Positioning structure of acoustic black hole plate

Abstract

The utility model relates to a positioning structure of an acoustic black hole plate, which belongs to the technical field of structural vibration and noise reduction, and comprises a structure to be subjected to vibration reduction, the top of the structure to be subjected to vibration reduction is fixedly connected with two mounting plates, a vibration reduction mechanism is arranged on the structure to be subjected to vibration reduction, and the vibration reduction mechanism comprises a plate body positioned on the structure to be subjected to vibration reduction, a plurality of acoustic black hole structures are fixedly connected to the plate body. According to the positioning structure of the acoustic black hole plate, by arranging the vibration reduction mechanism, the vibration reduction mechanism has the advantages of being simple in design, easy in material obtaining, low in price, simple and convenient in manufacturing process and the like, by means of the acoustic black hole structure, a low band gap is obtained, elastic wave propagation in a forbidden band frequency range is limited, the vibration reduction effect is achieved, and the positioning structure is suitable for popularization and application. In addition, due to the fact that the acoustic black hole structure belongs to an additional structure, the acoustic black hole structure can be improved and additionally arranged in an existing civil engineering structure, the band gap range can be controlled by changing the maximum height and the cut-off thickness of the acoustic black hole structure, and the acoustic black hole structure can adapt to different use environments.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction, and particularly relates to a positioning structure of an acoustic black hole plate. Background Art

[0002] The acoustic black hole structure utilizes the fact that the phase velocity and group velocity of elastic waves change due to the gradual change of impedance, so that the group velocity of the flexural waves propagating in the structure gradually decreases. In an ideal situation, the energy of the flexural waves within a specific frequency range passing through the structure can be completely dissipated, thereby forming a band gap, restricting the propagation of elastic waves within the forbidden band frequency range, and playing a role in vibration reduction. Making a metamaterial plate using the acoustic black hole has the characteristics of simple structural form and wide operating frequency band in terms of implementation form. At the same time, this structure can adjust the frequency range of the band gap by artificially adjusting the material parameters and geometric parameters of the structure, and has extremely strong designability.

[0003] A series of technical problems exist in the traditional acoustic black hole structure. For example, reducing the thickness of the structure to be noise-reduced to implement the acoustic black hole structure results in a decrease in structural strength, or stress concentration due to changes in the structure thickness, affecting the bearing capacity of the component. Therefore, a positioning structure of an acoustic black hole plate is proposed to solve the above-mentioned problems. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a positioning structure of an acoustic black hole plate, which has the advantages of light weight, etc., and solves the problems that reducing the thickness of the structure to be noise-reduced to implement the acoustic black hole structure results in a decrease in structural strength, or stress concentration due to changes in the structure thickness, affecting the bearing capacity of the component.

[0005] To achieve the above object, the utility model provides the following technical solution: A positioning structure of an acoustic black hole plate, including a structure to be vibration-damped, the top of the structure to be vibration-damped is fixedly connected with two mounting plates, and a vibration damping mechanism is arranged on the structure to be vibration-damped;

[0006] The vibration damping mechanism includes a plate body located on the structure to be vibration-damped, a plurality of acoustic black hole structures are fixedly connected to the plate body, and positioning mechanisms are arranged on both the left and right sides of the plate body.

[0007] Further, the positioning mechanism includes a cabin fixedly connected to the plate body, a worm is rotatably connected between the inner bottom wall and the inner top wall of the cabin, a rotating rod is rotatably connected to the front inner wall of the cabin, a worm gear meshing with the worm is fixedly connected to the outer side of the rotating rod, a connecting plate is fixedly connected to the outer side of the rotating rod, a connecting block is fixedly connected to the back of the connecting plate, a movable plate is slidably connected to the outer side of the connecting block, a limiting block is fixedly connected to the movable plate, and supporting blocks are fixedly connected to both the top and the bottom of the limiting block.

[0008] Furthermore, multiple said acoustic black hole structures are evenly and equidistantly distributed on the top of the plate body, and both the plate body and the acoustic black hole structure are made of polymethyl methacrylate (PMMA).

[0009] Furthermore, a handle for rotation is fixedly connected to the top of the worm.

[0010] Furthermore, a rectangular through hole is formed in the movable plate, and the connecting block is slidably connected to the rectangular through hole.

[0011] Furthermore, support grooves are formed in both the inner bottom wall and the inner top wall of the cabin body, and the support blocks are slidably connected to the support grooves.

[0012] Furthermore, a limiting groove is formed in the mounting plate, and the size of the limiting groove is adapted to the size of the limiting block.

[0013] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0014] 1. For the positioning structure of the acoustic black hole plate, by setting the damping mechanism, the damping mechanism has the advantages of simple design, easy availability of materials, low price, and relatively simple manufacturing process. Using the acoustic black hole structure, a lower band gap is obtained, the propagation of elastic waves in the forbidden band frequency range is restricted, and the damping effect is achieved. In addition, since it itself belongs to an additional structure, it can be improved and added in existing civil engineering structures. By changing the maximum height and truncation thickness of the acoustic black hole structure, the band gap range can be controlled so that it can adapt to different usage environments.

[0015] 2. For the positioning structure of the acoustic black hole plate, by setting the positioning component, the acoustic black hole plate has the function of positioning, achieving the effect of positioning the damping mechanism, thereby facilitating the installation of the damping mechanism on the damping structure to be reduced, improving the installation efficiency of the damping mechanism, and at the same time improving the stability of the damping mechanism after installation, facilitating the use of the user, and increasing the practicality of the positioning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is of the present utility model Figure 1 is an enlarged schematic diagram of the structure at A in

[0018] Figure 3 is a schematic structural diagram of the connecting block of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the damping mechanism of the present utility model.

[0020] In the figure: 1. Structure to be vibration-damped; 2. Mounting plate; 3. Plate body; 4. Acoustic black hole structure; 5. Cabin; 6. Worm; 7. Rotating rod; 8. Worm gear; 9. Connecting plate; 10. Connecting block; 11. Movable plate; 12. Limiting block; 13. Support block; 14. Handle. Specific implementation manner

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1. Please refer to Figures 1 to 4 , a positioning structure of an acoustic black hole plate in this embodiment includes a structure 1 to be vibration-damped. Two mounting plates 2 are fixedly connected to the top of the structure 1 to be vibration-damped, and a vibration damping mechanism is arranged on the structure 1 to be vibration-damped.

[0023] The vibration damping mechanism includes a plate body 3 on the structure 1 to be vibration-damped. A plurality of acoustic black hole structures 4 are fixedly connected to the plate body 3. The plurality of acoustic black hole structures 4 are evenly distributed at equal intervals on the top of the plate body 3. Both the plate body 3 and the acoustic black hole structures 4 are made of polymethyl methacrylate (PMMA). Positioning mechanisms are arranged on both the left and right sides of the plate body 3.

[0024] It should be noted that within a specific frequency range of the acoustic black hole structure 4, the bending wave energy is completely dissipated, thereby forming a band gap to limit the propagation of elastic waves within the forbidden band frequency range and playing a role in vibration damping.

[0025] Embodiment 2. Please refer to Figures 1 to 4 , in this embodiment, the positioning mechanism includes a cabin 5 fixedly connected to the plate body 3. A worm 6 is rotatably connected between the inner bottom wall and the inner top wall of the cabin 5. A handle 14 for rotation is fixedly connected to the top of the worm 6. A rotating rod 7 is rotatably connected to the front inner wall of the cabin 5. A worm gear 8 meshing with the worm 6 is fixedly connected to the outside of the rotating rod 7. A connecting plate 9 is fixedly connected to the outside of the rotating rod 7. A connecting block 10 is fixedly connected to the back of the connecting plate 9.

[0026] It should be noted that the worm 6 and the worm gear 8 have self-locking properties, which improve the stability of the vibration damping mechanism after installation.

[0027] Please refer to Figures 1 to 4, in this embodiment, a movable plate 11 is slidably connected to the outside of the connecting block 10. A rectangular through hole is formed in the movable plate 11, and the connecting block 10 is slidably connected to the rectangular through hole. A limiting block 12 is fixedly connected to the movable plate 11. A limiting groove is formed in the mounting plate 2, and the size of the limiting groove is adapted to the size of the limiting block 12. Support blocks 13 are fixedly connected to the top and bottom of the limiting block 12. Support grooves are formed in the inner bottom wall and inner top wall of the cabin body 5, and the support blocks 13 are slidably connected to the support grooves.

[0028] In this embodiment, the effect of positioning the damping mechanism is achieved, so as to facilitate the installation of the damping mechanism on the damping structure 1 to be damped, and the installation efficiency of the damping mechanism is improved.

[0029] The working principle of the above embodiment is: the positioning structure of the acoustic black hole plate

[0030] 1) When in use, the mounting plate 2 is fixedly installed on the structure 1 to be damped according to the size of the damping mechanism, and then the plate body 3 is placed on the structure 1 to be damped. The handle 14 is rotated, the handle 14 drives the worm 6 to rotate, the worm 6 drives the worm wheel 8 to rotate, the worm wheel 8 drives the rotating rod 7 to rotate, the rotating rod 7 drives the connecting plate 9 to rotate, the connecting plate 9 drives the connecting block 10 to rotate, and the connecting block 10 slides up and down in the rectangular through hole formed in the movable plate 11, so as to drive the movable plate 11 to move left and right, and the movable plate 11 drives the limiting block 12 to move left and right.

[0031] 2) By providing the support blocks 13 and the support grooves, the limiting block 12 is limited and supported, the stability of the limiting block 12 during movement is increased, so as to facilitate the insertion of the limiting block 12 into the limiting groove formed in the mounting plate 2, so as to facilitate the positioning of the plate body 3 on the structure 1 to be damped, so as to facilitate the damping operation on the structure 1 to be damped through the acoustic black hole structure 4. The structure of the plate body 3 and the acoustic black hole structure 4 not only has a low-frequency wide bandgap, but also can ensure its own strength, realizing the lightweight of the structure.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0033] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A positioning structure of an acoustic black hole plate, comprising a structure to be vibration-damped (1), characterized in that: Two mounting plates (2) are fixedly connected to the top of the structure (1) to be vibration-damped, and a vibration-damping mechanism is arranged on the structure (1) to be vibration-damped. The vibration-damping mechanism includes a plate body (3) located on the structure (1) to be vibration-damped. A plurality of acoustic black hole structures (4) are fixedly connected to the plate body (3), and positioning mechanisms are arranged on both the left and right sides of the plate body (3). The positioning mechanism includes a cabin (5) fixedly connected to the plate body (3). A worm (6) is rotatably connected between the inner bottom wall and the inner top wall of the cabin (5). A rotating rod (7) is rotatably connected to the front inner wall of the cabin (5). A worm gear (8) meshing with the worm (6) is fixedly connected to the outer side of the rotating rod (7). A connecting plate (9) is fixedly connected to the outer side of the rotating rod (7). A connecting block (10) is fixedly connected to the back of the connecting plate (9). A movable plate (11) is slidably connected to the outer side of the connecting block (10). A limiting block (12) is fixedly connected to the movable plate (11), and support blocks (13) are fixedly connected to both the top and the bottom of the limiting block (12).

2. The positioning structure of an acoustic black hole plate according to claim 1, characterized in that: A plurality of the acoustic black hole structures (4) are evenly and equidistantly distributed on the top of the plate body (3). Both the plate body (3) and the acoustic black hole structures (4) are made of polymethyl methacrylate.

3. The positioning structure of an acoustic black hole plate according to claim 1, characterized in that: A handle (14) for rotation is fixedly connected to the top of the worm (6).

4. The positioning structure of an acoustic black hole plate according to claim 1, characterized in that: A rectangular through hole is formed in the movable plate (11), and the connecting block (10) is slidably connected to the rectangular through hole.

5. The positioning structure of an acoustic black hole plate according to claim 1, characterized in that: Support grooves are formed in both the inner bottom wall and the inner top wall of the cabin (5), and the support blocks (13) are slidably connected to the support grooves.

6. The positioning structure of an acoustic black hole plate according to claim 1, characterized in that: A limiting groove is formed in the mounting plate (2), and the size of the limiting groove is adapted to the size of the limiting block (12).

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