Heat shield of automobile silencer

Abstract

The utility model discloses a heat shield for an automobile silencer, which relates to the technical field of automobile silencers and comprises a heat shield body, a silencer body is arranged in the heat shield body, a heat insulation component is arranged in the heat shield body, and radiating fins are arranged on the inner wall of the heat shield body. The silencer has the advantages that the silencer body and the heat insulation assembly can be protected through the arrangement of the heat insulation cover body, and heat generated by the silencer body can be prevented from being transmitted outwards through the internal structure of the heat insulation assembly through the arrangement of the heat insulation assembly; the arrangement of the heat dissipation fins and the heat dissipation grooves can increase the heat dissipation area of the equipment to promote air circulation and assist the silencer body in heat dissipation, the arrangement of the connecting flange and the sealing cover can seal the heat insulation cover body to prevent heat from being transmitted through gaps, and the arrangement of the fixing assembly can fix the silencer body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile muffler, especially a heat shield for automobile muffler. BACKGROUND

[0002] The automobile muffler is used to reduce the noise generated by the engine of the motor vehicle, and the length difference of the two pipes is equal to half of the wavelength of the sound wave emitted by the automobile, so that the two sound waves are weakened by interference and mutual cancellation when superimposed, thereby reducing the sound, and the effect of sound reduction is achieved.

[0003] The automobile muffler is an important part of the exhaust system, and its main function is to reduce the engine exhaust noise and improve the driving comfort. However, the muffler will generate high temperature during operation, and the surface temperature can reach several hundred degrees Celsius, which not only poses a risk of thermal damage to the surrounding parts, but also may cause safety hazards. At the same time, the high temperature environment will also accelerate the thermal aging of the materials of the muffler itself, shortening the service life. Therefore, a heat shield for automobile muffler is needed to insulate the muffler. However, the existing muffler insulation measures usually use the method of wrapping insulation cotton, which has the problems of low insulation efficiency, easy aging and falling off, and the performance of the insulation cotton will degrade in a long-term high-temperature environment, which cannot effectively block the transfer of heat energy. Moreover, the existing heat shield is usually directly covered on the surface of the muffler, and when the muffler generates heat, although the heat shield can insulate the automobile muffler, the heat is not dissipated, and will accumulate between the automobile muffler and the heat shield, resulting in higher temperature. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A heat shield for automobile muffler, comprising a heat shield body, an inside of the heat shield body is provided with a muffler body, an inside of the heat shield body is provided with a heat insulation assembly, an inner wall of the heat shield body is provided with a heat dissipation fin, the inner wall of the heat shield body is provided with a plurality of groups of heat dissipation grooves, the top of the connecting flange is fixed with a sealing cover, the top of the sealing cover is provided with a fixing assembly for fixing the muffler body;

[0007] The heat insulation assembly comprises an inner cylinder fixed to the inner wall of the heat insulation cover body, and the inner wall of the inner cylinder is attached to the outer side of the muffler body, the inner wall of the inner cylinder is provided with a heat insulation cylinder, and the heat insulation cylinder is made of ceramic fiber, and the inner wall of the heat insulation cylinder is provided with a vacuum interlayer.

[0008] As a preferred scheme of the automobile muffler heat insulation cover, the fixing assembly comprises a fixing ring fixed to the top of the sealing cover, and the inner wall of the fixing ring is slidably connected to the outer side of the muffler body, and the inner wall of the fixing ring is threadedly connected with a plurality of groups of first bolts.

[0009] As a preferred scheme of the automobile muffler heat insulation cover, the inner wall of the heat insulation cover body is provided with three groups of sealing rings, and the sizes of the three groups of sealing rings are the same as the size of the bottom end of the muffler body.

[0010] As a preferred scheme of the automobile muffler heat insulation cover, the bottom of the heat insulation cover body is fixed with a first clamping ring, one side of the first clamping ring is provided with a second clamping ring, and the first clamping ring and the second clamping ring are symmetrically designed.

[0011] As a preferred scheme of the automobile muffler heat insulation cover, the outer side of the first clamping ring and the second clamping ring is fixed with two groups of fixing blocks, the inner wall of the two groups of fixing blocks is fixed with a transversely arranged limiting rod, and the inner wall of the fixing block is provided with a second bolt.

[0012] As a preferred scheme of the automobile muffler heat insulation cover, the inner wall of the heat insulation cover body is provided with a first placing groove, the bottom of the sealing cover is provided with a first sealing ring, and the outer side of the first sealing ring is attached to the inner wall of the first placing groove, the inner wall of the inner cylinder is provided with a second placing groove, the bottom of the sealing cover is provided with a second sealing ring, and the outer side of the second sealing ring is attached to the inner wall of the second placing groove.

[0013] As a preferred scheme of the automobile muffler heat insulation cover, the bottom of the sealing cover is provided with six groups of positioning rods, the inner wall of the inner cylinder is provided with six groups of positioning holes, and the inner wall of the six groups of positioning holes is attached to the outer side of the six groups of positioning rods.

[0014] In summary, the automobile muffler heat insulation cover has the following beneficial effects:

[0015] 1、The setting of the heat shield body can protect the muffler body and the heat insulation assembly, the setting of the heat insulation assembly can block the heat generated by the muffler body from being transmitted outward through its internal structure, the setting of the heat dissipation fins and the heat dissipation grooves can increase the heat dissipation area of the device to promote air circulation and assist the muffler body in heat dissipation, the setting of the connecting flange and the sealing cover can seal the heat shield body to prevent heat from being transmitted through the gap, and the setting of the fixing assembly can fix the muffler body.

[0016] 2、The setting of the inner cylinder can protect the muffler body and can also protect the heat insulation cylinder arranged on its inner wall, the setting of the heat insulation cylinder made of ceramic fiber can effectively block the heat generated by the muffler from being transmitted outward, protect the surrounding parts from high temperature, and reduce the conduction of heat to the vehicle interior, and the setting of the vacuum interlayer can reduce the efficiency of heat conduction, thereby improving the heat insulation performance of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 It is the overall structure diagram of the automobile muffler heat shield.

[0019] Figure 2 It is the fixing assembly structure diagram of the automobile muffler heat shield.

[0020] Figure 3 It is the heat insulation assembly structure diagram of the automobile muffler heat shield.

[0021] Figure 4 It is the heat shield body structure diagram of the automobile muffler heat shield.

[0022] Figure 5 It is Figure 2 It is the enlarged structure diagram of A shown in the figure.

[0023] Marked number in the figure: 1, heat shield body; 2, muffler body; 3, heat insulation assembly; 31, inner cylinder; 32, heat insulation cylinder; 33, vacuum interlayer; 4, heat dissipation fin; 5, heat dissipation groove; 6, connecting flange; 7, sealing cover; 8, fixing assembly; 81, fixing ring; 82, first bolt; 9, sealing ring; 10, first clamping ring; 11, second clamping ring; 12, fixed block; 13, limiting rod; 14, second bolt; 15, first placing groove; 16, first sealing ring; 17, second placing groove; 18, second sealing ring; 19, positioning rod; 20, positioning hole. DETAILED DESCRIPTION

[0024] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application, but the present application can also be implemented in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0026] Secondly, the "one embodiment" or "embodiment" referred to herein means that specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0027] Embodiment one:

[0028] Reference Figures 1-5 For the first embodiment of the present application, the embodiment provides an automobile muffler heat shield, which comprises a heat shield body 1, the inside of the heat shield body 1 is provided with a muffler body 2, the inside of the heat shield body 1 is provided with a heat insulation assembly 3, the inner wall of the heat shield body 1 is provided with a heat dissipation fin 4, the inner wall of the heat shield body 1 is provided with a plurality of groups of heat dissipation grooves 5, the top of the heat shield body 1 is fixed with a connecting flange 6, the top of the connecting flange 6 is fixed with a sealing cover 7, the top of the sealing cover 7 is provided with a fixing assembly 8 for fixing the muffler body 2.

[0029] The heat shield body 1 adopts the material of aluminum alloy, can provide mechanical protection for the muffler body 2, prevent the heat insulation assembly 3 from being damaged due to external impact, friction or high temperature environment, meanwhile, the overall structural strength of the heat shield body 1 is enhanced, the heat insulation assembly 3 is arranged to block the heat generated by the muffler body 2 from being transmitted outward through the internal structure, the surrounding parts are protected from high temperature, meanwhile, the conduction of heat to the vehicle interior is reduced, the radiating fins 4 are arranged in a uniform arrangement manner, which can increase the heat dissipation area of the equipment, promote air circulation, assist the muffler body 2 in heat dissipation, thereby reducing the working temperature, the arrangement of the plurality of groups of radiating grooves 5 can discharge heat, the connecting flange 6 is composed of two connecting plates and fixing bolts, can connect the sealing cover 7 and the heat shield body 1, the arrangement of the sealing cover 7 can seal the heat shield body 1, the sealing property between the heat shield body 1 and the muffler body 2 is ensured, heat is prevented from being transmitted through the gap, meanwhile, water, oil and other liquids are prevented from penetrating, the arrangement of the fixing assembly 8 can fix the muffler body 2 placed in the heat shield body 1, it should be noted that the first connecting plate in the connecting flange 6 is fixedly connected with the outer side of the heat shield body 1, the second connecting plate is fixedly connected with the outer side of the sealing cover 7, therefore, when the first connecting plate and the second connecting plate are fixed by the fixing bolt, the sealing cover 7 and the heat shield body 1 can be fixed.

[0030] The heat insulation assembly 3 comprises an inner cylinder 31 fixed to the inner wall of the heat shield body 1, the inner wall of the inner cylinder 31 is in close contact with the outer side of the muffler body 2, the inner wall of the inner cylinder 31 is provided with a heat insulation cylinder 32, and the heat insulation cylinder 32 is made of ceramic fiber.

[0031] Since the inner cylinder 31 is in close contact with the muffler body 2, and the inner cylinder 31 is made of the same material as the heat shield body 1, the inner cylinder 31 can protect the muffler body 2 and the heat insulation cylinder 32 arranged on the inner wall thereof, the heat insulation cylinder 32 is made of ceramic fiber, which can effectively block the heat generated by the muffler from being transmitted outward, protect the surrounding parts from high temperature, and reduce the conduction of heat to the vehicle interior, and since the inner wall of the heat insulation cylinder 32 is provided with a vacuum interlayer 33, the heat insulation performance of the equipment can be improved due to the fact that the vacuum interlayer 33 can reduce the efficiency of heat conduction.

[0032] Embodiment two:

[0033] For the second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0034] Specifically, the fixing assembly 8 comprises a fixing ring 81 fixed to the top of the sealing cover 7, the inner wall of the fixing ring 81 is in sliding connection with the outer side of the muffler body 2, and the inner wall of the fixing ring 81 is threadedly connected with a plurality of groups of first bolts 82.

[0035] The bottom of the fixing ring 81 is fixedly connected with the top of the sealing cover 7, and the inner wall of the fixing ring 81 is slidably connected with the outer side of the muffler body 2, so that the muffler body 2 can be fixed when the first bolt 82 outside the fixing ring 81 is tightened.

[0036] Specifically, the inner wall of the heat shield body 1 is provided with three groups of sealing rings 9, and the sizes of the three groups of sealing rings 9 are the same as the size of the bottom end of the muffler body 2.

[0037] Since the sizes of the three groups of sealing rings 9 are the same as the size of the bottom end of the muffler body 2, when the muffler body 2 is inserted into the heat shield body 1, the sealing ring 9 can seal the connection between the muffler body 2 and the heat shield body 1, avoiding heat leakage from this place.

[0038] Specifically, the bottom of the heat shield body 1 is fixedly connected with the first clamping ring 10, one side of the first clamping ring 10 is provided with the second clamping ring 11, and the first clamping ring 10 and the second clamping ring 11 are symmetrically designed.

[0039] Since the first clamping ring 10 is fixedly connected with the bottom of the heat shield body 1, and the second clamping ring 11 is connected with the first clamping ring 10 through the limiting rod 13, when the second bolt 14 is tightened, the second clamping ring 11 will move towards the first clamping ring 10, thereby fixing the muffler body 2 inserted into the heat shield body 1.

[0040] Specifically, the outer sides of the first clamping ring 10 and the second clamping ring 11 are fixedly connected with two groups of fixed blocks 12, the inner walls of the two groups of fixed blocks 12 are fixedly connected with the limiting rod 13 arranged in the transverse direction, and the inner wall of the fixed block 12 is provided with the second bolt 14.

[0041] Since the outer sides of the first clamping ring 10 and the second clamping ring 11 are fixedly connected with the fixed blocks 12, and the inner wall of the fixed block 12 is fixedly connected with the limiting rod 13, when the second bolt 14 is tightened, the second clamping ring 11 will be fixed towards the first clamping ring 10, and it should be noted that one side of the fixed block 12 fixedly connected with the outer side of the second clamping ring 11 is fixedly connected with the limiting rod 13, and the outer side of the limiting rod 13 is slidably connected with the inner wall of the fixed block 12 fixedly connected with the outer side of the first clamping ring 10, so that the second clamping ring 11 can be moved towards the first clamping ring 10 when the second bolt 14 is tightened.

[0042] Embodiment three:

[0043] As a third embodiment of the utility model, the embodiment is based on the first two embodiments.

[0044] Specifically, the inner wall of the heat shield body 1 is provided with a first placing groove 15, the bottom of the sealing cover 7 is provided with a first sealing ring 16, and the outer side of the first sealing ring 16 and the inner wall of the first placing groove 15 are matched with each other. The inner wall of the inner cylinder 31 is provided with a second placing groove 17, and the bottom of the sealing cover 7 is provided with a second sealing ring 18, and the outer side of the second sealing ring 18 and the inner wall of the second placing groove 17 are matched with each other.

[0045] Because the first placing groove 15 and the second placing groove 17 are matched with the first sealing ring 16 and the second sealing ring 18 respectively, when the sealing cover 7 is installed on the top of the heat shield body 1, the first sealing ring 16 and the second sealing ring 18 provided on the bottom of the sealing cover 7 will be inserted into the first placing groove 15 and the second placing groove 17, so that the connection between the sealing cover 7 and the heat shield body 1 can be sealed, and heat leakage from this place is avoided.

[0046] Specifically, the bottom of the sealing cover 7 is provided with six groups of positioning rods 19, and the inner wall of the inner cylinder 31 is provided with six groups of positioning holes 20, and the inner wall of the six groups of positioning holes 20 and the outer side of the six groups of positioning rods 19 are matched with each other.

[0047] Because the six groups of positioning rods 19 are fixed on the bottom of the sealing cover 7, and the six groups of positioning holes 20 provided on the inner wall of the inner cylinder 31 and the outer side of the six groups of positioning rods 19 are matched with each other, when the sealing cover 7 is installed, the positioning rod 19 needs to be inserted into the positioning hole 20 first, so that the sealing cover 7 can be prevented from being deviated during installation, and the first sealing ring 16 and the second sealing ring 18 cannot be matched with the first placing groove 15 and the second placing groove 17.

[0048] When the heat shield body 1 needs to be installed, first, the muffler body 2 is inserted into the heat shield body 1, then the second bolt 14 is tightened, the second clamping ring 11 is moved to the first clamping ring 10 direction, so that the bottom end of the muffler body 2 can be fixed, at the same time, the inner wall of the heat shield body 1 is provided with three groups of sealing rings 9, and the size of the three groups of sealing rings 9 is the same as the size of the bottom end of the muffler body 2, so that the connection between the muffler body 2 and the heat shield body 1 can be sealed, and heat leakage from the connection is avoided. When the sealing cover 7 is installed on the top of the heat shield body 1, first, the positioning rod 19 fixed at the bottom of the sealing cover 7 is inserted into the positioning hole 20 formed in the inner wall of the inner cylinder 31, so that the sealing cover 7 can be prevented from being offset during installation, then the sealing cover 7 is fixed with the heat shield body 1 through the connecting flange 6, and since the first placing groove 15 and the second placing groove 17 are matched with the first sealing ring 16 and the second sealing ring 18 respectively, the first sealing ring 16 and the second sealing ring 18 are inserted into the first placing groove 15 and the second placing groove 17, so that the connection between the sealing cover 7 and the heat shield body 1 can be sealed. After the sealing cover 7 is installed, the first bolt 82 outside the fixing ring 81 is tightened to fix the top end of the muffler body 2. Since the heat shield body 1 is provided with the heat shield cylinder 32 inside, and the heat shield cylinder 32 is provided with the vacuum layer 33 inside, the heat generated by the muffler is effectively prevented from being transmitted outward, the surrounding parts are protected from high temperature, the conduction of heat to the vehicle interior is reduced, and the heat conduction efficiency is reduced, so that the heat insulation performance of the equipment is improved. The heat dissipation fins 4 arranged on the inner wall of the heat shield body 1 can increase the heat dissipation area of the equipment, promote air circulation, assist the muffler body 2 to dissipate heat, and thus reduce the working temperature.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A heat shield for a vehicle muffler comprising a heat shield body (1), characterized in that: The inside of the heat shield body (1) is provided with a silencer body (2), the inside of the heat shield body (1) is provided with a heat insulation assembly (3), the inner wall of the heat shield body (1) is provided with a heat dissipation fin (4), the inner wall of the heat shield body (1) is provided with a plurality of heat dissipation grooves (5), the top of the heat shield body (1) is fixedly connected with a connecting flange (6), the top of the connecting flange (6) is fixedly connected with a sealing cover (7), and the top of the sealing cover (7) is provided with a fixing assembly (8) for fixing the silencer body (2). The heat insulation assembly (3) comprises an inner cylinder (31) fixed to the inner wall of the heat shield body (1), and the inner wall of the inner cylinder (31) is in close contact with the outer side of the silencer body (2), the inner wall of the inner cylinder (31) is provided with a heat insulation cylinder (32), and the heat insulation cylinder (32) is made of ceramic fiber, and the inner wall of the heat insulation cylinder (32) is provided with a vacuum interlayer (33).

2. The automotive muffler heat shield of claim 1, wherein: The fixing assembly (8) comprises a fixing ring (81) fixed to the top of the sealing cover (7), and the inner wall of the fixing ring (81) is in sliding connection with the outer side of the silencer body (2), and the inner wall of the fixing ring (81) is threadedly connected with a plurality of first bolts (82).

3. The automotive muffler heat shield of claim 1, wherein: The inner wall of the heat shield body (1) is provided with three sealing rings (9), and the size of the three sealing rings (9) is the same as that of the bottom end of the silencer body (2).

4. The automotive muffler heat shield of claim 1, wherein: The bottom of the heat shield body (1) is fixedly connected with a first clamping ring (10), one side of the first clamping ring (10) is provided with a second clamping ring (11), and the first clamping ring (10) and the second clamping ring (11) are designed to be symmetrical.

5. The automotive muffler heat shield of claim 4, wherein: The outer sides of the first clamping ring (10) and the second clamping ring (11) are fixedly connected with two groups of fixing blocks (12), the inner walls of the two groups of fixing blocks (12) are fixedly connected with transversely arranged limiting rods (13), and the inner wall of the fixing block (12) is provided with a second bolt (14).

6. The automotive muffler heat shield of claim 1, wherein: The inner wall of the heat shield body (1) is provided with a first placing groove (15), the bottom of the sealing cover (7) is provided with a first sealing ring (16), and the outer side of the first sealing ring (16) is in close contact with the inner wall of the first placing groove (15), the inner wall of the inner cylinder (31) is provided with a second placing groove (17), the bottom of the sealing cover (7) is provided with a second sealing ring (18), and the outer side of the second sealing ring (18) is in close contact with the inner wall of the second placing groove (17).

7. The automotive muffler heat shield of claim 6, wherein: The bottom of the sealing cover (7) is provided with six positioning rods (19), the inner wall of the inner cylinder (31) is provided with six positioning holes (20), and the inner walls of the six positioning holes (20) are in close contact with the outer sides of the six positioning rods (19).

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