CN218958704U - High-speed mute fan motor - Google Patents

Abstract

The utility model discloses a high-speed mute fan motor which comprises a shell, a rotor, a stator assembly and a bearing support, wherein the stator assembly and the bearing support are sequentially sleeved and fixed inside the shell in a coaxial mode, a first bearing and a second bearing are coaxially arranged at two ends of the bearing support, an inner iron core is inlaid in the bearing support at intervals, two ends of the rotor are arranged on the first bearing and the second bearing, a penetrating air channel is arranged between the outer wall of the stator assembly and the inner wall of the shell, an impeller is fixedly arranged at the exposed end of the rotor, and air guide sheets are arranged at intervals on the inner wall of the air channel. The first bearing and the second bearing are integrally arranged coaxially, so that the rotor installation tolerance is reduced, the vibration of the rotor rotating at a high speed is small, the bearing is stressed uniformly, the service life of the bearing is prolonged, the mute effect of the motor during operation is greatly improved, meanwhile, the winding assembly is used for sequentially horizontally rotating the winding after being unfolded, the winding efficiency is greatly improved, and the novel high-speed motor winding device is simple in structure, convenient to assemble, high in precision and substantial in characteristics and improvement.

Description

High-speed mute fan motor

Technical Field

The utility model relates to the technical field of motors, in particular to a high-speed mute fan motor.

Background

As is well known, the rotational speed of the existing high-speed fan motor is very high (the rotational speed is up to more than hundred thousand RPM) when the motor works, so that the requirement on the dynamic balance precision of the rotor is very high.

At present, the bearing of the existing high-speed fan motor is usually arranged between the impeller and the magnetic ring, if the two bearings are taken as supporting points, the bearing and the magnetic ring form a cantilever structure, and the unbalance quantity formed by the magnetic ring and the shaft is larger because of the dimensional accuracy of a single magnetic ring and the technical level limit of the installation of the magnetic ring and the shaft, so that the unbalance quantity can cause vibration noise when the high-speed fan motor runs at high speed, and under the cantilever structure formed by the bearing placement structure, the vibration generates larger radial force on the two bearings, and the bearing is easy to damage when the high-speed fan motor runs for a long time; in addition, the bearing is placed on two sides of the magnetic ring, and the bearing and the magnetic ring form a simple beam structure, so that vibration and noise generated by unbalance of the magnetic ring can be well restrained, but at present, the bearing is usually fixed by using a front end cover and a rear end cover, so that the concentricity of the front end cover and the rear end cover is poor due to the influence of assembly tolerance, for example: chinese patent No. CN201921475028.5 discloses a high-speed fan motor, in which the stator is secondarily mounted at the tail of the housing, resulting in poor concentricity of the assembled first bearing, second bearing and third bearing, and the bearings are also easy to be damaged and generate noise under long-time operation; in addition, the existing stator winding generally adopts rotary inserting winding type winding, the space in the stator winding is quite narrow, the winding speed is slow, and the production efficiency of a motor stator is greatly influenced, so the defects are quite obvious, and therefore, the high-speed mute fan motor is provided for solving the problems.

Disclosure of Invention

In view of the above-mentioned shortcomings in the prior art, an object of the present utility model is to provide a high-speed mute fan motor.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a fan motor of high-speed silence, includes shell, rotor, stator module and is hollow form bearing support, stator module, bearing support cover in proper order concentric center are established and are fixed in the shell inside, first bearing and second bearing are installed to the both ends concentric center of bearing support, the interval is inlayed in the bearing support has interior iron core, rotor both ends rotationally insert respectively and locate first bearing and second bearing's hole department, be provided with the wind channel that runs through between stator module's the outer wall and the shell inner wall, the impeller that the exposed end and the being located shell of rotor are relative with wind channel position fixed mounting, wind channel inner wall interval is provided with the wind guide piece along rotor axial direction and the incline direction is the same.

Preferably, the stator assembly comprises at least two winding assemblies which are connected with each other and can be spliced into a round shape, the winding assemblies comprise an arc-shaped insulating support, windings and an outer iron core, the windings are fixedly arranged on the insulating support, the outer iron core is inlaid in the insulating support, and one end of the outer iron core penetrates through an inner hole of the windings and is exposed out of the outer surface of the insulating support.

Preferably, a positioning groove for installing the winding is arranged on the insulating bracket.

Preferably, both ends of the inner iron core are exposed out of the inner wall and the outer surface of the bearing bracket, and one end of the outer iron core is mutually attached to one end of the inner iron core.

Preferably, the outer iron core and the inner iron core are in a T shape, and the narrow ends of the outer iron core and the inner iron core are mutually attached.

Preferably, deformation parts are connected between adjacent outer iron cores, and deformation grooves and material reducing grooves are respectively formed in the upper ends and the lower ends of the deformation parts.

Preferably, one end of the insulating support is provided with a pin piece electrically connected with the winding, and the pin piece is soldered with a terminal circuit board.

Preferably, one end of the insulating support is provided with a Y-shaped protection column, and one end of the pin piece is inlaid in the protection column.

Preferably, the two ends of the bearing support are provided with limiting grooves which are coaxially arranged, and the first bearing and the second bearing are fixedly arranged in the limiting grooves through glue.

Preferably, a glue filling groove is formed in the limiting groove.

By adopting the scheme, compared with the prior art, the utility model has the following obvious advantages and beneficial effects:

1. firstly, the first bearing and the second bearing are coaxially and integrally arranged at two ends of the bearing bracket, so that the coaxiality and concentricity tolerance of the first bearing and the second bearing after being arranged are greatly reduced, two ends of the rotor are rotatably inserted into inner holes of the first bearing and the second bearing, therefore, when the rotor rotates at a high speed, the rotor is always in dynamic balance rotation, vibration of the rotor during high-speed rotation is effectively reduced, noise of the fan motor during operation is reduced, two ends of the rotor are uniformly received by the first bearing and the second bearing, the installation structure of a rotor cantilever beam is effectively avoided, the first bearing and the second bearing are uniformly stressed, radial force is effectively prevented from being generated on the two bearings during the rotation of the rotor, and the service life of the first bearing and the second bearing is greatly prolonged;

2. secondly, the bearing bracket and the inner iron core are integrally formed through injection molding by a mold, and the two limiting grooves for fixing the first bearing and the second bearing are also formed simultaneously after injection molding by the mold, so that the concentricity of the two limiting grooves can be better ensured, the concentricity of a central line formed by the two limiting grooves and the inner iron core of one circle is effectively improved, and the manufacturing precision of the stator assembly is greatly improved;

3. then, a plurality of winding assemblies of the stator assembly can sequentially wind the windings after being horizontally unfolded, so that the operation space during winding is effectively increased after the winding assemblies are horizontally unfolded, and meanwhile, the winding mode of the existing stator winding is changed from rotary up-down winding into sequential horizontal rotary winding, so that the winding efficiency of the windings is greatly improved, the winding time is reduced, and the production efficiency is increased;

4. finally, the first bearing and the second bearing are integrally arranged on the bearing support, the rotor is arranged between the first bearing and the second bearing, therefore, the first bearing and the second bearing are simultaneously arranged on the bearing support, the stator component is coaxially arranged on the circumferential side surface of the bearing support, and the stator component carries the bearing support and the rotor and is arranged in the shell, so that the assembly tolerance of the first bearing and the second bearing is effectively reduced, the concentricity of the first bearing and the second bearing is increased, the first bearing and the second bearing can also smoothly and coaxially rotate when the rotor rotates at a high speed for a long time, the damage of the bearing during the high-speed operation is prevented, the noise of the first bearing and the second bearing during the high-speed operation is effectively reduced, the mute effect of the motor during the high-speed rotation is further better, the service life of the fan motor is prolonged, the practical use requirement of users is met, the structure is simple, the assembly precision is high, the practical characteristics are realized, and the practical advantages are realized.

Drawings

Fig. 1 is an isometric view of an embodiment of the utility model.

Fig. 2 is a schematic structural view of a terminal circuit board according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of an embodiment of the present utility model.

Fig. 4 is a schematic view showing an expanded structure of the winding assembly according to the embodiment of the present utility model.

Fig. 5 is a schematic view showing the structure of the outer core according to the embodiment of the present utility model.

Fig. 6 is a schematic structural view of a modification of the embodiment of the present utility model.

Fig. 7 is a schematic view of the mounting structure of the outer core and the inner core according to the embodiment of the present utility model.

In the figure:

1. a housing; 2. a rotor; 3. a stator assembly; 4. a bearing support; 5. a first bearing; 6. a second bearing; 7. an inner core; 8. an air duct; 9. an impeller; 10. an air guiding sheet; 11. a winding assembly; 12. an insulating support; 13. a winding; 14. an outer core; 15. a positioning groove; 16. a deformation section; 17. a deformation groove; 18. a material reduction groove; 19. a pin member; 20. a terminal circuit board; 21. a protective column; 22. a limit groove; 23. and (5) a glue filling groove.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper end", "lower end", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 7, the high-speed mute fan motor provided in this embodiment includes a housing 1, a rotor 2, a stator assembly 3 and a hollow bearing support 4, the bearing support 4 is sleeved and fixed at an inner hole of the stator assembly 3, the stator assembly 3 is sleeved and fixed at an inner cavity of the housing 1, so the stator assembly 3 and the bearing support 4 are sequentially coaxially sleeved and fixed inside the housing 1, two ends of the bearing support 4 are coaxially provided with a first bearing 5 and a second bearing 6, an inner iron core 7 is inlaid in the bearing support 4 at intervals, the inner iron core 7 is injection molded in the bearing support 4 through an insert mold, two ends of the rotor 2 are respectively rotatably inserted at the inner holes of the first bearing 5 and the second bearing 6, a penetrating air duct 8 is arranged between an outer wall of the stator assembly 3 and an inner wall of the housing 1, an impeller 9 opposite to the air duct 8 is fixedly mounted in the housing 1, and an air guide piece 10 (as shown in fig. 1 and 2) having the same inclination direction along the axial direction of the rotor 2 is arranged at intervals on the inner wall of the air duct 8.

When the practical tool assembly of the embodiment is carried out, firstly, the rotor 2 is arranged in the inner cavity of the bearing bracket 4, then the first bearing 5 and the second bearing 6 are inserted and arranged at two ends of the rotor 2 and are coaxially and integrally arranged at two ends of the bearing bracket 4, then the stator assembly 3 is inserted and fixed on the peripheral side surface of the bearing bracket 4 through glue, and the impeller 9 is inserted and fixed at the exposed end of the rotor 2; therefore, the first bearing 5 and the second bearing 6 are integrally arranged on the bearing bracket 4, the coaxiality and concentricity tolerance of the first bearing 5 and the second bearing 6 after being arranged are greatly reduced, the installation precision of the first bearing 5 and the second bearing 6 is improved, the two ends of the rotor 2 are rotatably inserted into the inner holes of the first bearing 5 and the second bearing 6, the two ends of the first bearing 5 and the second bearing 6 are balanced, the installation precision of the rotor 2 is higher, therefore, when the rotor 2 rotates at a high speed, the rotor 2 is always in a dynamic balance rotation state, the vibration of the rotor 2 during the high speed rotation is effectively reduced, the noise of a fan motor is reduced, the two ends of the rotor 2 are uniformly received by the first bearing 5 and the second bearing 6, the two-force balance state effectively avoids the traditional cantilever beam installation structure of the rotor 2, the two bearings are uniformly stressed, the radial forces are effectively prevented from being generated when the rotor 2 rotates, and the service lives of the first bearing 5 and the second bearing 6 are greatly prolonged.

Further, the stator assembly 3 of the present embodiment includes at least two winding assemblies 11 which are connected to each other and can be spliced into a circular shape, the winding assemblies 11 include an arc-shaped insulating support 12, a winding 13, and an outer core 14, the winding 13 is fixedly mounted on the insulating support 12, the outer core 14 is embedded in the insulating support 12, and one end of the outer core 14 passes through an inner hole of the winding 13 and is exposed to the outer surface of the insulating support 12. The adjacent winding assemblies 11 can be horizontally unfolded from circular unfolding to in-line type, and when the winding operation of the winding 13 is carried out, the winding mode of the copper wires of the winding 13 is changed from the conventional rotary up-and-down winding to sequential horizontal rotary winding, so that the winding efficiency can be greatly improved, and the winding time can be reduced; after winding the copper wire of the winding 13, the winding assembly 11 is wound on the circumferential side surface of the bearing support 4, so that the stator assembly 3 is coated outside the bearing support 4, and the whole assembly of the stator assembly 3 is also convenient.

Further, the insulating holder 12 of the present embodiment is provided with a positioning groove 15 for mounting the winding 13. Therefore, the copper wire is wound and limited in the positioning groove 15 by utilizing the setting of the positioning groove 15, and is wound into the winding 13, so that the winding 13 is convenient to manufacture, and the winding 13 is effectively limited.

Further, both ends of the inner core 7 of the present embodiment are exposed to the inner wall and the outer surface of the bearing bracket 4, and one end of the outer core 14 is attached to one end of the inner core 7. Therefore, the inner iron core 7 is inlaid in the bearing bracket 4 by adopting an insert injection molding process, the mechanical arm automatic operation can be adopted for manufacturing, the installation accuracy of the inner iron core 7 on the bearing bracket 4 is greatly improved, the inner iron core 7 and the bearing bracket 4 are integrally formed, the assembly quantity of parts is effectively reduced, and the assembly efficiency is increased.

Further, the outer core 14 and the inner core 7 of the present embodiment are each in a T shape, and the narrow ends of the outer core 14 and the inner core 7 are attached to each other (as shown in fig. 7). Therefore, the complete stator core is formed by the outer iron core 14 and the inner iron core 7, the wide end of the inner iron core 7 can be firmly embedded in the bearing bracket 4 by utilizing the T-shaped design of the inner iron core 7, and meanwhile, the wide end of the outer iron core 14 can be firmly embedded in the insulating bracket 12 by utilizing the T-shaped design of the outer iron core 14, so that the embedding stability of the outer iron core 14 and the inner iron core 7 is effectively improved.

Further, in the present embodiment, when the adjacent outer cores 14 are horizontally unfolded, the deformation portions 16 are connected between the adjacent outer cores 14, and the deformation portions 16 are provided with deformation grooves 17 and subtracting grooves 18 at the upper and lower ends, respectively. Therefore, when the adjacent outer iron cores 14 are curled into a round shape, the deformation parts 16 are bent and deformed by external force, and therefore, when the adjacent outer iron cores 14 are bent by the arrangement of the deformation grooves 17, bending interference of two ends of the deformation parts 16 of the adjacent outer iron cores 14 is effectively avoided, when the adjacent outer iron cores 14 are bent, the deformation grooves 17 act similarly to bending grooves reserved when metal plates are bent, and the material area of the deformation parts 16 is effectively reduced by the arrangement of the material reducing grooves 18, so that the deformation parts 16 are easier to bend and deform by external force.

Further, one end of the insulating support 12 of the present embodiment is provided with a pin 19 electrically connected to the winding 13, and the pin 19 is soldered with a terminal circuit board 20. The pin piece 19 and the terminal circuit board 20 are arranged to facilitate the user to supply power to the winding 13 and also facilitate the actual electrical connection and use of the user.

Further, one end of the insulating support 12 of this embodiment is provided with a "Y" shaped protection post 21, and one end of the lead 19 is embedded in the protection post 21. The root of the protection column 21 in the shape of Y is thick, the tail end is thin, so that the whole structure of the protection column 21 is firm, when the pin piece 19 is inlaid on the protection column 21, the lower end of the pin piece 19 is firmly fixed in the protection column 21, the fixing firmness of the pin piece 19 is increased, meanwhile, because the voltage and the current on the pins are larger, the distance between the pins is closer, the protection column 21 adopts an insulating material, and therefore, short circuit or electric arc between the pins is effectively prevented.

Further, two ends of the bearing support 4 of the present embodiment are provided with limiting grooves 22 arranged coaxially, and the first bearing 5 and the second bearing 6 are fixedly mounted in the limiting grooves 22 through glue. Therefore, the first bearing 5 and the second bearing 6 can be stably and limitedly installed by the aid of the limiting grooves 22, and meanwhile, if the two limiting grooves 22 are required to have higher concentricity, the bearing support 4 can be installed on a machine tool to carry out more precise machining on the two limiting grooves 22, so that the concentricity precision of the two limiting grooves 22 is further improved.

Further, the bearing bracket 4 and the inner core 7 of the present embodiment are integrally molded by injection molding, and the two limit grooves 22 are molded simultaneously after injection molding by the mold. Therefore, the concentricity of the two limit grooves 22 can be well ensured, the concentricity of the central line formed by the two limit grooves 22 and the inner iron core 7 of one circle is effectively improved, the manufacturing precision of the stator assembly is greatly improved, and the assembly precision of the rotor 2 and the stator assembly 3 is also effectively improved.

Further, a glue filling groove 23 is provided in the limiting groove 22 of the present embodiment. Therefore, when the first bearing 5 and the second bearing 6 are fixedly arranged in the limit groove 22 through glue, some glue can be stored in the glue filling groove 23, so that the firmness of bonding the first bearing 5 and the second bearing 6 is effectively improved.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A high-speed silence fan motor which characterized in that: including shell, rotor, stator module and be hollow form bearing support, stator module, bearing support cover in proper order with the axle center ground establish and be fixed in the shell inside, first bearing and second bearing are installed to the both ends axle center of bearing support, the interval is inlayed in the bearing support has interior iron core, rotor both ends rotationally insert respectively and locate the hole department of first bearing and second bearing, be provided with the wind channel that runs through between stator module's the outer wall and the shell inner wall, the exposed end of rotor just is located the shell fixed mounting and has the impeller relative with wind channel position, wind channel inner wall interval is provided with the wind guide plate along rotor axial direction and the incline direction is the same.

2. The high speed silent fan motor according to claim 1, wherein: the stator assembly comprises at least two winding assemblies which are connected with each other and can be spliced into a round shape, each winding assembly comprises an arc-shaped insulating support, a winding and an outer iron core, the winding is fixedly arranged on the insulating support, the outer iron cores are inlaid in the insulating support, and one ends of the outer iron cores penetrate through inner holes of the winding and are exposed out of the outer surface of the insulating support.

3. A high speed mute fan motor as claimed in claim 2, wherein: and a positioning groove for installing the winding is formed in the insulating support.

4. A high speed mute fan motor as claimed in claim 2, wherein: the inner iron core both ends expose in the inner wall and the surface of bearing bracket, the one end of outer iron core is laminated each other with inner iron core one end.

5. A high speed mute fan motor as claimed in claim 2, wherein: the outer iron core and the inner iron core are all T-shaped, and the narrow ends of the outer iron core and the inner iron core are mutually attached.

6. A high speed mute fan motor as claimed in claim 2, wherein: and a deformation part is connected between the adjacent outer iron cores, and deformation grooves and material reducing grooves are respectively arranged at the upper end and the lower end of the deformation part.

7. A high speed mute fan motor as claimed in claim 2, wherein: one end of the insulating support is provided with a pin piece electrically connected with the winding, and the pin piece is soldered with a terminal circuit board.

8. The high speed mute fan motor of claim 7, wherein: one end of the insulating support is provided with a Y-shaped protection column, and one end of the pin piece is inlaid in the protection column.

9. The high speed silent fan motor according to claim 1, wherein: the two ends of the bearing support are provided with limiting grooves which are coaxially arranged, and the first bearing and the second bearing are fixedly arranged in the limiting grooves through glue.

10. The high speed silent fan motor according to claim 9, wherein: and a glue filling groove is formed in the limiting groove.

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