Diaphragm pump

Abstract

The utility model discloses a diaphragm pump relates to diaphragm pump technical field, wherein, diaphragm pump includes: motor assembly, pump body, motor assembly with pump body drive connection and a plurality of waterproof structure, part waterproof structure locates pump body, part waterproof structure locates motor assembly, part waterproof structure locates the connecting place of motor assembly with pump body. The utility model provides technical scheme has improved the waterproof effect of diaphragm pump.

Description

Technical Field

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

[0002] A diaphragm pump is an important fluid transport device. It completely isolates the drive components (such as a motor) from the transported medium through a flexible diaphragm, thereby achieving pollution-free operation, corrosion resistance, and allowing dry operation. The motor drives the transmission mechanism to make the diaphragm reciprocate, thereby changing the pump chamber volume. With the help of inlet and outlet check valves, the fluid is drawn in and discharged.

[0003] Since diaphragm pumps are used for liquid transportation, they are constantly in contact with the liquid. If the liquid leaks into the pump, it will damage the pump's connections to some extent, especially the motor, thus causing the pump to fail. Utility Model Content

[0004] The main purpose of this invention is to provide a diaphragm pump that improves the waterproof performance of the diaphragm pump.

[0005] To achieve the above objectives, the diaphragm pump proposed in this utility model includes: Motor assembly; Pump body, the motor assembly is driven to the pump body; and Multiple waterproof structures are provided, some of which are located on the pump body, some on the motor assembly, and some at the connection between the motor assembly and the pump body.

[0006] In one embodiment, the pump body includes a pump cover, an end cover, and a cup structure. The end cover is connected to the motor assembly. The pump cover is located at the end of the end cover away from the motor assembly. The cup structure is located inside the end cover. The output end of the motor assembly is drivenly connected to the cup structure to compress or expand the cup structure. The cup structure has at least one bladder with an opening facing the end cover. The bladder is configured as a gas chamber compression chamber and a liquid chamber compression chamber. The pump cover includes a water inlet, a water outlet, an air inlet, and an air outlet. The pump cover is internally divided into a water inlet chamber, a water outlet chamber, an air inlet chamber, and an air outlet chamber. The water inlet is connected to the water inlet chamber and the liquid bottle, the water outlet is connected to the water outlet chamber, the air inlet is connected to the air inlet chamber, and the air outlet is connected to the air outlet chamber and the liquid bottle. The water inlet chamber and the water outlet chamber are both unidirectionally connected to the liquid chamber compression chamber, and the air inlet chamber and the air outlet chamber are both unidirectionally connected to the air chamber compression chamber. The pump cover is provided with a connection hole, and the diaphragm pump also includes a fastener that passes through the connection hole and is connected to the end cap. One of the waterproof structures is configured as a waterproof cap that is located on the pump cover and fastened to the connection hole.

[0007] In one embodiment, one of the waterproof structures is configured as a baffle plate, which is disposed between the pump cover and the end cover, and the fastener passes through the connecting hole and the baffle plate in sequence and is connected to the end cover.

[0008] In one embodiment, the end cap includes an upper cover, a middle cover, and a lower cover arranged sequentially. The upper cover is installed on the pump cover. The middle cover is located on the outer periphery of the upper cover on the side away from the pump cover. The lower cover is installed on the middle cover at the end away from the upper cover and extends in a direction away from the upper cover. The lower cover is installed on the motor assembly. The upper cover, the middle cover, the lower cover, and the motor assembly together form an installation cavity. The cup structure is located in the installation cavity, and the opening of the tower bladder faces the upper cover. One of the waterproof structures is configured as a first sealing ring, which is located between the upper cover and the middle cover and is used to seal the connection between the upper cover and the middle cover.

[0009] In one embodiment, the middle cover body has a mounting position at one end facing the upper cover body, and the outer periphery of the end of the leather cup structure with the tower bladder opening is located at the mounting position; One of the waterproof structures is configured as a second sealing ring, which is located at the bottom of the mounting position and is sealed to the cup structure.

[0010] In one embodiment, one of the waterproof structures is configured as a third sealing ring, which is disposed between the middle cover and the lower cover and is used to seal the connection between the middle cover and the lower cover.

[0011] In one embodiment, the motor assembly includes a motor housing and a motor body. The motor housing is located at one end of the lower cover away from the pump cover and is fixedly connected to the lower cover. The motor body is located inside the motor housing, and the output axis of the motor body passes through the lower cover upward to drive the connection with the cup structure. One of the waterproof structures is configured as a gasket, which is disposed between the lower cover and the motor housing to seal the connection between the lower cover and the motor housing.

[0012] In one embodiment, the motor assembly further includes a rear cover disposed at one end of the motor housing away from the pump body, and one of the waterproof structures is configured as a waterproof coating disposed between the motor housing and the rear cover.

[0013] In one embodiment, the motor housing has a bottom wall away from the pump body and a side wall connected to the bottom wall, the bottom wall and the side wall being integrally formed; And / or, the motor assembly is fitted with a waterproof sleeve.

[0014] In one embodiment, the diaphragm pump further includes a transmission assembly comprising a mounting base, balls, a swivel disc, and a push rod. The output shaft of the motor assembly is connected to the mounting base. The balls are disposed on the mounting base but offset from the axis of the mounting base. One end of the push rod is movably connected to the balls within the mounting base, and the other end is connected to the bottom center of the swivel disc. Each diaphragm cup is provided with a connecting rod that passes through the swivel disc. The motor assembly drives the mounting base to rotate, thereby compressing or relaxing the cup.

[0015] In this invention, the diaphragm pump includes a motor assembly and a pump body. The motor assembly drives the pump body to work, causing liquid to be continuously drawn into the pump body and then expelled from the pump body, thus realizing the input and output of liquid and completing the liquid transportation. At least one waterproof structure is provided on the pump body, which can effectively prevent liquid leakage from inside the pump body to the outside, avoiding liquid pollution of the external environment and reducing liquid waste. It can also prevent external liquids and impurities from entering the pump body, avoiding corrosion, blockage, or damage to the internal components. By providing a waterproof structure on the motor assembly, liquid can be effectively prevented from entering the motor assembly, preventing short circuits in the internal electrical components, maintaining the normal operation of the motor assembly, and extending its service life. Furthermore, at least one waterproof structure is also provided at the connection gap between the pump body and the motor assembly, forming an effective sealing barrier to prevent liquid penetration. In other words, by providing multiple waterproof structures at the pump body, motor assembly, and the connection between the motor assembly and the pump body, liquid leakage can be effectively prevented, protecting the safe operation of the diaphragm pump. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the structure of an embodiment of the diaphragm pump provided by this utility model; Figure 2 A top view schematic diagram of the diaphragm pump provided by this utility model; Figure 3 for Figure 2 A schematic cross-sectional view along the AA direction; Figure 4 This is a schematic diagram of the pump cover in the diaphragm pump provided by this utility model; Figure 5 This is a structural schematic diagram of the pump cover in the diaphragm pump provided by this utility model from another perspective. Figure 6 An exploded structural diagram of the diaphragm pump provided by this utility model; Figure 7 This is an exploded structural diagram of the transmission component in the diaphragm pump provided by this utility model.

[0018] Explanation of icon numbers: 100. Motor assembly; 110. Motor housing; 120. Output shaft; 130. Rear cover; 200. Pump body; 210. Pump cover; 211. Water inlet; 212. Water outlet; 213. Air inlet; 214. Air outlet; 215. Liquid inlet chamber; 216. Liquid outlet chamber; 217. Air inlet chamber; 218. Air outlet chamber; 219. Connecting hole; 220. End cap; 221. Upper cover; 222. Middle cover; 223. Lower cover; 230. Cup structure; 231. Tower chamber; 232. Connecting rod; 233. Connecting edge; 240. Liquid inlet needle; 241. Air outlet needle; 250. Fastener; 260. Check valve; 310. Waterproof cap; 320. Water baffle; 330. First sealing ring; 340. Second sealing ring; 350. Third sealing ring; 360. Gasket; 370. Waterproof coating; 400. Transmission assembly; 410. Mounting base; 420. Ball bearing; 430. Swing disc; 440. Push rod.

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

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] A diaphragm pump is an important fluid transport device. It completely isolates the drive components (such as a motor) from the transported medium through a flexible diaphragm, thereby achieving pollution-free operation, corrosion resistance, and allowing dry operation. The motor drives the transmission mechanism to make the diaphragm reciprocate, thereby changing the pump chamber volume. With the help of inlet and outlet check valves, the fluid is drawn in and discharged.

[0024] Since diaphragm pumps are used for liquid transportation, they are constantly in contact with the liquid. If the liquid leaks into the pump, it will damage the pump's connections to some extent, especially the motor, thus causing the pump to fail.

[0025] This utility model proposes a diaphragm pump.

[0026] Please see Figure 1 Figure 3 In one embodiment of the present invention, the diaphragm pump includes: Motor assembly 100; Pump body 200, motor assembly 100 is drivenly connected to pump body 200; and Multiple waterproof structures are provided, some of which are located in the pump body 200, some in the motor assembly 100, and some at the connection between the motor assembly 100 and the pump body 200.

[0027] In this invention, the diaphragm pump includes a motor assembly 100 and a pump body 200. The motor assembly 100 drives the pump body 200 to operate, causing liquid to be continuously drawn into the pump body 200 and then expelled from the pump body 200, thus realizing the input and output of liquid and completing the liquid transportation. At least one waterproof structure is provided on the pump body 200, which can effectively prevent liquid leakage from inside the pump body 200 to the outside, avoiding liquid pollution of the external environment and reducing liquid waste. It can also prevent external liquids and impurities from entering the pump body 200, avoiding corrosion and blockage of the internal components. In case of blockage or damage, the waterproof structure on the motor assembly 100 can effectively prevent liquid from entering the interior of the motor assembly 100, prevent short circuits in the internal electrical components of the motor assembly 100, maintain the normal operation of the motor assembly 100, and extend the service life of the motor assembly 100. In addition, at least one waterproof structure is provided at the connection gap between the pump body 200 and the motor assembly 100 to form an effective sealing barrier and prevent liquid penetration. That is, by providing multiple waterproof structures at the pump body 200, the motor assembly 100, and the connection between the motor assembly 100 and the pump body 200, liquid leakage can be effectively prevented and the safe operation of the diaphragm pump can be protected.

[0028] Specifically, the motor assembly 100 can be a servo motor, an asynchronous motor, or a DC brushed motor, etc., without limitation. The motor assembly 100 drives the pump body 200 to start working, causing the diaphragm inside the pump body 200 to expand or compress. As the core component for liquid transportation, the pump body 200 completes the suction or discharge of liquid as the diaphragm expands or contracts. Liquid is drawn into the pump chamber from the external pipe, filling the pump chamber of the pump body 200 with liquid, and then the liquid is pushed out of the pump body 200 and flows to the outlet pipe, thereby completing the liquid transportation. The motor assembly 100 includes an output shaft 120, a stator, a rotor, and some electrical components such as windings. During the operation of the motor, the output shaft 120 of the motor assembly 100 extends into the interior of the pump body 200 and connects with the eccentric wheel and other structures inside the pump body 200, causing the internal diaphragm to expand or compress to complete the suction and discharge of water. In an embodiment of this utility model, the pump body 200 includes a pump cover 210, an end cover 220, and a cup structure 230. The end cover 220 is connected to the motor assembly 100. The pump cover 210 is located at the end of the end cover 220 away from the motor assembly 100. The cup structure 230 is located inside the end cover 220. The output end of the motor assembly 100 is drivenly connected to the cup structure 230 so that the cup structure 230 is compressed or expanded. The cup structure 230 has at least one bladder 231 with an opening facing the end cover 220. The bladder 231 is configured as a gas chamber compression chamber and a liquid chamber compression chamber. The pump cover 210 includes an inlet 211, an outlet 212, an air inlet 213, and an air outlet 214. The pump cover 210 is internally divided into an inlet chamber, an outlet chamber, an air inlet chamber 217, and an air outlet chamber 218. The inlet 211 is connected to the inlet chamber and the liquid bottle, the outlet 212 is connected to the outlet chamber, the air inlet 213 is connected to the air inlet chamber 217, and the air outlet 214 is connected to the air outlet chamber 218 and the liquid bottle. The inlet chamber and the outlet chamber are unidirectionally connected to the liquid chamber compression chamber, and the air inlet chamber 217 and the air outlet chamber 218 are unidirectionally connected to the air chamber compression chamber. The pump cover 210 is provided with a connection hole 219. The diaphragm pump also includes a fastener 250, which passes through the connection hole 219 and is connected to the end cover 220. One of the waterproof structures is configured as a waterproof cap 310, which is located on the pump cover 210 and fastened to the connection hole 219.

[0029] Specifically, please refer to Figure 2 and Figure 3 The pump body 200 includes a pump cover 210 and an end cover 220. The pump cover 210 is located at the end of the end cover 220 away from the motor assembly 100, and the bottom of the end cover 220 is fixedly connected to the motor assembly 100. Figure 4 As shown, the pump cover 210 has a through-hole 219 running from top to bottom. A fastener 250 passes through the through-hole 219 from top to bottom and connects to the end cover 220. The fastener 250 can be configured as a screw, which passes downward through the through-hole 219 and screws onto the end cover 220, thus connecting the pump body 200 and the motor assembly 100. Since the upper part of the through-hole 219 on the pump cover 210 is exposed, leakage is likely when liquid flows out from the outlet 212 or the inlet 211. Especially when liquid flows to the through-hole 219, it is easy to leak into the pump body 200, affecting the operation of the diaphragm pump. Therefore, the pump cover 210 has a through-hole 219. A waterproof cap 310 is provided, which is fastened to the connecting hole 219 and has an interference fit with the connecting hole 219. The waterproof cap 310 can be made of elastic materials such as rubber. When it is fastened to the connecting hole 219, it undergoes a certain deformation to improve the sealing effect at the connecting hole 219. This can effectively prevent liquid on the pump cover 210 from flowing into the pump body 200 through the connecting hole 219. In this embodiment, in order to make the connection between the pump cover 210 and the end cover 220 more stable, three fasteners 250 are provided for connection, and three waterproof caps 310 are provided accordingly. A connecting rod is also provided between the three waterproof caps 310 to facilitate simultaneous installation and removal.

[0030] Among them, such as Figure 3 and Figure 6As shown, the cup structure 230 is disposed within the end cap 220 and coaxially with the end cap 220. Multiple bladders 231 are spaced circumferentially within the cup structure 230. Each bladder 231 has an opening at its upper end, forming multiple chambers. The cup structure 230 is moved by the motor assembly 100, causing it to oscillate and compress or expand. Each chamber can be configured as a liquid compression chamber and a gas compression chamber, which are not connected. The compression and expansion of the liquid compression chamber are used to transport liquids, while the compression and expansion of the gas compression chamber are used to transport gases. Since the liquid and gas compression chambers are independently configured, it is more convenient to extract liquids and ventilate. Furthermore, because the motor assembly 100 drives the cup structure to oscillate, when it tilts in a certain direction, one bladder 231 rises, reducing the pump chamber size, while bladders 231 in other directions move downwards, expanding the pump chamber size. For example... Figure 4 and Figure 5 As shown, the pump cover 210 is provided with an inlet 211, an outlet 212, an air inlet 213, and an air outlet 214. Below the pump cover 210 and between it and the end cover 220, an air inlet chamber 217, an air outlet chamber 218, an inlet chamber, and an outlet chamber are formed. The inlet 211 communicates with the inlet chamber, the outlet 212 communicates with the outlet chamber, the air inlet 213 communicates with the air inlet chamber 217, and the air outlet 214 communicates with the air outlet chamber 218. The air inlet chamber 217 and the air outlet chamber 218 are respectively connected to the air chamber compression chamber through air holes. The air inlet chamber 217 and the air outlet chamber 218 are respectively connected to the liquid chamber compression chamber through at least one liquid hole. A one-way valve 260 is provided at each liquid hole and air hole. The one-way valve 260 can be an umbrella-shaped sealing valve plate, which is not limited here. The one-way valve 260 installed at the liquid hole connecting the water inlet chamber and the liquid compression chamber allows the liquid to flow from the liquid inlet chamber 215 to the liquid compression chamber. The one-way valve 260 installed at the liquid hole connecting the water outlet chamber and the liquid compression chamber allows the liquid to enter the liquid outlet chamber 216 from the liquid compression chamber. Similarly, the one-way valve 260 installed at the air hole connecting the air inlet chamber 217 and the air compression chamber allows the gas to enter the air compression chamber from the air inlet chamber 217. The one-way valve 260 installed at the air hole connecting the air compression chamber and the air outlet chamber 218 allows the gas to enter the air outlet chamber 218 from the air compression chamber.

[0031] The specific working process is as follows: Inlet 211 and outlet 214 are respectively connected to sealed liquid bottles. When the liquid chamber compression chamber expands, the container of the liquid chamber compression chamber increases, creating a negative pressure inside. Liquid from the liquid bottle enters the inlet chamber through inlet 211 and then enters the liquid chamber compression chamber through the liquid hole, completing liquid intake. When the liquid chamber compression chamber is compressed, the volume of the liquid chamber compression chamber decreases, and the liquid inside the liquid chamber enters the outlet chamber 216 through other liquid holes, then flows out of the diaphragm pump through the outlet and enters other required locations, completing liquid discharge. It should be noted that when the gas chamber compression chamber expands, gas from the external environment enters through inlet 214. 13 enters the intake chamber 217 and enters the air chamber compression chamber through the air hole to complete the intake. When the air chamber compression chamber is compressed, the gas in the air chamber compression chamber enters the outlet chamber 218 through the air hole and enters the liquid bottle through the outlet 214 to complete the exhaust and replenish the liquid bottle. Since the cup structure 230 is in an oscillating state, it can be understood that when the liquid chamber compression chamber is relaxed, the diaphragm pump draws liquid from the liquid bottle. At this time, the air chamber compression chamber is in a compressed state. The diaphragm pump pumps the gas into the liquid bottle through the outlet 214 to prevent the sealed liquid bottle from being flattened and deformed due to the vacuum suction of the diaphragm pump. They work synchronously.

[0032] In one embodiment, such as Figure 1 and Figure 6 As shown, the pump body 200 also includes an inlet needle 240 and an outlet needle 241. The inlet needle 240 is located at the inlet 211 and communicates with the inlet chamber. The outlet needle 241 is located at the outlet 214 and communicates with the outlet chamber 218. The interiors of the inlet needle 240 and the outlet needle 241 are hollow structures, and notches are provided on the side walls. In this embodiment, the diaphragm pump discharges the gas in the outlet chamber 218 into the outlet needle 241 through the outlet 214, and replenishes the liquid bottle through the notch. The liquid enters the liquid bottle through the notch of the inlet needle 240. The liquid enters the inlet chamber 215 through the inlet needle 240 to complete liquid intake. During compression in the liquid chamber compression chamber, the liquid enters the outlet chamber 216 through the liquid hole in the column bladder 231 and flows out of the diaphragm pump through the outlet. The inlet needle 240 and outlet needle 241 are inserted into the liquid bottle. The needle-shaped structure has a small contact area, making insertion easier. In one embodiment, an outlet pipe communicating with the outlet is provided on the pump cover 210. The liquid flows out through the outlet pipe. The outlet pipe can be guided to the desired position through a flexible hose structure, which is not limited here. It should be noted that the outlet 212 is horizontally set on the pump cover 210 to facilitate smoother flow out of the diaphragm pump.

[0033] In one embodiment of this utility model, one of the waterproof structures is configured as a water baffle 320, which is located between the pump cover 210 and the end cover 220. Fasteners 250 pass through the connecting hole 219 and the water baffle 320 in sequence and are connected to the end cover 220.

[0034] Please refer to Figure 3 and Figure 6 The description is based on one end of the pump cover 210 as the upper part and one end of the motor assembly 100 as the lower part. The baffle plate 320 is made of plastic or rubber, etc., which is not limited here. The baffle plate 320 is located between the pump cover 210 and the end cover 220. Specifically, the top of the end cover 220 is provided with a support position, which is lower than the top surface of the end cover 220. The baffle plate 320 is installed at the support position, and the pump cover 210 is installed on the baffle plate 320. The fasteners 250 pass through the pump cover 210 and the baffle plate 320 from top to bottom and are screwed to the end cover 220. The pump cover 210 and the baffle plate 320 are separated to form a water inlet chamber, a water outlet chamber, an air inlet chamber 217 and an air outlet chamber 218. The upper and lower ends of the baffle plate 320 are connected to the pump cover 210 and the end cover 220 respectively, which can prevent liquid from seeping in from the external screw holes or the gap between the connection between the pump cover 210 and the end cover 220.

[0035] In an embodiment of this utility model, the end cap 220 includes an upper cover 221, a middle cover 222, and a lower cover 223 arranged sequentially. The upper cover 221 is installed on the pump cover 210. The middle cover 222 is located on the outer periphery of the side of the upper cover 221 away from the pump cover 210. The lower cover 223 is installed on the end of the middle cover 222 away from the upper cover 221 and extends in a direction away from the upper cover 221. The lower cover 223 is installed on the motor assembly 100. The upper cover 221, the middle cover 222, the lower cover 223, and the motor assembly 100 together form an installation cavity. The cup structure 230 is located in the installation cavity, and the opening of the tower bladder 231 faces the upper cover 221. One of the waterproof structures is configured as a first sealing ring 330, which is located between the upper cover 221 and the middle cover 222 and is used to seal and connect the upper cover 221 and the middle cover 222.

[0036] Please refer to Figure 3 and Figure 6Still describing the pump cover 210 from top to bottom and the motor assembly 100 from bottom to top, the pump cover 210 includes an upper cover 221, a middle cover 222, and a lower cover 223 arranged from top to bottom. The upper cover 221 is a flat plate structure. The middle cover 222 is installed on the bottom periphery of the upper cover 221, and the lower cover 223 is located on the bottom periphery of the middle cover 222. Both the middle cover 222 and the lower cover 223 are hollow cylindrical structures. The lower cover 223 is connected to the housing of the motor assembly 100 by screws. The cup structure 230 is installed at the bottom of the upper cover 221 and is driven by the motor assembly 100 within the mounting cavity. The fastener 250 passes through the connecting hole 219, upper cover 221, and middle cover 222 on the pump cover 210 from top to bottom and is screwed to the lower cover 223. A first sealing ring 330 is provided between the upper cover 221 and the middle cover 222. The first sealing ring 330 is used to seal the connection between the upper cover 221 and the middle cover 222 to prevent liquid from seeping in from the gap between the upper cover 221 and the middle cover 222. The first sealing ring 330 can be made of nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), fluororubber (FKM), silicone rubber (VMQ), or polytetrafluoroethylene (PTFE), etc., without limitation.

[0037] In an embodiment of this utility model, the middle cover 222 is provided with a mounting position at one end facing the upper cover 221, and the outer periphery of the end of the leather cup structure 230 with the opening of the tower bladder 231 is provided with the mounting position. One of the waterproof structures is configured as a second sealing ring 340, which is located at the bottom of the installation position and is sealed to the cup structure 230.

[0038] Please refer to Figure 3 and Figure 7 The mounting position is configured as a recess on the top of the middle cover 222, and the mounting position is lower than the top of the middle cover 222. The top of the cup structure 230 has a connecting edge 233, which is located on the top of the tower bladder 231 and extends radially outward. During assembly, the upper cover 221 and the lower cover 223 are assembled together, and a gap is formed between the bottom of the upper cover 221 and the mounting position. The connecting edge 233 is located within this gap, and a second sealing ring 340 is provided between the bottom of the connecting edge 233 and the mounting position. The second sealing ring 340 is used to further seal the upper cover 221 and the middle cover 222, preventing the first sealing ring 330 from being breached and seeping in from below the connecting edge 233 of the cup structure 230, thereby further improving the sealing effect.

[0039] The second sealing ring 340 can be made of nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), fluororubber (FKM), silicone rubber (VMQ), or polytetrafluoroethylene (PTFE), etc., without any restrictions.

[0040] In one embodiment of this utility model, one waterproof structure is configured as a third sealing ring 350, which is disposed between the middle cover 222 and the lower cover 223 and is used to seal and connect the middle cover 222 and the lower cover 223.

[0041] Please refer to Figure 3 and Figure 6 Fasteners 250 pass through pump cover 210, upper cover 221, middle cover 222 and lower cover 223 in sequence and are screwed together, thereby connecting pump cover 210 and end cover 220 together. A third sealing ring 350 is provided between the middle cover 222 and the lower cover 223. The third sealing ring 350 is used to seal the connection between the middle cover 222 and the lower cover 223 and can prevent liquid from seeping into the mating gap between the middle cover 222 and the lower cover 223. The third sealing ring 350 can be made of nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), fluororubber (FKM), silicone rubber (VMQ) or polytetrafluoroethylene (PTFE), etc., without limitation.

[0042] In an embodiment of this utility model, the motor assembly 100 includes a motor housing 110 and a motor body. The motor housing 110 is located at the end of the lower cover 223 away from the pump cover 210 and is fixedly connected to the lower cover 223. The motor body is located inside the motor housing 110, and the output shaft 120 of the motor body passes upward through the lower cover 223 to be drivenly connected to the cup structure 230. One of the waterproof structures is a gasket 360, which is located between the lower cover 223 and the motor housing 110 to seal the connection between the lower cover 223 and the motor housing 110.

[0043] Specifically, such as Figure 3 and Figure 6 As shown, the motor assembly 100 includes a motor housing 110 and a motor body. The motor body is disposed inside the motor housing 110. The lower cover 223 has a base plate, which is opposite to the upper cover 221. The motor housing 110 is disposed at the bottom of the lower cover 223 and is connected to the base plate by screws. The output shaft 120 of the motor body passes upward through the base plate and drives the connecting cup structure 230, causing the cup structure 230 to swing, thereby causing the liquid chamber compression chamber and the gas chamber compression chamber to expand or compress. The screws between the motor housing 110 and the base plate are spaced circumferentially. A gasket 360 is provided between the base plate and the motor housing 110, and the gasket 360 is disposed on the outer periphery of the screws. The gasket 360 can prevent liquid from seeping in through the mating gap between the end cover 220 and the motor assembly 100, thus affecting the operation of the motor body.

[0044] In an embodiment of the present invention, the motor assembly 100 further includes a rear cover 130, which is disposed at the end of the motor housing 110 away from the pump body 200. One of the waterproof structures is configured as a waterproof coating 370, which is disposed between the motor housing 110 and the rear cover 130.

[0045] Specifically, a rear cover 130 is provided at the end of the motor housing 110 away from the pump cover 210. The motor body is located inside the motor housing 110 and the rear cover 130. A waterproof coating 370 is provided between the rear cover 130 and the motor housing 110. The waterproof coating 370 can be waterproofed and sealed by using a three-proof paint, a waterproof nano coating or hot melt adhesive to prevent liquid from seeping in.

[0046] In an embodiment of this utility model, the motor housing 110 has a bottom wall away from the pump body 200 and a side wall connected to the bottom wall. The bottom wall and the side wall are integrally formed. Since the motor housing 110 is integrally formed, there are no leaking gaps at the connection between the bottom wall and the side wall, which reduces the probability of water entering the motor assembly 100 and improves the sealing effect.

[0047] In one embodiment, the motor assembly 100 is covered with a waterproof sleeve, which encloses the entire motor assembly 100 inside. The waterproof sleeve can be made of materials such as rubber or silicone to protect the motor assembly 100 and prevent liquid from entering the motor assembly 100 and affecting its operation.

[0048] In an embodiment of this utility model, the diaphragm pump further includes a transmission assembly 400, which includes a mounting base 410, a ball bearing 420, a swing disk 430, and a push rod 440. The output shaft 120 of the motor assembly 100 is connected to the mounting base 410. The ball bearing 420 is disposed on the mounting base 410 and offset from the axis of the mounting base 410. One end of the push rod 440 is movably connected to the ball bearing 420 inside the mounting base 410, and the other end is connected to the bottom center of the swing disk 430. Each diaphragm cup 231 is provided with a connecting rod 232 that passes through the swing disk 430. The motor assembly 100 drives the mounting base 410 to rotate, so that the cup is compressed or expanded.

[0049] Please refer to Figure 3 and Figure 7The output shaft 120 of the motor assembly 100 is driven to connect to a mounting base 410. A ball bearing 420 offset from the axis is mounted on the mounting base 410. The swing disk 430 is universally connected to the ball bearing 420 via a push rod 440. One end of the push rod 440 is inserted into the mounting base 410 and connected to the ball bearing 420, while the other end extends to the bottom center of the swing disk 430. The push rod 440 is also ball-jointed with the swing disk 430. Multiple holes are provided along the edge of the swing disk 430. In this example, there are three holes. Each of the three tower bladders 231 passes through a hole in the swing disk 430 via a connecting rod 232. The motor assembly 100 drives the mounting base 410 to rotate via the output shaft 120. The ball bearing 420 deviates from the center. When the mounting base 410 rotates, the ball bearing 420 moves in a circle, causing one end of the push rod 440 to move in a circular motion along with the ball bearing 420. The other end of the push rod 440 is connected to the center of the swing disk 430. Because the swing disk 430 itself is... The connecting rod 232 of the cup structure 230 is restricted from rotating together. Therefore, the circular motion of the push rod 440 is transformed into a pushing, pulling, and tilting action on the center of the swing plate 430. That is, the push rod 440 drives the center of the swing plate 430 to swing within a conical surface. When the swing plate 430 tilts in a certain direction, it pushes one of the connecting rods 232 upward to compress the chamber of the tower bladder 231 corresponding to that connecting rod 232 for liquid or air discharge. At the same time, it also pulls another connecting rod 232 in the opposite direction downward to expand the chamber of the tower bladder 231 corresponding to that connecting rod 232 for liquid or air intake. As the motor assembly 100 continuously drives the output shaft 120 to rotate, the swing plate 430 swings continuously. The push rods of the three tower bladders 231 are pushed and pulled sequentially and cyclically, which can continuously perform liquid intake and drainage. This also allows the diaphragm pump to operate smoothly. Moreover, one swing plate can drive three chambers at the same time, resulting in a compact structure and high space utilization.

[0050] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A diaphragm pump, characterized in that, include: Motor assembly; Pump body, the motor assembly is drivenly connected to the pump body; as well as Multiple waterproof structures are provided, some of which are located on the pump body, some on the motor assembly, and some at the connection between the motor assembly and the pump body.

2. The diaphragm pump as described in claim 1, characterized in that, The pump body includes a pump cover, an end cover, and a cup structure. The end cover is connected to the motor assembly. The pump cover is located at the end of the end cover away from the motor assembly. The cup structure is located inside the end cover. The output end of the motor assembly is driven to the cup structure so that the cup structure is compressed or expanded. The cup structure has at least one bladder with an opening facing the end cover. The bladder is configured as a gas chamber compression chamber and a liquid chamber compression chamber. The pump cover includes a water inlet, a water outlet, an air inlet, and an air outlet. The pump cover is internally divided into a water inlet chamber, a water outlet chamber, an air inlet chamber, and an air outlet chamber. The water inlet is connected to the water inlet chamber and the liquid bottle, the water outlet is connected to the water outlet chamber, the air inlet is connected to the air inlet chamber, and the air outlet is connected to the air outlet chamber and the liquid bottle. The water inlet chamber and the water outlet chamber are both unidirectionally connected to the liquid chamber compression chamber, and the air inlet chamber and the air outlet chamber are both unidirectionally connected to the air chamber compression chamber. The pump cover is provided with a connection hole, and the diaphragm pump also includes a fastener that passes through the connection hole and is connected to the end cap. One of the waterproof structures is configured as a waterproof cap that is located on the pump cover and fastened to the connection hole.

3. The diaphragm pump as described in claim 2, characterized in that, One of the waterproof structures is configured as a water baffle, which is located between the pump cover and the end cover. The fastener passes through the connecting hole and the water baffle in sequence and is connected to the end cover.

4. The diaphragm pump as described in claim 2, characterized in that, The end cap includes an upper cover, a middle cover, and a lower cover arranged sequentially. The upper cover is installed on the pump cover. The middle cover is located on the outer periphery of the upper cover away from the pump cover. The lower cover is installed on the middle cover at the end away from the upper cover and extends in a direction away from the upper cover. The lower cover is installed on the motor assembly. The upper cover, the middle cover, the lower cover, and the motor assembly together form an installation cavity. The cup structure is located in the installation cavity, and the opening of the tower bladder faces the upper cover. One of the waterproof structures is configured as a first sealing ring, which is located between the upper cover and the middle cover and is used to seal the connection between the upper cover and the middle cover.

5. The diaphragm pump as described in claim 4, characterized in that, The middle cover body has a mounting position at one end facing the upper cover body, and the outer periphery of the end of the leather cup structure with the tower bladder opening is located at the mounting position; One of the waterproof structures is configured as a second sealing ring, which is located at the bottom of the mounting position and is sealed to the cup structure.

6. The diaphragm pump as described in claim 4, characterized in that, One of the waterproof structures is configured as a third sealing ring, which is located between the middle cover and the lower cover and is used to seal the connection between the middle cover and the lower cover.

7. The diaphragm pump as described in claim 4, characterized in that, The motor assembly includes a motor housing and a motor body. The motor housing is located at the end of the lower cover away from the pump cover and is fixedly connected to the lower cover. The motor body is located inside the motor housing, and the output axis of the motor body passes through the lower cover upward to drive the connection with the cup structure. One of the waterproof structures is configured as a gasket, which is disposed between the lower cover and the motor housing to seal the connection between the lower cover and the motor housing.

8. The diaphragm pump as described in claim 7, characterized in that, The motor assembly also includes a rear cover located at the end of the motor housing away from the pump body, and one of the waterproof structures is configured as a waterproof coating located between the motor housing and the rear cover.

9. The diaphragm pump as claimed in claim 7, characterized in that, The motor housing has a bottom wall away from the pump body and a side wall connected to the bottom wall, the bottom wall and the side wall being integrally formed; And / or, the motor assembly is fitted with a waterproof sleeve.

10. The diaphragm pump according to any one of claims 2-9, characterized in that, The diaphragm pump also includes a transmission assembly, which includes a mounting base, balls, a swaying disc, and a push rod. The output shaft of the motor assembly is connected to the mounting base. The balls are disposed on the mounting base and offset from the axis of the mounting base. One end of the push rod is movably connected to the balls inside the mounting base, and the other end is connected to the bottom center of the swaying disc. Each diaphragm cup is provided with a connecting rod that passes through the swaying disc. The motor assembly drives the mounting base to rotate, thereby compressing or relaxing the cup.

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