Automobile exhaust pipe assembly

Abstract

The invention relates to the technical field of automobile exhaust pipe assemblies, and discloses an automobile exhaust pipe assembly which comprises a three-way catalytic converter, an exhaust manifold, a silencer pipe, a tail pipe and a pipe hoop, the exhaust manifold is assembled on the right side of the three-way catalytic converter, the silencer pipe is assembled on the right side of the exhaust manifold, the tail pipe is assembled at the other end of the silencer pipe, and the pipe hoop is assembled at the other end of the silencer pipe. The pipe hoop is assembled outside the three-way catalytic converter, the three-way catalytic converter is wrapped with the air bag set, the locking mechanisms are assembled on the two sides of the three-way catalytic converter and comprise sliding discs, the sliding discs are connected with the air bag set, bent arms are evenly distributed on the outer portions of the sliding discs, and the outer portions of the bent arms are connected with locking discs. According to the automobile exhaust pipe assembly, the situation that when the three-way catalytic converter is used at high frequency, vibration is generated due to the external environment, the three-way catalytic converter collides with an automobile to cause internal damage is avoided, and the situation that an external water source enters an engine through a one-way mechanism and the three-way catalytic converter, and consequently the automobile is damaged is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust pipe assemblies, in particular to an automobile exhaust pipe assembly. Background Art

[0002] The automobile exhaust pipe assembly is a key component of the automobile exhaust system. It is responsible for guiding the exhaust gas generated by the engine to the outside of the vehicle and ensuring that this process is as efficient, quiet and safe as possible. The automobile exhaust pipe assembly usually consists of an exhaust manifold, a three-way catalytic converter, a muffler and a tail pipe. The three-way catalytic converter is used to reduce harmful substances in the exhaust gas, such as hydrocarbons, nitrogen oxides and carbon monoxide;

[0003] When the car is used frequently, the temperature of the outside of the three-way catalytic converter will reach over 100 degrees Celsius, and because the internal engine of the car will shake when it is used frequently, the frequent shaking of the three-way catalytic converter will cause the vehicle to collide, resulting in internal damage. At the same time, long-term shaking will loosen the external nut of the clamp connected to the vehicle, resulting in the falling off of the three-way catalytic converter. At the same time, when the vehicle is wading, external water will enter the exhaust system and then be sucked into the engine by the airflow, causing damage to the car engine. When the car is wading, the driver cannot observe the road conditions normally, resulting in the exhaust system scratching the road surface, causing damage to the internal three-way catalytic converter, thereby reducing the overall service life of the exhaust system. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides an automobile exhaust pipe assembly to solve the above-mentioned technical problems that long-term shaking will cause the external nut of the clamp connected to the vehicle to loosen, which will lead to the falling off of the three-way catalytic converter; at the same time, when the vehicle is wading, external water will enter the interior of the exhaust system, and then be sucked into the engine by the airflow, thereby causing damage to the automobile engine; when the car is wading, the driver cannot observe the road surface condition normally, which will cause the exhaust system to scratch the road surface, and then cause damage to the internal three-way catalytic converter, thereby reducing the overall service life of the exhaust system.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automobile exhaust pipe assembly, comprising: a three-way catalytic converter, an exhaust manifold, a muffler pipe, a tail pipe and a pipe clamp, wherein the exhaust manifold is mounted on the right side of the three-way catalytic converter, the muffler pipe is mounted on the right side of the exhaust manifold, and the tail pipe is mounted on the other end of the muffler pipe, the pipe clamp is mounted on the outside of the three-way catalytic converter, the outside of the three-way catalytic converter is wrapped with an airbag group, both sides of the three-way catalytic converter are equipped with locking mechanisms, the locking mechanisms include a sliding plate, and the sliding plate is connected to the airbag group, the outside of the sliding plate is evenly provided with bent arms, and the outside of the bent arms is connected to a locking plate.

[0008] The right side of the outside of the three-way catalytic converter is equipped with a conduction mechanism, which includes a hollow cylinder, a piston rod is slidably connected to the inside of the hollow cylinder, and the piston rod is connected to a sliding plate, and the top of the hollow cylinder is connected to a long tube.

[0009] The right side of the tail pipe is equipped with a one-way mechanism, which includes a square tube, and the square tube is connected to the tail pipe, baffles are welded on both sides of the inside of the square tube, and an I-shaped plate is slidably connected to the inside of the square tube, a spring is connected between the I-shaped plate and the baffle, piston opening plates are slidably connected to both ends of the inside of the I-shaped plate, and the right side of the I-shaped plate is connected to the long tube.

[0010] Preferably, threaded rods are inserted on both sides of the pipe clamp, and slotted nuts are threadedly connected to both ends of the outside of the threaded rods. The outside of the slotted nuts is evenly provided with slots. The threaded rods can be fixed to the chassis of the vehicle by welding or other fixing methods, and the three-way catalytic converter and the pipe clamp are assembled in conjunction with the slotted nuts.

[0011] Preferably, teeth are evenly distributed on the outside of the lock disk, and the teeth are adapted to the slots. The lock disk can be inserted into the interior of the slotted nut through the teeth, thereby locking the position of the slotted nut to prevent the slotted nut from rotating.

[0012] Preferably, the piston rod and the piston part inside the piston opening plate are both embedded with sliding disks, and the sliding disks are slidingly connected to the I-plate and the hollow cylinder respectively, and the sliding disks can guide the piston rod and the piston opening plate to perform linear motion.

[0013] Preferably, the outside of the bending arm is connected with a guide block, and the outside of the pipe clamp is evenly provided with track grooves adapted to the guide block. The fixed groove is slidably connected to the guide block, and the track groove cooperates with the guide block to guide the bending arm, thereby improving the stability of the bending arm when transmitting the lock disk.

[0014] Preferably, a sealing ring is installed at the junction of the long tube and the square tube, and the right side of the long tube is installed in an S shape inside the square tube. The sealing ring improves the overall airtightness of the square tube. The S shape is installed inside the square tube, so that the long tube has a certain amount of movement margin, thereby facilitating the movement of the I-shaped plate.

[0015] Preferably, the interior of the airbag group is filled with active gas, and the bottom of the airbag group is equipped with a wear-resistant plate, and the top of the airbag group is equipped with a rubber plate. The active gas inside the airbag group can be air, oxygen, hydrogen, carbon dioxide and other gases, and the rubber plate can prevent the top of the three-way catalytic converter from colliding with the vehicle.

[0016] Preferably, the sliding plate is slidably mounted on the outside of the three-way catalytic converter, and ball bearings are evenly distributed on the inside of the sliding plate. The ball bearings can improve the smoothness of the sliding plate when it moves outside the three-way catalytic converter.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an automobile exhaust pipe assembly, which has the following beneficial effects:

[0019] 1. When the automobile is used at high frequency, the exhaust pipe assembly of the automobile drives the airbag group to expand through the principle of thermal expansion and contraction, and then protects the outside of the three-way catalytic converter to prevent the three-way catalytic converter from being damaged internally due to vibration caused by the external environment and collision with the vehicle when the automobile is used at high frequency;

[0020] 2. When the airbag group of the automobile exhaust pipe assembly is inflated, the slotted nut inside the pipe clamp is automatically locked by the additional locking mechanism to prevent the pipe clamp from shaking due to the automobile and the three-way catalytic converter, which may cause damage to the internal slotted nut and threaded rod, thereby causing the three-way catalytic converter to fall off and hit the ground and cause damage;

[0021] 3. When the automobile exhaust pipe assembly and the three-way catalytic converter are working, the one-way mechanism is added and the one-way valve principle is used to make the one-way mechanism as a whole only exhaust but not intake, thereby preventing external water from entering the interior of the engine through the one-way mechanism and the three-way catalytic converter and causing damage to the vehicle;

[0022] 4. When the automobile exhaust pipe assembly and the three-way catalytic converter are used at high frequency, the one-way mechanism automatically moves to drive the volume of the baffle inside the one-way mechanism to decrease, thereby expanding the gas passing area inside the square tube, thereby greatly increasing the exhaust speed of the device as a whole and improving the use effect of the device;

[0023] 5. When the automobile is wading, the exhaust pipe assembly of the automobile drives the airbag group to quickly return to its original position and wrap around the outside of the three-way catalytic converter through the principle of thermal expansion and contraction, so as to prevent the three-way catalytic converter from being damaged by the debris in the water. At the same time, the airbag group retracts, thereby greatly improving the strength of the airbag group and preventing the airbag group from being punctured and damaged by the debris in the water.

[0024] 6. When the airbag group of the automobile exhaust pipe assembly returns to its original position, it drives the locking mechanism and the transmission mechanism to return to their original position, so that the piston opening plate protrudes from the inside of the I-shaped plate, reducing the space inside the square tube, and cooperating with the one-way mechanism to exhaust air continuously, avoiding damage to the vehicle engine caused by water outside the one-way mechanism entering its interior. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an external schematic diagram of the present invention;

[0026] Figure 2 It is an enlarged schematic diagram of the three-way catalytic converter of the present invention;

[0027] Figure 3 It is an external schematic diagram of the locking mechanism of the present invention;

[0028] Figure 4 It is a partial cross-sectional view of the conducting mechanism of the present invention;

[0029] Figure 5 It is a partial cross-sectional view of the one-way mechanism of the present invention.

[0030] In the figure: 1. three-way catalytic converter; 11. airbag assembly; 2. exhaust manifold; 3. muffler pipe; 4. tail pipe; 5. one-way mechanism; 51. square tube; 52. baffle; 53. I-plate; 54. spring; 55. piston perforated plate; 6. locking mechanism; 61. sliding plate; 62. bent arm; 63. locking plate; 64. guide block; 7. transmission mechanism; 71. hollow cylinder; 72. piston rod; 73. long tube; 8. pipe clamp; 81. threaded rod; 82. slotted nut. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention provides a technical solution, please refer to Figure 1 and Figure 2, an automobile exhaust pipe assembly, comprising: a three-way catalytic converter 1, an exhaust manifold 2, a muffler pipe 3, a tail pipe 4 and a pipe clamp 8, the exhaust manifold 2 is assembled on the right side of the three-way catalytic converter 1, the muffler pipe 3 is assembled on the right side of the exhaust manifold 2, and the tail pipe 4 is assembled on the other end of the muffler pipe 3, and the pipe clamp 8 is assembled on the outside of the three-way catalytic converter 1.

[0033] The three-way catalytic converter 1, the exhaust manifold 2, the muffler pipe 3, the tail pipe 4 and the pipe clamp 8 are common components inside the automobile exhaust system in the prior art, wherein the three-way catalytic converter 1 can effectively convert harmful gases such as carbon monoxide CO, hydrocarbons HC and nitrogen oxides NOx in the exhaust gas into carbon dioxide, water and nitrogen that are more environmentally friendly through redox reactions, the exhaust manifold 2 is used for the flow of gas, the muffler pipe 3 is used for gas silencing and noise reduction, the tail pipe 4 is used for gas discharge, and the pipe clamp 8 is used for assembling the three-way catalytic converter 1.

[0034] See also Figure 3 and Figure 4 The outside of the three-way catalytic converter 1 is wrapped with an airbag group 11, and locking mechanisms 6 are installed on both sides of the three-way catalytic converter 1. The locking mechanism 6 includes a sliding plate 61, and the sliding plate 61 is connected to the airbag group 11. The outside of the sliding plate 61 is evenly provided with bent arms 62, and the outside of the bent arms 62 is connected to a locking plate 63.

[0035] The interior of the airbag group 11 is filled with active gas, and the bottom of the airbag group 11 is equipped with a wear-resistant plate, and the top of the airbag group 11 is equipped with a rubber plate. The active gas inside the airbag group 11 can be air, oxygen, hydrogen, carbon dioxide and other gases, and the rubber plate can prevent the top of the three-way catalytic converter 1 from colliding with the vehicle.

[0036] The airbag group 11 can expand and contract by thermal expansion and contraction. At the same time, the outside of the airbag group 11 is equipped with a rubber wear-resistant layer. The two sides of the airbag group 11 are contraction layers, and the two sides can be contracted and transmitted by thermal expansion and contraction. The sliding plate 61 can be driven by the airbag group 11, and the bent arm 62 is used to drive the locking plate 63 to transmit, and the locking plate 63 limits the pipe clamp 8.

[0037] The outside of the lock plate 63 is evenly provided with teeth, and the teeth are adapted to the slots. The lock plate 63 can be inserted into the inside of the slotted nut 82 through the teeth, and then the position of the slotted nut 82 is locked to prevent the slotted nut 82 from rotating.

[0038] The outside of the bent arm 62 is connected to a guide block 64, and the outside of the pipe clamp 8 is evenly provided with track grooves adapted to the guide block 64. The fixed groove is slidably connected to the guide block 64. The track groove cooperates with the guide block 64 to guide the bent arm 62, thereby improving the stability of the bent arm 62 when transmitting the lock plate 63.

[0039] The sliding plate 61 is slidably mounted on the outside of the three-way catalytic converter 1 , and balls are evenly distributed inside the sliding plate 61 . The balls can improve the smoothness of the sliding plate 61 when it moves outside the three-way catalytic converter 1 .

[0040] See also Figure 5 A conduction mechanism 7 is installed on the right side of the outside of the three-way catalytic converter 1. The conduction mechanism 7 includes a hollow cylinder 71. A piston rod 72 is slidably connected to the inside of the hollow cylinder 71, and the piston rod 72 is connected to the sliding plate 61. A long tube 73 is connected to the top of the hollow cylinder 71.

[0041] The hollow cylinder 71 is sleeved on the outside of the three-way catalytic converter 1, and the right side of the hollow cylinder 71 is in an open state. The hollow cylinder 71 cooperates with the piston rod 72 to generate pressure. The long tube 73 is used to transmit the one-way mechanism 5, and the long tube 73 is elastic and can be retracted.

[0042] The right side of the tail pipe 4 is equipped with a one-way mechanism 5, which includes a square tube 51, and the square tube 51 is connected to the tail pipe 4. Baffles 52 are welded on both sides of the inside of the square tube 51, and an I-shaped plate 53 is slidably connected to the inside of the square tube 51. A spring 54 is connected between the I-shaped plate 53 and the baffle 52. The two ends of the I-shaped plate 53 are slidably connected to the piston opening plate 55. The right side of the I-shaped plate 53 is connected to the long tube 73. The piston opening plate 55 includes a piston and an opening plate.

[0043] The square tube 51, the baffle 52, the I-shaped plate 53 and the spring 54 cooperate to form a simple one-way valve. The piston opening plate 55 can cover the volume of the I-shaped plate 53. At the same time, a plurality of holes are opened on the outside of the piston opening plate 55. The holes can allow air to pass through while preventing water and impurities from passing through quickly.

[0044] The piston rod 72 and the piston part inside the piston opening plate 55 are both embedded with sliding disks, and the sliding disks are slidingly connected to the I-plate 53 and the hollow cylinder 71 respectively. The sliding disks can guide the piston rod 72 and the piston opening plate 55 to perform linear motion.

[0045] A sealing ring is installed at the junction of the long tube 73 and the square tube 51, and the right side of the long tube 73 is installed in an S shape inside the square tube 51. The sealing ring improves the overall airtightness of the square tube 51. The S shape installed inside the square tube 51 allows the long tube 73 to have a certain amount of movement margin, thereby facilitating the movement of the I-shaped plate 53.

[0046] Threaded rods 81 are inserted on both sides of the pipe clamp 8, and both ends of the outside of the threaded rod 81 are threadedly connected with slotted nuts 82, and the outside of the slotted nuts 82 are evenly distributed with slots. The threaded rod 81 can be fixed to the chassis of the vehicle by welding or other fixing methods, and the three-way catalytic converter 1 and the pipe clamp 8 are assembled in conjunction with the slotted nuts 82.

[0047] In this solution, the left side of the three-way catalytic converter 1 is first connected to the vehicle through a bellows, the three-way catalytic converter 1 is fixed to the bottom of the vehicle through a pipe hoop 8, and the exhaust manifold 2 and the tail pipe 4 are fixed to the bottom of the vehicle through other fixing parts such as screws and clamps. When the vehicle is used at a high frequency, the temperature outside the three-way catalytic converter 1 cooperates with the principle of thermal expansion and contraction to drive the airbag group 11 to expand, and then the two sliding plates 61 are opposed to move away from each other, so that the locking plate 63 is driven to move through the transmission of the bent arm 62, and the outer part of the bent arm 62 is limited and fixed;

[0048] When the sliding plate 61 moves, it drives the piston rod 72 to move, and then cooperates with the hollow cylinder 71 and the long tube 73 to generate negative pressure, so that the piston opening plate 55 is sucked into the interior of the I-shaped plate 53 to shrink. At this time, the gas discharged from the three-way catalytic converter 1 enters the interior of the square tube 51 through the exhaust manifold 2, the muffler pipe 3 and the tail pipe 4. The gas pushes the I-shaped plate 53 to move, and then is discharged through the junction of the I-shaped plate 53 and the baffle 52. The design of the I-shaped plate 53 and the baffle 52 can prevent external water from entering the interior of the three-way catalytic converter 1 through the square tube 51 in the reverse direction, thereby causing damage to the engine;

[0049] When the vehicle is used for wading, since the three-way catalytic converter 1 is installed at the bottom of the vehicle, the three-way catalytic converter 1 first contacts the water source. At this time, the temperature outside the three-way catalytic converter 1 is quickly cooled by the water source, and then the airbag group 11 is quickly retracted and wrapped around the outside of the three-way catalytic converter 1, so that the three-way catalytic converter 1 is prevented from being damaged by collision with debris in the water. At the same time, since the airbag group 11 retracts, the strength of the airbag group 11 is greatly improved, so that the airbag group 11 is prevented from being punctured and damaged by debris in the water.

[0050] When the airbag group 11 returns to its original position, it drives the transmission mechanism 7 to return to its original position, so that the transmission mechanism 7 generates pressure, pushing the piston opening plate 55 to pop out from the inside of the I-shaped plate 53, reducing the space inside the square tube 51, cooperating with the one-way mechanism 5 to continuously exhaust air, and preventing the water source outside the one-way mechanism 5 from entering its interior;

[0051] When the car is used at a high frequency, the airbag group 11 is driven to expand by the principle of thermal expansion and contraction, and then the outside of the three-way catalytic converter 1 is protected, so as to prevent the three-way catalytic converter 1 from being damaged internally due to vibration caused by the external environment and collision with the vehicle when the car is used at a high frequency.

[0052] When the airbag assembly 11 is inflated, the slotted nut 82 inside the pipe clamp 8 is automatically locked by the additional locking mechanism 6, so as to prevent the pipe clamp 8 from shaking due to the vehicle and the three-way catalytic converter 1, which may cause damage to the slotted nut 82 and the threaded rod 81 inside, thereby causing the three-way catalytic converter 1 to fall off and collide with the ground and cause damage;

[0053] When the three-way catalytic converter 1 is working, the one-way mechanism 5 is added, and the one-way valve principle is used to make the one-way mechanism 5 as a whole only exhaust but not intake, thereby preventing external water from entering the interior of the engine through the one-way mechanism 5 and the three-way catalytic converter 1 and causing vehicle damage;

[0054] When the three-way catalytic converter 1 is used at a high frequency, the one-way mechanism 5 automatically moves to drive the baffle 52 inside the one-way mechanism 5 to reduce its volume, thereby expanding the gas passing area inside the square tube 51, thereby greatly increasing the exhaust speed of the device as a whole and improving the use effect of the device;

[0055] When the car is wading, the airbag assembly 11 is driven to quickly return to its original position and wrap around the outside of the three-way catalytic converter 1 through the principle of thermal expansion and contraction, so as to prevent the three-way catalytic converter 1 from being damaged by the debris in the water. At the same time, the airbag assembly 11 shrinks, thereby greatly improving the strength of the airbag assembly 11, so as to prevent the airbag assembly 11 from being punctured and damaged by the debris in the water.

[0056] When the airbag assembly 11 returns to its original position, it drives the locking mechanism 6 and the conducting mechanism 7 to return to their original position, so that the piston opening plate 55 protrudes from the inside of the I-shaped plate 53, reducing the space inside the square tube 51, and cooperating with the one-way mechanism 5 to continuously exhaust air, thereby preventing water from outside the one-way mechanism 5 from entering its interior and causing damage to the vehicle engine.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automobile exhaust pipe assembly, comprising: A three-way catalytic converter (1), an exhaust manifold (2), a muffler pipe (3), a tail pipe (4) and a pipe clamp (8), wherein the exhaust manifold (2) is mounted on the right side of the three-way catalytic converter (1), the muffler pipe (3) is mounted on the right side of the exhaust manifold (2), and the tail pipe (4) is mounted on the other end of the muffler pipe (3), and the pipe clamp (8) is mounted on the outside of the three-way catalytic converter (1), characterized in that: the outside of the three-way catalytic converter (1) is wrapped with an airbag group (11), both sides of the three-way catalytic converter (1) are equipped with locking mechanisms (6), the locking mechanisms (6) include a sliding plate (61), and the sliding plate (61) is connected to the airbag group (11), the outside of the sliding plate (61) is evenly provided with bent arms (62), and the outside of the bent arms (62) is connected to a locking plate (63); A conduction mechanism (7) is installed on the right side of the outside of the three-way catalytic converter (1), and the conduction mechanism (7) comprises a hollow cylinder (71), a piston rod (72) is slidably connected inside the hollow cylinder (71), and the piston rod (72) is connected to the sliding plate (61), and the top of the hollow cylinder (71) is connected to a long tube (73); The right side of the tail pipe (4) is equipped with a one-way mechanism (5), the one-way mechanism (5) comprising a square tube (51), and the square tube (51) is connected to the tail pipe (4), baffles (52) are welded on both sides of the inside of the square tube (51), and an I-shaped plate (53) is slidably connected to the inside of the square tube (51), a spring (54) is connected between the I-shaped plate (53) and the baffle (52), piston opening plates (55) are slidably connected to both ends of the inside of the I-shaped plate (53), and the right side of the I-shaped plate (53) is connected to the long tube (73).

2. The automobile exhaust pipe assembly according to claim 1, characterized in that: Threaded rods (81) are inserted on both sides of the pipe clamp (8), and both ends of the outside of the threaded rod (81) are threadedly connected with slotted nuts (82), and the outside of the slotted nuts (82) are evenly distributed with clamping grooves.

3. The automobile exhaust pipe assembly according to claim 2, characterized in that: The outside of the lock plate (63) is evenly provided with teeth, and the teeth are matched with the slots.

4. The automobile exhaust pipe assembly according to claim 1, characterized in that: The piston rod (72) and the piston part inside the piston opening plate (55) are both embedded with sliding disks, and the sliding disks are respectively slidably connected to the I-shaped plate (53) and the hollow cylinder (71).

5. The automobile exhaust pipe assembly according to claim 1, characterized in that: The outside of the bent arm (62) is connected to a guide block (64), the outside of the pipe clamp (8) is evenly provided with track grooves adapted to the guide block (64), and the fixed groove is slidably connected to the guide block (64).

6. The automobile exhaust pipe assembly according to claim 1, characterized in that: A sealing ring is installed at the junction of the long tube (73) and the square tube (51), and the right side of the long tube (73) is installed in an S shape inside the square tube (51).

7. The automobile exhaust pipe assembly according to claim 1, characterized in that: The interior of the airbag group (11) is filled with active gas, the bottom of the airbag group (11) is equipped with a wear-resistant plate, and the top of the airbag group (11) is equipped with a rubber plate.

8. The automobile exhaust pipe assembly according to claim 1, characterized in that: The sliding plate (61) is slidably mounted on the outside of the three-way catalytic converter (1), and balls are evenly distributed inside the sliding plate (61).

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