CN215213660U - Silencer of automobile exhaust pipe - Google Patents

Abstract

The utility model discloses an automobile exhaust pipe muffler, be hollow structure's muffler shell including inside, the shell opening who link up is seted up at the both ends of muffler shell, the blast pipe has been passed in the shell opening. The utility model discloses when automobile exhaust pipe exhausts and then produces the vibration and send out the sound wave, the sound wave gets into the first acoustical panel that resistance anechoic chamber mechanism in the noise reduction mechanism set up through resistance anechoic chamber mechanism, second acoustical panel and third acoustical panel form the resistance and offset, make the sound wave by the inside absorption of offsetting of resistance anechoic chamber mechanism, the inside harmony reed of harmony pipe simultaneously receives the sound wave to drive the vibration and produces and resist the sound wave, the length difference of harmony pipe and anechoic pipe is half of the sound wave difference, make the wave frequency of resisting the sound wave form harmony undulant with the wave frequency of blast pipe sound wave, and then make the blast pipe sound wave consumed by the harmony, can effectually absorb the sound that the blast pipe sent through the cooperation of the inside individual mechanism of noise reduction mechanism.

Description

Silencer of automobile exhaust pipe

Technical Field

The utility model relates to an automobile exhaust pipe technical field specifically is an automobile exhaust pipe muffler.

Background

In recent years, urban motor vehicles grow rapidly, accompanying traffic noise pollutes the environment increasingly prominently, the biggest harm of automobiles to the environment is noise pollution, and investigation shows that the noise of the motor vehicles accounts for 85.5% of the urban traffic noise, and along with the development of energy conservation and emission reduction of the automobiles, the automobiles are required to reduce the noise and save energy consumption. The most important noise of the automobile comes from an exhaust system of the automobile, namely, the exhaust noise of the automobile exhaust, in order to reduce the exhaust noise of the automobile and meet the requirement of environmental protection of the automobile, the traditional automobile exhaust system realizes noise elimination and noise reduction by installing a silencer, a simple pipe group with a hole is generally adopted in the interior of a common silencer, and although the silencer can achieve the effect of noise elimination, the silencing efficiency of the silencer has a larger space improvement, so that the silencer of the automobile exhaust pipe is provided, and the problem is solved conveniently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automobile exhaust pipe muffler to solve the problem that proposes among the above-mentioned background art.

To achieve the above object, the present invention provides the following solutions:

the utility model provides an automobile exhaust pipe muffler, is hollow structure's muffler shell including inside, the shell opening that link up is seted up at the both ends of muffler shell, it has the blast pipe to pass in the shell opening, the blast pipe is provided with amortization mechanism in the inside outside of shell opening, the one end of amortization mechanism is provided with resistance amortization room mechanism, the one end that resistance amortization room mechanism was kept away from to amortization mechanism is provided with the amortization pipe of adaptation in the outside of blast pipe, the outside of amortization pipe is provided with the cooperative pipe, the length difference value of the length of amortization pipe and cooperative pipe is the car and sends half of sound wave length.

As a further improvement of the technical scheme, the two ends of the opening of the shell are internally provided with raised opening convex blocks, the two ends of the opening of the shell are respectively provided with a muffler cover plate matched with the opening of the shell, the middle position of the muffler cover plate is provided with a through cover plate opening, and the exhaust pipe penetrates through the cover plate opening.

As a further improvement of the technical scheme, the silencing mechanism is provided with silencing cavity plywood at the two ends of the silencing pipe, the silencing cavity plywood is matched with the internal structure of the shell opening, the middle position of the silencing cavity plywood is provided with a through plywood opening, the exhaust pipe penetrates through the plywood opening, and the silencing cavity plywood on the two sides of the silencing pipe and the opening lug form a coordinated silencing cavity.

As a further improvement of the technical scheme, the pipe diameter of the silencing pipe is larger than that of the exhaust pipe, a plurality of sound transmission holes which are uniformly arranged and communicated in a circular array are formed in the outer wall of the silencing pipe, and a Z-shaped coordinating reed is arranged inside one side of the coordinating pipe.

As a further improvement of the technical scheme, a first silencing plate is arranged at one end, close to the silencing pipe, of the reactive silencing chamber mechanism, a third silencing plate is arranged at one end, far away from the silencing pipe, of the reactive silencing chamber mechanism, a second silencing plate is arranged between the first silencing plate and the third silencing plate, through silencing plate openings are formed in the middle positions of the first silencing plate, the second silencing plate and the third silencing plate, and the exhaust pipe penetrates through the silencing plate openings.

As a further improvement of the technical scheme, the first, second and third muffling plates are arranged at equal-difference series distances, the thicknesses of the first, second and third muffling plates are sequentially decreased in a decreasing manner, and the first, second and third muffling plates and the interior of the opening bump form a resistant muffling chamber.

As a further improvement of the technical scheme, the first, second and third muffling plates have the same structure, muffling layers are arranged in the middle of the first, second and third muffling plates, and protective layers are arranged at two ends of each muffling layer.

As a further improvement of the technical scheme, the sound-insulating material is filled in the sound-deadening layer, the sound-insulating material is made of artificial inorganic fibers, and the protective layer is made of a hard decorative plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the device is provided with a silencing mechanism, one side of the silencing mechanism is provided with a resistant silencing chamber mechanism, when the exhaust pipe of the automobile exhausts air to generate vibration and emit sound waves, the sound waves enter the resistant silencing chamber mechanism in the silencing mechanism and form resistant offset through a first silencing plate, a second silencing plate and a third silencing plate arranged in the resistant silencing chamber mechanism, so that the sound waves are offset and absorbed by the interior of the resistant silencing chamber mechanism, meanwhile, a silencing pipe and a cooperating pipe are arranged, the sound waves are transmitted into the silencing pipe after being offset and absorbed by the resistant silencing chamber mechanism and are transmitted to the cooperating pipe through a sound transmitting hole on the silencing pipe, a cooperating reed in the cooperating pipe is driven by the sound waves to vibrate to generate resisting sound waves, the length difference value of the cooperating pipe and the silencing pipe is half of the sound wave difference value, so that the wave frequency of the resisting sound waves and the wave frequency of the exhaust pipe form cooperating fluctuation, and the sound waves of the exhaust pipe are cooperatively consumed, the sound emitted by the exhaust pipe can be effectively absorbed through the cooperative matching of the internal mechanisms of the silencing mechanism.

Drawings

FIG. 1 is a schematic perspective view of an exhaust muffler of an automobile;

FIG. 2 is a schematic diagram of a disassembled structure of the muffler for an automobile exhaust pipe;

FIG. 3 is a schematic diagram of a disassembled structure of a silencer mechanism of an automobile exhaust pipe;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 3;

FIG. 5 is a schematic view of a disassembled structure of a cooperating pipe of the exhaust pipe silencer of the automobile;

FIG. 6 is a schematic view of the interior level of an automotive exhaust muffler silencer panel;

in the figure: 1. a muffler housing; 2. a muffler cover plate; 3. an exhaust pipe; 4. an opening bump; 5. a housing opening; 6. the cover plate is provided with an opening; 7. a silencing mechanism; 8. a sound attenuation cavity plywood; 9. a sound-deadening tube; 10. a sound transmission hole; 11. a cooperative tube; 12. co-acting reed; 13. opening the plywood; 14. a resistive anechoic chamber mechanism; 15. a first acoustical panel; 16. a second acoustical panel; 17. a third sound-deadening panel; 18. an opening of the sound-absorbing plate; 19. a sound-deadening layer; 20. and (4) a protective layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Example 1

Please refer to fig. 1 to 6, in an embodiment of the present invention, an exhaust pipe silencer for a vehicle, includes a silencer housing 1 having a hollow structure inside, a housing opening 5 penetrating through both ends of the silencer housing 1 is formed at both ends of the silencer housing 1, an exhaust pipe 3 passes through the housing opening 5, a silencing mechanism 7 is disposed at an outer side of the exhaust pipe 3 inside the housing opening 5, a reactive silencing chamber mechanism 14 is disposed at one end of the silencing mechanism 7, a silencing pipe 9 adapted to the end of the silencing mechanism 7 away from the reactive silencing chamber mechanism 14 is disposed at an outer portion of the exhaust pipe 3, a cooperating pipe 11 is disposed at an outer side of the silencing pipe 9, a length difference between the silencing pipe 9 and the cooperating pipe 11 is a half of a wavelength of a sound wave emitted by the vehicle, the exhaust pipe 3 is used for connecting to an exhaust mechanism of the vehicle, the exhaust mechanism of the vehicle can vibrate during exhaust to generate sound waves, thereby forming sound wave transmission, and components inside the reactive silencing chamber mechanism 14 can transmit the exhaust pipe 3 through self arrangement and self characteristics Go and offset the absorption, remaining sound wave passes through blast pipe 3 and transmits to hush pipe 9 departments, hush pipe 9 and the cooperation pipe 11 in the outside are because the length difference equals half of sound wave length, can produce when the sound wave transmission comes and resist the sound wave, the low valley peak of the frequency crest of resisting the sound wave of production just staggers each other with the low valley peak of the frequency crest of blast pipe sound wave and forms the cooperative effect, make the blast pipe sound wave offset, realize the effective amortization of blast pipe, improve the effect of blast pipe amortization.

Preferably, all be provided with bellied opening lug 4 in shell opening 5's the both ends, the muffler apron 2 of adaptation is all installed at shell opening 5's both ends, the apron opening 6 that link up is seted up to muffler apron 2's intermediate position department, blast pipe 3 passes apron opening 6, carry out closed formation an inclosed spatial structure with muffler shell 1 through shell opening 5, make the inside part of muffler shell 1 can cooperate inclosed spatial structure to carry out the amortization, 6 the apron opening of seting up on muffler apron 2 is convenient for blast pipe 3 to pass the inside transmission and the amortization that carry out sound of muffler shell 1, opening lug 4 can restrict muffler apron 2, prevent that muffler apron 2 from carrying out the extrusion to the amortization mechanism 7 of muffler shell 1 inside and causing the destruction of arranging the overall arrangement.

Preferably, amortization mechanism 7 all is provided with amortization chamber plywood 8 at amortization pipe 9's both ends, amortization chamber plywood 8 and shell opening 5's inner structure adaptation, the plywood opening 13 that link up is all seted up in amortization chamber plywood 8's intermediate position department, blast pipe 3 passes plywood opening 13, amortization chamber plywood 8 of amortization pipe 9 both sides and the inside harmonious amortization chamber that constitutes of opening lug 4, amortization chamber plywood 8 forms an independent airtight harmonious amortization chamber with shell opening 5, make amortization pipe 9 can carry out good amortization processing to the sound wave when receiving the sound wave that 3 transmissions of blast pipe come, improve the effect of amortization pipe 9 to the sound wave amortization.

Preferably, the pipe diameter of the silencing pipe 9 is larger than that of the exhaust pipe 3, a plurality of sound transmission holes 10 which are uniformly arranged and communicated in a circular array are formed in the outer wall of the silencing pipe 9, a Z-shaped cooperative reed 12 is arranged inside one side of the cooperative pipe 11, sound waves are transmitted to the silencing pipe 9 through the exhaust pipe 3 and are resonated with the cooperative silencing cavity through the sound transmission holes 10 to drive the cooperative pipe 11 to resonate, the cooperative reed 12 inside the cooperative pipe 11 resonates through the resonance of the cooperative pipe 11, and the cooperative reed 12 resonates to form sound wave resisting sound waves, because the length difference between the silencing pipe 9 and the cooperative pipe 11 is general of automobile sound waves, the valley peak of the frequency wave crest of the sound wave resisting formed by the cooperative reed 12 is just staggered with the valley peak of the frequency wave crest of the sound wave of the exhaust pipe to form a cooperative effect, so that the automobile sound waves are offset, and the effective silencing of the exhaust pipe is realized.

Preferably, a first sound-absorbing plate 15 is arranged at one end of the reactive sound-absorbing chamber mechanism 14 close to the sound-absorbing pipe 9, a third sound-absorbing plate 17 is arranged at one end of the reactive sound-absorbing chamber mechanism 14 far away from the sound-absorbing pipe 9, a second sound-absorbing plate 16 is arranged between the first sound-absorbing plate 15 and the third sound-absorbing plate 17, penetrating sound-absorbing plate openings 18 are formed in the middle positions of the first sound-absorbing plate 15, the second sound-absorbing plate 16 and the third sound-absorbing plate 17, the exhaust pipe 3 penetrates through the sound-absorbing plate openings 18, and when the exhaust pipe 3 transmits sound waves to the reactive sound-absorbing chamber mechanism 14, the first sound-absorbing plate 15, the second sound-absorbing plate 16 and the third sound-absorbing plate 17 in the reactive sound-absorbing chamber mechanism 14 counteract and absorb the sound waves transmitted by the exhaust pipe 3 through self arrangement and self characteristics.

Preferably, the first, second and third sound-absorbing plates 15, 16 and 17 are installed at equal-difference array distances, the thicknesses of the first, second and third sound-absorbing plates 15, 16 and 17 are sequentially decreased, the first, second and third sound-absorbing plates 15, 16 and 17 and the interior of the opening bump 4 form a resistant sound-absorbing chamber, the exhaust pipe 3 transmits sound waves to the resistant sound-absorbing chamber mechanism 14, the sound waves are shifted back in the resistant sound-absorbing chamber to generate resonance, the first, second and third sound-absorbing plates 15, 16 and 17 are arranged at different distances and different thicknesses, and the sound waves can be absorbed in different wave frequency bands when the resonance is generated, so that the sound-absorbing effect is achieved.

Preferably, the first, second and third muffling plates 15, 16 and 17 have the same structure, a muffling layer 19 is disposed in the middle of the inside of each of the first, second and third muffling plates 15, 16 and 17, protective layers 20 are disposed at two ends of the muffling layer 19, the muffling layer 19 can absorb and consume sound waves due to its own characteristics, so that a muffling and sound-insulating effect is achieved, and the protective layers 20 can protect the muffling layer 19 and provide devices for the outside.

Preferably, the sound insulation material is filled in the noise reduction layer 19, the sound insulation material is artificial inorganic fiber, the protective layer 20 is made of hard decorative board, the artificial inorganic fiber is made of natural ore such as quartz sand, limestone, dolomite and the like, soda ash and borax, in a melting state, the artificial inorganic fiber is blown into flocculent fine fibers by means of external force, the fibers and the fibers are crossed and intertwined with each other to form a plurality of fine gaps, the fiber sound absorption layer formed in the state has the characteristics of high sound absorption rate, good sound insulation effect and the like, noise generated by tire movement can be effectively absorbed and isolated, the noise reduction and silencing effect is achieved, and the protective layer 20 can protect the sound reduction layer 19 and carry out external installation.

The utility model discloses a theory of operation:

the exhaust pipe 3 is connected with an automobile exhaust mechanism, vibration is generated when the automobile exhaust mechanism exhausts, sound waves are generated, the exhaust pipe 3 transmits the sound waves to a silencing mechanism 7 in a silencer shell 1, the sound waves enter a resistant silencing chamber mechanism 14 firstly after entering the silencing mechanism 7, a first silencing plate 15, a second silencing plate 16 and a third silencing plate 17 arranged in the resistant silencing chamber mechanism 14 and the silencer shell 1 form a resistant silencing chamber, the sound waves generate vibration in the resistant silencing chamber, the vibration is transmitted to the first silencing plate 15, the second silencing plate 16 and the third silencing plate 17, different wave frequency wave bands of the sound waves are absorbed and consumed through protective layers 20 which are different in distance, different in thickness and different in the interior of the first silencing plate 15, the second silencing plate 16 and the third silencing plate 17, the silencing effect is realized, the sound can be effectively eliminated, the residual sound waves after the resistant silencing chamber mechanism 14 is silenced are transmitted to a silencing pipe 9, and the sound transmission hole 10 in the silencing pipe 9 transmits the silencing pipe 9 out of the silencing pipe 9, be provided with amortization chamber plywood 8 at the both ends of amortization pipe 9 and be formed with the harmonious amortization chamber in inside, the sound wave is transferred in coordinating the amortization intracavity and is produced resonance and then make the pipe 11 resonance of cooperateing of intracavity, the spring 12 of cooperateing inside the pipe 11 resonance of cooperateing is followed the vibration and is produced and resist the sound wave, because the length difference of amortization pipe 9 and the pipe 11 of cooperateing is general of automobile sound wave, so the low ebb peak of resisting the frequency crest of sound wave that the spring 12 of cooperateing formed just staggers each other with the low ebb peak of the frequency crest of blast pipe sound wave and forms the cooperative effect, make automobile sound wave offset, realize the effective amortization of blast pipe, further strengthen the amortization performance, improve the noise cancelling effect.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (8)

1. The utility model provides an automobile exhaust pipe muffler, is hollow structure's muffler shell (1) including inside, its characterized in that: the silencer is characterized in that through shell openings (5) are formed in two ends of a silencer shell (1), an exhaust pipe (3) penetrates through the shell openings (5), a silencing mechanism (7) is arranged on the outer side of the inner portion of each shell opening (5) of the exhaust pipe (3), a resistant silencing chamber mechanism (14) is arranged at one end of each silencing mechanism (7), a silencing pipe (9) matched with the silencing mechanism (7) is arranged outside the exhaust pipe (3) at one end of each silencing mechanism (7) far away from the resistant silencing chamber mechanism (14), a cooperative pipe (11) is arranged on the outer side of each silencing pipe (9), and the length difference between the length of each silencing pipe (9) and the length difference between the cooperative pipes (11) is half of the wavelength of sound waves emitted by an automobile.

2. The muffler for an automobile exhaust pipe according to claim 1, wherein: all be provided with bellied opening lug (4) in the both ends of shell opening (5), the muffler apron (2) of adaptation are all installed at the both ends of shell opening (5), apron opening (6) that link up are seted up to the intermediate position department of muffler apron (2), apron opening (6) are passed in blast pipe (3).

3. The muffler for an automobile exhaust pipe according to claim 1, wherein: amortization mechanism (7) all are provided with amortization chamber plywood (8) at the both ends of amortization pipe (9), amortization chamber plywood (8) and the inner structure adaptation of shell opening (5), plywood opening (13) that link up are all seted up in the intermediate position department of amortization chamber plywood (8), blast pipe (3) pass plywood opening (13), amortization chamber plywood (8) and opening lug (4) inside constitution a coordination amortization chamber of amortization pipe (9) both sides.

4. The muffler for an automobile exhaust pipe according to claim 1, wherein: the pipe diameter of the silencing pipe (9) is larger than that of the exhaust pipe (3), a plurality of sound transmission holes (10) which are uniformly arranged in a circular array and run through are formed in the outer wall of the silencing pipe (9), and a Z-shaped coordinating reed (12) is arranged inside one side of the coordinating pipe (11).

5. The muffler for an automobile exhaust pipe according to claim 1, wherein: one end of the reactive sound-absorbing chamber mechanism (14) close to the sound-absorbing pipe (9) is provided with a first sound-absorbing plate (15), one end of the reactive sound-absorbing chamber mechanism (14) far away from the sound-absorbing pipe (9) is provided with a third sound-absorbing plate (17), a second sound-absorbing plate (16) is arranged between the first sound-absorbing plate (15) and the third sound-absorbing plate (17), through sound-absorbing plate openings (18) are formed in the middle positions of the first sound-absorbing plate (15), the second sound-absorbing plate (16) and the third sound-absorbing plate (17), and the exhaust pipe (3) penetrates through the sound-absorbing plate openings (18).

6. The muffler for an automobile exhaust pipe according to claim 5, wherein: the first sound-absorbing plate (15), the second sound-absorbing plate (16) and the third sound-absorbing plate (17) are arranged at equal-difference array distances, the thicknesses of the first sound-absorbing plate (15), the second sound-absorbing plate (16) and the third sound-absorbing plate (17) are sequentially reduced in a decreasing mode, and the first sound-absorbing plate (15), the second sound-absorbing plate (16), the third sound-absorbing plate (17) and the opening convex block (4) form a resistant sound-absorbing chamber.

7. The muffler for an automobile exhaust pipe according to claim 5, wherein: the structure of the first silencing plate (15), the second silencing plate (16) and the third silencing plate (17) is the same, the silencing layers (19) are arranged in the middle of the inside of the first silencing plate (15), the inside of the second silencing plate (16) and the inside of the third silencing plate (17), and the two ends of each silencing layer (19) are provided with the protective layers (20).

8. The muffler for an automobile exhaust pipe according to claim 7, wherein: the sound attenuation layer (19) is filled with sound insulation materials, the sound insulation materials are artificial inorganic fibers, and the protective layer (20) is made of hard decorative plates.

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