Magnetic quenching type electromagnetic relay

Abstract

The utility model discloses a magnetic quenching type electromagnetic relay, which comprises a shell, a coil rack arranged in the shell, a yoke arranged on the coil rack, an armature connected with the yoke, a movable contact spring which is arranged on the armature and is provided with a movable contact, and two static contacts which are arranged in the shell and are positioned on two sides of the movable contact, a magnetic block and a magnet assembly are arranged in the shell and located on the two sides of the static contact respectively, the magnet assembly comprises a magnet frame and a plurality of stacked magnetic sheets, the magnet frame is inserted into the shell and provided with a containing space, and each magnetic sheet is located in the containing space. According to the utility model, the structure design is reasonable, the two sides of the two static contacts are provided with the magnetic blocks and the magnet assemblies, the generated electric arc can be well attracted and lengthened to be extinguished, and the arc extinguishing effect is better.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and more specifically, to a magnetic blowout arc-extinguishing electromagnetic relay. Background Technology

[0002] Existing technology CN217983139U discloses a magnetic blowout arc-extinguishing relay, comprising: a housing and a frame placed inside the housing, an armature and a yoke disposed on the frame, and an iron core corresponding to the yoke disposed on the frame, the armature and the yoke being connected by a moving spring, a stationary contact disposed on the frame, and a moving contact cooperating with the stationary contact being disposed at one end of the moving spring, forming a contact area between the stationary contact and the moving contact; a magnet disposed on the frame, the magnet interacting with the contact area to extinguish the arc in the contact area. This utility model of a magnetic blowout arc-extinguishing relay can protect the relay, has a simple internal structure, and a reasonable overall structure.

[0003] The relay with the above structure achieves the function of magnetic blowout arc extinguishing by using a magnet set on the frame. Its drawback is that it only uses one magnet to attract the arc spark generated when the moving contact and the stationary contact come into contact, resulting in poor arc ignition effect and incompatibility with arc extinguishing of multiple stationary contacts. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art. Its structure is reasonably designed. By setting magnetic blocks and magnetic components on both sides of the two stationary contacts, it can effectively attract and elongate the generated electric arc to extinguish it, resulting in a better arc extinguishing effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A magnetic blowout arc-extinguishing electromagnetic relay includes a housing, a coil frame disposed within the housing, a yoke disposed on the coil frame, an armature connected to the yoke, a movable spring plate mounted on the armature and having a movable contact, and two stationary contacts disposed within the housing and located on both sides of the movable contact. Magnetic blocks and magnet assemblies are respectively disposed on both sides of the stationary contacts within the housing. The magnet assembly includes a magnet frame and multiple stacked magnetic sheets. The magnet frame is inserted into the housing and has an accommodating space, with each magnetic sheet located within the accommodating space.

[0007] By adopting the above technical solution, magnetic blocks and magnet assemblies are arranged inside the housing. Specifically, the housing includes a base and an outer cover, with the magnetic blocks and magnet assemblies mounted on the base. The magnet assembly includes a non-magnetic magnet frame, which can be made of plastic, primarily for housing and mounting magnetic sheets. By stacking multiple magnets, the overall magnetism of the magnet assembly is enhanced. The arrangement of the magnetic sheets and blocks creates a magnetic field on both sides of the stationary contact. When the moving contact disconnects from the two stationary contacts, the generated arc is elongated due to the force of the magnetic field, thus extinguishing the arc. By using different numbers of magnetic sheets, the magnetic field force can be altered, thereby meeting the arc-extinguishing requirements of circuits with different voltages and currents.

[0008] Preferably, the housing is provided with a socket for inserting a magnetic block and a slot for inserting a magnetic sheet.

[0009] By adopting the above technical solution, the sockets and slots are specifically set on the base. During installation, the magnetic blocks and magnetic sheets are inserted into the sockets and slots respectively, thereby achieving the installation and positioning of the magnetic blocks and magnetic sheets.

[0010] Preferably, the magnet holder has two prongs inserted into the housing and a crossbar connecting the two prongs, and the housing has a slot on one side of the slot for inserting the prongs.

[0011] By adopting the above technical solution, the magnet frame is positioned and installed by inserting the pins into the slots. The crossbar is designed to create a space between the crossbar and the two pins, thus providing installation space for the magnet.

[0012] Preferably, the magnetic block and the magnetic sheet are arranged facing each other, with the magnetic block located on the side of one stationary contact away from the moving contact, and the magnetic sheet located on the side of the other stationary contact away from the moving contact.

[0013] By adopting the above technical solution, the magnetic block and magnetic sheet are arranged facing each other. Here, the magnetic sheet refers to a whole of multiple magnetic sheets after being stacked and installed. The magnetic block and magnetic sheet are respectively located on one side of the two stationary contacts. This can ensure the formation of magnetic field force between the magnetic block and magnetic sheet, so that the generated electric arc can be successfully extinguished.

[0014] Preferably, the housing is provided with an exhaust hole at the position corresponding to the magnet frame, and the exhaust holes are arranged along the height direction of the magnet frame.

[0015] By adopting the above technical solution, multiple exhaust holes are set along the height direction of the outer cover, which can discharge the small electric arc generated inside the shell and formed by the magnetic field between the magnetic block and the magnetic sheet, which is stretched and difficult to maintain before breaking.

[0016] Preferably, the coil frame includes a skeleton, an iron core disposed within the skeleton, and a coil wound on the iron core. A spring connects the armature and the yoke, and a movable spring is mounted on the armature via a connecting block, with the movable spring located in the connecting block.

[0017] By adopting the above technical solution, after the coil is energized, the armature will be attracted by the iron core, which will cause the moving spring to swing, thereby realizing the contact or disconnection between the moving spring and the two stationary contacts. The connecting block is connected to the armature, and the moving spring is installed in the connecting block, thus realizing the linkage between the moving spring and the armature. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0019] Figure 2 This utility model provides a schematic diagram of the internal structure of the shell;

[0020] Figure 3 This utility model provides a specific embodiment that reflects the structural diagram of the base;

[0021] Figure 4 This utility model presents a specific embodiment illustrating the structure of the armature and the movable spring.

[0022] In the diagram: 1. Shell; 11. Base; 12. Outer cover; 13. Socket; 14. Slot; 15. Groove; 16. Vent; 2. Coil frame; 21. Yoke; 22. Armature; 23. Frame; 24. Core; 25. Coil; 26. Spring; 27. Connecting block; 3. Moving spring; 31. Moving contact; 4. Stationary contact; 5. Magnetic block; 6. Magnet assembly; 7. Magnet frame; 71. Accommodation space; 72. Pin; 73. Crossbar; 8. Magnetic sheet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4As shown, a magnetic blowout arc-extinguishing electromagnetic relay includes a housing 1, a coil frame 2 disposed within the housing 1, a yoke 21 disposed on the coil frame 2, an armature 22 connected to the yoke 21, a movable spring 3 mounted on the armature 22 and having a movable contact 31, and two stationary contacts 4 disposed within the housing 1 and located on both sides of the movable contact 31. Magnetic blocks 5 and magnet assemblies 6 are respectively disposed on both sides of the stationary contacts 4 within the housing 1. The magnet assembly 6 includes a magnet frame 7 and multiple stacked magnetic sheets 8. The magnet frame 7 is inserted into the housing 1 and has an accommodating space 71, with each magnetic sheet 8 located within the accommodating space 71.

[0025] By adopting the above technical solution, magnetic blocks 5 and magnet assemblies 6 are arranged inside the housing 1. The housing 1 specifically includes a base 11 and an outer cover 12, and the magnetic blocks 5 and magnet assemblies 6 are arranged on the base 11. The magnet assembly 6 includes a non-magnetic magnet frame 7, which can be made of plastic and is mainly used to accommodate and install the magnetic sheets 8. By stacking multiple magnets, the overall magnetism of the magnet assembly 6 can be enhanced. Through the arrangement of the magnetic sheets 8 and magnetic blocks 5, a magnetic field can be formed on both sides of the stationary contact 4. When the moving contact 31 is disconnected from the two stationary contacts 4, the generated arc will be elongated due to the force of the magnetic field, thus playing a role in arc extinguishing. By setting different numbers of magnetic sheets 8, the magnetic field force can be changed, thereby meeting the arc extinguishing requirements of circuits with different voltages and currents.

[0026] The housing 1 is provided with a socket 13 for inserting a magnetic block 5 and a slot 14 for inserting a magnetic sheet 8. The socket 13 and the slot 14 are specifically set on the base 11. During installation, the magnetic block 5 and the magnetic sheet 8 are respectively inserted into the socket 13 and the slot 14 to achieve the installation and positioning of the magnetic block 5 and the magnetic sheet 8.

[0027] The magnet holder 7 has two prongs 72 inserted into the housing 1 and a crossbar 73 connecting the two prongs 72. The housing 1 has a slot 15 on one side of the slot 14 for the prongs 72 to be inserted. The magnet holder 7 is positioned and installed by inserting the prongs 72 into the slot 15. The crossbar 73 forms an accommodating space 71 between the crossbar 73 and the two prongs 72, thus providing installation space for the magnetic sheet 8.

[0028] Furthermore, the magnetic block 5 and the magnetic sheet 8 are arranged facing each other. The magnetic block 5 is located on the side of one of the stationary contacts 4 away from the moving contact 31, and the magnetic sheet 8 is located on the side of the other stationary contact 4 away from the moving contact 31. The magnetic block 5 and the magnetic sheet 8 are arranged facing each other. Here, the magnetic sheet 8 refers to the whole of multiple magnetic sheets 8 after being stacked and installed. The magnetic block 5 and the magnetic sheet 8 are respectively located on one side of the two stationary contacts 4. This can ensure the formation of magnetic field force between the magnetic block 5 and the magnetic sheet 8, so that the generated electric arc can be successfully extinguished.

[0029] Furthermore, an exhaust port 16 is provided on the housing 1 at the position corresponding to the magnet frame 7, and the exhaust ports 16 are arranged along the height direction of the magnet frame 7. Multiple exhaust ports 16 are arranged along the height direction of the outer cover 12, which can discharge the small electric arc generated inside the housing 1 and formed by the magnetic field between the magnetic block 5 and the magnetic sheet 8, which is stretched and difficult to maintain and then breaks off.

[0030] Additionally, the coil frame 2 includes a skeleton 23, an iron core 24 disposed within the skeleton 23, and a coil 25 wound around the iron core 24. A spring 26 connects the armature 22 and the yoke 21. A movable spring 3 is mounted on the armature 22 via a connecting block 27, and the movable spring 3 is located within the connecting block 27. When the coil 25 is energized, the armature 22 is attracted by the iron core 24, causing the movable spring 3 to swing, thereby enabling the movable spring 3 to contact or disconnect from the two stationary contacts 4. The connecting block 27 is connected to the armature 22, and the movable spring 3 is mounted within the connecting block 27, thus achieving linkage between the movable spring 3 and the armature 22.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A magnetic blowout arc-extinguishing electromagnetic relay, comprising a housing (1), a coil frame (2) disposed within the housing (1), a yoke (21) disposed on the coil frame (2), an armature (22) connected to the yoke (21), a movable spring (3) mounted on the armature (22) and having a movable contact (31), and two stationary contacts (4) disposed within the housing (1) and located on both sides of the movable contact (31), characterized in that, Inside the housing (1), on both sides of the stationary contact (4), there are magnetic blocks (5) and magnet assemblies (6). The magnet assembly (6) includes a magnet frame (7) and multiple stacked magnetic sheets (8). The magnet frame (7) is inserted into the housing (1) and has a receiving space (71). Each magnetic sheet (8) is located in the receiving space (71).

2. The magnetic blowout arc-extinguishing electromagnetic relay according to claim 1, characterized in that, The housing (1) is provided with a socket (13) for inserting a magnetic block (5) and a slot (14) for inserting a magnetic sheet (8).

3. The magnetic blowout arc-extinguishing electromagnetic relay according to claim 2, characterized in that, The magnet holder (7) has two pins (72) inserted into the housing (1) and a crossbar (73) connecting the two pins (72). The housing (1) has a slot (15) on one side of the slot (14) for the pins (72) to be inserted.

4. A magnetic blowout arc-extinguishing electromagnetic relay according to claim 1, 2, or 3, characterized in that, The magnetic block (5) and the magnetic sheet (8) are arranged opposite each other. The magnetic block (5) is located on one side of the stationary contact (4) away from the moving contact (31), and the magnetic sheet (8) is located on the other side of the stationary contact (4) away from the moving contact (31).

5. A magnetic blowout arc-extinguishing electromagnetic relay according to claim 4, characterized in that, An exhaust hole (16) is provided on the housing (1) at the position corresponding to the magnet frame (7), and the exhaust hole (16) is arranged along the height direction of the magnet frame (7).

6. A magnetic blowout arc-extinguishing electromagnetic relay according to claim 5, characterized in that, The coil frame (2) includes a frame (23), an iron core (24) located in the frame (23), and a coil (25) wound on the iron core (24). A spring (26) is connected between the armature (22) and the yoke (21). A movable spring (3) is mounted on the armature (22) through a connecting block (27). The movable spring (3) is located in the connecting block (27).

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