HIGH VOLTAGE DC RELAY

Abstract

The invention relates to a high-voltage DC relay comprising a pair of fixed-contact terminals, a push rod assembly, movable contact assemblies, a magnetic assembly, and an elastic assembly. Each movable contact assembly comprises movable contact pieces; the movable contact pieces are arranged side-by-side; and the two ends of each movable contact piece in the first direction are configured to either contact or be separated from the fixed-contact terminal pair, wherein the first direction is the direction in which the fixed-contact terminal pair is arranged. The magnetic assembly is arranged on the side of the movable contact pieces facing the fixed-contact terminals, and is used to limit the electromotive force between the contacts. The elastic assembly is connected to the movable contact assemblies and the push rod assembly, and is used to provide contact pressure.

Description

High-voltage DC relays

[0001] This disclosure claims priority to Chinese patent application No. 202311187743.X filed on September 14, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of electronic control devices, and in particular to a high-voltage direct current relay. Background Art

[0003] A relay is an electronic control device with a control circuit (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger one. Therefore, it plays a role in automatic regulation, safety protection, and circuit switching.

[0004] As one type of relay, a high-voltage DC relay includes a pair of static contact terminals, a dynamic spring assembly, an elastic member, and a push rod assembly. The dynamic spring assembly is mounted on the push rod assembly through the elastic member. The movement of the push rod assembly drives the dynamic spring assembly to move, thereby achieving contact or separation between the dynamic spring assembly and the pair of static contact terminals.

[0005] However, the dynamic 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 large 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.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a high-voltage DC relay to solve the problems of large electric repulsion between contacts and large contact resistance in the prior art.

[0008] The high-voltage DC relay according to the embodiment of the present disclosure includes:

[0009] A pair of static contact terminals;

[0010] a push rod assembly; and

[0011] a plurality of dynamic spring assemblies, each of the dynamic spring assemblies comprising a dynamic spring leaf, and each of the two ends of the dynamic spring leaf along a first direction being respectively used to contact or separate with a pair of the static contact lead-out terminals; wherein the first direction is the arrangement direction of the pair of the static contact lead-out terminals;

[0012] a magnetic conductive component, provided 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

[0013] An elastic component is connected to the plurality of dynamic spring components and the push rod component, and the elastic component is used to provide contact pressure.

[0014] According to some embodiments of the present disclosure, the magnetic conductive component includes a first magnetic conductive body, which is arranged on a side of the plurality of movable springs facing the static contact lead-out ends and spans the plurality of movable springs.

[0015] According to some embodiments of the present disclosure, each dynamic spring assembly further 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 a magnetic circuit with the magnetic conductor assembly respectively.

[0016] According to some embodiments of the present disclosure, the magnetic conductive component includes a plurality of first magnetic conductive bodies, the plurality of first magnetic conductive bodies corresponds to the number of the plurality of movable springs, and the plurality of first magnetic conductive bodies are respectively located on one side of the plurality of movable springs 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 are used to form a magnetic conductive circuit.

[0017] According to some embodiments of the present disclosure, each of the first magnetic conductors includes a top and two side portions, the top being located on a side of the movable reed piece facing the static contact lead-out end, the two side portions being respectively connected to two sides of the top along a third direction and extending from the top 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;

[0018] 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.

[0019] According to some embodiments of the present disclosure, 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.

[0020] According to some embodiments of the present disclosure, the elastic component is an elastic member, which 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.

[0021] According to some embodiments of the present disclosure, 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.

[0022] According to some embodiments of the present disclosure, each of the dynamic spring assemblies has a first limiting portion, and one axial end of the compression spring is in limiting cooperation with a plurality of the first limiting portions;

[0023] The push rod assembly has a second limiting portion, and the other axial end of the compression spring is limitedly engaged with the second limiting portion.

[0024] According to some embodiments of the present disclosure, 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.

[0025] According to some embodiments of the present disclosure, the leaf spring includes a base, and at least one spring arm is respectively provided on both sides of the base along the first direction;

[0026] The base is connected to the push rod assembly, and the spring arms on both sides of the base are respectively in contact with two ends of a plurality of dynamic spring assemblies.

[0027] According to some embodiments of the present disclosure, 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;

[0028] 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.

[0029] According to some embodiments of the present disclosure, 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.

[0030] According to some embodiments of the present disclosure, each of the elastic members is a compression spring, and one axial end of the plurality of compression springs abuts against the push rod assembly respectively, and the other axial ends of the plurality of compression springs abut against the plurality of dynamic spring assemblies respectively.

[0031] According to some embodiments of the present disclosure, 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 respectively abut against the plurality of dynamic spring assemblies.

[0032] According to some embodiments of the present disclosure, the magnetic conductive component is disposed between a pair of static contact lead-out terminals.

[0033] According to some embodiments of the present disclosure, a plurality of the movable reeds are arranged side by side along a third direction;

[0034] 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.

[0035] One embodiment of the above application has at least the following advantages or beneficial effects:

[0036] In the high-voltage DC relay of the disclosed embodiment, 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 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.

[0037] 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

[0038] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0039] FIG1 is an exploded schematic diagram showing a high-voltage DC relay according to an exemplary embodiment of the present disclosure.

[0040] FIG2 is an exploded schematic diagram of a high-voltage DC relay according to an exemplary embodiment of the present disclosure, in which a housing, an arc extinguishing unit, and a coil unit are omitted.

[0041] FIG3 is a cross-sectional view taken along line AA in FIG1 .

[0042] FIG4 is an exploded schematic diagram showing a high-voltage DC relay according to another exemplary embodiment of the present disclosure, in which a housing, an arc extinguishing unit, and a coil unit are omitted.

[0043] FIG5 is an exploded schematic diagram showing a high-voltage DC relay according to another exemplary embodiment of the present disclosure, in which a housing, an arc extinguishing unit, and a coil unit are omitted.

[0044] FIG6 is an exploded schematic diagram of a moving component of a high-voltage DC relay according to a fourth exemplary embodiment of the present disclosure.

[0045] FIG7 is an exploded schematic diagram of a moving component of a high-voltage DC relay according to a fifth exemplary embodiment of the present disclosure.

[0046] FIG8 is an exploded schematic diagram of a moving component of a high-voltage DC relay according to a sixth exemplary embodiment of the present disclosure.

[0047] 9 to 12 are schematic diagrams showing first and second magnetic conductors of different shapes, respectively.

[0048] FIG13 is a schematic diagram showing a first magnetic conductor including a top and two side portions according to an exemplary embodiment of the present disclosure.

[0049] The description of the accompanying drawings is as follows:

[0050] 1. High-voltage DC relay; 10. Housing; 11. First housing; 11a. Exposure hole; 12. Second housing; 20. Coil unit; 21. Coil frame; 22. Coil; 30. Arc extinguishing unit; 31. Arc extinguishing magnet; 32. Yoke clamp; 40. Sealing unit; 1000. Contact container; 1001. Contact chamber; 1002. First through-hole; 1100. Insulating cover; 1110. Ceramic cover; 1111. Third through-hole; 1120. Frame; 1200. Yoke plate; 1210. Second through-hole; 2000. Static contact terminal; 3000. Moving assembly; 3100. Moving spring assembly; 3110. Moving spring; 3200. Push rod assembly; 3210. Push rod; 3211. Bottom Seat; 3212, rod; 3213, card; 3220, contact bracket; 3221, top wall; 3222, side wall; 3223, card hole; 3230, second limiting portion; 3240, limiting protrusion; 3300, elastic component; 4000, magnetic circuit portion; 4300, static iron core; 4310, through hole; 4400, moving iron core; 4500, reset member; 5000, metal cover; 6000, magnetic conductive component; 6100, first magnetic conductor; 6110, top; 6120, side; 6200, second magnetic conductor; 6210, first limiting portion; 6300, connecting member; 100, compression spring; 200, leaf spring; 210, base; 211, limiting hole; 220, spring arm. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0052] As shown in Figure 1, a high-voltage DC relay 1 according to an embodiment of the present disclosure includes a housing 10, a coil unit 20, an arc-extinguishing unit 30, and a sealing unit 40. The sealing unit 40 is disposed within the housing 10, with the top of the static contact lead-out terminal of the sealing unit 40 exposed to the outer surface of the housing 10 through an exposure hole 11a in the housing 10. The coil unit 20 and the arc-extinguishing unit 30 are both disposed within the housing 10.

[0053] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present disclosure are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0054] 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 disclosure, the exposure hole 11a is provided in the first shell 11.

[0055] The arc extinguishing unit 30 is used to extinguish the arc generated between the static contact lead-out terminal of the sealing unit 40 and the movable reed.

[0056] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 can be permanent magnets, and each arc extinguishing magnet 31 can be substantially rectangular. The two arc extinguishing magnets 31 are respectively disposed on either side of the sealing unit 40 and are arranged opposite each other along the length direction of the movable spring.

[0057] By providing two arc-extinguishing magnets 31 disposed opposite to each other, a magnetic field can be formed around the static contact lead-out terminal and the movable spring. Therefore, the arc generated between the static contact lead-out terminal and the movable spring will be stretched away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0058] The arc extinguishing unit 30 also includes two yoke clamps 32, which are arranged corresponding to the positions of the two arc extinguishing magnets 31. In addition, the two yoke clamps 32 surround the sealing unit 40 and the two arc extinguishing magnets 31. The design of the yoke clamps 32 surrounding the arc extinguishing magnets 31 can prevent the magnetic field generated by the arc extinguishing magnets 31 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 32 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0059] As shown in FIG. 2 and FIG. 3 , the sealing unit 40 includes a contact container 1000 , a pair of static contact lead terminals 2000 , a moving assembly 3000 , and a magnetic circuit portion 4000 .

[0060] 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 cavity. In addition, the contact container 1000 can be formed by connecting multiple components in a predetermined assembly method.

[0061] 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 .

[0062] 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 via 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, also by laser welding, brazing, resistance welding, gluing, etc. A frame piece 1120 is provided 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.

[0063] The contact container 1000 further has a pair of first through holes 1002 , which are connected to the contact chamber 1001 . The first through holes 1002 are used to allow the static contact lead terminals 2000 to pass through. In the embodiment of the present disclosure, the first through holes 1002 are formed on the ceramic cover 1110 .

[0064] 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.

[0065] A pair of static contact lead-out terminals 2000 are respectively disposed in the pair of first through holes 1002 and connected to the ceramic cover 1110 , for example, by welding.

[0066] The bottom of the static contact lead-out terminal 2000 serves as a static contact, and the static contact can be provided at the bottom of the static contact lead-out terminal 2000 in an integrated or split manner.

[0067] Continuing with Figures 2 and 3 , the dynamic assembly 3000 includes multiple side-by-side movable spring assemblies 3100, a push rod assembly 3200, and an elastic assembly 3300. The multiple movable spring assemblies 3100 are disposed within the insulating cover 1100. The ends of the multiple movable spring assemblies 3100 along a first direction D1 are configured to contact or separate from a pair of stationary contact terminals 2000. The first direction D1 represents the arrangement direction of the pair of stationary contact terminals 2000. It will be appreciated that the multiple movable spring assemblies 3100 are arranged side by side, so that the multiple movable spring assemblies 3100 form multiple contact points with each stationary contact terminal 2000, such as two, three, or four.

[0068] 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 disclosure may include multiple sets of combinations.

[0069] Each dynamic spring assembly 3100 includes a dynamic spring piece 3110. The dynamic spring pieces 3110 of the dynamic spring assemblies 3100 are configured to engage or disengage with a pair of static contact terminals 2000 at their respective ends along the first direction D1. The dynamic spring pieces 3110 may include a dynamic spring body and dynamic contacts disposed at both ends of the dynamic spring body. The dynamic contacts may be separate components connected to the dynamic spring body. Alternatively, the dynamic contacts may be integrally formed with the dynamic spring body.

[0070] The dynamic spring assembly 3100 also 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 terminal 2000. The elastic assembly 3300 is in direct contact with the plurality of second magnetic conductors 6200. The function of the second magnetic conductors 6200 will be described in detail below.

[0071] In the disclosed embodiment, the movable assembly 3000 includes two side-by-side movable spring assemblies 3100. One end of each movable spring assembly 3100 is used to contact or separate with the static contact of one of the static contact lead terminals 2000, while the other end of each movable spring assembly 3100 is used to contact or separate with the static contact of the other static contact lead terminal 2000. Specifically, one end of each movable spring assembly 3100 forms two contact points with one of the static contact lead terminals 2000, while the other end of each movable spring assembly 3100 forms two contact points with the other static contact lead terminal 2000.

[0072] In other embodiments, the number of the dynamic spring assemblies 3100 can also be three, four, five, etc.

[0073] It is understood that the dynamic assembly 3000 includes multiple dynamic spring assemblies 3100, each of which includes a dynamic spring piece 3110. The two ends of the multiple dynamic spring pieces 3110 respectively contact or separate with a pair of static contact lead-out terminals 2000. Since the multiple dynamic spring pieces 3110 do not restrict each other, the two ends of the multiple dynamic spring pieces 3110 respectively 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 multiple dynamic spring pieces 3110 and a static contact lead-out terminal 2000 is greater than or equal to two, achieving a shunting effect. In addition, based on the principle that the magnitude of the electromotive repulsive force is proportional to the square of the current, the magnitude of the electromotive repulsive force between each contact point is significantly reduced, which is conducive to improving the short-circuit resistance and enhancing the reliability of the relay.

[0074] As shown in Figures 2 and 3, the direction of movement of the dynamic spring 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. The two side walls 3222 are integrally 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. Multiple dynamic spring assemblies 3100 are installed in the contact bracket 3220 via the 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.

[0075] A locking 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, with the base 3211 connected to one axial end of the rod portion 3212. Locks 3213 are provided on either side of the base 3211, which snap into the two locking holes 3223 of the contact support 3220, securing the base 3211 to the contact support 3220. The elastic assembly 3300 is disposed between the multiple dynamic spring assemblies 3100 and the base 3211, and is used to apply an elastic force to the multiple dynamic spring assemblies 3100, causing them to move toward the top wall 3221, thereby providing contact pressure. The multiple dynamic spring assemblies 3100 are disposed within the space enclosed by the contact support 3220 and the base 3211.

[0076] In other embodiments, the contact holder 3220 may also have other structures, which are not listed here one by one.

[0077] It can be understood that the elastic component 3300 can be used to flexibly support multiple dynamic spring components 3100 to provide contact pressure.

[0078] The plurality of movable springs 3110 are arranged side by side along the third direction D3.

[0079] 2 and 3 , the yoke plate 1200 has a second through-hole 1210 extending through two opposing sides of the yoke plate 1200 along its thickness. The second through-hole 1210 communicates with the contact chamber 1001 of the contact container 1000. A rod 3212 is axially movably disposed through the second through-hole 1210. A base 3211 at one axial end of the rod 3212 is disposed within the contact chamber 1001.

[0080] 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 covers the second through hole 1210 in 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 movable iron core 4400 of the magnetic circuit portion 4000.

[0081] Referring back to FIG1 , 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 .

[0082] As shown in Figures 2 and 3, 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 through it. 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.

[0083] The reset member 4500 is located inside the metal cover 5000 and is arranged between the static iron core 4300 and the movable iron core 4400. It is used to reset the movable 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.

[0084] 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 via the rod portion 3212. When the movable spring 3110 contacts the static contact lead 2000, the movable spring 3110 is stopped by the static contact lead 2000, while the rod portion 3212 and the base 3211 continue to move upward until the overtravel is completed.

[0085] As shown in Figures 2 and 3 , the high-voltage DC relay of the present embodiment further includes a magnetic conductive assembly 6000. A plurality of second magnetic conductive bodies 6200 are respectively fixedly connected to the side of the plurality of movable springs 3110 facing away from the stationary contact lead terminals 2000. The magnetic conductive assembly 6000 is disposed on the side of the plurality of movable springs 3110 facing the stationary contact lead terminals 2000. The magnetic conductive assembly 6000 is configured to form a magnetic conductive circuit with the plurality of second magnetic conductive bodies 6200. The magnetic conductive assembly 6000 is disposed between a pair of stationary contact lead terminals 2000.

[0086] In one embodiment, the magnetic conductive assembly 6000 includes a first magnetic conductive body 6100 , which spans across a plurality of movable reeds 3110 . Each second magnetic conductive body 6200 is configured to form a magnetic conductive loop with the first magnetic conductive body 6100 .

[0087] When the ends of multiple, side-by-side movable springs 3110 come into contact with a pair of stationary contact terminals 2000, the second magnetic conductors 6200, which move with the movable springs 3110, approach or contact the first magnetic conductors 6100, thereby forming a magnetic circuit around the movable springs 3110 between the first magnetic conductors 6100 and each of the second magnetic conductors 6200. When a short-circuit current flows through the movable springs 3110, a magnetic attraction force in the direction of contact pressure is generated between the first magnetic conductors 6100 and the second magnetic conductors 6200. This magnetic attraction counteracts the electrodynamic repulsion force between the movable springs 3110 and the stationary contact terminals 2000 caused by the short-circuit current, preventing the movable springs 3110 and the stationary contact terminals 2000 from bouncing apart.

[0088] It can be understood that since the two ends of the multiple dynamic spring assemblies 3100 are in contact with a pair of static contact lead-out terminals 2000 respectively to form a reliable parallel circuit, the shunting effect is achieved. 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. Then, when resisting the same magnitude of short-circuit current, the relay of the embodiment of the present disclosure 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 disclosure can resist a larger electric repulsive force and improve the anti-short-circuit capability.

[0089] It is understandable that the second magnetic conductor 6200 and the movable spring 3110 can be fixedly connected by riveting, but the present invention is not limited thereto.

[0090] 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.

[0091] For example, as shown in Figure 9, the first magnet 6100 is in the shape of an I, and the second magnet 6200 is in the shape of a U; as shown in Figure 10, the first magnet 6100 and the second magnet 6200 are both L-shaped; as shown in Figure 11, the first magnet 6100 is in the shape of a U, and the second magnet 6200 is in the shape of an I; as shown in Figure 12, the first magnet 6100 is in the shape of an E, and the second magnet 6200 is in the shape of an I.

[0092] 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 .

[0093] 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 to resist 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.

[0094] 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 .

[0095] In the disclosed embodiment, a third through-hole 1111 is defined in the top wall of the ceramic cover 1110 of the contact container 1000, and the connector 6300 is disposed through the third through-hole 1111. The connection between one axial end of the connector 6300 and the ceramic cover 1110 can be achieved through various methods, such as welding, riveting, screwing, or bonding. The connection between the other end of the connector 6300 and the first magnetic conductor 6100 can also be achieved through various methods, such as welding, riveting, screwing, bonding, or clamping.

[0096] 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.

[0097] It is understandable that one end of the connector 6300 may be connected to the outer wall of the ceramic cover 1110 , or to the inner wall of the ceramic cover 1110 , or to both the outer and inner walls of the ceramic cover 1110 .

[0098] In the embodiment of the present disclosure, 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.

[0099] It can be seen from this that the first magnetic conductor 6100 is connected to the ceramic cover 1110 through the connector 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 connector 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.

[0100] 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.

[0101] As an example, the connector 6300 is a solid rod. Thus, the connector 6300 and the first magnetic conductor 6100 can be connected by riveting, making the connection more reliable. Furthermore, a solid rod provides greater support strength and is less prone to deformation.

[0102] Of course, in other embodiments, the first magnetic conductor 6100 can also be fixedly mounted on the yoke plate 1200 via a fixing bracket (not shown). Specifically, the fixing bracket is fixedly connected to a side surface of the yoke plate 1200 facing the plurality of dynamic spring assemblies 3100, and the first magnetic conductor 6100 is fixedly connected to the fixing bracket.

[0103] Optionally, the first magnetic conductor 6100 may include multiple stacked magnetic conductive sheets. It will be appreciated that increasing the number of thinner magnetic conductive sheets can increase the overall thickness of the first magnetic conductor 6100. On the one hand, thinner magnetic conductive sheets can be made from thin strips, resulting in lower material costs and easier handling. On the other hand, the number of magnetic conductive sheets can be flexibly adjusted based on the magnitude of the short-circuit current.

[0104] As shown in Figures 2 and 3, the elastic assembly 3300 includes an elastic member, and multiple dynamic spring assemblies 3100 are mounted on the push rod assembly 3200 via the elastic member. In the disclosed embodiment, the elastic member is a compression spring 100. One axial end of the compression spring 100 abuts against the multiple dynamic spring assemblies 3100, and the other axial end of the compression spring 100 abuts against the push rod assembly 3200 to provide contact pressure. Specifically, one axial end of the compression spring 100 abuts against the base 3211 of the push rod assembly 3200, and the other axial end of the compression spring 100 abuts against the multiple dynamic spring assemblies 3100 at the same time.

[0105] Each dynamic spring assembly 3100 has a first limiting portion 6210 , and one axial end of the compression spring 100 is limitedly engaged with the plurality of first limiting portions 6210 , so that one axial end of the compression spring 100 is limitedly connected to the plurality of dynamic spring assemblies 3100 .

[0106] In the embodiment of the present disclosure, the second magnetic conductor 6200 of each dynamic spring assembly 3100 has a first limiting portion 6210 , and one axial end of the compression spring 100 is simultaneously limited and engaged with the first limiting portions 6210 of the plurality of second magnetic conductors 6200 .

[0107] 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 can be inserted into the multiple grooves. When the first limiting portion 6210 is a protrusion, the multiple protrusions can extend into one end of the compression spring 100.

[0108] 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 engaged with the second limiting portion 3230 , so that the other axial end of the compression spring 100 is limitedly connected to the base 3211 .

[0109] In one embodiment, the second limiting portion 3230 may be a groove or a protrusion.

[0110] It should be noted that the term "limited connection" in this disclosure means that after two components are connected, their relative movement in a direction parallel to the yoke plate 1200 is restricted. For example, the limited connection between the compression spring 100 and the plurality of second magnetic conductors 6200 should be understood to mean that the compression spring 100 cannot move relative to the plurality of second magnetic conductors 6200 in a direction parallel to the yoke plate 1200.

[0111] As shown in FIG4 , the similarities between the second embodiment and the first embodiment are not repeated here, and the differences between the second embodiment and the first embodiment are as follows:

[0112] The magnetic conductive assembly 6000 includes a plurality of first magnetic conductive bodies 6100 corresponding to the number of movable spring assemblies 3100. These first magnetic conductive bodies 6100 are located on the side of the movable spring pieces 3110 facing the static contact lead-out terminal 2000. The first magnetic conductive bodies 6100 and the second magnetic conductive bodies 6200 on either side of a movable spring piece 3110 form a magnetic conductive circuit. Each of the first magnetic conductive bodies 6100 is fixedly connected to a surface of the top wall 3221 of the contact support 3220 facing the movable spring assemblies 3100. In other words, the magnetic conductive assembly 6000 of the relay of the second embodiment is a follower type.

[0113] In another embodiment, the distance between the magnetic assembly 6000 and the second magnetic conductor 6200 can be designed to be variable. Specifically, the distance between the magnetic assembly 6000 and the second magnetic conductor 6200 can be adjusted according to the current value, thereby varying the magnetic attraction between the magnetic assembly 6000 and the second magnetic conductor 6200. This ensures both short-circuit protection and overload disconnection.

[0114] As shown in FIG5 , the third embodiment is similar to the second embodiment and will not be described in detail. The difference between the third embodiment and the second embodiment is as follows:

[0115] The elastic assembly 3300 includes a plurality of elastic members, the number of which corresponds to the number of the dynamic spring assemblies 3100 , and each elastic member is used to provide contact pressure to the corresponding dynamic spring assembly 3100 .

[0116] In the embodiment of the present disclosure, 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 .

[0117] As shown in FIG6 , the fourth embodiment is similar to the first embodiment and the differences therebetween are as follows:

[0118] The elastic member is a leaf spring 200, which includes a base 210 and two spring arms 220, each connected to one end of the base 210. The base 210 is positionally connected to the base 3211 of the push rod assembly 3200. For example, the base 210 is provided with a position-limiting hole 211, and the base 3211 is provided with a position-limiting protrusion 3240, which is inserted into the position-limiting hole 211. One of the spring arms 220 abuts against one end of a plurality of movable spring leaves 3110, while the other spring arm 220 abuts against the other end of the plurality of movable spring leaves 3110.

[0119] As shown in FIG7 , the similarities between the fifth embodiment and the fourth embodiment are not repeated here, and the differences between the fifth embodiment and the fourth embodiment are as follows:

[0120] The base 210 is provided with a plurality of spring arms 220 arranged side by side along the third direction D3 at both ends of the base 210 along the first direction D1. The number of spring arms 220 at each end of the base 210 is the same as the number of dynamic spring assemblies 3100. The multiple spring arms 220 at one end of the base 210 respectively abut against one end of the multiple dynamic spring pieces 3110, while the multiple spring arms 220 at the other end of the base 210 respectively abut against the other ends of the multiple dynamic spring pieces 3110.

[0121] As shown in FIG8 , the sixth embodiment is similar to the fourth embodiment and will not be described in detail. The difference between the sixth embodiment and the fourth embodiment is as follows:

[0122] The elastic assembly 3300 includes multiple elastic members, each of which is a leaf spring 200. Each of the leaf springs 200 is positionally connected to the base 3211 of the push rod assembly 3200, and each of the leaf springs 200 abuts against the multiple dynamic spring assemblies 3100. Specifically, the base 210 of each leaf spring 200 is positionally connected to the base 3211 of the push rod assembly 3200, and the two spring arms 220 on either side of the base 210 abut against the same dynamic spring assembly 3100.

[0123] It is understood that in the first to sixth embodiments described above, each movable spring assembly 3100 may also include only the movable spring piece 3110 without the second magnetic conductor 6200. The magnetic conductor assembly 6000 is disposed on the side of the movable spring pieces 3110 facing the static contact lead-out terminal 2000. When power is supplied to the movable spring pieces 3110, the magnetic conductor assembly 6000 becomes magnetized, thereby applying an attractive force to the movable spring pieces 3110 in the direction of contact closure, thereby achieving an anti-short circuit effect.

[0124] As shown in FIG13 , in one embodiment, each first magnetic conductor 6100 includes a top portion 6110 and two side portions 6120. The top portion 6110 is located on the side of the movable reed 3110 facing the stationary contact lead 2000. The side portions 6120 are connected to either side of the top portion 6110 along a third direction D3 and extend from the top portion 6110 away from the stationary contact lead 2000. The two side portions 6120 of the first magnetic conductor 6100 are located on either side of the same movable reed 3110 along the third direction D3. Thus, in the third direction D3, the two side portions 6120 of the first magnetic conductor 6100 limit the movable reed 3110, preventing movement when the movable reed 3110 moves in the second direction D2. This ensures reliable contact between the multiple movable reeds 3110 and the stationary contact lead 2000, thereby ensuring the consistency of the relay product.

[0125] 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 .

[0126] In another embodiment, two adjacent first magnetic conductors 6100 are separate structures. In addition, the two adjacent first magnetic conductors 6100 may or may not be in contact with each other.

[0127] It should be noted that the embodiment shown in FIG. 13 can be applied to any of the above-mentioned embodiments including a plurality of first magnetic conductors 6100 .

[0128] It is understandable that the various embodiments / implementations provided in the present disclosure can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0129] In the application examples, 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. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0130] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0131] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0132] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

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 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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