A high-voltage DC relay

Abstract

This application discloses a high-voltage DC relay, relating to the field of relay technology. The high-voltage DC relay includes: a main stationary contact; an insulating cover with a receiving structure for mounting the main stationary contact, the main stationary contact having a lead-out end extending outside the insulating cover; an insulating layer covering the upper surface of the insulating cover, the insulating layer having a first mounting hole corresponding to the receiving structure, the first mounting hole forming an annular gap with the lead-out end; and a housing including a top wall structure located above the insulating layer, the top wall structure having a second mounting hole, the outer circumference of the second mounting hole having an annular retaining edge extending into the first mounting hole, the annular retaining edge forming an annular groove with the lead-out end. This application allows the adhesive to be concentrated and distributed on the outer periphery of the lead-out end of the stationary contact, ensuring insulation effect, and also simplifies the dispensing process and reduces the total amount of adhesive dispensed.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a high-voltage DC relay. Background Technology

[0002] With the continuous improvement of market demand, the contactor industry is constantly innovating and upgrading its products. However, existing high-voltage relay products on the market still have many shortcomings and need further development and improvement. High-voltage relay products generally include main contact mechanisms and auxiliary contact mechanisms. The main contact mechanism includes active contacts and main stationary contacts, while the auxiliary contact mechanism includes auxiliary moving contacts and auxiliary stationary contacts.

[0003] Currently, relays require adhesive to be applied after the stationary contact is installed. After application, the adhesive is squeezed by the injection molding part or top cover above the ceramic cover, so that the adhesive is spread evenly on the upper side of the ceramic cover to achieve sealing and insulation of the stationary contact. This type of adhesive application is relatively complex, and the even spreading method can easily lead to the adhesive not being concentrated on the outer periphery of the lead-out end of the stationary contact, resulting in poor insulation effect.

[0004] Therefore, in view of the above-mentioned defects, how to provide a high-voltage DC relay with good insulation effect and simplified process is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a high-voltage DC relay that allows the adhesive to be concentrated on the outer periphery of the lead-out end of the stationary contact, ensuring insulation performance, and also simplifies the dispensing process and reduces the total amount of adhesive dispensed.

[0006] To achieve the above objectives, this application provides a high-voltage DC relay, comprising:

[0007] Main stationary contact;

[0008] An insulating cover is provided with a receiving structure for mounting the main stationary contact, the main stationary contact having a lead-out end extending to the outside of the insulating cover;

[0009] An insulating layer covers the upper surface of the insulating cover, and the insulating layer has a first mounting hole corresponding to the receiving structure, and an annular gap is formed between the first mounting hole and the lead-out end;

[0010] The housing includes a top wall structure located above the insulating layer, the top wall structure having a second mounting hole, the outer circumference of the second mounting hole having an annular flange extending toward the interior of the first mounting hole, the annular flange forming an annular groove with the lead-out end.

[0011] Optionally, the lower side of the annular retaining edge abuts against the upper surface of the insulating cover.

[0012] Optionally, the annular retaining edge is coaxially arranged with the second mounting hole, and the inner diameter of the annular retaining edge is the same as the diameter of the second mounting hole, or the inner diameter of the annular retaining edge is larger than the diameter of the second mounting hole.

[0013] Optionally, the diameter of the first mounting hole is equal to the outer diameter of the annular flange.

[0014] Optionally, the diameter of the first mounting hole is larger than the outer diameter of the annular flange, so as to form an assembly gap between the inner wall of the first mounting hole and the outer wall of the annular flange.

[0015] Optionally, the inner ring of the annular retaining edge is a hollow, frustum-shaped structure that is narrower at the top and wider at the bottom, forming the inclined inner wall of the annular retaining edge.

[0016] Optionally, it also includes an auxiliary stationary contact, one end of which extends into the insulating cover and the other end is inserted into the insulating layer;

[0017] The insulating layer is an injection molded part, and an auxiliary lead-out piece is integrally injection molded inside the insulating layer. One end of the auxiliary lead-out piece is electrically connected to the auxiliary stationary contact, and the other end extends out of the housing.

[0018] Optionally, the insulating layer has downwardly extending column feet on two opposite sides, a magnetic steel bracket is sleeved on the outside of the insulating cover, a magnet is held between the magnetic steel bracket and the side wall of the insulating cover, and the column feet form a limiting fit with the magnetic steel bracket and / or the upper edge of the magnet.

[0019] Optionally, the insulating cover is a ceramic cover, the housing includes a downwardly extending side wall structure, the side wall structure is integrally formed with the top wall structure, the lower end of the side wall structure is connected to a base, and the housing and the base enclose a cavity structure for accommodating the ceramic cover.

[0020] Optionally, it further includes a magnetic circuit mechanism located within the cavity structure, with the insulating cover positioned above the magnetic circuit mechanism, the magnetic circuit mechanism comprising:

[0021] Stator assembly fixed in the cavity structure;

[0022] A moving part assembly extends into the insulating cover, and the moving part assembly is connected to an active contact and an auxiliary moving contact.

[0023] The beneficial effects of this application are that, through the annular groove formed by the annular flange of the housing and the lead-out end of the main stationary contact, adhesive only needs to be dispensed in the annular groove during production, simplifying the dispensing process; and compared with the technical solution of dispensing adhesive directly in the annular gap formed by the first mounting hole and the lead-out end of the main stationary contact, this application reduces the accommodating volume of the annular gap by using the annular flange, that is, the annular groove can accommodate less adhesive, thereby reducing the total amount of adhesive dispensed and lowering production costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the high-voltage DC relay structure provided in the embodiments of this application;

[0026] Figure 2 This is a cross-sectional view of a high-voltage DC relay provided in an embodiment of this application;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the internal structure of the high-voltage DC relay provided in the embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the shell structure provided in an embodiment of this application.

[0030] In the figure: 1-shell; 101-top wall structure; 102-side wall structure; 1011-annular flange; 1012-second mounting hole;

[0031] 2-Main stationary contact; 201-Lead-out terminal;

[0032] 3-Insulation layer; 301-Post base; 302-First mounting hole;

[0033] 4-Annular groove; 5-Insulating cover; 6-Magnet support; 7-Magnet; 8-Coil support; 9-Coil; 10-Base; 11-Motor assembly; 12-Active contact; 13-Auxiliary moving contact; 14-Auxiliary stationary contact; 15-Auxiliary lead-out piece; 16-U-shaped yoke; Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does 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, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please refer to Figures 1 to 3 This embodiment provides a high-voltage DC relay, including a main stationary contact 2, an insulating cover 5, an insulating layer 3, and a housing 1. The insulating cover 5 is provided with a receiving structure for mounting the main stationary contact 2. The receiving structure can be a mounting hole opened on the insulating cover 5, and the main stationary contact 2 can be fixed in the mounting hole. The main stationary contacts 2 are arranged in pairs, and the insulating cover 5 is provided with at least one set of main stationary contacts 2. One end of the main stationary contact 2 extends into the insulating cover 5, and the other end has a lead-out end 201 extending to the outside of the insulating cover 5. External circuits can be electrically connected to the main stationary contact 2 through the lead-out end 201.

[0038] An insulating layer 3 covers the upper surface of the insulating cover 5. The insulating layer 3 is provided with a first mounting hole 302 corresponding to the receiving structure. The main stationary contact 2 can pass through the first mounting hole 302 and the receiving structure in sequence. The diameter of the first mounting hole 302 is larger than the diameter of the receiving structure, and the diameter of the first mounting hole 302 is larger than the diameter of the lead-out end 201 of the main stationary contact 2, so that an annular gap is formed between the first mounting hole 302 and the lead-out end 201.

[0039] The housing 1 includes a top wall structure 101 located above the insulating layer 3, please refer to... Figure 5 The top wall structure 101 and the insulating cover 5 cooperate to limit the insulation layer 3 in the vertical direction. A second mounting hole is provided on the top wall structure 101. The second mounting hole corresponds to the first mounting hole 302 in the height direction. That is, the main stationary contact 2 passes through the second mounting hole, the first mounting hole 302 and the receiving structure in sequence.

[0040] Please refer to Figure 3 The second mounting hole has an annular retaining edge 1011 extending into the first mounting hole 302 on its outer ring. An annular groove 4 is formed between the annular retaining edge 1011 and the lead-out end 201, surrounding the outer periphery of the lead-out end 201 of the main stationary contact 2. It can be seen that by setting the annular retaining edge 1011, on the one hand, glue can be directly dispensed into the annular groove 4 formed between the annular retaining edge and the lead-out end 201, reducing the glue dispensing process and making it simple and easy to operate; on the other hand, the size of the annular gap formed between the first mounting hole 302 and the lead-out end 201 can be reduced, that is, the amount of glue that the annular groove 4 can hold is significantly smaller than the amount of glue that the annular gap can hold, thereby reducing the total amount of glue dispensed.

[0041] In summary, the annular groove 4 formed by the annular baffle 1011 of the housing 1 and the lead-out end 201 of the main stationary contact 2 simplifies the dispensing process by requiring only dispensing of adhesive within the annular groove 4 during production. Furthermore, compared to the technical solution of dispensing adhesive directly within the annular gap formed by the first mounting hole 302 and the lead-out end 201 of the main stationary contact 2, the present application reduces the accommodating volume of the annular gap by using the annular baffle 1011, meaning that the annular groove 4 can accommodate less adhesive, thereby reducing the total amount of adhesive dispensed and lowering production costs.

[0042] Please refer to Figure 3 The lower side of the annular retaining edge 1011 abuts against the upper surface of the insulating cover 5, while the upper side of the annular retaining edge 1011 is connected to or integrally formed with the top wall structure 101. This reduces the radial outward overflow of the adhesive within the annular groove 4, allowing the adhesive to concentrate within the annular groove 4 and ensuring the insulation of the outer periphery of the lead-out end 201. A sealing element, such as a sealing gasket, can be provided on the upper surface of the insulating cover 5. The lower side of the annular retaining edge 1011 can abut against the sealing element, thereby forming a sealed annular groove 4 to prevent adhesive overflow.

[0043] The annular retaining edge 1011 is coaxially arranged with the second mounting hole 1012, or the annular retaining edge 1011, the second mounting hole 1012 and the first mounting hole 302 are coaxially arranged, so that the annular width at each position on the annular groove 4 is consistent, thereby making the annular groove 4 on the outer periphery of the lead-out end 201 have a consistent annular width. After the glue is applied, it can be ensured that the outer periphery of the lead-out end 201 has the same insulation thickness, avoiding the situation of poor local insulation effect caused by the difference in insulation thickness.

[0044] Based on this, the inner diameter of the annular retaining edge 1011 can be the same as the diameter of the second mounting hole 1012, meaning the inner wall of the second mounting hole 1012 and the inner wall of the annular retaining edge 1011 are coplanar in the axial direction. This makes it easier for the adhesive to enter and reach the bottom of the annular groove 4 during dispensing, thus making it easier for the adhesive to fill the annular groove 4. Alternatively, the inner diameter of the annular retaining edge 1011 can be larger than the diameter of the second mounting hole 1012, meaning the inner wall of the second mounting hole 1012 and the inner wall of the annular retaining edge 1011 are not coplanar in the axial direction. This results in the diameter of the adhesive in the annular groove 4 being larger than the diameter of the second mounting hole 1012 during dispensing. This allows the second mounting hole 1012 to have a limiting effect on the adhesive in the axial direction, ensuring the stability of the adhesive and further improving the insulation effect of the outer periphery of the lead-out end 201.

[0045] In some embodiments, the diameter of the first mounting hole 302 can be equal to the outer diameter of the annular flange 1011. In this case, after the annular flange 1011 is inserted into the first mounting hole 302, the inner wall of the first mounting hole 302 abuts against the outer wall of the annular flange 1011, so that the annular flange 1011 limits the insulation layer 3 in the horizontal direction, avoiding failure of the electrical connection part caused by the horizontal displacement of the insulation layer 3.

[0046] The diameter of the first mounting hole 302 can also be larger than the outer diameter of the annular retaining edge 1011, thereby forming an assembly gap between the inner wall of the first mounting hole 302 and the outer wall of the annular retaining edge 1011. During assembly, the presence of the assembly gap makes it easier to insert the annular retaining edge 1011 into the first mounting hole 302. At the same time, the smaller size of the assembly gap also allows the annular retaining edge 1011 to play a certain horizontal limiting role on the insulating layer 3, preventing excessive displacement of the insulating layer 3.

[0047] The above embodiments indicate that the inner ring of the annular retaining edge 1011 is a columnar hollow structure. In some embodiments, the inner ring of the annular retaining edge 1011 can also be constructed as a frustum-shaped hollow structure that is narrower at the top and wider at the bottom. The upper diameter of the frustum-shaped hollow structure is the same as the diameter of the second mounting hole 1012, and the lower diameter is larger than the diameter of the second mounting hole 1012, thereby forming an inclined inner wall structure for the annular retaining edge 1011. During dispensing, the adhesive will generate an outwardly inclined surface in the annular groove 4 that matches the inner wall of the annular retaining edge 1011, thereby achieving a wedge-shaped surface fit between the adhesive and the annular retaining edge 1011, ensuring the axial limiting fit between the annular retaining edge 1011 and the adhesive.

[0048] The relay also includes an auxiliary stationary contact 14, please refer to... Figure 2 and Figure 4One end of the auxiliary stationary contact 14 extends into the insulating cover 5, and the other end is inserted into the socket on the insulating layer 3. The insulating layer 3 can be an injection molded part, and an auxiliary lead-out piece 15 is injection molded in the insulating layer 3. One end of the auxiliary lead-out piece 15 is located at the socket position of the insulating layer 3 to achieve electrical conduction with the auxiliary stationary contact 14. The other end of the auxiliary lead-out piece 15 extends out of the housing 1 and can be connected to an external circuit.

[0049] Please refer to Figure 4 The insulating layer 3 has downwardly extending column feet 301 on two opposite sides. The insulating cover 5 is fitted with a magnetic steel bracket 6. A magnet 7 is held between the magnetic steel bracket 6 and the side wall of the insulating cover 5. The specific arrangement and working principle of the magnetic steel bracket 6 and the magnet 7 will not be described here. Please refer to the existing technology.

[0050] The column base 301 can form a limiting engagement with the upper edge of the magnet bracket 6 and / or the magnet 7. Please refer to [reference needed]. Figure 3 The limiting fit here includes limiting contact, limiting snap-fit, plug-in, etc., and the limiting snap-fit ​​forms include but are not limited to snap-fit ​​connection, adhesive connection, etc., which will not be elaborated here, and all fall within the protection scope of this application.

[0051] The insulating cover 5 is a ceramic cover made of ceramic material. The housing 1 also includes a downwardly extending side wall structure 102, which is integrally formed with the top wall structure 101. The lower end of the side wall structure 102 is connected to a base 10. The housing 1 and the base 10 enclose a cavity structure to accommodate the ceramic cover. The interior of the insulating cover 5 forms the working space for the contacts.

[0052] The relay also includes a magnetic circuit mechanism located in the aforementioned cavity structure; please refer to... Figure 2 and Figure 4 The insulating cover 5 is located on the upper side of the magnetic circuit mechanism, and under the limiting action of the housing 1 and the base 10, the insulating cover 5 and the magnetic circuit mechanism can be stably limited in the cavity structure. Specifically, the cooperation between the top wall structure 101 of the housing 1 and the base 10 can limit the insulating cover 5 and the magnetic circuit mechanism in the vertical direction, and the side wall structure 102 can limit the insulating cover 5 and the magnetic circuit mechanism in the horizontal direction, thereby ensuring the stability of the insulating cover 5, the magnetic circuit mechanism and other components located in the cavity structure.

[0053] The magnetic circuit mechanism includes a stator assembly fixed in the cavity structure and a mover assembly 11 extending into the insulating cover 5. The mover assembly 11 is connected to an active contact 12 and an auxiliary moving contact 13. Both the active contact 12 and the auxiliary moving contact 13 are located inside the insulating cover 5. The mover assembly 11 moves under the drive of the stator assembly, thereby driving the active contact 12 and the auxiliary moving contact 13 to move, thereby realizing the electrical conduction of the main stationary contact 2 and the auxiliary stationary contact 14.

[0054] The moving part 11 can be a transmission device including a magnet, and the stator part is a drive device including a coil 9. The coil 9 generates a magnetic field when energized, and the magnet can drive the transmission device to move under the action of the magnetic field, thereby moving the active contact 12 and the auxiliary moving contact 13.

[0055] Specifically, the stator assembly includes a U-shaped yoke 16, a coil support 8, and a coil 9. The U-shaped yoke 16 is fixedly mounted on the base 10. The coil support 8 is located within the U-shaped structure of the U-shaped yoke 16. The coil support 8 has an axial cavity in the middle for the movement of the mover assembly 11. The coil 9 is sleeved on the coil support 8 around the axial cavity and is used to generate a magnetic field that drives the magnet to move axially.

[0056] The moving part assembly 11 includes a magnet, a transmission rod, and a lifting bracket. The magnet is located in the axial cavity. One end of the transmission rod is connected to the magnet, and the other end extends into the insulating cover 5. A lifting bracket is provided at the end of the transmission rod. The active contact 12 and the auxiliary moving contact 13 are provided on the lifting bracket. The magnet moves towards the insulating cover 5 in the magnetic field generated by the coil 9, thereby driving the transmission rod to move towards the main stationary contact 2 (auxiliary stationary contact 14). In turn, the transmission rod pushes the active contact 12 (auxiliary moving contact 13) on the lifting bracket to move towards the main stationary contact 2 (auxiliary stationary contact 14), thereby realizing the electrical conduction of the main stationary contact 2 and the auxiliary stationary contact 14.

[0057] Considering that the active contact 12 should separate from the main stationary contact 2 after the magnetic field generated by coil 9 disappears, an elastic element can be sleeved on the outer periphery of the transmission rod. The elastic force of the elastic element can be used to reset the transmission rod and the magnet, so that the active contact 12 and the auxiliary moving contact 13 are ready for the next operation.

[0058] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0059] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A high-voltage DC relay, characterized in that, include: Main stationary contact (2); The insulating cover (5) is provided with a receiving structure for mounting the main stationary contact (2), the main stationary contact (2) having an outlet (201) extending to the outside of the insulating cover (5). An insulating layer (3) is provided on the upper surface of the insulating cover (5). The insulating layer (3) is provided with a first mounting hole (302) corresponding to the receiving structure. An annular gap is formed between the first mounting hole (302) and the lead-out end (201). The housing (1) includes a top wall structure (101) located above the insulating layer (3), the top wall structure (101) having a second mounting hole (1012), the outer circumference of the second mounting hole (1012) having an annular flange (1011) extending toward the interior of the first mounting hole (302), the annular flange (1011) and the lead-out end (201) forming an annular groove (4).

2. The high-voltage DC relay according to claim 1, characterized in that, The lower side of the annular retaining edge (1011) abuts against the upper surface of the insulating cover (5).

3. The high-voltage DC relay according to claim 1, characterized in that, The annular retaining edge (1011) is coaxially arranged with the second mounting hole (1012), and the inner diameter of the annular retaining edge (1011) is the same as the diameter of the second mounting hole (1012), or the inner diameter of the annular retaining edge (1011) is larger than the diameter of the second mounting hole (1012).

4. The high-voltage DC relay according to claim 1, characterized in that, The diameter of the first mounting hole (302) is equal to the outer diameter of the annular flange (1011).

5. The high-voltage DC relay according to claim 1, characterized in that, The diameter of the first mounting hole (302) is larger than the outer diameter of the annular flange (1011) to form an assembly gap between the inner wall of the first mounting hole (302) and the outer wall of the annular flange (1011).

6. The high-voltage DC relay according to claim 1, characterized in that, The inner ring of the annular retaining edge (1011) is a hollow, frustum-shaped structure that is narrow at the top and wide at the bottom, forming the inclined inner wall of the annular retaining edge (1011).

7. The high-voltage DC relay according to claim 1, characterized in that, It also includes an auxiliary stationary contact (14), one end of which extends into the insulating cover (5) and the other end is inserted into the insulating layer (3); The insulating layer (3) is an injection molded part. An auxiliary lead-out piece (15) is integrally injection molded inside the insulating layer (3). One end of the auxiliary lead-out piece (15) is electrically connected to the auxiliary stationary contact (14), and the other end is led out to the outside of the housing (1).

8. The high-voltage DC relay according to claim 1, characterized in that, The insulating layer (3) has downwardly extending column feet (301) on two opposite sides. The insulating cover (5) is fitted with a magnetic steel bracket (6). A magnet (7) is held between the magnetic steel bracket (6) and the side wall of the insulating cover (5). The column feet (301) form a limiting fit with the upper edge of the magnetic steel bracket (6) and / or the magnet (7).

9. The high-voltage DC relay according to claim 1, characterized in that, The insulating cover (5) is a ceramic cover. The housing (1) includes a downwardly extending side wall structure (102). The side wall structure (102) is integrally formed with the top wall structure (101). The lower end of the side wall structure (102) is connected to a base (10). The housing (1) and the base (10) enclose each other to form a cavity structure for accommodating the ceramic cover.

10. The high-voltage DC relay according to claim 9, characterized in that, It also includes a magnetic circuit mechanism located in the cavity structure, the insulating cover (5) being located above the magnetic circuit mechanism, the magnetic circuit mechanism comprising: Stator assembly fixed in the cavity structure; The moving part assembly (11) extends into the insulating cover (5), and the moving part assembly (11) is connected to an active contact (12) and an auxiliary moving contact (13).

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