Novel air inlet silencer

Abstract

The utility model provides a novel air inlet silencer which comprises an upper shell and a lower shell which are in butt joint up and down, a sealed resonant cavity is formed between the upper shell and the lower shell, a first pipe body is arranged in the resonant cavity in a clamped mode, an air inlet and an air outlet are formed in the side walls of the two sides of the lower shell respectively, and the air inlet and the air outlet are communicated with the resonant cavity. The two ends of the first pipe body are in butt joint with the air inlet and the air outlet respectively, a second pipe body is fixedly connected to the middle of the first pipe body, a port in one end of the second pipe body is connected to the side wall of the first pipe body and communicated with the interior of the first pipe body, and a port in the other end of the second pipe body is located in the resonant cavity. The first pipe body, the second pipe body and the resonant cavity form a Helmholtz resonance silencing structure. The resonant cavity with a large volume is formed by the upper shell and the lower shell, and the Helmholtz resonance silencing structure for low-frequency noise is formed by combining the first pipe body and the second pipe body, so that the requirements of the prior art are met.

Description

Technical Field

[0001] The utility model relates to a muffler, in particular to a novel intake muffler. Background Art

[0002] A muffler generally includes a pipe body, and structures for sound absorption or noise elimination are arranged inside and outside the side wall of the pipe body, so as to reduce the noise of the intake air. At present, a muffler with a large volume needs to be installed in an automobile engine compartment and is used to eliminate low-frequency noise, and the existing tubular muffler cannot meet the requirements. Content of the Utility Model

[0003] In view of the requirements in the prior art, the utility model provides a novel intake muffler, aiming to eliminate low-frequency noise in the intake pipeline.

[0004] A novel intake muffler includes an upper shell and a lower shell which are butt-jointed up and down, and a sealed resonance cavity is formed between the upper shell and the lower shell. A first pipe body is clamped and arranged in the resonance cavity. An air inlet and an air outlet are respectively arranged on the two side walls of the lower shell. Two ends of the first pipe body are respectively butted with the air inlet and the air outlet. A second pipe body is fixedly connected to the middle of the first pipe body. One end port of the second pipe body is connected to the side wall of the first pipe body and is communicated with the inside of the first pipe body. The other end port of the second pipe body is located in the resonance cavity. The first pipe body, the second pipe body and the resonance cavity form a Helmholtz resonance sound absorption structure.

[0005] Further: the air inlet and the air outlet are respectively located on the opposite side walls of the lower shell.

[0006] Further: the first pipe body is horizontally arranged in the lower shell, and the second pipe body is vertically arranged in the lower shell.

[0007] Further: vertical plug connectors are fixedly arranged at both ends of the first pipe body, and slots are arranged at the corresponding positions of the plug connectors in the lower shell. The plug connectors are inserted into the corresponding slots. Positioning members are fixedly arranged on the inner wall of the upper shell at the positions corresponding to the first pipe body, and the positioning members abut against the upper part of the outer wall of the first pipe body from top to bottom.

[0008] Further: the plug connectors are made of plates and are located at the ports of the first pipe body, and the slots are located on the side walls of the lower shell and at the corresponding air inlets or air outlets.

[0009] Further: a first strip groove is fixedly provided on the top wall at one end of the first tube body, and the long direction of the first strip groove is consistent with the long direction of the first tube body; a second strip groove is fixedly provided on the top wall at the other end of the first tube body, and the long direction of the second strip groove is perpendicular to the long direction of the first tube body; the positioning member includes a first positioning plate and a second positioning plate, both of which are vertical, the first positioning plate corresponds to the first strip groove up and down, the lower part of the first positioning plate matches the first strip groove and is inserted into it, the second positioning plate corresponds to the second strip groove up and down, the lower part of the second positioning plate matches the second strip groove and is inserted into it.

[0010] Furthermore, the first tube body and the second tube body are integrally arranged and are both made of hard plastic.

[0011] In order to facilitate compact arrangement with other mechanisms in the engine compartment of the automobile, the bottom wall of the lower shell is further recessed into the resonance cavity and a clearance groove is formed on the bottom surface thereof.

[0012] Furthermore, fixing ear plates are integrally arranged on the outer walls on two opposite sides of the lower shell.

[0013] Further, after the upper shell and the lower shell are butt-jointed, the butt joints of the two are welded.

[0014] The beneficial effects of the utility model are as follows: a resonance cavity with a larger volume is formed by the upper and lower shells, and a Helmholtz resonance silencing structure for low-frequency noise is formed in combination with the first tube body and the second tube body, thereby meeting the needs of the prior art; the first tube body and the second tube body are integrated, and after the upper and lower shells are injection molded respectively, the first tube body is clamped and positioned between the upper and lower shells, so that the utility model is easy to produce and assemble, and has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the first tube body in the utility model;

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the lower shell body in the utility model. DETAILED DESCRIPTION

[0019] The following will describe the present utility model in detail with reference to the accompanying drawings. The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as limiting the present utility model. The orientation terms such as left, middle, right, up, and down in the embodiments of the present utility model are only relative concepts to each other or are referenced based on the normal use state of the product, and should not be considered as restrictive.

[0020] A novel intake muffler, as Figure 1 and Figure 2 shown, includes an upper housing 2 and a lower housing 1 that are butt-jointed up and down. After the upper housing 2 and the lower housing 1 are butt-jointed, the butt-joint seam between the two is welded, and a sealed resonance cavity is formed between the upper housing 2 and the lower housing 1. A first pipe body 3 is clamped and arranged in the resonance cavity. An air inlet 11 and an air outlet 12 are respectively arranged on the two side walls of the lower housing 1. The two ends of the first pipe body 3 are respectively butted against the air inlet 11 and the air outlet 12. A second pipe body 31 is fixedly connected to the middle of the first pipe body 3. One end port of the second pipe body 31 is connected to the side wall of the first pipe body 3 and is communicated with the inside of the first pipe body 3. The other end port of the second pipe body 31 is located in the resonance cavity. The first pipe body 3, the second pipe body 31, and the resonance cavity form a Helmholtz resonance sound-absorbing structure. The first pipe body 3 and the second pipe body 31 are integrally arranged and the materials of both are rigid plastics such as PP-GF30 and PA6-GF30.

[0021] Among them, the air inlet 11 and the air outlet 12 are respectively located on the opposite side walls of the lower housing 1. Specifically, the air inlet 11 and the air outlet 12 are respectively located on the left and right side walls of the lower housing 1, so that the long direction of the first pipe body 1 is arranged along the left and right directions, the long direction of the second pipe body 31 is arranged in the front and back directions, the front side wall of the lower housing 1 is close to the first pipe body 3, and the rear side wall of the lower housing 1 is far from the free end port of the second pipe body 31; so that the first pipe body 3 is horizontally arranged in the lower housing 1, and the second pipe body 31 is vertically arranged in the lower housing 1.

[0022] To facilitate the clamping and positioning of the first pipe body 3 in the lower housing 1, vertical plug-in parts 32 are fixedly arranged at both ends of the first pipe body 3. Slots 14 are arranged at the positions corresponding to the plug-in parts 32 in the lower housing 1. The plug-in parts 32 are inserted into the corresponding slots 14. The plug-in parts 32 are made of plates and are located at the ports of the first pipe body 3. The slots 14 are located on the side walls of the lower housing 1 and are located at the corresponding air inlets 11 or air outlets 12. A positioning part is fixedly arranged on the inner wall of the upper housing 2 at the position corresponding to the first pipe body 3. The positioning part abuts against the upper part of the outer wall of the first pipe body 3 from top to bottom, so as to position the first pipe body 3 between the air inlet 11 and the air outlet 12; combined with Figure 3 andFigure 4 As shown, a first strip groove 33 is fixedly provided on the top wall at one end of the first tube body 3, and the long direction of the first strip groove 33 is consistent with the long direction of the first tube body 3; a second strip groove 34 is fixedly provided on the top wall at the other end of the first tube body 3, and the long direction of the second strip groove 34 is perpendicular to the long direction of the first tube body 3; the positioning member includes a first positioning plate 21 and a second positioning plate 22, both of which are vertical, the first positioning plate 21 corresponds to the first strip groove 33 up and down, the lower part of the first positioning plate 21 matches the first strip groove 33 and is inserted therein, the second positioning plate 22 corresponds to the second strip groove 34 up and down, the lower part of the second positioning plate 22 matches the second strip groove 33 and is inserted therein, thereby preventing the first tube body 3 from shaking in all directions in the resonance cavity.

[0023] In addition, in order to facilitate compact arrangement with other mechanisms in the automobile engine compartment, the bottom wall of the lower shell 1 is recessed into the resonance cavity and a clearance groove is formed on its bottom surface; fixed ear plates 13 are integrally provided on the outer walls on opposite sides of the lower shell 1.

[0024] During operation, air flows in from the air inlet 11 and is discharged from the air outlet 12 after passing through the first tube body 3; when the air flows through the first tube body 3, the resonance cavity, the second tube body 31 and the first tube body 3 form a resonance system, which can strongly absorb or reflect sound waves of a specific frequency, thereby eliminating or weakening noise of a specific frequency in the air flow.

[0025] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of air intake muffler, characterized by: The utility model comprises an upper shell and a lower shell which are butted together, and a sealed resonance cavity is formed between the upper shell and the lower shell, a first tube body is clamped in the resonance cavity, an air inlet and an air outlet are respectively arranged on the side walls of the lower shell, two ends of the first tube body are butted with the air inlet and the air outlet respectively, a second tube body is fixedly connected to the middle of the first tube body, one end port of the second tube body is connected to the side wall of the first tube body and communicated with the interior of the first tube body, and the other end port of the second tube body is located in the resonance cavity, and the first tube body, the second tube body and the resonance cavity form a Helmholtz resonance silencing structure.

2. The novel intake muffler according to claim 1 is characterized in that: The air inlet and the air outlet are respectively located on the opposite side walls of the lower shell.

3. The novel intake muffler according to claim 2 is characterized in that: The first tube body is arranged transversely in the lower shell body, and the second tube body is arranged longitudinally in the lower shell body.

4. The novel intake muffler according to claim 1, 2 or 3, characterized in that: Vertical connectors are fixedly provided at both ends of the first tube body, and slots are provided in the lower shell at positions corresponding to the connectors, and the connectors are plugged into the corresponding slots; a positioning piece is fixedly provided on the inner wall of the upper shell at a position corresponding to the first tube body, and the positioning piece abuts against the upper part of the outer wall of the first tube body from top to bottom.

5. The novel intake muffler according to claim 4 is characterized in that: The plug-in connector is a plate and is located at the end of the first tube body, and the slot is located on the side wall of the lower shell and at the corresponding air inlet or outlet.

6. The novel intake muffler according to claim 4 is characterized in that: A first strip groove is fixedly provided on the outside of the top wall at one end of the first tube body, and the long direction of the first strip groove is consistent with the long direction of the first tube body; a second strip groove is fixedly provided on the outside of the top wall at the other end of the first tube body, and the long direction of the second strip groove is perpendicular to the long direction of the first tube body; the positioning member includes a first positioning plate and a second positioning plate, both of which are vertical, the first positioning plate corresponds to the first strip groove up and down, the lower part of the first positioning plate matches the first strip groove and is inserted into it, the second positioning plate corresponds to the second strip groove up and down, the lower part of the second positioning plate matches the second strip groove and is inserted into it.

7. The novel intake muffler according to claim 1 is characterized in that: The first tube body and the second tube body are integrated and are made of hard plastic.

8. The novel air intake muffler according to claim 1 is characterized in that: The bottom wall of the lower shell is recessed into the resonance cavity and a clearance groove is formed on the bottom surface thereof.

9. The novel intake muffler according to claim 1 is characterized in that: Fixed ear plates are integrally arranged on the outer walls on opposite sides of the lower shell.

10. The novel intake muffler according to claim 1 is characterized in that: After the upper shell and the lower shell are butted, the butt seams of the two are welded.

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