Silencer and engine
By designing the closed cavity structure and resonant cavity in the muffler, combining the through hole group and sound insulation layer, the problem of poor noise reduction effect caused by the straight line flow of the muffler air flow is solved, and effective noise attenuation is achieved.
Patent Information
- Application Number
- CN202422545257.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The cavity design of existing mufflers causes the airflow to flow in a straight line overall, the noise reduction effect is not obvious, and there is noise pollution.
Two mounting shells are used to form a closed cavity structure, including a resonant cavity and multiple through-hole groups, combined with a sound insulation layer and exhaust pipe design, forming a specific airflow channel to reflect and interfere with the sound waves multiple times.
Effectively attenuate engine exhaust noise, reduce noise level, and improve sound absolution effect through multiple reflections and interference sound waves.
Smart Images
Figure CN223075608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine accessories, in particular to a muffler and an engine. Background Art
[0002] A muffler is an important component of an engine. When the engine is working, the muffler can reduce the noise generated by the engine, reduce vibration, and thus improve the comfort of equipment use. Most of the current engine mufflers are composed of a housing and a plurality of partitions arranged in the housing. The housing is divided into respective cavities by the partitions. The gas passes through each cavity and finally is discharged through the exhaust pipe. The formed cavities make the overall air flow in a straight line direction, and the noise reduction effect on the generated sound waves is not obvious, and there is still a certain degree of noise pollution. Summary of the Utility Model
[0003] Aiming at the deficiencies in the prior art, the utility model provides a muffler and an engine, which solve the problem that in the prior art, the formed cavities of the muffler make the overall air flow in a straight line direction, the noise reduction effect on the generated sound waves is not obvious, and there is still a certain degree of noise pollution.
[0004] According to an embodiment of the utility model, the following technical solutions are adopted:
[0005] A muffler, comprising:
[0006] Two mounting shells, which are buckled with each other to form a closed cavity structure, and one of the mounting shells is provided with an air inlet hole;
[0007] A first shell and a second shell located between the two mounting shells. The first shell is buckled on the second shell to form a resonance cavity, and the cavity structure is divided into a first cavity and a second cavity. The resonance cavity has an exhaust hole, and the exhaust hole penetrates through one of the mounting shells. The first shell is provided with a first through-hole group and a second through-hole group. The second through-hole group corresponds to the resonance cavity. The second shell is provided with a notch, and the notch corresponds to the first through-hole group, so that the first cavity, the second cavity and the resonance cavity form a through air flow channel.
[0008] Preferably, it further comprises two fixing shells, which are buckled on the two mounting shells, and a sound insulation layer is filled between the fixing shells and the mounting shells.
[0009] Preferably, the end of the exhaust hole is sleeved with an exhaust pipe, and the exhaust pipe penetrates through the fixing shell.
[0010] Preferably, it further comprises a sound insulation shell, which comprises a first outer shell and a second outer shell buckled with each other. The two fixing shells are located between the first outer shell and the second outer shell, and the exhaust pipe and the air inlet hole penetrate through the second outer shell and the first outer shell respectively.
[0011] Preferably, the first housing is provided with a mounting seat corresponding to the air inlet hole, and a mounting bolt is passed through the mounting seat.
[0012] Preferably, the mounting bolt is passed between the mounting shell, the fixing shell and the mounting seat.
[0013] Preferably, connection blocks are provided on both sides of the first housing, connection seats are provided on both sides of the second housing, the connection blocks are snap-fitted into the connection seats, and holes for screws to pass through are provided.
[0014] Preferably, the fixing shell is provided with a plurality of U-shaped seats, and nuts are fixedly provided inside the U-shaped seats, and the nuts correspond to the holes of the connection blocks.
[0015] Preferably, the first housing is fixedly provided with a fixing block, and the fixing block is provided with a fixing hole.
[0016] According to an embodiment of the present invention, the following technical solution is also adopted:
[0017] An engine includes a muffler.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] In this solution, the engine exhaust gas enters the first cavity through the air inlet hole, enters the second cavity through the first through-hole group, and finally enters the resonance cavity through the second through-hole group and is discharged through the exhaust hole. A specific air flow channel is formed by the first cavity, the second cavity and the resonance cavity to guide the engine gas, so that the sound wave will be reflected and interfered many times after entering the air flow channel, and the noise generated during the engine exhaust can be effectively attenuated, thereby reducing the noise level. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic cross-sectional structure diagram of the muffler in the embodiment of the present invention.
[0021] Figure 2 It is a schematic three-dimensional structure diagram of the muffler at one angle in the embodiment of the present invention.
[0022] Figure 3 It is a schematic three-dimensional structure diagram of the muffler at another angle in the embodiment of the present invention.
[0023] Figure 4 It is an exploded structure diagram of the first housing and the second housing in the embodiment of the present invention.
[0024] Figure 5 It is an exploded structure diagram of the sound insulation housing in the embodiment of the present invention.
[0025] Figure 6It is a schematic diagram of the internal structure of the sound insulation shell in the embodiment of the present utility model.
[0026] In the above-mentioned drawings: 1. First housing; 101. Exhaust hole; 102. Resonant cavity; 103. First through-hole group; 104. Second through-hole group; 105. Air inlet hole; 2. Second housing; 201. Notch; 3. Exhaust pipe; 4. Sound insulation shell; 401. First outer shell; 402. Second outer shell; 403. Mounting seat; 404. Mounting bolt; 405. Connecting block; 406. Connecting seat; 407. U-shaped seat; 408. Nut; 5. Mounting shell; 501. First cavity; 502. Second cavity; 503. Sound insulation layer; 6. Fixed shell; 7. Fixed block; 701. Fixed hole. Detailed implementation manners
[0027] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.
[0028] As Figures 1 to 4 shown, an embodiment of the present utility model provides a muffler, including:
[0029] Two mounting shells 5, the two mounting shells 5 are buckled with each other to form a closed cavity structure, and one of the mounting shells 5 is provided with an air inlet hole 105;
[0030] A first housing 1 and a second housing 2 located between the two mounting shells 5, the first housing 1 is buckled to the second housing 2 to form a resonant cavity 102, and the cavity structure is divided into a first cavity 501 and a second cavity 502. The resonant cavity 102 has an exhaust hole 101, the exhaust hole 101 penetrates through one of the mounting shells 5, the first housing 1 is provided with a first through-hole group 103 and a second through-hole group 104, the second through-hole group 104 corresponds to the resonant cavity 102, and the second housing 2 is provided with a notch 201, the notch 201 corresponds to the first through-hole group 103, so that the first cavity 501, the second cavity 502 and the resonant cavity 102 form a through air flow channel.
[0031] In the embodiment of the present utility model, when assembling the first housing 1, the second housing 2 and the two mounting housings 5, the first housing 1 and the second housing 2 can be connected by welding so that the first housing 1 and the second housing 2 form an integral body to ensure the sealing of the resonant cavity 102. Then, the two mounting housings 5 are respectively located on the sides of the first housing 1 and the second housing 2 and riveted, so that a closed cavity structure is formed between the mounting housings 5, and the first cavity 501 and the second cavity 502 are formed through the separation of the first housing 1 and the second housing 2. When the engine exhaust gas enters the cavity structure through the intake hole 105, it first enters the first cavity 501, then enters the second cavity 502 under the diversion of the first through-hole group 103, and enters the resonant cavity 102 through the diversion of the second through-hole group 104, and finally is discharged through the exhaust hole 101. A specific air flow channel is formed through the first cavity 501, the second cavity 502 and the resonant cavity 102 to divert the engine gas, so that the sound wave will be reflected and interfered many times after entering the air flow channel, and the noise generated during engine exhaust can be effectively attenuated, thereby reducing the noise level.
[0032] Based on the above solution, as Figure 1 shown, it further includes two fixing housings 6. The two fixing housings 6 are buckled on the two mounting housings 5, and a sound insulation layer 503 is filled between the fixing housings 6 and the mounting housings 5; the assembly method of the two fixing housings 6 is the same as that of the two mounting housings 5, so that between the two fixing housings 6 and the two mounting housings 5 respectively, and they are also fixedly connected by riveting, which increases the overall thickness of the mounting housing 5, and a sound insulation layer 503 is filled between the fixing housing 6 and the mounting housing 5, which can better absorb the sound wave and further reduce the noise level. Among them, the sound insulation layer 503 includes but is not limited to steel wire materials, which can eliminate a part of the sound wave, thereby reducing the sound wave discharge.
[0033] Specifically, as Figure 1 shown in Figure 6 connection with
[0034] Based on the above solution, as Figure 1As shown in the figure, it further includes a sound insulation shell 4. The sound insulation shell 4 includes a first outer shell 401 and a second outer shell 402 that are buckled with each other. Two fixing shells 6 are located between the first outer shell 401 and the second outer shell 402, and the exhaust pipe 3 and the air inlet hole 105 respectively penetrate through the second outer shell 402 and the first outer shell 401. Under the action of the sound insulation shell 4, the first outer shell 401 and the second outer shell 402 can be respectively located on the sides of the two fixing shells 6 and buckled with each other to enclose the two fixing shells 6. Both the first outer shell 401 and the second outer shell 402 are made of sound-absorbing materials, which further improves the sound wave elimination effect.
[0035] Specifically, the first outer shell 401 is provided with a mounting seat 403 corresponding to the air inlet hole 105, and a mounting bolt 404 is passed through the mounting seat 403. With the cooperation of the mounting seat 403 and the mounting bolt 404, the mounting seat 403 can be butted against the exhaust end of the engine, and the first outer shell 401 can be fixedly installed on the exhaust end of the engine through the mounting bolt 404 for supporting use with the engine. Moreover, the mounting bolt 404 passes through between the mounting shell 5, the fixing shell 6 and the mounting seat 403; the mounting shell 5, the fixing shell 6 and the mounting seat 403 can be assembled together through the mounting bolt 404, ensuring the connection strength of the three and ensuring the normal operation of each cavity for sound wave processing.
[0036] Specifically, as Figure 5 shown, both sides of the first outer shell 401 are provided with connecting blocks 405, and both sides of the second outer shell 402 are provided with connecting seats 406. The connecting blocks 405 are clamped in the connecting seats 406, and both are provided with holes for screws to pass through. To facilitate the assembly of the first outer shell 401 and the second outer shell 402, after the first outer shell 401 and the second outer shell 402 are buckled, the connecting blocks 405 are clamped inside the connecting seats 406, and the holes of the connecting blocks 405 and the connecting seats 406 just correspond. The screws can be directly passed through the corresponding two holes for quick fixed connection.
[0037] Secondly, the fixing shell 6 is provided with a number of U-shaped seats 407, and nuts 408 are fixedly arranged inside the U-shaped seats 407. The nuts 408 correspond to the holes of the connecting blocks 405. To increase the stability of the internal structure (fixing shell 6), after the fixing shell 6 is assembled, the U-shaped seats 407 are fixedly installed on the surface of the fixing shell 6 by welding. When assembling the first outer shell 401 and the second outer shell 402 with screws, the screws are connected to the nuts 408 of the U-shaped seats 407, thereby fixing the U-shaped seats 407.
[0038] Specifically, as Figure 2 shown, the first outer shell 401 is fixedly provided with a fixing block 7, and the fixing block 7 is provided with a fixing hole 701; with the action of the fixing block 7, it can be assembled with the engine through the fixing hole 701 to ensure the stable installation of the muffler on the engine.
[0039] As Figure 1 shown, an embodiment of the present utility model provides an engine, which includes the above-mentioned muffler.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.
Claims
1. A muffler, characterized in that, Comprising: Two mounting shells (5), the two mounting shells (5) are buckled with each other to form a closed cavity structure, and one of the mounting shells (5) is provided with an air inlet hole (105); A first housing (1) and a second housing (2) located between the two mounting shells (5), the first housing (1) is buckled to the second housing (2) to form a resonant cavity (102), and the cavity structure is divided into a first cavity (501) and a second cavity (502), and the resonant cavity (102) has an exhaust hole (101), the exhaust hole (101) penetrates through one of the mounting shells (5), the first housing (1) is provided with a first through-hole group (103) and a second through-hole group (104), the second through-hole group (104) corresponds to the resonant cavity (102), the second housing (2) is provided with a notch (201), the notch (201) corresponds to the first through-hole group (103), so that the first cavity (501), the second cavity (502) and the resonant cavity (102) form a through air flow channel.
2. The muffler according to claim 1, characterized in that, It further includes two fixing shells (6), the two fixing shells (6) are buckled on the two mounting shells (5), and a sound insulation layer (503) is filled between the fixing shells (6) and the mounting shells (5).
3. A muffler according to claim 2, characterized in that, One end of the exhaust hole (101) is sleeved with an exhaust pipe (3), and the exhaust pipe (3) penetrates through the fixing shell (6).
4. A muffler according to claim 3, characterized in that, It further includes a sound insulation shell (4), the sound insulation shell (4) includes a first outer shell (401) and a second outer shell (402) buckled with each other, the two fixing shells (6) are located between the first outer shell (401) and the second outer shell (402), and the exhaust pipe (3) and the air inlet hole (105) respectively penetrate through the second outer shell (402) and the first outer shell (401).
5. A muffler according to claim 4, characterized in that, The first outer shell (401) is provided with a mounting seat (403) corresponding to the air inlet hole (105), and a mounting bolt (404) is passed through the mounting seat (403).
6. The muffler according to claim 5, characterized in that, The mounting bolt (404) passes through between the mounting shell (5), the fixing shell (6) and the mounting seat (403).
7. A muffler according to claim 4, characterized in that, Both sides of the first outer shell (401) are provided with connecting blocks (405), both sides of the second outer shell (402) are provided with connecting seats (406), the connecting blocks (405) are clamped to the connecting seats (406), and are both provided with holes for screws to pass through.
8. A muffler according to claim 7, wherein, The fixing shell (6) is provided with a plurality of U-shaped seats (407), and nuts (408) are fixedly arranged inside the U-shaped seats (407), and the nuts (408) correspond to the holes of the connecting blocks (405).
9. A muffler according to any one of claims 4 - 8, characterized in that, The first outer shell (401) is fixedly provided with a fixing block (7), and the fixing block (7) is provided with a fixing hole (701).
10. An engine, characterized in that, Comprising a muffler according to any one of claims 1-9.