DC contactor

Abstract

The utility model relates to the technical field of electronic devices, and specifically discloses a DC contactor. The direct current contactor comprises an upper shell, a contactor main body and two magnetic conduction modules, the upper shell is provided with a containing groove with a downward opening, the groove bottom of the containing groove is provided with an annular insulation baffle extending in the length direction of the containing groove, the annular insulation baffle divides part of the containing groove into a first groove body and a second groove body, and the second groove body is coaxially arranged on the first groove body in a surrounding mode. The contactor main body is arranged in the first groove body, two binding posts are arranged on the top surface of the contactor main body, and the binding posts partially extend out of the accommodating groove; the magnetic conductive module is arranged in the second groove body and comprises a permanent magnet and magnetic conductive plates, the magnetic conductive plates are in a U shape, the permanent magnet is attached to a bottom plate of the magnetic conductive plates, and each magnetic conductive plate correspondingly surrounds one binding post in three directions in the horizontal plane at intervals. The DC contactor improves the insulation performance by means of the arrangement of the annular insulation baffle plate, so as to meet the performance requirements of the DC contactor in a high-insulation use scene.

Description

Technical Field

[0001] This utility model relates to the field of electronic device technology, and in particular to DC contactors. Background Technology

[0002] In the field of electrical equipment, contactors are commonly used control electrical devices. Their working principle is usually low-voltage drive to connect high-voltage circuits, and they are widely used in various circuits. However, existing DC contactors face many insulation problems in high-insulation applications, especially in special environments such as high altitudes.

[0003] On the one hand, the air pressure at high altitudes is very low, and the safe electrical clearance is approximately 14 times that at ground level. In the contactor body, apart from ceramic and plastic components, the other parts can be considered conductors, and the electrical clearance between the external terminals is far from meeting the insulation requirements at high altitudes. However, since the arc-extinguishing chamber is a sealed component, the electrical clearance of the terminals located inside the arc-extinguishing chamber is unaffected.

[0004] On the other hand, to meet the required field strength, existing technologies often use metal magnetic plates to increase the magnetic field. However, since the magnetic plate is inevitably close to the terminals, this indirectly shortens the electrical clearance between the terminals, further affecting the insulation performance of the contactor.

[0005] To address the aforementioned insulation issues, existing technologies often employ methods such as filling with adhesive or adding insulating sheets; however, these methods suffer from unreliable reliability. Within limited space and weight constraints, effectively improving the insulation capability of DC contactors has become a pressing technical challenge in this field. Utility Model Content

[0006] The purpose of this invention is to provide a DC contactor that improves insulation performance in order to meet the performance requirements of DC contactors in high insulation application scenarios.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A DC contactor includes an upper housing, a contactor body, and two magnetic conductive modules. The upper housing has a downward-opening receiving groove. The bottom of the receiving groove is provided with an annular insulating baffle extending along the length of the receiving groove. The annular insulating baffle divides part of the receiving groove into a first groove and a second groove. The second groove is coaxially arranged around the first groove. The contactor body is located in the first groove. The top surface of the contactor body is provided with two terminals, which partially extend out of the receiving groove. The magnetic conductive modules are located in the second groove. The magnetic conductive modules include permanent magnets and magnetic conductive plates. The magnetic conductive plates are U-shaped. The permanent magnets are attached to the bottom plate of the magnetic conductive plates. Each magnetic conductive plate is spaced around a terminal in three directions within a horizontal plane.

[0009] As an optional technical solution for DC contactors, the magnetic conductive module is embedded in the second slot.

[0010] As an optional technical solution for DC contactors, the permanent magnet is disposed on the side of the bottom plate of the magnetic conductive plate near the side plate of the magnetic conductive plate, the side of the permanent magnet away from the bottom plate of the magnetic conductive plate is in contact with the inner wall of the second groove, and the side of the bottom plate of the magnetic conductive plate away from the permanent magnet is in contact with the outer wall of the second groove.

[0011] As an optional technical solution for DC contactors, the annular insulating baffle is integrally formed with the upper housing.

[0012] As an optional technical solution for the DC contactor, the two terminals are arranged side by side in a first direction. An isolation main board and two isolation fins are fixed at the top of the upper housing. The plane where the isolation main board is located is perpendicular to the first direction. The two isolation fins are respectively located at both ends of one side of the isolation main board. The isolation main board and the two isolation fins surround any one of the terminals from three directions.

[0013] As an optional technical solution for DC contactors, the plane where the isolation fin is located is perpendicular to the second direction, wherein any two of the first direction, the second direction and the vertical direction are perpendicular to each other.

[0014] As an optional technical solution for DC contactors, in the vertical direction, the top of the isolation main board is higher than the top of the isolation fin.

[0015] As an optional technical solution for the DC contactor, the isolation main board is integrally formed with the upper housing; and / or, the isolation fin is integrally formed with the upper housing.

[0016] As an optional technical solution for the DC contactor, the two terminals are arranged side by side in a first direction, and the bottom of the receiving groove is provided with a partition rib, the plane of which the partition rib is located is perpendicular to the first direction; the surface of the contactor body is provided with an arc-extinguishing cover, the terminal passes through the arc-extinguishing cover, the top surface of the arc-extinguishing cover is recessed with an insulating through groove, the insulating through groove extends along a second direction and is located between the two terminals, the partition rib extends at least partially into the insulating through groove, and the gap between the partition rib and the insulating through groove is filled with insulating glue, wherein any two of the first direction, the second direction and the vertical direction are perpendicular to each other.

[0017] As an optional technical solution for the DC contactor, the DC contactor further includes a lower housing and a low-voltage drive module. The lower housing is detachably connected to the upper housing. The lower housing and the groove wall of the receiving slot form a receiving cavity. The low-voltage drive module is located in the receiving cavity and is used to control the operation of the contactor body.

[0018] The beneficial effects of this utility model are:

[0019] This DC contactor utilizes an annular insulating baffle on its upper casing to divide the receiving slot into a first slot and a second slot, respectively housing the contactor body and the magnetic module. The annular insulating baffle isolates the area containing the terminals from the area containing the magnetic module to some extent, preventing the magnetic plate from affecting the electrical clearance of the terminals. This creates a complete, effective insulating ring between the terminals and other conductors that indirectly affect their electrical insulation, laying the foundation for improved terminal insulation performance and achieving initial insulation isolation. Simultaneously, this design allows for a rational distribution of the contactor body and the magnetic module, facilitating installation and maintenance, improving structural compactness, and optimizing spatial layout. The magnetic module employs a U-shaped magnetic plate surrounding the terminals from three directions, better utilizing the magnetic field generated by the permanent magnet and the magnetic plate to enhance the electromagnetic performance of the DC contactor, meet field strength requirements, and make efficient use of the space in the second slot. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the DC contactor provided in this embodiment of the utility model;

[0021] Figure 2 This is an exploded view of the DC contactor provided in this embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional view of the DC contactor provided in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the upper outer shell provided in an embodiment of the present utility model.

[0024] In the picture:

[0025] X, first direction; Y, second direction; Z, vertical direction;

[0026] 100. Upper outer shell; 101. Assembly through hole; 110. Isolation main board; 120. Isolation fin; 130. Separating rib; 140. Annular insulating baffle;

[0027] 200. Lower outer casing;

[0028] 300. Insulating adhesive;

[0029] 400. Contactor body; 410. Terminal block; 420. Arc extinguishing chamber; 421. Insulating through slot;

[0030] 500. Permanent magnet;

[0031] 600. Magnetic plate;

[0032] 700. Insulating housing;

[0033] 800, coil module;

[0034] 900, Yoke module; 910, Magnetic cylinder; 920, Magnetic yoke. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The embodiments of this utility model 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 utility model, and should not be construed as limiting this utility model.

[0039] like Figures 1 to 4 As shown, this embodiment provides a DC contactor, including an upper housing 100, a contactor body 400, and two magnetic conductive modules. The upper housing 100 has a downward-opening receiving groove. An annular insulating baffle 140 extending along the length of the receiving groove is provided at the bottom of the groove. The annular insulating baffle 140 divides part of the receiving groove into a first groove and a second groove. The second groove is coaxially arranged around the first groove. The contactor body 400 is located in the first groove. Two terminals 410 are provided on the top surface of the contactor body 400, with portions of the terminals 410 extending out of the receiving groove. The magnetic conductive modules are located in the second groove. The magnetic conductive modules include a permanent magnet 500 and a magnetic conductive plate 600. The magnetic conductive plate 600 is U-shaped. The permanent magnet 500 is attached to the bottom plate of the magnetic conductive plate 600. Each magnetic conductive plate 600 is spaced around a terminal 410 in three directions within a horizontal plane. Specifically, the magnetic conductive plate 600 is made of metal.

[0040] This DC contactor utilizes an annular insulating baffle 140 on the upper housing 100 to divide the receiving slot into a first slot and a second slot, respectively housing the contactor body 400 and the magnetic conductive module. The annular insulating baffle, to a certain extent, isolates the area where the terminal 410 is located from the area where the magnetic conductive module is located, thus avoiding the influence of the magnetic conductive plate 600 on the electrical clearance of the terminal 410. This design creates a complete and effective insulating enclosure between the terminal 410 and other conductors that indirectly affect the safety insulation of the terminal 410, laying the foundation for improving the insulation performance of the terminal 410 and achieving preliminary insulation isolation. Simultaneously, this design allows for a reasonable distribution of the contactor body 400 and the magnetic conductive module, facilitating installation and maintenance, improving structural compactness, and optimizing spatial layout. The magnetic conductive module uses a U-shaped magnetic conductive plate 600 surrounding the terminal 410 from three directions, better utilizing the magnetic field generated by the permanent magnet 500 and the magnetic conductive plate 600, improving the electromagnetic performance of the DC contactor, meeting field strength requirements, and making reasonable use of the space in the second slot.

[0041] The horizontal plane is perpendicular to the vertical direction Z, and the openings of the two U-shaped magnetic plates 600 are positioned opposite each other.

[0042] In this embodiment, the magnetic conductive module is embedded in the second groove.

[0043] The magnetic conductive module is embedded in the second slot, which fixes the position of the magnetic conductive module in the DC contactor. This reduces the shaking or displacement caused by factors such as vibration or external impact during use, ensures the stability of the magnetic field distribution, ensures the stability of the magnetic conductive module's operation, and thus ensures the overall performance stability of the DC contactor and improves structural stability.

[0044] Furthermore, the permanent magnet 500 is disposed on the side of the bottom plate of the magnetic guide plate 600 near the side plate of the magnetic guide plate 600, the side of the permanent magnet 500 away from the bottom plate of the magnetic guide plate 600 is in contact with the inner wall of the second groove, and the side of the bottom plate of the magnetic guide plate 600 away from the permanent magnet 500 is in contact with the outer wall of the second groove.

[0045] The close fit between the permanent magnet 500 and the magnetic guide plate 600 and the inner and outer walls of the second slot allows for more precise control of the magnetic field distribution. This ensures the magnetic field acts better around the terminal 410, improving the performance of the DC contactor and achieving accurate magnetic field distribution. It also further enhances the stability of the magnetic guide module installation, ensuring a stable and enhanced magnetic field. These constraints fully utilize the space of the second slot, helping to avoid indirectly shortening the electrical clearance due to the proximity of the magnetic guide plate 600 to the terminal 410. This reduces insulation risks caused by excessively small clearances and facilitates improved overall insulation performance.

[0046] In this embodiment, the annular insulating baffle 140 is integrally formed with the upper outer shell 100.

[0047] The annular insulating baffle 140 is integrally formed with the upper outer shell 100, which simplifies the manufacturing process, reduces assembly steps, and lowers production costs. At the same time, the integrally formed structure makes the connection between the annular insulating baffle 140 and the upper outer shell 100 more robust, enhances the overall structural strength and stability of the upper outer shell 100, and helps to improve the insulation effect.

[0048] For example, two terminals 410 are arranged side by side in the first direction X, and an isolation main board 110 and two isolation fins 120 are fixed at the top of the upper housing 100. The plane where the isolation main board 110 is located is perpendicular to the first direction X, and the two isolation fins 120 are respectively located at both ends of one side of the isolation main board 110. The isolation main board 110 and the two isolation fins 120 surround any terminal 410 from three directions.

[0049] The isolation main board 110 and the two isolation fins 120 surround any terminal 410 from three directions, which can effectively prevent the breakdown between external busbars due to short electrical clearances, effectively improve the insulation safety of the external wiring of terminal 410, and thus achieve isolation protection for terminal 410.

[0050] Furthermore, the plane containing the isolation fin 120 is perpendicular to the second direction Y, wherein any two of the first direction X, the second direction Y, and the vertical direction Z are perpendicular to each other.

[0051] By defining the plane of the isolation fin 120 as perpendicular to the second direction Y, and considering the mutually perpendicular relationships between the first direction X, the second direction Y, and the vertical direction Z, the isolation structure can be precisely positioned. This further standardizes the layout of the isolation structure in three-dimensional space, allowing it to function more accurately and ensuring reliable and precise insulation protection in a specific direction. This vertical spatial layout enables the isolation main board 110 and the isolation fin 120 to more precisely surround the terminal block 410, achieving optimal isolation within a limited space.

[0052] In this embodiment, in the vertical direction Z, the top of the isolation main board 110 is higher than the top of the isolation fin 120.

[0053] In the vertical direction Z, the top of the isolation main board 110 is higher than the top of the isolation fin 120, forming a staggered isolation structure. This height difference design can further increase the electrical clearance and creepage distance between external busbars, forming a more comprehensive protective barrier, which can better block the influence of external factors on the terminal block 410 and improve the insulation performance.

[0054] In one embodiment of this invention, the isolation motherboard 110 is integrally formed with the upper outer shell 100; the isolation fin 120 is integrally formed with the upper outer shell 100.

[0055] The isolation main board 110 and the isolation fin 120 are integrally formed with the upper shell 100, which not only simplifies the production process and manufacturing technology and reduces costs, but also enhances the integrity and stability of the upper shell 100 and the isolation structure, ensuring the reliability of the isolation main board 110 and the isolation fin 120, and is conducive to improving the overall insulation performance and finished product quality.

[0056] In another embodiment of this invention, only the isolation motherboard 110 and the upper housing 100 are integrally formed. In yet another embodiment of this invention, only the isolation fin 120 and the upper housing 100 are integrally formed.

[0057] In this embodiment, two terminals 410 are arranged side by side in the first direction X. A partition rib 130 protrudes from the bottom of the receiving groove, and the plane containing the partition rib 130 is perpendicular to the first direction X. An arc-extinguishing cover 420 is provided on the surface of the contactor body 400. The terminals 410 pass through the arc-extinguishing cover 420. An insulating through groove 421 is recessed on the top surface of the arc-extinguishing cover 420. The insulating through groove 421 extends along the second direction Y and is located between the two terminals 410. The partition rib 130 extends at least partially into the insulating through groove 421, and the gap between the partition rib 130 and the insulating through groove 421 is filled with insulating adhesive 300. Specifically, the partition rib 130 is made of plastic; both ends of the partition rib 130 are connected to the side wall of 140.

[0058] The dividing ribs 130 at the bottom of the receiving groove extend into the insulating through groove 421 on the top surface of the arc extinguishing cover 420, forming an interlocking isolation effect, which significantly increases the electrical clearance and creepage distance between the terminals 410. Furthermore, since the gap between the two is filled with insulating glue 300, a reliable electrical isolation effect is achieved, while also ensuring that the relative position of the arc extinguishing cover 420 and the upper outer shell 100 is fixed.

[0059] In this embodiment, the bottom of the receiving groove has two assembly through holes 101. Each terminal 410 extends into the external environment from one assembly through hole 101. The two assembly through holes 101 are located on both sides of the isolation motherboard 110 and on both sides of the partition rib 130.

[0060] For example, the DC contactor also includes a lower housing 200 and a low-voltage drive module. The lower housing 200 is detachably connected to the upper housing 100. The lower housing 200 and the groove wall of the receiving slot form a receiving cavity. The low-voltage drive module is located in the receiving cavity and is used to control the operation of the contactor body 400.

[0061] The lower outer shell 200 and the upper outer shell 100 are detachably connected, forming a cavity for installing the low-voltage drive module. This ensures the functional integrity of the DC contactor and facilitates maintenance and repair of the internal low-voltage drive module and contactor body 400, improving the ease of use and maintainability of the DC contactor. Simultaneously, the low-voltage drive module, located within the cavity, enables effective control of the contactor body 400, giving the DC contactor complete functionality and ensuring both functional integrity and ease of maintenance. The addition of the lower outer shell 200 and the low-voltage drive module, forming a complete cavity to house the low-voltage drive module, achieves functional integration of the DC contactor.

[0062] In this embodiment, the low-voltage drive module includes an insulating housing 700, a coil module 800, and a yoke module 900. The insulating housing 700 is insulatingly wrapped around the coil module 800. The yoke module 900 includes a magnetic cylinder 910 and a magnetic yoke 920. The magnetic yoke 920 forms a yoke groove. The magnetic cylinder 910 is fixed to the bottom of the yoke groove. The coil module 800 is sleeved on the magnetic cylinder 910.

[0063] The specific structure and working principle of the insulating housing 700, coil module 800 and yoke module 900 are common knowledge in the art and are well known to those skilled in the art. They are not the focus of this embodiment and will not be described in detail here.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A direct current contactor, characterized by, Comprising: An upper housing (100) having a receiving groove with an opening facing downward. An annular insulating baffle (140) extending along the length direction of the receiving groove is provided at the bottom of the receiving groove. The annular insulating baffle (140) divides part of the receiving groove into a first groove body and a second groove body, and the second groove body is coaxially arranged around the first groove body. A contactor body (400) is disposed in the first groove body. Two terminal posts (410) are provided on the top surface of the contactor body (400), and part of the terminal posts (410) extends out of the receiving groove. Two magnetic conduction modules are disposed in the second groove body. The magnetic conduction module includes a permanent magnet (500) and a magnetic conduction plate (600). The magnetic conduction plate (600) is in a U-shaped configuration. The permanent magnet (500) is attached to the bottom plate of the magnetic conduction plate (600). Each magnetic conduction plate (600) is correspondingly and spacedly arranged around the three directions of one terminal post (410) in the horizontal plane.

2. The DC contactor of claim 1, wherein The magnetic conduction module is embedded in the second groove body.

3. The DC contactor of claim 2, wherein, The permanent magnet (500) is disposed on one side of the bottom plate of the magnetic conduction plate (600) close to the side plate of the magnetic conduction plate (600). One side of the permanent magnet (500) away from the bottom plate of the magnetic conduction plate (600) is in contact with the inner groove wall of the second groove body, and one side of the bottom plate of the magnetic conduction plate (600) away from the permanent magnet (500) is in contact with the outer groove wall of the second groove body.

4. The DC contactor of claim 1, wherein The annular insulating baffle (140) is integrally formed with the upper housing (100).

5. The DC contactor of claim 1, wherein, The two terminal posts (410) are arranged side by side in a first direction (X). An isolation main board (110) and two isolation fins (120) are fixedly provided at the top end of the upper housing (100). The plane where the isolation main board (110) is located is perpendicular to the first direction (X). The two isolation fins (120) are respectively disposed at both ends on one side of the isolation main board (110). The isolation main board (110) and the two isolation fins (120) surround any one terminal post (410) from three directions.

6. The DC contactor according to claim 5, characterized in that, The plane where the isolation fin (120) is located is perpendicular to a second direction (Y). Among them, any two of the first direction (X), the second direction (Y), and the vertical direction (Z) are perpendicular to each other.

7. The DC contactor of claim 5, wherein, In the vertical direction (Z), the top end of the isolation main board (110) is higher than the top end of the isolation fin (120).

8. The DC contactor of claim 5, wherein, The isolation main board (l10) is integrally formed with the upper housing (100); and / or The isolation fin (120) is integrally formed with the upper housing (100).

9. The DC contactor of claim 1, wherein, Two terminals (410) are arranged side by side in a first direction (X). A partition rib (130) is protruding from the bottom of the receiving groove. The plane where the partition rib (130) is located is perpendicular to the first direction (X). An arc-extinguishing cover (420) is provided on the surface of the contactor body (400). The terminal (410) passes through the arc-extinguishing cover (420). An insulating through groove (421) is recessed on the top surface of the arc-extinguishing cover (420). The insulating through groove (421) extends along a second direction (Y) and is located between the two terminals (410). The partition rib (130) extends at least partially into the insulating through groove (421). The gap between the partition rib (130) and the insulating through groove (421) is filled with insulating glue (300). Any two of the first direction (X), the second direction (Y), and the vertical direction (Z) are perpendicular to each other.

10. The DC contactor according to any of claims 1-9, characterized by The DC contactor also includes a lower housing (200) and a low-voltage drive module. The lower housing (200) is detachably connected to the upper housing (100). The lower housing (200) and the groove wall of the receiving slot form a receiving cavity. The low-voltage drive module is located in the receiving cavity and is used to control the operation of the contactor body (400).

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