Symmetrical reverse exhaust silencer

Abstract

The invention discloses a symmetrical reverse exhaust silencer which comprises a silencer lower cover, a silencer upper cover, an exhaust inner partition plate and an exhaust outer partition plate, the silencer lower cover is connected with the silencer upper cover, an inner cavity is formed between the silencer lower cover and the silencer upper cover, the exhaust inner partition plate is connected with the inner side of the silencer upper cover, and the exhaust outer partition plate is connected with the inner side of the silencer upper cover. The exhaust outer partition plate is connected with the outer side of the silencer upper cover and arranged between the silencer upper cover and the exhaust pipe, the exhaust inner partition plate is provided with a first exhaust port, the exhaust outer partition plate is provided with a second exhaust port, and the first exhaust port and the second exhaust port are opposite in direction. The silencer is simple in structure and convenient to use, multiple times of direction sudden change and speed reduction of airflow are achieved through the exhaust inner partition plate and the exhaust outer partition plate which are symmetrically and reversely arranged, the silencing path is prolonged, and therefore the silencing effect is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, in particular to a small universal gasoline engine symmetrical reverse exhaust muffler. Background Art

[0002] Exhaust noise is the primary source of noise in small, general-purpose gasoline engines. Mufflers, as crucial components, play a crucial role in reducing this noise. Existing mufflers utilize a multi-chamber structure formed by a muffler housing and baffles, achieving this goal by utilizing the reflection and interference effects of sound waves and extending the muffler path.

[0003] The utility model patent with application number 202321076099.4 discloses a universal gasoline engine muffler, including a left shell with an exhaust gas inlet and a right shell with an exhaust port. The chamber III formed by the left partition and the right partition in the middle divides the chamber composed of the left shell and the right shell into chamber I and chamber II. The right partition and the right shell are provided with exhaust ports. The exhaust pipe is inserted into chamber II, one end is connected to the right partition, and the other end is connected to the right shell, connecting chamber III with the outside world. Vents are provided on the left partition and the right partition to connect chamber I, chamber II and chamber III.

[0004] The above-mentioned silencers utilize the reflection and interference effects of sound waves and extend the silencer path, but the noise reduction effect still needs to be further improved. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a small universal gasoline engine muffler which can achieve a silencing effect by multi-stage buffering of airflow sound waves through cross-section mutation, cavity change and the like.

[0006] In order to solve the above technical problems, the present invention provides a symmetrical reverse exhaust muffler, including a muffler lower cover and a muffler upper cover, the muffler lower cover is connected to the muffler upper cover, and an internal cavity is formed between the muffler lower cover and the muffler upper cover, and also includes an exhaust inner baffle and an exhaust outer baffle, the exhaust inner baffle is connected to the inner side of the muffler upper cover, the exhaust outer baffle is connected to the outer side of the muffler upper cover, and is arranged between the muffler upper cover and the exhaust pipe, the exhaust inner baffle is provided with exhaust port 1, the exhaust outer baffle is provided with exhaust port 2, and the exhaust port 1 is in opposite directions to the exhaust port 2.

[0007] Furthermore, the symmetrical reverse exhaust muffler also includes a muffler baffle, which is arranged between the muffler lower cover and the muffler upper cover. The muffler baffle and the muffler lower cover form chamber I, and the muffler baffle and the muffler upper cover form chamber II.

[0008] Furthermore, a sound-absorbing reflection cavity and a plurality of silencer holes are provided on the muffler partition, and the chamber I and the chamber II are connected through the silencer holes.

[0009] Furthermore, the exhaust inner baffle is arranged in chamber II, and chamber III is formed between the exhaust inner baffle and the muffler upper cover.

[0010] Furthermore, the symmetrical reverse exhaust muffler also includes an exhaust pipe, which is connected to the outer side of the muffler upper cover, and a chamber V is formed between the exhaust pipe and the muffler upper cover.

[0011] Furthermore, the exhaust outer baffle is arranged in the chamber V, and a chamber IV is formed between the exhaust outer baffle and the muffler upper cover.

[0012] Furthermore, a plurality of exhaust holes are provided on the upper cover of the muffler, and the chamber III is connected with the chamber IV through the exhaust holes.

[0013] Furthermore, fireproof nets are provided at the exhaust port 1 and the exhaust port 2.

[0014] Furthermore, the exhaust pipe is provided with a third exhaust port, and the third exhaust port is directed outward along the axis.

[0015] The present invention boasts a clever structural design, low manufacturing costs, and high reliability. By varying the chamber, the exhaust gas vibration frequency is altered, gradually changing the airflow sound frequency. Multiple sudden changes in airflow direction and deceleration extend the silencing path, thereby enhancing the noise reduction effect. Furthermore, the compact structure reduces component weight, improving the overall compactness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiment and its description are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0017] Figure 1 Schematic diagram of the external structure of the present invention; Figure 2 It is a structural exploded view of the present invention; Figure 3 Schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the exhaust inner baffle structure of the present invention; Figure 5 It is a schematic diagram of the exhaust outer baffle structure of the present invention.

[0018] Explanation of the serial numbers in the accompanying drawings: 1. Muffler lower cover; 2. Flange; 3. Support pipe; 4. Muffler baffle; 5. Exhaust inner baffle; 6. Muffler upper cover; 7. Fire net; 8. Exhaust port gasket; 9. Exhaust outer baffle; 10. Exhaust pipe; 11. Screw; 12. Vent; 13. Vent; 14. Exhaust port; 15. Exhaust hole; 16. Exhaust port; 17. Exhaust port; 18. Chamber I; 19. Chamber II; 20. Sound-absorbing and reflecting chamber; 21. Chamber III; 22. Chamber IV; 23. Chamber V. DETAILED DESCRIPTION

[0019] It should be noted that the directional nouns that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back, inside, outside", etc., are based on the view orientations shown in the corresponding drawings of the specification. Their purpose is only to facilitate those skilled in the art to better understand the technical solution of the present invention, and they should not be regarded as limiting the scope of protection or technical solution of the present invention.

[0020] It should also be noted that, unless otherwise specified or limited, the terms "install," "assemble," "connect," and "connect" should be understood broadly. For example, they can refer to fixed or removable connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1 、 Figure 2 As shown, a symmetrical reverse exhaust muffler includes a muffler lower cover 1 and a muffler upper cover 6. The muffler lower cover 1 is connected to the muffler upper cover 6, and an internal cavity is formed between the muffler lower cover 1 and the muffler upper cover 6. The muffler lower cover 1 is provided with a flange 2. The muffler lower cover 1 and the muffler upper cover 6 are supported by the flange 2 and the support pipe 3. The symmetrical reverse exhaust muffler also includes an exhaust inner baffle 5 and an exhaust outer baffle 9. The exhaust inner baffle 5 is connected to the inner side of the muffler upper cover 6, and the exhaust outer baffle 9 is connected to the outer side of the muffler upper cover 6. They are arranged between the muffler upper cover 6 and the exhaust pipe 10. The exhaust inner baffle 5 is provided with an exhaust port 14, and the exhaust outer baffle 9 is provided with an exhaust port 2 16. The exhaust port 14 is in opposite directions to the exhaust port 2 16. The symmetrical reverse exhaust muffler also includes a muffler baffle 4, which is arranged between the muffler lower cover 1 and the muffler upper cover 6.

[0023] like Figure 2 、 Figure 3As shown, the muffler baffle 4 and the muffler lower cover 1 form chamber I18, and the muffler baffle 4 and the muffler upper cover 6 form chamber II19. The muffler baffle 4 is provided with a sound-absorbing reflection chamber 20 and a plurality of muffler holes 13. Chamber I18 and chamber II19 are placed in chamber II19 for muffler purposes. A chamber III21 is formed between the exhaust inner baffle 5 and the muffler upper cover 6. The symmetrical reverse exhaust muffler also includes an exhaust pipe 10, which is connected to the outside of the muffler upper cover 6. A chamber V23 is formed between the exhaust outer baffle 9 and the muffler upper cover 6. The exhaust outer baffle 9 is disposed in chamber V23, and a chamber IV22 is formed between the exhaust outer baffle 9 and the muffler upper cover 6. The muffler upper cover 6 is provided with a plurality of exhaust holes 15, and chambers III21 and IV22 are connected through the exhaust holes 15. A fire screen 7 and an exhaust port gasket 8 are installed between the muffler upper cover 6 and the exhaust outer baffle 9. Fire screens can also be installed at exhaust port 14 and exhaust port 2 16. The exhaust pipe 10 is provided with an exhaust port 3 17, which faces outward along the axis. The exhaust pipe 10, the exhaust outer baffle 9, the exhaust port gasket 8, and the fire screen 7 are fastened to the muffler upper cover 6 with screws 11.

[0024] like Figure 3 As shown, the exhaust gas enters chamber I18 through the vent 12, enters chamber II19 through the silencer hole 13 on the muffler baffle 4, enters chamber III21 through the exhaust port 14 on the exhaust inner baffle 5, enters chamber IV22 through the exhaust port 15 on the muffler upper cover 6, enters chamber V23 through the exhaust port 2 16 on the exhaust outer baffle 9, and is finally discharged through the exhaust port 3 17 on the exhaust pipe 10.

[0025] Specifically, after entering chamber I 18, the high-pressure, high-speed airflow is amplified and its vibration is altered. It then changes direction through the sound-absorbing and reflective cavity 20 on the partition 4, causing the airflow to interfere, rub, and offset each other, thereby slowing down the airflow. After multiple reflections, it enters chamber II 19 through the muffler hole 13 with a sudden change in cross-section. The airflow entering chamber II 19 is further amplified by the chamber, causing its vibration frequency to change, further slowing the airflow. The airflow enters chamber III21 through exhaust port 14 on the exhaust inner baffle 5, and the direction of the airflow changes from axial to radial at this time; the airflow enters chamber IV22 through exhaust port 15 on the muffler upper cover 6, and the direction of the airflow changes from radial to axial at this time; the airflow enters chamber V23 through exhaust port 2 16 on the exhaust outer baffle 9, and the direction of the airflow changes from axial to radial at this time; finally, it is discharged through exhaust port 3 17 on the exhaust pipe 10, and the direction of the airflow changes from radial to axial at this time; since the exhaust port 14 of the exhaust inner baffle 5 and the exhaust port 2 16 of the exhaust outer baffle 9 are symmetrically arranged in opposite directions, the airflow achieves multiple directional mutations and decelerations when passing through exhaust port 14, exhaust hole 15, exhaust port 2 16, and exhaust port 3 17, thereby extending the silencing path and further improving the silencing effect.

[0026] The above drawings and descriptions represent only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to numerous modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A symmetrical reverse exhaust muffler, comprising a muffler lower cover (1) and a muffler upper cover (6), wherein the muffler lower cover (1) is connected to the muffler upper cover (6), and an internal cavity is formed between the muffler lower cover (1) and the muffler upper cover (6), characterized in that: The invention also includes an exhaust inner baffle (5) and an exhaust outer baffle (9), wherein the exhaust inner baffle (5) is connected to the inner side of the muffler upper cover (6), and the exhaust outer baffle (9) is connected to the outer side of the muffler upper cover (6), and is arranged between the muffler upper cover (6) and the exhaust pipe (10), wherein the exhaust inner baffle (5) is provided with an exhaust port 1 (14), and the exhaust outer baffle (9) is provided with an exhaust port 2 (16), and the exhaust port 1 (14) and the exhaust port 2 (16) are in opposite directions.

2. The symmetrical reverse exhaust muffler according to claim 1, characterized in that: The muffler further comprises a muffler baffle (4), which is arranged between the muffler lower cover (1) and the muffler upper cover (6), wherein the muffler baffle (4) and the muffler lower cover (1) form a chamber I (18), and the muffler baffle (4) and the muffler upper cover (6) form a chamber II (19).

3. The symmetrical reverse exhaust muffler according to claim 2, characterized in that: The muffler partition (4) is provided with a sound-absorbing reflection cavity (20) and a plurality of muffler holes (13), and the cavity I (18) and the cavity II (19) are connected through the muffler holes (13).

4. The symmetrical reverse exhaust muffler according to claim 3, characterized in that: The exhaust inner baffle (5) is arranged in chamber II (19), and a chamber III (21) is formed between the exhaust inner baffle (5) and the muffler upper cover (6).

5. The symmetrical reverse exhaust muffler according to claim 4, characterized in that: It also includes an exhaust pipe (10), the exhaust pipe (10) is connected to the outside of the muffler upper cover (6), and a chamber V (23) is formed between the exhaust pipe (10) and the muffler upper cover (6).

6. The symmetrical reverse exhaust muffler according to claim 5, characterized in that: The exhaust outer baffle (9) is arranged in the chamber V (23), and a chamber IV (22) is formed between the exhaust outer baffle (9) and the muffler upper cover (6).

7. The symmetrical reverse exhaust muffler according to claim 6, characterized in that: The muffler upper cover (6) is provided with a plurality of exhaust holes (15), and the chamber III (21) and the chamber IV (22) are connected through the exhaust holes (15).

8. The symmetrical reverse exhaust muffler according to claim 7, characterized in that: Fireproof nets are provided at the exhaust port 1 (14) and the exhaust port 2 (16).

9. The symmetrical reverse exhaust muffler according to any one of claims 1 to 8, characterized in that: The exhaust pipe (10) is provided with an exhaust port three (17), and the exhaust port three (17) is directed outward along the axis.

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