Pressure maintaining device and pressure maintaining structure

Abstract

The embodiment of the utility model provides a pressure maintaining device and a pressure maintaining structure and relates to the technical field of tire inflation and deflation, the pressure maintaining device comprises a guide sealing ring and a throttling element, the guide sealing ring is arranged between an air port of a tire valve and an air port of a valve core, a containing cavity is formed in the guide sealing ring, and the throttling element is arranged in the containing cavity in a sliding mode in the axial direction. When inflation is switched to pressure maintaining, the throttling element slides from the first position to the second position, the throttling element is attached to the air port of the tire valve, and the air output of the air port of the tire valve is reduced. Due to the fact that the throttling piece is attached to the air opening of the tire valve, the air outlet amount of the air opening of the tire valve is reduced, the tire valve is closed after air in the air pipe is rapidly emptied, the pressure maintaining capacity is improved, meanwhile, the influence of reducing the air pipe aperture on the inflation efficiency is avoided, and the inflation efficiency is ensured.

Description

Technical Field

[0001] This utility model relates to the field of tire inflation and deflation technology, and in particular to a pressure-holding device and pressure-holding structure. Background Technology

[0002] A tire inflation / deflation system is an intelligent device that dynamically adjusts the internal tire pressure. Its core function is to monitor tire pressure in real time through sensors and use an air pump, control valve, and piping network to automatically or manually adjust tire pressure during driving to adapt to different road conditions. The ability to maintain tire pressure plays a crucial role in maintaining vehicle handling stability, reducing rolling resistance, and extending tire life.

[0003] In existing technologies, pressure holding capacity is usually improved by reducing the tracheal orifice diameter. However, reducing the tracheal orifice diameter reduces the inflation and deflation efficiency, making it difficult to balance inflation and deflation efficiency with pressure holding capacity. Utility Model Content

[0004] This utility model provides a pressure-holding device and pressure-holding structure to solve the technical problem that existing technologies in related fields cannot simultaneously achieve both inflation / deflation efficiency and pressure-holding capacity.

[0005] In a first aspect, embodiments of the present invention provide a pressure-holding device, comprising:

[0006] A guide sealing ring is provided between the air port of the tire valve and the air port of the valve core, and the guide sealing ring has a receiving cavity inside;

[0007] A throttling element, which is slidably disposed within the receiving cavity along the axial direction;

[0008] When switching from inflation to pressure holding, the throttling element slides from the first position to the second position, and the throttling element is in contact with the air port of the tire valve, reducing the air output of the tire valve.

[0009] In some embodiments, the throttling element includes:

[0010] The body has a fitting structure at the first end near the tire valve, and the first end of the body has a connecting hole that connects the air port of the tire valve and the receiving cavity.

[0011] A step is provided on the body at the second end away from the tire valve, and the step is provided with at least one vent groove, which connects the air port of the valve core and the receiving cavity;

[0012] When the throttle member is in the first position, the fitting structure is disengaged from the air port of the tire valve, and the air port of the tire valve is communicated with the air port of the valve core through the ventilation groove; when in the second position, the fitting structure is fitted with the air port of the tire valve, and the air port of the tire valve is communicated with the air port of the valve core through the communication hole.

[0013] In some embodiments, the communication hole includes:

[0014] An axial through hole provided at the first end of the body, and the aperture of the axial through hole is smaller than the aperture of the air port of the tire valve;

[0015] A radial through hole provided in the middle of the body, and the radial through hole is communicated with the axial through hole and the accommodating cavity.

[0016] In some embodiments, the fitting structure includes:

[0017] A conical sealing surface adapted to the edge of the air port of the tire valve.

[0018] In some embodiments, a chamfer is provided on the outer periphery of one end of the fitting structure close to the tire valve.

[0019] In some embodiments, it further includes:

[0020] A spring sleeved on the outer periphery of the body, with one end of the spring abutted against the edge of the air port of the tire valve and the other end abutted against the step.

[0021] In some embodiments, an annular mounting groove is provided on the outer periphery of one end of the guiding sealing ring close to the tire valve, and the annular mounting groove is spaced from the end face of the guiding sealing ring.

[0022] In some embodiments, the throttle member is an integrally formed structure.

[0023] In some embodiments, the throttle member is made of plastic material.

[0024] In a second aspect, an embodiment of the present invention further provides a pressure maintaining structure, and the pressure maintaining structure includes the aforementioned pressure maintaining device.

[0025] The beneficial effects brought by the technical solution provided by the present invention include:

[0026] This utility model provides a pressure holding device and a pressure holding structure. The pressure holding device includes a guide sealing ring and a throttling element. The guide sealing ring is disposed between the air port of the tire valve and the air port of the valve core. The guide sealing ring has a receiving cavity. The throttling element is slidably disposed in the receiving cavity along the axial direction. When switching from inflation to pressure holding, the throttling element slides from a first position to a second position. The throttling element is in contact with the air port of the tire valve, reducing the air output of the tire valve. In this invention, during inflation, the throttling element is in the first position, not in contact with the air port of the tire valve. Gas enters the tire through the air port of the tire valve, the receiving cavity, and the air port of the valve core. During pressure holding, the throttling element is in the second position, in contact with the air port of the tire valve. Gas must pass through the valve core, the receiving cavity, and the throttling element to enter the air pipe of the tire valve. After the gas in the air pipe is emptied, the diaphragm of the tire valve closes, completing the pressure holding process. Because the throttling element is in contact with the air port of the tire valve, the air output from the tire valve is reduced. After the gas in the air pipe is quickly emptied, the tire valve closes, improving the pressure holding capacity. At the same time, it avoids the impact of reducing the air pipe orifice diameter on inflation efficiency, ensuring inflation efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 An assembly diagram of a pressure-holding device provided for an embodiment of this utility model;

[0029] Figure 2 Another assembly diagram of a pressure-holding device provided for an embodiment of this utility model;

[0030] Figure 3 A schematic diagram of a throttling device provided in an embodiment of this utility model;

[0031] Figure 4 A CC cross-sectional view of a throttling device provided for an embodiment of this utility model;

[0032] Figure 5 A DD cross-sectional view of a throttling device provided for an embodiment of this utility model;

[0033] Figure label:

[0034] 1. Guide sealing ring; 11. Receiving cavity; 12. Annular mounting groove;

[0035] 2. Throttling element; 21. Body; 211. Fitting structure; 2111. Conical sealing surface; 2112. Chamfer; 212. Connecting hole; 2121. Axial through hole; 2122. Radial through hole; 22. Step; 221. Vent groove; 222. Vent tooth;

[0036] 3. Tire valve; 31. Diaphragm;

[0037] 4. Valve core;

[0038] 5. Spring. Detailed Implementation

[0039] 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] This utility model provides a pressure holding device and pressure holding structure, which can solve the technical problem that the existing technology in related fields is difficult to balance the gas filling and releasing efficiency and the pressure holding capacity.

[0041] See Figure 1 and Figure 2 As shown in the figure, an embodiment of the present invention provides a pressure-holding device, which includes a guide sealing ring 1 and a throttling element 2. The guide sealing ring 1 is disposed between the air port of the tire valve 3 and the air port of the valve core 4. The guide sealing ring 1 has a receiving cavity 11. The throttling element 2 is slidably disposed in the receiving cavity 11 along the axial direction. When switching from inflation to pressure holding, the throttling element 2 slides from a first position to a second position. The throttling element 2 fits against the air port of the tire valve 3, reducing the air output of the tire valve 3. In this invention, during inflation, the throttling element 2 is in the first position, and the throttling element 2 is not in contact with the air port of the tire valve 3. Gas enters the tire through the air port of the tire valve 3, the receiving cavity 11, and the air port of the valve core 4. During pressure holding, the throttling element 2 is in the second position, and the throttling element 2 is in contact with the air port of the tire valve 3. Gas needs to enter the air pipe of the tire valve 3 through the valve core 4, the receiving cavity 11, and the throttling element 2. After the gas in the air pipe is emptied, the diaphragm 31 of the tire valve 3 closes, completing the pressure holding. Because the throttling element 2 is in contact with the air port of the tire valve, the air output of the tire valve is reduced. After the gas in the air pipe is quickly emptied, the tire valve 3 closes, improving the pressure holding capacity. At the same time, it avoids the impact of reducing the air pipe diameter on inflation efficiency, ensuring inflation efficiency.

[0042] This utility model provides a pressure-holding device, which includes a guide sealing ring and a throttling element. During inflation, the throttling element is in a first position, not in contact with the air port of the tire valve. Gas enters the tire through the air port of the tire valve, the receiving cavity, and the air port of the valve core. During pressure holding, the throttling element is in a second position, in contact with the air port of the tire valve. Gas must pass through the valve core, the receiving cavity, and the throttling element to enter the air pipe of the tire valve. After the gas in the air pipe is emptied, the diaphragm of the tire valve closes, completing the pressure holding process. Because the throttling element is in contact with the air port of the tire valve, the air output from the tire valve is reduced. The tire valve closes after the gas in the air pipe is quickly emptied, improving the pressure holding capacity and avoiding the impact of reducing the air pipe orifice diameter on inflation efficiency, thus ensuring inflation efficiency.

[0043] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 , Figure 4 and Figure 5 As shown, the throttling device 2 has a body 21 and a step 22. The first end of the body 21 near the tire valve 3 is a fitting structure 211. The first end of the body 21 is provided with a connecting hole 212, which connects the air port of the tire valve 3 and the receiving cavity 11. The step 22 is provided on the second end of the body 21 away from the tire valve 3. The step 22 is also provided with a plurality of vent teeth 222. The plurality of vent teeth 222 are spaced apart and arranged in a circle. The vent groove 221 is provided between two adjacent vent teeth 222. The vent groove 221 connects the air port of the valve core 4 and the receiving cavity 11. In the first position, the fitting structure 211 disengages from the air port of the tire valve 3, and the air port of the tire valve 3 is connected to the air port of the valve core 4 through the vent groove 221. In the second position, the fitting structure 211 engages with the air port of the tire valve 3, and the air port of the tire valve 3 is connected to the air port of the valve core 4 through the connecting hole 212. The throttling device of this invention has a simple structure and is easy to install. By engaging the fitting structure of the throttling device with the air port of the tire valve, gas flows through a connecting hole of a preset diameter, reducing the air output from the tire valve air port, thereby improving pressure holding capacity while ensuring inflation efficiency.

[0044] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 , Figure 4 and Figure 5As shown, the connecting hole 212 is provided with an axial through hole 2121 and a radial through hole 2122. The axial through hole 2121 is located at the first end of the body 21, and the diameter of the axial through hole 2121 is smaller than the air port diameter of the tire valve 3. The radial through hole 2122 is located in the middle of the body 21, and the radial through hole 2122 communicates with the axial through hole 2121 and the receiving cavity 11. In the first position, the throttling element 2 disengages from the air port of the tire valve 3, and the second end of the body 21 abuts against the edge of the air port of the valve core 4. The air port of the tire valve 3 communicates with the air port of the valve core 4 through the vent groove 221. In the second position, the fitting structure 211 engages with the air port of the tire valve 3, and the second end of the body 21 disengages from the edge of the air port of the valve core 4. The air port of the tire valve 3 communicates with the air port of the valve core 4 through the axial through hole 2121 and the radial through hole 2122. The communicating hole structure of this embodiment is simple, and gas flow control is achieved by controlling the diameters of the axial and radial through holes, resulting in high reliability.

[0045] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 2 As shown, the fitting structure 211 is provided with a conical sealing surface 2111, which is adapted to the edge of the air port of the tire valve 3. In this embodiment of the present invention, the conical sealing surface 2111 of the throttling element 2 is parallel to the conical surface of the edge of the air port of the tire valve 3. Under pressure holding conditions, the conical sealing surface 2111 cooperates with the tire valve 3 to improve the sealing performance during pressure holding.

[0046] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 4 As shown, the outer periphery of the fitting structure 211 near the tire valve 3 is provided with a chamfer 2112. The chamfer 2112 reduces the wear of the fitting structure 211 during long-term use and enhances the structural reliability and service life.

[0047] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 2 As shown, the pressure-holding device also includes a spring 5, which is sleeved on the outer periphery of the body 21. One end of the spring 5 abuts against the edge of the air port of the tire valve 3, and the other end abuts against the step 22. In this embodiment, during pressure holding, the gas inside the tire pushes the throttling element 2 to actuate, compressing the spring 5. The throttling element 2 and the tire valve 3 engage, reducing gas leakage. During inflation, the throttling element 2 and the tire valve 3 disengage under the action of the spring 5 and the gas. The spring in this invention achieves the switching between pressure holding and inflation states of the throttling element through its extension and retraction, ensuring the reliability of the pressure-holding device.

[0048] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 As shown, an annular mounting groove 12 is provided on the outer periphery of the guide sealing ring 1 near the tire valve 3. The annular mounting groove 12 is spaced apart from the end face of the guide sealing ring 1. In this embodiment of the present invention, the annular mounting groove 12 is used to cooperate with the tire valve 3 to fix the position of the guide sealing ring. The annular mounting groove 12 is spaced apart from the end face of the guide sealing ring 1 to avoid air leakage caused by the gap between the end face and the tire valve 3, thereby further improving the sealing effect of the guide sealing ring.

[0049] As an optional implementation, in one embodiment of the utility model, the throttling element 2 is an integrally molded structure. The integrally molded throttling element has high stability, ensuring the reliability of the device.

[0050] As an optional implementation, in one embodiment of the utility model, the throttling element 2 is made of plastic material, which is easy to manufacture and has high reliability.

[0051] This utility model embodiment also provides a pressure-holding structure, which includes the aforementioned pressure-holding device. The pressure-holding device includes a guide sealing ring 1 and a throttling element 2. The guide sealing ring 1 is disposed between the air port of the tire valve 3 and the air port of the valve core 4. The guide sealing ring 1 has a receiving cavity 11. The throttling element 2 is slidably disposed in the receiving cavity 11 along the axial direction. When switching from inflation to pressure holding, the throttling element 2 slides from a first position to a second position. The throttling element 2 fits against the air port of the tire valve 3, reducing the air output of the tire valve 3. In this invention, during inflation, the throttling element 2 is in the first position, and the throttling element 2 is not in contact with the air port of the tire valve 3. Gas enters the tire through the air port of the tire valve 3, the receiving cavity 11, and the air port of the valve core 4. During pressure holding, the throttling element 2 is in the second position, and the throttling element 2 is in contact with the air port of the tire valve 3. Gas needs to enter the air pipe of the tire valve 3 through the valve core 4, the receiving cavity 11, and the throttling element 2. After the gas in the air pipe is emptied, the diaphragm 31 of the tire valve 3 closes, completing the pressure holding. Because the throttling element 2 is in contact with the air port of the tire valve, the air output of the tire valve is reduced. After the gas in the air pipe is quickly emptied, the tire valve 3 closes, improving the pressure holding capacity. At the same time, it avoids the impact of reducing the air pipe diameter on inflation efficiency, ensuring inflation efficiency.

[0052] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0053] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A pressure-holding device, characterized in that, include: A guide sealing ring (1) is provided between the air port of the tire valve (3) and the air port of the valve core (4), and a receiving cavity (11) is provided inside the guide sealing ring (1). Throttling element (2), which is slidably disposed in the receiving cavity (11) along the axial direction; When switching from inflation to pressure holding, the throttling element (2) slides from the first position to the second position, and the throttling element (2) is in contact with the air port of the tire valve (3), reducing the air output of the tire valve (3).

2. The pressure-holding device according to claim 1, characterized in that, The throttling element (2) includes: The body (21) has a fitting structure (211) at the first end near the tire valve (3). The first end of the body (21) is provided with a connecting hole (212), which connects the air port of the tire valve (3) and the receiving cavity (11). Step (22), the step (22) is provided on the second end of the body (21) away from the tire valve (3), the step (22) is provided with at least one vent groove (221), the vent groove (221) is connected to the air port of the valve core (4) and the receiving cavity (11); When the throttling element (2) is in the first position, the fitting structure (211) is disengaged from the air port of the tire valve (3), and the air port of the tire valve (3) is connected to the air port of the valve core (4) through the vent groove (221); when the throttling element (2) is in the second position, the fitting structure (211) is engaged with the air port of the tire valve (3), and the air port of the tire valve (3) is connected to the air port of the valve core (4) through the connecting hole (212).

3. The pressure-holding device according to claim 2, characterized in that, The connecting hole (212) includes: An axial through hole (2121) is provided at the first end of the body (21), and the diameter of the axial through hole (2121) is smaller than the air port diameter of the tire valve (3). A radial through hole (2122) is provided in the middle of the body (21), and the radial through hole (2122) communicates with the axial through hole (2121) and the receiving cavity (11).

4. A pressure-holding device according to claim 2, characterized in that, The interlocking structure (211) includes: A conical sealing surface (2111) is adapted to the air port edge of the tire valve (3).

5. A pressure-holding device according to claim 2, characterized in that: The fitting structure (211) has a chamfer (2112) on the outer periphery of one end near the tire valve (3).

6. A pressure-holding device according to claim 2, characterized in that, Also includes: Spring (5), the spring (5) is sleeved on the outer periphery of the body (21), one end of the spring (5) abuts against the edge of the air port of the tire valve (3), and the other end abuts against the step (22).

7. A pressure-holding device according to claim 1, characterized in that: The guide sealing ring (1) has an annular mounting groove (12) on its outer periphery near the tire valve (3), and the annular mounting groove (12) is spaced apart from the end face of the guide sealing ring (1).

8. A pressure-holding device according to claim 1, characterized in that: The throttling element (2) is a one-piece molded structure.

9. A pressure-holding device according to claim 1, characterized in that: The throttling element (2) is made of plastic.

10. A pressure-holding structure, characterized in that, Includes a pressure-holding device as described in any one of claims 1-9.

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