Sound insulation and noise reduction structure, sound insulation and noise reduction device and vehicle

Abstract

The utility model relates to a sound insulation and noise reduction structure, a sound insulation and noise reduction device and a vehicle, and relates to the technical field of automobiles. The sound insulation and noise reduction structure comprises a first component and a second component, the first component is provided with a cavity, a first through hole is formed in the first surface of the first component, and the first through hole is communicated with the cavity; the second part is of a porous structure, one side of the second part is connected with the first surface, and the other side of the second part is connected with a noise source. The sound wave energy of different frequency bands can be consumed through the first part and the second part, and therefore the good sound insulation and noise reduction effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a sound insulation and noise reduction structure, a sound insulation and noise reduction device and a vehicle. BACKGROUND

[0002] An engine is a device for providing power for an automobile and is one of the core components of an automobile. The working process of an automobile engine mainly includes four strokes: an intake stroke in which a mixture is sucked into a cylinder, a compression stroke in which the mixture is compressed, a power stroke in which a spark plug ignites to push a piston to work, and an exhaust stroke in which exhaust gas after combustion is discharged from the cylinder. The engine reciprocates according to the four strokes, thereby providing power for the automobile.

[0003] With the combustion of fuel in the cylinder and the friction, impact and vibration generated when the piston, crankshaft, connecting rod, valve and other components work, the engine generates a large amount of noise when running. Noise reduces the comfort of the automobile. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides a sound insulation and noise reduction structure, which can reduce the noise transmitted by the engine to the outside, so as to at least solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a sound insulation and noise reduction structure is provided, which comprises a first component and a second component; the first component has a cavity, and a first surface of the first component is provided with a first through hole, the first through hole being in communication with the cavity; the second component is a porous structure, one side of the second component being connected with the first surface, and the other side being configured to be connected with a noise source.

[0006] Optionally, the first component comprises a body and a sound absorbing piece connected with the body, a surface of the sound absorbing piece away from the body being the first surface, and the cavity being arranged in the sound absorbing piece.

[0007] Optionally, the cavity has a plurality of cavities, and the first through hole has a plurality of first through holes, the plurality of first through holes being arranged in one-to-one correspondence with the plurality of cavities.

[0008] Optionally, the temperature resistance value of the first component is not less than 100 DEG C.

[0009] Optionally, the material of the first component is any one of the following materials: PA66, PA66+GF30, PP+GF30, PP+TD20.

[0010] Optionally, the temperature resistance value of the second component is not less than 100 DEG C.

[0011] Optionally, the material of the second component is any one of the following materials: polyurethane, polyvinyl alcohol, melamine.

[0012] Optionally, the second component is a foaming piece.

[0013] Optionally, the second component is detachably connected with the first component.

[0014] Optionally, the sound insulation and noise reduction structure further comprises a limiting piece and a connecting column, the limiting piece is provided with a second through hole, one end of the connecting column is connected with the first component, the other end passes through the second component and is in interference fit with the second through hole, and the limiting piece is in stop fit with the second component.

[0015] Optionally, the limiting piece is a sheet structure, a plurality of through grooves are arranged on the hole wall of the second through hole, the plurality of through grooves are arranged at intervals along the circumference of the second through hole, and the through grooves penetrate the limiting piece along the axial direction of the second through hole.

[0016] According to a second aspect of the present application, a sound insulation and noise reduction device is provided, which is applied to an engine. Optionally, the sound insulation and noise reduction device comprises the above-mentioned sound insulation and noise reduction structure, and the side, away from the first surface, of the second component is provided with a profiled surface, and the inner wall of the profiled surface is configured to be fitted with the outer surface of the cylinder head of the engine.

[0017] Optionally, the sound insulation and noise reduction device further comprises a heat conducting piece, and the heat conducting piece is arranged on the side, away from the second component, of the first component.

[0018] Optionally, the heat conducting piece is an aluminum foil.

[0019] Optionally, the thickness of the heat conducting piece is 0.5mm-10mm.

[0020] Optionally, the sound insulation and noise reduction device further comprises a first connecting assembly, and the first connecting assembly comprises a first screw, and the rod end of the first screw is in threaded connection with the first component after passing through the heat conducting piece.

[0021] Optionally, the first connecting assembly further comprises a nut, the nut is connected with the first component, and the rod end of the first screw is in threaded connection with the threaded hole of the nut after passing through the heat conducting piece.

[0022] Optionally, the outer peripheral surface of the nut is provided with a first connecting groove, and part of the first component extends into the first connecting groove and is connected with the inner wall of the first connecting groove.

[0023] Optionally, the first connecting groove extends in a ring shape along the circumference of the threaded hole.

[0024] Optionally, the sound insulation and noise reduction device further comprises a second screw, and the rod end of the second screw is configured to be in threaded connection with the cylinder head after passing through the first component.

[0025] Optionally, the sound insulation and noise reduction device further comprises a pressure-resistant bushing, the pressure-resistant bushing is embedded in the first component, and the rod end of the second screw is configured to be in threaded connection with the cylinder head after passing through the inner hole of the pressure-resistant bushing.

[0026] Optionally, the compression-resistant bushing comprises a cylinder body and a support ring arranged on the outer circumferential surface of the cylinder body, and the support ring is in contact with the cap portion of the second screw.

[0027] Optionally, the compression-resistant bushing comprises a cylinder body and a support ring arranged on the outer circumferential surface of the cylinder body, and the support ring is in contact with the cap portion of the second screw.

[0028] According to a third aspect of the present application, a vehicle is provided, which comprises an engine and the sound insulation and noise reduction device described above; the engine has a cylinder head; the profiled surface is attached to the outer surface of the cylinder head, and the first component is connected to the engine.

[0029] In the sound insulation and noise reduction structure of the embodiments of the present application, through the technical solutions described above, on the one hand, the sound wave energy of different frequency bands can be consumed by the first component and the second component respectively, so that a better sound insulation and noise reduction effect can be achieved. On the other hand, the energy of the middle-high frequency sound wave and the low frequency sound wave can be eliminated by the first component and the second component respectively, so as to widen the sound insulation and noise reduction structure of the sound elimination band, so that the coverage of the sound insulation and noise reduction structure to the working noise of the engine can be improved. In this way, the sound wave transmitted by the engine to the outside can be reduced.

[0030] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in 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 any creative effort on the basis of these drawings.

[0032] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0033] Figure 1 is a structural schematic diagram of the sound insulation and noise reduction structure provided in the exemplary embodiments of the present disclosure;

[0034] Figure 2 is a structural schematic diagram of the first component provided in the exemplary embodiments of the present disclosure;

[0035] Figure 3 is a structural schematic diagram of the connection part between the first component and the second component provided in the exemplary embodiments of the present disclosure;

[0036] Figure 4 is a side view of the limiting piece provided in the exemplary embodiments of the present disclosure;

[0037] Figure 5 is a structural schematic diagram of a sound insulation and noise reduction device provided in an exemplary embodiment of the present disclosure;

[0038] Figure 6 is Figure 5 is a sectional view of A-A in

[0039] Figure 7 is an exploded view of a sound insulation and noise reduction device provided in an exemplary embodiment of the present disclosure;

[0040] Figure 8 is a schematic diagram of a connection structure between a heat conduction member and a sound insulation and noise reduction structure provided in an exemplary embodiment of the present disclosure;

[0041] Figure 9 is a schematic diagram of a pressure-resistant bushing cooperating with a first component provided in an exemplary embodiment of the present disclosure;

[0042] Figure 10 is a structural block diagram of a vehicle provided in an exemplary embodiment of the present disclosure.

[0043] BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 1 - sound insulation and noise reduction structure;

[0045] 11 - first component; 111 - cavity; 112 - first surface; 113 - first through hole; 114 - body; 115 - sound absorption member;

[0046] 12 - second component;

[0047] 13 - limiting member; 131 - second through hole; 132 - through slot;

[0048] 14 - connecting column;

[0049] 2 - sound insulation and noise reduction device; 21 - profiling surface; 22 - heat conduction member;

[0050] 23 - nut; 231 - first connecting slot; 232 - threaded hole;

[0051] 24 - first screw; 25 - second screw;

[0052] 26 - pressure-resistant bushing; 261 - barrel; 262 - support ring; 263 - second connecting slot;

[0053] 3 - vehicle; 31 - engine; 311 - cylinder head. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0055] See also Figure 1 , Figure 1 Schematic diagram of the structure of a sound insulation and noise reduction structure 1 provided in an exemplary embodiment of the present disclosure. The embodiment of the present application provides a sound insulation and noise reduction structure 1. The sound insulation and noise reduction structure 1 includes a first component 11 and a second component 12. The first component 11 has a cavity 111. A first through-hole 113 is provided on a first surface 112 of the first component 11. The first through-hole 113 communicates with the cavity 111. The second component 12 has a porous structure. One side of the second component 12 is connected to the first surface 112. The other side is configured to connect to a noise source.

[0056] It is understood that the connection between the second component 12 and the noise source can be a direct connection between the second component 12 and the noise source, or an indirect connection between the second component 12 and the noise source through other components. Specifically, the connection between the second component 12 and the noise source can be abutting or contacting the second component 12 and the noise source, or the second component 12 and the noise source can be glued together.

[0057] It can be understood that the noise source is a component that needs to absorb and reduce the noise generated during its operation, such as the exhaust pipe of the engine 31, the cylinder head 311 of the engine 31, the gear transmission of the car, etc.

[0058] It can be understood that cavity 111 and first through-hole 113 form a Helmholtz resonant cavity. Specifically, when sound waves from a noise source enter the resonant cavity, the air within the cavity resonates, causing friction between the air and surrounding components. This friction consumes the energy of the sound waves, converting the vibration energy into heat energy, thereby achieving the effect of sound insulation and noise reduction. Cavity 111 and first through-hole 113 primarily eliminate the energy of mid- and high-frequency sound waves.

[0059] It can be understood that the porous structure of the second component 12 can be a structure formed by foaming with a foaming agent, or a structure formed by mechanical processing, or a structure formed by filling a plurality of heating metal wires during injection molding of a component, electrifying the heating metal wires after molding so that the metal wires are heat-melted to form a plurality of channels on the component, and then the metal wires are pulled out from the component to form a structure.

[0060] It can be understood that when the sound waves of the noise source enter the porous structure of the second component 12, the air vibrates in the porous structure, so that the air rubs against the hole wall. The friction consumes the energy of the sound waves, so that the vibration energy is converted into heat energy to achieve the effect of sound insulation and noise reduction. Among them, the porous structure mainly eliminates the energy of low-frequency sound waves.

[0061] Exemplarily, the second component 12 is glued with the first component 11, or the second component 12 is connected with the first component 11 through screws, or the second component 12 is clamped with the first component 11.

[0062] In the embodiment, by arranging the first component 11 with the cavity 111 and the first through hole 113 and the second component 12 with the porous structure, on the one hand, the sound wave energy of different frequency bands can be consumed by the first component 11 and the second component 12 respectively, so as to achieve better sound insulation and noise reduction effect. On the other hand, the energy of the middle-high frequency sound waves and the low-frequency sound waves can be eliminated by the first component 11 and the second component 12 respectively, so as to expand the sound elimination frequency band of the sound insulation and noise reduction structure 1, thereby the coverage of the sound insulation and noise reduction structure 1 to the working noise of the engine 31 can be improved. In this way, the sound waves transmitted from the engine 31 to the outside can be reduced, so as to improve the ride comfort of the automobile.

[0063] In addition, by arranging the first component 11 on the side of the second component 12 away from the noise source, the second component 12 with the porous structure can be protected by the first component 11, so as to improve the impact resistance of the sound insulation and noise reduction device 2.

[0064] Moreover, the noise generated by the engine 31 is mainly low-frequency noise, accompanied by middle-high frequency noise. The low-frequency noise has the characteristics of long wavelength and strong penetration, and is more likely to propagate and cause resonance. Therefore, in the embodiment, the second component 12 that absorbs low-frequency sound waves is arranged closer to the engine 31, so that the sound insulation and noise reduction structure 1 can first process the low-frequency sound waves emitted by the noise source. In this way, the low-frequency noise can be absorbed and weakened in the initial stage of noise propagation, so as to reduce the energy and intensity of the low-frequency noise propagation, thereby reducing the impact of the low-frequency noise on subsequent other components or structures.

[0065] Please refer to Figure 2 , Figure 2 is a structural schematic view of the first component 11 provided in the exemplary embodiment of the present disclosure. In some embodiments, the first component 11 includes a body 114 and an acoustic absorber 115 connected with the body 114. The surface of the acoustic absorber 115 away from the body 114 is a first surface 112. A cavity 111 is arranged in the acoustic absorber 115.

[0066] It can be understood that, since the second component 12 is a porous structure, it is difficult to arrange a connecting structure for fixing it to the noise source thereon, and therefore the connecting structure for fixing to the noise source is arranged on the first component 11. In addition, the first component 11 is also provided with a cavity 111 and a first through hole 113. If a connecting structure is directly formed on the first component 11 having the cavity 111 and the first through hole 113, the molding difficulty of the first component 11 will be increased.

[0067] Based on this, in the embodiment, the first component 11 is arranged as a body 114 and a sound absorption member 115, so that the connecting structure and the cavity 111 can be arranged on the body 114 and the sound absorption member 115, respectively. In this way, the body 114 and the sound absorption member 115 can be molded respectively, thereby reducing the molding difficulty of the first component 11.

[0068] Please refer to Figure 1 or Figure 2 In some embodiments, the cavity 111 has a plurality of cavities. The first through hole 113 has a plurality of first through holes. The plurality of first through holes 113 and the plurality of cavities 111 are arranged one by one.

[0069] Specifically, the plurality of cavities 111 can be arranged in a matrix. For example, when the sound insulation and noise reduction structure 1 is applied to the cylinder head 311 of the engine 31, the plurality of cavities 111 can be arranged in sequence along the direction of the length dimension of the cylinder head 311 and the direction of the width dimension of the cylinder head 311.

[0070] It can be understood that the size of each cavity 111 and each through hole 113 can be adjusted according to the noise frequency of the part of the noise source corresponding thereto.

[0071] In the embodiment, by arranging a plurality of cavities 111 and a plurality of through holes 113 to form a plurality of resonance cavities, the resonance cavities can be adjusted in size and shape to accurately control the sound waves of different parts of the noise source at different frequencies, i.e. each resonance cavity can be designed to optimize a specific frequency range, thereby more accurately absorbing sound waves from different parts of the noise source.

[0072] In some embodiments, the temperature resistance value of the first component 11 is not less than 100°C.

[0073] It can be understood that the temperature resistance value refers to the maximum temperature that the first component 11 can withstand for normal operation.

[0074] It can be understood that the operation of the noise source will involve an increase in temperature along with the generation of noise, especially for devices such as the engine 31 which have a high operating temperature. Based on this, in the embodiment, by the above arrangement, the heat resistance of the first component 11 can be ensured, so that the first component 11 can still operate normally at a high temperature, thereby effectively ensuring the reliability of its noise reduction and absorption.

[0075] In some embodiments, the material of the first component 11 is any one of the following materials: PA66, PA66+GF30, PP+GF30, PP+TD20.

[0076] It can be understood that PA66, also known as nylon 66, is a semi-crystalline thermoplastic plastic with a melting point of up to 252℃. Nylon 66 has high mechanical strength and excellent wear resistance and self-lubrication.

[0077] PA66+GF30 is a mixed material of nylon 66 with 30% by mass of glass fiber, which has a melting point of up to 255℃. The addition of 30% glass fiber to PA66 can improve the strength, stiffness, creep strength and dimensional stability of the material.

[0078] PP+GF30 is a mixed material of polypropylene with 30% by mass of glass fiber, which has a melting point of up to 165℃. By adding 30% glass fiber to polypropylene, the strength, stiffness, impact resistance and dimensional stability of the material can be improved, and its heat resistance can also be improved.

[0079] PP+TD20 is a mixed material of polypropylene with 20% by mass of talc, which has a melting point of up to 164℃. By adding 20% talc to polypropylene, the impact strength of the material is improved, making it more flexible and impact-resistant.

[0080] In some embodiments, the temperature resistance of the second component 12 is not less than 100℃.

[0081] It can be understood that the temperature resistance refers to the maximum temperature that the second component 12 can withstand to work normally.

[0082] It can be understood that the operation of the noise source will also involve an increase in temperature along with the generation of noise, especially for devices such as the engine 31, which have a high operating temperature. Based on this, in the present embodiment, by setting the above, the heat resistance of the second component 12 can be guaranteed, so that the second component 12 can still work normally at a higher temperature, thereby effectively ensuring the reliability of its noise reduction.

[0083] In some embodiments, the material of the second component 12 is any one of the following materials: polyurethane, polyvinyl alcohol, melamine.

[0084] It can be understood that polyurethane is a high molecular material with good mechanical properties and wear resistance. Polyurethane has a melting point of up to 180℃, for example, hard polyurethane.

[0085] Polyvinyl alcohol is a polymer with a melting point of up to 230°C, for example, fully hydrolyzed polyvinyl alcohol.

[0086] Melamine is a white monoclinic crystal with a melting point of up to 300°C.

[0087] In some embodiments, the second component 12 is a foamed piece.

[0088] It can be understood that the pore structure of the foamed material is relatively fine and rich, which can make the sound wave propagate in it affected by viscous resistance. Viscous resistance is caused by the viscous action between air and pore wall, which hinders the propagation of sound wave and makes the energy of sound wave gradually attenuate to achieve the effect of attracting noise reduction.

[0089] It can be understood that the second component 12 is formed by filling the foaming agent in the cavity of the mold and solidifying it.

[0090] Among them, the foaming agent includes but is not limited to: foamed polypropylene, PI light soft foam material, polyphenylene sulfide, semi-aromatic nylon, aliphatic nylon, polypropylene microcellular foaming material.

[0091] In some embodiments, the second component 12 is detachably connected with the first component 11. In this way, the maintainability of the sound insulation and noise reduction structure 1 can be improved, and the maintenance cost of the sound insulation and noise reduction structure 1 can be lower and the maintenance efficiency can be higher.

[0092] Please refer to Figure 3 , Figure 3 is a structure diagram of the connection part between the first component 11 and the second component 12 provided in the exemplary embodiments of the present disclosure. In some embodiments, the sound insulation and noise reduction structure 1 further comprises a limiting piece 13 and a connecting column 14. The limiting piece 13 is provided with a second through hole 131. One end of the connecting column 14 is connected with the first component 11, and the other end passes through the second component 12 and is interference fit with the second through hole 131. The limiting piece 13 is stop fit with the second component 12.

[0093] It can be understood that when the second component 12 is connected with the first component 11, the second component 12 is first installed on one side of the first component 11, so that the connecting column 14 passes through the second component 12, and then the limiting piece 13 is sleeved on the connecting column 14, so that the connecting column 14 is interference fit with the second through hole 131. Then push the limiting piece 13 like the second component 12, so that the limiting piece 13 abuts against the second component 12, thereby fixing the second component 12 on one side of the first component 11.

[0094] The interference fit between the connecting column 14 and the second through hole 131 can be that the connecting column 14 is a tapered column, and the radius gradually increases in the direction close to the first component 11; or the second through hole 131 is a tapered hole, and the hole diameter gradually increases in the direction close to the first component 11.

[0095] In the embodiment, through the above scheme, not only can the second component 12 be detachably connected with the first component 11, but also the installation position of the second component 12 can be positioned through the connecting column 14, so that the installation position precision of the second component 12 can be improved, and the assembly efficiency of the first component 11 and the second component 12 can be improved.

[0096] Please refer to Figure 4 , Figure 4 is a side view of the limiting piece 13 provided in the example embodiment of the present disclosure. In some embodiments, the limiting piece 13 is a sheet structure. A plurality of through grooves 132 are arranged on the hole wall of the second through hole 131. The plurality of through grooves 132 are arranged at intervals along the circumference of the second through hole 131. The through groove 132 penetrates the limiting piece 13 along the axial direction of the second through hole 131. In this way, not only can the interference fit between the connecting column 14 and the second through hole 131 be achieved, but also the size of the limiting piece 13 in the axial direction of the connecting column 14 can be controlled, so that the overall size of the sound insulation and noise reduction structure 1 can be controlled, thereby reducing the installation space requirement of the sound insulation and noise reduction structure 1 when applied to a noise source.

[0097] Please refer to Figure 5 and Figure 6 , Figure 5 is a structural schematic view of the sound insulation and noise reduction device 2 provided in the example embodiment of the present disclosure, Figure 6 is Figure 5 A-A cross-sectional view. The embodiment of the present application provides a sound insulation and noise reduction device 2 applied to an engine 31. The sound insulation and noise reduction device 2 includes the sound insulation and noise reduction structure 1 described above. The second component 12 is provided with a contoured surface 21 on the side away from the first surface 112. The inner wall of the contoured surface 21 is configured to fit the outer surface of the cylinder head 311 of the engine 31.

[0098] Specifically, the sound insulation and noise reduction device 2 covers the outer surface of the cylinder head 311.

[0099] It can be understood that by making the shape and size of the part of the cavity of the mold for forming the contoured surface 21 of the formed second component 12 consistent with the shape and size of the outer surface of the cylinder head 311, the contoured surface 21 that can fit the outer surface of the cylinder head 311 can be formed.

[0100] In the embodiment, the sound insulation and noise reduction structure 1 provided by the above-mentioned embodiment can consume sound wave energy of different frequency bands through the first component 11 and the second component 12 respectively, thereby achieving a better sound insulation and noise reduction effect. On the other hand, the sound insulation and noise reduction structure 1 can eliminate the energy of the middle-high frequency sound wave and the low frequency sound wave through the first component 11 and the second component 12 respectively, thereby expanding the sound elimination frequency band of the sound insulation and noise reduction structure 1, and improving the coverage of the sound insulation and noise reduction structure 1 to the working noise of the engine 31. In this way, the sound wave transmitted by the engine 31 to the outside can be reduced, thereby improving the ride comfort of the automobile.

[0101] In addition, the side of the second component 12 away from the first surface 112 is profiled according to the structure of the cylinder head, so as to form a profiled surface 21, so that the second component 12 has a higher fit with the cylinder head 311. In this way, on the one hand, the sound insulation and noise reduction device 2 can protect the cylinder head 311, thereby improving the deformation degree of the cylinder head 311 after being impacted, and on the other hand, more noise generated by the engine 31 can be absorbed and isolated, thereby improving the sound insulation and noise reduction effect.

[0102] Please refer to Figure 6 and Figure 7 , Figure 7 is an exploded view of the sound insulation and noise reduction device 2 provided in the exemplary embodiments of the present disclosure. In some embodiments, the sound insulation and noise reduction device 2 further comprises a heat-conducting piece 22. The heat-conducting piece 22 is arranged on the side of the first component 11 away from the second component 12.

[0103] It can be understood that there is a high-temperature oil pipe beside the engine 31, and the heat of the high-temperature oil pipe will be transmitted to the sound insulation and noise reduction device 2, thereby having a thermal effect on the sound insulation and noise reduction device 2. Therefore, in the embodiment, by arranging the heat-conducting piece 22, the heat dissipation of the sound insulation and noise reduction device 2 can be improved, thereby reducing the thermal effect of the high-temperature oil pipe on the sound insulation and noise reduction device 2. In this way, the sound insulation and noise reduction effect of the sound insulation and noise reduction device 2 can be ensured.

[0104] Exemplarily, the heat-conducting piece 22 can be a metal sheet, for example, an aluminum sheet, a copper sheet, a steel sheet or an alloy sheet, etc.

[0105] In some embodiments, the heat-conducting piece 22 is an aluminum foil. It can be understood that the density of the aluminum foil is relatively small. Therefore, in the embodiment, the aluminum foil is selected as the heat-conducting piece 22, which can not only dissipate heat from the sound insulation and noise reduction device 2 through the heat-conducting piece 22, but also control the overall weight of the sound insulation and noise reduction device 2.

[0106] In some embodiments, the thickness d of the heat-conducting piece 22 is 0.5mm-10mm.

[0107] Exemplarily, the thickness of the aluminum foil includes but is not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 0.5mm, 1.5mm, 2.5mm, 3.5mm, 4.6mm, 5.8mm, 6mm, 6.5mm, 7.5mm, 8mm, 9.2mm, 10mm.

[0108] It can be understood that the thickness of the heat-conducting member 22 can be adjusted according to the use environment.

[0109] In the embodiment, through the above definition, on the one hand, the strength of the aluminum foil can be guaranteed so that it can adapt to the vibration of the engine 31 during operation; on the other hand, the thickness of the aluminum foil can be prevented from being too large to occupy more space, thereby facilitating the arrangement of the sound insulation and noise reduction device 2.

[0110] Specifically, the thickness of the aluminum foil is 0.5mm-1mm.

[0111] Please refer to Figure 8 , Figure 8 is a schematic view of the connection structure between the heat-conducting member 22 and the sound insulation and noise reduction structure 1 provided in the exemplary embodiment of the present disclosure. In some embodiments, the sound insulation and noise reduction device 2 further comprises a first connecting assembly. The first connecting assembly comprises a first screw 24. The end of the shank of the first screw 24 is screwed with the first component 11 after penetrating through the heat-conducting member 22. In this way, the heat-conducting member 22 and the first component 11 are detachably connected, so as to improve the assembly efficiency and maintainability.

[0112] Please refer to Figure 8 , in some embodiments, the first connecting assembly further comprises a nut 23. The nut 23 is connected with the first component 11. The end of the shank of the first screw 24 is screwed with the threaded hole 232 of the nut 23 after penetrating through the heat-conducting member 22.

[0113] It can be understood that when the first component 11 is an injection molded part, the nut 23 is a pre-embedded part. When the first component 11 is injection molded, the nut 23 is arranged in the cavity for molding the first component 11, and after solidification, the first component 11 is connected with the nut 23.

[0114] Specifically, the nut 23 is connected with the body 114.

[0115] In the embodiment, by arranging the nut 23, the head of the first screw 24 can be pressed on the nut 23, preventing the direct contact of the first screw 24 with the first component 11 from causing the first component 11 to crack, thereby improving the strength of the part where the first component 11 cooperates with the first screw 24, so that the tightening force of the first screw 24 can be set larger. In this way, the connection stability between the heat-conducting member 22 and the first component 11 can be improved, so as to avoid the resonance phenomenon of the heat-conducting member 22.

[0116] See also Figure 8 In some embodiments, the outer circumference of the nut 23 is provided with a first connecting groove 231. A portion of the first component 11 extends into the first connecting groove 231 and connects to the inner wall of the first connecting groove 231. This not only increases the area of ​​the connecting surface between the first component 11 and the nut 23, but also reduces the axial obstruction of the first component 11 on the nut 23, thereby improving the positional stability of the nut 23 relative to the first component 11 and effectively preventing the nut 23 from falling off.

[0117] In some embodiments, the first connecting groove 231 extends in an annular shape along the circumference of the threaded hole 232. This not only improves the axial symmetry of the nut 23 to improve the stress state, but also increases the area of ​​the connecting surface between the first component 11 and the nut 23.

[0118] See also Figure 7 In some embodiments, the sound insulation and noise reduction device 2 further includes a second screw 25. The end of the shank of the second screw 25 is configured to pass through the first component 11 and then be threadedly connected to the cylinder head 311. This allows the sound insulation and noise reduction device 2 to be detachably connected to the cylinder head 311, thereby improving assembly efficiency and maintainability.

[0119] See also Figure 7 and Figure 9 , Figure 9 Schematic diagram of the engagement of a compression bushing 26 with the first component 11, provided in an exemplary embodiment of the present disclosure. In some embodiments, the sound insulation and noise reduction device 2 further includes a compression bushing 26. The compression bushing 26 is embedded within the first component 11. The distal end of the shank of the second screw 25 is configured to pass through the inner hole of the compression bushing 26 and then be threadedly engaged with the cylinder head 311.

[0120] Exemplarily, the compression bushing 26 is a metal bushing, such as a brass bushing.

[0121] It is understood that when the first component 11 is an injection molded part, the compression bushing 26 is a pre-embedded part. When the first component 11 is injection molded, the compression bushing 26 is set in the mold cavity of the first component 11, and after it is cured, the first component 11 and the compression bushing 26 are connected.

[0122] In this embodiment, the provision of a compression bushing 26 allows the head of the second screw 25 to be pressed against the compression bushing 26, preventing direct contact between the second screw 25 and the first component 11, which could cause cracking of the first component 11. This improves the strength of the portion of the first component 11 that engages the second screw 25, allowing for a higher tightening force on the second screw 25. This enhances the connection stability between the sound insulation and noise reduction device 2 and the cylinder head 311.

[0123] See alsoFigure 9 In some embodiments, the compression-proof sleeve 26 comprises a barrel 261 and a support ring 262 arranged on the outer circumferential surface of the barrel 261. The support ring 262 is in contact with the cap portion of the second screw 25. In this way, the area of the contact surface between the second screw 25 and the compression-proof sleeve 26 can be increased, so as to improve the protection of the first component 11, thereby effectively avoiding the cracking of the first component 11 due to the large tightening force of the second screw 25.

[0124] Referring to Figure 9 In some embodiments, the outer circumferential surface of the compression-proof sleeve 26 is provided with a second connecting groove 263. The first component 11 extends into the first connecting groove 231 and is connected with the inner wall of the second connecting groove 263. In this way, not only the area of the connecting surface between the first component 11 and the compression-proof sleeve 26 can be increased, but also the resistance of the first component 11 to the axial movement of the compression-proof sleeve 26 can be improved, thereby improving the positional stability of the compression-proof sleeve 26 relative to the first component 11 and effectively avoiding the falling off of the compression-proof sleeve 26.

[0125] Specifically, the second connecting groove 263 is arranged on the outer circumferential surface of the barrel 261.

[0126] In some embodiments, the second connecting groove 263 extends in the circumferential direction of the threaded hole 232 in an annular shape. In this way, not only the axial symmetry of the compression-proof sleeve 26 is improved to improve the stress state, but also the area of the connecting surface between the first component 11 and the compression-proof sleeve 26 is increased to improve the protection of the first component 11 by the compression-proof sleeve 26.

[0127] Referring to Figure 10 , Figure 10 is a structural block diagram of a vehicle 3 provided in an exemplary embodiment of the present disclosure. The embodiments of the present application also provide a vehicle 3. The vehicle 3 comprises an engine 31 and the sound insulation and noise reduction device 2 described above. The engine 31 has a cylinder head 311. The profiled surface 21 is attached to the outer surface of the cylinder head 311. The first component 11 is connected with the engine 31.

[0128] In the present embodiment, by adopting the aforementioned sound insulation and noise reduction device 2, on the one hand, the sound wave energy of different frequency bands can be consumed by the first component 11 and the second component 12 respectively, so as to achieve a better sound insulation and noise reduction effect. On the other hand, the energy of the medium-high frequency sound wave and the low frequency sound wave can be consumed by the first component 11 and the second component 12 respectively, so as to broaden the sound insulation frequency band of the sound insulation and noise reduction structure 1, thereby improving the coverage of the sound insulation and noise reduction structure 1 to the working noise of the engine 31. In this way, the sound wave transmitted by the engine 31 to the outside can be reduced, so as to improve the ride comfort of the vehicle 3.

[0129] In the description of the application, the terms "first", "second", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0130] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0131] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0132] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment in accordance with the technical essence of the present application without departing from the technical solution content of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A sound insulation and noise reduction structure, characterized in that: include: A first component has a cavity, a first surface of the first component is provided with a first through hole, and the first through hole is connected to the cavity; The second component is a porous structure, one side of the second component is connected to the first surface, and the other side of the second component is configured to be connected to the noise source.

2. The sound insulation and noise reduction structure according to claim 1, characterized in that: The first component includes a body and a sound absorbing member connected to the body. The surface of the sound absorbing member facing away from the body is the first surface. The cavity is provided in the sound absorbing member.

3. The sound insulation and noise reduction structure according to claim 1, characterized in that: There are a plurality of cavities and a plurality of first through holes, and the plurality of first through holes are arranged in a one-to-one correspondence with the plurality of cavities.

4. The sound insulation and noise reduction structure according to claim 1, characterized in that: The temperature resistance value of the first component is not less than 100°C.

5. The sound insulation and noise reduction structure according to claim 4, characterized in that: The material of the first component is any one of the following materials: PA66, PA66+GF30, PP+GF30, and PP+TD20.

6. The sound insulation and noise reduction structure according to any one of claims 1 to 5, characterized in that: The temperature resistance of the second component is not less than 100°C.

7. The sound insulation and noise reduction structure according to claim 6, characterized in that: The material of the second component is any one of the following materials: polyurethane, polyvinyl alcohol, and melamine.

8. The sound insulation and noise reduction structure according to any one of claims 1 to 5, characterized in that: The second component is a foamed component.

9. The sound insulation and noise reduction structure according to any one of claims 1 to 5, characterized in that: The second component is detachably connected to the first component.

10. The sound insulation and noise reduction structure according to claim 9, characterized in that: The sound insulation and noise reduction structure also includes a limiting member and a connecting column. The limiting member is provided with a second through hole. One end of the connecting column is connected to the first component, and the other end passes through the second component and is interference fit with the second through hole. The limiting member is in blocking engagement with the second component.

11. The sound insulation and noise reduction structure according to claim 10, characterized in that: The limiting member is a sheet-like structure, and a plurality of through grooves are provided on the hole wall of the second through hole. The plurality of through grooves are arranged at intervals along the circumference of the second through hole, and the through grooves pass through the limiting member along the axial direction of the second through hole.

12. A sound insulation and noise reduction device, applied to an engine, characterized in that: The sound insulation and noise reduction structure comprises the sound insulation and noise reduction structure according to any one of claims 1 to 10, wherein a contoured surface is provided on a side of the second component facing away from the first surface, and the contoured surface is configured to fit with an outer surface of a cylinder head of the engine.

13. The sound insulation and noise reduction device according to claim 12, characterized in that: The sound insulation and noise reduction device further includes a heat conducting member, which is arranged on a side of the first component facing away from the second component.

14. The sound insulation and noise reduction device according to claim 13, characterized in that: The heat conducting member is aluminum foil.

15. The sound insulation and noise reduction device according to claim 14, characterized in that: The thickness of the heat conducting member is 0.5 mm to 10 mm.

16. The sound insulation and noise reduction device according to any one of claims 13 to 15, characterized in that: The sound insulation and noise reduction device also includes a first connecting component, which includes a first screw. The end of the rod of the first screw passes through the heat conductor and is threadedly connected to the first component.

17. The sound insulation and noise reduction device according to claim 16, characterized in that: The first connecting assembly further includes a nut connected to the first component, and the end of the rod of the first screw passes through the heat conducting member and is threadedly connected to the threaded hole of the nut.

18. The sound insulation and noise reduction device according to claim 17, characterized in that: A first connecting groove is provided on the outer peripheral surface of the nut, and a portion of the first component extends into the first connecting groove and is connected to the inner wall of the first connecting groove.

19. The sound insulation and noise reduction device according to claim 18, characterized in that: The first connecting groove extends in a ring shape along the circumference of the threaded hole.

20. The sound insulation and noise reduction device according to any one of claims 12 to 15, characterized in that: The sound insulation and noise reduction device further includes a second screw, wherein the end of the rod of the second screw is configured to pass through the first component and then be threadedly connected to the cylinder head.

21. The sound insulation and noise reduction device according to claim 20, characterized in that: The sound insulation and noise reduction device also includes a pressure-resistant bushing, which is embedded in the first component. The end of the rod of the second screw is configured to pass through the inner hole of the pressure-resistant bushing and then be threadedly connected to the cylinder head.

22. The sound insulation and noise reduction device according to claim 21, characterized in that: The compression bushing includes a cylinder and a support ring arranged on the outer circumferential surface of the cylinder, and the support ring is in contact with the cap portion of the second screw.

23. The sound insulation and noise reduction device according to claim 21, characterized in that: A second connecting groove is provided on the outer peripheral surface of the compression-resistant bushing, and a portion of the first component extends into the second connecting groove and is connected to the inner wall of the second connecting groove.

24. A vehicle, characterized in that: include: an engine having a cylinder head; And, in the sound insulation and noise reduction device according to any one of claims 12 to 23, the contoured surface is in contact with the outer surface of the cylinder head, and the first component is connected to the engine.

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