A wiring structure

Abstract

The application relates to the technical field of electrical connection devices, in particular to a wiring structure. The wiring structure comprises a wiring part, a wiring terminal, a conductive rod and a fastening structure. The wiring part is provided with a first contact surface and a first pin hole, the wiring terminal comprises a first wiring plate and a second wiring plate, the first wiring plate is provided with a corresponding second contact surface and a second pin hole, and the second wiring plate is provided with a wiring hole in the vertical direction to realize wiring direction conversion. The structure forms a double-insurance electrical connection path through the planar contact of the first contact surface and the second contact surface and the plug-in contact of the conductive rod and the first pin hole and the second pin hole, significantly improves the stability of current transmission and reduces the contact resistance. The structure overcomes the limitation of single wiring direction of the straight-out type structure and is superior to the existing rotary wiring structure in terms of electrical connection reliability.

Description

Technical Field

[0001] This application relates to the field of electrical connection device technology, and more particularly to a wiring structure. Background Technology

[0002] Currently, fixed-frame circuit breakers are mainly divided into two types: direct-out wiring structure and rotary wiring structure. The direct-out structure limits the user's wiring methods, supporting only horizontal wiring and not suitable for vertically oriented terminal blocks. While existing rotary terminal blocks can meet both horizontal and vertical wiring requirements, the electrical connection performance between them and the circuit breaker wiring parts largely depends on the flatness of the contact surfaces. Poor flatness of the contact surfaces will lead to decreased conductivity, affecting the reliability and safety of the connection. Utility Model Content

[0003] This application provides a wiring structure that can change the wiring direction of the wiring part and has good electrical conductivity.

[0004] The technical solution proposed in this application is as follows: The wiring structure provided in this application includes a wiring section, wiring terminals, conductive rods, and fastening structure.

[0005] Along the first direction, one end of the wiring portion is provided with a first contact surface and a first pin hole with its axis parallel to the first direction. The first direction is the length direction of the wiring portion.

[0006] Along the first direction, a terminal block is located at one end of the wiring portion where a first contact surface is provided. The terminal block includes a first terminal board and a second terminal board. A second contact surface is provided on one side of the first terminal board, and a second pin hole with its axis parallel to the first direction is provided. The second contact surface faces the first contact surface, and the second pin hole faces the first pin hole. The second terminal board is connected to the side of the first terminal board away from the first contact surface, and a wiring hole with its axis parallel to the second direction is provided. The second direction is perpendicular to the first direction and is the width direction of the wiring portion.

[0007] A portion of the conductive rod's conductive section is inserted into the first pin hole, with its side contacting the hole wall. Another portion of the conductive rod's conductive section is inserted into the second pin hole, with its side contacting the hole wall. The first contact surface and the second contact surface are in contact and pre-tightened by a fastening structure.

[0008] Based on the wiring structure provided in this application, the wiring structure consists of four core components: a wiring section, terminals, conductive rods, and a fastening structure. Through the contact between the conductive rod and the wiring section and terminals, and the contact between the first contact surface and the second contact surface, a "double-safety" electrical connection is achieved between the wiring section and terminals, thereby establishing a low-resistance, highly stable current path. Furthermore, it allows for changing the wiring direction after the terminals and wiring section are fixed. This effectively overcomes the limitations of direct-output wiring structures and offers better electrical connection reliability compared to existing rotary wiring structures.

[0009] In one possible design, the wiring section is part of the stationary contact of the circuit breaker.

[0010] Based on the wiring structure provided by this embodiment, the wiring direction of the stationary contact can be changed. This allows the stationary contact, which could previously only be wired horizontally, to be fixedly connected to a vertically arranged terminal block. Furthermore, in this embodiment, the stationary contact and the terminal block not only form a main conductive path through the first and second contact surfaces, but also, through the large-area contact between the side of the conductive rod and the sidewalls of the first and second pin holes, form a parallel auxiliary conductive path, thereby significantly improving the electrical conductivity of the stationary contact.

[0011] In one possible design, the wiring section is part of the moving busbar of the circuit breaker moving contact assembly.

[0012] Based on the wiring structure provided by this embodiment, the wiring direction of the moving busbar can be changed. This allows the moving busbar, which could previously only be wired horizontally, to be fixedly connected to a vertically positioned terminal block. Furthermore, in this embodiment, the moving busbar and the terminal block not only form a main conductive path through the first and second contact surfaces, but also, through the large-area contact between the conductive rod and the first and second pin holes, constitute a parallel auxiliary conductive path, thereby significantly improving the overall electrical conductivity.

[0013] In one possible design, the fastening structure includes a screw, a first mounting hole, and a second mounting hole.

[0014] The first mounting hole is located at the end of the wiring section near the first terminal block, and the second mounting hole is located at the end of the first terminal block near the wiring section. The first mounting hole and the second mounting hole are coaxial, and their axes are both parallel to the first direction.

[0015] The wiring section and the wiring terminal are fastened together by screws inserted into the first mounting hole and the second mounting hole.

[0016] Based on the wiring structure provided by this embodiment, the first mounting hole and the second mounting hole are coaxial and their axes are parallel to the first direction. This ensures that the tightening force of the screw is applied along the predetermined axial direction, efficiently converting the clamping force of the screw into a perpendicular clamping force between the first contact surface and the second contact surface. In this way, the effective contact area between the first contact surface and the second contact surface can be maximized, reducing the influence of microscopic unevenness and oxide layer on the contact surface, thereby directly improving the conductivity.

[0017] In one possible design, there are two screws, and there are also two first mounting holes and two second mounting holes.

[0018] Along the second direction, two first mounting holes are provided on both sides of the first pin hole, and two second mounting holes are provided on both sides of the second pin hole.

[0019] The wiring section and the wiring terminal are fastened together by screws inserted into the corresponding first mounting holes and second mounting holes.

[0020] Based on the wiring structure provided by this embodiment, the conductive rod provides a central positioning point, and the screws on both sides provide symmetrical clamping forces. When the screws are tightened, the pressure applied between the first contact surface and the second contact surface is uniform and balanced, which can avoid the "seesaw" effect that may be caused by a single screw, improve the fit between the first contact surface and the second contact surface, and thus improve the conductivity.

[0021] In one possible design, the first mounting hole is a threaded hole, and the second mounting hole is a smooth hole, with the diameter of the second mounting hole being larger than the diameter of the screw shank.

[0022] Based on the wiring structure provided by this embodiment, the inner diameter of the second mounting hole is larger than the diameter of the screw shank. This ensures that the screw does not engage with the terminal thread during tightening, but rather acts as a pull rod, drawing the terminal towards the wiring section. The thread preload is converted into axial clamping force, acting on the first and second contact surfaces. This avoids lateral forces caused by misalignment of the threads, reduces abnormal wear, deformation, or improper installation of the terminal, and facilitates uniform clamping between the first and second contact surfaces.

[0023] In one possible design, the conductive rod is interference-fitted with both the first and second pin holes.

[0024] Based on the wiring structure provided by this embodiment, the interference fit forces the conductive rod to generate huge contact pressure between the hole walls of the first pin hole and the second pin hole, forming a large area of ​​metal plastic deformation, making the connection between the conductive rod and the wiring part and the terminal more tight. This helps to reduce contact resistance, thereby reducing heat generation and helping to improve the rated current carrying capacity and energy efficiency of the entire wiring structure.

[0025] In one possible design, along the first direction, the length of the conductive rod is less than the sum of the depths of the first pin hole and the second pin hole.

[0026] Based on the wiring structure provided by this embodiment, when the wiring part and the wiring terminal are tightened by the screws on both sides, the first contact surface and the second contact surface can be fastened to the predetermined position without being blocked by the excessive length of the conductive rod. This allows most of the preload of the screws to be effectively applied between the first contact surface and the second contact surface, ensuring the electrical contact performance between the first contact surface and the second contact surface.

[0027] In one possible design, the first and second pin holes are cylindrical holes, and the conductive rod is cylindrical in shape.

[0028] Based on the wiring structure provided by this embodiment, the contact pressure and interference stress generated when the cylindrical rod is pressed into the circular hole are evenly distributed. This uniformity ensures consistent resistance and uniform current distribution across the entire circumference, avoiding localized overheating.

[0029] In one possible design, there are four wiring holes arranged in a rectangular pattern.

[0030] Based on the wiring structure provided by this embodiment, when the external vertical wiring bar is connected to these four wiring holes by multiple bolts, the rectangular layout can provide uniform clamping force and form a large and stable support surface, which is beneficial to improving the working reliability of the wiring structure. Attached Figure Description

[0031] Figure 1 A schematic diagram of a wiring structure provided for the prior art.

[0032] Figure 2 This is a schematic diagram of a wiring structure provided in an embodiment of this application.

[0033] Figure 3 for Figure 2 A schematic diagram of the structure of the central wiring section.

[0034] Figure 4 for Figure 2 A schematic diagram of the structure of the middle terminal block.

[0035] Figure 5 This is a structural schematic diagram of a fixed frame circuit breaker.

[0036] Figure 6 for Figure 2 The wiring structure shown is a schematic diagram from another perspective.

[0037] The reference numerals in the prior art are: 21', wiring section; 22', terminal block; 211', first threaded fixing hole; 221', second threaded fixing hole.

[0038] The reference numerals in the embodiments of this application are as follows: 1. Wiring structure; 11. Wiring part; 111. First contact surface; 112. First pin hole; 113. First mounting hole; 12. Terminal block; 121. First terminal block; 1211. Second contact surface; 1212. Second pin hole; 1213. Second mounting hole; 122. Second terminal block; 1221. Wiring hole; 13. Conductive rod; 14. Fastening structure; 141. Screw; 3. Frame-type circuit breaker; 31. Stationary contact; 32. Moving contact; 33. Moving busbar; D1, First Direction; D2, Second Direction; D3, Third Direction. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion.

[0041] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by spacers, screws, bolts, or other spacers. A physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] The present application will be described in detail below with reference to the accompanying drawings.

[0045] Figure 1 Please refer to the schematic diagram of a moving contact wiring structure provided in the prior art. Figure 1 The wiring portion 21' is generally rectangular, and the terminal block 22' is also rectangular. The wiring portion 21' has a first threaded fixing hole 211' in the thickness direction, and the terminal block 22' has a second threaded fixing hole 221' in the thickness direction that matches the first threaded fixing hole 211'. The wiring portion 21' and the terminal block 22' are fixedly connected by threaded fasteners passing through the first threaded fixing hole 211' and the second threaded fixing hole 221'. During connection, the surfaces that contact each other are the surfaces determined by their respective length and width directions. In this way, the wiring portion 21' and the terminal block 22' can have a large contact surface, which is beneficial for current transmission. If the terminal block 22' is orthogonal to the wiring portion 21', there is not enough contact surface between them, making it difficult to achieve electrical connection.

[0046] Existing rotary terminal blocks, located at one end of the wiring section 21' along its length, are used to change the wiring direction, enabling orthogonal wiring between the wiring section 21' and the terminal block. However, when the rotary terminal block is connected to the wiring section 21', the electrical connection performance between them largely depends on the flatness of their contact surfaces. Poor flatness of the contact surfaces will lead to decreased conductivity, affecting the reliability and safety of the connection.

[0047] Based on this, this application provides a wiring structure. Figure 2 This is a schematic diagram of a wiring structure provided in an embodiment of this application. Figure 3 for Figure 2 Schematic diagram of the central wiring section. Figure 4 for Figure 2 A structural diagram of the middle terminal block. Please refer to... Figures 2 to 4 The wiring structure 1 provided in this application includes a wiring portion 11, a wiring terminal 12, a conductive rod 13, and a fastening structure 14. Along the first direction D1, one end of the wiring portion 11 is provided with a first contact surface 111, and also with a first pin hole 112 whose axis is parallel to the first direction D1. The first direction D1 is the length direction of the wiring portion 11.

[0048] Along the first direction D1, the terminal 12 is located at one end of the wiring portion 11 where the first contact surface 111 is provided. The terminal 12 includes a first terminal block 121 and a second terminal block 122. The first terminal block 121 has a second contact surface 1211 on one side of the first direction D1, and a second pin hole 1212 with its axis parallel to the first direction D1. The second contact surface 1211 is directly opposite the first contact surface 111, and the second pin hole 1212 is directly opposite the first pin hole 112.

[0049] The second terminal block 122 is connected to the side of the first terminal block 121 away from the first contact surface 111, and is provided with a wiring hole 1221 with its axis parallel to the second direction D2. The second direction D2 is the width direction of the wiring portion 11.

[0050] A portion of the conductive section of the conductive rod 13 is inserted into the first pin hole 112, and its side surface contacts the wall of the first pin hole 112. Another portion of the conductive section of the conductive rod 13 is inserted into the second pin hole 1212, and its side surface contacts the wall of the second pin hole 1212. The first contact surface 111 contacts the second contact surface 1211 and is pre-tightened by the fastening structure 14.

[0051] Please continue to refer to this. Figure 2 In general, the wiring structure 1 consists of four core components: a wiring section 11, a terminal block 12, a conductive rod 13, and a fastening structure 14. Through the contact between the conductive rod 13 and the wiring section 11 and the terminal block 12, and the contact between the first contact surface 111 and the second contact surface 1211, a "double-safety" electrical connection is achieved between the wiring section 11 and the terminal block 12. This establishes a low-resistance, highly stable current path and allows the wiring direction to be changed after the terminal block 12 is fixed to the wiring section 11.

[0052] Please combine Figure 2 and Figure 4 The terminal block 12 of this application includes a first terminal block 121. The first terminal block 121 is provided with a second contact surface 1211 that is adapted to the first contact surface 111. When the wiring part 11 and the terminal block 12 are assembled, the first contact surface 111 and the second contact surface 1211 are pre-tightened by the fastening structure 14. In this way, the electrical connection between the wiring part 11 and the terminal block 12 can be realized.

[0053] The terminal block 12 of this application also includes a second terminal block 122. The second terminal block 122 is connected to the side of the first terminal block 121 away from the first contact surface 111, and is provided with a wiring hole 1221 with its axis parallel to the second direction D2. The second direction D2 is the width direction of the wiring portion 11. Thus, when the terminal block 12 is connected to the terminal block, the contact surface between the terminal block and the second terminal block 122 is parallel to the plane determined by the first direction D1 and the third direction D3. The second terminal block 122 and the terminal block achieve large-plane contact in the second direction D2 and are fixedly connected by fasteners adapted to the wiring hole 1221 provided in the second direction D2, wherein the third direction D3 is the thickness direction of the wiring portion 11.

[0054] Thus, in the wiring structure 1 of this application, the wiring direction of the wiring section 11 is changed from the thickness direction to the width direction through the conversion of the wiring terminal 12, thereby realizing the change of wiring direction. If the wiring section 11 is set horizontally, then the terminal block can be placed vertically. If the wiring section 11 is set vertically, the terminal block can be set horizontally.

[0055] In addition, please continue to refer to Figure 2 , Figure 3 and Figure 4 In this application, the wiring structure 1 further includes a conductive rod 13. One end of the wiring portion 11, where a first contact surface 111 is provided, has a first pin hole 112. A second contact surface 1211 has a second pin hole 1212 directly opposite the first pin hole 112. A portion of the conductive rod 13 is inserted into the first pin hole 112, and its side surface contacts the wall of the first pin hole 112. Another portion of the conductive rod 13 is inserted into the second pin hole 1212, and its side surface contacts the wall of the second pin hole 1212. Thus, electrical conduction between the wiring portion 11 and the terminal 12 relies not only on the contact between the first contact surface 111 and the second contact surface 1211, but also on the side surface of the conductive rod 13. This improves the reliability of the electrical connection between the wiring portion 11 and the terminal 12.

[0056] Finally, the wiring structure 1 of this application also includes a fastening structure 14. The fastening structure 14 is mainly used to overcome the electro-repulsive force between the first contact surface 111 and the second contact surface 1211 when energized, and to force the first contact surface 111 and the second contact surface 1211 to fit tightly together through a pre-tightening force. This helps to reduce the contact resistance between the first contact surface 111 and the second contact surface 1211, reduce heat generation, and improve electrical connection performance.

[0057] In summary, based on the wiring structure 1 provided in this application, although there is still a flatness requirement between the first contact surface 111 and the second contact surface 1211, the introduction of the conductive rod 13 as a parallel conductive path reduces the sensitivity of the electrical connection reliability between the wiring part 11 and the terminal 12 to the absolute flatness between the two contact surfaces. Even if there is slight unevenness between the first contact surface 111 and the second contact surface 1211, the current can still be effectively transmitted through the conductive rod 13, and the electrical connection performance of the wiring structure 1 is more guaranteed.

[0058] In one application scenario, wiring structure 1 can be used for wiring the stationary contacts in a frame-type circuit breaker. For details, please refer to... Figure 5 , Figure 5 The diagram shown is a schematic of a fixed frame circuit breaker. Please refer to it. Figure 2 , Figure 3 and Figure 5 In a fixed-frame circuit breaker, the stationary contact 31 is horizontally positioned. Before adopting the wiring structure 1 of this application, the stationary contact 31 with stationary contact point 211 was located inside the circuit breaker housing, and the end of the stationary contact 31 used to connect to the terminal block extended directly out of the housing. The stationary contact 31 could only be electrically connected to the horizontally positioned terminal block. When the terminal block was vertically positioned, i.e., when the width and thickness of the terminal block were directly opposite the stationary contact 31, it was difficult for the stationary contact 31 to connect to the terminal block.

[0059] Based on this, in one embodiment of this application, the wiring portion 11 is part of the stationary contact 31 of the circuit breaker.

[0060] Please combine Figure 2 , Figure 3 and Figure 5 When the wiring structure 1 is used for wiring the stationary contact 31, the first contact surface 111 is the end face of the stationary contact 31 exposed above the circuit breaker housing. One end of the first contact surface 111 of the stationary contact 31 is also provided with a first pin hole 112 axially parallel to the first direction D1. The terminal block 12 is connected to the end of the stationary contact 31 where the first contact surface 111 is located. During assembly, a portion of the conductive section of the conductive rod 13 can be hammered into the first pin hole 112. Then, the second pin hole 1212 of the terminal block 12 is aligned with the conductive rod 13 for installation. Finally, a pre-tightening force is applied through the fastening structure 14 to bring the first contact surface 111 into contact with the second contact surface 1211. This allows for a change in the wiring direction of the stationary contact 31, enabling the stationary contact 31, which could originally only be wired horizontally, to be fixedly connected to a vertically arranged terminal block.

[0061] Furthermore, in this embodiment, the stationary contact 31 and the terminal 12 not only form a main conductive path through the first contact surface 111 and the second contact surface 1211, but also form a parallel auxiliary conductive path through the large-area contact between the side of the conductive rod 13 and the sidewalls of the first pin hole 112 and the second pin hole 1212, thereby significantly improving the electrical conductivity of the stationary contact 31.

[0062] Please combine Figure 1 and Figure 5 The moving contact assembly of the frame-type circuit breaker 3 includes a moving contact 32, a flexible connection structure, and a moving busbar 33. Both the moving contact 32 and the flexible connection structure are located within the circuit breaker housing. Along the first direction D1, one end of the moving busbar 33 is located within the circuit breaker housing and connected to the moving contact 32 via the flexible connection structure. The other end of the moving busbar 33 extends out of the housing for connecting to external terminal blocks. The moving busbar 33 is horizontally positioned and can only be electrically connected to horizontally positioned terminal blocks. When the terminal blocks are vertically positioned, it is difficult for the moving busbar 33 to connect to the terminal blocks.

[0063] Based on this, please combine Figure 1 , Figure 2 and Figure 5 In one embodiment of this application, the wiring portion 11 is part of the moving busbar 33 of the circuit breaker moving contact 32 assembly.

[0064] Specifically, when the moving busbar 33 adopts the wiring structure 1 provided in this application, the portion of the moving busbar 33 exposed above the circuit breaker housing can be shortened. The end face of the moving busbar 33 exposed above the housing can be considered as the first contact surface 111, and a first pin hole 112 is provided therein. The axial direction of the first pin hole 112 is parallel to the first direction D1. The terminal block 12 is connected to one end of the moving busbar 33 exposed above the housing. During assembly, a portion of the conductive section of the conductive rod 13 can be hammered into the first pin hole 112. Then, the second pin hole 1212 of the terminal block 12 is aligned with the conductive rod 13 for installation. Finally, a pre-tightening force is applied by fasteners to bring the first contact surface 111 into contact with the second contact surface 1211. In this way, the wiring direction of the moving busbar 33 can be changed. This allows the moving busbar 33, which could originally only be wired horizontally, to be fixedly connected to a vertically arranged terminal block.

[0065] Similarly, the moving busbar 33 and the terminal block 12 not only form a main conductive path through the first contact surface 111 and the second contact surface 1211, but also form a parallel auxiliary conductive path through the large-area contact between the conductive rod 13 and the first pin hole 112 and the second pin hole 1212, thereby significantly improving the electrical conductivity of the moving contact 32.

[0066] It should be noted that, in Figure 5In the structure shown, the wiring of the stationary contact portion adopts the wiring structure provided in this application, while the moving busbar 33 remains a straight-out structure. This contrast illustrates the change in wiring direction achieved by the wiring structure of this application. In practical applications, the moving busbar 33 portion can use the same wiring structure as the stationary contact portion.

[0067] It should also be noted that the wiring structure of this application can be used not only for wiring the stationary and moving contact assemblies in circuit breakers, but also for other electrical appliances with similar requirements, such as disconnect switches, contactors, frequency converters, inverters, etc.

[0068] Please continue to refer to this. Figures 2 to 4 In one embodiment of this application, the fastening structure 14 includes a screw 141, a first mounting hole 113 and a second mounting hole 1213.

[0069] A first mounting hole 113 is provided at one end of the wiring portion 11 near the first terminal block 121, and a second mounting hole 1213 is provided at one end of the first terminal block 121 near the wiring portion 11. The first mounting hole 113 and the second mounting hole 1213 are coaxial, and their axes are both parallel to the first direction D1. The wiring portion 11 and the terminal block 12 are fastened together by screws 141 that are inserted into the first mounting hole 113 and the second mounting hole 1213.

[0070] Specifically, in this embodiment, the first mounting hole 113 and the second mounting hole 1213 are coaxial and their axes are parallel to the first direction D1. This ensures that the tightening force of the screw 141 is applied along the predetermined axial direction, efficiently converting the clamping force of the screw 141 into a perpendicular pressing force between the first contact surface 111 and the second contact surface 1211. This maximizes the effective contact area between the first contact surface 111 and the second contact surface 1211, reducing the influence of microscopic unevenness and oxide layers on the contact surfaces, thereby directly improving conductivity.

[0071] Figure 6 for Figure 2 The diagram shows the wiring structure from another perspective. Please refer to... Figure 3 , Figure 4 and Figure 6 In one embodiment of this application, there are two screws 141, and there are also two first mounting holes 113 and two second mounting holes 1213.

[0072] Along the second direction D2, two first mounting holes 113 are provided on both sides of the first pin hole 112, and two second mounting holes 1213 are provided on both sides of the second pin hole 1212.

[0073] The wiring part 11 and the wiring terminal 12 are fastened together by screws 141 that are inserted into the corresponding first mounting hole 113 and second mounting hole 1213.

[0074] Based on the wiring structure 1 provided in this embodiment, the conductive rod 13 and the screws 141 on both sides form a three-point positioning system. The conductive rod 13 provides a central positioning point, and the screws 141 on both sides provide symmetrical clamping forces. When the screws 141 are tightened, the pressure applied between the first contact surface 111 and the second contact surface 1211 is uniform and balanced, which can avoid the "seesaw" effect that may be caused by a single screw 141, improve the fit between the first contact surface 111 and the second contact surface 1211, and thus improve the conductivity.

[0075] In addition, the double screws 141 create a stable, high-pressure mechanical environment, which also provides mechanical assurance for the effective cooperation between the conductive rod 13 and the first pin hole 112 and the second pin hole 1212.

[0076] Please continue to refer to this. Figures 2 to 4 In one embodiment of this application, the first mounting hole 113 is a threaded hole, the second mounting hole 1213 is a smooth hole, and the diameter of the second mounting hole 1213 is larger than the diameter of the screw rod.

[0077] In this embodiment, the inner diameter of the second mounting hole 1213 is larger than the diameter of the screw shank. This ensures that the screw 141 does not engage with the terminal 12 during tightening, but instead acts as a pull rod, drawing the terminal 12 toward the wiring portion 11. The thread preload is converted into axial clamping force, acting on the first contact surface 111 and the second contact surface 1211. This avoids lateral forces caused by misalignment of the threads, reduces abnormal wear, deformation, or improper installation of the terminal 12, and facilitates uniform clamping of the first contact surface 111 and the second contact surface 1211.

[0078] In addition, the inner diameter of the second mounting hole 1213 is larger than the diameter of the screw shank, which helps to compensate for unavoidable dimensional tolerances in the manufacturing and assembly of the parts, and ensures that the first contact surface 111 and the second contact surface 1211 can be better self-aligned.

[0079] In this way, during assembly, the operator only needs to pass the screw 141 through the hole from one side of the terminal 12, then screw it into the threaded hole of the wiring part 11 and tighten it, which is convenient for assembly. If the first mounting hole 113 and the second mounting hole 1213 are both threaded holes, extremely high hole alignment accuracy is required, and the assembly difficulty and cost will increase significantly.

[0080] Please continue to refer to this. Figures 2 to 4 In one embodiment of this application, the conductive rod 13 is interference-fitted with the first pin hole 112 and the second pin hole 1212.

[0081] Specifically, when the conductive rod 13 is interference-fitted with the first pin hole 112 and the second pin hole 1212, the wiring part 11, the conductive rod 13, and the wiring terminal 12 form an integral structure. This enhances the mechanical stability of the entire wiring structure 1 and helps the wiring structure 1 withstand greater bending moments and shear forces. It is particularly suitable for harsh working conditions that require the connection of heavy busbars or may be subject to external mechanical stress.

[0082] In addition, the interference fit forces the conductive rod 13 to generate huge contact pressure between the hole walls of the first pin hole 112 and the second pin hole 1212, forming a large area of ​​metal plastic deformation, making the connection between the conductive rod 13 and the wiring part 11 and the wiring terminal 12 tighter. This helps to reduce contact resistance, thereby reducing heat generation and helping to improve the rated current carrying capacity and energy efficiency of the entire wiring structure 1.

[0083] Please continue to refer to this. Figures 2 to 4 In one embodiment of this application, along the first direction D1, the length of the conductive rod 13 is less than the sum of the depths of the first pin hole 112 and the second pin hole 1212.

[0084] In this way, when the wiring part 11 and the wiring terminal 12 are tightened by the screws 141 on both sides, the first contact surface 111 and the second contact surface 1211 can be fastened to the predetermined position without being blocked by the excessive length of the conductive rod 13. This allows most of the preload of the screws 141 to be effectively applied between the first contact surface 111 and the second contact surface 1211, ensuring the electrical contact performance between the first contact surface 111 and the second contact surface 1211.

[0085] Please continue to refer to this. Figures 2 to 4 In one embodiment of this application, the first pin hole 112 and the second pin hole 1212 are cylindrical holes, and the conductive rod 13 is cylindrical in shape.

[0086] Specifically, in this embodiment, the cylindrical conductive rod 13 mates with the cylindrical first pin hole 112 and the second pin hole 1212. When the cylindrical rod is pressed into the circular hole, the resulting contact pressure and interference stress are uniformly distributed. This uniformity ensures consistent resistance and uniform current distribution across the entire circumference, preventing localized overheating. Furthermore, the uniform radial pressure provides a symmetrical clamping force, making the conductive rod 13 less prone to loosening. In addition, it avoids stress concentration at sharp corners caused by non-cylindrical shapes, preventing damage to the hole wall or the conductive rod 13 itself.

[0087] From an assembly perspective, the cylinder is a rotationally symmetric body with no directionality. During assembly, the operator does not need to concern themselves with the angle or direction of the conductive rod 13; it can be rotated and inserted arbitrarily. This reduces the difficulty of operation and the probability of errors, thereby improving assembly efficiency.

[0088] From a manufacturing perspective, the cylindrical first pin hole 112, second pin hole 1212, and conductive rod 13 are easy to process and manufacture.

[0089] Please continue to refer to this. Figure 2 and Figure 4 In one embodiment of this application, the number of wiring holes 1221 is four, and the four wiring holes 1221 are arranged in a rectangular shape.

[0090] Based on the wiring structure 1 provided in this embodiment, when the external vertically arranged terminal block is connected to the four terminal holes 1221 by multiple bolts, the rectangular layout can provide uniform clamping force and form a large and stable support surface. This layout can effectively resist the bending moment and torsional force generated by the external terminal block due to its own weight or electromagnetic force, prevent it from generating unbalanced forces on the terminal 12, and help improve the working reliability of the wiring structure 1.

[0091] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0092] The above-described embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. 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 of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A wiring structure, characterized in that, Includes wiring section, wiring terminals, conductive rods and fastening structure; Along the first direction, one end of the wiring portion is provided with a first contact surface and a first pin hole with its axis parallel to the first direction; the first direction is the length direction of the wiring portion. Along the first direction, the terminal block is located at one end of the wiring portion where a first contact surface is provided. The terminal block includes a first wiring plate and a second wiring plate. A second contact surface is provided on one side of the first wiring plate, and a second pin hole with an axis parallel to the first direction is provided. The second contact surface faces the first contact surface, and the second pin hole faces the first pin hole. The second wiring plate is connected to the side of the first wiring plate away from the first contact surface, and a wiring hole with an axis parallel to the second direction is provided. The second direction is perpendicular to the first direction, and the second direction is the width direction of the wiring portion. A portion of the conductive section of the conductive rod is inserted into the first pin hole, and its side surface contacts the wall of the first pin hole; another portion of the conductive section of the conductive rod is inserted into the second pin hole, and its side surface contacts the wall of the second pin hole; the first contact surface contacts the second contact surface, and is pre-tightened by the fastening structure.

2. The wiring structure according to claim 1, characterized in that, The connection section is part of the stationary contact of the circuit breaker.

3. The wiring structure according to claim 1, characterized in that, The wiring section is part of the moving busbar of the moving contact assembly of the circuit breaker.

4. The wiring structure according to claim 1, 2, or 3, characterized in that, The fastening structure includes a screw, a first mounting hole, and a second mounting hole; The first mounting hole is located at one end of the wiring portion near the first wiring board, and the second mounting hole is located at one end of the first wiring board near the wiring portion; the first mounting hole and the second mounting hole are coaxial, and their axes are both parallel to the first direction; The wiring section and the wiring terminal are fastened together by screws inserted into the first mounting hole and the second mounting hole.

5. The wiring structure according to claim 4, characterized in that, The number of screws is two, and the number of the first mounting hole and the number of the second mounting hole are also two; Along the second direction, two first mounting holes are provided on both sides of the first pin hole, and two second mounting holes are provided on both sides of the second pin hole; The wiring section and the wiring terminal are fastened together by screws inserted into the corresponding first mounting holes and second mounting holes.

6. The wiring structure according to claim 4, characterized in that, The first mounting hole is a threaded hole, and the second mounting hole is a smooth hole. The diameter of the second mounting hole is larger than the diameter of the screw rod.

7. The wiring structure according to claim 1, 2, or 3, characterized in that, The conductive rod is interference-fitted with the first pin hole and the second pin hole.

8. The wiring structure according to claim 1, 2, or 3, characterized in that, Along the first direction, the length of the conductive rod is less than the sum of the depths of the first pin hole and the second pin hole.

9. The wiring structure according to claim 1, 2, or 3, characterized in that, The first and second pin holes are cylindrical holes, and the conductive rod is cylindrical in shape.

10. The wiring structure according to claim 1, 2, or 3, characterized in that, The number of wiring holes is four, and the four wiring holes are arranged in a rectangular shape.

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