end of the first tire carcass (6) that is reversed extends beyond one end of the lower belt layer (1) and extends to the edge of the lower belt layer (1). The length of the misalignment between the end of the first tire carcass (6) that is reversed and the end of the lower belt layer (1) is 15-25 mm.
7. The low profile, durable tire structure of claim 1, wherein, A crown belt (10) is also provided between the lower belt layer (1) and the tread (9).
8. The low profile, durable tire structure of claim 1, wherein, PCR low section durability tire structure is the PCR tire series with an aspect ratio ≤45.