Multi-fold path multi-chamber motorcycle off-board sound abatement purifier
By adopting a multi-channel, multi-chamber structure and silencing hole design in the motorcycle muffler, the problems of intake pipe oxidation and poor silencing effect have been solved, resulting in better silencing effect and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MAKEWEI MASCH CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-06-12
AI Technical Summary
Existing motorcycle mufflers suffer from oxidative damage to their intake pipes, which turn white, peel, and rust due to high-temperature exhaust gases, resulting in a shortened lifespan and less than ideal noise reduction.
The design incorporates a multi-channel, multi-chamber structure. The inner cavity of the silencing sleeve is divided into multiple channels by a left-sloping silencing plate, a right-sloping silencing plate, and an arc-shaped silencing plate. Guide connecting blocks are installed at the silencing holes and guide rods to enhance gas flow and silencing effect.
It significantly improves the noise reduction effect, reduces noise pollution from exhaust emissions, and extends the service life of the muffler.
Smart Images

Figure CN224352009U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of silencers and purifiers, and relates to a multi-fold, multi-chamber motorcycle external silencer and purifier. Background Technology
[0002] The exhaust gas from engine combustion is treated by the motorcycle muffler before being released into the atmosphere. However, the exhaust gas discharged from the combustion chamber is several hundred degrees Celsius, and it enters the muffler's intake pipe directly. As a result, the muffler's intake pipe operates at a high temperature for a long time. After a period of use, the surface of the muffler's intake pipe commonly shows signs of oxidation, whitening, paint peeling, and rust, shortening the service life of the motorcycle muffler.
[0003] The existing technology patent number CN01218043.2 discloses a muffler for scooter motorcycles, which is installed on scooters powered by GY6 engines. By adding an outer intake pipe to the original intake pipe of the muffler, the high-temperature exhaust gas after engine combustion enters the muffler purifier through the inner pipe of the muffler and is discharged from the exhaust pipe. This structure ensures that the outer pipe of the intake pipe does not directly contact the high-temperature exhaust gas, thus preventing oxidation, whitening, paint peeling, and rusting of the outer pipe of the muffler intake pipe. At the same time, this structure also has a better sound insulation effect, thereby extending the service life of the scooter muffler and having a significant effect.
[0004] However, the aforementioned mufflers only have a single cavity structure, and their noise reduction effect is not ideal. Therefore, we designed a multi-channel, multi-chamber motorcycle external muffler and purifier. Utility Model Content
[0005] The purpose of this invention is to provide a multi-chamber, multi-fold motorcycle external muffler and purifier to solve the problems mentioned in the background art.
[0006] The purpose of this utility model can be achieved through the following technical solution: a multi-cavity, multi-section motorcycle external muffler purifier, including a muffler sleeve, an exhaust gas discharge end cap, and an exhaust pipe mounting sleeve. One end opening of the muffler sleeve is welded to the exhaust pipe mounting sleeve, and the exhaust gas discharge end cap is clipped at the other end opening of the muffler sleeve. It also includes a left-angled muffler plate, a right-angled muffler plate, and an arc-shaped muffler plate. The left-angled muffler plate and the right-angled muffler plate are installed on the left and right sides of the muffler sleeve, respectively. The arc-shaped muffler plate is located between the left-angled muffler plate and the right-angled muffler plate and is connected to the bottom side wall of the muffler sleeve. The left-angled muffler plate, the right-angled muffler plate, and the arc-shaped muffler plate divide the inner cavity of the muffler sleeve into a first cavity, a second cavity, a third cavity, and a fourth cavity.
[0007] In the aforementioned multi-chamber motorcycle external muffler, an adjusting sliding seat is installed on the top of the left-side inclined muffler plate, and the adjusting sliding seat is connected to the top side wall of the muffler sleeve. This design allows for easy adjustment of the volume of the third and fourth chambers, facilitating better noise reduction and minimizing the impact of exhaust gas on the left-side inclined muffler plate.
[0008] In the aforementioned multi-chamber, multi-channel motorcycle external muffler and purifier, a guide connecting block is installed at the end of the arc-shaped muffler plate, and a guide rod is installed at the guide hole of the guide connecting block. The guide rod is parallel to and connected to the right-angled muffler plate. The purpose of this arrangement is to facilitate the connection between the second and third chambers, increase the muffler area, and simultaneously accelerate the gas flow rate, resulting in smoother exhaust.
[0009] In the aforementioned multi-chamber, multi-channel motorcycle external noise purifier, the surfaces of the left-sloping noise-reducing plate, the right-sloping noise-reducing plate, and the arc-shaped noise-reducing plate are all provided with noise-reducing holes, each with a curved surface. This design facilitates ventilation while reducing noise.
[0010] In the aforementioned multi-chamber, multi-channel motorcycle external muffler and purifier, an exhaust window is provided at one end of the exhaust outlet cover, and a metal exhaust mesh is installed inside the exhaust window. This design facilitates the exhaust of exhaust gases while simultaneously filtering and purifying impurities in the exhaust.
[0011] In the aforementioned multi-chamber, multi-channel motorcycle external muffler, a positioning pin is installed at the top of the metal exhaust mesh, and the positioning pin is pinned to the exhaust end cover. This design facilitates the positioning and installation of the metal exhaust mesh, making future handling and replacement easier.
[0012] Compared with the prior art, the advantages of this multi-chamber motorcycle external muffler are as follows: by installing a left-angled muffler plate, a right-angled muffler plate, and an arc-shaped muffler plate inside the muffler sleeve, the inner cavity of the muffler sleeve is divided into a first cavity, a second cavity, a third cavity, and a fourth cavity, thereby realizing multiple chambers for muffler operation, which greatly ensures the muffler effect and reduces noise pollution from exhaust emissions. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the multi-fold multi-chamber motorcycle external muffler and purifier of this utility model.
[0014] Figure 2 This is a three-dimensional structural diagram of the multi-fold multi-chamber motorcycle external muffler and purifier of this utility model.
[0015] Figure 3This is a three-dimensional structural diagram of the multi-fold multi-chamber motorcycle external muffler and purifier of this utility model.
[0016] Figure 4 This is a three-dimensional structural diagram of the multi-fold multi-chamber motorcycle external muffler and purifier of this utility model.
[0017] In the diagram, 1. Silencer sleeve; 2. Exhaust gas discharge end cap; 3. Metal exhaust mesh; 4. Exhaust pipe mounting sleeve; 5. First cavity; 6. Second cavity; 7. Third cavity; 8. Fourth cavity; 9. Adjusting sliding seat; 10. Left inclined silencer plate; 11. Right inclined silencer plate; 12. Silencer hole; 13. Guide rod; 14. Guide connecting block; 15. Arc-shaped silencer plate; 16. Exhaust window; 17. Positioning pin. Detailed Implementation
[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0019] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model is a multi-fold multi-chamber motorcycle external noise purifier;
[0020] Example 1: The silencer includes a silencer sleeve 1, an exhaust end cap 2, and an exhaust pipe mounting sleeve 4. One end of the silencer sleeve 1 is welded to the exhaust pipe mounting sleeve 4. The exhaust end cap 2 is secured to the other end of the silencer sleeve 1. It also includes a left-angled silencer plate 10, a right-angled silencer plate 11, and an arc-shaped silencer plate 15. The left-angled silencer plate 10 and the right-angled silencer plate 11 are installed on the left and right sides of the silencer sleeve 1, respectively. The arc-shaped silencer plate 15 is located between the left-angled silencer plate 10 and the right-angled silencer plate 11 and is connected to the bottom side wall of the silencer sleeve 1. The left-angled silencer plate 10, the right-angled silencer plate 11, and the arc-shaped silencer plate 15 divide the inner cavity of the silencer sleeve 1 into a first cavity 5, a second cavity 6, a third cavity 7, and a fourth cavity 8. By using four cavities, multiple chambers can perform silencing operations, greatly ensuring the silencing effect and reducing noise pollution from exhaust emissions.
[0021] Among them, the surfaces of the left inclined silencing plate 10, the right inclined silencing plate 11 and the arc-shaped silencing plate 15 are all provided with silencing holes 12, and each silencing hole 12 is set with a curved surface.
[0022] Example 2: Based on Example 1, an adjusting sliding seat 9 is installed on the top of the left inclined muffler 10. The adjusting sliding seat 9 is connected to the top side wall of the muffler sleeve 1. The adjusting sliding seat 9 facilitates the adjustment of the volume of the third and fourth cavities, which helps to better achieve the purpose of reducing noise, while reducing the impact effect of gas on the left inclined muffler during the exhaust process.
[0023] like Figure 3 As shown in Embodiment 3: The silencer includes a silencer sleeve 1, an exhaust gas discharge end cap 2, and an exhaust pipe mounting sleeve 4. One end of the silencer sleeve 1 is welded to the exhaust pipe mounting sleeve 4. The exhaust gas discharge end cap 2 is secured to the other end of the silencer sleeve 1. It also includes a left-angled silencer plate 10, a right-angled silencer plate 11, and an arc-shaped silencer plate 15. The left-angled silencer plate 10 and the right-angled silencer plate 11 are installed on the left and right sides of the silencer sleeve 1, respectively. The arc-shaped silencer plate 15 is located on the left-angled silencer... The left inclined silencing plate 10 and the right inclined silencing plate 11 are connected to the bottom side wall of the silencing sleeve 1. The left inclined silencing plate 10, the right inclined silencing plate 11 and the arc-shaped silencing plate 15 divide the inner cavity of the silencing sleeve 1 into the first cavity 5, the second cavity 6, the third cavity 7 and the fourth cavity 8. The end of the arc-shaped silencing plate 15 is equipped with a guide connecting block 14. A guide rod 13 is installed at the guide hole of the guide connecting block 14. The guide rod 13 is parallel to the right inclined silencing plate 11 and connected to the right inclined silencing plate 11.
[0024] In Example 3, as exhaust gas enters through the exhaust port of the exhaust pipe mounting sleeve 4, the pressure and temperature of the space in the first cavity 5 and the second cavity 6 continuously increase as exhaust gas enters. When the critical value is reached, the driving force of the air pressure causes the guide connecting block 14 to connect the second cavity 6 and the third cavity 7 along the moving guide rod 13, thereby increasing the silencing range and accelerating the gas flow rate, making the exhaust smoother.
[0025] Example 4: The silencer includes a silencer sleeve 1, an exhaust gas discharge end cap 2, and an exhaust pipe mounting sleeve 4. One end of the silencer sleeve 1 is welded to the exhaust pipe mounting sleeve 4. The exhaust gas discharge end cap 2 is secured to the other end of the silencer sleeve 1. It also includes a left-angled silencer plate 10, a right-angled silencer plate 11, and an arc-shaped silencer plate 15. The left-angled silencer plate 10 and the right-angled silencer plate 11 are installed on the left and right sides of the silencer sleeve 1, respectively. The arc-shaped silencer plate 15 is located between the left-angled silencer plate 10 and the right-angled silencer plate 11. The muffler plates 11 are connected to the bottom side wall of the muffler sleeve 1. The left inclined muffler plate 10, the right inclined muffler plate 11 and the arc-shaped muffler plate 15 divide the inner cavity of the muffler sleeve 1 into the first cavity 5, the second cavity 6, the third cavity 7 and the fourth cavity 8. An exhaust window 16 is opened at one end of the exhaust end cover 2. A metal exhaust mesh 3 is provided inside the exhaust window 16. A positioning pin 17 is installed at the top of the metal exhaust mesh 3. The positioning pin 17 is pinned to the exhaust end cover 2.
[0026] The exhaust gas is discharged using a metal exhaust mesh 3, which also has the function of purifying the exhaust gas, such as containing purifying substances like activated carbon.
[0027] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.
Claims
1. A multi-chamber, multi-section motorcycle external muffler and purifier, comprising a muffler sleeve (1), an exhaust gas discharge end cap (2), and an exhaust pipe mounting sleeve (4), wherein one end opening of the muffler sleeve (1) is welded to the exhaust pipe mounting sleeve (4), and the exhaust gas discharge end cap (2) is secured at the other end opening of the muffler sleeve (1), characterized in that, It also includes a left-angled muffler plate (10), a right-angled muffler plate (11), and an arc-shaped muffler plate (15). The left-angled muffler plate (10) and the right-angled muffler plate (11) are installed on the left and right sides of the muffler sleeve (1). The arc-shaped muffler plate (15) is located between the left-angled muffler plate (10) and the right-angled muffler plate (11) and is connected to the bottom side wall of the muffler sleeve (1). The left-angled muffler plate (10), the right-angled muffler plate (11), and the arc-shaped muffler plate (15) divide the inner cavity of the muffler sleeve (1) into a first cavity (5), a second cavity (6), a third cavity (7), and a fourth cavity (8).
2. The multi-chamber, multi-channel motorcycle external noise purifier according to claim 1, characterized in that, An adjusting sliding seat (9) is installed on the top of the left inclined silencing plate (10), and the adjusting sliding seat (9) is connected to the top side wall of the silencing sleeve (1).
3. The multi-chamber, multi-channel motorcycle external noise purifier according to claim 1, characterized in that, The end of the arc-shaped muffler plate (15) is equipped with a guide connecting block (14), and a guide rod (13) is installed at the guide hole of the guide connecting block (14). The guide rod (13) is parallel to the right inclined muffler plate (11) and connected to the right inclined muffler plate (11).
4. The multi-chamber, multi-channel motorcycle external noise purifier according to claim 1, characterized in that, The surfaces of the left inclined silencing plate (10), the right inclined silencing plate (11) and the arc-shaped silencing plate (15) are all provided with silencing holes (12), and each silencing hole (12) is curved.
5. The multi-chamber, multi-cavity motorcycle external noise purifier according to claim 1, characterized in that, An exhaust window (16) is provided at one end of the exhaust end cap (2), and a metal exhaust mesh (3) is provided inside the exhaust window (16).
6. The multi-chamber, multi-channel motorcycle external noise purifier according to claim 5, characterized in that, The top of the metal exhaust mesh (3) is equipped with a positioning pin (17), which is pinned to the exhaust end cover (2).