Electromagnetic coil assembly, electromagnet and electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetism, in particular to an electromagnetic coil assembly, an electromagnet and an electromagnetic valve. The electromagnetic coil assembly comprises a coil framework, a shell, a coil plastic-coated layer, a yoke and a sealing piece, the coil plastic-coated layer is arranged on the periphery of the coil framework, the shell is arranged on the periphery of the coil plastic-coated layer, and at least part of the shell and the yoke are located at the two axial ends of the coil framework respectively. The sealing element is clamped between the shell and the coil framework and / or the sealing element is clamped between the yoke and the coil framework, and the sealing element is embedded in the axial end faces of the coil framework and the coil plastic-coated layer and is used for sealing a fit clearance between the coil framework and the coil plastic-coated layer, so that external oil / water pollutants are effectively prevented from entering the coil, and the service life of the coil is prolonged. The risk that the interior of the coil is corroded is eliminated, normal work of the coil is guaranteed, the service life of the coil is prolonged, and the use safety of the coil is improved.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic technology, and in particular to an electromagnetic coil assembly, an electromagnet, and an electromagnetic valve. Background Art

[0002] Electromagnetic coil assemblies have a wide range of applications. Products such as electromagnets and solenoid valves all require coil assemblies as power-driven actuators to realize their functions. Among them, electromagnetic coil assemblies are used in a large proportion of the field of solenoid valves. Solenoid valves are often used to control the flow of liquids, so electromagnetic coil assemblies inevitably come into contact with liquids.

[0003] like Figure 1 As shown, electromagnetic coil assembly 100 ’ Including coil frame 20 ’ 10 outer shells ’ and coil 30 ’ , coil 30 ’ 20 coils wound around the coil frame ’ Above, coil frame 20 ’ Through the coil plastic coating layer 40 ’ and coil 30 ’ Plastic-coated injection molded together, outer shell 10 ’ Set in coil plastic coating layer 40 ’ On the outer periphery, during use, external contaminants such as oil / water may enter through the outer casing 10. ’ 20 coil bobbins ’ and coil plastic coating layer 40 ’ The gap between the mating parts penetrates into the internal coil by 30. ’ The position of coil 30 ’ There is a risk of corrosion, affecting coil 30. ’ It may disrupt normal operation and lifespan, and may also cause electrical leakage, resulting in safety hazards.

[0004] Therefore, there is an urgent need for an electromagnetic coil assembly, electromagnet, and solenoid valve to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnetic coil assembly, an electromagnet, and an electromagnetic valve that can effectively prevent external oil / water contaminants from entering the coil, eliminate the risk of internal corrosion, ensure normal operation of the coil, extend the coil's service life, and improve the safety of coil use.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] Electromagnetic coil assembly, including:

[0008] Coil frame;

[0009] The device comprises an outer shell, a coil plastic coating layer, a yoke, and a seal. The coil plastic coating layer is disposed on the outer periphery of the coil frame, and the outer shell is disposed on the outer periphery of the coil plastic coating layer. At least a portion of the outer shell and the yoke are respectively located at the two axial ends of the coil frame. The seal is clamped between the outer shell and the coil frame and / or between the yoke and the coil frame. The seal is embedded in the axial end faces of the coil frame and the coil plastic coating layer and is used to seal the mating gap between the coil frame and the coil plastic coating layer.

[0010] As an optional solution, the seal includes:

[0011] The main body is embedded in the axial end face of the coil frame and the coil plastic coating layer;

[0012] A first fixing part and a second fixing part are provided. The first fixing part is disposed on the inner side of the main body and abuts against the coil frame. The second fixing part is disposed on the outer side of the main body and abuts against the coil plastic coating layer.

[0013] As an optional solution, the main body includes:

[0014] Depression;

[0015] A first deformation portion and a second deformation portion are disposed on both radial sides of the recessed portion, so that the cross-section of the main body portion forms a shape with convex sides and a concave middle. Along the axial direction of the recessed portion, one end of the first deformation portion abuts against the coil frame and the other end abuts against the outer shell and / or the yoke, and one end of the second deformation portion abuts against the outer shell and / or the yoke and the other end abuts against the coil frame.

[0016] As an alternative, the first deformation portion and the second deformation portion have the same structure so that the cross-section of the seal is symmetrical.

[0017] As an optional solution, the first fixing part is a first protrusion, and there are multiple first protrusions, which are arranged at intervals along the periphery of the main body; and / or...

[0018] The second fixing part is a second protrusion, and there are multiple second protrusions, which are arranged at intervals along the periphery of the main body.

[0019] As an optional solution, the outer periphery of the coil frame is provided with a first step portion, and the outer periphery of the coil plastic coating layer is provided with a second step portion. The first step portion and the second step portion together form a mounting groove, and the sealing element is disposed in the mounting groove.

[0020] As an alternative, the bottom of the first step portion is of the same length as the bottom of the second step portion; and / or

[0021] The depth of the first step is equal to the depth of the second step.

[0022] As an optional solution, the outer periphery of the coil frame is provided with a third step portion, the third step portion being located on the side of the first step portion near the axis of the coil frame, and at least a portion of the coil coating layer is located within the third step portion.

[0023] An electromagnet, including the aforementioned electromagnetic coil assembly.

[0024] Solenoid valve, including the aforementioned solenoid coil assembly.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] The electromagnetic coil assembly provided by this utility model achieves a sealed connection between the outer shell and the coil frame and a sealed connection between the yoke and the coil frame by using a sealing element clamped between the outer shell and the coil frame and / or by using a sealing element clamped between the yoke and the coil frame. The sealing element is also embedded in the axial end face of the coil frame and the coil plastic coating layer to achieve a sealed connection between the coil frame and the coil plastic coating layer. This effectively prevents external oil / water contaminants from entering the coil, eliminates the risk of internal corrosion of the coil, ensures normal operation of the coil, extends the service life of the coil, and improves the safety of coil use.

[0027] The electromagnet provided by this invention, by applying the above-mentioned electromagnetic coil assembly, has a long service life and good safety performance.

[0028] The solenoid valve provided by this utility model has a long service life and good safety performance by applying the above-mentioned electromagnetic coil assembly. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 A cross-sectional view of an electromagnetic coil assembly in the prior art;

[0031] Figure 2 A cross-sectional view of an electromagnetic coil assembly provided in an embodiment of this utility model;

[0032] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0033] Figure 4 A cross-sectional view of the coil frame, coil, and coil plastic coating provided in an embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the sealing element provided in an embodiment of the present utility model.

[0035] Figure label:

[0036] 100. Electromagnetic coil assembly;

[0037] 10. Outer casing;

[0038] 20. Coil frame; 21. First step section; 22. Third step section;

[0039] 30. Coil;

[0040] 40. Coil plastic coating layer; 41. Second step section;

[0041] 50. Sealing element; 51. Main body; 511. Recessed portion; 512. First deformable portion; 513. Second deformable portion; 52. First fixing portion; 53. Second fixing portion;

[0042] 60. Mounting slot;

[0043] 70. Yoke;

[0044] 100 ’ 10 electromagnetic coil components; ’ , outer shell; 20 ’ 1. Coil frame; 30 ’ , coil; 40 ’ Coil plastic coating. DETAILED DESCRIPTION

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0051] like Figure 1 As shown, in the prior art, the electromagnetic coil assembly 100 ’ Including coil frame 20 ’ 10 outer shells ’ and coil 30 ’ , coil 30 ’ 20 coils wound around the coil frame ’ Above, coil frame 20 ’ Through the coil plastic coating layer 40 ’ and coil 30 ’ Plastic-coated injection molded together, outer shell 10 ’ Set in coil plastic coating layer 40 ’ On the outer periphery, during use, external contaminants such as oil / water may enter through the outer casing 10. ’ 20 coil bobbins ’ And the gap between the coil plastic coating layer 40' and the internal coil 30 is penetrated. ’ The position of coil 30 ’ There is a risk of corrosion, affecting coil 30. ’ It may disrupt normal operation and lifespan, and may also cause electrical leakage, resulting in safety hazards.

[0052] To solve the above problems, such as Figure 2As shown, the electromagnetic coil assembly 100 provided in this embodiment includes a housing 10, a coil frame 20, a sealing element 50, a coil plastic coating layer 40, a yoke 70, and a coil 30. The coil 30 is wound on the coil frame 20. The coil frame 20 and the coil 30 are injection molded together by the coil plastic coating layer 40. The housing 10 is disposed on the outer periphery of the coil plastic coating layer 40. At least a portion of the housing 10 and the yoke 70 are respectively located at the axial ends of the coil frame 20. The sealing element 50 is clamped between the housing 10 and the coil frame 20 and / or the sealing element 50 is clamped between the yoke 70 and the axial end face of the coil frame 20, and is used to seal the mating gap between the coil frame 20 and the coil plastic coating layer 40. By clamping the sealing element 50 between the outer shell 10 and the coil frame 20 and / or between the yoke 70 and the coil frame 20, a sealed connection is achieved between the outer shell 10 and the coil frame 20, as well as between the yoke 70 and the coil frame 20. By embedding the sealing element 50 on the axial end face of the coil frame 20 and the coil plastic coating layer 40, a sealed connection is achieved between the coil frame 20 and the coil plastic coating layer 40. This effectively prevents external oil / water contaminants from entering the interior of the coil 30, eliminates the risk of corrosion inside the coil 30, ensures the normal operation of the coil 30, extends the service life of the coil 30, and improves the safety of the coil 30 in use.

[0053] The coil frame 20 is designed to facilitate the fixing of the coil 30, while the coil sheath 40 further fixes the coil 30 and also protects it. It is understood that the coil 30 is formed by winding a conductor around the outer periphery of the coil frame 20. The conductor can be enameled wire.

[0054] like Figures 2-4 As shown, a third step 22 is provided on the outer periphery of the coil frame 20, and at least a portion of the coil coating layer 40 is located within the third step 22. After the coil 30 is wound on the coil frame 20, the coil coating layer 40 is formed by injection molding process so that at least a portion of the coil coating layer 40 is located within the third step 22, thereby improving the stability of the connection between the coil frame 20 and the coil coating layer 40.

[0055] Optionally, the outer periphery of the coil coating layer 40 is provided with a second step portion 41, and the outer periphery of the coil frame 20 is also provided with a first step portion 21. A third step portion 22 is located on the side of the first step portion 21 near the axis of the coil frame 20. The first step portion 21 and the second step portion 41 together form a mounting groove 60. The seal 50 is disposed in the mounting groove 60. The mounting groove 60 provides mounting space for the seal 50 to avoid the seal 50 from increasing the axial length of the electromagnetic coil assembly 100, which facilitates the miniaturization design of the electromagnetic coil assembly 100.

[0056] Optionally, the bottom of the first step 21 is the same length as the bottom of the second step 41; and / or the depth of the first step 21 is the same as the depth of the second step 41, so that the seal 50 can be better accommodated in the mounting groove 60.

[0057] Combination Figure 2 , Figure 3 and Figure 5 The specific structure of the seal 50 is described, such as... Figure 2 , Figure 3 and Figure 5 As shown, the sealing element 50 includes a first fixing part 52, a second fixing part 53, and a main body part 51. The first fixing part 52, the main body part 51, and the second fixing part 53 are arranged radially along the sealing element 50. The first fixing part 52 is disposed on the inner side of the main body part 51 and abuts against the coil frame 20. The second fixing part 53 is disposed on the outer side of the main body part 51 and abuts against the coil plastic coating layer 40. By abutting the coil frame 20 with the first fixing part 52 and abutting the coil plastic coating layer 40 with the second fixing part 53, the sealing element 50 is fixed in the mounting groove 60 to prevent the mounting element from shifting, thereby ensuring the sealing effect of the sealing element 50.

[0058] In this embodiment, the first fixing part 52 is a first protrusion, and there are multiple first protrusions, which are arranged at intervals along the periphery of the main body part 51; and / or, the second fixing part 53 is a second protrusion, and there are multiple second protrusions, which are arranged at intervals along the periphery of the main body part 51.

[0059] In other embodiments, the first fixing part 52 is a convex ring; and / or, the second fixing part 53 is a convex ring, which can achieve a sealing connection between the sealing member 50 and the groove wall of the mounting groove 60.

[0060] Optionally, the main body 51 includes a recessed portion 511, a first deformable portion 512, and a second deformable portion 513. The main body 51 is embedded in the axial end face of the coil frame 20 and the coil coating layer 40. The first deformable portion 512 and the second deformable portion 513 are disposed on both radial sides of the recessed portion 511, so that the cross-section of the main body 51 forms a shape with protrusions on both sides and a depression in the middle. Along the axial direction of the recessed portion 511, one end of the first deformable portion 512 abuts against the coil frame 20, and the other end abuts against the outer shell. The first deformation part 512 and the second deformation part 513 abut against the outer shell 10 and / or the yoke 70, and the other end abuts against the coil frame 20. The recessed part 511 provides sufficient deformation space for the first deformation part 512 and the second deformation part 513, thereby achieving a sealed connection between the outer shell 10 and the coil frame 20 and the coil plastic coating layer 40, as well as a sealed connection between the yoke 70 and the coil frame 20 and the coil plastic coating layer 40, thereby improving the protection of the coil 30.

[0061] Optionally, the first deformation part 512 and the second deformation part 513 have the same structure so that the cross-section of the seal 50 is symmetrical. The symmetrically arranged seal 50 can be subjected to uniform force during use, reducing wear and damage caused by uneven force, thereby extending the service life of the seal 50.

[0062] This embodiment also provides an electromagnet, including an iron core and the aforementioned electromagnetic coil assembly 100. When the electromagnetic coil assembly 100 is energized and magnetized, it can make the iron core magnetic, so as to attract ferromagnetic materials. By applying the aforementioned electromagnetic coil assembly 100, the electromagnet has a long service life and good safety performance.

[0063] This embodiment also provides a solenoid valve, including a moving iron, a valve core, a valve sleeve, and the aforementioned solenoid coil assembly 100. The valve core is movably disposed within the valve sleeve and connected to the moving iron. The moving iron is movably disposed within the solenoid coil assembly 100. The solenoid coil assembly 100 can drive the moving iron to move along its axial direction, thereby driving the valve core to move relative to the valve sleeve, so that the valve core opens or blocks the valve port on the valve sleeve. By applying the aforementioned solenoid coil assembly 100, the solenoid valve has a longer service life and better safety performance.

[0064] Note that in the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electromagnetic coil assembly, characterized in that, include: Coil frame (20); The device comprises a housing (10), a coil plastic coating layer (40), a yoke (70), and a sealing element (50). The coil plastic coating layer (40) is disposed on the outer periphery of the coil frame (20). The housing (10) is disposed on the outer periphery of the coil plastic coating layer (40), and at least a portion of the housing (10) and the yoke (70) are located at the axial ends of the coil frame (20), respectively. The sealing element (50) is clamped between the housing (10) and the coil frame (20) and / or between the yoke (70) and the coil frame (20), and the sealing element (50) is embedded in the axial end face of the coil frame (20) and the coil plastic coating layer (40), and is used to seal the mating gap between the coil frame (20) and the coil plastic coating layer (40).

2. The electromagnetic coil assembly according to claim 1, characterized in that, The seal (50) includes: The main body (51) is embedded in the axial end face of the coil frame (20) and the coil plastic coating layer (40); The first fixing part (52) and the second fixing part (53) are provided on the inner side of the main body (51) and abut against the coil frame (20), and the second fixing part (53) is provided on the outer side of the main body (51) and abuts against the coil coating layer (40).

3. The electromagnetic coil assembly according to claim 2, characterized in that, The main body (51) includes: Recess (511); The first deformation part (512) and the second deformation part (513) are disposed on the radial sides of the recessed part (511) so that the cross section of the main body part (51) forms a shape with two protrusions on both sides and a depression in the middle. Along the axial direction of the recessed part (511), one end of the first deformation part (512) abuts against the coil frame (20) and the other end abuts against the outer shell (10) and / or the yoke (70). One end of the second deformation part (513) abuts against the outer shell (10) and / or the yoke (70) and the other end abuts against the coil frame (20).

4. The electromagnetic coil assembly according to claim 3, characterized in that, The first deformation part (512) and the second deformation part (513) have the same structure so that the cross-section of the seal (50) is symmetrical.

5. The electromagnetic coil assembly according to claim 2, characterized in that, The first fixing part (52) is a first protrusion, and there are multiple first protrusions, which are arranged at intervals along the periphery of the main body part (51); and / or, The second fixing part (53) is a second protrusion, and there are multiple second protrusions, which are arranged at intervals along the periphery of the main body part (51).

6. The electromagnetic coil assembly according to any one of claims 1-5, characterized in that, The outer periphery of the coil frame (20) is provided with a first step portion (21), and the outer periphery of the coil plastic coating layer (40) is provided with a second step portion (41). The first step portion (21) and the second step portion (41) together form a mounting groove (60), and the sealing element (50) is disposed in the mounting groove (60).

7. The electromagnetic coil assembly according to claim 6, characterized in that, The bottom of the first step portion (21) is the same length as the bottom of the second step portion (41); and / or The depth of the first step (21) is equal to the depth of the second step (41).

8. The electromagnetic coil assembly according to claim 6, characterized in that, The outer periphery of the coil frame (20) is provided with a third step portion (22), the third step portion (22) is located on the side of the first step portion (21) near the axis of the coil frame (20), and at least a portion of the coil coating layer (40) is located inside the third step portion (22).

9. An electromagnet, characterized in that, Includes the electromagnetic coil assembly as described in any one of claims 1-8.

10. A solenoid valve, characterized in that, Includes the electromagnetic coil assembly as described in any one of claims 1-8.

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