Diaphragm pump

Abstract

The invention relates to the technical field of diaphragm pumps, in particular to a diaphragm pump which comprises a motor, a pump body, a clutch gear assembly and a diaphragm suction and discharge assembly, the motor is installed on the outer wall of the pump body, an output shaft of the motor penetrates through the outer wall of the pump body, the clutch gear assembly is installed in the pump body, and the diaphragm suction and discharge assembly is installed in the pump body. An output shaft of the motor is connected with one end of the clutch gear assembly, the diaphragm suction and discharge assembly is installed on the pump body, the other end of the clutch gear assembly is connected with the diaphragm suction and discharge assembly, and the clutch gear assembly is used for driving the diaphragm suction and discharge assembly to conduct suction and discharge. The problem that the eccentric wheel easily shakes in the radial direction in the rotating process is solved, and precision and reliability of the diaphragm pump are improved.

Description

Technical Field

[0001] This application relates to the technical field of diaphragm pumps, and in particular to a diaphragm pump. Background Technology

[0002] Miniature diaphragm pumps, as key fluid transport components in industrial automation and precision manufacturing processes, are increasingly widely used in various fields such as industrial and agricultural production, environmental monitoring, medical equipment, and analytical instruments. With the continuous improvement of industrial automation levels, the performance requirements for diaphragm pumps are also gradually increasing, especially regarding their output stability, operational reliability, and consistency under long-term operating conditions. In the current miniature diaphragm pump technology system, the design of the transmission structure directly affects the pump's core performance. Currently, eccentric wheel transmission is commonly used, where a motor drives the eccentric wheel to rotate, converting the rotational motion into the reciprocating linear motion of the diaphragm, thereby achieving fluid intake and discharge.

[0003] However, in practical applications, existing diaphragm pumps are prone to unexpected radial swaying due to the asymmetrical geometry and force characteristics of the eccentric wheel during continuous rotation. This radial swaying is directly transmitted to the connected push rod and diaphragm assembly, causing fluctuations in the diaphragm's agitation stroke in each working cycle, making it difficult to maintain consistency. This decrease in stroke consistency not only affects the stability of instantaneous flow and pressure but also causes additional vibration and noise, accelerates the wear of key components, and restricts the overall pump performance and the accuracy of test results. These problems need to be solved. Summary of the Invention

[0004] To address the problem of radial wobble during eccentric wheel rotation and improve the accuracy and reliability of diaphragm pumps, this application provides a diaphragm pump employing the following technical solution: This application provides a diaphragm pump, including a motor, a pump body, a clutch gear assembly, and a diaphragm suction and discharge assembly; The motor is mounted outside the pump body, and its output shaft extends into the pump body; The clutch gear assembly includes a first clutch gear, a second clutch gear, and a spring. The first clutch gear is coaxially connected to the output shaft of the motor. One end of the second clutch gear is detachably connected to the first clutch gear, and the other end of the second clutch gear is connected to the diaphragm suction and discharge assembly. The spring is disposed between the second clutch gear and the pump body. The motor drives the diaphragm suction and discharge assembly to reciprocate through the clutch gear assembly to perform suction and discharge.

[0005] Preferably, the first clutch gear and the second clutch gear have toothed surfaces at opposite ends, and the first clutch gear and the second clutch gear mesh through the toothed surfaces. The first clutch gear is used to drive the second clutch gear to perform axial displacement by rotating.

[0006] Preferably, the axial displacement distance of the second clutch gear is equal to the depth of the tooth surface.

[0007] Preferably, the first clutch gear and the second clutch gear are provided with inclined surfaces at opposite ends, and the first clutch gear and the second clutch gear abut against each other through the inclined surfaces. The first clutch gear is used to drive the second clutch gear to perform axial displacement by rotating.

[0008] Preferably, the pump body is provided with a limiting hole for limiting the second clutch gear, and the second clutch gear is slidably connected to the limiting hole.

[0009] Preferably, the diaphragm suction and discharge assembly includes a diaphragm and a suction and discharge component. The suction and discharge component is connected to the end of the pump body away from the motor. The diaphragm is installed between the suction and discharge component and the pump body. The diaphragm is fixedly connected to the second clutch gear.

[0010] Preferably, the suction and discharge component includes a first cavity, a second cavity, a sealing ring, and at least two umbrella valves. The first cavity is connected to the end of the pump body away from the motor. The diaphragm is installed between the first cavity and the pump body. The second cavity is fixedly connected to the end of the first cavity away from the pump body. The sealing ring is installed between the first cavity and the second cavity. The first cavity is provided with an air passage for connecting both ends. The umbrella valves are installed in the air passage.

[0011] Preferably, the pump body is provided with a working chamber, and the diaphragm is located between the working chamber and the first chamber.

[0012] Preferably, the first cavity is provided with a driving cavity, the driving cavity is located on the side of the diaphragm away from the working cavity, and the driving cavity is connected to the second cavity through the air passage; The second cavity is provided with an inhalation cavity and an exhaust cavity. The inhalation cavity and the exhaust cavity both extend through both ends of the second cavity, and the inhalation cavity and the exhaust cavity are connected to the drive cavity through the air passage.

[0013] Preferably, the umbrella valve includes a fixing part and an opening / closing part. The fixing part is fixedly connected to the air passage. The opening / closing part of at least one umbrella valve abuts against one end of the air passage near the drive chamber, and the opening / closing part of at least one umbrella valve abuts against one end of the air passage near the discharge chamber.

[0014] In summary, compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following: This application utilizes a clutch gear assembly within the pump body, driven by a motor, to perform reciprocating motion. This clutch gear assembly drives the diaphragm suction and discharge assembly to repeatedly draw in and discharge gas or liquid. The motor drives the first clutch gear of the clutch gear assembly to rotate, causing a change in the axial position of the second clutch gear. A spring then resets the second clutch gear, enabling repeated intake and discharge of external gas or liquid. The clutch gear assembly reduces the shaking during operation, solves the problem of radial sway during eccentric wheel rotation, and improves the accuracy and reliability of the diaphragm pump. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a diaphragm pump as described in an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the clutch gear assembly described in the embodiments of this application.

[0017] Figure 3 This is a schematic diagram of the diaphragm suction and discharge assembly described in the embodiments of this application.

[0018] Figure 4 This is a schematic diagram of the umbrella valve described in the embodiments of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Motor; 2. Pump body; 21. Limiting hole; 22. Working chamber; 3. Clutch gear assembly; 31. First clutch gear; 32. Second clutch gear; 33. Spring; 34. Tooth surface; 4. Diaphragm suction and discharge assembly; 41. Diaphragm; 42. Suction and discharge component; 421. First chamber; 4211. Air passage; 4212. Drive chamber; 422. Second chamber; 4221. Suction chamber; 4222. Discharge chamber; 423. Sealing ring; 424. Umbrella valve; 4241. Fixing part; 4242. Opening and closing part. Detailed Implementation

[0020] The following combination Figures 1-4 The present application will be described in further detail below. The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0021] Reference Figure 1 The diaphragm pump involved in this application includes a motor 1, a pump body 2, a clutch gear assembly 3, and a diaphragm suction and discharge assembly 4; Motor 1 is installed outside pump body 2, and its output shaft extends into pump body 2; The clutch gear assembly 3 includes a first clutch gear 31, a second clutch gear 32 and a spring 33. The first clutch gear 31 is coaxially connected to the output shaft of the motor 1. One end of the second clutch gear 32 is detachably connected to the first clutch gear 31, and the other end of the second clutch gear 32 is connected to the diaphragm suction and discharge assembly 4. The spring 33 is disposed between the second clutch gear 32 and the pump body 2. Motor 1 drives diaphragm suction and discharge assembly 4 to reciprocate through clutch gear assembly 3 for suction and discharge.

[0022] Specifically, this application fixes the position of the motor 1 externally to the pump body 2. The motor 1 drives one end of the clutch gear assembly 3 inside the pump body 2 to rotate via its output shaft, thereby causing the other end of the clutch gear assembly 3 to reciprocate. Specifically, the motor 1 causes the first clutch gear 31 to rotate, which in turn causes the second clutch gear 32 to reciprocate axially. The second clutch gear 32 drives the diaphragm suction and discharge assembly 4 to repeatedly suck in and discharge, realizing the repeated sucking in and discharge of external gas or liquid. The clutch gear assembly 3 reduces the shaking caused by the operation process, solves the problem of radial shaking that easily occurs during the rotation of the eccentric wheel, and improves the accuracy and reliability of the diaphragm pump.

[0023] This application replaces the traditional eccentric wheel transmission with a clutch gear assembly 3, and uses an internal spring 33 to achieve reset, so as to realize the precise reciprocating agitation of the diaphragm 41 of the diaphragm suction and discharge assembly 4. This effectively solves the problem of radial swaying that easily occurs during the rotation of the eccentric wheel in the prior art. It also has the advantages of compact structure, strong adaptability and low maintenance cost, providing a new path for the structural upgrade of micro diaphragm pumps.

[0024] In one embodiment, the first clutch gear 31 and the second clutch gear 32 are provided with tooth surfaces 34 at opposite ends. The first clutch gear 31 and the second clutch gear 32 mesh through the tooth surfaces 34. The first clutch gear 31 is used to drive the second clutch gear 32 to make axial displacement by rotating.

[0025] Reference Figure 2Specifically, in this embodiment, the reciprocating motion of the diaphragm suction and discharge assembly 4 is achieved through a first clutch gear 31 and a second clutch gear 32. The motor 1 drives the first clutch gear 31 to rotate. One end of the first clutch gear 31 abutting against the second clutch gear 32 has a structure that causes the second clutch gear 32 to move axially. Specifically, the first clutch gear 31 and the second clutch gear 32 have tooth surfaces 34 facing each other. The tooth surfaces 34 are specifically used to enable the first clutch gear 31 and the second clutch gear 32 to mesh with each other. The tooth surfaces 34 of the first clutch gear 31 and the second clutch gear 32 have different shapes. Each tooth of the first tooth surface 34 of the first clutch gear 31 can engage with the second clutch gear 32. Between the tooth gaps of the two second tooth surfaces 34 of the dual-clutch gear 32, when the first tooth surface 34 rotates, due to the curved design of one side, the first tooth surface 34 gradually disengages from the tooth gap of the second tooth surface 34. Meanwhile, the position of the first clutch gear 31 remains unchanged, and the second clutch gear 32 does not rotate, allowing the second clutch gear 32 to move axially. Therefore, the first clutch gear 31 pushes the second clutch gear 32 away from the first clutch gear 31, causing the second clutch gear 32 to compress the diaphragm 41. At this time, the suction / discharge component 42 discharges gas or liquid. When the contact surface between the first tooth surface 34 and the second tooth surface 34 reaches its apex, the first clutch gear 31 rotates again. With the help of the spring force 33, the first tooth surface 34 re-engages with the tooth gap between the second tooth surface 34. At this time, the second clutch gear 32 resets, and the suction / discharge component 42 sucks up gas or liquid. During the process, the first clutch gear 31 and the second clutch gear 32 are always in contact. The first clutch gear 31 applies a downward force to the second clutch gear 32. Through the change in the position of the tooth surface 34, the second clutch gear 32 undergoes a positional change, specifically an axial change. During this process, the second clutch gear 32 does not rotate. The spring 33 consistently applies a force to the second clutch gear 32 in the direction of the first clutch gear 31. The second clutch gear 32 is reset by the spring 33, thus achieving the effect of transmission and reciprocating motion. The second clutch gear 32 is fixedly connected to the soft material that needs to be adjusted in the diaphragm suction and discharge assembly 4, causing a change in the internal pressure of the diaphragm suction and discharge assembly 4, ultimately achieving the intake and discharge of external gas or liquid.

[0026] In one embodiment, the first clutch gear 31 and the output shaft of the motor 1 are interference-fitted to achieve synchronous rotation. The second clutch gear 32 is rigidly connected to the diaphragm 41 of the diaphragm suction and discharge assembly 4 by screws.

[0027] In one embodiment, the axial displacement distance of the second clutch gear 32 is equal to the depth of the tooth surface 34.

[0028] Specifically, in the case of the second clutch gear 32 moving up and down in this embodiment, the displacement distance is determined by the depth of the tooth surface 34 provided by the first clutch gear 31 or the second clutch gear 32. When the first clutch gear 31 rotates, the tooth surface 34 of the first clutch gear 31 gradually disengages from the tooth surface 34 of the second clutch gear 32 until the tops of the two tooth surfaces 34 contact each other. At this time, the second clutch gear 32 is displaced by a tooth depth. The depth of the tooth surface 34 specifically determines the throughput of the diaphragm suction and discharge assembly 4 to external liquid or gas.

[0029] In one embodiment, the first clutch gear 31 and the second clutch gear 32 are provided with inclined surfaces at opposite ends, and the first clutch gear 31 and the second clutch gear 32 abut against each other through the inclined surfaces. The first clutch gear 31 is used to drive the second clutch gear 32 to make axial displacement by rotating.

[0030] Specifically, in this embodiment, the first clutch gear 31 abuts against the inclined surface of the second clutch gear 32. As the first clutch gear 31 rotates, the inclined surfaces gradually disengage until the tips of the first clutch gear 31 and the second clutch gear 32 contact each other. Due to the opposing force applied by the spring, the first clutch gear 31 rotates again, and the second clutch gear 32 gradually returns to its original position until the inclined surfaces of the first clutch gear 31 and the second clutch gear 32 fully abut against each other again.

[0031] The axial displacement distance of the second clutch gear 32 in this embodiment is the depth of the inclined plane.

[0032] In one embodiment, the pump body 2 is provided with a limiting hole 21 for limiting the second clutch gear 32, and the second clutch gear 32 is disposed in the limiting hole 21.

[0033] Specifically, in this embodiment, the pump body 2 is composed of a pump body 2 cover and a pump body. The pump body 2 cover and the pump body are fixedly connected to form an internal cavity, which is used to reserve a placement position for the clutch gear assembly 3. The motor 1 is fixedly connected to the outside of the pump body 2 cover, and the diaphragm suction and discharge assembly 4 is fixedly connected to the outside of the pump body. The output shaft of the motor 1 passes through the pump body 2 cover to the cavity and connects to the first clutch gear 31. The pump body is provided with a limiting hole 21, and the second clutch gear 32 is provided in the limiting hole 21, so that the second clutch gear 32 can move in the axial direction. The spring 33 abuts against the second clutch gear 32 and the inner wall of the cavity, specifically the inner wall of the cavity facing the side connected to the diaphragm suction and discharge assembly 4. When the first clutch gear 31 drives the second clutch gear 32 to move away from the first clutch gear 31, the spring 33 is compressed. When the contact point of the first clutch gear 31 and the second clutch gear 32 reaches the top, the second clutch gear 32 moves towards the first clutch gear 31 under the action of the spring 33. During this period, the first clutch gear 31 and the second clutch gear 32 always remain in contact.

[0034] In one embodiment, the diaphragm suction and discharge assembly 4 includes a diaphragm 41 and a suction and discharge component 42. The suction and discharge component 42 is connected to the end of the pump body 2 away from the motor 1. The diaphragm 41 is installed between the suction and discharge component 42 and the pump body 2. The diaphragm 41 is fixedly connected to the second clutch gear 32.

[0035] Reference Figure 3 Specifically, in this embodiment, a fixing part 4241 is provided around the diaphragm 41, and a fixing groove for placing the fixing part 4241 is provided at the connection between the pump body 2 and the suction / discharge component 42. The fixing part 4241 is interference-fitted into the groove, so that the diaphragm 41 is installed between the pump body 2 and the suction / discharge component 42 through the fixing part 4241, achieving a certain degree of isolation between the two ends. The diaphragm 41 is fixed to the end of the second clutch gear 32 away from the first clutch gear 31 by screws. The first clutch gear 31 and the second clutch gear 32 abut against each other by meshing. During the reciprocating motion of the first clutch gear 31 driving the second clutch gear 32, the middle part of the diaphragm 41 will be squeezed or released. The deformation of the diaphragm 41 causes pressure changes in the working chamber 22 and the driving chamber 4212.

[0036] In one embodiment, the suction and discharge component 42 includes a first cavity 421, a second cavity 422, a sealing ring 423, and at least two umbrella valves 424. The first cavity 421 is connected to the end of the pump body 2 away from the motor 1. A diaphragm 41 is installed between the first cavity 421 and the pump body 2. The second cavity 422 is fixedly connected to the end of the first cavity 421 away from the pump body 2. The sealing ring 423 is installed between the first cavity 421 and the second cavity 422. The first cavity 421 is provided with an air passage 4211 for connecting both ends. The umbrella valves 424 are installed in the air passage 4211.

[0037] Specifically, in this embodiment, the first cavity 421 and the second cavity 422 are external structural components of the suction and discharge component 42 with an internal cavity structure. The first cavity 421, as the upper cavity, is fixedly connected to the pump body 2 by means of snap-fit, fastening, bolting, welding, etc. The pump body 2 and the internal cavity of the first cavity 421 are separated by the diaphragm 41, so that when the diaphragm 41 is compressed by the second clutch gear 32, the internal space of the first cavity 421 is compressed.

[0038] The first cavity 421 and the second cavity 422 are fixedly connected, and in order to reduce air leakage at the connection between the first cavity 421 and the second cavity 422, a sealing ring 423 is installed at the connection between the first cavity 421 and the second cavity 422.

[0039] The air passage 4211 connects the first cavity 421 and the second cavity 422, so that when the force applied by the diaphragm 41 acts on the first cavity 421, the second cavity 422 can suck in or expel external gas or liquid.

[0040] An umbrella valve 424 is installed in the air passage 4211 so that when the diaphragm 41 applies force to the first cavity 421, the umbrella valve 424 can limit whether each air passage 4211 is opened or closed.

[0041] In one embodiment, two air passages 4211 are provided, and two umbrella valves 424 are also provided corresponding to the air passages 4211. The two umbrella valves 424 are installed in different orientations within the air passages 4211, one from the direction of the first cavity 421 and the other from the direction of the second cavity 422. When the diaphragm 41 applies force to the first cavity 421, one umbrella valve 424 closes one air passage 4211, preventing airflow from the corresponding portion of the second cavity 422. Conversely, the other umbrella valve 424 opens the other air passage 4211, allowing airflow from the corresponding portion of the second cavity 422. When the diaphragm 41 applies a reverse force to the first cavity 421, one umbrella valve 424 opens one air passage 4211, allowing airflow from the corresponding portion of the second cavity 422. The other umbrella valve 424 closes the other air passage 4211, preventing airflow from the corresponding portion of the second cavity 422. This allows for the absorption and discharge of external liquids or gases.

[0042] The number of air passages 4211 and umbrella valves 424 in this embodiment of the application is not limited to two. Each air passage 4211 is matched with an umbrella valve 424 with a certain installation direction, and can only be sucked in, discharged or closed at the same time. Multiple air passages 4211 can increase the suction and discharge capacity of the diaphragm pump.

[0043] In one embodiment, the pump body 2 is provided with a working chamber 22, and the diaphragm 41 is located between the working chamber 22 and the first chamber 421.

[0044] Specifically, in this embodiment, the working cavity 22 is a cavity for placing the diaphragm 41. When the first clutch gear 31 and the second clutch gear 32 are engaged, the diaphragm 41 will deform to a certain extent into the space inside the pump body 2. The working cavity 22 provides a place for the diaphragm 41, so that the diaphragm 41 can deform and work normally.

[0045] In one embodiment, the first cavity 421 is provided with a driving cavity 4212, which is located on the side of the diaphragm 41 away from the working cavity 22. The driving cavity 4212 is connected to the second cavity 422 through the air passage 4211.

[0046] Specifically, in this embodiment, the drive cavity 4212 is a cavity that directly receives the pressure change caused by the deformation of the diaphragm 41. It provides a position for the diaphragm 41 to move closer to and deform into the first cavity 421, so that when the internal pressure of the first cavity 421 changes, the gas inside can circulate through the air passage 4211. The drive cavity 4212 is used to temporarily store the gas or liquid sucked in by the suction and discharge member 42, and to discharge the gas or liquid inside the drive cavity 4212 when the second clutch gear 32 performs the next step.

[0047] In one embodiment, the second cavity 422 is provided with an intake cavity 4221 and an exhaust cavity 4222. The intake cavity 4221 and the exhaust cavity 4222 respectively pass through both ends of the second cavity 422, and the intake cavity 4221 and the exhaust cavity 4222 are connected to the drive cavity 4212 through the air passage 4211.

[0048] Specifically, in this embodiment, the inhalation chamber 4221 and the discharge chamber 4222 have the same structure, both being cavities within the second cavity 422. The inhalation chamber 4221 and the discharge chamber 4222 are connected to the drive chamber 4212 via an air passage 4211. The inhalation chamber 4221 and the discharge chamber 4222 are isolated from each other within the second cavity 422, and the cavities are separated by a partition or other partition structure, so that the liquid and gas inhaled in the inhalation chamber 4221 will not flow directly into the discharge chamber 4222, and the liquid and gas discharged from the discharge chamber 4222 will not flow directly into the inhalation chamber 4221.

[0049] In this embodiment of the application, the inhalation chamber 4221 and the discharge chamber 4222 achieve the function of inhalation or discharge through umbrella valves 424 with different installation directions.

[0050] In one embodiment, the umbrella valve 424 includes a fixing part 4241 and an opening and closing part 4242. The fixing part 4241 is fixedly connected to the air passage 4211. The opening and closing part 4242 of at least one umbrella valve 424 abuts against one end of the air passage 4211 near the drive chamber 4212, and the opening and closing part 4242 of at least one umbrella valve 424 abuts against one end of the air passage 4211 near the discharge chamber 4222.

[0051] Reference Figure 4 Specifically, the umbrella valve 424 in this embodiment is an integrally formed structure of a fixing part 4241 and an opening / closing part 4242, made of soft material such as soft rubber. The fixing part 4241 mainly abuts the opening / closing part 4242 against one end of the driving chamber 4212 or one end of the discharge chamber 4222 of the first cavity 421. When the fixing part 4241 is fixed to the air passage 4211, it will not completely block the air passage 4211, so that the air passage 4211 still has the effect of gas or liquid flow. By installing the opening / closing part 4242 in different directions, the air passage 4211 can have different working states under different working conditions of the diaphragm 41.

[0052] When the diaphragm 41 is compressed into the working chamber 22, the umbrella valve 4242, which abuts against one end of the drive chamber 4212, is under pressure and remains pressed against the air passage 4211, keeping the air passage 4211 tightly closed. Meanwhile, the umbrella valve 4242, which abuts against one end of the discharge chamber 4222, is under pressure and deforms towards the discharge chamber 4222, causing the air passage 4211 to open and allowing the liquid or gas from the drive chamber 4212 to be discharged from the discharge chamber 4222.

[0053] When the diaphragm 41 deforms in the reverse direction towards the working chamber 22, the umbrella valve 4242, which abuts against one end of the drive chamber 4212, deforms inward towards the drive chamber 4212 due to pressure, opening the air passage 4211 and drawing liquid or gas from outside the suction chamber 4221 into the drive chamber 4212. Meanwhile, the umbrella valve 4242, which abuts against one end of the discharge chamber 4222, remains pressed against the air passage 4211 due to pressure, keeping the air passage 4211 closed and preventing liquid or gas from being directly discharged from the discharge chamber 4222. This achieves the suction and discharge of the diaphragm pump.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A diaphragm pump, characterized in that, It includes a motor (1), a pump body (2), a clutch gear assembly (3), and a diaphragm suction and discharge assembly (4); The motor (1) is installed outside the pump body (2), and its output shaft extends into the pump body (2); The clutch gear assembly (3) includes a first clutch gear (31), a second clutch gear (32), and a spring (33). The first clutch gear (31) is coaxially connected to the output shaft of the motor (1). One end of the second clutch gear (32) is detachably connected to the first clutch gear (31), and the other end of the second clutch gear (32) is connected to the diaphragm suction and discharge assembly (4). The spring (33) is disposed between the second clutch gear (32) and the pump body (2). The motor (1) drives the diaphragm suction and discharge assembly (4) to reciprocate through the clutch gear assembly (3) to perform suction and discharge.

2. The diaphragm pump according to claim 1, characterized in that, The first clutch gear (31) and the second clutch gear (32) are provided with tooth surfaces (34) at opposite ends. The first clutch gear (31) and the second clutch gear (32) mesh through the tooth surfaces (34). The first clutch gear (31) is used to drive the second clutch gear (32) to make axial displacement by rotating.

3. The diaphragm pump according to claim 2, characterized in that, The axial displacement distance of the second clutch gear (32) is the depth of the tooth surface (34).

4. The diaphragm pump according to claim 1, characterized in that, The first clutch gear (31) and the second clutch gear (32) are provided with inclined surfaces at opposite ends. The first clutch gear (31) and the second clutch gear (32) abut against each other through the inclined surfaces. The first clutch gear (31) is used to drive the second clutch gear (32) to make axial displacement by rotating.

5. The diaphragm pump according to claim 1, characterized in that, The pump body (2) is provided with a limiting hole (21) for limiting the second clutch gear (32), and the second clutch gear (32) is slidably connected to the limiting hole (21).

6. The diaphragm pump according to claim 1, characterized in that, The diaphragm suction and discharge assembly (4) includes a diaphragm (41) and a suction and discharge component (42). The suction and discharge component (42) is connected to the end of the pump body (2) away from the motor (1). The diaphragm (41) is installed between the suction and discharge component (42) and the pump body (2). The diaphragm (41) is fixedly connected to the second clutch gear (32).

7. The diaphragm pump according to claim 6, characterized in that, The suction and discharge component (42) includes a first cavity (421), a second cavity (422), a sealing ring (423), and at least two umbrella valves (424). The first cavity (421) is connected to the end of the pump body (2) away from the motor (1). The diaphragm (41) is installed between the first cavity (421) and the pump body (2). The second cavity (422) is fixedly connected to the end of the first cavity (421) away from the pump body (2). The sealing ring (423) is installed between the first cavity (421) and the second cavity (422). The first cavity (421) is provided with an air passage (4211) for connecting both ends. The umbrella valves (424) are installed in the air passage (4211).

8. The diaphragm pump according to claim 7, characterized in that, The pump body (2) is provided with a working chamber (22), and the diaphragm (41) is located between the working chamber (22) and the first chamber (421).

9. The diaphragm pump according to claim 8, characterized in that, The first cavity (421) is provided with a driving cavity (4212), the driving cavity (4212) is located on the side of the diaphragm (41) away from the working cavity (22), and the driving cavity (4212) is connected to the second cavity (422) through the air passage (4211); The second cavity (422) is provided with an inhalation cavity (4221) and an exhaust cavity (4222). The inhalation cavity (4221) and the exhaust cavity (4222) both pass through the two ends of the second cavity (422), and the inhalation cavity (4221) and the exhaust cavity (4222) are both connected to the drive cavity (4212) through the air passage (4211).

10. The diaphragm pump according to claim 9, characterized in that, The umbrella valve (424) includes a fixing part (4241) and an opening and closing part (4242). The fixing part (4241) is fixedly connected to the air passage (4211). The opening and closing part (4242) of at least one umbrella valve (424) abuts against one end of the air passage (4211) near the drive chamber (4212). The opening and closing part (4242) of at least one umbrella valve (424) abuts against one end of the air passage (4211) near the discharge chamber (4222).

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