Silencer and vehicle

Abstract

The utility model relates to the technical field of automobile exhaust silencers, in particular to a silencer and a vehicle. The shell comprises an inner cavity; the air inlet pipe is contained in the shell, one end of the air inlet pipe is communicated with the outside of the shell, and a blanking cap is arranged at the end, located in the shell, of the air inlet pipe. The air inlet pipe is provided with an exhaust passage, the first end of the exhaust passage is communicated to the interior of the air inlet pipe, the second end of the exhaust passage is communicated to the inner cavity of the shell outside the air inlet pipe, and at least part of the second end of the exhaust passage is provided with a dispersing part for dispersing airflow in the exhaust direction; according to the silencer, the problems of thermal expansion and cold contraction deformation and / or high-temperature color change of the silencer can be avoided or reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust mufflers, in particular to a muffler and a vehicle. Background Art

[0002] The car's exhaust muffler is a key component installed at the rear of the engine, also known as a muffler. Its function is to reduce the noise and vibration generated by the exhaust system and reduce the emission of harmful emissions.

[0003] However, the existing vehicle-matched exhaust mufflers usually adopt a conventional straight tube-shaped perforated inner core hole tube structure. The perforated inner core hole tube structure refers to a series of perforations inside the intake pipe to form a hole tube structure, which is used to introduce some intake sound waves during the exhaust process to interfere with the exhaust sound waves, thereby reducing noise; and although the straight tube-shaped perforated inner core hole tube structure has a simple structure, under high-temperature and high-speed airflow conditions, the airflow is easy to directly blow the inner surface of the muffler shell, causing the muffler to deform due to thermal expansion and contraction and discolor at high temperature, thereby seriously affecting the service life of the muffler and the safety of the entire vehicle. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a muffler and a vehicle, which can avoid or reduce the thermal expansion and contraction deformation and / or high temperature discoloration problems of the muffler.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a muffler, comprising a shell and an air intake pipe; the shell comprises an inner cavity; the air intake pipe is accommodated in the shell and one end of the air intake pipe is connected to the outside of the shell, and a plug cover is provided at one end of the air intake pipe located in the shell;

[0006] An exhaust duct is provided on the intake pipe, a first end of the exhaust duct is connected to the interior of the intake pipe, a second end of the exhaust duct is connected to the inner cavity of the shell outside the intake pipe, and at least part of the second end of the exhaust duct is provided with a dispersion portion for dispersing the airflow in the exhaust direction.

[0007] In an embodiment of the present invention, the dispersion portion is an airway wall adjacent to the exhaust duct, and the airway wall is protruded toward the outer side of the tube surface of the intake pipe.

[0008] In an embodiment of the present invention, the dispersion portion is a curved surface structure with one end being large and the other end being small, and the small end of the dispersion portion of the curved surface structure faces the exhaust direction of the second end of the adjacent exhaust passage.

[0009] In an embodiment of the present invention, the exhaust duct is formed by cutting and punching.

[0010] In an embodiment of the present invention, the sum of the minimum cross-sectional areas of all the exhaust passages is greater than or equal to the minimum pipe diameter area of ​​the intake pipe.

[0011] In one embodiment of the utility model, the exhaust duct at least includes a radial air duct arranged along the radial direction of the intake pipe, and a plurality of the radial air ducts are arranged in a ring shape. Among the plurality of the radial air ducts in the same ring shape, at least one of the radial air ducts is located in the exhaust direction of the second end of the adjacent radial air duct.

[0012] In an embodiment of the present invention, the exhaust passage at least includes an axial air passage arranged along the axial direction of the intake pipe, and at least one of the axial air passages is located in the exhaust direction of the second end of another axial air passage.

[0013] In one embodiment of the utility model, the exhaust duct includes at least a radial air duct arranged along the radial direction of the intake pipe and an axial air duct arranged along the axial direction of the intake pipe, and at least a partial structure of the radial air duct exists in the exhaust direction of the second end of the axial air duct.

[0014] In an embodiment of the present invention, the size of the second end of the exhaust passage is 1 mm×3 mm.

[0015] In order to achieve the above-mentioned object and other related objects, the utility model provides a vehicle including the above-mentioned muffler.

[0016] To summarize, the utility model adds an end cover to one end of the intake pipe located in the shell, and opens a plurality of exhaust ducts on the pipe surface of the intake pipe, so that the second end of the exhaust duct is connected to the inner cavity of the shell outside the intake pipe, and at least part of the second end of the exhaust duct is provided with a dispersion portion for dispersing the airflow in the exhaust direction, which can further improve the effect of dispersing the airflow when the intake pipe is exhausted, so that when the intake pipe is exhausted into the inner cavity of the shell, it can avoid the high-speed and high-temperature exhaust gas from continuously releasing the exhaust gas only to a local position of the inner cavity of the shell, thereby further improving the technical problem of deformation and / or high-temperature discoloration of the muffler due to thermal expansion and contraction, and thus avoiding some problems caused by deformation and / or high-temperature discoloration of the muffler due to thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1This is a schematic diagram of the structure of the muffler of the utility model;

[0019] Figure 2 This is a schematic structural diagram of one embodiment of the air intake pipe of the utility model;

[0020] Figure 3 for Figure 2 Sectional view at NN of ;

[0021] Figure 4 This is a schematic structural diagram of another embodiment of the air intake pipe of the utility model;

[0022] Figure 5 for Figure 3 A magnified view of the structure at A;

[0023] Figure 6 It is a schematic diagram of the exhaust duct structure on the intake pipe in the utility model;

[0024] Figure 7 It is a structural schematic diagram of the first improved intake pipe of the utility model;

[0025] Explanation of component numbers: shell 1, inner cavity 11, air inlet pipe 2, air inlet end 20, plugging cover 21, exhaust duct 22, radial air duct 22A, axial air duct 22B, second end 221, dispersion portion 222, air outlet pipe 3, silencer pipe 4, silencer hole 41, mounting bracket 5, first through hole 6. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0027] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0028] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0029] See also Figure 1-3 , 5-6, the utility model provides a muffler, comprising a shell 1 and an air intake pipe 2, the shell 1 comprising an inner cavity 11; the air intake pipe 2 is accommodated in the shell 1 and one end of the air intake pipe 2 is connected to the outside of the shell 1, a plugging cover 21 is provided at one end of the air intake pipe 2 located in the shell 1, and the other end of the air intake pipe 2 is an air intake end 20;

[0030] The air intake pipe 2 is provided with an exhaust duct 22, a first end of the exhaust duct 22 is connected to the interior of the air intake pipe 2, a second end 221 of the exhaust duct 22 is connected to the inner cavity 11 of the shell 1 outside the air intake pipe 2, and at least a part of the second end 221 of the exhaust duct 22 is provided with a dispersion portion 222 for dispersing the airflow in the exhaust direction.

[0031] It should be noted that the exhaust muffler of a car is a key component installed at the rear of the engine, referred to as the muffler. The main function of the muffler is to reduce the noise and vibration generated by the exhaust system and reduce the emission of harmful emissions. The working principle of the exhaust muffler is to reduce noise by reducing the noise and pressure of the exhaust airflow. It is usually composed of a shell 1, an air intake pipe 2, an air outlet pipe 3, a muffler 4 and an internal sound insulation material. The internal sound insulation material (such as glass fiber, ceramic fiber or metal fabric) is placed in the shell 1 of the muffler to absorb and reduce the spread of noise; in addition to reducing noise, the muffler can also reduce harmful substances emitted by exhaust gas. For example, some mufflers are equipped with catalysts inside, which can help convert harmful gases into more harmless substances and reduce the impact on the environment. These mufflers are usually called catalytic converters. Although the most intuitive function of the exhaust muffler is to reduce noise, through its complex internal structure, it also plays an important role in the emission performance of the vehicle and the efficiency of the engine. For example, the mounting bracket 5 in the shape of a baffle is provided inside the muffler. Through the guidance and reflection of the metal sheet of the mounting bracket 5, the sound waves can be twisted, deflected and offset each other after entering the muffler, thereby achieving the purpose of reducing noise. For another example, the exhaust muffler includes an expansion chamber, that is, the inner cavity 11 of the shell 1 in this case. In the inner cavity 11 of the shell 1, the exhaust gas discharged into the inner cavity 11 is allowed to expand, reducing the speed and noise of the airflow; such as the muffler 4, it can "capture" sound waves of a specific frequency to a certain extent, attenuate the sound wave energy through the resonance principle, and further reduce the exhaust noise.

[0032] The shell 1 of the muffler is usually made of materials such as steel, aluminized steel or titanium, and a part of the structure of the intake pipe 2 is arranged inside the shell 1, and a part of the structure of the intake pipe 2 is located outside the shell 1. The material of the intake pipe 2 is generally stainless steel, aluminized steel or titanium. The structural form of the intake pipe 2 can also be various. For example, the shape of the intake pipe 2 is a straight pipe, a curved pipe or at least a part of the structure is a corrugated tube structure. The corrugated tube-shaped intake pipe 2 can absorb part of the vibration and part of the thermal expansion of the engine. The conventional intake pipe 2 is generally a straight tube-shaped perforated inner core hole tube structure, and the end of the intake pipe 2 located in the shell 1 does not have a blocking cover 21. Although the straight tube-shaped intake pipe 2 has a simple structure, under high temperature and high speed airflow conditions, the airflow of the automobile exhaust gas is easy to directly blow the inner surface of the muffler shell 1, causing the muffler to deform and / or discolor due to thermal expansion and contraction. For example, the exhaust temperature of some car models may be between 300°C and 1000°C before entering the muffler, and the speed of the exhaust gas when entering the muffler may be in the range of 10 meters / second to 30 meters / second (m / s). When the car is at high speed or accelerating, the exhaust gas speed and temperature may be higher.

[0033] The thermal expansion and contraction deformation of the muffler during operation may bring the following hazards. For example, when the muffler is deformed, the internal acoustic structure may be damaged or changed, resulting in the inability to effectively muffle the sound, thereby reducing the muffler effect; if the muffler is deformed, the exhaust airflow may flow abnormally, affecting the smooth flow and sound reduction effect of the airflow, resulting in increased exhaust noise; if the muffler is deformed, it may cause obstruction and uneven exhaust flow, resulting in poor exhaust emissions, affecting engine performance, and reducing combustion efficiency and power output; if the muffler is deformed, it will cause damage to its structure, such as cracks or breaks in welding points, resulting in failure of the muffler and requiring more frequent repairs or replacements. The high-temperature discoloration of the muffler during operation may bring the following hazards. For example, the discoloration of the muffler under high temperature conditions may cause structural changes in its internal materials, such as sintering, loss of elasticity, etc., thereby reducing the muffler's muffler effect. The design and material selection of the muffler are usually to achieve the best noise control effect within a certain operating temperature range. If the muffler changes color at high temperature, its normal noise and shock absorption effect may be reduced; high temperature can cause aging, fatigue, embrittlement, etc. of the muffler material, making the muffler more susceptible to physical damage and possibly shortening its service life, thereby reducing the durability of the muffler and requiring more frequent repairs or replacements.

[0034] See also Figure 7 In the improvement process of the present case, during the first improvement, without reducing the muffler function, an end cover is added to one end of the intake pipe 2 located in the shell 1, and a plurality of first through holes 6 are opened on the pipe surface of the intake pipe 2. The first through holes 6 connect the inside and outside of the intake pipe 2. When the intake pipe 2 introduces a high-temperature and high-speed airflow into the inner cavity 11, the uniformity of the exhaust of the intake pipe 2 can be improved to a certain extent, and the problem of deformation and / or high-temperature discoloration of the muffler due to thermal expansion and contraction can be improved to a certain extent.

[0035] See also Figure 1-3 , 5-6. In the second improvement of the present case, without reducing the muffler function, an end cover is added to one end of the intake pipe 2 located in the shell 1, and a plurality of exhaust ducts 22 are opened on the pipe surface of the intake pipe 2, so that the second end 221 of the exhaust duct 22 is connected to the inner cavity 11 of the shell 1 outside the intake pipe 2, and the second end 221 of at least part of the exhaust duct 22 is provided with a dispersion portion 222 for dispersing the airflow in the exhaust direction. Compared with the first improvement, the effect of dispersing the airflow when the intake pipe 2 is exhausted can be further improved, so that when the intake pipe 2 is exhausted to the inner cavity 11 of the shell 1, it can avoid that the high-speed and high-temperature exhaust gas is continuously released to a certain local position of the inner cavity 11 of the shell 1, thereby further improving the technical problem of deformation and / or high-temperature discoloration of the muffler due to thermal expansion and contraction.

[0036] See also Figure 2-6As an optional embodiment of the utility model, the dispersion portion 222 is an airway wall adjacent to the exhaust duct 22 , and the airway wall protrudes toward the outer side of the tube surface of the intake pipe 2 .

[0037] It should be noted that the dispersion portion 222 can be a baffle plate separately arranged on the tube surface of the intake pipe 2, such as an arc-shaped baffle plate or a baffle plate with multiple holes that is conducive to dispersing the airflow. Of course, when the dispersion portion 222 is the airway wall adjacent to the exhaust duct 22, and the airway wall protrudes toward the outer side of the tube surface of the intake pipe 2, it can be used in coordination with the adjacent exhaust duct 22 during exhaust, thereby improving the effect of dispersing the airflow, and avoiding the additional arrangement of the dispersion portion 222, thereby reducing the production and processing costs of the intake pipe 2.

[0038] See also Figure 2-6 As an optional embodiment of the utility model, the dispersion portion 222 is a curved structure with one end being large and the other end being small, and the small end of the dispersion portion 222 of the curved structure faces the exhaust direction of the second end 221 of the adjacent exhaust duct 22 .

[0039] It should be noted that part of the dispersion portion 222 may be a curved structure with one end larger and the other end smaller, while another part of the dispersion portion 222 may be a non-curved structure with one end larger and the other end smaller, or other structures that can disperse the airflow. By making the small end of the dispersion portion 222 face the exhaust direction of the second end 221 of the adjacent exhaust duct 22, the airflow from the exhaust duct 22 to the corresponding dispersion portion 222 can be more dispersed, thereby avoiding the airflow discharged from the exhaust duct 22 from being concentrated on the inner wall of the shell 1, avoiding or reducing the occurrence of thermal expansion and contraction deformation and / or high-temperature discoloration of the shell 1, which is beneficial to extending the service life of the muffler and the safety of the entire vehicle.

[0040] See also Figure 2-6 As an optional embodiment of the utility model, the exhaust duct 22 is formed by cutting and punching.

[0041] It should be noted that the exhaust duct 22 is formed by punching, which has a fast forming speed and low processing cost, and can make the exhaust duct 22 have a high degree of alignment, which is beneficial for the exhaust direction of the second end 221 of the exhaust duct 22 to be toward the dispersion part 222 formed by the adjacent corresponding exhaust duct 22, thereby improving the exhaust dispersion effect of the intake pipe 2.

[0042] See also Figure 2-3 , 5-6, as an optional embodiment of the utility model, the sum of the minimum cross-sectional areas of all the exhaust passages 22 is greater than or equal to the minimum pipe diameter area of ​​the intake pipe 2.

[0043] It should be noted that, since the gas flow rate and flow velocity of the gas entering the intake pipe 2 are certain, before the intake pipe 2 is improved, the end of the intake pipe 2 located in the shell 1 does not have an end cover, and the airflow entering the intake pipe 2 is directly discharged from the end of the intake pipe 2 to the inner cavity 11. Therefore, when designing the exhaust duct 22, it is necessary to avoid the airflow entering the intake pipe 2 from being blocked in the intake pipe 2. Therefore, the sum of the minimum cross-sectional areas of the exhaust channels of all the exhaust ducts 22 is required to be greater than or equal to the minimum pipe diameter area of ​​the intake pipe 2 to ensure smooth exhaust of the intake pipe 2 and avoid high-speed airflow being blocked in the intake pipe 2, thereby ensuring the normal use of the intake pipe 2.

[0044] It should be understood that the sum of the minimum cross-sectional areas of all the exhaust ducts 22 may also be smaller than the minimum pipe diameter area of ​​the intake pipe 2, but it is better if the sum of the minimum cross-sectional areas of all the exhaust ducts 22 is greater than or equal to the minimum pipe diameter area of ​​the intake pipe 2; it should also be understood that when the minimum pipe diameter area of ​​the intake pipe 2 is large enough and fully meets the use, and the sum of the minimum cross-sectional areas of all the exhaust ducts 22 is also large enough and fully meets the use, the sum of the minimum cross-sectional areas of all the exhaust ducts 22 and the minimum pipe diameter area of ​​the intake pipe 2 can be set according to actual needs.

[0045] See also Figure 2-3 As an optional embodiment of the utility model, the exhaust duct 22 at least includes a radial air duct 22A arranged along the radial direction of the intake pipe 2, and multiple radial air ducts 22A are arranged in a ring shape. Among the multiple radial air ducts 22A in the same ring shape, at least one of the radial air ducts 22A is located in the exhaust direction of the second end 221 of the adjacent radial air duct 22A.

[0046] It should be noted that by arranging the exhaust duct 22 along the radial direction of the intake pipe 2, the exhaust direction of each exhaust duct 22 is different, which is beneficial to the dispersion of exhaust gas from the intake pipe 2 to the shell 1. Furthermore, when the multiple radial air ducts 22A are arranged in a ring shape, in the multiple radial air ducts 22A arranged in the same ring shape, and each radial air duct 22A is located in the exhaust direction of the second end 221 of the adjacent radial air duct 22A, a closed-loop arrangement of multiple radial air ducts 22A is formed, so that the airflow ejected from each radial air duct 22A can be further dispersed by the dispersion portion 222 formed by the previous radial air duct 22A, thereby improving the dispersion effect of the airflow discharged from the intake pipe 2 to the shell 1.

[0047] See also Figure 2-4As an optional embodiment of the utility model, the exhaust duct 22 includes at least a plurality of axial air ducts 22B arranged along the axial direction of the intake pipe 2, and at least one of the axial air ducts 22B is located in the exhaust direction of the second end 221 of another axial air duct 22B.

[0048] It should be noted that, by providing a plurality of axial air ducts 22B, the dispersion direction of exhaust from the intake pipe 2 to the inner cavity 11 of the shell 1 is enriched, and by locating one of the axial air ducts 22B in the exhaust direction of the second end 221 of the axial air duct 22B at the other end, the airflow dispersion of the axial air duct 22B during exhaust can be further improved. When the axial air ducts 22B are arranged in an array, all the exhaust ducts 22 except the first row of exhaust ducts 22 can have a dispersion portion 222 for dispersing the airflow in front, thereby improving the airflow dispersion effect when the intake pipe 2 is exhausted.

[0049] It should be understood that multiple exhaust ducts 22 can also be arranged in a spiral arrangement on the pipe surface of the intake pipe 2, and one of the exhaust ducts 22 is located in the exhaust direction of the second end 221 of the exhaust duct 22 at the other end to improve the airflow dispersion of the exhaust duct 22 during exhaust.

[0050] See also Figure 2-3 As an optional embodiment of the utility model, the exhaust duct 22 at least includes a radial air duct 22A arranged along the radial direction of the intake pipe 2 and an axial air duct 22B arranged along the axial direction of the intake pipe 2, and at least a partial structure of the radial air duct 22A exists at the second end 221 of the axial air duct 22B in the exhaust direction.

[0051] It should be noted that by providing the radial air duct 22A and the axial air duct 22B, the exhaust direction of the exhaust duct 22 is diversified, so that the exhaust direction of the intake pipe 2 into the shell 1 is more dispersed, which can avoid or reduce the occurrence of thermal expansion and contraction deformation and / or high-temperature discoloration of the shell 1, which is beneficial to extending the service life of the muffler and the safety of the entire vehicle; further, since there is no structure for dispersing the airflow in front of the frontmost axial air duct 22B along the exhaust direction, the radial air duct 22A is provided in the exhaust direction of the second end 221 of the axial air duct 22B, so that the airflow ejected from the frontmost axial air duct 22B in the exhaust direction can be dispersed, and the exhaust directions of the multiple axial air ducts 22B arranged in an annular shape can be connected to form a closed-loop dispersed exhaust effect. The axial air duct 22B cooperates with the radial air duct 22A, so that the front of each exhaust duct 22 has a dispersion portion 222, so that the effect of dispersing the airflow of the intake pipe 2 is fully enhanced.

[0052] See also Figure 6As an optional embodiment of the utility model, the size of the punched opening of the exhaust duct 22 is between (1-2 mm) x (2 mm-5 mm).

[0053] It should be noted that the size of the mouth of the exhaust duct 22 punched out is between (1-2mm)×(2mm-5mm). Specifically, the width dimension X of the mouth of the exhaust duct 22 punched out is 1mm-2mm, and the length dimension L is 2mm-5mm. The size of the mouth of the exhaust duct 22 punched out is preferably 1mm×3mm. The specific size is set according to the actual vehicle model and actual selection requirements.

[0054] Furthermore, the intake pipe 2 is formed by a punching + rolling + welding process, such as first punching a cut on the flat plate, then stamping the exhaust duct 22 at the cut, and then rolling the flat plate with the exhaust duct 22 and welding it; or first directly punching the exhaust duct 22 on the flat plate, and then rolling the flat plate with the exhaust duct 22 and welding it. The punching and forming in this case can adopt a punching method without blanking, so that the structural strength of the intake pipe 2 after forming is still relatively high.

[0055] See also Figure 1-3 The present invention also provides a vehicle, including the above-mentioned muffler, so that the vehicle with the above-mentioned muffler is within the protection scope of this case.

[0056] See also Figure 2-3 As an optional embodiment of the utility model, the exhaust direction of the second end 221 of the radial air channel 22A is toward the tangential direction of the tube surface of the inlet pipe 2.

[0057] See also Figure 2-3 As an optional embodiment of the utility model, the radial air duct 22A and / or the axial air duct 22B are arranged in an array. On the one hand, it is convenient for the exhaust duct 22 on the intake pipe 2 to be arranged neatly and to be processed. On the other hand, the radial air ducts 22A arranged in the array are all aligned, and the axial air ducts 22B are also aligned, so that it is convenient for one of the two adjacent exhaust ducts 22 located on the same line along the annular curve in the circumferential direction of the tube surface of the intake pipe 2 or the straight line in the axial direction of the tube surface of the intake pipe 2, one of the exhaust ducts 22 is located in the exhaust direction of the second end 221 of the adjacent exhaust duct 22, thereby improving the dispersion effect of the exhaust duct 22 on the intake pipe 2 during exhaust, avoiding or reducing the high-temperature and high-speed airflow directly blowing onto the inner wall of the shell 1 of the muffler, avoiding or reducing the occurrence of thermal expansion and contraction deformation and / or high-temperature discoloration of the shell 1, which is beneficial to extending the service life of the muffler and the safety of the entire vehicle.

[0058] See also Figure 1Furthermore, the muffler also includes an air outlet pipe 3, which is accommodated in the shell 1, and one end of the air outlet pipe 3 is connected to the outside of the shell 1, so that the air flow in the muffler can be discharged smoothly.

[0059] See also Figure 1 Furthermore, the muffler also includes a muffler pipe 4, and the muffler pipe 4 is completely accommodated in the shell 1 to improve the muffler effect.

[0060] See also Figure 1 Furthermore, the air inlet pipe 2 and / or the air outlet pipe 3 and / or the muffler pipe 4 are provided with a muffler hole 41 on the structure of the shell 1, and the muffler hole 41 is provided to enhance the muffler's muffler capability.

[0061] See also Figure 1 As an optional embodiment of the utility model, the air inlet pipe 2 and the air outlet pipe 3 are not arranged in parallel.

[0062] Furthermore, the inlet pipe 2 is arranged perpendicular to the outlet pipe 3, and the arrangement direction of the inlet pipe 2 is perpendicular to the length direction of the shell 1, so that the exhaust direction of the axial exhaust duct 22 of the inlet pipe 2 is away from the inner wall of the shell 1, so that under the condition of high temperature and high speed airflow, the problem of the airflow entering the shell 1 from the inlet pipe 2 directly blowing the inner surface of the shell 1 and causing the muffler to deform and / or discolor at high temperature can be avoided or reduced, thereby protecting the muffler and avoiding the shell 1 of the muffler from being in a high temperature state and endangering the safety of the entire vehicle.

[0063] See also Figure 1 Furthermore, a mounting bracket 5 for mounting the air outlet pipe 3 and the silencer pipe 4 is also provided in the shell 1, so that the air outlet pipe 3 and the silencer pipe 4 can be stably mounted in the shell 1.

[0064] See also Figure 1 Furthermore, the air outlet pipe 3 is provided with a plurality of air outlet holes so that the air outlet pipe 3 can exhaust air to the outside of the shell 1 .

[0065] In summary, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0066] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A muffler, characterized in that: include: a housing including an inner cavity; An air intake pipe is accommodated in the shell and one end of the air intake pipe is connected to the outside of the shell, and a plug cover is provided at one end of the air intake pipe located in the shell; An exhaust duct is provided on the intake pipe, a first end of the exhaust duct is connected to the interior of the intake pipe, a second end of the exhaust duct is connected to the inner cavity of the shell outside the intake pipe, and at least part of the second end of the exhaust duct is provided with a dispersion portion for dispersing the airflow in the exhaust direction.

2. A muffler according to claim 1, characterized in that: The dispersion portion is an airway wall adjacent to the exhaust duct, and the airway wall is convexly arranged to extend outwardly from the tube surface of the intake pipe.

3. A muffler according to claim 2, characterized in that: The dispersing portion is a curved surface structure with one end being large and the other end being small, and the small end of the dispersing portion of the curved surface structure faces the exhaust direction of the second end of the adjacent exhaust passage.

4. A muffler according to claim 1, characterized in that: The exhaust duct is formed by cutting and punching.

5. A muffler according to claim 1, characterized in that: The sum of the minimum cross-sectional areas of all the exhaust passages is greater than or equal to the minimum pipe diameter area of ​​the intake pipe.

6. A muffler according to claim 1, characterized in that: The exhaust passage at least includes radial air passages arranged along the radial direction of the intake pipe, and a plurality of the radial air passages are arranged in a ring shape. Among the plurality of radial air passages in the same ring shape, at least one of the radial air passages is located in the exhaust direction of the second end of the adjacent radial air passage.

7. A muffler according to claim 1, characterized in that: The exhaust passage at least includes an axial air passage arranged along the axial direction of the intake pipe, and at least one of the axial air passages is located in the exhaust direction of the second end of another axial air passage.

8. A muffler according to claim 1, characterized in that: The exhaust passage at least includes a radial air passage arranged along the radial direction of the intake pipe and an axial air passage arranged along the axial direction of the intake pipe, and at least a partial structure of the radial air passage exists in the exhaust direction of the second end of the axial air passage.

9. A muffler according to claim 1, characterized in that: The size of the second end of the exhaust passage is 1 mm×3 mm.

10. A vehicle comprising the muffler according to any one of claims 1 to 9.

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