A dual conversion dc contactor

Abstract

This utility model discloses a double-gang DC contactor. The moving contact is connected to the coil drive assembly, and the stationary contact is connected to the terminal block on the housing. Placement slots are provided at both ends of the housing near the contact assembly, and an outer magnet is fixedly placed in each slot. An inner magnet is located in the middle of the housing, and a positioning structure is provided to position the inner magnet. The magnetic field generated by the inner and outer magnets can drive the electric arc generated when the moving and stationary contacts separate to an empty space inside the housing. This utility model can guide the electric arc inside the contactor to an empty space inside, preventing the arc from damaging or interfering with other internal components. Simultaneously, the inner magnet is covered with insulating tape, insulating it from the copper sheet, thus ensuring the product's insulation performance. Furthermore, the four sides of the inner magnet are positioned and fixed, preventing displacement under vibration and affecting normal operation, thus ensuring the product's vibration resistance.

Description

Technical Field

[0001] This utility model relates to electrical safety equipment, specifically to a double-connector DC contactor. Background Technology

[0002] Double-pole DC contactors are used for series-parallel switching in battery packs to achieve efficient battery management, such as battery fault handling and charge / discharge management. They can also be used in applications with frequent start-stop cycles, such as DC motor control. The structure of a double-pole DC contactor mainly includes a stationary contact connected to a terminal block and a moving contact connected to a coil drive assembly. By controlling the coil drive assembly to move the moving contact, the moving contact can engage or disengage with the corresponding stationary contact. In actual use, when the moving contact contacts and separates from the stationary contact, a large electric arc is generated. This arc can easily flow within the contactor, potentially damaging internal components or interfering with their normal operation, thus affecting the normal use of the contactor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a double-connector DC contactor for solving the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution:

[0005] A double-connector DC contactor has a housing, within which a stationary contact and a moving contact are disposed. The moving contact is connected to a coil drive assembly, and the stationary contact is connected to a terminal block on the housing. The housing is characterized by having placement grooves at both ends near the contact assembly, with an outer magnet fixedly disposed within each groove. An inner magnet is disposed in the middle of the housing, and a positioning structure is provided to position the inner magnet. The magnetic fields generated by the inner and outer magnets can drive the electric arc generated when the moving and stationary contacts contact and separate to a space inside the housing.

[0006] The outer magnet sheet is glued to the placement groove.

[0007] The outer casing includes an upper cover and a bottom cover, and the placement slot is located on the outside of the upper cover.

[0008] The positioning structure includes a first copper plate and a second copper plate positioned vertically. Both the first and second copper plates are provided with stationary contacts and are connected to corresponding terminals. The first copper plate has a first positioning slot and the second copper plate has a second positioning slot. The inner magnet is inserted into the first and second positioning slots, which position the four sides of the inner magnet. The bottom of the inner magnet rests against the middle plate inside the outer shell, and the top of the inner magnet rests against the inner wall of the outer shell.

[0009] The inner magnet sheet is covered with insulating tape.

[0010] The positioning structure includes a placement portion extending inside the outer casing, and a slot is provided in the placement portion, into which the inner magnet is inserted.

[0011] The coil drive assembly includes a fixed stationary iron core, a moving iron core corresponding to the stationary iron core, a spring between the stationary iron core and the moving iron core, the stationary iron core and the moving iron core being in contact through a tapered surface, and a coil being provided on the outer ring of the moving and stationary iron cores.

[0012] The aforementioned technical solution provides a double-gang conversion DC contactor that, by placing magnets at appropriate locations within the contactor, uses the magnetic field generated by the magnets to guide the electric arc produced during the contact and separation of the moving and stationary contacts. This guides the arc to an internal void, allowing it to extinguish itself without damaging other parts of the contactor, thus ensuring the stability and reliability of the contactor's operation. Furthermore, the magnets are strategically positioned and easy to place, with six directional markings preventing positional shifts during use, improving vibration resistance. The complete isolation and insulation between the six directional magnets and the internal copper sheets ensures the product's insulation performance. Attached Figure Description

[0013] The present invention includes the following figures:

[0014] Figure 1 This is a diagram showing the external structure of the present invention.

[0015] Figure 2 This is a diagram of the internal structure of the present invention;

[0016] Figure 3 for Figure 2 View after removing the inner magnet;

[0017] Figure 4 This is a structural diagram of the top cover, the first copper sheet, and the second copper sheet of this utility model;

[0018] Figure 5 This is a structural diagram showing the placement section inside the top cover.

[0019] Figure 6 A cross-sectional view of the present invention with the placement part provided. Detailed Implementation

[0020] As shown in the figure, this utility model discloses a double-gang DC contactor with a housing. A stationary contact 8 and a moving contact are disposed within the housing. The moving contact is mounted on a moving contact piece 12, which is connected to a coil drive assembly 11. By controlling the coil drive assembly 11, the moving contact piece 12 can be moved, achieving contact or separation between the moving contact and the stationary contact 8. The stationary contact 8 is connected to a terminal block 1 on the housing. Placement slots 4 are provided at both ends of the housing near the contact assembly. An external magnet 5 is fixedly disposed within the placement slot 4. In this embodiment, the external magnet 5 is glued to the placement slot 4. Of course, besides glue, common methods such as clip-on mounting or fastener pressing can also be used for fixing. An internal magnet 6 is disposed in the middle of the housing, and a positioning structure is provided to position the internal magnet 6. The magnetic field generated by the internal and external magnets can blow the electric arc generated when the moving and stationary contacts separate into an empty space inside the housing. In this embodiment, the outer casing includes an upper cover 2 and a bottom cover 3. The placement groove 4 is located on the outside of the upper cover 2, which facilitates the installation and removal of the outer magnet sheet 5.

[0021] Furthermore, the positioning structure includes a first copper sheet 7 and a second copper sheet 9 positioned vertically. Both the first and second copper sheets are equipped with stationary contacts 8. The first and second copper sheets are connected to corresponding terminals 1. The first copper sheet 7 has a first positioning slot 13, and the second copper sheet 9 has a second positioning slot 14. The inner magnet 6 is inserted into the first and second positioning slots. The first and second positioning slots position the four sides of the inner magnet 6. The bottom of the inner magnet 6 rests against the middle plate 18 inside the outer casing, and the top of the inner magnet 6 abuts against the inner wall of the outer casing. The first and second positioning slots position the inner magnet 6 horizontally, and the middle plate and the inner wall of the outer casing cooperate to position the inner magnet 6 vertically. This achieves the fixation of the inner magnet 6 inside the contactor, effectively improving its vibration resistance. Only minor adjustments to the original structure of the first and second copper sheets and the inner wall structure of the outer casing are required, making the design highly feasible and suitable for widespread use in most contactors. Furthermore, the inner magnetic steel sheet 6 is covered with insulating tape, which is mutually insulated from the first copper sheet 7 and the second copper sheet 9, thus ensuring the insulation performance of the product.

[0022] Furthermore, the outer casing is provided with multiple positioning protrusions 16. The first copper sheet 7 is inserted into the first slot surrounded by the positioning protrusions 16. The second copper sheet 9 is provided with a second slot 10. The outer casing is provided with a positioning block 17 that can be inserted into the second slot 10 to position the second copper sheet 9.

[0023] Of course, in addition to using the above structure to position the inner magnetic steel sheet 6, a placement part 19 can also be provided inside the upper cover 2. The placement part 19 has a slot 20, and the inner magnetic steel sheet 6 is inserted into the slot 20. Using this structure to position the inner magnetic steel sheet 6, firstly, there is no need to adjust the original structure, and secondly, the inner magnetic steel sheet 6 can be directly covered by the placement part inside the upper cover 2, and its insulation performance and vibration resistance performance can be guaranteed.

[0024] Furthermore, the coil drive assembly includes a fixed stationary iron core 24, a moving iron core 22 corresponding to the stationary iron core 24, and a spring 23 between the stationary iron core 24 and the moving iron core 22. The stationary iron core 24 and the moving iron core 22 can make contact through a tapered surface engagement. In this embodiment, the moving iron core 22 is provided with a tapered protrusion, and the stationary iron core 24 is provided with a tapered groove, realizing the tapered surface contact engagement between the two. Of course, a tapered groove can also be provided on the moving iron core 22, and a tapered protrusion can be provided on the stationary iron core 24. The moving and stationary iron cores are located inside the coil frame 21, and an energized coil 25 is provided on the outside of the coil frame 21 corresponding to the moving and stationary iron cores. With this structure, the moving and stationary iron cores can achieve a tapered surface engagement structure. The tapered magnetic area is larger, which can increase its magnetic flux, thereby obtaining a greater magnetic force, strengthening the contact pressure, and effectively improving the electrical performance of the product.

[0025] This utility model discloses a double-gang DC contactor that uses magnets at appropriate locations within the contactor. The magnetic field generated by these magnets guides the electric arc produced when the moving and stationary contacts separate, blowing the arc into an internal void. This allows the arc to extinguish itself without damaging other parts of the contactor, ensuring the stability and reliability of the contactor's operation. Furthermore, the magnets are strategically positioned and easy to place. Positioning the magnets improves their vibration resistance, preventing displacement under vibration and ensuring normal operation. Additionally, the magnets are completely isolated and insulated from the internal copper sheets in all six directions, guaranteeing the product's insulation performance.

Claims

1. A double-gang DC contactor, comprising a housing, wherein a stationary contact (8) and a moving contact are disposed within the housing, the moving contact being connected to a coil drive assembly (11), and the stationary contact (8) being connected to a terminal block (1) on the housing, characterized in that: The outer shell has placement grooves (4) at both ends near the contact assembly. An outer magnetic steel sheet (5) is fixedly installed in the placement groove (4). An inner magnetic steel sheet (6) is installed in the middle of the inner shell. A positioning structure is set to position the inner magnetic steel sheet (6). The magnetic field generated by the inner and outer magnetic steel sheets can drive the electric arc generated when the moving and stationary contacts separate to blow into the empty space inside the outer shell.

2. A dual conversion DC contactor according to claim 1, characterized in that: The outer magnet (5) is glued to the placement groove (4).

3. A dual conversion DC contactor according to claim 1, wherein: The outer casing includes an upper cover (2) and a bottom cover (3), and the placement groove (4) is located on the outside of the upper cover (2).

4. A dual conversion DC contactor according to claim 1, wherein: The positioning structure includes a first copper plate (7) and a second copper plate (9) positioned vertically. Both the first and second copper plates are provided with stationary contacts (8). The first and second copper plates are connected to the corresponding terminals (1). The first copper plate (7) is provided with a first positioning slot (13), and the second copper plate (9) is provided with a second positioning slot (14). The inner magnetic steel plate (6) is inserted into the first and second positioning slots. The first and second positioning slots position the four sides of the inner magnetic steel plate (6). The bottom of the inner magnetic steel plate (6) rests on the middle plate (18) inside the outer shell, and the top of the inner magnetic steel plate (6) abuts against the inner wall of the outer shell.

5. A dual conversion DC contactor according to claim 4, wherein: The outer shell is provided with a plurality of positioning protrusions (16), the first copper sheet (7) is inserted into the first slot surrounded by the positioning protrusions (16), the second copper sheet (9) is provided with a second slot (10), and the outer shell is provided with a positioning block (17) that can be inserted into the second slot (10).

6. A dual conversion DC contactor according to claim 1 or 4, characterized in that: The inner magnetic steel sheet (6) is covered with insulating tape.

7. A dual conversion DC contactor as defined in claim 1 wherein: The positioning structure includes a placement part (19) extending inside the outer shell, and a slot (20) is provided in the placement part (19), into which the inner magnet (6) is inserted.

8. A dual conversion DC contactor according to claim 1, wherein: The coil drive assembly includes a fixed stationary iron core (24), a moving iron core (22) corresponding to the stationary iron core (24), a spring (23) between the stationary iron core (24) and the moving iron core (22), the stationary iron core (24) and the moving iron core (22) can be in contact through a tapered surface, and a coil (25) is provided on the outer ring of the moving and stationary iron cores.

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