Acoustic black hole component, sound-absorbing panel assembly, electric drive unit, inverter device, and vehicle

Abstract

The present disclosure relates to an acoustic black hole component (100, 200), comprising a tapered portion (110, 210), wherein the tapered portion (110, 210) comprises an expanded end (111, 211) and a constricted end (112, 212) provided opposite to each other, and the tapered portion (110, 210) is configured to taper from the expanded end (111, 211) to the constricted end (112, 212); and wherein the tapered portion (110, 210) is configured as a curved surface structure. An electric drive unit comprising the acoustic black hole component described above is also disclosed. A sound-absorbing panel assembly comprising the acoustic black hole component described above is also disclosed. An inverter device comprising the sound-absorbing panel assembly described above is also disclosed. A vehicle comprising the electric drive unit described above or the inverter device described above is also disclosed.

Description

[0001] ACOUSTIC BLACK HOLE COMPONENT, SOUND-ABSORBING PANEL ASSEMBLY, ELECTRIC DRIVE UNIT, INVERTER DEVICE, AND VEHICLE

[0002] Technical Field

[0003] The present disclosure relates to the use of acoustic black hole principles for vibration reduction and noise reduction, and more specifically to an acoustic black hole component, a sound-absorbing panel assembly comprising such an acoustic black hole component, an inverter device comprising such a sound-absorbing panel assembly, an electric drive unit comprising a housing in which such an acoustic black hole component is provided, and a vehicle.

[0004] Background

[0005] In the power-train of existing vehicles, especially electric or hybrid vehicles, vibration reduction and noise reduction are crucial for improving the overall performance of the vehicles. In the prior art, vibration reduction and noise reduction are usually implemented in several methods: (1) Increasing the stiffness of the related structure (e.g., cover plate) of a related device (e.g., electric drive unit, more specifically, inverter device or transmission device), for example, by setting reinforcing ribs on the related structure, the reinforcing ribs having, for example, a honeycomb structure or topological analysis structure, so that the modal frequency of the related structure increases to be higher than an excitation frequency, thereby making the related structure less susceptible to vibration and noise excitation. This method increases the material cost of the related structure and also increases its weight. (2) Setting damping material on the related structure, for example, by setting the related structure as double layers of panels and placing damping material between the double layers of panels. This method has poor stability.

[0006] The acoustic black hole effect is a phenomenon where the wave velocity of a bending wave gradually decreases to zero when propagating in a wedge-shaped structure, thus resulting in no reflection. Since the bending wave is not reflected inan ideal black hole structure, this means that energy is concentrated at the tip portion of the wedge-shaped structure. This phenomenon makes black hole structures extremely promising for applications in the fields such as vibration reduction, noise reduction, and energy recovery.

[0007] The present disclosure is intended to use the acoustic black hole principle to solve problems existing in the prior art.

[0008] Summary of the Invention

[0009] To this end, one aspect of the present disclosure provides an acoustic black hole component that can effectively reduce vibration and noise. According to an embodiment, the acoustic black hole component is provided to comprise a tapered portion, wherein the tapered portion comprises an expanded end and a constricted end which are provided opposite to each other, the tapered portion is configured to taper from the expanded end to the constricted end, and the tapered portion of the acoustic black hole component is configured as a curved surface structure.

[0010] According to different embodiments, the acoustic black hole component proposed in the present disclosure may further comprise one or more of the following further developments.

[0011] According to some optional embodiments, the generatrix of the tapered portion satisfies the following formula:

[0012] / i(x) = £xm,m > 2

[0013] where £ is a constant, x is a length of a projection of the generatrix in a first direction, and h is a length of a projection of the generatrix in a second direction perpendicular to the first direction. The acoustic black hole component configured in this way can ensure its low cut-off frequency, thereby achieving vibration reduction and noise reduction effects over a wider range of bandwidths. More specifically, it can attenuate energy waves with frequencies higher than the cut-off frequency.

[0014] According to some embodiments, the acoustic black hole component is coated with a damping material on at least an outer surface of the tapered portion. The coated damping material can attenuate the vibrational energy accumulated at thecontracted end of the acoustic black hole, thereby achieving vibration reduction and noise reduction effects.

[0015] According to some embodiments, the material of the tapered portion comprises metal.

[0016] According to some embodiments, the metal comprises at least one of the following: stainless steel, nickel, nickel-plated steel, copper-plated steel, brass, and phosphor bronze.

[0017] According to some embodiments, the acoustic black hole component further comprises a mounting portion provided at the expanded end of the tapered portion for mounting the acoustic black hole component. Thus, it allows the acoustic black hole component to be mounted onto other related structures in a simple manner.

[0018] According to some embodiments, the mounting portion is provided as a flange structure relative to the expanded end of the tapered portion to facilitate installation.

[0019] According to another aspect of the present disclosure, there is proposed an electric drive unit, which may comprise:

[0020] a housing;

[0021] a drive device provided in the housing; and

[0022] at least one acoustic black hole component according to any one of the above embodiments, which is provided in the housing. Thus, the electric drive unit proposed in the present disclosure achieves vibration reduction and noise reduction of the housing by arranging the acoustic black hole component in the housing.

[0023] According to some embodiments of the electric drive unit proposed in the present disclosure, the acoustic black hole component is a solid component independent of the housing.

[0024] According to some embodiments of the electric drive unit proposed in the present disclosure, the first direction is an extending direction of a central axis of the tapered portion.

[0025] According to some embodiments of the electric drive unit proposed in the present disclosure, the tapered portion is a generally conical structure. The acoustic black hole component configured in this way exhibits optimized vibration reduction and noise reduction effects.According another embodiment of the invention, the acoustic black hole component includes a mounting portion configured to be fixed to the housing, in particular by screwing, press-fitting, and / or welding.

[0026] The mounting portion allows the acoustic black hole component to be easily assembled with the housing. The tapered portion extends from the mounting portion in the first direction.

[0027] According to another embodiment of the invention, the acoustic black hole component is made of the same material as the housing. In this embodiment, the mounting portion may not be necessary, the tapered portion then extending directly from the housing. If a mounting portion is present, it forms a connecting portion between the housing and the tapered portion.

[0028] According to another embodiment of the invention, the first direction in which the tapered portion extends is the same direction as that of an axis of rotation of a drive shaft of the drive device.

[0029] According to some embodiments of the electric drive unit proposed in the present disclosure, the drive device comprises an intermediate drive shaft, and the acoustic black hole component is arranged such that the tapered portion extends at least partially into a hollow portion of the intermediate drive shaft. Vibration and noise are relatively high at the intermediate drive shaft, and this arrangement of the acoustic black hole component allows for more effective vibration and noise reduction. Furthermore, setting the tapered portion to at least partially extend into the hollow portion of the intermediate drive shaft eliminates the need to occupy additional space within the housing, thereby facilitating a more compact overall configuration.

[0030] According to some embodiments of the electric drive unit proposed in the present disclosure, the housing is provided with at least one bearing seat for mounting the intermediate drive shaft, and the acoustic black hole component is mounted to the housing inside of at least one of the bearing seats.

[0031] According to some embodiments of the electric drive unit proposed in the present disclosure, the housing comprises an end cover, and the bearing housing is provided on the end cover.Another aspect of the present disclosure provides a sound-absorbing panel assembly that may comprise:

[0032] a sound-absorbing panel comprising a first side and a second side opposite to each other, and at least one acoustic black hole component as described above; and a damping component;

[0033] wherein the acoustic black hole component is configured such that the tapered portion thereof extends from the first side through the sound-absorbing panel to the second side, with the expanded end provided on the first side and the constricted end provided on the second side, and the damping component is provided on the second side of the sound-absorbing panel corresponding to the acoustic black hole component. Thus, the damping component can further ensure sound wave absorption, achieving the purpose of vibration reduction and noise reduction.

[0034] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the first direction is perpendicular to the extending direction of the central axis of the tapered portion.

[0035] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the acoustic black hole component is integrally provided in the sound-absorbing panel to form an acoustic black hole passing through the sound-absorbing panel.

[0036] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, a peripheral surface of the acoustic black hole generally forms a bowl-shaped profile. The acoustic black hole component configured in this way exhibits optimized vibration reduction and noise reduction effects.

[0037] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the damping component is provided to close an opening at the constricted end of the acoustic black hole component at the second side of the sound-absorbing panel. Thus, the damping component is provided at the constricted end where the vibration energy of the acoustic black hole component accumulates, and can attenuate the vibration energy, thereby achieving vibrationreduction and noise reduction effects.

[0038] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the sound-absorbing panel assembly further comprises a covering plate provided on the second side of the sound-absorbing panel, and the damping component is provided between the sound-absorbing panel and the covering plate. This can ensure that the damping component is securely held in place.

[0039] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the damping component for each acoustic black hole component is a separate member, and the covering plate is provided with an accommodating groove for at least partially accommodating the corresponding damping component. This allows the damping component to be securely held in place without increasing the thickness of the sound-absorbing panel assembly.

[0040] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the sound-absorbing panel assembly further comprises an adhesive member provided between the sound-absorbing panel and the covering plate. This can ensure that the sound-absorbing panel is securely mounted in place relative to the covering plate.

[0041] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the adhesive member comprises a viscoelastic damping material. This allows for further enhancement of the vibration reduction and noise reduction effects of the sound-absorbing panel assembly.

[0042] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, the sound-absorbing panel comprises a plurality of acoustic black hole components, the plurality of acoustic black hole components being arranged in rows, circles, or triangles.

[0043] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, acoustic black hole components in different rows are staggered with each other.

[0044] According to some embodiments of the sound-absorbing panel assembly proposed in the present disclosure, a total thickness of the sound-absorbing panelassembly is in a range of 3 mm to 5 mm.

[0045] Another aspect of the present disclosure provides an inverter device comprising the sound-absorbing panel assembly as described above.

[0046] According to some embodiments of the inverter device proposed in the present disclosure, the sound-absorbing panel assembly forms at least a portion of a cover plate of the inverter device, wherein the covering plate is an outer side plate of the cover plate.

[0047] Another aspect of the present disclosure provides a vehicle comprising the electric drive unit as described above and / or the inverter device as described above.

[0048] Brief description of the Drawings

[0049] In order to explain the technical solution of embodiments of the present disclosure more clearly, the drawings that need to be used in the embodiments will be briefly described below. It should be understood that the drawings below show only some embodiments of the present disclosure, so they should not be regarded as limiting the scope. Those of ordinary skill in the art could obtain other related drawings based on these drawings without inventive effort. In the drawings:

[0050] Fig. 1 is a perspective view of an acoustic black hole component according to an exemplary embodiment;

[0051] Fig. 2 is a schematic diagram of variations of a bending wave in an acoustic black hole component according to an exemplary embodiment;

[0052] Fig. 3 is a perspective view of an electric drive unit according to an exemplary embodiment;

[0053] Fig. 4 is a cross-sectional view of an electric drive unit according to an exemplary embodiment;

[0054] Fig. 5 is an exploded perspective view of a sound-absorbing panel assembly according to an exemplary embodiment;

[0055] Fig. 6 is a partial perspective view of a sound-absorbing panel of a soundabsorbing panel assembly according to an exemplary embodiment;

[0056] Fig. 7 is a local force diagram view of a covering plate of a sound-absorbing panel assembly according to an exemplary embodiment;Fig. 8 is a cross-sectional view of a sound-absorbing panel assembly according to an exemplary embodiment; and

[0057] Fig. 9 is a schematic diagram of variations of a bending wave in an acoustic black hole component of a sound-absorbing panel assembly according to an exemplary embodiment.

[0058] List of reference numerals

[0059] 10 Sound-absorbing panel assembly

[0060] 20 Electric drive unit

[0061] 100, 200 Acoustic black hole component

[0062] 110, 210 Tapered portion

[0063] 111, 211 Expanded end

[0064] 112, 212 Constricted end

[0065] 220 Mounting portion

[0066] 300 Housing

[0067] 310 End cover

[0068] 400 Sound-absorbing panel

[0069] 410 First side

[0070] 420 Second side

[0071] 430 Rib

[0072] 500 Damping component

[0073] 600 Covering plate

[0074] 610 Accommodating groove

[0075] 700 Adhesive member

[0076] 800 Intermediate drive shaft

[0077] CL1 Central axis of tapered portion 110

[0078] CL2 Central axis of tapered portion 210

[0079] LI, L2 Generatrix of tapered portion

[0080] x Length of projection of generatrix in first direction

[0081] h Length of projection of generatrix in second directionDetailed Description of the Embodiments

[0082] An acoustic black hole component, a sound-absorbing panel assembly, an electric drive unit, an inverter device, and a vehicle according to embodiments of the present disclosure will be described in detail below with reference to the drawings. In order to make the objectives, technical solutions and advantages of the present practical disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure; obviously, the embodiments described are some, not all, of the embodiments of the present disclosure.

[0083] Thus, the detailed description below of embodiments of the present disclosure provided in conjunction with the drawings is not intended to limit the claimed scope of the present disclosure, and merely shows selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the present disclosure without inventive effort are included in the scope of protection of the present disclosure.

[0084] Unless otherwise defined in the context, the singular includes the plural. Throughout this specification, the terms "comprising", "having", etc. are used herein to specify the existence of the mentioned characteristic, number, step, operation, element, component or combination thereof, without ruling out the existence or addition of one or more other characteristics, numbers, steps, operations, elements, components or combinations thereof.

[0085] In addition, although terms including ordinal numbers such as "first", "second", etc. may be used to describe various components, these components are not limited by these terms, which are merely used to differentiate one element from another. For example, without departing from the scope of the present disclosure, a first component may be referred to as a second component and, similarly, a second component may be referred to as a first component.

[0086] In the description of the present invention, it must be understood that orientational or positional relationships indicated by the terms "upper", "lower", "left," "right," "inner," "outer," etc. are based on the orientational or positionalrelationships shown in the drawings, or are the orientational or positional relationships in which the disclosed product is usually placed when used, or are the orientational or positional relationships commonly understood by those skilled in the art, and are merely intended to facilitate and simplify description of the present disclosure, rather than indicating or implying that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

[0087] As shown in Figs. 1 to 2 and 8 to 9, one aspect of the present disclosure proposes an acoustic black hole component 100 or 200, which can effectively reduce vibration and noise. According to a first embodiment, as shown in the figures, the acoustic black hole component 100 or 200 is provided to comprise a tapered portion 110 or 210. The tapered portion 110 or 210 is configured to comprise an expanded end 111 or 211 and a constricted end 112 or 212 provided opposite to each other. The tapered portion 100 or 200 is configured to taper from its expanded end 111 or 211 to its constricted end 112 or 212. More specifically, the tapered portion 110 or 210 of the acoustic black hole component 100 or 200 is configured as a curved surface structure.

[0088] According to one embodiment, as shown in Figs. 1 to 2, the generatrix LI or L2 of the tapered portion 110 or 210 of the acoustic black hole component 100 or 200 satisfies the following formula:

[0089] / i(x) = £xm,m > 2

[0090] where £ is a constant, x is the length of the projection of the corresponding generatrix LI or L2 in a first direction, and h is the length of the projection of the generatrix LI or L2 in a second direction perpendicular to the first direction. The acoustic black hole component 100 or 200 configured in this way can ensure its low cut-off frequency, thereby achieving vibration reduction and noise reduction effects over a wider range of bandwidths. More specifically, it can attenuate energy waves with frequencies higher than the cut-off frequency.

[0091] According to one embodiment, as shown in Figs. 1 to 2, the first direction of the generatrix L2 of the tapered portion 210 of the acoustic black hole component 200 is the extending direction of the central axis CL2 of the tapered portion 210.According to some embodiments, as shown in the figures, the tapered portion 210 of the acoustic black hole component 200 is a generally conical structure. The acoustic black hole component 200 configured in this way has optimized vibration reduction and noise reduction effects.

[0092] According to another embodiment, as shown in Fig. 9, the first direction of the generatrix LI of the tapered portion 110 of the acoustic black hole component 100 is perpendicular to the extending direction of the central axis CL1 of the tapered portion 110.

[0093] As shown in Figs. 2 and 9, energy waves, such as vibrational and / or acoustic energy waves, may be attenuated in the tapered portion 110 or 210 of the acoustic black hole component 100 or 200 proposed in the present disclosure, and more specifically, attenuated from the expanded end 111 or 211 to the constricted end 112 or 212. That is, the acoustic black hole component 100 or 200 proposed in the present disclosure can effectively absorb vibrations and reduce noise.

[0094] According to some embodiments, the material of the tapered portion 210 of the acoustic black hole component 200 as shown particularly in Figs. 1 to 2 comprises metal. According to exemplary embodiments, the metal comprises at least one of the following: stainless steel, nickel, nickel-plated steel, copper-plated steel, brass, and phosphor bronze. Illustratively, the acoustic black hole component may be a solid component.

[0095] According to some embodiments, the acoustic black hole component 200 as shown particularly in Figs. 1 to 2 may further be coated with a damping material on at least the outer surface of the tapered portion 210. The coated damping material can attenuate the vibrational energy accumulated at the constricted end 212 of the acoustic black hole component, thereby achieving vibration reduction and noise reduction effects.

[0096] According to some embodiments, the acoustic black hole component 200 as shown particularly in Figs. 1 to 2 may further comprise a mounting portion 220 provided at the expanded end 211 of the tapered portion 210. The mounting portion 220 is provided to mount the acoustic black hole component 200. More specifically, it is provided to mount the acoustic black hole component 200 into a device inwhich such acoustic black hole component 200 is to be used, for example an electric drive unit such as a transmission device or an inverter device of a vehicle. According to some embodiments, the mounting portion 220 may be provided as a flange structure relative to the expanded end 211 of the tapered portion 210. Thus, it allows the acoustic black hole component 200 to be mounted onto other related structures in a simple manner. More specifically, a mounting hole may be provided on a related structure such as a housing of the device in which such an acoustic black hole component 200 is to be used. Illustratively, the mounting portion 220 may be designed to be mounted into the mounting hole by means of form fit or interference fit.

[0097] According to another aspect of the present disclosure, as shown in Figs. 3 to 4, the present disclosure proposes an electric drive unit 20, which may comprise a housing 300 and a drive device provided in the housing 300. Furthermore, the electric drive unit 20 may also comprise at least one acoustic black hole component 100 or 200 as described above, which is provided in or on the housing 300. Thus, the electric drive unit 20 proposed in the present disclosure achieves vibration reduction and noise reduction of the housing 100 by providing the acoustic black hole component 100 or 200 in the housing 300. This avoids the limitations in the prior art, such as making the housing material heavier and thus being detrimental to its lightweight requirements, increasing its manufacturing cost, or causing instability.

[0098] As schematically shown in Fig. 4, in some embodiments, the acoustic black hole component 200 may be a component independent of the housing 300. More specifically, it may be a component that needs to be mounted onto the housing 300. This allows for convenient replacement of the acoustic black hole component 200.

[0099] As schematically shown in Fig. 4, in some embodiments, the drive device comprises an intermediate drive shaft 800, and the acoustic black hole component 200 is arranged such that its tapered portion 210 extends at least partially into a hollow portion of the intermediate drive shaft 800. Vibration and noise are relatively high at the intermediate drive shaft 800, and such an arrangement of the acoustic black hole component 200 allows for more effective vibration and noisereduction. Furthermore, setting the tapered portion 210 to at least partially extend into the hollow portion of the intermediate drive shaft 800 eliminates the need to occupy additional space within the housing, thereby facilitating a more compact overall configuration.

[0100] In some embodiments of the electric drive unit 20 proposed according to the present disclosure, the housing 300 may be provided with at least one bearing seat for mounting the intermediate drive shaft 800. The acoustic black hole component 200 may be mounted to the housing 300 inside of at least one bearing seat. More specifically, it may be mounted to the housing 300 at each bearing seat. According to an exemplary embodiment, the bearing seat of the housing 300 is provided with a mounting hole. The mounting hole is provided to receive a mounting portion of the acoustic black hole component 200. More specifically, it receives the mounting portion 220 of the acoustic black hole component 200 by means of form fit or interference fit, thereby enabling the acoustic black hole component 200 to be mounted to the housing 300 in a simple manner. In some embodiments of the electric drive unit 20 proposed according to the present disclosure, the housing 300 may comprise an end cover 310, and the bearing seat may be provided on the end cover 310.

[0101] Alternatively or additionally, the acoustic black hole component 200 may be provided at another position in or on the housing 300 as needed.

[0102] According to some embodiments, the electric drive unit 20 described above is a transmission device or comprises a transmission device. The transmission device comprises the housing 300, the drive device and the acoustic black hole component 200 described above.

[0103] As shown in Figs. 5 to 8, another aspect of the present disclosure proposes a sound-absorbing panel assembly 10, which may comprise the acoustic black hole component 100 or 200 as described in any one of the above embodiments.

[0104] According to some embodiments, as shown in Figs. 5 to 8, the soundabsorbing panel assembly 10 may comprise a sound-absorbing panel 400 and a damping component 500. The sound-absorbing panel 400 may comprise a first side 410 and a second side 420 opposite to each other, and the acoustic black holecomponent 100 described above. More specifically, the acoustic black hole component 100 is configured such that its tapered portion 110 extends from the first side 410 of the sound-absorbing panel through the sound-absorbing panel 400 to the second side 420, with the expanded end 111 provided at the first side 410 and the constricted end 112 provided at the second side 420. The damping component 500 is provided at the second side 420 of the sound-absorbing panel 400 corresponding to the acoustic black hole component 100. Thus, the damping component 500 can further ensure the absorption of sound waves, achieving the purpose of vibration reduction and noise reduction. According to an exemplary embodiment, the material of the sound-absorbing panel 400 is metal.

[0105] According to some embodiments of the sound-absorbing panel assembly 10 proposed in the present disclosure, as shown in Figs. 5 to 6 and 8, acoustic black hole components 100, and more specifically, a plurality of acoustic black hole components 100, are integrally provided in the sound-absorbing panel 400 to form an acoustic black hole passing through the sound-absorbing panel 400. This allows for the omission of the installation of acoustic black hole components 100, thereby simplifying the assembly process of the sound-absorbing panel assembly 10. According to some embodiments, as shown in Figs. 5 to 6 and 8, the peripheral surface of the acoustic black hole generally forms a bowl-shaped profile. The acoustic black hole component 100 configured in this way has optimized vibration reduction and noise reduction effects.

[0106] According to some embodiments of the sound-absorbing panel assembly 10 proposed in the present disclosure, as shown in Fig. 8, the damping component 500 is provided to close an opening of the constricted end 112 of the acoustic black hole component 100 at the second side 420 of the sound-absorbing panel 400. More specifically, the damping component 500 is provided to cover the constricted end 112. Thus, the damping component 500 is provided at the constricted end 112 where the vibration energy of the acoustic black hole component 100 accumulates, and can attenuate the vibration energy, thereby achieving vibration reduction and noise reduction effects.

[0107] According to some embodiments, as shown in Fig. 5, the sound-absorbingpanel 400 may comprise a plurality of acoustic black hole components 100. The plurality of acoustic black hole components 100 are arranged in rows, circles, or triangles. According to some embodiments, acoustic black hole components 100 in different rows may be staggered with each other. According to some embodiments, as shown in Fig. 5, the sound- absorbing panel 400 may further be provided with reinforcing ribs 430, more specifically, a plurality of integrally formed reinforcing ribs 430, for enhancing the stiffness and modal frequencies of the sound-absorbing panel 400. According to some embodiments, the reinforcing ribs 430 divide the sound-absorbing panel 400 into different regions, and at least one acoustic black hole component 100 is provided in each region.

[0108] According to some embodiments of the sound-absorbing panel assembly 10 proposed in the present disclosure, as shown in Figs. 5 and 7 to 8, the soundabsorbing panel assembly further comprises a covering plate 600. The covering plate 600 is provided at the second side 420 of the sound-absorbing panel 400, and a damping component 500 is provided between the sound-absorbing panel 400 and the covering plate 600. This can ensure that the damping component 500 is securely held in place.

[0109] According to some embodiments of the sound-absorbing panel assembly 10 proposed in the present disclosure, as shown in Figs. 5 and 8, the damping component 500 for each acoustic black hole component 100 is a separate member, and the covering plate 600 is provided with an accommodating groove 610 for at least partially accommodating the corresponding damping component 500. This allows the damping component 500 to be securely held in place without increasing the thickness and weight of the sound-absorbing panel assembly 10. According to some embodiments, the total thickness of the sound-absorbing panel assembly 10 is in the range of 3 mm to 5 mm.

[0110] Alternatively, an integral damping component may be provided between the sound-absorbing panel 400 and the covering plate 600, the integral damping component being provided to cover two or more acoustic black hole components 100.

[0111] According to some embodiments of the sound-absorbing panel assembly 10proposed in the present disclosure, as shown in Figs. 5 and 8, the sound-absorbing panel assembly 10 may further comprise an adhesive member 700 provided between the sound-absorbing panel 400 and the covering plate 600. This can ensure that the sound-absorbing panel 400 is securely mounted in place relative to the covering plate 600. According to some embodiments, the adhesive member 700 may comprise a viscoelastic damping material. This allows for further enhancement of the vibration reduction and noise reduction effects of the soundabsorbing panel assembly 10.

[0112] Another aspect of the present disclosure proposes an inverter device that may comprise the sound-absorbing panel assembly 10 as described above. According to some embodiments, the sound-absorbing panel assembly 10 forms at least a portion of a cover plate of the inverter device, wherein the covering plate 600 is an outer side plate of the cover plate. This allows for vibration reduction and noise reduction of the inverter device.

[0113] Another aspect of the present disclosure proposes a vehicle comprising the electric drive unit 20 as described above and / or the inverter device as described above. It should be noted that herein, the vehicle may be an electrified vehicle, for example, a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plugin hybrid electric vehicle (PHEV), a range extended EV (REEV), or a fuel cell electric vehicle (FCEV). The vehicle may also be a hydrogen vehicle.

[0114] While the acoustic black hole component, the sound-absorbing panel assembly, the electric drive unit, the inverter device, and the vehicle proposed in the present invention have been described in detail above with reference to preferred embodiments, those skilled in the art can understand that various modifications and changes could be made to the specific embodiments above without departing from the concept of the present invention, and various technical features and structures proposed in the present invention could be combined in various ways without exceeding the scope of protection of the present invention.

[0115] The scope of the present disclosure is not defined by the embodiments described above, but by the appended claims and their equivalent scope.

Claims

Claims1. An acoustic black hole component (100, 200), comprisinga tapered portion (110, 210), the tapered portion (110, 210) comprising an expanded end (111, 211) and a constricted end (112, 212) provided opposite to each other, the tapered portion (110, 210) being configured to taper from the expanded end (111, 211) to the constricted end (112, 212),wherein the tapered portion (110, 210) is configured as a curved surface structure.

2. The acoustic black hole component (100, 200) as claimed in claim 1, wherein the generatrix (LI, L2) of the tapered portion (110, 210) satisfies the following formula: / i(x) = £xm,m > 2where £ is a constant, x is a length of a projection of the generatrix (LI, L2) in a first direction, and h is a length of a projection of the generatrix (LI, L2) in a second direction perpendicular to the first direction.

3. The acoustic black hole component (200) as claimed in claim 1 or 2, whereinthe acoustic black hole component (200) is coated with a damping material on at least an outer surface of the tapered portion (210).

4. The acoustic black hole component (200) as claimed in any one of claims 1 to 3, whereinthe tapered portion (210) comprises metal.

5. The acoustic black hole component (200) as claimed in claim 4, wherein the metal comprises at least one of the following: stainless steel, nickel, nickel-plated steel, copper-plated steel, brass, and phosphor bronze.

6. The acoustic black hole component (200) as claimed in any one of claims 1 to 5, whereinthe acoustic black hole component (200) further comprises a mounting portion (220) provided at the expanded end (211) of the tapered portion (210) for mounting the acoustic black hole component.

7. The acoustic black hole component (200) as claimed in claim 6, whereinthe mounting portion (220) is provided as a flange structure relative to the expanded end (211) of the tapered portion (210).

8. An electric drive unit (20), comprising:a housing (300);a drive device provided in the housing (300); andat least one acoustic black hole component (200) as claimed in any one of the preceding claims, which is provided in the housing (300).

9. The electric drive unit (20) as claimed in claim 8, wherein the acoustic black hole component (200) is a solid component independent of the housing (300); and wherein the first direction is an extending direction of a central axis (CL2) of the tapered portion (210).

10. The electric drive unit (20) as claimed in claim 9, wherein the tapered portion (210) is a conical structure.

11. The electric drive unit (20) as claimed in any one of claims 8 to 10, whereinthe drive device comprises an intermediate drive shaft (800), and the acoustic black hole component (200) is arranged such that the tapered portion (210) extends at least partially into a hollow portion of the intermediate drive shaft (800).

12. The electric drive unit (20) as claimed in claim 11, whereinthe housing (300) is provided with at least one bearing seat for mounting the intermediate drive shaft (800), and the acoustic black hole component (200) is mounted to the housing (300) inside of at least one of the bearing seats.

13. The electric drive unit (20) as claimed in claim 12, whereinthe housing (300) comprises an end cover (310), and the bearing seat is provided on the end cover (310).

14. A sound-absorbing panel assembly (10), comprising:a sound-absorbing panel (400) comprising a first side (410) and a second side (420) opposite to each other, and at least one acoustic black hole component (100) as claimed in claim 1 ; anda damping component (500);wherein the acoustic black hole component (100) is configured such that thetapered portion (110) thereof extends from the first side (410) through the soundabsorbing panel (400) to the second side (420), with the expanded end (111) provided at the first side (410), and the constricted end (112) provided at the second side (420), and the damping component (500) is provided at the second side (420) of the sound-absorbing panel (400) corresponding to the acoustic black hole component (100).

15. The sound-absorbing panel assembly (10) as claimed in claim 14, wherein the first direction is perpendicular to an extending direction of a central axis (CL1) of the tapered portion (110).

16. The sound-absorbing panel assembly (10) as claimed in claim 15, wherein the acoustic black hole component (100) is integrally provided in the soundabsorbing panel (400) to form an acoustic black hole passing through the soundabsorbing panel (400).

17. The sound-absorbing panel assembly (10) as claimed in claim 16, wherein a peripheral surface of the acoustic black hole forms a bowl-shaped profile.

18. The sound-absorbing panel assembly (10) as claimed in claim 16, wherein the damping component (500) is provided to close an opening of the constricted end (112) of the acoustic black hole component (100) at the second side (420) of the sound-absorbing panel (400).

19. The sound-absorbing panel assembly (10) as claimed in any one of claims 14 to 18, further comprising a covering plate (600), wherein the covering plate (600) is provided on the second side (420) of the sound-absorbing panel (400), and the damping component (500) is provided between the sound-absorbing panel (400) and the covering plate (600).

20. The sound-absorbing panel assembly (10) as claimed in claim 19, wherein the damping component (500) for each acoustic black hole component (100) is a separate member, andthe covering plate (600) is provided with an accommodating groove (610) for at least partially accommodating the corresponding damping component (500).

21. The sound-absorbing panel assembly (10) as claimed in claim 20, further comprising an adhesive member (700) provided between the sound-absorbingpanel (400) and the covering plate (600).

22. The sound-absorbing panel assembly (10) as claimed in claim 21, wherein the adhesive member (700) comprises a viscoelastic damping material.

23. The sound-absorbing panel assembly (10) as claimed in any one of claims 14 to 18, wherein the sound-absorbing panel comprises a plurality of acoustic black hole components (100), and the plurality of acoustic black hole components (100) are arranged in rows, circles or triangles.

24. The sound-absorbing panel assembly (10) as claimed in claim 23, wherein the acoustic black hole components (100) in different rows are staggered with each other.

25. The sound-absorbing panel assembly (10) as claimed in any one of claims 14 to 18, wherein a total thickness of the sound-absorbing panel assembly (10) is in a range of 3 mm to 5 mm.

26. An inverter device, comprising the sound-absorbing panel assembly (10) as claimed in any one of claims 14 to 25.

27. The inverter device as claimed in claim 26, wherein the sound-absorbing panel assembly (10) forms at least a portion of a cover plate of the inverter device, wherein the covering plate (600) is an outer side plate of the cover plate.

28. A vehicle, comprising the electric drive unit (20) as claimed in any one of claims 8 to 13 and / or the inverter device as claimed in any one of claims 26 to 27.

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