WO2023000605A1

WO2023000605A1 - Run-flat tire

Info

Publication number: WO2023000605A1
Application number: PCT/CN2021/139491
Authority: WO
Inventors: 李建军
Original assignee: 李建军
Priority date: 2021-07-23
Filing date: 2021-12-20
Publication date: 2023-01-26
Also published as: CN215321804U

Abstract

The present application discloses a run-flat tire, comprising a wheel hub and an outer tire mounted on the wheel hub. An inner tube is mounted in the outer tire, and the inner tube is composed of a plurality of honeycomb airbags. The honeycomb airbags are made of elastic rubber, and any honeycomb airbag is connected to a branch air pipe used for inflating the honeycomb airbag. The branch air pipes communicate with a main air pipe, and a free end of the main air pipe is tightly connected to an air nozzle mounted on the wheel hub. Check valves which prevent gas from escaping are further provided on the branch air pipes or in the honeycomb airbags. In the present utility model, the inner tube is redesigned on the basis of existing ordinary tires in combination with the form of traditional tires, the original single inner tube is arranged as a multi-honeycomb airbag structure, and the principle that adjacent honeycomb airbags are able to achieve self-adaptive filling is used, so that damage to and air leakage of a portion of the honeycomb airbags will not cause the entire tire to leak air or blowout. Also, the inner tube may be compatible with the tires of existing bicycles, battery-powered vehicles, and automobiles, and has low maintenance costs, is highly safe, and has strong practicability and popularization.

Description

A kind of run-flat tire

technical field

The utility model relates to the field of tires, in particular to anti-puncture and explosion-proof tires, in particular to an explosion-proof tire.

Background technique

About 90% of the used tires of existing means of transportation are tubeless tires, and 10% are tires in the traditional combination of inner and outer tires. Tubeless tires are widely used due to their high pressure resistance, good airtightness, and convenient installation. The most prominent advantage is that after the tubeless tire is punctured by a foreign object, it can firmly wrap the foreign object due to its thicker tire wall. The high-pressure air in the tire will not escape instantly, avoiding serious traffic accidents caused by the instantaneous loss of pressure of the tire.

In the prior art, a run-flat tire, commonly known as a run-flat tire, is designed to avoid accidents such as vehicle overturn caused by the vehicle balance being broken due to the instantaneous pressure loss of the tire, which is generally used in high-end luxury cars. The principle is to thicken the sidewall of the tire on the basis of the existing tubeless tire, and in time the tire is punctured by a foreign object, causing the tire to lose pressure instantly. Due to the large thickness of the tire sidewall, the rubber that relies on the large thickness of the tire itself can still Support the car to drive about 100km at a speed not higher than 80km/h, so that after the car tire is punctured, it can safely drive to the nearest maintenance point under the condition of zero tire pressure. Although the advantages of this run-flat tire are very prominent, there are also obvious disadvantages, mainly including: one, the tire noise during the running of the car is relatively large, and the comfort level is low. Second, when the tire passes over the pothole, because the sidewall is too thick, there is not enough space for avoidance, which can easily cause the cord curtain of the tire sidewall to break, making the run-flat tire extremely easy to damage, especially the flatter it is The tires are more likely to break, and the flat tires on the market are very expensive, which makes the use cost increase sharply.

In order to solve the above problems, there is an urgent need for a tire that has the adaptability of ordinary tires to poor road conditions, and can not instantly cause the tire to lose pressure and cause the vehicle to lose control after being punctured by a foreign object.

Utility model content

In order to solve the problems existing in existing tires such as the ordinary tire blowout described in the background technology, which easily leads to instant loss of control of the vehicle, the run-flat tire has weak anti-collision ability, large tire noise, and high cost of use, the application provides an explosion-proof The tire, on the basis of the existing ordinary tire, combined with the traditional tire form, adds the inner tube design again, so that the tire can take into account the anti-bump and anti-knock ability of the ordinary tire at the same time, and can continue to maintain the original tire after the tire is punctured. Continue to drive in a state to avoid the problem that the tire loses pressure instantly and causes the car to lose control.

In order to achieve the above object, the technical scheme adopted in this application is:

An explosion-proof tire, comprising a wheel hub, a tire mounted on the hub, an inner tire is installed inside the tire, the inner tire is composed of a plurality of honeycomb airbags, and the honeycomb airbags are made of elastic rubber, and any honeycomb airbags are connected and useful For the bronchi that inflate into the honeycomb airbag, any bronchus is connected with the main trachea, and the free end of the main trachea is airtightly connected with the air nozzle installed on the hub; One-way valve for gas escape.

Brief description of the working and structural principles: the wheel hub and the outer tire are nested with each other, and the outer tire and the wheel hub are squeezed and fixed together by air pressure. Or non-sealed are all possible. The contact seal is adopted between the tubeless tire and the wheel hub of existing cars on the market, but the high pressure tires equipped with inner tubes, such as the tires of buses and large trucks, are not sealed between the outer tire and the hub, and only play the role of anti-corrosion. The role of pressure support. In the above structure, whether there is a seal between the hub and the tire does not affect the normal use of the tire. The difference between the inner tube and the existing high-pressure inner bag is that the inner tube in the utility model contains a plurality of independently inflated honeycomb airbags, the gas between the honeycomb airbag and another honeycomb airbag cannot communicate with each other, and the gas can only be unidirectional. Into any honeycomb airbag, when the honeycomb airbag is complete, the gas cannot escape from the honeycomb airbag automatically. The main air pipe is connected to the air nozzle installed on the hub. When inflating is required, the gas is passed through the main air pipe and multiple bronchi connected to the main air pipe in turn through the air nozzle, and then the gas is inflated into the honeycomb airbag through the one-way valve. Among them, because the honeycomb airbag has strong plasticity and elastic deformation ability, therefore, in the inflated state, the honeycomb airbag can adaptively fill the cavity between the entire wheel hub and the tire, so that the pressure inside the entire tire is uniform , but when some local honeycomb airbags are damaged and leak due to external force or hard object puncture, the adjacent honeycomb airbags will expand adaptively to occupy the original space of the leaky honeycomb airbags, so that the overall air pressure of the tire can still be maintained up to fairly level. The smaller the space occupied by a single honeycomb airbag, the slightly lower the air pressure of the entire tire, and vice versa. Adopting the structure provided with the above-mentioned multi-honeycomb airbags can avoid the serious consequences caused by partial air leakage in the prior art resulting in the overall loss of pressure of the tire, or even a tire blowout. In addition, the use of multi-honeycomb airbag structure makes the sidewall of the tire no different from the existing ordinary tire, and the thickness of the sidewall will be much thinner than that of the existing run-flat tire, so that when passing through potholes, It is not easy to cause extrusion between the ground and the wheel hub, cause the cord curtain in the tire to break and cause the tire to be scrapped, thereby greatly reducing the tire use cost.

In order to further facilitate the installation of the inner tube and eliminate the pressure difference, so that the cavity pressure between the entire outer tire and the hub is uniform, preferably, the inner tube is composed of a plurality of longitudinally arranged honeycomb airbag units, and the inner tube has a rectangular parallelepiped structure as a whole. In the cavity formed by the outer tire and the hub; any side wall of the inner tire is connected with the main air pipe, and the bronchus is arranged between two adjacent honeycomb airbag units.

Preferably, the honeycomb airbag unit is composed of a plurality of horizontally arranged honeycomb airbags.

Further preferably, the one-way valve is a duckbill-type one-way valve made of silica gel or silicone rubber, and the duckbill-type one-way valve includes two pieces of silica gel that are attached to each other for one-way flow of gas. The shape of the duckbill one-way valve is wedge-shaped, and it has two upper and lower soft silica gel sheets that are attached to each other. The side walls of the two silica gel sheets are integrally connected along the length direction. , the end of the duckbill check valve close to the honeycomb airbag is attached to each other in the natural state. When the gas passes through, it will easily push the two pieces of silica gel, so that the gas enters the honeycomb airbag; when the honeycomb airbag When the internal pressure is higher than the external pressure of the honeycomb airbag, because the one-way valve is designed in a duckbill shape, the two silicone sheets will be under greater pressure, so that the two silicone sheets are tightly squeezed together, and the pressure inside the honeycomb airbag will The larger the size, the tighter the silicone sheet is squeezed, so the sealing effect is better, and the problem of air leakage and outgassing during use can be avoided.

In order to make the air pressure distribution inside the tire more uniform, the center of gravity of the tire more uniform, and reduce the tire noise during driving, preferably, the inner tube is composed of a first section, a middle section and a tail section, and the transverse width of the first section is smaller than that of the tail section , the transverse width of the tail section is smaller than the transverse width of the middle section, the longitudinal length of the first section accounts for 10%-13% of the total longitudinal length of the inner tube, and the longitudinal length of the middle section accounts for 75% of the longitudinal length of the inner tube -80%, the remainder is the longitudinal length of the tail section. The purpose of adopting the above-mentioned structural design is to satisfy the internal structure of the existing wheel hub and tire, make it compatible with the wheel hub and tire of the existing automobile, and can be directly applied in the existing automobile tire, thereby making the utility model practical and usable The degree of promotion becomes wider and is not limited by the structure of existing automobile tires and hubs. At the same time, it can also be applied to small tires with light loads, such as bicycles, battery cars, motorcycles, etc. It is worth noting that the above-mentioned structural arrangement is only an optimized design scheme, and will not cause any restriction or restriction on the reliable realization of the utility model.

Beneficial effect:

The utility model redesigns the inner tube on the basis of the existing common tire, combined with the traditional tire form, sets the original single inner tube into a multi-honeycomb airbag structure, and uses the principle of self-adaptive filling of adjacent honeycomb airbags. Partial honeycomb airbags will not cause air leakage or puncture of the entire tire after the partial honeycomb airbag is damaged, so that the tire can take into account the anti-bump and anti-collision capabilities of ordinary tires, and can continue to maintain the original tire after the tire is punctured. The state continues to drive, avoiding the problem that the tire loses pressure instantaneously and causes the car to lose control.

Furthermore, the inner tube structure provided by the utility model can be applied to existing tires of various types, and is theoretically not affected by the flatness of the tire, and has no requirement for the sealing between the tire and the hub, and has strong adaptability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is the axonometric view of the utility model applied on the tire with high flatness.

Fig. 2 is a front view of Fig. 1 .

Fig. 3 is a cross-sectional view along line A-A in Fig. 2 .

Fig. 4 is a left side view of Fig. 2 .

Fig. 5 is a sectional view along the line B-B in Fig. 4 .

Fig. 6 is a side view of the inner tube.

Fig. 7 is a schematic cross-sectional view of a honeycomb airbag unit.

Fig. 8 is a schematic diagram of the state when the utility model is punctured by a foreign object.

Fig. 9 is a schematic diagram of adaptive filling of other honeycomb airbags after the punctured honeycomb airbag leaks air.

Fig. 10 is an axonometric view of the utility model applied to a tire with a relatively small flatness.

Fig. 11 is a front view of Fig. 10 .

Fig. 12 is a cross-sectional view along line C-C in Fig. 11 .

In the figure: 1-wheel hub; 2-outer tire; 3-inner tube; 4-honeycomb airbag; 5-main trachea; 6-bronchi; 7-one-way valve.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" " and other indications are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the application product is used, and are only for the convenience of describing the application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description, and should not be understood as indicating or implying relative importance.

In addition, terms such as "horizontal" and "vertical" in the description of the present application do not mean that the components are required to be absolutely horizontal or hang, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be explained that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed The connection can also be 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 intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Example 1:

A kind of explosion-proof tire shown in conjunction with accompanying drawing 1-Fig. 9 of specification, comprises wheel hub 1, is installed on the cover tire 2 on wheel hub 1, and inner tube 3 is installed in described cover tire 2, and described inner tube 3 is made up of a plurality of honeycomb airbags 4 , the honeycomb airbag 4 is made of elastic rubber, any honeycomb airbag 4 is connected with a bronchus 6 for inflating the honeycomb airbag 4, any bronchus 6 is communicated with the main trachea 5, and the free end of the main trachea 5 It is airtightly connected with the air nozzle installed on the hub 1; a one-way valve to prevent gas from escaping is also arranged on any bronchus 6 or in the honeycomb airbag 4.

A brief description of the working and structural principles: the wheel hub 1 and the outer tire 2 are nested with each other, and the outer tire 2 and the wheel hub 1 are squeezed and fixed together by air pressure. Sealing or non-sealing with the hub 1 is all possible. The contact seal is adopted between the tubeless tire and the wheel hub of existing cars on the market, but the high pressure tires equipped with inner tubes, such as the tires of buses and large trucks, are not sealed between the outer tire and the hub, and only play the role of anti-corrosion. The role of pressure support. In the above structure, whether the seal between the hub 1 and the tire 2 does not affect the normal use of the tire. The difference between the inner tube 3 and the existing high-pressure inner bag is that the inner tube 3 in the utility model includes a plurality of independently inflated honeycomb airbags 4, and the gas between the honeycomb airbag 4 and another honeycomb airbag 4 cannot communicate with each other. Gas can only enter any one honeycomb airbag 4 in one direction, and when the honeycomb airbag 4 is complete, the gas cannot escape from the honeycomb airbag 4 automatically. The main air pipe 5 is connected with the air nozzle installed on the hub 1. When inflation is required, the air is passed through the main air pipe 5 and the multiple bronchi 6 connected to the main air pipe 5 in turn through the air nozzle, and then the gas is passed through the one-way valve. The gas is charged into the honeycomb airbag 4, because the honeycomb airbag 4 has strong plasticity and elastic deformation ability, therefore, in the inflated state, the honeycomb airbag 4 can adaptively fill the cavity between the entire wheel hub 1 and the outer tire 2, The pressure inside the whole tire 2 is uniform, but when some individual honeycomb airbags 4 are punctured by external forces or hard objects, causing damage to the honeycomb airbags 4, the adjacent honeycomb airbags will self-adaptively expand the air leakage of the honeycomb airbags 4. The original space is occupied, so that the overall air pressure of the tire can still be maintained at a considerable level. The smaller the individual space occupied by the honeycomb airbag 4 is, the lower the air pressure of the entire tire is, and vice versa. Adopting the structure provided with the above-mentioned multi-honeycomb airbag 4 can avoid the serious consequences of tire overall loss of pressure or even tire blowout due to partial air leakage in the prior art. In addition, adopting the structure of the multi-honeycomb airbag 4 makes the sidewall of the tire 2 no different from the existing common tire, and the thickness of the sidewall of the tire will be much thinner than that of the existing run-flat tire, so that when passing through the pothole road , it is not easy to cause extrusion between the ground and the wheel hub 1, causing the wire curtain in the tire 2 to break and causing the tire 2 to be scrapped, thereby greatly reducing the tire use cost. As shown in Figure 8, when foreign matter, as nails, will puncture one or more honeycomb airbags 4 in the inner tube 3 after the cover tire 2 is punctured, after the honeycomb airbag 4 is punctured, the gas inside will leak rapidly, as Figure 9 shows. But at the same time, the surrounding unpunctured honeycomb airbags 4 will gradually expand under the effect of air pressure to fill the space of the punctured honeycomb airbags. The bigger it is, the farther away from the punctured honeycomb airbag 4 the expansion degree of other honeycomb airbags is smaller, until the pressure inside the whole tire reaches the equilibrium position. Since the length of the foreign matter is always limited and the direction of penetration is single, it is impossible to puncture all the honeycomb airbags 4. Therefore, the partial air leakage of the honeycomb airbags will not lead to the overall lack of air in the tire. Therefore, this The tire of the embodiment can effectively play the role of anti-explosion.

Example 2:

On the basis of Embodiment 1, in order to further optimize the structure, the following aspects are specifically improved: in order to further facilitate the installation of the inner tube 3, eliminate the pressure difference, and make the cavity pressure between the entire outer tire 2 and the wheel hub 1 uniform. In the embodiment, the inner tube 3 is composed of a plurality of longitudinally arranged honeycomb airbag units, and the inner tube 3 has a cuboid structure as a whole, and is wound and filled in the cavity formed by the outer tire 2 and the hub 1; any side of the inner tube 3 The main trachea 5 is connected to the wall, and the bronchus 6 is arranged between two adjacent honeycomb airbag units.

In this embodiment, in order to facilitate the manufacture and installation of the inner tube, the honeycomb airbag unit is composed of a plurality of horizontally arranged honeycomb airbags 4 on the premise of satisfying uniform inflation.

Further preferably, the one-way valve is a duckbill-type one-way valve made of silica gel or silicone rubber, and the duckbill-type one-way valve includes two pieces of silica gel that are attached to each other for one-way flow of gas. The shape of the duckbill one-way valve is wedge-shaped, and it has two upper and lower soft silica gel sheets that are attached to each other. The side walls of the two silica gel sheets are integrally connected along the length direction. , the end of the duckbill check valve close to the honeycomb airbag 4 is attached to each other in a natural state, when there is gas passing through, it will easily push away two pieces of silica gel, so that the gas enters the honeycomb airbag 4; When the pressure inside the honeycomb airbag 4 is higher than the external pressure of the honeycomb airbag 4, due to the duckbill-shaped design of the one-way valve, the two pieces of silica gel will be subjected to greater pressure, so that the two pieces of silica gel will be tightly squeezed together, and the honeycomb will The greater the pressure inside the airbag 4, the tighter the silicone sheet is squeezed, so that the sealing effect is better, and the problems of air leakage and outgassing during use are avoided.

In order to make the air pressure distribution inside the tire more uniform, the center of gravity of the tire more uniform, and reduce tire noise during driving, preferably, the inner tube 3 is composed of a first section, a middle section and a tail section, and the transverse width of the first section is smaller than that of the tail section Width, the transverse width of the tail section is less than the transverse width of the middle section, the longitudinal length of the first section accounts for 10%-13% of the total longitudinal length of the inner tube 3, and the longitudinal length of the middle section accounts for the longitudinal length of the inner tube 3 75%-80%, and the rest is the longitudinal length of the tail section. The purpose of adopting the above-mentioned structural design is to satisfy the internal structure of the existing wheel hub and tire, make it compatible with the wheel hub and tire of the existing automobile, and can be directly applied in the existing automobile tire, thereby making the utility model practical and usable The degree of promotion becomes wider and is not limited by the structure of existing automobile tires and hubs. It is worth noting that the above-mentioned structural arrangement is only an optimized design scheme, and will not cause any restriction or restriction on the reliable realization of the utility model.

The above is only a preferred embodiment of the application, and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A kind of run-flat tire, comprises wheel hub (1), is installed on the cover tire (2) on the wheel hub (1), and inner tube (3) is installed in described cover tire (2), is characterized in that: described inner tube (3) is made of multiple Each honeycomb airbag (4) is made up of elastic rubber, any honeycomb airbag (4) is connected with a bronchus (6) for inflating the honeycomb airbag (4), any bronchus ( 6) are all communicated with the main air pipe (5), and the free end of the main air pipe (5) is airtightly connected with the air nozzle installed on the hub (1); There is also a one-way valve to prevent gas from escaping.
A kind of run-flat tire according to claim 1, characterized in that: the inner tube (3) is composed of a plurality of honeycomb airbag units arranged longitudinally, the inner tube (3) has a rectangular parallelepiped structure as a whole, and is wound and filled on the outer tire (2 ) and the cavity formed by the hub (1); any side wall of the inner tube (3) is connected with the main air pipe (5), and the bronchus (6) is arranged on two adjacent honeycomb airbag units between.
A run-flat tire according to claim 2, characterized in that: the honeycomb airbag unit is composed of a plurality of honeycomb airbags (4) arranged transversely.
A kind of run-flat tire according to claim 1, characterized in that: the one-way valve is a duckbill-type one-way valve made of silica gel or silicon rubber, and the duckbill-type one-way valve consists of two pieces bonded to each other Silicone sheet for one-way flow of gas.
A kind of run-flat tire according to claim 2, characterized in that: the inner tube (3) is composed of a first section, a middle section and a tail section, the transverse width of the first section is smaller than the transverse width of the tail section, and the tail section The transverse width of the first section is less than the transverse width of the middle section, the longitudinal length of the first section accounts for 10%-13% of the total longitudinal length of the inner tube (3), and the longitudinal length of the middle section accounts for 75% of the longitudinal length of the inner tube (3). %-80%, the rest is the longitudinal length of the tail section.