Combined maintenance-free tire

Abstract

The utility model discloses a combined maintenance-free tire which comprises an outer tire, an inner tire and a rim, the outer tire comprises a rubber layer, a cord fabric layer and a tire bead steel wire, and pattern grooves are formed in the contact positions of the rubber layer and the ground and provide basic tire performance such as road holding force, drainage performance and abrasion resistance; the cord fabric layer has a binding effect on the inner tube, so that the inner tube is prevented from expanding; the tire bead steel wire enables the tire combination to be fastened on a rim, and the tire combination cannot be separated from the rim due to deformation after being used. The inner tube is of a hollow structure and can be provided with one or more cavities, and the cavities are communicated through the through holes, so that the tire combination has better buffering performance and better comfort, and meanwhile, the heat dissipation of the inner tube is better than that of a sponge inner tube.

Description

Technical Field

[0001] This utility model relates to the field of tires, and in particular to a combined maintenance-free tire. Background Technology

[0002] Tires are elastic rubber products that are mounted on various vehicles or machinery and come into contact with the ground for rolling. They bear weight, cushion road impacts, make contact with the road surface, and provide driving and braking forces. Tires are subjected to various deformations, loads, forces, and high and low temperatures during driving, therefore they must have high load-bearing capacity, traction capacity, and cushioning capacity.

[0003] Since Dunlop invented the pneumatic tire more than 100 years ago, tire technology has continued to develop. Traditional pneumatic tires are supported by high-pressure air, which provides excellent comfort and cushioning, making them suitable for high-speed driving. However, they have disadvantages such as being easily punctured and prone to slow leaks that require timely inflation.

[0004] In recent years, with the development of slow-speed, short-distance travel vehicles such as electric bicycles and scooters, especially the emergence of shared bicycles and shared electric bicycles, tire leaks during use can seriously affect the user experience and increase maintenance costs. To solve the problem of tire leaks, most shared bicycles and shared electric bicycles use solid tires, hollow tires, or other non-pneumatic tires, or use foam tires instead of inner tubes, achieving the effect of not needing to inflate and requiring no maintenance.

[0005] Solid tires are not accepted by the market because of their poor comfort, although they are durable. Hollow tires improve comfort because of their hollow structure, but the tire body is made of only one material, usually rubber. When in use, they are fitted to the rim by the elasticity of the rubber. Because polymer materials have a large permanent deformation rate, after a period of use, the fit between the tire and the rim will become less and less tight. In severe cases, the tire may come off the rim during driving, causing an accident.

[0006] Because of the constraint of the outer tire, the structure of foam inner tubes will not come off the rim. Foam inner tubes are usually made of polymer materials and the tire body is relatively soft. Otherwise, they would lack comfort like solid tires. Therefore, they deform greatly and generate a lot of heat during use. The heat in the center of the inner tube body is not easy to dissipate. Due to the heat accumulation effect, it will exceed the temperature resistance limit of the material, and the molecular chains will break, resulting in tire damage. Utility Model Content

[0007] The purpose of this invention is to design a modular maintenance-free tire to solve the aforementioned problems. The inner tube uses a hollow tire structure. By adjusting the size and position of the internal hollow tire cavity, the product achieves suitable comfort and heat generation, preventing tire damage due to heat generation. The hollow tire is installed inside the matching outer tire to provide support. The binding effect of the outer tire's ply layer structure prevents the tire from coming off the bead due to material deformation after use. Furthermore, because of the modular structure, different materials can be used for different parts. For example, the outer tire can focus more on anti-skid and wear-resistant properties, while the hollow tire can focus on comfort and heat resistance.

[0008] This utility model achieves the above objectives through the following technical solutions:

[0009] This utility model provides a combined maintenance-free tire, including an outer tire, an inner tube, and a rim. The outer tire has a rubber layer, a ply layer, and a bead wire, arranged from the outside in. The rubber layer has tread grooves at the contact points with the ground, providing basic tire performance such as grip, water drainage, and wear resistance. The ply layer restrains the inner tube, preventing it from expanding. The bead wire secures the tire assembly to the rim, preventing it from coming off the bead due to deformation after use. The inner tube has a hollow structure with one or more circumferentially distributed cavities. These cavities are connected by through holes, giving the tire assembly better cushioning performance and comfort, while also providing better heat dissipation than a sponge inner tube.

[0010] As a preferred embodiment of this invention, the fabric layer includes a first fabric layer and a second fabric layer with different widths.

[0011] As a preferred embodiment of this invention, the inner tube is also provided with a vulcanization air inlet to connect the cavity with the outside world for vulcanization air intake.

[0012] The beneficial effects of this utility model are as follows: This utility model improves the shortcomings of ordinary tires, is more comfortable than solid tires, will not come off the bead than hollow tires, generates less heat and dissipates heat faster than foam inner tubes, and is not easily damaged by high temperatures. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of a combined maintenance-free tire according to the present invention.

[0014] Figure 2 This is a schematic diagram of the outer tire cross-section structure of Embodiment 1 of the present invention, which is a combined maintenance-free tire.

[0015] Figure 3 This is a schematic diagram of the outer tire cross-section structure of Embodiment 2 of the present invention, which is a combined maintenance-free tire.

[0016] Figure 4This is a schematic diagram of the cross-sectional structure of the inner tube of a combined maintenance-free tire according to this utility model.

[0017] Figure 5 This is a schematic diagram of the rim structure of a combined maintenance-free tire according to the present invention.

[0018] In the diagram: 1-Outer tire, 2-Inner tire, 3-Rubber layer, 4-Cord layer one, 5-Cord layer two, 6-Bead wire, 7-Tread groove, 8-Cavity, 9-Through hole, 10-Vulcanized air inlet, 11-Rim. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" 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 utility model according to the specific circumstances.

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] Example 1

[0027] As attached Figure 1-3 As shown in Figure 5, this embodiment provides a combined maintenance-free tire, including an outer tire 1, an inner tube 2, and a rim 11. The outer tire 1 includes a rubber layer 3, a cord layer, and a bead wire 6, arranged from the outside to the inside as a rubber layer 3 and a cord layer. The rubber layer 3 has tread grooves 7 at the contact point with the ground, and a bead wire 6 at the mating point between the outer tire 1 and the rim 11. The cord layer includes two cord layers, a first cord layer 4 and a second cord layer 5, with a width difference of not less than 5 mm. The two ends of the cord layer are wrapped around the bead wire 6, with the wrapping height exceeding the bead wire 6 by not less than 5 mm, thereby forming a stable skeleton structure and restricting the stretching of the cord layer. The rubber layer 3, the first cord layer 4, the second cord layer 5, and the bead wire 6 are combined together through a rubber vulcanization process to form the outer tire 1. The inner tube 2 is designed according to the inner contour shape and size of the outer tire 1. After being installed in the outer tire 1, there is no gap between the inner tube 2 and the outer tire 1. There may be a gap between the inner tube 2 and the rim 11. The inner tube 2 may have one or more circumferentially distributed cavities 8. When the inner tube 2 has multiple cavities 8, one or more through holes 9 connect the cavities 8 to each other, so that the pressure in each cavity 8 is consistent during vulcanization. There is also a vulcanization air inlet 10 connecting the cavity 8 to the outside world for vulcanization air intake. To provide better support, the wall thickness of the inner tube 2 is not less than 3mm.

[0028] Example 2

[0029] As attached Figure 1-2As shown in Figures 4-5, this embodiment provides a combined maintenance-free tire, including an outer tire 1, an inner tube 2, and a rim 11. The outer tire 1 includes a rubber layer 3, a cord layer, and a bead wire 6. From the outside to the inside, the outer tire 1 consists of a rubber layer 3 and a cord layer. The rubber layer 3 has tread grooves 7 at the contact point with the ground. The outer tire 1 has a bead wire 6 at the mating point with the rim 11. The cord layer consists of only one cord layer 4. The cord layer 4 is covered with bead wires 6 on both sides. After being covered, the cords overlap at the center of the tire cross section, with an overlap width of not less than 20mm, thereby forming a stable skeleton structure and restricting the stretching of the cord layer. The rubber layer 3, the cord layer, and the bead wire 6 are combined together through a rubber vulcanization process to form the outer tire 1. The inner tube 2 is designed according to the inner contour shape and size of the outer tire 1. After being installed in the outer tire 1, there is no gap between the inner tube 2 and the outer tire 1. There may be a gap between the inner tube 2 and the rim 11. The inner tube 2 may have one or more circumferentially distributed cavities 8. When the inner tube 2 has multiple cavities 8, one or more through holes 9 connect the cavities 8 to each other, so that the pressure in each cavity 8 is consistent during vulcanization. There is also a vulcanization air inlet 10 connecting the cavity 8 to the outside world for vulcanization air intake. To provide better support, the wall thickness of the inner tube 2 is not less than 3mm.

[0030] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A combined maintenance-free tire, characterized in that: It includes an outer tire (1), an inner tube (2), and a rim (11). The inner tube (2) is located inside the outer tire (1) and is fixed by the cooperation of the outer tire (1) and the rim (11). The inner tube (2) has circumferentially distributed cavities (8).

2. The combined maintenance-free tire according to claim 1, characterized in that: The outer tire (1) includes a rubber layer (3), a cord layer, and a bead wire (6). From the outside to the inside, the rubber layer (3) and the cord layer are arranged in sequence. The rubber layer (3) has a tread groove (7) at the contact part with the ground. The bead wire (6) is located at the mating point between the outer tire (1) and the rim (11).

3. The combined maintenance-free tire according to claim 2, characterized in that: The cord layer includes two cord layers with different widths, one (4) and the other (5), with a width difference of not less than 5 mm. Both ends of the cord layer are covered with tire bead wire (6).

4. The combined maintenance-free tire according to claim 3, characterized in that: The height of the cord layer covering the tire bead wire (6) shall be no less than 5 mm.

5. The combined maintenance-free tire according to claim 2, characterized in that: The ply is ply layer one (4), and the bead wires (6) are wrapped on both sides of ply layer one (4). After being wrapped, they overlap at the center of the tire cross section, and the overlap width is not less than 20mm.

6. The combined maintenance-free tire according to claim 4 or 5, characterized in that: The inner tube (2) has a circumferentially distributed cavity (8).

7. The combined maintenance-free tire according to claim 4 or 5, characterized in that: The inner tube (2) has multiple circumferentially distributed cavities (8), and one or more through holes (9) are provided between each cavity (8) to make the pressure of each cavity (8) consistent during vulcanization.

8. The combined maintenance-free tire according to claim 7, characterized in that: The inner tube (2) is also provided with a vulcanization air inlet (10) to connect the cavity (8) with the outside world for vulcanization air intake.

9. The combined maintenance-free tire according to claim 8, characterized in that: The inner tube (2) has a wall thickness of not less than 3 mm.

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