Diaphragm pump

Abstract

The utility model relates to a diaphragm pump and relates to the technical field of air pump devices, and the diaphragm pump is used for overcoming the defects that an existing diaphragm pump is large in size and complex in structure and comprises an air chamber box, a bottom plate, an air chamber cover and a driving assembly, the air chamber box is of a box body structure, arc-shaped grooves are formed in the two sides of a connecting rod on the air chamber box, and an air inlet cylinder and an air outlet cylinder are arranged on one side of the air chamber box at intervals; the second surface of the arc-shaped groove extends to form an annular wall and a partition wall, the partition wall divides the annular wall, the bottom plate is arranged on the portion, located on one side of the second surface of the arc-shaped groove, of the air chamber box, and the bottom plate, the annular wall and the partition wall define an air inlet cavity and an air outlet cavity, and the air chamber cover is arranged on the side, close to the first surface of the arc-shaped groove, of the air chamber box. A circular hole penetrating through the air chamber cover is formed in the air chamber cover and corresponds to the arc-shaped groove, a support plate is vertically arranged on the first surface of the air chamber cover, and the driving assembly is assembled on the support plate and used for driving the diaphragm pump to conduct air inlet and outlet work.

Description

Technical Field

[0001] This application relates to the technical field of air pump devices, and more particularly to a diaphragm pump. Background Technology

[0002] A diaphragm pump is a positive displacement pump that uses the reciprocating action of a rubber or Teflon diaphragm and a suitable check valve to pump liquids. Sometimes, this type of pump is also called a membrane pump. Currently, most membrane pumps on the market are electrostatically driven, thermally driven, or electromagnetically driven. Electromagnetically driven membrane pumps use electroplated copper wire wound around an iron alloy magnetic core as an electromagnetic actuator, and a magnetically conductive alloy plate as a diaphragm. When current is applied to the wound coil made of copper wire, the electromagnetic actuator generates an attraction force, causing the diaphragm to deform, increasing the volume of the pump chamber, opening the inlet valve, and allowing liquid to enter the chamber. When the current stops, the diaphragm returns to its original position by its own elasticity, pushing the fluid out of the chamber. Thermally driven membrane pumps achieve the driving purpose by heating the fluid or gas in the actuator chamber to expand and deform the diaphragm. Electrostatically driven pumps work by using the electrostatic attraction between two parallel plates. Typically, one of the parallel plates is fixed, while the other can move. All of the above membrane pumps have the disadvantages of large size, complex structure, and inconvenient maintenance.

[0003] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as complex structure and large size. Utility Model Content

[0004] This application provides a diaphragm pump to address the structural complexity of traditional diaphragm pumps.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a diaphragm pump, the diaphragm pump comprising:

[0006] The air chamber box is a box structure. An arc-shaped groove is provided on the air chamber box. An air inlet and an air outlet are spaced apart on one side of the air chamber box. An annular wall and a partition wall extend from the second surface of the arc-shaped groove. The partition wall separates the annular wall.

[0007] The base plate is disposed on the air chamber box and located on one side of the second surface of the arc-shaped groove, forming an air inlet chamber and an air outlet chamber together with the annular wall and the partition wall;

[0008] An air chamber cover is disposed on the air chamber box near the first surface of the arc-shaped groove. The air chamber cover has a circular hole that penetrates the air chamber cover. The circular hole corresponds to the arc-shaped groove. A support plate is vertically disposed on the first surface of the air chamber cover.

[0009] The drive assembly, mounted on the support plate, is used to drive the diaphragm pump to perform air intake and exhaust operations.

[0010] Preferably, the driving component includes:

[0011] A drive motor is disposed on the second surface of the support plate, the output end of the drive motor passes through the support plate, and a drive wheel is disposed on the output end of the drive motor;

[0012] An eccentric driven wheel is rotatably mounted on the first surface of the support plate. The eccentric driven wheel is meshed with the driving wheel, and an assembly rod is eccentrically provided on the eccentric driven wheel.

[0013] The rocker arm includes a driving end and a driven end, wherein the driving end is sleeved and mounted on the mounting rod.

[0014] Preferably, the drive assembly includes a guide connector, the guide connector comprising:

[0015] A guide frame is provided, in which the driven end of the rocker arm is inserted. A connecting post is provided, which passes through the guide frame and the rocker arm, for connecting the guide frame and the rocker arm.

[0016] A connecting plate is fixedly connected to the guide frame. A reinforcing plate is also provided on the side of the connecting plate connected to the guide frame. The reinforcing plate is connected to the connecting plate and the guide frame to enhance the structural strength of the guide connector.

[0017] The first fixing post is spaced apart on the side of the connecting plate away from the guide frame;

[0018] The second fixing post is spaced apart on the side of the connecting plate away from the guide frame, and the length of the second fixing post is less than that of the first fixing post.

[0019] Preferably, the diaphragm pump includes a diaphragm assembly, the diaphragm assembly comprising:

[0020] A thin film is attached to the guide connector on the side near the connecting disk, and the first fixing post and the second fixing post penetrate the thin film;

[0021] An arc-shaped fixing member is disposed on the second surface of the film, and the first fixing post passes through and fixes the arc-shaped fixing member.

[0022] Preferably, the film is made of EPDM material.

[0023] Preferably, the air chamber box includes:

[0024] An air intake groove is provided within the arc-shaped groove, and an air intake hole is further provided within the air intake groove, the air intake hole penetrating through the arc-shaped groove into the air intake chamber;

[0025] An air outlet groove is provided in the arc-shaped groove and is connected to the air inlet groove. An air outlet hole is further provided in the air outlet groove and extends through the arc-shaped groove into the air outlet chamber.

[0026] Preferably, the diaphragm pump includes:

[0027] An intake valve plate is disposed on the first surface of the intake groove, allowing gas to flow unidirectionally from the intake cylinder into the arc-shaped groove;

[0028] An exhaust valve is disposed on the second surface of the exhaust groove, allowing gas to flow unidirectionally from the arc-shaped groove to the outside of the exhaust cylinder.

[0029] Preferably, the air chamber cover includes:

[0030] Guide plates are spaced apart on the first surface of the support plate. Guide grooves are provided on opposite sides of the guide plates. The guide connector is slidably connected to the guide grooves through the guide frame. An oil groove is further provided in the guide grooves for injecting lubricating oil.

[0031] Preferably, the air chamber cover includes:

[0032] A support plate is spaced apart on the second surface of the bracket plate and is vertically positioned below the drive motor. The support plate is used to increase the structural strength of the air chamber cover and improve the assembly stability of the drive motor.

[0033] Preferably, the air chamber box includes:

[0034] A sealing ring is provided at the connection between the air chamber box and the membrane to increase the airtightness of the air chamber box.

[0035] The beneficial effects of this application are: the combination of air chamber box, air chamber cover and drive component results in a simple overall structure and convenient maintenance; and the setting of guide connector and guide groove makes the diaphragm pump move stably and not easy to deviate. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0037] Figure 1 This is a three-dimensional structural schematic diagram of the diaphragm pump provided in the embodiments of this application;

[0038] Figure 2 yes Figure 1 A three-dimensional structural diagram showing the orientation of the first surface of the gas chamber of the diaphragm pump.

[0039] Figure 3 yes Figure 1 A three-dimensional structural diagram showing the orientation of the second surface of the gas chamber of the diaphragm pump.

[0040] Figure 4 yes Figure 1 A three-dimensional structural diagram of the air chamber cover of the diaphragm pump in the image;

[0041] Figure 5 yes Figure 4 An enlarged 3D structural diagram of point A in the diagram;

[0042] Figure 6 yes Figure 1 A three-dimensional structural diagram of the assembly of the air chamber cover, drive motor, drive wheel, and eccentric driven wheel;

[0043] Figure 7 yes Figure 1 A three-dimensional structural diagram of the assembly of the rocker arm and guide connector;

[0044] Figure 8 yes Figure 1 An exploded three-dimensional structural diagram of the diaphragm, arc-shaped connector, and guide connector of the diaphragm pump.

[0045] Explanation of reference numerals in the attached drawings: 10. Air chamber box; 11. Arc-shaped groove; 12. Air inlet groove; 13. Air inlet hole; 14. Air outlet groove; 15. Air outlet hole; 16. Air inlet valve plate; 17. Air outlet valve plate; 18. Air inlet cylinder; 19. Air outlet cylinder; 20. Annular wall; 21. Partition wall; 22. Air inlet chamber; 23. Air outlet chamber; 24. Base plate; 25. Sealing ring; 30. Air chamber cover; 31. Round hole; 32. Support. 33. Frame plate; 34. Guide plate; 35. Guide groove; 36. Oil tank; 40. Support plate; 41. Drive motor; 42. Drive wheel; 43. Eccentric driven wheel; 44. Assembly rod; 50. Rocker arm; 51. Guide connector; 52. Guide frame; 53. Connecting plate; 54. Reinforcing plate; 55. First fixed post; 60. Membrane; 61. Fitting ring; 70. Arc-shaped fixing piece. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0048] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0049] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0050] This application provides a diaphragm pump, which includes an air chamber box 10, a base plate 24, an air chamber cover 30, a drive assembly, an inlet valve plate 16, and an outlet valve plate 17.

[0051] Please see Figure 1 , Figure 2 , Figure 3 As shown, the air chamber box 10 is a box structure. An arc-shaped groove 11 is provided on the air chamber box 10. An air inlet cylinder 18 and an air outlet cylinder 19 are spaced apart on one side of the air chamber box 10. An annular wall 20 and a partition wall 21 extend from the second surface of the arc-shaped groove 11. The partition wall 21 divides the annular wall 20. The partition wall 21 can divide the annular wall 20 evenly or unequally. A base plate 24 is disposed on the air chamber box 10, located on one side of the second surface of the arc-shaped groove 11, and is adjacent to the annular wall 20 and... The partition wall 21 encloses and forms an air inlet chamber 22 and an air outlet chamber 23. When the diaphragm pump is working, gas flows into the air inlet chamber 22 from the air inlet cylinder 18, then flows into the air outlet chamber 23 through the arc groove 11, and finally is discharged through the air outlet cylinder 19. The air chamber box 10 also includes a sealing ring 25, which is set at the connection between the air chamber box 10 and the diaphragm 60 to increase the sealing performance of the air chamber box 10. The air chamber box 10 is sealed by the diaphragm 60, and the cavity formed by the air chamber box 10 and the diaphragm 60 is hemispherical.

[0052] An air intake groove 12 is provided in an arc-shaped groove 11, and an air intake hole 13 is further provided in the air intake groove 12. The air intake hole 13 penetrates the arc-shaped groove 11 to the air intake chamber 22. An air intake valve plate 16 is provided on the first surface of the air intake groove 12, so that gas flows unidirectionally from the air intake cylinder 18 into the arc-shaped groove 11.

[0053] The air outlet groove 14 is disposed in the arc-shaped groove 11 and is connected to the air inlet groove 12. The air outlet groove 14 is further provided with an air outlet hole 15, which penetrates the arc-shaped groove 11 to the air outlet chamber 23. The air outlet valve plate 17 is disposed on the second surface of the air outlet groove 14, so that the gas flows out unidirectionally from the arc-shaped groove 11 to the outside of the air outlet cylinder 19.

[0054] When the diaphragm pump is inlet, the gas flows into the diaphragm pump. Since the inlet valve 16 is located on the first surface of the inlet groove 12 and the outlet valve 17 is located on the second surface of the outlet groove 14, when the gas flows into the diaphragm pump, the gas opens the inlet valve 16 and flows inward, while the outlet valve 17 is restricted and blocked by the outlet groove 14. This allows the gas to flow into the diaphragm pump only from the inlet cylinder 18 when it is inlet. When the diaphragm pump discharges gas outward, the inlet valve 16 is restricted and blocked by the first surface of the inlet groove 12, and the gas opens the outlet valve 17 in the outlet groove 14 and flows out from the outlet cylinder 19.

[0055] Please see Figure 4 As shown, the air chamber cover 30 is disposed on the air chamber box 10 near the first surface of the arc groove 11. The air chamber cover 30 is provided with a circular hole 31 that penetrates the air chamber cover 30. The circular hole 31 is provided corresponding to the arc groove 11. A support plate 32 is vertically disposed on the first surface of the air chamber cover 30. The air chamber cover 30 is fastened and fitted onto the air chamber box 10 to form the box body of the diaphragm pump.

[0056] The drive assembly is mounted on the bracket plate 32 and is used to drive the diaphragm pump to perform air intake and exhaust operations. The drive assembly includes a drive motor 40, an eccentric driven wheel 42, and a rocker arm 44.

[0057] Please see Figure 6 , Figure 7 As shown, the drive motor 40 is mounted on the second surface of the support plate 32, and the output end of the drive motor 40 passes through the support plate 32. A drive wheel 41 is mounted on the output end of the drive motor 40, and an eccentric driven wheel 42 is rotatably mounted on the first surface of the support plate 32. The eccentric driven wheel 42 is meshed with the drive wheel 41, and an mounting rod 43 is eccentrically mounted on the eccentric driven wheel 42. The rocker arm 44 includes a drive end and a driven end. The drive end is sleeved and mounted on the mounting rod 43. The drive motor 40 provides power to drive the drive wheel 41 to rotate. Since the drive wheel 41 is meshed with the eccentric driven wheel 42, when the drive wheel 41 rotates, it drives the eccentric driven wheel 42 to rotate. The rocker arm 44 is mounted on an eccentric part of the eccentric driven wheel 42 through the mounting rod 43, so that when the eccentric driven wheel 42 rotates, it drives the rocker arm to move up and down.

[0058] Please see Figure 7 , Figure 8 As shown, the drive assembly includes a guide connector 50, which includes a guide frame 51, a connecting plate 52, a first fixing post 54, and a second fixing post 55.

[0059] Please see Figure 7 As shown, the driven end of the rocker arm 44 is inserted into the guide frame 51 and is provided with a connecting post that passes through the guide frame 51 and the rocker arm 44 to connect the guide frame 51 and the rocker arm 44. The connecting plate 52 is fixedly connected to the guide frame 51. A reinforcing plate 53 is also provided on the side where the connecting plate 52 is connected to the guide frame 51. The reinforcing plate 53 is connected to the connecting plate 52 and the guide frame 51 to strengthen the structural strength of the guide connector 50. The first fixing post 54 is spaced apart on the side of the connecting plate 52 away from the guide frame 51, and the second fixing post 55 is spaced apart on the side of the connecting plate 52 away from the guide frame 51. The length of the second fixing post 55 is less than that of the first fixing post 54.

[0060] Please see Figure 5 As shown, the air chamber cover 30 also includes a guide plate 33, which is spaced apart on the first surface of the support plate 32. A guide groove 34 is provided on one side of the guide plate 33 at intervals. The guide connector 50 is slidably connected in the guide groove 34 through the guide frame 51. The guide groove 34 is used to guide, so that the rocker arm 44 drives the guide connector 50 to move stably in the guide groove 34. An oil groove 35 is further provided in the guide groove 34 for injecting lubricating oil.

[0061] When the drive motor 40 drives the drive wheel 41 to rotate, the drive wheel 41 drives the eccentric driven wheel 42 to rotate. The eccentric driven wheel drives the rocker arm 44 to move up and down. Since the rocker arm 44 is connected in the guide frame 51, when the rocker arm 44 moves up and down, it drives the guide connector 50 to move. The guide connector 50 is limited and matched in the guide groove 34 by the guide frame 51, so that the guide connector moves up and down stably in the guide groove 34 without deviation. The guide groove 34 is further provided with oil grooves 35 at intervals. The oil grooves 35 are used to inject lubricating oil to improve the smoothness of the movement of the guide connector 50 in the guide groove 34.

[0062] The drive assembly also includes a diaphragm 60 and an arc-shaped fastener 70.

[0063] Please see Figure 8As shown, the diaphragm 60 is connected to the guide connector 50 near the connecting plate 52. The first fixing post 54 and the second fixing post 55 pass through and connect the diaphragm 60. A fitting ring 61 is also provided on the first surface of the diaphragm 60. The fitting ring 61 fits into the second surface of the air chamber cover 30. The diaphragm 60 is sealed between the air chamber box 10 and the air chamber cover 30. An arc-shaped fixing member 70 is provided on the second surface of the diaphragm 60. The first fixing post 54 passes through and fixes the arc-shaped fixing member 70. The arc-shaped fixing member 70 presses the diaphragm 60 and the guide connector 50 tightly together. The outer end face formed by the movement trajectory of the diaphragm assembly is an outwardly convex pot-shaped structure, wherein the arc-shaped groove 11 is an inwardly concave pot-shaped structure. During the movement of the diaphragm assembly, the guide connector 50 drives the diaphragm 60 and the arc-shaped fixing member 70 to move, forming the movement trajectory of the diaphragm assembly. The outer end face of the movement trajectory of the diaphragm assembly is in contact with the surface of the arc-shaped groove 11, which improves the utilization rate of the compression space. The diaphragm 60 is made of EPDM material. When the rocker arm 44 moves, it drives the guide connector 50 up and down. The guide connector 50 causes the diaphragm 60 to deform upwards or downwards, promoting gas flow. When the drive motor 40 rotates, it drives the drive wheel 41 to rotate. The drive wheel 41 drives the eccentric driven wheel 42 to rotate, which in turn drives the rocker arm 44 to move up and down. The rocker arm 44 causes the guide connector 50 to move stably along the direction of the guide groove 34 within the guide groove 34. Since the guide connector 50 is connected to the diaphragm 60, when the guide connector 50 moves, it causes the diaphragm 60 to deform. When the rocker arm 44 drives the guide... When the connector 50 moves upward, the guide connector 50 pulls the diaphragm 60 to deform towards the air chamber cover 30, increasing the space inside the air chamber box 10 and drawing gas from the air inlet cylinder 18 into the air inlet groove 12 and the arc groove 11. When the rocker arm 44 drives the guide connector 50 to move downward, the diaphragm 60 deforms into the air chamber box 10, compressing the space inside the air chamber box 10 and expelling the gas from the air outlet cylinder 19. The diaphragm pump, driven by the drive motor 40, repeats the above working process, continuously performing air intake and exhaust.

[0064] Please see Figure 4 As shown, the air chamber cover 30 also includes a support plate 36, which is spaced apart on the second surface of the bracket plate 32 and vertically positioned below the drive motor 40. This is used to increase the structural strength of the air chamber cover 30 and improve the assembly stability of the drive motor 40.

[0065] In summary, the diaphragm pump drives the drive wheel 41 to rotate via the drive motor 40. The drive wheel 41 drives the eccentric driven wheel 42 to rotate, and the eccentric driven wheel 42 drives the rocker arm 44 to move up and down. The rocker arm 44 pushes and pulls the diaphragm 60 through the guide connector 50, causing the diaphragm 60 to deform, thereby continuously performing the actions of air intake and exhaust. The intake valve 16 and the exhaust valve 17 ensure that only gas can enter the intake cylinder 18 and only gas can flow out of the exhaust cylinder 19. The diaphragm pump has a simple overall structure, is easy to maintain, and operates stably.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A diaphragm pump, characterized in that, The diaphragm pump includes: The air chamber box (10) is a box structure. An arc groove (11) is provided on the air chamber box (10). An air inlet cylinder (18) and an air outlet cylinder (19) are provided on one side of the air chamber box (10). An annular wall (20) and a partition wall (21) extend from the second surface of the arc groove (11). The partition wall (21) separates the annular wall (20). The bottom plate (24) is located on the second surface of the arc groove (11) on the air chamber box (10), and together with the annular wall (20) and the partition wall (21), it forms an air inlet chamber (22) and an air outlet chamber (23). An air chamber cover (30) is provided on the air chamber box (10) near the first surface of the arc groove (11). A circular hole (31) is provided on the air chamber cover (30) through the air chamber cover (30). The circular hole (31) is provided corresponding to the arc groove (11). A support plate (32) is vertically provided on the first surface of the air chamber cover (30). The drive assembly, mounted on the bracket plate (32), is used to drive the diaphragm pump to perform air intake and exhaust operations.

2. The diaphragm pump according to claim 1, characterized in that, The driving component includes: A drive motor (40) is disposed on the second surface of the support plate (32), the output end of the drive motor (40) passes through the support plate (32), and a drive wheel (41) is disposed on the output end of the drive motor (40). An eccentric driven wheel (42) is rotatably mounted on the first surface of the support plate (32). The eccentric driven wheel (42) is meshed with the driving wheel (41). An assembly rod (43) is eccentrically mounted on the eccentric driven wheel (42). The rocker arm (44) includes an active end and a driven end, the active end being sleeved and mounted on the assembly rod (43).

3. The diaphragm pump according to claim 2, characterized in that, The drive assembly includes a guide connector (50), the guide connector (50) comprising: The guide frame (51) has the driven end of the rocker arm (44) inserted into the guide frame (51) and is provided with a connecting post that passes through the guide frame (51) and the rocker arm (44) to connect the guide frame (51) and the rocker arm (44). A connecting plate (52) is fixedly connected to the guide frame (51). A reinforcing plate (53) is also provided on the side where the connecting plate (52) is connected to the guide frame (51). The reinforcing plate (53) is connected to the connecting plate (52) and the guide frame (51) to strengthen the structural strength of the guide connector (50). The first fixing post (54) is spaced apart on the side of the connecting plate (52) away from the guide frame (51); The second fixing post (55) is spaced apart on the side of the connecting plate (52) away from the guide frame (51), and the length of the second fixing post (55) is less than that of the first fixing post (54).

4. The diaphragm pump according to claim 3, characterized in that, The diaphragm pump includes a diaphragm assembly, the diaphragm assembly comprising: A thin film (60) is attached to the guide connector (50) on the side near the connecting disk (52), and the first fixing post (54) and the second fixing post (55) pass through and connect the thin film (60). An arc-shaped fixing member (70) is disposed on the second surface of the film (60), and the first fixing post (54) passes through and fixes the arc-shaped fixing member (70).

5. The diaphragm pump according to claim 4, characterized in that, The film (60) is made of EPDM material.

6. The diaphragm pump according to claim 5, characterized in that, The air chamber box (10) includes: An air intake groove (12) is provided in the arc-shaped groove (11), and an air intake hole (13) is further provided in the air intake groove (12). The air intake hole (13) penetrates the arc-shaped groove (11) and extends into the air intake chamber (22). An air outlet groove (14) is provided in the arc-shaped groove (11). The air outlet groove (14) is connected to the air inlet groove (12). An air outlet hole (15) is further provided in the air outlet groove (14). The air outlet hole (15) passes through the arc-shaped groove (11) to the air outlet chamber (23).

7. The diaphragm pump according to claim 6, characterized in that, The diaphragm pump includes: An intake valve plate (16) is disposed on the first surface of the intake groove (12) so that gas flows unidirectionally from the intake cylinder (18) into the arc-shaped groove (11); An exhaust valve plate (17) is disposed on the second surface of the exhaust groove (14) to allow gas to flow out unidirectionally from the arc groove (11) to the outside of the exhaust cylinder (19).

8. The diaphragm pump according to claim 3, characterized in that, The air chamber cover (30) includes: A guide plate (33) is spaced apart on the first surface of the support plate (32). A guide groove (34) is provided on one side of the guide plate (33) at intervals. The guide connector (50) is slidably connected to the guide groove (34) through the guide frame (51). An oil groove (35) is further provided in the guide groove (34) for injecting lubricating oil.

9. The diaphragm pump according to claim 2, characterized in that, The air chamber cover (30) includes: A support plate (36) is spaced apart on the second surface of the bracket plate (32). The support plate (36) is vertically positioned below the drive motor (40) to increase the structural strength of the air chamber cover (30) and improve the assembly stability of the drive motor (40).

10. The diaphragm pump according to claim 5, characterized in that, The air chamber box (10) includes: A sealing ring (25) is provided on the air chamber box (10) at the connection with the film (60) to increase the sealing performance of the air chamber box (10).

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