Universal circuit breaker contact

Abstract

The utility model relates to a universal circuit breaker contact which comprises a substrate, at least one pair of conducting strip groups are symmetrically arranged on two sides of the substrate, a plugging space used for installing a circuit breaker busbar is formed between the symmetrical conducting strip groups, and each conducting strip group is formed by arranging a plurality of conducting strips in sequence. The two end faces of each conducting strip are provided with a protruding block and a groove respectively, the protruding blocks of the conducting strips abut against the bottoms of the grooves of the adjacent conducting strips, and gaps are formed between the adjacent conducting strips. By adopting the technical scheme, the adjacent conducting strips are matched through the bumps and the grooves, so that a guiding effect is achieved when the conducting strips are assembled and stacked, a plurality of independent conducting strips are connected into a rigid whole, and meanwhile, after the bumps are propped against the grooves, a gap is formed between the end surfaces of the adjacent conducting strips, so that the conducting strips are not prone to falling off. The sizes of the gaps can be controlled through the lengths and the depths of the convex blocks and the grooves, the gaps form air convection heat dissipation channels, heat in the contact can be taken away, and the heat dissipation level is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to a universal circuit breaker contact. Background Technology

[0002] Universal circuit breakers are core protection components in modern low-voltage power distribution systems. When large currents flow through their contact systems for extended periods, significant Joule heat is generated due to contact and conductor resistance. The heat dissipation capacity of the contacts directly determines the current-carrying capacity and long-term operational reliability of the circuit breaker.

[0003] In existing circuit breaker contacts, copper plates are inserted between the conductive plates to increase the effective cross-sectional area of ​​the current path and reduce the DC resistance of the entire contact, thereby reducing heat generation. However, after copper plates are installed between the dense conductive plates, it is difficult for the heat to be carried away by air convection. The heat is trapped inside the contact and cannot be dissipated in time, resulting in an overall temperature rise. Moreover, the overall assembly is difficult and costly. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing a universal circuit breaker contact that solves the problem of heat dissipation difficulties caused by filling the conductive material between the conductive sheets.

[0005] The technical solution of this utility model is as follows: A universal circuit breaker contact includes a base plate. At least one pair of conductive sheet groups are symmetrically arranged on both sides of the base plate. The symmetrical conductive sheet groups form a plug-in space for installing the circuit breaker busbar. Each conductive sheet group is composed of several conductive sheets arranged sequentially. A protrusion and a groove are respectively provided on the two end faces of the conductive sheet. The protrusion of the conductive sheet abuts against the bottom of the groove of the adjacent conductive sheet. A gap is formed between the adjacent conductive sheets. A clearance groove is opened on the end face of the conductive sheet away from the plug-in space. An elastic plate is provided in the clearance groove. The two ends of the elastic plate abut against the two side walls of the clearance groove. A connecting pin is provided on the outer side of the elastic plate. The connecting pin is installed on the base plate. Support parts are provided on the upper and lower sides of the clearance groove. The connecting pin presses the elastic plate inward, and the two ends of the elastic plate abut against the support parts.

[0006] Using the above technical solution, the cooperation between the protrusions and grooves between adjacent conductive sheets not only plays a guiding role when assembling and stacking conductive sheets, but also connects multiple independent conductive sheets into a rigid whole. At the same time, after the protrusions abut against the grooves, gaps are formed between the end faces of adjacent conductive sheets. The size of these gaps can be controlled by the length and depth of the protrusions and grooves. These gaps form air convection heat dissipation channels, which can carry away the heat inside the contacts and ensure the heat dissipation level.

[0007] The elastic plate in this design applies pressure inward when squeezed by the connecting pin. Its deformation acts synchronously on the support of each conductive sheet, thereby providing a clamping force of the same size and direction for all conductive sheets. This ensures uniform contact pressure with the circuit breaker busbar, reduces contact resistance, and allows the entire conductive sheet assembly to be fixed on the substrate. The assembly is simple, the production efficiency is high, and the product consistency is strong.

[0008] In a further embodiment of this invention, the conductive sheet has an arc-shaped groove on the end face facing the insertion / removal space for contacting and clamping the circuit breaker busbar.

[0009] With the above-mentioned further configuration, the arc-shaped groove contacts the circuit breaker busbar with the cylindrical structure, increasing the effective contact area between the two. Even after the two swing relative to each other, they can still maintain partial contact, making the connection and conduction more stable. The increase in effective contact area leads to a reduction in contact resistance and lower heat generation. At the same time, the arc-shaped structure has a natural guiding and limiting effect on the busbar, enhancing the stability of clamping and the ability to prevent slippage.

[0010] In a further embodiment of this invention, the substrate is integrally provided or fixedly connected with mounting plates at both the front and rear ends, the left and right sides of the mounting plates extend to the outside of the conductive sheet group, and connecting pins are provided on both sides of the mounting plates.

[0011] With the above-described further configuration, the mounting plate forms the skeleton of the entire contact module, providing a robust and reliable mounting point for the connecting pins.

[0012] A further improvement of this invention is that a reinforcing sheet is provided between adjacent conductive sheet groups, and the two ends of the reinforcing sheet extend to the elastic plates on both sides for connecting pins to pass through.

[0013] With the above-mentioned further configuration, the reinforcing plate connects the conductive sheet groups on the left and right sides and the elastic plate into a more robust whole, further improving the bending and deformation resistance of the contact conductive sheet group, and can be directly fixed using the existing connecting pins without the need for additional fasteners, thus not increasing the assembly complexity.

[0014] In a further improvement of this invention, limiting portions protrude from the left and right sides of the substrate, and the limiting portions are located between adjacent conductive sheet groups on the same side of the substrate.

[0015] With the above-mentioned further configuration, the limiting part can accurately position and separate multiple conductive sheet groups on the same side, preventing them from moving laterally on the substrate, and ensuring the stability of the structure and the reliability of long-term operation.

[0016] A further feature of this invention is that the conductive sheet has a slot on its inner side for inserting the substrate.

[0017] With the above-mentioned further design, the bayonet allows the conductive sheet to be quickly and accurately mounted on the substrate, providing initial positioning for the entire assembly process, simplifying assembly, and ensuring that all conductive sheets are in the same position relative to the substrate.

[0018] In a further improvement of this invention, the elastic plate is provided with several support plates on both sides, with adjacent support plates spaced apart, and each side wall of the clearance groove is supported by a corresponding support plate.

[0019] With the above further configuration, each support plate independently corresponds to a conductive sheet, thus creating a gap between each support plate that corresponds to the gap between adjacent conductive sheets. This prevents the elastic plate from blocking the gap between the conductive sheets, ensuring that the gap is unobstructed.

[0020] A further feature of this invention is that each conductive sheet is provided with at least one protrusion and at least one groove, and the number of protrusions and grooves is the same.

[0021] With the above-mentioned further configuration, the number of protrusions and grooves is the same, so that the interlocking force between adjacent conductive sheets is symmetrical and balanced in the vertical direction, preventing torque or deflection and ensuring that the conductive sheet group remains straight and moves in a consistent manner when subjected to force. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0023] Figure 2 This is an exploded view of a specific embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the conductive sheet assembly in a specific embodiment of this utility model;

[0025] Figure 4 This is a half-sectional schematic diagram of the conductive sheet assembly in a specific embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the conductive sheet in a specific embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the overall structure of the conductive sheet from another perspective in a specific embodiment of this utility model;

[0028] Figure 7 This is a schematic diagram of the overall structure of the elastic plate in a specific embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the overall structure of the substrate and mounting plate in a specific embodiment of this utility model.

[0030] In the figure: 1. Base plate; 11. Mounting plate; 12. Limiting part; 2. Conductive sheet group; 21. Conductive sheet; 211. Protrusion; 212. Groove; 213. Clearance groove; 214. Support part; 22. Arc-shaped groove; 23. Bayonet; 3. Elastic plate; 31. Support plate; 4. Connecting pin; 5. Reinforcing sheet; 6. Insertion and removal space; 7. Circuit breaker busbar. Detailed Implementation

[0031] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] like Figure 1-8 As shown, a universal circuit breaker contact includes a base plate 1. At least one pair of conductive sheet groups 2 are symmetrically arranged on both sides of the base plate 1. In this embodiment, two pairs of conductive sheet groups 2 are symmetrically arranged on both sides of the base plate 1. In practical applications, the number of conductive sheet groups 2 can be adjusted according to current capacity requirements. A plug-in space 6 for installing a circuit breaker busbar 7 is formed between the symmetrical conductive sheet groups 2. Each conductive sheet group 2 is composed of several conductive sheets 21 arranged sequentially. A protrusion 211 and a groove 212 are respectively provided on both ends of the conductive sheet 21. The protrusion 211 of the conductive sheet 21 abuts against the bottom of the groove 212 of the adjacent conductive sheet 21. This connection between the protrusion 211 and the groove... The groove 212 not only plays a guiding and positioning role when stacking conductive sheets 21, but more importantly, it connects multiple independent conductive sheets 21 into a rigid whole, enabling them to jointly resist the huge electrodynamic force generated during a short circuit. At the same time, due to the presence of the bump 211, gaps are naturally formed between the end faces of adjacent conductive sheets 21. The size of these gaps can be precisely controlled by designing the length and depth of the bump 211 and the groove 212. They form an efficient air convection heat dissipation channel, which can quickly remove the Joule heat generated inside the contact, ensuring excellent heat dissipation and fundamentally solving the problem of heat dissipation deterioration caused by filling copper sheets in the background technology.

[0034] It should be noted that each conductive sheet 21 is provided with at least one protrusion 211 and at least one groove 212. The number of protrusions 211 and grooves 212 is the same. The protrusions 211 are evenly distributed on one end face of the conductive sheet 21, and the grooves 212 are correspondingly provided on the other end face. In this embodiment, each conductive sheet 21 is provided with two protrusions 211 and two grooves 212 on both end faces. The two protrusions 211 are evenly distributed on the end face of the conductive sheet 21, and the two grooves 212 are correspondingly provided on the back of the conductive sheet 21 where the protrusions 211 are provided. Furthermore, each conductive sheet 21 may also be provided with only one protrusion 211 and one groove 212, and the protrusion 211 and the groove 212 need to be located in the middle of both end faces of the conductive sheet 21.

[0035] An anti-cavity groove 213 is provided on the side (i.e. the outer side) of the conductive sheet 21 away from the insertion / removal space 6. A long strip elastic plate 3 is disposed in the anti-cavity groove 213. The left and right ends of the elastic plate 3 abut against the two side walls of the anti-cavity groove 213 respectively. A connecting pin 4 is provided on the outer side of the elastic plate 3. The connecting pin 4 is inserted into the substrate 1.

[0036] Specifically, mounting plates 11 are integrally formed at both ends of the substrate 1. The left and right sides of the mounting plates 11 extend outward to the outside of the conductive sheet group 2, and the connecting pins 4 are inserted into the holes on both sides of the mounting plates 11.

[0037] The upper and lower sides of the clearance groove 213 form a support portion 214. When the connecting pin 4 is installed and tightened, the connecting pin 4 presses the elastic plate 3 in the direction towards the insertion / removal space 6 (i.e., inward). The elastic plate 3 undergoes elastic deformation, and its upper and lower ends press against the support portion 214. This allows the pressing action of a single connecting pin 4 to be synchronously converted into a clamping force of the same magnitude and direction acting on each conductive piece 21 through the elastic plate 3. This not only ensures that the contact pressure between all conductive pieces 21 and the inserted circuit breaker busbar 7 is uniform, effectively reducing contact resistance, but also achieves the firm fixation of the entire conductive piece group 2 to the base plate 1. The assembly process is therefore extremely simple, production efficiency is high, and product consistency is strong.

[0038] An arc-shaped groove 22 is provided on the inner end face of the conductive sheet 21 facing the insertion and removal space 6. The arc-shaped groove 22 matches the shape of the cylindrical circuit breaker busbar 7, which can significantly increase the effective contact area between the two. Even if there is slight sway, it can still maintain stable contact and make the connection more reliable. At the same time, the arc-shaped structure has a natural guiding and limiting effect on the busbar, which enhances the stability of clamping and the ability to prevent slippage.

[0039] To further enhance structural strength, a reinforcing plate 5 is provided between adjacent conductive sheet groups 2. The reinforcing plate 5 is placed on the substrate 1, with its two ends extending to the outer sides of the elastic plates 3 on both sides, and is used by connecting pins 4. The reinforcing plate 5 connects the adjacent conductive sheet groups 2 and elastic plates 3 into a more robust whole, significantly improving the contact module's resistance to bending and deformation, and eliminating the need for additional fasteners. Even with more pairs of conductive sheet groups 2, structural stability can be guaranteed.

[0040] Limiting portions 12 are provided on the left and right sides of the substrate 1. These limiting portions 12 are located between adjacent conductive sheet groups 2 on the same side of the substrate 1. The limiting portions 12 can accurately position and separate the conductive sheet groups 2, prevent them from moving laterally on the substrate 1, and ensure the long-term stability of the structure.

[0041] A slot 23 is provided on the side of the conductive sheet 21 facing the substrate 1. During assembly, the edge of the substrate 1 is inserted into the slot 23, so that the conductive sheet 21 can be quickly and accurately pre-positioned on the substrate 1, which greatly simplifies the assembly process.

[0042] Furthermore, the elastic plate 3 is provided with several independent support plates 31 on both sides, with a gap between adjacent support plates 31. Each side wall of the clearance groove 213 is connected to a support plate 31, so that each support plate 31 can independently apply force to a conductive sheet 21, better adapt to individual tolerances, and ensure the accuracy of force transmission. At the same time, the gap between the support plates 31 corresponds to the gap between the conductive sheets 21, ensuring that the heat dissipation channel is unobstructed.

[0043] Specifically, in this embodiment, the adjacent conductive sheets 21 are connected by the cooperation of the protrusion 211 and the groove 212. This not only serves as a guide when assembling and stacking the conductive sheets 21, but also connects multiple independent conductive sheets into a rigid whole. At the same time, after the protrusion 211 abuts against the groove 212, a gap is formed between the end faces of the adjacent conductive sheets 21. These gaps form an air convection heat dissipation channel, which can carry away the heat inside the contact and ensure the heat dissipation level.

[0044] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A universal circuit breaker contact, comprising a base plate (1), wherein at least one pair of conductive sheet groups (2) are symmetrically arranged on both sides of the base plate (1), and an insertion / removal space (6) is formed between the symmetrical conductive sheet groups (2), wherein each conductive sheet group (2) is composed of a plurality of conductive sheets (21) arranged sequentially, characterized in that, The conductive sheet (21) has a protrusion (211) and a groove (212) on both ends. The protrusion (211) of the conductive sheet (21) abuts against the bottom of the groove (212) of the adjacent conductive sheet (21). There is a gap between the adjacent conductive sheets (21). A clearance groove (213) is opened on the side end face of the conductive sheet (21) away from the insertion space (6). An elastic plate (3) is provided in the clearance groove (213). The two ends of the elastic plate (3) abut against the two side walls of the clearance groove (213). A connecting pin (4) is provided on the outer side of the elastic plate (3). The connecting pin (4) is installed on the base plate (1). Support parts (214) are provided on both the upper and lower sides of the clearance groove (213). The connecting pin (4) presses the elastic plate (3) inward. The two ends of the elastic plate (3) abut against the support parts (214).

2. A universal circuit breaker contact according to claim 1, characterized in that, The conductive sheet (21) has an arc-shaped groove (22) on the end face facing the insertion / removal space.

3. A universal circuit breaker contact according to claim 1, characterized in that, The substrate (1) has mounting plates (11) integrally provided or fixedly connected at both ends. The mounting plates (11) extend to the outside of the conductive sheet group (2) on the left and right sides. Connecting pins (4) are provided on both sides of the mounting plates (11).

4. A universal circuit breaker contact according to claim 3, characterized in that, A reinforcing sheet (5) is provided between adjacent conductive sheet groups (2), and the two ends of the reinforcing sheet (5) extend to the outside of the elastic plates (3) on both sides for the connecting pin (4) to pass through.

5. A universal circuit breaker contact according to claim 4, characterized in that, The substrate (1) has a limiting part (12) protruding on the left and right sides, and the limiting part (12) is located between adjacent conductive sheet groups (2) on the same side of the substrate (1).

6. A universal circuit breaker contact according to claim 1, characterized in that, The conductive sheet (21) has a slot (23) on its inner side for the substrate (1) to be inserted.

7. A universal circuit breaker contact according to claim 3, characterized in that, The elastic plate (3) is provided with several support plates (31) on both sides, with adjacent support plates (31) spaced apart, and each side wall of the clearance groove (213) is abutted by a support plate (31).

8. A universal circuit breaker contact according to claim 1, characterized in that, Each conductive sheet (21) is provided with at least one bump (211) and at least one groove (212), the number of bumps (211) and grooves (212) being the same.

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