Automobile exhaust silencing pipe

Abstract

The utility model relates to an automobile exhaust silencing pipe, which is characterized in that cutting slotted holes (13) are formed in the right end of a silencing straight pipe (11) in a shell (1) and are distributed in an axial symmetry manner. Through the arrangement of the silencing straight pipes and the cutting groove holes, the silencing pipe has the advantages of increasing the flow area and being good in silencing effect, and the problems that an existing traditional silencing pipe is of a mesh structure, the minimum distance between every two adjacent holes is limited, the through-flow area is limited, certain resistance can be formed, and the silencing effect of the silencing pipe is affected are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts and relates to an automobile exhaust silencing pipe. Background Art

[0002] The exhaust noise of an automobile is a main component of the driving noise. All countries in the world have strict regulations on the limit values of the noise of various vehicles. The exhaust muffler is a device born to reduce the exhaust noise. The function of the exhaust muffler is to eliminate the noise by reducing and attenuating the pulsation of the exhaust pressure. Reduce the exhaust noise of the engine and enable the high-temperature exhaust gas to be discharged safely and effectively. As a part of the exhaust pipe, the silencing pipe should ensure smooth exhaust, low resistance and sufficient strength.

[0003] The traditional silencing pipe has a mesh hole structure, with a minimum distance limit between adjacent two holes, limited flow area, which will form a certain resistance and affect the silencing effect of the silencing pipe.

[0004] In view of this, it is necessary to further improve the structure of the silencing pipe to further reduce the exhaust resistance. Summary of the Utility Model

[0005] The utility model aims to solve the problem that the flow area of the traditional silencing pipe with a mesh hole structure is limited, and proposes an exhaust muffler and its silencing pipe that can increase the flow area and reduce the exhaust resistance.

[0006] The utility model is realized by the following technical solutions:

[0007] The above-mentioned automobile exhaust silencing pipe includes a housing (1), and a silencing straight pipe (11) is arranged inside the housing (1). A cutting slot hole (13) is opened at the right end of the silencing straight pipe (11), and the cutting slot hole (13) is axially symmetrically distributed.

[0008] The above-mentioned automobile exhaust silencing pipe, wherein: the silencing pipe includes a second partition plate (4), a third partition plate (12) and a fourth partition plate (2). An air inlet pipe (10) is arranged at the right end of the front surface of the housing (1). A mounting block (3) is welded to the front surface of the air inlet pipe (10). A sealing member (9) is welded between the right end of the front surface of the air inlet pipe (10) and the rear end of the outer surface of the air inlet pipe (10). The silencing straight pipe (11) is fixedly connected to the inner surfaces of the upper ends of the second partition plate (4) and the third partition plate (12). A perforated pipe (7) is arranged between the third partition plate (12) and the fourth partition plate (2).

[0009] The described automobile exhaust muffler pipe, wherein: a first partition plate (5), a second partition plate (4), a third partition plate (12) and a fourth partition plate (2) are sequentially welded in the inner cavity of the housing (1) from left to right. Three muffler cavities are formed in the inner cavity of the housing (1) through the first partition plate (5), the second partition plate (4), the third partition plate (12) and the fourth partition plate (2). An air outlet pipe (6) is fixedly connected to the inner surfaces of the lower ends of the first partition plate (5) and the second partition plate (4), and the air outlet pipe (6) extends to the outside of the housing (1).

[0010] The described automobile exhaust muffler pipe, wherein: the front end of the perforated pipe (7) is sleeved on the rear end of the air inlet pipe (10).

[0011] The described automobile exhaust muffler pipe, wherein: a U-shaped mounting bracket (8) is fixedly installed in the middle of the front surface of the housing (1).

[0012] The described automobile exhaust muffler pipe, wherein: high-temperature resistant layers (14) are coated on the outer sides of the housing (1), the mounting block (3), the air outlet pipe (6) and the air inlet pipe (10). An enhancing layer (15) is coated on the outer side of the high-temperature resistant layer (14), and a protective layer (16) is coated on the outer side of the enhancing layer (15).

[0013] The described automobile exhaust muffler pipe, wherein: the high-temperature resistant layer (14) is a graphite coating layer, the enhancing layer (15) is a polyimide coating layer, and the protective layer (16) is a polyether ether ketone coating layer. Beneficial effects

[0014] The muffler pipe of the present utility model adopts a slotted hole structure, which increases the flow area, and the effect is more obvious especially for shorter mufflers with similar length and diameter dimensions.

[0015] After the present utility model is connected to an automobile engine through the mounting block, the gas discharged from the engine can enter the muffler cavity at the rightmost end inside the housing through the air inlet pipe and the perforated pipe. Then, through the arrangement of the muffler straight pipe and the cutting slot holes, it can be distinguished from the traditional mesh hole structure restricted by the minimum distance between two holes. The use of cutting slot holes can increase the flow area, reduce the exhaust resistance, so that the gas is finally discharged outward through the air outlet pipe, enabling the present muffler pipe to have the ability to increase the flow area and good muffling effect.

[0016] Through the arrangement of the high-temperature resistant layer, the high-temperature resistance and heat conduction performance of the surface of the silencing pipe can be improved due to the influence of the selected materials, so that it can have a certain heat insulation ability, avoiding the situation that pedestrians or users are accidentally scalded due to the high surface temperature of the silencing pipe. Through the arrangement of the strengthening layer, the toughness and impact resistance of the surface of the silencing pipe can be improved due to the influence of the selected materials. Through the arrangement of the protective layer, the wear resistance, hardness, weather resistance and impact resistance of the surface of the silencing pipe can be improved. Due to the distribution of the above structures, the service life and external aesthetics of the silencing pipe can be improved. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the first perspective of the present utility model;

[0018] Figure 2 is a schematic sectional structural diagram of the second perspective of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the third perspective of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the straight silencing pipe of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the strengthening layer of the present utility model.

[0022] In the figure: 1. Shell; 2. Fourth partition; 3. Mounting block; 4. Second partition; 5. First partition; 6. Air outlet pipe; 7. Perforated pipe; 8. U-shaped mounting frame; 9. Sealing member; 10. Air inlet pipe; 11. Straight silencing pipe; 12. Third partition; 13. Cutting slot; 14. High-temperature resistant layer; 15. Strengthening layer; 16. Protective layer. Detailed Description of the Preferred Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The components such as the housing 1, the fourth partition 2, the mounting block 3, the second partition 4, the first partition 5, the air outlet pipe 6, the perforated pipe 7, the U-shaped mounting bracket 8, the seal 9, the air inlet pipe 10, the muffler straight pipe 11, the third partition 12, the cutting slot 13, the high-temperature resistant layer 14, the reinforcing layer 15 and the protective layer 16 of the present application are all common standard components or components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. Embodiment 1

[0027] Please refer to Figures 1-5As shown in the figure, the present utility model provides a technical solution: an automotive exhaust muffler pipe, including a housing 1, a second partition 4, a third partition 12, and a fourth partition 2. At the right end of the front surface of the housing 1, an intake pipe 10 is provided. A mounting block 3 is welded to the front surface of the intake pipe 10. A seal 9 is welded between the right end of the front surface of the intake pipe 10 and the rear end of the outer surface of the intake pipe 10. Inside the housing 1, a first partition 5, a second partition 4, a third partition 12, and a fourth partition 2 are successively welded from left to right. Inside the housing 1, three muffler chambers are formed by the first partition 5, the second partition 4, the third partition 12, and the fourth partition 2. The inner surfaces of the lower ends of the first partition 5 and the second partition 4 are fixedly connected with an outlet pipe 6, and the outlet pipe 6 extends to the outside of the housing 1. The inner surfaces of the upper ends of the second partition 4 and the third partition 12 are fixedly connected with a muffler straight pipe 11. A cutting slot hole 13 is provided on the inner surface of the right end of the muffler straight pipe 11. The number of cutting slot holes 13 is even, and the cutting slot holes 13 are axially symmetrically distributed. A perforated pipe 7 is provided between the third partition 12 and the fourth partition 2. The front end of the perforated pipe 7 is sleeved on the rear end of the intake pipe 10.

[0028] This technical solution: By adopting a slotted hole structure and changing the distribution of the holes, it overcomes the minimum distance limitation between two holes in the existing mesh hole structure. Therefore, slotting can have a larger flow area, and the effect is more obvious for a shorter muffler. After connecting with the automotive engine through the mounting block 3, the gas discharged from the engine can enter the muffler chamber at the rightmost end inside the housing 1 through the intake pipe 10 and the perforated pipe 7. Then, through the setting of the muffler straight pipe 11 and the cutting slot holes 13, it can be distinguished from the traditional mesh hole structure that is restricted by the minimum distance between two holes. Using the cutting slot holes 13 can increase the flow area and reduce the exhaust resistance, enabling the gas to finally be discharged outward through the outlet pipe 6, making this muffler pipe have the ability to increase the flow area and have a good muffling effect. Embodiment Two

[0029] On the basis of Embodiment One, as shown in the present utility model Figures 1-3 a U-shaped mounting bracket 8 is fixedly installed in the middle of the front surface of the housing 1.

[0030] This technical solution: Through the setting of the U-shaped mounting bracket 8, the position of the housing 1 can be strengthened and supported, ensuring the stability of the housing 1, the outlet pipe 6, and the intake pipe 10 during use. Embodiment Three

[0031] On the basis of Embodiment One, as shown in the present utility model Figures 1-5 a high-temperature resistant layer 14 is coated on the outer sides of the housing 1, the mounting block 3, the outlet pipe 6, and the intake pipe 10. An enhanced layer 15 is coated on the outer side of the high-temperature resistant layer 14. A protective layer 16 is coated on the outer side of the enhanced layer 15. The high-temperature resistant layer 14 is a graphite coating layer, the enhanced layer 15 is a polyimide coating layer, and the protective layer 16 is a polyether ether ketone coating layer.

[0032] This technical solution: Through the setting of the high-temperature resistant layer 14, the high-temperature resistance and heat conduction performance of the surface of the sound-absorbing pipe can be improved due to the influence of the selected materials, so that it can have a certain heat insulation ability, avoiding the situation that pedestrians or users are accidentally scalded due to the high surface temperature of the sound-absorbing pipe. Through the setting of the strengthening layer 15, the toughness and impact resistance of the surface of the sound-absorbing pipe can be improved due to the influence of the selected materials. Through the setting of the protective layer 16, the wear resistance, hardness, weather resistance and impact resistance of the surface of the sound-absorbing pipe can be improved. In summary, the distribution of the above structures can improve the service life and external aesthetics of the sound-absorbing pipe.

[0033] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (for example, the dimensions, scales, structures, shapes and proportions of various elements, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structure described herein for performing the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0034] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present utility model or those features that are not relevant to the implementation of the present utility model).

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the present utility model.

Claims

1. An automotive exhaust muffler pipe, comprising a housing (1), characterized in that: The housing (1) is provided with a straight silencing pipe (11) inside. A cutting slot hole (13) is formed at the right end of the straight silencing pipe (11), and the cutting slot holes (13) are axially symmetrically distributed. The silencing pipe includes a second partition (4), a third partition (12) and a fourth partition (2). An air inlet pipe (10) is arranged at the right end of the front surface of the housing (1). A mounting block (3) is welded to the front surface of the air inlet pipe (10). A seal (9) is welded between the right end of the front surface of the air inlet pipe (10) and the rear end of the outer surface of the air inlet pipe (10). The straight silencing pipe (11) is fixedly connected to the inner surfaces of the upper ends of the second partition (4) and the third partition (12). A perforated pipe (7) is arranged between the third partition (12) and the fourth partition (2).

2. The automotive exhaust muffler pipe according to claim 1, characterized in that: A first partition (5), a second partition (4), a third partition (12) and a fourth partition (2) are successively welded in the inner cavity of the housing (1) from left to right. Three silencing cavities are formed in the inner cavity of the housing (1) by the first partition (5), the second partition (4), the third partition (12) and the fourth partition (2). An air outlet pipe (6) is fixedly connected to the inner surfaces of the lower ends of the first partition (5) and the second partition (4), and the air outlet pipe (6) extends to the outside of the housing (1).

3. The automotive exhaust muffler pipe according to claim 1, characterized in that: The front end of the perforated pipe (7) is sleeved on the rear end of the air inlet pipe (10).

4. The automotive exhaust muffler pipe according to claim 1, wherein: A U-shaped mounting bracket (8) is fixedly installed in the middle of the front surface of the housing (1).

5. The automotive exhaust muffler pipe according to claim 1, characterized in that: High-temperature resistant layers (14) are coated on the outer sides of the housing (1), the mounting block (3), the air outlet pipe (6) and the air inlet pipe (10). An enhanced layer (15) is coated on the outer side of the high-temperature resistant layer (14). A protective layer (16) is coated on the outer side of the enhanced layer (15).

6. The automotive exhaust muffler pipe according to claim 5, wherein: The high-temperature resistant layer (14) is a graphite coating layer, the enhanced layer (15) is a polyimide coating layer, and the protective layer (16) is a polyether ether ketone coating layer.

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