CN212272367U - Exhaust silencer and all-terrain vehicle - Google Patents

Abstract

The embodiment of the application provides an exhaust muffler and all-terrain vehicle, exhaust muffler includes silencer main part, tail pipe and decorates the cover, decorates the cover and locates the tail pipe, decorates cover and silencer main part fixed connection. In the embodiment of the application, the decorative cover is fixed on the silencer main body, so that the decorative cover does not increase the weight of the tail pipe; in the assembling process, a larger gap does not need to be reserved between the decorative cover and the tail pipe, so that the radiation of waste gas to the vehicle body can be better prevented; moreover, the decorative cover has a certain positioning function on the tail pipe, and the reliability of the tail pipe is enhanced.

Description

Exhaust silencer and all-terrain vehicle

Technical Field

The application relates to the technical field of exhaust mufflers of vehicles, in particular to an exhaust muffler and an all-terrain vehicle.

Background

For example, an all-terrain vehicle is often provided with an exhaust port trim cover at the exhaust port of the muffler. In the related art, the exhaust port decorative cover is mainly installed in two ways, one scheme is that the exhaust port decorative cover is fixed on a vehicle body, the exhaust port decorative cover and a silencer are of a separated structure, and due to the fact that the accumulated assembly error is large, a large gap needs to be reserved between an exhaust tail pipe and the exhaust port decorative cover in order to meet the assembly requirement, and therefore the function of the exhaust port decorative cover can be affected; another solution is to arrange the exhaust port trim cover on the tail pipe, which increases the weight of the tail pipe and risks tearing the mounting bracket.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiments of the present application are expected to provide an exhaust muffler and an all-terrain vehicle with better stress conditions.

In order to achieve the above object, a first aspect of the embodiments of the present application provides an exhaust muffler, which includes a muffler body, a tail pipe and a decoration cover, wherein the decoration cover is disposed on the tail pipe, and the decoration cover is fixedly connected to the muffler body.

In some embodiments, the muffler body includes a housing and a partition within the housing that separates a space within the housing into at least two expansion chambers; the tail pipe communicates with an expansion chamber located furthest downstream in the exhaust flow path.

In some embodiments, the number of the tail pipes is two, the decorating covers are correspondingly arranged on each tail pipe, the air inlet ends of the two tail pipes extend into the shell from the two transversely opposite ends of the shell, and the two decorating covers are arranged at the two transversely opposite ends of the shell.

In some embodiments, the heat insulation plate comprises an upper heat insulation plate arranged at the top of the shell, and the two decorative covers are fixedly connected to two opposite lateral ends of the upper heat insulation plate.

In some embodiments, the decorative cover is connected to the muffler body by screws; or the decorative cover and part of the structure of the silencer main body are integrally formed; alternatively, the decorative cover is welded to the muffler body.

In some embodiments, the exhaust muffler comprises a support frame, one end of the support frame is fixedly connected with the muffler main body, and the other end of the support frame is supported at the bottom of the decorative cover.

In some embodiments, the exhaust muffler further includes a bolt member that fixedly connects the decorative cover to the support bracket.

In some embodiments, the muffler body includes an exhaust distribution pipe disposed within the housing, with one of the tailpipes disposed at a first end of the exhaust distribution pipe and the other of the tailpipes disposed at a second end of the exhaust distribution pipe, the exhaust distribution pipe directing exhaust gas from one of the expansion chambers furthest downstream in the exhaust flow path to both of the tailpipes.

In some embodiments, the exhaust muffler includes a spark arrester disposed within the housing and coupled to an intake end of the tail pipe, the spark arrester being at least partially inserted within the exhaust distribution pipe.

A second aspect of an embodiment of the present application provides an all-terrain vehicle, including a vehicle body, an engine, and any of the above exhaust mufflers, the engine and the muffler main body being disposed at a tail portion of the vehicle body, the exhaust tail pipe being communicated with an exhaust port of the engine.

According to the exhaust muffler, the decoration cover is fixedly connected to the muffler main body, the muffler main body bears the weight of the decoration cover, and the tail pipe cannot bear the weight of the decoration cover, so that the decoration cover cannot increase the weight of the tail pipe basically, and the stress condition of the tail pipe cannot be adversely affected; in addition, in the assembly process, a larger gap does not need to be reserved between the decorative cover and the tail pipe, so that the radiation of the exhaust gas exhausted from the tail pipe to the vehicle body can be better prevented; moreover, because the decoration cover can be firmly connected to the silencer main body, the decoration cover can have a certain positioning effect on the tail pipe, the tail pipe is prevented from forming a cantilever supporting structure, the stress condition of the tail pipe is improved, and the reliability of the tail pipe is enhanced.

Drawings

Fig. 1 is a schematic structural view of an exhaust muffler according to an embodiment of the present application;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a schematic partially exploded view of the structure shown in FIG. 2;

FIG. 4 is a schematic view of the secure attachment of the trim cover shown in FIG. 1 to the upper heat shield;

FIG. 5 is a schematic illustration of a tailpipe and spark arrester assembly according to an embodiment of the present application, with portions broken away;

FIG. 6 is a left side view of FIG. 2;

FIG. 7 is a cross-sectional view taken along the line A-A in FIG. 6, wherein the broken lines and arrows indicate the exhaust gas flow path;

fig. 8 is a partially enlarged schematic view of a portion B in fig. 7.

Description of the reference numerals

An expansion chamber 1 a; a first expansion chamber 1 a'; a second expansion chamber 1a "; a third expansion chamber 1 a'; a housing 11; a cylinder 110; an end plate 111; a support frame 113; a separator 12; an exhaust distribution pipe 13; a first baffle 131; a second shutter 132; a second through hole 13 a; an airway tube 14; a third through hole 14 a; a support sleeve 15; a through hole 15 a; a front heat insulating panel 16; a rear heat insulating plate 17; an upper insulating panel 18; a sound absorbing material 19; a tail pipe 20; a flange 21; a graphite pad 22; a decorative cover 24; mounting holes 24 a; a spark arrester 30; a support tube 31; the air vent hole 31 a; a fire-extinguishing net 32; exhaust pipe 40

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the embodiments of the present application, the "front", "rear", "left" and "right" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1, and the lower side in fig. 1 is the "left" and the upper side is the "right". The "up", "down", orientation or positional relationship is based on the orientation or positional relationship shown in fig. 2. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

In the embodiment of the present application, "lateral" refers to a left-right direction along the vehicle.

The embodiment of the application provides an exhaust silencer, in particular to an exhaust silencer for a vehicle. The specific type of vehicle is not limited.

Referring to fig. 1 to 3, the exhaust muffler includes a muffler body, a tail pipe 20 and a decoration cover 24, wherein the tail pipe 20 is sleeved with the decoration cover 24, and the decoration cover 24 is fixedly connected to the muffler body. The trim cover 24 can block the flow of the exhaust gas from the tail pipe 20 from radiating toward the vehicle body, thereby reducing the thermal influence on the vehicle body. Illustratively, the trim cover 24 has a mounting hole 24a extending through the trim cover 24, and the exhaust end of the tail pipe 20 is inserted into the mounting hole 24 a.

According to the exhaust muffler of the embodiment of the application, the decoration cover 24 is fixedly connected to the muffler main body, the muffler main body bears the weight of the decoration cover 24, and the tail pipe 20 cannot bear the weight of the decoration cover 24, so that the decoration cover 24 basically cannot increase the weight of the tail pipe 20, and the stress condition of the tail pipe 20 cannot be adversely affected; in addition, in the assembly process, a larger gap does not need to be reserved between the decorative cover and the tail pipe, so that the radiation of the exhaust gas exhausted from the tail pipe 20 to the vehicle body can be better prevented; moreover, because the decoration cover 24 can be firmly connected to the muffler body, the decoration cover 24 can have a certain positioning function on the tail pipe 20, thereby preventing the tail pipe 20 from forming a cantilever supporting structure, improving the stress condition of the tail pipe 20 and enhancing the reliability of the tail pipe 20.

The fixing connection manner of the decorative cover 24 and the muffler main body is not limited, for example, in one embodiment, the decorative cover 24 and the muffler main body are connected by screws; in another embodiment, the trim cover 24 is integrally formed with a portion of the muffler body; in yet another embodiment, the trim cover 24 is welded to the muffler body.

Exemplarily, the exhaust muffler is applied to an all-terrain vehicle, which includes a vehicle body, an engine and the exhaust muffler, wherein the engine and the muffler main body are both disposed at the tail of the vehicle body, and the exhaust tail pipe is communicated with the exhaust port of the engine. The exhaust muffler further treats the exhaust gas from the engine.

In one embodiment, the muffler body includes a housing 11 and a partition 12 located inside the housing 11, the partition 12 partitioning a space inside the housing 11 into at least two expansion chambers 1 a; the tail pipe 20 communicates with one expansion chamber 1a located most downstream in the exhaust flow path.

In one embodiment, the exhaust muffler includes an exhaust pipe 40, and the exhaust pipe 40 introduces exhaust gas into one expansion chamber 1a located most upstream in the exhaust flow path.

The specific structural form of the muffler body is not limited. For example, in an embodiment, referring to fig. 7, the housing 11 is substantially box-shaped, and exemplarily, the housing 11 includes a hollow cylinder 110 and end plates 111 located at two opposite ends of the cylinder 110 along the length direction, the two opposite ends of the cylinder 110 along the length direction are open, and the end plates 111 close the open position of the cylinder 110, that is, the cylinder 110 and the end plates 111 at two sides together enclose a relatively closed space. It should be noted that the cross-sectional shape of the cylinder 110 along the direction perpendicular to the length direction thereof is not limited, and may be rectangular, circular, oval, ellipse-like, and the like, and is not limited herein.

In order to reduce the thermal influence of the housing 11 on the vehicle body, in an embodiment, referring to fig. 1, the muffler main body further includes a front heat shield 16, a rear heat shield 17, and an upper heat shield 18. The front heat insulation plate 16 is disposed at the front side of the drum 110, the rear heat insulation plate 17 is disposed at the rear side of the drum 110, and the upper heat insulation plate 18 is disposed at the top side of the drum 110.

In one embodiment, referring to fig. 2, the exhaust muffler includes a support frame 113, one end of the support frame 113 is fixedly connected to the muffler body, and the other end of the support frame 113 is supported at the bottom of the decorative cover 24. The support frame 113 further supports the decoration cover 24, so that the decoration cover 24 is at least provided with two-point support, the decoration cover 24 is prevented from being supported by a cantilever, the stress condition of the decoration cover 24 is further improved, the joint of the decoration cover 24 and the muffler main body is prevented from cracking, and the structural reliability of the decoration cover 24 is improved.

In one embodiment, the exhaust muffler further includes bolt members that fixedly couple the trim cover 24 to the support bracket 113.

In one embodiment, referring to fig. 5, the exhaust muffler includes a flange 21, and the flange 21 surrounds the circumferential surface of the tail pipe 20. Referring to fig. 8, the inlet end of the tail pipe 20 extends into the housing 11, the flange 21 contacts the outer stop of the housing 11, and the tail pipe 20 is fixedly connected to the housing 11 through the flange 21, for example, by bolts. During assembly, the flange 21 and the tail pipe 20 are first fixedly connected together, for example by welding. Subsequently, the air inlet end of the tail pipe 20 penetrates through the end plate 111 and is inserted into the housing 11 until the flange 21 is contacted with the outer surface stop of the end plate 111, and the flange 21 can realize the quick positioning of the tail pipe 20 and the end plate 111, thereby ensuring the batch consistency of the installation positions of the tail pipes 20 and improving the assembly efficiency. And finally, fixedly connecting the flange 21 with the end plate 111 through bolts and the like.

It can be understood that, in order to enhance the air tightness of the casing 11 and prevent air leakage at the interface between the tail pipe 20 and the casing 11, referring to fig. 7 and 8, a graphite pad 22 may be additionally disposed between the flange 21 and the end plate 111, and the graphite pad 22 may be used for effective sealing.

It is understood that there may be one or two tail pipes 20. In one embodiment, referring to fig. 2, the number of the tail pipes 20 is two, the number of the decorative covers 24 is two, each tail pipe 20 is correspondingly provided with a decorative cover 24, the air inlet ends of the tail pipes 20 extend into the housing 11 from the two transversely opposite ends of the housing 11, and the two decorative covers 24 are located at the two transversely opposite ends of the housing 11. Specifically, one of the tail pipes 20 extends into the housing 11 through one of the end plates 111, and the other tail pipe 20 extends into the housing 11 through the other end plate 111. Thus, after the all-terrain vehicle is provided with the exhaust silencer of the embodiment, the two exhaust tail pipes 20 can be positioned at the left side and the right side of the vehicle, so that the all-terrain vehicle has two exhaust ports, and has better appearance aesthetic feeling

In one embodiment, referring to fig. 1, the exhaust pipe 40 and one of the tail pipes 20 extend into the housing 11 from the same end of the housing 11, that is, the exhaust pipe 40 passes through one of the end plates 111 and then extends into the housing 11, so that the pipe distribution is relatively centralized, and the structure is compact and the appearance is beautiful.

In one embodiment, referring to FIG. 4, two trim covers 24 are fixedly attached to the laterally opposite ends of the upper insulating panel 18. During assembly, the two trim covers 24 and the upper heat shield 18 may be assembled together as a rigid unit, such as by welding, bolting, etc. After the tail pipe 20 is fixedly connected to the casing 11, the decorative cover 24 is sleeved on the tail pipe 20, and the upper heat insulation plate 18 is synchronously installed on the top of the casing 11.

In one embodiment, referring to fig. 7, the muffler body includes an exhaust distribution pipe 13 disposed in the housing 11, wherein one tail pipe 20 is disposed at a first end of the exhaust distribution pipe 13 along the length direction, and the other tail pipe 20 is disposed at a second end of the exhaust distribution pipe 13 along the length direction, and the exhaust distribution pipe 13 guides exhaust gas from one expansion chamber 1a located at the most downstream of the exhaust flow path to the two tail pipes 20. The exhaust distribution pipe 13 can distribute the exhaust gas of the expansion chamber 1a located most downstream in the exhaust flow path relatively uniformly into the two tail pipes 20, so that the two tail pipes 20 can exhaust relatively uniformly.

In one embodiment, referring to fig. 7 and 8, the exhaust muffler further includes a spark arrester 30, the spark arrester 30 is disposed in the housing 11 and connected to the intake end of the tail pipe 20, and the spark arrester 30 is at least partially inserted into the exhaust distribution pipe 13. That is, the exhaust gas flows through the exhaust distribution pipe 13, the spark arrester 30, and the tail pipe 20 in this order. The spark arrestor 30 is capable of extinguishing sparks entrained within the exhaust gas. The all-terrain vehicle may be walking in forests, mountainous regions and other environments, and the spark arrester 30 can further improve the safety of the all-terrain vehicle and prevent fire.

In one embodiment, referring to fig. 5, the spark arrestor 30 includes a support tube 31 and a fire screen 32. It should be noted that the fire-extinguishing net 32 is woven from metal wires. One end of the support pipe 31 is fixedly connected with the tail pipe 20, the other end of the support pipe 31 is a closed end, a plurality of vent holes 31a are arranged on the pipe wall of the support pipe 31, and the fire-extinguishing net 32 is wrapped on the circumferential outer surface of the support pipe 31. When the exhaust gas moves to the end of the support pipe 31 along the exhaust distribution pipe 13, since the end of the support pipe 31 is closed, the exhaust gas enters around the support pipe 31 and enters into the support pipe 31 through the fire net 32 at the air holes 31a, that is, the exhaust gas flows inward in the radial direction of the support pipe 31 to the inside of the support pipe 31. As the exhaust gas passes through the screen 32, the screen 32 extinguishes sparks entrained within the exhaust gas. The support tube 31 supports the fire-extinguishing net 32, and the support tube 31 itself also serves as a flow guide. So set up, can increase the area of contact of waste gas and fire extinguishing net 32, promote fire extinguishing net 32's the reliability of putting out a fire.

The number of the vent holes 31a is not limited, and a large number of vent holes 31a may be provided to ensure the flow rate of the exhaust gas while ensuring sufficient support strength of the support pipe 31.

The shape of the vent hole 31a is not limited, and may be circular, rectangular, kidney-shaped, or the like, and is not limited herein. For example, in the embodiment of the present application, the vent holes 31a are kidney-shaped holes extending in the axial direction of the support pipe 31, the number of the vent holes 31a is multiple, and the plurality of vent holes 31a are arranged at intervals in the circumferential direction of the support pipe 31. Thus, not only can the support pipe 31 be ensured to have enough support strength, but also the exhaust gas can be conveniently entered into the support pipe 31 from the fire extinguishing net 32 at the vent hole 31a during the axial movement along the outer side of the support pipe 31.

In an embodiment, referring to fig. 7 and 8, the muffler main body further includes two supporting sleeves 15 disposed in the casing 11, one end of each supporting sleeve 15 is fixedly connected to the casing 11, the spark arrester 30 is disposed in the supporting sleeve 15, two opposite ends of the exhaust distribution pipe 13 are sleeved outside the supporting sleeves 15, and the supporting sleeves 15 support and position the exhaust distribution pipe 13. Specifically, one end of the exhaust distribution pipe 13, the support sleeve 15, and the spark arrester 30 form a layer-by-layer nested structure.

It should be noted that the support sleeve 15 and the spark arrester 30 have a gap in the radial direction, so that the exhaust gas enters the gap and then enters the support pipe 31 through the fire screen 32.

In one embodiment, with continued reference to fig. 8, an enclosed space is formed between the exhaust distribution pipe 13 and the support sleeve 15, and the enclosed space is filled with the sound absorbing material 19, that is, the exhaust distribution pipe 13 and the support sleeve 15 are radially spaced apart to leave a space filled with the sound absorbing material 19. The wall of the support sleeve 15 is provided with a plurality of through-going holes 15a to guide part of the air flow inside the support sleeve 15 into the sound-absorbing material 19.

The specific type of the sound absorbing material 19 is not limited as long as the sound absorbing function can be achieved. Such as mineral wool, glass wool, felt, etc.

Since the through-hole 15a is formed in the support sleeve 15, the support sleeve 15 resembles a perforated plate which, in combination with the external sound-absorbing material 19, has a sound-absorbing effect on medium and high frequencies.

It should be noted that the closed space can exchange air only through the through-hole 15a, in other words, the closed space is closed at other positions. Specifically, referring to fig. 8, a first baffle 131 and a second baffle 132 may be sleeved outside the supporting sleeve 15, the first baffle 131 and the second baffle 132 are spaced apart from each other in the axial direction of the supporting sleeve 15, and the sound-absorbing material 19 is filled between the first baffle 131 and the second baffle 132.

The number of the partition plates 12 is not limited, and may be, for example, two or more. The specific shape of the partition plate 12 is not limited, and may be a flat plate, a wave, a curved shape, or the like. The plurality of partitions 12 can partition at least the space inside the casing 11 into at least three expansion chambers 1 a.

Illustratively, in one embodiment, with continued reference to fig. 7, the number of the partition plates 12 is two, the number of the expansion chambers 1a is three, and the two partition plates 12 are spaced apart along the length direction of the exhaust distribution pipe 13 to sequentially partition the interior of the housing 11 into a first expansion chamber 1a ', a second expansion chamber 1a ", and a third expansion chamber 1a'", with the second expansion chamber 1a "being located between the first expansion chamber 1a 'and the third expansion chamber 1 a'". Specifically, the partition plate 12 is substantially parallel to the end plate 111 described above.

One end of the exhaust pipe 40 protrudes into the first expansion chamber 1a ', that is, the first expansion chamber 1a' is the one expansion chamber 1a located most upstream in the exhaust gas flow path. The exhaust distribution pipe 13 communicates with the second expansion chamber 1a ", that is, the second expansion chamber 1a" is one expansion chamber 1a located most downstream in the exhaust gas flow path. Since the second expansion chamber 1a "is located between the first expansion chamber 1a 'and the third expansion chamber 1a'", in order to guide the exhaust gas in the first expansion chamber 1a 'to the third expansion chamber 1a' ", the muffler body further includes a gas guide tube 14, the gas guide tube 14 penetrates the two partition plates 12, specifically, the gas inlet end of the gas guide tube 14 is located in the first expansion chamber 1a ', the gas outlet end of the gas guide tube 14 is located in the third expansion chamber 1a'", and the gas guide tube 14 guides the exhaust gas in the first expansion chamber 1a 'to the third expansion chamber 1a' ".

In order to facilitate the flow of the exhaust gas in the third expansion chamber 1a ' "into the second expansion chamber 1a", the partition plate 12 between the second expansion chamber 1a "and the third expansion chamber 1a '" is provided with a plurality of first through holes through which the exhaust gas in the third expansion chamber 1a ' "enters the second expansion chamber 1 a".

In one embodiment, the exhaust distribution pipe 13 penetrates through the two partition plates 12, and the two partition plates 12 support the exhaust distribution pipe 13. A first end of the exhaust distribution pipe 13 is located in the first expansion chamber 1a 'and a second end of the exhaust distribution pipe 13 is located in the third expansion chamber 1a' ″. It should be noted that the exhaust gas in the exhaust distribution pipe 13 is isolated from the exhaust gas in the first expansion chamber 1a ', the exhaust gas in the exhaust distribution pipe 13 is also isolated from the exhaust gas in the third expansion chamber 1a' ″, and only the exhaust gas in the second expansion chamber 1a ″ enters the exhaust distribution pipe 13. The pipe wall of the exhaust distribution pipe 13 located in the second expansion chamber 1a ″ is provided with a plurality of second through holes 13a, that is, the pipe wall located between the two partition plates 12 is provided with a plurality of second through holes 13a, and the exhaust gas in the second expansion chamber 1a ″ enters the exhaust distribution pipe 13 through the plurality of second through holes 13 a.

In order to facilitate the exhaust gas in the second expansion chamber 1a to enter the exhaust distribution pipe 13 more smoothly, the plurality of second through holes 13a are arranged substantially along the circumferential direction of the exhaust distribution pipe 13, so that the exhaust gas can enter the exhaust distribution pipe 13 along the circumferential direction of the exhaust distribution pipe 13.

In one embodiment, referring to fig. 7, an end of the air duct 14 located in the third expansion chamber 1a ' ″ is a closed end, a plurality of third through holes 14a are formed in a wall of the air duct 14 located in the third expansion chamber 1a ' ″, and the exhaust gas in the air duct 14 enters the third expansion chamber 1a ' ″ through the third through holes 14 a.

In one embodiment, a catalyst is disposed in the exhaust pipe 40, so that the harmful gas in the exhaust gas can be fully converted, and the purification capability of the exhaust muffler is improved.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. An exhaust muffler characterized by comprising

A muffler main body;

a tail pipe (20);

decorate cover (24), decorate cover (24) cover and locate tail pipe (20), decorate cover (24) with silencer main part fixed connection.

2. The exhaust muffler according to claim 1, wherein the muffler main body includes a housing (11) and a partition (12) located inside the housing (11), the partition (12) partitioning a space inside the housing (11) into at least two expansion chambers (1 a); the tail pipe (20) communicates with one expansion chamber (1a) located most downstream in the exhaust flow path.

3. The exhaust muffler according to claim 2, wherein the number of the tail pipes (20) is two, the decorative covers (24) are correspondingly provided on each tail pipe (20), the intake ends of the tail pipes (20) extend into the housing (11) from the laterally opposite ends of the housing (11), and the decorative covers (24) are located at the laterally opposite ends of the housing (11).

4. The exhaust muffler according to claim 3, wherein the muffler body includes an upper heat insulating plate (18) provided on the top of the housing (11), and the two decorative covers (24) are fixedly attached to the laterally opposite ends of the upper heat insulating plate (18).

5. The exhaust muffler according to claim 1, characterized in that the decorative cover (24) is connected with the muffler body by screws; or the decorative cover (24) is integrally formed with part of the structure of the silencer main body; alternatively, the trim cover (24) is welded to the muffler body.

6. The exhaust muffler according to claim 1, wherein the exhaust muffler includes a support bracket (113), one end of the support bracket (113) is fixedly connected to the muffler body, and the other end of the support bracket (113) is supported at the bottom of the decorative cover (24).

7. The exhaust muffler according to claim 6, further comprising a bolt member that fixedly connects the decorative cover (24) to the support bracket (113).

8. The exhaust muffler according to claim 3, wherein the muffler body comprises an exhaust distribution pipe (13) disposed in the housing (11), wherein one of the tail pipes (20) is disposed at a first end of the exhaust distribution pipe (13), wherein the other of the tail pipes (20) is disposed at a second end of the exhaust distribution pipe (13), and wherein the exhaust distribution pipe (13) guides exhaust gas from one expansion chamber (1a) located most downstream of an exhaust flow path to both of the tail pipes (20).

9. The exhaust muffler according to claim 8, characterized in that it comprises a spark arrester (30), said spark arrester (30) being arranged in the housing (11) and being connected to the inlet end of the tail pipe (20), said spark arrester (30) being at least partially inserted in the exhaust distribution pipe (13).

10. An all-terrain vehicle comprising a vehicle body, an engine, and the exhaust muffler of any of claims 1-9, the engine and the muffler body both being disposed at an aft portion of the vehicle body, the tail pipe communicating with an exhaust port of the engine.

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