A high-voltage relay

Abstract

The application discloses a high-voltage relay and relates to the technical field of relays, which comprises an insulating cover provided with a mounting structure for accommodating two main static contacts, the main static contacts have contact ends extending into the interior of the insulating cover and leading-out ends extending out of the exterior of the insulating cover, an insulating support fixed in the insulating cover, the insulating support is provided with a mounting opening covering at least part of the contact ends, a connecting plate fixed between the two contact ends, the plate surface of the connecting plate is perpendicular to the main static contacts, wiring terminals and micro switches are distributed at the two ends of the connecting plate, the distribution direction of the wiring terminals and the micro switches is perpendicular to the distribution direction of the two main static contacts, and an insulating sheet is located between the upper surface of the insulating support and the top wall of the insulating cover and comprises a bridge spanning above the connecting plate between the micro switches and the wiring terminals and extension arms located at the two sides of the bridge, each extension arm extends along the circumference of the contact end. The overall insulation performance of the relay is improved, the space utilization in the insulating cover is improved, and the structure is more compact.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a high-voltage 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] Current relays typically have insulating components arranged on the outside of the insulating cover. These insulating components can achieve electrical isolation between the leads of the stationary contacts, and can also be welded to conduct through an injection-molded integral part. However, this method not only increases the assembly difficulty, but also cannot guarantee effective electrical isolation between the main contact mechanism and the auxiliary contact mechanism inside the insulating cover, resulting in poor insulation performance.

[0004] Therefore, in view of the above-mentioned defects, how to provide a high-voltage relay with good insulation performance 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 relay that improves the overall insulation performance of the relay.

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

[0007] An insulating cover is provided with a mounting structure for accommodating two main stationary contacts, wherein the main stationary contacts have a contact end that extends into the interior of the insulating cover and a lead-out end that extends out of the insulating cover;

[0008] An insulating bracket is fixed inside the insulating cover, and the insulating bracket has a mounting opening that at least partially covers the contact end;

[0009] A connecting plate is fixed between the two contact ends. The surface of the connecting plate is perpendicular to the main stationary contact. Terminals and microswitches are distributed at both ends of the connecting plate. The distribution direction of the terminals and microswitches is perpendicular to the distribution direction of the two main stationary contacts.

[0010] An insulating sheet, located between the upper surface of the insulating support and the top wall of the insulating cover, includes: a bridge spanning above the connecting plate between the micro switch and the terminal block; and extension arms located on both sides of the bridge, each of the extension arms extending circumferentially along the contact end.

[0011] Optionally, the upper edge of the mounting port is provided with an upper protrusion protruding from the upper surface of the insulating bracket. The upper protrusion has an outer wall that mates with the inner wall of the extension arm, and the height of the upper protrusion is not greater than the thickness of the extension arm.

[0012] Optionally, the extension arm is integrally formed with the cable tray, the mounting opening is semi-circular, the semi-circular structures of the two mounting openings are arranged opposite to each other, and the extension arm is an arc or semi-circular shape adapted to the mounting opening.

[0013] Optionally, the insulating bracket located between the two mounting ports is provided with a recessed groove, the connecting plate is embedded in the recessed groove, and the upper surface of the connecting plate is not higher than the upper surface of the insulating bracket.

[0014] Optionally, a positioning post is provided in the sinking trough, and a positioning hole is provided on the connecting plate to cooperate with the positioning post for positioning the connecting plate. The positioning post is not higher than the depth of the sinking trough.

[0015] Optionally, the terminal block extends through the connecting plate and is welded to a welding terminal on the lower surface of the connecting plate; the micro switch is located on the lower surface of the connecting plate and is electrically connected to the terminal block.

[0016] Optionally, the insulating sheet is interference-fitted between the insulating cover and the insulating support, and the top wall of the insulating cover is spaced apart from the upper surface of the insulating support.

[0017] Optionally, the cable tray is located above the sinkhole, and the upper surface of the connecting plate is spaced apart from the cable tray, and the extension arm is interference-fitted with the insulating cover and the insulating support.

[0018] Optionally, the projection of the bridge structure onto the sinkhole falls entirely within the sinkhole.

[0019] Optionally, it also includes a base plate, the insulating cover being fixedly connected to the base plate, and the top wall of the insulating cover pressing down on the insulating sheet and the insulating support to press the insulating support tightly onto the base plate.

[0020] The beneficial effects of this application are that the micro switch and the terminal block are located at opposite ends of the connecting plate, providing insulation between high and low voltages. Simultaneously, the insulating sheet is arranged inside the insulating cover, fully utilizing the internal space, improving structural compactness, reducing assembly difficulty, and achieving electrical isolation between the micro switch and the terminal block through the insulating sheet's bridge. Furthermore, the extended arms on both sides of the bridge can respectively cover the outer periphery of the contact ends of the main stationary contacts, increasing the insulation performance between the two main stationary contacts. In addition, the insulating sheet is located between the upper surface of the insulating support and the top wall of the insulating cover, and the bridge of the insulating sheet spans across the connecting plate between the micro switch and the terminal block, further improving the insulation performance between the main stationary contacts, the terminal block, the micro switch, and the connecting plate, thereby ensuring the overall insulation performance of the relay. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the internal structure of the insulating cover provided in an embodiment of this application;

[0023] Figure 2 This is an exploded view of the internal structure of the insulating cover provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the insulating sheet structure provided in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the mating structure of the insulating cover, insulating support, and base plate provided in the embodiments of this application;

[0026] Figure 5 This is an internal cross-sectional view of the insulating cover provided in an embodiment of this application;

[0027] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 This is a schematic diagram of the cooperation structure between the insulating cover and the magnetic circuit mechanism provided in the embodiments of this application;

[0029] Figure 8 This is a cross-sectional view showing the interaction between the insulating cover and the magnetic circuit mechanism provided in an embodiment of this application.

[0030] In the diagram: 1-Main stationary contact; 2-Insulating sheet; 3-Terminal; 4-Connecting plate; 5-Micro switch; 6-Insulating bracket; 7-Base plate; 8-Insulating cover; 9-Magnet bracket; 10-Magnet; 11-Wire; 12-U-shaped yoke; 13-Circuit board; 14-Coil bracket; 15-Coil; 16-Active contact; 17-Magnet; 18-Transmission rod;

[0031] 201 - Cable tray; 202 - Extension arm;

[0032] 401 - Welding terminal;

[0033] 601 - Mounting port; 602 - Recessed groove; 603 - Positioning post;

[0034] 901 - Conductor segment; 902 - Conductor groove. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Please refer to Figures 1 to 8 This embodiment provides a high-voltage relay, including an insulating cover 8, an insulating bracket 6, and a connecting plate 4. The insulating cover 8 can be a ceramic cover made of ceramic material. The insulating cover 8 is provided with a mounting structure to accommodate two main stationary contacts 1. The mounting structure can be an assembly hole opened on the insulating cover 8, and the main stationary contacts 1 can be fixed in the assembly hole. The main stationary contacts 1 are arranged in pairs, and the insulating cover 8 is provided with at least one set of main stationary contacts 1. The main stationary contacts 1 have a contact end that extends into the interior of the insulating cover 8 and a lead-out end that leads out of the exterior of the insulating cover 8. External circuits can be electrically connected to the main stationary contacts 1 through the lead-out end.

[0039] An insulating bracket 6 is fixed inside an insulating cover 8. The insulating bracket 6 can be a plastic bracket. The insulating bracket 6 has a mounting opening 601 for accommodating the contact end of the main stationary contact 1, and the mounting opening 601 covers at least part of the contact end.

[0040] The connecting plate 4 is fixedly disposed between the contact ends of the two main stationary contacts 1. The plate surface of the connecting plate 4 is perpendicular to the main stationary contacts 1, and terminal blocks 3 and micro switches 5 are distributed at both ends of the connecting plate 4. The distribution direction of the terminal blocks 3 and micro switches 5 is perpendicular to the distribution direction of the two main stationary contacts 1. That is, if the two main stationary contacts 1 are distributed horizontally, then the terminal blocks 3 and micro switches 5 are also distributed horizontally, and the connection line between the terminal blocks 3 and micro switches 5 is perpendicular to the connection line between the two main stationary contacts 1 in the horizontal plane.

[0041] Alternatively, the two main stationary contacts 1, the terminal block 3, and the micro switch 5 are arranged in a cross shape, so that the four can be kept as far apart as possible in a limited space, thereby achieving insulation between high and low voltage and improving the insulation effect of the four.

[0042] The insulating sheet 2 is located between the upper surface of the insulating support 6 and the top wall of the insulating cover 8, and between the contact ends of the two main stationary contacts 1. The insulating sheet 2 includes a bridge 201 and an extension arm 202. The bridge 201 spans above the connecting plate 4 between the micro switch 5 and the terminal block 3, which can further improve the insulation effect between the micro switch 5 and the terminal block 3. At the same time, the extension arms 202 are located on both sides of the bridge 201, and each extension arm 202 extends circumferentially along the contact end of the main stationary contact 1, thereby increasing the insulation between the two main stationary contacts 1. It should be noted that after extending a certain length, the extension arms 202 can also extend between the main stationary contact 1 and the terminal block 3, and between the main stationary contact 1 and the micro switch 5, thereby increasing the insulation between the main stationary contact 1 and the micro switch 5 and the terminal block 3.

[0043] As can be seen, this application arranges the insulating bracket 6, connecting plate 4, and insulating sheet 2 inside the insulating cover 8, making full use of the internal space of the insulating cover 8, improving structural compactness, and reducing assembly difficulty; the micro switch 5 and the terminal block 3 are respectively arranged at both ends of the connecting plate 4, effectively isolating the potential difference between the two. This horizontal span layout can evenly distribute the electric field intensity, avoiding partial discharge caused by insufficient distance between the terminal block 3 and the micro switch 5, and can play a role in high and low voltage insulation. At the same time, the bridge 201 of the insulating sheet 2 achieves electrical isolation between the micro switch 5 and the terminal block 3; and the extension arms 202 on both sides of the bridge 201 can respectively cover the outer periphery of the contact end of the main stationary contact 1, increasing the insulation performance between the two main stationary contacts 1. In addition, the insulating sheet 2 is located between the upper surface of the insulating support 6 and the top wall of the insulating cover 8, and the bridge 201 of the insulating sheet 2 spans across the connecting plate 4 between the micro switch 5 and the terminal 3, which can also improve the insulation performance between the main stationary contact 1 and the terminal 3, the micro switch 5 and the connecting plate 4, thereby ensuring the overall insulation performance of the relay.

[0044] An upper protrusion protruding from the upper surface of the insulating bracket 6 is provided along the upper edge of the mounting port 601. When the insulating sheet 2 is placed on the upper surface of the insulating bracket 6, the upper protrusion can initially position the insulating sheet 2, thereby allowing the insulating sheet 2 to be accurately positioned between the two main stationary contacts 1, and the extension arm 202 to be accurately positioned on the outer periphery of the contact end of the main stationary contact 1. Specifically, the upper protrusion has an outer wall that mates with the inner wall of the extension arm 202. For example, if the contact end is columnar, the corresponding upper protrusion and extension arm are arc-shaped, so that the inner wall of the extension arm 202 can stably abut against the outer wall of the upper protrusion, thereby achieving the positioning of the insulating sheet 2.

[0045] Furthermore, the height of the upper protrusion is not higher than the thickness of the extension arm 202, so that the upper and lower surfaces of the insulating sheet 2 can contact the upper surface of the insulating bracket 6 and the lower surface of the top wall of the insulating cover 8 respectively, thereby achieving further positioning of the insulating sheet 2 through compression.

[0046] The extension arm 202 is integrally formed with the cable tray 201, and the mounting port 601 is semi-circular. The two mounting ports 601 are arranged opposite each other. The extension arm 202 is arc-shaped or semi-circular and adapted to the mounting port 601, so that the two extension arms 202 can cover the opposite surface of the contact end of the main stationary contact 1, thereby ensuring the insulation effect of the two main stationary contacts 1.

[0047] An insulating bracket 6 located between two mounting ports 601 is provided with a recessed groove 602. The connecting plate 4 can be embedded in the recessed groove 602, and the upper surface of the connecting plate 4 is not higher than the upper surface of the insulating bracket 6, so that the insulating sheet 2 will not be affected by the connecting plate 4 when it is arranged.

[0048] A positioning post 603 is provided in the sinking trough 602, and a positioning hole is provided on the connecting plate 4 to cooperate with the positioning post 603, which can ensure that the connecting plate 4 is stably positioned on the insulating bracket 6. Furthermore, the height of the positioning post 603 is not higher than the depth of the sinking trough 602, so that the positioning post 603 will not affect the stable arrangement of the insulating sheet 2.

[0049] Terminal 3 is installed through the connecting plate 4, and after passing through the connecting plate 4, its lower end is welded to the welding terminal 401 on the lower surface of the connecting plate 4; micro switch 5 is located on the lower surface of the connecting plate 4 and is electrically connected to terminal 3.

[0050] It can be seen that the connecting plate 4, the welding terminal 401 and the micro switch 5 are all lower than the upper surface of the insulating bracket 6, thus forming a space above the connecting plate 4 in the sink 602.

[0051] Furthermore, the insulating sheet 2 is interference-fitted between the insulating cover 8 and the insulating support 6, achieving relative fixation between the insulating cover 8, the insulating sheet 2, and the insulating support 6. That is to say, the insulating cover 8 and the insulating support 6 do not directly contact each other, but are assembled through the insulating sheet 2. This interference fit ensures that the supporting insulating support 6 does not wobble, and also avoids the risk of air leakage during laser welding caused by an excessively high insulating support 6.

[0052] The direct rigid connection between the top wall of the insulating cover 8 and the upper surface of the insulating bracket 6 is prone to air leakage. Therefore, the assembly method of this application has a higher yield and a longer service life.

[0053] Based on this, the cable tray 201 can be located above the sink 602. At this time, the lower surface of the cable tray 201 can be flush with the upper surface of the insulating support 6. However, due to the use of an interference fit for assembly, during assembly, the top wall of the insulating cover 8 and the upper surface of the insulating support 6 can compress the extension arm 202. The cable tray 201, due to its correspondence with the sink 602 and the existence of the aforementioned remaining space, is only subjected to the downward pressure of the insulating cover 8.

[0054] In some embodiments, the projection of the cable tray 201 onto the recessed groove 602 falls completely within the recessed groove 602, meaning the width of the cable tray is less than the width of the recessed groove 602, and the side of the cable tray is within the inner side of the recessed groove 602, ensuring that the cable tray 201 can completely correspond to the recessed groove 602. Simultaneously, the cable tray 201 does not affect the arrangement of the wiring terminals 3 on both sides of the connecting plate 4 and the micro switch 5, improving the overall stability and insulation of the relay.

[0055] This application also includes a base plate 7, an insulating cover 8 which can be welded to the base plate 7 via an adapter, and in the height direction, the top wall of the insulating cover 8 presses down the insulating sheet 2 and the insulating bracket 6 to press the insulating bracket 6 onto the base plate 7.

[0056] A magnetic steel bracket 9 is provided on the outside of the insulating cover 8. A magnet 10 is held between the magnetic steel bracket 9 and the side wall of the insulating cover 8. The magnetic steel bracket 9 and the magnet 10 are distributed on both sides of the insulating cover 8, and the two magnetic steel brackets 9 extend towards the center line of the insulating cover 8, forming a conductor segment 901 away from the insulating cover 8 at the center line position. A conductor groove 902 is formed between the conductor segment 901 and the insulating cover 8. The conductor 11 of the terminal 3 passes through the conductor groove 902 and is led to the magnetic circuit mechanism on the lower side of the insulating cover 8, and is electrically connected to the circuit board 13 of the magnetic circuit mechanism.

[0057] Specifically, the magnetic circuit mechanism is located under the insulating cover 8. A housing is fitted around the magnetic circuit mechanism and the magnet support 9. The top wall of the housing corresponds to the top wall of the insulating cover 8, and the side walls of the housing correspond to the magnet support 9 and the magnetic circuit mechanism. A base is provided at the bottom of the housing. Under the limiting action of the housing and the base, the insulating cover 8 and the magnetic circuit mechanism can be stably limited in the cavity structure. Specifically, the cooperation between the top wall of the housing and the base can limit the insulating cover 8 and the magnetic circuit mechanism in the vertical direction, and the side wall of the housing can limit the insulating cover 8 and the magnetic circuit mechanism in the horizontal direction, thereby ensuring the stability of the insulating cover 8, the magnetic circuit mechanism and other components.

[0058] Furthermore, the magnetic circuit mechanism includes a stator assembly and a mover assembly extending into the insulating cover 8. The mover assembly is connected to an active contact 16 and a follower arm. Both the active contact 16 and the follower arm are located within the insulating support 6. The mover assembly moves under the drive of the stator assembly, thereby driving the active contact 16 and the follower arm to move, thereby realizing the electrical conduction of the main stationary contact 1. The follower arm can correspond to the micro switch 5, so that the micro switch 5 can electrically conduct the two terminals 3.

[0059] The moving part assembly can be a transmission device including a magnet 17, and the stator assembly can be a drive device including a coil 15. The coil 15 generates a magnetic field when energized, and the magnet 17 can drive the transmission device to move under the action of the magnetic field, thereby causing the active contact 16 and the follower arm to move.

[0060] Specifically, the stator assembly includes a U-shaped yoke 12, a coil support 14, and a coil 15. The U-shaped yoke 12 is fixedly mounted on the base, and the coil support 14 is located within the U-shaped structure of the U-shaped yoke 12. The coil support 14 has an axial cavity in the middle for the movement of the mover assembly. The coil 15 is sleeved on the coil support 14 around the axial cavity and is used to generate a magnetic field that drives the magnet 17 to move axially.

[0061] The moving part assembly includes a magnet 17, a transmission rod 18, and a lifting bracket. The magnet 17 is located in the axial cavity. One end of the transmission rod 18 is connected to the magnet 17, and the other end extends through the base plate 7 into the insulating cover 8 and the insulating bracket 6. A lifting bracket is provided at the end. The active contact 16 and the follower arm are provided on the lifting bracket. The magnet 17 moves towards the insulating cover 8 in the magnetic field generated by the coil 15, thereby driving the transmission rod 18 to move towards the main stationary contact 1 (micro switch 5). In turn, the transmission rod 18 pushes the active contact 16 (follower arm) on the lifting bracket to move towards the main stationary contact 1 (micro switch 5), thereby realizing the electrical conduction of the main stationary contact 1 and the electrical conduction of the terminal 3.

[0062] Considering that the active contact 16 should separate from the main stationary contact 1 after the magnetic field generated by the coil 15 disappears, an elastic element can be sleeved on the outer periphery of the transmission rod 18. The elastic force of the elastic element can be used to reset the transmission rod 18 and the magnet 17, so that the active contact 16 and the follower arm are ready for the next action.

[0063] The circuit board 13 can be set inside the U-shaped yoke 12 to utilize the internal space of the U-shaped yoke 12 and avoid the circuit board 13 occupying extra space. The coil 15 and the wire 11 can be led out of the housing through the circuit board 13 to realize the connection between the coil 15 and the wire 11 and the external circuit.

[0064] In some embodiments, the height of the magnet 10 is lower than the upper surface of the magnet bracket 9, and the height of the magnet bracket 9 is higher than the upper surface of the insulating cover 8, thereby forming a glue groove. During assembly, after wiring the terminal 3, glue is applied to the terminal 3 and the upper surface of the insulating cover 8. After glue application, the housing is installed. The glue covers the upper surface of the insulating cover 8 under the pressure of the housing, achieving effective insulation between the leads of the main stationary contact 1, as well as effective insulation between the terminal 3 and between the terminal 3 and the leads of the main stationary contact 1.

[0065] 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.

[0066] 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 relay, characterized in that, include: The insulating cover (8) is provided with a mounting structure for accommodating two main stationary contacts (1), wherein the main stationary contacts (1) have a contact end that extends into the interior of the insulating cover (8) and a lead-out end that extends out of the exterior of the insulating cover (8); An insulating bracket (6) is fixed inside the insulating cover (8), and the insulating bracket (6) has a mounting opening (601) that covers at least part of the contact end. A connecting plate (4) is fixed between the two contact ends. The plate surface of the connecting plate (4) is perpendicular to the main stationary contact (1). Terminals (3) and micro switches (5) are distributed at both ends of the connecting plate (4). The distribution direction of the terminals (3) and the micro switches (5) is perpendicular to the distribution direction of the two main stationary contacts (1). An insulating sheet (2) is located between the upper surface of the insulating support (6) and the top wall of the insulating cover (8), including: a bridge (201) spanning above the connecting plate (4) between the micro switch (5) and the terminal block (3); Extension arms (202) are located on both sides of the bridge (201), and each extension arm (202) extends circumferentially along the contact end.

2. The high-voltage relay according to claim 1, characterized in that, The mounting port (601) has an upper protrusion protruding from the upper surface of the insulating bracket (6) along its upper edge. The upper protrusion has an outer wall that cooperates with the inner wall of the extension arm (202), and the height of the upper protrusion is not higher than the thickness of the extension arm (202).

3. The high-voltage relay according to claim 1, characterized in that, The extension arm (202) is integrally formed with the cable tray (201), the mounting port (601) is semi-circular, the two mounting ports (601) are arranged opposite to each other, and the extension arm (202) is arc-shaped or semi-circular to match the mounting port (601).

4. The high-voltage relay according to claim 1, characterized in that, The insulating bracket (6) located between the two mounting ports (601) is provided with a recessed groove (602), the connecting plate (4) is embedded in the recessed groove (602), and the upper surface of the connecting plate (4) is not higher than the upper surface of the insulating bracket (6).

5. The high-voltage relay according to claim 4, characterized in that, The sinking trough (602) is provided with a positioning post (603), and the connecting plate (4) is provided with a positioning hole that cooperates with the positioning post (603) to position the connecting plate (4). The positioning post (603) is not higher than the depth of the sinking trough (602).

6. The high-voltage relay according to claim 1, characterized in that, The terminal block (3) passes through the connecting plate (4) and is welded to the welding terminal (401) on the lower surface of the connecting plate (4); the micro switch (5) is located on the lower surface of the connecting plate (4) and is electrically connected to the terminal block (3).

7. The high-voltage relay according to claim 1, characterized in that, The insulating sheet (2) is interference-fitted between the insulating cover (8) and the insulating support (6), and the top wall of the insulating cover (8) is spaced apart from the upper surface of the insulating support (6).

8. The high-voltage relay according to claim 4, characterized in that, The cable tray (201) is located above the sinkhole (602), and the upper surface of the connecting plate (4) is spaced apart from the cable tray (201). The extension arm (202) is interference-fitted with the insulating cover (8) and the insulating bracket (6).

9. The high-voltage relay according to claim 8, characterized in that, The projection of the cable tray (201) onto the sinkhole (602) falls completely into the sinkhole (602).

10. The high-voltage relay according to claim 1, characterized in that, It also includes a base plate (7), the insulating cover (8) is fixedly connected to the base plate (7), and the top wall of the insulating cover (8) presses down the insulating sheet (2) and the insulating bracket (6) to press the insulating bracket (6) onto the base plate (7).

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