Diaphragm water pump

Abstract

The utility model relates to a diaphragm water pump, it relates to water pump technical field, it contains pump body, two check valve who links to fluid inlet and fluid outlet, driving mechanism, cam mechanism and connecting mechanism, the cam mechanism is equipped with the output shaft one end of driving mechanism, the connecting mechanism is located between the cam mechanism and the check valve, and under the drive of cam mechanism, along linear reciprocating motion, simultaneously drive the check valve produces elastic deformation, adopt cam mechanism and connecting rod mechanism cooperation, realize strong drive check valve opening and closing, reach prevent check valve adhesion etc.

Description

Technical Field

[0001] This invention relates to the field of water pump technology, and more specifically to a diaphragm water pump. Background Technology

[0002] Currently, ordinary diaphragm water pumps are widely used in household appliances, medical applications, and other daily life fields due to their small size and low cost. They work by using a mechanical device to make the diaphragm inside the pump reciprocate, thereby compressing and stretching the air in the pump chamber (fixed volume). Under the action of a one-way valve, positive pressure is created at the drain outlet, and a vacuum is created at the inlet, thus generating a pressure difference with the external atmospheric pressure. Under the action of this pressure difference, water is forced into the inlet and then discharged from the drain outlet. Driven by the kinetic energy transmitted by the motor, water is continuously drawn in and discharged, forming a relatively stable flow rate.

[0003] However, the traditional check valves currently used in diaphragm pumps primarily open or close the valve disc through fluid pressure, and their structure is simple. When used for extended periods with viscous fluids containing impurities, these impurities and other viscous substances will adhere to the valve disc, causing the check valve to become stuck. Therefore, it is unsuitable for long-term use with viscous fluids containing impurities. Thus, improvements are urgently needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a diaphragm water pump that has the advantages of wide applicability and long service life.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A diaphragm water pump includes: a pump body, two one-way valves connected to a fluid inlet and a fluid outlet, a drive mechanism, a cam mechanism, and a connecting mechanism; the cam mechanism is mounted on one end of the output shaft of the drive mechanism; the connecting mechanism is located between the cam mechanism and the one-way valves, and reciprocates along a straight line under the drive of the cam mechanism, while simultaneously causing the one-way valves to undergo elastic deformation.

[0007] The present invention further provides that the pump body includes: a housing, a diaphragm disposed inside the housing, and a piston mechanism assembled at the output end of the drive mechanism; the diaphragm and the housing are sealed together to form a third fluid chamber, and the housing is provided with a first fluid chamber and a second fluid chamber respectively connected to two one-way valves, and the third fluid chamber is connected between the first fluid chamber and the second fluid chamber.

[0008] The present invention further includes the following: the driving mechanism includes a motor mounted on one side of the housing and an eccentric wheel located at the output end of the motor; the piston mechanism includes a piston rod sleeved on the eccentric wheel and a movable pressure plate located at the end of the piston rod and connected to the diaphragm; under the action of the driving mechanism, the piston rod drives the diaphragm to undergo elastic deformation through the movable pressure plate.

[0009] The invention further comprises: the cam mechanism being a first cam that rotates synchronously with the eccentric wheel; the first cam having a groove along its outer edge; the connecting mechanism comprising: a drive link connected at both ends to one-way valves on both sides; and a fixed shaft disposed on the drive link, the fixed shaft being slidably fitted into the groove on the first cam, so as to drive the drive link to perform linear reciprocating motion when the first cam rotates.

[0010] The present invention further comprises a second cam that rotates synchronously with the eccentric wheel; the connecting mechanism includes: a movable seat disposed on one side of the one-way valve, a ball movably mounted in the movable seat and abutting against the second cam, and a return spring sleeved on the valve core of the one-way valve; the valve core performs linear reciprocating motion under the driving force of the second cam and the restoring force of the return spring.

[0011] The present invention further includes: a fixed bracket symmetrically disposed on the side walls on both sides of the fixed bracket; the first fluid chamber and the second fluid chamber are respectively opened in the two side walls; the fluid inlet and the fluid outlet are respectively opened on the outside of the side walls for communicating with the first fluid chamber and the second fluid chamber.

[0012] The present invention further includes a lower end cover disposed at the bottom of the fixed bracket, the diaphragm being assembled between the fixed bracket and the lower end cover, and the lower end cover being recessed to form the third fluid chamber.

[0013] The present invention further provides that the side wall near the lower end cover has a first through hole communicating with the first fluid chamber or the second fluid chamber, and the lower end cover has a second through hole that cooperates with the first through hole, and the second through hole communicates with the third fluid chamber.

[0014] In a further embodiment of the present invention, the fixing bracket and the side wall are integrally formed or assembled separately.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0016] 1. In this invention, a cam mechanism is driven to rotate by a drive mechanism, causing the connecting mechanism to move repeatedly along a straight line. A one-way valve is connected to the end of the connecting mechanism, thereby driving the one-way valve to open or close. This solution uses a cam mechanism and a linkage mechanism in combination to achieve a powerful drive for opening and closing the one-way valve, preventing issues such as valve sticking. It is applicable to fluids of various properties, has a wide range of applications, and a long service life.

[0017] 2. In this invention, the entire system is driven by a single drive mechanism, which moves the piston mechanism and the cam mechanism, simultaneously achieving the powerful opening and closing of the compression and stretching of the third fluid chamber and the two one-way valves. The design is reasonable and the structure ingenious, which helps control costs. Furthermore, the first and second fluid chambers are both located inside the side wall, and the third fluid chamber is formed by the recess of the lower end cover. The overall space utilization is reasonable, and the structure is compact, maximizing the saving of internal pump space. This makes the diaphragm pump small in size and widely applicable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 yes Figure 2 The cross-sectional view at point AA shows that the connecting mechanism and cam mechanism have been hidden.

[0022] Figure 4 This is an exploded view of Embodiment 1 of the present invention;

[0023] Figure 5 This is another exploded view of Embodiment 1 of the present invention;

[0024] Figure 6 This is a side view of Embodiment 2 of the present invention;

[0025] Figure 7 yes Figure 6 Cross-sectional view at point BB.

[0026] Explanation of reference numerals in the attached drawings: 1. Pump body; 01. Fluid inlet; 02. Fluid outlet; 2. Check valve; 21. Valve core; 3. Drive mechanism; 31. Motor; 32. Eccentric wheel; 4. Cam mechanism; 41. First cam; 42. Slide groove; 43. Second cam; 5. Connecting mechanism; 51. Drive rod; 52. Fixed shaft; 53. Movable seat; 54. Ball bearing; 55. Return spring; 10. Housing; 11. Diaphragm; 110. Sealing ring; 12. Piston mechanism; 121. Piston rod; 122. Movable pressure plate; 03. Third fluid chamber; 011. First fluid chamber; 021. Second fluid chamber; 101. Fixed bracket; 102. Side wall; 103. Lower end cover; 1021. First through hole; 1031. Second through hole. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0029] Example 1: This example relates to a diaphragm water pump, such as... Figure 1-5 As shown, the system includes: a pump body 1, two one-way valves 2 connecting a fluid inlet 01 and a fluid outlet 02, a drive mechanism 3, a cam mechanism 4, and a connecting mechanism 5. The cam mechanism 4 is mounted on one end of the output shaft of the drive mechanism 3. The connecting mechanism 5 is located between the cam mechanism 4 and the one-way valves 2. When the drive mechanism 3 drives the cam mechanism 4 to rotate, the connecting mechanism 5 reciprocates along a straight line under the action of the cam mechanism 4, simultaneously causing the one-way valves 2 on both sides to undergo elastic deformation, thereby achieving a powerful drive to open and close the one-way valves 2, thus preventing the one-way valves 2 from sticking together. It is suitable for fluids of various properties, has a wide range of applications, and a long service life.

[0030] like Figure 2-4 As shown, the pump body 1 includes: a housing 10, a diaphragm 11 disposed inside the housing 10; and a piston mechanism 12 assembled at the output end of the drive mechanism 3; combined with Figure 3 and Figure 4 As shown, the diaphragm 11 and the housing 10 are sealed together to form a third fluid chamber 03. The piston mechanism 12 is driven by the drive mechanism 3 to move the diaphragm 11 in a reciprocating linear motion, thereby compressing or stretching the third fluid chamber 03, thus pumping fluid in.

[0031] Specifically, such as Figure 5As shown, the drive mechanism 3 includes a motor 31 mounted on one side of the housing 10 and an eccentric wheel 32 located at the output end of the motor 31. The piston mechanism 12 includes a piston connecting rod 121 and a movable pressure plate 122. The movable connecting rod is rotatably mounted on the eccentric wheel 32 via bearings and can move up and down with the rotation of the eccentric wheel 32. One end of the movable pressure plate 122 is fixedly connected to the end of the movable connecting rod, and the other end is detachably mounted on the diaphragm 11. During operation, the motor 31 drives the eccentric wheel 32 to rotate, which in turn drives the movable connecting rod, the movable pressure plate 122, and the diaphragm 11 to reciprocate up and down, causing the diaphragm 11 to undergo elastic deformation, thereby changing the volume of the third fluid chamber 03. Since the movable pressure plate 122 and the diaphragm 11 are detachably mounted, the diaphragm 11 can be replaced according to its usage, further improving the product's service life.

[0032] In this embodiment, as Figure 4 As shown, the cam mechanism 4 is a first cam 41 that is fixedly engaged with the eccentric wheel 32 and rotates synchronously. The first cam 41 has a groove 42 along its outer edge.

[0033] The connecting mechanism 5 includes: a drive link 51 with both ends connected to the one-way valves 2 on both sides; and a fixed shaft 52 rotatably mounted on the drive link 51, while the fixed shaft 52 is slidably mounted in the groove 42 on the first cam 41. To reduce friction and ensure smooth operation, a bearing is also provided between the fixed shaft 52 and the drive link 51. Driven by the motor 31, the first cam 41 rotates synchronously with the eccentric wheel 32. At this time, the drive link 51 restricts the direction of the fixed shaft 52, causing the fixed shaft 52 to reciprocate linearly along the groove 42, while simultaneously driving the drive link 51 to control the one-way valve 2 to open or close. In this embodiment, there is one drive link 51, and the fixed shaft 52 is located along the length of the drive link 51, dividing the drive link 51 into two parts. Each part of the drive link 51 is connected between the one-way valve 2 and the fixed shaft 52. The entire system is driven by a single drive mechanism 3, which simultaneously drives the piston mechanism 12, the cam mechanism 4, and the connecting mechanism 5 in two directions. This achieves the powerful opening and closing of the compression and stretching of the third fluid chamber 03 and the two one-way valves 2. The design is reasonable and the structure is ingenious, maximizing space utilization, resource utilization, and applicability.

[0034] To further reduce product size and simplify the overall structure, this embodiment further includes the following features: Figure 2 and Figure 3 As shown, the housing 10 is provided with a first fluid chamber 011 and a second fluid chamber 021 respectively connected to two one-way valves 2, and a third fluid chamber 03 is connected between the first fluid chamber 011 and the second fluid chamber 021.

[0035] like Figure 3-5 As shown, the housing 10 includes: a fixed bracket 101, and side walls 102 symmetrically arranged on both sides of the fixed bracket 101; the first fluid chamber 011 and the second fluid chamber 021 are respectively opened in the two side walls 102; the fluid inlet 01 and the fluid outlet 02 are respectively opened on the outside of the side walls 102 for communicating with the first fluid chamber 011 and the second fluid chamber 021. One-way valves 2 are located on the inside of the side walls 102 corresponding to the fluid inlet 01 and the fluid outlet 02, and are used to open or close the first fluid chamber 011 and the second fluid chamber 021 under the action of the connecting mechanism 5. In use, fluid enters from the fluid inlet 01, enters the first fluid chamber 011 through the one-way valve 2, then passes through the third fluid chamber 03 and the second fluid chamber 021, and is discharged to the fluid outlet 02 through the one-way valve 2.

[0036] During manufacturing, the fixed bracket 101 and the side wall 102 can be integrally formed, which helps to reduce assembly complexity; or the fixed bracket 101 and the side wall 102 can be assembled separately, which facilitates production demolding. Manufacturers can choose according to actual production conditions during actual manufacturing.

[0037] like Figure 4 and Figure 5 As shown, the housing 10 further includes a lower end cover 103 disposed at the bottom of the fixed bracket 101, the lower end cover 103 being recessed to form the third fluid chamber 03. The diaphragm 11 is assembled between the fixed bracket 101 and the lower end cover 103.

[0038] Combination Figure 3 and Figure 5 As shown, the side wall 102 near the lower end cover 103 has a first through hole 1021 communicating with the first fluid chamber 011 or the second fluid chamber 021. The lower end cover 103 has a second through hole 1031 that mates with the first through hole 1021, and the second through hole 1031 communicates with the third fluid chamber 03. In this embodiment, by placing the first fluid chamber 011 and the second fluid chamber 021 inside the side wall 102 and placing the third fluid chamber 03 inside the lower end cover 103, the internal space of the pump can be preserved to the greatest extent, which is beneficial to minimizing the volume of the diaphragm 11 water pump and making it widely applicable to medical, small household appliance and other product categories. On the other hand, placing the fluid chamber inside the side wall 102 reduces the use of fluid communication components and effectively reduces water leakage inside the pump.

[0039] like Figure 5As shown, the lower end cover 103 and the fixed bracket 101 are provided with interlocking sealing protrusions. The diaphragm 11 is clamped between the fixed bracket 101 and the lower end cover 103, and ear-shaped sealing rings 110 extend from both sides of the diaphragm 11. The sealing rings 110 are positioned between the first through hole 1021 and the second through hole 1031. By integrating the sealing rings 110 with the diaphragm 11, installation is convenient, and displacement of the diaphragm 11 during use is prevented. Therefore, this structure can effectively improve the sealing performance of the pump body.

[0040] Example 2: This example relates to a diaphragm 11 water pump, such as... Figure 6 and Figure 7 As shown, the system includes: a pump body 1, two one-way valves 2 connecting a fluid inlet 01 and a fluid outlet 02, a drive mechanism 3, a cam mechanism 4, and a connecting mechanism 5. The cam mechanism 4 is mounted on one end of the output shaft of the drive mechanism 3. The connecting mechanism 5 is located between the cam mechanism 4 and the one-way valves 2. When the drive mechanism 3 drives the cam mechanism 4 to rotate, the connecting mechanism 5 reciprocates along a straight line under the action of the cam mechanism 4, simultaneously causing the one-way valves 2 on both sides to undergo elastic deformation, thereby achieving a powerful drive to open and close the one-way valves 2, thus preventing the one-way valves 2 from sticking together. It is suitable for fluids of various properties, has a wide range of applications, and a long service life.

[0041] The difference between this embodiment and embodiment one is that, in this embodiment, as... Figure 7 As shown, the cam mechanism 4 is a second cam 43 that rotates synchronously with the eccentric wheel 32;

[0042] The connecting mechanism 5 includes: a movable seat 53 disposed on one side of the one-way valve 2; a ball bearing 54 movably mounted in the movable seat 53 and abutting against the side wall 102 of the second cam 43; and a return spring 55 sleeved on the valve core 21 of the one-way valve 2. The two ends of the return spring 55 abut against the inner side of the side wall 102 and the end of the valve core 21, respectively. The valve core 21 performs linear reciprocating motion under the drive of the second cam 43 and the restoring force of the return spring 55, thereby sealing or unsealing the fluid inlet 01 or the fluid outlet 02.

[0043] When the drive mechanism 3 drives the second cam 43 to rotate synchronously with the eccentric wheel 32, and the second cam 43 moves from the minimum radius to the maximum radius relative to the ball 54, the ball 54 is subjected to the maximum thrust of the second cam 43. Therefore, the ball 54 retracts relative to the movable seat 53. At this time, the return spring 55 is compressed, and the valve core 21 moves toward the fluid inlet 01 / fluid outlet 02 side, thereby closing the one-way valve 2. When the second cam 43 moves from the maximum radius to the minimum radius relative to the ball 54, the ball 54 is subjected to the minimum thrust of the second cam 43. Therefore, under the action of the return spring 55, the ball 54 extends relative to the movable seat 53, and the valve core 21 moves toward the side away from the fluid inlet 01 / fluid outlet 02, thereby opening the one-way valve 2.

[0044] Compared to Embodiment 1, the connecting mechanism 5 in this embodiment has a simpler structure, is more flexible in use, and has a relatively lower overall cost. Similarly, through a single driving mechanism 3, the piston mechanism 12, cam mechanism 4, and connecting mechanism 5 are simultaneously driven in two directions, achieving powerful opening and closing of the compression and stretching of the third fluid chamber 03 and the two one-way valves 2, thus having a wide range of applications.

[0045] The working principle of this invention is roughly as follows: This solution employs a cam mechanism 4 and a linkage mechanism in conjunction to powerfully drive the opening and closing of the one-way valve 2, preventing adhesion and other issues. It is applicable to fluids of various properties, has a wide range of applications, and a long service life. Furthermore, the entire system is driven by a single drive mechanism 3, which moves the piston mechanism 12 and the cam mechanism 4 in two directions, simultaneously achieving powerful opening and closing of the compression and stretching of the third fluid chamber 03 and the two one-way valves 2, thus helping to control costs. The first fluid chamber 011 and the second fluid chamber 021 are both located inside the side wall 102, and the third fluid chamber 03 is formed by the recess of the lower end cover 103. The overall space utilization is reasonable, the structure is compact, and it is conducive to maximizing space utilization, resource utilization, and applicability.

[0046] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A diaphragm water pump, characterized in that, include: The pump body (1), two check valves (2) connected to the fluid inlet (01) and the fluid outlet (02), the drive mechanism (3), the cam mechanism (4) and the connecting mechanism (5); The cam mechanism (4) is mounted on one end of the output shaft of the drive mechanism (3); the connecting mechanism (5) is located between the cam mechanism (4) and the one-way valve (2), and moves along a straight line under the drive of the cam mechanism (4), while simultaneously causing the one-way valve (2) to undergo elastic deformation; The pump body (1) includes: a housing (10), a diaphragm (11) disposed inside the housing (10); and a piston mechanism (12) assembled at the output end of the drive mechanism (3); The diaphragm (11) and the housing (10) are sealed together to form a third fluid chamber (03). The housing (10) is provided with a first fluid chamber (011) and a second fluid chamber (021) respectively connected to two one-way valves (2). The third fluid chamber (03) is connected between the first fluid chamber (011) and the second fluid chamber (021). The drive mechanism (3) includes: a motor (31) mounted on one side of the housing (10), and an eccentric wheel (32) disposed at the output end of the motor (31); The piston mechanism (12) includes: a piston rod (121) sleeved on the eccentric wheel (32), and a movable pressure plate (122) located at the end of the piston rod (121) and connected to the diaphragm (11); under the action of the drive mechanism (3), the piston rod (121) drives the diaphragm (11) to undergo elastic deformation through the movable pressure plate (122); The cam mechanism (4) is a first cam (41) that rotates synchronously with the eccentric wheel (32), and the first cam (41) has a groove (42) along its outer edge; The connecting mechanism (5) includes: a drive link (51) with both ends connected to the two check valves (2) respectively; and a fixed shaft (52) provided on the drive link (51), wherein the fixed shaft (52) is slidably mounted in the groove (42) on the first cam (41) so as to drive the drive link (51) to perform linear reciprocating motion when the first cam (41) rotates; The housing (10) includes: a fixed bracket (101) and side walls (102) symmetrically arranged on both sides of the fixed bracket (101); The first fluid chamber (011) and the second fluid chamber (021) are respectively opened in the two side walls (102); the fluid inlet (01) and the fluid outlet (02) are respectively opened on the outside of the side walls (102) for communicating with the first fluid chamber (011) and the second fluid chamber (021).

2. A diaphragm water pump according to claim 1, characterized in that, The housing (10) further includes a lower end cover (103) disposed at the bottom of the fixed bracket (101), the diaphragm (11) is assembled between the fixed bracket (101) and the lower end cover (103), and the lower end cover (103) is recessed to form the third fluid chamber (03).

3. A diaphragm water pump according to claim 2, characterized in that, The side wall (102) near the lower end cover (103) has a first through hole (1021) that communicates with the first fluid chamber (011) or the second fluid chamber (021). The lower end cover (103) has a second through hole (1031) that mates with the first through hole (1021). The second through hole (1031) communicates with the third fluid chamber (03).

4. A diaphragm water pump according to claim 1, characterized in that, The fixed bracket (101) and the side wall (102) are integrally formed or assembled separately.

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