Automobile exhaust flange structure

Abstract

The utility model relates to the technical field of automobile parts and discloses an automobile exhaust flange structure which comprises a first flange plate and a second flange plate, the first flange plate and the second flange plate are oppositely arranged, a sealing assembly is arranged between the first flange plate and the second flange plate, and a plurality of positioning inserting rods are arranged on the side, facing the second flange plate, of the first flange plate. A positioning insertion hole matched with the positioning insertion rod is formed in the side, facing the first flange plate, of the second flange plate. According to the automobile exhaust flange structure, the sealing assembly composed of the inner sealing ring, the outer sealing ring and the elastic compensation layer is arranged, double sealing can be achieved through the inner sealing ring and the outer sealing ring, the elastic compensation layer recovers deformation in the high-temperature environment to apply pressure to the inner sealing ring and the outer sealing ring, the sealing effect is further enhanced, exhaust leakage is effectively prevented, and meanwhile the sealing effect is improved. The elastic buffering sleeve in the fastening assembly can buffer vibration in the automobile running process, the risk of flange loosening is reduced, and the stability and reliability of the exhaust flange structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an automotive exhaust flange structure. Background Technology

[0002] The exhaust system has a significant impact on a car's power and emissions, especially under my country's increasingly stringent emission standards, which place stricter requirements on the exhaust system. Generally, the exhaust system is divided into three parts: front, middle, and rear pipes. Each part is quite heavy and they are connected and fixed to each other by flanges.

[0003] Traditional automotive exhaust flange structures are prone to exhaust leakage under high temperature and high pressure exhaust environments during use. This not only causes power loss and noise, but also the leakage of exhaust gas may corrode surrounding components. Furthermore, the existing flange structure has limited buffering capacity when dealing with vibrations and displacements during vehicle operation, and is prone to loosening after long-term use, affecting the stability and reliability of the exhaust system and thus shortening the service life of the exhaust system. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of unstable connection and easy leakage of automobile exhaust flange structure under high temperature, high pressure and vibration environment. Therefore, we propose an automobile exhaust flange structure.

[0005] To achieve the above objectives, this application adopts the following technical solution: an automotive exhaust flange structure, including a first flange and a second flange, the first flange and the second flange being arranged opposite to each other, a sealing assembly being provided between the first flange and the second flange, a plurality of positioning rods being provided on the side of the first flange facing the second flange, and positioning holes adapted to the positioning rods being opened on the side of the second flange facing the first flange, and annular fixing plates being provided on one side of both the first flange and the second flange, the two annular fixing plates being connected by a plurality of fastening assemblies, the sealing assembly including an inner sealing ring, an outer sealing ring and an elastic compensation layer, the inner sealing ring and the outer sealing ring being located on the inner side near the positioning rod and the outer side away from the positioning rod respectively, the elastic compensation layer being located between the inner sealing ring and the outer sealing ring, and annular mounting grooves being opened on both the first flange and the second flange corresponding to the inner sealing ring, the outer sealing ring and the elastic compensation layer, the fastening assembly including bolts and nuts, an elastic buffer sleeve being sleeved on the outer periphery of the bolt shank, the elastic buffer sleeve being located between the annular fixing plates.

[0006] Preferably, both the inner and outer sealing rings are made of a high-temperature and corrosion-resistant rubber and metal composite material, and the inner and outer sealing rings have wavy sealing protrusions on the side closest to each other.

[0007] Preferably, the bottom of the annular mounting groove is provided with anti-slip texture.

[0008] Preferably, the outer walls of the inner sealing ring, the outer sealing ring, and the elastic compensation layer are provided with anti-slip protrusions that are adapted to the anti-slip texture.

[0009] Preferably, the outer periphery of the positioning rod is fitted with a high-temperature resistant wear-resistant sleeve, and the outer periphery of the wear-resistant sleeve is provided with a spiral groove.

[0010] Preferably, the annular fixing plate has multiple weight-reducing holes, which are distributed in a ring array.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] In this invention, a sealing assembly consisting of an inner sealing ring, an outer sealing ring, and an elastic compensation layer is provided. The inner and outer sealing rings can achieve double sealing. The elastic compensation layer restores its deformation under high temperature conditions and applies pressure to the inner and outer sealing rings, further enhancing the sealing effect and effectively preventing exhaust leakage. At the same time, the elastic buffer sleeve in the fastening assembly can buffer the vibration during vehicle operation, reduce the risk of flange loosening, and improve the stability and reliability of the exhaust flange structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the sealing component structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the annular mounting groove structure of this utility model.

[0017] Legend: 1. First flange; 2. Second flange; 3. Positioning rod; 4. Positioning hole; 5. Annular fixing plate; 6. Fastening assembly; 7. Inner sealing ring; 8. Outer sealing ring; 9. Elastic compensation layer; 10. Annular mounting groove; 11. Sealing protrusion; 12. Bolt; 13. Nut; 14. Elastic buffer sleeve; 15. Wear-resistant sleeve; 17. Weight reduction hole; 18. Anti-slip protrusion. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] Reference Figures 1-4As shown, this utility model provides a technical solution: an automotive exhaust flange structure, including a first flange 1 and a second flange 2, which are arranged opposite to each other. A sealing assembly is provided between the first flange 1 and the second flange 2. Multiple positioning pins 3 are provided on the side of the first flange 1 facing the second flange 2, and positioning holes 4 adapted to the positioning pins 3 are provided on the side of the second flange 2 facing the first flange 1. Annular fixing plates 5 are provided on one side of both the first flange 1 and the second flange 2. The two annular fixing plates 5 are connected by multiple fastening components 6. The sealing assembly includes an inner sealing ring 7, an outer sealing ring 8, and an elastic compensation layer 9. The inner sealing ring 7 and the outer sealing ring 8 are located on the inner side near the positioning pins 3 and the outer side away from the positioning pins 3, respectively. The elastic compensation layer 9 is located on the inner sealing ring 7 and the outer sealing ring 8. Between the outer sealing rings 8, annular mounting grooves 10 are provided on the first flange 1 and the second flange 2 corresponding to the inner sealing ring 7, the outer sealing ring 8, and the elastic compensation layer 9. The fastening assembly 6 includes bolts 12 and nuts 13. An elastic buffer sleeve 14 is fitted around the outer circumference of the shank of the bolt 12. The elastic buffer sleeve 14 is located between the annular fixing plates 5. By setting the sealing assembly composed of the inner sealing ring 7, the outer sealing ring 8, and the elastic compensation layer 9, the inner sealing ring 7 and the outer sealing ring 8 can achieve double sealing. The elastic compensation layer 9 restores its deformation under high temperature environment and applies pressure to the inner sealing ring 7 and the outer sealing ring 8, further enhancing the sealing effect and effectively preventing exhaust leakage. At the same time, the elastic buffer sleeve 14 in the fastening assembly 6 can buffer the vibration during vehicle operation, reduce the risk of flange loosening, and improve the stability and reliability of the exhaust flange structure.

[0020] Reference Figure 3 As shown in this embodiment: the elastic compensation layer 9 is made of shape memory alloy material. By using shape memory alloy material for the elastic compensation layer 9, it is in a compressed state at room temperature and can recover its deformation in a high temperature environment and apply pressure to the inner sealing ring 7 and the outer sealing ring 8, thereby realizing automatic compensation of sealing pressure and improving sealing performance, which is innovative.

[0021] Reference Figure 3 As shown in this embodiment: both the inner sealing ring 7 and the outer sealing ring 8 are made of a high-temperature resistant and corrosion-resistant rubber and metal composite material. The inner sealing ring 7 and the outer sealing ring 8 are provided with wavy sealing protrusions 11 on the side close to each other. By using rubber and metal composite material for the inner sealing ring 7 and the outer sealing ring 8 and providing wavy sealing protrusions 11, both high-temperature resistance and corrosion resistance can be guaranteed. At the same time, the wavy sealing protrusions 11 increase the sealing contact area and further improve the sealing effect.

[0022] Reference Figure 4As shown in this embodiment: the bottom of the annular mounting groove 10 is provided with anti-slip texture, and the outer walls of the inner sealing ring 7, outer sealing ring 8 and elastic compensation layer 9 are provided with anti-slip protrusions 18 that are adapted to the anti-slip texture. By the cooperation between the anti-slip texture of the annular mounting groove 10 and the anti-slip protrusions 18 on the outer wall of the sealing assembly, the sealing assembly can be prevented from shifting in the annular mounting groove 10, thus ensuring the installation stability of the sealing assembly.

[0023] Reference Figure 3 As shown in this embodiment: a high-temperature resistant wear-resistant sleeve 15 is fitted around the outer periphery of the positioning rod 3. The outer periphery of the wear-resistant sleeve 15 is provided with a spiral groove. Through the wear-resistant sleeve 15 and its spiral groove around the positioning rod 3, the wear between the positioning rod 3 and the positioning hole 4 can be reduced. At the same time, the spiral groove helps to discharge any impurities that may enter, ensuring the reliability of the positioning connection.

[0024] Reference Figure 2 As shown in this embodiment: the annular fixing plate 5 is provided with multiple weight reduction holes 17, which are arranged in a ring array. The weight of the flange structure can be reduced through the weight reduction holes 17 on the annular fixing plate 5, and lightweight design can be achieved without affecting the strength.

[0025] Working principle: During installation, the user first inserts the inner sealing ring 7, the outer sealing ring 8, and the elastic compensation layer 9 into the corresponding annular mounting grooves 10 of the first flange 1 and the second flange 2, respectively. Then, the positioning rod 3 of the first flange 1 is inserted into the positioning hole 4 of the second flange 2. Finally, the two annular fixing plates 5 are fastened together by the fastening assembly 6 to make the sealing assembly fit tightly and complete the installation.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automobile exhaust flange structure comprising a first flange plate and a second flange plate, characterized by: The first flange and the second flange are arranged opposite to each other, and a sealing assembly is provided between the first flange and the second flange. Multiple positioning pins are provided on the side of the first flange facing the second flange, and positioning holes adapted to the positioning pins are opened on the side of the second flange facing the first flange. Annular fixing plates are provided on one side of both the first flange and the second flange. The two annular fixing plates are connected by multiple fastening components. The sealing assembly includes an inner sealing ring, an outer sealing ring, and an elastic compensation layer. The inner sealing ring and the outer sealing ring are located on the inner side near the positioning pin and the outer side away from the positioning pin, respectively. The elastic compensation layer is located between the inner sealing ring and the outer sealing ring. Annular mounting grooves are opened on both the first flange and the second flange corresponding to the inner sealing ring, the outer sealing ring, and the elastic compensation layer. The fastening assembly includes bolts and nuts. An elastic buffer sleeve is fitted around the outer circumference of the bolt shank, and the elastic buffer sleeve is located between the annular fixing plates.

2. The exhaust flange structure of claim 1, wherein: Both the inner and outer sealing rings have wavy sealing protrusions on the side closest to each other.

3. The exhaust flange structure of claim 1, wherein: The bottom of the annular mounting groove is provided with anti-slip texture.

4. The exhaust flange structure of claim 1, wherein: The outer walls of the inner sealing ring, outer sealing ring, and elastic compensation layer are provided with anti-slip protrusions that are adapted to the anti-slip texture.

5. The exhaust flange structure of claim 1, wherein: The positioning rod is fitted with a high-temperature resistant wear-resistant sleeve, and the wear-resistant sleeve has a spiral groove on its outer periphery.

6. The exhaust flange structure of claim 1, wherein: The annular fixing plate has multiple weight-reducing holes, which are arranged in a ring array.

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