CN219139691U - Muffler for air spring, air spring and vehicle - Google Patents

Abstract

The utility model relates to a muffler for an air spring, an air spring and a vehicle. The muffler for an air spring includes: a housing having a circumferential wall enclosing a hollow chamber; a connection pipe inserted into the chamber and having a sound-deadening section on which a plurality of sound-deadening holes spaced apart from each other are provided and a connection section connected to the sound-deadening section and adapted to communicate with an exhaust pipe of the air spring; and a sound deadening interlayer disposed in the chamber between the circumferential wall and the sound deadening section, and separating a predetermined flow passage communicating with the external environment between the sound deadening interlayer and the sound deadening section. The silencer provided by the utility model can reduce noise of the air discharged by the air spring, and effectively improves the use experience of a user.

Description

Muffler for air spring, air spring and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a muffler for an air spring, the air spring and a vehicle.

Background

The air suspension is a device which is arranged between the frame and the wheels and used for adjusting the height of the vehicle and improving the stability of the vehicle. The arrangement of the air suspension can effectively improve the running smoothness of the vehicle and improve the safety and the comfort of riding passengers. The air suspension can also automatically adjust and maintain the vehicle height unchanged when the vehicle load changes. Meanwhile, the air suspension can reduce the damage of vibration to electric appliances, instruments, vehicle bodies, chassis and other accessories, and the maintenance cost of the vehicle is reduced.

The air suspension consists of an air spring, a corresponding air compressor, an exhaust valve and the like. The air compressor forms compressed air and delivers the compressed air into an air chamber of an air spring that expands to raise the height of the vehicle. By controlling the exhaust valve to exhaust the high pressure gas in the air chamber of the air spring, the air spring is shortened to reduce the height of the vehicle.

However, during the process of exhausting high pressure gas to reduce the height of the vehicle, a "pyroll" exhaust sound is often generated, thereby causing customer complaints about vehicle performance. A muffler mounted at the end of an air spring exhaust pipe for reducing exhaust sound has been developed in the prior art. The muffler for an air spring generally uses a cavity structure, and noise reduction is achieved by amplifying expansion of a high pressure gas in the cavity and resonance of sound waves in the cavity. However, the arrangement of the cavity structure can only reduce noise of part of exhaust gas entering the cavity, and the noise reduction efficiency is low.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of Invention

The utility model provides a silencer for an air spring, which aims to solve the technical problem that the silencer for the air spring in the prior art is low in noise reduction efficiency. The muffler for an air spring includes: a housing having a circumferential wall enclosing a hollow chamber; a connection pipe inserted into the chamber and having a sound-deadening section on which a plurality of sound-deadening holes spaced apart from each other are provided and a connection section connected to the sound-deadening section and adapted to communicate with an exhaust pipe of the air spring; and a sound deadening interlayer disposed in the chamber between the circumferential wall and the sound deadening section, and separating a predetermined flow passage communicating with the external environment between the sound deadening interlayer and the sound deadening section.

The silencer for the air spring comprises a shell, a connecting pipe and a silencing interlayer. The housing has a circumferential wall enclosing a hollow chamber. The formation of the chamber may provide accommodation for other components, such as sound attenuating interlayers and the like. The connecting pipe is inserted into the chamber and has a sound deadening segment and a connecting segment that is connected to the sound deadening segment and is adapted to communicate with the exhaust pipe of the air spring. The arrangement of the connecting section can facilitate the installation of the muffler on the exhaust pipe of the air spring. A plurality of silencing holes are formed in the silencing section at intervals, so that the flow speed of high-pressure gas discharged from the exhaust pipe is reduced when the high-pressure gas flows through the silencing holes, and the first noise reduction is achieved. The sound-deadening interlayer is arranged in the chamber and between the circumferential wall and the sound-deadening section, so that sound waves flowing out from the sound-deadening hole are converted into heat energy dissipation when passing through the sound-deadening interlayer, and the second noise reduction is realized. In addition, a preset flow passage communicated with the external environment is arranged between the silencing interlayer and the silencing section. The arrangement of the predetermined flow passage can facilitate the discharge of the high-pressure gas, so that the high-pressure gas is smoothly discharged to the external environment along the predetermined flow passage.

In the above preferred embodiment of the muffler for an air spring, the housing further includes: a bottom wall closed and located at a first end of the circumferential wall; and an exhaust port located at a second end of the circumferential wall opposite the first end, and through which the predetermined flow passage communicates with the external environment. The bottom wall is arranged, so that the travel of the air flow from the silencing hole close to the bottom wall to the external environment can be prolonged, and the silencing effect is improved. The arrangement of the exhaust port can facilitate the installation of other components (such as a silencing interlayer and the like), and can smoothly discharge the gas from the exhaust port to the external environment after flowing through a preset flow passage.

In the above preferred technical solution of the muffler for an air spring, the muffler further includes: a support bracket having a bracket body inserted into the chamber to support the sound deadening interlayer, and spacing the predetermined flow passage between the bracket body and the sound deadening section. The setting of support bracket not only is convenient for the installation of amortization intermediate layer fixed, can conveniently interval out predetermined runner between support body and amortization section again.

In the preferred embodiment of the muffler for an air spring described above, the bracket body, the muffler section, the muffler interlayer, and the circumferential wall have central axes that coincide with each other. Through foretell setting, can effectively improve the homogeneity and the effect of making an uproar falls in the muffler, can also make the muffler have relatively regular structure simultaneously, the installation of being convenient for is fixed.

In the preferred embodiment of the muffler for an air spring described above, the bracket body includes a plurality of axial ribs surrounding the central axis and a plurality of circumferential ribs spaced apart along the central axis. Through foretell setting, can make the support body have the structure of fretwork, the sound wave of being convenient for passes the support body and gets into amortization intermediate layer and carry out secondary amortization.

In the preferred aspect of the muffler for an air spring described above, the support bracket further includes an annular wall extending radially outward from an end of the bracket body, and a predetermined gap is spaced between the annular wall and the circumferential wall. The arrangement of the annular wall can facilitate the installation of the support bracket. In addition, the predetermined gap is arranged so that the gas can be discharged to the external environment from the predetermined gap after flowing through the predetermined flow passage.

In the preferred embodiment of the muffler for an air spring described above, the muffler section has an inner cavity extending along a central axis thereof, and a total area of all the muffler holes is larger than an area of a cross section of the inner cavity perpendicular to the central axis. Through the arrangement, the silencer can be provided with the silencing holes with larger total area, so that good noise reduction effect is achieved.

In the preferred technical scheme of the silencer for the air spring, the diameter of each silencing hole is 0.6mm-10mm. Through foretell setting, can make the amortization hole have suitable size, further guarantee the noise reduction effect of muffler.

In the preferred technical scheme of the silencer for the air spring, the silencing interlayer is foam rubber, mineral wool, glass wool or felt. Through foretell setting, can richen the kind of amortization intermediate layer, satisfy the diversified demand of product.

The utility model provides an air spring, which aims to solve the technical problem that a silencer for the air spring in the prior art is low in noise reduction efficiency. The air spring includes: an exhaust pipe; and the muffler for an air spring according to any one of the above, and the muffler is fixed to the exhaust pipe. By adopting the silencer for the air spring, the air spring can reduce noise of the air exhausted by the exhaust pipe, and the use experience of a user is effectively improved.

The utility model provides a vehicle for solving the technical problem of low noise reduction efficiency of a silencer for an air spring in the prior art. The vehicle includes the air spring described above. By adopting the air spring, the vehicle can effectively reduce noise generated by exhaust of the exhaust pipe of the air spring on the basis of improving the stability of the vehicle, thereby improving the use experience of users.

Scheme 1. A muffler for an air spring, characterized in that it comprises: a housing having a circumferential wall enclosing a hollow chamber; a connection pipe inserted into the chamber and having a sound-deadening section on which a plurality of sound-deadening holes spaced apart from each other are provided and a connection section connected to the sound-deadening section and adapted to communicate with an exhaust pipe of the air spring; and a sound deadening interlayer disposed in the chamber between the circumferential wall and the sound deadening section, and separating a predetermined flow passage communicating with the external environment between the sound deadening interlayer and the sound deadening section.

The muffler for an air spring according to claim 1, wherein the housing further includes: a bottom wall closed and located at a first end of the circumferential wall; and an exhaust port located at a second end of the circumferential wall opposite the first end, and through which the predetermined flow passage communicates with the external environment.

The muffler for an air spring according to claim 1 or 2, further comprising: a support bracket having a bracket body inserted into the chamber to support the sound deadening interlayer, and spacing the predetermined flow passage between the bracket body and the sound deadening section.

The muffler for an air spring according to claim 3, wherein the bracket body, the sound deadening segment, the sound deadening interlayer, and the circumferential wall have center axes that coincide with each other.

The muffler for an air spring according to claim 4, wherein the bracket body includes a plurality of axial ribs surrounding the central axis and a plurality of circumferential ribs spaced apart along the central axis.

The muffler for an air spring according to claim 3, wherein the support bracket further includes an annular wall extending radially outward from an end of the bracket body, and a predetermined gap is spaced between the annular wall and the circumferential wall.

Aspect 7. The muffler for an air spring according to aspect 1, wherein the muffler section has an inner cavity extending along a central axis thereof, and a total area of all the muffler holes is larger than an area of a cross section of the inner cavity perpendicular to the central axis.

The muffler for an air spring according to claim 7, wherein each of the sound deadening holes has a diameter of 0.6mm to 10mm.

The silencer for an air spring according to claim 1, wherein the silencing interlayer is foam rubber, mineral wool, glass wool or felt.

An air spring according to claim 10, wherein the air spring comprises: an exhaust pipe; and the muffler for an air spring according to any one of aspects 1 to 9, and the muffler is fixed to the exhaust pipe.

A vehicle comprising the air spring of claim 10.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an embodiment of a muffler for an air spring of the present utility model;

FIG. 2 is a schematic cross-sectional view of an embodiment of the muffler for an air spring of the present utility model taken along section line A-A shown in FIG. 1;

FIG. 3 is an exploded view of an embodiment of the muffler for an air spring of the present utility model.

List of reference numerals:

1. a muffler; 10. a housing; 11. a circumferential wall; 111. a first end; 112. a second end; 12. a bottom wall; 13. an exhaust port; 14. a chamber; 20. a connecting pipe; 21. a sound attenuation section; 211. a sound deadening hole; 212. an inner cavity; 22. a connection section; 30. a silencing interlayer; 40. a support bracket; 41. a bracket body; 411. axial ribs; 412. circumferential ribs; 42. an annular wall; 421. a connecting pipe hole; 50. a predetermined flow path; 60. a predetermined gap.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

In order to solve the technical problem of low noise reduction efficiency of the silencer for the air spring in the prior art, the utility model provides the silencer 1 for the air spring. The muffler 1 includes: a housing 10, the housing 10 having a circumferential wall 11 enclosing a hollow chamber 14; a connection pipe 20, the connection pipe 20 being inserted into the chamber 14 and having a sound deadening section 21 and a connection section 22 connected to the sound deadening section 21 and adapted to communicate with an exhaust pipe of the air spring, a plurality of sound deadening holes 211 being provided on the sound deadening section 21 at intervals; and a sound deadening interlayer 30, the sound deadening interlayer 30 being disposed in the chamber 14 between the circumferential wall 11 and the sound deadening section 21, and a predetermined flow passage 50 communicating with the external environment being spaced between the sound deadening interlayer 30 and the sound deadening section 21.

In one or more embodiments, the air spring of the present utility model includes an exhaust pipe and a muffler 1 fixed to the exhaust pipe so as to reduce noise generated at the time of high-pressure exhaust. The air spring further includes, but is not limited to, an air bag for containing compressed air, an air compressor for charging compressed air into the air bag, a shock absorber disposed in the air bag, and the like. Wherein, the exhaust pipe is communicated with the air bag to timely discharge the high-pressure gas in the air bag. When the air spring works, compressed air with preset pressure (for example, 0.7Mpa and the like) is filled in the air bag to form a compressed air column. With the increase of the vibration load, the height of the air spring is reduced, the air bag volume is reduced, the rigidity of the air spring is increased, the effective bearing area of the compressed air column is increased, and the bearing capacity of the air spring is increased. Accordingly, when the vibration load amount is reduced, the height of the air spring is increased, the air bag volume is increased, the rigidity of the air spring is reduced, the effective bearing area of the compressed air column is reduced, and the bearing capacity of the air spring is reduced. Further, the pressure in the air bag can be increased by controlling the air compressor to charge air into the air bag, and the pressure in the air bag can be correspondingly reduced by controlling the opening of the exhaust pipe, so that the rigidity of the air spring can be flexibly adjusted to meet the actual requirements of different working conditions.

FIG. 1 is a schematic structural view of an embodiment of a muffler for an air spring of the present utility model; FIG. 2 is a schematic cross-sectional view of an embodiment of the muffler for an air spring of the present utility model taken along section line A-A shown in FIG. 1; FIG. 3 is an exploded view of an embodiment of the muffler for an air spring of the present utility model. An embodiment of the muffler 1 for an air spring according to the present utility model will be described with reference to fig. 1 to 3.

As shown in fig. 1-3, in one or more embodiments, the muffler 1 for an air spring of the present utility model includes a housing 10, a connection pipe 20, a muffler interlayer 30, and the like. Based on the orientation shown in fig. 1, the housing 10 is a cylinder extending in a generally left-right direction. Preferably, the housing 10 is a cylinder with a circular cross-section. Alternatively, the cross-section of the housing 10 may be square, rectangular, or other suitable shape. The housing 10 may be machined from a suitable metal material to provide good mechanical properties. Alternatively, the housing 10 may be made of PC, PET, PA6 or other suitable resin materials to reduce the weight of the muffler 1 and the manufacturing cost. The housing 10 has a circumferential wall 11 enclosing a hollow chamber 14. The formation of chamber 14 facilitates the accommodation of other components therein (e.g., connection tube 20, sound attenuating interlayer 30, etc.). The circumferential wall 11 extends in the direction of the central axis C of the housing 10. The circumferential wall 11 has oppositely disposed first and second ends 111, 112. Based on the orientation shown in fig. 2, the first end 111 is located at the right end of the circumferential wall 11, while the second end 112 is located at the left end of the circumferential wall 11. Alternatively, the first end 111 may also be provided as the left end of the circumferential wall 11, while the second end 112 is provided as the right end of the circumferential wall 11.

With continued reference to fig. 2, in one or more embodiments, a closed bottom wall 12 is formed on a first end 111 of the circumferential wall 11 and an open exhaust port 13 is formed on a second end 112. Through the arrangement, the whole circumferential wall 11 forms a structure with one closed end and one open end, so that the flow stroke of air flow can be properly prolonged, and the noise reduction effect is enhanced. Alternatively, the circumferential wall 11 may also be provided in a structure that is open at both ends, i.e. open at both the first end 111 and the second end 112 of the circumferential wall 11. Preferably, the bottom wall 12 is integrally formed with the circumferential wall 11 to reduce machining costs. Alternatively, the bottom wall 12 and the circumferential wall 11 may be formed separately and then fixed together by welding, screwing, clamping, or other suitable means, so long as the tightness of the connection between the bottom wall 12 and the circumferential wall 11 is ensured. In addition, the exhaust port 13 is provided not only to facilitate the installation of the connection pipe 20, the sound deadening interlayer 30, and the like, but also to facilitate the communication of the predetermined flow passage 50 formed in the chamber 14 with the outside environment.

As shown in fig. 2 and 3, the connecting tube 20 has a moderate tube diameter so as to be inserted into the chamber 14 of the circumferential wall 11. The connection pipe 30 has a hollow tubular structure. The connection pipe 30 may be processed from a suitable metal material (e.g., stainless steel, etc.), or a suitable resin material (e.g., PC, PE, etc.), etc., to have good mechanical properties. In one or more embodiments, the connecting tube 20 is an "open-ended, closed-ended" structure. The opening of the connecting tube 20 is adapted to communicate with the exhaust tube of the air spring, and the closed end of the connecting tube 20 is adapted to be secured to the bottom wall 12 of the housing 10. The fastening means include, but are not limited to, snap-fit connections, threaded connections, etc. Alternatively, the connection pipe 20 may be provided in a structure with both ends open, as long as the sealing performance between the connection pipe 20 and the bottom wall 12 can be ensured.

With continued reference to fig. 2, the connection pipe 20 includes a sound deadening segment 21 and a connection segment 22 that is connected to the sound deadening segment 21. Wherein the sound attenuating segment 21 is located near the first end 111 of the circumferential wall 11 and the connecting segment 22 is located near the second end 112 of the circumferential wall 11. In the assembled state, the sound attenuating segment 21 is positioned entirely within the chamber 14 of the housing 10, while the connecting segment 22 extends out of the chamber 14. The connecting section 22 is adapted to communicate with the exhaust pipe of the air spring. The manner of securement between the connection section 22 and the exhaust pipe includes, but is not limited to, a snap fit connection, a threaded connection, etc. Preferably, the connecting section 22 and the sound deadening section 21 are integrally formed to reduce processing costs. Alternatively, the connecting section 22 and the silencing section 21 may be separately processed and then assembled together. In one or more embodiments, the connecting section 22 and the sound attenuating section 21 have the same pipe diameter, so that the connecting pipe has a simple structure and is easy to process. Alternatively, the pipe diameter of the connecting section 22 may be set to be different from the pipe diameter of the sound deadening section 21 as long as the sound deadening section 31 can be brought into communication with the exhaust pipe.

With continued reference to fig. 2, sound attenuating segment 21 encloses an interior cavity 212 extending along its central axis C. In one or more embodiments, the interior cavity 212 has a generally circular cross-section. Alternatively, the interior cavity 212 may be provided in a square, rectangular, or other suitable shape. A plurality of silencing holes 211 are formed on the silencing section 21 at intervals from each other so that high-pressure gas discharged from the exhaust pipe rubs against the wall of the hole while flowing through the silencing holes 211, and both the flow rate and pressure of the gas are reduced, thereby achieving the first noise reduction. The number and arrangement of the sound deadening holes 211 can be adjusted according to actual needs. Each sound deadening hole 21 has a substantially circular shape for easy processing. In one or more embodiments, each sound attenuation hole 211 has a diameter of 0.6mm-10mm, such that it has a moderate size. Further, the total area of all the sound deadening holes 211 is larger than the area of the cross section of the inner chamber 312 perpendicular to the center axis C. Through the above arrangement, the silencing holes 211 have a larger total area to ensure the noise reduction effect.

As shown in fig. 1-3, a sound damping interlayer 30 is arranged in the chamber 14 of the housing 10 between the circumferential wall 11 and the sound damping section 21. In one or more embodiments, sound attenuating interlayer 40 is secured to circumferential wall 21 such that it has a stable structure. The fixing manner includes but is not limited to bonding, clamping and the like. The silencer interlayer 30 surrounds the silencer section 21 on the outer circumferential side, and a predetermined flow passage 50 communicating with the outside environment is provided between the silencer interlayer 30 and the silencer section 21. In one or more embodiments, the sound attenuating interlayer 30, the circumferential wall 11 of the housing 10, and the sound attenuating segment 21 have central axes C that are coincident with one another to improve the uniformity and overall effectiveness of the noise reduction of the muffler 1. The sound damping interlayer 30 includes, but is not limited to, foam, mineral wool, glass wool, felt, or the like. The sound-deadening interlayer 30 has a loose porous structure, so that sound waves entering the sound-deadening interlayer 30 rub against the sound-deadening interlayer 30 when propagating among the pores, and the sound energy is converted into heat energy, thereby realizing the second noise reduction. The predetermined flow passage 50 communicating with the external environment is spaced between the sound deadening interlayer 30 and the sound deadening segment 21, so that the gas discharged from the exhaust pipe of the air spring can be conveniently discharged to the external environment along the predetermined flow passage 50 after being discharged through the sound deadening hole 211 along the connection pipe 20.

As shown in fig. 1-3, in one or more embodiments, the muffler 1 of the present utility model further includes a support bracket 40. In the assembled state, the support bracket 40 may be inserted into the chamber 14 of the housing 10 to fix the sound deadening interlayer 30. In one or more embodiments, the support bracket 40 includes a bracket body 41. In the assembled state, the holder body 41 is located between the sound deadening section 21 and the sound deadening interlayer 30 such that the sound deadening interlayer 30 is confined between the holder body 41 and the circumferential wall 11, and the predetermined flow passage 50 is spaced between the holder body 41 and the sound deadening section 21, so that the structure of the predetermined flow passage 50 is more stable and reliable. In one or more embodiments, the bracket body 41, the sound attenuating segment 21, the sound attenuating interlayer 30, and the circumferential wall 11 of the housing 10 all have central axes C that coincide with each other, so that the entire muffler 1 has a simple and regular structure, and uniformity and effect of noise reduction can be ensured. One end of the holder body 41 is fixed to the bottom wall 12. The fastening means include, but are not limited to, snap-fit connections, threaded connections, etc. In one or more embodiments, the bracket body 41 includes a plurality of axial ribs 411 surrounding the central axis C and a plurality of circumferential ribs 412 spaced apart from each other in the direction of the central axis C. By the above arrangement, the entire holder body 41 is made to have a stable and firm structure to support the sound deadening interlayer 30. In addition, the axial ribs 411 and Zhou Xiangjin 412 are arranged in a crossed manner, so that the bracket body 41 has a hollowed-out structure, and sound waves can conveniently pass through the bracket body 41 and enter the silencing interlayer 30. It should be noted that the number and arrangement of the axial ribs 411 and the circumferential ribs 412 may be adjusted as needed.

With continued reference to fig. 1-3, in one or more embodiments, the support bracket 40 further includes an annular wall 42. The annular wall 42 is fixed with the holder body 41. Specifically, in the assembled state, a majority of the bracket body 41 is positioned within the cavity 14 of the housing 10, and at least a portion of the bracket body 41 extends out of the cavity 14. An annular wall 42 is positioned at one end of the holder body 41 extending out of the chamber 14. Based on the orientation shown in fig. 2, in one or more embodiments, the annular wall 42 is positioned at the left end of the bracket body 41. Alternatively, when the housing 10 is of a two-end opening structure, the left and right ends of the holder body 41 may extend out of the chamber 14 at the same time, and annular walls 42 are provided at the left and right ends of the holder body 41, respectively. An annular wall 42 extends radially outwardly from the end of the holder body 41. A predetermined gap 60 is spaced between the annular wall 42 and the circumferential wall 11. The provision of the predetermined gap 60 allows the flow of gas discharged through the predetermined flow path 50 to be conveniently discharged to the outside environment along the predetermined gap 60. A connection pipe hole 421 for receiving the connection pipe 20 is formed in the middle portion of the annular wall 42 so that the sound deadening segment 21 of the connection pipe 20 is easily inserted into the chamber 14 of the casing 10 through the connection pipe hole 421.

In order to solve the technical problem of low noise reduction efficiency of the silencer for the air spring in the prior art, the utility model provides a vehicle (not shown in the figure). The vehicle includes the air spring according to any one of the above embodiments, and the muffler 1 is provided on the exhaust pipe of the air spring so as to reduce noise generated by high-pressure exhaust. The vehicle can be an electric vehicle, a fuel oil vehicle or a hybrid electric vehicle. The vehicle may be a sedan, SUV, MPV, or other suitable vehicle type.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. A muffler for an air spring, the muffler comprising:

a housing having a circumferential wall enclosing a hollow chamber;

a connection pipe inserted into the chamber and having a sound-deadening section on which a plurality of sound-deadening holes spaced apart from each other are provided and a connection section connected to the sound-deadening section and adapted to communicate with an exhaust pipe of the air spring; and

and the silencing interlayer is arranged in the cavity and positioned between the circumferential wall and the silencing section, and a preset flow passage communicated with the external environment is arranged between the silencing interlayer and the silencing section.

2. The muffler for an air spring as defined in claim 1, wherein the housing further includes:

a bottom wall closed and located at a first end of the circumferential wall; and

an exhaust port located at a second end of the circumferential wall opposite the first end, and the predetermined flow passage communicates with the external environment through the exhaust port.

3. The muffler for an air spring according to claim 1 or 2, further comprising:

a support bracket having a bracket body inserted into the chamber to support the sound deadening interlayer, and spacing the predetermined flow passage between the bracket body and the sound deadening section.

4. A muffler for an air spring according to claim 3, wherein the bracket body, the sound attenuating segment, the sound attenuating interlayer, and the circumferential wall have central axes that coincide with each other.

5. The muffler for an air spring of claim 4, wherein the bracket body includes a plurality of axial ribs surrounding the central axis and a plurality of circumferential ribs spaced apart along the central axis.

6. A muffler for an air spring as defined in claim 3, wherein the support bracket further includes an annular wall extending radially outwardly from an end of the bracket body, and wherein a predetermined gap is spaced between the annular wall and the circumferential wall.

7. The muffler for an air spring as defined in claim 1, wherein the sound attenuating segment has an inner cavity extending along a central axis thereof, and a total area of all the sound attenuating holes is greater than an area of a cross-section of the inner cavity perpendicular to the central axis.

8. The muffler for an air spring as claimed in claim 7, wherein each of the muffler holes has a diameter of 0.6mm to 10mm.

9. An air spring, characterized in that the air spring comprises:

an exhaust pipe; and

the muffler for an air spring according to any one of claims 1 to 8, and the muffler is fixed to the exhaust pipe.

10. A vehicle characterized in that it comprises an air spring according to claim 9.

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