Exhaust pipe end connecting flange for automobiles

Abstract

The utility model relates to the technical field of automobile exhaust pipe end connecting flange, specifically relates to a kind of exhaust pipe end connecting flange for automobile, including first connecting flange and second connecting flange, the utility model when installing, first connecting flange and second connecting flange butt joint, so that guide column slidingly penetrates and inserts guide hole, simultaneously, after the insertion tube slidingly inserts in the inside of sleeve, then the hexagonal head of hexagonal head bolt is placed in the inside of hexagonal slot, then the hexagonal head bolt is connected using nut thread, is tightened and fixed, when tightening, first tooth ring and second tooth ring are mutually engaged, and can play the effect of nut rotation stop by wedge block structure setting, when tightening nut fixed, the arc surface of second annular sealing washer will be extruded first annular sealing washer, by the cavity setting of first annular sealing washer, so that first annular sealing washer deforms, first annular sealing washer can better adhere to annular groove, ensure better sealing effect, prevent exhaust leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive exhaust pipe end connection flanges, specifically an exhaust pipe end connection flange for automobiles. Background Technology

[0002] The flange at the end of the automotive exhaust pipe is a key component used to fix and seal the exhaust pipe interface. The two flanges are tightly connected by bolts to ensure the airtightness of the exhaust system.

[0003] The existing exhaust pipe end flanges, after being fixed with bolts, are prone to loosening when the vehicle is in motion. In addition, the conventional gaskets have poor sealing performance, which can easily cause exhaust gas leakage, affecting exhaust efficiency and leading to a decrease in power.

[0004] Therefore, a flange for connecting the exhaust pipe end of a car is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an exhaust pipe end connection flange for automobiles. This solves the problems of existing exhaust pipe end connection flanges, which, after being fixed with bolts, are prone to loosening during vehicle operation. Furthermore, conventional gaskets have poor sealing performance, easily causing exhaust gas leakage, affecting exhaust efficiency, and consequently leading to a decrease in power.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a first connecting flange and a second connecting flange, with an installation mechanism provided between the first and second connecting flanges. The installation mechanism includes a sleeve, a insert, a hexagonal groove, a hexagonal head bolt, a through hole, a nut, a guide post, and a guide hole. A sleeve is integrally formed on one side of the first connecting flange, and an insert is integrally formed on one side of the second connecting flange. A hexagonal groove is formed on one side of the first connecting flange, and a hexagonal head bolt is inserted through the inner side of the hexagonal groove. A through hole is formed on one side of the second connecting flange, and a nut is threaded to one end of the hexagonal head bolt. A guide post is integrally formed on one side of the first connecting flange, and a guide hole is formed through the second connecting flange on one side.

[0007] Preferably, the guide post slides through and is inserted into the guide hole, the outer wall of the guide post fits against the inner wall of the guide hole, and two guide posts and two guide holes are provided.

[0008] Preferably, the hexagonal head of the hexagonal head bolt is placed inside the hexagonal groove, and the inner wall of the hexagonal groove is adapted to the outer wall of the hexagonal head.

[0009] Preferably, the cannula is slidably inserted into the inner side of the sleeve, and the outer wall of the cannula is in contact with the inner wall of the sleeve.

[0010] Preferably, an anti-detachment mechanism is provided at the connection between the second connecting flange and the nut. The anti-detachment mechanism includes a first toothed ring and a second toothed ring. The first toothed ring is integrally formed on one side of the nut, and the second toothed ring is integrally formed on one side of the second connecting flange. The teeth of the first toothed ring and the second toothed ring are both wedge-shaped block structures.

[0011] Preferably, a sealing mechanism is provided at the connection between the sleeve and the insertion tube. The sealing mechanism includes an annular groove, a first annular sealing gasket, a second annular sealing gasket, and a third annular sealing gasket. An annular groove is formed on the inner side of the sleeve, and a first annular sealing gasket is provided on the inner side of the annular groove. A second annular sealing gasket is glued and fixed at the port of the insertion tube, and a third annular sealing gasket is sleeved on the outer side of the insertion tube.

[0012] Preferably, the inner side of the first annular sealing gasket has a cavity, and one side of the second annular sealing gasket has an arc-shaped structure. The outer walls of both the first and second annular sealing gaskets are in contact with the inner wall of the annular groove.

[0013] Compared with the prior art, this utility model provides a connecting flange for the end of an exhaust pipe in automobiles, which has the following advantages: 1. During installation, the first and second connecting flanges are welded onto the designated exhaust pipes. Then, the first and second connecting flanges are joined together, allowing the guide post to slide through the insertion guide hole. Simultaneously, the insert is slidably inserted into the inner side of the sleeve, completing the connection of the two flanges. Afterward, the hexagonal head of the hexagonal head bolt is placed inside the hexagonal groove, and then the hexagonal head bolt is threaded with a nut and tightened. During tightening, the first and second toothed rings mesh with each other, and the wedge block structure can prevent the nut from rotating, ensuring a stable connection between the first and second connecting flanges.

[0014] 2. After the sleeve is slidably inserted, the arc surface of the second annular sealing gasket fits against the first annular sealing gasket. When the nut is tightened, the arc surface of the second annular sealing gasket will push the first annular sealing gasket to squeeze it. Through the cavity setting of the first annular sealing gasket, the first annular sealing gasket will deform, and the first annular sealing gasket can fit better against the annular groove to ensure a better sealing effect. In addition, the sleeve, together with the second connecting flange, squeezes the third annular sealing gasket to achieve a secondary sealing effect and prevent exhaust gas leakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2This is a schematic diagram of the installation mechanism structure of this utility model; Figure 3 This is a schematic diagram of the back structure of the second connecting flange of this utility model; Figure 4 This is a cross-sectional view of the first connecting flange of this utility model; Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. First connecting flange; 2. Second connecting flange; 3. Sleeve; 4. Insert pipe; 5. Hexagonal groove; 6. Hexagonal head bolt; 7. Through hole; 8. Nut; 9. Guide post; 10. Guide hole; 11. First toothed ring; 12. Second toothed ring; 13. Annular groove; 14. First annular gasket; 15. Second annular gasket; 16. Third annular gasket. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Please see Figures 1-5 This embodiment provides an exhaust pipe end connection flange for automobiles, comprising a first connection flange 1 and a second connection flange 2. An installation mechanism is provided between the first connection flange 1 and the second connection flange 2. The installation mechanism includes a sleeve 3, an insert 4, a hexagonal groove 5, a hexagonal head bolt 6, a through hole 7, a nut 8, a guide post 9, and a guide hole 10. A sleeve 3 is integrally formed on one side of the first connection flange 1, and an insert 4 is integrally formed on one side of the second connection flange 2. A hexagonal groove 5 is formed on one side of the first connection flange 1, and a hexagonal head bolt is inserted through the inner side of the hexagonal groove 5. The bolt 6 has a through hole 7 on one side of the second connecting flange 2. One end of the hexagonal head bolt 6 is threaded with a nut 8. A guide post 9 is integrally formed on one side of the first connecting flange 1. A guide hole 10 is integrally formed on one side of the second connecting flange 2. An anti-detachment mechanism is provided at the connection between the second connecting flange 2 and the nut 8. The anti-detachment mechanism includes a first toothed ring 11 and a second toothed ring 12. The first toothed ring 11 is integrally formed on one side of the nut 8, and the second toothed ring 12 is integrally formed on one side of the second connecting flange 2. The teeth of the first toothed ring 11 and the second toothed ring 12 are both set with a wedge block structure.

[0019] During installation, the first connecting flange 1 and the second connecting flange 2 are respectively welded onto the designated exhaust pipe. Then, the first connecting flange 1 and the second connecting flange 2 are joined together, so that the guide post 9 slides through the insertion guide hole 10. At the same time, the insertion tube 4 is slidably inserted into the inner side of the sleeve 3 to complete the connection of the two flanges. Then, the hexagonal head of the hexagonal head bolt 6 is placed inside the hexagonal groove 5, and then the hexagonal head bolt 6 is threaded with the nut 8 and tightened to fix it. When tightening, the first toothed ring 11 and the second toothed ring 12 mesh with each other, and the wedge block structure can play the role of preventing the nut 8 from rotating, ensuring the stable connection of the first connecting flange 1 and the second connecting flange 2.

[0020] Furthermore, the guide post 9 slides through and is inserted into the guide hole 10, with the outer wall of the guide post 9 fitting against the inner wall of the guide hole 10. Both the guide post 9 and the guide hole 10 are provided in twos.

[0021] Furthermore, the hexagonal head of the hexagonal head bolt 6 is placed inside the hexagonal groove 5, and the inner wall of the hexagonal groove 5 is adapted to the outer wall of the hexagonal head.

[0022] Furthermore, the cannula 4 is slidably inserted into the inner side of the sleeve 3, and the outer wall of the cannula 4 is in contact with the inner wall of the sleeve 3.

[0023] To achieve a better sealing effect, a sealing mechanism is provided at the connection between the sleeve 3 and the insertion tube 4. The sealing mechanism includes an annular groove 13, a first annular sealing gasket 14, a second annular sealing gasket 15, and a third annular sealing gasket 16. An annular groove 13 is provided on the inner side of the sleeve 3, and a first annular sealing gasket 14 is provided on the inner side of the annular groove 13. A second annular sealing gasket 15 is glued and fixed at the port of the insertion tube 4, and a third annular sealing gasket 16 is sleeved on the outer side of the insertion tube 4.

[0024] After the insertion tube 4 slides into the sleeve 3, the arc surface of the second annular sealing gasket 15 fits against the first annular sealing gasket 14. When the nut 8 is tightened, the arc surface of the second annular sealing gasket 15 will push the first annular sealing gasket 14 to squeeze it. Through the cavity setting of the first annular sealing gasket 14, the first annular sealing gasket 14 will deform and fit better against the annular groove 13, ensuring a better sealing effect. In addition, the sleeve 3, together with the second connecting flange 2, squeezes the third annular sealing gasket 16 to achieve a secondary sealing effect and prevent exhaust gas leakage.

[0025] Furthermore, a cavity is provided on the inner side of the first annular sealing gasket 14, and one side of the second annular sealing gasket 15 is provided with an arc-shaped structure. The outer walls of both the first annular sealing gasket 14 and the second annular sealing gasket 15 are in contact with the inner wall of the annular groove 13.

[0026] The working principle of the above embodiment is as follows: During installation, the first connecting flange 1 and the second connecting flange 2 are respectively welded onto the designated exhaust pipe. Then, the first connecting flange 1 and the second connecting flange 2 are joined together, allowing the guide post 9 to slide through the insertion guide hole 10. At the same time, the insertion tube 4 is slidably inserted into the inner side of the sleeve 3, completing the connection of the two flanges. After that, the hexagonal head of the hexagonal head bolt 6 is placed inside the hexagonal groove 5, and then the hexagonal head bolt 6 is threaded with the nut 8 and tightened to fix it. During tightening, the first toothed ring 11 and the second toothed ring 12 mesh with each other, and the wedge block structure can prevent the nut 8 from rotating. To ensure a stable connection between the first connecting flange 1 and the second connecting flange 2, after the insert tube 4 slides into the sleeve 3, the arc surface of the second annular sealing gasket 15 fits against the first annular sealing gasket 14. When the nut 8 is tightened, the arc surface of the second annular sealing gasket 15 will be pushed to squeeze the first annular sealing gasket 14. Through the cavity setting of the first annular sealing gasket 14, the first annular sealing gasket 14 will deform, and the first annular sealing gasket 14 can fit better against the annular groove 13, ensuring a better sealing effect. In addition, the sleeve 3, together with the second connecting flange 2, squeezes the third annular sealing gasket 16 to achieve a secondary sealing effect and prevent exhaust gas leakage.

[0027] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flange for connecting the end of an exhaust pipe in an automobile, characterized in that: The system includes a first connecting flange (1) and a second connecting flange (2). An installation mechanism is provided between the first connecting flange (1) and the second connecting flange (2). The installation mechanism includes a sleeve (3), a plug (4), a hexagonal groove (5), a hexagonal head bolt (6), a through hole (7), a nut (8), a guide post (9), and a guide hole (10). A sleeve (3) is integrally formed on one side of the first connecting flange (1), and a plug (4) is integrally formed on one side of the second connecting flange (2). A hexagonal groove (5) is provided on one side of the first connecting flange (1), and a hexagonal head bolt (6) is inserted through the inner side of the hexagonal groove (5). A through hole (7) is provided on one side of the second connecting flange (2), and a nut (8) is threaded to one end of the hexagonal head bolt (6). A guide post (9) is integrally formed on one side of the first connecting flange (1), and a guide hole (10) is provided through the one side of the second connecting flange (2).

2. The exhaust pipe end connection flange for automobiles according to claim 1, characterized in that: The guide post (9) slides through the guide hole (10), and the outer wall of the guide post (9) fits against the inner wall of the guide hole (10). There are two guide posts (9) and two guide holes (10).

3. The exhaust pipe end connection flange for automobiles according to claim 1, characterized in that: The hexagonal head of the hexagonal head bolt (6) is placed inside the hexagonal groove (5), and the inner wall of the hexagonal groove (5) is adapted to the outer wall of the hexagonal head.

4. The exhaust pipe end connection flange for automobiles according to claim 1, characterized in that: The insertion tube (4) is slidably inserted into the inner side of the sleeve (3), and the outer wall of the insertion tube (4) is in contact with the inner wall of the sleeve (3).

5. A flange for connecting the end of an exhaust pipe in an automobile according to claim 1, characterized in that: An anti-detachment mechanism is provided at the connection between the second connecting flange (2) and the nut (8). The anti-detachment mechanism includes a first toothed ring (11) and a second toothed ring (12). The first toothed ring (11) is integrally formed on one side of the nut (8), and the second toothed ring (12) is integrally formed on one side of the second connecting flange (2). The teeth of the first toothed ring (11) and the second toothed ring (12) are both wedge-shaped block structures.

6. The exhaust pipe end connection flange for automobiles according to claim 1, characterized in that: A sealing mechanism is provided at the connection between the sleeve (3) and the insertion tube (4). The sealing mechanism includes an annular groove (13), a first annular sealing gasket (14), a second annular sealing gasket (15), and a third annular sealing gasket (16). An annular groove (13) is provided on the inner side of the sleeve (3). A first annular sealing gasket (14) is provided on the inner side of the annular groove (13). A second annular sealing gasket (15) is glued and fixed at the port of the insertion tube (4). A third annular sealing gasket (16) is sleeved on the outer side of the insertion tube (4).

7. A connecting flange for the end of an exhaust pipe in an automobile according to claim 6, characterized in that: The first annular sealing gasket (14) has a cavity on its inner side, and the second annular sealing gasket (15) has an arc-shaped structure on one side. The outer walls of the first annular sealing gasket (14) and the second annular sealing gasket (15) are both in contact with the inner wall of the annular groove (13).

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