High-voltage direct-current relay

Abstract

The invention discloses a high-voltage direct-current relay which comprises a pair of static contact leading-out ends, a push rod assembly, a plurality of movable spring assemblies, a magnetic conductive assembly and an elastic assembly. Each movable spring assembly comprises a movable contact spring, the movable contact springs are arranged side by side, and the two ends of each movable contact spring in the first direction are used for making contact with or being separated from the corresponding pair of static contact leading-out ends respectively; wherein the first direction is the arrangement direction of the pair of static contact leading-out ends; the magnetic conductive assembly is arranged on one side, facing the static contact leading-out end, of the plurality of movable reeds and is used for resisting electric repulsive force between the contacts; the elastic assembly is connected to the plurality of movable spring assemblies and the push rod assembly, and the elastic assembly is used for providing contact pressure.

Description

Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] As one type of relay, a high-voltage DC relay includes a pair of static contact terminals, a moving spring assembly, an elastic member and a push rod assembly. The moving spring assembly is installed on the push rod assembly through the elastic member. The movement of the push rod assembly drives the moving spring assembly to move, thereby achieving contact or separation between the moving spring assembly and the pair of static contact terminals.

[0004] However, the movable spring assembly in the prior art and a pair of static contact lead-out terminals only form two contact points, resulting in large electric repulsion and contact resistance between the contacts, which is not conducive to improving the short-circuit resistance of the relay and affects the reliability of the relay. Summary of the invention

[0005] The embodiment of the present application provides a high-voltage DC relay to solve the problems of large electric repulsion between contacts and large contact resistance existing in the prior art.

[0006] The high voltage DC relay of the embodiment of the present application comprises:

[0007] A pair of static contact terminals;

[0008] a push rod assembly; and

[0009] A plurality of dynamic spring assemblies, each of which comprises a dynamic spring sheet, and two ends of each dynamic spring sheet along a first direction are respectively used to contact or separate with a pair of static contact lead-out terminals; wherein the first direction is the arrangement direction of the pair of static contact lead-out terminals;

[0010] A magnetic conductive component, disposed on one side of the plurality of movable springs facing the lead-out ends of the static contacts, for resisting the electromotive repulsive force between the contacts; and

[0011] The elastic component is connected to the plurality of dynamic spring components and the push rod component, and the elastic component is used for providing contact pressure.

[0012] According to some embodiments of the present application, the magnetic conductive component includes a first magnetic conductive body, which is arranged on a side of the plurality of movable reed pieces facing the static contact lead-out ends and spans across the plurality of movable reed pieces.

[0013] According to some embodiments of the present application, each dynamic spring assembly also includes a second magnetic conductor, which is fixedly connected to the side of the dynamic spring piece facing away from the static contact lead-out end, and the multiple second magnetic conductors of the multiple dynamic spring assemblies are used to form magnetic circuits with the magnetic conductor assemblies respectively.

[0014] According to some embodiments of the present application, the magnetic conductive component includes a plurality of first magnetic conductive bodies, the plurality of first magnetic conductive bodies correspond to the number of the plurality of movable spring pieces, and the plurality of first magnetic conductive bodies are respectively located on one side of the plurality of movable spring pieces facing the lead-out end of the static contact, and the first magnetic conductive bodies and the second magnetic conductive bodies on both sides of one movable spring piece are used to form a magnetic conductive circuit.

[0015] According to some embodiments of the present application, each of the first magnetic conductors includes a top and two side portions, the top portion is located on a side of the movable reed piece facing the static contact lead-out end, the two side portions are respectively connected to two sides of the top portion along a third direction, and extend from the top portion in a direction away from the static contact lead-out end; the two side portions of the first magnetic conductor are respectively located on two sides of the same movable reed piece along the third direction;

[0016] The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0017] According to some embodiments of the present application, two adjacent first magnetic conductors are connected to form an integral structure through the two side portions; or, two adjacent first magnetic conductors are separate structures.

[0018] According to some embodiments of the present application, the elastic component is an elastic member, the elastic member is directly connected to the plurality of dynamic spring assemblies and the push rod assembly, and the elastic member is used to provide contact pressure.

[0019] According to some embodiments of the present application, the elastic member is a compression spring, one axial end of the compression spring abuts against the plurality of dynamic spring assemblies, and the other axial end of the compression spring abuts against the push rod assembly.

[0020] According to some embodiments of the present application, each of the dynamic spring assemblies has a first limiting portion, and one axial end of the compression spring is limitedly matched with a plurality of the first limiting portions;

[0021] The push rod assembly has a second limiting portion, and the other axial end of the compression spring is limitedly matched with the second limiting portion.

[0022] According to some embodiments of the present application, the elastic member is a leaf spring, and the leaf spring is directly connected to the push rod assembly and the plurality of dynamic spring assemblies.

[0023] According to some embodiments of the present application, the leaf spring includes a base and a spring arm, and at least one spring arm is respectively provided on both sides of the base along the first direction;

[0024] The base is connected to the push rod assembly, and the spring arms on both sides of the base are respectively abutted against two ends of a plurality of the movable spring assemblies.

[0025] According to some embodiments of the present application, the base is provided with a plurality of spring arms arranged side by side along a third direction on both sides along the first direction;

[0026] The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0027] According to some embodiments of the present application, the elastic component is a plurality of elastic members, the number of the plurality of elastic members corresponds to the number of the plurality of dynamic spring assemblies, and each of the elastic members is used to provide contact pressure to the corresponding dynamic spring assembly.

[0028] According to some embodiments of the present application, each of the elastic members is a compression spring, one axial end of the plurality of compression springs is respectively abutted against the push rod assembly, and the other axial ends of the plurality of compression springs are respectively abutted against the plurality of dynamic spring assemblies.

[0029] According to some embodiments of the present application, each of the elastic members is a leaf spring, and the plurality of leaf springs are all positionally connected to the push rod assembly and are respectively in contact with the plurality of dynamic spring assemblies.

[0030] According to some embodiments of the present application, the magnetic conductive component is disposed between a pair of static contact lead-out terminals.

[0031] According to some embodiments of the present application, a plurality of the movable reeds are arranged side by side along a third direction;

[0032] The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0033] One embodiment of the above application has at least the following advantages or beneficial effects:

[0034] In the high-voltage DC relay of the embodiment of the present application, the elastic component is connected to the push rod component and the multiple dynamic spring components, and the elastic component flexibly supports the multiple dynamic spring components to provide contact pressure. When the static contact surface of the static contact lead-out terminal is uneven, the multiple dynamic spring components can better match the static contact surface, so that the multiple dynamic spring components form a flexible contact with the static contact lead-out terminal, ensuring that the number of contact points formed by the multiple dynamic spring components and each static contact lead-out terminal is greater than or equal to two. After the two ends of the multiple dynamic spring components are in contact with a pair of static contact lead-out terminals, a reliable parallel circuit is formed, achieving a shunting effect. According to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force between each contact is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0035] Furthermore, since the magnitude of the electric repulsive force between each contact is significantly reduced, a smaller magnetic conductive component can be used to resist the same magnitude of short-circuit current, thereby reducing the space occupied by the anti-short-circuit structure, which is conducive to the miniaturization of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of an exploded view of a high-voltage DC relay according to an exemplary embodiment of the present application.

[0037] Figure 2 It is a schematic diagram of an exploded view of a high-voltage DC relay according to an exemplary embodiment of the present application, in which a housing, an arc extinguishing unit and a coil unit are omitted.

[0038] Figure 3 yes Figure 1 Sectional view of AA.

[0039] Figure 4 is an exploded schematic diagram of a high-voltage DC relay according to another exemplary embodiment of the present application, in which a housing, an arc extinguishing unit and a coil unit are omitted.

[0040] Figure 5 is an exploded schematic diagram of a high-voltage DC relay according to another exemplary embodiment of the present application, in which a housing, an arc extinguishing unit and a coil unit are omitted.

[0041] Figure 6 is a schematic exploded view of a moving component of a high-voltage DC relay according to a fourth exemplary embodiment of the present application.

[0042] Figure 7 is an exploded schematic diagram of a moving component of a high-voltage DC relay according to a fifth exemplary embodiment of the present application.

[0043] Figure 8It is a schematic diagram of an exploded view of a moving component of a high-voltage DC relay according to a sixth exemplary embodiment of the present application.

[0044] Figures 9 to 12 Schematic diagrams showing first magnetic conductors and second magnetic conductors of different shapes respectively.

[0045] Fig.13 is a schematic diagram showing that a first magnetic conductor includes a top and two side portions according to an exemplary embodiment of the present application.

[0046] The reference numerals are described as follows:

[0047] 1. High voltage DC relay

[0048] 10. Shell

[0049] 11. First shell

[0050] 11a. Exposure hole

[0051] 12. Second shell

[0052] 20. Coil unit

[0053] 21. Coil frame

[0054] 22. Coil

[0055] 30. Arc extinguishing unit

[0056] 31. Arc extinguishing magnet

[0057] 32. Yoke clamp

[0058] 40. Sealing unit

[0059] 1000. Contact container

[0060] 1001. Contact Chamber

[0061] 1002. First through hole

[0062] 1100, Insulation cover

[0063] 1110, Ceramic cover

[0064] 1111, third through hole

[0065] 1120, frame

[0066] 1200, Yoke Iron Plate

[0067] 1210, second through hole

[0068] 2000, static contact terminal

[0069] 3000, dynamic components

[0070] 3100、Dynamic spring assembly

[0071] 3110, moving reed

[0072] 3200, Push rod assembly

[0073] 3210, Push rod

[0074] 3211, base

[0075] 3212, Rod

[0076] 3213, Card

[0077] 3220, contact bracket

[0078] 3221, top wall

[0079] 3222, side wall

[0080] 3223, card hole

[0081] 3230, second limiter

[0082] 3240, limit protrusion

[0083] 3300, Elastic Components

[0084] 4000, Magnetic Circuit

[0085] 4300, static iron core

[0086] 4310, through hole

[0087] 4400, Moving Iron Core

[0088] 4500, reset parts

[0089] 5000, Metal Cover

[0090] 6000, magnetic components

[0091] 6100, first magnetic conductor

[0092] 6110, Top

[0093] 6120, side

[0094] 6200, second magnetic conductor

[0095] 6210, first limiter

[0096] 6300、Connectors

[0097] 100. Compression spring

[0098] 200. Leaf spring

[0099] 210, base

[0100] 211, limit hole

[0101] 220, Spring Arm DETAILED DESCRIPTION

[0102] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0103] like Figure 1 As shown, the high-voltage DC relay 1 of the embodiment of the present application includes a housing 10, a coil unit 20, an arc extinguishing unit 30 and a sealing unit 40. The sealing unit 40 is arranged in the housing 10, and the top of the static contact lead-out end of the sealing unit 40 is exposed to the outer surface of the housing 10 through the exposure hole 11a of the housing 10. The coil unit 20 and the arc extinguishing unit 30 are both arranged in the housing 10.

[0104] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0105] As an example, the housing 10 includes a first shell 11 and a second shell 12, which are connected to form a chamber for accommodating the coil unit 20, the arc extinguishing unit 30 and the sealing unit 40. In the embodiment of the present application, the exposure hole 11a is provided in the first shell 11.

[0106] The arc extinguishing unit 30 is used to extinguish the arc generated between the static contact lead-out end of the sealing unit 40 and the moving reed.

[0107] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 may be permanent magnets, and each arc extinguishing magnet 31 may be substantially rectangular. The two arc extinguishing magnets 31 are respectively arranged on both sides of the sealing unit 40 and are arranged opposite to each other along the length direction of the moving spring piece.

[0108] By providing two arc extinguishing magnets 31 arranged opposite to each other, a magnetic field can be formed around the static contact lead-out terminal and the movable reed piece. Therefore, the arc generated between the static contact lead-out terminal and the movable reed piece will be elongated in a direction away from each other by the effect of the magnetic field, thereby achieving arc extinguishing.

[0109] The arc extinguishing unit 30 also includes two yoke iron clamps 32, and the two yoke iron clamps 32 are arranged corresponding to the positions of the two arc extinguishing magnets 31. In addition, the two yoke iron clamps 32 surround the sealing unit 40 and the two arc extinguishing magnets 31. By designing that the yoke iron clamps 32 surround the arc extinguishing magnets 31, it is possible to prevent the magnetic field generated by the arc extinguishing magnets 31 from diffusing outward and affecting the arc extinguishing effect. The yoke iron clamps 32 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0110] like Figure 2 and Figure 3 As shown, the sealing unit 40 includes a contact container 1000 , a pair of stationary contact lead terminals 2000 , a moving assembly 3000 and a magnetic circuit portion 4000 .

[0111] It should be noted that the contact container 1000 is a stationary component, which is used to accommodate the contact group and is mainly a housing and has a chamber. In addition, the contact container 1000 can be formed by connecting multiple components in a predetermined assembly manner.

[0112] The contact container 1000 has a contact chamber 1001 therein. The contact container 1000 may include an insulating cover 1100 and a yoke plate 1200 . The insulating cover 1100 is disposed on one side surface of the yoke plate 1200 . The insulating cover 1100 and the yoke plate 1200 together enclose the contact chamber 1001 .

[0113] The insulating cover 1100 includes a ceramic cover 1110 and a frame piece 1120. The ceramic cover 1110 is connected to the yoke iron plate 1200 through the frame piece 1120. The frame piece 1120 can be a metal piece with an annular structure, such as an iron-nickel alloy, and one end of the frame piece 1120 is connected to the opening edge of the ceramic cover 1110, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 1120 is connected to the yoke iron plate 1200, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 1120 is arranged between the ceramic cover 1110 and the yoke iron plate 1200 to facilitate the connection between the ceramic cover 1110 and the yoke iron plate 1200.

[0114] The contact container 1000 also has a pair of first through holes 1002, and the first through holes 1002 are connected to the contact chamber 1001. The first through holes 1002 are used for the static contact lead-out terminal 2000 to pass through. In the embodiment of the present application, the first through holes 1002 are opened on the ceramic cover 1110.

[0115] A pair of static contact lead-out terminals 2000 are connected to the ceramic cover 1110 of the contact container 1000, and at least a portion of each static contact lead-out terminal 2000 is located in the contact chamber 1001. One of the pair of static contact lead-out terminals 2000 serves as a terminal for current inflow, and the other serves as a terminal for current outflow.

[0116] A pair of static contact lead-out terminals 2000 are disposed in a pair of first through holes 1002 in a one-to-one correspondence, and are connected to the ceramic cover 1110 , for example, by welding.

[0117] The bottom of the static contact lead-out terminal 2000 serves as a static contact, and the static contact may be integrally or separately arranged at the bottom of the static contact lead-out terminal 2000 .

[0118] Please continue reading Figure 2 and Figure 3 The movable assembly 3000 includes a plurality of movable spring assemblies 3100, a push rod assembly 3200 and an elastic assembly 3300 arranged side by side. The plurality of movable spring assemblies 3100 are arranged in the insulating cover 1100, and the two ends of the plurality of movable spring assemblies 3100 along the first direction D1 are used to contact or separate with a pair of static contact lead-out terminals 2000 respectively. Among them, the first direction D1 is the arrangement direction of the pair of static contact lead-out terminals 2000. It can be understood that the plurality of movable spring assemblies 3100 are arranged side by side, so the number of contact points formed by the plurality of movable spring assemblies 3100 and each static contact lead-out terminal 2000 is multiple, such as two, three, four, etc.

[0119] It should be noted that, if a pair of static contact lead terminals 2000 and a plurality of dynamic spring assemblies 3100 are regarded as a set of combinations, then the relay of the embodiment of the present application may include multiple sets of combinations.

[0120] Each dynamic spring assembly 3100 includes a dynamic spring piece 3110, and the two ends of the multiple dynamic spring pieces 3110 of the multiple dynamic spring assemblies 3100 along the first direction D1 are respectively used to contact or separate with a pair of static contact lead-out terminals 2000. The dynamic spring piece 3110 may include a dynamic spring body and dynamic contacts disposed at both ends of the dynamic spring body. The dynamic contact may be a separate part and connected to the dynamic spring body. Of course, the dynamic contact may also be integrally formed on the dynamic spring body.

[0121] The dynamic spring assembly 3100 further includes a second magnetic conductor 6200, which is fixedly connected to the side of the dynamic spring piece 3110 facing away from the static contact lead-out end 2000. The elastic assembly 3300 is in direct contact with the plurality of second magnetic conductors 6200. The function of the second magnetic conductor 6200 will be described in detail below.

[0122] In the embodiment of the present application, the moving assembly 3000 includes two moving spring assemblies 3100 arranged side by side. One end of the two moving spring assemblies 3100 is used to contact or separate with the static contact of one of the static contact lead-out terminals 2000, and the other end of the two moving spring assemblies 3100 is used to contact or separate with the static contact of the other static contact lead-out terminal 2000. Further, one end of the two moving spring assemblies 3100 forms two contact points with one of the static contact lead-out terminals 2000, and the other end of the two moving spring assemblies 3100 forms two contact points with the other static contact lead-out terminal 2000.

[0123] In other embodiments, the number of the dynamic spring assemblies 3100 can also be three, four, five, etc.

[0124] It is understandable that the moving assembly 3000 includes a plurality of moving spring assemblies 3100, and each moving spring assembly 3100 includes a moving spring piece 3110. The two ends of the plurality of moving spring pieces 3110 are respectively in contact with or separated from a pair of static contact lead-out terminals. Since the plurality of moving spring pieces 3110 will not restrict each other, the two ends of the plurality of moving spring pieces 3110 are respectively in contact with a pair of static contact lead-out terminals 2000 to form a reliable parallel circuit. The number of contact points formed by the plurality of moving spring pieces 3110 and a static contact lead-out terminal 2000 is greater than or equal to two, achieving a shunting effect. In addition, according to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force between each contact is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0125] like Figure 2 and Figure 3 As shown, the movement direction of the moving spring piece 3110 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210 and a contact bracket 3220. The contact bracket 3220 includes a top wall 3221 and two side walls 3222, and the two side walls 3222 are respectively connected to the two side edges of the top wall 3221 along the third direction D3, that is, the contact bracket 3220 forms an inverted U-shaped structure. A plurality of moving spring assemblies 3100 are installed in the contact bracket 3220 through an elastic assembly 3300. The upper end of the push rod 3210 is connected to the bottom ends of the two side walls 3222 of the contact bracket 3220.

[0126] A clamping hole 3223 is provided at the bottom end of each side wall 3222 of the contact support 3220. The push rod 3210 includes a base 3211 and a rod portion 3212, and the base 3211 is connected to one axial end of the rod portion 3212. Clamps 3213 are provided on both sides of the base 3211, and the two clamps 3213 are respectively clamped into the two clamping holes 3223 of the contact support 3220, so as to fix the base 3211 and the contact support 3220. The elastic component 3300 is provided between the plurality of dynamic spring components 3100 and the base 3211, and is used to apply elastic force to the plurality of dynamic spring components 3100 to move toward the top wall 3221, so as to provide contact pressure. The plurality of dynamic spring components 3100 are provided in a space enclosed by the contact support 3220 and the base 3211.

[0127] In other embodiments, the contact holder 3220 may also be other structures, which are not listed here one by one.

[0128] It can be understood that the elastic component 3300 can be used to flexibly support multiple dynamic spring components 3100 to provide contact pressure.

[0129] The plurality of movable spring pieces 3110 are arranged side by side along the third direction D3.

[0130] See also Figure 2 and Figure 3 The yoke plate 1200 has a second through hole 1210, which penetrates two opposite sides of the yoke plate 1200 along the thickness direction of the yoke plate 1200, and the second through hole 1210 is connected to the contact chamber 1001 of the contact container 1000. The rod portion 3212 is movably disposed in the second through hole 1210 along the axial direction. The base 3211 at one axial end of the rod portion 3212 is disposed in the contact chamber 1001.

[0131] The sealing unit 40 further includes a metal cover 5000, which is connected to the side of the yoke plate 1200 facing away from the insulating cover 1100, and the metal cover 5000 covers the second through hole 1210 on the yoke plate 1200. The metal cover 5000 and the yoke plate 1200 enclose a chamber for accommodating the static iron core 4300 and the moving iron core 4400 of the magnetic circuit part 4000.

[0132] Return to Reference Figure 1 The coil unit 20 includes a coil frame 21 and a coil 22. The coil frame 21 is hollow and cylindrical and is made of insulating material. The metal cover 5000 is inserted into the coil frame 21. The coil 22 surrounds the coil frame 21.

[0133] like Figure 2 and Figure 3As shown, the magnetic circuit part 4000 includes a static iron core 4300, a moving iron core 4400 and a reset member 4500. The static iron core 4300 is fixedly arranged in the metal cover 5000, and part of the static iron core 4300 extends into the second through hole 1210. The static iron core 4300 has a through hole 4310, and the through hole 4310 is arranged corresponding to the position of the second through hole 1210, for the rod portion 3212 to pass therethrough. The moving iron core 4400 is movably arranged in the metal cover 5000, and is arranged opposite to the static iron core 4300 along the axial direction of the rod portion 3212. The moving iron core 4400 is connected to the rod portion 3212, and is used to be attracted by the static iron core 4300 when the coil 22 is energized. The moving iron core 4400 and the rod portion 3212 can be connected by screwing, riveting, welding or other methods.

[0134] The reset member 4500 is located inside the metal cover 5000 and is disposed between the static iron core 4300 and the moving iron core 4400, and is used to reset the moving iron core 4400 when the coil 22 is powered off. The reset member 4500 can be a spring and is sleeved on the outside of the rod 3212.

[0135] It should be noted that when the coil 22 is energized, the magnetic circuit portion 4000 can drive the push rod assembly 3200 to move upward through the rod portion 3212. When the movable spring piece 3110 contacts the static contact lead-out end 2000, the movable spring piece 3110 is stopped by the static contact lead-out end 2000, while the rod portion 3212 and the base 3211 will continue to move upward until the overtravel is completed.

[0136] like Figure 2 Figure 3 As shown, the high-voltage DC relay of the embodiment of the present application further includes a magnetic conductive component 6000, a plurality of second magnetic conductive bodies 6200 are respectively fixedly connected to the side of the plurality of movable spring pieces 3110 facing away from the static contact lead-out terminal 2000, the magnetic conductive component 6000 is arranged on the side of the plurality of movable spring pieces 3110 facing the static contact lead-out terminal 2000, and the magnetic conductive component 6000 is used to form a magnetic conductive circuit with the plurality of second magnetic conductive bodies 6200. The magnetic conductive component 6000 is arranged between a pair of static contact lead-out terminals 2000.

[0137] In one embodiment, the magnetic conductive assembly 6000 includes a first magnetic conductive body 6100 , and the first magnetic conductive body 6100 spans across a plurality of movable reed pieces 3110 . Each second magnetic conductive body 6200 is used to form a magnetic conductive loop with the first magnetic conductive body 6100 .

[0138] When the two ends of the plurality of movable spring pieces 3110 arranged side by side are in contact with a pair of stationary contact lead-out terminals 2000, the second magnetizer 6200 moving together with the movable spring piece 3110 approaches or contacts the first magnetizer 6100, thereby forming a magnetic conductive loop around the movable spring piece 3110 between the first magnetizer 6100 and each second magnetizer 6200. When the short-circuit current passes through the movable spring piece 3110, a magnetic attraction force in the contact pressure direction is generated between the first magnetizer 6100 and the second magnetizer 6200, and the magnetic attraction force can resist the electromotive repulsion force generated by the short-circuit current between the movable spring piece 3110 and the stationary contact lead-out terminal 2000, thereby ensuring that the movable spring piece 3110 and the stationary contact lead-out terminal 2000 do not bounce apart.

[0139] It can be understood that since the two ends of the multiple dynamic spring assemblies 3100 are respectively in contact with a pair of static contact lead-out terminals 2000 to form a reliable parallel circuit, the shunting effect is achieved. According to the principle that the magnitude of the electric repulsion force is proportional to the square of the current, the magnitude of the electric repulsion force between each contact is significantly reduced. Then, when resisting the same magnitude of short-circuit current, the relay of the embodiment of the present application can use a smaller magnetic conductive component 6000 and / or a second magnetic conductive body 6200, thereby reducing the space occupied by the anti-short circuit structure, which is conducive to the miniaturization of the relay. From another perspective, when using a magnetic conductive component 6000 and / or a second magnetic conductive body 6200 of the same volume, the embodiment of the present application can resist a larger electric repulsion force and improve the anti-short circuit capability.

[0140] It is understandable that the second magnetic conductor 6200 and the movable spring piece 3110 can be fixedly connected by riveting, but it is not limited thereto.

[0141] The first magnetic conductor 6100 and the second magnetic conductor 6200 can both be in a straight line shape, a U shape, an L shape, or an E shape. The first magnetic conductor 6100 and the second magnetic conductor 6200 can be made of magnetic conductive materials such as iron, cobalt, nickel, and alloys thereof.

[0142] For example, if Fig. 9 As shown, the first magnetic conductor 6100 is in a straight line shape, and the second magnetic conductor 6200 is in a U shape; Fig.10 As shown, the first magnetic conductor 6100 and the second magnetic conductor 6200 are both L-shaped; Fig.11 As shown, the first magnetic conductor 6100 is U-shaped, and the second magnetic conductor 6200 is L-shaped; Fig.12 As shown, the first magnetic conductor 6100 is in an E-shape, and the second magnetic conductor 6200 is in an I-shape.

[0143] The first magnetic conductor 6100 may be connected to the contact container 1000 via two connectors 6300 . One end of the two connectors 6300 is connected to the contact container 1000 , and the other end of the two connectors 6300 is connected to the first magnetic conductor 6100 .

[0144] It can be understood that the first magnetic conductor 6100 is connected to the contact container 1000 through the connecting piece 6300, so that the magnetic attraction force for resisting short circuit is transferred to the contact container 1000. Since the contact container 1000 is a stationary component, there is no need for excessive coil holding force, thereby reducing the power consumption of the coil of the relay and the volume of the relay, and improving the short circuit resistance.

[0145] In one embodiment, the connecting member 6300 is rod-shaped, one axial end of the connecting member 6300 is fixedly connected to the ceramic cover 1110 of the insulating cover 1100 , and the other axial end of the connecting member 6300 is connected to the first magnetic conductor 6100 .

[0146] In the embodiment of the present application, a third through hole 1111 is formed on the top wall of the ceramic cover 1110 of the contact container 1000, and the connector 6300 is passed through the third through hole 1111. The connection between the axial end of the connector 6300 and the ceramic cover 1110 can be implemented in a variety of ways, such as welding, riveting, screwing, bonding, etc. The connection between the other end of the connector 6300 and the first magnetic conductor 6100 can also be implemented in a variety of ways, such as welding, riveting, screwing, bonding, clamping, etc.

[0147] It can be understood that when one end of the connector 6300 is connected to the ceramic cover 1110 by welding, by welding the connector 6300 to the top wall of the ceramic cover 1110, the metallization layer can be processed only on the periphery of the third through hole 1111 on the outer wall surface of the top wall, without the need to process the metallization layer on the inner wall surface of the top wall, which facilitates processing and simplifies the processing steps.

[0148] It is understandable that one end of the connector 6300 may be connected to the outer wall surface of the ceramic cover 1110 , may be connected to the inner wall surface of the ceramic cover 1110 , or may be connected to both the outer wall surface and the inner wall surface of the ceramic cover 1110 .

[0149] In the embodiment of the present application, one end of the connector 6300 is connected to the periphery of the third through hole 1111 of the ceramic cover 1110 , but the present invention is not limited thereto.

[0150] It can be seen from this that the first magnetic conductor 6100 is connected to the ceramic cover 1110 through the connecting piece 6300. On the one hand, the magnetic attraction force to resist short circuit is transferred to the ceramic cover 1110, so there is no need for excessive coil holding force, thereby reducing the power consumption of the coil of the relay and the volume of the relay, and improving the short circuit resistance. On the other hand, since the connecting piece 6300 is connected to the ceramic cover 1110, it will not occupy too much space in the contact chamber 1001, thereby ensuring the arc extinguishing space of the arc extinguishing assembly and the activity space of the push rod.

[0151] In addition, the first magnetic conductor 6100 is connected to the rod-shaped connecting member 6300, so that a variety of connection methods can be used between the first magnetic conductor 6100 and the connecting member 6300, such as riveting, laser welding, clamping, gluing, etc., which enriches the connection methods.

[0152] As an example, the connecting member 6300 is a solid rod. In this way, the connecting member 6300 and the first magnetic conductor 6100 can be connected by riveting, making the connection more reliable. In addition, the solid rod has a higher support strength and is less prone to deformation.

[0153] Of course, in other embodiments, the first magnetizer 6100 can also be fixedly mounted on the yoke plate 1200 via a fixing frame (not shown in the figure). Specifically, the fixing frame is fixedly connected to a side surface of the yoke plate 1200 facing the plurality of dynamic spring assemblies 3100, and the first magnetizer 6100 is fixedly connected to the fixing frame.

[0154] Optionally, the first magnetic conductor 6100 may include a plurality of stacked magnetic conductors. It is understood that by increasing the number of thinner magnetic conductors, the overall thickness of the first magnetic conductor 6100 may be increased. On the one hand, the magnetic conductors are thinner and can be made of thin strips, so the material cost is low and easy to operate. On the other hand, the number of magnetic conductors can be flexibly adjusted according to the size of the short-circuit current.

[0155] like Figure 2 and Figure 3 As shown, the elastic component 3300 includes an elastic member, and multiple dynamic spring components 3100 are installed on the push rod component 3200 through an elastic member. In the embodiment of the present application, the elastic member is a compression spring 100, and one axial end of the compression spring 100 abuts against the multiple dynamic spring components 3100, and the other axial end of the compression spring 100 abuts against the push rod component 3200, which is used to provide contact pressure. In detail, one axial end of the compression spring 100 abuts against the base 3211 of the push rod component 3200, and the other axial end of the compression spring 100 abuts against the multiple dynamic spring components 3100 at the same time.

[0156] Each dynamic spring assembly 3100 has a first limiting portion 6210 , and one axial end of the compression spring 100 is limitedly matched with the plurality of first limiting portions 6210 , so that one axial end of the compression spring 100 is limitedly connected with the plurality of dynamic spring assemblies 3100 .

[0157] In the embodiment of the present application, the second magnetic conductor 6200 of each movable spring assembly 3100 has a first limiting portion 6210 , and one axial end of the compression spring 100 is simultaneously limited and matched with the first limiting portions 6210 of the plurality of second magnetic conductors 6200 .

[0158] In one embodiment, the first limiting portion 6210 may be a groove or a protrusion. When the first limiting portion 6210 is a groove, one axial end of the compression spring 100 may be inserted into a plurality of grooves. When the first limiting portion 6210 is a protrusion, a plurality of protrusions may extend into one end of the compression spring 100.

[0159] A second limiting portion 3230 is provided on one side of the base 3211 facing the multiple dynamic spring assemblies 3100 , and the other axial end of the compression spring 100 is limitedly matched with the second limiting portion 3230 , so that the other axial end of the compression spring 100 is limitedly connected to the base 3211 .

[0160] In one embodiment, the second limiting portion 3230 may be a groove or a protrusion.

[0161] It should be noted that the term "limited connection" in this application means that after two components are connected, the relative movement in the direction parallel to the yoke plate 1200 is limited. For example, the compression spring 100 is limitedly connected with the plurality of second magnetizers 6200, which should be understood as the compression spring 100 cannot move relative to the plurality of second magnetizers 6200 in the direction parallel to the yoke plate 1200.

[0162] like Figure 4 As shown, the similarities between the second embodiment and the first embodiment are not repeated here, and the differences are as follows:

[0163] The magnetic conductive assembly 6000 includes a plurality of first magnetic conductive bodies 6100 corresponding to the number of the plurality of movable spring assemblies 3100, and the plurality of first magnetic conductive bodies 6100 are respectively located on one side of the plurality of movable spring pieces 3110 facing the static contact lead-out end 2000. The first magnetic conductive bodies 6100 and the second magnetic conductive bodies 6200 on both sides of a movable spring piece 3110 are used to form a magnetic conductive circuit. The plurality of first magnetic conductive bodies 6100 are all fixedly connected to the surface of one side of the top wall 3221 of the contact support 3220 facing the plurality of movable spring assemblies 3100. In other words, the magnetic conductive assembly 6000 of the relay of the second embodiment is a follower type.

[0164] In another embodiment, the distance between the magnetic component 6000 and the second magnetic conductor 6200 can be designed to be variable. Specifically, the distance between the magnetic component 6000 and the second magnetic conductor 6200 can be adjusted according to the current value, thereby changing the magnetic attraction generated between the magnetic component 6000 and the second magnetic conductor 6200, while meeting the requirements of short circuit resistance and overload disconnection.

[0165] like Figure 5 As shown, the similarities between the third embodiment and the second embodiment are not repeated here, and the differences are as follows:

[0166] The elastic component 3300 includes a plurality of elastic members, the number of which corresponds to the number of the plurality of dynamic spring components 3100 , and each elastic member is used to provide contact pressure to the corresponding dynamic spring component 3100 .

[0167] In the embodiment of the present application, each elastic member is a compression spring 100 , and one axial end of the plurality of compression springs 100 respectively abuts against the push rod assembly 3200 , and the other axial ends of the plurality of compression springs 100 respectively abut against the plurality of dynamic spring assemblies 3100 .

[0168] like Figure 6 As shown, the similarities between the fourth embodiment and the first embodiment are not repeated here, and the differences are as follows:

[0169] The elastic member is a leaf spring 200, which includes a base 210 and two spring arms 220, and the two spring arms 220 are respectively connected to the two ends of the base 210. The base 210 is limitedly connected to the base 3211 of the push rod assembly 3200, for example, the base 210 is provided with a limiting hole 211, and the base 3211 is provided with a limiting protrusion 3240, and the limiting protrusion 3240 is inserted into the limiting hole 211. One of the spring arms 220 abuts against one end of the plurality of movable spring leaves 3110, and the other spring arm 220 abuts against the other end of the plurality of movable spring leaves 3110.

[0170] like Figure 7 As shown, the similarities between the fifth embodiment and the fourth embodiment are not repeated here, and the differences are as follows:

[0171] Both ends of the base 210 along the first direction D1 are provided with a plurality of spring arms 220 arranged side by side along the third direction D3, and the number of the spring arms 220 at each end of the base 210 is the same as the number of the dynamic spring assembly 3100. The plurality of spring arms 220 at one end of the base 210 abut against one end of the plurality of dynamic spring pieces 3110, respectively, and the plurality of spring arms 220 at the other end of the base 210 abut against the other ends of the plurality of dynamic spring pieces 3110, respectively.

[0172] like Figure 8 As shown, the same points as the fourth embodiment will not be described in detail, and the difference between the sixth embodiment and the fourth embodiment is as follows:

[0173] The elastic assembly 3300 includes a plurality of elastic members, each of which is a leaf spring 200. The plurality of leaf springs 200 are all position-limitedly connected to the base 3211 of the push rod assembly 3200, and the plurality of leaf springs 200 are respectively in contact with the plurality of dynamic spring assemblies 3100. Specifically, the base 210 of each leaf spring 200 is position-limitedly connected to the base 3211 of the push rod assembly 3200, and the two spring arms 220 on both sides of the base 210 are in contact with the same dynamic spring assembly 3100.

[0174] It is understandable that, in the first to sixth embodiments, each movable spring assembly 3100 may also include only a movable spring piece 3110, but not a second magnetic conductor 6200. The magnetic conductor assembly 6000 is disposed on one side of the plurality of movable spring pieces 3110 facing the static contact lead-out end 2000. When the plurality of movable spring pieces 3110 are energized, the magnetic conductor assembly 6000 is magnetized, thereby forming a suction force on the plurality of movable spring pieces 3110 in the direction of contact closure, thereby achieving an anti-short circuit effect.

[0175] like Fig.13 As shown, in one embodiment, each first magnetic conductor 6100 includes a top 6110 and two side portions 6120, the top 6110 is located on the side of the movable spring 3110 facing the static contact lead-out terminal 2000, the two side portions 6120 are respectively connected to the two sides of the top 6110 along the third direction D3, and extend from the top 6110 in the direction away from the static contact lead-out terminal 2000; the two side portions 6120 of the first magnetic conductor 6100 are respectively located on the two sides of the same movable spring 3110 along the third direction D3. In this way, in the third direction D3, the two side portions 6120 of the first magnetic conductor 6100 can limit the movable spring 3110, avoid the movable spring 3110 from moving along the second direction D2, ensure the reliability of the contact between the multiple movable springs 3110 and the static contact lead-out terminal 2000, and thus ensure the consistency of the relay product.

[0176] In one embodiment, two adjacent first magnetic conductors 6100 among the plurality of first magnetic conductors 6100 are connected into an integral structure via two side portions 6120 .

[0177] In another embodiment, two adjacent first magnetic conductors 6100 are split structures. In addition, the two adjacent first magnetic conductors 6100 may contact each other or may not contact each other.

[0178] It should be noted that Fig.13 The illustrated embodiment may be applicable to any of the above-described embodiments including a plurality of first magnetic conductors 6100 .

[0179] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0180] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0181] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0182] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0183] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A high voltage DC relay, characterized in that: include: A pair of static contact terminals; Push rod assembly; as well as A plurality of dynamic spring assemblies, each of which comprises a dynamic spring sheet, and two ends of each dynamic spring sheet along a first direction are respectively used to contact or separate with a pair of static contact lead-out terminals; wherein the first direction is the arrangement direction of the pair of static contact lead-out terminals; A magnetic conductive component, disposed on one side of the plurality of movable springs facing the lead-out ends of the static contacts, for resisting the electromotive repulsive force between the contacts; and The elastic component is connected to the plurality of dynamic spring components and the push rod component, and the elastic component is used for providing contact pressure.

2. The high voltage DC relay according to claim 1, characterized in that: The magnetic conductive component comprises a first magnetic conductive body, which is arranged on one side of the plurality of movable spring pieces facing the static contact lead-out end and spans across the plurality of movable spring pieces.

3. The high voltage DC relay according to claim 1, characterized in that: Each movable spring assembly also includes a second magnetic conductor, which is fixedly connected to the side of the movable spring piece facing away from the static contact lead-out end. The multiple second magnetic conductors of the multiple movable spring assemblies are used to form a magnetic conductive circuit with the magnetic conductive assemblies respectively.

4. The high voltage DC relay according to claim 3, characterized in that: The magnetic conductive component includes a plurality of first magnetic conductive bodies, the plurality of first magnetic conductive bodies correspond to the number of the plurality of movable spring pieces, and the plurality of first magnetic conductive bodies are respectively located on one side of the plurality of movable spring pieces facing the lead-out end of the static contact, and the first magnetic conductive bodies and the second magnetic conductive bodies on both sides of one movable spring piece are used to form a magnetic conductive circuit.

5. The high voltage DC relay according to claim 4, characterized in that: Each of the first magnetic conductors includes a top and two side portions, the top portion is located on a side of the movable spring piece facing the static contact lead-out end, the two side portions are respectively connected to two sides of the top portion along a third direction, and extend from the top portion in a direction away from the static contact lead-out end; the two side portions of the first magnetic conductor are respectively located on two sides of the same movable spring piece along the third direction; The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

6. The high voltage DC relay according to claim 5, characterized in that: Two adjacent first magnetic conductors are connected to form an integral structure through the two side portions; or, two adjacent first magnetic conductors are separate structures.

7. The high voltage DC relay according to claim 1, characterized in that: The elastic component is an elastic member, which is directly connected to the plurality of dynamic spring components and the push rod component, and is used to provide contact pressure.

8. The high voltage DC relay according to claim 7, characterized in that: The elastic member is a compression spring, one axial end of the compression spring abuts against the plurality of dynamic spring assemblies, and the other axial end of the compression spring abuts against the push rod assembly.

9. The high voltage DC relay according to claim 8, characterized in that: Each of the dynamic spring assemblies has a first limiting portion, and one axial end of the compression spring is limitedly matched with a plurality of the first limiting portions; The push rod assembly has a second limiting portion, and the other axial end of the compression spring is limitedly matched with the second limiting portion.

10. The high voltage DC relay according to claim 7, characterized in that: The elastic member is a leaf spring, and the leaf spring is directly connected to the push rod assembly and the plurality of dynamic spring assemblies.

11. The high voltage DC relay according to claim 10, characterized in that: The leaf spring comprises a base and a spring arm, and at least one spring arm is respectively provided on both sides of the base along the first direction; The base is connected to the push rod assembly, and the spring arms on both sides of the base are respectively abutted against two ends of a plurality of the movable spring assemblies.

12. The high voltage DC relay according to claim 11, characterized in that: A plurality of spring arms arranged side by side along a third direction are respectively provided on both sides of the base along the first direction; The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

13. The high voltage DC relay according to claim 1, characterized in that: The elastic component is a plurality of elastic members, the number of the plurality of elastic members corresponds to the number of the plurality of dynamic spring components, and each of the elastic members is used to provide contact pressure to the corresponding dynamic spring component.

14. The high voltage DC relay according to claim 13, characterized in that: Each of the elastic members is a compression spring, one axial end of the plurality of compression springs is respectively in contact with the push rod assembly, and the other axial ends of the plurality of compression springs are respectively in contact with the plurality of dynamic spring assemblies.

15. The high voltage DC relay according to claim 13, characterized in that: Each of the elastic members is a leaf spring, and the plurality of leaf springs are all position-limitingly connected to the push rod assembly and are respectively in contact with the plurality of dynamic spring assemblies.

16. The high voltage DC relay according to claim 1, characterized in that: The magnetic conductive component is arranged between a pair of static contact lead-out terminals.

17. The high voltage DC relay according to claim 1, characterized in that: The plurality of movable springs are arranged side by side along a third direction; The moving direction of the movable spring is the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

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