Diaphragm pump

Abstract

The utility model discloses a diaphragm pump which comprises a main diaphragm, the main diaphragm comprises a diaphragm body and stretching rods, the diaphragm body is concaved inwards to form diaphragm cavities on one side and protruding parts on the other side opposite to the diaphragm cavities, the number of the diaphragm cavities and the number of the protruding parts are both three, the protruding parts and the stretching rods are arranged in a one-to-one correspondence mode, and the stretching rods are arranged on the diaphragm body in a one-to-one correspondence mode. One end of the stretching rod is provided with a concave part, the convex part is embedded in the concave part, a plurality of first buckles are distributed on the convex part in the circumferential direction, a plurality of second buckles are distributed on the inner wall of the concave part in the circumferential direction, the first buckles and the second buckles are arranged in a one-to-one correspondence mode, and the first buckles are connected to the second buckles in a clamped mode. The main diaphragm is arranged to be the combination of the diaphragm body and the stretching rod, the abrasion resistance of the stretching rod is improved, the stretching rod is arranged on the outer side of the protruding part in a sleeving mode through the concave part, the first buckles are connected to the second buckles in a clamped mode, reliable connection with the diaphragm body is achieved, the stretching rod and the diaphragm body are prevented from falling off, and the service life of the main diaphragm is prolonged.

Description

Technical Field

[0001] The utility model relates to a diaphragm pump. Background Art

[0002] At present, the diaphragm pump includes a DC motor, a cam, a main diaphragm, and a triangular bracket. The main diaphragm is provided with three stretching rods, which are connected to the triangular bracket. During operation, the DC motor drives the cam to move, and the cam drives the triangular bracket to move, so that the three cavities of the main diaphragm move back and forth to achieve the purpose of pumping and draining water. However, the main diaphragm of this diaphragm pump is integrated and its material is rubber. When the negative pressure at the front end of the diaphragm pump is too high due to some external reasons, the triangular bracket will strongly stretch the stretching rods of the three cavities on the main diaphragm, causing friction between the triangular bracket and the stretching rod of the main diaphragm, reducing the service life of the stretching rod, and even in more serious cases, causing the stretching rod to break, making the diaphragm pump fail. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a diaphragm pump in order to overcome the defect that the main diaphragm of the diaphragm pump in the prior art is easily damaged.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A diaphragm pump comprises a main diaphragm, wherein the main diaphragm comprises a diaphragm body and a stretching rod, wherein the diaphragm body is recessed inwardly to form a diaphragm cavity on one side and a protrusion on the other side opposite to the diaphragm cavity, wherein the number of the diaphragm cavities and the number of the protrusions are both three, and the protrusions are arranged in a one-to-one correspondence with the stretching rods, wherein one end of the stretching rod has a recessed portion, wherein the protrusion is embedded in the recessed portion, wherein the protrusion has a plurality of first buckles distributed along the circumferential direction, and the inner wall of the recessed portion has a plurality of second buckles distributed along the circumferential direction, wherein the first buckle and the second buckle are arranged in a one-to-one correspondence, and the first buckle is snap-connected to the second buckle.

[0006] In this solution, the main diaphragm of the diaphragm pump includes a diaphragm body and a pulling rod. The diaphragm body is made of elastic material, and the size of the diaphragm cavity is changed by deformation, while the pulling rod is used to drive the deformation of the diaphragm body. The main diaphragm is set as a combination of the diaphragm body and the pulling rod, and the materials of the pulling rod and the diaphragm body can be set to be different, thereby improving the wear resistance of the pulling rod. Even if the negative pressure at the front end of the diaphragm pump is too high due to some external reasons, the triangular bracket strongly stretches the pulling rod on the main diaphragm, which will cause the deformation of the diaphragm body, while the deformation of the pulling rod is small or even not deformed, so it is not easy to cause damage to the pulling rod, thereby improving the service life of the main diaphragm. In addition, the pulling rod is set on the outside of the protruding part through the concave part and the first buckles are connected to the second buckles through the clamping, so as to achieve a reliable connection with the diaphragm body, prevent the pulling rod from falling off the diaphragm body, and improve the connection effect of the pulling rod and the diaphragm body. Furthermore, the first buckles and the second buckles are distributed along the circumferential direction, so that the pulling rod and the protruding part are evenly stressed. When the diaphragm pump is working, the stretching rod drives the diaphragm body to deform to change the size of the diaphragm cavity, so that the diaphragm pump sucks liquid from the inlet or discharges the liquid in the diaphragm cavity. The three diaphragm cavities of the main diaphragm deform alternately, realizing the pumping function of the diaphragm pump.

[0007] Preferably, the diaphragm body and the stretch rod are injection molded.

[0008] Preferably, the first buckle is a raised column, the second buckle is a fixing hole, the end of the raised column has a flange, the raised column passes through the fixing hole, and the flange is buckled on the outside of the fixing hole.

[0009] In this solution, a plurality of protruding columns are embedded in a plurality of fixing holes, so that the protruding part and the stretching rod are embedded with each other, thereby improving the connection and fixing effect. The diameter of the flange is larger than the diameter of the protruding column. When the flange is buckled on the outside of the fixing hole, the flange buckles the stretching rod to form an anti-slip structure, thereby improving the connection effect between the stretching rod and the diaphragm body.

[0010] Preferably, the raised portion has a plurality of third buckles distributed along the circumferential direction, the recessed portion has a plurality of fourth buckles distributed along the circumferential direction, the third buckles are arranged in one-to-one correspondence with the fourth buckles, and the third buckles are snap-connected to the fourth buckles.

[0011] In this solution, a plurality of third buckles are snap-connected to the fourth buckle, so that the stretching rod is firmly connected to the diaphragm body, further improving the connection effect between the stretching rod and the diaphragm body.

[0012] Preferably, the third buckle is located on the same straight line as the first buckle along the axial direction and is located below the first buckle, and the fourth buckle is located on the same straight line as the second buckle along the axial direction and is located below the second buckle.

[0013] In this solution, the above-mentioned structural setting is adopted to improve the connection and fixing effect, and also facilitate mold making and injection molding.

[0014] Preferably, the third buckle is a groove, the fourth buckle is a raised undercut, and the undercut is embedded in the groove.

[0015] In this solution, the undercut is embedded in the groove to form an anti-slip structure, so that the stretching rod is firmly connected to the diaphragm body, further improving the connection effect between the stretching rod and the diaphragm body.

[0016] Preferably, the diaphragm body is made of rubber, and the stretching rod is made of plastic.

[0017] In this solution, the above structural arrangement is adopted to improve the wear resistance of the stretching rod.

[0018] Preferably, the middle portion of the stretching rod has a connecting portion, and the diameter of the connecting portion is smaller than the diameters of the two ends of the stretching rod;

[0019] The diaphragm pump also includes a triangular bracket having three support arms, each of which is provided with a mounting hole, the diameter of one end of the stretching rod away from the diaphragm body is larger than the inner diameter of the mounting hole, and the connecting portion is passed through the mounting hole.

[0020] In this solution, the diameter of the end of the stretching rod away from the diaphragm body is larger than the inner diameter of the mounting hole, so that the connecting portion is inserted into the mounting hole to achieve the connection between the stretching rod and the diaphragm body without providing other fixing structures. When the tripod is vibrating, the stretching rod will not fall out of the mounting hole because the diameter of the end of the stretching rod away from the diaphragm body is larger than the inner diameter of the mounting hole.

[0021] Preferably, each of the mounting holes has an open slot, and the inner diameter of the open slot gradually decreases from the outer side to the inner side.

[0022] In this solution, the opening groove is provided to facilitate the connection part to be inserted into the mounting hole through the opening groove. Since the inner diameter of the opening groove gradually decreases from the outside to the inside, a closed structure is formed to prevent the stretching rod from falling out of the opening groove.

[0023] Preferably, the diaphragm pump further comprises a support frame, wherein the support frame is sleeved on the main diaphragm, wherein the middle portion of the support frame has a raised abutment portion, wherein the abutment portion is arranged corresponding to the middle portion of the triangular bracket and maintains a preset distance from the support frame.

[0024] In this solution, by providing the abutment portion, the support frame abuts against the abutment portion when vibrating at the maximum amplitude, thereby preventing the support frame from contacting the diaphragm body and thus damaging the diaphragm body, thereby increasing the service life of the diaphragm body.

[0025] Preferably, the material of the stretching rod is the same as that of the tripod bracket.

[0026] In this solution, the above-mentioned structural arrangement is adopted to improve the wear resistance between the stretching rod and the tripod bracket.

[0027] Preferably, the material of the stretch rod and the material of the tripod bracket are both polyoxymethylene (POM).

[0028] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0029] The positive and progressive effect of the utility model is that the main diaphragm of the diaphragm pump includes a diaphragm body and a pulling rod, the diaphragm body is made of elastic material, and the size of the diaphragm cavity is changed by deformation, and the pulling rod is used to drive the deformation of the diaphragm body. The main diaphragm is set as a combination of the diaphragm body and the pulling rod, and the materials of the pulling rod and the diaphragm body can be set to be different, thereby improving the wear resistance of the pulling rod. Even if the negative pressure at the front end of the diaphragm pump is too high due to some external reasons, the triangular bracket strongly stretches the pulling rod on the main diaphragm, which will cause the deformation of the diaphragm body, while the deformation of the pulling rod is small or even not deformed, so it is not easy to cause damage to the pulling rod, thereby improving the service life of the main diaphragm. In addition, the pulling rod is sleeved on the outside of the protruding part through the concave part and the first buckles are connected to the second buckles by snapping, so as to achieve a reliable connection with the diaphragm body, prevent the pulling rod from falling off from the diaphragm body, and improve the connection effect of the pulling rod and the diaphragm body. Further, the first buckles and the second buckles are distributed along the circumferential direction, so that the pulling rod and the protruding part are evenly stressed. When the diaphragm pump is working, the stretching rod drives the diaphragm body to deform to change the size of the diaphragm cavity, so that the diaphragm pump sucks liquid from the inlet or discharges the liquid in the diaphragm cavity from the outlet. The three diaphragm cavities of the main diaphragm deform alternately, realizing the pumping function of the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic structural diagram of a diaphragm pump according to a preferred embodiment of the utility model.

[0031] Figure 2 This is a schematic diagram of the internal structure of a diaphragm pump according to a preferred embodiment of the utility model (the motor and part of the housing are hidden).

[0032] Figure 3 This is a schematic structural diagram of a main diaphragm and a triangular bracket according to a preferred embodiment of the utility model.

[0033] Figure 4 The figure is a schematic structural diagram of a main diaphragm according to a preferred embodiment of the utility model.

[0034] Figure 5 This is a schematic diagram of the exploded structure of the main diaphragm of a preferred embodiment of the utility model.

[0035] Figure 6 The structure of the diaphragm body of a preferred embodiment of the utility model is shown in FIG. Figure 1 .

[0036] Figure 7 The structure of the diaphragm body of a preferred embodiment of the utility model is shown in FIG. Figure 2 .

[0037] Figure 8 The structure of the stretching rod of a preferred embodiment of the utility model is shown in FIG. Figure 1 .

[0038] Fig. 9 The structure of the stretching rod of a preferred embodiment of the utility model is shown in FIG. Figure 2 .

[0039] Fig.10 It is a structural schematic diagram of a tripod bracket of a preferred embodiment of the utility model.

[0040] Fig.11 It is a structural schematic diagram of a support frame of a preferred embodiment of the utility model.

[0041] Description of reference numerals:

[0042] Main diaphragm 1

[0043] Diaphragm body 11

[0044] Diaphragm cavity 111

[0045] Raised portion 112

[0046] First buckle 113

[0047] Flange 1131

[0048] The third buckle 114

[0049] Stretching rod 12

[0050] Depression 121

[0051] Second buckle 122

[0052] Fourth buckle 123

[0053] Connecting part 124

[0054] Tripod Bracket 2

[0055] Mounting holes 21

[0056] Opening slot 22

[0057] Support frame 3

[0058] Abutment portion 31

[0059] Eccentric wheel 4

[0060] Motor 5

[0061] Import 10

[0062] Exit 20 DETAILED DESCRIPTION

[0063] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0064] like Figure 1-Figure 11 As shown, this embodiment discloses a diaphragm pump, which includes a main diaphragm 1, a support frame 3, a triangular support 2, an eccentric wheel 4 and a motor 5. The main diaphragm 1 is installed in the support frame 3, the output shaft of the motor 5 is connected to the eccentric wheel 4, the eccentric wheel 4 is connected to the triangular support 2, and the triangular support 2 is connected to the main diaphragm 1. When the diaphragm pump is working, the motor 5 drives the eccentric wheel 4 to rotate, the eccentric wheel 4 drives the triangular support 2 to vibrate, and the triangular support 2 drives the main diaphragm 1 to deform, thereby realizing the operation of the diaphragm pump, and the liquid is sucked from the inlet 10 and discharged from the outlet 20.

[0065] like Figure 3-Figure 9 As shown, the main diaphragm 1 includes a diaphragm body 11 and a stretching rod 12. The diaphragm body 11 is recessed inward to form a diaphragm cavity 111 on one side and a protrusion 112 on the other side opposite to the diaphragm cavity 111. The number of diaphragm cavities 111 and the number of protrusions 112 are both three. The protrusions 112 are arranged in a one-to-one correspondence with the stretching rod 12. One end of the stretching rod 12 has a recess 121, and the protrusion 112 is embedded in the recess 121. The protrusion 112 has a plurality of first buckles 113 distributed along the circumferential direction, and the inner wall of the recess 121 has a plurality of second buckles 122 distributed along the circumferential direction. The first buckle 113 and the second buckle 122 are arranged in a one-to-one correspondence, and the first buckle 113 is snap-connected to the second buckle 122.

[0066] like Figure 2-Figure 5As shown, in the present embodiment, the main diaphragm 1 of the diaphragm pump comprises a diaphragm body 11 and a pulling rod. The diaphragm body 11 is made of elastic material and changes the size of the diaphragm cavity 111 by deformation, and the stretching rod 12 is used to drive the diaphragm body 11 to deform. The main diaphragm 1 is set as a combination of the diaphragm body 11 and the stretching rod 12. The material of the stretching rod 12 and the diaphragm body 11 can be set to be different, thereby improving the wear resistance of the stretching rod 12. Even if the negative pressure at the front end of the diaphragm pump is too high due to some external reasons, the triangular bracket 2 strongly stretches the stretching rod 12 on the main diaphragm 1, which will cause the deformation of the diaphragm body 11. However, the deformation of the stretching rod 12 is small or even non-deformed, so it is not easy to cause damage to the stretching rod 12, thereby improving the service life of the main diaphragm 1. Moreover, the pull rod is sleeved on the outer side of the protrusion 112 through the recessed part 121 and the first buckles 113 are connected to the second buckles 122, so as to realize reliable connection with the diaphragm body 11, prevent the pull rod 12 from falling off the diaphragm body 11, and improve the connection effect between the pull rod 12 and the diaphragm body 11. Furthermore, the first buckles 113 and the second buckles 122 are distributed along the circumferential direction, so that the pull rod 12 and the protrusion 112 are evenly stressed. When the diaphragm pump is working, the pull rod 12 drives the diaphragm body 11 to deform to change the size of the diaphragm cavity 111, so that the diaphragm pump sucks liquid from the inlet 10 or discharges the liquid in the diaphragm cavity 111 from the outlet 20, and the three diaphragm cavities 111 of the main diaphragm 1 are deformed alternately, so as to realize the pumping function of the diaphragm pump.

[0067] Preferably, the diaphragm body 11 and the stretching rod 12 are injection molded.

[0068] like Figure 5-Figure 9 As shown, the first buckle 113 is a raised column, the second buckle 122 is a fixing hole, the end of the raised column has a flange 1131, the raised column is inserted into the fixing hole, and the flange 1131 is buckled on the outside of the fixing hole. A plurality of raised columns are embedded in a plurality of fixing holes, so that the raised portion 112 and the stretching rod 12 are embedded with each other, thereby improving the connection and fixing effect. The diameter of the flange 1131 is larger than the diameter of the raised column. When the flange 1131 is buckled on the outside of the fixing hole, the flange 1131 buckles the stretching rod 12 to form an anti-slip structure, thereby improving the connection effect between the stretching rod 12 and the diaphragm body 11.

[0069] In other alternative embodiments, the first buckle 113 is a fixing hole, and the second buckle 122 is a protruding column.

[0070] In other alternative embodiments, the structures of the first buckle 113 and the second buckle 122 may also be other mutually inlaid structures to improve the connection effect between the stretching rod 12 and the diaphragm body 11 .

[0071] like Figure 5-Figure 9As shown, in this embodiment, the protrusion 112 has a plurality of third buckles 114 distributed along the circumferential direction, and the recessed portion 121 has a plurality of fourth buckles 123 distributed along the circumferential direction. The third buckles 114 and the fourth buckles 123 are arranged one by one, and the third buckle 114 is snap-connected to the fourth buckle 123. The plurality of third buckles 114 are snap-connected to the fourth buckle 123, so that the stretching rod 12 is firmly connected to the diaphragm body 11, and the connection effect between the stretching rod 12 and the diaphragm body 11 is further improved.

[0072] like Figure 5-Figure 6 As shown, the third buckle 114 is located on the same straight line as the first buckle 113 along the axial direction and is located below the first buckle 113, and the fourth buckle 123 is located on the same straight line as the second buckle 122 along the axial direction and is located below the second buckle 122, which improves the connection and fixing effect and also facilitates mold making and injection molding.

[0073] like Figure 5-Figure 6 As shown, in this embodiment, the third buckle 114 is a groove, and the fourth buckle 123 is a raised undercut, which is embedded in the groove. The undercut is embedded in the groove to form an anti-slip structure, so that the stretching rod 12 is firmly connected to the diaphragm body 11, further improving the connection effect between the stretching rod 12 and the diaphragm body 11.

[0074] In other alternative embodiments, the third buckle 114 is an undercut, and the fourth buckle 123 is a groove.

[0075] In other alternative embodiments, the structures of the third buckle 114 and the fourth buckle 123 may also be other mutually inlaid structures to improve the connection effect between the stretching rod 12 and the diaphragm body 11 .

[0076] Preferably, the diaphragm body 11 is made of rubber, and the stretching rod 12 is made of plastic, so as to improve the wear resistance of the stretching rod 12 .

[0077] like Figure 8-Figure 10 As shown, the middle part of the stretching rod 12 has a connecting portion 124, and the diameter of the connecting portion 124 is smaller than the diameter of the two ends of the stretching rod 12. The triangular bracket 2 has three support arms, each of which is provided with a mounting hole 21, which is convenient for connecting with the stretching rods 12 of the three main diaphragms 1. The diameter of the end of the stretching rod 12 away from the diaphragm body 11 is larger than the inner diameter of the mounting hole 21, so that the connecting portion 124 is inserted into the mounting hole 21 to achieve the connection between the stretching rod 12 and the diaphragm body 11 without providing other fixing structures. When the triangular bracket 2 vibrates, since the diameter of the end of the stretching rod 12 away from the diaphragm body 11 is larger than the inner diameter of the mounting hole 21, the stretching rod 12 will not fall out of the mounting hole 21.

[0078] like Fig.10As shown, in this embodiment, each mounting hole 21 has an open slot 22, which facilitates the connection portion 124 to be inserted into the mounting hole 21 through the open slot 22. The inner diameter of the open slot 22 gradually decreases from the outside to the inside, forming a closed structure to prevent the stretching rod 12 from falling out of the open slot 22.

[0079] like Figure 2 and Fig.11 As shown, the support frame 3 has three receiving holes, the support frame 3 is sleeved on the main diaphragm 1, the three protrusions 112 of the main diaphragm 1 are respectively embedded in the three receiving holes, and the middle part of the support frame 3 has a protruding abutting part 31, the abutting part 31 is arranged corresponding to the middle part of the triangular bracket 2 and keeps a preset distance from the support frame 3. By providing the abutting part 31, the support frame 3 abuts against the abutting part 31 when the vibration is at the maximum amplitude, preventing the support frame 3 from contacting with the diaphragm body 11, thereby damaging the diaphragm body 11, and improving the service life of the diaphragm body 11.

[0080] In this embodiment, the material of the stretching rod 12 is the same as that of the triangular bracket 2 , thereby improving the wear resistance between the stretching rod 12 and the triangular bracket 2 .

[0081] Preferably, the material of the stretch rod 12 and the material of the triangular bracket 2 are both polyoxymethylene (POM), which prolongs the service life of the main diaphragm 1 .

[0082] In the description of this article, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0083] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A diaphragm pump, characterized in that: It includes a main diaphragm, which includes a diaphragm body and a stretching rod. The diaphragm body is recessed inward to form a diaphragm cavity on one side and a protrusion on the other side opposite to the diaphragm cavity. The number of the diaphragm cavities and the number of the protrusions are both three. The protrusions are arranged in a one-to-one correspondence with the stretching rod. One end of the stretching rod has a recessed portion, and the protrusion is embedded in the recessed portion. The protrusion is circumferentially distributed with a plurality of first buckles, and the inner wall of the recessed portion is circumferentially distributed with a plurality of second buckles. The first buckle is arranged in a one-to-one correspondence with the second buckle, and the first buckle is snap-connected to the second buckle.

2. The diaphragm pump according to claim 1, characterized in that The first buckle is a raised column, the second buckle is a fixing hole, the end of the raised column has a flange, the raised column is passed through the fixing hole, and the flange is buckled on the outside of the fixing hole.

3. The diaphragm pump according to claim 2, characterized in that The raised portion is provided with a plurality of third buckles distributed along the circumferential direction, and the recessed portion is provided with a plurality of fourth buckles distributed along the circumferential direction. The third buckles are arranged in a one-to-one correspondence with the fourth buckles, and the third buckles are snap-connected to the fourth buckles.

4. The diaphragm pump according to claim 3, characterized in that: The third buckle is located on the same straight line as the first buckle along the axial direction and is located below the first buckle, and the fourth buckle is located on the same straight line as the second buckle along the axial direction and is located below the second buckle.

5. The diaphragm pump according to claim 4, characterized in that The third buckle is a groove, and the fourth buckle is a raised undercut, and the undercut is embedded in the groove.

6. The diaphragm pump according to claim 1, characterized in that The material of the diaphragm body is rubber, and the material of the stretching rod is plastic.

7. The diaphragm pump according to claim 1, characterized in that The middle part of the stretching rod has a connecting part, and the diameter of the connecting part is smaller than the diameters of the two ends of the stretching rod; The diaphragm pump further comprises a triangular bracket, wherein the triangular bracket has three support arms, each of the support arms is provided with a mounting hole, and the connecting portion is passed through the mounting hole.

8. The diaphragm pump according to claim 7, characterized in that Each of the mounting holes has an open slot, and the inner diameter of the open slot gradually decreases from the outer side to the inner side.

9. The diaphragm pump according to claim 7, characterized in that: The diaphragm pump also includes a support frame, which is sleeved on the main diaphragm. The middle part of the support frame has a raised abutment portion, which is arranged corresponding to the middle part of the triangular bracket and keeps a preset distance from the support frame.

10. The diaphragm pump according to claim 9, characterized in that The material of the stretching rod is the same as that of the triangular bracket.

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