Replaceable universal support used in solder paste printing process of PCBA (printed circuit board assembly) production

Abstract

The invention belongs to the technical field of PCBA production, and particularly relates to a replaceable universal support in the solder paste printing process of PCBA production, which comprises two bases, two connecting and fixing pins are arranged on the bottom surface of each base, the bases are connected with printing equipment through the two connecting and fixing pins, a plurality of adsorption magnets are arranged on each base, and the adsorption magnets are connected with the printing equipment through the connecting and fixing pins. Height fixing blocks are fixedly connected to the top faces of the two bases, pin fixing iron blocks are fixedly connected to the top faces of the height fixing blocks, and customized printing supporting plates are placed on the top faces of the two pin fixing iron blocks. According to the customized printing supporting plate, rapid replacement of the supporting plates is achieved through pin connection, the supporting plates can be independently replaced only by disassembling the pins during remodeling, the base does not need to be disassembled and assembled, the remodeling time is greatly shortened, meanwhile, the efficiency is improved, and meanwhile the production cost is reduced. Quick positioning of the base and a printing machine table is achieved through magnet attraction, and the disassembly and assembly efficiency and operation convenience are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of PCBA production, and particularly relates to a replaceable universal support in a tin paste printing process of PCBA production. BACKGROUND

[0002] In the PCBA production process in the field of SMT, tin paste printing, as a core link for ensuring welding quality and reliability, directly affects the final performance of products. The process prints tin paste onto PCB pads through a steel mesh, and the printing effect highly depends on the stability of PCB in the printing process. If PCB is suspended, warped or deformed in the supporting state, problems such as uneven tin paste thickness, printing pattern deviation and even missing printing will occur, which seriously affects the yield of subsequent component mounting and reflow soldering. Therefore, the printing machine workbench usually needs to be equipped with a special support device to ensure that the PCB printing surface and the lower surface of the steel mesh are strictly coplanar and seamlessly attached.

[0003] Traditional support plates are usually made of aluminum alloy or engineering plastic and are fixed on the printing machine workbench through buckles or bolts. Although such integrated support plates can provide complete and uniform support interfaces and effectively prevent PCB deformation, they have obvious limitations in design. The replacement process is low in efficiency and complicated in operation, often requiring multiple people to cooperate to complete, and the positioning and alignment are difficult, which prolongs the replacement cycle. At the same time, the skill requirements of the operator are high, and the replacement quality highly depends on the experience and proficiency of the personnel, which is not conducive to the rapid response and flexible production needs of the production line. In view of this, we propose a replaceable universal support in a tin paste printing process of PCBA production. SUMMARY

[0004] The purpose of the present application is to provide a replaceable universal support in a tin paste printing process of PCBA production to solve the problems raised in the background.

[0005] Therefore, the present application provides a replaceable universal support in a tin paste printing process of PCBA production, which comprises: Two bases, the bottom surface of each of the two bases is provided with two connecting fixed pins, and the base is connected with the printing equipment through the two connecting fixed pins, a plurality of adsorption magnets are arranged on each of the two bases, a height fixing block is fixedly connected to the top surface of each of the two bases, a pin fixed iron block is fixedly connected to the top surface of the height fixing block, and a customized printing support plate is placed on the top surface of each of the two pin fixed iron blocks; A plurality of positioning holes are respectively formed in the two customized printing support plates, and a support plate connecting pin is arranged in each of the plurality of positioning holes, and the two pin fixed iron blocks and the two customized printing support plates are connected by the plurality of support plate connecting pins; A supporting plate is arranged between the two customized printing supporting plates.

[0006] In the above technical solution, further comprising: A plurality of first limiting grooves are respectively arranged in the two customized printing supporting plates and are connected to the outside. A plurality of limiting rods are slidably connected in the first limiting grooves, and the limiting rods are fixedly connected to the two sides of the supporting plate. A plurality of lead screws are respectively threadedly connected in the two customized printing supporting plates. A rotating assembly is arranged in the supporting plate and is used to drive the plurality of lead screws to rotate.

[0007] In the above technical solution, further, the rotating assembly comprises: A plurality of gear grooves are arranged in the supporting plate. A first bevel gear and a second bevel gear are rotatably connected in the gear grooves. The first bevel gear and the second bevel gear are meshed with each other. One end of the first bevel gear extends into the two customized printing supporting plates and is fixedly connected to the plurality of lead screws. Two rotating grooves are arranged in the supporting plate and are connected to the plurality of gear grooves. A connecting rod is rotatably connected in the rotating grooves. Two ends of the connecting rod extend into the plurality of gear grooves and are fixedly connected to the plurality of second bevel gears. An activity groove is arranged in the supporting plate and is connected to the two gear grooves. Two synchronous wheels are rotatably connected in the activity groove. One end of the synchronous wheel extends into the two gear grooves and is fixedly connected to one end of the connecting rod. The two synchronous wheels are meshed with a synchronous belt. A first through groove is arranged on the inner wall of the activity groove and is connected to the outside. A rotating rod is rotatably connected in the first through groove. One end of the rotating rod extends into the activity groove and is fixedly connected to one of the synchronous wheels.

[0008] In the above technical solution, further, one end of the first bevel gear is rotatably connected to the two customized printing supporting plates. Two ends of the connecting rod are rotatably connected to the plurality of gear grooves.

[0009] In the above technical solution, further, one end of the first bevel gear is rotatably connected to the two customized printing supporting plates. Two ends of the connecting rod are rotatably connected to the plurality of gear grooves.

[0010] In the above technical solution, further comprising: Two fixed blocks, two said fixed blocks are fixedly connected on one side of the supporting plate, and two fixed blocks are located on the upper and lower sides of the rotating rod respectively, two said fixed blocks are rotatably connected with clamping blocks, and two clamping blocks are attached to the circumferential side of the rotating rod; The extrusion assembly is located in the rotating rod and is used for extruding the two clamping blocks.

[0011] In the above technical solution, further, the extrusion assembly comprises: A second limiting groove is provided in the rotating rod and is connected with the outside, a sliding block is slidably connected in the second limiting groove, two extrusion blocks are fixedly connected on one side of the sliding block, and a bolt is screwedly connected in the sliding block; A second through groove is provided on the inner wall of the second limiting groove and is connected with the outside, a first rotating block is rotatably connected in the second through groove, and one end of the first rotating block extends into the second limiting groove and is fixedly connected with the bolt.

[0012] In the above technical solution, further, the clamping block is inclined, and the bolt is rotatably connected in the second limiting groove.

[0013] In the above technical solution, further, the extrusion block is inclined, and one end of the first rotating block is rotatably connected with the second limiting groove.

[0014] In the above technical solution, further, it further comprises: A third limiting groove is provided on the inner wall of the movable groove, a tensioning wheel is slidably connected in the third limiting groove, and the tensioning wheel is attached to the synchronous belt, a screw rod is rotatably connected in the tensioning wheel, one end of the screw rod penetrates through the inner wall of the third limiting groove and extends to the outside and is screwedly connected with the supporting plate, and a second rotating block is fixedly connected to the bottom end of the screw rod.

[0015] The beneficial effects of the present application are: 1. The PCBA production tin paste printing process can replace the general support, the connecting fixed pin, the adsorption magnet, the support plate connecting pin, the pin fixed iron block, the height fixed block, the customized printing support plate, the positioning hole, the base, and the supporting plate are arranged, so that the user can quickly disassemble the whole device, the structure is designed, the customized printing support plate is connected and separated between the base, the height fixed block, and the pin fixed iron block through a plurality of support plate connecting pins, when replacing different models of PCB, only the corresponding pin needs to be disassembled, and the customized printing support plate can be replaced alone, without disassembling the whole base structure, so that the model changing operation time is greatly shortened, meanwhile, a plurality of adsorption magnets arranged in the device are adsorbed with the printing machine table, so that the base can be quickly and accurately positioned to the preset position of the workbench, and the positioning efficiency and operation convenience of the whole device in the disassembly process are further improved.

[0016] 2. The PCBA production tin paste printing process can replace the universal support, the user can control two customized printing support plates to move away from each other through the setting of the lead screw, the gear groove, the first bevel gear, the second bevel gear, the rotating groove, the connecting rod, the movable groove, the synchronous wheel, the synchronous belt, the first through groove and the rotating rod, and the two customized printing support plates can only move within a fixed range through the setting of the first limiting groove and the limiting rod. The design of the above structure allows the user to adjust the distance between the two customized printing support plates according to the position of the two bases, thereby improving the adaptation range of the overall device.

[0017] 3. The PCBA production tin paste printing process can replace the universal support, the clamping block can rotate on the fixed block through the setting of the fixed block and the clamping block, the sliding block can drive the two extrusion blocks to extrude the two clamping blocks through the setting of the second limiting groove, the sliding block, the extrusion block, the bolt, the second through groove and the first rotating block. The design of the above structure allows the two clamping blocks to clamp the rotating rod, which is fixed in the first through groove and cannot rotate, preventing the rotating rod from being affected by external factors and rotating, thereby improving the stability of the overall device.

[0018] 4. The PCBA production tin paste printing process can replace the universal support, the tensioning wheel can move along the third limiting groove through the setting of the third limiting groove and the tensioning wheel, and the user can move the tensioning wheel through the setting of the screw rod and the second rotating block, ensuring that the user can extrude the synchronous belt through the tensioning wheel, thereby adjusting the tension of the synchronous belt, and further improving the stability of the overall device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The overall structure of the present application is shown in the figure; Figure 2 The cross-sectional structure of the customized printing support plate and the supporting plate in the present application is shown in the figure; Figure 3 The internal structure of the customized printing support plate and the supporting plate in the present application is shown in the figure; Figure 4 The internal structure of the customized printing support plate and the supporting plate in the present application is shown in the figure; Figure 3 Figure 5 The internal structure of the rotating rod in the present application is shown in the figure; Figure 6 The internal structure of the rotating rod in the present application is shown in the figure; Figure 7 The internal structure of the third limiting groove in the present application is shown in the figure; Figure 8 The internal structure of the third limiting groove in the present application is shown in the figure. ​

[0020] The figure is marked as: 1, connecting fixed pin; 2, adsorption magnet; 3, support plate connecting pin; 4, pin fixed iron block; 5, height fixed block; 6, customized printed support plate; 7, positioning hole; 8, base; 9, supporting plate; 10, first limiting groove; 11, limiting rod; 12, screw rod; 13, gear groove; 14, first bevel gear; 15, second bevel gear; 16, rotating groove; 17, connecting rod; 18, movable groove; 19, synchronous wheel; 20, synchronous belt; 21, first through groove; 22, rotating rod; 23, fixed block; 24, clamping block; 25, second limiting groove; 26, sliding block; 27, extrusion block; 28, bolt; 29, second through groove; 30, first rotating block; 31, third limiting groove; 32, tensioning wheel; 33, screw rod; 34, second rotating block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and devices known to those skilled in the art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0023] It should be noted that the terms "first", "second", and the like in the description and claims of the application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of such terms as "first" and "second" are arbitrary labels and are used merely for purposes of nomenclature. Unless specifically stated otherwise, it is intended that the application is not limited to the specific order or hierarchy presented. Furthermore, it should be understood that the data used and the sequence of steps presented are examples and that other data and steps could be used.

[0024] It should be noted that in the description of the present application, the orientation or positional relationship indicated by the terms such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without making the opposite statement, these orientation terms do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the scope of protection of the present application; the orientation terms "inner, outer" refer to the inner and outer of the profile of each component itself.

[0025] It should be noted that in the present application, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0026] Embodiment 1: Please refer to Figure 1 - Figure 8 As shown in the drawings, the embodiment provides a replaceable universal support in the tin paste printing process of PCBA production, which comprises: Two bases 8, the bottom surface of the two bases 8 is provided with two connecting fixed pins 1, and the base 8 is connected with the printing equipment through the two connecting fixed pins 1, a plurality of adsorption magnets 2 are arranged on the two bases 8, the top surface of the base 8 is fixedly connected with a height fixing block 5, the top surface of the height fixing block 5 is fixedly connected with a pin fixed iron block 4, and the top surface of the two pin fixed iron blocks 4 is placed with a customized printing support plate 6; A plurality of positioning holes 7 are formed in the two customized printing support plates 6, and a support plate connecting pin 3 is arranged in each of the plurality of positioning holes 7, and the two pin fixed iron blocks 4 and the two customized printing support plates 6 are connected by the plurality of support plate connecting pins 3; A supporting plate 9 is arranged between the two customized printing support plates 6.

[0027] Embodiment 2: The embodiment provides a replaceable universal support in a tin paste printing process of PCBA production, in addition to the technical scheme of the above embodiment, further has the following technical features, and further includes: A plurality of first limiting grooves 10 are formed in the two customized printing support plates 6 and are connected with the outside, a limiting rod 11 is slidably connected in each of the plurality of first limiting grooves 10, and the plurality of limiting rods 11 are fixedly connected with the two sides of the supporting plate 9; A plurality of lead screws 12 are threadedly connected in the two customized printing support plates 6; A rotating assembly is located in the supporting plate 9 and is used to drive the plurality of lead screws 12 to rotate.

[0028] Embodiment 3: The embodiment provides a replaceable universal support in a tin paste printing process of PCBA production, in addition to the technical scheme of the above embodiment, further has the following technical features, and the rotating assembly includes: A plurality of gear grooves 13 are formed in the supporting plate 9, a first bevel gear 14 and a second bevel gear 15 are rotatably connected in each of the plurality of gear grooves 13, the first bevel gear 14 and the second bevel gear 15 are meshed with each other, one end of each of the plurality of first bevel gears 14 extends into the two customized printing support plates 6 and is fixedly connected with the plurality of lead screws 12; Two rotating grooves 16 are formed in the supporting plate 9 and are connected with the plurality of gear grooves 13, a connecting rod 17 is rotatably connected in each of the two rotating grooves 16, and the two ends of the connecting rod 17 extend into the plurality of gear grooves 13 and are fixedly connected with the plurality of second bevel gears 15; The movable groove 18 is opened in the tray 9 and is connected to two of the gear grooves 13. Two synchronous pulleys 19 are rotatably connected in the movable groove 18, and one end of each of the two synchronous pulleys 19 extends into one of the two gear grooves 13 and is fixedly connected to one end of each of the two connecting rods 17. A synchronous belt 20 meshes between the two synchronous pulleys 19. The first through groove 21 is formed on the inner wall of the movable groove 18 and is connected to the outside. A rotating rod 22 is rotatably connected in the first through groove 21, and one end of the rotating rod 22 extends into the movable groove 18 and is fixedly connected to one of the synchronous pulleys 19.

[0029] Example 4: This embodiment provides a replaceable universal support for solder paste printing in PCBA production. In addition to the technical solution of the above embodiment, it also has the following technical features: one end of several first bevel gears 14 is rotatably connected to two customized printing support plates 6, and the two ends of two connecting rods 17 are rotatably connected to several gear grooves 13.

[0030] Example 5: This embodiment provides a replaceable universal support for solder paste printing in PCBA production. In addition to the technical solution of the above embodiment, it also has the following technical features: one end of each of the two synchronous pulleys 19 is rotatably connected to one of the two gear slots 13, and the synchronous belt 20 is in contact with the inner wall of the movable slot 18.

[0031] Example 6: This embodiment provides a replaceable universal support for solder paste printing in PCBA production. In addition to the technical solutions described in the above embodiments, it also has the following technical features: Two fixing blocks 23 are fixedly connected to one side of the support plate 9, and the two fixing blocks 23 are located on the upper and lower sides of the rotating rod 22 respectively. Each fixing block 23 is rotatably connected to a clamping block 24, and the two clamping blocks 24 are in contact with the periphery of the rotating rod 22. The extrusion assembly is located inside the rotating rod 22 and is used to extrude the two clamping blocks 24.

[0032] Example 7: This embodiment provides a replaceable universal support for solder paste printing in PCBA production. In addition to the technical solutions described in the above embodiments, it also has the following technical features: the extrusion assembly includes: The second limiting groove 25 is opened inside the rotating rod 22 and is connected to the outside. A slider 26 is slidably connected inside the second limiting groove 25. Two pressing blocks 27 are fixedly connected to one side of the slider 26. A bolt 28 is threaded inside the slider 26. The second through groove 29 is arranged on the inner wall of the second limiting groove 25 and is connected with the outside, the first rotating block 30 is rotatably connected in the second through groove 29, and one end of the first rotating block 30 extends into the second limiting groove 25 and is fixedly connected with the bolt 28.

[0033] Embodiment 8: The embodiment provides a replaceable universal support in a tin paste printing process of PCBA production, in addition to the technical scheme of the above embodiment, further has the following technical features, the clamping block 24 is arranged in an inclined manner, the bolt 28 is located in the second limiting groove 25 and is rotatably connected with the second limiting groove 25.

[0034] Embodiment 9: The embodiment provides a replaceable universal support in a tin paste printing process of PCBA production, in addition to the technical scheme of the above embodiment, further has the following technical features, the extrusion block 27 is arranged in an inclined manner, one end of the first rotating block 30 is rotatably connected with the second limiting groove 25.

[0035] Embodiment 10: The embodiment provides a replaceable universal support in a tin paste printing process of PCBA production, in addition to the technical scheme of the above embodiment, further has the following technical features, further comprising: The third limiting groove 31 is arranged on the inner wall of the movable groove 18, the tension pulley 32 is slidably connected in the third limiting groove 31, the tension pulley 32 is attached to the synchronous belt 20, the screw rod 33 is rotatably connected in the tension pulley 32, one end of the screw rod 33 penetrates through the inner wall of the third limiting groove 31 and extends to the outside and is threadedly connected with the supporting plate 9, and the second rotating block 34 is fixedly connected to the bottom end of the screw rod 33.

[0036] Working principle: In use, the base 8 is fixedly connected with a printing device through the connecting fixing pin 1 at the bottom of the base 8, overall fixing is completed, a plurality of adsorbing magnets 2 are arranged on each base 8, the quick positioning and stability of the base 8 on the device table are further assisted through magnetic adsorption, the height fixing block 5 and the pin fixed iron block 4 at the top of the base 8 can be stably installed on the printing device, then the two supporting plate connecting pins 3 are installed on the two pin fixed iron blocks 4 through cooperation between the supporting plate connecting pins 3 and the plurality of positioning holes 7, so that the user can quickly assemble the overall device, it is convenient to replace the corresponding customized printing support plate 6 according to different PCB models, thereby improving the production line adaptability and work efficiency. In use, when the user finds that the positioning holes 7 on the two customized printing support plates 6 cannot correspond to the mounting positions on the two pin fixed iron blocks 4, the user rotates the rotating rod 22 by hand, so that the rotating rod 22 drives one of the synchronous wheels 19 to rotate in the movable groove 18, and the one of the synchronous wheels 19 drives the other synchronous wheel 19 to rotate through the synchronous belt 20, so that the two synchronous wheels 19 drive the two connecting rods 17 to rotate in the two rotating grooves 16, respectively, so that the two ends of the two connecting rods 17 drive the second bevel gears 15 to rotate in the gear grooves 13, respectively, so that the second bevel gears 15 drive the first bevel gears 14 to rotate, respectively, so that the first bevel gears 14 drive the lead screws 12 to rotate, respectively, so that the two lead screws 12 on the left and the two lead screws 12 on the right rotate in opposite directions, and then, the two customized printing support plates 6 are subjected to the action of the threads of the lead screws 12, and move towards each other or away from each other, so as to ensure that the user can adjust the distance between the two customized printing support plates 6 according to the installation requirements. In use, the user rotates the first rotating block 30 by hand, so that the first rotating block 30 drives the bolt 28 to rotate in the second limiting groove 25, the sliding block 26 is subjected to the action of the threads of the bolt 28 and moves along the second limiting groove 25, the sliding block 26 drives the two extrusion blocks 27 to extrude the two clamping blocks 24, respectively, so as to make the two clamping blocks 24 rotate on the two fixed blocks 23 and extrude the rotating rod 22, so that the rotating rod 22 is fixed in the first through groove 21 and cannot rotate, and the rotating rod 22 is prevented from being affected by the outside and rotating. In use, the user rotates the second rotating block 34 by hand, so that the second rotating block 34 drives the screw rod 33 to rotate in the third limiting groove 31 and is subjected to the action of the threads on the inner wall of the third limiting groove 31, pushes the tensioning wheel 32 to move upwards along the third limiting groove 31, so as to extrude the synchronous belt 20, and ensure that the user can control the tension of the synchronous belt 20, and prevent the synchronous belt 20 from relaxing during long-term use.

[0037] The embodiments of the application are described above in combination with the drawings, and the embodiments and the features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. A replaceable universal support for solder paste printing during PCBA production, characterized in that, include: Two bases (8), each base (8) has two connecting pins (1) on its bottom surface, and the base (8) is connected to the printing equipment through the two connecting pins (1). Each base (8) has several adsorption magnets (2). Each base (8) has a height fixing block (5) fixedly connected to its top surface. Each height fixing block (5) has a pin fixing iron block (4) fixedly connected to its top surface. Each pin fixing iron block (4) has a custom printing support plate (6) placed on its top surface. A number of positioning holes (7) are respectively opened on two custom printing support plates (6). Each of the positioning holes (7) is provided with a support plate connecting pin (3), and the two pins fixing the iron block (4) and the two custom printing support plates (6) are connected by the pins of the support plate connecting pin (3). A tray (9) is disposed between two custom-printed support plates (6).

2. The replaceable universal support for solder paste printing in PCBA production according to claim 1, characterized in that, Also includes: Several first limiting grooves (10) are respectively opened in two customized printing support plates (6) and connected to the outside. Several first limiting grooves (10) are slidably connected to limiting rods (11), and several limiting rods (11) are fixedly connected to both sides of the support plate (9). Several lead screws (12) are threadedly connected to two custom-made printing support plates (6); A rotating assembly is located inside the support plate (9) and is used to drive several lead screws (12) to rotate.

3. A replaceable universal support for solder paste printing in PCBA production according to claim 2, characterized in that, The rotating assembly includes: A plurality of gear slots (13) are formed in the support plate (9). A first bevel gear (14) and a second bevel gear (15) are rotatably connected in each of the plurality of gear slots (13). The first bevel gear (14) and the second bevel gear (15) mesh with each other. One end of each of the plurality of first bevel gears (14) extends into two custom printing support plates (6) and is fixedly connected to a plurality of lead screws (12). Two rotating slots (16) are formed in the support plate (9) and are connected to several gear slots (13) respectively. A connecting rod (17) is rotatably connected in each of the two rotating slots (16), and the two ends of the two connecting rods (17) extend into several gear slots (13) respectively and are fixedly connected to several second bevel gears (15). The movable groove (18) is opened in the tray (9) and communicates with two of the gear grooves (13). Two synchronous pulleys (19) are rotatably connected in the movable groove (18), and one end of each of the two synchronous pulleys (19) extends into one of the two gear grooves (13) and is fixedly connected to one end of each of the two connecting rods (17). A synchronous belt (20) meshes between the two synchronous pulleys (19). The first through groove (21) is opened on the inner wall of the movable groove (18) and is connected to the outside. A rotating rod (22) is rotatably connected in the first through groove (21), and one end of the rotating rod (22) extends into the movable groove (18) and is fixedly connected to one of the synchronous pulleys (19).

4. A replaceable universal support for solder paste printing in PCBA production according to claim 3, characterized in that, One end of several first bevel gears (14) is rotatably connected to two custom printing support plates (6), and the two ends of the two connecting rods (17) are rotatably connected to several gear slots (13).

5. A replaceable universal support for solder paste printing in PCBA production according to claim 3, characterized in that, One end of each of the two synchronous pulleys (19) is rotatably connected to one of the two gear slots (13), and the synchronous belt (20) is in contact with the inner wall of the movable slot (18).

6. A replaceable universal support for solder paste printing in PCBA production according to claim 3, characterized in that, Also includes: Two fixing blocks (23) are fixedly connected to one side of the support plate (9), and the two fixing blocks (23) are located on the upper and lower sides of the rotating rod (22) respectively. Each of the two fixing blocks (23) is rotatably connected to a clamping block (24), and the two clamping blocks (24) are in contact with the periphery of the rotating rod (22). A pressing assembly located within a rotating rod (22) and used to press two clamping blocks (24).

7. A replaceable universal support for solder paste printing in PCBA production according to claim 6, characterized in that, The extrusion assembly includes: The second limiting groove (25) is opened in the rotating rod (22) and connected to the outside. A slider (26) is slidably connected in the second limiting groove (25). Two extrusion blocks (27) are fixedly connected to one side of the slider (26). A bolt (28) is threadedly connected in the slider (26). The second through groove (29) is opened on the inner wall of the second limiting groove (25) and connected to the outside. The second through groove (29) is rotatably connected to the first rotating block (30), and one end of the first rotating block (30) extends into the second limiting groove (25) and is fixedly connected to the bolt (28).

8. A replaceable universal support for solder paste printing in PCBA production according to claim 7, characterized in that, The clamping block (24) is inclined, and the bolt (28) is located in the second limiting groove (25) and is rotatably connected to the second limiting groove (25).

9. A replaceable universal support for solder paste printing in PCBA production according to claim 7, characterized in that, The extrusion block (27) is inclined, and one end of the first rotating block (30) is rotatably connected to the second limiting groove (25).

10. A replaceable universal support for solder paste printing in PCBA production according to claim 7, characterized in that, Also includes: The third limiting groove (31) is opened on the inner wall of the movable groove (18). A tensioning wheel (32) is slidably connected in the third limiting groove (31), and the tensioning wheel (32) is in contact with the synchronous belt (20). A screw (33) is rotatably connected in the tensioning wheel (32), and one end of the screw (33) passes through the inner wall of the third limiting groove (31) and extends to the outside to be threadedly connected to the support plate (9). A second rotating block (34) is fixedly connected to the bottom end of the screw (33).

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