Diaphragm pump

Abstract

The diaphragm pump comprises a diaphragm pump body, an eccentric wheel, a rotary connecting piece and a motor, and the diaphragm pump body comprises a diaphragm fixing frame; the eccentric wheel is configured to be of an integrated structure and is provided with a connecting convex part; the rotary connecting piece is mounted on the connecting convex part and is connected with the diaphragm fixing frame, so that the connecting convex part can rotate relative to the diaphragm fixing frame through the rotary connecting piece to drive the diaphragm fixing frame to move up and down; the motor is in transmission connection with the eccentric wheel and used for driving the eccentric wheel to rotate. According to the diaphragm pump, the eccentric wheel and the diaphragm fixing frame are in transmission connection directly through the rotary connecting piece, so that a transmission shaft can be saved, and the effect of reducing the cost is achieved; and moreover, the connecting convex part on the eccentric wheel is directly connected with the rotary connecting piece, so that the eccentric wheel can be conveniently connected with the diaphragm fixing frame, and the effects of saving labor and reducing cost are achieved.

Description

Technical Field

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

[0002] When the diaphragm pump is working, it uses compressed air or electricity as a power source to change the volume in the pump chamber through the back and forth movement of the diaphragm, thereby achieving the suction and discharge of liquid.

[0003] Currently, existing diaphragm pumps typically feature a drive shaft mounted on an eccentric wheel. A bearing is mounted on the end of the drive shaft away from the eccentric wheel. This bearing provides a transmission connection to the diaphragm holder. As the eccentric wheel rotates, the bearing drives the diaphragm holder up and down, which in turn drives the diaphragm back and forth, achieving liquid suction and discharge. Because the drive shaft is made of metal, it is expensive, increasing the overall manufacturing cost of the diaphragm pump. Utility Model Content

[0004] In view of this, it is necessary to provide a diaphragm pump that can solve the above technical problems.

[0005] To solve the above technical problems, this application provides the following technical solutions:

[0006] A diaphragm pump, comprising:

[0007] Diaphragm pump body, including diaphragm fixing frame;

[0008] The eccentric wheel is configured as an integrated structure, and the eccentric wheel has a connecting protrusion;

[0009] a rotating connecting member, mounted on the connecting protrusion and connected to the diaphragm fixing frame, so that the connecting protrusion can rotate relative to the diaphragm fixing frame through the rotating connecting member, thereby driving the diaphragm fixing frame to move up and down;

[0010] The motor is connected to the eccentric wheel and is used to drive the eccentric wheel to rotate.

[0011] It can be understood that by installing a rotating connecting piece on the connecting protrusion of the eccentric wheel and driving the diaphragm fixing frame to move up and down through the rotating connecting piece, the eccentric wheel and the diaphragm fixing frame are directly connected to each other through the rotating connecting piece, which saves the transmission shaft and thus reduces costs. Moreover, the connecting protrusion on the eccentric wheel is directly connected to the rotating connecting piece, which facilitates the connection between the eccentric wheel and the diaphragm fixing frame, thereby saving labor and reducing costs.

[0012] In one embodiment, the eccentric wheel further comprises a main body, and the eccentric wheel can be connected to the motor through the main body; the connecting protrusion is provided on the main body and connected to the main body as a whole, and the connecting protrusion is eccentrically arranged relative to the main body;

[0013] Wherein, a resisting inclined surface is formed on the main body, and the resisting inclined surface abuts against the rotating connecting member to control the up and down movement of the diaphragm fixing frame under the drive of the rotating connecting member.

[0014] It can be understood that the push inclined surface on the main body is used to abut against the rotating connecting member, so that the assembly of the rotating connecting member on the eccentric wheel can be facilitated.

[0015] In one embodiment, a step surface is formed on the diaphragm fixing frame, and the step surface is in contact with an end of the rotating connection member away from the push inclined surface, and the rotating connection member can push the diaphragm fixing frame to move up and down through the step surface.

[0016] In one embodiment, a first key slot is formed on the main body, and the first key slot can be plugged into and fitted with the rotating shaft of the motor;

[0017] Wherein, a second key groove is formed on the connecting protrusion, the second key groove has the same groove diameter as the first key groove and is connected to each other, and the rotating shaft portion can pass through the first key groove and extend into the second key groove.

[0018] It can be understood that, through the above-mentioned structural setting, the rotating shaft of the motor can be inserted into the first keyway and the second keyway in sequence, so that the contact area between the rotating shaft and the eccentric wheel can be increased, thereby improving the stability of the rotating shaft when driving the eccentric wheel to rotate.

[0019] In one embodiment, the connecting protrusion is further provided with a through hole, and the through hole is communicated with the second key groove;

[0020] Wherein, the diameter of the through hole is smaller than the diameter of the second keyway.

[0021] It can be understood that by providing a through hole on the connecting protrusion and connecting it to the second keyway and the first keyway respectively, the excess gas generated when the rotating shaft part and the eccentric wheel are assembled and when the rotating shaft part drives the eccentric wheel to rotate can be discharged through the through hole, thereby playing a ventilation role; at the same time, by setting the structure that the aperture of the through hole is smaller than the slot diameter of the second keyway, the stroke of the rotating shaft part inserted into the eccentric wheel can be limited, which can facilitate the assembly between the rotating shaft part and the eccentric wheel.

[0022] In one embodiment, the eccentric wheel is configured as a plastic injection molded part.

[0023] It is understandable that configuring the eccentric wheel as a plastic injection molded part enables the eccentric wheel to be injection molded in one piece, which has the effect of reducing costs.

[0024] In one embodiment, the rotating connection member is configured as a bearing.

[0025] It can be understood that configuring the rotating connection member as a bearing allows the rotating connection member to be made of the same material, which has the effect of reducing costs.

[0026] In one embodiment, the bearing includes an inner ring and an outer ring, wherein the outer ring is arranged outside the inner ring and is rotatably connected to the inner ring;

[0027] The connecting protrusion is connected to the inner ring in a tight fit manner, and the diaphragm fixing frame is connected to the outer ring in a clearance fit manner.

[0028] In one embodiment, the diaphragm fixing frame has an extending protrusion, and the extending protrusion is sleeved on the rotating connecting member and connected to the rotating connecting member;

[0029] Along the radial direction of the rotating connection member, the connecting protrusion, the rotating connection member and the extending protrusion are stacked.

[0030] In one embodiment, the extending protrusion has at least three claw portions, and the at least three claw portions are sequentially spaced apart along the circumferential direction of the rotating connection member.

[0031] Due to the application of the above solution, this application has the following advantages compared to the prior art:

[0032] The diaphragm pump claimed for protection in the present application is characterized in that a rotating connector is installed on the connecting protrusion of the eccentric wheel, and the diaphragm fixing frame is driven up and down by the rotating connector. In this way, the eccentric wheel and the diaphragm fixing frame are directly connected by the rotating connector, which saves the transmission shaft and thus reduces costs. Moreover, the connecting protrusion on the eccentric wheel is directly connected to the rotating connector, which facilitates the connection between the eccentric wheel and the diaphragm fixing frame, thereby saving labor and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 This is a schematic structural diagram of a diaphragm pump provided in one embodiment of the present application.

[0035] Figure 2 This is an exploded view of a diaphragm pump provided in one embodiment of the present application.

[0036] Figure 3 A cross-sectional view of a diaphragm pump provided in accordance with an embodiment of the present application.

[0037] Figure 4 for Figure 3 Enlarged view of the P part.

[0038] Figure 5 This is a schematic diagram of the connection between the eccentric wheel, the rotating connecting member and the diaphragm fixing frame provided in one embodiment of the present application.

[0039] Figure 6 This is a schematic structural diagram of an eccentric wheel provided in one embodiment of the present application.

[0040] Figure 7 This is a structural schematic diagram of the eccentric wheel provided in one embodiment of the present application from another perspective.

[0041] Figure 8 This is a structural diagram of a diaphragm fixing frame provided in one embodiment of the present application.

[0042] The reference numerals of the components are as follows:

[0043] 100. Diaphragm pump; 10. Diaphragm pump body; 11. Diaphragm fixing frame; 111. Extended protrusion; 1111. Clamping claw; 112. Step surface; 20. Eccentric wheel; 21. Connecting protrusion; 211. Second keyway; 212. Through hole; 213. Guide portion; 22. Main body; 221. Pushing inclined surface; 222. First keyway; 30. Rotating connecting member; 31. Inner ring; 32. Outer ring; 40. Motor; 41. Rotating shaft; 50. Diaphragm. DETAILED DESCRIPTION

[0044] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0045] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0049] like Figures 1 to 8 As shown, a diaphragm pump 100 provided in an embodiment of the present application includes a diaphragm pump body 10, an eccentric wheel 20, a rotating connector 30 and a motor 40. The diaphragm pump body 10 includes a diaphragm fixing frame 11; the eccentric wheel 20 is configured as an integrated structure, and the eccentric wheel 20 has a connecting protrusion 21; the rotating connector 30 is installed on the connecting protrusion 21 and is connected to the diaphragm fixing frame 11, so that the connecting protrusion 21 can be rotated relative to the diaphragm fixing frame 11 through the rotating connector 30 to drive the diaphragm fixing frame 11 to move up and down; the motor 40 is transmission-connected to the eccentric wheel 20 for driving the eccentric wheel 20 to rotate.

[0050] It can be understood that the diaphragm pump 100 of the present application installs a rotating connector 30 on the connecting protrusion 21 of the eccentric wheel 20, and drives the diaphragm fixing frame 11 to move up and down through the rotating connector 30, and then drives the diaphragm 50 in the diaphragm pump 100 to move back and forth through the diaphragm fixing frame 11. In this way, the eccentric wheel 20 and the diaphragm fixing frame 11 are directly connected to each other by the rotating connector 30, which can save the transmission shaft and thus reduce costs. Moreover, the connecting protrusion 21 on the eccentric wheel 20 is directly connected to the rotating connector 30, so that the connection between the eccentric wheel 20 and the diaphragm fixing frame 11 can be facilitated, which saves labor and reduces costs.

[0051] It should be noted that the specific structural composition and working principle of the diaphragm pump 100 can adopt existing conventional methods, which will not be elaborated here.

[0052] In one embodiment, if Figure 4 、 Figure 8 As shown, the diaphragm fixing frame 11 has an extension protrusion 111, and the extension protrusion 111 is sleeved on the rotating connection member 30 and connected to the rotating connection member 30; along the radial direction of the rotating connection member 30, the connecting protrusion 21, the rotating connection member 30 and the extension protrusion 111 are stacked.

[0053] In one embodiment, if Figure 4 、 Figure 8 As shown, the extending protrusion 111 has at least three claw portions 1111 , and the at least three claw portions 1111 are sequentially spaced apart along the circumferential direction of the rotating connector 30 .

[0054] In one embodiment, the eccentric wheel 20 is configured as a plastic injection molded part. This allows the eccentric wheel 20 to be integrally injection molded, thereby reducing costs. The eccentric wheel is made of polyketone material, which, by utilizing the properties of polyketone, can extend the service life of the eccentric wheel, thereby meeting the requirements of the diaphragm pump for continuous operation under high pressure.

[0055] In one embodiment, if Figure 4 、 Figure 6 As shown, the eccentric wheel 20 further includes a main body 22, and the eccentric wheel 20 can be transmission-connected to the motor 40 through the main body 22. The connecting protrusion 21 is provided on the main body 22 and connected to the main body 22 as a whole. The connecting protrusion 21 is eccentrically arranged relative to the main body 22. The main body 22 is formed with a push-bevel surface 221, which abuts against the rotating connector 30 to control the up and down movement of the diaphragm fixing frame 11 under the drive of the rotating connector 30. The push-bevel surface 221 on the main body 22 abuts against the rotating connector 30, thereby facilitating the assembly of the rotating connector 30 on the eccentric wheel 20.

[0056] In one embodiment, if Figure 4 、 Figure 6 As shown, a stepped surface 112 is formed on the diaphragm holder 11. The stepped surface 112 abuts against the end of the rotating connector 30 that is away from the inclined surface 221. Furthermore, the rotating connector 30 can push the diaphragm holder 11 upward and downward via the stepped surface 112. This ensures the stability of the diaphragm holder 11 as it moves upward and downward under the push of the rotating connector 30.

[0057] In one embodiment, if Figure 4 、 Figure 7 As shown, the main body 22 is provided with a first keyway 222, which can be plugged into the rotating shaft 41 of the motor 40. A second keyway 211 is provided on the connecting protrusion 21. The second keyway 211 and the first keyway 222 have the same diameter and are interconnected. Furthermore, the rotating shaft 41 can pass through the first keyway 222 and extend into the second keyway 211. This arrangement allows the rotating shaft 41 of the motor 40 to be sequentially inserted into the first keyway 222 and the second keyway 211. This increases the contact area between the rotating shaft 41 and the eccentric 20, thereby improving the stability of the rotating shaft 41 when driving the eccentric 20 to rotate.

[0058] In one embodiment, if Figure 4 、 Figure 7 As shown, the connecting protrusion 21 is further provided with a through hole 212, which is in communication with the second key slot 211; wherein the aperture of the through hole 212 is smaller than the slot diameter of the second key slot 211. By providing the through hole 212 on the connecting protrusion 21 and communicating with the second key slot 211 and the first key slot 222, respectively, excess gas generated during the assembly of the rotating shaft portion 41 and the eccentric wheel 20 and during the process of the rotating shaft portion 41 driving the eccentric wheel 20 to rotate can be discharged through the through hole 212, thus providing ventilation. At the same time, the structural setting of the through hole 212 having a smaller aperture than the slot diameter of the second key slot 211 can limit the insertion stroke of the rotating shaft portion 41 into the eccentric wheel 20, thereby facilitating the assembly between the rotating shaft portion 41 and the eccentric wheel 20.

[0059] In one embodiment, the rotating connection member 30 is configured as a bearing. This configuration allows the rotating connection member 30 to be made of readily available materials, thereby reducing costs.

[0060] like Figure 4 、 Figure 5 As shown, the bearing includes an inner ring 31 and an outer ring 32. The outer ring 32 is disposed outside the inner ring 31 and is rotatably connected to the inner ring 31. The connecting protrusion 21 is connected to the inner ring 31 with a tight fit, and the diaphragm holder 11 is connected to the outer ring 32 with a clearance fit. Here, the bearing inner ring 31 abuts against the push-bevel surface 221 of the main body 22.

[0061] In this embodiment, Figure 6 As shown, a guide portion 213 is formed on the connecting protrusion 21. The connecting protrusion 21 can be press-fitted onto the bearing using the fit between the guide portion 213 and the inner ring 31 of the bearing as a guide. In this way, the connecting protrusion 21 can use the guide portion 213 to guide the eccentric wheel 20 so that it can be inserted into the bearing.

[0062] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A diaphragm pump, characterized in that: The diaphragm pump (100) comprises: A diaphragm pump body (10) includes a diaphragm fixing frame (11); The eccentric wheel (20) is configured as an integrated structure, and the eccentric wheel (20) has a connecting protrusion (21); a rotating connecting member (30) mounted on the connecting protrusion (21) and connected to the diaphragm fixing frame (11), so that the connecting protrusion (21) can rotate relative to the diaphragm fixing frame (11) through the rotating connecting member (30), thereby driving the diaphragm fixing frame (11) to move up and down; The motor (40) is in driving connection with the eccentric wheel (20) and is used to drive the eccentric wheel (20) to rotate.

2. The diaphragm pump according to claim 1, characterized in that The eccentric wheel (20) further comprises a main body (22), and the eccentric wheel (20) can be transmission-connected to the motor (40) through the main body (22); the connecting protrusion (21) is provided on the main body (22) and is integrally connected to the main body (22), and the connecting protrusion (21) is eccentrically arranged relative to the main body (22); A push-in inclined surface (221) is formed on the main body (22), and the push-in inclined surface (221) abuts against the rotating connection member (30) to control the up and down movement of the diaphragm fixing frame (11) driven by the rotating connection member (30).

3. The diaphragm pump according to claim 2, characterized in that A step surface (112) is formed on the diaphragm fixing frame (11), and the step surface (112) is in contact with an end of the rotating connecting member (30) away from the push inclined surface (221), and the rotating connecting member (30) can push the diaphragm fixing frame (11) through the step surface (112) to move up and down.

4. The diaphragm pump according to claim 2, characterized in that The main body (22) is provided with a first keyway (222), and the first keyway (222) can be plugged into and matched with the rotating shaft (41) of the motor (40); A second key groove (211) is provided on the connecting protrusion (21), the second key groove (211) has the same groove diameter as the first key groove (222) and is connected to each other, and the rotating shaft portion (41) can pass through the first key groove (222) and extend into the second key groove (211).

5. The diaphragm pump according to claim 4, characterized in that The connecting protrusion (21) is further provided with a through hole (212), and the through hole (212) is communicated with the second key groove (211); Wherein, the diameter of the through hole (212) is smaller than the diameter of the second keyway (211).

6. The diaphragm pump according to claim 1, characterized in that The eccentric wheel (20) is configured as a plastic injection molded part.

7. The diaphragm pump according to claim 1, characterized in that The rotating connection member (30) is configured as a bearing.

8. The diaphragm pump according to claim 7, characterized in that The bearing comprises an inner ring (31) and an outer ring (32), wherein the outer ring (32) is arranged outside the inner ring (31) and is rotatably connected to the inner ring (31); The connecting protrusion (21) is connected to the inner ring (31) in a tight fit manner, and the diaphragm fixing frame (11) is connected to the outer ring (32) in a clearance fit manner.

9. The diaphragm pump according to claim 1, characterized in that The diaphragm fixing frame (11) has an extending protrusion (111), and the extending protrusion (111) is sleeved on the rotating connecting member (30) and connected to the rotating connecting member (30); Along the radial direction of the rotating connection member (30), the connecting protrusion (21), the rotating connection member (30) and the extending protrusion (111) are arranged in a stacked manner.

10. The diaphragm pump according to claim 9, characterized in that The extending protrusion (111) has at least three claw portions (1111), and the at least three claw portions (1111) are sequentially spaced along the circumferential direction of the rotating connection member (30).

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