CN218151502U - Axial flow fan - Google Patents

Abstract

The application relates to the technical field of refrigeration equipment, and discloses an axial flow fan which comprises a fan protecting net and a motor structure, wherein an installation area is arranged in the middle of the fan protecting net; the motor structure is arranged in the mounting area, a wire outlet hole is formed in the side part of the top end of the motor structure, and the wire outlet hole is used for allowing a cable to penetrate out; the cable is connected with the fan protecting net and extends from the mounting area to the outer edge of the fan protecting net along the fan protecting net. According to the axial flow fan, the cable is connected with the fan protecting net, so that the cable can be well prevented from moving up and down between the wiring grooves. In windy weather, the cable can be better protected, and the cable is prevented from swinging with the wind or pulling the cable. In addition, the cable extends from the mounting area to the outer edge of the fan protecting net along the fan protecting net, so that the cable is not easy to find, and the appearance of the axial flow fan is more tidy and attractive.

Description

Axial flow fan

Technical Field

The application relates to the technical field of refrigeration equipment, for example to an axial fan.

Background

Partial axial fan, in order to facilitate the assembly, the cable conductor of being connected between motor structure and the wheel hub walks the line safeguard measure and does not target in place, and the cable conductor swings with the wind easily under strong wind environment, perhaps appears the problem that the cable conductor was dragged easily, and then leads to the wearing and tearing of motor line, causes the problem that the motor was burnt out to the motor short circuit.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an axial flow fan to fix a cable, so that the whole machine is more attractive, and the cable is protected.

In some embodiments, the axial flow fan comprises a fan protecting net and a motor structure, wherein a mounting area is arranged in the middle of the fan protecting net; the motor structure is arranged in the mounting area, a wire outlet hole is formed in the side part of the top end of the motor structure, and the wire outlet hole is used for allowing a cable to penetrate out; the cable is connected with the fan protecting net and extends from the mounting area to the outer edge of the fan protecting net along the fan protecting net.

In some embodiments, the fan protecting net comprises a protecting net body and assembling ribs, wherein a mounting area is arranged in the middle of the protecting net body, and the mounting area is used for enabling the motor structure to be coaxially arranged with the protecting net body; the assembly rib is connected with the protective net body, extends to the mounting area from the outer edge of the protective net body, and is used for connecting the top end of the motor structure with the fan protective net.

In some embodiments, an assembly platform is arranged on the side portion of the top end of the motor structure, an installation groove is formed in the assembly platform and used for accommodating the end portion of the assembly rib, and the assembly platform is used for connecting the motor structure and the fan protection net.

In some embodiments, the assembly rib is in a U-shaped structure and comprises a bending rib and two parallel connecting ribs, a space is arranged between the two connecting ribs, and the bending rib is respectively connected with the end parts of the two connecting ribs and forms a closed end of the assembly rib.

In some embodiments, the cable wires are disposed in the space between the two connecting ribs, and the cable wires are disposed along the mounting ribs.

In some embodiments, two mounting grooves are arranged at intervals, and a positioning boss is formed in the middle of each mounting groove; a pressing piece is arranged on the upper side of the assembling rib at the end part of the mounting area; the fastener penetrates through the pressing piece to be connected with the positioning boss so as to press and fix the assembling rib on an assembling platform of the motor structure.

In some embodiments, the motor structure comprises an arc-shaped bent plate and/or a sheath, wherein the arc-shaped bent plate is arranged along the periphery of the outlet hole and is positioned above the outlet hole, and is used for leading water at the top of the motor structure to the outer side of the outlet hole; the sheath is sleeved outside the cable for preventing the water of the cable.

In some embodiments, the motor structure comprises a motor main body, a first end cover and a second end cover, wherein the first end cover is positioned at the top of the motor main body, and the side part of the motor main body is provided with an outlet hole; the second end cover is located the bottom of motor main part, and the middle part of second end cover is provided with the pilot hole, and the pilot hole is used for motor main part's output to pass.

In some embodiments, the side of the first end cover is provided with a plurality of heat dissipation rib groups, and the heat dissipation rib groups are used for heat dissipation of the motor structure; and/or the side part of the motor main body is provided with a plurality of strip-shaped bulges along the axial direction, and the strip-shaped bulges are used for heat dissipation of the motor structure.

In some embodiments, the axial flow fan further comprises axial flow blades and a flow guide ring panel, wherein the axial flow blades are mounted on the motor structure through a hub; the guide ring panel is connected with the fan protecting net.

The axial flow fan provided by the embodiment of the disclosure can realize the following technical effects:

by adopting the axial flow fan disclosed by the invention, the cable is connected with the fan protecting net, so that the cable can be well prevented from moving up and down between the wiring grooves. In windy weather, the cable can be better protected, and the cable is prevented from swinging with the wind or pulling the cable. In addition, the cable extends from the mounting area to the outer edge of the fan protecting net along the fan protecting net, so that the cable is not easy to find, and the appearance of the axial flow fan is more tidy and attractive.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of an axial flow fan according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of an axial flow fan provided in accordance with an embodiment of the present disclosure;

FIG. 3 is an exploded schematic view of a motor structure provided by the disclosed embodiment;

FIG. 4 is an exploded view of a rotor of an electric machine provided by embodiments of the present disclosure;

FIG. 5 is a schematic diagram of a dynamic balancing weight method for a rotor of an electric machine according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a first end cap provided by the disclosed embodiment;

FIG. 7 is a schematic structural diagram of a motor structure provided in the embodiments of the present disclosure;

FIG. 8 is a schematic structural view of a fan guard provided in accordance with an embodiment of the present disclosure;

FIG. 9 is a schematic structural view of another fan guard provided by embodiments of the present disclosure;

fig. 10 is a schematic structural view of another fan guard provided by the embodiment of the present disclosure.

Reference numerals:

10: a motor structure;

11: a first end cap; 111: a wire outlet hole; 1111: an arc-shaped bent plate; 112: assembling a platform; 1121: mounting grooves; 1122: positioning the boss;

12: a motor main body; 121: a motor rotor; 1211: a rotor core; 1212: pressing a ring by a rotor; 1213: a bearing; 1214: a motor shaft; 1215: a first bump structure; 1216: a second bump structure;

13: a second end cap; 131: a drain hole; 14: a cable wire;

20: a fan protecting net; 21: a protective net body; 211: an installation area; 22: assembling ribs; 23: pressing parts; 24: a connecting member; 25: iron wires;

30: axial flow fan blades; 31: a hub;

40: a deflector ring panel.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The temperature rise is an important performance index of the motor, the temperature rise has great influence on the insulating material of the motor, the insulation aging can shorten the service life of the motor due to overhigh temperature, and even the insulation damage can be caused. In order to prevent the insulation from aging and damage, an irregular limit is made on the temperature of each part of the motor, and the temperature limit is the allowable temperature of the motor.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

The embodiment of the disclosure provides an axial flow fan, which comprises a flow guide ring panel 40, axial flow fan blades 30, a fan guard net 20 and a motor structure 10.

The axial-flow fan blade 30 is installed on the motor structure 10 through the wheel hub 31, the outer portion of the fan protecting net 20 is connected with the flow guide ring panel 40, the middle portion of the fan protecting net 20 is connected with the top of the motor structure 10, and the fan protecting net 20 and the motor structure 10 are coaxially arranged. The motor shaft 1214, the axial flow fan blade 30 and the hub 31 of the motor structure 10 are located inside the fan guard net 20. In this way, the fan protecting net 20 can be used as a protecting net to safely protect the axial flow fan, and can be used as a motor support to support the motor structure 10.

The motor structure 10 includes a motor body 12, a first end cap 11, and a second end cap 13. By adopting the split structure, each part can be conveniently processed, and the production efficiency is improved. The following process route can be adopted during production: firstly, a stator core and a shell are sleeved in a hot mode; then processing the shell seam allowance; and finally, carrying out motor final assembly. Because the hot sleeve and the spigot are different in processing procedures, the spigot is processed after the hot sleeve, so that the concentricity of the motor can be better, and the electromagnetic sound, vibration and the like of the motor can be obviously reduced.

Wherein, motor structure 10's casing adopts tensile aluminium casing, sets up a plurality of heat dissipation rib groups at the lateral part of first end cover 11, and the lateral part of motor main part 12 is provided with a plurality of bar archs along the axial, and heat dissipation rib group and bar arch are used for motor structure 10 heat dissipation to make the motor temperature rise lower relatively. Preferably, the plurality of heat dissipation rib groups are uniformly arranged at the first end cap 11.

The motor body 12 includes a motor rotor 121, the motor rotor 121 is mainly composed of a bearing 1213, a rotor pressing ring 1212, a rotor core 1211 and a motor shaft 1214, and the rotor pressing ring 1212 is a cast aluminum structure.

The number of the rotor pressing rings 1212 is two, the two rotor pressing rings 1212 are respectively located at two ends of the rotor core 1211, a plurality of first protrusion structures 1215 and a plurality of second protrusion structures 1216 are respectively arranged on outer end faces of the two rotor pressing rings 1212, the first protrusion structures 1215 and the second protrusion structures 1216 are arranged at intervals, the first protrusion structures 1215 are used for heat dissipation of the motor structure 10, and the second protrusion structures 1216 are used for dynamic balance adjustment of the motor rotor 121.

The first protrusion structures 1215 may be strip-shaped protrusions; the second protrusion structures 1216 may be cylindrical protrusions. When the motor rotor 121 operates, the strip-shaped protrusions can play a role similar to axial flow fan blades, air inside the motor is driven to flow, the effect of cooling the inside of the motor is achieved, and temperature rise inside the motor can be effectively reduced. First lobe arrangement 1215 and second lobe arrangement 1216 are spaced to reduce the effect of both on the amount of dynamic balance of motor rotor 121. Preferably, the first 1215 and second 1216 bump structures are uniformly disposed on the outer end surface of the rotor clamping ring 1212, respectively.

The existing method adopts a dead weight method to adjust the dynamic balance of the rotor, and a two-plane separation method is commonly used for separating the unbalance, namely, the unbalance of the rotor is removed through the superposition of the unbalance caused by the weight increase and decrease of two planes, so as to achieve the adjustment of the unbalance of the rotor. In the scheme, the scheme of cutting the cylindrical bulge at the position corresponding to the rotor pressing ring 1212 is adopted to adjust the dynamic balance of the rotor. The reason for selecting the aluminum material for the rotor clamping ring 1212 is mainly based on the physical characteristics of the aluminum material that is easy to process and easy to cut, which facilitates the production of the rotor clamping ring 1212 and facilitates the removal of the second protrusion 1216 when the dynamic balance adjustment weight is applied.

The embodiment of the present disclosure provides a dynamic balance weight method for the motor rotor 121 as described above, which performs dynamic balance adjustment through a weight removal method. Specifically, the motor rotor 121 may be dynamically balanced by reducing the number or weight of the second projection structures 1216.

The dynamic balance weight method comprises the following steps:

s01, the dynamic balancing machine obtains the dynamic balance state of the motor rotor 121;

s02, under the condition that the motor rotor 121 is in an unbalanced state, the dynamic balancing machine determines a target position needing dynamic balance adjustment;

s03, the user or the cutting device adjusts the dynamic balance of the motor rotor 121 by adjusting the weight of the second protrusion 1216 on the rotor pressing ring 1212 at the corresponding target position.

According to the dynamic balance weight balancing method, the position of a point needing dynamic balance adjustment is accurately positioned by testing the dynamic balance state of the rotor on the dynamic balancing machine, and then adjustment is carried out by removing the excessive weight of the bulge on the rotor pressing ring 1212, so that the dynamic balance precision requirement is met. The motor rotor 121 is provided with a corresponding dynamic balance weight adjusting method, so that the reliability and quality stability of the motor can be further improved.

In step S03, the user or the cutting device adjusts the dynamic balance of the motor rotor 121 by adjusting the weight of the second protrusion 1216 corresponding to the target position on the rotor pressing ring 1212, including adjusting the dynamic balance of the motor rotor 121 by reducing the weight of the second protrusion 1216 corresponding to the target position on the rotor pressing ring 1212.

This kind of counter weight mode is fine has solved traditional mode through adding the balancing weight to electric motor rotor 121 and adjusting electric motor rotor 121's dynamic balance state, can prevent because of the balancing weight assembly is not firm, drops inside the motor, leads to the short circuit to appear in the inside coil of motor, and then burns out the phenomenon emergence of motor, has improved the reliability of motor and the convenience of electric motor rotor 121 counter weight.

The first end cover 11 is positioned at the top of the motor main body 12, a wire outlet hole 111 and an assembly platform 112 are arranged on the side part, and the wire outlet hole 111 is used for the cable 14 to pass through; a sheath is sleeved outside the cable 14 and used for preventing the cable 14 from being water; the arc-shaped bending plate 1111 is arranged along the periphery of the wire outlet hole 111, and the arc-shaped bending plate 1111 is located above the wire outlet hole 111, similar to a eave structure, and is used for leading water on the first end cover 11 to the outer side of the wire outlet hole 111. This kind of mode of setting up can effectively improve motor structure 10 to the adaptation degree of rainwater environment to reduce the rainwater and follow the inside possibility of cable leading-out portion entering motor casing, extension motor life.

This disclosed axial fan makes motor shaft 1214 install down when the assembly, owing to form certain ponding on the bottom end cover of motor easily under high humid environment to can be along the end cover down, inside the wire hole 111 infiltrates the motor, this scheme is on the basis that cable overcoat sheath carries out sealed protection, increases arc bent plate 1111 again and can play the secondary guard action.

As an example, the curved plate 1111 protrudes from a side portion of the first end cap 11, is integrally formed with the first end cap 11, and has a rectangular longitudinal section.

As another example, the arc center angle of the arc-shaped bending plate 1111 is greater than or equal to pi, so that water on the first end cap 11 can be prevented from dripping onto the cable wires 14 along the arc-shaped bending plate 1111 and then seeping into the interior of the motor through the outlet hole 111.

The second end cover 13 is located at the bottom of the motor main body 12, and a fitting hole is formed in the middle of the second end cover 13 and used for penetrating through an output end of the motor main body 12. The end surface of the second end cover 13 is provided with a plurality of water drainage holes 131, and the water drainage holes 131 are used for draining water vapor inside the motor.

The middle part of the fan protecting net 20 is provided with a mounting area 211, and the motor structure 10 is mounted in the mounting area 211. The cable 14 passes through the outlet hole 111 and extends along the fan guard 20 from the mounting region 211 to the outer edge of the fan guard 20. Preferably, the cable 14 is connected to the fan guard 20 to prevent the cable 14 from moving up and down between the raceways. In windy weather, cable 14 may be better protected against windy sways of cable 14 or pulling of cable 14.

The side portion of the first end cover 11 is provided with an assembling platform 112, the assembling platform 112 is provided with an installation groove 1121, the installation groove 1121 is used for accommodating an end portion of the assembly rib 22, and the assembling platform 112 is used for connecting the motor structure 10 and the fan protecting net 20.

The fan protecting net 20 comprises a protecting net body 21, an assembling rib 22 and a pressing piece 23. A mounting area 211 is reserved in the middle of the protecting net body 21, and the mounting area 211 is used for enabling the motor structure 10 of the axial flow fan and the protecting net body 21 to be coaxially arranged; the assembling ribs 22 are connected with the protecting net body 21, the assembling ribs 22 extend from the outer edge of the protecting net body 21 to the mounting area 211, and the assembling ribs 22 are used for connecting the protecting net body 21 with the motor structure 10.

The assembling rib 22 is of a U-shaped structure and comprises a bending rib and two parallel connecting ribs, an interval is arranged between the two connecting ribs, and the bending rib is respectively connected with the end parts of the two connecting ribs and forms a closed end of the assembling rib 22. The closed end of the assembling rib 22 is positioned at the outer edge of the protecting net body 21, the inner side of the closed end is provided with a connecting piece 24, the connecting piece 24 is used for being connected with the deflector panel 40, and the open end of the assembling rib 22 is positioned in the mounting area 211 of the protecting net body 21. The pressing piece 23 is located on the upper side of the opening end of the fitting rib 22. The pressing member 23 may be a sheet structure similar to a washer or a column structure similar to a bolt, so as to press the assembling rib 22 and allow a fastener to pass through.

The two mounting grooves 1121 are arranged, the two mounting grooves 1121 are arranged at intervals, a positioning boss 1122 is formed in the middle of the two mounting grooves 1121, and the positioning boss 1122 is used for being matched with the pressing piece 23 to compress the assembling rib 22 and fix the mounting grooves 1121.

The fastener penetrates through the pressing piece 23 and the interval between the two connecting ribs at the opening end and is connected with the positioning boss 1122 of the assembly platform 112, so that the assembly rib 22 is pressed and fixed on the assembly platform 112 of the motor structure 10, and the fan guard net 20 is connected with the motor structure 10.

The assembly ribs 22 are located on the outer side of the protecting net body 21, so that the fan protecting net 20 can be conveniently processed, and the fan protecting net 20 can be strengthened. It is furthermore possible to arrange the cable wires 14 along the assembly ribs 22 in the space between two connecting ribs.

The assembling ribs 22 are welded with iron wires 25 perpendicular to the routing direction of the cable 14, and the cable 14 penetrates through the lower parts of the iron wires 25, so that at least part of the cable 14 can be fixed on the fan guard 20.

The assembling ribs 22 are provided with a plurality of groups, and the assembling ribs 22 are uniformly arranged around the protecting net body 21.

The arrangement of the assembly rib 22, on the one hand, strengthens the strength of the end portion 11 of the motor structure 10, on the other hand, only needs to correspond the position of the assembly platform 112 of the motor structure 10 and the assembly rib 22 during assembly, then directly clamps the end portion of the assembly rib 22 into the mounting groove 1121, does not need to specially go to positioning, and then utilizes the pressing piece 23 and the fastening piece to position, so that the connection of the fan guard net 20 and the motor structure 10 can be realized. Therefore, the assembly relation between the mesh cover and the motor is more reliable and faster, particularly, the concentricity between the motor and the fan guard net 20 and between the guide rings is fully ensured during production and assembly, the assembly error is reduced, blind operation can be realized, and the production and assembly efficiency is greatly accelerated.

As an example, the cross section of the fitting rib 22 is circular, and it is made of carbon steel.

As another example, the protecting net body 21 includes an annular ring group and a reinforcing rib, the annular ring group includes a plurality of coaxially arranged annular rings, the diameters of the plurality of annular rings are gradually reduced from outside to inside, and the reinforcing rib connects the plurality of annular rings one by one.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. An axial flow fan, comprising:

the middle part of the fan guard net (20) is provided with a mounting area (211);

the motor structure (10) is installed in the installation area (211), a wire outlet hole (111) is formed in the side portion of the top end of the motor structure (10), and the wire outlet hole (111) is used for enabling a cable wire (14) to penetrate out;

the cable (14) is connected with the fan protecting net (20), and the cable (14) extends from the mounting area (211) to the outer edge of the fan protecting net (20) along the fan protecting net (20).

2. The axial fan according to claim 1, characterized in that said fan guard (20) comprises:

the middle part of the protective net body (21) is provided with the mounting area (211), and the mounting area (211) is used for enabling the motor structure (10) and the protective net body (21) to be coaxially arranged;

the assembling rib (22) is connected with the protecting net body (21), the assembling rib (22) extends to the mounting area (211) from the outer edge of the protecting net body (21), and the assembling rib (22) is used for connecting the top end of the motor structure (10) with the fan protecting net (20).

3. The axial flow fan according to claim 2,

an assembling platform (112) is arranged on the side portion of the top end of the motor structure (10), an installing groove (1121) is formed in the assembling platform (112), the installing groove (1121) is used for containing the end portion of the assembling rib (22), and the assembling platform (112) is used for connecting the motor structure (10) and the fan protecting net (20).

4. The axial flow fan according to claim 3,

the assembly rib (22) is in a U-shaped structure and comprises a bending rib and two parallel connecting ribs,

and a space is arranged between the two connecting ribs, and the bending rib is respectively connected with the end parts of the two connecting ribs to form a closed end of the assembling rib (22).

5. The axial flow fan according to claim 4,

the cable (14) is arranged in the interval between the two connecting ribs, and the cable (14) is arranged along the assembling rib (22).

6. The axial flow fan according to claim 4,

the number of the mounting grooves (1121) is two, and the two mounting grooves (1121) are arranged at intervals and form a positioning boss (1122) in the middle;

a pressing piece (23) is arranged on the upper side of the assembling rib (22) at the end part of the mounting area (211);

and a fastener penetrates through the pressing piece (23) to be connected with the positioning boss (1122) so as to press and fix the assembling rib (22) on the assembling platform (112) of the motor structure (10).

7. The axial fan according to any one of claims 1 to 6, characterized in that said motor structure (10) comprises:

the arc-shaped bent plate (1111) is arranged along the periphery of the outlet hole (111), is positioned above the outlet hole (111), and is used for guiding water at the top of the motor structure (10) to the outer side of the outlet hole (111); and/or the presence of a gas in the gas,

and the sheath is sleeved outside the cable (14) and used for preventing the cable (14) from being water.

8. The axial fan according to any one of claims 1 to 6, characterized in that said motor structure (10) comprises:

a motor main body (12);

the first end cover (11) is positioned at the top of the motor main body (12), and the side part of the first end cover is provided with the wire outlet hole (111);

the motor is characterized by comprising a second end cover (13) located at the bottom of the motor main body (12), wherein a mounting hole is formed in the middle of the second end cover (13), and the mounting hole is used for enabling the output end of the motor main body (12) to penetrate through.

9. The axial flow fan according to claim 8,

the side part of the first end cover (11) is provided with a plurality of heat dissipation rib groups, and the heat dissipation rib groups are used for dissipating heat of the motor structure (10); and/or the presence of a gas in the gas,

the lateral part of the motor main body (12) is provided with a plurality of strip-shaped bulges along the axial direction, and the strip-shaped bulges are used for heat dissipation of the motor structure (10).

10. The axial flow fan according to any one of claims 1 to 6, further comprising:

the axial flow fan blade (30) is arranged on the motor structure (10);

and the flow guide ring panel (40) is connected with the fan protecting net (20).

Images