A heat-insulating shell fixing structure for an automobile exhaust system

Abstract

This utility model relates to the field of automotive manufacturing technology and discloses a heat insulation shell fixing structure for an automotive exhaust system. It includes an outer shell, with extrusion plates fixedly connected to both sides of the outer shell, and mounting tubes fixedly connected to both sides of the outer shell. The inner wall of the mounting tubes is fixedly connected with internal threads. Supports are fixedly connected to the opposite sides of multiple mounting tubes, and interfaces are fixedly connected to the opposite ends of multiple support supports. A threaded post is threadedly connected to the inner wall of the internal threads, and a protruding tooth is fixedly connected to the outer wall of the threaded post. A buckle is engaged with the inner wall of the protruding tooth, and a rotating shaft is fixedly connected to the inner wall of the buckle. An installation structure is fixedly connected to the top of the outer shell. In this utility model, the outer shell first covers the exhaust system, causing the extrusion plates on its left and right sides to fit against the exhaust components. Then, through the mutual cooperation between subsequent components, the buckle is finally fixed by the rotating shaft and engages with the protruding tooth, preventing the threaded post from rotating in the opposite direction and avoiding loosening due to vibration, thus completing the locking and fixing process.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a heat insulation shell fixing structure for automobile exhaust systems. Background Technology

[0002] The insulation shell fixing structure for automotive exhaust systems plays a crucial role in the assembly and long-term stable operation of the exhaust system. It is used to accurately and firmly fix the insulation shell to the critical high-temperature parts of the exhaust system, completing the positioning and locking of the insulation shell and preventing it from shifting or falling off due to vibration during vehicle operation. This allows the insulation shell to continue to play its role in reducing heat loss and protecting surrounding components. The insulation shell fixing structure for automotive exhaust systems is mostly used in turbocharged vehicles, hybrid vehicles, and fuel vehicles with high requirements for exhaust thermal management.

[0003] When the insulation shell is precisely and firmly fixed to the critical high-temperature parts of the exhaust system, completing the positioning and locking of the insulation shell and preventing it from shifting or falling off due to vibration during vehicle operation, a special insulation shell fixing structure for automotive exhaust systems is required. Existing insulation shell fixing structures for automotive exhaust systems are mostly split bolt connections and single snap-fit ​​designs. During assembly, each bolt hole must be aligned and the snap-fit ​​position adjusted, which easily makes the assembly process cumbersome and time-consuming. Moreover, it requires extremely high precision in the machining of parts, which increases labor costs and material losses during the production process, significantly increasing production costs. At the same time, bolts are prone to loosening due to vibration, and snap-fit ​​structures are prone to aging and deformation due to high temperatures, resulting in reduced product quality and shortened service life. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a heat insulation shell fixing structure for automotive exhaust systems, aiming to improve the problem of increased production costs caused by cumbersome and time-consuming assembly in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heat insulation shell fixing structure for an automotive exhaust system, comprising an outer shell, extrusion plates fixedly connected to both the left and right sides of the outer shell, mounting tubes fixedly connected to both the left and right sides of the outer shell, internal threads provided on the inner wall of the mounting tubes, support columns fixedly connected to both the left and right sides of multiple mounting tubes, interfaces fixedly connected to both the left and right ends of multiple support columns, threaded posts threadedly connected to the inner wall of the internal threads, protruding teeth fixedly connected to the outer wall of the threaded posts, snap fasteners engaged on the inner wall of the protruding teeth, a rotating shaft fixedly connected to the inner wall of the snap fasteners, and an installation structure fixedly connected to the top of the outer shell.

[0006] As a further description of the above technical solution: The mounting structure includes a base, the bottom of which is fixedly connected to the top of the outer shell. A sleeve is fixedly connected to the inner wall of the base. Multiple locking pins are slidably connected to the inner wall of the sleeve. Multiple key slots are provided on the inner wall of the locking pins. A rotating pin is rotatably connected to the inner wall of the locking pins. A bidirectional screw is threadedly connected to the inner wall of the rotating pins. A limit block is fixedly connected to the outer wall of the rotating pins. Pins are engaged with the outer walls of the multiple locking pins. A car chassis is fixedly connected to the top of the pins.

[0007] As a further description of the above technical solution: The inner wall of the threaded column has multiple through holes, and a rotating handle is slidably connected to the inner wall of each through hole.

[0008] As a further description of the above technical solution: A connecting post is fixedly connected to the outer wall of the buckle, and a spring is fixedly connected to the outer wall of the connecting post.

[0009] As a further description of the above technical solution: A fixing rod is fixedly connected to the front side of the spring, and the left and right ends of the fixing rod are fixedly connected to the inner wall of the interface.

[0010] As a further description of the above technical solution: An unlocking rod is fixedly connected to the left end of the buckle, and the outer wall of the unlocking rod is rotatably connected to the inner wall of the interface.

[0011] As a further description of the above technical solution: A sealing ring is fixedly connected between adjacent shells, and nuts are threaded to the upper and lower sides of the shells.

[0012] As a further description of the above technical solution: A bushing is rotatably connected to the top of the outer casing near the edge, and a latch is rotatably connected to the outer wall of the bushing.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the outer shell is first used to cover the exhaust system so that the extrusion plate fits the exhaust components, initially eliminating gaps. The threaded column is then aligned with the internal thread and rotated, causing it to move inward. The inclined groove on the inner wall compresses and deforms the extrusion plate, which not only achieves initial fixation of the outer shell but also compensates for thermal expansion and contraction through deformation, preventing loosening due to temperature changes. The outer wall protrusion of the threaded column rotates with it, and the buckle is fixed by the rotating shaft and engages with the protrusion, preventing the threaded column from rotating in the opposite direction due to vibration, ensuring stable fixation. This structure can improve heat preservation efficiency, help the three-way catalytic converter quickly reach the working temperature, maintain turbine thermal efficiency to reduce energy consumption, reduce parts and assembly processes, reduce production and maintenance costs, comprehensively improve product quality, and extend service life.

[0014] 2. In this utility model, during installation, the base securely connects the mounting structure to the outer shell. After the pin is inserted into the sleeve, it contacts the locking pin. Rotating the rotating pin engages with the threaded double-ended screw, causing the locking pin to slide along the sleeve and move towards the pin. The key groove engages with the pin to enhance the tightness. The limit block prevents the rotating pin from shifting. After the locking pin clamps the pin, the installation is completed by fixing it to the car chassis through the pin. This structure allows for quick and labor-saving installation. The key groove engagement improves connection stability, adapts to vehicle vibration and temperature changes, reduces the risk of loosening, lowers maintenance costs, and extends service life. At the same time, it ensures the precise position of the insulation shell and ensures stable insulation effect. Attached Figure Description

[0015] Figure 1 This is a front perspective view of a heat insulation shell fixing structure for an automotive exhaust system proposed in this utility model; Figure 2 This is a partial structural illustration of a heat insulation shell fixing structure for an automotive exhaust system proposed in this utility model; Figure 3 This is a split view of the threaded column of the heat insulation shell fixing structure for an automotive exhaust system proposed in this utility model; Figure 4 This is a cross-sectional view of a heat insulation shell fixing structure for an automotive exhaust system proposed in this utility model; Figure 5 This is a split view of the locking pin of the heat insulation shell fixing structure for an automotive exhaust system proposed in this utility model.

[0016] Legend: 1. Outer shell; 2. Mounting structure; 201. Base; 202. Sleeve; 203. Locking pin; 204. Input groove; 205. Rotating pin; 206. Double-acting screw; 207. Limiting block; 208. Pin; 209. Automobile chassis; 3. Extrusion plate; 4. Mounting tube; 5. Internal thread; 6. Support; 7. Interface; 8. Threaded pin; 9. Raised tooth; 10. Snap-fit; 11. Shaft; 12. Through hole; 13. Rotating handle; 14. Connecting pin; 15. Spring; 16. Fixing rod; 17. Unlocking rod; 18. Sealing ring; 19. Nut; 20. Bushing; 21. Lock. 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] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 This utility model provides an embodiment of a heat insulation shell fixing structure for an automotive exhaust system, comprising an outer shell 1, extrusion plates 3 fixedly connected to both the left and right sides of the outer shell 1, mounting tubes 4 fixedly connected to both the left and right sides of the outer shell 1, an internal thread 5 provided on the inner wall of the mounting tube 4, support columns 6 fixedly connected to both the left and right sides of multiple mounting tubes 4, interfaces 7 fixedly connected to both the left and right ends of multiple support columns 6, a threaded post 8 threadedly connected to the inner wall of the internal thread 5, a protruding tooth 9 fixedly connected to the outer wall of the threaded post 8, a buckle 10 engaged with the inner wall of the protruding tooth 9, a rotating shaft 11 fixedly connected to the inner wall of the buckle 10, and an installation structure 2 fixedly connected to the top of the outer shell 1. Specifically, the outer shell 1 serves as the main body, enclosing key high-temperature components of the exhaust system to achieve basic insulation. The extrusion plates 3 on the left and right sides of the outer shell 1 enhance the fit between the outer shell 1 and the exhaust components, reducing gaps to ensure insulation performance. The inner walls of the mounting tubes 4 on the left and right sides are provided with internal threads 5, which engage with the threaded post 8. Rotating the threaded post 8 causes the inclined grooves on its inner wall to continuously compress the extrusion plates 3, thereby clamping the outer shell 1 on both sides. The support column 6 on the side of the mounting tube 4 away from the end is used to install the end interface 7, leaving a gap for subsequent operations. The protruding teeth 9 on the outer wall of the threaded post 8 engage with the buckle 10, which is fixed by the rotating shaft 11. This prevents the threaded post 8 from loosening due to vehicle vibration, maintains stability, and avoids displacement of the insulation shell, which could affect insulation and safety. The mounting structure 2 on the top can be quickly connected to the bottom of the vehicle, significantly shortening installation time and improving assembly efficiency.

[0019] Please see the appendix Figure 1 Appendix Figure 4 and attached Figure 5 The mounting structure 2 includes a base 201, the bottom of which is fixedly connected to the top of the outer shell 1. A sleeve 202 is fixedly connected to the inner wall of the base 201. Multiple locking pins 203 are slidably connected to the inner wall of the sleeve 202. Multiple key slots 204 are opened on the inner wall of the locking pins 203. A rotating pin 205 is rotatably connected to the inner wall of the locking pins 203. A bidirectional screw 206 is threadedly connected to the inner wall of the rotating pin 205. A limit block 207 is fixedly connected to the outer wall of the rotating pin 205. A pin 208 is engaged with the outer wall of the multiple locking pins 203. A car chassis 209 is fixedly connected to the top of the pin 208. Specifically, the base 201 connects the outer shell 1 and the sleeve 202, providing a supporting foundation for the installation structure 2. The sleeve 202 allows the locking pin 203 to slide, facilitating the adjustment of the position of the locking pin 203. Rotating the rotating pin 205 engages with the double-ended screw 206, causing the locking pin 203 to open. The key groove 204 enhances the engagement with the pin 208. The limit block 207 restricts the displacement of the rotating pin 205, preventing it from disengaging from the locking pin 203. The pin 208 connects the car chassis 209 and the locking pin 203, and is fixed by the clamping force of the locking pin 203, enabling the outer shell 1 to be quickly and stably installed at the bottom of the vehicle, preventing the insulation shell from shifting during driving.

[0020] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 The inner wall of the threaded column 8 has multiple through holes 12, and the inner wall of the through holes 12 is slidably connected to a rotating handle 13. The front side of the spring 15 is fixedly connected to a fixing rod 16, and the left and right ends of the fixing rod 16 are fixedly connected to the inner wall of the interface 7. The outer wall of the buckle 10 is fixedly connected to a connecting column 14, and the outer wall of the connecting column 14 is fixedly connected to a spring 15. Specifically, the through hole 12 on the inner wall of the threaded post 8 allows the rotating handle 13 to slide. Inserting the rotating handle 13 allows the threaded post 8 to be rotated effortlessly. After completion, it can be removed without taking up space. The connecting post 14 on the outer wall of the buckle 10 is connected to the spring 15. The spring 15 is fixed to the inner wall of the interface 7 by the fixing rod 16, which can provide continuous elastic force to the buckle 10, ensuring that it is always tightly engaged with the protruding tooth 9, effectively preventing the threaded post 8 from loosening in the opposite direction due to vibration, and improving the fixing stability. Please see the appendix Figure 1 and attached Figure 2 The left end of the buckle 10 is fixedly connected to the unlocking rod 17. The outer wall of the unlocking rod 17 is rotatably connected to the inner wall of the interface 7. The top of the outer shell 1 is rotatably connected to the bushing 20 near the edge. The outer wall of the bushing 20 is rotatably connected to the lock 21. A sealing ring 18 is fixedly connected between adjacent outer shells 1. Nuts 19 are threadedly connected to the upper and lower sides of the outer shell 1. Specifically, the unlocking lever 17 at the left end of the buckle 10 can rotate around the interface 7. Moving the unlocking lever 17 can quickly separate the buckle 10 from the tooth 9, making it easy to disassemble the threaded post 8. The bushing 20 at the top of the outer shell 1 supports the rotation of the lock 21. The lock 21 can help fix the adjacent outer shell 1. The sealing ring 18 between the adjacent outer shell 1 can seal the gap and reduce heat loss. The nuts 19 on the upper and lower sides of the outer shell 1 can further tighten the outer shell 1 and improve the overall fixation stability.

[0021] Working principle: First, the outer shell 1 covers the exhaust system, so that the extrusion plates 3 on its left and right sides fit the exhaust components. Then, the threaded column 8 is aligned with the internal thread 5 on the inner wall of the mounting pipe 4 and rotated. The thread engagement drives the threaded column 8 to move inward. The inclined groove on its inner wall extrudes the extrusion plate 3, causing the extrusion plate 3 to deform and clamp the outer shell 1, thus achieving the initial fixation of the outer shell 1. The support column 6 on the side of the mounting pipe 4 supports the interface 7 and leaves room for operation. The protruding teeth 9 on the outer wall of the threaded column 8 rotate with it. The buckle 10 is fixed by the rotating shaft 11 and engages with the protruding teeth 9 to prevent the threaded column 8 from rotating in the opposite direction, avoid vibration causing loosening, and complete the stable fixation. During installation, first fix the mounting structure 2 to the outer shell 1 using the base 201, then insert the pin 208 into the sleeve 202. The bottom of the pin 208 contacts the locking pin 203. Rotate the rotating pin 205, which engages with the threaded screw 206, causing the locking pins 203 on both sides to slide along the inner wall of the sleeve 202 and move closer to the pin 208. The input groove 204 on the inner wall of the locking pin 203 engages with the outer wall of the pin 208. The limiting block 207 prevents the rotating pin 205 from shifting. Once the locking pin 203 clamps the pin 208, the installation of the vehicle bottom is completed by fixing the pin 208 to the vehicle chassis 209.

[0022] 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. A heat insulation shell fixing structure for an automotive exhaust system, comprising an outer shell (1), characterized in that: The left and right sides of the outer shell (1) are fixedly connected to extrusion plates (3), the left and right sides of the outer shell (1) are fixedly connected to mounting tubes (4), the inner wall of the mounting tubes (4) is provided with internal threads (5), the left and right sides of multiple mounting tubes (4) are fixedly connected to support columns (6), the left and right ends of multiple support columns (6) are fixedly connected to interfaces (7), the inner wall of the internal threads (5) is threadedly connected to threaded columns (8), the outer wall of the threaded columns (8) is fixedly connected to protruding teeth (9), the inner wall of the protruding teeth (9) is engaged with buckles (10), the inner wall of the buckles (10) is fixedly connected to rotating shafts (11), and the top of the outer shell (1) is fixedly connected to an installation structure (2).

2. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: The mounting structure (2) includes a base (201), the bottom of which is fixedly connected to the top of the outer shell (1). A sleeve (202) is fixedly connected to the inner wall of the base (201). Multiple locking pins (203) are slidably connected to the inner wall of the sleeve (202). Multiple key slots (204) are provided on the inner wall of the locking pins (203). A rotating pin (205) is rotatably connected to the inner wall of the locking pins (203). A bidirectional screw (206) is threadedly connected to the inner wall of the rotating pins (205). A limit block (207) is fixedly connected to the outer wall of the rotating pins (205). A pin (208) is engaged with the outer wall of the multiple locking pins (203). A car chassis (209) is fixedly connected to the top of the pin (208).

3. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: The inner wall of the threaded column (8) is provided with multiple through holes (12), and a rotating handle (13) is slidably connected to the inner wall of the through holes (12).

4. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: The outer wall of the buckle (10) is fixedly connected to a connecting post (14), and the outer wall of the connecting post (14) is fixedly connected to a spring (15).

5. The heat insulation shell fixing structure for an automotive exhaust system according to claim 4, characterized in that: A fixing rod (16) is fixedly connected to the front side of the spring (15), and the left and right ends of the fixing rod (16) are fixedly connected to the inner wall of the interface (7).

6. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: The left end of the buckle (10) is fixedly connected to an unlocking rod (17), and the outer wall of the unlocking rod (17) is rotatably connected to the inner wall of the interface (7).

7. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: A sealing ring (18) is fixedly connected between adjacent shells (1), and nuts (19) are threadedly connected to the upper and lower sides of the shells (1).

8. The heat insulation shell fixing structure for an automotive exhaust system according to claim 1, characterized in that: The top of the outer casing (1) is rotatably connected to a bushing (20) near the edge, and the outer wall of the bushing (20) is rotatably connected to a latch (21).

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