A heat shield for a valve of an exhaust pipe of an automobile

Abstract

This invention discloses a heat insulation cover for automotive exhaust pipe valves, relating to the field of exhaust pipe valve heat insulation technology. It includes a first cover fixed to the outer circumference of the exhaust pipe body, with a second cover fixedly connected to one end of the first cover. The outer circumference of the second cover is provided with a drive assembly for opening and closing a valve plate inside the exhaust pipe body. The interior of the second cover contains a heat dissipation assembly and a displacement assembly for adjusting the position of the heat dissipation assembly. The inner circumference of the first cover has a heat insulation groove, and a heat insulation tile is disposed inside the heat insulation groove. The thickness of the heat insulation tile gradually decreases from the end away from the air intake end of the exhaust pipe body. The heat dissipation assembly includes fan blades disposed inside the second cover. This invention achieves dynamic matching of heat insulation and heat dissipation capabilities under different valve operating conditions, ensuring the operational safety and stability of the exhaust system and related vehicle components.

Description

Technical Field

[0001] This invention relates to the field of exhaust pipe valve heat insulation technology, and more specifically, to a heat insulation cover for automotive exhaust pipe valves. Background Technology

[0002] The exhaust pipe valve is a key control component in modern automotive exhaust systems. Its core function is to dynamically adjust the exhaust gas emission path and quantity based on engine operating conditions (such as start-stop, speed, and load), thereby achieving multiple goals such as optimizing engine power performance, reducing exhaust noise, improving fuel economy, and meeting emission regulations under different operating conditions. During engine start-up and high-load scenarios requiring efficient exhaust, the exhaust pipe valve opens, guiding high-temperature exhaust gas out quickly. During engine idling, shutdown, or specific low-load conditions, the exhaust pipe valve closes, blocking the main exhaust gas emission channel or switching to a bypass path. Because the exhaust pipe valve directly contacts and controls high-temperature exhaust gas, its surrounding area easily forms a high-temperature radiation zone. If this area is not effectively insulated, the high temperature will be directly transferred to the vehicle chassis, body panels, wiring harnesses, and surrounding plastic components, potentially leading to accelerated component aging, performance failure, and even safety hazards. Therefore, heat insulation protection for the exhaust pipe valve and the corresponding exhaust pipe section is crucial.

[0003] A search revealed Chinese invention patent CN113803146A, which discloses an automotive exhaust pipe heat insulation system and an automotive vehicle incorporating the same. The system includes a heat insulation component, a rotating component, and a driving component arranged sequentially. The heat insulation component is fixedly connected to the rotating component. The rotating component rotates under the drive of the driving component, causing the heat insulation component to rotate relative to the automotive exhaust pipe. This invention provides a simple automotive exhaust pipe heat insulation system that allows the position of the heat insulation component to be adjusted according to the different amounts of heat released from the exhaust pipe, achieving both high-temperature heat insulation and low-temperature waste heat utilization.

[0004] Based on the aforementioned patents, the existing technology still has the following shortcomings: First, the system is a general-purpose exhaust pipe insulation design, which does not consider the significant differences in heat distribution when the exhaust pipe valve is open and closed. That is, when the valve is open, high-temperature exhaust gas flows through rapidly, and heat concentrates and accumulates at the end of the exhaust pipe; when the valve is closed, the exhaust gas flow is obstructed, and heat continues to accumulate on one side of the valve plate. At the same time, it can only achieve overall rotation of the insulation component, and cannot accurately adjust the protective position according to the local heat distribution under different valve operating conditions, resulting in a serious lack of targeted heat dissipation and insulation. Second, the system can only achieve passive insulation by switching the position of the insulation component. The first problem is that the heat shield for automotive exhaust pipe valves, lacking a structure that actively accelerates heat dissipation, cannot quickly dissipate the high-temperature heat accumulated at the exhaust pipe end under high engine load and fully open valve conditions. This easily leads to the valve body and connecting components being under high-temperature stress for extended periods, shortening their service life. Secondly, the uniform thickness of the heat insulation component makes it unsuitable for adapting to the heat gradient distribution in different areas of the exhaust pipe's axial direction. Meeting the high-temperature insulation requirements results in excessive overall weight, while prioritizing lightweight design leads to redundant insulation in low-temperature areas and insufficient insulation in high-temperature areas, making it difficult to balance protective performance with overall vehicle lightweighting requirements. Therefore, a heat shield for automotive exhaust pipe valves is urgently needed to solve these problems. Summary of the Invention

[0005] In view of the problems in related technologies, the present invention proposes a heat insulation cover for automobile exhaust pipe valves to overcome the above-mentioned technical problems existing in the prior art.

[0006] The technical solution of this invention is implemented as follows: A heat insulation cover for an automotive exhaust pipe valve includes a first cover fixed to the outer circumference of the exhaust pipe body, a second cover fixedly connected to one end of the first cover, and a drive assembly for opening and closing a valve plate inside the exhaust pipe body provided on the outer circumference of the second cover. The interior of the second cover is provided with a heat dissipation component and a displacement component for adjusting the position of the heat dissipation component; The inner circumferential wall of the first cover is provided with a heat insulation groove, and a heat insulation tile is provided inside the heat insulation groove. The thickness of the heat insulation tile gradually decreases along the end away from the air inlet end of the exhaust pipe.

[0007] Preferably, the heat dissipation assembly includes fan blades disposed inside the second cover body, one side of the outer wall of the fan blades is in contact with one side of the outer wall of the valve plate, the cross-section of the fan blades is fan-shaped, and the outer wall of the fan blades away from the valve plate is fixedly connected with heat dissipation fins distributed at equal intervals, and one side of the outer wall of the heat dissipation fins is provided with heat dissipation grooves distributed at equal intervals, the cross-section of the heat dissipation grooves is U-shaped, and the interior of the second cover body is provided with a rotating assembly for adjusting the tilt angle of the fan blades.

[0008] Preferably, the drive assembly includes a rotating shaft rotatably connected to the outer circumferential wall of the second cover, one end of the rotating shaft located inside the second cover being fixedly connected to a valve plate, a crank being fixedly connected to the end of the rotating shaft away from the valve plate, a connecting rod being rotatably connected to the top outer wall of the crank, and a gear being rotatably connected to the other end of the connecting rod.

[0009] Preferably, a protective shell is fixedly connected to the outer circumferential wall of the second cover, and one end of the toothed rod passes through the inner walls of both sides of the protective shell.

[0010] Preferably, the rotating assembly includes a vertical plate fixedly connected to one end of the fan blade, a third rotating column fixedly connected to one outer wall of the vertical plate, a second gear disk fixedly connected to the outer circumferential wall of the third rotating column, an annular frame provided on one side of the valve plate, the third rotating column rotatably connected to the annular frame, an annular groove provided on the outer circumferential wall of the annular frame, a toothed ring plate rotatably connected inside the annular groove, and a toothed groove provided on one side of the toothed ring plate that meshes with the second gear disk.

[0011] Preferably, a connecting seat is fixedly connected to the end of the fan blade away from the vertical plate, a ball head shaft is fixedly connected to one outer wall of the connecting seat, a rotating seat is provided inside the second cover, a ball head groove is provided on the outer circumferential wall of the rotating seat, the ball head shaft is rotatably connected to the ball head groove, a first rotating column is fixedly connected to one end of the rotating seat, and a horizontal plate is rotatably connected to the end of the first rotating column away from the rotating seat.

[0012] Preferably, a first gear disc meshes with one side of the outer wall of the rack, a second rotating column is fixedly connected to the inner circumference of the first gear disc, a first helical gear is fixedly connected to the outer circumference of the second rotating column, a second helical gear meshes with the outer circumference of the first helical gear, a second threaded screw is fixedly connected to one side of the outer wall of the second helical gear, a second threaded sleeve is threadedly connected to the outer circumference of the second threaded screw located inside the second cover, a second connecting plate is fixedly connected to the inner circumference of the second cover, the second threaded screw is rotatably connected to the second connecting plate, a second guide post is fixedly connected to one side of the outer wall of the second connecting plate, a second guide block is slidably connected to the outer circumference of the second guide post, a reinforcing post is fixedly connected to one side of the outer wall of the first cover, the other end of the reinforcing post is fixedly connected to the second threaded sleeve, a connecting frame is fixedly connected to the bottom outer wall of the second guide block, a toothed plate is fixedly connected to one side of the connecting frame, and the toothed plate cooperates with the toothed ring plate.

[0013] Preferably, a third connecting plate is fixedly connected to one inner wall of the protective shell, and the third connecting plate is rotatably connected to the second rotating column.

[0014] Preferably, the displacement assembly includes a worm gear fixedly connected to the outer circumference of the second rotating column, a worm wheel meshing with the outer circumference of the worm gear, a first threaded screw fixedly connected to the inner circumference of the worm wheel, a first threaded sleeve threadedly connected to the outer circumference of the first threaded screw, the first threaded sleeve being fixedly connected to the cross plate, and a first connecting plate fixedly connected to one end of the second cover, the first connecting plate being rotatably connected to the first threaded screw.

[0015] Preferably, a first guide post is fixedly connected to one side of the outer wall of another first connecting plate, a first guide block is slidably connected to the outer circumferential wall of the first guide post, and the first guide block is fixedly connected to the cross plate.

[0016] The beneficial effects of this invention are: This invention provides a heat insulation cover for an automotive exhaust pipe valve. Through a displacement component, the position of the heat dissipation component and the tilt angle of the fan blades can be adjusted in a coordinated manner, thereby adapting to the heat dissipation requirements under different opening and closing conditions of the valve plate. Specifically, the displacement component adjusts the overall position of the heat dissipation component according to the opening and closing state of the valve plate. When the rack drives the first gear disc and the second rotating column to rotate, the worm gear on the second rotating column meshes with the worm wheel, driving the first threaded screw to rotate. This causes the first threaded sleeve to move synchronously with the horizontal plate and the connected fan blades and other heat dissipation components. When the valve plate is open and heat accumulates at the end of the exhaust pipe, the heat dissipation component is precisely moved to the core heat area. When the valve plate is closed and heat accumulates on one side of the valve plate, the fan blades are brought into contact with the valve plate, achieving dynamic adaptation of the heat dissipation position and improving the targeted nature of heat dissipation.

[0017] This invention provides a heat insulation cover for an automotive exhaust pipe valve. Through a rotating assembly that works in conjunction with a displacement assembly to adjust the tilt angle of the fan blades, the second rotating column rotates, triggering a first helical gear, a second helical gear, and a second threaded screw. This drives the second threaded sleeve and a toothed plate to move. After the toothed plate meshes with the toothed ring plate, it drives the fan blades to deflect via tooth grooves, a second gear disc, and other components. When the valve plate is open, the fan blades can tilt, using the high-temperature exhaust gas to rotate and accelerate airflow inside the second cover. Simultaneously, the heat exchange area is increased by the U-shaped heat dissipation grooves on the fan blades, quickly dissipating heat and reducing heat accumulation at the ends. When the valve plate is closed, the fan blades return to a horizontal position, making full contact with the valve plate to efficiently absorb the accumulated heat on the valve plate side. The heat is then discharged through the heat dissipation fins, achieving dynamic switching of heat dissipation capacity. Combined with the gradually thickening heat insulation tiles of the first cover, this invention solves the shortcomings of traditional heat insulation covers, such as a single heat dissipation path and inability to adapt to dynamic valve conditions. It also reduces high-temperature stress on the valve and connecting components, extending the overall service life of the device.

[0018] This invention provides a heat insulation cover for automotive exhaust pipe valves. Through a technical solution using heat insulation tiles with a thickness that gradually decreases in thickness along the direction away from the exhaust pipe's intake end, located within the heat insulation groove on the inner circumference of the first cover, differentiated heat insulation protection can be achieved for different areas of the exhaust pipe. This allows the intake end to effectively block the heat from high-temperature exhaust gases with thicker heat insulation tiles, preventing heat transfer to surrounding components such as the chassis and body panels, thus avoiding accelerated aging or performance failure. Simultaneously, while meeting basic heat insulation requirements, the thinner heat insulation tiles in areas away from the intake end achieve weight reduction, improving both the installation stability of the automotive exhaust system and fuel economy. Furthermore, it reduces thermal stress caused by excessive local temperature differences in the first cover and the heat insulation tiles themselves, extending their service life. This effectively solves the problem that traditional heat insulation structures cannot adapt to the different heat distributions in different areas of the exhaust pipe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall end face structure of the present invention.

[0021] Figure 2 This is a top view of the second cover structure of the present invention.

[0022] Figure 3 For the present invention Figure 2 A magnified structural diagram of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the internal structure of the protective shell of the present invention.

[0024] Figure 5 This is a schematic diagram of the overall half-sectional planar structure of the present invention.

[0025] Figure 6 For the present invention Figure 5 A magnified structural diagram at point B in the middle.

[0026] Figure 7 This is a schematic diagram of the overall half-sectional structure of the present invention.

[0027] Figure 8 For the present invention Figure 7 A magnified structural diagram at point C.

[0028] In the picture: 1. Exhaust pipe body; 2. First cover; 3. Protective shell; 4. Gear rack; 5. Crank; 6. Connecting rod; 7. Rotating shaft; 8. Second cover; 9. First connecting plate; 10. First guide post; 11. First guide block; 12. Gear plate; 13. Horizontal plate; 14. First rotating post; 15. Gear ring plate; 16. First threaded screw; 17. First threaded sleeve; 18. Second rotating post; 19. Worm gear; 20. Worm; 21. Second guide block; 22. Second guide post; 23. Second connecting plate; 24. 25. Second threaded screw; 26. Second threaded sleeve; 27. Connecting frame; 28. Fan blade; 29. ​​Heat sink; 30. Heat dissipation groove; 31. Connecting seat; 32. Rotating seat; 33. Third connecting plate; 34. Valve plate; 35. First gear disc; 36. Second helical gear; 37. Heat insulation tile; 38. Heat insulation groove; 39. Ball head shaft; 40. Ball head groove; 41. Second gear disc; 42. Third rotating column; 43. Vertical plate; 44. Gear groove; 45. Circular frame; 46. Circular groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0030] Please see Figures 1-8 A heat insulation cover for an automobile exhaust pipe valve includes a first cover 2 fixed to the outer circumference of an exhaust pipe body 1, a second cover 8 fixedly connected to one end of the first cover 2, and a drive assembly for opening and closing the valve plate 33 inside the exhaust pipe body 1 provided on the outer circumference of the second cover 8. The second cover 8 is equipped with a heat dissipation component and a displacement component for adjusting the position of the heat dissipation component, which realizes dynamic matching of heat insulation and heat dissipation capacity under different working conditions of the valve, and ensures the operational safety and stability of the exhaust system and related vehicle components. The inner circumferential wall of the first cover 2 is provided with a heat insulation groove 38, and a heat insulation tile 37 is installed inside the heat insulation groove 38. The thickness of the heat insulation tile 37 gradually decreases from the end away from the air inlet end of the exhaust pipe 1. Through this technical solution of heat insulation tiles 37 with a thickness that gradually decreases from the air inlet end of the exhaust pipe 1 installed in the heat insulation groove 38 of the inner circumferential wall of the first cover 2, differentiated heat insulation protection can be achieved for different areas of the exhaust pipe 1. The thicker heat insulation tile 37 at the air inlet end can effectively block the heat of the high-temperature exhaust gas and prevent heat transfer to the exhaust pipe 1. The aging or performance failure of peripheral components such as the car chassis and body sheet metal is accelerated. At the same time, the parts far away from the air intake end can meet the basic heat insulation requirements, while the thinner heat insulation tile 37 can achieve the weight reduction of the device, reduce the overall weight, and take into account the installation stability of the car exhaust system and the fuel economy of the whole vehicle. At the same time, it can also reduce the thermal stress caused by excessive local temperature difference of the first cover 2 and the heat insulation tile 37, extend their service life, and effectively solve the problem that traditional heat insulation structures cannot adapt to the heat distribution differences in different areas of the exhaust pipe.

[0031] Furthermore, the heat dissipation component includes a fan blade 27 disposed inside the second cover 8. One side of the outer wall of the fan blade 27 is in contact with one side of the outer wall of the valve plate 33. The cross-section of the fan blade 27 is fan-shaped. The outer wall of the fan blade 27 away from the valve plate 33 is fixedly connected with heat dissipation fins 28 distributed at equal intervals. One side of the outer wall of the heat dissipation fins 28 is provided with heat dissipation grooves 29 distributed at equal intervals. The cross-section of the heat dissipation grooves 29 is U-shaped. The interior of the second cover 8 is provided with a rotating component for adjusting the tilt angle of the fan blade 27. The heat dissipation fins 28 with U-shaped heat dissipation grooves 29 on the surface of the fan blade 27 can increase the contact area with the air, quickly dissipate the heat conducted by the valve plate 33 and the exhaust pipe body 1, and achieve efficient heat dissipation. Moreover, the tilted fan blade 27 can also guide the direction of exhaust gas flow, reduce the accumulation of heat around the valve plate 33, and improve the heat insulation effect of the entire heat insulation cover on the exhaust pipe valve.

[0032] Furthermore, the drive assembly includes a rotating shaft 7 rotatably connected to the outer circumferential wall of the second cover 8. One end of the rotating shaft 7 located inside the second cover 8 is fixedly connected to the valve plate 33, and the other end of the rotating shaft 7 away from the valve plate 33 is fixedly connected to a crank 5. A connecting rod 6 is rotatably connected to the top outer wall of the crank 5, and a rack 4 is rotatably connected to the other end of the connecting rod 6. The other end of the rack 4 is connected to an external drive device, such as a hydraulic rod. The reciprocating motion of the rack 4 is driven by the extension and retraction of the hydraulic rod. When the valve plate 33 inside the exhaust pipe body 1 needs to be opened, the hydraulic rod at the other end of the rack 4 is activated (the hydraulic rod is one of the drive components in the prior art, so it is not shown in the accompanying drawings). At this time, the rack 4 is subjected to tension, which will drive the connecting rod 6 to move together. At this time, through the linkage between the crank 5 and the connecting rod 6, the rotating shaft 7 can be rotated, thereby driving the valve plate 33 to open quickly.

[0033] Furthermore, a protective shell 3 is fixedly connected to the outer circumference of the second cover 8, and one end of the toothed rod 4 passes through the inner walls on both sides of the protective shell 3, ensuring the stability of the toothed rod 4 during the lateral movement process.

[0034] Furthermore, the rotating assembly includes a vertical plate 43 fixedly connected to one end of the fan blade 27. A third rotating column 42 is fixedly connected to one outer wall of the vertical plate 43. A second gear disk 41 is fixedly connected to the outer circumferential wall of the third rotating column 42. A circular frame 45 is provided on one side of the valve plate 33. The third rotating column 42 is rotatably connected to the circular frame 45. A circular groove 46 is provided on the outer circumferential wall of the circular frame 45. A gear ring plate 15 is rotatably connected inside the circular groove 46. A toothed groove 44 that meshes with the second gear disk 41 is provided on one side of the gear ring plate 15. The end of the fan blade 27 away from the vertical plate 43 is fixedly connected to... A connecting seat 30 is connected, and a ball head shaft 39 is fixedly connected to one outer wall of the connecting seat 30. A rotating seat 31 is provided inside the second cover 8. A ball head groove 40 is opened on the outer circumference of the rotating seat 31. The ball head shaft 39 is rotatably connected to the ball head groove 40. A first rotating column 14 is fixedly connected to one end of the rotating seat 31. A horizontal plate 13 is rotatably connected to the end of the first rotating column 14 away from the rotating seat 31. When the valve plate 33 inside the exhaust pipe body 1 needs to be closed, the hydraulic rod is restarted and performs a reset movement. At this time, the heat dissipation assembly will move laterally in the opposite direction. During the process of the heat dissipation assembly moving laterally in the opposite direction, the toothed ring plate... 15 will mesh with the toothed plate 12 again and rotate in the opposite direction, thereby enabling the multiple fan blades 27 to return from the tilted state to the horizontal state. As the displacement component continues to operate, the multiple horizontal fan blades 27 will continue to contact the closed valve plate 33. Since the valve plate 33 is in the closed state, the high-temperature exhaust gas cannot be discharged and will accumulate at the port of the exhaust pipe 1 and on one side of the valve plate 33. At this time, through the full contact between the fan blades 27 and the valve plate 33, the large amount of heat accumulated at the valve plate 33 and the exhaust pipe port can be effectively absorbed. Then, the heat is dissipated through the U-shaped heat dissipation grooves 29 on the fan blades 27. The heat sink 28 quickly conducts heat to the air inside the second cover 8, realizing the rapid removal of heat from the exhaust pipe valve. This not only prevents the heat from the high-temperature exhaust gas from spreading to the chassis, sheet metal, wiring harness and other peripheral components, thus preventing accelerated aging or failure of parts, but also reduces the high-temperature stress on the valve plate 33 and the connecting structure, extending their service life. At the same time, it solves the drawback that traditional fixed heat insulation covers cannot meet the higher heat insulation requirements when the valve plate 33 is closed, realizing dynamic matching of heat insulation and heat dissipation capabilities under different valve operating conditions, and ensuring the operational safety and stability of the exhaust system and related vehicle components.

[0035] Furthermore, the displacement assembly includes a worm gear 20 fixedly connected to the outer circumferential wall of the second rotating column 18. A worm wheel 19 meshes with the outer circumferential wall of the worm gear 20. A first threaded screw 16 is fixedly connected to the inner circumferential wall of the worm wheel 19. A first threaded sleeve 17 is threadedly connected to the outer circumferential wall of the first threaded screw 16. The first threaded sleeve 17 is fixedly connected to the horizontal plate 13. A first connecting plate 9 is fixedly connected to one end of the second cover 8. The first connecting plate 9 is rotatably connected to the first threaded screw 16. The worm gear 20 will drive the worm wheel 19 to rotate together. When the worm wheel 19 rotates, it can drive the first threaded screw 16 to rotate. During the rotation of the first threaded screw 16, the first threaded sleeve 17 threadedly connected to it will drive the horizontal plate 13 to move laterally together. When the horizontal plate 13 moves laterally, it can drive the entire heat dissipation assembly to move.

[0036] Furthermore, a first gear disc 34 meshes with one side of the outer wall of the rack 4. A second rotating column 18 is fixedly connected to the inner circumference of the first gear disc 34. A first helical gear 35 is fixedly connected to the outer circumference of the second rotating column 18. A second helical gear 36 meshes with the outer circumference of the first helical gear 35. A second threaded screw 24 is fixedly connected to one side of the outer wall of the second helical gear 36. A second threaded sleeve 25 is threadedly connected to the outer circumference of the second threaded screw 24 located inside the second cover 8. A second connecting plate 23 is fixedly connected to the inner circumference of the second cover 8. The second threaded screw 24 is rotatably connected to the second connecting plate 23. A second guide post 22 is fixedly connected to one outer wall of the second connecting plate 23. A second guide block 21 is slidably connected to the outer circumferential wall of the second guide post 22. A reinforcing post is fixedly connected to one outer wall of the first cover 2. The other end of the reinforcing post is fixedly connected to the second threaded sleeve 25. A connecting frame 26 is fixedly connected to the bottom outer wall of the second guide block 21. A toothed plate 12 is fixedly connected to one side of the connecting frame 26. The toothed plate 12 cooperates with the toothed ring plate 15. As the second rotating column 18 rotates, it can drive... The first helical gear 35 rotates together with the second helical gear 36. The rotation of the second helical gear 36 drives the second threaded screw 24 to rotate. During the rotation of the second threaded screw 24, the threaded sleeve 25 connected to it moves horizontally. Simultaneously, the second threaded sleeve 25 is fixedly connected to the toothed plate 12 via the second guide block 21 and the connecting bracket 26. Therefore, when the toothed ring plate 15 in the heat dissipation assembly moves to one side of the toothed plate 12, the toothed plate 12 also moves laterally. At this time, the horizontal movement... The moving toothed plate 12 meshes with the toothed ring plate 15, thereby driving the toothed ring plate 15 to rotate. When the toothed ring plate 15 rotates, it can drive the tooth groove 44 on the other side to rotate together. At this time, the tooth groove 44 will drive the second gear disk 41 to rotate together. When the second gear disk 41 rotates, it can drive the vertical plate 43 and the fan blades 27 to rotate together. At this time, multiple fan blades will rotate from a horizontal state to an inclined state. At this time, the high-temperature exhaust gas will drive multiple inclined fan blades 27 to rotate synchronously. During the rotation of the fan blades 27, the air flow inside the second cover 8 can be accelerated.

[0037] Furthermore, a third connecting plate 32 is fixedly connected to one inner wall of the protective shell 3. The third connecting plate 32 is rotatably connected to the second rotating column 18. The stability of the second rotating column 18 during rotation can be effectively guaranteed by the third connecting plate 32.

[0038] Furthermore, a first guide post 10 is fixedly connected to one side of the outer wall of another first connecting plate 9, and a first guide block 11 is slidably connected to the outer circumference of the first guide post 10. The first guide block 11 is fixedly connected to the horizontal plate 13, and the stable horizontal movement of the displacement component can be effectively ensured through the first guide block 11.

[0039] In summary, with the aid of the above-mentioned technical solution of the present invention, when the valve plate 33 inside the exhaust pipe body 1 needs to be opened, the hydraulic rod at the other end of the rack 4 is activated (the hydraulic rod is one of the driving components in the prior art, so it is not shown in the accompanying drawings). At this time, the rack 4 is subjected to tension, which drives the connecting rod 6 to move together. At this time, through the linkage between the crank 5 and the connecting rod 6, the rotating shaft 7 can be driven to rotate, which in turn drives the valve plate 33 to open quickly. During the lateral movement of the rack 4, the first gear disk 34 can be driven to rotate. When the first gear disk 34 rotates, the second rotating column 18 can be driven to rotate together. When the second rotating column 18 rotates... During the movement, the worm gear 20 can rotate together, which in turn drives the worm wheel 19 to rotate. When the worm wheel 19 rotates, it drives the first threaded screw 16 to rotate. As the first threaded screw 16 rotates, the first threaded sleeve 17, which is threaded to it, drives the horizontal plate 13 to move laterally. When the horizontal plate 13 moves laterally, it drives the entire heat dissipation assembly to move. As the second rotating column 18 rotates, it drives the first helical gear 35 to rotate together. When the first helical gear 35 rotates, it drives the second helical gear 36 to rotate together. The rotation of the second helical gear 36 drives the second threaded screw 24 to rotate together. When the second threaded screw 24 rotates, it can cause the second threaded sleeve 25, which is threaded to it, to move horizontally. Simultaneously, the second threaded sleeve 25 is fixedly connected to the toothed plate 12 via the second guide block 21 and the connecting bracket 26. Therefore, when the toothed ring plate 15 in the heat dissipation assembly moves to one side of the toothed plate 12, the toothed plate 12 will also move laterally. At this time, the laterally moving toothed plate 12 meshes with the toothed ring plate 15, thereby driving the toothed ring plate 15 to rotate. When the toothed ring plate 15 rotates, it can drive the tooth groove 44 on its other side to rotate as well. At this time, the tooth groove 44 will drive the second gear disk 41 to rotate as well. When the second gear disk 41 rotates, it can drive... The vertical plate 43 and the fan blades 27 rotate together. At this time, multiple fan blades will rotate from a horizontal state to an inclined state. The high-temperature exhaust gas will drive multiple inclined fan blades 27 to rotate synchronously. During the rotation of the fan blades 27, the air flow inside the second cover 8 can be accelerated. At the same time, the heat sink 28 with U-shaped heat dissipation grooves 29 on its surface can increase the contact area with the air and quickly dissipate the heat conducted by the valve plate 33 and the exhaust pipe body 1 to achieve efficient heat dissipation. Moreover, the inclined fan blades 27 can also guide the direction of exhaust gas flow, reduce the accumulation of heat around the valve plate 33, and improve the heat insulation effect of the entire heat insulation cover on the exhaust pipe valve. When the valve plate 33 inside the exhaust pipe body 1 needs to be closed, the hydraulic rod is activated again and performs a reset movement. At this time, the heat dissipation assembly will move laterally in the opposite direction. During the reverse lateral movement of the heat dissipation assembly, the toothed ring plate 15 will mesh with the toothed plate 12 again and rotate in the opposite direction, thereby enabling multiple fan blades 27 to return from the inclined state to the horizontal state. As the displacement assembly continues to move, until the multiple horizontal fan blades 27 come into contact with the closed valve plate 33, the high-temperature exhaust gas cannot be discharged after the valve plate 33 is in the closed state and will accumulate at the port of the exhaust pipe body 1 and on one side of the valve plate 33. At this time, the fan blades 27 make full contact with the valve plate 33, which can effectively absorb the exhaust gas. The large amount of heat accumulated at the exhaust pipe port 3 is then quickly conducted to the air inside the second cover 8 through the heat sink 28 with U-shaped heat dissipation grooves 29 on the fan blade 27. This achieves rapid heat dissipation from the exhaust pipe valve, which can prevent the heat from the high-temperature exhaust gas from spreading to the chassis, sheet metal, wiring harness and other peripheral components, preventing accelerated aging or failure of parts. It can also reduce the high-temperature stress of the valve plate 33 and the connecting structure, and extend its service life. At the same time, it solves the drawback that the traditional fixed heat insulation cover cannot adapt to the higher heat insulation requirements when the valve plate 33 is closed. It achieves dynamic matching of heat insulation and heat dissipation capabilities under different valve operating conditions, ensuring the operational safety and stability of the exhaust system and related vehicle components. Meanwhile, the technical solution of using heat insulation tiles 37 with a thickness that gradually decreases in the direction away from the air intake end of the exhaust pipe body 1 within the heat insulation groove 38 on the inner circumference of the first cover 2 can achieve differentiated heat insulation protection for different areas of the exhaust pipe body 1. This allows the air intake end to effectively block the heat of the high-temperature exhaust gas with the thicker heat insulation tiles 37, preventing heat from being transferred to the chassis, body sheet metal and other surrounding components, thus avoiding accelerated aging or performance failure. At the same time, it allows the parts away from the air intake end to meet the basic heat insulation requirements while achieving device weight reduction through the thinner heat insulation tiles 37, reducing the overall weight to balance the installation stability of the vehicle exhaust system and the fuel economy of the whole vehicle. It can also reduce the thermal stress caused by excessive local temperature difference in the first cover 2 and the heat insulation tiles 37, extending their service life. This effectively solves the problem that traditional heat insulation structures cannot adapt to the heat distribution differences in different areas of the exhaust pipe.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat shield for a valve of an exhaust pipe of an automobile, comprising a first shield body (2) fixed to the outer circumferential wall of an exhaust pipe body (1), characterized in that, One end of the first cover (2) is fixedly connected to the second cover (8), and the outer circumferential wall of the second cover (8) is provided with a drive assembly that drives the valve plate (33) inside the exhaust pipe body (1) to open and close. The second cover (8) is provided with a heat dissipation component and a displacement component for adjusting the position of the heat dissipation component; The heat dissipation assembly includes a fan blade (27) disposed inside the second cover (8). One side of the outer wall of the fan blade (27) is in contact with one side of the outer wall of the valve plate (33). The cross-section of the fan blade (27) is fan-shaped. The outer wall of the fan blade (27) away from the valve plate (33) is fixedly connected with heat dissipation fins (28) distributed at equal intervals. One side of the outer wall of the heat dissipation fins (28) is provided with heat dissipation grooves (29) distributed at equal intervals. The cross-section of the heat dissipation grooves (29) is U-shaped. The interior of the second cover (8) is provided with a rotating assembly for adjusting the tilt angle of the fan blade (27). The rotating assembly includes a vertical plate (43) fixedly connected to one end of the fan blade (27). A third rotating column (42) is fixedly connected to one side of the outer wall of the vertical plate (43). A second gear disk (41) is fixedly connected to the outer circumference of the third rotating column (42). A circular frame (45) is provided on one side of the valve plate (33). The third rotating column (42) is rotatably connected to the circular frame (45). A circular groove (46) is provided on the outer circumference of the circular frame (45). A toothed ring plate (15) is rotatably connected inside the circular groove (46). A toothed groove (44) that meshes with the second gear disk (41) is provided on one side of the toothed ring plate (15).

2. A heat insulation cover for an automotive exhaust pipe valve according to claim 1, characterized in that, The inner circumferential wall of the first cover (2) is provided with a heat insulation groove (38), and a heat insulation tile (37) is provided inside the heat insulation groove (38). The thickness of the heat insulation tile (37) gradually decreases along the end away from the air inlet end of the exhaust pipe (1).

3. A heat insulation cover for an automotive exhaust pipe valve according to claim 2, characterized in that, The drive assembly includes a rotating shaft (7) rotatably connected to the outer circumferential wall of the second cover (8). One end of the rotating shaft (7) located inside the second cover (8) is fixedly connected to the valve plate (33). A crank (5) is fixedly connected to the end of the rotating shaft (7) away from the valve plate (33). A connecting rod (6) is rotatably connected to the top outer wall of the crank (5). A rack (4) is rotatably connected to the other end of the connecting rod (6).

4. A heat insulation cover for an automotive exhaust pipe valve according to claim 3, characterized in that, The outer circumferential wall of the second cover (8) is fixedly connected to a protective shell (3), and one end of the toothed rod (4) passes through the inner walls of both sides of the protective shell (3).

5. A heat insulation cover for an automotive exhaust pipe valve according to claim 4, characterized in that, The fan blade (27) is fixedly connected to a connecting seat (30) at one end away from the vertical plate (43). A ball head shaft (39) is fixedly connected to one side of the outer wall of the connecting seat (30). A rotating seat (31) is provided inside the second cover (8). A ball head groove (40) is provided on the outer circumference of the rotating seat (31). The ball head shaft (39) is rotatably connected to the ball head groove (40). A first rotating column (14) is fixedly connected to one end of the rotating seat (31). A horizontal plate (13) is rotatably connected to the end of the first rotating column (14) away from the rotating seat (31).

6. A heat insulation cover for an automotive exhaust pipe valve according to claim 5, characterized in that, The rack (4) has a first gear disk (34) meshing on one side of its outer wall. A second rotating column (18) is fixedly connected to the inner circumference of the first gear disk (34). A first helical gear (35) is fixedly connected to the outer circumference of the second rotating column (18). A second helical gear (36) meshes with the outer circumference of the first helical gear (35). A second threaded screw (24) is fixedly connected to one side of the outer wall of the second helical gear (36). A second threaded sleeve (25) is threadedly connected to the outer circumference of the second threaded screw (24) inside the second cover (8). A second connecting plate is fixedly connected to the inner circumference of the second cover (8). 23), the second threaded screw (24) is rotatably connected to the second connecting plate (23), a second guide post (22) is fixedly connected to one side of the outer wall of the second connecting plate (23), a second guide block (21) is slidably connected to the outer circumference of the second guide post (22), a reinforcing post is fixedly connected to one side of the outer wall of the first cover (2), the other end of the reinforcing post is fixedly connected to the second threaded sleeve (25), a connecting frame (26) is fixedly connected to the bottom outer wall of the second guide block (21), a toothed plate (12) is fixedly connected to one side of the connecting frame (26), and the toothed plate (12) cooperates with the toothed ring plate (15).

7. A heat insulation cover for an automotive exhaust pipe valve according to claim 6, characterized in that, A third connecting plate (32) is fixedly connected to one inner wall of the protective shell (3), and the third connecting plate (32) is rotatably connected to the second rotating column (18).

8. A heat insulation cover for an automotive exhaust pipe valve according to claim 7, characterized in that, The displacement assembly includes a worm (20) fixedly connected to the outer circumference of the second rotating column (18), a worm wheel (19) meshing with the outer circumference of the worm (20), a first threaded screw (16) fixedly connected to the inner circumference of the worm wheel (19), a first threaded sleeve (17) threadedly connected to the outer circumference of the first threaded screw (16), the first threaded sleeve (17) fixedly connected to the cross plate (13), and a first connecting plate (9) fixedly connected to one end of the second cover (8), the first connecting plate (9) being rotatably connected to the first threaded screw (16).

9. A heat insulation cover for an automotive exhaust pipe valve according to claim 8, characterized in that, Another first connecting plate (9) has a first guide post (10) fixedly connected to one side of its outer wall. The first guide post (10) has a first guide block (11) slidably connected to its circumferential outer wall. The first guide block (11) is fixedly connected to the horizontal plate (13).

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