Modular circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, and provides a modular circuit breaker, and the circuit breaker comprises an installation accommodation part which is provided with an installation accommodation space and a plugging fixing groove, and the plugging fixing groove is communicated with the installation accommodation space; the at least two contact boxes are positioned in the mounting accommodating space; and the connecting part is located in the installation containing space and arranged on the installation containing part, and the connecting part comprises a bottom connecting device and a side edge connecting device. According to the modular circuit breaker provided by the invention, the technical problems that the contact box and the mounting base body are tedious in disassembly and assembly operation and are easy to loosen and displace under a power operation condition, the stability of a conductive path is influenced, and the fault risk is increased in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and more particularly to a modular circuit breaker. Background Technology

[0002] With the increasing demands for power supply reliability and ease of operation and maintenance in power systems, modular circuit breakers have been widely used due to their advantages such as flexible assembly and convenient maintenance. Among them, the contact box, as a core conductive component, directly affects the operational stability of the circuit breaker due to its installation and fixing effect. However, the contact boxes of existing modular circuit breakers mostly adopt a single plug-in or simple bolt fixing method, which results in poor connection with the mounting base. Furthermore, under operating conditions such as vibration and electromagnetic force, the contact boxes are prone to loosening and displacement, which may lead to relative misalignment of the contact boxes and thus poor conductive contact. At the same time, the traditional fixing structure requires the use of multiple tools for disassembly and assembly, which is cumbersome and significantly increases the operation and maintenance time and cost, affecting the continuous and stable power supply of the power system. Summary of the Invention

[0003] This application provides a modular circuit breaker that can improve the technical problems in related technologies, such as cumbersome disassembly and assembly of the contact box and mounting base, easy loosening and displacement under power operation conditions, affecting the stability of the conductive path and increasing the risk of failure.

[0004] This application provides a modular circuit breaker, including: The mounting accommodating part has a mounting accommodating space and a plug-in fixing slot, wherein the plug-in fixing slot is connected to the mounting accommodating space; At least two contact boxes are located within the mounting and receiving space, and the contact boxes have conductive paths; and A connecting part is located within the mounting and accommodating space and disposed on the mounting and accommodating space. The connecting part includes a bottom connecting device and a side connecting device. The bottom connecting device is located within the mounting and accommodating space and disposed on the contact box. The side connecting device is located within the mounting and accommodating space and disposed on the contact box. The bottom connecting device is used to fix the contact box to the mounting and receiving part through the plug-in fixing groove, and the side connecting device is used to lock two adjacent contact boxes to each other.

[0005] The technical solutions described in this application embodiment have at least the following technical effects: The modular circuit breaker provided in this application embodiment, during the contact box assembly process, inserts the contact box into the insertion and removal fixing slot along the installation and receiving space. Simultaneously, the bottom connecting device at the bottom of the contact box enters the insertion and removal fixing slot. At this time, the side connecting device is in a locked state, and the side connecting devices of adjacent contact boxes are aligned. During the locking process, the bottom connecting device actuates and engages with the inner wall of the insertion and removal fixing slot, rigidly fixing the contact box to the installation and receiving part, and bearing axial vibration loads. Afterwards, the side connecting device actuates, locking the side connecting devices of adjacent contact boxes together, making the two adjacent contact boxes a single unit, achieving precise positioning of adjacent contact boxes and preventing relative displacement. The bottom fixing and side interlocking are achieved through the bottom connecting device and the side connecting device, thereby realizing a firm connection between the contact box and the mounting base (installation and receiving part), resisting the influence of vibration and electromagnetic forces. Simultaneously, locking adjacent contact boxes through the side connecting device eliminates the risk of poor contact caused by relative displacement, simplifies the contact box insertion and removal process, and improves the drawbacks of cumbersome disassembly and assembly in traditional fixing methods. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the structure of the modular circuit breaker provided in the embodiments of this application; Figure 2 A cross-sectional view of the modular circuit breaker provided in this application embodiment (the contact box and the mounting and receiving part are fixed). Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the connection portion provided in an embodiment of this application (the contact box and the mounting and receiving portion are not fixed); Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 4 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the structure when two adjacent side connection devices are interlocked.

[0008] The following are the labeling elements in the figure: 100. Modular circuit breaker; 10. Mounting housing; 11. Mounting space; 12. Plug-in fixing slot; 20. Contact box; 30. Connecting part; 31. Bottom connecting device; 311. Bottom connecting mechanism; 3111. Bottom connecting housing; 3112. Movable connecting part; 31121. Abutment slot; 31122. Transmission structure; 3113. Elastic element; 3114. Bottom abutment assembly; 31141. Bottom connecting wheel; 31142. Bottom connecting structure; 311421. Bottom limiting housing; 311422, Transmission wheel; 311423, Moving contact element; 312, Bottom fixing mechanism; 3121, Rotating fixing rod; 3122, Bottom fixing assembly; 31221, Bottom fixing plate; 31222, Bottom fixing wheel; 32, Side connecting device; 321, Side connecting mechanism; 3211, Side receiving element; 32111, Side receiving space; 32112, Sliding guide groove; 3212, Rotating locking element; 32121, Locking structure; 32122, Transmission groove; 322, Locking drive element. Detailed Implementation

[0009] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0010] 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 is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0011] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0012] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0013] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0014] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0015] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0016] With the increasing demands for power supply reliability and ease of operation and maintenance in power systems, modular circuit breakers have been widely used due to their advantages such as flexible assembly and convenient maintenance. Among them, the contact box, as a core conductive component, directly affects the operational stability of the circuit breaker due to its installation and fixing effect. However, the contact boxes of existing modular circuit breakers mostly adopt a single plug-in or simple bolt fixing method, which results in poor connection with the mounting base. Furthermore, under operating conditions such as vibration and electromagnetic force, the contact boxes are prone to loosening and displacement, which may lead to relative misalignment of the contact boxes and thus poor conductive contact. At the same time, the traditional fixing structure requires the use of multiple tools for disassembly and assembly, which is cumbersome and significantly increases the operation and maintenance time and cost, affecting the continuous and stable power supply of the power system.

[0017] Based on this, in order to improve the technical problems in related technologies such as the cumbersome disassembly and assembly of contact boxes and mounting bases, which are prone to loosening and displacement under power operation conditions, affecting the stability of the conductive path and increasing the risk of failure, the embodiments of this application provide the following solutions.

[0018] Please refer to the following: Figure 1 and Figure 2 This application provides a modular circuit breaker 100, which includes a mounting and receiving portion 10, at least two contact boxes 20, and a connecting portion 30.

[0019] The mounting and accommodating part 10 has a mounting and accommodating space 11 and a plug-in fixing groove 12, wherein the plug-in fixing groove 12 is connected to the mounting and accommodating space 11.

[0020] Two contact boxes 20 are located within the mounting and accommodating space 11, and the contact boxes 20 have conductive paths.

[0021] The connecting part 30 is located within the mounting and accommodating space 11 and is disposed on the mounting and accommodating part 10. The connecting part 30 includes a bottom connecting device 31 and a side connecting device 32. The bottom connecting device 31 is located within the mounting and accommodating space 11 and is disposed on the contact box 20. The side connecting device 32 is located within the mounting and accommodating space 11 and is disposed on the contact box 20.

[0022] The bottom connecting device 31 is used to fix the contact box 20 to the mounting and receiving part 10 through the plug-in fixing groove 12, and the side connecting device 32 is used to lock two adjacent contact boxes 20 to each other.

[0023] It is understood that the mounting and receiving portion 10 provides precise installation space and a fixing carrier for the contact box 20 and the connecting portion 30, and is the basis of the fixing structure. For example, the mounting and receiving portion 10 can be made of high-strength flame-retardant insulating material, aluminum alloy, etc., but is not limited to these. The plug-in fixing slot 12 can be a T-slot, dovetail slot, etc., but is not limited to these.

[0024] The contact box 20 is the core conductive component of the circuit breaker, responsible for the circuit conduction function. For example, the contact box 20 may include a box body (plastic box, fiberglass box, etc.), moving contacts (silver-based material, copper-based material, etc.) and stationary contacts (silver-based material, copper-based material, etc.). The box body may be mounted on the mounting and receiving part 10, and the moving and stationary contacts may be respectively mounted on the box body. When the moving contact and the stationary contact come into contact, a conductive path is formed to realize the circuit conduction function, etc., but not limited to this.

[0025] The bottom connecting device 31 is a device that can be installed at the bottom of the contact box 20 and cooperates with the insertion and fixing slot 12 of the mounting and receiving part 10. It is responsible for vertically fixing the contact box 20 in the mounting and receiving space 11 and preventing the contact box 20 from loosening vertically or shifting back and forth. For example, the bottom connecting device 31 can be a mounting plate (aluminum plate, plastic plate, etc.) with multiple screw holes. Each screw hole on the mounting plate corresponds one-to-one with each screw hole on the contact box 20 and the mounting and receiving part 10. The bottom connecting device 31 is fixed to the mounting and receiving part 10 and the contact box 20 simultaneously by screws or bolts. Alternatively, it can include a movable claw and a compression spring. The movable claw can be set on the contact box 20. The compression spring is used as a power source to drive the movable claw, which extends into the insertion and fixing slot 12, to open. The movable claw is fixed by engaging with the teeth of the insertion and fixing slot 12. However, it is not limited to these.

[0026] The side connection device 32 is a device that can be symmetrically installed on the left and right sides of the contact box 20. It is responsible for locking two adjacent contact boxes 20 together, preventing horizontal displacement between the contact boxes 20, and ensuring precise alignment of the conductive paths of each contact box 20. For example, the side connection device 32 may include a slot and a buckle, which are symmetrically arranged on the left and right sides of the contact box 20. The buckle is used to insert into the slot of another adjacent contact box 20 when the contact box 20 is inserted into the insertion and removal fixing slot 12 (interference fit). It may also include a hook band (covered with dense, hard micro hooks) and a wool band (covered with soft, fluffy fine loops of wool), which are symmetrically arranged on the left and right sides of the contact box 20. The hook band is used to align and press with the wool band of another adjacent contact box 20 when the contact box 20 is inserted into the insertion and removal fixing slot 12, so that the hooks on the hook band hook into and wrap around the loops of wool band, etc., but is not limited to these.

[0027] As can be seen from the above, in the modular circuit breaker 100 provided in this application embodiment, during the assembly of the contact box 20, the contact box 20 is inserted into the plug-in fixing slot 12 along the installation accommodating space 11, and the bottom connecting device 31 at the bottom of the contact box 20 simultaneously enters the plug-in fixing slot 12. At this time, the side connecting device 32 is in a locked state, and the side connecting devices 32 of adjacent contact boxes 20 are aligned. During the locking process, the bottom connecting device 31 moves and engages with the inner wall of the plug-in fixing slot 12, rigidly fixing the contact box 20 to the installation accommodating part 10 and bearing the axial vibration load. Afterward, the side connecting device 32 moves, locking the side connecting devices 32 of adjacent contact boxes 20 to each other, so that the two adjacent contact boxes 20 are as a whole, achieving precise positioning of adjacent contact boxes 20 and preventing relative displacement. The bottom connection device 31 and the side connection device 32 are used to fix the bottom and interlock the sides, thereby achieving a firm connection between the contact box 20 and the mounting base (mounting and receiving part 10), resisting the influence of vibration and electromagnetic force. At the same time, the side connection device 32 locks the adjacent contact boxes 20, eliminating the risk of poor contact caused by relative offset, simplifying the insertion and removal process of the contact box 20, and improving the drawbacks of the cumbersome disassembly and assembly of the traditional fixing method.

[0028] In some embodiments, please refer to the following: Figures 2 to 4 The bottom connecting device 31 includes at least two bottom connecting mechanisms 311 and a bottom fixing mechanism 312.

[0029] Two bottom connecting mechanisms 311 are disposed on the side of the contact box 20 near the plug-in fixing slot 12 and correspond one-to-one with the contact box 20. The bottom connecting mechanism 311 is used to move into the plug-in fixing slot 12 and fix it to the plug-in fixing slot 12 so that the contact box 20 is fixed to the mounting and receiving part 10.

[0030] The bottom fixing mechanism 312 is rotatably disposed on the mounting and receiving portion 10 and located in the plug-in fixing groove 12. The bottom fixing mechanism 312 is used to abut against the bottom connecting mechanism 311 located in the plug-in fixing groove 12, so as to further fix the bottom connecting mechanism 311 to the plug-in fixing groove 12.

[0031] It is understood that the bottom connecting mechanism 311 corresponds one-to-one with the contact box 20, and is used to simultaneously insert the contact box 20 into the insertion and fixing slot 12 when it is inserted into the installation and receiving space 11, and automatically fix it with the insertion and fixing slot 12 to complete the initial fixation. For example, the bottom connecting mechanism 311 can be a block structure made of plastic, which is fixed by interference fit with the insertion and removal fixing slot 12 when inserted into it. It can also include a movable claw and a compression spring. The movable claw can be set on the contact box 20. The compression spring is used as a power source to drive the movable claw, which extends into the insertion and removal fixing slot 12, to open. The movable claw is fixed by engaging with the teeth of the insertion and removal fixing slot 12. (When the contact box 20 is inserted, the inner wall of the insertion and removal fixing slot 12 squeezes the guide slope of the claw, forcing the claw compression spring to contract inward. When the contact box 20 is inserted into place, the claw automatically pops out under the action of the spring force and is locked into the slot on the inner wall of the insertion and removal fixing slot 12. The anti-slip teeth achieve initial fixation without additional operation.)

[0032] The bottom fixing mechanism 312 is a device that can abut against the bottom connecting mechanism 311 to achieve secondary reinforcement. For example, the bottom fixing mechanism 312 can be a double-acting cylinder, a servo motor, etc., but is not limited to these.

[0033] With this configuration, when the contact box 20 needs to be installed, the contact box 20 is inserted along the installation and receiving space 11, and the bottom connecting mechanism 311 is simultaneously inserted into the plug-in fixing slot 12. After the bottom connecting mechanism 311 is inserted into the bottom of the plug-in fixing slot 12, it automatically moves to initially fix itself to the plug-in fixing slot 12. Then, the bottom fixing mechanism 312 is driven to rotate, so that the bottom fixing mechanism 312 abuts against the bottom connecting mechanism 311 located in the plug-in fixing slot 12, so that the bottom connecting mechanism 311 is further pressed against the inner wall of the plug-in fixing slot 12, thereby improving the connection rigidity between the contact box 20 and the installation and receiving part 10. Compared with the traditional bolt fixing method, this can shorten the disassembly and assembly time and improve the operation and maintenance efficiency.

[0034] In some embodiments, please refer to the following: Figures 2 to 5 The bottom connecting mechanism 311 includes a bottom connecting receiver 3111, two movable connectors 3112, an elastic member 3113, and a bottom abutment assembly 3114.

[0035] The bottom connecting receiver 3111 is disposed on the side of the contact box 20 near the plug-in fixing slot 12, and has two movable slots, which are symmetrically distributed on the upper and lower sides of the bottom connecting receiver 3111.

[0036] Two movable connectors 3112 are respectively partially located in the two movable slots and have abutment slots 31121. The movable connectors 3112 can move along the movable slots and partially move into the plug-in fixing slot 12.

[0037] The two ends of the elastic element 3113 are respectively connected to the two movable connecting elements 3112.

[0038] The bottom abutment component 3114 is rotatably disposed on the bottom connecting receiver 3111 and located between the two movable connectors 3112.

[0039] The elastic element 3113 is used to drive the two movable connectors 3112 away from each other to abut against the inner wall of the plug-in fixing groove 12, thereby fixing the bottom connecting accommodating member 3111 to the mounting accommodating part 10 through the plug-in fixing groove 12. The movable connector 3112 is used to drive the bottom abutting assembly 3114 to rotate when moving. The bottom fixing mechanism 312 is used to partially move into the abutting slot 31121 and abut against the inner wall of the abutting slot 31121 to abut against the side of the movable connector 3112 located in the plug-in fixing groove 12 away from the contact box 20, and engage with the bottom abutting assembly 3114. When rotating, it drives the bottom abutting assembly 3114 to abut against the side of the two movable connectors 3112 close to the contact box 20.

[0040] It is understood that the bottom connecting receiver 3111 is the mounting base of the entire bottom connecting mechanism 311, providing precise installation and movement guidance for the movable connector 3112, the elastic element 3113, and the bottom abutment assembly 3114. For example, the bottom connecting receiver 3111 can be made of engineering plastic through one-piece injection molding, or it can be formed by milling aluminum alloy, etc., but is not limited to these.

[0041] Two movable connectors 3112 are symmetrically arranged in the movable slot, serving as both actuators that self-lock against the insertion and removal fixing slot 12 and linkage triggers that drive the bottom contact assembly 3114 to rotate. For example, the movable connectors 3112 can be made of wear-resistant plastic or stainless steel, and their structure can be L-shaped, with an inner rack structure that meshes with the bottom contact assembly 3114. The end of the movable connector 3112 away from the contact box 20 can have a trapezoidal structure that engages with the bottom of the insertion and removal fixing slot 12 (the trapezoidal structure engages with the insertion and removal fixing slot 12), but is not limited to this. As the two movable connectors 3112 approach each other, the bottom contact assembly 3114 increases the distance between itself and the two movable connectors 3112 by rotating, thus preventing the two movable connectors 3112 from contacting the bottom contact assembly 3114 during this process. When the two movable connectors 3112 approach each other, the distance between them is less than the width of the slot opening of the plug-in fixing groove 12, so that the two movable connectors 3112 can smoothly enter the plug-in fixing groove 12.

[0042] The elastic element 3113 provides a driving force that drives the two movable connectors 3112 away from each other, ensuring that the movable connectors 3112 stably abut against the inner wall of the insertion and removal fixing groove 12. For example, the elastic element 3113 can be a compression spring, a disc spring, etc., but is not limited to these.

[0043] The bottom abutment component 3114 is located between the two movable connectors 3112, receiving the moving power of the movable connectors 3112 and rotating them, and receiving the rotational power provided by the bottom fixing mechanism 312 to abut against the side of the two movable connectors 3112 near the contact box 20, thereby achieving secondary reinforcement of the movable connectors 3112. For example, the bottom abutment component 3114 may include a gear (spur gear, helical gear, etc.) and a rack (spur rack, helical rack, etc.), with the gear meshing with the rack. The gear may be rotatably mounted on the bottom connecting receiving member 3111 for meshing with the bottom fixing mechanism 312 to receive the rotational power provided by the bottom fixing mechanism 312 and rotate, thereby driving the rack to approach and abut against the movable connectors 3112, etc., but is not limited to this.

[0044] With this configuration, during installation, the contact box 20 is inserted into the installation receiving space 11, and the bottom connecting mechanism 311 enters the insertion and fixing slot 12 along with the contact box 20. The two movable connecting parts 3112 first contact the inner wall of the insertion and fixing slot 12, and under the squeezing action of the inner wall of the insertion and fixing slot 12 (or the external force provided by the user), the elastic element 3113 is compressed, causing the two movable connecting parts 3112 to move closer to each other while driving the bottom abutment assembly 3114 to rotate, increasing the distance between the bottom abutment assembly 3114 and the movable connecting parts 3112 (so that the movable connecting parts 3112 are inserted into the insertion and fixing slot 12). During the process, the two movable connectors 3112 do not come into contact with the bottom contact component 3114. When the two movable connectors 3112 come into contact with the bottom of the plug-in fixing groove 12, the elastic element 3113 drives the two movable connectors 3112 to move away from each other along the movable groove until the outer side contacts the inner wall of the plug-in fixing groove 12. The trapezoidal structure at the end of the movable connector 3112 away from the contact box 20 forms a preliminary self-lock with the plug-in fixing groove 12. At this time, the movement of the movable connector 3112 drives the bottom contact component 3114 to rotate to a preset angle (the length direction of the bottom contact component 3114 is parallel to the movement direction of the movable connector 3112). After the initial self-locking is completed, the bottom fixing mechanism 312 rotates (either manually driven by the user or driven by a drive motor located on the mounting and receiving part 10) and extends into the abutment slot 31121. The inner wall of the abutment slot 31121 restricts the movement of the movable connector 3112, while simultaneously driving the bottom abutment component 3114 to abut against the two movable connectors 3112, further making the movable connectors 3112 tightly adhere to the inner wall of the insertion and removal fixing slot 12, reducing the loose gap and forming a double constraint. If the movable connector 3112 is fixed to the insertion and fixing slot 12 by spring alone, under the influence of long-term vibration and alternating electromagnetic loads, the spring is prone to fatigue and relaxation, and the contact force gradually decreases, resulting in a gap between the movable connector 3112 and the slot wall. This can cause the contact box 20 to loosen and shift. Alternatively, the elastic deformation redundancy of the spring fixation can cause the contact gap between the movable connector 3112 and the slot wall to change with temperature, resulting in a slight relative shift of the contact box 20. However, through the above-mentioned double constraint, the bottom fixing mechanism 312 forms a rigid limit on the side of the movable connector 3112 away from the contact box 20 by engaging, and at the same time drives the bottom contact component 3114 to abut against the inside of the movable connector 3112, forming a double mechanical constraint of inner and outer limits. Even if the spring is slightly fatigued, the mechanical constraint can still firmly lock the position of the movable connector 3112.

[0045] In some embodiments, please refer to the following: Figures 2 to 5 The movable connector 3112 has a transmission structure 31122, and the bottom contact assembly 3114 includes a bottom connecting wheel 31141 and a bottom connecting structure 31142.

[0046] The bottom connecting wheel 31141 is rotatably mounted on the bottom connecting receiver 3111 for engaging with the transmission structure 31122.

[0047] The bottom connecting structure 31142 is disposed on the bottom connecting wheel 31141 and is used to engage with the bottom fixing mechanism 312.

[0048] The movable connector 3112 is used to drive the bottom connecting wheel 31141 to rotate during movement, thereby driving the bottom connecting structure 31142 to rotate. The bottom fixing mechanism 312 is used to drive the bottom connecting structure 31142 to abut against the two movable connectors 3112 on the side near the contact box 20 during rotation.

[0049] It can be understood that the transmission structure 31122 is the meshing interface between the movable connecting member 3112 and the bottom connecting wheel 31141, and is responsible for converting the linear movement of the movable connecting member 3112 into the rotational power of the bottom connecting wheel 31141. For example, the transmission structure 31122 can be a spur rack, a helical rack, etc., but is not limited to these.

[0050] The bottom connecting wheel 31141 is the intermediate hub connecting the transmission structure 31122 and the bottom connecting structure 31142. It is responsible for converting the linear motion of the transmission structure 31122 into rotational motion and transmitting it to the bottom connecting structure 31142. For example, the bottom connecting wheel 31141 can be a nylon meshing gear, a stainless steel wear-resistant gear, etc., but is not limited to these.

[0051] The bottom connecting structure 31142 is responsible for engaging with the bottom fixing mechanism 312 and abutting against the inner side of the movable connecting member 3112 to reduce residual clearance. For example, the bottom connecting structure 31142 can be a double-acting cylinder, or it can include a gear (spur gear, helical gear, etc.) and a rack (spur rack, helical rack, etc.). The gear and rack mesh with each other. The gear can be rotatably mounted on the bottom connecting wheel 31141 for engaging with the bottom fixing mechanism 312 to receive the rotational power provided by the bottom fixing mechanism 312 and rotate, thereby driving the rack to approach and abut against the movable connecting member 3112, etc., but is not limited to this.

[0052] With this configuration, during the insertion of the contact box 20 into the plug-in fixing slot 12, the elastic element 3113 is compressed by the two movable connecting parts 3112. As the two movable connecting parts 3112 approach each other, the transmission structure 31122 drives the bottom connecting wheel 31141 to rotate, thereby causing the bottom connecting structure 31142 to rotate so that the bottom connecting structure 31142 does not come into contact with the movable connecting parts 3112, thus avoiding mechanical collision or jamming between the bottom connecting structure 31142 and the movable connecting parts 3112. When the movable connecting parts 3112 touch the bottom of the plug-in fixing slot 12, the elastic element 3113 drives the two movable connecting parts 3112 to move away from each other, thereby causing the transmission structure 31122 to drive the bottom connecting structure 31142 to rotate and reset. When the bottom fixing mechanism 312 rotates, it provides power to the bottom connecting structure 31142 so that the bottom connecting structure 31142 touches the two movable connecting parts 3112, thereby achieving further fixation.

[0053] In some embodiments, please refer to the following: Figures 2 to 5 The bottom connection structure 31142 includes a bottom limiting and receiving member 311421, a transmission wheel 311422, and two movable abutment members 311423.

[0054] The bottom limiting and receiving component 311421 is disposed on the bottom connecting wheel 31141, and has a rotating receiving space and two limiting and moving grooves, the two limiting and moving grooves being respectively connected to the rotating receiving space.

[0055] The transmission wheel 311422 is rotatably mounted on the bottom limiting and receiving member 311421 for engaging with the bottom fixing mechanism 312.

[0056] Two movable abutments 311423 are respectively located in the two limiting moving grooves and mesh with the transmission wheel 311422. The movable abutments 311423 can move along the limiting moving grooves.

[0057] The bottom fixing mechanism 312 is used to drive the transmission wheel 311422 to rotate during rotation, thereby driving the two movable contact members 311423 to move to abut against the two movable connecting members 3112 on the side near the contact box 20.

[0058] It is understood that the bottom limiting receiver 311421 provides precise installation space and motion guidance for the drive wheel 311422 and the moving contact member 311423. For example, the bottom limiting receiver 311421 may be a box-shaped structure made of fiberglass or aluminum alloy, but is not limited to these.

[0059] The transmission wheel 311422 receives the rotational power from the bottom fixing mechanism 312 and drives the two moving contact members 311423 to move synchronously. For example, the transmission wheel 311422 may be a spur gear, a helical gear, etc., but is not limited to these.

[0060] The movable abutment 311423 is symmetrically arranged in the limiting movement groove and is an actuating component that directly abuts against the inner side of the movable connecting member 3112. For example, the movable abutment 311423 can be a straight toothed rack, a helical toothed rack, etc., but is not limited to these.

[0061] With this configuration, during the secondary locking process, the bottom fixing mechanism 312 rotates and engages with the transmission wheel 311422, driving the transmission wheel 311422 to rotate. The transmission wheel 311422, through gear engagement, drives two movable abutment members 311423 to extend synchronously along the limiting movement groove to abut against the inner side of the movable connector 3112, thereby reducing the residual gap between the movable connector 3112 and the plug-in fixing groove 12 and achieving rigid reinforcement. During the unlocking process, by rotating the bottom fixing mechanism 312 in the opposite direction, the transmission wheel 311422 rotates in the opposite direction, simultaneously driving the two movable abutment members 311423 to retract synchronously into the limiting movement groove, disengaging from contact with the movable connector 3112. At this time, the contact box 20 can be easily pulled out of the plug-in fixing groove 12 by manually pressing the movable connector 3112 to bring them closer together.

[0062] In some embodiments, please refer to the following: Figures 2 to 5 The bottom fixing mechanism 312 includes a rotating fixing rod 3121 and at least two bottom fixing components 3122.

[0063] The rotating fixing rod 3121 is rotatably disposed on the mounting receiving part 10 and located in the plug-in fixing groove 12.

[0064] The bottom fixing component 3122 has a movable hole that cooperates with the rotating fixing rod 3121, allowing the bottom fixing component 3122 to be movably disposed on the rotating fixing rod 3121 along the axial direction of the rotating fixing rod 3121. The bottom fixing component 3122 is used to partially move into the abutment slot 31121 to abut against the side of the movable connector 3112 located in the plug-in fixing slot 12 away from the contact box 20, and engage with the bottom abutment component 3114. When rotating, the bottom abutment component 3114 is driven to abut against the side of the two movable connectors 3112 close to the contact box 20.

[0065] It is understood that the rotating fixing rod 3121 is responsible for transmitting rotational power and providing precise axial guidance for the bottom fixing assembly 3122. For example, the rotating fixing rod 3121 can be a stainless steel smooth shaft, a threaded drive rod, etc., but is not limited to these.

[0066] The bottom fixing component 3122 corresponds one-to-one with the contact box 20, and is used to realize the dual functions of outer contact limit and inner engagement drive. It is the actuator that realizes bidirectional rigid constraint. For example, the bottom fixing component 3122 can be a servo motor, a double-acting cylinder, etc., but is not limited to these.

[0067] With this configuration, when the contact box 20 is inserted into the installation and receiving space 11, the movable connecting member 3112 of the bottom connecting mechanism 311 moves outward under the drive of the elastic member 3113 and abuts against the inner wall of the insertion and removal fixing groove 12 to complete the initial self-locking, the rotating fixing rod 3121 is in the initial position, the bottom fixing component 3122 does not abut against the abutting slot 31121 of the movable connecting member 3112, and the bottom fixing component 3122 meshes with the bottom abutting component 3114 (transmission wheel 311422). During the bidirectional rigid reinforcement stage, the rotating drive rotating fixing rod 3121 drives all bottom fixing components 3122 to rotate synchronously along the rod axis, so that the bottom fixing components 3122 are embedded in the abutment slot 31121 of the movable connector 3112, limiting the movable connector 3112 from the outside, and driving the meshing transmission wheel 311422 to rotate, thereby driving the moving abutment 311423 to press against the movable connector 3112 from the inside, further reducing the residual gap between the movable connector 3112 and the insertion fixing slot 12, forming a bidirectional rigid constraint.

[0068] In some embodiments, please refer to the following: Figures 2 to 5 The bottom fixing component 3122 includes a bottom fixing plate 31221 and a bottom fixing wheel 31222.

[0069] The bottom fixing plate 31221 is movably disposed on the rotating fixing rod 3121 along the axial direction of the rotating fixing rod 3121, and has the moving hole. The bottom fixing plate 31221 is used to partially move into the abutment slot 31121 to abut against the side of the movable connector 3112 located in the plug-in fixing slot 12 away from the contact box 20.

[0070] The bottom fixing wheel 31222 is movably disposed on the rotating fixing rod 3121 along the axial direction of the rotating fixing rod 3121, and has the moving hole. The bottom fixing wheel 31222 is used to engage with the bottom abutment assembly 3114, and drives the bottom abutment assembly 3114 to abut against the two movable connecting members 3112 when rotating.

[0071] It is understood that the bottom fixing plate 31221 is responsible for embedding into the abutment slot 31121 and abutting the movable connector 3112 on the side away from the contact box 20, preventing it from retracting and loosening. For example, the bottom fixing plate 31221 can be an engineering plastic plate, a stainless steel plate, etc., but is not limited to these. The bottom fixing plate 31221 and the bottom fixing wheel 31222 can move axially along the rotating fixing rod 3121, so that the bottom fixing plate 31221 and the bottom fixing wheel 31222 can be adapted to contact boxes 20 of different specifications.

[0072] The bottom fixed wheel 31222 is responsible for meshing with the transmission wheel 311422 and driving the transmission wheel 311422 to rotate through rotational power, thereby driving the moving contact member 311423 to press against the inner side of the movable connecting member 3112 and reduce the residual clearance. For example, the bottom fixed wheel 31222 can be a spur gear, a helical gear, etc., but is not limited to these.

[0073] With this configuration, when the movable connector 3112 abuts against the bottom of the insertion and removal fixing slot 12, the movable connector 3112 moves outward under the drive of the elastic member 3113. At this time, the bottom fixing plate 31221 and the bottom fixing wheel 31222 are in the initial position (the bottom fixing plate 31221 does not contact the movable connector 3112, and the bottom fixing wheel 31222 meshes with the transmission wheel 311422). After the initial locking is completed by abutting against the inner wall of the insertion and removal fixing slot 12, the rotating fixing rod 3121 is rotated by the user manually or by the servo motor, so that the bottom fixing plate 31221 is inserted into the abutting slot 31121 of the movable connector 3112. Furthermore, the rotation of the bottom fixing wheel 31222 drives the transmission wheel 311422 to rotate, thereby driving the movable abutting member 311423 to extend and abut against the movable connector 3112.

[0074] In some embodiments, please refer to the following: Figure 4 , Figure 6 Figure 7 The side connection device 32 includes at least two side connection mechanisms 321 and a locking drive 322.

[0075] Two side connection mechanisms 321 are symmetrically arranged on the left and right sides of the contact box 20, respectively. The side connection mechanism 321 is used to cooperate with the adjacent side connection mechanism 321 located on another contact box 20 to lock the two adjacent contact boxes 20 together.

[0076] The locking drive 322 is detachably mounted on the side connection device 32 and is used to rotate to drive the side connection devices 32 located on two adjacent and different contact boxes 20 to lock each other.

[0077] It is understood that the side connection mechanism 321 is the core component for achieving horizontal interlocking between adjacent contact boxes 20, forming a rigid connection through cooperation with the side connection mechanism 321 of the opposite contact box 20. For example, the side connection mechanism 321 may include a slot and a buckle, which are symmetrically arranged on the left and right sides of the contact box 20. The buckle is used to insert into the slot of another adjacent contact box 20 when the contact box 20 is inserted into the insertion and removal fixing slot 12 (interference fit). It may also include a hook band (covered with dense, hard micro hooks) and a wool band (covered with soft, fluffy fine loops of wool), which are symmetrically arranged on the left and right sides of the contact box 20. The hook band is used to align and press with the wool band of another adjacent contact box 20 when the contact box 20 is inserted into the insertion and removal fixing slot 12, so that the hook on the hook band hooks into and wraps around the loops of wool band, etc., but is not limited to these.

[0078] The locking drive 322 is a device that can drive adjacent side connection mechanisms 321 to lock or unlock synchronously through rotational movement. For example, the locking drive 322 can be a key-shaped structure (convex structure), a servo motor, etc., but is not limited to these.

[0079] With this configuration, when the contact box 20 is inserted into the installation and receiving space 11, the limiting of the insertion and removal fixing slot 12 ensures precise alignment of the side connection mechanisms 321 of adjacent contact boxes 20. During the locking process, rotating the locking drive 322 simultaneously drives two adjacent side connection mechanisms 321 to interlock, reducing the horizontal gap between adjacent contact boxes 20 and forming a rigid interlock. The user can drive each adjacent side connection mechanism 321 to interlock separately using only one locking drive 322. For example, after driving a pair of adjacent side connection mechanisms 321 to interlock, the locking drive 322 can be pulled out (disassembled), and then another pair of adjacent side connection mechanisms 321 can be inserted (assembled) to drive the other pair of adjacent side connection mechanisms 321 to interlock.

[0080] In some embodiments, please refer to the following: Figure 4 , Figure 6 Figure 7 The side connection mechanism 321 includes a side receiving member 3211 and a rotation locking member 3212.

[0081] A side receiving member 3211 is disposed on one side of the contact box 20, having a side receiving space 32111 and a sliding guide groove 32112. The sliding guide groove 32112 has an open end and is connected to the side receiving space 32111.

[0082] The rotating locking member 3212 is located within the side receiving space 32111 and has a locking structure 32121 and a transmission groove 32122. The locking structure 32121 is located within the sliding guide groove 32112, and the transmission groove 32122 is located outside the side receiving space 32111. The rotating locking member 3212 is movably disposed on the side receiving member 3211 along the sliding guide groove 32112.

[0083] The locking drive 322 is used to drive the rotating locking member 3212 to move along the sliding guide groove 32112 and partially move into the side receiving space 32111 of the adjacent side receiving member 3211 located on another contact box 20, so that the locking structure 32121 extends synchronously into the sliding guide groove 32112 of the adjacent side receiving member 3211 located on another contact box 20 through the open end.

[0084] It is understood that the side receiving member 3211 is the mounting base of the side connecting mechanism 321, providing receiving space and precise guidance for the rotary locking member 3212. For example, the side receiving member 3211 can be a concave structure made of engineering plastic or aluminum alloy, but is not limited to this.

[0085] The rotary locking element 3212 is the core functional component of the side connecting mechanism 321, integrating both moving and locking functions. It achieves cross-box engagement by moving along the sliding guide groove 32112. For example, the rotary locking element 3212 can be a semi-circular structure made of engineering plastic or aluminum alloy, but is not limited to these.

[0086] With this configuration, when the contact box 20 is fixed to the insertion and removal fixing slot 12, the open ends of the side receiving parts 3211, the transmission slots 32122, and the sliding guide slots 32112 on both sides of the adjacent contact boxes 20 are precisely aligned, and the rotating locking part 3212 is in the initial position of the side receiving space 32111. During the cross-box interlocking stage, the locking drive part 322 is simultaneously inserted into the two transmission slots 32122 and simultaneously connected to the two transmission slots 32122. The user or servo motor drives the locking drive part 322 to rotate, thereby driving the rotating locking part 3212 to move (rotate) along the sliding guide slot 32112. Part of the rotating locking part 3212 extends into the side receiving space 32111 of the adjacent contact box 20, while the locking structure 32121 extends into the sliding guide slot 32112 of the adjacent receiving part through its open end, completing the cross-box engagement, reducing the horizontal gap between the adjacent contact boxes 20, and achieving rigid interlocking. During unlocking, the locking drive 322 first drives the rotating locking member 3212 to fully retract into its side receiving space 32111, and then the contact box 20 is disassembled, thus unlocking the two adjacent and interlocked contact boxes 20. Furthermore, the cooperation between the side receiving member 3211 and the rotating locking member 3212 allows for the adaptation of different specifications of contact boxes 20. When expanding the power distribution system, only the number of contact boxes 20 needs to be increased, without adjusting the interlocking structure, thereby reducing the cost of expansion and modification.

[0087] In some embodiments, please refer to the following: Figure 4 , Figure 6 Figure 7 The sliding guide grooves 32112 of two adjacent side receiving members 3211 located on different contact boxes 20 can form a circular through hole.

[0088] This configuration, with adjacent sliding guide grooves 32112 forming a circular through hole, provides a unified and continuous high-precision motion trajectory for the rotary locking component 3212, ensuring that the rotary locking component 3212 moves and rotates without deflection or jamming. At the same time, it achieves precise interlocking of the locking structure 32121 across the box, enhancing the horizontal interlocking effect of adjacent contact boxes 20.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A modular circuit breaker, characterized in that, include: The mounting accommodating part has a mounting accommodating space and a plug-in fixing slot, wherein the plug-in fixing slot is connected to the mounting accommodating space; At least two contact boxes are located within the mounting and receiving space, and the contact boxes have conductive paths; and A connecting part is located within the mounting and accommodating space and disposed on the mounting and accommodating space. The connecting part includes a bottom connecting device and a side connecting device. The bottom connecting device is located within the mounting and accommodating space and disposed on the contact box. The side connecting device is located within the mounting and accommodating space and disposed on the contact box. The bottom connecting device is used to fix the contact box to the mounting and receiving part through the plug-in fixing groove, and the side connecting device is used to lock two adjacent contact boxes to each other.

2. The modular circuit breaker as described in claim 1, characterized in that, The bottom connecting device includes: At least two bottom connecting mechanisms are disposed on the side of the contact box near the insertion and removal fixing slot, and correspond one-to-one with the contact box. The bottom connecting mechanisms are used to move into the insertion and removal fixing slot and fix themselves to the slot, thereby fixing the contact box to the mounting and receiving portion; and A bottom fixing mechanism is rotatably disposed on the mounting and receiving portion and located within the plug-in fixing groove. The bottom fixing mechanism is used to abut against the bottom connecting mechanism located within the plug-in fixing groove, so as to further fix the bottom connecting mechanism to the plug-in fixing groove.

3. The modular circuit breaker as described in claim 2, characterized in that, The bottom connection mechanism includes: The bottom connecting receiver is located on the side of the contact box near the plug-in fixing slot and has two movable slots, which are symmetrically distributed on the upper and lower sides of the bottom connecting receiver. Two movable connectors are respectively partially located in the two movable slots and have abutment slots. The movable connectors can move along the movable slots and partially move into the plug-in fixing slot. An elastic element, the two ends of which are respectively connected to the two movable connecting elements; and A bottom abutment component is rotatably disposed on the bottom connecting receiver and located between the two movable connectors; The elastic element drives the two movable connectors to move away from each other and abut against the inner wall of the plug-in fixing groove, thereby fixing the bottom connecting accommodating member and the mounting accommodating part through the plug-in fixing groove. The movable connector drives the bottom abutting assembly to rotate when moving. The bottom fixing mechanism partially moves into the abutting slot and abuts against the inner wall of the abutting slot to abut against the side of the movable connector located in the plug-in fixing groove away from the contact box and engages with the bottom abutting assembly. When rotating, it drives the bottom abutting assembly to abut against the side of the two movable connectors near the contact box.

4. The modular circuit breaker as described in claim 3, characterized in that, The movable connector has a transmission structure, and the bottom contact assembly includes: A bottom connecting wheel is rotatably mounted on the bottom connecting receiver for engaging with the transmission structure; and A bottom connecting structure is provided on the bottom connecting wheel for engaging with the bottom fixing mechanism; The movable connector is used to drive the bottom connecting wheel to rotate during movement, thereby causing the bottom connecting structure to rotate. The bottom fixing mechanism is used to drive the bottom connecting structure to abut against the two movable connectors on the side near the contact box during rotation.

5. The modular circuit breaker as described in claim 4, characterized in that, The bottom connection structure includes: A bottom limiting and receiving component is provided on the bottom connecting wheel, and has a rotating receiving space and two limiting and moving grooves, the two limiting and moving grooves being respectively connected to the rotating receiving space; A transmission wheel, rotatably mounted on the bottom limiting receiver, is used to engage with the bottom fixing mechanism; and Two movable abutments are respectively located in the two limiting moving grooves and mesh with the transmission wheel. The movable abutments can move along the limiting moving grooves. The bottom fixing mechanism is used to drive the transmission wheel to rotate during rotation, thereby causing the two movable abutment members to move to abut against the two movable connector members on the side near the contact box.

6. The modular circuit breaker as described in claim 3, characterized in that, The bottom fixing mechanism includes: A rotating fixing rod is rotatably mounted on the mounting receiving portion and located within the insertion and removal fixing slot; and At least two bottom fixing components, each having a movable hole that engages with the rotating fixing rod, allowing the bottom fixing component to be movably mounted on the rotating fixing rod along its axial direction. The bottom fixing component is used to partially move into the abutment slot to abut against the side of the movable connector located in the insertion and removal fixing slot away from the contact box, and engages with the bottom abutment component. During rotation, the bottom abutment component is driven to abut against the side of the two movable connectors near the contact box.

7. The modular circuit breaker as described in claim 6, characterized in that, The bottom fixing component includes: A bottom fixing plate, movably mounted on the rotating fixing rod along its axial direction, has the moving hole. The bottom fixing plate is used to partially move into the abutment slot to abut against the side of the movable connector located in the insertion / removal fixing slot away from the contact box; and A bottom fixed wheel is movably disposed on the rotating fixed rod along the axial direction of the rotating fixed rod, and has the moving hole. The bottom fixed wheel is used to engage with the bottom abutment assembly, and drives the bottom abutment assembly to abut against the two movable connecting members when rotating.

8. The modular circuit breaker as described in claim 1, characterized in that, The side connection device includes: At least two side connection mechanisms are symmetrically arranged on the left and right sides of the contact box, respectively. Each side connection mechanism cooperates with an adjacent side connection mechanism located on another contact box to lock the two adjacent contact boxes together. A locking drive, detachably mounted on the side connecting device, is used to rotate to drive the side connecting devices located on two adjacent and different contact boxes to lock each other.

9. The modular circuit breaker as described in claim 8, characterized in that, The side connection mechanism includes: A side receiving member, disposed on one side of the contact box, has a side receiving space and a sliding guide groove, the sliding guide groove having an open end and communicating with the side receiving space; and A rotary locking member is located within the side receiving space and has a locking structure and a transmission groove. The locking structure is located within the sliding guide groove, and the transmission groove is located outside the side receiving space. The rotary locking member is movably disposed on the side receiving member along the sliding guide groove. The locking drive is used to drive the rotary locking member to move along the sliding guide groove and partially move into the side receiving space of the side receiving member located on the adjacent side of another contact box, so that the locking structure extends synchronously into the sliding guide groove of the side receiving member located on the adjacent side of another contact box through the opening end.

10. The modular circuit breaker as described in claim 9, characterized in that, The sliding guide grooves of two adjacent side receptacles located on different contact boxes can form a circular through hole.

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