CN210469008U

CN210469008U - Electric fan with noise reduction function

Info

Publication number: CN210469008U
Application number: CN201921976180.1U
Authority: CN
Inventors: 尹凌飞
Original assignee: Suzhou Runhao Motor Co ltd
Current assignee: Suzhou Runhao Motor Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-05-05
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses an electric fan with function of making an uproar is fallen, including motor housing, ventilation net and visor, be formed with on the motor housing with the first tang portion of ventilation net matched with, the protection is covered and is formed with the second tang portion with ventilation net matched with, and the one end of ventilation net links to each other with motor housing through first tang portion, and the looks remote site passes through the second tang portion and links to each other with the visor, and is formed with a plurality of ventilation holes on the ventilation net. The utility model discloses a set up the ventilation net, can effectively reduce the outside propagation of sound, can also beautify the electric fan outward appearance when reducing the electric fan noise.

Description

Electric fan with noise reduction function

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to an electric fan with function of making an uproar is fallen is related to.

Background

The vacuum cleaner is a cleaning electric appliance which utilizes a motor to drive a blade to rotate at a high speed, generates air negative pressure in a sealed shell and sucks dust and other sundries into a dust collecting bag. The electric blower of the dust collector is a core part of the dust collector and consists of two parts, namely a motor part and a blower part, and the electric blower of the dust collector has high requirement on the rotating speed, so that the conventional electric blower of the dust collector generally uses a brush motor, the rotating speed of the brush motor is usually between 2 and 4 thousands of revolutions, and although the rotating speed of the brush motor can meet the requirement of the electric blower of the dust collector, a commutator of the brush motor is fast in abrasion, short in service life, high in noise and low in performance. Compared with a brush motor, the brushless direct current motor adopts electronic commutation because the brush commutation is cancelled, the rotating speed can reach 6 to 10 thousands of revolutions, the service life reaches more than 2000 hours, and the noise can be effectively reduced.

A conventional brushless dc motor generally includes a motor housing, a motor stator, a motor rotor, and other components. Motor stator and electric motor rotor easily produce big noise at the during operation, and the noise causes the injury to the human body easily, consequently, how to reduce the noise of electric fan during operation is the problem that needs to solve urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide an electric fan with function of making an uproar is fallen.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electric fan with function of making an uproar falls, includes motor housing, ventilation net and visor, be formed with on the motor housing with ventilation net matched with first tang portion, the visor be formed with ventilation net matched with second tang portion, the one end of ventilation net through first tang portion with motor housing links to each other, the looks remote site through the second tang portion with the visor links to each other, just be formed with a plurality of ventilation holes on the ventilation net.

Preferably, the first spigot is an annular groove structure formed by inward recess of the outer circular surface of the motor casing close to the ventilation net.

Preferably, the second stop opening portion is an annular groove structure formed by inwards recessing the outer circular surface of the protective cover close to the ventilation net.

Preferably, the end face of the protective cover is provided with a plurality of heat dissipation holes.

Preferably, the end face of the protective cover is further provided with at least one cable outlet hole.

Preferably, the motor casing is provided with at least three bolt mounting columns arranged along the axial direction of the motor casing, and each bolt mounting column is provided with a bolt hole.

Preferably, the end surface of the bolt mounting column is recessed to form a stop surface for stopping the motor stator.

Preferably, a positioning column for positioning the motor stator is arranged on the stopping surface.

Preferably, each of the bolt mounting posts extends out of the motor housing in an axial direction of the motor housing.

The utility model has the advantages that:

the utility model discloses a set up the ventilation net, effectively reduce sound and outwards propagate, beautify the electric fan outward appearance when reducing the electric fan noise.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a perspective view of a motor housing;

FIG. 3 is a perspective view of the protective cover;

reference numerals: 10. motor casing, 11, first spigot portion, 12, interior casing, 13, shell body, 14, blade, 15, air current passageway, 16, opening, 17, bolt installing post, 171, bolt hole, 172, backstop face, 18, reference column, 20, ventilation net, 21, ventilation hole, 30, visor, 31, second spigot portion, 32, louvre, 33, cable outlet.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

As shown in fig. 1, the electric fan with noise reduction function disclosed in the present invention comprises a motor casing 10, a ventilation net 20 and a protection cover 30, wherein the motor casing 10 is used for mounting a motor stator and a motor rotor, and a first stop portion 11 matched with the ventilation net 20 is formed thereon; the protective cover 30 is used for protecting the circuit protection board, and a second stop part 31 matched with the ventilation net 20 is also formed on the protective cover; the ventilation net 20 is used for reducing sound from spreading outwards and reducing electric fan noise, one end of the ventilation net is connected with the motor casing 10 through the first spigot part 11, and the opposite end of the ventilation net is connected with the protective cover 30 through the second spigot part 31, and the motor stator and the motor rotor are covered inside the ventilation net.

Specifically, as shown in fig. 2, the motor casing 10 includes an inner casing 12, an outer casing 13, and a plurality of blades 14, wherein a bearing chamber 121 is formed on the inner casing 12 for installing and fixing a bearing of a motor rotor, the inner casing 12 is disposed in the outer casing 13, and an airflow passage 15 for an airflow to pass through is formed between the inner casing 12 and the outer casing 13; a plurality of blades 14 are provided in the air flow passage 15 and connect the outer side wall of the inner casing 12 and the inner side wall of the outer casing 13, and the plurality of blades 14 are arranged in the circumferential direction of the inner casing 12, that is, the plurality of blades 14 are provided around the inner casing 12.

Further, an opening 16 communicating with the airflow passage 15 is formed between adjacent two of the blades 14, so that the outside airflow enters the airflow passage 15 through the opening 16. In order to better bring the air flow into the air flow channel 15, the vanes 14 are angled upwards in the axial direction of the outer casing 13.

As shown in fig. 2, the first stop portion 11 is an annular groove structure formed by inward recessing of the outer casing 13 near the outer circumferential surface of the ventilation net 20. Further, still be equipped with on the shell body 13 along the at least three bolt erection column 17 of shell body 13 axial setting, be equipped with the bolt hole 171 on every bolt erection column 17, during the implementation, the motor stator passes through the cooperation of bolt and bolt erection column 17 and installs on motor housing 10 to the quantity of bolt erection column 17 can set up according to actual demand.

Furthermore, a part of the end surface of the bolt mounting post 17 is recessed towards the blade 14 to form a stop surface 172, and the stop surface 172 is used for stopping the motor stator, so that the motor stator can be prevented from rotating on the one hand, and the accuracy of the mounting position of the motor stator can be ensured on the other hand.

In order to accurately mount the motor stator, the stop surface 172 is further provided with a positioning column 18, and the positioning column 18 is matched with a positioning hole (not shown) on the motor stator to realize accurate positioning of the motor stator.

In the present embodiment, each of the bolt mounting posts 17 is preferably provided on an inner side wall of the outer housing 13 and extends out of the outer housing 13 in an axial direction of the outer housing 13. Through locating bolt erection column 17 at the inside wall of shell body 13, the radial dimension of reducible shell body 13 makes the electric fan size do littleer.

In this embodiment, the ventilation net 20 is a cylindrical hollow structure, and a plurality of ventilation holes 21 are formed on the circumferential surface of the ventilation net 20, so that the ventilation net 20 not only can reduce the propagation of sound, but also can make air flow diffuse outwards through the ventilation holes 21, and the air outlet of the electric fan is not affected.

As shown in fig. 3, the end face of the protection cover 30 is provided with a plurality of heat dissipation holes 32 for quickly dissipating heat generated by the circuit board. Furthermore, the end face of the protective cover 30 is further provided with at least one cable outlet hole 33 for connecting the circuit board connection line with an external power supply.

In this embodiment, the second stop portion 31 is an annular groove structure formed by inward recessing of the outer circumferential surface of the protection cover 30 close to the ventilation net 20.

The utility model discloses a set up ventilation net 20, can effectively reduce the outside propagation of sound, can beautify the electric fan outward appearance when reducing the electric fan noise.

The technical contents and features of the present invention have been disclosed as above, however, those skilled in the art can still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention, therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications without departing from the present invention, and should be covered by the claims of the present patent application.

Claims

1. The utility model provides an electric fan with function of making an uproar falls, its characterized in that includes motor housing, ventilation net and visor, motor housing is last be formed with the first tang portion of ventilation net matched with, the visor be covered be formed with ventilation net matched with second tang portion, the one end of ventilation net through first tang portion with motor housing links to each other, the looks remote site through second tang portion with the visor links to each other, just be formed with a plurality of ventilation holes on the ventilation net.

2. The electric fan according to claim 1, wherein the first stop portion is an annular groove structure formed by inward recess of an outer circumferential surface of the motor casing close to the ventilation net.

3. The electric fan according to claim 1, wherein the second stop portion is an annular groove structure formed by inward recess of an outer circumferential surface of the protective cover close to the ventilation net.

4. The electric fan of claim 1, wherein the end surface of the protective cover is provided with a plurality of heat dissipation holes.

5. The electric fan according to claim 1, wherein the end face of the protective cover further comprises at least one cable outlet hole.

6. The electric fan of claim 1, wherein the motor housing has at least three bolt mounting posts disposed along an axial direction of the motor housing, each bolt mounting post having a bolt hole.

7. The electric fan of claim 6, wherein the end surface of the bolt mounting post is recessed to form a stop surface for abutting against a motor stator.

8. The electric fan of claim 7, wherein the stop surface is provided with a positioning post for positioning the motor stator.

9. The electric fan of claim 6, wherein each of the bolt mounting posts extends out of the motor housing in an axial direction of the motor housing.