Non-woven fabric engine sound insulation pad convenient to disassemble

Abstract

The utility model belongs to the technical field of non-woven fabric structures, and particularly relates to a non-woven fabric engine sound insulation pad convenient to disassemble, which comprises a non-woven fabric layer, a connecting ring and a fixing ring, and the connecting ring is fixedly arranged on the edge of the non-woven fabric layer; the fixing ring is attached to the engine shell in an adsorption mode. Wherein the end portions, opposite to each other, of the connecting ring and the fixing ring are detachably connected through an inflation mechanism, an air cavity used for buffering noise generated by high-frequency vibration of the engine shell is formed in the inflation mechanism, and a vacuum suction ring used for being tightly attached to the engine shell in an adsorption mode is arranged at the end portion, back on to the air cavity, of the fixing ring. When the inflation mechanism is connected, an internal air cavity expands, so that the connecting ring and the fixing ring are tightly pressed, dual fixation is realized by matching with vacuum adsorption, separation can be realized by deflating during disassembly, and no residual glue is left; the air cavity absorbs high-frequency energy through air deformation when the engine vibrates, vibration transmission is actively restrained, and the sound insulation and vibration reduction effects are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of non-woven fabric structure technology, and in particular relates to a non-woven fabric engine sound insulation pad that is easy to disassemble. Background Technology

[0002] In the automotive engine field, sound insulation pads are commonly installed on the engine casing to effectively reduce the transmission of engine noise into the passenger compartment. Currently, most sound insulation pads are made of non-woven fabric or other sound-absorbing materials and are designed as a single unit. These pads are primarily secured to the engine casing via snap-fit ​​mechanisms or an adhesive layer applied to their edges. The snap-fit ​​mechanism is fixed by engaging corresponding mounting holes on the engine casing, while the adhesive layer is directly adhered to the corresponding surface of the engine casing.

[0003] However, the aforementioned existing technical solutions have significant shortcomings. First, when using clips for fixing, the edge area of ​​the sound insulation pad between adjacent clips lacks effective constraint, easily forming gaps with the engine housing surface. This allows noise to leak through these loosely fitted gaps, weakening the overall sound insulation effect. Second, the method of fixing using adhesive layers suffers from aging and failure over time due to environmental factors (such as high temperature, oil stains, and vibration), causing the sound insulation pad to detach from the engine housing and lose its sound insulation function. Furthermore, when the sound insulation pad needs to be replaced, the aged adhesive layer easily leaves difficult-to-remove residue on the engine housing surface. These residues not only affect aesthetics but also adversely affect the fit and adhesion of the new sound insulation pad. Utility Model Content

[0004] The purpose of this utility model is to provide a convenient disassembly non-woven engine sound insulation pad, which aims to solve the technical problems of unstable structure and poor sound insulation effect of existing car engine sound insulation pads assembled by snaps and adhesives.

[0005] To achieve the above objectives, this utility model provides a conveniently detachable non-woven fabric engine sound insulation pad, comprising a non-woven fabric layer, a connecting ring, and a fixing ring. The connecting ring is fixedly disposed on the edge of the non-woven fabric layer; the fixing ring is adsorbed and adhered to the engine housing; wherein, the ends of the connecting ring and the fixing ring opposite to each other are detachably connected by an inflation mechanism, the inflation mechanism is provided with an air cavity for buffering noise generated by high-frequency vibration of the engine housing, and the end of the fixing ring facing away from the air cavity is provided with a vacuum suction ring for adsorbing and adhering tightly to the engine housing.

[0006] Optionally, the connecting ring extends along the edge of the nonwoven fabric layer in a ring-shaped structure. The connecting ring includes a first connecting portion and a second connecting portion, which are concentrically stacked. The first connecting portion is fixedly connected to the nonwoven fabric layer, and the second connecting portion is detachably connected to the fixing ring. The inflation mechanism is disposed on the second connecting portion. An inflation channel is provided at the end of the first connecting portion. The input end of the inflation channel is disposed on the side wall of the first connecting portion, and the output end of the inflation channel extends to the input end of the inflation mechanism.

[0007] Optionally, the inflation mechanism includes a guide seat and an airbag. The guide seat has a first connecting portion fixedly disposed at one end facing away from the nonwoven fabric layer. The input end of the airbag is disposed within the guide seat. The guide seat has an air supply channel formed therein, which communicates with the input end of the airbag. The airbag has an annular structure. One end of the airbag is fixedly disposed within the guide seat and communicates with the air supply channel. The other end of the airbag has a circular annular cross-section and is adapted to the shape of the air cavity when inflated.

[0008] Optionally, the second connecting portion includes an inner ring and an outer ring, both of which are arranged in a ring structure and are concentric with the first connecting portion. The inner ring is disposed in the inner ring of the guide seat and is fixedly connected to the end face of the first connecting portion facing away from the nonwoven fabric layer. The outer ring is sleeved on the outer ring of the guide seat and is fixedly connected to the end face of the first connecting portion facing away from the nonwoven fabric layer. Magnetic attraction mechanisms are provided on the inner and outer rings for adsorbing and sticking to the fixing ring.

[0009] Optionally, the magnetic attraction mechanism includes a first magnetic ring, a second magnetic ring, a third magnetic ring, and a fourth magnetic ring. The first magnetic ring and the second magnetic ring are embedded on the end faces of the inner ring and the outer ring facing away from the first connecting portion, and the third magnetic ring and the fourth magnetic ring are embedded on the end face of the fixing ring facing the second connecting portion. The ends of the first magnetic ring and the third magnetic ring that are opposite to each other have opposite magnetic poles, and the ends of the second magnetic ring and the fourth magnetic ring that are opposite to each other have opposite magnetic poles.

[0010] Optionally, the magnetic attraction mechanism includes a first magnetic ring and a second magnetic ring, the first magnetic ring and the second magnetic ring being embedded on the end faces of the inner ring and the outer ring facing away from the first connecting part, and the end of the fixing ring near the first magnetic ring and the second magnetic ring being made of a magnetically conductive metal material.

[0011] Optionally, the air cavity is formed at the end of the fixed ring facing away from the vacuum suction ring, and the opening of the air cavity is formed at the end of the fixed ring facing the connecting ring.

[0012] Optionally, the vacuum suction ring has a conical groove formed at its middle position, facing away from the fixed ring.

[0013] Optionally, the vacuum suction ring includes a first silicone ring and a second silicone ring, the first silicone ring and the second silicone ring being concentrically arranged along the edge of the fixing ring, the outer diameter of the first silicone ring being larger than that of the second silicone ring, the second silicone ring being formed in the inner ring of the first silicone ring, and the tapered groove being formed between the first silicone ring and the second silicone ring.

[0014] Optionally, the edge of the first silicone ring is fixedly connected to the bottom corner of the outer ring sidewall of the fixed ring, and the edge of the second silicone ring is fixedly connected to the bottom corner of the inner ring sidewall of the fixed ring.

[0015] The above-mentioned technical solutions of one or more of the convenient disassembly non-woven engine sound insulation pads provided in this utility model embodiment have at least one of the following technical effects: the vacuum suction ring actively adsorbs onto the surface of the engine housing, forming a continuous and gapless physical seal, completely eliminating the noise leakage problem caused by the snap-fit ​​fixation, while avoiding the risk of adhesive layer aging and falling off; when the inflation mechanism is connected, the internal air cavity expands, making the connecting ring and the fixing ring tightly pressed together, and achieving double fixation with vacuum adsorption. When disassembling, the air can be released to separate them without leaving any adhesive residue; when the engine vibrates, the air cavity absorbs high-frequency energy through gas deformation, actively suppressing vibration transmission and significantly improving the sound insulation and vibration reduction effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of a non-woven engine sound insulation pad for easy disassembly provided in an embodiment of this utility model.

[0018] Figure 2 An exploded view of the structure of the non-woven engine sound insulation pad for easy disassembly provided in this embodiment of the utility model.

[0019] Figure 3 This is a schematic diagram of a non-woven engine sound insulation pad made of magnetically conductive metal material that is easy to disassemble, according to another embodiment of the present invention.

[0020] The following are the labeling elements in the figure:

[0021] 100—Non-woven fabric layer; 200—Connecting ring; 300—Fixing ring

[0022] 400—Inflation mechanism; 500—Air chamber; 600—Vacuum suction ring

[0023] 210—First connecting part; 220—Second connecting part; 230—Inflation channel

[0024] 410—Guide seat; 420—Airbag; 430—Air delivery channel

[0025] 221—Inner Ring; 222—Outer Ring; 700—Magnetic Mechanism

[0026] 710—First magnetic ring; 720—Second magnetic ring; 730—Third magnetic ring

[0027] 740—Fourth magnetic ring; 630—Conical groove; 610—First silicone ring

[0028] 620—Second silicone ring. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-3 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In one embodiment of this utility model, such as Figures 1-3 As shown, a non-woven fabric engine sound insulation pad that is easy to disassemble is provided, including a non-woven fabric layer 100, a connecting ring 200, and a fixing ring 300. The connecting ring 200 is fixedly disposed on the edge of the non-woven fabric layer 100; the fixing ring 300 is adsorbed and attached to the engine housing; wherein, the ends of the connecting ring 200 and the fixing ring 300 that are opposite to each other are detachably connected by an inflation mechanism 400. The inflation mechanism 400 is provided with an air chamber 500 for buffering noise generated by high-frequency vibration of the engine housing, and the end of the fixing ring 300 facing away from the air chamber 500 is provided with a vacuum suction ring 600 for adsorbing and adhering tightly to the engine housing.

[0034] Specifically, when the sound insulation pad needs to be installed, the fixing ring 300 is first pressed and tightened onto the surface of the engine housing by the vacuum suction ring 600. The inflation mechanism 400, which is in an uninflated state, along with the connecting ring 200, is aligned with the air cavity 500, so that the end of the inflation mechanism 400 extends into the air cavity 500. At this time, gas is input into the inflation mechanism 400, and the end of the inflation mechanism 400 expands to fill the air cavity 500, thereby forming a snap-fit ​​structure and completing the fixed connection between the connecting ring 200 and the fixing ring 300. When the non-woven fabric layer 100 needs to be replaced, the gas in the inflation mechanism 400 is first released, so that the inflation mechanism 400 returns to an uninflated state, and then the connecting ring 200 can be removed from the fixing ring 300.

[0035] The vacuum suction ring 600 actively adheres to the surface of the engine housing, forming a continuous and gapless physical seal, completely eliminating noise leakage caused by clip-on fixing, while avoiding the risk of adhesive layer aging and falling off; when the inflation mechanism 400 is connected, the internal air chamber 500 expands, causing the connecting ring 200 and the fixing ring 300 to be tightly pressed together, achieving double fixation with vacuum adsorption. When disassembling, the air can be released to separate the parts without leaving any adhesive residue; when the engine vibrates, the air chamber 500 absorbs high-frequency energy through gas deformation, actively suppressing vibration transmission and significantly improving sound insulation and vibration reduction effects.

[0036] like Figures 1-3As shown, in another embodiment of this utility model, the connecting ring 200 extends along the edge of the nonwoven fabric layer 100 in a ring-shaped structure. The connecting ring 200 includes a first connecting portion 210 and a second connecting portion 220, which are concentrically stacked. The first connecting portion 210 is fixedly connected to the nonwoven fabric layer 100, and the second connecting portion 220 is detachably connected to the fixing ring 300. The inflation mechanism 400 is disposed on the second connecting portion 220. An inflation channel 230 passes through the end of the first connecting portion 210. The input end of the inflation channel 230 is disposed on the side wall of the first connecting portion 210, and the output end of the inflation channel 230 extends to the input end of the inflation mechanism 400. Gas is input through the inflation channel 230 located on the side wall of the first connecting portion 210 and transported through the channel to the inflation mechanism 400 disposed on the second connecting portion 220. The layered design allows the nonwoven layer 100 to be securely connected through the first connecting part 210, while the detachable second connecting part 220 facilitates separation from the fixing ring 300 through the inflation mechanism 400, simplifying the replacement operation of the nonwoven layer 100; the inflation channel 230 provided on the side wall facilitates the gas injection operation.

[0037] like Figures 1-3 As shown, in another embodiment of this utility model, the inflation mechanism 400 includes a guide seat 410 and an airbag 420. The guide seat 410 is fixedly provided with one end of the first connecting portion 210 facing away from the nonwoven fabric layer 100. The input end of the airbag 420 is disposed in the guide seat 410. The guide seat 410 is formed with an air supply channel 430, which communicates with the input end of the airbag 420. The airbag 420 is arranged in a ring shape. One end of the airbag 420 is fixedly disposed in the guide seat 410 and communicates with the air supply channel 430. The other end of the airbag 420 has a circular cross-section and is adapted to the shape of the air cavity 500 in the inflated state. Gas enters the airbag 420 through the air supply channel 430 of the guide seat 410. The airbag 420 inflates and expands, and its cross-sectional shape changes until it fills the space of the air cavity 500 on the fixed ring 300. The guide seat 410 ensures that the airbag 420 is inflated in the correct direction. After the airbag 420 is inflated, it accurately fills and fits the shape of the air cavity 500, forming a tight snap-fit ​​structure to achieve reliable connection and sealing. The annular airbag 420 design ensures that the connecting ring 200 and the fixing ring 300 are subjected to uniform force in the circumference.

[0038] like Figures 1-3As shown, in another embodiment of this utility model, the second connecting portion 220 includes an inner ring 221 and an outer ring 222. Both the inner ring 221 and the outer ring 222 are arranged in a ring shape and are concentrically arranged with the first connecting portion 210. The inner ring 221 is disposed in the inner ring of the guide seat 410 and is fixedly connected to the end face of the first connecting portion 210 facing away from the non-woven fabric layer 100. The outer ring 222 is sleeved on the outer ring of the guide seat 410 and is fixedly connected to the end face of the first connecting portion 210 facing away from the non-woven fabric layer 100. Magnetic attraction mechanisms 700 are provided on the inner ring 221 and the outer ring 222 for adsorbing and adhering to the fixing ring 300. The magnetic attraction mechanism 700 generates magnetic force, enabling the inner ring 221 and the outer ring 222 to adsorb and adhere to the corresponding positions of the fixing ring 300 even when not inflated. The magnetic attraction mechanism 700 provides initial positioning and pre-tightening force before inflation connection, assists in the alignment of the airbag 420 and the air chamber 500, ensures a smooth inflation process and accurate connection position, and improves installation convenience and initial stability.

[0039] like Figures 1-3 As shown, in another embodiment of this utility model, the magnetic attraction mechanism 700 includes a first magnetic ring 710, a second magnetic ring 720, a third magnetic ring 730, and a fourth magnetic ring 740. The first magnetic ring 710 and the second magnetic ring 720 are embedded on the end faces of the inner ring 221 and the outer ring 222 facing away from the first connecting portion 210. The third magnetic ring 730 and the fourth magnetic ring 740 are embedded on the end face of the fixing ring 300 facing the second connecting portion 220. The opposing ends of the first magnetic ring 710 and the third magnetic ring 730 have opposite magnetic poles, and the opposing ends of the second magnetic ring 720 and the fourth magnetic ring 740 have opposite magnetic poles. When the second connecting portion 220 approaches the fixing ring 300, the first magnetic ring 710 and the third magnetic ring 730, and the second magnetic ring 720 and the fourth magnetic ring 740, generate a magnetic force that attracts each other due to their opposite magnetic poles. With multiple correspondingly set opposite magnetic poles, a strong adsorption force is automatically generated when the connecting ring 200 and the fixing ring 300 are close together, realizing fast and accurate pre-positioning and pre-fitting, which greatly simplifies the installation and alignment process.

[0040] like Figures 1-3As shown, in another embodiment of this utility model, the magnetic attraction mechanism 700 includes a first magnetic ring 710 and a second magnetic ring 720. The first magnetic ring 710 and the second magnetic ring 720 are embedded on the end faces of the inner ring 221 and the outer ring 222 facing away from the first connecting portion 210. The end of the fixing ring 300 near the first magnetic ring 710 and the second magnetic ring 720 is made of a magnetically conductive metal material. The magnetic field of the first magnetic ring 710 and the second magnetic ring 720 embedded on the second connecting portion 220 (inner ring 221 / outer ring 222) attracts the corresponding part of the fixing ring 300 made of magnetically conductive metal. This simplifies the structure of the fixing ring 300, eliminating the need to embed magnets on it. Magnetic attraction and pre-positioning can be achieved simply by using magnetically conductive metal, reducing manufacturing costs and complexity while maintaining the pre-positioning function.

[0041] like Figures 1-3 As shown, in another embodiment of this utility model, the air cavity 500 is formed at the end of the fixing ring 300 facing away from the vacuum suction ring 600, and the opening of the air cavity 500 is formed at the end of the fixing ring 300 facing the connecting ring 200. After the airbag 420 is inflated, it enters from the opening end of the fixing ring 300 facing the connecting ring 200 and fills the internal space of the air cavity 500. The air cavity 500 is directly integrated inside the fixing ring 300, resulting in a compact structure; the opening direction is clearly towards the connecting ring 200, facilitating the inflation insertion and filling of the airbag 420, and optimizing the operation path and efficiency of the inflation connection.

[0042] like Figures 1-3 As shown, in another embodiment of this invention, a conical groove 630 facing away from the fixing ring 300 is formed at the middle position of the vacuum suction ring 600. When the vacuum suction ring 600 is pressed against the engine housing surface, the air in the area of ​​the conical groove 630 is squeezed out, forming a negative pressure zone. The structure of the conical groove 630 helps to more effectively expel air during pressing, forming a stronger local negative pressure, thereby significantly enhancing the adsorption force and sealing reliability of the vacuum suction ring 600 on the engine housing surface.

[0043] In another embodiment of this utility model, the vacuum suction ring 600 includes a first silicone ring 610 and a second silicone ring 620. The first silicone ring 610 and the second silicone ring 620 are concentrically arranged along the edge of the fixing ring 300. The outer diameter of the first silicone ring 610 is larger than that of the second silicone ring 620. The second silicone ring 620 is formed in the inner ring of the first silicone ring 610. The conical groove 630 is formed between the first silicone ring 610 and the second silicone ring 620. The two silicone rings simultaneously press against the surface of the engine housing. The conical groove 630 is located between the two rings. During pressing, the two rings deform and seal, and a negative pressure is formed in the area of ​​the conical groove 630. The first silicone ring 610 and the second silicone ring 620 form two sealing rings, enhancing the overall sealing effect. The conical groove 630 structure between the two rings works synergistically to generate the required negative pressure more efficiently, improve adsorption stability, and better adapt to slight unevenness on the surface of the housing.

[0044] like Figures 1-3 As shown, in another embodiment of this utility model, the edge of the first silicone ring 610 is fixedly connected to the bottom corner of the outer ring sidewall of the fixing ring 300, and the edge of the second silicone ring 620 is fixedly connected to the bottom corner of the inner ring sidewall of the fixing ring 300. The first silicone ring 610 and the second silicone ring 620 are respectively firmly connected to the bottom corners of the outer and inner edges of the fixing ring 300. This connection method ensures that the silicone rings are subjected to uniform force during pressing and adsorption, making them less prone to detachment or deformation failure, thus improving the overall durability and long-term sealing performance of the vacuum suction ring 600 structure.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A conveniently removable non-woven fabric engine sound insulation pad, characterized in that, include: Non-woven fabric layer; A connecting ring is fixedly disposed on the edge of the nonwoven fabric layer; A retaining ring, which is adsorbed and attached to the engine housing; The connecting ring and the fixing ring are detachably connected at opposite ends via an inflation mechanism. The inflation mechanism has an air chamber for buffering noise generated by high-frequency vibration of the engine housing. The end of the fixing ring facing away from the air chamber has a vacuum suction ring for adsorbing and adhering to the engine housing.

2. The easily removable non-woven engine sound insulation pad according to claim 1, characterized in that: The connecting ring extends along the edge of the nonwoven fabric layer in a ring-shaped structure. The connecting ring includes a first connecting part and a second connecting part, which are concentrically stacked. The first connecting part is fixedly connected to the nonwoven fabric layer, and the second connecting part is detachably connected to the fixing ring. The inflation mechanism is disposed on the second connecting part. An inflation channel is provided at the end of the first connecting part. The input end of the inflation channel is disposed on the side wall of the first connecting part, and the output end of the inflation channel extends to the input end of the inflation mechanism.

3. The easily removable non-woven engine sound insulation pad according to claim 2, characterized in that: The inflation mechanism includes a guide seat and an air bladder. The guide seat has a first connecting portion fixedly disposed at one end facing away from the non-woven fabric layer. The input end of the air bladder is disposed within the guide seat. The guide seat has an air supply channel formed therein, which is connected to the input end of the air bladder. The air bladder has an annular structure. One end of the air bladder is fixedly disposed within the guide seat and is connected to the air supply channel. The other end of the air bladder has a circular annular cross-section and is adapted to the shape of the air cavity when inflated.

4. The easily removable non-woven engine sound insulation pad according to claim 3, characterized in that: The second connecting part includes an inner ring and an outer ring, both of which are ring-shaped and concentric with the first connecting part. The inner ring is disposed in the inner ring of the guide seat and is fixedly connected to the end face of the first connecting part facing away from the nonwoven fabric layer. The outer ring is sleeved on the outer ring of the guide seat and is fixedly connected to the end face of the first connecting part facing away from the nonwoven fabric layer. Magnetic attraction mechanisms are provided on the inner and outer rings for adsorbing and sticking to the fixing ring.

5. The easily removable non-woven engine sound insulation pad according to claim 4, characterized in that: The magnetic attraction mechanism includes a first magnetic ring, a second magnetic ring, a third magnetic ring, and a fourth magnetic ring. The first magnetic ring and the second magnetic ring are embedded on the end faces of the inner ring and the outer ring facing away from the first connecting part. The third magnetic ring and the fourth magnetic ring are embedded on the end face of the fixed ring facing the second connecting part. The ends of the first magnetic ring and the third magnetic ring that are opposite to each other have opposite magnetic poles, and the ends of the second magnetic ring and the fourth magnetic ring that are opposite to each other have opposite magnetic poles.

6. The easily removable non-woven engine sound insulation pad according to claim 4, characterized in that: The magnetic attraction mechanism includes a first magnetic ring and a second magnetic ring. The first magnetic ring and the second magnetic ring are embedded on the end faces of the inner ring and the outer ring facing away from the first connecting part. The end of the fixing ring near the first magnetic ring and the second magnetic ring is made of magnetically conductive metal material.

7. The easily removable non-woven engine sound insulation pad according to claim 1, characterized in that: The air cavity is formed at the end of the fixed ring facing away from the vacuum suction ring, and the opening of the air cavity is formed at the end of the fixed ring facing the connecting ring.

8. The easily removable non-woven engine sound insulation pad according to claim 7, characterized in that: The vacuum suction ring has a conical groove formed at its middle position, facing away from the fixed ring.

9. The easily removable non-woven engine sound insulation pad according to claim 8, characterized in that: The vacuum suction ring includes a first silicone ring and a second silicone ring, which are concentrically arranged along the edge of the fixing ring. The outer diameter of the first silicone ring is larger than that of the second silicone ring. The second silicone ring is formed on the inner ring of the first silicone ring, and the tapered groove is formed between the first silicone ring and the second silicone ring.

10. The easily removable non-woven engine sound insulation pad according to claim 9, characterized in that: The edge of the first silicone ring is fixedly connected to the bottom corner of the outer ring sidewall of the fixed ring, and the edge of the second silicone ring is fixedly connected to the bottom corner of the inner ring sidewall of the fixed ring.

Images