Power module pin jig
By designing a pin-insertion fixture that includes a placement plate, a cover plate, and a pin plate, the problems of cumbersome assembly and difficult angle control in the prior art are solved, and efficient and precise pin welding of multiple power modules is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-31
AI Technical Summary
Existing power module pin fixtures are cumbersome to assemble, make it difficult to solder multiple products simultaneously, and cannot precisely control the angle of the pins.
A pin insertion fixture comprising a placement plate, a cover plate, and a pin insertion plate was designed. Through the cooperation of magnetic holes, pin holes, and pins, it enables simultaneous pin insertion and soldering of multiple power modules, and precisely controls the pin angle through positioning holes.
It improves pin insertion efficiency, ensures pin angle accuracy, and makes assembly and disassembly processes more stable and convenient.
Smart Images
Figure CN224069095U_ABST
Abstract
Description
Technical Field
[0001] This application relates to power module packaging technology, specifically to a power module pin fixture. Background Technology
[0002] After the power module is wire bonded, the pins need to be soldered. The common soldering process involves applying solder to fixed positions on the surface of the power module, then attaching the pins one by one to the soldered positions, and finally placing it in a hot air reflow oven for curing.
[0003] During the welding process, pin insertion fixtures are generally used to assist in welding. However, the existing fixtures are cumbersome to assemble and can only produce single products. At the same time, the PIN pins need to have uniform flatness after curing, and their angles need to be controlled within a certain range. However, the front end of the PIN pin is square, which is difficult to operate using the existing manual insertion fixtures. Utility Model Content
[0004] To address the aforementioned deficiencies in the prior art, this application provides a power module pin fixture that is easy to assemble and can perform pin soldering on multiple power modules in a single assembly. It also allows for precise control of the pin angle and has strong practicality.
[0005] To achieve the above objectives, the present invention employs the following technology:
[0006] A power module pin fixture, comprising:
[0007] A placement plate with multiple placement cavities running through it is arranged in an array along the length of the placement plate, and each placement cavity has a placement edge extending inward from the lower end of its inner wall.
[0008] The cover plate, when in use, is placed above the placement plate to mate with the upper surface of the placement plate;
[0009] The pin plate, in application, is located below the placement plate and is used to mate with the lower surface of the placement plate. The pin plate includes a number of pin areas matching the number of placement cavities. Each pin area has a number of pin holes in the same position. A positioning plate is installed on the lower surface of each pin area on the pin plate. Each positioning plate has a number of positioning holes matching the number of pin holes in one of the pin areas. The positioning holes are coaxial with the pin holes one by one.
[0010] Furthermore, the upper surface of the placement plate is provided with multiple first magnetic holes, and the lower surface of the cover plate is provided with magnetic blocks whose number and position match the first magnetic holes. The magnetic blocks are used to cooperate with the first magnetic holes. Both ends of the upper surface of the placement plate are provided with slots, and the two sides of the slots respectively extend to the inner wall of the placement cavity located at the end of the array and the end face of the placement plate.
[0011] Furthermore, the placement plate has multiple pin holes, and the upper surface of the pin plate is provided with pins in a number and position that match the pin holes. The pins are used to engage with the pin holes.
[0012] Furthermore, multiple first fixing blocks extend outward from both ends of the placement plate, and a number of second fixing blocks, matching the number of the first fixing blocks, extend outward from both ends of the pin plate. Each first fixing block has a second magnetic hole on its lower surface, and each second fixing block has a through-hole. The through-holes are coaxial with the second magnetic holes, and a magnetic rod slides through each through-hole. The upper end of the magnetic rod is used to engage with the second magnetic hole, and the lower end of the magnetic rod is coaxially connected to an end post. A spring is connected between the end post and the corresponding second fixing block. The springs are coaxially sleeved around the magnetic rod. When the spring is in its original state, the length of the upper end of the magnetic rod extending out of the through-hole matches the depth of the second magnetic hole.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. It can assist in the soldering of pins for multiple power modules simultaneously, improving pin insertion efficiency.
[0015] 2. The position of the PIN pin is limited by the positioning hole, which improves the accuracy of the pin insertion angle without affecting the difficulty of pin insertion.
[0016] 3. By cooperating with the first magnetic hole and the magnetic block, and with the pin hole and the pin, the placement plate, the cover plate and the pin plate are tightly connected, which improves the stability, ease of assembly and ease of disassembly of the pin fixture. Attached Figure Description
[0017] Figure 1 This is a three-dimensional schematic diagram of the power module pin fixture according to an embodiment of this application.
[0018] Figure 2 This is an exploded perspective view of the first fixing block, the second fixing block, the magnetic rod, and the spring according to an embodiment of this application.
[0019] The markings in the diagram are: 1-Placement plate, 11-Placement cavity, 12-Placement edge, 13-First magnetic hole, 14-Magnetic block, 15-Slot, 16-Pin hole, 17-First fixing block, 18-Second magnetic hole, 2-Cover plate, 3-Pin plate, 31-Pin hole, 32-Positioning plate, 33-Positioning hole, 34-Pin, 35-Second fixing block, 36-Sliding hole, 37-Magnetic rod, 38-End post, 39-Spring. Detailed Implementation
[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.
[0021] like Figure 1 As shown, this embodiment provides a power module pin fixture, including a placement plate 1, a cover plate 2, and a pin plate 3.
[0022] Specifically, such as Figure 1 As shown, the placement plate 1 is rectangular and has three placement cavities 11 running through it. The placement cavities 11 are arranged in an array along the length of the placement plate 1. The lower end of the inner wall of each placement cavity 11 has a placement edge 12 extending inward. The length and width of the placement cavity 11 are matched with the length and width of the power module to be welded, respectively. The distance between the upper surface of the placement edge 12 and the upper surface of the placement plate 1 is matched with the thickness of the power module to be welded. The placement cavity 11 is used to accommodate the power module to be welded, and the placement edge 12 is used to support the power module to be welded.
[0023] Specifically, such as Figure 1 As shown, the cover plate 2 is rectangular and its shape matches that of the placement plate 1. It is positioned above the placement plate 1 and is used to mate with the upper surface of the placement plate 1.
[0024] Specifically, such as Figure 1 As shown, the pin plate 3 is rectangular, its shape matches that of the placement plate 1, and it is located below the placement plate 1 for mating with the lower surface of the placement plate 1. The pin plate 3 includes three pin areas. More specifically, when the pin plate 3 mates with the lower surface of the placement plate 1, the three pin areas correspond exactly to the three placement cavities 11. Each pin area has a number of pin holes 31 in the same position. A positioning plate 32 is installed on the lower surface of each pin area on the pin plate 3. Each positioning plate 32 has a number of positioning holes 33 that match the number of pin holes 31 in one of the pin areas. The positioning holes 33 are coaxial with the pin holes 31 one by one. More specifically, the shape and size of the positioning holes 33 are matched with the PIN pins to be soldered.
[0025] During operation, the tinned power modules are placed sequentially in the placement cavity 11 with the tinned side facing the lower surface of the placement plate 1. The cover plate 2 is fitted onto the upper surface of the placement plate 1, covering the power modules in the placement cavity 11. The PIN pins are manually inserted sequentially from the upper end of the pin insertion hole 31, and the PIN pins are rotated moderately to insert into the positioning hole 33, with the lower end of the positioning hole 33 protruding. The pin insertion plate 3 with the inserted pins is fitted onto the lower surface of the placement plate 1. Then, the entire fixture is inverted, with the cover plate 2 at the bottom, placed on a horizontal table. The PIN pins slide to the corresponding tinning point of the power module, so that the pin seat of the PIN pin is combined with the tinning. Preferably, a counterweight can be used here to make the pin seat of the PIN pin more tightly combined with the tinning. After the placement plate 1, cover plate 2, and pin insertion plate 3 are assembled, they are placed in a hot air reflow oven for curing and soldering.
[0026] Preferred, such as Figure 1As shown, the upper surface of the placement plate 1 has four first magnetic holes 13, and the lower surface of the cover plate 2 has four magnetic blocks 14 whose positions match the first magnetic holes 13. The magnetic blocks 14 are used to cooperate with the first magnetic holes 13. The cooperation here means that the size of the magnetic block 14 matches the first magnetic hole 13, and the head of the magnetic block 14 and the bottom of the first magnetic hole 13 have magnetic attraction. When the head of the magnetic block 14 extends into the first magnetic hole 13 and contacts the bottom of the first magnetic hole 13, the cover plate 2 contacts the upper surface of the placement plate 1. The upper surface of the placement plate 1 has slots 15 at both ends. The two sides of the slots 15 extend to the inner wall of the placement cavity 11 located at the end of the array and the end face of the placement plate 1, respectively. The slots 15 are used to facilitate the separation of the cover plate 2 and the placement plate 1.
[0027] Preferred, such as Figure 1 As shown, the placement plate 1 has two through pin holes 16, and the upper surface of the pin plate 3 is provided with two pins 34 whose positions match the pin holes 16. The pins 34 are used to cooperate with the pin holes 16 to fix the position of the pin plate 3.
[0028] Preferred, such as Figure 2 As shown, a first fixing block 17 extends outward from each end of the placement plate 1, and a second fixing block 35 extends outward from each end of the pin plate 3. The lower surface of each of the first fixing blocks 17 has a second magnetic hole 18, and each of the second fixing blocks 35 has a through-hole 36. When the pin plate 3 mates with the placement plate 1, the through-holes 36 are coaxial with the second magnetic holes 18. Magnetic rods 37 slide through each through-hole 36. The upper end of the magnetic rod 37 mates with the second magnetic hole 18, and the lower end of the magnetic rod 37 is coaxially connected to an end post 38. The end post 38 is connected to the corresponding... Springs 39 are connected between the second fixing blocks 35. All springs 39 are coaxially sleeved around the magnetic rod 37. When the springs 39 are in their original state, the length of the upper end of the magnetic rod 37 extending out of the sliding hole 36 matches the depth of the second magnetic hole 18. This design allows the placement plate 1 and the pin plate 3 to fit more tightly. When it is necessary to separate the placement plate 1 and the pin plate 3, the end post 38 is placed on a horizontal surface and the placement plate 1 is moved downwards. This makes it relatively easy to separate the pin plate 3 from the placement plate 1, and the separation will not cause damage or displacement to the PIN pins.
[0029] The above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.
Claims
1. A power module pin fixture, characterized by, The utility model relates to a kind of pinboard and pinboard, including: Placement plate (1), multiple placement cavities (11) are passed through on it, placement cavity (11) is arrayed distribution along the length direction of placement plate (1), and the lower end of inner wall of placement cavity (11) is extended with placement edge (12) inward; Cover plate (2), when used, it is located above placement plate (1), for and the upper surface of placement plate (1) cooperation; Pinboard (3), when used, it is located below placement plate (1), for and the lower surface of placement plate (1) cooperation, pinboard (3) includes the pinboard area of quantity with placement cavity (11) matching, and the same number of pinhole (31) is passed through on each described pinboard area, the lower surface of each described pinboard area on pinboard (3) is equipped with positioning plate (32), and each positioning plate (32) is passed through the positioning hole (33) of number matching on one described pinhole (31) of pinboard area, positioning hole (33) is coaxially with pinhole (31) one-to-one correspondence.
2. The power module pin fixture of claim 1, wherein, Multiple first magnetic holes (13) are set on the upper surface of placement plate (1), and the lower surface of cover plate (2) is provided with magnetic block (14) of number and position matching in first magnetic hole (13), and magnetic block (14) is used for cooperating with first magnetic hole (13), and the both ends of the upper surface of placement plate (1) are provided with slot (15), and slot (15) is passed through to the inner wall of placement cavity (11) and the end face of placement plate (1) located at array end respectively.
3. The power module pin fixture of claim 1, wherein, Multiple pinholes (16) are passed through in placement plate (1), and the upper surface of pinboard (3) is provided with the pin (34) of number and position matching in pinhole (16), and pin (34) is used for cooperating with pinhole (16).
4. The power module pin fixture of claim 1, wherein, Multiple first fixed blocks (17) are extended outward at both ends of placement plate (1), and the both ends of pinboard (3) are extended outward with the second fixed block (35) of number matching in first fixed block (17), and the lower surface of first fixed block (17) is provided with second magnetic hole (18), and the upper surface of second fixed block (35) is passed through with slide hole (36), and slide hole (36) is coaxially with second magnetic hole (18) one-to-one correspondence, and magnetic rod (37) is slidably arranged in slide hole (36), and the upper end of magnetic rod (37) is used for cooperating with second magnetic hole (18), and the lower end of magnetic rod (37) is coaxially connected with end column (38), and spring (39) is connected between end column (38) and corresponding second fixed block (35), and spring (39) is coaxially sleeved on the circumferential side of magnetic rod (37), and when spring (39) is in original state, the length of the upper end of magnetic rod (37) that extends out of slide hole (36) matches the depth of second magnetic hole (18).