Vehicle body noise reduction structure, cockpit and vehicle

Abstract

The embodiment of the utility model discloses a vehicle body noise reduction structure, a cab and a vehicle, the cab comprises a shell assembly and a noise reduction assembly, and the shell assembly is provided with an interlayer; the noise reduction assembly comprises an elastic containing part and a fluid charging and discharging mechanism, the fluid charging and discharging mechanism communicates with the elastic containing part, the elastic containing part is located in the interlayer, and the elastic containing part at least has a first working state and a second working state; the contact area of the elastic containing piece in the second working state and the shell assembly is larger than the contact area of the elastic containing piece in the first working state and the shell assembly, and the defects that the noise reduction capacity of a single fixed noise reduction assembly is limited, and the noise reduction effect is not obvious when the working condition and state of a vehicle are changed are overcome. And the noise reduction range of the noise reduction assembly is expanded.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle noise reduction, and in particular to a vehicle body noise reduction structure, a cockpit, and a vehicle. Background Art

[0002] The cockpit noise level is closely related to the vibration of the large sheet metal in the cockpit. Even if the corresponding target values ​​and control index requirements are met in the early design, the modal frequency of the large sheet metal in the cockpit can easily couple with the broadband excitation frequency under complex vehicle driving conditions, generating relatively large noise. This type of problem takes up a long part of the NVH problem rectification time during the prototype trial production stage, and the problem will vary depending on the status of the prototype vehicle. Utility Model Content

[0003] The embodiments of the present application provide a vehicle body noise reduction structure, a cockpit, and a vehicle, which avoid the drawbacks of a single fixed noise reduction component having limited noise reduction capability and poor noise reduction effect when the vehicle operating conditions and states change, and improve the noise reduction range of the noise reduction component.

[0004] In the first aspect, an embodiment of the present application provides a vehicle body noise reduction structure, which includes a shell assembly and a noise reduction assembly; the shell assembly has an interlayer; the noise reduction assembly includes an elastic container and a fluid charging and discharging mechanism, the fluid charging and discharging mechanism is connected to the elastic container, the elastic container is in the interlayer, the elastic container has at least a first working state and a second working state, and the contact area between the elastic container and the shell assembly when in the second working state is greater than the contact area between the elastic container and the shell assembly when in the first working state.

[0005] Based on the vehicle body noise reduction structure of the embodiment of the present application, the fluid charging and discharging structure can fill the medium into or discharge the medium from the elastic container. When the elastic container is in the first working state, it can meet the daily noise reduction needs in the vehicle. When the shell component has a sudden vibration change or the noise in the vehicle suddenly changes, the fluid charging and discharging structure fills the medium into the elastic container to expand the elastic container to the second working state. At this time, the contact area between the elastic container and the shell component is increased to reduce the vibration of the shell component and the noise in the vehicle. After the sudden vibration change of the shell component or the sudden noise change in the vehicle disappears, the fluid charging and discharging structure discharges the medium in the elastic container to restore the elastic container to the first working state. Since the elastic container can switch between at least two working states, the limited noise reduction capability of a single fixed noise reduction component is avoided, and the disadvantage of unclear noise reduction effect when the vehicle working conditions and states change is avoided, thereby improving the noise reduction range of the noise reduction component.

[0006] In some embodiments of the present application, the elastic accommodating member is configured as a wear-resistant airbag; or, the elastic accommodating member is configured as an airbag, and a wear-resistant layer is provided on the surface of the airbag.

[0007] Based on the above embodiment, since the airbag has good elasticity, after the fluid charging and discharging mechanism inflates the airbag, the airbag can fully extend in the interlayer of the shell assembly, so that the airbag can extend to all corners of the interlayer, ensuring that the vibration of each position of the shell assembly can be reduced; the airbag is a wear-resistant airbag or the airbag surface is provided with a wear-resistant layer, which can reduce the wear of the airbag by the shell assembly during the inflation and deflation of the airbag.

[0008] In some embodiments of the present application, the vehicle body noise reduction structure also includes a monitoring component and a controller, the monitoring component includes a noise monitoring component and / or a vibration monitoring component, wherein the noise monitoring component is arranged in the vehicle, and the vibration monitoring component is arranged on the shell component; the controller is respectively communicated with the monitoring component and the fluid charging and discharging mechanism.

[0009] Based on the above embodiment, the noise monitoring component is used to monitor the noise data in the shell component, and the vibration monitoring component is used to monitor the vibration data of the shell component. The noise monitoring component and the vibration monitoring component feed back the above data to the controller, and the controller controls the fluid filling and discharging mechanism to inflate or exhaust the elastic container according to the noise data and / or vibration data fed back by the monitoring component.

[0010] In a second aspect, an embodiment of the present application provides a cockpit, which includes the vehicle body noise reduction structure as described above.

[0011] The cockpit according to the embodiment of the present application has the above-mentioned vehicle body noise reduction structure, so the cockpit has less vibration and less noise, thereby providing the passengers with a good driving experience.

[0012] In some embodiments of the present application, the cockpit includes a rear enclosure structure and a roof structure that are interconnected, and the rear enclosure structure and the roof structure both include the shell assembly. The number of the noise reduction assemblies is two, and the two noise reduction assemblies include a first noise reduction assembly and a second noise reduction assembly. The elastic receiving part of the first noise reduction assembly is located in the interlayer of the rear enclosure structure, and the elastic receiving part of the second noise reduction assembly is located in the interlayer of the roof structure.

[0013] Based on the above embodiments, since the working conditions of the roof structure and the rear enclosure structure are different during the movement of the vehicle, the vibrations generated by the roof structure and the rear enclosure structure are independent of each other. The elastic receiving member of the first noise reduction component reduces the noise of the rear enclosure structure, and the elastic receiving member of the second noise reduction component reduces the noise of the roof structure, which can save vehicle energy while ensuring the noise reduction effect of the cockpit.

[0014] In some embodiments of the present application, the rear enclosure structure includes a rear enclosure reinforcement beam, a rear enclosure outer panel and a rear enclosure inner guard plate, the rear enclosure outer panel and the rear enclosure inner guard plate are both fixed to the rear enclosure reinforcement beam and form an interlayer of the rear enclosure structure; the elastic receiving member of the first noise reduction component is fixed to the rear enclosure outer panel and / or the rear enclosure inner guard plate.

[0015] Based on the above embodiment, after the fluid charging and discharging mechanism fills the medium into the elastic container of the first noise reduction component, the elastic container of the first noise reduction component expands in the rear panel interlayer to reduce the vibration of the rear panel outer panel and reduce the noise transmitted into the shell component through the shell component when the rear panel outer panel vibrates.

[0016] In some embodiments of the present application, the ceiling structure includes a ceiling reinforcement beam, a ceiling outer panel and a ceiling inner guard panel, the ceiling reinforcement beam, the ceiling outer panel and the ceiling inner guard panel are all connected to the rear surrounding structure, the ceiling outer panel and the ceiling inner guard panel are both fixed to the ceiling reinforcement beam and form a mezzanine of the ceiling structure, and the elastic receiving member of the second noise reduction component is fixed to the ceiling outer panel and / or the ceiling inner guard panel.

[0017] Based on the above embodiment, after the fluid filling and discharging mechanism fills the medium into the elastic container of the second noise reduction component, the elastic container of the second noise reduction component expands in the ceiling interlayer to reduce the vibration of the ceiling outer panel and reduce the noise transmitted into the vehicle through the shell component when the ceiling outer panel vibrates.

[0018] In some embodiments of the present application, the cockpit is further provided with a vibration monitoring component and a controller; the number of the vibration monitoring components is two groups, each group of the vibration monitoring components includes a plurality of vibration sensors, wherein the plurality of vibration sensors of one group of the vibration monitoring components are fixed to the ceiling structure, and the plurality of vibration sensors of the other group of the vibration monitoring components are fixed to the rear structure, and the plurality of vibration sensors in the two groups of the vibration monitoring components are both communicatively connected to the controller.

[0019] Based on the above embodiments, the multiple sensors in each group of vibration monitoring components can cover various parts of the roof structure or the rear enclosure structure to monitor the vibrations of various parts of the roof structure or the rear enclosure structure. The controller receives the vibration data fed back by the vibration sensor and controls the fluid charging and discharging mechanism according to the vibration data.

[0020] In some embodiments of the present application, a noise monitoring component is further provided inside the cockpit, and the noise monitoring component is provided on the driver's seat and close to the driver's ear.

[0021] Based on the above embodiment, the noise monitoring component is used to monitor the noise in the cockpit. By arranging the noise monitoring component in the housing assembly near the driver's ear, the noise monitored by the noise monitoring component can be close to the noise heard by the driver.

[0022] In a third aspect, an embodiment of the present application provides a vehicle, which includes the cockpit as described above.

[0023] Based on the vehicle in the embodiment of the present application, since it has the above-mentioned cockpit and the cockpit has the above-mentioned body noise reduction structure, the vehicle produces lower noise and the driver has a better driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of a cockpit in one embodiment of the present application;

[0026] Figure 2 This is a structural schematic diagram of the rear enclosure structure in one embodiment of the present application after the rear enclosure outer panel is removed;

[0027] Figure 3 This is a structural diagram of the rear enclosure structure in one embodiment of the present application after removing the rear enclosure outer plate and the first elastic receiving member;

[0028] Figure 4 This is a structural diagram of the roof structure in one embodiment of the present application after removing the fixed roof outer plate;

[0029] Figure 5 This is a schematic structural diagram of the ceiling structure in one embodiment of the present application after removing the ceiling outer plate and the second elastic receiving member.

[0030] Figure numerals: 10, cockpit; 11, rear enclosure structure; 111, rear enclosure reinforcement beam; 112, rear enclosure outer panel; 113, rear enclosure inner guard plate; 12, roof structure; 121, roof reinforcement beam; 122, roof outer panel; 123, roof inner guard plate; 21, noise monitoring component; 22, vibration monitoring assembly; 221, vibration sensor; 31a, first elastic container; 32a, first fluid charging and discharging mechanism; 31b, second elastic container; 32b, second fluid charging and discharging mechanism. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] The cockpit's noise level is closely related to the vibration of the cockpit's large sheet metal. The inventors discovered that even if the corresponding target values ​​and control indicators were met in the early design phase, the modal frequencies of the cockpit's large sheet metal could easily couple with the broadband excitation frequency under complex vehicle driving conditions, resulting in significant vibration. This type of problem occupied a significant portion of the time spent on NVH (Noise, Vibration, Harshness) rectification during the prototype production phase, and the problem varied depending on the prototype's state, significantly impacting time and wasting manpower and resources. Broadband excitation frequency refers to the excitation signal having a wide frequency range, covering multiple frequency bands.

[0033] According to the tuning of the prototype vehicle, when the sheet metal is stimulated and vibrates, it is very easy to generate loud noise problems. In severe cases, it may even cause roaring problems at a certain speed or multiple speeds, which seriously affects the driver's experience and even affects the vehicle's listing.

[0034] First, please refer to Figures 1 to 2 As shown, an embodiment of the present application provides a vehicle body noise reduction structure, which includes a shell assembly and a noise reduction assembly, the shell assembly has an interlayer; the noise reduction assembly includes an elastic container and a fluid charging and discharging mechanism, the fluid charging and discharging mechanism is connected to the elastic container, the elastic container is in the interlayer, the elastic container has at least a first working state and a second working state, and the contact area between the elastic container and the shell assembly when in the second working state is greater than the contact area between the elastic container and the shell assembly when in the first working state.

[0035] The fluid charging and discharging structure can fill a medium into or discharge a medium from the elastic container. The medium can be a fluid such as a liquid or a gas. In the present embodiment, the medium is preferably a gas. Preferably, the fluid charging and discharging mechanism is used to supply air to or discharge the gas from the elastic container. The fluid charging and discharging mechanism in the embodiment of the present application may include an inflator and an exhaust member. The exhaust member may be configured as an electrically controlled valve or an exhaust pump. The inflator may use the vehicle's original inflator, for example, the vehicle's brake air supply system. In this case, it is only necessary to connect the elastic container to the vehicle's brake air supply system. The inflator may also be configured as an air compressor. However, in this case, the air compressor needs to be connected to the outside of the housing assembly so that the air compressor can compress the gas in the environment.

[0036] In some embodiments of the present application, the fluid charging and discharging mechanism may also include an interconnected gas storage member and a pressurizing member. The pressurizing member is in communication with the elastic container, with a control valve disposed therebetween. When the pressurizing member is not operating and the control valve is open, the high-pressure medium in the gas storage device enters the elastic container. When the pressurizing member is operating and the control valve is open, the pressurizing member compresses the high-pressure medium in the elastic container into the gas storage member. In this case, the high-pressure medium can be reused repeatedly. The high-pressure medium in the embodiments of the present application may be gas or liquid.

[0037] The elastic container can have multiple working states, and each working state can only have a noise reduction effect on noise of a specific frequency and intensity. In a preferred embodiment of the present application, the elastic container has two working states, namely a first working state and a second working state.

[0038] It is understood that when the elastic container is in the first working state, the elastic container is either not filled with a medium or filled with a certain amount of medium. In the embodiment of the present application, when the elastic container is in the first working state, preferably a small amount of medium is filled in the elastic container, and the pressure inside the elastic container is equal to the external atmospheric pressure. When the elastic container is in the second working state, a large amount of medium is filled in the elastic container, and the pressure inside the elastic container is greater than the external atmospheric pressure.

[0039] Based on the vehicle body noise reduction structure of the embodiment of the present application, the fluid charging and discharging structure can fill the medium into the elastic container or discharge the medium. When the elastic container is in the first working state, it can meet the daily noise reduction needs in the vehicle. When the state or working condition of the vehicle changes, resulting in a sudden vibration change in the shell component 10 (that is, a sudden increase in vibration displacement or amplitude) or a sudden noise change in the vehicle (that is, a sudden increase in noise intensity), the fluid charging and discharging structure fills the medium into the elastic container to expand the elastic container to the second working state. At this time, the contact area between the elastic container and the shell component is increased to reduce the vibration of the shell component and the noise in the vehicle; after the sudden vibration change of the shell component or the sudden noise change in the vehicle disappears, the fluid charging and discharging structure discharges the medium in the elastic container to restore the elastic container to the first working state. Since the elastic container can switch between at least two working states, the disadvantages of a single fixed noise reduction component with limited noise reduction capability and unclear noise reduction effect when the vehicle working condition and state change are avoided, thereby improving the noise reduction range of the noise reduction component. In the embodiment of the present application, the elastic container may further have a third inflation state, a fourth inflation state, etc., to correspond to multiple bands of multiple broadband excitation frequencies, thereby further improving the noise reduction range of the noise reduction component.

[0040] In some embodiments of the present application, the elastic container is configured as a wear-resistant airbag; or, the elastic container is configured as an airbag, and a wear-resistant layer is provided on the surface of the airbag. The airbag has good elasticity, and after the fluid charging and discharging mechanism inflates the airbag, the airbag can be fully extended in the interlayer of the shell assembly, so that the airbag can extend to all corners of the interlayer, ensuring that the elastic container can reduce the vibration of various positions of the shell assembly; the airbag is a wear-resistant airbag or the airbag surface is provided with a wear-resistant layer, which can reduce the wear of the airbag by the shell assembly during the inflation and deflation of the airbag.

[0041] The wear-resistant airbag in the embodiment of the present application can be configured as a TPU (Thermoplastic Urethane) airbag; the wear-resistant layer on the outer surface of the airbag can be a wear-resistant coating, etc.

[0042] In some embodiments of the present application, the vehicle body noise reduction structure also includes a monitoring component and a controller, the monitoring component includes a noise monitoring component and / or a vibration monitoring component 22, wherein the noise monitoring component is arranged inside the vehicle and the vibration monitoring component 22 is arranged on the shell component; the controller is respectively communicated with the monitoring component and the fluid charging and discharging mechanism.

[0043] The noise monitoring component is used to monitor the noise data in the shell component, and the vibration monitoring component 22 is used to monitor the vibration data of the shell component. The noise monitoring component and the vibration monitoring component 22 feed back the above data to the controller, and the controller controls the fluid charging and discharging mechanism to inflate or exhaust the elastic container according to the noise data and / or vibration data fed back by the monitoring component. Specifically, when the monitoring component only includes the noise monitoring component, the noise data is greater than the preset intensity data, and the controller controls the fluid charging and discharging mechanism to inflate or exhaust the elastic container; when the monitoring component only includes the vibration monitoring component 22, the vibration data is greater than the preset vibration data, and the controller controls the fluid charging and discharging mechanism to inflate or exhaust the elastic container; when the monitoring component includes the noise monitoring component and the vibration monitoring component 22, the noise data is greater than the preset intensity data and the vibration data is greater than the preset vibration data, and the controller controls the fluid charging and discharging mechanism to inflate or exhaust the elastic container.

[0044] The controller is used to receive the signal of the monitoring component and control the fluid charging and discharging mechanism to inflate the noise reduction component according to the signal. The controller in the embodiment of the present application can be the vehicle ECU (electronic control unit), or an independent controller can be provided to control the fluid charging and discharging mechanism; the above-mentioned fluid charging and discharging structure includes an inflator and an electric control valve for exhaust, and the inflator and the electric control valve are both communicatively connected to the controller.

[0045] In some embodiments of the present application, the noise reduction assembly may further include a porous noise reduction member disposed within the elastic receiving member. The porous noise reduction member has a porosity P, where 0.7 ≤ P ≤ 0.8; for example, 0.72, 0.74, 0.76, or 0.78. Porosity refers to the percentage of the pore volume in a bulk material to the total volume of the material in its natural state.

[0046] Porous material is a highly porous material containing a large number of tiny pores and gas cavities. These pores can form a complex acoustic field distribution inside the material, thereby absorbing, reflecting and scattering noise waves, thereby achieving the effect of reducing noise. In this way, after the porous noise reduction component is configured as a porous noise reduction component, the porous noise reduction component itself can absorb noise and use its own elastic properties due to its porosity to buffer the vibration generated by the shell component; when the fluid filling and discharging mechanism supplies air to the elastic container, after the medium enters the elastic container, the medium causes the porous noise reduction component to further expand, further enhancing the noise reduction and vibration reduction capabilities of the porous noise reduction component.

[0047] In a second aspect, an embodiment of the present application provides a cockpit 10, which includes the above-mentioned vehicle body noise reduction structure.

[0048] Based on the cockpit 10 of the embodiment of the present application, due to the above-mentioned vehicle body noise reduction structure, the cockpit 10 has less vibration and less noise inside the cockpit 10.

[0049] The housing assembly in the embodiment of the present application can be configured as at least a partial housing of the cockpit 10. It is understandable that the housing assembly can also be applied to other parts of the vehicle besides the cockpit 10, such as the vehicle compartment.

[0050] Please refer to Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5 As shown, in some embodiments of the present application, the cockpit 10 includes a rear enclosure structure 11 and a roof structure 12 that are interconnected. Both the rear enclosure structure 11 and the roof structure 12 include a shell assembly. There are two noise reduction assemblies, including a first noise reduction assembly and a second noise reduction assembly. The elastic receiving member of the first noise reduction assembly is located within the interlayer of the rear enclosure structure 11, and the elastic receiving member of the second noise reduction assembly is located within the interlayer of the roof structure 12. For ease of distinction, the present application refers to the elastic receiving member of the first noise reduction assembly as the first elastic receiving member 31a, and the elastic receiving member of the second noise reduction assembly as the second elastic receiving member 31b.

[0051] Since the roof structure 12 and the rear enclosure structure 11 have different working conditions during vehicle movement, the vibrations generated by the roof structure 12 and the rear enclosure structure 11 are independent of each other. The first elastic accommodating member 31a reduces the noise of the roof structure 12, and the second elastic accommodating member 31b reduces the noise of the rear enclosure structure 11, which can save vehicle energy while ensuring the noise reduction effect of the shell component.

[0052] It is understandable that please refer to Figure 2 、 Figure 3 、 Figure 4 as well as Figure 5 As shown, in some embodiments of the present application, for ease of distinction, the present application refers to the fluid charging and discharging mechanism of the first noise reduction component by the first fluid charging and discharging mechanism 32a, and the fluid charging and discharging mechanism of the second noise reduction component by the second fluid charging and discharging mechanism 32b. The first fluid charging and discharging mechanism 32a can be in communication with the first elastic accommodating member 31a, and the second fluid charging and discharging mechanism 32b can be in communication with the second elastic accommodating member 31b.

[0053] Please refer to Figure 1 as well as Figure 2 As shown, in some embodiments of the present application, the rear enclosure structure 11 includes a rear enclosure reinforcement beam 111, a rear enclosure outer panel 112 and a rear enclosure inner guard plate 113, the rear enclosure outer panel 112 and the rear enclosure inner guard plate 113 are both fixed to the rear enclosure reinforcement beam 111 and form an interlayer of the rear enclosure structure 11; the elastic receiving member of the first noise reduction component is fixed to the rear enclosure outer panel 112 and / or the rear enclosure inner guard plate 113.

[0054] After the first fluid filling and discharging mechanism 32a fills the medium into the first elastic container 31a, the first elastic container 31a expands in the interlayer of the rear enclosure structure 11, reducing the vibration of the rear enclosure outer panel 112 and reducing the noise transmitted from the rear enclosure outer panel 112 to the cockpit 10.

[0055] The rear enclosure reinforcement beam 111 is used to support the sheet metal parts of the rear enclosure (the rear enclosure outer panel 112 and the rear enclosure inner guard plate 113). The rear enclosure reinforcement beam 111 is usually a rectangular tube, and its interior is hollow and has a relatively light weight while having sufficient structural strength. In combination with the above-mentioned fluid charging and discharging mechanism including the first fluid charging and discharging mechanism 32a, in some embodiments of the present application, the first fluid charging and discharging mechanism 32a can be installed in the rear enclosure reinforcement beam 111 or in the door pillar. It can be understood that there are multiple rear enclosure reinforcement beams 111, and the first fluid charging and discharging mechanism 32a can be installed in any rear enclosure reinforcement beam 111, or a partition space can be formed in the door pillar (such as the A-pillar, B-pillar, C-pillar, etc.) through a partition, and the first fluid charging and discharging mechanism 32a can be installed in the partition space.

[0056] It can be understood that multiple rear enclosure reinforcement beams 111 divide the interlayer of the rear enclosure structure 11 into multiple rear enclosure sub-interlayers. At this time, the corresponding first elastic receiving parts 31a can be set to multiple, and the multiple first elastic receiving parts 31a are respectively located in the corresponding rear enclosure sub-interlayers. The first fluid charging and discharging mechanism 32a can simultaneously connect multiple first elastic receiving parts 31a, and a control valve is provided between the first fluid charging and discharging mechanism 32a and each first elastic receiving part 31a, so that the first fluid charging and discharging mechanism 32a can charge or discharge the medium into or out of each first elastic receiving part 31a separately.

[0057] The rear outer panel 112 and the rear inner panel 113 are both sheet metal components. The noise generated by the rear structure 11 originates from the vibration of the rear outer panel 112. In the embodiment of the present application, the first elastic receiving member 31a is mounted on the rear inner panel 113. When inflated, the first elastic receiving member 31a mostly abuts the rear outer panel 112, increasing the contact area among the first elastic receiving member 31a, the rear outer panel 112, and the rear inner panel 113. The rear outer panel 112 and the rear inner panel 113 are common vehicle components. In the embodiment of the present application, the rear back panel and the rear outer panel 112 are not described in detail.

[0058] Please refer to Figure 4 as well as Figure 5 As shown, in some embodiments of the present application, the roof structure 12 includes a roof reinforcement beam 121, a roof outer panel 122 and a roof inner guard panel 123, the roof reinforcement beam 121, the roof outer panel 122 and the roof inner guard panel 123 are all connected to the rear surrounding structure 11, the roof outer panel 122 and the roof inner guard panel 123 are both fixed to the ceiling reinforcement beam 121 and form a sandwich layer of the roof structure 12, and the elastic receiving member of the second noise reduction component is fixed to the ceiling outer panel 122 and / or the ceiling inner guard panel 123.

[0059] After the second fluid charging and discharging mechanism 32 b fills the second elastic receiving member 31 b with the medium, the second elastic receiving member 31 b expands in the ceiling interlayer, reducing the vibration of the ceiling outer panel 122 .

[0060] The ceiling reinforcement beam 121 is used to support the sheet metal parts of the ceiling (the ceiling outer plate 122 and the ceiling inner guard plate 123). The ceiling reinforcement beam 121 is usually a rectangular tube, and its interior is hollow. While having sufficient structural strength, it also has a light weight. In combination with the above-mentioned fluid charging and discharging mechanism, it includes a second fluid charging and discharging mechanism 32b. In some embodiments of the present application, the second fluid charging and discharging mechanism 32b can be installed in the ceiling reinforcement beam 121 or in the door pillar. It can be understood that the number of ceiling reinforcement beams 121 can be multiple, and the second fluid charging and discharging mechanism 32b can be installed in any ceiling reinforcement beam 121, or a partition space can be formed in the door pillar (such as A-pillar, B-pillar, C-pillar, etc.) through a partition. The first fluid charging and discharging mechanism 32a can be installed in the partition space, and the ceiling reinforcement beam 121 is connected to the corresponding rear reinforcement beam 111.

[0061] It can be understood that multiple ceiling reinforcement beams 121 divide the ceiling interlayer into multiple ceiling sub-interlayers. At this time, the second elastic container 31b can be set to multiple, and the multiple second elastic containers 31b are respectively located in the corresponding ceiling sub-interlayers. The second fluid charging and discharging mechanism 32b can simultaneously connect multiple second elastic containers 31b. A control valve is set between the second fluid charging and discharging mechanism 32b and each second elastic container 31b, so that the second fluid charging and discharging mechanism 32b can charge or discharge the medium into each second elastic container 31b separately.

[0062] The roof outer panel 122 and the roof inner panel 123 are both sheet metal parts. The noise generated by the roof structure 12 comes from the vibration of the roof outer panel 122. In the embodiment of the present application, the second elastic receiving member 31b is installed on the roof inner panel 123. After the second elastic receiving member 31b is inflated, it abuts the roof outer panel 122. The roof outer panel 122 and the roof inner panel 123 are commonly used components of a vehicle. The roof outer panel 122 is connected to the rear outer panel 112, and the roof inner panel 123 is connected to the rear inner panel 113. In the embodiment of the present application, the roof back panel and the roof outer panel 122 are not described in detail.

[0063] Please refer to Figure 1 As shown, in some embodiments of the present application, the cockpit 10 is further provided with a vibration monitoring component 22; the number of the vibration monitoring components 22 is two groups, and each group of vibration monitoring components 22 includes multiple vibration sensors 221, wherein the multiple vibration sensors 221 of one group of vibration monitoring components 22 are fixed to the roof structure 12, and the multiple vibration sensors 221 of the other group of vibration monitoring components 22 are fixed to the rear structure 11, and the multiple vibration sensors 221 in the two groups of vibration monitoring components 22 are both communicatively connected to the controller.

[0064] The multiple sensors within each set of vibration monitoring assemblies 22 can cover various locations of the roof structure 12 or the rear enclosure structure 11 to monitor the vibration (i.e., vibration displacement or vibration amplitude) of each location of the roof structure 12 or the rear enclosure structure 11. In the embodiment of the present application, the vibration monitoring assemblies 22 are arranged at weak locations of the roof structure 12 or the rear enclosure structure 11, away from the roof reinforcement beams 121 or the rear enclosure reinforcement beams 111. This facilitates monitoring of sudden changes in vibration of the roof structure 12 or the rear enclosure structure 11.

[0065] In view of the fact that the interlayer of the above-mentioned roof structure 12 is divided into multiple roof sub-interlayers by multiple roof reinforcement beams 121 and the interlayer of the rear enclosure structure 11 is divided into multiple rear enclosure sub-interlayers by multiple rear enclosure reinforcement beams 111, the specific arrangement position of the vibration sensor 221 is selected in the middle of the ceiling sub-interlayer, so that the vibration sensor 221 is as far away from the ceiling reinforcement beams 121 or the rear enclosure reinforcement beams 111 as possible to ensure that the vibration sensor 221 can monitor the position of the rear enclosure outer panel 112 or the roof outer panel 122 that is most likely to vibrate and has the largest vibration amplitude.

[0066] In some embodiments of the present application, a noise monitoring component 21 is further provided inside the cockpit 10 . The noise monitoring component 21 is provided on the driver's seat and close to the driver's ears.

[0067] Based on the above embodiment, the noise monitoring element 21 is used to monitor the noise in the cockpit 10. The noise monitoring element 21 is arranged in the housing assembly near the driver's ear, so that the noise monitored by the noise monitoring element 21 is close to the noise heard by the driver.

[0068] The noise monitoring component 21 is used to monitor the noise inside the shell assembly. By arranging the noise monitoring component 21 in the shell assembly near the driver's ear, the noise monitored by the noise monitoring component 21 can be close to the noise heard by the driver. Specifically, the noise monitoring component 21 is fixed to the inner guard plate of the side of the cockpit 10 near the driver.

[0069] In some embodiments of the present application, the controller can analyze the intensity and frequency of the noise after receiving the data feedback from the noise monitoring component 21. In this way, the two types of noise that have the greatest impact on the driver are monitored to ensure that the driver has a good auditory environment.

[0070] The present application also provides a measurement method, which is applied to the above-mentioned controller and specifically includes:

[0071] Obtain in-vehicle noise data, analyze the intensity data in the noise data, compare the intensity data at the same frequency with the preset intensity data, and obtain vibration data (i.e., vibration displacement data or vibration amplitude data) of each sensor 221 when the intensity data is greater than the preset intensity data.

[0072] The process of acquiring in-vehicle noise data, analyzing the intensity data within the noise data, and comparing the intensity data with a preset intensity data at the same frequency may include acquiring noise data multiple times, analyzing the intensity data within the noise data multiple times, and determining that the intensity data exceeds the preset intensity data when the intensity data exceeds the preset intensity data multiple times in a row. For example, the noise monitoring component 21 may provide noise data feedback every 20 seconds. If the intensity data exceeds the preset intensity data three times in a row, the controller may receive vibration data (i.e., vibration displacement data or vibration amplitude data) from the multiple sensors 221.

[0073] Compare the vibration data of each sensor 221 with the preset vibration data. When the vibration data is greater than the preset vibration data, generate and send an inflation control instruction to the corresponding fluid filling and discharging mechanism. The inflation control instruction is used to control the corresponding fluid filling and discharging mechanism to supply air to the corresponding elastic container.

[0074] Specifically, when the vibration data of any sensor 221 is greater than the preset vibration data, the controller controls the fluid charging and discharging mechanism to inflate the elastic container at the corresponding position of the sensor 221. The elastic container expands after the gas is introduced, and the volume of the elastic container increases significantly. The contact area between the elastic container and the rear outer panel 112 or the roof outer panel 122 increases, absorbing the deformation caused by the vibration or resonance of the rear outer panel 112 or the roof outer panel 122 (the noise of the cockpit 10 is mainly caused by the resonance of the rear outer panel 112 and the roof outer panel 122), avoiding the roaring problem caused by the rear outer panel 112 or the roof outer panel 122 pressing the interlayer of the cockpit 10, until the noise in the car suddenly returns to normal levels.

[0075] Obtain optimized vibration data of the vibration sensor 221, and compare the optimized vibration data with the preset vibration data; when the optimized vibration data is smaller than the preset vibration data, generate and send an exhaust control instruction to the fluid charging and discharging mechanism, and the exhaust control instruction is used to control the corresponding fluid charging and discharging mechanism to exhaust the corresponding elastic container.

[0076] Among them, the optimized vibration data of the vibration sensor 221 is obtained, and when the optimized vibration data is less than the preset vibration data, an exhaust control instruction is generated and sent to the fluid charging and discharging mechanism, including: obtaining multiple optimized vibration data, and when the optimized vibration data is less than the preset intensity data for multiple consecutive times, it is considered that the optimized vibration data is less than the preset intensity data.

[0077] Specifically, multiple vibration sensors 221 continue to monitor the vibration of the rear outer panel 112 and the roof outer panel 122, and obtain optimized vibration data every 20 seconds. When the optimized vibration data is less than the optimized vibration data for the third consecutive time, the corresponding fluid filling and discharging mechanism is activated to exhaust the inflated elastic container to restore it to its original state.

[0078] The intensity data in the above method can be replaced by vibration data; at this time, the vibration frequency of the roof outer panel 122 and the rear outer panel 112 can be controlled according to the same method; the vibration data can be the vibration frequency or amplitude, etc.

[0079] In a third aspect, an embodiment of the present application provides a vehicle, which includes the cockpit 10 as described above.

[0080] Based on the vehicle in the embodiment of the present application, since it has the above-mentioned cockpit 10 and the cockpit 10 has the above-mentioned body noise reduction structure, the vehicle generates lower noise and the driver has a better driving experience.

[0081] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0082] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle body noise reduction structure, characterized in that: include: a housing assembly having an interlayer; as well as, A noise reduction component, the noise reduction component includes an elastic container and a fluid charging and discharging mechanism, the fluid charging and discharging mechanism is connected to the elastic container, the elastic container is located in the interlayer, the elastic container has at least a first working state and a second working state, and the contact area between the elastic container and the shell component when in the second working state is greater than the contact area between the elastic container and the shell component when in the first working state.

2. The vehicle body noise reduction structure according to claim 1, wherein: The elastic accommodating member is configured as a wear-resistant airbag; or, the elastic accommodating member is configured as an airbag, and a wear-resistant layer is provided on the surface of the airbag.

3. The vehicle body noise reduction structure according to claim 1, wherein: The vehicle body noise reduction structure further includes: a monitoring component, the monitoring component including a noise monitoring component and / or a vibration monitoring component, wherein the noise monitoring component is disposed in the vehicle, and the vibration monitoring component is disposed on the housing component; and A controller is communicatively connected with the monitoring component and the fluid charging and discharging mechanism respectively.

4. A cockpit, characterized in that: include: The vehicle body noise reduction structure according to any one of claims 1 to 3.

5. The cockpit according to claim 4, characterized in that The cockpit includes a rear enclosure structure and a roof structure that are interconnected, and both the rear enclosure structure and the roof structure include the shell assembly. There are two noise reduction assemblies, and the two noise reduction assemblies include a first noise reduction assembly and a second noise reduction assembly. The elastic receiving part of the first noise reduction assembly is located in the interlayer of the rear enclosure structure, and the elastic receiving part of the second noise reduction assembly is located in the interlayer of the roof structure.

6. The cockpit according to claim 5, characterized in that The rear enclosure structure includes a rear enclosure reinforcement beam, a rear enclosure outer panel and a rear enclosure inner guard plate. The rear enclosure outer panel and the rear enclosure inner guard plate are both fixed to the rear enclosure reinforcement beam and form an interlayer of the rear enclosure structure; the elastic receiving member of the first noise reduction component is fixed to the rear enclosure outer panel and / or the rear enclosure inner guard plate.

7. The cockpit according to claim 5, characterized in that The ceiling structure includes a ceiling reinforcement beam, a ceiling outer panel and a ceiling inner guard panel. The ceiling reinforcement beam, the ceiling outer panel and the ceiling inner guard panel are all connected to the rear surrounding structure. The ceiling outer panel and the ceiling inner guard panel are both fixed to the ceiling reinforcement beam and form a mezzanine of the ceiling structure. The elastic receiving member of the second noise reduction component is fixed to the ceiling outer panel and / or the ceiling inner guard panel.

8. The cockpit according to claim 5, characterized in that The cockpit is also provided with a vibration monitoring component and a controller; the number of the vibration monitoring components is two groups, each group of the vibration monitoring components includes multiple vibration sensors, wherein the multiple vibration sensors of one group of the vibration monitoring components are fixed to the ceiling structure, and the multiple vibration sensors of the other group of the vibration monitoring components are fixed to the rear structure, and the multiple vibration sensors in the two groups of the vibration monitoring components are both communicatively connected to the controller.

9. The cockpit according to claim 8, characterized in that A noise monitoring component is also provided inside the cockpit. The noise monitoring component is provided on the driver's seat and close to the driver's ear.

10. A vehicle, characterized in that: include: A cockpit as claimed in any one of claims 4 to 9.

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