Automobile exhaust pipe heat shield with sound attenuation and noise reduction functions

Abstract

The utility model relates to the technical field of automobile exhaust, and discloses an automobile exhaust pipe heat shield with silencing and noise reduction functions, which comprises a heat shield, a first mounting ring and a second mounting ring, the first mounting ring and the second mounting ring are arranged at two ends of the heat shield, and fixing mechanisms are arranged on the first mounting ring and the second mounting ring. A fixing ring is embedded into a groove, then a first mounting ring is rotated, so that a mounting block slides in a rotating groove and is limited and fixed in the rotating groove, meanwhile, a sealing ring in the groove is automatically inserted into a sealing groove of the fixing ring, gas and heat leakage is prevented, then a sliding block is shifted through a shifting rod, the sliding block slides along a sliding rod, and a spring is extruded; and then the rotating plate is overturned to the position of the fixing block, the shifting rod is loosened, the clamping block is automatically inserted into the clamping groove under the springback effect of the spring, locking of the first mounting ring and the second mounting ring can be achieved, accordingly, mounting of the heat insulation cover is completed, the operation process is simple and convenient, and the mounting efficiency of the heat insulation cover is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile exhaust, concretely to a heat shield of automobile exhaust pipe with noise reduction function. BACKGROUND

[0002] The automobile exhaust system is mainly used for discharging the exhaust gas of engine operation, reducing the exhaust gas pollution and noise, and the heat shield of exhaust pipe is a heat insulation structure installed around the exhaust pipe of engine, which aims to prevent the high temperature radiation of exhaust pipe from affecting the adjacent parts and increase the safety of engine operation, and its main functions are heat insulation, noise reduction and protection.

[0003] A novel heat shield structure of automobile exhaust pipe is provided in Chinese patent with publication number CN212337420U, which comprises an exhaust pipe body, and a fixed plate is fixedly connected to the right side of the annular aluminized steel plate, the heat shield structure of automobile exhaust pipe is provided with a damping and noise reduction structure, a heat absorption structure, a heat and sound insulation structure and an annular aluminized steel plate, the damping and noise reduction structure reduces the noise and vibration of the exhaust pipe body, the heat absorption structure preliminarily absorbs the heat of the exhaust pipe body, thereby reducing the high temperature in the exhaust pipe body, the heat and sound insulation structure further blocks the high temperature radiation of the exhaust pipe body, thereby reducing the influence of high temperature radiation on the adjacent parts of the exhaust pipe body, and the annular aluminized steel plate has heat reflection, which further reduces the influence of high temperature radiation in the exhaust pipe body on the adjacent parts, thereby achieving the treatment of high temperature gas in the exhaust pipe body and the reduction of the influence of high temperature radiation on the adjacent parts.

[0004] However, the heat shield needs to be fixed by using multiple groups of screws during installation, which not only affects the installation efficiency, but also brings great inconvenience to the disassembly and replacement operation of the heat shield, and therefore a heat shield of automobile exhaust pipe with noise reduction function needs to be provided. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a heat shield of automobile exhaust pipe with noise reduction function to solve the problems in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A heat shield for automobile exhaust pipe with noise reduction function, including heat shield and first mounting ring and second mounting ring who sets in heat shield both ends, it is provided with fixed mechanism on first mounting ring and second mounting ring, the fixed mechanism includes the recess that opens on first mounting ring, the mounting block is fixedly arranged in the recess, the fixed ring is fixedly arranged on second mounting ring, the rotating groove that opens with mounting block adaptation is equipped on the fixed ring, the rotating axle seat is fixedly arranged on first mounting ring, the rotating plate is rotatably arranged on rotating axle seat, the sliding block is slidably arranged in rotating plate, both ends of sliding block are fixedly provided with sliding block, the sliding slot that is slidably connected with sliding block is opened in rotating plate, the slide rod is fixedly arranged in sliding slot, the spring that is fixedly arranged between sliding block and sliding slot is sleeved on slide rod, the clamping block is fixedly arranged on one side of sliding block, the fixed block is fixedly arranged on second mounting ring, the clamping groove that is adapted with clamping block is opened on one side of fixed block.

[0007] Preferably, the recess is fixedly provided with a sealing ring, and the fixed ring is provided with a sealing groove matched with the sealing ring.

[0008] Preferably, the sliding block is fixedly provided with a lever.

[0009] Preferably, the heat shield is divided into a plurality of segments along the axial direction of the automobile exhaust pipe, and the heat shields of the plurality of segments are connected through the fixed mechanism.

[0010] Preferably, the heat shield comprises an outer shell, an inner sound-absorbing layer, and a heat-insulating layer arranged between the outer shell and the sound-absorbing layer.

[0011] Preferably, the outer shell is made of high-temperature-resistant stainless steel material, the heat-insulating layer is made of ceramic fiber cotton, and the sound-absorbing layer is made of sound-absorbing honeycomb ceramic.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1) The heat shield for automobile exhaust pipe with noise reduction function, by embedding the fixed ring into the recess, then rotating the first mounting ring, the mounting block slides along the rotating groove and is fixedly positioned in the rotating groove, at the same time, the sealing ring in the recess automatically inserts into the sealing groove of the fixed ring, preventing gas and heat leakage, then the lever is used to move the sliding block to make the sliding block slide along the slide rod and press the spring, after that, the rotating plate is turned over to the fixed block and the lever is loosened, the clamping block automatically inserts into the clamping groove under the rebounding action of the spring, which can realize the locking of the first mounting ring and the second mounting ring, thus completing the installation of the heat shield, the operation process is simple and convenient, and the installation efficiency of the heat shield is greatly improved.

[0014] 2) The automobile exhaust pipe heat shield with noise reduction function, through the knob lever, the sliding block drives the clamping block to separate from the clamping groove, then rotates the first mounting ring to make the mounting block rotate to the entrance and exit of the rotating groove, then separates the first mounting ring from the second mounting ring, and then the heat shield is taken off from the exhaust pipe to complete the quick disassembly of the heat shield, so that the heat shield is cleaned or replaced.

[0015] 3) The automobile exhaust pipe heat shield with noise reduction function, through the high-temperature-resistant metal material of the shell, the protection of the exhaust pipe is effectively improved, the porous structure in the sound absorption layer can make the sound waves repeatedly reflect and refract, so as to consume sound energy, achieve the effect of noise reduction, and the heat insulation layer can also reduce the noise caused by temperature change to a certain extent, the heat insulation layer can effectively prevent the heat generated by the exhaust pipe from being transmitted outward, protect the surrounding automobile parts from high temperature damage, and also reduce the absorption of heat in the car, improve the comfort of the car. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic view of the automobile exhaust pipe heat shield with noise reduction function in the embodiment of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic view of the first mounting ring in the embodiment of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic view of the rotating plate in the embodiment of the utility model;

[0019] Figure 4 It is a three-dimensional structure schematic view of the second mounting ring in the embodiment of the utility model;

[0020] Figure 5 It is a sectional structure schematic view of the heat shield in the embodiment of the utility model.

[0021] In the drawing: 1, heat shield; 101, shell; 102, heat insulation layer; 103, sound absorption layer; 2, first mounting ring; 3, second mounting ring; 4, fixing mechanism; 401, groove; 402, sealing ring; 403, mounting block; 404, rotating shaft seat; 405, rotating plate; 406, sliding block; 407, sliding block; 408, sliding groove; 409, sliding rod; 410, spring; 411, clamping block; 412, knob lever; 413, fixed block; 414, clamping groove; 415, fixed ring; 416, rotating groove; 417, sealing groove. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the present application.

[0023] Embodiment one

[0024] In combination Figures 1-5 A heat shield for automobile exhaust pipe with noise reduction function, comprising a heat shield 1 and a first mounting ring 2 and a second mounting ring 3 arranged at both ends of the heat shield 1, the heat shield 1 is divided into multiple segments along the axial direction of the automobile exhaust pipe, the heat shield 1 between the multiple segments is connected through a fixing mechanism 4, the heat shield 1 comprises an outer shell 101 on the outer layer, an acoustic layer 103 on the inner side and a heat insulation layer 102 arranged between the outer shell 101 and the acoustic layer 103, the outer shell 101 is made of stainless steel material with high temperature resistance, the heat insulation layer 102 is made of ceramic fiber cotton, the acoustic layer 103 is made of sound-absorbing honeycomb ceramic, the first mounting ring 2 and the second mounting ring 3 are provided with the fixing mechanism 4.

[0025] Specifically, the outermost layer of the heat shield 1 is an outer shell 101 made of metal material with high temperature resistance, which effectively improves the protection of the exhaust pipe, when the automobile engine works, the exhaust gas enters the heat shield 1, the porous structure in the acoustic layer 103 can make the sound wave repeatedly reflect and refract, so as to consume sound energy, achieve the effect of noise reduction, at the same time, the heat insulation layer 102 can also reduce the noise caused by temperature change to a certain extent, the heat insulation layer 102 can effectively prevent the heat generated by the exhaust pipe from being transmitted outward, protect the surrounding automobile parts from high temperature damage, at the same time, also reduce the absorption of heat in the car, improve the comfort of the car.

[0026] Referring to Figures 2-4Further, the fixing mechanism 4 comprises a groove 401 formed on the first mounting ring 2, a mounting block 403 fixedly arranged in the groove 401, a fixing ring 415 fixedly arranged on the second mounting ring 3, a rotating groove 416 formed on the fixing ring 415 and matched with the mounting block 403, a sealing ring 402 fixedly arranged in the groove 401, and a sealing groove 417 formed on the fixing ring 415 and matched with the sealing ring 402; the first mounting ring 2 is fixedly provided with a rotating shaft seat 404, the rotating shaft seat 404 is rotatably provided with a rotating plate 405, the rotating plate 405 is slidably provided with a sliding block 406, both ends of the sliding block 406 are fixedly provided with sliding blocks 407, the rotating plate 405 is formed with sliding grooves 408 slidably connected with the sliding blocks 407, the sliding grooves 408 are fixedly provided with sliding rods 409, the sliding rods 409 are sleeved with springs 410 fixedly arranged between the sliding blocks 407 and the sliding grooves 408, the sliding block 406 is fixedly provided with a lever 412, one side of the sliding block 406 is fixedly provided with a clamping block 411, the second mounting ring 3 is fixedly provided with a fixing block 413, and one side of the fixing block 413 is formed with a clamping groove 414 matched with the clamping block 411.

[0027] Specifically, the plurality of heat shields 1 are produced in equal lengths according to the length of the automobile exhaust pipe, the heat shields 1 are sleeved on the automobile exhaust pipe, then each heat shield 1 is connected through the first mounting ring 2 and the second mounting ring 3, when connected, the fixing ring 415 on the second mounting ring 3 is embedded into the groove 401 of the first mounting ring 2, and the mounting block 403 in the groove 401 is inserted into the entrance and exit of the rotating groove 416 on the fixing ring 415, then the first mounting ring 2 is rotated, the mounting block 403 is slid along the rotating groove 416 and is fixedly positioned in the rotating groove 416, the preliminary fixing of the first mounting ring 2 and the second mounting ring 3 is completed, at the same time, the sealing ring 402 in the groove 401 is automatically inserted into the sealing groove 417 of the fixing ring 415 to prevent gas and heat leakage, at this time, the rotating plate 405 and the fixing block 413 are on the same horizontal line, then the sliding block 406 is moved by the lever 412, the sliding block 407 slides along the sliding rod 409 in the sliding groove 408 and presses the spring 410, then the rotating plate 405 is turned to the fixing block 413, the clamping block 411 on the sliding block 406 is aligned with the clamping groove 414 of the fixing block 413, then the lever 412 is loosened, the clamping block 411 is reset under the rebounding action of the spring 410, the clamping block 411 is reset and automatically inserted into the clamping groove 414, the locking of the first mounting ring 2 and the second mounting ring 3 is realized, and the installation of the heat shield 1 is completed.

[0028] When the heat shield 1 needs to be cleaned or replaced, only the push rod 412 is pushed to make the sliding block 406 drive the clamping block 411 to be separated from the clamping groove 414, then the first mounting ring 2 is rotated to make the mounting block 403 rotate to the entrance and exit of the rotating groove 416, then the first mounting ring 2 is separated from the second mounting ring 3, and finally the heat shield 1 is taken off from the exhaust pipe.

[0029] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A heat shield for an exhaust pipe of a vehicle with a sound deadening and noise reduction function, comprising a heat shield (1) and a first mounting ring (2) and a second mounting ring (3) arranged at both ends of the heat shield (1), characterized in that: The first mounting ring (2) and the second mounting ring (3) are provided with a fixing mechanism (4); The fixing mechanism (4) comprises a groove (401) formed in the first mounting ring (2), the groove (401) is fixedly provided with a mounting block (403), the second mounting ring (3) is fixedly provided with a fixing ring (415), and the fixing ring (415) is provided with a rotating groove (416) matched with the mounting block (403); The first mounting ring (2) is fixedly provided with a rotating shaft seat (404), the rotating shaft seat (404) is rotatably provided with a rotating plate (405), the rotating plate (405) is slidably provided with a sliding block (406), both ends of the sliding block (406) are fixedly provided with sliding blocks (407), the rotating plate (405) is provided with a sliding groove (408) slidably connected with the sliding blocks (407), the sliding groove (408) is fixedly provided with a sliding rod (409), the sliding rod (409) is sleeved with a spring (410) fixedly arranged between the sliding blocks (407) and the sliding groove (408), one side of the sliding block (406) is fixedly provided with a clamping block (411), the second mounting ring (3) is fixedly provided with a fixed block (413), and one side of the fixed block (413) is provided with a clamping groove (414) matched with the clamping block (411).

2. The automobile exhaust pipe heat shield with noise reduction function according to claim 1, characterized in that: The groove (401) is fixedly provided with a sealing ring (402), and the fixing ring (415) is provided with a sealing groove (417) matched with the sealing ring (402).

3. The heat shield for a vehicle exhaust pipe with a sound deadening and noise reduction function according to claim 2, characterized in that: The sliding block (406) is fixedly provided with a pulling rod (412).

4. The automobile exhaust pipe heat shield with noise reduction function according to claim 1, characterized in that: The heat shield (1) is axially divided into a plurality of segments along the automobile exhaust pipe, and the heat shields (1) of the plurality of segments are connected through the fixing mechanism (4).

5. The heat shield for a vehicle exhaust pipe with a sound deadening and noise reduction function according to claim 1, characterized in that: The heat shield (1) comprises an outer shell (101), an inner sound-absorbing layer (103), and a heat-insulating layer (102) arranged between the outer shell (101) and the sound-absorbing layer (103).

6. The heat shield for a vehicle exhaust pipe with a sound deadening and noise reduction function according to claim 5, characterized in that: The outer shell (101) is made of high-temperature-resistant stainless steel material, the heat-insulating layer (102) is made of ceramic fiber cotton, and the sound-absorbing layer (103) is made of sound-absorbing honeycomb ceramic.

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