CN220042516U

CN220042516U - Conductive busbar

Info

Publication number: CN220042516U
Application number: CN202321337478.4U
Authority: CN
Inventors: 郭顺风; 周辉; 胡晨辉; 张�林
Original assignee: Eaton Electric Ltd
Current assignee: Eaton Electric Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-11-17
Anticipated expiration: 2033-05-30

Abstract

The utility model relates to a conductive busbar configured for use in an electrical distribution product and comprising: aluminum busbar body, aluminum busbar body includes: a terminal configured to connect a cable to conduct an electric current; and a contact end provided with a composite silver contact detachably attached to the contact end for engaging the moving contact and configured to be replaced when subjected to electro-ablation by accident, and an arc striking portion configured to guide the generated arc into an arc extinguishing chamber used in cooperation with the conductive busbar. The conductive busbar provided by the utility model utilizes novel and reasonable structural design to enable the composite silver contact and the contact end to be detachably attached to realize the replacement requirement when the composite silver contact is subjected to accidental ablation, so that the integral replacement of the conductive busbar is avoided, the maintenance time is further saved, the use efficiency of a power distribution product applying the conductive busbar is improved, and meanwhile, the manufacturing cost of the product is reduced by adopting the aluminum conductive busbar.

Description

Conductive busbar

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to a conductive busbar.

Background

The conductive busbar is generally applied to power distribution products such as miniature circuit breakers, molded case circuit breakers and the like. The conductive busbar serves to carry current and connect electrical equipment in the circuit. The existing conductive busbar is basically manufactured by taking metal copper as a raw material, and the section of the existing conductive busbar is a long conductor which is generally rectangular or chamfer (round angle) rectangular, so that point discharge is avoided as much as possible. In applications, the conductive busbar may be used, for example, for connecting several adjacent electrical cabinets or for electrical connection between specific electrical distribution products inside electrical cabinets.

In the prior art, the conductive busbar is easy to generate unexpected electric ablation under frequent contact and breaking operation, which leads to damage of the conductive busbar, and the integral replacement of the conductive busbar can increase the maintenance cost, and simultaneously, as the conductive busbar is matched with other adjacent structures, the workload of disassembling and assembling the damaged conductive busbar is increased, so that the replacement, maintenance and other operations are complex and time-consuming, the use of a power distribution product applying the conductive busbar is influenced, and the working efficiency of the power distribution product is reduced.

Accordingly, there remains a need in the relevant art for improvements in conductive busbar to further optimize its performance to ameliorate or solve the problems with the prior art.

Disclosure of Invention

It is therefore an object of the present utility model to provide a conductive busbar, by which the above-mentioned disadvantages of the prior art are overcome.

To accomplish the above object, the present utility model provides a conductive busbar configured for use in a power distribution product, comprising: aluminum busbar body, aluminum busbar body includes: a terminal configured to connect a cable to conduct an electric current; and a contact end provided with a composite silver contact detachably attached thereto for engaging a moving contact and configured to be replaced when it is subjected to electro-ablation, and an arc striking portion located in the vicinity thereof, the arc striking portion being configured to guide a generated arc into an arc extinguishing chamber used in cooperation with the conductive busbar.

As a preferred embodiment, the aluminum busbar body further includes a pair of magnetism increasing guides which are substantially ring-shaped and open at the same side, the terminal and the contact end being located at two junctions of the pair of magnetism increasing guides, respectively, and extending in the same direction from the junctions, respectively, the magnetism increasing guides being configured to pass a current introduced from the terminal and guide the current to the contact end, so that the generated enhanced magnetic field effectively increases the guiding of the arc generated between the moving contact and the contact end when the contact end is broken.

As a preferred embodiment, the aluminum busbar body further includes a transition section between the terminal end and the contact end, the transition section being configured to bend and extend in a direction away from the terminal end and then bend and extend toward and into substantial co-planarity or parallelism with a plane proximate to the terminal end.

As a preferred embodiment, the contact end further includes fitting portions distributed on opposite sides of the contact end in a length direction with the composite silver contacts, the fitting portions being configured to detachably attach the conductive busbar to the power distribution product to which it is applied using a connector.

As a preferred embodiment, the contact terminal further includes a mounting portion configured in an L-shaped sheet-like structure and hollow in the interior to form a ring-like mounting portion, and the contact terminal is formed to extend from a side of the ring of the mounting portion opposite to the terminal toward the terminal.

As a preferred embodiment, the striking part is located at a side of the composite silver contact close to the arc extinguishing chamber and is configured to be able to extend into the arc extinguishing chamber at an inclined angle of 0-45 ° so that the arc extinguishing gate sheet in the arc extinguishing chamber sufficiently acts on the arc.

As a preferred embodiment, the composite silver contact is detachably attached to the contact end by means of riveting or screwing.

As a preferred embodiment, the composite silver contact is configured in a rivet-like or screw-like manner, the contact end being provided with a positioning hole, the composite silver contact being positioned relative to the contact end by being engaged to the positioning hole.

As a preferred embodiment, the composite silver contact includes: a contact portion configured to engage a contact of the movable contact; and a positioning portion configured to conform to a rod shape of the positioning hole and inserted therein to be positioned therein by riveting or screwing.

As a preferred embodiment, the contact portion of the composite silver contact is configured in a circular, oval, rectangular, square or parallelogram shape.

The conductive busbar provided by the utility model utilizes novel and reasonable structural design to enable the composite silver contact and the contact end to be detachably attached to realize the replacement requirement when the composite silver contact is subjected to accidental ablation, so that the integral replacement of the conductive busbar is avoided, the maintenance time is further saved, the use efficiency of a power distribution product applying the conductive busbar is improved, and meanwhile, the manufacturing cost of the product is reduced by adopting the aluminum conductive busbar.

Additional features and advantages of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following, or may be learned from practice of the utility model.

Drawings

Embodiments of the present utility model are described in detail below with reference to the attached drawing figures, wherein:

fig. 1 is a schematic perspective view of a conductive busbar provided by the present utility model;

fig. 2 is a front view of the conductive busbar shown in fig. 1;

fig. 3 and 4 are bottom and top views, respectively, of the conductive busbar of fig. 1;

fig. 5 and 6 are left and right views, respectively, of the conductive busbar of fig. 1;

FIG. 7 is a schematic perspective view of another conductive busbar provided by the present utility model;

FIG. 8 is a schematic perspective view of yet another conductive busbar provided by the present utility model;

fig. 9 is a schematic perspective view of still another conductive busbar according to the present utility model.

Description of the reference numerals

1-a conductive busbar; 10-aluminum busbar body; 12-terminal; 14-contact ends; 140-composite silver contacts; 141-an arc striking part; 142-fitting part; 143-a mounting part; 144-positioning holes; 145-contacts; 146-positioning part; 16-magnetism increasing guide member; 18-transition section.

Detailed Description

An exemplary scheme of the conductive busbar according to the present utility model will now be described in detail with reference to the accompanying drawings. The drawings are provided to present various embodiments of the utility model, but are not necessarily drawn to scale and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of part of components in the drawings can be adjusted according to actual requirements on the premise of not affecting the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification do not necessarily all refer to the figures or examples.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "upper", "lower" and other directional terms, will be understood to have their normal meaning and refer to those directions as they would be when viewing the drawings. Unless otherwise indicated, directional terms described in this specification are essentially in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

In this document, the terms "substantially", "substantially" and "substantially" are used to mean that the parameter or value referred to need not be exactly achieved, but that the deviation or variation (where deviation or variation includes, for example, tolerances, measurement errors, measurement accuracy limitations and other factors known to those of skill in the art) may occur in an amount that does not interfere with the effect provided by the feature in question.

Fig. 1 is a schematic front view of a conductive busbar 1 according to the present utility model, where the conductive busbar 1 can be applied to power distribution products such as miniature circuit breakers and molded case circuit breakers. As shown in fig. 1, the conductive busbar 1 includes an aluminum busbar body 10. The common conductive busbar 1 generally adopts a copper structure, however, the copper structure increases the use and maintenance cost of the product due to high material cost, especially when the conductive busbar 1 is damaged. The aluminum conductive busbar 1 can meet and meet the requirements and standards approximately equivalent to those of the copper conductive busbar 1 in terms of materials and performances.

Referring again to fig. 1, the aluminum conductive busbar 1 includes a terminal 12 and a contact end 14. The terminals 12 are configured for connecting cables to conduct external current (e.g., from other electrical distribution products or electrical equipment) to the conductive busbar 1. The contact end 14 is provided with a composite silver contact 140 and an arc striking portion 141, wherein the composite silver contact 140 is detachably attached to the contact end 14 for engaging a moving contact, and the arc striking portion 141 is arranged close to the composite silver contact 140 and is configured for guiding a generated arc into an arc extinguishing chamber of a power distribution product to which the conductive busbar 1 is applied, the arc being generated substantially when the moving contact is disconnected from the contact end 14 of the conductive busbar 1. The striking portion 141 is typically located on the side of the composite silver contact 140 near the arc chute 12 and is configured to extend into the arc chute at an oblique angle of 0-45 ° so that the arc chute blades within the arc chute are sufficient to strike the arc, e.g., in fig. 1 the striking portion 141 extends upwardly from the contact end 14 relative to the composite silver contact 140 to enter the arc chute, whereas in fig. 7-9 the striking portion 141 may form a downwardly sloping surface from the contact end 14 relative to the composite silver contact 140 and extend into the arc chute, e.g., it is inclined downwardly from the top surface of the composite silver contact 140 above the surface of the contact end 14 toward the side of the terminal 12. The inclination of the arc striking portion 141 is dependent on the position of the arc extinguishing chamber, which may be generally located slightly above or below the contact end, and the arc striking portion 141 has an inclined feature that facilitates the full introduction of the arc into the arc extinguishing chamber and the maximum action of the arc extinguishing gate therein on the arc for good extinguishing. The detachable attachment of the composite silver contact 140 to the contact end 14 allows the composite silver contact 140 to be replaced when subjected to accidental ablation, thereby avoiding the overall replacement of the conductive busbar 1, and since the composite silver contact 140 is relatively simple to install and disassemble (the number of parts involved is relatively small), maintenance time can be saved to a certain extent, improving the efficiency of use of the power distribution product to which the conductive busbar 1 is applied.

The conductive busbar 1 further comprises a pair of (two) magnetizing guides 16 located between the terminal 12 and the contact end 14. The pair of magnetically enhanced guides 16 are identical in construction and are opposed to each other. The two magnetically enhanced guides 16 may also be considered as transitions between the terminal ends 12 and the contact ends 14. The two magnetizing guides 16 are ring-shaped but open on the same side (like U-shaped) and they are joined to each other on the same side and converge, and the terminals 12 and the contact ends 14 extend in the same direction from the two junctions, respectively, for example, substantially transversely to the junction of the two magnetizing guides 16. The magnetically enhanced guide 16 is configured to pass current introduced by the terminal 12 and to guide the current to the contact end 14. The passage of current through the magnetizing guides 16 generates a magnetic field, and a pair of oppositely disposed magnetizing guides 16 can provide an enhanced magnetic field that can effectively increase the guidance of the arc generated between the moving contact and the contact end 14 (which can be regarded as a fixed contact or a fixed contact) when the two are separated, so that the arc can enter the arc extinguishing chamber to the maximum extent under the action of the striking part 141.

Fig. 2 to 6 are views of the conductive busbar 1 shown in fig. 1, viewed from various directions and angles. Specifically, fig. 2 is a front view of the conductive busbar 1 shown in fig. 1, fig. 3 and 4 are bottom and top views of the conductive busbar 1 shown in fig. 1, respectively, and fig. 5 and 6 are left and right views of the conductive busbar 1 shown in fig. 1, respectively.

As shown in fig. 2-6, the composite silver contact 140 is removably attached to the contact end 14 by riveting or screwing. Specifically, the composite silver contact 140 is configured in a rivet-like or screw-like shape, and includes a contact portion 145 and a positioning portion 146. Wherein the contact portion 145 is for engaging a contact of a moving contact, the contact portion 145 may be configured in a circular shape, an elliptical shape, a rectangular shape, a square shape, or a parallelogram shape; and the positioning portion 146 is configured to conform to a rod-like member of the positioning hole 144 mentioned below and to be engaged therein to achieve positioning.

The positioning hole 144 is provided on the contact end 14, and the threaded connection manner of the composite silver contact 140 and the contact end 14 includes a direct connection manner and an indirect connection manner of the composite silver contact 140 and the contact end 14, for example, a rod-shaped positioning portion 146 of the composite silver contact 140 is provided with threads, the positioning hole 144 is provided with threads matched with the positioning hole, and the engagement of the composite silver contact 140 and the contact end 14 is realized through the threaded engagement of the positioning portion 146 and the positioning hole 144; the positioning portion 146 of the composite silver contact 140 may be a structure with only partial threads, and the portion inserted into the positioning hole 144 may be a polished rod without threads, and the positioning hole 144 may be a polished hole, so that after the positioning portion 146 of the composite silver contact 140 is inserted into the positioning hole 144 of the contact end 14, the positioning portion 146 is engaged by an additional nut to realize positioning of the composite silver contact 140 relative to the contact end 14.

The rivet fixing of the composite silver contact 140 to the contact end 14 is achieved as follows: the positioning portion 146 of the composite silver contact 140 is inserted into the contact end 14, the length of the positioning portion 146 in the longitudinal direction is longer than the positioning hole 144, and an additional tool is used to act on the positioning portion 146 to form an abutting portion which abuts against the surface of the contact end 14 at the end and has a diameter larger than the positioning hole 144, so that the composite silver contact 140 is fixed relative to the contact end 14. The present utility model enables easy replacement of the composite silver contact 140 by removably attaching the composite silver contact 140 to the contact end 14, as opposed to conventional soldering methods of attaching contacts to contacts. The composite silver contact 140 provided by the present utility model is optionally made of an Ag/C and copper forming alloy. The riveting or screwing manner of the composite silver contact 140 and the contact end 14 satisfies the relative fixation of the composite silver contact 140 and the aluminum conductive busbar 1, because for the aluminum conductive busbar 1, the welding manner is more difficult and the performance of the conductive busbar 1 is easily affected, for example, the quality is easily affected due to oxidation, air holes, thermal cracks, burning-through or collapse during welding.

Fig. 7 is a schematic perspective view of another conductive busbar 1 according to the present utility model. The conductive busbar 1 is an alternative embodiment to the conductive busbar 1 described above. In fig. 7, the aluminum busbar body 10 of the conductive busbar 1 further comprises a transition section 18. The transition section 18 is located between the terminal 12 and the contact end 14 and is configured to bend downwardly away from the plane of the terminal 12 and extend parallel to the plane of the terminal 12 and then bend upwardly to extend substantially coplanar or parallel to the plane of the terminal 12 toward the direction proximate the terminal 12. Each bending part of the conductive busbar 1 has a certain radian, which is beneficial to avoiding the generation of tip discharge. In this embodiment, the conductive busbar 1 is of a relatively simple construction (the composite silver contact 140 is not shown in the figures, but the locating holes 144 for engaging the composite silver contact 140 are shown), which is suitable for use in space-limited electrical distribution products.

Fig. 8 is a schematic perspective view of still another conductive busbar 1 according to the present utility model. The conductive busbar 1 is a further alternative embodiment of the aforementioned conductive busbar 1. As shown in fig. 8, the contact end 14 of the aluminum busbar body 10 further includes a fitting portion 142, and the fitting portion 142 and the composite silver contact 140 are distributed on opposite sides of the contact end 14 in the length direction. The mounting portion 142 is provided with mounting holes, and a user can engage the mounting holes on the mounting portion 142 with additional connectors to attach the conductive busbar 1 to the power distribution product to which it is applied. Alternatively, the arc striking portion 141 is between the fitting portion 142 and the composite silver contact 140 and adjacent to the composite silver contact 140, and the arc striking portion 141 has an arc surface extending obliquely downward from the top surface of the composite silver contact 140 (which protrudes from the surface of the contact end 14) toward the fitting portion 142 (or the fitting surface where the mounting hole is provided).

Fig. 9 is a schematic perspective view of still another conductive busbar 1 according to the present utility model. The conductive busbar 1 is another alternative embodiment of the aforementioned conductive busbar 1. As shown in fig. 9, in this embodiment, the contact end 14 of the aluminum conductive busbar 1 further includes a mounting portion 143, the mounting portion 143 being configured as an L-shaped sheet structure and being hollow in the interior, specifically, the mounting portion 143 forming a loop-like structure. In this embodiment, the contact end 14 extends from a side of the ring-shaped mounting portion 143 (the side opposite to the terminal 12) toward the terminal 12. The end of the contact end 14 extending forms an arc striking portion 141, the arc striking portion 141 being generally trapezoidal in shape, and the composite silver contact 140 being removably positioned to the contact end 14 adjacent the arc striking portion 141. Similar to the aforementioned arc striking portion 141, the arc striking portion 141 in this embodiment also has a certain inclination angle to facilitate guiding an arc generated between the moving contact and the composite silver contact 140 of the contact end 14 to a desired position (e.g., an arc extinguishing chamber of a power distribution product).

While the utility model has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the utility model is not limited to such disclosed embodiments. Rather, the utility model can be modified by incorporating any number of variations, alterations, substitutions, or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the utility model. Further, while various embodiments of the utility model have been described, it is to be understood that aspects of the utility model may include only some of the embodiments. Accordingly, the utility model is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.

Claims

1. A conductive busbar (1), the conductive busbar (1) being configured for use in an electrical distribution product, comprising:

aluminum busbar body (10), the aluminum busbar body (10) comprising:

a terminal (12), the terminal (12) being configured for connecting a cable for introducing an electric current; and

a contact end (14), the contact end (14) being provided with a composite silver contact (140) and an arc striking portion (141) located in the vicinity thereof, the composite silver contact (140) being detachably attached to the contact end (14) for engaging a moving contact and being configured to be replaced when being subjected to electro-ablation unexpectedly, the arc striking portion (141) being configured for guiding a generated arc into an arc extinguishing chamber of the power distribution product to which the conductive busbar (1) is applied.

2. The busbar (1) according to claim 1, wherein the aluminum busbar body (10) further comprises a pair of substantially annular magnetically enhanced guides (16) open on the same side, the terminal ends (12) and the contact ends (14) being located at two junctions of a pair of the magnetically enhanced guides (16) and extending in the same direction from the junctions, respectively, the magnetically enhanced guides (16) being configured to pass a current introduced by the terminal ends (12) and to guide the current to the contact ends (14) such that the resulting enhanced magnetic field is effective to enhance the guiding of the arc generated between the moving contact and the contact ends (14) upon breaking thereof.

3. The conductive busbar (1) of claim 1, wherein the aluminum busbar body (10) further comprises a transition section (18), the transition section (18) being located between the terminal (12) and the contact end (14), the transition section (18) being configured to bend and extend in a direction away from the terminal (12) to be parallel to a plane of the terminal (12) and then bend toward a plane proximate to the terminal (12) and extend to be substantially coplanar or parallel to the plane of the terminal (12).

4. The conductive busbar (1) of claim 1, wherein the contact end (14) further comprises a fitting portion (142), the fitting portion (142) and the composite silver contact (140) being distributed on opposite sides of the contact end (14) in a length direction, the fitting portion (142) being configured to detachably attach the conductive busbar (1) to the power distribution product to which it is applied with a connector.

5. The conductive busbar (1) according to claim 1, wherein the contact terminal (14) further includes a mounting portion (143), the mounting portion (143) being configured in an L-shaped sheet-like structure and being hollow inside so as to form a ring-like mounting portion (143), the contact terminal (14) being formed extending from a side of the ring of the mounting portion (143) opposite to the terminal (12) toward the terminal (12).

6. The conductive busbar (1) according to any one of claims 2 to 5, wherein the striking portion (141) is located on a side of the composite silver contact (140) close to the arc extinguishing chamber and is configured to be able to extend into the arc extinguishing chamber at an oblique angle of 0-45 ° so that the arc extinguishing grid in the arc extinguishing chamber acts substantially on the arc.

7. The conductive busbar (1) according to claim 1, wherein the composite silver contact (140) is detachably attached to the contact end (14) by means of riveting or screwing.

8. The conductive busbar (1) according to claim 1, wherein the composite silver contact (140) is configured as a rivet-like or screw-like, the contact end (14) being provided with a positioning hole (144), the composite silver contact (140) being positioned relative to the contact end (14) by being joined to the positioning hole (144).

9. The conductive busbar (1) of claim 8, wherein the composite silver contact (140) comprises:

a contact portion (145), the contact portion (145) being configured for engaging a contact of the moving contact; and

a positioning portion (146), the positioning portion (146) being configured to conform to a rod shape of the positioning hole (144) and being inserted therein to be positioned therein by caulking or screwing.

10. The conductive busbar (1) according to claim 9, wherein the contact portion (145) of the composite silver contact (140) is configured as a circle, an ellipse, a rectangle, a square or a parallelogram.