A nut welding piece with high anti-rotational torque for a PCB board and a welding structure

Abstract

The utility model provides a high anti -rotation torque nut welding spare and welding structure for PCB, including welding nut, welding nut is set up in the step -like shape, one end is big diameter end, the other end is small diameter end, sheet metal spare is installed on small diameter end, the bottom of sheet metal spare and big diameter end close small diameter end end face close -fit arrangement, the periphery of sheet metal spare is circumferential horizontal extension to big diameter end, the one side opening of insulating sleeve, the other end is closed, forms the cavity containing welding nut inside, insulating sleeve sets up and assembles on big diameter end from big diameter end side of welding nut, the utility model discloses utilize the stamping piece of sheet metal spare as main welding surface, has increased the welding contact area with PCB, has improved the anti -rotation torque, prevents the loosening, in addition because of increasing welding plane, reduces the welding time, effectively prevents the situation that tinning layer is dissolved to PCB hole after welding, the firm buckle connection of annular clamping slot of nut is formed with the positioning ring in the inside of insulating sleeve, and the short circuit risk is prevented.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to the field of axial adjustment components, specifically a nut welding component and welding structure with high resistance to rotational torque for PCB boards. Background Technology

[0002] On PCBs, SMT nuts are often used to connect to other components. However, the existing connection methods for SMT nuts are mostly soldering, and there is only one nut body during soldering.

[0003] However, in practical applications, the small contact area between the SMT nut body and the PCB board results in poor welding bonding. In existing structures, the welding area is only at the step of the nut. However, in order to ensure the reliability of the nut welding in the limited welding area, the welding time and thickness are often increased. After the SMT nut is welded to the PCB board, the outer tin plating layer dissolves into the holes of the PCB board and accumulates, resulting in a smaller anti-rotation torque of the SMT nut after welding.

[0004] Furthermore, the exposed metal parts of the SMT nuts after soldering are directly exposed and cannot achieve insulation, posing a problem of electrical connection and causing electrical short circuits. To solve this problem, the current practice is to perform additional insulating potting, which fills other areas of the PCB board with glue. However, this process is complex, costly, and requires additional barriers to prevent glue overflow, which poses a risk of affecting other components or circuits on the PCB board.

[0005] The prior art discloses a patch-type welded nut post and a patch-type welding system, patent number CN202756386U, which discloses a patch-type welded nut post, including a nut seat and a hollow columnar body extending vertically upward along the surface of the nut seat. The inner wall of the hollow columnar body is provided with internal threads, and the two ends of the nut seat extend along its length to form a plurality of finger-like structures. This utility model embodiment employs an elongated nut seat with several finger-like structures extending along its length at both ends. The ends of the finger-like structures are beveled, allowing for the accumulation of more solder and improving welding reliability. Several positioning blocks are fixed on the opposite surface of the nut seat with the hollow columnar body, enabling the nut column to be accurately positioned on the PCB board and preventing rotation along the axis, thus providing strong torque resistance. The area of ​​the nut seat is larger than the cross-sectional area of ​​the hollow columnar body, resulting in a larger contact area between the nut seat and the PCB board, dispersing pressure, and ensuring a more secure fit, ultimately improving the overall performance of the LED display screen. Although the disclosed nut seat 1 and finger-like structure 4 form a structure similar to a rectangular metal stamping sheet, the structure, while planar, has a notch 5, and the welding structure is different. Furthermore, other structures are not disclosed, especially the structures of the two columns and the insulating sleeve.

[0006] A welding nut, patent number CN201599299U, is disclosed in the prior art. It is a cylindrical structure with a boss on the outer ring, which divides the nut into an insertion part and a connecting part. A threaded hole extending to the connecting part is machined in the insertion part. One end of the boss near the connecting part is recessed inward to form an annular step. This invention adds a step to the boss on the welding nut that contacts the mounting surface, allowing solder to coat the bottom layer of the boss during welding, preventing cold solder joints. Simultaneously, the solder height does not exceed the top of the step, effectively controlling solder usage and preventing waste, while also resulting in a more aesthetically pleasing solder joint. Although in the same field, it uses a cylindrical structure with a boss 11 to achieve connection welding and avoid cold solder joint problems; however, other structural details are not disclosed.

[0007] A patch nut and its processing technology are disclosed in the prior art (patent number CN104763725A). The patch nut includes a nut body with a welding end face. The edge of the welding end face has a ring of outwardly protruding serrated teeth. The processing technology includes: providing a sheet material; punching a through hole at a predetermined position on the sheet material; extruding the sheet material with the through hole to form the nut body; embossing the edge of the welding end face of the nut body; electroplating the nut body to form a tin plating layer on its outer surface; and tapping the through hole. The patch nut provided by this invention can make the welding firm, reliable, neat and beautiful; the processing technology provided by this invention realizes the processing of patch nuts by stamping, which has a higher production efficiency, equivalent to about 20 times that of lathe processing, and can meet the requirements of mass production; although the sawtooth protrusions 1011 on the periphery of the welding end face 101 are used to increase the welding area on the one hand, and to provide a place for the solder to flow after overflowing on the other hand, the rest of the structure is not disclosed. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a nut welding component and welding structure with high resistance to rotational torque for PCB boards, so as to solve the difficulties of the prior art.

[0009] To achieve the above and other related objectives, this utility model provides a nut welding component for PCB boards with high resistance to rotational torque, comprising: Welding nut 1, wherein the welding nut 1 is stepped, with one end being the large diameter end 11 and the other end being the small diameter end 12; Sheet metal part 2 is interference-fitted onto the small diameter end 12. The bottom of the sheet metal part 2 is tightly fitted to the end face of the large diameter end 11 near the small diameter end 12. The four sides of the sheet metal part 2 extend horizontally outward toward the circumference of the large diameter end 11. An insulating sleeve 3 is open on one side and closed on the other, forming a cavity 31 inside to accommodate the welding nut 1. The insulating sleeve 3 is fitted onto the large diameter end 11 of the welding nut 1.

[0010] In this technical solution, the welding nut 1 adopts a stepped structure, clearly distinguishing the large-diameter end 11 and the small-diameter end 12, providing a basis for the positioning and fit of each component; the sheet metal part 2 is interference-fitted to the small-diameter end 12, and its bottom is tightly fitted to the end face of the large-diameter end 11. The horizontally extended structure around the perimeter effectively increases the welding contact area with the PCB board, thereby enhancing the welding bonding force and resistance to rotational torque; the insulating sleeve 3, with a cavity shape that is open on one side and closed on the other, completely covers the welding nut 1 from the large-diameter end 11, forming a reliable integrated insulation protection, effectively preventing the risk of electrical short circuit.

[0011] According to the preferred embodiment, the welding nut 1 includes an integral and coaxially arranged large-diameter end 11 and small-diameter end 12; The outer diameter of the small diameter end 12 matches the inner diameter of the mounting through hole on the PCB board; The outer diameter of the large-diameter end 11 is larger than the inner diameter of the mounting through hole on the PCB board; An annular groove 13 is provided on the outer periphery of the side of the large-diameter end 11 away from the small-diameter end 12.

[0012] Furthermore, the height of the large-diameter end 11 is much greater than the height of the small-diameter end 12, while the height of the small-diameter end 12 is usually no greater than the thickness of the PCB board.

[0013] In this technical solution, the welding nut 1 adopts an integrated coaxial structure with a large-diameter end 11 and a small-diameter end 12. Since the outer diameter of the large-diameter end 11 is larger than the inner diameter of the mounting through hole on the PCB board, when the welding nut 1 is placed in place, the large-diameter end 11 can naturally overlap the PCB board surface, forming a reliable mechanical limit. In addition, the annular groove 13 opened on the outer circumference of the large-diameter end 11 away from the small-diameter end 12 provides a matching snap-fit ​​position for the insulating sleeve 3, so that the insulating sleeve 3 can be firmly snapped into this groove, thereby achieving a quick and precise engagement with the nut, effectively avoiding the risk of falling off during high-temperature welding or subsequent use.

[0014] According to the preferred embodiment, the large-diameter end 11 and the small-diameter end 12 of the welding nut 1 are provided with through holes or grooves to form a through hole structure or a blind hole structure.

[0015] In this technical solution, the welding nut 1 is not limited to a through hole or a blind hole structure, which effectively improves versatility. The through hole structure provides a complete through channel for bolts or screws, which is suitable for standard threaded connection scenarios that require fixing from one side of the PCB board to the other side; while the blind hole structure can effectively prevent dust, moisture or solder from entering the internal threads from the other end of the nut, keeping the threads clean and intact, and is particularly suitable for dustproof and waterproof applications that require sealing.

[0016] According to the preferred embodiment, sheet metal part 2 includes: The stamping sheet 21 has an outer diameter larger than the outer diameter of the large diameter end 11, and the stamping sheet 21 has a square structure. Connection hole 22: The stamping sheet 21 is coaxially provided with a connection hole 22 that is sleeved on the small diameter end 12.

[0017] Furthermore, the stamping sheet 21 has chamfers 23 around its perimeter.

[0018] In this technical solution, the outer diameter of the stamping sheet 21 is larger than that of the large-diameter end 11 and the outer diameter of the insulating sleeve 3, thereby expanding the welding area and enabling the sheet metal part 2 to form the maximum area of ​​welding contact with the PCB board. The connecting hole 22 coaxially opened in the center of the stamping sheet 21 allows it to be precisely fitted and interference-fitted onto the small-diameter end 12 of the welding nut 1, facilitating quick docking and assembly. In addition, the chamfers 23 set around the stamping sheet 21 not only facilitate the introduction of the PCB board during assembly, but also guide the solder to form a smooth weld seam during the welding process, reducing stress concentration and improving the stability of welding quality.

[0019] According to the preferred embodiment, positioning posts 24 extend vertically from both ends of one side of the stamping sheet 21.

[0020] Furthermore, the number and position of the positioning posts 24 correspond to the structure of the positioning holes on the PCB board 4.

[0021] In this technical solution, before soldering, simply align the two positioning posts and insert them into the corresponding positioning holes on the PCB board to achieve fast and accurate pre-positioning. On the other hand, the positioning post structure provides strong anti-rotation and anti-displacement capabilities. During the subsequent reflow soldering process, the molten solder may cause the components to move slightly, and the positioning posts 24 inserted into the holes can effectively resist such displacement and always maintain accurate alignment, thereby ensuring the stability and consistency of soldering quality.

[0022] According to the preferred embodiment, the height of the small-diameter end 12 does not exceed the thickness of the sheet metal part 2.

[0023] Furthermore, the height of the small-diameter end 12 is the same as the thickness of the sheet metal part 2.

[0024] In this technical solution, when the height of the small diameter end 12 is the same as the thickness of the sheet metal part 2, the end face of the small diameter end 12 can be flush with the bottom surface of the sheet metal part 2, forming a complete, stepless assembly plane. This allows the sheet metal part to be completely fitted to the PCB pad surface when the welding nut 1 and the sheet metal part 2 are placed on the PCB board, avoiding gaps caused by the small diameter end being too high and lifting the sheet metal part. The above-mentioned beneficial effects also exist when the height of the small diameter end 12 is less than the thickness of the sheet metal part 2.

[0025] According to the preferred embodiment, a protruding positioning ring 32 is provided on the inner surface of the cavity 31 of the insulating sleeve 3, and the positioning ring 32 is engaged in the annular groove 13 during installation.

[0026] Furthermore, the positioning ring 32 and the annular slot 13 are located at the tail end away from the PCB board.

[0027] In this technical solution, during pairing, the positioning ring 32 of the insulating sleeve 3 will engage with the annular groove 13 to form a secure snap-fit ​​connection, achieving rapid mechanical interlocking. This effectively prevents the insulating sleeve from loosening due to vibration or collision during subsequent handling, welding processes, or use, ensuring the durability and stability of the insulation protection. Furthermore, placing the mechanically interlocked area on top of the component keeps it away from the thermal stress and physical interference transmitted from the PCB board direction during welding, allowing the insulating sleeve 3 to tightly cover the welding nut 1 and withstand temperatures up to 250 degrees Celsius without detaching.

[0028] According to the preferred embodiment, after installation, there is a gap between the insulating sleeve 3 and the stamping piece 21.

[0029] Furthermore, the height of the insulating sleeve 3 is no greater than the height of the large-diameter end 11.

[0030] In this technical solution, a gap is maintained between the insulating sleeve 3 and the stamping piece 21 to prevent the insulating sleeve 3 from contacting other structures during installation and thus causing mutual interference. In addition, redundant space is provided to prevent the metal nut that expands under the high temperature of welding from squeezing the insulating sleeve 3, preventing deformation or damage, and ensuring the integrity of its insulation function.

[0031] A welding structure includes a nut welding component for PCB board with high resistance to rotational torque and a PCB board 4, wherein a welding nut 1 in the nut welding component for PCB board with high resistance to rotational torque is inserted into a mounting hole in the PCB board 4. The stamped sheet 21 is welded to the PCB board 4.

[0032] Furthermore, the insulating sleeve 3 can withstand a high temperature of 250 degrees Celsius and will not detach from the welded nut 1 for 3 minutes.

[0033] In this technical solution, by transferring the welding surface of the welding nut 1 to the stamping plate 21, the contact area between the solder and the PCB board 4 is increased, which not only significantly improves the bonding force of the welding, but also improves the resistance to rotational torque, effectively resisting the rotational force when tightening the screws and preventing loosening; at the same time, the insulating sleeve 3 insulates the possible electrical contact points of the nut, and together with the stamping plate 21, it can effectively prevent the molten solder from excessively penetrating and accumulating into the mounting holes of the PCB board 4, avoiding the possible cold solder joints or potential impact on the circuitry inside the board.

[0034] According to the preferred embodiment, positioning holes are provided on the PCB board 4 corresponding to the positioning posts 24.

[0035] Furthermore, a pair of positioning pins 24 and positioning holes are provided, and both are located on the same side of the stamping sheet 21.

[0036] In this technical solution, the cooperation between the positioning pin 24 and the positioning hole effectively avoids assembly errors caused by incorrect orientation and ensures effective assembly quality; the two positioning points form a stable axis, which can effectively resist rotational torque.

[0037] This invention utilizes the stamped sheet of sheet metal as the main welding surface, increasing the welding contact area with the PCB board, improving resistance to rotational torque, and preventing loosening. In addition, the increased welding surface reduces welding time and effectively prevents the tin plating layer from dissolving into the PCB holes after welding. The insulating sleeve forms a secure snap-fit ​​connection with the annular groove on the large diameter end of the nut through its internal positioning ring, eliminating the risk of short circuit.

[0038] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of Embodiment 1. Figure 2 This is a cross-sectional view of Embodiment 1. Figure 3 This is a three-dimensional structural diagram of the welding nut in this embodiment 1; Figure 4 This is a three-dimensional structural diagram of the sheet metal part in this embodiment 1; Figure 5 This is a three-dimensional structural diagram of the insulating sleeve in this embodiment 1; Figure 6 The diagram shown is a structural schematic of this embodiment two. Label Explanation 1. Welded nut; 11. Large diameter end; 12. Small diameter end; 13. Annular groove; 2. Sheet metal parts; 21. Stamped sheet; 22. Connecting hole; 23. Chamfer; 24. Positioning post; 3. Insulating sleeve; 31. Cavity; 32. Positioning ring; 4. PCB board. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0041] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0043] This utility model proposes a high-rotation-torque-resistant nut welding component and welding structure for PCB boards, used in SMT surface mount nut welding. This utility model does not limit the type of welding object, but the structure of this high-rotation-torque-resistant nut welding component and welding structure for PCB boards is particularly suitable for the needs of PCB boards.

[0044] In general, the high-rotation-torque-resistant nut welding component and welding structure for PCB boards proposed in this utility model mainly includes a welding nut 1, a sheet metal part 2, and an insulating sleeve 3. See also... Figure 1 It shows the arrangement of the welding nut 1, sheet metal part 2, and insulating sleeve 3. Example 1

[0045] To improve weld strength and resistance to rotational torque, and to address the issues in the prior art where the tin plating of the SMT nut melts into the holes of the PCB board after welding and accumulates, resulting in a lower resistance to rotational torque after welding; furthermore, the exposed metal parts of the SMT nut after welding are directly exposed and cannot achieve insulation, posing a potential electrical short circuit problem, this embodiment provides a stepped structure for the welding nut 1, clearly distinguishing the large-diameter end 11 and the small-diameter end 12, providing a basis for the positioning and fit of each component; the sheet metal part 2 is interference-fitted onto the small-diameter end 12, with its bottom tightly fitting the end face of the large-diameter end 11, and the horizontally extended structure around it effectively increases the welding contact area with the PCB board, thereby enhancing the welding bond and resistance to rotational torque; the insulating sleeve 3, with a cavity shape that is open on one side and closed on the other, completely covers the welding nut 1 from the large-diameter end 11, forming reliable integrated insulation protection and effectively preventing the risk of electrical short circuits.

[0046] As shown in the figure, the nut welding component provided in this embodiment includes a welding nut 1, a sheet metal part 2, and an insulating sleeve 3. The three are coaxially mounted together, and the insulating sleeve 3 is inserted from the tail end of the welding nut 1. The sheet metal part 2 is fitted onto the other end of the welding nut 1 for mating and welding with the PCB board, thereby increasing the welding contact surface and also achieving an insulation effect on the possible electrical contact points of the nut.

[0047] The welding nut 1 is stepped and includes an integral and coaxially arranged large-diameter end 11 and small-diameter end 12. The outer diameter of the small-diameter end 12 matches the inner diameter of the mounting through hole on the PCB board, and the outer diameter of the large-diameter end 11 is larger than the inner diameter of the mounting through hole on the PCB board. When the welding nut 1 is placed in place, the large-diameter end 11 can naturally overlap the surface of the PCB board to form a reliable mechanical limit. In addition, an annular groove 13 is opened on the outer circumference of the large-diameter end 11 away from the small-diameter end 12, which provides a matching snap-fit ​​position for the insulating sleeve 3, so that the insulating sleeve 3 can be firmly snapped into this groove, thereby achieving a quick and precise engagement with the nut and effectively avoiding the risk of falling off during high-temperature welding or subsequent use.

[0048] Preferably, the large-diameter end 11 and the small-diameter end 12 of the welding nut 1 are provided with through holes or grooves to form a through-hole structure or a blind hole structure. In this embodiment, in order to improve versatility and adapt to various different needs, the welding nut 1 is not limited to a through-hole or blind hole structure. The through-hole structure provides a complete through channel for bolts or screws, which is suitable for standard threaded connection scenarios that need to be fixed from one side of the PCB board to the other side; while the blind hole structure can effectively prevent dust, moisture or solder from entering the internal threads from the other end of the nut, keeping the threads clean and intact, and is particularly suitable for dustproof and waterproof applications that require sealing.

[0049] Furthermore, preferably, the height of the small-diameter end 12 does not exceed the thickness of the sheet metal part 2; when the height of the small-diameter end 12 is the same as the thickness of the sheet metal part 2, the end face of the small-diameter end 12 can be flush with the bottom surface of the sheet metal part 2, forming a complete, stepless assembly plane, so that when the welding nut 1 and the sheet metal part 2 are placed on the PCB board, the sheet metal part can be completely attached to the PCB pad surface, avoiding gaps caused by the small-diameter end being too high and lifting the sheet metal part; when the height of the small-diameter end 12 is less than the thickness of the sheet metal part 2, the above-mentioned beneficial effects also exist.

[0050] The structure of sheet metal part 2 needs to be explained in detail. On the one hand, a stamping plate 21 is provided for the mating and installation of the welding nut 1. On the other hand, a positioning post 24 is provided on the outer periphery of the stamping plate 21 for the precise installation of the PCB board and to resist rotational torque.

[0051] As mentioned above, the stamping sheet 21 adopts a square structure, and the outer diameter of the stamping sheet 21 is larger than the outer diameter of the large diameter end 11 and the outer diameter of the insulating sleeve 3, which expands the welding area and allows the sheet metal part 2 to form the maximum area of ​​welding contact with the PCB board. The connecting hole 22 opened coaxially in the center of the stamping sheet 21 allows it to be accurately fitted and interference-fitted on the small diameter end 12 of the welding nut 1, which facilitates quick docking and assembly. In addition, the chamfers 23 set around the stamping sheet 21 not only facilitate the introduction of the PCB board during assembly, but also guide the solder to form a smooth weld during the welding process, reduce stress concentration, and improve the stability of welding quality.

[0052] Furthermore, a pair of positioning posts 24 are installed, extending vertically from both ends on one side of the stamping sheet 21. Since the number and position of the positioning posts 24 correspond to the structure of the positioning holes on the PCB board 4, before soldering, it is only necessary to align the two positioning posts and insert them into the corresponding positioning holes on the PCB board, thus achieving fast and accurate pre-positioning. On the other hand, the positioning post structure provides strong anti-rotation and anti-displacement capabilities. During the subsequent reflow soldering process, the molten solder may cause the components to move slightly, and the positioning posts 24 inserted into the holes can effectively resist such displacement and always maintain accurate alignment, thereby ensuring the stability and consistency of the soldering quality.

[0053] During installation, sheet metal part 2 is interference-fitted onto the small-diameter end 12. The bottom of sheet metal part 2 is tightly fitted to the end face of the large-diameter end 11 near the small-diameter end 12. An insulating sleeve 3 is fitted onto the large-diameter end 11 of the welding nut 1. The insulating sleeve 3 is open on one side and closed on the other, forming a cavity 31 to accommodate the welding nut 1. A protruding positioning ring 32 is provided on the inner surface of the cavity 31. The positioning ring 32 is engaged in the annular groove 13 during installation. During mating, the positioning ring 32 of the insulating sleeve 3 will engage in the annular groove 13 to form a firm snap-fit ​​connection, achieving rapid mechanical interlocking. This effectively prevents the insulating sleeve from loosening due to vibration or collision during subsequent handling, welding processes, or use, ensuring the durability and stability of the insulation protection. In addition, the positioning ring 32 and the annular groove 13 are positioned at the tail end away from the PCB board, keeping it away from the thermal stress and physical interference transmitted from the PCB board direction during welding. This allows the insulating sleeve 3 to tightly cover the welding nut 1 and withstand temperatures up to 250 degrees Celsius without detaching.

[0054] After installation, since the height of the insulating sleeve 3 is no greater than the height of the large diameter end 11, there is a gap between the insulating sleeve 3 and the stamping piece 21 after installation. This avoids the insulating sleeve 3 from contacting other structures during installation and thus preventing mutual interference. In addition, it provides redundant space to prevent the metal nut that expands under the high temperature of welding from squeezing the insulating sleeve 3, preventing deformation or damage, and ensuring the integrity of its insulation function. Example 2

[0055] like Figure 6 As shown, this second embodiment, based on the first embodiment, provides a welding structure. This structure includes the nut welding component and PCB board 4 provided in the first embodiment. The welding nut 1, within the high-torque-resistant nut welding component, is inserted into the mounting hole of the PCB board 4. During welding, it is connected to the PCB board 4 via a stamping plate 21. Transferring the welding surface of the welding nut 1 onto the stamping plate 21 increases the contact area between the solder and the PCB board 4, significantly improving the welding bond strength and enhancing the resistance to rotational torque. This effectively resists the rotational force during subsequent screw tightening, preventing loosening. Furthermore, the insulating sleeve 3 insulates the nut from potential electrical contact points. The insulating sleeve 3 is also resistant to temperatures up to 250 degrees Celsius and will not detach from the welding nut 1 for 3 minutes. Combined with the stamping plate 21, this effectively prevents molten solder from excessively penetrating and accumulating in the mounting hole of the PCB board 4, avoiding potential cold solder joints or impacts on the circuitry within the board.

[0056] In this embodiment, a pair of positioning pins 24 and positioning holes are provided, and both are located on the same side of the stamping sheet 21. The cooperation between the positioning pins 24 and the positioning holes effectively avoids assembly errors caused by incorrect orientation and ensures effective assembly quality. The two positioning points form a stable axis, which can effectively resist rotational torque.

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A nut welding component with high resistance to rotational torque for PCB boards, characterized in that, include: Welding nut (1), the welding nut (1) is set in a stepped shape, one end is the large diameter end (11) and the other end is the small diameter end (12). Sheet metal part (2), the sheet metal part (2) is interference-fitted on the small diameter end (12), the bottom of the sheet metal part (2) is tightly fitted to the end face of the large diameter end (11) near the small diameter end (12), and the four sides of the sheet metal part (2) extend horizontally outward toward the circumferential direction of the large diameter end (11). An insulating sleeve (3) is open on one side and closed on the other, forming a cavity (31) inside to accommodate a welding nut (1). The insulating sleeve (3) is fitted onto the large diameter end (11) of the welding nut (1) from one side and assembled on the large diameter end (11).

2. The nut welding component for PCB boards with high resistance to rotational torque according to claim 1, characterized in that, The weld nut (1) includes a large-diameter end (11) and a small-diameter end (12) that are integrally and coaxially arranged. The outer diameter of the small diameter end (12) matches the inner diameter of the mounting through hole on the PCB board; The outer diameter of the large-diameter end (11) is larger than the inner diameter of the mounting through hole on the PCB board; An annular groove (13) is provided on the outer periphery of the side of the large-diameter end (11) away from the small-diameter end (12).

3. The nut welding component for PCB boards with high resistance to rotational torque according to claim 2, characterized in that, The welding nut (1) has through holes or grooves in its large diameter end (11) and small diameter end (12) to form a through hole structure or a blind hole structure.

4. The nut welding component for PCB boards with high resistance to rotational torque according to claim 3, characterized in that, The sheet metal part (2) includes: A stamped sheet (21) has an outer diameter greater than the outer diameter of the large diameter end (11), and the stamped sheet (21) has a square structure. Connection hole (22): The stamping sheet (21) is coaxially provided with a connection hole (22) that is sleeved on the small diameter end (12).

5. The nut welding component for PCB boards with high resistance to rotational torque according to claim 4, characterized in that, Positioning posts (24) extend vertically from both ends of one side of the stamped sheet (21).

6. The nut welding component for PCB boards with high resistance to rotational torque according to claim 5, characterized in that, The height of the small diameter end (12) does not exceed the thickness of the sheet metal part (2).

7. The nut welding component for PCB boards with high resistance to rotational torque according to claim 6, characterized in that, A protruding positioning ring (32) is provided on the inner surface of the cavity (31) of the insulating sleeve (3), and the positioning ring (32) is locked in the annular groove (13) during installation.

8. The nut welding component for PCB boards with high resistance to rotational torque according to claim 7, characterized in that, After installation, there is a gap between the insulating sleeve (3) and the stamping piece (21).

9. A welded structure, characterized in that, The PCB board includes a high-rotation-torque-resistant nut welding component for PCB board and a PCB board (4) according to any one of claims 1-8, wherein the welding nut (1) in the high-rotation-torque-resistant nut welding component for PCB board is inserted into the mounting hole of the PCB board (4); The stamped sheet (21) is welded to the PCB board (4).

10. The welded structure according to claim 9, characterized in that, The PCB board (4) has positioning holes corresponding to the positioning posts (24).

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