A separable diaphragm pump

Abstract

The utility model discloses a separable diaphragm pump relates to diaphragm pump technical field, wherein, separable diaphragm pump includes pump body, drive component and connecting piece, and pump body includes bottom shell, bearing and pivot, and bottom shell is equipped with inner chamber and with inner chamber intercommunication's via hole, and bearing is installed at via hole place, and one end of pivot is used for with located transmission member transmission connection in inner chamber, and the other end passes through bearing, drive component includes motor, shaft coupling and motor fixed part, and shaft coupling is installed in motor fixed part, and the one end of pivot passes through bearing and stretches into motor fixed part, and is connected with shaft coupling coaxially, and the output shaft of motor stretches into motor fixed part, and is connected with shaft coupling, and connecting piece is set up in bottom shell outside, and is detachably connected with motor fixed part, the utility model provides technical scheme will pump body and drive part detachably connected, and let as disposable consumable's pump body can be detached from drive part after using, make drive part reuse, thereby reduce disposable use cost.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a separable diaphragm pump. Background Technology

[0002] In medical procedures, surgical irrigators and other instruments often employ pump structures to deliver fluids. Because these pumps come into direct contact with the patient's bodily fluids or irrigation solutions during use, posing a risk of contamination, they are typically designed as single-use consumables to avoid cross-infection and other problems caused by reuse.

[0003] Currently, most common diaphragm pumps adopt an integrated structure of pump body and drive motor, meaning the pump body cannot be disassembled and replaced independently of the motor. In this type of structure, even if only the pump body is contaminated, the entire pump body-motor assembly must be discarded during replacement, significantly increasing the cost of single use and resulting in a large waste of motor and transmission components, thus limiting its applicability in scenarios requiring frequent replacement. Utility Model Content

[0004] The main purpose of this invention is to propose a separable diaphragm pump, which aims to detachably connect the pump body and the drive part, so that the pump body, which is a disposable consumable, can be disassembled from the drive part after use, allowing the drive part to be reused, thereby reducing the cost of single use.

[0005] To achieve the above objectives, this utility model proposes a separable diaphragm pump, the separable diaphragm pump comprising: The pump body includes a bottom shell, a bearing, and a rotating shaft. The bottom shell has an inner cavity and a through hole communicating with the inner cavity. The bearing is installed at the through hole. One end of the rotating shaft is used for transmission connection with a transmission component located in the inner cavity, and the other end passes through the bearing. A drive assembly, comprising a motor, a coupling, and a motor mounting bracket, wherein the coupling is mounted within the motor mounting bracket, and one end of the rotating shaft passing through the bearing extends into the motor mounting bracket and is coaxially connected to the coupling; the output shaft of the motor extends into the motor mounting bracket and is connected to the coupling; and A connector is fitted onto the outside of the bottom shell and is detachably connected to the motor fixing component.

[0006] In one embodiment, the outer wall of the motor fixing member is provided with a rotating groove, and the side of the connector facing the motor fixing member is provided with a rotating buckle. By rotating relative to each other, the rotating buckle is locked or released from the rotating groove, so that the motor fixing member and the connector are detachably connected.

[0007] In one embodiment, the connector is a connecting housing with an opening on one side, and the end of the connecting housing away from the opening is provided with a sleeve. The outer peripheral wall of the bottom shell is provided with a flange, which extends into the connecting shell and connects with the edge of the sleeve; the inner wall of the connecting shell near the opening is provided with a rotating buckle, which is spaced apart from the opening of the sleeve.

[0008] In one embodiment, the inner wall of the connecting housing is provided with a plurality of the rotating buckles, and the plurality of rotating buckles are arranged at intervals around the inner wall of the connecting housing; The outer wall of the motor fixing component is provided with a plurality of rotating slots, which are arranged at intervals around the outer wall of the motor fixing component; each rotating buckle engages with one of the rotating slots.

[0009] In one embodiment, the rotating slot includes a snap-fit ​​hole and an inlet hole communicating with the snap-fit ​​hole, and the inlet hole extends to the edge of the motor fixing member; the shape of the snap-fit ​​hole and the shape of the buckle are both straight.

[0010] In one embodiment, the motor and the motor mounting component are fixed together by a threaded connection.

[0011] In one embodiment, the rotating shaft and the bearing are fixed together by a tight fit.

[0012] In one embodiment, the bearing is fixed to the pump body base by a tight fit.

[0013] In one embodiment, the coupling and the rotating shaft are connected by a straight-line limiting structure.

[0014] In one embodiment, the straight-line limiting structure includes a straight-line groove disposed at the end of the coupling, and a straight-line convex key disposed at the end of the rotating shaft and adapted to the straight-line groove.

[0015] The detachable diaphragm pump of this utility model includes a pump body, a drive assembly, and a connector. The pump body includes a bottom shell, a bearing, and a rotating shaft. The bottom shell has an inner cavity and a through hole communicating with the inner cavity. The bearing is installed at the through hole. One end of the rotating shaft is used for transmission connection with a transmission component located in the inner cavity, and the other end passes through the bearing. The drive assembly includes a motor, a coupling, and a motor fixing component. The coupling is installed inside the motor fixing component, and the end of the rotating shaft passing through the bearing extends into the motor fixing component and is coaxially connected with the coupling. The output shaft of the motor extends into the motor fixing component and is connected to the coupling. The connector is sleeved on the outside of the bottom shell and is detachably connected to the motor fixing component. By detachably connecting the pump body and the drive assembly through the connector, the pump body, which is a disposable consumable, can be easily separated from the drive part after use, thereby realizing the reuse of the drive assembly and significantly reducing the one-time use cost caused by replacing the whole unit, while taking into account both economy and convenience of use. Attached Figure Description

[0016] 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.

[0017] Figure 1 A perspective view of the separable diaphragm pump provided by this utility model; Figure 2 This is a front view of the separable diaphragm pump provided by this utility model; Figure 3 for Figure 2 Schematic diagram of section AA in the diagram; Figure 4 This is a schematic diagram of the structure of the detachable diaphragm pump provided by this utility model after the connector has been disassembled. Figure 5 A schematic diagram of the connecting component of the separable diaphragm pump provided by this utility model.

[0018] Explanation of icon numbers: 10. Pump body; 11. Bottom shell; 11a. Flange; 12. Bearing; 13. Shaft; 13a. Straight key; 10a. Through hole; 20. Drive assembly; 21. Motor; 22. Coupling; 22a. Straight groove; 23. Motor fixing part; 231. Rotary slot; 231a. Snap-fit ​​hole; 231b. Inlet hole; 30. Connector; 30a. Opening; 30b. Sleeve; 31. Rotary buckle.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] 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 scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model 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 the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] 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 use of "and / or" or "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.

[0023] Please see Figures 1 to 3 This application proposes a separable diaphragm pump including a pump body 10, a drive assembly 20, and a connector 30. The pump body 10 includes a bottom shell 11, a bearing 12, and a rotating shaft 13. The bottom shell 11 has an inner cavity and a through hole 10a communicating with the inner cavity. The bearing 12 is installed at the through hole 10a. One end of the rotating shaft 13 is used for transmission connection with a transmission component located in the inner cavity, and the other end passes through the bearing 12. The drive assembly 20 includes a motor 21, a coupling 22, and a motor fixing component 23. The coupling 22 is installed in the motor fixing component 23, and one end of the rotating shaft 13 passing through the bearing 12 extends into the motor fixing component 23 and is coaxially connected with the coupling 22. The output shaft of the motor 21 extends into the motor fixing component 23 and is connected to the coupling 22. The connector 30 is sleeved on the outside of the bottom shell 11 and is detachably connected to the motor fixing component 23.

[0024] In this embodiment, the design of the inner cavity of the bottom shell 11 and the through hole 10a can be understood as a structural form for realizing the functional partitioning of the pump body 10. Its main purpose is to support the independent operation of the pump body 10 by physically isolating the internal space of the pump body 10 from the external environment.

[0025] Specifically, the inner cavity can accommodate transmission components and related liquid conveying parts, while the through hole 10a serves as a channel for the rotating shaft 13, ensuring that the rotating shaft 13 maintains stability and sealing when passing through the boundary of the pump body 10. For example, the sealing performance of the through hole 10a can be further improved by setting a sealing ring or using high-precision machining processes to meet the needs of different application scenarios.

[0026] Furthermore, the fit between the shaft 13 and the bearing 12 can be achieved using various technical means. For example, in addition to a tight fit, the shaft 13 and the bearing 12 can be fixed by using a locating pin or a threaded locking structure, thereby ensuring that the shaft 13 does not undergo axial or radial displacement during operation. The main purpose of this design is to provide reliable support for the shaft 13 while allowing it to rotate stably within the bearing 12.

[0027] In practical applications, the coupling 22 can be understood as a power transmission intermediary, efficiently transmitting the power output from the motor 21 to the pump body 10 shaft 13. Specifically, the coupling 22 can be connected to the shaft 13 and the output shaft of the motor 21 in various ways. For example, a keyway fit structure or a flexible connector 30 can be used to achieve power transmission. These methods can ensure coaxiality while allowing for a certain degree of axial deviation compensation, thereby improving the adaptability and reliability of the system.

[0028] The detachable connection of the connector 30 can be achieved in various ways. For example, the assembly and separation of the connector 30 and the motor fixing part 23 can be achieved through a snap-fit ​​structure, magnetic connection, or quick-locking mechanism. The main purpose of these methods is to simplify the operation process, enabling users to quickly separate or assemble the pump body 10 and the drive assembly 20 without tools, thereby improving the maintenance efficiency of the equipment.

[0029] The innovation of this application lies in constructing a separable mechanism between the pump body 10 and the drive assembly 20, which solves the problem of increased single-use costs and component waste caused by the integrated design of the pump body and drive motor in traditional diaphragm pumps. Specifically, this design allows only the contaminated pump body 10 to be replaced while retaining the drive assembly 20, thereby significantly reducing consumable costs and minimizing waste of core components such as the motor 21. It is particularly suitable for applications in medical settings that require frequent replacement of the pump body 10.

[0030] The working principle of this application is as follows: A separable diaphragm pump achieves separability between the pump body 10 and the drive assembly 20 through the coordinated design of the pump body 10, the drive assembly 20, and the connector 30. The pump body 10 includes a bottom shell 11, a bearing 12, and a rotating shaft 13. The bottom shell 11 has an inner cavity and a through hole 10a communicating with the inner cavity. The bearing 12 is installed at the through hole 10a, providing precise positioning support for the rotating shaft 13. One end of the rotating shaft 13 is used for transmission connection with a transmission component located in the inner cavity, and the other end passes through the bearing 12 and extends to the outside of the pump body 10, thus forming the physical basis for the independent operation of the pump body 10. Further, the drive assembly 20 includes a motor 21, a coupling 22, and a motor fixing member 23. The coupling 22 is installed inside the motor fixing member 23. One end of the rotating shaft 13, passing through the bearing 12, extends into the motor fixing member 23 and is coaxially connected to the coupling 22. The output shaft of the motor 21 extends into the motor fixing member 23 and is connected to the coupling 22. Therefore, the coupling 22, as a disengageable intermediate transmission unit, simplifies the alignment process while ensuring efficient power transmission, allowing the drive assembly 20 to operate independently of the pump body 10. Furthermore, the connector 30 is sleeved on the outside of the bottom shell 11 and detachably connected to the motor mounting component 23, achieving rapid physical coupling between the pump body 10 and the drive assembly 20 through this external sleeve structure. Specifically, when the pump body 10 becomes contaminated, the user only needs to operate the connector 30 to separate the pump body 10 from the drive assembly 20, without tools or complex disassembly, greatly improving replacement efficiency. As a preferred embodiment, this technical solution effectively solves the problem of needing to discard the entire pump body 10 after contamination in medical settings, making it possible to replace only the contaminated part of the pump body 10 while retaining the drive assembly 20, thereby significantly reducing consumable costs and minimizing waste of components such as the motor 21.

[0031] Please see Figures 1 to 3 This application further proposes that the outer wall of the motor fixing member 23 is provided with a rotating groove 231, and the side of the connector 30 facing the motor fixing member 23 is provided with a rotating buckle 31. By rotating relative to each other, the rotating buckle 31 is locked or released from the rotating groove 231, so that the motor fixing member 23 and the connector 30 can be detachably connected.

[0032] Specifically, the rotary slot 231 refers to a specific structure provided on the outer wall of the motor fixing component 23, which can be implemented using an annular groove, a strip groove, or other groove structures with guiding and limiting functions. The rotary latch 31 refers to a protruding structure provided on the inner side of the connector 30, which can be implemented using elastic claws, rigid protrusions, or other latching components that can cooperate with the rotary slot 231. The purpose of introducing the rotary slot 231 and the rotary latch 31 is to provide a quick locking and releasing connection mechanism, thereby simplifying the operation process of replacing the pump body 10 and improving the reliability of equipment operation.

[0033] In detail, this solution optimizes the detachable operation process of the connector 30 and the motor fixing component 23 through the cooperation mechanism of the rotating slot 231 and the rotating buckle 31. The rotating slot 231 set on the outer wall of the motor fixing component 23 serves as a fixed reference point, enabling the rotating buckle 31 on the connector 30 to achieve precise alignment through relative rotation, avoiding the misalignment risk caused by axial push and pull in traditional connection methods. The rotating buckle 31 on the side of the connector 30 facing the motor fixing component 23 slides naturally into the slot during rotation, completing the locking without additional tools, significantly simplifying the operation steps. Locking or releasing the buckle and slot through relative rotation replaces the multi-turn tightening process of threaded connections with the continuity of rotational motion, which not only reduces the operating force required but also ensures the stability of the locked state and the smoothness of the release action. In addition, this design, together with the basic structure such as the bottom shell 11 of the pump body 10 and the drive assembly 20, improves the applicability and maintenance efficiency of the equipment in high-frequency replacement scenarios, and effectively solves the problem of operational obstacles when quickly replacing the pump body 10 in medical scenarios.

[0034] Please see Figures 3 to 5 This application further proposes that the connector 30 is a connecting housing with an opening 30a on one side, and a sleeve 30b is provided at the end of the connecting housing away from the opening 30a; a flange 11a is provided on the outer peripheral wall of the bottom shell 11, the flange 11a extends into the connecting housing and is connected to the edge of the sleeve; a rotating buckle 31 is provided on the inner wall of the end of the connecting housing adjacent to the opening 30a, and the rotating buckle 31 is spaced apart from the sleeve 30b.

[0035] Specifically, the connecting housing refers to a housing assembly with a specific structural design, which can be made of metal or high-strength plastic to meet mechanical strength and durability requirements. The design of the opening 30a on one side allows users to directly access internal components, thus simplifying the disassembly process. In practical applications, the sleeve 30b is an annular structure at the end of the connecting housing away from the opening 30a. Its function is to form a stable mechanical connection point with the flange 11a of the bottom shell 11, ensuring balanced force and preventing displacement during operation. The flange 11a refers to the annular structure extending outward from the outer peripheral wall of the bottom shell 11. Its embedding into the connecting housing enhances tensile strength and sealing, reducing the risk of liquid leakage. Furthermore, the rotating latch 31 is a mechanical structure for quick locking and releasing. Its position is close to the opening 30a for easy operation and maintains a certain distance from the sleeve 30b to avoid interfering with the connection of the sleeve 30b during operation.

[0036] The efficient separation and reliable connection between the pump body 10 and the drive assembly 20 are achieved through the organic cooperation of the aforementioned components. The opening 30a of the connecting housing allows users to intuitively and easily operate the internal components with one hand, significantly improving disassembly efficiency. The fit between the sleeve 30b and the flange 11a of the bottom shell 11 forms a stable mechanical connection, ensuring the stability of the pump body 10 during operation. The rotating buckle 31 cooperates with the rotating slot 231 of the motor fixing component 23, realizing quick locking and releasing functions, while its spacing from the sleeve 30b ensures the safety and reliability of operation. This structural design not only solves the problems of complex disassembly and easy loosening of the connecting component 30, but also effectively reduces the damage to components caused by frequent disassembly, improving overall replacement efficiency and reliability.

[0037] Please see Figures 3 to 5 This application further proposes that the inner wall of the connecting housing is provided with a plurality of rotating buckles 31, and the plurality of rotating buckles 31 are arranged at intervals around the inner wall of the connecting housing; the outer wall of the motor fixing member 23 is provided with a plurality of rotating slots 231, and the plurality of rotating slots 231 are arranged at intervals around the outer wall of the motor fixing member 23; each rotating buckle 31 is engaged with a rotating slot 231.

[0038] By incorporating multiple rotating latches 31 evenly distributed around the inner wall of the connecting housing, the connection force is dispersed at multiple points. This layout effectively avoids the risk of a single latch bending or slipping under the full load, significantly improving the overall strength of the connection. Simultaneously, the design of multiple rotating slots 231 spaced apart around the outer wall of the motor mounting component 23 ensures precise matching between the slots and latches, allowing the connector 30 and the motor mounting component 23 to align synchronously during rotational engagement, reducing engagement resistance and improving operational accuracy. Furthermore, the one-to-one engagement mechanism between each rotating latch 31 and its corresponding rotating slot 231 ensures that even if individual latches wear or experience a decline in manufacturing tolerances, the remaining latches remain effectively locked, enhancing the redundancy and fault tolerance of the connection. This design is particularly suitable for high-frequency medical environments, ensuring a stable connection even under vibration or external loads, resolving connection loosening issues caused by localized stress concentration, and improving the safety and reliability of the equipment.

[0039] Please see Figures 3 to 5 This application further proposes that the rotating slot 231 includes a snap-fit ​​hole 231a and an inlet hole 231b communicating with the snap-fit ​​hole 231a, and the inlet hole 231b extends to the edge of the motor fixing member 23; the shape of the snap-fit ​​hole 231a and the shape of the buckle are both straight.

[0040] In practical applications, the guide hole 231b refers to the part that provides the initial guide path for the snap-fit, which can be achieved through a straight, curved, or combined guide path. The snap-fit ​​hole 231a refers to the part that ultimately realizes the snap-fit ​​locking function. The purpose of this design is to reduce installation complexity and improve connection reliability by optimizing the snap-fit ​​structure.

[0041] Specifically, the design of the inlet hole 231b connecting with the snap-fit ​​hole 231a, combined with the feature that the inlet hole 231b extends to the edge of the motor fixing member 23, allows the snap-fit ​​to slide naturally into the inlet hole 231b from any edge position of the motor fixing member 23 without the need for precise pre-alignment, thus significantly reducing the difficulty of operation. At the same time, the extension path of the inlet hole 231b provides continuous guidance for the snap-fit, guiding it smoothly to the snap-fit ​​hole 231a and avoiding jamming or wear problems caused by angular deviations. Both the snap-fit ​​hole 231a and the snap-fit ​​adopt a straight-line design. Based on the linear characteristics of the straight-line structure, the snap-fit ​​only needs to be aligned in a single direction when sliding into the snap-fit ​​hole 231a, simplifying the operation steps and reducing the risk of misoperation. Furthermore, the straight-line shape forms a tight linear fit after snap-fit, enhancing anti-rotation capability and effectively preventing loosening caused by vibration during pump body 10 operation, thereby ensuring the long-term reliability of the connection.

[0042] The above technical solution not only achieves quick and stable detachable connections, but also reduces manufacturing difficulty through standardized shapes, improving component interchangeability and service life. This design is particularly suitable for scenarios requiring frequent disassembly and assembly, solving the problems of cumbersome operation and unstable connections caused by the lack of an introduction mechanism and standardized design in traditional structures.

[0043] Please see Figures 3 to 5 This application further proposes that the motor 21 and the motor fixing part 23 are fixed by a threaded connection.

[0044] Specifically, a threaded connection refers to a connection method that achieves mechanical engagement through a helical structure. It can be implemented using metal threads, plastic threads, or composite material threads. In practical applications, the design of threaded connections needs to consider parameters such as pitch, thread profile, and engagement length to ensure the stability and detachability of the connection. The purpose of introducing threaded connections is to provide a solution that ensures reliable fixing between the motor 21 and the motor mounting component 23 while allowing for quick separation when needed.

[0045] This connection method utilizes the mechanical properties of a spiral structure to effectively avoid the risk of displacement due to vibration or liquid pressure. Furthermore, when it is necessary to replace the contaminated pump body 10, the motor 21 can be quickly separated from the motor mounting bracket 23 by reverse rotation, without the need for additional tools or complex operations. In particular, this design is optimized for the high-frequency replacement requirements in medical settings; its spiral structure not only enhances the tensile strength of the connection but also supports one-handed operation, making the disassembly and assembly process more efficient and reliable in emergency surgical environments. Moreover, this connection method directly supports the goal of enabling independent replacement of the pump body 10 in the separable diaphragm pump, avoiding unnecessary disposal of the motor 21 and transmission components.

[0046] Please see Figures 3 to 5 This application further proposes that the shaft 13 and the bearing 12 be fixed by a tight fit to ensure a stable connection.

[0047] Specifically, the tight fit refers to a connection method that achieves mechanical locking through an interference fit, which can be implemented using processes such as heat fitting, cold shrinkage, or press-fitting. In practical applications, the purpose of introducing the tight fit method is to eliminate the clearance between the rotating shaft 13 and the bearing 12 hole, thereby avoiding shaking or displacement problems caused by external forces.

[0048] By tightly fitting the shaft 13 and bearing 12 together without any clearance, axial or radial displacement of the shaft 13 during rotation is effectively prevented. This robust connection not only significantly reduces vibration and noise but also ensures the continuous and effective operation of the sealing system, preventing wear or failure of the seals due to relative motion. Based on this, the sealing reliability of the pump body 10 is improved under high pressure or high frequency operation, especially in medical applications, fundamentally reducing the possibility of liquid leakage, ensuring equipment safety, and reducing the risk of cross-infection. Furthermore, the high stability of the tight-fit connection between the shaft 13 and bearing 12, combined with the overall structural design of the pump body 10, further enhances the durability and service life of key moving parts, providing reliable support for the long-term stable operation of medical equipment.

[0049] Please see Figures 3 to 5 This application further proposes that the bearing 12 and the bottom shell 11 of the pump body 10 are fixed by a tight fit.

[0050] Specifically, a tight fit refers to a fixing method that uses interference fit design to achieve a mechanical connection. This can be achieved through pressure assembly, thermoelectric assembly, or hydraulic assembly. In practical applications, the interference fit needs to be precisely calculated based on the material properties and dimensional tolerances of the outer ring of the bearing 12 and the inner wall of the through hole 10a in the base housing 11 to ensure the reliability of the connection. Its purpose is to eliminate the clearance that may occur with a traditional loose fit, thereby preventing relative displacement of the bearing 12 during operation.

[0051] In detail, this design uses a tight fit to create a secure connection between the bearing 12 and the bottom shell 11 of the pump body 10. This connection effectively maintains the sealing integrity at the through hole 10a. During pump body 10 operation, the tight fit ensures that there is no possibility of slippage or rotation between the bearing 12 and the bottom shell 11, preventing liquid leakage from the interface between the bearing 12 and the bottom shell 11. Simultaneously, this fixing method ensures precise alignment of the rotating shaft 13, making the transmission process smoother and more reliable. In the overall design of the separable diaphragm pump, when the pump body 10 needs to be discarded due to contact with bodily fluids, the reliability of the tight fit ensures a stable connection between the bottom shell 11 and the bearing 12, avoiding the risk of the bearing 12 falling off or being damaged during separation, thereby improving the convenience and safety of pump body 10 replacement.

[0052] Please see Figures 3 to 5 This application further proposes that the coupling 22 and the rotating shaft 13 are connected by a straight-line limiting structure for transmission.

[0053] Specifically, the linear limiting structure refers to a connection method that achieves radial constraint based on a linear fit. This can be achieved by setting a convex key at the end of the coupling 22 and a groove at the end of the rotating shaft 13, or by using other similar linear limiting designs. The purpose of this structure is to provide rigid constraint in the radial direction, preventing relative rotation or axial sliding between the coupling 22 and the rotating shaft 13, while retaining the freedom of axial separation to meet the actual application requirements of separable diaphragm pumps.

[0054] The linear limiting structure in this design achieves precise fit between the coupling 22 and the shaft 13 by providing a linear groove 22a at the end of the coupling 22 and a matching linear key 13a at the end of the shaft 13. This linear fit not only effectively avoids energy loss and component wear caused by vibration or tolerances, but also allows for quick disassembly by direct axial pulling when the pump body 10 needs to be replaced, without the need for additional rotational adjustments. Furthermore, this structure, combined with the overall design of the pump body 10 and the drive assembly 20, ensures stability and efficiency during power transmission, while simplifying the separation operation process and significantly improving the practicality and maintenance convenience of the separable diaphragm pump for high-frequency replacement in medical settings.

[0055] Please see Figures 3 to 5 This application further proposes that the above-mentioned separable diaphragm pump has a straight-line limiting structure including a straight-line groove 22a disposed at the end of the coupling 22, and a straight-line convex key 13a disposed at the end of the rotating shaft 13 and adapted to the straight-line groove 22a.

[0056] Specifically, the straight groove 22a refers to a positioning component with a straight protruding structure, which can be achieved through metal cutting, injection molding, or stamping. This design provides a clear positioning reference, allowing for quick alignment based on the shape of the key during installation, reducing assembly errors. In practical applications, the straight key 13a can be understood as a straight recessed structure that matches the key, which can be manufactured through machining or mold forming processes. The shape of the groove matches the key, forming a precise sliding fit, effectively preventing relative rotation during transmission and ensuring that torque is stably transmitted from the motor 21 side to the pump body 10 side.

[0057] In detail, this solution solves the problem of inaccurate transmission fit by defining the straight groove 22a and its mating method. The straight groove 22a at the end of the coupling 22 and the straight key 13a at the end of the shaft 13 form a tight fit, ensuring that the fit remains tight and is not easily worn after multiple disassemblies and reassemblies. This design not only extends the service life of the pump but also simplifies maintenance. Furthermore, since both the key and the groove are straight, this structure provides convenient detachable operation while ensuring connection reliability, thus optimizing the overall user experience. In addition, this limiting structure design, combined with the detachable connection of the pump body 10 and the drive assembly 20, further enhances the applicability of the diaphragm pump in scenarios requiring frequent replacement.

[0058] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A separable diaphragm pump, characterized in that, The separable diaphragm pump includes: The pump body includes a bottom shell, a bearing, and a rotating shaft. The bottom shell has an inner cavity and a through hole communicating with the inner cavity. The bearing is installed at the through hole. One end of the rotating shaft is used for transmission connection with a transmission component located in the inner cavity, and the other end passes through the bearing. A drive assembly, comprising a motor, a coupling, and a motor mounting bracket, wherein the coupling is mounted within the motor mounting bracket, and one end of the rotating shaft passing through the bearing extends into the motor mounting bracket and is coaxially connected to the coupling; the output shaft of the motor extends into the motor mounting bracket and is connected to the coupling; and A connector is fitted onto the outside of the bottom shell and is detachably connected to the motor fixing component.

2. The separable diaphragm pump as described in claim 1, characterized in that, The outer wall of the motor fixing component is provided with a rotating slot, and the side of the connector facing the motor fixing component is provided with a rotating buckle. By rotating relative to each other, the rotating buckle is locked or released from the rotating slot, so that the motor fixing component and the connector are detachably connected.

3. The separable diaphragm pump as described in claim 2, characterized in that, The connector is a connecting housing with an opening on one side, and the end of the connecting housing away from the opening is provided with a sleeve. The outer peripheral wall of the bottom shell is provided with a flange, which extends into the connecting shell and connects with the edge of the sleeve; the inner wall of the connecting shell near the opening is provided with a rotating buckle, which is spaced apart from the opening of the sleeve.

4. The separable diaphragm pump as described in claim 3, characterized in that, The inner wall of the connecting housing is provided with a plurality of rotating buckles, which are arranged at intervals around the inner wall of the connecting housing. The outer wall of the motor fixing component is provided with a plurality of rotating slots, which are arranged at intervals around the outer wall of the motor fixing component; each rotating buckle engages with one of the rotating slots.

5. The separable diaphragm pump as described in claim 4, characterized in that, The rotating slot includes a snap-fit ​​hole and an inlet hole communicating with the snap-fit ​​hole, and the inlet hole extends to the edge of the motor fixing component; the shape of the snap-fit ​​hole and the shape of the buckle are both straight.

6. The separable diaphragm pump as claimed in claim 1, characterized in that, The motor is fixed to the motor mounting component by a threaded connection.

7. The separable diaphragm pump as claimed in claim 1, characterized in that, The rotating shaft and the bearing are fixed together by a tight fit.

8. The separable diaphragm pump as claimed in claim 1, characterized in that, The bearing is fixed to the bottom shell of the pump body by a tight fit.

9. The separable diaphragm pump as claimed in claim 1, characterized in that, The coupling and the pump body shaft are connected by a straight-line limiting structure.

10. The separable diaphragm pump as claimed in claim 9, characterized in that, The straight-line limiting structure includes a straight-line groove disposed at the end of the coupling, and a straight-line convex key disposed at the end of the rotating shaft and adapted to the straight-line groove.

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