An IGBT power module selection welding fixture for inverters
Patent Information
- Application Number
- CN202621227729.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-10
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2036-08-10
AI Technical Summary
[0004]本实用新型的目的在于提供一种逆变器用IGBT功率模块选择焊用夹持工装，以解决上述背景技术提出传统的功率模块夹持工装组装方式缺乏水平约束，导致功率模块顶部安装不平，散热组件贴合存间隙，降低散热效率及寿命，同时，在后续加工过程中，缺乏对板卡上的敏感部件进行隔离防护，容易因外力磕碰，导致敏感部件损坏的问题
该装置通过压板反向放置，利用第二定位孔与第二定位销套接实现功率模块的快速定位，再经第一安装螺栓固定，将板卡置于功率模块顶部使引脚与插孔准确插接，并经第二安装螺栓和支撑柱与压板固定，有效保证两个功率模块与板卡的水平共面安装，避免焊接倾斜，第一定位销与第一定位孔配合实现整体快速定位安装，夹块在限位螺栓上滑动压缩弹簧后自动复位压紧板卡，既方便取放，又能在焊接中持续提供稳定压紧力，该装置显著提高了锡焊组装效率与质量，确保后续散热组件与功率模块水平紧密贴合，从而大幅提升IGBT功率模组的散热效率；
Smart Images
Figure CN224737453U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of clamping fixture technology, and specifically relates to a clamping fixture for selective welding of IGBT power modules for inverters. Background Technology
[0002] IGBT modules combine the high input impedance and fast switching characteristics of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) with the low on-state voltage drop and high current carrying capacity of BJTs (Bipolar Junction Transistors). This combination makes them an ideal choice for high-voltage converter systems above 600V. They are currently widely used in new energy vehicles, renewable energy power generation, industrial control, and smart grid industries. As these devices are widely used, the corresponding device welding processes also require high reliability.
[0003] Traditional power module clamping fixtures lack horizontal constraints, resulting in uneven installation of the top of the power module and gaps in the heat dissipation components, which reduces heat dissipation efficiency and lifespan. At the same time, in subsequent processing, there is a lack of isolation and protection for sensitive components on the board, which are easily damaged by external impacts. To solve the above problems, we provide a clamping fixture for selective soldering of IGBT power modules for inverters. Utility Model Content
[0004] The purpose of this utility model is to provide a clamping fixture for selective soldering of IGBT power modules for inverters, in order to solve the problem that the traditional power module clamping fixture assembly method mentioned in the background technology lacks horizontal constraints, resulting in uneven installation of the top of the power module, gaps in the heat dissipation components, reduced heat dissipation efficiency and lifespan, and at the same time, in subsequent processing, there is a lack of isolation and protection for sensitive components on the board, which makes them easy to be damaged by external impacts.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a clamping fixture for selective soldering of IGBT power modules for inverters, comprising a tray, a plate placed on top of the tray, a pressure plate placed on top of the plate, two power modules disposed between the plate and the pressure plate, a first mounting bolt sleeved inside the power module, a nut sleeved on top of the pressure plate, one end of the first mounting bolt being threadedly connected to the nut, a plurality of support columns fixedly connected to the bottom of the pressure plate, and a plurality of second mounting columns adapted to the support columns sleeved inside the plate. Mounting bolts, one end of the second mounting bolt is threaded to the support column, the top of the tray has a recessed groove adapted to the plate, the top of the tray has several clamping blocks, the inside of the clamping blocks is fitted with limiting bolts, the surface of the limiting bolts is fitted with springs, the bottom of the limiting bolts is threaded to the tray, the surface of the pressure plate has an arc-shaped groove adapted to the clamping blocks, the inside of the tray has clearance holes adapted to the plate, the inside of the tray is bolted with a protective plate, the bottom of the protective plate is bolted with several protective shells, and the inside of the protective plate has a through groove.
[0006] Preferably, both sides of the bottom of the pressure plate are fixedly connected with first positioning pins, one end of the first positioning pin passes through the plate and is inserted into the tray, the top of the tray is provided with a first positioning hole that matches the first positioning pin, and the inside of the plate is provided with a third positioning hole that matches the first positioning pin.
[0007] Preferably, the nut is provided with a stop at the top, and a fixing bolt is fitted inside the stop, the bottom of which is threadedly connected to the pressure plate.
[0008] Preferably, the power module has a second positioning hole inside, and the bottom of the pressure plate is fixedly connected with a second positioning pin that matches the second positioning hole.
[0009] Preferably, the board has a circular hole inside that matches the first mounting bolt.
[0010] This utility model has the following beneficial effects: This device uses a reversed pressure plate and a second positioning hole and pin to quickly position the power module. The module is then secured with a first mounting bolt, placing the board on top of the power module to ensure accurate pin insertion. The board is then fixed to the pressure plate with a second mounting bolt and support column, effectively ensuring that the two power modules and the board are installed horizontally and coplanarly, preventing tilting during soldering. The first positioning pin and the first positioning hole work together to achieve rapid overall positioning and installation. The clamping block slides on the limit bolt, compresses the spring, and automatically resets to press the board, facilitating easy placement and providing a stable clamping force during soldering. This device significantly improves the efficiency and quality of soldering assembly, ensuring a tight horizontal fit between the subsequent heat dissipation components and the power module, thereby greatly improving the heat dissipation efficiency of the IGBT power module. The device features clearance holes inside the tray that are compatible with the circuit board, effectively preventing interference and collisions with electronic components on the board. A protective plate is bolted inside the tray, and several protective shells are bolted to the bottom of the protective plate, which can isolate and protect sensitive components below, avoiding damage to sensitive components on the circuit board due to external impacts. Attached Figure Description
[0011] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is an exploded view of a partial structure of this utility model; Figure 4 This is an exploded view of a partial structure of this utility model; Figure 5 This is a utility model Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is an exploded view of a partial structure of this utility model.
[0012] Reference numerals: 1. Tray; 2. Plate; 3. Pressure plate; 4. Power module; 5. First mounting bolt; 6. Nut; 7. Support column; 8. Second mounting bolt; 9. First locating pin; 10. First locating hole; 11. Sinking groove; 12. Clamping block; 13. Limiting bolt; 14. Spring; 15. Arc groove; 16. Clearance hole; 17. Protective plate; 18. Protective shell; 19. Stop block; 20. Fixing bolt; 21. Second locating pin; 22. Round hole. Detailed Implementation
[0013] The present invention will be further described in detail below with reference to the accompanying drawings.
[0014] Example 1: refer to Figure 1-6A clamping fixture for selective welding of IGBT power modules for inverters includes a tray 1, a plate 2 placed on top of the tray 1, a pressure plate 3 placed on top of the plate 2, two power modules 4 disposed between the plate 2 and the pressure plate 3, a first mounting bolt 5 fitted inside the power module 4, a nut 6 fitted on top of the pressure plate 3, one end of the first mounting bolt 5 being threadedly connected to the nut 6, several support columns 7 fixedly connected to the bottom of the pressure plate 3, and several second mounting bolts 8 fitted inside the plate 2, each adapted to the support columns 7, one end of the second mounting bolt 8 being threadedly connected to the support column 7. The tray 1 is threaded and has a recessed groove 11 on its top that matches the plate 2. Several clamping blocks 12 are provided on the top of the tray 1. Limiting bolts 13 are fitted inside the clamping blocks 12. Springs 14 are fitted on the surface of the limiting bolts 13. The bottom of the limiting bolts 13 is threadedly connected to the tray 1. The surface of the pressure plate 3 is provided with an arc-shaped groove 15 that matches the clamping blocks 12. The inside of the tray 1 is provided with a clearance hole 16 that matches the plate 2. A protective plate 17 is bolted to the inside of the tray 1. Several protective shells 18 are bolted to the bottom of the protective plate 17. A through groove is provided inside the protective plate 17.
[0015] Specifically, the device uses a reversed pressure plate 3, and utilizes the second positioning hole and second positioning pin 21 to achieve rapid positioning of the power module 4. It is then fixed by the first mounting bolt 5, placing the board 2 on top of the power module 4 so that the pins accurately connect to the sockets. The board 2 is then fixed to the pressure plate 3 by the second mounting bolt 8 and support column 7, effectively ensuring that the two power modules 4 and the board 2 are installed horizontally and coplanarly, avoiding welding tilt. The first positioning pin 9 cooperates with the first positioning hole 10 to achieve rapid overall positioning and installation. The clamping block 12 slides on the limit bolt 13, compresses the spring 14, and then automatically resets to press the board 2, facilitating easy placement and removal. This device can provide stable clamping force during soldering, which significantly improves the efficiency and quality of soldering assembly and ensures that the subsequent heat dissipation components and power module 4 are in close horizontal contact, thereby greatly improving the heat dissipation efficiency of the IGBT power module. By opening avoidance holes 16 inside the tray 1 that are compatible with the board 2, the electronic components on the board 2 can be effectively avoided, preventing interference and collision during assembly. The tray 1 is fitted with a protective plate 17, and several protective shells 18 are fitted to the bottom of the protective plate 17, which can form isolation protection for the sensitive components below, avoiding the problem of damage to the sensitive components on the board 2 due to external impact.
[0016] refer to Figure 3 and Figure 4 Both sides of the bottom of the pressure plate 3 are fixedly connected with first positioning pins 9. One end of the first positioning pin 9 passes through the plate 2 and is inserted into the tray 1. The top of the tray 1 is provided with a first positioning hole 10 that matches the first positioning pin 9. The inside of the plate 2 is provided with a third positioning hole that matches the first positioning pin 9, which enables quick and accurate positioning and assembly.
[0017] refer to Figure 6 The top of the nut 6 is provided with a stop 19, and a fixing bolt 20 is sleeved inside the stop 19. The bottom of the fixing bolt 20 is threadedly connected to the pressure plate 3. By providing a stop 19 on the top of the nut 6 and installing a fixing bolt 20 inside the stop 19 and threadedly connecting it to the pressure plate 3, the stop 19 can limit the upward displacement of the nut 6.
[0018] refer to Figure 3 The power module 4 has a second positioning hole inside, and the bottom of the pressure plate 3 is fixedly connected with a second positioning pin 21 that matches the second positioning hole. By opening a second positioning hole inside the power module 4 and fixing a matching second positioning pin 21 to the bottom of the pressure plate 3, the power module 4 and the pressure plate 3 can be quickly and accurately aligned without repeated manual adjustments, which greatly improves clamping efficiency and positioning consistency.
[0019] refer to Figure 3 The board 2 has a round hole 22 inside that matches the first mounting bolt 5. By providing the round hole 22, it is easy to remove the first mounting bolt 5, and the soldered board 2 and power module 4 can be removed from the pressure plate 3. Brief description of usage: The user places the pressure plate 3 upside down, positions the power module 4 by connecting it to the second positioning pin 21 through the second positioning hole, and then fixes the power module 4 by threading the first mounting bolt 5 to the pressure plate 3. Next, the user places the board 2 on top of the power module 4, inserting the pins of the power module 4 into the sockets of the board 2. The board 2 is then fixed to the pressure plate 3 by the second mounting bolt 8 and the support column 7. The pressure plate 3 is then positioned and installed on the tray 1 by engaging the first positioning pin 9 with the first positioning hole 10. Finally, the user pulls the clamping block 12 to slide on the surface of the limit bolt 13, compressing the spring 14, while simultaneously rotating the clamping block. 12 is reset by spring 14 to press and fix board 2, which facilitates the soldering installation of power module 4 and board 2, and ensures that the two power modules 4 and board 2 are installed horizontally, which facilitates the subsequent horizontal contact installation of heat dissipation components with power modules 4 and improves heat dissipation efficiency. By opening avoidance holes 16 inside the tray 1 to match board 2, the electronic components on board 2 can be effectively avoided, preventing interference and collision during assembly. The tray 1 is bolted with a protective plate 17, and several protective shells 18 are bolted to the bottom of the protective plate 17, which can form isolation protection for the sensitive components below, avoiding the problem of damage to sensitive components on board 2 due to external impact.
[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A clamping fixture for selective soldering of IGBT power modules for inverters, comprising a tray (1), characterized in that: A plate (2) is placed on top of the tray (1), and a pressure plate (3) is placed on top of the plate (2). Two power modules (4) are arranged between the plate (2) and the pressure plate (3). A first mounting bolt (5) is fitted inside the power module (4). A nut (6) is fitted on top of the pressure plate (3). One end of the first mounting bolt (5) is threaded to the nut (6). Several support columns (7) are fixedly connected to the bottom of the pressure plate (3). Several second mounting bolts (8) that are adapted to the support columns (7) are fitted inside the plate (2). One end of the second mounting bolt (8) is threaded to the support column (7). The top of the tray (1) has an opening. A recessed groove (11) adapted to the plate (2) is provided on the top of the tray (1), and several clamping blocks (12) are provided on the top of the clamping blocks (12). A limiting bolt (13) is sleeved inside the clamping blocks (12), and a spring (14) is sleeved on the surface of the limiting bolt (13). The bottom of the limiting bolt (13) is threaded to the tray (1). An arc groove (15) adapted to the clamping blocks (12) is opened on the surface of the pressure plate (3). An avoidance hole (16) adapted to the plate (2) is opened inside the tray (1). A protective plate (17) is bolted inside the tray (1). Several protective shells (18) are bolted to the bottom of the protective plate (17). A through groove is opened inside the protective plate (17).
2. The clamping tool for IGBT power module selection welding of an inverter according to claim 1, characterized in that: The pressure plate (3) has a first positioning pin (9) fixedly connected to both sides of its bottom. One end of the first positioning pin (9) passes through the plate (2) and is inserted into the tray (1). The top of the tray (1) is provided with a first positioning hole (10) that matches the first positioning pin (9). The inside of the plate (2) is provided with a third positioning hole that matches the first positioning pin (9).
3. The clamping fixture for selective welding of IGBT power modules for inverters according to claim 1, characterized in that: The nut (6) is provided with a stop (19) at the top, and a fixing bolt (20) is fitted inside the stop (19). The bottom of the fixing bolt (20) is threadedly connected to the pressure plate (3).
4. The clamping tool for selecting welding of an IGBT power module for an inverter according to claim 1, characterized in that: The power module (4) has a second positioning hole inside, and the bottom of the pressure plate (3) is fixedly connected with a second positioning pin (21) that matches the second positioning hole.
5. The clamping tool for IGBT power module selection welding of an inverter according to claim 1, characterized in that: The inside of the plate (2) is provided with a round hole (22) that is compatible with the first mounting bolt (5).