Novel motorcycle silencer

Abstract

The utility model discloses a novel motorcycle silencer which comprises a cylinder body and an air inlet pipe, and a first partition plate, a second partition plate and a third partition plate are arranged in the cylinder body. The inner cavity of the barrel is divided into a front chamber, a middle chamber and a rear chamber by the first partition plate, the second partition plate and the third partition plate; a first noise reduction assembly composed of an arc cover body and an inner pipe is arranged in the front cavity, the inner pipe is located between the arc cover body and the barrel, one end of the inner pipe is connected with the first partition plate, the other end of the inner pipe is connected with the outer side of a cover opening of the arc cover body, and a first front cavity is formed among the barrel, the arc cover body and the inner pipe. A second front cavity is formed among the inner pipe, the arc cover body and the first partition plate, and a through hole communicated with the middle cavity is formed in the position, located between the inner pipe and the barrel, of the first partition plate; the air inlet pipe is arranged in the front cavity, and a front silencing hole is formed in the position, located in the arc cover body, of the air inlet pipe. The noise reduction device is simple in structure and reasonable in design, eliminates low-frequency noise, and effectively reduces the noise.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle mufflers, in particular to a novel motorcycle muffler. Background Art

[0002] In addition to the requirements for the power and economy of motorcycles, people also have higher and higher requirements for the noise reduction of mufflers. In the prior art, in order to solve the airflow noise, tail pipe standing wave and other noises of the muffler, silencer cotton is usually added to the muffler cavity, and countless porous gaps are formed in and between the silencer cottons. When the sound waves entering the cavity are transmitted to these gaps, they continuously rub against the air in the gaps, causing the sound waves to continuously attenuate, thereby achieving the purpose of reducing noise. In the process, the higher the frequency of the sound waves, the more intense the particle vibration, and the more severe the sound wave attenuation.

[0003] However, when the silencer is small in size, the silencing effect on medium and high frequency sound waves is generally relatively good, but the silencing effect on low frequency noise does not meet the requirements.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a new type of motorcycle muffler with simple structure and reasonable design, which can not only eliminate low-frequency noise but also effectively reduce noise. Utility Model Content

[0005] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A novel motorcycle muffler comprises a cylinder and an air intake pipe, characterized in that a first partition, a second partition and a third partition are sequentially arranged inside the cylinder from the air intake to the air exhaust direction; the first partition, the second partition and the third partition divide the inner cavity of the cylinder into a front chamber, a middle chamber and a rear chamber which are independent of each other;

[0007] The front chamber is provided with a first noise reduction component for eliminating low-frequency noise, the first noise reduction component comprises a coaxially arranged arc cover body and an inner tube, the cover opening of the arc cover body faces the air inlet end, the inner tube is located between the arc cover body and the cylinder, one end of the inner tube is connected to the first baffle, and the other end is connected to the outer side of the cover opening of the arc cover body, a first front chamber is formed between the cylinder, the arc cover body and the inner tube, a second front chamber is formed between the inner tube, the arc cover body and the first baffle, and a through hole is opened on the first baffle between the inner tube and the cylinder to connect the first front chamber with the middle chamber;

[0008] The air inlet pipe is arranged in the front chamber, the air inlet end of the air inlet pipe passes through the cylinder to the outside, and the air outlet end passes through the arc cover, the first partition and the second partition in sequence and then extends to the rear chamber. The air inlet pipe is provided with a front silencer hole at a position inside the arc cover.

[0009] Preferably, a plurality of through holes are provided, which are distributed in a circle with the axis of the first partition as the center.

[0010] Preferably, it also includes a second noise reduction component arranged in the middle chamber, the second noise reduction component includes a first silencer body and a second silencer body which are not coaxial with the air intake pipe, one end of the first silencer body passes through the first partition and extends to the second front chamber, one end of the second silencer body passes through the second partition and extends to the rear chamber, and the other end passes through the first partition and extends to the second front chamber, and a middle silencer hole is opened at the position of the air intake pipe located in the middle chamber.

[0011] Preferably, it also includes a third noise reduction component arranged in the rear chamber, the third noise reduction component includes a plurality of exhaust pipes, the exhaust ends of the exhaust pipes extend to the outside of the cylinder after passing through the third partition plate, a resistive tank is arranged on the outside of the air inlet end, and a resistive sound-absorbing material is built in the resistive tank.

[0012] Preferably, the plurality of exhaust pipes are not coaxially arranged with the air intake pipe, and the air intake pipe is provided with a rear silencer hole at a position located in the rear chamber.

[0013] Preferably, the inner wall surface of the cylinder is provided with sound-absorbing cotton.

[0014] Preferably, the front silencer holes are provided in plurality and are distributed in a circle with the axis of the air intake pipe as the center.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In the traditional muffler structure, the utility model forms a first front chamber between the cylinder, the arc cover and the inner tube by setting the first noise reduction component. A part of the gas entering the intake pipe enters the first front chamber (resonance tube) through the front muffler hole, and the standing wave is interrupted by forming an isolated cavity airflow, thereby eliminating low-frequency noise.

[0017] 2. Through the combination of the first noise reduction component, the second noise reduction component and the third noise reduction component, not only the low-frequency noise is eliminated, but also the noise is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the hidden cylinder in the utility model;

[0020] Among them: cylinder 1, air intake pipe 2, first noise reduction component 3, second noise reduction component 4, third noise reduction component 5, arc cover 31, inner tube 32, first silencer tube body 41, second silencer tube body 42, exhaust pipe 51, resistive tank 52, first baffle 10, second baffle 20, third baffle 30, front chamber 100, first front chamber 101, second front chamber 102, middle chamber 200, rear chamber 300, front silencer hole 2a, middle silencer hole 2b, rear silencer hole 2c, through hole 10a. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0025] like Figure 1-2 As shown, a novel motorcycle muffler comprises a cylinder 1 and an intake pipe 2, wherein the cylinder 1 is provided with a first partition 10, a second partition 20 and a third partition 30 in sequence from the intake direction to the exhaust direction; the first partition 10, the second partition 20 and the third partition 30 divide the inner cavity of the cylinder 1 into a front chamber 100, a middle chamber 200 and a rear chamber 300 which are independent of each other;

[0026] The front chamber 100 is provided with a first noise reduction component 3 for eliminating low-frequency noise, the first noise reduction component 3 includes a coaxially arranged arc cover body 31 and an inner tube 32, the cover opening of the arc cover body 31 faces the air inlet end, the inner tube 32 is located between the arc cover body 31 and the cylinder 1, one end of the inner tube 32 is connected to the first baffle 10, and the other end is connected to the outer side of the cover opening of the arc cover body 31, a first front chamber 101 is formed between the cylinder 1 and the arc cover body 31 and the inner tube 32, a second front chamber 102 is formed between the inner tube 32 and the arc cover body 31 and the first baffle 10, and the first baffle 10 is provided with a through hole 10a that connects the first front chamber 101 with the middle chamber 200 at a position between the inner tube 32 and the cylinder 1;

[0027] The air intake pipe 2 is arranged in the front chamber 100, the air intake end of the air intake pipe 2 passes through the cylinder 1 to the outside, and the air exhaust end passes through the arc cover 31, the first partition 10 and the second partition 20 in sequence and then extends to the rear chamber 300. The air intake pipe 2 is located in the arc cover 31 and is provided with a front silencer hole 2a.

[0028] In this embodiment, since the air intake pipe 2 is long and the standing wave frequency is relatively low, in order to solve this type of low-frequency standing wave problem, the first noise reduction component 3 is provided to form a first front chamber 101 between the cylinder 1, the arc cover 31 and the inner tube 32. The first front chamber 101 is formed by a combination of an arc channel and an annular channel. A portion of the gas entering the air intake pipe 2 enters the first front chamber 101 (resonance tube) through the front silencer hole 2a, and the standing wave is interrupted by forming an isolated cavity airflow, thereby eliminating low-frequency noise.

[0029] Working principle: the air intake end of the air intake pipe 2 is connected to the engine of the motorcycle. When the gas of the engine enters the front end of the air intake pipe 2, a part of the gas enters the first front chamber 101 through the front silencer hole 2a, and after being reflected in the arc channel of the first front chamber 101, it enters the annular channel in the reverse direction with the airflow for reflection and enters the middle chamber 200 through the through hole 10a. In the process, the standing wave is interrupted by the blocked cavity airflow, and the low-frequency sound wave transmission process is continuously lost, so as to effectively eliminate the low-frequency noise.

[0030] In addition, the remaining gas passes through the middle section and the rear section of the intake pipe 2, and the noise reduction components on the middle chamber 200, the rear chamber 300 and the exhaust pipe 51 to eliminate medium and high frequency noise.

[0031] In this embodiment, by adopting the arc cover body 31, compared with a straight tube body, low-frequency sound waves will not be reflected back into the intake pipe 2, thereby improving the effect of reducing low-frequency noise.

[0032] Further, such as Figure 1-2As shown, in order to increase the transmission loss of sound waves in the airflow, the through holes 10a are provided in plurality and are distributed in a circle with the axis of the first partition plate 10 as the center; the transmission loss of sound waves is increased by blocking the transmission of sound waves in the non-through holes 10a.

[0033] Further, such as Figure 1 , 2 As shown, it also includes a second noise reduction component 4 arranged in the middle chamber 200, and the second noise reduction component 4 includes a first silencer body 41 and a second silencer body 42 which are not coaxial with the intake pipe 2, one end of the first silencer body 41 passes through the first partition 10 and extends to the second front chamber 102, one end of the second silencer body 42 passes through the second partition 20 and extends to the rear chamber 300, and the other end passes through the first partition 10 and extends to the second front chamber 102, and the intake pipe 2 is located in the middle chamber 200 and is provided with a middle silencer hole 2b.

[0034] In this embodiment, the low-frequency noise of the airflow in the middle section of the intake pipe 2 can be effectively eliminated by setting the middle silencer hole 2b, and the acoustic impedance can be changed by utilizing the change in the cross-sectional area of ​​the first silencer tube body 41 and the second silencer tube body 42 to improve the sound transmission loss; at the same time, the noise passing frequency can be eliminated, the silencer frequency can be broadened, and the noise elimination effect can be improved.

[0035] In this embodiment, the gas after the low-frequency noise is eliminated enters the middle chamber 200 and mixes with another part of the gas entering the middle chamber 200 through the middle silencer hole 2b in the middle section of the intake pipe 2. The mixed gas passes through the first silencer tube body 41 to filter out some frequency noise, and then passes through the second silencer tube body 42 to continue filtering out some frequency noise before entering the rear chamber 300, thereby effectively eliminating the noise in the middle section of the intake pipe 2.

[0036] Further, such as Figure 1 , 2 As shown, in order to eliminate high-frequency noise discharged from the exhaust pipe 51, a third noise reduction component 5 is also included in the rear chamber 300, and the third noise reduction component 5 includes a plurality of exhaust pipes 51. The exhaust ends of the exhaust pipes 51 extend to the outside of the cylinder 1 after passing through the third partition plate 30, and a resistive tank 52 is provided on the outside of the air inlet end, and the resistive tank 52 has a resistive sound-absorbing material (not marked in the figure) built in.

[0037] Further, such as Figure 1 , 2 As shown, in order to eliminate the noise passing frequency, broaden the silencing frequency, and improve the noise elimination effect, the multiple exhaust pipes 51 are not coaxially arranged with the intake pipe 2, and the intake pipe 2 is provided with a rear silencing hole 2c at the position of the rear chamber 300.

[0038] In this embodiment, the low-frequency noise of the airflow at the rear section of the air intake pipe 2 can be effectively eliminated by setting the rear silencer hole 2c.

[0039] Furthermore, in order to effectively eliminate high-frequency noise in each chamber, the inner wall surface of the cylinder 1 is provided with sound-absorbing cotton (not shown in the figure).

[0040] Further, such as Figure 1 , 2 As shown, in order to allow more low-frequency noise to enter the first front chamber 101 and improve the effect of eliminating low-frequency noise, the front silencer holes 2a are provided with a plurality of them, which are distributed in a circle with the axis of the intake pipe 2 as the center.

[0041] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A new type of motorcycle muffler, comprising a cylinder and an air intake pipe, characterized in that: The interior of the cylinder is provided with a first partition, a second partition and a third partition in sequence from the air intake to the air exhaust direction; the first partition, the second partition and the third partition divide the inner cavity of the cylinder into a front chamber, a middle chamber and a rear chamber which are independent of each other; The front chamber is provided with a first noise reduction component for eliminating low-frequency noise, the first noise reduction component comprises a coaxially arranged arc cover body and an inner tube, the cover opening of the arc cover body faces the air inlet end, the inner tube is located between the arc cover body and the cylinder, one end of the inner tube is connected to the first baffle, and the other end is connected to the outer side of the cover opening of the arc cover body, a first front chamber is formed between the cylinder, the arc cover body and the inner tube, a second front chamber is formed between the inner tube, the arc cover body and the first baffle, and a through hole is opened on the first baffle between the inner tube and the cylinder to connect the first front chamber with the middle chamber; The air inlet pipe is arranged in the front chamber, the air inlet end of the air inlet pipe passes through the cylinder to the outside, and the air outlet end passes through the arc cover, the first partition and the second partition in sequence and then extends to the rear chamber. The air inlet pipe is provided with a front silencer hole at a position inside the arc cover.

2. A new type of motorcycle muffler according to claim 1, characterized in that: The through holes are provided in plurality and are distributed in a circle with the axis of the first partition plate as the center.

3. A new type of motorcycle muffler according to claim 1, characterized in that: It also includes a second noise reduction component arranged in the middle chamber, the second noise reduction component includes a first silencer body and a second silencer body which are not coaxial with the air intake pipe, one end of the first silencer body passes through the first partition and extends to the second front chamber, one end of the second silencer body passes through the second partition and extends to the rear chamber, and the other end passes through the first partition and extends to the second front chamber, and a middle silencer hole is opened at the position of the air intake pipe located in the middle chamber.

4. A new type of motorcycle muffler according to claim 1, characterized in that: It also includes a third noise reduction component arranged in the rear chamber, the third noise reduction component includes a plurality of exhaust pipes, the exhaust ends of the exhaust pipes extend to the outside of the cylinder after passing through the third partition plate, a resistive tank is arranged on the outside of the air inlet end, and a resistive sound-absorbing material is built in the resistive tank.

5. A new type of motorcycle muffler according to claim 4, characterized in that: The plurality of exhaust pipes are not coaxially arranged with the air intake pipe, and a rear muffler hole is provided at a position of the air intake pipe located in the rear chamber.

6. A novel motorcycle muffler according to claim 1, characterized in that: The inner wall surface of the cylinder is provided with sound-absorbing cotton.

7. A novel motorcycle muffler according to claim 1, characterized in that: The front muffler holes are provided in a plurality and are distributed in a circle with the axis of the air intake pipe as the center.

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