Engine noise reduction device

Abstract

This utility model relates to the field of noise reduction equipment technology and provides an engine noise reduction device, comprising: a noise reduction housing with an exhaust port at its rear end and an opening at the other end; a cover plate disposed at the opening of the noise reduction housing, the cover plate having an inner tube inside the noise reduction housing, a push plate inside the inner tube, an exhaust gas inlet on the cover plate, the exhaust gas inlet communicating with the interior of the inner tube, exhaust gas entering the interior of the inner tube and pushing the push plate to slide, and an elastic element between the push plate and the inner tube. Thus, this utility model, by setting a noise reduction structure that can adjust the exhaust state, ensures that the working state of the noise reduction structure is automatically adjusted when the engine's operating conditions change, thereby effectively removing engine noise and reducing exhaust back pressure, achieving real-time adjustment of the engine's exhaust back pressure.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction equipment technology, and in particular to an engine noise reduction device. Background Technology

[0002] In today's society, cars are not just a means of transportation; there are all sorts of demands, such as the sound of their exhaust pipes.

[0003] A silencer is a noise reduction device used in airflow ducts that simultaneously transmit noise. It utilizes pipes with sound-absorbing linings, bends, or pipes with sudden changes in cross-sectional area or other discontinuous acoustic impedance to attenuate or reflect noise back into the duct. The former is called a resistive silencer, the latter a reactive silencer, and there are also composite impedance silencers.

[0004] In existing technologies, the exhaust muffler inside the muffler is fixed, which means it cannot be effectively adjusted to reduce noise under different operating conditions, resulting in poor adaptability. In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this utility model is to provide an engine noise reduction device. This device can automatically adjust the working state of the noise reduction structure when the engine's operating conditions change by setting an adjustable exhaust state structure, thereby effectively removing engine noise and reducing exhaust back pressure, thus achieving real-time adjustment of the engine's exhaust back pressure.

[0006] To achieve the above objectives, this utility model provides an engine noise reduction device, comprising: The muffler housing has an air outlet at its rear end and an opening at the other end. A cover plate is provided at the opening of the muffler housing. The cover plate is located inside the muffler housing and has an inner tube. The inner tube has a push plate inside and an exhaust gas inlet is provided on the cover plate. The exhaust gas inlet communicates with the inside of the inner tube. Exhaust gas enters the inside of the inner tube and pushes the push plate to slide. An elastic element is provided between the push plate and the inner tube.

[0007] In one embodiment, the pusher plate has a guide bevel on the side near the exhaust gas inlet, the guide bevel is directed outward from the center of the pusher plate, and the pusher plate has a plurality of evenly arranged guide plates.

[0008] In one embodiment, the outer wall of the inner tube is provided with a plurality of evenly arranged vent holes, and the position of the push plate is slidable to adjust the portion of the inner tube that is connected to the exhaust gas inlet and outlet.

[0009] In one embodiment, the top of the inner tube is provided with a threaded portion, and the inner side of the cover plate is provided with a threaded protrusion corresponding to the threaded portion. The inner tube is installed on the cover plate through the threaded portion and the threaded protrusion.

[0010] In one embodiment, the interior of the silencing housing is provided with a plurality of uniformly arranged silencing rings, the silencing rings being sleeved on the inner tube and the inner wall of the silencing rings being in close contact with the outer wall of the inner tube.

[0011] In one embodiment, the silencing ring sleeve is provided with a plurality of air holes.

[0012] In one embodiment, the inner tube has an opening side with a mounting flange, and the cover plate and the mounting flange are fixed together by bolts.

[0013] In one embodiment, the elastic element is a thrust spring, one end of which is fixedly connected to the push plate, and the other end is fixedly connected to the inside of the inner tube.

[0014] This utility model provides an engine noise reduction device, comprising: The muffler housing has an air outlet at its rear end and an opening at the other end to ensure that gas can enter the interior of the muffler housing and then exit through the air outlet, thereby achieving normal exhaust flow. A cover plate is installed at the opening of the muffler housing to seal the opening, ensuring access to the interior of the muffler housing during use. This also ensures the removability of the noise reduction device, facilitating disassembly and maintenance in case of internal problems. Inside the muffler housing, within the cover plate, is an inner tube. This inner tube buffers exhaust energy, reducing exhaust noise. Furthermore, a push plate is located inside the inner tube. The push plate's position can be adjusted according to the exhaust back pressure, thus adaptively adjusting the area of ​​exhaust passing through the inner tube and adjusting the muffler according to the exhaust volume. The cover plate is provided with an exhaust gas inlet, which is connected to the interior of the inner tube. Exhaust gas enters the interior of the inner tube and pushes the push plate to slide. An elastic element is provided between the push plate and the inner tube. The elastic element adjusts the position of the push plate, providing the push plate with thrust and reset force, ensuring the position adjustment of the working part of the inner tube. In summary, the technical effect of this utility model is to set up a muffler structure that can adjust the exhaust state, ensuring that the working state of the muffler structure is automatically adjusted when the engine operating conditions change, thereby effectively removing engine noise and reducing exhaust back pressure, achieving real-time adjustment of the engine exhaust back pressure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the sound-absorbing shell of this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the inner tube of this utility model; Figure 5 This is a three-dimensional structural diagram of the push plate of this utility model; In the figure, 1-air outlet, 2-silencing shell, 21-silencing ring, 22-air hole, 3-cover plate, 31-threaded protrusion, 4-exhaust gas inlet, 5-inner tube, 51-threaded part, 52-vent hole, 6-elastic element, 7-push plate, 71-guide plate, 72-guide bevel. Detailed Implementation

[0016] 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 scope of protection of the present utility model.

[0017] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0018] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] See Figure 1 and Figure 2 This utility model provides an engine noise reduction device, which includes a noise reduction housing 2, an exhaust port 1 at its rear end, and an opening at the other end of the noise reduction housing 2 to ensure that gas can enter the interior of the noise reduction housing 2 and then be discharged from the noise reduction housing 2 through the exhaust port 1, thereby realizing the normal flow of exhaust gas. The cover plate 3, located at the opening of the muffler housing 2, seals the opening, allowing access to the interior of the muffler housing 2 during use. It also ensures the detachability of the noise reduction device, facilitating disassembly and maintenance in case of internal problems. Inside the muffler housing 2, the cover plate 3 houses an inner tube 5. This inner tube buffers exhaust energy, reducing noise. A push plate 7 is located inside the inner tube 5. The position of the push plate 7 can be adjusted according to the exhaust back pressure, thus adapting to the area through which exhaust passes. This allows for adjustment of the muffler's power based on the exhaust volume. The cover plate 3 has an exhaust gas inlet 4, which communicates with the interior of the inner tube 5. Exhaust gas entering the inner tube 5 pushes the push plate 7 to slide. An elastic element 6 is located between the push plate 7 and the inner tube 5. This elastic element 6 adjusts the position of the push plate 7, providing pushing and resetting force to ensure the positional adjustment of the working part of the inner tube 5.

[0020] In one embodiment, combined with Figure 2 and Figure 5 To ensure smoother gas flow during exhaust, the pusher plate 7 is provided with a guide bevel 72 on the side near the exhaust gas inlet 4. The guide bevel 72 guides the exhaust gas from the center to the outside through the guide bevel, thereby effectively ensuring the exhaust gas flow. Furthermore, several evenly arranged guide plates 71 can be provided on the pusher plate 7. The guide plates 71 can separate and guide the exhaust gas, further buffering the energy of the exhaust gas and reducing exhaust noise.

[0021] In one exemplary implementation, combined with Figure 2 and Figure 4To ensure the installation and noise reduction effect of the inner tube 5, several evenly arranged vent holes 52 are provided on the outer wall of the inner tube 5. The position of the push plate 7 is slidable to adjust the part of the inner tube 5 that connects with the exhaust gas inlet 4 and the exhaust outlet 1, so that the exhaust gas of different pressures can be effectively silenced. Thus, the exhaust gas under different working conditions can be silenced and discharged. The top of the inner tube 5 is provided with a threaded part 51, and the inner side of the cover plate 3 is provided with a threaded protrusion 31 corresponding to the threaded part 51. The inner tube 5 is installed on the cover plate 3 through the threaded part 51 and the threaded protrusion 31, so that the inner tube 5 can be quickly disassembled and repaired when maintenance is required, thus enabling quick maintenance of the inner tube 5.

[0022] For details, see Figure 1 , Figure 2 and Figure 3 To further optimize the noise reduction effect, the interior of the noise reduction housing 2 is provided with several evenly arranged noise reduction rings 21. The noise reduction rings 21 are fitted onto the inner tube 5, and the inner wall of the noise reduction rings 21 is in close contact with the outer wall of the inner tube 5. This ensures that the exhaust gas passes through the noise reduction rings 21 after passing through the inner tube 5, and that the exhaust gas is buffered by the noise reduction rings 21 during flow, releasing some of its energy, thereby further reducing the noise of the exhaust gas. The noise reduction rings 21 are provided with several air holes 22. When the exhaust gas flows, it passes through the air holes 22 and is discharged from the tail of the noise reduction housing 2. When the push plate 7 is at the front end of the inner tube 5, the exhaust gas passes through a smaller portion of the inner tube 5. At this time, the exhaust gas enters the part of the noise reduction rings 21 for rapid noise reduction. When the push plate 7 moves backward, the exhaust gas passes through different parts of the inner tube 5 and enters between different noise reduction rings 21. The gas forms a collision airflow inside, thereby realizing the energy collision and buffering of the gas, and realizing the noise reduction process of the exhaust gas.

[0023] In one embodiment, in order to ensure the fixing effect of the cover plate 3 and the inner tube 5, an installation flange is provided on the opening side of the inner tube 5. The cover plate 3 and the installation flange are fixed together by bolts. The elastic element 6 is a thrust spring. One end of the thrust spring is fixedly connected to the push plate 7, and the other end is fixedly connected to the inside of the inner tube 5.

[0024] When using, combine Figures 1-5First, the inner tube 5 is installed onto the cover plate 3 via the threaded part 51. Then, the cover plate 3 is fixed onto the muffler housing 2 with bolts. At this time, it is connected to the engine exhaust port through the exhaust gas inlet 4. After the exhaust gas enters the interior, it pushes the push plate 7 to compress the thrust spring under the action of exhaust pressure. After the exhaust gas is silenced by the inner tube 5, it enters the muffler ring 21, where it is further silenced during the flow process. Finally, it is discharged through the exhaust port 1, completing the silencing and noise reduction process. During the process of the push plate 7 experiencing force changes, when the exhaust pressure changes, the pressure is buffered and counteracted under the action of the push plate 7 and the thrust spring, thereby achieving further optimization of the silencing effect.

[0025] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An engine noise reduction device, characterized in that, include: The muffler housing has an air outlet at its rear end and an opening at the other end. A cover plate is provided at the opening of the muffler housing. The cover plate is located inside the muffler housing and has an inner tube. The inner tube has a push plate inside and an exhaust gas inlet is provided on the cover plate. The exhaust gas inlet communicates with the inside of the inner tube. Exhaust gas enters the inside of the inner tube and pushes the push plate to slide. An elastic element is provided between the push plate and the inner tube.

2. The engine noise reduction device according to claim 1, characterized in that, The pusher plate is provided with a guide bevel on the side near the exhaust gas inlet. The guide bevel guides the gas outward from the center of the pusher plate. The pusher plate is provided with several evenly arranged guide plates.

3. The engine noise reduction device according to claim 1, characterized in that, The outer wall of the inner tube is provided with several evenly arranged air vents. The position of the push plate is slidable to adjust the part of the inner tube that connects with the exhaust gas inlet and outlet.

4. The engine noise reduction device according to claim 1, characterized in that, The inner tube has a threaded portion at its top, and the inner side of the cover plate has a threaded protrusion corresponding to the threaded portion. The inner tube is installed on the cover plate through the threaded portion and the threaded protrusion.

5. The engine noise reduction device according to claim 4, characterized in that, The silencing housing has several evenly arranged silencing rings inside, and the silencing rings are fitted onto the inner tube with the inner wall of the silencing rings tightly attached to the outer wall of the inner tube.

6. The engine noise reduction device according to claim 5, characterized in that, The silencing ring is provided with several air holes.

7. The engine noise reduction device according to claim 1, characterized in that, The inner tube has an installation flange on one side of the opening, and the cover plate and the installation flange are fixed together by bolts.

8. The engine noise reduction device according to claim 1, characterized in that, The elastic element is a thrust spring, one end of which is fixedly connected to the push plate, and the other end is fixedly connected to the inside of the inner tube.

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