A stack-type board assembly device and an assembly method

Abstract

The present invention relates to a stack-type board assembly device and an assembly method. The stack-type board assembly device includes a linear drive mechanism, a mounting plate, a mounting frame, indexing pins, and a toggle block. The linear drive mechanism is mounted on the mounting plate. The mounting frame is mounted on the linear drive mechanism and performs linear motion under the drive of the linear drive mechanism. A stack assembly space is formed by enclosing between the mounting frame and the mounting plate. The indexing pins are movably mounted on the mounting frame and can be inserted and pulled out in a direction perpendicular to the mounting plate. The toggle block is rotatably mounted on the linear drive mechanism through a rotating shaft and performs linear motion under the drive of the linear drive mechanism. The toggle block is located below the mounting frame, and the rotating shaft is arranged parallel to the driving direction of the linear drive mechanism. The present invention uses the cooperation of the toggle block, the indexing pins, and the linear drive mechanism. For each installation of a PCBA board, the toggle block and the indexing pins are used for pressing and positioning, with high disassembly and assembly efficiency, convenient plugging and unplugging positioning of the pin headers, and the pin headers of the pin sockets are not easily deformed or detached.

Description

Technical Field

[0001] The present invention relates to the technical field of stackable boards, and particularly relates to a stackable board assembly device and an assembly method. Background Art

[0002] Small satellite integrated electronics generally adopt a stackable board design structure. When installing, generally pass copper posts through the base frame, and manually install the PCBA boards (PCBA boards represent finished circuit boards, and the boards with components soldered on the circuit boards) level by level. When installing to the middle frame, manually install the copper posts and PCBA boards at the other end level by level. Finally, level the platform and lock it. When disassembling, press the middle frame and manually disassemble from the outermost side, and disassemble one end and then the other end. In the existing manual disassembly method, two people are required to cooperate to insert and remove the row sockets between the PCBA boards, or a single person uses a screwdriver to pry open the row sockets between the PCBA boards unilaterally. When inserting and removing the PCBA boards, the existing technology cannot achieve the simultaneous force on the four corners of the PCBA board, and the row sockets are unevenly stressed. Due to the dense row socket pin holes on the PCBA board, it is not easy to insert and remove, and the insertion and removal tasks cannot be completed independently. Two or more people are required to pull out the PCBA board together, resulting in low efficiency. Inserting and removing the PCBA board by experience is very likely to cause deformation of the row socket pins, electrostatic breakdown of electronic components, falling off of electronic components due to force, and damage. The internal circuit of the PCB is damaged, and the PCBA board is damaged. When a single person uses a screwdriver to pry open the row socket, there is a risk of scratching the PCBA board and the PCBA board falling. Summary of the Invention

[0003] The present invention provides a stackable board assembly device and an assembly method to solve one or several of the technical problems existing in the prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: A stackable board assembly device includes a linear drive mechanism, a mounting plate, a mounting frame, a indexing pin, and a toggle block. The linear drive mechanism is mounted on the mounting plate. The mounting frame is mounted on the linear drive mechanism and performs a linear motion under the drive of the linear drive mechanism. A stack assembly space is formed by enclosing between the mounting frame and the mounting plate. The indexing pin is movably mounted on the mounting frame and can be movably inserted and removed in a direction perpendicular to the mounting plate. The toggle block is rotatably mounted on the linear drive mechanism through a rotating shaft and performs a linear motion under the drive of the linear drive mechanism. The toggle block is located below the mounting frame, and the rotating shaft is arranged parallel to the driving direction of the linear drive mechanism.

[0005] The beneficial effects of the present invention are as follows: The stack-type board assembly device of the present invention is used for satellite manufacturing. Satellite manufacturing is a complex systematic project, and quality control and efficiency have always been pain points that cannot be avoided in satellite manufacturing. Adhering to the original intention of nipping risks in the bud, the present invention uses a toggle block, a indexing pin, and a linear drive mechanism in cooperation to assemble PCBA boards. For each installed PCBA board, the toggle block and the indexing pin are used for pressing and positioning. The disassembly and assembly efficiency is high, which is convenient for the insertion and extraction positioning of the pin headers, and the pin headers of the pin sockets are not easily deformed and fall off.

[0006] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0007] Further, the mounting bracket has a structure similar to the Chinese character "ji", the top wall of the mounting bracket is arranged parallel to the mounting plate, and the indexing pin penetrates through the top wall of the mounting bracket and is elastically connected to the top wall.

[0008] The beneficial effect of adopting the above further solution is that the mounting bracket in the shape of "ji" is convenient for the assembly of the indexing pin and the operation of installing the PCBA board inside the mounting bracket.

[0009] Further, a limiting sleeve is provided on the top wall of the mounting bracket. The limiting sleeve penetrates through the top wall. A spring is provided inside the limiting sleeve. The indexing pin penetrates through the limiting sleeve and the spring. The upper end of the spring is connected to the inner side wall of the limiting sleeve, and the lower end of the spring is connected to the indexing pin; a limiting sliding hole is provided on the upper side wall of the upper end of the limiting sleeve, and the upper end of the limiting sliding hole is of an open structure; a bent section is provided at the upper end of the indexing pin, and the bent section movably penetrates through the limiting sliding hole and can move along the limiting sliding hole.

[0010] The beneficial effect of adopting the above further solution is that with the cooperation of the limiting sleeve, the spring and the indexing pin, when the indexing pin is required to limit the PCBA board, the indexing pin can move downward in the limiting sliding hole under the action of the spring; when the indexing pin is not required to limit the PCBA board, the indexing pin can be pulled upward, and the bent section of the indexing pin can be hooked on the top end of the limiting sleeve, which is very convenient and reliable.

[0011] Further, there are at least two limiting sleeves, and each limiting sleeve is provided with the spring and the indexing pin inside.

[0012] The beneficial effect of adopting the above further solution is that the PCBA board can be stably limited.

[0013] Further, a limiting groove is provided on the lower end face of the indexing pin, and a limiting plane is provided on each of the front and rear sides of the lower end of the indexing pin, and the limiting groove penetrates through the two limiting planes.

[0014] The beneficial effects of adopting the above further scheme are: the setting of the limiting groove can abut on the copper column to abut and limit the copper column and the screw pin; the setting of the limiting plane can abut on the PCBA board to abut and limit the front side or the rear side of the PCBA board.

[0015] Furthermore, there are at least two toggle blocks, and at least one toggle block is disposed on each of the two sides below the mounting frame.

[0016] The beneficial effect of adopting the above further solution is that it is convenient to abut and limit the two corners at the lower end of the PCBA board.

[0017] Furthermore, the linear drive mechanism includes a lead screw, a lead screw nut, a sliding shaft and a sliding block, the two ends of the lead screw are rotatably connected to the mounting plate via bearings, the lead screw nut is threadedly connected to the lead screw, the two ends of the sliding shaft are fixed to the mounting plate, the sliding block is slidably connected to the sliding shaft, and the lead screw is arranged parallel to the sliding shaft; the two sides of the lower end of the mounting frame are respectively fixed to the sliding block and the lead screw nut; the sliding block and / or the lead screw nut are rotatably connected to the toggle block via a rotating shaft.

[0018] The beneficial effect of adopting the above further solution is: the screw nut linear drive mechanism can stably drive the mounting frame to move forward and backward, thereby providing stable and effective limit support for the PCBA board.

[0019] Furthermore, the sliding block is provided with a first L-shaped mounting block on one side relative to the lead screw nut, and the lead screw nut is provided with a second L-shaped mounting block on one side relative to the sliding block, the first L-shaped mounting block and the second L-shaped mounting block are symmetrically arranged, and the free end of the first L-shaped mounting block and the free end of the second L-shaped mounting block are both horizontally arranged and provided with a rotating shaft.

[0020] The beneficial effect of adopting the above further solution is that the L-shaped mounting block is adopted to facilitate the effective assembly of the toggle block.

[0021] Further, the front end face of the toggle block and the front end face of the lower end of the indexing pin are located in the same vertical plane, or / and, the rear end face of the toggle block and the rear end face of the lower end of the indexing pin are located in the same vertical plane.

[0022] The beneficial effect of adopting the above further solution is that it is convenient to effectively abut and limit the front side or the rear side of the PCBA board.

[0023] A stacked board assembly method is implemented using the stacked board assembly device, comprising the following steps:

[0024] Fix the stack base frame on the mounting plate. Insert screw pin columns through the four corners of the stack base frame, and sleeve four copper columns. Insert the first PCBA board through the screw pin columns, and then sleeve four copper columns. Sleeve the second PCBA board onto the screw pin columns. Align the socket contact points of the two PCBA boards. Pull the indexing pin upward and adjust the toggle block to a vertical state. Use the linear drive mechanism to move the mounting bracket backward to the rear side of the second PCBA board. Release the indexing pin downward and adjust the toggle block to a horizontal state. Then use the linear drive mechanism to press the indexing pin against the upper rear end of the second PCBA board and press the toggle block against the lower rear end of the second PCBA board. Install all the PCBA boards onto the screw pin columns in sequence.

[0025] The beneficial effects of the present invention are as follows: The stackable board card assembly method of the present invention has high disassembly and assembly efficiency, is convenient for the insertion and extraction positioning of socket pins, and the socket pins are not easily deformed or detached.

[0026] Furthermore, it also includes leveling. Specifically, loosen the nuts connecting the screw pin columns on the stack base frames at the front and rear sides of all PCBA boards, release the stress and then tighten them. Measure the gaps between the metal frames of the stack base frame and the PCBA boards and the mounting plate. When the gap is greater than 0.2 mm, loosen the screw pin columns again, correct the mounting plane, and then apply thread glue to the threads of the screw pin columns and tighten the screw pin columns. Description of the Drawings

[0027] Figure 1 It is a schematic side view structure diagram of the stackable board card assembly device of the present invention;

[0028] Figure 2 It is a schematic front view structure diagram of the first state of the stackable board card assembly device of the present invention;

[0029] Figure 3 is Figure 2 an enlarged structure diagram of part A in

[0030] Figure 4 It is a schematic top view structure diagram of the stackable board card assembly device of the present invention;

[0031] Figure 5 It is a schematic front view structure diagram of the second state of the stackable board card assembly device of the present invention;

[0032] Figure 6 It is a schematic cross-sectional view structure diagram of the rear side of the third state of the stackable board card assembly device of the present invention;

[0033] Figure 7 It is a schematic cross-sectional view structure diagram of the front side of the third state of the stackable board card assembly device of the present invention.

[0034] In the drawings, the list of components represented by each reference numeral is as follows:

[0035] 1. Mounting plate

[0036] 2. Mounting frame; 21. Top wall; 22. Limit sleeve; 23. Limit sliding hole

[0037] 3. Pushing block; 31. Rotating shaft; 32. First L-shaped mounting block

[0038] 4. Indexing pin; 41. Bent section; 42. Limit notch; 43. Limit plane

[0039] 5. Lead screw; 51. Lead screw nut; 52. Sliding shaft; 53. Sliding block; 54. Operating handle; 55. Bearing

[0040] 6. PCBA board; 61. Screw pin column; 62. Copper column

[0041] 7. Stacking base frame; 71. Metal frame Specific embodiments

[0042] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0043] As Figures 1 to 7 shown, a stacking type board card assembly device in this embodiment includes a linear drive mechanism, a mounting plate 1, a mounting frame 2, an indexing pin 4, and a pushing block 3. The linear drive mechanism is installed on the mounting plate 1. The mounting frame 2 is installed on the linear drive mechanism and performs linear motion under the drive of the linear drive mechanism. A stacking assembly space is formed by enclosing between the mounting frame 2 and the mounting plate 1. The indexing pin 4 is movably installed on the mounting frame 2 and can be movably inserted and pulled out in a direction perpendicular to the mounting plate 1. The pushing block 3 is rotatably installed on the linear drive mechanism through a rotating shaft 31 and performs linear motion under the drive of the linear drive mechanism. The pushing block 3 is located below the mounting frame 2, and the rotating shaft 31 is arranged parallel to the driving direction of the linear drive mechanism.

[0044] As Figure 2 、 Figures 5 to 7 shown, the mounting frame 2 in this embodiment has a structure similar to a "Ji" character. The top wall 21 of the mounting frame 2 is arranged parallel to the mounting plate 1. The indexing pin 4 penetrates through the top wall 21 of the mounting frame 2 and is elastically connected to the top wall 21. The mounting frame in the shape of a "Ji" character facilitates the assembly of the indexing pin and the operation of installing the PCBA board inside the mounting frame. Preferably, the mounting frame 2 has an isosceles trapezoid structure, and the space below the top wall 21 is used for operating and assembling the PCBA board 6.

[0045] As Figure 1 、 Figure 2 and Figure 5As shown, a limiting sleeve 22 is provided on the top wall 21 of the mounting frame 2 of the present embodiment, and the limiting sleeve 22 is arranged through the top wall 21, a spring is provided in the limiting sleeve 22, and the indexing pin 4 is arranged through the limiting sleeve 22 and the spring, the upper end of the spring is connected to the inner wall of the limiting sleeve 22, and the lower end of the spring is connected to the indexing pin 4; a limiting sliding hole 23 is provided on the upper end side wall of the limiting sleeve 22, and the upper end of the limiting sliding hole 23 is an open structure; a bending section 41 is provided on the upper end of the indexing pin 4, and the bending section 41 movably penetrates the limiting sliding hole 23 and can move along the limiting sliding hole 23. By adopting the cooperation of the limiting sleeve, spring and indexing pin, when the indexing pin is needed to limit the PCBA board, the indexing pin can move downward in the limiting sliding hole under the action of the spring; when the indexing pin is not needed to limit the PCBA board, the indexing pin can be pulled upward and the bent section of the indexing pin can be hung on the top of the limiting sleeve, which is very convenient and reliable.

[0046] like Figure 1 , Figure 2 , Figures 4 to 7 As shown, in this embodiment, there are at least two limiting sleeves 22, each of which is provided with the spring and the indexing pin 4, so as to stably limit the PCBA board 6. Preferably, two limiting sleeves 22 are provided, and the two limiting sleeves are located above the two toggle blocks.

[0047] like Figure 2 and Figure 3 As shown, the lower end face of the indexing pin 4 of this embodiment is provided with a limit notch 42, and the front and rear sides of the lower end of the indexing pin 4 are each provided with a limit plane 43, and the limit notch 42 is arranged through two limit planes 43. The setting of the limit notch can abut on the copper column to abut and limit the copper column and the screw pin; the setting of the limit plane can abut on the PCBA board to abut and limit the front side or the rear side of the PCBA board.

[0048] like Figure 2 , Figures 5 to 7 As shown, there are at least two toggle blocks 3 in this embodiment, and at least one toggle block 3 is provided on each of the two sides below the mounting frame 2. This facilitates the abutment and limiting of the two corners at the lower end of the PCBA board.

[0049] like Figures 1 to 7As shown in the figure, the linear drive mechanism of this embodiment includes a lead screw 5, a lead screw nut 51, a sliding shaft 52, and a sliding block 53. The two ends of the lead screw 5 are rotatably connected to the mounting plate 1 through bearings 55. The lead screw nut 51 is threadedly connected to the lead screw 5. The two ends of the sliding shaft 52 are fixed to the mounting plate 1. The sliding block 53 is slidably connected to the sliding shaft 52. The lead screw 5 and the sliding shaft 52 are arranged in parallel. The lower ends on both sides of the mounting frame 2 are respectively fixed to the sliding block 53 and the lead screw nut 51. A toggle block 3 is rotatably connected to the sliding block 53 and / or the lead screw nut 51 through a rotating shaft 31. By using a lead screw nut linear drive mechanism, the mounting frame can be stably driven to move back and forth, thereby stably and effectively limiting and supporting the PCBA board.

[0050] As Figures 5 to 7 shown in the figure, on one side of the sliding block 53 of this embodiment relative to the lead screw nut 51, there is a first L-shaped mounting block 32. On one side of the lead screw nut 51 relative to the sliding block 53, there is a second L-shaped mounting block. The first L-shaped mounting block 32 and the second L-shaped mounting block are symmetrically arranged. The free end of the first L-shaped mounting block 32 is horizontally arranged and is provided with a first rotating shaft. The free end of the second L-shaped mounting block is horizontally arranged and is provided with a second rotating shaft. The toggle block 3 is provided on both the first rotating shaft and the second rotating shaft. By using L-shaped mounting blocks, it is convenient to effectively assemble the toggle blocks. It should be noted that when the toggle block 3 is toggled to the horizontal state, the toggle block 3 will not interfere with the screw pin 61, that is, the toggle block 3 only abuts and limits the PCBA board, and there is a gap reserved between the toggle block 3 and the adjacent screw pins.

[0051] The front end face of the toggle block 3 of this embodiment and the front end face of the lower end of the indexing pin 4 are located in the same vertical plane, or / and, the rear end face of the toggle block 3 and the rear end face of the lower end of the indexing pin 4 are located in the same vertical plane. It is convenient to effectively abut and limit the front side or the rear side of the PCBA board.

[0052] One end of the lead screw 5 of this embodiment is connected with an operating handle 54, which is convenient for operation.

[0053] The stack-type board card assembly device of this embodiment is used for satellite manufacturing. Satellite manufacturing is a complex systematic project. Quality control and efficiency have always been pain points that cannot be avoided in satellite manufacturing. Adhering to the original intention of nipping risks in the bud, the present invention uses a toggle block, an indexing pin, and a linear drive mechanism in cooperation to assemble the PCBA board. Every time a PCBA board is installed, the toggle block and the indexing pin are used for pressing and positioning. The disassembly and assembly efficiency is high, which is convenient for the insertion and extraction positioning of the pin headers. The pin headers of the pin sockets are not easily deformed and detached.

[0054] This embodiment also provides a method for assembling stackable boards, which is implemented by using the above-mentioned stackable board assembly device, and includes the following steps:

[0055] Fix the stack base frame 7 on the mounting plate 1. Insert screw pins 61 through the four corners of the stack base frame 7, and sleeve four copper posts 62. Insert the first PCBA board 6 through the screw pins 61, and then sleeve four copper posts 62. Sleeve the second PCBA board 6 onto the screw pins 61. Align the socket contact points of the two PCBA boards 6. Pull the indexing pin 4 upward (i.e., the state shown in Figure 5 , which is the zero position state), and adjust the toggle block 3 to the vertical state (i.e., the state shown in Figure 5 , which is also the zero position state); Use the linear drive mechanism to move the mounting bracket 2 backward to the rear side of the second PCBA board 6. Release the indexing pin 4 downward (i.e., the state shown in Figure 6 , which is the 90° position state), and adjust the toggle block 3 to the horizontal state (i.e., the state shown in Figure 6 , which is the 90° position state). Then use the linear drive mechanism to press the indexing pin 4 against the upper end of the rear side of the second PCBA board 6 ( Figure 6 The PCBA board in is the second PCBA board), and press the toggle block 3 against the lower end of the rear side of the second PCBA board 6; Install all PCBA boards 6 onto the screw pins 61 in sequence ( Figure 7 The PCBA board in is the third PCBA board), and then sleeve a stack base frame 7 onto the screw pins 61 on the rear sides of all PCBA boards, and tighten and fix it with nuts.

[0056] Among them, Figure 1 and Figure 2 show the state of the stackable board assembly device after completing the stacking of PCBA boards.

[0057] After installing all PCBA boards in the stackable board assembly method of this embodiment, leveling is also required. Specifically, loosen the nuts connecting the screw pins 61 on the front and rear stack base frames 7 of all PCBA boards, release the stress and then tighten them. Measure the gap between the metal frame of the stack base frame and the PCBA board and the mounting plate with a feeler gauge in the natural state. When it is greater than 0.2 mm, loosen the screw pins, correct the installation plane, then apply low-strength thread glue to the threads of the screw pins, tighten the torque, draw a marking line, and apply GD414 to seal the screw seat of the screw pins. When disassembling the PCB, manually remove the stack base frame 7, adjust the indexing pin and the toggle block to the zero position state, fix the stack of PCBA boards, rotate the lead screw with the operating handle 54, move the indexing pin and the toggle block to the PCBA board and press them, and then disassemble one PCBA board at the rear side of this PCBA board. Disassemble all PCBA boards in sequence.

[0058] The stack-type board assembly method of this embodiment has high disassembly and assembly efficiency, facilitates the insertion and extraction positioning of the pin headers, and the pins of the pin headers are not easily deformed or detached.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0060] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A stackable board assembly device, characterized in that, It includes a linear drive mechanism, a mounting plate, a mounting bracket, indexing pins and toggle blocks. The linear drive mechanism is mounted on the mounting plate. The mounting bracket is mounted on the linear drive mechanism and performs linear motion under the drive of the linear drive mechanism. A stack assembly space is formed by enclosing between the mounting bracket and the mounting plate. The indexing pins are movably mounted on the mounting bracket and can be inserted and pulled out in a direction perpendicular to the mounting plate. The toggle blocks are rotatably mounted on the linear drive mechanism through a rotating shaft and perform linear motion under the drive of the linear drive mechanism. The toggle blocks are located below the mounting bracket, and the rotating shaft is arranged parallel to the driving direction of the linear drive mechanism. A limiting sleeve is provided on the top wall of the mounting bracket. The limiting sleeve penetrates through the top wall. A spring is provided inside the limiting sleeve. The indexing pin penetrates through the limiting sleeve and the spring. The upper end of the spring is connected to the inner side wall of the limiting sleeve, and the lower end of the spring is connected to the indexing pin. A limiting sliding hole is provided on the upper side wall of the limiting sleeve. There are at least two limiting sleeves, and a spring and an indexing pin are provided in each limiting sleeve. There are at least two toggle blocks, and at least one toggle block is provided on each of the two sides below the mounting bracket. The toggle blocks are rotatably connected to the sliding block and / or the lead screw nut of the linear drive mechanism through a rotating shaft. The front end face of the toggle block and the front end face of the lower end of the indexing pin are located in the same vertical plane, and / or the rear end face of the toggle block and the rear end face of the lower end of the indexing pin are located in the same vertical plane.

2. The stackable board assembly device according to claim 1, wherein The mounting bracket has a structure similar to the shape of "ji". The top wall of the mounting bracket is parallel to the mounting plate. The indexing pin penetrates through the top wall of the mounting bracket and is elastically connected to the top wall.

3. The stackable board assembly device according to claim 2, characterized in that, The upper end of the limiting sliding hole is of an open structure. A bent section is provided at the upper end of the indexing pin. The bent section movably penetrates through the limiting sliding hole and can move along the limiting sliding hole.

4. The stackable board assembly device according to claim 3, wherein A limiting notch is provided on the lower end face of the indexing pin. A limiting plane is provided on each of the front and rear sides of the lower end of the indexing pin. The limiting notch penetrates through the two limiting planes.

5. The stackable board assembly device according to claim 1, wherein The linear drive mechanism includes a lead screw, a lead screw nut, a sliding shaft and a sliding block. The two ends of the lead screw are rotatably connected to the mounting plate through bearings. The lead screw nut is threadedly connected to the lead screw. The two ends of the sliding shaft are fixed to the mounting plate. The sliding block is slidably connected to the sliding shaft. The lead screw is arranged parallel to the sliding shaft. The two sides of the lower end of the mounting bracket are respectively fixed to the sliding block and the lead screw nut.

6. The stackable board assembly device according to claim 5, wherein, A first L-shaped mounting block is provided on one side of the sliding block relative to the lead screw nut. A second L-shaped mounting block is provided on one side of the lead screw nut relative to the sliding block. The first L-shaped mounting block and the second L-shaped mounting block are symmetrically arranged. The free ends of the first L-shaped mounting block and the second L-shaped mounting block are both horizontally arranged and provided with rotating shafts.

7. A stack-type board assembly method, characterized in that, It is realized by using the stack-type board card assembly device according to any one of claims 1 to 6, and includes the following steps: Fix the stack base frame on the mounting plate. Insert screw pin posts through the four corners of the stack base frame and slip four copper posts over them. Thread the first PCBA board onto the screw pin posts and then slip four copper posts over it. Slip the second PCBA board onto the screw pin posts. Align the socket contact points of the two PCBA boards. Pull the indexing pin upward and adjust the toggle block to a vertical state. Use the linear drive mechanism to move the mounting bracket backward to the rear side of the second PCBA board. Release the indexing pin downward and adjust the toggle block to a horizontal state. Then use the linear drive mechanism to press the indexing pin against the upper rear side of the second PCBA board and press the toggle block against the lower rear side of the second PCBA board. Install all the PCBA boards onto the screw pin posts in sequence.

8. The stackable board assembly method according to claim 7, characterized in that, It also includes leveling. Specifically, loosen the nuts connecting the screw pin posts on the stack base frames on the front and rear sides of all the PCBA boards, and then tighten them again after releasing the stress. Measure the gaps between the metal frames and the mounting plate of the stack base frame and the PCBA boards. When the gap is greater than 0.2 mm, loosen the screw pin posts again, correct the mounting plane, then apply thread glue to the threads of the screw pin posts and tighten the screw pin posts.

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