A soldering device for the production of circuit boards for new energy vehicles

Abstract

The present invention provides a welding device for the production of a circuit board for a new energy vehicle, belonging to the technical field of circuit board welding. It includes mounting brackets symmetrically installed on both sides of the welding table. The mounting bracket consists of three parts: a first connecting plate at the top and two L-shaped plates at the bottom. Among them, a first threaded hole is opened at the center of the outer wall of the top of the first connecting plate. A first threaded column is screwed on the inner wall of the first threaded hole. One end of the first threaded column is fixedly connected to a first pressing column, and the other end of the threaded column is fixedly connected to a first handle; a positioning component is used for positioning and fixing the circuit board; a limiting component is used for limiting the surface-mounted IC. By setting the limiting component, the present invention can not only limit the surface-mounted IC, but also correct the pins of the surface-mounted IC whose pins are offset due to transportation collision or other reasons, avoiding problems such as virtual soldering and solder joint misalignment after welding.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board soldering, and particularly to a soldering device for the production of new energy vehicle circuit boards. Background Art

[0002] A new energy vehicle circuit board is a board-like structure that, through specific processes, uses technologies such as etching and electroplating to form specific circuit patterns with conductive materials such as copper foil on an insulating substrate, and solders electronic components such as ICs, capacitors, and resistors to achieve specific electronic functions. It provides electrical connections and physical support for new energy vehicle electronic devices and systems, enabling various components to work together to achieve functions such as battery management and motor control.

[0003] At present, to save space and improve assembly density, surface-mounted electronic components are soldered on the circuit board. To improve production efficiency, fully automatic soldering is usually performed by machines. However, due to uncontrollable factors, problems such as uneven solder joints, false soldering, component offset, or misalignment may occur in the electronic components. To avoid waste, the detected unqualified circuit boards need to be sent for repair.

[0004] During repair, the unqualified electronic components need to be removed first and then new ones soldered on. Taking SOP package type ICs as an example, such ICs are called surface-mounted ICs, and the pins are located on both sides of the surface-mounted IC. When soldering, the repair personnel need to hold a solder bar in one hand and a soldering iron tip in the other hand, operating entirely based on experience. To avoid component offset during the soldering process, this is quite difficult for novices. In addition, during transportation, the pins of surface-mounted ICs may be offset due to collisions, etc. If directly soldered, problems such as false soldering and solder joint misalignment may occur. Therefore, it is necessary for the repair personnel to check and correct the pins with tweezers, which to a certain extent affects the repair efficiency. Therefore, the present invention provides a soldering device for the production of new energy vehicle circuit boards to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a soldering device for the production of new energy vehicle circuit boards. By setting a limiting component, not only can the surface-mounted IC be limited, avoiding the movement of the surface-mounted IC and the occurrence of component offset when the soldering iron touches the pins of the surface-mounted IC during soldering, resulting in soldering misalignment, but also the pins of the surface-mounted IC with offset pins caused by transportation collisions, etc. can be corrected, avoiding problems such as false soldering and solder joint misalignment after soldering.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A welding device for the production of a circuit board for a new energy vehicle, comprising mounting frames symmetrically installed on both sides of a welding table. The mounting frame consists of three parts: a first connecting plate at the top and two L-shaped plates at the bottom. A first threaded hole is opened at the center of the outer wall of the top of the first connecting plate. A first threaded column is screwed on the inner wall of the first threaded hole. One end of the first threaded column is fixedly connected to a first pressing column, and the other end of the threaded column is fixedly connected to a first handle; a positioning component for positioning and fixing the circuit board, the positioning component is connected to the mounting frame; a limiting component for limiting the surface-mounted IC, the limiting component is connected to the mounting frame. The limiting component includes two support columns, and the two support columns are respectively fixedly connected to the outer walls of the top of the first connecting plate close to the second connecting column. Two sliding columns are fixedly connected to the outer walls of the two support columns close to the top. A third threaded hole is opened on the outer wall of one of the support columns, and a third threaded column is screwed on the inner wall of the third threaded hole.

[0008] Optionally, the positioning component includes a first connecting rod and a second connecting rod. The two ends of the first connecting rod and the two ends of the second connecting rod are respectively fixedly connected to the outer walls of the two first connecting plates facing each other. A sliding plate is fixedly connected to the outer wall of one of the positioning protrusions close to the mounting frame. An L-shaped positioning plate is slidably connected to the outer wall of the sliding plate. A screw is screwed on the outer wall of the L-shaped positioning plate.

[0009] Optionally, a positioning support plate is fixedly connected to the outer wall of the top of the second connecting rod. A second threaded hole is opened in the middle of the outer wall of the positioning support plate. A second threaded column is screwed on the inner wall of the second threaded hole. The end of the second threaded column away from the first connecting rod is fixedly connected to a second handle. The end of the second threaded column close to the first connecting rod is rotatably connected to an abutting block, and a first rotating groove is opened on the outer wall of the abutting block close to the second threaded column.

[0010] Optionally, a third handle is fixedly connected to one end of the third threaded column. The other end of the third threaded column is rotatably connected to a sliding block. A second rotating groove is opened on the outer wall of the sliding block close to the third threaded column. First sliding grooves are respectively opened on the outer walls of the sliding block close to the two sliding columns. Two first sliding cylinders are fixedly connected to the outer wall of the sliding block close to the first connecting rod.

[0011] Optionally, a fourth threaded hole is formed in the outer wall of one side of the sliding block away from the first sliding cylinder. A fourth threaded post is screwed on the inner wall of the fourth threaded hole. One end of the fourth threaded post away from the first connecting rod is fixedly connected with a fourth handle. One end of the fourth threaded post close to the first connecting rod is rotatably connected with a limiting cylinder. A third rotating groove and two first sliding round holes are formed in the outer wall of the limiting cylinder close to the bottom. A second sliding groove is formed in the outer wall of the limiting cylinder. A first spring is fixedly connected to the inner wall of the bottom of the limiting cylinder.

[0012] Optionally, an avoidance hole is formed in the inner wall of the bottom of the limiting cylinder. A pushing round rod is slidably connected to the inner wall of the avoidance hole. One end of the pushing round rod is fixedly connected with a pushing cylinder. A pushing handle is fixedly connected to the outer wall of the pushing cylinder. The other end of the pushing round rod is fixedly connected with a second pressing round plate. Two limiting columns are symmetrically and fixedly connected to the outer wall of the pushing round rod close to the outer wall of the second pressing round plate.

[0013] Optionally, one end of the first spring is fixedly connected with a limiting round plate. A pulling spring is fixedly connected to the outer wall of the bottom of the limiting cylinder. One end of the pulling spring is fixedly connected with a pushing plate. A limiting sliding groove is formed in the center position of the top outer wall of the pushing plate. A plurality of straightening columns are symmetrically and fixedly connected to the outer walls on both sides of the pushing plate. L-shaped connecting plates are symmetrically and fixedly connected to both sides of the top outer wall of the pushing plate.

[0014] Optionally, second springs are fixedly connected to the outer walls of both sides of the two L-shaped connecting plates close to the second sliding round holes at the bottom. Second sliding round holes are respectively formed in the outer walls of the two L-shaped connecting plates away from the pushing plate. Second sliding cylinders are respectively slidably connected to the inner walls of the two second sliding round holes. One end of each of the two second sliding cylinders is fixedly connected with a U-shaped fixing plate. The other ends of the two second sliding cylinders are fixedly connected with the same straightening base.

[0015] Optionally, an avoidance groove is formed in the middle of the straightening base. A plurality of straightening grooves are symmetrically formed in the inner walls on both sides of the avoidance groove. A plurality of limiting grooves are formed in the outer wall of the bottom of the straightening base and are distributed in a linear array. Two limiting elastic sheets are clamped and fixed to the outer walls of the straightening base close to both ends respectively.

[0016] Optionally, the limiting elastic piece includes two first clamping plates, two second clamping plates, two third clamping plates, two fourth clamping plates, a fifth clamping plate and a sixth clamping plate. The outer wall of the first clamping plate is closely attached to the top outer wall of the straightening base, and the outer wall of the third clamping plate is closely attached to the bottom outer wall of the straightening base. The first clamping plate and the third clamping plate are respectively fixedly connected to both ends of the second clamping plate. One end of the third clamping plate away from the second clamping plate is fixedly connected to a fourth clamping plate, and the other end of the fourth clamping plate is fixedly connected to a fifth clamping plate. A sixth clamping plate is fixedly connected to the outer wall of one side of the fifth clamping plate close to the central axis of the straightening base.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above solution, by setting the limiting component, not only can the surface-mounted IC be limited, avoiding its displacement caused by the soldering iron touching the pins of the surface-mounted IC during the soldering process, thereby preventing the phenomenon of soldering misalignment, but also the pins of the surface-mounted IC with offset pins due to transportation collision or other reasons can be straightened, avoiding problems such as virtual soldering or solder joint misalignment after soldering.

[0019] By setting the positioning component, not only can the circuit board be fixed at a specified position, avoiding the need to find a suitable position to fix the next circuit board again after soldering is completed, thereby saving maintenance time and improving the efficiency of maintenance work, but also the circuit board can be not damaged during the process of fixing the circuit board, avoiding unnecessary losses.

[0020] By setting a positioning protrusion, an L-shaped positioning plate and an abutting block in the positioning component, the circuit board can be quickly fixed at a suitable position by rotating the second handle, and it is convenient to replace the next circuit board to be soldered. This is not only convenient for subsequent soldering of the surface-mounted IC, but also can avoid damaging the circuit board when fixing the circuit board, thereby reducing the additional expenditure of maintenance costs.

[0021] By setting a third threaded post, a fourth threaded post, a third handle, a fourth handle and a sliding block in the limiting component, the position of the limiting cylinder can be adjusted by respectively screwing the third handle and the fourth handle according to the position of the solder joints of the surface-mounted IC on the circuit board, so that the limiting cylinder is located directly above the solder joints of the surface-mounted IC, thereby providing an accurate positioning effect for the surface-mounted IC and avoiding adjusting the position of the limiting cylinder again during subsequent soldering.

[0022] By arranging a push handle, a push rod, a push cylinder, a push plate, a straightening column and a straightening base in the limit assembly, the push handle can be slid to push the push plate to move, and the straightening groove on the straightening base can correct the bent pins on the surface mount IC when the surface mount IC is pushed to the bottom of the avoidance groove by the second pressing circular plate and fits on the top outer wall of the circuit board. At the same time, the straightening column squeezes the pins to make them fit closely to the surface of the solder joint on the circuit board, thereby avoiding problems such as cold solder joints or solder joint misalignment during welding.

[0023] By setting a limiting elastic sheet and a limiting groove on the limiting assembly, the position of the limiting elastic sheet can be adjusted by moving it to adapt to the size of the surface mount IC. At the same time, the sixth clamping plate on the limiting elastic sheet can clamp the two ends of the surface mount IC to prevent it from slipping out of the avoidance groove during the movement of the propulsion plate, thereby avoiding affecting subsequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0025] Figure 1 This is a first-person perspective schematic diagram of the three-dimensional structure of a welding device used in the production of new energy vehicle circuit boards;

[0026] Figure 2 This is a second-angle perspective schematic diagram of the three-dimensional structure of a welding device used in the production of new energy vehicle circuit boards;

[0027] Figure 3 It is a schematic diagram of the enlarged three-dimensional structure of the mounting frame, the support column and the sliding column;

[0028] Figure 4 It is a schematic diagram of an enlarged three-dimensional structure of the mounting frame, the support column, the first threaded column and the fourth threaded column;

[0029] Figure 5 It is a schematic diagram of an enlarged three-dimensional structure of the mounting frame, the support column and the first sliding cylinder;

[0030] Figure 6 This is an enlarged three-dimensional structural diagram of the positioning protrusion and the L-shaped positioning plate;

[0031] Figure 7 It is a schematic diagram of an enlarged three-dimensional structure of the abutment block and the first rotation groove;

[0032] Figure 8 It is a schematic diagram of an enlarged three-dimensional structure of the stopper cylinder, the sliding block and the first sliding cylinder;

[0033] Figure 9Schematic diagram of the enlarged three-dimensional structure of the limiting cylinder, tension spring, pushing plate and straightening base;

[0034] Figure 10 Schematic diagram of the enlarged half-section three-dimensional structure of the limiting cylinder, tension spring and first spring;

[0035] Figure 11 Schematic diagram of the enlarged three-dimensional structure of the pushing round rod, limiting column and pushing handle;

[0036] Figure 12 Schematic diagram of the enlarged three-dimensional structure of the straightening base, limiting elastic piece and pushing plate;

[0037] Figure 13 Schematic diagram of the enlarged three-dimensional structure of the pushing plate and straightening column;

[0038] Figure 14 Schematic diagram of the enlarged three-dimensional structure of the straightening base, second spring and U-shaped fixing plate;

[0039] Figure 15 Schematic diagram of the enlarged three-dimensional structure of the limiting elastic piece.

[0040] Reference numerals:

[0041] 1. Mounting bracket; 101. L-shaped plate; 102. First connecting plate; 103. First connecting rod; 104. First threaded column; 105. First handle; 106. First pressing column; 107. Second connecting rod; 108. Positioning support plate; 109. Second threaded hole; 110. First threaded hole; 2. Positioning protrusion; 201. Sliding plate; 202. L-shaped positioning plate; 203. Screw; 204. Second threaded column; 205. Second handle; 206. Contact block; 207. Segmented groove; 208. First rotating groove; 3. Support column; 301. Sliding column; 302. Third threaded hole; 303. Third threaded column; 304. Third handle; 4. Sliding block; 401. First sliding groove; 402. Second rotating groove; 403. Fourth threaded hole; 404. First sliding cylinder; 405. Fourth threaded column; 406. Fourth handle; 407. First sliding round hole; 408. Third rotating groove; 5. Limiting cylinder; 501. Second sliding groove; 502. First spring; 503. Limiting round plate; 504. Tension spring; 505. Avoidance hole; 506. Pushing round rod; 507. Pushing cylinder; 508. Pushing handle; 509. Limiting column; 510. Second pressing round plate; 6. Pushing plate; 601. Straightening column; 602. L-shaped connecting plate; 603. Second sliding round hole; 604. Limiting sliding groove; 7. Straightening base; 701. Straightening groove; 702. U-shaped fixing plate; 703. Second spring; 704. Second sliding cylinder; 705. Limiting groove; 8. Limiting elastic piece; 801. First clamping plate; 802. Second clamping plate; 803. Third clamping plate; 804. Fourth clamping plate; 805. Fifth clamping plate; 806. Sixth clamping plate.

[0042] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0043] The following describes in detail a welding device for the production of new energy vehicle circuit boards provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0044] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. Additionally, when describing a specific feature, structure, or characteristic in connection with an embodiment, implementing such feature, structure, or characteristic in connection with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0045] As Figures 1 to 15 shown, an embodiment of the present invention provides a soldering device for the production of a new energy vehicle circuit board, including mounting brackets 1 symmetrically installed on both sides of the soldering table. The mounting bracket 1 consists of three parts: a first connecting plate 102 at the top and two L-shaped plates 101 at the bottom. A first threaded hole 110 is opened at the center of the outer wall of the top of the first connecting plate 102. A first threaded column 104 is screwed on the inner wall of the first threaded hole 110. One end of the first threaded column 104 is fixedly connected to a first pressing column 106, and the other end of the threaded column is fixedly connected to a first handle 105. A positioning component is used to position and fix the circuit board and is connected to the mounting bracket 1. A limiting component is used to limit the surface-mounted IC and is connected to the mounting bracket 1.

[0046] Specifically, two mounting brackets 1 are symmetrically installed on both sides of the soldering table. The mounting bracket 1 is made of metal. Two L-shaped plates 101 made of "L"-shaped metal are symmetrically and fixedly connected to both sides of the outer wall of the bottom of the first connecting plate 102. The first connecting plate 102 is a rectangular metal plate. The first threaded hole 110 is opened at the central position of the outer wall of the top of the first connecting plate 102. The first threaded hole 110 is a round hole with a threaded groove on its inner wall. The first threaded column 104 is screwed on the inner wall of the first threaded hole 110. The first threaded column 104 is a plastic cylinder with a threaded groove on its outer wall, and the outer wall contour of the first threaded column 104 matches the inner wall contour of the first threaded hole 110. Therefore, the first threaded column 104 can rotate within the first threaded hole 110. The first pressing column 106 is fixedly connected to the end of the first threaded column 104 close to the soldering table. The first pressing column 106 is a plastic cylinder. The end of the first threaded column 104 far from the soldering table is fixedly connected to a first handle 105. The first handle 105 is a plastic cylinder with an anti-slip groove on its outer wall. In this way, by turning the two first handles 105, the two first threaded columns 104 can be rotated to move towards the soldering table until the two first pressing columns 106 abut against the outer wall of the top of the soldering table, so as to install the mounting bracket 1 on the soldering table.

[0047] By providing a positioning component, this application can not only fix the circuit board in a specified position, avoiding the need to find a suitable position for the next circuit board after soldering is completed, thus saving repair time and improving the efficiency of repair work, but also prevent damage to the circuit board during the process of fixing it, avoiding unnecessary losses. By providing a limiting component, it can not only limit the surface-mounted IC, preventing the pins of the surface-mounted IC from shifting due to contact with the soldering iron during soldering, thus preventing the occurrence of soldering misalignment, but also correct the pins of the surface-mounted IC whose pins have shifted due to reasons such as transportation collision, avoiding problems such as poor soldering or solder joint misalignment after soldering.

[0048] In this embodiment, as Figures 1 to 7As shown in the figure, the positioning component includes a first connecting rod 103 and a second connecting rod 107. The two ends of the first connecting rod 103 and the two ends of the second connecting rod 107 are respectively fixedly connected to the outer walls of two first connecting plates 102 facing each other. Both the first connecting rod 103 and the second connecting rod 107 are rectangular parallelepipeds made of metal. A positioning protrusion 2 is slidably connected to the outer wall of the first connecting rod 103. The positioning protrusion 2 is composed of two parts: a stepped plastic plate at the top and a hollow plastic rectangular parallelepiped at the bottom. The inner wall contour of the part with the hollow plastic rectangular parallelepiped is adapted to the outer wall contour of the first connecting rod 103. Therefore, the two positioning protrusions 2 can slide on the outer wall of the first connecting rod 103, and the part with the stepped plastic plate can support the circuit board. A sliding plate 201 is fixedly connected to the outer wall of one of the positioning protrusions 2 close to the mounting bracket 1. The sliding plate 201 is a rectangular plastic plate with a curved end. An L-shaped positioning plate 202 is slidably connected to the outer wall of the sliding plate 201. The L-shaped positioning plate 202 is composed of an "L"-shaped plastic plate and a hollow plastic rectangular parallelepiped. The inner wall contour of the part with the hollow plastic rectangular parallelepiped on the L-shaped positioning plate 202 is adapted to the outer wall contour of the sliding plate 201. Therefore, the L-shaped positioning plate 202 can slide on the outer wall of the sliding plate 201, and the "L"-shaped plastic plate on the L-shaped positioning plate 202 can be attached to one side of the circuit board and limit it. A screw 203 is screwed on the top outer wall of the part with the hollow plastic rectangular parallelepiped on the L-shaped positioning plate 202. The L-shaped positioning plate 202 can be slid to an appropriate position according to the arrangement of the electronic components on the circuit board to avoid squeezing the electronic components extending beyond the edge of the circuit board. Then, by tightening the screw 203, the L-shaped positioning plate 202 is fixed on the outer wall of the sliding plate 201. In this way, by adjusting the positions of the positioning protrusion 2 and the L-shaped positioning plate 202, it can be avoided that the positioning protrusion 2 and the L-shaped positioning plate 202 squeeze the electronic components beyond the edge of the circuit board when fixing the circuit board. A positioning support plate 108 is fixedly connected to the top outer wall of the second connecting rod 107. The positioning support plate 108 is a rectangular metal plate with a curved end. A second threaded hole 109 is opened in the middle of the outer wall of the positioning support plate 108. The second threaded hole 109 is a circular hole groove with a threaded groove on the inner wall. A second threaded post 204 is screwed on the inner wall of the second threaded hole 109. The second threaded post 204 is a plastic cylinder with a threaded groove on the outer wall, and a circular plate-shaped protrusion is provided at one end close to the first connecting rod 103. A second grip 205 is fixedly connected to the end of the second threaded post 204 far from the first connecting rod 103. The second grip 205 is a plastic cylinder with an anti-slip groove on the outer wall. An abutting block 206 is rotatably connected to the end of the second threaded post 204 close to the first connecting rod 103. The abutting block 206 is composed of two parts: a "W"-shaped rubber plate and a plastic rectangular parallelepiped. Both ends of the "W"-shaped rubber plate are fixedly connected to the outer wall of the plastic rectangular parallelepiped on the side far from the second threaded post 204.A plurality of segmented grooves 207 are provided on the outer wall of the "W"-shaped rubber plate, and a first rotation groove 208 is provided on the outer wall of one side of the abutment block 206 close to the second threaded column 204. The first rotation groove 208 is a circular groove with a "convex" shape in cross section, and the inner wall contour of the first rotation groove 208 is matched with the contour of one end of the second threaded column 204 with a circular plate-shaped protrusion, so the second threaded column 204 can rotate on the inner wall of the first rotation groove 208. When the maintenance personnel rotate the second handle 205, the second threaded column 204 will rotate on the inner wall of the second threaded hole 109 toward the direction of the first connecting rod 103. The second handle 205 is rotated to move the abutting block 206 toward the first connecting rod 103. At this time, the part of the abutting block 206 with the "W"-shaped rubber plate will contact the edge of the circuit board and deform along its bending direction, and can cooperate with the positioning protrusion 2 and the L-shaped positioning plate 202 to fix the circuit board in a proper position. Through the above structural setting, the circuit board can be quickly fixed in a proper position and the next circuit board to be welded can be replaced by rotating the second handle 205, which is not only convenient for subsequent welding of surface mount ICs, but also can avoid damaging the circuit board when fixing the circuit board, thereby reducing the loss of maintenance costs.

[0049] In this embodiment, if Figures 1 to 5 and Figures 8 to 15As shown, the limiting component includes two support columns 3, which are respectively fixedly connected to the outer walls of the top of the first connecting plate 102 near the second connecting column. The support column 3 is a metal cuboid. On one side outer wall of the support column 3 near the top, two sliding columns 301 are fixedly connected. The sliding column 301 is a metal square column, and the two sliding columns 301 and the two support columns 3 are of an integrated structure, and the overall contour is in the shape of a "door". On one side outer wall of one of the support columns 3, a third threaded hole 302 is opened. The third threaded hole 302 is a circular hole groove with a thread groove provided on the inner wall. A third threaded column 303 is screwed on the inner wall of the third threaded hole 302. The third threaded column 303 is a plastic cylinder with a thread groove provided on the outer wall and a circular plate-shaped protrusion provided at one end. The other end of the third threaded column 303 is fixedly connected to a third handle 304. The third handle 304 is a plastic cylinder with an anti-slip groove provided on the outer wall. The other end of the third threaded column 303 is rotatably connected to a sliding block 4. The sliding block 4 is a metal cuboid. On one side outer wall of the sliding block 4 near the third threaded column 303, a second rotating groove 402 is opened. The second rotating groove 402 is a circular groove with a cross-section in the shape of a "convex", and the inner wall contour of the second rotating groove 402 is adapted to the contour of the end of the third threaded column 303 away from the third handle 304. Therefore, the third threaded column 303 rotates on the inner wall of the second rotating groove 402, and on the two side outer walls of the sliding block 4 near the two sliding columns 301, first sliding grooves 401 are respectively opened. The first sliding groove 401 is a square groove body, and the inner wall contour of the first sliding groove 401 is adapted to the outer wall contour of the sliding column 301. Therefore, the sliding block 4 can slide on the outer walls of the two sliding columns 301 and is limited by the two sliding columns 301 without shaking. In this way, by rotating the third handle 304, the third threaded column 303 will rotate on the inner wall of the third threaded hole 302 and move towards the direction of the support column 3 without the third threaded hole 302, and push the sliding block 4 to displace in the same direction. In this way, the position of the sliding block 4 can be adjusted by screwing the third handle 304.

[0050] In this embodiment, as Figures 1 to 5 and Figure 8As shown in the figure, two first sliding cylinders 404 are fixedly connected to the outer wall of one side of the sliding block 4 close to the first connecting rod 103. The first sliding cylinders 404 are metal cylinders. A fourth threaded hole 403 is formed on the outer wall of the side of the sliding block 4 away from the first sliding cylinders 404, and the fourth threaded hole 403 is a circular hole groove with a thread groove on its inner wall. Among them, the two first sliding cylinders 404 are symmetrical about the fourth threaded hole 403. A fourth threaded post 405 is screwed on the inner wall of the fourth threaded hole 403. The fourth threaded post 405 is a plastic cylinder with a thread groove on its outer wall, and a round plate-shaped protrusion is provided at one end close to the first connecting rod 103. Since the outer wall contour of the fourth threaded post 405 is adapted to the inner wall contour of the fourth threaded hole 403, the fourth threaded post 405 can rotate on the inner wall of the fourth threaded hole 403. A fourth grip 406 is fixedly connected to the end of the fourth threaded post 405 away from the first connecting rod 103. The fourth grip 406 is a plastic cylinder with a thread groove on its outer wall. The fourth threaded post 405 can be driven to rotate by twisting the fourth grip 406. A limiting cylinder 5 is rotatably connected to the end of the fourth threaded post 405 close to the first connecting rod 103. The limiting cylinder 5 is composed of two parts: a hollow plastic cylinder and a cuboid with arcs at both ends at the bottom. Among them, the cuboid with arcs at both ends is fixedly connected to the outer wall of the hollow plastic cylinder close to the bottom. A third rotation groove 408 and two first sliding round holes 407 are formed on the outer wall of the limiting cylinder 5 close to the bottom. The third rotation groove 408 is a circular groove with a cross-section in the shape of a "convex", and the first sliding round hole 407 is a circular hole groove, and it penetrates out from the outer wall of the part of the limiting cylinder 5 with a cuboid with arcs at both ends. Since the inner wall contour of the third rotation groove 408 is adapted to the contour of the end of the fourth threaded post 405 away from the fourth grip 406, the fourth threaded post 405 can rotate on the inner wall of the fourth threaded hole 403. And the inner wall contour of the first sliding round hole 407 is adapted to the outer wall contour of the first sliding cylinder 404, so the limiting cylinder 5 can slide on the first sliding cylinder 404. When the fourth grip 406 is twisted, the fourth threaded post 405 will rotate on the inner wall of the fourth threaded hole 403 and move in the direction of the first connecting rod 103, and push the limiting cylinder 5 to move in the direction of the first connecting rod 103 along the outer wall of the first sliding cylinder 404. The above structural settings can adjust the position of the limiting cylinder 5 by twisting the third grip 304 and the fourth grip 406 respectively according to the position of the surface-mounted IC solder joints on the upper surface of the circuit board, so that the limiting cylinder 5 is located directly above the surface-mounted IC solder joints, thereby providing an accurate positioning effect for the surface-mounted IC and avoiding readjusting the position of the limiting cylinder 5 during subsequent soldering.

[0051] In this embodiment, as Figures 8 to 11As shown, a second sliding groove 501 is formed on the outer wall of the limiting cylinder 5. The overall contour of the second sliding groove 501 is a groove in the shape of a "C". Moreover, the width of the groove at the end of the second sliding groove 501 near the top of the limiting cylinder 5 is greater than that at the end near the bottom of the limiting cylinder 5. An avoidance hole 505 is formed on the inner wall at the bottom of the limiting cylinder 5. The avoidance hole 505 is a circular hole groove. One end of a first spring 502 is fixedly connected to the inner wall at the bottom of the limiting cylinder 5. The first spring 502 is disclosed in the prior art, so no further description will be given. The other end of the first spring 502 is fixedly connected to a limiting circular plate 503. The limiting circular plate 503 is a hollow plastic circular plate. By squeezing the limiting circular plate 503, when the first spring 502 is stressed, it will deform along its bending direction. One end of a tension spring 504 is fixedly connected to the outer wall at the bottom of the limiting cylinder 5. The tension spring 504 is disclosed in the prior art, so no further description will be given. The other end of the tension spring 504 is fixedly connected to a pushing plate 6. The pushing plate 6 is a square metal plate. When the pushing circular plate is pushed to move away from the limiting cylinder 5, the tension spring 504 will be stressed and deform along its bending direction. When the tension spring 504 is no longer stressed, it will recover its deformation under the action of its own elasticity and drive the pushing plate 6 to move towards the limiting cylinder 5. A limiting sliding groove 604 is formed at the center of the outer wall at the top of the pushing plate 6. The limiting sliding groove 604 is a groove composed of a rectangular part at both ends and a circular part in the middle. A pushing circular rod 506 is slidably connected to the inner wall of the avoidance hole 505. The pushing circular rod 506 is a plastic cylinder. The outer wall contour of the pushing circular rod 506 is adapted to the inner wall contour of the avoidance hole 505. Therefore, the pushing circular rod 506 can slide on the inner wall of the avoidance hole 505. And the end of the pushing circular rod 506 facing the inside of the limiting cylinder 5 will pass through the circular hole on the limiting circular plate 503. One end of the pushing circular rod 506 passing through the circular hole on the limiting circular plate 503 is fixedly connected to a pushing cylinder 507. The pushing cylinder 507 is a plastic cylinder. A pushing handle 508 is fixedly connected to the outer wall of the pushing cylinder 507. The pushing handle 508 is a square plastic plate with a curved end. The other end of the pushing circular rod 506 is fixedly connected to a second pressing circular plate 510. The second pressing circular plate 510 is a plastic circular plate. Two limiting columns 509 are symmetrically and fixedly connected to the outer wall of the pushing circular rod 506 near the outer wall of the second pressing circular plate 510. The limiting columns 509 are plastic rectangles. The outer wall contour of the pushing circular rod 506 is adapted to the circular groove contour of the limiting sliding groove 604. Therefore, the pushing circular rod 506 can slide on the inner wall of the limiting sliding groove 604. And the outer wall contours of the two limiting columns 509 are adapted to the contours of the two rectangular grooves on the limiting sliding groove 604. Therefore, the two limiting columns 509 can pass through the two rectangular grooves provided on the limiting sliding groove 604.

[0052] When holding the propulsion handle 508 and sliding along the inner wall of the second sliding groove 501 towards the bottom end of the limiting cylinder 5, the propulsion cylinder 507 will move towards the bottom end of the limiting cylinder 5 following the propulsion handle 508. The propulsion cylinder 507 will push the limiting circular plate 503 towards the bottom end of the limiting cylinder 5. At this time, the limiting circular plate 503 will cause the first spring 502 to be stressed and deform along its bending direction. The outer wall of the top of the propulsion plate 6 will move away from the limiting cylinder 5 under the resistance of the limiting post 509 on the propulsion round rod 506. At this time, the tension spring 504 will be stressed and move along its bending direction. When the propulsion handle 508 abuts against the inner wall at the bottom end of the second sliding groove 501, rotating the propulsion handle 508 horizontally will cause the propulsion handle 508 to rotate to the limiting position of the second sliding groove 501, and the propulsion round rod 506 will also rotate following the propulsion handle 508. At this time, the two limiting posts 509 will rotate into the two rectangular grooves provided on the limiting sliding groove 604 during the rotation. At this time, the two limiting posts 509 no longer abut against the propulsion plate 6, and the tension spring 504 will no longer be stressed and will recover its deformation under the action of its own elasticity, and drive the propulsion plate 6 to move towards the limiting cylinder 5. Such a setting can push the propulsion plate 6 to move by sliding the propulsion handle 508.

[0053] In this embodiment, as Figures 12 to 15As shown, a number of straightening columns 601 are symmetrically and fixedly connected to the outer walls on both sides of the pushing plate 6. The straightening columns 601 are metal rectangular parallelepipeds. On both sides of the top outer wall of the pushing plate 6, L-shaped connecting plates 602 are symmetrically and fixedly connected. The L-shaped connecting plates 602 are "L"-shaped metal plates. Among them, the pushing plate 6, the straightening columns 601 and the L-shaped connecting plates 602 are of an integrated structure. Second sliding round holes 603 are respectively formed on the outer walls of the two L-shaped connecting plates 602 away from one end of the pushing plate 6. The second sliding round holes 603 are circular grooves. Second sliding cylinders 704 are respectively slidably connected to the inner walls of the two second sliding round holes 603. The second sliding cylinders 704 are metal cylinders, and the outer wall contour of the second sliding cylinders 704 is adapted to the inner wall contour of the second sliding round holes 603. Therefore, the L-shaped connecting plates 602 can slide on the outer walls of the second sliding cylinders 704. One ends of the two second sliding cylinders 704 are respectively fixedly connected with U-shaped fixing plates 702. The U-shaped fixing plates 702 are inverted "U"-shaped metal plates. The other ends of the second sliding cylinders 704 are fixedly connected with straightening bases 7. The straightening bases 7 are metal rectangular parallelepipeds. Among them, both ends of the two U-shaped fixing plates are fixedly connected to both sides of the top outer wall of the same straightening base 7. Second springs 703 are respectively fixedly connected to the outer walls of the two L-shaped connecting plates 602 near the second sliding round holes 603. The second springs 703 are disclosed in the prior art, so no further description will be given. When the second springs 703 are stressed, they will deform along their bending directions. An avoidance groove is formed in the middle of the straightening base 7. The avoidance groove is a rectangular groove, and a chamfer is provided at the position of the avoidance groove close to the top outer wall of the straightening base 7. This can facilitate the surface-mounted IC to slide into the avoidance groove and has a guiding effect on the surface-mounted IC. A number of straightening grooves 701 are symmetrically formed on the inner walls on both sides of the avoidance groove. The straightening grooves 701 are rectangular grooves, and a chamfer is provided at the position of the straightening grooves 701 close to the top outer wall of the straightening base 7. This can facilitate the pins of the surface-mounted IC to slide into the straightening grooves 701 and has a guiding effect on the pins of the surface-mounted IC. The inner wall contour of the straightening grooves 701 is adapted to the pin contour of the surface-mounted IC. Therefore, the pins of the surface-mounted IC can slide on the inner walls of the straightening grooves 701.

[0054] During the process of the second pressing circular plate 510 pushing the surface-mounted IC, since a chamfer is provided at the position of the avoidance groove close to the outer wall of the top of the straightening base 7, the surface-mounted IC can be guided to smoothly slide into the avoidance groove. Subsequently, the straightening base 7 will move towards the circuit board following the pushing plate 6 until the outer wall of the bottom of the straightening base 7 fits against the outer wall of the top of the circuit board. When the pushing plate 6 continues to move towards the circuit board, the L-shaped connecting plate 602 will also move towards the circuit board following the pushing plate 6, and the second spring 703 will be deformed along its bending direction under force. During this process, the surface-mounted IC will be pushed by the second pressing circular plate 510 to the bottom end of the avoidance groove and fit against the outer wall of the top of the circuit board. At the same time, the pins of the surface-mounted IC will slide into the straightening groove 701 under the guidance of the chamfer at the top end of the straightening groove 701. The straightening groove 701 will correct the bent pins, and the straightening post 601 will squeeze the pins to make them closely fit against the surface at the solder joints on the circuit board. With the above structural settings, the pushing plate 6 can be moved by sliding the pushing handle 508. Also, during the process of the surface-mounted IC being pushed by the second pressing circular plate 510 to the bottom end of the avoidance groove and fitting against the outer wall of the top of the circuit board, the straightening groove 701 on the straightening base 7 can correct the bent pins on the surface-mounted IC. In addition, the straightening post 601 will squeeze the pins to make them fit against the surface at the solder joints on the circuit board, avoiding problems such as false soldering and solder joint misalignment during welding.

[0055] A plurality of limiting grooves 705 distributed in a linear array are provided on the bottom outer wall of the straightening base 7, and the limiting grooves 705 are square grooves. Two limiting elastic sheets 8 are clamped and fixed on the outer walls of the straightening base 7 close to both ends, and the limiting elastic sheets 8 include two first clamping plates 801, two second clamping plates 802, two third clamping plates 803, two fourth clamping plates 804, a fifth clamping plate 805 and a sixth clamping plate 806, wherein the outer wall of the first clamping plate 801 is in close contact with the top outer wall of the straightening base 7, the first clamping plate 801 is an "L"-shaped plastic plate, and the outer wall of the third clamping plate 803 is in close contact with the top outer wall of the straightening base 7. The bottom outer wall of the straightening base 7, the third clamping plate 803 is an "L" shaped plastic plate, and the contour of the limiting groove 705 is adapted to the contour on the outer wall of the third clamping plate 803, so the third clamping plate 803 can be stuck on the inner wall of the limiting groove 705, that is, the limiting groove 705 can limit the limiting elastic sheet 8, and the end of the first clamping plate 801 away from the top outer wall of the straightening base 7 and the end of the third clamping plate 803 away from the bottom outer wall of the straightening base 7 are respectively fixedly connected to the two ends of the second clamping plate 802, and the second clamping plate 802 is a "C" shaped plastic plate. When the second clamping plate 802 is subjected to force, By deforming along the direction of its bending, the third clamping plate 803 can slide out of the limiting groove 705, releasing the limiting of the limiting elastic sheet 8, and the two limiting elastic sheets 8 can be moved to adjust the position to adapt to the size of the surface mounted IC. The end of the third clamping plate 803 away from the second clamping plate 802 is fixedly connected to the fourth clamping plate 804, and the fourth clamping plate 804 is an "S"-shaped plastic plate. When the fourth clamping plate 804 is subjected to force, it will deform along the direction of its bending, and the other end of the fourth clamping plate 804 is fixedly connected to the fifth clamping plate 805, and the fifth clamping plate 805 is a plastic straight plate. A sixth clamping plate 806 is fixedly connected to the outer wall of one side of the holding plate 805 close to the central axis of the straightening base 7. The sixth clamping plate 806 is an arc-shaped plastic plate. When the sixth clamping plate 806 is subjected to force, the two ends of the surface mount IC are clamped to prevent it from slipping out of the avoidance groove. The above structural setting can adjust the limit elastic position by moving the limit elastic sheet 8 to adapt to the size of the surface mount IC, and the sixth clamping plate 806 on the limit elastic sheet 8 can clamp the two ends of the surface mount IC to prevent the surface mount IC from slipping out of the avoidance groove during the movement of the propulsion plate 6, affecting subsequent operations.

[0056] The working principle of the technical solution provided by the present invention is as follows:

[0057] During use, maintenance personnel can rotate two first handles 105 to make two first threaded posts 104 rotate and move towards the soldering table until two first pressing posts 106 abut against the outer wall of the top of the soldering table, thereby fixing the mounting bracket 1 on the soldering table. Subsequently, slide the L-shaped positioning plate 202 to an appropriate position and fix it on the outer wall of the sliding plate 201 by tightening the screw 203. By adjusting the positions of the positioning protrusion 2 and the L-shaped positioning plate 202, it is possible to prevent the positioning protrusion 2 and the L-shaped positioning plate 202 from squeezing the electronic components beyond the edge of the circuit board when fixing the circuit board.

[0058] Next, rotate the second handle 205 to make the second threaded post 204 rotate in the second threaded hole 109 and move towards the direction of the first connecting rod 103, pushing the abutting block 206 to move towards the first connecting rod 103. At this time, the part of the abutting block 206 with the "W"-shaped rubber plate will abut against the circuit board and deform along its bending direction, cooperating with the positioning protrusion 2 and the L-shaped positioning plate 202 to fix the circuit board in place.

[0059] Then, rotate the third handle 304 to make the third threaded post 303 rotate in the third threaded hole 302 and move towards the support column 3 without the third threaded hole 302 being opened, pushing the sliding block 4 to move in the same direction. Next, rotate the fourth handle 406 to make the fourth threaded post 405 rotate in the fourth threaded hole 403 and move towards the first connecting rod 103, pushing the limiting cylinder 5 to move along the outer wall of the first sliding cylinder 404 towards the first connecting rod 103. By rotating the third handle 304 and the fourth handle 406 respectively, the position of the limiting cylinder 5 can be adjusted according to the position of the surface-mounted IC solder joints on the upper surface of the circuit board so that it is directly above the surface-mounted IC solder joints, providing a positioning effect for the surface-mounted IC and avoiding readjusting the position of the limiting cylinder 5 during subsequent soldering.

[0060] At this time, place the new surface-mounted IC into the avoidance groove at the top of the straightening base 7. Hold the pushing handle 508 and slide along the inner wall of the second sliding groove 501 towards the bottom end of the limiting cylinder 5. The pushing cylinder 507 will follow the pushing handle 508 and move towards the bottom end of the limiting cylinder 5, and push the limiting circular plate 503 towards the bottom end of the limiting cylinder 5. At this time, the limiting circular plate 503 will cause the first spring 502 to be stressed and deform along its bending direction. At the same time, the outer wall of the top of the pushing plate 6 will move away from the limiting cylinder 5 under the abutment of the limiting post 509 on the pushing round rod 506, and the tension spring 504 will be stressed and deform along its bending direction. When the pushing handle 508 abuts against the inner wall at the bottom end of the second sliding groove 501, the second pressing circular plate 510 will abut against the outer wall of the top of the surface-mounted IC, fixing the surface-mounted IC at the position on the circuit board where welding is required.

[0061] During the process of the second pressing circular plate 510 pushing the surface-mounted IC, the chamfer at the outer wall of the straightening base 7 near the avoidance groove can guide the surface-mounted IC to slide into the avoidance groove. At this time, the sixth clamping plate 806 is stressed and clamps both ends of the surface-mounted IC to prevent it from sliding out of the avoidance groove. The straightening base 7 will move towards the circuit board following the pushing plate 6 until the outer wall of its bottom fits against the outer wall of the top of the circuit board. When the pushing plate 6 continues to move towards the circuit board, the L-shaped connecting plate 602 will move towards the circuit board following the pushing plate 6, and the second spring 703 will be stressed and deformed along its bending direction. The surface-mounted IC is pushed by the second pressing circular plate 510 to the bottom end of the avoidance groove and fits against the outer wall of the top of the circuit board. The pins of the surface-mounted IC slide into the straightening groove 701 under the guidance of the chamfer at the top end of the straightening groove 701. The straightening groove 701 will correct the bent pins, and the straightening column 601 will squeeze the pins to make them fit against the surface at the solder joints on the circuit board.

[0062] Subsequently, rotate the pushing handle 508 horizontally until it reaches the limit position of the second sliding groove 501, and the pushing round rod 506 will also rotate following the pushing handle 508. At this time, the two limit posts 509 will rotate into the two rectangular grooves provided on the limit sliding groove 604 during the rotation. At this time, the two limit posts 509 no longer resist the pushing plate 6, the tension spring 504 is no longer stressed, and it recovers its deformation under its own elastic force and drives the pushing plate 6 to move towards the limit cylinder 5. At this time, the welding operation can be carried out.

[0063] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the essence and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A welding device for producing new energy vehicle circuit boards, characterized in that: The mounting frame comprises a mounting frame symmetrically mounted on both sides of the welding table, the mounting frame is composed of three parts, namely, a first connecting plate at the top and two L-shaped plates at the bottom, wherein a first threaded hole is opened at the center of the top outer wall of the first connecting plate, a first threaded column is screwed on the inner wall of the first threaded hole, one end of the first threaded column is fixedly connected to a first pressing column, and the other end of the threaded column is fixedly connected to a first handle; A positioning assembly, the positioning assembly is used to position and fix the circuit board, and the positioning assembly is connected to the mounting frame; A limit assembly, the limit assembly is used to limit the surface mount IC, the limit assembly is connected to the mounting frame, the limit assembly includes two support columns and a limit cylinder, the two support columns are respectively fixedly connected to the outer wall of the top of the first connecting plate close to the second connecting column, two sliding columns are fixedly connected to the outer wall of one side of the two support columns close to the top, a third threaded hole is opened on the outer wall of one side of one of the support columns, and a third threaded column is screwed on the inner wall of the third threaded hole; A second sliding groove is provided on the outer wall of the limiting cylinder, and a first spring is fixedly connected to the inner wall of the bottom of the limiting cylinder; An avoidance hole is provided on the inner wall of the bottom of the limiting cylinder, a propulsion round rod is slidably connected to the inner wall of the avoidance hole, one end of the propulsion round rod is fixedly connected to a propulsion cylinder, an outer wall of the propulsion cylinder is fixedly connected to a propulsion handle, the other end of the propulsion round rod is fixedly connected to a second pressing circular plate, and two limit columns are symmetrically fixedly connected to the outer wall of the outer wall of the propulsion round rod close to the second pressing circular plate; One end of the first spring is fixedly connected to a limited circular plate, a tension spring is fixedly connected to the bottom outer wall of the limit cylinder, one end of the tension spring is fixedly connected to a propulsion plate, a limited sliding groove is provided at the center position on the top outer wall of the propulsion plate, a plurality of straightening columns are symmetrically fixedly connected to the outer walls on both sides of the propulsion plate, and L-shaped connecting plates are symmetrically fixedly connected to the two sides of the top outer wall of the propulsion plate; A second spring is fixedly connected to the outer wall of the bottom of the two L-shaped connecting plates near the second sliding circular hole, and a second sliding circular hole is respectively opened on the outer wall of the two L-shaped connecting plates away from one end of the pushing plate, and a second sliding cylinder is slidably connected to the inner wall of the two second sliding circular holes, and one end of the two second sliding cylinders is fixedly connected to a U-shaped fixing plate, and the other ends of the two second sliding cylinders are fixedly connected to the same straightening base; An avoidance groove is provided in the middle of the straightening base, a plurality of straightening grooves are symmetrically provided on the inner walls on both sides of the avoidance groove, a plurality of limiting grooves distributed in a linear array are provided on the bottom outer wall of the straightening base, and two limiting elastic sheets are clamped and fixed on the outer walls near both ends of the straightening base.

2. The welding device for producing new energy vehicle circuit boards according to claim 1 is characterized in that: The positioning assembly includes a first connecting rod and a second connecting rod, and the two ends of the first connecting rod and the two ends of the second connecting rod are respectively fixedly connected to the outer walls of the two first connecting plates facing each other. A sliding plate is fixedly connected to the outer wall of one side of the positioning protrusion close to the mounting frame, and an L-shaped positioning plate is slidably connected to the outer wall of the sliding plate, and screws are threaded on the top outer wall of the L-shaped positioning plate.

3. The welding device for producing new energy vehicle circuit boards according to claim 2 is characterized in that: A positioning support plate is fixedly connected to the top outer wall of the second connecting rod, a second threaded hole is opened in the middle of the outer wall of the positioning support plate, a second threaded column is screwed on the inner wall of the second threaded hole, a second handle is fixedly connected to the end of the second threaded column away from the first connecting rod, an abutment block is rotatably connected to the end of the second threaded column close to the first connecting rod, and a first rotation groove is opened on the outer wall of the abutment block on one side close to the second threaded column.

4. The welding device for producing new energy vehicle circuit boards according to claim 1, characterized in that: One end of the third threaded column is fixedly connected to a third handle, and the other end of the third threaded column is rotatably connected to a sliding block. A second rotating groove is provided on an outer wall of the sliding block close to the third threaded column, and first sliding grooves are respectively provided on outer walls of both sides of the sliding block close to the two sliding columns. Two first sliding cylinders are fixedly connected to an outer wall of the sliding block close to the first connecting rod.

5. The welding device for producing new energy vehicle circuit boards according to claim 4 is characterized in that: A fourth threaded hole is provided on the outer wall of the sliding block on a side away from the first sliding cylinder, a fourth threaded column is screwed on the inner wall of the fourth threaded hole, an end of the fourth threaded column away from the first connecting rod is fixedly connected to a fourth handle, an end of the fourth threaded column close to the first connecting rod is rotatably connected to a limiting cylinder, and a third rotating groove and two first sliding holes are provided on the outer wall of the limiting cylinder close to the bottom.

6. The welding device for producing new energy vehicle circuit boards according to claim 1, characterized in that: The limiting elastic plate includes two first clamping plates, two second clamping plates, two third clamping plates, two fourth clamping plates, a fifth clamping plate and a sixth clamping plate. The outer wall of the first clamping plate is close to the top outer wall of the straightening base, and the outer wall of the third clamping plate is close to the bottom outer wall of the straightening base. The first clamping plate and the third clamping plate are respectively fixedly connected to the two ends of the second clamping plate, and the end of the third clamping plate away from the second clamping plate is fixedly connected to the fourth clamping plate, and the other end of the fourth clamping plate is fixedly connected to the fifth clamping plate, and the sixth clamping plate is fixedly connected to the outer wall of the fifth clamping plate on one side close to the central axis of the straightening base.

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