Direct current overload circuit breaker

Abstract

The utility model relates to a DC overload circuit breaker, comprising a pedestal, an operation assembly, two connecting assemblies and two arc extinguishing magnets, the connecting assemblies comprise a moving contact piece, a static contact piece and a wire holder, the static contact piece is connected with the wire holder, and the arc extinguishing magnets are connected with the moving contact piece. One side, facing each other, of the movable contact piece and one side, facing each other, of the static contact piece are respectively provided with a contact, the circuit breaker further comprises two magnet supports, the top of each magnet support is provided with a magnet groove matched with the corresponding arc extinguishing magnet, and the magnet supports are located between the contacts and the wire holder. According to the direct current overload circuit breaker, the two magnets are independently installed, and the contact can be conveniently aligned.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a DC overload circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, circuit breakers above 3kV are referred to as high-voltage electrical appliances.

[0003] In DC overload circuit breakers, magnets are usually placed between the contacts and the terminal block to extinguish the arc and prevent the arc generated when the contacts are in contact from affecting the terminal block. Existing DC overload circuit breakers usually have a bracket with slots at both ends inserted into the corresponding position in the circuit breaker, and the magnet is placed in the slot. The spacing of the slots at both ends of this bracket must be compatible with the circuit breaker. If there is a manufacturing error, the magnet may not be able to align with the contacts on both sides at the same time, affecting the arc extinguishing effect, and may even prevent the bracket from being installed. Utility Model Content

[0004] In summary, to overcome the shortcomings of the prior art, this utility model provides a DC overload circuit breaker with two magnets installed independently, which facilitates the alignment of the contacts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a DC overload circuit breaker, comprising a base, an operating component, a connecting component, and an arc-extinguishing magnet. Two connecting components and two arc-extinguishing magnets are provided. The connecting component includes a moving contact, a stationary contact, and a terminal block. The stationary contact is connected to the terminal block. Both the moving and stationary contacts have contacts on their opposite sides. The circuit breaker also includes two magnet supports. The top of each magnet support has a magnet groove adapted to the arc-extinguishing magnet. The magnet supports are located between the contacts and the terminal block.

[0006] With this setup, the arc-extinguishing magnet can be placed in the magnet slot during installation, and then the magnet bracket is installed between the contact and the terminal block. In this way, the arc-extinguishing magnet can attract and extinguish the electric arc generated when the two contacts come together, preventing the arc from affecting the terminal block. Each arc-extinguishing magnet is equipped with an independent magnet bracket, which can be installed independently in a suitable position. No matter how large the distance between the two contacts is, it will not affect the installation of the arc-extinguishing magnet, ensuring that the arc-extinguishing magnet is positioned in the exact center between the contact and the terminal block, thus guaranteeing the arc-extinguishing effect.

[0007] Furthermore, the bottom of the magnet bracket is provided with a plug-in plate.

[0008] With this setup, it can be easily installed by inserting a plug-in board into the appropriate position within the circuit breaker.

[0009] Furthermore, the stationary contact piece is provided with a mounting plate, and the stationary contact piece is bent into a Z-shape at both ends of the mounting plate. A gap is provided between the mounting plate and the terminal block, and the plug-in plate is plugged into the gap.

[0010] With this configuration, the gap between the mounting plate on the stationary contact piece and the terminal block serves as a slot. The plug-in plate can be inserted into this gap to achieve a stable connection. The structure is simple and ensures that the arc-extinguishing magnet is in the correct position, making alignment convenient.

[0011] Furthermore, the width of the plug plate is the same as that of the stationary contact piece.

[0012] With this setup, simply aligning the side of the plug-in plate with the side of the stationary contact plate after insertion ensures that the arc-extinguishing magnet is in the correct position, making alignment easier.

[0013] Furthermore, the base is provided with a mounting groove, and the terminal block is located in the mounting groove.

[0014] With this design, the mounting slot can limit the movement of the terminal block and the stationary contact, making the spacing between the mounting plate and the terminal block match the plug plate, so that the plug plate is more tightly and stably inserted.

[0015] Furthermore, it also includes an arc-blocking plate located on the side of the magnet bracket facing the terminal block.

[0016] With this setup, the arc-blocking plate can further prevent the electric arc from affecting the terminal block, and it works better in conjunction with the arc-extinguishing magnet. The arc-blocking plate can also be inserted into the gap between the mounting plate and the terminal block.

[0017] Furthermore, the magnet support is provided with an arc-shaped groove at the opening of the magnet slot.

[0018] With this design, the arc-shaped groove makes it easy to remove and replace the magnets in the magnet slot.

[0019] Furthermore, the arc-shaped groove is located on the side of the magnet bracket facing away from the arc-blocking plate.

[0020] This design reduces the obstruction of the magnet's magnetic force by the magnet bracket, allowing the arc-extinguishing magnet to output a greater attractive force. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the topless state of an embodiment of the present invention.

[0022] Figure 2 for Figure 1 Partial exploded view.

[0023] Figure 3 This is a schematic diagram of the installation of the arc-extinguishing magnet according to an embodiment of the present invention.

[0024] Figure 4 for Figure 3 Partial exploded view.

[0025] The labels in the diagram mean: 1. Base, 101. Mounting slot, 2. Operating component, 3. Connecting component, 301. Moving contact, 302. Stationary contact, 3021. Mounting plate, 303. Terminal block, 304. Contact, 4. Arc-extinguishing magnet, 5. Magnet bracket, 501. Magnet slot, 502. Plug-in plate, 503. Arc-shaped slot, 6. Arc-blocking plate. Detailed Implementation

[0026] This specific embodiment is merely an explanation of the present embodiment and is not intended to limit the present embodiment. After reading this specification, those skilled in the art can make modifications to the present embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present embodiment.

[0027] Referring to the accompanying drawings, this utility model provides the following technical solution: a DC overload circuit breaker, including a base 1, an operating component 2, a connecting component 3, and an arc-extinguishing magnet 4. Two connecting components 3 and two arc-extinguishing magnets 4 are provided. The connecting component 3 includes a moving contact 301, a stationary contact 302, and a terminal block 303. The stationary contact 302 is connected to the terminal block 303. Contact points 304 are provided on the opposite side of both the moving contact 301 and the stationary contact 302. The circuit breaker also includes two magnet supports 5. The top of each magnet support 5 has a magnet groove 501 adapted to the arc-extinguishing magnet 4. The magnet supports 5 are located between the contact points 304 and the terminal block 303.

[0028] With this setup, the arc-extinguishing magnet 4 can be placed in the magnet slot 501 during installation, and then the magnet bracket 5 is installed between the contact 304 and the terminal block 303. In this way, the arc-extinguishing magnet 4 can attract and extinguish the electric arc generated when the two contacts 304 are connected, preventing the electric arc from affecting the terminal block 303. Each arc-extinguishing magnet 4 is independently equipped with a magnet bracket 5, which can be installed independently in a suitable position. No matter how large the distance between the two contacts 304 is, it will not affect the installation of the arc-extinguishing magnet 4, ensuring that the arc-extinguishing magnet 4 is positioned in the exact center between the contact 304 and the terminal block 303, thus ensuring the arc-extinguishing effect.

[0029] In this preferred embodiment, the bottom of the magnet bracket 5 is provided with a plug-in plate 502.

[0030] With this setup, it can be easily installed in the appropriate position within the circuit breaker using the plug-in plate 502.

[0031] In a preferred embodiment, the stationary contact piece 302 is provided with a mounting plate 3021. The stationary contact piece 302 is bent into a Z-shape at both ends of the mounting plate 3021. A gap is provided between the mounting plate 3021 and the terminal block 303, and the plug-in plate 502 is plugged into the gap.

[0032] With this configuration, the gap between the mounting plate 3021 on the stationary contact 302 and the terminal block 303 will serve as a slot. The plug plate 502 can be inserted into this gap to achieve a stable connection. The structure is simple and ensures that the arc-extinguishing magnet 4 is in the correct position, making alignment convenient.

[0033] In this preferred embodiment, the width of the plug plate 502 is the same as that of the stationary contact piece 302.

[0034] With this setup, simply inserting the plug plate 502 and ensuring its side aligns with the side of the stationary contact piece 302 will guarantee that the arc-extinguishing magnet 4 is in the correct position, making alignment easier.

[0035] In a preferred embodiment, the base 1 is provided with a mounting groove 101, and the terminal block 303 is located in the mounting groove 101.

[0036] With this configuration, the mounting slot 101 can limit the movement of the terminal block 303 and the stationary contact piece 302, so that the distance between the mounting plate 3021 and the terminal block 303 is adapted to the plug plate 502, making the plug plate 502 more tightly and stably inserted.

[0037] In a preferred embodiment, an arc-blocking plate 6 is also included, which is located on the side of the magnet bracket 5 facing the terminal block 303.

[0038] With this configuration, the arc-blocking plate 6 can further prevent the electric arc from affecting the terminal block 303, and it works better with the arc-extinguishing magnet 4. The arc-blocking plate 6 can also be inserted into the gap between the mounting plate 3021 and the terminal block 303.

[0039] In a preferred embodiment, the magnet support 5 is provided with an arc-shaped groove 503 at the opening position of the magnet groove 501.

[0040] With this design, the arc-shaped groove 503 allows for easy removal and replacement of the magnet in the magnet groove 501.

[0041] In this preferred embodiment, the arc-shaped groove 503 is located on the side of the magnet bracket 5 facing away from the arc-blocking plate 6.

[0042] This design reduces the obstruction of the magnetic force of the magnet by the magnet bracket 5, allowing the arc-extinguishing magnet 4 to output a greater suction force.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the scope of protection of the present invention.

Claims

1. A DC overload circuit breaker, comprising a base, an operating assembly, a connecting assembly, and an arc-extinguishing magnet, wherein two of each of the connecting assembly and the arc-extinguishing magnet are provided, the connecting assembly comprising a moving contact, a stationary contact, and a terminal block, the stationary contact being connected to the terminal block, and both the moving contact and the stationary contact having contacts on their opposite sides, characterized in that: It also includes a magnet bracket, of which two magnet brackets are provided. The top of the magnet bracket is provided with a magnet groove that is adapted to the arc-extinguishing magnet. The magnet bracket is located between the contact and the terminal block.

2. A DC overload circuit breaker according to claim 1, characterized in that: The bottom of the magnet bracket is provided with a plug-in plate.

3. A DC overload circuit breaker according to claim 2, characterized in that: The stationary contact piece is provided with a mounting plate. The stationary contact piece is bent into a Z-shape at both ends of the mounting plate. A gap is provided between the mounting plate and the terminal block. The plug-in plate is plugged into the gap.

4. A DC overload circuit breaker according to claim 3, characterized in that: The width of the plug plate is the same as that of the stationary contact piece.

5. A DC overload circuit breaker according to claim 3, characterized in that: The base is provided with a magnet groove, and the terminal block is located in the magnet groove.

6. A DC overload circuit breaker according to claim 1, characterized in that: It also includes an arc-blocking plate located on the side of the magnet bracket facing the terminal block.

7. A DC overload circuit breaker according to claim 6, characterized in that: The magnet support has an arc-shaped groove at the opening of the magnet slot.

8. A DC overload circuit breaker according to claim 7, characterized in that: The arc-shaped groove is located on the side of the magnet bracket facing away from the arc-blocking plate.

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