DC contactor

Abstract

The utility model relates to the technical field of electronic devices, and specifically discloses a DC contactor. The direct current contactor is provided with a containing groove with a downward opening, and a coil module and an insulating shell are arranged in the containing groove. The coil module comprises a coil framework, a coil main body and coil outgoing lines, the coil framework is a tubular part extending in the vertical direction, the coil main body is wound on the outer side wall of the coil framework, and the outgoing ends are electrically connected with the coil outgoing lines; the insulation shell comprises an upper insulation cover, a lower insulation cover and insulation paste, the upper insulation cover covers the top surface of the coil module and part of the outer side surface of the coil module, the lower insulation cover forms a containing groove with an upward opening, the upper insulation cover partially extends into the containing groove, and the groove wall of the containing groove and the outer side surface of the coil module define an annular groove; the coil outgoing line extends out of the insulating shell from the opening of the annular groove, and the annular groove is filled with insulating glue. The DC contactor improves the insulation performance by means of the arrangement of the insulation shell, so as to guarantee the normal work and service life of the coil module.

Description

Technical Field

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

[0002] As an important electrical control component, the DC contactor typically operates by using low-voltage drive to connect high-voltage components. In existing contactor bodies, most parts, except for ceramic and plastic components, can be considered conductors.

[0003] At high altitudes (e.g., 20,000 meters), the air pressure is extremely low, and the safe electrical clearance is approximately 14 times that at ground level. The electrical clearance between the external terminals of existing contactors is far from meeting the high-altitude insulation requirements. However, since the arc-extinguishing chamber is a sealed component, the electrical clearance of the terminals inside the chamber is unaffected. Furthermore, although the terminals and coil ends employ a high- and low-voltage separation design, conductive contamination can occur in the arc-extinguishing chamber after the contactor has been used, leading to a reduction in the insulation performance between the high and low voltage levels.

[0004] To address the insulation problem of contactors, existing technologies often employ methods such as filling with adhesive or adding insulating sheets. However, in high-insulation applications, these methods are insufficient to effectively improve the insulation capability of DC contactors within limited space and weight constraints. Utility Model Content

[0005] The purpose of this invention is to provide a DC contactor that improves insulation performance to ensure the normal operation and service life of the coil module.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A DC contactor includes an upper housing with a downward-opening receiving groove. A coil module and an insulating shell are disposed within the receiving groove. The coil module includes a coil frame, a coil body, and coil leads. The coil frame is a vertically extending tubular component. The coil body is wound around the outer wall of the coil frame. The coil body has several leads, and the number of coil leads is the same as the number of leads. Each lead is electrically connected to one coil lead. The insulating shell includes an upper insulating cover, a lower insulating cover, and insulating adhesive. The upper insulating cover is located at the top of the coil module, covering the top surface of the coil module and part of the outer surface of the coil module. The lower insulating cover is located at the bottom of the coil module, forming an upward-opening storage groove. The upper insulating cover partially extends into the storage groove. The bottom surface of the coil module is in contact with the bottom of the storage groove. The groove wall and the outer surface of the coil module form an annular groove. The coil lead wire extends out of the insulating shell from the opening of the annular groove. The annular groove is filled with insulating adhesive.

[0008] As an optional technical solution for the DC contactor, the DC contactor further includes a contactor body that penetrates the coil frame; the top of the upper insulating cover is provided with a clearance through hole, the edge of the clearance through hole extends downward to form an annular protrusion, and the annular protrusion is sandwiched between the contactor body and the coil frame.

[0009] As an optional technical solution for DC contactors, the lower insulating cover is coaxially arranged with the coil module.

[0010] As an optional technical solution for DC contactors, the thickness of the upper insulating cover is equal everywhere; and / or, the thickness of the lower insulating cover is equal everywhere.

[0011] As an optional technical solution for the DC contactor, the upper insulating cover is made of plastic; and / or, the lower insulating cover is made of plastic.

[0012] As an optional technical solution for the DC contactor, the lead-out terminal is placed in the annular groove, and one end of the coil lead-out wire is placed in the annular groove and electrically connected to the lead-out terminal.

[0013] As an optional technical solution for the DC contactor, the receiving groove is further provided with a yoke module. The yoke module includes a magnetic yoke and a magnetic cylinder. The magnetic yoke forms a yoke groove, the magnetic cylinder is fixed to the bottom of the yoke groove, and the coil frame is sleeved on the magnetic cylinder.

[0014] As an optional technical solution for the DC contactor, the coil lead wires are arranged in an inverted U-shape, and the other end of the coil lead wires extends downward and passes through the yoke module.

[0015] As an optional technical solution for DC contactors, the magnetic yoke is provided with a first cable hole that connects to the yoke slot, and the coil lead passes through the first cable hole.

[0016] As an optional technical solution for the DC contactor, the DC contactor further includes a lower housing, which is detachably connected to the upper housing. The lower housing and the groove wall of the receiving slot form a receiving cavity. The lower housing has a second cable hole through which the coil lead passes.

[0017] The beneficial effects of this utility model are:

[0018] This DC contactor effectively isolates the coil module and its coil leads from other conductors by using upper and lower insulating covers. The upper insulating cover covers the top surface and part of the outer surface of the coil module, while the lower insulating cover forms a receiving groove to house the coil module. The annular groove is filled with insulating adhesive, effectively isolating the coil module and its leads from other live parts. This increases the creepage distance and clearance between the coil module and other live parts, reducing the risk of insulation breakdown between high and low voltage components. From a physical structure perspective, this effectively improves the insulation performance between the high and low voltage levels of the contactor. Simultaneously, the coil leads extend from the opening of the annular groove into the insulating shell, allowing them to be arranged orderly under insulation protection, preventing short circuits caused by contact between the coil leads and other components. Furthermore, the insulating shell encloses the coil module, providing physical protection and reducing the impact of external factors (such as dust and moisture) on the coil module, thus helping to extend its service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the DC contactor provided in this embodiment of the utility model;

[0020] Figure 2 This is an exploded view of the DC contactor provided in this embodiment of the utility model;

[0021] Figure 3 This is a cross-sectional view of the DC contactor provided in an embodiment of this utility model;

[0022] Figure 4 This is a structural schematic diagram of the insulating shell, coil module, and yoke module provided in this embodiment of the utility model;

[0023] Figure 5 This is an exploded view of the insulating shell, coil module, and yoke module provided in the embodiment of this utility model.

[0024] In the picture:

[0025] Z, vertical direction;

[0026] 100. Upper outer casing;

[0027] 200. Lower outer casing;

[0028] 400. Contactor body; 410. Terminal block;

[0029] 500. Permanent magnet;

[0030] 600. Magnetic plate;

[0031] 700. Insulating housing; 710. Upper insulating cover; 711. Annular protrusion; 720. Lower insulating cover; 730. Insulating adhesive;

[0032] 800. Coil module; 810. Coil frame; 820. Coil body; 821. Lead-out terminal; 830. Coil lead wire;

[0033] 900, Yoke module; 910, Magnetic cylinder; 920, Magnetic yoke; 921, First cable hole. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1 to 5 As shown, this embodiment provides a DC contactor, including an upper housing 100. The upper housing 100 has a downward-opening receiving groove, in which a coil module 800 and an insulating housing 700 are disposed. The coil module 800 includes a coil frame 810, a coil body 820, and coil leads 830. The coil frame 810 is a tubular member extending in the vertical direction Z. The coil body 820 is wound around the outer wall of the coil frame 810. The coil body 820 has a plurality of leads 821. The number of coil leads 830 is the same as the number of leads 821, and each lead 821 is electrically connected to one coil lead 830. The insulating housing 700 includes an upper housing 800, a lower housing 800, and an insulating housing 700. The coil module 800 consists of an upper insulating cover 710, a lower insulating cover 720, and insulating adhesive 730. The upper insulating cover 710 is located at the top of the coil module 800, covering the top surface and part of the outer surface of the coil module 800. The lower insulating cover 720 is located at the bottom of the coil module 800, forming an upward-opening storage groove. The upper insulating cover 710 partially extends into the storage groove. The bottom surface of the coil module 800 is in contact with the bottom of the storage groove. The groove wall and the outer surface of the coil module 800 form an annular groove. The coil lead wire 830 extends out of the insulating housing 700 from the opening of the annular groove. The annular groove is filled with insulating adhesive 730.

[0039] This DC contactor effectively isolates the coil module 800 and its coil leads 830 from other conductors by using an upper insulating cover 710 and a lower insulating cover 720. The upper insulating cover 710 covers the top surface and part of the outer surface of the coil module 800, while the lower insulating cover 720 forms a receiving groove to accommodate the coil module 800. The annular groove is filled with insulating adhesive 730, effectively isolating the coil module 800 and its leads 821 from other live conductors. This increases the creepage distance and clearance between the coil module 800 and other live conductors, reducing the risk of insulation breakdown between high and low voltage components. From a physical structure perspective, this effectively improves the insulation performance between the high and low voltage components of the contactor. Simultaneously, the coil leads 830 extend from the opening of the annular groove into the insulating housing 700, allowing the coil leads 830 to be arranged in an orderly manner under insulation protection, preventing short circuits caused by contact between the coil leads 830 and other components. Furthermore, the insulating housing 700 encloses the coil module 800, providing physical protection for the coil module 800, reducing the impact of external factors (such as dust and moisture) on the coil module 800, and helping to extend the service life of the coil module 800.

[0040] In this embodiment, the DC contactor also includes a contactor body 400, which penetrates the coil frame 810; the top of the upper insulating cover 710 is provided with a clearance through hole, and the edge of the clearance through hole extends downward to form an annular protrusion 711, which is sandwiched between the contactor body 400 and the coil frame 810.

[0041] The annular protrusion 711 at the top of the upper insulating cover 710 is sandwiched between the contactor body 400 and the coil frame 810, providing an additional insulating barrier between the contactor body 400 and the coil frame 810. On the one hand, it increases the insulation distance between the contactor body 400 and the coil module 800, improving the insulation performance between the contactor body 400 and the coil module 800, and ensuring that the contactor body 400 can penetrate the coil frame 810 to achieve normal function. On the other hand, it plays a positioning and fixing role, ensuring the relative position stability of the contactor body 400 and the coil frame 810, improving the overall stability and reliability of the DC contactor, and thus achieving a balance between space utilization and insulation performance.

[0042] For example, the lower insulating cover 720 is coaxially arranged with the coil module 800.

[0043] The lower insulating cover 720 is coaxially positioned with the coil module 800, ensuring a uniform distance between them. This uniformly extends the creepage distance and clearance, resulting in more uniform insulation protection and preventing localized degradation of insulation performance due to positional deviations. This ensures the stability and consistency of the insulation effect. Furthermore, these improvements facilitate a more uniform distribution of the magnetic field generated by the coil, thereby enhancing the electromagnetic performance of the DC contactor.

[0044] In one embodiment of this invention, the thickness of the upper insulating cover 710 is equal everywhere; and the thickness of the lower insulating cover 720 is equal everywhere.

[0045] The upper insulating cover 710 and the lower insulating cover 720 have the same thickness throughout, which facilitates processing and forming during manufacturing, ensures the consistency of insulation performance in all parts, and facilitates quality control and testing. Moreover, the uniform thickness ensures that the insulation performance remains stable in all parts, preventing localized degradation of insulation performance due to thickness differences, reducing weak points in insulation caused by uneven thickness, and improving manufacturing convenience and performance stability.

[0046] In another embodiment of this invention, only the thickness of the upper insulating cover 710 is defined to be equal everywhere. In yet another embodiment of this invention, only the thickness of the lower insulating cover 720 is defined to be equal everywhere.

[0047] In one embodiment of this invention, the upper insulating cover 710 is made of plastic; and the lower insulating cover 720 is made of plastic.

[0048] Plastic is used as the material for both the upper insulating cover 710 and the lower insulating cover 720. Plastic has good insulation properties, which can meet the insulation requirements of DC contactors. At the same time, plastic is relatively inexpensive and lightweight, making it easy to produce and install, which helps to reduce the manufacturing cost and overall weight of DC contactors.

[0049] In another embodiment of this invention, only the upper insulating cover 710 is made of plastic. In yet another embodiment of this invention, only the lower insulating cover 720 is made of plastic.

[0050] In this embodiment, the lead-out end 821 is placed in the annular groove, and one end of the coil lead-out line 830 is placed in the annular groove and electrically connected to the lead-out end 821.

[0051] The lead-out terminal 821 is placed in the annular groove, and one end of the coil lead 830 is electrically connected to the lead-out terminal 821 in the annular groove. The insulating glue 730 filled in the annular groove is used to wrap and effectively insulate the connection between the lead-out terminal 821 and the coil lead 830, so as to avoid insulation breakdown between the lead-out terminal 821 and the connection, and further improve the insulation performance.

[0052] Furthermore, the receiving groove is also provided with a yoke module 900, which includes a magnetic yoke 920 and a magnetic cylinder 910. The magnetic yoke 920 forms a yoke groove, the magnetic cylinder 910 is fixed to the bottom of the yoke groove, and the coil frame 810 is sleeved on the magnetic cylinder 910.

[0053] The magnetic yoke 920 and magnetic cylinder 910 of the yoke module 900 are sleeved and matched with the coil frame 810. The magnetic cylinder 910 can guide the magnetic field generated by the coil, enhance the concentration and strength of the magnetic field, improve the electromagnetic conversion efficiency of the DC contactor, and at the same time provide a stable support structure for the coil module 800, making the structure of the entire DC contactor more compact.

[0054] The magnetic yoke 920 forms a yoke slot, optimizing the magnetic circuit of the DC contactor, improving its electromagnetic conversion efficiency, and enhancing its electromagnetic attraction. Simultaneously, the optimized magnetic circuit structure also helps reduce electromagnetic interference, ensuring the stable operation of the DC contactor.

[0055] Furthermore, the coil lead 830 is arranged in an inverted U-shape, with the other end of the coil lead 830 extending downward and passing through the yoke module 900.

[0056] The coil lead 830 is arranged in an inverted U-shape and passes through the yoke module 900. This wiring method makes reasonable use of space, makes the wiring of the coil lead 830 more orderly, and avoids the coil lead 830 crossing and interfering with other components. At the same time, the yoke module 900 can provide a certain degree of protection for the coil lead 830, reduce external interference, and further extend the distance between the coil lead 830 and other live parts, thus enhancing the insulation effect.

[0057] Furthermore, the magnetic yoke 920 is provided with a first cable hole 921 that connects to the yoke slot, and the coil lead wire 830 passes through the first cable hole 921.

[0058] The magnetic yoke 920 is provided with a first cable hole 921, which allows the coil lead wire 830 to pass through in an orderly manner, ensuring that the coil lead wire 830 can accurately pass through the yoke module 900. This facilitates the installation and fixation of the coil lead wire 830 and makes the wiring more standardized. At the same time, it avoids friction and collision between the coil lead wire 830 and the magnetic yoke 920, protects the insulation layer of the coil lead wire 830, and improves the reliability of the equipment.

[0059] In this embodiment, the DC contactor also includes a lower housing 200, which is detachably connected to the upper housing 100. The lower housing 200 and the groove wall of the receiving groove form a receiving cavity. The lower housing 200 has a second cable hole through which the coil lead wire 830 passes.

[0060] The lower housing 200 and the upper housing 100 form a cavity that protects the internal components, preventing external dust, moisture, and other factors from affecting their insulation performance. The lower housing 200 is detachably connected to the upper housing 100, facilitating the installation, maintenance, and replacement of the internal components of the DC contactor. The second cable hole on the lower housing 200 provides a passage for the coil lead 830, enabling overall wiring management. This allows the DC contactor to be easily connected to external circuits while remaining encapsulated, while also enhancing the overall protection performance of the DC contactor and making the overall structure more compact and rational.

[0061] In this embodiment, two magnetic conductive modules are also provided in the receiving groove. The top surface of the contactor body 400 is provided with two terminals 410, and the terminals 410 extend out of the receiving groove. The magnetic conductive module is located in the second groove. The magnetic conductive module includes 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 surrounds a terminal 410 from three directions.

[0062] The specific structure and working principle of the contactor body 400 and the magnetic module are common knowledge in the field and are well known to those skilled in the art. They are not the focus of this embodiment and will not be elaborated here.

[0063] 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, Includes an upper housing (100), the upper housing (100) having a downward-opening receiving groove, the receiving groove being provided with: A coil module (800) includes a coil frame (810), a coil body (820), and coil leads (830). The coil frame (810) is a tubular component extending in a vertical direction (Z). The coil body (820) is wound around the outer wall of the coil frame (810). The coil body (820) has a plurality of leads (821). The number of coil leads (830) is the same as the number of leads (821). Each lead (821) is electrically connected to one coil lead (830). An insulating housing (700) includes an upper insulating cover (710), a lower insulating cover (720), and insulating adhesive (730). The upper insulating cover (710) is located at the top of the coil module (800) and covers the top surface of the coil module (800) and part of the outer surface of the coil module (800). The lower insulating cover (720) is located at the bottom of the coil module (800) and forms an upward-opening storage groove. The upper insulating cover (710) partially extends into the storage groove. The bottom surface of the coil module (800) is in contact with the bottom of the storage groove. The groove wall and the outer surface of the coil module (800) form an annular groove. The coil lead wire (830) extends out of the insulating housing (700) from the opening of the annular groove. The annular groove is filled with the insulating adhesive (730).

2. The DC contactor of claim 1, wherein The DC contactor also includes a contactor body (400) that penetrates the coil frame (810); the top of the upper insulating cover (710) is provided with a clearance through hole, the edge of the clearance through hole extends downward to form an annular protrusion (711), and the annular protrusion (711) is sandwiched between the contactor body (400) and the coil frame (810).

3. The DC contactor of claim 1, wherein, The lower insulating cover (720) is coaxially arranged with the coil module (800).

4. The DC contactor of claim 1, wherein, The thickness of the upper insulating cover (710) is equal everywhere; and / or, The thickness of the lower insulating cover (720) is equal everywhere.

5. The DC contactor of claim 1, wherein, The upper insulating cover (710) is made of plastic; and / or, The lower insulating cover (720) is made of plastic.

6. The DC contactor of claim 1, wherein, The lead-out end (821) is placed in the annular groove, and one end of the coil lead-out line (830) is placed in the annular groove and electrically connected to the lead-out end (821).

7. The DC contactor according to claim 6, characterized in that, The accommodating groove is also provided with a yoke module (900), the yoke module (900) includes a magnetic yoke (920) and a magnetic cylinder (910), the magnetic yoke (920) forms a yoke groove, the magnetic cylinder (910) is fixed to the bottom of the yoke groove, and the coil frame (810) is sleeved on the magnetic cylinder (910).

8. The DC contactor according to claim 7, characterized in that, The coil lead (830) is arranged in an inverted U-shape, and the other end of the coil lead (830) extends downward and passes through the yoke module (900).

9. The DC contactor according to claim 8, characterized in that, The magnetic yoke (920) is provided with a first cable hole (921) that connects to the yoke groove, and the coil lead (830) passes through the first cable hole (921).

10. The DC contactor according to any one of claims 1-9, characterized in that, The DC contactor also includes a lower housing (200), which is detachably connected to the upper housing (100). The lower housing (200) and the groove wall of the receiving groove form a receiving cavity. The lower housing (200) has a second cable hole through which the coil lead (830) passes.

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