Busbar assembly and drawer type circuit breaker

Abstract

The utility model provides a busbar assembly and a drawer type circuit breaker, and belongs to the technical field of electrical equipment. The busbar assembly provided by the utility model is applied to the drawer type circuit breaker, and the busbar assembly comprises a busbar and a bunchy chuck. The busbar comprises a confluence end and a wiring end, and the wiring end is used for being electrically connected with an external conductive piece. The bunchy chuck comprises a first clamping opening, the first clamping opening is connected with the confluence end, and the first clamping opening is in surface contact with the confluence end. According to the application, the contact area between the bunchy chuck and the confluence end can be increased by enabling the first clamping opening to be in surface contact with the confluence end, so that when current flows through the joint of the bunchy chuck and the busbar, the current circulation area can be increased, the temperature rise of the joint of the bunchy chuck and the busbar can be reduced, and the service life of the bunchy chuck is prolonged. The effect of increasing heat dissipation in the drawer type circuit breaker is achieved, the probability that elements in the drawer type circuit breaker are damaged due to high temperature is reduced, and the service life of the drawer type circuit breaker is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and particularly relates to a busbar assembly and a draw-out circuit breaker. Background Art

[0002] A draw-out circuit breaker is a circuit breaker with a modular design, used for protecting and controlling circuits. A draw-out circuit breaker generally includes a circuit breaker body and a draw-out base. The circuit breaker body is slidably connected to the draw-out base and can be rocked out from the draw-out base. The circuit breaker body is generally connected to an external conductive member through a busbar assembly.

[0003] In the prior art, the temperature of the busbar assembly of a draw-out circuit breaker is prone to being too high, which affects the internal components of the draw-out circuit breaker, thus affecting the overall service life of the draw-out circuit breaker. Therefore, there is an urgent need for a busbar assembly and a draw-out circuit breaker. Summary of the Utility Model

[0004] This application provides a busbar assembly and a draw-out circuit breaker to improve the heat dissipation effect of the draw-out circuit breaker.

[0005] In a first aspect, this application provides a busbar assembly applied to a draw-out circuit breaker. The busbar assembly includes a busbar and a bundle clamp. The busbar includes a busbar end and a connection end, and the connection end is used for electrically connecting with an external conductive member. The bundle clamp includes a first clamping opening, and the first clamping opening is connected to the busbar end, and the first clamping opening is in surface contact with the busbar end.

[0006] Through the above solution, the connection end can be used for electrically connecting with an external conductive member, and the busbar end can be connected to the bundle clamp, so that the busbar can be electrically connected to the internal components of the draw-out circuit breaker through the bundle clamp. The surface contact between the first clamping opening and the busbar end can increase the contact area between the bundle clamp and the busbar end. In this way, when current flows through the connection between the bundle clamp and the busbar, the area of current flow can be increased, thereby reducing the temperature rise at the connection between the bundle clamp and the busbar, achieving the effect of increasing heat dissipation inside the draw-out circuit breaker, reducing the probability of damage to the internal components of the draw-out circuit breaker due to high temperature, and improving the service life of the draw-out circuit breaker.

[0007] In a possible design, the bundle clamp includes a first clamping surface and a second clamping surface. The first clamping opening is formed between the first clamping surface and the second clamping surface, and the first clamping surface and the second clamping surface are flat surfaces. The side of the busbar end for connecting with the first clamping surface is a flat surface, and the side of the busbar end for connecting with the second clamping surface is a flat surface.

[0008] Through the above solution, the first clamping surface is a flat surface, and the side of the busbar end connected to the first clamping surface is a flat surface. When the bundle chuck is connected to the busbar, the first clamping surface can be fitted with the busbar end to achieve surface contact. The second clamping surface is a flat surface, and the side of the busbar end connected to the second clamping surface is a flat surface. When the bundle chuck is connected to the busbar, the second clamping surface can be fitted with the busbar end to achieve surface contact. When this method is selected, the first clamping surface, the second clamping surface and the busbar end are relatively simple to manufacture, which can save the manufacturing cost of the busbar assembly.

[0009] In a possible design, the bundle chuck includes a first clamping surface and a second clamping surface. A first clamping opening is formed between the first clamping surface and the second clamping surface. The first clamping surface and the second clamping surface are first arc surfaces. The side of the busbar end for connecting to the first clamping surface is a second arc surface, and the side of the busbar end for connecting to the second clamping surface is a second arc surface. The first arc surface is fitted with the second arc surface.

[0010] Through the above solution, the first clamping surface is a first arc surface, and the side of the busbar end connected to the first clamping surface is a second arc surface. When the bundle chuck is connected to the busbar, the first clamping surface can be fitted with the busbar end to achieve surface contact. The second clamping surface is a first arc surface, and the side of the busbar end connected to the second clamping surface is a second arc surface. When the bundle chuck is connected to the busbar, the second clamping surface can be fitted with the busbar end to achieve surface contact. When this method is selected, the first arc surface can be a convex arc surface or a concave arc surface, and the second arc surface can be a concave arc surface or a convex arc surface. When the bundle chuck is connected to the busbar, the convex arc surface is fitted with the concave arc surface, which can not only achieve surface contact, but also make the connection between the bundle chuck and the busbar more stable by the cooperation of the convex and the groove, reducing the probability of the problem that the bundle chuck falls off the busbar and increasing the use reliability of the busbar assembly.

[0011] In a possible design, the curvature of the first arc surface is less than the curvature of the second arc surface, or the curvature of the first arc surface is equal to the curvature of the second arc surface.

[0012] Through the above solution, the bending degree of the first arc surface and the second arc surface can be selected according to the actual manufacturing requirements. The curvature of the second arc surface can be greater than or equal to the curvature of the first arc surface, so as to ensure that when the bundle chuck is connected to the busbar, the first clamping surface and the second clamping surface can be fitted with the busbar end, ensuring that the bundle chuck can achieve surface contact with the busbar.

[0013] In a possible design, the busbar end is provided with a convex block. The first clamping opening is provided with a limiting groove for cooperating with the convex block. When the bundle chuck is connected to the busbar end, the convex block is located in the limiting groove to prevent the bundle chuck from falling off the busbar.

[0014] Through the above scheme, a protrusion is provided at the bus end, and a limiting groove is provided at the first clamping opening. When the bundle clamp is connected to the bus, the protrusion can cooperate with the limiting groove to limit the movement of the bundle clamp, thereby reducing the probability of the bundle clamp falling off the bus when the drawer-type circuit breaker shakes or bumps, and increasing the reliability of the use of the drawer-type circuit breaker.

[0015] In a possible design, the bundle clamp includes a first conductive component, a connector and a second conductive component, one end of the connector is connected to the first conductive component, the other end of the connector is connected to the second conductive component, and the connector is located in the first clamp. A groove is provided on one side of the bus end facing the connector.

[0016] Through the above scheme, the connecting piece is combined with the first conductive component and the second conductive component to form a bundle clamp, so that a gap can be generated between the first conductive component and the second conductive component, thereby forming a first clamp for connecting to the busbar. By providing a groove on the side of the busbar end facing the connecting piece, the gap between the busbar end and the connecting piece can be increased, so that a channel is generated between the busbar end and the connecting piece, and air can flow through the channel. In this way, the circulating air can take away part of the heat generated between the busbar end and the bundle clamp, thereby reducing the temperature rise of the busbar assembly, reducing the probability of the internal components of the drawer-type circuit breaker being damaged due to high temperature, and increasing the service life of the drawer-type circuit breaker.

[0017] In a possible design, the busbar includes a first row and a second row connected to each other. The slot is arranged at the busbar end of the first row and / or the busbar end of the second row.

[0018] Through the above scheme, the bus is set in the form of a combination of the first row and the second row. The difficulty of manufacturing the bus can be reduced during the manufacturing of the bus. The first row and the second row can be manufactured by a simple mold, and finally the first row and the second row can be combined into a bus. In this way, while reducing the difficulty of manufacturing the bus, the manufacturing cost of the bus is also reduced, thereby reducing the use cost of the drawer-type circuit breaker.

[0019] In a possible design, the first row is provided with a limiting portion, and the second row is provided with a restricted portion. When the first row and the second row are combined to form a busbar, the limiting portion cooperates with the restricted portion to limit the relative position of the first row and the second row.

[0020] According to the above solution, a limiting part is provided on the first row, and a restricted part cooperating with the limiting part is provided on the second row, which can not only limit the relative position of the first row and the second row by using the limiting part cooperating with the restricted part, thereby improving the reliability of the busbar, but also can guide the first row and the second row when they are assembled, thereby reducing the difficulty of assembling the busbar.

[0021] In a possible design, the draw-out circuit breaker includes a circuit breaker body, the circuit breaker body includes a contact row, the contact row is connected to a bundle chuck, and the bundle chuck includes a second clamping opening. The bundle chuck includes a third clamping surface and a fourth clamping surface, and a second clamping opening is formed between the third clamping surface and the fourth clamping surface. The third clamping surface and the fourth clamping surface are flat surfaces. The side of the contact row for connecting to the third clamping surface is a flat surface, and the side of the contact row for connecting to the fourth clamping surface is a flat surface.

[0022] Through the above solution, the third clamping surface is a flat surface, and the side of the contact row for connecting to the third clamping surface is a flat surface. When the bundle chuck is connected to the contact row, the third clamping surface can fit with the contact row to achieve surface contact. The fourth clamping surface is a flat surface, and the side of the contact row for connecting to the fourth clamping surface is a flat surface. When the bundle chuck is connected to the contact row, the fourth clamping surface can fit with the contact row to achieve surface contact. Such a setting can increase the current flow area when the current flows from the bundle chuck into the contact row, thereby reducing the temperature rise at the connection between the bundle chuck and the contact row, and reducing the probability of the problem of reducing the service life of the draw-out circuit breaker due to the over-high temperature of the internal components of the draw-out circuit breaker.

[0023] In a second aspect, the present application provides a draw-out circuit breaker, including a circuit breaker body and the busbar assembly mentioned in the first aspect above. The circuit breaker body is electrically connected to an external conductive member through the busbar assembly.

[0024] Through the above solution, the present application improves the connection between the busbar and the bundle chuck, changing the original connection by line contact between the bundle chuck and the busbar to surface contact between the bundle chuck and the busbar. In this way, when the current flows through the connection between the bundle chuck and the busbar, the current flow area can be increased, thereby reducing the temperature rise at the connection between the bundle chuck and the busbar, achieving the effect of increasing the internal heat dissipation of the draw-out circuit breaker, and reducing the probability of the problem of reducing the service life of the draw-out circuit breaker due to the over-high temperature of the internal components of the draw-out circuit breaker.

[0025] For the draw-out circuit breaker provided in the second aspect above, the beneficial effects can refer to the beneficial effects brought by the first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view when the busbar assembly and the busbar are assembled according to an embodiment of the present application.

[0027] Figure 2 It is an exploded view of the busbar according to an embodiment of the present application.

[0028] Figure 3Schematic diagram of the structure of the first row provided by the embodiments of the present application.

[0029] Figure 4 Schematic diagram of the structure of the second row provided by the embodiments of the present application.

[0030] Figure 5 Assembly drawing of the busbar provided by the embodiments of the present application.

[0031] Figure 6 Assembly drawing of the busbar assembly and the contact row provided by the embodiments of the present application.

[0032] Explanation of reference numerals:

[0033] 100. Busbar; 110. Busbar end; 111. Bump; 112. Groove; 120. Wiring terminal; 130. First row; 131. Limiting part; 140. Second row; 141. Restricted part;

[0034] 200. Bundle chuck; 210. First conductive component; 211. First clamping surface; 212. Third clamping surface; 220. Second conductive component; 221. Second clamping surface; 222. Fourth clamping surface; 230. Connecting piece; 240. Limiting groove;

[0035] 300. Contact row. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] The terms "including" and "having" and any variations thereof in the description and claims of this application and the drawings are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0039] Reference to "embodiments" in this specification means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0040] The term "and / or" in this specification is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this specification generally represents an "or" relationship between the associated objects before and after.

[0041] The directional terms appearing in the following description are all the directions shown in the figures, 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, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0042] In addition, the terms "first", "second", etc. in the specification and claims of the present 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 of such features.

[0043] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, the "connection" or "linkage" of a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through screws, bolts, or other fixing members; a physical connection may also be a detachable connection, such as a snap connection or a clamping connection; a physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. The "connection" or "linkage" of a circuit structure may refer to not only a physical connection but also an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be indirectly connected through at least one intermediate component, as long as the circuit is connected. It may also be the communication inside two components; in addition to the signal connection through a circuit, the signal connection may also refer to a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0045] The present application provides a draw-out circuit breaker, including a circuit breaker body and a busbar assembly. The circuit breaker body is electrically connected to an external conductive member through the busbar assembly.

[0046] A draw-out circuit breaker is a special low-voltage circuit breaker. Its design feature is that the circuit breaker body can freely enter and exit the drawer seat of the draw-out circuit breaker like a drawer. The draw-out circuit breaker has the advantages of convenient maintenance, high flexibility, and space saving. Draw-out circuit breakers are widely used in factories, commercial buildings, residential areas, etc. as important protection devices for low-voltage distribution networks.

[0047] The drawer seat is also called a drawer unit or a drawer rack, which is an important component for installing the circuit breaker in a control cabinet or a distribution box. The drawer seat can make the installation, maintenance, and replacement of the circuit breaker more convenient. A busbar assembly is provided on the drawer seat, and the busbar assembly includes a busbar and a bundle clamp that are connected to each other. One end of the busbar assembly is located inside the drawer seat, and the other end of the busbar assembly is electrically connected to an external conductive member.

[0048] The circuit breaker body is slidably connected inside the drawer seat so that the circuit breaker body can be separately withdrawn from the drawer seat for repair, replacement, or maintenance without shutting down the entire circuit. The circuit breaker body is provided with a contact row. When the circuit breaker body enters the drawer seat, the contact row can be connected to the bundle clamp, and when the circuit breaker body is rocked out of the drawer seat, the contact row can be separated from the bundle clamp.

[0049] This application improves the connection between the busbar and the bundle chuck. The original connection was a line contact between the bundle chuck and the busbar, which is changed to a surface contact between the bundle chuck and the busbar. In this way, when current flows through the connection between the bundle chuck and the busbar, the area of current flow can be increased, thereby reducing the temperature rise at the connection between the bundle chuck and the busbar, achieving the effect of increasing the heat dissipation inside the drawer circuit breaker, and reducing the probability of problems that reduce the service life of the drawer circuit breaker due to excessive temperature of the internal components of the drawer circuit breaker.

[0050] The following will introduce the busbar assembly mentioned in this application in detail with reference to the accompanying drawings.

[0051] Figure 1 It is a cross-sectional view when the busbar assembly provided by the embodiment of this application is assembled with the busbar. As Figure 1 shown, this application provides a busbar assembly, which is applied to a drawer circuit breaker. The busbar assembly includes a busbar 100 and a bundle chuck 200. The busbar 100 includes a busbar end 110 and a connection terminal 120. The connection terminal 120 is used for electrically connecting with an external conductive part. The bundle chuck 200 includes a first clamping opening, and the first clamping opening is connected to the busbar end 110, and there is a surface contact between the first clamping opening and the busbar end 110.

[0052] The busbar 100 can be in a plate-like structure. The busbar 100 includes two opposite ends, namely the busbar end 110 and the connection terminal 120 respectively. When the busbar assembly is installed on the drawer circuit breaker, the connection terminal 120 is located outside the drawer circuit breaker and is used for electrically connecting with an external conductive part, and the busbar end 110 is located inside the drawer circuit breaker and is used for connecting with the bundle chuck 200.

[0053] The first clamping opening can be an opening provided on one side of the bundle chuck 200 facing the busbar 100. When the busbar 100 is connected to the bundle chuck 200, a part of the busbar end 110 is located inside the first clamping opening, and there is a surface contact between the first clamping opening and the busbar end 110.

[0054] In summary, the connection terminal 120 is electrically connected to the external conductive part, and the busbar end 110 is connected to the first clamping opening of the bundle chuck 200, so that the busbar 100 can be electrically connected to the internal components of the drawer circuit breaker through the bundle chuck 200. Among them, there is a surface contact between the first clamping opening and the busbar end 110, which can increase the contact area between the bundle chuck 200 and the busbar end 110. In this way, when current flows through the connection between the bundle chuck 200 and the busbar 100, the area of current flow can be increased, thereby reducing the temperature rise at the connection between the bundle chuck 200 and the busbar 100, achieving the effect of increasing the heat dissipation inside the drawer circuit breaker, reducing the probability of problems that the internal components of the drawer circuit breaker are damaged due to high temperature, and improving the service life of the drawer circuit breaker.

[0055] The surface contact between the bundle chuck 200 and the bus bar 100 can be achieved in a variety of ways, and two of them will be introduced below.

[0056] In the first way, the bundle chuck 200 includes a first clamping surface 211 and a second clamping surface 221. A first clamping opening is formed between the first clamping surface 211 and the second clamping surface 221, and the first clamping surface 211 and the second clamping surface 221 are flat surfaces. One side of the current collecting end 110 for connecting with the first clamping surface 211 is a flat surface, and one side of the current collecting end 110 for connecting with the second clamping surface 221 is a flat surface.

[0057] The first clamping surface 211 and the second clamping surface 221 are opposite in position. There is a gap between the first clamping surface 211 and the second clamping surface 221 so that the bundle chuck 200 can form a first clamping opening.

[0058] One side of the current collecting end 110 for connecting with the first clamping surface 211 is parallel to the first clamping surface 211, and one side of the current collecting end 110 for connecting with the second clamping surface 221 is parallel to the second clamping surface 221. When the bundle chuck 200 is connected to the bus bar 100, both the first clamping surface 211 and the second clamping surface 221 are in planar contact with the current collecting end 110 to achieve the surface contact between the bundle chuck 200 and the current collecting end 110.

[0059] Through the first way, the first clamping surface 211 is a flat surface, and one side of the current collecting end 110 connected to the first clamping surface 211 is a flat surface. When the bundle chuck 200 is connected to the bus bar 100, the first clamping surface 211 can be in planar contact with the current collecting end 110 to achieve the surface contact between the two. Similarly, the second clamping surface 221 is a flat surface, and one side of the current collecting end 110 connected to the second clamping surface 221 is a flat surface. When the bundle chuck 200 is connected to the bus bar 100, the second clamping surface 221 can be in planar contact with the current collecting end 110 to achieve the surface contact. When the first way is selected, the first clamping surface 211, the second clamping surface 221 and the current collecting end 110 are relatively simple to manufacture, which can save the manufacturing cost of the bus bar assembly.

[0060] In the second way, the bundle chuck 200 includes a first clamping surface 211 and a second clamping surface 221. A first clamping opening is formed between the first clamping surface 211 and the second clamping surface 221, and the first clamping surface 211 and the second clamping surface 221 are first arc surfaces. One side of the current collecting end 110 for connecting with the first clamping surface 211 is a second arc surface, and one side of the current collecting end 110 for connecting with the second clamping surface 221 is a second arc surface. The first arc surface is in contact with the second arc surface.

[0061] The first clamping surface 211 and the second clamping surface 221 can both be the arc surfaces of the arc-shaped protrusions provided on the bundle chuck 200. Correspondingly, the side of the current collecting end 110 for connecting with the first clamping surface 211 is the wall of the arc-shaped groove provided on the bus bar 100, and the side of the current collecting end 110 for connecting with the second clamping surface 221 is also the wall of the arc-shaped groove.

[0062] Alternatively, the first clamping surface 211 and the second clamping surface 221 can both be the walls of the arc-shaped grooves provided on the bundle chuck 200. Correspondingly, the side of the current collecting end 110 for connecting with the first clamping surface 211 is the arc surface of the arc-shaped protrusion provided on the bus bar 100, and the side of the current collecting end 110 for connecting with the second clamping surface 221 is also the arc surface of the arc-shaped protrusion.

[0063] In the second method, the first clamping surface 211 is the first arc surface, and the side of the current collecting end 110 connected to the first clamping surface 211 is the second arc surface. When the bundle chuck 200 is connected to the bus bar 100, the first clamping surface 211 can be in arc surface contact with the current collecting end 110 to achieve surface contact between the two. Similarly, the second clamping surface 221 is the first arc surface, and the side of the current collecting end 110 connected to the second clamping surface 221 is the second arc surface. When the bundle chuck 200 is connected to the bus bar 100, the second clamping surface 221 can be in arc surface contact with the current collecting end 110 to achieve surface contact between the two.

[0064] When the second method is selected, the first arc surface can be a convex arc surface or a concave arc surface, and the second arc surface can be a concave arc surface or a convex arc surface. When the bundle chuck 200 is connected to the bus bar 100, the convex arc surface and the concave arc surface are in contact with each other, which can not only achieve surface contact, but also the cooperation between the convex and the concave groove can make the connection between the bundle chuck 200 and the bus bar 100 more stable, reduce the probability of the problem that the bundle chuck 200 falls off from the bus bar 100, and increase the use reliability of the bus bar assembly.

[0065] When the second method is selected, the curvature of the first arc surface can be less than the curvature of the second arc surface, or the curvature of the first arc surface can be equal to the curvature of the second arc surface.

[0066] When the curvature of the first arc surface is less than the curvature of the second arc surface, the bending degree of the first arc surface is less than the bending degree of the second arc surface. In this case, a part of the arc surface of the first arc surface is in surface contact with the second arc surface, and another part of the arc surface of the first arc surface is not in contact with the second arc surface.

[0067] When the curvature of the first arc surface is equal to the curvature of the second arc surface, the bending degree of the first arc surface is the same as the bending degree of the second arc surface. In this case, the first arc surface and the second arc surface can be in surface contact everywhere.

[0068] In summary, the bending degrees of the first arc surface and the second arc surface can be selected according to actual manufacturing requirements. The curvature of the second arc surface can be greater than or equal to that of the first arc surface. In this way, when the bundle chuck 200 is connected to the busbar 100, the first clamping surface 211 and the second clamping surface 221 can be fitted to the busbar end 110, ensuring that the bundle chuck 200 can achieve surface contact with the busbar 100.

[0069] Figure 2 It is an exploded view of the busbar provided by an embodiment of the present application. Figure 3 It is a schematic structural diagram of the first row provided by an embodiment of the present application. Figure 4 It is a schematic structural diagram of the second row provided by an embodiment of the present application.

[0070] As Figures 1 to 4 shown, the busbar end 110 is provided with a convex block 111. The first clamping opening is provided with a limiting groove 240 that cooperates with the convex block 111. When the bundle chuck 200 is connected to the busbar end 110, the convex block 111 is located in the limiting groove 240 to prevent the bundle chuck 200 from falling off the busbar 100.

[0071] The convex block 111 can be a convex structure provided on the side of the busbar end 110 close to the bundle chuck 200. At least one of the side of the busbar end 110 facing the first clamping surface 211 and the side of the busbar end 110 facing the second clamping surface 221 can be provided with the convex block 111.

[0072] When the convex block 111 is provided on the side of the busbar end 110 facing the first clamping surface 211, the limiting groove 240 can be a groove structure provided on the first clamping surface 211. When the convex block 111 is provided on the side of the busbar end 110 facing the second clamping surface 221, the limiting groove 240 can also be a groove structure provided on the second clamping surface 221.

[0073] When the bundle chuck 200 is connected to the busbar 100, the first clamping surface 211 and the second clamping surface 221 are respectively fitted to the busbar end 110. At this time, the convex block 111 is located in the limiting groove 240.

[0074] Through the above settings, the convex block 111 is provided on the busbar end 110, and the limiting groove 240 is provided in the first clamping opening. When the bundle chuck 200 is connected to the busbar 100, the convex block 111 can cooperate with the limiting groove 240 to limit the movement of the bundle chuck 200, reducing the probability of the problem that the bundle chuck 200 falls off the busbar 100 when the drawer-type circuit breaker shakes or collides, and increasing the use reliability of the drawer-type circuit breaker.

[0075] Please continue to refer to Figures 1 to 4As shown, the bundle clamp 200 includes a first conductive component 210, a connector 230 and a second conductive component 220. One end of the connector 230 is connected to the first conductive component 210, and the other end of the connector 230 is connected to the second conductive component 220. The connector 230 is located in the first clamp. A groove 112 is provided on one side of the bus terminal 110 facing the connector 230.

[0076] The first conductive component 210 may be composed of a plurality of conductive sheets and a fixed axis, and the first clamping surface 211 may be disposed on a side of the first conductive component 210 facing the second conductive component. The second conductive component 220 may be composed of a plurality of conductive sheets and a fixed axis, and the second clamping surface 221 may be disposed on a side of the second conductive component 220 facing the first conductive component 210.

[0077] The connector 230 may be disposed between the first conductive component 210 and the second conductive component 220, and the first conductive component 210 and the second conductive component 220 may be symmetrically disposed with the connector 230 as a symmetry axis. In this way, a gap may be generated between the first conductive component 210 and the second conductive component 220, so that a first clamping opening is formed between the first clamping surface 211 and the second clamping surface 221.

[0078] The cut groove 112 may be a groove provided on a side of the bus terminal 110 facing the connector 230 , and the cut groove 112 may penetrate a side wall of the bus terminal 110 facing the connector 230 .

[0079] Through the above arrangement, the connecting member 230 is combined with the first conductive component 210 and the second conductive component 220 to form the bundle clamp 200, so that a gap is generated between the first conductive component 210 and the second conductive component 220, thereby forming a first clamp for connecting with the busbar 100. By providing a slot 112 on the side of the busbar 110 facing the connecting member 230, the gap between the busbar 110 and the connecting member 230 can be increased, so that a channel is generated between the busbar 110 and the connecting member 230, and air can flow through the channel. In this way, the circulating air can take away part of the heat generated between the busbar 110 and the bundle clamp 200, thereby reducing the temperature rise of the busbar assembly, reducing the probability of the internal components of the drawer-type circuit breaker being damaged due to high temperature, and improving the service life of the drawer-type circuit breaker.

[0080] Please continue to refer to Figures 2 to 4 As shown, the busbar 100 includes a first row 130 and a second row 140 connected to each other. The slots 112 are disposed at the busbar ends 110 of the first row 130 and / or the busbar ends 110 of the second row 140.

[0081] The first row 130 can be plate-shaped, and the second row 140 can also be plate-shaped. When the first row 130 and the second row 140 are combined to form the bus bar 100, the first row 130 and the second row 140 are in contact with each other.

[0082] The first row 130 can be plate-shaped, and the second row 140 can be bent. When the first row 130 and the second row 140 are combined to form the bus bar 100, the bus bar ends 110 of the first row 130 are in contact with the bus bar ends 110 of the second row 140, and there is a gap between the connection ends 120 of the first row 130 and the connection ends 120 of the second row 140, and this gap can be inserted by an external conductive member.

[0083] The first row 130 can be bent, and the second row 140 can be plate-shaped. When the first row 130 and the second row 140 are combined to form the bus bar 100, the bus bar ends 110 of the first row 130 are in contact with the bus bar ends 110 of the second row 140, and there is a gap between the connection ends 120 of the first row 130 and the connection ends 120 of the second row 140, and this gap can be inserted by an external conductive member.

[0084] The cut groove 112 can be a groove provided on the first row 130 close to the first clamping port side, or the cut groove 112 can be a groove provided on the second row 140 close to the first clamping port. The first row 130 can be provided with the cut groove 112 alone, and the second row 140 can also be provided with the cut groove 112 alone. Or, the cut groove 112 can be provided on both the first row 130 and the second row 140, and the cut groove 112 provided on the first row 130 can communicate with the cut groove 112 provided on the second row 140.

[0085] By the above settings, the bus bar 100 is set in the form of a combination of the first row 130 and the second row 140, which can reduce the manufacturing difficulty of the bus bar 100 during the manufacturing of the bus bar 100. The first row 130 and the second row 140 can be manufactured by a simple mold, and finally the first row 130 and the second row 140 are combined to form the bus bar 100. In this way, while reducing the manufacturing difficulty of the bus bar 100, the manufacturing cost of the bus bar 100 is also reduced, thereby reducing the use cost of the drawer-type circuit breaker.

[0086] Figure 5 This is the assembly drawing of the bus bar provided by the embodiment of the present application. As Figures 3 to 5 , the first row 130 is provided with a limiting portion 131, and the second row 140 is provided with a restricted portion 141. When the first row 130 and the second row 140 are combined to form the bus bar 100, the limiting portion 131 and the restricted portion 141 cooperate to limit the relative positions of the first row 130 and the second row 140.

[0087] The limiting part 131 can be a convex structure provided by the first row 130 facing the second row 140, and the restricted part 141 can be a groove structure provided by the second row 140 facing the first row 130. Alternatively, the limiting part 131 can be a groove structure provided by the first row 130 facing the second row 140, and the restricted part 141 can be a convex structure provided by the second row 140 facing the first row 130.

[0088] The convex structure can be adapted to the groove structure so that when the first row 130 and the second row 140 are combined to form the bus bar 100, the convex structure can cooperate with the groove structure to limit the relative positions of the first row 130 and the second row 140.

[0089] Through the above settings, by providing the limiting part 131 on the first row 130 and the restricted part 141 cooperating with the limiting part 131 on the second row 140, not only can the relative positions of the first row 130 and the second row 140 be limited by the cooperation between the limiting part 131 and the restricted part 141, improving the reliability of use of the bus bar 100. And it can also play a guiding role for the first row 130 and the second row 140 during the assembly of the first row 130 and the second row 140, reducing the assembly difficulty of the bus bar 100.

[0090] Figure 6 This is the assembly drawing of the bus bar assembly and the contact row provided by the embodiment of the present application. As Figure 1 and Figure 6 shown, the draw-out circuit breaker includes a circuit breaker body, the circuit breaker body includes a contact row 300, the contact row 300 is connected to the bundle chuck 200, and the bundle chuck 200 includes a second clamping opening. The bundle chuck 200 includes a third clamping surface 212 and a fourth clamping surface 222, a second clamping opening is formed between the third clamping surface 212 and the fourth clamping surface 222, and the third clamping surface 212 and the fourth clamping surface 222 are flat surfaces. The side of the contact row 300 for connecting to the third clamping surface 212 is a flat surface, and the side of the contact row 300 for connecting to the fourth clamping surface 222 is a flat surface.

[0091] The second clamping opening is opposite to the first clamping opening in position. The third clamping surface 212 can be provided at the other end of the first conductive component 210, and the fourth clamping surface 222 can be provided at the other end of the second conductive component 220. Due to the setting of the connecting member 230, a second clamping opening can be formed between the third clamping surface 212 and the fourth clamping surface 222.

[0092] When the contact row 300 is connected to the bundle chuck 200, both the third clamping surface 212 and the fourth clamping surface 222 are in contact with the contact row 300.

[0093] With the above settings, the third clamping surface 212 is a flat surface, and the side of the contact row 300 connected to the third clamping surface 212 is a flat surface. When the bundle-shaped chuck 200 is connected to the contact row 300, the third clamping surface 212 can be fitted with the contact row 300 to achieve surface contact. The fourth clamping surface 222 is a flat surface, and the side of the contact row 300 connected to the fourth clamping surface 222 is a flat surface. When the bundle-shaped chuck 200 is connected to the contact row 300, the fourth clamping surface 222 can be fitted with the contact row 300 to achieve surface contact. Such a setting can increase the area of current flow when current flows from the bundle-shaped chuck 200 into the contact row 300, thereby reducing the temperature rise at the connection between the bundle-shaped chuck 200 and the contact row 300, and reducing the probability of problems that reduce the service life of the draw-out circuit breaker due to excessive temperature of the internal components of the draw-out circuit breaker.

Claims

1. A busbar assembly, applied to a drawer-type circuit breaker, characterized in that The busbar assembly includes: A busbar, including a busbar end and a connection end, and the connection end is used for electrically connecting with an external conductive member; A bundle chuck, including a first clamping opening, the first clamping opening is connected to the busbar end, and there is a surface contact between the first clamping opening and the busbar end.

2. The busbar assembly according to claim 1, wherein, The bundle chuck includes a first clamping surface and a second clamping surface, and the first clamping opening is formed between the first clamping surface and the second clamping surface, and the first clamping surface and the second clamping surface are flat surfaces; The side of the busbar end for connecting with the first clamping surface is a flat surface, and the side of the busbar end for connecting with the second clamping surface is a flat surface.

3. The busbar assembly according to claim 1, wherein, The bundle chuck includes a first clamping surface and a second clamping surface, and the first clamping opening is formed between the first clamping surface and the second clamping surface, and the first clamping surface and the second clamping surface are first arc surfaces; The side of the busbar end for connecting with the first clamping surface is a second arc surface, and the side of the busbar end for connecting with the second clamping surface is a second arc surface; The first arc surface and the second arc surface are in fit with each other.

4. The busbar assembly according to claim 3, characterized in that, The curvature of the first arc surface is less than the curvature of the second arc surface, or the curvature of the first arc surface is equal to the curvature of the second arc surface.

5. The busbar assembly according to claim 1, wherein, The busbar end is provided with a convex block; The first clamping opening is provided with a limiting groove for cooperating with the convex block; When the bundle chuck is connected to the busbar end, the convex block is located in the limiting groove to prevent the bundle chuck from falling off the busbar.

6. The busbar assembly according to claim 1, wherein, The bundle chuck includes a first conductive component, a connecting member and a second conductive component, one end of the connecting member is connected to the first conductive component, the other end of the connecting member is connected to the second conductive component, and the connecting member is located in the first clamping opening; A cutting groove is provided on the side of the busbar end facing the connecting member.

7. The busbar assembly according to claim 6, characterized in that, The busbar includes a first row and a second row which are connected to each other; The cutting groove is arranged at the busbar end of the first row and / or the busbar end of the second row.

8. The busbar assembly according to claim 7, wherein, The first row is provided with a limiting portion, and the second row is provided with a restricted portion; When the first row and the second row are combined to form a busbar, the limiting portion and the restricted portion cooperate to limit the relative positions of the first row and the second row.

9. The busbar assembly according to any one of claims 1-8, characterized in that, The drawer-type circuit breaker includes a circuit breaker body, the circuit breaker body includes a contact row, the contact row is connected to the bundle chuck, and the bundle chuck includes a second clamping opening; The bundle chuck includes a third clamping surface and a fourth clamping surface, and the second clamping opening is formed between the third clamping surface and the fourth clamping surface, and the third clamping surface and the fourth clamping surface are flat surfaces; The side of the contact row for connecting with the third clamping surface is a flat surface, and the side of the contact row for connecting with the fourth clamping surface is a flat surface.

10. A drawer-type circuit breaker, characterized in that, It includes a circuit breaker body and the busbar assembly according to any one of claims 1 to 9; The circuit breaker body is electrically connected to an external conductive member through the busbar assembly.

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