CN207437313U - Diaphragm pump - Google Patents

Abstract

The utility model discloses a kind of diaphragm pump, including：The pump housing, water inlet valve block, diaphragm unit and piston component.Piston component is connected to the bottom of valve seat, and piston component includes the utricule with blister cavities, and blister cavities is connected by lower inlet opening and upper water-out hole with intake antrum and water chamber respectively, and the bottom surface of cylinder body has been downwardly extending stop bit part；Link assembly, link assembly drive utricule to swing up and down to squeeze or stretch the function that blister cavities realizes pumped fluid between upper movement stop and lower movement stop, and link assembly includes：Connecting rod, connecting rod are connected with utricule, and the lower face of stop bit part is opposite with the center of connecting rod top surface and is spaced a predetermined distance.Diaphragm pump according to the present utility model, by being downwardly extending stop bit part in the bottom surface of cylinder body, the lower face of stop bit part is opposite with the center of connecting rod top surface and is spaced a predetermined distance, effectively prevent the phenomenon that connecting rod upward vibration occur during connecting rod band piston operation so that the output flow of diaphragm pump is stablized.

Description

Diaphragm pump

Technical field

The utility model belongs to pump technical field, and in particular to a kind of diaphragm pump.

Background technology

In correlation technique, the instability of flow of diaphragm pump.

Utility model content

The utility model is intended to solve one of above-mentioned technical problem at least to a certain extent.

For this purpose, the utility model proposes a kind of diaphragm pump, the stability of flow of the diaphragm pump, delivery efficiency height.

Diaphragm pump according to the present utility model, including：The pump housing, the pump housing include sequentially connected upper cover, valve seat and cylinder Body, the valve seat have lower inlet opening and a upper water-out hole, the upper cover and the valve seat structure set out mutually independent intake antrum and Water chamber, the lower inlet opening are connected with the intake antrum, and the upper water-out hole is connected with the water chamber；Water inlet valve block, institute It states into water valve block and is used to open or closes the lower inlet opening arranged on the bottom surface of the valve seat；Diaphragm unit, the diaphragm unit The upper water-out hole is used to open or closed arranged on the top surface of the valve seat；Piston component, the piston component are connected to described The bottom of valve seat, the piston component include with blister cavities utricule, the blister cavities by the lower inlet opening and it is described on go out Water hole connects respectively with the intake antrum and the water chamber, and the bottom surface of the cylinder body has been downwardly extending stop bit part；Connecting rod Component, the link assembly drive the utricule to swing up and down to squeeze or stretch between upper movement stop and lower movement stop The blister cavities realizes the function of pumped fluid, and the link assembly includes：Connecting rod, the connecting rod is connected with the utricule, described The lower face of stop bit part is opposite with the center of connecting rod top surface and is spaced a predetermined distance.

Diaphragm pump according to the present utility model, by being downwardly extending stop bit part in the bottom surface of cylinder body, under stop bit part End face is opposite with the center of connecting rod top surface and is spaced a predetermined distance, and effectively prevents connecting during connecting rod band piston operation The phenomenon that bar upward vibration so that the output flow of diaphragm pump is stablized.

In addition, according to the utility model diaphragm pump, there can also be following additional technical characteristic：

Some embodiments according to the present utility model, the lower face of the stop bit part and the center of the connecting rod top surface 0.1-0.4 millimeters of interval.

Some embodiments according to the present utility model, the stop bit part are stop bit column, and the length of the stop bit column is 1-3 millis Rice.

Some embodiments according to the present utility model, the utricule include：Multiple blister cavities, multiple blister cavities open upwards It opens；Tablet, the tablet are connected to the upper end edge of multiple blister cavities, so as to which multiple blister cavities be connected to form one；Peace Column is filled, the mounting post is connected to the bottom of the blister cavities, and the connecting rod has the second mounting hole with mounting post cooperation.

Some embodiments according to the present utility model, the blister cavities include：Thinner wall section, the upper end of the mounting post with it is described The bottom surface connection of thinner wall section；Thick wall portion, the lower end week of the thick wall portion are connected along with the upper end of thinner wall section week edge, the thickness The upper end week edge of wall portion is connected with the bottom surface of the tablet.

Some embodiments according to the present utility model, the wall thickness of the thick wall portion are more than 0.2 milli of wall thickness of the thinner wall section Rice.

Some embodiments according to the present utility model, the wall thickness of the thinner wall section is between 0.3-0.6 millimeter.

Some embodiments according to the present utility model, the top surface of the cylinder body, which upwardly extends, is formed with the second positioning column, institute It states tablet and is equipped with the second location hole coordinated with second positioning column.

Some embodiments according to the present utility model, the radial dimension of second positioning column are more than second location hole Radial dimension.

Some embodiments according to the present utility model, the cylinder body have the first mounting hole, and the utricule falls into described the In one mounting hole, the outer diameter of the thick wall portion is more than the internal diameter of first mounting hole.

Some embodiments according to the present utility model, the diaphragm pump further include：Drive component, the driving component include Pedestal and motor, the pump housing are connected to pedestal and set out chamber with structure, and the motor has motor shaft；Link assembly, the company It is arranged in bar assembly in chamber, the link assembly has eccentric wheel and steel shaft, and the motor shaft is connected with eccentric wheel；Photoelectricity hides Catch, the photoelectricity shielding plate are integrally formed at the eccentric wheel, the photoelectricity shielding plate and the eccentric wheel and the motor Axis rotates synchronously；Photoelectric sensor, the photoelectric sensor are arranged at the pedestal, and the photoelectric sensor hides with the photoelectricity Detection signal is sent to electric machine controller, the electric machine controller by catch cooperation for detecting the rotating speed of the motor shaft According to the rotating speed of the motor shaft of detection signals-modulating motor.

The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description In become apparent or recognized by the practice of the utility model.

Description of the drawings

The additional aspect and advantage of the utility model will be apparent in the description from combination accompanying drawings below to embodiment Be readily appreciated that, wherein：

Fig. 1 is the partial sectional view according to the diaphragm pump of the utility model one embodiment；

Fig. 2 is the exploded view according to the diaphragm pump of the utility model one embodiment；

Fig. 3 is the partial sectional view according to the diaphragm pump of the utility model one embodiment；

Fig. 4 is the stereogram according to the cylinder body of the utility model one embodiment；

Fig. 5 is the stereogram according to the cylinder body of the utility model one embodiment；

Fig. 6 is the stereogram according to the utricule of the utility model one embodiment；

Fig. 7 is the stereogram according to the utricule of the utility model one embodiment.

Reference numeral：

Diaphragm pump 100；

Drive component 10；Pedestal 11；Motor 12；Motor shaft 121；

The pump housing 20；

Water chamber 211；Intake antrum 212；

Upper cover 22；Upper annular partition 223；Water inlet pipe 224；Outlet pipe 225；

Valve seat 23；Lower annular partition 232；Upper water-out hole 235；Lower inlet opening 236；

Cylinder body 24；Stop bit part 241；Second positioning column 242；First mounting hole 243；

Diaphragm unit 25；

Water inlet valve block 26；

Link assembly 30；Connecting rod 31；Second mounting hole 311；Steel shaft 32；Eccentric wheel 33；Eccentric orfice 331；

Photoelectricity shielding plate 40；Angling hole 41；

Photoelectric sensor 50；

Piston component 90；Utricule 91；Tablet 911；Second location hole 9110；Blister cavities 912；Thick wall portion 913；Thinner wall section 914； Mounting post 915.

Specific embodiment

The embodiment of the utility model is described below in detail, the example of embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the utility model, and it is not intended that limit to the utility model System.

Referring to Fig. 1-Fig. 7 descriptions according to the diaphragm pump 100 of the utility model embodiment.The diaphragm pump 100 can answer For in coffee machine or fruit juice mixer, being pumped by the diaphragm pump 100 to coffee machine or fruit juice mixer.The diaphragm pump 100 can also answer For in sphygmomanometer, automotive seat or massage armchair, by the diaphragm pump 100 to sphygmomanometer, automotive seat or massage armchair inflation/deflation. It is understood that above-mentioned be only illustrative, it is not the limitation to scope of protection of the utility model, the utility model is implemented The diaphragm pump 100 of example can be widely applied to Medical Devices and family's electro-technical field.

Can substantially it be included according to the diaphragm pump 100 of the utility model embodiment：The pump housing 20, drive component 10, connection rod set Part 30, photoelectricity shielding plate 40 and photoelectric sensor 50.Wherein, drive component 10 can include pedestal 11 and set to the electricity of pedestal 11 Machine 12.

Specifically, as shown in Fig. 1 and Fig. 2 and Fig. 3, the pump housing 20 can include sequentially connected upper cover 22,23 and of valve seat Cylinder body 24, wherein, water inlet pipe 224 of the upper cover 22 with water inlet and the outlet pipe with water outlet 225, the bottom of upper cover 22 to Upper recess forms the first groove, and the first groove is separated into upper external groove and upper inner groovy by upper annular partition 223.Valve seat 23 Upper table corresponding second groove of the first grooves of concave shape Cheng Youyu downwards, the second groove by with upper 223 phase of annular partition Corresponding lower annular partition 232 is separated into lower external groove and lower inner groovy.Upper cover 22 is seal-installed on valve seat 23, and on passing through Annular partition 223 and lower annular partition 232 are separated into the intake antrum 212 positioned at outside and the water chamber 211 positioned inside, In, intake antrum 212 is communicated with water inlet, and water chamber 211 is communicated with water outlet.

As shown in Figure 1, Figure 2 and Fig. 3, valve seat 23 is equipped with multigroup upper water-out hole 235 and multigroup lower inlet opening 236, under valve seat 23 The position that surface corresponds to inlet opening 236 under every group is equipped with the water inlet valve block 26 for being used to open or closing lower inlet opening 236, such as Umbrella valve, the upper surface of valve seat 23 correspond to the position in upper water-out hole 235 equipped with the film for being used to open or closing upper water-out hole 235 Piece component 25.

Cylinder body 24 is connected to valve seat 23 and pedestal 11, and cylinder body 24 is formed with multiple first mounting holes 243.For pumping The piston component 90 of fluid is installed on cylinder body 24, and piston component 90 has multiple utricules 91 and for connecting multiple utricules 91 Tablet 911, each utricule 91 are each fallen in the first mounting hole 243.Each utricule 91 includes blister cavities 912 and mounting post 915, capsule 912 open upper end of chamber, the upper end periphery of tablet 911 and each blister cavities 912 connect to form one, the lower end of blister cavities 912 with The upper end connection of mounting post 915.Each blister cavities 912, which passes through the first mounting hole 243 and passes through tablet 911, is attached at the upper of cylinder body 24 Surface, the pressure of valve seat 23 are arranged on tablet 911 piston component 90 being clamped between valve seat 23 and pedestal 11.

Link assembly 30 is connected to the motor shaft 121 of motor 12 and mounting post 915, in this way, 12 rotation process of motor When, by link assembly 30 utricule 91 is driven to swing up and down, compress and expand blister cavities 912, realize the process of pumped fluid.

It can be mutually clamped between upper cover 22 and valve seat 23, between valve seat 23 and cylinder body 24, between cylinder body 24 and pedestal 11 And then form one by multiple clamp connections.Wherein, the pump housing 20 can be square frame or cylindrical framework.

In the diaphragm pump 100 of some embodiments of the utility model, as shown in Figure 1, Figure 2 and Figure 3, diaphragm pump 100 includes： The pump housing 20, water inlet valve block 26, diaphragm unit 25, piston component 90 and link assembly 30.The pump housing 20 includes sequentially connected upper cover 22nd, valve seat 23 and cylinder body 24, valve seat 23 have lower inlet opening 236 and upper water-out hole 235, and upper cover 22 and 23 structure of valve seat are set out mutually Independent intake antrum 212 and water chamber 211, lower inlet opening 236 are connected with intake antrum 212, upper water-out hole 235 and water chamber 211 Connection.The bottom surface that water inlet valve block 26 is arranged on valve seat 23 is used to open or closes lower inlet opening 236, and diaphragm unit 25 is arranged on valve seat 23 Top surface be used to open or close upper water-out hole 235.

Further, with reference to Fig. 2 and Fig. 5, piston component 90 is connected to the bottom of valve seat 23, and piston component 90 includes having The utricule 91 of blister cavities 912, blister cavities 912 by lower inlet opening 236 and upper water-out hole 235 respectively with intake antrum 212 and water chamber 211 Connection, the bottom surface of cylinder body 24 has been downwardly extending stop bit part 241.

Link assembly 30 drives utricule 91 to swing up and down to squeeze or stretch between upper movement stop and lower movement stop Blister cavities 912 realizes the function of pumped fluid, and link assembly 30 includes：Connecting rod 31, connecting rod 31 are connected with utricule 91, stop bit part 241 Lower face it is opposite with the center of 31 top surface of connecting rod and be spaced a predetermined distance.

Specifically, link assembly 30 drives utricule 91 to move, when blister cavities 912 is compressed by link assembly 30, inlet valve Piece 26 closes lower inlet opening 236, and diaphragm unit 25 opens upper water-out hole 235, and the fluid in blister cavities 912 passes through upper water-out hole 235 Into in water chamber 211；When blister cavities 912 stretches expansion by link assembly 30, water inlet valve block 26 opens lower inlet opening 236, film Piece component 25 closes upper water-out hole 235, the fluid in intake antrum 212 through lower inlet opening 236 into blister cavities 912 in.

During the up and down motion of connecting rod 31, due to the presence of stop bit part 241, effectively prevent connecting rod 31 and drive utricule 91 Occur the phenomenon that 31 upward vibration of connecting rod causes flow unstable during operation, so also achieved the purpose that accurate control flow.

As a result, according to the diaphragm pump 100 of the utility model embodiment, by being downwardly extending only in the bottom surface of cylinder body 24 Position part 241, the lower face of stop bit part 241 is opposite with the center of 31 top surface of connecting rod and is spaced a predetermined distance so that diaphragm pump 100 output flow is stablized.

In some embodiments of the utility model, such as Fig. 3, the lower face of stop bit part 241 and the center of 31 top surface of connecting rod 0.1-0.4 millimeters of location interval.That is, the distance that connecting rod 31 moves upwards is between 0.1-0.4 millimeters, in other words, 31 upward 912 motion amplitude of blister cavities of connecting rod is 0.1-0.4 millimeters.In other words, under the top surface of connecting rod 31 and stop bit part 241 End face is spaced apart always, wherein, the lower face of stop bit part 241 is the upper movement dead-centre position of connecting rod 31, in connecting rod 31 When touching the lower face of stop bit part 241, connecting rod 31 is just restricted from continuing up, in this manner it is ensured that connecting rod 31 Per second compression or the body decrement of stretching blister cavities 912 is essentially identical so that the stability of flow that diaphragm pump 100 pumps.

In alternative embodiment, such as Fig. 5, stop bit part 241 is stop bit column, and the length of stop bit column is 1-3 millimeters, above-described embodiment It is only illustrative, is not the restriction to scope of protection of the utility model.It is understood that the length of stop bit column can root According to diaphragm pump 100 water flow different designs into difference.

In some embodiments of the utility model, with reference to Fig. 6 and Fig. 7, utricule 91 includes：Multiple blister cavities 912, tablet 911 and mounting post 915.Multiple blister cavities 912 are open upwards.Tablet 911 is connected to the upper end edge of multiple blister cavities 912, so as to will be more A blister cavities 912 is connected to form one.Blister cavities 912 is connected as one so that utricule 91 is processed simply by tablet 911, installation is high Effect, it is time saving and energy saving.

And connected each other since utricule 91 is squeezed with stretching frequency height, multiple blister cavities 912 of integrally formed utricule 91, So that utricule 91 has higher fatigue resistance.

Wherein, mounting post 915 is connected to the bottom of blister cavities 912, and connecting rod 31 has the second installation coordinated with mounting post 915 Hole 311.Mounting post 915 is attached through the second mounting hole 311 with connecting rod 31, wherein, the radial dimension of mounting post 915 is more than The radial dimension of second mounting hole 311 in this way, connecting rod 31 will drive utricule 91 during the motion, realizes the drawing of utricule 91 It stretches or compresses.

In some embodiments of the utility model, with reference to Fig. 7, blister cavities 912 includes：Thinner wall section 914 and thick wall portion 913. The upper end of mounting post 915 is connected with the bottom surface of thinner wall section 914.The all upper end week edges along with thinner wall section 914 in the lower end of thick wall portion 913 Connection, the upper end week edge of thick wall portion 913 are connected with the bottom surface of tablet 911.It is understood that thinner wall section 914 and mounting post 915 Be connected, mounting post 915 by drive thinner wall section 914 move, need at this time thinner wall section 914 have it is good elasticity and telescopicing performance with Realize the stretching and compression of utricule 91, it is well known that within the specific limits, thinner object has preferably elasticity, therefore will The part being connected with mounting post 915 is set to thinner wall section 914.Opposite, the upper end of thick wall portion 913 is connected with tablet 911, it is necessary to thick Wall portion 913 overhangs blister cavities 912, and thick wall portion 913 both plays the role of strong fix, also ensures that diaphragm pump 100 is being run Be not in the phenomenon that 913 torsional deformation of thick wall portion even shifts in the process.

In some alternative embodiments, the wall thickness of thick wall portion 913 is more than 0.2 millimeter of the wall thickness of thinner wall section 914.Thick wall portion 913 Lower end be connected with the upper end of thinner wall section 914, the wall thickness variation between thick wall portion 913 and thinner wall section 914 should not be too large, so thick Transition that can be gentle between wall portion 913 and thinner wall section 914.As a result, blister cavities 912 has better stability, and keep Good deformability, so that diaphragm pump 100 has stable water flow.

In further optional example, the wall thickness of thinner wall section 914 is between 0.3-0.6 millimeter.Above-described embodiment is only signal Property, it is not the restriction to scope of protection of the utility model.It is understood that the wall thickness of thinner wall section 914 can according to every The different designs of the water flow of membrane pump 100 are into difference.

In a specific embodiment of the utility model, cylinder body 24 has the first mounting hole 243, and utricule 91 falls into first In mounting hole 243, the outer diameter of thick wall portion 913 is more than the internal diameter of the first mounting hole 243.

In other alternative embodiments of the utility model, as shown in figure 4, the top surface of cylinder body 24 is upwardly extended and is formed with Second positioning column 242, tablet 911 are equipped with the second location hole 9110 with the cooperation of the second positioning column 242.

In a specific embodiment of the utility model, the radial dimension of the second positioning column 242 is more than the second location hole 9110 radial dimension.

That is, thick wall portion 913 is interference fitted with the first mounting hole 243, position relationship is stablized each other, in addition, cylinder body The second positioning column 242 on 24 is connected through the second location hole 9110 with utricule 91, will not cause showing for the installation offset of utricule 91 As, wherein, it is interference fitted, is also ensured between utricule 91 and cylinder body 24 between the second positioning column 242 and the second location hole 9110 The stability of connection.

In some embodiments of the utility model, as shown in figures 1 and 3, link assembly 30 is built in chamber 27, even Bar assembly 30 includes：Eccentric wheel 33, connecting rod 31 and steel shaft 32.33 axial direction of eccentric wheel is provided with inclined eccentric orfice 312.Partially Heart wheel 33 is connected with the motor shaft 121 of motor 12.

As shown in Figure 1, photoelectricity shielding plate 40 is integrally formed at eccentric wheel 33, that is to say, that photoelectricity shielding plate 40 and bias Wheel 33 is an entirety, indivisible, thus, it is possible to simplify the manufacturing process of eccentric wheel 33, has compressed number of assembling steps, and The phenomenon that photoelectricity shielding plate 40 is avoided to occur trembling or even come off.

In alternative embodiment, as shown in Figure 1, photoelectricity shielding plate 40 is integrally formed at eccentric wheel 33, photoelectricity shielding plate 40 with Eccentric wheel 33 rotates synchronously.Wherein, photoelectricity shielding plate 40 is set to the upper surface of eccentric wheel 33, photoelectricity shielding plate 40 can be equipped with The 331 corresponding angling hole 41 of eccentric orfice of eccentric wheel 33, one end of steel shaft 32 are inserted into angling hole 41 and eccentric orfice 331, steel The other end of axis 32 is connected with connecting rod 31.

Photoelectric sensor 50 is set to pedestal 11, and photoelectric sensor 50 coordinates to detect motor shaft with photoelectricity shielding plate 40 121 rotating speed, and detection signal is sent to electric machine controller, electric machine controller is according to the motor for detecting signals-modulating motor 12 The rotating speed of axis 121.

As shown in Fig. 1 combinations Fig. 3, photoelectric sensor 50 is arranged in chamber 27, and is formed with edge on photoelectric sensor 50 The straight slot of the rotatable lamella perforation of photoelectricity shielding plate 40, by the straight slot when photoelectricity shielding plate 40 rotates, so as to detect motor shaft 121 Rotating speed, and by detection signal pass to electric machine controller, in order to electric machine controller accurately control motor shaft 121 turn Speed.

According to the diaphragm pump 100 of the utility model embodiment, by the way that photoelectricity shielding plate 40 is integrally formed at the bias Wheel 33, improves stability of the photoelectricity shielding plate 40 in rotation process, and reduces work noise and the production of diaphragm pump 100 Cost.

In alternative embodiment, as shown in Figure 1, the extending radially outwardly along eccentric wheel 33 of photoelectricity shielding plate 40.Photoelectric sensing Device 50 is arranged at the internal face of pedestal 11, and the opening of straight slot is towards inside.In this way, in 33 rotation process of eccentric wheel, photoelectricity blocks Piece 40, which can stretch into, plays the role of shading in straight slot.

It is configured to what those skilled in the art were understood according to the diaphragm pump 100 of this practical embodiment other, here not It is described in detail again.

In the description of the utility model, it is to be understood that the instructions such as term " on ", " under " ", bottom ", " interior ", " outer " Orientation or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description the utility model and letter Change description rather than instruction or imply signified device or element must have specific orientation, with specific azimuth configuration and Operation, therefore it is not intended that limitation to the utility model.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under " can be contacted directly including the first and second features, it is not to contact directly but lead to that can also include the first and second features Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the One feature is directly over second feature and oblique upper or is merely representative of fisrt feature level height higher than second feature.First is special Sign second feature " under ", " lower section " and " below " including fisrt feature directly over second feature and oblique upper or only Represent that fisrt feature level height is less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It is combined in an appropriate manner in any one or more embodiments or example.

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Illustratively, it is impossible to be interpreted as the limitation to the utility model, those of ordinary skill in the art are not departing from the utility model Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and Modification.

Claims (11)

1. a kind of diaphragm pump, which is characterized in that including：

The pump housing, the pump housing include sequentially connected upper cover, valve seat and cylinder body, and the valve seat has lower inlet opening and upper water-out Hole, the upper cover and the valve seat structure set out mutually independent intake antrum and water chamber, the lower inlet opening and the intake antrum Connection, the upper water-out hole is connected with the water chamber；

Water inlet valve block, the bottom surface that the water inlet valve block is arranged on the valve seat are used to open or close the lower inlet opening；

Diaphragm unit, the top surface that the diaphragm unit is arranged on the valve seat are used to open or close the upper water-out hole；

Piston component, the piston component are connected to the bottom of the valve seat, and the piston component includes the utricule with blister cavities, The blister cavities is connected by the lower inlet opening and the upper water-out hole with the intake antrum and the water chamber respectively, the cylinder The bottom surface of body has been downwardly extending stop bit part；

Link assembly, the link assembly drive the utricule to swing up and down to squeeze between upper movement stop and lower movement stop The function that the blister cavities realizes pumped fluid is pressed or stretches, the link assembly includes：Connecting rod, the connecting rod connect with the utricule It connects, the lower face of the stop bit part is opposite with the center of the connecting rod top surface and is spaced a predetermined distance.

2. diaphragm pump according to claim 1, which is characterized in that the lower face of the stop bit part and the connecting rod top surface 0.1-0.4 millimeters of center interval.

3. diaphragm pump according to claim 1, which is characterized in that the stop bit part be stop bit column, the length of the stop bit column It spends for 1-3 millimeters.

4. diaphragm pump according to claim 1, which is characterized in that the utricule includes：

Multiple blister cavities, multiple blister cavities are open upwards；

Tablet, the tablet are connected to the upper end edge of multiple blister cavities, so as to which multiple blister cavities be connected to form one；

Mounting post, the mounting post are connected to the bottom of the blister cavities, and the connecting rod has second with mounting post cooperation Mounting hole.

5. diaphragm pump according to claim 4, which is characterized in that the blister cavities includes：

Thinner wall section, the upper end of the mounting post are connected with the bottom surface of the thinner wall section；

Thick wall portion, the lower end week of the thick wall portion is along, along being connected, the upper end of the thick wall portion is all with the upper end of thinner wall section week Edge is connected with the bottom surface of the tablet.

6. diaphragm pump according to claim 5, which is characterized in that the wall thickness of the thick wall portion is more than the wall of the thinner wall section It is 0.2 millimeter thick.

7. diaphragm pump according to claim 6, which is characterized in that between the wall thickness of the thinner wall section is 0.3-0.6 millimeters.

8. diaphragm pump according to claim 4, which is characterized in that the top surface of the cylinder body upwardly extends that be formed with second fixed Position column, the tablet are equipped with the second location hole with second positioning column cooperation.

9. diaphragm pump according to claim 8, which is characterized in that the radial dimension of second positioning column is more than described the The radial dimension of two location holes.

10. diaphragm pump according to claim 5, which is characterized in that the cylinder body has the first mounting hole, and the utricule falls Enter in first mounting hole, the outer diameter of the thick wall portion is more than the internal diameter of first mounting hole.

11. diaphragm pump according to claim 1, it is characterised in that：The diaphragm pump further includes：

Drive component, the driving component include：

Pedestal, the pump housing are connected to pedestal and set out chamber with structure；

Motor, the motor have motor shaft；

Link assembly, the link assembly is interior to be arranged in chamber, and the link assembly has eccentric wheel and steel shaft, the motor shaft It is connected with eccentric wheel；

Photoelectricity shielding plate, the photoelectricity shielding plate are integrally formed at the eccentric wheel, the photoelectricity shielding plate and the eccentric wheel It is rotated synchronously with the motor shaft；

Photoelectric sensor, the photoelectric sensor are arranged at the pedestal, and the photoelectric sensor is matched somebody with somebody with the photoelectricity shielding plate It shares in the rotating speed for detecting the motor shaft, and detection signal is sent to electric machine controller, the electric machine controller is according to inspection Survey the rotating speed of the motor shaft of signals-modulating motor.