Electromagnetic system and direct current switch

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses an electromagnetic system and a direct-current switch. The electromagnetic system comprises a static iron core. The at least two groups of electromagnetic driving units are arranged on the static iron core; the first end of the connecting column is connected with the static iron core, and the second end of the connecting column penetrates through the electromagnetic driving unit and extends out; the magnet yoke sheet is connected with the second end of the connecting column; one end of the elastic piece is embedded in the magnet yoke piece; and one end, far away from the magnet yoke piece, of the elastic piece is embedded in the movable iron core. According to the utility model, the lower end of the movable iron core is not additionally provided with a guide part, so that the overall mass of the movable iron core is reduced, the driving current required by the electromagnetic driving unit is reduced, and the electromagnetic system can be directly started by adopting a PLC (Programmable Logic Controller).

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to an electromagnetic system and a direct current switch. Background Art

[0002] In the prior art, such as the electromagnetic system and DC switch with application number CN219958886U, the moving iron core includes a connecting part and two driving parts arranged on both sides of the connecting part, the two driving parts are respectively provided with an insertion part, the insertion part is equipped with a guide, and two reaction springs are respectively sleeved on the outer side of the guide of the insertion part of the driving part connected to each other. The coil and the static iron core are respectively used to drive the moving iron core to overcome the force of the two reaction springs to achieve movement.

[0003] Since an insertion portion is provided on the moving iron core, the overall mass of the moving iron core is larger, and the upward elastic force generated by the reaction spring increases. In order to realize the downward attraction of the coil on the moving iron core, the current flowing through the coil can only be increased. However, the current directly transmitted by the PLC controller is small, resulting in the inability to use the PLC controller to directly start the double-coil magnetic system. Utility Model Content

[0004] The utility model aims to provide an electromagnetic system and a DC switch, wherein the moving iron core has an overall lightweight design, reduces the driving current required for the coil, and satisfies the requirement of directly starting the electromagnetic system using a PLC controller.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Electromagnetic system, including:

[0007] Static iron core;

[0008] Electromagnetic drive units, at least two groups of the electromagnetic drive units are arranged on the static iron core;

[0009] There are at least two connecting columns, the first ends of which are connected to the static iron core, and the second ends of which pass through the corresponding electromagnetic drive unit and extend out;

[0010] There are at least two yoke pieces, and the yoke pieces are connected to the second ends of the corresponding connecting posts;

[0011] Moving iron core;

[0012] There are at least two elastic members, one end of each of which is embedded in the corresponding yoke sheet, and the other end of each of which is embedded in the moving iron core.

[0013] As an optional solution for the electromagnetic system, a positioning hole is provided on the side of the yoke piece facing the moving iron core, a positioning groove is provided on the side of the moving iron core facing the yoke piece, one end of the elastic member is embedded in the positioning hole, and the other end of the elastic member is embedded in the positioning groove.

[0014] As an optional solution for the electromagnetic system, the electromagnetic drive unit includes a coil frame and enameled wire, the coil frame includes a first plate, a winding tube and a second plate, the first plate and the second plate are respectively arranged at opposite ends of the winding tube, the enameled wire is wound around the outer wall of the winding tube, the connecting column is passed through the winding tube, the first plate is in contact with the static iron core, the second plate is provided with a rib, the side wall of the rib is provided with a first limiting portion, the side wall of the yoke piece is provided with a second limiting portion, and the first limiting portion is clamped with the second limiting portion.

[0015] As an optional solution for the electromagnetic system, one of the first limiting portion and the second limiting portion is a limiting groove, and the other of the first limiting portion and the second limiting portion is a limiting rib, and the limiting rib is engaged with the limiting groove.

[0016] As an optional solution for the electromagnetic system, a side wall of the first plate is provided with a wire groove, and the connection terminal of the enameled wire is passed through the wire groove.

[0017] As an optional solution for the electromagnetic system, at least one supporting column is provided at the lower end of the first plate.

[0018] As an optional solution for the electromagnetic system, a polygonal cavity is provided inside the winding tube, the connecting post matches the shape of the polygonal cavity, and the connecting post is stopped in the polygonal cavity.

[0019] As an optional solution for the electromagnetic system, a first connecting hole is provided on the yoke sheet, a second connecting hole is provided at the second end of the connecting column, and a fastener can pass through the first connecting hole and connect with the second connecting hole.

[0020] As an optional solution for the electromagnetic system, a side wall of the static iron core is provided with a limit slot, and the first end of the connecting column is engaged with the limit slot.

[0021] A DC switch comprises a protective shell and the technical solution of the electromagnetic system as described above, wherein the electromagnetic system is arranged in the protective shell.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The electromagnetic system provided by the utility model is provided with at least two groups of electromagnetic drive units on the static iron core, the first end of the connecting column is connected to the static iron core, the second end of the connecting column is connected to the yoke sheet after passing through the electromagnetic drive unit, and the opposite ends of the elastic member are respectively embedded in the moving iron core and the yoke sheet. Since no guide part is added to the lower end of the moving iron core, the overall mass of the moving iron core is reduced, and the driving current required by the electromagnetic drive unit is reduced. When the PLC controller controls the electromagnetic drive unit to be powered on, a magnetic circuit is generated in the electromagnetic drive unit and a magnetic attraction force is generated. The magnetic attraction force can attract the moving iron core to move downward, and finally close the moving iron core and the yoke sheet, and compress the elastic member, meeting the requirement of directly starting the electromagnetic system with the PLC controller. Since the opposite ends of the elastic member are respectively embedded in the moving iron core and the yoke sheet, the stability of the connection between the three is guaranteed. When the PLC controller controls the electromagnetic drive unit to be powered off, the magnetic attraction force in the electromagnetic drive unit disappears, the elastic member is released, and the moving iron core is separated from the yoke sheet and reset under the action of the elastic member.

[0024] The DC switch provided by the utility model can meet the requirements of an electromagnetic system that directly starts the DC switch using a PLC controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the electromagnetic system in the embodiment of the utility model;

[0026] Figure 2 is a cross-sectional view of an electromagnetic system in an embodiment of the utility model;

[0027] Figure 3 It is an exploded schematic diagram of the electromagnetic system in the embodiment of the utility model.

[0028] In the figure:

[0029] 1. Static iron core; 2. Enameled wire; 3. Coil skeleton; 4. Yoke; 5. Connecting column; 6. Elastic part; 7. Moving iron core; 8. Fasteners;

[0030] 11. Limiting card slot;

[0031] 31. first plate; 32. winding tube; 33. second plate; 34. retaining edge; 35. first limiting part; 36. wire groove; 37. support column; 38. polygonal cavity;

[0032] 41. positioning hole; 42. second limiting portion; 43. first connecting hole;

[0033] 51. Second connecting hole;

[0034] 71. Positioning groove. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] In order to design the overall lightweight moving iron core, reduce the driving current required by the coil, and meet the requirements of directly starting the electromagnetic system with a PLC controller, this embodiment provides an electromagnetic system and a DC switch. Figures 1 to 3 The specific contents of this embodiment are described in detail.

[0040] like Figure 1 , Figure 2 Combination Figure 3As shown, the electromagnetic system includes a static iron core 1, a moving iron core 7, at least two groups of electromagnetic drive units, at least two connecting columns 5, at least two yoke sheets 4 and at least two elastic members 6. By way of example, the static iron core 1 and the moving iron core 7 in this embodiment are both flat plate structures. At least two groups of electromagnetic drive units are arranged on the static iron core 1. The first end of the connecting column 5 is connected to the static iron core 1, and the second end of the connecting column 5 is passed through and extends out of the corresponding electromagnetic drive unit. The yoke sheet 4 is connected to the second end of the corresponding connecting column 5. One end of the elastic member 6 is embedded in the corresponding yoke sheet 4, and the other end of the elastic member 6 is embedded in the moving iron core 7. In actual use, the moving iron core 7 is connected and fixed to the contact support of the switch by screws or clamps.

[0041] In short, the electromagnetic system provided by the utility model is provided with at least two groups of electromagnetic drive units on the static iron core 1, the first end of the connecting column 5 is connected to the static iron core 1, the second end of the connecting column 5 is connected to the yoke sheet 4 after passing through the electromagnetic drive unit, and the opposite ends of the elastic member 6 are respectively embedded in the moving iron core 7 and the yoke sheet 4. Since there is no additional guide portion at the lower end of the moving iron core 7, the overall mass of the moving iron core 7 is reduced, and the driving current required by the electromagnetic drive unit is reduced. When the PLC controller controls the electromagnetic drive unit to be powered on, a magnetic circuit is generated in the electromagnetic drive unit and a magnetic attraction force is generated. The magnetic attraction force can attract the moving iron core 7 to move downward, and finally close the moving iron core 7 and the yoke sheet 4, and compress the elastic member 6, meeting the requirements of directly starting the electromagnetic system using the PLC controller. Since the opposite ends of the elastic member 6 are respectively embedded in the moving iron core 7 and the yoke sheet 4, the stability of the connection between the three is guaranteed. When the PLC controller controls the electromagnetic drive unit to be powered off, the magnetic attraction force in the electromagnetic drive unit disappears, the elastic member 6 is released, and the moving iron core 7 is separated from the yoke sheet 4 and reset under the action of the elastic member 6.

[0042] Furthermore, if Figure 2 and Figure 3 As shown, the elastic member 6 is a reaction spring, a positioning hole 41 is provided on the side of the yoke sheet 4 facing the moving iron core 7, a positioning groove 71 is provided on the side of the moving iron core 7 facing the yoke sheet 4, one end of the elastic member 6 is embedded in the positioning hole 41, and the other end of the elastic member 6 is embedded in the positioning groove 71. One end of the elastic member 6 is embedded in the positioning groove 71 of the moving iron core 7, and the other end of the elastic member 6 is embedded in the positioning hole 41 of the yoke sheet 4. The elastic member 6 is positioned by the positioning groove 71 of the moving iron core 7 and the positioning hole 41 of the yoke sheet 4. The depth of the elastic member 6 embedded in the positioning groove 71 and the depth of the elastic member 6 embedded in the positioning hole 41 can be designed according to actual use. By increasing the length of the embedded part of the elastic member 6, the length of the non-embedded part of the elastic member 6 can be shortened, thereby preventing the elastic member 6 from swinging left and right when moving up and down.

[0043] Furthermore, if Figure 3As shown, the electromagnetic drive unit includes a coil skeleton 3 and an enameled wire 2. The coil skeleton 3 includes a first plate 31, a winding tube 32 and a second plate 33. The first plate 31 and the second plate 33 are respectively arranged at opposite ends of the winding tube 32. The enameled wire 2 is wound around the outer wall of the winding tube 32. The connecting column 5 is inserted into the winding tube 32. The first plate 31 is in contact with the static iron core 1. The second plate 33 is provided with a rib 34. The side wall of the rib 34 is provided with a first limiting portion 35. The side wall of the yoke piece 4 is provided with a second limiting portion 42. The first limiting portion 35 is clamped with the second limiting portion 42. Since the first limiting portion 35 is only arranged on the side wall of the rib 34, and the second limiting portion 42 is only arranged on one of the side walls of the yoke piece 4, it is a fool-proof design, which can ensure that the yoke piece 4 will not be installed upside down during assembly.

[0044] Furthermore, one of the first limiting portion 35 and the second limiting portion 42 is a limiting groove, and the other of the first limiting portion 35 and the second limiting portion 42 is a limiting rib, and the limiting rib is engaged with the limiting groove. During the assembly of the yoke piece 4, the mutual limitation of the limiting rib and the limiting groove ensures that the yoke piece 4 is correctly installed. Exemplarily, in this embodiment, limiting ribs are provided on the side walls of the retaining edge 34, and limiting grooves are provided on one of the side walls of the yoke piece 4. When the yoke piece 4 is placed upside down, the limiting ribs on the retaining edge 34 can block the assembly of the yoke piece 4. When the yoke piece 4 is placed upright, the limiting grooves on the yoke piece 4 can avoid the limiting ribs on the retaining edge 34, ensuring that the yoke piece 4 is assembled normally.

[0045] Furthermore, if Figure 3 As shown, the side wall of the first plate 31 is provided with a wire groove 36, and the terminal of the enameled wire 2 is passed through the wire groove 36. By adding the wire groove 36, it is convenient to arrange the terminal of the enameled wire 2 in the wire groove 36, avoid the scattered arrangement of the terminal, and prevent the occurrence of wiring errors or short circuits.

[0046] Furthermore, if Figure 3 As shown, at least one support column 37 is provided at the lower end of the first plate 31. By adding the support column 37, it is convenient to stably place the assembled electromagnetic system on the workstation. For example, in this embodiment, two support columns 37 are provided on the first plate 31 at the bottom of each coil skeleton 3, further improving the stability of the placement of the electromagnetic system.

[0047] Furthermore, if Figure 3 As shown, a polygonal cavity 38 is provided inside the winding tube 32, and the connecting post 5 matches the shape of the polygonal cavity 38, and the connecting post 5 is stopped in the polygonal cavity 38. Preferably, the polygonal cavity 38 is a rectangular cavity, and the connecting post 5 is a rectangular structure. The connecting post 5 is set to be rectangular, and a polygonal cavity 38 matching the connecting post 5 is set in the winding tube 32, and the connecting post 5 is prevented from rotating relative to the winding tube 32 by limiting the shape.

[0048] Furthermore, if Figure 3 As shown, the yoke sheet 4 is provided with a first connection hole 43, and the second end of the connection column 5 is provided with a second connection hole 51, and the fastener 8 can pass through the first connection hole 43 and connect with the second connection hole 51. Exemplarily, the fastener 8 can be, but is not limited to, a screw or a rivet, to ensure the connection stability between the yoke sheet 4 and the first end of the connection column 5.

[0049] In other implementations, the yoke piece 4 and the second end of the connecting column 5 may also be fixed by welding, riveting or other connection methods.

[0050] Furthermore, if Figure 3 As shown, the side wall of the static iron core 1 is provided with a limit slot 11, and the first end of the connecting column 5 is clamped with the limit slot 11. The limit slot 11 is clamped with the first end of the connecting column 5, and no additional screws or bolts are required for fixing. Preferably, after the first end of the connecting column 5 is clamped with the limit slot 11 of the static iron core 1, welding is performed at the clamping position to further ensure the firmness of the connection between the static iron core 1 and the connecting column 5.

[0051] This embodiment also provides a DC switch, which includes a protective housing and the above-mentioned electromagnetic system, wherein the electromagnetic system is arranged in the protective housing. After the PLC controller is connected to the electromagnetic system in the DC switch, the electromagnetic system of the DC switch can be directly started by the PLC controller to work normally.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An electromagnetic system, characterized in that include: Static iron core (1); Electromagnetic drive units, at least two groups of the electromagnetic drive units are arranged on the static iron core (1); There are at least two connecting columns (5), wherein a first end of the connecting column (5) is connected to the static iron core (1), and a second end of the connecting column (5) passes through the corresponding electromagnetic drive unit and extends out; At least two yoke pieces (4) are provided, and the yoke pieces (4) are connected to the second ends of the corresponding connecting posts (5); Moving iron core (7); At least two elastic members (6) are provided, one end of the elastic member (6) is embedded in the corresponding yoke sheet (4), and the other end of the elastic member (6) is embedded in the moving iron core (7).

2. The electromagnetic system according to claim 1, characterized in that A positioning hole (41) is provided on the side of the yoke sheet (4) facing the moving iron core (7), a positioning groove (71) is provided on the side of the moving iron core (7) facing the yoke sheet (4), one end of the elastic member (6) is embedded in the positioning hole (41), and the other end of the elastic member (6) is embedded in the positioning groove (71).

3. The electromagnetic system according to claim 1, characterized in that The electromagnetic drive unit comprises a coil frame (3) and an enameled wire (2), wherein the coil frame (3) comprises a first plate (31), a winding tube (32) and a second plate (33), wherein the first plate (31) and the second plate (33) are respectively arranged at opposite ends of the winding tube (32), the enameled wire (2) is wound around the outer wall of the winding tube (32), the connecting column (5) is passed through the winding tube (32), the first plate (31) is in contact with the static iron core (1), the second plate (33) is provided with a retaining edge (34), the side wall of the retaining edge (34) is provided with a first limiting portion (35), the side wall of the yoke sheet (4) is provided with a second limiting portion (42), and the first limiting portion (35) is clamped with the second limiting portion (42).

4. The electromagnetic system according to claim 3, characterized in that One of the first limiting portion (35) and the second limiting portion (42) is a limiting groove, and the other of the first limiting portion (35) and the second limiting portion (42) is a limiting rib, and the limiting rib is engaged with the limiting groove.

5. The electromagnetic system according to claim 3, characterized in that A wire groove (36) is provided on the side wall of the first plate (31), and the connection end of the enameled wire (2) is inserted into the wire groove (36).

6. The electromagnetic system according to claim 3, characterized in that At least one supporting column (37) is provided at the lower end of the first plate (31).

7. The electromagnetic system according to claim 3, characterized in that A polygonal cavity (38) is provided inside the winding tube (32), the connecting column (5) matches the shape of the polygonal cavity (38), and the connecting column (5) is prevented from rotating inside the polygonal cavity (38).

8. The electromagnetic system according to claim 1, characterized in that The yoke sheet (4) is provided with a first connection hole (43), the second end of the connection column (5) is provided with a second connection hole (51), and the fastener (8) can pass through the first connection hole (43) and connect with the second connection hole (51).

9. The electromagnetic system according to claim 8, characterized in that A side wall of the static iron core (1) is provided with a limiting slot (11), and the first end of the connecting column (5) is engaged with the limiting slot (11).

10. A DC switch, characterized in that: It comprises a protective shell and an electromagnetic system as described in any one of claims 1 to 9, wherein the electromagnetic system is arranged in the protective shell.

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