Circuit board fixing device for circuit board welding

Abstract

The invention belongs to the technical field of circuit board welding, and particularly relates to a circuit board fixing device for circuit board welding, which comprises a worktable, supporting plates are fixedly connected to two sides of the upper end surface of the worktable, and a connecting rod is rotatably arranged on one side of the upper end of each supporting plate; the connecting rod is provided with a centering clamping mechanism used for fixing the circuit board. By means of the circular hole limiting mechanism and the extrusion type separation mechanism, after the circuit board is welded, the multiple clamping rods are driven to be away from the circuit board, the circuit board falls down due to loss of support, the limiting rod penetrates through an installation hole of the circuit board, the operation is repeated, each welded circuit board is arranged on the limiting rod in a sleeving mode, and therefore the circuit board welding efficiency is improved. Therefore, the process of manually taking down the welded circuit board from the clamping rod and reasonably placing the circuit board is omitted, and labor is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board welding, in particular to a circuit board fixing device for circuit board welding. Background Art

[0002] Circuit boards are an important and indispensable part of electronic equipment. During the production process of circuit boards, electrical components need to be soldered on the circuit boards. In order to prevent the circuit boards from shifting during the soldering process and affecting the soldering quality, the circuit boards need to be fixed.

[0003] The patent with announcement number CN217707713U discloses a chassis conveying device for automobile assembly production, including a base, a hydraulic cylinder fixedly connected to the top of the base, a support frame fixedly connected to the output end of the hydraulic cylinder, a motor fixedly connected to the front of the support frame, a first rotating roller fixedly connected to the output shaft of the motor through a coupling, a conveyor belt movably connected to the outer wall of the first rotating roller, and a second rotating roller movably connected to the inner wall of the conveyor belt. The chassis conveying device for automobile assembly production plays a role of limiting when conveying the chassis, thereby avoiding the problem of displacement of the chassis during the conveying work, can play a good fitting role with both sides of the chassis when limiting, and improves the effect and stability of limiting, further meets the use requirements, improves the use effect, and is convenient for users.

[0004] However, the above technical solution still has the following deficiencies in practical application: Although the circuit board can be fixed, when multiple circuit boards are welded continuously, each time a circuit board is welded, the worker needs to move it from the fixed area before welding the next circuit board. In addition, because the welding points that have just been welded may not be completely solidified, when the worker removes the welded circuit board, he also needs to consciously place the circuit board properly to prevent the welding points on the surface of the circuit board from loosening due to vibration or pressure. This process is relatively cumbersome and increases the labor intensity of the workers. In addition, usually, when all circuit boards are welded, the workers are required to uniformly check the welding quality of each circuit board. If a circuit board is found to have welding defects, it is necessary to continue to re-weld. If the placement of multiple welded circuit boards is relatively random, the circuit boards may be relatively messy, which is not conducive to the workers' inspection of the welding quality of the circuit boards, and then missed inspections may occur, resulting in circuit boards with welding defects flowing into subsequent use.

[0005] To this end, the present invention provides a circuit board fixing device for circuit board welding. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a circuit board fixing device for circuit board welding.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a circuit board fixing device for circuit board welding, comprising a workbench, both sides of the upper end surface of the workbench are fixedly connected to support plates, one side of the upper end of the support plate is rotatably provided with a connecting rod, and the connecting rod is provided with a centering clamping mechanism for fixing the circuit board; The centering clamping mechanism comprises a connecting ring fixedly connected to the upper end of the connecting rod, and a plurality of clamping rods are slidably connected to the connecting ring; The connecting rod is also provided with a round hole limiting mechanism for keeping a plurality of welded circuit boards in order; The circular hole limiting mechanism comprises a mounting plate fixedly connected to the lower end of the connecting rod, sliders are symmetrically arranged on both sides of the mounting plate, and the sliders can pass through the grooves on the mounting plate, and the upper end of the slider is fixedly connected to the limiting rod, and the limiting rod can also pass through the grooves on the mounting plate; The installation plate is also provided with an extrusion type separation mechanism for separating a plurality of circuit boards sleeved on the limit rod; The extrusion type partition mechanism comprises a fixing plate which is symmetrically distributed on both sides of the upper end surface of the mounting plate and fixedly connected to the upper end surface of the mounting plate, and a plurality of supporting blocks are inserted and slidably connected to the fixing plate.

[0008] Preferably, a plurality of connecting rods 2 are rotatably provided on the upper end surface of the connecting ring, a connecting rod 1 is rotatably provided at one end of the connecting rod 2, and one end of the connecting rod 1 is rotatably connected to one end of the clamping rod.

[0009] Preferably, one end of the connecting rod is fixedly connected with a gear, and the gear is rotatably arranged on a connecting ring, and a gear ring is rotatably arranged on the outer ring of the connecting ring, and tooth blocks are intermittently arranged on the inner ring of the gear ring, and the tooth blocks on the inner ring of the gear ring are meshed with the gear.

[0010] Preferably, one side of the upper end surface of the connecting ring is fixedly connected with the second motor, and the output end of the second motor is fixedly connected to one end of the second connecting rod.

[0011] Preferably, one end of the slider is threadedly connected to a bidirectional threaded rod, one side of the lower end surface of the mounting plate is fixedly connected to a second slide rod, the second slide rod is slidably connected to a lifting plate, and both ends of the bidirectional threaded rod are rotatably arranged on the lifting plate.

[0012] Preferably, one end of the slider is slidably connected to a slide rod 1, both ends of the slide rod 1 are fixedly connected to the lifting plate, one end of the lifting plate is fixedly connected to a motor 5, and the output end of the motor 5 is fixedly connected to one end of the bidirectional threaded rod.

[0013] Preferably, a threaded rod 1 is threadedly connected to one side of the lifting plate, the upper end of the threaded rod 1 is rotatably set on the mounting plate, a motor 3 is fixedly connected to one side of the upper end surface of the mounting plate, and the output end of the motor 3 is fixedly connected to the upper end of the threaded rod 1.

[0014] Preferably, a slide rod three is fixedly connected to one side of the lower end surface of the mounting disk, the slide rod three is slidably connected to a pressure rod, one end of the pressure rod is threadedly connected to a threaded rod two, the upper end of the threaded rod two is rotatably set on the mounting disk, and a motor four is fixedly connected to one side of the upper end surface of the mounting disk, and the output end of the motor four is fixedly connected to the upper end of the threaded rod two.

[0015] Preferably, one side of the support block is fixedly connected to spring 1, the other end of which is fixedly connected to the fixed plate, one side of the support block is slidably connected to a positioning block, one side of the positioning block is fixedly connected to spring 2, the other end of which is fixedly connected to the fixed plate.

[0016] Preferably, a motor 1 is fixedly connected to one side of the upper end of the support plate on the right side, and the output end of the motor 1 is fixedly connected to one side of the connecting rod. A through hole is provided at the upper end of the workbench, and the circuit board can fall into the inner cavity of the workbench from the through hole. A box door is provided at the front end of the workbench.

[0017] The beneficial effects of the present invention are as follows: 1. The circuit board fixing device for circuit board welding described in the present invention places one end of the circuit board on the end of the clamping rod on either side, and then drives the connecting rod 2 on one side to rotate by the motor 2, so that the gear drives the gear ring to rotate, so that multiple connecting rods 2 rotate at the same time. When the connecting rod 1 and the connecting rod 2 rotate at the same time, the clamping rod will slide on the connecting ring, and the circuit board can be fixed by sliding multiple clamping rods in the radial direction at the same time, so that the edge of the circuit board is fitted and the circuit board is fixed. The axis of the circuit board coincides with the axis of the connecting ring, thereby achieving the fixing effect of circular circuit boards of different diameters and ensuring the stability of the circuit board during the welding process.

[0018] 2. The circuit board fixing device for circuit board welding described in the present invention utilizes a round hole limiting mechanism and an extrusion type separation mechanism to adjust the spacing between two limiting rods according to the spacing between two symmetrically distributed mounting holes of the circuit board. The limiting rod can be just aligned with the two symmetrically distributed mounting holes on the circuit board. When the circuit board is welded, multiple clamping rods are driven away from the circuit board, and the circuit board will fall downward due to loss of support. The limiting rod then passes through the mounting hole of the circuit board, and the above operation is repeated. Each welded circuit board will be sleeved on the limiting rod, thereby eliminating the need to manually remove the welded circuit board from the clamping rod and place it reasonably, which is more labor-saving. In addition, since the mounting holes of the circuit boards sleeved on the limiting rods overlap, multiple circuit boards can also be placed on the limiting rod. It is relatively neat, which is convenient for workers to check the welding quality of circuit boards in sequence, and it is not easy to miss the inspection. Moreover, every time a circuit board slides downward with the limit rod, the pressure rod will move upward and squeeze the supporting block, and the falling circuit board will be received by the supporting block. Moreover, as the number of circuit boards on the limit rod increases, more supporting blocks are squeezed, which have a supporting effect on the bottom of the circuit board, so that multiple circuit boards can be separated, and the situation that the welding points of the circuit boards are loosened due to pressure is avoided. At the same time, since the circuit boards are not in contact, the circuit boards will not be covered, which makes it easier for workers to check the welding quality of the circuit boards, eliminating the process of manually separating two mutually attached circuit boards. Moreover, when all the circuit boards on the limit rod have completed the quality inspection After work, the mounting plate can be driven to rotate 180 degrees, and the box door can be opened, and a collection container can be placed in the inner cavity of the workbench. Then, the pressure rod can be driven away from the support block, so that the support block can be reset under the action of spring 1, and the circuit board can be dropped into the collection container. Since the circuit boards have been placed still for a period of time, even if the circuit boards are concentrated and piled up at this time, the welding points will not be loosened due to pressure. Moreover, the number of circuit boards dropped at one time can be controlled by controlling the moving distance of the pressure rod to adapt to different collection containers. Moreover, since the circuit boards also move along the limiting rod when they slide down, the circuit boards placed in the collection container are also relatively neat and easy to transport. When a circuit board with welding defects is found, the limiting rod can be driven away from the mounting hole of the circuit board. At this time, the circuit board can be A certain circuit board is taken out separately and the soldering operation is performed, thereby avoiding the situation that the defective circuit board is mixed with the other circuit boards due to the unified falling of the circuit boards, and then it is difficult to take it out separately and perform the soldering operation. In addition, when the support block is squeezed to support the bottom of the circuit board, the positioning block will contact the edge of the circuit board as the support block moves further after the support block contacts the circuit board. When the edge of the circuit board contacts the positioning block, the second spring will be deformed, and the circuit board can be fixed by the two positioning blocks under the action of the second spring. At this time, even if the limit rod is driven out of the mounting hole of the circuit board, the circuit board is not easy to deviate under the action of external force, so that after the defective circuit board is taken out, the limit rod can still pass through the mounting hole of the circuit board.This ensures that the circuit board can fall normally along the limit rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure at the support plate; Figure 3 It is a schematic diagram of the three-dimensional structure at the connecting ring; Figure 4 It is a schematic diagram of the three-dimensional structure of the gear ring; Figure 5 yes Figure 4 A partial enlarged view of the middle part; Figure 6 It is a schematic diagram of the three-dimensional structure at the installation plate; Figure 7 yes Figure 6 A partial enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure at the pressure rod; Fig. 9 yes Figure 8 A partial enlarged view of point C in the middle.

[0021] In the figure: 1. workbench; 2. through hole; 3. support plate; 4. motor 1; 5. connecting rod; 6. mounting plate; 7. gear ring; 8. connecting ring; 9. pressure rod; 10. clamping rod; 11. connecting rod 1; 12. gear; 13. connecting rod 2; 14. slider; 15. slide rod 1; 16. motor 2; 17. motor 3; 18. threaded rod 1; 19. slide rod 2; 20. motor 4; 21. slide rod 3; 22. threaded rod 2; 23. limit rod; 24. support block; 25. spring 1; 26. spring 2; 27. positioning block; 28. fixing plate; 29. ​​lifting plate; 30. motor 5; 31. two-way threaded rod; 32. box door. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please refer to Figure 1-Figure 9The present invention provides a technical solution: a circuit board fixing device for circuit board welding, comprising a workbench 1, both sides of the upper end surface of the workbench 1 are fixedly connected to support plates 3, one side of the upper end of the support plate 3 is rotatably provided with a connecting rod 5, and the connecting rod 5 is provided with a centering clamping mechanism for fixing the circuit board; The centering clamping mechanism comprises a connecting ring 8 fixedly connected to the upper end of the connecting rod 5, and a plurality of clamping rods 10 are slidably connected to the connecting ring 8; The connecting rod 5 is also provided with a circular hole limiting mechanism for keeping a plurality of soldered circuit boards in order; The circular hole limiting mechanism includes a mounting plate 6 fixedly connected to the lower end of the connecting rod 5, and sliders 14 are symmetrically arranged on both sides of the mounting plate 6, and the sliders 14 can pass through the grooves on the mounting plate 6. The upper end of the slider 14 is fixedly connected to a limiting rod 23, and the limiting rod 23 can also pass through the grooves on the mounting plate 6; The mounting plate 6 is also provided with an extrusion type separation mechanism for separating the multiple circuit boards sleeved on the limiting rod 23; The extrusion type partition mechanism includes a fixing plate 28 which is symmetrically distributed on both sides of the upper end surface of the mounting plate 6 and fixedly connected to the upper end surface of the mounting plate 6 , and a plurality of supporting blocks 24 are inserted and slidably connected to the fixing plate 28 .

[0024] In this embodiment, Figure 3-Figure 5 As shown, a plurality of connecting rods 13 are rotatably provided on the upper end surface of the connecting ring 8, a connecting rod 11 is rotatably provided on one end of the connecting rod 13, and one end of the connecting rod 11 is rotatably connected to one end of the clamping rod 10.

[0025] One end of the connecting rod 13 is fixedly connected to a gear 12, which is rotatably arranged on the connecting ring 8. The outer ring of the connecting ring 8 is rotatably arranged with a gear ring 7, and the inner ring of the gear ring 7 is intermittently provided with tooth blocks, and the tooth blocks of the inner ring of the gear ring 7 are meshed with the gear 12.

[0026] A second motor 16 is fixedly connected to one side of the upper end surface of the connecting ring 8 , and an output end of the second motor 16 is fixedly connected to one end of the second connecting rod 13 .

[0027] Specifically, when used for a circular rigid circuit board, one end of the circuit board is placed on the end of the clamping rod 10 on either side, and then the motor 2 16 drives the connecting rod 2 13 on one side to rotate, so that the gear 12 drives the gear ring 7 to rotate, so that multiple connecting rods 2 13 rotate at the same time. When the connecting rod 1 11 and the connecting rod 2 13 rotate at the same time, the clamping rod 10 will slide on the connecting ring 8, and the multiple clamping rods 10 can slide radially at the same time to fit with the edge of the circuit board to fix the circuit board, and the axis of the circuit board coincides with the axis of the connecting ring 8, thereby achieving the fixing effect of circular circuit boards of different diameters and ensuring the stability of the circuit board during the welding process.

[0028] In this embodiment, Figure 1-Figure 3 , Figure 6-Figure 9 As shown, one end of the slider 14 is threadedly connected to a bidirectional threaded rod 31, one side of the lower end surface of the mounting plate 6 is fixedly connected to a slide rod 19, the slide rod 19 is slidably connected to a lifting plate 29, and both ends of the bidirectional threaded rod 31 are rotatably set on the lifting plate 29.

[0029] One end of the slider 14 is slidably connected to a slide rod 15, both ends of the slide rod 15 are fixedly connected to a lifting plate 29, one end of the lifting plate 29 is fixedly connected to a motor 5 30, and the output end of the motor 5 30 is fixedly connected to one end of a bidirectional threaded rod 31.

[0030] A threaded rod 18 is threadedly connected to one side of the lifting plate 29, and the upper end of the threaded rod 18 is rotatably set on the mounting plate 6. A motor 3 17 is fixedly connected to one side of the upper end surface of the mounting plate 6, and the output end of the motor 3 17 is fixedly connected to the upper end of the threaded rod 18.

[0031] A slide rod three 21 is fixedly connected to one side of the lower end surface of the mounting disk 6, and the slide rod three 21 is slidably connected to a pressure rod 9. One end of the pressure rod 9 is threadedly connected to a threaded rod two 22, and the upper end of the threaded rod two 22 is rotatably set on the mounting disk 6. A motor four 20 is fixedly connected to one side of the upper end surface of the mounting disk 6, and the output end of the motor four 20 is fixedly connected to the upper end of the threaded rod two 22.

[0032] A spring 25 is fixedly connected to one side of the support block 24, and the other end of the spring 25 is fixedly connected to the fixed plate 28. A positioning block 27 is slidably connected to one side of the support block 24, and a spring 26 is fixedly connected to one side of the positioning block 27, and the other end of the spring 26 is fixedly connected to the fixed plate 28.

[0033] A motor 4 is fixedly connected to one side of the upper end of the right support plate 3, and the output end of the motor 4 is fixedly connected to one side of the connecting rod 5. A through hole 2 is provided at the upper end of the workbench 1, and the circuit board can fall into the inner cavity of the workbench 1 from the through hole 2. A box door 32 is provided at the front end of the workbench 1.

[0034] Specifically, although the existing circuit board welding fixing device can fix the circuit board when in use, when welding multiple circuit boards continuously, each time a circuit board is welded, the worker needs to move it from the fixed area before welding the next circuit board, and because the welding point that has just been welded may not be completely solidified, when the worker moves the welded circuit board, he also needs to consciously place the circuit board reasonably to prevent the welding points on the surface of the circuit board from loosening due to vibration or pressure. This process is relatively cumbersome and increases the labor intensity of the workers. In addition, usually, when all circuit boards are welded, the workers are required to uniformly check the welding quality of each circuit board. If a circuit board is found to have welding defects, it is necessary to continue to re-weld. If the placement of multiple welded circuit boards is relatively random, the circuit boards may be relatively messy, which is not conducive to the workers' inspection of the welding quality of the circuit boards, and then missed inspections may occur, resulting in the flow of circuit boards with welding defects into subsequent use; Therefore, in order to solve the above problem, this embodiment is used for rigid circuit boards of the same batch with the same specifications, circular shape, and multiple mounting holes evenly arranged around the periphery. The mounting holes are used in conjunction with studs, nuts, etc. in a chassis or other fixed structures, and are a relatively common structure in circuit boards. According to the spacing of the two symmetrically distributed mounting holes of the circuit board, the motor 5 30 is used to drive the bidirectional threaded rod 31 to rotate, so that the sliders 14 on both sides slide on the slider 1 15 at the same time to adjust the spacing of the two limit rods 23, and the two limit rods 23 can just align with the two symmetrically distributed mounting holes on the circuit board; when the circuit board is welded, the multiple clamping rods 10 are driven away from the circuit board, and the circuit board will fall downward due to the loss of support, and the limit rods 23 will pass through the mounting holes of the circuit board, and then the above operation is repeated, and each welded circuit board will be sleeved on the limit rod 23, thereby eliminating the process of manually removing the welded circuit board from the clamping rod 10, which is more labor-saving, and because the mounting holes of the circuit boards sleeved on the limit rods 23 overlap, the multiple circuit boards are also more neat, which is convenient for workers to check the welding quality of the circuit boards in turn, and it is not easy to miss the inspection; Furthermore, when the circuit board is sleeved on the limiting rod 23, although the worker does not need to manually remove the circuit board, and it is also convenient to check the welding quality of the circuit board, the circuit boards on the limiting rod 23 are attached to each other, and the welding points on the circuit boards may not be completely solidified, so the welding points of the circuit boards may become loose due to pressure. In addition, since the circuit boards are attached to each other, the surface of the circuit boards will also be covered. When the worker performs the quality inspection, he needs to separate the two circuit boards that are attached to each other, which is troublesome. Therefore, in order to solve this problem, whenever a circuit board slides downward with the limiting rod 23, the motor 4 20 will drive the threaded rod 22 to rotate, so that the pressure rod 9 moves upward. When the pressing rod 9 is moved, the end of the pressing rod 9 will contact the bottom support block 24, and because one side of the support block 24 is an inclined surface, the support block 24 will slide, the spring 25 will be compressed, and the support block 24 will be close to the limiting rod 23. At this time, the falling circuit board will be received by the support block 24, and as the number of circuit boards on the limiting rod 23 increases, more and more support blocks 24 will be squeezed, which will play a supporting effect on the bottom of the circuit board, so that multiple circuit boards can be separated, avoiding the situation that the welding points of the circuit boards are loosened due to pressure. At the same time, because the circuit boards are not in contact, the circuit boards will not be covered, which makes it easier for workers to check the welding quality of the circuit boards, eliminating the process of manually separating two mutually attached circuit boards; After all the circuit boards on the limit rod 23 have completed the quality inspection, the motor 4 can be used to drive the mounting plate 6 to rotate 180 degrees, and the box door 32 can be opened to place a collection container in the inner cavity of the workbench 1, and then the pressure rod 9 is driven away from the support block 24, so that the support block 24 is reset under the action of the spring 25, and the circuit boards can be dropped into the collection container. Since the circuit boards have been placed for a period of time, even if the circuit boards are concentrated and piled up at this time, the welding points will not be loosened due to pressure. In addition, the number of circuit boards dropped at one time can be controlled by controlling the moving distance of the pressure rod 9 to adapt to different collection containers. In addition, since the circuit boards also move along the limit rod 23 when they slide down, the circuit boards placed in the collection container are also relatively neat, which is convenient for transportation. Since the circuit boards are collected by dropping them one by one, during the welding quality inspection, if a circuit board is found to have welding defects and needs to be re-welded, if multiple circuit boards are dropped at the same time, the defective circuit will be mixed with the other circuit boards, making it difficult to find it separately, thus affecting the re-welding work. Therefore, in order to solve this problem, when a circuit board with welding defects is found, the motor 3 17 can be used to drive the threaded rod 22 to rotate, so that the lifting plate 29 moves downward until the limit rod 23 is separated from the mounting hole of the circuit board. At this time, one of the circuit boards can be taken out separately and the re-welding operation can be performed, thereby avoiding the situation where the circuit boards are dropped uniformly, causing the defective circuit board to be mixed with the other circuit boards, making it difficult to take it out separately and re-weld it; Furthermore, when a worker takes out a defective circuit board, the remaining circuit boards placed on the support block 24 may be offset due to accidental touch or external force, resulting in the inability of the mounting holes of the circuit boards to align with the limiting rods 23. Since the circuit boards need to be neatly placed in the collection container using the limiting rods 23, when the mounting holes of the circuit boards are no longer aligned with the limiting rods 23, neat unloading operations cannot be performed. Therefore, in order to avoid this problem, when the support block 24 is squeezed to support the bottom of the circuit board, the positioning block 27 is at the junction of the support block 24 and the circuit board. After the touch, as the support block 24 moves further, it contacts the edge of the circuit board. When the edge of the circuit board contacts the positioning block 27, the spring 26 will be deformed, and the circuit board can be fixed by the two positioning blocks 27 under the action of the spring 26. At this time, even if the limit rod 23 is driven out of the mounting hole of the circuit board, the circuit board is not easy to deviate under the action of external force. Therefore, after the defective circuit board is taken out, the limit rod 23 can still pass through the mounting hole of the circuit board, ensuring that the circuit board can fall normally along the limit rod 23.

[0035] Working principle: place one end of the circuit board on the end of the clamping rod 10 on either side, and then drive the connecting rod 2 13 on one side to rotate through the motor 2 16, so that the gear 12 drives the gear ring 7 to rotate, so that multiple connecting rods 2 13 rotate at the same time. When the connecting rod 1 11 and the connecting rod 2 13 rotate at the same time, the clamping rod 10 will slide on the connecting ring 8, and the circuit board can be fixed by sliding multiple clamping rods 10 radially at the same time. The circuit board and the connecting ring 8 coincide with each other, thereby achieving the fixing effect of circular circuit boards of different diameters and ensuring the stability of the circuit board during the welding process. According to the spacing between the two symmetrically distributed mounting holes of the circuit board, the motor 5 30 is used to drive the bidirectional threaded rod 31 to rotate. The sliders 14 on both sides slide on the slider 15 at the same time to adjust the spacing between the two limit rods 23, and the two limit rods 23 can just align with the two symmetrically distributed mounting holes on the circuit board; when the circuit board is welded, the multiple clamping rods 10 are driven away from the circuit board, and the circuit board will fall downward due to the loss of support, and the limit rods 23 will pass through the mounting holes of the circuit board, and then the above operation is repeated, and each welded circuit board will be sleeved on the limit rod 23, thereby eliminating the process of manually removing the welded circuit board from the clamping rod 10, which is more labor-saving, and because the mounting holes of the circuit boards sleeved on the limit rods 23 overlap, multiple circuit boards are also more neat, which is convenient for workers to check the welding quality of the circuit boards Furthermore, when the circuit board is sleeved on the limiting rod 23, although the worker does not need to manually remove the circuit board, it is also convenient to check the welding quality of the circuit board. However, since the circuit boards on the limiting rod 23 are attached to each other, and the welding points on the circuit boards may not be completely solidified, the welding points of the circuit boards may become loose due to pressure. In addition, since the circuit boards are attached to each other, the surfaces of the circuit boards will also be covered. When the workers conduct quality inspections, they also need to separate the two circuit boards that are attached to each other, which is troublesome. Therefore, in order to solve this problem, whenever a circuit board slides downward with the limiting rod 23, the motor 4 20 will drive the threaded rod 22 to rotate. The pressing rod 9 is moved upward, and the end of the pressing rod 9 will contact the bottommost support block 24. Since one side of the support block 24 is an inclined surface, the support block 24 will slide, and the spring 25 will be compressed, and the support block 24 will be close to the limiting rod 23. At this time, the falling circuit board will be received by the support block 24. Moreover, as the number of circuit boards on the limiting rod 23 increases, more and more support blocks 24 are squeezed, which have a supporting effect on the bottom of the circuit board, so that multiple circuit boards can be separated, and the situation that the welding points of the circuit boards are loosened due to pressure is avoided. At the same time, since the circuit boards are not in contact, the circuit boards will not be covered, which makes it easier for workers to check the welding quality of the circuit boards, eliminating the process of manually separating two mutually bonded circuit boards.After all the circuit boards on the limit rod 23 have completed the quality inspection, the motor 4 can be used to drive the mounting plate 6 to rotate 180 degrees, and the box door 32 can be opened to place a collection container in the inner cavity of the workbench 1, and then the pressure rod 9 is driven away from the support block 24, so that the support block 24 is reset under the action of the spring 25, and the circuit boards can be dropped into the collection container. Since the circuit boards have been placed still for a period of time, even if the circuit boards are concentrated and piled up at this time, the welding points will not be loosened due to pressure. In addition, the number of circuit boards dropped at one time can be controlled by controlling the moving distance of the pressure rod 9 to adapt to different collection containers. In addition, when the circuit boards slide down, they also slide along the limit rod 9. The positioning rod 23 moves, so the circuit boards placed in the collection container are also relatively neat and easy to transport; because the circuit boards are collected by making them fall one by one, and during the welding quality inspection process, if a circuit board is found to have a welding defect and needs to be re-welded, if multiple circuit boards are dropped at the same time, the defective circuits will be mixed with the remaining circuit boards, making it difficult to find them separately, thereby affecting the re-welding work. Therefore, in order to solve this problem, when a circuit board with a welding defect is found, the motor three 17 can be used to drive the threaded rod two 22 to rotate, so that the lifting plate 29 moves downward until the limiting rod 23 is separated from the circuit board. In this case, one of the circuit boards can be taken out separately and repaired by soldering, thereby avoiding the situation where the defective circuit board is mixed with the other circuit boards due to the uniform falling of the circuit boards, and it is difficult to take them out separately and repair them by soldering; and when the worker takes out the defective circuit board, the other circuit boards placed on the support block 24 may be offset due to accidental touch or external force, so that the mounting holes of the circuit board cannot be aligned with the limit rod 23. Since the circuit boards need to be neatly placed in the collection container by using the limit rod 23, when the mounting holes of the circuit boards are no longer aligned with the limit rod 23, the neat unloading operation cannot be performed. Therefore, in order to avoid this Problem: when the support block 24 is squeezed and supports the bottom of the circuit board, the positioning block 27 will contact the edge of the circuit board as the support block 24 moves further after the support block 24 contacts the circuit board. When the edge of the circuit board contacts the positioning block 27, the second spring 26 will be deformed, and the circuit board can be fixed by the two positioning blocks 27 under the action of the second spring 26. At this time, even if the limiting rod 23 is driven out of the mounting hole of the circuit board, the circuit board is not easy to deviate under the action of external force, so that after the defective circuit board is taken out, the limiting rod 23 can still pass through the mounting hole of the circuit board, ensuring that the circuit board can fall normally along the limiting rod 23. ;

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A circuit board fixing device for circuit board welding, comprising a workbench (1), characterized in that: Support plates (3) are fixedly connected to both sides of the upper end surface of the workbench (1); a connecting rod (5) is rotatably provided on one side of the upper end of the support plate (3); and a centering clamping mechanism for fixing the circuit board is provided on the connecting rod (5); The centering clamping mechanism comprises a connecting ring (8) fixedly connected to the upper end of the connecting rod (5), and a plurality of clamping rods (10) are slidably connected to the connecting ring (8); The connecting rod (5) is also provided with a circular hole limiting mechanism for keeping a plurality of welded circuit boards in order; The circular hole limiting mechanism comprises a mounting plate (6) fixedly connected to the lower end of the connecting rod (5), sliders (14) are symmetrically arranged on both sides of the mounting plate (6), and the sliders (14) can pass through the grooves on the mounting plate (6), and the upper end of the slider (14) is fixedly connected to a limiting rod (23), and the limiting rod (23) can also pass through the groove on the mounting plate (6); The installation plate (6) is also provided with an extrusion type separation mechanism for separating a plurality of circuit boards sleeved on the limiting rod (23); The extrusion type partition mechanism comprises a fixing plate (28) symmetrically distributed on both sides of the upper end surface of the mounting plate (6) and fixedly connected to the upper end surface of the mounting plate (6), and a plurality of supporting blocks (24) are plugged and slidably connected to the fixing plate (28).

2. A circuit board fixing device for circuit board welding according to claim 1, characterized in that: A plurality of connecting rods (13) are rotatably provided on the upper end surface of the connecting ring (8), a connecting rod (11) is rotatably provided on one end of the connecting rod (13), and one end of the connecting rod (11) is rotatably connected to one end of the clamping rod (10).

3. A circuit board fixing device for circuit board welding according to claim 2, characterized in that: One end of the second connecting rod (13) is fixedly connected to a gear (12), and the gear (12) is rotatably arranged on a connecting ring (8). A gear ring (7) is rotatably arranged on the outer ring of the connecting ring (8), and tooth blocks are intermittently arranged on the inner ring of the gear ring (7), and the tooth blocks on the inner ring of the gear ring (7) are meshed with the gear (12).

4. A circuit board fixing device for circuit board welding according to claim 3, characterized in that: One side of the upper end surface of the connecting ring (8) is fixedly connected to a second motor (16), and the output end of the second motor (16) is fixedly connected to one end of the second connecting rod (13).

5. A circuit board fixing device for circuit board welding according to claim 1, characterized in that: One end of the slider (14) is threadedly connected to a bidirectional threaded rod (31), one side of the lower end surface of the mounting plate (6) is fixedly connected to a second slide rod (19), the second slide rod (19) is slidably connected to a lifting plate (29), and both ends of the bidirectional threaded rod (31) are rotatably arranged on the lifting plate (29).

6. A circuit board fixing device for circuit board welding according to claim 5, characterized in that: One end of the slider (14) is slidably connected to a slide rod (15), both ends of the slide rod (15) are fixedly connected to a lifting plate (29), one end of the lifting plate (29) is fixedly connected to a motor (30), and an output end of the motor (30) is fixedly connected to one end of a bidirectional threaded rod (31).

7. A circuit board fixing device for circuit board welding according to claim 5, characterized in that: A threaded rod 1 (18) is threadedly connected to one side of the lifting plate (29); the upper end of the threaded rod 1 (18) is rotatably arranged on the mounting plate (6); a motor 3 (17) is fixedly connected to one side of the upper end surface of the mounting plate (6); and the output end of the motor 3 (17) is fixedly connected to the upper end of the threaded rod 1 (18).

8. A circuit board fixing device for circuit board welding according to claim 1, characterized in that: A slide bar three (21) is fixedly connected to one side of the lower end surface of the mounting plate (6), and a pressure bar (9) is slidably connected to the slide bar three (21). One end of the pressure bar (9) is threadedly connected to a threaded rod two (22), and the upper end of the threaded rod two (22) is rotatably arranged on the mounting plate (6). A motor four (20) is fixedly connected to one side of the upper end surface of the mounting plate (6), and the output end of the motor four (20) is fixedly connected to the upper end of the threaded rod two (22).

9. A circuit board fixing device for circuit board welding according to claim 1, characterized in that: One side of the support block (24) is fixedly connected to a spring 1 (25), and the other end of the spring 1 (25) is fixedly connected to a fixed plate (28). One side of the support block (24) is slidably connected to a positioning block (27), and one side of the positioning block (27) is fixedly connected to a spring 2 (26), and the other end of the spring 2 (26) is fixedly connected to the fixed plate (28).

10. A circuit board fixing device for circuit board welding according to claim 1, characterized in that: A motor 1 (4) is fixedly connected to one side of the upper end of the support plate (3) on the right side, and the output end of the motor 1 (4) is fixedly connected to one side of the connecting rod (5). A through hole (2) is provided at the upper end of the workbench (1), and a circuit board can fall into the inner cavity of the workbench (1) through the through hole (2). A box door (32) is provided at the front end of the workbench (1).

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