Movable busbar and movable contact assembly of universal circuit breaker

Abstract

The utility model relates to the technical field of electrical connection devices, in particular to a movable busbar and a movable contact assembly of a universal circuit breaker. According to the movable busbar of the universal circuit breaker provided by the invention, the movable busbar comprises a first end, the first end is provided with a plurality of slots, and the plurality of slots are arranged along the circumferential direction of the first end and extend inwards from the circumferential surface of the first end. The plurality of slots are divergent from the inside of the first end to the circumferential surface. Therefore, the flexible connecting belts can be arranged loosely, the crowding phenomenon during arrangement of the flexible connecting belts is relieved, and heat dissipation is facilitated. In addition, in the prior art, when a plurality of flexible connecting belts are arranged in a crowded mode, the flexibility of the flexible connecting belts can be reduced. In some cases, the soft connection structure is not soft enough, so that the opening and closing operation of the moving contact is possibly limited. According to the invention, while a crowding phenomenon during arrangement of the flexible connection bands is reduced, the flexibility of the flexible connection structure is improved, so that smooth switching on and switching off of the moving contact are facilitated.

Description

Technical Field

[0001] This application relates to the field of electrical connection device technology, and in particular to a moving busbar and moving contact assembly of a universal circuit breaker. Background Technology

[0002] A universal circuit breaker is a protective device used in high-voltage and high-current circuits, primarily to protect power systems from overloads, short circuits, and other faults.

[0003] The moving contact assembly is one of the core components of a universal circuit breaker, responsible for controlling the opening and closing of the circuit. A typical moving contact assembly includes a connected moving busbar, a flexible connection structure, and a moving contact.

[0004] In existing technology, the moving busbar is rectangular in shape, with multiple parallel slots at one end. These slots are connected one-to-one with multiple flexible connecting strips of the flexible connection structure. Typically, the connection of multiple flexible connecting strips at the moving busbar is too concentrated, which is not conducive to heat dissipation. Utility Model Content

[0005] This application provides a moving busbar and moving contact assembly for a universal circuit breaker, which reduces the congestion phenomenon when flexible connecting strips are arranged and facilitates heat dissipation.

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

[0007] In a first aspect, this application provides a moving busbar for a universal circuit breaker. The moving busbar includes a first end, and the first end is provided with a plurality of slots. The plurality of slots are arranged circumferentially along the first end and extend from the circumferential surface of the first end toward the interior. From the interior of the first end to the circumferential surface, the plurality of slots are divergent.

[0008] Based on the universal circuit breaker moving busbar provided in the first aspect, the existing parallel slots are changed to a divergent arrangement. This allows for a looser arrangement of the flexible connecting strips, reducing congestion and improving heat dissipation. Furthermore, in the prior art, when multiple flexible connecting strips are arranged too densely, their flexibility is reduced. In some cases, insufficient flexibility in the flexible connection structure may restrict the closing and opening operations of the moving contacts. This application reduces congestion while improving the flexibility of the flexible connection structure, thereby facilitating smooth closing and opening of the moving contacts.

[0009] In one possible design, the first end is cylindrical, and slots extend from the side of the first end toward the central axis of the first end, with multiple slots arranged only on the semicircle of the first end.

[0010] Based on the moving busbar provided in this embodiment, the first end is cylindrical, and the slots extend from the side of the first end toward the central axis of the first end. Thus, from the central axis of the first end to the circumferential surface of the first end, multiple slots are arranged in a dispersed manner, which can improve the crowding phenomenon between multiple flexible connecting strips and facilitate heat dissipation.

[0011] In one possible design, the first end is also provided with a connecting slot, and multiple slots surround the connecting slot and lead to the connecting slot.

[0012] Based on the moving busbar provided in this embodiment, a connecting groove is provided at the first end, and multiple slots surround the connecting groove and lead to the connecting groove. In this way, the heat generated at the connection between the flexible connecting strip and the moving busbar can be quickly diffused through the connecting groove, which helps to reduce the temperature rise at the connection between the flexible connecting strip and the moving busbar and reduce damage caused by overheating.

[0013] In one possible design, the moving busbar is also equipped with heat dissipation holes.

[0014] Based on the moving busbar provided by this embodiment, heat dissipation holes are provided on the moving busbar, which helps to increase the heat dissipation area of ​​the moving busbar, reduce the operating temperature of the moving busbar, and thus reduce safety risks.

[0015] In one possible design, the moving busbar includes a second end, which is opposite to the first end. The heat dissipation hole extends from the end face of the second end toward the first end and is a blind hole.

[0016] Based on the moving busbar provided in this embodiment, the extension direction of the heat dissipation holes is consistent with the current flow direction, which can reduce the influence of the heat dissipation holes on the current flow direction. In addition, the heat dissipation holes are blind holes, which also helps to reduce the impact of the heat dissipation holes on the strength and current carrying capacity of the first end.

[0017] In one possible design, the moving busbar is cylindrical.

[0018] Based on the moving busbar provided in this embodiment, the cylindrical moving busbar is easy to manufacture. Furthermore, the moving busbar is cylindrical, and slots are distributed on its semicircumference. Compared to existing cuboid moving busbars, which do not have slots on their sides, this structure allows for a larger area for slots, resulting in a greater number of slots compared to existing moving busbars. Therefore, the moving busbar of this application is more material-efficient.

[0019] In one possible design, the blind hole is cylindrical in shape and is coaxially arranged with the moving busbar.

[0020] Based on the moving busbar provided by this embodiment, this design not only makes the blind hole easier to manufacture, but also, due to its cylindrical shape, the blind hole exhibits consistent performance in all directions, demonstrating good isotropy. At the same time, the cylindrical blind hole design has minimal impact on the structural strength of the moving busbar, which is beneficial to the overall structural stability and reliability.

[0021] Secondly, based on the same inventive concept, this application also provides a moving contact assembly for a universal circuit breaker, including a moving contact, a flexible connection structure, and a moving busbar.

[0022] The moving contact includes multiple moving contact pieces arranged side by side.

[0023] The flexible connection structure includes multiple flexible connection strips that correspond one-to-one with multiple moving contacts.

[0024] The moving busbar is any of the moving busbars described above. There is one or more moving busbars, which are arranged side by side. The multiple slots of one or more moving busbars correspond one-to-one with multiple flexible connecting strips.

[0025] One end of the flexible connector is welded to the moving contact piece, and the other end of the flexible connector is welded to the slot.

[0026] Based on the moving contact assembly provided in the second aspect, the moving contact assembly includes any of the moving busbars provided in this application. Its beneficial effects can be found in the beneficial effects brought about by the moving busbar and its possible implementations, and will not be repeated here.

[0027] In one possible design, there is a gap between two adjacent moving busbars, the gap being at least large enough to accommodate two flexible connecting strips.

[0028] Based on the moving contact assembly provided in this embodiment, when there is a gap between two adjacent moving busbars, and the gap is large enough to accommodate at least two flexible connecting strips, the sides of the adjacent moving busbars that are close to each other can also be connected with flexible connecting strips. This increases the ability of the moving busbars to connect flexible connecting strips, and from another perspective, it can save materials for the moving busbars and reduce costs. In addition, besides the flexible connecting strips, the remaining space between two adjacent moving busbars can also serve as a heat dissipation space, facilitating heat flow and reducing the temperature rise of the moving contact assembly.

[0029] In one possible design, when the moving busbar is cylindrical, the moving contact assembly also includes a fixing block, which has mounting through holes that correspond one-to-one with the moving busbar.

[0030] Furthermore, the fixing block includes a first part and a second part connected to each other, and a mounting through hole passes through the first part and the second part. The first part is used to fix the moving busbar inside the housing of the universal circuit breaker, and the second part is used to fill the gap between the moving busbar and the housing wall of the universal circuit breaker.

[0031] Based on the moving contact assembly provided in this embodiment, when the universal circuit breaker has two or more cylindrical moving busbars, multiple moving busbars can be installed using the same fixing block. The first part of the fixing block is fixed inside the universal circuit breaker housing, and the second part of the fixing block fills the gaps between the moving busbars and the gap between the moving busbars and the upper housing wall. This structure facilitates the installation of the moving contact assembly and prevents arc leakage. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the moving contact assembly of a universal circuit breaker in the prior art.

[0033] Figure 2 This is a schematic diagram of the moving busbar of a universal circuit breaker in the prior art.

[0034] Figure 3 This is a schematic diagram of the structure of the moving busbar of the universal circuit breaker provided in the embodiments of this application.

[0035] Figure 4 This is a schematic diagram of the structure of a flexible connecting strip provided in an embodiment of this application.

[0036] Figure 5 This is a schematic diagram of the structure of a moving contact assembly provided in an embodiment of this application.

[0037] Figure 6 for Figure 3 The end view of the first end of the moving busbar is shown.

[0038] Figure 7 for Figure 3 The diagram shows the structure of the moving busbar from another perspective.

[0039] Figure 8 This is a schematic diagram of the structure of the moving contact assembly and the housing of the universal circuit breaker provided in the embodiments of this application.

[0040] Figure 9 for Figure 8 Exploded view.

[0041] The reference numerals in the prior art are:

[0042] 1′, Moving busbar; 111′, Slot;

[0043] 2′, Flexible connection structure; 21′, Flexible connection strip;

[0044] 3′ Moving contact;

[0045] The reference numerals in the embodiments of this application are as follows:

[0046] 1. Moving busbar; 11. First end; 111. Slot; 112. Connecting slot; 12. Second end; 13. Heat dissipation hole;

[0047] 21. Flexible connecting strip; 211. First connecting end; 212. Second connecting end; 213. Middle part;

[0048] 3. Moving contact; 31. Moving contact piece;

[0049] 4. Housing; 41. Upper housing; 411. Mounting hole; 42. Lower housing;

[0050] 5. Fixing block; 51. First part; 52. Second part; 53. Mounting through hole. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0056] 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.

[0057] The present application will be described in detail below with reference to the accompanying drawings.

[0058] Figure 1 This is a schematic diagram of the moving contact assembly of a universal circuit breaker in the prior art. Figure 2 This is a schematic diagram of the moving busbar of a universal circuit breaker in the prior art.

[0059] Please refer to Figures 1 to 2 The moving contact assembly includes a moving busbar 1', a flexible connection structure 2', and a moving contact 3' connected together. The moving busbar 1' is rectangular in shape, with multiple parallel slots 111' at one end. The flexible connection structure 2' includes multiple flexible connecting strips 21', typically made of copper braided strips. One end of each copper braided strip is welded to a corresponding slot 111'. Normally, the connection of multiple flexible connecting strips 21' at the moving busbar 1' is too concentrated, resulting in a crowded arrangement that hinders heat dissipation.

[0060] In view of this, this application provides a moving busbar 1 of a universal circuit breaker, the structure of which is referenced Figure 3 .

[0061] like Figure 3 As shown, the moving busbar 1 of the universal circuit breaker provided in this application includes a first end 11, and the first end 11 is provided with a plurality of slots 111. The plurality of slots 111 are arranged circumferentially along the first end 11 and extend from the circumferential surface of the first end 11 toward the interior. From the interior of the first end 11 to the circumferential surface, the plurality of slots 111 are divergent.

[0062] Figure 4 This is a schematic diagram of the structure of a flexible connecting strip provided in an embodiment of this application. The flexible connecting strip 21 includes a first connecting end 211, a second connecting end 212, and an intermediate portion 213 located between the first connecting end 211 and the second connecting end 212.

[0063] Specifically, the first end 11 of the moving busbar 1 is the end where the moving busbar 1 connects to the flexible connecting strip 21. The slot 111 is used to insert the first connecting end 211 of the flexible connecting strip 21, and one slot 111 is used for inserting one first connecting end 211.

[0064] In this application, multiple slots 111 are arranged circumferentially along the first end 11 and extend inward from the circumferential surface of the first end 11. The multiple slots 111 are radiating outward from the interior of the first end 11 to the circumferential surface. Thus, when the first connecting ends 211 of the multiple flexible connecting strips 21 are correspondingly inserted into the multiple slots 111, the first connecting ends 211 of the multiple flexible connecting strips 21 are also radiating outward. Consequently, due to the radiating outward distribution of the first connecting ends 211 of the multiple flexible connecting strips 21, the middle portions 213 of the multiple flexible connecting strips 21 are also radiating outward, thus facilitating heat dissipation.

[0065] In summary, the moving busbar 1 provided in this application changes the arrangement of multiple slots 111 to a divergent arrangement of the existing parallel slots 111. This allows the flexible connecting strips 21 to be arranged more loosely, reducing the crowding phenomenon when the flexible connecting strips 21 are arranged and facilitating heat dissipation.

[0066] Furthermore, in the prior art, when multiple flexible connecting strips 21' are arranged too densely, their flexibility is reduced. In some cases, this can lead to insufficient flexibility in the flexible connection structure, limiting the closing and opening operation of the moving contact 3'. This application reduces the crowding phenomenon when the flexible connecting strips 21 are arranged, while improving the flexibility of the flexible connection structure, thereby facilitating the smooth closing and opening of the moving contact 3.

[0067] Please continue to refer to this. Figure 3 In some embodiments of this application, the first end 11 is cylindrical, the slot 111 extends from the side of the first end 11 toward the central axis of the first end 11, and the plurality of slots 111 are provided only on the semicircle of the first end 11.

[0068] Specifically, the first end 11 is cylindrical, and the slot 111 extends from the side of the first end 11 toward the central axis of the first end 11. Thus, from the central axis of the first end 11 to the side of the first end 11, multiple slots 111 are arranged in a dispersed manner, which can improve the crowding phenomenon between multiple flexible connecting strips 21 and facilitate heat dissipation.

[0069] Figure 5 This is a schematic diagram of a moving contact assembly provided in an embodiment of this application. The soft connection structure is not shown in the figure. Please refer to... Figure 3 , Figure 4 and Figure 5The middle portion 213 of the multiple flexible connecting strips 21 is located on one side of the moving busbar 1. The multiple slots 111 can only be set on the semicircle of the first end 11. Only in this way can the congestion between the multiple flexible connecting strips 21 be improved. If the multiple slots 111 are set on the entire circumference of the first end 11, the flexible connecting strips 21 set on the lower semicircle and the flexible connecting strips 21 on the upper semicircle will overlap when connected to the moving contact piece 31, which is not conducive to heat dissipation and the connection between the flexible connecting strips 21 and the moving contact piece 31.

[0070] It should be noted that the first end 11 is cylindrical, and the slots 111 extend from the side of the first end 11 toward its central axis. The arrangement of multiple slots 111 on only the semicircle of the first end 11 is merely one implementation of the diffusely arranged slots 111 in this application. In other embodiments of this application, the shape of the first end 11 is not limited to... Figure 4 The cylindrical shape shown can also be a semi-cylinder, a fan-shaped cylinder, an elliptical cylinder, etc., as long as it can achieve the setting of a radiating groove.

[0071] Figure 6 for Figure 3 Please refer to the end view of the first end of the moving busbar shown. Figure 3 and Figure 6 In some embodiments of this application, the first end 11 is also provided with a connecting groove 112, and a plurality of slots 111 surround the connecting groove 112 and lead to the connecting groove 112.

[0072] Generally, the contact resistance at the connection between the flexible connector 21 and the moving busbar 1 is relatively high, resulting in a higher temperature at the slot 111. This application provides a connecting groove 112 at the first end 11, with multiple slots 111 surrounding and connecting to the connecting groove 112. This allows the heat generated at the connection between the flexible connector 21 and the moving busbar 1 to dissipate quickly through the connecting groove 112, helping to reduce the temperature rise at the connection and minimizing damage caused by overheating.

[0073] It should be noted that, in Figure 6 The structure shown has a connecting groove 112 in the area surrounded by dashed lines, which is based on the cylindrical structure of the first end 11. In some other embodiments of this application, the shape of the connecting groove 112 will be adjusted accordingly as the shape of the first end 11 changes, which will not be described in detail here.

[0074] Figure 7 for Figure 3 The diagram shown is a structural schematic of the moving busbar from another perspective. Please refer to Figure 3 for details. Figure 7 In some embodiments of this application, the moving busbar 1 is also provided with heat dissipation holes 13.

[0075] Specifically, current flows through the moving contact assembly during operation. The moving busbar 1 is a current-carrying component, and heat is generated during this current flow. Providing heat dissipation holes 13 on the moving busbar 1 helps increase its heat dissipation area, reduce its operating temperature, and thus minimize safety risks.

[0076] Please continue to refer to this. Figure 3 and 7 In some embodiments of this application, the moving busbar 1 includes a second end 12, which is opposite to the first end 11. The heat dissipation hole 13 extends from the end face of the second end 12 toward the first end 11 and is a blind hole.

[0077] Specifically, the moving busbar 1 includes a first end 11 and a second end 12 facing each other. When the universal circuit breaker is closed, current flows from the first end 11 to the second end 12, or vice versa. In this application, the heat dissipation hole 13 extends from the end face of the second end 12 toward the first end 11. Thus, the extension direction of the heat dissipation hole 13 is consistent with the current flow direction, which can reduce the influence of the heat dissipation hole 13 on the current.

[0078] Furthermore, the smaller the cross-sectional area and length of the heat dissipation hole 13, the better the strength and current carrying capacity of the moving busbar 1. Conversely, the larger the cross-sectional area and length of the heat dissipation hole 13, the better the heat dissipation performance of the moving busbar 1, but the current carrying capacity and strength will decrease. Therefore, in the design, it is necessary to consider not only the overall heat dissipation area of ​​the moving busbar 1, but also the influence of the heat dissipation hole 13 on the strength and current carrying capacity of the moving busbar 1. The first end 11 is an important part connecting the moving busbar 1 to the flexible connection structure. In some embodiments of this application, the heat dissipation hole 13 is a blind hole, which helps to reduce the influence of the heat dissipation hole 13 on the strength and current carrying capacity of the first end 11.

[0079] Please continue to refer to this. Figure 4 and Figure 7 In some embodiments of this application, the moving busbar 1 is cylindrical.

[0080] Specifically, the cylindrical moving busbar 1 is easy to manufacture. Furthermore, the moving busbar 1 is cylindrical, and slots 111 are distributed on its semicircumference. Compared to the existing cuboid moving busbar 1', which does not have slots 111' on its sides, this structure allows for a larger area for the slots 111, resulting in a greater number of slots 111 compared to the existing moving busbar 1'. Therefore, the moving busbar 1 of this application is more material-efficient.

[0081] Furthermore, in some embodiments of this application, the blind hole is also cylindrical in shape and coaxially arranged with the moving busbar 1. This design not only makes the blind hole easier to manufacture, but also, due to its cylindrical shape, the blind hole exhibits consistent performance in all directions, demonstrating good isotropy. At the same time, the cylindrical blind hole design has minimal impact on the structural strength of the moving busbar 1, which is beneficial to the overall structural stability and reliability.

[0082] Please continue to refer to this. Figure 4 and Figure 5 Based on the same inventive concept, this application also provides a moving contact assembly for a universal circuit breaker. The moving contact assembly includes a moving contact 3, a flexible connection structure, and a moving busbar 1. The moving contact 3 includes a plurality of moving contact pieces 31 arranged side by side. The flexible connection structure includes a plurality of flexible connection strips 21 corresponding one-to-one with the plurality of moving contact pieces 31. The moving busbar 1 can be any of the moving busbars 1 provided in this application, and the number of moving busbars 1 can be one or more, arranged side by side, with a plurality of slots 111 of one or more moving busbars 1 corresponding one-to-one with the plurality of flexible connection strips 21. One end of the flexible connection strip 21 is welded to the moving contact piece 31, and the other end of the flexible connection strip 21 is welded to the slot 111.

[0083] Specifically, the moving contact assembly includes any of the moving busbars 1 provided in this application. Its beneficial effects can be found in the beneficial effects of the moving busbar 1 and its possible implementations, which will not be repeated here.

[0084] It should be noted that the flexible connecting strip 21 in this application can be a copper braided strip or a flexible connecting strip formed by multiple copper foils.

[0085] Please continue to refer to this. Figure 5 In some embodiments of this application, there is a gap between two adjacent moving busbars 1, and the gap is at least able to accommodate two flexible connecting strips.

[0086] For details, please refer to [link / reference]. Figure 5 When there are multiple moving busbars 1, the multiple moving busbars 1 are arranged side by side. In some cases, the slots 111 can not only be distributed on the side of the moving busbars 1 facing the moving contact 3, but can also be arranged on the side of the moving busbars 1 that are close to each other.

[0087] When there is a gap between two adjacent moving busbars 1, and the gap is large enough to accommodate at least two flexible connecting strips, the side of the adjacent moving busbars 1 that is close to each other can also be connected with flexible connecting strips. This can increase the ability of the moving busbars 1 to connect with flexible connecting strips. From another perspective, it can save the material used for the moving busbars 1 and reduce costs.

[0088] In addition, please continue to refer to Figure 5In addition to the flexible connecting strip, the remaining space between two adjacent moving busbars 1 can also serve as a heat dissipation space, facilitating heat flow and reducing the temperature rise of the moving contact assembly.

[0089] In some other embodiments of this application, a heat dissipation component may be provided between two adjacent moving busbars 1 to further promote heat flow and enhance the heat dissipation of the moving contact assembly.

[0090] Figure 8 This is a schematic diagram of the structure of the moving contact assembly and the housing of the universal circuit breaker provided in the embodiments of this application after assembly. Figure 9 for Figure 8 Please refer to the exploded view. Figure 8 and Figure 9 The housing 4 of a universal circuit breaker generally includes an upper housing 41 and a lower housing 42 that are interlocked. The moving contact 3 of the moving contact assembly and the flexible connection structure are located in the space formed by the upper housing 41 and the lower housing 42. One end of the moving busbar 1 connected to the flexible connection structure is located inside the housing, and the other end of the moving busbar 1 is located outside the housing for connecting external circuits.

[0091] Specifically, combined Figure 5 , Figure 8 and Figure 9 The upper shell 41 of the universal circuit breaker housing 4 is usually provided with a mounting hole 411 so that the moving busbar 1 can extend out of the housing and connect to the external circuit. However, after the moving contact assembly is assembled with the housing, the hole must be filled to prevent the arc from leaking from the gap when the universal circuit breaker is closing or opening.

[0092] To facilitate the installation of the moving contact assembly and prevent arc leakage, in some embodiments of this application, when the moving busbar 1 is cylindrical, the moving contact assembly further includes a fixing block 5. The fixing block 5 is provided with mounting through holes 411 corresponding one-to-one with the moving busbar 1. Furthermore, the fixing block 5 includes a first part 51 and a second part 52 connected to each other, and the mounting through holes 53 penetrate the first part 51 and the second part 52. The first part 51 is used to fix the moving busbar 1 inside the housing 4 of the universal circuit breaker, and the second part 52 is used to fill the gap between the moving busbar 1 and the housing wall of the universal circuit breaker 4.

[0093] Thus, when the universal circuit breaker has two or more cylindrical moving busbars 1, multiple moving busbars 1 can be installed using the same fixing block 5. The first part 51 of the fixing block 5 is used to fix them inside the universal circuit breaker housing 4, and the second part 52 of the fixing block 5 fills the gaps between the moving busbars 1 and the gap between the moving busbars 1 and the housing wall of the upper housing 41. This structure facilitates the installation of the moving contact assembly and prevents arc leakage.

[0094] Please continue to refer to this. Figure 8 and Figure 9 In some embodiments of this application, the mounting through hole 411 can be rectangular, and the first part 51 and the second part 52 of the fixing block 5 can be cuboids. Along the direction from the upper shell 41 to the lower shell 42, the projection of the second part 52 is located in the projection of the first part 51, and a stepped positioning surface is formed between the first part 51 and the second part 52 to facilitate the positioning of the upper shell 41.

[0095] It should be noted that the shapes of the first part 51 and the second part 52 of the fixing block 5 can also be other shapes, such as elliptical cylinders, cylinders, etc. This application does not impose any restrictions on this.

[0096] 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.

[0097] 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. A moving busbar of a universal circuit breaker, characterized in that, The moving busbar includes a first end, the first end is provided with a plurality of slots, the plurality of slots are arranged circumferentially along the first end and extend from the circumferential surface of the first end toward the interior; from the interior of the first end to the circumferential surface, the plurality of slots are divergent.

2. The moving busbar of the universal circuit breaker according to claim 1, characterized in that, The first end is cylindrical, and the slots extend from the side of the first end toward the central axis of the first end, and the plurality of slots are provided only on the semicircle of the first end.

3. The moving busbar of the universal circuit breaker according to claim 1 or 2, characterized in that, The first end is also provided with a connecting groove, and a plurality of the slots surround the connecting groove and lead to the connecting groove.

4. The moving busbar of the universal circuit breaker according to claim 3, characterized in that, The moving busbar is also provided with heat dissipation holes.

5. The moving busbar of the universal circuit breaker according to claim 4, characterized in that, The moving busbar includes a second end, which is opposite to the first end. The heat dissipation hole extends from the end face of the second end toward the first end and is a blind hole.

6. The moving busbar of the universal circuit breaker according to claim 5, characterized in that, The moving busbar is cylindrical.

7. The moving busbar of the universal circuit breaker according to claim 6, characterized in that, The blind hole is cylindrical in shape and is coaxially arranged with the moving busbar.

8. A moving contact assembly for a universal circuit breaker, characterized in that, Includes moving contacts, flexible connection structure, and moving busbar; The moving contact includes multiple moving contact pieces arranged side by side; The flexible connection structure includes multiple flexible connection strips that correspond one-to-one with multiple moving contact pieces; The moving busbar is the moving busbar according to any one of claims 1 to 7, the number of the moving busbar is one or more, the multiple moving busbars are arranged side by side, and the multiple slots of the one or more moving busbars correspond one-to-one with the multiple flexible connecting strips; One end of the flexible connecting strip is welded to the corresponding moving contact piece, and the other end of the flexible connecting strip is welded to the corresponding slot.

9. The moving contact assembly of the universal circuit breaker according to claim 8, characterized in that, There is a gap between two adjacent moving busbars, and the gap is sufficient to accommodate at least two of the flexible connecting strips.

10. The moving contact assembly of the universal circuit breaker according to claim 8, characterized in that, When the moving busbar is cylindrical, the moving contact assembly further includes a fixing block, and the fixing block is provided with mounting through holes corresponding one-to-one with the moving busbar; Furthermore, the fixing block includes a first part and a second part connected to each other, and the mounting through hole passes through the first part and the second part. The first part is used to fix the moving busbar inside the housing of the universal circuit breaker, and the second part is used to fill the gap between the moving busbar and the housing wall.

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