Electromagnetic diaphragm pump

Abstract

The invention relates to an electromagnetic diaphragm pump, comprising a main body, a first air chamber component, a second air chamber component, an oscillator component, a first coil component and a second coil component; the magnetic rod of the oscillator component comprises a frame body formed by integral injection molding, and one end of the frame body comprises a positioning surface, a positioning step and a fixing column in sequence; a leather cup positioning clamp is installed on the positioning surface, a leather cup pressure plate is fixed on the positioning step, and the leather cup is fixed between the leather cup positioning clamp and the leather cup pressure plate and installed in a mounting hole. After the frame body is replaced as a whole by an injection molding process, the molding cycle is short, the production efficiency is high, and automation is easy to realize, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to an electromagnetic diaphragm pump and a method for manufacturing the same, and more particularly to an electromagnetic diaphragm pump used for air suction and exhaust in indoor air mattresses and air mattresses, oxygenation in fish tanks and household septic tanks, or sampling of inspection gases in pollution monitoring. Background Art

[0002] The electromagnetic vibrating diaphragm pump, also known as the electromagnetic diaphragm pump, has a structure including a diaphragm made of rubber, the diaphragm is fixed to both ends of an oscillator having a magnet, and the electromagnet is arranged in a manner facing the magnet on the oscillator. The oscillator and the electromagnet are surrounded by an outer shell, the pump shell covers the outer diaphragm, and the pump shell includes a compression chamber adjacent to the diaphragm, a suction chamber arranged adjacent to the compression chamber, and a discharge chamber arranged adjacent to the compression chamber, the suction chamber is controlled by a suction valve inserted in a one-way manner, and the discharge chamber is controlled by a discharge valve inserted in a one-way manner. In addition, the oscillator vibrates according to the change in polarity of the electromagnet, and the change in polarity of the electromagnet changes according to the phase change of the AC power supply applied to the electromagnet, so that the diaphragm vibrates, thereby repeatedly sucking and discharging a fluid such as air.

[0003] Taking Chinese patent application 201310525719.2 as an example, in the prior art, the diaphragm of the oscillator is installed on the screw component at the end of the oscillator, and the diaphragm is fixed by the plate-shaped clamping components at both ends. The diaphragm is made of materials such as rubber parts and has a through hole in its center; the main body of the oscillator is made of plastic material and processed by injection molding, and the screw component is a metal material. When the oscillator is produced, it is integrally injection-molded and fixed in the plastic body, that is, the insert injection molding process is adopted. Insert molding refers to the molding method of inserting a pre-prepared insert of a different material into the mold and then injecting resin, and the molten material is bonded and solidified with the insert to form an integrated product. Therefore, the structure of the screw component is formed in the through hole at the end of the oscillator. However, when using the above-mentioned electromagnetic vibration diaphragm pump, it is found that the diaphragm is very easy to be damaged due to repeated movement and fluid leakage occurs. When the diaphragm is damaged, the oscillator will also collide with the electromagnet, thereby causing safety hazards. Summary of the invention

[0004] To this end, the present invention provides an improved electromagnetic diaphragm pump for overcoming the problem of easy breakage of the diaphragm in the prior art. First, the applicant discovered the reasons why the diaphragm in the prior art is easy to break: First, in order to prevent fluid leakage or to prevent the diaphragm from falling out, the current products often over-clamp the clamps on both sides of the diaphragm when clamping the diaphragm. Over-clamping the diaphragm will cause the diaphragm to break when it moves repeatedly; second, the current products install the clamps on both sides of the diaphragm as a unit on the screw component at the end of the oscillator, but do not pay attention to whether the diaphragm is in a flat and stress-free state in the initial position after installation. Sometimes, the diaphragm of the current product is in a bent and stretched state after being installed in the initial position. But this is not easy to be found, so when in motion, it will be over-stretched at the extreme position on one side; third, in the current product, no attention is paid to the influence of the screw component on the movement of the oscillator, because the screw component is injected into the oscillator as a whole during insert molding. Therefore, the oscillator containing the screw cannot be guaranteed in terms of dimensional accuracy and concentricity accuracy with the mounting hole. In addition, since the screw is a metal component, it inevitably destroys the uniform arrangement of the magnetic lines of force generated by the electromagnets on both sides, and due to the accumulation of errors caused by the installation of internal components of the product, it is difficult to judge and solve this interference with the arrangement of the magnetic lines of force.

[0005] Therefore, the applicant proposes an electromagnetic diaphragm pump, which is consistent with the prior art, and includes a main body, a first air chamber assembly, a second air chamber assembly, an oscillator assembly, a first coil assembly and a second coil assembly; a main body, which includes an inner cavity and mounting holes at both ends; an oscillator assembly, which is arranged in the inner cavity, and the two ends of the oscillator assembly are respectively movably fixed in the mounting holes; the first coil assembly and the second coil assembly are installed in the inner cavity and are located on both sides of the oscillator assembly, and the oscillator assembly, driven by the first coil assembly and the second coil assembly, performs reciprocating linear motion between the first air chamber assembly and the second air chamber assembly and drives the first air chamber assembly and the second air chamber assembly; a magnetic rod, which includes a frame body and magnetic pole blocks installed on both sides of the frame body and arranged corresponding to the first coil assembly and the second coil assembly respectively.

[0006] Different from the prior art, the magnetic rod includes a frame body formed by integral injection molding, and one end of the frame body includes a positioning surface, a positioning step and a fixing column in sequence, that is, the positioning surface, the positioning step and the fixing column are also made of plastic materials, which are formed on the frame body during injection molding. When the frame body as a whole is replaced by the injection molding process, the molding cycle is short, the production efficiency is high, and automation is easy to achieve, and the production efficiency is greatly improved; the size is precise, and the two structures of the positioning surface and the positioning step can be accurately formed, providing a reference for the high-precision assembly of the leather cup or diaphragm. At the same time, the frame body as a whole is made of plastic material, which will not interfere with the uniformity of the magnetic lines of force generated by the electromagnets on both sides, which is also conducive to the reliable operation of the oscillator assembly.

[0007] On this basis, the cup positioning splint is installed on the positioning surface. The cup positioning splint of suitable thickness can be selected according to the thickness of the cup and the length of the positioning step to ensure that the cup is in a flat state at the initial position when it is finally installed in the main body to prevent excessive stretching at the extreme position of movement. The cup positioning splint can be flexibly selected according to the cups of different thicknesses as an adjustment structure. In particular, when supplying special fluid components, it may be necessary to select the corresponding cup. At this time, the cup positioning splint should be determined and replaced according to the thickness of the cup.

[0008] The cup pressure plate is fixed on the positioning step, so the position of the cup pressure plate is determined by the positioning step of the frame body, which can ensure the installation size of the oscillator assembly as a whole.

[0009] The leather cup is fixed between the leather cup positioning clamp and the leather cup pressure plate and installed in the mounting hole; the two ends of the frame body are symmetrical structures, and the leather cup clamping structure on the other side will not be repeated.

[0010] In addition, it can also include a nut and a gasket, the nut is matched with the fixing column thread, and the nut and the gasket lock the leather cup pressure plate on the end face of the positioning step. No matter how much the locking pressure of the nut on the leather cup pressure plate is, it will not be further transmitted to the leather cup. The pressure on the leather cup is only determined by the positioning step of the frame body and the thickness of the leather cup positioning clamp, which solves the problem of damaging the leather cup by over-tightening the leather cup pressure plate during assembly.

[0011] The oscillator assembly also includes: a leather cup positioning clamping plate with a guide column on one surface and a guide sheet on the other surface; a positioning groove on the positioning surface, which corresponds to the guide sheet; and through holes on the leather cup and the leather cup pressure plate, which correspond to the guide column. Due to the provision of structures such as the guide column, the guide sheet and the positioning groove, the installation effect of the oscillator assembly is greatly improved. At the same time, the leather cup positioning clamping plate of suitable thickness is selected according to the thickness of the leather cup and the length of the positioning step, thereby improving the overall installation accuracy of the electromagnetic diaphragm pump, the oscillator assembly operates under reliable installation accuracy, and the risk of leather cup damage is also reduced.

[0012] Other beneficial effects of the present invention will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional view of an electromagnetic diaphragm pump according to an embodiment of the present invention;

[0014] Figure 2 This is a front view of an electromagnetic diaphragm pump according to an embodiment of the present invention;

[0015] Figure 3 For the present invention Figure 2 HH cross-sectional view;

[0016] Figure 4A top view of an electromagnetic diaphragm pump according to an embodiment of the present invention;

[0017] Figure 5 For the present invention Figure 4 EE cross-sectional view;

[0018] Figure 6 It is a side view of an electromagnetic diaphragm pump according to an embodiment of the present invention;

[0019] Figure 7 For the present invention Figure 6 DD cross-sectional view;

[0020] Figure 8 A schematic diagram of a magnetic bar according to an embodiment of the present invention;

[0021] Fig. 9 A cross-sectional view of a magnetic bar according to an embodiment of the present invention;

[0022] Fig.10 This is an exploded view of an electromagnetic diaphragm pump according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 10-main body; 11-air inlet; 12-inner cavity; 13-side cover; 14-mounting hole; 20-first air chamber assembly; 21-inner air inlet chamber; 22-air outlet chamber; 23-air inlet check valve; 24-air outlet check valve; 25-air outlet nozzle; 26-air chamber cover; 27-air storage cavity; 28-connecting flow channel; 20'-second air chamber assembly; 30-oscillator assembly; 31-leather cup pressure plate; 32-leather cup; 33-leather cup positioning clamp; 33 1-guide column; 332-guide plate; 34-magnetic rod; 341-fixed column; 342-positioning step; 343-positioning surface; 344-N level; 345-S level; 346-positioning groove; 40-air storage chamber; 41-air outlet; 42-first connecting port; 43-second connecting port; 51-first coil assembly; 52-second coil assembly; 53-magnetic conductor; A1-first positioning reference; A2-second positioning reference; A3-gap. DETAILED DESCRIPTION

[0025] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0027] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Figure 1 The electromagnetic diaphragm pump (abbreviated as pump in the following description) according to an embodiment of the present disclosure is shown in a three-dimensional illustration. The electromagnetic diaphragm pump includes a main body 10, a first air chamber component 20, a second air chamber component 20', an oscillator component 30, a first coil component 51 and a second coil component 52; Figure 2-10 It can be seen that, similar to the prior art, the first air chamber assembly 20 is arranged on one side of the pump body, separated from the pump body by the leather cup 32, and includes an air inlet chamber 21 and an air outlet chamber 22. An air inlet check valve 23 is arranged in the air inlet chamber 21, and an air outlet check valve 24 is arranged in the air outlet chamber 22. Under the movement of the leather cup 32, when the volume of the air storage cavity 27 of the first air chamber assembly 20 increases, the air inlet check valve 23 is opened to allow the fluid to be sucked into the air storage cavity 27, and at this time, the air outlet check valve 24 is closed; when the volume of the air storage cavity 27 decreases, the air inlet check valve 23 is closed, and the fluid in the air storage cavity 27 is discharged through the air outlet check valve 24.

[0030] The electromagnetic diaphragm pump includes an oscillator assembly, which has a magnetic rod 34. The magnetic rod 34 includes two groups of permanent magnets arranged on a plate-like frame body. The frame body of the oscillator assembly is made of non-magnetic material. In this embodiment, it is formed by injection molding in one go. The fixing column 341, the positioning step 342, and the positioning surface 343 are all formed on the frame body during the injection molding stage, and a symmetrical structure is formed along the center axis. The disc-shaped leather cup 32 is fixed and installed at a position adjacent to the positioning steps 342 and the positioning surface 343 at both ends. The leather cup 32 is clamped by the leather cup positioning clamp 33 and the leather cup pressure plate 31. The three form an airtight seal and are fixed on the mounting hole 14. The leather cup pressure plate 31 can be tightened from the outside to the inside using washers and nuts to lock the leather cup pressure plate 31 on the end face of the positioning step 342, and the oscillator assembly as a whole is positioned in the main body 10.

[0031] The leather cup 32 can be made of EPDM or fluororubber. In certain cases where specific fluid supply is required, the material can also be selected according to the fluid requirements. The leather cup pressure plate 31 and the leather cup positioning clamp 33 are made of plastic.

[0032] The first coil assembly 51 and the second coil assembly 52 are both coil-formed electromagnets, and are mounted on the magnetizer 53 to drive the permanent magnet of the oscillator assembly. The permanent magnet is plate-shaped and made of ferromagnetic materials or rare earth materials, etc. and is magnetized separately, with an N pole or an S pole on its surface. The side surfaces of the electromagnets of the first coil assembly 51 and the second coil assembly 52 form an N pole or an S pole. When an alternating current is applied to the electromagnet, the center of the side surface of any electromagnet is a north pole, while the other has a south pole at the center of its side surface, and changes alternately according to the phase change of the AC generator, generating an attractive force and a repulsive force between the permanent magnets arranged in the oscillator assembly, thereby allowing the oscillator assembly to move in an axial reciprocating manner, so that the leather cup 32 causes the first air chamber assembly 20 and the second air chamber assembly 20' to periodically inhale and discharge fluid. These permanent magnets can be tightly fixed to the frame body, for example, by integrally molding to the resin structure of the frame body.

[0033] In this embodiment, the magnetic rod includes a frame body formed by integral injection molding, and one end of the frame body includes a positioning surface, a positioning step and a fixing column in sequence, that is, the positioning surface, the positioning step and the fixing column are also made of plastic materials, which are formed on the frame body during injection molding. The leather cup positioning clamp 33 is installed on the positioning surface 343, the leather cup pressure plate 31 is fixed on the positioning step 342, and the leather cup 32 is fixed between the leather cup positioning clamp 33 and the leather cup pressure plate 31 and installed in the mounting hole 14; the two ends of the frame body are symmetrical structures.

[0034] Compared with the prior art Chinese patent application 201310525719.2, when the frame body is replaced by the injection molding process, the molding cycle is short, the production efficiency is high, and it is easy to realize automation, and the production efficiency is greatly improved; the size is accurate, and the positioning surface and positioning step can be accurately formed to provide a reference for the high-precision assembly of the leather cup or diaphragm. At the same time, the frame body is made of plastic material as a whole, which will not interfere with the uniformity of the magnetic lines of force generated by the electromagnets on both sides, which is also conducive to the reliable operation of the oscillator assembly.

[0035] On this basis, the cup positioning splint is installed on the positioning surface. The cup positioning splint of suitable thickness can be selected according to the thickness of the cup and the length of the positioning step to ensure that the cup is in a flat state at the initial position when it is finally installed in the main body to prevent excessive stretching at the extreme position of movement. As an adjustment structure, the cup positioning splint can be flexibly selected according to the cups of different thicknesses. In particular, when supplying special fluids, it may be necessary to select the corresponding cup. At this time, the cup positioning splint should be determined and replaced according to the thickness of the cup.

[0036] When designing the magnetic rod, the first thing to do is to determine the first positioning reference A1 of the end face of the positioning step 34, which determines the final position of the magnetic rod and the main body after the leather cup is fixed between the leather cup positioning clamp and the leather cup pressure plate and installed in the mounting hole. Then, the second positioning reference A2 at the positioning surface 343 must be determined, which provides a positioning basis for the installation of the leather cup 32. The bowl pressure plate is fixed on the positioning step. Therefore, the position of the leather cup pressure plate is determined by the positioning step of the frame body, which can ensure the installation size of the oscillator assembly as a whole, and the leather cup can also be accurately installed in the gap A3 between the leather cup positioning clamp and the leather cup pressure plate 31.

[0037] Furthermore, the oscillator assembly 30 also includes: a leather cup positioning clamp 33 having a guide column 331 on one surface and a guide sheet 332 on the other surface; a positioning surface 343 having a positioning groove 346 corresponding to the guide sheet 332; through holes are provided on both the leather cup 32 and the leather cup pressure plate 31 and corresponding to the guide column 331; a leather cup positioning clamp 33 of suitable thickness is selected according to the thickness of the leather cup 32 and the length of the positioning step 342.

[0038] Due to the provision of structures such as guide columns, guide plates and positioning grooves, the installation effect of the oscillator assembly is greatly improved. At the same time, a leather cup positioning splint of suitable thickness is selected according to the thickness of the leather cup and the length of the positioning step, thereby improving the overall installation accuracy of the electromagnetic diaphragm pump. The oscillator assembly operates under reliable installation accuracy and reduces the risk of leather cup damage.

[0039] In addition, a nut and a washer may also be included, the nut and the fixing column thread cooperate, and the nut and the washer lock the leather cup pressure plate on the end surface of the positioning step. No matter how much the locking pressure of the nut on the leather cup pressure plate is, it will not be further transmitted to the leather cup. The pressure on the leather cup is only determined by the positioning step of the frame body and the thickness of the leather cup pressure plate 31, which solves the problem of damaging the leather cup due to over-tightening of the leather cup pressure plate during assembly.

[0040] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic diaphragm pump, comprising a main body (10), a first air chamber component (20), a second air chamber component (20'), an oscillator component (30), a first coil component (51) and a second coil component (52); A main body (10) comprising an inner cavity (12) and mounting holes (14) at both ends; An oscillator assembly (30) is disposed in the inner cavity (12), and two ends of the oscillator assembly (30) are movably fixed to the mounting holes (14); The first coil assembly (51) and the second coil assembly (52) are installed in the inner cavity (12) and are located on both sides of the oscillator assembly (30); the oscillator assembly (30) is driven by the first coil assembly (51) and the second coil assembly (52) to perform reciprocating linear motion between the first air chamber assembly (20) and the second air chamber assembly (20') and drive the first air chamber assembly (20) and the second air chamber assembly (20') to transport fluid; Features: The oscillator assembly (30) comprises a magnetic rod (34), the magnetic rod (34) comprising a frame body formed by integral injection molding and magnetic pole blocks installed on both sides of the frame body and respectively arranged corresponding to the first coil assembly (51) and the second coil assembly (52); the two ends of the frame body are symmetrical structures, and one end of the frame body comprises a positioning surface (343), a positioning step (342) and a fixing column (341) in sequence; The leather cup positioning clamp (33) is installed on the positioning surface (343), the leather cup pressure plate (31) is pressed and fixed on the positioning step (342), and the leather cup (32) is fixed between the leather cup positioning clamp (33) and the leather cup pressure plate (31) and installed in the mounting hole (14); wherein the leather cup positioning clamp (33) of suitable thickness is selected according to the thickness of the leather cup (32) and the length of the positioning step (342); The oscillator assembly (30) further comprises: a leather cup positioning clamp (33) having a guide column (331) on one surface and a guide sheet (332) on the other surface; a positioning surface (343) having a positioning groove (346), the positioning groove (346) corresponding to the guide sheet (332); through holes are provided on the leather cup (32) and the leather cup pressure plate (31) and correspond to the guide column (331); The locking structure is used to press and fix the leather cup pressure plate (31) on the positioning step (342); the nut and the gasket are threadedly matched with the fixing column (341), and the nut locks the leather cup pressure plate (31) on the end surface of the positioning step (342) through the gasket.

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