A vibration reduction and noise reduction structure for an exhaust pipe

Abstract

The utility model discloses a vibration reduction and noise reduction structure for an exhaust pipe, comprising a vibration reduction and noise reduction component installed at the outlet end of the exhaust pipe, wherein the vibration reduction and noise reduction component comprises a metal ring embedded in the inner periphery of the outlet end of the exhaust pipe, and a non-metallic vibration reduction part is press-fitted on the inner periphery of the metal ring; the installation structure of the utility model is simple and reliable, does not need to occupy additional installation space, and changes the internal resonance frequency of the exhaust pipe. Through the simple structure, a good vibration reduction and noise reduction effect of the exhaust pipe is achieved, and the utility model is very suitable for promotion and application.

Description

Technical Field

[0001] The utility model belongs to the field of automobile exhaust pipe manufacturing, and in particular relates to a vibration reduction and noise reduction structure of the exhaust pipe. Background Art

[0002] In the automotive field, the exhaust pipe is one of the main sources of vibration and noise for the entire vehicle, so its performance in vibration reduction and noise reduction directly determines the overall comfort of the vehicle. In the prior art, a vibration reduction installation structure is usually set on the periphery of the exhaust pipe, which is relatively complex and occupies a large installation volume; some other proposals propose to set more special-shaped structures inside the exhaust pipe to achieve vibration reduction installation, but the processing cost is relatively high.

[0003] Therefore, the applicant hopes to seek technical solutions to improve the above technical problems. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a vibration reduction and noise reduction structure for an exhaust pipe. The installation structure is simple and reliable, does not require additional installation space, and changes the internal resonance frequency of the exhaust pipe. Through the simple structure, good vibration reduction and noise reduction effects are achieved for the exhaust pipe, which is very suitable for promotion and application.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A vibration-damping and noise-reducing structure for an exhaust pipe comprises a vibration-damping and noise-reducing assembly installed at an exhaust pipe outlet end, wherein the vibration-damping and noise-reducing assembly comprises a metal ring embedded in the inner periphery of the exhaust pipe outlet end, and a non-metallic vibration-damping part is press-fitted on the inner periphery of the metal ring.

[0007] Preferably, the exhaust pipe outlet end includes a limiting step located on the inner side and a limiting groove located on the outer side, and a pipe body section of the exhaust pipe outlet end is provided between the limiting step and the limiting groove; wherein, one end of the metal ring is embedded in the limiting groove, and the other end thereof is limitedly matched with the limiting step; the outer periphery of the metal ring is tightly fitted with the inner periphery of the pipe body section of the exhaust pipe outlet end.

[0008] Preferably, the depth of the limit slot is in the range of 1-2.5 mm.

[0009] Preferably, the outer periphery of the exhaust pipe outlet end corresponding to the position of the limiting step is in a groove shape, and the groove depth ranges from 0.8 to 2 mm.

[0010] Preferably, the spacing between the limiting step and the limiting slot is in the range of 3.5-7 mm.

[0011] Preferably, the non-metallic vibration damper comprises a metal frame, and a non-metallic vibration damper body is integrally molded on the metal frame, wherein the metal frame and the metal ring are made of the same material.

[0012] Preferably, the non-metallic vibration damping component body is made of rubber or silicone, and the metal frame is made of stainless steel.

[0013] Preferably, the metal skeleton comprises a metal skeleton ring pressed on the inner periphery of the metal ring, and a metal skeleton seat integrally connected to the metal skeleton ring, wherein the metal skeleton seat is provided with a plurality of exhaust holes.

[0014] Preferably, the wall thickness of the exhaust pipe outlet end is smaller than the wall thickness of the metal ring and larger than the wall thickness of the metal skeleton.

[0015] Preferably, the wall thickness of the exhaust pipe outlet end is in the range of 1.3-2.2 mm, the wall thickness of the metal ring is in the range of 2-3.5 mm, and the wall thickness of the metal skeleton is in the range of 0.6-1.4 mm.

[0016] Instead of setting up a complicated vibration-damping and noise-absorbing installation structure on the outside of the exhaust pipe as used in the prior art, the present application proposes to directly install a specific vibration-damping and noise-absorbing assembly on the exhaust pipe outlet end. The vibration-damping and noise-absorbing assembly consists of a metal ring embedded in the inner periphery of the exhaust pipe outlet end and a non-metallic vibration-damping part pressed on the inner periphery of the metal ring. The installation structure is simple and reliable, and does not require additional installation space. In addition, the non-metallic vibration-damping part (made of silicone or rubber material) changes the internal resonance frequency of the exhaust pipe. Through this simple structure, a good vibration-damping and noise-absorbing effect is achieved on the exhaust pipe, which is very suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the vibration reduction and noise reduction structure of the lower exhaust pipe in a specific implementation mode of the utility model;

[0018] Figure 2 Yes Figure 1 Schematic diagram of the structure after rotating a certain angle;

[0019] Figure 3 yes Figure 2 Section view in AA direction;

[0020] Figure 4 Yes Figure 1 Schematic diagram of the structure after rotating to another certain angle;

[0021] Figure 5 It is a schematic diagram of the exploded structure of the vibration reduction and noise reduction structure of the lower exhaust pipe in a specific implementation mode of the utility model;

[0022] Figure 6 yes Figure 3A magnified view of the local structure. DETAILED DESCRIPTION

[0023] The utility model embodiment discloses a vibration reduction and noise reduction structure of an exhaust pipe, including a vibration reduction and noise reduction component installed at the outlet end of the exhaust pipe, wherein the vibration reduction and noise reduction component includes a metal ring embedded in the inner periphery of the outlet end of the exhaust pipe, and a non-metallic vibration reduction part is press-fitted on the inner periphery of the metal ring.

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a vibration damping and noise reduction structure of an exhaust pipe includes a vibration damping and noise reduction component 2 installed at an exhaust pipe outlet end 1, wherein the vibration damping and noise reduction component 2 includes a metal ring 21 embedded in the inner periphery of the exhaust pipe outlet end, and a non-metallic vibration damping part 22 is press-fitted on the inner periphery of the metal ring 21.

[0026] Preferably, in order to ensure the stability and strength of the installation, in the present embodiment, the exhaust pipe outlet end 1 includes a limiting step 11 located on the inner side and a limiting groove 12 located on the outer side, and an exhaust pipe outlet end tube body section 1a is provided between the limiting step 11 and the limiting groove 12; wherein, one end of the metal ring 21 is embedded in the limiting groove 12, and the other end thereof is limitedly matched with the limiting step 11; the outer periphery of the metal ring 21 is tightly fitted with the inner periphery of the exhaust pipe outlet end tube body section 1a; further preferably, in the present embodiment, the groove depth range of the limiting groove 12 is 1-2.5mm; the outer periphery of the exhaust pipe outlet end 1 corresponding to the limiting step position is groove-shaped (i.e., a groove 13 is formed), and the groove depth range of the groove 13 is 0.8-2mm; the spacing range between the limiting step 11 and the limiting groove 12 is 3.5-7mm.

[0027] Preferably, in order to further ensure the structural strength and effectively change the resonance frequency inside the exhaust pipe, in the present embodiment, the non-metallic vibration damper 22 includes a metal frame (integrally coated with the non-metallic vibration damper body (the coating thickness range of the non-metallic vibration damper body is recommended to be 2-3mm), so the figure does not show that the shape of the metal frame is the same as the non-metallic vibration damper 22), and the non-metallic vibration damper body 22a is integrally coated on the metal frame, wherein the metal frame and the metal ring 21 are made of the same material; further preferably, in the present embodiment, the material of the non-metallic vibration damper body 22a is rubber or silicone (it has been verified in practice that when silicone is used as an implementation method, the vibration reduction and noise reduction effect is better, so it is recommended to use silicone, and silicone is specifically used in this embodiment), and the material of the metal frame is stainless steel.

[0028] Preferably, in this embodiment, the metal skeleton includes a metal skeleton ring pressed on the inner circumference of the metal ring, and a metal skeleton seat integrally connected to the metal skeleton ring, wherein a plurality of exhaust holes are provided on the metal skeleton seat.

[0029] Further preferably, in order to ensure the structural installation strength and achieve more prominent vibration reduction and noise reduction effects, in the present embodiment, the wall thickness of the exhaust pipe outlet end 1 is smaller than the wall thickness of the metal ring 21 and larger than the wall thickness of the metal frame; specifically preferably, in the present embodiment, the wall thickness range of the exhaust pipe outlet end 1 is 1.3-2.2mm, the wall thickness range of the metal ring 21 is 2-3.5mm, and the wall thickness range of the metal frame is 0.6-1.4mm, and more preferably 0.6-0.9mm.

[0030] The present embodiment proposes to directly install a specific vibration-damping and noise-absorbing component at the exhaust pipe outlet end. The vibration-damping and noise-absorbing component consists of a metal ring embedded in the inner periphery of the exhaust pipe outlet end and a non-metallic vibration-damping part pressed on the inner periphery of the metal ring. The installation structure is simple and reliable, and does not require additional installation space. In addition, it has been verified through actual tests that the non-metallic vibration-damping part coated with silicone material can effectively change the internal resonance frequency of the exhaust pipe. Through this simple and low-cost structure, a good vibration-damping and noise-absorbing effect is achieved for the exhaust pipe. There is no need to set a complex and volume-intensive vibration-damping and noise-absorbing installation structure on the outside of the exhaust pipe, and the structure is very suitable for promotion and application.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vibration reduction and noise reduction structure for an exhaust pipe, characterized in that: The invention comprises a vibration-damping and noise-reducing component installed at the outlet end of an exhaust pipe, wherein the vibration-damping and noise-reducing component comprises a metal ring embedded in the inner periphery of the outlet end of the exhaust pipe, and a non-metal vibration-damping part is pressed on the inner periphery of the metal ring.

2. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 1, characterized in that: The exhaust pipe outlet end includes a limiting step located on the inner side and a limiting slot located on the outer side, and a pipe body section of the exhaust pipe outlet end is provided between the limiting step and the limiting slot; wherein one end of the metal ring is embedded in the limiting slot, and the other end thereof is limitedly matched with the limiting step; the outer periphery of the metal ring is tightly fitted with the inner periphery of the pipe body section of the exhaust pipe outlet end.

3. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 2, characterized in that: The depth of the limit slot is in the range of 1-2.5 mm.

4. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 2, characterized in that: The outer periphery of the exhaust pipe outlet end corresponding to the position of the limiting step is in a groove shape, and the groove depth ranges from 0.8 to 2 mm.

5. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 2, characterized in that: The spacing between the limiting step and the limiting slot is in the range of 3.5-7 mm.

6. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 1, characterized in that: The non-metal vibration damper comprises a metal frame, and a non-metal vibration damper body is integrally molded on the metal frame, wherein the metal frame and the metal ring are made of the same material.

7. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 6, characterized in that: The non-metallic vibration damping component body is made of rubber or silicone, and the metal frame is made of stainless steel.

8. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 6, characterized in that: The metal skeleton comprises a metal skeleton ring which is pressed on the inner periphery of the metal ring, and a metal skeleton seat which is integrally connected with the metal skeleton ring, wherein the metal skeleton seat is provided with a plurality of exhaust holes.

9. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 6, characterized in that: The wall thickness of the exhaust pipe outlet end is smaller than the wall thickness of the metal ring and larger than the wall thickness of the metal skeleton.

10. The vibration reduction and noise reduction structure of the exhaust pipe according to claim 9, characterized in that: The wall thickness of the exhaust pipe outlet end is in the range of 1.3-2.2 mm, the wall thickness of the metal ring is in the range of 2-3.5 mm, and the wall thickness of the metal skeleton is in the range of 0.6-1.4 mm.

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