A bridge contact combination

Abstract

The application discloses a bridge contact combination, which comprises a drawer seat busbar and two conductive buses, the two conductive buses are arranged on two sides of the drawer seat busbar in the thickness direction, and one end of each of the two conductive buses is fastened to the drawer seat busbar through a fastening structure; the other end of each of the two conductive buses extends in a direction away from the drawer seat busbar to form an elastic clamping opening; a mounting member is arranged on the drawer seat busbar and used for fastening with a drawer seat; and a reserved hole is arranged on the drawer seat busbar and used for connecting with an external busbar; and the application has the characteristics of small contact resistance and low temperature rise.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, specifically to the field of withdrawable circuit breakers, and more specifically to a bridge contact assembly. Background Technology

[0002] Draw-out circuit breakers are a type of universal circuit breaker and belong to the category of low-voltage electrical switches, generally available in various current ratings. They are called draw-out circuit breakers because the circuit breaker body can be withdrawn. In existing draw-out circuit breakers, the main busbar on the circuit breaker body is connected to the external conductive components via bridge-type contacts, as disclosed in CN115472469A, which includes a connector, circuit breaker, plug-in assembly, and circuit breaker base. This employs two sets of spaced conductive structures, with both ends forming clamp-like openings. One clamp holds the main busbar (the conductive plate of the circuit breaker body), and the other clamp holds the external conductor (external busbar). This structure is the most traditional conductive connection structure for draw-out circuit breakers, but its practical application also presents problems.

[0003] This type of clamp-on design, where both ends are clamped, offers convenient assembly for connecting the main busbar and external conductive components with a single clamp. However, the contact resistance is affected by the elasticity of the clamp and the contact area between the clamp and the conductor, as clamp-on structures are not as secure as bolted connections. If the connection is not tight, the contact resistance at this point will increase significantly, leading to the circuit breaker failing to meet temperature rise standards.

[0004] Therefore, how to design a more reasonable bridge contact combination to reduce contact resistance and product temperature rise is a question worth considering. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a bridge contact assembly.

[0006] This application provides: a bridge-type contact assembly, comprising a drawer seat busbar and two conductive bars, the two conductive bars being disposed on both sides of the drawer seat busbar in the thickness direction, and one end of the two conductive bars being fastened to the drawer seat busbar by a fastening structure; the other end of the two conductive bars extending in a direction away from the drawer seat busbar to form an elastic clamp; a mounting component is provided on the drawer seat busbar for fastening to the drawer seat; a reserved hole is provided on the drawer seat busbar for connecting to an external busbar.

[0007] In some embodiments of this application, two elastic plates are also included; in the thickness direction of the drawer seat busbar, the elastic plates are respectively disposed on the side of the conductive busbar away from the drawer seat busbar, and the elastic plates abut against the conductive busbar to provide additional clamping force for the elastic clamp; the conductivity of the conductive busbar is better than that of the elastic plates.

[0008] In some embodiments of this application, the conductive bar includes a conductive flat plate segment, a conductive bent segment, and a conductive outer edge segment. The conductive flat plate segment is fastened to the drawer seat busbar, and the elastic clamp is formed by the conductive bent segment and the conductive outer edge segment. The elastic plate includes a bonding segment and an elastic bent segment. The bonding segment is fixed on the conductive flat plate segment, and the elastic bent segment abuts against the conductive bent segment.

[0009] In some embodiments of this application, through holes are provided on the conductive bending section and / or the elastic bending section.

[0010] In some embodiments of this application, the fastening structure includes a first fastener that fastens all conductive busbars, elastic plates, and drawer seat female busbars.

[0011] In some embodiments of this application, the mounting component includes a first plate and a second plate, which are arranged at an angle; the first plate is in contact with the surface of the drawer seat mother row, and the first plate is fastened to the drawer seat mother row by a second fastener; the second plate extends in a direction away from the drawer seat mother row, and a preset hole is provided on the second plate.

[0012] In some embodiments of this application, the elastic plate has a bonding section that extends to the first plate, and a second fastener passes through the bonding section to fasten the drawer seat busbar, the elastic plate, and the first plate.

[0013] In some embodiments of this application, a gasket is also included; there is a gap between the first plate and the mating section, the gasket is disposed in the gap, and the second fastener passes through the mating section to fasten the drawer seat busbar, the elastic plate, the gasket, and the first plate.

[0014] In some embodiments of this application, the thickness of the drawer seat busbar is greater than the thickness of the conductive busbar, and the thickness of the conductive busbar is 3-6 mm.

[0015] In some embodiments of this application, the thickness of the conductive busbar is 3-6 mm, the thickness of the elastic plate is 1-2 mm, and the elasticity of the elastic plate is better than that of the conductive busbar.

[0016] The advantages of this application compared to the prior art are:

[0017] This application secures one end of the two conductive bars to the drawer seat busbar. This secure connection ensures the connection strength and contact stability at this point. Compared to a clamp structure at both ends, this effectively reduces contact resistance and lowers product temperature rise. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An axial view of a bridge contact assembly according to an embodiment of this application is shown;

[0020] Figure 2 A side view of a bridge contact assembly according to an embodiment of this application is shown;

[0021] Figure 3 An axial view of the conductive bus in an embodiment of this application is shown;

[0022] Figure 4 An axial view of the elastic plate in an embodiment of this application is shown;

[0023] Figure 5 An axial view of the mounting component is shown in an embodiment of this application;

[0024] Figure 6 A schematic diagram of an embodiment of this application applied to a withdrawable circuit breaker is shown. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0030] like Figures 1-6 As shown, an embodiment of this application is a bridge contact assembly, which is mainly used in withdrawable circuit breakers to meet the connection between the circuit breaker body and external conductive components.

[0031] This bridge-type contact assembly includes a drawer base busbar 100 and two conductive busbars 200.

[0032] Two conductive bars 200 are respectively located on both sides of the thickness direction of the drawer seat mother bar 100, and one end of the two conductive bars 200 is fastened to the drawer seat mother bar 100 by a fastening structure.

[0033] The other ends of the two conductive bars 200 extend in the direction away from the drawer seat busbar 100 to form an elastic clamp S. The clamp is used to hold the body busbar 300 of the circuit breaker body. Such a clamp can ensure that the circuit breaker body can form a conductive connection with it or disconnect the conductive connection as needed.

[0034] The elasticity of the elastic clamp S is due to the fact that the conductive busbar 200 is made of metal. Here, a tin-copper alloy is used. Besides tin-copper alloy, it can also be copper, brass, or other copper alloys, or any other material with conductivity and ductility (as long as it has a certain degree of elasticity, ensuring that the elastic clamp S can hold the main busbar 300).

[0035] The drawer seat female row 100 is provided with a mounting component 110. The mounting component 110 is used to fasten to the drawer seat. That is, after the mounting component 110 is fastened to the drawer seat female row 100, it can be fastened to the drawer seat with bolts.

[0036] Here, the mounting component 110 is an angle iron, which includes a first plate 110a and a second plate 110b, which are arranged at an angle.

[0037] Two angle irons are provided, one on each side (in the thickness direction) of the drawer seat mother row 100. The first plate 110a is attached to the surface of the drawer seat mother row 100 and is fastened to the drawer seat mother row 100 by the second fastener 120. The second fastener 120 is a rivet, but a bolt can also be used.

[0038] The second plate 110b extends away from the drawer seat mother row 100, and a pre-drilled hole 130 is provided on the second plate 110b. Such a pre-drilled hole 130 is for fastening with the drawer seat, and the fastening method can be bolt fastening.

[0039] Here, the optimal angle between the first plate 110a and the second plate 110b is 90°. Of course, any angle that can secure the first plate 110a to the conductive plate and the drawer seat is acceptable.

[0040] The drawer base busbar 100 has a reserved hole 140 for connecting to the external busbar 400. Thus, after the drawer base busbar 100 and the external busbar 400 are connected, a conductive connection is formed. When the circuit breaker body busbar 300 engages with the clamp, a conductive connection is formed between the circuit breaker body and the external busbar 400, meaning the circuit breaker is in the circuit under load.

[0041] With this structure, one end of each of the two conductive bars 200 is fastened to the drawer seat female bar 100. This fastening ensures the connection strength and contact stability at this point. Compared to a structure with clamps at both ends, it can effectively reduce contact resistance and reduce product temperature rise.

[0042] In order to improve the clamping ability of the main busbar 300, enhance stability, and further reduce the occurrence of increased contact resistance due to loose clamping.

[0043] Two elastic plates 500 are used, each abutting against a conductive bar 200. Specifically, in the thickness direction of the drawer seat female bar 100, the elastic plates 500 are located on the side of the conductive bar 200 away from the drawer seat female bar 100, and abut against the conductive bar 200 to provide additional clamping force for the elastic clamp S.

[0044] Here, the elastic plate 500 is made of stainless steel. Of course, other materials can also be used, as long as the conductivity of the conductive busbar 200 is better than that of the elastic plate 500, and the elasticity of the elastic plate 500 is better than that of the conductive busbar 200.

[0045] For the conductive busbar 200, it includes a conductive flat plate segment 210, a conductive bent segment 220, and a conductive outer edge segment 230.

[0046] The conductive plate segment 210 is fastened to the drawer seat busbar 100. This plate structure ensures that the two fit together very tightly, minimizing contact resistance caused by unstable contact.

[0047] Here, the elastic clamp S is formed by a conductive bending section 220 and a conductive outer edge section 230. The conductive bending section 220 adopts a V-shaped bend with an obtuse angle.

[0048] The elastic clamp S includes a guide area S1, a clamping area S2, and a receiving area S3.

[0049] The guide area S1 is formed by two conductive outer edge segments 230 spaced apart, and is used to guide the main body busbar 300 to be inserted into the clamping area S2.

[0050] The clamping area S2 is formed at the junction of the conductive outer edge section 230 and the conductive bending section 220, and is mainly used to clamp the main body busbar 300.

[0051] The receiving area S3 is formed by two conductive bent sections 220, which are used to insert the end of the main body busbar 300.

[0052] During installation, the main body busbar 300 enters the clamping area S2 along the guide area S1 and is clamped, and at least a portion of the main body busbar 3001 (that is, the end of the main body busbar 300) extends into the receiving area S3.

[0053] The size of the guide area S1 gradually decreases. Specifically, it gradually shrinks from the side away from the clamping area S2 to the side closer to the clamping area S2, which is more conducive to the entry of the main body busbar 300.

[0054] For the accommodation area S3, it is a space that is large in the middle and small at both ends.

[0055] The elastic plate 500 includes a bonding section 510 and an elastic bending section 520.

[0056] The bonding section 510 is fixed on the conductive plate section 210.

[0057] Here, the flexible bending section 520 also adopts a V-shaped structure, with a portion of it abutting against the conductive bending section 220.

[0058] Here, through-holes 220a are formed on the conductive bending section 220 and the elastic bending section 520, and there can be four sets of through-holes 220a. Of course, more or fewer through-holes can be formed, or they can be formed on only one of them. The through-holes 220a are designed to dissipate heat and effectively reduce temperature rise. The through-holes 220a can have many shapes, such as elongated strips or circles, as long as the shape can achieve heat dissipation.

[0059] Here, the conductive busbar 200, the elastic plate 500, and the drawer seat female busbar 100 are fastened by the first fastener 240. The first fastener 240 is a rivet, but bolts can also be used. Holes are provided at the same location on all the conductive busbars 200, elastic plates 500, and drawer seat female busbars 100, allowing the rivets to pass through for fastening. The holes are located on the conductive plate section 210 of the conductive busbar 200 and the mating section 510 of the elastic plate 500.

[0060] This structure, which fastens several components together, facilitates processing and ensures connection strength.

[0061] The mating section 510 extends above the first plate 110a, allowing the second fastener 120 to pass through it and secure the drawer seat busbar 100, the elastic plate 500, and the first plate 110a together. This further ensures the stability of the entire assembly after fastening.

[0062] In the case where there is a gap between the fitting section 510 and the first plate 110a, a gasket 600 is also provided in the gap, and the second fastener 120 passes through the fitting section 510 to fasten the drawer seat busbar 100, the elastic plate 500, the gasket 600, and the first plate 110a.

[0063] Here, the thickness of the drawer seat busbar 100 is greater than the thickness of the conductive busbar 200, which has a thickness of 3-6mm. This thickness ensures good current conduction capability.

[0064] For the elastic plate 500, its thickness is 1-2mm, which can ensure good elasticity.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A bridge-type contact assembly, characterized in that: It includes a drawer seat busbar and two conductive busbars. The two conductive busbars are respectively located on both sides of the drawer seat busbar in the thickness direction, and one end of the two conductive busbars is fastened to the drawer seat busbar by a fastening structure. The other end of the two conductive busbars extends in the direction away from the drawer seat busbar to form an elastic clamp. The drawer seat busbar is provided with a mounting component for fastening to the drawer seat. The drawer seat busbar is provided with a reserved hole for connecting to an external busbar.

2. The bridge contact assembly according to claim 1, characterized in that: It also includes two elastic plates; in the thickness direction of the drawer seat busbar, the elastic plates are respectively located on the side of the conductive busbar away from the drawer seat busbar, and the elastic plates abut against the conductive busbar to provide additional clamping force for the elastic clamps; the conductivity of the conductive busbar is better than that of the elastic plates.

3. A bridge contact assembly according to claim 2, characterized in that: The conductive bar includes a conductive flat plate segment, a conductive bent segment, and a conductive outer edge segment. The conductive flat plate segment is fastened to the drawer seat busbar. The elastic clamp is formed by the conductive bent segment and the conductive outer edge segment. The elastic plate includes a bonding segment and an elastic bent segment. The bonding segment is fixed on the conductive flat plate segment, and the elastic bent segment abuts against the conductive bent segment.

4. A bridge contact assembly according to claim 3, characterized in that: Through holes are provided on the conductive bending section and / or the elastic bending section.

5. A bridge contact assembly according to claim 2, characterized in that: The fastening structure includes a first fastener, which fastens all conductive busbars, elastic plates, and drawer seat female busbars.

6. A bridge contact assembly according to claim 2, characterized in that: The mounting components include a first plate and a second plate, which are set at an angle to each other. The first plate is in contact with the surface of the drawer seat mother row and is fastened to the drawer seat mother row by a second fastener. The second plate extends away from the drawer seat mother row and has a preset hole.

7. A bridge contact assembly according to claim 6, characterized in that: The elastic plate has a bonding section that extends to the first plate, and a second fastener passes through the bonding section to fasten the drawer seat busbar, the elastic plate, and the first plate.

8. A bridge contact assembly according to claim 7, characterized in that: It also has a gasket; there is a gap between the first plate and the mating section, the gasket is set in the gap, and the second fastener passes through the mating section to fasten the drawer seat busbar, the elastic plate, the gasket and the first plate.

9. A bridge contact assembly according to claim 1, characterized in that: The thickness of the drawer seat busbar is greater than the thickness of the conductive busbar, which is 3-6mm thick.

10. A bridge contact assembly according to claim 2, characterized in that: The thickness of the conductive busbar is 3-6mm, while the thickness of the elastic plate is 1-2mm. The elasticity of the elastic plate is superior to that of the conductive busbar.

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