Vacuum welding positioning clamp for IGBT (Insulated Gate Bipolar Translator) module

Abstract

The utility model discloses an IGBT module vacuum welding positioning clamp which comprises a supporting table, a limiting groove is formed in the top of the supporting table, a motor is installed below the right side of the supporting table, a two-way threaded rod is connected into the supporting table, the outer sides of the two ends of the two-way threaded rod are sleeved with movable plates, and the two ends of the two-way threaded rod are sleeved with the movable plates. Clamping plates are arranged on the left side and the right side of the supporting table correspondingly, and the outer sides of the shaft ends of the clamping plates are fixedly sleeved with driven gears. According to the vacuum welding positioning clamp for the IGBT module, the two clamping plates rotate relatively, the IGBT module can be pressed and fixed, the IGBT module is prevented from deviating in the welding process, rubber blocks arranged on the clamping plates are utilized, the IGBT module can be flexibly fixed, indentation caused to the IGBT module due to too large pressing force is avoided, and the welding quality of the IGBT module is improved. And the positioning rod moves upwards and penetrates through the positioning hole in the IGBT module, so that the IGBT module can be accurately positioned at a preset position, and the accuracy and consistency during welding are ensured.

Description

Technical Field

[0001] This utility model relates to the field of IGBT module welding technology, specifically to an IGBT module vacuum welding positioning fixture. Background Technology

[0002] In the packaging process of IGBT modules, soldering is a crucial step. To ensure the accuracy and reliability of the soldering, specialized positioning fixtures are needed to secure the IGBT modules and their related components. Especially in vacuum soldering environments, the combined effects of high temperature and vacuum conditions place even higher demands on the stability and precision of the fixtures. However, since IGBT modules are individual, discrete products, ultrasonic soldering requires positioning and securing them. Currently, the positioning and securing methods for IGBT modules are inconvenient and lack stability. To address these shortcomings, existing technologies (applications)... Chinese Patent No. 202123213768.1, with an authorization announcement date of 2022-05-31, discloses a PIN pin welding clamping fixture for IGBT modules. The clamping mechanism, by raising and lowering an upper plate, can clamp or release the IGBT modules placed on the mounting plate. The entire operation is simple and convenient. The positioning pins and blocks ensure precise positioning of the IGBT modules, making placement easier. The guide rod and linear bearing work together to guarantee the running accuracy and straightness of the upper plate during raising and lowering, making the clamping or releasing process of the clamps more stable.

[0003] Existing technology uses a lifting mechanism to move the upper plate up and down to clamp or release the grippers, which can clamp or loosen IGBT modules. However, the grippers themselves are too hard, which may cause deformation of the IGBT module due to excessive clamping force, and may also damage the internal structure of the IGBT module. In addition, it lacks the function of positioning the IGBT module, which may cause the IGBT module to shift during the welding process, resulting in inaccurate welding position. Therefore, we have proposed an IGBT module vacuum welding positioning fixture, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum welding positioning fixture for IGBT modules, which solves the problems mentioned in the background art, such as excessive hardness of the grippers, which may cause deformation of the IGBT module due to excessive clamping force, and damage to the internal structure of the IGBT module, and lack of positioning function for the IGBT module, which may cause the IGBT module to shift during the welding process, resulting in inaccurate welding position.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an IGBT module vacuum welding positioning fixture, including a support platform, a limiting groove on the top of the support platform, and a motor installed on the lower right side of the support platform. It also includes: a bidirectional threaded rod connected internally to the support platform, with movable plates sleeved on the outer sides of both ends of the bidirectional threaded rod; clamping plates on both the left and right sides of the support platform, with driven gears fixedly sleeved on the outer sides of the shaft ends of the clamping plates; rubber blocks on the sides of one end of each of the two clamping plates; positioning rods connected at equal intervals above the bidirectional threaded rod inside the support platform; and connecting plates fixedly connected to one side of the top of each of the two movable plates, with fitting blocks fixed to the top of each connecting plate.

[0006] Preferably, the bidirectional threaded rod bearing is connected inside the support platform, and the right end of the bidirectional threaded rod extends out of the side of the support platform, and the right end of the bidirectional threaded rod is fixedly connected to the output end of the motor.

[0007] Preferably, the threads on the outer sides of both ends of the bidirectional threaded rod have opposite directions, both movable plates are threadedly connected to the bidirectional threaded rod, and both movable plates are arranged in an inverted "L" shape, with the opposite ends of the two movable plates extending out of the outer surface of the support platform.

[0008] Preferably, both clamping plates are hinged to both sides of the support platform, and the rubber block is arranged in a semi-cylindrical shape.

[0009] Preferably, toothed blocks are fixed at equal intervals on the top of the two movable plates, and the driven gear is meshed with the multiple toothed blocks.

[0010] Preferably, all four positioning rods are slidably disposed inside the support platform via sliders, and a return spring is installed between the bottom of the slider and the inner wall of the support platform.

[0011] Preferably, the positioning rod forms an elastic telescopic structure with the support platform through a slider and a return spring, the bottom of the positioning rod is in contact with the top of the bonding block, and the four positioning rods correspond one-to-one with the positioning holes on the IGBT module.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This IGBT module vacuum welding positioning fixture, through the relative rotation of two clamping plates, can press and fix the IGBT module, preventing it from shifting during the welding process. The rubber blocks on the clamping plates provide flexible fixing of the IGBT module, avoiding indentations caused by excessive clamping force. Furthermore, by moving the positioning rod upwards and passing through the positioning hole on the IGBT module, the IGBT module can be accurately positioned in the predetermined position, ensuring accuracy and consistency during welding. The specific details are as follows:

[0013] (1) Place the IGBT module into the limiting groove and drive the bidirectional threaded rod to rotate by the motor, so that the two movable plates move in opposite directions and drive the driven gear to rotate by multiple tooth blocks. At this time, the two clamping plates rotate relative to each other and press and fix the IGBT module in the mounting groove, thereby preventing the IGBT module from moving or deforming during the welding process. Furthermore, the rubber blocks set on the clamping plates can flexibly fix the IGBT module and avoid indentation caused by excessive clamping force.

[0014] (2) When the two movable plates move in opposite directions, they can drive the bonding block to move, so that the bonding block squeezes the positioning rod, causing it to move upward and pass through the positioning hole on the IGBT module, thereby accurately positioning the IGBT module in the predetermined position and ensuring the accuracy and consistency of welding.

[0015] (3) After welding, the motor drives the bidirectional threaded rod to rotate in the opposite direction, so that the two movable plates move relative to each other. At this time, the two clamping plates rotate outward and no longer fix the welded IGBT module. At the same time, the bonding block no longer squeezes the positioning rod, so that the positioning rod is reset under the elastic force of the slider and the return spring, releasing the positioning of the IGBT module, thus making it easy to quickly remove the welded IGBT module. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main cross-section of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the support platform of this utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the clamping plate of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the bidirectional threaded rod and movable plate of this utility model;

[0020] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 This utility model Figure 4 Enlarged structural diagram at point B.

[0022] In the diagram: 1. Support platform; 2. Limiting groove; 3. Bidirectional threaded rod; 4. Movable plate; 5. Clamping plate; 6. Driven gear; 7. Rubber block; 8. Adhesive block; 9. Positioning rod; 10. Connecting plate; 11. Tooth block; 12. Slider; 13. Return spring. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 The present invention provides the following technical solution: a vacuum welding positioning fixture for IGBT modules;

[0025] Example 1: To address the problems in existing technologies where the clamping jaws have excessive hardness, leading to excessive clamping force that may deform the IGBT module and damage its internal structure, and where the lack of IGBT module positioning functionality may cause the IGBT module to shift during welding, resulting in inaccurate welding positions, the following solution is disclosed. Please refer to the following for details. Figures 1-5 As shown, the support includes a support platform 1, with a limiting groove 2 on the top of the support platform 1, and a motor installed on the lower right side of the support platform 1. It also includes: a bidirectional threaded rod 3 connected internally to the support platform 1, with a bearing connecting the bidirectional threaded rod 3 inside the support platform 1, and the right end of the bidirectional threaded rod 3 extending out of the side of the support platform 1. The right end of the bidirectional threaded rod 3 is fixedly connected to the output end of the motor. Movable plates 4 are fitted on the outer sides of both ends of the bidirectional threaded rod 3, with the threads on the outer sides of both ends of the bidirectional threaded rod 3 running in opposite directions. Both movable plates 4 are threadedly connected to the bidirectional threaded rod 3, and both movable plates 4 are inverted "L" shapes. The opposite ends of the two movable plates 4 extend out of the outer surface of the support platform 1. Clamping plates 5 are provided on both the left and right sides of the support platform 1, and driven gears 6 are fixedly fitted on the outer sides of the shaft ends of the clamping plates 5. Tooth blocks 11 are fixed at equal intervals on the top of the two movable plates 4, and the driven gears 6 and multiple tooth blocks 11 are meshed together.

[0026] During use, the operator places the IGBT module to be welded into the limiting groove 2, and drives the bidirectional threaded rod 3 to rotate via a motor, causing the two movable plates 4 to move in opposite directions. Multiple toothed blocks 11 drive the driven gear 6 to rotate, at which point the two clamping plates 5 rotate relative to each other, pressing and fixing the IGBT module in the limiting groove 2 to prevent movement or deformation during welding. After welding is completed, the operator drives the bidirectional threaded rod 3 to rotate in the opposite direction, causing the two movable plates 4 to move relative to each other. Multiple toothed blocks 11 drive the driven gear 6 to rotate in the opposite direction, at which point the two clamping plates 5 rotate outwards, releasing the fixing of the welded IGBT module, making it easier for the operator to remove the welded IGBT module.

[0027] Example 2: Unlike Example 1, this example utilizes the elasticity of the rubber block 7 to flexibly fix the IGBT module, avoiding indentations caused by excessive clamping force. See details... Figures 1-4 As shown, rubber blocks 7 are provided on the side of one end of each of the two clamping plates 5. Both clamping plates 5 are hinged to the two sides of the support platform 1. The rubber blocks 7 are set in a semi-cylindrical shape.

[0028] When the two clamping plates 5 rotate relative to each other and press and fix the IGBT module, the rubber blocks 7 set on the clamping plates 5 can flexibly fix the IGBT module, avoiding indentation caused to the IGBT module due to excessive clamping force.

[0029] Example 3: Unlike Example 2, this example utilizes the upward movement of the positioning rod 9, which passes through the positioning hole on the IGBT module, to position the IGBT module, ensuring accuracy and consistency during welding. See details for further information. Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, positioning rods 9 are connected at equal intervals above the bidirectional threaded rods 3 inside the support platform 1. Connecting plates 10 are fixedly connected to one side of the top of the two movable plates 4, and fitting blocks 8 are fixed to the top of each connecting plate 10. The four positioning rods 9 are slidably set inside the support platform 1 through sliders 12, and a return spring 13 is installed between the bottom of the slider 12 and the inner wall of the support platform 1. The positioning rods 9 form an elastic telescopic structure with the support platform 1 through the slider 12 and the return spring 13. The bottom of the positioning rods 9 fits with the top of the fitting blocks 8. The four positioning rods 9 correspond one-to-one with the positioning holes on the IGBT module.

[0030] When the two movable plates 4 move in opposite directions, they can drive the bonding block 8 to move, causing the bonding block 8 to press against the positioning rod 9, causing it to move upward (the slider 12 moves upward and stretches the return spring 13), and pass through the positioning hole on the IGBT module. This allows the IGBT module to be accurately positioned in the predetermined position, ensuring accuracy and consistency during welding. Then, after welding is completed, the two movable plates 4 move relative to each other, so that the bonding block 8 no longer presses against the positioning rod 9. At the same time, the positioning rod 9 is reset under the elastic force of the slider 12 and the return spring 13, releasing the positioning of the IGBT module, thus facilitating the quick removal of the welded IGBT module.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An IGBT module vacuum welding positioning fixture, comprising a support table (1), a limiting groove (2) is opened in the top of the support table (1), and a motor is installed below the right side of the support table (1), characterized in that, Also includes: The inside of the support table (1) is connected with two-way threaded rod (3), and the outer side of both ends of two-way threaded rod (3) is sleeved with movable plate (4), the left and right sides of the support table (1) are provided with clamping plate (5), and the outer side of the shaft end of clamping plate (5) is sleeved with driven gear (6), the side surface of one end of two clamping plates (5) is provided with rubber block (7), the inside of the support table (1) is connected with positioning rod (9) above two-way threaded rod (3) at equal intervals, one side of the top of two movable plates (4) is fixedly connected with connecting plate (10), and the top of connecting plate (10) is fixedly connected with the top of the fitting block (8).

2. The vacuum-brazing fixture for IGBT modules according to claim 1, characterized in that: The two-way threaded rod (3) is connected in the inside of the support table (1), and the right end of the two-way threaded rod (3) extends out of the side of the support table (1), and the right end of the two-way threaded rod (3) is fixedly connected with the output end of the motor.

3. The vacuum-brazing fixture for IGBT modules of claim 1, wherein: The threads on the outer sides of both ends of the two-way threaded rod (3) are in opposite directions, the two movable plates (4) and the two-way threaded rod (3) are threadedly connected, and the two movable plates (4) are arranged in an inverted "L" shape, and the opposite ends of the two movable plates (4) extend out of the outer surface of the support table (1).

4. The vacuum-brazing fixture for IGBT modules of claim 1, wherein: Both of the clamping plates (5) are hinged to the two sides of the support table (1), and the rubber block (7) is arranged in a semicylindrical shape.

5. The vacuum-brazing fixture for IGBT modules of claim 1, wherein: The top of the two movable plates (4) is fixed with a plurality of tooth blocks (11) at equal intervals, and the driven gear (6) is connected with the plurality of tooth blocks (11).

6. The vacuum-brazing fixture of claim 1, wherein: Four positioning rods (9) are slidably arranged in the inside of the support table (1) through the sliding block (12), and the reset spring (13) is installed between the bottom of the sliding block (12) and the inner wall of the support table (1).

7. The vacuum-brazing fixture of claim 1, wherein: The positioning rod (9) and the support table (1) constitute an elastic telescopic structure through the sliding block (12) and the reset spring (13), the bottom of the positioning rod (9) is fitted with the top of the fitting block (8), and the four positioning rods (9) and the positioning holes on the IGBT module are one-to-one corresponding.

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