A muffler

Abstract

The present invention discloses a muffler, which includes a cylinder, the cylinder has an air inlet end and an exhaust end in the axial direction, a first partition and a third partition are arranged in the cylinder at intervals, along the air flow direction, the first partition and the third partition divide the inner cavity of the cylinder into an expansion muffler cavity, a resonance muffler cavity and a third muffler cavity, a plurality of first through holes are arranged on the first partition, and a plurality of third through holes are arranged on the third partition; a front row bend pipe is arranged at the air inlet end of the cylinder, an exhaust pipe is arranged at the air outlet end of the front row bend pipe, the exhaust pipe extends into the expansion muffler cavity, the diameter of the exhaust pipe is smaller than the inner diameter of the expansion muffler cavity, and a plurality of vents are arranged on the side wall of the exhaust pipe; a tail pipe is arranged at the exhaust end of the cylinder, and an outlet pipe connected to the third muffler cavity is arranged in the tail pipe. The present invention arranges the first partition and the third partition in the cylinder, so that the high-temperature exhaust gas passing through the cylinder undergoes multiple mutations, and the sound energy is greatly attenuated, thereby playing a role in reducing exhaust noise.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycle accessories, in particular to a muffler. Background Art

[0002] A motorcycle muffler is a device that allows airflow to pass through and attenuate noise. It is one of the important parts of a motorcycle. The performance of the muffler not only affects the noise level of the motorcycle and the comfort of riding a motorcycle, but also has a great impact on the engine's power, fuel consumption, torque and other performance.

[0003] The existing muffler has large vibration, high exhaust sound level and noise, poor overall performance, and cannot better eliminate a wide range of multi-frequency noise, and has a narrow scope of application. Summary of the invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the present invention provides a muffler, which is provided with a first baffle and a third baffle in a cylinder, so that the high-temperature exhaust gas passing through the cylinder undergoes multiple mutations, and the sound energy is greatly attenuated, thereby reducing the exhaust noise.

[0005] A silencer according to an embodiment of the present invention includes a cylinder, the cylinder having an air inlet end and an exhaust end in the axial direction, a first partition and a third partition are arranged in the cylinder at intervals, along the air flow direction, the first partition and the third partition divide the inner cavity of the cylinder into an expansion silencer cavity, a resonance silencer cavity and a third silencer cavity, a plurality of first through holes are arranged on the first partition, and a plurality of third through holes are arranged on the third partition; a front row bent pipe, the front row bent pipe is arranged at the air inlet end, an exhaust pipe is arranged at the air outlet end of the front row bent pipe, the exhaust pipe extends into the expansion silencer cavity, the diameter of the exhaust pipe is smaller than the inner diameter of the expansion silencer cavity, and a plurality of ventilation holes are arranged on the side wall of the exhaust pipe; a tail pipe, the tail pipe is arranged at the air outlet end, and an outlet pipe connected to the third silencer cavity is arranged in the tail pipe.

[0006] A muffler according to an embodiment of the present invention has at least the following technical effects: the inner cavity of the cylinder is divided into an expansion muffler chamber, a resonance muffler chamber and a third muffler chamber by arranging a first partition and a third partition. When working, the airflow exhausted by the motorcycle directly enters the exhaust pipe from the front bent pipe. Since the diameter of the exhaust pipe is smaller than the inner diameter of the expansion muffler chamber, when the airflow enters the expansion muffler chamber through the vent hole, the airflow is expanded, the flow rate is reduced, and the strong pulsating noise is attenuated; then when the airflow continues to flow through the resonance muffler chamber and the third muffler chamber, due to the obstruction of the first partition and the third partition, the airflow passes through the first through hole on the first partition and the third through hole on the third partition in turn, so that the airflow is suddenly compressed and divided into many thin streams, and then suddenly expands. After so many sudden changes, the sound energy is greatly attenuated, and finally it is discharged smoothly and gently to the external environment through the outlet pipe connected to the third muffler chamber, thereby reducing the exhaust noise.

[0007] According to some embodiments of the present invention, a second partition is arranged between the first partition and the third partition, the second partition divides the resonance muffler cavity into a first chamber and a second chamber, and a second through hole is arranged on the second partition, the second through hole is staggered with the first through hole, and the second through hole is staggered with the third through hole.

[0008] According to some embodiments of the present invention, five second through holes are provided, and the five second through holes are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent second through holes is 45°.

[0009] According to some embodiments of the present invention, a first middle hole with an opening concave inward is provided on the first partition, one end of the exhaust pipe is connected to the front bent pipe, and the other end is provided with a plugging cover to form a blind end, and the blind end is connected to the first middle hole.

[0010] According to some embodiments of the present invention, five first through holes are provided, and the five first through holes are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent first through holes is 45°.

[0011] According to some embodiments of the present invention, the third partition plate is penetrated by a plug hole, a first tube body is inserted into the plug hole, the first tube body connects the resonance silencer chamber and the third silencer chamber, and the first tube body and the exhaust pipe are staggered in the axial direction.

[0012] According to some embodiments of the present invention, a boss is provided on one side of the third partition plate, and the insertion hole is provided in the middle of the boss.

[0013] According to some embodiments of the present invention, the expansion muffler cavity is in a cone shape, and the inner diameter of the expansion muffler cavity gradually expands along the flow direction of the airflow.

[0014] According to some embodiments of the present invention, a mounting plate is provided on the cylinder, and a plurality of mounting holes connected to the motorcycle frame are provided on the mounting plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a first baffle in an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a third baffle in an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of a second baffle in an embodiment of the present invention;

[0021] The arrow direction in the figure is the air flow direction.

[0022] Reference numerals:

[0023] 100-cylinder, 110-inlet end, 120-outlet end, 130-expansion muffler chamber, 140-resonance muffler chamber, 141-first chamber, 142-second chamber, 150-third muffler chamber;

[0024] 210 - first baffle, 211 - first through hole, 212 - first middle hole, 220 - second baffle, 221 - second through hole, 230 - third baffle, 231 - third through hole, 232 - insertion hole, 233 - boss, 240 - first tube body;

[0025] 300-front elbow, 310-exhaust pipe, 311-vent, 320-blocking cover;

[0026] 400-tail pipe, 410-exhaust pipe;

[0027] 500-installation plate, 510-installation hole, 520-groove. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as “up”, “down”, “front”, “back”, “left”, “right”, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, if there are descriptions of "first", "second", "third", etc., they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figures 1 to 3As shown, a muffler according to an embodiment of the present invention includes a cylinder 100, a front bent pipe 300 and a tail pipe 400, the cylinder 100 has an air intake end 110 and an exhaust end in the axial direction, and a first partition 210 and a third partition 230 are arranged in the cylinder 100. Along the airflow direction, the first partition 210 and the third partition 230 divide the inner cavity of the cylinder 100 into an expansion muffler cavity 130, a resonance muffler cavity 140 and a third muffler cavity 150, and a plurality of first through holes 211 are arranged on the first partition 210, and a plurality of first through holes 212 are arranged on the third partition 230. 230 is provided with a plurality of third through holes 231; the front bent pipe 300 is arranged at the air inlet end 110 of the cylinder 100, and the air outlet end 120 of the front bent pipe 300 is provided with an exhaust pipe 310, the exhaust pipe 310 extends into the expansion silencer chamber 130, the diameter of the exhaust pipe 310 is smaller than the inner diameter of the expansion silencer chamber 130, and a plurality of ventilation holes 311 are provided on the side wall of the exhaust pipe 310; the tail pipe 400 is arranged at the air outlet end 120 of the cylinder 100, and an air outlet pipe 410 connected to the third silencer chamber 150 is provided in the tail pipe 400. Compared with the prior art, the embodiment of the present invention divides the inner cavity of the cylinder 100 into an expansion muffler chamber 130, a resonance muffler chamber 140 and a third muffler chamber 150 by setting a first partition 210 and a third partition 230. When working, the airflow discharged from the motorcycle directly enters the exhaust pipe 310 from the front elbow 300. Since the diameter of the exhaust pipe 310 is smaller than the inner diameter of the expansion muffler chamber 130, when the airflow enters the expansion muffler chamber 130 through the vent 311, the airflow is expanded, the flow rate is reduced, and the strong pulsating noise is attenuated; subsequently, when the airflow continues to flow through the resonance muffler chamber 140 and the third muffler chamber 150, due to the obstruction of the first partition 210 and the third partition 230, the airflow is sequentially discharged from the first partition 211 and the third partition 230. 0 and the third through hole 231 on the third baffle 230, so the airflow is suddenly compressed and divided into many thin streams, and then suddenly expanded. With so many mutations, the sound energy is greatly attenuated, and finally discharged smoothly and gently to the outside environment through the outlet pipe 410 connected to the third muffler chamber 150, thereby reducing the exhaust noise; at the same time, by extending the exhaust pipe 310 into the expansion muffler chamber 130, the exhaust back pressure can be effectively stabilized, so that the engine can play a higher working efficiency. Specifically, the vents 311 are arranged in multiple rows, and the vents 311 in each row are evenly spaced along the axial direction of the exhaust pipe 310; the vents 311 in each row are evenly spaced along the circumference of the exhaust pipe 310. Preferably, the vents 311 are circular holes. It can be understood that the axial direction of the exhaust pipe 310 refers to Figure 1 The left and right directions indicated in .

[0033] Further, the barrel 100, the front curved pipe 300, the first partition 210, the third partition 230 and the tail pipe 400 are all made of a certain strength rigid material, such as stainless steel, cast iron, aluminum alloy or other alloys. Optionally, the wall thickness of the barrel 100 and the tail pipe 400 is 1.2 mm, the wall thickness of the first partition 210 and the second partition 220 is 1.5 mm, and the wall thickness of the front curved pipe 300 is 2 mm. Of course, according to actual needs, the barrel 100, the front curved pipe 300, the first partition 210, the third partition 230 and the tail pipe 400 can be selected according to the actual size of the motorcycle muffler.

[0034] like Figure 1 and Figure 4 As shown, in some embodiments of the present invention, a second partition 220 is arranged between the first partition 210 and the third partition 230, and the second partition 220 divides the resonance muffler cavity 140 into a first chamber 141 and a second chamber 142. A second through hole 221 is arranged on the second partition 220, and the second through hole 221 is staggered with the first through hole 211, and the second through hole 221 is staggered with the third through hole 231. By arranging the second partition 220 to divide the resonance muffler cavity 140 into the first chamber 141 and the second chamber 142, a sudden change is added when the airflow passes through the resonance muffler cavity 140, and the attenuation of the sound energy is further increased, thereby further reducing the exhaust noise; at the same time, by staggering the second through hole 221 with the first through hole 211 and the third through hole 231, the route of the airflow through the cylinder 100 is continuously adjusted, the time for the airflow to pass through the cylinder 100 is extended, and the exhaust noise is further reduced.

[0035] like Figure 4 As shown, further, five second through holes 221 are provided, and the five second through holes 221 are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent second through holes 221 is 45°. This arrangement can not only ensure that the airflow enters the second chamber 142 from the first chamber 141, but also prolong the flow time of the airflow, greatly reduce the flow rate, and have a significant noise reduction effect.

[0036] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, a first middle hole 212 with an opening concave inward is provided on the first partition plate 210, one end of the exhaust pipe 310 is connected to the front bent pipe 300, and the other end is provided with a plugging cover 320 to form a blind end, and the blind end is connected to the first middle hole 212. In this way, the airflow discharged from the motorcycle directly enters the exhaust pipe 310 from the front bent pipe 300, and the airflow will hit the pipe wall of the exhaust pipe 310 and the plugging cover 320, consuming part of the kinetic energy; at this time, the pulsed airflow that rebounds in the air intake direction continuously impacts with another part of the pulsed airflow that rushes toward the blind end of the exhaust pipe 310, and forms a relatively high air pressure in the exhaust pipe 310, and a muffler effect can be achieved during the mutual impact of the airflows; the airflow that has consumed part of the kinetic energy is dispersed from the vents 311 of the exhaust pipe 310 and directly enters the expansion pipe 310. expansion silencer chamber 130; a small part of the airflow discharged through the vent hole 311 of the exhaust pipe 310 in the expansion silencer chamber 130 hits the inner wall of the cylinder 100, and most of it flows into the resonance silencer chamber 140 through the first through hole 211 of the first partition plate 210, and then enters the third silencer chamber 150 through the third through hole 231 of the third partition plate 230. After two mutations, the sound energy is greatly attenuated, and finally it is discharged smoothly and gently to the external environment through the outlet pipe 410 connected to the third silencer chamber 150, thereby playing a role in reducing exhaust noise.

[0037] like Figure 2 As shown, further, five first through holes 211 are provided, and the five first through holes 211 are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent first through holes 211 is 45°. This arrangement can not only ensure that the airflow enters the resonance muffler chamber 140 from the expansion muffler chamber 130, but also prolong the circulation time of the airflow, greatly reduce the flow rate, and have a significant noise reduction effect.

[0038] like Figure 1 and Figure 3 As shown, in some embodiments of the present invention, the third partition plate 230 is penetrated by a plug hole 232, and a first tube body 240 is inserted into the plug hole 232. The first tube body 240 connects the resonance muffler cavity 140 and the third muffler cavity 150, and the first tube body 240 and the air outlet pipe 410 are staggered in the axial direction. By staggering the first tube body 240 and the air outlet pipe 410 in the axial direction, the flow velocity of the airflow can be further reduced, thereby further improving the noise reduction effect. It should be noted that the axial direction described here refers to Figure 1 The left and right direction in .

[0039] Furthermore, a boss 233 is provided on one side of the third partition plate 230, and the insertion hole 232 is provided in the middle of the boss 233. When the third partition plate 230 is welded in the cylinder 100, the boss 233 plays a role in guiding the installation and preventing foolishness, so that the third partition plate 230 can be accurately welded in the cylinder 100, and the boss 233 can increase the contact area with the first tube body 240, so that the first tube body 240 can be stably plugged into the third partition plate 230.

[0040] In some embodiments of the present invention, the expansion muffler chamber 130 is conical, and the inner diameter of the expansion muffler chamber 130 gradually expands along the flow direction of the airflow. This configuration is conducive to the airflow passing through the first through hole 211 and entering the resonance muffler chamber 140 from the expansion muffler chamber 130.

[0041] In some embodiments of the present invention, a mounting plate 500 is provided on the cylinder 100, and a mounting hole 510 connected to the motorcycle frame is provided on the mounting plate 500. The muffler is fixed to the motorcycle frame by installing the hanger. Specifically, the side wall of the mounting plate 500 is recessed inward to form a groove 520 to reduce the overall weight of the muffler. Preferably, the mounting hole 510 is a waist-shaped hole to adjust the position of the muffler installed on the motorcycle frame and improve the convenience of assembly.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A muffler, characterized in that: include: A cylinder (100) having an air inlet end (110) and an air outlet end in an axial direction; a first partition plate (210) and a third partition plate (230) are arranged in the cylinder (100) at intervals; along the airflow direction, the first partition plate (210) and the third partition plate (230) divide the inner cavity of the cylinder (100) into an expansion muffler cavity (130), a resonance muffler cavity (140) and a third muffler cavity (150); a plurality of first through holes (211) are arranged on the first partition plate (210), and a plurality of third through holes (231) are arranged on the third partition plate (230); A front bent pipe (300) is arranged at the air inlet end (110); an exhaust pipe (310) is arranged at the air outlet end (120) of the front bent pipe (300); the exhaust pipe (310) extends into the expansion muffler cavity (130); the diameter of the exhaust pipe (310) is smaller than the inner diameter of the expansion muffler cavity (130); and a plurality of vent holes (311) are arranged on the side wall of the exhaust pipe (310); A tail pipe (400) is arranged at the gas outlet end (120), wherein a gas outlet pipe (410) connected to the third muffler chamber (150) is arranged inside the tail pipe (400); A second partition plate (220) is arranged between the first partition plate (210) and the third partition plate (230), the second partition plate (220) dividing the resonance silencing cavity (140) into a first chamber (141) and a second chamber (142), a second through hole (221) is arranged on the second partition plate (220), the second through hole (221) and the first through hole (211) are arranged staggered, and the second through hole (221) and the third through hole (231) are arranged staggered; The first partition plate (210) is provided with a first central hole (212) with an opening concave inwardly, one end of the exhaust pipe (310) is connected to the front bent pipe (300), and the other end is provided with a blocking cover (320) to form a blind end, and the blind end is connected to the first central hole (212).

2. A muffler according to claim 1, characterized in that: Five second through holes (221) are provided, and the five second through holes (221) are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent second through holes (221) is 45°.

3. A muffler according to claim 1, characterized in that: Five first through holes (211) are provided, and the five first through holes (211) are arranged at intervals along the circumferential direction, and the circumferential angle between two adjacent first through holes (211) is 45°.

4. A muffler according to claim 1, characterized in that: The third partition plate (230) is penetrated by an insertion hole (232), a first tube body (240) is inserted into the insertion hole (232), the first tube body (240) is connected to the resonance muffler cavity (140) and the third muffler cavity (150), and the first tube body (240) and the air outlet pipe (410) are staggered in the axial direction.

5. A muffler according to claim 4, characterized in that: A boss (233) is provided on one side of the third partition plate (230), and the insertion hole (232) is provided in the middle of the boss (233).

6. A muffler according to claim 1, characterized in that: The expansion silencer cavity (130) is in a cone shape, and the inner diameter of the expansion silencer cavity (130) gradually expands along the flow direction of the airflow.

7. A muffler according to claim 1, characterized in that: The cylinder (100) is provided with a mounting plate (500), and the mounting plate (500) is provided with a plurality of mounting holes (510) connected to a motorcycle frame.

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