Silencing device and silencing wheel

Abstract

The utility model belongs to the technical field of automobile accessories, and particularly relates to a silencing device. Comprising an air inlet pipe and a shell, and the air inlet pipe is communicated with the interior of the shell; the shell and the rim form a closed cavity; the shell is combined with air inlet pipes with different parameters; the silencing device is installed on the rim of the tire, the different silencing devices achieve broadband coverage according to different parameters of the air inlet pipe, the problem of tire cavity sound is effectively solved, and the technical problem that in the prior art, the silencing frequency is single is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories, and particularly relates to a muffler. Background Art

[0002] During driving, the gas inside the tire assembly resonates with the road surface, generating tire cavity sound. This noise in the 180-250 Hz frequency range can easily cause passenger discomfort, severely reducing vehicle quality and ride comfort. This problem cannot be completely resolved by designing chassis modal frequency avoidance, vehicle airtightness, or the body acoustic package.

[0003] Currently, most automakers' engineering solutions for addressing tire cavity noise fall into two main directions: First, they affix sound-absorbing foam with varying compositions or structures to the tire's sides to reduce noise. However, since the tire's inner surface is not flat, specialized equipment is required for installation, resulting in low installation efficiency and high costs. Furthermore, if a tire is punctured, repairing the puncture requires partial destruction of the foam, reducing the noise reduction effect.

[0004] Another challenge is fitting a muffler on the rim. Limited space around the rim for muffler installation results in current muffler solutions being small and having a single center frequency. This also creates the risk of breakage and loss during high-mileage vehicle operation, resulting in a loss of muffler effectiveness.

[0005] Therefore, a muffler is needed to solve the above problems. Utility Model Content

[0006] In response to the above problems, the present invention proposes a silencer device, comprising an air intake pipe and a shell, wherein the air intake pipe is connected to the interior of the shell; the shell and the rim form a closed cavity; and the shell is combined with air intake pipes of different parameters.

[0007] Furthermore, the shell includes an arc-shaped top plate, and the arc-shaped top plate is surrounded by a first vertical wall, a second vertical wall, a third vertical wall and a fourth vertical wall to form a semi-enclosed shell, and one end of the vertical wall away from the arc-shaped top plate is sealed to the rim.

[0008] Furthermore, the first vertical wall and the third vertical wall are arranged opposite to each other along the length direction of the arc-shaped top plate; the second vertical wall and the fourth vertical wall are arranged opposite to each other along the width direction of the arc-shaped top plate.

[0009] Furthermore, the length and diameter of the air intake pipe are set according to different resonant center frequencies.

[0010] Furthermore, the air inlet pipe is arranged on the second vertical wall or the fourth vertical wall.

[0011] Furthermore, an inwardly inclined cutout is provided at one end of the air inlet pipe away from the shell.

[0012] Furthermore, the air intake pipe and the housing are connected by threads or are manufactured in one piece.

[0013] Furthermore, the vertical wall and the rim are connected via mounting accessories.

[0014] Furthermore, the installation accessories include a sealing ring and adhesive.

[0015] The utility model provides a silencer wheel, comprising any of the above-mentioned silencer devices, wherein one or more silencer devices are circumferentially arranged on the rim, and the silencer device comprises a first frequency silencer and a second frequency silencer.

[0016] This application achieves broadband coverage and effectively solves the problem of tire cavity sound by installing a silencer on the rim of the tire. Different silencers are installed according to the different parameters of the intake pipe, thereby solving the technical problem of single silencer frequency in the prior art.

[0017] The structural design of the silencer disclosed in the present invention reduces the weight by at least a quarter compared to traditional rim silencers, and adopts convenient connection methods such as adhesion to greatly improve installation efficiency. It also has the advantages of low cost and good maintainability.

[0018] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of the silencer wheel in this application is shown.

[0021] Figure 2 A schematic diagram of the exploded structure of the muffler wheel in this application is shown.

[0022] Figure 3 A schematic cross-sectional view of the rim and the shell in this application is shown.

[0023] Figure 4 A perspective view of the muffler device in this application is shown.

[0024] Figure 5 A top view of the muffler device in this application is shown.

[0025] In the figure, 1. Shell; 2. Rim; 3. No. 1 frequency silencer; 4. No. 2 frequency silencer; 5. Sealed cavity; 6. First vertical wall; 7. Second vertical wall; 8. Third vertical wall; 9. Fourth vertical wall; 10. Arc-shaped top plate; 11. Inlet pipe. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The embodiment of the present application provides a noise reduction device to solve the problem in the prior art that the tire cavity noise generated by the resonance between the internal gas of the tire assembly and the road surface can cause discomfort to the human body. Figure 4 , including an intake pipe 11 and a shell 1, the intake pipe 11 is connected to the inside of the shell 1; the shell 1 and the rim 2 form a closed cavity 5; the shell 1 is combined with intake pipes 11 with different parameters; the outer dimensions of the shell 1 are determined by the groove bottom shape of different types of rims 2, and are designed to match the shape; when the wheel rolls, road excitation will cause the gas inside the tire assembly to vibrate, and the gas enters the closed cavity 5 through the intake pipe 11. The gas resonates in the closed cavity 5, fluctuating repeatedly until it cancels out, eliminating the vibration energy of the gas inside the tire assembly and eliminating the tire cavity sound from the source; the shell 1 is combined with intake pipes 11 with different parameters to cover the tire cavity sounds of different frequencies, maximize the broadband noise reduction effect, and achieve the purpose of eliminating the tire cavity sound.

[0028] In one embodiment, referring to Figure 3 、 4 and 5, the shell 1 includes an arc-shaped top plate 10, and the arc-shaped top plate 10 is surrounded by a first vertical wall 6, a second vertical wall 7, a third vertical wall 8 and a fourth vertical wall 9, forming a semi-enclosed shell 1, and the end of the vertical wall away from the arc-shaped top plate 10 is sealed with the rim 2; the vertical wall and the rim 2 are connected by mounting accessories; the mounting accessories include sealing rings and adhesive backing; a sealing ring is set on the end of the first vertical wall 6, the second vertical wall 7, the third vertical wall 8 and the fourth vertical wall 9 that contacts the rim 2, and the vertical wall, the sealing ring and the bottom of the groove of the rim 2 are connected by glue to achieve sealing; sealing can also be achieved by screwing, and through holes are set on the vertical walls and threaded blind holes are set on the bottom of the groove of the rim 2 to achieve connection; the mounting accessories can also be accessories such as snaps or hoops for connection.

[0029] refer to Figure 5 The first vertical wall 6 and the third vertical wall 8 are relatively arranged along the length direction of the arc-shaped top plate 10; the second vertical wall 7 and the fourth vertical wall 9 are relatively arranged along the width direction of the arc-shaped top plate 10.

[0030] The length and diameter of the intake pipe 11 are set according to different resonant center frequencies; the length and diameter are preset according to the Helmholtz resonator muffler principle to correspond to different resonant center frequencies; Where c is the air sound velocity in the intake pipe 11, d is the inner diameter of the intake pipe 11, x is the correction coefficient, and l is the length of the intake pipe 11. The parameters of the intake pipe 11 are designed based on this formula. By combining the housing 1 with intake pipes 11 of different parameters, broadband coverage is achieved and the problem of tire cavity noise is effectively resolved.

[0031] refer to Figure 4 The air intake pipe 11 is arranged on the second vertical wall 7 or the fourth vertical wall 9; the second vertical wall 7 and the fourth vertical wall 9 are located in the circumferential direction of the rim 2. The air intake pipe 11 is arranged on the second vertical wall 7 or the fourth vertical wall 9 without being blocked by the lateral structure of the tire, so that the gas can enter the sealed cavity 5 through the air intake pipe 11;

[0032] The inlet pipe 11 is provided with an inwardly inclined cutout at one end away from the housing 1. The inwardly inclined cutout is provided to prevent tire sealant or dust from flowing and clogging the inlet pipe 11, thereby avoiding the problem of loss of noise reduction effect caused by clogging of the inlet pipe 11.

[0033] The air intake pipe 11 and the housing 1 are connected by threads or are manufactured in one piece; the threaded connection can be disassembled and replaced, and has a wider range of applications, and the one-piece molding can simplify the overall components.

[0034] The present application also provides a muffler wheel, comprising any of the muffler devices described above, with reference to Figure 1 and Figure 2 , one or more silencers are circumferentially arranged on the rim 2, the above-mentioned silencers include a first frequency silencer 3 and a second frequency silencer 4; Figure 2 For example, one of the silencers is frequency silencer 3, corresponding to center frequency one in the tire cavity sound, and the other silencer is frequency silencer 4, corresponding to center frequency two in the tire cavity sound; two prominent center frequencies will appear in the corresponding frequencies of the tire cavity sound, namely center frequency one and center frequency two; by designing silencers with different resonant center frequencies, single or multiple silencers are arranged around the rim 2 to form a new silencer wheel, thereby achieving the effect of maximizing noise reduction.

[0035] This application achieves broadband coverage and effectively solves the problem of tire cavity sound by installing a silencer on the rim 2 of the tire. Different silencers are installed according to the different parameters of the intake pipe 11, thereby solving the technical problems of low installation efficiency and single silencer frequency in the prior art.

[0036] Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A muffler, characterized in that: The invention comprises an air intake pipe (11) and a shell (1), wherein the air intake pipe (11) is communicated with the interior of the shell (1); the shell (1) and the wheel rim (2) form a closed cavity (5); and the shell (1) is combined with air intake pipes (11) of different parameters.

2. A muffler device according to claim 1, characterized in that: The shell (1) includes an arc-shaped top plate (10), and a first vertical wall (6), a second vertical wall (7), a third vertical wall (8) and a fourth vertical wall (9) are arranged around the arc-shaped top plate (10), forming a semi-enclosed shell (1), and one end of the vertical wall away from the arc-shaped top plate (10) is sealed and connected to the rim (2).

3. A muffler device according to claim 2, characterized in that: The first vertical wall (6) and the third vertical wall (8) are arranged opposite to each other along the length direction of the arc-shaped top plate (10); and the second vertical wall (7) and the fourth vertical wall (9) are arranged opposite to each other along the width direction of the arc-shaped top plate (10).

4. A muffler device according to claim 3, characterized in that: The length and diameter of the air inlet pipe (11) are set according to different resonance center frequencies.

5. A muffler device according to claim 4, characterized in that: The air inlet pipe (11) is arranged on the second vertical wall (7) or the fourth vertical wall (9).

6. A muffler device according to claim 5, characterized in that: An inwardly inclined cutout is provided at one end of the air inlet pipe (11) away from the housing (1).

7. A muffler device according to claim 6, characterized in that: The air intake pipe (11) and the housing (1) are connected by threads or are manufactured as one piece.

8. A muffler device according to claim 2, characterized in that: The vertical wall and the wheel rim (2) are connected via mounting accessories.

9. A muffler device according to claim 8, characterized in that: The installation accessories include a sealing ring and adhesive.

10. A muffler wheel, characterized in that: The invention comprises the silencer device according to any one of claims 1 to 9, wherein one or more silencers are circumferentially arranged on the rim (2), and the silencer device comprises a first frequency silencer (3) and a second frequency silencer (4).

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