Electromagnetic coil assembly

Abstract

The utility model relates to the technical field of electromagnetic valves, and discloses an electromagnetic coil assembly which comprises a magnetic conductive support and a coil assembly, the magnetic conductive support comprises a support body and cover plates arranged at the upper end and the lower end of the support body, a containing space is defined by the support body and the cover plates, and part of the structure of the coil assembly is contained in the containing space; each cover plate is provided with a connecting hole, and the aperture of one end, far away from the coil assembly, of the connecting hole is larger than that of one end, close to the coil assembly, of the connecting hole; the coil assembly is provided with a protruding structure, the protruding structure can stretch into the connecting hole, and the protruding structure can be filled in the connecting hole after being subjected to hot melting so that the coil assembly can be connected with the cover plate. According to the electromagnetic coil assembly, the hole diameter of the end, away from the coil assembly, of the connecting hole formed in the cover plate is larger than the hole diameter of the end, close to the coil assembly, of the connecting hole, the protruding structure on the coil assembly can be filled in the connecting hole after hot melting, and therefore the coil assembly and the cover plate are connected, and connection is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic coil assembly. Background Art

[0002] Electromagnetic coil assemblies have been widely used in engineering machinery, agricultural machinery, machine tools, metallurgy, special vehicle manufacturing, warehousing and logistics and other industries, and the application occasions and usage requirements are getting higher and higher. In addition, with the continuous improvement of my country's industrialization process, the application of electromagnetic coil assemblies is constantly extending. Especially in harsh occasions, it shines brightly.

[0003] The electromagnetic coil assembly includes a coil component and a magnetic bracket. Part of the structure of the coil component is accommodated in the magnetic bracket. In the prior art, the coil component and the upper and lower cover plates of the magnetic bracket are fixed by dispensing glue; or the coil component is provided with protrusions, and the upper and lower cover plates are provided with assembly holes, and the coil component and the cover plates are fixed by interference fit between the protrusions and the assembly holes.

[0004] The coil assembly will generate heat during normal operation. When it is fixed with glue, the glue between the upper and lower cover plates and the coil assembly may lose its viscosity due to long-term heat. When it is fixed with interference fit, since the magnetic bracket is made of metal, the expansion coefficient of the plastic on the outer surface of the coil assembly is quite different, and relative displacement occurs between the magnetic bracket and the coil assembly, which eventually leads to failure of fixation. Utility Model Content

[0005] The utility model aims to provide an electromagnetic coil assembly, which solves the technical problem in the prior art that the fixing between the coil assembly and the cover plate is easily invalidated by glue dispensing or interference fit.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an electromagnetic coil assembly, comprising a magnetic conductive bracket and a coil component, wherein the magnetic conductive bracket comprises a bracket body and cover plates arranged at the upper and lower ends of the bracket body, the bracket body and the cover plates enclose a receiving space, and a part of the structure of the coil component is accommodated in the receiving space;

[0008] Each of the cover plates is provided with a connection hole, and the hole diameter of the end of the connection hole away from the coil assembly is larger than the hole diameter of the end of the connection hole close to the coil assembly;

[0009] The coil assembly is provided with a protruding structure, which can extend into the connecting hole, and the protruding structure can be melted by hot melting and filled into the connecting hole to connect the coil assembly and the cover plate.

[0010] The electromagnetic coil assembly is provided with a connecting hole penetrating through the thickness of the cover plate, the hole diameter of the connecting hole at the end away from the coil assembly is larger than the hole diameter of the connecting hole at the end close to the coil assembly, the protruding structure on the coil assembly can extend into the connecting hole and can be filled in the connecting hole after being melted by hot melt, thereby connecting the coil assembly and the cover plate, which is more reliable than the connection method of gluing or interference fit.

[0011] As a preferred solution of the electromagnetic coil assembly, the connecting hole is a stepped hole, and the aperture of each step of the stepped hole decreases from an end away from the coil assembly to an end close to the coil assembly.

[0012] The connecting hole is a stepped hole, and the aperture of each step of the stepped hole decreases from the end far away from the coil assembly to the end close to the coil assembly. The molten protrusion structure melt can be filled in each step, increasing the contact area with the step and improving the connection strength.

[0013] As a preferred solution of the above electromagnetic coil assembly, the connecting hole is a T-shaped hole.

[0014] The connecting hole is a T-shaped hole, which has a relatively simple structure and is relatively convenient to prepare.

[0015] As a preferred solution of the above electromagnetic coil assembly, the diameter of the connecting hole gradually decreases from an end away from the coil assembly to an end close to the coil assembly.

[0016] The diameter of the connection hole gradually decreases from the end far from the coil assembly to the end close to the coil assembly. This structure can guide the molten molten protrusion structure to fill the connection hole and improve the connection strength.

[0017] As a preferred solution of the above-mentioned electromagnetic coil assembly, one of the two opposite side walls of the longitudinal cross-section of the connecting hole is a vertical side wall, and the other side wall is a step side wall or a sloped side wall, and the spacing between the groove walls of each level of step groove of the step side wall and the vertical side wall decreases along the direction approaching the coil assembly, and the sloped side wall gradually inclines toward the vertical side wall along the direction approaching the coil assembly.

[0018] The above structure enables the connection between the connection hole and the protruding structure to form an asymmetric connection, which can effectively prevent the protruding structure that has melted and then solidified from escaping from the connection hole, thereby improving the connection strength.

[0019] As a preferred solution of the above electromagnetic coil assembly, the outer diameter of the protrusion structure is greater than or equal to the hole diameter of one end of the connecting hole close to the coil assembly.

[0020] The above arrangement enables the protruding structure to extend into the connecting hole.

[0021] As a preferred solution of the electromagnetic coil assembly, the height of the protruding structure is greater than the depth of the connecting hole.

[0022] The above arrangement ensures that there is sufficient melted protruding structure melt to fill the connecting hole.

[0023] As a preferred solution of the above electromagnetic coil assembly, the connecting hole is an annular structure, the protruding structure is an annular structure, and the protruding structure is arranged corresponding to the connecting hole.

[0024] The connection hole and the protrusion structure are annular structures, and the cover plate and the coil assembly are matched and connected throughout the entire circumference, so the connection strength is good.

[0025] As a preferred solution of the electromagnetic coil assembly, the connection holes are provided in at least two circles, and the connection holes are nested with each other.

[0026] At least two circles of connection holes are provided, and the connection holes are nested with each other, which further increases the connection strength between the cover plate and the coil assembly.

[0027] As a preferred solution of the electromagnetic coil assembly, at least two connecting holes are provided, at least two protruding structures are provided, and each connecting hole corresponds to one protruding structure.

[0028] At least two connection holes are provided, and each connection hole corresponds to a protruding structure, thereby increasing the connection points and improving the connection strength between the cover plate and the coil assembly.

[0029] Beneficial effects of the utility model:

[0030] The electromagnetic coil assembly proposed in the utility model has a connection hole penetrating the thickness of the cover plate, the hole diameter of the connection hole at the end away from the coil component is larger than the hole diameter of the connection hole at the end close to the coil component, the protrusion structure on the coil component can extend into the connection hole, and can be filled in the connection hole after hot melting, thereby connecting the coil component and the cover plate, which is more reliable than the connection method of gluing or interference fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the electromagnetic coil assembly provided in the first embodiment of the utility model. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the structure of the electromagnetic coil assembly provided in the first embodiment of the utility model. Figure 2 ;

[0033] Figure 3 is a top view of the electromagnetic coil assembly provided in the first embodiment of the utility model;

[0034] Figure 4 yes Figure 3 Sectional view along AA direction;

[0035] Figure 5 This is a schematic diagram of the structure of the cover plate provided in the first embodiment of the utility model;

[0036] Figure 6 is a top view of the cover plate provided in the first embodiment of the utility model;

[0037] Figure 7 yes Figure 6 The cross-sectional view along the BB direction;

[0038] Figure 8 is a cross-sectional view of another cover plate provided in Embodiment 1 of the present utility model;

[0039] Fig. 9 It is a top view of a cover plate provided with an annular connecting hole provided in the first embodiment of the utility model;

[0040] Fig.10 yes Fig. 9 Cross-sectional view along CC direction;

[0041] Fig.11 It is a top view of a cover plate provided with two circles of annular connecting holes provided in the first embodiment of the utility model;

[0042] Fig.12 yes Fig.11 Sectional view along DD direction;

[0043] Fig.13 is a cross-sectional view of a cover plate provided in Embodiment 2 of the present utility model;

[0044] Fig.14 is a cross-sectional view of a cover plate provided in Embodiment 3 of the present utility model;

[0045] Fig.15 It is a cross-sectional view of another cover plate provided in the third embodiment of the present utility model;

[0046] Fig.16 It is a cross-sectional view of another cover plate provided in the third embodiment of the present utility model.

[0047] In the figure:

[0048] 1. Magnetic conductive bracket; 11. Bracket body; 12. Cover plate; 121. Connecting hole; 1211. Vertical side wall; 1212. Step side wall; 1213. Inclined side wall;

[0049] 2. Coil assembly; 211. Protrusion structure. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] The electromagnetic coil assembly includes a coil component and a magnetic bracket. Part of the structure of the coil component is accommodated in the magnetic bracket. In the prior art, the coil component and the upper and lower cover plates of the magnetic bracket are fixed by dispensing glue; or the coil component is provided with protrusions, and the upper and lower cover plates are provided with assembly holes, and the coil component and the cover plates are fixed by interference fit between the protrusions and the assembly holes.

[0055] The coil assembly will generate heat during normal operation. When it is fixed with glue, the glue between the upper and lower cover plates and the coil assembly may lose its viscosity due to long-term heat. When it is fixed with interference fit, since the magnetic bracket is made of metal, the expansion coefficient of the plastic on the outer surface of the coil assembly is quite different, and relative displacement occurs between the magnetic bracket and the coil assembly, which eventually leads to failure of fixation.

[0056] In order to solve the above problems, Figure 1-Figure 4 As shown, this embodiment provides an electromagnetic coil assembly, including a magnetic support 1 and a coil component 2, the magnetic support 1 includes a support body 11 and a cover plate 12 arranged at the upper and lower ends of the support body 11, the support body 11 is a cylindrical structure, the support body 11 and the cover plate 12 surround a receiving space, part of the structure of the coil component 2 is accommodated in the receiving space, and the plug-in connector for plugging in is located outside the magnetic support 1; each cover plate 12 is provided with a connecting hole 121, the aperture of the end of the connecting hole 121 away from the coil component 2 is larger than the aperture of the end of the connecting hole 121 close to the coil component 2; the coil component 2 includes a coil and a plastic shell covering the outside of the coil, the plastic shell is provided with a protruding structure 211, the protruding structure 211 can extend into the connecting hole 121, and the protruding structure 211 can be melted by hot melt and filled in the connecting hole 121 to connect the coil component 2 and the cover plate 12.

[0057] The electromagnetic coil assembly is provided with a connecting hole 121 penetrating the thickness of the cover plate 12, the aperture of the connecting hole 121 at the end away from the coil component 2 is larger than the aperture of the connecting hole 121 at the end close to the coil component 2, the protruding structure 211 on the coil component 2 can extend into the connecting hole 121, and can be filled in the connecting hole 121 after being melted by hot melt, thereby connecting the coil component 2 and the cover plate 12, which is more reliable than the connection method of gluing or interference fit, and improves the assembly efficiency.

[0058] It should be noted that the protruding structure 211 is made of plastic material and can be melted by heat pressing. The melted protruding structure 211 reversely locks the cover plate 12, thereby connecting the cover plate 12 to the coil assembly 2, and the connection is more reliable.

[0059] Alternatively, if Figure 5-Figure 8 As shown, the connection hole 121 is a stepped hole, and the aperture of each step of the stepped hole decreases from the end away from the coil assembly 2 to the end close to the coil assembly 2. The molten protrusion structure 211 can be filled in each step, increasing the contact area with the stepped hole and improving the connection strength. In this embodiment, Figure 5-Figure 7 As shown, the connection hole 121 is a T-shaped hole, which has a relatively simple structure and is relatively easy to prepare. In other embodiments, the connection hole 121 is not limited to a T-shaped hole, and can also be set to a structure with more steps.

[0060] Optionally, the outer diameter of the protruding structure 211 is greater than or equal to the aperture of the end of the connecting hole 121 close to the coil assembly 2. The above arrangement enables the protruding structure 211 to extend into the connecting hole 121. In this embodiment, the outer diameter of the protruding structure 211 is equal to the aperture of the end of the connecting hole 121 close to the coil assembly 2, and the melt of the protruding structure 211 will not flow to the plastic shell of the coil assembly 2 through the gap between the protruding structure 211 and the connecting hole 121. The outer diameter of the protruding structure 211 can also be slightly larger than the aperture of the end of the connecting hole 121 close to the coil assembly 2, so as to facilitate the installation of the protruding structure 211.

[0061] Optionally, the height of the protruding structure 211 is greater than the depth of the connecting hole 121. The above arrangement ensures that there is sufficient melt of the protruding structure 211 to fill the connecting hole 121. The specific height of the protruding structure 211 can be set according to demand, as long as it can fill the connecting hole 121.

[0062] Optionally, at least two connection holes 121 are provided, at least two protrusion structures 211 are provided, and each connection hole 121 corresponds to a protrusion structure 211, which increases the connection points and improves the connection strength between the cover plate 12 and the coil assembly 2. Figure 5 and Figure 6 As shown, two connection holes 121 are provided, and the two connection holes 121 are symmetrically arranged on the cover plate 12 .

[0063] In other embodiments, the number of connection holes 121 is not limited to two, and can also be three, four or more. When a plurality of connection holes 121 are provided, the plurality of connection holes 121 are arranged at equal intervals and can form a discontinuous annular structure. Of course, they may not be arranged in an annular structure. Preferably, the connection holes 121 are arranged at equal intervals and are located on the same circumference, and the enclosed circumference is concentric with the cover plate 12. This arrangement can make the connection and fixing force between the coil assembly 2 and the cover plate 12 more evenly distributed.

[0064] Alternatively, if Fig. 9 and Fig.10 As shown, the connection hole 121 can also be a continuous annular structure, and the protruding structure 211 is arranged corresponding to the connection hole 121. The connection hole 121 and the protruding structure 211 are continuous annular structures, and the cover plate 12 and the coil assembly 2 are matched and connected throughout the entire circumference, and the connection strength is good.

[0065] Furthermore, the connection holes 121 are provided in at least two circles, and the connection holes 121 are nested, which further increases the connection strength between the cover plate 12 and the coil assembly 2. Fig.11 and Fig.12As shown, the connection holes 121 are arranged in two circles, and the two circles of connection holes 121 are arranged in a nested manner and are arranged concentrically with the cover plate 12. In other embodiments, the connection holes 121 are not limited to being arranged in two circles, and can also be arranged in three circles, four circles or more circles.

[0066] Embodiment 2:

[0067] This embodiment provides an electromagnetic coil assembly. The difference between the electromagnetic coil assembly in this embodiment and the electromagnetic coil assembly in the first embodiment is that the electromagnetic coil assembly in the first embodiment is a stepped hole, while in this embodiment, Fig.13 As shown, the aperture of the connecting hole 121 gradually decreases from the end away from the coil assembly 2 to the end close to the coil assembly 2, that is, the side wall of the connecting hole 121 is an inclined surface. This structure can guide the molten molten protrusion structure 211 to fill the connecting hole 121 and improve the connection strength.

[0068] Embodiment three:

[0069] This embodiment provides an electromagnetic coil assembly. The difference between the electromagnetic coil assembly in this embodiment and the electromagnetic coil assembly in the first embodiment is that the electromagnetic coil assembly in the first embodiment is a stepped hole, while in this embodiment, Fig.14 As shown, one of the two opposite side walls of the longitudinal section of the connection hole 121 is a vertical side wall 1211, and the other side wall is a step side wall 1212, and the spacing between the groove walls of each level of the step groove of the step side wall 1212 and the vertical side wall 1211 decreases in the direction approaching the coil assembly 2. In this embodiment, the side wall on the right side of the two opposite side walls of the longitudinal section of the connection hole 121 is a vertical side wall 1211, and the side wall on the left side is a step side wall 1212, and the spacing between the groove walls of each level of the step groove of the step side wall 1212 and the vertical side wall 1211 decreases in the direction approaching the coil assembly 2. Fig.15 As shown, the step side wall 1212 is a T-shaped step groove, which has a simple structure and is easy to prepare. In other embodiments, the side wall on the right side of the longitudinal section of the connecting hole 121 can also be set as the step side wall 1212, and the side wall on the left side can be set as the vertical side wall 1211.

[0070] like Fig.16As shown, one of the two opposite side walls of the longitudinal section of the connection hole 121 is a vertical side wall 1211, and the other side wall is an inclined side wall 1213, and the inclined side wall 1213 gradually inclines toward the direction close to the vertical side wall 1211 along the direction close to the coil assembly 2. In this embodiment, the side wall on the right side of the connection hole 121 is a vertical side wall 1211, and the other side wall is an inclined side wall 1213, and the inclined side wall 1213 gradually inclines toward the direction close to the vertical side wall 1211 along the direction close to the coil assembly 2. In other embodiments, the side wall on the right side of the longitudinal section of the connection hole 121 can also be set as the inclined side wall 1213, and the side wall on the left side is provided with the vertical side wall 1211.

[0071] The above structure enables the connection between the connection hole 121 and the protruding structure 211 to form an asymmetric connection, which can effectively prevent the protruding structure 211 that has melted and then solidified from escaping from the connection hole 121, thereby improving the connection strength.

[0072] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The electromagnetic coil assembly is characterized in that: It comprises a magnetic conductive bracket (1) and a coil assembly (2), wherein the magnetic conductive bracket (1) comprises a bracket body (11) and cover plates (12) arranged at upper and lower ends of the bracket body (11), the bracket body (11) and the cover plate (12) enclosing a receiving space, and a part of the structure of the coil assembly (2) is accommodated in the receiving space; Each of the cover plates (12) is provided with a connection hole (121), and the hole diameter of the end of the connection hole (121) away from the coil assembly (2) is larger than the hole diameter of the end of the connection hole (121) close to the coil assembly (2); The coil assembly (2) is provided with a protruding structure (211), the protruding structure (211) can extend into the connecting hole (121), and the protruding structure (211) can be melted by hot melting and filled into the connecting hole (121), so as to connect the coil assembly (2) and the cover plate (12).

2. The electromagnetic coil assembly according to claim 1, characterized in that: The connection hole (121) is a stepped hole, and the aperture of each step of the stepped hole decreases from an end away from the coil assembly (2) to an end close to the coil assembly (2).

3. The electromagnetic coil assembly according to claim 2, characterized in that: The connecting hole (121) is a T-shaped hole.

4. The electromagnetic coil assembly according to claim 1, characterized in that: The diameter of the connection hole (121) gradually decreases from an end away from the coil assembly (2) to an end close to the coil assembly (2).

5. The electromagnetic coil assembly according to claim 1, characterized in that: One of the two opposite side walls of the longitudinal cross section of the connection hole (121) is a vertical side wall (1211), and the other side wall is a step side wall (1212) or a sloped side wall (1213); the spacing between the groove walls of each level of the step groove of the step side wall (1212) and the vertical side wall (1211) decreases in a direction approaching the coil assembly (2); and the sloped side wall (1213) gradually inclines in a direction approaching the vertical side wall (1211) in a direction approaching the coil assembly (2).

6. The electromagnetic coil assembly according to any one of claims 1 to 5, characterized in that: The outer diameter of the protruding structure (211) is greater than or equal to the diameter of the end of the connecting hole (121) close to the coil assembly (2).

7. The electromagnetic coil assembly according to any one of claims 1 to 5, characterized in that: The height of the protruding structure (211) is greater than the depth of the connecting hole (121).

8. The electromagnetic coil assembly according to any one of claims 1 to 5, characterized in that: The connection hole (121) is an annular structure, the protrusion structure (211) is an annular structure, and the protrusion structure (211) is arranged corresponding to the connection hole (121).

9. The electromagnetic coil assembly according to claim 8, characterized in that: The connection holes (121) are arranged in at least two circles, and the connection holes (121) are nested with each other.

10. The electromagnetic coil assembly according to any one of claims 1 to 5, characterized in that: At least two of the connection holes (121) are provided, and at least two of the protruding structures (211) are provided, and each of the connection holes (121) is provided corresponding to one of the protruding structures (211).

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