Direct current contactor

Abstract

The utility model discloses a kind of DC contactors, it is related to electrical switch technical field.In it, DC contactor is equipped with isolation cavity by being away from the one end of contactor body contact in shell, thereby increased the electrical clearance between contactor body and shell bottom, by can significantly reduce the risk of high-voltage side arc discharge and breakdown, effectively improve the insulation performance of DC contactor, reduce the probability of high-voltage side voltage diffusion situation occurs through DC contactor to peripheral electrical components;While being equipped with protruding structure in isolation cavity, in the height direction of DC contactor, the both ends of protruding structure are respectively connected on the two side walls of isolation cavity upper and lower interval arrangement, thereby by the setting of protruding structure in the two side wall surfaces of isolation cavity along the height direction of DC contactor respectively form a tortuous path, thereby can increase creeping distance, so that the insulation performance of DC contactor can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, and in particular to a DC contactor. Background Technology

[0002] Currently, most contactors are installed on the high-voltage side of energy storage and charging equipment. However, contactors cannot meet the insulation requirements from the low-voltage end to the high-voltage end of the system. In extreme cases, there is a risk that the low-voltage coil and auxiliary contacts may be broken down by the high-voltage equipment system. After the contactor is broken down by the high-voltage equipment, the breakdown voltage will spread through the contactor's housing to the adjacent electrical components, thereby causing a greater safety accident. Utility Model Content

[0003] The main purpose of this invention is to propose a DC contactor that aims to improve the current DC contactor's susceptibility to breakdown by high-voltage equipment, which can lead to the breakdown voltage spreading to surrounding electrical components and causing significant safety accidents.

[0004] To achieve the above objectives, this utility model proposes a DC contactor, wherein the DC contactor has intersecting X, Y, and Z directions, and includes:

[0005] Contactor body;

[0006] A housing, wherein the contactor body is housed within the housing; in the Z direction, the housing has an isolation cavity at the contact end away from the contactor body, the isolation cavity having a first mounting surface on the side away from the contactor body and a second mounting surface on the side closer to the contactor body; and

[0007] A protruding structure is disposed within the isolation cavity, and the protruding structure extends along the Z direction; in the Z direction, the two sides of the protruding structure are respectively connected to the first mounting surface and the second mounting surface.

[0008] In one embodiment, the DC contactor further includes a PCB board;

[0009] The PCB board is housed within the isolation cavity and is electrically connected to the contactor body for controlling the action of the contactor body.

[0010] In the Z direction, the PCB board has a through groove at the position corresponding to the protrusion structure.

[0011] In one embodiment, the protrusion structure includes:

[0012] Raised ribs are formed on one of the first mounting surface and the second mounting surface; and

[0013] A groove structure is provided corresponding to the protruding rib, so that the protruding rib is inserted into the groove structure; the groove structure is formed on the other of the first mounting surface and the second mounting surface.

[0014] In one embodiment, the groove structure includes:

[0015] A protrusion, formed on the second mounting surface, extends in the Z direction in a direction away from the contactor body; and

[0016] An insertion groove is provided inside the protrusion. In the Z direction, the insertion groove passes through one end of the protrusion away from the contactor body, and is used to insert the protruding rib.

[0017] And / or the protrusion is spaced apart from the sidewall of the isolation cavity extending along the Z direction, so as to form the insertion groove between the protrusion and the sidewall of the isolation cavity extending along the Z direction.

[0018] In one embodiment, in the X direction, the protrusion includes two spaced-apart first sub-parts and second sub-parts, both of which extend along the Y direction;

[0019] The first sub-part and the second sub-part are both connected to one side wall of the isolation cavity extending along the Z direction along the Y direction on one side. A first sub-groove is formed in the first sub-part and a second sub-groove is formed in the second sub-part. A third sub-groove is formed on one side wall of the isolation cavity extending along the Z direction between the first sub-part and the second sub-part.

[0020] The third sub-slot is connected to the first sub-slot and the second sub-slot at both ends along the X direction, respectively, to form the insertion slot.

[0021] In one embodiment, the raised rib includes:

[0022] The first protruding rib corresponds to the first sub-groove; and

[0023] The second protruding rib corresponds to the second sub-groove;

[0024] The third rib corresponds to the third sub-groove, and the two ends of the third rib along the X direction are respectively connected to the first rib and the second rib.

[0025] In one embodiment, the PCB board is electrically connected to the contactor body via an adapter plate;

[0026] An installation space is formed between the first sub-part and the second sub-part, and the electrical connection between the adapter piece and the PCB board is located within the installation space.

[0027] In one embodiment, the DC contactor further includes:

[0028] The first rib is connected to the second mounting surface; and

[0029] The second rib is connected to the first mounting surface; in the Z direction, the projection of the PCB board is denoted as S1, the projection of the first rib is denoted as S2, and the projection of the second rib is denoted as S3, and S2 and S3 are both located outside of S1.

[0030] In one embodiment, the housing includes:

[0031] A housing for accommodating the contactor body; in the Z direction, the end of the housing away from the contactor body contacts has a groove, and the side of the groove opposite to the contactor body has an opening communicating with the outside; and

[0032] A bottom cover is disposed over the opening, the bottom cover being used to seal the groove so that the groove forms the isolation cavity;

[0033] In the Z direction, the first mounting surface is formed on the side of the bottom cover facing the groove, and the second mounting surface is formed on the side of the groove opposite to the bottom cover.

[0034] In one embodiment, the bottom cover is detachably connected to the outer casing.

[0035] This utility model of a DC contactor features an isolation cavity at the end of the housing furthest from the contactor body contacts. This increases the electrical clearance between the contactor body and the bottom of the housing, significantly reducing the risk of arcing and breakdown on the high-voltage side and effectively improving the insulation performance of the DC contactor. Simultaneously, a raised structure is provided within the isolation cavity. Along the height direction of the DC contactor, the two ends of the raised structure are connected to the two side walls of the isolation cavity, spaced apart vertically. This creates a tortuous path on each of the two side wall surfaces along the height direction of the DC contactor, increasing the creepage distance and further improving the insulation performance of the DC contactor. This reduces the probability of high voltage on the high-voltage side of the equipment spreading to surrounding electrical components via the DC contactor, thus preventing the expansion of the accident area. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the overall structure of the DC contactor of this utility model;

[0038] Figure 2 This is a schematic diagram of the DC contactor of this utility model after removing the bottom cover;

[0039] Figure 3 This utility model's DC contactor is Figure 1 Another structural diagram from a different perspective;

[0040] Figure 4 This utility model's DC contactor is Figure 2 A structural diagram after removing the PCB board;

[0041] Figure 5 This utility model relates to a DC contactor. Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0042] Figure 6 This utility model relates to a DC contactor. Figure 4 Enlarged schematic diagram of the structure at point B;

[0043] Figure 7 This is a schematic diagram of the bottom cover structure of the DC contactor of this utility model;

[0044] Figure 8 This utility model relates to a DC contactor. Figure 6 Another perspective view of the midsole cover structure;

[0045] Figure 9 This is a schematic diagram of the DC contactor of this utility model after removing part of the outer casing.

[0046] Explanation of icon numbers:

[0047] 1. Contactor body;

[0048] 2. Housing; 21. Outer shell; 211. Groove; 2111. Second mounting surface; 212. Opening; 213. First rib; 214. Snap-fit ​​hole; 22. Bottom cover; 221. First mounting surface; 222. Second rib; 223. Extension; 2231. Snap-fit ​​protrusion; 224. Side rib; 2241. First side rib; 2242. Second side rib; 2243. Third side rib; 2244. Fourth side rib;

[0049] 3. Protruding structure; 31. Protruding rib; 311. First protruding rib; 312. Second protruding rib; 313. Third protruding rib; 32. Groove structure; 321. Protrusion; 3211. First sub-part; 3212. Second sub-part; 322. Insertion groove; 3221. First sub-groove; 3222. Second sub-groove; 3223. Third sub-groove;

[0050] 4. PCB board; 41. Groove cutting;

[0051] 5. Adapter plate.

[0052] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0054] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0055] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments 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 impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0056] Currently, most contactors are installed on the high-voltage side of energy storage and charging equipment. However, contactors cannot meet the insulation requirements from the low-voltage end to the high-voltage end of the system. In extreme cases, there is a risk that the low-voltage coil and auxiliary contacts may be broken down by the high-voltage equipment system. After the contactor is broken down by the high-voltage equipment, the breakdown voltage will spread through the contactor's housing to the adjacent electrical components, thereby causing a greater safety accident.

[0057] Based on this, refer to Figures 1-9As shown, this application embodiment provides a DC contactor with intersecting X, Y, and Z directions, including a contactor body 1, a housing 2, and a protruding structure 3. The contactor body 1 has contacts extending outward from the housing 2. The main function of the contacts is to control the on / off state of the high-voltage side circuit, thereby allowing the contacts to directly contact the high-voltage side and enabling the contactor body 1 to have a higher voltage. The housing 2 is used to house the contactor body 1. An isolation cavity is provided in the housing 2 on the side away from the contactor body 1. The protruding structure 3 is provided in the isolation cavity and extends along the Z direction, which is the direction of the height of the DC contactor. In the Z direction, the side of the isolation cavity away from the contactor body 1 has a first mounting surface 221, and the side closer to the contactor body 1 has a second mounting surface 2111. The two sides of the protruding structure 3 along the Z direction are respectively in contact with the first mounting surface 221 and the second mounting surface 2111.

[0058] In this embodiment, an isolation cavity is provided between the bottom of the contactor body 1 and the housing 2, thereby increasing the distance between the bottom of the housing 2 and the contactor body 1, and increasing the electrical clearance between them. Because the contacts on the contactor body 1 are in direct contact with the high-voltage side circuit, the contactor body 1 becomes a high-voltage component. When the DC contactor is in use, the contacts of the contactor body 1 belong to the high-voltage side. By providing the aforementioned isolation cavity between the bottom of the contactor body 1 and the housing 2, the electrical clearance between the contacts on the contactor body 1 and the bottom of the housing 2 can be significantly increased. This can effectively reduce the risk of arc discharge and breakdown on the high-voltage side, improve the insulation performance of the DC contactor, and reduce the probability of high voltage breakdown on the high-voltage side spreading to surrounding electrical equipment, thereby improving the safety and reliability of the equipment.

[0059] In this embodiment, a protruding structure 3 is provided within the aforementioned isolation cavity. The two sides of the protruding structure 3 along the Z-direction are respectively in contact with the first mounting surface 221 and the second mounting surface 2111. This creates relatively tortuous paths on the surfaces of the first mounting surface 221 and the second mounting surface 2111, thereby increasing the creepage distance and further improving the insulation performance of the DC contactor. This design ensures that the breakdown voltage or current needs to travel a longer path on the surfaces of the first mounting surface 221 and the second mounting surface 2111. Due to the longer path, the current needs to overcome more obstacles during the breakdown process. The increased resistance reduces the likelihood of the DC contactor being damaged. Understandably, the raised structure 3 can be designed in different shapes, such as stepped or sawtooth, to further increase the surface creepage distance of the first mounting surface 221 and the second mounting surface 2111. It should be noted that the housing 2 and the raised structure 3 in this solution should be made of insulating materials to ensure their insulation performance. An exemplary insulating material can be PBT (polybutylene terephthalate), which has high tensile strength and flexural modulus, can withstand large mechanical loads, and has good electrical insulation performance.

[0060] Reference Figure 2 As shown, in one embodiment of this application, the DC contactor further includes a PCB board 4; the PCB board 4 is installed in the isolation cavity and is electrically connected to the contactor body 1 to control the action of the contactor body 1; in order to avoid the protruding structure 3, a slot 41 is provided through the PCB board 4 at the corresponding position of the protruding structure 3 in the Z direction, thereby enabling the PCB board 4 to be installed in the isolation cavity.

[0061] In this embodiment, PCB board 4 is a control element and a low-voltage side device. Through the circuit design on PCB board 4, the power supply and power-off control of the electromagnetic coil are realized, thereby controlling the closing and opening of the contacts of contactor body 1, thus realizing the control of the high-voltage side circuit. By placing PCB board 4 in the isolation cavity, that is, in a position away from the high-voltage contacts, the high-voltage contacts and the low-voltage side device can be effectively isolated, preventing the high voltage on the high-voltage side from damaging the control circuit (PCB board 4) on the low-voltage side.

[0062] In this embodiment, since the PCB board 4 is provided with a groove 41 at the position corresponding to the protrusion structure 3, the creepage distance between the circuit components and related electrical components on the PCB board 4 is also increased. Because the circuits and electrical components on the PCB board 4 located on both sides of the protrusion structure 3 are effectively isolated by the protrusion structure 3, the path between the circuits or electrical components located on both sides of the protrusion structure 3 is more tortuous, thereby increasing the creepage distance.

[0063] Reference Figure 4 , Figure 5As shown, in one embodiment of this application, the protruding structure 3 includes a protruding rib 31 and a groove structure 32. The protruding rib 31 is formed on one of the first mounting surface 221 and the second mounting surface 2111. The groove structure 32 is correspondingly provided with the protruding rib 31, so that the protruding rib 31 can be inserted into the groove structure 32 and form the protruding structure 3 in the isolation cavity. The groove structure 32 is formed on the other of the first mounting surface 221 and the second mounting surface 2111. It can be understood that the protruding rib 31 can be formed on the first mounting surface 221 or the second mounting surface 2111. When the protruding rib 31 is formed on the first mounting surface 221, the groove structure 32 is formed on the second mounting surface 2111. When the protruding rib 31 is formed on the second mounting surface 2111, the groove structure 32 is formed on the first mounting surface 221. As long as the protruding rib 31 and the groove structure 32 can be inserted together to form an interactive structure, it is acceptable.

[0064] It is understandable that when the protruding rib 31 is inserted into the groove structure 32, a protruding structure 3 is formed in the isolation cavity to increase the creepage distance of the first mounting surface 221 and the second mounting surface 2111, thereby improving the insulation performance of the DC contactor and reducing the probability that the DC contactor will be broken down by the high voltage on the high voltage side and spread to the surrounding electrical components.

[0065] Reference Figure 4 , Figure 5 , Figure 6 As shown, in one embodiment of this application, the groove structure 32 includes a protrusion 321 and an insertion groove 322; this embodiment is described and illustrated using the example of the groove structure 32 being disposed on the second mounting surface 2111; as shown Figure 5 As shown, the protrusion 321 is formed on the second mounting surface 2111 (while the raised rib 31 is formed on the first mounting surface 221), and in the Z direction, the protrusion 321 extends away from the contactor body 1 on the side. The insertion groove 322 is provided in the protrusion 321, and in the Z direction, the insertion groove 322 penetrates the side wall of the protrusion 321 away from the contactor body 1, that is, the side of the protrusion 321 facing the first mounting surface 221 is penetrated by the insertion groove 322, thereby allowing the raised rib 31 to be inserted into the insertion groove 322 and cooperate with the protrusion 321 to form the above-mentioned protrusion structure 3, thereby increasing the creepage distance on the surfaces of the first mounting surface 221 and the second mounting surface 2111, and thus improving the insulation performance of the DC contactor.

[0066] In this embodiment, as Figure 6As shown, the protrusion 321 can also be spaced apart from the side wall of the isolation cavity extending in the Z direction, so that the insertion groove 322 is formed between the protrusion 321 and the side wall of the isolation cavity extending in the Z direction. This allows the protruding rib 31 provided on the first mounting surface 221 to be inserted into the insertion groove 322 between the protrusion 321 and the side wall of the isolation cavity extending in the Z direction, forming the protruding structure 3. This significantly increases the surface creepage distance between the first mounting surface 221 and the second mounting surface 2111, thereby improving the insulation performance of the DC contactor.

[0067] It is understood that the groove structure 32 inside the isolation cavity may be composed of a protrusion 321 formed on the second mounting surface 2111 and an insertion groove 322 provided in the protrusion 321 and such that the protrusion 321 faces the first mounting surface 221. Alternatively, the insertion groove 322 may be formed between the protrusion 321 and the side wall of the isolation cavity extending in the Z direction, thereby forming the groove structure 32. Or, both of the above structural forms may be included at the same time. As long as the protruding rib 31 provided on the first mounting surface 221 can be matched and correspondingly provided with the groove structure 32 formed on the second mounting surface 2111, and the protruding rib 31 can be inserted into the insertion groove 322, it is acceptable.

[0068] Reference Figure 5 , Figure 6 As shown, in one embodiment of this application, in the X direction, the protrusion 321 includes two spaced-apart first sub-parts 3211 and second sub-parts 3212. Both the first sub-parts 3211 and the second sub-parts 3212 extend in the Y direction. One side of the first sub-parts 3211 and the second sub-parts 3212 in the Y direction is connected to one side wall of the isolation cavity in the Z direction. A first sub-groove 3221 is formed in the first sub-part 3211, and a second sub-groove 3222 is formed in the second sub-part 3212. A third sub-groove 3223 is formed on the side wall of the isolation cavity between the first sub-part 3211 and the second sub-part 3212 extending in the Z direction. The two ends of the third sub-groove 3223 in the X direction are respectively connected to the first sub-groove 3221 and the second sub-groove 3222. Thus, the first sub-groove 3221, the second sub-groove 3222 and the third sub-groove 3223 constitute an insertion groove 322 for inserting the protruding rib 31 provided on the first mounting surface 221 to form a protruding structure 3.

[0069] In this embodiment, as Figure 6As shown, the protrusion 321 can also be other structural forms, such as a flat plate structure, an L-shaped structure, or a structure that includes both a flat plate structure and an L-shaped structure; and the aforementioned flat plate structure and L-shaped structure are respectively arranged at intervals between the isolation cavity and the sidewall extending along the Z direction, thereby forming an insertion groove 322 between them for inserting the protruding rib 31 provided on the first mounting surface 221 to form the protruding structure 3. It is understood that the insertion groove 322 in this solution can be of any shape, such as Figure 5 The insertion slot 322 shown has a U-shaped structure, as... Figure 6 The insertion slot 322 shown is L-shaped. Of course, the insertion slot 322 can also be other shapes, as long as the protruding rib 31 provided on the first mounting surface 221 can be matched and correspondingly set, and the protruding rib 31 can be inserted into the insertion slot 322 to form a protruding structure 3.

[0070] Reference Figure 7 , Figure 8 As shown, in one embodiment of this application, the raised rib 31 includes a first raised rib 311, a second raised rib 312, and a third raised rib 313; wherein, the first raised rib 311 is correspondingly disposed with the first sub-groove 3221 and inserted into the first sub-groove 3221, the second raised rib 312 is correspondingly disposed with the second sub-groove 3222 and inserted into the second sub-groove 3222, and the third raised rib 313 is correspondingly disposed with the third sub-groove 3223 and inserted into the third sub-groove 3223; and the two ends of the third raised rib 313 along the X direction are respectively connected to the first raised rib 311 and the second raised rib 312.

[0071] In this embodiment, the raised rib can also be a side rib 224 formed on the first mounting surface 221, such as... Figure 7 As shown, the side reinforcement 224 includes a first side reinforcement 2241 and a second side reinforcement 2242, and the first side reinforcement 2241 and the second side reinforcement 2242 are connected, thereby forming an L-shaped structure with the connected first side reinforcement 2241 and the second side reinforcement 2242; as Figure 6 As shown, a rectangular insertion groove 322 is formed between one of the flat protrusions 321 and one side wall of the isolation cavity along the Z direction. A groove space communicating with the rectangular insertion groove 322 is formed inward on the first mounting surface 221 in a direction away from the second mounting surface 2111. Thus, it cooperates with the rectangular insertion groove 322 to form an L-shaped insertion groove 322 on the first mounting surface 221. The first side rib 2241 is inserted into the L-shaped insertion groove 322, and the second side rib 2242 is inserted into the groove space. Thus, a protrusion structure 3 is formed on the first mounting surface 221.

[0072] In this embodiment, as Figure 7As shown, the side reinforcement 224 may also include a third side reinforcement 2243 and a fourth side reinforcement 2244, and the third side reinforcement 2243 and the fourth side reinforcement 2244 are connected, thereby forming an L-shaped structure; as shown Figure 6 As shown, the third side rib 2243 and the fourth side rib 2244 are respectively inserted into the insertion groove 322 between the L-shaped protrusion 321 and the side wall of the isolation cavity extending along the Z direction, thereby forming a protruding structure 3 on the first mounting surface 221. It can be understood that the form of the side rib 224 can be only one of the two forms mentioned above, or it can include both forms. In actual production, the corresponding structural form can be set according to different user needs, as long as a protruding structure can be formed on the surface of the first mounting surface 221 and the second mounting surface 2111, thereby increasing the creepage distance on the surface of the first mounting surface 221 and the second mounting surface 2111.

[0073] Reference Figure 2 As shown, in one embodiment of this application, the PCB board 4 is electrically connected to the contactor body 1 via an adapter piece 5; wherein, the adapter piece 5 includes a first adapter piece for electrically connecting the PCB board 4 to the contactor body 1, and also includes a second adapter piece for connecting the PCB board 4 to an external control circuit; as shown Figure 2 As shown, an installation space is formed between the first sub-part 3211 and the second sub-part 3212, such that the connection part between the first adapter piece and the PCB board 4 is located in the installation space. As a result, the first adapter piece is surrounded by the U-shaped protrusion structure 3, which significantly increases the creepage distance between the connection point of the PCB board 4 and the first adapter piece and the outer wall of the housing 2, and further improves the insulation performance of the DC contactor.

[0074] In this embodiment, the second adapter piece is disposed inside the protruding structure 3 composed of the first side rib 2241, the second side rib 2242, the third side rib 2243, the fourth side rib 2244 and the corresponding insertion groove 322. This allows the second adapter to be enclosed inside the protruding structure 3, thereby significantly increasing the creepage distance between the connection between the second adapter piece and the PCB board 4 and the outer wall of the housing 2, and further improving the insulation performance of the DC contactor.

[0075] Reference Figure 4 , Figure 7 , Figure 8As shown, in one embodiment of this application, the DC contactor further includes a first rib 213 and a second rib 222; wherein, the first rib 213 is connected to the second mounting surface 2111, and the second rib 222 is connected to the first mounting surface 221. In the Z direction, the projection of the PCB board 4 is denoted as S1, the projection of the first rib 213 is denoted as S2, and the projection of the second rib 222 is denoted as S3. S2 and S3 are both located outside of S1, thereby forming the aforementioned first rib 213 and second rib 222 between the outer wall of the housing 2 and the edge of the PCB board 4, thereby increasing the creepage distance between the edge of the PCB board 4 and the outer wall of the housing 2, and further improving the insulation performance of the DC contactor.

[0076] It is understandable that the first rib 213 and the second rib 222 can be of any shape, as long as the projections of the first rib 213 and the second rib 222 are located on the outer side of the PCB board 4 in the Z direction; the first rib 213 and the second rib 222 should also be insulating materials, such as PBT (polybutylene terephthalate), which have high tensile strength and flexural modulus, can withstand large mechanical loads, and have good electrical insulation properties; it is understandable that the above-mentioned protruding structure 3 formed on the first mounting surface 221 and the second mounting surface 2111 increases the creepage distance and also plays a similar role to a reinforcing rib, thereby improving the strength of the shell 2 structure.

[0077] Reference Figure 1 , Figure 2 , Figure 3 As shown, in one embodiment of this application, the housing 2 includes an outer shell 21 and a bottom cover 22; wherein, the outer shell 21 is used to accommodate the contactor body 1; in the Z direction, the end of the outer shell 21 away from the contactor body 1 has a groove 211, and the side of the groove 211 away from the contactor body 1 has an opening 212 communicating with the outside; the bottom cover 22 is disposed on the opening 212 to seal the groove 211 so that the groove 211 forms the aforementioned isolation cavity; in the Z direction, a first mounting surface 221 is formed on the side of the bottom cover 22 facing the groove 211, and a second mounting surface 2111 is formed on the side of the groove 211 opposite to the bottom cover 22.

[0078] Reference Figure 1 , Figure 3 , Figure 4 , Figure 7 As shown, in one embodiment of this application, the bottom cover 22 and the outer shell 21 are detachably connected. Exemplarily, the bottom cover 22 and the outer shell 21 can be connected by a snap-fit ​​connection, or by other forms of connection, as long as the bottom cover 22 can be detachably installed on the outer shell 21. Exemplarily, this embodiment provides a connection method between the bottom cover 22 and the outer shell 21, such as... Figure 7 , Figure 8As shown, the bottom cover 22 has an extension 223 extending in the Z direction on the side facing the outer shell 21, and a snap-fit ​​protrusion 2231 protrudes from the outer side of the extension 223, and the snap-fit ​​protrusion 2231 is set as an inclined surface on the side facing the outer shell 21; as Figure 4 As shown, a snap-fit ​​hole 214 is provided on the side wall of the groove 211 extending in the Z direction, which mates with the snap-fit ​​protrusion 2231. The snap-fit ​​hole 214 is provided through the groove 211 in the thickness direction of the side wall extending in the Z direction. Thus, when the bottom cover 22 is placed over the opening, the inclined surface of the snap-fit ​​protrusion 2231 protruding on the outside of the extension 223 abuts against the side wall of the groove 211 extending in the Z direction. As the bottom cover 22 continues to move, the extension 223 is forced to deform towards the isolation cavity. When the snap-fit ​​protrusion 2231 moves to the position corresponding to the snap-fit ​​hole 214, the snap-fit ​​protrusion 2231 is no longer blocked by the side wall of the groove 211 extending in the Z direction, and thus snaps into the snap-fit ​​hole 214, realizing the snap-fit ​​connection between the bottom cover 22 and the outer shell 21.

[0079] It is understood that multiple matching snap-fit ​​protrusions 2231 and snap-fit ​​holes 214 can be provided around the periphery of the housing 2, thereby achieving a stable connection between the bottom cover 22 and the outer shell 21.

[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A direct current contactor having X, Y and Z directions which intersect two by two, characterized in that, include: Contactor body; Housing, wherein the contactor body is housed within the housing; In the Z direction, the housing has an isolation cavity at the contact end away from the contactor body. The isolation cavity has a first mounting surface on the side away from the contactor body and a second mounting surface on the side close to the contactor body. as well as A protruding structure is disposed within the isolation cavity, and the protruding structure extends along the Z direction; in the Z direction, the two sides of the protruding structure are respectively connected to the first mounting surface and the second mounting surface.

2. The DC contactor of claim 1, wherein The DC contactor also includes a PCB board; The PCB board is housed within the isolation cavity and is electrically connected to the contactor body for controlling the action of the contactor body. In the Z direction, the PCB board has a through groove at the position corresponding to the protrusion structure.

3. The DC contactor of claim 2, wherein, The protrusion structure includes: Raised ribs are formed on one of the first mounting surface and the second mounting surface; and A groove structure is provided corresponding to the protruding rib, so that the protruding rib is inserted into the groove structure; the groove structure is formed on the other of the first mounting surface and the second mounting surface.

4. The DC contactor of claim 3, wherein The groove structure includes: A protrusion, formed on the second mounting surface, extends in the Z direction in a direction away from the contactor body; and An insertion groove is provided inside the protrusion. In the Z direction, the insertion groove passes through one end of the protrusion away from the contactor body, and is used to insert the protruding rib. And / or the protrusion is spaced apart from the sidewall of the isolation cavity extending along the Z direction, so as to form the insertion groove between the protrusion and the sidewall of the isolation cavity extending along the Z direction.

5. The DC contactor of claim 4, wherein, In the X direction, the protrusion includes two spaced-apart first sub-parts and second sub-parts, both of which extend along the Y direction; The first sub-part and the second sub-part are both connected to one side wall of the isolation cavity extending along the Z direction along the Y direction on one side. A first sub-groove is formed in the first sub-part and a second sub-groove is formed in the second sub-part. A third sub-groove is formed on one side wall of the isolation cavity extending along the Z direction between the first sub-part and the second sub-part. The third sub-slot is connected to the first sub-slot and the second sub-slot at both ends along the X direction, respectively, to form the insertion slot.

6. The DC contactor of claim 5, wherein, The protruding ribs include: The first protruding rib corresponds to the first sub-groove; and The second protruding rib corresponds to the second sub-groove; The third rib corresponds to the third sub-groove, and the two ends of the third rib along the X direction are respectively connected to the first rib and the second rib.

7. The DC contactor of claim 5, wherein the DC contactor is configured to be connected to a DC power source. The PCB board is electrically connected to the contactor body via an adapter plate; An installation space is formed between the first sub-part and the second sub-part, and the electrical connection between the adapter piece and the PCB board is located within the installation space.

8. A DC contactor according to any one of claims 2 to 7, characterised in that, The DC contactor also includes: The first rib is connected to the second mounting surface; and The second rib is connected to the first mounting surface; in the Z direction, the projection of the PCB board is denoted as S1, the projection of the first rib is denoted as S2, and the projection of the second rib is denoted as S3, and S2 and S3 are both located outside of S1.

9. The DC contactor as described in any one of claims 2-7, characterized in that, The housing includes: A housing for accommodating the contactor body; in the Z direction, the end of the housing away from the contactor body contacts has a groove, and the side of the groove opposite to the contactor body has an opening communicating with the outside; and A bottom cover is disposed over the opening, the bottom cover being used to seal the groove so that the groove forms the isolation cavity; In the Z direction, the first mounting surface is formed on the side of the bottom cover facing the groove, and the second mounting surface is formed on the side of the groove opposite to the bottom cover.

10. The DC contactor of claim 9, wherein, The bottom cover and the outer shell are detachably connected.

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