Coil assembly and electromagnetic valve

Abstract

The utility model discloses a coil assembly and an electromagnetic valve. The coil assembly comprises a magnetic conductive shell, an insulating shell and a coil main body, the magnetic conductive shell is of a cylindrical structure, and the bottom of the magnetic conductive shell is of an annular inwards-concave structure. The magnetic conductive shell is embedded in the insulating shell, and a first connecting part is formed on the inner wall of the magnetic conductive shell; a center hole is formed in the center of the upper part of the magnetic conductive shell; the insulating shell comprises an inner layer and an outer layer; the inner layer of the insulating shell is clamped between the magnetic conductive shell and the coil main body, and the outer layer of the insulating shell sleeves the radial periphery of the magnetic conductive shell; the coil main body is arranged between the magnetic conductive shell and the central convex structure of the electromagnetic head; and the coil main body is positioned in the inner layer of the insulating shell and is connected with the inner layer of the insulating shell. According to the coil assembly provided by the utility model, a traditional clamp spring and clamp groove structure is eliminated, and the assembly efficiency and the structural stability are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper valve technology, and in particular to a coil assembly and a solenoid valve. Background Technology

[0002] In the field of automotive shock absorbers, adjustable damping shock absorbers are widely used to improve driving comfort and handling. The solenoid valve, as its core actuator, adjusts the valve core opening by changing the coil current, thereby changing the damping force in real time.

[0003] In existing technologies, solenoid valve coil assemblies typically consist of a coil wound on a frame and then housed in a machined metal casing. The casing's encapsulation and sealing usually rely on a snap ring structure to secure the internal coil assembly. This conventional structure has the following significant drawbacks:

[0004] The installation of snap rings is complex and prone to breakage, posing a safety hazard, and the assembly is difficult to automate. In addition, the magnetic conduction effect of the coil depends on the dimensional accuracy and assembly quality of multiple parts such as snap rings and snap ring slots. Insufficient accuracy or improper assembly of snap rings and snap ring slots can easily cause the risk of jamming or falling off, thus affecting the performance of the solenoid valve.

[0005] The coil housing is made of machined metal, which results in low material utilization and long processing time, leading to high manufacturing costs.

[0006] Based on this, the present invention proposes a coil assembly and a solenoid valve to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this invention is to provide a coil assembly and a solenoid valve to overcome the shortcomings of the prior art, such as complex processes, safety hazards, high manufacturing costs, and poor performance stability.

[0008] To solve the above-mentioned technical problems, this utility model provides a coil assembly, including a magnetic housing, an insulating outer shell, and a coil body;

[0009] The magnetically conductive housing has a cylindrical structure, and the bottom of the magnetically conductive housing has an annular concave structure. The magnetically conductive housing is embedded inside the insulating shell, and the inner wall of the magnetically conductive housing forms a first connecting part for cooperating with the solenoid valve connecting part. The first connecting part has an annular structure. The upper center of the magnetically conductive housing is provided with a central hole that radially and slightly mates with the central protrusion structure of the electromagnetic head.

[0010] The insulating shell includes an inner layer and an outer layer; the inner layer of the insulating shell is sandwiched between the magnetically conductive shell and the coil body, and its outer layer is sleeved on the radial outer periphery of the magnetically conductive shell;

[0011] The coil body is arranged between the magnetic housing and the central protrusion structure of the electromagnetic head; the coil body is located inside the inner layer of the insulating shell and is connected to the inner layer of the insulating shell.

[0012] Furthermore, the magnetically conductive housing is a magnetically conductive metal component, and the insulating outer shell is a plastic component.

[0013] Furthermore, the outer layer of the insulating shell is integrally injection molded.

[0014] Furthermore, one end of the outer layer of the insulating shell is a closed structure, and the other end of the outer layer of the insulating shell is an open structure.

[0015] Furthermore, the first connecting part and the solenoid valve connecting part are connected by interference fit, riveting or welding.

[0016] Furthermore, the coil body includes an insulating frame and copper wire;

[0017] The insulating frame is fixedly connected to the inner layer of the insulating outer shell;

[0018] The copper wire is wound around the insulating frame.

[0019] Furthermore, the outer wall of the outer layer of the insulating shell near the first connecting portion has a second connecting portion, which has an annular structure.

[0020] Furthermore, the magnetically conductive housing is in contact with the inner end face of the outer layer of the insulating outer shell.

[0021] Furthermore, the magnetically conductive housing is partially embedded inside the outer layer of the insulating outer shell or completely embedded inside the outer layer of the insulating outer shell.

[0022] This utility model also provides a solenoid valve, including the above-mentioned coil assembly, solenoid valve body and sealing ring;

[0023] The coil assembly is fixedly engaged with the solenoid valve connection part of the solenoid valve body through its first connection part, and the central hole of the coil assembly is radially fitted with the central protrusion structure of the solenoid head of the solenoid valve body with a small clearance.

[0024] The solenoid valve body is threadedly installed in the damper valve housing;

[0025] The sealing ring is assembled on the inner wall of the damper valve housing;

[0026] When the coil assembly is fully assembled into the solenoid valve body and the damper valve housing, the outer wall of the magnetic housing is tightly fitted with the inner wall of the sealing ring, the end face of the outer layer of the insulating shell is in close contact with the end face of the sealing ring, and the second connecting part of the coil assembly is embedded in the damper valve housing and tightly fitted with the side wall of the damper valve housing to achieve a seal.

[0027] Alternatively, after the coil assembly is fully assembled into the solenoid valve body and the damper valve housing, the second connecting part of the coil assembly extends into the inner wall of the damper valve housing, and the second connecting part is tightly fitted with the inner wall of the sealing ring to achieve a seal.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects:

[0029] (1) The coil assembly provided by this utility model eliminates the traditional snap ring and slot structure. During installation, it not only saves the cumbersome snap ring installation process, thereby avoiding the safety hazard of snap ring breakage and reducing the assembly difficulty, but also avoids the problem of snapping or falling off caused by poor fit between the snap ring and the slot, thereby improving the assembly efficiency and structural stability.

[0030] Furthermore, the outer layer of the insulating shell is made by one-piece injection molding. Compared with the traditional machined metal shell, this not only improves material utilization, shortens the production cycle and reduces manufacturing costs, but also allows for precise matching of the assembly dimensions of the magnetic shell and the coil body through the injection molding process, ensuring that all components fit tightly and improving structural synergy.

[0031] (2) The solenoid valve provided by this utility model achieves stable installation of the solenoid valve body and the damper valve shell through threaded connection, and achieves sealing with sealing ring. No additional auxiliary fasteners are required. While simplifying the assembly process, it effectively ensures the sealing reliability and long-term working stability of the solenoid valve. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the installation of the solenoid valve in Embodiment 1 of this utility model;

[0033] Figure 2 This is a schematic diagram of the coil assembly in Embodiment 1 of this utility model;

[0034] Figure 3 This is a schematic diagram of the installation of the solenoid valve in Embodiment 2 of this utility model;

[0035] Figure 4 This is a schematic diagram of the coil assembly in Embodiment 2 of this utility model.

[0036] In the figure: 1. Magnetic housing; 10. First connecting part; 11. Center hole; 2. Insulating housing; 20. Inner layer; 21. Outer layer; 22. Second connecting part; 3. Coil body; 4. Solenoid valve body; 40. Center protrusion structure of solenoid head; 41. Solenoid valve connecting part; 5. Sealing ring; 6. Vibration damper valve body. Detailed Implementation

[0037] The coil assembly and solenoid valve of this utility model will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0038] The present invention will be described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment proposes a solenoid valve, including a coil assembly, a solenoid valve body 4, and a sealing ring 5.

[0041] Specifically, refer to Figure 2 The coil assembly includes a magnetically conductive housing 1, an insulating outer shell 2, and a coil body 3. The magnetically conductive housing 1 has a cylindrical structure, and the bottom of the magnetically conductive housing 1 has an annular concave structure, i.e., a cylindrical lower enclosure structure. The magnetically conductive housing 1 is partially embedded inside the insulating outer shell 2, and the inner wall of the magnetically conductive housing 1 forms a first connecting part 10, which has an annular concave structure. The upper center of the magnetically conductive housing 1 is provided with a central hole 11. The insulating outer shell 2 includes an inner layer 20 and an outer layer 21. The inner layer 20 of the insulating outer shell 2 is sandwiched between the magnetically conductive housing 1 and the coil body 3, and its outer layer 21 is sleeved on the radial outer periphery of the magnetically conductive housing 1. The coil body 3 is arranged between the magnetically conductive housing 1 and the electromagnetic head central protrusion structure 40 of the electromagnetic valve body 4. The coil body 3 is located inside the inner layer 20 of the insulating outer shell 2 and is connected to the inner layer 20 of the insulating outer shell 2.

[0042] One end of the outer layer 21 of the insulating shell 2 is closed, and the other end is open. After the magnetic shell 1 is embedded in the outer layer 21 of the insulating shell 2, it contacts and fits against the inner end face of the outer layer 21 of the insulating shell 2. Its outer side wall and the inner layer 20 and outer layer 21 of the insulating shell 2 form an all-round covering and limiting of the coil body 3. At the same time, the coil body 3 is fixedly connected to the inner layer 20 of the insulating shell 2. The inner layer 20 and outer layer 21 of the insulating shell 2 are connected to the magnetic shell 1, ensuring that the magnetic shell 1, the outer layer 21 of the insulating shell 2, the inner layer 20 of the insulating shell 2 and the coil body 3 form a stable integrated module.

[0043] The insulating shell 2 is made of plastic, and both the inner layer 20 and the outer layer 21 are integrally injection molded. Compared with the traditional metal machined shell, it not only improves the material utilization rate, shortens the production cycle and reduces the manufacturing cost, but also can accurately match the assembly dimensions of the inner layer 20 of the insulating shell 2 and the coil body 3 through the injection molding process, ensuring that the components fit tightly and improving the structural synergy.

[0044] The outer wall of the outer layer 21 of the insulating shell 2 near the first connecting part 10 has a second connecting part 22, which has an annular concave structure.

[0045] The magnetic housing 1 is a metal magnetic component, which ensures that a stable magnetic field is quickly generated after the coil body 3 is energized, thereby improving the response accuracy of the solenoid valve damping adjustment; at the same time, the metal soft magnetic material has both good structural rigidity and processing adaptability, which provides a guarantee for the modular design and assembly reliability of the coil assembly.

[0046] The coil body 3 includes an insulating frame and copper wire; the insulating frame is fixedly connected to the inner layer 20 of the insulating shell 2, and the copper wire is wound on the insulating frame. Specifically, the insulating frame is made of plastic nylon and can be manufactured by injection molding, providing a flat and stable winding reference for the copper wire. It can be fixedly connected to the inside of the inner layer 20 of the insulating shell 2 by fitting or bonding, so that the coil body 3 is firmly anchored in the preset assembly position.

[0047] It should be noted that the method of winding the copper wire onto the insulating frame is existing technology and will not be elaborated upon here.

[0048] The coil assembly engages with the solenoid valve connection part 41 of the solenoid valve body 4 via its first connecting part 10. Without requiring additional slots or inserting a retaining ring, it can be fixed using an interference fit, riveting, or welding. This not only eliminates the cumbersome retaining ring installation process, thus avoiding the safety hazard of retaining ring breakage and reducing assembly difficulty, but also fundamentally prevents jamming or detachment caused by poor fit between the retaining ring and the slot, thereby improving assembly efficiency and structural stability. The central hole 11 of the coil assembly aligns radially with the central protrusion 40 of the solenoid head of the solenoid valve body 4, ensuring smooth insertion and precise alignment of the magnetic path, guaranteeing the magnetic conductivity of the coil body 3 after energization. The solenoid valve body 4 is threaded into the damper valve housing 6, and the sealing ring 5 is fitted to the inner wall of the damper valve housing 6. The threaded connection ensures stable installation of the solenoid valve body 4 and the damper valve housing 6, while the sealing ring 5 provides a seal. No additional auxiliary fasteners are needed, simplifying the assembly process while effectively ensuring the sealing reliability and long-term operational stability of the solenoid valve.

[0049] In this embodiment, after the coil assembly is fully assembled into the solenoid valve body 4 and the damper valve housing 6, the specific cooperation logic is as follows:

[0050] (1) Connection and magnetic conduction: The coil assembly is precisely fitted with the solenoid valve connection part 41 of the solenoid valve body 4 through the first connection part 10 preset on the inner wall of the magnetic housing 1; at the same time, the center hole 11 of the inner ring of the magnetic housing 1 and the center protrusion structure 40 of the solenoid head of the solenoid valve body 4 maintain a small radial clearance fit, ensuring that a smooth magnetic conduction path is formed after the coil body 3 is energized, reducing magnetic flux leakage and ensuring the response accuracy of the solenoid valve damping adjustment.

[0051] (2) Sealing and protection design: After the coil assembly is assembled, a "triple synergistic sealing" structure is formed to resist conventional environmental interference: the outer wall of the exposed section of the magnetic housing 1 extending out of the insulating housing 2 is tightly fitted with the inner wall of the sealing ring 5 installed in the mounting groove of the inner wall of the damper valve housing 6. The rigid support of the metal housing and the elastic deformation of the sealing ring 5 are used to construct the first sealing barrier; the end face of the insulating housing 2 near the opening end is fully pressed and fitted with the end face of the sealing ring 5, further compacting the sealing ring 5 to form the second sealing barrier; the second connecting part 22 preset on the outer wall of the insulating housing 2 is embedded in the corresponding slot of the damper valve housing 6, and its side wall is tightly fitted with the inner wall of the damper valve housing 6, which not only realizes the axial positioning of the coil assembly, but also forms an outer peripheral protective barrier, constituting the third sealing barrier.

[0052] In the above implementation process, the exposed magnetic housing section can serve as an assembly positioning reference, facilitating quick alignment and installation; the triple sealing structure has a high fault tolerance rate and can effectively cope with usage scenarios with high sealing requirements.

[0053] Example 2

[0054] like Figure 3 As shown, this embodiment proposes a solenoid valve, including a coil assembly, a solenoid valve body 4, and a sealing ring 5.

[0055] Specifically, refer to Figure 4 The difference between this embodiment and Embodiment 1 is that the magnetic housing 1 in the coil assembly is fully embedded inside the insulating housing 2.

[0056] In this embodiment, after the coil assembly is fully assembled into the solenoid valve body 4 and the damper valve housing 6, the specific cooperation logic is as follows:

[0057] Connection and magnetic conduction: The coil assembly is fitted and fixed to the solenoid valve connection part 41 of the solenoid valve body 4 through the first connecting part 10 on the inner wall of the magnetic housing 1; the central hole 11 of the magnetic housing 1 and the central protrusion structure 40 of the solenoid head of the solenoid valve body 4 maintain a small radial clearance fit, which not only ensures smooth assembly, but also minimizes magnetic leakage, and ensures that the coil body 3 quickly forms a concentrated and stable magnetic field after being energized, thereby improving the accuracy of the solenoid valve damping adjustment.

[0058] Sealing and protection design: After the coil assembly is assembled, the annular second connecting part 22 of the outer side wall of the insulating shell 2 near the first connecting part 10 extends axially into the inner side wall of the damper valve shell 6, and its outer side wall is tightly fitted with the inner side wall of the sealing ring 5; by utilizing the high-precision contour of the injection-molded insulating shell 2 and the elastic deformation of the sealing ring 5, a surface contact main sealing surface is formed to achieve sealing.

[0059] In the above implementation process, the design of the insulating shell 2 fully enclosing the magnetic shell 1, together with the sealing ring 5, ensures effective sealing while structurally isolating the metal shell from contact with the external environment. On the one hand, it can prevent the magnetic metal parts from rusting in humid, salt spray, corrosive and other media, thus extending the service life of the solenoid valve. On the other hand, it can meet the high-voltage insulation requirements, eliminate the risk of leakage caused by exposed metal, and meet the requirements of high safety standards. Furthermore, without reserving an exposed extension section of the magnetic shell 1, the overall axial dimension of the coil assembly can be reduced, and the radial profile is more regular, which can accurately adapt to scenarios with extremely limited installation space, such as miniature vibration dampers and precision instrument solenoid valves.

[0060] In summary, compared with the prior art, this utility model has at least the following advantages:

[0061] (1) The coil assembly provided by this utility model eliminates the traditional snap ring and slot structure. During installation, it not only saves the cumbersome snap ring installation process, thereby avoiding the safety hazard of snap ring breakage and reducing the assembly difficulty, but also avoids the problem of snapping or falling off caused by poor fit between the snap ring and the slot, thereby improving the assembly efficiency and structural stability.

[0062] Furthermore, the outer layer of the insulating shell is made by one-piece injection molding. Compared with the traditional machined metal shell, this not only improves material utilization, shortens the production cycle and reduces manufacturing costs, but also allows for precise matching of the assembly dimensions of the magnetic shell and the coil body through the injection molding process, ensuring that all components fit tightly and improving structural synergy.

[0063] (2) The solenoid valve provided by this utility model achieves stable installation of the solenoid valve body and the damper valve shell through threaded connection, and achieves sealing with sealing ring. No additional auxiliary fasteners are required. While simplifying the assembly process, it effectively ensures the sealing reliability and long-term working stability of the solenoid valve.

[0064] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A coil assembly, characterized by, Includes a magnetic housing, an insulating outer shell, and a coil body; The magnetically conductive housing has a cylindrical structure, and the bottom of the magnetically conductive housing has an annular concave structure. The magnetically conductive housing is embedded inside the insulating shell, and the inner wall of the magnetically conductive housing forms a first connecting part for cooperating with the solenoid valve connecting part. The first connecting part has an annular structure. The upper center of the magnetically conductive housing is provided with a central hole that radially and slightly mates with the central protrusion structure of the electromagnetic head. The insulating shell includes an inner layer and an outer layer; the inner layer of the insulating shell is sandwiched between the magnetically conductive shell and the coil body, and its outer layer is sleeved on the radial outer periphery of the magnetically conductive shell; The coil body is arranged between the magnetic housing and the central protrusion structure of the electromagnetic head; the coil body is located inside the inner layer of the insulating shell and is connected to the inner layer of the insulating shell.

2. The coil assembly of claim 1, wherein, The magnetically conductive housing is a magnetically conductive metal component, and the insulating outer shell is a plastic component.

3. The coil assembly of claim 1, wherein, The outer layer of the insulating shell is integrally injection molded.

4. The coil assembly of claim 1, wherein, The outer layer of the insulating shell has a closed structure at one end and an open structure at the other end.

5. The coil assembly of claim 1, wherein, The first connecting part and the solenoid valve connecting part are connected by interference fit, riveting or welding.

6. The coil assembly of claim 1, wherein, The coil body includes an insulating frame and copper wire; The insulating frame is fixedly connected to the inner layer of the insulating outer shell; The copper wire is wound around the insulating frame.

7. The coil assembly of claim 1, wherein, The outer wall of the outer layer of the insulating shell near the first connecting portion has a second connecting portion, which has a ring-shaped structure.

8. The coil assembly of claim 1, wherein, The magnetically conductive housing is in contact with the inner end face of the outer layer of the insulating outer shell.

9. The coil assembly of claim 1, wherein, The magnetically conductive housing is partially embedded inside the outer layer of the insulating outer shell or completely embedded inside the outer layer of the insulating outer shell.

10. An electromagnetic valve characterized by comprising: Includes the coil assembly, solenoid valve body, and sealing ring as described in any one of claims 1-9; The coil assembly is fixedly engaged with the solenoid valve connection part of the solenoid valve body through its first connection part, and the central hole of the coil assembly is radially fitted with the central protrusion structure of the solenoid head of the solenoid valve body with a small clearance. The solenoid valve body is threadedly installed in the damper valve housing; The sealing ring is assembled on the inner wall of the damper valve housing; When the coil assembly is fully assembled into the solenoid valve body and the damper valve housing, the outer wall of the magnetic housing is tightly fitted with the inner wall of the sealing ring, the end face of the outer layer of the insulating shell is in close contact with the end face of the sealing ring, and the second connecting part of the coil assembly is embedded in the damper valve housing and tightly fitted with the side wall of the damper valve housing to achieve a seal. Alternatively, after the coil assembly is fully assembled into the solenoid valve body and the damper valve housing, the second connecting part of the coil assembly extends into the inner wall of the damper valve housing, and the second connecting part is tightly fitted with the inner wall of the sealing ring to achieve a seal.

Images