CN208445385U - Electronic pump - Google Patents

Abstract

A kind of electronic pump, including pump case, rotor assembly, stator module and circuit board；Pump case includes first shell and second shell, and first shell fixed connection opposite with second shell, pump case, which is capable of forming, pumps inner cavity；The accommodating chamber that pump inner cavity is divided into the flowing lumen that can have working media to flow through and is flowed through without working media by a separation sleeve, rotor assembly includes rotor, rotor is located at the periphery of stator module, rotor assembly is set to flowing lumen, circuit board is electrically connected with stator module, and stator module and circuit board are set to accommodating chamber；Separation sleeve includes a cavity, and cavity includes the first side wall, and at least partly stator module is set to cavity, and at least partly lateral wall of the first side wall and at least partly stator module is interference fitted；Be conducive to reduce the vibration that stator module occurs at work in this way, to reduce noise, be conducive to the working performance and service life that improve electronic pump.

Description

Electronic pump

[technical field]

The utility model relates to the pump installations of a kind of vehicular hot pipe reason system more particularly to vehicular hot pipe reason system.

[background technique]

In recent decades, automobile industry is grown rapidly, more reliable as automotive performance is towards safer, more stable, it is complete from Dynamic intelligent and environmental protection and energy saving direction is developed, and electronic pump replaces traditional mechanical pump gradually, and is largely applied to automobile-used In heat dissipation circulating system.Electronic pump has many advantages, such as no electromagnetic interference, and high-efficiency environment friendly is well positioned to meet the requirement in market.

The stator module and rotor assembly of electronic pump are completely isolated by separation sleeve, avoid traditional electric motor type brushless direct-current Fluid leakage problems existing for water pump；But electronic pump is in the process of running, stator module is due to the circumferential gap with separation sleeve And vibration, which occurs, makes electronic pump generate noise, to influence working performance and the service life of electronic pump.

[utility model content]

Stator module can be improved due to the circumferential gap with separation sleeve the purpose of this utility model is to provide one kind and The electronic pump vibrated reduces the noise of electronic pump, is conducive to working performance and the service life of improving electronic pump.

To achieve the above object, a kind of embodiment of the utility model adopts the following technical scheme that a kind of electronic pump, packet Include pump case, rotor assembly, stator module and circuit board；The pump case includes first shell and second shell, and described The fixed connection opposite with the second shell of one shell, the pump case are capable of forming pump inner cavity；The pump inner cavity is by an isolation Cover the accommodating chamber that is divided into the flowing lumen that can there is working media to flow through and flows through without working media, the circuit board with it is described fixed Sub-component electrical connection, it is characterised in that: the rotor assembly is set to the flowing lumen, the stator module and the circuit board It is set to the accommodating chamber；The rotor assembly includes rotor, and the rotor is located at the periphery of the stator module；The isolation Set includes a cavity, and the cavity includes the first side wall, and at least partly described stator module is set to the cavity, at least partly The lateral wall of the first side wall and at least partly described stator module is interference fitted.

Since electronic pump includes separation sleeve, separation sleeve includes a cavity, and cavity includes the first side wall, at least partly stator pack Part is set to cavity, and at least partly lateral wall of the first side wall and at least partly stator module is interference fitted；Be conducive to subtract in this way The vibration that small stator module occurs at work, to reduce noise, be conducive to the working performance for improving electronic pump and use the longevity Life.

[Detailed description of the invention]

Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model electronic pump；

Fig. 2 is the structural schematic diagram of the injection molding body of pump shaft and second shell shown in Fig. 1；

Fig. 3 is a kind of the schematic diagram of the section structure of the first embodiment of structure shown in Fig. 2；

Fig. 4 is the overlooking structure diagram of structure shown in Fig. 2；

Fig. 5 is a kind of the schematic diagram of the section structure of structure shown in Fig. 2；

Fig. 6 is a kind of schematic perspective view of the first embodiment of structure shown in Fig. 2；

Fig. 7 is the portion the A enlarged diagram of structure shown in Fig. 4；

Fig. 8 is the structural schematic diagram of stator module and circuit board composition shown in Fig. 1；

Fig. 9 is a kind of sectional structure chart of structure shown in Fig. 8；

Figure 10 is the overlooking structure diagram of structure shown in Fig. 8；

Figure 11 is a kind of the schematic diagram of the section structure of second of embodiment of structure shown in Fig. 2；

Figure 12 is a kind of the schematic diagram of the section structure of the third embodiment of structure shown in Fig. 2；

Figure 13 is the combining structure schematic diagram that second shell in Fig. 1, stator module and circuit board are assembled together；

Figure 14 is a kind of the schematic diagram of the section structure of structure shown in Figure 13；

Figure 15 is the schematic top plan view of structure shown in Figure 13；

Figure 16 is the portion the B enlarged diagram of structure shown in Figure 15.

[specific embodiment]

The utility model is described in further detail in the following with reference to the drawings and specific embodiments:

Shown in Figure 1, electronic pump 100 provides mobilization dynamic, electronic pump 100 for the working media that automotive thermal tube manages system Including pump case, rotor assembly 4, stator module 5, pump shaft 6, circuit board 7；Pump case includes first shell 1 and second shell 2, First shell 1 and the relatively fixed connection of second shell 2, pump case, which is capable of forming, pumps inner cavity, and in the present embodiment, electronic pump 100 is also Including a bottom cover 3, first shell 1, second shell 2 and bottom cover 3 are relatively fixed to be connected and forms pump case, naturally it is also possible to no Including bottom cover 3, bottom cover 3 and 2 integrated injection molding of second shell shape；In the present embodiment, between first shell 1 and second shell 2 Coupling part is provided with ring type seal 8, and the structure of the sealing ring 8 of setting can prevent working media from oozing out in junction, together When can prevent extraneous medium penetrate into pump inner cavity；Electronic pump 100 has a separation sleeve 20, and separation sleeve 20 is divided into stream for inner cavity is pumped Cavity 90 and accommodating chamber 91 can have working media to flow through in flowing lumen 90, and rotor assembly 4 is set to flowing lumen 90, accommodating chamber 91 pass through without working media, and circuit board 7 is electrically connected with stator module 5, and stator module 5 and circuit board 7 are set in accommodating chamber 91； 4 part of rotor assembly is sheathed on the outer peripheral surface of pump shaft 6.

In the present embodiment, electronic pump 100 is external-rotor-type electronic pump, and external-rotor-type electronic pump refers to centered on pump shaft 6, The rotor 40 of rotor assembly 4 is located at the periphery of stator module 5, i.e. rotor 40 is arranged around 5 periphery of stator module；Outer rotor water Pump has good heat dissipation performance, and structure is simply convenient for manufacturing, and is suitably applied in the car radiation circulatory system.Such as Fig. 1 Shown, first shell 1 is moulding, and injection molded has flow inlet 11 and outflow port 12, when electronic pump 100 works, working media It is circulated chamber 90 by flow inlet 11, then working media leaves flowing lumen 90 by outflow port 12, and electronic pump 100 works When, by the way that connector (being not shown on figure) to be inserted into the plug receptacle 93 of electronic pump 100, so that the control circuit on circuit board 7 It is connect with external power supply, control circuit control is changed by the electric current of stator module 5 according to certain rule, to control stator Component 5 generates changing magnetic field, and the rotor of rotor assembly 4 surrounds the rotation of pump shaft 6 under the influence of a magnetic field, so that entering stream Working media in cavity 90 makes rotating motion with rotor, and working media generates flowing since centrifugal force leaves flowing lumen 90 Power.

As shown in Figure 2 to Figure 3, second shell 2 is moulding, and second shell 2 is formed with pump shaft 6 for insert injection moulding；Second Shell 2 includes outer housing 21 and separation sleeve 20, and in the present embodiment, separation sleeve 20 is a part of second shell 2, be arranged in this way every From set 20, it is possible to reduce mold used in processing, and also the inner sealing of electronic pump is good；Certainly, separation sleeve 20 can also be with Separately formed is that a components are assembled into electronic pump 100, and separately formed separation sleeve 20, mold is relatively easy.

As shown in figure 3, separation sleeve 20 is substantially u-shaped, certain separation sleeve 20 or other shapes；Separation sleeve 20 includes One cavity 25, cavity 25 include the first side wall 250 and bottom 251, and the stator module 5 at least partly Fig. 1 is set to cavity 25； As shown in Figure 4 and Figure 5, the first side wall 250 includes the first wall 2501, and along the circumferential direction of cavity 25, the first wall 2501 includes stem 2502 and tail portion 2503, the first wall 2501 gradually increased from stem 2502 to the wall thickness of tail portion 2503, from Fig. 5 it can also be seen that, every Wall thickness from set is gradually increased from stem 2502 to tail portion 2503；As shown in Figures 4 to 6, separation sleeve 20 at least further includes one First reinforcing rib 26, at least partly the first reinforcing rib 26 are set to the first adjacent wall 2501, the first reinforcing rib 26 and separation sleeve 20 integrated injection moldings shape, and in the present embodiment, in order to be correspondingly arranged with stator module 5 in Fig. 1, there are four first for the setting of separation sleeve 20 The first wall of reinforcing rib 26 and 4 2501, and the first reinforcing rib 26 substantially circumferentially array distribution or is uniformly distributed；First reinforcing rib 26 is substantially L-shaped, certainly, the other shapes such as the first reinforcing rib 26 or triangle, in 26 connection figure 3 of the first reinforcing rib The first side wall 250 and bottom 251, in this way setting can increase the intensity of separation sleeve, reduce the deformation of separation sleeve, thus reduction pair The influence of electronic pump working performance.

As shown in Figures 3 to 6, separation sleeve 20 further includes jack-post 24, and jack-post 24 and 20 integrated injection molding of separation sleeve shape, axis Column 24 is at least partially disposed in cavity 25, and jack-post 24 includes at least first limiting section 240, in the present embodiment, jack-post 24 Including first limiting section 240, certain jack-post 24 also may include two and more than two first limiting sections 240, this reality It applies in example, the transversal cross-section containing the jack-post at 240 shaft part of the first limiting section is generally shaped like D-shaped, naturally it is also possible to be other shapes Shape, such as rectangular with 4 the first limiting sections or the shape with the first limiting section that other are based on cylinder, In the shape of the first limiting section can be one or more kinds of combinations；Jack-post 24 can be one-part form or multisection type, one For the jack-post 24 of segmentation without step, the transversal cross-section shape of the jack-post 24 of one-part form in an arbitrary point is roughly the same；The jack-post of multisection type At least one of them contains the first limiting section 240, and in the present embodiment, jack-post is one-part form, and jack-post is in transverse cutting anywhere Face shape is generally D-shaped, and such mold manufacture is relatively easy；Pump shaft 6 is fixed as injection molding inserts and the injection molding of separation sleeve 20, pump 6 part of axis is coated by jack-post 24, and the end of 6 one end of part pump shaft that jack-post 24 is coated is provided with centre bore 23, center The central axis in hole 23 and the central axis of pump shaft 6 substantially overlap, and when injection molding, fixture clamps one that pump shaft 6 exposes separation sleeve 20 It holds and by deviation of the central axis of the positioning core axle insertion guarantee pump shaft 6 of centre bore 23 in injection molding in control range, it is such Words can guarantee the concentricity of jack-post 24 and pump shaft 6, and then guarantee the concentricity of rotor assembly 4 and stator module 5 in Fig. 1.

As shown in Figure 4 and Figure 6, second shell 2 includes the second inner sidewall 28, and the second inner sidewall 28 is at least provided with one Limit rib 27, limit rib 27 and 2 integrated injection molding of second shell shape, and are provided with second between second shell 2 and separation sleeve 20 Reinforcing rib 29, the second reinforcing rib 29 connect the top of 25 open side of the second inner sidewall 28 and cavity of second shell 2, and second reinforces Muscle 29 circumferentially array distribution or is uniformly distributed, and the second reinforcing rib 29 of setting can guarantee separation sleeve 20 and 2 transition of second shell The intensity at place, to advantageously reduce the deformation of second shell 2.

As shown in Fig. 8 to Figure 10, stator module 5 includes core assembly 50 and coil 51, and core assembly 50 includes stator iron Core 500 and insulation division 501, core assembly 50 are with stator core 500 for injection molding inserts and in stator core partial outer face shape At the injection molding body including injection molded layers, part injection layer forms insulation division 501, and insulation division 501 can prevent coil 51 and stator Conductive between iron core 500, stator core 500 includes the silicon steel sheet 502 laminated, and the lateral wall of stator module 5 is silicon steel sheet Lateral wall；Stator core 500 further includes iron core inner hole 503 and 4 teeth portion 505, and iron core inner hole 503 includes the second limiting section The first limiting section 240 of jack-post 24 is correspondingly arranged in 504, second limiting section 504 and Fig. 4, for the transverse direction with jack-post in Fig. 3 Cross sectional shape is identical, and in the present embodiment, the transversal cross-section shape at any place of iron core inner hole 503 is generally D-shaped, and is arranged in this way Iron core inner hole 503 fabricates simply, naturally it is also possible to according to the shape of 24 cross section of jack-post in Fig. 4 be other shapes.Circuit Plate 7 includes third limiting section 70 and portion of terminal 71, third limiting section 70 with the limit rib 27 of second shell 2 is corresponding in Fig. 6 sets Set, in this way can to avoid when locking screw generate wide-angle the displacement that rotates in a circumferential direction, thus guarantee circuit board 7 portion of terminal 71 and The effective centering of end cap inserted sheet (not shown) guarantees that nothing inserts inclined risk.

Fig. 3 to Fig. 7 is the first embodiment of first shell, as shown in Figure 6 and Figure 7, the first side wall of separation sleeve 20 250 include at least a lug boss 252, and lug boss 252 and 20 integrated injection molding of separation sleeve shape, and lug boss 252 is along the first side Wall 250 is interference fitted in axial setting, the lateral wall of at least partly at least partly stator module 5 in lug boss 252 and Fig. 8； The corresponding transversal cross-section of lug boss 252 is obtained to do section to lug boss 252 with the plane of the axis perpendicular of cavity 25, it is convex Rise portion 252 transversal cross-section shape can one of shape such as substantially rectangular, trapezoidal or triangle or arc, certainly It can be two or more combinations in above-mentioned shape, i.e. it is different that transversal cross-section shape can be set in the first side wall 250 Lug boss 252；In the present embodiment, the transversal cross-section of lug boss 252 is substantially rectangular in shape, and the first side wall 250 includes 4 Lug boss 252, and 4 lug bosses 252 along the first side wall circumference array or are uniformly distributed, certain lug boss 252 can also be set It sets in Fig. 7 on the lateral wall of stator module 5, also can achieve identical purpose.

As shown in figs. 4 and 7, the first wall 2501 from stem 2502 to tail portion 2503 to the rising height of cavity 25 gradually Increase, lug boss 252 is arranged by caudad 2503, here in order to preferably describe the positional relationship of lug boss 252, definition stem It is convex respectively for second part in the 2503 to the first wall of tail portion 2501 respectively for first part in 2502 to the first wall 2501 It plays portion 252 to be set in second part, lug boss 252 is arranged along at least partially circumferentially track of second part, specifically, such as schemes Shown in 5, the wall thickness t2 for being located at separation sleeve 20 at second part is less than positioned at the wall thickness t1 of separation sleeve 20 at first part, in this way may be used To guarantee that the place of isolation sleeve wall thickness is arranged in lug boss 252, thus the change caused by reducing separation sleeve 20 in assembling process Shape.

Lug boss 252 is arranged close to the first reinforcing rib 26, and in the present embodiment, the first side wall 25 includes 4 the first walls 4 teeth portion 505 of stator module are correspondingly arranged in 2501,4 first wall 2501 and Figure 10, and each first wall 2501 includes at least One lug boss 252 is provided with the first reinforcing rib 26, lug boss 252 and the first reinforcing rib 26 between the first adjacent wall 2501 Shaped with 2501 integrated through injection molding of the first wall；As shown in fig. 7, the first reinforcing rib 26 be raised to protrude into cavity 25 height h1 it is big The height h2 for protruding into cavity is raised in lug boss 252, setting in this way can guarantee the stator in first reinforcing rib 26 and Fig. 8 It, will not recurring structure interference in assembling process after component is correspondingly arranged；Along the circumferential direction of cavity 25, the width W2 of lug boss 252 Greater than the width W1 of the first reinforcing rib 26, wherein the width W2 of lug boss 252 refers to lug boss 252 along the week of the first side wall 250 To the span for being formed by circumferential track, the width W1 of reinforcing rib 26 refers to circumferential direction institute shape of the reinforcing rib 26 along the first side wall 250 At circumferential track span, setting in this way can make the lateral wall of the stator module 5 in the first side wall and Fig. 8 in assembling process Middle interference fit has more contact area, to reduce the vibration that stator module occurs during the work time.

Figure 11 is second of embodiment of second shell, as shown in figure 11, along the axial direction of separation sleeve 20 ', cavity 25 ' The bottom 251 ' of diameter from open side to the cavity 25 ' of cavity 25 ' is gradually reduced；Compared to the first embodiment, this implementation 2 ' structure of second shell in mode is simple, and manufacturing cost is low；The first of the other features of second shell 2 ' and second shell Embodiment is the same, does not just repeat one by one herein.

Figure 12 be second shell the third embodiment, as shown in figure 12, the first side wall 250 " include lower part 2511 " and Top 2512 ", the diameter of lower part 2511 " everywhere is equal, and open side of the top 2512 " than lower part 2511 " close to cavity 25 " is set It sets, the diameter on top 2512 " is gradually decrease to lower part 2511 " from 25 " open side of cavity, along the axial direction of separation sleeve 20 ", lower part 2511 " length H1 is greater than the length H2 on top 2512 ", here the length H2 of the length H1 of lower part 2511 " and top 2512 " Refer to the vertical length perpendicular to bottom 251 ", in this case, the lateral wall of the first side wall 250 " Yu stator module 5 can be increased The contact area of interference fit in assembling process, so that the vibration of stator module is reduced, compared to second embodiment, The contact surface of lateral wall interference fit in assembling process of stator module 5 in the first side wall 250 " and Fig. 8 of separation sleeve 20 " Product is big, and reliability is higher；The other features of second shell 2 " are just different herein as the first embodiment of second shell One repeats.

As shown in figure 13 to figure 16, stator module 5 and circuit board 7 are packed into second shell 2, in assembling process, Tu10Zhong 4 the first walls 2501 of separation sleeve 20 are correspondingly arranged in 4 teeth portion 505 and Fig. 5 of stator module, due in second shell 2 The first side wall 250 of the cavity 25 of separation sleeve 20 includes at least a lug boss 252 (as shown in Figure 7) or from cavity hatch side To the bottom of separation sleeve, the diameter of cavity that at least partly the first side wall surrounds be gradually reduced (as is illustrated by figs. 11 and 12), from And at least partly the first side wall of at least partly lateral wall of stator module 5 and separation sleeve 20 interference fit is connected, it sets in this way Be equipped with and be conducive to reduce the vibration that is occurred at work of stator module 5, reduce noise, thus improve electronic pump working performance and Service life；Stator module 5 is sheathed on the outer peripheral surface of jack-post 24 when assembling, the first limiting section 240 and Figure 10 of jack-post 24 in Fig. 4 Second limiting section 504 of middle iron core inner hole 503 is correspondingly arranged, at least partly inner surface and figure of the iron core inner hole 503 in Figure 10 At least partly outer surface of jack-post 24 is equipped in 3, defines the place that iron core inner hole is equipped with jack-post in Fig. 3 in Figure 10 For auxiliary section, be with the side that stator module 5 connects circuit board 7 it is upper, in Fig. 3 positioned at auxiliary section jack-post 24 outer peripheral surface and figure Transversal cross-section shape in 10 positioned at the inner peripheral surface of the iron core inner hole 503 of auxiliary section is roughly the same；Due to of jack-post 24 in Fig. 4 The second limiting section 504 of iron core inner hole 503 is correspondingly arranged in one limiting section 240 and Figure 10, on the one hand ensure that stator module exists Misloading will not occur in assembling process, on the other hand can also make stator module that the displacement that rotates in a circumferential direction of wide-angle will not occur； As shown in Figure 15 and Figure 16, the third limiting section 70 of circuit board 6 is correspondingly arranged with the limit rib 27 of second shell 2, is effectively kept away The displacement that rotates in a circumferential direction generated when locking the screw 92 in Figure 14 is exempted from, to guarantee the portion of terminal and end cap inserted sheet of circuit board The effective centering of (not shown) guarantees that nothing inserts inclined risk.

It should be understood that above embodiments are merely to illustrate the utility model and not limit described by the utility model Technical solution, although this specification has been carried out detailed description to the utility model referring to the above embodiments, this Field it is to be appreciated by one skilled in the art that person of ordinary skill in the field still can modify to the utility model Or equivalent replacement, and the technical solution and its improvement of all spirit and scope for not departing from the utility model, it should all cover In the scope of the claims of the utility model.

Claims (12)

1. a kind of electronic pump, including pump case, rotor assembly, stator module and circuit board；The pump case includes first shell Body and second shell, the first shell fixed connection opposite with the second shell, the pump case are capable of forming pump inner cavity； The accommodating chamber that the pump inner cavity is divided into the flowing lumen that can have working media to flow through and is flowed through without working media by a separation sleeve, The circuit board is electrically connected with the stator module, it is characterised in that: the rotor assembly is set to the flowing lumen, described fixed Sub-component and the circuit board are set to the accommodating chamber, and the rotor assembly includes rotor, and the rotor is located at the stator The periphery of component, the separation sleeve include a cavity, and the cavity includes the first side wall, at least partly described stator module setting In the cavity, the lateral wall of at least partly described the first side wall and at least partly described stator module is interference fitted.

2. electronic pump according to claim 1, it is characterised in that: the cavity further includes bottom, along the separation sleeve Axial, from the open side of the cavity to the bottom of the cavity, the diameter of at least partly described cavity is gradually reduced.

3. electronic pump according to claim 2, it is characterised in that: the first side wall includes upper and lower part, under described The diameter of portion everywhere is equal, and the top is arranged than the lower part close to the cavity hatch side, and the diameter on the top is from institute The open side for stating cavity is gradually decrease to the lower part, and along the axial direction of the separation sleeve, the length of the lower part is greater than on described The length in portion.

4. electronic pump according to claim 2, it is characterised in that: along the axial direction of the separation sleeve, the diameter of the cavity It is gradually reduced from the bottom of open side to the cavity of the cavity.

5. electronic pump according to claim 1, it is characterised in that: the first side wall includes at least a lug boss, institute It states lug boss and the separation sleeve integrated through injection molding shapes, the lug boss is axially arranged along the first side wall, at least partly The lateral wall of the lug boss and at least partly described stator module is interference fitted.

6. electronic pump according to claim 5, it is characterised in that: the first side wall includes the first wall, along the cavity Circumferential direction, first wall includes stem and tail portion, and first wall is gradually increased from the stem to the wall thickness of the tail portion, The lug boss is arranged close to the tail portion.

7. electronic pump according to claim 6, it is characterised in that: define the stem into first wall respectively for First part, into first wall respectively for second part, the lug boss is set to the second part for the tail portion Interior, the lug boss is arranged along at least partially circumferentially track of the second part.

8. electronic pump according to claim 6, it is characterised in that: the cavity includes bottom, and the separation sleeve at least wraps First reinforcing rib is included, at least partly described first reinforcing rib is set to adjacent first wall, first reinforcing rib The first side wall of the cavity and the bottom of the cavity are connected, the lug boss is set close to first reinforcing rib It sets.

9. electronic pump according to claim 8, it is characterised in that: first reinforcing rib, which is raised to, protrudes into the cavity Height is greater than the lug boss and is raised to the height for protruding into the cavity.

10. according to the described in any item electronic pumps of claim 5 to 9, it is characterised in that: with the axis perpendicular with the cavity Plane section done to the lug boss obtain the corresponding transversal cross-section of the lug boss, the transversal cross-section it is generally rectangular shaped or Trapezoidal or triangle or arc.

11. electronic pump according to any one of claims 1 to 9, it is characterised in that: the stator module includes 4 teeth portion, The first side wall includes 4 the first walls, and the teeth portion is correspondingly arranged with first wall, sets between adjacent first wall It is equipped with the first reinforcing rib, each first wall includes at least a lug boss, the lug boss and first reinforcing rib It is shaped with the first wall integrated through injection molding, along the circumferential direction of the cavity, the width of the lug boss is greater than described first and reinforces The width of muscle；The first side wall includes at least a lug boss, and the lug boss and the separation sleeve integrated through injection molding shape, institute It states lug boss and is axially arranged along the first side wall, at least partly described lug boss is outer at least partly described stator module Side wall interference fit；The first side wall includes the first wall, and along the circumferential direction of the cavity, first wall includes stem and tail Portion, first wall are gradually increased from the stem to the wall thickness of the tail portion, and the lug boss is arranged close to the tail portion；It is fixed For the justice stem into first wall respectively for first part, the tail portion is being respectively second into first wall Point, the lug boss is set in the second part, and the lug boss is along at least partially circumferentially track of the second part Setting；The cavity includes bottom, and the separation sleeve includes at least first reinforcing rib, at least partly described first reinforcing rib It is set to adjacent first wall, first reinforcing rib connects the first side wall of the cavity and the institute of the cavity Bottom is stated, the lug boss is arranged close to first reinforcing rib；First reinforcing rib is raised to the height for protruding into the cavity Degree is greater than the lug boss and is raised to the height for protruding into the cavity；With the plane of the axis perpendicular with the cavity to described Lug boss does section and obtains the corresponding transversal cross-section of the lug boss, and the transversal cross-section is generally rectangular shaped or trapezoidal or triangle Or arc.

12. electronic pump according to claim 10, it is characterised in that: the stator module include 4 teeth portion, described first Side wall includes 4 the first walls, and the teeth portion is correspondingly arranged with first wall, is provided with first between adjacent first wall Reinforcing rib, each first wall include at least a lug boss, the lug boss and first reinforcing rib with it is described The forming of first wall integrated through injection molding, along the circumferential direction of the cavity, the width of the lug boss is greater than the width of first reinforcing rib； The first side wall includes at least a lug boss, and the lug boss and the separation sleeve integrated through injection molding shape, the lug boss Axially it is arranged along the first side wall, the lateral wall interference of at least partly described lug boss and at least partly described stator module Cooperation；The first side wall includes the first wall, and along the circumferential direction of the cavity, first wall includes stem and tail portion, and described the One wall is gradually increased from the stem to the wall thickness of the tail portion, and the lug boss is arranged close to the tail portion；Define the head Portion into first wall respectively for first part, the tail portion into first wall respectively for second part, it is described Lug boss is set in the second part, and the lug boss is arranged along at least partially circumferentially track of the second part；Institute Stating cavity includes bottom, and the separation sleeve includes at least first reinforcing rib, and at least partly described first reinforcing rib is set to Adjacent first wall, first reinforcing rib connect the first side wall of the cavity and the bottom of the cavity Portion, the lug boss are arranged close to first reinforcing rib；First reinforcing rib be raised to protrude into the cavity height it is big The height for protruding into the cavity is raised in the lug boss；With the plane of the axis perpendicular with the cavity to the protrusion Portion does section and obtains the corresponding transversal cross-section of the lug boss, and the transversal cross-section is generally rectangular shaped or trapezoidal or triangle or arc Shape.