CN112220397A - Motor assembly for dust collector and dust collector - Google Patents

Abstract

The invention discloses a motor assembly for a dust collector and the dust collector. The motor assembly for the dust collector comprises a first cover body and a second cover body, wherein a motor is arranged in the first cover body; the second cover body is connected with the first cover body and is communicated with the first cover body, and the second cover body is provided with an air outlet; and the silencing structure is arranged in the second cover body and is positioned between the first cover body and the air outlet. According to the motor assembly for the dust collector and the dust collector, the noise of the whole machine is low, the sound quality is high, the structure is simple, the cost is low, and the assembly is convenient.

Description

Motor assembly for dust collector and dust collector

Technical Field

The invention relates to the technical field of cleaning electric appliances, in particular to a motor assembly for a dust collector and the dust collector.

Background

The noise of the dust collector is always a problem which is difficult to solve in the industry and is one of the pain points which are very concerned by consumers. In the dust collector, air containing dirt passes through the inside of the dust collector, is subjected to dust-air separation in a dust cup and then is discharged out of the dust collector through an air outlet. The main sources of noise in a vacuum cleaner are classified into two types, one is noise generated due to vibration of a motor, and the other is flow noise due to a rapid air flow generated when air is rapidly sucked and discharged.

In a conventional noise reduction solution, on the one hand, a multilayer motor cover is used for sound insulation. On the other hand, the tortuous wind channel increases the tortuous and reflection of sound wave and uses sound absorbing material to absorb sound wave etc., though certain noise reduction effect has been played, but manufacturing cost is high, the process is complicated, and attract material etc. to belong to hindering nature sound absorption principle, possess certain sound absorption effect to the high frequency channel noise, but to the low frequency channel noise, noise reduction effect is not obvious, and because the air current is blocked in motor dust catcher inner space, outside dispersion and the smooth and easy discharge dust catcher that can not be quick, make unfavorable factors such as fuselage temperature increase easily, thereby influence the life of dust catcher.

Disclosure of Invention

In view of the drawbacks and disadvantages of the prior art, an object of the present invention is to provide a motor assembly for a vacuum cleaner, which has a first cover including a motor therein, a second cover, and a noise reduction structure; the second cover body is connected with the first cover body and communicated with the first cover body, the second cover body is provided with an air outlet, and the silencing structure is arranged in the second cover body and positioned between the first cover body and the air outlet.

According to the motor assembly for the dust collector, the silencing structure is additionally arranged at the air outlet of the second cover body, so that airflow is prevented from being refracted and reflected for many times in the cover body, multiple impacts and friction on internal elements of the dust collector are caused, noise is reduced, the service life of the dust collector is prolonged, the production cost is low, the structure is simple, and the assembly is convenient.

In addition, the motor assembly for a vacuum cleaner according to the above embodiment of the present invention may further have the following additional technical features:

in some embodiments, the sound attenuating structure comprises: a first enclosing plate and a second enclosing plate,

a plurality of silencing holes are distributed on the first enclosing plate at intervals; the first enclosing plate and the second enclosing plate are arranged in an inner-outer nested mode, and a closed silencing cavity is formed between the first enclosing plate and the second enclosing plate.

In some embodiments, the second shroud surrounds an outer side of the first shroud.

In some embodiments, the plurality of muffling holes on the first enclosing plate have a perforation rate p ═ pi/4 (d/B) × 100%, where d is the aperture of the muffling hole and B is the distance between two adjacent muffling holes.

In some embodiments, at least two partition plates are arranged in the silencing cavity at intervals along the circumferential direction of the silencing cavity, the at least two partition plates distribute the silencing cavity into a plurality of cavities which are separated from each other, and each cavity is communicated with the outer space of the silencing cavity through the silencing hole.

In some embodiments, the sound-deadening structure further includes a first plate portion and a second plate portion, both of which are connected to the first enclosing plate and the second enclosing plate, and the sound-deadening chamber is formed between the first plate portion, the second plate portion, the first enclosing plate, and the second enclosing plate, wherein an outer edge of the second plate portion is connected to one end of the second enclosing plate, an inner edge of the second plate portion is provided with a first notch groove, and one end of the first enclosing plate is embedded into the first notch groove;

the inner side plate of the first plate part is provided with a second gap groove, and the other end of the first side plate is embedded into the second gap groove;

the outer edge of the first plate part is provided with a flange, and the other end of the second enclosing plate is embedded in the inner side of the flange.

In some embodiments, the first housing has at least one vent hole therein, and the motor is adapted to drive airflow from within the first housing through the vent hole into the second housing.

In some embodiments, the sound attenuating structure is annular in shape, the sound attenuating structure surrounding the vent in a top-down projection.

In some embodiments, a downward extending flange portion is provided on the bottom surface of the first cover, a third notch groove is provided on the upper edge of the inner circumferential surface of the sound-deadening structure, and the flange portion is embedded in the third notch groove.

In some embodiments, the inner side wall or the outer side wall of the silencing structure is provided with a silencing hole for communicating the inner space and the outer space of the silencing structure.

In some embodiments, the motor extends in an up-down direction, and the ventilation holes are spaced apart in a direction around a motor shaft of the motor.

In some embodiments, a gap is provided between the sound attenuating structure and the inner bottom surface of the second housing.

In some embodiments, a first buffer member is connected to the upper end of the motor and the upper end of the first cover, and a second buffer member is also connected to the lower end of the motor and the lower end of the first cover.

In some embodiments, an opening is formed in the top surface of the first cover, a first positioning convex portion extending downward is formed on the inner edge of the opening, and the first positioning convex portion is embedded into the first buffer member.

In some embodiments, the second buffer member is disposed on the inner bottom surface of the first cover and supported at a middle position of the lower end of the motor, a second positioning protrusion extending upward is disposed on an inner wall surface of the first cover, the second positioning protrusion is arranged along the circumferential direction of the first cover, and the lower end of the second buffer member is embedded inside the second positioning protrusion.

In some embodiments, the air outlet is disposed on both left and right sides of the second housing, and a filter member is disposed in the second housing and disposed at the air outlet, the filter member being adapted to filter the airflow flowing out of the air outlet.

In some embodiments, a sealing ring is disposed between the first cover body and the second cover body, an end periphery of the first cover body is provided with an outwardly extending flange, the sealing ring has a covering portion covering the flange, and the sealing ring has a lug extending along a circumferential direction of the sealing ring, and the lug abuts against an upper surface of the filter element.

In some embodiments, the filter element comprises a filter screen, a first cover plate that covers a top portion of the filter screen, and a second cover plate that covers a bottom portion of the filter screen, wherein the lug abuts the first cover plate.

Another object of the present invention is to provide a vacuum cleaner.

A vacuum cleaner according to an embodiment of the present invention includes: the dust cup is provided with a dust air inlet and a dust air outlet, the inlet of the motor assembly is communicated with the dust air inlet, and the motor assembly is the motor assembly for the dust collector.

The dust collector provided by the embodiment of the invention has the advantages of high sound quality, low noise and low production cost.

Drawings

Fig. 1 is a sectional view in the up-down direction of an embodiment of an object of the present invention.

Fig. 2 is a partial view of the structure of the cancellation tone of fig. 1.

Fig. 3 is a schematic view of the silencing structure of fig. 1 in one direction.

Fig. 4 is a side view of the silencing structure of fig. 1.

Fig. 5 is an enlarged view of region a in fig. 1.

Fig. 6 is an enlarged view of region B in fig. 1.

Fig. 7 is an enlarged view of region C in fig. 1.

Reference numerals:

a motor assembly 10 for a vacuum cleaner is provided,

first cover body 1, second cover body 2, sound-absorbing structure 3, first bounding wall 31, second bounding wall 32, sound-absorbing hole 33, amortization chamber 34, baffle 35, first board 36, second board 37, first breach groove 371, second breach groove 361, ventilation hole 11, turn-ups portion 12, third breach groove 38, first bolster 4, second bolster 5, opening 6, first location convex part 7, second location convex part 8, filter 21, sealing washer 9, flange 13, motor 14, cladding portion 91, lug 92, filter screen 211, first apron 212, second apron 213, air outlet 22.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring now to fig. 1 to 7, a motor assembly 10 for a cleaner according to an embodiment of the present invention will be described,

referring to fig. 1, a motor assembly 10 for a vacuum cleaner according to an embodiment of the present invention includes a first housing 1, a second housing 2, and a noise reduction structure 3.

The first cover body 1 comprises a motor 14 therein, the motor 14 is used for driving a wind wheel to rotate, so that air with dust is sucked into an inlet of a dust cup of the dust collector, the dust is left in the dust cup after dust and air are separated in the dust cup of the dust collector, and then the wind wheel drives airflow to flow out of the dust collector.

The second cover 2 is connected to the first cover 1, and the second cover 2 has an air outlet 22, in other words, the first cover 1 and the second cover 2 are connected up and down, the first cover 1 is located above the second cover 2, and the bottom surface of the first cover 1 has structural forms such as an opening or a through hole, so that the internal spaces of the first cover 1 and the second cover 2 are connected, and the air flow flows into the second cover 2 from the first cover 1 and then is discharged from the air outlet 22 of the second cover 2.

The silencing structure 3 is arranged in the second cover body 2 and between the first cover body 1 and the air outlet 22, namely, the silencing structure is arranged at the downstream of the air duct flow path.

The sound-deadening structure 3 may be in various forms, for example, a thin-plate or thin-film resonance sound-absorbing structure, a perforated-plate or microporous-plate sound-absorbing structure, or a shark fin sound-deadening flow-guiding structure at the air outlet, or a sound-deadening louver structure, which is not listed here.

Preferably, with reference to fig. 1 to 4, the silencing structure 3 comprises: the silencer comprises a first enclosing plate 31 and a second enclosing plate 32, wherein a plurality of silencing holes 33 are distributed on the first enclosing plate 31 at intervals, the first enclosing plate 31 and the second enclosing plate 32 are nested inside and outside, and a closed silencing cavity 34 is formed between the first enclosing plate 31 and the second enclosing plate 32.

It can be seen that what adopted in the above-mentioned embodiment is the amortization structure of microperforated panel, and microperforated panel's amortization structure comprises the air bed behind the sheet metal and the board that have certain perforation rate and aperture and are less than 1mm, and it is because the board is thin, and the aperture is little, and the acoustic resistance is big, light in weight to simple structure, processing is convenient, and the application scene is wide, and more importantly, its sound absorption coefficient is high, and the frequency bandwidth of sound absorption is big.

Referring to fig. 2 to 4, the second enclosing plate 32 surrounds the outside of the first enclosing plate 31. In this embodiment the first enclosure 31 has the muffling holes 33 therein and the second enclosure 32 surrounds the outside of the first enclosure 31 as a back plate, but alternatively in other embodiments the positions of the second enclosure 32 and the first enclosure 31 may be interchanged, i.e. the second enclosure 32 has the muffling holes 33 therein and the first enclosure has no muffling holes therein as a back plate surrounded by the second enclosure 32. The two modes can achieve the purposes of noise elimination and noise reduction.

Referring to fig. 2 to 4, the first shroud 31 has a plurality of muffling holes 33, and the calculation formula of the perforation rate is

Where d denotes the aperture of the muffling hole, and B denotes the distance between two adjacent muffling holes. And, according to the Helmholtz resonance cavity principle, the resonance frequency of the sound absorption structure of the single-layer micro-perforated plate

Wherein c represents the sound velocity, d represents the aperture of the muffling hole, h represents the cavity depth, and t represents the thickness of the orifice plate.

For the single-layer micro-perforated plate type sound absorption structure, the sound absorption structure is a resonance sound absorption structure. When the sound wave of the air flow is in a low frequency band, the sound eliminating quantity can be obtained by a calculation formula of the resonance silencer, and when the frequency of the sound wave of the air flow is at a resonance frequency f₀That is, by adjusting the thickness of the first shroud 31 and the depth of the sound-deadening chamber 34, the flow of the gas can be made to have the resonance frequency f₀Nearby sound waves are eliminated, and more specifically, noise in a specific frequency band at the resonant frequency f of the sound absorbing structure of the single-layer micro-perforated plate is eliminated₀Is central and this particular frequency band can be adjusted by the thickness of the plate of the first shroud 31 and the depth of the sound-deadening chamber 34.

In short, by selecting different perforation rates and plate thicknesses of the first enclosing plate 31 and different cavity depths of the sound-deadening cavities 34, the frequency spectrum performance of the sound-deadening structure 3 can be controlled to obtain a good sound-deadening effect in a desired frequency range.

Optionally, referring to fig. 3, at least two partition plates 35 are disposed in the sound-deadening chamber 34 and arranged at intervals along the circumferential direction of the sound-deadening chamber 34, the at least two partition plates 35 distribute the sound-deadening chamber 34 into a plurality of cavities separated from each other, and each cavity is communicated with the external space of the sound-deadening chamber 34 through the sound-deadening hole 33.

The sound-absorbing cavity 34 is divided into a plurality of cavities, the inherent vibration frequency of the sound-absorbing cavity can be changed, so that the sound cavity mode of the sound-absorbing cavity 34 is changed, the sound absorption of the noise in a specific frequency band can be selectively realized, the selection of the noise in the specific frequency band with the resonance frequency as the center frequency is realized by controlling the shape of the cavity, the sound-absorbing effect is good, and the application range is expanded to a certain extent.

The silencing structure 3 further comprises a first plate part 36 and a second plate part 37, wherein the first plate part 36 and the second plate part 37 are connected with the first enclosing plate 31 and the second enclosing plate 32, and a silencing cavity 34 is formed among the first plate part 36, the second plate part 37, the first enclosing plate 31 and the second enclosing plate 32, wherein the silencing structure 3 can be integrally formed in a stamping mode or assembled into an integral structure in a clamping mode, and the completeness of the cavity of the silencing cavity 34 can be met.

In order to make the structure more stable and form a complete cavity, with reference to fig. 2, 5 and 6, the outer edge of the second plate portion 37 is connected to one end of the second enclosing plate 32, the inner edge of the second plate portion 37 is provided with a first notch groove 371, and one end of the first enclosing plate 31 is embedded into the first notch groove 371. The inner side plate of the first plate portion 35 is provided with a second cut-out groove 361, and the other end of the first plate portion 31 is fitted into the second cut-out groove 361. The outer edge of the first plate portion 35 is provided with a flange, and the other end of the second enclosing plate 32 is embedded inside the flange.

Referring to fig. 1, the first housing 1 has at least one ventilation hole 11, and specifically, referring to fig. 1, the bottom wall of the first housing 1 has at least one ventilation hole 11, and the motor 14 is adapted to drive the airflow from the inside of the first housing 1 to the inside of the second housing 2 through the ventilation hole 11. The vent hole 11 may be provided as one vent hole having a large aperture, or may be provided as a plurality of vent holes.

Alternatively, a plurality of ventilation holes 11 are formed in the bottom wall of the first cover 1, extending around the motor shaft, and form a circular ring-shaped area, and the circular ring-shaped area has an inner diameter of a distance from the center line of the motor shaft to the outer edge of the second positioning protrusion 8 in the horizontal direction and an outer diameter of a distance from the center line of the motor shaft to the first shroud 31 in the horizontal direction.

The structural design of a plurality of ventilation holes 8 has both guaranteed that the air current has once been fallen the noise of making an uproar from the first cover body 1 to the second cover body 2, because the ventilation hole is on the diapire of the first cover body 1, simultaneously on the roof of the second cover body, form the cavity in the second cover body 32, accord with perforated plate noise-damping structure's structure basically, that is to say, because the aperture in ventilation hole 8 is little, the acoustic resistance is big, the cavity sound absorption in the second cover body 2 in addition, thereby improve the sound absorption coefficient to the noise.

Preferably, the sound-attenuating structure 3 is ring-shaped, the sound-attenuating structure 3 surrounding the ventilation holes 11 in a projection from above downwards.

Alternatively, the sound-deadening structure 3 may have a square shape or other shape as long as it can surround the vent hole 11 to effectively absorb the sound of the air flow passing through the vent hole 11.

Referring to fig. 1 and 5, a downward extending flange is provided on the bottom surface of the first cover 1, a third notch groove 38 is provided on the upper edge of the inner circumferential surface of the noise reduction structure 3, and the flange is embedded in the third notch groove 38. The flanged portion extends into the third notch groove 38, so that the bottom wall of the first cover 1 is attached to the first plate portion 35 of the sound-deadening structure 3.

In other words, the sound attenuation structure 3 is fixed at the upper part in the second cover body 2, a gap is formed between the sound attenuation structure 3 and the bottom wall of the second cover body 2, so that after the air flow comes out from the vent hole 11, a part of the air flow enters the sound attenuation structure 3 to be absorbed, and the other part of the air flow flows through the sound attenuation structure 3 and the gap between the sound attenuation structure 3 and the bottom wall of the second cover body 2 and respectively flows to the left air outlet and the right air outlet 2, thereby prolonging the path through which the air flow passes.

Optionally, the inner side wall or the outer side wall of the silencing structure 3 is provided with a silencing hole 33 communicating the inner space and the outer space of the silencing structure 3. In other words, the sound-absorbing structure 3 of the embodiment of the present invention is preferably a single-layer micro-perforated plate, and one of the first enclosing plate 31 and the second enclosing plate 32 serves as a perforated plate, and the other serves as a back plate, so as to achieve the purpose of sound absorption and noise reduction.

Referring to fig. 1, the motor 14 extends in the up-down direction, and the ventilation holes 11 are spaced in the direction around the motor shaft of the motor 14. The vent holes 11 are distributed on a circular ring belt which takes a projection point of a motor axis of the motor 14 on the bottom wall of the first cover body 1 from top to bottom as a circle center.

Alternatively, the ventilation holes 11 may have a different distribution, such as a square distribution.

Referring to fig. 1, a gap is formed between the sound-deadening structure 3 and the inner bottom surface of the second cover 2. A gap is reserved between the silencing structure 3 and the bottom, so that air flow can conveniently pass through the gap and reach the air outlet 22, the air flow channel is prolonged to a certain extent, and noise reduction is facilitated.

Referring to fig. 1, a first buffer member 4 is connected to the upper end of the motor 14 and the upper end of the first cover 1, and a second buffer member 5 is also connected to the lower end of the motor 14 and the lower end of the first cover 1. In order to ensure the dust collection effect, a relatively high-power motor is generally used for the dust collector, meanwhile, the power of the motor is high, in general, the reversing frequency of an internal brush, the rotating frequency of a rotor and the like are relatively high, and the vibration frequency of the motor is relatively high, so that noise is generated.

Referring to fig. 1, an opening 6 is disposed on the top surface of the first cover 2, a first positioning protrusion 7 extending downward is disposed on the inner edge of the opening 6, and the first positioning protrusion 7 is embedded in the first buffer 4. The first positioning protrusion 7 is used for positioning the motor 14 up and down and left and right.

Referring to fig. 1, the second buffer 5 is disposed on the inner bottom surface of the first cover 1 and supported at the middle position of the lower end of the motor 14, the inner wall surface of the first cover 1 is provided with a second positioning protrusion 8 extending upward, the second positioning protrusions 8 are arranged along the circumferential direction of the first cover 2, and the lower end of the second buffer 5 is embedded inside the second positioning protrusion 8.

In order to prevent the vibration of the motor 14 from being transmitted to the first cover 1, the lower end of the motor 14 and the bottom wall of the first cover 1 are connected with a second buffer 5, the second buffer 5 is limited on the bottom wall of the first cover 1 by a second positioning convex part 8, and the upper limit and the lower limit of the second buffer 5 are limited by the gravity of the motor 14 due to the connection of the second buffer to the lower end of the motor 14.

Referring to fig. 1, air outlets 22 are disposed on both sides of the second cover 2, a filtering member 21 is disposed in the second cover 2, the filtering member 21 is disposed at the air outlet 22, and the filtering member 21 is adapted to filter the air flow flowing out from the air outlet 22.

In order to improve user experience and prevent the air outlet flow in the air outlet 22 from carrying more dust, in addition to performing primary separation and filtration on the dust carried in the air flow in a dust cup (not shown in the figure) of the dust collector, a filter element 21 is particularly arranged at the air outlet 22, and in some embodiments, the filter element 21 is preferably a hepa net, namely a high-efficiency particulate filter, which is effective and safe and can remove particle pollutants in the air flow, and meanwhile, because the wind resistance of the hepa net is higher, the wind-driven noise can be reduced to a certain extent.

Of course, the invention is not limited to a filter element such as a hessian mesh, but may be embodied in other forms.

Referring to fig. 1 and 7, a sealing ring 9 is arranged between the first cover body 1 and the second cover body 2, an outwardly extending flange 13 is arranged at the end periphery of the first cover body 1, the sealing ring 9 is provided with a covering part 91 covering the flange 9, the sealing ring 9 is provided with a lug 92 extending along the periphery of the sealing ring 9, and the lug 92 abuts against the upper surface of the filter member 21.

Through the setting of sealing washer 9, make first cover body 1 and second cover body 2 airtight continuous, prevent that the air current from revealing to a certain extent, reduced the pneumatic noise of air current. Meanwhile, the lug 92 abuts against the upper surface of the filter member 21, so that the upper and lower positioning of the lug is realized on one hand, and the vibration of the first cover body 1 is buffered on the other hand, so that the whole noise of the dust collector is reduced.

Referring to fig. 1 and 7, the filter member 21 includes: a filter screen 211, a first cover plate 212, and a second cover plate 213. A first cover plate 212 covers the top of the filter screen 211 and a second cover plate 213 covers the bottom of the filter screen 211, the lugs 92 abutting the first cover plate 212.

The first cover plate 212 and the second cover plate 213 can fix the filter screen 211 well, so that the filter screen covers the air outlet 22 without deviation, thereby playing a role in filtering and purifying.

Another object of the present invention is to provide a vacuum cleaner, comprising: a dirt cup (not shown) having a dirt air inlet (not shown) and a dirt air outlet (not shown), and a motor assembly having an inlet communicating with the dirt air inlet, the motor assembly being a motor assembly 10 for a vacuum cleaner as described above, whereby the vacuum cleaner of the present invention provides all of the advantages as described above.

In a word, the silencing structure 3 in the embodiment of the invention is mainly a micro-perforated plate silencer, the micro-perforated plate silencer is a sound absorption element with high sound resistance and low sound quality, the sound resistance is inversely proportional to the aperture of a perforated plate, the aperture of the micro-perforated plate is small, the sound resistance is very large, and the sound absorption coefficient of the structure is improved. The low perforation rate reduces the sound quality, widens the sound absorption frequency bandwidth depending on the ratio of the sound resistance to the sound quality, and simultaneously, the cavity behind the micro-perforated plate can effectively control the position of the absorption peak, thereby ensuring higher sound absorption coefficient on the broadband. The micro-perforated plate silencer is used in the structure of the embodiment of the invention, and has a relatively obvious sound absorption effect.

In addition, in the embodiment of the invention, the first cover body 1 is mainly used for wrapping the motor 14, so that the first cover body can be called as a motor cover, the second cover body 2 is mainly used for wrapping the air outlet flow channel, so that the second cover body can be called as an air outlet cover, the air outlet cover and the motor cover are arranged up and down, the noise elimination structure 3 is arranged in the air outlet cover, the structure is simple and easy to realize, and the noise elimination structure 3 adopts a single-layer micro-perforated plate silencer.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings and are used merely for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (19)

1. A motor assembly for a vacuum cleaner, comprising:

a first housing including a motor therein;

a second cover body connected with the first cover body and communicated with the first cover body, wherein the second cover body is provided with an air outlet,

and the silencing structure is arranged in the second cover body and is positioned between the first cover body and the air outlet.

2. The motor assembly for a vacuum cleaner according to claim 1, wherein the noise deadening structure comprises:

the first enclosing plate is provided with a plurality of silencing holes at intervals;

the first enclosing plate and the second enclosing plate are arranged in an embedded mode, and a closed silencing cavity is formed between the first enclosing plate and the second enclosing plate.

3. The motor assembly for a vacuum cleaner of claim 2, wherein the second shroud surrounds an outer side of the first shroud.

4. The motor assembly for a vacuum cleaner of claim 2, wherein a perforation rate of the plurality of muffling holes of the first enclosing plate

Wherein d is silencingThe aperture of the hole, B represents the distance between two adjacent muffling holes.

5. The motor assembly for a vacuum cleaner as claimed in claim 2, wherein at least two partition plates are disposed in the muffling chamber at intervals along a circumferential direction of the muffling chamber, the at least two partition plates distribute the muffling chamber into a plurality of cavities separated from each other, and each of the cavities communicates with an external space of the muffling chamber through the muffling hole.

6. The motor assembly of claim 2, wherein the noise dampening structure further comprises a first plate portion and a second plate portion, the first plate portion and the second plate portion each being connected to the first shroud and the second shroud, and the first plate portion, the second plate portion, the first shroud, and the second shroud defining the noise dampening chamber therebetween,

the outer edge of the second plate part is connected with one end of the second enclosing plate, the inner edge of the second plate part is provided with a first notch groove, and one end of the first enclosing plate is embedded into the first notch groove;

the inner side plate of the first plate part is provided with a second gap groove, and the other end of the first side plate is embedded into the second gap groove;

the outer edge of the first plate part is provided with a flange, and the other end of the second enclosing plate is embedded in the inner side of the flange.

7. A motor assembly for a vacuum cleaner according to any one of claims 1 to 6, wherein the first housing has at least one ventilation aperture therein, the motor being adapted to drive an airflow from within the first housing into the second housing through the ventilation aperture.

8. The motor assembly for a vacuum cleaner of claim 7, wherein the noise deadening structure has a ring shape and surrounds an outside of the ventilation hole.

9. The motor assembly as claimed in claim 8, wherein the first cover has a flange portion extending downward, and an upper edge of an inner circumferential surface of the noise-deadening structure has a third notch groove, and the flange portion is fitted into the third notch groove.

10. The motor assembly for a vacuum cleaner as claimed in claim 8, wherein a silencing hole communicating an inner space and an outer space of the silencing structure is formed on an inner sidewall or an outer sidewall of the silencing structure.

11. The motor assembly as claimed in claim 7, wherein the first housing and the second housing are arranged up and down, the motor extends up and down, and the ventilation holes are spaced apart in a direction around a motor shaft of the motor.

12. The motor assembly for a vacuum cleaner of claim 7, wherein a gap is provided between the noise deadening structure and the inner bottom surface of the second cover.

13. The motor assembly for a vacuum cleaner of claim 1, wherein a first buffer member is connected to the upper end of the motor and the upper end of the first cover, and a second buffer member is connected to the lower end of the motor and the lower end of the first cover.

14. The motor assembly as claimed in claim 13, wherein the first cover has an opening on a top surface thereof, and an inner edge of the opening has a first positioning protrusion extending downward, and the first positioning protrusion is embedded in the first buffer.

15. The motor assembly as claimed in claim 13, wherein the second buffer member is disposed on an inner bottom surface of the first cover and supported at a middle position of a lower end of the motor, a second positioning protrusion extending upward is disposed on an inner wall surface of the first cover, the second positioning protrusion is arranged along a circumferential direction of the first cover, and a lower end of the second buffer member is embedded inside the second positioning protrusion.

16. The motor assembly as claimed in claim 1, wherein the air outlet is disposed on both left and right sides of the second housing, and a filter member is disposed in the second housing and disposed at the air outlet, the filter member being adapted to filter the airflow flowing out of the air outlet.

17. The motor assembly according to claim 16, wherein a seal ring is disposed between the first cover and the second cover, an end periphery of the first cover is provided with an outwardly extending flange, the seal ring has a coating portion that coats the flange, and a lug that extends along a circumferential direction of the seal ring abuts against an upper surface of the filter member.

18. The motor assembly for a vacuum cleaner according to claim 17, wherein the filter member includes:

a filter screen;

the first cover plate covers the top of the filter screen;

the second cover plate is used for sealing the bottom of the filter screen;

wherein the lug abuts the first cover plate.

19. A vacuum cleaner, comprising:

a dirt cup having a dirt gas inlet and a dirt gas outlet;

a motor assembly, an inlet of the motor assembly is communicated with the dust and air inlet, and the motor assembly is used for the dust collector according to any one of claims 1-18.

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