CN112168092A

CN112168092A - Air suction motor assembly and cleaning equipment

Info

Publication number: CN112168092A
Application number: CN202011017315.9A
Authority: CN
Inventors: 曹赛先
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-01-05

Abstract

The invention discloses an air suction motor assembly and cleaning equipment, and belongs to the technical field of cleaning machines. The air suction motor assembly provided by the invention comprises a sound attenuation box and a motor, wherein the sound attenuation box is provided with an accommodating cavity, the motor is positioned in the accommodating cavity, one axial end of the motor is provided with an air suction joint extending out of the sound attenuation box, one radial end of the motor is provided with an air outlet joint extending out of the sound attenuation box, the other axial end of the sound attenuation box, which is positioned in the motor, is provided with a vent hole, and the inner diameter of the vent hole is larger than the outer diameter of. This induced draft motor element during operation, the air can get into the casing of motor from the middle part in ventilation hole to follow the casing and flow into the circumference clearance discharge between motor and the ventilation hole behind the space between whistle box and the motor, so make the air inlet and the air-out of motor form the convection current, not only can the noise reduction, and can improve the radiating effect. The cleaning equipment provided by the invention comprises the air suction motor assembly, the noise generated during the operation is small, and the use experience of a user is high.

Description

Air suction motor assembly and cleaning equipment

Technical Field

The invention relates to the technical field of cleaning machines, in particular to an air suction motor assembly and cleaning equipment.

Background

With the gradual improvement of people's lives, cleaning equipment represented by cleaning robots is more and more commonly found in people's daily lives, such as private residential spaces and public spaces with large people flow, such as schools, hospitals and stations. When the cleaning robot performs cleaning operation, cleaning water needs to be sprayed to the ground to absorb dirt, and the sewage absorbed with the dirt is sucked back to the sewage tank of the cleaning equipment by the motor, so that the cleaning of the ground is ensured, and the quick drying can be realized.

However, the noise generated by the motor in the working process is large, and the decibel value is even as high as 80.5dB, so that the comfort of people is seriously reduced, and the life and the work of people are greatly influenced. How to provide a low-noise motor and cleaning equipment is a technical problem which needs to be solved urgently.

Disclosure of Invention

One object of the present invention is to provide an air suction motor assembly, which generates less noise during operation, and is beneficial to improving the user experience.

In order to achieve the purpose, the invention adopts the following technical scheme:

an air suction motor assembly comprising:

the silencing box is provided with an accommodating cavity;

the motor is positioned in the accommodating cavity, an air suction joint extending out of the sound muffling box is arranged at one axial end of the motor, an air outlet joint extending out of the sound muffling box is arranged at one radial end of the motor, a vent hole is formed at the other axial end of the sound muffling box, and the inner diameter of the vent hole is larger than the outer diameter of the other axial end of the motor;

air can enter the shell of the motor from the middle of the vent hole, and is discharged from a circumferential gap between the motor and the vent hole after flowing into a space between the sound muffling box and the motor from the shell.

Preferably, the inner wall of the sound-deadening box is provided with a first sound-deadening structure.

Preferably, the other axial end of the motor is provided with an air duct, and the air duct extends out of the vent hole and has a gap with the vent hole.

Preferably, one axial end of the motor is mounted on the sound muffling box, and a shock absorption pad is arranged between the one axial end of the motor and the inner wall of the sound muffling box.

Another object of the present invention is to provide a cleaning device, which generates less noise during operation, and is beneficial to improve the user experience.

a cleaning device comprises a frame, a water suction rake, a sewage tank, an air inlet pipe, an air outlet pipe assembly and the air suction motor assembly, wherein the water suction rake, the sewage tank, the air inlet pipe, the air outlet pipe assembly and the air suction motor assembly are arranged on the frame;

one end of the air inlet pipe is connected with the air suction joint, and the other end of the air inlet pipe is connected with the sewage tank so as to generate negative pressure in the sewage tank;

the sewage tank is connected with the water sucking rake through a water sucking pipe, and sewage in the water sucking rake is sucked into the sewage tank under the action of negative pressure;

one end of the air outlet pipe assembly is connected with the air outlet connector, and the other end of the air outlet pipe assembly blows out outwards.

Preferably, the air outlet pipe assembly comprises a silencing hose and a silencing tail throat which are communicated with each other, and one end, far away from the silencing tail throat, of the silencing hose is connected with the air outlet connector.

Preferably, the silencing hose comprises an outer wall, an inner wall and a second silencing structure, the second silencing structure is located between the outer wall and the inner wall, the outer wall is made of flexible materials, and the inner wall is a spiral support body made of hard materials.

Preferably, be provided with the ladder face in the lumen of amortization tail larynx, the one end of amortization hose stretches into in the amortization tail larynx, and end to be in on the ladder face, the internal diameter of screw support body with the internal diameter of the lumen of amortization tail larynx equals.

Preferably, one end of the silencing tail throat, which is far away from the silencing hose, is provided with a bent part.

Preferably, the other end of the air outlet pipe assembly blows towards the ground.

The invention has the beneficial effects that:

the invention provides an air suction motor assembly which comprises a sound attenuation box and a motor, wherein the sound attenuation box is provided with an accommodating cavity, the motor is positioned in the accommodating cavity, one axial end of the motor is provided with an air suction joint extending out of the sound attenuation box, one radial end of the motor is provided with an air outlet joint extending out of the sound attenuation box, the other axial end of the sound attenuation box is provided with an air vent, and the inner diameter of the air vent is larger than the outer diameter of the other axial end of the motor. This induced draft motor element during operation, the air can get into the casing of motor from the middle part in ventilation hole to follow the casing and flow into the circumference clearance discharge between motor and the ventilation hole behind the space between whistle box and the motor, so make the air inlet and the air-out of motor form the convection current, not only can the noise reduction, and can improve the radiating effect.

Drawings

FIG. 1 is a schematic view of a cleaning apparatus provided by the present invention;

FIG. 2 is an assembly view of the sound muffling box and the motor provided by the present invention;

FIG. 3 is a cross-sectional view of the sound muffling box and the motor provided by the present invention;

fig. 4 is a cross-sectional view of a noise-damping hose provided by the present invention.

In the figure:

1. a motor; 11. an air suction joint; 12. an air outlet joint;

2. a sound silencing box; 21. a rear housing; 22. a front housing; 23. a vent hole; 24. a first sound attenuating structure;

3. a shock pad; 4. a frame; 5. water absorption raking; 6. a sewage tank; 7. an air inlet pipe;

8. an air outlet pipe assembly; 81. a silencing hose; 811. an outer wall; 812. a second sound attenuating structure; 813. an inner wall; 82. silencing tail throat;

9. a suction pipe; 10. an air duct.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a cleaning device, and the cleaning device is high in automation degree, can be used in places such as offices, stations, schools and hospitals, and can automatically clean the ground of each place, so that the labor intensity of cleaning personnel is reduced, and the cleaning effect and the cleaning efficiency are improved.

As shown in fig. 1, the cleaning device comprises a frame 4, a suction rake 5, a sewage tank 6, an air inlet pipe 7, a suction pipe 9, an air outlet pipe assembly 8 and a suction motor assembly. Wherein, the frame 4 is a supporting and mounting part of the whole cleaning equipment, and the water suction rake 5, the sewage tank 6, the air inlet pipe 7, the water suction pipe 9, the air outlet pipe assembly 8 and the air suction motor assembly are all mounted on the frame 4. Optionally, the frame 4 is a frame structure formed by splicing plates and pipes, and the plates, the plates and the pipes, and the pipes can be directly welded or connected by using connecting pieces. Further alternatively, the frame 4 is made of a light and strong material.

The sewage tank 6 is provided at the top of the frame 4, and is used for recovering sewage generated after cleaning the floor. In this embodiment, the waste water tank 6 has a cubic shape having a chamber therein for containing waste water. The water absorption scratcher 5 is arranged at the bottom of the frame 4 and can be contacted with the ground to absorb sewage on the ground. The specific structure of the water absorption scrabbling 5 is the prior art and is not described herein. The suction rake 5 and the sewage tank 6 are connected through a suction pipe 9, and optionally, the suction pipe 9 is a hose to reduce the installation difficulty and facilitate fixing on the frame 4.

The air suction motor component is arranged in the middle of the frame 4 and is communicated with the sewage tank 6 through the air inlet pipe 7, and negative pressure can be generated in the sewage tank 6 by utilizing the air suction motor component, so that sewage on the ground can sequentially pass through the water suction rake 5 and the water suction pipe 9 to enter the sewage tank 6. Specifically, as shown in fig. 2 and 3, the suction motor assembly includes a sound muffling box 2 and a motor 1. The sound-muffling box 2 is a box body in a cubic shape, a containing cavity is arranged in the sound-muffling box 2, and the motor 1 is arranged in the containing cavity. Optionally, in order to facilitate the motor 1 to be disposed in the sound muffling box 2, in this embodiment, the sound muffling box 2 includes a front shell 22 and a rear shell 21, the front shell 22 and the rear shell 21 are both in a cube shape, an avoiding hole is formed in the front portion of the front shell 22, a vent hole 23 is formed in the rear portion of the rear shell 21, and the front shell 22 and the rear shell 21 are spliced together in the front and rear direction to form a housing of the sound muffling box 2. Alternatively, two fixing holes are provided above the front case 22, and a connector passes through the fixing holes to fix the front case 22 to the frame 4. The side of the rear shell 21 is provided with two mounting holes, and the connecting member passes through the mounting holes and is fixed on the front shell 22, thereby realizing the assembly of the front shell 22 and the rear shell 21.

Further optionally, in order to reduce noise generated during operation of the motor 1, a first sound deadening structure 24 is provided on an inner wall of the sound deadening box 2. Optionally, the first sound-deadening structure 24 is made of sound-deadening cotton, for example, a wavy rubber-plastic cotton composite polyester sponge or 20mm rubber-plastic sound-deadening cotton, which is low in cost, easy to obtain and good in sound-deadening effect. Of course, other structures or substances capable of providing a sound-deadening effect than the sound-deadening cotton are also applicable as the first sound-deadening structure 24.

The motor 1 is arranged in the sound muffling box 2 and is relatively fixed with the front shell 22 through a flange positioned in the front shell 22. The motor 1 has two end parts along the axial direction, wherein an air suction joint 11 extending out of the avoidance hole is arranged on the end part positioned in the front shell 22, an air suction opening is arranged on the air suction joint 11, the air suction opening is connected with one end of an air inlet pipe 7, and the other end of the air inlet pipe 7 is connected with the sewage tank 6. Optionally, suction connection 11 is connected to air inlet duct 7 by a hose clamp. Further optionally, the air inlet duct 7 is provided with a hose for ease of assembly and deployment.

The other end portion of the motor 1, on which the fan is provided, is located inside the rear case 21, and is disposed opposite to the ventilation hole 23, and the ventilation hole 23 has an inner diameter larger than an outer diameter of the end portion, so that a circumferential gap in an annular shape is formed between the end portion and the ventilation hole 23. Alternatively, the vent hole 23 is a circular hole, and the diameter of the vent hole 23 is 30mm larger than the diameter of the other end portion of the motor 1. Of course, in other embodiments, the size may be adjusted as desired. Furthermore, the other end of the motor 1 is also sleeved with an air duct 10, the air duct 10 extends out of the vent hole 23, a gap is formed between the air duct 10 and the vent hole 23, and the air duct 10 can play a role in guiding air to flow. An air outlet joint 12 extending out of the sound muffling box 2 is further arranged along the radial direction of the motor 1, and the air outlet joint 12 is communicated with the air outlet pipe assembly 8 to realize air outlet and dry the ground.

The motor 1 is cylindrical as a whole and is arranged in a cubic containing cavity in the sound muffling box 2, so that sufficient space is reserved at four corners inside the sound muffling box 2. When the motor 1 works, the fan is started, air can enter the shell of the motor 1 from the middle of the vent hole 23, so that heat dissipation of internal components of the motor 1 is realized, the air after heat dissipation can flow into a space between the sound attenuation box 2 and the motor 1, and flows out from a circumferential gap between the other end of the motor 1 and the vent hole 23. The air can reach a convection heat dissipation's effect in motor 1 inside, not only can improve the radiating effect, and can reduce the noise that produces in the motor 1 working process.

In order to reduce the vibration amplitude of the motor 1 in the working process and further reduce the noise generated in the working process of the motor 1, a damping pad 3 is further arranged between the motor 1 and the sound muffling box 2, specifically, one axial end of the motor 1 is arranged on the sound muffling box 2, and the damping pad 3 is arranged between one axial end of the motor 1 and the inner wall of the sound muffling box 2. Alternatively, the damper pad 3 is a rubber pad made of rubber, and the rubber pad is disposed between the front shell 22 and the flange of the sound muffling box 2. Of course, other materials capable of providing a shock absorbing effect, other than the rubber pad, are also suitable for the cushion 3.

Get into the inside air of motor 1 and become hot-air after the heat exchange, in order to utilize this part hot-air to carry out the drying to the ground after the cleanness, the air-out that connects 12 departments at motor 1 still is connected with air-out pipe assembly 8, and air-out pipe assembly 8 keeps away from the one end that the air-out connects 12 and blows to ground to the subaerial remaining water stain of drying. Specifically, as shown in fig. 1 and 4, the air outlet pipe assembly 8 includes a silencing hose 81 and a silencing tail pipe 82 which are communicated with each other, one end of the silencing hose 81 is connected with the air outlet connector 12, the other end of the silencing hose is connected with the silencing tail pipe 82, and an outlet end of the silencing tail pipe 82 faces the ground.

Alternatively, to enhance the noise reduction effect, as shown in fig. 4, the silencing hose 81 includes an outer wall 811, a second silencing structure 812 and an inner wall 813. The outer wall 811 is a tubular structure made of flexible material, and may be made of PVC film, and in this embodiment, the outer wall 811 is a circular tube. The inner wall 813 is a tubular structure made of hard materials, and specifically can be a spiral support made of hard materials. Optionally, the spiral support body is a wire spring, and the wire spring has good support performance and does not influence the flow of air. Second sound attenuating structure 812 is disposed between outer wall 811 and inner wall 813. Optionally, the second sound-deadening structure 812 is sound-deadening cotton, for example, a wavy rubber-plastic cotton composite polyester sponge or 20mm rubber-plastic sound-deadening cotton may be used, and the sound-deadening cotton is low in cost, easy to obtain and good in sound-deadening effect.

In order to realize the connection of the silencing hose 81 and the silencing tail throat 82 and avoid the change of the pipe diameter at the interface to generate pneumatic noise, the silencing hose 81 is inserted into the silencing tail throat 82, and the inner diameters of the silencing hose 81 and the silencing tail throat 82 are equal. Specifically, the silencing tail 82 is a tubular structure, a stepped surface is provided on the inner wall surface of the lumen thereof, the end of the silencing hose 81 abuts against the stepped surface, and the inner diameter of the spiral support body is set to be equal to the inner diameter of the lumen of the silencing tail 82. The specific value of the inner diameter is not limited herein, and is set specifically according to the circumstances.

In order to further reduce the noise generated by the air flowing through the outlet duct assembly 8, a bent portion is provided at one end of the silencing tail throat 82 away from the silencing hose 81. According to simulation analysis, compared with the branch pipe-shaped silencing tail throat 82, the silencing tail throat 82 with the bending part can reduce the overall acoustic energy level of the air suction motor assembly from 55dB to 39.5dB, and the change rate is as high as 28.7%.

This cleaning device not only has reduced the noise that produces in the working process to a great extent through adopting foretell motor element that induced drafts, and noise at work can be reduced 68dB-70dB by 80.5dB to improved user's use and experienced, and can draw forth the hot-blast direct blow to ground that produces in the 1 working process of motor, thereby make ground rapid drying, solved cleaning device and washd the difficult dry problem of ground wet and slippery after the ground, can guarantee pedestrian's walking safety.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An air suction motor assembly, comprising:

the silencing box (2) is provided with an accommodating cavity;

the motor (1) is located in the accommodating cavity, an air suction joint (11) extending out of the sound muffling box (2) is arranged at one axial end of the motor (1), an air outlet joint (12) extending out of the sound muffling box (2) is arranged at one radial end of the motor (1), a vent hole (23) is formed in the other axial end of the sound muffling box (2) located at the motor (1), and the inner diameter of the vent hole (23) is larger than the outer diameter of the other axial end of the motor (1);

air can enter the shell of the motor (1) from the middle part of the vent hole (23), and is discharged from a circumferential gap between the motor (1) and the vent hole (23) after flowing into a space between the sound muffling box (2) and the motor (1) from the shell.

2. The suction motor assembly of claim 1,

the inner wall of the sound attenuation box (2) is provided with a first sound attenuation structure (24).

3. The suction motor assembly of claim 1,

an air duct (10) is arranged at the other axial end of the motor (1), and the air duct (10) extends out of the vent hole (23) and has a gap with the vent hole (23).

4. The suction motor assembly of claim 1,

the motor is characterized in that one axial end of the motor (1) is arranged on the sound muffling box (2), and a shock pad (3) is arranged between one axial end of the motor (1) and the inner wall of the sound muffling box (2).

5. A cleaning device, characterized by comprising a frame (4), a water suction rake (5) arranged on the frame (4), a sewage tank (6), an air inlet pipe (7), an air outlet pipe component (8) and a suction motor component according to any one of claims 1-4;

one end of the air inlet pipe (7) is connected with the air suction joint (11), and the other end of the air inlet pipe is connected with the sewage tank (6) so as to generate negative pressure in the sewage tank (6);

the sewage tank (6) is connected with the water sucking rakes (5) through water sucking pipes (9), and sewage in the water sucking rakes (5) is sucked into the sewage tank (6) under the action of negative pressure;

one end of the air outlet pipe assembly (8) is connected with the air outlet connector (12), and the other end of the air outlet pipe assembly blows out outwards.

6. The cleaning apparatus of claim 5,

air-out pipe assembly (8) are including amortization hose (81) and amortization tail larynx (82) of intercommunication each other, amortization hose (81) are kept away from the one end of amortization tail larynx (82) with air-out connects (12) and connects.

7. The cleaning apparatus of claim 6,

the silencing hose (81) comprises an outer wall (811), an inner wall (813) and a second silencing structure (812), wherein the second silencing structure (812) is located between the outer wall (811) and the inner wall (813), the outer wall (811) is made of flexible materials, and the inner wall (813) is a spiral support body made of hard materials.

8. The cleaning apparatus defined in claim 7,

the intracavity of amortization tail larynx (82) is provided with the ladder face, the one end of amortization hose (81) stretches into in amortization tail larynx (82), and end to be in on the ladder face, the internal diameter of screw support body with the internal diameter of the lumen of amortization tail larynx (82) equals.

9. The cleaning apparatus of claim 6,

one end, far away from the silencing hose (81), of the silencing tail throat (82) is provided with a bending part.

10. The cleaning apparatus of claim 5,

the other end of the air outlet pipe assembly (8) blows towards the ground.