Bellows assembly, exhaust system, and vehicle

Abstract

This utility model discloses a bellows assembly, an exhaust system, and a vehicle, relating to the field of exhaust systems. The bellows assembly includes: a bellows body, mating parts, and mating parts connected to both ends of the bellows body along its axial direction; and an elastic element connected between the mating parts at both ends of the bellows body, with the elastic element located on the outside of the bellows body. Thus, by connecting the elastic element between the mating parts at both ends of the bellows body, when the bellows assembly is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element can absorb energy through elastic deformation to reduce the torsional impact on the bellows body, thereby improving the circumferential stiffness and torsional resistance of the bellows assembly, reducing the risk of airtightness failure due to bellows assembly cracking, and thus enabling the engine to maintain normal power output and emission performance, which is beneficial to improving the reliability of the exhaust system.

Description

Technical Field

[0001] This utility model relates to the field of exhaust systems, and in particular to a bellows assembly, an exhaust system, and a vehicle. Background Technology

[0002] In related technologies, under special conditions such as extreme off-roading and sharp turns, the vehicle's exhaust system will be subjected to complex three-dimensional composite torsion and large-angle torsion. However, the bellows assembly used in traditional exhaust systems can only adapt to axial compression and radial displacement. Under the repeated action of alternating torsional stress, the spring layer of the bellows assembly is prone to plastic deformation, which leads to fatigue cracking of the weld at its trough or crest, causing airtightness failure. Furthermore, in some extreme cases, it can lead to complete rupture of the bellows, causing abnormal increase in engine exhaust back pressure, which seriously damages the engine's power output performance and emission performance. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a bellows assembly with high circumferential stiffness and good torsional resistance, which can meet the large-angle torsional resistance requirements of the vehicle's exhaust system.

[0004] This utility model further proposes an exhaust system.

[0005] This utility model further proposes a vehicle.

[0006] The corrugated pipe assembly according to this utility model includes: a corrugated pipe body, a mating component, wherein the mating component is connected to both ends of the corrugated pipe body along the axial direction of the corrugated pipe body; and an elastic component, wherein the elastic component is connected between the mating components at both ends of the corrugated pipe body and the elastic component is located on the outside of the corrugated pipe body.

[0007] According to the present invention, the bellows assembly, by connecting the elastic element between the mating parts at both ends of the bellows body, when the bellows assembly is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element can absorb energy through elastic deformation to reduce the torsional impact on the bellows body, thereby improving the circumferential stiffness and torsional resistance of the bellows assembly, reducing the risk of airtightness failure due to cracking of the bellows assembly, and thus enabling the engine to maintain normal power output and emission performance, which is beneficial to improving the reliability of the exhaust system.

[0008] In some examples of this utility model, there are multiple elastic elements, and the multiple elastic elements are arranged around the bellows body.

[0009] In some examples of this utility model, along the axial direction of the corrugated pipe body, the two ends of the elastic element are respectively engaged with the mating parts at both ends of the corrugated pipe body.

[0010] In some examples of this utility model, the elastic element includes: an elastic body and a snap-fit ​​portion. Along the axial direction of the corrugated pipe body, both ends of the elastic body are provided with the snap-fit ​​portion. The mating component forms a snap-fit ​​hole, and the snap-fit ​​portion passes through the snap-fit ​​hole to snap-fit ​​with the corresponding mating component.

[0011] In some examples of this utility model, the mating member forms multiple sets of holes, each set of holes including multiple snap-fit ​​holes, the number of elastic members being the same as and corresponding one-to-one with the number of holes, and the snap-fit ​​portion passing through multiple snap-fit ​​holes in the corresponding set of holes to snap-fit ​​with the corresponding mating member.

[0012] In some examples of this utility model, the snap-fit ​​portion is an arc-shaped segment.

[0013] In some examples of this utility model, the elastic element is constructed as a helical spring;

[0014] And / or, the bellows body has a gas flow channel, and the mating part has a connecting hole that communicates with the gas flow channel.

[0015] The exhaust system according to this utility model includes: an intake assembly, a bellows assembly, and an exhaust assembly. The bellows assembly is the bellows assembly described above. Along the axial direction of the bellows assembly, the intake assembly and the exhaust assembly are respectively disposed at both ends of the bellows assembly, and both the intake assembly and the exhaust assembly are connected to the bellows assembly.

[0016] According to the exhaust system of this utility model, by connecting the elastic element between the mating parts at both ends of the bellows body, when the bellows assembly is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element can absorb energy through elastic deformation to reduce the torsional impact on the bellows body, thereby improving the circumferential stiffness and torsional resistance of the bellows assembly, reducing the risk of airtightness failure caused by cracking of the bellows assembly, and thus enabling the engine to maintain normal power output performance and emission performance, which is beneficial to improving the reliability of the exhaust system.

[0017] In some examples of this invention, the intake assembly includes a catalyst for purifying vehicle exhaust gases.

[0018] The vehicle according to this utility model includes the above-mentioned exhaust system. By connecting the elastic element between the mating parts at both ends of the bellows body, when the bellows assembly is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element can absorb energy through elastic deformation to reduce the torsional impact on the bellows body, thereby improving the circumferential stiffness and torsional resistance of the bellows assembly, reducing the risk of airtightness failure due to cracking of the bellows assembly, and thus enabling the engine to maintain normal power output performance and emission performance, which is beneficial to improving the reliability of the exhaust system.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the exhaust system according to an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a partial structural schematic diagram of the exhaust system according to an embodiment of the present utility model.

[0024] Figure label:

[0025] Exhaust system 100;

[0026] 10. Intake assembly; 11. Intake flange; 12. Intake end cone; 13. Front oxygen transmitter base; 14. Catalyst; 15. Catalyst bracket; 16. Outlet end cone; 17. Rear oxygen transmitter base.

[0027] Bellows assembly 20; bellows body 21; elastic element 22; elastic body 221; snap-fit ​​part 222; mating part 23; connection hole group 24; snap-fit ​​hole 25; gas flow channel 26; connecting hole 27;

[0028] Exhaust assembly 30; exhaust pipe 31; exhaust flange 32; hook assembly 33. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] Under extreme off-road conditions and sharp turns, the vehicle's exhaust system will be subjected to complex three-dimensional compound torsion and large-angle torsion. However, the bellows used in traditional exhaust systems can only adapt to axial compression and radial displacement. Under the repeated action of alternating torsional stress, the spring layer of the bellows is prone to plastic deformation, which leads to fatigue cracking of the weld at its trough or crest, causing airtightness failure. In some extreme cases, it can even cause the bellows to completely break, resulting in an abnormal increase in engine exhaust back pressure, which seriously damages the engine's power output performance and emission control effect. The bellows assembly 20 of this application connects the elastic element 22 between the mating parts 23 at both ends of the bellows body 21. When the exhaust system 100 is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element 22 can absorb energy through elastic deformation to reduce the torsional impact on the bellows body 21, thereby improving the circumferential stiffness and torsional performance of the bellows assembly 20, reducing the risk of airtight failure caused by cracking of the bellows assembly 20, maintaining normal power output and emission performance of the engine, and improving the reliability of the exhaust system 100.

[0031] The following is for reference. Figure 1 and Figure 2 A bellows assembly 20 according to an embodiment of the present invention is described.

[0032] like Figure 1 and Figure 2 As shown, the corrugated pipe assembly 20 according to an embodiment of the present utility model includes: a corrugated pipe body 21, an elastic element 22, and a mating element 23.

[0033] Along the axial direction of the bellows body 21 (i.e. Figure 1 (As shown in the X direction), both ends of the bellows body 21 are connected to mating parts 23; the elastic part 22 is connected between the mating parts 23 at both ends of the bellows body 21, and the elastic part 22 is located outside the bellows body 21.

[0034] Among them, along the axial direction of the bellows body 21 (i.e. Figure 1 (As shown in the X direction), the corrugated pipe body 21 has two opposite ends, and both ends of the corrugated pipe body 21 are connected to mating parts 23. The connection method between the corrugated pipe body 21 and the mating parts 23 can be, but is not limited to, snap-fit, welding, etc. As some embodiments of this application, the corrugated pipe body 21 and the mating parts 23 are welded together.

[0035] The elastic element 22 is connected between the mating parts 23 at both ends of the bellows body 21. As in some embodiments of this application, the elastic element 22 is along the axial direction of the bellows body 21 (i.e., Figure 1 The bellows body 21 is extended in the X direction as shown. Furthermore, the elastic element 22 is located outside the bellows body 21.

[0036] The elastic element 22 and the mating element 23 can be connected by, but are not limited to, welding, snap-fitting, etc. As some embodiments of this application, the elastic element 22 and the mating element 23 are connected by snap-fitting.

[0037] It should be noted that when the bellows body 21 is subjected to three-dimensional composite torsion and large-angle torsion, the elastic element 22 can absorb energy through elastic deformation by bending, converting most of the torsional energy into the elastic potential energy of the elastic element 22 itself, and generating a reverse restoring torque, thereby reducing the risk of plastic deformation, fatigue cracking, and airtight failure of the bellows body 21. The bellows assembly 20 proposed in this application can achieve multi-directional coupled torsional resistance. Through nonlinear circumferential stiffness adjustment and elastic deformation energy absorption mechanism, it can simultaneously reduce the peak value of alternating torsional stress and delay weld fatigue cracking and airtight failure.

[0038] Therefore, by connecting the elastic element 22 between the mating parts 23 at both ends of the bellows body 21, when the bellows assembly 20 is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element 22 can absorb energy through elastic deformation to reduce the torsional impact on the bellows body 21, thereby improving the circumferential stiffness and torsional resistance of the bellows assembly 20, reducing the risk of airtight failure caused by cracking of the bellows assembly 20, maintaining normal power output performance and emission effect of the engine, and improving the reliability of the exhaust system 100.

[0039] In some embodiments of this utility model, such as Figure 2 As shown, there are multiple elastic elements 22, which are arranged around the bellows body 21.

[0040] The number of elastic elements 22 can be multiple, including but not limited to two or three. Multiple elastic elements 22 are arranged around the bellows body 21. That is, multiple elastic elements 22 are all located on the outside of the bellows body 21 and are arranged in a circumferential array around the bellows body 21.

[0041] As some embodiments of this application, the number of elastic elements 22 is six, and the six elastic elements 22 are arranged around the bellows body 21.

[0042] By arranging multiple elastic elements 22 around the bellows body 21, the torsional energy can be decomposed circumferentially and transferred to each elastic element 22, reducing the risk of large local torsional energy, improving the circumferential stiffness of the bellows body 21, and converting the torsional energy into the elastic potential energy of the elastic element 22 itself, so that the torsional energy is not concentrated on the bellows body 21, reducing the risk of airtight failure caused by cracking of the bellows assembly 20, and improving the reliability of the bellows assembly 20.

[0043] In some embodiments of this utility model, such as Figure 2 As shown, along the axial direction of the bellows body 21, the two ends of the elastic element 22 are respectively engaged with the mating parts 23 located at both ends of the bellows body 21.

[0044] Among them, along the axial direction of the bellows body 21 (i.e. Figure 1 (in the X direction shown) The elastic element 22 has two opposite ends, and the two ends of the elastic element 22 can be engaged with the mating parts 23 at both ends of the bellows body 21 respectively.

[0045] As some embodiments of this application, along the axial direction of the bellows body 21 (i.e. Figure 1 (As shown in the X direction), the mating parts 23 at both ends of the corrugated pipe body 21 have snap-fit ​​grooves, and the two ends of the elastic element 22 have snap-fit ​​protrusions. The snap-fit ​​grooves and snap-fit ​​protrusions cooperate with each other so that the two ends of the elastic element 22 can be snapped with the mating parts 23 at both ends of the corrugated pipe body 21 respectively.

[0046] This arrangement can improve the firmness of the connection between the elastic element 22 and the mating parts 23 at both ends of the bellows body 21, reduce the probability that the elastic element 22 will spring off and fall off from the mating parts 23 under the action of torsional energy, and facilitate assembly. Moreover, this arrangement can improve the torsional resistance of the bellows assembly 20, which is beneficial to improving the reliability of the bellows assembly 20.

[0047] In some embodiments of this utility model, such as Figure 2 As shown, the elastic element 22 includes: an elastic body 221 and a snap-fit ​​portion 222. Along the axial direction of the bellows body 21, both ends of the elastic body 221 are provided with snap-fit ​​portions 222. The mating element 23 is formed with a snap-fit ​​hole 25. The snap-fit ​​portion 222 passes through the snap-fit ​​hole 25 to snap-fit ​​with the corresponding mating element 23.

[0048] The elastic element 22 includes an elastic body 221 and a snap-fit ​​portion 222. Along the axial direction of the bellows body 21, the elastic body 221 has two opposite ends, and each of the opposite ends of the elastic body 221 is provided with a snap-fit ​​portion 222. The mating element 23 is formed with a snap-fit ​​hole 25, and the snap-fit ​​portion 222 can pass through the snap-fit ​​hole 25 so that the snap-fit ​​portion 222 snaps into the corresponding mating element 23, so that the elastic element 22 snaps into the mating element 23.

[0049] This design reduces the installation difficulty of the elastic element 22, improves the assembly efficiency of the bellows assembly 20, and enhances the connection between the elastic element 22 and the mating parts 23 at both ends of the bellows body 21. It also reduces the probability that the elastic element 22 will spring off and fall off from the mating parts 23 under the action of torsional energy, thus improving the reliability of the bellows assembly 20.

[0050] In some embodiments of this utility model, such as Figure 2 As shown, the mating part 23 forms multiple sets of contact hole groups 24, each of which includes multiple snap-fit ​​holes 25. The number of elastic members 22 is the same as the number of contact hole groups 24 and corresponds one-to-one. The snap-fit ​​part 222 passes through the multiple snap-fit ​​holes 25 of the corresponding contact hole group 24 to snap-fit ​​with the corresponding mating part 23.

[0051] The number of snap-fit ​​holes 25 can be multiple, including but not limited to two or three. Multiple snap-fit ​​holes 25 can form a hole group 24, and the number of hole groups 24 can be multiple, including but not limited to two or three. As some embodiments of this application, the number of hole groups 24 is six, and each hole group 24 includes two snap-fit ​​holes 25. The number of elastic members 22 is the same as the number of hole groups 24 and corresponds one-to-one.

[0052] The snap-fit ​​portion 222 can pass through multiple snap-fit ​​holes 25 of the corresponding hole group 24 to snap-fit ​​with the corresponding mating member 23. As some embodiments of this application, each hole group 24 includes two snap-fit ​​holes 25. The snap-fit ​​portion 222 of the elastic member 22 can pass through the two snap-fit ​​holes 25 of the corresponding hole group 24 in sequence to snap-fit ​​the elastic member 22 with the corresponding mating member 23.

[0053] This configuration can significantly improve the connection between the elastic element 22 and the mating parts 23 at both ends of the bellows body 21, significantly reduce the risk of separation between the elastic element 22 and the mating parts 23, and help improve the reliability of the bellows assembly 20.

[0054] In some embodiments of this utility model, such as Figure 2 As shown, the snap-fit ​​portion 222 is an arc-shaped segment. This arc-shaped segment is smooth and guides the movement. By making the snap-fit ​​portion 222 an arc-shaped segment, during installation, simply aligning the snap-fit ​​portion 222 with the snap-fit ​​hole 25 and slightly rotating it allows the arc-shaped segment to naturally pass through the snap-fit ​​hole 25, thus engaging the elastic element 22 with the mating element 23. This design reduces the assembly difficulty of the elastic element 22 and improves assembly efficiency. Furthermore, this design enhances the firmness of the connection between the elastic element 22 and the mating elements 23 at both ends of the bellows body 21, significantly reducing the probability of separation between the elastic element 22 and the mating elements 23.

[0055] In some embodiments of this utility model, such as Figure 2 As shown, the elastic element 22 is constructed as a helical spring. By constructing the elastic element 22 as a helical spring, the elastic element 22 can reliably absorb energy through elastic deformation to reduce the torsional impact on the bellows body 21. Furthermore, it is convenient to precisely design the torsional performance and stiffness of the elastic element 22 by changing the parameters of the helical spring, so as to accurately improve the torsional performance and stiffness of the bellows assembly 20. In addition, the helical spring has low cost and stable quality, which helps to reduce the maintenance cost of the bellows assembly 20.

[0056] In some embodiments of this utility model, such as Figure 3 As shown, the bellows body 21 has a gas flow channel 26, and the mating part 23 has a connecting hole 27 that communicates with the gas flow channel 26.

[0057] Specifically, the mating parts 23 at both ends of the bellows body 21 are formed with connecting holes 27, and the bellows body 21 is formed with a gas flow channel 26. The gas flow channel 26 extends along the extension direction of the bellows body 21, and the connecting holes 27 are connected to the gas flow channel 26.

[0058] This arrangement avoids the fitting 23 from obstructing the gas flow, allowing the gas to enter the bellows body 21 through the connecting hole 27 of the fitting 23 at one end and flow out from the connecting hole 27 of the fitting 23 at the other end, so that the gas can flow smoothly through the bellows assembly 20.

[0059] As a specific embodiment of this application, such as Figures 1-3 As shown, the bellows assembly 20 includes: a bellows body 21, an elastic element 22, and a mating element 23, along the axial direction of the bellows body 21 (i.e., Figure 1 (As shown in the X direction), the bellows body 21 has two opposite ends, and both ends of the bellows body 21 are connected to mating parts 23. The bellows body 21 and the mating parts 23 are connected by welding.

[0060] The elastic element 22 is connected between the mating parts 23 at both ends of the bellows body 21. The elastic element 22 and the mating parts 23 are connected by a snap-fit ​​mechanism. The elastic element 22 is along the axial direction of the bellows body 21 (i.e., Figure 1 The bellows body 21 extends in the X direction as shown, and the elastic element 22 is located outside the bellows body 21.

[0061] There are six elastic elements 22. All six elastic elements 22 are located on the outside of the bellows body 21 and are arranged in a circumferential array around the bellows body 21.

[0062] The elastic element 22 includes: an elastic body 221 and a snap-fit ​​portion 222. Along the axial direction of the bellows body 21, both ends of the elastic body 221 are provided with snap-fit ​​portions 222. The snap-fit ​​portion 222 is an arc-shaped segment. The mating part 23 is formed with a snap-fit ​​hole 25. The snap-fit ​​portion 222 passes through the snap-fit ​​hole 25 to snap-fit ​​with the corresponding mating part 23.

[0063] The mating part 23 has six sets of holes 24, each set of holes 24 including two snap-fit ​​holes 25. The snap-fit ​​part 222 passes through the two snap-fit ​​holes 25 of the corresponding set of holes 24 to snap-fit ​​with the corresponding mating part 23.

[0064] The bellows body 21 has a gas flow channel 26, and the mating part 23 has a connecting hole 27 that communicates with the gas flow channel 26. Gas can enter the bellows body 21 through the connecting hole of the mating part 23 at one end and flow out from the connecting hole of the mating part 23 at the other end, so that the gas can flow smoothly through the bellows assembly 20.

[0065] The exhaust system 100 according to this utility model includes: an intake assembly 10, a bellows assembly 20, and an exhaust assembly 30. The bellows assembly 20 is the bellows assembly 20 mentioned above. Along the axial direction of the bellows assembly 20, the intake assembly 10 and the exhaust assembly 30 are respectively disposed at both ends of the bellows assembly 20, and both the intake assembly 10 and the exhaust assembly 30 are connected to the bellows assembly 20.

[0066] The bellows assembly 20 has two opposite ends. The intake assembly 10 and the exhaust assembly 30 are respectively located at the opposite ends of the bellows assembly 20. The connection between the intake assembly 10 and the bellows assembly 20 can be, but is not limited to, welding. The connection between the exhaust assembly 30 and the bellows assembly 20 can be, but is not limited to, welding. Both the intake assembly 10 and the exhaust assembly 30 are connected to the bellows assembly 20.

[0067] Therefore, according to the exhaust system 100 of this application, by connecting the elastic element 22 between the mating parts 23 at both ends of the bellows body 21, when the bellows assembly 20 is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element 22 can absorb energy through elastic deformation to reduce the torsional impact on the bellows body 21, thereby improving the circumferential stiffness and torsional performance of the bellows assembly 20, reducing the risk of airtight failure caused by cracking of the bellows assembly 20, and thus enabling the engine to maintain normal power output performance and emission effect, which is beneficial to improving the reliability of the exhaust system 100.

[0068] As some embodiments of this application, such as Figure 1As shown, the intake assembly 10 also includes: an intake flange 11, an intake end cone 12, a front oxygen transmitter base 13, a catalytic converter 14, a catalytic converter bracket 15, an outlet end cone 16, and a rear oxygen transmitter base 17. The intake flange 11, the intake end cone 12, the catalytic converter 14, and the outlet end cone 16 are connected sequentially by welding. One end of the catalytic converter bracket 15 is located on the catalytic converter 14. The connection between the one end of the catalytic converter bracket 15 and the catalytic converter 14 can be, but is not limited to, welding or bolting. The other end of the catalytic converter bracket 15 is located on the engine. The connection between the other end of the catalytic converter bracket 15 and the engine can be, but is not limited to, welding or bolting. The intake flange 11 is connected to the engine. The intake end cone 12 is equipped with the front oxygen transmitter base 13, and the outlet end cone 16 is equipped with the rear oxygen transmitter base 17. The catalytic converter 14 is used to purify the exhaust gas discharged from the engine.

[0069] As some embodiments of this application, the exhaust assembly 30 includes: an exhaust pipe 31, an exhaust flange 32, and a hook assembly 33. The exhaust pipe 31 and the exhaust flange 32 are connected by welding. The hook assembly 33 is disposed on the outer wall of the exhaust pipe 31. The hook assembly 33 is connected to the exhaust pipe 31 by, but is not limited to, welding, bolting, etc. The hook assembly 33 can be connected to the vehicle body or frame. For example, the hook assembly 33 is connected to the vehicle body or frame by a rubber hanger.

[0070] In some embodiments of this utility model, such as Figure 1 As shown, the intake assembly 10 includes a catalytic converter 14, which is used to purify the vehicle's exhaust gases.

[0071] In this context, vehicle exhaust gas can be understood as the exhaust gas emitted by the engine. As some embodiments of this application, the exhaust gas emitted by the engine sequentially passes through the intake flange 11 and the intake end cone 12 into the catalytic converter 14. The catalytic converter 14 purifies the exhaust gas, which is then discharged into the bellows assembly 20 through the outlet cone 16, and finally exits sequentially through the outlet pipe 31 and the outlet flange 32. This arrangement reduces vehicle exhaust pollution and improves the vehicle's environmental performance.

[0072] The vehicle according to the present invention includes the exhaust system 100 of the above embodiment. By connecting the elastic element 22 between the mating parts 23 at both ends of the bellows body 21, when the bellows assembly 20 is subjected to complex three-dimensional composite torsion and / or large-angle torsion, the elastic element 22 can absorb energy through elastic deformation to reduce the torsional impact on the bellows body 21, thereby improving the circumferential stiffness and torsional performance of the bellows assembly 20, reducing the risk of airtight failure caused by cracking of the bellows assembly 20, and thus enabling the engine to maintain normal power output performance and emission effect, which is beneficial to improving the reliability of the exhaust system 100.

[0073] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0075] In the description of this utility model, "multiple" means two or more.

[0076] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0077] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bellows assembly (20), characterized in that, include: The corrugated pipe body (21) and the fitting part (23) are connected to both ends of the corrugated pipe body (21) along the axial direction of the corrugated pipe body (21). The elastic element (22) is connected between the mating parts (23) at both ends of the corrugated pipe body (21), and the elastic element (22) is located outside the corrugated pipe body (21).

2. The bellows assembly (20) according to claim 1, characterized in that, There are multiple elastic elements (22), and the multiple elastic elements (22) are arranged around the bellows body (21).

3. The bellows assembly (20) according to claim 1, characterized in that, Along the axial direction of the corrugated pipe body (21), the two ends of the elastic element (22) are respectively engaged with the mating parts (23) at both ends of the corrugated pipe body (21).

4. The bellows assembly (20) according to claim 3, characterized in that, The elastic element (22) includes: an elastic body (221) and a snap-fit ​​portion (222). Along the axial direction of the corrugated pipe body (21), the snap-fit ​​portion (222) is provided at both ends of the elastic body (221). The mating element (23) forms a snap-fit ​​hole (25). The snap-fit ​​portion (222) passes through the snap-fit ​​hole (25) to snap-fit ​​with the corresponding mating element (23).

5. The bellows assembly (20) according to claim 4, characterized in that, The mating member (23) forms multiple sets of holes (24), each set of holes (24) including multiple snap-fit ​​holes (25). The number of elastic members (22) is the same as the number of holes (24) and corresponds one-to-one. The snap-fit ​​part (222) passes through the multiple snap-fit ​​holes (25) of the corresponding set of holes (24) to snap-fit ​​with the corresponding mating member (23).

6. The bellows assembly (20) according to claim 4, characterized in that, The snap-fit ​​part (222) is an arc-shaped segment.

7. The bellows assembly (20) according to claim 1, characterized in that, The elastic element (22) is constructed as a helical spring; And / or, the bellows body (21) is formed with a gas flow channel (26), and the mating part (23) is formed with a connecting hole (27) communicating with the gas flow channel (26).

8. An exhaust system (100), characterized in that, include: The bellows assembly (10), the bellows assembly (20), and the exhaust assembly (30) are provided at both ends of the bellows assembly (20) along the axial direction of the bellows assembly (20), and the bellows assembly (10) and the exhaust assembly (30) are connected to the bellows assembly (20).

9. The exhaust system (100) according to claim 8, characterized in that, The intake assembly (10) includes a catalyst (14) for purifying the vehicle's exhaust gases.

10. A vehicle, characterized in that, Includes the exhaust system (100) according to claim 8 or 9.

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