CN222479004U - Assembly structure of outer rotor fan - Google Patents

Abstract

The utility model provides an assembly structure of an outer rotor fan, including an outer rotor motor body arranged on one side of a base, an electric control unit arranged on the other side of the base, the outer rotor motor body including a main shaft and a motor stator sleeved on the main shaft, a rotor assembly arranged outside the motor stator, a cylindrical connecting cover arranged outside the rotor assembly, the inner side wall of the connecting cover is tightly fitted with the rotor assembly, an annular blade seat is sleeved on the outer side wall of the connecting cover, and the connecting cover and the blade seat are fixedly connected in a direction perpendicular to the side wall of the connecting cover. The utility model makes the connection between the connecting cover and the blade seat more firm, and further simplifies the assembly process, saving the production cost of the enterprise.

Description

Assembly structure of outer rotor fan

Technical Field

The utility model relates to the field of fans, in particular to an assembly structure of an outer rotor fan.

Background

The traditional motor is characterized in that a stator is outside, and a rotor rotates to generate power. The outer rotor motor is of an opposite structure, the stator is arranged in the middle of the motor, and the rotor is arranged outside. The outer rotor fan adopts an advanced structure and reasonable pneumatic design of directly driving the impeller by an outer rotor motor, and has the characteristics of high efficiency, low noise, light weight, compact structure, convenient installation and maintenance and the like.

The utility model patent of publication No. CN220470259U discloses an improved external rotor fan, which comprises a base, an oil-containing bearing, a stator assembly, a rotor and a fan blade assembly, wherein a tubular mounting seat is arranged on the upper side of the base, a magnet is arranged at the bottom of an inner cavity of the mounting seat, the stator assembly is arranged on the outer side of the mounting seat along the circumferential direction, the fan blade assembly comprises a blade seat with a downward opening, at least three fan blades are uniformly arranged on the outer wall of the blade seat along the circumferential direction, and a metal fan blade shaft is arranged on the lower side of an upper end cover of the blade seat.

However, the following defects are existed in the scheme, firstly, the side wall of the rotor is directly connected and fixed with the blade seat in the same direction of centrifugal force, the fixing mode is not affected when the rotor rotates at low speed and the area difference between the rotor and the blade body on the blade seat is not large, but if the rotor needs to rotate at high speed, and meanwhile, when the volume of the rotor is greatly different from the area of the blade body on the blade seat, the rotor drives the blade seat to rotate, and then, the rotor and the blade seat are driven to generate great centrifugal force, so that the connection between the rotor and the blade seat is unstable (the rotor and the blade seat cannot be integrally formed from the angle of materials), the rotor and the blade seat can not fall off, secondly, the rotor is directly assembled with the blade seat in the prior art, the assembling process is complex, finally, the rotor and the rotor is tightly assembled with the blade seat, and no gap exists between the rotor and the rotor can not spread out through the blade seat even though the rotor is rotated at high speed due to the material problem of the blade seat.

Disclosure of utility model

In order to solve the above problems, the present application provides an assembly structure of an external rotor fan, which can satisfy the stability of connection of a rotor with external components and good heat dissipation on the basis of high-speed rotation of the rotor and miniaturization of the rotor, and more particularly, an assembly structure of an external rotor fan, comprising an external rotor motor body arranged on one side of a base, an electric control unit arranged on the other side of the base, the outer rotor motor body comprises a main shaft and a motor stator sleeved on the main shaft, a rotor assembly is sleeved outside the motor stator, a cylindrical connecting cover is arranged outside the rotor assembly, the inner side wall of the connecting cover is tightly attached to the rotor assembly, an annular blade seat is sleeved on the outer wall of the side wall of the connecting cover, and the connecting cover is fixedly connected with the blade seat in the direction perpendicular to the side wall of the connecting cover.

Further, the connection cover further includes a top surface on which a first through hole is provided, and the spindle is inserted into the first through hole when the connection cover is assembled with the rotor assembly.

Furthermore, one end of the side wall far away from the top surface extends outwards to form a connecting surface, the connecting surface is perpendicular to the side wall and is separated from the base, the blade seat comprises an inner ring, an outer ring and a connecting groove between the inner ring and the outer ring, and the connecting groove is mutually fixed with the connecting surface in a direction perpendicular to the side wall through a bolt structure.

Further, the blade seat further comprises an inner ring and an outer ring, the inner ring is attached to the outer portion of the side wall, and integrally formed wind blades are arranged on the outer portion of the outer ring.

Further, a second through hole is formed in the connecting surface, and a first through groove is formed in the connecting groove.

Further, the rotor assembly and the connecting cover are integrally formed.

Furthermore, a top cover is further arranged at one end, far away from the connecting surface, of the blade seat, a second through groove is further formed in the connecting groove, and a connecting rod matched with the second through groove in shape is arranged on one side of the top cover.

Further, the connecting rod has inward elasticity.

Further, the connecting groove is also provided with a bump, and the top cover is provided with a third through hole matched with the bump in shape.

Furthermore, a plurality of raised strips are arranged on the inner ring of the blade seat according to preset intervals, the top cover is provided with an outer concave shape, and a gap surrounding the connecting cover is formed between the connecting cover and the blade seat and the top cover.

Compared with the prior art, the utility model has the beneficial effects that:

compared with the prior art, the application has the advantages that:

1. Compared with the prior art, in the application scenario of this scheme, for example, in the outer rotor motor body needs miniaturization and high-speed rotation, rotor subassembly in this scheme links to each other with the blade seat through the junction housing, thereby avoided rotor subassembly and blade seat to link to each other directly and can cause the influence to rotor subassembly, secondly, link to each other between junction housing and the blade seat is not the lateral wall links to each other with the blade seat inner wall, but between through setting up the junction surface and the blade seat of perpendicular to junction housing lateral wall, form and form fixedly with the direction of perpendicular to rotor subassembly, like this when rotor subassembly carries out high-speed rotation, because the direction of connection of junction housing and blade seat can be perpendicular with the direction of centrifugal force, can furthest avoid the influence that centrifugal force is connected between junction housing and the blade seat like this, thereby further increased the steadiness that both link to each other.

2. In addition, in the assembly process, when the scheme is assembled, the rotor assembly is connected with the blade seat through the connecting cover, the rotor assembly and the connecting cover can be designed into an integrated form (the rotor assembly and the blade seat can not be designed into an integrated form almost due to the problem of material compatibility in the prior art), the connecting cover is assembled, then the blade seat is assembled outside the connecting cover, and the connecting cover is fixed between the rotor assembly and the blade seat through the screw rod, so that the stability of the connection between the blade seat and the connecting cover is enhanced, the assembly process is further simplified, and the production cost of enterprises is saved.

3. In this embodiment, the outer rotor motor body generates heat when rotating at a high speed, and the heat can flow out from between the connection cover and the base along with the rotation of the rotor assembly, so as to perform a preliminary heat dissipation function, and meanwhile, the connection cover generates heat due to the heat, and the rotor assembly rotates to generate wind, and after flowing out from between the connection cover and the base, a part of the wind flows into a gap between the connection cover and the blade seat and the top cover, so that a further heat dissipation function is performed on the connection cover.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an exploded view of the overall structure of the assembly structure of the outer rotor fan of the present utility model;

FIG. 2 is an overall construction view of a connection cover of an assembly structure of an outer rotor fan of the present utility model;

FIG. 3 is an overall construction view of a blade mount of the assembled structure of the outer rotor fan of the present utility model;

FIG. 4 is an overall construction view of a top cover of an assembly structure of an outer rotor fan of the present utility model;

Fig. 5 is a sectional view of an assembly structure of an outer rotor fan of the present utility model.

Reference numerals and names in the drawings are as follows:

The motor comprises a base 30, an outer rotor motor body 10, an electric control unit 20, a main shaft 11, a motor stator 12, a rotor assembly 13, a connecting cover 100, a side wall 110, a top surface 120, a first through hole 121, a connecting surface 130, a blade seat 200, an inner ring 210, an outer ring 220, a connecting groove 230, a blade 221, a second through hole 131, a first through groove 231, a screw 40, a top cover 300, a second through groove 232, a connecting rod 310, a bump 233, a third through hole 320, a convex strip 211 and a gap 50.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, an assembly structure of an external rotor fan includes an external rotor motor body 10 disposed on one side of a base 30, an electric control unit 20 disposed on the other side of the base 30, the external rotor motor body 10 including a main shaft 11 and a motor stator 12 sleeved on the main shaft 11, a rotor assembly 13 sleeved on the motor stator 12, the motor stator 12 being electrically connected with the electric control unit 20, and generating a magnetic field when the motor stator 12 is energized to drive the rotor assembly 13 to rotate around the motor stator 12.

As shown in fig. 1 and 2, a cylindrical connection cover 100 is disposed outside the rotor assembly 13, and the connection cover 100 is tightly connected with the rotor assembly 13, and when the rotor assembly 13 rotates, the connection cover 100 is driven to synchronously rotate.

As shown in fig. 1 and 2, the connection cover 100 includes a side wall 110 and a top surface 120, the side wall 110 is closely attached to the rotor assembly 13, a first through hole 121 is provided on the top surface 120, and when the connection cover 100 is assembled with the rotor assembly 13, the main shaft 11 is inserted into the first through hole 121, so that a guiding effect is provided for the assembly between the connection cover 100 and the rotor assembly 13.

As shown in fig. 2 and fig. 3, a connection surface 130 is extended outwards from one end of the side wall 110 far away from the top surface 120, the connection surface 130 is perpendicular to the side wall 110 and is spaced from the base 30, an annular blade seat 200 is sleeved on the outer wall of the side wall 110 of the connection cover 100, the blade seat 200 comprises an inner ring 210, an outer ring 220 and a connection groove 230 between the inner ring 210 and the side wall 110, an integrally formed blade 221 is arranged outside the outer ring 220, when the blade seat 200 is assembled with the connection cover 100, the inner ring 210 is attached to the side wall 110, the connection groove 230 is fixed with the connection surface 130 in a direction perpendicular to the side wall 110 through a bolt structure, and thus the blade seat 200 is fixed with the connection cover 100 in a direction perpendicular to the rotor assembly 13.

In this way, in the application scenario of the solution, for example, in the case that the outer rotor motor body 10 needs to be miniaturized and rotates at a high speed, the rotor assembly 13 in the solution is connected with the blade seat 200 through the connection cover 100, so that the influence possibly caused to the rotor assembly 13 due to the direct connection between the rotor assembly 13 and the blade seat 200 is avoided, and secondly, the connection between the connection cover 100 and the blade seat 200 is not the connection between the side wall 110 and the inner wall of the blade seat 200, but the connection surface 130 perpendicular to the side wall 110 of the connection cover 100 and the blade seat 200 is arranged, so that the connection is formed and fixed in the direction perpendicular to the rotor assembly 13, and thus, when the rotor assembly 13 rotates at a high speed, the connection direction of the connection cover 100 and the blade seat 200 is perpendicular to the direction of the centrifugal force, so that the influence of the connection between the centrifugal force and the connection cover 100 and the blade seat 200 is avoided to the greatest extent, and the stability of the connection between the connection is further increased.

As shown in fig. 2 and 3, a second through hole 131 is formed in the connection surface 130, a first through groove 231 is formed in the connection groove 230, and when the blade mount 200 is assembled with the connection cover 100, the first through groove 231 is aligned with the second through hole 131, and then the blade mount 200 is fixedly coupled with the connection cover 100 by passing through the first through groove 231 and the second through hole 131 by using the screw 40.

From the above assembling process, it can be seen that, when the rotor assembly 13 is assembled by the present embodiment, the rotor assembly 13 is connected with the blade seat 200 through the connection cover 100, and the rotor assembly 13 and the connection cover 100 can be designed into an integrated form (in the prior art, the rotor assembly 13 and the blade seat 200 can not be designed into an integrated form almost due to the material compatibility problem), so that the connection cover 100 is assembled, then the blade seat 200 is assembled outside the connection cover 100, and then the connection cover 100 is fixed by the screw 40, so that the assembling process is further simplified while the connection stability of the blade seat 200 and the connection cover 100 is enhanced, and the production cost of enterprises is saved.

Further, as shown in fig. 4, a top cover 300 is further disposed at an end of the blade seat 200 away from the connection surface 130, the top cover 300 is fixedly connected with the blade seat 200 through a buckle, specifically, a second through groove 232 is further disposed on the connection groove 230, a connecting rod 310 matched with the second through groove 232 is disposed at one side of the top cover 300, when the top cover 300 needs to be mounted on the blade seat 200, the connecting rod 310 is only required to be inserted into the second through groove 232, preferably, the connecting rod 310 has a certain elasticity in an inward direction, so that the connecting rod 310 can be better clamped inside the second through groove 232 after being inserted into the second through groove 232.

Furthermore, the connecting groove 230 is further provided with a protruding point 233, and the top cover 300 is provided with a third through hole 320 matching the protruding point 233, and when the top cover 300 is mounted on the blade seat 200, the protruding point 233 is inserted into the third through hole 320, so that the top cover 300 is well matched with the connecting rod 310 to form a limit on the circumferential surface, and thus, falling off from the blade seat 200 when the top cover 300 rotates can be well avoided.

Referring to fig. 1, the top cover 300 completely covers the end of the blade seat 200 away from the connection surface 130, so that moisture or other impurities can be prevented from entering from the end of the blade seat 200, thereby affecting the rotation of the rotor assembly 13.

As shown in fig. 1 and 5, it is preferable that a plurality of protrusions 211 are provided on the inner ring 210 of the blade holder 200 at predetermined intervals, so that when the inner ring 210 of the blade holder 200 is attached to the connection cover 100, a gap 50 is formed between the inner ring 210 and the connection cover 100, thereby allowing air to flow, the top cover 300 has an outer concave shape, so that after the top cover 300 is installed in place, a gap 50 is formed between the connection cover 100 and the top cover 300, and the gap between the blade holder 200 and the connection surface 130 is also adjustable due to the bolt structure connection between the blade holder 200 and the connection surface 130, and when the gap between the blade holder 200 and the connection surface 130 is also formed, a gap 50 is formed between the connection cover 100 and the blade holder 200 and the top cover 300 around the connection cover 100, and also due to the connection surface 130 being perpendicular to the side wall 110 and the distance between the connection surface 130 and the base 30, thus, in this embodiment, the outer rotor motor body 10 generates heat when rotating at a high speed, and the heat generates wind along with the rotation of the rotor assembly 13 to flow out from between the connection cover 100 and the base 30, so as to perform a preliminary heat dissipation function, and at the same time, the rotor assembly 13 rotates to generate wind, and after flowing out from between the connection cover 100 and the base 30, a part of the wind flows into the gap 50 formed between the connection cover 100 and the blade seat 200 and the top cover 300 around the connection cover 100, so as to perform a further heat dissipation function on the connection cover 100, and it should be noted that in the case of this embodiment, the connection surface 130 is not only used to provide a connection in a vertical direction for a fan blade seat, but also the space between the connection surface 130 and the fan blade seat is adjustable, the connection surface 130 also serves to assist in dissipating heat from the connection housing 100.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The assembly structure of the outer rotor fan is characterized by comprising an outer rotor motor body (10) arranged on one side of a base (30), an electric control unit (20) is arranged on the other side of the base (30), the outer rotor motor body (10) comprises a main shaft (11) and a motor stator (12) sleeved on the main shaft (11), a rotor assembly (13) is sleeved outside the motor stator (12), a cylindrical connecting cover (100) is arranged outside the rotor assembly (13), the inner side wall (110) of the connecting cover (100) is tightly attached to the rotor assembly (13), an annular blade seat (200) is sleeved on the outer wall of the side wall (110) of the connecting cover (100), and the connecting cover (100) is fixedly connected with the blade seat (200) in the direction perpendicular to the side wall (110) of the connecting cover (100).

2. The assembling structure of an outer rotor fan according to claim 1, wherein the connection cover (100) further includes a top surface (120), a first through hole (121) is provided on the top surface (120), and the main shaft (11) is inserted into the first through hole (121) when the connection cover (100) is assembled with the rotor assembly (13).

3. The assembly structure of an external rotor fan according to claim 2, wherein a connection surface (130) is extended outwardly at an end of the side wall (110) far from the top surface (120), the connection surface (130) is perpendicular to the side wall (110) and is spaced apart from the base (30), the blade seat (200) comprises an inner ring (210), an outer ring (220) and a connection groove (230) therebetween, and the connection groove (230) and the connection surface (130) are fixed to each other by a bolt structure in a direction perpendicular to the side wall (110).

4. The assembly structure of an outer rotor fan according to claim 3, wherein the blade mount (200) further comprises an inner ring (210) and an outer ring (220), the inner ring (210) is attached to the outside of the side wall (110), and the outer ring (220) is provided with integrally formed wind blades (221) at the outside.

5. An assembly structure of an outer rotor fan according to claim 3, characterized in that a second through hole (131) is provided in the connection surface (130), and a first through groove (231) is provided in the connection groove (230).

6. The structure for assembling an external rotor fan according to claim 5, wherein the rotor assembly (13) and the connection cover (100) are integrally formed.

7. The structure according to claim 4, wherein a top cover (300) is further provided at an end of the blade holder (200) away from the connection surface (130), a second through groove (232) is further provided in the connection groove (230), and a connecting rod (310) is provided at one side of the top cover (300) to be in shape-fit with the second through groove (232).

8. The structure for assembling an external rotor fan according to claim 7, wherein said connecting rod (310) has an inward elasticity.

9. The assembling structure of an outer rotor fan according to claim 8, wherein a bump (233) is further provided on the connection groove (230), and a third through hole (320) having a shape matching that of the bump (233) is provided on the top cover (300).

10. The assembling structure of an outer rotor fan according to claim 7, wherein a plurality of protruding strips (211) are provided on the inner ring (210) of the blade holder (200) at predetermined intervals, the top cover (300) has an outer concave shape, and a gap (50) surrounding the connection cover (100) is formed between the connection cover (100) and the blade holder (200) and the top cover (300).