Low-resistance high-efficiency automobile muffler assembly

Abstract

This utility model relates to the field of muffler technology, specifically to a low-resistance, high-efficiency automotive muffler assembly, including a housing, an exhaust pipe, a perforated pipe, two sound-absorbing cottons, a resistance-reducing mechanism, and a protective mechanism. The exhaust pipe is fixedly installed on the housing, and the perforated pipe is fixedly installed inside the housing and communicates with the exhaust pipe. Both sound-absorbing cottons are fixedly installed on the perforated pipe by the fixing mechanism. The resistance-reducing mechanism is used to reduce the airflow resistance inside the perforated pipe, and the protective mechanism is used to protect the exhaust pipe. The fixing mechanism includes two connecting plates, a cross pin, and a cylindrical rod. The two connecting plates are respectively fixedly installed on the two sound-absorbing cottons. A groove is formed on one connecting plate, and the cylindrical rod is slidably installed in the groove by a slider. This low-resistance, high-efficiency automotive muffler assembly, through the fixed mechanism, can fix the sound-absorbing cotton on the perforated pipe and avoid local compression of the sound-absorbing cotton, thereby improving the noise reduction effect of the muffler assembly.

Description

Technical Field

[0001] This utility model relates to the field of muffler technology, specifically to a low-resistance, high-efficiency automotive muffler assembly. Background Technology

[0002] An automobile is a non-rail-borne vehicle driven or towed by a power unit and propelled by wheels. It is mainly used for transporting people and goods, towing vehicles that transport people and goods, and special vehicles that meet specific purposes. It greatly improves the efficiency of transportation. Automobiles generate power through engines. When the exhaust gas in the engine cylinders is discharged, it will form strong airflow pulsations in the exhaust pipe. These pulsations rub and impact against the exhaust pipe wall, generating vibrations and radiating noise.

[0003] The low-resistance, high-efficiency automotive muffler assembly is an integrated device installed in the automotive exhaust system. It consists of a muffler housing, internal sound-absorbing structures such as baffles, porous pipes, resonant cavities, expansion chambers, and connecting pipes. Its core function is to buffer, attenuate, and silence the airflow pulsation, turbulence, and vibration formed by the high-temperature, high-pressure exhaust gas discharged from the engine through its internal structure, thereby reducing automotive exhaust noise.

[0004] Considering that existing automotive muffler assemblies typically use bolt clamps during use, and that the clamps are fixed by radial clamping force, they will cause local compression of the sound-absorbing cotton at the contact point, resulting in a sudden increase in cotton density and a decrease in loft in that area. Sound waves will have difficulty penetrating the compacted area, reducing the effective working area of ​​the sound-absorbing material and thus reducing the muffler's sound-absorbing effect. Utility Model Content

[0005] The purpose of this invention is to provide a low-resistance, high-efficiency automotive muffler assembly.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A low-resistance, high-efficiency automotive muffler assembly is provided, including a housing, an exhaust pipe, a perforated pipe, two sound-absorbing cottons, a resistance-reducing mechanism, and a protective mechanism. The exhaust pipe is fixedly installed on the housing, and the perforated pipe is fixedly installed inside the housing and is connected to the exhaust pipe. Both sound-absorbing cottons are fixedly installed on the perforated pipe through the fixing mechanism. The resistance-reducing mechanism is used to reduce the airflow resistance inside the perforated pipe, and the protective mechanism is used to protect the exhaust pipe.

[0008] The fixing mechanism includes two connecting plates, a cross post, and a cylindrical rod. The two connecting plates are fixedly installed on two sound-absorbing cotton pieces respectively. One connecting plate has a groove, and the cylindrical rod is slidably installed in the groove via a slider. The cross post is fixedly installed on the other connecting plate, and the cross post and the cylindrical rod are hinged together by a hinge plate. The movement of the slider can drive the hinge plate to move, thereby causing the two connecting plates to contact and fix together. This ensures that the two sound-absorbing cotton pieces are fixedly installed on the perforated pipe, avoiding local compression of the sound-absorbing cotton.

[0009] Furthermore, the fixing mechanism also includes a support plate and a two-way threaded rod. The support plate is fixedly mounted on a connecting plate, and the two-way threaded rod is rotatably mounted on the support plate and threadedly connected to the slider. A clearance groove is provided on the connecting plate, and a cross hole is provided on the hinge plate. The cross hole corresponds to the size of the cross post. When the cross hole coincides with the cross post, the two sound-absorbing cottons can be separated and disassembled.

[0010] Furthermore, the fixing mechanism also includes a guide rod, which is fixedly mounted on another connecting plate and passes through a connecting plate.

[0011] Furthermore, the drag-reducing mechanism includes a flow-dividing grid, which is fixedly installed on the inner wall of the perforated pipe, and the grid holes of the flow-dividing grid are honeycomb-shaped. The flow-dividing grid can divide a large airflow into multiple small airflows, each of which flows in a straight line within the grid unit, avoiding the generation of large-scale eddies and achieving a drag-reducing effect.

[0012] Furthermore, the drag-reducing mechanism also includes a guide cone, which is fixedly installed on the flow divider grid and is streamlined. The guide cone enables high-speed airflow to avoid directly impacting the cavity wall and forming vortices when entering the perforated pipe, instead allowing it to diffuse smoothly along the cone surface, thus reducing the local drag coefficient.

[0013] Furthermore, the drag-reducing mechanism also includes a flow-guiding rib, which is fixedly installed on the inner wall of the perforated pipe and is helical in shape. The flow-guiding rib can guide the airflow to flow smoothly along the helix, using centrifugal force to convert some of the turbulence into directional flow kinetic energy, thereby reducing turbulence losses.

[0014] Furthermore, the protective mechanism includes two arc-shaped plates and connecting rods. The two arc-shaped plates are slidably mounted on the exhaust pipe via two fixed rods, and are connected by a buffer spring. The connecting rods pass through both arc-shaped plates. These two arc-shaped plates provide protection and buffering for the exhaust pipe, reducing the risk of damage caused by vibration and impact.

[0015] Furthermore, the protective mechanism also includes two cushioning pads, which are fixedly installed on the two curved plates respectively.

[0016] The beneficial effects of this utility model are as follows: This low-resistance, high-efficiency automotive muffler assembly, through its fixed mechanism, can fix the sound-absorbing cotton onto the perforated pipe and avoid local compression of the sound-absorbing cotton, thereby improving the sound-absorbing effect of the muffler assembly. In addition, through the set drag-reducing mechanism, it can reduce the airflow resistance in the perforated pipe, thereby further improving the performance of the muffler assembly. At the same time, through the set protective mechanism, it can protect the exhaust pipe, thereby further improving the service life and performance of the muffler assembly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the shell structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the perforated tube of this utility model;

[0021] Figure 4 This is a schematic cross-sectional view of the perforated tube of this utility model;

[0022] Figure 5 For the present utility model Figure 3 Enlarged structural diagram of section A;

[0023] Figure 6 This is a schematic diagram of the main structure of the hinge plate of this utility model;

[0024] Figure 7 This is a schematic diagram of the disassembled structure of the protective mechanism of this utility model.

[0025] In the diagram: 1. Shell; 2. Exhaust pipe; 3. Perforated pipe; 4. Noise-absorbing cotton; 5. Drag-reducing mechanism; 51. Guide cone; 52. Diverter grille; 53. Guide rib; 6. Fixing mechanism; 61. Connecting plate; 62. Cross pin; 63. Hinge plate; 64. Cylindrical rod; 65. Slide groove; 66. Sliding block; 67. Bidirectional threaded rod; 68. Support plate; 69. Cross hole; 610. Clearance groove; 611. Guide rod; 7. Protective mechanism; 71. Arc plate; 72. Buffer pad; 73. Fixing rod; 74. Insertion rod; 75. Buffer spring. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] Reference Figures 1 to 4 The diagram illustrates a low-resistance, high-efficiency automotive muffler assembly, comprising a housing 1, an exhaust pipe 2, a perforated pipe 3, two sound-absorbing cottons 4, a resistance-reducing mechanism 5, and a protective mechanism 7. The exhaust pipe 2 is fixedly installed on the housing 1 and is used to discharge exhaust gas from the perforated pipe 3. The perforated pipe 3 is fixedly installed inside the housing 1 and is connected to the exhaust pipe 2. The perforated pipe 3 has multiple perforations, allowing sound waves to enter the sound-absorbing cottons 4 through the perforations, thus achieving sound absorption and resistance reduction. Both sound-absorbing cottons 4 are fixedly installed on the perforated pipe 3 via the fixing mechanism 6. The sound-absorbing cottons 4 are sound-absorbing materials used to absorb sound waves and reduce noise. The resistance-reducing mechanism 5 is used to reduce the airflow resistance inside the perforated pipe 3, mitigating the impact on the automotive engine. The protective mechanism 7 is used to protect the exhaust pipe 2, reducing the risk of damage caused by vibration and impact.

[0029] Reference Figure 3 , Figure 5 and Figure 6 Specifically, the fixing mechanism 6 includes two connecting plates 61, a cross post 62, and a cylindrical rod 64. The two connecting plates 61 are respectively fixedly installed on two sound-absorbing cotton 4. By connecting the two connecting plates 61 together, the two sound-absorbing cotton 4 are kept connected. One connecting plate 61 has a sliding groove 65, which guides the slider 66. The cylindrical rod 64 is slidably installed in the sliding groove 65 through the slider 66. The sliding effect of the slider 66 can drive the cylindrical rod 64 to move. The cross post 62 is fixedly installed on the other connecting plate 61, and the cross post 62 and the cylindrical rod 64 are hinged through a hinge plate 63. The movement of the cylindrical rod 64 can drive the hinge plate 63 to move, thereby driving the cross post 62 to move, and thus causing the two connecting plates 61 to move.

[0030] Reference Figure 5 and Figure 6More specifically, the fixing mechanism 6 also includes a support plate 68 and a bidirectional threaded rod 67. The support plate 68 is fixedly installed on a connecting plate 61, and the bidirectional threaded rod 67 is rotatably installed on the support plate 68. The bidirectional threaded rod 67 is threadedly connected to the slider 66. There are two sliders 66. Through the rotation effect of the bidirectional threaded rod 67, the two sliders 66 can be moved simultaneously, moving closer or further apart. A clearance groove 610 is provided on a connecting plate 61. By providing the clearance groove 610, it is convenient for the operator to rotate the bidirectional threaded rod 67. A cross hole 69 is provided on the hinge plate 63. When the hinge plate 63 moves, it can drive the cross hole 69 to rotate, so that the cross hole 69 can coincide with the cross post 62. At this time, the hinge plate 63 moves along the axial direction of the cylindrical rod 64, so that the hinge plate 63 can be separated from the cross post 62, which is convenient for separating and disassembling the two sound-absorbing cotton 4. The fixing mechanism 6 also includes a guide rod 611, which is fixedly installed on another connecting plate 61 and passes through one of the connecting plates 61. The guide rod 611 guides the two connecting plates 61 and prevents the two connecting plates 61 from shifting when they move.

[0031] Reference Figure 4 Specifically, the drag reduction mechanism 5 includes a flow-dividing grid 52, which is fixedly installed on the inner wall of the perforated pipe 3. The grid holes of the flow-dividing grid 52 are honeycomb-shaped. The flow-dividing grid 52 can divide a large airflow into multiple small airflows. Each small airflow flows in a straight line within the grid unit, avoiding the generation of large-scale vortices and achieving a drag reduction effect. The cross-sectional dimensions of the grid holes need to match the aperture of the perforated pipe 3 and the airflow velocity. The drag reduction mechanism 5 also includes a guide cone 51, which is fixedly installed on the flow-dividing grid 52 and is streamlined. The guide cone 51 enables the high-speed airflow to avoid directly impacting the cavity wall and forming vortices when entering the perforated pipe 3, instead allowing it to diffuse smoothly along the cone surface, reducing the local drag coefficient. The drag reduction mechanism 5 also includes a guide rib 53, which is fixedly installed on the inner wall of the perforated pipe 3 and is helical in shape. The guide rib 53 can guide the airflow to flow smoothly along the spiral, and use centrifugal force to convert part of the turbulence into directional flow kinetic energy, thereby reducing turbulence loss.

[0032] Reference Figure 1 and Figure 7The protective mechanism 7 includes two arc-shaped plates 71 and a connecting rod 74. The two arc-shaped plates 71 are slidably mounted on the exhaust pipe 2 via two fixing rods 73, and are connected by a buffer spring 75. The fixing rods 73 guide the two arc-shaped plates 71, and the spring force of the buffer spring 75 provides a buffering effect. The connecting rod 74 passes through both arc-shaped plates 71. The protective mechanism 7 also includes two buffer pads 72, which are fixedly mounted on the two arc-shaped plates 71. The buffer pads 72 provide a buffering effect when the arc-shaped plates 71 impact the exhaust pipe 2, reducing the impact load on the exhaust pipe 2.

[0033] Reference Figures 1 to 7 This low-resistance, high-efficiency automotive muffler assembly, through its fixed mechanism, can securely install the sound-absorbing cotton onto the perforated pipe without causing localized compression of the cotton, thereby improving the muffler assembly's noise reduction effect. Furthermore, the resistance-reducing mechanism reduces airflow resistance within the perforated pipe, further enhancing the muffler assembly's performance. Additionally, the protective mechanism protects the exhaust pipe, further extending the muffler assembly's lifespan and overall performance.

[0034] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A low-resistance, high-efficiency automotive muffler assembly, characterized in that, The device includes a housing (1), an exhaust pipe (2), a perforated pipe (3), two sound-absorbing cottons (4), a resistance-reducing mechanism (5), and a protective mechanism (7). The exhaust pipe (2) is fixedly installed on the housing (1), the perforated pipe (3) is fixedly installed inside the housing (1), and the perforated pipe (3) is connected to the exhaust pipe (2). The two sound-absorbing cottons (4) are fixedly installed on the perforated pipe (3) by a fixing mechanism (6). The resistance-reducing mechanism (5) is used to reduce the airflow resistance inside the perforated pipe (3), and the protective mechanism (7) is used to protect the exhaust pipe (2). The fixing mechanism (6) includes two connecting plates (61), a cross post (62) and a cylindrical rod (64). The two connecting plates (61) are fixedly installed on two sound-absorbing cotton (4) respectively. A groove (65) is opened on one of the connecting plates (61). The cylindrical rod (64) is slidably installed in the groove (65) through a slider (66). The cross post (62) is fixedly installed on the other connecting plate (61), and the cross post (62) and the cylindrical rod (64) are hinged through a hinge plate (63).

2. The low-resistance, high-efficiency automotive muffler assembly according to claim 1, characterized in that, The fixing mechanism (6) further includes a support plate (68) and a bidirectional threaded rod (67). The support plate (68) is fixedly installed on a connecting plate (61), and the bidirectional threaded rod (67) is rotatably installed on the support plate (68). The bidirectional threaded rod (67) is threadedly connected to the slider (66). A clearance groove (610) is provided on the connecting plate (61), and a cross hole (69) is provided on the hinge plate (63).

3. The low-resistance, high-efficiency automotive muffler assembly according to claim 2, characterized in that, The fixing mechanism (6) also includes a guide rod (611), which is fixedly installed on another connecting plate (61) and passes through a connecting plate (61).

4. The low-resistance, high-efficiency automotive muffler assembly according to claim 1, characterized in that, The drag reduction mechanism (5) includes a diversion grid (52), which is fixedly installed on the inner wall of the perforated pipe (3), and the grid holes of the diversion grid (52) are honeycomb-shaped.

5. The low-resistance, high-efficiency automotive muffler assembly according to claim 4, characterized in that, The drag reduction mechanism (5) also includes a flow guide cone (51), which is fixedly installed on the flow divider (52) and is streamlined.

6. The low-resistance, high-efficiency automotive muffler assembly according to claim 5, characterized in that, The drag reduction mechanism (5) also includes a flow guide rib (53), which is fixedly installed on the inner wall of the perforated pipe (3) and is spiral-shaped.

7. The low-resistance, high-efficiency automotive muffler assembly according to claim 1, characterized in that, The protective mechanism (7) includes two arc-shaped plates (71) and a plug rod (74). The two arc-shaped plates (71) are slidably mounted on the exhaust pipe (2) by two fixed rods (73), and the two arc-shaped plates (71) are connected by a buffer spring (75). The plug rod (74) passes through the two arc-shaped plates (71) respectively.

8. A low-resistance, high-efficiency automotive muffler assembly according to claim 7, characterized in that, The protective mechanism (7) also includes two buffer pads (72), which are respectively fixedly installed on two arc-shaped plates (71).

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