CN218124478U - Sound-absorbing type composite motor fan cover, motor and high-pressure cleaning machine - Google Patents

Abstract

The utility model provides a sound-absorbing composite motor fan cover, a motor and a high-pressure cleaning machine, which comprises a first component and a second component; the first component is sleeved on the outer side of the motor pump unit, a first cavity is formed between the first component and the motor pump unit, the second component is sleeved on the outer side of the first component, and a second cavity is formed between the second component and the first component; the first component is provided with a plurality of silencing holes which are communicated with the first cavity and the second cavity; a plurality of grids are arranged between the second component and the first component; helmholtz resonant cavities are formed by matching the grating and the silencing holes. The utility model discloses a grid and bloop cooperation have formed the helmholtz resonant cavity, use under the cooperation of sound absorbing material, help the noise that motor pump unit produced to reflect, collide, resonate many times in the transmission process outside toward, and then consume the noise energy, help weakening motor pump unit's working noise, and then help reducing high pressure cleaner noise.

Description

Sound-absorbing type composite motor fan cover, motor and high-pressure cleaning machine

Technical Field

The utility model relates to a high pressure cleaner technical field specifically relates to a inhale compound motor fan housing of sound formula, motor and high pressure cleaner.

Background

With the development of high pressure cleaning technology, noise reduction is becoming a more and more demanding use for high pressure cleaning machines. At present, no good solution is provided for transmission and resonance noise generated when a noise source 'motor pump unit' of the high-pressure cleaning machine works. The existing noise reduction technology of the high-pressure cleaning machine is to reduce noise by using a soundproof cotton (silencing cotton) method inside a shell of the high-pressure cleaning machine, the soundproof cotton has the risks of loosening, falling and blocking a heat dissipation channel, and the soundproof cotton influences the area of the heat dissipation channel and further influences the temperature rise of a motor pump unit. When the motor is operated at a high speed, a small amount of sparks enter the heat dissipation channel, the material of the soundproof cotton is required to be high, the environment is not protected, and the fire hidden danger exists.

The traditional Chinese patent with the publication number of CN209680662U discloses a low-noise high-pressure cleaning machine complete machine, which comprises a machine body, wherein wheels are arranged at the bottom of the machine body, a handle is arranged at the top of the machine body, a winding disc assembly and a machine case are further arranged on the machine body, the winding disc assembly is positioned above the machine case and connected with the handle, a wind scooper, a motor, a buffering noise reduction device and a main pump are arranged in the machine case, the buffering noise reduction device is positioned on the outer side of the joint of the main pump and the motor, the wind scooper is positioned above the motor, the main pump is positioned at the bottom of the machine case, an oil cylinder is arranged in the main pump, and the oil cylinder is connected with the motor.

The inventor thinks that high pressure cleaner among the prior art only makes an uproar through soundproof cotton for the noise reduction effect of motor is poor, needs to provide a noise reduction effect good motor fan housing to reduce the noise of motor during operation.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at utilizing helmholtz resonant cavity principle, providing one kind and inhaleing compound motor fan housing of sound formula, motor and high pressure cleaner.

According to the utility model provides a sound-absorbing type composite motor fan cover, which comprises a first component and a second component; the first member is sleeved on the outer side of the motor pump unit, a first cavity is formed between the first member and the motor pump unit, the second member is sleeved on the outer side of the first member, and a second cavity is formed between the second member and the first member; the first component is provided with a plurality of silencing holes, and the silencing holes are communicated with the first cavity and the second cavity; a plurality of grids are arranged between the second component and the first component; and a Helmholtz resonant cavity is formed by matching the grating and the silencing hole.

Preferably, the second chamber is divided by the grid to form a plurality of second sub-chambers, and the second sub-chambers are filled with sound absorption materials.

Preferably, the shape of the first member matches the shape of the motor pump unit, and the motor pump unit is fixed inside the first member by a damping rubber ring.

Preferably, the shape of the first member is matched with that of the second member, the annular grids are arranged in parallel, and the second member is in abutting fit with the first member through the grids.

Preferably, the grille is securely attached to the inside of the second member.

Preferably, the grille is securely attached to the outside of the first member.

Preferably, the first member comprises a left motor fan housing and a right motor fan housing, and the left motor fan housing and the right motor fan housing are fixedly connected through screws.

Preferably, the second member comprises a left cover and a right cover, and the left cover and the right cover are fixedly connected through screws.

According to the utility model provides a pair of motor adopts foretell compound motor fan housing of sound formula of inhaling, still includes motor pump unit, inhale the compound motor fan housing cover of sound formula and establish the motor pump unit outside.

According to the utility model provides a pair of high pressure cleaner adopts foretell motor, the motor is installed inside high pressure cleaner.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a cooperation of a plurality of grids and a plurality of bloop has formed a plurality of helmholtz resonant cavities, uses under sound absorbing material's cooperation, and the noise that helps motor pump unit to produce reflects, collides, resonates many times in past transmission process outward, and then consumes noise energy, helps weakening the operating noise of motor pump unit, and then helps reducing high pressure cleaner noise.

2. The utility model discloses a motor fan housing is left to be assembled with the motor fan housing right side and is constituted first component, assembles through the left and right casing of casing and constitutes the second component, through adopting simple structure, helps improving the simplicity of assembly to help enlarging application scope.

3. The utility model discloses a be formed with first cavity between first component and the motor pump unit, be formed with the second cavity between second component and the first component, help increasing the process of marcing of the noise that motor pump unit produced to help reducing motor pump unit's operating noise.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a sectional view of the whole structure of the sound-absorbing type composite motor fan housing of the present invention;

fig. 2 is an exploded view of the overall structure of the sound-absorbing type composite motor fan housing according to the present invention;

fig. 3 is a schematic view of the overall structure of the sound-absorbing type composite motor fan housing according to the present invention;

fig. 4 is a schematic structural diagram of the present noise reduction technology of the motor pump unit of the present invention;

fig. 5 is a schematic view of the sound-absorbing type composite motor fan cover according to the present invention;

fig. 6 isbase:Sub>A cross-sectional view taken along sectionbase:Sub>A-base:Sub>A of fig. 5, illustrating the main embodiment of the present invention;

fig. 7 is a schematic structural view of a part I of fig. 6 according to the present invention;

fig. 8 is an exploded view of the overall structure of the first member of the present invention;

fig. 9 is an assembly diagram of the motor pump unit of the present invention;

fig. 10 is a schematic view of the second member according to the present invention.

Reference numerals:

first member 50 of second chamber 40 of motor pump unit 10

Second member 60 first chamber 70 motor fan housing left 501

Sound absorbing material 504 of sound absorbing hole 503 on right 502 of motor fan cover

Left 601 and right 602 grilles 603

Shell 2 soundproof cotton 3 heat dissipation channel 4

Second subchamber 401 of damping rubber ring 80 screw 90

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, the sound-absorbing composite motor fan housing according to the present invention includes a first member 50 and a second member 60; the first component 50 is sleeved on the outer side of the motor pump unit 10, a first cavity 70 is formed between the first component 50 and the motor pump unit 10, the second component 60 is sleeved on the outer side of the first component 50, and a second cavity 40 is formed between the second component 60 and the first component 50; the first member 50 is provided with a plurality of silencing holes 503, and the silencing holes 503 are communicated with the first chamber 70 and the second chamber 40; a plurality of grids 603 are provided between the second member 60 and the first member 50, and helmholtz resonance chambers are formed by the grids 603 and the muffling holes 503.

With the development of high pressure cleaning technology, noise reduction is becoming a more and more demanding use for high pressure cleaning machines. At present, there is not good solution to transmission, the resonance noise that the noise source "motor pump unit 10" of high pressure cleaner sent when working, and the helmholtz resonance chamber is the most basic acoustic structure, has the wide application in the noise elimination field, can utilize the theory of operation of this structure, solves high pressure cleaner's noise problem.

As shown in fig. 4, no noise reduction measure is taken in the existing high-pressure cleaning machine on the market, even if there is a noise reduction measure, it is only inside the casing of the high-pressure cleaning machine to take the mode of filling soundproof cotton to reduce noise, soundproof cotton 3 is used inside the casing 2 of the motor pump unit 10, soundproof cotton 3 is distributed inside or outside the heat dissipation channel 4 of the motor pump unit 10, the noise is absorbed and shielded through soundproof cotton 3, soundproof cotton 3 is usually pasted and fixed inside the casing 2 by a pressing plate, there is a risk of loosing, dropping and blocking the heat dissipation channel 4, the thickness tolerance of soundproof cotton 3 is more than ± 0.5mm, the area of the heat dissipation air channel is affected, and further the temperature rise of the motor pump unit 10 is affected. When the motor is in high-speed operation, a small amount of sparks enter the heat dissipation channel 4, the material of the soundproof cotton 3 has high requirements, the motor is not environment-friendly, and the hidden danger of firing exists.

The Helmholtz resonant cavity used in the application is a typical noise elimination structure, and the technical principle of the structure can be utilized to effectively solve the noise problem of the motor pump unit 10, so that the noise of the high-pressure cleaning machine is reduced.

As shown in fig. 5 to 7, a first chamber 70 is formed between the first member 50 and the motor pump unit 10, the first chamber 70 being a resonance chamber, a second chamber 40 is formed between the second member 60 and the first member 50, and the second chamber 40 being an expansion chamber. The grill 603 is provided inside the second member 60, and a plurality of annular grills 603 are provided in parallel and perpendicular to the central axis of the motor pump unit 10. The second member 60 is in abutting fit with the first member 50 through the grid 603, the second chamber 40 is divided by the grid 603 to form a plurality of second sub-chambers 401, and the interior of the second sub-chambers 401 is filled with sound-absorbing materials 504. The annular side wall of first chamber 70 is provided with a plurality of bloop holes 503, and grid 603 and the cooperation of bloop hole 503 make second subchamber 401 form the helmholtz resonance chamber, and a plurality of helmholtz resonance chambers are filled with sound absorbing material 504, and motor pump unit 10 is in the past transmission in-process of the noise that produces at the during operation, through reflection, collision many times, alleviate vibration, and noise energy is consumed to reduce the operating noise of motor pump.

As shown in fig. 8 and 9, the shape of the first member 50 is matched to the shape of the motor pump unit 10, and the motor pump unit 10 is fixed inside the first member 50 by a damper rubber ring 80. The first member 50 wraps the motor pump unit 10, so that the volume of the motor pump unit 10 is increased as little as possible while the first chamber 70 is reserved, and the volume proportion of the motor pump unit 10 in the whole high-pressure cleaning machine is not influenced.

The muffling holes 503 are uniformly distributed on the first member 50, so that the muffling holes 503 are distributed over the periphery of the motor pump unit 10, and it is ensured that noise generated during operation of the motor pump unit 10 can sufficiently enter the helmholtz resonant cavity to be muffled.

The first member 50 includes a motor fan housing left 501 and a motor fan housing right 502, and the motor fan housing left 501 and the motor fan housing right 502 are fastened and connected by a screw 90. The joint of the outer sides of the left 501 and the right 502 of the motor fan housing is provided with a plurality of mounting rings which are fixedly connected through screws 90, so that the left 501 and the right 502 of the motor fan housing are tightly connected, and no gap is left at the joint. Preferably, the height of the mounting ring does not exceed the height of the grating 603, and does not affect the Helmholtz resonator operation.

As shown in fig. 10, the second member 60 includes a case left 601 and a case right 602, and the case left 601 and the case right 602 are fastened by screws 90. The junction in the left 601 and the right 602 outside of housing is provided with a plurality of collars, through screw 90 fixed connection collar for housing left 601 and housing right 602 fastening connection, and the junction does not leave the gap, simple structure, and the installation is easy.

The left motor fan cover 501, the right motor fan cover 502, the left housing 601 and the right housing 602 are all made of plastic materials, such as PP and ABS. In other embodiments, the connection between the motor fan housing left 501 and the motor fan housing right 502 may be implemented by other means, such as a snap connection. Likewise, the connection of the left housing 601 and the right housing 602 can be achieved in other ways.

The joint of the motor fan housing left 501 and the motor fan housing right 502, the joint of the housing left 601 and the housing right 602, and the central axis of the motor pump unit 10 are located on the same plane.

When the motor pump unit is used, firstly, the motor pump unit 10 is wrapped by the motor fan housing left 501 and the motor fan housing right 502, then the motor pump unit is tightly connected through the mounting ring, then the sound-absorbing material 504 is wrapped, finally, the motor fan housing left 501 and the motor fan housing right 502 are wrapped by the housing left 601 and the housing right 602, and at the moment, the silencing holes 503 are all covered by the housing left 601 and the housing right 602 of the second member 60.

This application has formed a plurality of helmholtz resonant cavities through adopting a plurality of grids 603 and a plurality of bloop hole 503 cooperation, and under sound absorbing material 504's cooperation was used, motor pump unit 10 was in the noise that produces at the during operation past outer transmission in-process, through reflection, collision many times, alleviate the vibration, and noise energy is consumed to the effectual operating noise that has reduced the motor pump. Furthermore, the noise reduction device is simple in structure, easy to assemble, good in noise reduction effect and capable of effectively expanding the application range.

Examples of variations

In embodiment 1, the grill 603 may be provided outside the first member 50, and the position of the grill 603 is not affected. A plurality of grids 603 and a plurality of bloop holes 503 have formed a plurality of helmholtz resonator cavities, and a plurality of helmholtz resonator cavities are filled with sound absorbing material 504, and motor pump unit 10 is in the noise that produces at the during operation in outside transmission process, through reflection, collision many times, alleviate vibration, and noise energy is consumed to reduce the operating noise of motor pump.

Example 2

According to the utility model provides a pair of motor adopts embodiment 1 inhale the compound motor fan housing of sound formula, still include motor pump unit 10, inhale the compound motor fan housing cover of sound formula and establish in the 10 outsides of motor pump unit. Utilize the noise-abatement structure of helmholtz resonant cavity this kind, design into the motor fan housing, use at the motor pump unit, combine to use sound-absorbing material 504 to fall and make an uproar to realize dual measures of making an uproar that fall, make the noise that sound-absorbing formula composite motor fan housing can effectual reduction motor during operation sent, thereby effectively enlarge the application scope of motor.

Example 3

According to the utility model provides a pair of high pressure cleaner adopts embodiment 2 the motor, the motor is installed inside high pressure cleaner, because the noise greatly reduced of motor work for high pressure cleaner noise reduction, thereby reduced noise pollution, effectively enlarged high pressure cleaner's application scope.

Principle of operation

A first chamber 70 is formed between the first member 50 and the motor pump unit 10, the first chamber 70 being a resonant cavity, a second chamber 40 is formed between the second member 60 and the first member 50, the second chamber 40 being an expansion cavity. A plurality of grills 603 are provided between the second member 60 and the first member 50, a plurality of muffling holes 503 are provided in the first member 50, and a sound absorbing material 504 is provided inside the second chamber 40. A plurality of grids 603 and a plurality of bloop holes 503 have formed a plurality of helmholtz resonator cavities, and a plurality of helmholtz resonator cavities are filled with sound absorbing material 504, and motor pump unit 10 is in the noise that produces at the during operation in outside transmission process, through reflection, collision many times, alleviate vibration, and noise energy is consumed to reduce the operating noise of motor pump.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A sound-absorbing composite motor fan cover is characterized by comprising a first component (50) and a second component (60);

the first component (50) is sleeved on the outer side of the motor pump unit (10), a first cavity (70) is formed between the first component (50) and the motor pump unit (10), the second component (60) is sleeved on the outer side of the first component (50), and a second cavity (40) is formed between the second component (60) and the first component (50);

a plurality of silencing holes (503) are formed in the first member (50), and the silencing holes (503) are communicated with the first chamber (70) and the second chamber (40);

a plurality of grids (603) are arranged between the second member (60) and the first member (50);

helmholtz resonance cavities are formed by matching the grating (603) and the silencing hole (503).

2. The sound-absorbing composite motor wind shield according to claim 1, wherein the second chamber (40) is partitioned by the grid (603) to form a plurality of second sub-chambers (401), and the interior of the second sub-chambers (401) is filled with a sound-absorbing material (504).

3. The sound-absorbing composite motor wind shield according to claim 1, characterized in that the shape of the first member (50) matches the shape of the motor pump unit (10), the motor pump unit (10) being fixed inside the first member (50) by means of a damping rubber ring (80).

4. The sound-absorbing composite motor fan cover according to claim 1, wherein the first member (50) has a shape matching the shape of the second member (60), a plurality of annular grilles (603) are arranged in parallel, and the second member (60) is in abutting engagement with the first member (50) through the grilles (603).

5. The sound-absorbing composite motor wind shield according to claim 1, wherein the grille (603) is fixedly attached to an inner side of the second member (60).

6. The sound absorbing composite motor wind shield according to claim 1, wherein the grille (603) is fastened to an outer side of the first member (50).

7. The sound-absorbing composite motor fan cover according to claim 1, wherein the first member (50) comprises a motor fan cover left (501) and a motor fan cover right (502), and the motor fan cover left (501) and the motor fan cover right (502) are fixedly connected by a screw (90).

8. The sound-absorbing composite motor wind shield according to claim 1, wherein the second member (60) comprises a left housing (601) and a right housing (602), and the left housing (601) and the right housing (602) are fastened by screws (90).

9. An electric motor employing the sound-absorbing composite motor fan cover according to any one of claims 1 to 8, further comprising the motor pump unit (10), wherein the sound-absorbing composite motor fan cover is fitted over an outer side of the motor pump unit (10).

10. A high-pressure washer, using an electric machine as claimed in claim 9, characterized in that the electric machine is mounted inside the high-pressure washer.

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