A multi-surface welding tool for a circuit board

Abstract

The application discloses a kind of multi-surface welding tool of circuit board, it is related to circuit board welding technical field, including workbench, workbench upper surface is fixedly connected with support plate symmetrically, rotatingly connected with placing rack between two support plates, placing rack top is fixedly connected with elastic sheet, workbench upper surface is rotatably connected with fan, switching mechanism for overturning circuit board is arranged on the side surface of support plate, deflection mechanism for driving fan and blowing airflow to the surface of circuit board is arranged on the other side of support plate, by being provided with switching mechanism, operator's both hands can continue to hold soldering iron and flux, so welding of circuit board can be continuously carried out, reduce the time and step of operation, reduce waiting time, improve the continuity and fluency of work, both hands simultaneously welding and applying flux, welding and applying flux do not need to be carried out separately, welding task can be more efficiently completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board welding, in particular to a multi-surface circuit board welding tool. BACKGROUND

[0002] Circuit board welding is a process of connecting electronic components and pads (or solder joints) on the circuit board. Through welding, electrical connection and mechanical fixation between electronic components and the circuit board can be achieved. Circuit board welding requires mastering welding process parameters, selecting appropriate welding equipment and tools, and performing welding quality inspection, etc. The quality of welding has an important influence on the performance and reliability of the circuit board, so the welding process needs to strictly control the welding temperature, welding time, welding pressure and welding agent, etc.

[0003] In the process of manufacturing circuit boards, the welding link is a very critical step. Especially in the case of manually welding circuit boards, the operator needs to turn over the circuit board after completing the welding of one side in order to weld the other side. In this process, the operator needs to hold the soldering iron and the flux at the same time, which makes them have to place these two tools first and then manually turn over the circuit board when turning over the circuit board. Such an operating mode not only reduces the welding speed of the circuit board, but also is not conducive to realizing the continuous welding of the circuit board.

[0004] In addition, heat dissipation treatment needs to be performed on the surface of the circuit board during the welding of the circuit board. Usually, a fan is used for heat dissipation. However, if the fan blows towards the solder joint during the manual welding process, the lead wire will swing irregularly under the blowing of the airflow, so that the lead wire cannot be stably connected with the solder joint. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present application provides a multi-surface circuit board welding tool, which can effectively solve the problems of discontinuous welding of the circuit board and the lead wire being unable to be stably connected with the circuit board in the prior art.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions,

[0009] The present application discloses a multi-surface circuit board welding tool, which comprises a workbench, the upper surface of the workbench is symmetrically fixedly connected with support plates, a placing rack is rotatably connected between the two support plates, an elastic sheet is fixedly connected to the top of the placing rack, a fan is rotatably connected to the upper surface of the workbench, a switching mechanism for turning over the circuit board is arranged on the side of the support plate, and a deflection mechanism for driving the fan to blow the airflow towards the surface of the circuit board is arranged on the other side of the support plate.

[0010] The switching mechanism comprises a rotating shaft fixedly connected with the side of the placing rack, the rotating shaft penetrates through the support plate, the rotating shaft is rotationally connected with the support plate, one end of the rotating shaft away from the placing rack is fixedly connected with a driving gear, the driving gear is meshingly connected with a rack, the bottom of the rack is fixedly connected with a push rod, the push rod vertically penetrates through the workbench, and the push rod extends to the bottom of the workbench, and one end of the push rod away from the rack is fixedly connected with an arc-shaped plate.

[0011] Further, the switching mechanism further comprises a limiting block fixedly connected with the push rod, the limiting block is located at the bottom of the workbench, and a first spring is sleeved outside the push rod between the limiting block and the workbench.

[0012] Further, the deflection mechanism comprises a connecting shaft fixedly connected with the fan, one end of the connecting shaft is fixedly connected with a driven wheel, the side of the support plate is rotationally connected with a transmission shaft, the side of the transmission shaft is fixedly connected with a driving wheel, and the driving wheel and the driven wheel are transmissionally connected through a transmission belt.

[0013] Further, the outer side of the transmission shaft is further fixedly connected with a second gear, the second gear is meshingly connected with a first gear, and the first gear is fixedly connected with the placing rack.

[0014] Further, the rack is in an I-shaped structure in the transverse section, the upper surface of the workbench is fixedly connected with a limiting rod, the limiting rod is vertically provided with a sliding groove, and the rack is slidingly connected with the limiting rod.

[0015] Further, the lower surface of the workbench is fixedly connected with a fixed block, the fixed block is slidingly connected with an L-shaped pull rod, one end of the pull rod is fixedly connected with a second clamping block, the other end of the pull rod is fixedly connected with a baffle, the outer side of the pull rod is sleeved with a second spring, and the second spring is located on the outer side of the pull rod between the fixed block and the second clamping block.

[0016] Further, the outer side of the push rod is fixedly connected with a first clamping block, the top of the first clamping block is provided with an inclined surface, the bottom of the second clamping block is provided with an inclined surface, and the second clamping block is located above the first clamping block.

[0017] Further, the vertical distance between the first clamping block and the second clamping block is equal to the circumference of the driving gear, and the placing rack is in a mouth-shaped structure.

[0018] (Three) beneficial effects

[0019] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects,

[0020] 1. By setting the switching mechanism, after completing the welding of one side of the circuit board, the operator directly uses the knee to push the arc-shaped plate upwards to drive the placing rack to rotate 180 degrees, thereby turning over the circuit board, which can weld the other side of the circuit board. In this process, the operator does not need to touch the placing rack with both hands, and the knee replaces the hands to turn over the circuit board. The operator's hands can continue to hold the soldering iron and flux, which can continuously weld the circuit board, reduce the operation time and steps, reduce the waiting time, improve the continuity and smoothness of the work, and weld and apply flux with both hands at the same time, without separate welding and applying flux, which can more efficiently complete the welding task.

[0021] 2. By setting the deflection mechanism, when the circuit board needs to be turned over after welding one side, the fan is driven by the connecting shaft to rotate towards the surface of the circuit board, and the airflow is blown towards the surface of the circuit board by the deflected fan, thereby cooling the surface of the circuit board. When the circuit board rotates 180 degrees, the fan again deviates from the surface of the circuit board. In this way, during welding, the surface of the circuit board will not have airflow blowing the lead, which can ensure the stability of the welded lead and improve the precision and accuracy of welding. Stable welding leads can make the operator more focused and efficient during welding, without the need to frequently adjust the welding position, so that the operator can complete the welding task more quickly. At the same time, by avoiding airflow blowing, the situation of incomplete welding points or uneven coverage of solder caused by lead swing during welding is avoided, thereby improving the quality and stability of the welding points.

[0022] 3. By setting the first and second clamping blocks, after turning over the circuit board, the second clamping block is used to clamp the first clamping block, thereby preventing the push rod from moving downward. In this way, the placing rack can be kept in a stable state, and the stable placing rack can help the welder to more accurately control the welding position and force, thereby improving the accuracy and precision of welding. The improvement of welding precision helps to ensure the stability and reliability of the welding points. At the same time, the shaking of the circuit board during welding may cause inaccurate welding points or short circuit problems, and the stable circuit board can help the welder to better control the welding process and reduce the possibility of welding errors. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any inventive work.

[0024] Figure 1It is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 A three-dimensional structural diagram of the present invention from another angle;

[0026] Figure 3 It is a front view of the present invention;

[0027] Figure 4 It is a top view of the present invention;

[0028] Figure 5 It is a three-dimensional structural diagram of the switching mechanism in the present invention;

[0029] Figure 6 is a three-dimensional structural diagram of the deflection mechanism of the present invention;

[0030] Figure 7 For the present invention Figure 1 A magnified view of the structure at point A;

[0031] Figure 8 For the present invention Figure 3 A magnified view of the structure at point B.

[0032] The reference numerals in the figure represent, respectively, 100, workbench; 101, support plate; 102, placement rack; 103, elastic sheet; 104, fan;

[0033] 200, switching mechanism; 201, rotating shaft; 202, driving gear; 203, rack; 204, push rod; 205, first spring; 206, limit block; 207, arc plate; 208, limit rod; 209, slide groove;

[0034] 300, first clamping block; 400, second clamping block; 500, pull rod; 600, second spring; 700, fixing block; 800, baffle;

[0035] 900, deflection mechanism; 901, connecting shaft; 902, driving pulley; 903, driven pulley; 904, transmission belt; 905, transmission shaft; 906, first gear; 907, second gear. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0037] The present invention will be further described below with reference to the embodiments.

[0038] A multi-sided welding tool for a circuit board in this embodiment, such as Figures 1-8 As shown, it includes a workbench 100, with support plates 101 symmetrically fixedly connected to the upper surface of the workbench 100, a placement rack 102 rotatably connected between the two support plates 101, an elastic sheet 103 fixedly connected to the top of the placement rack 102, a fan 104 rotatably connected to the upper surface of the workbench 100, a switching mechanism 200 for flipping the circuit board is provided on the side of the support plate 101, and a deflection mechanism 900 for driving the fan 104 to blow air toward the surface of the circuit board is provided on the other side of the support plate 101;

[0039] The switching mechanism 200 includes a rotating shaft 201 fixedly connected to the side of the placement rack 102, the rotating shaft 201 passes through the support plate 101, and the rotating shaft 201 is rotatably connected to the support plate 101. The rotating shaft 201 is fixedly connected to the driving gear 202 at the end away from the placement rack 102, and the driving gear 202 is meshed with the rack 203. The bottom of the rack 203 is fixedly connected to a push rod 204, the push rod 204 vertically passes through the workbench 100, and the push rod 204 extends to the bottom of the workbench 100, and the push rod 204 is fixedly connected to the arc plate 207 at the end away from the rack 203. Place the circuit board to be soldered on top of the placement rack 102, push the circuit board horizontally between the placement rack 102 and the elastic sheet 103, and use the elasticity of the elastic sheet 103 to press the circuit board down on the top of the placement rack 102. Then, the placement rack 102 needs to be kept in a horizontal state. When the placement rack 102 is in a horizontal state, the bottom of the limit block 206 is against the top of the second block 400, and the fan 104 is tilted upward so that the fan 104 can blow airflow toward the operator's head.

[0040] As a preferred implementation in this embodiment, Figure 5 As shown, the switching mechanism 200 also includes a limit block 206 fixedly connected to the push rod 204, the limit block 206 is located at the bottom of the workbench 100, and a first spring 205 is sleeved on the outside of the push rod 204, and the first spring 205 is located outside the push rod 204 between the limit block 206 and the workbench 100.

[0041] As a preferred implementation in this embodiment, Figure 7 As shown, the cross section of the rack 203 is an I-shaped structure, and a limit rod 208 is fixedly connected to the upper surface of the workbench 100. The limit rod 208 is vertically provided with a sliding groove 209, and the rack 203 is slidably connected to the limit rod 208.

[0042] In this embodiment, Figure 3 and Figure 8As shown, a fixed block 700 is fixedly connected to the lower surface of the workbench 100, and the fixed block 700 is slidably connected to an L-shaped pull rod 500. One end of the pull rod 500 is fixedly connected to a second clamping block 400, and the other end of the pull rod 500 is fixedly connected to a baffle 800. A second spring 600 is sleeved on the outside of the pull rod 500, and the second spring 600 is located on the outside of the pull rod 500 between the fixed block 700 and the second clamping block 400. During the process of the placement rack 102 driving the circuit board to turn 180 degrees, the placement rack 102 simultaneously drives the first gear 906 to rotate. Since the first gear 906 and the second gear 907 are meshed and connected, the first gear 906 drives the second gear 907 to rotate, and the rotation directions of the first gear 906 and the second gear 907 are opposite to each other. The second gear 907 drives the driving wheel 902 to rotate synchronously through the transmission shaft 905. Since the driving wheel 902 and the driven wheel 903 are connected by the transmission belt 904, the driven wheel 903 is driven to rotate through the transmission belt 904 during the rotation of the driving wheel 902. The rotating driven wheel 903 drives the fan 104 to the surface of the workbench 100 through the connecting shaft 901. The surface deflects. When the placement rack 102 flips over 180 degrees, the fan 104 tilts downward, so that the fan 104 blows air toward the bottom of the placement rack 102. The fan 104 blows the airflow toward the surface of the circuit board, thereby dissipating the heat from the surface of the circuit board. In this way, during welding, there will be no airflow blowing the leads on the surface of the circuit board. Avoiding airflow blowing can ensure the stability of the welding leads and improve the precision and accuracy of welding. The stable and non-swinging welding leads can make the operator more focused and efficient when welding, and there is no need to frequently adjust the welding position. The operator can complete the welding task faster. At the same time, by avoiding airflow blowing, the swing of the welding leads can be avoided, which can cause incomplete welding points or uneven solder coverage, thereby improving the quality and stability of the welding points.

[0043] In this embodiment, Figure 8 As shown, a first clamping block 300 is fixedly connected to the outer side of the push rod 204 , a slope is provided on the top of the first clamping block 300 , a slope is provided on the bottom of the second clamping block 400 , and the second clamping block 400 is located above the first clamping block 300 .

[0044] In this embodiment, Figure 3 As shown, the vertical distance between the first clamping block 300 and the second clamping block 400 is equal to the circumference of the driving gear 202, and the placement rack 102 is in a square shape.

[0045] Compared with the existing technology, the operator does not need to touch the placement rack 102 with both hands, and uses his knees instead of his hands to flip the circuit board. The operator's hands can continue to hold the soldering iron and flux, so that the circuit board can be continuously soldered, which reduces the operation time and steps, reduces the waiting time, and improves the continuity and smoothness of the work. Both hands can be used for soldering and applying flux at the same time, and there is no need to solder and apply flux separately, so the welding task can be completed more efficiently.

[0046] In other aspects, this embodiment also provides a mechanism capable of rotating the fan 104, such as Figure 6 As shown, the deflection mechanism 900 includes a connecting shaft 901 fixedly connected to the fan 104, one end of the connecting shaft 901 is fixedly connected to a driven wheel 903, the side of the support plate 101 is rotatably connected to a transmission shaft 905, the side of the transmission shaft 905 is fixedly connected to a driving wheel 902, and the driving wheel 902 and the driven wheel 903 are connected through a transmission belt 904.

[0047] As a preferred implementation in this embodiment, Figure 6 As shown, a second gear 907 is fixedly connected to the outside of the transmission shaft 905. The second gear 907 is meshed with the first gear 906, and the first gear 906 is fixedly connected to the placement rack 102. The placement rack 102 simultaneously drives the first gear 906 to rotate. Since the first gear 906 and the second gear 907 are meshed and connected, the first gear 906 drives the second gear 907 to rotate, and the rotation directions of the first gear 906 and the second gear 907 are opposite to each other. The second gear 907 drives the driving wheel 902 to rotate synchronously through the transmission shaft 905. Since the driving wheel 902 and the driven wheel 903 are connected by a transmission belt 904, the driving wheel 902 rotates and drives the driven wheel 903 to rotate through the transmission belt 904. The rotating driven wheel 903 drives the fan 104 to deflect toward the upper surface of the workbench 100 through the connecting shaft 901. When the placement rack 102 is flipped 180 degrees, the fan 104 tilts downward, so that the fan 104 blows air toward the bottom of the placement rack 102.

[0048] Compared with the prior art, the fan 104 blows air toward the surface of the circuit board, thereby dissipating heat from the surface of the circuit board. In this way, during welding, there will be no airflow blowing the leads on the surface of the circuit board. Avoiding airflow blowing can ensure the stability of the welding leads and improve the precision and accuracy of welding. The stable and non-swaying welding leads can make the operator more focused and efficient when welding, and there is no need to frequently adjust the welding position. The operator can complete the welding task faster. At the same time, by avoiding airflow blowing, the swing of the welding leads can be avoided, resulting in incomplete welding points or uneven solder coverage, thereby improving the quality and stability of the welding points.

[0049] Working principle: when welding the circuit board, first place the circuit board to be welded on the top of the placing rack 102, push the circuit board horizontally between the placing rack 102 and the elastic sheet 103, use the elasticity of the elastic sheet 103 to press the circuit board down on the top of the placing rack 102, then need to keep the placing rack 102 in a horizontal state, when the placing rack 102 is in a horizontal state, the bottom of the limiting block 206 abuts against the top of the second clamping block 400, the fan 104 is inclined upward, so that the fan 104 can blow air to the head of the operator;

[0050] Then weld one side of the circuit board, the upwardly inclined fan 104 blows air to the head of the operator during welding operation, avoiding the sweat of the operator's head from falling on the surface of the circuit board due to long-time welding operation, affecting the welding quality, when one side of the circuit board is welded, the operator pushes the arc-shaped plate 207 upward with the knees, the arc-shaped plate 207 pushes the push rod 204 to move upward synchronously, the upwardly moving push rod 204 pushes the rack 203 to move upward synchronously, at this time the rack 203 moves along the sliding groove 209 of the limiting rod 208, when the rack 203 moves upward, the rack 203 drives the driving gear 202 to rotate, the rotating driving gear 202 drives the placing rack 102 to rotate on the support plate 101 through the rotating shaft 201, continuously rotates the placing rack 102 by pushing it upward with the knees, when the placing rack 102 rotates one hundred and eighty degrees, at this time the other side of the circuit board is turned upward, the first clamping block 300 outside the push rod 204 moves to the top of the second clamping block 400, so that the push rod 204 can be fixed, thereby avoiding the downward movement of the push rod 204, when the position of the push rod 204 is fixed, the placing rack 102 can be kept stable after being turned over, at the same time, the push rod 204 drives the limiting block 206 to compress the first spring 205 to store energy, the stable placing rack 102 can keep the circuit board stable during welding, the stable circuit board can help the welder to control the welding position and force more accurately, improve the accuracy and precision of welding, the improvement of welding precision helps to ensure the stability and reliability of the welding points, at the same time, the shaking of the circuit board during welding may cause inaccurate welding point position or short circuit, etc., the stable circuit board can help the welder to control the welding process better, reduce the possibility of welding failure;

[0051] At the same time, the operator does not need to touch the placing rack 102 with both hands, uses the right knee of the operator instead of the hands to turn over the circuit board, the hands of the operator can continue to hold the soldering iron and flux, so that the welding of the circuit board can be continuously carried out, reducing the operation time and steps, reducing the waiting time, improving the continuity and smoothness of the work, welding and applying flux with both hands at the same time, without separating welding and applying flux, can complete the welding task more efficiently;

[0052] In the process of the placement rack 102 driving the circuit board to overturn one hundred and eighty degrees, the placement rack 102 simultaneously drives the first gear 906 to rotate, since the first gear 906 and the second gear 907 are meshed and connected, the first gear 906 drives the second gear 907 to rotate, and the rotating directions of the first gear 906 and the second gear 907 are opposite to each other, the second gear 907 drives the driving wheel 902 to rotate synchronously through the transmission shaft 905, since the driving wheel 902 and the driven wheel 903 are transmissionally connected through the transmission belt 904, the driving wheel 902 drives the driven wheel 903 to rotate through the transmission belt 904 in the process of rotating, the driven wheel 903 drives the fan 104 to deflect towards the upper surface of the workbench 100 through the connecting shaft 901, when the placement rack 102 overturns one hundred and eighty degrees, the fan 104 is inclined downward, so that the fan 104 blows air towards the bottom of the placement rack 102, the fan 104 blows air towards the surface of the circuit board, so as to cool the surface of the circuit board, in this way, during welding, the surface of the circuit board will not be blown by air flow, which can ensure the stability of the welding lead, improve the precision and accuracy of welding, the stable welding lead can make the operator more focused and efficient during welding, without frequent adjustment of the welding position, the operator can complete the welding task more quickly, at the same time, by avoiding air flow blowing, the incomplete welding point or unevenly covered solder caused by the swinging of the welding lead can be avoided, so as to improve the quality and stability of the welding point;

[0053] When the welding of the one side of the circuit board is completed, the circuit board needs to be turned back to the initial placement state, that is, the circuit board is reversely rotated one hundred and eighty degrees, at this time, the operator pushes the baffle 800 horizontally to the left with the left leg, the baffle 800 drives the L-shaped pull rod 500 to move horizontally to the left, the pull rod 500 moving to the left drives the second clamping block 400 to disengage from the bottom of the first clamping block 300, at this time, the push rod 204 moves downward under the elastic force of the first spring 205, the push rod 204 moving downward drives the rack 203 to move downward synchronously, the rack 203 moving downward drives the driving gear 202 to reversely rotate, the driving gear 202 reversely rotating drives the placement rack 102 to reversely overturn, so that the placement rack 102 can reversely rotate the circuit board one hundred and eighty degrees, in this process, the placement rack 102 simultaneously drives the first gear 906 to reversely rotate, the first gear 906 drives the second gear 907 to rotate, and the rotating directions of the first gear 906 and the second gear 907 are opposite to each other, the second gear 907 drives the driving wheel 902 to reversely rotate synchronously through the transmission shaft 905, the driving wheel 902 reversely rotating drives the driven wheel 903 to reversely rotate through the transmission belt 904, the driven wheel 903 reversely rotating drives the fan 104 to deflect, at this time, the fan 104 gradually rotates from the state of being inclined downward to the state of being inclined upward;

[0054] When the placing frame 102 drives the circuit board to rotate reversely by 180 degrees, the operator moves the left leg to the right, at this time the baffle 800 lacks the pushing force to the left, and the L-shaped pull rod 500 is pushed to move horizontally along the fixed block 700 to the right under the elastic force of the second spring 600, so that the first clamping block 300 abuts against the bottom of the limiting block 206.

[0055] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-sided welding tool for a circuit board, comprising a workbench (100), wherein the upper surface of the workbench (100) is symmetrically fixedly connected to a support plate (101), a placement rack (102) is rotatably connected between two of the support plates (101), an elastic sheet (103) is fixedly connected to the top of the placement rack (102), and a fan (104) is rotatably connected to the upper surface of the workbench (100), characterized in that: A switching mechanism (200) for flipping the circuit board is provided on the side of the support plate (101), and a deflection mechanism (900) for driving a fan (104) to blow airflow toward the surface of the circuit board is provided on the other side of the support plate (101); The switching mechanism (200) includes a rotating shaft (201) fixedly connected to the side of the placement rack (102), the rotating shaft (201) passes through the support plate (101), the rotating shaft (201) is rotatably connected to the support plate (101), the rotating shaft (201) is fixedly connected to the driving gear (202) at one end away from the placement rack (102), the driving gear (202) is meshedly connected to the rack (203), the bottom of the rack (203) is fixedly connected to a push rod (204), the push rod (204) vertically passes through the workbench (100), and the push rod (204) extends to the bottom of the workbench (100), and the push rod (204) is fixedly connected to an arc plate (207) at one end away from the rack (203); The switching mechanism (200) further comprises a limit block (206) fixedly connected to the push rod (204), the limit block (206) being located at the bottom of the workbench (100), a first spring (205) being sleeved on the outside of the push rod (204), the first spring (205) being located outside the push rod (204) between the limit block (206) and the workbench (100); The deflection mechanism (900) comprises a connecting shaft (901) fixedly connected to the fan (104); one end of the connecting shaft (901) is fixedly connected to a driven wheel (903); a transmission shaft (905) is rotatably connected to a side of the support plate (101); a driving wheel (902) is fixedly connected to a side of the transmission shaft (905); and the driving wheel (902) and the driven wheel (903) are connected in transmission via a transmission belt (904); The outer side of the transmission shaft (905) is also fixedly connected to a second gear (907), the second gear (907) is meshedly connected to the first gear (906), and the first gear (906) is fixedly connected to the placement rack (102); the lower surface of the workbench (100) is fixedly connected to a fixed block (700), the fixed block (700) is slidably connected to an L-shaped pull rod (500), one end of the pull rod (500) is fixedly connected to a second clamping block (400), and the other end of the pull rod (500) is fixedly connected to a baffle (800), and the outer side of the pull rod (500) is sleeved with a second spring (600), and the second spring (600) is located on the outer side of the pull rod (500) between the fixed block (700) and the second clamping block (400); A first clamping block (300) is fixedly connected to the outside of the push rod (204), a top of the first clamping block (300) is provided with an inclined surface, a bottom of the second clamping block (400) is provided with an inclined surface, and the second clamping block (400) is located above the first clamping block (300).

2. A circuit board multi-sided welding tool according to claim 1, characterized in that: The cross section of the rack (203) is an I-shaped structure, the upper surface of the workbench (100) is fixedly connected to a limit rod (208), the limit rod (208) is vertically provided with a sliding groove (209), and the rack (203) is slidably connected to the limit rod (208).

3. The multi-sided welding tool for circuit boards according to claim 1, characterized in that: The vertical distance between the first clamping block (300) and the second clamping block (400) is equal to the circumference of the driving gear (202), and the placement rack (102) is in a square-shaped structure.

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