Diaphragm pump

Abstract

The utility model provides a diaphragm pump, and relates to the field of mechanical engineering. The diaphragm pump comprises a pump body, a driving assembly and a shell, the pump body is provided with a crankshaft, a connecting rod, a shaft frame and an air pumping assembly, the crankshaft is of a split structure, the connecting rod and the shaft frame are of a star-shaped structure, and the air pumping assembly is provided with a diaphragm frame, a diaphragm, a valve frame, an air cover pad, an umbrella valve and an exhaust cover. The driving assembly is provided with a motor, a battery, a control panel, a hood and a motor connecting piece, the shell is provided with an air inlet assembly, a middle shell and an air exhaust assembly, the air inlet assembly is provided with an air inlet hood and an air inlet sealing ring, the air exhaust assembly is provided with an air exhaust connecting piece, an air exhaust cushion, an air exhaust hood and an external air nozzle, and the pump body is sleeved with the middle shell. The motor is assembled in the middle shell through the motor connecting piece, the air inlet assembly and the exhaust assembly are assembled at the two ends of the middle shell respectively, the motor drives the crankshaft to rotate, the crankshaft pushes the connecting rod to do rotary reciprocating motion, the connecting rod drives the diaphragm to blast back and forth, and gas pumping is achieved in cooperation with the one-way non-return function of the umbrella valve.

Description

Technical Field

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

[0002] The existing diaphragm pumps in the prior art use the circular motion of the motor to make the diaphragm inside the pump perform reciprocating motion through a mechanical device. When the diaphragm is of the same material and thickness, the larger the diaphragm, the lower the pressure of the gas pumped by the diaphragm pump. When the motor rotates at the same speed, the size and number of the diaphragms determine the amount of gas pumped per unit time by the diaphragm pump. The layout of the diaphragms of existing diaphragm pumps is a bilaterally symmetrical double-diaphragm structure, or a single-sided multi-hole structure, mainly with 3 to 6 holes. The number of diaphragms is relatively small, resulting in a relatively small gas pumping flow rate while ensuring a certain air pressure.

[0003] Therefore, there is an urgent need for a technical solution with a reasonable structure that can effectively increase the flow rate of a diaphragm pump while controlling the volume of the pump body and ensuring a certain air pressure. Utility Model Content

[0004] The purpose of this application is to provide a diaphragm pump to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The present application provides a diaphragm pump, which includes a pump body, a drive assembly and a housing, the pump body is provided with a crankshaft, a connecting rod, a shaft frame and a pump air assembly, the crankshaft is a split structure, the connecting rod and the shaft frame are a star-shaped structure, the pump air assembly is provided with a membrane frame, a diaphragm, a valve frame, an air cover gasket, an umbrella valve and an exhaust cover, the pump air assembly is ring-mounted on the outside of the shaft frame, the drive assembly is provided with a motor, a battery, a control board, a hood and a motor connector, the housing is provided with an intake assembly, a middle shell and an exhaust assembly, the intake assembly is provided with an intake cover and an intake sealing ring, The exhaust assembly is provided with an exhaust connector, an exhaust pad, an exhaust cover and an external air nozzle. The pump body is sleeved in the middle shell, and the motor is assembled in the middle shell through the motor connector. The intake assembly and the exhaust assembly are respectively assembled at both ends of the middle shell. The motor drives the crankshaft to rotate, and the crankshaft drives the connecting rod to rotate and reciprocate. The connecting rod drives the diaphragm to agitate back and forth, and cooperates with the one-way check function of the umbrella valve to realize gas pumping. By setting a ring-assembled pump air assembly, cooperating with the crankshaft and connecting rod, more diaphragm assemblies can be achieved, thereby improving the gas pumping rate of the diaphragm pump.

[0006] Optionally, the crankshaft is provided with a driving joint, a male part, a female part and a tail joint. The crankshaft is composed of the driving joint, the male part, the female part and the tail joint connected in series in sequence. The driving joint is connected to the motor. One driving joint and one tail joint are each provided. The male part and the female part are configured in corresponding quantities according to actual needs.

[0007] Optionally, the connecting rod is a star-shaped structure, and the connecting rod is provided with a connecting rod body and a connecting rod bearing. The connecting rod body is structurally provided with a connecting rod bearing hole and a piston. A piston air hole is provided in the middle of the piston, and the piston air hole runs through the entire piston. The connecting rod bearing hole is provided in the middle of the connecting rod body, and the piston is provided at the branch end of the connecting rod body. The connecting rod bearing is assembled in the connecting rod bearing hole.

[0008] Optionally, the shaft frame is provided with a shaft frame body and a shaft frame bearing, the shaft frame body is provided with a shaft frame bearing hole, a membrane frame positioning block and a shaft frame fixing hole, the shaft frame bearing hole is arranged in the middle of the shaft frame body, the membrane frame positioning block and the shaft frame fixing hole are arranged on the outside of the shaft frame body, and the shaft frame bearing is assembled in the shaft frame bearing hole.

[0009] Optionally, the crankshaft is connected in series to the shaft frame bearing and the connecting rod bearing, and the shaft frame and the connecting rod are alternately connected in series to the crankshaft in sequence, and the shaft frames are assembled at both ends of the crankshaft.

[0010] Optionally, the membrane frame, diaphragm, valve frame, air cover pad and exhaust cover of the pump air assembly are stacked in sequence and then assembled on the outside of the shaft frame. The membrane frame is provided with a diaphragm groove, a membrane frame fixing hole, a diaphragm positioning groove A, a diaphragm positioning groove B and a shaft frame positioning groove. The membrane frame is positioned and assembled on the outside of the shaft frame through the shaft frame positioning groove and the membrane frame positioning block. The diaphragm is structurally provided with a membrane cavity, a diaphragm fixing hole, a valve frame positioning groove, a diaphragm air hole, a diaphragm positioning ring, a diaphragm positioning block and a piston sleeve. The shape of the diaphragm air hole is set to be semicircular. During assembly, the diaphragm fixing hole is aligned with the membrane frame fixing hole, and the diaphragm positioning ring and the diaphragm positioning block are respectively inserted into the diaphragm positioning groove A and The diaphragm positioning groove B, the membrane cavity is embedded in the diaphragm groove, the piston sleeve is sleeved on the piston, the valve frame is structurally provided with a valve hole, a valve frame fixing hole, a valve frame air hole, a sealing groove and a valve frame positioning ring, the valve frame air hole ring is distributed around the valve hole, when assembled, the valve frame positioning ring is inserted into the valve frame positioning groove, the valve frame fixing hole is aligned with the diaphragm fixing hole, the umbrella valve is fixed on the valve hole, the air cover gasket is structurally provided with an air cover groove and an air cover mouth, the exhaust cover is structurally provided with an air cover sealing ring, an air cover fixing hole and an exhaust nozzle, when assembled, the exhaust nozzle is stuck in the air cover mouth, and the air cover groove is sleeved on the air cover sealing ring, and the air cover gasket is inserted into the sealing groove.

[0011] Optionally, the control board is provided with a main board, a switch and a charging port, the battery is provided with a ring structure, the hood is provided with a hood fixing hole, a plate groove, a wire hole, a hood stud and a hood air intake hole, and the motor connector is provided with a connection fixing hole and a motor fixing hole. During assembly, the motor is fixed on the motor fixing hole, the control board is inserted into the plate groove, the hood fixing hole is aligned and fixed with the connector fixing hole, and the battery is sleeved on the outside of the hood.

[0012] Optionally, the middle shell is provided with an exhaust end screw hole, a switch hole, a charging hole and a drive end screw hole, the air intake hood is provided with an intake hood sealing ring, an intake hood fixing hole and an air intake port, the air intake port structure is a sunken grille structure, the intake sealing ring is assembled on the outside of the intake hood sealing ring, the exhaust connector is provided with an exhaust nozzle notch, an exhaust sealing ring and an exhaust connector fixing hole, the exhaust gasket is provided with an exhaust nozzle sealing ring and an exhaust gasket fixing hole, the exhaust hood is provided with an exhaust nozzle docking groove, an exhaust hood fixing hole and an exhaust port, a vent is opened on the inside of the exhaust nozzle docking groove, the exhaust port structure is a sunken grille structure, and the structure and size of the air intake and exhaust port are the same, the exhaust nozzle is sequentially inserted through the exhaust nozzle notch and the exhaust nozzle sealing ring and then connected to the exhaust nozzle docking groove, the exhaust connector, exhaust gasket and exhaust hood are stacked and fixed on the exhaust end screw hole in sequence, and the external air nozzle is inserted into the exhaust port.

[0013] The beneficial effects of the embodiments of the present application include:

[0014] This application sets a crankshaft with a star-shaped connecting rod, a shaft frame, and a pump air component assembled with a ring cloth, so that more diaphragms can be installed to effectively increase the pumping flow of the diaphragm pump, and the number of membrane frames, diaphragms, umbrella valves, crankshafts and connecting rods can be configured according to actual needs to achieve the required pumping flow.

[0015] This application effectively improves the stability of the pump body operation by setting up a uniformly distributed fixed shaft frame.

[0016] This application effectively improves the utilization rate of the internal space of the pump body by providing a ring-shaped membrane frame and valve frame.

[0017] This application effectively alleviates the problem of motor operating temperature increase by setting an air intake method that directly blows the air into the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the appearance of a diaphragm pump provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the cross-sectional structure of a diaphragm pump provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the disassembly of a diaphragm pump provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the disassembly of the pump body provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the crankshaft structure provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the connecting rod structure provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the shaft frame structure provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the disassembly of the pump assembly provided in an embodiment of the present application;

[0027] Figure 9 This is one of the schematic diagrams of the membrane frame structure provided in the embodiment of the present application;

[0028] Figure 10 The second schematic diagram of the membrane frame structure provided in the embodiment of the present application;

[0029] Figure 11 This is one of the schematic diagrams of the diaphragm structure provided in the embodiment of the present application;

[0030] Figure 12 The second schematic diagram of the diaphragm structure provided in the embodiment of the present application;

[0031] Figure 13 This is one of the schematic diagrams of the valve rack structure provided in the embodiment of the present application;

[0032] Figure 14 The second schematic diagram of the valve frame structure provided in the embodiment of the present application;

[0033] Figure 15 A schematic diagram of the air cap cushion structure provided in an embodiment of the present application;

[0034] Figure 16 A schematic diagram of the exhaust cover structure provided in an embodiment of the present application;

[0035] Figure 17 A schematic diagram of the disassembly of a drive assembly provided in an embodiment of the present application;

[0036] Figure 18 A schematic diagram of the hood structure provided in an embodiment of the present application;

[0037] Figure 19 This is one of the schematic diagrams of the middle shell structure provided in the embodiment of the present application;

[0038] Figure 20 This is one of the schematic diagrams of the middle shell structure provided in the embodiment of the present application;

[0039] Figure 21 A schematic diagram of the disassembly of the air intake assembly provided in an embodiment of the present application;

[0040] Figure 22 A schematic diagram of the disassembly of an exhaust assembly provided in an embodiment of the present application;

[0041] Figure 23 A schematic diagram of the exhaust hood structure provided in an embodiment of the present application.

[0042] In the figure: 01, diaphragm pump, 10, pump body, 11, crankshaft, 111, drive joint, 112, male part, 113, female part, 114, tail joint, 12, connecting rod, 121, connecting rod body, 1211, connecting rod bearing hole, 1212, piston, 12121, piston air hole, 122, connecting rod bearing, 13, shaft frame, 131, shaft frame body, 1311, membrane frame positioning block, 1312, shaft frame bearing hole, 1313, shaft frame fixing hole, 132, shaft frame bearing, 14, pump air assembly, 141, membrane frame, 1411, diaphragm groove, 1412, membrane frame fixing hole, 1413, diaphragm positioning groove A, 1414, diaphragm positioning groove B, 1415, shaft frame positioning groove, 142, diaphragm, 1421, membrane cavity, 1422, diaphragm fixing hole, 1423, Valve frame positioning groove, 1424, diaphragm air hole, 1425, diaphragm positioning ring, 1426, diaphragm positioning block, 1427, piston sleeve, 143, valve frame, 1431, valve hole, 1432, valve frame fixing hole, 1433, valve frame air hole, 1434, sealing groove, 1435, valve frame positioning ring, 144, air cover gasket, 1441, air cover groove, 1442, air cover mouth, 145, umbrella valve, 146, exhaust cover, 1461, air cover sealing ring, 1462, air cover fixing hole, 1463, exhaust nozzle, 147, pump air assembly screw, 20, drive assembly, 21, electric Machine, 22, battery, 23, control board, 231, main board, 232, switch, 233, charging port, 24, hood, 241, hood fixing hole, 242, plate slot, 243, wire hole, 244, hood stud, 245, hood air intake hole, 25, motor connector, 251, connector fixing hole, 252, motor fixing hole, 26, motor screw, 27, hood screw, 30, shell, 31, middle shell, 311, exhaust end screw hole, 312, switch hole, 313, charging hole, 314, drive end screw hole, 32, intake assembly, 321, intake hood, 3 211. Air intake hood sealing ring, 3212. Air intake hood fixing hole, 3213. Air intake port, 322. Air intake sealing ring, 323. Air intake hood screw, 33. Exhaust assembly, 331. Exhaust connector, 3311. Exhaust nozzle notch, 3312. Exhaust sealing ring, 3313. Exhaust connector fixing hole, 332. Exhaust gasket, 3321. Exhaust nozzle sealing ring, 3322. Exhaust gasket fixing hole, 333. Exhaust hood, 3331. Exhaust nozzle docking groove, 3332. Exhaust hood fixing hole, 3333. Exhaust port, 334. External air nozzle, 335. Exhaust hood screw. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of this application, it should be noted that the terms "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of the application is usually placed when in use. These are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0047] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0048] like Figures 1 to 20As shown, this embodiment provides a diaphragm pump 01, which includes a pump body 10, a drive assembly 20 and a housing 30. The pump body 10 is provided with a crankshaft 11, a connecting rod 12, a shaft frame 13 and a pump air assembly 14. The crankshaft 11 is a split structure, and the connecting rod 12 and the shaft frame 13 are a star-shaped structure. The pump air assembly 14 is provided with a membrane frame 141, a diaphragm 142, a valve frame 143, an air cover gasket 144, an umbrella valve 145 and an exhaust cover 146. The pump air assembly 14 is annularly mounted on the outside of the shaft frame 13. The drive assembly 20 is provided with a motor 21, a battery 22, a control board 23, a machine cover 24 and a motor connector 25. The housing 30 is provided with an air intake assembly 32, a middle shell 31 and an exhaust assembly 33. The air intake assembly 32 is provided with an air intake cover 321 and an air intake sealing ring 32 2. The exhaust assembly 33 is provided with an exhaust connector 331, an exhaust pad 332, an exhaust cover 333 and an external air nozzle 334. The pump body 10 is mounted in the middle shell 31. The motor 21 is assembled in the middle shell 31 through the motor connector 25. The intake assembly 32 and the exhaust assembly 33 are respectively assembled at both ends of the middle shell 31. The motor 21 drives the crankshaft 11 to rotate, and the crankshaft 11 pushes the connecting rod 12 to rotate and reciprocate. The connecting rod 12 drives the diaphragm 142 to agitate back and forth, and cooperates with the one-way check function of the umbrella valve 145 to realize gas pumping. By setting a ring-type assembled pump air assembly 14, more diaphragms 142 can be assembled in cooperation with the crankshaft 11 and the connecting rod 12, thereby improving the gas pumping rate of the diaphragm pump 01.

[0049] Specifically, the crankshaft 11 is provided with a driving section 111, a male part 112, a female part 113 and a tail section 114. One end of the driving section 111 is provided with a D-shaped groove that matches the output shaft of the motor, and the other end is provided with a hexagonal connector. Both ends of the male part 112 are provided with hexagonal connectors, and the hexagonal connectors are eccentric structures. Both ends of the female part 113 are provided with hexagonal grooves. The hexagonal connectors at both ends of the male part 112 match the connection dimensions of the hexagonal grooves at both ends of the female part 113. One end of the tail section 114 is provided with a hexagonal connector. A circular end is provided at one end of the angular connector, and the outer diameter of the circular end matches the outer diameter of the shaft frame bearing 132. The hexagonal connectors of the driving section 111, the male part 112, and the tail section 114 have the same size. The crankshaft 11 is composed of the driving section 111, the male part 112, the female part 113 and the tail section 114 connected in series in sequence. The driving section 111 is connected to the motor 21. One driving section 111 and one tail section 114 are each provided, and the male part 112 and the female part 113 are configured in corresponding quantities according to actual needs.

[0050] Specifically, the connecting rod 12 is a star-shaped structure, and the number of branches is generally set to 3 to 12, among which the structure with 6 branches is optimal. The connecting rod 12 is provided with a connecting rod body 121 and a connecting rod bearing 122. The connecting rod body 121 is structurally provided with a connecting rod bearing hole 1211 and a piston 1212. A piston air hole 12121 is provided in the middle of the piston 1212, and the piston air hole 12121 runs through the entire piston 1212. The connecting rod bearing hole 1211 is provided in the middle of the connecting rod body 121, and a limiting ring is provided at one end of the connecting rod bearing hole 1211. The piston 1212 is provided at the branch end of the connecting rod body 121, and the number of the pistons 1212 is most preferably 6. The connecting rod bearing 122 is assembled in the connecting rod bearing hole 1211.

[0051] Specifically, the shaft frame 13 is provided with a shaft frame body 131 and a shaft frame bearing 132. The outer structure of the shaft frame body 131 is optimally set to a hexahedral structure. The shaft frame body 131 is provided with a shaft frame bearing hole 1312, a membrane frame positioning block 1311 and a shaft frame fixing hole 1313, and a limiting ring is provided at one end of the shaft frame bearing hole 1312. The shaft frame bearing hole 1312 is arranged in the middle of the shaft frame body 131, the membrane frame positioning block 1311 and the shaft frame fixing hole 1313 are arranged on the outside of the shaft frame body 131, and the shaft frame bearing 132 is assembled in the shaft frame bearing hole 1312.

[0052] Specifically, the crankshaft 11 is connected in series to the shaft frame bearing 132 and the connecting rod bearing 122 , and the shaft frame 13 and the connecting rod 12 are alternately connected in series to the crankshaft 11 , and the shaft frames 13 are assembled at both ends of the crankshaft 11 .

[0053] Specifically, the pump air assembly 14 is provided with a membrane frame 141, a diaphragm 142, a valve frame 143, an air cover gasket 144, an umbrella valve 145, an exhaust cover 146 and a pump air assembly screw 147. The membrane frame 141, the diaphragm 142, the valve frame 143, the air cover gasket 144 and the exhaust cover 146 of the pump air assembly 14 are stacked in sequence and assembled on the outside of the shaft frame 13 by tightening the pump air assembly screw 147. The membrane frame 141 is provided with a diaphragm groove 1411, a membrane frame fixing hole 1412, a diaphragm positioning groove A1413, a diaphragm positioning groove B1414 and The shaft frame positioning groove 1415, the membrane frame 141 is positioned and assembled on the outside of the shaft frame 13 through the shaft frame positioning groove 1415 and the membrane frame positioning block 1311, the diaphragm 142 is structurally provided with a membrane cavity 1421, a diaphragm fixing hole 1422, a valve frame positioning groove 1423, a diaphragm air hole 1424, a diaphragm positioning ring 1425, a diaphragm positioning block 1426 and a piston sleeve 1427, the diaphragm air hole 1424 is shaped as a semicircular ring, and when assembled, the diaphragm fixing hole 1422 is aligned with the membrane frame fixing hole 1412, and the diaphragm positioning ring 1425 and the diaphragm positioning block 1426 are respectively inserted into the diaphragm positioning groove A1413 and the diaphragm positioning groove B1414, the membrane cavity 1421 is embedded in the diaphragm groove 1411, the piston sleeve 1427 is sleeved on the piston 1212, and the valve rack 143 is structurally provided with a valve hole 1431, a valve rack fixing hole 1432, a valve rack air hole 1433, a sealing groove 1434 and a valve rack positioning ring 1435. The valve rack air hole 1433 is distributed around the valve hole 1431. When assembling, the valve rack positioning ring 1435 is inserted into the valve rack positioning groove 1431. 23. The valve frame fixing hole 1432 is aligned with the diaphragm fixing hole 1412. The umbrella valve 145 is fixed on the valve hole 1431. The air cover gasket 144 is structurally provided with an air cover groove 1441 and an air cover opening 1442. The exhaust cover 146 is structurally provided with an air cover sealing ring 1461, an air cover fixing hole 1462 and an exhaust nozzle 1463. During assembly, the exhaust nozzle 1463 is stuck into the air cover opening 1442, and the air cover groove 1441 is sleeved on the air cover sealing ring 1461. The air cover gasket 144 is inserted into the sealing groove 1434.

[0054] Specifically, the control board 23 is provided with a mainboard 231, a switch 232 and a charging port 233, the battery 22 is provided with a ring structure, the hood 24 is provided with a hood fixing hole 241, a plate groove 242, a wire hole 243, a hood stud 244 and a hood air intake hole 245, and the motor connector 25 is provided with a connection fixing hole 251 and a motor fixing hole 252. During assembly, the motor 21 is fixed on the motor fixing hole 252, the control board 23 is inserted into the plate groove 242, the hood fixing hole 241 is aligned and fixed with the connector fixing hole 251, the battery 22 is sleeved on the outside of the hood 24, and the motor wire is connected to the motor 21 and the control board 23 respectively through the wire hole 243. Pressing the switch 232 can control the start and stop of the motor 21. The charging port 233 is a universal Type-C port, and an external power adapter is connected to the charging port 233 to charge the battery 22.

[0055] Specifically, the middle shell 31 is provided with an exhaust end screw hole 311, a switch hole 312, a charging hole 313 and a drive end screw hole 314, the air intake assembly 32 is provided with an air intake cover 321, an air intake sealing ring 322 and an air intake cover screw 323, the air intake cover 321 is provided with an air intake cover sealing ring 3211, an air intake cover fixing hole 3212 and an air intake port 3213, the air intake port 3213 structure is a sunken grille structure, the air intake sealing ring 322 is assembled on the outside of the air intake cover sealing ring 3211, and the air intake cover 321 can be fastened to the hood stud by the air intake cover screw 323 244, the exhaust assembly 33 is provided with an exhaust connector 331, an exhaust pad 332, an exhaust cover 333 and an exhaust cover screw. The exhaust connector 331 is provided with an exhaust nozzle notch 3311, an exhaust sealing ring 3312 and an exhaust connector fixing hole 3313. The exhaust pad 332 is provided with an exhaust nozzle sealing ring 3321 and an exhaust pad fixing hole 3322. The exhaust cover 333 is provided with an exhaust nozzle docking groove 3331, an exhaust cover fixing hole 3332 and an exhaust port 3333. A vent is provided inside the exhaust nozzle docking groove 3331, and the exhaust port 3333 is structured as a sunken grille. The structure and size of the air inlet 3213 and the exhaust port 3333 are the same. The exhaust nozzle 1463 is sequentially inserted through the exhaust nozzle notch 3311 and the exhaust nozzle sealing ring 3321 and then plugged into the exhaust nozzle docking groove 3331. The outer size of the exhaust nozzle 1463 is slightly larger than the inner size of the exhaust nozzle sealing ring 3321. The assembly of the exhaust nozzle 1463 and the exhaust nozzle sealing ring 3321 is an interference fit. With the exhaust cover screw 335, the exhaust connector 331, the exhaust pad 332, and the exhaust cover 333 are stacked and fixed on the exhaust end screw hole 311 in sequence. When the exhaust cover 333 and the exhaust connector 331 press the exhaust pad 332, the exhaust sealing ring 3312 can improve the air tightness between the exhaust cover 333 and the exhaust connector 331, and the external air nozzle 334 is inserted into the exhaust port 3333. The external air nozzle 334 can also be inserted into the air inlet 3212 for use. The switch hole 312, the charging hole 313 and the switch 232 and the charging port 233 are assembled and matched with each other as an interference fit, which effectively prevents gas from passing through the gap between the switch hole 312, the charging hole 313 and the switch 232 and the charging port 233.

[0056] Specifically, when the air pump 01 is working, the crankshaft 11 of the motor 21 rotates, and the crankshaft 11 drives the connecting rod 12 to rotate and reciprocate, and the piston 1212 reciprocates to compress the membrane cavity 1421. When the piston 1212 pulls the membrane cavity 1421 inward, the gas passes through the air inlet 3213 and the hood air inlet hole 245 in sequence, and is then sucked into the membrane cavity 1421 from the piston air hole 12121. When the piston 1212 squeezes the membrane cavity 1421 outward, the gas is sucked into the membrane cavity 1421 through the air inlet 3213 and the hood air inlet hole 245 in sequence. When the membrane cavity 1421 is open, the gas cannot flow back from the piston air hole 12121 because the bottom of the membrane cavity 1421 blocks the piston air hole 12121. The gas is pressurized to pass through the valve rack air hole 1433 and push open the umbrella valve 145. The gas enters the air channel formed between the exhaust cover 146 and the valve rack 143 and is discharged through the exhaust nozzle 1463, the exhaust hood 333 and the exhaust port 3333 in sequence, completing the entire process from gas inhalation to pumping out.

[0057] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A diaphragm pump, characterized in that: include: The pump body, drive assembly and housing are provided with a crankshaft, a connecting rod, a shaft frame and a pumping assembly. The crankshaft is a split structure, the connecting rod and the shaft frame are a star-shaped structure, the pumping assembly is provided with a membrane frame, a diaphragm, a valve frame, an air cover gasket, an umbrella valve and an exhaust cover, the pumping assembly is ring-mounted on the outside of the shaft frame, the drive assembly is provided with a motor, a battery, a control panel, a machine cover and a motor connector, the housing is provided with an intake assembly, a middle shell and an exhaust assembly, the intake assembly is provided with an intake cover and an intake sealing ring, the exhaust assembly is provided with an exhaust connector, an exhaust gasket, an exhaust cover and an external air nozzle, the pump body is sleeved in the middle shell, the motor is assembled in the middle shell through the motor connector, the intake assembly and the exhaust assembly are respectively assembled at both ends of the middle shell, the motor drives the crankshaft to rotate, the crankshaft drives the connecting rod to rotate and reciprocate, the connecting rod drives the diaphragm to agitate back and forth, and cooperates with the one-way check function of the umbrella valve to realize gas pumping.

2. The diaphragm pump according to claim 1, characterized in that The crankshaft is provided with a driving joint, a male part, a female part and a tail joint. The crankshaft is composed of the driving joint, the male part, the female part and the tail joint connected in series in sequence. The driving joint is connected to the motor. One driving joint and one tail joint are each provided. The male part and the female part are configured in corresponding quantities according to actual needs.

3. The diaphragm pump according to claim 1, characterized in that The connecting rod has a star-shaped structure and is provided with a connecting rod body and a connecting rod bearing. The connecting rod body is structurally provided with a connecting rod bearing hole and a piston. A piston air hole is provided in the middle of the piston, and the piston air hole runs through the entire piston. The connecting rod bearing hole is provided in the middle of the connecting rod body, and the piston is provided at the branch end of each connecting rod body. The connecting rod bearing is assembled in the connecting rod bearing hole.

4. The diaphragm pump according to claim 1, characterized in that The shaft frame is provided with a shaft frame body and a shaft frame bearing. The shaft frame body is provided with a shaft frame bearing hole, a membrane frame positioning block and a shaft frame fixing hole. The shaft frame bearing hole is arranged in the middle of the shaft frame body, the membrane frame positioning block and the shaft frame fixing hole are arranged on the outside of the shaft frame body, and the shaft frame bearing is assembled in the shaft frame bearing hole.

5. The diaphragm pump according to claim 1, characterized in that The crankshaft is connected in series with the shaft frame bearing and the connecting rod bearing, and the shaft frame and the connecting rod are alternately connected in series on the crankshaft in sequence, and the shaft frames are assembled at both ends of the crankshaft.

6. The diaphragm pump according to claim 1, wherein The membrane frame, diaphragm, valve frame, air cover pad and exhaust cover of the pump air assembly are stacked in sequence and then assembled on the outside of the shaft frame. The membrane frame is provided with a diaphragm groove, a membrane frame fixing hole, a diaphragm positioning groove A, a diaphragm positioning groove B and a shaft frame positioning groove. The membrane frame is positioned and assembled on the outside of the shaft frame through the shaft frame positioning groove and the membrane frame positioning block. The diaphragm is structurally provided with a membrane cavity, a diaphragm fixing hole, a valve frame positioning groove, a diaphragm air hole, a diaphragm positioning ring, a diaphragm positioning block and a piston sleeve. The shape of the diaphragm air hole is set to be a semicircular ring. During assembly, the diaphragm fixing hole is aligned with the membrane frame fixing hole, and the diaphragm positioning ring and the diaphragm positioning block are respectively inserted into the diaphragm positioning groove A And the diaphragm positioning groove B, the membrane cavity is embedded in the diaphragm groove, the piston sleeve is on the piston, the valve frame is structurally provided with a valve hole, a valve frame fixing hole, an air hole, a sealing groove and a valve frame positioning ring, the air hole ring is distributed around the valve hole, when assembled, the valve frame positioning ring is inserted into the valve frame positioning groove, the valve frame fixing hole is aligned with the diaphragm fixing hole, the umbrella valve is fixed on the valve hole, the air cover gasket is structurally provided with an air cover groove and an air cover groove, the exhaust cover is structurally provided with an air cover sealing ring, an air cover fixing hole and an exhaust nozzle, when assembled, the exhaust nozzle is stuck in the air cover groove, and the air cover groove is sleeved on the air cover sealing ring, and the air cover gasket is inserted into the sealing groove.

7. The diaphragm pump according to claim 1, characterized in that The control board is provided with a mainboard, a switch and a charging port, the switch is provided with a switch sealing sleeve, the battery is provided with a ring structure, the hood is provided with a hood fixing hole, a plate groove, a wire hole, a hood stud and a hood air intake hole, the motor connector is provided with a connection fixing hole and a motor fixing hole, the motor is fixed on the motor fixing hole during assembly, the control board is inserted into the plate groove, the hood fixing hole is aligned and fixed with the connection fixing hole, and the battery is sleeved on the outside of the hood.

8. The diaphragm pump according to claim 1, characterized in that The middle shell is provided with an exhaust end screw hole, a switch hole, a charging hole and a drive end screw hole, the air intake cover is provided with an air intake cover fixing hole and an air intake port, the air intake port structure is a sunken grille structure, the air intake sealing ring is assembled on the outside of the air intake cover sealing ring, the exhaust connector is provided with an exhaust nozzle notch, an exhaust sealing ring and an exhaust connector fixing hole, the exhaust gasket is provided with an exhaust nozzle sealing ring and an exhaust gasket fixing hole, the exhaust cover is provided with an exhaust nozzle docking groove, an exhaust cover fixing hole and an exhaust port, a vent is provided on the inside of the exhaust nozzle docking groove, the exhaust port structure is a sunken grille structure, and the air intake port and the exhaust port have the same structure and size, the exhaust nozzle is sequentially inserted through the exhaust nozzle notch and the exhaust nozzle sealing ring and then connected to the exhaust nozzle docking groove, the exhaust connector, exhaust gasket and exhaust cover are stacked and fixed on the exhaust end screw hole in sequence, and the external air nozzle is inserted into the exhaust port.

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