CN218419711U

CN218419711U - Motor element, cleaning device, floor washing machine and robot

Info

Publication number: CN218419711U
Application number: CN202221833415.3U
Authority: CN
Inventors: 刘琰; 李彦卿; 王丰; 夏宝康; 易生尧; 钱文琪
Original assignee: Tineco Intelligent Technology Co Ltd
Current assignee: Tineco Intelligent Technology Co Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2023-02-03
Anticipated expiration: 2032-07-14
Also published as: CN220857789U

Abstract

The embodiment of the utility model provides a pair of motor element, cleaning device, floor cleaning machine and robot. Wherein the motor assembly includes a first housing; the breathable sound insulation piece is arranged in the first shell and divides the space in the first shell into an inner cavity and an outer cavity; the motor is positioned in the inner cavity; the outer cavity is used as an air outlet channel surrounding the periphery of the motor, the outer cavity is provided with an air outlet, and the air outlet and the air inlet of the motor are positioned at the same end side of the breathable sound insulation piece; when the motor works, airflow enters the motor from the air inlet, and the air outlet airflow of the motor penetrates through the breathable sound insulation piece to enter the air outlet channel and is discharged from the air outlet. The utility model discloses technical scheme, the air-out air current hinders the motor noise and outwards propagates in the air-out passageway and parcel in the motor periphery, still can make the frequency of noise change to reach the purpose of making an uproar.

Description

Motor element, cleaning device, floor washing machine and robot

Technical Field

The utility model relates to an electrical equipment field especially relates to a motor element, cleaning device, scrubber and robot.

Background

At present, small household cleaning appliances such as dust collectors, floor sweeping robots, floor washers, handy suckers and the like all use motors as power sources to generate suction airflows and clean dust, liquid, mites and the like on the surfaces to be cleaned such as the ground and bed surfaces by using the suction airflows.

When users use the equipment, the operation of the motor causes higher noise of the equipment due to factors such as mechanical vibration, air flow disturbance and the like, and the use comfort of the users is not high.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made to solve the above problems or at least partially solve the above problems, and an electric motor assembly, a cleaning apparatus, a floor washing machine, and a robot thereof.

An embodiment of the utility model provides a motor element, include:

a first housing;

the breathable sound insulation piece is arranged in the first shell and divides the space in the first shell into an inner cavity and an outer cavity;

a motor located within the inner cavity;

the outer cavity is used as an air outlet channel surrounding the periphery of the motor, the outer cavity is provided with an air outlet, and the air outlet and an air inlet of the motor are positioned on the same end side of the breathable sound insulation piece;

when the motor works, airflow enters the motor from the air inlet, and the air outlet airflow of the motor penetrates through the breathable sound insulation piece to enter the air outlet channel and is discharged from the air outlet.

Optionally, the air outlet is an annular air outlet; the annular tuyere ring is arranged on the outer side of the air inlet for a circle.

Optionally, the breathable acoustic barrier member comprises: a side wall surrounding an outer side of the motor; a plurality of air holes are formed in the side wall; the air outlet area of the air holes is larger than the air inlet area of the air inlet.

Optionally, the breathable acoustic barrier further comprises: the annular wall plate extends from the outer side of the side wall to the direction far away from the side wall; the annular wall plate is provided with the air outlet; the air outlet area of the air outlet is larger than the air inlet area of the air inlet.

Optionally, the air permeable, sound insulating member has two opposing first and second ends; an elastic piece is arranged at the first end; the elastic piece is provided with a through hole corresponding to the air inlet; the motor is limited at the first end through the elastic piece.

Optionally, the distance between the first shell and the air-permeable and sound-insulating member gradually increases from the second end to the first end.

Optionally, the motor assembly further includes: and the second shell is arranged on the outer side of the first shell so as to form a sound insulation cavity between the first shell and the second shell.

Optionally, a sound insulation material is arranged in the sound insulation cavity.

Optionally, the first shell and the second shell are made of different materials; and/or the first shell and the air-permeable sound-insulating piece are made of different materials.

Optionally, the second housing comprises a front cover and a rear cover connected; the rear cover is sleeved on the outer side of the first shell; the front cover is provided with an air inlet channel communicated with the air inlet and an air outlet channel communicated with the air outlet; the axis of the air inlet duct and the axis of the motor form an angle.

The embodiment of the utility model also provides a cleaning device, which comprises a device body, the motor component and the cleaning device provided by the embodiment; wherein the motor assembly is provided on the apparatus body for generating a suction airflow. The cleaning device is provided on the apparatus body, and cleans an object to be cleaned by the suction airflow.

In particular implementations, the cleaning device may include, but is not limited to: sweeping robots, hand-held cleaners, floor washers, sweeping and mopping robots, and the like.

Another embodiment of the utility model provides a floor cleaning machine. The floor washing machine comprises a floor washing machine main body, the motor assembly and the cleaning equipment. Wherein the motor assembly is provided on the scrubber body for generating a suction airstream. The cleaning device is arranged on the floor cleaning machine main body and cleans the cleaned object by utilizing the suction airflow.

In other embodiments, the present invention provides an electromechanical apparatus that can be used in a robot. The robot may be any service-type robot, such as a sewage recycling robot, a sweeping robot, an air cleaning robot, and the like, which is not limited in this embodiment. Wherein, the robot includes robot organism and the motor element that above-mentioned embodiment provided. The motor assembly is arranged on the robot body and used for generating suction airflow.

In the technical scheme of the embodiment of the utility model, a ventilating sound-insulating part is arranged in the first shell to divide the space in the first shell into an inner cavity and an outer cavity, and the motor is positioned in the inner cavity; the outer cavity serving as an air outlet channel surrounding the periphery of the motor is provided with an air outlet, and the air outlet and the air inlet of the motor are positioned on the same side; therefore, after the air outlet airflow generated by the motor enters the air outlet channel through the breathable sound insulation piece, the air outlet airflow is positioned at the same side as the air inlet, and the air outlet airflow is arranged in the air outlet channel and wraps the periphery of the motor to form a wind wall, so that the noise of the motor is prevented from being spread outwards, and the noise is isolated in the wind wall; in addition, because of the air current disturbance around the outside of the motor in the air outlet channel, the frequency of the noise can be changed, and the purpose of noise reduction is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a motor assembly according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an explosion structure of a motor assembly according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a breathable sound insulation member according to an embodiment of the present invention;

fig. 4 is a schematic three-dimensional structure view of the air-permeable sound-insulating member and the front cover of the motor cover according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a first housing and a breathable sound insulation member according to an embodiment of the present invention;

fig. 6 is a schematic view of a floor washing machine according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, that a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. In addition, in the embodiments of the present invention, a plurality means two or more. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Some cleaning devices need to use a motor to perform some functions, for example, a vacuum cleaner or a vacuum module on the cleaning device needs to generate negative pressure by the operation of the motor to perform the function of vacuum cleaning. However, the motor generates noise during operation, and the noise is mainly classified into two types, one is machine frequency noise generated by mechanical vibration, and the other is aerodynamic noise generated by air flow. In the classification of noise, the relatively low frequency of machine frequency noise is low frequency noise, while the relatively high frequency of aerodynamic noise is high frequency noise. Whether high-frequency noise or low-frequency noise needs a propagation medium (gas, liquid or solid) in the propagation process, and the resonance of the system can be understood as the transmission or diffusion of sound waves through the liquid or the solid. In the process of sound wave propagation, the vibration frequency is influenced by the natural frequency of the propagation medium, when the frequency of the sound wave is the same as the natural frequency of the propagation medium, the amplitude of the propagation medium can reach the maximum, and meanwhile, the propagation efficiency of the sound is also the highest. The natural frequency of the propagation medium is determined primarily by two important parameters, mass and stiffness, respectively, with higher mass and lower natural frequency for a given stiffness.

Based on the above principle, the utility model provides a motor element to a noise problem for solving the motor when the operation.

It should be noted that the present invention provides a motor assembly suitable for sucking air flow through a motor and cleaning equipment, such as a vacuum cleaner, a floor cleaning machine, a cleaning robot, etc., for collecting garbage due to negative pressure generated by the sucked air flow. Besides, the motor assembly can also be suitable for some equipment which outputs airflow through the operation of the motor, such as an air purifier, a blower and the like.

Fig. 1 is a schematic sectional view of a motor assembly according to an embodiment of the present invention, and fig. 2 is a schematic exploded view of a motor assembly according to an embodiment of the present invention. Referring to fig. 1 and 2, the direction of the arrow in fig. 1 is the direction of the air flow when the motor 1 is in operation, and the arc line indicates the propagation and diffusion direction of the sound wave. An embodiment of the present invention provides a motor assembly, which includes: first casing 2, ventilative noise insulation 3 and motor 1. The air-permeable sound insulator 3 is disposed in the first housing 2, and divides the space in the first housing 2 into an inner cavity 211 and an outer cavity 212. The motor 1 is located in the inner cavity 211. The outer cavity 212 is used as an air outlet channel surrounding the periphery of the motor 1, the outer cavity 212 is provided with an air outlet 2120, and the air outlet 2120 and the air inlet 13 of the motor are located on the same end side of the air-permeable and sound-insulating member. When the motor works, airflow enters the motor 1 from the air inlet 13, and the air outlet airflow of the motor 1 enters the air outlet channel through the breathable sound insulation piece 3 and is discharged from the air outlet 2120 at the same end side of the breathable sound insulation piece.

The propagation process of the sound wave is the propagation process of vibration energy, and the vibration can push surrounding air to form invisible waves and shape diffusion. The waveform propagation in low-speed or static air is affected little, and the original state propagation can be maintained. However, in the case of a high air flow velocity, the wave vibration surface cannot maintain the original propagation form, and the corrugation is spatially displaced and dispersed to deform along with the air flow direction, and the deformation is larger at a higher speed. Based on the principle, the utility model provides a mode through formation "wind wall" subdues the noise. Specifically, in the technical scheme of this embodiment, after the outlet air flow generated by the motor 1 enters the outlet air channel through the air-permeable sound-insulating member 3, because the air outlet 2120 of the outlet air channel and the air inlet of the motor 1 are located at the same side, the outlet air flow is in the outlet air channel and wraps the periphery of the motor 1 to form a "wind wall", the fast flowing air flow breaks through the propagation path of the original relatively quiet air propagation noise, the noise of the motor is prevented from propagating outwards, and the noise is isolated within the "wind wall"; in addition, because of the air current disturbance around the outside of the motor in the air outlet channel, the frequency of the noise can be changed, and the purpose of noise reduction is achieved.

In an implementation example, as shown in fig. 1, the first casing 2 may be a thin-walled structure with an open end, the motor 1 is disposed in a cavity of the first casing 2, and an inner cavity structure 21 is disposed between the motor 1 and the first casing 2. The air-permeable sound-insulating member 3 is disposed in the inner cavity structure 21, surrounds the outside of the motor 1, and partitions the inner cavity structure 21 into an inner cavity 211 and an outer cavity 212. As shown in fig. 1, the air-permeable sound insulator 3 may be a sleeve structure with both ends open. The first housing 2 may include a bottom wall and a side wall, which form a cylindrical housing. One end of the air-permeable sound-insulating member 3 may be attached to the bottom wall of the first housing 2; the space between the air-permeable sound-insulating member 3 and the side wall of the first housing 2 is an outer cavity 212; the space between the air-permeable sound-insulating member 3 and the motor is an inner cavity 211.

In one embodiment of the present invention, the air-permeable sound-insulating member 3 may be provided in one or more than one. When a plurality of air-permeable sound-insulating members 3 are provided, it is possible that the air-permeable sound-insulating members 3 are fitted to each other, for example, one or more air-permeable sound-insulating members 3 having a slightly larger structural size are fitted to the outside of one air-permeable sound-insulating member 3, and then all the air-permeable sound-insulating members 3 are disposed in the inner cavity structure 21 to form a multi-layered sound-insulating cavity outside the motor.

In one embodiment provided by the present invention, the first end 11 of the motor 1 is connected to the bottom of the cavity. In particular, a through hole 20 is provided in the bottom wall of the first housing 2, said through hole being adapted to the first end 11 of the electric motor 1. The first end of the motor 1 is a hollow structure, and the hollow structure is used for leading out a circuit of the motor 1.

For example, in one embodiment, as shown in fig. 1 and 3, the air outlet of the air outlet channel (i.e., the outer cavity 212) is an annular air outlet; the annular air opening is formed around the outer side of the air inlet 13.

More specific example, referring to fig. 1 to 3, the breathable acoustic insulator 3 includes: a side wall 31 surrounding the outside of the motor 1; the sidewall 31 is provided with a plurality of air holes 311. The air outlet area of the plurality of air holes 311 is larger than the air inlet area of the air inlet 13 of the motor 1. The air-permeable acoustic insulator 3 further includes: an annular wall plate 32 extending from the outer side of the side wall 31 in a direction away from the side wall 31; the annular wall plate 32 is provided with the air outlet 2120. Similarly, the air outlet area of the air outlet 2120 is larger than the air inlet area of the air inlet 13 of the motor 1. As shown in fig. 3, a plurality of air holes 311 are formed in the annular wall plate 32; the air holes 311 together form the air outlet 2120.

In practical implementation, the smaller the pore size of the air holes 311 on the side wall 31, the better the sound insulation effect, and the pore size of the air holes is not particularly limited in this embodiment. The number and size of the air holes can be set according to actual product requirements. Furthermore, the size of the air holes in the annular wall 32 may be larger than the size of the air holes in the side wall 31. In one embodiment, to ensure the silencing effect of the air holes, as shown in fig. 3, the air holes on the side wall 31 and the annular wall plate 32 are densely arranged and are uniformly arranged with a constant left-right distance. The pore diameter is in the range of [2mm to 0.5mm ], for example, 1mm may be selected.

In order to ensure that the air-permeable sound-insulating member 3 has a good sound-deadening effect, the air-permeable sound-insulating member 3 has a certain thickness, which is in a range of [2mm to 4mm ], for example, 3mm is selected, and by making the air-permeable sound-insulating member 3 have a certain thickness, not only the mass and rigidity of the air-permeable sound-insulating member 3 can be increased, but also each air hole on the air-permeable sound-insulating member 3 can be made into a pipeline with a diameter of 1mm and a length of 3 mm. The micropore pipe wall air current receives the pipeline restriction with the acoustic wave transmission, the sound source is with the often transmission vibration sound wave all around of spherical wave form, only with the partial ripple of pipeline axial vertically can not have the ejection of energy loss, when there is the contained angle in incident angle and micropore axial, except that the condition that partial ripples diffuse reflection that shakes caused the pile of ripples, refraction transmission comes out in the partial accessible pipeline in addition, this part is because acoustic absorption coefficient etc. will change, also comparatively easy quilt is eliminated, so on the whole, the micropore has fine noise cancelling effect.

The air outlet areas of the plurality of air holes 311 on the sidewall 31 may be equal to or different from the air outlet areas of the plurality of air holes on the annular wall plate 32. For example, the air outlet area of the plurality of air holes on the annular wall plate 32 is larger than the air outlet area of the plurality of air holes 311 on the sidewall 31.

As shown in fig. 1, the first casing 2 has an opening, the annular wall 32 of the air-permeable and sound-insulating member 3 extends along the radial direction of the inner cavity 21 of the first casing 2, the annular wall 32 closes the opening of the outer cavity 212, and the air holes 311 on the annular wall 32 form an air outlet 2120 of an air outlet channel.

As shown in fig. 1, the direction of the arrow in fig. 1 is the direction of the airflow when the motor 1 operates, and in a specific embodiment, an impeller is mounted on the rotating shaft of the motor 1, and when the motor 1 operates, the impeller rotates, and the rotating impeller disturbs the air, so that the air is sucked from the air inlet 13 of the motor 1 and then discharged from the air outlet 14 of the motor. The faster the impeller rotates, the faster the flow rate of the air flow discharged from the motor 1 is, and the greater the aerodynamic noise generated by the air flow having the faster flow rate is. After the air outlet flow of the motor enters the air outlet channel through the air permeable sound insulation member 3, the air outlet flow turns and is discharged from the air outlet channel air outlet 2120 on the same side as the motor air inlet 13, and then an air flow barrier is formed outside the motor. The machine frequency noise generated in the operation process of the motor 1 is diffused outwards in the form of spherical waves (circular arc lines in fig. 1), the air flow (airflow barrier for directional flow) in the air outlet channel disturbs the transmission of the noise in the air, and the relatively sharp high-frequency noise is blocked in the airflow barrier.

The embodiment of the present invention provides a shape of the air hole 311, but not limited to: circular holes, square holes, polygonal holes, elongated holes, and the like. As shown in the embodiment of fig. 3, the side wall 31 of the air-permeable, sound-insulating member 3 has a plurality of perforated regions which are uniformly distributed along the cross-sectional plane of the side wall 31 in the axial direction. For example, the side wall 31 has a circular cross section, and the central angle of each hole region is 30 to 90 degrees. The central angle between two adjacent hole regions may be 5 to 10 degrees. The area between two adjacent hole areas is a hole-free area. The pore area is evenly provided with air holes 311.

Referring to fig. 1 to 3, in one embodiment of the present invention, the air-permeable sound insulating member 3 further includes a connecting structure 33. A connecting structure 33 is provided on the annular wall plate 32 for connection with the first housing 2. Specifically, the connecting structure 33 is plural, such as two, three or more. A plurality of connecting structures 33 are provided at intervals along the circumferential direction of the annular wall plate 32 of the air-permeable sound insulating member 3. Specifically, the connecting structure 33 is a clamping mechanism. When the breathable sound insulation piece 3 is arranged in the inner cavity structure 21, the clamping structure is clamped on the first shell 2.

In another embodiment provided by the present invention, the air-permeable sound-insulating member 3 can be connected to the first housing 2 by a fastening member, in addition to the fastening portion. Specifically, the connecting structure 33 is provided with a connecting hole into which a fastener is connected through the first housing 2, thereby interconnecting the noise insulating member 3 and the first housing 2. The utility model provides an among the technical scheme, connection structure 33 not only enables noise insulation 3 and first casing 2 interconnect, can also improve the structural strength between lateral wall 31 and the annular wall board 32.

Further, as shown in fig. 1, the air-permeable sound insulator 3 has two opposite first and second ends. The first end is provided with an elastic part 6. The elastic part 6 is provided with a through hole corresponding to the air inlet 13. The motor 1 is limited at the first end of the air-permeable and sound-insulating member 3 through the elastic member 6. The elastic piece 6 can be made of a soft material with high damping, the motor is placed in a suspension mode due to the arrangement of the elastic piece 6, and vibration generated by the motor is isolated from other parts to the maximum extent. The elastic member 6 has a shock-absorbing effect. In addition to this, the elastic member 6 may also function as a seal to form a seal between the air inlet 13 of the motor 1 and the first end (which is open as shown in fig. 1) of the air-permeable noise-insulating member 3.

What needs to be added here is: the above "the air outlet 2120 and the air inlet 13 of the motor are located on the same end side of the air-permeable sound-insulating member", which can be understood as follows: the air outlet 2120 and the air inlet 13 of the motor are both located at the first end of the air-permeable and sound-insulating member.

In a particular embodiment, referring to fig. 1, the distance between the first shell 2 and the air-permeable sound insulator 3 becomes gradually larger from the second end to the first end of the air-permeable sound insulator 3. As shown in fig. 1, the spacing d1 is smaller than the spacing d2.

In this embodiment, the airflow speed at the air inlet 13 is constant under the condition that the rotation speed of the motor 1 is constant. The intake air amount of the motor 1 is generally equal to the exhaust air amount of the motor 1. When the airflow discharged from the motor 1 passes through the plurality of air holes 311 of the air-permeable sound-insulating member 3 and is discharged from the inner cavity 211 to the outer cavity 212 (i.e. the air outlet channel), the airflow rate in each air hole is mainly determined by the total area of the cross sections of the plurality of air holes 311, and when the total area is larger, the airflow rate per unit time per unit area is smaller, so the airflow rate passing through the air hole 311 is smaller, and when the total area of the cross sections of the plurality of air holes 311 is greater than or equal to the cross section area of the air inlet 13, the airflow rate passing through the air hole 311 is smaller than or equal to the airflow rate at the air inlet 13, thereby achieving the purpose of reducing the wind noise of the motor 1. From the second end of ventilative acoustic insulator 3 to first end, the design of first casing 2 with the interval grow gradually of ventilative acoustic insulator 3 is likewise to reducing the beneficial department of motor 1 wind noise.

As shown in the motor 1 shown in fig. 1, an air inlet 13 of the motor 1 is located at an end of the motor 1, an air outlet 14 of the motor is located at a middle of the motor 1, and the air outlet 14 of the motor is also located at a middle of the inner cavity 211, so that when the air outlet 14 located at the middle of the motor 1 discharges air flow, the air flow can be rapidly diffused into the whole inner cavity 211; then the air outlet air current gets into the air outlet passageway through a plurality of gas pockets 311, again along the opposite direction with motor air inlet direction, to the air outlet of the one end department that opens (promptly the interval is big) discharge, the air current flows smoothly, and can form syllable-dividing "wind wall".

In the process of sound wave propagation, the vibration frequency is influenced by the natural frequency of the propagation medium, when the frequency of the sound wave is the same as the natural frequency of the propagation medium, the amplitude of the propagation medium can reach the maximum, and meanwhile, the propagation efficiency of the sound is also the highest. The natural frequency of the propagation medium is determined primarily by two important parameters, mass and stiffness, respectively, with higher mass and lower natural frequency for a given stiffness. In one embodiment of the present invention, the material of the motor 1 is different from the material of the air-permeable sound-insulating member 3. The natural frequency of the motor 1 is different from that of the breathable sound-insulating member 3, the breathable sound-insulating member 3 is sleeved outside the motor 1, and most of noise generated by the motor 1 needs to be transmitted through the breathable sound-insulating member 3 and then spread outwards. When the machine frequency noise generated by the operation of the motor 1 is propagated to the air-permeable sound-insulating member 3, the efficiency of the machine frequency noise propagated and diffused outward through the air-permeable sound-insulating member 3 is remarkably reduced due to the difference between the natural frequencies of the two. Also, the motor air outlet 14 is located in the inner cavity 211, and when noise generated by the air outlet 14 is spread and diffused outwards through the air-permeable sound insulating member 3, the transmission efficiency will be significantly reduced due to the difference between the natural frequencies of the air-permeable sound insulating member 3 and air.

In another embodiment of the present invention, the material of the air-permeable sound-insulating member 3 is different from the material of the first housing 2. Similarly, when the material of the air-permeable sound-insulating member 3 is different from that of the first casing 2, the natural frequency of the air-permeable sound-insulating member is different from that of the first casing. The ventilative noise insulation 3 is arranged in the inner cavity structure 21, when the machine frequency noise generated by the operation of the motor 1 is spread and diffused outwards, the noise needs to pass through the ventilative noise insulation 3 and the first shell 2, and because the natural frequency of the ventilative noise insulation 3 is different from the natural frequency of the first shell 2, when the noise is spread and diffused from the ventilative noise insulation 3 to the first shell 2, the spreading efficiency is remarkably reduced, so that the noise which can be spread and diffused outwards through the first shell 2 is remarkably reduced.

Further, as shown in fig. 1, the motor assembly provided in this embodiment may further include a second housing 400. The second housing 400 is disposed outside the first housing 2 to form a soundproof cavity 41 between the first housing 2 and the second housing 400. As in the embodiment shown in fig. 4, sound-insulating cavity 41 may include a sidewall cavity 411 and a bottom cavity 412. The sound-insulating chamber 41 forms a relatively air-static sandwich, with the resonance producing a greater sound variation with greater sandwich spacing.

In practical implementation, the first casing 2 and the second casing 400 are made of different materials.

Referring to fig. 1 to 4, in an embodiment provided by the present invention, the second housing 400 includes a rear cover 4. The rear cover 4 is sleeved on the outer side of the first casing 2, and a gap is formed between the inner wall of the rear cover 4 and the outer wall of the first casing 2 to form a sound insulation cavity 41. For example, sound-dampening cavity 41 includes a sidewall cavity 411 and a bottom cavity 412. Specifically, the rear cover 4 has an open cavity, the first housing 2 is disposed in the open cavity, and the opening of the first housing 2 is in the same direction as the opening of the rear cover 4. The first housing 2 is disposed in the rear cover 4, and the sidewall cavity 411 and the bottom cavity 412 are sealed cavity spaces.

When the first housing 2 is placed in the rear cover 4, the bottom of the first housing 2 and the cavity of the rear cover 4 are connected to each other. Specifically, as shown in fig. 1, a connecting boss is provided in the central region of the cavity of the rear cover 4, and the connecting boss can be connected with the through hole in the middle of the bottom wall of the first casing 2 in a matching manner. A gap is arranged between the bottom wall of the first shell 2 and the bottom of the rear cover 4 to form a bottom cavity 412.

In order to further improve the sound insulation effect of the rear cover 4, the sound insulation cavity 41 is structurally filled with a sound insulation material 42. Specifically, the sound insulation material 42 is filled in the sidewall cavity 411 and the bottom cavity 412, and the sound insulation material 42 includes, but is not limited to: fine fiber materials, high resilience foam materials, and loose porous materials. When noise generated by the operation of the motor 1 is propagated and diffused through the sound-insulating material 42, the sound-insulating material 42 causes heat loss or viscous loss of sound waves, thereby reducing the noise.

Referring to fig. 1 to 4, in an embodiment provided by the present invention, the second housing further includes a front cover 5, and the front cover 5 is connected to the rear cover of the motor 1 in a matching manner to form a hollow cavity. Specifically, the front cover 5 is disposed at the opening of the rear cover 4, and the front cover 5 also has an open cavity, and when the front cover 5 and the rear cover 4 are connected to each other, the opening of the front cover 5 and the opening of the rear cover 4 are butted with each other to form a complete motor cover. The motor cover is internally provided with a cavity structure, and the motor 1 and the first shell 2 of the breathable sound insulation piece 3 are all accommodated in the cavity body.

Further, the front cover 5 is provided with an air inlet duct 51 and an air outlet duct 52. The air inlet passage 51 is in butt joint with the air inlet 13 of the motor 1, the air outlet passage 52 is positioned at one side of the outer cavity 212, and the air outlet 2120 is communicated with the air outlet passage 52. The air inlet duct 51 is used for guiding the air flow to the air inlet 13 of the motor 1, and the air outlet duct 52 is used for collecting and outputting the air flow output from the air outlet 2021. As shown in fig. 1, the axis of the air inlet duct 51 forms an angle with the axis of the motor 1, such as an angle in the range of 150 to 70 degrees. As shown in fig. 1, an angle between an axis 501 of the air inlet duct 51 and an axis 1001 of the motor 1 is 90 degrees.

As shown in fig. 2, in order to make the airflow output from the air outlet duct 52 have directionality, an air outlet bracket 7 is disposed at one end of the air outlet duct 52, and the air outlet bracket 7 is disposed at the end of the air outlet duct 52, so that the airflow output from the air outlet duct 52 can be further converged and discharged from an air outlet on the air outlet bracket 7. In addition, the air outlet support 7 is used for gathering air flow discharged from the air outlet duct 52 and improving the structural integrity of the motor 1 assembly, so that the motor 1 assembly can be better adapted to different household appliances.

The embodiment of the utility model provides a motor element can be used to all kinds of electrical equipment on, like cleaning device, hair-dryer, robot (like the robot that has the air purification function) etc.. Among them, the cleaning apparatus may include, but is not limited to: sweeping robots, sweeping and mopping integrated robots, floor washing machines, dust collectors, random suction and the like.

For example, in one embodiment of the present invention, a cleaning apparatus is provided. The cleaning equipment comprises an equipment body, a motor assembly and a cleaning device. Wherein, the cleaning device can be a suction head without a rolling brush on the dust collector, a suction head with a rolling brush, etc., or a floor brush on the floor washing machine, etc. The motor assembly can be realized by adopting the structure provided by the above embodiment, and specific contents can be referred to above, which are not described herein. The motor assembly is arranged on the equipment body, and the cleaning device is arranged on the equipment body and is used for cleaning the cleaned object by utilizing the suction airflow.

For another example, another embodiment of the present invention provides a robot, such as a robot with an air purification function, or a robot providing home services, etc. The robot includes: robot organism and motor element. The motor assembly may be implemented by using the structure provided in the above embodiment, and the specific content may be referred to above, which is not described herein again. The motor assembly is arranged on the robot body.

Fig. 6 shows a floor washing machine according to still another embodiment of the present invention. The scrubber comprises a scrubber body 81, a motor assembly 82 and a cleaning device 83. The motor assembly 82 may be implemented by using the structure provided in the above embodiment, and the specific content may be referred to above, which is not described herein again. The motor assembly 82 is provided on the scrubber main body 81, and the cleaning device 83 is provided on the scrubber main body 81 to clean the object to be cleaned by the suction airflow. Further, the floor washing machine may further include: a handle, an extension pole, a waste water tank, a clean water tank, a display screen, etc., which are not particularly limited in this embodiment.

To sum up, the embodiment of the present invention provides a technical solution to reduce noise from several aspects as follows:

1. a plurality of cavities are formed outside the motor, such as the outer cavity, the inner cavity, the sound-proof cavity between the first casing and the second casing, and the like mentioned above, which can be added. The embodiment of the utility model provides an utilize a plurality of cavitys to carry out noise reduction treatment to low frequency and high frequency noise.

2. The noise source (namely the motor) is wrapped to the maximum extent through the micropore structure. The microporous structure is a plurality of air holes arranged on the air-permeable sound-insulating piece. The microporous structure can expose the route of swashing as little as possible, and the cavity between the ventilative sound insulating part of microporous structure and the first casing forms resonance sound absorbing structure simultaneously, can arouse the sound wave and bounce back many times in the cavity and consume the acoustic energy, reach the sound absorption purpose.

3. The air-permeable sound-insulating piece divides an inner cavity structure between the motor and the first shell into an inner cavity and an outer cavity, the outer cavity serving as an air outlet channel surrounding the periphery of the motor is provided with an air outlet, and the air outlet and an air inlet of the motor are positioned on the same side; therefore, after the air outlet airflow generated by the motor enters the air outlet channel through the breathable sound insulation piece, the air outlet and the air inlet are positioned at the same side, the air outlet airflow is arranged in the air outlet channel and wraps the periphery of the motor to form a wind wall, the noise of the motor is prevented from being spread outwards, and the noise is isolated in the wind wall; in addition, because of the air current disturbance around the outside of the motor in the air outlet channel, the frequency of the noise can be changed, and the purpose of noise reduction is achieved.

4. By the characteristic that the resonance frequencies of different materials are different, such as the materials of the air-permeable sound-insulating member and the first shell are different, and/or the materials of the first shell and the second shell are different; the vibration frequency change is generated in the process of transferring the vibration frequency by the air, thereby achieving the purpose of reducing noise.

5. A material with high acoustic resistance coefficient, namely a sound insulation material, is arranged between the first shell and the second shell, and a part of sound energy is converted into heat energy by utilizing the heat loss and viscous loss which are continuously generated when noise is transmitted in the porous material, so that the noise is reduced.

In order to facilitate understanding of the technical solutions of the present invention, specific application scenarios are given below to describe the technical solutions proposed by the present invention.

Application scenario one

The motor assembly described in the above embodiments can be used in a vacuum cleaner in which the motor assembly is operated to generate a suction airflow to create a negative pressure between the vacuum cleaner and the floor surface. The motor can generate machine frequency noise when working, and after the sucked air is discharged from the air outlet of the motor, the flow velocity of the sucked air is increased, so that great pneumatic noise can be generated. And the inside ventilative sound insulating barrier of motor element can slow down the velocity of flow of air current when not influencing the air current flow to subduct pneumatic noise. In addition, the inner cavity structure between the motor and the first shell is divided into an inner cavity and an outer cavity by the breathable sound insulation piece, the outer cavity serving as an air outlet channel surrounding the periphery of the motor is provided with an air outlet, and the air outlet and the air inlet of the motor are positioned on the same side; therefore, after the air outlet airflow generated by the motor enters the air outlet channel through the breathable sound insulation piece, the air outlet and the air inlet are positioned at the same side, the air outlet airflow is arranged in the air outlet channel and wraps the periphery of the motor to form a wind wall, the noise of the motor is prevented from being spread outwards, and the noise is isolated in the wind wall; in addition, because of the air current disturbance around the motor outside in the air-out passageway, still can make the frequency of noise change, the holistic noise of motor element is effectively subducted, and the user will obtain good use when using the dust catcher and experience.

Application scenario two

The motor assembly described in the above embodiments can be used in a floor washing machine which can not only clean dirt on the floor but also suck away dirty water or dirt on the floor when the floor washing machine is used for cleaning. The motor assembly operates to generate a suction airflow to provide the scrubber with the negative pressure required for cleaning and vacuuming. The air-permeable sound-insulating piece in the motor component divides an inner cavity structure between the motor and the first shell into an inner cavity and an outer cavity, the outer cavity serving as an air outlet channel surrounding the periphery of the motor is provided with an air outlet, and the air outlet and an air inlet of the motor are positioned on the same side; therefore, after the air outlet airflow generated by the motor enters the air outlet channel through the breathable sound insulation piece, the air outlet and the air inlet are positioned at the same side, the air outlet airflow is arranged in the air outlet channel and wraps the periphery of the motor to form a wind wall, the noise of the motor is prevented from being spread outwards, and the noise is isolated in the wind wall; in addition, because of the air current disturbance around the motor outside in the air-out passageway, still can make the frequency of noise change, the holistic noise of motor element is effectively subducted. Furthermore, a second shell is covered outside the first shell, and a sound insulation material is arranged between the first shell and the second shell so as to further reduce the machine frequency noise of the motor. When the user starts floor cleaning machine and cleans home ground, because of the noise is little, user use comfort is high, and can use when the family learns, has a rest.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An electric machine assembly, comprising:

a first housing;

the motor is positioned in the inner cavity;

2. The motor assembly of claim 1, wherein the air outlet is an annular air opening;

the annular tuyere ring is arranged on the outer side of the air inlet for a circle.

3. The electric machine assembly of claim 1, wherein the air permeable insulation comprises: a side wall surrounding an outer side of the motor;

a plurality of air holes are formed in the side wall;

the air outlet area of the air holes is larger than the air inlet area of the air inlet.

4. The electric machine assembly of claim 3, wherein the air permeable insulation further comprises: the annular wall plate extends from the outer side of the side wall to the direction far away from the side wall;

the annular wall plate is provided with the air outlet;

the air outlet area of the air outlet is larger than the air inlet area of the air inlet.

5. The electric machine assembly according to any of claims 1 to 4, wherein the air permeable insulation has two opposing first and second ends;

an elastic piece is arranged at the first end;

the elastic piece is provided with a through hole corresponding to the air inlet;

the motor is restrained at the first end by the resilient member.

6. The electric machine assembly of claim 5, wherein the first housing is spaced progressively farther from the air permeable insulation from the second end to the first end.

7. The electric machine assembly of any of claims 1 to 4, further comprising:

and the second shell is arranged on the outer side of the first shell so as to form a sound insulation cavity between the first shell and the second shell.

8. An electric motor assembly as set forth in claim 7 wherein a sound insulating material is disposed within said sound insulating cavity.

9. The motor assembly of claim 7, wherein the first housing and the second housing are of different materials; and/or

The first shell and the breathable sound insulation piece are made of different materials.

10. The electric motor assembly of claim 7, wherein the second housing comprises a front cover and a rear cover connected;

the rear cover is sleeved on the outer side of the first shell;

the front cover is provided with an air inlet channel communicated with the air inlet and an air outlet channel communicated with the air outlet;

the axis of the air inlet duct and the axis of the motor form an angle.

11. A cleaning apparatus, comprising:

an apparatus body;

a motor assembly as claimed in any one of claims 1 to 10, provided on the apparatus body for generating a suction air flow;

and a cleaning device provided on the apparatus body and cleaning the object to be cleaned by the suction airflow.

12. A floor scrubber, comprising:

a scrubber main body;

the motor assembly of any one of claims 1 to 10, disposed on the scrubber body for generating a suction airstream;

and a cleaning device which is arranged on the floor cleaning machine main body and cleans the cleaned object by utilizing the suction airflow.

13. A robot, comprising:

a robot body;

a motor assembly as claimed in any one of claims 1 to 10, provided on the robot body for generating a suction airflow.