CN207111375U - A kind of electric diaphragm pump - Google Patents

Abstract

A kind of electric diaphragm pump is the utility model is related to, including：Fan blade (2), on the motor shaft (11) of motor (1) afterbody；The motor shaft (11) is in flat shape, is assembled with fan blade (2) internal diameter slight interference；Also include limit assembly, for limiting axial movement of the fan blade (2) on motor shaft.Relative to prior art, the utility model can realize effective radiating of electric diaphragm pump, prevent leak fluid from entering motor, damage motor, and simplify parts, reduce cost and simplify operation.

Description

A kind of electric diaphragm pump

Technical field

It the utility model is related to a kind of membrane pump, more particularly to a kind of electric diaphragm pump.

Background technology

Electric diaphragm pump is widely used to the industries such as water and wastewater industry, agricultural, medical treatment, automobile, ship, it include the pump housing, with The direct current generator of pump housing electrical connection.Electric diaphragm pump is often under high-pressure work state, and internal direct current generator is in running In can produce amount of heat, if aggregation heat can not shed in time, can cause direct current generator service behaviour decline, even result in Burn-down of electric motor.

In order to solve the above problems, researcher has made many improvement.As patent of invention CN101324225A discloses one Micro pump of the kind with heat abstractor, the patent sets the fan together rotated with rotating shaft in motor shaft front end, in motor casing Ventilating opening is set on wall, and caused heat is distributed to the external world by ventilating opening during by the operating of fan, direct current generator is operated.

And for example utility model patent CN203632468U is by installing preceding heat-dissipating impeller and rear radiating leaf at motor shaft two The gas flow rates inside electric machine casing are accelerated in wheel, the operating of former and later two impellers, realize radiating.

But the connected mode of the fan blade and rotating shaft in above-mentioned improvement is common assembly method, though there is gas channel, with Prolonged operating abrasion, the problem of being come off with rotating shaft occurs in fan, so as to cause radiating effect bad, reduces usability Energy.Meanwhile existing electric diaphragm pump sealing effectiveness is bad, occurs liquid in the pump housing course of work often and penetrate into motor, cause The phenomenon of burn-down of electric motor.

Utility model content

In view of the above problems, one side purpose of the present utility model is to provide a kind of good heat dissipation effect, and fan blade is fixed Firm electric diaphragm pump.

The purpose of the utility model another aspect is to provide a kind of good sealing effect, the good electric diaphragm pump of water resistance.

The purpose of the utility model another aspect is to provide a kind of simplified pressure regulation operation, assembles solid and reliable electronic barrier film Pump.

To achieve these goals, the technical solution of the utility model is：A kind of electric diaphragm pump, including：

Fan blade, on the motor shaft of motor afterbody；It is characterized in that：

The motor shaft is in flat shape, is assembled with fan blade internal diameter slight interference；

Also include limit assembly, for limiting axial movement of the fan blade on motor shaft.

Further, the limit assembly includes the first elastic bumps and described first on fan blade internal diameter inwall The locating slot on motor shaft that elastic bumps are adapted, the two coordinates the axial movement of limitation fan blade；Or limit assembly bag The first elastic bumps on motor shaft for include the locating slot on fan blade internal diameter inwall, being adapted with the locating slot, The two coordinates the axial movement of limitation fan blade.

Further, the limit assembly also includes the first boss being formed on motor shaft, and the first boss is located at Between fan blade and motor afterbody, prevent fan blade from being rotated relative to motor shaft.

Further, first elastic bumps are elastic bumps, are integrally formed with fan blade inwall.

Further, the electric diaphragm pump includes the pump housing positioned at motor front end, and the pump housing upper and lower side fixes pump cover, Extend outwardly to form baffle plate close to the pump housing rear end of the motor front end, to guide the stream of leak fluid between the pump housing and pump cover To.

Further, the baffle plate is integrally formed with pump housing rear end face, is formed at the surrounding of the pump housing rear end face, guiding Leak fluid flows out along baffle plate bearing of trend.

Further, the height of the baffle plate be higher than close to motor housing height.

Further, the pump housing front end is provided with pressure switch part, installs and protects between the pressure switch part and the pump housing Protecting assembly, the rear end face of the pressure switch part form the second raised, elastomer in the described second raised component with protection It is fastenedly connected.

Further, the elastomer is spring, and second projection is taken shape on the rear end cap of pressure switch part, institute The second projection is stated to be fitted snugly within the elastic cavity of the spring.

Further, the front end motor shaft of the motor is provided with pressing plate, and the pressing plate passes through mounting hole thereon and electricity Machine assembles, and is fixed by fastening assembly.

Further, the 3rd formation raised, with the 3rd male cooperation that the fastening assembly includes taking shape on pressing plate In the groove of motor front end face, or the fastening assembly includes the groove that takes shape on pressing plate, and corresponding with the groove Be formed at the 3rd raised of motor front end face.

Further, the fastening assembly also include being used to fasten connect between pressing plate and the motor front end face it is anti-loosening Screw.

Further, the electric diaphragm pump includes water inlet end, column built in water inlet end or taper filter screen, the filter screen Positive stop end is carried out spacing by the second boss for taking shape in water inlet end inner surface.

Further, the free end outer surface of the filter screen is provided with the positioning bar that limitation filter screen rocks.

Further, the positive stop end inner surface of the filter screen forms the inner web piece suitable for gripping.

Further, the motor is provided with motor casing, sets the first cover body between baffle plate and the motor front end face, and described first The cover cylinder of cover body is towards motor afterbody, the cover cylinder inwall fixing assembling of the motor casing and first cover body.

Further, the motor casing front end outer side forms pre-and post perforative duct, on the cover of first cover body Screwed hole is correspondingly provided with, cover cylinder inwall forms the duct groove being adapted with the duct, and screwed hole, duct groove, duct combination make Screw is obtained to be suitable to fix the first cover body and motor casing from screwed hole side or duct side.

Further, the motor casing front end outer side is also interval with rib, passes through the rib and first cover body The socket of cover cylinder inwall contact, gap between the motor casing and the first cover body forms the first air channel.

Further, outwards turnover forms flange for the motor casing front end.

Further, concave shape is faced out into the bar-shaped trough in axial direction extended, the bar shaped on the downside of the motor casing The partition being molded along motor casing inwall circumferencial direction is formed above groove end.

Further, the rubber stopper of close fitting is provided between the partition and bar-shaped trough, the rubber stopper is provided with front and rear pass through The through hole for being used for motor down-lead and passing through worn.

Further, the rubber stopper is made up of integrally formed upper rubber bodies, lower rubber bodies, and the upper rubber bodies are with Pre-and post perforative half slot is respectively provided with rubber bodies, upper and lower half slot correspondingly combines to form the through hole；Or the rubber stopper is Integrally formed block structure.

Further, the partition and/or bar-shaped trough are provided with back-off structure with respect to the side of rubber stopper, for fixing rubber Plug.

Further, the fan blade is located in motor casing, is provided between the motor afterbody and fan blade and is used to fix motor Electric machine support, motor, fan blade, electric machine support, motor casing are in concentric position after being assembled with realization.

Further, the electric machine support is enclosed by a plurality of longitudinal rib forms barrel cover shape, and the electric machine support is integrated note It is moulded into type or is formed by upper half support and lower half bracket assembled.

Further, the motor casing afterbody is provided with the second cover body, sets what is be horizontally mounted on the cover of second cover body Switch, and/or the socket of axially position, and/or the fairlead that power supply machine lead passes through.

Further, the switch is directly buckled into the corresponding mounting hole on the cover；The socket is consolidated by screw Due to directly buckled into the fairlead, or in the fairlead for lead pass and anchor leg buckle.

Further, the motor casing afterbody is provided with the switch being horizontally mounted, and/or the socket of axially position, and/or supplies The fairlead that motor down-lead passes through.

Further, the switch is directly buckled into the corresponding mounting hole of the motor casing afterbody；The socket passes through spiral shell Nail is fixed in the fairlead, or the buckle that simultaneously anchor leg is passed for lead is directly buckled into the fairlead.

Further, the motor casing afterbody is provided with heat emission hole, formed with the second air channel, the second cover between motor and motor casing Air inlet duct is set on the cover of body, first air channel is collectively forming heat dissipation channel with the second air channel, heat emission hole, air inlet duct.

Further, the drive end bearing bracket lower end of the pressure switch part is integrally formed with outlet baffle plate, the outlet baffle plate It is provided with the string holes passed for wire, the front end interior surface is provided with back-off, during assembling, wire is passed through by string holes, upset Outlet baffle plate is buckled into the back-off, to cover wire.

Compared with prior art, the utility model has the advantage of：Although conventional electric diaphragm pump also installs fan blade use additional In radiating, but the connected mode of fan blade and motor shaft is not firm enough, and radiating effect is bad；The utility model passes through in motor Groove is set on axle, the projection with matching grooves is set on fan blade inwall, and by the boss on motor shaft, realizes fan blade and electricity Machine is fastenedly connected；Integrally formed dividing plate is set in the rear end face of the pump housing, can effectively prevent the liquid of seepage between pump cover and the pump housing Direction of flow motor；First cover body is set between motor and the pump housing, the cover body can not only waterproof, and form air channel with electric machine casing, Beneficial to the circulation of gas, effectively radiating is realized；By by the elastic cavity immovable fitting of pressure switch part and spring, avoiding people For multiple pressure regulation operation, simplify structure while, extend the service life of the pump housing, while save cost；And filter screen energy Effectively filtered to flowing into the liquid in the pump housing, further extend the using effect and service life of the pump housing；In motor casing tail Portion, the second cover body being connected with motor casing afterbody cover on set switch, socket, buckle, further improve electric diaphragm pump Safe operation degree.

Brief description of the drawings

Fig. 1 is electric diaphragm pump Structure explosion diagram corresponding to one embodiment of the present utility model.

Fig. 2 (a) -2 (c) is the installation diagram of fan blade and motor.

Fig. 3 is the structural representation of the baffle plate of the pump housing.

Fig. 4 (a) -4 (b) is top view, the front view that the rear end cap of pressure switch part is combined with spring.

Fig. 5 (a) -5 (b) is the combination schematic diagram of pressing plate and motor.

Fig. 6 is the assembling structure schematic diagram of filter screen and filter screen.

Fig. 7 (a) -7 (c) is the assembly structure figure of the first cover body and motor casing.

Fig. 8 (a) -8 (c) is the combination schematic diagram of electric machine support and motor.

Fig. 9 is the combination schematic diagram of rubber stopper and motor casing.

Figure 10 (a) -10 (g) is switch, socket, the multiple combinations schematic diagram being buckled on electric diaphragm pump.

Figure 11 (a) -11 (b) is the structural representation of outlet baffle plate.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

Term " first ", " second " are only used for describing purpose, and it is not intended that the device or member of instruction or hint meaning Part must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.

As shown in figure 1, a kind of electric diaphragm pump of the present utility model includes motor 1, fan blade 2.With reference to Fig. 2 (a) -2 (c) It is shown, Fig. 2 (a) be illustrated that assembling fan blade after electric diaphragm pump complete diagram, Fig. 2 (b), 2 (c) separately shown motor with The combination of fan blade.The internal diameter inwall of fan blade 2 is provided with the first elastic bumps 21, and first elastic bumps 21 can be flexible；Electricity Locating slot 12 is correspondingly provided with the motor shaft 11 of the afterbody of machine 1, the first elastic bumps 21 coordinate with locating slot 12, on motor shaft 11 also Formed with first boss 13, the first boss 13 is located between fan blade 2 and the afterbody of motor 1.Motor shaft is in flat shape, can prevent wind Leaf and motor shaft relatively rotate, and this is shaped such that easy for installation, and fan blade directly is pressed into motor shaft；Elasticity on fan blade Projection is integrally formed with fan blade, and elastic bumps can prevent fan blade from moving axially with the locating slot on motor shaft and boss so that peace Fill simple and reliable.

Existing electric diaphragm pump realizes the sealing between the pump housing and motor frequently with packing ring, but effect is often bad, liquid Ooze out in gap that still can be between pump cover and the pump housing and flow directly into motor, cause motor to be damaged.The utility model is made to this Further improvement, referring specifically to Fig. 1,3.

As shown in Figure 1, electric diaphragm pump further comprises the pump housing 3, the pump cover 4 positioned at pump housing upper and lower side and positioned at pump cover Sealing ring 5 between 4 and the pump housing 3, the motor casing 6 positioned at the periphery of motor 1.As improved technology scheme of the present utility model, institute The pump housing rear end close to the front end of motor 1 for stating the pump housing 3 is extended outwardly formed with baffle plate 31, and the baffle plate 31 can be after the pump housing One whole circle of end face, and size is higher than other parts, is such as higher than the size of motor housing 6；Certainly, the baffle plate 31 and pump housing rear end face Directly it is integrally formed when can be and pass through injection.So not only specious, structure is reliable, at the same the baffle plate can guide pump cover with The direction outflow that the liquid of seepage extends towards baffle plate between the pump housing, flows out referring specifically to direction shown in arrow in Fig. 3, and anti-fluid stopping Enter motor, cause the damage of motor.

Electric diaphragm pump of the prior art sets screw, pad, spring generally between pressure switch part and the pump housing, leads to Adjustment screw is crossed to realize demand of the user to pump housing pressure value, but parts corresponding to this kind of frame mode are more, and installation is unstable It is fixed, easily cause pressure value and often change, and manually adjust screw, change spring pressure, to user's specialty through require compared with Height, once user turns screw because not professional enough by mistake, it may result in water pump damage.Thus, the utility model is to the click-through Improvement is gone, not only parts has been reduced, and often adjusted manually also without user, simplified operation, installed also more Firmly.

Specifically, referring to Fig. 1,4 (a), 4 (b), electric diaphragm pump shown in Fig. 1 includes pressure switch part 7, protection component 8, pressure switch part 7 includes rear end cap 71, drive end bearing bracket 72, switch contact 76, and protection component 8 includes the spring installed successively 81st, spring compressor 82, backflow circle 83, backflow pad 84, the one side of the relative protection component 8 of rear end cap 71, should formed with the second projection 711 Second projection 711 and the elastic cavity of spring 81 are combined closely.So, the spring pressure of protection device passes through fitted position and spring The uniformity of its own resilient controls, it is only necessary to ensure that protruding part may fitted to position with spring fastening assembling, and without debug, It is simple in construction, easy to operate, without manually adjusting spring pressure repeatedly to required value during test, it also avoid user and be ignorant of Maloperation, cause to protect the too low of pressure tune or raise and damage water pump.The specifically top view as shown in Fig. 4 (a), 4 (b), master Content shown in view, when water outlet is closed, because water can nowhere be let out, hydraulic pressure constantly raises, and because hydraulic pressure raises, makes backflow pad 84 Deformation, push the spring cap 82 overcome the elastic force of spring 81 go upward to promote microswitch switch contact 76, loop of cutting off the electricity supply, Make water pump self-stopping, when water outlet is opened, spring force is more than the power of hydraulic pressure, resets above-mentioned part, power supply turn on automatically, Water pump normal work, by the setting of spring force value, control Guan Shuihou, the operating pressure of autostop.

Electric diaphragm pump can produce shake in use, not fastened if being connected between part, then it is possible that portion The problem of part releases, so, the utility model technical scheme as a further improvement, by the pressing plate of motor front end and motor Front end motor shaft is assembled by fastening assembly, and as shown in Fig. 1, Fig. 5 (a) -5 (b), electric diaphragm pump includes being located at motor 1 The pressing plate 9 of front end, while pressing plate 9 is assembled by centre bore 91 and motor 1, the 3rd projection 92, motor 1 are set also on pressing plate Front end face sets groove 15, and pressing plate and electricity are realized by the 3rd projection 92 and the elastic conjunction of groove 15, and by loose-proof screw 93 The fastening of machine, such pump housing at work, pressing plate stress and vibration after will not loosen, ensure water pump will not because pressing plate loosen and wink Between decompression or low pressure, cause flow to diminish, also further reduce vibrating noise.

As further improvement of the utility model, as a shown in Figure 6, filter screen is set up in the water inlet of electric diaphragm pump 10, filter screen is in cone-shaped, and water inlet inwall is provided with second boss 111, and the positive stop end 101 of filter screen 10 is carried out by second boss 111 Spacing, the periphery of free end 102 is provided with the positioning bar 103 that limitation filter screen rocks, and the inner surface of positive stop end 101, which is formed, is suitable to gripping Inner web piece 104.Boss is set up in water inlet inner surface, when installing filter screen additional, somewhat filter screen can firmly need to only be loaded, boss The axial location of filter screen is limited, radial positioning is positioned by the inner headed face of the cylindrical and water inlet of filter screen porch, the filter screen other end Outer round surface positioning bar is set, positioning can be ensured with as few as possible positioning bar, while minimum is accomplished in the stop to water, and interior If inner web piece make it that dismounting is more convenient, cleaning is simpler, and the structure provides protection for water pump, ensure that normally making for pump With.

In order to further strengthen waterproof effect and result of ventilating heat dissipation between motor and the pump housing, as shown in Fig. 7 (a) -7 (c), It is provided with the first cover body 120 between baffle plate 31 and the front end face of motor 1, the cover cylinder of first cover body 120 is towards the afterbody of motor 1, fan blade 2 In motor casing 6, the front end outer side of motor casing 6 is interval with rib 61, passes through the contact set of 61 and first cover body of rib 120 Connect, and the gap between the cover body 120 of motor casing 6 and first forms the first air channel 130, as shown in arrow in Fig. 7 (b).Further, The front end outer side of motor casing 6 forms pre-and post perforative duct 62, and the cover of the first cover body 120 is provided with what is be adapted with duct 62 Screwed hole 121, the cover cylinder inwall of the first cover body 120 formed with the duct groove 122 suitable for accommodating duct 62, screwed hole, duct groove, Duct, which combines, causes screw both can also fix the first cover body and motor casing from duct side from screwed hole side；Certainly, in order to Further waterproof, motor casing front end can outwards be turned down and form flange design.Before first cover body is realized after being assembled with motor casing Wind is brought out, while prevents water to be splashed into motor, the flange of motor casing front end is related to, and when there can be water on motor casing surface, prevents down Flow into motor.

As further improvement of the utility model, the electricity for being used for fixing motor 1 is provided between the afterbody of motor 1 and fan blade 2 Machine support 140, fan blade 2 are located in motor casing, and electric machine support 140 is enclosed by a plurality of longitudinal rib and forms barrel cover shape, is worth mentioning It is that electric machine support 140 can be combined and formed by upper half support 141 and lower half support 142.The longitudinal rib of electric machine support ensure that logical Wind area is big, and small, the assembling mode of use each half up and down so that after assembling while motor is encased is influenceed on ventilation and heat Again encased by motor casing, be stuck between motor and motor casing, while being played a supporting role to motor afterbody, make motor, Fan blade, electric machine support, motor casing are in concentric position all the time, can effectively prevent fan blade from encountering the periphery of motor casing, Simultaneously the motor down-lead after assembling is enclosed in electric machine support, ensures that fan blade will not encounter lead.

In order to more preferably realize sealing, ensure that the electric wire in electric diaphragm pump draws orderly, raising degree of safety, as an improvement, The downside of motor casing 6 faces out concave shape and formed into the bar-shaped trough 63 in axial direction extended, the end of bar-shaped trough 63 top along electricity The partition 64 of the inwall circumferencial direction of casing 6 shaping；Close-fitting rubber stopper 150, the rubber are laid between partition 64 and bar-shaped trough 63 Plug 150 is provided with the pre-and post perforative through hole 151 passed through for motor down-lead.Certainly, the rubber stopper 150 can be by one The upper rubber bodies 152 and lower rubber bodies 153 of shaping are formed, and upper rubber bodies 152 are pre-and post perforative with being respectively provided with lower rubber bodies 153 Half slot, upper and lower half slot correspondingly combine to form the through hole 151.In order to prevent rubber stopper because motor work caused by shake and Come off, as an improvement, back-off structure 154 is provided with respect to the side of rubber stopper 150 in partition 64, can also be simultaneously or only in bar Shape groove sets back-off structure 154 with respect to the side of rubber stopper, for blocking rubber stopper, realizes further fixed.

As an improvement, the afterbody of motor casing 6 of the present embodiment is provided with the second cover body 16, consolidated by screw and the afterbody of motor casing 6 Fixed connection.The cover of second cover body 16 is provided with the switch 161 being horizontally mounted, and the switch 161 directly buckles into corresponding on cover Kong Zhong；Certainly, the socket 162 of axially position can be also provided with the cover of the second cover body 16, the socket is fixed by screw；Together Sample, socket being also not provided with the cover of the second cover body 16, and setting the fairlead that power supply machine lead passes through, use is set in the fairlead In the buckle 163 of anchor leg, the fairlead and socket putting hole are general, and buckle can be buckled into directly in fairlead.As needed, The combination of the various ways such as switch, socket, buckle can be realized, so as to save cost.

Socket is fixed by screw, and the buckle for anchor leg is provided with fairlead.

It is noted that can also in first cover body, in the case of the second cover body and fan blade, air channel, in motor casing Afterbody sets the switch being horizontally mounted, and/or the socket of axially position, and/or the fairlead that power supply machine lead passes through；Can also be The direct outlet in the case where having fan blade, air channel, the first cover body, no second cover body.

Certainly, in order to preferably radiate, heat emission hole can be set in the afterbody of motor casing 6, the afterbody of the second cover body 16 sets air inlet duct, electricity The second air channel 200 is formed between machine 1 and motor casing 6, as shown in Fig. 7 (b).First air channel 130, the second air channel 200, heat emission hole and enter Air channel is collectively forming heat dissipation channel, beneficial to motor radiating.

Further, the lower end of drive end bearing bracket 72 of pressure switch part 7 is integrally formed with outlet baffle plate 73, on outlet baffle plate 73 Provided with the string holes 74 passed for wire, the inner surface of drive end bearing bracket 72 is provided with back-off 75, and during assembling, wire is passed through by string holes 74, Upset outlet baffle plate 73 is buckled into back-off 75 to cover wire.

In addition to above-mentioned improvement, other similar improvement are also contained in improvement threshold of the present utility model, herein Do not repeating.

While there has been shown and described that embodiment of the present utility model, it will be appreciated by those skilled in the art that：Do not taking off These embodiments can be carried out with a variety of changes, modification in the case of from principle of the present utility model and objective, replace and deform, The scope of the utility model is limited by claim and its equivalent.

Claims (11)

1. a kind of electric diaphragm pump, including：Motor (1), positioned at motor (1) front end and the coupled pump housing (3), located at motor (1) fan blade (2) on afterbody motor shaft (11), it is characterised in that：

The motor shaft (11) is in flat shape, is assembled with fan blade (2) internal diameter slight interference；Set on fan blade (2) the internal diameter inwall First elastic bumps (21), motor shaft (11) are provided with the locating slot (12) being adapted with first elastic bumps (21), position First boss (13) between locating slot (12) and motor (1) afterbody, the first boss (13), locating slot (12), the first bullet Property raised (21) coordinate axial movement of limitation fan blade (2) jointly.

2. electric diaphragm pump according to claim 1, it is characterised in that：The pump housing (3) upper and lower side fixes pump cover (4), Face out to extend around to form baffle plate (31) close to the pump housing (3) rear end of the motor (1) front end, to guide the pump housing (3) and pump Leak fluid flows out along baffle plate (31) bearing of trend between covering (4).

3. electric diaphragm pump according to claim 2, it is characterised in that：The pump housing (3) front end is provided with pressure switch portion Part (7), the rear end cap (71) of the pressure switch part (7) forms second raised (711) with respect to the side of the pump housing (3), described Assemble spring (81), spring compressor (82), backflow circle (83), backflow pad (84) between rear end cap (71) and the pump housing (3) successively, described the Two raised (711) are fitted snugly within the elastic cavity of spring (81).

4. electric diaphragm pump according to claim 3, it is characterised in that：On the front end motor shaft (14) of the motor (1) Provided with pressing plate (9), the pressing plate (9) is fixed by loose-proof screw (93) and motor (1), and the is also formed on the pressing plate (9) Three raised (92), motor (1) front end face are correspondingly formed groove (15), the groove (15) and the 3rd raised (92) elastic conjunction with Clam member (9) and motor (1).

5. electric diaphragm pump according to claim 4, it is characterised in that：The electric diaphragm pump includes water inlet end, water inlet Column built in end or taper filter screen (10), the positive stop end (101) of the filter screen (10) is by taking shape in the second of water inlet end inner surface Boss (111) progress is spacing, and free end (102) outer surface of the filter screen (10) is provided with the positioning that limitation filter screen (10) rocks Muscle (103), positive stop end (101) inner surface of the filter screen (10) form the inner web piece (104) suitable for gripping.

6. electric diaphragm pump according to claim 5, it is characterised in that：Between the baffle plate (31) and motor (1) front end face If the first cover body (120), the cover cylinder of first cover body (120) is arranged motor casing towards motor (1) afterbody, the motor (1) (6), the motor casing (6) and the cover cylinder inwall fixing assembling of the first cover body (120), motor casing (6) front end outwards turns down Form flange；Motor casing (6) front end outer side is interval with rib (61), is easy to motor casing (6) and first cover body (120) the first air channel (130) for being suitable to gas circulation is formed between inwall.

7. electric diaphragm pump according to claim 6, it is characterised in that：Before motor casing (6) front end outer side forms The duct (62) run through afterwards, is correspondingly provided with screwed hole (121) on the cover of first cover body (120), cover cylinder inwall formed with The duct groove (122) that the duct (62) is adapted, screwed hole (121), duct groove (122), duct (62), which combine, causes screw Suitable for fixing the first cover body (120) and motor casing (6) from screwed hole side or duct side, faced out on the downside of the motor casing (6) recessed It is sunken to form the bar-shaped trough (63) for being used to lay lead in axial direction extended, formed above bar-shaped trough (63) end along electricity The partition (64) of casing (6) inwall circumferencial direction shaping, the rubber of close fitting is provided between the partition (64) and bar-shaped trough (63) Plug (150), the rubber stopper (150) are provided with the through hole (151) passed through for lead.

8. electric diaphragm pump according to claim 7, it is characterised in that：The fan blade (2) is located in motor casing (6), institute State the electric machine support (140) for being provided between motor (1) afterbody and fan blade (2) and being used for fixing motor (1), the electric machine support (140) Upper half support (141) and lower half support (142) assembling formed by being enclosed by a plurality of longitudinal rib is formed, to realize motor after assembling (1), fan blade (2), electric machine support (140), motor casing (6) are in concentric position.

9. electric diaphragm pump according to claim 8, it is characterised in that：Motor casing (6) afterbody is provided with the second cover body (16) switch (161) being horizontally mounted, and/or fairlead, are set on the cover of second cover body (16), is fitted in the fairlead In assembling axially position socket (162) or directly buckle into for lead pass simultaneously anchor leg buckle (163), the rubber stopper (150) it is made up of integrally formed upper rubber bodies (152), lower rubber bodies (153), the upper rubber bodies (152) and lower rubber bodies (153) pre-and post perforative half slot is respectively provided with, upper and lower half slot correspondingly combines to form the through hole (151), the partition (64) and/or bar-shaped trough (63) is provided with back-off structure (154) with respect to the side of rubber stopper (150), for fixing rubber stopper (150)。

10. electric diaphragm pump according to claim 9, it is characterised in that：Motor casing (6) afterbody is provided with heat emission hole, Formed with the second air channel (200) between motor and motor casing, air inlet duct, first air channel are set on the cover of the second cover body (16) (130) it is collectively forming heat dissipation channel with the second air channel (200), heat emission hole, air inlet duct.

11. electric diaphragm pump according to claim 10, it is characterised in that：The drive end bearing bracket of the pressure switch part (7) (72) lower end is provided with the string holes (74) passed for wire, institute integrally formed with outlet baffle plate (73), the outlet baffle plate (73) State drive end bearing bracket (72) inner surface and be provided with back-off (75), during assembling, wire is passed through by string holes (74), upset outlet baffle plate (73) button Enter in the back-off (75), to cover wire.