CN112960040A - Hollow sound insulation automobile wheel cover structure with acoustic black hole inner cavity - Google Patents
Hollow sound insulation automobile wheel cover structure with acoustic black hole inner cavity Download PDFInfo
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- CN112960040A CN112960040A CN202110310489.2A CN202110310489A CN112960040A CN 112960040 A CN112960040 A CN 112960040A CN 202110310489 A CN202110310489 A CN 202110310489A CN 112960040 A CN112960040 A CN 112960040A
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- 238000009413 insulation Methods 0.000 title abstract description 21
- 239000011358 absorbing material Substances 0.000 claims abstract description 20
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- 230000030279 gene silencing Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/16—Mud-guards or wings; Wheel cover panels
- B62D25/161—Mud-guards made of non-conventional material, e.g. rubber, plastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/16—Mud-guards or wings; Wheel cover panels
- B62D25/18—Parts or details thereof, e.g. mudguard flaps
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Abstract
The invention discloses a hollow sound insulation automobile wheel cover structure with an acoustic black hole inner cavity, which comprises: the cover comprises a cover body, wherein an acoustic black hole inner cavity is formed in the cover body and comprises a first cavity and a second cavity, one end of the second cavity is communicated with one end of the first cavity, the distance between two cavity walls, opposite to each other, of the first cavity is h, and the distance between two cavity walls, opposite to each other, of one end of the second cavity is kh0(ii) a A sound absorbing material filled in the second chamber, wherein, in a direction away from the second chamber, h satisfies: h (x) kh0+kεxmM is greater than or equal to 2, k is equal to 1 or 2, and ε is a constant. Automobile wheel according to embodiment of the inventionThe cover structure has a good sound insulation effect, and the automobile wheel cover structure is light in weight, so that the light weight of a vehicle is facilitated, and the production cost is low.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a hollow sound insulation automobile wheel cover structure with an acoustic black hole inner cavity.
Background
In the related art, the sound absorption performance of the wheel cover is improved by increasing the thickness of the wheel cover, changing the material of the wheel cover, or attaching a sound absorbing material over the wheel cover. However, increasing the thickness of the wheel cover tends to increase the mass of the wheel cover, which is not in line with the trend of light weight and increases the manufacturing cost; changing the material of the wheel cover requires investing a large amount of research and development funds to carry out experiments, and the result is difficult to expect; the required sound-absorbing material of the sound-absorbing material of laminating is more above the wheel casing, has increased quality, the cost of wheel casing, and sound-absorbing material easily takes place to interfere with other parts of vehicle, easily takes place to drop at the in-process of traveling.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a hollow sound insulation automobile wheel cover structure with an acoustic black hole inner cavity, the automobile wheel cover structure has a good sound insulation effect, the weight of the automobile wheel cover structure is light, the light weight of a vehicle is favorably realized, and the production cost is low.
A hollow sound-insulating vehicle wheel house structure having an acoustic black hole cavity according to an embodiment of the present invention, the vehicle wheel house structure comprising: the cover comprises a cover body, wherein an acoustic black hole inner cavity is formed in the cover body and comprises a first cavity and a second cavity, one end of the second cavity is communicated with one end of the first cavity, the distance between two cavity walls, opposite to each other, of the first cavity is h, and the distance between two cavity walls, opposite to each other, of one end of the second cavity is kh0(ii) a A sound absorbing material filled in the second chamber, wherein, in a direction away from the second chamber, h satisfies: h (x) kh0+kεxmM is greater than or equal to 2, k is equal to 1 or 2, and ε is a constant.
Hollow sound insulation automobile wheel cover knot with acoustic black hole inner cavity according to embodiment of the inventionThe acoustic black hole inner cavity comprises a first cavity and a second cavity, and the distance h between two cavity walls of the first cavity, which are opposite to each other, satisfies the following conditions: h (x) kh0+kεxmThe sound absorption material can be filled in the second cavity, so that sound waves are gathered in the acoustic black hole inner cavity and are finally absorbed and dissipated by a small amount of sound absorption material, and therefore high-efficiency sound insulation is achieved, production cost is reduced, weight of an automobile wheel cover structure is reduced, and light weight of a vehicle is facilitated to be achieved.
In addition, the wheel cover structure of the automobile according to the above embodiment of the present invention may further have the following additional technical features:
according to the automobile wheel cover structure of some embodiments of the present invention, the acoustic black hole inner cavity is an axisymmetric structure.
According to some embodiments of the invention, the acoustic black hole inner cavity comprises two first chambers and two second chambers, and the other ends of the two first chambers are communicated.
According to some embodiments of the invention, the second chamber has a spacing of two chamber walls opposite to each other in a radial direction of the cap body equal everywhere and equal to kh0。
According to some embodiments of the invention, the acoustic black hole inner cavity further comprises a third cavity communicating with the other end of the first cavity, wherein the third cavity is equally spaced from the two cavity walls that are opposite to each other in the radial direction of the mask body.
According to some embodiments of the invention, the acoustic black hole inner cavity is a plurality of acoustic black hole inner cavities, wherein at least two acoustic black hole inner cavities are staggered along the circumferential direction of the cover body; and/or at least two acoustic black hole inner cavities are staggered along the axial direction of the cover body.
According to some embodiments of the invention, a plurality of the acoustic black hole lumen arrays are distributed.
According to some embodiments of the invention, the first chamber has a distance x from one end to the other end1K, h of at least two of the acoustic black hole cavities0、x1At least one parameter of epsilon and m is different in value.
According to some embodiments of the invention, the cover body comprises an inner cover and an outer cover, an inner surface of the inner cover being connected to an outer surface of the outer cover, wherein one of the inner cover and the outer cover is provided with a groove, and the other covers a notch of the groove to define the acoustic black hole inner cavity.
According to some embodiments of the invention, the cover body comprises an inner cover and an outer cover, wherein the inner surface of the inner cover is connected with the outer surface of the outer cover, the inner cover is provided with a first groove, the outer cover is provided with a second groove, and the first groove and the second groove are arranged oppositely to form the acoustic black hole inner cavity.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a wheel house structure of a vehicle according to a first embodiment of the present invention;
FIG. 2 is a partial cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a partial sectional view of a wheel house structure of a vehicle according to a second embodiment of the present invention, taken along the direction indicated by line A-A in FIG. 1;
FIG. 4 is a partial sectional view of a wheel house structure of a vehicle according to a third embodiment of the present invention, taken along the direction indicated by line A-A in FIG. 1;
FIG. 5 is a partial sectional view of a wheel house structure of a vehicle according to a fourth embodiment of the present invention, taken along the direction indicated by line A-A in FIG. 1;
FIG. 6 is a partial sectional view of a wheel house structure of a vehicle according to a fifth embodiment of the present invention, taken along the direction indicated by the line A-A in FIG. 1;
FIG. 7 is a schematic structural view of an inner cover according to some embodiments of the invention;
FIG. 8 is a schematic structural view of an outer cover according to some embodiments of the invention.
Reference numerals:
an automotive wheel cover structure 100;
a cover body 10; an acoustic black hole inner cavity 11; a first chamber 12; a second chamber 13; a third chamber 14; an inner layer cover 101; an outer layer cover 102;
a sound absorbing material 20;
a first groove 31; a second recess 32.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and "a plurality" means two or more, and the first feature may be "on" or "under" the second feature, and may include the first and second features being in direct contact, or may include the first and second features being not in direct contact but being in contact with another feature therebetween, and the first feature being "on", "above" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is higher in level than the second feature.
Controlling noise in a vehicle is an important content for improving the riding comfort of the vehicle. With the development of vehicle vibration noise control technology, the sequence of contribution degrees of various noise sources in the vehicle also changes. Engine optimization and the application and development of exhaust silencing technology have resulted in significant reductions in powertrain noise, and tire-road noise is increasingly becoming one of the major sources of noise during vehicle, especially electric, vehicle operation. In addition, during the running of the vehicle, the air flow in the space formed by the tire rotating at a high speed and the wheel cover of the vehicle is complicated to form the air flow noise, and the wheel cover of the vehicle is the first "barrier" for blocking the transmission of the tire-road noise and the air flow noise to the inside of the vehicle.
In order to improve the sound absorption performance of the wheel cover and suppress the transmission of noise to the inside of the vehicle, in the related art, a method of increasing the thickness of the wheel cover, changing the material of the wheel cover, or attaching a layer of sound absorption material or damping material on the wheel cover is generally adopted to reduce tire-road noise, air flow noise, gravel and rainwater knocking noise in the driving process of the vehicle, so that the noise environment in the vehicle is optimized. However, increasing the thickness of the wheel cover tends to increase the mass of the wheel cover, does not meet the trend of light weight of the vehicle, and increases the manufacturing cost. Changing the material of the wheel cover requires a great deal of research and development capital to be invested for experiments, and the result is difficult to be expected. The sound absorption material is attached to the upper portion of the wheel cover, the sound absorption efficiency or the energy consumption efficiency of the sound absorption material is low, the thickness and the position of the attached sound absorption material cannot be guaranteed to be the optimal scheme, the required sound absorption material is more, the quality of the wheel cover assembly is increased, the wheel cover assembly is contrary to the vehicle light weight idea, and the cost is increased. Meanwhile, the attached sound absorption material is easy to interfere with other parts of the vehicle and is easy to fall off in the driving process.
Therefore, the invention provides a hollow sound insulation automobile wheel cover structure 100 with an acoustic black hole inner cavity 11, which can realize efficient noise control, realize the light weight of the automobile wheel cover structure 100 by removing partial materials and reducing the using amount of sound absorption materials, and have the advantages of good noise control effect and low manufacturing and maintenance cost.
A hollow soundproof automobile wheel house structure 100 having an acoustic black hole inner cavity 11 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 1 to 6, a wheel cover structure 100 for a vehicle according to an embodiment of the present invention may include: a cover body 10 and a sound absorbing material 20.
Specifically, an acoustic black hole inner cavity 11 is formed in the cover body 10, the acoustic black hole inner cavity 11 introduces a black hole concept in astronomy physics into the acoustic vibration field, and after sound waves enter the acoustic black hole inner cavity 11, convergence of noise such as tire-road noise and air flow noise is achieved through the acoustic black hole effect, and finally the noise is absorbed and dissipated by a small amount of sound absorption materials 20, so that efficient sound insulation is achieved.
In order to more clearly show the specific structure of the acoustic black hole cavity 11, the acoustic black hole cavity 11 shown in fig. 2-6 is an expanded view of the section of the acoustic black hole cavity 11 along the line a-a in fig. 1 (i.e., a section perpendicular to the axis of the acoustic black hole cavity 11 and passing through the center of the acoustic black hole cavity 11) in different embodiments.
As shown in fig. 3-6, the acoustic black hole inner cavity 11 may include a first cavity 12 and a second cavity 13, and one end (e.g., the right end shown in fig. 3) of the second cavity 13 communicates with one end (e.g., the left end shown in fig. 3) of the first cavity 12. In the radial direction (e.g., the inward-outward direction shown in fig. 3) of the cover body 10, the first chamber 12 has two chamber walls opposed to each other at a distance h, and the second chamber 13 has two chamber walls opposed to each other at one end at a distance kh0。
As shown in fig. 2-6, in a direction away from the associated second chamber 13, the first chamber 12 may have h satisfying: h (x) kh0+kεxmWherein h (x) represents the distance between the two chamber walls of the first chamber 12 at a distance x from the second chamber 13, e.g. as shown in FIG. 3, the distance between one end and the other end of the first chamber 12 is x1I.e. the other end of the first chamber 12 is spaced from the second chamber 13 by x1The distance between the two cavity walls at the other end of the corresponding first cavity 12 is h (x)1) Is marked as h1. m is greater than or equal to 2, k is equal to 1 or 2, epsilon is a constant, mK and epsilon can be flexibly set according to the noise reduction requirement, so that the acoustic black hole inner cavity 11 can meet the convergence of sound waves with different frequencies.
Thereby, the cavity thickness of the first cavity 12 gradually decreases in a certain power exponent form towards the direction close to the second cavity 13, and one end of the two cavity walls of the first cavity 12 opposite to each other is close to each other and the other end is far away from each other, so that the first cavity 12 is generally formed in a trumpet shape and has a large head end and a small head end, so that the phase velocity and the group velocity of the sound wave propagating in the first cavity 12 are also reduced, thereby realizing the convergence of the sound wave.
In addition, as shown in fig. 2, the sound-absorbing material 20 may be filled in the second chamber 13, that is, disposed near the small end of the first chamber 12, in other words, the sound-absorbing material 20 is attached to the high energy density region of the sound wave, so that the sound wave can be absorbed, the purpose of vibration and noise reduction can be achieved, the noise caused by the impact of gravel, rain, mud and the like during the driving process of the vehicle can be reduced, the propagation of the noise to the inside of the vehicle can be suppressed, and the noise environment inside the vehicle can be optimized. Moreover, the energy is gathered through the first chamber 12, less sound absorption material 20 can be used in the second chamber 13, the first chamber 12 is of a cavity structure, the using amount of the sound absorption material 20 is reduced, and the weight and the production and manufacturing cost are reduced. Moreover, the sound-absorbing material 20 is located in the second chamber 13, so that the flatness and the attractiveness of the automobile wheel cover structure 100 can be ensured, interference of other parts of a vehicle caused by the fact that the sound-absorbing material is attached to the upper side of the wheel cover in the related art is avoided, and the sound-absorbing material 20 is ensured not to fall off easily.
In addition, the acoustic black hole inner cavity 11 is formed in the automobile wheel cover structure 100, so that the weight of the automobile wheel cover structure 100 is reduced, the light weight of a vehicle is favorably realized, the performance of a wheel assembly is not damaged, and the vibration reduction and noise reduction effects of the automobile wheel cover structure 100 are favorably realized.
In some embodiments, k is equal to 1, and as shown in fig. 3 and 4, one of two cavity walls of the first cavity 12 opposite to each other may be a flat surface and the other is a cambered surface in the radial direction of the mask body 10. For example, in FIG. 3 the inner chamber wall of the first chamber 12 is planar and the end points of the inner chamber wall are at zero, the outer chamber wall is in a direction away from the second chamber 13 and in powersThe index h (x) ═ h0+εxmAnd (4) extending.
In other embodiments, k is equal to 2, and as shown in fig. 5 and 6, in the radial direction of the mask body 10, both cavity walls of the first cavity 12 opposite to each other are cambered surfaces, and taking a midpoint of one end of each cavity wall close to the second cavity 13 as a zero point, both cavity walls are along a direction away from the second cavity 13 and along the power exponent h (x) ═ h0+εxmExtend away from each other so that the distance between the two cavity walls is h (x) 2h0+2εxm. In the embodiment where k is equal to 2, the acoustic black hole inner cavity 11 may make the sound wave converge better, so as to improve the noise reduction effect.
It should be noted that, in the embodiment of the present invention, the arrangement direction of the first chamber 12 and the second chamber 13 can be flexibly set according to actual situations. For example, in some embodiments, as shown in fig. 2, the first chamber 12 and the second chamber 13 may be arranged along a circumferential direction (e.g., a left-right direction shown in fig. 2) of the shroud body 10, or the first chamber 12 and the second chamber 13 may be arranged along an axial direction (e.g., a front-back direction shown in fig. 7) of the shroud body 10, or the first chamber 12 and the second chamber 13 may be arranged inclined at any angle (e.g., 15 °, 30 °, 60 °, etc.) with respect to an axis of the shroud body 10, and the like, and the arrangement may be flexible according to specific practical situations so as to meet the convergence of frequencies of different sound waves.
In some embodiments, the sound absorbing material 20 may comprise a foam, a porous material, or the like, and is lightweight and has good sound insulating and absorbing properties.
For convenience of description, the orientations of the present invention such as "inward-outward direction", "left-right direction", "front-back direction", etc. are based on the orientation relationship shown in the drawings, and are not limited to the orientation in the practical application.
In an embodiment of the present invention, the acoustic black hole inner cavity 11 may include a plurality of first chambers 12 and a plurality of second chambers 13, the plurality of first chambers 12 and the plurality of second chambers 13 are correspondingly communicated one to one, and the plurality of first chambers 12 and the plurality of second chambers 13 together form a complete chamber, so as to improve a noise reduction effect of the acoustic black hole inner cavity 11.
For example, in some embodiments, as shown in fig. 2, the acoustic black hole cavity 11 may include two first chambers 12 and two second chambers 13, wherein the other ends of the two first chambers 12 are communicated (i.e. the big ends of the two first chambers 12 are communicated with each other), and the two second chambers 13 are respectively located at the sides of the two first chambers 12 far away from each other. For example, as shown in fig. 2, two first chambers 12 are arranged in the left-right direction, the right end of one second chamber 13 (for example, the left portion of the acoustic black hole chamber 11) is communicated with the left end of the first chamber 12 on the left side, the left end of the other second chamber 13 (for example, the right portion of the acoustic black hole chamber 11) is communicated with the right end of the first chamber 12 on the right side, and the right end of the first chamber 12 on the left side is communicated with the left end of the first chamber 12 on the right side, so as to form the communicated acoustic black hole chamber 11. The sound wave that produces when the vehicle traveles can get into acoustics black hole inner chamber 11 in, propagates in two first cavities 12 to assemble respectively in two second cavities 13, sound absorbing material 20 in the second cavity 13 can absorb, dissipate the sound wave that assembles, in order to play better sound insulation purpose, the sound wave is better in the effect of assembling of two first cavities 12, has ensured better noise reduction effect.
According to the automobile wheel cover structure 100 of the embodiment of the invention, the acoustic black hole inner cavity 11 comprises the first cavity 12 and the second cavity 13, and the distance h between two cavity walls of the first cavity 12 opposite to each other satisfies the following conditions: h (x) kh0+kεxmThe sound-absorbing material 20 can be filled in the second chamber 13, so that sound waves are gathered in the acoustic black hole inner cavity 11 and are finally absorbed and dissipated by a small amount of sound-absorbing material 20, and therefore high-efficiency sound insulation is achieved, production cost is reduced, weight of the automobile wheel cover structure 100 is reduced, and light weight of a vehicle is facilitated to be achieved.
In some embodiments, the acoustic black hole inner cavity 11 may have an axisymmetric structure, which is beneficial to increase the broadband effects of sound insulation and sound absorption, so that the noise reduction effect is better, the structure is simple, and the processing and manufacturing of the cover body 10 are facilitated.
For example, as shown in fig. 2, the acoustic black hole cavity 11 may be symmetrical with respect to an axial cross section (e.g., a cross section shown by line C-C in fig. 2) of the enclosure body 10, for example, the acoustic black hole cavity 11 includes two first chambers 12 and two second chambers 13 symmetrically disposed. For another example, as shown in fig. 5 and 6, the acoustic black hole inner cavity 11 may be symmetrical with respect to the circumferential surface (e.g., the cross section shown by the line B-B in fig. 2) of the cover body 10, for example, two cavity walls of the first cavity 12 opposite to each other are symmetrically disposed, and two cavity walls of the second cavity 13 are also symmetrically disposed.
In some embodiments, as shown in fig. 2, the acoustic black hole inner cavity 11 may be formed in a central symmetric structure, so that the acoustic black hole inner cavity 11 can further increase the broadband effect of sound insulation and absorption, and the noise reduction effect is better.
In some embodiments of the present invention, two cavity wall structures of the second cavity 13 opposite to each other in the radial direction of the shield body 10 can be flexibly arranged according to practical situations.
In some embodiments, the spacing between the walls of the second chamber 13 increases in a direction approaching the first chamber 12. For example, the distance between the two walls of the second chamber 13 is y, and in the direction close to the first chamber 12, y satisfies: y (x) kh2+kε0xnWherein y (x) represents the distance between the two cavity walls of the second cavity 13 at x from the end of the second cavity 13 away from the first cavity 12, and kh2N is greater than or equal to 2, k is equal to 1 or 2, epsilon0Is a constant.
In other embodiments, as shown in FIG. 2, the spacing between two cavity walls of the second chamber 13 opposite to each other in the radial direction of the shield body 10 is equal everywhere, and the spacing between two cavity walls of the second chamber 13 opposite to each other in the radial direction of the shield body 10 may be kh0That is, the distance between the two cavity walls of the second cavity 13 is equal to the distance between the two cavity walls of the first cavity 12 and the end close to the second cavity 13, so that the cover body 10 can be conveniently processed and manufactured, the forming and demolding are facilitated, and the convergence effect of the acoustic black hole inner cavity 11 can be enhanced.
According to some embodiments of the present invention, as shown in fig. 2, the acoustic black hole inner cavity 11 further includes a third cavity 14, the third cavity 14 is communicated with the other end of the first cavity 12 (i.e. the end far away from the second cavity 13), so that the third cavity 14 is communicated with the first cavity 12, thereby avoiding a situation of stress concentration at the other end of the first cavity 12, ensuring good structural strength of the enclosure body 10, and the distance between two cavity walls of the third cavity 14 opposite to each other along the radial direction of the enclosure body 10 is equal everywhere, which is beneficial to manufacturing, and can enhance the convergence effect of the acoustic black hole inner cavity 11, so that the sound insulation effect is better.
In an embodiment where the acoustic black hole cavity 11 includes two first chambers 12 and two second chambers 13, as shown in fig. 2, the two first chambers 12 may communicate with the same third chamber 14, or the acoustic black hole cavity 11 may include two third chambers 14, the two first chambers 12 may respectively communicate with the two third chambers 14, and the two third chambers 14 communicate with each other. Stress concentration at the joint of the two first chambers 12 and poor structural rigidity at the joint can be avoided, and the cover body 10 is ensured to have better structural strength.
The low-frequency component proportion of the tire-road noise is large, and the mode of attaching the sound-absorbing material above the wheel cover in the related art has poor sound-absorbing and sound-insulating capabilities for low-frequency band noise and insufficient noise control capability. In some embodiments of the present invention, as shown in fig. 1, the number of the acoustic black hole cavities 11 may be multiple (two or more). Wherein, two at least acoustics black hole inner chambers 11 stagger along the circumference of cover body 10 to make a plurality of acoustics black hole inner chambers 11 can cover wider range on cover body 10 circumference, can strengthen the sound absorption and the sound insulation effect to the low frequency band noise, realize the demand of making an uproar. Or, at least two acoustic black hole inner cavities 11 can be staggered along the axial direction of the cover body 10 to cover a wider range in the axial direction of the cover body 10, so that the sound absorption and sound insulation effects under low frequency can be enhanced, and further, a plurality of acoustic black hole inner cavities 11 can be staggered along the circumferential direction and the axial direction of the cover body 10 to further improve the noise reduction effect.
According to some embodiments of the invention, as shown in fig. 7 and 8, the plurality of acoustic black hole inner cavities 11 can be distributed in an array manner, so that the plurality of acoustic black hole inner cavities 11 can have a good absorption effect on various low-frequency noises generated by a vehicle in driving, and the problem of low-frequency noise absorption efficiency in the related art is effectively solved. For example, the plurality of acoustic black hole inner cavities 11 may form an axial array, a rectangular array, a delta-shaped array, or the like, or the plurality of acoustic black hole inner cavities 11 may have the above-mentioned various arrays, which can realize the convergence and dissipation of omnidirectional energy, and have a better noise reduction effect.
In some embodiments of the present invention, as shown in FIGS. 2-6, the first chamber 12 is spaced from one end to the other end by a distance x1The width (e.g., the dimension in the front-back direction shown in fig. 7) of the acoustic black hole cavity 11 is b, and k, h of at least two acoustic black hole cavities 11 of the plurality of acoustic black hole cavities 110、x1At least one parameter value among epsilon, b and m is different, and through the difference of parameter value, can obtain the acoustics black hole inner chamber 11 of different structures, obtain heterogeneous acoustics black hole inner chamber 11 structure to absorb the sound wave of different frequencies, realize the sound insulation of broad frequency band, ensure better noise reduction effect, carry out high-efficient suppression to the noise that tire-road surface and air flow produced.
For different automobile wheel cover structures 100, the number, arrangement mode, parameter values and the like of the acoustic black hole inner cavities 11 can be different, so that actual noise reduction requirements of different automobile types and the like can be met. In some embodiments, the structural sizes of the second chamber 13 or the third chamber 14 of different acoustic black hole inner cavities 11 may be different, and flexible arrangement is performed according to the frequency band range of noise or the actual situation of the automobile wheel cover structure 100, so as to meet different requirements of different automobile types.
In some embodiments, according to different noise frequency band ranges, a plurality of different acoustic black hole inner cavities 11 can be distributed in an array manner to obtain a heterogeneous acoustic black hole inner cavity 11 array, so that generated noise can be effectively suppressed when a vehicle runs, and a better sound insulation effect is achieved.
In some embodiments, as shown in fig. 1, 2, 7 and 8, the cover body 10 may include an inner cover 101 and an outer cover 102, an inner surface of the inner cover 101 is connected to an outer surface of the outer cover 102, the inner cover 101 is provided with a groove, and the outer cover 102 covers a notch of the groove to form the acoustic black hole inner cavity 11, so that the structural strength of the acoustic black hole inner cavity 11 is improved, and the cover body 10 is a separate piece which is convenient to form and facilitates installation of the sound absorbing material 20. After entering the acoustic black hole inner cavity 11, the sound waves are converged by using the acoustic black hole effect, and are finally absorbed and dissipated by the sound absorption material 20, so that efficient sound insulation is realized. In addition, the inner layer cover 101 is provided with the groove, so that partial materials of the original structure can be removed, the weight of the automobile wheel cover structure 100 is reduced, and the light weight of the automobile is favorably realized.
Of course, it is within the scope of the present invention that a groove be provided in the outer cover 102, specifically, the outer cover 102 is provided with a groove, and the inner cover 101 covers the notch of the groove to define the acoustic black hole cavity 11.
In some embodiments, as shown in fig. 2 to 8, the inner layer cover 101 may be provided with a first groove 31, the outer layer cover 102 may be provided with a second groove 32, and the first groove 31 and the second groove 32 are disposed opposite to each other, so that the first groove 31 and the second groove 32 form the acoustic black hole inner cavity 11, so that the acoustic black hole inner cavity 11 may be larger, and the sound waves are more conveniently converged, thereby achieving a better noise reduction effect.
In some embodiments, as shown in fig. 7 and 8, the thickness (i.e. the distance between the inner surface and the outer surface) of the inner cover 101 is H1, the thickness of the outer cover 102 is H2, and H1 and H2 can be flexibly set according to actual situations, so as to meet the requirements of different automobile wheel cover structures 100.
In some embodiments, the inner cover 101 and the outer cover 102 may be plastic plates, which have good compression resistance and bending resistance, are not easy to deform, have simple processing technology and light weight, and are beneficial to realizing light weight of vehicles and reducing production cost.
In some embodiments, the inner layer cover 101 and the outer layer cover 102 can be formed by injection molding, and are stable in size, easy to realize automation, high in production efficiency, good in product consistency and suitable for mass production.
In some embodiments, the inner cover 101 and the outer cover 102 can be connected by riveting, buckling, bonding and the like, so that the inner cover 101 and the outer cover 102 are good in connection effect, the notches of the grooves can be covered to form the acoustic black hole inner cavity 11, the connection structure is simple, and the connection is stable.
Other constructions and operations of the wheel house structure 100 of the automobile according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the terms "embodiment," "particular embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A hollow, sound-insulating automotive wheel cover structure having an acoustic black hole interior, said automotive wheel cover structure comprising:
the cover comprises a cover body, wherein an acoustic black hole inner cavity is formed in the cover body and comprises a first cavity and a second cavity, one end of the second cavity is communicated with one end of the first cavity, and the first cavity is arranged in the radial direction of the cover bodyThe distance between two cavity walls opposite to each other of one cavity is h, and the distance between two cavity walls opposite to each other at one end of the second cavity is kh0；
A sound absorbing material filled in the second chamber, wherein,
in a direction away from the second chamber, h satisfies: h (x) kh0+kεxm，
m is greater than or equal to 2, k is equal to 1 or 2, and epsilon is a constant.
2. The hollow acoustical automotive wheel cover structure having an acoustical black hole interior according to claim 1, wherein said acoustical black hole interior is an axisymmetric structure.
3. The hollow acoustical black hole vehicular wheel house structure of claim 1, wherein said acoustical black hole interior cavity comprises two of said first chambers and two of said second chambers, and the other ends of said two first chambers communicate.
4. The hollow sound-proof automobile wheel cover structure with acoustic black hole inner cavity according to claim 1, wherein the distance between two cavity walls of the second cavity opposite to each other in the radial direction of the cover body is equal at all places and is kh0。
5. The hollow sound-proof automobile wheel house structure having an acoustic black hole inner cavity according to claim 1, wherein the acoustic black hole inner cavity further comprises a third chamber communicating with the other end of the first chamber, wherein the third chamber has an equal distance between two cavity walls opposed to each other in the radial direction of the house body.
6. The hollow acoustical automotive wheel house structure with an acoustical black hole interior according to claim 1, wherein the acoustical black hole interior is plural, wherein,
at least two acoustic black hole inner cavities are staggered along the circumferential direction of the cover body; and/or the presence of a gas in the gas,
at least two acoustic black hole inner cavities are staggered along the axial direction of the cover body.
7. The hollow acoustical automotive wheel cover structure having an acoustical black hole interior according to claim 6, wherein a plurality of said acoustical black hole interior are distributed in an array.
8. The hollow acoustical automotive wheel cover structure with an acoustic black hole interior according to claim 6, wherein the first chamber has a distance x from one end to the other end1K, h of at least two of the acoustic black hole cavities0、x1At least one parameter of epsilon and m is different in value.
9. The hollow sound-proof automobile wheel house structure with an acoustic black hole inner cavity according to any one of claims 1 to 8, wherein the house body comprises an inner house and an outer house, an inner surface of the inner house being connected to an outer surface of the outer house, wherein,
one of the inner layer cover and the outer layer cover is provided with a groove, and the other cover seals a notch of the groove to define the acoustic black hole inner cavity.
10. The hollow sound-proof automobile wheel house structure with an acoustic black hole inner cavity according to any one of claims 1 to 8, wherein the house body comprises an inner house and an outer house, an inner surface of the inner house being connected to an outer surface of the outer house, wherein,
the inner layer cover is provided with a first groove, the outer layer cover is provided with a second groove, and the first groove and the second groove are oppositely arranged to form the acoustic black hole inner cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110310489.2A CN112960040A (en) | 2021-03-23 | 2021-03-23 | Hollow sound insulation automobile wheel cover structure with acoustic black hole inner cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110310489.2A CN112960040A (en) | 2021-03-23 | 2021-03-23 | Hollow sound insulation automobile wheel cover structure with acoustic black hole inner cavity |
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| CN112960040A true CN112960040A (en) | 2021-06-15 |
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| EP4270378A1 (en) * | 2022-04-27 | 2023-11-01 | BAE SYSTEMS plc | Improved acoustic black hole, structural damper, structurally damped structure, and method |
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