Puncture-resistant pneumatic tire
By setting a sealed foam layer and a crosslinking layer on the inner wall of the tire body, the problem of air dissipation caused by piercings by pneumatic tires is solved, which improves the anti-puncture ability and safety of use, while maintaining the light weight of the tire and Convenience in production.
Patent Information
- Application Number
- CN202421162855.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-24
AI Technical Summary
Ordinary inflatable rubber tires are prone to deflated due to piercings. In the prior art, the crown and side walls are the weakest parts, resulting in frequent deflation.
The sealing foam layer is arranged on the inner wall of the tire body, and the sealing foam layer is combined with the inner surface of the carcass to form a cross-linking layer to ensure the independence of the foam cells, increase the effective wall thickness, and arrange the sealing foam layer in the easily pierced parts, using rubber Plastic foam materials to improve resistance to thorns.
Effectively prevent the dissipation problems caused by puncture of most pointed substances, maintain the safety, comfort and grip of the tires, while reducing production costs.
Smart Images
Figure CN222246718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rubber tires, in particular to a puncture-resistant pneumatic tire. Background Art
[0002] The deflation problem of ordinary pneumatic rubber tires has always been a technical problem that needs to be solved in the tire industry. In response to this, the tire industry is developing and producing various new tires, such as airless tires, run-flat tires, self-hydrating tires, wire-reinforced tires, weighted tires, etc., in order to avoid the problem that pneumatic tires are easily deflated and cannot be used normally. However, ordinary pneumatic tires also have their advantages. Compared with ordinary pneumatic tires, the above-mentioned various tires have disadvantages such as heavy tires, complex processing, high production costs, uncomfortable riding, and poor grip, which are not accepted by the majority of consumers.
[0003] In addition to the quality of the tire itself, tire deflation is mainly caused by being punctured by sharp objects. After a lot of market research, it is found that most of the sharp objects that puncture tires are metal objects such as nails, and most of the sharp objects are about 20mm. The parts of the tire punctured by sharp objects are mostly in the crown of the tire and the two side walls near the crown. The bottom of the pattern of the crown of the tire and the sidewall of the tire in the existing technology are the weakest parts of the tire structure. Therefore, the problem of tires being punctured by sharp objects often occurs, resulting in tire deflation. Utility Model Content
[0004] Based on the above problems, the purpose of the utility model is to provide a puncture-resistant pneumatic tire, which retains the advantages of pneumatic tires while improving the pneumatic tires to enhance the puncture resistance of the pneumatic tires and make them less prone to deflation.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A puncture-resistant pneumatic tire comprises a tire carcass, wherein an inflation cavity is arranged inside the tire carcass, a sealing foam layer is arranged inside the inflation cavity, foaming holes in the sealing foam layer are independent of each other, the sealing foam layer is composited with the inner surface of the tire carcass as a whole, and a cross-linking layer is formed between the sealing foam layer and the tire carcass, and the shortest distance from the outer wall of the tire carcass to the inner wall of the sealing foam layer is greater than 20 mm.
[0007] Optionally, the sealing foam layer is located on the inner surface of the tire carcass corresponding to the outer surface crown of the tire carcass and the two sides of the carcass.
[0008] Optionally, the sealing foam layer covers part or all of the inner surface of the tire carcass.
[0009] Optionally, a skinning layer is provided on the exposed surface of the sealing foaming layer.
[0010] Optionally, the thickness of the crusting layer is 0.1 mm to 5 mm.
[0011] Optionally, the thickness of the sealing foam layer is 10 mm to 150 mm.
[0012] Optionally, the sealing foam layer is made of rubber-plastic foam material.
[0013] The beneficial effects of the utility model are as follows: the puncture-resistant pneumatic tire adds a sealing foam layer on the inner wall of the tire carcass to increase the effective wall thickness of the tire, so that the tire can resist being punctured by most sharp objects during use; and the sealing foam layer is light in weight and can be easily integrated with the tire carcass, and is suitable for ordinary pneumatic tires of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic structural diagram of a puncture-resistant pneumatic tire provided by an embodiment of the utility model.
[0015] In the attached figure:
[0016] 1. Tire carcass; 2. Inflation cavity; 3. Sealing foaming layer; 4. Cross-linking layer; 5. Skinning layer. DETAILED DESCRIPTION
[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a composite vulcanization connection; it can also be a detachable connection, or an integral connection; it can be an adhesive connection, a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0020] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0021] See also Figure 1 As shown, the preferred embodiment provides a puncture-resistant pneumatic tire, including a tire carcass 1, an inflation cavity 2 is arranged inside the tire carcass 1, a sealing foam layer 3 is arranged in the inflation cavity 2, the foaming holes in the sealing foam layer 3 are independent of each other, the sealing foam layer 3 is composited with the inner surface of the tire carcass 1, and a cross-linking layer 4 is formed between the sealing foam layer 3 and the tire carcass 1, and the shortest distance from the outer wall of the tire carcass 1 to the inner wall of the sealing foam layer 3 is greater than 20 mm.
[0022] Therefore, the puncture-resistant pneumatic tire adds a sealing foam layer 3 on the inner wall of the tire carcass 1 to increase the effective wall thickness of the tire, so that the tire can resist being punctured by most sharp objects during use. The sealing foam layer 3 is light in weight and can be easily combined with the tire carcass 1 as a whole, and is suitable for ordinary pneumatic tires of various specifications.
[0023] As an optional solution, the sealing foam layer 3 is located on the inner surface of the tire carcass 1 corresponding to the outer surface crown and both sides of the tire carcass 1. The sealing foam layer 3 is arranged according to the easily punctured parts of the tire to control the usage of the sealing foam layer 3.
[0024] As another optional solution, the sealing foam layer 3 covers part or all of the inner surface of the tire carcass 1 according to the size of the tire. This has the advantage of helping to adjust the thickness of the tire sidewall to be uniform. Figure 1 As shown, the tire is puncture-resistant at all locations.
[0025] Specifically, a crusting layer 5 is provided on the exposed surface of the sealing foaming layer 3, and the crusting layer 5 is used to improve the sealing performance of the inflation cavity 2. Further, the thickness of the crusting layer 5 is 0.1 mm to 5 mm, and 1 mm is used as an example in this embodiment.
[0026] As an optional solution, the thickness of the sealing foam layer 3 is set to 10mm to 150mm according to the size of the tire. In view of the fact that most sharp objects are about 20mm long, it is only necessary to ensure that the effective wall thickness of the tire is greater than 20mm to effectively avoid deflation caused by puncture.
[0027] As an optional solution, the sealing foam layer 3 here is made of rubber-plastic foam material, using closed-cell foaming agent or microsphere expansion technology, and the foaming holes are independent of each other and do not communicate with each other, ensuring that when sharp objects pierce the sealing foam layer 3, there will be no air leakage due to the interconnected holes. In addition, other lightweight foam materials can also be used as the foam layer 3.
[0028] Specific production process:
[0029] The prefabricated sealing foam layer 3 is compounded with the inner wall of the tire carcass 1, and after vulcanization at a temperature of 150 (± 10) ° C, the sealing foam layer 3 and the inner surface rubber layer of the tire carcass 1 are organically cross-linked together to ensure that they will not separate or peel off during long-term use; during vulcanization, after the foaming temperature of the foaming agent in the sealing foam layer 3 is reached, the sealing foam layer 3 completes foaming, and finally the wall thickness of the inflatable tire is effectively increased. Even if sharp objects pierce the sealing foam layer 3, it will not affect the normal use of the tire, and the safety, comfort, grip, endurance, etc. of the tire are all guaranteed.
[0030] In addition, if the crusting layer 5 on the surface of the sealing foam layer 3 is punctured by a longer sharp object, due to the compatibility of rubber and plastic materials, the tire can also be repaired in the normal way of rubber tire repair. The repaired tire does not affect its normal use and its puncture resistance performance.
[0031] The above embodiments are only to illustrate the basic principles and characteristics of the utility model. The utility model is not limited by the above embodiments. Without departing from the spirit and scope of the utility model, the utility model has various changes and modifications, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A puncture-resistant pneumatic tire, comprising a tire carcass (1), wherein an inflation cavity (2) is provided inside the tire carcass (1), characterized in that: A sealing foam layer (3) is provided in the inflation cavity (2), the foaming holes in the sealing foam layer (3) are independent of each other, the sealing foam layer (3) is composited with the inner surface of the tire carcass (1) to form a whole, and a cross-linking layer (4) is formed between the sealing foam layer (3) and the tire carcass (1), and the shortest distance from the outer wall of the tire carcass (1) to the inner wall of the sealing foam layer (3) is greater than 20 mm.
2. The puncture-resistant pneumatic tire according to claim 1, characterized in that: The sealing foam layer (3) is located on the inner surface of the tire carcass (1) and corresponds to the outer surface crown and both sides of the tire carcass (1).
3. The puncture-resistant pneumatic tire according to claim 1, characterized in that: The sealing foam layer (3) covers part or the entire inner surface of the tire carcass (1).
4. The puncture-resistant pneumatic tire according to claim 2 or 3, characterized in that: The exposed surface of the sealing foam layer (3) is provided with a skinning layer (5).
5. The puncture-resistant pneumatic tire according to claim 4, characterized in that: The thickness of the crusting layer (5) is 0.1 mm to 5 mm.
6. The puncture-resistant pneumatic tire according to claim 1, characterized in that: The thickness of the sealing foam layer (3) is 10 mm to 150 mm.
7. The puncture-resistant pneumatic tire according to claim 1, characterized in that: The sealing foam layer (3) is made of rubber-plastic foam material.