An electromagnet

Abstract

This utility model discloses an electromagnet, belonging to the field of hydraulic technology. The electromagnet includes a shell, a coil assembly, a tail yoke assembly, and an armature assembly. The shell includes a shell body and a front yoke, with the front yoke connected to one end of the shell body. The tail yoke assembly includes a tail yoke disposed within the shell body, with the tail yoke positioned opposite the first end of the front yoke. The coil assembly includes a coil frame and enameled wire wound on the coil frame. The coil frame is cylindrical, with one end sandwiched between the shell body and the front yoke, and the other end sandwiched between the shell body and the tail yoke. The armature assembly includes an armature and a push rod connected to the armature. The armature is movably inserted into the tail yoke, and the end of the push rod opposite the armature passes through the front yoke. This electromagnet can ensure good insulation and waterproof performance of the coil assembly without requiring encapsulation, simplifying the assembly process, improving assembly efficiency, and reducing production costs to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to an electromagnet. Background Technology

[0002] An electromagnet is an electrical actuator that converts electrical energy into mechanical energy to perform commands. Compared with mechanical or hydraulic devices, electromagnets have advantages such as fast response time, strong electromagnetic attraction, small size and light weight, and are widely used in the field of industrial automation.

[0003] An electromagnet typically consists of a housing, a coil assembly, an armature, and a push rod. When current flows through the coil assembly, it generates a circular magnetic field. Under the influence of this magnetic field, the armature moves axially, simultaneously driving the push rod connected to the armature to move synchronously. This causes the push rod to extend out of the housing and trigger the switch of an external actuator. In related technologies, the gap between the coil assembly's frame and the coil is usually encapsulated with a sealing material to improve the coil assembly's insulation, waterproofing, and corrosion resistance. However, this design increases the electromagnet's material cost and affects the coil assembly's heat dissipation, thus impacting the electromagnet's performance.

[0004] Therefore, there is an urgent need for an electromagnet to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnet that can improve the heat dissipation performance of the coil assembly, while ensuring the insulation, waterproof and corrosion resistance of the coil assembly, and can reduce the processing cost of the electromagnet to a certain extent.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electromagnet, comprising:

[0008] The outer shell includes a shell body and a front yoke, the front yoke being connected to one end of the shell body;

[0009] The tail nut assembly includes a tail nut disposed within the shell body, and the tail nut is disposed opposite to the first end of the front yoke;

[0010] A coil assembly includes a coil frame and enameled wire wound on the coil frame. The coil frame is cylindrical. One end of the coil frame is clamped between the shell body and the front yoke, and the other end of the coil frame is clamped between the shell body and the tail yoke. A first sealing element is provided between the inner wall of the coil frame and the front yoke, and a second sealing element is provided between the inner wall of the coil frame and the tail yoke.

[0011] An armature assembly includes an armature and a push rod connected to the armature. The armature is movably inserted into the tailstock. The end of the push rod opposite to the armature passes through the front yoke. The armature can move relative to the tailstock when the coil assembly is energized, thereby driving the push rod to move relative to the front yoke.

[0012] As a preferred embodiment of the electromagnet provided by this utility model, the inner wall of the coil frame is further provided with an inner liner, the first sealing member is located between the inner liner and the front yoke, and the second sealing member is located between the inner liner and the tail yoke.

[0013] As a preferred embodiment of the electromagnet provided by this utility model, one end of the inner liner is provided with a first conical sealing surface, the first conical sealing surface is inclined from top to bottom in a direction away from the central axis of the coil frame, and the first sealing element is located between the first conical sealing surface and the front yoke;

[0014] And / or, the other end of the liner is provided with a second conical sealing surface, the second conical sealing surface is inclined from bottom to top in a direction away from the central axis of the coil skeleton, and the second seal is located between the second conical sealing surface and the tail.

[0015] As a preferred embodiment of the electromagnet provided by this utility model, the inner liner is integrally injection molded onto the coil frame.

[0016] As a preferred embodiment of the electromagnet provided by this utility model, the inner lining is made of a non-magnetic material.

[0017] As a preferred embodiment of the electromagnet provided by this utility model, the first end of the front yoke is provided with a guide groove, and the end of the armature opposite to the tail yoke is guided and fitted into the guide groove.

[0018] As a preferred embodiment of the electromagnet provided by this utility model, the depth of the guide groove is 2.0mm~5.0mm.

[0019] As a preferred embodiment of the electromagnet provided by this utility model, the front yoke is detachably connected to the shell body.

[0020] As a preferred embodiment of the electromagnet provided by this utility model, a limiting protrusion is provided on the outer wall of the front yoke, and a limiting step is provided on the inner wall of the shell body to limit and abut against the limiting protrusion.

[0021] As a preferred embodiment of the electromagnet provided by this utility model, the first end of the front yoke is frustum-shaped.

[0022] The beneficial effects of this utility model are as follows:

[0023] The electromagnet provided by this utility model, by setting the coil assembly as a coil skeleton and enameled wire wound on the coil skeleton, and by setting a first sealing element and a second sealing element between the coil skeleton and the front yoke and between the coil skeleton and the tail yoke respectively, can ensure that the coil assembly has good insulation, waterproof, corrosion resistance and heat dissipation performance, without encapsulating the coil assembly, simplifying the assembly process, improving assembly efficiency, and reducing production costs to a certain extent. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a cross-sectional schematic diagram of the electromagnet provided in an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of the shell body provided in an embodiment of the present utility model;

[0027] Figure 3 This is a cross-sectional schematic diagram of the front yoke provided in an embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of the armature assembly provided in an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the plug assembly provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the coil assembly provided in an embodiment of the present invention.

[0031] Figure label:

[0032] 10. Outer shell; 11. Shell body; 111. First end opening; 112. Second end opening; 1120. Limiting step; 12. Front yoke; 121. Through hole; 122. Guide groove; 123. Limiting protrusion;

[0033] 20. Plug assembly; 21. Socket; 22. Pins;

[0034] 30. Coil assembly; 31. Coil frame; 310. Mounting hole; 32. Enamelled wire; 33. Inner liner; 331. First conical sealing surface; 332. Second conical sealing surface;

[0035] 40. Tail component;

[0036] 50. Armature assembly; 51. Armature; 510. Insertion hole; 52. Push rod;

[0037] 61. First seal; 62. Second seal; 63. Third seal; 64. Fourth seal. Detailed Implementation

[0038] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0039] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0041] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0042] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0043] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0044] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0045] like Figure 1As shown, this embodiment provides an electromagnet, which includes a housing 10, a coil assembly 30, a tail nut assembly 40, and an armature assembly 50. The housing 10 includes a housing body 11 and a front yoke 12, with the front yoke 12 connected to one end of the housing body 11. The tail nut assembly 40 includes a tail nut disposed within the housing body 11, and the tail nut is disposed opposite to the first end of the front yoke 12. The coil assembly 30 includes a coil frame 31 and enameled wire 32 wound on the coil frame 31. The coil frame 31 is cylindrical, with one end of the coil frame 31 sandwiched between the housing body 11 and the front yoke 12, and the other end of the coil frame 31 sandwiched between the housing body 11 and the tail nut. A first sealing element 61 is provided between the inner wall of the coil frame 31 and the front yoke 12, and a second sealing element 62 is provided between the inner wall of the coil frame 31 and the tail nut. The armature assembly 50 includes an armature 51 and a push rod 52 connected to the armature 51. The armature 51 is movably inserted into the tailstock. The end of the push rod 52 opposite to the armature 51 passes through the front yoke 12. The armature 51 can move relative to the tailstock when the coil assembly 30 is energized, and at the same time drive the push rod 52 to move relative to the front yoke 12.

[0046] When the coil assembly 30 is energized, a ring-shaped magnetic field is generated along the shell body 11, tail yoke, and front yoke 12. Under the action of the ring-shaped magnetic field, the armature 51 can move along its own axis, thereby driving the push rod 52 to move synchronously, so as to output force and displacement, and thus trigger the switch of the external actuator. The working principle of the electromagnet is existing technology, and it will not be described in detail in this embodiment.

[0047] The electromagnet provided in this embodiment, by setting the coil assembly 30 as a coil frame 31 and an enameled wire 32 wound on the coil frame 31, and by setting a first sealing element 61 and a second sealing element 62 between the coil frame 31 and the front yoke 12 and between the coil frame 31 and the tail yoke respectively, can ensure that the coil assembly 30 has good insulation, waterproof, corrosion resistance and heat dissipation performance, without encapsulating the coil assembly 30, simplifying the assembly process, improving assembly efficiency, and reducing production costs to a certain extent.

[0048] In some embodiments, the inner wall of the coil frame 31 is further provided with a liner 33, a first sealing member 61 is located between the liner 33 and the front yoke 12, and a second sealing member 62 is located between the liner 33 and the tail yoke. In this embodiment, the liner 33 is made of a non-magnetic material, which can act as a magnetic barrier to reduce the coupling effect of external magnetic fields on the coil assembly 30, thereby maintaining the stability of the electromagnet's performance. Exemplarily, the liner 33 can be made of non-metallic materials, such as plastic or rubber, or it can be made of metallic materials, such as copper or aluminum. When a metallic liner 33 is used, it can also increase the rigidity of the coil frame 31 and improve the pressure resistance of the coil frame 31.

[0049] In some embodiments, the inner liner 33 is integrally injection molded onto the coil frame 31 to reduce the number of parts, simplify the assembly process, and facilitate installation. When the inner liner 33 is made of a non-metallic material, the inner liner 33 and the coil frame 31 are integrally injection molded, resulting in high injection molding production efficiency and good product quality. When the inner liner 33 is made of a metallic material, the inner liner 33 can be used as an insert integrally molded with the coil frame 31, simplifying the assembly process and improving assembly efficiency.

[0050] It should be noted that when the inner wall of the coil frame 31 is lined with a metal inner liner 33, the electromagnet can be used in applications requiring high pressure levels due to the high structural strength of the metal inner liner 33. When the inner wall of the coil frame 31 is lined with a non-metallic inner liner 33, or when no inner liner 33 is provided, the electromagnet can be used in applications requiring lower pressure levels. Users can select the appropriate coil assembly 30 according to their actual needs.

[0051] like Figure 1 As shown, one end of the inner liner 33 is provided with a first conical sealing surface 331, which is inclined from top to bottom away from the central axis of the coil frame 31. The first sealing element 61 is located between the first conical sealing surface 331 and the front yoke 12. The other end of the inner liner 33 is provided with a second conical sealing surface 332, which is inclined from bottom to top away from the central axis of the coil frame 31. The second sealing element 62 is located between the second conical sealing surface 332 and the tail yoke. By providing the first conical sealing surface 331 and the second conical sealing surface 332 on the inner liner 33, reliable installation of the first sealing element 61 and the second sealing element 62 can be achieved, ensuring good sealing performance between the coil assembly 30 and the front yoke 12, and between the coil assembly 30 and the tail yoke.

[0052] Optionally, both the first seal 61 and the second seal 62 can be rubber sealing rings, which have a simple structure, are easy to install, and have a good sealing effect.

[0053] It should be noted that the directional terms such as "up," "down," "inner," and "outer" used in this embodiment are all in the context of... Figure 1 The description of the orientation and positional relationships shown should not be construed as a limitation of this embodiment.

[0054] like Figures 2-3 and combined Figure 1 As shown, the shell body 11 is a shell-like structure with openings at both ends. The front yoke 12 is connected to the second end opening 112 of the shell body 11 and extends partially into the shell body 11. The part of the front yoke 12 that extends into the shell body 11 is the first end of the front yoke 12.

[0055] In some embodiments, the front yoke 12 also has a through hole 121 extending along its axial direction, through which the push rod 52 is movably inserted. A guide groove 122 is provided at the first end of the front yoke 12, and the end of the armature 51 facing away from the tailstock is guided and fitted into the guide groove 122. The guide groove 122 and the through hole 121 provide guidance for the movement of the armature 51, thereby ensuring the stability of the armature assembly 50 during movement.

[0056] For example, the depth of the guide groove 122 is 2.0mm to 5.0mm. Users can select a front yoke 12 with a suitable guide groove 122 depth according to actual usage requirements to meet the stroke requirements of the electromagnet. For example, the depth of the guide groove 122 can be 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc. Of course, in other embodiments, the depth of the guide groove 122 can also be any other value between 2.0mm and 5.0mm.

[0057] In some embodiments, the front yoke 12 is detachably connected to the housing body 11. When adjusting the stroke parameters of the electromagnet, the user can replace only the front yoke 12 without replacing the housing body 11, thereby reducing the operating cost of the electromagnet. Optionally, a limiting step 1120 is provided on the inner side of the second end opening 112 of the housing body 11, and a limiting protrusion 123 is provided on the outer wall of the front yoke 12, which abuts against the limiting step 1120. During installation, the front yoke 12 can be placed into the inner cavity of the housing body 11 through the first end opening 111. When the limiting protrusion 123 abuts against the limiting step 1120, the two are assembled in place. This configuration is simple in structure, easy to disassemble and assemble, and can reduce the number of connecting parts used to connect the housing body 11 and the front yoke 12, thus reducing processing costs.

[0058] like Figure 1 and Figure 3 As shown, the first end of the front yoke 12 is truncated cone-shaped. This arrangement significantly reduces the air gap reluctance, allowing the magnetic field lines to pass through the air gap more concentratedly, forming a more uniform magnetic field distribution and avoiding edge scattering or distortion. Furthermore, it increases the contact area between the magnetic poles and the air gap, increasing the air gap permeability, thereby generating a stronger magnetic field and a greater initial attraction under the same excitation current. Simultaneously, setting the first end of the front yoke 12 to a truncated cone shape also serves as a guide, improving the alignment between the front yoke 12 and the coil assembly 30 and increasing assembly efficiency.

[0059] like Figure 4As shown, the armature 51 has a insertion hole 510, and one end of the push rod 52 is interference-fitted into the insertion hole 510, thereby realizing a fixed connection between the armature 51 and the push rod 52, thus ensuring that the armature 51 can drive the push rod 52 to move synchronously when it moves; in addition, this connection method is convenient to operate and can reduce the number of parts and reduce processing costs.

[0060] like Figure 1 As shown, the electromagnet also includes a plug assembly 20, which is disposed at the first end opening 111 of the housing body 11. The plug assembly 20 is used to supply power to the coil assembly 30 to form a ring magnetic field between the housing body 11, the tail yoke, and the front yoke 12.

[0061] like Figures 5-6 and combined Figure 1 As shown, the plug assembly 20 includes a socket 21 and a pin 22. The socket 21 is sealed and installed at the first end opening 111 of the housing body 11. The pin 22 is disposed on the socket 21. The coil frame 31 is provided with mounting holes 310 corresponding to the pin 22. The pin 22 and the terminal of the enameled wire 32 are interference-fitted into the mounting holes 310 so that the pin 22 and the terminal abut against each other. By providing mounting holes 310 on the coil frame 31, and interference-fitting the terminal of the enameled wire 32 and the pin 22 into the mounting holes 310, a stable installation of the pin 22 and the terminal in the mounting holes 310 is achieved, while ensuring that they abut against each other, thus achieving a stable electrical connection.

[0062] To facilitate the quick insertion of pin 22 into mounting hole 310, such as Figure 5 As shown, the end of the pin 22 is truncated cone-shaped. The truncated cone structure can guide the pin 22 into the mounting hole 310, so that it can be inserted into the mounting hole 310 quickly and accurately.

[0063] like Figure 1 As shown, a third sealing element 63 is provided between the socket 21 and the housing body 11 to ensure the sealing performance between the socket 21 and the housing body 11. A fourth sealing element 64 is provided between the socket 21 and the tailstock to ensure the sealing performance between the socket 21 and the tailstock. Optionally, both the third sealing element 63 and the fourth sealing element 64 can be rubber sealing rings, which have a simple structure, are easy to install, and have a good sealing effect.

[0064] In this embodiment, the tail assembly 40 and the shell body 11 are interference-fitted, which facilitates assembly and ensures stable installation between the two.

[0065] After the front yoke 12, coil assembly 30, tail yoke assembly 40, armature assembly 50, and plug assembly 20 are all installed on the housing body 11, the first end opening 111 of the housing body 11 is rolled to complete the encapsulation, thereby ensuring the overall stability and sealing of the electromagnet. This also ensures that the socket 21, tail yoke, coil assembly 30, and front yoke 12 are tightly pressed together, further guaranteeing the connection quality of the terminals and pins 22 and preventing them from falling off during use, which would affect the performance of the electromagnet.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An electromagnet, characterized in that, include: The outer shell (10) includes a shell body (11) and a front yoke (12), the front yoke (12) being connected to one end of the shell body (11); The tail yoke assembly (40) includes a tail yoke disposed within the shell body (11), and the tail yoke is disposed opposite to the first end of the front yoke (12); The coil assembly (30) includes a coil frame (31) and enameled wire (32) wound on the coil frame (31). The coil frame (31) is cylindrical. One end of the coil frame (31) is clamped between the shell body (11) and the front yoke (12), and the other end of the coil frame (31) is clamped between the shell body (11) and the tail yoke. A first sealing element (61) is provided between the inner wall of the coil frame (31) and the front yoke (12), and a second sealing element (62) is provided between the inner wall of the coil frame (31) and the tail yoke. The armature assembly (50) includes an armature (51) and a push rod (52) connected to the armature (51). The armature (51) is movably inserted into the tailstock. The push rod (52) is disposed with one end away from the armature (51) through the front yoke (12). The armature (51) can move relative to the tailstock when the coil assembly (30) is energized, and at the same time drive the push rod (52) to move relative to the front yoke (12).

2. The electromagnet according to claim 1, characterized in that, The inner wall of the coil frame (31) is also provided with a liner (33), the first seal (61) is located between the liner (33) and the front yoke (12), and the second seal (62) is located between the liner (33) and the tail yoke.

3. The electromagnet according to claim 2, characterized in that, One end of the liner (33) is provided with a first conical sealing surface (331), which is inclined from top to bottom toward the central axis away from the coil skeleton (31), and the first seal (61) is located between the first conical sealing surface (331) and the front yoke (12). And / or, the other end of the liner (33) is provided with a second conical sealing surface (332), the second conical sealing surface (332) is inclined from bottom to top in a direction away from the central axis of the coil frame (31), and the second seal (62) is located between the second conical sealing surface (332) and the tail.

4. The electromagnet according to claim 2, characterized in that, The inner liner (33) is integrally injection molded onto the coil frame (31).

5. The electromagnet according to claim 2, characterized in that, The liner (33) is made of a non-magnetic material.

6. The electromagnet according to claim 1, characterized in that, The first end of the front yoke (12) is provided with a guide groove (122), and the end of the armature (51) facing away from the tail is guided and fitted into the guide groove (122).

7. The electromagnet according to claim 6, characterized in that, The depth of the guide groove (122) is 2.0mm~5.0mm.

8. The electromagnet according to any one of claims 1 to 7, characterized in that, The front yoke (12) is detachably connected to the shell body (11).

9. The electromagnet according to claim 8, characterized in that, The outer wall of the front yoke (12) is provided with a limiting protrusion (123), and the inner wall of the shell body (11) is provided with a limiting step (1120) that limits and abuts against the limiting protrusion (123).

10. The electromagnet according to any one of claims 1 to 7, characterized in that, The first end of the front yoke (12) is frustum shaped.

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