Low-vibration silent bus duct with built-in active noise reduction structure

Abstract

The invention relates to the technical field of a low-vibration silent bus duct with a built-in active noise reduction structure, in particular to a low-vibration silent bus duct with a built-in active noise reduction structure, which comprises a lower shell, the outer walls of the front end and the rear end of the lower shell are slidably connected with connecting sliding blocks, and the outer ends of the connecting sliding blocks are fixedly connected with first hinge seats. Vibration isolation and buffering are achieved, the hidden danger of long-term loosening is solved, vibration of the lower shell is converted into sliding of the connecting sliding block and angle / displacement adjustment of the hydraulic air rod through a flexible adaptation structure of the connecting sliding block, the hydraulic air rod and the hinge base, and vibration energy is absorbed through hydraulic damping; the transmission of vibration to the mounting base and a building structure is greatly weakened, and peripheral equipment and a building are prevented from being damaged by vibration; the loosening risk caused by continuous vibration of connecting parts of the bus duct, such as a bus and a shell and the splicing position of the shell, is reduced, the reliability of electrical connection is guaranteed, the operation and maintenance period of equipment is prolonged, and the problems that traditional rigid installation is prone to loosening and faults occur frequently are solved.

Description

Technical Field

[0001] This invention relates to the field of low-vibration silent busbar trunking with built-in active noise reduction structure, and particularly to a low-vibration silent busbar trunking with built-in active noise reduction structure. Background Technology

[0002] In industrial and building electrical systems, busbar trunking is a key piece of equipment for power transmission and is widely used in high-rise buildings and factory power distribution scenarios. However, when traditional busbar trunking is in operation, it will generate significant vibration and noise problems due to the electromagnetic force of the current flowing through the busbar, the vibration of the equipment itself, and the influence of the external environment.

[0003] Vibration transmission and structural loosening are particularly prominent issues: Busbar trunking is connected to buildings or equipment via a rigid installation structure, making it susceptible to direct transmission of vibrations during operation. Over time, this not only damages the building structure or related equipment at the installation location but also causes loosening and poor contact in the busbar trunking's connecting components (such as the connection between the busbar and the shell, and the shell splice joint), reducing electrical connection reliability, increasing potential faults, affecting stable power transmission, and hindering effective vibration regulation and buffering, making it difficult to ensure long-term stable low-vibration operation. Furthermore, existing vibration reduction methods are mostly passive, such as simple rubber pads, with limited effectiveness. They cannot systematically address the series of problems caused by vibration transmission from the perspectives of structural adaptation and energy attenuation. Therefore, a low-vibration, quiet busbar trunking with a built-in active noise reduction structure is proposed to solve the aforementioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a low-vibration, silent busbar trunking with a built-in active noise reduction structure. This solves the problems that busbar trunking is connected to buildings or equipment through a rigid installation structure, and the vibration during operation is easily transmitted directly, which can cause vibration damage to the building structure or related equipment at the installation location. Continuous vibration can lead to loosening, poor contact, reduced electrical connection reliability, increased potential for failure, and impact on stable power transmission. Furthermore, it cannot effectively regulate or buffer vibration, making it difficult to ensure long-term stable low-vibration operation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a low-vibration silent busbar trunking with a built-in active noise reduction structure, comprising a lower housing, a connecting slider slidably connected to the outer walls of the front and rear ends of the lower housing, a hinge seat one fixedly connected to the outer end of the connecting slider, a hydraulic rod hinged to the inner wall of the hinge seat one, a hinge seat two hinged to the top outer wall of the hydraulic rod, a mounting base fixedly connected to the inner side of the hinge seat two, a perforated sound-absorbing frame fixedly installed on the outer walls of the front and rear ends of the lower housing, an upper housing snapped onto the top inner wall of the lower housing, and a sound-absorbing cover fixedly installed on one end of the back of the lower housing, the outer wall of the back of the sound-absorbing cover being fixedly... A connecting plate is fixedly connected to the bottom of the connecting plate, and a connecting guard plate is fixedly connected to the bottom of the connecting guard plate. A sound-absorbing sheet is fixedly connected to the inner wall of one end of the front of the connecting guard plate, and a plate is fixedly connected to the top of the sound-absorbing sheet. Mounting strips are fixedly installed on the inner walls of the front and rear ends of the bottom of the lower housing. A fixing bracket is fixedly connected to the inner side of the mounting strip, and a busbar lower clamping bracket is fixedly connected to the top of the fixing bracket. Mounting screws are threaded to the inner walls of the front and rear sections of the busbar lower clamping bracket, and a busbar is threaded to the outer wall of the top of the mounting screw. A busbar is clamped and connected to the inner walls of the busbar lower clamping bracket and the busbar upper clamping bracket. A sound-absorbing box is fixedly installed on one end of the inner side of the mounting screw.

[0006] A further improvement is that the connecting slider is located on the outside of the perforated sound-absorbing frame, and the connecting slider is symmetrically located on the front and rear outer walls of both sides of the lower housing. If the lower housing undergoes lateral displacement due to vibration, the connecting slider slides to adapt to the displacement, and the hydraulic rod can change the tilt angle through the hinge structure. If the vibration brings longitudinal impact force, the hydraulic rod uses its own hydraulic characteristics and the damping effect of the internal hydraulic oil to absorb and buffer the vibration energy, attenuate the vibration peak, and avoid the vibration being directly and rigidly transmitted to the mounting base and the main body of the building / equipment, thus achieving preliminary flexible buffering of the vibration and weakening the vibration transmission path.

[0007] A further improvement is that a slot is provided at the top of the inner wall of the lower housing, and the bottom of the upper housing is engaged with the inner wall of the slot; the engagement of the upper and lower housings forms a closed chamber, which acts like a "soundproof cover" to block the noise radiated by the vibration of the housing and the remaining noise after the initial treatment by the perforated sound-absorbing frame from spreading outward, thereby changing the noise propagation path and reducing the amount of noise radiated outward.

[0008] A further improvement is that the connecting guard plate is snapped onto the bottom outer wall of the lower housing, and the sound-absorbing sheets are equidistantly arranged on the inner wall of the connection between the connecting guard plate and the snap plate. The connecting guard plate is snapped onto the bottom outer wall of the lower housing, and the sound-absorbing sheets on the inner wall of its front side convert sound wave energy into noise radiated from the bottom of the lower housing, including housing vibration and noise reflected through the chamber, by means of the sound energy absorption characteristics of the sound-absorbing sheet material, such as the fiber sound-absorbing layer, to further reduce noise. The snap plate on the top of the sound-absorbing sheet ensures that the sound-absorbing sheet is tightly attached to the bottom of the lower housing, maintains a stable sound absorption effect, and avoids a reduction in sound absorption efficiency due to vibration or loose installation.

[0009] A further improvement is that the connection between the sound-absorbing sheet and the card plate and the connection between the sound-absorbing sheet and the connecting guard plate are located on the inner wall of the outer end of the perforated sound-absorbing frame; the reverse sound wave, through the connecting guard plate, the sound-absorbing sheet and other structures or associated sound-generating units, if configured to radiate to the periphery of the busbar, meets the original noise in space, and uses the principle of "sound wave interference" to make the positive and negative sound waves cancel each other out, actively weakening the noise intensity, achieving precise noise reduction, and making up for the shortcomings of passive sound absorption in handling noise at specific frequencies.

[0010] A further improvement is that the inner walls of the busbar lower clamp and the busbar upper clamp are provided with clamping slots at equal intervals, and the busbar lower clamp and the busbar upper clamp are provided at equal intervals on the outer wall of the busbar; the busbar lower clamp and the busbar upper clamp are connected by a screw thread to clamp the busbar; the mounting strip is made of insulating elastic material, and under the working conditions of long-term current flow and environmental temperature change, if the busbar deforms due to thermal expansion and contraction, the elastic mounting strip can adapt to the deformation, avoiding stress concentration on the busbar caused by rigid constraints.

[0011] A further improvement is that the mounting strip is made of an insulating elastic material. As the mounting strip is made of an insulating elastic material, under conditions such as long-term current flow and environmental temperature changes, if the busbar deforms due to thermal expansion and contraction, the elastic mounting strip can adapt to the deformation, avoiding stress concentration in the busbar caused by rigid constraints. At the same time, the fastening force provided by the mounting screw is combined with the clamping of the slots of the busbar lower clamp and the busbar upper clamp.

[0012] By employing the above technical solution, the present invention provides a low-vibration, quiet busbar trunking with a built-in active noise reduction structure, which has at least the following beneficial effects:

[0013] 1. This invention provides vibration isolation and buffering, resolving the long-term risk of loosening. Through a flexible adaptable structure connecting the slider, hydraulic rod, and hinged seat, the vibration of the lower housing is transformed into slider sliding and hydraulic rod angle / displacement adjustment, utilizing hydraulic damping to absorb vibration energy. On one hand, this significantly reduces the transmission of vibration to the mounting base and building structure, preventing vibration damage to surrounding equipment and buildings. On the other hand, it reduces the risk of loosening of the busbar trunking's connecting components, such as the busbar and housing, and the housing joints, due to continuous vibration, ensuring electrical connection reliability, extending equipment maintenance cycles, and solving the problems of easy loosening and frequent failures associated with traditional rigid installations.

[0014] 2. This invention employs multi-level noise reduction synergy to achieve silent operation. The perforated sound-absorbing frame utilizes Helmholtz resonance and porous materials to absorb sound, initially attenuating airborne noise. The enclosed chamber of the upper shell blocks noise radiation, while the connecting guard plate and sound-absorbing sheet specifically absorb noise from the bottom. The sound-collecting cover, combined with active noise reduction logic, generates reverse sound waves to cancel out remaining noise. From passive sound absorption to active cancellation, multi-level synergy covers a wide range of noise frequencies, significantly reducing the operating noise of the busbar trunking. This solves the problems of traditional busbar trunking's "poor single-level sound insulation effect and difficulty in handling high-frequency / low-frequency noise," adapting to the needs of quiet and refined industrial environments.

[0015] 3. This invention features elastic adaptation and structural reinforcement, enhancing operational stability. The insulated elastic mounting strips, brackets, and mounting screws work together to absorb busbar vibration energy through elastic deformation, limiting irregular vibration amplitude; and the slot clamping and threaded fastening enhance the connection stability between the busbar and the housing. The sound-absorbing box further attenuates local vibration energy. The entire process, from the vibration source busbar to the structural connection, is optimized, solving the problems of "easy vibration transmission and easy structural loosening" in traditional busbar trunking. This ensures continuous and stable power transmission and reduces the risk of electrical faults caused by vibration. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of a partial structure at the left end of the lower housing of the present invention;

[0020] Figure 3 This is a schematic diagram of the inclined tilting structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle;

[0022] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point B;

[0023] Figure 6 This is a schematic diagram of the internal structure of the busbar groove of the present invention;

[0024] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0025] Figure 8This is a partial structural diagram of the connecting guard plate of the present invention.

[0026] In the diagram: 1. Lower housing; 2. Connecting slider; 3. Hinge seat one; 4. Hydraulic rod; 5. Hinge seat two; 6. Mounting base; 7. Perforated sound-absorbing frame; 8. Upper housing; 9. Connecting guard plate; 10. Sound-absorbing sheet; 11. Clamping plate; 12. Connecting clamping plate; 13. Sound-absorbing cover; 14. Mounting strip; 15. Fixing strip frame; 16. Busbar lower clamping frame; 17. Mounting screw; 18. Busbar upper clamping frame; 19. Busbar; 20. Sound-absorbing box. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Busbar trunking is connected to buildings or equipment via a rigid installation structure. Vibrations during operation are easily transmitted directly, causing vibration damage to the building structure or related equipment. Continuous vibration can lead to loosening, poor contact, reduced electrical connection reliability, increased malfunction risks, and impact on stable power transmission. Furthermore, it cannot effectively regulate or buffer vibration, making it difficult to guarantee long-term stable low-vibration operation. This embodiment provides a low-vibration, quiet busbar trunking with a built-in active noise reduction structure. Please refer to [reference needed]. Figures 1-8The embodiment provides a low-vibration, silent busbar trunking with a built-in active noise reduction structure, including a lower housing 1. Connecting sliders 2 are slidably connected to the outer walls of the front and rear ends of the lower housing 1. A hinge seat 3 is fixedly connected to the outer end of the connecting slider 2. A hydraulic rod 4 is hinged to the inner wall of the hinge seat 3. A second hinge seat 5 is hinged to the top outer wall of the hydraulic rod 4. A mounting base 6 is fixedly connected to the inner side of the second hinge seat 5. A perforated sound-absorbing frame 7 is fixedly installed on the outer walls of the front and rear ends of the lower housing 1. An upper housing 8 is snapped onto the top inner wall of the lower housing 1. A microphone cover 13 is fixedly installed on one end of the back of the lower housing 1. A connecting plate 12 is fixedly connected to the outer wall of the back of the microphone cover 13. A connecting guard plate 9 is fixedly connected to the bottom of the connecting plate 12. A sound-absorbing sheet 10 is fixedly connected to the inner wall of one end of the front of the connecting guard plate 9. A guard plate 11 is fixedly connected to the top of the sound-absorbing sheet 10. Mounting strips 14 are fixedly installed on the inner walls of the front and rear ends of the bottom of the lower housing 1. A fixing bracket 15 is fixedly connected to the inner side of the mounting strip 14. A busbar bracket is fixedly connected to the top of the fixing bracket 15. 16. The inner walls of the front and rear sections of the busbar lower bracket 16 are threaded with mounting screws 17. The outer wall of the top of the mounting screws 17 is threaded with a busbar upper bracket 18. The inner walls of the busbar lower bracket 16 and the busbar upper bracket 18 clamp and connect the busbar 19. A sound-absorbing box 20 is fixedly installed on one end of the inner side of the mounting screws 17. The connecting slider 2 is set on the outside of the perforated sound-absorbing frame 7. The connecting slider 2 is symmetrically set on the outer walls of the front and rear ends of both sides of the lower housing 1. A slot is opened at the top of the inner wall of the lower housing 1. The bottom of the upper housing 8 is engaged with the slot. The inner wall of the groove; the connecting guard plate 9 is snapped onto the bottom outer wall of the lower housing 1, and the sound-absorbing sheet 10 is equidistantly arranged on the inner wall of the connection between the connecting guard plate 9 and the card plate 11; the connection between the sound-absorbing sheet 10 and the card plate 11 and the connection between the sound-absorbing sheet 10 and the connecting guard plate 9 are located on the inner wall of the outer end of the perforated sound-absorbing frame 7; the inner walls of the busbar card holder 16 and the busbar card holder 18 are equidistantly provided with card slots, and the busbar card holder 16 and the busbar card holder 18 are equidistantly arranged on the outer wall of the busbar 19; the mounting strip 14 is made of insulating elastic material.

[0029] Working principle: When the busbar trunking is subjected to external vibrations such as minor deformation of the building structure, vibrations from surrounding equipment, or vibrations generated by its own operation, the electromagnetic force of the busbar current flow causes the vibration to act first on the lower housing 1. The connecting sliders 2 on the outer walls of the front and rear ends of the lower housing 1 can slide along the outer wall of the lower housing 1, providing a basis for displacement adjustment for subsequent vibration buffering. The two ends of the hydraulic rod 4 are connected to the lower housing 1 and the mounting base 6 respectively through hinge seat 1 3 and hinge seat 2 5. This hinge design allows the hydraulic rod 4 to flexibly adjust its angle and position according to the vibration: if the lower housing 1 undergoes lateral displacement due to vibration, the connecting slider 2 slides to adapt to the displacement, and the hydraulic rod 4 can change its tilt angle through the hinge structure; if the vibration brings longitudinal impact force, the hydraulic rod 4 uses its own hydraulic characteristics to absorb and buffer the vibration energy through the damping effect of the internal hydraulic oil, attenuating the vibration peak and avoiding direct rigid transmission of vibration to the mounting base 6 and the building / equipment body, thus achieving preliminary flexible buffering of vibration and weakening the vibration transmission path.

[0030] Busbar 19 is one of the vibration sources, and the electromagnetic force causing its vibration is crucial to its installation and fixing structure. The mounting plate 14, made of insulating elastic material, is fixed to the inner walls of the front and rear ends of the bottom of the lower housing 1 and possesses elastic deformation capability. When busbar 19 vibrates, the elastic mounting plate 14 can absorb some of the vibration energy, acting like an "elastic pad," separating the busbar vibration from the rigid connection of the lower housing 1 and reducing the transmission of vibration to the housing. The busbar lower clamp 16 is fixed to the top of the fixing bracket 15 inside the mounting plate 14 and is threadedly connected to the busbar upper clamp 18 via mounting screws 17, clamping the busbar 19. This clamp structure, through "clamping + insulating elastic pad mounting plate," limits... The irregular vibration amplitude of busbar 19 is controlled, keeping the busbar vibration within a controllable range. On the other hand, after the mounting screw 17 is tightened, the slots of the busbar lower bracket 16 and busbar upper bracket 18 are designed to fit the busbar with equidistant slots, enhancing the connection stability between the busbar and the bracket, and between the bracket and the mounting plate. This prevents the busbar from becoming loose or having poor contact due to vibration, reducing unstable vibrations from the vibration source from a structural reinforcement perspective. The sound-absorbing box 20 at one end of the inner side of the mounting screw 17, in addition to helping absorb noise around the busbar, has close contact with the busbar and bracket. Through its own structural damping, it can further attenuate the vibration energy transmitted from the busbar to the bracket and mounting plate, acting like a "miniature vibration damper" and refining the vibration attenuation process.

[0031] Busbar operating noise is divided into structural vibration radiation noise, such as shell vibration noise, and airborne noise. Electromagnetic vibration of the busbar excites airborne sound waves. The perforated sound-absorbing frames 7 at the front and rear ends of the lower shell 1 utilize the "Helmholtz resonance" principle: noise sound waves enter the sound-absorbing frame through the perforated structure and interact with the sound-absorbing material filled inside the frame, such as porous sound-absorbing cotton. When the sound waves propagate in the pores of the porous material, the sound energy is converted into heat energy due to friction and viscosity between the air and the material, achieving the first noise absorption and attenuation, weakening the intensity of airborne noise. The upper shell 8 is snapped together with the lower shell 1 to form a closed cavity, like a "soundproof cover," blocking the shell. Vibration radiation noise and residual noise after preliminary treatment by the perforated sound-absorbing frame diffuse outwards, changing the noise propagation path and reducing the amount of noise radiated outwards; the connecting guard plate 9 is snapped onto the bottom outer wall of the lower housing 1, and the sound-absorbing sheet 10 on its front inner wall converts the sound wave energy into noise radiated from the bottom of the lower housing 1, including housing vibration and noise reflected through the chamber, through the sound energy absorption characteristics of the sound-absorbing sheet 10 material such as the fiber sound-absorbing layer, further reducing the noise; the top retaining plate 11 of the sound-absorbing sheet 10 ensures that the sound-absorbing sheet 10 is tightly attached to the bottom of the lower housing 1, maintaining a stable sound absorption effect and avoiding a reduction in sound absorption efficiency due to vibration or loose installation;

[0032] For the active noise reduction logic combined with the sound-collecting cover that is not fully covered in the background technology, the sound-collecting cover 13 is fixed to one end of the back of the lower housing 1, and the built-in sound-collecting element, such as a microphone, collects the noise signal of the bus trunking operation; the collected noise signal is transmitted to the noise reduction control module (not shown in the figure) and needs to be external or built-in. The module generates a "reverse sound wave" with the same frequency and opposite phase as the original noise through an algorithm; the reverse sound wave is connected to the protective plate 9, sound-absorbing sheet 10 and other structures or associated sound-generating units. If configured to radiate to the periphery of the bus trunking, it meets the original noise in space. Using the principle of "sound wave interference", the positive and negative sound waves cancel each other out, actively weaken the noise intensity, achieve precise noise reduction, and make up for the shortcomings of passive sound absorption in the processing of noise at specific frequencies;

[0033] The busbar lower bracket 16 and busbar upper bracket 18 are threadedly connected by mounting screws 17 to clamp the busbar 19. The mounting strip 14 is made of insulating elastic material. Under the conditions of long-term current flow and environmental temperature changes, if the busbar 19 deforms due to thermal expansion and contraction, the elastic mounting strip 14 can adapt to the deformation, avoiding stress concentration in the busbar 19 caused by rigid constraints. At the same time, the fastening force provided by the mounting screws 17, together with the clamping of the slots of the busbar lower bracket 16 and busbar upper bracket 18, stably limits the position of the busbar 19, preventing the busbar 19 from loosening due to vibration and deformation, ensuring the reliability of electrical connection, reducing additional vibration and poor contact noise caused by loosening from a structural perspective, and maintaining the long-term low vibration and quiet operation of the busbar trunking.

[0034] This busbar trunking effectively solves the problems of vibration transmission, structural loosening, and noise in the background technology through multi-dimensional synergy. It achieves low-vibration and quiet operation, ensuring stable power transmission and environmental comfort. This is achieved through the vibration buffering of the connecting slider and hydraulic rod, the passive noise absorption of the perforated sound-absorbing frame and sound-absorbing sheet, the active noise cancellation of the sound-absorbing cover and control module, and the structural reinforcement and anti-loosening of the mounting strips and brackets.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-vibration, silent busbar trunking with a built-in active noise reduction structure, comprising a lower housing (1), characterized in that: The lower housing (1) has a connecting slider (2) slidably connected to the outer walls of its front and rear ends. The outer end of the connecting slider (2) is fixedly connected to a hinge seat (3). The inner wall of the hinge seat (3) is hinged to a hydraulic rod (4). The top outer wall of the hydraulic rod (4) is hinged to a hinge seat (5). The inner side of the hinge seat (5) is fixedly connected to a mounting base (6). The outer walls of the front and rear ends of the lower housing (1) are fixedly installed with perforated sound-absorbing frames (7). The top inner wall of the lower housing (1) is snapped with an upper housing (8). One end of the back of the lower housing (1) is fixedly installed with a microphone cover (13). The back outer wall of the microphone cover (13) is fixedly connected to a connecting plate (12). The bottom of the connecting plate (12) is fixedly connected to a connecting guard plate (9). A sound-absorbing sheet (10) is fixedly connected to the inner wall of one end of the front of the receiving plate (9). A clamping plate (11) is fixedly connected to the top of the sound-absorbing sheet (10). An installation strip (14) is fixedly installed on the inner wall of the front and rear ends of the bottom of the lower housing (1). A fixing bracket (15) is fixedly connected to the inner side of the installation strip (14). A busbar clamp (16) is fixedly connected to the top of the fixing bracket (15). An installation screw (17) is threaded to the inner wall of the front and rear sections of the busbar clamp (16). A busbar clamp (18) is threaded to the outer wall of the top of the installation screw (17). A busbar (19) is clamped and connected to the inner wall of the busbar clamp (16) and the busbar clamp (18). A sound-absorbing box (20) is fixedly installed on one end of the inner side of the installation screw (17).

2. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The connecting slider (2) is located on the outside of the perforated sound-absorbing frame (7), and the connecting slider (2) is symmetrically located on the front and rear end outer walls of both sides of the lower housing (1).

3. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The lower housing (1) has a slot at the top of its inner wall, and the bottom of the upper housing (8) is engaged with the inner wall of the slot.

4. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The connecting guard plate (9) is snapped onto the bottom outer wall of the lower housing (1), and the sound-absorbing sheet (10) is equidistantly arranged on the inner wall of the connection between the connecting guard plate (9) and the card plate (11).

5. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The connection between the sound-absorbing sheet (10) and the card plate (11) and the connection between the sound-absorbing sheet (10) and the connecting guard plate (9) are located on the inner wall of the outer end of the perforated sound-absorbing frame (7).

6. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The inner walls of the busbar lower card holder (16) and the busbar upper card holder (18) are provided with card slots at equal intervals, and the busbar lower card holder (16) and the busbar upper card holder (18) are provided at equal intervals on the outer wall of the busbar (19).

7. The low-vibration, silent busbar trunking with a built-in active noise reduction structure according to claim 1, characterized in that: The mounting strip (14) is made of insulating elastic material.

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