A motorcycle noise reduction muffler

Abstract

The present application relates to the technical field of motorcycle noise reduction muffler, in particular to a motorcycle noise reduction muffler, which comprises a muffler body, a noise reduction mechanism, a heat insulation mechanism and an exhaust mechanism, the noise reduction mechanism is fixedly installed at the tail end of the muffler body, the noise reduction mechanism absorbs the sound waves emitted by the muffler body through a porous structure, adjusts the noise reduction degree according to the vehicle speed, helps to disperse the airflow, and restrains the airflow at the outlet, thereby reducing the noise, the space inside the noise reduction mechanism diffuses the airflow before reaching the outlet, which helps to reduce the speed and pressure of the airflow, thereby reducing the generation of noise, the heat insulation mechanism is above the muffler body, the heat insulation mechanism adjusts the distance from the motorcycle exhaust pipe according to the temperature; the exhaust mechanism is fixedly installed at one end of the noise reduction mechanism, the exhaust mechanism disperses the gas flow inside the noise reduction mechanism, and absorbs the noise generated by the motorcycle driving through the cooperation of the turbulence and the noise reduction mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motorcycle noise reduction mufflers, in particular to a motorcycle noise reduction muffler. BACKGROUND

[0002] A motorcycle noise reduction muffler is a technical device used to reduce motorcycle exhaust noise. In the past few decades, the use of motorcycles has increased, but at the same time, it has also caused noise pollution problems. Motorcycle exhaust noise has had adverse effects on both the driver and the surrounding environment, including the driver's hearing health, the peace of surrounding residents, and the comfort of the urban environment.

[0003] Noise reduction mufflers have become an important research field for reducing motorcycle noise pollution. Noise reduction mufflers aim to reduce the noise generated in the exhaust system and reduce the energy of noise propagation to the surrounding environment, thereby improving the environmental effects of motorcycle use. Current existing noise reduction mufflers only meet the regulations for exhaust noise between regions. Common materials include stainless steel, titanium alloy, aluminum alloy, etc. These materials have good high-temperature resistance and corrosion resistance. The structural design involves internal sound attenuation devices such as sound attenuation cotton and sound attenuation pipes. These designs aim to reduce noise propagation through sound absorption, scattering, reflection, etc. Finally, the design of noise reduction mufflers also needs to consider the requirements of regulations and standards. Traditional motorcycle noise reduction mufflers can reduce some exhaust noise, but the control effect on high-frequency noise and specific frequency band noise is limited, especially at high speeds or under high load conditions, the noise level is still high, affecting the comfort of the driver and the peace of the surrounding environment.

[0004] In view of the above situation, in order to overcome the above technical problems, the present application designs a motorcycle noise reduction muffler, which solves the above technical problems. SUMMARY

[0005] The technical problem to be solved by the present application is to improve the noise reduction of the motorcycle muffler by designing a space structure at the outlet of the muffler to improve the noise reduction effect.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] The application provides a motorcycle noise reduction muffler, which comprises a muffler body, a noise reduction mechanism, a heat insulation mechanism and an exhaust mechanism, characterized in that: the tail end of the muffler body is fixedly installed with the noise reduction mechanism, the muffler body and the noise reduction mechanism are connected in a sliding mode, the noise reduction mechanism absorbs sound waves emitted by the muffler body through a porous structure, and simultaneously adjusts the noise reduction degree according to the vehicle speed; the heat insulation mechanism is fixedly connected above the muffler body in a sliding mode, the heat insulation mechanism adjusts the distance from the motorcycle exhaust pipe according to the temperature; the exhaust mechanism is fixedly installed at one end of the noise reduction mechanism, the exhaust mechanism and the noise reduction mechanism are connected in a welding or bolt connection mode, and the exhaust mechanism disperses the gas flow in the noise reduction mechanism and absorbs the noise generated by the motorcycle driving through the disturbance and cooperation of the noise reduction mechanism.

[0008] Based on the design, the noise reduction mechanism helps to disperse the airflow and constrain the airflow at the outlet, thereby reducing the noise, the space in the noise reduction mechanism helps to diffuse the airflow before reaching the outlet, thereby reducing the speed and pressure of the airflow and reducing the generation of noise, the heat insulation mechanism is used for reducing the heat generated by the high-temperature combustion gas and the working process in the muffler, which can reduce the temperature of the surface of the muffler body and reduce the noise, and the exhaust mechanism is connected with the noise reduction mechanism, which helps to disperse the airflow in the noise reduction mechanism, which helps to balance the gas flow and further reduce the noise level.

[0009] Preferably, the noise reduction mechanism comprises a movable assembly, an expansion chamber, a double-layer funnel and a wind resistance plate, the movable assembly is fixedly installed at the tail end of the muffler body, the length of the movable assembly is 3-6 cm, the movable assembly is connected with the muffler in a hinged connection mode, the expansion chamber is fixedly installed above the movable assembly in a welding connection mode, six wind resistance assemblies are fixedly installed at the left side of the middle of the expansion chamber in a sliding connection mode, the height of the wind resistance assembly is 1 / 2 of the length of the expansion chamber, the expansion chamber and the movable assembly are connected in a welding or hinged connection mode, the diameter ratio of the expansion chamber to the diameter of the muffler body is 6:5, the double-layer funnel is fixedly installed at one end of the middle position of the expansion chamber in a welding connection mode, the wind resistance plate is fixedly installed at the other end of the double-layer funnel in a welding connection mode, the wind resistance plate surrounds the expansion chamber in a circular ring structure.

[0010] Some points worth mentioning

[0011] First, the length of the movable component is 3-6 cm, which can better connect the noise reduction mechanism with the muffler body, fix it more stably, prevent the noise reduction mechanism from being impacted too strongly by the airflow inside the muffler, and cause it to fall off. If the length is too long, it will make the installation process more difficult, and the length of the tail end of the muffler body will also be closer to the internal structure of the expansion chamber, causing damage to the internal mechanism. If the length is too small, it may easily fall off. The movable component can absorb and reduce the vibration and impact force generated by the engine exhaust. When the exhaust airflow passes through the muffler, the elasticity of the spring can slow down the impact of the airflow, thereby reducing the transmission of vibration and noise and protecting the structural integrity of the muffler.

[0012] Second, the expansion chamber is fixedly installed above the movable component, and the connection method can be welding or hinging. The diameter of the expansion chamber is 6:5 compared to the diameter of the muffler body, which can better expand the airflow space and reduce noise. If it is greater than 6:5, it will result in a large volume and waste of materials. When the volume is too large, it will affect the balance of the motorcycle and may cause injury or death. If the diameter is too small, it will not be able to control the airflow better and may result in greater noise from the motorcycle, thereby not achieving better results.

[0013] Third, the design of the double-layer funnel can help guide and disperse the airflow, making it pass through the muffler system in a more stable manner. The airflow will experience a series of turns and diffusion when passing through the expansion chamber. This change in flow path helps to reduce the generation and propagation of noise. Moreover, the presence of the double-layer funnel changes the speed and direction of the airflow, allowing it to pass through the expansion chamber more effectively. Since the diameter of the double-layer funnel is smaller than that of the expansion chamber, the airflow will accelerate when passing through the funnel, thereby improving the flow efficiency of the gas in the expansion chamber. The double-layer funnel is fixedly installed on the expansion chamber at one end, which makes the entire system structure more compact and occupies less space, which is advantageous for the integration and installation of the exhaust system. By guiding and controlling the flow of the airflow, the double-layer funnel helps to improve exhaust efficiency, which can improve engine performance and reduce exhaust emissions.

[0014] Fourthly, the circular structure of the baffle can effectively guide the airflow through the muffler system. When the airflow passes through the baffle, it is constrained and guided to flow more orderly, which helps to optimize the flow path of the airflow and improve the efficiency of the system. The presence of the baffle can also help to block the propagation of noise from the expansion chamber and the double-layer funnel. The circular structure provides an additional barrier to reduce the leakage and propagation of noise, thereby further reducing the overall noise level. By welding the baffle to the double-layer funnel, the structural strength and stability of the baffle can be ensured, which prevents the baffle from loosening or deforming under high temperature and high pressure conditions, ensuring the reliability and durability of the system. The circular structure of the baffle surrounds the expansion chamber and occupies a small space, making the entire muffler system more compact, which is very important for the design and integration of the exhaust system.

[0015] Preferably, the movable assembly includes a baffle groove and a spring. The baffle groove is fixedly installed above the tail end of the muffler body, and the installation method is a hinged connection. The baffle groove is composed of four grooves to form a cylinder. The bottom end of the baffle groove is designed as a chamfer. The baffle groove is made of carbon steel. The baffle groove is fixedly installed with the extension spring. The installation method of the baffle groove and the extension spring is welding connection. The other end of the four extension springs is fixedly installed with one end of the expansion chamber.

[0016] By fixing the baffle groove above the tail end of the muffler body, it helps to prevent the baffle groove from loosening or deforming during operation, ensuring the reliability of the system. The design of the groove can increase the surface area of the baffle, thereby enhancing the heat transfer and heat dissipation effect. By increasing the surface area, the absorption and dissipation capacity of the baffle for high-temperature gas and heat generated during operation can be improved, thereby reducing the temperature and protecting other components of the muffler. The chamfer design at the bottom end can reduce friction during installation and improve the service life of the parts, which helps to improve the flow efficiency of the airflow and reduce the impact of the system on the exhaust performance. By installing springs on the baffle groove, the propagation of noise can be effectively reduced. The presence of springs can also absorb and dampen the noise vibrations in the airflow, thereby reducing the overall noise. The baffle groove is made of carbon steel, which has good heat conduction performance, which helps to effectively disperse and dissipate the high-temperature combustion gas generated during the exhaust process and the heat inside the muffler, reducing the system temperature and improving the durability. By fixing the other end of the four springs to one end of the expansion chamber, the space can be saved to the greatest extent and the compactness of the entire system can be improved, which is particularly important for the design and installation of the exhaust system in limited space.

[0017] Preferably, the expansion chamber adopts a circular arc shape. The expansion chamber is divided into two parts by the bending place. One half is the expansion chamber inside which mainly has a double-layer funnel, and the other half is the airflow chamber in which three layers of cylinders are mainly provided.

[0018] The main design features, the arc-shaped expansion chamber design helps to optimize the flow and diffusion process of air flow, through reasonable bending and zoning design, can reduce the resistance and turbulence of air flow, improve the flow efficiency of air flow, so as to optimize the exhaust performance and reduce the noise level, the advantage of three layers of cylinder is to set three layers of cylinder in the other half of the air flow, further optimize the flow and noise reduction effect of air flow, the setting of three layers of cylinder can increase the contact area between air flow and sound insulation material, provide better sound insulation effect, through reasonable design of the structure of the expansion chamber, multi-level air flow control and noise reduction can be realized in limited space, so that the space of the exhaust system can be effectively utilized, and the size of the entire silencer is more compact, which is suitable for various installation environments.

[0019] Preferably, the wind resistance assembly comprises a wind resistance cylinder, a guide plate, a guide hole, a baffle, a rectangular groove, a fixed column and a limiting spring, the wind resistance cylinder is fixedly installed inside the expansion chamber, the guide plate is fixedly installed inside the wind resistance cylinder, the shape of the guide plate is triangular, the baffle is fixedly installed on the upper end of the wind resistance cylinder, the included angle between the baffle and the wind resistance cylinder is 45°, there is a triangular groove below the baffle, a rectangular groove is formed on the upper end of the expansion chamber, the fixed column is fixedly installed on the rectangular groove, the center of the baffle is fixedly installed below the fixed column, one end of the limiting spring is fixedly installed on the baffle, and the other end of the limiting spring is fixedly installed on the expansion chamber.

[0020] The guide plate is triangular in shape, mainly when the exhaust gas is discharged, the guide plate will discharge the exhaust gas to both ends, thereby dispersing the exhaust gas and having a buffering capacity for air flow, the included angle between the baffle and the wind resistance cylinder is 45°, which can be tilted faster when the wind speed is fast during driving, so as to discharge the internal exhaust gas, and the vertical baffle outside the wind can help to gather the center of the wind resistance assembly, so as to better achieve the silencing effect, the triangular groove below the baffle can shunt the exhaust gas discharge to achieve better silent effect, the limiting spring is designed to pull back the baffle when the motorcycle stops, and also has a protection effect on the baffle, reduces the bearing pressure of the baffle, and saves cost.

[0021] Preferably, the double-layer funnel includes a conical funnel, a conical hole, a wind flow funnel, and a wind flow hole. The conical funnel is fixedly installed at the center of the expansion chamber, and is connected to the expansion chamber by welding. The height of the conical funnel is half the height of the expansion chamber, and the diameter of the conical funnel is 4 / 5 of the diameter of the expansion chamber. The conical hole is formed in the conical funnel. The wind flow funnel is fixedly installed at the middle of the conical funnel, and is connected to the conical funnel by welding. The diameter of the wind flow funnel is 1 / 2 of the diameter of the conical funnel. The wind flow hole is formed in the wind flow funnel.

[0022] The conical funnel is fixedly installed at the center of the expansion chamber, and is connected to the expansion chamber by welding. The height of the conical funnel is half the height of the expansion chamber, and the diameter of the conical funnel is 4 / 5 of the diameter of the expansion chamber. The conical hole is formed in the conical funnel. The wind flow funnel is fixedly installed at the middle of the conical funnel, and is connected to the conical funnel by welding. The diameter of the wind flow funnel is 1 / 2 of the diameter of the conical funnel. The wind flow hole is formed in the wind flow funnel.

[0023] Preferably, the wind baffle is made of aluminum alloy material, and the angle between the wind baffle and the expansion chamber, the conical funnel, and the wind flow funnel is inclined inward by 15°.

[0024] The wind baffle is made of aluminum alloy material, which can achieve lightweight structure and has excellent corrosion resistance. Aluminum alloy has high strength and good oxidation resistance, which is suitable for use in high temperature and humidity conditions. At the same time, the weight of the overall device is reduced. The inward inclination angle between the wind baffle and the expansion chamber, the conical funnel, and the wind flow funnel is 15°. This design helps to guide the airflow inwardly and improve the flow rate and pressure of the airflow, which can improve the noise reduction effect of the muffler system and increase the exhaust performance of the system. The presence of the wind baffle can provide additional structural support, enhance the stability and durability of the entire muffler, and reduce vibration and displacement.

[0025] Preferably, the heat insulation mechanism comprises a heat insulation plate, a heat insulation spring, a spring plate and a spring hole, one end of the heat insulation plate is fixedly installed on the baffle groove, the installation mode adopts welding connection, the other end of the heat insulation plate is fixedly installed on the muffler body, the installation mode adopts sliding connection, the diameter ratio of the heat insulation plate to the muffler body is 6:5, the heat insulation spring is fixedly installed at the lower end of the heat insulation plate, the installation mode adopts welding connection, the heat insulation spring is dispersed at the lower end of the heat insulation plate, the spring plate is fixedly installed below the heat insulation spring, the installation mode of the spring plate and the heat insulation spring adopts welding or hinged connection, one end of the spring plate is inclined by 150°, and the spring hole is formed in the spring plate.

[0026] Based on this design, the heat insulation plate can effectively reduce the high-temperature combustion gas in the engine exhaust process and the heat generated in the internal working process of the muffler, the diameter ratio of the heat insulation plate to the muffler body is 6:5, which helps to provide appropriate coverage area and heat insulation performance, the heat insulation spring is dispersedly arranged below the heat insulation plate, which can effectively reduce heat conduction and heat radiation, prevent heat transfer to the muffler body, and further improve the heat insulation effect, the spring plate is fixed below the heat insulation spring, one end of which is inclined outward by 150°, which helps to balance the compression force of the spring and the supporting effect on the heat insulation spring, and can better install during installation, reduce wear and tear on parts, thereby improving the service life of the parts, and the spring hole helps to discharge heat. The inclination of 150° of the spring plate can allow the outside wind to blow in during driving, achieving better cooling effect.

[0027] Preferably, the exhaust mechanism comprises a fixed plate, a fixed groove and a fixed hole, the fixed plate is fixedly installed at the outer end of the noise reduction mechanism, the fixed groove and the fixed hole are formed in the fixed plate, the diameter of the fixed groove is the same as the diameter formed by the air resistance plate, the fixed groove is recessed inward by 2 cm, the fixed hole is fixedly installed at the center position of the fixed plate, and the diameter of the fixed hole is the same as the larger diameter in the air flow funnel.

[0028] This structure can provide reliable support and fixation, so that the exhaust mechanism can withstand the airflow and pressure of engine exhaust, the design of the fixed groove helps to reduce the resistance of the airflow when passing through the exhaust mechanism, the diameter of the fixed groove is the same as the diameter formed by the air resistance plate, which ensures the smooth flow of the airflow during the exhaust process, the recess of the groove inward by 2 cm can change the flow trajectory of the airflow, further reducing the resistance of the airflow and improving the exhaust efficiency, the fixed hole is fixedly installed at the center position of the fixed plate and is firmly fixed by welding or other appropriate connection methods, the diameter of the fixed hole is the same as the larger diameter in the air flow funnel, which ensures the smooth passage of the airflow, and the existence of the fixed hole helps to maintain the balance and stability of the airflow, avoiding uneven distribution of the airflow and fluctuation of the pressure.

[0029] The beneficial effects of the present application are as follows:

[0030] 1. The motorcycle noise reduction muffler of the present application can effectively reduce exhaust noise, provide a quieter driving experience, help improve the comfort of the driver, reduce the disturbance of noise to the surrounding environment and other road users, reduce noise to reduce driving fatigue and stress, lower noise allows the driver to better listen to traffic signals, vehicle operating conditions and sounds from the surrounding environment, thereby improving the driver's perception of road safety, providing a more stable and enjoyable driving experience.

[0031] 2. By designing the noise reduction mechanism, it helps to disperse the airflow and constrain the airflow at the outlet, thereby reducing the noise. The space inside the noise reduction mechanism allows the airflow to diffuse before reaching the outlet, which helps to reduce the speed and pressure of the airflow, thereby reducing the generation of noise. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 is the overall schematic diagram of the present application;

[0034] Figure 2 is the schematic diagram of the noise reduction mechanism of the present application;

[0035] Figure 3 is the schematic diagram of the expansion chamber of the present application;

[0036] Figure 4 is the enlarged schematic diagram of the limiting spring of the present application;

[0037] Figure 5 is the schematic diagram of the spring assembly of the present application;

[0038] Figure 6 is the schematic diagram of the wind resistance assembly of the present application;

[0039] Figure 7 is the schematic diagram of the gas flow direction of the present application;

[0040] Figure 8 is the schematic diagram of the air flow chamber of the present application;

[0041] Figure 9 is the schematic diagram of the double-layer funnel of the present application;

[0042] Figure 10is a sectional view of the exhaust mechanism of the present application;

[0043] Figure 11 is a sectional view of the heat insulation mechanism of the present application.

[0044] In the figure: 1, muffler body; 2, noise reduction mechanism; 21, movable assembly; 211, baffle groove; 212, extension spring; 22, expansion chamber; 221, expansion room; 222, air flow room; 223, three-layer cylinder; 23, wind resistance assembly; 231, wind resistance cylinder; 232, guide plate; 233, guide hole; 234, baffle; 235, rectangular groove; 236, fixed column; 237, limit spring; 24, double-layer funnel; 241, conical funnel; 242, conical hole; 243, air flow funnel; 244, air flow hole; 25, wind resistance plate; 3, heat insulation mechanism; 31, heat insulation plate; 32, heat insulation spring; 33, spring plate; 34, spring hole; 4, exhaust mechanism; 41, fixed plate; 42, fixed groove; 43, fixed hole. DETAILED DESCRIPTION

[0045] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0046] As Figure 1 shown, the present application provides a motorcycle noise reduction muffler, which comprises a muffler body 1, a noise reduction mechanism 2, a heat insulation mechanism 3 and an exhaust mechanism 4, characterized in that: the tail end of the muffler body 1 is fixedly installed with the noise reduction mechanism 2, the muffler body 1 and the noise reduction mechanism 2 are connected in a sliding manner, the noise reduction mechanism 2 is used to diffuse the airflow emitted by the muffler body 1 to a spacious space first, and the air is constrained at the outlet, the noise reduction mechanism 2 absorbs the sound waves emitted by the muffler body through a porous structure, and adjusts the noise reduction degree according to the vehicle speed; the heat insulation mechanism 3 is fixedly connected above the muffler body 1, and the connection mode adopts sliding installation, the heat insulation mechanism adjusts the distance from the motorcycle exhaust pipe according to the temperature; the exhaust mechanism 4 is fixedly installed at one end of the noise reduction mechanism 2, the exhaust mechanism 4 and the noise reduction mechanism 2 are connected in a bolted manner, and the exhaust mechanism 4 disperses the gas flow in the noise reduction mechanism 2, and absorbs the noise emitted by the motorcycle running through the turbulence and cooperation with the noise reduction mechanism 2.

[0047] The noise reduction mechanism 2 helps to disperse the airflow and constrain the airflow at the outlet, thereby reducing the noise. The space inside the noise reduction mechanism 2 allows the airflow to spread before reaching the outlet, which helps to reduce the speed and pressure of the airflow, thereby reducing the generation of noise. The heat insulation mechanism 3 is used to reduce the heat generated by the high-temperature combustion gas and the internal working process of the muffler. It can reduce the temperature of the surface of the muffler body 1 and reduce the noise. The exhaust mechanism 4 is connected to the noise reduction mechanism 2, which helps to disperse the airflow inside the noise reduction mechanism 2. This helps to balance the gas flow and further reduce the noise level.

[0048] As shown in Figure 2 The noise reduction mechanism 2 includes a movable component 21, an expansion chamber 22, a wind resistance component 23, a double-layer funnel 24, and a wind resistance plate 25. The movable component 21 is fixedly installed around the tail end of the muffler body 1. The movable component 21 is connected to the muffler using a hinged connection. The expansion chamber 22 is fixedly installed above the movable component 21. The expansion chamber 22 is connected to the movable component 21 using a hinged connection. The diameter of the expansion chamber 22 is 6:5 compared to the diameter of the muffler body 1. The double-layer funnel 24 is fixedly installed at one end of the middle position of the expansion chamber 22. The double-layer funnel 24 is connected to the expansion chamber 22 using a welded connection. The other end is fixedly installed with the wind resistance plate 25 using a welded connection. The wind resistance plate 25 adopts a circular ring structure to surround the expansion chamber 22.

[0049] The movable component 21 can absorb and mitigate the vibrations and impact forces generated by the engine exhaust, and the elasticity of the spring can slow down the impact of the airflow when it passes through the muffler, thereby reducing the transmission of vibrations and noise. The hinged connection allows for a flexible connection between the movable component 21 and the muffler body 1, which can reduce the impact of external vibrations and impacts on the muffler, protecting its structural integrity. The noise reduction effect can be optimized by adjusting the tension of the spring or replacing it with a spring of different hardness, which ensures the long-term reliability and stability of the movable component 21. The diameter of the expansion chamber 22 is 6:5 compared to the diameter of the muffler body 1, which can better expand the airflow space and reduce noise. The design of the double-horn 24 can help guide and disperse the airflow, making it pass through the muffler system in a more stable manner. The airflow experiences a series of turns and diffusion when passing through the expansion chamber 22, which helps to reduce the generation and propagation of noise. The presence of the double-horn 24 changes the speed and direction of the airflow, making it more efficient to pass through the expansion chamber 22, thereby improving the flow efficiency of the gas in the expansion chamber 22. The design of the double-horn 24 is fixedly installed at one end of the expansion chamber 22, which makes the overall system structure more compact, which is beneficial for the integration and installation of the exhaust system. By guiding and controlling the flow of the airflow, the double-horn 24 helps to improve the exhaust efficiency, which can improve the engine performance and reduce the exhaust emissions. The circular ring structure of the baffle 25 can effectively guide the airflow through the muffler system. The airflow is constrained and guided when passing through the baffle 25, making its flow more orderly, which helps to optimize the flow path of the airflow and improve the efficiency of the system. The presence of the baffle 25 also helps to block the propagation of noise from the expansion chamber 22 and the double-horn 24. The circular ring structure provides an additional barrier to reduce the leakage and propagation of noise, thereby further reducing the overall noise level. The baffle 25 is firmly connected to the double-horn 24 by welding, which can ensure the strength and stability of its structure, preventing it from loosening or deforming in high-temperature and high-pressure environments, thereby ensuring the reliability and durability of the system. The circular ring structure of the baffle 25 surrounds the expansion chamber 22, occupying a small space, making the entire muffler system more compact, which is very important for the design and integration of the exhaust system.

[0050] As Figure 4 And 5As shown, the movable assembly 21 includes a baffle groove 211 and a telescopic spring 212, the baffle groove 211 is fixedly installed above the tail end of the muffler body 1, the installation method adopts a hinged connection, the baffle groove 211 is composed of four grooves to form a cylinder, the bottom end of the baffle groove 211 is designed as a chamfer, the baffle groove 211 is made of carbon steel, the telescopic spring 212 is fixedly installed on the baffle groove 211, the installation method of the baffle groove 211 and the telescopic spring 212 is welding connection, the other end of the four telescopic springs 212 is fixedly installed on one end of the expansion chamber 22.

[0051] By fixing the baffle groove 211 above the tail end of the muffler body 1, it helps to prevent the baffle groove 211 from loosening or deforming during operation, ensuring the reliability of the system, the groove can increase the surface area of the baffle, thereby enhancing heat transfer and heat dissipation effect, by increasing the surface area, the absorption and emission capacity of the baffle to high temperature gas and heat generated during operation can be improved, thereby reducing the temperature and protecting other components of the muffler, the chamfer at the bottom end can reduce friction during installation, improve the service life of the parts, which helps to improve the flow efficiency of the airflow and reduce the impact of the system on the exhaust performance, by installing springs on the baffle groove 211, the propagation of noise can be effectively reduced, the presence of springs can also absorb and dampen the noise vibration in the airflow, thereby reducing the overall noise, the baffle groove 211 is made of carbon steel, which has good heat conduction performance, helping to effectively disperse and dissipate the high temperature combustion gas generated during the exhaust process and the heat inside the muffler, reducing the system temperature and improving durability, by fixing the other end of the four springs on one end of the expansion chamber 22, the space can be saved to the greatest extent and the compactness of the entire system can be improved, which is particularly important for the design and installation of the exhaust system in limited space.

[0052] As shown in Figure 8 The expansion chamber 22 adopts a circular arc shape, the expansion chamber 22 is divided into two parts by the bending place, one half is the expansion chamber 221, the inside of which is mainly provided with a double-layer funnel 24, and the other half is the airflow chamber 222, which is mainly provided with three layers of cylindrical 223.

[0053] When the airflow passes through the circular arc-shaped expansion chamber 22, it helps to optimize the flow and diffusion process of the airflow, which can reduce the resistance and turbulence of the airflow, improve the flow efficiency of the airflow, and thus optimize the exhaust performance and reduce the noise level, when the gas enters the three layers of cylindrical 223, the flow and noise reduction effect of the airflow is further optimized, the setting of the three layers of cylindrical 223 can increase the contact area between the airflow and the sound insulation material, providing better sound insulation effect, by reasonably designing the structure of the expansion chamber 22, multi-level airflow control and noise reduction can be achieved in limited space, which can effectively utilize the space of the exhaust system, making the size of the entire muffler more compact.

[0054] The wind blocking assembly 23 includes a wind blocking cylinder 231, a guide plate 232, a guide hole 233, a baffle 234, a rectangular groove 235, a fixed column 236 and a limiting spring 237. The wind blocking cylinder 231 is fixedly installed inside the expansion chamber 22 in a sliding manner. The guide plate 232 is fixedly installed inside the wind blocking cylinder 231 in a welding manner. The guide plate 232 is triangular. The baffle 234 is fixedly installed on the upper end of the wind blocking cylinder 231 in a hinged manner. The baffle 234 and the wind blocking cylinder 231 form an angle of 45°. The baffle 234 is provided with a triangular groove below. The rectangular groove 235 is formed on the expansion chamber 22. The fixed column 236 is fixedly installed on the rectangular groove 235. The baffle 234 is fixedly installed on the fixed column 236 in a hinged manner. One end of the limiting spring 237 is fixedly installed on the baffle 234, and the other end is fixedly installed on the expansion chamber 22 in a welding manner.

[0055] When the exhaust gas is discharged through the muffler body 1, the guide plate 232 is triangular, which is mainly used when the exhaust gas is discharged through the guide plate 232. The guide plate 232 can disperse the exhaust gas and has a buffering effect on the airflow. The angle between the baffle 234 and the wind blocking cylinder 231 is 45°, which can be tilted faster when the wind speed is fast during driving, so as to discharge the internal exhaust gas. At the same time, the external wind can help to gather the center of the wind blocking assembly 23, so as to better achieve the silencing effect. The baffle 234 is provided with a triangular groove below, which can shunt the exhaust gas discharge and achieve a better silencing effect. The limiting spring 237 is mainly used to pull back the baffle 234 when the motorcycle stops, and can also protect the baffle 234, reduce the bearing pressure of the baffle 234, and save costs.

[0056] As Figure 7As shown, the double-layer funnel 24 includes a conical funnel 241, a conical hole 242, a wind flow funnel 243, and a wind flow hole 244. The conical funnel 241 is fixedly installed at the center of the expansion chamber 22, and is connected to the expansion chamber 22 by welding. The height of the conical funnel 241 is half the height of the expansion chamber 22, and the diameter of the conical funnel 241 is 4 / 5 of the diameter of the expansion chamber 22. The conical hole 242 is formed in the conical funnel 241. The wind flow funnel 243 is fixedly installed at the middle of the conical funnel 241, and is connected to the conical funnel 241 by welding. The diameter of the wind flow funnel 243 is 1 / 2 of the diameter of the conical funnel 241. The wind flow hole 244 is formed in the wind flow funnel 243.

[0057] When the air flow passes through the expansion chamber 221, it can effectively guide the air flow from the expansion chamber 221 into the double-layer funnel 24. The height of the conical funnel 241 is half the height of the expansion chamber 22, and the diameter of the conical funnel 241 is 4 / 5 of the diameter of the expansion chamber 221. This allows the air flow to better gather and diffuse when entering the double-layer funnel 24 system, improving the efficiency of the exhaust. The wind flow funnel 243 is fixedly installed at the middle of the conical funnel 241, which helps to balance the distribution and flow rate of the air flow, making the air flow more uniform and stable inside the double-layer funnel 24. The wind flow hole 244 on the wind flow funnel 243 allows the air flow to smoothly exit the double-layer funnel 24 system. This design ensures smooth air flow and effective exhaust.

[0058] As shown in Figure 3 The wind baffle 25 is made of aluminum alloy material, and the angle between the wind baffle 25 and the expansion chamber 22, the conical funnel 241, and the wind flow funnel 243 is inclined inward by 15°.

[0059] The use of aluminum alloy material for the wind baffle 25 can achieve lightweight structure and excellent corrosion resistance. Aluminum alloy has high strength and good oxidation resistance, making it suitable for use in high temperature and humidity conditions. At the same time, the weight of the overall device is reduced. The inward inclination angle between the wind baffle 25 and the expansion chamber 22, the conical funnel 241, and the wind flow funnel 243 is 15°, which helps to guide the air flow inward and increase the flow rate and pressure of the air flow, improving the noise reduction effect and increasing the exhaust performance of the system. The presence of the wind baffle 25 can provide additional structural support, enhancing the stability and durability of the entire silencer. The inclined angle and close connection of the wind baffle 25 with other components can reduce vibration and displacement, ensuring the reliability and long service life of the system during operation.

[0060] As shown in Figure 9 and Figure 11As shown, the heat insulation mechanism 3 includes a heat insulation plate 31, a heat insulation spring 32 and a spring plate 33. One end of the heat insulation plate 31 is fixedly mounted on the partition groove 211, and the installation method is welding connection. The other end of the heat insulation plate 31 is fixedly mounted on the muffler body 1, and the installation method is sliding connection. The diameter ratio of the heat insulation plate 31 to the muffler body 1 is 6:5. The heat insulation spring 32 is fixedly mounted on the lower end of the heat insulation plate 31, and the installation method is welding connection. The heat insulation spring 32 is dispersed at the lower end of the heat insulation plate 31. The spring plate 33 is fixedly mounted below the heat insulation spring 32. The spring plate 33 and the heat insulation spring 32 are installed in a hinged connection. One end of the spring plate 33 is inclined 150°, and the spring hole 34 is opened on the spring plate 33.

[0061] When the motorcycle is started, the heat insulation plate 31 can effectively reduce the high-temperature combustion gas in the engine exhaust process and the heat generated by the internal working process of the muffler, thereby achieving a good heat insulation effect. The diameter ratio of the heat insulation plate 31 to the muffler body 1 is 6:5, which helps to provide a suitable coverage area and heat insulation performance. It is dispersedly arranged under the entire heat insulation plate 31, and can effectively reduce heat conduction and heat radiation, preventing heat from being transferred to the muffler body 1, thereby further improving the heat insulation effect. The spring plate 33 is fixed under the heat insulation spring 32, and one end is tilted 150° to help balance the compression force of the spring and the support for the heat insulation spring 32. It can also be installed better during the installation process, reducing wear on parts, thereby increasing the service life of parts. The opening of the spring hole 34 helps to discharge heat. The 150° tilt of the spring plate 33 can allow outside wind to blow in during driving, achieving a better cooling effect.

[0062] like Figure 10 As shown, the exhaust mechanism 4 includes a fixing plate 41, a fixing groove 42 and a fixing hole 43. The fixing plate 41 is fixedly installed on the outer end of the noise reduction mechanism 2. The fixing groove 42 and the fixing hole 43 are provided on the fixing plate 41. The diameter of the fixing groove 42 is the same as the diameter formed by the wind blocking plate 25. The fixing groove 42 is recessed 2 cm inwardly. The fixing hole 43 is fixedly installed at the center position of the fixing plate 41. The diameter of the fixing hole 43 is the same as the larger diameter of the airflow funnel 243.

[0063] The exhaust mechanism 4 provides reliable support and fixation, so that the exhaust mechanism 4 can withstand the airflow and pressure of the engine exhaust, helps to reduce the resistance of the airflow through the exhaust mechanism 4, the diameter of the fixed groove 42 is the same as the diameter formed by the baffle 25, which ensures the smooth flow of the airflow during the exhaust process, the inward recess of 2cm can change the flow trajectory of the airflow, further reducing the resistance of the airflow and improving the exhaust efficiency, the diameter of the fixed hole 43 is the same as the larger diameter in the air flow funnel 243, which ensures the smooth passage of the airflow, and the existence of the fixed hole 43 helps to maintain the balance and stability of the airflow, avoiding uneven distribution of the airflow and fluctuation of the pressure.

[0064] In the working process of the application, when the motorcycle starts, the exhaust gas of the motorcycle passes through the muffler, and the internal mechanism of the muffler controls and restricts the airflow, thereby reducing the noise, and the work done by the motorcycle engine is on the structure inside the muffler, which makes the temperature of the muffler rise, and the design of the heat insulation mechanism 3 can isolate the temperature of the muffler, reduce the damage caused by people's carelessness when getting on the motorcycle, and the airflow passes through the muffler to the expansion chamber 221 in the noise reduction mechanism 2, the expansion chamber 221 first expands the gas to reduce the flow rate of the gas, and the airflow first passes through the air resistance assembly 23, the air resistance cylinder 231 inside the air resistance assembly 23 disperses the wind, part of which enters the guide plate 232, the guide plate 232 disperses and slows down the airflow, part of which is discharged through the rectangular groove 235, and the remaining airflow enters the double-layer funnel 24, and the gap reduces the flow rate of the gas, thereby reducing the noise, and finally the gas passes through the baffle to slow down and restrict the flow rate of the gas, thereby reducing the flow rate of the gas. The gas passing through the noise reduction mechanism 2 will enter the exhaust mechanism 4, first reaching the fixed groove 42, which can reduce the resistance of the airflow through the exhaust mechanism 4, reduce the resistance of the airflow, and improve the exhaust efficiency.

[0065] Although the beneficial effects of the present application have been described in detail and examples have been provided in the specification, for those skilled in the art, various changes, modifications, replacements and variations can be made to the examples without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A motorcycle noise reduction muffler, comprising a muffler body (1), a noise reduction mechanism (2), a heat insulation mechanism (3) and an exhaust mechanism (4), characterized in that: The muffler body (1) tail end fixed mounting the noise reduction mechanism (2), the noise reduction mechanism (2) through the porous structure absorbs the sound wave that the muffler body (1) emits, simultaneously according to the speed adjustment sound reduction degree;The heat insulation mechanism (3) is above the muffler body (1), the heat insulation mechanism (3) through the distance from motorcycle exhaust cylinder according to temperature self-adapting adjustment;The exhaust mechanism (4) is fixedly installed in one end of the noise reduction mechanism (2), the exhaust mechanism (4) is dispersed the gas flow in the noise reduction mechanism (2), and the noise emitted by motorcycle driving is absorbed by the turbulence and the noise reduction mechanism (2) cooperation; The noise reduction mechanism (2) includes movable assembly (21), expansion chamber (22), wind resistance component (23), double-layer funnel (24) and wind resistance plate (25), the movable assembly (21) is fixedly installed in the tail end position of the muffler body (1), the length of the movable assembly (21) is 3-6cm, the expansion chamber (22) is fixedly installed above the movable assembly (21), the diameter ratio of the expansion chamber (22) and the diameter of the muffler body (1) is 6:5, six wind resistance components (23) are fixedly installed in the left side position of the expansion chamber (22), the height of the wind resistance component (23) is 1 / 2 of the high length of the expansion chamber (22), the double-layer funnel (24) is fixedly installed in the right side position of the expansion chamber (22), the other end is fixedly installed on the wind resistance plate (25), the wind resistance plate (25) adopts circular ring structure and surrounds the expansion chamber (22); The wind resistance component (23) includes wind resistance cylinder (231), guide plate (232), guide hole (233), baffle (234), rectangular groove (235), fixed column (236) and limit spring (237), the wind resistance cylinder (231) is fixedly installed in the expansion chamber (22), the guide plate (232) is fixedly installed in the wind resistance cylinder (231), the shape of the guide plate (232) is triangular, the baffle (234) is fixedly installed on the upper end of the wind resistance cylinder (231), the included angle between the baffle (234) and the wind resistance cylinder (231) is 45°, there is a triangular groove below the baffle (234), the rectangular groove (235) is arranged on the expansion chamber (22), the fixed column (236) is fixedly installed on the rectangular groove (235), the center of the baffle (234) is fixedly installed with the fixed column (236) in the position of deflection, one end of the limit spring (237) is fixedly installed on the baffle (234), the other end is fixedly installed on the expansion chamber (22).

2. A motorcycle noise reducing muffler as defined in claim 1 wherein: The activity component (21) includes the baffle groove (211) and the expansion spring (212), the baffle groove (211) is fixedly installed above the tail end of the muffler body (1), the baffle groove (211) is composed of four groove cylinders, the baffle groove (211) is made of carbon steel, the expansion spring (212) is fixedly installed on the baffle groove (211), and the other end of the four expansion springs (212) is fixedly installed on one end of the expansion chamber (22).

3. A motorcycle noise reducing muffler as defined in claim 1 wherein: The expansion chamber (22) adopts a circular arc shape, the expansion chamber (22) is divided into two parts by the bending place, one part is the expansion room (221) which is mainly provided with a double-layer funnel (24), and the other part is the air flow room (222) which is mainly provided with three layers of cylinders (223).

4. A motorcycle noise reducing silencer as claimed in claim 3 wherein: The double-layer funnel (24) includes a conical funnel (241), a conical hole (242), an air flow funnel (243) and an air flow hole (244), the conical funnel (241) is fixedly installed at the center position of the expansion room (221), the height of the conical funnel (241) is 1 / 2 of the height of the expansion chamber (22), the diameter of the conical funnel (241) is 4 / 5 of the diameter of the expansion room (221), the conical hole (242) is formed in the conical funnel (241), the air flow funnel (243) is fixedly installed at the middle position of the conical funnel (241), the diameter of the air flow funnel (243) is half of the diameter of the conical funnel (241), and the air flow hole (244) is formed in the air flow funnel (243).

5. A motorcycle noise reducing muffler as defined in claim 1 wherein: The air resistance plate (25) is made of aluminum alloy material, and the angle between the air resistance plate (25) and the expansion chamber (22), the conical funnel (241) and the air flow funnel (243) is inclined inward by 15°.

6. A motorcycle noise reducing muffler as defined in claim 2 wherein: The heat insulation mechanism (3) includes a heat insulation plate (31), a heat insulation spring (32) and a spring plate (33), one end of the heat insulation plate (31) is fixedly installed on the baffle groove (211), the other end of the heat insulation plate (31) is fixedly installed on the muffler body (1), the diameter ratio of the heat insulation plate (31) to the muffler body (1) is 6:5, the heat insulation spring (32) is fixedly installed at the lower end of the heat insulation plate (31), the heat insulation spring (32) is dispersed at the lower end of the heat insulation plate (31), and the spring plate (33) is fixedly installed below the heat insulation spring (32), and one end of the spring plate (33) is outwardly inclined by 150°.

7. A motorcycle noise reducing muffler as defined in claim 4 wherein: The exhaust mechanism (4) includes a fixed plate (41), a fixed groove (42) and a fixed hole (43), the fixed plate (41) is fixedly installed at the outer end of the noise reduction mechanism (2), the fixed groove (42) and the fixed hole (43) are formed on the fixed plate (41), the diameter of the fixed groove (42) is the same as the diameter formed by the air resistance plate (25), the fixed groove (42) is recessed inward by 2cm, the fixed hole (43) is fixedly installed at the center position of the fixed plate (41), and the diameter of the fixed hole (43) is the same as the larger diameter in the air flow funnel (243).

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