Tandem module with expansion function and distribution box
By using the plug-in and bolt-fixing design of the junction module, the problem of cumbersome expansion of junction components in the existing technology is solved, and efficient and neat wiring expansion is achieved to meet the expansion needs of factory equipment.
Patent Information
- Application Number
- CN202423202988.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Expanding existing junction boxes requires cumbersome installation procedures, which affects production efficiency, increases the number of cables, and leads to a messy layout, making it difficult to meet the wiring needs of the ever-expanding factory equipment.
The system employs a hub module with expansion capabilities. Through the plug-in design of the first and second hub modules, and the use of bolts for fixing, a stable connection between the modules is achieved. The modules are also rationally arranged in three-dimensional space, reducing the need for additional connecting wires and providing a multi-level expansion structure.
It simplifies the expansion process of the junction box, improves work efficiency, maintains a neat cable layout, adapts to changes in factory equipment scale, and reduces expansion difficulty and cost.
Smart Images
Figure CN223843346U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of busbar technology, and in particular to a busbar module and distribution box with expansion function. Background Technology
[0002] In large factory workshops, there are numerous production equipment, such as machine tools, motors, and automated production lines. These devices include both three-phase and single-phase equipment. Neutral wire junction boxes are used to balance the current of the three-phase loads, ensuring the normal operation of the equipment. For example, when equipment on different phases frequently starts and stops, causing an imbalance in the three-phase current, the neutral wire junction box can guide the unbalanced current back to the neutral point. Simultaneously, ground wire junction boxes are used to connect the metal casings of all equipment for grounding protection. In the event of a leakage current, the leakage current can be quickly conducted to the ground through the ground wire junction box, protecting the safety of the operators.
[0003] As factories expand, more equipment is added, requiring additional wiring positions for junction boxes. However, existing junction box technology often necessitates finding an expansion location within the existing distribution box, installing the new junction box, and then connecting it to the bus or existing junction box. This involves numerous steps, including disconnecting other wiring during installation to prevent interference with other circuits, severely impacting the factory's production process. It also increases the number of cables in the distribution box due to the additional wires used for electrical connections. Some manufacturers opt for direct soldering to install the new junction box, but this method is also relatively cumbersome and reduces work efficiency. Summary of the Invention
[0004] In order to overcome the shortcomings of low working efficiency of adding new junction components in the prior art, this application provides a junction module with expansion function, which can realize convenient expansion of the junction module.
[0005] To achieve the above objectives, this application adopts the following technical solution: a junction module with expansion function, comprising a first junction module and a second junction module. The first junction module includes a first housing with a first mating surface, and the first housing has an input terminal, a first output terminal and a first expansion output terminal disposed on the first mating surface that are electrically connected to each other. The second junction module includes a second housing with a second mating surface, and a second output terminal and a first expansion input terminal disposed on the second housing that are electrically connected to each other. The first expansion output terminal and the first expansion input terminal are adapted to each other so that when the first mating surface and the second mating surface are mated, the first expansion output terminal and the first expansion input terminal are plugged into each other to form an electrical connection.
[0006] After adopting the above technical solution, this application has the following advantages: When it is necessary to add wiring positions on the basis of the original junction module, that is, to expand the junction function, it is not necessary to painstakingly find expansion positions in the distribution box as in the existing technology, and then perform complicated installation and bus connection or connection with the original junction components. Simply plug the second junction module into the first expansion output terminal of the first junction module through its first expansion input terminal to quickly achieve electrical connection and complete the expansion of the junction module. The operation is simple and convenient, which greatly improves the working efficiency of expanding the junction components. Moreover, the traditional method of adding junction components often results in more wires for electrical connection, which increases the number of cables in the distribution box, making the cable layout more messy and increasing the difficulty of subsequent maintenance. However, this application reduces the use of additional connecting wires by directly plugging the modules together, making the number of cables in the distribution box relatively controllable, which helps to maintain the neatness of the cable layout and facilitates subsequent maintenance and repair of cables and junction modules.
[0007] Furthermore, the second connector module also includes a third bonding surface away from the second bonding surface. The third bonding surface is provided with a second expansion output end adapted to the first expansion input end, so that when the second bonding surface of the other second connector module is bonded to the third bonding surface, the first expansion input end and the second expansion output end of the other second connector module are plugged into each other to generate an electrical connection.
[0008] By adopting the aforementioned technical solution, and by setting a third bonding surface and a corresponding second expansion output terminal on the second junction module, it is possible to achieve sequential connection between multiple second junction modules. For example, when a factory continuously adds production equipment and needs to continuously expand the wiring positions of the junction components, the first second junction module can be plugged into the first junction module for expansion, and subsequent other second junction modules can be sequentially plugged into the previously connected second junction modules through the bonding surface, forming a chain-like multi-level expansion structure. This can meet the needs of factories of different sizes and development stages for a large number of expansion wirings of junction modules, adapting to more complex and varied practical application scenarios.
[0009] Furthermore, the first mating surface is provided with a first screw hole, and the second housing is provided with a first through hole aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole to connect with the first screw hole, the second housing and the first housing are fixed to each other.
[0010] By adopting the aforementioned technical solution, and by setting a first screw hole and a first through hole aligned with it, and using bolts for fixing, the first junction module and the second junction module not only achieve electrical connection through plugging in the expansion output terminal and the expansion input terminal, but also increase the stability of the mechanical connection, thus ensuring the safety of the production environment.
[0011] Furthermore, the second junction module also includes a third bonding surface away from the second bonding surface. The third bonding surface is provided with a second extended output terminal. The second extended output terminal and the first extended input terminal are offset in the left-right direction and intersected in the front-back direction. The junction module also includes a third junction module. The third junction module includes a third housing with a fourth bonding surface, and a third output terminal electrically connected to each other on the third housing and a second extended input terminal provided on the fourth bonding surface. The second extended input terminal and the second extended output terminal are adapted to each other so that when the third bonding surface and the fourth bonding surface are bonded, the second extended output terminal and the second extended input terminal are plugged into each other to form an electrical connection.
[0012] By adopting the aforementioned technical solution, the staggered expansion interface design allows the junction module to make full use of three-dimensional space when making expansion connections, so that each module can be reasonably arranged in different directions. This avoids the waste of space caused by excessive stacking or extension of modules in the same plane. Therefore, making use of space at the expansion end with the highest thickness requirement helps to reduce the thickness of the second junction module, so that the space inside the distribution box can be fully utilized.
[0013] Furthermore, the third housing includes a fifth bonding surface away from the fourth bonding surface. A third extended output terminal is provided on the fifth bonding surface. The third extended output terminal and the second extended input terminal are offset in the left-right direction and intersect in the front-back direction. The third extended output terminal is aligned with the first extended output terminal in the left-right direction so that when the second bonding surface and the fifth bonding surface of the other second junction module are bonded, the other first extended input terminal and the third extended output terminal are plugged into each other to generate an electrical connection.
[0014] By adopting the aforementioned technical solution, and by setting the first expansion input terminal on the second junction module and the third expansion output terminal of the third junction module to be plugged into each other to form an electrical connection, it means that alternating connection between the second junction module and the third junction module can be realized. Furthermore, since the third expansion output terminal and the second expansion input terminal of the third junction module are staggered in the left-right direction and intersected in the front-back direction, the thickness of the third junction module is also reduced. This allows the second and third junction modules to maintain expandability while further reducing the thickness of the expansion modules, enabling this junction module to have good expandability even in miniaturized distribution boxes.
[0015] Furthermore, the first mating surface is provided with a first screw hole, and the second housing is provided with a first through hole aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole to connect to the first screw hole, the second housing and the first housing are fixed to each other. The third mating surface is provided with a second screw hole, and the first screw hole and the second screw hole are offset in the left-right direction. The third housing is provided with a second through hole aligned with the second screw hole in the left-right direction, so that when the bolt passes through the second through hole to connect to the second screw hole, the third housing and the second housing are fixed to each other. The fifth mating surface is provided with a third screw hole, and the third screw hole is aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole of another second junction module to connect to the third screw hole, the other second housing and the third housing are fixed to each other.
[0016] By adopting the aforementioned technical solution, corresponding screw holes and aligned through holes are set on each mating surface, and bolts are used to fix them to adjacent junction modules. This not only achieves electrical connection between different junction modules, but also further strengthens the stability of mechanical connection. Furthermore, by staggering the screw holes on adjacent housings, each pair of housings is fixed with one bolt, avoiding the need for extended custom bolts when expanding multiple junction modules. This reduces the difficulty of expansion and the cost required to expand new junction modules.
[0017] Furthermore, movable blocking plates are provided at the first expansion output terminal, the second expansion output terminal, and the third expansion output terminal, so that the expansion output terminal is exposed when the blocking plate is removed from its original position.
[0018] By employing the aforementioned technical solution, movable baffles are installed at the first, second, and third expansion output terminals to effectively prevent external impurities such as dust, moisture, and oil from entering these ports. When expansion is needed, the baffles can be removed to expose the expansion output terminals for the expansion of new junction modules, increasing ease of use and tidiness.
[0019] Furthermore, the first expansion output terminal, the second expansion output terminal, and the third expansion output terminal are sockets, and the first expansion input terminal and the second expansion input terminal are plugs.
[0020] By adopting the aforementioned technical solution, the first, second, and third expansion output terminals are configured as sockets, while the corresponding first and second expansion input terminals are configured as plugs, making the connection and expansion operations between modules more convenient. When it is necessary to expand the junction module and add new junction modules, the operator only needs to align the plug with the socket and gently insert it to quickly achieve electrical connection. The entire process does not require complex tools or tedious wiring operations, greatly improving the working efficiency of expanding the junction module. This convenience is particularly evident in application scenarios that require frequent adjustments and expansions of junction functions, such as large factory workshops that are constantly updating equipment.
[0021] A distribution box includes the above-mentioned junction module, a guide rail is installed inside the distribution box, a box core assembly is installed on the guide rail, and the junction module and the box core assembly are installed side by side on the guide rail.
[0022] By adopting the aforementioned technical solution, the existing space within the distribution box is fully utilized by installing the junction module and the box core assembly side-by-side on the existing guide rail. This side-by-side installation method avoids wasted space between components, allowing the junction module and the box core assembly to be compactly and orderly placed inside the box. It also provides relatively sufficient space for other necessary electrical components inside the box, contributing to the efficient use of the internal space of the distribution box and making the overall layout of the distribution box more reasonable and orderly.
[0023] Furthermore, the output terminals of the core assembly and the output terminals of the junction module face the same direction.
[0024] Using the aforementioned technical solution, the output terminals of the box core assembly and the output terminals of the junction module face the same direction, which makes subsequent wiring and cabling work in the distribution box more convenient. Electricians can orderly lead out the wires in a uniform direction, reducing bends and crossings in the wiring. Attached Figure Description
[0025] The following description, in conjunction with the accompanying drawings, further illustrates this application:
[0026] Figure 1 This is a front assembly diagram of the first junction module and the second junction module of this application;
[0027] Figure 2 This is an exploded view of the first junction module;
[0028] Figure 3 This is an exploded view of the second junction module;
[0029] Figure 4 A schematic diagram of the rear assembly of the first junction module and the second junction module;
[0030] Figure 5This is a front assembly diagram of the first junction module, the second junction module, and the third junction module;
[0031] Figure 6 A schematic diagram of the rear assembly of the first junction module, the second junction module, and the third junction module;
[0032] Figure 7 This is an exploded view of the third junction module;
[0033] Figure 8 This is an assembly diagram of a distribution box;
[0034] Figure 9 This is a schematic diagram of the first extended input terminal and the second extended output terminal.
[0035] Figure Descriptions: 1. First junction module; 11. First housing; 111. First mating surface; 12. First output terminal; 13. First extended output terminal; 14. Input terminal; 15. First screw hole; 2. Second junction module; 21. Second housing; 211. Second mating surface; 212. Third mating surface; 22. Second output terminal; 23. Second extended output terminal; 24. First extended input terminal; 25. Second screw hole; 26. First through hole; 3. Third junction module; 31. Third housing; 311. Fourth mating surface; 312. Fifth mating surface; 32. Third output terminal; 33. Third extended output terminal; 34. Second extended input terminal; 35. Third screw hole; 36. Second through hole; 4. Blocking plate; 5. Distribution box; 6. Guide rail; 7. Box core assembly. Detailed Implementation
[0036] 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, and not all embodiments.
[0037] The terms "first," "second," etc. (if present) in the specification and claims of this application are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this application, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this application, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.
[0038] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.
[0039] Example 1:
[0040] like Figures 1 to 4 As shown, this application provides a junction module with expansion function, including a first junction module 1 and a second junction module 2. The first junction module 1 includes a first housing 11 with a first mating surface 111. The first housing 11 has an input terminal 14, a first output terminal 12 and a first expansion output terminal 13 disposed on the first mating surface 111 that are electrically connected to each other. The second junction module 2 includes a second housing 21 with a second mating surface 211, a second output terminal 22 and a first expansion input terminal 24 disposed on the second mating surface 211 that are electrically connected to each other. The first expansion output terminal 13 and the first expansion input terminal 24 are adapted to each other so that when the first mating surface 111 and the second mating surface 211 are mated, the first expansion output terminal 13 and the first expansion input terminal 24 are plugged into each other to form an electrical connection.
[0041] After adopting the above technical solution, this application has the following advantages: When it is necessary to add wiring positions on the basis of the original junction module, that is, to expand the junction function, it is not necessary to painstakingly find expansion positions in the distribution box as in the existing technology, and then carry out complicated installation and bus connection or connection with the original junction components. Simply plug the second junction module 2 into the first expansion output terminal 13 of the first junction module 1 through its first expansion input terminal 24 to quickly realize electrical connection and complete the expansion of the junction module. The operation is simple and convenient, which greatly improves the working efficiency of expanding the junction components. Moreover, the traditional method of adding junction components often results in more wires for electrical connection, which increases the number of cables in the distribution box, making the cable layout more messy and increasing the difficulty of subsequent maintenance. However, this application reduces the use of additional connecting wires by directly plugging the modules together, making the number of cables in the distribution box relatively controllable, which helps to maintain the neatness of the cable layout and facilitates subsequent maintenance and repair of cables and junction modules.
[0042] Preferably, the outer casing of the junction module is made of insulating material.
[0043] Furthermore, the second junction module 2 also includes a third bonding surface 212 away from the second bonding surface 211. The third bonding surface 212 is provided with a second expansion output terminal 23 adapted to the first expansion input terminal 24, so that when the second bonding surface 211 of the other second junction module 2 is bonded to the third bonding surface 212, the first expansion input terminal 24 and the second expansion output terminal 23 of the other second junction module 2 are plugged into each other to form an electrical connection.
[0044] By adopting the aforementioned technical solution, and by setting a third mating surface 212 and a corresponding second expansion output terminal 23 on the second junction module 2, it means that multiple second junction modules 2 can be sequentially connected. For example, when a factory continuously adds production equipment and needs to continuously expand the wiring positions of the junction components, the first second junction module 2 can be plugged into the first junction module 1 for expansion, and subsequent other second junction modules 2 can be sequentially plugged into the previously connected second junction modules 2 through the mating surface, forming a chain-like multi-level expansion structure. This can meet the needs of factories of different sizes and development stages for a large number of expansion wirings of junction modules, adapting to more complex and varied practical application scenarios.
[0045] Furthermore, the first mating surface 111 is provided with a first screw hole 15, and the second housing 21 is provided with a first through hole 26 aligned with the first screw hole 15 in the left-right direction, so that when the bolt passes through the first through hole 26 to connect the first screw hole 15, the second housing 21 and the first housing 11 are fixed to each other.
[0046] By adopting the aforementioned technical solution, by setting the first screw hole 15 and the first through hole 26 aligned therewith, and fixing it with bolts, the first junction module 1 and the second junction module 2 not only achieve electrical connection through plugging the extended output end and the extended input end, but also increase the stability of the mechanical connection, ensuring the safety of the production environment.
[0047] Specifically, the second extended output terminal 23 and the first extended input terminal 24 are aligned in the left-right direction to reduce the complexity of internal components.
[0048] Example 2:
[0049] like Figures 5 to 7 and Figure 9 As shown, the difference from Embodiment 1 is that the second extended output terminal 23 and the first extended input terminal 24 are offset in the left-right direction and intersect in the front-back direction. The junction module also includes a third junction module 3. The third junction module 3 includes a third housing 31 with a fourth mating surface 311, a third output terminal 32 electrically connected to each other on the third housing 31, and a second extended input terminal 34 provided on the fourth mating surface 311. The second extended input terminal 34 and the second extended output terminal 23 are adapted to each other so that when the third mating surface 212 and the fourth mating surface 311 are mated, the second extended output terminal 23 and the second extended input terminal 34 are plugged into each other to form an electrical connection.
[0050] By adopting the aforementioned technical solution, due to the staggered expansion interface design, the junction module can make full use of the three-dimensional space when making expansion connections, so that each module can be reasonably arranged in different directions, avoiding the waste of space caused by excessive stacking or extension of modules in the same plane. Therefore, space utilization at the expansion end with the highest thickness requirement is beneficial to reduce the thickness of the second junction module 2, so that the space in the distribution box can be fully utilized.
[0051] Furthermore, the third housing 31 includes a fifth bonding surface 312 away from the fourth bonding surface 311. The fifth bonding surface 312 is provided with a third extended output terminal 33. The third extended output terminal 33 and the second extended input terminal 34 are offset in the left-right direction and intersect in the front-back direction. The third extended output terminal 33 is aligned with the first extended output terminal 13 in the left-right direction, so that when the second bonding surface 211 of the other second junction module 2 and the fifth bonding surface 312 are bonded, the other first extended input terminal 24 and the third extended output terminal 33 are plugged into each other to form an electrical connection.
[0052] By adopting the aforementioned technical solution, the first expansion input terminal 24 on the second junction module 2 and the third expansion output terminal 33 of the third junction module 3 are connected to each other to form an electrical connection. This means that alternating connections between the second junction module 2 and the third junction module 3 can be achieved. Furthermore, since the third expansion output terminal 33 and the second expansion input terminal 34 of the third junction module 3 are staggered in the left-right direction and intersected in the front-back direction, the thickness of the third junction module 3 is also reduced. This allows the second junction module 2 and the third junction module 3 to maintain expandability while further reducing the thickness of the expansion modules, enabling this junction module to have good expandability even in miniaturized distribution boxes.
[0053] Furthermore, the first mating surface 111 is provided with a first screw hole 15, and the second housing 21 is provided with a first through hole 26 aligned with the first screw hole 15 in the left-right direction, so that when the bolt passes through the first through hole 26 to connect to the first screw hole 15, the second housing 21 and the first housing 11 are fixed to each other. The third mating surface 212 is provided with a second screw hole 25, and the first screw hole 15 and the second screw hole 25 are offset in the left-right direction. The third housing 31 is provided with a second through hole 36 aligned with the second screw hole 25 in the left-right direction, so that when the bolt passes through the second through hole 36 to connect to the second screw hole 25, the third housing 31 and the second housing 21 are fixed to each other. The fifth mating surface 312 is provided with a third screw hole 35, and the third screw hole 35 and the first screw hole 15 are aligned in the left-right direction, so that when the bolt passes through the first through hole 26 of another second junction module 2 to connect to the third screw hole 35, the other second housing 21 and the third housing 31 are fixed to each other.
[0054] By adopting the aforementioned technical solution, corresponding screw holes and aligned through holes are set on each mating surface, and bolts are used to fix them to adjacent junction modules. This not only achieves electrical connection between different junction modules, but also further strengthens the stability of mechanical connection. Furthermore, by staggering the screw holes on adjacent housings, each pair of housings is fixed with one bolt, avoiding the need for extended custom bolts when expanding multiple junction modules. This reduces the difficulty of expansion and the cost required to expand new junction modules.
[0055] Furthermore, movable blocking plates 4 are provided at the first extended output terminal 13, the second extended output terminal 23, and the third extended output terminal 33, so that the extended output terminal is exposed when the blocking plate 4 is removed from its original position.
[0056] By adopting the aforementioned technical solution, movable blocking plates 4 are provided at the first expansion output terminal 13, the second expansion output terminal 23, and the third expansion output terminal 33, which can effectively prevent external impurities such as dust, moisture, and oil from entering the interior of these ports. When expansion is needed, the blocking plates 4 can be removed to expose the expansion output terminals for the expansion of new junction modules, increasing ease of use and neatness.
[0057] Specifically, the blocking plate 4 can be removed as a whole, with the connection between the blocking plate 4 and the housing similar to the gate of a plastic injection molded part, or it can be flipped over, simply to expose the extended output end.
[0058] Furthermore, the first expansion output terminal 13, the second expansion output terminal 23, and the third expansion output terminal 33 are sockets, and the first expansion input terminal 24 and the second expansion input terminal 34 are plugs.
[0059] By adopting the aforementioned technical solution, the first expansion output terminal 13, the second expansion output terminal 23, and the third expansion output terminal 33 are configured as sockets, while the corresponding first expansion input terminal 24 and second expansion input terminal 34 are configured as plugs, making the connection and expansion operations between modules more convenient. When it is necessary to expand the junction module and add new junction modules, the operator only needs to align the plug with the socket and gently insert it to quickly achieve electrical connection. The entire process does not require complicated tools or tedious wiring operations, which greatly improves the working efficiency of expanding the junction module. This convenience is even more evident in application scenarios that require frequent adjustments and expansion of junction functions, such as large factory workshops that are constantly updating equipment.
[0060] In another embodiment, such as Figure 8 As shown, a distribution box includes the above-mentioned junction module. A guide rail 6 is installed inside the distribution box 5, and a box core assembly 7 is installed on the guide rail 6. The junction module and the box core assembly 7 are installed side by side on the guide rail 6.
[0061] By adopting the aforementioned technical solution, the existing space within the distribution box 5 is fully utilized by installing the junction module and the box core assembly 7 side by side on the existing guide rail 6. This side-by-side installation method avoids wasting space between components, allowing the junction module and the box core assembly 7 to be placed compactly and orderly inside the box. It also provides relatively sufficient space for other necessary electrical components inside the box, which helps to achieve efficient utilization of the internal space of the distribution box 5 and makes the layout of the entire distribution box 5 more reasonable and orderly.
[0062] Furthermore, the output terminals of the core assembly 7 and the output terminals of the junction module face the same direction.
[0063] By adopting the aforementioned technical solution, the output terminals of the box core assembly 7 and the output terminals of the junction module face the same direction, which makes subsequent wiring and cabling work in the distribution box 5 more convenient. Electricians can orderly lead out the wires in a uniform direction, reducing bends and crossings in the wiring.
[0064] In addition to the preferred embodiments described above, this application has other implementation methods. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection claimed in this application.
Claims
1. A junction module with expansion capabilities, characterized in that, The system includes a first junction module and a second junction module. The first junction module includes a first housing with a first mating surface. The first housing has an input terminal, a first output terminal, and a first extended output terminal located on the first mating surface that are electrically connected to each other. The second junction module includes a second housing with a second mating surface, a second output terminal, and a first extended input terminal located on the second mating surface that are electrically connected to each other. The first extended output terminal and the first extended input terminal are adapted to each other so that when the first mating surface and the second mating surface are mated, the first extended output terminal and the first extended input terminal are plugged into each other to form an electrical connection.
2. The junction module with expansion function according to claim 1, characterized in that, The second connector module also includes a third bonding surface away from the second bonding surface. The third bonding surface is provided with a second expansion output end adapted to the first expansion input end, so that when the second bonding surface of the other second connector module is bonded to the third bonding surface, the first expansion input end and the second expansion output end of the other second connector module are plugged into each other to generate an electrical connection.
3. A junction module with expansion function according to claim 1, characterized in that, The first mating surface is provided with a first screw hole, and the second housing is provided with a first through hole aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole to connect with the first screw hole, the second housing and the first housing are fixed to each other.
4. A junction module with expansion function according to claim 1, characterized in that, The second junction module further includes a third bonding surface away from the second bonding surface. The third bonding surface is provided with a second extended output terminal. The second extended output terminal and the first extended input terminal are offset in the left-right direction and intersected in the front-back direction. The junction module further includes a third junction module. The third junction module includes a third housing with a fourth bonding surface, a third output terminal electrically connected to each other on the third housing, and a second extended input terminal provided on the fourth bonding surface. The second extended input terminal and the second extended output terminal are adapted to each other so that when the third bonding surface and the fourth bonding surface are bonded, the second extended output terminal and the second extended input terminal are plugged into each other to form an electrical connection.
5. A junction module with expansion function according to claim 4, characterized in that, The third housing includes a fifth bonding surface away from the fourth bonding surface. A third extended output terminal is provided on the fifth bonding surface. The third extended output terminal and the second extended input terminal are offset in the left-right direction and intersect in the front-back direction. The third extended output terminal is aligned with the first extended output terminal in the left-right direction so that when the second bonding surface of another second junction module and the fifth bonding surface are bonded, the other first extended input terminal and the third extended output terminal are plugged into each other to form an electrical connection.
6. A junction module with expansion function according to claim 5, characterized in that, The first mating surface is provided with a first screw hole, and the second housing is provided with a first through hole aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole to connect with the first screw hole, the second housing and the first housing are fixed to each other. The third mating surface is provided with a second screw hole, and the first screw hole and the second screw hole are offset in the left-right direction. The third housing is provided with a second through hole aligned with the second screw hole in the left-right direction, so that when the bolt passes through the second through hole to connect with the second screw hole, the third housing and the second housing are fixed to each other. The fifth mating surface is provided with a third screw hole, and the third screw hole is aligned with the first screw hole in the left-right direction, so that when the bolt passes through the first through hole of another second junction module to connect with the third screw hole, the other second housing and the third housing are fixed to each other.
7. A junction module with expansion function according to claim 5, characterized in that, The first expansion output terminal, the second expansion output terminal, and the third expansion output terminal are provided with movable blocking plates so that the expansion output terminal is exposed when the blocking plates are removed from their original positions.
8. A junction module with expansion function according to claim 5, characterized in that, The first expansion output terminal, the second expansion output terminal, and the third expansion output terminal are sockets, and the first expansion input terminal and the second expansion input terminal are plugs.
9. A distribution box, comprising a junction module according to any one of claims 1 to 8, characterized in that, The distribution box is equipped with a guide rail, on which a box core assembly is mounted. The junction module is mounted side by side with the box core assembly on the guide rail.
10. A distribution box according to claim 9, characterized in that, The output terminals of the core assembly and the output terminals of the junction module face the same direction.