CN209627108U - The waterproof and dustproof construction of outer rotor fan motor - Google Patents

Abstract

A kind of waterproof and dustproof construction of outer rotor fan motor include a fan hub, and one end is formed with an open end, and the other end then forms a closed end, and defines an annular space and an accommodating space inside the fan hub；Multiple flabellums, spacer ring winding are set in the outer peripheral edge of the fan hub；And a magnet ring, ring are located in the accommodating space of the fan hub；And a stator unit, it include stator group part；And a rear cover, inside define one first assembling grove and one second assembling grove；First assembling grove is assembled for the stator module；And second assembling grove plugs merging for the outer peripheral edge of the fan hub of the rotor unit；The stator module is enabled to be located in the accommodating space of fan hub of the rotor unit; foreign matter, aqueous vapor or external dust of external environment etc. can be effectively stopped to invade in the magnet ring of accommodating space and the stator module of the stator unit of the fan hub; it causes abnormal or damage and reduces reliability and service life, and then promote whole service life.

Description

The waterproof and dustproof construction of outer rotor fan motor

Technical field

The utility model is related to a kind of technical field of outer rotor fan motor, more particularly to it is a kind of have prevent dust or moisture The outer rotor fan motor of intrusion.

Background technique

Motor is the component for converting electrical energy into mechanical energy, and is widely used to the mechanical structure in daily life In, such as fan.

It please refers to shown in Figure 11, existing motor 3 includes a motor base 40, a rotor 41, a stator 42 and a circuit Plate 43；Wherein the motor base 40 includes a central siphon portion 401, and an at least bearing 402 is accommodated in the central siphon portion 401；The rotor 41 include a shaft 411, an iron-clad 412 and a magnet ring 413, which is embedded in the iron-clad 412 and is threaded through the central siphon portion 401 and the bearing 402,413 ring of magnet ring be located at the inner wall of the iron-clad 412.

The stator 42 includes multiple coil groups, those coil groups are attached at the central siphon portion 401 and the corresponding magnet ring 413 is set It sets.The circuit board 43 is arranged and is attached at the central siphon portion 401, and setting electrically connects on the motor base 40, and with coil group It connects.By the current direction of the 43 driving coil group of circuit board, so that the magnet ring 413 of coil group and the rotor 41 generates magnetic field and makees With, and then rotate the rotor 31.

The above-mentioned motor 3 can generally arrange in pairs or groups an impeller 5 to constitute a fan, which passes through the central siphon portion 401 and should Bearing 402 and extend in except the motor base 40, link with the impeller 5, due between the motor base 40 and impeller 5 and All there is clearance G between the stator 42 and the motor base 40, foreign matter, aqueous vapor or external dust of external environment etc. are easy to be passed through Clearance G and invade the bearing 402 or the stator 42, cause the motor 4 abnormal or damage, thus reduce the reliability of the motor 4 With service life, actually a big drawback problem, and urgently improved.

Utility model content

Therefore, the purpose of the utility model is providing a kind of outer rotor fan motor for preventing dust or moisture from invading.

To reach foregoing purpose, the utility model proposes the waterproof and dustproof construction of a kind of outer rotor fan motor, it includes:

One rotor unit includes a fan hub, and one end is formed with an open end, and the other end then forms a closed end, The closed end is equipped with an axis hole, and defines an annular space and an accommodating space inside the fan hub；Multiple flabellums, interval It is circumferentially positioned at the outer peripheral edge of the fan hub；And a magnet ring, ring are located in the accommodating space of the fan hub；And

One stator unit includes stator group part；And a rear cover, one end are formed with an open end；Its other end Then form a closed end；One first assembling grove and one second assembling grove are defined inside the rear cover again；First assembling grove is for being somebody's turn to do Stator module assembling；And second assembling grove plugs merging for the outer peripheral edge of the fan hub of the rotor unit；Enable the stator module position In in the accommodating space of the fan hub of the rotor unit.

Preferably, the fan hub is equipped with an external annulus, which is connected to annular；One internal ring wall, is located at It is surrounded on the inside of the external annulus by the external annulus, and is connected to the closed end, cause to be formed between the external annulus and the internal ring wall aforementioned The annular space, the internal ring wall is then for the aforementioned magnet ring around setting；The external annulus and the internal ring wall are relative to the closed end again The other end then form the aforementioned open end；And the aforementioned accommodating space is then formed in the internal ring wall.

Preferably, the fan hub is integrally formed with those flabellums and is made of plastic cement material；The magnet ring is then that plastic cement projects Cladding mode and be arranged in the accommodating space of the internal ring wall of the fan hub.

Preferably, the external annulus of the fan hub plugs in the second assembling grove of the rear cover for being placed in the stator unit, the two it Between radial clearance distance between 0.8~1.2mm.

Preferably, the external annulus of the fan hub plugs in the second assembling grove of the rear cover for being placed in the stator unit, the two it Between axial gap distance between 0.3~0.7mm.

Preferably, the inner edge surface of the external annulus of the fan hub is equipped with a cut different unit, which is located at the open end.

Preferably, the first assembling grove of the rear cover of the stator unit is equipped with an at least groove along outer peripheral edge；And this is recessed The cut different unit of the external annulus of slot and the fan hub is in corresponding states.

Preferably, the stator module has an ontology, it is equipped with an axis hole；One first frame, setting in the ontology one end and For being assembled in the first assembling grove of the rear cover, which is equipped with one first accommodating hole；One second frame is arranged at this At the ontology other end, which is equipped with one second accommodating hole；An at least bearing is separately positioned on the first of first frame In accommodating hole and in the second accommodating hole of second frame；One shaft is plugged in the bearing of the first accommodating hole of first frame, And sequentially across the closed end for fanning hub of the axis hole of the ontology, the bearing of the second accommodating hole of second frame and the rotor unit Axis hole that place is set and expose outside the fan hub.

Preferably, the shaft end being located at outside the fan hub is formed with a threaded area, and a locking part screw lock of arranging in pairs or groups is in the spiral shell At line area, enabling the shaft is in fixed rotation status.

Preferably, the fan hub is further provided with a central siphon, it is pivoted for the shaft, which is located at the accommodating space of the fan hub It is interior, and it is connected to the closed end of the fan hub, which is equipped with an axis hole, and the axis hole of the axis hole of the central siphon closed end is in communicate, To be pivoted for the shaft.

By above structure it is found that the utility model the utility model has the advantages that

1, by defining one first assembling grove and one second assembling grove inside the rear cover of the stator unit；Wherein this first Assembling grove is assembled for the stator module, and second assembling grove plugs merging for the outer peripheral edge of the fan hub of the rotor unit and is in packet Cover state, enable the stator module be located at the rotor unit fan hub accommodating space in, can effectively stop external environment foreign matter, Aqueous vapor or external dust etc. invade in the magnet ring of accommodating space and the stator module of the stator unit of the fan hub, cause it is abnormal or It damages and reduces reliability and service life, and then promote whole service life.

2, an external annulus and an internal ring wall are equipped with by the fan hub of the rotor unit, and define an annular space and one and holds Between emptying；One first assembling grove and one second assembling grove are defined inside the rear cover of the stator unit again；Wherein first assembling Slot is assembled for the stator module, and second assembling grove plugs merging for the external annulus of the fan hub of the rotor unit and is in coated State, enable the stator module be located at the rotor unit fan hub accommodating space in, by formed in the fan hub annular space with The design of the accommodating space, if foreign matter, aqueous vapor or the external dust etc. of external environment is allowed to invade, thus along the outer of the fan hub The inner edge surface of ring wall is flowed into the annular space, and foreign matter, aqueous vapor or external dust of external environment etc. can effectively be stopped to invade Into the stator module air gap of magnet ring and the stator unit in the accommodating space, causes abnormal or damage and reduce reliability With service life, and then promoted whole service life.

3, an at least groove is equipped with along outer peripheral edge by the first assembling grove of the rear cover of the stator unit；And the groove Cut different unit with the external annulus of the fan hub is in corresponding states；If foreign matter, aqueous vapor or the external dust etc. of external environment is allowed to invade, To fall to the groove of first assembling grove along the cut different unit of the external annulus of the fan hub, allow external environment foreign matter, Aqueous vapor or external dust etc. stop in this groove, and foreign matter, aqueous vapor or external dust of external environment etc. can effectively be stopped to invade Into the ontology of the stator module of magnet ring and the stator unit in the accommodating space, causes abnormal or damage and reduce reliable Degree and service life, and then promote whole service life.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of the utility model.

Fig. 2 is the diagrammatic cross-section of the utility model.

Fig. 3 is the partial enlargement diagram of the utility model Fig. 3.

Fig. 4 is the diagrammatic cross-section of the utility model stator unit.

Fig. 5 is the diagrammatic cross-section of the utility model rotor unit.

Fig. 6 be the utility model preferred embodiment the assembling applied to outdoor unit after front view.

Fig. 7 is the assembling stereogram applied to outdoor unit of the utility model preferred embodiment.

Fig. 8 be the utility model preferred embodiment the assembling applied to outdoor unit after interior view.

Fig. 9 be the utility model preferred embodiment the assembling applied to outdoor unit after diagrammatic cross-section.

Figure 10 is that the outdoor unit that is applied to of the utility model preferred embodiment prevents water and dust-proof intrusion schematic diagram.

Figure 11 is the schematic diagram of existing motor configuration.

[symbol description]

1 rotor unit 11 fans hub

111 open end, 112 closed end

1121 axis hole, 113 external annulus

1131 cut different unit, 114 internal ring wall

115 annular space, 116 accommodating space

117 central siphon, 12 flabellum

13 magnet rings

2 stator unit, 21 stator module

211 ontology, 2111 axis hole

212 first frame, 2,121 first accommodating hole

213 second frame, 2,131 second accommodating hole

214 bearing, 215 shaft

2151 threaded area, 22 rear cover

221 open end, 222 closed end

223 first assembling grove, 2231 groove

224 second assembling grove, 2241 flange

3 outdoor unit, 31 protective net

32 shell, 321 top plate

322 bottom plate, 323 foreboard

3231 outlet, 324 left plate

325 right side plate, 326 partition

327 breather chamber, 328 Machine Room

33 heat exchanger, 34 compressor

35 electric controllers

S locking part

G1 radial clearance

G2 axial gap

4 motor, 40 motor base

401 central siphon portion, 402 bearing

41 rotor, 411 shaft

412 iron-clad, 413 magnet ring

42 stator, 43 circuit board

5 impellers

The gap G

Specific embodiment

The effect of for convenient for understanding the feature, content and advantage of the utility model and its can reach, now the utility model is matched Close attached drawing, and detailed description are as follows with the expression-form of embodiment, and wherein used in attached drawing, purport is only to illustrate and auxiliary Help specification to be used, actual proportions and precisely configuration after may not implementing for the utility model, therefore not should appended attached drawing ratio Example is interpreted with configuration relation, limits to interest field of the utility model in actual implementation.

The advantages of the utility model, feature and the technical method reached will carry out more referring to exemplary embodiments and appended attached drawing It describes in detail and is easier to understand, and the utility model or can realize in different forms, therefore not it is understood that being limited only to this The embodiment of place statement, on the contrary, to those skilled in the art, provided embodiment will make the utility model more Thoroughly with the scope of conveying the utility model comprehensively and completely, and the utility model will only be that attached claim is defined.

It is " waterproof and dustproof construction of outer rotor fan motor " of the utility model firstly, please referring to shown in Fig. 1 to Fig. 5, It include: a rotor unit 1 and a stator unit 2；Wherein:

The rotor unit 1 includes a fan hub 11, and whole is in predetermined kenel, which is formed with an opening End 111, and its other end then forms a closed end 112, which is equipped with an axis hole 1121, and inside the fan hub 11 Define an annular space 115 and an accommodating space 116；Multiple flabellums 12, its spacer ring winding of those flabellums 12 are set in the fan The outer peripheral edge of hub 11, and the flabellum 12 can be various existing structure kenels on the market, be not intended to limit its structure kenel；And one Magnet ring 13, its ring of the magnet ring 13 are located in the accommodating space 116 of the fan hub 11, which is multiple magnetic elements with spacer ring It is presented around setting；

The stator unit 2 includes stator group part 21；And a rear cover 22,22 one end of rear cover are formed with one and open Mouth end 221；Its other end then forms a closed end 222；One first assembling grove 223 and one second is defined inside the rear cover 22 again Assembling grove 224；First assembling grove 223 is assembled for the stator module 21；And second assembling grove 224 then supplies the rotor unit 1 The outer peripheral edge of fan hub 11 plug merging；The stator module 21 is enabled to be located at the accommodating space 116 of the fan hub 11 of the rotor unit 1 It is interior；

It is described through the above structure, now it is further described below:

In aforementioned, which is equipped with an external annulus 113, which is connected to 112 periphery of closed end with annular Periphery；One internal ring wall 114, which is located at 113 inside of external annulus and is surrounded by the external annulus 113, and is connected to the envelope Closed end 112 causes to form the aforementioned annular space 115 between the external annulus 113 and the internal ring wall 114, and the internal ring wall 114 then supplies The aforementioned magnet ring 13 is around setting；The other end then shape of the external annulus 113 and the internal ring wall 114 relative to the closed end 112 again At the aforementioned open end 111；And the aforementioned accommodating space 116 is then formed in the internal ring wall 114；

Wherein, which is integrally formed with those flabellums 12 and is made of plastic cement material；The magnet ring 13 is then plastic cement It projects cladding mode and is arranged in the accommodating space 116 of the internal ring wall 114 of the fan hub 11；

Wherein, the external annulus 113 of the fan hub 11 plugs the second assembling grove 224 of the rear cover 22 for being placed in the stator unit 2 Interior, radial clearance G1 distance between the two is between 0.8~1.2mm, and preferably distance is 1mm；Even, second assembling It visually assembles required in slot 224 and adds a flange 2241, when having additional the flange 2241 in second assembling grove 224, The external annulus 113 of the fan hub 11 plugs in the second assembling grove 224 of the rear cover 22 for being placed in the stator unit 2, between the two Radial clearance G1 is then the distance between the flange 2241 and the rear cover 22, and radial clearance G1 distance equally between 0.8~ 1.2mm, preferably distance are 1mm；The external annulus 113 of the fan hub 11 plugs the of the rear cover 22 for being placed in the stator unit 2 again In two assembling groves 224, axial gap G2 distance between the two between 0.3~0.7mm, preferably distance be 0.5mm (such as Shown in Fig. 3)；

Wherein, the inner edge surface of the external annulus 113 of the fan hub 11 is equipped with a cut different unit 1131, which is located at should At open end 111；The first assembling grove 223 of the rear cover 22 of the stator unit 2 is equipped with an at least groove along outer peripheral edge again 2231；And the cut different unit 1131 of the external annulus 113 of the groove 2231 and the fan hub 11 is in corresponding states；

In aforementioned, which has an ontology 211, is equipped with an axis hole 2111, which is then applied in this Ontology 211；One first frame 212, first frame 212 are arranged in 211 one end of ontology and for being assembled in the rear cover 22 In first assembling grove 223, and one first accommodating hole 2121 is equipped in first frame 212；One second frame 213, second frame Frame 213 is arranged at 211 other end of ontology, and is equipped with one second accommodating hole 2131 in second frame 213；An at least bearing 214, respectively the bearing 214 is separately positioned on the with second frame 213 in the first accommodating hole 2121 of first frame 212 In two accommodating holes 2131；One shaft 215, the shaft 215 are plugged in the bearing of the first accommodating hole 2121 of first frame 212 214, and sequentially across the axis hole 2111 of the ontology 211, bearing 214 and this of the second accommodating hole 2131 of second frame 213 The axis hole 1121 that is set at the closed end 112 of the fan hub 11 of rotor unit 1 and expose outside the fan hub 11；

Wherein, 215 end of shaft outside the fan hub 11 is formed with a threaded area 2151, and a locking part S spiral shell of arranging in pairs or groups For lock at the threaded area 2151, enabling the shaft 215 is in fixed rotation status；

In addition, the fan hub 11 is further provided with a central siphon 117, which is pivoted for the shaft 215, and the central siphon 117 In the accommodating space 116 of the fan hub 11, and it is connected to the closed end 112 of the fan hub 11, and the central siphon 117 is equipped with an axis Hole 1171, the axis hole 1171 is then through the central siphon 117, and the axis hole 1121 of the axis hole 1171 of the central siphon 117 closed end 112 In communicating, to be pivoted for the shaft 215.

It is continuous, referring Fig. 6 to Figure 10, be the utility model " waterproof and dustproof construction of outer rotor fan motor " its compared with The use state explanation of good embodiment comprising: a rotor unit 1 and a stator unit 2；Wherein the rotor unit 1 is fixed with this Subelement 2 its overall structure is chatted bright aforementioned, therefore repeats no more；

It, can be by the utility model application when air-conditioning equipment demand when air-conditioning equipment implementation is applied to regard to the utility model When in the outdoor unit 3 of air-conditioning equipment, first a protective net 31 will be incorporated in after the rotor unit 1 and the stator unit 2 assembling It is fixed at a foreboard 323 in fixation, and by the protective net 31, and being located at the rotor unit 1 and the stator unit 2 should 3 inner space of outdoor unit, wherein the foreboard 323 is outdoor unit panel；

Since 3 overall structure of outdoor unit is not the utility model emphasis, underdraws and be described as follows, the outdoor unit 3 also include: a shell 32, a heat exchanger 33, a compressor 34 and an electric controller 35；Wherein:

The shell 32 mainly has a top plate 321, configures in the upper surface of the outdoor unit 3, for covering the outdoor unit 3 The upper surface of inner space；One bottom plate 322 configures below the outdoor unit 3, for covering 3 inner space of outdoor unit Lower section；One foreboard 323 configures before the outdoor unit 3, for covering before 3 inner space of outdoor unit, the foreboard 323 equipped with the outlet 3231 that one is in penetration state, through the protective net 31 configuration before the foreboard 323, for covering this Before the outlet 3231 of foreboard 323；One left plate 324 is configured in the left side of the outdoor unit 3, for covering the room The left side side of outer 3 inner space of machine；One right side plate 325 is configured in the right side of the outdoor unit 3, for covering the outdoor unit 3 The right side side of inner space；And a partition 326, it is vertically disposed on the bottom plate 322, by the inner space of the outdoor unit 3 Left and right two spaces are separated into, relative to the partition 326, the space positioned at left side is a breather chamber 327, and is located at the sky on right side Between be a Machine Room 328, become the space separated to a certain extent with the breather chamber 327, and most mechanical parts accommodate In the Machine Room 328；

The heat exchanger 33 configures in the breather chamber 327 inside the outdoor unit 3, and carries out between the air that passes through Heat exchange；The heat exchanger 33 is arranged from the rear portion of the gas chamber 327 along left side, has generally L-shaped shape；And

The compressor 34 configures in the Machine Room 328 inside the outdoor unit 3, and is fixed on the bottom plate of the shell 32 On 322, which is compressed the refrigerant that the outdoor unit 3 conveys in the compressor 33 by refrigerant piping, passes through system Cryogen pipe arrangement is sent to the heat exchanger 33；

The electric controller 35, configuration at the 3 any place in inside of the outdoor unit, by power supply line be coupled in the rotor unit 1 with Stator unit 2 and make electrical connection；

More than, through the protective net 31 configuration before the outlet 3421 of the foreboard 323 of the outdoor unit 3, for covering It covers before the outlet 3231 of the foreboard 323, and is located at the rotor unit 1 and the stator unit 2 inside the outdoor unit 3 Breather chamber 327 in；It drives the stator unit 2 and the rotor unit 1 to generate magnetic fields when the shaft 215 drives, causes Make those flabellums 12 of the external annulus 113 positioned at the fan hub 11 in rotation status；The air stream generated by the fan 12 is from outer Portion is inhaled into the breather chamber 327 by the back side of the outdoor unit 3, and passes through the row of the heat exchanger 33, the foreboard 323 3231, the protective net 31 are exported, and are discharged to the external of the outdoor unit 3；

When the outdoor unit 3 in the running, by defining first assembling grove 223 inside the rear cover 22 of the stator unit 2 With second assembling grove 224；Wherein first assembling grove 223 is assembled for the stator module 21, and second assembling grove 224 is for being somebody's turn to do The external annulus 113 of the fan hub 11 of rotor unit 1 plugs merging in coated state, and the stator module 21 is enabled to be located at the rotor list In the accommodating space 116 of the fan hub 11 of member 1；

In addition, the fan hub 11 plus the rotor unit 1 is equipped with external annulus 113 and internal ring wall 114, cause the external annulus 113 The annular space 115 is formed between the internal ring wall 114, and the accommodating space 116 is then formed in the internal ring wall 114；The stator again First assembling grove 223 and second assembling grove 224 are defined inside the rear cover 22 of unit 2；Wherein first assembling grove 223 supplies First frame 212 of the stator module 21 assembles, and second assembling grove 224 is then for the outer of the fan hub 11 of the rotor unit 1 Ring wall 113 plugs merging in coated state, and the stator module 21 is enabled to be located at the accommodating space of the fan hub 11 of the rotor unit 1 It is to be respectively and independently separated design by forming the annular space 115 and the accommodating space 116 in the fan hub 11 in 116, allows the external world If the foreign matter of environment, aqueous vapor or dust etc. invade, to be flowed into the ring along the inner edge surface of the external annulus 113 of the fan hub 11 In shape space 115, and it can not invade in the accommodating space 116 of the fan hub 11；

In addition, the first assembling grove 223 of the rear cover 22 of the stator unit 2 is equipped with an at least groove along outer peripheral edge 2231；And the cut different unit 1131 of the external annulus 113 of the groove 2231 and the fan hub 11 is in corresponding states；Allow the different of external environment If object, aqueous vapor or external dust etc. invade, to be fallen into downwards along the cut different unit 1131 of the external annulus 113 of the fan hub 11 To at the groove 2231 of first assembling grove 223, allowing foreign matter, aqueous vapor or the external dust etc. of external environment to stop at this, this is recessed In slot 2231；Alternatively, foreign matter, aqueous vapor or the dust etc. when external environment invade in the annular space 115 of the fan hub 11, lead to Centrifugal force when crossing gravity and rotation, foreign matter, aqueous vapor or the dust of external environment can drop into the groove of first assembling grove 223 At 2231, and discharge in outside the fan hub 11 of the rotor unit 1；

Therefore, the accommodating that can effectively stop foreign matter, aqueous vapor or external dust of external environment etc. to invade the fan hub 11 is empty Between the stator module 212 of the magnet ring 13 in 116 and the stator unit 2 ontology 211 between air gap, cause abnormal or damage and Reduce reliability and service life, and then promote whole service life, so provide it is a kind of have prevent dust or moisture from invading Outer rotor fan motor waterproof and dustproof construction.

The above, the only embodiment of the utility model cannot limit the range of the utility model implementation with this, all according to this Simple equivalent changes and modifications made by novel claim and patent specification content, all still belong to the utility model protection scope It is interior.

Claims (10)

1. a kind of waterproof and dustproof construction of outer rotor fan motor, it is characterised in that include:

One rotor unit includes a fan hub, and one end is formed with an open end, and the other end then forms a closed end, the envelope Closed end is equipped with an axis hole, and defines an annular space and an accommodating space inside the fan hub；Multiple flabellums, spacer ring around The outer peripheral edge of the fan hub is set；And a magnet ring, ring are located in the accommodating space of the fan hub；And

One stator unit includes stator group part；And a rear cover, one end are formed with an open end；Its other end then shape At a closed end；One first assembling grove and one second assembling grove are defined inside the rear cover again；First assembling grove supplies the stator Component assembling；And second assembling grove plugs merging for the outer peripheral edge of the fan hub of the rotor unit；Enabling the stator module be located at should In the accommodating space of the fan hub of rotor unit.

2. the waterproof and dustproof construction of outer rotor fan motor according to claim 1, which is characterized in that wherein, the fan Hub is equipped with an external annulus, is connected to the closed end circumferential perimeter with annular；One internal ring wall is located on the inside of the external annulus by the outer ring Wall surrounds, and is connected to the closed end, causes to form the aforementioned annular space between the external annulus and the internal ring wall, the internal ring wall is then For the aforementioned magnet ring around setting；The external annulus then forms aforementioned this relative to the other end of the closed end with the internal ring wall and opens again Mouth end；And the aforementioned accommodating space is then formed in the internal ring wall.

3. the waterproof and dustproof construction of outer rotor fan motor according to claim 2, which is characterized in that wherein, the fan Hub is integrally formed with those flabellums and is made of plastic cement material；The magnet ring is then that plastic cement projects cladding mode and the fan is arranged in In the accommodating space of the internal ring wall of hub.

4. the waterproof and dustproof construction of outer rotor fan motor according to claim 2, which is characterized in that wherein, the fan The external annulus of hub plugs in the second assembling grove of the rear cover for being placed in the stator unit, radial clearance distance between the two between Between 0.8~1.2mm.

5. the waterproof and dustproof construction of outer rotor fan motor according to claim 2, which is characterized in that wherein, the fan The external annulus of hub plugs in the second assembling grove of the rear cover for being placed in the stator unit, axial gap distance between the two between Between 0.3~0.7mm.

6. the waterproof and dustproof construction of outer rotor fan motor according to claim 2, which is characterized in that wherein, the fan The inner edge surface of the external annulus of hub is equipped with a cut different unit, which is located at the open end.

7. the waterproof and dustproof construction of outer rotor fan motor according to claim 6, which is characterized in that wherein, this is fixed First assembling grove of the rear cover of subelement is equipped with an at least groove along outer peripheral edge；And the external annulus of the groove and the fan hub Cut different unit is in corresponding states.

8. the waterproof and dustproof construction of outer rotor fan motor according to claim 1, which is characterized in that wherein, this is fixed Sub-component has an ontology, is equipped with an axis hole；One first frame, be arranged in the ontology one end and for being assembled in the rear cover the In one assembling grove, which is equipped with one first accommodating hole；One second frame is arranged at the ontology other end, this second Frame is equipped with one second accommodating hole；An at least bearing is separately positioned in the first accommodating hole of first frame and second frame In second accommodating hole of frame；One shaft is plugged in the bearing of the first accommodating hole of first frame, and sequentially across the ontology The axis hole that is set at axis hole, the bearing of the second accommodating hole of second frame and the closed end of the fan hub of the rotor unit and expose Outside the fan hub.

9. the waterproof and dustproof construction of outer rotor fan motor according to claim 8, which is characterized in that wherein, be located at Shaft end outside the fan hub is formed with a threaded area, and arranges in pairs or groups a locking part screw lock at the threaded area, enables the shaft in solid Determine rotation status.

10. the waterproof and dustproof construction of outer rotor fan motor according to claim 9, which is characterized in that wherein, the fan Hub is further provided with a central siphon, is pivoted for the shaft, which is located in the accommodating space of the fan hub, and is connected to the fan hub Closed end, the central siphon are equipped with an axis hole, and the axis hole of the axis hole of the central siphon closed end is in communicating, to give pivot for the shaft If.