Modular EMI filter structure

Abstract

The invention provides a modularized EMI filter structure, and relates to the field of EMI filters, the modularized EMI filter structure comprises a filter body and wiring terminals arranged at the two ends of the filter body, the modularized EMI filter structure further comprises a mounting and fixing assembly, the mounting and fixing assembly comprises a U-shaped mounting frame arranged in the height direction of the filter body in a sliding mode, and the bottom ends of the two sides of the U-shaped mounting frame are each rotationally provided with a set of fixing bolts; and the wiring fixing assembly comprises a pair of fixing plates which are movably arranged at the two ends of the filter body, and the fixing plates are connected with the corresponding wiring ends in a penetrating manner. The U-shaped mounting frame moves downwards to drive the fixing bolts to move downwards, due to the fact that the threaded mounting holes are static and fixed, the fixing bolts on the two sides can rotate relative to each other to enter the corresponding threaded mounting holes, mounting of the multiple fixing bolts is completed synchronously, convenience is provided for the mounting process of the filter body, the connecting disc is driven to rotate, and the fixing bolts are fixed through the connecting disc. And the external electric connection end inserted on the wiring end is synchronously fixed, so that convenience is provided for the wiring process of the filter body.

Description

Technical Field

[0001] The present invention relates to the field of EMI filters, and in particular to a modular EMI filter structure. Background Art

[0002] EMI filter, or electromagnetic interference filter, is an electronic device used to suppress electromagnetic interference (EMI), especially noise in power lines or control signal lines. It mainly works by selectively blocking or diverting harmful high-frequency signals, thereby keeping the internal noise of electronic equipment from leaking out and preventing external noise from entering the equipment.

[0003] At present, most EMI filters in the prior art are fixed to the corresponding equipment by bolts, and their wiring method is mostly bolt-type wiring. Although the bolt connection method provides a stable mechanical connection for the installation and application of the EMI filter, and can ensure that the filter maintains stable performance in harsh environments such as vibration and impact, it is necessary to turn multiple bolts to fix it during actual use, and generally, in order to ensure the fixing effect of the thread, it is also necessary to use tools such as small wrenches or screwdrivers. The installation process is relatively cumbersome, which brings inconvenience to the subsequent disassembly, replacement and maintenance process, and has low practicality.

[0004] For example: The Chinese invention patent (application number: CN202120392149.4) discloses a "filter that is easy to disassemble and assemble". Its specification discloses: However, during the use of the filter, it is often necessary to disassemble, debug and maintain it. Not only is it inconvenient to disassemble and replace the filter body, but when disassembling and debugging its wiring, it is quite inconvenient to repeatedly disassemble and assemble the bolts. Multiple disassembly and assembly can easily lead to thread wear, causing the device to loosen, which brings inconvenience to the disassembly and debugging of the filter; the above patents can prove the defects of the prior art.

[0005] Therefore, we make improvements to this and propose a modular EMI filter structure. Summary of the invention

[0006] The purpose of the present invention is to address the fact that most of the existing EMI filters are fixed to the corresponding equipment by bolts, and their wiring method is also mostly bolt-type wiring. Although the bolt connection method provides a stable mechanical connection for the installation and application of the EMI filter, and can ensure that the filter maintains stable performance in harsh environments such as vibration and impact, it is necessary to turn multiple bolts to fix them during actual use, and generally, in order to ensure the fixing effect of the thread, it is also necessary to use tools such as a small wrench or a screwdriver. The installation process is relatively cumbersome, which brings inconvenience to the subsequent disassembly, replacement and maintenance process, and has a low practicality.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides a modular EMI filter structure to improve the above-mentioned problem.

[0008] The specific application is as follows: A modular EMI filter structure comprises a filter body and wiring terminals arranged at both ends of the filter body, and also comprises an installation and fixing assembly, comprising a U-shaped mounting frame slidably arranged along the height direction of the filter body, a group of fixing bolts are rotatably arranged at the bottom ends of both sides of the U-shaped mounting frame; and a wiring fixing assembly, comprising a pair of fixing plates movably arranged at both ends of the filter body, the fixing plates are interlaced and connected with the corresponding wiring terminals; and a fixing mechanism, comprising an operating disk rotatably arranged at the top end of the filter body, the middle part of the operating disk is threadedly matched with the U-shaped mounting frame, a guide rod is arranged on the U-shaped mounting frame, and a connecting rod assembly is arranged at the bottom end of the guide rod to drive the fixing plate to move along the wiring terminal.

[0009] As a preferred technical solution of the present application, the two sides of the U-shaped mounting frame are in sliding contact with the filter body, and an extension plate is vertically arranged at the bottom end. A connecting hole is opened on the extension plate, and a fixing bolt is rotatably connected to the connecting hole. A pair of limit plates are fixed on the top of the fixing bolt, and the extension plate is located between the two limit plates.

[0010] As a preferred technical solution of the present application, the guide rod is fixed to the middle part of the U-shaped mounting frame and is coaxially arranged with the operating panel. A slot is opened in the middle part of the operating panel. The outer wall of the guide rod is provided with a first thread, and the inner wall of the slot is provided with a second thread matched with the first thread.

[0011] As a preferred technical solution of the present application, the diameter of the operating panel is larger than the width of the filter body and smaller than the length of the filter body, and a group of anti-slip grooves are provided on the side wall of the operating panel.

[0012] As a preferred technical solution of the present application, a group of L-shaped limit columns surrounding the operating panel are fixed to the top of the filter body, and the two inner walls of the L-shaped limit columns are slidably connected to the top outer wall and the side outer wall of the operating panel respectively. A damping pad is also arranged between the bottom of the operating panel and the filter body.

[0013] As a preferred technical solution of the present application, a circular opening is provided in the middle of the filter body for the guide rod to pass through, the connecting rod assembly includes a connecting disk rotatably arranged in the filter and transmission connected to the guide rod, a first connecting rod is inserted into both ends of the filter body, the inner end of the first connecting rod is located in the filter body and a second connecting rod is hinged between the connecting disk, and linear openings are provided on both sides of the U-shaped mounting frame for the first connecting rod to pass through.

[0014] As a preferred technical solution of the present application, a driving groove is provided on the outer wall of the guide rod, and the driving groove includes a vertical groove and an arc groove extending obliquely along the outer wall of the guide rod, and the connecting ends of the vertical groove and the arc groove are smoothly connected. The middle part of the connecting plate has a tubular connecting part coaxial with the guide rod, and the tubular connecting part is sleeved on the outer wall of the guide rod, and a slider embedded in the driving groove is fixed to the inner wall of the tubular connecting part.

[0015] As a preferred technical solution of the present application, the length of the vertical groove is not less than half the length of the fixing bolt.

[0016] As a preferred technical solution of the present application, the top of the tubular connecting portion has a protrusion extending outward, and a connecting seat is installed on the top inner wall of the filter body. The connecting seat has a step surface that matches the protrusion, and the protrusion is slidably connected to the step surface.

[0017] As a preferred technical solution of the present application, a U-shaped fixing frame is installed on both sides of the filter body, a threaded rod is fixed in the middle of the U-shaped fixing frame, and a threaded groove matching the threaded rod is opened in the middle of the fixing bolt. Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. A set of fixing bolts are rotatably arranged at the bottom ends of both sides of the U-shaped mounting frame, and the fixing bolts can rotate on the U-shaped mounting frame. In the specific implementation process, the fixing bolts are aligned with the external threaded mounting holes, and the fixing bolts are driven to move downward by moving the U-shaped mounting frame downward. Since the threaded mounting holes are statically fixed, the fixing bolts on both sides will relatively rotate and enter the corresponding threaded mounting holes, and the installation of multiple fixing bolts is completed synchronously, which provides convenience for the installation process of the filter body; 2. Through the connection disk, the first connecting rod, the second connecting rod and the fixing plate, the connection disk is driven to rotate, so that the fixing plates on both sides of the filter body are synchronously moved toward the filter body, and the external electrical connection terminals inserted on the wiring terminals are synchronously abutted and fixed, providing convenience for the wiring process of the filter body; 3. By setting the operating disk, guide column, drive groove and connecting disk, the U-shaped mounting frame can be moved in the vertical direction by rotating the operating disk, and the connecting disk can be driven to rotate at the same time. By operating a single operating disk, the installation process of the filter body and the connection and fixation of the filter body terminal with the external electrical connection terminal can be realized, which simplifies the operation process, provides greater convenience for the installation and use of the filter body, and improves the practicality of the filter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of the modular EMI filter structure provided in this application; Figure 2 A schematic diagram of the separation structure of the modular EMI filter structure provided in this application; Figure 3 A schematic diagram of the structure of the installation and fixing components of the modular EMI filter structure provided in this application; Figure 4 The modular EMI filter structure provided in this application Figure 3 The enlarged view of point A in the middle; Figure 5 A schematic diagram of the structure of a connecting rod assembly of a modular EMI filter structure provided in this application; Figure 6 The modular EMI filter structure provided in this application Figure 5 The enlarged view of point B in the middle; Figure 7 A schematic structural diagram of a U-shaped fixing frame and fixing bolts of a modular EMI filter structure provided in the present application.

[0019] Indicated in the figure: 1. Filter body; 11. Terminal; 2. Mounting and fixing assembly; 21. U-shaped mounting bracket; 22. Fixing bolt; 23. Guide rod; 24. Extension plate; 25. Connection hole; 26. Limit plate; 27. Linear port; 3. Fixing plate; 4. Fixing mechanism; 41. Operating panel; 42. Notch; 43. First thread; 44. Second thread; 45. L-shaped limit column; 5. Connecting rod assembly; 51. Connecting plate; 52. First connecting rod; 53. Second connecting rod; 54. Vertical groove; 55. Arc groove; 56. Tubular connecting part; 57. Sliding block; 58. Raised part; 6. Connecting seat; 7. U-shaped fixing frame; 71. Threaded rod; 72. Threaded groove. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] As described in the background technology, most EMI filters are fixed to the corresponding equipment by bolts, and their wiring method is mostly bolt-type wiring. Although the bolt connection method provides a stable mechanical connection for the installation and application of the EMI filter, and can ensure that the filter maintains stable performance in harsh environments such as vibration and impact, it is necessary to turn multiple bolts to fix it during actual use, and generally, in order to ensure the fixing effect of the thread, it is also necessary to use tools such as small wrenches or screwdrivers. The installation process is relatively cumbersome, which brings inconvenience to the subsequent disassembly, replacement and maintenance process, and has low practicality.

[0022] In order to solve this technical problem, the present invention provides a modular EMI filter structure, which is applied to the disassembly and assembly of the EMI filter.

[0023] Specifically, please refer to Figures 1 to 7 The modular EMI filter structure specifically includes a filter body 1, namely, an EMI filter, which is an electronic circuit device used to suppress electromagnetic interference, especially noise in power lines or control signal lines. It mainly works by selectively blocking or diverting harmful high-frequency signals, thereby keeping the internal noise of the electronic equipment from leaking outward and preventing external noise from entering the equipment. This is a relatively mature technical means available, and will not be described in detail here. It also includes terminal 11 arranged at both ends of the filter body 1.

[0024] Furthermore, it also includes an installation and fixing component 2, including a U-shaped mounting frame 21 slidingly arranged along the height direction of the filter body 1, and a group of fixing bolts 22 are rotatably arranged at the bottom ends of both sides of the U-shaped mounting frame 21; through the U-shaped mounting frame 21 and the fixing bolts 22 rotatably arranged on the U-shaped mounting frame 21, in the specific implementation process, by aligning the fixing bolts 22 with the external threaded mounting holes, the fixing bolts 22 are driven to move downward by moving the U-shaped mounting frame 21 downward. Since the threaded mounting holes are stationary and fixed, the fixing bolts 22 on both sides will rotate relative to each other and enter the corresponding threaded mounting holes, thereby completing the installation process of the filter body 1.

[0025] Furthermore, it also includes a wiring fixing component, including a pair of fixing plates 3 movably arranged at both ends of the filter body 1, the fixing plates 3 are interlaced and connected with the corresponding wiring terminals 11, and a fixing mechanism 4, including an operating disk 41 that is rotated to the top of the filter body 1, the middle part of the operating disk 41 is threadedly matched with the U-shaped mounting frame 21, and the U-shaped mounting frame 21 is provided with a guide rod 23, and the bottom end of the guide rod 23 is provided with a connecting rod assembly 5 that drives the fixing plate 3 to move along the wiring terminal 11; in the specific implementation, the relationship between the threaded matching between the U-shaped mounting frame 21 and the operating disk 41 and the U-shaped mounting frame 21 are provided. The restriction on sliding along the height direction on the filter body 1 can be driven by rotating the operating disk 41 to move the U-shaped mounting frame 21 up and down, thereby driving the fixing bolts 22 to move synchronously, thereby realizing the installation process of the U-shaped mounting frame 21. At the same time, through the provided connecting rod assembly 5, the fixing plates 3 on both sides are driven by the connecting rod assembly 5 to make linear motion along the wiring terminal 11. When wiring, the electrical connection end (generally a U-shaped electrical connection piece) at the outer end is inserted into the wiring terminal 11, driving the fixing plate 3 to be closely contacted and fixed with the electrical connection end, thereby completing the wiring process of the filter body 1. The structure is simple and the operation is convenient.

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] Example 1, please refer to Figures 1 to 7 A modular EMI filter structure, both sides of the U-shaped mounting frame 21 are in sliding contact with the filter body 1, which limits the movement of the U-shaped mounting frame 21, that is, the U-shaped mounting frame 21 only moves in the vertical direction, and an extension plate 24 is vertically arranged at the bottom end of the U-shaped mounting frame 21, and a connecting hole 25 is opened on the extension plate 24, and a fixing bolt 22 is rotatably connected to the connecting hole 25, and a pair of limiting plates 26 are fixed on the top of the fixing bolt 22, and the extension plate 24 is located between the two limiting plates 26, so that the fixing bolt 22 can rotate on the U-shaped mounting frame 21, and then when the U-shaped mounting frame 21 moves down, the fixing bolt 22 can be screwed into the corresponding threaded mounting hole.

[0030] Furthermore, U-shaped fixing frames 7 are installed on both sides of the filter body 1, and a threaded rod 71 is fixed in the middle of the U-shaped fixing frame 7. A threaded groove 72 compatible with the threaded rod 71 is opened in the middle of the fixing bolt 22. Due to the threaded matching relationship between the threaded rod 71 and the fixing bolt 22, in the specific implementation, the U-shaped mounting frame 21 moves downward and drives the fixing bolt 22 to move downward synchronously, which can make the fixing bolt 22 rotate on its own, thereby making it more convenient and labor-saving to screw the fixing bolt 22 into the corresponding threaded mounting hole, thereby further improving the convenience of installation of the filter body 1.

[0031] Furthermore, the guide rod 23 is fixed to the middle part of the U-shaped mounting frame 21 and is coaxially arranged with the operating disk 41. A slot 42 is opened in the middle part of the operating disk 41. The outer wall of the guide rod 23 is provided with a first thread 43, and the inner wall of the slot 42 is provided with a second thread 44 adapted to the first thread 43. Since the two sides of the U-shaped mounting frame 21 are in sliding contact with the filter body 1, in the process of rotating the operating disk 41, the threaded cooperation between the guide rod 23 and the operating disk 41 can drive the guide rod 23 to move vertically accordingly, and then drive the corresponding U-shaped mounting frame 21 to move synchronously in the vertical direction, thereby realizing the operation process of the U-shaped mounting frame 21.

[0032] Through the cooperation of the above structure, by rotating a single operating disk 41, the installation process of multiple fixing bolts 22 and corresponding threaded mounting holes can be realized, the structure is simple and the operation is convenient.

[0033] Furthermore, the diameter of the operating disk 41 is larger than the width of the filter body 1 and smaller than the length of the filter body 1, so that the outer edge of the operating disk 41 protrudes out of a portion of the filter body 1, which is convenient for rotating the operating disk 41 during installation. At the same time, a group of anti-slip grooves are provided on the side wall of the operating disk 41, making the overall rotation process of the operating disk 41 more convenient and reducing the probability of hand slipping when installing the fixing bolts 22 on the rotating operating disk 41.

[0034] Furthermore, a group of L-shaped limit columns 45 surrounding the operating disk 41 are fixed to the top of the filter body 1, and the two inner walls of the L-shaped limit columns 45 are respectively slidably connected to the top outer wall and the side outer wall of the operating disk 41 to limit the operating disk 41 so that the operating disk 41 can rotate. A damping pad is also arranged between the bottom of the operating disk 41 and the filter body 1 to provide friction for the rotation of the operating disk 41 and improve the stability of the operating disk 41 in a stationary state.

[0035] Example 2 further optimizes the modular EMI filter structure provided in Example 1. Specifically, please refer to Figures 1 to 7A circular opening is provided in the middle of the filter body 1 for the guide rod 23 to pass through, the connecting rod assembly 5 includes a connecting disk 51 rotatably arranged in the filter and transmission-connected to the guide rod 23, a first connecting rod 52 is inserted at both ends of the filter body 1, the inner end of the first connecting rod 52 is located in the filter body 1 and a second connecting rod 53 is hinged between the connecting disk 51, and a linear opening 27 is provided on both sides of the U-shaped mounting frame 21 for the first connecting rod 52 to pass through, through the connecting disk 51, the connecting disk 51 is rotated, and the corresponding second connecting rod 53 is driven to move synchronously to generate displacement, thereby pulling the first connecting rod 52 to perform linear motion synchronously, and correspondingly, driving the fixing plate 3 to perform linear motion synchronously along the terminal 11, thereby facilitating the fixation of the external electrical connection terminal inserted on the terminal 11.

[0036] Specifically, a driving groove is provided on the outer wall of the guide rod 23, and the driving groove includes a vertical groove 54 and an arc groove 55 extending obliquely along the outer wall of the guide rod 23, and the connecting ends of the vertical groove 54 and the arc groove 55 are smoothly connected. The middle part of the connecting plate 51 has a tubular connecting part 56 coaxial with the guide rod 23, and the top of the tubular connecting part 56 has a protrusion 58 extending outward. A connecting seat 6 is installed on the inner wall of the top of the filter body 1, and the connecting seat 6 has a step surface adapted to the protrusion 58, and the protrusion 58 is slidably connected to the step surface. The tubular connecting part 56 is sleeved on the outer wall of the guide rod 23, and a slider 57 embedded in the driving groove is fixed to the inner wall of the tubular connecting part 56; In the specific process of the filter body 1, the U-shaped mounting frame 21 is driven to move downward first by the unidirectional rotating operating disk 41. During this process, the slider 57 first slides in the vertical groove 54, that is, the connecting disk 51 is in a stopped state. When the slider 57 enters the arc groove 55, due to the linear motion of the guide rod 23, the slider 57 is squeezed by the arc groove 55 to drive the rotation of the connecting disk 51, and then drives the corresponding fixing plate 3 to move synchronously. Through the setting and coordination of the above-mentioned structure, by operating a single operating disk 41, the installation and fixation of the filter body 1 and the connection and fixation of the filter terminal 11 with the external electrical connection terminal can be realized, the operation process is simplified, greater convenience is provided for the installation and use of the filter, and the practicality of the filter body 1 is improved.

[0037] Furthermore, the length of the vertical groove 54 is not less than half the length of the fixing bolt 22, and the corresponding distance that the guide rod 23 drives the U-shaped mounting frame 21 to move downward without driving the connecting plate 51 to rotate is not less than half the length of the fixing bolt 22. The purpose is to facilitate the subsequent wiring work after the initial installation of the filter body 1. Correspondingly, after the electrical connection end is fixed on the wiring terminal 11 of the filter body 1, continuing to rotate the operating disk 41 can complete the entire installation and wiring fixing operation. The advantage of this design is that there is no need to remove the entire filter body 1 when replacing the electrical connection end later.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A modular EMI filter structure, comprising a filter body (1), and connection terminals (11) arranged at two ends of the filter body (1), characterized in that: Also includes: The mounting and fixing assembly (2) comprises a U-shaped mounting frame (21) slidably arranged along the height direction of the filter body (1), and a group of fixing bolts (22) are rotatably arranged at the bottom ends of both sides of the U-shaped mounting frame (21); A wiring fixing assembly, comprising a pair of fixing plates (3) movably arranged at two ends of the filter body (1), the fixing plates (3) being interlacedly connected with corresponding wiring terminals (11); The fixing mechanism (4) comprises an operating disk (41) which is rotated and arranged at the top end of the filter body (1); the middle portion of the operating disk (41) is threadedly engaged with a U-shaped mounting frame (21); a guide rod (23) is arranged on the U-shaped mounting frame (21); and a connecting rod assembly (5) is arranged at the bottom end of the guide rod (23) for driving the fixing plate (31) to move along the terminal (11).

2. A modular EMI filter structure according to claim 1, characterized in that: Both sides of the U-shaped mounting frame (21) are in sliding contact with the filter body (1), and an extension plate (24) is vertically arranged at the bottom end of each frame. A connection hole (25) is provided on the extension plate (24), and a fixing bolt (22) is rotatably connected to the connection hole (25). A pair of limit plates (26) are fixed to the top of the fixing bolt (22), and the extension plate (24) is located between the two limit plates (26).

3. A modular EMI filter structure according to claim 2, characterized in that: The guide rod (23) is fixed to the middle of the U-shaped mounting frame (21) and is coaxially arranged with the operating panel (41); a notch (42) is provided in the middle of the operating panel (41); the outer wall of the guide rod (23) is provided with a first thread (43); and the inner wall of the notch (42) is provided with a second thread (44) that matches the first thread (43).

4. A modular EMI filter structure according to claim 3, characterized in that: The diameter of the operating disk (41) is greater than the width of the filter body (1) and less than the length of the filter body (1), and a group of anti-slip grooves are provided on the side wall of the operating disk (41).

5. A modular EMI filter structure according to claim 4, characterized in that: A group of L-shaped limiting columns (45) surrounding the operating panel (41) are fixed to the top of the filter body (1); two inner walls of the L-shaped limiting columns (45) are respectively slidably connected to the top outer wall and the side outer wall of the operating panel (41); and a damping pad is further provided between the bottom of the operating panel (41) and the filter body (1).

6. A modular EMI filter structure according to claim 5, characterized in that: A circular opening is provided in the middle of the filter body (1) for the guide rod (23) to pass through, the connecting rod assembly (5) comprises a connecting plate (51) rotatably arranged in the filter and drivingly connected to the guide rod (23), a first connecting rod (52) is inserted through both ends of the filter body (1), an inner end of the first connecting rod (52) is located in the filter body (1) and a second connecting rod (53) is hingedly connected to the connecting plate (51), and linear openings (27) are provided on both sides of the U-shaped mounting frame (21) for the first connecting rod (52) to pass through.

7. A modular EMI filter structure according to claim 6, characterized in that: The outer wall of the guide rod (23) is provided with a driving groove, the driving groove comprising a vertical groove (54) and an arc groove (55) extending obliquely along the outer wall of the guide rod (23), the connecting ends of the vertical groove (54) and the arc groove (55) being smoothly connected, the middle part of the connecting plate (51) having a tubular connecting portion (56) coaxial with the guide rod (23), the tubular connecting portion (56) being sleeved on the outer wall of the guide rod (23), and a sliding block (57) embedded in the driving groove being fixed to the inner wall of the tubular connecting portion (56).

8. A modular EMI filter structure according to claim 7, characterized in that: The length of the vertical groove (54) is not less than half the length of the fixing bolt (22).

9. A modular EMI filter structure according to claim 8, characterized in that: The top of the tubular connecting portion (56) has a protruding portion (58) extending outwards, the top inner wall of the filter body (1) is provided with a connecting seat (6), the connecting seat (6) has a stepped surface matching the protruding portion (58), and the protruding portion (58) is slidably connected to the stepped surface.

10. A modular EMI filter structure according to claim 9, characterized in that: A U-shaped fixing frame (7) is installed on both sides of the filter body (1), a threaded rod (71) is fixed in the middle of the U-shaped fixing frame (7), and a threaded groove (72) matching the threaded rod (71) is formed in the middle of the fixing bolt (22).

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