A circuit board welding jig

Abstract

The application discloses a circuit board welding jig and relates to the technical field of circuit board welding jigs. The application provides a circuit board welding jig, which comprises a base, a bearing part, a pressing assembly and a jacking assembly. The bearing part has a plurality of placement grooves arranged in a circumferential direction, and the placement grooves are used for placing circuit boards to be welded. The pressing assembly is arranged above the bearing part and has a tendency to move towards the bearing part. The jacking assembly is rotatably arranged on the base and can drive the bearing part to rotate in the circumferential direction, so that a target placement groove on the bearing part moves below the pressing assembly. During the movement of the target placement groove below the pressing assembly, the jacking assembly applies a driving force to the pressing assembly in a direction away from the bearing part. The jacking assembly can rotate relative to the bearing part to cancel the driving force, so that the pressing assembly can press the circuit board to be welded.

Description

Technical Field

[0001] This application relates to the field of circuit board welding fixture technology, and in particular to a circuit board welding fixture. Background Technology

[0002] After electronic components are mounted on a circuit board, wire soldering or manual resoldering of components is often required. These soldering processes necessitate the use of fixtures to position and clamp the circuit board. Existing circuit board soldering fixtures with rotating support structures typically place the circuit board in a slot within a support component, and then rotate the support component to sequentially move different slots to the soldering station. However, in these fixtures, the rotation of the support component and the clamping action of the clamping assembly are usually performed by two separate drive mechanisms, or the operator must manually operate the rotation and clamping steps separately, resulting in inconsistent process flow and affecting the overall efficiency of the soldering operation. Furthermore, some fixtures require additional driving force from the clamping assembly after the slot has rotated to below it to press down and clamp the circuit board. During this process, the clamping assembly may interfere with the support component or the circuit board, preventing the slot from moving smoothly under the clamping assembly, or causing the clamping assembly to impact the circuit board during pressing, affecting positioning accuracy. Summary of the Invention

[0003] The main objective of this application is to provide a circuit board welding fixture that addresses the technical problem in existing circuit board welding fixtures with rotating load-bearing structures where the rotational action of the load-bearing structure and the clamping action of the clamping structure are not sufficiently coordinated, resulting in low process connection efficiency.

[0004] To achieve the above objectives, this application provides a circuit board soldering fixture, comprising: Base; A carrier component is rotatably mounted on the base. The carrier component has a plurality of circumferentially arranged placement slots for placing circuit boards to be soldered. A clamping assembly is disposed above the support member, and the clamping assembly has a tendency to move toward the support member; A lifting assembly, rotatably mounted on the base, is capable of driving the carrier to rotate circumferentially, so that the target placement slot on the carrier moves below the clamping assembly. During the movement of the target placement slot below the clamping assembly, the lifting assembly applies a driving force to the clamping assembly in a direction away from the carrier. The lifting assembly is also capable of rotating relative to the carrier to remove the driving force, thereby clamping the circuit board to be soldered.

[0005] Optionally, each of the placement slots has a through clearance hole at its bottom, and at least one positioning post is provided around the periphery of the clearance hole in the placement slot. The positioning post is used to cooperate with the positioning hole on the circuit board to be soldered.

[0006] Optionally, the bearing member has a through hole in the middle, a support member is disposed in the through hole, and the clamping assembly is disposed on the support member.

[0007] Optionally, the clamping assembly includes a fixed plate, a first lifting block, a guide rod, a compression spring, and a clamping unit; the fixed plate is connected to the support member, the first lifting block is disposed below the fixed plate and is used to cooperate with the lifting assembly, one end of the guide rod is connected to the first lifting block and the other end passes through the fixed plate, the compression spring is sleeved on the guide rod and located between the first lifting block and the fixed plate, the clamping unit is connected to the first lifting block, and the projection area of ​​the clamping unit in the direction of the support member is located at the edge of the circuit board to be soldered.

[0008] Optionally, the first lifting block has a mounting hole extending radially along the through hole of the bearing member, and a limiting strip is provided in the mounting hole along its extending direction. The clamping unit is connected to the first lifting block through a connecting rod, the connecting rod passing through the mounting hole, the outer wall of the connecting rod having a limiting groove for cooperating with the limiting strip, and the outer wall of the connecting rod being threaded with limiting nuts located on both sides of the first lifting block.

[0009] Optionally, the clamping unit includes a clamping plate and clamping rods, with threaded holes through both ends of the clamping plate, and the two clamping rods threadedly engaging with the threaded holes.

[0010] Optionally, the lifting assembly includes a rotating cylinder and a second lifting block. The rotating cylinder is disposed within the through hole. At least one second lifting block is arranged circumferentially at the upper end of the rotating cylinder. The second lifting block includes a placement section and a guide section. The placement section protrudes from the upper end face of the rotating cylinder. Two guide sections are obliquely disposed on both sides of the placement section to connect the placement section with the upper end face of the rotating cylinder. The lower end of the first lifting block is provided with an arc-shaped protrusion so that it can move along the guide section to the placement section and the upper end face of the rotating cylinder. A blocking unit is provided between the rotating cylinder and the carrier. When the first lifting block moves to the placement section of the second lifting block, the blocking unit causes the rotating cylinder and the carrier to form a circumferentially movable limiting structure.

[0011] Optionally, an annular accommodating space is formed between the rotating cylinder and the carrier, and at least one of the blocking units is arranged circumferentially within the accommodating space. The blocking unit includes a first block, a second block, a guide post, and a guide sleeve. The first block is connected to the outer wall of the rotating cylinder, the second block is connected to the inner wall of the carrier, the first end of the guide post is connected to the first block, the first end of the guide sleeve is connected to the second block, and the second end of the guide sleeve is sleeved on the second end of the guide post. The guide post can move relative to the guide post along the extension direction of the guide sleeve.

[0012] Optionally, the inner wall of the rotating cylinder is provided with a toothed ring extending in the circumferential direction, the base is provided with a drive motor, and the output shaft of the drive motor is fitted with a gear that meshes with the toothed ring.

[0013] Optionally, the support member includes a support plate and a support cylinder. The upper end of the support plate and the support cylinder are connected to each other. The upper end of the base is provided with a positioning ring. The positioning ring has a first slot and a second slot arranged circumferentially. The first slot cooperates with the support cylinder. A first ball is filled circumferentially between the bottom wall of the first slot and the lower end of the support cylinder. The second slot is used to cooperate with the rotating cylinder. A second ball is filled circumferentially between the bottom wall of the second slot and the lower end of the rotating cylinder.

[0014] The beneficial effects that this application can achieve are: This application discloses a circuit board welding fixture. A carrier is rotatably mounted on a base and has multiple circumferentially arranged placement slots, capable of simultaneously accommodating multiple circuit boards to be welded. Rotation of the carrier allows for sequential switching between different placement slots, enabling continuous welding operations at multiple stations in a single setup. This reduces the time spent on repeated clamping and disassembly of circuit boards, improving the continuity and overall efficiency of the welding operation. A clamping assembly is positioned above the carrier and tends to move towards it. This pre-clamping tendency allows the clamping assembly to automatically move towards the carrier to clamp the circuit boards after the lifting assembly releases its driving force, eliminating the need for a separate clamping drive source and simplifying the overall structure of the fixture. The lifting assembly is rotatably mounted on the base. It drives the carrier to rotate circumferentially, moving the target placement slot below the clamping assembly. During this movement, the lifting assembly simultaneously applies a driving force to the clamping assembly, moving it away from the carrier. This ensures that the rotation of the carrier and the lifting of the clamping assembly are coordinated by the same lifting assembly, occurring synchronously. This avoids the delay caused by rotating the carrier first and then lifting the clamping assembly separately, resulting in a more streamlined process. The lifting assembly can rotate relative to the carrier to release the driving force, allowing the clamping assembly to move towards the carrier under its own pre-clamping tendency to clamp the circuit board to be soldered. This release is automatically triggered after the placement slot is in place, completing the transition from lifting to clamping without additional operation. This prevents interference between the clamping assembly and the carrier or circuit board during placement, ensuring smooth placement and improving circuit board positioning accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the fixture according to an embodiment of this application; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic front cross-sectional view of the fixture according to an embodiment of this application; Figure 4 This is a schematic diagram of the clamping unit according to an embodiment of this application; Figure 5 for Figure 1 Schematic diagram of the structure behind the hidden support plate; Figure 6 for Figure 5 A top-view cross-sectional structural diagram; Figure 7 for Figure 5 A schematic diagram of the main structure.

[0016] The numbers on the map are: 10-Base, 11-Positioning ring, 12-First ball bearing, 13-Second ball bearing, 20-Bearing component, 21-Bearing cylinder, 211-Placement groove, 212-Leaving hole, 213-Positioning post, 22-Bearing plate, 30-Supporting component, 40-Pressure assembly, 41-Fixing plate, 42-First lifting block, 43-Compression spring, 44-Guide rod, 45-Pressure unit, 451-Limit nut, 452-Connecting rod, 453-Pressure plate, 454-Pressure rod, 50-Limit groove, 60-Lifting assembly, 61-Rotating cylinder, 62-Second lifting block, 621-Placement section, 622-Guide section, 70-Blocking unit, 71-First stop, 72-Second stop, 73-Guide post, 74-Guide sleeve, 80-Gear ring, 81-Gear, 82-Drive motor, 90-Circuit board.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Example 1 Reference Figures 1-7 The first embodiment of this application provides a circuit board 90 soldering fixture, comprising: Base 10; The support member 20 is rotatably mounted on the base 10. The support member 20 has a plurality of placement slots 211 arranged in a circumferential direction. The placement slots 211 are used to place the circuit board 90 to be soldered. The clamping assembly 40 is disposed above the support member 20, and the clamping assembly 40 has a tendency to move toward the support member 20; The lifting assembly 60 is rotatably mounted on the base 10. The lifting assembly 60 can drive the carrier 20 to rotate circumferentially so that the target placement slot 211 on the carrier 20 moves below the clamping assembly 40. During the process of the target placement slot 211 moving below the clamping assembly 40, the lifting assembly 60 applies a driving force to the clamping assembly 40 in a direction away from the carrier 20. The lifting assembly 60 can rotate relative to the carrier 20 to remove the driving force so that the clamping assembly 40 clamps the circuit board 90 to be soldered.

[0023] In this embodiment, the base 10 serves as the overall support foundation, and the carrier 20 is rotatably mounted above the base 10. The carrier 20 has multiple placement slots 211 arranged circumferentially on it. These slots accommodate the circuit board 90 to be soldered and initially define the horizontal position of the circuit board 90. A clamping assembly 40 is positioned above the carrier 20. This clamping assembly 40 includes a fixing plate 41, a first lifting block 42 movably disposed below the fixing plate 41, and a clamping unit 45 for direct contact with the circuit board 90. The fixing plate 41 is supported above the carrier 20 by a support member 30, which remains fixed relative to the carrier 20. A compression spring 43 is disposed between the first lifting block 42 and the fixing plate 41. The compression spring 43 continuously applies an elastic thrust to the first lifting block 42 toward the carrier 20, thereby causing the clamping unit 45 to tend to move closer to the carrier 20. The lifting assembly 60 includes a rotating cylinder 61 rotatably mounted on the base 10 and a second lifting block 62 fixed to the upper end of the rotating cylinder 61. The second lifting block 62 has a protruding placement section 621 and guide sections 622 located on both sides of the placement section 621 and inclined transition. A blocking unit 70 is provided between the carrier 20 and the rotating cylinder 61. The blocking unit 70 can restrict the relative rotation between the rotating cylinder 61 and the carrier 20 when the rotating cylinder 61 rotates relative to the carrier 20 to a specific angle, thereby enabling the rotating cylinder 61 to drive the carrier 20 to rotate synchronously.

[0024] In actual operation, the circuit board 90 welding fixture first requires the operator to place multiple circuit boards 90 to be welded into the respective placement slots 211 on the carrier 20. The circuit boards 90 are initially positioned horizontally within the placement slots 211. Then, the rotating cylinder 61 is driven to rotate relative to the base 10. During the initial stage of the rotating cylinder 61's rotation, the blocking unit 70 is in a limited position. The rotating cylinder 61 transmits the rotational driving force to the carrier 20 through the blocking unit 70, causing the carrier 20 and the rotating cylinder 61 to rotate synchronously in the circumferential direction. The multiple placement slots 211 on the carrier 20 then change position sequentially, thereby moving the target placement slot 211 directly below the pressing assembly 40. Throughout the entire process of the target placement slot 211 moving directly below the pressing assembly 40, the first lifting block 42 of the pressing assembly 40 remains in contact with the second lifting block 62 at the upper end of the rotating cylinder 61. Because the lower end of the first lifting block 42 has an arc-shaped protrusion, when the rotating cylinder 61 drives the second lifting block 62 to rotate, the arc-shaped protrusion first contacts the guide section 622 of the second lifting block 62 located at the lower position. As the rotating cylinder 61 continues to rotate, the arc-shaped protrusion gradually rises along the inclined surface of the guide section 622 to the upper surface of the placement section 621 of the protrusion. In this process, the second lifting block 62 converts the circumferential rotation of the rotating cylinder 61 into the vertical lifting motion of the first lifting block 42. The first lifting block 42 drives the entire pressing unit 45 to move away from the carrier 20 against the elastic force of the compression spring 43, thereby forming sufficient clearance space on the path of the target placement groove 211 into the pressing assembly 40, avoiding contact and interference between the pressing unit 45 and the carrier 20 or the circuit board 90. When the target placement slot 211 is completely below the clamping assembly 40, the arc-shaped protrusion of the first lifting block 42 is exactly located on the upper surface of the placement section 621 of the second lifting block 62. At this time, the target placement slot 211 is in place, and the clamping unit 45 is raised to its highest position. It should be noted that when the arc-shaped protrusion of the first lifting block 42 is located on the upper surface of the placement section 621 of the second lifting block 62, the target placement slot 211 may not be in place. The first lifting block 42 can move a certain distance along the placement section 621 of the second lifting block 62 before the target placement slot 211 is moved into place, which can also meet the requirements. After that, the rotating cylinder 61 continues to move backward a certain distance relative to the carrier 20. The blocking unit 70 is released from its limiting state at this angle, and the rotating cylinder 61 rotates relative to the carrier 20, so that the arc-shaped protrusion of the first lifting block 42 falls from the upper surface of the placement section 621 of the second lifting block 62 through the guide section 622 on the other side into the upper end face of the rotating cylinder 61.At this instant, the lifting driving force of the second lifting block 62 on the first lifting block 42 is removed, the elastic force stored in the compression spring 43 is released, and the compression spring 43 drives the first lifting block 42 to move the clamping unit 45 quickly toward the bearing 20 until the clamping unit 45 contacts and clamps the edge area of ​​the circuit board 90 to be welded in the placement groove 211, completing the positioning and clamping operation before welding.

[0025] Since the rotational driving force of the carrier 20 and the lifting driving force of the clamping assembly 40 both originate from the rotational movement of the same lifting assembly 60, the process of the target placement slot 211 on the carrier 20 moving downwards towards the clamping assembly 40 and the process of the clamping unit 45 moving upwards to avoid it are synchronized in time. The two actions share the same driving force source, reducing the structural complexity and cost of setting up a separate clamping driving mechanism, and also helping to shorten the transition time between the station switching and the clamping operation in the welding process. Throughout the entire path of the target placement slot 211 moving into the clamping assembly 40, the clamping unit 45 is always in a lifted and avoiding state until the placement slot 211 is fully in place before the lifting force is removed and clamping is performed. This sequential relationship can reduce the scratching or collision caused by the clamping unit 45 to the surface of the circuit board 90 in the placement slot 211 during the movement process, and help maintain the initial positioning state of the circuit board 90 in the placement slot 211 without displacement. After the placement slot 211 is in place, the lifting component 60 only needs to rotate a small angle to automatically cancel the lifting effect on the clamping component 40. The clamping action is completed entirely by the elastic force of the compression spring 43. There is no need for additional solenoid valves, cylinders or motors to control the pressing process of the clamping unit 45. This reduces the fixture's dependence on external power sources such as air or electricity, and also reduces the control links of the clamping action. This helps to improve the response speed and reliability of the clamping action, so that the circuit board 90 can obtain a stable and consistent clamping force during the soldering process.

[0026] Example 2 Based on Example 1, this example provides a circuit board 90 soldering fixture, such as... Figure 1 As shown, each placement slot 211 has a through clearance hole 212 at its bottom, and at least one positioning post 213 is provided around the clearance hole 212 in the placement slot 211. The positioning post 213 is used to cooperate with the positioning hole on the circuit board 90 to be soldered.

[0027] Specifically, a through clearance hole 212 is provided at the bottom of the placement slot 211, allowing the soldering pins of the circuit board 90 to be soldered or the solder joints of the mounted components to pass through the clearance hole 212. This prevents the bottom wall of the placement slot 211 from directly contacting and pressing the soldering area on the back of the circuit board 90, thus providing clearance space for the solder joints on the back of the circuit board 90. At least one positioning post 213 is provided around the clearance hole 212. The positioning post 213 is used to cooperate with the positioning hole on the circuit board 90 to be soldered. When the operator places the circuit board 90 into the placement slot 211, the positioning post 213 inserts into the positioning hole of the circuit board 90, thereby defining the position of the circuit board 90 relative to the placement slot 211 in the horizontal direction. When the clamping assembly 40 presses down, the circuit board 90 will not slide horizontally in the placement slot 211, which helps to maintain the alignment between the solder pads of the circuit board 90 and the soldering tool. Meanwhile, the clearance hole 212 provides clearance space for the solder joints on the back of the circuit board 90, reducing the occurrence of soldered components falling off or solder joints cracking due to pressure on the back of the circuit board 90 during the soldering process, which helps to improve the soldering yield.

[0028] Optionally, a through hole is provided in the middle of the bearing member 20, and a support member 30 is provided in the through hole, with the clamping assembly 40 disposed on the support member 30.

[0029] Specifically, a through hole is provided in the middle of the carrier 20, and a support 30 is installed in the through hole. The clamping assembly 40 is disposed on the support 30. Since the support 30 is located inside the through hole in the middle of the carrier 20 and is set independently relative to the carrier 20, the support 30 makes full use of the space in the middle of the carrier 20, keeping the surrounding area above the carrier 20 open, which is beneficial for operators to pick up and put down the circuit board 90 or to perform soldering operations.

[0030] Optionally, such as Figure 2 As shown, the clamping assembly 40 includes a fixed plate 41, a first lifting block 42, a guide rod 44, a compression spring 43, and a clamping unit 45. The fixed plate 41 is connected to the support member 30. The first lifting block 42 is located below the fixed plate 41 and is used to cooperate with the lifting assembly 60. One end of the guide rod 44 is connected to the first lifting block 42, and the other end passes through the fixed plate 41. The compression spring 43 is sleeved on the guide rod 44 and located between the first lifting block 42 and the fixed plate 41. The clamping unit 45 is connected to the first lifting block 42. The projection area of ​​the clamping unit 45 in the direction of the support member 20 is located at the edge of the circuit board 90 to be soldered.

[0031] Specifically, the fixing plate 41 in the clamping assembly 40 is fixedly connected to the support member 30, providing an installation reference for the clamping assembly 40. The first lifting block 42 is disposed below the fixing plate 41 and cooperates with the lifting assembly 60 to receive the lifting driving force from the lifting assembly 60. One end of the guide rod 44 is connected to the first lifting block 42, and the other end passes through the fixing plate 41. When the first lifting block 42 rises or falls under the action of the lifting assembly 60, the guide rod 44 moves accordingly and is constrained by the guide hole on the fixing plate 41, thereby ensuring that the first lifting block 42 can only reciprocate in the vertical direction, reducing the skewness of the first lifting block 42 during the lifting process. The compression spring 43 is sleeved on the guide rod 44 and located between the first lifting block 42 and the fixing plate 41. The guide rod 44 passes through the interior of the compression spring 43, constraining the radial deformation of the compression spring 43 during compression and release, so that the spring force always acts in the vertical direction. The clamping unit 45 is connected to the first lifting block 42 and moves up and down synchronously with the first lifting block 42. The projection area of ​​the clamping unit 45 in the direction of the carrier 20 is located at the edge of the circuit board 90 to be soldered. When the clamping unit 45 moves downward, it contacts the process edge or non-wiring area of ​​the edge of the circuit board 90, rather than the dense component area in the center of the circuit board 90. This helps to avoid the clamping force acting directly on the surface of the mounted components, reducing the risk of component damage from pressure. At the same time, it keeps the area above the soldering area in the center of the circuit board 90 open, making it easy for soldering tools to operate.

[0032] Optionally, such as Figure 3 and Figure 4 As shown, the first lifting block 42 has a mounting hole extending radially along the through hole of the bearing member 20. A limiting strip is provided in the mounting hole along its extension direction. The clamping unit 45 is connected to the first lifting block 42 through a connecting rod 452. The connecting rod 452 passes through the mounting hole. The outer wall of the connecting rod 452 has a limiting groove 50 for cooperating with the limiting strip. The outer wall of the connecting rod 452 is threaded with limiting nuts 451 located on both sides of the first lifting block 42.

[0033] Specifically, the first lifting block 42 is provided with a mounting hole extending radially along the through hole of the bearing member 20, and a limit strip is provided in the mounting hole along its extension direction. The clamping unit 45 is connected to the first lifting block 42 through a connecting rod 452, which passes through the mounting hole, and a limit groove 50 is formed on the outer wall of the connecting rod 452. The limit groove 50 cooperates with the limit strip in the mounting hole. When the connecting rod 452 moves radially in the mounting hole, the limit strip is engaged in the limit groove 50, thereby restricting the connecting rod 452 from rotating around its own axis, so that the clamping unit 45 always maintains the predetermined orientation and does not deflect. Two limiting nuts 451 are threaded onto the outer wall of the connecting rod 452. The two limiting nuts 451 are located on both sides of the first lifting block 42. By screwing these two limiting nuts 451, the operator can adjust the radial extension length of the connecting rod 452 relative to the first lifting block 42. When it is necessary to press circuit boards 90 of different sizes, the radial position of the connecting rod 452 can be adjusted to ensure that the pressing unit 45 is always aligned with the edge area of ​​the circuit board 90, thereby increasing the adaptability of the fixture to circuit boards 90 of different specifications. At the same time, the cooperation between the limiting strip and the limiting groove 50 also reduces the possibility of the pressing unit 45 deflecting at an angle due to force during operation, which is conducive to maintaining the stability of the pressing posture.

[0034] Optionally, such as Figure 3 and Figure 4 As shown, the clamping unit 45 includes a clamping plate 453 and clamping rods 454. Threaded holes are provided at both ends of the clamping plate 453, and the two clamping rods 454 are threadedly engaged with the threaded holes.

[0035] Specifically, threaded holes are provided at both ends of the clamping plate 453, and two clamping rods 454 are threaded into the threaded holes at both ends of the clamping plate 453. By turning the clamping rods 454, the length of the clamping rods 454 extending downward relative to the clamping plate 453 can be changed. When there are local unevenness on the surface of the circuit board 90 or slight differences in the thickness of the circuit board 90 in different areas, the operator can adjust the extension length of the two clamping rods 454 respectively, so that the lower ends of the two clamping rods 454 can contact and press the surface of the circuit board 90, thereby providing a balanced clamping force and avoiding excessive force at a single point or local lack of clamping due to unevenness of the circuit board 90 surface. At the same time, after the threaded clamping rods 454 are adjusted to the correct position, they remain in place due to the self-locking property of the threads, reducing the possibility of the clamping rods 454 loosening and retracting during the welding process due to vibration or external interference, which is conducive to maintaining the long-term stability of the clamping force.

[0036] Optionally, such as Figure 5As shown, the lifting assembly 60 includes a rotating cylinder 61 and a second lifting block 62. The rotating cylinder 61 is disposed in a through hole. At least one second lifting block 62 is arranged circumferentially on the upper end of the rotating cylinder 61. The second lifting block 62 includes a placement section 621 and a guide section 622. The placement section 621 protrudes from the upper end face of the rotating cylinder 61. Two guide sections 622 are inclinedly disposed on both sides of the placement section 621 to connect the placement section 621 with the upper end face of the rotating cylinder 61. The lower end of the first lifting block 42 is provided with an arc-shaped protrusion so that it can move along the guide section 622 to the upper end face of the placement section 621 and the rotating cylinder 61. A blocking unit 70 is provided between the rotating cylinder 61 and the carrier 20. When the first lifting block 42 moves to the placement section 621 of the second lifting block 62, the blocking unit 70 makes the rotating cylinder 61 and the carrier 20 form a circumferentially movable limiting structure.

[0037] Specifically, the rotating cylinder 61 in the lifting assembly 60 is disposed within a through hole in the middle of the support member 20, and at least one second lifting block 62 is circumferentially arranged and fixed to the upper end of the rotating cylinder 61. The second lifting block 62 includes a placement section 621 and a guide section 622, wherein the placement section 621 protrudes from the upper end face of the rotating cylinder 61, and the two guide sections 622 are respectively inclinedly disposed on both sides of the placement section 621 for smoothly connecting the placement section 621 and the upper end face of the rotating cylinder 61. The lower end of the first lifting block 42 is provided with an arc-shaped protrusion, which can move along the inclined surface of the guide section 622 to the upper surface of the placement section 621 or to the upper end face of the rotating cylinder 61. The inclined surface of the guide section 622 allows the arc-shaped protrusion to smoothly transition during the climbing and descending process, reducing impact and jamming. A blocking unit 70 is also provided between the rotating cylinder 61 and the carrier 20. When the arc-shaped protrusion moves to the placement section 621 of the second lifting block 62, the blocking unit 70 makes the rotating cylinder 61 and the carrier 20 form a circumferential movement limiting structure. At this time, the rotating cylinder 61 and the carrier 20 remain relatively fixed and rotate synchronously, ensuring that the target placement groove 211 reaches exactly below the pressing assembly 40 when the arc-shaped protrusion is at its highest position. This cam-type engagement structure converts the circumferential rotation of the rotating cylinder 61 into the vertical lifting motion of the first lifting block 42. The conversion process is continuous and smooth, which helps to extend the service life of the contact surface. At the same time, the blocking unit 70 provides a limiting effect when the arc-shaped protrusion is in the placement section 621, which helps to ensure the synchronization of the two actions of the placement groove 211 being in place and the pressing assembly 40 being raised to its highest point.

[0038] Optionally, such as Figure 6As shown, an annular accommodating space is formed between the rotating cylinder 61 and the carrier 20. At least one blocking unit 70 is arranged circumferentially within the accommodating space. The blocking unit 70 includes a first stop 71, a second stop 72, a guide post 73, and a guide sleeve 74. The first stop 71 is connected to the outer wall of the rotating cylinder 61, the second stop 72 is connected to the inner wall of the carrier 20, the first end of the guide post 73 is connected to the first stop 71, the first end of the guide sleeve 74 is connected to the second stop 72, and the second end of the guide sleeve 74 is sleeved on the second end of the guide post 73. The guide post 73 can move relative to the guide sleeve 74 along its extension direction.

[0039] Specifically, an annular accommodating space is formed between the rotating cylinder 61 and the carrier 20, and at least one blocking unit 70 is arranged circumferentially within this accommodating space. This arrangement utilizes the gap area between the rotating cylinder 61 and the carrier 20, reducing the space occupied by the blocking unit 70 on the external space of the fixture. Each blocking unit 70 includes a first stop 71, a second stop 72, a guide post 73, and a guide sleeve 74. The first stop 71 is fixedly connected to the outer wall of the rotating cylinder 61, the second stop 72 is fixedly connected to the inner wall of the carrier 20, the first end of the guide post 73 is fixed to the first stop 71, the first end of the guide sleeve 74 is fixed to the second stop 72, and the second end of the guide sleeve 74 is sleeved on the second end of the guide post 73. The guide post 73 can move relative to the guide sleeve 74 along the extension direction of the guide sleeve 74. When the rotating cylinder 61 rotates relative to the carrier 20, the relative movement between the first stop 71 and the second stop 72 is constrained by the sliding fit between the guide post 73 and the guide sleeve 74. These two elements form a limiting relationship with a specific free travel in the circumferential direction. That is, the rotating cylinder 61 can rotate a certain angle relative to the carrier 20 within the fit length of the guide sleeve 74 and the guide post 73. Beyond this range, the first stop 71 and the second stop 72 form a rigid contact, and they rotate synchronously. This structure eliminates the need for control elements such as solenoid valves or clutches, relying solely on the mechanical structure to automatically establish and release limits between the rotating cylinder 61 and the carrier 20 at specific angles. This improves operational reliability. Furthermore, the evenly distributed circumferential arrangement of multiple blocking units 70 helps reduce the eccentric load between the rotating cylinder 61 and the carrier 20, making their relative rotation smoother.

[0040] Optionally, such as Figure 5 As shown, the inner wall of the rotating cylinder 61 is provided with a toothed ring 80 extending in the circumferential direction, and the base 10 is provided with a drive motor 82. The output shaft of the drive motor 82 is fitted with a gear 81 that meshes with the toothed ring 80.

[0041] Specifically, the inner wall of the rotating cylinder 61 is provided with a circumferentially extending toothed ring 80, and a drive motor 82 is provided on the base 10. A gear 81 that meshes with the toothed ring 80 is sleeved on the output shaft of the drive motor 82. After the drive motor 82 is started, the motor output shaft drives the gear 81 to rotate. The gear 81 transmits the driving force to the rotating cylinder 61 through meshing with the toothed ring 80, so that the rotating cylinder 61 obtains rotational driving force. The toothed ring 80 is located on the inner wall of the rotating cylinder 61, so that the transmission structure is located inside the rotating cylinder 61, reducing the space occupied by the external transmission mechanism around the fixture, and helping to avoid accidental contact of the transmission components by operators or welding tools when moving outside the fixture. At the same time, the meshing transmission method of the gear 81 and the toothed ring 80 can provide stable speed and torque output, which helps to ensure the uniformity of the rotation speed of the bearing 20 and reduce the displacement of the circuit board 90 in the placement slot 211 due to sudden speed changes. The rotating cylinder 61 can be driven to rotate clockwise and counterclockwise by the forward and reverse rotation of the drive motor 82.

[0042] Optionally, such as Figure 1 , Figure 3 As shown, the support member 20 includes a support plate 22 and a support cylinder 21. The upper ends of the support plate 22 and the support cylinder 21 are connected to each other. The upper end of the base 10 is provided with a positioning ring 11. The positioning ring 11 has a first slot and a second slot arranged in the circumferential direction. The first slot cooperates with the support cylinder 21. The bottom wall of the first slot and the lower end of the support cylinder 21 are filled with a first ball 12 in the circumferential direction. The second slot is used to cooperate with the rotating cylinder 61. The bottom wall of the second slot and the lower end of the rotating cylinder 61 are filled with a second ball 13 in the circumferential direction.

[0043] Specifically, the support component 20 includes a support plate 22 and a support cylinder 21. The upper ends of the support plate 22 and the support cylinder 21 are fixedly connected to each other. The upper surface of the support plate 22 is used to form a placement groove 211. The support cylinder 21 serves as a supporting rotating body below the support plate 22. A positioning ring 11 is provided at the upper end of the base 10. The positioning ring 11 has a first groove and a second groove arranged circumferentially. The first groove cooperates with the lower end of the support cylinder 21 to limit the rotation trajectory of the support cylinder 21 on the base 10. The second groove is used to cooperate with the lower end of the rotating cylinder 61 to limit the rotation trajectory of the rotating cylinder 61 on the base 10. A plurality of first balls 12 are circumferentially filled between the bottom wall of the first groove and the lower end of the support cylinder 21. When the support cylinder 21 rotates relative to the base 10, the first balls 12 roll between the lower end face of the support cylinder 21 and the bottom wall of the first groove, converting sliding friction into rolling friction and reducing the frictional resistance when the support cylinder 21 rotates. Multiple second ball bearings 13 are circumferentially filled between the bottom wall of the second slot and the lower end of the rotating cylinder 61. When the rotating cylinder 61 rotates relative to the base 10, the second ball bearings 13 also reduce the frictional resistance between the lower end face of the rotating cylinder 61 and the bottom wall of the second slot. Through the coaxial arrangement of the first and second slots, the carrier 20 and the rotating cylinder 61 obtain a common axis of rotation on the base 10, which helps ensure that they remain coaxial during rotation and reduces swaying and jamming caused by misalignment. At the same time, the first ball bearings 12 and the second ball bearings 13, while reducing frictional resistance, also provide axial support, enabling the carrier 20 and the rotating cylinder 61 to obtain stable support from the base 10 when subjected to the downward pressure transmitted by the clamping assembly 40, while maintaining easy and flexible rotation. Furthermore, the bearing cylinder 21 and the first slot are interference fit, and the rotating cylinder 61 and the second slot are clearance fit. This means that when the rotating cylinder 61 is driven to rotate by the gear 81 and the gear ring 80, the bearing cylinder 21 needs to overcome a certain external force to rotate with the rotating cylinder 61, so as to avoid the situation where the bearing cylinder 21 moves arbitrarily when it is not needed.

[0044] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A circuit board welding fixture, characterized in that, include: Base; A carrier component is rotatably mounted on the base. The carrier component has a plurality of circumferentially arranged placement slots for placing circuit boards to be soldered. A clamping assembly is disposed above the support member, and the clamping assembly has a tendency to move toward the support member; A lifting assembly, rotatably mounted on the base, is capable of driving the carrier to rotate circumferentially, so that the target placement slot on the carrier moves below the clamping assembly. During the movement of the target placement slot below the clamping assembly, the lifting assembly applies a driving force to the clamping assembly in a direction away from the carrier. The lifting assembly is also capable of rotating relative to the carrier to remove the driving force, thereby clamping the circuit board to be soldered.

2. The circuit board welding fixture as described in claim 1, characterized in that, Each of the placement slots has a through clearance hole at its bottom, and at least one positioning post is provided around the periphery of the clearance hole in the placement slot. The positioning post is used to mate with the positioning hole on the circuit board to be soldered.

3. The circuit board welding fixture as described in claim 1, characterized in that, The bearing member has a through hole in the middle, and a support member is provided in the through hole. The clamping assembly is disposed on the support member.

4. The circuit board welding fixture as described in claim 3, characterized in that, The clamping assembly includes a fixed plate, a first lifting block, a guide rod, a compression spring, and a clamping unit. The fixed plate is connected to the support member. The first lifting block is located below the fixed plate and is used to cooperate with the lifting assembly. One end of the guide rod is connected to the first lifting block, and the other end passes through the fixed plate. The compression spring is sleeved on the guide rod and located between the first lifting block and the fixed plate. The clamping unit is connected to the first lifting block, and the projection area of ​​the clamping unit in the direction of the support member is located at the edge of the circuit board to be soldered.

5. The circuit board welding fixture as described in claim 4, characterized in that, The first lifting block has a mounting hole extending radially along the through hole of the bearing member. A limiting strip is provided in the mounting hole and is arranged along its extension direction. The clamping unit is connected to the first lifting block through a connecting rod. The connecting rod passes through the mounting hole. The outer wall of the connecting rod has a limiting groove for cooperating with the limiting strip. The outer wall of the connecting rod is threaded with limiting nuts located on both sides of the first lifting block.

6. The circuit board welding fixture as described in claim 4, characterized in that, The clamping unit includes a clamping plate and clamping rods. The clamping plate has threaded holes through both ends, and the two clamping rods are threaded into the threaded holes.

7. The circuit board welding fixture as described in claim 4, characterized in that, The lifting assembly includes a rotating cylinder and a second lifting block. The rotating cylinder is disposed within the through hole. At least one second lifting block is arranged circumferentially on the upper end of the rotating cylinder. The second lifting block includes a placement section and a guide section. The placement section protrudes from the upper end face of the rotating cylinder. Two guide sections are obliquely disposed on both sides of the placement section to connect the placement section with the upper end face of the rotating cylinder. The lower end of the first lifting block is provided with an arc-shaped protrusion so that it can move along the guide section to the placement section and the upper end face of the rotating cylinder. A blocking unit is provided between the rotating cylinder and the support member. When the first lifting block moves to the placement section of the second lifting block, the blocking unit causes the rotating cylinder and the support member to form a circumferentially movable limiting structure.

8. The circuit board welding fixture as described in claim 7, characterized in that, An annular accommodating space is formed between the rotating cylinder and the carrier. At least one blocking unit is arranged circumferentially within the accommodating space. The blocking unit includes a first block, a second block, a guide post, and a guide sleeve. The first block is connected to the outer wall of the rotating cylinder, the second block is connected to the inner wall of the carrier, the first end of the guide post is connected to the first block, the first end of the guide sleeve is connected to the second block, and the second end of the guide sleeve is sleeved on the second end of the guide post. The guide post can move relative to the guide post along the extension direction of the guide sleeve.

9. The circuit board welding fixture as described in claim 8, characterized in that, The inner wall of the rotating cylinder is provided with a toothed ring extending in the circumferential direction, and a drive motor is provided on the base. A gear that meshes with the toothed ring is sleeved on the output shaft of the drive motor.

10. The circuit board welding fixture as described in claim 7, characterized in that, The support component includes a support plate and a support cylinder. The upper end of the support plate is connected to the upper end of the support cylinder. A positioning ring is provided at the upper end of the base. The positioning ring has a first slot and a second slot arranged circumferentially. The first slot cooperates with the support cylinder. A first ball is circumferentially filled between the bottom wall of the first slot and the lower end of the support cylinder. The second slot is used to cooperate with the rotating cylinder. A second ball is circumferentially filled between the bottom wall of the second slot and the lower end of the rotating cylinder.

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