CN217316634U

CN217316634U - Fixing jig

Info

Publication number: CN217316634U
Application number: CN202220229380.6U
Authority: CN
Inventors: 姚金才; 陈宇; 朱超群
Original assignee: Shenzhen Hester Technology Co ltd
Current assignee: Shenzhen Hester Technology Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-08-30
Anticipated expiration: 2032-01-27

Abstract

The utility model discloses a fixed tool, this fixed tool are used for the fixed of base plate and copper bar, and the base plate has the welding position, and the copper bar has the leg that corresponds with the welding position, fixed tool includes: a base having a mounting slot configured to mount a substrate; the pressing piece is detachably arranged on the base, a first pressing pin and a second pressing pin are convexly arranged on the pressing piece, the first pressing pin presses and fixes the substrate on the bottom of the mounting groove, and an accommodating space is formed between the pressing piece and the substrate; the second crimping leg extends into the accommodating space so as to fixedly crimp the welding leg of the copper bar to the welding position of the substrate. The utility model discloses technical scheme guarantees that the copper bar welding is at the assigned position of DBC board to guarantee the welding quality of copper bar welding on the DBC board.

Description

Fixing jig

Technical Field

The utility model relates to a tool technical field, in particular to fixed tool.

Background

In a conventional power module, a current provided by a power supply electrode is shunted to each chip through a wire of the DBC board so as to energize the chip.

In order to improve the current intensity of the current provided by the power supply electrode flowing to the chip, the related technology is changed, a copper bar is generally welded on the DBC plate and connected with the power supply electrode, so that the current is shunted to each chip by utilizing the copper bar, and the volume of the unit length of the copper bar is larger than that of a lead on the DBC plate, so that the current carrying capacity of the copper bar is higher than that of the lead, and the current intensity finally flowing to the chip is higher.

When welding the copper bar on the DBC board, generally need to weld the copper bar in the assigned position of DBC board to guarantee that the electric current that passes through from the copper bar can flow on the DBC board. Because there is not suitable fixed tool, be difficult to guarantee the assigned position of copper bar welding at the DBC board to be difficult to guarantee the welding quality of copper bar welding on the DBC board, influence the current intensity that the electric current flows to the DBC board through the copper easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fixed tool aims at guaranteeing the assigned position of copper bar welding at the DBC board to guarantee the welding quality of copper bar welding on the DBC board.

In order to achieve the above object, the utility model provides a fixed tool for the fixed of base plate and copper bar, the base plate has the welding position, and the copper bar has the leg that corresponds with the welding position, fixed tool includes:

a base having a mounting slot configured to mount a substrate;

the pressing piece is detachably arranged on the base, a first pressing pin and a second pressing pin are convexly arranged on the pressing piece, the first pressing pin presses and fixes the substrate on the bottom of the mounting groove, and an accommodating space is formed between the pressing piece and the substrate; the second crimping leg extends into the accommodating space so as to fixedly crimp the welding leg of the copper bar to the welding position of the substrate.

Optionally, the pressing and fixing part includes a first pressing solid body and a second pressing solid body which are separately arranged, the first pressing pin is arranged on the first pressing solid body, and the second pressing pin is arranged on the second pressing solid body.

Optionally, the first pressing body has a first plate surface and a second plate surface opposite to each other, the second plate surface is disposed toward the mounting groove, the first pressing body is provided with a positioning hole penetrating through the first plate surface and the second plate surface, the positioning hole is configured to expose a solder leg of the copper bar, and the second pressing body is disposed through the positioning hole.

Optionally, the top of the second press solid protrudes from the first board surface, a counterweight body is transversely and convexly arranged, and an orthographic projection of the counterweight body on the first board surface is located outside the pilot hole.

Optionally, the first press solid is in a plate shape opposite to the substrate, the number of the first press pins is multiple, and the first press pins are convexly arranged at each corner of the first press solid.

Optionally, a limiting column is disposed at a bottom of the mounting groove, and the limiting column is configured to be sleeved with a limiting hole of the substrate.

Optionally, the first compression joint foot is provided with a sleeve hole corresponding to the limiting column, and the sleeve hole is detachably sleeved on the limiting column.

Optionally, a supporting column is further arranged on the base, the supporting column is arranged to avoid the installation groove, and the supporting column is configured to support a lug protruding from the side edge of the copper bar.

Optionally, the base is provided with a limiting groove, the supporting column is arranged in the limiting groove, and the groove wall of the limiting groove is configured to be in limiting abutment with two opposite side edges of the lug on the side of the copper bar.

Optionally, still be equipped with the constant head tank on the base, the constant head tank is close to the mounting groove sets up, fixed tool still includes the locating part, the locating part is including continuous installation department and spacing portion, installation department demountable installation in the constant head tank, spacing portion extends to accommodation space, the accommodation hole has been seted up to spacing portion, the accommodation hole is configured to hold the copper billet to with the copper billet spacing in the predetermined region of DBC board.

The technical scheme of the utility model, through setting up the mounting groove that is used for mounting substrate on the base, make the base plate obtain the spacing of base, then through setting up the pressure firmware again, it presses the pin to be equipped with first pressure pin and second pressure pin at the pressure firmware epirelief, so that the pressure firmware relies on gravity to press the base plate to consolidate in the mounting groove tank bottom through first pressure pin in, the pressure firmware still relies on gravity to press the pin of copper bar to consolidate in the welding position of base plate through second pressure pin, make and can not take place relative displacement between the welding position of the pin of copper bar and base plate, thereby make the copper bar when the welding, what the pin can stabilize welds in the welding position on the DBC board of base plate, thereby guarantee the welding quality of copper bar welding on the DBC board, with the intensity of current on guaranteeing the electric current through copper drainage to the DBC board.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a view angle of the fixing jig of the present invention;

fig. 2 is a schematic structural view of the fixing jig of the present invention at another viewing angle;

fig. 3 is a schematic structural view of the base plate and the copper bar of the present invention mounted on the base;

fig. 4 is a schematic structural view of the base and the limiting member of the fixing jig of the present invention;

fig. 5 is a schematic structural view of the first pressing body of the fixing jig of the present invention;

fig. 6 is a schematic structural view of a second press solid body of the fixing jig of the present invention;

fig. 7 is a schematic structural view of the base plate of the present invention;

fig. 8 is a schematic structural view of the copper bar of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The specific structure of the fixing jig will be mainly described below.

Referring to fig. 1 to 8, in the embodiment of the present invention, the fixing jig is used for fixing the substrate 400 and the copper bar 500, the substrate 400 has a welding position 410, the copper bar 500 has a fillet 510 corresponding to the welding position 410, the fixing jig includes:

a base 100, the base 100 having a mounting groove 110, the mounting groove 110 configured to mount a substrate 400;

the pressing piece is detachably arranged on the base 100, the pressing piece is convexly provided with a first pressing pin 211 and a second pressing pin 221, the first pressing pin 211 presses and fixes the substrate 400 on the bottom of the mounting groove 110, and an accommodating space 230 is formed between the pressing piece and the substrate 400; the second pressing pin 221 extends into the accommodating space 230 to press and fix the solder leg 510 of the copper bar 500 to the soldering position 410 of the substrate 400.

Specifically, in the present embodiment, the shape of the cross section of the base 100 can be selected from various shapes, such as a circle, an ellipse, a square, a rectangle, etc., and in the present embodiment, the cross section is a rectangle. The shape and size of the mounting groove 110 can be determined according to the shape and size of the substrate 400 to be matched with the substrate 400, so that after the substrate 400 is mounted in the mounting groove 110, the peripheral wall of the substrate 400 is limited by the wall of the mounting groove 110, and the substrate 400 is not easy to move left and right on the mounting groove 110, so that the limit of the mounting groove 110 is obtained. It should be noted that the substrate 400 includes a DBC board 402 and a supporting board 401 for supporting the DBC board 402, the supporting board 401 can also dissipate heat while supporting the DBC board 402, and the soldering site 410 is located on the DBC board 402.

The fastening member can be detachably mounted on the base 100 in many ways, such as clamping, plugging, sleeving, etc., and is not limited in this respect. The pressing member may be located above the mounting groove 110, and the first pressing pin 211 and the second pressing pin 221 may be located on a surface of the pressing member facing the mounting groove 110, so that the first pressing pin 211 may press the substrate 400 onto the bottom of the mounting groove 110 by gravity, and at the same time, the accommodating space 230 may be separated between the pressing member and the substrate 400, so as to accommodate the second pressing pin 221 and the solder pin 510 of the copper bar 500. Thus, in operation, the substrate 400 can be installed at the bottom of the installation groove 110, then the copper bar 500 is arranged on the substrate 400 according to the direction and position of the solder leg 510 aligned with the solder position 410 of the substrate 400, and then the pressing member is installed, so that when the first press leg 211 presses the substrate 400, the second press leg 221 extends into the accommodating space 230 to press and fix the solder leg 510 of the copper bar 500 on the solder position 410 of the substrate 400 by gravity, so that no relative displacement occurs between the solder leg 510 of the copper bar 500 and the solder position 410 of the substrate 400, and finally the copper bar 500 and the substrate 400 are moved together with the fixing jig into the reflow oven, so that the solder leg 510 of the copper bar 500 is welded on the solder position 410 of the substrate 400, and after the soldering is completed, the pressing member is removed to take out the soldered copper bar 500 and the substrate 400. It should be noted that, in practical applications, the positions of the first pressure pin 211 and the second pressure pin 221 may be reasonably arranged according to the position of the soldering position 410 of the substrate 400, so as to ensure that the second pressure pin 221 can press and fix the solder leg 510 of the copper bar 500 to the soldering position 410 of the substrate 400 while the first pressure pin 211 presses and fixes the substrate 400.

The technical proposal of the utility model is that the base plate 400 is limited by the base 100 by arranging the mounting groove 110 for mounting the base plate 400 on the base 100, and then the pressing piece is arranged, the first pressing pin 211 and the second pressing pin 221 are protruded on the pressing member, so that the pressing member presses and fixes the substrate 400 to the bottom of the mounting groove 110 through the first pressing pin 211 by gravity, the pressing member also presses and fixes the solder leg 510 of the copper bar 500 to the soldering position 410 of the substrate 400 through the second pressing leg 221 by gravity, so that the solder tails 510 of the copper bars 500 and the soldering sites 410 of the substrate 400 will not be displaced relatively, therefore, when the copper bar 500 is soldered, the solder leg 510 can be firmly soldered to the soldering position 410 on the DBC board 402 of the substrate 400, thereby guarantee the welding quality of copper bar 500 welding on the DBC board 402 to guarantee that the electric current flows the current intensity on the DBC board 402 through copper bar 500.

In some embodiments, the pressing member includes a first pressing member 210 and a second pressing member 220, which are separately disposed, the first pressing pin 211 is disposed on the first pressing member 210, and the second pressing pin 221 is disposed on the second pressing member 220. It can be understood that, the first pressure pin 211 and the second pressure pin 221 respectively abut against the substrate 400 and the copper bar 500 during operation, which is prone to wear during long-term operation, and thus, with such an arrangement in this embodiment, the first pressure solid 210 or the second pressure solid 220 can be replaced independently, so that the first pressure pin 211 or the second pressure pin 221 can be replaced independently when one of the first pressure pin 211 or the second pressure pin 221 has a poor use effect or is damaged, and the whole pressure pin does not need to be discarded, which is beneficial to saving cost; in addition, the second pressing bodies 220 can be replaced independently to replace different second pressing pins 221, so that the copper bar pressing fixture is suitable for different copper bars 500, and the applicability of the fixing fixture is improved.

Regarding the installation manner of the first pressing solid 210 and the second pressing solid 220, in some embodiments, the first pressing solid 210 has a first plate surface 212 and a second plate surface 213 opposite to each other, the second plate surface 213 is disposed toward the installation groove 110, the first pressing solid 210 is formed with a positioning hole 214 penetrating through the first plate surface 212 and the second plate surface 213, the positioning hole 214 is configured to expose the solder leg 510 of the copper bar 500, and the second pressing solid 220 is disposed through the positioning hole 214. During operation, the first press solid 210 may be pressed and fixed on the substrate 400, and then the second press solid 220 is inserted into the positioning hole 214 of the first press solid 210, during actual design, the opening position of the positioning hole 214 corresponds to the solder leg 510 of the copper bar 500 to expose the solder leg 510 of the copper bar 500, so that after the second press solid 220 is inserted into the positioning hole 214 from the first plate surface 212, the second press leg 221 may be pressed against the solder leg 510 of the copper bar 500 to press and fix the solder leg 510 of the copper bar 500 on the welding position 410 of the substrate 400.

Further, the top of the second press solid 220 protrudes from the first board surface 212, and a weight body 222 is protruded along the transverse direction, and the orthographic projection of the weight body 222 on the first board surface 212 is located outside the positioning hole 214. Thus, when the first pressing solid body 210 is pulled to detach the first pressing solid body 210 from the base 100, the weight body 222 is overlapped on the first plate surface 212 of the first pressing solid body 210, so that the second pressing solid body 220 is not dropped from the positioning hole 214, but is detached from the base 100 along with the first pressing solid body 210, which is beneficial to improving the rapidness of detaching the pressing solid body; in addition, the arrangement of the counterweight 222 can also increase the pressing force of the second pressing pin 221 against the solder leg 510 of the copper bar 500, so as to further ensure that no relative displacement occurs between the solder leg 510 of the copper bar 500 and the soldering position 410 of the substrate 400, thereby ensuring that the solder leg 510 can be stably soldered to the soldering position 410 on the DBC board 402 of the substrate 400.

In order to improve the pressing effect of the first pressing member 210 on the substrate 400, in some embodiments, the first pressing member 210 is shaped like a plate opposite to the substrate 400, the number of the first pressing pins 211 is multiple, and the multiple first pressing pins 211 are convexly disposed at each corner of the first pressing member 210. Therefore, each corner of the substrate 400 can be pressed by the second pressing body 220, so that the substrate 400 is not easy to tilt and is uniformly stressed, and the effect of pressing the substrate 400 at the bottom of the mounting groove 110 by the first pressing body 210 is improved.

In some embodiments, the bottom of the mounting groove 110 is provided with a limiting column 111, and the limiting column 111 is configured to be sleeved with the limiting hole 420 of the substrate 400. Therefore, the limiting columns 111 can limit the displacement of the substrate 400, and the fixing effect of the fixing jig on the substrate 400 is further improved. Further, the first pressure pin 211 is provided with a sleeve hole 215 corresponding to the limiting column 111, and the sleeve hole 215 is detachably sleeved on the limiting column 111. Therefore, on one hand, the limiting column 111 can limit the displacement of the first pressure pin 211 and even the pressure-fixing piece, so that the first pressure pin 211 and even the pressure-fixing piece can stably and reliably press and fix the substrate 400 and the copper bar 500, the fixing effect of the fixing jig on the substrate 400 and the copper bar 500 is further improved, and the welding quality of the copper bar 500 welded on the substrate 400 is improved; on the other hand, can also play the positioning action to first pressure pin 211 to the quick accurate preset position of installing in base 100 of pressing the firmware improves fixed tool's work efficiency.

In some embodiments, a supporting column 121 is further disposed on the base 100, the supporting column 121 is disposed to be away from the mounting groove 110, and the supporting column 121 is configured to support a lug 520 protruding from a side of the copper bar 500. The setting of support column 121 is favorable to improving the equilibrium and the steadiness of copper bar 500 for copper bar 500 can weld on base plate 400 according to predetermined angle, improves the welding quality that copper bar 500 welded in base plate 400. During actual design, the top surface of the supporting column 121 may be provided with a limiting protrusion 122, and the mounting hole 521 of the lug 520 on the side of the copper bar 500 is sleeved on the limiting protrusion 122, so that the supporting column 121 supports the lug 520, and the limiting protrusion 122 can also limit the swing of the lug 520, thereby further improving the balance of the copper bar 500.

Further, the base 100 is provided with a limiting groove 120, the supporting column 121 is disposed in the limiting groove 120, and a groove wall of the limiting groove 120 is configured to be in limiting abutment with two opposite side edges of the lug 520 at the side of the copper bar 500. Therefore, the shaking of the lug 520 is further limited, the balance and the stability of the copper bar 500 are improved, the copper bar 500 can be welded on the substrate 400 according to a preset angle, and the welding quality of the copper bar 500 welded on the substrate 400 is improved.

In some embodiments, the base 100 further includes a positioning groove disposed near the mounting groove 110, the fixing fixture further includes a limiting member 300, the limiting member 300 includes a mounting portion 310 and a limiting portion 320 connected to each other, the mounting portion 310 is detachably mounted on the positioning groove, the limiting portion 320 extends to the accommodating space 230, the limiting portion 320 is provided with an accommodating hole 321, and the accommodating hole 321 is configured to accommodate the copper block 600, so as to limit the copper block 600 to the preset region 430 of the DBC board 402. It can be understood that, the substrate 400 generally includes more than two DBC boards 402, and the copper block 600 may be used to connect two adjacent DBC boards 402, so it is necessary to weld the copper block 600 to the predetermined area 430 of the DBC board 402, in this embodiment, the shape and size of the receiving hole 321 may be adapted to the shape and size of the copper block 600, so that when the copper block 600 is placed in the receiving hole 321, the peripheral wall of the copper block 600 is limited by the hole wall of the receiving hole 321, so that the copper block 600 is not easily moved left and right in the receiving hole 321, so as to obtain the fixation of the receiving hole 321, so that the copper block 600 can be welded to the predetermined position of the DBC board 402, improve the welding quality of the copper block 600 to the DBC boards 402, and ensure that the copper block 600 can electrically connect the two adjacent DBC boards 402.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides a fixed tool, its characterized in that, this fixed tool is used for the fixed of base plate and copper bar, and the base plate has the welding position, and the copper bar has the leg that corresponds with the welding position, fixed tool includes:

a base having a mounting slot configured to mount a substrate;

2. The fixture according to claim 1, wherein the pressing member includes a first pressing member and a second pressing member that are separately disposed, the first pressing member is disposed on the first pressing member, and the second pressing member is disposed on the second pressing member.

3. The fixing fixture according to claim 2, wherein the first pressing body has a first plate surface and a second plate surface opposite to each other, the second plate surface is disposed toward the mounting groove, the first pressing body defines a positioning hole penetrating through the first plate surface and the second plate surface, the positioning hole is configured to expose a solder leg of the copper bar, and the second pressing body is disposed through the positioning hole.

4. The fixture according to claim 3, wherein the top of the second press-solid protrudes from the first board surface, and a weight body protrudes along the transverse direction, and an orthographic projection of the weight body on the first board surface is located outside the positioning hole.

5. The fixture according to claim 2, wherein the first press-fixing member is formed in a plate shape facing the substrate, the number of the first press-connecting legs is plural, and the plural first press-connecting legs are protruded at each corner of the first press-fixing member.

6. The fixture according to claim 1, wherein a limiting post is disposed at a bottom of the mounting groove, and the limiting post is configured to be disposed in a limiting hole of the substrate.

7. The fixing jig according to claim 6, wherein the first press-connecting leg is provided with a sleeve hole corresponding to the position-limiting post, and the sleeve hole is detachably sleeved on the position-limiting post.

8. The fixing jig according to claim 1, wherein a support pillar is further provided on the base, the support pillar is disposed to be away from the mounting groove, and the support pillar is configured to support a lug protruding from a side of the copper bar.

9. The fixing jig according to claim 8, wherein the base is provided with a limiting groove, the supporting column is provided with the limiting groove, and the groove wall of the limiting groove is configured to limit and abut against two opposite side edges of the lug on the side of the copper bar.

10. The fixing jig according to claim 1, wherein the base further includes a positioning groove, the positioning groove is disposed near the mounting groove, the fixing jig further includes a limiting member, the limiting member includes a mounting portion and a limiting portion, the mounting portion is detachably mounted on the positioning groove, the limiting portion extends to the accommodating space, the limiting portion is provided with an accommodating hole, and the accommodating hole is configured to accommodate a copper block so as to limit the copper block to a preset region of the DBC board.