Multi-pin quick plugging type thin film capacitor connecting structure

Abstract

The invention relates to the technical field of power electronic capacitor connection, and discloses a multi-pin quick plugging type thin film capacitor connection structure, which comprises a mainboard, a connection seat, two side mounting plates, two end mounting plates and a thin film capacitor body, and is characterized in that the connection seat is arranged on the upper surface of the mainboard, and the end mounting plates are arranged on the upper surface of the mainboard; and the two sides of the connecting seat are provided with grooves. According to the multi-pin quick plug type thin film capacitor connecting structure, through combination of various connecting and fixing modes, such as embedding of the clamping blocks and the grooves, matching of the bolts and the threaded grooves, clamping of the abutting plates and the protruding strips and the like, connection between the thin film capacitor body and the main board is more stable and not prone to loosening, the reliability of the connecting structure is effectively improved, and the service life of the thin film capacitor is prolonged. And through the gap between the side mounting plate and the connecting seat and the design of the elastic sheet and the spring, the plugging operation of the pins and the plugboard is easier and more convenient, and the mounting and dismounting can be completed without using a special tool.

Description

Technical Field

[0001] The invention relates to the technical field of power electronic capacitor connection, in particular to a multi-pin quick plug-in type film capacitor connection structure. Background Art

[0002] Film capacitors are capacitors with plastic film as dielectric. Due to their advantages of low loss, high precision and high stability, they are widely used in electronic and power systems, such as power filtering, signal coupling and bypass circuits. However, with the miniaturization and high performance of electronic equipment, higher requirements are placed on the installation and connection of film capacitors.

[0003] There are some shortcomings in the traditional connection method of thin film capacitors: 1) The connection operation is cumbersome. Conventional welding connections require professional welding equipment and technicians to operate. The welding process is relatively complicated and it is easy for the capacitor to be damaged or the connection to be loose due to factors such as improper welding temperature and excessive welding time; 2) Replacement is difficult. When the film capacitor fails or needs to be upgraded, the welded capacitor is difficult to disassemble, and the entire circuit board often needs to be heated and disassembled, which will not only damage other components on the circuit board, but also have high maintenance costs and long time; 3) Reliability issues. During long-term use, the welding connection may cause the solder joints to crack due to factors such as thermal stress and mechanical stress, thereby affecting the stability and reliability of the circuit, especially in some electronic equipment working in high vibration and high temperature environments.

[0004] Based on this, it is necessary to propose a multi-pin quick-plug film capacitor connection structure. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-pin quick-plug film capacitor connection structure, which has the advantages of simple connection operation, convenient replacement and high reliability, and solves the problems raised in the background technology.

[0006] The present invention provides the following technical solution: a multi-pin quick plug-in film capacitor connection structure, comprising a main board, a connection seat, a side mounting plate, an end mounting plate and a film capacitor body: The connecting seat is arranged on the upper surface of the main board, the number of the side mounting plates is two, and they are respectively located on both sides of the connecting seat, the number of the end mounting plates is two, and they are respectively located at both ends of the connecting seat, the inner surface of the end mounting plate is fixedly connected with a card block, both ends of the connecting seat are provided with a first groove, and the card block can be embedded in the inside of the first groove, the four corners of the end mounting plate are threaded with bolts, both ends of the side mounting plate are provided with thread grooves, and the thread grooves are consistent with the model specifications of the bolts, the film capacitor body is arranged at the top of the end mounting plate, the bottom end of the film capacitor body is fixedly connected with a bottom plate, the bottom end of the bottom plate is fixedly connected with a plug-in plate, and the bottom end of the plug-in plate is fixedly connected with a number of pins.

[0007] Preferably, a gap is designed between the edge mounting plate and the connecting seat, and the width of the gap between the edge mounting plate and the connecting seat is 0.8-1.2 mm for inserting the pins and the plug-in board.

[0008] Preferably, both side surfaces of the connection seat are provided with a plurality of guide grooves, the number of the guide grooves is consistent with the number of pins, the surface of the pins is tin-plated, the inner wall of the guide groove is fixedly connected with an electrode strip, and the surface of the electrode strip is provided with a metal conductive layer.

[0009] Preferably, the inner wall of the edge mounting plate is fixedly connected with a mounting groove, a contact piece is provided on one side of the mounting groove, a spring 2 is fixedly connected to the surface of one side of the contact piece, one end of the spring 2 is fixedly connected to the surface of the mounting groove, an elastic piece is provided on the other side surface of the contact piece, the elastic piece is made of phosphor bronze and has a thickness of 0.2 mm, and the elastic piece is tightly pressed against the side of the pin.

[0010] Preferably, the top and bottom ends of the side surfaces of the abutting piece close to the elastic piece are fixedly connected with clamping joints, and are clamped with the top and bottom ends of the elastic piece respectively.

[0011] Preferably, a trapezoidal guide bar is fixedly connected to the top end of the inner wall of the side mounting plate, a pressure plate is provided below the trapezoidal guide bar, a convex strip is fixedly connected to the bottom end of the pressure plate, a second groove is provided on the side of the plug plate, the convex strip can be snapped into the inside of the second groove, a spring 1 is fixedly connected to the side of the pressure plate, the other end of the spring 1 is fixedly connected to the inner wall surface of the side mounting plate, a tightening screw is threadedly connected to the surface of the side mounting plate, and the end of the tightening screw is in abutment with the side of the pressure plate.

[0012] Preferably, a mounting bar is fixedly connected to the outer edge of the bottom end of the side mounting plate, a long through groove is provided on the surface of the mounting bar, and a mounting bolt is inserted into the interior of the long through groove.

[0013] Preferably, thermal conductive silicone grease is provided at the bottom end of the connecting seat.

[0014] Preferably, a sealing gasket is sleeved on the surface of the bottom plate, and the bottom end of the sealing gasket abuts against the top ends of the side mounting plate and the end mounting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This multi-pin quick-plug film capacitor connection structure combines a variety of connection and fixing methods, such as the embedding of the card block and the groove, the matching of the bolt and the threaded groove, the clamping of the pressure plate and the convex strip, etc., so that the connection between the film capacitor body and the mainboard is more stable and not easy to loosen, which effectively improves the reliability of the connection structure and reduces the risk of equipment failure caused by poor connection. The gap between the edge mounting plate and the connection seat and the design of the elastic sheet and the spring make the plugging and unplugging operation of the pins and the plug-in board easier and more convenient, and the installation and disassembly can be completed without the use of special tools, which greatly improves the assembly and maintenance efficiency of the equipment. The tinning treatment on the surface of the pins, the metal conductive layer on the surface of the electrode strips and the precise conductive The structural design significantly reduces the contact resistance, enhances the stability and efficiency of current transmission, ensures that the film capacitor can normally exert its electrical performance under various working conditions, and improves the overall performance of electronic equipment. The application of thermal conductive silicone grease effectively improves the heat conduction between the connector and the motherboard, dissipates the heat generated by the capacitor in time, prevents the capacitor from being damaged due to overheating, and extends the service life of the capacitor. It also helps to improve the working stability and reliability of electronic equipment. The use of sealing gaskets can effectively prevent dust, moisture and other impurities from entering the connection structure, protect the electrical performance of the capacitor from being affected by the external environment, and improve the protection level of the connection structure, making it suitable for various harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the main structure of the film capacitor of the present invention; Figure 3 This is a schematic diagram of the split structure of the connection seat, the side mounting plate and the end mounting plate of the present invention; Figure 4 This is a schematic diagram of the structure of the connecting seat of the present invention; Figure 5 This is a schematic diagram of the structure of the edge mounting plate of the present invention; Figure 6It is a schematic diagram of the abutment sheet structure of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 100. Mainboard; 200, connecting seat; 201, guide groove; 202, electrode strip; 203, first groove; 204, thermal conductive silicone grease; 300, side mounting plate; 301, threaded groove; 302, trapezoidal guide bar; 303, pressing plate; 304, convex strip; 305, spring 1; 306, tightening screw; 307, mounting groove; 400, end mounting plate; 401, bolt; 402, clamping block; 500, abutment sheet; 501, second spring; 502, clamping joint; 503, elastic sheet; 600, film capacitor body; 601, bottom plate; 602, plug-in board; 603, pin; 604, second groove; 605, sealing gasket; 700, mounting strip; 701, long through slot; 702, mounting bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0020] Reference Figure 1-Figure 6 As shown, a multi-pin quick plug-in film capacitor connection structure includes a main board 100, a connection seat 200, a side mounting plate 300, an end mounting plate 400 and a film capacitor body 600: The connecting seat 200 is arranged on the upper surface of the mainboard 100 as the supporting base of the entire connecting structure. There are two side mounting plates 300, which are respectively located on both sides of the connecting seat 200, playing the role of auxiliary fixing and guiding plugging and unplugging. There are two end mounting plates 400, which are respectively located at both ends of the connecting seat 200. This layout design makes the positions of various components on the mainboard clear and reasonable, and provides a stable framework for subsequent connection and installation. The inner surface of the end mounting plate 400 is fixedly connected with a clamping block 402, which further enhances the stability of the connection structure and the positioning accuracy of the film capacitor body 600. Both ends of the connecting seat 200 are provided with a first groove 203, and the clamping block 402 can be embedded in the inside of the first groove 203. Through the cooperation of the clamping block 402 and the first groove 203, a close connection between the end mounting plate 400 and the connecting seat 200 is achieved, which prevents the end mounting plate 400 from being displaced during use, ensuring the stability of the entire connection structure and the positioning accuracy of the film capacitor body 600. The end mounting plate 400 Bolts 401 are threadedly inserted at the four corners, and thread grooves 301 are provided at both ends of the side mounting plate 300. The thread grooves 301 match the model specifications of the bolts 401. When the side mounting plate 300 and the end mounting plate 400 are connected by bolts 401, the combination of the two is tighter, and the entire connection structure is further strengthened, so that it can withstand greater external forces, ensuring the integrity and stability of the connection structure. The film capacitor body 600 is arranged at the top of the end mounting plate 400 and is the core component for realizing the capacitor function. The bottom end of the film capacitor body 600 is fixedly connected to the bottom plate 601, and the bottom end of the bottom plate 601 is fixedly connected to the plug-in board 602, and the bottom end of the plug-in board 602 is fixedly connected to a number of pins 603. This multi-layer structure design concept not only ensures the stability of the film capacitor body 600 during installation, but also facilitates connection with the external circuit, realizing the effective transmission of electrical performance. After testing, under the condition of a vibration frequency of 100Hz, the contact resistance change rate of this structure is less than 2%, and the insertion and extraction force is 3N±0.5N.

[0021] Further preferably, a gap is designed between the edge mounting plate 300 and the connecting seat 200 for inserting the pin 603 and the plug-in board 602. The width of the gap between the edge mounting plate 300 and the connecting seat 200 is 0.8-1.2 mm. When installing the film capacitor body 600, the pin 603 can be easily inserted into the corresponding position through this gap. It is also convenient to operate when the film capacitor body 600 needs to be disassembled or replaced, thereby improving the efficiency of installation and disassembly.

[0022] Further preferably, a plurality of guide grooves 201 are provided on the surfaces of both sides of the connecting socket 200, and the number of the guide grooves 201 is consistent with that of the pins 603. The surface of the pins 603 is tin-plated, which can improve the conductivity and oxidation resistance of the pins 603, reduce the contact resistance, and ensure the stability of current transmission. The inner wall of the guide groove 201 is fixedly connected with an electrode strip 202, and the surface of the electrode strip 202 is provided with a metal conductive layer. The metal conductive layer can enhance the conductive properties of the electrode strip 202, so that the electrical connection between the pins 603 and the electrode strip 202 is better, thereby further improving the working efficiency of the capacitor.

[0023] Further preferably, the inner wall of the edge mounting plate 300 is fixedly connected with a mounting groove 307, and a contact piece 500 is arranged on one side of the mounting groove 307. A spring 2 501 is fixedly connected to the surface of one side of the contact piece 500, and one end of the spring 2 501 is fixedly connected to the surface of the mounting groove 307. An elastic piece 503 is arranged on the other side surface of the contact piece 500. The elastic piece 503 is made of phosphor bronze and has a thickness of 0.2 mm. The elastic piece 503 is tightly pressed against the side of the pin 603. Through the action of the spring 2 501 and the elastic piece 503, a certain elastic pressure can be provided when the pin 603 is inserted, so that the contact between the pin 603 and the electrode strip 202 is closer. At the same time, it plays a buffering and guiding role during the plugging and unplugging process, reduces the wear of the pin 603, and extends the service life of the pin 603.

[0024] Further preferably, the top and bottom ends of the side surfaces of the abutment sheet 500 close to the elastic sheet 503 are fixedly connected with a clamping joint 502, and are respectively clamped with the top and bottom ends of the elastic sheet 503. This clamping structure can further limit the movement range of the elastic sheet 503, ensure the stability and reliability of the elastic sheet 503 during operation, prevent the elastic sheet 503 from being damaged or losing elasticity due to excessive movement, and ensure the normal operation of the entire elastic structure.

[0025] Further preferably, a trapezoidal guide bar 302 is fixedly connected to the top of the inner wall of the side mounting plate 300, a pressing plate 303 is arranged below the trapezoidal guide bar 302, a convex strip 304 is fixedly connected to the bottom end of the pressing plate 303, a second groove 604 is provided on the side of the plug board 602, and the convex strip 304 can be snapped into the inside of the second groove 604. Through the cooperation of the trapezoidal guide bar 302 and the convex strip 304 with the second groove 604, the plug board 602 can be accurately positioned and guided, so that the plug board 602 is smoother during the insertion process, avoiding the problem of poor connection caused by crooked insertion, and at the same time effectively preventing the plug board 602 from shaking after installation, ensuring that the plug board 602 and the pin 6 03, a spring 305 is fixedly connected to the side of the pressure plate 303, and the other end of the spring 305 is fixedly connected to the inner wall surface of the side mounting plate 300, and the spring 305 can provide a certain elastic force, so that the pressure plate 303 always maintains pressure on the plug board 602, ensuring good contact between the plug board 602 and the pin 603, and the surface of the side mounting plate 300 is threadedly connected with a tightening screw 306, and the end of the tightening screw 306 is in contact with the side of the pressure plate 303. By rotating the tightening screw 306, the pressure of the pressure plate 303 on the plug board 602 can be adjusted, thereby further optimizing the conductive performance of the connection structure to meet the requirements under different working environments.

[0026] Further preferably, a mounting bar 700 is fixedly connected to the outer edge of the bottom end of the edge mounting plate 300, a long through groove 701 is provided on the surface of the mounting bar 700, and a mounting bolt 702 is inserted into the interior of the long through groove 701. Through the cooperation of the mounting bar 700, the mounting bolt 702 and the nut, the entire connection structure can be conveniently installed on the motherboard 100 of the electronic device, which is convenient for the assembly and maintenance of the equipment, while also ensuring the installation firmness of the connection structure on the motherboard 100.

[0027] Further preferably, a thermal grease 204 is provided at the bottom end of the connecting socket 200. The thermal grease 204 can fill the tiny gap between the connecting socket 200 and the mainboard 100, thereby improving the heat conduction efficiency, preventing the capacitor from being damaged due to overheating during operation, extending the service life of the capacitor, and ensuring the stability and reliability of the capacitor under various working conditions.

[0028] Further preferably, a sealing gasket 605 is provided on the surface of the base plate 601, and the bottom end of the sealing gasket 605 abuts against the top of the edge mounting plate 300 and the end mounting plate 400. The sealing gasket 605 can effectively prevent impurities such as dust and moisture from entering the interior of the connection structure, thereby protecting the electrical performance of the capacitor and the stability of the connection structure, avoiding the occurrence of short circuits or other faults due to the entry of impurities, and providing a good environmental protection for the normal operation of the capacitor.

[0029] Working principle: First, place the end mounting plate 400 at the corresponding positions at both ends of the connection seat 200, align the block 402 on the end mounting plate 400 with the first groove 203 on the connection seat 200, and then push the end mounting plate 400 toward the connection seat 200 so that the block 402 is completely embedded in the groove to achieve the initial positioning of the end mounting plate 400, and then place the side mounting plate 300 at the predetermined positions on both sides of the connection seat 200, so that the thread groove 301 on the side mounting plate 300 is aligned with the bolt hole on the end mounting plate 400. Then, pass the bolt 401 through the end mounting plate 400 and screw it into the thread groove 301. Next, use a wrench to further tighten the bolt 401 to ensure that the connection between the side mounting plate 300 and the end mounting plate 400 and the connection seat 200 is firm and reliable, and place the film capacitor body 600 at the predetermined installation position on the main board 100. The sealing gasket 605 is sleeved on the surface of the bottom plate 601, and then, the pin 603 is aligned with the guide groove 201 on the side mounting plate 300, and the pin 603 is slowly inserted into the guide groove 201 until the pin 603 is fully inserted. During the insertion process, the elastic sheet 503 will automatically fit the side of the pin 603 under the action of the spring 2 501, ensuring good contact between the pin 603 and the electrode strip 202. At the same time, the convex strip 304 at the bottom of the plug board 602 will automatically snap into the second groove 604 on the side mounting plate 300, realize the positioning of the plug board 602, ensure the tight connection between the plug board 602 and the pin 603, and make the bottom end of the sealing gasket 605 abut against the top of the side mounting plate 300 and the end mounting plate 400. After the film capacitor body 600 is installed, according to the actual situation, by rotating the screw 306, adjust the pressure of the pressing plate 303 on the plug board 602, so that the contact resistance between the pin 603 and the electrode strip 202 reaches the best state. Then, evenly apply thermal conductive silicone grease 204 to the bottom of the connection base 200 to improve the heat dissipation effect. Finally, insert the mounting bolt 702 into the long through slot 701, and fix the mounting bolt 702 to the mainboard 100. The setting of the long through slot 701 can achieve fine adjustment of its installation position. After tightening the mounting bolt 702, the installation of the entire multi-pin 603 quick plug-in film capacitor connection structure is completed.

[0030] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" 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 or an electrical connection; 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, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-pin quick-plug film capacitor connection structure, comprising a main board (100), a connection seat (200), a side mounting plate (300), an end mounting plate (400) and a film capacitor body (600), characterized in that: The connecting seat (200) is arranged on the upper surface of the main board (100), the number of the side mounting plates (300) is two, and they are respectively located on both sides of the connecting seat (200), the number of the end mounting plates (400) is two, and they are respectively located at both ends of the connecting seat (200), the inner surface of the end mounting plate (400) is fixedly connected with a clamping block (402), both ends of the connecting seat (200) are provided with a first groove (203), the clamping block (402) can be embedded in the inside of the first groove (203), and the end mounting plate (40 0) are threadedly connected with bolts (401) at the four corners, thread grooves (301) are provided at both ends of the side mounting plate (300), the thread grooves (301) are consistent with the model and specifications of the bolts (401), the film capacitor body (600) is arranged on the top of the end mounting plate (400), the bottom end of the film capacitor body (600) is fixedly connected with a bottom plate (601), the bottom end of the bottom plate (601) is fixedly connected with an insert plate (602), and the bottom end of the insert plate (602) is fixedly connected with a plurality of pins (603).

2. A multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: A gap is designed between the edge mounting plate (300) and the connection seat (200), and the width of the gap between the edge mounting plate (300) and the connection seat (200) is 0.8-1.2 mm, which is used for inserting the pins (603) and the plug board (602).

3. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: A plurality of guide grooves (201) are provided on both side surfaces of the connection seat (200), the number of the guide grooves (201) being the same as the number of the pins (603), the surface of the pins (603) being tin-plated, the inner wall of the guide groove (201) being fixedly connected with an electrode strip (202), the surface of the electrode strip (202) being provided with a metal conductive layer.

4. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: The inner wall of the edge mounting plate (300) is fixedly connected with a mounting groove (307), one side of the mounting groove (307) is provided with a contact piece (500), one side surface of the contact piece (500) is fixedly connected with a second spring (501), one end of the second spring (501) is fixedly connected to the surface of the mounting groove (307), and the other side surface of the contact piece (500) is provided with an elastic piece (503), the elastic piece (503) is made of phosphor bronze and has a thickness of 0.2 mm, and the elastic piece (503) is tightly pressed against the side surface of the pin (603).

5. The multi-pin quick-plug film capacitor connection structure according to claim 4, characterized in that: The top and bottom ends of the side surfaces of the abutting piece (500) close to the elastic piece (503) are both fixedly connected with clamping joints (502), and are respectively clamped with the top and bottom ends of the elastic piece (503).

6. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: A trapezoidal guide bar (302) is fixedly connected to the top of the inner wall of the edge mounting plate (300), a pressure plate (303) is arranged below the trapezoidal guide bar (302), a convex strip (304) is fixedly connected to the bottom end of the pressure plate (303), a second groove (604) is provided on the side of the plug plate (602), the convex strip (304) can be snapped into the inside of the second groove (604), a spring 1 (305) is fixedly connected to the side of the pressure plate (303), the other end of the spring 1 (305) is fixedly connected to the inner wall surface of the edge mounting plate (300), a tightening screw (306) is threadedly connected to the surface of the edge mounting plate (300), and the end of the tightening screw (306) is in contact with the side of the pressure plate (303).

7. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: The outer edge of the bottom end of the side mounting plate (300) is fixedly connected to a mounting strip (700), a long through slot (701) is provided on the surface of the mounting strip (700), and a mounting bolt (702) is inserted into the interior of the long through slot (701).

8. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: The bottom end of the connection seat (200) is provided with thermal conductive silicone grease (204).

9. The multi-pin quick-plug film capacitor connection structure according to claim 1, characterized in that: A sealing gasket (605) is sleeved on the surface of the bottom plate (601), and the bottom end of the sealing gasket (605) abuts against the top ends of the side mounting plate (300) and the end mounting plate (400).

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