High-voltage relay

Abstract

The invention discloses a high-voltage relay, and relates to the technical field of relays, and the relay comprises an insulating cover which is provided with a mounting structure for accommodating two main static contacts, and each main static contact is provided with a contact end extending into the insulating cover and a leading-out end leading out of the insulating cover; the insulation support is fixed in the insulation cover, the insulation support is provided with a mounting port, the contact end is located at the mounting port, and the contact end and the mounting port have overlapped parts in the length direction and the width direction of the insulation support; the connecting plate is embedded in the insulating support between the two main static contacts, the upper surface of the connecting plate is not higher than the upper surface of the insulating support, and the two ends of the connecting plate in the width direction do not exceed the insulating support; the insulation sheet is arranged on the upper surface of the insulation support and located between the two installation openings, and the projection of the insulation sheet in the height direction falls into the insulation support. The internal space of the insulating cover can be fully utilized, the size of the relay is effectively reduced, and the compact structure is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of relays, and in particular to a high-voltage relay. Background Art

[0002] With the continuous increase in market demand, the products in the contactor industry are also constantly being innovated and replaced, and the requirements for relays are becoming higher and higher. Especially in some specific fields, not only the voltage requirements for relays are high, but also the size requirements are small.

[0003] Current relays usually have insulating parts arranged on the outside of the insulating cover. On the one hand, the insulating parts can achieve electrical isolation between the static contact lead ends, and on the other hand, they can be welded through the injection-molded integral parts for conduction. However, this method does not fully utilize the internal space of the insulating cover, resulting in a loose overall structure of the relay and poor compactness, which cannot adapt to the development trend of miniaturization of new energy equipment.

[0004] Therefore, in view of the above-mentioned defects, how to make the relay structure more compact and reduce the volume of the relay is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a high-voltage relay that can fully utilize the internal space of the insulating cover, effectively reduce the volume of the relay, and ensure a compact structure.

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

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

[0008] An insulating bracket is fixed in the insulating cover, the insulating bracket is provided with a mounting opening, the contact end is located in the mounting opening, and the two have overlapping portions in both the length direction and the width direction of the insulating bracket;

[0009] A connecting plate embedded in the insulating support between the two main static contacts, wherein the upper surface of the connecting plate is not higher than the upper surface of the insulating support, and the connecting plate does not exceed the insulating support at both ends in the width direction;

[0010] The insulating sheet is provided on the upper surface of the insulating bracket and is located between the two mounting openings. The projection of the insulating sheet in the height direction falls into the insulating bracket.

[0011] Optionally, the insulating bracket includes side brackets on both sides and a connecting bracket connecting the two side brackets, and the two side brackets are symmetrically arranged about the connecting bracket;

[0012] The mounting opening is provided on the side bracket, and the connecting frame is lower than the side bracket in the height direction to form a sinking groove for accommodating the connecting plate.

[0013] Optionally, the connecting frame does not extend beyond the side bracket and the connecting plate at both ends in the width direction.

[0014] Optionally, the connecting plate is provided with wiring terminals and micro switches at both ends in the width direction, and the micro switches and the wiring terminals have overlapping portions with the side brackets in the length direction.

[0015] Optionally, the wiring terminal passes through the connecting plate and is welded to the 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 wiring terminal;

[0016] The welding terminal and the micro switch are respectively located on both sides of the connecting frame in the width direction, and the welding terminal and the micro switch have overlapping portions with the connecting frame in the width direction.

[0017] Optionally, the projection of the main static contact in the height direction falls within the range of the insulating bracket, and an active contact and a follower arm that move in the height direction are provided in the insulating bracket. The active contact corresponds to the main static contact in the height direction, and the follower arm corresponds to the micro switch in the height direction.

[0018] Optionally, the insulating sheet includes:

[0019] a bridge, spanning above the connecting plate between the micro switch and the wiring terminal;

[0020] The extension arms are located on both sides of the bridge, and each of the extension arms extends circumferentially along the contact end.

[0021] Optionally, a positioning column is provided on the insulating bracket, and a positioning hole that cooperates with the positioning column is provided on the connecting plate to position the connecting plate.

[0022] Optionally, the insulating sheet is interference-fitted between the insulating cover and the insulating bracket, and the top wall of the insulating cover is spaced apart from the upper surface of the insulating bracket;

[0023] The upper surface of the connecting plate is spaced apart from the bridge frame, and the extending arm is interference fitted with the insulating cover and the insulating bracket.

[0024] Optionally, a bottom plate is further included, the insulating cover is fixedly connected to the bottom plate, and the top wall of the insulating cover presses down the insulating sheet and the insulating bracket to press the insulating bracket tightly onto the bottom plate.

[0025] The beneficial effect of the present application is that the present application arranges the insulating bracket, connecting plate and insulating sheet inside the insulating cover, making full use of the internal space of the insulating cover, improving the compactness of the structure and reducing the difficulty of assembly; at the same time, the insulating sheet is located between the contact ends of the two main static contacts, and together with the insulating bracket and the insulating cover, it forms a multiple insulation barrier, and its projection in the height direction falls completely within the range of the insulating bracket, forming a compact three-dimensional insulation system, avoiding the insulating sheet from occupying additional space in the width or length direction. The connecting plate is embedded in the insulating bracket and its width does not exceed the boundary of the insulating bracket, so that the connecting plate and the insulating bracket overlap in three-dimensional space, significantly reducing the volume. In addition, there is an overlapping part between the contact end of the main static contact and the mounting port in both the length and width directions. By accurately matching the outline dimensions of the contact end and the mounting port, the space occupied by the insulating bracket is minimized, so that the various components inside the insulating cover are reasonably arranged, and the compactness of the structure is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0027] Figure 1 A schematic diagram of the internal structure of the insulation cover provided in an embodiment of the present application;

[0028] Figure 2 An exploded view of the internal structure of the insulation cover provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the structure of the insulating sheet provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the matching structure of the insulating cover, insulating bracket and base plate provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the insulating bracket structure provided in an embodiment of the present application;

[0032] Figure 6 A cross-sectional view of the interior of the insulation cover provided in an embodiment of the present application;

[0033] Figure 7 for Figure 6 A in the middle is an enlarged structural diagram;

[0034] Figure 8 A partial cross-sectional view of the interior of the insulation cover provided in an embodiment of the present application from another perspective;

[0035] Figure 9 A schematic diagram of the side gap arrangement structure provided in an embodiment of the present application;

[0036] Figure 10 A schematic diagram of the transfer chamber arrangement structure provided in an embodiment of the present application;

[0037] Figure 11 Schematic diagram of the explosion structure of the insulation cover, insulation bracket and base plate provided in the embodiment of the present application;

[0038] Figure 12 A schematic diagram of the structure of the insulating cover and the magnetic circuit mechanism provided in an embodiment of the present application;

[0039] Figure 13 A cross-sectional view of the insulation cover and magnetic circuit mechanism provided in an embodiment of the present application.

[0040] In the figure: 1-main static contact; 2-insulating sheet; 3-terminal; 4-connecting plate; 5-micro switch; 6-insulating bracket; 7-bottom plate; 8-insulating cover; 9-adapter; 10-side gap; 11-bottom gap; 12-active contact; 13-follower arm; 14-magnet bracket; 15-magnet; 16-wire; 17-U-shaped yoke; 18-circuit board; 19-coil bracket; 20-coil; 21-magnet; 22-transmission rod;

[0041] 201-bridge; 202-extension arm;

[0042] 401-welding terminal;

[0043] 601-connecting frame; 602-side bracket; 603-sunk groove; 604-mounting port; 605-positioning column; 606-side opening; 607-first rib; 608-foot; 609-second rib;

[0044] 901-transfer chamber; 902-lower folding edge; 903-connecting edge; 904-upper folding edge; 905-opening;

[0045] 1401-wire segment; 1402-wire trough. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper," "lower," "front," and "back" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on 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.

[0048] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0049] Please refer to Figures 1 to 13 In this embodiment, a high-voltage relay is provided, including an insulating cover 8, an insulating bracket 6, a connecting plate 4, and an insulating sheet 2. The insulating cover 8 may be made of ceramic material and is provided with a mounting structure for accommodating two main static contacts 1. The mounting structure may be an assembly hole provided in the insulating cover 8, and the main static contacts 1 may be fixed in the assembly hole. The main static contacts 1 are arranged in groups of two, and at least one group of main static contacts 1 is provided on the insulating cover 8. The main static contacts 1 have contact terminals extending into the interior of the insulating cover 8 and lead terminals extending from the exterior of the insulating cover 8. An external circuit can be electrically connected to the main static contacts 1 via the lead terminals.

[0050] The insulating bracket 6 is fixedly mounted within the insulating cover 8. The insulating bracket 6 can be made of plastic and has a mounting opening 604 for accommodating the contact end of the main static contact 1. Specifically, the contact end of the main static contact 1 is located within the mounting opening 604, and the mounting opening 604 at least partially covers the contact end, so that the contact end and the mounting opening 604 overlap in both the length and width directions of the insulating bracket 6. By precisely matching the outline dimensions of the contact end and the mounting opening 604, the space occupied by the insulating bracket 6 is minimized. The length direction is the distribution direction of the two main static contacts 1 in the horizontal plane (X direction), the width direction is the direction perpendicular to the length direction in the horizontal plane (Y direction), and the height direction is the vertical direction perpendicular to the horizontal plane (Z direction).

[0051] The connecting plate 4 is embedded in the insulating bracket 6 between the two main static contacts 1, and the upper surface of the connecting plate 4 is not higher than the upper surface of the insulating bracket 6. At the same time, the two ends of the connecting plate 4 in the width direction do not exceed the insulating bracket 6, so that the connecting plate 4 and the insulating bracket 6 overlap in three-dimensional space, or in other words, the projections of the connecting plate 4 in the X direction, Y direction and Z direction all fall within the range of the insulating bracket 6, avoiding the connecting plate 4 occupying the space outside the insulating bracket 6 and significantly reducing the volume.

[0052] The insulating sheet 2 is arranged on the upper surface of the insulating bracket 6 and is located between the two mounting openings 604. On the one hand, the insulating sheet 2 can improve the electrical isolation effect of the two main static contacts 1. On the other hand, the projection of the insulating sheet 2 in the height direction falls into the insulating bracket 6, forming a compact three-dimensional insulation system, avoiding the insulating sheet 2 occupying additional space in the width or length direction.

[0053] It can be seen that the present application arranges the insulating bracket 6, the connecting plate 4 and the insulating sheet 2 inside the insulating cover 8, making full use of the internal space of the insulating cover 8, improving the compactness of the structure and reducing the difficulty of assembly; and reasonably arranges the insulating bracket 6, the connecting plate 4 and the insulating sheet 2 inside the insulating cover 8, so that the relay is as miniaturized as possible and can adapt to the development trend of miniaturization of new energy equipment.

[0054] The insulating bracket 6 includes two side brackets 602 and a connecting bracket 601 connecting the two side brackets 602. The two side brackets 602 are symmetrically arranged with respect to the connecting bracket 601. The mounting openings 604 are provided on the side brackets 602, and thus the two mounting openings 604 are also symmetrically arranged with respect to the connecting bracket 601. In some embodiments, the mounting openings 604 are arranged in a semicircular shape, with the semicircular structures of the two mounting openings 604 facing away from each other.

[0055] The connecting frame 601 is lower than the side bracket 602 in the height direction, thereby forming a sinking groove 603 for accommodating the connecting plate 4. The connecting plate 4 can be embedded in the sinking groove 603, and the upper surface of the connecting plate 4 is not higher than the upper surface of the insulating bracket 6, so that when the insulating sheet 2 is arranged, the insulating sheet 2 will not be affected by the connecting plate 4.

[0056] Furthermore, the two ends of the connecting frame 601 in the width direction do not exceed the side bracket 602 and the connecting plate 4, so that the connecting plate 4 has recessed grooves on both sides in the width direction, and on the basis that the connecting plate 4 does not exceed the insulating bracket 6 in the width direction, the two ends of the connecting plate 4 in the width direction can correspond to part of the recessed grooves.

[0057] On this basis, the connecting plate 4 is provided with connecting terminals 3 and micro switches 5 at both ends in the width direction, and the micro switches 5 and the connecting terminals 3 are at least partially located in the above-mentioned recessed grooves, so that the micro switches 5 and the connecting terminals 3 have overlapping parts with the side bracket 602 in the length direction, reducing the space occupied by the micro switches 5 and the connecting terminals outside the insulating bracket 6.

[0058] In which, the plate surface of the connecting plate 4 can be perpendicular to the main static contact 1, the main static contact 1 is arranged along the Z direction, and the distribution direction (Y direction) of the wiring terminal 3 and the micro switch 5 is perpendicular to the distribution direction (X direction) of the two main static contacts 1; that is, the connection line between the wiring terminal 3 and the micro switch 5 and the connection line between the two main static contacts 1 are distributed vertically in the horizontal plane.

[0059] In other words, the two main static contacts 1, the terminal 3 and the micro switch 5 are distributed in a "cross" shape, so that the four can be as far away from each other as possible in a limited space, thereby playing a role in high and low voltage insulation and improving the insulation effect of the four.

[0060] The wiring terminal 3 is disposed through the connecting plate 4. 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. The microswitch 5 is located on the lower surface of the connecting plate 4 and is electrically connected to the wiring terminal 3. It can be seen that the welding terminal 401 and the microswitch 5 are located on either side of the connecting frame 601 in the width direction, and both are located on the lower surface of the connecting plate 4. The welding terminal 401 and the microswitch 5 overlap with the connecting frame 601 in the width direction, which also avoids occupying the outer space of the insulating bracket 6.

[0061] In addition, the insulating sheet 2 is located between the upper surface of the insulating bracket 6 and the top wall of the insulating cover 8. The insulating sheet 2 includes a bridge 201 and an extension arm 202. The bridge 201 spans above the connecting plate 4 between the microswitch 5 and the terminal 3, further improving the insulation between the microswitch 5 and the terminal 3. At the same time, the extension arms 202 are located on both sides of the bridge 201. Each extension arm 202 extends circumferentially along the contact end of the main static contact 1, thereby increasing the insulation between the two main static contacts 1. It should be noted that after being extended to a certain length, the extension arm 202 can also extend between the main static contact 1 and the terminal 3, as well as between the main static contact 1 and the microswitch 5, thereby increasing the insulation between the main static contact 1 and the microswitch 5 and the terminal 3.

[0062] By adopting the above-mentioned method, the insulation performance between the main static contact 1 and the wiring terminal 3, the micro switch 5 and the connecting plate 4 can be improved, thereby ensuring the overall insulation performance of the relay.

[0063] An upper protrusion protruding from the upper surface of the insulating bracket 6 is provided on the upper edge of the mounting opening 604. 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 accurately positioning the insulating sheet 2 between the two main static contacts 1 and accurately positioning the extension arm 202 around the contact end of the main static 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 cylindrical, the corresponding upper protrusion and extension arm 202 are arranged in an arc shape, so that the inner wall of the extension arm 202 can stably abut against the outer wall of the upper protrusion, thereby achieving positioning of the insulating sheet 2.

[0064] Moreover, 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 respectively contact the upper surface of the insulating bracket 6 and the lower surface of the top wall of the insulating cover 8, thereby achieving further positioning of the insulating sheet 2 by extrusion.

[0065] Furthermore, the extension wall and the bridge frame 201 can be formed as one piece, and on the basis of the semicircular structure of the above-mentioned mounting opening 604 being arranged back to back, the extension arm 202 is in an arc or semicircular shape that is adapted to the mounting opening 604, so that the two extension arms 202 can be covered on the opposite surfaces of the contact end of the main static contact 1, thereby ensuring the insulation effect of the two main static contacts 1.

[0066] The insulating bracket 6 is also provided with a positioning post 605. Specifically, the positioning post 605 is disposed in the sunken groove 603. The connecting plate 4 is provided with a positioning hole that cooperates with the positioning post 605, ensuring that the connecting plate 4 is stably positioned on the insulating bracket 6. Furthermore, the height of the positioning post 605 is no greater than the depth of the sunken groove 603, so that the positioning post 605 does not affect the stable arrangement of the insulating sheet 2.

[0067] 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 , so that a remaining space is formed on the upper side of the connecting plate 4 in the sinking groove 603 .

[0068] Furthermore, the insulating sheet 2 is interference-fitted between the insulating cover 8 and the insulating bracket 6, achieving relative fixation between the insulating cover 8, the insulating sheet 2, and the insulating bracket 6. In other words, the insulating cover 8 and the insulating bracket 6 do not directly contact each other, but are instead transitionally assembled through the insulating sheet 2. This interference fit ensures that the insulating bracket 6 does not wobble and prevents the risk of air leakage during laser welding due to the insulating bracket 6 being too high.

[0069] However, a direct rigid connection between the top wall of the insulating cover 8 and the upper surface of the insulating bracket 6 is likely to cause air leakage. Therefore, the assembly method of the present application has a higher yield rate and a longer service life.

[0070] On this basis, the bridge 201 can be located above the sinking groove 603. At this time, the lower surface of the bridge 201 can be flush with the upper surface of the insulating bracket 6. However, due to the interference fit assembly method, during assembly, the top wall of the insulating cover 8 and the upper surface of the insulating bracket 6 can squeeze the extension arm 202, and the bridge 201 part is only subjected to the downward pressure of the insulating cover 8 due to the corresponding sinking groove 603 and the existence of the above-mentioned remaining space.

[0071] In some embodiments, the projection of the bridge 201 on the sunken groove 603 completely falls within the sunken groove 603. That is, the width of the bridge body is smaller than the width of the sunken groove 603, and the side of the bridge body is within the inner side of the sunken groove 603, ensuring that the bridge 201 can completely correspond to the sunken groove 603. At the same time, the bridge 201 does not affect the arrangement of the terminal blocks 3 and micro switches 5 on both sides of the connecting plate 4, thereby improving the overall stability and insulation of the relay.

[0072] The projection of the main static contact 1 in the height direction falls within the range of the insulating bracket 6. An active contact 12 and a follower arm 13 that move in the height direction are provided in the insulating bracket 6. The active contact 12 corresponds to the main static contact 1 in the height direction, and the follower arm 13 corresponds to the micro switch 5 in the height direction, so that the main static contact 1, the active contact 12 and the follower arm 13 all fall within the range of the insulating bracket 6, thereby not occupying additional space outside the insulating bracket 6, which is conducive to the compactness and miniaturization of the relay structure.

[0073] The relay also includes a base plate 7 , and an insulating cover 8 can be welded to the base plate 7 through an adapter 9 , 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 .

[0074] In some embodiments, the insulating bracket 6 is hollow inside and has side openings 606 defined on its sidewalls. Specifically, side openings 606 are defined on the widthwise sidewalls of the two side brackets 602, exposing the internal components of the insulating bracket 6 through the side openings 606. It should be noted that the bottom of the side openings 606 does not reach the bottom of the side bracket 602, resulting in sidewalls of a certain height below the side openings 606.

[0075] On this basis, a side gap 10 is provided between the side wall below the side opening 606 and the inner wall of the insulating cover 8, and the side gap 10 is connected to the side opening 606, so that the arc inside the insulating bracket 6 can be led into the side gap 10 through the side opening 606 (such as Figure 6 The arc is extinguished by following the arc striking path a) in the figure.

[0076] Furthermore, the side gap 10 extends to the bottom of the side bracket 602, and the bottom of the side bracket 602 cooperates with the bottom plate 7, and there is a bottom gap 11 between the bottom surface of the side bracket 602 and the upper surface of the bottom plate 7. The bottom gap 11 is connected to the inside of the insulating bracket 6, so that the arc inside the insulating bracket 6 can be guided to the bottom gap 11 (such as Figure 6 On this basis, the adapter 9 surrounds the bottom of the insulating bracket 6 and has a transition chamber 901 that communicates with the side gap 10 and the bottom gap 11. This allows the arc in the side gap 10 and the bottom gap 11 to enter the transition chamber 901 and achieve arc extinguishing in the transition chamber 901.

[0077] In addition, the side gap 10 is connected to the side opening 606, forming a channel for the lateral diffusion of the arc. When the contacts are disconnected and an arc is generated, high-temperature gas can enter the side gap 10 through the side opening 606, thereby preventing the arc energy from accumulating near the contact. This design forces the arc to expand along a preset path, accelerating the arc elongation and cooling. Similarly, the bottom gap 11 allows the high-pressure gas generated by the arc to be discharged downward, preventing a sudden increase in gas pressure from causing the arc to reignite; the transition chamber 901 surrounds the bottom of the insulating bracket 6, connecting the side gap 10 and the bottom gap 11, forming an integrated gas buffer space, which merges and dilutes the arc gas that diffuses laterally with the vertically downward airflow in the transition chamber 901, thereby avoiding local pressure concentration.

[0078] Among them, the adapter 9 is fixedly arranged on the base plate 7, and the adapter chamber 901 is isolated from the outside air, that is, the adapter chamber 901 is connected with the interior of the insulating cover 8 and the interior of the insulating bracket 6 only through the side gap 10 and the bottom gap 11, thereby preventing external impurities from entering the adapter chamber 901, reducing the insulation strength of the gas medium in the adapter chamber 901, and increasing the risk of arc reignition.

[0079] The insulating cover 8 is fixed on the adapter 9, which serves as the intermediate support layer between the insulating cover 8 and the base plate 7, and evenly transfers mechanical loads (such as vibration and impact) to the base plate 7, thereby preventing the insulating cover 8 from being directly deformed by force, significantly improving the overall anti-deformation ability, and ensuring the geometric stability of the contact working space.

[0080] The adapter 9 includes a lower folded edge 902, a connecting edge 903, and an upper folded edge 904. The lower folded edge 902 can be welded to the base plate 7, providing a stable support base and evenly distributing the pressure between the insulating cover 8 and the adapter 9 to the base plate 7. The connecting edge 903 is formed by bending the lower folded edge 902 upward, forming a rigid support frame. Its height can be flexibly adapted to insulating brackets 6 of different sizes. At the same time, it provides longitudinal expansion space for the adapter chamber 901, ensuring that the volume of the adapter chamber 901 can be expanded and ensuring arc cooling efficiency.

[0081] The upper folded edge 904 is formed by bending the connecting edge 903 toward the insulating support 6, and the upper folded edge 904 extends toward the insulating support 6 and is spaced apart from it, thereby forming a through opening 905 connecting the side gap 10 and the transition chamber 901, so that the high-temperature arc can be led into the transition chamber 901.

[0082] Furthermore, the bottom surface of the insulating cover 8 can be fixedly connected to the upper folded edge 904 via a welding piece, thereby achieving stable fixation of the insulating cover 8.

[0083] After the adapter 9 is fixed to the bottom plate 7 and the insulating cover 8 by welding, an annular adapter chamber 901 of a certain width and thickness can be formed between the adapter 9 and the insulating support 6 .

[0084] The insulating bracket 6 has a side bracket 602 with a side opening 606 and a first rib 607 provided on the side bracket 602. The first rib 607 protrudes from the side wall of the side bracket 602, so that after the insulating cover 8 and the insulating bracket 6 are assembled, the first rib 607 abuts against the inner wall of the insulating cover 8 to form a side gap 10 between the inner wall of the insulating cover 8 and the outer wall of the insulating bracket 6.

[0085] A protruding foot 608 is provided on the bottom surface of the insulating bracket, and the foot 608 abuts against the bottom plate to form a bottom gap.

[0086] In addition, the side bracket 602 is provided with a second rib 609 on the side wall in the length direction. The second rib 609 abuts against the inner wall of the insulating cover 8 to form a side gap 10, so that the side gap 10 surrounds the outer periphery of the insulating bracket 6, and the annular side gap 10 can be connected to the annular transfer chamber 901.

[0087] In addition, since the first rib 607 is located on the lower side of the insulating bracket 6, in order to ensure the abutment stability between the insulating bracket 6 and the insulating cover 8, the height of the second rib 609 is higher than the first rib 607, so that the insulating bracket 6 abuts against the inner wall of the insulating cover 8 at different heights, thereby improving the stability of the insulating bracket 6 in the insulating cover 8.

[0088] In some embodiments, the bottom surfaces around the insulating bracket 6 form a bottom gap 11 with the bottom plate 7. It can be seen that the annular bottom gap 11 and the annular side gap 10 can be adapted to the annular transition chamber 901, so that when an arc is generated, the arc can be led into the transition chamber 901 around the insulating bracket 6.

[0089] The annular side gap 10 can be separated by ribs on multiple insulating brackets 6, thereby forming multiple independent side gaps 10, blocking the continuous development of the arc along the annular path, and significantly improving the electrical performance and reliability of the high-voltage relay through physical isolation and structural optimization.

[0090] In some embodiments, the width of the side gap 10 is smaller than the width of the transition chamber 901, that is, the high-temperature arc can be confined in the narrow gap of the side gap 10, and after entering the transition chamber 901, the heat dissipation volume is increased, forming a gas expansion buffer layer, realizing the attenuation of circuit energy, and improving the arc extinguishing effect.

[0091] A magnetic steel bracket 14 is provided on the outside of the insulating cover 8. A magnet 15 is sandwiched between the magnetic steel bracket 14 and the side wall of the insulating cover 8. The magnetic steel bracket 14 and the magnet 15 are distributed on both sides of the insulating cover 8. The two magnetic steel brackets 14 extend toward the centerline of the insulating cover 8, forming a wire segment 1401 at the centerline of the insulating cover 8, away from the insulating cover 8. A wire groove 1402 is formed between the wire segment 1401 and the insulating cover 8. The wire 16 of the terminal block 3 passes through the wire groove 1402 and is led to the magnetic circuit mechanism on the underside of the insulating cover 8, where it is electrically connected to the circuit board 18 of the magnetic circuit mechanism.

[0092] Specifically, the magnetic circuit mechanism is located on the lower side of the insulating cover 8, and a shell is provided on the outer periphery of the magnetic circuit mechanism and the magnetic steel bracket 14. The top wall of the shell corresponds to the top wall of the insulating cover 8, and the side wall of the shell corresponds to the magnetic steel bracket 14 and the magnetic circuit mechanism. A base is provided at the bottom of the shell, and under the limiting action of the shell and the base, the insulating cover 8 and the magnetic circuit mechanism can be stably limited in the cavity structure; specifically, the top wall of the shell and the base cooperate to limit the insulating cover 8 and the magnetic circuit mechanism in the vertical direction, and the side wall of the shell 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.

[0093] Furthermore, the magnetic circuit mechanism includes a stator assembly and a movable assembly extending into the insulating cover 8. The movable assembly is connected to an active contact 12 and a follower arm 13. The active contact 12 and the follower arm 13 are both located in the insulating bracket 6. The movable assembly moves under the drive of the stator assembly, thereby driving the active contact 12 and the follower arm 13 to move, thereby realizing electrical conduction of the main static contact 1. The follower arm 13 can correspond to the micro switch 5, so that the micro switch 5 can electrically conduct the two terminal blocks 3.

[0094] Among them, the movable component can be a transmission device including a magnet 21, and the stator component is a driving device including a coil 20. The coil 20 generates a magnetic field when powered, and the magnet 21 can drive the transmission device to move under the action of the magnetic field, thereby moving the active contact 12 and the follower arm 13.

[0095] Specifically, the stator assembly includes a U-shaped yoke 17, a coil bracket 19 and a coil 20. The U-shaped yoke 17 is fixed to the base, and the coil bracket 19 is located in the U-shaped structure of the U-shaped yoke 17. An axial cavity for movement of the stator assembly is provided in the middle of the coil bracket 19; the coil 20 is sleeved on the coil bracket 19 on the outer periphery of the axial cavity, and is used to generate a magnetic field that drives the magnet 21 to move axially.

[0096] The mover assembly includes a magnet 21, a transmission rod 22, and a lifting bracket. The magnet 21 is located in the axial cavity. One end of the transmission rod 22 is connected to the magnet 21, and the other end passes through the base plate 7 and extends into the insulating cover 8 and the insulating bracket 6. A lifting bracket is provided at the end, and the active contact 12 and the follower arm 13 are provided on the lifting bracket; the magnet 21 moves toward the insulating cover 8 in the magnetic field generated by the coil 20, thereby driving the transmission rod 22 to move toward the main static contact 1 (micro switch 5), and then the transmission rod 22 pushes the active contact 12 (follower arm 13) on the lifting bracket to move toward the main static contact 1 (micro switch 5), thereby realizing electrical conduction of the main static contact 1 and electrical conduction of the terminal 3.

[0097] Considering that the active contact 12 should be separated from the main static contact 1 after the magnetic field generated by the coil 20 disappears, an elastic member can be sleeved on the outer periphery of the transmission rod 22, and the elastic force of the elastic member can be used to reset the transmission rod 22 and the magnet 21, so that the active contact 12 and the follower arm 13 are ready for the next action.

[0098] Among them, the circuit board 18 can be set in the U-shaped yoke 17 to utilize the internal space of the U-shaped yoke 17 to avoid the circuit board 18 occupying additional space. The coil 20 and the wire 16 can be led out of the shell through the circuit board 18 to realize the connection between the coil 20 and the wire 16 and the external circuit.

[0099] In some embodiments, the height of the magnet 15 is lower than the upper surface of the magnetic support 14, and the height of the magnetic support 14 is higher than the upper surface of the insulating cover 8, thereby forming a glue groove; during assembly, after the terminal 3 is connected, glue is dispensed on the upper surface of the terminal 3 and the insulating cover 8, and the shell is installed after gluing. The glue covers the upper surface of the insulating cover 8 under the extrusion of the shell, thereby achieving effective insulation between the lead-out ends of the main static contacts 1, as well as effective insulation between the terminal 3 and between the terminal 3 and the lead-out end of the main static contact 1.

[0100] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0101] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A high voltage relay, characterized in that: include: An insulating cover (8) is provided with a mounting structure for accommodating two main static contacts (1), wherein the main static contacts (1) have contact ends extending into the interior of the insulating cover (8) and lead ends extending out of the exterior of the insulating cover (8); An insulating bracket (6) is fixed in the insulating cover (8), the insulating bracket (6) is provided with a mounting opening (604), the contact end is located at the mounting opening (604), and the two have overlapping portions in both the length direction and the width direction of the insulating bracket (6); A connecting plate (4) is embedded in the insulating support (6) between the two main static contacts (1), wherein the upper surface of the connecting plate (4) is not higher than the upper surface of the insulating support (6), and the two ends of the connecting plate (4) in the width direction do not exceed the insulating support (6); An insulating sheet (2) is provided on the upper surface of the insulating bracket (6) and is located between the two mounting openings (604), and a projection of the insulating sheet (2) in the height direction falls within the insulating bracket (6).

2. The high voltage relay according to claim 1, characterized in that: The insulating bracket (6) comprises side brackets (602) on both sides and a connecting bracket (601) connecting the two side brackets (602), and the two side brackets (602) are symmetrically arranged with respect to the connecting bracket (601); The mounting opening (604) is provided on the side bracket (602), and the connecting frame (601) is lower than the side bracket (602) in the height direction to form a sinking groove (603) for accommodating the connecting plate (4).

3. The high voltage relay according to claim 2, characterized in that: The connecting frame (601) does not extend beyond the side bracket (602) and the connecting plate (4) at both ends in the width direction.

4. The high voltage relay according to claim 3, characterized in that: The connecting plate (4) is provided with connection terminals (3) and micro switches (5) at both ends in the width direction, and the micro switches (5) and the connection terminals (3) have overlapping portions with the side bracket (602) in the length direction.

5. The high voltage relay according to claim 4, characterized in that: The wiring terminal (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 wiring terminal (3); The welding terminal (401) and the micro switch (5) are respectively located on both sides of the connecting frame (601) in the width direction, and the welding terminal (401) and the micro switch (5) have overlapping portions with the connecting frame (601) in the width direction.

6. The high voltage relay according to claim 4, characterized in that: The projection of the main static contact (1) in the height direction falls within the range of the insulating bracket (6), and an active contact (12) and a follower arm (13) that move in the height direction are provided in the insulating bracket (6). The active contact (12) corresponds to the main static contact (1) in the height direction, and the follower arm (13) corresponds to the micro switch (5) in the height direction.

7. The high voltage relay according to claim 4, characterized in that: The insulating sheet (2) comprises: A bridge (201) spanning above the connecting plate (4) between the micro switch (5) and the wiring terminal (3); The extension arms (202) are located on both sides of the bridge (201), and each of the extension arms (202) extends circumferentially along the contact end.

8. The high voltage relay according to claim 7, characterized in that: A positioning column (605) is provided on the insulating bracket (6), and a positioning hole cooperating with the positioning column (605) is provided on the connecting plate (4) to position the connecting plate (4).

9. The high voltage relay according to claim 7, characterized in that: The insulating sheet (2) is interference-fitted between the insulating cover (8) and the insulating bracket (6), and the top wall of the insulating cover (8) is spaced apart from the upper surface of the insulating bracket (6); The upper surface of the connecting plate (4) is spaced apart from the bridge frame (201), and the extension arm (202) is interference-fitted with the insulating cover (8) and the insulating bracket (6).

10. The high voltage relay according to claim 1, characterized in that: It also includes a bottom plate (7), the insulating cover (8) is fixedly connected to the bottom 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 bottom plate (7).

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