A single tube IGBT packaging welding plate

Abstract

The utility model relates to a single-tube IGBT packaging welding plate, comprising a bottom plate, an IGBT single tube and a PCB board, the IGBT single tube is provided with a pre-installed hole, a positioning ring is fixedly provided at one corner of the upper end of the bottom plate, baffles are fixedly provided at two corners of the upper end of the bottom plate, the two baffles are adjacent to the positioning ring, the PCB board is assembled on the upper end of the bottom plate, a positioning hole that is slidably matched with the positioning ring is provided at one corner of the PCB board, the two baffles are respectively abutted and matched with two adjacent edges of the PCB board, a plurality of reserved grooves are provided on the PCB board, a plurality of limiting rods with a radius smaller than the reserved groove are fixedly provided at the upper end of the bottom plate, the limiting rods are slidably matched with the pre-installed holes, a plurality of IGBT single tubes are assembled on the upper end of the PCB board, a pad is provided at the upper end of the plurality of IGBT single tubes, the pad is provided with a guide groove and a connecting groove, a top plate is provided at the upper end of the pad, the top plate is detachably fixedly assembled on the bottom plate, the top plate is slidably matched with the bottom plate, and a welding groove corresponding to the connecting groove is provided at the upper end of the top plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of single-tube IGBT welding, and in particular relates to a single-tube IGBT packaging welding disc. Background Art

[0002] An IGBT single tube is a monolithic IGBT, which has only one IGBT transistor, a reverse recovery diode and an optional temperature sensor. It can be used for high-voltage, high-frequency, high-power power control applications, such as motor control, frequency converter, UPS, inverter, power supply, etc. The pins of the IGBT single tube are connected to the external circuit to achieve current control and voltage resistance functions. In the prior art, the IGBT single tube is fixed on the PCB by extrusion by two welding plates, and then welded by a welding device. At present, the positioning of the PCB board is usually the cooperation of multiple positioning pins and positioning holes. The positioning speed is slow, and the operation is prone to hard pulling of the PCB board, which is easy to cause deformation or damage to the PCB board. At present, the positioning in the assembly process of the IGBT single tube basically relies on the L-shaped card block to limit the corners of the IGBT single tube, which is relatively cumbersome during assembly, and it is not possible to quickly regularize a number of IGBT single tubes at one time, which reduces the efficiency of the IGBT single tube welding process. Utility Model Content

[0003] The purpose of the utility model is to provide a single-tube IGBT packaging welding plate to solve the problems existing in the background technology.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] A single-tube IGBT package welding plate, comprising a base plate, an IGBT single tube and a PCB board, wherein the IGBT single tube is provided with a pre-installed hole, a positioning ring is fixedly provided at one corner of the upper end of the base plate, and baffles are fixedly provided at two corners of the upper end of the base plate, the two baffles are adjacent to the positioning ring, and the extension direction of the two baffles is directed to one side of the positioning ring;

[0006] The PCB board is assembled on the upper end of the bottom plate, a positioning hole slidably matched with the positioning ring is opened at a corner of the PCB board, the two blocking bars are respectively abutted and matched with two adjacent edges of the PCB board, a plurality of reserved grooves are opened on the PCB board, a plurality of limiting rods with a radius smaller than the reserved grooves are fixedly arranged on the upper end of the bottom plate, the limiting rods are slidably matched with the pre-installed holes, and a plurality of IGBT single tubes are assembled on the upper end of the PCB board;

[0007] A gasket is installed on the upper end of several of the IGBT single tubes, and the gasket is provided with a guide groove and a connecting groove. A top plate is installed on the upper end of the gasket, and the top plate can be detachably fixedly installed on the bottom plate. The top plate and the bottom plate are slidably matched up and down, and a welding groove corresponding to the connecting groove is opened on the upper end of the top plate.

[0008] Preferably, threaded holes are provided at the four corners of the upper end of the bottom plate, the center of the positioning ring corresponds to the center of one of the threaded holes, the other three corners of the PCB board are provided with through holes corresponding one-to-one to the threaded holes on the lower side, and the upper end of the top plate is provided with sliding grooves corresponding one-to-one to the positions of several threaded holes, the sliding grooves and the through holes are slidably equipped with lengthened bolts, and the lengthened bolts are threadedly rotatably connected to the threaded holes.

[0009] Preferably, a knob is fixedly provided on the upper end of the lengthened bolt, and a protection component is provided between the knob and the lengthened bolt. The protection component includes a slip ring and a spring. The slip ring is slidably assembled on the upper side of the lengthened bolt, and the spring is sleeved on the outside of the lengthened bolt. The spring is fixed between the knob and the slip ring.

[0010] Preferably, a limiting groove is provided on the upper side of the lengthened bolt, and a limiting block matching the limiting groove is fixedly provided on the inner side of the slip ring.

[0011] Preferably, a pull strip is fixedly provided on the front side of the dolly.

[0012] Preferably, four sides of the bottom plate are provided with portable slots, and portable sheets are fixedly provided on the upper sides of the four portable slots.

[0013] The beneficial effects of the utility model are as follows: when installing the PCB board, the positioning hole of the PCB board is aligned with the positioning ring, and then the position of the PCB board is fine-tuned by rotating along the center of the positioning ring so that the two adjacent edges of the PCB board are aligned with the two baffles. At this time, the PCB board can be completely placed downward, so that the PCB board and the base plate can be quickly positioned and installed, and there is no need to connect multiple positioning pins with positioning holes, which can greatly improve the installation efficiency of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings.

[0015] Figure 1 This is a structural schematic diagram of a single-tube IGBT packaging welding pad of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure explosion of a single-tube IGBT packaging welding pad of the utility model;

[0017] Figure 3 for Figure 2The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0019] Figure 5 This is a partial structural schematic diagram of a single-tube IGBT packaging welding pad of the utility model;

[0020] Figure 6 for Figure 5 The enlarged schematic diagram of the center C;

[0021] Figure 7 This is a structural schematic diagram of a bottom plate in a single-tube IGBT packaging welding disk of the utility model;

[0022] The main component symbols are described as follows:

[0023] Base plate 1, threaded hole 11, positioning ring 12, baffle 121, positioning hole 122, through hole 123, reserved groove 13, limiting rod 14, pad 15, guide groove 151, connecting groove 152, pull bar 153, top plate 16, welding groove 161, slide groove 162, extension bolt 17, knob 171, slip ring 172, spring 173, limiting groove 174, limiting block 175, portable groove 18, portable sheet 181, IGBT single tube 2, pre-installed hole 21, PCB board 3. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1 to 2 As shown in Figures 6 and 7, a single-tube IGBT package welding plate of the utility model comprises a base plate 1, an IGBT single tube 2 and a PCB board 3, the IGBT single tube 2 is provided with a pre-installed hole 21, a positioning ring 12 is fixedly provided at one corner of the upper end of the base plate 1, and baffles 121 are fixedly provided at two corners of the upper end of the base plate 1, the two baffles 121 are adjacent to the positioning ring 12, and the extension direction of the two baffles 121 points to one side of the positioning ring 12, and the four sides of the base plate 1 are provided with portable slots 18, which can facilitate the staff to place and take out the PCB board 3, and the upper sides of the four portable slots 18 are fixed with portable sheets 181, which are conducive to the staff to lift the base plate 1 placed on the horizontal plane;

[0026] The PCB board 3 is assembled on the upper end of the bottom plate 1. A positioning hole 122 that is slidably matched with the positioning ring 12 is opened at one corner of the PCB board 3. Two blocking bars 121 are respectively abutted and matched with two adjacent edges of the PCB board 3. A plurality of reserved grooves 13 are opened on the PCB board 3. A plurality of limiting rods 14 with a radius smaller than the reserved grooves 13 are fixedly arranged on the upper end of the bottom plate 1. The limiting rods 14 are slidably matched with the pre-installed holes 21. A plurality of IGBT single tubes 2 are assembled on the upper end of the PCB board 3.

[0027] like Figure 4-5 As shown, a plurality of IGBT single tubes 2 are equipped with a pad 15 at the upper end, the pad 15 is provided with a guide groove 151 and a connecting groove 152, a pull bar 153 is fixedly provided at the front side of the pad 15, the pad 15 can regularize a plurality of flush IGBT single tubes 2 through the guide groove 151, so that the position of the IGBT single tube 2 is neat, and the pad 15 can also prevent the top plate 16 from directly contacting the IGBT single tube 2, the top end of the pad 15 is equipped with a top plate 16, the top plate 16 can be detachably fixedly assembled on the bottom plate 1, the top plate 16 and the bottom plate 1 are slidably matched up and down, and a welding groove 161 corresponding to the connecting groove 152 is provided at the upper end of the top plate 16;

[0028] like Figure 2-3 As shown, threaded holes 11 are provided at the four corners of the upper end of the bottom plate 1, and the center of the positioning ring 12 corresponds to the center of one of the threaded holes 11. Through holes 123 corresponding to the lower threaded holes 11 are provided at the other three corners of the PCB board 3. A slide groove 162 corresponding to the positions of the threaded holes 11 is provided at the upper end of the top plate 16. The slide groove 162 and the through hole 123 are slidably assembled with an extension bolt 17. The extension bolt 17 is threadedly rotatably connected to the threaded hole 11. A knob 171 is fixedly provided at the upper end of the extension bolt 17. The top plate 16 and the bottom plate 1 can be fixed by the extension bolt 17. A protection component is provided between the knob 171 and the extension bolt 17 to protect The assembly includes a slip ring 172 and a spring 173. The slip ring 172 is slidably assembled on the upper side of the lengthened bolt 17. The spring 173 is sleeved on the outer side of the lengthened bolt 17. The spring 173 is fixedly arranged between the knob 171 and the slip ring 172. A limiting groove 174 is provided on the upper side of the lengthened bolt 17. A limiting block 175 matching the limiting groove 174 is fixedly arranged on the inner side of the slip ring 172. The buffering of the spring 173 can reduce the damage caused by hard extrusion, making it convenient for the staff to control the force of extrusion and fixation to avoid damage to the IGBT single tube 2. Moreover, the cooperation between the limiting groove 174 and the limiting block 175 can prevent the spring 173 from being deformed when the lengthened bolt 17 is rotated.

[0029] When using the welding plate to weld and install the IGBT single tube 2 and the PCB board 3, first place the bottom plate 1 on the work platform, then align the positioning hole 122 of the PCB board 3 with the positioning ring 12, and then rotate along the center of the circle of the positioning ring 12 to fine-tune the position of the PCB board 3 so that the two adjacent sides of the PCB board 3 are aligned with the two blocking bars 121. At this time, the PCB board 3 can be completely placed downward, so that the PCB board 3 and the bottom plate 1 can be quickly positioned and installed, and there is no need to dock multiple positioning pins with positioning holes, which can greatly improve the installation efficiency of the PCB board 3. Since the radius of the limit rod 14 is smaller than the reserved groove 13, when installing the PCB board 3 At the same time, several limit rods 14 can easily and quickly pass through the reserved grooves 13, and then the IGBT single tube 2 can be installed in turn through the cooperation of the pre-installed holes 21 and the limit rods 14. After the IGBT single tube 2 is installed, the pins of the IGBT single tube 2 are placed toward the front. At this time, a pad 15 is assembled on the several IGBT single tubes 2. The inner wall of the guide groove 151 of the pad 15 can be aligned with the rear side walls of several horizontally distributed IGBT single tubes 2. Then, the pad 15 can be pulled forward or pushed forward to quickly align the several IGBT single tubes 2, and then the top plate 16 can be slid downward to assemble, and finally the IGBT single tube 2 and the PCB board 3 can be fixed by lengthening the bolts 17.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A single-tube IGBT package welding plate, comprising a base plate, an IGBT single tube and a PCB board, wherein the IGBT single tube is provided with a pre-installed hole, characterized in that: A positioning ring is fixedly provided at one corner of the upper end of the bottom plate, and baffles are fixedly provided at two corners of the upper end of the bottom plate, the two baffles are adjacent to the positioning ring, and the extension directions of the two baffles are both directed to one side of the positioning ring; The PCB board is assembled on the upper end of the bottom plate, a positioning hole slidably matched with the positioning ring is opened at a corner of the PCB board, the two blocking bars are respectively abutted and matched with two adjacent edges of the PCB board, a plurality of reserved grooves are opened on the PCB board, a plurality of limiting rods with a radius smaller than the reserved grooves are fixedly arranged on the upper end of the bottom plate, the limiting rods are slidably matched with the pre-installed holes, and a plurality of IGBT single tubes are assembled on the upper end of the PCB board; A gasket is installed on the upper end of several of the IGBT single tubes, and the gasket is provided with a guide groove and a connecting groove. A top plate is installed on the upper end of the gasket, and the top plate can be detachably fixedly installed on the bottom plate. The top plate and the bottom plate are slidably matched up and down, and a welding groove corresponding to the connecting groove is opened on the upper end of the top plate.

2. A single-tube IGBT package welding pad according to claim 1, characterized in that: Threaded holes are provided at the four corners at the upper end of the bottom plate, the center of the positioning ring corresponds to the center of one of the threaded holes, the other three corners of the PCB board are provided with through holes corresponding one-to-one to the threaded holes on the lower side, and the upper end of the top plate is provided with sliding grooves corresponding one-to-one to the positions of several threaded holes, the sliding grooves and the through holes are slidably equipped with lengthened bolts, and the lengthened bolts are threadedly rotatably connected to the threaded holes.

3. A single-tube IGBT package welding pad according to claim 2, characterized in that: A knob is fixedly provided on the upper end of the lengthened bolt, and a protection component is provided between the knob and the lengthened bolt. The protection component includes a slip ring and a spring. The slip ring is slidably assembled on the upper side of the lengthened bolt, and the spring is sleeved on the outside of the lengthened bolt and fixedly provided between the knob and the slip ring.

4. The single-tube IGBT package welding pad according to claim 3, characterized in that: A limiting groove is provided on the upper side of the lengthened bolt, and a limiting block matching the limiting groove is fixedly provided on the inner side of the slip ring.

5. The single-tube IGBT package welding pad according to claim 1, characterized in that: A pull bar is fixedly provided on the front side of the pad.

6. The single-tube IGBT package welding pad according to claim 1, characterized in that: The four sides of the bottom plate are all provided with portable slots, and the upper sides of the four portable slots are all fixed with portable sheets.

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