Silencer

Abstract

A silencer comprises a shell, a first baffle and a second baffle. The shell comprises a first cavity located on the side, away from the second baffle, of the first baffle, a second cavity located on the side, away from the first baffle, of the second baffle, and a third cavity located between the first baffle and the second baffle. The silencer further comprises an air inlet pipe and an air outlet pipe, wherein at least part of the air inlet pipe penetrates through the first baffle and extends into the third cavity, and at least part of the air outlet pipe penetrates through the second baffle and extends into the third cavity. The silencer further comprises a surrounding type partition plate located in the third cavity, the surrounding type partition plate comprises an inner cavity, and the part, extending into the third cavity, of the air inlet pipe and the part, extending into the third cavity, of the air outlet pipe are located in the inner cavity. The silencer comprises silencing cotton which is arranged in the third cavity in a filling mode and located on the outer portion of the surrounding type partition plate. By means of the arrangement, the acoustic performance of the silencer is improved, and meanwhile it is guaranteed that the silencing cotton is not blown away.

Description

Technical Field

[0001] The present invention relates to a muffler, belonging to the technical field of engine exhaust systems. Background Art

[0002] The mufflers in related technologies generally include a housing and a core tube located in the housing. The core tube includes an intake pipe and an outlet pipe. In the area where the intake pipe and the outlet pipe meet, sound-absorbing cotton cannot be filled because the sound-absorbing cotton is easily blown away by the airflow of the intake pipe and / or the outlet pipe.

[0003] However, with the continuous improvement of the acoustic performance of mufflers, how to reasonably design the area where the intake pipe and the outlet pipe meet so as to be able to fill sound-absorbing cotton is a technical problem faced by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a muffler with better acoustic performance.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A muffler includes a housing, a first baffle located in the housing, and a second baffle located in the housing and spaced apart from the first baffle. The housing includes a first cavity on a side of the first baffle away from the second baffle, a second cavity on a side of the second baffle away from the first baffle, and a third cavity between the first baffle and the second baffle; the muffler further includes an intake pipe that at least partially passes through the first baffle and extends into the third cavity and an outlet pipe that at least partially passes through the second baffle and extends into the third cavity; the muffler further includes a surrounding partition located in the third cavity. The surrounding partition includes an inner cavity. The parts of the intake pipe and the outlet pipe that extend into the third cavity are located in the inner cavity. The muffler includes sound-absorbing cotton filled in the third cavity and located outside the surrounding partition.

[0006] As a further improved technical solution of the present invention, the surrounding partition includes a first protruding portion on one side and a second protruding portion on the other side. The first baffle is provided with a first installation groove that cooperates with the first protruding portion, and the second baffle is provided with a second installation groove that cooperates with the second protruding portion.

[0007] As a further improved technical solution of the present invention, the first protruding portion is fixedly welded to the first baffle, and the second protruding portion is fixedly welded to the second baffle.

[0008] As a further improved technical solution of the present invention, the surrounding partition is provided with a plurality of communication holes penetrating its wall surface, and the plurality of communication holes communicate the third cavity with the inner cavity.

[0009] As a further improved technical solution of the present invention, the surrounding partition includes a first partition and a second partition, and the first partition and the second partition are spliced together.

[0010] As a further improved technical solution of the present invention, both the first partition and the second partition are U-shaped.

[0011] As a further improved technical solution of the present invention, the housing includes a first housing and a second housing fixedly welded to the first housing.

[0012] As a further improved technical solution of the present invention, the openings of the part of the intake pipe extending into the third cavity are not aligned with the openings of the part of the exhaust pipe extending into the third cavity.

[0013] As a further improved technical solution of the present invention, the muffler includes a first sound-absorbing cotton filled in the first cavity.

[0014] As a further improved technical solution of the present invention, the muffler further includes a second sound-absorbing cotton filled in the second cavity.

[0015] Compared with the prior art, the muffler of the present invention further includes a surrounding partition located in the third cavity. The surrounding partition includes an inner cavity, and the parts of the intake pipe and the exhaust pipe extending into the third cavity are located in the inner cavity. The muffler includes a sound-absorbing cotton filled in the third cavity and located outside the surrounding partition. The surrounding partition separates the sound-absorbing cotton from the intake pipe and the exhaust pipe, while improving the acoustic performance and ensuring that the sound-absorbing cotton is not blown away. Description of the Drawings

[0016] Figure 1 is a three-dimensional exploded view of the muffler of the present invention in one embodiment.

[0017] Figure 2 is a three-dimensional schematic view of the muffler of the present invention after removing the first housing.

[0018] Figure 3 is Figure 2 a three-dimensional exploded view of the surrounding partition in

[0019] Figure 4 is a bottom view of the muffler of the present invention after removing the second housing. Detailed Embodiments

[0020] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Among them, if there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description involves the accompanying drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary specific embodiments does not represent all embodiments of the present invention. On the contrary, they are only examples of products that are consistent with those recorded in the claims of the present invention.

[0021] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present invention. It should be understood that the terms such as "first", "second" and similar words used in the description and claims of the present invention do not represent any order, quantity or importance, but are only used to distinguish the named features.

[0022] Please refer to Figures 1 to 4 As shown, the present invention discloses a muffler, which includes a housing 1, a first baffle 21 located in the housing 1, and a second baffle 22 located in the housing 1 and spaced apart from the first baffle 21.

[0023] In the illustrated embodiment of the present invention, the housing 1 includes a first housing 11 (such as an upper housing) and a second housing 12 (such as a lower housing) welded and fixed to the first housing 11.

[0024] The housing 1 includes a first cavity 101 on the side of the first baffle 21 away from the second baffle 22, a second cavity 102 on the side of the second baffle 22 away from the first baffle 21, and a third cavity 103 between the first baffle 21 and the second baffle 22.

[0025] The muffler further includes an intake pipe 31 at least partially passing through the first baffle 21 and extending into the third cavity 103 and an exhaust pipe 32 at least partially passing through the second baffle 22 and extending into the third cavity 103. In the illustrated embodiment of the present invention, the opening 311 of the portion of the intake pipe 31 extending into the third cavity 103 is not aligned with the opening 321 of the portion of the exhaust pipe 32 extending into the third cavity 103.

[0026] The silencer further includes a surrounding partition 4 located in the third cavity 103. The surrounding partition 4 includes an inner cavity 40. The portions of the intake pipe 31 and the exhaust pipe 32 extending into the third cavity 103 are located in the inner cavity 40. The silencer includes sound-absorbing cotton 53 filled in the third cavity 103 and located outside the surrounding partition 4. The surrounding partition 4 is provided with a plurality of communication holes 401 penetrating through its wall surface, and the plurality of communication holes 401 communicate the third cavity 103 with the inner cavity 40.

[0027] In the illustrated embodiment of the present invention, the surrounding partition 4 includes a first convex portion 41 located on one side and a second convex portion 42 located on the other side. The first baffle 21 is provided with a first mounting groove 211 that cooperates with the first convex portion 41. The second baffle 22 is provided with a second mounting groove 221 that cooperates with the second convex portion 42. In the illustrated embodiment of the present invention, the first convex portion 41 is fixedly welded to the first baffle 21, and the second convex portion 42 is fixedly welded to the second baffle 22.

[0028] In the illustrated embodiment of the present invention, the surrounding partition 4 includes a first partition 43 and a second partition 44, and the first partition 43 and the second partition 44 are spliced together. Both the first partition 43 and the second partition 44 are U-shaped.

[0029] To improve the acoustic performance, the silencer includes first sound-absorbing cotton 51 filled in the first cavity 101 and second sound-absorbing cotton 52 filled in the second cavity 102.

[0030] Compared with the prior art, the silencer of the present invention includes a surrounding partition 4 located in the third cavity 103. The surrounding partition 4 includes an inner cavity 40. The portions of the intake pipe 31 and the exhaust pipe 32 extending into the third cavity 103 are located in the inner cavity 40. The silencer includes sound-absorbing cotton 53 filled in the third cavity 103 and located outside the surrounding partition 4. The surrounding partition 4 separates the sound-absorbing cotton 53 from the intake pipe 31 and the exhaust pipe 32, while improving the acoustic performance and ensuring that the sound-absorbing cotton 53 is not blown away.

[0031] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art. Although this specification has described the present invention in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the art can still modify the present invention or make equivalent substitutions, and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A silencer, characterized in that, It includes a housing, a first baffle located in the housing, and a second baffle located in the housing and spaced from the first baffle. The housing includes a first cavity on one side of the first baffle away from the second baffle, a second cavity on one side of the second baffle away from the first baffle, and a third cavity between the first baffle and the second baffle; the silencer further includes an intake pipe at least partially passing through the first baffle and extending into the third cavity and an exhaust pipe at least partially passing through the second baffle and extending into the third cavity; the silencer further includes a surrounding partition located in the third cavity, the surrounding partition includes an inner cavity, and the parts of the intake pipe and the exhaust pipe extending into the third cavity are located in the inner cavity. The silencer includes sound-absorbing cotton filled in the third cavity and outside the surrounding partition.

2. The silencer according to claim 1, characterized in that: The surrounding partition includes a first protrusion on one side and a second protrusion on the other side. The first baffle is provided with a first installation groove matching with the first protrusion, and the second baffle is provided with a second installation groove matching with the second protrusion.

3. The silencer according to claim 2, characterized in that: The first protrusion is fixedly welded to the first baffle, and the second protrusion is fixedly welded to the second baffle.

4. The silencer according to claim 1, characterized in that: The surrounding partition is provided with a plurality of communication holes penetrating its wall surface, and the plurality of communication holes communicate the third cavity with the inner cavity.

5. The silencer according to claim 1, characterized in that: The surrounding partition includes a first partition and a second partition, and the first partition and the second partition are spliced together.

6. The silencer according to claim 5, characterized in that: Both the first partition and the second partition are U-shaped.

7. The silencer according to claim 1, characterized in that: The housing includes a first housing and a second housing fixedly welded to the first housing.

8. The silencer according to claim 1, characterized in that: The openings of the part of the intake pipe extending into the third cavity are not aligned with the openings of the part of the exhaust pipe extending into the third cavity.

9. The silencer according to claim 1, characterized in that: The silencer includes first sound-absorbing cotton filled in the first cavity.

10. The silencer according to claim 1, characterized in that: The silencer further includes second sound-absorbing cotton filled in the second cavity.

Images