Automobile engine compartment sound insulation cover based on foamed aluminum

Abstract

The invention discloses an automobile engine compartment sound-proof cover based on foamed aluminum, and belongs to the technical field of sound-proof covers. Comprising a cover mechanism, a fish scale mechanism is arranged at the outer end of the cover mechanism, four auxiliary mechanisms are arranged in the cover mechanism, a plurality of fixing blocks are arranged on the end face of the cover mechanism, the fixing blocks are connected with n-shaped clamping blocks, a hexagonal hole plate is arranged in the cover mechanism, and multiple pieces of vortex foamed aluminum are arranged on the inner wall of the hexagonal hole plate. The cover mechanism comprises a cover body, two short clamping blocks and two side clamping blocks, and two Z-shaped grooves are formed in the end face of the cover body. The vortex foamed aluminum on the inner wall of the hexagonal hole plate is used for attenuating transmitted-in noise, the fish scales attached in an overlapped mode are used for effectively solving the problems that a static sealing rubber strip is hardened, cracked and invalid due to long-term vibration fatigue and oil immersion, and the mass block and the warping rod in the auxiliary mechanism are matched, so that the sealing performance is improved. And the vibration radiation noise force of the cover body is inhibited from the noise source.

Description

Technical Field

[0001] This invention relates to the field of soundproof cover technology, and more specifically, to a soundproof cover for an automotive engine compartment based on aluminum foam. Background Technology

[0002] With the rapid development of the automotive industry and the continuous improvement of consumers' requirements for driving and riding quality, the NVH (noise, vibration, and harshness) performance of the whole vehicle has become one of the key indicators for measuring the level of automobile manufacturing. As the core assembly of a car, the engine is its most important noise and heat source. The noise spectrum generated during its operation is complex, including low- and mid-frequency structural noise radiated through the engine's surface caused by combustion impact and mechanical motion, as well as high-frequency air noise generated by the intake system, fuel injection system, and various accessories. These noises enter the passenger compartment through multiple paths such as the firewall and chassis, seriously affecting the quietness and comfort of the ride.

[0003] The sound insulation of automobile engine compartments generally uses sound insulation pads or covers made of multi-layer composite materials, which are mainly based on the mass law, sound absorption principle and damping vibration reduction. However, the sound insulation cover has the following problems: single function and inconvenient maintenance, static seal is prone to failure under harsh working conditions, and lacks active suppression capability for engine order noise. In order to solve these problems, this application proposes a new type of automobile engine compartment sound insulation cover based on aluminum foam. Summary of the Invention

[0004] The purpose of this invention is to provide a car engine compartment sound insulation cover based on aluminum foam to solve the problems mentioned in the background art: vortex aluminum foam attenuates the transmitted noise and solves the problem of static sealing strips being fatigued by long-term vibration, thus suppressing the vibration radiation noise of the cover from the source of noise.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A soundproof cover for an automotive engine compartment based on aluminum foam includes a cover mechanism. The outer end of the cover mechanism is provided with a fish scale mechanism. The cover mechanism is provided with four auxiliary mechanisms inside. The end face of the cover mechanism is provided with multiple fixing blocks. Each of the multiple fixing blocks is connected to a zig-shaped locking block. The cover mechanism is provided with a hexagonal perforated plate inside. The inner wall of the hexagonal perforated plate is provided with multiple vortex aluminum foam. The cover mechanism includes a cover body, two short locking blocks and two side locking blocks. The end face of the cover body has two Z-shaped grooves. The end faces of the two short locking blocks are provided with sliders. The interior of the two side locking blocks is provided with a first folding rod and the interior of the two side locking blocks is provided with a second folding rod. The outer end face of the cover body has multiple movable grooves. The fish scale mechanism includes multiple fish scale plates, and each of the multiple fish scale plates has a movable block on its end face. The four auxiliary mechanisms include four pillars, four rocker arms, and four fixing plates. Each of the four pillars has a mass block inside and a limiting post inside.

[0006] By adopting the above technical solution, the transmitted noise is attenuated by the vortex foam aluminum on the inner wall of the hexagonal perforated plate; By using overlapping fish scales, the problem of static sealing strips hardening and cracking due to long-term vibration fatigue and oil immersion is effectively solved. By using the mass block and rocker arm inside the auxiliary mechanism, the force that suppresses the vibration radiation noise of the enclosure is suppressed at the source of noise.

[0007] Preferably, the cover mechanism is provided with a sealing aluminum foam plate inside, and the inner wall of the cover mechanism is provided with triangular blocks.

[0008] By adopting the above technical solution, the interior of the cover mechanism is wrapped with aluminum foam, and the triangular block is used to support the middle position of the hexagonal perforated plate, so that the middle position is not so empty.

[0009] Preferably, the inner wall of the cover body is provided with a top groove, and a cross block is provided inside the top groove. The cross block is slidably disposed inside two short locking blocks.

[0010] By adopting the above technical solution, the cross block is used to support and connect the short blocks, allowing the two short blocks to move synchronously inside the top groove.

[0011] Preferably, both short card blocks have top card slots on their end faces, the two sliders are respectively disposed inside the two Z-shaped slots, and both short card blocks are disposed inside the top slots.

[0012] By adopting the above technical solution, the top slot is fixed to the edge of the hexagonal perforated plate, and the slider slides inside the Z-groove to place the short card block, which facilitates the subsequent placement of the hexagonal perforated plate.

[0013] Preferably, the inner wall of the cover body has two side grooves, and the two side locking blocks are respectively disposed in the two side grooves, and the end face of the two side locking blocks is provided with a side locking groove.

[0014] By adopting the above technical solution, the side block can slide inside the side groove, and the retracted side block can facilitate the subsequent placement of the hexagonal hole plate.

[0015] Preferably, each of the two side grooves has a first inner groove on its inner wall, and each of the two side grooves has a second inner groove on its inner wall. The two first folding rods are respectively disposed inside the two first inner grooves, and the two second folding rods are respectively disposed inside the two second inner grooves.

[0016] By adopting the above technical solution, the first folding rod sliding inside the first inner groove and the second folding rod sliding inside the second inner groove can drive the side block to slide inside the side groove, which facilitates the synchronous movement of the side block.

[0017] Preferably, each of the two first inner grooves is provided with a first semicircular block, each of the two second inner grooves is provided with a second semicircular block, the two first semicircular blocks are respectively provided inside the two first folding rods, and the two second semicircular blocks are respectively provided inside the two second folding rods.

[0018] By adopting the above technical solution, the first semicircular block can press the first folding rod, causing the first folding rod to slide inward in the first inner groove, and the second semicircular block can press the second folding rod, causing the second folding rod to slide inward in the second inner groove, which facilitates the synchronous movement of the side locking block.

[0019] Preferably, a first soft sheet is provided between each of the two short card blocks and the two first folding rods, and a second soft sheet is provided between each of the two first folding rods and the second folding rods, with the two second soft sheets respectively disposed inside the two side card blocks.

[0020] By adopting the above technical solution, when the first folding rod is pulled by the short card block through the first soft sheet, the first folding rod pulls the second folding rod through the second soft sheet, so that the short card block can drive the first folding rod and the second folding rod to move synchronously.

[0021] Preferably, the inner wall of the cover body is provided with four circular grooves, the end faces of the two side blocks are provided with two first square grooves, the inner walls of the four first square grooves are provided with first springs, the end faces of the two short blocks are provided with two second square grooves, and the inner walls of the two second square grooves are provided with second springs.

[0022] By adopting the above technical solution, the circular groove inside the cover body is used to place the column block, and the first spring inside the first square groove can push the short locking block so that the short locking block can lock the hexagonal hole plate. The second spring inside the second square groove can push the side locking block so that the side locking block can lock the side of the hexagonal hole plate.

[0023] Preferably, the end face of the column block has a slot, the end face of the mass block has a connecting slot, the rocker arm is disposed inside the connecting slot, the end face of the rocker arm is connected to a fulcrum block, the end face of the rocker arm is provided with a connecting block, the connecting block is provided with a traction block, the traction block is connected to a fixing plate, and the end face of the limiting column has four limiting slots.

[0024] By adopting the above technical solution, damping fluid is filled between the column block and the mass block, and the mass block is restricted by the limiting column to slide but not rotate. The fixed plate pulls the rocker arm through the traction block, and the rocker arm can drive the mass block to slide inside the column block, which can facilitate the cancellation of noise generated by vibration.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1) The soundproof enclosure has a hexagonal perforated plate inside, and each hexagonal hole in the plate contains a vortex aluminum foam. The separate vortex aluminum foam is easier to replace. Moreover, the vortex aluminum foam is composed of two layers of aluminum foil sandwiching aluminum foam. After being rolled up, it forms a continuous, gradually expanding spiral channel. After sound waves enter the channel, they need to travel a long spiral path filled with sound-absorbing aluminum foam before they can be reflected. The energy is greatly consumed by friction. In addition, the aluminum foil layers form countless parallel high-reflectivity radiation screens during the rolling process, which reduces the heat conduction efficiency to an extremely low level.

[0026] 2) The inner wall of this soundproof enclosure is equipped with a fish scale mechanism. This fish scale mechanism is set on the main body of the enclosure through movable blocks. Due to its elasticity, the fish scale plates slightly adhere to the mounting base in the engine compartment, forming a basic seal. When the engine vibrates, a high-frequency micro-amplitude relative movement is generated between the enclosure and the base. This tiny lateral sliding is like countless small wipers continuously scraping the contact surface. Oil and water cannot adhere stably and will be gradually pumped out, preventing the formation of an oil film or water film that penetrates the sealing layer. This effectively solves the problem of static sealing strips hardening, cracking and failing due to long-term vibration fatigue and oil immersion.

[0027] 3) An auxiliary mechanism is installed inside the soundproof enclosure. A mass block is installed inside the column of the auxiliary mechanism. The mass block is connected to a rocker arm. When the engine vibration forces the enclosure body to move, the enclosure body pulls the rocker arm through the output end of the rocker arm. Due to the offset of the fulcrum of the rocker arm, the mass block at the other end of the rocker arm will be pushed downward. The two forces cancel each other out at the fulcrum of the rocker arm, thereby significantly reducing the vibration amplitude of the enclosure at this frequency and suppressing the force of the enclosure vibration radiating noise from the source of noise. Attached Figure Description

[0028] Figure 1 This is a first axial side view of the present invention; Figure 2 This is a second axial side view of the present invention; Figure 3 This is an axial side view of the hexagonal perforated plate of the present invention; Figure 4 This is an axonometric schematic diagram of the triangular block of the present invention; Figure 5 This is an axial side view of the main body of the cover of the present invention; Figure 6 This is a partial axial side view of the main body of the cover of the present invention; Figure 7 This is an axial view of the side block of the present invention; Figure 8 This is an axial side view of part of the fish scale plate of the present invention; Figure 9 This is an isometric view of the auxiliary mechanism of the present invention; Figure 10 This is a cross-sectional axial view of the auxiliary mechanism of the present invention; Figure 11 This is an axial side view of the mass block of the present invention.

[0029] Explanation of the numbers in the diagram: 1. Cover mechanism; 2. Fish scale mechanism; 3. Auxiliary mechanism; 4. Sealing plate aluminum foam; 5. Z-shaped locking block; 6. Fixing block; 7. Hexagonal perforated plate; 8. Scroll aluminum foam; 9. Triangular block; 101. Cover body; 102. Top groove; 103. Cross block; 104. Short locking block; 105. Z-shaped groove; 106. Slider; 107. Side locking block; 108. Side locking groove; 109. Circular groove; 110. Side groove; 111. First inner groove; 112. Second inner groove; 113. First semicircular block; 114. Second semicircular block; 115. 116. First square groove; 117. First folding rod; 118. Second folding rod; 119. First flexible piece; 120. Top locking groove; 121. Second spring; 122. Second square groove; 123. Second flexible piece; 124. Movable groove; 201. Fish scale plate; 202. Movable block; 301. Column block; 302. Slot; 303. Rocker arm; 304. Connecting block; 305. Fulcrum block; 306. Traction block; 307. Fixing piece; 308. Limiting column; 309. Mass block; 310. Connecting groove; 311. Limiting groove. Detailed Implementation

[0030] Example 1, please refer to Figures 1 to 4 A soundproof cover for an automotive engine compartment based on aluminum foam includes a cover mechanism 1, a fish scale mechanism 2 at the outer end of the cover mechanism 1, four auxiliary mechanisms 3 inside the cover mechanism 1, multiple fixing blocks 6 on the end face of the cover mechanism 1, each of the multiple fixing blocks 6 being connected to a zig-shaped locking block 5, a hexagonal perforated plate 7 inside the cover mechanism 1, and multiple vortex aluminum foam 8 on the inner wall of the hexagonal perforated plate 7, which attenuates the transmitted noise.

[0031] Specifically, the cover mechanism 1 is equipped with a sealing aluminum foam 4 inside, and a triangular block 9 is provided on the inner wall of the cover mechanism 1.

[0032] Furthermore, the fish scale mechanism 2 is slidably disposed on the outer end face of the cover mechanism 1, the four auxiliary mechanisms 3 are respectively fixedly disposed on the front and rear sides of the inner bottom surface of the cover body 101, the multiple fixing blocks 6 are specifically five, fixedly disposed on the lower end face of the cover mechanism 1, the multiple Z-shaped locking blocks 5 are respectively fixedly disposed inside the multiple fixing blocks 6, the hexagonal hole plate 7 is snapped into the inside of the cover mechanism 1, the multiple vortex foam aluminum 8 are respectively movably disposed inside the hexagonal holes of the hexagonal hole plate 7, the triangular block 9 is fixedly disposed in the middle position of the inner bottom surface of the cover mechanism 1, and the sealing plate foam aluminum 4 is interference-fitted and disposed in the upper position inside the cover mechanism 1.

[0033] The invention is used in the following steps: The cover mechanism 1 is installed inside the engine compartment via a bimetallic strip 5. This bimetallic strip 5 is made of two layers of metal sheets with significantly different coefficients of thermal expansion, supporting the cover body a few millimeters above the connecting seat. As the engine compartment heats up, the curvature of the bimetallic strip undergoes precise and controllable minute changes due to the different expansion amounts of the two metal layers, enhancing the stability of the cover mechanism 1. The slender bimetallic structure of the connecting bridge itself, and its point contact with the cover panel, greatly extend the heat conduction path, significantly reducing the heat transferred from the high-temperature body sheet metal through the studs to the cover body and then radiated into the compartment. The active deformation of the sheet offsets the thermal stress caused by the material difference and uneven heating between the cover panel and the body, preventing the cover from warping or tearing at the connection point. At the same time, its flexibility also provides additional vibration damping. Moreover, the cover mechanism 1 is equipped with a hexagonal perforated plate 7. The vortex foam aluminum 8 set on the inner wall of the hexagonal perforated plate 7 can be installed and replaced separately. After the vortex foam aluminum 8 is rolled up, a continuous and gradually expanding spiral channel is formed inside. After the sound wave enters the channel, it needs to travel a long spiral path filled with sound-absorbing foam aluminum before it can be reflected out, and the energy is greatly consumed by friction.

[0034] Example 2, please refer to Figures 4 to 7 The difference from Embodiment 1 is that the cover mechanism 1 includes a cover body 101, two short locking blocks 104 and two side locking blocks 107. The end face of the cover body 101 has two Z-shaped grooves 105. The end faces of the two short locking blocks 104 are each provided with a slider 106. The two side locking blocks 107 are each provided with a first folding rod 117 and a second folding rod 118. The outer end face of the cover body 101 has multiple movable grooves 124. The cooperation between the short locking blocks 104 and the side locking blocks 107 facilitates the installation and disassembly of the hexagonal hole plate 7.

[0035] Specifically, the inner wall of the cover body 101 has a top groove 102, inside which a cross block 103 is disposed. The cross block 103 is slidably disposed inside two short locking blocks 104. Each end face of the two short locking blocks 104 has a top locking groove 120. Two sliders 106 are respectively disposed inside two Z-shaped grooves 105. Both short locking blocks 104 are disposed inside the top groove 102. The inner wall of the cover body 101 has two side grooves 110, inside which two side locking blocks 107 are respectively disposed. Each end face of the two side locking blocks 107 has a side locking groove 108. The inner walls of the two side grooves 110 have a first inner groove 111 and a second inner groove 112. Two first folding rods 117 are respectively disposed inside the two first inner grooves 111, and two second folding rods 118 are respectively disposed inside the two second inner grooves 112. Each of the two inner grooves 112 is provided with a first semicircular block 113. Two second semicircular blocks 114 are provided inside each of the two inner grooves 112. The two first semicircular blocks 113 are respectively located inside each of the two first folding rods 117. Two second semicircular blocks 114 are respectively located inside each of the two second folding rods 118. A first flexible sheet 119 is provided between each of the two short locking blocks 104 and the two first folding rods 117. A second flexible sheet 123 is provided between each of the two first folding rods 117 and the second folding rods 118. Two second flexible sheets 123 are respectively located inside each of the two side locking blocks 107. The inner wall of the cover body 101 has four circular grooves 109. The end faces of each of the two side locking blocks 107 have two first square grooves 115. The inner walls of the four first square grooves 115 are provided with first springs 116. The end faces of each of the two short locking blocks 104 have two second square grooves 122. The inner walls of the two second square grooves 122 are provided with second springs 121.

[0036] Furthermore, two Z-shaped grooves 105 are respectively formed on the middle of the rear side of the upper end face of the cover body 101, near the sides. Two sliders 106 are respectively fixedly set on the upper end face of two short locking blocks 104. A top groove 102 is formed on the inner wall of the rear side of the cover body 101. A cross block 103 is slidably set on the inner wall of the top groove 102 near the middle. Two short locking blocks 104 are respectively slidably set on the inner walls on both sides of the top groove 102. Two short locking blocks 104 are respectively slidably set on the outer end face of both sides of the cross block 103. Two top locking grooves 120 are respectively formed on the front end face of the short locking blocks 104. Two sliders 106 are respectively slidably set on the inner wall of the top groove 102, near the middle of the rear side of the cover body 101. Two Z-shaped grooves 105 are slidably disposed on the inner walls of the two side grooves 105, two side grooves 110 are respectively opened on the inner walls of the two sides of the cover body 101, two side locking blocks 107 are respectively slidably disposed inside the two side grooves 110, two side locking slots 108 are respectively opened on the opposite side end faces of the two side locking blocks 107, two first inner grooves 111 are respectively opened on the rear inner walls of the two side grooves 110, two first folding rods 117 are respectively slidably disposed inside the two first inner grooves 111, two first semicircular blocks 113 are respectively fixedly disposed on the opposite side inner walls of the two first inner grooves 111, and two second inner grooves 112 are respectively opened on the inner walls of the two side grooves 111. Two side grooves 110 have their front inner walls slopingly fitted with two second folding rods 118, and two second semicircular blocks 114 are fixedly fitted with their opposite inner walls. Multiple movable grooves 124 are equidistantly formed on the outer end face of the cover body 101. Two first flexible pieces 119 are fixedly fitted between the two first folding rods 117 and the two short locking blocks 104. Two second flexible pieces 123 are fixedly fitted between the two first folding rods 117 and the two second folding rods 118, and two second flexible pieces 123 are slopably fitted between the two side locking blocks 104. Inside the 7, four circular grooves 109 are respectively opened on the front and rear sides of the bottom surface of the cover body 101. Four pillar blocks 301 are respectively fixedly installed inside the four circular grooves 109. Four first square grooves 115 are respectively opened on the front and rear sides of the opposite end faces of the two side blocks 107. Four first springs 116 are respectively fixedly installed between the four first square grooves 115 and the two side grooves 110. Two first square grooves 115 are respectively opened on the rear end faces of the two short blocks 104. Two second springs 121 are respectively fixedly installed between the two second square grooves 122 and the top groove 102.

[0037] The steps of using this invention are as follows: When it is necessary to move the short locking block 104 and the side locking block 107, the slider 106 drives the short locking block 104 to slide inside the top groove 102, and the slider 106 slides inside the Z-groove 105, allowing the short locking block 104 to move first towards the center and then towards the rear. At this time, the short locking block 104 will pull the first folding rod 117 through the first soft sheet 119. When the first folding rod 117 moves inside the first inner groove 111, the first folding rod 117 will be squeezed by the first semi-circular block 113. At this time, the first folding rod 117, along with the side locking block 107, slides into the side groove 110. The first folding rod 117 pulls the second folding rod 118 through the second soft plate 123. The second folding rod 118 slides inside the second slide groove. The second folding rod 118 is squeezed by the second semi-circular block 114. The second folding rod 118 squeezes the other side of the side locking block 107, so that the side locking block 107 is fully retracted into the side groove 110. At this time, the hexagonal hole plate 7 can be placed into the cover body 101. Then, slide the slider 106. The short locking block 104 is pushed out of the top groove 102 by the second spring 121. The side locking block 107 is pushed out of the side groove 110 by the first spring 116, thus realizing the locking and fixing of the hexagonal hole plate 7.

[0038] Example 3, please refer to Figure 8 The difference from embodiment 2 is that the fish scale mechanism 2 includes multiple fish scale plates 201, and each of the multiple fish scale plates 201 has a movable block 202 on its end face. By overlapping and adhering the fish scales, the problem of static sealing strips hardening and cracking due to long-term vibration fatigue and oil immersion is effectively solved.

[0039] Furthermore, multiple movable blocks 202 are fixedly disposed on opposite end faces of multiple fish scale plates 201, and multiple movable blocks 202 are slidably disposed inside multiple movable slots 124, with the fish scale plates 201 stacked together.

[0040] The invention operates as follows: A high-frequency, micro-amplitude relative motion is generated between the cover and the base. The fish-scale plate 201 is no longer passively compressed but periodically moved. When the cover moves away from the base instantaneously, the base of the fish-scale plate 201 slightly expands due to adsorption or inertia. External air pressure may cause a small amount of air to rush in. When the cover moves closer instantaneously, the fish-scale plate 201 is more forcefully flattened and slides laterally. This tiny lateral sliding is like countless small wipers continuously scraping the contact surface. Oil and moisture cannot adhere stably and are gradually pumped out, preventing the formation of an oil or water film that penetrates the sealing layer. The greater the vibration, the more obvious this dynamic scraping effect, thus achieving dynamic sealing reinforcement. The entire lip is pre-compressed during installation, and the behavior under vibration is superimposed on this pre-tightening force, solving the problem of static sealing strips failing due to long-term vibration fatigue, oil immersion, hardening, and cracking.

[0041] Example 4, please refer to Figures 9 to 11The difference from embodiment 3 is that the four auxiliary mechanisms 3 include four pillars 301, four rocker arms 303 and four fixing plates 307. Each of the four pillars 301 has a mass block 309 inside and a limiting post 308 inside. Through the cooperation of the mass block 309 and rocker arms 303 inside the auxiliary mechanisms 3, the force of the cover vibration radiation noise is suppressed from the source of noise.

[0042] Specifically, the end face of the column block 301 has a slot 302, the end face of the mass block 309 has a connecting slot 310, the rocker arm 303 is disposed inside the connecting slot 310, the end face of the rocker arm 303 is connected to the fulcrum block 305, the end face of the rocker arm 303 is provided with a connecting block 304, the connecting block 304 is provided with a traction block 306, the traction block 306 is connected to the fixing plate 307, and the end face of the limiting column 308 has four limiting slots 311.

[0043] Furthermore, four mass blocks 309 are slidably sleeved on the inner walls of four column blocks 301, four limiting columns 308 are fixedly installed between the inner bottom and inner top surfaces of the four column blocks 301, four slots are respectively opened on the opposite end faces of the four column blocks 301, four connecting slots 310 are respectively opened on the end faces of the four mass blocks 309 near the slots 302, four rocker arms 303 are respectively hinged inside the four connecting slots 310, four fulcrum blocks 305 are respectively hinged on the lower end faces of the four rocker arms 303 near the column blocks 301, four connecting blocks 304 are respectively fixed on the lower side of the end faces of the four rocker arms 303 away from the column blocks 301, four traction blocks 306 are respectively hinged inside the four connecting blocks 304, four fixing pieces 307 are respectively fixed on the lower end faces of the four traction blocks 306, all four fixing pieces 307 are fixed on the inner bottom surface of the cover body 101, and four limiting slots 311 are equidistantly opened on the outer end faces of the limiting columns 308.

[0044] The steps of using this invention are as follows: When the engine vibration forces the cover body 101 to move, the cover body 101 pulls the rocker arm 303 through the output end of the rocker arm 303. Due to the offset of the fulcrum of the rocker arm 303, the mass block 309 at the other end of the rocker arm 303 will be pushed downward. The two forces cancel each other out at the fulcrum of the rocker arm 303, thereby significantly reducing the vibration amplitude of the cover body at this frequency.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foamed aluminum-based sound insulation cover for an automotive engine compartment, comprising a cover mechanism (1), characterized in that: The outer end of the cover mechanism (1) is provided with a fish scale mechanism (2), the inside of the cover mechanism (1) is provided with four auxiliary mechanisms (3), the end face of the cover mechanism (1) is provided with multiple fixing blocks (6), the multiple fixing blocks (6) are connected with a zig-shaped card block (5), the inside of the cover mechanism (1) is provided with a hexagonal perforated plate (7), and the inner wall of the hexagonal perforated plate (7) is provided with multiple vortex foam aluminum (8); The cover mechanism (1) includes a cover body (101), two short locking blocks (104) and two side locking blocks (107). The end face of the cover body (101) has two Z-shaped grooves (105). The end faces of the two short locking blocks (104) are provided with sliders (106). The two side locking blocks (107) are provided with first folding rods (117) and second folding rods (118). The outer end face of the cover body (101) has multiple movable grooves (124). The fish scale mechanism (2) includes multiple fish scale plates (201), and each of the multiple fish scale plates (201) has a movable block (202) on its end face. The four auxiliary mechanisms (3) include four pillars (301), four rocker arms (303) and four fixing plates (307). Each of the four pillars (301) has a mass block (309) inside and a limiting column (308) inside.

2. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The cover mechanism (1) is provided with a sealing plate of aluminum foam (4) inside, and a triangular block (9) is provided on the inner wall of the cover mechanism (1).

3. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The inner wall of the cover body (101) is provided with a top groove (102), and a cross block (103) is provided inside the top groove (102). The cross block (103) is slidably disposed inside two short card blocks (104).

4. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The two short card blocks (104) are provided with top card slots (120) on their end faces, the two sliders (106) are respectively disposed inside the two Z-shaped slots (105), and the two short card blocks (104) are disposed inside the top slots (102).

5. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The inner wall of the cover body (101) has two side grooves (110), and two side locking blocks (107) are respectively disposed inside the two side grooves (110). The end faces of the two side locking blocks (107) are provided with side locking grooves (108).

6. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 5, characterized in that: The inner walls of the two side grooves (110) are provided with a first inner groove (111), and the inner walls of the two side grooves (110) are provided with a second inner groove (112). The two first folding rods (117) are respectively disposed inside the two first inner grooves (111), and the two second folding rods (118) are respectively disposed inside the two second inner grooves (112).

7. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 6, characterized in that: Each of the two first inner grooves (111) is provided with a first semicircular block (113), and each of the two second inner grooves (112) is provided with a second semicircular block (114). The two first semicircular blocks (113) are respectively provided inside the two first folding rods (117), and the two second semicircular blocks (114) are respectively provided inside the two second folding rods (118).

8. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: A first soft sheet (119) is provided between each of the two short card blocks (104) and the two first folding rods (117), and a second soft sheet (123) is provided between each of the two first folding rods (117) and the second folding rod (118). The two second soft sheets (123) are respectively provided inside the two side card blocks (107).

9. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The inner wall of the cover body (101) is provided with four circular grooves (109), and the end faces of the two side blocks (107) are provided with two first square grooves (115). The inner walls of the four first square grooves (115) are provided with first springs (116), and the end faces of the two short blocks (104) are provided with two second square grooves (122). The inner walls of the two second square grooves (122) are provided with second springs (121).

10. The automotive engine compartment sound insulation cover based on aluminum foam according to claim 1, characterized in that: The end face of the column block (301) is provided with a slot (302), the end face of the mass block (309) is provided with a connecting slot (310), the rocker arm (303) is disposed inside the connecting slot (310), the end face of the rocker arm (303) is connected to a fulcrum block (305), the end face of the rocker arm (303) is provided with a connecting block (304), the connecting block (304) is provided with a traction block (306), the traction block (306) and the fixing plate (307) are connected and disposed, and the end face of the limiting column (308) is provided with four limiting slots (311).

Images