Shunt excitation coil riveting device

Abstract

The invention relates to the technical field of mechanical riveting, in particular to a shunt excitation coil riveting device which comprises a positioning seat, the positioning seat is used for positioning a U-shaped frame, a riveting assembly comprises a liftable riveting seat, a riveting column and a butt joint positioning block, the riveting column is installed in the riveting seat, an elastic piece is arranged between the riveting column and the riveting seat, and the butt joint positioning block is fixed to the bottom end of the riveting seat. When the riveting base is pressed downwards, preset pre-tightening force is applied to the cover plate through the riveting column, then the position of the connecting end is adjusted through the butt joint positioning block, and finally the riveting base continues to be pressed downwards through the riveting column to complete the riveting process. According to the riveting device, the position of the connecting end can be accurately positioned and adjusted, and the riveting quality and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of mechanical riveting technology, and in particular to a riveting device for a shunt coil. Background Technology

[0002] The shunt trip unit is a key protective component in circuit breaker electrical equipment, and its assembly quality directly determines the reliability and safety of the equipment operation. In the typical assembly process of the shunt trip unit, the cover plate containing components such as the coil needs to be fixedly connected to a U-shaped frame (hereinafter referred to as "U-frame") by riveting.

[0003] In existing technologies, general-purpose riveting equipment is commonly used. During operation, a U-shaped frame is placed on a workbench, a cover plate is manually placed over it, and the connecting ends on both sides of the cover plate are aligned with the connecting grooves on the U-shaped frame. Then, the riveting head is activated to rivet the connection. However, this traditional riveting method has serious technical drawbacks when applied to special structural components such as shunt trip units.

[0004] Specifically, shunt trip units typically contain elastic energy storage elements such as return springs. During assembly, these elastic elements are in a pre-compressed state, exerting a continuous upward force on the cover plate. When a conventional riveting head presses down vertically, this upward force and the downward riveting pressure create a torque, causing the arms on both sides of the U-shaped frame (i.e., the location of the connecting groove) to expand and deform outward, as if being "pried open." This deformation makes it difficult for the connecting end of the cover plate to be accurately and stably aligned and inserted into the connecting groove of the U-shaped frame. Even if riveting is barely completed, misalignment often results in gaps between the riveting point and the U-shaped frame, leading to severely insufficient connection strength and a low product qualification rate. This unstable connection quality affects the operational accuracy of the internal mechanism of the trip unit, and may even cause malfunction when tripping is required, posing a serious safety hazard. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this application provides a shunt coil riveting device, which achieves precise positioning and synchronous riveting of the U-shaped frame and the cover plate through a positioning seat, a riveting post with elasticity and a docking positioning block with a guide surface. This ensures that the connecting end is accurately inserted into the connecting groove and the position is adjusted under pre-tightening force to finally complete the riveting. This improves assembly accuracy, joint reliability and production efficiency, and avoids misalignment and damage.

[0006] This application is achieved through the following technical solution: A shunt coil riveting device includes a trip unit, the trip unit comprising a cover plate and a U-shaped frame, the cover plate having connecting ends on both sides, and the U-shaped frame having connecting grooves, the connecting ends being capable of engaging with the connecting grooves. The riveting device includes: Positioning seat, used to position the U-shaped frame; A riveting assembly includes a riveting seat, a riveting post, and a mating positioning block. The riveting seat is capable of rising or falling. The riveting post is installed inside the riveting seat, and an elastic element is provided between the riveting post and the riveting seat. The bottom end of the riveting post can abut against the top surface of the cover plate. The mating positioning block is fixed to the bottom end of the riveting seat and is positioned opposite the connecting end. At least two mating positioning blocks are provided, and a mating guide surface is provided on the side of the two mating positioning blocks that are close to each other. The mating guide surface can abut against the connecting end to push the connecting end to align with the connecting groove. In this process, the riveting seat is pressed down, and a preset pre-tightening force is applied to the cover plate through the riveting post. Then, under the premise of the preset pre-tightening force, the position of the connecting end is adjusted by the docking positioning block. Finally, the riveting post continues to press down to complete the riveting process.

[0007] By adopting the above technical solution, a pre-tightening force can be applied to the cover plate before direct riveting. After applying the pre-tightening force, its inclined surface (guide surface) is used to physically push and calibrate the connecting end of the cover plate, ensuring precise alignment with the connecting groove of the U-shaped frame. This solves the problem of misalignment between the cover plate and the U-shaped frame before riveting in traditional riveting. The three-step method of "pre-pressing and fixing, then guiding and aligning, and finally riveting" greatly improves the alignment accuracy and success rate of riveting. The presence of the elastic element allows pre-pressing and alignment to be performed simultaneously without damaging the components, while the docking guide surface achieves automatic calibration, reducing defective products caused by human or equipment errors and improving product quality and production efficiency.

[0008] Optionally, the positioning seat has a positioning groove, which is closed on three sides and open on one side, allowing the trip unit to enter and exit the positioning groove through the opening.

[0009] By adopting the above technical solution, this "three-sided closed, one-sided open" design greatly facilitates the loading and unloading of workpieces (trippers). Operators or automated robotic arms can easily slide the workpieces into or out of the positioning slot from the opening direction without the need for complex lifting or rotating actions.

[0010] Optionally, a limiting seat can be detachably connected to the side of the positioning seat away from the opening. The limiting seat has an L-shaped vertical cross-section, with one end facing the opening. The top surface of the limiting seat can abut against the bottom surface of the riveting seat. The limiting seat has a clearance hole for the riveting post to pass through, and a clearance space is formed between the limiting seat and the U-shaped frame.

[0011] By adopting the above technical solution, the top surface of the limiting seat can serve as the physical limit position for the descent of the riveting assembly; a hole is reserved for the riveting post to pass through; and space is left between it and the U-shaped frame. By abutting against the bottom surface of the riveting seat, excessive riveting stroke can be prevented, avoiding damage to the workpiece or equipment due to over-riveting, thus providing a safety protection function. The "avoidance space" can serve as a physical barrier for the U-shaped frame to move backward, assisting the U-shaped frame in achieving more precise axial positioning.

[0012] Optionally, a linear module is also included, wherein the positioning seat is mounted on the output end of the linear module, and the direct module is used to drive the positioning seat to move closer to or away from the riveting assembly along the opening direction.

[0013] By adopting the above technical solution, the automatic transfer of the positioning seat (i.e., the workpiece) is achieved. After the operator or robotic arm places the workpiece on the positioning seat, the linear module can automatically, quickly, and accurately deliver the workpiece to the riveting station and automatically withdraw after riveting is completed. This is a key step in achieving production automation, greatly reducing manual intervention and improving the consistency of production cycle and positioning.

[0014] Optionally, an elastic pad is provided on the side of the positioning groove that is in contact with the U-shaped frame.

[0015] By adopting the above technical solution, the surface of the U-shaped frame is protected from scratches or hard impacts when it is placed into the positioning groove. The elastic gasket can compensate for the dimensional tolerances of the U-shaped frame itself, allowing it to be more stably and tightly fixed in the positioning groove, preventing displacement due to vibration during riveting, and further improving the reliability of positioning.

[0016] Optionally, the U-shaped frame includes a limiting part near the opening, and the positioning seat has a limiting structure on the side opposite to the opening. The limiting structure and the limiting part together limit the position of the cover plate.

[0017] By adopting the above technical solution, a more direct and precise pre-positioning of the "cover plate" is provided. This structure ensures that the cover plate will not slide back and forth on the U-shaped frame before the riveting assembly descends. This lays a solid foundation for the precise alignment of the "docking positioning block," reducing the amount of displacement that the docking positioning block needs to be corrected, and making the entire alignment process faster and more reliable.

[0018] Optionally, the limiting structure includes a limiting block fixed on the positioning seat, the limiting block having a limiting surface that cooperates with the limiting part, the limiting surface being used to abut against the cover plate.

[0019] By adopting the above technical solution, a precise limiting block and limiting surface can be designed to achieve physical limiting of the cover plate in a simple and effective way. The structure is simple and the reliability is high.

[0020] Optionally, the top surfaces of the positioning seat near the opening are provided with cooling components, and the cooling components have air outlets facing the connecting groove area; the cooling components are used to spray cooling airflow into the connecting groove area before the connecting end is riveted to the connecting groove, so that the connecting groove expands due to cooling and contraction.

[0021] By employing the above technical solution, heat is generated during riveting between the connecting end and the connecting groove. Cooling the U-shaped frame causes the connecting groove to shrink, resulting in a tighter interference fit. A low-temperature gas stream (such as nitrogen vaporized from liquid nitrogen) is sprayed into the connecting groove area of ​​the U-shaped frame (usually a plastic part), temporarily hardening and brittleing it. In this state, the metal connecting end of the cover plate is easier to stamp, embed, and rivet, preventing excessive deformation of the plastic part under stress, thus forming a stronger and more aesthetically pleasing riveting point.

[0022] Optionally, the cooling assembly includes a cooling pipe connected to the air outlet and a solenoid valve for controlling the opening and closing of the cooling pipe; the solenoid valve is used to connect to an external cooling air source.

[0023] By adopting the above technical solution, the solenoid valve can be precisely controlled by the equipment's PLC (Programmable Logic Controller) to achieve timed and quantitative injection of cooling airflow, which is precisely synchronized with the riveting action.

[0024] Optionally, the cooling pipe is disposed within the positioning seat.

[0025] By adopting the above technical solution, the piping is built-in, avoiding the clutter of external pipelines and making the overall structure of the equipment simpler and more compact. The built-in piping is less susceptible to external impacts, wear, or contamination, improving the stability and durability of the equipment operation.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, the riveting device pushes the connecting end to the connecting groove through the docking guide surface of the docking positioning block, which solves the problem of connection position deviation in the traditional connection method and ensures the accuracy of the connection between the trip cover plate and the U-shaped frame; 2. This application utilizes the downward pressing of the riveting seat to first apply a preset pre-tightening force to the cover plate through the riveting post, then adjust the position of the connection end through the docking positioning block, and finally continue to press down to complete the riveting, which avoids the thermal deformation caused by welding and the loosening problem that may occur in bolt connection, and improves the stability and reliability of the connection. 3. This application uses a cooling component to spray cooling airflow into the connecting groove area before riveting the connecting end and the connecting groove. This causes the connecting groove to expand due to cooling and contraction, which is beneficial to a more stable connection between the connecting end and the connecting groove, and further improves the accuracy and stability of the connection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the positioning seat described in Embodiment 1; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 yes Figure 1 A sectional view; Figure 4 yes Figure 3 Enlarged schematic diagram of part B in the middle; Figure 5 This is a schematic diagram of the structure of the elastic gasket described in Embodiment 2; Figure 6 This is a schematic diagram of the cooling component described in Embodiment 2.

[0028] In the diagram: 1. Trip unit; 11. Cover plate; 111. Connecting end; 12. U-shaped frame; 121. Connecting groove; 122. Limiting part; 2. Positioning seat; 21. Positioning groove; 211. Opening; 3. Riveting assembly; 31. Riveting seat; 311. Elastic element; 32. Riveting post; 33. Docking positioning block; 331. Docking guide surface; 4. Limiting seat; 41. Clearance hole; 42. Clearance space; 5. Linear module; 6. Elastic gasket; 7. Limiting structure; 71. Limiting block; 711. Limiting surface; 8. Cooling assembly; 81. Air outlet; 82. Cooling pipe; 83. Solenoid valve. Detailed Implementation

[0029] The following will be combined with the appendix Figure 1-6 The technical solutions of the various embodiments of this application have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Reference Figure 1 and Figure 2 In related technologies, the trip unit 1 includes a cover plate 11 and a U-shaped frame 12. The cover plate 11 has connecting ends 111 on both sides, and the U-shaped frame 12 has connecting grooves 121, in which the connecting ends 111 can be engaged. This application mainly utilizes a riveting device to achieve riveting between the cover plate 11 and the U-shaped frame 12.

[0031] Example 1 Reference Figure 2 and Figure 3This application discloses a shunt coil riveting device, including a positioning seat 2 and a riveting assembly 3. The positioning seat 2 is used to position a U-shaped frame 12. The riveting assembly 3 includes a riveting base 31, a riveting post 32, and a docking positioning block 33. The riveting base 31 can rise or fall. The riveting post 32 is installed inside the riveting base 31, and an elastic element 311 is provided between the riveting post 32 and the riveting base 31. The bottom end of the riveting post 32 can abut against the top surface of the cover plate 11. The docking positioning block 33 is fixed to the bottom end of the riveting base 31 and is opposite to the connecting end. 111 is configured such that at least two docking positioning blocks 33 are provided, and the two docking positioning blocks 33 are provided with docking guide surfaces 331 on the side that are close to each other. The docking guide surfaces 331 can abut against the connecting end 111 to push the connecting end 111 to align with the connecting groove 121. The riveting seat 31 is pressed down, and a preset pre-tightening force is applied to the cover plate 11 through the riveting post 32. Then, under the premise of the preset pre-tightening force, the position of the connecting end 111 is adjusted by the docking positioning blocks 33. Finally, the riveting process is completed by continuing to press down through the riveting post 32.

[0032] Specifically, the riveting seat 31 of the riveting assembly 3 is typically made of high-strength metal material, such as stainless steel, to ensure it can withstand greater pressure without deformation during riveting. The riveting post 32 is installed inside the riveting seat 31. The elastic element 311 between the riveting post 32 and the riveting seat 31 can be a spring, which provides a buffering effect, making the riveting post 32 more stable when applying preload to the cover plate 11. The bottom end of the riveting post 32 can be designed as a flat, round surface, allowing for better contact with the top surface of the cover plate 11 and even pressure application. The mating positioning block 33 is fixed to the bottom end of the riveting seat 31. The mating positioning block 33 can be made of hard plastic, providing both strength and reducing overall weight. At least two docking positioning blocks 33 are provided. The two docking positioning blocks 33 are provided with docking guide surfaces 331 on the side that are close to each other. The docking guide surfaces 331 can be inclined planes. When the two docking guide surfaces 331 abut against the sides of the two connecting ends 111 respectively, they can push the connecting ends 111 to align with the connecting groove 121.

[0033] During the riveting process, the riveting seat 31 presses down, first applying a preset preload to the cover plate 11 through the riveting post 32. This preload allows the cover plate 11 and the U-shaped frame 12 to initially fit together. Then, under the preset preload, the mating guide surface 331 of the mating positioning block 33 abuts against the connecting end 111, pushing the connecting end 111 to align with the connecting groove 121, adjusting the position of the connecting end 111 to ensure accurate connection. Finally, the riveting post 32 continues to press down, completing the riveting process. Throughout the process, the elastic element 311 acts as a buffer and adjusts the pressure, ensuring a smooth and accurate riveting process.

[0034] Reference Figure 1 and Figure 2The positioning seat 2 has a positioning groove 21, which is closed on three sides and open on one side 211. The trip unit 1 can enter and exit the positioning groove 21 through the opening 211.

[0035] The positioning groove 21's structural design facilitates the insertion and removal of the U-shaped frame 12, while its three-sided enclosed structure provides better positioning for the U-shaped frame 12. The positioning groove 21 can be made of metal, such as aluminum alloy, which offers good strength and wear resistance. Alternatively, it can be made of engineering plastics, such as polycarbonate, which is lightweight and low-cost. The inner wall of the positioning groove 21 can be smoothed to reduce friction with the U-shaped frame 12, further facilitating its insertion and removal.

[0036] Reference Figure 3 and Figure 4 The positioning seat 2 is detachably connected to the limiting seat 4 on the side opposite to the opening 211. The limiting seat 4 has an L-shaped vertical section. One end of the limiting seat 4 faces the opening 211. The top surface of the limiting seat 4 can abut against the bottom surface of the riveting seat 31. The limiting seat 4 has a clearance hole 41 for the riveting post 32 to pass through. A clearance space 42 is formed between the limiting seat 4 and the U-shaped frame 12.

[0037] The limiting seat 4 can be detachably connected to the positioning seat 2 by bolts, which facilitates installation and disassembly. The L-shaped structure design of the limiting seat 4 can both limit the riveting seat 31 and provide clearance space 42 for the riveting post 32. The limiting seat 4 can be made of the same material as the positioning seat 2 to ensure its strength and stability.

[0038] Reference Figure 1 and Figure 2 It also includes a linear module 5, with a positioning seat 2 mounted on the output end of the linear module 5. The direct module is used to drive the positioning seat 2 to move closer to or away from the riveting assembly 3 along the opening 211 direction. The linear module 5 can be a slide rail linear module 5. By moving the positioning seat 2 through the linear module 5, the insertion and removal of the trip unit 1 can be made more convenient, improving work efficiency. The linear module 5 can also be a cylinder-driven linear module 5, using the cylinder to drive the positioning seat 2 to reciprocate.

[0039] The implementation principle of this embodiment is as follows: When the riveting assembly 3 (driven by a cylinder or servo motor) begins to press down, the first part to contact the cover plate 11 is the riveting post 32, which contains an elastic element 311 (such as a spring). Due to the presence of the elastic element 311, the riveting post 32 will first apply a controllable, pre-set preload force to the cover plate 11. The function of this force is to overcome the pushing force of the spring inside the release device 1, and to press the cover plate 11 smoothly onto the U-shaped frame 12, so that it fits stably and prevents it from shaking or tilting in subsequent operations. While applying the preload force, the riveting assembly 3 continues to descend. At this time, the docking positioning block 33 fixed to the bottom end of the riveting seat 31 begins to function. The docking guide surface 331 (usually a slope) designed on the docking positioning block 33 will contact the connecting ends 111 on both sides of the cover plate 11. As the riveting assembly 3 descends, the inclined plane generates an inward thrust, physically forcing the connecting end 111, which might otherwise have positional deviations, into the correct position, ensuring precise alignment with the connecting groove 121 on the U-shaped frame 12. After the first two stages (pre-pressing and alignment) are completed, the connecting end 111 has accurately fallen into the connecting groove 121. At this point, the riveting assembly 3 continues to press down, and the riveting post 32 transmits all the riveting pressure, stamping and deforming the connecting end 111 to complete the final riveting process and form a robust mechanical connection.

[0040] Example 2 Reference Figure 5 The difference between this embodiment and the first embodiment is that the side of the positioning groove 21 that is in contact with the U-shaped frame 12 is provided with an elastic pad 6.

[0041] The elastic pad 6 can be made of rubber material, which has good elasticity and cushioning properties. The elastic pad 6 can reduce the rigid contact between the positioning groove 21 and the U-shaped frame 12, avoid damage to the U-shaped frame 12 during the positioning process, and also improve the stability of positioning.

[0042] Reference Figure 1 and Figure 2 At the assembly station, the assembler places the cover plate 11 on the U-shaped frame 12 and pre-tightens the cover plate 11 to the U-shaped frame 12. However, due to the manual operation method, there is a possibility that the operator may not operate the cover plate 11 properly, resulting in the cover plate 11 merely being placed on the U-shaped frame 12. When the linear module 5 moves the U-shaped frame 12 rapidly to the riveting station, the U-shaped frame 12 transitions between a moving and a stationary state, during which time the cover plate 11 may deviate from the preset position of the U-shaped frame 12. Therefore, referring to... Figure 4 and Figure 6The U-shaped frame 12 includes a limiting part 122 near the opening 211. The positioning seat 2 has a limiting structure 7 on the side opposite to the opening 211. The limiting structure 7 and the limiting part 122 together limit the position of the cover plate 11. The limiting structure 7 includes a limiting block 71 fixed on the positioning seat 2. The limiting block 71 has a limiting surface 711 that cooperates with the limiting part 122. The limiting surface 711 is used to abut against the cover plate 11.

[0043] The limiting block 71 can be fixed to the positioning seat 2 by welding or bolting. The limiting surface 711 can be a flat plane that fits tightly with the limiting part 122, thereby accurately limiting the position of the cover plate 11. This design can prevent inaccurate riveting position caused by human negligence or failure to place the cover plate 11 in the designated position, resulting in misalignment between the connecting groove 121 and the connecting end 111.

[0044] Reference Figure 6 The top surfaces of the positioning base 2 near the opening 211 are provided with cooling components 8. The cooling components 8 have air outlets 81 facing the area of ​​the connecting groove 121. The cooling components 8 are used to spray cooling airflow into the area of ​​the connecting groove 121 before the connecting end 111 is riveted to the connecting groove 121, so that the connecting groove 121 expands due to cooling and contraction.

[0045] The cooling assembly 8 includes a cooling pipe 82 connected to the air outlet 81, and a solenoid valve 83 for controlling the opening and closing of the cooling pipe 82; the solenoid valve 83 is used to connect to an external cooling air source. The cooling pipe 82 is disposed within the positioning seat 2.

[0046] The cooling assembly 8 can use liquid nitrogen as the cooling gas source. Liquid nitrogen has an extremely low temperature, which can quickly cool and shrink the connecting groove 121. The solenoid valve 83 can precisely control the opening and closing of the cooling pipe 82, achieving precise control of the cooling process. The cooling pipe 82 can be made of copper tubing, which has good thermal conductivity and corrosion resistance.

[0047] The implementation principle of this embodiment is as follows: An elastic gasket 6 is added to the inner wall of the positioning seat 2. When the U-shaped frame 12 is placed into the positioning groove 21, the gasket acts as a buffer, protecting the surface of the U-shaped frame 12 from scratches caused by hard contact. More importantly, the elastic gasket 6 can compensate for the dimensional tolerances of the U-shaped frame 12 itself. Through slight elastic deformation, the U-shaped frame 12 is clamped more tightly and stably in the positioning groove 21, preventing it from undergoing slight displacement due to vibration during riveting, further improving the stability of positioning. A limiting structure 7 (such as a limiting block 71) is added to the positioning seat 2, which cooperates with the limiting part 122 on the U-shaped frame 12. This structure provides preliminary physical restriction on the position of the cover plate 11 before the riveting assembly 3 descends, preventing it from sliding back and forth on the U-shaped frame 12. This lays a better foundation for the subsequent precise guidance of the "docking positioning block 33", reduces the amount of adjustment required in the alignment process, and makes alignment faster and more reliable. Before riveting, a low-temperature airflow (such as liquid nitrogen) is sprayed into the connecting groove 121 area (usually a plastic part) of the U-shaped frame 12 through the cooling assembly 8 (cooling pipe 82 and air outlet 81 controlled by solenoid valve 83). The principle is based on the effect of thermal expansion and contraction. The low-temperature airflow causes the connecting groove 121 area to cool down and contract rapidly. For the plastic connecting groove 121, the cooling will also temporarily harden and make it brittle. The advantages of doing this are: after the plastic hardens, it is less likely to produce excessive plastic deformation when the connecting end 111 of the cover plate 11 is pressed in, making the riveting process more crisp and clean; before riveting, the connecting groove 121 is cooled down, and then the riveting assembly 3 presses it down. At this time, the contact between the connecting groove 121 and the connecting end 111 will generate heat, thereby generating a strong and continuous clamping force on the already riveted metal connecting end 111, forming a tighter "interference fit", which greatly enhances the strength and long-term stability of the connection. At the same time, the air outlet 81 can also spray room temperature gas into the area of ​​the connecting groove 121 to blow away debris, so that the connecting groove 121 and the connecting end 111 are cleaned before riveting, and then the cleaned connecting groove 121 and the connecting end 111 are riveted.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A shunt coil riveting device, comprising a trip unit (1), the trip unit (1) comprising a cover plate (11) and a U-shaped frame (12), the cover plate (11) having connecting ends (111) on both sides, the U-shaped frame (12) having connecting grooves (121), the connecting ends (111) being able to be engaged in the connecting grooves (121), characterized in that, The riveting device includes: Positioning seat (2) is used to position the U-shaped frame (12); The riveting assembly (3) includes a riveting seat (31), a riveting post (32), and a docking positioning block (33). The riveting seat (31) can rise or fall. The riveting post (32) is installed in the riveting seat (31) and an elastic element (311) is provided between the riveting post (32) and the riveting seat (31). The bottom end of the riveting post (32) can abut against the top surface of the cover plate (11). The docking positioning block (33) is fixed to the bottom end of the riveting seat (31) and is set opposite to the connecting end (111). There are at least two docking positioning blocks (33), and a docking guide surface (331) is provided on the side of the two docking positioning blocks (33) that are close to each other. The docking guide surface (331) can abut against the connecting end (111) to push the connecting end (111) to align with the connecting groove (121). In this process, the riveting seat (31) is pressed down, and a preset pre-tightening force is applied to the cover plate (11) through the riveting column (32). Then, under the premise of the preset pre-tightening force, the position of the connecting end (111) is adjusted by the docking positioning block (33). Finally, the riveting process is completed by pressing down through the riveting column (32).

2. The shunt coil riveting device according to claim 1, characterized in that, The positioning seat (2) has a positioning groove (21), which is closed on three sides and open on one side (211). The trip unit (1) can enter and exit the positioning groove (21) through the opening (211).

3. The shunt coil riveting device according to claim 2, characterized in that, The positioning seat (2) is detachably connected to the limiting seat (4) on the side away from the opening (211). The limiting seat (4) has an L-shaped vertical section. One end of the limiting seat (4) faces the opening (211). The top surface of the limiting seat (4) can abut against the bottom surface of the riveting seat (31). The limiting seat (4) has a clearance hole (41) for the riveting post (32) to pass through. A clearance space (42) is formed between the limiting seat (4) and the U-shaped frame (12).

4. The shunt coil riveting device according to claim 2, characterized in that, It also includes a linear module (5), the positioning seat (2) is installed at the output end of the linear module (5), and the direct module is used to drive the positioning seat (2) to move closer to or away from the riveting assembly (3) along the direction of the opening (211).

5. A shunt coil riveting device according to claim 2, characterized in that, The side of the positioning groove (21) that is in contact with the U-shaped frame (12) is provided with an elastic pad (6).

6. The shunt coil riveting device according to claim 2, characterized in that, The U-shaped frame (12) includes a limiting part (122) near the opening (211), and the positioning seat (2) is provided with a limiting structure (7) on the side away from the opening (211). The limiting structure (7) and the limiting part (122) together restrict the position of the cover plate (11).

7. A shunt coil riveting device according to claim 6, characterized in that, The limiting structure (7) includes a limiting block (71) fixed on the positioning seat (2). The limiting block (71) is provided with a limiting surface (711) that cooperates with the limiting part (122). The limiting surface (711) is used to abut against the cover plate (11).

8. A shunt coil riveting device according to claim 2, characterized in that, The positioning seat (2) has cooling components (8) on the top surfaces of both sides near the opening (211). The cooling components (8) have air outlets (81) facing the area of ​​the connecting groove (121). The cooling components (8) are used to spray cooling airflow into the area of ​​the connecting groove (121) before the connecting end (111) is riveted to the connecting groove (121), so that the connecting groove (121) expands due to cooling and contraction.

9. A shunt coil riveting device according to claim 8, characterized in that, The cooling assembly (8) includes a cooling pipe (82) connected to the air outlet (81) and a solenoid valve (83) for controlling the opening and closing of the cooling pipe (82); the solenoid valve (83) is used to connect to an external cooling air source.

10. A shunt coil riveting device according to claim 9, characterized in that, The cooling pipe (82) is located inside the positioning seat (2).

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