Movable contact bridge assembly, relay, power supply module, electrical device, and power supply system

Abstract

The present application relates to the technical field of relays, and in particular to a movable contact bridge assembly, a relay, a power supply module, an electrical device, and a power supply system. The movable contact bridge assembly comprises a movable contact bridge, a protective gasket, and an elastic member. The movable contact bridge has a first surface and a second surface disposed opposite to each other. A movable contact is disposed on the movable contact bridge, and an end of the movable contact protrudes from the first surface of the movable contact bridge. The protective gasket is disposed on the side of the second surface of the movable contact bridge. The elastic member is disposed on the side of the protective gasket away from the second surface of the movable contact bridge, and is configured to abut against the protective gasket. A wear resistance of the protective gasket and the elastic member is greater than a wear resistance of the movable contact bridge. The movable contact bridge assembly of the present application comprises the protective gasket, thereby preventing generation of frictional debris between the movable contact bridge and the elastic member during operation.

Description

Moving contact bridge assembly, relay, power module, electrical device and power supply system

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510014332.3, filed on January 3, 2025, entitled "Moving Contact Bridge Assembly, Relay, Power Supply Module, Electrical Device and Power Supply System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of relay technology, and in particular to a moving contact bridge assembly, a relay, a power module, an electrical device, and a power supply system. Background Technology

[0004] The relay switches power states by moving an internal magnetic mechanism, which in turn moves a push rod assembly on the relay. This push rod assembly has a moving contact bridge assembly. During this movement, the moving contact in the moving contact bridge assembly contacts the stationary contact in the stationary contact bridge assembly, thus switching the power state. However, during this movement, the moving contact bridge assembly may shed debris due to friction, which could affect the relay's safety.

[0005] Therefore, a new moving contact bridge assembly is urgently needed to solve the above problems. Summary of the Invention

[0006] This application provides a moving contact bridge assembly, a relay, a power module, an electrical device, and a power supply system. The moving contact bridge assembly can prevent debris from falling off during operation.

[0007] In a first aspect, this application provides a movable contact bridge assembly, which includes a movable contact bridge, a protective pad, and an elastic element; the movable contact bridge has a first surface and a second surface disposed opposite to each other, a movable contact is disposed on the movable contact bridge, and one end of the movable contact protrudes from the first surface of the movable contact bridge; the protective pad is fixed to one side of the second surface of the movable contact bridge; the elastic element is disposed on the side of the protective pad away from the second surface of the movable contact bridge, and the elastic element is used to abut against the protective pad; wherein, the wear resistance of the protective pad and the elastic element is greater than the wear resistance of the movable contact bridge.

[0008] In this embodiment, when the moving contact bridge assembly is subjected to a high-speed impact, the protective gasket remains relatively fixed to the moving contact bridge, preventing friction between them and thus avoiding frictional shedding of debris. Furthermore, the protective gasket is positioned between the elastic element and the moving contact bridge, with the elastic element abutting against the protective gasket, further reducing relative friction between them. Since both the elastic element and the protective gasket have greater wear resistance than the moving contact bridge, the amount of debris generated during impact wear and / or friction between them is relatively small, thereby improving relay safety. Additionally, the protective gasket prevents the moving contact bridge from shedding debris due to wear from the elastic element during operation, ensuring the stability of the moving contact bridge assembly.

[0009] The moving contact bridge can be made of, but is not limited to, copper, silver, copper alloy, or silver alloy. The protective gasket can be made of, but is not limited to, stainless steel or aluminum alloy. The elastic element can be made of stainless steel, preferably SUS631 stainless steel, which is a high-strength, corrosion-resistant stainless steel.

[0010] In one embodiment, the moving contact bridge assembly may further include a guide structure, which includes a guide seat and a guide post. One end of the guide post is fixed to the guide seat, and the other end of the guide post passes through the protective gasket and the moving contact bridge, and is fixed to one side of the first surface of the moving contact bridge. The elastic post is sleeved on the guide post, and the side of the elastic member away from the protective gasket abuts against the guide seat. The guide structure makes it easier for the elastic member to cooperate with the protective gasket, and the guide structure can also limit the movement of the elastic member.

[0011] In one embodiment, two moving contacts are provided, spaced apart along the extension direction of the moving contact bridge. One end of each moving contact protrudes from the first surface of the moving contact bridge, and the other end of each moving contact may protrude from the second surface of the moving contact bridge. The protective gasket has two clearance holes, with each moving contact corresponding to one clearance hole, allowing the moving contact to pass through the corresponding clearance hole. Alternatively, the moving contacts can be riveted to the protective gasket through the clearance holes to improve the stability of the connection between the moving contact bridge and the protective gasket.

[0012] It is worth mentioning that, in the projection within the second surface of the moving contact bridge, the guide structure is located at the center between the at least two moving contacts, so that the elastic element is subjected to uniform force when the moving contact bridge assembly moves, thereby improving the stability of the moving contact bridge assembly.

[0013] In one embodiment, the protective pad includes a main board and bent portions disposed on both sides of the main board. The main board is attached to the second surface of the moving contact bridge. The bent portions extend from both sides of the moving contact bridge to one side of the first surface to fix the moving contact bridge and the protective pad relative to each other. The two sides are disposed opposite to each other, and the two sides connect the first and second surfaces. The bent portions prevent the moving contact bridge from contacting external structures when the moving contact bridge assembly moves, reducing the probability of wear on the moving contact bridge, and also improving the stability of the connection between the moving contact bridge and the protective pad.

[0014] In one embodiment, a limiting structure is provided on the side of the protective pad opposite to the second surface of the moving contact bridge. This limiting structure restricts the movement of the elastic member within the plane of the protective pad. The limiting structure ensures that the elastic member will not move under compression, or that the amount of movement is minimal. Furthermore, since both the elastic member and the protective pad have greater wear resistance than the moving contact bridge, the limiting structure results in relatively less impact wear and debris between them when restricting the movement of the elastic member.

[0015] In one embodiment, the protective pad includes a main board and a limiting structure. The limiting structure includes a limiting main board and multiple limiting sub-plates. The guide post passes through the limiting main board, and the multiple limiting sub-plates are disposed around the periphery of the limiting main board. One end of the limiting main board contacts the second surface of the moving contact bridge, and the other end of the limiting main board abuts against the elastic element. The multiple limiting sub-plates are arranged parallel to the axis of the guide post and extend away from the moving contact bridge. The multiple limiting sub-plates are used to restrict the elastic element from moving along the radial direction of the guide post.

[0016] In one embodiment, the limiting main board and the main board can be integrally formed. This can be understood as multiple limiting sub-plates being disposed on the side of the main board away from the moving contact bridge's second surface, and the multiple limiting sub-plates being evenly distributed around the axis of the guide post. The multiple limiting sub-plates can also wrap around the side of the elastic element that contacts the main board, preventing the elastic element from shifting radially along the guide post.

[0017] In one embodiment, the moving contact bridge assembly further includes a locking member located on one side of the first surface of the moving contact bridge. The locking member engages with one end of the guide post and restricts the axial position of the guide post, compressing the elastic element between the guide seat and the protective gasket. The locking member can be a snap ring. The locking member ensures that the elastic element is compressed after the moving contact bridge assembly is assembled. Specifically, by placing the elastic element between the protective gasket and the guide seat, and with the locking member engaging with the guide post, the elastic element can be pre-compressed after assembly, giving the moving contact bridge assembly initial pressure. When the moving contact and the stationary contact bridge come into contact, the elastic element is further compressed. At this point, as long as the total pressure generated by the elastic element is greater than the Holm electric repulsion force generated by the maximum current borne by the moving contact bridge assembly, the problem of the moving contact welding in the event of a short circuit is prevented.

[0018] In one embodiment, the elastic element includes at least one of a tower spring, a wave spring, or a rectangular spring. The tower spring, wave spring, or rectangular spring has a large compression stroke, which can provide sufficient rebound force to ensure that the total pressure generated by the elastic element is greater than the Holm electric repulsion force generated by the maximum current borne by the moving contact bridge assembly.

[0019] Secondly, this application also provides a relay, which includes a base, a magnetic mechanism assembly, a push rod assembly, one or more stationary contact bridge assemblies, and one or more moving contact bridge assemblies as described in any embodiment of the first aspect. The magnetic mechanism assembly is disposed on the base, and the push rod assembly is slidably disposed on the base along a first direction. The push rod assembly is fixedly connected to the output end of the magnetic mechanism assembly. The moving contact bridge assembly is fixed to the push rod assembly, and the stationary contact bridge assembly is fixed to the base. The magnetic mechanism assembly drives the push rod assembly to slide along the first direction, so that the moving contact in the one or more moving contact bridge assemblies contacts or separates from the stationary contact in the one or more stationary contact bridge assemblies. The output end has an insertion hole on the side facing the push rod assembly, and a connecting piece is disposed in the insertion hole and fixed to the insertion hole. The connecting piece is a metal part and is non-magnetic. The connecting piece can improve the strength of the output end of the magnetic mechanism assembly and prevent the output end of the magnetic mechanism assembly from breaking.

[0020] In one embodiment, the base has a first receiving cavity and a second receiving cavity communicating with the first receiving cavity. The magnetic mechanism assembly is disposed in the first receiving cavity, and the push rod assembly is slidably disposed in the second receiving cavity along a first direction. The stationary contact bridge assembly is fixed to the base, and the stationary contacts in the stationary contact bridge assembly correspond one-to-one with the moving contacts in the moving contact bridge assembly. When the relay is working, the magnetic mechanism assembly can drive the push rod assembly to slide along the first direction, so that the moving contacts in one or more moving contact bridge assemblies contact or separate from the stationary contacts in one or more stationary contact bridge assemblies, thereby switching the state of the relay. The first direction can be the arrangement direction of the first and second receiving cavities, and can be considered as the length direction of the relay.

[0021] In one embodiment, the moving contact bridge in the moving contact bridge assembly extends along a second direction, which is the height direction of the relay and intersects with the first direction. The height direction refers to the direction perpendicular to the mounting plane of the relay; specifically, the second direction can be a direction perpendicular to the bottom of the second receiving cavity. Extending the moving contact bridge along the second direction can reduce the width dimension of the relay. For example, when the relay is mounted on a circuit board, it can reduce the circuit board area occupied by the relay, thereby facilitating the placement of other components on the circuit board.

[0022] In one embodiment, the connecting piece is embedded in the embedding hole. The connecting piece has multiple annular grooves and multiple first through holes. The annular grooves are arranged circumferentially along the axis of the connecting piece, and the multiple annular grooves are spaced apart along the extending direction of the connecting piece. The multiple first through holes are also spaced apart along the extending direction of the connecting piece. Embedding the connecting piece in the embedding hole improves the stability of the connection between the connecting piece and the output terminal. The annular grooves and first through holes improve the bonding surface of the connecting piece and also improve the stability of the connection between the connecting piece and the output terminal. In addition, the surface of the connecting piece may have a printed pattern, which can also improve the bonding surface of the embedded metal part, thereby improving the stability of the connection between the connecting piece and the output terminal.

[0023] In one embodiment, the connecting piece further includes a first connecting hole, a second through hole is provided on the output end, and a third through hole is provided on the side of the push rod facing the output end. The third through hole communicates with the mounting hole, and the first connecting hole, the second through hole, and the third through hole are coaxially arranged. A riveting member passes through the first connecting hole, the second through hole, and the third through hole to connect the push rod, the output end, and the connecting piece.

[0024] In one embodiment, the push rod assembly includes a push rod with a plurality of first mounting cavities spaced apart along a first direction. Each first mounting cavity is used to mount the movable contact bridge assembly. The outer surface of the bent portion facing the first mounting cavity is a smooth curved surface or a flat surface. When the movable contact bridge assembly is mounted in the first mounting cavity, the bent portion will not scratch the first mounting cavity, thus preventing debris from being generated.

[0025] In one embodiment, both sides of the movable contact bridge are provided with protruding edges for abutting against the bent portion. The sidewall of the first mounting cavity has a protrusion that abuts against the bent portion in a first direction to limit the maximum compression of the elastic element. This embodiment can prevent the elastic element from being excessively compressed. The bent portion can prevent the protruding edges from directly contacting the sidewall of the first mounting cavity when the movable contact bridge assembly is installed in the first mounting cavity, thereby avoiding scraping between the movable contact bridge and the first mounting cavity to generate debris.

[0026] In one embodiment, there are multiple static contact bridge assemblies, multiple moving contact bridge assemblies, multiple first mounting cavities, and the push rod assembly further includes multiple central ribs. Each of the first mounting cavities is provided with a central rib, which is used to divide the first mounting cavity into two first sub-mounting cavities. Each first sub-mounting cavity is used to install a moving contact bridge assembly.

[0027] In one embodiment, the relay further includes a guide block; the push rod assembly is provided with at least one sliding guide portion. The sliding guide portion improves the stability of the sliding body during movement. The guide block is detachably mounted on the base, and has a first limiting groove. The base has a second limiting groove, the openings of the second limiting groove and the first limiting groove are opposite to each other along a second direction. The sliding guide portion is disposed between the first and second limiting grooves, which restrict the sliding guide portion to slide only between them. The first and second limiting grooves collect debris generated during friction between the sliding guide portion, the guide block, and the base, preventing debris from entering between the moving and stationary contacts.

[0028] In one embodiment, the magnetic mechanism assembly includes a main body, a first supporting column, a second supporting column, and a yoke. The first and second supporting columns are disposed opposite each other on both sides of the main body, and the axes of the first and second supporting columns coincide with the axis of the sliding guide. The yoke is disposed on the base, specifically in a first receiving cavity, and is used to enclose the main body. The yoke has a first positioning hole for the first supporting column and a second positioning hole for the second supporting column. In this configuration, the first supporting column, the second supporting column, and the sliding guide are coaxially arranged, which can prevent the impact internal stress from increasing and deteriorating due to misalignment. This ensures higher stability in the contact between the moving contact bridge assembly on the push rod and the stationary contact bridge on the base during the push rod's movement.

[0029] In one embodiment, the magnetic mechanism assembly further includes a first guide portion and a second guide portion. The first guide portion is disposed on the first support column, and the second guide portion is disposed on the second support column. The shape of the first positioning hole on the yoke matches the shape of the first support column with the first guide portion, and the shape of the second positioning hole on the yoke matches the shape of the second support column with the second guide portion, to prevent the first and second support columns from shifting. Thus, the arrangement of the first and second guide portions enables more precise positioning of the first and second support columns.

[0030] In one embodiment, the relay further includes multiple arc-extinguishing grid structures detachably mounted on the base. These grid structures are located on both sides of the second receiving cavity. The moving contact in the moving contact bridge assembly and the stationary contact in the stationary contact bridge assembly are located between two oppositely arranged arc-extinguishing grid structures. The arc-extinguishing grid structures are used to decompose and release inert gas upon heating. When an arc occurs between the stationary and moving contact bridge assemblies, the arc-extinguishing grid structures decompose and release inert gas upon heating to assist in arc extinguishing, thereby improving the stability of the relay operation.

[0031] In one embodiment, the relay further includes a plurality of magnet covers, each magnet cover for accommodating at least one arc-extinguishing magnet, with one arc-extinguishing magnet respectively disposed at each end of the moving contact bridge assembly along the second direction. The magnet covers can increase the creepage distance of the arc-extinguishing magnets, thereby improving the safety and reliability of the relay. In the second direction, a constant magnetic field can be formed between two arc-extinguishing magnets, and because the moving contact bridge assembly extends along the second direction, the spacing between the two arc-extinguishing magnets is relatively large, which can increase the arc-extinguishing space of each set of arc-extinguishing magnets.

[0032] In one embodiment, the relay further includes an auxiliary stationary spring assembly, which includes an auxiliary moving contact bridge and an auxiliary stationary contact bridge. The auxiliary moving contact bridge is connected to the output end of the magnetic mechanism assembly, and the auxiliary stationary contact bridge is fixed to the base. The magnetic mechanism assembly can drive the auxiliary moving contact bridge to move along a first direction, so that the auxiliary moving contact on the auxiliary moving contact bridge contacts or separates from the auxiliary stationary contact on the auxiliary stationary contact bridge. The movement position of the push rod assembly is determined by the contact or disconnection between the auxiliary moving contact and the auxiliary stationary contact.

[0033] Thirdly, this application also provides a power module, which includes a housing and a relay as described in any embodiment of the second aspect, the relay being disposed within the housing. This relay exhibits high operational stability; therefore, the power module incorporating this relay also possesses high stability.

[0034] Fourthly, this application also provides an electrical device that includes the relay described in any embodiment of the second aspect. The electrical device may be an energy storage cabinet, a charging pile, a switch cabinet, or a distribution cabinet, etc.

[0035] Fifthly, this application also provides a power supply system, including a first power input network, a second power input network, a power module, and an ICT device. The power module includes a relay as described in any embodiment of the second aspect. Both the first and second power input networks are connected to the input terminals of the power module. The ICT device is connected to the output terminals of the power module. Both the first and second power input networks are connected to the relays, and the ICT device is also connected to the output terminals of the relays. When the first power input network fails, the relays in the power module can quickly switch to the second power input network to power the ICT device. Similarly, when the second power input network fails, the relays in the power module can quickly switch to the first power input network to power the ICT device.

[0036] It is worth mentioning that the power supply system also includes a first transformer, a second transformer, a first distribution cabinet, and a second distribution cabinet. The first transformer connects the first power input network to the first distribution cabinet, and the first distribution cabinet connects to the power module to ensure that the first power input network can stably supply power to the power module. The second transformer connects the second power input network to the second distribution cabinet, and the second distribution cabinet connects to the power module to ensure that the second power input network can stably supply power to the power module. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the structure of the relay provided in an embodiment of this application;

[0038] Figure 2 is a schematic diagram of a relay base provided in an embodiment of this application;

[0039] Figure 3 is a schematic diagram of another structure of the base in the relay provided in the embodiment of this application;

[0040] Figure 4 is a schematic diagram of another structure of the base in the relay provided in the embodiment of this application;

[0041] Figure 5 is a cross-sectional view of a relay provided in an embodiment of this application;

[0042] Figure 6 is another cross-sectional view of the relay provided in the embodiment of this application;

[0043] Figure 7 is another cross-sectional view of the relay provided in the embodiment of this application;

[0044] Figure 8 is another cross-sectional view of the relay provided in the embodiment of this application;

[0045] Figure 9 is a partial structural schematic diagram of the relay provided in an embodiment of this application;

[0046] Figure 10 is a schematic diagram of the structure of the middle push rod assembly of the relay provided in the embodiment of this application;

[0047] Figure 11 is a schematic diagram of the structure of the guide block of the relay provided in the embodiment of this application;

[0048] Figure 12 is a schematic diagram of the structure of the magnetic mechanism assembly in the relay provided in the embodiment of this application;

[0049] Figure 13 is a schematic diagram of the structure of the connecting piece in the relay provided in the embodiment of this application;

[0050] Figure 14 is a schematic diagram of the arc-extinguishing grid structure of the relay provided in the embodiment of this application;

[0051] Figure 15 is a schematic diagram of the structure of the middle magnet cover and the arc-blowing magnet of the relay provided in the embodiment of this application;

[0052] Figure 16 is a schematic diagram of a moving contact bridge assembly of a relay provided in an embodiment of this application;

[0053] Figure 17 is a schematic diagram of another structure of the moving contact bridge assembly of the relay provided in the embodiment of this application;

[0054] Figure 18 is an exploded view of a moving contact bridge assembly of a relay provided in an embodiment of this application;

[0055] Figure 19 is another exploded view of the moving contact bridge assembly of the relay provided in the embodiment of this application;

[0056] Figure 20 is another exploded view of the moving contact bridge assembly of the relay provided in the embodiment of this application;

[0057] Figure 21 is a schematic diagram of a protective gasket in a moving contact bridge assembly provided in an embodiment of this application;

[0058] Figure 22 is a schematic diagram of another structure of the protective pad in the moving contact bridge assembly provided in the embodiment of this application;

[0059] Figure 23 is a schematic diagram of a limiting structure in a moving contact bridge assembly provided in an embodiment of this application;

[0060] Figure 24 is a schematic diagram of a structure of an elastic element in a moving contact bridge assembly provided in an embodiment of this application;

[0061] Figure 25 is a schematic diagram of a structure of an elastic element in a moving contact bridge assembly provided in an embodiment of this application;

[0062] Figure 26 is a schematic diagram of a structure of an elastic element in a moving contact bridge assembly provided in an embodiment of this application;

[0063] Figure 27 is a schematic diagram of a guide structure in a moving contact bridge assembly provided in an embodiment of this application;

[0064] Figure 28 is a schematic diagram of a guide structure in a moving contact bridge assembly provided in an embodiment of this application;

[0065] Figure 29 is a schematic diagram of a power supply system provided in an embodiment of this application.

[0066] Reference numerals: 1-Relay; 2-First power input network; 3-Second power input network; 4-Power module; 5-ICT equipment; 6-First distribution cabinet; 7-Second distribution cabinet; 10-Base; 11-First receiving cavity; 12-Second receiving cavity; 13-Guide block; 130-First limiting groove; 131-Snap-fit; 14-Second mounting cavity; 140-Clamping plate; 141-Exhaust hole; 15-Second limiting groove; 16-Guide block mounting groove; 17-Static contact bridge mounting groove; 18-Auxiliary static spring mounting groove; 19-Protruding rib; 2 0-Push rod assembly; 21-Push rod; 22-Sliding guide part; 220-Guide plate; 221-Guide shaft; 23-First mounting cavity; 230-First sub-mounting cavity; 231-First positioning groove; 232-Second positioning groove; 24-Middle rib plate; 25-Mounting hole; 26-Third through hole; 27-Slot; 30-Magnetic mechanism assembly; 31-Main body; 32-First load-bearing column; 320-Embedding hole; 321-Second through hole; 33-Second load-bearing column; 34-Connecting piece; 340-Annular groove; 341- 342-First connecting hole; 35-Yoke; 36-First guide part; 37-Second guide part; 40-Static contact bridge assembly; 41-Static contact bridge; 42-Static contact; 50-Moving contact bridge assembly; 51-Moving contact bridge; 510-Moving contact; 511-Protruding edge; 512-Reinforcing rib; 513-Fifth through hole; 52-Protective gasket; 520-Main board; 521-Bending part; 522-Allowing hole; 53-Guide structure; 530-Guide seat; 5300-Third positioning groove; 531-Guide post; 5310-Limiting post; 5311-Guide body; 5312-Locking groove; 54-Elastic element; 55-Locking element; 550-Notch; 56-Limiting structure; 560-Limiting main board; 561-Limiting sub-board; 562-Guide sleeve; 563-Fourth through hole; 60-Arc extinguishing grid structure; 61-Top plate; 62-Bottom plate; 63-Arc extinguishing grid; 64-Slot; 70-Arc blowing magnet; 80-Magnet cover; 81-Cavity; 90-Auxiliary static spring assembly; 91-Auxiliary static contact bridge; 92-Auxiliary moving contact bridge. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0068] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0069] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0070] The relay switches power states by moving a magnetic mechanism within the relay, causing the moving contact on the moving contact bridge assembly to contact or separate from the stationary contact on the stationary contact bridge assembly, thus switching the power state. The moving contact bridge assembly is typically housed within a push rod and includes a moving contact bridge and a compression spring. The compression spring is positioned between the moving contact bridge and the push rod. When the magnetic mechanism drives the moving contact bridge assembly, the moving contact bridge directly applies a force to the compression spring, compressing it. During compression, the compression spring experiences sliding friction with the moving contact bridge. Since the compression spring has greater wear resistance than the moving contact bridge, the side of the moving contact bridge in contact with the compression surface will rub off debris, reducing the safety of the moving contact bridge assembly. Therefore, this application provides a new moving contact bridge assembly, as well as a relay, power module, electrical device, and power supply system incorporating this moving contact bridge assembly to solve the aforementioned technical problems.

[0071] Figure 1 is a schematic diagram of the structure of the relay provided in an embodiment of this application. In Figure 1, the X direction is the length direction of the relay, that is, the arrangement direction of the first and second receiving cavities, which can also be understood as the first direction; the Y direction is the width direction of the relay, that is, the third direction; and the Z direction is the height direction of the relay, which refers to the direction perpendicular to the mounting plane of the relay, or it can be the direction perpendicular to the base of the second receiving cavity, that is, the second direction. Figure 2 is a schematic diagram of one structure of the base of the relay provided in an embodiment of this application; Figure 3 is a schematic diagram of another structure of the base of the relay provided in an embodiment of this application; Figure 4 is a schematic diagram of another structure of the base of the relay provided in an embodiment of this application; Figure 5 is a cross-sectional view of the relay provided in an embodiment of this application; Figure 6 is another cross-sectional view of the relay provided in an embodiment of this application; Figure 7 is another cross-sectional view of the relay provided in an embodiment of this application; Figure 8 is another cross-sectional view of the relay provided in an embodiment of this application; and Figure 9 is a partial structural schematic diagram of the relay provided in an embodiment of this application. Referring to Figures 1 to 9, an embodiment of this application provides a relay 1. The relay 1 includes a base 10 and a push rod assembly 20, a magnetic mechanism assembly 30, one or more stationary contact bridge assemblies 40, one or more moving contact bridge assemblies 50, and auxiliary contacts 90 disposed in the base 10. The following description uses multiple stationary contact bridge assemblies 40 and moving contact bridge assemblies 50 as examples. The base has a first receiving cavity 11, a second receiving cavity 12, and an auxiliary stationary spring mounting groove 18, with the first receiving cavity 11 and the second receiving cavity 12 connected. The auxiliary stationary spring assembly 90 includes an auxiliary moving contact bridge 92 and an auxiliary stationary contact bridge 91. The auxiliary moving contact bridge 92 is disposed at the output end of the magnetic mechanism assembly 30, and the auxiliary stationary contact bridge 91 is fixed to the base 10 via the auxiliary stationary spring mounting groove 18. The magnetic mechanism assembly 30 drives the auxiliary moving contact bridge 92 to move along a first direction, so that the auxiliary moving contact on the auxiliary moving contact bridge 92 contacts or separates from the auxiliary stationary contact on the auxiliary stationary contact bridge 91, thereby determining the movement position of the push rod assembly 20. A magnetic mechanism assembly 30 is disposed in a first receiving cavity 11, and a push rod assembly 20 is slidably disposed in a second receiving cavity 12 along a first direction. The push rod assembly 20 is fixedly connected to the output end of the magnetic mechanism assembly 30. A moving contact bridge assembly 50 is fixed to the push rod assembly 20 along a second direction, and a stationary contact bridge assembly 40 is detachably disposed on a base 10. Multiple stationary contact bridge assemblies 40 are arranged in a one-to-one correspondence with multiple moving contact bridge assemblies 50. When the relay 1 is working, the magnetic mechanism assembly 30 drives the push rod assembly 20 to slide along the first direction, causing the multiple moving contact bridge assemblies 50 to contact or separate from the multiple stationary contact bridge assemblies 40, thereby switching different input states of the relay. Specifically, when multiple stationary contact bridge assemblies 40 correspond one-to-one with multiple moving contact bridge assemblies 50, the moving contact 510 in the moving contact bridge assembly 50 is arranged in a one-to-one correspondence with the stationary contact 42 in the stationary contact bridge assembly 40.When relay 1 is activated, the magnetic mechanism assembly 30 drives the push rod assembly 20 to slide along a first direction, causing the moving contacts 510 in the plurality of moving contact bridge assemblies 50 to contact or separate from the stationary contacts 42 in the plurality of stationary contact bridge assemblies 40, thereby switching different input states of the relay. The output end of the magnetic mechanism assembly 30 has an insertion hole 320 on the side facing the push rod assembly 20. A connecting piece 34 is disposed in the insertion hole 320 and fixed therein. The connecting piece 34 is a metal part and is not magnetic. The connecting piece 34 in the insertion hole 320 increases the strength of the output end of the magnetic mechanism assembly 30 and prevents breakage of the output end.

[0072] The magnetic mechanism assembly 30 can drive the push rod assembly 20 to reciprocate along the first direction. During the movement of the push rod assembly 20, the moving contact 510 in the moving contact bridge assembly 50 provided on the push rod assembly 20 contacts or separates from the stationary contact 42 in the stationary contact bridge assembly 40.

[0073] The base 10 has multiple protruding ribs 19 at its bottom, which can be connected to the circuit board to fix the relay 1 to the circuit board. The plane of the circuit board is the mounting plane of the relay, which can reduce the space occupied by the circuit board when the relay 1 is connected to the circuit board.

[0074] Figure 10 is a schematic diagram of the structure of the push rod assembly of the relay provided in this application embodiment. Referring to Figures 1, 2, 5-8 and 10, the push rod assembly 20 includes a push rod 21, and the push rod 21 includes a plurality of first mounting cavities 23. The plurality of first mounting cavities 23 are spaced apart along a first direction. When the push rod assembly 20 is disposed in the base 10, each first mounting cavity 23 is provided with a central rib plate 24, which divides the first mounting cavity 23 into two first sub-mounting cavities 230. Each first sub-mounting cavity 230 is equipped with a moving contact bridge assembly 50. When the push rod 21 is disposed in the second receiving cavity 12, the plurality of first sub-mounting cavities 230 penetrate the push rod 21 along a second direction, and the moving contact bridge assembly 50 is disposed in each first sub-mounting cavity 230 along the second direction. In this way, the size of the relay along a third direction (i.e., the width direction of the relay) can be reduced. The number of first mounting cavities 23 on the push rod 21 can be one, two, or three, etc. Specifically, taking the push rod 21 with two first mounting cavities 23 as an example, when the push rod 21 includes two first mounting cavities 23, the two central rib plates 24 divide the two first mounting cavities 23 into four first sub-mounting cavities 230. At this time, there are four moving contact bridge assemblies 50, which are slidably inserted into the four first sub-mounting cavities 230 along the second direction, and each moving contact bridge assembly 50 is fixed in one first sub-mounting cavity 230. At this time, there are also four stationary contact bridge assemblies, each of which includes two stationary contact bridges 41, and each stationary contact bridge 41 is provided with a stationary contact point 42, so that one moving contact point 510 on each moving contact bridge 51 corresponds one-to-one with one stationary contact point 42 on each stationary contact bridge 41. The base 10 is provided with a plurality of stationary contact bridge mounting slots 17 for mounting stationary contact bridge assemblies 40. The plurality of stationary contact bridge mounting slots 17 are spaced apart along a first direction. After the stationary contact bridge assembly 40 is installed on the base 10, the stationary contacts 42 on the two stationary contact bridges 41 included in each stationary contact bridge assembly 40 are arranged along the first direction with the moving contacts 510 in the moving contact bridge assembly 50. In the first direction, two sets of stationary contact bridge assemblies 40 are provided in a first mounting cavity 23. The two stationary contact bridge assemblies 40 are located on both sides of a first mounting cavity 23. When the moving contact bridge assembly 50 located on the side of the first mounting cavity 23 away from the magnetic mechanism assembly 30 contacts a stationary contact bridge assembly 40, and the moving contact bridge assembly 50 located on the side of the first mounting cavity 23 closer to the magnetic mechanism assembly 30 separates from a stationary contact bridge assembly 40, the first power supply input network is connected to the relay. When the moving contact bridge assembly 50 located on the side of the magnetic mechanism assembly 30 in the first mounting cavity 23 comes into contact with a stationary contact bridge assembly 40, and the moving contact bridge assembly 50 located on the side of the first mounting cavity 23 away from the magnetic mechanism assembly 30 separates from the stationary contact bridge assembly 40, the relay switches to access the second power supply input network.

[0075] In two first sub-mounting cavities 230 separated by a central rib plate 24, each first sub-mounting cavity 230 has a first positioning groove 231 on the side closer to the other first sub-mounting cavity 230 and a second positioning groove 232 on the side farther from the other first sub-mounting cavity 230. The first positioning groove 231 and the second positioning groove 232 are used to restrict the movement of the moving contact bridge assembly 50 in the first sub-mounting cavity 230 along a third direction, that is, the first positioning groove 231 and the second positioning groove 232 are used to restrict the movement of the moving contact bridge assembly 50 in the first sub-mounting cavity 230 along a third direction (i.e., the width direction of the relay). It can also prevent the moving contact bridge assembly 50 from interfering with the push rod 21, so as to ensure that the moving contact bridge assembly 50 can be stably installed in each first sub-mounting cavity 230. The first positioning groove 231 and the second positioning groove 232 are both provided with reinforcing ribs. The reinforcing ribs are used to ensure that when the moving contact bridge assembly 50 is installed in the first sub-mounting cavity 230, the moving contact bridge assembly 50 and the first sub-mounting cavity 230 are interference-fitted, thereby improving the stability of the moving contact bridge assembly 50 in the push rod 21.

[0076] When the movable contact bridge assembly 50 is installed in the first sub-mounting cavity 230, the protruding edges on both sides of the movable contact bridge abut against the bent portions provided on the protective gasket. The surface of the bent portion facing the side wall of the first mounting cavity is a smooth curved surface or a flat surface. When the smooth curved surface or flat surface contacts the side wall of the first sub-mounting cavity, it will not scratch the side wall of the first sub-mounting cavity 230. In addition, in the first direction, the bent portion also abuts against the side wall of the first sub-mounting cavity 230. When the movable contact bridge assembly 50 is subjected to compressive force, since the side wall of the first sub-mounting cavity 230 is stepped, that is, the side wall of the first sub-mounting cavity 230 has a protrusion, the protrusion is used to abut against the bent portion to limit the maximum compression of the elastic element. This ensures that the movable contact bridge assembly 50 can be compressed and also ensures that the elastic element in the movable contact bridge assembly 50 is not over-compressed.

[0077] A mounting hole 25 is provided on the side of the push rod 21 facing the magnetic mechanism assembly 30. The mounting hole 25 extends along a first direction, and the output end of the magnetic mechanism assembly 30 is disposed in the mounting hole 25. To improve the stability of the connection between the output end of the magnetic mechanism assembly 30 and the push rod 21, multiple reinforcing ribs are also provided in the mounting hole 25. The reinforcing ribs extend along the length direction of the push rod 21, and the arrangement of the reinforcing ribs ensures an interference fit between the push rod 21 and the output end of the magnetic mechanism assembly 30. In addition, adhesive can be filled between the push rod 21 and the output end of the electromagnetic front drive structure 30 to prevent relative movement between the push rod 21 and the output end of the magnetic mechanism assembly 30.

[0078] At least one slot 27 is provided on both sides of the push rod 21. The slot 27 can reduce the deformation of the push rod 21 during the injection molding process due to uneven wall thickness of different parts of the push rod 21.

[0079] The push rod 21 is also provided with a sliding guide portion 22, which is disposed between two adjacent first mounting cavities 23. When there is only one first mounting cavity 23 or only two moving contact bridge assemblies 50 are provided, the sliding guide portion 22 can be disposed on the side of the first mounting cavity 23 away from the magnetic mechanism assembly 30. The sliding guide portion includes a guide plate 220 and a guide shaft 221. The guide shaft 221 is disposed on the guide plate 220 and protrudes from the guide plate 220 along a second direction. More specifically, the guide shaft 221 is located in the middle of the guide plate 220, and the axis of the guide shaft 221 is parallel to the first direction. Figure 11 is a schematic diagram of the structure of the guide block in the relay provided in the embodiment of this application. Referring to Figures 2, 8, 10 and 11, the relay 1 in this application also includes a guide block 13. A guide block mounting groove 16 is provided on the base 10. The guide block 13 is detachably disposed in the guide block mounting groove 16 of the base 10. The guide block 13 has a first limiting groove 130. The base 10 is provided with a second limiting groove 15. The first limiting groove 130 and the second limiting groove 15 are arranged opposite to each other along the second direction, and the openings of the first limiting groove 130 and the second limiting groove 15 are arranged opposite to each other along the second direction. There is a gap between the first limiting groove 130 and the second limiting groove 15. The sliding guide part 22 is arranged between the first limiting groove 130 and the second limiting groove 15. The first limiting groove 130 and the second limiting groove 15 are used to restrict the sliding guide part 22 to slide only between the first limiting groove 130 and the second limiting groove 15. Specifically, during the movement of the push rod 21, the guide plate 220 and the parts of the guide block 13 and the base 10 used to form the second limiting groove 15 will generate relative friction. The debris generated by the friction between the guide plate 220 and the guide block 13 and the base 10 will fall into the space formed by the first limiting groove 130 and the second limiting groove 15, thereby reducing the probability of debris entering between the stationary contact 42 and the moving contact 510, and preventing problems such as overheating and non-conductivity between the stationary contact 42 and the moving contact 510 due to poor contact caused by debris.

[0080] In addition, the guide block 13 and the second limiting groove 15 can also position the push rod 21 by limiting the sliding guide part 22, so as to prevent the push rod 21 from being misaligned when the stationary contact 42 and the moving contact 510 make contact due to angular deviation during the movement, which would affect the service life of the relay. In addition, both sides of the guide block 13 are provided with buckles 131, and the guide block 13 is detachably connected to the guide block mounting groove 16 on the base 10 through the buckles 131.

[0081] Referring again to Figure 9, the stationary contact bridge assembly 40 includes a stationary contact bridge 41 and a stationary contact 42. The stationary contact bridge 41 is L-shaped, which reduces the space occupied by the stationary contact bridge assembly 40 along the second direction of the base 10 when it is installed in the base 10, i.e., reduces the space occupied along the height direction of the base 10. It also reduces the length of the stationary contact bridge 41 extending beyond the bottom of the base 10, simplifying the connection between the relay 1 and the circuit board.

[0082] Figure 12 is a schematic diagram of the structure of the magnetic mechanism assembly in the relay provided in the embodiment of this application. Referring to Figures 2, 5 to 8 and Figure 12, the magnetic mechanism assembly 30 includes a main body 31, a first load-bearing column 32, a second load-bearing column 33 and a yoke 35. The first load-bearing column 32 and the second load-bearing column 33 are disposed opposite to each other on both sides of the main body 31, and the axes of the first load-bearing column 32 and the second load-bearing column 33 coincide. The yoke 35 is disposed in the first receiving cavity 11 and encloses the main body 31. In the first direction, the yoke 35 is provided with a first positioning hole (not shown in the figure) and a second positioning hole (not shown in the figure). The first positioning hole cooperates with the first support column 32 and the second positioning hole cooperates with the second support column 33 to form a precise positioning. Then, the sliding guide 22 is coarsely positioned by the first limiting groove 130 and the second limiting groove 15 to ensure that when the magnetic mechanism assembly 30 drives the push rod 21, the axis of the push rod 21 is coaxial with the first support column 32 and the second support column 33, preventing the push rod 21 from being eccentric during the movement, thereby improving the stability of the contact between the stationary contact and the moving contact. In addition, the axis of the first support column 32 also coincides with the axis of the sliding guide, that is, the axes of the first support column 32, the second support column 33 and the sliding guide coincide, which can further ensure the coaxiality of the magnetic mechanism assembly when driving the push rod and improve the stability of the relay operation.

[0083] The magnetic mechanism assembly 30 also includes a first guide portion 36 and a second guide portion 37, which are disposed on both sides of the main body 31. The first guide portion 36 is mounted on the first load-bearing column 32 and is also connected to the main body 31. The second guide portion 37 is mounted on the second load-bearing column 33 and is also connected to the main body 31. The first guide portion 36 may include two T-shaped guide plates, which are disposed on both sides of the first load-bearing column 32 in a second direction. Both the two T-shaped guide plates and the first load-bearing column 32 are positioned through a first positioning hole. The structure of the second guide portion 37 may be the same as that of the first guide portion, or the shape of the guide plates included in the second guide portion may be the same as that of the guide plates included in the first guide portion 36. No further limitations are imposed here, as long as the first guide portion 36 and the second guide portion 37 can guide the first load-bearing column 32 and the second load-bearing column 33.

[0084] In the above embodiment, the embedding hole 320 can be understood as being located on one side of the first load-bearing column 32, and a connecting piece 34 can be provided in the embedding hole 320, with the connecting piece 34 fixedly disposed in the embedding hole 320. The connecting piece 34 is made of a non-magnetic material, specifically austenitic stainless steel. While increasing the strength of the first load-bearing column 32, the connecting piece 34 does not affect the magnetic field distribution of the magnetic mechanism assembly 30. Furthermore, the connection piece 34 can improve the resistance of the first load-bearing column 32 to transient impact forces, preventing the first load-bearing column 32 from breaking.

[0085] Figure 13 is a schematic diagram of the structure of the connecting piece in the relay provided in this application embodiment. Referring to Figures 5-8, 10, 12, and 13, the connecting piece 34 is a shaft structure extending along a first direction. Multiple annular grooves 340 are provided on the outer surface of the connecting piece 34. The annular grooves 340 are arranged circumferentially along the axis of the connecting piece, and the multiple annular grooves 340 are spaced apart along the extension direction (first direction) of the connecting piece 34. The annular grooves 340 improve the bonding strength between the connecting piece 34 and the inner wall of the first load-bearing column 32, thereby improving the resistance to millimeter-level transient physical impacts at the connection between the magnetic mechanism assembly 30 and the push rod assembly 20. Furthermore, the number of annular grooves 340 can be adjusted according to the strength requirements of the connecting piece 34. The depth of each annular groove 340 can be the same or different. The dimensions of each annular groove 340 along the extension direction of the connecting piece can also be adjusted according to actual needs. It is worth mentioning that the outer surface of the connecting piece 34 may have a printed pattern, that is, the outer surface of the connecting piece 34 may be made uneven to improve the surface roughness of the connecting piece 34 and make the contact surface between the connecting piece 34 and the embedded hole 320 on the first load-bearing column 32 larger.

[0086] The connecting piece may also include a plurality of first through holes 341, which are spaced apart along the extending direction of the connecting piece 34. The plurality of first through holes 341 may be of the same size and penetrate the connecting piece 34 along a third direction. The arrangement of the first through holes 341 can also increase the bonding strength between the connecting piece 34 and the inner wall of the first load-bearing column 32.

[0087] The connecting piece 34 has a first connecting hole 342 on the side facing the push rod 21, and the first supporting column 32 has a second through hole 321 on the side facing the push rod 21. When the connecting piece 34 is placed in the insertion hole 320 of the first supporting column 32, the first connecting hole 342 and the second through hole 321 are coaxially arranged. The push rod 21 has a third through hole 26 on the side facing the first supporting column 32. When the first supporting column 32 is placed in the mounting hole 25, the first connecting hole 342, the second through hole 321, and the third through hole 26 are coaxially arranged. Rivets pass through the third through hole 26, the second through hole 321, and the first connecting hole 342 to fix the push rod 21, the first supporting column 32, and the connecting piece 34 together. Then, glue is used to fix the push rod 21 to the first supporting column 32 and the connecting piece 34 together to prevent the connection between the first supporting column 32 and the push rod 21 from breaking during movement and impact.

[0088] Figure 14 is a schematic diagram of the arc-extinguishing grid structure of the relay provided in this embodiment. Referring to Figures 5-8 and Figure 14, the relay 1 further includes multiple arc-extinguishing grid structures 60, and a plurality of second mounting cavities 14 are provided on the base, each second mounting cavity 14 for mounting one arc-extinguishing grid structure 60. In the third direction (i.e., the width direction of the relay 1), the arc-extinguishing grid structures 60 are located on both sides of the second receiving cavity 12, and the moving contact 510 in the moving contact bridge assembly 50 and the stationary contact 42 in the stationary contact bridge assembly 40 are located between two oppositely arranged arc-extinguishing grid structures 60. The arc-extinguishing grid structure 60 is detachably mounted in the base 10 through the second mounting cavity 14, and the arc-extinguishing grid structure 60 is interference-fitted with the second mounting cavity 14. When an arc is generated between the stationary contact bridge assembly 40 and the moving contact bridge assembly 50, the arc-extinguishing grid structure 60 will be heated and decomposed to release inert gas to assist in arc extinguishing, thereby improving the stability of the relay operation. Referring to Figures 3 and 4, the bottom of the second mounting cavity 14 is provided with an exhaust hole 141, which is used to discharge the gas in the second mounting cavity 14.

[0089] Specifically, the arc-extinguishing grid structure 60 may include a top plate 61, a bottom plate 62, and a plurality of arc-extinguishing grids 63 disposed between the top plate 61 and the bottom plate 62. Both the top plate 61 and the bottom plate 62 are provided with slots 64, which can cooperate with a retaining plate 140 disposed in the second mounting cavity 14, allowing the arc-extinguishing grid structure 60 to be detachably disposed in the second mounting cavity 14. The detachable placement of the arc-extinguishing grid structure 60 in the second mounting cavity 14 facilitates the measurement of data such as the contact resistance between the stationary contact 42 and the moving contact 510, and the pressure of the stationary contact bridge assembly 40 and the moving contact bridge assembly 50 within the second mounting cavity 14.

[0090] Figure 15 is a schematic diagram of the structure of the middle magnet cover and the arc-blowing magnet of the relay provided in the embodiment of this application. Referring to Figures 1, 5-8, 14 and 15, the relay 1 may further include multiple sets of arc-blowing magnets, wherein the number of sets of arc-blowing magnets 70 is the same as the number of moving contact bridge assemblies. Each set of arc-blowing magnets includes two arc-blowing magnets 70, which are disposed on the base 10 along the second direction. A moving contact bridge assembly 50 and a corresponding stationary contact bridge assembly 40 are disposed between the two arc-blowing magnets 70. It can be understood that, in the second direction, an arc-blowing magnet 70 is disposed above and below the moving contact bridge assembly 50 and the corresponding stationary contact bridge assembly 40. The moving contact bridge assembly 50 extends along the second direction, and a constant magnetic field can be formed between the two arc-blowing magnets 70 in each set of arc-blowing magnets. The spacing between the two arc-blowing magnets 70 in each set of arc-blowing magnets is relatively large, which can improve the arc-extinguishing space of each set of arc-blowing magnets.

[0091] The relay 1 also includes multiple magnet covers 80, which are disposed on both sides of the base 10 along a second direction. Each magnet cover 80 has a cavity 81 that can accommodate at least one arc-blowing magnet 70. It can be understood that by adding a magnet cover 80 to the outside of the arc-blowing magnet 70, the creepage distance between adjacent arc-blowing magnets 70 along the first direction can be increased, thereby improving the safety and reliability of the relay 1. The magnet covers 80 are made of plastic, and each magnet cover 80 has two arc-blowing magnets 70, which are fixed to the magnet cover 80 with adhesive.

[0092] Figure 16 is a schematic diagram of one structure of the moving contact bridge assembly of the relay provided in an embodiment of this application; Figure 17 is a schematic diagram of another structure of the moving contact bridge assembly of the relay provided in an embodiment of this application; Figure 18 is an exploded view of one moving contact bridge assembly of the relay provided in an embodiment of this application; Figure 19 is an exploded view of another moving contact bridge assembly of the relay provided in an embodiment of this application; Figure 20 is an exploded view of another moving contact bridge assembly of the relay provided in an embodiment of this application. Referring to Figures 2, 16 to 20, in the above embodiments, the moving contact bridge assembly 50 includes a moving contact bridge 51, a protective pad 52, and an elastic member 54. The moving contact bridge 51 has a first surface and a second surface disposed opposite to each other. A moving contact 510 is disposed on the moving contact bridge 51, one end of which protrudes from the first surface of the moving contact bridge 51 to facilitate contact between the moving contact 510 and the stationary contact. The protective pad 52 is disposed on one side of the second surface of the moving contact bridge 51, wherein the wear resistance of the protective pad 52 and the elastic member 54 is greater than the wear resistance of the moving contact bridge 51. The elastic element 54 is disposed on the side of the protective pad 52 away from the second surface of the moving contact bridge 51 and is used to abut against the protective pad 52. When the moving contact bridge assembly 50 is subjected to a high-speed impact, the protective pad 52 and the moving contact bridge 51 remain relatively fixed, and no friction occurs between the protective pad 52 and the moving contact bridge 51. The protective pad 52 does not cause frictional shedding from the moving contact bridge 51. In addition, the protective pad 52 is disposed between the elastic element 54 and the moving contact bridge 51, and the elastic element 54 abuts against the protective pad 52, resulting in less relative friction between the protective pad 52 and the elastic element 54. The wear resistance of both the protective pad 52 and the elastic element 54 is greater than that of the moving contact bridge 51. Wear resistance refers to the wear resistance performance of the material, generally expressed by wear amount or wear index. The impact wear and / or friction generated between the elastic element 54 and the protective pad 52 produce relatively less debris, thereby improving the safety of the relay. In addition, the protective pad 52 can also prevent the moving contact bridge 51 from being worn by the elastic element 54 during operation, thus ensuring the stability of the moving contact bridge assembly 50.

[0093] It is worth mentioning that the material of the moving contact bridge can be, but is not limited to, copper, silver, copper alloy, or silver alloy. The material of the protective gasket can be, but is not limited to, stainless steel or aluminum alloy. The material of the elastic element 54 can be SUS631 stainless steel, which is a high-strength, corrosion-resistant stainless steel.

[0094] The moving contact bridge assembly 50 also includes a guide structure 53, which includes a guide seat 530 and a guide post 531. One end of the guide post 531 is fixedly mounted on the guide seat 530, and the other end of the guide post 531 passes through the protective gasket 52 and the moving contact bridge 51, and is fixed to one side of the first surface of the moving contact bridge 51. An elastic element 54 passes through the guide post 531, with one end of the elastic element 54 abutting against the protective gasket 52 and the other end of the elastic element 54 abutting against the guide seat 530. The guide post 531 makes it easier to position the elastic element 54 between the guide seat 530 and the protective gasket 52, and the guide post 531 can also limit the movement of the elastic element 54.

[0095] The moving contact bridge 51 can have two moving contacts 510, which are spaced apart along the extending direction of the moving contact bridge 51. When the moving contact bridge assembly 50 is used in a relay, the extending direction of the moving contact bridge 51 is a second direction. In some embodiments, the other end of the moving contact 510 protrudes from the second surface of the moving contact bridge 51. The protective gasket 52 is provided with two clearance holes 522, each clearance hole 522 corresponding to one moving contact 510. In the projection of the moving contact bridge 51 or the protective gasket 52, the guide structure 53 is located at the center between the two moving contacts 510. The elastic member 54 is sleeved on the guide post 531, and the elastic member 54 is located between the guide seat 530 and the protective gasket 52. When the other end of the moving contact 510 protrudes from the second surface of the moving contact bridge 51, the protective gasket 52 may not be provided at the corresponding location of the moving contact 510.

[0096] The movable contact bridge 51 is provided with two movable contacts 510, which are located at both ends of the movable contact bridge 51. The movable contact bridge 51 is provided with a first limiting hole for installing the movable contact. The clearance hole 522 provided on the protective pad 52 is coaxially arranged with the first limiting hole. The movable contact 510 is riveted to the movable contact bridge 51 and the protective pad 52 connected by the first limiting hole and the clearance hole 522.

[0097] Figure 21 is a schematic diagram of one structure of the protective gasket in the moving contact bridge assembly provided in this application embodiment; Figure 22 is a schematic diagram of another structure of the protective gasket in the moving contact bridge assembly provided in this application embodiment. Referring to Figures 2, 16-22, the protective gasket 52 includes a main board 520 and bent portions 521 disposed on both sides of the main board 520. The main board 520 is used to fit against the second surface of the moving contact bridge 51. The bent portions 521 extend from both sides of the moving contact bridge 51 to one side of the first surface. The two sides are used to connect the first surface and the second surface to fix the moving contact bridge and the protective gasket relatively. Specifically, the bent portions 521 can be U-shaped. One end of the bent portion 521 is connected to the side of the main board 520, and the other end of the bent portion 521 is away from the main board 520 along the thickness direction of the main board 520. The moving contact bridge 51 is located inside the bent portion 521. When the moving contact bridge assembly 50 passes through the first sub-mounting cavity of the sliding body 21, the moving contact bridge 51 is protected by the bending portion 521 on the main board 520, which can prevent the moving contact bridge 51 from sliding and rubbing against the inner wall of the push rod 21, thus preventing plastic chips from falling off. The number of bending portions 521 on each side of the main board 520 can be one, two, or three.

[0098] To improve the stability of the connection between the moving contact bridge 51 and the protective pad 52, both sides of the moving contact bridge 51 can be provided with protruding edges 511. The protruding edges 511 can abut against the bent part 521 to prevent the moving contact bridge 51 and the protective pad 52 from moving.

[0099] A limiting structure 56 is provided on the side of the protective gasket 52 opposite to the second surface of the moving contact bridge 51. The limiting structure 56 is used to limit the movement of the elastic member 54 along the plane of the protective gasket 52, so as to reduce the deviation of the elastic member 54 during compression. In addition, since the wear resistance of both the elastic member 54 and the protective gasket 52 is greater than that of the moving contact bridge 51, the impact wear and debris between the two are relatively less when the limiting structure 56 restricts the movement of the elastic member 54.

[0100] Figure 23 is a schematic diagram of a limiting structure in the moving contact bridge assembly provided in this application embodiment. Referring to Figures 16-23, the protective gasket may include a main board 520 and a limiting structure 56. The limiting structure 56 may include a limiting main board 560 and multiple limiting sub-boards 561. One end of the limiting main board 560 passes through the protective gasket 52 and contacts the second surface of the moving contact bridge 51, while the other end of the limiting main board 560 is used to abut against the elastic member 54. The guide post 531 can pass through the limiting main board 560 and the moving contact bridge 51. The multiple limiting sub-boards 561 are disposed on the periphery of the limiting main board 560, and the limiting sub-boards 561 can be arranged parallel to the axis of the guide post 531. The setting of the limiting sub-boards 561 can prevent the elastic member 54 from moving along the radial direction of the guide post 531. The limiting main board 560 may be provided with a fourth through hole 563, which can penetrate the limiting main board 560 along its thickness direction to allow the guide post 531 to pass through it. Correspondingly, the moving contact bridge 51 is also provided with a fifth through hole 513 corresponding to the fourth through hole 563, so that the guide post 531 passes through the limiting main board 560 and then through the moving contact bridge 51.

[0101] In addition, the limiting structure 56 may also include a guide sleeve 562. The guide sleeve 562 is located on the side of the limiting main plate 560 away from the limiting sub-plate 561. The guide sleeve 562 passes through the fifth through hole, and the axis of the guide sleeve 562 coincides with the axis of the fourth through hole. The guide sleeve 562 can prevent the guide post 531 from rubbing against the moving contact bridge 51 when the guide post 531 passes through the moving contact bridge 51, thereby reducing the influence of the guide post 531 on the moving contact bridge 51.

[0102] Continuing with Figure 22, the limiting main plate 560 (not labeled in the figure) and the main plate 520 are integrally formed. This can be understood as multiple limiting sub-plates 561 being positioned on the side of the protective pad 52 away from the moving contact bridge 51, and these multiple limiting sub-plates 561 are evenly distributed around the axis of the guide post 531. All the multiple limiting sub-plates 561 extend away from the moving contact bridge 51 to restrict the movement of the elastic element 54 along the radial direction of the guide post 531.

[0103] In the above embodiments, the movable contact bridge 51 may also be provided with a reinforcing rib 512. The reinforcing rib 512 is provided on the first surface of the movable contact bridge 51 and extends along the length direction of the movable contact bridge 51. The reinforcing rib 512 is used to increase the bending resistance of the movable contact bridge 51.

[0104] In the above embodiments, the moving contact bridge assembly 50 further includes a locking member 55, which is located on one side of the first surface of the moving contact bridge 51. The locking member 55 is used to cooperate with one end of the guide post 531 and to limit the axial position of the guide post 531 so that the elastic member 54 is compressed between the guide seat 530 and the protective gasket 52. When the elastic member 54 is positioned between the protective gasket 52 and the guide seat 530, the locking member 55 cooperates with the guide post 531 to ensure that the elastic member 54 can be pre-compressed after the moving contact bridge assembly 50 is assembled, giving the moving contact bridge assembly 50 initial pressure. When the moving contact in the moving contact bridge assembly 50 contacts the stationary contact bridge in the stationary contact bridge assembly 40, the elastic member 54 is further compressed. At this time, as long as the total pressure generated by the elastic member 54 is greater than the Holm electric repulsion force generated by the maximum current borne by the moving contact bridge assembly 50, the problem of welding of the moving contact in the case of a short circuit is prevented.

[0105] Figure 24 is a schematic diagram of one structure of the elastic element in the moving contact bridge assembly provided in this application embodiment; Figure 25 is a schematic diagram of one structure of the elastic element in the moving contact bridge assembly provided in this application embodiment; Figure 26 is a schematic diagram of one structure of the elastic element in the moving contact bridge assembly provided in this application embodiment. Referring to Figures 16-20 and 24-26, the elastic element 54 can specifically be one of a tower spring, a wave spring, or a moment spring. A moment spring has higher and more stable stiffness, can provide a larger and more stable force value, and has a longer service life, enabling long-term stable use. In addition, the compression of a moment spring is also larger, allowing for a larger stroke of the moving contact bridge assembly 50. Figure 27 is a schematic diagram of one structure of the guide structure in the moving contact bridge assembly provided in this application embodiment. Referring to Figure 27, when the elastic element 54 is a rectangular spring, the guide post 531 includes a guide body 5311 and a limiting post 5310. One end of the limiting post 5310 is fixedly connected to the guide seat 530, and the other end of the limiting post 5310 is connected to the guide body 5311. The limiting post 5310 and the guide body 5311 are coaxially arranged. The outer diameter of the limiting post 5310 is larger than the outer diameter of the guide body 5311, and the outer diameter of the limiting post 5310 is slightly smaller than the inner diameter of the rectangular spring. The limiting post 5310 is used to limit the rectangular spring when it is sleeved on the guide post 531, so that the rectangular spring moves along the radial direction of the guide post 531. A locking groove 5312 is provided at the end of the guide body 5311 away from the limiting post 5310. The locking groove 5312 is an annular groove along the circumference of the guide body 5311. When the guide post 531 passes through the moving contact bridge 51, the locking member 55 cooperates with the locking groove 5312 to fix the position of the guide post 531. In addition, the side of the guide seat 530 facing the protective pad can be flat to improve the stability of the cooperation between the guide seat 530 and the torque spring.

[0106] The tower spring has a narrow opening at one end and a wide opening at the other, with a smaller diameter at the narrow end and a larger diameter at the wide end. The spring constant changes continuously during compression. Figure 28 is a schematic diagram of a guide structure in the moving contact bridge assembly provided in this application embodiment. Referring to Figure 27, when the elastic element 54 is a tower spring, the guide seat 530 facing the protective pad can be provided with a third positioning groove 5300 for accommodating the narrow end of the tower spring. Placing the narrow end of the tower spring on one side of the guide seat 530 reduces the size of the guide seat 530. The protective pad, used to protect the moving contact bridge, is relatively large compared to the guide seat 530. Furthermore, the compression amount along the height direction of the tower spring can be greater during compression. A locking groove 5312 is provided at the end of the guide post 531 away from the guide seat 530. The locking groove 5312 is an annular groove along the circumference of the guide post 531. When the guide post 531 passes through the moving contact bridge 51, the locking member 55 cooperates with the locking groove 5312 to fix the position of the guide post 531. The locking member 55 is a snap ring with a notch 550, which engages with the locking groove 5312 of the guide post 531. Under the elastic force of the elastic member 54, one end of the locking member 55 abuts against the moving contact bridge 51, and the other end abuts against the side wall of the locking groove 5312 of the guide post 531 to limit the amount of rebound of the elastic member 54.

[0107] A wave spring, also known as a waveform spring, is an elastic element with several peaks and valleys on a thin metal ring. Wave springs have a compact structure and require less installation space under the same parameters. They also have a wide range of stiffness, and the stiffness can be changed by adjusting the height, width, and thickness of the peaks as needed.

[0108] A rectangular spring, also known as a rectangular spring, is a type of spring made from a material with a rectangular cross-section. Rectangular springs have a much greater force than ordinary springs because their rectangular cross-section design allows them to more effectively resist deformation under stress. In mechanical equipment requiring precise control and adjustment of elasticity, rectangular springs provide a stable force output. Specifically, in the rectangular cross-section of a rectangular spring, the shorter sides are arranged along the axis of the spring, allowing for a larger amount of compression during the compression process.

[0109] The stiffness coefficient of tower springs, wave springs, or rectangular springs can gradually increase with the increase of compression. In the initial stage, tower springs, wave springs, or rectangular springs have low sensitivity to compression error. The initial preload of the moving contact can be controlled by the precise preload of the moving contact assembly, and the elastic force output to the contact is more stable. This helps to solve the problem of inconsistent contact holding force caused by compression tolerance. During the working compression stage, the stiffness coefficient of the elastic element is large, providing greater support reaction force and effectively suppressing the bounce problem when the contact collides.

[0110] In one optimal method, the spring is a tower spring. During the compression process, the coils of the tower spring can be in the same plane, and the compression of the tower spring is the largest, which can provide a greater support force and effectively suppress the bounce problem when the contacts collide.

[0111] In the above embodiment, when the movable contact bridge assembly 50 is slidably disposed in the push rod 21, the guide seat 530 is located in the first positioning groove 231, and the end of the guide post 531 passing through the movable contact bridge 51 is located in the second positioning groove 232. The arrangement of the first positioning groove 231 and the second positioning groove 232 can ensure the stability of the movable contact bridge assembly 50 disposed in the push rod 21. During the process of the movable contact bridge assembly 50 being disposed in the push rod 21, the bent portion 521 in the movable contact bridge assembly 50 can also contact the first sub-mounting cavity 230 to prevent friction between the movable contact bridge 51 and the push rod 21. The surface of the bent portion 521 is smooth, which can reduce the amount of debris generated by friction with the push rod 21.

[0112] In addition, since the space of the first sub-mounting cavity 230 is small, when the moving contact bridge assembly 50 is placed in the first sub-mounting cavity 230, the elastic member 54 will be subjected to initial pressure to ensure that the initial pressure of the moving contact bridge assembly is greater than the Holm electric repulsion force generated by the moving contact bridge assembly bearing the specified maximum current, so as to prevent contact welding problems in short circuit scenarios.

[0113] It is worth mentioning that the various parts of the moving contact bridge assembly can be assembled before being installed in the push rod, which simplifies the assembly process.

[0114] This application also provides a power module, which includes a housing and a relay as described in any of the above technical solutions, the relay being disposed within the housing. This relay offers high operational stability; therefore, a power module incorporating this relay also exhibits high stability.

[0115] This application also provides an electrical device that includes a relay as described in any of the above-mentioned technical solutions. The electrical device can be an energy storage cabinet, charging pile, switch cabinet, or distribution cabinet, etc.

[0116] Figure 29 is a schematic diagram of a power supply system provided in an embodiment of this application. Referring to Figure 29, the power supply system can be used to power information and communications technology (ICT) equipment. ICT equipment can be, but is not limited to, computing devices, communication devices, network devices, testing and measurement devices, software and application software, multimedia devices, network devices, or data center devices. Computing devices can be of various types, such as desktop computers, servers, tablets, or smartphones, which are used to process and store data. Communication devices can be of various types, such as routers, switches, modems, base station equipment, or optical modules, which are used to establish and maintain network connections and realize data transmission. Network devices can include various hardware used to build local area networks (LANs) and wide area networks (WANs), such as wireless access points, bridges, or gateways. Testing and measurement devices can be automated online testing instruments used to inspect the quality and function of printed circuit board components during electronic manufacturing. Software and application software can include operating systems, database management systems, enterprise resource planning (ERP) software, or customer relationship management (CRM) software, which support information management and business process automation. Multimedia devices can be of various types, such as cameras, microphones, displays, or audio systems, used to create, edit, and play multimedia content. Networking devices can be of various types, such as sensors, smart meters, or smart home devices, used to collect data and communicate with other systems. Data center devices can be of various types, such as storage devices, backup power supplies, or cooling systems, used to maintain the operation of the data center. The following explanation uses a power supply system for ICT devices as an example. The power supply system includes a first power input network 2, a second power input network 3, a power module 4, and ICT devices 5. The power module 4 includes a relay 1 as described in any of the above technical solutions. Both the first power input network 2 and the second power input network 3 are connected to the input terminals of the power module 4. The ICT devices 5 are connected to the output terminals of the power module. Both the first power input network 2 and the second power input network 3 are connected to the relay 1, and the ICT devices 5 are also connected to the output terminals of the relay 1. When the first power input network 2 loses power, the relay 1 in the power module 4 can quickly switch to the second power input network 3 to power the ICT devices. Similarly, when the second power input network 3 loses power, the relay 1 in the power module 4 can quickly switch to the first power input network 2 to supply power to the ICT equipment.

[0117] It is worth mentioning that the power supply system also includes a first transformer, a second transformer, a first distribution cabinet 6, and a second distribution cabinet 7. The first transformer connects the first power input network 2 to the first distribution cabinet 6, and the first distribution cabinet 6 is connected to the power module 4 to ensure that the first power input network 2 can stably supply power to the power module 4. The second transformer connects the second power input network 3 to the second distribution cabinet 7, and the second distribution cabinet 7 is connected to the power module 4 to ensure that the second power input network 3 can stably supply power to the power module 4.

[0118] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope and intent of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and variations.

Claims

1. A moving contact bridge assembly, characterized in that, include: A movable contact bridge has a first surface and a second surface disposed opposite to each other, and a movable contact is provided on the movable contact bridge, one end of which protrudes from the first surface of the movable contact bridge; A protective gasket, the protective gasket being fixed to one side of the second surface of the moving contact bridge; An elastic element is disposed on the side of the protective pad away from the second surface of the moving contact bridge and is used to abut against the protective pad, wherein: The wear resistance of the protective pad and the elastic element is greater than that of the moving contact bridge.

2. The moving contact bridge assembly as described in claim 1, characterized in that, The moving contact bridge assembly further includes a guide structure, which includes a guide seat and a guide post; one end of the guide post is fixed to the guide seat; the other end of the guide post passes through the protective pad and the moving contact bridge, and is fixed to one side of the first surface of the moving contact bridge. The elastic element is sleeved on the guide post, and the side of the elastic element away from the protective pad abuts against the guide seat.

3. The moving contact bridge assembly as described in claim 2, characterized in that, The protective pad includes a main board and bent portions disposed on both sides of the main board; the main board is attached to the second surface of the moving contact bridge; the bent portions extend from both sides of the moving contact bridge to one side of the first surface to fix the moving contact bridge and the protective pad relative to each other; the two sides are the sides connecting the first surface and the second surface.

4. The moving contact bridge assembly as described in any one of claims 1 to 3, characterized in that, A limiting structure is provided on the side of the protective pad away from the second surface of the moving contact bridge. The limiting structure is used to restrict the movement of the elastic element within the plane of the protective pad.

5. The moving contact bridge assembly as described in claim 4, characterized in that, The protective pad includes a main board and the limiting structure. The limiting structure includes a limiting main board and multiple limiting sub-plates. The guide post passes through the limiting main board, and the elastic member abuts against the limiting main board. The multiple limiting sub-plates are disposed on the periphery of the limiting main board to restrict the movement of the elastic member along the radial direction of the guide post.

6. The moving contact bridge assembly as described in claim 5, characterized in that, The limiting motherboard and the motherboard are integrally formed.

7. The moving contact bridge assembly as described in any one of claims 2 to 6, characterized in that, The moving contact bridge assembly further includes a locking member located on one side of the first surface of the moving contact bridge and fixed to the other end of the guide post. The locking member is used to limit the axial position of the guide post so that the elastic element is compressed between the guide seat and the protective gasket.

8. The moving contact bridge assembly according to any one of claims 1 to 7, characterized in that, The elastic element includes at least one of a tower spring, a wave spring, or a moment spring.

9. The moving contact bridge assembly according to any one of claims 1 to 8, characterized in that, The material of the moving contact bridge includes at least one of copper, silver, copper alloy, or silver alloy; and / or The protective gasket is made of at least one of stainless steel or aluminum alloy; and / or The elastic element is made of stainless steel.

10. A relay, characterized in that, include: The system comprises a base, a magnetic mechanism assembly, a push rod assembly, one or more stationary contact bridge assemblies, and one or more moving contact bridge assemblies as described in any one of claims 1 to 9. The magnetic mechanism assembly is disposed on the base, the push rod assembly is slidably disposed on the base along a first direction, the push rod assembly is fixedly connected to the output end of the magnetic mechanism assembly, the moving contact bridge assembly is fixed to the push rod assembly, the stationary contact bridge assembly is fixed to the base, the magnetic mechanism assembly is used to drive the push rod assembly to slide along the first direction so that the moving contact in the one or more moving contact bridge assemblies contacts or separates from the stationary contact in the one or more stationary contact bridge assemblies, and the output end has an embedding hole on the side facing the push rod assembly, a connecting piece is disposed in the embedding hole, and the connecting piece is fixed to the embedding hole; wherein the connecting piece is a metal part and is not magnetic.

11. The relay as claimed in claim 10, characterized in that, The moving contact bridge assembly extends along a second direction, which is the height direction of the relay and intersects with the first direction.

12. The relay as claimed in claim 11, characterized in that, The connecting piece is embedded in the embedding hole. The connecting piece has multiple annular grooves and multiple first through holes. The annular grooves are arranged circumferentially along the axis of the connecting piece, and the multiple annular grooves are spaced apart along the extension direction of the connecting piece. The plurality of first through holes are spaced apart along the extension direction of the connecting piece.

13. The relay as described in claim 11 or 12, characterized in that, The connecting piece further includes a first connecting hole, a second through hole is provided on the output end, and a third through hole is provided on the side of the push rod assembly facing the output end. The first connecting hole, the second through hole and the third through hole are coaxially arranged.

14. The relay according to any one of claims 10 to 13, characterized in that, The push rod assembly includes one or more first mounting cavities for mounting the moving contact bridge assembly; the outer surface of the bent portion facing the first mounting cavity is a smooth curved surface or a plane.

15. The relay as claimed in claim 14, characterized in that, Both sides of the moving contact bridge are provided with protruding edges, which are used to abut against the bent portion; The sidewall of the first mounting cavity has a protrusion; along the first direction, the protrusion is used to abut against the bend to limit the maximum compression of the elastic element.

16. The relay as described in any one of claims 10-15, characterized in that, The relay further includes a guide block; the push rod assembly is provided with at least one sliding guide portion; The guide block is detachably disposed on the base. The guide block has a first limiting groove, and the base has a second limiting groove. The opening of the second limiting groove and the opening of the first limiting groove are disposed opposite to each other along a second direction. The sliding guide part is disposed between the first limiting groove and the second limiting groove. The first limiting groove and the second limiting groove are used to restrict the sliding guide part to slide only between the first limiting groove and the second limiting groove.

17. The relay as claimed in claim 16, characterized in that, The magnetic mechanism assembly includes a main body, a first load-bearing column, a second load-bearing column, and a yoke. The first load-bearing column and the second load-bearing column are disposed opposite each other on both sides of the main body, and the axis of the first load-bearing column, the axis of the second load-bearing column, and the axis of the sliding guide are coincident. The yoke is disposed on the base and is used to wrap the main body. The yoke is provided with a first positioning hole for the first load-bearing column to pass through and a second positioning hole for the second load-bearing column to pass through.

18. The relay according to any one of claims 10 to 17, characterized in that, The relay also includes multiple arc-extinguishing grid structures, which are detachably mounted on the base and located on both sides of the base. The arc-extinguishing grid structures are used to decompose into inert gas when heated.

19. The relay according to any one of claims 10 to 18, characterized in that, The relay also includes a plurality of magnet covers, each magnet cover being used to accommodate at least one arc-blowing magnet, and one of the arc-blowing magnets is respectively disposed at each end of the moving contact bridge assembly along the second direction.

20. The relay according to any one of claims 10 to 19, characterized in that, The relay also includes an auxiliary stationary spring assembly, which includes an auxiliary moving contact bridge and an auxiliary stationary contact bridge. The auxiliary moving contact bridge is disposed at the output end of the magnetic mechanism assembly, and the auxiliary stationary contact bridge is fixed to the base. The magnetic mechanism assembly drives the auxiliary moving contact bridge to move along a first direction so that the auxiliary moving contact on the auxiliary moving contact bridge contacts or separates from the auxiliary stationary contact on the auxiliary stationary contact bridge, thereby determining the movement position of the push rod assembly.

21. A power supply module, characterized in that, It includes a housing and a relay as described in any one of claims 10 to 20, wherein the relay is disposed within the housing.

22. An electrical device, characterized in that, Including the relay as described in any one of claims 10 to 20.

23. A power supply system, characterized in that, include: The power supply includes a first power input network, a second power input network, an ICT device, and a power module as described in claim 21, wherein the first power input network and the second power input network are both connected to the input terminal of the relay in the power module, and the ICT device is connected to the output terminal of the relay in the power module.

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