An electric light truck muffler assembly

Abstract

The utility model discloses a kind of electric light truck silencer assemblies, it is related to vehicle muffler technical field, it includes the connecting pipeline being connected with car, the outside of connecting pipeline is provided with muffling cavity, and one end of muffling cavity is fixedly communicated with tail pipe, the gas outlet end of connecting pipeline is fixedly communicated with muffling pipeline one, and hole one is provided on muffling pipeline one, one end of muffling pipeline one is fixedly provided with baffle, and baffle is provided with muffling pipeline two, hole two is provided on muffling pipeline two, and the diameter of hole two is greater than the diameter of hole one, the inside of muffling cavity is fixedly provided with connecting piece, and double-layer composite inner shell is fixedly arranged on connecting piece, the inside of inner shell is provided with several partition plates, and through hole is arranged on partition plate. The electric light truck silencer assembly is through double-layer composite inner shell, matrix hole pipe and elastic connecting structure, realize the efficient absorption of electric light truck medium-high frequency noise, vibration suppression and low flow resistance and light weight.

Description

Technical Field

[0001] This utility model relates to the field of vehicle muffler technology, specifically to an electric light truck muffler assembly. Background Technology

[0002] With the adjustment of the global energy structure and the increasing awareness of environmental protection, electric vehicles have become an important direction for the transformation and upgrading of the automotive industry. Among them, electric light trucks, as the main vehicle type for urban logistics distribution and short-distance transportation, have been widely used and developed rapidly due to their advantages such as zero emissions, low noise, and low operating costs.

[0003] However, although electric vehicles eliminate the traditional internal combustion engine, their auxiliary systems, such as air compressors, cooling fans, motors, and electronic control systems, still generate a certain level of noise. Especially in the commercial vehicle sector, due to the specific load requirements and working environment, electric light trucks still generate significant aerodynamic and structural noise during operation. If left uncontrolled, this can not only affect driving comfort but also potentially pollute the urban sound environment.

[0004] Traditional mufflers mostly employ reactive, resistive, or composite structures. Their design is primarily aimed at the pulsating noise spectrum characteristics of internal combustion engine exhaust. They achieve sound wave reflection, interference, and absorption through components such as pipes, chambers, and perforated plates. However, electric light trucks have a wider noise spectrum, with prominent mid-to-high frequency components, and lack the periodic pulsation of the exhaust process. Therefore, the effectiveness of traditional reactive mufflers, which mainly focus on low-frequency noise reduction, is limited. At the same time, existing mufflers often struggle to meet multiple requirements such as high noise reduction, low flow resistance, and lightweight design.

[0005] Therefore, in order to address the above problems, the applicant needs to design an electric light truck muffler assembly to solve the problem. Utility Model Content

[0006] The purpose of this invention is to provide an electric light truck muffler assembly to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an electric light truck muffler assembly, including a connecting pipe connected to a vehicle, a muffler cavity fixedly disposed on the outer side of the connecting pipe, and a tailpipe fixedly connected to the end of the muffler cavity away from the connecting pipe, a first muffler pipe fixedly connected to the outlet end of the connecting pipe, and a hole first provided on the first muffler pipe, a baffle plate fixedly disposed at one end of the first muffler pipe, and a second muffler pipe fixedly disposed on the baffle plate, a second hole second provided on the second muffler pipe, and the diameter of the second hole second being larger than the diameter of the first hole, a connector fixedly disposed on the inner side of the muffler cavity, and a double-layer composite inner shell fixedly disposed on the connector, and a plurality of partition plates provided on the inner side of the inner shell, and each partition plate being provided with a through hole.

[0008] Furthermore, the first hole is arranged in a matrix on the wall of the first silencing pipe, and the second hole is arranged in a matrix on the wall of the second silencing pipe.

[0009] Through the above structural design, the airflow distribution is optimized by the matrix arrangement of holes, thereby improving the dissipation efficiency of mid-to-high frequency noise.

[0010] Furthermore, the double-layer composite inner shell includes an inner shell and an outer shell, wherein the inner shell is made of a porous metal material and the outer shell is a glass fiber layer.

[0011] Through the above structural design, the double-layer composite structure achieves a balance between broadband sound absorption and structural strength, thereby enhancing the overall sound absorption performance.

[0012] Furthermore, the porous metal material is porous aluminum foam.

[0013] Through the above structural design, porous aluminum foam material is used to achieve lightweight design while ensuring sound absorption effect.

[0014] Furthermore, the inner wall of the anechoic chamber is lined with sound-absorbing cotton.

[0015] Through the above structural design, high-frequency noise is further absorbed by the sound-absorbing cotton, reducing sound wave reflection and cavity resonance.

[0016] Furthermore, the connector is an elastic metal sheet in the shape of a Z, with its two ends fixedly connected to the inner wall of the silencing cavity and the outer wall of the double-layer composite inner shell, respectively.

[0017] Through the above structural design, the elastic Z-shaped connector reduces vibration transmission and suppresses the generation of structural noise.

[0018] Furthermore, the outlet end of the tailpipe is bent downwards.

[0019] Through the above structural design, the downward bending design of the tailpipe prevents rainwater intrusion and guides noise away from ground reflection.

[0020] Furthermore, the first and second silencing pipes are coaxially arranged.

[0021] Through the above structural design, the coaxial pipe layout reduces airflow turbulence and the generation of additional airflow noise.

[0022] Compared with the prior art, the beneficial effects of this utility model are: This electric light truck muffler assembly features a matrix-style perforation and coaxial layout on muffler duct one and muffler duct two, which optimizes airflow and broadens the silencing frequency band. The double-layer composite inner shell, combined with a porous foam aluminum inner layer and a glass fiber outer layer, along with sound-absorbing cotton on the inner wall of the silencing cavity, provides efficient broadband sound absorption and sound insulation for the prominent mid-to-high frequency noise of electric light trucks. At the same time, the Z-shaped elastic connector effectively suppresses vibration transmission, and the downward bending design of the tailpipe has both rainproof and guiding noise reduction functions, which together improve the environmental adaptability and durability of the silencing components, thus achieving the requirements of high noise reduction, low flow resistance, and lightweight design for electric light truck mufflers. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional sectional structure of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the layered structure of the inner shell of this utility model.

[0024] In the diagram: 1. Connecting pipe; 2. Silencer cavity; 3. Tail pipe; 4. Silencer pipe one; 5. Hole one; 6. Barrier plate; 7. Silencer pipe two; 8. Hole two; 9. Partition plate; 10. Through hole; 11. Inner shell; 12. Connector; 111. Inner shell; 112. Outer shell. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-4As shown, this utility model discloses an electric light truck muffler assembly, including a connecting pipe 1 connected to the vehicle, a muffler cavity 2 fixedly disposed on the outer side of the connecting pipe 1, and a tailpipe 3 fixedly connected to the end of the muffler cavity 2 away from the connecting pipe 1, a muffler duct 1 4 fixedly connected to the air outlet end of the connecting pipe 1, and a hole 5 disposed on the muffler duct 1 4, a baffle plate 6 fixedly disposed at one end of the muffler duct 1 4, and a muffler duct 2 7 fixedly disposed on the baffle plate 6, and a hole 2 8 disposed on the muffler duct 2 7, the diameter of which is larger than the diameter of the hole 1 5, a connector 12 fixedly disposed on the inner side of the muffler cavity 2, and a double-layer composite inner shell 11 fixedly disposed on the connector 12, and a plurality of partition plates 9 disposed on the inner side of the inner shell 11, and each partition plate 9 is provided with a through hole 10.

[0027] Holes 1-5 are arranged in a matrix on the wall of silencer duct 1-4, and holes 2-8 are arranged in a matrix on the wall of silencer duct 2-7. This allows the airflow to pass through the pipe wall more evenly, increases the contact area and interaction opportunities between sound waves and the silencer structure, thereby improving the dissipation efficiency of mid-to-high frequency noise and the width of the silencer frequency band.

[0028] The double-layer composite inner shell 11 includes an inner shell 111 and an outer shell 112. The inner shell 111 is made of porous metal material, and the outer shell 112 is a glass fiber layer. It makes comprehensive use of the broadband sound absorption performance of porous materials and the sound insulation and damping characteristics of fiber materials. While effectively suppressing mid-to-high frequency noise, it ensures the mechanical strength and durability of the inner shell 11.

[0029] The porous metal material is porous aluminum foam, which combines excellent acoustic performance, lightweight characteristics and high specific strength, achieving a balance between efficient sound absorption and structural lightweight in the muffler assembly, meeting the energy-saving and weight-reduction requirements of electric vehicles.

[0030] The inner wall of the anechoic chamber 2 is lined with sound-absorbing cotton, which can effectively absorb the mid-to-high frequency sound waves that pass through the inner shell 11, reduce the multiple reflections of sound waves in the chamber and the reverberant sound field formed, and further reduce the overall noise level.

[0031] The connector 12 is an elastic metal sheet in the shape of a Z. Its two ends are fixedly connected to the inner wall of the silencing cavity 2 and the outer wall of the double-layer composite inner shell 11, respectively. When the connector 12 is subjected to vibration, it undergoes elastic deformation, thereby effectively isolating and attenuating the vibration energy transmitted from the double-layer composite inner shell 11 to the outer shell of the silencing cavity 2, and suppressing the generation and propagation of structural noise.

[0032] The outlet end of tailpipe 3 is bent downwards, which can effectively prevent external rainwater or foreign objects from entering the muffler through tailpipe 3. At the same time, it directs the outlet noise to the ground, using the sound absorption characteristics of the ground to reduce the long-distance propagation of noise and reduce the impact on the surrounding environment.

[0033] The silencer duct 1 (4) and silencer duct 2 (7) are set coaxially. The coaxial layout makes the airflow direction smoother, which minimizes the noise generated by eddies and airflow caused by sudden changes or bends in the duct. This helps to reduce flow resistance and improve the overall aerodynamic performance of the silencer.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric light truck muffler assembly, characterized in that, The system includes a connecting pipe (1) connected to a car, a silencing cavity (2) fixedly provided on the outside of the connecting pipe (1), and a tailpipe (3) fixedly connected to the end of the silencing cavity (2) away from the connecting pipe (1). A silencing pipe (4) is fixedly connected to the outlet end of the connecting pipe (1), and a hole (5) is provided on the silencing pipe (4). A baffle plate (6) is fixedly provided at one end of the silencing pipe (4), and a silencing pipe (7) is fixedly provided on the baffle plate (6). A hole (8) is provided on the silencing pipe (7), and the diameter of the hole (8) is larger than the diameter of the hole (5). A connector (12) is fixedly provided on the inside of the silencing cavity (2), and a double-layer composite inner shell (11) is fixedly provided on the connector (12). Several partition plates (9) are provided on the inside of the inner shell (11), and each partition plate (9) is provided with a through hole (10).

2. The electric light truck muffler assembly according to claim 1, characterized in that: The first hole (5) is arranged in a matrix on the wall of the first silencing pipe (4), and the second hole (8) is arranged in a matrix on the wall of the second silencing pipe (7).

3. The electric light truck muffler assembly according to claim 1, characterized in that: The double-layer composite inner shell (11) includes an inner shell (111) and an outer shell (112). The inner shell (111) is made of porous metal material, and the outer shell (112) is a glass fiber layer.

4. The electric light truck muffler assembly according to claim 3, characterized in that: The porous metal material is porous aluminum foam.

5. The electric light truck muffler assembly according to claim 1, characterized in that: The inner wall of the silencing cavity (2) is lined with sound-absorbing cotton.

6. The electric light truck muffler assembly according to claim 1, characterized in that: The connector (12) is an elastic metal sheet in the shape of a Z, and its two ends are fixedly connected to the inner wall of the sound-absorbing cavity (2) and the outer wall of the double-layer composite inner shell (11), respectively.

7. The electric light truck muffler assembly according to claim 1, characterized in that: The outlet end of the tailpipe (3) is bent downwards.

8. The electric light truck muffler assembly according to claim 1, characterized in that: The first silencing duct (4) and the second silencing duct (7) are arranged coaxially.

Images