CN217842076U

CN217842076U - Fan that axial dimension is little

Info

Publication number: CN217842076U
Application number: CN202222101614.1U
Authority: CN
Inventors: 胡春元; 李峰; 王浩
Original assignee: Dongguan Jilaisheng Motor Co ltd
Current assignee: Dongguan Jilaisheng Motor Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-11-18
Anticipated expiration: 2032-08-10

Abstract

The utility model relates to the technical field of fans, in particular to a fan with small axial size, which comprises a motor, a volute component and an impeller, wherein the motor comprises a rotor shell, an output shaft, a stator component and a PCB (printed circuit board), the stator component is arranged in the rotor shell, the output shaft and the rotor shell are coaxially arranged, the volute component comprises an upper volute and a lower volute, an impeller cavity is formed between the upper volute and the lower volute, and the impeller is assembled in the impeller cavity; the method is characterized in that: the motor still includes the installation component, and the installation component is fixed to be set up in lower spiral case, and the PCB board is fixed to be installed in the installation component, and the impeller is located to the output shaft after wearing to establish PCB board, installation component and lower spiral case in proper order, and the output shaft drive impeller rotates. The utility model provides a pair of fan that axial dimensions is little, with the installation component direct mount of motor in spiral case down, the axial dimensions of reduction fan improves the life-span of fan, promotes assembly manufacturing efficiency.

Description

Fan with small axial size

Technical Field

The utility model belongs to the technical field of the fan technique and specifically relates to indicate a fan that axial dimension is little.

Background

Along with the continuous iteration update of the household sweeping robot, the requirements on the practicability, cleanliness and volume miniaturization of the household sweeping robot are higher and higher, and the requirements on the volume, efficiency, service life performance and the like of a core part dust collection fan of the sweeping robot are also higher and higher. In the dust collection fan in the prior art, the impeller assembly of the fan is far away from the supporting base of the motor, the assembly steps between the volute of the fan and the motor are multiple, the assembly production efficiency of the fan is low, the axial size of the fan is large, the negative pressure of a bearing in the fan is large, the service life of the bearing is short, and the service life of a product is short.

Disclosure of Invention

The utility model discloses problem to prior art provides a fan that axial dimensions is little, with the installation component direct mount of motor in spiral case down, reduces the axial dimensions of fan, improves the life-span of fan, promotes assembly manufacturing efficiency.

In order to solve the technical problem, the utility model adopts the following technical scheme: a fan with small axial size comprises a motor, a volute component and an impeller, wherein the motor comprises a rotor shell, an output shaft, a stator component and a PCB (printed circuit board), the stator component is arranged in the rotor shell, the output shaft and the rotor shell are coaxially arranged, the volute component comprises an upper volute and a lower volute, an impeller cavity is formed between the upper volute and the lower volute, and the impeller is assembled in the impeller cavity; the motor further comprises a mounting assembly, the mounting assembly is fixedly arranged on the lower volute, the PCB is fixedly arranged on the mounting assembly, the output shaft sequentially penetrates through the PCB, the mounting assembly and the lower volute and then is arranged on the impeller, and the output shaft drives the impeller to rotate.

Preferably, the mounting assembly includes a mounting base plate and a bushing, the bushing is fixedly mounted on the mounting base plate, the bushing is rotatably sleeved on the periphery of the output shaft, the stator assembly is mounted on the periphery of the bushing, the PCB is mounted on the mounting base plate, and the mounting base plate is fixedly mounted on the lower volute.

Preferably, the installation component still includes a plurality of retaining members, the protruding a plurality of reference columns that are equipped with of mounting plate, the installation through-hole has been seted up to the reference column, the inner wall of installation through-hole is provided with first screw thread, down the spiral case seted up a plurality of and installation through-hole complex connecting holes, the retaining member wear to establish behind the connecting hole and the first screw thread spiro union of the installation through-hole that corresponds.

Preferably, the PCB board is provided with a plurality of positioning holes, and the positioning columns are assembled in the positioning holes.

Preferably, the mounting base plate and the lower volute are integrally connected.

Preferably, the mounting assembly includes a bushing, the bushing is integrally connected with the lower volute, the bushing is rotatably sleeved on the periphery of the output shaft, the stator assembly is mounted on the periphery of the bushing, and the PCB is fixed to the bushing.

Preferably, an insulating gasket is arranged between the PCB and the mounting bottom plate.

Preferably, the periphery of the output shaft is rotatably sleeved with a first bearing and a second bearing, the bushing is provided with a first shaft cavity and a second shaft cavity, the bottom of the first shaft cavity is provided with a first limiting table, and the top of the second shaft cavity is provided with a second limiting table; the first bearing is assembled in the first shaft cavity and abutted against the first limiting table, the output shaft is provided with a retaining ring, the second bearing is assembled in the second shaft cavity, and the bottom of the second bearing is abutted against the retaining ring.

Preferably, a wave washer is arranged between the second bearing and the second limit table.

Preferably, the rotor shell is sleeved with a dynamic balance ring.

The utility model has the advantages that:

the utility model provides a fan that axial dimension is little, fix the installation component of motor in the spiral case down, shorten the distance between impeller and the output shaft of motor, reduce the axial dimension of fan, reduced the degree of disturbance of motor, reduce the load of the bearing of motor output shaft, improve the life-span of the bearing of output shaft, and then improved the life-span of fan; and the motor and the volute component can be produced and assembled respectively, and then the mounting component is fixed to the lower volute, so that the mounting mode is simple, the motor and the volute component can be assembled synchronously, and the assembling and manufacturing efficiency of the fan is effectively improved.

Drawings

Fig. 1 is an exploded schematic view of a first embodiment of the present invention;

FIG. 2 is a schematic view of the present invention;

fig. 3 is a first cross-sectional view of a first embodiment of the present invention;

FIG. 4 is a second cross-sectional view of a first embodiment of the present invention;

fig. 5 is a schematic structural view of a mounting base plate according to a first embodiment of the present invention;

fig. 6 is a sectional view of the bushing, the first bearing and the second bearing of the present invention after being assembled;

fig. 7 is a cross-sectional view of a bushing of the present invention;

fig. 8 is a schematic structural diagram of the bushing and the lower volute according to the third embodiment of the present invention.

The reference numerals in fig. 1 to 8 include:

1-impeller, 2-rotor shell, 3-output shaft, 5-PCB (printed circuit board), 6-lower volute, 7-mounting bottom plate, 8-lining, 9-locking piece, 10-positioning column, 11-mounting through hole, 12-connecting hole, 13-positioning hole, 14-insulating gasket, 15-first bearing, 16-second bearing, 17-first shaft cavity, 18-second shaft cavity, 19-first limiting table, 20-second limiting table, 21-retaining ring, 22-wave washer and 23-dynamic balance ring.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

The first embodiment is as follows:

the blower with a small axial dimension provided in this embodiment, as shown in fig. 1 to 4, includes a motor, a volute component, and an impeller 1, where the motor includes a rotor housing 2, an output shaft 3, a stator component (not shown in the drawings), and a PCB 5, the stator component is installed in the rotor housing 2, the output shaft 3 is coaxially disposed with the rotor housing 2, the volute component includes an upper volute (not shown in the drawings) and a lower volute 6, an impeller 1 cavity is formed between the upper volute and the lower volute 6, and the impeller 1 is assembled in the impeller 1 cavity; the motor further comprises a mounting assembly, the mounting assembly is fixedly arranged on the lower volute 6, the PCB 5 is fixedly arranged on the mounting assembly, the output shaft 3 sequentially penetrates through the PCB 5, the mounting assembly and the lower volute 6 and then is arranged on the impeller 1, and the output shaft 3 drives the impeller 1 to rotate. The rotor housing 2, the stator assembly, the output shaft 3, the PCB board 5, the magnetic ring used in cooperation with the output shaft 5, and the bearing used in cooperation with the output shaft 3 of the motor of this embodiment are all the prior art, and the description of the motor function is omitted here.

Specifically, as shown in fig. 3 and 4, during production and assembly, the motor is assembled in advance, the mounting assembly of the motor is fixed to the lower volute 6, the output shaft 3 penetrates through the lower volute 6 to be connected with the impeller 1, the upper volute and the lower volute 6 are assembled, the mounting assembly of the motor is fixed to the lower volute 6, and the distance between the impeller 1 and the output shaft 3 of the motor is shortened, so that the axial size of the fan is reduced, the disturbance degree of the motor is reduced, the loads of the first bearing 15 and the second bearing 16 sleeved on the periphery of the output shaft 3 of the motor are reduced, the service lives of the first bearing 15 and the second bearing 16 are prolonged, and the service life of the fan is prolonged; and the motor and the volute component can be respectively produced and assembled, and then the mounting component is fixed to the lower volute 6, so that the mounting mode is simple, the motor and the volute component can be synchronously assembled, and the assembling and manufacturing efficiency of the fan is effectively improved.

In this embodiment, as shown in fig. 4 and 5, the mounting assembly includes a mounting plate 7 and a bushing 8, the bushing 8 is fixedly mounted on the mounting plate 7, the bushing 8 is rotatably sleeved on the periphery of the output shaft 3, the stator assembly is mounted on the periphery of the bushing 8, the PCB 5 is mounted on the mounting plate 7, and the mounting plate 7 is fixedly mounted on the lower volute 6.

Specifically, the assembly structure of the bushing 8 is as shown in fig. 4, fig. 6 and fig. 7, the bushing 8 is assembled in the rotor housing 2, and the bushing is sleeved on the periphery of the output shaft 3, a first bearing 15 and a second bearing 16 are assembled between the bushing 8 and the output shaft 3, during operation, the bushing 8 does not rotate, the rotor housing 2 drives the output shaft 3 to rotate, and the output shaft 3 drives the impeller 1 to rotate again, in this embodiment, the mounting bottom plate 7 is fixed on the lower volute 6, the mounting assembly is further provided with a plurality of locking members 9, the mounting bottom plate 7 is convexly provided with a plurality of positioning columns 10, the positioning columns 10 are provided with mounting through holes 11, the inner wall of the mounting through holes 11 is provided with first threads, the lower volute 6 is provided with a plurality of connecting holes 12 matched with the mounting through holes 11, the locking members 9 are assembled with the first threads of the corresponding mounting through holes 11 in a threaded manner after penetrating through the connecting holes 12, that is the motor is assembled during production, during assembly, the mounting bottom plate 7 of the motor is assembled to the position corresponding to the lower volute 6, and the mounting bottom plate 7 are locked by the locking members 9, so that the assembly work of the motor and the volute assembly can be completed, the assembly work of the assembly of the volute and the volute assembly of the assembly can be conveniently and the assembly of the motor and the assembly of the volute assembly, and the assembly of the present embodiment, and the present embodiment can be effectively improved, and the present embodiment, and the manufacturing efficiency can be improved.

The PCB 5 is provided with a plurality of positioning holes 13, the positioning columns 10 are assembled in the positioning holes 13, the positioning columns 10 are inserted into the positioning holes 13 of the PCB 5 during assembly, assembly of the installation bottom plate 7 and the PCB 5 is facilitated, and then the installation bottom plate 7 is fixed to the lower volute 6 to complete assembly.

Further, as shown in fig. 1, an insulating gasket 14 is disposed between the PCB board 5 and the mounting base plate 7.

According to the fan with a small axial size, as shown in fig. 1, 4, 6 and 7, a first bearing 15 and a second bearing 16 are rotatably sleeved on the periphery of an output shaft 3, a first shaft cavity 17 and a second shaft cavity 18 are formed in a bushing 8, a first limiting table 19 is arranged at the bottom of the first shaft cavity 17, and a second limiting table 20 is arranged at the top of the second shaft cavity 18; the first bearing 15 is assembled in the first shaft cavity 17 and abutted against the first limit table 19, the output shaft 3 is provided with a retaining ring 21, the second bearing 16 is assembled in the second shaft cavity 18, the bottom of the second bearing 16 is abutted against the retaining ring 21, and further, a wave washer 22 is arranged between the second bearing 16 and the second limit table 20. Specifically, the first limiting table 19, the second limiting table 20, the retainer ring 21 and the wave washer 22 are all arranged to enable the first bearing 15 and the second bearing 16 to be assembled more stably, and to ensure that the output shaft 3 can rotate stably.

In the blower provided by this embodiment and having a small axial size, as shown in fig. 1 and fig. 2, the rotor housing 2 is sleeved with a dynamic balance ring 23. Specifically, the dynamic balance ring 23 is arranged, so that the rotor shell 2 can keep balance in the process of high-speed rotation, and the noise of the motor operation can be reduced.

Example two:

the difference between the first embodiment and the second embodiment is that the mounting bottom pole and the bushing 8 can be plastic-molded on the lower volute 6 through an injection molding process based on a forming process of the lower volute 6, and only the output shaft 3 needs to be inserted into the bushing 8 and the impeller 1 during assembly, so that the assembly process of the first embodiment can be further simplified, and the assembly efficiency can be improved.

Example three:

the difference between the first embodiment and the second embodiment is that the mounting assembly of the present embodiment only has the bushing 8, and the bushing 8 and the lower volute 6 are integrally connected, as shown in fig. 8, so that during assembly, only the output shaft 3 is inserted into the bushing 8 and assembled and fixed with the impeller 1, and the PCB 5 is fixedly sleeved on the periphery of the bushing 8, which can also simplify the assembly process of the present embodiment and improve the production and assembly efficiency.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A fan with small axial size comprises a motor, a volute component and an impeller, wherein the motor comprises a rotor shell, an output shaft, a stator component and a PCB (printed circuit board), the stator component is arranged in the rotor shell, the output shaft and the rotor shell are coaxially arranged, the volute component comprises an upper volute and a lower volute, an impeller cavity is formed between the upper volute and the lower volute, and the impeller is assembled in the impeller cavity; the method is characterized in that: the motor further comprises a mounting assembly, the mounting assembly is fixedly arranged on the lower volute, the PCB is fixedly arranged on the mounting assembly, the output shaft sequentially penetrates through the PCB, the mounting assembly and the lower volute and then is arranged on the impeller, and the output shaft drives the impeller to rotate.

2. The fan of claim 1, further comprising: the mounting assembly comprises a mounting base plate and a bushing, the bushing is fixedly mounted on the mounting base plate, the bushing is rotatably sleeved on the periphery of the output shaft, the stator assembly is mounted on the periphery of the bushing, the PCB is mounted on the mounting base plate, and the mounting base plate is fixedly mounted on the lower volute.

3. The fan of claim 2, further comprising: the installation component still includes a plurality of retaining members, the protruding a plurality of reference columns that are equipped with of mounting plate, the installation through-hole has been seted up to the reference column, the inner wall of installation through-hole is provided with first screw thread, down the spiral case seted up a plurality of and installation through-hole complex connecting holes, the retaining member wear to establish behind the connecting hole with the first screw thread spiro union of the installation through-hole that corresponds.

4. The fan with a small axial dimension as set forth in claim 3, wherein: the PCB is provided with a plurality of positioning holes, and the positioning columns are assembled in the positioning holes.

5. The fan of claim 2, further comprising: the mounting bottom plate and the lower volute are integrally connected.

6. The fan of claim 1, further comprising: the installation component comprises a lining, the lining and the lower volute are integrally connected, the lining is rotatably sleeved on the periphery of the output shaft, the stator component is installed on the periphery of the lining, and the PCB is fixed on the lining.

7. The fan with a small axial dimension as set forth in claim 2, wherein: an insulating gasket is arranged between the PCB and the mounting bottom plate.

8. The fan of claim 2, further comprising: a first bearing and a second bearing are rotatably sleeved on the periphery of the output shaft, a first shaft cavity and a second shaft cavity are formed in the bushing, a first limiting table is arranged at the bottom of the first shaft cavity, and a second limiting table is arranged at the top of the second shaft cavity; the first bearing is assembled in the first shaft cavity and abutted to the first limiting table, the output shaft is provided with a retaining ring, the second bearing is assembled in the second shaft cavity, and the bottom of the second bearing is abutted to the retaining ring.

9. The fan with a small axial dimension as set forth in claim 8, wherein: and a wave washer is arranged between the second bearing and the second limit table.

10. The fan with a small axial dimension as set forth in claim 1, wherein: and the rotor shell is sleeved with a dynamic balance ring.