Driving assembly and diaphragm pump

Abstract

The utility model discloses a drive assembly and diaphragm pump, drive assembly includes drive shaft and transmission mechanism, the transmission mechanism is composed of a plurality of transmission link sets that are arranged along the axial direction in order, the drive end of each transmission link set is respectively in transmission connection with drive shaft, the actuating end of each transmission link set is respectively in transmission connection with diaphragm piece, and the diaphragm piece is in transmission connection with the drive shaft. And the diaphragm pieces are deformed in a reciprocating manner along the radial direction along with rotation of the driving shaft. In a projection view in the axial direction, the included angle between every two adjacent transmission connecting rod sets in the transmission mechanism in the circumferential direction is 60 degrees. Through the arrangement, the distribution of the driving assembly and the pump head is more reasonable, the number of the pump cavities is increased in a limited volume space, the vacuum rate of the diaphragm pump can be improved, the structure of the driving assembly in the limited space is optimized through the design, the number of the pump cavities is increased while the efficient transmission performance of the driving assembly is ensured, and the service life of the diaphragm pump is prolonged. And the application of the diaphragm pump is wider.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, specifically to a drive component and a diaphragm pump. Background Technology

[0002] A diaphragm pump is a pumping device that generates a vacuum and transports fluid through the reciprocating motion of a diaphragm. Due to structural limitations of the drive components, common diaphragm pumps are difficult to increase the number of pump chambers or improve the vacuum rate within a limited space, thus limiting their application scenarios. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the main purpose of this utility model is to provide a drive component and diaphragm pump with a compact structure, which can provide more pump chambers in a limited space and has a wider range of applications.

[0004] To achieve the above objectives, the present invention provides a driving component comprising:

[0005] Drive shaft, extending axially; and,

[0006] The transmission mechanism includes multiple sets of transmission linkages arranged sequentially along the axial direction. The driving end of each set of transmission linkages is connected to the drive shaft, and the actuating end of each set of transmission linkages is connected to the diaphragm, so that the diaphragm can deform radially and reciprocate with the rotation of the drive shaft.

[0007] In the axial projection view, the included angle between any two adjacent sets of the transmission linkages in the circumferential direction is 60 degrees.

[0008] Optionally, in a projection view along the axial direction, the outer contour of the line connecting the plurality of actuating ends of the transmission mechanism is a regular hexagon.

[0009] Optionally, the number of the transmission linkage groups is greater than or equal to 5; and / or,

[0010] The number of actuating terminals is even and greater than or equal to 10.

[0011] Optionally, each of the transmission linkage groups has a drive end relatively close to the drive shaft and two actuation ends distributed on both sides of the drive shaft, with the line connecting the two actuation ends extending radially.

[0012] Optionally, in the axial projection view, the included angle between every two adjacent sets of the transmission linkages is 60 degrees in the axial direction.

[0013] Optionally, each group of transmission linkages includes:

[0014] An eccentric shaft includes a first eccentric wheel and a second eccentric wheel, and has through holes that pass through the first eccentric wheel and the second eccentric wheel in sequence. The eccentric shaft is sleeved on the outer periphery of the drive shaft through the through holes. The eccentric directions of the first eccentric wheel and the second eccentric wheel are opposite.

[0015] The first bearing is sleeved on the outer circumference of the first eccentric wheel;

[0016] The second bearing is sleeved on the outer circumference of the second eccentric wheel;

[0017] The first connecting rod includes a first transmission ring, a first transmission rod, and a first connecting portion sequentially arranged from the driving end to the actuating end. The first transmission ring is sleeved on the outer periphery of the first bearing, and the first connecting portion is used to connect and fix to one of the diaphragm sheets; and...

[0018] The second connecting rod includes a second transmission ring, a second transmission rod, and a second connecting part arranged sequentially from the driving end to the actuating end. The second transmission ring is sleeved on the outer periphery of the second bearing, and the second connecting part is used to connect and fix to another diaphragm.

[0019] The first transmission rod and the second transmission rod extend obliquely in opposite directions in the axial direction, so that the first connecting part and the second connecting part are aligned in the radial direction.

[0020] Optionally, each group of transmission linkages includes:

[0021] An eccentric wheel is eccentrically fitted onto the outer periphery of the drive shaft;

[0022] A bearing, sleeved on the outer circumference of the eccentric wheel; and,

[0023] The connecting rod includes a transmission ring, a transmission rod, and a connecting part arranged sequentially from the driving end to the actuating end. The transmission ring is sleeved on the outer periphery of the bearing, and the connecting part is used to connect and fix to the diaphragm.

[0024] This utility model also provides a diaphragm pump, comprising:

[0025] Pump casing;

[0026] Multiple pump heads are mounted on the pump housing, each pump head including a diaphragm; and,

[0027] The drive assembly described above is installed in the pump housing, wherein the plurality of actuating ends are connected to the plurality of diaphragms in a one-to-one correspondence.

[0028] Optionally, the pump housing is configured in the shape of a regular hexagonal prism, the drive shaft extends along the axial direction of the pump housing, the pump housing has six peripheral side surfaces, and a plurality of pump heads are distributed and mounted on the six peripheral side surfaces.

[0029] Optionally, each of the peripheral side surfaces is provided with a mounting groove, each pump head includes a pump cover, each pump cover is correspondingly installed in each of the mounting grooves, and each diaphragm is installed on the corresponding pump cover. The mounting grooves on two adjacent peripheral side surfaces in the circumferential direction are not completely offset from each other in the axial direction, and the two mounting grooves opposite each other in the radial direction are aligned with each other in the axial direction.

[0030] The technical solution provided by this utility model has the following beneficial effects:

[0031] This invention relates to a drive assembly for a diaphragm pump, and the diaphragm pump itself. The drive assembly includes a drive shaft and a transmission mechanism. The transmission mechanism consists of multiple sets of transmission linkages arranged sequentially along the axial direction. The driving end of each set of transmission linkages is connected to the drive shaft, and the actuating end of each set is connected to the diaphragm, causing the diaphragm to deform radially as the drive shaft rotates. In the axial projection view, the included angle between two adjacent sets of transmission linkages in the circumferential direction is 60 degrees. This structure makes the distribution of the drive assembly and pump head more rational, increasing the number of pump chambers within a limited volume space, thus improving the vacuum rate of the diaphragm pump. This design optimizes the structure of the drive assembly within a limited space, increasing the number of pump chambers while ensuring efficient transmission performance, making the application of the diaphragm pump more widespread. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0033] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the diaphragm pump provided by this utility model;

[0034] Figure 2 for Figure 1 Axial cross-sectional view of a diaphragm pump;

[0035] Figure 3 for Figure 1 A radial cross-sectional view of a diaphragm pump;

[0036] Figure 4 for Figure 1A partial three-dimensional structural diagram of a diaphragm pump, where the pump casing is not shown;

[0037] Figure 5 for Figure 4 A schematic diagram of the three-dimensional assembly of the connecting rod assembly and the pump head;

[0038] Figure 6 for Figure 4 An exploded three-dimensional structural diagram of the central drive shaft and one of the connecting rod groups;

[0039] Figure 7 for Figure 1 A three-dimensional structural diagram of the pump casing.

[0040] Explanation of icon numbers:

[0041] 1000-Diaphragm pump; 100-Drive assembly; 1-Drive shaft; 2-Transmission mechanism; 20-Connecting rod assembly; 21-Drive end; 22-Actuation end; 23-Eccentric shaft; 230-Through hole; 231-First eccentric wheel; 232-Second eccentric wheel; 24-First bearing; 25-Second bearing; 26-First connecting rod; 261-First transmission ring; 262-First transmission rod; 263-First connecting part; 27-Second connecting rod; 271-Second transmission ring; 272-Second transmission rod; 273-Second connecting part; 30-Pump head; 31-Diaphragm; 32-Pump cover; 40-Pump housing; 41-Peripheral side; 410-Mounting groove.

[0042] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model 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, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the 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. When 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 by this utility model.

[0046] Please see Figures 1 to 7 This utility model discloses a drive assembly 100 and a diaphragm pump 1000.

[0047] Please see Figures 1 to 3 The diaphragm pump 1000 includes a pump housing 40, multiple pump heads 30, and a drive assembly 100. The structure of the pump housing 40 protects the internal components of the diaphragm pump 1000, reduces the adverse effects of the external environment on the diaphragm pump 1000, and improves the durability of the equipment. Multiple pump heads 30 are mounted on the pump housing 40 to provide multiple pump chambers, enabling the diaphragm pump 1000 to complete more fluid transport in the same working cycle, improving working efficiency and vacuum level. Each pump head 30 includes a diaphragm 31 that can be driven to elastically deform, thereby changing the volume of the pump chamber. The drive assembly 100 is mounted in the pump housing 40 and is drivenly connected to the multiple diaphragm 31 to drive the diaphragm 31 to synchronously reciprocate, achieving efficient transmission.

[0048] Specifically, please refer to the following: Figures 2 to 4 The drive assembly 100 includes a drive shaft 1 and a transmission mechanism 2. The drive shaft 1 extends axially, and the transmission mechanism 2 includes multiple sets of transmission linkages 20 arranged sequentially along the axial direction. The drive end 21 of each set of transmission linkages 20 is connected to the drive shaft 1, and the actuating end 22 of each set of transmission linkages 20 is connected to the diaphragm 31, so that the diaphragm can deform radially and reciprocate with the rotation of the drive shaft 1. That is, each actuating end 22 is connected to multiple diaphragms 31 in a one-to-one correspondence.

[0049] In the axial projection view, the included angle between any two adjacent sets of transmission link groups 20 in the circumferential direction is 60 degrees. It should be noted that the included angle between two sets of transmission link groups 20 is the angle between the projections of the extension directions of the two sets of transmission link groups 20 onto the axial direction. Specifically, the extension direction of each set of transmission link groups 20 is the direction of the line connecting its geometric center at the connection point with the diaphragm and the central axis at its connection point with the drive shaft 1, that is, the direction of the line connecting the centers of the drive end 21 and the actuation end 22 of the transmission link group 20.

[0050] In this embodiment, the design of the transmission mechanism 2 makes the distribution of the drive assembly 100 and the pump head 30 more reasonable, and increases the number of pump chambers within a limited volume space, enabling the diaphragm pump 1000 to improve the vacuum rate. This design optimizes the structure of the drive assembly 100 within a limited space, so that the external size of the diaphragm pump 1000 is limited within a reasonable range. While ensuring the efficient transmission performance of the drive assembly 100, the number of pump chambers is increased, making the application of the diaphragm pump more widespread.

[0051] Please continue reading. Figure 2 In the axial projection view, the outer contour of the line connecting the multiple actuating ends 22 of the transmission mechanism 2 is a regular hexagon. That is, the figure formed by connecting the multiple actuating ends 22 at a point away from the driving end 21 is a regular hexagon in the axial projection view.

[0052] This hexagonal layout not only allows for the efficient installation of more pump chambers within a limited space, but also maintains the stability and balance of each actuating end 22 during transmission, reducing radial vibration and wear on the drive shaft 1 and extending the service life of the drive assembly 100. This arrangement allows the drive assembly 100 to be more compactly installed inside the diaphragm pump 1000, while ensuring uniform transmission of each actuating end 22, thus improving the overall performance of the diaphragm pump 1000. Furthermore, the regular hexagonal layout helps reduce the complexity and cost of manufacturing the diaphragm pump 1000, because the relative positions of the actuating ends 22 are more easily distributed symmetrically and evenly, and the dimensions of each transmission linkage assemblies 20 can be designed to be consistent.

[0053] Preferably, the number of transmission linkage groups 20 is greater than or equal to 5; and / or, the number of actuating ends 22 is an even number, greater than or equal to 10. In this embodiment, by increasing the number of transmission linkage groups 20 or the number of actuating ends 22, the vacuum rate and working efficiency of the diaphragm pump 1000 can be further improved. In addition, by increasing the number of actuating ends 22, the load can be distributed during transmission, reducing the working pressure of a single actuating end 22 and extending the service life of the equipment.

[0054] In optional embodiments, please continue to refer to [the relevant documentation]. Figures 2 to 5Each transmission linkage group 20 has a driving end 21 near the drive shaft 1 and two actuating ends 22 distributed on both sides of the drive shaft 1, with the line connecting the two actuating ends 22 extending radially. In this embodiment, the two actuating ends 22 are respectively connected to diaphragm plates 31, enabling the two diaphragm plates 31 to reciprocate synchronously, increasing the number of pump chambers and the vacuum level. Simultaneously, this design also maintains the balance of each actuating end 22 during transmission, reducing vibration and wear on the drive shaft 1 due to uneven transmission. Furthermore, the radially extending connection design makes the transmission linkage group 20 operate more smoothly during transmission, reducing frictional loss and improving transmission efficiency.

[0055] Preferably, in the axial projection view, the included angle between any two adjacent sets of transmission linkages 20 in the axial direction is 60 degrees. This further optimizes the spatial layout and transmission efficiency of the transmission mechanism 2. The 60-degree angle design results in a hexagonal arrangement of the outer contour of the transmission mechanism 2. This arrangement not only provides more transmission points within a limited space, increasing the number of pump chambers and improving the vacuum rate, but also maintains the stability and balance of each transmission linkage set 20 during transmission, reducing vibration and wear. The hexagonal arrangement also makes the transmission mechanism 2 more compact during installation, reducing space occupation and improving the overall performance of the diaphragm pump 1000.

[0056] Based on the above embodiments, please refer to Figure 5 and Figure 6 Each transmission linkage group 20 includes an eccentric shaft 23, a first bearing 24 and a second bearing 25, a first connecting rod 26, and a second connecting rod 27. The eccentric shaft 23 includes a first eccentric wheel 231 and a second eccentric wheel 232, and has through holes 230 sequentially passing through the first eccentric wheel 231 and the second eccentric wheel 232. The eccentric shaft 23 is sleeved on the outer periphery of the drive shaft 1 through the through holes 230. The eccentric directions of the first eccentric wheel 231 and the second eccentric wheel 232 are opposite. The first bearing 24 is sleeved on the outer periphery of the first eccentric wheel 231, and the second bearing 25 is sleeved on the outer periphery of the second eccentric wheel 232. The first connecting rod 26 includes a first transmission ring 261, a first transmission rod 262, and a first connecting portion 263 sequentially arranged from the drive end 21 to the actuation end 22. The first transmission ring 261 is sleeved on the outer periphery of the first bearing 24, and the first connecting portion 263 is used to connect and fix to a diaphragm sheet 31. The second connecting rod 27 includes a second transmission ring 271, a second transmission rod 272, and a second connecting portion 273 arranged sequentially from the driving end 21 to the actuating end 22. The second transmission ring 271 is sleeved on the outer periphery of the second bearing 25, and the second connecting portion 273 is used to connect and fix it to another diaphragm 31. The first transmission rod 262 and the second transmission rod 272 extend obliquely in opposite directions in the axial direction, so that the first connecting portion 263 and the second connecting portion 273 are aligned in the radial direction.

[0057] In this embodiment, the design of the first transmission rod 262 and the second transmission rod 272 extending obliquely in opposite directions in the axial direction aligns the first connecting portion 263 and the second connecting portion 273 radially. This design enables complex transmission paths within a limited space, improving transmission efficiency. The cooperation between each eccentric wheel and the bearing makes the transmission smoother, reduces friction and wear, and improves transmission accuracy. The combination of the first connecting rod 26 and the second connecting rod 27 enables the drive assembly 100 to achieve multi-point transmission, increasing the number of pump chambers and the vacuum level. Furthermore, the design of the first eccentric wheel 231 and the second eccentric wheel 232 with opposite eccentric directions balances the torque generated during transmission, reduces vibration and noise, counteracts the adverse effects of eccentric transmission on the drive shaft 1, and improves the stability and service life of the transmission assembly.

[0058] In other optional embodiments, each group of transmission linkages 20 may also be provided with one or more actuating ends 22. Specifically, each group of transmission linkages 20 includes an eccentric wheel, a bearing, and a connecting rod. The eccentric wheel is eccentrically sleeved on the outer periphery of the drive shaft 1, the bearing is sleeved on the outer periphery of the eccentric wheel, and the connecting rod includes a transmission ring, a transmission rod, and a connecting part. The transmission ring is sleeved on the outer periphery of the bearing, and the connecting part is used to connect and fix with the diaphragm 31. This design can achieve an efficient transmission path in a limited space, improving the working efficiency of the diaphragm pump 1000. The combination of the eccentric wheel and the bearing makes the transmission smoother, reduces friction and wear, and improves transmission accuracy. The design of the transmission ring and the transmission rod enables the drive assembly 100 to achieve multi-point transmission, increasing the number of pump chambers and the vacuum level. The connection between the connecting part and the diaphragm 31 enables the diaphragm 31 to reciprocate synchronously, improving the pump's transmission efficiency and vacuum effect.

[0059] In optional embodiments, please continue to refer to Figure 1 and Figure 7 The pump housing 40 is arranged in a regular hexagonal prism shape, and the drive shaft 1 extends axially along the pump housing 40. The pump housing 40 has six peripheral side surfaces 41, and multiple pump heads 30 are distributed and mounted on the six peripheral side surfaces 41. This design enables a greater number of pump chambers within a limited space, improving the vacuum rate and operating efficiency of the diaphragm pump 1000. The regular hexagonal prism layout of the pump housing 40 not only optimizes space utilization but also maintains the stability and balance of each pump head 30 during installation, reducing vibration and wear. The axial extension of the drive shaft 1 allows the drive assembly 100 to be more compactly installed inside the pump housing 40, improving transmission efficiency. In addition, the arrangement of the six peripheral side surfaces 41 makes the layout of the pump heads 30 more symmetrical and uniform, reducing manufacturing complexity and cost.

[0060] For further information, please refer to [link / reference]. Figure 7Each circumferential side 41 has a mounting groove 410. The pump head 30 includes a pump cover 32, and each pump cover 32 is correspondingly installed in its respective mounting groove 410. The diaphragm 31 is movably installed on the pump cover 32. The mounting grooves 410 on two adjacent circumferential side surfaces 41 are not completely offset from each other in the axial direction, while two radially opposite mounting grooves 410 are aligned with each other in the axial direction. This design enables efficient liquid delivery within a limited space, increasing the number of pump chambers and the vacuum level. The combined design of the mounting grooves 410 and the pump cover 32 makes the installation of the pump head 30 more convenient and compact, reduces liquid leakage, and ensures the efficient operation of the diaphragm pump 1000. In addition, the mounting grooves 410 on two adjacent circumferential side surfaces 41 are not completely offset from each other in the axial direction, making the distribution of the pump chambers more compact and allowing them to correspond with the internal drive assembly 100. Each transmission linkage assembly 20 can be designed with consistent dimensions and only needs to be installed according to the design, effectively reducing production costs and assembly difficulty.

[0061] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A drive assembly for a diaphragm pump, characterized by, The drive assembly comprises: a drive shaft extending in an axial direction; and a transmission mechanism comprising a plurality of groups of transmission linkages arranged in sequence in the axial direction, drive ends of each group of transmission linkages being respectively in transmission connection with the drive shaft, and actuating ends of each group of transmission linkages being respectively in transmission connection with a diaphragm, so that the diaphragm is deformed in a radial direction in reciprocation with rotation of the drive shaft. In a projection view in the axial direction, an included angle between every two adjacent groups of transmission linkages in the circumferential direction is 60 degrees. In the projection view in the axial direction, an outline of a line connecting the actuating ends of the transmission mechanism is a regular hexagon.

2. The drive assembly of claim 1, wherein, The number of groups of transmission linkages is greater than or equal to 5; and / or 3. The drive assembly of claim 1, wherein, The number of actuating ends is an even number and is greater than or equal to 10. Each group of transmission linkages has a drive end close to the drive shaft and two actuating ends distributed on both sides of the drive shaft, and a line connecting the two actuating ends extends in the radial direction.

4. The drive assembly of claim 1, wherein, In the projection view in the axial direction, an included angle between every two adjacent groups of transmission linkages in the axial direction is 60 degrees.

5. The drive assembly of claim 4, wherein, Each group of transmission linkages comprises:

6. The drive assembly of any one of claims 1 to 5, wherein, an eccentric shaft comprising a first eccentric wheel and a second eccentric wheel, and having a through hole sequentially penetrating the first eccentric wheel and the second eccentric wheel, the eccentric shaft being sleeved on an outer periphery of the drive shaft through the through hole, and the first eccentric wheel and the second eccentric wheel having opposite eccentric directions; a first bearing sleeved on an outer periphery of the first eccentric wheel; a second bearing sleeved on an outer periphery of the second eccentric wheel; a first linkage member comprising a first transmission ring, a first transmission rod and a first connecting portion sequentially arranged from the drive end to the actuating end, the first transmission ring being sleeved on an outer periphery of the first bearing, and the first connecting portion being used to be connected and fixed with one diaphragm; and a second linkage member comprising a second transmission ring, a second transmission rod and a second connecting portion sequentially arranged from the drive end to the actuating end, the second transmission ring being sleeved on an outer periphery of the second bearing, and the second connecting portion being used to be connected and fixed with another diaphragm; wherein the first transmission rod and the second transmission rod extend in opposite directions in the axial direction, so that the first connecting portion and the second connecting portion are aligned in the radial direction. Each group of transmission linkages comprises:

7. The drive assembly of any one of claims 1 to 3, wherein, an eccentric wheel eccentrically sleeved on an outer periphery of the drive shaft; a bearing sleeved on an outer periphery of the eccentric wheel; and a linkage member comprising a transmission ring, a transmission rod and a connecting portion sequentially arranged from the drive end to the actuating end, the transmission ring being sleeved on an outer periphery of the bearing, and the connecting portion being used to be connected and fixed with the diaphragm. The drive assembly comprises:

8. A diaphragm pump characterized by, a pump housing; a plurality of pump heads mounted in the pump housing, each pump head comprising a diaphragm; and the drive assembly according to any one of claims 1 to 7 is mounted in the pump housing, wherein a plurality of actuating ends are connected with a plurality of diaphragms one by one. The pump housing is in the shape of a regular hexagonal prism, the drive shaft extends in the axial direction of the pump housing, and the pump housing has six peripheral sides, and a plurality of pump heads are distributed and mounted on the six peripheral sides.

9. The membrane pump of claim 8, wherein, ​ 10. The membrane pump of claim 9, wherein, Each of the circumferential side surfaces is provided with a mounting groove, each of the pump heads further comprises a pump cover, each of the pump covers is correspondingly mounted in the mounting groove, and each of the diaphragms is mounted on the corresponding pump cover. The mounting grooves on circumferentially adjacent two of the circumferential side surfaces are arranged to be not completely staggered in the axial direction, and the mounting grooves on radially opposite two of the circumferential side surfaces are arranged to be aligned in the axial direction.

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