An inverter power device assembly tool
Patent Information
- Application Number
- CN202522012298.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-18
AI Technical Summary
[0004]本实用新型为解决现有逆变器的功率器件安装在PCB板上时难以对其两者之间的安装孔位，并且在将安装有功率器件的PCB板安装在散热器上时，PCB板与散热器之间的间距和水平度很难控制，造成操作困难、间距和水平度不一、产品的一致性差，影响美观及后续工序的问题，提供一种逆变器功率器件装配工装，通过在将初步安装过功率器件的PCB板装在工装上，调整功率器件位置使安装孔位对其，随后对PCB板、功率器件的相对位置进行固定，随后焊接固定功率器件的引脚与PCB板，保证安装时，功率器件与PCB板的安装孔位相互对齐，并且PCB板与散热器之间的间距和水平度，操作简单，安装后的产品一致性好
本实用新型在将功率器件与PCB板安装在散热器上之前，首先通过安装底板作为散热器的替代进行安装前准备，首先将功率器件引脚穿过PCB板的穿孔，随后选择相应尺寸的第一限位支撑块和第二限位支撑块，通过第一凸台高度对PCB板高度进行限定，随后将多个第一限位支撑块和第二限位支撑块固定安装在安装底板上，随后将PCB板卡设在多个第一限位支撑块和第二限位支撑块之间进行周向及高度的限位，随后通过螺丝刀或其它杆状件穿过PCB板上的安装孔后波动功率器件位置，使得PCB板上的安装孔、功率器件安装孔以及安装底板上的调节螺孔上下对应，随后将螺栓依次穿过PCB板上的安装孔、功率器件安装孔后与对应调节螺孔螺纹连接，实现对PCB板与功率器件的相对位置限位，随后电烙铁焊接功率器件各引脚与PCB板上穿孔位置，随后即可拆出已连接在一起的功率器件和PCB板，将其安装在对应散热器上即可；
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Figure CN224670041U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of inverter assembly technology, specifically relating to an inverter power device assembly fixture. Background Technology
[0002] During the assembly of power devices (rectifier bridge module, IGBT) on the PCB board, the inverter needs to be aligned with the mounting holes and fixed on the heat sink. After adjusting the horizontal distance between the PCB board and the heat sink, it is then soldered with a soldering iron.
[0003] In this assembly method, it is not easy to align and fix the mounting holes of the power devices with the mounting holes of the heat sink during the assembly process. It is also difficult to control the spacing and levelness between the PCB board and the heat sink, resulting in operational difficulties, inconsistent spacing and levelness, poor product consistency, and affecting the aesthetics and subsequent processes. Summary of the Invention
[0004] This invention addresses the challenges of aligning the mounting holes of power devices on a PCB board in existing inverters, and the difficulty in controlling the spacing and levelness between the PCB board and the heatsink when mounting the PCB board with the power devices onto the heatsink. These issues lead to operational difficulties, inconsistent spacing and levelness, poor product consistency, and negatively impacted aesthetics and subsequent processes. The invention provides an inverter power device assembly fixture. By mounting a PCB board with pre-installed power devices onto the fixture, adjusting the position of the power devices to align the mounting holes, and then fixing the relative positions of the PCB board and power devices, the pins of the power devices are soldered to the PCB board. This ensures that during installation, the mounting holes of the power devices and the PCB board are aligned, and the spacing and levelness between the PCB board and the heatsink are consistent. The process is simple, and the assembled product exhibits good consistency.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An inverter power device assembly fixture for mounting and positioning power devices and a PCB board includes a mounting base plate and a limiting assembly. The mounting base plate includes a top plate and two support plates. The top plate is fixedly disposed between the upper ends of the two opposing support plates, and the two support plates and the top plate together form an inverted U-shaped plate structure. Multiple power devices are mounted on the top plate, and a PCB board is disposed above the power devices. A limiting assembly is disposed on the top plate. The limiting assembly includes multiple first limiting support blocks disposed opposite to both sides of the PCB board and a second limiting support block located at one end of the PCB board. Both the first and second limiting support blocks include a base block, a first boss, and a second boss. The upper side of the base block is fixedly disposed... A first boss is fixedly provided, and a second boss is fixedly provided on the upper side of the first boss. The bottom block, the first boss, and the second boss together form a stepped structure. The PCB board is located on the upper side of multiple first bosses and between multiple second bosses. Multiple adjusting screw holes are provided on the top plate. The adjusting screw holes correspond to the mounting holes of multiple power devices and the mounting holes of the PCB board. The mounting base plate is used to replace the heat sink for pre-installation adjustment. The position of the PCB board is defined by multiple second bosses. The distance between the PCB board and the heat sink is ensured by multiple first bosses during subsequent installation. Screwdrivers or other rod-shaped devices are inserted through the mounting holes on the PCB board to adjust the relative position of the PCB board and the power devices.
[0006] Preferably, the power devices are a rectifier bridge module and an IGBT module.
[0007] Preferably, both the first limiting support block and the second limiting support block are fixedly connected to the top plate by the first bolt. The position or number of the corresponding limiting support blocks can be adjusted to accommodate PCBs of different specifications and the spacing between the PCB and the heat sink.
[0008] Preferably, each of the bottom blocks has a limit hole extending through it vertically, and the top plate has multiple limit screw holes corresponding to the limit holes vertically. The first bolt passes through the limit hole and is threaded into the limit screw hole. The first bolt is used to fix the limit support block and the mounting base plate.
[0009] Preferably, the pins of the power device pass through corresponding through holes on the PCB board.
[0010] Preferably, the bottom block, the first boss, and the second boss of the first or second limiting support block are integrally formed to ensure forming strength and precision, and to avoid errors in the position adjustment and limiting of the PCB board.
[0011] Preferably, the top plate and the support plate of each of the mounting base plates are integrally formed.
[0012] Preferably, the pins of the IGBT module are bent at 90° and then pass through corresponding through holes on the PCB board.
[0013] The beneficial effects of this utility model through the above technical solution are as follows: Before mounting the power device and PCB board onto the heat sink, this invention first uses a mounting base plate as a substitute for the heat sink for pre-installation preparation. First, the power device pins are passed through the through holes in the PCB board. Then, first and second limiting support blocks of appropriate sizes are selected, and the height of the PCB board is limited by the height of the first boss. Multiple first and second limiting support blocks are then fixedly mounted on the mounting base plate. The PCB board is then positioned between the multiple first and second limiting support blocks for circumferential and height limiting. Next, a screwdriver or other rod-like object is passed through the mounting holes on the PCB board and adjusted to position the power device, ensuring that the mounting holes on the PCB board, the power device mounting holes, and the adjusting screw holes on the mounting base plate are aligned vertically. Bolts are then passed through the mounting holes on the PCB board and the power device mounting holes and threaded into the corresponding adjusting screw holes to limit the relative position of the PCB board and the power device. Finally, a soldering iron is used to solder the power device pins to the through holes on the PCB board. The connected power device and PCB board can then be removed and installed onto the corresponding heat sink. The mounting base plate and multiple first and second limiting support blocks of this utility model provide positioning, ensuring the relative position between the power device and the PCB board is determined and easy to weld. This also ensures that the power device will not be tilted on the PCB board when it is installed on the heat sink. It effectively limits the horizontality and height between the PCB board and the heat sink, ensuring product consistency, improving the assembly efficiency of inverter power devices (rectifier bridge module, IGBT), guaranteeing product quality, facilitating operation, and accelerating the work progress. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 This is a schematic diagram of the structure of the present invention, showing multiple limiting support blocks installed on the mounting base plate.
[0016] Figure 3 This is a schematic diagram of the mounting base plate of this utility model.
[0017] Figure 4 This is a schematic diagram of the structure of the first limiting support block of this utility model.
[0018] Figure 5 This is a schematic diagram of the PCB board described in this utility model.
[0019] Figure 6 This is a schematic diagram of the rectifier bridge module described in this utility model.
[0020] Figure 7 This is a schematic diagram of the IGBT module described in this utility model.
[0021] Figure 8 This is a schematic diagram of the connection between the power device and the PCB board of this utility model. Figure 1 .
[0022] Figure 9 This is a schematic diagram of the connection between the power device and the PCB board of this utility model. Figure 2 .
[0023] Figure 10 This is a schematic diagram of the structure of this utility model that uses a limiting support block to limit the position of the PCB board. Figure 1 .
[0024] Figure 11 This is a schematic diagram of the structure of this utility model that uses a limiting support block to limit the position of the PCB board. Figure 2 .
[0025] In the attached diagram, the numbers are: 1 for power devices, 11 for rectifier bridge modules, and 12 for IGBT modules; 2 is the PCB board, 3 is the mounting base plate, 31 is the top plate, 32 is the support plate, 33 is the adjusting screw hole, and 34 is the limiting screw hole; 4 is a limiting support block, 41 is a first limiting support block, 411 is a bottom block, 412 is a first boss, 413 is a second boss, 414 is a limiting hole, and 42 is a second limiting support block. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 11 As shown, this embodiment provides an inverter power device assembly fixture for the installation and positioning of the power device 1 and the PCB board 2. Specifically, it is used to pre-adjust and connect the relative position and connection between the power device 1 and the PCB board 2 before the power device 1 is installed, ensuring the subsequent installation quality and the flatness of the PCB board. It includes a mounting base plate 3 and a limiting component 4, such as... Figure 2 As shown, the mounting base 3 includes a top plate 31 and two support plates 32. The top plate 31 is fixedly installed between the upper ends of the two opposing support plates 32. The two support plates 32 and the top plate 31 together form an inverted U-shaped plate structure. The top plate 31 and the support plates 32 of the mounting base 3 are integrally formed. The mounting base 3 is used to simulate a heat sink and to simulate the installation of the power device 1 in advance, thereby ensuring that the relative position between the power device 1 and the PCB board 2 is consistent and avoiding skewing.
[0027] The top plate 31 is provided with a limiting component 4. The limiting component 4 includes a plurality of first limiting support blocks 41 disposed opposite to both sides of the PCB board 2 and a second limiting support block 42 located at one end of the PCB board 2. The PCB board 2 is positioned and limited by the plurality of first limiting support blocks 41 and second limiting support blocks 42, while ensuring the horizontality and height of the PCB board 2 when it is subsequently installed on the heat sink.
[0028] Multiple power devices 1 are mounted on the top plate 31. The power devices 1 are rectifier bridge modules 11 and IGBT modules 12. A PCB board 2 is mounted above the power devices 1. The pins of the power devices 1 pass through corresponding through holes on the PCB board 2. Specifically, the pins of the rectifier bridge module 11 pass through corresponding through holes on the PCB board 2, and the pins of the IGBT module 12 are bent at 90° and then pass through corresponding through holes on the PCB board 2. This pre-sets the relative positions of the power devices 1 and the PCB board 2, preparing for subsequent calibration of the relative positions.
[0029] Both the first limiting support block 41 and the second limiting support block 42 include a base block 411, a first protrusion 412, and a second protrusion 413. The first protrusion 412 is fixedly disposed on the upper side of the base block 411, and the second protrusion 413 is fixedly disposed on the upper side of the first protrusion 412. The base block 411, the first protrusion 412, and the second protrusion 413 together form a stepped structure. The PCB board 2 is located on the upper side of the multiple first protrusions 412 and between the multiple second protrusions 413. The multiple first protrusions 412 limit the distance between the PCB board 2 and the upper side of the top plate 31, thereby ensuring the height between the subsequent PCB board and the heat sink, and ensuring the horizontality of the subsequent PCB board 2 installed on the heat sink. The multiple second protrusions 413 ensure the limiting of the PCB board 2.
[0030] Each of the first limiting support block 41 and the second limiting support block 42 is fixedly connected to the top plate 31 by a first bolt. Each of the bottom blocks 411 has a limiting hole 414 extending vertically. The top plate 31 has a plurality of limiting screw holes 34 corresponding vertically to the limiting holes 414. After the first bolt passes through the limiting hole 414, it is threadedly connected to the limiting screw hole 34. The bottom block 411 and the top plate 31 are fixedly connected by the first bolt, thereby realizing the fixed connection between the plurality of first limiting support blocks 41 and the second limiting support blocks 42 and the mounting base plate 3.
[0031] The top plate 31 has multiple adjusting screw holes 33, which correspond vertically to the mounting holes of multiple power devices 1 and the mounting holes of the PCB board 2. By passing a screwdriver or other rod-like structure through the mounting holes on the PCB board 2, the position of the power device 1 can be adjusted so that the mounting holes of the PCB board 2 and the mounting holes of the power device 1 are vertically aligned, thereby adjusting the relative position of the PCB board 2 and the power device 1. Subsequently, by passing corresponding bolts through the mounting holes of the PCB board 2 and the mounting holes of the power device 1 and threading them into the corresponding adjusting screw holes 33, the relative position of the PCB board 2 and the power device 1 is fixed, ensuring the soldering and fixing of the pins of the power device 1 to the corresponding through holes on the PCB board 2.
[0032] The bottom block 411, the first boss 412, and the second boss 413 of each of the first limiting support block 41 or the second limiting support block 42 are integrally formed.
[0033] Before installing the power device 1 and PCB board 2 onto the heat sink, prepare for installation by using the mounting base plate 3 as a substitute for the heat sink. Pass the pins of the power device 1 through the corresponding through holes in the PCB board 2. Then, select the appropriate size first limiting support block 41 and second limiting support block 42. Limit the height of the PCB board 2 by selecting or machining the height of the first boss 412. Then, fix multiple first limiting support blocks 41 and second limiting support blocks 42 onto the mounting base plate 3. Next, clamp the PCB board 2 between the multiple first limiting support blocks 41 and second limiting support blocks 42 for circumferential and height limitation. Finally, use a screwdriver or other tool to... After the rod-shaped part passes through the mounting hole on the PCB board 2, it moves the position of the power device 1 so that the mounting hole on the PCB board 2, the mounting hole of the power device 1, and the adjusting screw hole 33 on the mounting base plate 3 are aligned vertically. Then, the bolts are passed through the mounting holes on the PCB board 2 and the mounting hole of the power device 1 in sequence and threaded into the corresponding adjusting screw holes 33 to fix the relative position of the PCB board 2 and the power device 1. Then, the soldering iron is used to solder the contact positions of each pin of the power device 1 with the through holes on the PCB board 2. The position of the PCB board 2 is adjusted with a screwdriver to make it snap into the fixture. Then, the power device 1 and the PCB board 2 that have been connected together can be removed and installed on the corresponding heat sink.
[0034] It should be noted that after the height of the first boss 412 is used to limit the distance between the PCB board 2 and the lower side of the power device 1, the height of the PCB board 2 and the subsequent installation on the heat sink is essentially achieved. At the same time, when the PCB board 2 and the power device 1 are subsequently installed on the heat sink, the PCB board 2 is fixed according to the set preload force, thereby ensuring the horizontality of the PCB board 2 installation.
[0035] An inverter power device assembly method, implemented using the aforementioned inverter power device assembly fixture, includes the following steps: Step 1: Clean the surface of the mounting base plate and the limiting components to ensure that there are no foreign objects on the surface; First, wipe the surface of the tool with a clean cotton cloth, then blow it clean with an air pump.
[0036] Step 2: Bend the pins of the IGBT module 90° towards the front. Step 3: Insert the pins of the power device IGBT module and rectifier bridge module into the corresponding through holes on the PCB board 2, and then place the PCB board 2 on the upper side of multiple first protrusions 412 and limit it by multiple second protrusions 413. Step 4: After passing a screwdriver through the mounting holes on PCB board 2, adjust the mounting position of the power device, fix the position of the power device 1 with bolts (or screws), and then adjust the position of PCB board 2 with a screwdriver. After passing through the mounting holes on PCB board 2 and the mounting holes of power device 1, bolts (or screws) are threaded into the corresponding adjusting screw holes 33 to fix the position of power device 1.
[0037] Step 5: Use a soldering iron to solder one pin of the power device. After soldering, remove the fixing bolts of each power device and cut off any excess pins. Step 6: Install the removed PCB board 2 and power device 1 onto the corresponding heat sink.
[0038] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. An inverter power device assembly fixture for mounting and positioning power devices (1) and a PCB board (2), characterized in that, It includes a mounting base plate (3) and a limiting component (4). The mounting base plate (3) includes a top plate (31) and two support plates (32). The top plate (31) is fixedly installed between the upper ends of the two oppositely arranged support plates (32). The two support plates (32) and the top plate (31) together form an inverted U-shaped plate structure. The top plate (31) is provided with a plurality of power devices (1), and a PCB board (2) is provided above the power devices (1). The top plate (31) is provided with a limit assembly (4). The limit assembly (4) includes a plurality of first limit support blocks (41) disposed opposite to each other on both sides of the PCB board (2) and a second limit support block (42) located at one end of the PCB board (2). Both the first limiting support block (41) and the second limiting support block (42) include a bottom block (411), a first boss (412) and a second boss (413). The bottom block (411) is fixedly provided with a first boss (412) on its upper side, and the first boss (412) is fixedly provided with a second boss (413) on its upper side. The bottom block (411), the first boss (412) and the second boss (413) together form a stepped structure. The PCB board (2) is located on the upper side of multiple first bosses (412) and between multiple second bosses (413); The top plate (31) is provided with multiple adjustment screw holes (33), which correspond to the mounting holes of multiple power devices (1) and the mounting holes of the PCB board (2) respectively.
2. The inverter power device assembly fixture according to claim 1, characterized in that, The power device (1) is a rectifier bridge module (11) and an IGBT module (12).
3. The inverter power device assembly fixture according to claim 1, characterized in that, Each of the first limiting support block (41) and the second limiting support block (42) is fixedly connected to the top plate (31) by the first bolt.
4. The inverter power device assembly fixture according to claim 3, characterized in that, Each of the bottom blocks (411) has a limit hole (414) running through it vertically. The top plate (31) has multiple limit screw holes (34) that correspond vertically to the limit holes (414). The first bolt passes through the limit hole (414) and is threaded into the limit screw hole (34).
5. The inverter power device assembly fixture according to claim 1, characterized in that, The pins of the power device (1) pass through corresponding through holes on the PCB board (2).
6. The inverter power device assembly tooling of claim 1, wherein, The bottom block (411), first boss (412), and second boss (413) of each of the first limiting support block (41) or the second limiting support block (42) are integrally formed.
7. The inverter power device assembly tooling of claim 1, wherein, The top plate (31) and the support plate (32) of each of the mounting base plates (3) are integrally formed.
8. The inverter power device assembly tooling of claim 2, wherein, The pins of the IGBT module (12) are bent 90° and then pass through the corresponding through holes on the PCB board (2).