WO2022183741A1

WO2022183741A1 - Noise reduction motor assembly and cleaning device

Info

Publication number: WO2022183741A1
Application number: PCT/CN2021/124189
Authority: WO
Inventors: 赵坚; 徐加信
Original assignee: 添可智能科技有限公司
Priority date: 2021-03-04
Filing date: 2021-10-15
Publication date: 2022-09-09
Also published as: CN116998092A

Abstract

A noise reduction motor assembly and a cleaning device. Specifically, a silencing partition plate (33) is provided between a motor (2) and a housing (1) of the noise reduction motor assembly, a solution of sound insulation of a single housing is changed to a solution of double-layer sound insulation of the housing (1) and the silencing partition plate (33), and the volume of sound insulation is increased. In addition, the silencing partition plate (33) is provided with a plurality of silencing holes (31), and noise of a corresponding frequency band of the motor (2) can be eliminated by consuming sound energy by means of vibration of air columns of hole necks of the silencing holes (31). Moreover, a blocking plate (4) is provided at an air outlet (12) in the housing (1), so that the airflow can be blocked from flowing directly to the air outlet (12), but flows to the air outlet (12) by means of the edge of the blocking plate (4), and the motor leakage noise at the position of the air outlet (12) can be reduced. Furthermore, the silencing partition plate (33) is semi-wrapped on the outer side of the motor (2), so that the circulation of airflow inside the housing (1) cannot be blocked, the characteristic loss is small, and the service performance of the noise reduction motor assembly is not affected.

Description

Noise reduction motor components and cleaning equipment

cross reference

This application refers to Chinese Patent Application No. 202110242037.5 filed on March 04, 2021 and entitled “Cleaning Robot and Mopping Element Bracket”, which is fully incorporated into this application by reference.

technical field

The present application relates to the field of electrical appliances, and in particular, to a noise reduction motor assembly and cleaning equipment.

Background technique

With the development of social productive forces, people's living standards have also been improved. On the premise that the material foundation is guaranteed, people begin to use various tools to reduce labor and improve the quality of life. There are a variety of household equipment on the market, such as hair dryers, hand-held vacuum cleaners, sweeping robots, hand-held washing machines, sweeping and mopping robots, and so on.

However, these devices still have a fly in the ointment, that is, the noise of the device operation is loud. Taking the carpet cleaning machine as an example, when the user uses the carpet cleaning machine to clean the carpet, the noise emitted by the motor seriously affects the user's experience, and also affects the rest and study of other members of the family.

SUMMARY OF THE INVENTION

In view of the above problems, various embodiments of the present application provide a noise reduction motor assembly, a handheld device, a cleaning device, and a cleaning robot with better noise reduction effect.

In one embodiment of the present application, a noise reduction motor assembly is provided. The noise reduction motor assembly includes:

housing, with air inlet and outlet;

a motor, which is arranged in the casing, and the air inlet end of the motor communicates with the air inlet, and the air outlet end of the motor communicates with the air outlet;

A sound-absorbing baffle is located between the casing and the motor, a plurality of sound-absorbing holes are arranged on the sound-absorbing baffle, and the noise-absorbing baffle is half-wrapped on the outside of the motor;

A baffle is arranged in the casing and is located at the air outlet, so that the airflow flowing to the baffle flows to the air outlet through the edge of the baffle.

In another embodiment of the present application, a noise reduction motor assembly is provided. The noise reduction motor assembly includes:

housing, with air inlet and outlet;

Wherein, the sound-absorbing baffle is a cylindrical structure;

The sound-absorbing baffle is provided with an opening extending along the axial direction of the cylindrical structure, so that the noise-absorbing baffle is half-wrapped on the outside of the motor along the circumferential direction of the motor;

The projection of the opening in the axial direction at least partially overlaps the air outlet.

In yet another embodiment of the present application, a cleaning device is provided. The cleaning equipment includes:

an equipment body, on which a cleaning component is arranged;

A noise reduction motor assembly, arranged on the device body;

Wherein, the noise reduction motor assembly includes:

housing, with air inlet and outlet;

In the technical solutions provided by the embodiments of the present application, a noise-absorbing baffle is arranged between the motor and the casing, and the sound insulation of a single casing is changed to a double-layered sound-proofing scheme of the casing and the noise-absorbing baffle, and the sound insulation is increased; in addition, the noise-absorbing baffle is provided with Multiple mufflers use the air column vibration of the muffler hole neck to consume sound energy, which can eliminate the noise in the corresponding frequency range of the motor; in addition, a baffle is set at the air outlet in the outer casing to block the direct flow of the air flow. The air outlet flows to the air outlet through the edge of the baffle plate, which can reduce the leakage noise of the motor at the air outlet position. Another point is that in each embodiment of the present application, the sound-absorbing baffle is half-wrapped on the outside of the motor, which does not block the flow of air flow inside the casing, and the characteristic loss is small, which does not affect the performance of the noise-reducing motor assembly.

In addition, the noise reduction motor assembly provided in the embodiments of the present application can be applied to a variety of devices, such as hand-held devices (hair dryers, hand-held vacuum cleaners, hand-held washing machines, etc.), cleaning robots (sweeping robots, sweeping and mopping integrated robots, etc.) .

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1a is a schematic cross-sectional view of a noise reduction motor assembly provided by an embodiment of the application;

Fig. 1b is a partial enlarged schematic diagram of Fig. 1a;

2 is an exploded schematic diagram of a noise reduction motor assembly provided by an embodiment of the application;

3 is a schematic structural diagram of a noise-absorbing baffle in a noise-reducing motor assembly provided by an embodiment of the application;

4 is a schematic cross-sectional view of a noise reduction motor assembly provided by an embodiment of the application;

5 is a schematic structural diagram of some components in the construction of a motor assembly according to an embodiment of the present application;

FIG. 6 is a partial enlarged schematic view of FIG. 5 .

Detailed ways

Taking the household washing machine as an example, in order to reduce the noise of the motor, the common design of most of the household washing machines is to add a soundproof shell outside the motor to prevent the noise from spreading. This noise reduction design, although its structure is simple, is too rough, and does not effectively solve the noise problem, and the noise reduction effect is not significant. That is to say, the design idea of noise reduction only from the perspective of blocking noise transmission cannot fundamentally weaken the noise emitted by the noise source.

To this end, the present application provides the following embodiments to provide a technical solution with a good noise reduction effect. In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It should be noted that the descriptions such as "first" and "second" in this document are used to distinguish different terminals, devices, components, structures, etc., and do not represent a sequential order. In addition, the embodiments described below are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of this application.

1a and 2 are schematic structural diagrams of a noise reduction motor assembly provided by an embodiment of the present application. As shown in FIG. 1 a and FIG. 2 , the noise reduction motor assembly includes: a housing 1 , a motor 2 , a noise-absorbing baffle 33 and a baffle 4 . The housing 1 has an air inlet 11 and an air outlet 12 . The motor 2 is disposed in the housing 1 , and the air inlet end 21 of the motor 2 communicates with the air inlet 11 , and the air outlet end 22 of the motor 2 communicates with the air outlet 12 . A sound-absorbing baffle 33 is located between the housing 1 and the motor 2 , and a plurality of sound-absorbing holes 31 are provided on the sound-absorbing baffle 33 (see FIG. 3 ). Referring to FIG. 1 a , FIG. 3 and FIG. 4 , the noise-absorbing baffle 33 is half-wrapped on the outside of the motor 2 . Here, the meaning of "half-pack" can be understood as: a part of the motor 2 is surrounded by the sound-absorbing baffle 33, and another part is not surrounded by the noise-absorbing baffle 33; in other words: a part of the motor 2 area The sound-absorbing baffle is arranged between the casing and the outer casing, and there is no sound-absorbing baffle between the remaining part of the region and the casing. The baffle 4 is arranged in the casing 1 and is located at the air outlet 12 , so that the air flow to the baffle 4 flows to the air outlet 12 through the edge of the baffle 4 .

As shown in FIGS. 1 a , 3 and 4 , the noise-absorbing baffle 3 is half-wrapped on the outside of the motor 2 . More specifically, the sound-absorbing baffle 33 is a cylindrical structure, and the sound-absorbing baffle 33 is provided with an opening extending in the direction of the axis 300 of the cylindrical structure, so that the noise-absorbing baffle 33 is along the motor. 2 circumferentially half wrapped around the outside of the motor 2 .

Along the direction perpendicular to the axis 300 , the sound-absorbing baffle 33 is transversely cut, because of the opening, the cross-section of the noise-absorbing baffle 33 is in a "C" shape, as shown in FIG. 4 .

Further, as shown in FIG. 4 , the angle a at which the noise-absorbing baffle 33 can be half-enclosed on the outside of the motor in the circumferential direction of the motor can be 240 degrees, 270 degrees, 300 degrees, and so on. That is, the value range of the angle a may be: 180-300 degrees. In essence, if the angle a is too small, the area of the sound-absorbing baffle will be small, and the sound-absorbing effect will be weakened; Reduce the efficiency of the motor. Therefore, in the specific implementation, the size of the angle a can be balanced according to the actual situation. Correspondingly, the central angle of the opening (ie, the angle θ in FIG. 3 ) ranges from 60 to 180 degrees. The sum of the angle a and the angle θ is 360 degrees.

In the embodiment shown in FIG. 3 , the baffle 4 is arranged at the opening. More specifically, the baffle 4 is perpendicular to the axis 300 of the sound-absorbing baffle 33 . The baffle 4 is detachably connected to the sound-absorbing baffle 33 , or the noise-absorbing baffle 33 and the baffle 4 are integrally formed.

Continuing to refer to FIG. 3 , the projection of the opening of the muffler baffle 33 in the axial direction at least partially overlaps the air outlet 12 . That is, the opening of the sound-absorbing baffle 33 is substantially aligned with the air outlet in the axial direction. The basic alignment here means that there is no need for complete alignment, and it is also possible to have a partial overlap in the middle. In FIG. 3 , the air outlet 12 is located directly below the baffle 4 . That is, in the embodiment shown in FIG. 3 , the projection of the opening of the sound-absorbing baffle 33 in the axial direction overlaps with the air outlet.

The edge of the mouth at the opening of the sound-absorbing baffle 33 is provided with a longitudinal baffle 35 extending toward the casing 1 and extending in the direction of the axis 300 . More specifically, as shown in FIG. 3 , the opening of the sound-absorbing baffle 33 has two corresponding mouth edges, and each of the two corresponding mouth edges is provided with a port extending toward the casing 1 and extending along the The longitudinal partition 35 extends in the direction of the axis 300 .

The purpose of arranging this longitudinal partition 35 may include, but is not limited to, one of the following: guiding the airflow to the baffle 4, facilitating placement of sound-absorbing materials between the sound-absorbing partition 33 and the housing 1 to prevent the sound-absorbing materials from running out, etc. In fact, the sound-absorbing material may or may not be placed. During the specific implementation, the sound-absorbing material may be selectively placed according to actual needs.

Referring to FIG. 4 , a connecting baffle 36 may also be provided on the sound-absorbing baffle 33 . A connecting groove 13 is provided on the inner wall of the casing 1 at a position corresponding to the connecting baffle 36 . The connecting baffle 36 is inserted into the connecting groove 13 to fix the relative positional relationship between the sound-absorbing baffle 33 and the housing 1 .

Further, in addition to the longitudinal partition 35 at the mouth edge of the opening of the sound-absorbing partition 33, the longitudinal partition 35 can also be set at other positions of the sound-absorbing partition 33, as shown in the embodiment shown in FIG. 4 , At a position between the longitudinal partition plate 35 and the connecting partition plate 36 at the mouth edge of the opening, a longitudinal partition plate is provided. The longitudinal partitions 35 arranged at these positions can play a role in strengthening the rigidity of the sound-absorbing partitions 33 , that is, the longitudinal partitions 35 arranged at these positions can be understood as rib plates. The number and position of the longitudinal partitions are not specifically limited in this embodiment, and may be determined according to the actual design size and requirements of the sound-absorbing partitions 33 .

Referring to Fig. 1a, along the direction of the axis 300, the sound-absorbing baffle 33 has an opposite first end 331 and a second end 332; the first end 331 of the sound-absorbing baffle 33 is inserted into the housing 1 in the corresponding slot. Referring to the partial enlarged view shown in FIG. 1b, a slot is provided at a corresponding position inside the shell of the housing 1, and the first end 331 of the noise-absorbing baffle 33 is inserted into the slot to complete the installation of the noise-absorbing baffle . The second end 332 of the sound-absorbing baffle 33 is provided with a transverse baffle 36 extending toward the casing 1 and perpendicular to the direction of the axis 300 . Among them, one function of the diaphragm 36 is to place sound-absorbing material or the like between the sound-absorbing baffle 33 and the casing 1 to prevent the sound-absorbing material from running out.

Further, as shown in FIG. 1 a , the noise reduction motor assembly may further include a noise reduction cover plate 34 . The sound-absorbing cover plate 34 is located on the side of the second end 332 of the sound-absorbing baffle plate 33 , and the sound-absorbing cover plate 34 is also provided with a plurality of sound-absorbing holes. It can be seen from FIG. 1 a that the muffler cover 34 is located between the end of the motor 2 and the upper top cover of the housing 1 .

Continuing to refer to FIGS. 3 and 4 , the size d of the opening at the second end 332 of the sound-absorbing baffle 33 is larger than the size D of the opening at the first end 331 . That is, the opening of the sound-absorbing baffle 33 has a structure with a large upper opening and a small lower opening, that is, the medial baffle 35 provided at the mouth edge of the opening of the noise-absorbing baffle 33 is an inclined media diaphragm. The two oppositely inclined longitudinal partitions 35 can play the role of drainage, so as to divert the airflow to the baffle 4 .

In order to further improve the noise reduction effect of the noise reduction motor assembly, that is, to further reduce noise, a sound absorbing material, specifically a porous sound absorbing material, can be arranged between the casing 1 and the sound-absorbing baffle 33 . Specifically, most of the sound-absorbing materials are loose and porous materials, such as slag wool, blankets, etc. The sound-absorbing mechanism is that the sound waves penetrate into the pores of the material, and the pores are mostly open pores that penetrate each other inside, and are subject to friction and viscous resistance of air molecules. And make the fine fibers make mechanical vibration, so that the sound energy is converted into heat energy. In the embodiment shown in FIG. 4 , there is a gap between the housing 1 and the sound-absorbing baffle 33 to form a sound-absorbing cavity; the sound-absorbing material is arranged in the sound-absorbing cavity. The arrangement of the above-mentioned longitudinal partitions, transverse partitions, etc., can confine the sound-absorbing material in the sound-absorbing cavity, and will not run out to other spaces.

Further, the muffler cavity and the muffler baffle 33 form a perforated plate resonance muffler structure; when the frequency of the incident sound wave and the frequency of the perforated plate resonance muffler structure reach the resonance condition, the The air column of the plurality of muffler necks vibrates to dissipate sound energy.

Of course, in the specific implementation, there may also be a certain gap between the sound-absorbing baffle 33 and the motor 2 , and the size of the gap is not specifically limited in this embodiment, and needs to be determined according to actual design requirements.

Referring to FIG. 1 a , the air inlet end 21 of the motor 2 is sealedly connected to the air inlet 11 through a sealing ring 5 . Further, the air inlet 11 and the air outlet 12 are located on the shell wall on the same side of the casing 1 . Specifically, in the embodiment shown in FIG. 1 a , the air inlet 11 and the air outlet 12 are both disposed on the bottom cover of the housing 1 . When the motor 2 is working, the airflow enters the motor 2 through the air inlet 11, and is discharged from the air outlet 22 of the motor 2 to the baffle 4 and flows to the air outlet 12; The air column in the necks of the plurality of muffler holes 31 on 33 consumes sound energy by vibration, and the baffle 4 blocks the airflow from directly flowing to the air outlet 12 .

More specifically, the air outlet 12 may also be provided with an air outlet grill 6 . With reference to Fig. 1a, Fig. 5 and Fig. 6 , the air outlet 1 is provided with an air outlet grid 6, and a baffle plate 4 is provided above the air outlet grid 6. As shown in Figs. After the airflow reaches the baffle 4 , it flows from the edge of the baffle 4 to the air outlet grille 6 . The baffle 4 blocks the airflow from directly flowing to the air outlet grille 6, which can reduce the leakage noise of the motor at the air outlet.

To sum up, the embodiments of the present application provide a noise reduction motor assembly. In the scheme of the noise-reducing motor assembly, a noise-absorbing baffle is arranged between the casing and the motor, and the structure is simple and easy to implement. The sound insulation of the single casing is changed to the double-layer sound-proofing scheme of the casing and the noise-absorbing baffle, and the sound insulation is increased; A muffler cavity is formed between the muffler baffles. The air column vibration of the muffler hole neck on the muffler baffle plate is used to dissipate sound energy, which can eliminate the noise in the specific frequency range of the motor. In order to achieve better noise reduction effect, it can also be used in the muffler cavity. Porous sound-absorbing material is added; furthermore, a baffle is arranged at the air outlet in the casing, which can block the airflow from directly flowing to the air outlet, but flow to the air outlet through the edge of the baffle, which can reduce the The motor at the air outlet is leaking noise. Another point is that in each embodiment of the present application, the sound-absorbing baffle is half-wrapped on the outside of the motor, which does not block the flow of airflow inside the casing, and the characteristic loss is small, which does not affect the performance of the noise-reducing motor assembly.

It should be noted here that the effect of eliminating noise in a specific frequency range of the motor is related to factors such as the muffler cavity, the number and size of the muffler holes on the muffler baffle. The silencing cavity between the shell and the silencing baffle, and the multiple silencing holes set on the silencing baffle form the perforated plate resonance silencing structure; when the frequency of the incident sound wave is close to the natural frequency of the perforated plate resonance silencing structure, the air column in the hole neck Strong vibration is generated, and sound energy is consumed by overcoming frictional resistance during the vibration process. At the same time, the air in the cavity will also vibrate with the sound wave, and the sound energy will be lost due to the effects of viscous damping and heat conduction. Therefore, in the specific implementation, according to the design needs, for example, when the design needs to eliminate the noise of a certain frequency band, the design and calculation of the volume of the muffler cavity, the size and quantity of the muffler holes, etc. can be carried out in a targeted manner. Specific restrictions.

Further, as shown in FIG. 3 , the sound-absorbing baffle 33 and the baffle 4 are integrally constructed, ie, one part, so that assembly steps can be reduced during assembly, and the structure is simpler and easier to implement.

In addition to the gap between the sound-absorbing baffle 33 and the housing 1 , there is also a gap between the sound-absorbing baffle 33 and the motor 2 , and this gap forms an airflow channel. With reference to Fig. 1a, a part of the air flow at the air outlet end of the motor flows to the air outlet through the air flow channel. Further, a part of the airflow flowing out of the air outlet end of the motor 2 passes through the airflow channel, and a part of the airflow passes through the opening to jointly flow to the air outlet 12 .

The noise reduction motor assemblies provided in the above embodiments are suitable for use in various types of equipment, such as handheld equipment, cleaning equipment, cleaning robots, and so on. The following will describe the specific structure and corresponding scenarios.

This embodiment provides a handheld device with the aforementioned noise reduction motor assembly. The hand-held device may be: a hair dryer, a curling iron, a hand-held vacuum cleaner, a hand-held scrubber, and the like. The handheld device includes a device body and a noise reduction motor assembly. The specific shape of the device body is related to the type of the handheld device, and the appearance and some internal details of the device body in this embodiment are not specifically limited. The noise reduction motor assembly is provided in the device body. Referring to FIGS. 1 a , 2 , 3 and 4 , the noise reduction motor includes: a housing 1 , a motor 2 , a noise-absorbing baffle 33 and a baffle 4 . The housing 1 has an air inlet 11 and an air outlet 12 . The motor 2 is disposed in the housing 1 , and the air inlet end 21 of the motor 2 communicates with the air inlet 11 , and the air outlet end 22 of the motor 2 communicates with the air outlet 12 . A sound-absorbing baffle 33 is located between the housing 1 and the motor 2 , and a plurality of sound-absorbing holes 31 are provided on the sound-absorbing baffle 33 (see FIG. 3 ). The sound-absorbing baffle 33 is half-wrapped on the outside of the motor 2 . The baffle 4 is arranged in the casing 1 and is located at the air outlet 12 , so that the air flowing to the baffle 4 flows to the air outlet 12 through the edge of the baffle 4 .

For a more detailed structure of the noise reduction motor assembly, please refer to the dependencies above. The handheld device provided in this embodiment will be described below with reference to scenarios.

Application Scenario One

The first user used a hand-held scrubber at home to clean the floor of the home. Because the motor of the hand-held washing machine is noisy, after cleaning for a period of time, the user feels that the noise is too loud and uncomfortable. In addition, the elderly and children at home also hate this noise very much. The user has to choose to use it when the family is out. In the long run, because the use conditions are too limited, the frequency of use of the hand-held washing machine becomes less and less.

A second user opted to purchase a hand-held scrubber with a noise-cancelling motor assembly. The user uses the hand-held scrubber to clean the ground at home. During the cleaning process, the suction air generated by the motor's operation enters the air inlet end of the motor through the air inlet of the casing, and then is discharged from the air outlet end of the motor. Because there is a noise-absorbing baffle between the casing of the motor assembly and the motor, the noise-absorbing cavity between the noise-absorbing baffle and the casing, and the noise-absorbing holes on the noise-absorbing baffle work together to consume part of the sound energy generated during the operation of the motor. , thereby reducing the noise; after the air flow passes through the baffle at the air outlet, it is discharged through the air outlet, which reduces the leakage noise of the motor at the air outlet. During use, the user has a better overall experience, and will not hear harsh and uncomfortable noises, but in a mild, low-noise clean environment, the user experience is good, and he does not need to avoid family members.

This embodiment also provides a cleaning device. The cleaning equipment may be: vacuum cleaners (such as vacuum cleaners that require manual driving), floor washing machines (such as floor washing machines that require manual driving used in large-scale scenarios such as supermarkets), household vacuum cleaners, floor washing machines, and the like. The cleaning device includes: a device body on which a cleaning assembly is arranged. The noise reduction motor assembly is arranged on the device body. Wherein, as shown in FIGS. 1 a , 2 , 3 and 4 , the noise-reducing motor includes: a casing 1 , a motor 2 , a noise-absorbing baffle 33 and a baffle 4 . The housing 1 has an air inlet 11 and an air outlet 12 . The motor 2 is disposed in the housing 1 , and the air inlet end 21 of the motor 2 communicates with the air inlet 11 , and the air outlet end 22 of the motor 2 communicates with the air outlet 12 . A sound-absorbing baffle 33 is located between the housing 1 and the motor 2 , and a plurality of sound-absorbing holes 31 are provided on the sound-absorbing baffle 33 (see FIG. 3 ). The sound-absorbing baffle 33 is half-wrapped on the outside of the motor 2 . The baffle 4 is arranged in the casing 1 and is located at the air outlet 12 , so that the air flow to the baffle 4 flows to the air outlet 12 through the edge of the baffle 4 .

For a more detailed structure of the noise reduction motor assembly, please refer to the dependencies above. The handheld device provided in this embodiment is described below with reference to the second scenario.

Application Scenario 2

In the supermarket, the staff uses the washing machine to clean the supermarket floor. A noise-cancelling motor assembly is used on this scrubber. When the scrubber is working, the noise reduction motor assembly works to generate suction air. The air layer muffler cavity between the casing and the muffler baffle in the noise reduction motor assembly, and a plurality of muffler holes on the muffler baffle form a perforated plate resonance muffler structure. When the noise frequency generated by the operation of the noise reduction motor assembly is close to the natural frequency of the perforated plate resonance muffler structure, the air column of the muffler hole neck produces strong vibration, and the sound energy is consumed due to overcoming the frictional resistance during the vibration process. The air in the cavity will also vibrate with the sound wave, and the sound energy will be lost due to viscous damping and heat conduction. In addition, the baffle plate disposed at the air outlet of the housing of the motor assembly can prevent the airflow from directly flowing to the air outlet, thereby reducing the leakage noise of the motor at the air outlet. When the staff uses the washing machine, there will be no loud noise; even in the supermarket, it can be used without affecting customers.

The noise reduction motor assembly provided in the embodiment of the present application can also be applied to a cleaning robot. That is, another embodiment of the present application provides a cleaning robot, such as a cleaning robot, a sweeping and mopping integrated robot, a cleaning robot, and the like. Similarly, this embodiment does not specifically limit the appearance structure and internal detailed structure of the cleaning robot, and it is only necessary to replace the motor assembly on the original cleaning robot with the noise reduction motor assembly provided in this embodiment. Specifically, the cleaning robot includes a robot body and a noise reduction motor assembly. Wherein, the robot body is provided with a traveling device and a cleaning component; the noise reduction motor component is arranged on the robot body. As shown in FIGS. 1 a , 2 , 3 and 4 , the noise reduction motor includes: a housing 1 , a motor 2 , a noise-absorbing baffle 33 and a baffle 4 . The housing 1 has an air inlet 11 and an air outlet 12 . The motor 2 is disposed in the housing 1 , and the air inlet end 21 of the motor 2 communicates with the air inlet 11 , and the air outlet end 22 of the motor 2 communicates with the air outlet 12 . A sound-absorbing baffle 33 is located between the housing 1 and the motor 2 , and a plurality of sound-absorbing holes 31 are provided on the sound-absorbing baffle 33 (see FIG. 3 ). The sound-absorbing baffle 33 is half-wrapped on the outside of the motor 2 . The baffle 4 is arranged in the casing 1 and is located at the air outlet 12 , so that the air flow to the baffle 4 flows to the air outlet 12 through the edge of the baffle 4 .

For a more detailed structure of the noise reduction motor assembly, please refer to the dependencies above. The handheld device provided in this embodiment is described below with reference to the third scenario.

Application Scenario Three

A noise reduction motor assembly is installed on the household cleaning robot. Because the noise of the household cleaning robot is low when working, the user sets the time when the household cleaning robot can fall asleep, for example, after 00:00, to start the work to clean the ground at home.

When the household sweeping robot is working, the suction air generated by the operation of the motor enters the air inlet end of the motor through the air inlet of the casing, and then is discharged from the air outlet end of the motor. Because there is a noise-absorbing baffle between the casing of the motor assembly and the motor, the noise-absorbing cavity between the noise-absorbing baffle and the casing, and the noise-absorbing holes on the noise-absorbing baffle work together to consume part of the sound energy generated during the operation of the motor. , thereby reducing the noise; after the air flow passes through the baffle at the air outlet, it is discharged through the air outlet, which reduces the leakage noise of the motor at the air outlet. Due to the low noise of the sweeping robot, users can use the sweeping robot for cleaning during family breaks, while children are studying, etc., regardless of the use time, and the use is more flexible.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A noise reduction motor assembly, characterized in that it includes:

housing, with air inlet and outlet;

a motor, which is arranged in the casing, and the air inlet end of the motor communicates with the air inlet, and the air outlet end of the motor communicates with the air outlet;

A sound-absorbing baffle is located between the casing and the motor, a plurality of sound-absorbing holes are arranged on the sound-absorbing baffle, and the noise-absorbing baffle is half-wrapped on the outside of the motor;

A baffle is arranged in the casing and is located at the air outlet, so that the airflow flowing to the baffle flows to the air outlet through the edge of the baffle.
The noise reduction motor assembly according to claim 1, wherein the noise reduction baffle is a cylindrical structure;

The sound-absorbing baffle is provided with an opening extending along the axis direction of the cylindrical structure, so that the noise-absorbing baffle is half-wrapped on the outer side of the motor along the circumferential direction of the motor.
The noise reduction motor assembly according to claim 2, wherein the baffle is provided at the opening.
The noise reduction motor assembly according to claim 3, wherein the noise-absorbing baffle and the baffle are integrally formed.
The noise reduction motor assembly according to claim 2, wherein the edge of the opening of the sound-absorbing baffle is provided with a longitudinal baffle extending toward the housing and extending along the axis direction.
The noise reduction motor assembly according to claim 2, wherein the projection of the opening in the axial direction at least partially overlaps the air outlet.
The noise reduction motor assembly according to claim 2, wherein the range of the central angle of the opening is 60-180 degrees.
The noise-reducing motor assembly according to claim 1, wherein a connecting baffle is further provided on the sound-absorbing baffle;

A connecting groove is provided on the inner wall of the outer shell at a position corresponding to the connecting baffle;

The connecting baffle is inserted into the connecting groove to fix the relative positional relationship between the sound-absorbing baffle and the casing.
The noise reduction motor assembly according to claim 2 or 5, characterized in that, along the axis direction, the noise reduction baffle has a first end and a second end;

The first end of the sound-absorbing baffle is inserted into the corresponding slot of the housing;

The second end of the sound-absorbing baffle is provided with a transverse baffle extending toward the casing and perpendicular to the axis direction.
The noise reduction motor assembly according to claim 9, characterized in that, further comprising a muffler cover;

the sound-absorbing cover plate is provided on the second end side of the sound-absorbing baffle;

The sound-absorbing cover is provided with a plurality of sound-absorbing holes.
The noise reduction motor assembly according to claim 9, wherein the size of the opening at the second end of the noise-absorbing baffle is larger than the size of the opening at the first end.
The noise reduction motor assembly according to any one of claims 1 to 8, wherein a gap is formed between the casing and the sound-absorbing baffle to form a sound-absorbing cavity.
The noise reduction motor assembly according to claim 12, wherein the muffler cavity and the muffler baffle form a perforated plate resonance muffler structure;

When the frequency of the incident sound wave and the frequency of the perforated plate resonant sound-absorbing structure reach a resonance condition, the air columns of the plurality of sound-absorbing hole necks on the sound-absorbing baffle plate vibrate to consume sound energy.
The noise reduction motor assembly according to any one of claims 1 to 8, wherein the air inlet end of the motor is sealed at the air inlet through a sealing ring.
The noise reduction motor assembly according to claim 14, wherein the air inlet and the air outlet are located on the same side of the casing wall of the casing;

When the motor is working, the air flow enters the motor through the air inlet, and is discharged from the air outlet of the motor to the baffle and flows to the air outlet;

The baffle blocks the airflow from directly flowing to the air outlet.
The noise-reducing motor assembly according to any one of claims 2 to 7, wherein a gap is formed between the noise-absorbing baffle and the motor, the gap forms an air flow channel, and the air outlet end of the motor has a gap. A part of the airflow flows to the air outlet through the airflow channel.
The noise reduction motor assembly according to claim 16, wherein a part of the air flowing out of the air outlet end of the motor passes through the air passage, and a part of the air passes through the opening, and together flow to the air outlet.
A noise reduction motor assembly, characterized in that it includes:

housing, with air inlet and outlet;

a motor, which is arranged in the casing, and the air inlet end of the motor communicates with the air inlet, and the air outlet end of the motor communicates with the air outlet;

A sound-absorbing baffle is located between the casing and the motor, a plurality of sound-absorbing holes are arranged on the sound-absorbing baffle, and the noise-absorbing baffle is half-wrapped on the outside of the motor;

Wherein, the sound-absorbing baffle is a cylindrical structure;

The sound-absorbing baffle is provided with an opening extending along the axial direction of the cylindrical structure, so that the noise-absorbing baffle is half-wrapped on the outside of the motor along the circumferential direction of the motor;

The projection of the opening in the axial direction at least partially overlaps the air outlet.
A cleaning device, characterized in that it includes:

an equipment body, on which a cleaning component is arranged;

A noise reduction motor assembly, arranged on the device body;

Wherein, the noise reduction motor assembly includes:

housing, with air inlet and outlet;

a motor, which is arranged in the casing, and the air inlet end of the motor communicates with the air inlet, and the air outlet end of the motor communicates with the air outlet;

A sound-absorbing baffle is located between the casing and the motor, a plurality of sound-absorbing holes are arranged on the sound-absorbing baffle, and the noise-absorbing baffle is half-wrapped on the outside of the motor;

A baffle is arranged in the casing and is located at the air outlet, so that the airflow flowing to the baffle flows to the air outlet through the edge of the baffle.