Magnetic circuit system of relay

Abstract

The utility model discloses a magnetic circuit system of a relay, and relates to the technical field of relays, in particular to the magnetic circuit system of the relay, which comprises a base, a fixed plate is arranged in the base, and a plurality of groups of mounting holes are arranged on the surface of the fixed plate; the end part of the magnetic steel assembly is provided with a mounting shaft, and the mounting shaft and the mounting hole in the fixed plate are mounted in a matched manner; the coil framework is internally provided with yoke iron, the end parts of the yoke iron are provided with buckling lugs, and the buckling lugs and the mounting holes in the fixing plate are mounted in a matched manner; according to the magnetic circuit system of the relay, through unifying the assembly reference of each component, the accumulative error of assembly is reduced, so that the retention of the relay is stable, and the product performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, and more specifically to a magnetic circuit system of a relay. Background Art

[0002] A relay is an electronic control device, usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current, so it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] When using a relay, it is necessary to provide a stable and high-precision relay magnetic circuit system. In the prior art, the relay magnetic circuit system has different installation references for various components, which causes an increase in the cumulative assembly error, resulting in a decrease in the relay holding force and affecting product performance.

[0004] In summary, how to provide a method to avoid the degradation of product performance due to cumulative assembly errors is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a magnetic circuit system of a relay, which unifies the assembly standards of various components and thereby reduces the cumulative assembly errors, stabilizes the holding force of the relay, and thus improves product performance.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A magnetic circuit system of a relay, comprising:

[0008] A base, wherein a fixing plate is arranged inside the base, and a plurality of groups of mounting holes are arranged on the surface of the fixing plate;

[0009] A magnetic steel assembly, wherein a mounting shaft is provided at the end of the magnetic steel assembly, and the mounting shaft is mounted in cooperation with the mounting hole in the fixing plate;

[0010] A coil frame is provided with a yoke in the coil frame, and buckles are provided at the ends of the yoke, and the buckles are installed in cooperation with the mounting holes in the fixing plate.

[0011] Preferably, there are two groups of fixing plates arranged in parallel, and the magnetic steel assembly and the coil frame are fixedly installed between the two groups of fixing plates.

[0012] Preferably, the fixing plate comprises:

[0013] An intermediate fixing plate, the root of which is fixedly connected to the base and has a first mounting hole for mounting the magnetic steel assembly disposed therein;

[0014] The side fixing plates are arranged on both sides of the middle fixing plate, and the roots are fixedly connected to the base. The side fixing plates are provided with second mounting holes for mounting the yoke.

[0015] Preferably, a first guide groove is provided in the intermediate fixing plate for connecting the first mounting hole and the free end of the intermediate fixing plate.

[0016] Preferably, the bottom of the first guide groove is a wedge-shaped surface, and the groove depth of the first guide groove at one end close to the first mounting hole is smaller than that at the other end.

[0017] Preferably, the first mounting hole is a circular hole;

[0018] The installation axis of the magnetic steel assembly is a rotating shaft, and the rotating shaft is installed in cooperation with the first installation hole.

[0019] Preferably, a limiting protrusion is provided in the magnetic steel assembly, the limiting protrusion does not overlap with the axis of the rotating shaft, the limiting protrusion is inserted into the limiting slot inside the intermediate fixing plate, and the limiting slot is arranged parallel to the first guide groove.

[0020] Preferably, an elastic support arm is provided in the magnetic steel assembly, the elastic support arm is perpendicular to the rotating shaft, the root of the elastic support arm is fixedly connected to the magnetic steel assembly, and the free end of the elastic support arm abuts against the base.

[0021] Preferably, a second guide groove is provided in the side fixing plate for connecting the second mounting hole and the free end of the side fixing plate, the bottom of the second guide groove is a wedge-shaped surface, and the groove depth of the second guide groove at one end close to the second mounting hole is smaller than that at the other end.

[0022] Preferably, a third mounting hole is provided at the center line of the coil frame, and the yoke comprises a first yoke and a second yoke, and the first yoke and the second yoke are respectively inserted into the third mounting hole from both ends;

[0023] The first yoke is L-shaped, the long arm end of the first yoke is inserted into the third mounting hole, and the buckle ears are arranged on both sides of the short arm end of the first yoke;

[0024] The structure and installation method of the second yoke are consistent with those of the first yoke.

[0025] Compared with the prior art, the magnetic circuit system of the relay provided by the utility model has at least the following beneficial effects:

[0026] The base is used as the installation reference for most components. For example, the installation reference for the magnetic steel assembly and the coil frame is the same as the base. The installation error between the two is smaller than the sum of the errors between the two and the base, that is, smaller than the cumulative error under traditional multiple installation references, thereby reducing the impact on product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a specific embodiment provided by the utility model;

[0029] Figure 2 This is an exploded schematic diagram of parts of a specific embodiment provided by the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the base provided by the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the magnetic steel assembly provided by the utility model;

[0032] Figure 5 This is a schematic structural diagram of the first yoke provided by the utility model.

[0033] Figure 1-Figure 5 middle:

[0034] 1. Base; 11. Fixing plate; 101. Intermediate fixing plate; 1011. First mounting hole; 1012. First guide groove; 102. Side fixing plate; 1021. Second mounting hole; 1022. Second guide groove; 103. Limiting seam; 104. Mounting surface; 2. Magnetic steel assembly; 201. Rotating shaft; 202. Elastic support arm; 203. Limiting protrusion; 3. Coil skeleton; 301. Third mounting hole; 4. Yoke; 41. First yoke; 401. Insert; 402. Buckle ear; 42. Second yoke. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The core of the utility model is to provide a magnetic circuit system of a relay, which unifies the assembly datum of various components and thereby reduces the cumulative assembly error, stabilizes the holding force of the relay, and thus improves product performance.

[0037] Please refer to Figure 1-Figure 5 , a magnetic circuit system of a relay, comprising:

[0038] A base 1, a fixing plate 11 is arranged inside the base 1, and a plurality of mounting holes are arranged on the surface of the fixing plate 11;

[0039] A magnetic steel assembly 2, wherein a mounting shaft is provided at the end of the magnetic steel assembly 2, and the mounting shaft is mounted in cooperation with a mounting hole in the fixing plate 11;

[0040] The coil frame 3 has a yoke 4 disposed therein, and a buckle ear 402 is disposed at the end of the yoke 4. The buckle ear 402 is mounted in cooperation with the mounting hole in the fixing plate 11.

[0041] In actual use, the holding force of the electromagnet is mainly affected by the current in the coil and the size of the magnetic flux of the magnetic steel assembly 2, but is also affected by the assembly accuracy between the coil skeleton 3 and the magnetic steel assembly 2. When the assembly accuracy of the two decreases, the holding force of the electromagnet will become unstable. Therefore, in this application, the coil skeleton 3 and the magnetic steel assembly 2 are fixedly assembled with the same base 1. Specifically, the fixed plate 11 in the base 1 is used as the assembly reference of the magnetic steel assembly 2 and the coil skeleton 3, so that the sum of the assembly errors of the coil skeleton 3 and the magnetic steel assembly 2 with the base 1 is greater than the assembly error between the coil skeleton 3 and the magnetic steel assembly 2, that is, the cumulative assembly error between the coil skeleton 3 and the magnetic steel assembly 2 is reduced, thereby ensuring the stability of the holding force of the electromagnet and improving the overall product performance of the electromagnet.

[0042] In this embodiment, the setting mode and position of the fixing plate 11 are not limited. It is mainly limited that the magnetic steel assembly 2 and the coil skeleton 3 use the fixing plate 11 in the same base 1 as the installation reference, further reducing the cumulative installation error between the magnetic steel assembly 2, the coil skeleton 3 and the base 1. The fixing plate 11 is preferably installed on the side of the base 1 in the form of a cantilever beam to facilitate the assembly of the magnetic steel assembly 2 and the coil skeleton 3. However, the form of being arranged inside the base 1 in the form of a simply supported beam also belongs to the protection scope of this application and should be protected by this application.

[0043] In some embodiments, there are two sets of fixing plates 11 arranged in parallel, and the magnetic steel assembly 2 and the coil skeleton 3 are fixedly installed between the two sets of fixing plates 11;

[0044] like Figure 3As shown, there are two groups of fixing plates 11, which are arranged in parallel on one side of the outer peripheral surface of the base 1. The outer peripheral surface of the base 1 between the two groups of fixing plates 11 is the mounting surface 104. The root of the fixing plate 11 is fixedly connected to the mounting surface 104. The fixing plate 11 is preferably integrally formed with the base 1, and can also be fixedly installed by welding or snap-on connection. In this case, the fixing plate 11 is installed in the form of a cantilever beam.

[0045] like Figure 1 As shown, the magnetic steel assembly 2 and the coil skeleton 3 are both arranged between two sets of fixing plates 11;

[0046] like Figure 2 As shown, during assembly, the magnetic steel assembly 2 and the base 1 are assembled first, followed by the yoke 4 and the coil frame 3, and finally the coil frame 3 and the base 1, wherein the assembly references of the magnetic steel assembly 2 and the coil frame 3 and the base 1 are all the fixed plate 11.

[0047] In some embodiments, the fixing plate 11 assembled with the magnetic steel assembly 2 and the coil frame 3 is a whole plate, while in other embodiments, the fixing plates 11 assembled with the magnetic steel assembly 2 and the coil frame 3 are separated from each other but are fixedly connected to the same base 1 .

[0048] like Figure 3 As shown, the fixing plate 11 comprises:

[0049] The middle fixing plate 101 is fixedly connected to the base 1 at its root and is provided with a first mounting hole 1011 for mounting the magnetic steel assembly 2;

[0050] The side fixing plates 102 are arranged on both sides of the middle fixing plate 101, and the roots are fixedly connected to the base 1. The side fixing plates 102 are provided with second mounting holes 1021 for mounting the yoke 4.

[0051] The middle fixing plate 101 and the side fixing plate 102 are independent of each other, and the roots of both are fixedly connected to the base 1, which ensures that the magnetic steel assembly 2 and the coil frame 3 do not affect each other during installation, and also ensures that the cumulative error of the magnetic steel assembly 2 and the coil frame 3 during assembly meets the installation standard;

[0052] Secondly, the middle fixing plate 101 and the side fixing plate 102 are both installed in the form of cantilever beams, which have a certain elastic deformation capacity, that is, the spacing between the free end openings is adjustable, which facilitates the assembly of the magnetic steel assembly 2 and the coil skeleton 3 from the free end of the fixing plate 11.

[0053] like Figure 3 As shown, a first guide groove 1012 is provided in the middle fixing plate 101 for connecting the first mounting hole 1011 and the free end of the middle fixing plate 101;

[0054] Since the first mounting hole 1011 is located in the middle position of the middle fixing plate 101, and the magnetic steel component 2 needs to enter from the free end of the middle fixing plate 101 when being installed, adding the first guide groove 1012 facilitates guiding the entry path of the magnetic steel component 2 during the installation shaft assembly, thereby quickly completing the assembly with the first mounting hole 1011 and improving the installation efficiency.

[0055] Furthermore, the bottom of the first guide groove 1012 is a wedge-shaped surface, and the groove depth of the first guide groove 1012 at one end close to the first mounting hole 1011 is smaller than that at the other end;

[0056] When designing the distance between the two sets of fixing plates 11, it is necessary to ensure that the magnetic steel assembly 2 will not fall off, so the distance between the two sets of fixing plates 11 is smaller than the installation axis length of the magnetic steel assembly 2, that is, when the magnetic steel assembly 2 is installed, it is necessary to first expand the distance between the free ends of the intermediate fixing plate 101, and by providing the first guide groove 1012 on the bottom surface of the wedge-shaped groove, when the magnetic steel assembly 2 is installed, the intermediate fixing plate 101 can expand the distance between the free ends by itself, and when the installation axis enters the first installation hole 1011, the distance between the free ends of the intermediate fixing plate 101 can be restored, which reduces the difficulty of assembling the magnetic steel assembly 2.

[0057] Further, the first mounting hole 1011 is a circular hole;

[0058] The installation axis of the magnetic steel assembly 2 is the rotating shaft 201, and the rotating shaft 201 is installed in cooperation with the first installation hole 1011;

[0059] The matching design of the circular first mounting hole 1011 and the rotating shaft 201 enables it to be rotated at a small angle relative to the base 1 during installation to adjust the installation posture, thereby reducing the installation error between it and the subsequently installed coil frame 3. Specifically, when assembling the coil frame 3, the magnetic steel assembly 2 will be squeezed to move inward. Through the adjustment of the rotation of the magnetic steel assembly 2 around the rotating shaft 201, the two ends of the magnetic steel assembly 2 can be tightly fitted with the two ends of the coil frame 3, thereby reducing the assembly error between the two.

[0060] like Figure 1 and Figure 2 As shown, a limiting protrusion 203 is provided in the magnetic steel assembly 2, the limiting protrusion 203 does not overlap with the axis of the rotating shaft 201, the limiting protrusion 203 is inserted into the limiting slit 103 inside the middle fixing plate 101, and the limiting slit 103 is arranged parallel to the first guide groove 1012;

[0061] Since the middle fixing plate 101 and the side fixing plate 102 are relatively independent designs, there is a gap between them, which can be used as a limiting gap 103. When assembling the magnetic steel component 2, the limiting protrusion 203 is synchronously inserted into the limiting gap 103, which can limit the rotation angle of the magnetic steel component 2, that is, only a small angle of swing can be achieved.

[0062] At the same time, if Figure 4 As shown, an elastic arm 202 is provided in the magnetic steel assembly 2, the elastic arm 202 is perpendicular to the rotating shaft 201, the root of the elastic arm 202 is fixedly connected to the magnetic steel assembly 2, and the free end of the elastic arm 202 is in contact with the base 1;

[0063] An elastic support arm 202 capable of elastic deformation is added, and the free end of the elastic support arm 202 is abutted against the mounting surface 104, so as to further limit the magnetic steel assembly 2. When the coil skeleton 3 is energized, the electromagnetic force acts on the magnetic steel assembly 2, causing it to rotate and squeeze the magnetic steel assembly 2 inward. At this time, the elastic support arm 202 is pressed to deform, generating a reverse force that is balanced with the electromagnetic force generated by the coil skeleton 3, thereby placing the magnetic steel assembly 2 in a stable static state. When the coil skeleton 3 loses power, the electromagnetic force disappears, and the magnetic steel assembly 2 is reset under the action of the elastic support arm 202.

[0064] In some embodiments, a second guide groove 1022 is provided in the side fixing plate 102, which is used to connect the second mounting hole 1021 and the free end of the side fixing plate 102, the bottom of the second guide groove 1022 is a wedge-shaped surface, and the groove depth of the second guide groove 1022 at one end close to the second mounting hole 1021 is less than that at the other end;

[0065] The second guide groove 1022 has the same structure as the first guide groove 1012, and its purpose is to facilitate the assembly of the buckle ear 402 at the end of the yoke 4, wherein the second mounting hole 1021 is preferably a square hole, which can prevent the buckle ear 402 from rotating inside it, and a chamfered surface is provided on the side where the buckle ear 402 first contacts the second guide groove 1022 to facilitate assembly.

[0066] like Figure 2 and Figure 5 As shown, a third mounting hole 301 is provided at the center line of the coil frame 3, and the yoke 4 includes a first yoke 41 and a second yoke 42, and the first yoke 41 and the second yoke 42 are respectively inserted into the third mounting hole 301 from both ends;

[0067] The first yoke 41 is L-shaped, the long arm end of the first yoke 41 is inserted into the third mounting hole 301, and the buckle ears 402 are arranged on both sides of the short arm end of the first yoke 41;

[0068] The structure and installation method of the second yoke 42 are consistent with those of the first yoke 41;

[0069] like Figure 2As shown, a through hole is provided in the center line direction of the coil skeleton 3, namely the third mounting hole 301, for inserting the long arm ends of the first yoke 41 and the second yoke 42. The long arm ends of the first yoke 41 and the second yoke 42 are the insert body 401. After insertion, the short arm ends of the first yoke 41 and the second yoke 42 are respectively located at the left and right ends of the coil skeleton 3, and the first yoke 41 and the second yoke 42 are both L-shaped in design, using their own corners to limit the length of the insert body 401 and the third mounting hole 301. When the buckle ear 402 is assembled with the second mounting hole 1021, the yoke 4 can be prevented from separating from the coil skeleton 3.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] The magnetic circuit system of the relay provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A magnetic circuit system of a relay, characterized in that: include: A base (1), wherein a fixing plate (11) is arranged inside the base (1), and a surface of the fixing plate (11) is provided with a plurality of groups of mounting holes; A magnetic steel component (2), wherein an installation shaft is provided at an end of the magnetic steel component (2), and the installation shaft is mounted in cooperation with the installation hole in the fixing plate (11); A coil frame (3), wherein a yoke (4) is arranged inside the coil frame (3), and a buckle ear (402) is arranged at the end of the yoke (4), and the buckle ear (402) is mounted in cooperation with the mounting hole in the fixing plate (11).

2. The magnetic circuit system of the relay according to claim 1, characterized in that: There are two groups of fixed plates (11) arranged in parallel, and the magnetic steel assembly (2) and the coil frame (3) are both fixedly mounted between the two groups of fixed plates (11).

3. The magnetic circuit system of the relay according to claim 2, characterized in that: The fixing plate (11) comprises: An intermediate fixing plate (101), the root of which is fixedly connected to the base (1) and is provided with a first mounting hole (1011) for mounting the magnetic steel assembly (2); The side fixing plates (102) are arranged on both sides of the middle fixing plate (101), and the roots are fixedly connected to the base (1). The side fixing plates (102) are provided with second mounting holes (1021) for mounting the yoke iron (4) inside.

4. The magnetic circuit system of the relay according to claim 3, characterized in that: A first guide groove (1012) is provided in the intermediate fixing plate (101) and is used to connect the first mounting hole (1011) and the free end of the intermediate fixing plate (101).

5. The magnetic circuit system of the relay according to claim 4, characterized in that: The groove bottom of the first guide groove (1012) is a wedge-shaped surface, and the groove depth of one end of the first guide groove (1012) close to the first mounting hole (1011) is smaller than that of the other end.

6. The magnetic circuit system of a relay according to claim 4 or 5, characterized in that: The first mounting hole (1011) is a circular hole; The installation axis of the magnetic steel assembly (2) is a rotating shaft (201), and the rotating shaft (201) is installed in cooperation with the first installation hole (1011).

7. The magnetic circuit system of the relay according to claim 6, characterized in that: A limiting protrusion (203) is provided in the magnetic steel assembly (2); the limiting protrusion (203) does not overlap with the axis of the rotating shaft (201); the limiting protrusion (203) is inserted into a limiting slit (103) inside the middle fixing plate (101); and the limiting slit (103) is arranged in parallel with the first guide groove (1012).

8. The magnetic circuit system of a relay according to claim 6, characterized in that: An elastic support arm (202) is provided in the magnetic steel component (2), the elastic support arm (202) is perpendicular to the rotating shaft (201), the root of the elastic support arm (202) is fixedly connected to the magnetic steel component (2), and the free end of the elastic support arm (202) is in contact with the base (1).

9. The magnetic circuit system of a relay according to claim 3, characterized in that: A second guide groove (1022) is provided in the side fixing plate (102) for connecting the second mounting hole (1021) and the free end of the side fixing plate (102); the bottom of the second guide groove (1022) is a wedge-shaped surface; the groove depth of the second guide groove (1022) at one end close to the second mounting hole (1021) is smaller than that at the other end.

10. The magnetic circuit system of a relay according to claim 3 or 9, characterized in that: A third mounting hole (301) is provided at the center line of the coil frame (3), the yoke (4) comprises a first yoke (41) and a second yoke (42), and the first yoke (41) and the second yoke (42) are respectively inserted into the third mounting hole (301) from both ends; The first yoke (41) is L-shaped, the long arm end of the first yoke (41) is inserted into the third mounting hole (301), and the buckle ears (402) are arranged on both sides of the short arm end of the first yoke (41); The structure and installation method of the second yoke (42) are consistent with those of the first yoke (41).

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