Sub-subboard connection structure and power electronic device

Abstract

The utility model relates to electronic equipment technical field discloses child -mother board connecting structure and power electronic equipment. Child -mother board connecting structure includes mother board subassembly, subboard subassembly and support frame subassembly. Mother board subassembly includes first electrically conductive plug -in structure, subboard subassembly includes second electrically conductive plug -in structure, and second electrically conductive plug -in structure is adapted with first electrically conductive plug -in structure, support frame subassembly includes first mounting portion and with first mounting portion connected second mounting portion, subboard subassembly and mother board subassembly are inserted and electrically connected through second electrically conductive plug -in structure and first electrically conductive plug -in structure, subboard subassembly and second mounting portion are connected, and are connected with mother board subassembly through first mounting portion. Child -mother board connecting structure provided by the utility model, support frame subassembly can play the supporting effect and bear the stress effect to subboard subassembly, prevent the needle of first electrically conductive plug -in structure and second electrically conductive plug -in structure to produce fatigue, thereby guarantee the reliability of power electronic equipment complete machine.

Description

[0001] Priority Statement

[0002] This application claims priority to Chinese Utility Model Patent No. 2024213953086, filed on June 18, 2024, entitled "Mother-Child Board Connection Structure and Power Electronic Equipment", all contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of electronic equipment technology, specifically to motherboard and power electronic equipment. Background Technology

[0004] Currently, in power electronic equipment, there are conductive connections between PCB boards, such as the connection between the daughter board and the mother board via conductive pins.

[0005] In related technologies, copper busbar sheet metal parts are mainly welded to the daughter board or mother board. However, due to the weight of the components on the daughter board, and the different operating conditions, such as working in vibration environments like vehicles or at sea, pin fatigue can occur due to stress, leading to pin deformation or even breakage. This can cause poor conductive contact or other circuit hazards, significantly impacting the reliability of the entire power electronic equipment. Utility Model Content

[0006] In view of this, the present invention provides a mother-daughter board connection structure and a power electronic device to solve the problems of stress and fatigue of the pins between the daughter board and the mother board.

[0007] In a first aspect, this utility model provides a motherboard-daughterboard connection structure, including a motherboard assembly, a daughterboard assembly, and a support frame assembly. The motherboard assembly includes a first conductive plug-in structure; the daughterboard assembly includes a second conductive plug-in structure, which is adapted to the first conductive plug-in structure; the support frame assembly includes a first mounting portion and a second mounting portion connected to the first mounting portion; the daughterboard assembly and the motherboard assembly are plugged in and electrically connected through the second conductive plug-in structure and the first conductive plug-in structure, and the daughterboard assembly is connected to the second mounting portion and connected to the motherboard assembly through the first mounting portion.

[0008] Beneficial Effects: The motherboard-daughter board connection structure provided by this utility model includes a conductive connection between the second conductive plug-in structure of the daughter board assembly and the first conductive plug-in structure of the motherboard assembly. By providing a support frame assembly, the daughter board assembly connects to the motherboard assembly. Thus, after the daughter board assembly and motherboard assembly are connected, the support frame assembly provides support for the daughter board assembly. When the components on the daughter board are heavy or operating in a vibrating environment, the support frame assembly can withstand stress, preventing fatigue of the pins in the first and second conductive plug-in structures, thereby ensuring the overall reliability of the power electronic equipment.

[0009] In one optional embodiment, the second mounting part is a long strip structure. Along its length, the second mounting part includes a fixed section and a telescopic section. One end of the fixed section is connected to the first mounting part, and the other end of the fixed section is connected to the telescopic section. The fixed section is connected to the sub-board assembly, or the fixed section and the telescopic section are simultaneously connected to the sub-board assembly.

[0010] In one alternative embodiment, the support frame assembly further includes insulated fasteners; along the length direction of the second mounting portion, the fixed section is provided with a plurality of first connecting holes at intervals, and the telescopic section is provided with a plurality of second connecting holes at intervals, the plurality of second connecting holes being adapted to be connected to the plurality of first connecting holes; the fasteners achieve telescopic adjustment by connecting different first connecting holes and second connecting holes.

[0011] In one alternative embodiment, the fixed segment has a limiting groove extending along its length, and at least a portion of the telescopic segment is located within the limiting groove.

[0012] In one alternative embodiment, the support frame assembly further includes a third mounting portion, which is disposed opposite to a second mounting portion, and the third mounting portion and the second mounting portion clamp and fix the sub-plate assembly between them.

[0013] In one alternative embodiment, both the third mounting part and the second mounting part are elongated structures, and the third mounting part, the sub-board assembly, and the second mounting part are connected by insulated fasteners.

[0014] In one alternative embodiment, two support frame assemblies are provided, and the two sides of the sub-plate assembly are respectively connected to the mother plate assembly through the support frame assembly.

[0015] In one alternative embodiment, the sub-board assembly and the motherboard assembly are vertically inserted together, and the fixing sections of the first mounting part and the second mounting part are L-shaped integral components.

[0016] In one alternative embodiment, the motherboard assembly includes a mother PCB board, and the daughterboard assembly includes a daughter PCB board. In the first conductive plug-in structure and the second conductive plug-in structure, one is a Harding terminal male plug-in and the other is a Harding terminal female plug-in.

[0017] Secondly, this utility model also provides a power electronic device, including the mother-daughter board connection structure described in any of the above technical solutions.

[0018] Beneficial effects: Since power electronic equipment includes a motherboard-daughter board connection structure, it has the same effect as the motherboard-daughter board connection structure, which will not be elaborated here. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the front view of a mother-daughter plate connection structure according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 for Figure 1 Side view;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure from a rear view;

[0024] Figure 5 for Figure 1 Top view;

[0025] Figure 6 This is a partial structural diagram of the support frame assembly;

[0026] Figure 7 This is a structural schematic diagram of the telescopic section in the support frame assembly;

[0027] Figure 8 This is a schematic diagram of the overall structure of the support frame assembly;

[0028] Figure 9 This is a structural schematic diagram of the motherboard assembly;

[0029] Figure 10 This is a structural schematic diagram of the sub-board assembly;

[0030] Figure 11 This is a schematic diagram of the assembly process of the sub-board assembly;

[0031] Figure 12 This is a schematic diagram of the front view of a mother-daughter plate connection structure according to an embodiment of the present utility model in a practical application scenario;

[0032] Figure 13 for Figure 12 A schematic diagram of the structure from the rear view.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Motherboard assembly; 11. Mother PCB board; 12. First conductive plug-in structure; 2. Daughterboard assembly; 21. Daughter PCB board; 22. Second conductive plug-in structure; 3. Support frame assembly; 31. First mounting part; 32. Second mounting part; 321. Fixing section; 3211. Limiting groove; 322. Telescopic section; 33. Third mounting part; 34. Fastener; 10. Components. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] The following is combined Figures 1 to 13 The following describes embodiments of the present invention.

[0037] According to an embodiment of the present invention, a mother-daughter board connection structure is provided, including a mother board assembly 1, a daughter board assembly 2, and a support frame assembly 3. The mother board assembly 1 includes a first conductive plug-in structure 12; the daughter board assembly 2 includes a second conductive plug-in structure 22, which is adapted to the first conductive plug-in structure 12; the support frame assembly 3 includes a first mounting portion 31 and a second mounting portion 32 connected to the first mounting portion 31; the daughter board assembly 2 and the mother board assembly 1 are plugged in and electrically connected through the second conductive plug-in structure 22 and the first conductive plug-in structure 12; the daughter board assembly 2 is connected to the second mounting portion 32 and connected to the mother board assembly 1 through the first mounting portion 31.

[0038] The motherboard-daughter board connection structure provided in this embodiment of the utility model includes a second conductive plug-in structure 22 of the daughter board assembly 2 and a first conductive plug-in structure 12 of the mother board assembly 1 that are conductively connected. By providing a support frame assembly 3, the daughter board assembly 2 is connected to the mother board assembly 1. Thus, after the daughter board assembly 2 and the mother board assembly 1 are connected, the support frame assembly 3 can support the daughter board assembly 2. When the components on the daughter board are heavy or operating in a vibrating environment, it can withstand stress and prevent fatigue of the pins of the first conductive plug-in structure 12 and the second conductive plug-in structure 22, thereby ensuring the reliability of the entire power electronic device.

[0039] In some embodiments, the second mounting portion 32 is a long strip structure. Along its length, the second mounting portion 32 includes a fixed section 321 and a telescopic section 322. One end of the fixed section 321 is connected to the first mounting portion 31, and the other end of the fixed section 321 is connected to the telescopic section 322. The fixed section 321 is connected to the sub-board assembly 2, or the fixed section 321 and the telescopic section 322 are simultaneously connected to the sub-board assembly 2.

[0040] Specifically, with Figure 1 As shown in the diagram, the length of the second mounting section 32 corresponds to the height of the sub-board assembly 2. Since the second mounting section 32 includes a fixed section 321 and a telescopic section 322, the overall mounting height of the second mounting section 32 can be adjusted by extending or retracting the telescopic section 322 relative to the fixed section 321, thus accommodating the installation of sub-board assemblies 2 of different sizes. For smaller sub-board assemblies 2, they can be fixed only by the fixed section 321.

[0041] In some embodiments, the support frame assembly 3 further includes an insulated fastener 34; along the length direction of the second mounting portion 32, the fixed section 321 is provided with a plurality of first connecting holes at intervals, and the telescopic section 322 is provided with a plurality of second connecting holes at intervals, the plurality of second connecting holes being adapted to be connected to the plurality of first connecting holes; the fastener 34 achieves telescopic adjustment by connecting different first connecting holes and second connecting holes.

[0042] Specifically, by aligning the second connecting holes at different positions on the telescopic section 322 with the first connecting holes on the fixed section 321, and then fixing them together with fasteners 34, the overall height of the second mounting part 32 can be adjusted. Using fasteners 34 results in a simple structure, low processing cost, and easy disassembly and adjustment. When the size of the sub-plate assembly 2 changes, by altering the connection position between the telescopic section 322 and the fixed section 321, the fixed installation of sub-plate assemblies 2 of different sizes with the mother plate assembly 1 can be achieved.

[0043] Specifically, in some embodiments, both the first connecting hole and the second connecting hole can be configured as threaded holes, and the fastener 34 is a screw or bolt.

[0044] In some embodiments, the fixed segment 321 has a limiting groove 3211 extending along its length direction, and at least a portion of the telescopic segment 322 is located within the limiting groove 3211.

[0045] By setting a limiting groove 3211 in the fixed section 321, the telescopic section 322 can slide within the limiting groove 3211 when the height of the second mounting part 32 is adjusted. The groove wall of the limiting groove 3211 can limit the two sides of the telescopic section 322, thereby ensuring that the telescopic section 322 and the fixed section 321 are on the same vertical line. During installation, the fastener 34 can be installed simply by aligning the first connecting hole of the fixed section 321 and the second connecting hole of the telescopic section 322, which improves the assembly efficiency.

[0046] In some embodiments, the support frame assembly 3 further includes a third mounting portion 33, which is disposed opposite to a second mounting portion 32, and the third mounting portion 33 and the second mounting portion 32 clamp and fix the sub-plate assembly 2 between them.

[0047] Specifically, the third mounting part 33 and the second mounting part 32 are located on opposite sides of the sub-board assembly 2 in the thickness direction. Since the second mounting part 32 includes a fixed section 321 and a telescopic section 322, while the third mounting part 33 is an integral structure, one part of the third mounting part 33 is connected to the fixed section 321, and the other part is connected to the telescopic section 322, thereby fixing the sub-board assembly 2. Furthermore, the length of the third mounting part 33 is adapted to the height of the sub-board assembly 2.

[0048] In some embodiments, the third mounting part 33 and the second mounting part 32 are both elongated structures, and the third mounting part 33, the sub-board assembly 2 and the second mounting part 32 are connected by an insulated fastener 34.

[0049] Specifically, the third mounting part 33 is a long plate-shaped structure. The third mounting part 33, the sub-plate assembly 2, and the second mounting part 32 are all provided with threaded holes. Fasteners 34 are connected in the threaded holes to fasten the three together.

[0050] In some embodiments, there are two support frame assemblies 3, and the two sides of the sub-plate assembly 2 are respectively connected to the mother plate assembly 1 through the support frame assembly 3.

[0051] By setting two support frame assemblies 3, each side of the sub-plate assembly 2 is connected to a support frame assembly 3, such as... Figure 1 As shown, this allows for a more secure fixation of the sub-board assembly 2, improves the support effect of the support frame assembly 3 on the sub-board assembly 2, and better withstands stress, thereby preventing pin fatigue.

[0052] Furthermore, the two support frame assemblies 3 are arranged symmetrically about the sub-plate assembly 2.

[0053] In some embodiments, the sub-board assembly 2 and the motherboard assembly 1 are vertically connected, and the fixing section 321 of the first mounting part 31 and the second mounting part 32 is an L-shaped integral component.

[0054] Specifically, the fixing section 321 of the first mounting part 31 and the second mounting part 32 is an L-shaped integral component, which can serve as a fixed frame located at the bottom. Its horizontal extension is the first mounting part 31, and its vertical extension is the fixing section 321 of the second mounting part 32. Both the fixing section 321 of the first mounting part 31 and the fixing section 321 of the second mounting part 32 are provided with threaded holes. Similarly, the motherboard assembly 1 connected to the first mounting part 31 is also provided with threaded holes. The first mounting part 31 and the motherboard assembly 1 are fastened together by insulated screws. The daughterboard assembly 2 connected to the fixing section 321 of the second mounting part 32 is also provided with threaded holes. The fixing section 321 of the second mounting part 32 and the daughterboard assembly 2 are also fastened together by insulated screws.

[0055] In some embodiments, the motherboard assembly 1 includes a mother PCB board 11, and the daughterboard assembly 2 includes a daughter PCB board 21. In the first conductive plug-in structure 12 and the second conductive plug-in structure 22, one is a Harding terminal male plug-in and the other is a Harding terminal female plug-in.

[0056] Specifically, in this embodiment, such as Figure 11 The daughter board assembly 2 is formed by soldering a daughter PCB board 21 to a Harding terminal male plug. Correspondingly, the mother board assembly 1 is formed by soldering a mother PCB board 11 to a Harding terminal female plug.

[0057] The motherboard-daughter board connection structure provided by this utility model, by setting a support frame assembly 3, can support the daughterboard assembly 2 when the second conductive plug-in structure 22 of the daughterboard assembly 2 and the first conductive plug-in structure 12 of the motherboard assembly 1 are conductively connected. When the components on the daughterboard assembly are heavy or when working in a vibrating environment, it can bear the stress and prevent the pins of the first conductive plug-in structure 12 and the second conductive plug-in structure 22 from fatigue, thereby ensuring the reliability of the entire power electronic equipment.

[0058] This application specification provides a clear and complete description of the utility model. Those skilled in the art can implement the technical solution based on the technical solution described in the specification, obtain the mother-daughter board connection structure, and solve the problems of stress and fatigue of the pins between the daughter board and the mother board. This achieves the technical effect of preventing fatigue of the pins of the first conductive plug-in structure 12 and the second conductive plug-in structure 22, thereby ensuring the reliability of the entire power electronic device.

[0059] It should be noted that the support frame component 3 in the mother-daughter plate connection structure provided by this utility model will not cause the mother plate area to increase, and the mother-daughter plate connection structure does not have a miniaturization requirement in actual application scenarios.

[0060] Specifically, the motherboard dimensions are typically 350mm × 190mm × 2mm. Besides mounting the daughterboard, the motherboard also houses small components such as resistors and capacitors. (Refer to...) Figure 12and Figure 13 These components are typically 50mm x 50mm in size, meeting user requirements for equipment installation and use. Furthermore, since the second mounting section 32 includes a fixed section 321 and a telescopic section 322, the overall mounting height of the second mounting section 32 can be adjusted by extending or retracting the telescopic section 322 relative to the fixed section 321, thus accommodating the installation of sub-board assemblies 2 of different specifications. For smaller sub-board assemblies 2, they can be fixed only by the fixed section 321. Therefore, the first mounting section 31 does not occupy additional space in the motherboard assembly, nor does it affect the installation of other components 10, and the mounting support frame assembly 3 does not cause the motherboard area to increase.

[0061] Even assuming a miniaturization requirement in power electronic devices, the support frame assembly 3 includes a first mounting portion 31 and a second mounting portion 32 connected to the first mounting portion 31. The sub-board assembly 2 is connected to the second mounting portion 32 and to the motherboard assembly 1 via the first mounting portion 31. Both the first mounting portion 31 and the second mounting portion 32 have threaded holes in their fixing sections 321. Similarly, the motherboard assembly 1, corresponding to the first mounting portion 31, also has threaded holes. The first mounting portion 31 and the motherboard assembly 1 are fastened together by insulated screws. Therefore, the first mounting portion 31 of the support frame assembly 3... The mounting part 31 is fastened to the motherboard assembly 1 by screws. The first mounting part 31 only needs to be sized to accommodate the mounting screws, and the mounting screws will not occupy too much area of ​​the first mounting part 31. Therefore, the first mounting part 31 does not need to be too large. Those skilled in the art can adjust the size of the first mounting part 31 according to actual needs, so that while solving the problem of stress and fatigue of the pins between the daughterboard and the motherboard, it does not affect the installation of other components 10. Therefore, the first mounting part 31 will not occupy too much area of ​​the motherboard assembly 1 and will not affect the installation of other components.

[0062] In addition, combined Figure 9 and Figure 10 The second conductive plug structure 22 itself will also occupy a certain area on the motherboard assembly 1. In actual applications, the length of the second conductive plug structure 22 is generally 100mm and the width is generally no more than 20mm. Therefore, the size of the first mounting part 31 can be adjusted according to the actual situation, as long as screws can be installed. Its area on the motherboard assembly 1 is small and will not affect the installation of other components.

[0063] According to an embodiment of the present invention, another aspect provides a power electronic device including the mother-daughter board connection structure described in any of the above embodiments.

[0064] Because power electronic equipment includes a motherboard-daughter board connection structure, it has the same effect as the motherboard-daughter board connection structure, and can solve the pin fatigue problem between the second conductive plug structure 22 of the daughterboard assembly 2 and the first conductive plug structure 12 of the motherboard assembly 1 under vibration conditions. Other effects will not be elaborated here.

[0065] Specifically, power electronic devices include inverters or frequency converters.

[0066] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A mother-daughter plate connection structure, characterized in that, include: Motherboard assembly (1), the motherboard assembly (1) includes a first conductive plug structure (12); Sub-board assembly (2), the sub-board assembly (2) includes a second conductive plug structure (22), the second conductive plug structure (22) being adapted to the first conductive plug structure (12); The support frame assembly (3) includes a first mounting part (31) and a second mounting part (32) connected to the first mounting part (31); The sub-board assembly (2) and the motherboard assembly (1) are connected and electrically conductively by the second conductive plug-in structure (22) and the first conductive plug-in structure (12), and the sub-board assembly (2) is connected to the second mounting part (32) and connected to the motherboard assembly (1) by the first mounting part (31).

2. The mother-daughter plate connection structure according to claim 1, characterized in that, The second mounting part (32) is a long strip structure. Along its length, the second mounting part (32) includes a fixed section (321) and a telescopic section (322). One end of the fixed section (321) is connected to the first mounting part (31), and the other end of the fixed section (321) is connected to the telescopic section (322). The fixed section (321) is connected to the sub-board assembly (2), or the fixed section (321) and the telescopic section (322) are simultaneously connected to the sub-board assembly (2).

3. The mother-daughter plate connection structure according to claim 2, characterized in that, The support frame assembly (3) further includes an insulated fastener (34); along the length direction of the second mounting portion (32), the fixed section (321) is provided with a plurality of first connecting holes at intervals, and the telescopic section (322) is provided with a plurality of second connecting holes at intervals, the plurality of second connecting holes being adapted to be connected to the plurality of first connecting holes; the fastener (34) achieves telescopic adjustment by connecting different first connecting holes and second connecting holes.

4. The mother-daughter plate connection structure according to claim 2 or 3, characterized in that, The fixed section (321) has a limiting groove (3211) extending along its length direction, and at least a portion of the telescopic section (322) is located within the limiting groove (3211).

5. The mother-daughter plate connection structure according to any one of claims 1 to 3, characterized in that, The support frame assembly (3) further includes a third mounting part (33), which is arranged opposite to the second mounting part (32), and the third mounting part (33) and the second mounting part (32) clamp and fix the sub-plate assembly (2) between them.

6. The mother-daughter plate connection structure according to claim 5, characterized in that, Both the third mounting part (33) and the second mounting part (32) are elongated structures. The third mounting part (33), the sub-board assembly (2) and the second mounting part (32) are connected by insulated fasteners (34).

7. The mother-daughter plate connection structure according to claim 6, characterized in that, Two support frame assemblies (3) are provided, and the two sides of the sub-plate assembly (2) are respectively connected to the mother plate assembly (1) through the support frame assembly (3).

8. The mother-daughter plate connection structure according to claim 6, characterized in that, The sub-board assembly (2) and the motherboard assembly (1) are vertically connected by insertion, and the fixing section (321) of the first mounting part (31) and the second mounting part (32) is an L-shaped integral component.

9. The mother-daughter plate connection structure according to any one of claims 1 to 3, characterized in that, The motherboard assembly (1) includes a mother PCB board (11), and the daughterboard assembly (2) includes a daughter PCB board (21). In the first conductive plug-in structure (12) and the second conductive plug-in structure (22), one is a Harding terminal male plug-in and the other is a Harding terminal female plug-in.

10. A power electronic device, characterized in that, The mother-daughter plate connection structure includes any one of claims 1 to 9.

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