Insulated gate bipolar transistor (IGBT) module positioning tool capable of preventing pin damage

Abstract

The utility model discloses an IGBT (Insulated Gate Bipolar Translator) module positioning tool for preventing a pin from being damaged, relates to the technical field of IGBT modules, and aims to solve the problems that the IGBT module is easy to slightly shake, the pin of the IGBT module is damaged and the practicability is low when a screw is screwed in the background technology, and the following scheme is provided: the IGBT module positioning tool comprises a positioning plate, four connecting mechanisms are arranged at the bottom of the positioning plate, each connecting mechanism comprises a connecting rod and a limiting ring, and limiting mechanisms are arranged on the two sides of the positioning plate; the limiting mechanism comprises a mounting plate connected to the outer wall of one side of the positioning plate through a bolt, a lead screw penetrating through and screwed to the outer wall of one side of the mounting plate, a limiting plate connected to the outer wall of one end of the lead screw through a bearing, and a connecting column fixedly arranged on the outer wall of the top of the limiting plate. According to the utility model, when the IGBT module is positioned and installed, the IGBT module can be fixed, so that pin damage caused by shaking of the IGBT module when a screw is screwed is prevented, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of IGBT module technology, and in particular to a positioning fixture for IGBT modules to prevent pin damage. Background Technology

[0002] IGBT modules, or Insulated Gate Bipolar Transistors, are composite fully controllable voltage-driven power semiconductor devices composed of BJTs (Bipolar Junction Transistors) and MOS (Metal-Oxide-Semiconductor Field-Effect Transistors). They combine the advantages of high input impedance of MOSFETs and low on-state voltage drop of GTRs. When installing IGBT modules, screws are used to install the IGBT module and the PCB board, and then the pins of the IGBT module are soldered.

[0003] A search revealed a Chinese patent (application number "202222156334.0") disclosing "a positioning fixture for soldering IGBT modules on a PCB board." This positioning fixture includes a fixture base, a fixture body mounted on the base, a module placement slot on the top surface of the fixture body, and a flip clamp assembly and a quick clamp assembly at opposite ends of the top surface of the fixture body. The flip clamp assembly includes a support fixedly mounted on the outer wall of one end of the fixture body, a flip pressure plate rotatably mounted on the support via a pivot, and several adjusting grooves and several stepped holes on the same side of the flip pressure plate. Several pressure posts are slidably mounted in the adjusting grooves, and a clamping rod assembly is movably mounted in the stepped holes. However, during use, when positioning and installing the IGBT module using this positioning fixture, tightening the screws can easily cause slight shaking of the IGBT module, resulting in damage to the IGBT module's pins, thus reducing its practicality. Utility Model Content

[0004] This invention provides a positioning fixture for IGBT modules to prevent pin damage, solving the problem that the positioning fixture proposed in the prior art is prone to slight shaking of the IGBT module when the screws are tightened during positioning and installation, resulting in pin damage and low practicality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A positioning fixture for an IGBT module to prevent pin damage includes a positioning plate. The bottom of the positioning plate has four connecting mechanisms, each including a connecting rod and a limiting ring. Limiting mechanisms are provided on both sides of the positioning plate. Each limiting mechanism includes a mounting plate bolted to the outer wall of one side of the positioning plate, a lead screw threaded through and screwed to the outer wall of the mounting plate, a limiting plate connected to the outer wall of one end of the lead screw via a bearing, and a connecting post fixed to the outer wall of the top of the limiting plate. The positioning plate also has several fixing mechanisms, each including a fixing plate bolted to the outer wall of the top of the positioning plate, a screw threaded through and screwed to the outer wall of the bottom of the fixing plate, and a fixing block.

[0007] Preferably, two operating holes are opened on the outer walls of both sides of the top of the positioning plate, and two sliding grooves are opened on the outer wall of the top of the positioning plate between the two operating holes.

[0008] Preferably, the connecting rod is bolted to the bottom outer wall of the positioning plate, and the limiting ring is bonded to the lower outer wall of the connecting rod.

[0009] The above method involves placing multiple IGBT modules on a PCB board, then using four connecting rods to pass through the through holes of the IGBT modules on both sides of the PCB board, and simultaneously using four rubber limiting rings to contact the IGBT modules to achieve overall positioning.

[0010] Preferably, the connecting column is slidably installed in the groove, and a limit block is bolted to the outer wall of the top of the connecting column.

[0011] Preferably, the fixing block is connected to the lower outer wall of the screw via a bearing, and a rubber pad is adhered to the outer wall of the fixing block.

[0012] Preferably, two limiting rods are fixed on the top outer wall of the fixing block, and the two limiting rods are respectively inserted through and slidably installed on the top outer wall of the fixing plate.

[0013] The above scheme uses a lead screw to rotate and move a limiting plate. The limiting plate contacts the IGBT module in the middle of the PCB board, so that the through hole on the IGBT module matches the through hole on the PCB board. Then, the screw is rotated to make the fixing block descend and contact the edge of the PCB board, thereby limiting the entire position.

[0014] The beneficial effects of this utility model are as follows:

[0015] The lead screw rotates, causing the limiting plate to move. The limiting plate contacts the IGBT module in the middle position on the PCB board, so that the through hole on the IGBT module matches the through hole position on the PCB board. Then, the screw is rotated, causing the fixing block to descend and contact the edge of the PCB board, thereby limiting the overall position. This can fix the IGBT module during positioning and installation, preventing the IGBT module from shaking and damaging the pins when tightening the screws, thus improving practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall main structure of a positioning fixture for an IGBT module that prevents pin damage, as proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of the positioning plate of the positioning fixture for preventing pin damage of an IGBT module proposed in this utility model.

[0018] Figure 3 This is a front view schematic diagram of the connection mechanism of a positioning fixture for an IGBT module that prevents pin damage, as proposed in this utility model.

[0019] Figure 4 This is a front view schematic diagram of the limiting mechanism of a positioning fixture for an IGBT module that prevents pin damage, as proposed in this utility model.

[0020] Figure 5 This is a front view schematic diagram of the fixing mechanism of a positioning fixture for an IGBT module to prevent pin damage, as proposed in this utility model.

[0021] Figure 6 This is a schematic diagram of the positioning fixture for an IGBT module that prevents pin damage, as proposed in this utility model, used to position the IGBT module and the PCB board.

[0022] In the diagram: 1. Positioning plate; 11. Operating hole; 12. Slide groove; 2. Connecting mechanism; 201. Connecting rod; 202. Limiting ring; 3. Limiting mechanism; 301. Mounting plate; 302. Screw; 303. Limiting plate; 304. Connecting column; 305. Limiting block; 4. Fixing mechanism; 401. Fixing plate; 402. Screw; 403. Fixing block; 5. Limiting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1, referring to Figure 1-3 and Figure 6 A positioning fixture for an IGBT module to prevent pin damage includes a positioning plate 1. Two operation holes 11 are opened on the outer walls of both sides of the top of the positioning plate 1. Two sliding grooves 12 are opened on the outer wall of the top of the positioning plate 1 between the two operation holes 11. Four connecting mechanisms 2 are provided at the bottom of the positioning plate 1. The connecting mechanism 2 includes a connecting rod 201 and a rubber limiting ring 202. The connecting rod 201 is connected to the bottom outer wall of the positioning plate 1 by bolts, and the limiting ring 202 is bonded to the lower outer wall of the connecting rod 201.

[0025] Example 2, refer to Figure 4-6 A positioning fixture for an IGBT module to prevent pin damage includes two limiting mechanisms 3. Each limiting mechanism 3 includes a mounting plate 301 bolted to one side of the outer wall of a positioning plate 1, a lead screw 302 threaded through and bolted to one side of the outer wall of the mounting plate 301, a limiting plate 303 connected to one end of the lead screw 302 via a bearing, and a connecting post 304 fixed to the top outer wall of the limiting plate 303. The connecting post 304 is slidably installed in a slide groove 12, and a limiting plate 304 is bolted to the top outer wall of the connecting post 304. Positioning block 305, positioning plate 1 is provided with several fixing mechanisms 4, fixing mechanism 4 includes fixing plate 401 connected to the top outer wall of positioning plate 1 by bolts, screw rod 402 passing through and screwed to the bottom outer wall of fixing plate 401 and fixing block 403, fixing block 403 is connected to the lower outer wall of screw rod 402 by bearing, rubber pad is adhered to the outer wall of fixing block 403, two limiting rods 5 are fixed on the top outer wall of fixing block 403, and the two limiting rods 5 pass through and slide on the top outer wall of fixing plate 401 respectively.

[0026] Working principle: Multiple IGBT modules are placed on a PCB board. Then, four connecting rods 201 pass through the through holes of the IGBT modules on both sides of the PCB board, and the four connecting rods 201 pass through the through holes of the PCB board. At the same time, four rubber limiting rings 202 contact the IGBT modules to achieve overall positioning. The lead screw 302 rotates to drive the limiting plate 303 to move. The limiting plate 303 contacts the IGBT module in the middle position on the PCB board, so that the through hole on the IGBT module matches the through hole position on the PCB board. Then, the screw 402 is rotated to make the fixing block 403 descend and contact the edge of the PCB board, thereby limiting the overall position.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A positioning fixture for an IGBT module to prevent pin damage, comprising a positioning plate (1), characterized in that, The bottom of the positioning plate (1) is provided with four connecting mechanisms (2), and the connecting mechanism (2) includes a connecting rod (201) and a limiting ring (202); The positioning plate (1) is provided with limiting mechanisms (3) on both sides. The limiting mechanism (3) includes a mounting plate (301) connected to the outer wall of one side of the positioning plate (1) by bolts, a screw rod (302) passing through and screwed to the outer wall of one side of the mounting plate (301), a limiting plate (303) connected to the outer wall of one end of the screw rod (302) by bearings, and a connecting column (304) fixed to the top outer wall of the limiting plate (303). The positioning plate (1) is provided with several fixing mechanisms (4), and the fixing mechanism (4) includes a fixing plate (401) that is bolted to the top outer wall of the positioning plate (1), a screw (402) that passes through and is screwed to the bottom outer wall of the fixing plate (401), and a fixing block (403).

2. The positioning fixture for preventing pin damage of an IGBT module according to claim 1, characterized in that, The positioning plate (1) has two operating holes (11) on both sides of the top outer wall, and two sliding grooves (12) are opened on the top outer wall between the two operating holes (11).

3. The positioning fixture for preventing pin damage of an IGBT module according to claim 1, characterized in that, The connecting rod (201) is bolted to the bottom outer wall of the positioning plate (1), and the limiting ring (202) is bonded to the lower outer wall of the connecting rod (201).

4. The positioning fixture for an IGBT module to prevent pin damage according to claim 2, characterized in that, The connecting column (304) is slidably installed in the slide groove (12), and a limit block (305) is bolted to the top outer wall of the connecting column (304).

5. The positioning fixture for an IGBT module to prevent pin damage according to claim 1, characterized in that, The fixing block (403) is connected to the lower outer wall of the screw (402) by a bearing, and a rubber pad is adhered to the outer wall of the fixing block (403).

6. The positioning fixture for an IGBT module to prevent pin damage according to claim 1, characterized in that, Two limiting rods (5) are fixed on the top outer wall of the fixing block (403), and the two limiting rods (5) are respectively inserted through and slidably installed on the top outer wall of the fixing plate (401).

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