Silencing device and vehicle

Abstract

The utility model provides a silencing device and a vehicle and relates to the technical field of vehicle parts, the silencing device comprises a silencing unit and an installation unit arranged on the silencing unit, the installation unit comprises an installation seat connected with the silencing unit and a sliding portion arranged on the installation seat in a sliding mode, and the sliding portion is arranged on the installation seat in a sliding mode. The sliding driving part is in transmission connection with the sliding part, and the sliding part is driven by the sliding driving part to move from the position close to the silencing unit to the position away from the silencing unit and abut against the side wall of the containing cavity so that the silencing unit can be fixed in the containing cavity. According to the silencing device, the silencing unit is the main functional part of the structure and is used for achieving the silencing effect, the installation unit is used for ensuring that the silencing unit can be installed in the containing cavity, and the silencing device has certain adjustment and adaptability and can better adapt to containing cavities of different shapes and sizes.

Description

Technical Field

[0001] This utility model relates to the field of vehicle component technology, and in particular to a noise reduction device. Furthermore, this utility model also relates to vehicles using this noise reduction device. Background Technology

[0002] In the design process of existing vehicle models, regular-sized white cotton blocks are generally filled into the rear side panel cavity (i.e., the cavity formed by the outer sheet metal of the rear side panel and the outer sheet metal of the rear wheel arch, hereinafter referred to as "rear side panel cavity") to absorb noise.

[0003] With the development of hybrid vehicles, the rear side panel needs to accommodate high-voltage charging ports, which increases the demand for surrounding space. This makes the rear side panel cavity smaller. In addition, the irregular shape of the rear side panel cavity makes it impossible to place large white cotton blocks inside the rear side panel cavity.

[0004] Because it is impossible to place large white cotton blocks, there are weak sound insulation paths in the rear side cavity area, which can easily cause tire noise, chassis wind noise and other noises to leak into the car from the weak points, affecting the driving and riding experience. Utility Model Content

[0005] In view of this, the present invention aims to provide a noise reduction device suitable for installation in cavities of different shapes.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A noise reduction device is used for installation into a receiving cavity, the noise reduction device including a noise reduction unit and a mounting unit disposed on the noise reduction unit;

[0008] The mounting unit includes a mounting base connected to the silencing unit, a sliding part slidably disposed on the mounting base, and a sliding drive part pulsatingly connected to the sliding part;

[0009] The sliding part is driven by the sliding drive part, and can move from a position close to the silencing unit to a position away from the silencing unit, and abut against the side wall of the receiving cavity, thereby fixing the silencing unit in the receiving cavity.

[0010] Furthermore, the mounting base is provided with a sliding groove, and the sliding part includes a sliding rod embedded in the sliding groove and a foaming part provided on the sliding rod;

[0011] The sliding part abuts against the side wall of the receiving cavity through the foaming part, and the foaming part can expand when heated.

[0012] Furthermore, there are multiple sliding parts, and each of the multiple sliding parts is connected to the sliding drive part in a driving connection.

[0013] The plurality of sliding portions are driven by the sliding drive portion and can slide simultaneously relative to the mounting base.

[0014] Furthermore, the sliding drive unit includes a drive member rotatably mounted on the mounting base. The sliding drive unit is connected to multiple sliding parts via the drive member, and the sliding directions of the multiple sliding parts are all arranged intersecting the rotation center of the drive member.

[0015] Furthermore, the driving component includes a driving disk rotatably mounted on the mounting base. The driving disk and each of the sliding portions are connected by a guide structure. Each guide structure includes a guide groove on the driving disk and a guide post on the sliding portion. The guide post is inserted into the guide groove.

[0016] Furthermore, the sliding drive unit also includes a drive wheel rotatably mounted on the mounting base, and the drive wheel is meshed with the drive member; and / or,

[0017] The drive component is rotatably mounted on the mounting base via a bearing. A gripping part is provided on the side of the drive component facing away from the mounting base, and the gripping part is arranged close to the bearing.

[0018] Furthermore, the driving component includes a driving ring rotatably disposed on the mounting base, and a plurality of driving wheels meshing with the driving ring;

[0019] Each of the driving wheels corresponds to one of the sliding parts, and the corresponding driving wheel is engaged with the sliding part.

[0020] Furthermore, the silencing unit includes a housing having a cavity, and a granular filler filling the cavity;

[0021] The side wall of the shell is provided with a plurality of sound-permeable holes, and the diameter of the sound-permeable holes is smaller than the particle size of the filler.

[0022] Furthermore, the silencing unit is elongated, with mounting units at both ends along its length, and the sliding direction of the sliding part is orthogonal to the length direction of the silencing unit.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] The silencing device of this utility model mainly comprises two parts: a silencing unit and a mounting unit. The silencing unit is the main functional part of the structure, used to achieve the silencing effect, while the mounting unit ensures that the silencing unit can be installed within the receiving cavity. Furthermore, the mounting unit, with its sliding part that can slide relative to the mounting base, not only ensures the stability of the silencing device installation but also greatly simplifies the installation process and improves installation efficiency. Simultaneously, due to the presence of the sliding part and the sliding drive part, the silencing device also has a certain degree of adjustability and adaptability, enabling it to better accommodate receiving cavities of different shapes and sizes.

[0025] Furthermore, the mounting base provides a stable sliding path for the sliding part through the groove, while the sliding part, through the combined action of the sliding rod and the foaming part, achieves a tight fit and fixation with the sidewall of the receiving cavity. In particular, the thermal expansion characteristics of the foaming part not only enhance the stability of the fixation but also help to further improve the sound absorption effect.

[0026] In addition, the silencing unit of the silencing device has a shell with a cavity and granular filler inside the cavity, as well as carefully designed sound transmission holes. When sound waves enter the cavity of the silencing unit through the sound transmission holes, the sound waves will interact with the filler. The granular filler can effectively absorb and scatter the sound waves, which not only helps to improve the silencing effect, but also ensures the stability and durability of the silencing unit.

[0027] Multiple sliding parts are provided and connected to a sliding drive unit. Only one sliding drive unit needs to be operated to achieve synchronous sliding of all sliding parts, which can improve the accuracy and efficiency of installation. At the same time, multiple sliding parts can contact and fix with the side wall of the receiving cavity at multiple points simultaneously, which can also increase the flexibility and stability of the silencer during installation.

[0028] The sliding drive is configured as a drive component that is rotatably arranged on the mounting base. It is connected to multiple sliding parts respectively, and the sliding direction is arranged to intersect the rotation center of the drive component. This design facilitates the arrangement of multiple sliding parts and makes more efficient use of the space on the mounting base.

[0029] Furthermore, the driving component adopts a drive disc that is rotatably mounted on the mounting base, and is connected to each sliding part through a guide structure. The guide structure includes a guide groove and a guide column, which is convenient for processing and assembly, and also helps to ensure the stability and synchronization of the silencer during installation.

[0030] By introducing a drive wheel into the sliding drive section and making the drive wheel mesh with the drive component, the efficiency and stability of the transmission are improved. Compared with the structure that does not have a drive wheel to directly drive the drive component, the structure using a drive wheel makes it easier to control the sliding speed of the sliding section.

[0031] Mounting the drive component on a bearing and providing a convenient grip helps improve transmission efficiency. On one hand, the use of bearings reduces friction and wear, allowing the drive component to rotate more smoothly; on the other hand, the grip makes it easier for users to operate the drive component, thus improving transmission efficiency and accuracy.

[0032] The drive unit includes a drive ring rotatably mounted on a mounting base, and multiple drive wheels meshing with the drive ring. Each drive wheel is connected to a sliding part, and the driving force is transmitted to the sliding part through the meshing connection. This design provides precise and reliable power transmission and control functions.

[0033] By setting mounting units at both ends along the length of the silencing unit, sufficient stability and robustness are ensured after installation. The sliding direction of the limiting sliding part is orthogonal to the length of the silencing unit, facilitating the arrangement of components and ensuring the correct position of the silencing unit after installation, thus enabling better acoustic performance of the silencing device within the mounting cavity.

[0034] Another objective of this invention is to provide a vehicle equipped with the noise reduction device described above.

[0035] The vehicle described in this invention, by applying the aforementioned muffler device, can significantly improve its acoustic performance, particularly in reducing noise and vibration. The muffler device can be easily installed within the rear side cavity and can be stably fixed within the mounting cavity, thereby enabling the muffler unit to exert excellent noise reduction performance. Attached Figure Description

[0036] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0037] Figure 1 This is an exemplary structural diagram of the silencing device described in Embodiment 1 of this utility model;

[0038] Figure 2 This is an exemplary structural diagram of the installation unit described in Embodiment 1 of this utility model;

[0039] Figure 3 for Figure 2 A schematic diagram of the structure in which the sliding part slides to its limit position away from the center of the mounting base;

[0040] Figure 4 This is a schematic diagram illustrating a sliding groove structure of the mounting base described in Embodiment 1 of this utility model;

[0041] Figure 5 This is an exemplary cross-sectional view of the installation unit described in Embodiment 1 of this utility model;

[0042] Figure 6 This is an exemplary structural diagram of the silencing device described in Embodiment 2 of this utility model;

[0043] Figure 7 For along Figure 6 Sectional view of line AA in the middle;

[0044] Figure 8 This is an exemplary structural diagram of the silencing device described in Embodiment 1 of this utility model under application conditions.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Muffler unit; 2. Mounting unit; 3. Mounting cavity; 4. Rear side panel outer sheet metal; 5. Wheel arch outer sheet metal; 6. Wheel arch inner sheet metal;

[0047] 101. Shell; 102. Filler;

[0048] 1011. Sound transmission hole;

[0049] 201. Mounting base; 202. Sliding part; 203. Sliding drive part; 204. Bearing; 205. Connecting part; 206. Snap ring;

[0050] 2011, Slide groove; 2012, Mounting plate; 2013, First protruding ring; 2014, Second protruding ring;

[0051] 2021, Sliding rod; 2022, Foaming section; 20211, Guide post;

[0052] 2031, Drive component; 2032, Drive wheel; 20311, Guide groove; 20312, Grip part; 20313, Drive ring. Detailed Implementation

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0054] In the description of this utility model, it should be noted that the terms "inner" and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0056] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] Example 1

[0058] With the development of hybrid vehicles, a high-voltage charging port needs to be installed in the rear side panel, which means an AC / DC charging socket assembly for high-voltage charging is required. Because the AC / DC charging socket assembly for high-voltage charging requires more surrounding space, the cavity in the rear side panel becomes smaller, making it impossible to place cotton padding inside the cavity, thus causing sound leakage.

[0059] In addition, because the charging harness that enables high-voltage charging is thicker, it exerts a greater force on the AC / DC charging socket assembly. As a result, the outer sheet metal of the rear wheel arch and the outer sheet metal of the rear side panel are usually pinched together at the charging port to avoid each other. This also results in a smaller rear side panel cavity and an irregular shape of the rear side panel cavity, which is also the reason why it is impossible to arrange the white cotton blocks neatly.

[0060] Because it is impossible to arrange the white cotton blocks neatly, there are weak sound insulation paths in the rear side cavity area, which can easily cause tire noise, chassis wind noise and other noises to leak into the car from the weak points, affecting the driving and riding experience.

[0061] Therefore, this embodiment relates to a noise reduction device that can be installed into a receiving cavity, such as the aforementioned rear perimeter cavity, and has a certain degree of adjustability and adaptability, enabling it to be better installed in receiving cavities of different shapes and sizes.

[0062] Based on the above design concept, an exemplary structure of the silencing device in this embodiment is as follows: Figures 1 to 5 As shown, its structural diagram in the application state is as follows: Figure 8 As shown. In terms of overall structure, the silencing device in this embodiment mainly includes a silencing unit 1 and a mounting unit 2 disposed on the silencing unit 1.

[0063] The mounting unit 2 includes a mounting base 201 connected to the silencing unit 1, a sliding part 202 slidably disposed on the mounting base 201, and a sliding drive part 203 pulsatorically connected to the sliding part 202. When the sliding drive part 203 drives the sliding part 202, the sliding part 202 can move from a position close to the silencing unit 1 to a position away from the silencing unit 1, and can abut against the side wall of the mounting cavity 3, thereby fixing the silencing unit 1 in the mounting cavity 3.

[0064] The silencing device in this embodiment mainly includes two parts: a silencing unit 1 and a mounting unit 2. The silencing unit 1 is the main functional part of the structure and is used to achieve the silencing effect, while the mounting unit 2 is to ensure that the silencing unit 1 can be installed in the mounting cavity 3, mainly to facilitate the installation of the silencing unit 1.

[0065] The mounting unit 2 mainly includes three parts: mounting base 201, sliding part 202, and sliding drive part 203. The mounting base 201 is the basic part of the mounting unit 2, which is directly connected to the noise reduction unit 1 and can provide a stable support platform for the subsequent sliding part 202 and sliding drive part 203.

[0066] The sliding part 202 is designed to slide on the mounting base 201. Its movement trajectory starts from a position close to the silencing unit 1 and slides all the way to a position away from the silencing unit 1. Alternatively, it can be said that the sliding part 202 can move from a position close to the mounting base 201 to a position away from the mounting base 201. This movement characteristic of the sliding part 202 can lay the foundation for its subsequent fixing function.

[0067] The sliding drive unit 203 is a key transmission device, which is connected to the sliding part 202. Its function is to provide power and drive the sliding part 202 to slide along a predetermined trajectory. Through the operation of the sliding drive unit 203, the sliding part 202 can accurately reach the designated position.

[0068] When the silencer needs to be installed in the mounting cavity 3, a driving force is first applied to the sliding drive 203, which drives the sliding part 202 to start moving. Specifically, the sliding part 202 starts from an initial position close to the silencer unit 1 and gradually slides outward until it can contact the side wall of the mounting cavity 3. Once the sliding part 202 abuts against the side wall of the mounting cavity 3, the silencer unit 1 can be firmly fixed in the mounting cavity 3 due to the combined action of the sliding part 202 and the mounting base 201.

[0069] The silencing device in this embodiment, through the installation unit 2, whose sliding part 202 can slide relative to the mounting base 201, not only ensures the stability of the silencing device installation, but also greatly simplifies the installation process and improves installation efficiency. At the same time, due to the presence of the sliding part 202 and the sliding drive part 203, the silencing device also has a certain degree of adjustability and adaptability, and can be better installed in the mounting cavity 3 of different shapes and sizes.

[0070] As a preferred implementation method, such as Figure 4 As shown, the mounting base 201 is provided with a groove 2011, and the sliding part 202 includes a sliding rod 2021 embedded in the groove 2011 and a foaming part 2022 provided on the sliding rod 2021. The sliding part 202 abuts against the side wall of the mounting cavity 3 through the foaming part 2022, and the foaming part 2022 can expand after heating.

[0071] Mounting base 201 serves as the fixed foundation for the entire mounting unit 2. A groove 2011 is designed on mounting base 201. The function of this groove 2011 is to provide a precise and stable sliding path for sliding part 202. The shape, size and position of groove 2011 are carefully designed to ensure that sliding part 202 can slide smoothly and easily within it, while ensuring the accuracy and stability of sliding.

[0072] Reference Figure 4 As shown in this embodiment, the mounting base 201 includes six mounting rods, each with a groove 2011 formed therein, and the sliding part 202 corresponds one-to-one with the groove 2011. The six mounting rods are located on the same plane, and the centers of the six mounting rods intersect at the same center point. The ends of the six mounting rods near this center point are fixed together by a connecting block.

[0073] It should be understood that the number of mounting rods can of course be set to other numbers, and the shape of the mounting base 201 can also be designed to be other shapes, as long as it can form a groove 2011 to facilitate the sliding of the sliding part 202.

[0074] The sliding rod 2021 is the main body of the sliding part 202. It is fitted into the groove 2011 of the mounting base 201, and the shape and size of the sliding rod 2021 match the groove 2011 to ensure that it can slide smoothly in the groove 2011. One end of the sliding rod 2021 is connected to the sliding drive part 203, and the other end is connected to the foaming part 2022. The sliding rod 2021 and the foaming part 2022 together constitute a complete sliding part 202.

[0075] The foaming portion 2022 is a special part of the sliding portion 202. It is located at the end of the sliding rod 2021 and is used to directly contact the side wall of the mounting cavity 3. In a preferred embodiment, the foaming portion 2022 is designed to be arc-shaped and is connected to the sliding rod 2021, for example, by adhesive bonding.

[0076] The foaming part 2022 is specifically made of existing foaming material, which can expand when heated. This expansion characteristic allows the foaming part 2022 to better fill the gap between the mounting cavity 3 and the sound-absorbing unit 1 after heating, and at the same time, it can be stably and reliably bonded to the side wall of the mounting cavity 3, thereby further enhancing the stability of the fixation.

[0077] When the sliding part 202 is driven by the sliding drive part 203 to slide to the position where it contacts the side wall of the mounting cavity 3, the foaming part 2022 will fit tightly against the side wall. At this time, if the foaming part 2022 is heated by a certain heating method, the foaming part 2022 will begin to expand. This expansion can not only further enhance the fit between the foaming part 2022 and the side wall of the mounting cavity 3, but also reduce the sound propagation path by filling the tiny gaps, thereby improving the sound absorption effect.

[0078] In a preferred embodiment, the noise reduction unit 1 includes a housing 101 with a cavity and a granular filler 102 filled in the cavity. The side wall of the housing 101 is provided with a plurality of sound-permeable holes 1011, and the diameter of the sound-permeable holes 1011 is smaller than the particle size of the filler 102.

[0079] In this exemplary structure, the silencing unit 1 mainly consists of a housing 101 with a cavity and granular filler 102 filling the cavity. The housing 101 is the main structure of the silencing unit 1, which forms a closed cavity. The material of the housing 101 is usually selected from materials with good acoustic properties and structural strength, such as metal, plastic or composite materials, and preferably high-temperature resistant plastic.

[0080] Particulate fillers 102 are filled into the cavity of the housing 101. These fillers can be particles of various shapes and sizes, such as spheres, cylinders, and flakes. The choice of material for the fillers 102 is also important. Materials with high density, high sound absorption coefficient, and good stability are usually chosen, such as sponge, rubber, polyurethane foam, glass wool, and rock wool. The purpose of these fillers 102 is to reduce sound propagation by absorbing, scattering, and reflecting sound waves.

[0081] In a preferred embodiment, the granular filler 102 includes sponge particles and rubber particles, which can be crushed and mixed in a specific ratio using existing machinery. Preferably, the ratio of sponge particle size to rubber particle size is greater than 2:1, and the ratio of sponge particle to rubber particle filling amount is also greater than 2:1. This facilitates resonance and provides excellent sound absorption.

[0082] When the above-mentioned noise reduction device is applied to the rear side cavity, it can consume the noise energy transmitted into the cavity to the greatest extent, improve the sound absorption performance of the rear side cavity, and reduce the NVH (Noise, Vibration, Harshness) performance loss caused by space constraints, effectively ensuring the competitiveness of vehicle performance.

[0083] Multiple sound-permeable holes 1011 are designed on the side wall of the housing 101. The function of these sound-permeable holes 1011 is to allow sound waves to enter the cavity of the silencing unit 1 and interact with the filler 102. The diameter of the sound-permeable holes 1011 is designed to be smaller than the particle size of the filler 102, which means that the filler 102 itself will not fall out of the cavity through the sound-permeable holes 1011. This design ensures the stability and durability of the silencing unit 1.

[0084] When sound waves enter the cavity of the anechoic unit 1 through the sound-permeable hole 1011, they interact with the filler 102. The granular structure and material properties of the filler 102 cause the sound waves to be absorbed, scattered, and reflected during propagation. These interactions reduce the energy of the sound waves, thereby reducing the intensity of sound propagation. The design of the sound-permeable hole 1011 also helps to ensure that sound waves can smoothly enter the cavity; it can be designed in any shape, such as circular, square, or triangular, to facilitate the full interaction between the sound waves and the filler 102.

[0085] In a preferred embodiment, there are multiple sliding parts 202, and the multiple sliding parts 202 are respectively connected to the sliding drive part 203. The multiple sliding parts 202 are driven by the sliding drive part 203 and can slide simultaneously relative to the mounting base 201.

[0086] As in this embodiment, refer to Figure 2 and Figure 3 As shown, there are six sliding parts 202. It should be understood that the number of sliding parts 202 can also be set to other numbers, such as two, three, four, etc.

[0087] Here, the arrangement of multiple sliding parts 202 means that during installation, the silencer can simultaneously contact and be fixed to the side wall of the mounting cavity 3 at multiple points. This multi-point fixing method is more stable than single-point fixing and can reduce loosening or displacement caused by vibration or external forces.

[0088] Each sliding part 202 is connected to the sliding drive part 203, which allows the sliding drive part 203 to synchronously control the movement of all sliding parts 202. This design simplifies the installation process because only one sliding drive part 203 needs to be operated to achieve synchronous sliding of all sliding parts 202, thereby improving the accuracy and efficiency of installation.

[0089] Multiple sliding parts 202 can slide simultaneously relative to the mounting base 201, allowing the silencer to reach the predetermined fixed position more quickly during installation. Furthermore, since all sliding parts 202 slide synchronously, their contact force with the sidewalls of the mounting cavity 3 is uniform, which helps reduce installation problems caused by uneven force distribution.

[0090] As a preferred implementation method, such as Figure 4 and Figure 5 As shown, the sliding drive unit 203 includes a drive member 2031 rotatably mounted on the mounting base 201. The sliding drive unit 203 is connected to a plurality of sliding parts 202 respectively through the drive member 2031, and the sliding direction of the plurality of sliding parts 202 is arranged intersecting the rotation center of the drive member 2031.

[0091] The drive element 2031 is rotatably mounted on the mounting base 201, meaning it can rotate on a fixed axis. The sliding drive unit 203 is connected to multiple sliding parts 202 via the drive element 2031. This connection can be achieved in various ways, such as by chain, gear, or belt. However, this connection method must ensure that when the drive element 2031 rotates, it can synchronously and smoothly drive all sliding parts 202 to slide.

[0092] The sliding directions of multiple sliding parts 202 are all arranged intersecting the rotation center of the drive member 2031. For example, the movement direction of the sliding part 202 is orthogonal to the rotation center of the drive member 2031. This arrangement helps to ensure that all sliding parts 202 remain synchronized and coordinated during the sliding process. It also facilitates the arrangement of multiple sliding parts 202, allowing the sliding parts 202 to make more effective use of the space on the mounting base 201.

[0093] Continue to refer to Figures 3 to 5 As shown, in a preferred embodiment, the drive member 2031 includes a drive disk rotatably disposed on the mounting base 201. The drive disk and each sliding part 202 are connected by a guide structure. Each guide structure includes a guide groove 20311 disposed on the drive disk and a guide post 20211 disposed on the sliding part 202. The guide post 20211 is inserted into the guide groove 20311.

[0094] The driving component 2031 is a circular driving disk rotatably mounted on the mounting base 201, which can rotate freely on the mounting base 201. The driving disk and each sliding part 202 are connected by a guide structure. This guide structure includes a guide groove 20311 on the driving disk and a guide post 20211 on the sliding part 202.

[0095] The guide groove 20311 is a specially shaped slot on the drive disk, whose shape and size match the guide post 20211 to ensure that the guide post 20211 can slide smoothly within it. The guide post 20211 is a protruding structure fixed on the sliding part 202, which is inserted into the guide groove 20311 to form a transmission connection with the drive disk.

[0096] When the drive disc rotates, the shape of the guide groove 20311 guides the guide post 20211 to slide along a predetermined path. Due to the tight fit between the guide groove 20311 and the guide post 20211, this sliding motion is smoothly and accurately transmitted to the sliding part 202, thereby driving the sliding part 202 to slide synchronously. This transmission connection method is not only simple and effective, but also has high transmission accuracy and stability.

[0097] Since all sliding parts 202 are connected to the drive disk via a guide structure, all sliding parts 202 will begin to slide simultaneously when the drive disk rotates. This synchronous sliding characteristic ensures the stability and consistency of the silencer during installation, helping to reduce installation problems caused by asynchrony.

[0098] In this embodiment, the multiple guide grooves 20311 have the same shape, and the multiple guide grooves 20311 are centered on the rotation center of the drive member 2031, so that each sliding part 202 can slide simultaneously and with the same sliding stroke. It should be understood that, according to actual needs, the bending shape of one, two or even more guide grooves 20311 can be changed, thereby adjusting the sliding stroke of the sliding part 202 corresponding to each guide groove 20311 to achieve matching with the surrounding components.

[0099] To ensure the stability of each sliding part 202 after sliding out, in an exemplary embodiment, the circumferential direction of the guide post can be set as a gear, and a rack can be set on the inner wall of the guide groove 20311. The gear and rack are connected by meshing, and by adjusting the shape of the teeth on the gear and rack, the sliding part 202 can only move from the position close to the muffler unit 1 to the position away from the muffler unit 1. This prevents the sliding part 202 from sliding in the opposite direction after it abuts the side wall of the mounting cavity 3, thereby fixing the muffler unit 1 in the mounting cavity 3.

[0100] In addition, the fitting accuracy between the sliding part 202 and the sliding groove 2011 can be increased, thereby increasing the friction between the sliding part 202 and the sliding groove 2011, making it less likely for the sliding part 202 to return when it slides to the maximum position away from the silencing unit 1. Alternatively, other locking structures can be provided on the sliding part 202 and the sliding groove 2011 to prevent the sliding part 202 from sliding in the opposite direction.

[0101] For example, in one exemplary embodiment, an opening is provided on the sliding part 202 and the sliding groove 2011, which runs through both. When the sliding part 202 slides to the maximum position away from the silencing unit 1, the sliding part 202 and the sliding groove 2011 are locked by a connector such as a screw inserted in the opening. In addition, other existing locking structures can be provided to prevent the sliding part 202 from sliding in the opposite direction when it slides to the set position.

[0102] In a preferred embodiment, the sliding drive unit 203 further includes a drive wheel 2032 rotatably mounted on the mounting base 201, and the drive wheel 2032 and the drive member 2031 are meshed together. This meshing can be the meshing between gears, the engagement of a sprocket and a chain, etc. This connection needs to ensure that when the drive wheel 2032 rotates, it can smoothly and effectively drive the drive member 2031 to rotate.

[0103] The drive wheel 2032 is rotatably mounted on the mounting base 201, and its engagement with the drive member 2031 (i.e., the previously mentioned drive disc) is key to achieving transmission. When the drive wheel 2032 is driven to rotate by an external power source (such as a motor or the operator's rotational driving force), it transmits the rotational motion to the drive member 2031 through the engagement connection. The drive member 2031 then achieves a transmission connection with each sliding part 202 through a guide structure, driving the sliding parts 202 to slide. This series of transmission paths ensures that the energy transfer from the drive wheel 2032 to the sliding parts 202 is efficient and stable.

[0104] Due to the meshing connection between the drive wheel 2032 and the drive member 2031, and the guiding structure between the drive member 2031 and the sliding part 202, the entire sliding drive part 203 can ensure the synchronicity and stability of all sliding parts 202 during the sliding process. This design helps to reduce installation problems caused by asynchrony or instability and is conducive to improving the overall performance of the silencing device.

[0105] like Figure 5 As shown, in a preferred embodiment, the drive member 2031 is rotatably mounted on the mounting base 201 via the bearing 204. The side of the drive member 2031 facing away from the mounting base 201 is provided with a gripping part 20312, and the gripping part 20312 is arranged close to the bearing 204.

[0106] For example Figure 5In the structure shown, the drive disk has a mounting groove for mounting the bearing 204 on the side facing the mounting base 201. The drive component 2031 is rotatably mounted on the mounting base 201 through the bearing 204 in the mounting groove. The bearing 204 is interference-fitted to both the drive disk and the mounting base 201.

[0107] A through hole is provided on the connecting block at the center of the mounting base 201, so that an internal thread can be provided on the inner ring of the bearing 204 or an internal threaded connecting sleeve can be installed with an interference fit. The connecting piece 205 is screwed into the internal thread or the connecting sleeve by means of a bolt. Then, through the interference fit between the drive disc and the bearing 204, the drive disc can be rotated relative to the mounting base 201 via the bearing 204.

[0108] Alternatively, for example, if the inner ring of bearing 204 does not have an internal thread or a connecting sleeve, the connecting part 205 can be a connecting rod with a slot on it. The bearing 204 can be securely installed on the mounting base 201 by using a snap ring 206 to install it in the slot.

[0109] Bearing 204 is a component that supports rotating mechanical parts and reduces friction and wear during their movement. Mounting the drive component 2031 onto the mounting base 201 via bearing 204 ensures smooth and free rotation of the drive component 2031 on the mounting base 201, while reducing friction and wear and improving transmission efficiency and stability. It should be understood that it is also feasible to omit bearing 204.

[0110] The grip portion 20312 provided on the side of the drive component 2031 facing away from the mounting base 201 is a structure that facilitates the user or operator to grip and operate the drive component 2031, ensuring that the user can operate the drive component 2031 easily and comfortably.

[0111] In this embodiment, the grip portion 20312 is specifically a protrusion formed on the drive member 2031. The protrusion is located on the side of the drive member 2031 facing away from the mounting base 201 and protrudes toward the side away from the mounting base 201, thereby facilitating the operator's grip and also facilitating the setting of the mounting groove for the bearing 204.

[0112] It should be understood that a through hole may also be provided on the grip portion 20312, so that the connector 205 can pass through the through hole on the grip portion 20312. In a preferred embodiment, for example... Figure 5 As shown, the connector 205 can pass upward through the grip portion 20312, and a portion of the connector 205 extends above the grip portion 20312, which also facilitates gripping.

[0113] It should also be noted that the grip 20312 is positioned close to the bearing 204. This positional relationship helps ensure that the user can directly and effectively apply force when operating the drive component 2031, thereby driving the drive component 2031 to rotate. At the same time, because the grip 20312 is close to the bearing 204, it can also support and stabilize the drive component 2031 to a certain extent, reducing shaking or displacement caused by improper operation.

[0114] In a preferred embodiment, the silencing unit 1 is elongated, with mounting units 2 at both ends of the length direction of the silencing unit 1, and the sliding direction of the sliding part 202 is orthogonal to the length direction of the silencing unit 1.

[0115] The silencing unit 1 and the mounting base 201 of the mounting unit 2 are fixedly connected together. For example, in one exemplary embodiment, the center of the mounting base 201 and the rotation center of the drive member 201 are both along the axial center of the silencing unit 1. The silencing unit 1 and the mounting base 201 are fixedly connected together, for example, by snap-fit, adhesive, screw, or other means.

[0116] The muffler unit 1 is configured as a long strip, meaning it is relatively long in length but relatively small in width and height. This shape is particularly suitable for installation in the rear side cavity of a vehicle and helps to enhance its muffler effect. As in this embodiment, when the muffler is installed in the rear side cavity, the length of the muffler unit 1 is along the front-rear direction of the vehicle.

[0117] By providing mounting units 2 at both ends of the length of the silencing unit 1, sufficient stability and firmness of the silencing unit 1 can be ensured after installation. The sliding direction of the sliding part 202 is orthogonal to the length direction of the silencing unit 1, which helps to ensure the position of the silencing unit 1 after installation, so that the silencing device can achieve better acoustic effect in the mounting cavity.

[0118] By providing mounting units 2 at both ends of the silencing unit 1 and allowing the sliding part 202 to slide orthogonally to the length direction, this design improves the convenience of installation and adjustment. Users can easily fix the silencing unit 1 to the desired position by adjusting the sliding part 202 to achieve its fit with the inner wall of the mounting cavity 3.

[0119] Example 2

[0120] This embodiment relates to a noise reduction device, referring to... Figure 6 and Figure 7 As shown, it has a roughly the same structure as the silencing device in Embodiment 1, the difference being the structure of the mounting base 201 and the sliding drive part 203.

[0121] In this embodiment, the mounting base 201 includes a mounting plate 2012, and a first protruding ring 2013 and a second protruding ring 2014 disposed on one side of the mounting plate 2012. The first protruding ring 2013 and the second protruding ring 2014 are arranged concentrically.

[0122] The sliding drive unit 203 includes a drive member 2031 rotatably mounted on the mounting base 201. However, the drive member 2031 includes a drive ring 20313 rotatably mounted on the mounting base 201 and a plurality of drive wheels 2032 meshing with the drive ring 20313. The plurality of drive wheels 2032 correspond one-to-one with the plurality of sliding parts 202, and the corresponding drive wheel 2032 meshes with the sliding part 202.

[0123] Among them, the drive ring 20313 is one of the core components of the drive unit 2031, and it is rotatably mounted on the mounting plate 2012. For example... Figure 6 As shown, an annular cavity is formed between the first convex ring 2013 and the second convex ring 2014. The drive ring 20313 is installed in this cavity, and the outer wall of the drive ring 20313 abuts against the inner wall of the first convex ring 2013, providing stable support for the drive ring 20313. A gap is provided between the inner wall of the drive ring 20313 and the outer wall of the second convex ring 2014, allowing the drive ring 20313 to rotate freely around its center. To prevent the drive ring 20313 from detaching from the annular cavity, a retaining ring or screw can be provided on the inner wall of the cavity.

[0124] Multiple drive wheels 2032 are meshed with the drive ring 20313. These drive wheels 2032 are all located in the annular cavity and are evenly distributed on the inner circumference of the drive ring 20313, forming a meshing relationship with the drive ring 20313. Each drive wheel 2032 is matched with a specific tooth or groove shape on the drive ring 20313 to ensure that they can transmit power smoothly and efficiently.

[0125] Multiple drive wheels 2032 correspond one-to-one with multiple sliding parts 202. This means that each sliding part 202 has a drive wheel 2032 connected to it, which ensures that each sliding part 202 can be independently and accurately controlled by the driving force.

[0126] When the drive ring 20313 rotates on the mounting base 201, it drives multiple drive wheels 2032 meshing with it to rotate together. Since each drive wheel 2032 is connected to a sliding part 202, the rotating drive wheel 2032 drives the corresponding sliding part 202 to move. Thus, by controlling the rotation of the drive ring 20313, the movement state of multiple sliding parts 202 can be precisely controlled. In addition, the sliding part 202 can also be driven by rotating any one of the drive wheels 2032.

[0127] Example 3

[0128] This embodiment relates to a vehicle, wherein a muffler is provided in the rear side cavity as in Embodiment 1 or Embodiment 2.

[0129] The vehicle in this embodiment, by applying the above-described muffler, can significantly improve its acoustic performance, particularly in reducing noise and vibration. The muffler is easy to install in the rear side cavity and can be stably fixed in the mounting cavity, thereby enabling the muffler unit 1 to perform excellent muffler performance.

[0130] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A muffling device for being installed into an installation cavity (3), characterized in that: comprising a muffling unit (1), and an installation unit (2) arranged on the muffling unit (1); the installation unit (2) comprises a mounting seat (201) connected with the muffling unit (1), a sliding part (202) slidingly arranged on the mounting seat (201), and a sliding driving part (203) drivingly connected with the sliding part (202); the sliding part (202) is driven by the sliding driving part (203) to move from a position close to the muffling unit (1) to a position away from the muffling unit (1), and abuts against a side wall of the installation cavity (3) to fix the muffling unit (1) in the installation cavity (3).

2. The muffling device according to claim 1, characterized in that: the mounting seat (201) is provided with a sliding groove (2011), the sliding part (202) comprises a sliding rod (2021) embedded in the sliding groove (2011), and a foaming part (2022) arranged on the sliding rod (2021); the sliding part (202) abuts against the side wall of the installation cavity (3) through the foaming part (2022), and the foaming part (2022) can expand after being heated.

3. The muffling device according to claim 1, characterized in that: the muffling unit (1) comprises a shell (101) with a cavity, and a granular filler (102) filled in the cavity; the side wall of the shell (101) is provided with a plurality of sound transmission holes (1011), and the diameter of the sound transmission holes (1011) is smaller than the particle size of the filler (102).

4. The muffling device according to claim 1, characterized in that: the sliding part (202) is a plurality of, and the plurality of sliding parts (202) are respectively drivingly connected with the sliding driving part (203); the plurality of sliding parts (202) are driven by the sliding driving part (203) to slide simultaneously relative to the mounting seat (201).

5. The muffling device according to claim 4, characterized in that: the sliding driving part (203) comprises a driving member (2031) rotatingly arranged on the mounting seat (201), the sliding driving part (203) is drivingly connected with the plurality of sliding parts (202) through the driving member (2031), and the sliding directions of the plurality of sliding parts (202) are all arranged intersecting with the rotation center of the driving member (2031).

6. The muffling device according to claim 5, characterized in that: the driving member (2031) comprises a driving disc rotatingly arranged on the mounting seat (201), the driving disc and each sliding part (202) are drivingly connected through a guide structure, each guide structure comprises a guide groove (20311) arranged on the driving disc, and a guide column (20211) arranged on the sliding part (202), and the guide column (20211) is inserted into the guide groove (20311). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The muffling device according to claim 5, characterized in that: the sliding driving part (203) further comprises a driving wheel (2032) rotatably arranged on the mounting base (201), and the driving wheel (2032) and the driving member (2031) are in meshing connection; and / or, the driving member (2031) is rotatably arranged on the mounting base (201) through a bearing (204), and a holding part (20312) is arranged on the side of the driving member (2031) away from the mounting base (201), and the holding part (20312) is arranged close to the bearing (204).

8. The muffling device according to claim 5, characterized in that: the driving member (2031) comprises a driving ring (20313) rotatably arranged on the mounting base (201), and a plurality of driving wheels (2032) in meshing connection with the driving ring (20313); a plurality of the driving wheels (2032) correspond to a plurality of the sliding parts (202) one by one, and the corresponding driving wheel (2032) and the sliding part (202) are in meshing connection.

9. The muffling device according to any one of claims 1-8, characterized in that: the muffling unit (1) is in a strip shape, both ends of the length direction of the muffling unit (1) are provided with the mounting unit (2), and the sliding direction of the sliding part (202) is orthogonal to the length direction of the muffling unit (1).

10. A vehicle, characterized in that: the vehicle is provided with the muffling device according to any one of claims 1-9.

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