Inflation pump

Abstract

The utility model provides an inflating pump, which adopts layered nested air taps, and can adapt to various air taps with different diameter ranges and different lengths through layered nested design of an inner pipe, a middle pipe and an outer pipe and optimization of elastic materials of the middle pipe and a self-adaptive sealing mechanism, so that tight connection and effective sealing are realized; a large number of conversion connectors do not need to be additionally arranged, the universality of the inflation pump is greatly improved, the sealing cement gum is filled between the middle pipe and the inner pipe, the aramid fiber filaments are added in the middle pipe structure, the sealing performance and the deformation resistance of the air tap are effectively improved, and in the long-term use process, the air tap is not prone to deformation. Even if the sealing surface is damaged to a certain degree or the sealing performance is reduced due to repeated insertion and extraction of the air tap, the self-repairing function of the sealing cement gum can also recover the sealing effect in time, so that the possibility of gas leakage is reduced, and the accuracy and the stability of inflation pressure are ensured.

Description

Technical Field

[0001] This utility model relates to the field of air pump technology, and in particular to an air pump. Background Technology

[0002] With the development of modern society, the variety of inflatable products has become increasingly diverse, including tires for various vehicles (such as bicycles, motorcycles, and cars), sporting goods (such as basketballs, footballs, and volleyballs), outdoor leisure equipment (such as inflatable tents and inflatable mattresses), and some inflatable devices in the industrial field. Different types of inflatable products vary significantly in the diameter, length, and structural design of their nozzles.

[0003] Traditional air pump valves are often designed for only a few common valve sizes. For example, American and French valves are commonly used for bicycle tires, while ball valves have their own unique structure. When faced with special sizes or newer models of inflatable products, this single-size valve becomes inadequate, forcing users to purchase various adapters or even preventing inflation altogether due to the lack of suitable compatibility. Furthermore, the stability of the valve in place on the inflated object (especially tires) is a significant issue during inflation. Traditional valves mostly rely on simple plugging and unplugging friction or simple clips for fixation. At higher inflation pressures or on uneven surfaces, the valve can easily loosen or detach, affecting inflation efficiency and potentially leading to underinflation or even safety hazards due to gas leakage.

[0004] Meanwhile, in order to improve the overall performance of the air pump, higher requirements are also put forward for the gas transmission efficiency, sealing performance and durability of the air nozzle. Traditional air nozzles are relatively simple in these aspects and cannot meet the growing user needs and complex usage environments. To comprehensively address the different diameters and lengths of air nozzles for different types of inflatable products, and considering the durability of the air pump nozzle, an air pump is proposed that solves the above problems by designing a layered nested air nozzle. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes an air pump that more precisely solves the issues of varying nozzle diameters and lengths for different types of inflatable products, as well as considering the durability of the air pump nozzle.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes an air pump, including a pump body and an air pump nozzle. One end of the pump body is provided with a filter screen, and the other end of the pump body is fixedly connected to a connecting pipe. The connecting pipe is fixedly connected to a retainer, and the air pump nozzle is fixedly installed in the retainer. The air pump nozzle includes an outer tube, a middle tube, and an inner tube. The front end of the inner tube is conical and has an air pump hole. The connecting pipe is connected to the inner tube. The annular space between the inner tube and the middle tube is filled with deformable sealing putty.

[0008] Furthermore, the air inlets are centrally symmetrically distributed, with the diameter of the air inlets located at the front end of the inner tube increasing sequentially from the outside to the inside.

[0009] Furthermore, the inner tube is made of high-strength, wear-resistant, and flexible titanium alloy.

[0010] Furthermore, the inner wall of the inner tube is coated with a layer of Teflon coating.

[0011] Furthermore, the inner side of the outer end of the tube is designed with a lip that protrudes outward.

[0012] Furthermore, the central tube is made of a new type of high-performance elastic rubber material.

[0013] Furthermore, multiple high-strength aramid fibers are evenly distributed along the axial direction inside the central tube and are tightly bonded to the rubber material to form a composite structure.

[0014] Furthermore, the outer tube is made of thermoplastic polyurethane elastomer rubber, and 10% to 20% of short-cut aramid fibers are added to the thermoplastic polyurethane elastomer rubber matrix of the outer tube to form a composite material structure.

[0015] Furthermore, the outer surface of the outer tube is coated with a layer of polytetrafluoroethylene.

[0016] Furthermore, a display window is fixedly installed on the pump body, and a small pressure indicator is installed inside the display window. This device is connected to the air filling channel of the inner tube through a thin tube.

[0017] The beneficial effects of this utility model are:

[0018] 1. The layered nested air valve proposed in this utility model, through the layered nested design of the inner tube, middle tube, and outer tube, and the optimization of the elastic material of the middle tube and the adaptive sealing mechanism, can adapt to various air valves with different diameter ranges and lengths. Whether it is a common bicycle or car tire valve, or a special valve for balls, inflatable toys, etc., a tight connection and effective seal can be achieved, eliminating the need for a large number of additional adapters, greatly improving the versatility of the air pump, and making it convenient for users to use the same air pump in different inflation scenarios.

[0019] 2. The sealing putty filling between the middle tube and the inner tube, as well as the addition of aramid fiber filaments to the middle tube structure, effectively improves the sealing performance and deformation resistance of the nozzle. During long-term use, even if the sealing surface is damaged to a certain extent or the sealing performance decreases due to repeated insertion and removal of the nozzle, the self-repairing function of the sealing putty can restore the sealing effect in time, reducing the possibility of gas leakage and ensuring the accuracy and stability of the inflation pressure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main body of the air pump of this utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the air nozzle of the air pump of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the air pump nozzle of this utility model.

[0023] Figure 4 This is a schematic diagram of the outer tube, middle tube, and inner tube structure of the air pump of this utility model.

[0024] The attached figures are labeled as follows:

[0025] 10. Pump body; 11. Filter screen; 12. Display window; 13. Connecting pipe; 14. Fixing device; 20. Outer pipe; 21. Middle pipe; 22. Inner pipe; 23. Sealing putty; 24. Lip; 25. Air inlet. Detailed Implementation

[0026] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will further explain this utility model.

[0027] Please refer to Figure 1 - Figure 4 This utility model proposes an air pump. In use, first hold the retainer 14, insert the inner tube 22 at the front end of the retainer 14 into the air nozzle, and let the outer tube 20 and middle tube 21 on the outside of the inner tube 22 cover the outer diameter of the air nozzle. Then, clamp and fix the outer tube 20 and middle tube 21 to the air nozzle through the retainer 14. Start the pump body 10. The pump body 10 filters the air through the filter screen 11 at one end of the pump body 10 and then passes it through the connecting pipe 13 fixedly connected to the other end of the pump body 10. The connecting pipe 13 is fixedly connected to and communicates with the inner tube 22 in the retainer 14. The gas will enter the tire body through the air inlet 25 opened on the inner tube 22 to realize inflation. After inflation is completed, unlock the retainer 14 and separate the outer tube 20 and middle tube 21 from the air nozzle and remove them.

[0028] Since the front end of the inner tube 22 is tapered and has an air inlet 25, the air inlet 25 is centrally symmetrically distributed. The diameter of the air inlet 25 at the front end increases from the outside to the inside, which is beneficial for the inner tube 22 to inflate according to the diameter and depth of different air nozzles, while preventing impurities from entering the inner tube 22.

[0029] The inner tube 22 is made of high-strength, wear-resistant, and flexible titanium alloy, which allows it to withstand high air pressure without deformation and to accommodate minor deviations when the air pump nozzle is inserted, reducing the risk of damage caused by collisions and greatly extending the service life of the inner tube 22. The inner wall of the inner tube 22 is coated with a Teflon coating, which has an extremely low coefficient of friction, allowing the gas to flow more smoothly inside the tube, reducing pressure loss, and increasing inflation speed. In addition, the Teflon coating has good chemical stability and corrosion resistance, effectively preventing corrosion and damage to the inner wall caused by long-term contact with humid air or other chemicals.

[0030] The annular space between the inner tube 22 and the middle tube 21 is filled with deformable sealing putty 23. When the air nozzle is inserted, the middle tube 21 will automatically adjust the degree of expansion and contraction according to the diameter of the air nozzle, squeezing the sealing putty 23 so that it fits tightly against the outer wall of the air nozzle to achieve a seal. This allows it to adapt to air nozzles of different diameters within a certain range and effectively prevent gas leakage.

[0031] A raised lip 24 is designed at the outer end of the tube 21. When the air nozzle is inserted, the lip 24 can fit against the entrance of the air nozzle to further enhance the sealing effect. At the same time, it can also play a certain role in fixing and preventing the air pump nozzle from accidentally coming out during the inflation process.

[0032] The middle tube 21 is made of a new type of high-performance elastic rubber material, which gives it excellent elasticity and flexibility, as well as good aging resistance and fatigue resistance. It can maintain stable physical properties during long-term and repeated expansion and contraction deformation, and is not prone to problems such as elastic decay, hardening or cracking. This ensures that the middle tube 21 can always effectively adapt to the diameter of the inflation nozzle and maintain good sealing performance.

[0033] Multiple high-strength aramid fiber filaments are evenly distributed along the axial direction inside the middle tube 21. These fiber filaments are tightly bonded with the rubber material to form a composite structure, which greatly enhances the tensile and tear resistance of the middle tube 21. When a large-diameter air nozzle is inserted or when a large external force is generated due to air pressure fluctuations during inflation, the aramid fiber filaments can effectively share the stress, prevent the middle tube 21 from being excessively deformed or damaged, and ensure the stability and reliability of the overall structure of the air pump nozzle.

[0034] The outer tube 20 is made of thermoplastic polyurethane elastomer rubber (TPU). TPU has excellent elasticity and a wide range of elastic moduli, which can adapt to the deformation caused by the insertion of air nozzles of different diameters and lengths to a large extent. After deformation, it can quickly return to its original shape, ensuring the tightness and stability of the air pump nozzle connection. At the same time, TPU has excellent wear resistance, which is several times that of ordinary rubber. It can effectively resist the damage caused by friction with air, the ground and other external objects during use, greatly extending the service life of the outer tube 20.

[0035] The outer tube 20 contains 10% to 20% short-cut aramid fibers in its TPU matrix, forming a composite material structure. When the outer tube 20 is subjected to external friction or stretching, the aramid fibers can bear most of the stress, further improving the wear resistance and tear resistance of the outer tube 20, preventing the TPU material from breaking or tearing, thereby improving the overall durability of the outer tube 20.

[0036] The outer surface of the outer tube 20 is coated with a layer of polytetrafluoroethylene coating, which further reduces the friction between the outer tube 20 and external objects, reduces wear, and at the same time gives the surface of the outer tube 20 good chemical stability and corrosion resistance. It can effectively resist the erosion of the outer tube 20 by various chemicals, oil stains and ultraviolet rays and other environmental factors, and maintain the long-term stability of the appearance and performance of the outer tube 20.

[0037] A small pressure indicator is installed inside the display window 12. This device is connected to the inflation channel of the inner tube 22 through a thin tube and can display the air pressure value in real time during the inflation process. The pressure indicator adopts a mechanical structure with a spring and a pointer inside. As the air pressure increases, the spring is compressed and the pointer moves accordingly on the dial. The dial is marked with commonly used air pressure units and numerical ranges, which makes it convenient for users to intuitively understand the inflation pressure and avoid over-inflation or under-inflation.

[0038] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. An air pump, comprising a pump body and an air pump nozzle, characterized in that, The pump body is equipped with a filter screen at one end and a connecting pipe is fixedly connected to the other end of the pump body. The connecting pipe is fixedly connected to a retainer. The air pump nozzle is fixedly installed in the retainer. The air pump nozzle includes an outer tube, a middle tube and an inner tube. The front end of the inner tube is conical and has an air injection hole. The inner tube is connected to the connecting pipe. The annular space between the inner tube and the middle tube is filled with deformable sealing putty.

2. The air pump according to claim 1, characterized in that, The air inlet holes are centrally symmetrically distributed, with the diameter of the air inlet holes at the front end of the inner tube increasing sequentially from the outside to the inside.

3. The air pump according to claim 1, characterized in that, The inner tube is made of high-strength, wear-resistant, and flexible titanium alloy.

4. The air pump according to claim 3, characterized in that, The inner wall of the inner tube is coated with a layer of Teflon coating.

5. The air pump according to claim 1, characterized in that, The inner side of the outer end of the tube is designed with a lip that protrudes outward.

6. The air pump according to claim 1, characterized in that, The central tube is made of a new type of high-performance elastic rubber material.

7. The air pump according to claim 6, characterized in that, The interior of the central tube contains multiple high-strength aramid fibers that are uniformly distributed along the axial direction and tightly bonded to rubber material to form a composite structure.

8. The air pump according to claim 1, characterized in that, The outer tube is made of thermoplastic polyurethane elastomer rubber, and 10% to 20% of short-cut aramid fibers are added to the thermoplastic polyurethane elastomer rubber matrix of the outer tube to form a composite material structure.

9. The air pump according to claim 8, characterized in that, The outer surface of the outer tube is coated with a layer of polytetrafluoroethylene.

10. The air pump according to claim 1, characterized in that, A display window is fixedly installed on the pump body, and a small pressure indicator is installed inside the display window. This device is connected to the air filling channel of the inner tube through a thin tube.

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