Silencer, exhaust valve thereof and vehicle

Abstract

The utility model provides a silencer, an exhaust valve of the silencer and a vehicle. The exhaust valve of the silencer comprises a valve body, a valve arranged on the valve body in a sliding mode and an elastic part arranged between the valve body and the valve. The valve body is used for being installed at an exhaust hole of the silencer, under the action of the elastic part, the valve blocks the exhaust hole, and when the gas pressure in the silencer reaches a preset threshold value, the valve can be pushed to open the exhaust hole, and the elastic part is compressed to store energy. According to the exhaust valve of the silencer, under the action of the elastic part, the valve blocks the exhaust hole, gas in the silencer can be effectively prevented from leaking under the normal condition, and normal work and sealing performance of the silencer are guaranteed. And when the gas pressure in the silencer reaches a preset threshold value, the strong gas pressure can overcome the elastic force of the elastic part, the valve is pushed upwards, and the exhaust hole is opened. At the moment, high-pressure gas accumulated in the silencer can be exhausted outwards through the opened exhaust hole, and the silencer can be effectively prevented from being exploded.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a muffler exhaust valve. It also relates to a muffler equipped with the muffler exhaust valve, and a vehicle equipped with the muffler. Background Technology

[0002] During engine operation, fuel combustion inevitably produces water. Normally, the muffler has a drain hole at the bottom, allowing water to drain smoothly from the drain hole and tailpipe under the combined action of exhaust pressure and gravity. However, in extremely cold environments, frequent engine restarts and brief start-ups result in relatively low exhaust temperatures at idle. This causes condensation to accumulate at the bottom of the muffler and gradually freeze. Over time, this ice cannot melt, eventually completely clogging the drain hole and tailpipe. When the vehicle is restarted, the gas inside the muffler cannot escape properly, causing a rapid increase in pressure. The weak seams cannot withstand this immense pressure and burst, leading to strong complaints from users about the inability to use their vehicles normally due to this malfunction. Utility Model Content

[0003] In view of this, the present invention aims to provide a muffler exhaust valve, which can greatly reduce the risk of the muffler bursting due to excessive internal pressure.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A muffler exhaust valve includes a valve body, a valve slidably disposed on the valve body, and an elastic portion disposed between the valve body and the valve.

[0006] The valve body is installed at the exhaust port of the muffler. Under the action of the elastic part, the valve blocks the exhaust port. When the gas pressure in the muffler reaches a preset threshold, the valve can be pushed to open the exhaust port and the elastic part can be compressed and stored.

[0007] Furthermore, the valve includes a valve body and a guide post disposed on the valve body;

[0008] The valve body is used to block the vent hole, and the guide post is slidably inserted into the valve body and can guide the valve to slide relative to the valve body.

[0009] Furthermore, the elastic portion includes a spring sleeved on the guide post; and / or,

[0010] The guide post has an operating hole at one end away from the valve body, and the operating hole is adapted to be used with external tools.

[0011] Furthermore, the valve body has a connecting post protruding to one side, and the guide post is provided with a connecting hole;

[0012] The connecting post is screwed into the connecting hole and connects the valve body to the guide post.

[0013] Furthermore, the valve body includes a valve body body with a vent hole, a central block disposed in the vent hole, and a connecting rib connecting the central block and the valve body body.

[0014] The valve body is used to connect with the muffler, the vent is provided corresponding to the exhaust port, and the valve is slidably inserted into the center block.

[0015] Furthermore, the valve body is provided with a recessed platform surrounding the vent hole, and the recessed platform has an annular protrusion arranged along its circumference.

[0016] The valve is located on the platform and abuts against the annular protrusion.

[0017] Furthermore, the valve body is provided with a sealing part, which is used to seal the gap between the valve body and the muffler.

[0018] Furthermore, the sealing part includes a sealing groove provided on the valve body, and a sealing ring provided in the sealing groove;

[0019] The sealing ring has a limiting protrusion on its inner and / or outer sides. The limiting protrusion protrudes radially from the sealing ring and abuts against the wall of the sealing groove to prevent the sealing ring from coming out of the sealing groove.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] The muffler exhaust valve of this invention, through the action of the elastic part, seals the exhaust port, effectively preventing gas leakage inside the muffler under normal circumstances, ensuring the normal operation and sealing of the muffler. When the gas pressure inside the muffler reaches a preset threshold, the strong gas pressure overcomes the elastic force of the elastic part, pushing the valve upward and opening the exhaust port. At this time, the high-pressure gas accumulated inside the muffler will be discharged outward through the opened exhaust port, effectively preventing the muffler from bursting. In addition, when the pressure inside the muffler is lower than the preset threshold, the energy stored in the elastic part will be released, pushing the valve back to its original position, resealing the exhaust port, and restoring the muffler to its normal sealing state.

[0022] Furthermore, by including the valve body and the guide post slidably inserted into the valve body, the guide post provides accurate path and direction constraints for the valve's movement, effectively preventing deviations and jamming during operation, thus ensuring the reliability and stability of the exhaust valve. The elastic component, including the spring sleeved on the guide post, has a simple structure, is easy to design and implement, and possesses good durability and repeatability, maintaining relatively stable mechanical properties through multiple compression and rebound cycles. The operating holes on the guide post facilitate the installation, debugging, and subsequent maintenance of the exhaust valve.

[0023] Secondly, by setting a connecting post on the valve body and screwing it into the connecting hole of the guide post, the installation position of the guide post on the valve body can be more precise and fixed, and it is also easy to disassemble and replace. Moreover, during long-term use, the preload of the elastic element can be adjusted by adjusting the connection position between the connecting post and the guide post, which helps to ensure the valve's sealing effect on the vent hole. The valve body includes a valve body with a vent hole, a central block located in the vent hole, and a connecting rib connecting the central block and the valve body. The structure is simple and easy to design and implement.

[0024] Furthermore, by setting a countersunk platform on the valve body, an installation base can be provided for the valve. The annular protrusion on the countersunk platform abuts against the valve, which can limit the valve from a circumferential direction. This can effectively prevent the valve from shifting or shaking in the left-right or front-back directions after installation, and facilitate the smooth sliding of the guide column on the central block. Moreover, compared to a structure where the entire countersunk platform abuts against the valve, the contact area between the two can be reduced, the machining accuracy can be improved, and the sealing effect between the two can be ensured.

[0025] By setting a sealing part on the valve body to seal the gap between the valve body and the muffler, gas can be prevented from leaking out from these gaps. This not only affects the efficiency and effect of exhaust, causing the muffler to fail to perform its functions of noise reduction and exhaust gas purification, but may also cause the leaked high-temperature exhaust gas to have an adverse effect on surrounding vehicle components.

[0026] In addition, the sealing part includes a sealing groove on the valve body and a sealing ring in the sealing groove. The structure is simple and easy to design and implement. By setting a limiting protrusion on the sealing ring that abuts against the groove wall of the sealing groove, the sealing ring can be restricted in the radial direction, which helps to ensure the positional stability of the sealing ring and prevent it from accidentally coming out of the sealing groove under various external forces, thereby ensuring the sealing effect.

[0027] Another objective of this utility model is to provide a muffler, wherein the muffler is provided with a muffler exhaust valve as described above.

[0028] The muffler described in this utility model, by setting the muffler exhaust valve as described above, can effectively prevent the muffler from cracking due to excessive internal pressure, thus ensuring the normal operation of the muffler.

[0029] In addition, this utility model also proposes a vehicle equipped with the muffler described above.

[0030] The vehicle described in this utility model, by setting the muffler as described above, can effectively avoid the muffler from exploding, reduce the risk of muffler failure, and improve the overall quality of the vehicle. Attached Figure Description

[0031] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the muffler exhaust valve according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the muffler exhaust valve described in an embodiment of the present invention from another perspective;

[0034] Figure 3 This is a schematic diagram of the muffler exhaust valve described in an embodiment of the present invention from another perspective;

[0035] Figure 4 for Figure 3 Sectional view of line AA in the middle;

[0036] Figure 5 This is an assembly diagram of the muffler and muffler exhaust valve according to an embodiment of the present utility model;

[0037] Figure 6 for Figure 5 Enlarged view of section B;

[0038] Figure 7 This is an assembly drawing of the muffler exhaust valve and mounting base according to an embodiment of the present utility model;

[0039] Figure 8 for Figure 7 A cross-sectional view of the CC line;

[0040] Figure 9 This is a schematic diagram of the valve body according to an embodiment of the present utility model;

[0041] Figure 10 This is a schematic diagram of the valve body described in an embodiment of the present invention from another perspective;

[0042] Figure 11 This is a schematic diagram of the sealing ring structure according to an embodiment of the present invention;

[0043] Figure 12 This is a schematic diagram of the valve structure described in an embodiment of the present utility model.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Valve body; 2. Valve; 3. Spring; 4. Sealing ring; 5. Silencer; 6. Bolt;

[0046] 101. Valve body; 1011. Protrusion; 1012. Countersunk platform; 1013. Sealing groove; 10121. Annular protrusion; 102. Center block; 103. Connecting rib;

[0047] 201. Valve body; 202. Guide column;

[0048] 401. Limiting protrusion;

[0049] 501. Muffler body; 502. Mounting bracket. Detailed Implementation

[0050] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0051] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0053] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] Example 1

[0055] Given the common problems in existing technologies, in extremely cold environments, when the exhaust port of the muffler 5 is blocked by ice, the gas inside the muffler 5 cannot be discharged normally, and the pressure rises sharply. The weak locking seam cannot withstand such enormous pressure and is prone to bursting. Therefore, this embodiment specifically proposes a muffler exhaust valve, which, in its overall structure, includes a valve body 1, a valve 2 slidably disposed on the valve body 1, and an elastic part disposed between the valve body 1 and the valve 2.

[0056] The valve body 1 is installed at the exhaust port of the muffler 5. Under the action of the elastic part, the valve 2 blocks the exhaust port. When the gas pressure in the muffler 5 reaches the preset threshold, it can push the valve 2 to open the exhaust port and compress and store energy in the elastic part.

[0057] In this embodiment, the muffler exhaust valve, through the action of the elastic part, causes valve 2 to seal the exhaust port, effectively preventing gas leakage within the muffler 5 under normal circumstances, ensuring the normal operation and sealing of the muffler 5. When the gas pressure inside the muffler 5 reaches a preset threshold, the strong gas pressure overcomes the elastic force of the elastic part, pushing valve 2 upward and opening the exhaust port. At this time, the high-pressure gas accumulated inside the muffler 5 will be discharged outward through the opened exhaust port, effectively preventing the muffler 5 from bursting. In addition, when the pressure inside the muffler 5 is lower than the preset threshold, the energy stored in the elastic part will be released, pushing valve 2 back to its original position, resealing the exhaust port, and restoring the muffler 5 to its normal sealing state.

[0058] Based on the above overview, an exemplary structure of the muffler exhaust valve in this embodiment is as follows: Figures 1 to 4 As shown in the figure, here, for ease of explanation, the following also refers to... Figures 5 to 8 The diagram shown illustrates the assembly state of the muffler exhaust valve on muffler 5. Specifically, as... Figure 5 and Figure 6 As shown, the muffler 5 of this embodiment includes a muffler body 501 and a mounting base 502 disposed outside the muffler body 501, and the muffler body 501 is provided with an exhaust port. In addition, the mounting base 502 is disposed at the exhaust port and has a through hole corresponding to the exhaust port, and the valve body 1 is detachably disposed on the mounting base 502.

[0059] In this embodiment, by providing a mounting base 502 on the muffler body 501, the muffler exhaust valve is easily installed on the muffler 5. Furthermore, the valve body 1 is detachably mounted on the mounting base 502. When the exhaust valve malfunctions or requires regular maintenance or replacement, the detachable connection allows maintenance personnel to easily remove the valve body 1 from the mounting base 502, significantly reducing maintenance difficulty and time.

[0060] Furthermore, as a specific embodiment, the exhaust port in this embodiment is a through hole, and the mounting base 502 is generally annular in shape surrounding the exhaust port. Each end of the mounting base 502 has a protruding protrusion 1011, and each protrusion 1011 has a connecting hole for connection with the valve body 1. Additionally, as a preferred embodiment, the mounting base 502 is specifically welded to the muffler body 501; however, other conventional connection methods are also feasible.

[0061] Combination Figure 9 and Figure 10 As shown in the diagram, in a preferred embodiment, the valve body 1 includes a valve body 101 with a vent hole, a central block 102 disposed within the vent hole, and a connecting rib 103 connecting the central block 102 and the valve body 101. The valve body 101 is connected to the muffler 5, the vent hole corresponds to the exhaust port, the valve 2 is slidably inserted into the central block 102, and the connecting rib 103 divides the vent hole into multiple sub-holes.

[0062] Furthermore, specifically, in combination Figure 6 and Figure 9 As shown, in this embodiment, the valve body 101 conforms to the mounting base 502. Both ends of the valve body 101 have lugs corresponding to the aforementioned protrusions 1011, and each lug has a mounting hole corresponding to the connection hole. For example... Figure 8 As shown, the valve body 101 can be mounted on the mounting base 502 by bolts 6 passing through the mounting holes and connection holes. It is understood that the number of protrusions 1011 and lugs is not limited to the two shown in the figure, and can be adjusted according to design requirements.

[0063] As a specific embodiment, such as Figure 9 and Figure 10 As shown, the central block 102 is annular, and four connecting ribs 103 are evenly distributed along the circumference of the central block 102. This design allows the annular central block 102 to provide stable and uniform sliding support for the valve 2. When the valve 2 slides back and forth along the central block 102, the supporting force and guiding effect are relatively consistent regardless of the angle position, which helps to ensure the smoothness and accuracy of the valve 2's opening and closing actions.

[0064] In addition, the annular structure allows the gas to flow around the central block 102 in a relatively uniform manner when passing through the vent, avoiding airflow turbulence that may occur due to irregular structure. This helps to maintain the stability of the gas pressure inside the muffler 5, thereby ensuring that the exhaust valve can work accurately according to the preset pressure threshold, which is beneficial to improving the reliability and stability of the entire exhaust system.

[0065] It should be noted that the number of connecting ribs 103 is not limited to the four shown in the figure, and can be adjusted according to design requirements.

[0066] As a further implementation method, combined with Figure 8 and Figure 9 As shown, the valve body 101 has a recessed platform 1012 surrounding the vent hole, and the recessed platform 1012 has an annular protrusion 10121 arranged circumferentially. The valve 2 is mounted on the recessed platform 1012 and abuts against the annular protrusion 10121. This arrangement allows the annular protrusion 10121 to limit the valve 2 circumferentially, accurately determining the position of the valve 2 on the horizontal plane, preventing the valve 2 from shifting or wobbling in the left-right or front-back directions after installation, and ensuring that the relative positional relationship between the valve 2, the vent hole, and the entire valve body 1 is always correct.

[0067] In addition, it also helps the valve 2 to slide smoothly on the central block 102, thereby facilitating reliable opening and closing actions and achieving effective control of the exhaust process. Moreover, compared to the structure where the entire recessed platform 1012 abuts against the valve 2, it can reduce the contact area between the annular protrusion 10121 and the valve 2, improve machining accuracy, and thus help ensure the sealing effect between the two.

[0068] Furthermore, as a further embodiment, the valve body 1 is provided with a sealing part for sealing the gap between the valve body 1 and the muffler 5. This sealing part prevents gas leakage from the gap between the valve body 1 and the muffler 5, helping to maintain a stable pressure environment inside the muffler 5. Moreover, it allows the exhaust valve to more accurately open and close the valve 2 according to a preset pressure threshold, avoiding malfunctions or failures due to unexpected pressure changes.

[0069] In one preferred embodiment, such as Figure 8 As shown, the sealing part of this embodiment includes a sealing groove 1013 provided on the valve body 1, and a sealing ring 4 provided within the sealing groove 1013. Furthermore, as... Figure 11 As shown, the sealing ring 4 in this embodiment is provided with limiting protrusions 401 on both the inner and outer sides. The limiting protrusions 401 protrude radially along the sealing ring 4 and abut against the groove wall of the sealing groove 1013 to restrict the sealing ring 4 from coming out of the sealing groove 1013.

[0070] The sealing part of this embodiment includes a sealing groove 1013 provided on the valve body 1 and a sealing ring 4 provided in the sealing groove 1013. The structure is simple and easy to design and implement. By providing a limiting protrusion 401 on the sealing ring 4 that abuts against the groove wall of the sealing groove 1013, it is beneficial to compress the limiting protrusion 401 so that it abuts tightly against the sealing groove 1013, which can play a good limiting role in the radial direction. As a result, the sealing ring 4 can be firmly kept in the sealing groove 1013, preventing it from accidentally coming out of the sealing groove 1013 under various external forces, such as vibration during vehicle operation and impact forces generated by pressure changes inside the exhaust system.

[0071] Furthermore, as a preferred embodiment, such as Figure 11 As shown, the limiting protrusions 401 on both the inner and outer sides of the sealing ring 4 are multiple and spaced apart along the circumference of the sealing ring 4. Furthermore, the limiting protrusions 401 on the inner and outer sides are staggered in the circumferential direction of the sealing ring 4. The advantage of this design is that the limiting protrusions 401 can limit the sealing ring 4 from multiple angles and positions, making it more securely held within the sealing groove 1013. Compared to the non-staggered arrangement, the staggered arrangement allows the sealing ring 4 to receive more uniform and comprehensive constraint at all positions in the circumferential direction, avoiding displacement or twisting of the sealing ring 4 within the sealing groove 1013 due to uneven local stress.

[0072] It should be noted that, in addition to providing limiting protrusions 401 on both the inner and outer sides of the sealing ring 4, it is also feasible to provide limiting protrusions 401 on either the inner or outer side of the sealing ring 4. In fact, it is also possible not to provide limiting protrusions 401 on the sealing ring 4.

[0073] In this embodiment, as a preferred implementation, such as Figure 12 As shown, valve 2 includes a valve body 201 and a guide post 202 disposed on the valve body 201. The valve body 201 is used to block the vent, and the guide post 202 is slidably inserted into the valve body 1, guiding the valve 2 to slide relative to the valve body 1. By including the valve body 201 and the guide post 202 slidably inserted into the valve body 201, the guide post 202 provides accurate path and direction constraints for the movement of valve 2, effectively preventing deviation or jamming during valve 2's movement, and ensuring the reliability and stability of the vent valve's operation.

[0074] As one specific embodiment, such as Figure 12As shown, the valve body 201 is circular, conforming to the shape of the vent hole. Additionally, the valve body 201 has a connecting post protruding to one side. A connecting hole is provided on the guide post 202, and the connecting post is screwed into the connecting hole, connecting the valve body 201 and the guide post 202 together. In this embodiment, the valve body 101 and the guide post 202 are connected by a screw connection. Compared to other connection methods (such as simple plug-in connections), the screw connection provides stronger connection force and positioning accuracy, allowing the guide post 202 to be installed more precisely and fixedly on the valve body 101. This creates favorable conditions for the valve 2 to slide smoothly and accurately along the guide post 202.

[0075] Furthermore, the screw connection facilitates the assembly and maintenance of the exhaust valve as a whole. However, during long-term use, the originally effective sealing may be affected. In this case, axially moving the connecting column relative to the guide column 202 and then retightening it changes the initial compression of the elastic element, thereby adjusting its preload. This ensures that the valve 2 remains pressed against the exhaust port, guaranteeing a proper seal. Of course, besides screwing the connecting column and guide column 202 together, interference fitting, welding, or integral molding are also feasible.

[0076] Continue to refer to Figure 12 As shown, to facilitate adjustment of the relative positions of the connecting post and the guide post 202, in a preferred embodiment, the end of the guide post 202 away from the valve body 201 is provided with an operating hole, which is adapted to accommodate external tools. As a specific embodiment, such as... Figure 12 As shown, the operating hole is a hexagonal hole. In this embodiment, by providing the operating hole, the operator can use the corresponding tools to insert into the operating hole, which facilitates the adjustment of the relative position between the connecting post and the guide post 202. It also facilitates disassembly and assembly, which helps to improve the overall disassembly and assembly efficiency of the exhaust valve and can reduce maintenance costs.

[0077] In addition, such as Figure 12 As shown in the diagram, in a preferred embodiment, the elastic part of this embodiment includes a spring 3 sleeved on the guide post 202. To prevent the spring 3 from dislodging from the guide post 202, a radially protruding ring is provided at the end of the guide post 202 furthest from the valve body 201, and one end of the spring 3 abuts against this protruding ring. Therefore, by screwing the connecting post to the operating guide post 202, it is also convenient to install the spring 3.

[0078] The elastic part of this embodiment includes a spring 3 sleeved on the guide post 202. Its structure is simple and easy to design and implement. Moreover, the spring 3 has good durability and repeatability, and can maintain relatively stable mechanical properties in multiple compression and rebound cycles.

[0079] In this embodiment, the muffler exhaust valve, by employing the above structure, ensures that when the pressure inside the muffler 5 is lower than a preset threshold, valve 2 blocks the exhaust port, thus providing a good seal for the muffler 5. This preset threshold should be less than the pressure resistance at the locking seam of the muffler 3. When the gas pressure inside the muffler 5 reaches the preset threshold, the strong gas pressure overcomes the elasticity of spring 3, pushing valve 2 upwards and opening the exhaust port. At this time, the high-pressure gas accumulated inside the muffler 5 will be discharged outwards through the opened exhaust port, effectively preventing the muffler 5 from bursting. Therefore, it effectively prevents the muffler 5 from bursting when the exhaust port is blocked.

[0080] Example 2

[0081] This embodiment relates to a muffler 5, which has the same structure as the muffler in Embodiment 1 above, and is equipped with the muffler exhaust valve of Embodiment 1 above.

[0082] In this embodiment, the muffler 5, by setting the muffler exhaust valve as described in Embodiment 1, can effectively prevent the muffler 5 from bursting due to excessive internal pressure, thus ensuring the normal operation of the muffler 5.

[0083] In addition, this embodiment also relates to a vehicle equipped with the muffler 5 as described above.

[0084] In this embodiment, by installing the muffler 5 as described above, the muffler 5 can be effectively prevented from cracking, reducing the risk of malfunction due to the muffler 5 and improving the overall vehicle quality.

[0085] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A muffler exhaust valve, characterized in that: It includes a valve body (1), a valve (2) slidably disposed on the valve body (1), and an elastic part disposed between the valve body (1) and the valve (2); The valve body (1) is installed at the exhaust port of the muffler (5). Under the action of the elastic part, the valve (2) blocks the exhaust port. When the gas pressure in the muffler (5) reaches a preset threshold, the valve (2) can be pushed to open the exhaust port and the elastic part can be compressed and stored.

2. The muffler exhaust valve according to claim 1, characterized in that: The valve (2) includes a valve body (201) and a guide post (202) disposed on the valve body (201); The valve body (201) is used to block the exhaust port, and the guide post (202) is slidably inserted on the valve body (1) and can guide the valve (2) to slide relative to the valve body (1).

3. The muffler exhaust valve according to claim 2, characterized in that: The elastic part includes a spring (3) sleeved on the guide post (202); and / or, The guide post (202) has an operating hole at one end away from the valve body (201), and the operating hole is adapted to be used with external tools.

4. The muffler exhaust valve according to claim 2, characterized in that: The valve body (201) has a connecting post protruding to one side, and the guide post (202) is provided with a connecting hole; The connecting post is screwed into the connecting hole and connects the valve body (201) to the guide post (202).

5. The muffler exhaust valve according to claim 1, characterized in that: The valve body (1) includes a valve body body (101) with a vent hole, a central block (102) disposed in the vent hole, and a connecting rib (103) connecting the central block (102) and the valve body body (101). The valve body (101) is connected to the silencer (5), the vent is provided corresponding to the exhaust port, and the valve (2) is slidably inserted on the center block (102).

6. The muffler exhaust valve according to claim 5, characterized in that: The valve body (101) is provided with a recessed platform (1012) surrounding the vent hole, and the recessed platform (1012) has an annular protrusion (10121) arranged along its circumference. The valve (2) is located on the platform (1012) and abuts against the annular protrusion (10121).

7. The muffler exhaust valve according to claim 1, characterized in that: The valve body (1) is provided with a sealing part, which is used to seal the gap between the valve body (1) and the muffler (5).

8. The muffler exhaust valve according to claim 7, characterized in that: The sealing part includes a sealing groove (1013) provided on the valve body (1) and a sealing ring (4) provided in the sealing groove (1013); The sealing ring (4) has a limiting protrusion (401) on its inner side and / or outer side. The limiting protrusion (401) protrudes radially along the sealing ring (4) and abuts against the groove wall of the sealing groove (1013) to restrict the sealing ring (4) from coming out of the sealing groove (1013).

9. A silencer, characterized in that: The muffler is provided with a muffler exhaust valve as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is equipped with the muffler as described in claim 9.

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