High-pressure air pump

Abstract

The invention relates to the technical field of micro fluid pumps, in particular to a high-pressure air pump which comprises a pump cover, a valve block, a valve seat, a diaphragm, a diaphragm seat, a crank, a base and a driving part. The diaphragm, the valve seat, the valve plate and the pump cover are sequentially installed in the working cavity in the direction away from the guide cavity, the diaphragm seat is connected with the diaphragm and arranged in the guide cavity in a sliding mode, and the crank is driven by the driving piece to drive the diaphragm seat to move in a reciprocating mode. The problem that the service life is shortened due to the fact that a traditional air pump crank drives a diaphragm to deform in multiple directions is solved, the crank drives a guide rail type linear motion, and therefore the air pump has the advantages of being efficient, long in service life and low in noise.

Description

Technical Field

[0001] The present application relates to the technical field of fluid pumps, and in particular to a high-pressure air pump. Background Art

[0002] Fluid pumps are widely used in various devices that require fluid transportation. The fluid medium can be liquid or gas. Fluid pumps use the reciprocating motion of the elastic diaphragm driven by the motor to change the volume of the pump chamber, and cooperate with the one-way valve to achieve fluid suction and discharge.

[0003] When inhaling, the diaphragm moves outward to increase the volume of the pump chamber to form negative pressure, and the external fluid is sucked into the pump chamber in one direction; when exhausting, the diaphragm moves inward to reduce the volume of the pump chamber, increase the pressure, and discharge the fluid in one direction. However, in actual use, the elastic diaphragm is constantly reciprocating and gradually wears out, so that the working efficiency of the fluid pump is reduced or even fails to work. Summary of the invention

[0004] In order to make the pump more efficient and longer-lasting, the purpose of this application is to provide a high-pressure air pump.

[0005] The high-pressure air pump provided in this application adopts the following technical solution: A high-pressure air pump includes a pump cover, a valve plate, a valve seat, a diaphragm, a membrane seat, a crank, a base and a driving member. The base has an installation cavity, a guide cavity and a working cavity. The diaphragm, the valve seat, the valve plate and the pump cover are installed in the working cavity in sequence along a direction away from the guide cavity. The membrane seat is connected to the diaphragm and is slidably arranged in the guide cavity. The crank is driven by the driving member to drive the membrane seat to reciprocate.

[0006] By adopting the above technical solution, the setting of the guide cavity allows the membrane seat to move linearly only along the extension direction of the guide cavity in a slide-like manner. With traditional air pumps, when the crank drives the diaphragm to reciprocate, the diaphragm will deform in multiple directions due to the swing of the end where the crank is connected to the diaphragm, so that the service life of the diaphragm is greatly shortened. The guide cavity and the membrane seat cooperate to keep the direction of the diaphragm deformation as consistent as possible, thereby extending the service life of the pump as a whole, and the gas flow rate changes more evenly during the suction and exhaust of the pump to reduce noise. At the same time, the diaphragm can maintain stable deformation for a longer time, and the pump can of course maintain efficient fluid delivery after long-term use. Therefore, the high-pressure air pump of the present application has the characteristics of high efficiency, long life and low noise.

[0007] Optionally, a rotation limiting platform is provided in the guide cavity, and the membrane seat has a directional sliding portion for cooperating with the rotation limiting platform.

[0008] By adopting the above technical solution, the rotation limiting platform of the guide cavity and the directional sliding part of the membrane seat cooperate to limit the rotation of the membrane seat in the guide cavity, thereby further stabilizing the direction of the diaphragm during deformation.

[0009] Optionally, an auxiliary rotation limiting structure for cooperating with the rotation limiting platform is provided in the installation cavity, and the directional sliding part slides on the auxiliary rotation limiting structure.

[0010] By adopting the above technical solution, the structural part for limiting the rotation of the membrane seat is arranged in the installation cavity, which can effectively reduce the length of the guide cavity, so that the structure of the high-pressure air pump is more compact and the space utilization rate is better.

[0011] Optionally, the high-pressure air pump further comprises a sealing cover, wherein the sealing cover has a sliding limit platform for limiting the sliding of the membrane seat, and the sliding limit platform cooperates with the guide cavity to form a sliding area.

[0012] By adopting the above technical solution, the membrane seat can only slide within the slidable area, which can avoid excessive deformation and damage of the diaphragm caused by excessive movement distance of the membrane seat, thereby extending the service life of the diaphragm and thus extending the overall service life of the pump.

[0013] Optionally, the crank and the driving member are driven by gears.

[0014] By adopting the above technical solution, the gear transmission can reduce the rotation speed of the direct output of the output shaft, and the crank rotation after differential control is more stable.

[0015] Optionally, the gear transmission has a gear ratio of 1:2.

[0016] Optionally, the mounting cavity has at least two mounting ends, each mounting end is configured with a guide cavity and a working cavity, and the number of cranks is adapted to the number of mounting ends.

[0017] By adopting the above technical solution, the pump cover, valve plate, valve seat, diaphragm, membrane seat and crank substantially constitute a working structure for realizing the function. The number of working structures is configured according to the number of mounting ends, thereby further improving work efficiency.

[0018] Optionally, there are two mounting ends, and the two mounting ends are located at two opposite ends of the mounting cavity.

[0019] By adopting the above technical solution, working structures are respectively configured at the two opposite ends, which can improve the stability of the overall structure of the high-pressure air pump and reduce the vibration noise of the high-pressure air pump caused by structural instability.

[0020] Optionally, both ends of the driving member are output ends, and each output end is configured with a base.

[0021] By adopting the above technical solution, a base is allocated to the two output ends, which can effectively improve the output efficiency of the high-pressure air pump. If each base is also configured with two output ends, the high-pressure air pump has four symmetrically distributed working chambers, thereby further improving the stability of the overall structure of the high-pressure air pump and reducing the vibration noise of the high-pressure air pump caused by structural instability.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Compared with the traditional air pump crank, the diaphragm will be deformed in multiple directions, resulting in a shortened service life. The setting of the guide cavity in the present application allows the membrane seat to move linearly in a sliding rail only along the extension direction of the guide cavity, so that the direction of the diaphragm deformation remains as consistent as possible, thereby extending the service life of the pump as a whole. The gas flow rate changes more evenly during the suction and exhaust of the pump to reduce noise. At the same time, the diaphragm can maintain stable deformation for a longer time. After long-term use, the pump can of course maintain efficient fluid delivery; 2. The rotation limit table of the guide cavity and the directional sliding part of the membrane seat cooperate to limit the rotation of the membrane seat in the guide cavity, thereby further stabilizing the direction of the diaphragm deformation. The structural part for limiting the rotation of the membrane seat is arranged in the installation cavity, which can effectively reduce the length of the guide cavity, so that the structure of the high-pressure air pump is more compact and the space utilization rate is better; 3. The pump cover, valve plate, valve seat, diaphragm, membrane seat and crank essentially constitute a working structure for realizing the function. The number of working structures is configured according to the number of mounting ends, thereby further improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic cross-sectional structural diagram of a three-dimensional state of an embodiment of the present application; Figure 3 is a schematic diagram of a cross-sectional structure of an embodiment of the present application in a top-down state; Figure 4 It is a schematic diagram of the cross-sectional structure of the functional parts of the embodiment of the present application.

[0024] In the figure: 1. driving part; 11. driving motor; 12. output gear; 2. functional part; 21. pump cover; 22. valve plate; 221. inlet check valve; 222. outlet check valve; 23. valve seat; 24. diaphragm; 241. capsule; 242. mounting edge; 243. connecting part; 25. membrane seat; 251. clamping part; 252. directional sliding part; 26. crank; 261. eccentric wheel; 27. base; 271. mounting cavity; 2711. auxiliary rotation limiting structure; 272. guide cavity; 273. working cavity; 28. cover; 281. sliding limit table. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 , further details of this application are given.

[0026] The embodiment of the present application discloses a high-pressure air pump. The fluid of the high-pressure air pump of the present application can be gas or liquid. Although the description and claims of the present application use the description that the fluid is gas, the case where liquid is the transmission medium is within the protection scope of the present application.

[0027] Reference Figure 1 and Figure 2 A high-pressure air pump includes a driving component 1 and a functional component 2, wherein the functional component 2 is used to realize fluid transportation, and the driving component 1 is used to provide power to enable the functional component 2 to operate.

[0028] The driving component 1 includes a driving motor 11, a driving gear and an output gear 12. The end of the driving motor 11 where the output shaft is located is the output end. According to actual design requirements, the number of output shafts can be one or two, that is, the number of output ends can be one or two, and a functional component 2 is configured on each output end. A driving gear is configured on the output shaft of the driving motor 11, and the output gear 12 meshing with the driving gear is installed on the functional component 2. In this embodiment, the number of the output ends of the driving motor 11 is two, and they are located at both ends of the axial direction of the driving motor 11. One driving motor 11 can drive all the functional components 2 to work.

[0029] Reference Figure 2 and Figure 3 The functional part 2 includes a pump cover 21, a valve plate 22, a valve seat 23, a diaphragm 24, a membrane seat 25, a crank 26, a base 27 and a cover 28, wherein the pump cover 21, the valve plate 22, the valve seat 23, the diaphragm 24, the membrane seat 25 and the crank 26 substantially constitute a working structure for realizing the fluid conveying function.

[0030] The base 27 is fixedly arranged at the output end corresponding to the drive motor 11, and the output shaft and the drive gear of the drive motor 11 extend into the base 27. The base 27 has an installation opening, and the cover 28 is installed in the installation opening. The installation opening is mainly used to facilitate the installation of the working structure.

[0031] The base 27 has a mounting cavity 271, a guide cavity 272 and a working cavity 273. The area where the output shaft of the driving motor 11 is located is the mounting cavity 271, and the output gear 12 is rotatably connected to the mounting cavity 271. The mounting cavity 271 has at least one mounting end, each mounting end is configured with a guide cavity 272, each guide cavity 272 is configured with a working cavity 273, and the working cavity 273 is located on the side of the corresponding guide cavity 272 away from the mounting cavity 271. Each working cavity 273 is configured with a set of working structures. In this embodiment, the number of mounting ends is two, and the two mounting ends are located at opposite ends of the mounting cavity 271.

[0032] Reference Figure 3 and Figure 4For the convenience of description, the following will take one set of working structures as an example.

[0033] In the working chamber 273, the membrane seat 25, the valve seat 23, the valve plate 22 and the pump cover 21 are sequentially installed in a direction away from the installation chamber 271. The valve seat 23 and the pump cover 21 form two mutually isolated inlet channels and outlet channels through the valve plate 22. The valve plate 22 has an inlet check valve 221 and an outlet check valve 222. The inlet check valve 221 is located in the inlet channel, and the outlet check valve 222 is located in the outlet channel.

[0034] The diaphragm 24 is made of rubber and has elasticity. The diaphragm 24 includes a capsule 241 and a mounting edge 242 arranged around the capsule 241. The mounting edge 242 is pressed by the valve seat 23 and installed in the working chamber 273. A gas flow area is formed between the capsule 241 and the valve seat 23, and the air inlet channel and the air outlet channel are both unidirectionally connected to the gas flow area. The capsule 241 can move in a direction close to or away from the mounting chamber 271 to change the volume of the gas flow area, thereby realizing unidirectional flow of the fluid.

[0035] In order to ensure the stability of the deformation direction of the capsule 241, the cooperation between the membrane seat 25 and the guide cavity 272 is a guide rail-type sliding. Specifically, the capsule 241 has a connecting portion 243 at one end facing the installation cavity 271, and the valve seat 23 includes a clamping portion 251 for clamping with the connecting portion 243 and a directional sliding portion 252 for sliding connection with the guide cavity 272. There is a rotation limiter in the guide cavity 272, and the rotation limiter extends along the sliding direction of the membrane seat 25. The directional sliding portion 252 cooperates with the rotation limiter to limit the rotation of the membrane seat 25 in the guide cavity 272. Specifically, when the guide cavity 272 is a circular hole, the rotation limiter is a raised table-like structure on the inner wall of the guide cavity 272, so that the cross-section of the guide cavity 272 is not circular.

[0036] An auxiliary rotation limiting structure 2711 for cooperating with the rotation limiting table is provided in the installation cavity 271. The auxiliary rotation limiting structure 2711 can be a table-shaped structure whose table surface is flush with the rotation limiting table. The auxiliary rotation limiting structure 2711 can be integrally formed with the rotation limiting table. The connecting portion 243 always slides in the guide cavity 272, and the end of the directional sliding portion 252 away from the capsule 241 can slide out of the guide cavity 272. After the end of the directional sliding portion 252 slides out of the guide cavity 272, it will continue to slide on the auxiliary rotation limiting structure 2711. At this time, the auxiliary rotation limiting structure 2711 restricts the rotation of the portion of the directional sliding portion 252 that is separated from the guide cavity 272.

[0037] The rotation limiting table cooperates with the auxiliary rotation limiting structure 2711, so that the membrane seat 25 can stably move in a linear manner along the extension direction of the guide cavity 272, so that the direction of the diaphragm 24 deformation remains as consistent as possible and the deformation of the diaphragm 24 is reduced, thereby extending the service life of the entire pump.

[0038] The cover 28 has a sliding limit table 281 for limiting the sliding of the membrane seat 25, and the sliding limit table 281 cooperates with the guide cavity 272 to form a sliding area. After the end of the directional sliding part 252 slides out of the guide cavity 272, it can slide to the point where it contacts the sliding limit table 281 at most. The directional sliding part 252 that contacts the sliding limit table 281 cannot move in a direction away from the working cavity 273, thereby reducing the shortening of the service life of the diaphragm 24 due to excessive deformation.

[0039] A crank 26 is included in a set of working structures, one end of the crank 26 is rotatably connected to the directional sliding part 252, and the other end of the crank 26 is connected to the output gear 12 via an eccentric wheel 261. When the output gear 12 rotates one circle, the crank 26 performs a reciprocating swing with the rotation axis connected to the directional sliding part 252 as the center, thereby driving the membrane seat 25 to complete a reciprocating linear sliding along the guide cavity 272 like a guide rail.

[0040] The implementation principle of a high-pressure air pump in the embodiment of the present application is as follows: when inhaling, the crank 26 drives the membrane seat 25 to move in a direction away from the working chamber 273, the volume of the gas flow area of ​​the capsule 241 increases, the inlet flow channel inhales air and the outlet flow channel is closed under the action of the outlet check valve 222; when exhausting, the crank 26 drives the membrane seat 25 to move in a direction close to the working chamber 273, the volume of the gas flow area of ​​the capsule 241 decreases, the inlet flow channel is closed under the action of the inlet check valve 221 and the outlet flow channel is opened, and the gas is discharged, thereby completing the sequential gas delivery. The existence of multiple working structures allows one group of working structures to exhaust air when another group of working structures exhaust air, thereby improving the working efficiency of the high-pressure air pump.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-pressure air pump, characterized in that: The invention comprises a pump cover (21), a valve plate (22), a valve seat (23), a diaphragm (24), a membrane seat (25), a crank (26), a base (27) and a driving member (1); the base (27) has an installation cavity (271), a guide cavity (272) and a working cavity (273); the diaphragm (24), the valve seat (23), the valve plate (22) and the pump cover (21) are sequentially installed in the working cavity (273) along a direction away from the guide cavity (272); the membrane seat (25) is connected to the diaphragm (24) and is slidably arranged in the guide cavity (272); the crank (26) is driven by the driving member (1) to drive the membrane seat (25) to reciprocate.

2. A high-pressure air pump according to claim 1, characterized in that: The guide cavity (272) has a rotation limiting platform in it, and the membrane seat (25) has a directional sliding portion (252) for cooperating with the rotation limiting platform.

3. A high-pressure air pump according to claim 2, characterized in that: An auxiliary rotation limiting structure (2711) for cooperating with the rotation limiting platform is arranged in the installation cavity (271), and the directional sliding portion (252) slides on the auxiliary rotation limiting structure (2711).

4. A high-pressure air pump according to claim 1, characterized in that: The high-pressure air pump further comprises a sealing cover (28), wherein the sealing cover (28) has a sliding limit platform (281) for limiting the sliding of the membrane seat (25), and the sliding limit platform (281) cooperates with the guide cavity (272) to form a sliding area.

5. A high-pressure air pump according to claim 1, characterized in that: The crank (26) and the driving member (1) are driven by gears.

6. A high-pressure air pump according to claim 5, characterized in that: The gear ratio of the gear transmission is 1:

2.

7. A high-pressure air pump according to claim 1, characterized in that: The mounting cavity (271) has at least two mounting ends, each mounting end is provided with a guide cavity (272) and a working cavity (273), and the number of the cranks (26) matches the number of the mounting ends.

8. A high-pressure air pump according to claim 7, characterized in that: The number of the mounting ends is two, and the two mounting ends are located at two opposite ends of the mounting cavity (271).

9. A high-pressure air pump according to claim 1, characterized in that: Both ends of the driving member (1) are output ends, and a base (27) is disposed on each output end.

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