Silencing tail pipe assembly and vehicle

Abstract

The invention relates to the technical field of vehicle post-processing, and particularly discloses a silencing tail pipe assembly and a vehicle, and the silencing tail pipe assembly comprises a telescopic corrugated pipe, a silencing pipe, a tail pipe and a fixing support. The middle hole pipe is arranged in the cavity of the silencing shell, the sound insulation structure is arranged between the silencing shell and the middle hole pipe, high-frequency noise can be effectively eliminated through the middle hole pipe and the sound insulation structure, the noise is reduced by 5dB, and the requirement of a whole vehicle for high-quality noise is met. Meanwhile, the clamping piece is used for clamping the silencing shell, and the silencing shell is connected with the frame through the connecting frame, so that the telescopic corrugated pipe, the silencing pipe and the tail pipe are ensured not to shake greatly in the operation process, and the installation is simple; and the telescopic corrugated pipe is arranged, when the vehicle turns and vehicle frame torsion generated when the vehicle passes through an uneven road can be absorbed by the telescopic corrugated pipe, and the buffering effect is achieved. The problems that a noise elimination tail pipe assembly is high in arrangement difficulty and poor in noise reduction effect are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle aftertreatment, and particularly to a muffler tail pipe assembly and a vehicle. Background Art

[0002] At present, with the development of technology in the industry, higher emission requirements have been imposed on diesel engine exhaust emissions. In order to meet the requirements of National VI emissions, a typical exhaust aftertreatment device usually consists of four parts: DOC (Diesel Oxidation Catalyst), DPF (Diesel Particulate Filter), SCR (Selective Catalytic Reduction), and ASC (Ammonia Slip Catalyst). Through these four parts, harmful pollutants such as hydrocarbons, nitrogen oxides, particulate matter, carbon monoxide, and ammonia generated by urea injection in diesel engine emissions can be removed.

[0003] Since the exhaust aftertreatment device adds DOC and DPF, the size of the vehicle exhaust system becomes larger. Limited by cost and layout space, the main focus of the design of the vehicle exhaust system is to meet emission regulations and fuel economy. Therefore, for the noise reduction requirement of the exhaust system, in the prior art, most use long tail pipes or auxiliary mufflers to meet the requirement of high-quality noise. However, a single long tail pipe can only achieve the function of rectification and cannot reduce the order noise; the interior of the auxiliary muffler usually has multiple chambers, with a complex structure, a relatively large volume, difficult vehicle layout, and a relatively high cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a muffler tail pipe assembly and a vehicle to solve the problems of high layout difficulty and poor noise reduction effect of the muffler tail pipe assembly in the prior art.

[0005] On the one hand, the present invention provides a muffler tail pipe assembly, which includes: an expansion bellows, one end of the expansion bellows can be communicated with the air outlet of the post-processor; a muffler pipe, including a muffler housing, an intermediate hole pipe, and a sound insulation structure, the intermediate hole pipe is arranged in the cavity of the muffler housing, the sound insulation structure is arranged between the muffler housing and the intermediate hole pipe, and one end of the intermediate hole pipe is communicated with the other end of the expansion bellows; a tail pipe, one end of the tail pipe is communicated with the other end of the intermediate hole pipe, and the other end of the tail pipe is communicated with the atmosphere; a fixing bracket, including a clamping member and a connecting frame connected to each other, the clamping member is sleeved on the muffler housing and clamps the muffler housing, and the connecting frame can be connected to the vehicle frame.

[0006] As an alternative technical solution of the muffler tailpipe assembly, the intermediate hole pipe has a plurality of sound-absorbing holes distributed at intervals, and the aperture of the sound-absorbing holes is 3 mm - 4 mm.

[0007] As an alternative technical solution of the muffler tailpipe assembly, one side of the sound insulation structure abuts against the outer wall of the intermediate hole pipe, and the other side of the sound insulation structure abuts against the inner wall of the muffler housing. The thickness of the sound insulation structure is 18 mm - 22 mm.

[0008] As an alternative technical solution of the muffler tailpipe assembly, the sound insulation structure is sound insulation cotton or sound insulation felt.

[0009] As an alternative technical solution of the muffler tailpipe assembly, the tailpipe includes a bent pipe and a first straight pipe that are communicated with each other. The bent pipe is communicated with the other end of the intermediate hole pipe, the first straight pipe is communicated with the atmosphere, and the air outlet of the first straight pipe facing the atmosphere is an inclined cut.

[0010] As an alternative technical solution of the muffler tailpipe assembly, the connecting frame includes a first bracket, a pipe beam and a second bracket. One end of the first bracket is connected to the clamping member, and the other end is connected to one end of the pipe beam. The other end of the pipe beam is connected to the second bracket. The second bracket can be connected to the vehicle frame. The first bracket has a fitting surface, and the shape of the fitting surface matches the shape of the muffler housing and fits against the outer wall of the muffler housing.

[0011] As an alternative technical solution of the muffler tailpipe assembly, the first bracket includes a fitting plate and a first flange and a second flange connected to both sides of the fitting plate. The fitting plate is connected to the clamping member, the fitting plate has the fitting surface, and both the first flange and the second flange are connected to one end of the pipe beam.

[0012] As an alternative technical solution of the muffler tailpipe assembly, the second bracket includes a bracket seat and a connecting block provided on the bracket seat. The bracket seat has a mounting hole, the other end of the pipe beam is inserted into the mounting hole and is connected to the inner wall of the mounting hole, and the connecting block can be connected to the vehicle frame.

[0013] As an alternative technical solution of the muffler tailpipe assembly, the muffler tailpipe assembly further includes a second straight pipe and a third straight pipe. One end of the second straight pipe can be communicated with the air outlet of the post-processor, and the other end is communicated with one end of the expansion bellows. One end of the third straight pipe is communicated with the other end of the expansion bellows, and the other end is communicated with one end of the intermediate hole pipe.

[0014] As an alternative technical solution of the muffler tailpipe assembly, the expansion bellows includes a wire mesh sleeve and an expansion joint provided in the wire mesh sleeve. The length of the expansion joint is 220 mm - 230 mm.

[0015] On the other hand, the present invention provides a vehicle, including the muffler tailpipe assembly in any of the above solutions.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention provides a muffler tailpipe assembly, which includes a telescopic bellows, a muffler pipe, a tailpipe and a fixing bracket. Among them, the muffler pipe includes a muffler outer shell, an intermediate hole pipe and a sound insulation structure; the fixing bracket includes a clamping member and a connecting frame connected to each other. By using the muffler tailpipe assembly of the present invention, the intermediate hole pipe is arranged in the cavity of the muffler outer shell, and the sound insulation structure is arranged between the muffler outer shell and the intermediate hole pipe. High-frequency noise can be effectively eliminated through the intermediate hole pipe and the sound insulation structure, and the noise is reduced by 5 dB, meeting the vehicle's demand for high-quality noise. At the same time, the muffler outer shell is clamped by the clamping member and connected to the vehicle frame through the connecting frame, which ensures that the telescopic bellows, the muffler pipe and the tailpipe will not shake greatly during operation, and the installation is simple; and a telescopic bellows is provided, which can absorb the torsion of the vehicle frame generated when the vehicle turns and passes through uneven roads, playing a buffering role. By using the muffler tailpipe assembly of the present invention, the problems of high layout difficulty and poor noise reduction effect in the prior art are effectively solved. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the muffler tailpipe assembly in an embodiment of the present invention;

[0019] Figure 2 It is a cross-sectional view of the muffler tailpipe assembly in an embodiment of the present invention;

[0020] Figure 3 It is an exploded view of a part of the structure of the muffler tailpipe assembly in an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of a part of the structure of the muffler tailpipe assembly in an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Telescopic bellows; 11. Mesh sleeve; 12. Expansion joint;

[0024] 2. Muffler pipe; 21. Muffler outer shell; 22. Intermediate hole pipe; 221. Muffler hole; 23. Sound insulation structure;

[0025] 3. Tailpipe; 31. Bent pipe; 32. First straight pipe; 321. Oblique cut;

[0026] 4. Fixed bracket; 41. Clamping member; 42. Connecting frame; 421. First bracket; 4211. Fitting plate; 4212. First flanging; 4213. Second flanging; 422. Pipe beam; 4221. Oval structure; 423. Second bracket; 4231. Bracket seat; 4232. Connecting block;

[0027] 51. Second straight pipe; 52. Third straight pipe;

[0028] 6. Aftertreatment device. Detailed implementation manners

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] As Figures 1 to 4 shown, this embodiment provides a muffler tailpipe assembly, which includes a telescopic bellows 1, a muffler pipe 2, a tailpipe 3 and a fixing bracket 4. Wherein, one end of the telescopic bellows 1 can be communicated with the air outlet of the post-processor 6; the muffler pipe 2 includes a muffler housing 21, an intermediate hole pipe 22 and a sound insulation structure 23. The intermediate hole pipe 22 is arranged in the cavity of the muffler housing 21, and the sound insulation structure 23 is arranged between the muffler housing 21 and the intermediate hole pipe 22. One end of the intermediate hole pipe 22 is communicated with the other end of the telescopic bellows 1; one end of the tailpipe 3 is communicated with the other end of the intermediate hole pipe 22, and the other end of the tailpipe 3 is communicated with the atmosphere; the fixing bracket 4 includes a clamping member 41 and a connecting frame 42 which are connected to each other. The clamping member 41 is sleeved on the muffler housing 21 and clamps the muffler housing 21, and the connecting frame 42 can be connected to the vehicle frame.

[0034] By using the muffler tailpipe assembly of the present invention, the intermediate hole pipe 22 is arranged in the cavity of the muffler housing 21, and the sound insulation structure 23 is arranged between the muffler housing 21 and the intermediate hole pipe 22. High-frequency noise can be effectively eliminated through the intermediate hole pipe 22 and the sound insulation structure 23, and the noise is reduced by 5 dB, meeting the vehicle's requirement for high-quality noise. At the same time, the muffler housing 21 is clamped by the clamping member 41 and connected to the vehicle frame through the connecting frame 42, which ensures that the telescopic bellows 1, the muffler pipe 2 and the tailpipe 3 will not shake greatly during operation, and the installation is simple; and the telescopic bellows 1 is provided. When the vehicle turns and the vehicle frame twists due to uneven roads, the telescopic bellows 1 can absorb it, playing a buffering role. By using the muffler tailpipe assembly of the present invention, the problems of high layout difficulty and poor noise reduction effect in the prior art are effectively solved.

[0035] It should be noted that due to the limited layout space of the vehicle, considering the structural limitation of the straight-line segment length of the muffler tailpipe assembly, therefore, the length of the muffler pipe 2 is 300 mm, and the smallest size is achieved on the premise of ensuring the muffling ability.

[0036] Optionally, the two ends of the muffler housing 21 are designed to be closed, which is convenient for connection.

[0037] In some embodiments, such as Figure 2As shown, the middle hole tube 22 has a plurality of sound-absorbing holes 221 distributed at intervals to achieve the purpose of sound absorption. At the same time, the aperture of the sound-absorbing hole 221 is 3 mm - 4 mm. Such a setting can further improve the sound absorption effect. Among them, the aperture of the sound-absorbing hole 221 can be selected according to the actual situation. Specifically, the aperture of the sound-absorbing hole 221 can be selected as 3 mm, 3.5 mm or 4 mm. Preferably, the aperture of the sound-absorbing hole 221 is 3.5 mm, and the sound absorption effect is the best. In this solution, the number of the sound-absorbing holes 221 is 900.

[0038] Optionally, due to the requirements of the overall vehicle layout space, in this solution, the aperture of the middle hole tube 22 is 120 mm, the thickness is 1.5 mm, and the length is 298.5 mm.

[0039] Specifically, one side of the sound insulation structure 23 abuts against the outer wall of the middle hole tube 22, and the other side of the sound insulation structure 23 abuts against the inner wall of the sound absorption housing 21, so that the noise coming out of the middle hole tube 22 can be silenced in time, improving the sound absorption effect; among them, the thickness of the sound insulation structure 23 is 18 mm - 22 mm. Among them, the thickness of the sound insulation structure 23 can be selected according to the actual situation. Specifically, the thickness of the sound insulation structure 23 can be selected as 18 mm, 19 mm, 20 mm, 21 mm or 20 mm, etc. Preferably, the thickness of the sound insulation structure 23 is 20 mm, and the sound absorption effect is the best.

[0040] Optionally, due to the requirements of the overall vehicle layout space, in this solution, the wall thickness of the sound insulation structure 23 is 20 mm, the height is 246 mm, and the inner diameter is 120 mm.

[0041] Furthermore, the sound insulation structure 23 includes, but is not limited to, sound insulation cotton or sound insulation felt. Using sound insulation cotton has good sound insulation and heat insulation effects; similarly, sound insulation felt also has good sound insulation and heat insulation effects.

[0042] In this embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, the tail pipe 3 includes a bent pipe 31 and a first straight pipe 32 that are connected to each other. Among them, the bent pipe 31 is connected to the other end of the middle hole tube 22, and the first straight pipe 32 is connected to the atmosphere. The air outlet of the first straight pipe 32 facing the atmosphere is set as an inclined cut 321, so as to avoid situations such as the exhaust gas scalding people and directly blowing on components.

[0043] Optionally, the inclination angle of the inclined cut 321 is 45°, and a design with large rounded corners is adopted.

[0044] Specifically, as Figure 1 and Figure 3As shown in the figure, the connecting bracket 42 includes a first bracket 421, a pipe beam 422 and a second bracket 423. One end of the first bracket 421 is connected to the clamping member 41, and the other end is connected to one end of the pipe beam 422. The other end of the pipe beam 422 is connected to the second bracket 423, and the second bracket 423 can be connected to the vehicle frame. Among them, the first bracket 421 has a fitting surface, and the shape of the fitting surface matches the shape of the sound insulation housing 21, which facilitates fitting with the outer wall of the sound insulation housing 21 and makes the installation simple.

[0045] Optionally, the first bracket 421 is formed by stamping, and the thickness of the first bracket 421 is 3 mm.

[0046] Optionally, a fillet is added at the connection between the first bracket 421 and the clamping member to avoid sharp edges and corners increasing the stress on the clamping member.

[0047] Furthermore, the first bracket 421 includes a fitting plate 4211 and first flanges 4212 and second flanges 4213 connected to both sides of the fitting plate 4211. Among them, the fitting plate 4211 is connected to the clamping member 41, and the fitting plate 4211 has a fitting surface. The first flanges 4212 and the second flanges 4213 are both connected to one end of the pipe beam 422. With this setting, the connection strength is improved, and the overall structural strength of the bracket is ensured.

[0048] Optionally, the end of the pipe beam 422 has an oval structure 4221, and the first flanges 4212 and the second flanges 4213 are respectively connected to both sides of the oval structure 4221, further improving the connection strength between the pipe beam 422 and the first bracket 421.

[0049] In some embodiments, the second bracket 423 includes a bracket seat 4231 and a connection block 4232 provided on the bracket seat 4231. Among them, the bracket seat 4231 has a mounting hole, the other end of the pipe beam 422 is inserted into the mounting hole and connected to the inner wall of the mounting hole, which facilitates connecting the second bracket 423 and the pipe beam 422, and the connection block 4232 is used to connect to the vehicle frame.

[0050] Optionally, the connection block 4232 has a connection hole, which is convenient for connecting to the vehicle frame.

[0051] Optionally, the second bracket 423 is a casting, which can prevent rainwater from flowing into the pipeline and causing adverse effects such as pipeline rust.

[0052] Optionally, the clamping member includes, but is not limited to, a hose clamp or a pipe clamp, etc. In this solution, the clamping member is a hose clamp, the bandwidth of the hose clamp is 30 mm, and the clamping and fixing are achieved by screwing a screw into the thread. The hose clamp passes through the first bracket 421 and the sound insulation pipe 2 and is clamped and fixed to fix the sound insulation pipe 2 to the vehicle frame. With this setting, the assembly and disassembly operations are simple.

[0053] Specifically, the muffler tailpipe assembly further includes a second straight pipe 51 and a third straight pipe 52. One end of the second straight pipe 51 can communicate with the air outlet of the after-treatment device 6, and the other end communicates with one end of the expansion bellows 1. One end of the third straight pipe 52 communicates with the other end of the expansion bellows 1, and the other end communicates with one end of the intermediate hole pipe 22. With this arrangement, the air flow flows out from the air outlet of the after-treatment device 6, is rectified through the second straight pipe 51 and the expansion bellows 1, then is muffled by the muffler pipe 2, and is rectified again by the third straight pipe 52 and then flows out through the tailpipe 3, achieving the effect of reducing the noise at the orifice of the tailpipe 3 by 5 dB, effectively improving the vehicle noise quality.

[0054] In this embodiment, the expansion bellows 1 includes a wire mesh sleeve 11 and an expansion joint 12 arranged inside the wire mesh sleeve 11. The length of the expansion joint 12 is 220 mm - 230 mm. Among them, the wire mesh sleeve 11 is made of metal. Considering that the muffler tailpipe assembly is arranged across the vehicle frame, the expansion bellows 1 absorbs the torsion of the vehicle frame generated when the vehicle turns and passes over uneven roads. At the same time, due to space limitations in the layout, it is inevitable to have sediment, so a wire mesh sleeve 11 made of metal is added to ensure reliability.

[0055] This embodiment also provides a vehicle, including the muffler tailpipe assembly in the above solution. For the vehicle adopting the present invention, the intermediate hole pipe 22 is arranged in the cavity of the muffler housing 21, and the sound insulation structure 23 is arranged between the muffler housing 21 and the intermediate hole pipe 22. High-frequency noise can be effectively eliminated through the intermediate hole pipe 22 and the sound insulation structure 23, reducing the noise by 5 dB and meeting the vehicle's demand for high-quality noise. At the same time, the muffler housing 21 is clamped by the clamping member 41 and connected to the vehicle frame through the connecting bracket 42, which ensures that the expansion bellows 1, the muffler pipe 2, and the tailpipe 3 will not shake significantly during operation, and the installation is simple; and the expansion bellows 1 is provided, which can absorb the torsion of the vehicle frame generated when the vehicle turns and passes over uneven roads, playing a buffering role. The vehicle adopting the present invention effectively solves the problems of high layout difficulty and poor noise reduction effect of the muffler tailpipe assembly in the prior art.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A muffler tailpipe assembly, characterized in that, Comprising: An expansion bellows (1), one end of the expansion bellows (1) being capable of communicating with the air outlet of the post-processor (6); A silencing pipe (2), including a silencing outer shell (21), an intermediate hole pipe (22), and a sound insulation structure (23), the intermediate hole pipe (22) being arranged in the cavity of the silencing outer shell (21), the sound insulation structure (23) being arranged between the silencing outer shell (21) and the intermediate hole pipe (22), one end of the intermediate hole pipe (22) communicating with the other end of the expansion bellows (1); A tail pipe (3), one end of the tail pipe (3) communicating with the other end of the intermediate hole pipe (22), the other end of the tail pipe (3) communicating with the atmosphere; A fixing bracket (4), including a clamping member (41) and a connecting frame (42) connected to each other, the clamping member (41) being sleeved on the silencing outer shell (21) and clamping the silencing outer shell (21), the connecting frame (42) being capable of connecting to the vehicle frame.

2. The muffler tailpipe assembly according to claim 1, characterized in that, The intermediate hole pipe (22) has a plurality of sound silencing holes (221) distributed at intervals, and the aperture of the sound silencing holes (221) is 3 mm - 4 mm.

3. The muffler tailpipe assembly according to claim 1, characterized in that, One side of the sound insulation structure (23) abuts against the outer wall of the intermediate hole pipe (22), the other side of the sound insulation structure (23) abuts against the inner wall of the silencing outer shell (21), and the thickness of the sound insulation structure (23) is 18 mm - 22 mm.

4. The muffler tailpipe assembly according to claim 1, characterized in that, The sound insulation structure (23) is sound insulation cotton or sound insulation felt.

5. The muffler tailpipe assembly according to claim 1, wherein, The tail pipe (3) includes a bent pipe (31) and a first straight pipe (32) communicating with each other, the bent pipe (31) communicating with the other end of the intermediate hole pipe (22), the first straight pipe (32) communicating with the atmosphere, and the air outlet of the first straight pipe (32) facing the atmosphere being an inclined cut (321).

6. The muffler tailpipe assembly according to claim 1, characterized in that, The connecting frame (42) includes a first bracket (421), a pipe beam (422), and a second bracket (423), one end of the first bracket (421) being connected to the clamping member (41), the other end being connected to one end of the pipe beam (422), the other end of the pipe beam (422) being connected to the second bracket (423), the second bracket (423) being capable of connecting to the vehicle frame, the first bracket (421) having a fitting surface, the shape of the fitting surface matching the shape of the silencing outer shell (21) and fitting against the outer wall of the silencing outer shell (21).

7. The muffler tailpipe assembly according to claim 6, wherein, The first bracket (421) includes a fitting plate (4211) and a first flanging (4212) and a second flanging (4213) connected to both sides of the fitting plate (4211), the fitting plate (4211) being connected to the clamping member (41), the fitting plate (4211) having the fitting surface, and both the first flanging (4212) and the second flanging (4213) being connected to one end of the pipe beam (422).

8. The muffler tailpipe assembly according to claim 6, characterized in that, The second bracket (423) includes a bracket base (4231) and a connection block (4232) disposed on the bracket base (4231). The bracket base (4231) has a mounting hole, and the other end of the pipe beam (422) is inserted into the mounting hole and connected to the inner wall of the mounting hole. The connection block (4232) can be connected to the vehicle frame.

9. The muffler tailpipe assembly according to claim 1, characterized in that, The muffler tail pipe assembly further includes a second straight pipe (51) and a third straight pipe (52). One end of the second straight pipe (51) can communicate with the air outlet of the after-treatment device (6), and the other end communicates with one end of the expansion bellows (1). One end of the third straight pipe (52) communicates with the other end of the expansion bellows (1), and the other end communicates with one end of the intermediate hole pipe (22).

10. The muffler tailpipe assembly according to claim 1, characterized in that, The expansion bellows (1) includes a wire mesh sleeve (11) and an expansion joint (12) disposed in the wire mesh sleeve (11). The length of the expansion joint (12) is 220 mm - 230 mm.

11. A vehicle, characterized in that, Comprising the muffler tail pipe assembly according to any one of claims 1 - 10.

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