Electric connection structure of circuit breaker drawer and circuit breaker drawer

Abstract

The utility model relates to the technical field of electrical connection devices, in particular to an electrical connection structure of a circuit breaker drawer and the circuit breaker drawer. The electrical connection structure includes a chuck, a busbar, a user terminal, and a heat dissipation portion. The chuck is provided with a first clamping opening and a second clamping opening. The busbar is provided with a first side and a second side, the first side is provided with a connecting part, and the second side is fixedly provided with a user wiring terminal and a heat dissipation part. And the first clamping opening clamps the connecting part, so that the chuck is electrically connected with the busbar. And the second clamping opening clamps a wiring terminal of the circuit breaker body, so that the chuck is electrically connected with the circuit breaker body. According to the electric connection structure of the breaker drawer and the breaker drawer provided by the invention, the second side of the busbar is fixedly provided with the heat dissipation part, so that heat can flow to the heat dissipation part when flowing from the chuck to the user wiring terminal, the heat is dispersed, and the temperature rise of the user wiring terminal is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical connection device technology, and in particular to an electrical connection structure and circuit breaker drawer. Background Technology

[0002] A drawer-type circuit breaker consists of a circuit breaker body and a drawer. The circuit breaker body comprises core components such as an operating mechanism, contact system, arc-extinguishing chamber, trip unit, and auxiliary contacts, and is the core unit for performing circuit control and protection. The drawer serves as the mounting base for the circuit breaker body, providing mechanical rails and electrical connection interfaces. The circuit breaker body, as a movable unit, is embedded in the drawer; the two are connected by plugging in to achieve conduction between the main circuit and the control circuit.

[0003] Typically, one side of the circuit breaker drawer has a first mounting cavity for installing the circuit breaker body. The circuit breaker body can be freely pulled out or inserted into the first mounting cavity, which facilitates the installation, replacement, or maintenance of the circuit breaker body. The other side of the circuit breaker drawer exposes the user wiring terminals, which are used for user wiring.

[0004] In existing technologies, the temperature rise at the user's wiring terminals is relatively high, which is not conducive to the normal operation of the drawer-type circuit breaker. Utility Model Content

[0005] This utility model provides an electrical connection structure for a circuit breaker drawer and the circuit breaker drawer itself, which has good heat dissipation performance and can reduce the temperature rise at the user's wiring terminals.

[0006] The technical solution of this utility model is as follows:

[0007] In a first aspect, this application provides an electrical connection structure for a circuit breaker drawer, the electrical connection structure including a clamp, a busbar, a user terminal block, and a heat dissipation unit.

[0008] The clamp includes a first clamping port and a second clamping port arranged opposite to each other. The busbar includes a first side and a second side opposite to each other, the first side is provided with a connecting part, and the second side is fixedly provided with a user wiring terminal and a heat dissipation part.

[0009] The first clamping port clamps the connecting part, thereby realizing the electrical connection between the clamp and the busbar. The second clamping port is used to clamp the wiring terminals of the circuit breaker body, thereby realizing the electrical connection between the clamp and the circuit breaker body.

[0010] Based on the electrical connection structure of the circuit breaker drawer provided in the first aspect, the clamp and busbar are electrically connected to each other through the clamping force of the first clamping port, and the clamp and the wiring terminals of the circuit breaker body are electrically connected to each other through the clamping force of the second clamping port. The busbar and the user wiring terminals are fixedly connected. In this connection structure, the contact resistance between the clamp and the busbar is high, the contact resistance between the clamp and the wiring terminals of the circuit breaker body is high, and the contact resistance between the busbar and the user wiring terminals is relatively low. Therefore, the temperature of the clamp is usually higher than the temperature at the user wiring terminals, and heat flows from the clamp towards the user wiring terminals. In this application, a heat dissipation part is fixed on the second side of the busbar. Thus, when heat flows from the clamp towards the user wiring terminals, heat can also flow from the clamp towards the heat dissipation part. In this way, during the heat flow process, the heat dissipation part plays a role in dispersing heat, thereby helping to reduce the temperature rise at the user wiring terminals.

[0011] In one possible design, the heat dissipation part is made of a conductive material.

[0012] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, the heat dissipation part is made of a conductive material. In this way, the heat dissipation part can quickly transfer heat to the surface of the heat dissipation part, thereby helping the heat to dissipate quickly.

[0013] In one possible design, the heat sink and the busbar are independent components, and the heat sink and the busbar are fixedly connected.

[0014] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, when the heat dissipation part and the busbar are independent parts, the manufacturing difficulty of the busbar and the heat dissipation part will be reduced, and the heat dissipation part and the busbar of the required shape can be manufactured more easily.

[0015] In one possible design, the second side has a mounting surface that is flat, the user wiring terminals are in contact with the mounting surface, and at least a portion of the heat dissipation unit is in contact with the mounting surface.

[0016] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, the mounting surface on the second side of the busbar is flat, which facilitates the fabrication of the busbar itself. Furthermore, the flat mounting surface facilitates a tight fit between the user terminals and the mounting surface, as well as a tight fit between the heat dissipation unit and the mounting surface. During current conduction, the tight fit between the mounting surface and the user terminals promotes current conduction, reduces contact resistance, and minimizes heat generation. For heat dissipation, the tight fit between the mounting surface and the heat dissipation unit facilitates heat conduction and facilitates heat dissipation.

[0017] In one possible design, the heat dissipation unit includes a main body and an extension connected to each other. The main body fits against the mounting surface, and the extension has a clearance groove between it and the mounting surface. The extension extends out of the mounting surface in a direction parallel to the mounting surface.

[0018] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, the heat dissipation part includes a body part and an extension part connected to each other. The body part is in contact with the mounting surface, and an clearance groove is provided between the extension part and the mounting surface. In this way, when heat from the busbar is conducted to the body part, some of the heat will be dissipated into the air through the body part, and some of the heat will be conducted from the body part to the extension part. Heat dissipation is achieved through the extension part, thereby improving the heat dissipation efficiency.

[0019] In one possible design, the heat sink is made of aluminum.

[0020] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, aluminum is a conductive material, and the heat dissipation part is also made of aluminum. Therefore, there is an electrical connection between the heat dissipation part and the busbar. During the flow of current, heat is transferred along with the current, and the heat from the busbar is quickly transferred to the surface of the heat dissipation part, accelerating heat dissipation. Secondly, aluminum has a good thermal conductivity, which also facilitates heat conduction. Thirdly, aluminum is lightweight, which helps reduce the weight of the circuit breaker drawer. Finally, aluminum is relatively inexpensive and readily available, which helps reduce the manufacturing cost of the circuit breaker drawer.

[0021] In one possible design, the heat sink and busbar are integrated into a single structure. This reduces the number of components in the electrical connection structure and improves the assembly efficiency of the electrical connection structure.

[0022] In one possible design, the heat dissipation unit includes at least two heat dissipation sub-units, which are located in the unused space between the user terminal block and the edge of the busbar.

[0023] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, the heat dissipation part of this application includes at least two heat dissipation sub-parts, and the heat dissipation sub-parts are disposed in the idle space between the user terminal and the busbar edge. Thus, a structural layout is formed in which the heat dissipation sub-parts surround the user terminal. This structural layout helps to set more heat dissipation sub-parts, and the heat at the user terminal is distributed by multiple heat dissipation sub-parts, thereby helping to reduce the temperature rise at the user terminal.

[0024] In one possible design, the heat dissipation unit is also provided with heat dissipation holes and / or heat dissipation slots.

[0025] Based on the electrical connection structure of the circuit breaker drawer provided in this embodiment, providing heat dissipation holes or heat dissipation grooves on the heat dissipation part helps to increase the heat dissipation area of ​​the heat dissipation part and improve the heat dissipation effect.

[0026] Secondly, based on the same inventive concept, this application also provides a circuit breaker drawer, including the electrical connection structure of any of the circuit breaker drawers described above. The beneficial effects of the circuit breaker drawer can be found in the beneficial effects brought about by the electrical connection structure of the circuit breaker drawer described above, and will not be repeated here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the connection between the electrical connection structure of a circuit breaker drawer and the wiring terminals of the circuit breaker body, as provided in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the structure of a circuit breaker drawer provided in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the electrical connection structure of the circuit breaker drawer and its assembly with the base plate, as provided in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of a structure for connecting a busbar and a heat dissipation unit according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of a heat dissipation unit provided in an embodiment of this application.

[0032] Figure 6 This is another structural diagram showing the connection between the bus and the heat dissipation unit provided in an embodiment of this application.

[0033] Figure 7 This is another structural diagram showing the connection between the bus and the heat dissipation unit provided in an embodiment of this application.

[0034] The attached figures are labeled as follows:

[0035] A. Incoming cable terminal; B. Outgoing cable terminal;

[0036] 1. Drawer section;

[0037] 2. Base plate;

[0038] 3. Electrical connection structure;

[0039] 31. Clamp;

[0040] 32. Busbar; 321. Connector; 322. Mounting surface;

[0041] 33. User wiring terminals;

[0042] 34. Heat dissipation section; 341. Mounting hole; 342. Main body; 343. Extension section; 344. Clearance groove; 345. Heat dissipation sub-section; 346. Heat dissipation hole; 347. Heat dissipation groove;

[0043] 43. The wiring terminals of the circuit breaker body;

[0044] D1, First Direction. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion.

[0047] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by spacers, screws, bolts, or other spacers. A physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] The following section provides a detailed description of this application, starting from its background.

[0051] A drawer-type circuit breaker consists of a circuit breaker body and a drawer. The circuit breaker body comprises core components such as an operating mechanism, contact system, arc-extinguishing chamber, trip unit, and auxiliary contacts, and is the core unit for performing circuit control and protection. The drawer serves as the mounting base for the circuit breaker body, providing mechanical rails and electrical connection interfaces. The circuit breaker body, as a movable unit, is embedded in the drawer; the two are connected by plugging in to achieve conduction between the main circuit and the control circuit.

[0052] Typically, one side of the circuit breaker drawer has a first mounting cavity for installing the circuit breaker body. The circuit breaker body can be freely pulled out or inserted into the first mounting cavity, which facilitates the installation, replacement, or maintenance of the circuit breaker body. The other side of the circuit breaker drawer exposes the user wiring terminals, which are used for user wiring.

[0053] In existing technologies, the temperature rise at the user's wiring terminals is relatively high, which is not conducive to the normal operation of the drawer-type circuit breaker.

[0054] In view of this, this application provides an electrical connection structure for a drawer-type circuit breaker, which has good heat dissipation performance and can reduce the temperature rise at the user's wiring terminals.

[0055] Figure 1 A schematic diagram illustrating the connection between the electrical connection structure of a circuit breaker drawer and the wiring terminals of the circuit breaker body, provided in this embodiment of the application, is shown below. Figure 1 The electrical connection structure 3 of the circuit breaker drawer provided in this application includes a clamp 31, a busbar 32, a user terminal block 33, and a heat dissipation part 34. The clamp 31 includes a first clamping port and a second clamping port arranged opposite to each other.

[0056] The busbar 32 includes a first side and a second side, the first side is provided with a connection part 321, and the second side is fixedly provided with a user terminal 33 and a heat dissipation part 34.

[0057] The first clamping port clamps the connecting part 321, thereby realizing the electrical connection between the clamp 31 and the busbar 32. The second clamping port is used to clamp the wiring terminal 43 of the circuit breaker body, thereby realizing the electrical connection between the clamp 31 and the circuit breaker body.

[0058] Figure 2 Please refer to the structural schematic diagram of a circuit breaker drawer provided in this application embodiment. Figure 2 The circuit breaker drawer includes a drawer section 1, a base plate 2, and the aforementioned electrical connection structure 3, along... Figure 2 In the first direction D1 shown, the drawer portion 1 is generally frame-shaped, and the base plate 2 is fitted into the drawer portion 1. The drawer portion 1 has a first mounting cavity for mounting the circuit breaker body on one side of the base plate 2. The electrical connection structure 3 is mounted through the base plate 2.

[0059] Figure 3 This is a schematic diagram of the electrical connection structure of the circuit breaker drawer and its assembly with the base plate, as provided in an embodiment of this application. Two user wiring terminals are not installed. Please refer to... Figure 1 , Figure 2 and Figure 3 The clamp 31 in the electrical connection structure 3 includes a first clamping port and a second clamping port arranged opposite to each other. The first clamping port is used to clamp the connection part 321 of the busbar 32, and the second clamping port is used to clamp the wiring terminal 43 of the circuit breaker body.

[0060] During circuit breaker drawer assembly, busbar 32 is embedded in the opening of base plate 2, and clamp 31 is installed in the second mounting cavity formed on base plate 2. The first clamping port of clamp 31 clamps the connecting part 321 of busbar 32, thereby achieving electrical connection with busbar 32. The wiring terminal 43 of the main body extends into the second mounting cavity and connects to clamp 31. The mounting surface 322 on the second side of busbar 32 is exposed on base plate 2, and user wiring terminal 33 is electrically connected to the second side of busbar 32. Heat dissipation part 34 is also provided on the second side of busbar 32.

[0061] Please continue to refer to this. Figure 1 The heat dissipation principle of the electrical connection structure 3 in this application is as follows: the clamp 31 and the busbar 32 are electrically connected to each other through the clamping force of the first clamping port, and the clamp 31 and the wiring terminal 43 of the circuit breaker body are electrically connected to each other through the clamping force of the second clamping port. The busbar 32 and the user wiring terminal 33 are fixedly connected. In this connection structure, the contact resistance between the clamp 31 and the busbar 32 is relatively high, the contact resistance between the clamp 31 and the wiring terminal 43 of the circuit breaker body is relatively high, and the contact resistance between the busbar 32 and the user wiring terminal 33 is relatively low. Therefore, the temperature of the clamp 31 is usually higher than the temperature of the user wiring terminal 33, and heat flows from the clamp 31 towards the user wiring terminal 33.

[0062] In this application, a heat dissipation part 34 is fixed on the second side of the busbar 32. In this way, when heat flows from the clamp 31 toward the user terminal 33, heat can also flow from the clamp 31 toward the heat dissipation part 34. Thus, during the flow of heat, the heat dissipation part 34 plays a role in dispersing heat, thereby helping to reduce the temperature rise at the user terminal 33.

[0063] In addition, please combine Figure 1 and Figure 3 In the structure of the circuit breaker drawer, the mounting surface 322 of the second side of the busbar 32 of the electrical connection structure 3 is exposed on the base plate 2 and in contact with the outside air. A heat dissipation part 34 is provided on the second side surface of the busbar 32, which helps to accelerate the heat exchange with the outside air.

[0064] Please continue to refer to this. Figure 1 and Figure 2It should be noted that the circuit breaker drawer includes not only the incoming terminal A but also the outgoing terminal B. The incoming terminal A and the outgoing terminal B can use the same or similar electrical connection structure 3. The electrical connection structure 3 provided in this application can be used as the electrical connection structure for both the incoming terminal A and the outgoing terminal B. When the drawer-type circuit breaker is in use, the circuit breaker body is inserted into the circuit breaker drawer, and the terminals 43 of the circuit breaker body are electrically connected to the clamps 31 on the drawer for the incoming terminal A and the outgoing terminal B, thus achieving the electrical connection of the main circuit.

[0065] Please continue to refer to this. Figure 1 and Figure 2 In this application, the electrical connection structure 3 includes a busbar 32 and a user terminal block 33. The busbar 32 and the user terminal block 33 are two separate components, which facilitates the installation of the user terminal block 33 at different angles on the busbar 32. For example, in Figure 2 In the structure shown, the installation directions of the user terminal 33 at the inlet end A and the user terminal 33 at the outlet end B are perpendicular.

[0066] Please continue to refer to this. Figure 1 In some embodiments of this application, the heat dissipation part 34 is made of a conductive material. Specifically, the heat dissipation part 34 is made of a conductive material, so that the heat dissipation part 34 can quickly transfer heat to its surface, thereby facilitating rapid heat dissipation. In some embodiments of this application, the conductive material can be copper, aluminum, silver, graphite, etc.

[0067] Figure 4 Please refer to the schematic diagram of a busbar and heat dissipation unit connection provided in an embodiment of this application. Figure 1 and Figure 4 In some embodiments of this application, the heat dissipation part 34 and the bus 32 are independent parts, and the heat dissipation part 34 and the bus 32 are fixedly connected.

[0068] Specifically, when the heat sink 34 and the busbar 32 are independent parts, the manufacturing difficulty of the busbar 32 and the heat sink 34 will be reduced, and the heat sink 34 and the busbar 32 of the required shape can be manufactured more easily.

[0069] In use, the heat dissipation part 34 can be fixed to the second side of the busbar 32 by means of connection such as threaded fasteners. Figure 4 The mounting holes 341 on the heat dissipation section 34 are used to install threaded fasteners. It should be noted that the connection between the heat dissipation section 34 and the busbar 32 is not limited to threaded fasteners, but can also be achieved through other methods, such as welding, snap-fitting, etc.

[0070] Please continue to refer to this. Figure 1 and Figure 4In some embodiments of this application, the second side has a mounting surface 322, which is a plane, and the user terminal 33 is in contact with the mounting surface 322. At least a portion of the heat dissipation part 34 is in contact with the mounting surface 322.

[0071] Specifically, the mounting surface 322 on the second side of the busbar 32 is flat, which facilitates the fabrication of the busbar 32 itself. Furthermore, the flatness of the mounting surface 322 facilitates a tight fit between the user terminal 33 and the mounting surface 322, as well as a tight fit between the heat sink 34 and the mounting surface 322. During current conduction, the tight fit between the mounting surface 322 and the user terminal 33 promotes current conduction, reduces contact resistance, and minimizes heat generation. For the heat sink 34, the tight fit between the mounting surface 322 and the heat sink 34 facilitates heat conduction and heat dissipation.

[0072] Figure 5 This is a schematic diagram of a heat dissipation component provided in an embodiment of this application. Please refer to it. Figure 2 , Figure 4 and Figure 5 In some embodiments of this application, the heat dissipation part 34 includes a body part 342 and an extension part 343 connected to each other. The body part 342 is attached to the mounting surface 322, and an avoidance groove 344 is provided between the extension part 343 and the mounting surface 322. The extension part 343 extends out of the mounting surface 322 in a direction parallel to the mounting surface 322.

[0073] Specifically, as mentioned above, the electrical connection structure 3 is mounted via the base plate 2, and in some cases, the specific structure of the heat dissipation section 34 is affected by the base plate 2. In some embodiments of this application, by providing a clearance groove 344 between the extension section 343 and the mounting surface 322, the extension section 343 of the heat dissipation section 34 can avoid the relevant structures at the base plate 2.

[0074] Based on the electrical connection structure 3 provided in this embodiment, the heat dissipation part 34 includes a main body part 342 and an extension part 343 connected to each other. The main body part 342 is in contact with the mounting surface 322, and an avoidance groove 344 is provided between the extension part 343 and the mounting surface 322. In this way, when heat from the busbar 32 is conducted to the main body part 342, some heat will be dissipated into the air through the main body part 342, and some heat will be conducted from the main body part 342 to the extension part 343. The heat dissipation efficiency is improved through the additional heat dissipation of the extension part 343.

[0075] Please continue to refer to this. Figures 4 to 5 In some embodiments of this application, the heat dissipation part 34 is made of aluminum.

[0076] First, aluminum is a conductive material, and since the heat sink 34 is made of aluminum, there is an electrical connection between the heat sink 34 and the busbar 32. As current flows, heat is transferred along with the current, and the heat from the busbar 32 is quickly transferred to the surface of the heat sink 34, accelerating heat dissipation. Second, aluminum has a good thermal conductivity, which also facilitates heat conduction. Third, aluminum is lightweight, which helps reduce the weight of the circuit breaker drawer. Finally, aluminum is relatively inexpensive and readily available, which helps reduce the manufacturing cost of the circuit breaker drawer.

[0077] Figure 6 This is another structural diagram showing the connection between the bus and the heat dissipation unit provided in an embodiment of this application. Figure 7 This is another structural diagram showing the connection between the busbar and the heat sink provided in an embodiment of this application. Please refer to... Figure 6 and Figure 7 In one embodiment of this application, the heat dissipation unit 34 and the busbar 32 are integrated into one structure. This reduces the number of components in the electrical connection structure 3 and improves the assembly efficiency of the electrical connection structure 3.

[0078] Please continue to refer to this. Figures 6 to 7 In some embodiments of this application, the heat dissipation part 34 includes at least two heat dissipation sub-parts 345, which are disposed in the unused space between the user terminal 33 and the edge of the busbar 32.

[0079] Specifically, please combine Figure 3 , Figure 6 and Figure 7 The heat dissipation section 34 of this application includes at least two heat dissipation subsections 345, and the heat dissipation subsections 345 are disposed in the unused space between the user terminal 33 and the edge of the busbar 32. Thus, a structural layout is formed in which the heat dissipation subsections 345 surround the user terminal 33. This structural layout helps to set more heat dissipation subsections 345, and the heat at the user terminal 33 is dispersed by multiple heat dissipation subsections 345, thereby helping to reduce the temperature rise at the user terminal 33.

[0080] Please continue to refer to this. Figure 3 , Figure 6 and Figure 7 In some embodiments of this application, the shape of the part where the user terminal 33 and the busbar 32 are in contact is circular. Therefore, the outline of the heat sink 345 near the user terminal 33 is also circular. In this way, the idle space between the user terminal 33 and the busbar 32 can be better utilized, thereby improving heat dissipation efficiency.

[0081] It should be noted that, in Figure 3 , Figure 6 and Figure 7In the structure shown, the shape of the area where the user terminal 33 and the busbar 32 meet is circular, and the number of heat dissipation sub-parts 345 is two. In other embodiments of this application, the shape of the area where the user terminal 33 and the busbar 32 meet can also be other shapes, such as rectangles or other irregular shapes. In that case, the outline and number of heat dissipation sub-parts 345 may also change accordingly depending on the shape and size of the unused space.

[0082] Please continue to refer to this. Figures 4 to 7 In some embodiments of this application, the heat dissipation part 34 is further provided with heat dissipation holes 346 and / or heat dissipation grooves 347.

[0083] Specifically, providing heat dissipation holes 346 or heat dissipation grooves 347 on the heat dissipation part 34 helps to increase the heat dissipation area of ​​the heat dissipation part 34 and improve the heat dissipation effect.

[0084] like Figures 4 to 7 As shown, in this application, the heat dissipation hole 346 can be a circular hole or a rectangular hole. The rectangular hole can be horizontal or vertical. In practical applications, suitable heat dissipation holes 346 and heat dissipation grooves 347 can be provided according to the shape of the heat dissipation part 34. The heat dissipation hole 346 is not limited to a circular hole, and the heat dissipation groove 347 is not limited to a rectangular groove.

[0085] Please refer to Figure 2 Based on the same inventive concept, this application also provides a circuit breaker drawer, which includes the electrical connection structure 3 of the circuit breaker drawer provided in this application. The beneficial effects of the circuit breaker drawer can be found in the beneficial effects brought about by the electrical connection structure 3 of the circuit breaker drawer described above, and will not be repeated here.

[0086] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0087] The above-described embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An electrical connection structure of a circuit breaker drawer, characterized by, Includes clamps, busbars, user terminals, and heat dissipation components; The chuck includes a first clamping port and a second clamping port that are disposed opposite to each other; The busbar includes a first side and a second side opposite to each other. The first side is provided with a connecting part, and the second side is fixedly provided with the user wiring terminal and the heat dissipation part. The first clamping port clamps the connecting part, thereby realizing the electrical connection between the clamp and the busbar. The second clamping port is used to clamp the wiring terminals of the circuit breaker body, thereby realizing the electrical connection between the clamp and the circuit breaker body.

2. The electrical connection structure of a circuit breaker drawer according to claim 1, characterized in that, The heat dissipation part is made of a conductive material.

3. The electrical connection structure of a circuit breaker drawer according to claim 1 or 2, characterized in that, The heat dissipation unit and the busbar are independent components, and the heat dissipation unit is fixedly connected to the busbar.

4. The electrical connection structure of a circuit breaker drawer according to claim 3, characterized in that, The second side has a mounting surface, which is a plane, and the user wiring terminal is in contact with the mounting surface. At least a portion of the heat dissipation part is in contact with the mounting surface.

5. The electrical connection structure of a circuit breaker drawer according to claim 4, characterized in that, The heat dissipation part includes a main body and an extension part connected to each other. The main body is in contact with the mounting surface, and the extension part is provided with a clearance groove between it and the mounting surface. The extension part extends out of the mounting surface in a direction parallel to the mounting surface.

6. The electrical connection structure of a circuit breaker drawer according to claim 3, characterized in that, The heat dissipation part is made of aluminum.

7. The electrical connection structure of a circuit breaker drawer according to claim 1, characterized in that, The heat dissipation unit and the busbar are an integral structure.

8. The electrical connection structure of a circuit breaker drawer according to claim 7, characterized in that, The heat dissipation section includes at least two heat dissipation sub-sections, which are disposed in the unused space between the user terminal block and the edge of the busbar.

9. The electrical connection structure of a circuit breaker drawer according to claim 1, characterized in that, The heat dissipation part is also provided with heat dissipation holes and / or heat dissipation grooves.

10. A circuit breaker drawer characterized by, The electrical connection structure includes the circuit breaker drawer as described in any one of claims 1 to 9.

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