Run-flat tire

Abstract

The utility model discloses a run-flat tire, which relates to the technical field of tire manufacturing and comprises an outer tire body, tread patterns are arranged on the surface of the outer tire body, a tire body reinforcing material is arranged in the outer tire body, a side reinforcing rubber layer with a crescent-shaped section is arranged on the inner side of a tire body layer at the tire side part of the outer tire body in a spanning manner, and a tire bead filler component is arranged on the side surface of the tire body reinforcing material. A bead ring component is arranged on the side face of the tire bead filler component, a belt mechanism is arranged between the outer tire body and the tire body reinforcing material, a stabilizing device is arranged on the side face of the tire bead filler component, the shore hardness of the tire bead filler component ranges from 70 degrees to 82 degrees, the thickness of the maximum broken width position accounts for 40%-60% of the total thickness, and on the basis that the run-flat function can be stably maintained, the service life of the tire is prolonged. The design is weakened as much as possible, and the bending difficulty of the side wall is reduced, so that the problem of stress concentration of the ring part caused by vulcanization die assembly can be improved, and meanwhile, the product comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire manufacturing, in particular to a run-flat tire. Background Art

[0002] Run-flat tires include sidewall-reinforced run-flat tires. The sidewalls of run-flat tires are reinforced, which makes it difficult to bend the sidewalls, resulting in stress concentration in the tire bead during vulcanization and mold closing. During the production process, it is very easy for the tire bead outer side to show lines and the rubber to be squeezed and flow abnormally. Especially in the aspect ratio 35 series with the following specifications, it is necessary to increase the thickness of the semi-component to meet the improvement requirements, which increases the tire cost and affects the shape of the tire bead. It is very easy to produce rubber edges at the bead, and trimming is very likely to damage the inner liner, which has an adverse effect on the tire's air retention.

[0003] The run-flat tire and automobile described in the patent announcement number CN219256964U include a bead reinforcement layer made of steel wire material to increase durability, and a crescent-shaped rubber to balance the high-speed performance of a conventional pneumatic tire. This run-flat tire is prone to stress concentration in the bead during the production vulcanization and mold closing process, and the outer side of the bead has visible lines and the rubber is squeezed, causing abnormal rubber flow.

[0004] Based on this, a run-flat tire is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0005] The utility model aims to provide a run-flat tire to solve the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A run-flat tire comprises an outer carcass, a tread pattern is provided on the surface of the outer carcass, a carcass reinforcement material is provided inside the outer carcass, a side reinforcement rubber layer with a crescent-shaped cross-section is spanned on the inner side of the carcass layer at the side of the tire, a bead filler component is provided on the side of the carcass reinforcement material, a wire ring component is provided on the side of the bead filler component, a belt mechanism is provided between the outer carcass and the carcass reinforcement material, and a stabilizing device is provided on the side of the bead filler component.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional solution: the belt mechanism includes a buffer belt assembly, the buffer belt assembly is arranged on the upper surface of the carcass reinforcement material, the inner layer body is arranged on the left side of the carcass reinforcement material, and the right side of the carcass reinforcement material is fixedly connected to the carcass frame.

[0010] In an optional solution: the stabilizing device includes a bead filler component laterally fixedly connected to the sidewall reinforcing layer.

[0011] In an optional solution, the angle between the maximum width point of the outer edge sidewall of the outer carcass and the maximum cross-sectional width of the cross-section at the contour converging diameter point in the outer carcass meridian direction satisfies a relationship greater than or equal to 70°.

[0012] In an optional solution, the tire bead filler component is designed to have a Shore hardness between 70° and 82°, and the thickness at the maximum cross-section width accounts for 40% to 60% of the total thickness.

[0013] In an optional solution, the sidewall reinforcement layer is made of nylon material, with an angle ranging from 20° to 60°, and an end point 3-10 mm higher than the top of the tire bead filler component 203 .

[0014] In an optional solution: the buffer belt assembly is composed of multiple layers of steel wire rubber cord fabric.

[0015] In an optional solution: an airtight layer is provided on the inner layer body.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The utility model designs the tire bead filler component with a Shore hardness between 70° and 82°, and the thickness at the maximum width accounts for 40% to 60% of the total thickness. On the basis of stably maintaining the run-flat function, the design is weakened as much as possible to reduce the bending difficulty of the side wall, which can improve the stress concentration problem of the bead caused by vulcanization mold clamping and improve the comfort of the product.

[0018] 2. The utility model reduces the bending degree of the side wall during the vulcanization and mold closing process, reduces the stress degree of the ring part, and improves the abnormal flow of the rubber material in the ring part by means of the buffer belt assembly and the side wall with a crescent-shaped cross section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic structural diagram of the outer carcass in the utility model.

[0021] Figure 3 It is a schematic structural diagram of the carcass reinforcement material of the utility model.

[0022] Figure 4 It is a schematic structural diagram of the inner layer body and the carcass frame of the utility model.

[0023] Figure 5 It is a structural schematic diagram of the tire bead filler component and the wire ring component of the utility model.

[0024] Figure 6 It is a schematic structural diagram of the sidewall reinforcement layer of the utility model.

[0025] Notes on reference numerals: 101. carcass, 102. tread pattern, 201. buffer belt assembly, 202 carcass reinforcement material, 203. bead filler component, 204. wire ring component, 301. inner layer, 302. carcass frame, 303. sidewall reinforcement layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] In one embodiment, Figure 1-Figure 3 As shown, a run-flat tire comprises an outer carcass 101, a tread pattern 102 is provided on the surface of the outer carcass 101, a carcass reinforcement material 202 is provided inside the outer carcass 101, a side reinforcement rubber layer with a crescent-shaped cross section is provided on the inner side of the carcass layer of the sidewall of the outer carcass 101, a bead filler component 203 is provided on the side of the carcass reinforcement material 202, a wire ring component 204 is provided on the side of the bead filler component 203, a belt mechanism is provided between the outer carcass 101 and the carcass reinforcement material 202, and the bead filler component 20 3. A stabilizing device is provided on the side surface, which provides protection through the outer carcass 101 and the tread pattern 102, and provides friction for the run-flat tire during movement. By providing a side reinforcement rubber layer with a crescent-shaped cross-section on the inner side of the carcass of the sidewall part of the outer carcass 101, when the tire loses air pressure or the air pressure is insufficient, the reinforced rubber layer can provide additional support, so that the tire can maintain its shape and continue to travel a certain distance, effectively preventing the tire from collapsing quickly after the air pressure is lost, and ensuring that the vehicle can still travel within a certain period of time;

[0028] In one embodiment, Figure 3 , Figure 4 and Figure 5 As shown, the belt mechanism includes a buffer belt assembly 201, which is arranged on the upper surface of the carcass reinforcement material 202, an inner layer 301 is arranged on the left side of the carcass reinforcement material 202, and the right side of the carcass reinforcement material 202 is fixedly connected to the carcass frame 302. The buffer belt assembly 201 is composed of multiple layers of steel cord fabric, which optimizes the rigidity distribution state of the run-flat tire in a decompressed state. It improves the stability and handling of the vehicle, reduces the risk of vehicle loss of control due to tire decompression, absorbs and disperses shocks and vibrations through the carcass frame 302, reduces the impact on the vehicle suspension system and ride comfort, and improves ride comfort;

[0029] In one embodiment, Figure 5 and Figure 6 As shown, the stabilizing device includes a bead filler component 203 fixedly connected to a sidewall reinforcement layer 303, and the sidewall reinforcement layer 303 strengthens the structural strength of the sidewall, thereby reducing the risk of tire bulging and rim damage caused by poor road conditions or bad driving habits. This reinforcement design makes the tire more durable and extends its service life;

[0030] In one embodiment, Figure 1 and Figure 2 As shown, the angle between the maximum width point of the outer edge sidewall of the outer carcass 101 and the maximum cross-sectional width of the cross-section of the outer carcass 101 in the meridian direction satisfies a relationship of greater than or equal to 70°. The outer carcass 101 can be used to stabilize the run-flat tire and maintain the run-flat function. The design is weakened as much as possible to reduce the bending difficulty of the sidewall, which can improve the stress concentration problem of the bead caused by vulcanization mold clamping and improve the comfort of the product.

[0031] In one embodiment, Figure 1 , Figure 5 and Figure 6 As shown, the tire bead filler component 203 is designed to have a Shore hardness between 70° and 82°, and the thickness at the maximum width accounts for 40% to 60% of the total thickness. The tire bead filler component 203 reduces the difficulty of sidewall bending during vulcanization and mold closing, reduces the stress on the bead, and improves the ride comfort of the finished tire.

[0032] In one embodiment, Figure 6 As shown, the sidewall reinforcement layer 303 is made of nylon material, with an angle range of 20° to 60°, and an end point 3-10 mm higher than the top of the bead filler component 203. The bead is bound by the sidewall reinforcement layer 303 to improve the bead support strength, while reducing the design thickness of the bead filler, making the sidewall bending easier, reducing the stress level of the bead, and reducing the abnormal flow of rubber.

[0033] The above embodiment discloses a run-flat tire, wherein a protective effect is provided by the outer carcass 101 and the tread pattern 102, and friction is provided for the movement of the run-flat tire. The angle between the maximum width point of the sidewall at the outer edge of the outer carcass 101 and the maximum cross-sectional width of the contour joint diameter point in the meridian direction of the outer carcass 101 satisfies a relationship greater than or equal to 70°, so that the run-flat tire can weaken the design as much as possible on the basis of maintaining the run-flat function, and reduce the bending difficulty of the sidewall. This can improve the stress concentration problem of the ring part caused by vulcanization mold closing, and at the same time improve the comfort of the product. By arranging a side reinforcement rubber layer with a crescent-shaped cross-section on the inner side of the carcass in the sidewall part of the outer carcass 101, when the tire loses air pressure or the air pressure is insufficient, the reinforced rubber layer can provide additional support force, so that the tire can maintain its shape and continue to travel a certain distance. The buffer belt assembly 201 is composed of multiple layers of steel cord fabric, and the rigidity distribution state of the run-flat tire in a depressurized state is optimized. Improve the stability and controllability of the vehicle, reduce the risk of vehicle loss of control due to tire pressure loss, absorb and disperse shock and vibration through the carcass frame 302, reduce the impact on the vehicle suspension system and ride comfort, improve ride comfort, strengthen the structural strength of the sidewall through the sidewall reinforcement layer 303, and reduce the risk of tire bulge and rim damage caused by poor road conditions or bad driving habits. This reinforced design makes the tire more durable and extends its service life. The sidewall reinforcement layer 303 is made of nylon material, with an angle range of 20° to 60°, and the end point is 3-10mm higher than the top of the bead filler component 203. The bead is bound by the sidewall reinforcement layer 303 to improve the support strength of the bead, while reducing the design thickness of the bead filler, making it easier to bend the sidewall, reducing the stress level of the bead, and reducing the abnormal flow of rubber.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A run-flat tire, comprising an outer carcass (101), a tread pattern (102) being provided on the surface of the outer carcass (101), a carcass reinforcement material (202) being provided inside the outer carcass (101), a side reinforcement rubber layer having a crescent-shaped cross section being provided on the inner side of the carcass layer of the sidewall of the outer carcass (101), a bead filler component (203) being provided on the side of the carcass reinforcement material (202), and a wire ring component (204) being provided on the side of the bead filler component (203), wherein: It also includes a belt mechanism provided between the outer carcass (101) and the carcass reinforcement material (202), and a stabilizing device provided on the side of the tire bead filler component (203).

2. A run-flat tire according to claim 1, characterized in that: The belt mechanism comprises a buffer belt assembly (201), the buffer belt assembly (201) is arranged on the upper surface of the carcass reinforcement material (202), the inner layer (301) is arranged on the left side of the carcass reinforcement material (202), and the right side of the carcass reinforcement material (202) is fixedly connected to the carcass frame (302).

3. A run-flat tire according to claim 1, characterized in that: The stabilizing device comprises a tire bead filler component (203) laterally fixedly connected to a tire sidewall reinforcing layer (303).

4. A run-flat tire according to claim 1, characterized in that: The angle between the maximum width point of the outer edge sidewall of the outer carcass (101) and the maximum cross-sectional width of the profile joint diameter point in the meridian direction of the outer carcass (101) satisfies a relationship greater than or equal to 70 degrees.

5. The run-flat tire according to claim 1, characterized in that: The tire bead filler component (203) is designed to have a Shore hardness between 70° and 82°, and the thickness at the maximum breaking width accounts for 40% to 60% of the total thickness.

6. A run-flat tire according to claim 3, characterized in that: The tire side reinforcement layer (303) is made of nylon material, has an angle range of 20° to 60°, and an end point is 3-10 mm higher than the top of the tire bead filler.

7. A run-flat tire according to claim 2, characterized in that: The buffer belt assembly (201) is composed of multiple layers of steel cord fabric.

8. The run-flat tire according to claim 2, characterized in that: An airtight layer is provided on the inner layer body (301).

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