Noise reduction device for vehicle and vehicle

Abstract

The utility model provides a noise reduction device used for a vehicle and the vehicle, the noise reduction device is installed on a vehicle body metal plate of the vehicle, a pressure relief opening is formed in the vehicle body metal plate, and the noise reduction device comprises a cover body and a noise reduction device, the cover body covers the pressure relief opening, and a communication opening is formed in the cover body; the opening degree adjusting assembly is installed on the cover body, the opening degree adjusting assembly comprises blades and a driving mechanism, the blades are rotatably installed on the cover body around the first axis and located at the communicating opening, and the driving mechanism is connected with the blades and used for driving the blades to rotate relative to the cover body so as to adjust the opening degree of the communicating opening. Therefore, the opening degree of the communicating opening can be adjusted through the opening degree adjusting assembly, the communicating area of the communicating hole and the pressure relief opening can be reduced according to the noise reduction requirement, noise is blocked on a noise transmission path, the noise transmitted to one side of a passenger compartment is reduced, and the noise reduction effect is improved. The actual communication area of the hydraulic port and the passenger compartment is adjusted through the noise reduction device, the communication area is prevented from being too large, and the NVH performance of the pressure relief port is improved to the maximum extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a noise reduction device for a vehicle and the vehicle. BACKGROUND

[0002] At present, the rear lower part of the vehicle is usually provided with a pressure relief valve, and only an exhaust curtain is arranged at the area corresponding to the pressure relief valve without sound insulation and sound absorption measures. The opening area at the pressure relief valve is fixed, thereby causing the wind noise and tire noise generated during the driving of the vehicle to be transmitted to the side of the passenger compartment through the opening, which destroys the quietness of the rear row area in the passenger compartment and affects the NVH performance of the rear row space of the vehicle.

[0003] In the related art, the opening size at the pressure relief valve is usually designed based on the air conditioning inlet and exhaust function requirements in the vehicle and the internal pressure difference balance related factors of the vehicle, that is, the opening area at the pressure relief valve is usually designed according to the maximum function requirement size and cannot be arbitrarily reduced, thereby causing redundancy of the opening area and the problem of noise leakage at the opening. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application aims to provide a noise reduction device for a vehicle to improve the noise reduction performance of the vehicle.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A noise reduction device for a vehicle, which is installed on a vehicle body panel of the vehicle, wherein the vehicle body panel is formed with a pressure relief opening, and the noise reduction device comprises: a cover body, which is arranged at the pressure relief opening and is formed with a communication opening; and an opening degree adjusting assembly, which is installed on the cover body and comprises a blade and a driving mechanism, wherein the blade is rotatably installed on the cover body at the communication opening, and the driving mechanism is connected with the blade and is used to drive the blade to rotate relative to the cover body to adjust the opening degree at the communication opening.

[0007] According to some embodiments of the present application, the blade comprises a blade body and a rotating shaft, wherein the blade body is fixedly connected with the rotating shaft, and the rotating shaft is rotatably installed on the cover body and is connected with the driving mechanism.

[0008] According to some embodiments of the present application, the blade further comprises a noise reduction layer, which is arranged on the blade body in a fit manner.

[0009] According to some embodiments of the present application, the driving mechanism comprises: a driving motor, which is used to output a driving force; and a transmission assembly, which is power-connected between the driving motor and the rotating shaft.

[0010] According to some embodiments of the present application, the transmission assembly comprises a transmission belt sleeved and connected on the rotating shaft and the output end of the driving motor; and a tensioning wheel for adjusting the tightness of the transmission belt, and the tensioning wheel is adjustable relative to the position of the cover body.

[0011] According to some embodiments of the present application, the noise reduction device comprises a plurality of sets of the opening adjusting assembly, and the plurality of sets of the opening adjusting assembly are arranged in sequence along a first direction, and the first direction is perpendicular to the first axis.

[0012] According to some embodiments of the present application, a closed structure is formed between any two adjacent sets of the opening adjusting assembly.

[0013] According to some embodiments of the present application, the inner circumferential wall of the cover body defining the communication port is provided with a noise reduction cavity, the noise reduction cavity is recessed from the inner circumferential wall to a side away from the communication port, and the noise reduction cavity is in communication with the communication port.

[0014] According to some embodiments of the present application, the cover body comprises a cover body defining the communication port and configured as a hollow structure, and the noise reduction cavity is formed on the cover body; and resonance particles filled in the hollow structure.

[0015] Compared with the prior art, the noise reduction device for a vehicle has the following advantages:

[0016] (1) The opening of the communication port is adjusted by the opening adjusting assembly, the communication area at the communication hole and the pressure relief port can be reduced according to the noise reduction requirement, the noise is blocked on the transmission path of the noise, the noise transmitted to the passenger compartment side is reduced, the actual communication area of the hydraulic port and the passenger compartment is adjusted by the noise reduction device, the communication area is avoided to be too large, and the NVH performance at the pressure relief port is maximized.

[0017] (2) The noise reduction device of the present application is provided with a plurality of noise reduction structures (such as resonance particles, noise reduction cavities, etc.), so as to improve the weakening effect of the cover body itself on the noise energy, and further cooperate with the noise reduction layer formed on the blade to sufficiently weaken the noise.

[0018] Another object of the present application is to provide a vehicle.

[0019] In order to achieve the above object, the technical scheme of the present application is as follows:

[0020] A vehicle, the vehicle comprising the above-mentioned noise reduction device.

[0021] The vehicle and the above-mentioned noise reduction device have the same advantages as the prior art, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and are incorporated herein in

[0023] Figure 1 Structure diagram of a noise reduction device according to an embodiment of the present application Figure 1 ;

[0024] Figure 2 Structure diagram of a noise reduction device according to an embodiment of the present application Figure 2 ;

[0025] Figure 3 Cooperation diagram of a cover and a blade according to an embodiment of the present application Figure 1 ;

[0026] Figure 4 Cooperation diagram of a cover and a blade according to an embodiment of the present application Figure 2 ;

[0027] Figure 5 Partial diagram of a noise reduction device according to an embodiment of the present application

[0028] Figure 6 Partial sectional view of a noise reduction device according to an embodiment of the present application

[0029] Figure 7 Structure diagram of a blade according to an embodiment of the present application

[0030] Figure 8 Structure diagram of a vehicle according to an embodiment of the present application

[0031] Figure 9 Correspondence table of working conditions and ventilation areas according to an embodiment of the present application

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] Vehicle 1000; vehicle body panel 200; pressure relief port 210

[0034] Noise reduction device 100

[0035] Cover 1; communication port 101; noise reduction cavity 102; chute 103; cover body 11; resonance particles 12; mounting seat 13

[0036] Opening adjusting assembly 2; blade 21; blade body 211; rotating shaft 212; noise reduction layer 213; driving mechanism 22; driving motor 221; output end 2211; transmission assembly 222; transmission belt 2221; tensioning wheel 2222. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0038] The noise reduction device 100 for the vehicle 1000 according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. The noise reduction device 100 is mounted on the body panel 200 of the vehicle 1000, and the body panel 200 is formed with a pressure relief port 210, which can be used for discharging air inside the passenger compartment to maintain the internal air pressure balance of the passenger compartment.

[0039] The noise reduction device 100 according to the embodiments of the present application comprises a cover body 1 and an opening adjusting assembly 2.

[0040] The cover body 1 covers the pressure relief port 210, and the cover body 1 is formed with a communication port 101 communicating with the pressure relief port 210. The opening adjusting assembly 2 is mounted on the cover body 1, and the opening adjusting assembly 2 comprises a blade 21 and a driving mechanism 22. The blade 21 is rotatably mounted on the cover body 1 about a first axis, and the blade 21 is arranged at the communication port 101. The driving mechanism 22 is connected to the blade 21, and the blade 21 can be driven to rotate relative to the cover body 1 by the driving mechanism 22, so as to adjust the arrangement angle of the blade 21 relative to the cover body 1 at the communication port 101, and realize the adjustment of the opening degree at the communication port 101.

[0041] It should be noted that the "opening degree at the communication port 101" refers to the communication area of the communication port 101 with the pressure relief port 210. By adjusting the rotation angle of the blade 21 at the cover body 1, the blade 21 can shield the communication port 101, thereby realizing the adjustment of the opening degree at the communication port 101.

[0042] When the blade 21 is arranged parallel to the opening direction of the communication port 101, the shielding area of the blade 21 at the communication port 101 is the smallest, and the communication port 101 is at the maximum opening degree. When the blade 21 is arranged perpendicular to the opening direction of the communication port 101, the blade 21 can fully shield the communication port 101. That is, as the included angle between the blade 21 and the opening direction of the communication port 101 gradually increases, the shielding area of the blade 21 at the communication port 101 is larger, and the opening degree at the communication port 101 is reduced accordingly.

[0043] In combination with Figure 1 , Figure 2 and Figure 3As shown, the cover body 1 is a mounting carrier of the opening degree assembly, and the driving mechanism 22 is used to output a driving force to drive the blade 21 to rotate around the first axis, so as to adjust the position of the blade 21 relative to the cover body 1, so as to realize the opening degree adjustment of the communication port 101 through the angle transformation of the blade 21 at the communication port 101, and then the noise entering the passenger compartment through the pressure relief port 210 can be reduced by reducing the opening degree at the communication port 101, and the NVH (Noise, Vibration, Harshness: noise, vibration and harshness) performance of the vehicle can be improved.

[0044] It should be noted that at present, the lower rear part of the vehicle is usually provided with a pressure relief valve, and only an exhaust curtain is arranged at the area corresponding to the pressure relief valve without sound insulation and sound absorption measures. The opening area at the pressure relief valve is fixed, so that the wind noise and tire noise generated during the driving of the vehicle are transmitted to the passenger compartment side through the opening, which destroys the quietness of the rear area in the passenger compartment and affects the NVH performance of the rear space of the vehicle.

[0045] It can be understood that the opening size at the pressure relief valve is usually designed based on the air conditioning inlet and exhaust function requirements in the vehicle and the related factors of the internal pressure difference balance of the vehicle, that is, the opening area at the pressure relief valve is usually designed and developed according to the maximum functional requirement size and cannot be arbitrarily reduced, so that the opening area is redundant, and the noise leakage problem exists at the opening.

[0046] In the present application, the noise reduction device 100 is arranged at the pressure relief port 210, and the cover body 1 covers the pressure relief port 210, so that the noise entering through the pressure relief port 210 can be transmitted to the passenger compartment side only after passing through the cover body 1. At the same time, the opening degree of the communication port 101 can be adjusted by the opening degree adjusting assembly 2 in the present application, which can reduce the communication area of the communication hole and the pressure relief port 210 according to the noise reduction requirement, so as to block the noise on the transmission path of the noise, reduce the noise transmitted to the passenger compartment side, and adjust the actual communication area of the pressure relief port 210 and the passenger compartment through the noise reduction device 100, so as to avoid the too large communication area and maximize the NVH performance of the pressure relief port 210.

[0047] Combining Figure 1 and Figure 7 As shown, in some embodiments of the present application, the blade 21 comprises a blade body 211 and a rotating shaft 212, the blade body 211 is fixedly connected with the rotating shaft 212, so that the blade body 211 can rotate synchronously with the rotating shaft 212, and the rotating shaft 212 is rotatably installed on the cover body 1, and the rotating shaft 212 is connected with the driving mechanism 22, so that the driving mechanism 22 transmits the driving force to the rotating shaft 212, thereby driving the blade body 211 to rotate through the rotating shaft 212, and realizing the angle adjustment of the blade body 211 relative to the cover body 1.

[0048] It can be understood that the rotation axis of the rotating shaft 212 is the first axis, and the rotating shaft 212 can be installed on the cover body 1 in a plug-in manner. Wherein, the cover body 1 is formed with a through hole structure for the rotating shaft 212 to pass through, and the hole wall of the through hole structure can support and limit the rotating shaft 212, and the driving mechanism 22 can be arranged on the side of the cover body 1 away from the communication port 101, so as to prevent interference between the driving mechanism 22 and the blade body 211.

[0049] Referring to Figure 1 and Figure 2 , an installation seat 13 is arranged on the outer side of the cover body 1, the installation seat 13 is fixedly matched with the cover body 1, and the installation seat 13 can be used as a mounting carrier for the driving mechanism 22 to meet the assembly requirements of the driving mechanism 22. Wherein, the installation seat 13 is arranged at a position suitable for avoiding the communication port 101.

[0050] As Figure 7 shown, in some embodiments of the present application, the blade 21 further comprises a noise reduction layer 213, which is arranged on the blade body 211 in a matched manner, and the noise reduction layer 213 can be used to absorb noise energy to weaken the noise transmitted from the pressure relief port 210 to the side of the communication port 101, thereby improving the noise reduction effect of the noise reduction device 100.

[0051] It should be noted that the noise reduction layer 213 is arranged at least on the surface of the blade 21 used to shield the communication port 101 and facing the side of the pressure relief port 210, so that it can fully correspond to the pressure relief port 210 and improve the noise energy absorption effect of the noise reduction layer 213. In combination with Figure 6 and Figure 7 shown, in some embodiments, one noise reduction layer 213 is arranged in the blade 21, and the noise reduction layer 213 is arranged on one side surface of the blade body 211; in another embodiment, two noise reduction layers 213 are arranged in the blade 21, and the two noise reduction layers 213 are arranged on two opposite surfaces of the blade body 211.

[0052] Wherein, the noise reduction layer 213 is preferably constructed as a sound-absorbing PET (polyethylene terephthalate) fiber layer, which can absorb noise energy (such as high-frequency noise energy).

[0053] As Figure 5 shown, in some embodiments of the present application, the driving mechanism 22 comprises a driving motor 221 and a transmission assembly, the driving motor 221 is used to output driving force, and the transmission assembly 222 is power-connected between the driving motor 221 and the rotating shaft 212, so that the driving force output by the driving motor 221 is transmitted to the rotating shaft 212 through the transmission assembly 222, thereby driving the rotating shaft 212 to rotate, and realizing the angle adjustment of the blade 21 relative to the cover body 1.

[0054] Combination Figure 1 and Figure 5 As shown, the mounting base 13 is arranged on the outer side of the cover 1, and is also located on one side of the blade 21 in the axial direction. The mounting base 13 can be fixedly engaged with the cover 1, and the drive motor 221 can be arranged in the mounting space formed by the mounting base 13. The transmission assembly 222 is also arranged in the mounting space. The rotating shaft 212 can pass through the wall of the cover 1 and extend into the mounting space, so as to facilitate the connection and engagement of the rotating shaft 212 and the transmission assembly 222. It can also effectively prevent interference between the transmission assembly 222 and the blade body 211, which would affect the angle adjustment range of the blade 21.

[0055] like Figure 5 As shown in a further embodiment of this application, the transmission assembly 222 includes a transmission belt 2221 and a tensioning pulley 2222. The transmission belt 2221 is sleeved and connected to the output end 2211 of the rotating shaft 212 and the drive motor 221. The output end 2211 is adapted to drive the transmission belt 2221 to move, and the transmission belt 2221 further drives the rotating shaft 212 to rotate, so as to realize the rotation adjustment of the blade 21.

[0056] Reference Figure 5 As shown, in the transmission assembly 222, the position of the tensioning pulley 2222 is adjustable and used to adjust the tension of the transmission belt 2221 to ensure the reliability and stability of power transmission of the transmission belt 2221. It can be understood that the transmission assembly 222 constructs a belt drive structure, and the positions of the shaft 212 and the output end 2211 of the drive motor 221 are fixed, so that the transmission belt 2221 can be tightened by the tensioning pulley 2222 to ensure the power transmission effect of the transmission belt 2221.

[0057] It should be noted that in the axial projection of the blade 21, the output end 2211 of the drive motor 221, the rotating shaft 212 and the tensioning wheel 2222 are arranged in a triangular pattern, so that the transmission belt 2221 can be tightened by adjusting the position of the tensioning wheel 2222 relative to the output end 2211 and the rotating shaft 212.

[0058] like Figure 5 As shown in a further embodiment of this application, a groove 103 is formed on the cover 1, and the tension wheel 2222 slides in the groove 103 to adjust the position of the tension wheel 2222 relative to the output end 2211 and the rotating shaft 212 by adjusting the position of the tension wheel 2222 in the groove 103. The adjustment method is simple and highly reliable.

[0059] It should be noted that the tensioning wheel 2222 can be fixed at any position in the sliding groove 103 according to the adjustment requirement of the transmission belt 2221. That is, when it is necessary to adjust the position of the tensioning wheel 2222, the locking state of the tensioning wheel 2222 can be released to adjust the position of the tensioning wheel 2222 by driving the tensioning wheel 2222 to slide in the sliding groove 103; when it is not necessary to adjust the position of the tensioning wheel 2222, the tensioning wheel 2222 can be fixed in the sliding groove 103, so that the tensioning wheel 2222 remains in the locked state. The manner in which the tensioning wheel 2222 switches between the “locked state” and the “unlocked state” is not specifically limited here, for example: the tensioning wheel 2222 can be locked by screw fastening, and the tensioning wheel 2222 can also be locked by the damping between the part of the tensioning wheel 2222 arranged in the sliding groove 103 and the groove wall.

[0060] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in some embodiments of the present application, the noise reduction device 100 comprises a plurality of opening degree adjustment assemblies 2, the plurality of opening degree adjustment assemblies 2 are arranged in sequence along the first direction, and the first direction is perpendicular to the first axis.

[0061] Thus, the opening degree adjustment at the communication port 101 can be realized by the cooperation of the plurality of opening degree adjustment assemblies 2, the flexibility of the opening degree adjustment at the communication port 101 is enriched, and the communication area at the communication port 101 can be better matched with the working condition of the vehicle 1000.

[0062] As shown in Figure 3 and Figure 4 , when the noise reduction device 100 is provided with a plurality of opening degree adjustment assemblies 2, the plurality of blades 21 in the plurality of opening degree adjustment assemblies 2 can be cooperated to jointly shield the communication port 101 to adjust the communication mode of the communication port 101. Each opening degree adjustment assembly 2 is composed of a blade 21 and a driving mechanism 22, and the driving mechanism 22 can independently drive the blade 21 corresponding thereto, that is, the plurality of opening degree adjustment assemblies 2 can be independently controlled and adjusted, and the adjustment mode at the communication port 101 is enriched.

[0063] As shown in Figure 1 , Figure 3 and Figure 4 , in a specific embodiment of the present application, four opening degree adjustment assemblies 2 are arranged in the cover body 1, and the four opening degree adjustment assemblies 2 are arranged in sequence along the first direction, and each opening degree adjustment assembly 2 can be independently controlled, that is, the blades 21 in each opening degree adjustment assembly 2 can be kept at different rotation angles.

[0064] Referring to Figure 4As shown, two blades 21 in the first group and the third group of opening adjusting assemblies 2 arranged along the first direction maintain the same angular setting, and two blades 21 in the second group and the fourth group of opening adjusting assemblies 2 maintain the same angular setting.

[0065] It can be understood that, in the noise reduction device 100, the actual communication area of the cover body 1 at the communication port 101 with the communication area of the pressure relief port 210 is defined by the cooperation of the plurality of groups of opening adjusting assemblies 2 and the cover body 1, such as the communication area defined between two groups of adjacent opening adjusting assemblies 2 and the communication area defined between the opening adjusting assembly 2 and the cover body 1.

[0066] As shown in the further embodiments of the present application, a closed structure can be formed between two blades 21 in any two groups of adjacent opening adjusting assemblies 2, so as to sufficiently block the communication port 101 by the cooperation of the two groups of adjacent opening adjusting assemblies 2, thereby improving the ability of the noise reduction device 100 to block noise. Figure 4 It can be understood that, in the two groups of adjacent opening adjusting assemblies 2, one blade 21 can abut against the side surface of the other blade 21 facing the pressure relief port 210, so as to form the above-mentioned closed structure between the two blades 21; in the two groups of adjacent opening adjusting assemblies 2, when the two blades 21 are both vertically arranged (i.e., the blade 21 is arranged perpendicular to the opening direction of the communication port 101), the two blades 21 are coplanarly arranged, and the two edges of the two blades 21 are abutted, so as to form the above-mentioned closed structure.

[0067] In some other embodiments of the present application, a gap can be reserved between the two groups of adjacent opening adjusting assemblies 2, so that the hydraulic port and the communication port 101 are always in communication regardless of the rotation angle of the blade 21 in the opening adjusting assembly 2.

[0068] It should be noted that the noise transmitted into the passenger compartment through the pressure relief port 210 is related to the air conditioning gear position and the vehicle speed and the like, so the opening planning and configuration of the noise reduction device 100 in the vehicle 1000 in different working conditions at the communication port 101 can be planned and configured according to the vehicle type.

[0069] As shown in the further embodiments of the present application, a closed structure can be formed between two blades 21 in any two groups of adjacent opening adjusting assemblies 2, so as to sufficiently block the communication port 101 by the cooperation of the two groups of adjacent opening adjusting assemblies 2, thereby improving the ability of the noise reduction device 100 to block noise.

[0070] Figure 9 As shown, the air conditioning gear position working conditions include K1, K2, K3, …, K7, and the vehicle speed working conditions include: static, ≤60km / h, 60-80km / h, 80-100km / h, 100-120km / h, 120-140km / h, ≥140km / h.

[0071] ​The actual ventilation area of the noise reduction device 100 at the communication port 101 can be designed based on the vehicle model of the vehicle 1000 and the above-mentioned working condition types. For example, when the vehicle 1000 is static and the air conditioning gear is K1, the actual communication area of the noise reduction device 100 is A1; when the vehicle 1000 is static and the air conditioning gear is K2, the actual communication area of the noise reduction device 100 is A8; when the vehicle 1000 is in a running state and the speed is ≤60km / h, the air conditioning gear is K1, and the actual communication area of the noise reduction device 100 is A2.

[0072] Thus, the actual ventilation area of the noise reduction device 100 at the communication port 101 can be controlled according to the combined working conditions of the actual vehicle 1000 in different speed working conditions (for example, static, ≤60km / h, 60-80km / h, 80-100km / h, 100-120km / h, 120-140km / h, ≥140km / h) and air conditioning working conditions (for example, K1, K2, K3…K7) to achieve adaptive optimization of the vehicle NVH performance through control and adjustment of the noise reduction device 100. The calibration strategy and specific control method of the noise reduction device 100 are not limited here.

[0073] As shown in Figure 6 In some embodiments of the present application, the inner peripheral wall of the cover body 1 defining the communication port 101 is provided with a noise reduction cavity 102, the noise reduction cavity 102 is recessed from the inner peripheral wall to the side away from the communication port 101, and the noise reduction cavity 102 communicates with the communication port 101 to improve the noise reduction effect at the cover body 1.

[0074] It can be understood that when the noise is transmitted into the cover body 1 through the exhaust curtain, the noise can enter through the opening of the noise reduction cavity 102 to achieve resonance with the noise to weaken the noise energy. The “noise reduction cavity 102” is a Helmholtz cavity (i.e. an acoustic black hole structure) that can achieve resonance with the noise at the cover body 1, which helps to consume the energy of low-frequency noise and improve the noise reduction effect at the cover body 1.

[0075] It should be noted that the shape of the noise reduction cavity 102 is not limited again, which can be constructed as a cavity structure with a small opening and a large space (a small mouth and a large belly), or as a cavity structure with a trapezoidal or rectangular shape.

[0076] As shown in Figure 6 In some embodiments of the present application, the cover body 1 includes a cover body 11 and resonance particles 12, the cover body 11 defines the above-mentioned communication port 101 and is constructed as a hollow structure, and the noise reduction cavity 102 is formed on the cover body 11, and the resonance particles 12 are filled in the hollow structure. Thus, the noise energy can be weakened by the irregular vibration of the resonance particles 12 at the cover body 11.

[0077] The resonance particles 12 can be composed of a mixture of particles of various materials, such as sponge particles, rubber particles, etc., to achieve irregular vibration of the resonance particles 12, sufficiently weaken the noise energy, and improve the noise weakening effect of the noise reduction device 100 on the noise.

[0078] It can be understood that when the noise is transmitted into the cover body 1 through the exhaust curtain, the noise energy at the communication port 101 can enter the noise reduction cavity 102, and after the noise energy is transmitted into the noise reduction cavity 102, the noise energy can be reflected by the inner wall of the noise reduction cavity 102 to weaken the noise energy, and part of the noise energy can be transmitted to the inside of the cover body 11 (i.e., the hollow structure and the side of the resonance particles) through the wall surface defining the noise reduction cavity 102, and the vibration energy can be further weakened by the resonance particles 12 arranged in the cover body 11 to improve the noise weakening effect of the cover body 1.

[0079] The noise reduction device 100 of the present application is provided with multiple noise reduction structures (such as the resonance particles 12, the noise reduction cavity 102, etc.), thereby improving the noise energy weakening effect of the cover body 1 itself, and further cooperating with the noise reduction layer 213 formed on the blade 21 to sufficiently weaken the noise.

[0080] Specifically, when the noise is transmitted into the cover body 1 through the exhaust curtain, the noise energy resonates through the noise reduction cavity 102 of the cover body 1 to consume the low-frequency noise energy. Meanwhile, the noise energy further resonates with the resonance particles 12 inside the cover body 1 to further weaken the noise energy through the irregular vibration of the resonance particles 12, and finally the residual high-frequency noise energy is absorbed by the noise reduction layer 213 on the blade 21 to sufficiently weaken the noise energy.

[0081] The noise reduction device 100 according to the embodiments of the present application has at least the following advantages compared with the prior art:

[0082] (1) The opening of the communication port 101 is adjusted by the opening adjusting assembly 2, the communication area at the communication hole and the pressure relief port 210 can be reduced according to the noise reduction demand, the noise is blocked on the transmission path of the noise, the noise transmitted to the passenger compartment side is reduced, the actual communication area of the hydraulic port and the passenger compartment is adjusted by the noise reduction device 100, the communication area is prevented from being too large, and the NVH performance of the pressure relief port 210 is improved to the greatest extent.

[0083] (2) The noise reduction device 100 of the present application is provided with multiple noise reduction structures (such as the resonance particles 12, the noise reduction cavity 102, etc.), thereby improving the noise energy weakening effect of the cover body 1 itself, and further cooperating with the noise reduction layer 213 formed on the blade 21 to sufficiently weaken the noise.

[0084] The vehicle 1000 according to the second aspect of the present application comprises the noise reduction device 100 described above.

[0085] The vehicle with the above noise reduction device has the same advantages as the prior art, which will not be repeated here.

[0086] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0087] In the description of the present application, "first feature" and "second feature" can include one or more features.

[0088] In the description of the present application, "a plurality of" means two or more.

[0089] In the description of the present application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0090] In the description of the present application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0091] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A noise reduction device for a vehicle, characterized by, The noise reduction device is mounted on a vehicle body panel (200) of the vehicle, the vehicle body panel (200) is formed with a pressure relief port (210), and the noise reduction device comprises: a cover body (1) covering the pressure relief port (210), and the cover body (1) is formed with a communication port (101); an opening degree adjusting assembly (2) mounted on the cover body (1), and the opening degree adjusting assembly (2) comprises a vane (21) and a driving mechanism (22), the vane (21) is rotatably mounted on the cover body (1) and located at the communication port (101) about a first axis, and the driving mechanism (22) is connected with the vane (21) and used for driving the vane (21) to rotate relative to the cover body (1) to adjust the opening degree at the communication port (101).

2. The noise reducing device for a vehicle according to claim 1, characterized by, The vane (21) comprises a vane main body (211) and a rotating shaft (212), the vane main body (211) is fixedly connected with the rotating shaft (212), and the rotating shaft (212) is rotatably mounted on the cover body (1) and connected with the driving mechanism (22).

3. The noise reducing device for a vehicle according to claim 2, characterized by, The vane (21) further comprises a noise reduction layer (213) arranged on the vane main body (211) in a fit manner.

4. The noise reducing device for a vehicle according to claim 2, characterized by, The driving mechanism (22) comprises: a driving motor (221) used for outputting driving force; a transmission assembly (222) connected in power between the driving motor (221) and the rotating shaft (212).

5. The noise reducing device for a vehicle according to claim 4, characterized by, The transmission assembly (222) comprises: a transmission belt (2221) sleeved and connected on the rotating shaft (212) and an output end (2211) of the driving motor (221); a tensioning wheel (2222) adjustably arranged and used for adjusting the tightness of the transmission belt (2221).

6. The noise reducing device for a vehicle according to any one of claims 1 to 5, characterized by, The noise reduction device comprises a plurality of groups of the opening degree adjusting assemblies (2), the plurality of groups of the opening degree adjusting assemblies (2) are arranged in sequence along a first direction, and the first direction is perpendicular to the first axis.

7. The noise reducing device for a vehicle according to claim 6, characterized by, Two vanes (21) in any two groups of adjacent opening degree adjusting assemblies (2) can form a closed structure.

8. The noise reducing device for a vehicle according to claim 1, characterized by, An inner circumferential wall of the cover body (1) defining the communication port (101) is provided with a noise reduction cavity (102), the noise reduction cavity (102) is recessed from the inner circumferential wall to a side away from the communication port (101) and communicates with the communication port (101).

9. The noise reducing device for a vehicle according to claim 8, characterized by, The cover body (1) comprises: a cover main body (11) defining the communication port (101) and configured as a hollow structure, and the noise reduction cavity (102) is formed on the cover main body (11); resonance particles (12) filled in the hollow structure.

10. A vehicle characterized by comprising: The noise reduction device according to any one of claims 1-9. The noise reduction device according to any one of claims 1-9.

Images