Air tap with mechanical pressure gauge

Abstract

The invention provides an air tap with a mechanical pressure gauge, and relates to the technical field of tire pressure monitoring, an air tap main body is of a beautiful tap or French tap type, is made of a wear-resistant and corrosion-resistant metal material, and is internally provided with a smooth gas channel, and the mechanical pressure gauge comprises a spring tube, is of a thin-wall hollow structure, is made of a metal material, and is internally provided with a gas channel. The spring tube is fixed to the shell of the air tap body through brazing or glue, the mechanical pressure gauge is arranged, and the air tap is different from a traditional air tap only having a single inflation function, a user can know the air pressure condition in a tire in real time in the inflation process, the problem that the air pressure is too high or too low due to inflation only based on experience is solved, the tire burst risk is effectively reduced, and the service life of the tire is prolonged. Meanwhile, the phenomena of increased riding resistance and accelerated tire abrasion caused by insufficient air pressure are reduced, the service life of the tire is prolonged, and riding safety and high efficiency are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of tire pressure monitoring, and in particular to a gas nozzle with a mechanical pressure gauge. Background Art

[0002] Tire pressure, strictly speaking, refers to the pressure of the air inside the tire. Now many tires are not filled with air. For these tires, the tire pressure requirements are relatively strict. Tires filled with air are related to the change of seasons. And tire pressure is closely related to the performance of the car, such as comfort and carrying capacity, and it will also affect the life of the tire. Air pressure is the life of the tire. Too high or too low will shorten the service life of the tire. Too low air pressure will increase the deformation of the tire body, and cracks will easily appear on the sidewalls. At the same time, flexion movement will occur, resulting in excessive heat, rubber aging, cord fatigue, cord breakage, and increase the tire contact area, accelerating shoulder wear. Too high air pressure will cause excessive stretching and deformation of the tire cord, reduce the elasticity of the tire body, increase the load on the car during driving, and cause internal cracks and explosions in the event of impact. At the same time, too high air pressure will accelerate the wear of the crown and reduce the rolling resistance. In daily life, bicycles and electric vehicles are common short-distance travel tools. The precise control of their tire pressure has a key impact on riding safety, comfort and tire life.

[0003] However, there are common defects in the air nozzles on the market. On the one hand, most traditional air nozzles only have a single inflation function, and users cannot know the real-time air pressure in the tire during the inflation process. Inflation based on experience alone can easily lead to excessive or low air pressure. Excessive air pressure may cause the risk of tire blowout, while too low air pressure will increase riding resistance and accelerate tire wear. On the other hand, even if some air nozzles are equipped with pressure gauges, in complex outdoor environments, electronic pressure gauges often fail due to battery exhaustion, water ingress and short circuit, and cannot meet users' needs for accurate and convenient tire pressure monitoring.

[0004] Therefore, we propose a gas nozzle with a mechanical pressure gauge. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art. On the one hand, most traditional air nozzles only have a single inflation function, and users cannot know the air pressure in the tire in real time during the inflation process. Inflation based on experience alone can easily lead to excessive or low air pressure. Excessive air pressure may cause the risk of tire blowout, while too low air pressure will increase riding resistance and accelerate tire wear. On the other hand, even if some air nozzles are equipped with pressure gauges, in complex outdoor environments, electronic pressure gauges often fail due to battery exhaustion, water ingress short circuit and other faults, and cannot meet the user's demand for accurate and convenient tire pressure monitoring.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A gas nozzle with a mechanical pressure gauge, comprising:

[0008] The gas nozzle body, which is a Schrader or Ferrari type, is made of a wear-resistant and corrosion-resistant metal material and has a smooth gas passage inside;

[0009] Mechanical pressure gauge, comprising:

[0010] The spring tube is a thin-walled hollow structure made of metal material, and the spring tube is fixed to the outer shell of the air nozzle body by brazing or gluing;

[0011] A pointer and a dial, wherein the free end of the spring tube is connected to the pointer through a mechanical transmission mechanism, and the dial is located outside the air nozzle body and has a scale accurately calibrated according to the deformation of the spring tube, and is used to indicate the air pressure value;

[0012] A transparent cover, made of a high-strength, high-transparency material, is provided above the dial to protect the dial and the hands;

[0013] The case is made of a strong and lightweight material for accommodating the spring tube, the pointer and the dial. The case is connected to the valve body by a threaded fixing, and the threaded fixing can form a seal when connected to prevent gas leakage.

[0014] As a preferred solution of the present invention, when the spring tube is inflated, the internal pressure causes its thin wall to expand outward, and the resulting stretch deformation is proportional to the gas pressure entering the air nozzle. The pointer is driven by a mechanical transmission mechanism to indicate the corresponding air pressure value on the dial.

[0015] As a preferred solution of the present invention, the metal material of the air nozzle body is stainless steel or aluminum alloy.

[0016] As a preferred solution of the present invention, the material of the watch case is engineering plastic, and the material of the transparent cover is high-strength plastic or glass.

[0017] As a preferred solution of the present invention, the threaded fixing part is made of metal, and its thread design can ensure the tight connection and sealing between the watch case and the air nozzle body.

[0018] As a preferred solution of the present invention, the mechanical transmission mechanism is a high-precision connecting rod or gear mechanism, which can accurately transmit the deformation of the spring tube to the pointer.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is equipped with a mechanical pressure gauge, which is different from the traditional air nozzle which only has a single inflation function. The user can know the air pressure in the tire in real time during the inflation process, avoiding the problem of too high or too low air pressure caused by inflation based on experience alone, effectively reducing the risk of tire blowout, and at the same time reducing the increase in riding resistance and accelerated tire wear caused by insufficient air pressure, thereby extending the service life of the tire and ensuring riding safety and efficiency.

[0021] The main body of the gas nozzle is made of wear-resistant and corrosion-resistant stainless steel or aluminum alloy metal materials, and the internal gas channel is smooth to ensure smooth gas flow and durability; the case of the mechanical pressure gauge is made of strong and lightweight engineering plastics, and the transparent cover is made of high-strength plastic or glass, which can withstand the impact of complex outdoor environments and protect internal components; the threaded fasteners are made of metal, and the threaded design ensures that the case and the gas nozzle body are tightly connected and sealed to prevent gas leakage. The overall structure is stable and can adapt to a variety of usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the main structure of a gas nozzle with a mechanical pressure gauge provided by the present invention;

[0023] Figure 2 A schematic diagram of the unfolding of a transparent cover of a gas nozzle with a mechanical pressure gauge provided by the present invention;

[0024] Figure 3 A schematic diagram of the main explosion structure of a gas nozzle with a mechanical pressure gauge provided by the present invention;

[0025] Figure 4 A schematic cross-sectional view of a gas nozzle body of a gas nozzle with a mechanical pressure gauge provided by the present invention;

[0026] Figure 5 The gas nozzle body of the gas nozzle with a mechanical pressure gauge provided by the present invention is a schematic diagram of the appearance of a beautiful nozzle.

[0027] Legend: 1. Valve body; 2. Spring tube; 3. Pointer; 4. Dial; 5. Transparent cover; 6. Case; 7. Threaded fixings. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to related references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] Example

[0033] like Figure 1-5 As shown, the present invention provides a technical solution: the air nozzle body 1 is made of stainless steel or aluminum alloy as raw material, and the shape of the air nozzle body 1 is created through precise mechanical processing technology to ensure that it meets the standard specifications of the American or French nozzles.

[0034] During the processing, high-precision drilling and grinding technology is used to make the internal gas channel smooth and burr-free, ensuring that the gas can pass smoothly, while enhancing the wear and corrosion resistance of the gas nozzle body 1 to adapt to various harsh use environments.

[0035] Mechanical pressure gauge components: Spring tube 2, select suitable metal materials, such as phosphor bronze and other metals with good elasticity and fatigue resistance, and make a thin-walled hollow structure through precise stamping and winding processes.

[0036] When fixing the spring tube 2 to the outer shell of the air nozzle body 1, select brazing or gluing fixing method according to actual needs. If brazing is used, the welding temperature and time must be accurately controlled to ensure that the welding is firm and does not affect the elastic properties of the spring tube 2; if glue is used, high-strength, aging-resistant glue must be selected, and the glue instructions must be strictly followed to ensure that the spring tube 2 is stably connected to the outer shell of the air nozzle body 1.

[0037] Pointer 3 and dial 4: Dial 4, according to the deformation characteristics of spring tube 2, uses professional calibration equipment to accurately calibrate the scale of dial 4 so that it can accurately reflect the air pressure value. Pointer 3 is made of light and rigid materials to ensure that it can rotate flexibly and indicate accurately under the drive of the mechanical transmission mechanism. Pointer 3 is connected to the free end of spring tube 2 through a high-precision connecting rod or gear mechanism (mechanical transmission mechanism). The mechanical transmission mechanism needs to be finely assembled and debugged to ensure that the deformation of spring tube 2 can be accurately transmitted to pointer 3.

[0038] Transparent cover 5: High-strength plastic (such as polycarbonate) or glass is selected as the raw material, and is made into a shape that fits the dial 4 and the pointer 3 through injection molding (for plastic) or cutting and grinding (for glass). The transparent cover 5 should have high transparency so that the user can clearly read the air pressure value on the dial 4, and at the same time, it should have sufficient strength to withstand external impacts such as collisions and scratches in daily use, and protect the dial 4 and the pointer 3 from damage.

[0039] Case 6: The case 6 is made of engineering plastic as raw material and has a certain structural strength through injection molding process, and is used to accommodate the spring tube 2, the pointer 3 and the dial 4. The case 6 is designed with a connection structure that matches the threaded fixing 7 to ensure a tight fit when connected to the gas nozzle body 1, and a sealing groove or sealing gasket is provided at the connection part to cooperate with the threaded fixing 7 to prevent gas leakage.

[0040] Assembly process: First, accurately fix the prepared spring tube 2 on the specified position of the outer shell of the air nozzle body 1, check the firmness of the fixation, and ensure that the spring tube 2 will not loosen or move.

[0041] Next, one end of the mechanical transmission mechanism is precisely connected to the free end of the spring tube 2, and the transmission mechanism is debugged so that the pointer 3 can accurately point to the zero scale position of the dial 4 in its initial state. Then, the pointer 3 and the dial 4 are installed into the case 6 in sequence, ensuring that all components are installed in place, the pointer 3 rotates smoothly, and the scale of the dial 4 is clearly visible.

[0042] After that, the case 6 with the internal components is connected to the gas nozzle body 1 through the threaded fixings 7. During the connection process, use a suitable tool to tighten the threaded fixings 7 according to the specified torque so that the case 6 and the gas nozzle body 1 fit tightly together to form a reliable seal to prevent gas leakage from the connection. At the same time, check the connection of each component again to ensure that the entire device structure is stable.

[0043] Finally, the transparent cover 5 is installed on the watch case 6, and the transparent cover 5 is firmly fixed by means of snaps, glue or other fixing methods, thereby completing the assembly of the air nozzle with the mechanical pressure gauge.

[0044] Test verification: After assembly, perform an appearance inspection on the valve to ensure that there are no obvious defects on the components, that the transparent cover 5 has no scratches or bubbles, that the scale on the dial 4 is clear and complete, and that the pointer 3 rotates flexibly.

[0045] Conduct a pressure tightness test, connect the air nozzle to a professional pressure test device, fill the air nozzle with a certain pressure of gas, and observe whether there is gas leakage at each connection part of the air nozzle. If leakage is found, promptly check whether it is a sealing problem of the threaded fixing 7 or a poor sealing of other parts, and make corresponding repairs and adjustments.

[0046] Test the accuracy of the mechanical pressure gauge. Use a standard air pressure source to gradually inflate the air nozzle at different air pressure values, and compare the error between the indicated value of the mechanical pressure gauge and the standard air pressure value. It is required that within the normal use air pressure range, the error be controlled within the allowable accuracy range, such as ±0.05MPa. If the error exceeds the range, calibrate by adjusting the mechanical transmission mechanism, calibrating the dial 4 scales, etc. until the mechanical pressure gauge can accurately indicate the air pressure value.

[0047] Usage process: In the preparation stage, confirm the type of vehicle air nozzle. The air nozzle of the present invention is suitable for common bicycle and electric vehicle air nozzles, which are divided into two types: American nozzle and French nozzle. Prepare the air nozzle with the corresponding interface according to the actual situation of the vehicle.

[0048] Check the appearance of the air nozzle to ensure that the transparent cover 5 is not damaged, the case 6 and the air nozzle body 1 are not obviously deformed or damaged, and all parts are tightly connected. If any problems are found, they should be replaced or repaired in time to avoid affecting the use effect.

[0049] Connect the valve, align the valve body 1 with the valve seat of the vehicle, and insert it smoothly according to the normal inflation operation method, ensuring that the valve and the valve seat fit tightly to avoid leakage. For the Schneider valve, pay attention to the tightening degree of the nut; for the Ferrari valve, ensure that the valve core is in a suitable open state to ensure smooth subsequent inflation.

[0050] Inflation and monitoring: Connect a suitable inflation device (such as an air pump, etc.) and start inflation. During the inflation process, the user does not need to perform any additional operations, but only needs to look at the dial 4 on the outside of the air nozzle body 1.

[0051] As the gas is continuously filled into the tire, the air pressure in the tire enters the spring tube 2 through the smooth air passage inside the air nozzle body 1. As a sensitive pressure sensing component, the spring tube 2 has a thin-walled hollow structure that rapidly expands outward due to the increase in internal air pressure.

[0052] The deformation of the spring tube 2 will drive the pointer 3 to rotate.

[0053] It should be noted that the principle for rotating the pointer 3 in the present invention can refer to the rotation principle of the pointer 3 in the pressure indicator such as a fire extinguisher, which is a mature solution in air pressure detection. When used in this field, it has the advantage of being able to operate in complex outdoor environments, avoiding the failure of electronic pressure gauges due to battery exhaustion, water short circuit and other faults, and being unable to meet the user's needs for accurate and convenient tire pressure monitoring.

[0054] The user can read the air pressure value indicated by the pointer 3 in real time through the clear scale on the dial 4, so as to accurately grasp the air pressure in the tire. The scale is strictly calibrated and corresponds to the actual air pressure to ensure accurate and reliable readings.

[0055] Complete inflation:

[0056] When pointer 3 indicates that the standard air pressure required by the vehicle has been reached (the standard tire pressure of different vehicles can be referred to the vehicle manual or tire mark), stop inflating.

[0057] Carefully pull the air nozzle out of the vehicle's air nozzle holder and put it back in place for safekeeping for next use.

[0058] The following is a detailed description of the rotation principle of the pointer 3:

[0059] When the tire begins to be inflated, the gas flows into the spring tube 2 through the valve body 1, starting a series of chain reactions in which the pointer 3 rotates.

[0060] First, as a pressure-sensitive element, the thin-walled hollow structure of the spring tube 2 deforms under the action of air pressure in accordance with the principle of elastic mechanics. Due to the use of special metal materials with good elastic modulus, when the air pressure in the tube increases, the thin-walled part of the spring tube 2 expands outward evenly. This expansion is based on the force between the molecules of the material being overcome by the air pressure, thereby stretching the distance between the molecules. Assuming that the spring tube 2 is initially arc-shaped, its curvature will gradually decrease after inflation, and develop a trend towards straightening, resulting in a measurable linear displacement change.

[0061] Next, the free end of the spring tube 2 is closely connected to the mechanical transmission mechanism. If a connecting rod assembly is used, the connecting rod is usually made of a high-strength, low-expansion coefficient metal, such as an aluminum alloy, and one end is fixed to the free end of the spring tube 2 by a high-precision ball hinge connection. This connection allows the spring tube 2 to deform freely within a certain range while ensuring effective force transmission. When the spring tube 2 deforms and displaces, the connecting rod accurately follows the expansion and contraction of the spring tube 2 based on its own strictly controlled length tolerance (for example, controlled within the range of ±0.05mm), converting the linear displacement into a subtle change in its own angle.

[0062] The other end of the connecting rod is also connected to the axis of pointer 3 in a precise manner. By designing a clever connecting rod layout, the change in the connecting rod angle is converted into the circular motion of pointer 3 around the central axis according to the mechanical kinematics law. For example, in a simple double-connecting rod structure, the first connecting rod transmits the displacement of spring tube 2 to the second connecting rod. The second connecting rod makes pointer 3 start to rotate clockwise or counterclockwise on dial 4 according to the geometric relationship. During the rotation process, due to the high-precision processing and low-friction characteristics of the connecting rod, pointer 3 rotates smoothly and smoothly without jamming or jumping.

[0063] If a gear assembly is used, the free end of the spring tube 2 is directly or indirectly connected to a small gear. The small gear is usually made of high-quality alloy steel through precision gear grinding, and the tooth profile accuracy reaches DIN level 5 and above. When the spring tube 2 is displaced, it drives the small gear to rotate, and the small gear meshes with one or more large gears. The meshing clearance between the gears is precisely controlled within the range of ±0.02mm. According to the gear transmission ratio, the small rotation of the small gear is amplified step by step, and finally drives the pointer 3 to rotate efficiently. For example, the small gear has 10 teeth and meshes with a large gear with 50 teeth. The transmission ratio is 5:1. The small gear rotates 1 circle and the large gear rotates 1 / 5 circle. The pointer 3 is installed on the central axis of the large gear, and it rotates smoothly with the large gear, accurately indicating the change in air pressure.

[0064] Throughout the entire process, the scale of the dial 4 is calibrated based on the precise correspondence between the deformation of the spring tube 2 and the rotation of the pointer 3. During the research and development phase, a high-precision pressure standard source (such as a piston pressure gauge with an accuracy of ±0.01kPa) is used. Starting from the lowest measured pressure (such as 0.5kPa), the pressure is gradually increased in very small pressure steps (such as 0.1kPa). With each additional step, the deformation of the spring tube 2 is measured in real time using a laser displacement sensor, and the rotation angle of the pointer 3 is accurately recorded using a high-precision angle encoder. After a large amount of measured data is collected, the scale is drawn using a professional least squares fitting algorithm to ensure that the scale corresponds accurately to the actual air pressure. The user can intuitively read the accurate air pressure value through the dial 4.

[0065] In summary, both the connecting rod assembly and the gear assembly use sophisticated mechanical design and high-precision manufacturing technology to accurately convert the deformation of the spring tube 2 into the rotation of the pointer 3, thereby achieving an accurate air pressure indication function.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas nozzle with a mechanical pressure gauge, characterized in that: include: The gas nozzle body (1) is of the Schrader or Ferrari type, made of a wear-resistant and corrosion-resistant metal material, and has a smooth gas passage inside; Mechanical pressure gauge, comprising: The spring tube (2) is a thin-walled hollow structure made of metal material, and the spring tube (2) is fixed to the outer shell of the air nozzle body (1) by brazing or gluing; A pointer (3) and a dial (4), wherein the free end of the spring tube (2) is connected to the pointer (3) via a mechanical transmission mechanism, and the dial (4) is located outside the air nozzle body (1) and has a scale accurately calibrated according to the deformation of the spring tube (2) and is used to indicate the air pressure value; A transparent cover (5), made of a high-strength, high-transparency material, is disposed above the dial (4) to protect the dial (4) and the pointer (3); A case (6) is made of a strong and lightweight material and is used to accommodate the spring tube (2), the pointer (3) and the dial (4). The case (6) is connected to the gas nozzle body (1) through a threaded fixing (7). The threaded fixing (7) can form a seal when connected to prevent gas leakage.

2. A gas nozzle with a mechanical pressure gauge according to claim 1, characterized in that: When the spring tube (2) is inflated, the internal pressure causes its thin wall to expand outwards, and the resulting stretch deformation is proportional to the pressure of the gas entering the air nozzle. The mechanical transmission mechanism drives the pointer (3) to indicate the corresponding air pressure value on the dial (4).

3. A gas nozzle with a mechanical pressure gauge according to claim 2, characterized in that: The metal material of the air nozzle body (1) is stainless steel or aluminum alloy.

4. A gas nozzle with a mechanical pressure gauge according to claim 3, characterized in that: The material of the watch case (6) is engineering plastic, and the material of the transparent cover (5) is high-strength plastic or glass.

5. A gas nozzle with a mechanical pressure gauge according to claim 4, characterized in that: The threaded fixing member (7) is made of metal, and its threaded design can ensure a tight connection and sealing between the watch case (6) and the air nozzle body (1).

6. A gas nozzle with a mechanical pressure gauge according to claim 5, characterized in that: The mechanical transmission mechanism is a high-precision connecting rod or gear mechanism, which can accurately transmit the deformation of the spring tube (2) to the pointer (3).

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