Exhaust tail throat, noise elimination structure and vehicle

Abstract

The utility model provides an exhaust tail throat, a noise elimination structure and a vehicle, and belongs to the technical field of vehicle exhaust systems.The exhaust tail throat is provided with a color changing ring, when the temperature of a tail throat body rises to a high-temperature state, the color changing ring is changed into striking red or orange from light color, high-temperature warning is achieved, and scalding caused by mistaken touch is effectively prevented; the containing cavity is formed in the tail throat body, the exposed notch is formed in the rear end of the containing cavity, the color-changing ring is embedded in the tail throat body, the stable display function of the color-changing ring is ensured, the effect of protecting the color-changing ring is achieved, stability and durability are improved, the color change of the color-changing ring is compared with the metal texture of the tail throat body, and the color-changing effect of the color-changing ring is improved. The exhaust tail throat is endowed with science and technology sense and layering sense, and the appearance coordination of the whole automobile is improved. By arranging the elastic pushing piece, continuous backward elastic pushing force is formed on the color-changing ring, so that the color-changing ring tightly abuts against the cavity rear wall all the time, and it is ensured that the position of the color-changing ring is stable.

Description

Technical Field

[0001] This application belongs to the field of vehicle exhaust system technology, and more specifically, relates to an exhaust tailpipe, a muffler structure, and a vehicle. Background Technology

[0002] A car exhaust tailpipe is an exposed component installed at the end of a car's exhaust system. It is usually connected to the outlet end of the exhaust pipe and mainly serves to guide exhaust gases out, protect the end of the exhaust pipe from external environmental corrosion, and beautify the appearance of the rear of the vehicle.

[0003] Because the exhaust tailpipe directly receives the high-temperature exhaust gases from the engine, its surface temperature rises rapidly during vehicle operation, especially when the vehicle has just stopped or is in a hot state. The surface temperature of the tailpipe can reach a level that can cause burns. During routine user contact or maintenance by repair personnel, particularly when working on the rear of the vehicle and surrounding components of the exhaust system, accidental contact can easily lead to burns, posing a serious safety hazard. Utility Model Content

[0004] The purpose of this application is to provide an exhaust tailpipe, a muffler structure, and a vehicle, which aims to solve the technical problem of burn accidents caused by accidental contact with a high-temperature exhaust tailpipe in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, an exhaust tailpipe is provided, comprising:

[0006] The tailpipe body has an exhaust chamber and a receiving cavity located around the exhaust chamber. The front end of the exhaust chamber is connected to the vehicle's exhaust pipe, and the rear end of the receiving cavity has an exposure notch.

[0007] A color-changing ring is disposed within the receiving cavity and is positioned corresponding to the exposure notch, so that the color of the color-changing ring can be observed through the exposure notch.

[0008] Existing exhaust tailpipes generally lack effective high-temperature warning signs. During daily use or maintenance, users cannot intuitively judge the temperature of the exhaust tailpipe, which can easily lead to burns due to accidental contact with the high-temperature surface, posing a significant safety hazard.

[0009] The color-changing ring's temperature sensitivity allows it to change color according to the temperature of the tailpipe. When the temperature of the tailpipe rises to a certain level, the color-changing ring changes from colorless or light-colored to a striking color such as red or orange, forming a dynamic warning sign.

[0010] The beneficial effects of the exhaust tailpipe provided by this utility model are as follows: Compared with the prior art, the exhaust tailpipe of this utility model sets a receiving cavity in the tailpipe body, sets a color-changing ring in the receiving cavity, and uses an exposed notch set at the rear end of the receiving cavity to expose the rear end face of the color-changing ring. When the temperature of the tailpipe body rises to a high temperature, the color-changing ring changes from light color to a conspicuous red or orange, realizing a high temperature warning, effectively preventing accidental burns, and improving the safety of operation.

[0011] In addition, the design of the receiving cavity and the exposed notch allows the color-changing ring to be embedded, which not only protects the color-changing ring and improves its stability and durability, but also contrasts the color change of the color-changing ring with the metallic texture of the exhaust tailpipe body, giving the exhaust tailpipe a sense of technology and layering, and improving the overall appearance harmony of the vehicle.

[0012] In conjunction with the first aspect, in one possible implementation, the exhaust tailpipe further includes:

[0013] An elastic pusher is disposed within the receiving cavity and connected to the color-changing ring. The elastic pusher is configured with a preload force that causes the color-changing ring to press against the exposed notch.

[0014] The width of the exposed notch is smaller than the ring width of the color-changing ring, so as to restrict the displacement of the color-changing ring in the opening direction of the exposed notch.

[0015] By setting the elastic pusher and limiting the width of the exposed notch, bidirectional limiting and adaptive compensation of the color-changing ring are achieved, ensuring that the rear end face of the color-changing ring is always aligned with and pressed against the exposed notch, thus avoiding the warning screen from shifting or becoming incomplete.

[0016] In conjunction with the first aspect, in one possible implementation, the resilient pusher includes:

[0017] An elastic element, connected to the cavity sidewall of the receiving cavity; and

[0018] A push plate is connected to the elastic element, and the rear end face of the push plate abuts against the color-changing ring.

[0019] The push plate can more evenly transmit the elastic pushing force of the elastic element to the front end face of the color-changing ring, avoiding the problem of color-changing ring skewness and ensuring that its display end face is always aligned with the exposed notch, preventing the warning area from shifting. The push plate increases the area of ​​action of the elastic force, reducing the risk of the thermochromic ceramic color-changing ring breaking due to local stress concentration. In addition, the buffering characteristics of the elastic element can also absorb the vibration energy of the vehicle, reduce the hard collision between the color-changing ring and the cavity wall, and adapt to the thermal deformation of the tailpipe body during long-term use, which helps to extend the service life of the overall structure.

[0020] In some embodiments, the push plate is provided with a rearward-facing positioning groove, and the front end of the color-changing ring is inserted into the positioning groove.

[0021] The insertion and engagement of the positioning groove with the front end of the color-changing ring, combined with the concentric design of the push plate, can significantly reduce the radial displacement error of the color-changing ring, ensuring that it always remains coaxial with the receiving cavity and the exposed notch, avoiding misalignment of the rear end face of the color-changing ring with the exposed notch due to vibration or assembly errors, and ensuring the complete display of the high temperature warning area.

[0022] In conjunction with the first aspect, in one possible implementation, the tail throat body includes:

[0023] An inner pipe section, connected to the exhaust pipe, has a first flange bent outwards at its rear end, and the elastic pusher is connected to the first flange; and

[0024] The outer tube section includes an outer sleeve, an inner sleeve, and a bent portion connecting the outer sleeve and the inner sleeve. The outer sleeve, the inner sleeve, and the bent portion enclose the receiving cavity. The outer sleeve is fitted around the outer periphery of the inner tube section, and the front end of the inner sleeve is connected to the first flange.

[0025] The inner cavity of the inner tube section and the inner cavity of the embedded part are connected to form the exhaust chamber; the exposed notch is provided on the bend.

[0026] The tailpipe body is designed as a separate structure with inner and outer pipe sections, allowing the elastic pusher and color-changing ring to be assembled independently of the two pipe sections, reducing assembly difficulty and improving assembly efficiency. The first flange serves as the connection reference between the inner and outer pipe sections and also provides a stable support for the elastic pusher. The bend on the outer pipe section creates an inner and outer spaced outer sleeve and inner insert, forming a cavity for the color-changing ring to be installed. The connection between the inner insert and the inner pipe section forms a continuous exhaust chamber, ensuring a smooth exhaust gas flow path.

[0027] In some embodiments, the front end of the embedded portion is provided with an outwardly bent second flange, which is fitted and connected to the first flange.

[0028] During the installation phase, the second flange is used to abut the embedded part against the first flange to form a preliminary positioning, ensuring that the outer pipe section and the inner pipe section are in a coaxial state. This indirectly ensures the alignment accuracy of the exposed notch and the rear end face of the color-changing ring, greatly reducing the alignment difficulty during the installation process and speeding up the installation process.

[0029] In conjunction with the first aspect, in one possible implementation, the receiving cavity is annular, and multiple exposure notches are provided at circumferential intervals along the tail throat body, each of the exposure notches extending in an arc along the circumferential direction of the tail throat body.

[0030] The evenly distributed, arc-shaped exposed notches create a symmetrical rhythm, visually echoing the ring structure of the exhaust tip and enhancing the sophistication and technological feel of the rear design. As the color-changing ring changes with temperature, multiple arc-shaped windows simultaneously display a color gradient, creating a more dynamic visual impact and organically unifying functional warnings with the overall design, satisfying users' demands for aesthetic detail.

[0031] Secondly, this application embodiment also provides a muffler structure, including the aforementioned exhaust tailpipe, exhaust pipe and muffler, wherein the exhaust tailpipe is connected to the tail end of the exhaust pipe, the muffler is connected to the exhaust pipe, and the exhaust pipe is connected to the vehicle's exhaust system.

[0032] The beneficial effects of the muffler structure provided by this utility model are as follows: Compared with the prior art, the muffler structure of this utility model achieves a comprehensive noise reduction effect when the vehicle's exhaust system discharges exhaust gas through the exhaust pipe and exhaust tailpipe; in addition, when the exhaust tailpipe is in a high temperature state, the color-changing ring can display a striking red or orange color, realizing a high temperature warning and effectively preventing burns caused by accidental contact; moreover, the color change of the color-changing ring gives the exhaust tailpipe a sense of technology and layering, enhancing the overall aesthetics of the vehicle.

[0033] In conjunction with the second aspect, in one possible implementation, two exhaust pipes are symmetrically arranged, and a muffler is disposed between the two exhaust pipes. The muffler has two air inlets and two air outlets. Each exhaust pipe is connected to the air inlet through an air inlet pipe, and each exhaust pipe is connected to the air outlet through an air outlet pipe. The air inlet pipe and the air outlet pipe are arranged at intervals along the exhaust gas discharge direction.

[0034] The two exhaust pipes are symmetrically arranged to form a dual-flow structure, which can divide the exhaust gas discharged from the vehicle engine into two parallel flows, reduce exhaust back pressure, reduce the residence time of exhaust gas in the engine cylinder, and improve engine intake efficiency.

[0035] Thirdly, embodiments of this application also provide a vehicle including the aforementioned noise reduction structure.

[0036] The beneficial effects of the vehicle provided by this utility model are the same as those of the aforementioned noise reduction structure, and will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the sound-absorbing structure provided in the embodiments of this application;

[0039] Figure 2 Examples of this application Figure 1 A partial structural diagram of the A-axis direction;

[0040] Figure 3 A cross-sectional view of the exhaust tailpipe provided in an embodiment of this application;

[0041] Figure 4 for Figure 3 Enlarged structural diagram of section B;

[0042] Figure 5 for Figure 4 A schematic diagram of another embodiment;

[0043] Figure 6 for Figure 4 A schematic diagram of another embodiment.

[0044] In the picture:

[0045] 10. Exhaust tailpipe; 1. Tailpipe body; 11. Exhaust chamber; 12. Receiving chamber; 121. Filler; 13. Exposed notch; 14. Inner pipe section; 141. First flange; 142. Extension; 15. Outer pipe section; 151. Outer sleeve; 152. Embedded part; 153. Bending part; 154. Second flange; 2. Color-changing ring; 3. Elastic pusher; 31. Elastic element; 32. Pusher plate; 321. Positioning groove;

[0046] 20. Silencing structure; 201. Exhaust pipe; 202. Silencer; 203. Intake pipe; 204. Outlet pipe; 205. Connecting pipe; 206. Hook; 207. Noise valve. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0048] It should be noted that when an element is referred to as being "located" on another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application 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 application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] It should be noted that the directions or positional relationships indicated by "front", "rear", "up", and "down" in this embodiment are based on the vehicle's own orientation. Specifically, the front of the vehicle represents "front", the rear of the vehicle represents "rear", the top of the vehicle represents "up", and the bottom of the vehicle represents "down".

[0051] As the final component of a vehicle's exhaust system, the exhaust tailpipe is directly exposed at the rear of the vehicle and is a key component that combines functionality and aesthetics. Its core function is to guide exhaust gases out, optimize the visual effect of the vehicle's rear through design, and at the same time, to some extent, help improve the performance of the exhaust system.

[0052] In existing technologies, exhaust tailpipes are mostly made of ordinary steel, which has good thermal conductivity. When the high-temperature exhaust gas from the engine (temperatures typically reach 300-800℃, and even higher in some performance vehicles) flows through the exhaust tailpipe, the large amount of heat carried by the exhaust gas is quickly transferred to the metal substrate of the exhaust tailpipe through thermal conduction. Due to the high thermal conductivity of metal materials, heat can quickly diffuse inside the exhaust tailpipe, causing the surface temperature of the exhaust tailpipe to rise synchronously with the exhaust gas temperature. Even after the engine stops running, the heat stored in the exhaust tailpipe will be slowly released through its metal surface, causing it to maintain a high temperature for a considerable period of time.

[0053] The inventors discovered that existing exhaust tailpipes generally lack effective high-temperature warning signs. They lack visual signals such as color or patterns to indicate their high-temperature status, and there are no other markings that allow maintenance personnel to quickly identify the risk of high temperatures. During daily use (such as cleaning the vehicle) or maintenance operations, users cannot visually determine whether the exhaust tailpipe is hot, making them highly susceptible to burns from accidental contact with hot surfaces, posing a significant safety risk.

[0054] In terms of exterior design, as the automotive industry continues to raise its requirements for the overall aesthetic coordination of vehicles, the simple styling of traditional exhaust tailpipes is no longer able to match the needs of modern vehicle exterior upgrades. Their static visual effect contrasts sharply with the overall technological and design sense of the vehicle, affecting the overall visual coordination and aesthetics of the vehicle.

[0055] To resolve the above technical issues, please refer to the following: Figures 1 to 6 The present application provides a description of an exhaust tailpipe, a muffler structure, and a vehicle. The exhaust tailpipe 10 includes a tailpipe body 1 and a color-changing ring 2. The tailpipe body 1 has an exhaust chamber 11 and a receiving cavity 12 located on the outer periphery of the exhaust chamber 11. The front end of the exhaust chamber 11 is connected to the exhaust pipe 201 of the vehicle. The rear end of the receiving cavity 12 has an exposure notch 13. The color-changing ring 2 is located in the receiving cavity 12 and is correspondingly arranged with the exposure notch 13 so that the color of the color-changing ring 2 can be observed through the exposure notch 13.

[0056] It should be noted that the front-back direction in this application is along the exhaust direction. "Front" refers to the direction in which the exhaust gas comes from and "rear" refers to the direction in which the exhaust gas goes out. In a specific embodiment, "front" is the same as the direction of the front of the vehicle and "rear" is the same as the direction of the rear of the vehicle.

[0057] It is important to understand that the color-changing ring 2 is sensitive to temperature and changes color with the temperature of the tailpipe body 1. When the temperature of the tailpipe body 1 rises to a certain level, the color-changing ring 2 can change from a light color such as colorless or gray to a bright color such as red or orange to serve as a warning and to remind the user in real time that the tailpipe body 1 is in a high-temperature state and that direct contact may cause burns.

[0058] The exhaust tailpipe provided in this application, compared with the prior art, provides a receiving cavity 12 in the tailpipe body 1, a color-changing ring 2 in the receiving cavity 12, and uses an exposure notch 13 at the rear end of the receiving cavity 12 to expose the rear end face of the color-changing ring 2. When the temperature of the tailpipe body 1 rises to a high temperature, the color-changing ring 2 changes from light color to a bright red or orange, realizing a high temperature warning, effectively preventing accidental burns, and improving the safety of operation.

[0059] In addition, the arrangement of the receiving cavity 12 and the exposed notch 13 allows the color-changing ring 2 to be embedded, which not only protects the color-changing ring 2 and improves its stability and durability, but also makes the color change of the color-changing ring 2 contrast with the metallic texture of the exhaust tailpipe body 1, giving the exhaust tailpipe 10 a sense of technology and layering, and improving the overall appearance coordination of the vehicle.

[0060] In this embodiment, the exhaust chamber 11 serves as the main channel for exhaust gas flow, ensuring that the exhaust function of the vehicle exhaust pipe 201 is not interfered with.

[0061] The receiving cavity 12 is located on the outer periphery of the exhaust cavity 11, forming a physical isolation space, providing a reliable mounting carrier for the color-changing ring 2. This prevents the color-changing ring 2 from directly contacting the high-temperature exhaust gas flow, and allows it to receive temperature signals only through the heat conduction of the tailpipe body 1. This avoids the erosion of the color-changing ring 2 by the exhaust gas impact, and can accurately reflect the overall temperature of the tailpipe body 1, thus improving the stability of temperature sensing.

[0062] The exposed notch 13 is located at the rear end of the receiving cavity 12 and extends through the rear end face of the tailpipe body 1, exposing only the rear end face of the color-changing ring 2. This ensures that users can directly observe the color-changing state and understand the temperature status of the tailpipe body 1. On the other hand, it reduces the contact area between the color-changing ring 2 and the external environment, reducing damage to the color-changing ring 2 from rain, sunlight, and impacts. At the same time, it maintains the integrity of the side circumference of the tailpipe body 1, taking into account both functionality and aesthetics.

[0063] The receiving cavity 12 and the color-changing ring 2 can adopt a ring structure or multiple spaced arc structures, preferably an integral ring structure.

[0064] In this embodiment, the color-changing ring 2 is a rigid component that can be stably set within the receiving cavity 12. Specifically, the color-changing ring 2 can be made with a stainless steel ring as a rigid base and an inorganic thermosensitive pigment sprayed on the surface as a coating, such as a vanadium-doped titanium dioxide composite pigment, which is silver-gray when cold and turns bright yellow when the temperature reaches 120°C.

[0065] The color-changing ring 2 can also be an integrated thermochromic ceramic ring, which is based on the characteristic of reversible transformation of crystal phase structure. It can achieve stable and reversible color change when the temperature of the tail throat body 1 changes. For example, zirconia-based ceramics are light-colored or transparent when cold, gradually turn orange at 80℃, and gradually turn red at 120℃.

[0066] When the color-changing ring 2 adopts a thermochromic ceramic ring, its high-temperature iridescent gradient effect can be used to further enhance the vehicle's refined perception and dynamic visual performance, and improve the aesthetic design. At the same time, the thermochromic ceramic ring can withstand long-term high temperature, vibration and corrosive environment, ensuring the accuracy and long-term effectiveness of high temperature warning, and its service life can be matched with that of the exhaust pipe body 1.

[0067] A modified embodiment of the exhaust tailpipe 10 described above is shown below. Figure 3 The exhaust tailpipe 10 also includes an elastic pusher 3, which is disposed in the receiving cavity 12 and connected to the color-changing ring 2. The elastic pusher 3 is configured with a pre-tightening force to press the color-changing ring 2 against the exposure notch 13. The width of the exposure notch 13 is smaller than the ring width of the color-changing ring 2, so as to limit the displacement of the color-changing ring 2 in the opening direction of the exposure notch 13.

[0068] The elastic pusher 3 is disposed within the receiving cavity 12 and connected to the front end of the color-changing ring 2, forming a continuous rearward elastic pusher force on the color-changing ring 2, ensuring that the rear end face of the color-changing ring 2 is always tightly abutted against the rear wall of the cavity. When the vehicle vibrates, the tailpipe body 1 expands / contracts due to heat, or the color-changing ring 2 deforms due to heat, the elastic deformation of the elastic pusher 3 can compensate for the displacement change, thereby ensuring the stability of the position of the color-changing ring 2.

[0069] The exposure notch 13 is provided on the rear wall of the receiving cavity 12 and extends through the rear end face of the tail throat body 1. By limiting the width of the exposure notch 13 to be smaller than the ring width of the color-changing ring 2, the rear wall of the receiving cavity 12 can be used to directly form an axial limit on the color-changing ring 2, preventing the color-changing ring 2 from coming out of the exposure notch 13. At the same time, the exposure notch 13 only exposes part of the rear end face of the color-changing ring 2, taking into account both high temperature status display and functional stability.

[0070] By setting the elastic pusher 3 and limiting the width of the exposed notch 13, bidirectional positioning and adaptive compensation of the color-changing ring 2 are achieved, ensuring that the rear end face of the color-changing ring 2 is always aligned with and pressed against the exposed notch 13, avoiding the warning screen from shifting or becoming incomplete; at the same time, it can also reduce the entry of external impurities into the receiving cavity 12 through the exposed notch 13; in addition, the continuous action of the elastic force of the elastic pusher 3 can also buffer the compression of the color-changing ring 2 by the thermal expansion and contraction of the tail throat body 1, protecting the color-changing ring 2 made of thermochromic ceramic ring from cracking, and significantly improving the reliability under extreme working conditions.

[0071] Specifically, the elastic pusher 3 can be a helical spring, a high-temperature resistant rubber ring, or a structure of multiple stacked butterfly springs. This embodiment does not limit the specific implementation of the elastic pusher 3, as long as the position of the color-changing ring 2 can be kept stable by the elastic force.

[0072] For example, a smooth protrusion can be further provided on the rear end face of the color-changing ring 2, so that the protrusion extends into the exposure notch 13. This not only helps to increase the visibility range of the warning state, but also utilizes the rear wall of the receiving cavity 12 and the inner peripheral wall of the exposure notch 13 to form a double limiting effect on the color-changing ring 2 in the axial and radial directions, further increasing the stability of the position of the color-changing ring 2.

[0073] In some embodiments, the aforementioned elastic pusher 3 may be adopted as follows: Figure 4The structure shown. See also Figure 4 The elastic pusher 3 includes an elastic element 31 and a pusher plate 32. The elastic element 31 is connected to the cavity sidewall of the receiving cavity 12. The pusher plate 32 is connected to the elastic element 31, and the rear end face of the pusher plate 32 abuts against the color-changing ring 2.

[0074] The elastic element 31 can be a structure of one helical spring or multiple stacked butterfly springs concentrically arranged in the receiving cavity 12; or it can be in the form of multiple helical springs, which are arranged at intervals along the circumference of the receiving cavity 12 to form a multi-point elastic push.

[0075] This embodiment adopts Figure 4 As shown in the structure, the elastic element 31 is a helical spring concentrically sleeved on the outer periphery of the exhaust chamber 11, which helps to simplify the installation operation and can provide a uniform axial elastic thrust. The front end of the elastic element 31 is fixed on the side wall of the receiving chamber 12.

[0076] The push plate 32 is positioned between the elastic element 31 and the color-changing ring 2, and is coaxially arranged with the color-changing ring 2 within the receiving cavity 12. This allows the elastic pushing force of the elastic element 31 to be transmitted more evenly to the front end face of the color-changing ring 2, preventing the color-changing ring 2 from tilting, jamming, or even breaking due to localized stress. Specifically, the front end face of the push plate 32 is fixedly connected to the elastic element 31 to ensure stable force distribution.

[0077] The concentric layout of the elastic element 31 and the surface contact of the push plate 32 ensure that the elastic push force is applied evenly to the color-changing ring 2, avoiding the problem of the color-changing ring 2 being skewed, ensuring that its display end face is always aligned with the exposed notch 13, and preventing the warning area from shifting. The push plate 32 increases the area of ​​action of the elastic force, reducing the risk of the thermochromic ceramic color-changing ring 2 breaking due to local stress concentration. In addition, the buffering characteristics of the elastic element 31 can also absorb the vibration energy of the vehicle, reduce the hard collision between the color-changing ring 2 and the cavity wall of the receiving cavity 12, and adapt to the thermal deformation of the tailpipe body 1 during long-term use, which helps to extend the service life of the overall structure.

[0078] In some embodiments, the push plate 32 described above can be as follows: Figure 4 The structure shown. See also Figure 4 The push plate 32 is provided with a positioning groove 321 with the opening facing backward, and the front end of the color-changing ring 2 is inserted into the positioning groove 321.

[0079] The positioning groove 321 is inserted into the front end of the color-changing ring 2, and combined with the concentric design of the push plate 32, the radial displacement error of the color-changing ring 2 can be significantly reduced, ensuring that it always remains coaxial with the receiving cavity 12 and the exposed notch 13, avoiding misalignment of the rear end face of the color-changing ring 2 and the exposed notch 13 due to vibration or assembly errors, and ensuring the complete display of the high temperature warning area.

[0080] In addition, the positioning groove 321 serves as an assembly reference, which can guide the color-changing ring 2 to be quickly inserted into place without the need for additional tooling calibration, thus shortening the assembly time. Furthermore, the insertion depth can be used to intuitively determine whether the installation is in place, reducing human error.

[0081] Optionally, the positioning groove 321 can be set as a tapered cross section with a wide port and a narrow bottom. Correspondingly, a tapered boss is provided at the front end of the color-changing ring 2. By utilizing the self-centering characteristic of the tapered surface, radial deviation during assembly can be further eliminated to ensure assembly accuracy.

[0082] In some embodiments, the tail throat body 1 described above can be as follows: Figure 3 and Figure 4 The structure shown. See also Figure 3 and Figure 4 The tailpipe body 1 includes an inner pipe section 14 and an outer pipe section 15. The inner pipe section 14 is connected to the exhaust pipe 201. The rear end of the inner pipe section 14 is provided with an outwardly bent first flange 141. An elastic pusher 3 is connected to the first flange 141. The outer pipe section 15 includes an outer sleeve 151, an inner part 152, and a bent part 153 connecting the outer sleeve 151 and the inner part 152. The outer sleeve 151, the inner part 152, and the bent part 153 enclose a receiving cavity 12. The outer sleeve 151 is fitted around the inner pipe section 14. The front end of the inner part 152 is connected to the first flange 141. The inner cavity of the inner pipe section 14 and the inner cavity of the inner part 152 communicate to form an exhaust cavity 11. An exposed notch 13 is provided on the bent part 153.

[0083] The tailpipe body 1 is configured as a separate structure of inner pipe section 14 and outer pipe section 15, allowing the elastic pusher 3 and the color-changing ring 2 to be assembled independently of the two pipe sections. For example, the elastic pusher 3 can be directly installed by plane positioning of the first flange 141, and the color-changing ring 2 can be precisely placed using the open space at the rear end of the inner pipe section 14. Then, the inner pipe section 14 and the outer pipe section 15 are connected as one unit, reducing assembly difficulty and improving assembly efficiency.

[0084] The first flange 141 serves as the connection reference between the inner pipe section 14 and the outer pipe section 15, and also provides a stable support carrier for the elastic jacking member 3. The bend 153 on the outer pipe section 15 causes the outer sleeve 151 and the inner insert 152 to be spaced apart, forming a receiving cavity 12 for the installation of the color-changing ring 2, and forming a continuous exhaust cavity 11 through the connection between the inner insert 152 and the inner pipe section 14, ensuring a smooth exhaust gas flow path.

[0085] The bent portion 153 transitions arc-shaped from the rear end of the outer sleeve portion 151 to the rear end of the inner portion 152, serving as the rear end face of the tail throat body 1 and enhancing the overall aesthetics. Simultaneously, the bent portion 153 acts as the opening carrier for the exposed notch 13 and as the rear end limiter for the color-changing ring 2. Combined with the pushing force of the elastic pusher 3, it enables the color-changing ring 2 to float and be fixed axially within the receiving cavity 12, adapting to dimensional changes caused by thermal expansion and contraction.

[0086] Based on the above structure, the specific installation process of the exhaust tailpipe 10 is as follows: Taking the first flange 141 of the inner pipe section 14 as the installation reference surface, the front end face of the elastic pusher 3 is fixed to the rear end face of the first flange 141, ensuring that the elastic pusher 3 and the inner pipe section 14 are concentric; the color-changing ring 2 is connected to the rear end of the elastic pusher 3, and at the same time, the outer pipe section 15 is inserted from the rear end of the inner pipe section 14, so that the color-changing ring 2 and the elastic pusher 3 enter the receiving cavity 12 synchronously, ensuring that the rear end face of the color-changing ring 2 is aligned with the exposed notch 13 on the bent part 153; then, the front end face of the embedded part 152 is attached to the first flange 141 and fixedly connected. At this time, the elastic pusher 3 should be in a pre-compressed state to provide installation pre-tightening force for the color-changing ring 2. Finally, the front end of the inner pipe section 14 is fixedly connected to the end of the vehicle's exhaust pipe 201, and it is ensured that the exhaust chamber 11 and the inner cavity of the exhaust pipe 201 are coaxially connected.

[0087] In this embodiment, during the above installation process, the inner part 152 and the first flange 141, as well as the inner pipe section 14 and the exhaust pipe 201 are fixedly connected by welding to ensure the structural stability of the exhaust tailpipe 10.

[0088] Specifically, the inner pipe section 14 is flared at the rear end, which can reduce exhaust resistance and ensure the stability of exhaust airflow according to the principles of fluid mechanics. It can also optimize acoustic characteristics, suppress high-frequency noise, and adjust the sound quality.

[0089] The front end face of the outer pipe section 15 and the inner pipe section 14 can be designed as an opening to accommodate exhaust pipes 201 of different diameters; or the opening can be closed by an arc plate to reduce airflow resistance when the vehicle is in motion.

[0090] See some possible embodiments. Figure 5 The outer edge of the first flange 141 is provided with a backward-bent extension 142. The extension 142 surrounds the outer periphery of the elastic pusher 3 and can be used to perform preliminary radial positioning of the elastic pusher 3, which facilitates the connection operation between the elastic pusher 3 and the inner tube section 14.

[0091] Further, see Figure 6The outer edge of the extension 142 can be extended horizontally backward, so that the inner peripheral wall of the extension 142 and the outer peripheral wall of the embedded part 152 form an annular space that allows the elastic pusher 3 to slide linearly, providing reliable guidance for the extension and retraction of the elastic pusher 3, thereby ensuring that the color-changing ring 2 can always be aligned with the exposed notch 13 when it expands and contracts due to heat, thus ensuring the stability of the high temperature warning function.

[0092] Furthermore, a filler 121 can be provided in the receiving cavity 12, and the color-changing ring 2 is provided through the filler 121. When the color-changing ring 2 expands and contracts due to temperature changes, the deformation of the filler 121 can be absorbed or released by its own deformation. At the same time, it provides radial support for the axial displacement of the color-changing ring 2, ensuring the alignment accuracy between the rear end face of the color-changing ring 2 and the exposed notch 13, and maintaining the stability of the high temperature warning.

[0093] Specifically, the filler 121 needs to be made of a high-temperature resistant flexible material, such as high-temperature resistant silicone or ceramic fiber cotton.

[0094] Please see Figure 4 Based on the above embodiments, the front end of the embedded part 152 is provided with an outwardly bent second flange 154, and the second flange 154 is attached to the first flange 141.

[0095] During the installation phase, the second flange 154 is used to abut the embedded part 152 against the first flange 141 to form a preliminary positioning, ensuring that the outer pipe section 15 and the inner pipe section 14 are in a coaxial state, avoiding radial misalignment caused by the placement of the embedded part 152, and indirectly ensuring the alignment accuracy of the exposed notch 13 and the rear end face of the color-changing ring 2, greatly reducing the alignment difficulty in the installation process and speeding up the installation process.

[0096] It should be noted that the outer edge of the second flange 154 is located inside the elastic pusher 3 to avoid the second flange 154 interfering with the position of the elastic pusher 3 that is already installed on the first flange 141, and to ensure that the elastic pusher 3 can properly push the color-changing ring 2 backward.

[0097] In some embodiments, the aforementioned exposure gap 13 can be adopted as follows: Figure 2 The structure shown. See also Figure 2 The receiving cavity 12 is annular, and multiple exposure notches 13 are provided at intervals along the circumference of the tail throat body 1. Each exposure notch 13 extends in an arc along the circumference of the tail throat body 1.

[0098] The shape of the exposed notch 13, extending in a circumferential arc, naturally conforms to the annular structure of the tail throat body 1. Within the limited space of the bend 153, the display length of a single exposed notch 13 can be maximized, ensuring that the color change of the color-changing ring 2 is more easily identified. At the same time, the spaced distribution of multiple exposed notches 13 ensures that there is a solid connection between adjacent exposed notches 13 and the bend 153, which can prevent the rigidity of the bend 153 from decreasing due to too many or too long exposed notches 13, thus ensuring the protective function of the receiving cavity 12 for the color-changing ring 2.

[0099] The evenly distributed arc-shaped exposed notches 13 create a symmetrical rhythm, visually echoing the annular structure of the tailpipe body 1, enhancing the sophistication and technological feel of the tail design. When the color-changing ring 2 changes with temperature, multiple arc-shaped windows simultaneously display a color gradient, creating a more dynamic visual impact and organically unifying functional warnings with the exterior design, satisfying users' needs for detailed aesthetics.

[0100] Based on the same inventive concept, see [link to inventive concept] Figure 1 This application embodiment also provides a muffler structure 20, including the aforementioned exhaust tailpipe 10, exhaust pipe 201 and muffler 202. The exhaust tailpipe 10 is connected to the tail end of the exhaust pipe 201, the muffler 202 is connected to the exhaust pipe 201, and the exhaust pipe 201 is connected to the vehicle's exhaust system.

[0101] Compared with the prior art, the muffler structure 20 provided by this utility model achieves a comprehensive noise reduction effect when the vehicle's exhaust system discharges exhaust gas through the exhaust pipe 201 and the exhaust tailpipe 10, using the muffler 202 on the exhaust pipe 201. At the same time, through the exhaust tailpipe 10 at the tail end of the two exhaust pipes 201, when the exhaust tailpipe 10 is in a high temperature state, the color-changing ring 2 can display a striking red or orange color, realizing a high temperature warning and effectively preventing burn accidents caused by accidental contact. Moreover, the color change of the color-changing ring 2 gives the exhaust tailpipe 10 a sense of technology and layering, enhancing the overall aesthetics of the vehicle.

[0102] The muffler 202 has a silencing chamber inside. The structure of the silencing chamber can adopt the existing silencing chamber structure, as long as it can achieve silencing when exhaust gas is discharged from the exhaust pipe 201.

[0103] In some possible embodiments, two exhaust pipes 201 are symmetrically arranged, and a muffler 202 is arranged between the two exhaust pipes 201. The muffler 202 has two air inlets and two air outlets. Each exhaust pipe 201 is connected to the air inlet through an air inlet pipe 203, and each exhaust pipe 201 is connected to the air outlet through an air outlet pipe 204. The air inlet pipe 203 and the air outlet pipe 204 are arranged at intervals along the exhaust direction of the exhaust gas.

[0104] The two exhaust pipes 201 are symmetrically arranged to form a dual-flow structure, which can divide the exhaust gas discharged from the vehicle engine into two parallel flows, reduce exhaust back pressure, reduce the residence time of exhaust gas in the engine cylinder, and improve engine intake efficiency.

[0105] Specifically, the muffler 202 has two parallel and independent silencing chambers. Each silencing chamber has an independent air inlet and air outlet. Taking one of the exhaust pipes 201 as an example, the exhaust pipe 201 can be divided into a front section and a rear section along the exhaust direction. The exhaust gas in the front section of the exhaust pipe 201 first enters the silencing chamber of the muffler 202 through the air inlet pipe 203. After reflection, interference and damping attenuation, the silencing effect is achieved. Then, it flows into the rear section of the exhaust pipe 201 through the air outlet pipe 204 and is discharged to the outside through the exhaust tailpipe 10 at the rear end.

[0106] Furthermore, a sound valve 207 is provided between the front and rear sections of the exhaust pipe 201. The opening of the sound valve 207 is automatically adjusted by the vehicle control unit according to the operating conditions: when driving at low speed, the sound valve 207 is closed or slightly open, so that the exhaust gas in the exhaust pipe 201 needs to bypass the muffler 202 to extend the flow path and control the sound pressure level at a low level to avoid noise pollution; when driving at high speed or in sport mode, the sound valve 207 is fully open, and the exhaust gas flows directly from the front section of the exhaust pipe 201 into the rear section of the exhaust pipe 201 and is discharged through a short path, forming a deep sporty sound and enhancing the driving experience.

[0107] With the above configuration, the two exhaust pipes 201 share a single muffler 202, reducing redundant structural elements and avoiding turbulent interference from exhaust gases within the muffler 202, thus reducing airflow-generated noise. Simultaneously, the symmetrical structure ensures that the weight and vibration of the exhaust system are evenly distributed on both sides of the vehicle body, preventing body resonance caused by excessive load on one side and reducing driving noise.

[0108] In addition, the muffler 202 serves as an intermediate connection node, forming a rigid frame structure with the two exhaust pipes 201 through four pipes (two intake pipes 203 and two exhaust pipes 204), which improves the vibration resistance of the entire exhaust system and reduces the risk of pipe loosening or weld cracking during long-term use.

[0109] Each exhaust pipe 201 is also equipped with two hooks 206 on its outer wall. The hooks 206 are connected to the vehicle chassis via rubber lugs to install the muffler structure 20. The four hooks 206 form a four-point symmetrical suspension structure to ensure the spatial stability of the muffler structure 20 when the vehicle is in motion and reduce lateral sway.

[0110] Based on the above embodiment, a connecting pipe 205 is also provided between the two exhaust pipes 201. Along the exhaust gas discharge direction in the exhaust pipe 201, the connecting pipe 205 is located behind the muffler 202.

[0111] Although the muffler 202 can optimize exhaust flow through dual-path noise reduction, the internal resistance of the two exhaust pipes 201 may deviate due to manufacturing tolerances and differences in carbon deposits, resulting in uneven exhaust flow between the two paths and the formation of local pressure differences.

[0112] A connecting pipe 205 is installed behind the muffler 202, which can directly connect the rear sections of the two exhaust pipes 201. This allows the exhaust gas from the side with higher pressure to be diverted to the side with lower pressure through the connecting pipe 205, thereby balancing the pressure difference in the two exhaust pipes 201 in real time. This reduces the turbulent impact of exhaust gas in the exhaust pipes 201, lowers the overall exhaust back pressure, makes the engine exhaust smoother, and indirectly improves the power response speed.

[0113] In addition, the vehicle engine generates half-order noise due to the asymmetry of exhaust pulses. This half-order noise forms sound waves with a fixed phase difference in the two exhaust pipes 201. The connecting pipe 205 can use its lateral channel to provide a converging path for the half-order sound waves in the two exhaust pipes 201, allowing the opposing sound waves to interfere and cancel each other out, precisely eliminating the noise energy of specific half-order frequencies, making the exhaust sound smoother, and reducing low-frequency hum or harshness.

[0114] Based on the same inventive concept, this application also provides a vehicle including the aforementioned noise reduction structure 20.

[0115] The beneficial effects of the vehicle provided by this utility model are the same as those of the aforementioned noise reduction structure 20, and will not be repeated here.

[0116] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. Exhaust nozzle, characterized in that include: The tailpipe body (1) has an exhaust chamber (11) and a receiving cavity (12) disposed around the exhaust chamber (11). The front end of the exhaust chamber (11) is connected to the exhaust pipe (201) of the vehicle, and the rear end of the receiving cavity (12) has an exposure notch (13). A color-changing ring (2) is disposed in the receiving cavity (12) and is disposed corresponding to the exposure notch (13) so that the color of the color-changing ring (2) can be observed through the exposure notch (13).

2. The exhaust tailpipe as described in claim 1, characterized in that, The exhaust tailpipe also includes: An elastic pusher (3) is disposed in the receiving cavity (12) and connected to the color-changing ring (2). The elastic pusher (3) is configured with a pre-tightening force to press the color-changing ring (2) against the exposed notch (13). The width of the exposed notch (13) is smaller than the ring width of the color-changing ring (2) so as to restrict the displacement of the color-changing ring (2) in the opening direction of the exposed notch (13).

3. The exhaust tailpipe as described in claim 2, characterized in that, The elastic pusher (3) includes: An elastic element (31) is connected to the cavity sidewall of the receiving cavity (12); and The push plate (32) is connected to the elastic element (31), and the rear end face of the push plate (32) abuts against the color-changing ring (2).

4. The exhaust tailpipe as described in claim 3, characterized in that, The push plate (32) is provided with a positioning groove (321) with the opening facing backward, and the front end of the color-changing ring (2) is inserted into the positioning groove (321).

5. The exhaust tailpipe as described in claim 2, characterized in that, The tail throat body (1) includes: An inner pipe section (14) is connected to the exhaust pipe (201). The rear end of the inner pipe section (14) is provided with a first flange (141) that bends outward. The elastic pusher (3) is connected to the first flange (141). The outer tube section (15) includes an outer sleeve (151), an inner sleeve (152), and a bent portion (153) connecting the outer sleeve (151) and the inner sleeve (152). The outer sleeve (151), the inner sleeve (152), and the bent portion (153) together form the receiving cavity (12). The outer sleeve (151) is fitted around the outer periphery of the inner tube section (14), and the front end of the inner sleeve (152) is connected to the first flange (141). The inner cavity of the inner tube section (14) and the inner cavity of the embedded part (152) are connected to form the exhaust chamber (11); the exposed notch (13) is provided on the bent part (153).

6. The exhaust tailpipe as described in claim 5, characterized in that, The front end of the embedded part (152) is provided with a second flange (154) that bends outward, and the second flange (154) is attached to the first flange (141).

7. The exhaust tailpipe as described in claim 1, characterized in that, The receiving cavity (12) is annular, and multiple exposure notches (13) are provided at intervals along the circumference of the tail throat body (1), with each exposure notch (13) extending in an arc along the circumference of the tail throat body (1).

8. A sound-absorbing structure, characterized in that, Includes the exhaust tailpipe, exhaust pipe (201) and muffler (202) as described in any one of claims 1-7, wherein the exhaust tailpipe is connected to the tail end of the exhaust pipe (201), the muffler (202) is connected to the exhaust pipe (201), and the exhaust pipe (201) is connected to the vehicle's exhaust system.

9. The sound-absorbing structure as described in claim 8, characterized in that, Two exhaust pipes (201) are symmetrically arranged. A muffler (202) is arranged between the two exhaust pipes (201). The muffler (202) has two air inlets and two air outlets. Each exhaust pipe (201) is connected to the air inlet through an air inlet pipe (203) and each exhaust pipe (201) is connected to the air outlet through an air outlet pipe (204). The air inlet pipe (203) and the air outlet pipe (204) are arranged at intervals along the exhaust direction of the exhaust gas.

10. A vehicle, characterized in that, Includes the sound-absorbing structure as described in claim 8 or 9.

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