Base assembly and drawer type circuit breaker
By setting hollow areas and bumps on the wiring row of the drawer circuit breaker, air flowability is enhanced, and the wiring row and busbar are connected through fasteners, the problem of excessive temperature of the electrical connection structure is solved, and the heat dissipation effect and reliability are improved.
Patent Information
- Application Number
- CN202421947574.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The electrical connection structure of existing drawer circuit breakers is prone to excessive temperatures, which affects the service life of the internal components.
A hollow area is set on the wiring row to connect the inside and outside of the drawer seat, increase air flowability, and realize the detachable connection between the wiring row and the busbar through fasteners, set up bumps to increase the current flow area, and use a safety baffle to block the busbar.
It reduces the temperature rise in the drawer seat, reduces the probability of internal components damage, reduces maintenance costs, and improves service life and safety.
Smart Images
Figure CN223273739U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrical equipment, and in particular to a base assembly and a drawer-type circuit breaker. Background Art
[0002] A drawer-type circuit breaker is a modular circuit breaker used to protect and control circuits. It typically consists of a breaker body and a drawer housing. The breaker body is slidably connected to the drawer housing and can be swing out of the housing.
[0003] In the prior art, the circuit breaker body within a drawer-type circuit breaker is electrically connected to an external conductive member via an electrical connection structure. However, in actual use, the electrical connection structure is prone to overheating, which can affect the internal components of the drawer-type circuit breaker and thus shorten the overall service life of the drawer-type circuit breaker. Therefore, a base assembly and a drawer-type circuit breaker are urgently needed. Utility Model Content
[0004] The present application provides a base assembly and a drawer-type circuit breaker to improve the heat dissipation effect of the drawer-type circuit breaker.
[0005] In a first aspect, the present application provides a base assembly for use with a drawer-type circuit breaker, comprising a drawer base. The base assembly comprises a drawer base and a terminal block. The drawer base is mounted on one side of the drawer base and includes a first mounting portion. The terminal block comprises a main body portion and a connecting portion. The main body portion is connected to an external power source, the connecting portion is connected to a side of the main body portion proximal to the drawer base, and the connecting portion is connected to the first mounting portion. The connecting portion has a hollowed-out area that connects the interior and exterior of the drawer base to reduce temperature rise within the drawer base.
[0006] Through the above scheme, the base assembly provided by the present application is provided with a hollow area on the terminal block. When the terminal block is installed on the drawer base, the hollow area can connect the inside and outside of the drawer seat, so that the heat generated inside the drawer seat can flow to the outside of the drawer seat through the hollow area, thereby increasing the air flow between the inside and outside of the drawer seat. When the circuit breaker is in the power-on state, the circulating air can take away part of the heat generated inside the drawer seat. In this way, the temperature rise in the drawer seat is reduced, and the probability of damage to the internal components of the drawer circuit breaker due to excessive heat inside the drawer circuit breaker is reduced, thereby increasing the service life of the drawer circuit breaker.
[0007] In a possible design, the connecting portion is a plate-like structure, and the connecting portion is roughly parallel to the drawer base. A vent is provided at a portion of the connecting portion that is not connected to the main body, and the hollow area is configured as the vent.
[0008] Through the above solution, the hollow area is configured as a vent, and the vent is provided at the position where the connecting part is not connected to the main body, thereby avoiding a large amount of structural loss of the connecting part due to the provision of the hollow area on the connecting part, and maintaining the integrity of the connecting part. Thus, while slightly reducing the strength of the connecting part, the role of the hollow area is ensured, and the service life of the terminal block is ensured.
[0009] In a possible design, the connecting portion is a plate-like structure and is roughly parallel to the drawer base. A ventilation groove is provided at a portion of the connecting portion that is not connected to the main body, and the hollow area is configured as the ventilation groove.
[0010] Through the above scheme, the hollow area is configured as a ventilation groove, which can reduce the difficulty of setting up the hollow area. It is only necessary to open a groove body on the connecting part at one time, which reduces the setting cost of the hollow area, thereby reducing the setting cost of the terminal block. In addition, the ventilation area of the ventilation groove is larger, which can effectively increase the air circulation inside the drawer seat.
[0011] In one possible design, the first mounting portion is a through slot that connects the interior and exterior of the drawer base. A protrusion is connected to the wall of the through slot, and the connecting portion connects to the protrusion, securing the terminal block within the through slot. A hollowed-out area connects to the through slot and cooperates with the through slot to reduce temperature rise within the drawer base.
[0012] According to the above solution, since the first mounting portion is a through slot provided on the drawer base, when the terminal block is installed on the first mounting portion, the hollow area can be connected to a portion of the first mounting portion. In this way, the area for air circulation inside the drawer base can be increased, thereby further reducing the temperature rise inside the drawer base and reducing the probability of damage to the internal components of the drawer-type circuit breaker due to excessive heat inside the drawer-type circuit breaker.
[0013] In one possible design, the base assembly further includes a busbar and a fastener. The busbar is spaced apart from the drawer base relative to the busbar. The busbar has a first mounting hole, and the first mounting hole is positioned opposite the second mounting hole. The end of the fastener passes through the second mounting hole and the first mounting hole, respectively, to secure the busbar to the busbar.
[0014] Through the above solution, a busbar is arranged in the base assembly, and the terminal block and the busbar are electrically connected by fasteners, which not only ensures that the external current can smoothly flow into the busbar through the terminal block, but also, the terminal block and the busbar are connected by fasteners, which can realize the detachable connection between the terminal block and the busbar. When the terminal block or the busbar is aged or damaged, the terminal block or the busbar can be replaced separately, which reduces the later maintenance cost of the drawer-type circuit breaker and reduces the overall use cost of the drawer-type circuit breaker.
[0015] In a possible design, the main body is provided with a protrusion, which is provided on a side of the main body away from the bus bar. The protrusion is used to increase the current flow area of the terminal block.
[0016] With the above solution, a protrusion is provided on the main body, and the protrusion is used to make up for the volume lost when the first mounting hole is provided in the terminal block. In this way, the terminal block and the busbar can be detachably connected while the volume of the terminal block is not reduced. This reduces the probability of the problem of increased heat generated when current passes through the terminal block due to the reduced volume of the terminal block, and reduces the probability of damage to the internal components of the drawer-type circuit breaker due to excessive heat inside the drawer-type circuit breaker.
[0017] In a possible design, all surfaces of the protrusion except the surface used for connecting with the main body are wavy surfaces.
[0018] Through the above solution, the area of the bump can be increased, thereby effectively increasing the contact area between the bump and the air, so that the bump can act as a heat sink, thereby further reducing the temperature rise at the terminal block. In actual use, the surface where the bump is connected to the main body can also be provided with a protrusion, and the surface of the main body used to connect with the bump can be provided with a groove that cooperates with the protrusion. When the bump is installed on the main body, the protrusion can be snapped into the groove. In this way, the contact area between the bump and the main body is increased, and the increased contact surface can increase the efficiency of heat conduction from the main body to the bump, thereby reducing the temperature rise at the terminal block.
[0019] In a possible design, the connection portion is provided with a limiting groove, which is provided on a side of the connection portion away from the main body portion. The busbar portion is located in the limiting groove.
[0020] Through the above solution, the present application provides a limiting groove on the side of the connecting portion away from the main body. When the bus is connected to the terminal block through a fastener, the limiting groove can guide the installation of the bus. After the bus is connected to the terminal block, the limiting groove can limit the bus, thereby reducing the probability of the bus falling off the terminal block when the drawer-type circuit breaker is bumped or shaken due to a loose connection. In this way, the reliability of the drawer-type circuit breaker is increased.
[0021] In a second aspect, the present application provides a drawer-type circuit breaker, comprising a circuit breaker body, a drawer base, and the base assembly described in the first aspect. The base assembly is connected to one side of the drawer base. The circuit breaker body is slidably connected to the drawer base via a slide rail, and the circuit breaker body is electrically connected to a busbar of the base assembly.
[0022] Through the above solution, the present application provides a hollow area on the terminal block, and the hollow area connects the interior and exterior of the drawer-type circuit breaker, thereby increasing air circulation inside and outside the drawer-type circuit breaker. When the circuit breaker is in the energized state, current flows through the terminal block and busbar, at which time a large amount of heat is generated in the terminal block, busbar, and circuit breaker body. The present application increases the air circulation inside and outside the drawer-type circuit breaker, which can improve the heat dissipation effect of the drawer-type circuit breaker, thereby reducing the temperature rise in the drawer base.
[0023] In one possible design, the drawer-type circuit breaker further includes a safety shield. The safety shield is disposed between the base assembly and the circuit breaker body and is fixedly connected to the base assembly. The safety shield has a wiring hole. The circuit breaker body is connected to the busbar through the wiring hole.
[0024] With the above solution, the safety baffle provided between the base assembly and the circuit breaker body can shield the busbar exposed to the air when the circuit breaker body is removed from the drawer seat, thereby reducing the probability of electric shock caused by the operator accidentally touching the busbar. The wiring hole provided on the safety baffle can ensure that the circuit breaker body can be connected to the busbar through the wiring hole, thereby increasing the safety of the drawer-type circuit breaker without affecting the use of the drawer-type circuit breaker.
[0025] The beneficial effects of the drawer-type circuit breaker provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic structural diagram of a drawer-type circuit breaker provided in an embodiment of the present application.
[0027] Figure 2 Schematic diagram of the internal structure of the drawer seat provided in an embodiment of the present application.
[0028] Figure 3 This is a schematic diagram of the assembly of the drawer base and the terminal block provided in an embodiment of the present application.
[0029] Figure 4 A schematic diagram of the structure of the terminal block provided in an embodiment of the present application at one viewing angle.
[0030] Figure 5 This is a structural diagram of the drawer base provided in an embodiment of the present application.
[0031] Figure 6 Schematic diagram of the assembly of the terminal block and busbar provided in an embodiment of the present application.
[0032] Figure 7This is an exploded view of the terminal block and busbar provided in an embodiment of the present application.
[0033] Figure 8 A schematic diagram of the structure of the terminal block provided in an embodiment of the present application from another perspective.
[0034] Figure 9 Schematic diagram of the assembly of the safety baffle and base assembly provided in an embodiment of the present application.
[0035] Figure 10 A schematic structural diagram of the safety baffle provided in an embodiment of the present application.
[0036] Description of reference numerals:
[0037] 100, drawer base; 110, first mounting portion; 111, protruding structure;
[0038] 200, terminal block; 210, main body; 211, bump; 220, connecting portion; 221, hollow area; 222, limiting groove; 230, first mounting hole;
[0039] 300, busbar; 310, second mounting hole;
[0040] 400, fasteners;
[0041] 500, drawer seat;
[0042] 600, circuit breaker body;
[0043] 700, slide rail;
[0044] 800, safety baffle; 810, wiring hole. DETAILED DESCRIPTION
[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0047] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.
[0048] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0049] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.
[0050] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the static contact of a circuit breaker and the circuit breaker of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.
[0051] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.
[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. "Connected" or "connected" in a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application.
[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0054] Figure 1 This is a schematic structural diagram of a drawer-type circuit breaker provided in an embodiment of the present application. Figure 2 Schematic diagram of the internal structure of the drawer seat provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the assembly of the drawer base and the terminal block provided in an embodiment of the present application.
[0055] like Figures 1 to 3 As shown, the present application provides a drawer-type circuit breaker, which includes a circuit breaker body 600, a drawer base 500, and a base assembly. The base assembly is connected to one side of the drawer base 500. The circuit breaker body 600 is slidably connected to the drawer base 500 via a slide rail 700, and the circuit breaker body 600 is electrically connected to the busbar 300 of the base assembly.
[0056] The circuit breaker body 600 is connected to the inside of the drawer seat 500 through the slide rail 700. When the circuit breaker body 600 needs to be repaired or replaced, the circuit breaker body 600 can be shaken out of the drawer seat 500 for operation.
[0057] A plurality of terminal blocks 200 connected to the base assembly are provided outside the base assembly. The terminal blocks 200 can be electrically connected to an external power supply. A hollow area 221 connecting the inside and outside of the drawer-type circuit breaker is provided on the terminal block 200. A plurality of bus bars 300 are provided inside the base assembly. The plurality of bus bars 300 are electrically connected to the plurality of terminal blocks 200 respectively.
[0058] When the circuit breaker body 600 is inserted into the drawer 500, it is electrically connected to the busbar 300. Current from the external power source can flow sequentially through the terminal block 200 and the busbar 300 before entering the circuit breaker body 600, allowing the circuit breaker body 600 to control the conduction of the circuit. When the circuit requires maintenance, the circuit breaker body 600 can be removed from the drawer 500, disconnecting it from the busbar 300.
[0059] Through the above-described arrangement, the present application provides a hollow area 221 on the terminal block 200, and the hollow area 221 connects the interior and exterior of the drawer-type circuit breaker, thereby increasing air circulation between the interior and exterior of the drawer-type circuit breaker. When the circuit breaker is energized, current flows through the terminal block 200 and the busbar 300. At this time, a large amount of heat is generated at the terminal block 200, the busbar 300, and the circuit breaker body 600. The present application increases the air circulation between the interior and exterior of the drawer-type circuit breaker, thereby improving the heat dissipation effect of the drawer-type circuit breaker, thereby reducing the temperature rise within the drawer base 500.
[0060] The base assembly mentioned in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0061] Figure 4 A schematic diagram of the structure of the terminal block provided in an embodiment of the present application at one viewing angle.
[0062] like Figure 1 、 Figure 3 as well as Figure 4 As shown, the present application provides a base assembly for use in a drawer-type circuit breaker, which includes a drawer base 500. The base assembly includes: a drawer base 100 and a terminal block 200. The drawer base 100 is installed on one side of the drawer base 500, and the drawer base 100 includes a first mounting portion 110. The terminal block 200 includes a main body 210 and a connecting portion 220. The main body 210 is connected to an external power source, and the connecting portion 220 is connected to a side of the main body 210 close to the drawer base 100. The connecting portion 220 is connected to the first mounting portion 110, and the connecting portion 220 is provided with a hollow area 221. The hollow area 221 connects the inside and outside of the drawer base 500 to reduce the temperature rise in the drawer base 500.
[0063] The drawer base 500 can be a "mouth"-shaped structure formed by four plate-like structures connected in sequence. The drawer base 100 is installed at the opening on one side of the drawer base 500 to cover the opening on one side of the drawer base 500. The opening on the other side of the drawer base 500 is used to install the circuit breaker body 600.
[0064] The drawer base 100 may be plate-shaped, and the first mounting portion 110 may be a mounting area provided on the drawer base 100. There may be multiple first mounting portions 110. There may also be multiple terminal blocks 200, with the multiple terminal blocks 200 corresponding one-to-one with the multiple first mounting portions 110, and the multiple terminal blocks 200 are respectively mounted on the multiple first mounting portions 110.
[0065] The main body 210 and the connecting portion 220 may both be plate-like structures, and the main body 210 may be perpendicular to the connecting portion 220. The main body 210 and the connecting portion 220 may be integrally formed, or the main body 210 and the connecting portion 220 may be formed separately and then assembled. The main body 210 may be disposed toward a side of the drawer base 100 away from the drawer seat 500, and the main body 210 may be electrically connected to an external power source. The connecting portion 220 is disposed between the main body 210 and the drawer base 100, with one side of the connecting portion 220 fixedly connected to the main body 210, and the other side of the connecting portion 220 fixedly connected to the first mounting portion 110 of the drawer base 100.
[0066] The hollow area 221 can be a through hole or a through groove provided on the connecting portion 220. The drawer base 100 is installed at an opening on one side of the drawer seat 500 and blocks the opening on one side of the drawer seat 500. This makes it difficult for the air inside the drawer seat 500 to exchange with the air outside the drawer seat 500 after the circuit breaker body 600 is installed from the opening on the other side of the drawer seat 500. The provision of the hollow area 221 can increase the air flow between the inside and outside of the drawer seat 500.
[0067] In summary, the base assembly provided in the present application is provided with a hollow area 221 on the terminal block 200. When the terminal block 200 is installed on the drawer base 100, the hollow area 221 can connect the inside and outside of the drawer seat 500, so that the heat generated inside the drawer seat 500 can flow to the outside of the drawer seat 500 through the hollow area 221, thereby increasing the air flow between the inside and outside of the drawer seat 500. When the circuit breaker is in the power-on state, the circulating air can carry away some of the heat generated inside the drawer seat 500. In this way, the temperature rise in the drawer seat 500 is reduced, the probability of damage to the internal components of the drawer-type circuit breaker due to excessive heat inside the drawer-type circuit breaker is reduced, and the service life of the drawer-type circuit breaker is increased.
[0068] The connection portion 220 may be arranged in various ways. Two possible arrangements will be illustrated below with reference to the accompanying drawings.
[0069] In the first setting form, the connecting portion 220 is a plate-like structure, and the connecting portion 220 is roughly parallel to the drawer base 100. A vent is provided at a portion of the connecting portion 220 not connected to the main body 210, and the hollow area 221 is configured as a vent.
[0070] The connecting portion 220 can be substantially parallel to the drawer base 100. Substantially parallel means that the angle between the two is approximately 0 degrees. For example, the angle between the two is 0 degrees, 3 degrees, 5 degrees, etc., which is not limited in this embodiment of the present application. In addition, all references to substantially parallel below can be understood by referring to the explanation of substantially parallel herein and will not be further elaborated below.
[0071] Because the connecting portion 220 is arranged between the main body 210 and the drawer base 100, and the main body 210 is fixed to the drawer base 100 through the connecting portion 220, the connection between the connecting portion 220 and the main body 210 cannot be connected to the outside of the drawer seat 500, so the vent hole is set at the position where the connecting portion 220 is not connected to the main body 210.
[0072] The vent hole passes through the connecting portion 220 along the installation direction of the wiring block 200 , thereby ensuring that the hollow area 221 can communicate with the inside and outside of the drawer seat 500 .
[0073] The number of vent holes can be one or more. The vent holes can be circular, square, or polygonal. The vent holes can be integrally formed with the connecting portion 220 during the forming process. Alternatively, the vent holes can be provided on the connecting portion 220 after the forming process by slotting or engraving.
[0074] When the first setting form is selected, the hollow area 221 is configured as a vent, and the vent is set at the position where the connecting part 220 is not connected to the main body 210, thereby avoiding the large-scale loss of the structure of the connecting part 220 due to the setting of the hollow area 221 on the connecting part 220, and maintaining the integrity of the connecting part 220. Therefore, while slightly reducing the strength of the connecting part 220, the function of the hollow area 221 is guaranteed, and the service life of the terminal block 200 is guaranteed.
[0075] The second setting form, such as Figure 4 As shown, the connecting portion 220 is a plate-like structure, and the connecting portion 220 is substantially parallel to the drawer base 100 , and a ventilation groove is provided at a portion of the connecting portion 220 not connected to the main body 210 , and the hollow area 221 is configured as the ventilation groove.
[0076] The ventilation groove can be arranged on the connecting portion 220 in a direction perpendicular to the setting direction of the terminal block 200, that is, the ventilation groove can be opened on the connecting portion 220 in a direction parallel to the connecting portion 220 and perpendicular to the main body 210. The ventilation groove can be a blind groove, and the ventilation groove can be opened from the edge of the connecting portion 220 to the connection between the connecting portion 220 and the main body 210.
[0077] When the second setting form is selected, the hollow area 221 is configured as a ventilation groove, which can reduce the difficulty of setting the hollow area 221. It is only necessary to open a groove body on the connecting part 220 at one time, thereby reducing the setting cost of the hollow area 221, thereby reducing the setting cost of the terminal block 200.
[0078] Furthermore, the ventilation groove has a larger ventilation area, which can effectively increase the air flow inside the drawer seat 500.
[0079] Figure 5 This is a structural diagram of the drawer base provided in an embodiment of the present application.
[0080] like Figure 3 as well as Figure 5 As shown, the first mounting portion 110 is a through slot that connects the interior and exterior of the drawer base 500. A protrusion 111 is connected to the slot wall, and the connecting portion 220 connects to the protrusion 111, securing the terminal block 200 within the slot. A hollow area 221 communicates with the slot and cooperates with the slot to reduce temperature rise within the drawer base 500.
[0081] The first mounting portion 110 can be a through groove provided on the drawer base 100 along the installation direction of the terminal block 200. In this way, when the first mounting portion 110 is installed on the drawer base 100 and the drawer base 100 is installed on the drawer seat 500, the first mounting portion 110 can connect the inside and outside of the drawer seat 500.
[0082] When the first mounting portion 110 is a through slot, a protruding structure 111 is provided on the slot wall of the through slot. By connecting the protruding structure 111 to the connecting portion 220 , the connection between the connecting portion 220 and the first mounting portion 110 can be achieved, thereby fixing the terminal block 200 to the drawer base 100 .
[0083] For example, the connection portion can be connected to the protruding structure 111 by bolts. In addition, the wiring block 200 can be fixed to the middle portion of the first connection portion 220. Figure 5As shown, each through-slot has a protrusion 111 at each corner. All four corners of the terminal block 200 are connected to the protrusions 111. When the terminal block 200 is secured to the first mounting portion 110, it can divide the first mounting portion 110 into two areas. After the first mounting portion 110 is divided into two areas, both areas can communicate with the hollow area 221 provided on the connecting portion 220.
[0084] Through the above arrangement, since the first mounting portion 110 is a through groove provided on the drawer base 100, when the terminal block 200 is installed on the first mounting portion 110, the hollow area 221 can be connected to a portion of the first mounting portion 110. In this way, the area for air circulation inside the drawer base 500 can be increased, thereby further reducing the temperature rise inside the drawer base 500 and reducing the probability of damage to the internal components of the drawer-type circuit breaker due to excessive heat inside the drawer-type circuit breaker.
[0085] Figure 6 Schematic diagram of the assembly of the terminal block and busbar provided in an embodiment of the present application. Figure 7 This is an exploded view of the terminal block and busbar provided in an embodiment of the present application.
[0086] like Figure 1 、 Figure 6 as well as Figure 7 As shown, the base assembly further includes a busbar 300 and a fastener 400. The terminal block 200 is positioned away from the drawer base 500 relative to the busbar 300. The terminal block 200 has a first mounting hole 230, and the busbar 300 has a second mounting hole 310. The first mounting hole 230 and the second mounting hole 310 are positioned opposite each other. The end of the fastener 400 passes through the second mounting hole 310 and the first mounting hole 230, respectively, to fasten the terminal block 200 to the busbar 300.
[0087] The terminal block 200 is positioned toward the outside of the drawer housing 500, while the busbar 300 is positioned toward the inside of the drawer housing 500. The terminal block 200 is electrically connected to the busbar 300. Connecting teeth are provided on the side of the busbar 300 facing the circuit breaker body 600. To accommodate the current rating, the connecting teeth can be two or three, for example. The busbar 300 can be connected to the circuit breaker body 600 using a bundled clamp.
[0088] When the drawer-type circuit breaker is in normal use, current may pass through the terminal block 200 and the busbar 300 in sequence, and finally flow into the circuit breaker body 600 electrically connected to the busbar 300 .
[0089] The side of the terminal block 200 facing the busbar 300 is provided with a first mounting hole 230. There may be multiple first mounting holes 230, which may be blind holes or through holes. The side of the busbar 300 facing the terminal block 200 is provided with a second mounting hole 310. Similarly, there may be multiple second mounting holes 310. It should be noted that the number and location of the first mounting holes 230 and the second mounting holes 310 correspond to each other.
[0090] The fastener 400 can be a screw or a pin. During assembly, the terminal block 200 and the busbar 300 are first aligned so that the first mounting hole 230 corresponds to the second mounting hole 310. The fastener 400 is then passed through the second mounting hole 310 and then into the first mounting hole 230 to complete the connection between the terminal block 200 and the busbar 300.
[0091] Through the above arrangement, the busbar 300 is arranged in the base assembly, and the terminal block 200 and the busbar 300 are electrically connected by the fastener 400, which not only ensures that the external current can smoothly flow into the busbar 300 through the terminal block 200, but also, the terminal block 200 and the busbar 300 are connected by the fastener 400, which can realize the detachable connection between the terminal block 200 and the busbar 300. When the terminal block 200 or the busbar 300 is aged or damaged, the terminal block 200 or the busbar 300 can be replaced separately, thereby reducing the later maintenance cost of the drawer-type circuit breaker and reducing the overall use cost of the drawer-type circuit breaker.
[0092] Because the connection block 200 and the busbar 300 are detachably connected, a first mounting hole 230 for connecting to the busbar 300 needs to be provided on the connection block 200. This reduces the volume of the connection block 200. This reduction in volume increases the heat generated when current passes through the connection block 200. In view of this, the present application further improves the connection block 200, which will be described in detail below with reference to the accompanying drawings.
[0093] like Figure 4 as well as Figure 7 As shown, the main body 210 is provided with a protrusion 211 . The protrusion 211 is provided on a side of the main body 210 away from the busbar 300 . The protrusion 211 is used to increase the current flow area of the terminal block 200 .
[0094] The bump 211 can be a raised structure provided on the main body 210. The provision of the bump 211 can compensate for the volume lost when the first mounting hole 230 is provided on the terminal block 200. The volume of the bump 211 can be the same as the volume of the portion lost when the first mounting hole 230 is provided on the terminal block 200, or the volume of the bump 211 can be greater than the volume of the portion lost when the first mounting hole 230 is provided on the terminal block 200. The bump 211 can be integrally formed with the main body 210, or the bump 211 can be formed separately from the main body 210 and then assembled.
[0095] Through the above arrangement, a protrusion 211 is provided on the main body 210, and the protrusion 211 is used to make up for the volume lost when the first mounting hole 230 is provided on the terminal block 200. In this way, the terminal block 200 and the busbar 300 can be detachably connected without reducing the volume of the terminal block 200. This reduces the probability of the problem of increased heat generated when current passes through the terminal block 200 due to the reduced volume of the terminal block 200, and reduces the probability of damage to the internal components of the drawer-type circuit breaker due to excessive heat inside the drawer-type circuit breaker.
[0096] In some possible designs, all surfaces of the protrusion 211 except the surface for connecting with the main body 210 may be wavy surfaces.
[0097] Through the above configuration, the area of the bump 211 can be increased, thereby effectively increasing the contact area between the bump 211 and the air, so that the bump 211 can act as a heat sink, thereby further reducing the temperature rise at the terminal block 200.
[0098] In actual use, the surface where the bump 211 connects to the main body 210 can also be provided with a protrusion, and the surface of the main body 210 that connects to the bump 211 can be provided with a groove that mates with the protrusion. When the bump 211 is installed on the main body 210, the protrusion can snap into the groove. This increases the contact area between the bump 211 and the main body 210. This increased contact area can increase the efficiency of heat transfer from the main body 210 to the bump 211, thereby reducing the temperature rise at the terminal block 200.
[0099] Figure 8 A schematic diagram of the structure of the terminal block provided in an embodiment of the present application from another perspective.
[0100] In order to increase the reliability of the drawer type circuit breaker, the present application also makes some improvements to the connection between the terminal block 200 and the bus bar 300, such as Figure 7 as well as Figure 8 As shown, the connection portion 220 is provided with a limiting groove 222 , which is provided on a side of the connection portion 220 away from the main body 210 . The bus bar 300 is partially located in the limiting groove 222 .
[0101] The limiting groove 222 may be a groove structure provided on a side of the connecting portion 220 away from the main body 210 and facing the main body 210. When the busbar 300 is connected to the terminal block 200, a portion of the busbar 300 may abut against the groove wall of the limiting groove 222.
[0102] Through the above arrangement, the present application provides a limiting groove 222 on the side of the connecting portion 220 away from the main body 210. When the busbar 300 is connected to the terminal block 200 via the fastener 400, the limiting groove 222 can guide the installation of the busbar 300. After the busbar 300 is connected to the terminal block 200, the limiting groove 222 can limit the busbar 300, reducing the probability of the busbar 300 falling off the terminal block 200 due to a loose connection when the drawer-type circuit breaker is bumped or shaken, thereby increasing the reliability of the drawer-type circuit breaker.
[0103] At present, safety issues are receiving increasing attention during the use of electrical equipment. Therefore, in order to reduce the probability of electric shock to operators when using drawer-type circuit breakers, this application has made some improvements to drawer-type circuit breakers. The improvements will be described in detail below with reference to the accompanying drawings.
[0104] Figure 9 Schematic diagram of the assembly of the safety baffle and base assembly provided in an embodiment of the present application. Figure 10 A schematic structural diagram of the safety baffle provided in an embodiment of the present application.
[0105] like Figure 1 、 Figure 2 、 Figure 9 as well as Figure 10 As shown, the drawer-type circuit breaker also includes a safety shield 800. The safety shield 800 is positioned between the base assembly and the circuit breaker body 600 and is fixedly connected to the base assembly. The safety shield 800 is provided with a wiring hole 810. The circuit breaker body 600 is connected to the busbar 300 through the wiring hole 810.
[0106] The safety shield 800 includes a first plate and a second plate. The first plate is fixedly connected to the drawer base 100, and the second plate is slidably connected to the first plate. The second plate is provided with an operating portion protruding from the first plate. Both the first plate and the second plate are provided with wiring holes 810.
[0107] The safety baffle 800 is provided between the base assembly and the circuit breaker body 600. When the circuit breaker body 600 is removed from the drawer seat 500, the busbar 300 is exposed to the air. At this time, the drawer moves the operating portion of the second plate, causing the portion of the second plate without the wiring holes 810 to slide to the portion of the first plate where the wiring holes 810 are provided. The second plate then blocks the wiring holes 810 on the first plate, thereby shielding the busbar 300 exposed to the air.
[0108] When the circuit breaker body 600 needs to be connected to the busbar 300, the drawer moves the operating part of the second plate during movement, so that the wiring hole 810 set on the second plate corresponds to the operating hole set on the first plate. At this time, the circuit breaker body 600 can be connected to the busbar 300.
[0109] In summary, the safety baffle 800 disposed between the base assembly and the circuit breaker body 600 can shield the busbar 300 exposed to the air when the circuit breaker body 600 is removed from the drawer seat 500, thereby reducing the probability of electric shock caused by the operator accidentally touching the busbar 300. The wiring hole 810 provided on the safety baffle 800 can ensure that the circuit breaker body 600 can pass through the wiring hole 810 to be connected to the busbar 300, thereby increasing the safety of the drawer-type circuit breaker without affecting the use of the drawer-type circuit breaker.
Claims
1. A base assembly, applied to a drawer-type circuit breaker, the drawer-type circuit breaker comprising a drawer seat, characterized in that: The base assembly comprises: A drawer base, the drawer base being mounted on one side of the drawer seat, the drawer base comprising a first mounting portion; The terminal block includes a main body and a connecting portion, wherein the main body is connected to an external power source, the connecting portion is connected to a side of the main body close to the drawer base, the connecting portion is connected to the first mounting portion, and the connecting portion is provided with a hollow area, wherein the hollow area connects the interior and exterior of the drawer seat to reduce the temperature rise in the drawer seat.
2. The base assembly according to claim 1, wherein: The connecting portion is a plate-shaped structure and is substantially parallel to the drawer base. A vent hole is provided at a portion of the connecting portion that is not connected to the main body, and the hollow area is configured as the vent hole.
3. The base assembly according to claim 1, wherein: The connecting portion is a plate-shaped structure and is substantially parallel to the drawer base. A ventilation groove is provided at a portion of the connecting portion not connected to the main body, and the hollow area is configured as the ventilation groove.
4. The base assembly according to any one of claims 1 to 3, characterized in that: The first mounting portion is a through slot, and the through slot communicates the interior and exterior of the drawer seat; The groove wall of the through groove is connected with a protruding structure, and the connecting portion is connected to the protruding structure, so that the terminal block is fixed in the through groove; The hollow area is communicated with the through slot, and the hollow area cooperates with the through slot to reduce the temperature rise in the drawer seat.
5. The base assembly according to claim 1, wherein: Also includes busbars and fasteners; The terminal block is away from the drawer seat relative to the bus bar; The terminal block is provided with a first mounting hole, and the busbar is provided with a second mounting hole. The first mounting hole and the second mounting hole are positioned opposite to each other, and the end of the fastener passes through the second mounting hole and the first mounting hole in sequence to fasten the terminal block and the busbar.
6. The base assembly according to claim 5, wherein: The main body is provided with a protrusion, which is arranged on a side of the main body away from the bus bar. The protrusion is used to increase the current flow area of the wiring bank.
7. The base assembly according to claim 6, wherein: All surfaces of the protrusion except the surface used for connecting with the main body are wavy surfaces.
8. The base assembly according to any one of claims 5 to 7, characterized in that The connecting portion is provided with a limiting groove, and the limiting groove is provided on a side of the connecting portion away from the main body portion; The bus bar portion is located in the limiting groove.
9. A drawer type circuit breaker, characterized in that: The invention comprises a circuit breaker body, a drawer seat and a base assembly according to any one of claims 1 to 8; The base assembly is connected to one side of the drawer seat; The circuit breaker body is slidably connected to the drawer seat through a slide rail, and the circuit breaker body is electrically connected to the busbar of the base assembly.
10. The drawer type circuit breaker according to claim 9, characterized in that: Also includes safety bezels; The safety baffle is provided between the base assembly and the circuit breaker body, and the safety baffle is fixedly connected to the base assembly; The safety baffle is provided with a wiring hole; The circuit breaker body is connected to the busbar through the wiring hole.