Welding positioning jig for IGBT (Insulated Gate Bipolar Translator) module

Abstract

The utility model relates to the technical field of IGBT (Insulated Gate Bipolar Translator) module welding, and discloses an IGBT module welding positioning jig which comprises a bottom plate, four corners of the bottom end of the bottom plate are fixedly connected with stabilizing seats, the top of the bottom plate is provided with a positioning plate, the front and rear ends of the bottom plate and the positioning plate are provided with supporting assemblies, the inner wall of the positioning plate is provided with a plurality of limiting grooves, and the limiting grooves are fixedly connected with the stabilizing seats. Transfer frames are fixedly connected to the left side and the right side of the bottom end of the positioning plate, connecting plates are rotatably connected to the inner walls of the opposite ends of the transfer frames, square grooves are formed in the inner walls of the bottoms of the front end and the rear end of each connecting plate, and the connecting plates are connected with the bottom plate through limiting assemblies; sliding blocks are slidably connected to the inner walls of the front side and the rear side of the end, opposite to the positioning plate, of the bottom plate. According to the utility model, the supporting and limiting effects between the bottom plate and the positioning plate are improved, the installation of the jig by using screws or screws is reduced, and the influence of vibration in welding on the stability of the module is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT module welding, in particular to an IGBT module welding positioning fixture. Background Art

[0002] The IGBT module is a semiconductor power switching device that combines the high-speed switching capability of a field-effect transistor with the low on-state voltage drop characteristics of a bipolar transistor. Therefore, it is widely used in high-voltage, high-current applications. When assembling it, a welding jig is required to assist in positioning.

[0003] At present, some existing IGBT module welding jigs on the market require the use of multiple screws or bolts during assembly. The process of tightening the screws is cumbersome and inefficient. In addition, during the welding process, the jig will produce certain vibrations, which can easily cause the screws to loosen, affecting the stability of the jig when positioning the module, resulting in an increase in the defective rate of the product. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an IGBT module welding positioning fixture, which improves the support and limiting effect between the base plate and the positioning plate, reduces the use of screws or bolts to install the fixture, and reduces the impact of vibration during welding on the stability of the module.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A welding positioning fixture for an IGBT module comprises a base plate, wherein the four corners of the bottom end of the base plate are fixedly connected with stable seats, a positioning plate is installed on the top of the base plate, support components are installed on the front and rear ends of the base plate and the positioning plate, a plurality of limit grooves are provided on the inner wall of the positioning plate, an adapter frame is fixedly connected with the left and right sides of the bottom end of the positioning plate, a connecting plate is rotatably connected to the inner wall of the opposite end of the adapter frame, square grooves are provided on the inner walls of the bottoms of the front and rear ends of the connecting plate, the connecting plate and the base plate are connected by a limit component, and sliders are slidably connected to the inner walls of the front and rear sides of the end opposite to the base plate and the positioning plate.

[0007] Furthermore, the limit assembly includes a limit box fixedly connected to the left and right sides of the top of the bottom plate, the inner walls at the front and rear ends of the limit box are slidably connected with sliding bolts, the opposite ends of the sliding bolts on the front and rear sides are fixedly connected with a second spring, the inner walls at the front and rear sides of the opposite end of the limit box are slidably connected with baffles, the opposite ends of the baffles on the left and right sides are respectively fixedly connected to the outer walls of the sliding bolts, and the opposite ends of the baffles on the front and rear sides are fixedly connected with engaging blocks.

[0008] Furthermore, the support assembly includes a support frame clamped at both the front and rear ends of the bottom plate and the positioning plate, the support frame has clamping grooves on both the upper and lower sides of one opposite end, and the support frame has slots on both the upper and lower ends.

[0009] Furthermore, the opposite ends of the sliding blocks on the upper and lower sides are fixedly connected with plug plates, and the outer walls of the plug plates are slidably connected to the inner walls of the bottom plate and the positioning plate respectively.

[0010] Furthermore, the other ends of the sliding blocks are fixedly connected to first springs, and the other ends of the first springs are respectively fixedly connected to the inner walls of the bottom plate and the positioning plate.

[0011] Furthermore, the shape of the outer wall of the plug board matches the shape of the inner wall of the slot.

[0012] Furthermore, the distance between the upper and lower ends of the bottom plate and the positioning plate is the same as the distance between the upper and lower ends of the inner wall of the slot.

[0013] Furthermore, the shape of the outer wall of the engaging block matches the shape of the inner wall of the square groove.

[0014] The utility model has the following beneficial effects:

[0015] In the utility model, by pressing the sliding bolt into the limit box and squeezing the second spring, then placing the inner concave part at the bottom of the four-side connecting plates on the outside of the baffle plate, loosening the sliding bolt, and under the elastic force of the second spring, the sliding bolt drives the baffle plate to reset, so that the engaging block is inserted into the square groove, and the connecting plate is limited by the adapter frame, and then the upper plug-in plate is pressed into the positioning plate in turn, and the bottom slider thereof will squeeze the first spring, and then the upper and lower sides of the support frame are buckled in turn on the side of the plug-in plate corresponding to the positioning plate and the outer wall of the bottom plate, and under the elastic force of the first spring, the slider is driven to reset, and then the plug-in plate is inserted into the slot to limit the support frame, thereby improving the support and limiting effect between the bottom plate and the positioning plate, realizing the reduction of the use of screws or screws for the installation of the jig, and reducing the influence of vibration during welding on the stability of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front-end stereogram of an IGBT module welding positioning fixture proposed by the utility model;

[0017] Figure 2 This is a right end stereogram of an IGBT module welding positioning fixture proposed by the utility model;

[0018] Figure 3 This is a cross-sectional view of a positioning plate of an IGBT module welding positioning fixture proposed by the utility model;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a schematic diagram of the support frame structure of an IGBT module welding positioning fixture proposed by the utility model;

[0021] Figure 6 This is a cross-sectional view of a limit box of an IGBT module welding positioning fixture proposed by the utility model;

[0022] Figure 7 The utility model provides a schematic diagram of the structure of an adapter frame of an IGBT module welding positioning fixture.

[0023] Legend:

[0024] 1. Bottom plate; 2. Positioning plate; 3. Limiting groove; 4. Stable seat; 5. Support frame; 6. Connecting plate; 7. Adapter frame; 8. Limiting box; 9. Slider; 10. Insertion plate; 11. First spring; 12. Slot; 13. Socket; 14. Baffle; 15. Engagement block; 16. Sliding bolt; 17. Second spring; 18. Square groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-7 The utility model provides an embodiment: an IGBT module welding positioning fixture, including a base plate 1, four corners of the bottom end of the base plate 1 are fixedly connected with a stabilizing seat 4, a positioning plate 2 is installed on the top of the base plate 1, a plurality of limit grooves 3 are opened on the inner wall of the positioning plate 2, the left and right sides of the bottom end of the positioning plate 2 are fixedly connected with an adapter frame 7, the inner wall of the adapter frame 7 relative to one end is rotatably connected with a connecting plate 6, the inner wall of the bottom of the front and rear ends of the connecting plate 6 is opened with a square groove 18, and the inner walls of the front and rear sides of the base plate 1 and the positioning plate 2 are slidably connected with a slider 9.

[0027] Specifically, the limit box 8 is fixedly connected to the left and right sides of the top of the bottom plate 1, the inner walls of the front and rear ends of the limit box 8 are slidably connected with the sliding bolts 16, and the opposite ends of the front and rear sliding bolts 16 are fixedly connected with the second spring 17, and the inner walls of the front and rear sides of the opposite end of the limit box 8 are slidably connected with the baffle 14, and the opposite ends of the left and right baffles 14 on the same side are respectively fixedly connected to the outer wall of the sliding bolt 16, and the opposite ends of the front and rear baffles 14 on the same side are fixedly connected with the engaging blocks 15, and the four side connecting plates 6 are respectively rotated to make them change from the horizontal state to the horizontal state. The state is converted to a vertical state, and then the sliding bolts 16 are pressed into the limiting box 8 and the second springs 17 are squeezed, so that the baffles 14 are brought together in opposite directions. Then, the concave parts at the bottom of the four-side connecting plates 6 are placed on the outside of the baffles 14, and then the sliding bolts 16 are released. Under the elastic force of the second springs 17, the sliding bolts 16 drive the baffles 14 to reset, so that the engaging blocks 15 are inserted into the corresponding square grooves 18, and the adapter frame 7 is used to limit the connecting plates 6, thereby realizing the preliminary restriction of the positioning plate 2.

[0028] Specifically, the opposite ends of the upper and lower sliders 9 are fixedly connected with the plugging plates 10, and the outer walls of the plugging plates 10 are respectively slidably connected to the inner walls of the bottom plate 1 and the positioning plate 2, and the other ends of the sliders 9 are fixedly connected with the first springs 11, and the other ends of the first springs 11 are respectively fixedly connected to the inner walls of the bottom plate 1 and the positioning plate 2, and the shapes of the outer walls of the engaging blocks 15 are matched with the shapes of the inner walls of the square grooves 18, and the support frames 5 are clamped at the front and rear ends of the bottom plate 1 and the positioning plate 2, and the support frames 5 are provided with clamping grooves 12 on the upper and lower sides of the opposite end, and the support frames 5 are provided with slots 13 on the upper and lower ends, and the shapes of the outer walls of the plugging plates 10 are matched with the inner walls of the slots 13. The shapes match each other, and the distance between the upper and lower ends of the bottom plate 1 and the positioning plate 2 is the same as the distance between the upper and lower ends of the inner wall of the slot 12. The upper plug-in plate 10 is pressed into the positioning plate 2 one by one, and its bottom slider 9 will squeeze the first spring 11. Then, the support frame 5 is buckled on the side of the outer wall of the positioning plate 2 corresponding to the plug-in plate 10 in turn. Under the elastic force of the first spring 11, the slider 9 is driven to reset, and then the plug-in plate 10 is inserted into the slot 13 to limit the support frame 5. The bottom plug-in plate 10 of the bottom plate 1 is operated in the above manner, and the bottom of the support frame 5 is buckled on the outer wall of the bottom plate 1, thereby improving the support and limiting effect between the bottom plate 1 and the positioning plate 2.

[0029] Working principle: First, rotate the four side connecting plates 6 respectively to convert them from a horizontal state to a vertical state, then press the sliding bolts 16 into the limiting box 8 and squeeze the second spring 17, so that the baffles 14 are brought together in opposite directions, then place the concave parts at the bottom of the four side connecting plates 6 on the outside of the baffle 14, then release the sliding bolts 16, and under the elastic force of the second spring 17, the sliding bolts 16 drive the baffle 14 to reset, so that the engaging block 15 is inserted into the corresponding square groove 18, and cooperates with the adapter frame 7 to limit the connecting plate 6, so as to realize the preliminary restriction of the positioning plate 2, and then the upper plug The plates 10 are pressed into the positioning plates 2 one after another, and the slider 9 at the bottom thereof will squeeze the first spring 11, and then the support frame 5 will be buckled on the side of the outer wall of the positioning plate 2 corresponding to the plug-in plate 10 in turn. Under the elastic force of the first spring 11, the slider 9 is driven to reset, so that the plug-in plate 10 is inserted into the slot 13 to limit the support frame 5. The plug-in plate 10 at the bottom of the bottom plate 1 is operated in the above manner, and the bottom of the support frame 5 is buckled on the outer wall of the bottom plate 1 to improve the support and limiting effect between the bottom plate 1 and the positioning plate 2, and then the limiting groove 3 is used to limit the module, so that the module is not easily offset during the welding process.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An IGBT module welding positioning fixture, comprising a base plate (1), characterized in that: The bottom four corners of the base plate (1) are fixedly connected with a stabilizing seat (4), the top of the base plate (1) is installed with a positioning plate (2), the front and rear ends of the base plate (1) and the positioning plate (2) are installed with support components, the inner wall of the positioning plate (2) is provided with a plurality of limit grooves (3), the left and right sides of the bottom of the positioning plate (2) are fixedly connected with an adapter frame (7), the inner wall of the adapter frame (7) is rotatably connected with a connecting plate (6), the inner walls of the front and rear ends of the connecting plate (6) are provided with square grooves (18), the connecting plate (6) and the base plate (1) are connected by a limit component, and the inner walls of the front and rear sides of the base plate (1) and the positioning plate (2) are slidably connected with sliders (9).

2. The IGBT module welding positioning fixture according to claim 1, characterized in that: The limit assembly comprises a limit box (8) fixedly connected to both left and right sides of the top end of the bottom plate (1); the inner walls of both front and rear ends of the limit box (8) are slidably connected with sliding bolts (16); the opposite ends of the sliding bolts (16) on the same front and rear sides are fixedly connected with a second spring (17); the inner walls of both front and rear sides of the opposite end of the limit box (8) are slidably connected with baffles (14); the opposite ends of the baffles (14) on the same left and right sides are respectively fixedly connected to the outer walls of the sliding bolts (16); and the opposite ends of the baffles (14) on the same front and rear sides are fixedly connected with a fitting block (15).

3. The IGBT module welding positioning fixture according to claim 1, characterized in that: The support assembly comprises a support frame (5) which is clamped at both the front and rear ends of the bottom plate (1) and the positioning plate (2); a clamping groove (12) is provided at both the upper and lower sides of one opposite end of the support frame (5); and a slot (13) is provided at both the upper and lower ends of the support frame (5).

4. The IGBT module welding positioning fixture according to claim 1, characterized in that: The opposite ends of the sliding blocks (9) on the same upper and lower sides are fixedly connected with plug plates (10), and the outer walls of the plug plates (10) are slidably connected to the inner walls of the bottom plate (1) and the positioning plate (2).

5. The IGBT module welding positioning fixture according to claim 1, characterized in that: The other end of the sliding block (9) is fixedly connected to a first spring (11), and the other end of the first spring (11) is respectively fixedly connected to the inner wall of the bottom plate (1) and the positioning plate (2).

6. The IGBT module welding positioning fixture according to claim 4, characterized in that: The shape of the outer wall of the plug board (10) matches the shape of the inner wall of the slot (13).

7. The IGBT module welding positioning fixture according to claim 1, characterized in that: The distance between the upper and lower ends of the bottom plate (1) and the positioning plate (2) is the same as the distance between the upper and lower ends of the inner wall of the slot (12).

8. The IGBT module welding positioning fixture according to claim 2, characterized in that: The shape of the outer wall of the engaging block (15) matches the shape of the inner wall of the square groove (18).

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