Diaphragm pump

Abstract

The invention provides a diaphragm pump, and relates to the field of mechanical engineering. The diaphragm pump comprises a diaphragm pump body, a connecting piece and a motor, the diaphragm pump body is provided with a shell, a crankshaft, a connecting rod, a shaft frame, a diaphragm, a diaphragm frame, a valve seat and a valve clack, the shell is provided with an outer shell and an end cover, the connecting piece is provided with a coupler and a connecting plate, and the motor is provided with an output shaft and a support; the connecting rod is of a star-shaped structure and is arranged on the crankshaft; one end of the diaphragm is connected with one end of the diaphragm frame, one end of the connecting rod is connected with the end part of the connecting rod; one end of the coupler is connected with the crankshaft, and the other end of the coupler is connected with an output shaft of the motor; the motor is assembled on the end cover through a connecting plate; the motor drives the crankshaft to rotate through the coupler, the crankshaft drives the connecting rod to do rotary reciprocating motion, the connecting rod drives the diaphragm pump to pump gas back and forth, more diaphragm assembly numbers are achieved by arranging the annular diaphragm frame and the valve seat in cooperation with the crankshaft and the connecting rod, and the gas pumping speed of the diaphragm pump is increased.

Description

Technical Field

[0001] This application relates to the field of mechanical engineering, and particularly to a diaphragm pump. Background Art

[0002] In the prior art, the pumping method of the diaphragm pump is the circular motion of the motor. Through a mechanical device, the diaphragm inside the pump makes a reciprocating motion. When the diaphragm is of the same material and thickness, the larger the diaphragm, the smaller the pressure of the gas pumped by the diaphragm pump. And at the same motor speed, the size and number of diaphragms determine the amount of gas pumped by the diaphragm pump per unit time. The layout of the diaphragms in the existing diaphragm pump is a double-diaphragm structure with left-right symmetry, 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 the diaphragm pump while controlling the volume of the pump body and ensuring a certain air pressure. Summary of the Invention

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

[0005] To achieve the above purpose, this application provides the following technical solution: This application provides a diaphragm pump, which includes a diaphragm pump body, a coupling piece, and a motor. The diaphragm pump body is provided with a housing, a crankshaft, a connecting rod, a shaft frame, a diaphragm, a diaphragm frame, a valve seat, and a valve flap. The housing is provided with an outer shell and an end cover. The coupling piece is provided with a coupling and a connecting plate. The motor is provided with an output shaft and a support. Both the diaphragm frame and the valve seat are formed by connecting multiple plate bodies in a ring shape. The diaphragm frame is nested inside the valve seat. The shaft frame is assembled inside the diaphragm frame. The crankshaft is installed on the shaft frame. The connecting rod is of a star shape and is installed on the crankshaft. One end of the diaphragm is connected to the diaphragm frame and the other end is connected to the end of the connecting rod. One end of the coupling is connected to the crankshaft and the other end is connected to the output shaft of the motor. The motor is assembled on the end cover through the connecting plate. The motor drives the crankshaft to rotate through the coupling. The crankshaft drives the connecting rod to make a reciprocating rotary motion. The connecting rod agitates the diaphragm back and forth to pump gas. By setting an annular diaphragm frame and valve seat, and cooperating with the crankshaft and the connecting rod, more diaphragm assembly quantities are realized, and the gas pumping rate of the diaphragm pump is increased.

[0006] Optionally, the housing is provided with an outer shell and an end cover. The outer shell is provided with an exhaust port, an end cover seat, a valve seat groove, and an exhaust limiting rib. The exhaust port is arranged at the top of the outer shell. The end cover seat is arranged inside the port of the outer shell. The valve seat groove is longitudinally arranged inside the outer shell. The exhaust limiting rib is arranged inside the top of the outer shell and has a non - continuous ring structure. The end cover is provided with an end cover through - hole, end cover fixing holes, end cover studs, and end cover limiting ribs.

[0007] Optionally, the crankshaft is provided with a drive end, main journal bearings, and connecting rod journals. The crankshaft is assembled on the main journal holes of the axle bracket through the main journal bearings.

[0008] Optionally, the connecting rod has a star - shaped structure. The connecting rod is structurally provided with a connecting rod - crankshaft hole, a piston, a connecting rod air hole, and a piston air hole. The connecting rod - crankshaft hole is arranged at the center of the connecting rod. The piston is arranged at the branch end of each connecting rod. The connecting rod air hole is arranged in each branch of the connecting rod. The piston air hole is arranged at the center of the piston, and the connecting rod air hole communicates with the piston air hole. The connecting rod is assembled on the connecting rod journal of the crankshaft.

[0009] Optionally, the diaphragm bracket is structurally provided with a diaphragm groove, a diaphragm cavity, and an axle bracket positioning hole.

[0010] Optionally, the axle bracket is provided with a main journal hole and an axle bracket positioning bolt. The axle bracket is positioned and assembled on the axle bracket positioning hole inside the diaphragm bracket through the axle bracket positioning bolt.

[0011] Optionally, the diaphragm is structurally provided with a diaphragm bracket connection end, a diaphragm sealing ring, a piston connection end, a bladder cavity, an intake diaphragm valve, and a diaphragm intake port. The diaphragm bracket connection end is a continuous part of the diaphragm. The diaphragm sealing ring is a circular sealing rib arranged on the end face of the diaphragm bracket connection end. The piston connection end and the bladder cavity are both arranged side - by - side and evenly distributed on the diaphragm bracket connection end. The intake diaphragm valve and the diaphragm intake port are arranged between the bladder cavity and the piston connection end. The diaphragm piston connection end is sleeved on the piston of the connecting rod, and the diaphragm bracket connection end is clamped in the diaphragm groove of the diaphragm bracket.

[0012] Optionally, the valve seat plate is structurally provided with a valve seat fixing groove, a valve flap groove, a valve flap fixing hole, and a valve seat exhaust hole. The valve seat fixing groove is arranged on both sides of the valve seat plate. The valve flap groove, the valve flap fixing hole, and the valve seat exhaust hole are evenly distributed in the middle of the valve seat plate. The valve flap groove is structured as a circular groove. The valve flap fixing hole is arranged in the middle of the valve flap groove. The valve seat exhaust hole is arranged in the valve flap groove and is circumferentially distributed around the valve flap fixing hole. The valve seat is sleeved on the outside of the diaphragm bracket and is fixed on the valve seat groove of the outer shell through the fixing groove of the valve seat.

[0013] Optionally, the valve flap is provided with a flap and a snap head, and the snap head is fixed in the valve flap fixing hole provided in the valve seat.

[0014] Optionally, the motor is provided with an output shaft and a motor fixing hole, and the motor is fixedly connected to the connection plate through the motor fixing hole.

[0015] Optionally, the connecting member is provided with a coupling and a connection plate. The coupling is provided with a crankshaft connection end and a motor connection end. The crankshaft connection end is connected to the driving end of the crankshaft, and the motor connection end is connected to the output shaft of the motor. The connection plate is provided with a connection plate through hole, a pump body connection hole and a motor connection hole. One side of the connection plate is fixedly connected to the pump body through the pump body connection hole, and the other side is fixedly connected to the motor through the motor connection hole.

[0016] The beneficial effects of the embodiments of the present application include: In the present application, by providing a diaphragm frame and a valve seat composed of a crankshaft, a star-shaped connecting rod and a multi-piece plate body connected in a ring shape, more diaphragms can be assembled to effectively improve the pumping flow rate of the diaphragm pump, and the number of the diaphragm frame, diaphragm, valve flap, crankshaft main journal, crankshaft connecting rod journal, star-shaped connecting rod and star-shaped connecting rod branches can be configured according to actual needs to achieve the required pumping flow rate.

[0017] In the present application, by providing a uniformly fixed shaft frame, each crankshaft main journal and crankshaft connecting rod journal has a fixed support, effectively improving the smoothness of the pump body operation.

[0018] In the present application, by providing a circumferentially arranged diaphragm frame and valve seat, the utilization rate of the internal space of the pump body is effectively improved. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic external view of the diaphragm pump provided by the embodiment of the present application; Figure 2 It is one of the schematic cross-sectional structures of the diaphragm pump provided by the embodiment of the present application; Figure 3 It is an exploded view of the diaphragm pump provided by the embodiment of the present application; Figure 4 It is a schematic structure diagram of the housing provided by the embodiment of the present application; Figure 5 It is a schematic external shell structure diagram of the housing provided by the embodiment of the present application; Figure 6 One of the schematic diagrams of the end cover structure of the housing provided by the embodiment of the present application; Figure 7 Another schematic diagram of the end cover structure of the housing provided by the embodiment of the present application; Figure 8 One of the schematic diagrams of the membrane frame structure provided by the embodiment of the present application; Figure 9 Another schematic diagram of the membrane frame structure provided by the embodiment of the present application; Figure 10 One of the schematic diagrams of the diaphragm structure provided by the embodiment of the present application; Figure 11 Another schematic diagram of the diaphragm structure provided by the embodiment of the present application; Figure 12 Schematic diagram of the valve seat structure provided by the embodiment of the present application; Figure 13 Schematic diagram of the valve flap structure provided by the embodiment of the present application; Figure 14 Schematic diagram of the crankshaft structure provided by the embodiment of the present application; Figure 15 Schematic diagram of the shaft seat structure provided by the embodiment of the present application; Figure 16 Schematic diagram of the connecting rod structure provided by the embodiment of the present application; Figure 17 Schematic diagram of the connector structure provided by the embodiment of the present application; Figure 18 Schematic diagram of the coupling structure provided by the embodiment of the present application; Figure 19 Schematic diagram of the connecting plate structure provided by the embodiment of the present application; Figure 20 Schematic diagram of the motor structure provided by the embodiment of the present application.

[0021] In the figure: 01, diaphragm pump; 10, diaphragm pump body; 110, housing; 111, outer shell; 1111, exhaust port; 1112, end cover seat; 1113, valve seat groove; 1114, exhaust limit rib; 112, end cover; 1121, end cover through hole; 1122, end cover fixing hole; 1123, end cover stud; 1124, end cover limit rib; 113, inner sealing ring; 114, outer sealing ring; 115, end cover screw; 121, crankshaft; 1211, drive end; 1212, main journal; 1213, connecting rod journal; 122, shaft bracket; 1221, main shaft hole; 1222, shaft bracket positioning bolt; 123, connecting rod; 1231, connecting rod crankshaft hole; 1232, piston; 1233, connecting rod air hole; 1234, piston air hole; 124, diaphragm bracket; 1241, diaphragm groove; 1242, diaphragm cavity; 1243, shaft bracket positioning hole; 125, diaphragm; 1251, diaphragm bracket connection end; 1252, diaphragm sealing ring; 1253, piston connection end; 1254, bladder cavity; 1255, intake diaphragm flap; 1256, diaphragm intake port; 126, valve seat; 1261, valve seat fixing groove; 1262, valve flap groove; 1263, valve flap fixing hole; 1264, valve seat exhaust hole; 127, valve flap; 1271, flap; 1272, buckle head; 128, sealing baffle; 20, connector; 21, coupling; 211, crankshaft connection end; 212, motor connection end; 22, connection plate; 221, connection plate through hole; 222, pump body connection hole; 223, motor connection hole; 23, screw A; 24, screw B; 30, motor; 301, output shaft; 302, support; 303, cable. Embodiment

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] 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 claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0024] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0026] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] As Figures 1 to 20 shown, this embodiment provides a diaphragm pump 01, which includes a diaphragm pump body 10, a coupling member 20, and a motor 30. The diaphragm pump body 10 is provided with a housing 110, a crankshaft 121, a connecting rod 123, a shaft frame 122, a diaphragm 125, a diaphragm frame 124, a valve seat 126, and a valve flap 127. The housing 110 is provided with an outer shell 111 and an end cover 112. The coupling member 20 is provided with a coupling 21 and a coupling plate 22. The motor 30 is provided with an output shaft 301 and a support 302. Both the diaphragm frame 124 and the valve seat 126 are formed by connecting multiple plate bodies in a ring shape. The diaphragm frame 124 is nested inside the valve seat 126. The shaft frame 122 is assembled inside the diaphragm frame 124. The crankshaft 121 is installed on the shaft frame 122. The connecting rod 123 has a star shape and is installed on the crankshaft 121. One end of the diaphragm 125 is connected to the diaphragm frame 124 and the other end is connected to the end of the connecting rod 123. One end of the coupling 21 is connected to the crankshaft 121 and the other end is connected to the output shaft 301 of the motor 30. The motor 30 is assembled on the end cover 112 through the coupling plate 22. The motor 30 drives the crankshaft 121 to rotate through the coupling 21. The crankshaft 121 drives the connecting rod 123 to reciprocate. The connecting rod 123 pumps gas by agitating the diaphragm 125 back and forth. By providing the annular diaphragm frame 124 and valve seat 126, and cooperating with the crankshaft 121 and the connecting rod 123, the number of diaphragms 125 assembled can be increased, and the gas pumping rate of the diaphragm pump 01 can be improved.

[0028] Specifically, the housing 110 is provided with a housing shell 111 and an end cap 112. The housing shell 111 is provided with an exhaust port 1111, an end cap seat 1112, a valve seat groove 1113, and an exhaust limiting rib 1114. The exhaust port 1111 is arranged at the top of the housing shell 111. The end cap seat 1112 is arranged inside the port of the housing shell 111. The valve seat groove 1113 is longitudinally arranged inside the housing shell 111. The number of the valve seat grooves 1113 matches the number of the valve seats 126. The exhaust limiting rib 1114 is arranged on the inner side of the top of the housing shell 111 and has a discontinuous ring structure. The end cap 112 is provided with an end cap through hole 1121, an end cap fixing hole 1122, an end cap stud 1123, and an end cap limiting rib 1124. The diameter of the end cap through hole 1121 is larger than the outer diameter of the coupling 21. An inner sealing ring 113, an outer sealing ring 114, and end cap screws 115 are further arranged between the housing shell 111 and the end cap 112. The inner sealing ring 113 is arranged outside the end cap limiting rib 1124 and is pressed between the end face of the valve seat 126 and the end cap 112 by the end cap 112. The outer sealing ring 114 is arranged inside the port of the housing shell 111 and outside the end cap seat 1112 and is pressed between the outside of the end cap seat 1112 and the end cap 112 by the end cap 112. The end cap screws 115 fix the end cap 112 to the end cap seat 1112 through the end cap fixing holes 1122.

[0029] Specifically, the crankshaft 121 is provided with a driving end 1211, a main journal 1212, and a connecting rod journal 1213. The crankshaft 121 is assembled on the main journal hole 1221 of the axle bracket 122 through the main journal 1212. The number of the main journals 1212 and the connecting rod journals 1213 of the crankshaft 121 is greater than or equal to 2, and the corresponding number can be set according to actual needs.

[0030] Specifically, the connecting rod 123 has a star structure, and the number of branches of the connecting rod 123 is greater than or equal to 3. The connecting rod 123 is structurally provided with a connecting rod crankshaft hole 1231, a piston 1232, a connecting rod air hole 1233, and a piston air hole 1234. The connecting rod crankshaft hole 1231 is arranged at the center of the connecting rod 123. The piston 1232 is arranged at the end of each branch of the connecting rod 123. The connecting rod air hole 1233 is arranged in each branch of the connecting rod 123. The piston air hole 1234 is arranged at the center of the piston 1232, and the connecting rod air hole 1233 communicates with the piston air hole 1234. The connecting rod 123 is assembled on the connecting rod journal 1213 of the crankshaft 121, and the number of assembled connecting rods 123 is the same as the number of the connecting rod journals 1213 provided on the crankshaft 121.

[0031] Specifically, the membrane holder 124 is formed by enclosing multiple membrane holder plates with the same structure. The number of the membrane holder plates is the same as the number of the connecting rod branches, and the diaphragm groove 1241, the diaphragm cavity 1242 and the shaft holder positioning holes 1243 are arranged on the structure. The number of the diaphragm cavities 1241 on each membrane holder 124 is the same as the number of the connecting rod journals 1213 of the crankshaft 121.

[0032] Specifically, the shaft holder 122 is provided with a main shaft hole 1221 and a shaft holder positioning bolt 1222. The shaft holder 122 is positioned and assembled on the shaft holder positioning holes 1243 on the inner side of the membrane holder 124 through the shaft holder positioning bolt 1222. The number of the assembled shaft holders 122 is the same as the number of the main shaft journals 1213 of the crankshaft 121.

[0033] Specifically, the diaphragm 125 is composed of multiple diaphragm sheets with the same structure and a juxtaposed and connected structure. The number of the diaphragm sheets is the same as the number of the membrane holder plates. The diaphragm sheets are provided with a membrane holder connection end 1251, a diaphragm sealing ring 1252, a piston connection end 1253, a bladder cavity 1254, an intake membrane flap 1255 and a diaphragm intake port 1256 on the structure. The membrane holder connection end 1251 is the connected part of the diaphragm sheets. The diaphragm sealing ring 1252 is a circular sealing rib arranged on the end face of the membrane holder connection end 1251. The piston connection end 1253 and the bladder cavity 1254 are both juxtaposed and evenly distributed on the membrane holder connection end 1251. The juxtaposed number of the piston connection ends 1253 and the bladder cavities 1254 on a single diaphragm sheet is the same as the number of the diaphragm cavities 1241 on each membrane holder 124. The intake membrane flap 1255 and the diaphragm intake port 1256 are arranged between the bladder cavity 1254 and the piston connection end 1253. The diaphragm piston connection end 1253 is sleeved on the piston 1232 of the connecting rod 123. The membrane holder connection end 1251 is clamped in the diaphragm groove 1241 of the membrane holder 124.

[0034] Specifically, the valve seat 126 is formed by enclosing multiple valve seat plates with the same structure. The number of the valve seat plates is the same as that of the membrane frame plates. The valve seat plates are structurally provided with a valve seat fixing groove 1261, a valve flap groove 1262, a valve flap fixing hole 1263, and a valve seat exhaust hole 1264. The valve seat fixing groove 1261 is arranged on both sides of the valve seat plate. The valve flap groove 1262, the valve flap fixing hole 1263, and the valve seat exhaust hole 1264 are evenly arranged in the middle of the valve seat plate. The structure of the valve flap groove 1262 is a circular groove. The number of the valve flap grooves 1262 on a single valve seat plate is the same as the number of the diaphragm chambers 1241 on each membrane frame 124. The valve flap fixing hole 1263 is arranged in the middle of the valve flap groove 1262. The valve seat exhaust hole 1264 is arranged in the valve flap groove 1262 and is circumferentially arranged around the valve flap fixing hole 1263. The circumferential arrangement number of the valve seat exhaust holes 1264 is greater than or equal to 3. The valve seat 126 is sleeved on the outer side of the membrane frame 124 and is fixed on the valve seat groove 1113 of the outer shell 111 through the valve seat fixing groove 1261.

[0035] Specifically, the valve flap 127 is provided with a flap piece 1271 and a buckle head 1272. The buckle head 1272 is fixed in the valve flap fixing hole 1263 arranged on the valve seat 126. The number of the valve flaps 127 is the same as the number of the valve flap grooves 1262.

[0036] Specifically, the length of the membrane frame 124 is greater than that of the valve seat 126. The annular end face formed by the membrane frame 124 is higher than the annular end face formed by the valve seat 126. The thickness of the sealing baffle 128 is equal to the length difference between the valve seat 126 and the membrane frame 124. The sealing baffle 128 is encapsulated at the annular end formed by the enclosure of the membrane frame 124 and the valve seat 126, and one side abuts against the end face of the valve seat 126, and the other side is flush with the end face of the membrane frame 124.

[0037] Specifically, the motor 30 is structurally provided with an output shaft 301 and a support 302, and the motor 30 is also configured with a cable 303. The motor 30 is fixedly connected to the connection plate 22 through the support 302. After the motor is powered through the cable 303, the motor 30 can be driven to operate.

[0038] Specifically, the coupling member 20 is provided with a coupling 21 and a coupling plate 22. The coupling 21 is provided with a crankshaft coupling end 211 and a motor coupling end 212. The crankshaft coupling end 211 is coupled to the driving end 1211 of the crankshaft 121, and the motor coupling end 212 is coupled to the output shaft 301 of the motor 30. The coupling plate 22 is provided with a coupling plate through hole 221, a pump body coupling hole 222, and a motor coupling hole 223. One side of the coupling plate 22 is fixedly coupled to the pump body 10 through the pump body coupling hole 222 with the screw B 24, and the other side is fixedly coupled to the motor 30 through the motor coupling hole 223 with the screw A 23.

[0039] Specifically, the motor 30 drives the crankshaft 121 to rotate through the coupling 21. The crankshaft 121 drives the connecting rod 123 to perform a reciprocating rotational motion. When the connecting rod 123 pushes and pulls the diaphragm 125 to cycle back and forth, when the diaphragm 125 is lifted by the connecting rod 123, the gas sequentially passes through the end cover through hole 1121 and the gap of the coupling 21, the connecting rod air hole 1233, and the piston air hole 1234, and enters the interior of the bladder cavity 1254 through the diaphragm air inlet 1256 after pushing open the intake diaphragm valve 1255. When the connecting rod 123 squeezes the diaphragm 125, the intake diaphragm valve 1255 blocks the piston air hole 1234, and the gas cannot be discharged from the piston air hole 1234. The squeezed gas pushes open the valve flap 127 and is discharged from the exhaust port 1111 through the valve seat exhaust hole 1264, the gap between the valve seat 126 and the diaphragm holder 124.

[0040] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A diaphragm pump, characterized in that, Including: A diaphragm pump body, a coupling member, and a motor. The diaphragm pump body is provided with a housing, a crankshaft, a connecting rod, a shaft bracket, a diaphragm, a diaphragm bracket, a valve seat, and a valve flap. The housing is provided with an outer shell and an end cover. The coupling member is provided with a coupling and a coupling plate. The motor is provided with an output shaft and a support. The diaphragm bracket and the valve seat are both formed by circumferentially connecting multiple plate bodies. The diaphragm bracket is nested inside the valve seat. The shaft bracket is assembled inside the diaphragm bracket. The crankshaft is installed on the shaft bracket. The connecting rod is of a star structure and is installed on the crankshaft. One end of the diaphragm is connected to the diaphragm bracket and the other end is connected to the end of the connecting rod. One end of the coupling is connected to the crankshaft and the other end is connected to the output shaft of the motor. The motor is assembled on the end cover through the coupling plate. The motor drives the crankshaft to rotate through the coupling. The crankshaft drives the connecting rod to reciprocate. The connecting rod agitates the diaphragm back and forth to pump gas. By providing an annular diaphragm bracket and valve seat, and cooperating with the crankshaft and the connecting rod, a larger number of diaphragms can be assembled, improving the gas pumping rate of the diaphragm pump.

2. The diaphragm pump according to claim 1, wherein The housing is provided with an outer shell and an end cover. The outer shell is provided with an exhaust port, an end cover seat, a valve seat groove, and an exhaust limiting rib. The exhaust port is arranged at the top of the outer shell. The end cover seat is arranged inside the port of the outer shell. The valve seat groove is longitudinally arranged inside the outer shell. The exhaust limiting rib is arranged inside the top of the outer shell and is of a discontinuous annular structure. The end cover is provided with an end cover through hole, an end cover fixing hole, an end cover stud, and an end cover limiting rib.

3. The diaphragm pump according to claim 1, characterized in that, The crankshaft is provided with a driving end, a main journal, and a connecting rod journal. The crankshaft is assembled on the main journal hole of the shaft bracket through the main journal.

4. The connecting rod is of a star structure. The connecting rod is structurally provided with a connecting rod crankshaft hole, a piston, a connecting rod air hole, and a piston air hole. The connecting rod crankshaft hole is arranged at the center of the connecting rod. The piston is arranged at the branch end of each connecting rod. The connecting rod air hole is arranged in each branch of the connecting rod. The piston air hole is arranged at the center of the piston, and the connecting rod air hole communicates with the piston air hole. The connecting rod is assembled on the connecting rod journal of the crankshaft.

5. The diaphragm pump according to claim 1, wherein The air valve is a one-way air valve, provided with a valve body and a valve. The valve body is provided with a low-pressure air hole, a high-pressure air hole, and a bayonet. The valve is provided with a sealing hole and a snap head. The valve is fixed on the valve body through the snap head. The diaphragm pump nozzle passes through the sealing hole, and the inner diameter of the sealing hole is smaller than the outer diameter of the diaphragm pump nozzle.

6. The diaphragm pump according to claim 1, characterized in that, The diaphragm bracket is structurally provided with a diaphragm groove, a diaphragm cavity, and a shaft bracket positioning hole.

7. The diaphragm pump according to claim 1, characterized in that, The shaft bracket is provided with a main journal hole and a shaft bracket positioning bolt. The shaft bracket is positioned and assembled on the shaft bracket positioning hole inside the diaphragm bracket through the shaft bracket positioning bolt.

8. The diaphragm pump according to claim 1, wherein The diaphragm is structurally provided with a diaphragm frame connection end, a diaphragm sealing ring, a piston connection end, a bladder cavity, an intake diaphragm flap, and a diaphragm intake port. The diaphragm frame connection end is an integral part of the diaphragm. The diaphragm sealing ring is a circular sealing rib provided on the end face of the diaphragm frame connection end. The piston connection end and the bladder cavity are both arranged side by side and evenly distributed on the diaphragm frame connection end. The intake diaphragm flap and the diaphragm intake port are arranged between the bladder cavity and the piston connection end. The diaphragm piston connection end is sleeved on the piston of the connecting rod, and the diaphragm frame connection end is clamped in the diaphragm groove of the diaphragm frame.

9. The diaphragm pump according to claim 1, wherein The valve seat plate is structurally provided with a valve seat fixing groove, a valve flap groove, a valve flap fixing hole, and a valve seat exhaust hole. The valve seat fixing groove is provided on both sides of the valve seat plate. The valve flap groove, the valve flap fixing hole, and the valve seat exhaust hole are evenly distributed in the middle of the valve seat plate. The structure of the valve flap groove is a circular groove. The valve flap fixing hole is provided in the middle of the valve flap groove. The valve seat exhaust hole is provided in the valve flap groove and is annularly distributed around the valve flap fixing hole. The valve seat is sleeved on the outside of the diaphragm frame and is fixed on the valve seat groove of the housing through the fixing groove of the valve seat.

10. The diaphragm pump according to claim 1, characterized in that, The valve flap is provided with a flap and a snap head, and the snap head is fixed in the valve flap fixing hole provided on the valve seat.

11. The diaphragm pump according to claim 1, wherein, The motor is provided with an output shaft and a motor fixing hole, and the motor is connected and fixed to the connection plate through the motor fixing hole.

12. The diaphragm pump according to claim 1, characterized in that, The connector is provided with a coupling and a connection plate. The coupling is provided with a crankshaft connection end and a motor connection end. The crankshaft connection end is connected to the driving end of the crankshaft, and the motor connection end is connected to the output shaft of the motor. The connection plate is provided with a connection plate through hole, a pump body connection hole, and a motor connection hole. One side of the connection plate is connected and fixed to the pump body through the pump body connection hole, and the other side is connected and fixed to the motor through the motor connection hole.

Images