Modularized passive vibration isolation platform
Through the design of the modular passive vibration isolation platform, the phonon crystal module splicing and mass setting are used to solve the problems of low stiffness and narrow vibration isolation frequency of the rubber vibration isolation device, and wide band vibration isolation is achieved to protect electrical parts from damage.
Patent Information
- Application Number
- CN202422399485.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The rubber isolators of existing automotive electrical parts have low stiffness, low vibration isolation frequency, and narrow vibration isolation frequency of spring isolators, making it difficult to effectively protect electrical parts under complex road conditions.
The modular passive vibration isolation platform is adopted, and the phonon crystal module is spliced through multi-layer layered phonon crystal modules, including the first phonon crystal module and the second phonon crystal module. The first module has no mass blocks, and the second module has mass blocks inside it. Combined with rubber material, it is designed into a modular structure to improve stiffness and vibration isolation frequency band.
Under the premise of having better structural stiffness, a wide vibration isolation frequency band is realized, which enhances the protection of electrical parts and adapts to complex vibration conditions.
Smart Images
Figure CN223120474U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration isolation devices, and more specifically, to a modular passive vibration isolation platform. Background Art
[0002] With the wide application of electrification in the automotive field, the anti-vibration and anti-shock characteristics of electrical components have become increasingly important. Taking the electric drive axle as an example, in some application scenarios, the electric drive axle will face strong impact and vibration loads. For example, the motor controller of the electric drive axle will face an acceleration impact of 300G and complex vibration conditions caused by road bumps. Therefore, in order to avoid the risk of damage caused by impact and vibration, it is necessary to add a vibration isolation device to the electrical components.
[0003] The current common vibration reduction measures for automotive electrical components are to add rubber vibration isolators or spring vibration isolators. Among them, the rubber vibration isolator has a low structural stiffness and a low vibration isolation frequency. When facing large impact and vibration loads, due to its low stiffness, it is prone to large swings and then break. The vibration isolation frequency of the spring vibration isolator is relatively narrow and the direction is single, and it cannot well adapt to the complex road conditions faced by automobiles.
[0004] Therefore, how to have a relatively wide vibration isolation frequency band on the premise of having better structural stiffness is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model
[0005] In view of this, the purpose of the utility model is to provide a modular passive vibration isolation platform to have a relatively wide vibration isolation frequency band on the premise of having better structural stiffness.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] A modular passive vibration isolation platform includes at least one layer of vibration isolation platform layer, and each layer of the vibration isolation platform layer is spliced by a plurality of phononic crystal modules;
[0008] The phononic crystal modules include at least two types, and two of them are the first phononic crystal module and the second phononic crystal module respectively;
[0009] The first phononic crystal module includes a first phononic crystal body, the first phononic crystal body has a first module cavity, the second phononic crystal module includes a second phononic crystal body and a mass block, the second phononic crystal body has a second module cavity, and the mass block is arranged in the second module cavity.
[0010] Optionally, in the above modular passive vibration isolation platform, the first phononic crystal body includes at least two first sub-modules, the first sub-modules have first sub-module cavities, and each of the first sub-modules is assembled to form the first phononic crystal body, and each of the first sub-module cavities is assembled to form the first module cavity; and / or,
[0011] The second phononic crystal body includes at least two second sub-modules, the second sub-modules have second sub-module cavities, and each of the second sub-modules is assembled to form the first phononic crystal body, and each of the second sub-module cavities is assembled to form the second module cavity.
[0012] Optionally, in the above modular passive vibration isolation platform, the structures of each of the first sub-modules are the same; and / or,
[0013] The structures of each of the second sub-modules are the same.
[0014] Optionally, in the above modular passive vibration isolation platform, there are two first sub-modules, and the first sub-module includes a first sub-module plate body and a first sub-module spacer disposed on the first side of the first sub-module plate body. The opening side of the first sub-module cavity is located on the second side of the first sub-module plate body, and the docking surface of the two first sub-modules is the surface where the second side of the first sub-module plate body is located; and / or,
[0015] There are two second sub-modules, and the second sub-module includes a second sub-module plate body and a second sub-module spacer disposed on the first side of the second sub-module plate body. The opening side of the second sub-module cavity is located on the second side of the second sub-module plate body, and the docking surface of the two second sub-modules is the surface where the second side of the second sub-module plate body is located.
[0016] Optionally, in the above modular passive vibration isolation platform, the first end surface of the first sub-module spacer is coplanar with the first end surface of the first sub-module plate body, the second end surface of the first sub-module spacer is coplanar with the second end surface of the first sub-module plate body, and the width of the first sub-module spacer is less than the width of the first sub-module plate body; and / or,
[0017] The first end surface of the second sub-module spacer is coplanar with the first end surface of the second sub-module plate body, the second end surface of the second sub-module spacer is coplanar with the second end surface of the second sub-module plate body, and the width of the second sub-module spacer is less than the width of the second sub-module plate body.
[0018] Optionally, in the above modular passive vibration isolation platform, the first sub-module cavity extends to the first sub-module spacer, and the second sub-module cavity extends to the second sub-module spacer.
[0019] Optionally, in the above modular passive vibration isolation platform, the structures of the first phononic crystal body and the second phononic crystal body are the same; and / or,
[0020] the materials of the first phononic crystal body and the second phononic crystal body are rubber; and / or,
[0021] the material of the mass block is metal, glass, rubber or plastic.
[0022] Optionally, in the above modular passive vibration isolation platform, each layer of the vibration isolation platform layer forms a platform layer group, and a first mounting table and a second mounting table are respectively arranged on both sides of the platform layer group. The first mounting table is used to connect to one of the protected device and the excitation source, and the second mounting table is used to connect to the other of the protected device and the excitation source.
[0023] Optionally, in the above modular passive vibration isolation platform, each layer of the vibration isolation platform layer includes the first phononic crystal module and the second phononic crystal module; or,
[0024] the same layer of the vibration isolation platform layer only includes one of the first phononic crystal module and the second phononic crystal module, and the types of the phononic crystal modules of adjacent layers of the vibration isolation platform layer are different.
[0025] Optionally, in the above modular passive vibration isolation platform, each layer of the vibration isolation platform layer includes the first phononic crystal module and the second phononic crystal module, and the first phononic crystal module and the second phononic crystal module of the same layer of the vibration isolation platform layer are arranged at intervals according to a preset rule, and the types of the phononic crystal modules of adjacent layers of the vibration isolation platform layer are different or the same.
[0026] The modular passive vibration isolation platform provided by the present invention is composed of multiple layers of vibration isolation platform layers arranged in a stacked manner, and each layer of the vibration isolation platform layer is spliced by a plurality of phononic crystal modules. The phononic crystal modules of the modular passive vibration isolation platform include at least two types. There is no mass block in the first module cavity of the first phononic crystal module, and there is a mass block in the second module cavity of the second phononic crystal module. After the protected device is arranged on the modular passive vibration isolation platform, since the present invention includes multiple layers of vibration isolation platform layers arranged in a stacked manner, compared with being supported by a rubber isolator, the present invention has better structural stiffness and can provide reliable support for the protected device. The present invention adopts a modular design, and different modular passive vibration isolation platforms with different vibration isolation characteristics can be obtained by adjusting the installation positions and arrangement modes of the first phononic crystal module and the second phononic crystal module, so that a modular passive vibration isolation platform with appropriate vibration isolation characteristics can be selected according to the vibration isolation requirements. The present invention integrates the vibration isolation frequency band characteristics of phononic crystals and has a relatively wide vibration isolation frequency band. Description of the Drawings
[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 Structural schematic diagram of the modular passive vibration isolation platform disclosed in the embodiment of the present invention;
[0029] Figure 2 Structural schematic diagram of the modular passive vibration isolation platform disclosed in the embodiment of the present invention after removing the first mounting table and the second mounting table;
[0030] Figure 3 Exploded view of the modular passive vibration isolation platform disclosed in another embodiment of the present invention;
[0031] Figure 4 Exploded view of the first phononic crystal module disclosed in the embodiment of the present invention;
[0032] Figure 5 Exploded view of the second phononic crystal module disclosed in the embodiment of the present invention;
[0033] Figure 6 Bandgap distribution diagram of the modular passive vibration isolation platform disclosed in the embodiment of the present invention;
[0034] Figure 7 Arrangement diagram of the vibration isolation platform layer disclosed in the embodiment of the present invention;
[0035] Figure 8 Arrangement diagram of the vibration isolation platform layer disclosed in another embodiment of the present invention.
[0036] The meanings of the various reference numerals in the drawings are as follows:
[0037] 100 - First phononic crystal module; 110 - First sub-module; 111 - First sub-module plate body; 112 - First sub-module spacer; 113 - First sub-module cavity;
[0038] 200 - Second phononic crystal module; 210 - Second sub-module; 211 - Second sub-module plate body; 212 - Second sub-module spacer; 213 - Second sub-module cavity; 220 - Mass block;
[0039] 300 - First mounting table;
[0040] 400 - Second mounting table. Detailed implementation manners
[0041] The core of the present utility model lies in providing a modular passive vibration isolation platform, which has a relatively wide vibration isolation frequency band on the premise of having better structural stiffness.
[0042] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the content of the utility model described in the claims in any way. Moreover, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the utility model described in the claims. It should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings. Without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.
[0043] As Figures 1-3 shown, the embodiment of the present utility model discloses a modular passive vibration isolation platform, which includes at least one layer of vibration isolation platform layer. The number of layers of the vibration isolation platform layer should be selected according to the usage requirements, and specifically, the number of layers with better vibration isolation ability can be obtained through experiments or simulations. When there are multiple layers of vibration isolation platform layers, each layer of vibration isolation platform layer should be stacked. Those skilled in the art can understand that theoretically, the more layers of the vibration isolation platform layer, the better the vibration isolation ability, but the higher the weight, volume and cost. Those skilled in the art can select the number of layers of the vibration isolation platform layer according to the requirements.
[0044] Each layer of the vibration isolation platform layer is spliced by a plurality of phononic crystal modules. For the convenience of assembly, the external contour of each phononic crystal module can be designed to be the same and the volume is the same, that is, the phononic crystal module is the splicing unit of each layer of the vibration isolation platform layer.
[0045] Materials or structures with periodically distributed elastic constants and densities are called phononic crystals (Phononic Crystals). Phononic crystals are a new type of functional material formed by periodically arranging elastic solids in another solid or fluid medium. By analogy with photonic crystals, it is found that when elastic waves propagate in a periodic elastic composite medium, an elastic wave band gap similar to the photonic band gap will also be generated, thus the concept of phononic crystals is proposed.
[0046] There are at least two types of phononic crystal modules, and two of them are the first phononic crystal module 100 and the second phononic crystal module 200 respectively. It should be noted that the modular passive vibration isolation platform may only include the first phononic crystal module 100 and the second phononic crystal module 200, or may also have other types of phononic crystal modules in addition to the first phononic crystal module 100 and the second phononic crystal module 200.
[0047] The first phononic crystal module 100 includes a first phononic crystal body which has a first module cavity. The second phononic crystal module 200 includes a second phononic crystal body and a mass block 220. The second phononic crystal body has a second module cavity, and the mass block 220 is disposed in the second module cavity. The similarity between the first phononic crystal module 100 and the second phononic crystal module 200 is that both have module cavities, which can improve the deformation ability of the first phononic crystal module 100 and the second phononic crystal module 200 when subjected to impact and vibration loads. The difference between the first phononic crystal module 100 and the second phononic crystal module 200 is that one does not have a mass block 220, while the other has a mass block 220. The mass block can increase the mass of the second phononic crystal module 200, so that the second phononic crystal module 200 is more evenly stressed when subjected to external forces, thereby effectively controlling the amplitude of the protected device and reducing the impact of vibration on the protected device. Moreover, by adding the mass block 220, the stability of the modular passive vibration isolation platform can also be increased.
[0048] In order to improve the manufacturing efficiency, in this embodiment, the first phononic crystal body and the second phononic crystal body are designed to have the same structure. Therefore, in the production and manufacturing, even in the design stage, only one structure of the phononic crystal body needs to be designed, and the phononic crystal body of this structure is applied to both the first phononic crystal body and the second phononic crystal body at the same time. No mass block 220 is placed in the first module cavity of the first phononic crystal body to form the first phononic crystal module 100; a mass block 220 is placed in the second module cavity of the second phononic crystal body to form the second phononic crystal module 200.
[0049] In the embodiment of the present utility model, the main parts (the first phononic crystal body and the second phononic crystal body) of the first phononic crystal module 100 and the second phononic crystal module 200 are designed to have the same structure, so that when designing and processing the first phononic crystal module 100 and the second phononic crystal module 200, the same mold can be used for preparation, which improves the manufacturing efficiency and reduces the R & D cost.
[0050] It should be noted that, according to the requirements of the application scenario, the structures of the first phononic crystal body and the second phononic crystal body can also be designed differently.
[0051] A phononic crystal is an artificially manufactured structure or material, and its periodic structure or geometric properties can be designed to affect the propagation characteristics of mechanical waves. When designing and manufacturing a phononic crystal, people can isolate vibrations within a specific frequency range. The specific frequency range is also called a band gap, and the vibrations within the band gap will decay due to the influence of wave interference in the periodic structure.
[0052] Such as Figure 6As shown, the bandgap characteristics of the phononic crystal are calculated based on the Bloch principle. Only the first phononic crystal module 100 and the second phononic crystal module 200 are analyzed, and the results are as Figure 6 shown, where a is the bandgap characteristic of the second phononic crystal module 200, and b is the bandgap characteristic of the first phononic crystal module 100.
[0053] Figure 6 In [figure], the ordinate is the normalized frequency, which is the excitation frequency / 500 and belongs to a dimensionless unit. The abscissa is the direction, where RM outlined by the black wireframe refers to the vertical direction. The region filled with oblique straight lines represents that the corresponding frequency has vibration isolation effect in all directions, and the dotted line part refers to the vibration influence frequency.
[0054] The first phononic crystal module 100 does not have a dotted line below the normalized frequency of 0.07 in the vertical direction, indicating that it has vibration isolation effect in the vertical direction less than 35 Hz. The second phononic crystal module 200 does not have a dotted line between the normalized frequencies of 0.07 - 0.114 (see the region filled with oblique straight lines below a in Figure 6 ), indicating that it has vibration isolation effect in all directions from 35 to 57 Hz.
[0055] The first phononic crystal module 100 and the second phononic crystal module 200 have vibration isolation in all directions from 200 to 400 Hz (see the region filled with oblique straight lines above a and b in Figure 6 ). It can be seen that by reasonably arranging the first phononic crystal module 100 and the second phononic crystal module 200, vibration isolation with a wide frequency band can be achieved, that is, vibration isolation in the ranges of 0 - 57 Hz and 200 - 400 Hz can be achieved.
[0056] The modular passive vibration isolation platform provided by the present utility model is composed of multiple layers of vibration isolation platform layers arranged in a stacked manner, and each layer of vibration isolation platform layer is spliced by multiple phononic crystal modules. The phononic crystal modules of the modular passive vibration isolation platform include at least two types. No mass block 220 is provided in the first module cavity of the first phononic crystal module 100, and a mass block 220 is provided in the second module cavity of the second phononic crystal module 200. After the device to be protected is arranged on the modular passive vibration isolation platform, since the present utility model includes multiple layers of vibration isolation platform layers arranged in a stacked manner, compared with being supported by rubber vibration isolators, the present utility model has better structural stiffness and can provide reliable support for the device to be protected. The present utility model adopts a modular design, and different modular passive vibration isolation platforms with different vibration isolation characteristics can be obtained by adjusting the installation positions and arrangement modes of the first phononic crystal module 100 and the second phononic crystal module 200, so that a modular passive vibration isolation platform with appropriate vibration isolation characteristics can be selected according to the vibration isolation requirements. The present utility model integrates the vibration isolation frequency band characteristics of the phononic crystal and has a relatively wide vibration isolation frequency band.
[0057] The materials of the first phononic crystal body and the second phononic crystal body are rubber. The structural form of the modular passive vibration isolation platform disclosed in the embodiments of the present invention combines the vibration isolation frequency band characteristics of the phononic crystal and the vibration isolation characteristics of the rubber material, further broadening its vibration isolation frequency band. Different vibration isolation platforms with different vibration isolation characteristics can be obtained by adjusting the rubber material (Young's modulus), structural size parameters, and mass block materials. It should be noted that the materials of the first phononic crystal body and the second phononic crystal body can also be other elastic materials, such as silicone materials, etc.
[0058] The material of the mass block 220 can be metal, glass, rubber, or plastic. In addition, in order to ensure the concentration of the mass of the mass block 220, the mass block 220 can be designed as a solid structure; of course, those skilled in the art can also design the mass block 220 as a hollow structure according to needs. When the mass block 220 is designed as a hollow structure, particles of other materials can be filled in the hollow cavity of the mass block 220 to further improve the vibration isolation effect. The mass block 220 can be made of a single material or assembled from multiple materials. The mass block 220 can be adhesively bonded in the second module cavity.
[0059] As Figure 4 shown, the first phononic crystal body includes at least two first sub-modules 110. The first sub-module 110 has a first sub-module cavity 113. Each first sub-module 110 is assembled to form the first phononic crystal body, and each first sub-module cavity 113 is assembled to form a first module cavity. For the convenience of manufacturing, the shape structures of the first sub-modules 110 can be designed to be the same, that is, the first phononic crystal body can be assembled by multiple first sub-modules 110, and the contact surfaces of the first sub-modules 110 can be fixed by gluing.
[0060] As Figure 5 shown, the second phononic crystal body includes at least two second sub-modules 210. The second sub-module 210 has a second sub-module cavity 213. Each second sub-module 210 is assembled to form the first phononic crystal body, and each second sub-module cavity 213 is assembled to form a second module cavity. For the convenience of manufacturing, the shape structures of the second sub-modules 210 can be designed to be the same, that is, the second phononic crystal body can be assembled by multiple second sub-modules 210, and the contact surfaces of the second sub-modules 210 can be fixed by gluing. Correspondingly, adjacent two layers of the vibration isolation platform layer, as well as between the phononic crystal modules of the same layer of the vibration isolation platform layer, can also be fixed by gluing.
[0061] It should be noted that the structures of the first sub-modules 110 can also be designed to be different; similarly, the structures of the second sub-modules 210 can also be designed to be different. For the purpose of facilitating processing and manufacturing, the structures of the first sub-modules 110 and the second sub-modules 210 are preferably designed to be the same. However, considering the actual application scenarios, and when the actual structures of the first phononic crystal body and the second phononic crystal body are asymmetric structures, they can also be designed to be different, and the specific selection should be based on the actual scenarios.
[0062] Furthermore, as Figure 4 shown, there are two first sub-modules 110, and the first sub-module 110 includes a first sub-module plate body 111 and a first sub-module partition block 112 disposed on the first side of the first sub-module plate body 111. That is, in this embodiment, the first sub-module 110 can be understood as being composed of two structures (the first sub-module plate body 111 and the first sub-module partition block 112). Arranging the first sub-module partition block 112 on one side of the first sub-module plate body 111 can improve the strength of the first sub-module plate body 111, so that even if the first sub-module cavity 113 is provided, the first sub-module 110 can still have a certain static stiffness.
[0063] The first sub-module partition block 112 and the first sub-module plate body 111 can be designed as an integral structure. The opening side of the first sub-module cavity 113 is located on the second side of the first sub-module plate body 111, and the docking surface of the two first sub-modules 110 is the surface where the second side of the first sub-module plate body 111 is located. The first sub-module plate body 111 can penetrate the first sub-module plate body 111 from the second side of the first sub-module plate body 111 and extend to the first sub-module partition block 112.
[0064] As Figure 5 shown, there are two second sub-modules 210, and the second sub-module 210 includes a second sub-module plate body 211 and a second sub-module partition block 212 disposed on the first side of the second sub-module plate body 211. That is, in this embodiment, the second sub-module 210 can be understood as being composed of two structures (the second sub-module plate body 211 and the second sub-module partition block 212). Arranging the second sub-module partition block 212 on one side of the second sub-module plate body 211 can improve the strength of the second sub-module plate body 211, so that even if the second sub-module cavity 213 is provided, the second sub-module 210 can still have a certain static stiffness.
[0065] The second sub-module plate body 211 and the second sub-module partition block 212 can be designed as an integral structure. The opening side of the second sub-module cavity 213 is located on the second side of the second sub-module plate body 211, and the docking surface of the two second sub-modules 210 is the surface where the second side of the second sub-module plate body 211 is located. The second sub-module plate body 211 can penetrate the second sub-module plate body 211 from the second side of the second sub-module plate body 211 and extend to the second sub-module partition block 212.
[0066] In a specific embodiment of the present invention, the first end face of the first sub-module partition block 112 is coplanar with the first end face of the first sub-module plate body 111, the second end face of the first sub-module partition block 112 is coplanar with the second end face of the first sub-module plate body 111, and the width of the first sub-module partition block 112 is less than the width of the first sub-module plate body 111.
[0067] Both the first sub-module plate body 111 and the first sub-module partition block 112 can be rectangular block structures. Among them, along the direction from the first side face to the second side face of the first sub-module plate body 111, it is defined as the thickness direction of the first sub-module plate body 111 and the first sub-module partition block 112. The direction along the first end face to the second end face of the first sub-module plate body 111 is defined as the height direction of the first sub-module plate body 111 and the first sub-module partition block 112; a direction other than the thickness direction and the height direction is defined as the width direction.
[0068] In this embodiment, the first sub-module plate body 111 and the first sub-module partition block 112 are of the same height, and the ends are designed to be coplanar. The width of the first sub-module partition block 112 is less than the width of the first sub-module plate body 111. Specifically, the first sub-module partition block 112 can be arranged in the middle of the width direction of the first sub-module plate body 111. With such a setting, the cross-section of the first phononic crystal body and the second phononic crystal body perpendicular to the height direction is in a cross shape, and a hollow space 500 is formed in the middle of the crystal module group composed of any four adjacent phononic crystal modules on the same layer of the vibration isolation platform layer (as Figure 2 shown), and this hollow space 500 can further increase the deformation space of the vibration isolation platform layer and improve the vibration isolation ability.
[0069] Correspondingly, the first end face of the second sub-module partition block 212 is coplanar with the first end face of the second sub-module plate body 211, the second end face of the second sub-module partition block 212 is coplanar with the second end face of the second sub-module plate body 211, and the width of the second sub-module partition block 212 is less than the width of the second sub-module plate body 211.
[0070] Both the second sub-module plate body 211 and the second sub-module partition block 212 can be rectangular block structures. Among them, along the direction from the first side surface to the second side surface of the second sub-module plate body 211, it is defined as the thickness direction of the second sub-module plate body 211 and the second sub-module partition block 212. The direction along the first end surface to the second end surface of the second sub-module plate body 211 is defined as the height direction of the second sub-module plate body 211 and the second sub-module partition block 212; a direction other than the thickness direction and the height direction is defined as the width direction.
[0071] In this embodiment, the second sub-module plate body 211 and the second sub-module partition block 212 have the same height, and the end parts are designed to be coplanar. The width of the second sub-module partition block 212 is smaller than the width of the second sub-module plate body 211. Specifically, the second sub-module partition block 212 can be arranged in the middle of the second sub-module plate body 211 in the width direction. With such a setting, the cross-section of the first phononic crystal body and the second phononic crystal body perpendicular to the height direction is in a cross shape, and a hollow space is enclosed in the middle of a crystal module group composed of any four adjacent phononic crystal modules in the same layer of vibration isolation platform layer. This hollow space can further increase the deformation space of the vibration isolation platform layer and improve the vibration isolation ability.
[0072] Those skilled in the art can understand that by designing the structural dimensions of the first phononic crystal body and the second phononic crystal body to be the same, the above-mentioned hollow space 500 can be generated even when the first phononic crystal module 100 and the second phononic crystal module 200 are mixed in the same layer of vibration isolation platform layer. It should be noted that the width of the hollow space 500 is related to the width difference between the second sub-module partition block 212 and the second sub-module plate body 211. That is, when the second sub-module partition block 212 is arranged in the middle of the second sub-module plate body 211 in the width direction, the width of the hollow space 500 is the width difference between the second sub-module partition block 212 and the second sub-module plate body 211. Those skilled in the art can design the width difference between the sub-module partition block (the first sub-module partition block 112 and the second sub-module partition block 212) and the sub-module plate body (the first sub-module plate body 111 and the second sub-module plate body 211) according to requirements.
[0073] In order to facilitate the connection between the modular passive vibration isolation platform and the protected device and the excitation source, in this embodiment, each layer of vibration isolation platform layer forms a platform layer group, and a first installation platform 300 and a second installation platform 400 are respectively arranged on both sides of the platform layer group. The first installation platform 300 is used to connect to one of the protected device and the excitation source, and the second installation platform 400 is used to connect to the other of the protected device and the excitation source. For the convenience of installation, fixing interfaces can also be arranged on the first installation platform 300 and the second installation platform 400. The fixing interfaces can be fixing structures commonly used in the prior art, such as screws, screw sleeves, fastening holes, buckles, etc., any structure that can be conveniently connected to the protected device and the excitation source.
[0074] As shown in Figure 7 and Figure 8 each vibration isolation platform layer can include both the first phononic crystal module 100 and the second phononic crystal module 200 at the same time. The same layer of vibration isolation platform layer may also include only one of the first phononic crystal module 100 and the second phononic crystal module 200, and the types of phononic crystal modules in adjacent layers of vibration isolation platform layers are different. Specifically, how to arrange them can be selected by those skilled in the art according to the test results or simulation results.
[0075] As shown in Figure 7 and Figure 8 the first phononic crystal module 100 corresponds to the white dots in the figure, and the second phononic crystal module 200 corresponds to the black dots in the figure. Figure 7 and Figure 8 both show the arrangement of each phononic crystal module (the first phononic crystal module 100 and the second phononic crystal module 200) in one layer of the vibration isolation platform layer. Figure 7 shows a scheme in which the first phononic crystal module 100 and the second phononic crystal module 200 are arranged at intervals, Figure 8 shows a scheme in which every two first phononic crystal modules 100 and every two second phononic crystal modules 200 are arranged at intervals. That is, each layer of the vibration isolation platform layer includes the first phononic crystal module 100 and the second phononic crystal module 200, and the first phononic crystal module 100 and the second phononic crystal module 200 in the same layer of the vibration isolation platform layer are arranged at intervals according to a preset rule, and the types of phononic crystal modules in adjacent layers of the vibration isolation platform layer are different or the same. The preset rule is not limited to the Figure 7 and Figure 8 shown in the scheme.
[0076] It should be noted that taking the example of a total of x layers of vibration isolation platform layers, and each layer of vibration isolation platform layer includes n rows and m columns of phononic crystal modules respectively, through a reasonable arrangement form, there are theoretically 2 nmx arrangement forms, that is, there are a large number of platform design schemes with different vibration isolation characteristics. Those skilled in the art can select a suitable arrangement method according to the vibration isolation effect.
[0077] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one" and / or "the" are not specifically singular, but may also include plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. A method or device may also include other steps or elements. An element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.
[0078] In the description of this application, unless otherwise clearly defined, terms such as "setting", "installing", "connecting", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in this application in combination with the specific content of the technical solution.
[0079] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.
[0080] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A modular passive vibration isolation platform, characterized in that, It includes at least one layer of vibration isolation platform layer, and each layer of the vibration isolation platform layer is formed by splicing a plurality of phononic crystal modules; There are at least two types of the phononic crystal modules, and two of them are respectively a first phononic crystal module (100) and a second phononic crystal module (200); The first phononic crystal module (100) includes a first phononic crystal body, the first phononic crystal body has a first module cavity, the second phononic crystal module (200) includes a second phononic crystal body and a mass block (220), the second phononic crystal body has a second module cavity, and the mass block (220) is arranged in the second module cavity.
2. The modular passive vibration isolation platform according to claim 1, characterized in that, The first phononic crystal body includes at least two first sub-modules (110), the first sub-module (110) has a first sub-module cavity (113), each of the first sub-modules (110) is assembled to form the first phononic crystal body, and each of the first sub-module cavities (113) is assembled to form the first module cavity; and / or, The second phononic crystal body includes at least two second sub-modules (210), the second sub-module (210) has a second sub-module cavity (213), each of the second sub-modules (210) is assembled to form the first phononic crystal body, and each of the second sub-module cavities (213) is assembled to form the second module cavity.
3. The modular passive vibration isolation platform according to claim 2, wherein The structures of each of the first sub-modules (110) are the same; and / or, The structures of each of the second sub-modules (210) are the same.
4. The modular passive vibration isolation platform according to claim 3, characterized in that, There are two first sub-modules (110), and the first sub-module (110) includes a first sub-module plate body (111) and a first sub-module partition block (112) arranged on the first side of the first sub-module plate body (111), the opening side of the first sub-module cavity (113) is located on the second side of the first sub-module plate body (111), and the docking surface of the two first sub-modules (110) is the surface where the second side of the first sub-module plate body (111) is located; and / or, There are two second sub-modules (210), and the second sub-module (210) includes a second sub-module plate body (211) and a second sub-module partition block (212) arranged on the first side of the second sub-module plate body (211), the opening side of the second sub-module cavity (213) is located on the second side of the second sub-module plate body (211), and the docking surface of the two second sub-modules (210) is the surface where the second side of the second sub-module plate body (211) is located.
5. The modular passive vibration isolation platform according to claim 4, wherein The first end face of the first sub-module partition block (112) is coplanar with the first end face of the first sub-module plate body (111), the second end face of the first sub-module partition block (112) is coplanar with the second end face of the first sub-module plate body (111), and the width of the first sub-module partition block (112) is smaller than the width of the first sub-module plate body (111); and / or, The first end face of the second sub-module spacer block (212) is coplanar with the first end face of the second sub-module plate body (211), the second end face of the second sub-module spacer block (212) is coplanar with the second end face of the second sub-module plate body (211), and the width of the second sub-module spacer block (212) is less than the width of the second sub-module plate body (211).
6. The modular passive vibration isolation platform according to claim 4, wherein The first sub-module cavity (113) extends to the first sub-module spacer block (112), and the second sub-module cavity (213) extends to the second sub-module spacer block (212).
7. The modular passive vibration isolation platform according to any one of claims 1-6, characterized in that The structures of the first phononic crystal body and the second phononic crystal body are the same; and / or, The materials of the first phononic crystal body and the second phononic crystal body are rubber; and / or, The material of the mass block (220) is metal, glass, rubber or plastic.
8. The modular passive vibration isolation platform according to any one of claims 1-6, characterized in that Each layer of the vibration isolation platform layer forms a platform layer group. A first mounting platform (300) and a second mounting platform (400) are respectively arranged on both sides of the platform layer group. The first mounting platform (300) is used to connect to one of the device to be protected and the excitation source, and the second mounting platform (400) is used to connect to the other of the device to be protected and the excitation source.
9. The modular passive vibration isolation platform according to any one of claims 1-6, characterized in that, Each layer of the vibration isolation platform layer includes the first phononic crystal module (100) and the second phononic crystal module (200); or, The same layer of the vibration isolation platform layer only includes one of the first phononic crystal module (100) and the second phononic crystal module (200), and the types of the phononic crystal modules of adjacent layers of the vibration isolation platform layer are different.
10. The modular passive vibration isolation platform according to claim 9, wherein, Each layer of the vibration isolation platform layer includes the first phononic crystal module (100) and the second phononic crystal module (200), and the first phononic crystal module (100) and the second phononic crystal module (200) of the same layer of the vibration isolation platform layer are arranged at intervals according to a preset rule, and the types of the phononic crystal modules of adjacent layers of the vibration isolation platform layer are different or the same.