Silencer and motorcycle

Abstract

The utility model discloses a silencer and a motorcycle, which comprise a silencer cylinder body, an inner cylinder arranged in the cylinder body, a silencing chamber formed in the inner cylinder, a partition plate arranged in the silencing chamber and used for dividing the silencing chamber into a front chamber and a rear chamber, exhaust gas of an engine enters the front chamber through an input pipe, and the exhaust gas enters the rear chamber through an output pipe. A communicating pipe is arranged between the front cavity and the rear cavity, and the casing pipe with the hole is supported in the rear cavity through a supporting plate and connected to the exhaust tail pipe. According to the silencer and the motorcycle, a two-cavity loop is adopted for conducting noise reduction treatment and sound frequency adjustment on exhaust sound of an engine, the proportion of medium-high frequency exhaust noise can be reduced, the sound purity can be improved, and order frequency sound can be highlighted.

Description

Technical Field

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

[0002] During motorcycle riding, the user's perception mainly comes from control, power, and sound. Customizing a suitable muffler for a motorcycle can not only achieve a strong power output, but also emit a surging exhaust sound, which can enhance the user's riding experience after matching the power. However, due to the high exhaust temperature of motorcycle engine exhaust, in order to reduce the impact of high temperature and corrosive gases, a resistant muffler is generally used. A single resistant muffler has a good muffler effect on low-frequency and medium-frequency noise, but a poor muffler effect on high-frequency noise.

[0003] Therefore, there is an urgent need to develop a muffler and a motorcycle that can modulate the sound emitted by the engine, while ensuring a good attenuation effect on low-frequency noise, while controlling mid- and high-frequency noise, thereby improving sound purity and highlighting order frequency sounds. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a muffler and a motorcycle, which can modulate the sound discharged by the engine, while ensuring a good attenuation effect on low-frequency noise, and at the same time can control medium and high-frequency noise, thereby improving the purity of the sound and highlighting the order frequency sound.

[0005] The utility model discloses a muffler, comprising a muffler cylinder, an inner cylinder is arranged in the cylinder, a muffler chamber is formed on the inner cylinder, a partition is arranged in the muffler chamber to separate the muffler chamber into a front chamber and a rear chamber, the exhaust gas of the engine enters the front chamber through an input pipe, a connecting pipe is arranged between the front chamber and the rear chamber, a sleeve with holes is supported in the rear chamber through a supporting plate and connected to the exhaust tail pipe; the design of two chambers can simplify the airflow loop, shorten the airflow and sound propagation path, retain the original exhaust order sound of the engine to a large extent, and avoid excessive attenuation of medium and low frequency sound while reducing the sound pressure level, so as to ensure rich output order and thick exhaust sound, and at the same time improve the muffler effect on medium and low frequency noise and high frequency noise.

[0006] Furthermore, the perforated sleeve comprises a sleeve and an inner tube, the inner tube is provided with a plurality of first through holes, and a sound absorbing material is arranged between the inner tube and the sleeve;

[0007] The length of the sleeve is smaller than that of the inner tube, and the length of the sleeve is consistent with the length of the multiple first through holes distributed in the inner tube; the first through holes and the silencer chamber form an elastic resonance system, and the length and size of the first through holes are designed at the same time, which can improve the silencer effect on noise of a set frequency.

[0008] Furthermore, the support plate is provided with a plurality of connecting holes; a plurality of connecting holes are provided on the support plate to form a large-area through hole, which can ensure the circulation of airflow in the rear chamber.

[0009] Furthermore, the front chamber is provided with a perforated plate, the perforated plate is provided with a plurality of second through holes, and the input pipe passes through the perforated plate into the front chamber; providing a perforated plate instead of a pipeline structure can improve the silencing effect on low-frequency noise.

[0010] Furthermore, a plurality of third through holes are provided on the side wall of the muffler inner cylinder, and sound-absorbing material is provided between the muffler inner cylinder and the muffler body; the muffler shell adopts a double-layer structure, and sound-absorbing material is provided between the muffler inner cylinder and the muffler body, which can improve the attenuation effect of set frequency noise.

[0011] Furthermore, the length of the input tube extending into the front chamber ranges from 4 to 6 cm;

[0012] The length of the connecting pipe extending into the front chamber is in the range of 3 to 4 cm, and the length of the connecting pipe extending into the rear chamber is in the range of 2 to 3 cm.

[0013] Furthermore, the length of the perforated sleeve located in the rear chamber ranges from 2 to 3 cm.

[0014] Furthermore, the diameter ratio of the input pipe to the exhaust pipe of the engine is 0.9-1.5; the diameter ratio of the exhaust tail pipe to the sleeve is 0.5-0.8.

[0015] Furthermore, the diameter ratio of the sleeve and the inner tube is 1.2 to 1.6.

[0016] The utility model discloses a motorcycle, comprising the muffler.

[0017] The beneficial effects of the utility model: the muffler and motorcycle of the utility model can modulate the sound discharged by the engine, and at the same time ensure a good attenuation effect on the low-frequency noise, through the sudden change of the cross-section between the perforated sleeve, the connecting pipe and the input pipe and the muffler chamber, the low-frequency and medium-frequency noise can be muffled, and at the same time, the muffler hole arranged on the perforated sleeve is connected with the muffler chamber to achieve the purpose of muffler of high-frequency noise, so that the medium and high-frequency noise can be controlled, thereby improving the purity of the sound and highlighting the order frequency sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] The above drawings contain the following reference numerals:

[0021] 1. Exhaust pipe; 2. Muffler cylinder; 201. Inner cylinder; 3. Inlet pipe; 4. Partition plate; 5. Connecting pipe; 6. Support plate; 7. Perforated sleeve; 8. First through hole; 9. Third through hole; 10. Exhaust tail pipe; 11. Perforated plate. DETAILED DESCRIPTION

[0022] Figure 1 It is a schematic diagram of the structure of the utility model, such as Figure 1 As shown: a muffler of the present embodiment comprises a muffler barrel 2, an inner barrel 201 is arranged inside the barrel, the inner barrel 201 forms a muffler chamber, a partition plate 4 is arranged inside the muffler chamber to separate the muffler chamber into a front chamber and a rear chamber, the exhaust gas of the engine enters the front chamber through an input pipe 3, a connecting pipe 5 is arranged between the front chamber and the rear chamber, a perforated sleeve 7 is supported on the rear chamber through a supporting plate 6 and connected to the exhaust tail pipe 10; in this structure, the front chamber and the rear chamber are only used to distinguish the two chambers, the front chamber is the chamber close to the exhaust pipe of the engine, and the muffler chamber is divided into the front chamber and the rear chamber, which can reduce the noise and sound of the exhaust sound of the engine. The audio frequency regulation adopts a two-chamber design, which can simplify the airflow circuit, shorten the airflow and sound propagation path, retain the original exhaust order sound of the engine to a large extent, and avoid excessive attenuation of medium and low frequency sounds while reducing the sound pressure level, thereby ensuring rich output orders and thick exhaust sounds. The support plate 6 is designed with a large opening area, which supports the perforated sleeve 7 while ensuring the circulation of airflow. At the same time, the variable cross-section design between the perforated sleeve 7, the connecting pipe 5 and the input pipe 3 and the silencer chamber can achieve silencing of low and medium frequency noises, and a silencer hole is provided on the perforated sleeve 7, which is connected to the rear chamber to achieve the purpose of silencing high frequency noises. The overall structure is simple, which can save production costs.

[0023] In the prior art, since the exhaust temperature of motorcycle engines is relatively high, in order to reduce the influence of high temperature and corrosive gases, a resistive muffler is generally used. A single resistive muffler has a good muffler effect on low-frequency and medium-frequency noises, but a poor muffler effect on high-frequency noises. The utility model provides a muffler and a motorcycle, which can modulate the sound discharged by the engine, and while ensuring a good attenuation effect on low-frequency noises, achieve muffler of low-frequency and medium-frequency noises by changing the cross-section between the perforated sleeve, the connecting pipe, the input pipe and the muffler chamber, and at the same time, the muffler is connected to the muffler chamber through the muffler hole arranged on the perforated sleeve, so as to achieve the purpose of muffler of high-frequency noises, thereby controlling medium and high-frequency noises, thereby improving the purity of the sound and highlighting the order frequency sound.

[0024] In this embodiment, the perforated sleeve 7 includes a sleeve and an inner tube, the inner tube is provided with a plurality of first through holes 8, and a sound absorbing material is arranged between the inner tube and the sleeve; the first through holes 8 are multiple groups, one group of first through holes 8 is distributed along the circumference of the inner tube, and multiple groups of first through holes 8 are arranged at intervals along the length direction of the inner tube, and an elastic resonance system is formed between the first through holes 8 and the silencing chamber, and the purpose of silencing the set frequency noise can be achieved by setting the size of the first through holes 8 and the distribution length in the inner tube, and the purity of the sound can be adjusted by designing the sound absorbing material and the distribution length of the first through holes 8, and the sound absorbing material can be a material such as silencing cotton;

[0025] The length of the sleeve is smaller than that of the inner tube, and is consistent with the length of the plurality of first through holes 8 distributed in the inner tube; the length of the sleeve is consistent with the length of each first through hole 8, so as to improve the sound-absorbing effect.

[0026] In this embodiment, a plurality of connecting holes are provided on the support plate 6; a plurality of connecting holes (not shown in the figure) are provided on the support plate 6, and the connecting holes are provided with large-area openings to ensure the circulation of airflow in the rear chamber.

[0027] In this embodiment, the front chamber is provided with a perforated plate 11, and a plurality of second through holes are provided on the perforated plate 11. The input pipe 3 passes through the perforated plate 11 to enter the front chamber; the perforated plate 11 is located at the end of the front chamber (one end close to the engine exhaust pipe 1), and the input pipe 3 passes through the perforated plate 11 to enter the front chamber, and the other end of the input pipe 3 is connected to the exhaust pipe 1 of the engine. The perforated plate 11 is used instead of the exhaust pipe 1 to increase the output proportion of medium and low frequency exhaust sounds.

[0028] In this embodiment, a plurality of third through holes 9 are provided on the side wall of the muffler inner cylinder 201, and a sound-absorbing material is provided between the muffler inner cylinder 201 and the muffler cylinder body 2; the shell of the muffler adopts a double-layer structure, and a sound-absorbing material is provided between the muffler inner cylinder 201 and the muffler cylinder body 2. The sound-absorbing material may be a sound-absorbing cotton, etc., to form an impedance composite muffler, which reduces the airflow impact noise and the friction noise between the airflow and the wall, avoids the influence of the regenerative noise on the exhaust sound, and is beneficial to reduce the proportion of medium and high frequency exhaust noise, improve the sound purity, and highlight the order frequency sound.

[0029] In this embodiment, the length of the input pipe 3 extending into the front chamber is in the range of 4 to 6 cm. By controlling the length of the input pipe 3 extending into the front chamber, the low-frequency sound of the exhaust noise can be attenuated.

[0030] The length of the connecting pipe 5 extending into the front chamber is in the range of 3 to 4 cm, and the length of the connecting pipe 5 extending into the rear chamber is in the range of 2 to 3 cm. The length of the connecting pipe 5 extending into the front chamber and the rear chamber is designed to improve the silencing effect of low-frequency noise and eliminate noise of 500 Hz to 700 Hz.

[0031] In this embodiment, the length of the perforated sleeve 7 located in the rear chamber ranges from 2 to 3 cm. By setting the length of the perforated sleeve 7 located in the rear chamber, the low-frequency component of the exhaust sound can be effectively reduced and the sound-absorbing effect can be improved.

[0032] In this embodiment, the diameter ratio of the input pipe 3 and the exhaust pipe 1 of the engine is: 0.9-1.5; the diameter ratio of the exhaust tail pipe 10 and the sleeve is: 0.5-0.8; the diameters of the input pipe 3, the exhaust pipe 1, the exhaust tail pipe 10 and the sleeve are designed, and the specific diameter values ​​can be set according to the needs of use, which can effectively attenuate the low-frequency components of the exhaust noise, and at the same time reduce the impact of the regenerated noise and improve the purity of the exhaust noise.

[0033] In this embodiment, the diameter ratio of the sleeve and the inner tube is 1.2 to 1.6. The design of the diameter ratio of the sleeve and the inner tube can improve the noise reduction effect on the set frequency noise.

[0034] The utility model discloses a motorcycle, comprising the muffler.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A muffler, characterized in that: It includes a muffler cylinder body, an inner cylinder is arranged inside the cylinder body, the inner cylinder forms a muffler chamber, a partition is arranged inside the muffler chamber to separate the muffler chamber into a front chamber and a rear chamber, the exhaust gas of the engine enters the front chamber through an input pipe, a connecting pipe is arranged between the front chamber and the rear chamber, and a perforated sleeve is supported in the rear chamber through a support plate and connected to the exhaust tail pipe.

2. The muffler according to claim 1, characterized in that: The perforated sleeve comprises a sleeve and an inner tube, the inner tube is provided with a plurality of first through holes, and a sound absorbing material is arranged between the inner tube and the sleeve; The length of the sleeve is smaller than the length of the inner tube, and the length of the sleeve is consistent with the length of the plurality of first through holes distributed in the inner tube.

3. The muffler according to claim 1, characterized in that: The support plate is provided with a plurality of communication holes.

4. The muffler according to claim 2, characterized in that: The front chamber is provided with a perforated plate, the perforated plate is provided with a plurality of second through holes, and the input pipe passes through the perforated plate and enters the front chamber.

5. The muffler according to claim 1, characterized in that: The side wall of the muffler inner cylinder is provided with a plurality of third through holes, and a sound absorbing material is provided between the muffler inner cylinder and the muffler cylinder body.

6. The muffler according to claim 1, characterized in that: The length of the input tube extending into the front chamber ranges from 4 to 6 cm; The length of the connecting pipe extending into the front chamber is in the range of 3 to 4 cm, and the length of the connecting pipe extending into the rear chamber is in the range of 2 to 3 cm.

7. The muffler according to claim 1, characterized in that: The length of the perforated sleeve located in the rear chamber ranges from 2 to 3 cm.

8. The muffler according to claim 2, characterized in that: The diameter ratio of the input pipe to the exhaust pipe of the engine is 0.9-1.5; the diameter ratio of the exhaust tail pipe to the sleeve is 0.5-0.

8.

9. The muffler according to claim 3, characterized in that: The diameter ratio of the sleeve and the inner tube is 1.2 to 1.

6.

10. A motorcycle, characterized in that: A muffler comprising any one of claims 1 to 9.

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