Coil structure suitable for 3D printing

Abstract

The utility model relates to a coil structure suitable for 3D printing, belongs to the technical field of coil equipment, and solves the problems that in the prior art, a Helmholtz coil is complex in supporting structure, tedious to process and install, uneven in magnetic field and the like. A coil structure suitable for 3D printing comprises a base assembly and two round coils partially embedded in the base assembly. The base assembly comprises two base bodies which are arranged in parallel, the upper surface of each base body is in an arc shape, and the lower surface of each base body comprises a middle straight section and symmetrical arc-shaped end portions on the two sides. The annular surfaces of the circular coils are perpendicular to the middle straight section of the base body, the two circular coils are coaxial, and the axial distance is equal to the outer radius of the circular coils. The Helmholtz coil is simple in structure and provides a uniform magnetic field.

Description

TECHNICAL FIELD

[0001] The utility model relates to coil equipment technical field especially relates to a coil structure suitable for 3D printing. BACKGROUND

[0002] In the field of scientific research and production, Helmholtz coil is often used. Helmholtz coil is a pair of coaxial circular coils with equal radius. The pair of coaxial coils are usually connected by connecting rod. In order to prevent the coil from rolling, the base is also needed. Therefore, in addition to processing the coil, some connecting rods, bases and other parts are also needed. These parts are assembled together to form a complete coil. This will cause some installation and matching problems, and the process is relatively complicated. SUMMARY

[0003] In view of the above analysis, the utility model aims at providing a coil structure suitable for 3D printing, so as to solve at least one of the problems of complex Helmholtz coil supporting structure, complicated processing and installation and uneven magnetic field.

[0004] The utility model mainly aims at realizing the following technical scheme:

[0005] A coil structure suitable for 3D printing, comprising a base assembly 3 and two circular coils 1 partially embedded in the base assembly;

[0006] The base assembly 3 comprises two base bodies arranged in parallel, the upper surface 301 of each base body is arc-shaped, and the lower surface comprises a middle flat section 302 and two symmetrically arranged arc-shaped end portions 303;

[0007] The circular coil 1 is perpendicular to the middle flat section 302 of the base body, and the two circular coils 1 are coaxial with an axial spacing equal to the outer radius of the circular coil 1.

[0008] Preferably, the outer side edge of the embedded part of the circular coil 1 and the end point of the middle flat section 302 are aligned.

[0009] Further, a slanting winding groove 2 is engraved on each circular coil 1 along the circumference.

[0010] Specifically, the angle θ between the center line of the cross section width direction of the slanting winding groove 2 and the common axis of the two circular coils is 63.4±8°.

[0011] Exemplarily, the ratio of the depth to the width of the slanting winding groove is greater than or equal to 1.

[0012] It should be noted that the two circular coils on the base assembly are mirror-symmetric.

[0013] Further, each of the two circular coils 1 is provided with a threading hole 4.

[0014] Preferably, the threading holes 4 on the two circular coils are aligned with each other, and the line connecting the two holes is parallel to the central axis of the two circular coils.

[0015] Further, the coil structure comprises a base assembly and two groups of coils, the two groups of coils are arranged perpendicular to each other to form an orthogonal symmetric structure, and one group of coils is partially embedded on the base assembly.

[0016] Each group of coils comprises two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetrical manner, and the axial spacing of the two circular coils is equal to the outer radius of the group of circular coils; the diameters of the three groups of coils are the same or different.

[0017] Further, the coil structure comprises a base assembly and three groups of coils, the three groups of coils are arranged perpendicular to each other to form an orthogonal symmetric structure, and one group of coils is partially embedded on the base assembly.

[0018] Each group of coils comprises two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetrical manner, and the axial spacing of the two circular coils is equal to the outer radius of the group of circular coils; the diameters of the three groups of coils are the same or different.

[0019] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0020] 1. The base structure of the Helmholtz coil is optimized, the coil and the base can be integrally formed by 3D printing, multiple components are integrated into one part, complex assembly and assembly are not required, time and assembly cost are greatly saved.

[0021] Moreover, the base and the coil structure can reduce stress concentration, uniformly disperse weight, and improve the stability of the overall structure during 3D printing.

[0022] 2. The oblique winding grooves are engraved on each circular coil along the circumference, and the included angle between the oblique winding grooves and the horizontal direction is optimized, so that the axial spacing of each group of coaxial circular coils is equal to the outer radius of the circular coil after the wire is wound, and the magnetic field precision and uniformity are effectively improved.

[0023] 3. The threading mode between the coils is optimized, that is, a threading hole is arranged on each coil, and the threading holes on the coils are aligned with each other, so that the line connecting the two holes is parallel to the central axis of the coil group. Such threading mode simplifies the processing process of the Helmholtz coil and minimizes the influence on the magnetic field of the whole system.

[0024] 4. The present application can realize the connection and orthogonalization of multiple groups of coils, generate multiple magnetic fields perpendicular to each other, and widen the application range.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0027] Figure 1 This is a schematic diagram of the structure of a set of coils according to this utility model;

[0028] Figure 2a This is a front view of the structure of a set of coils according to this utility model;

[0029] Figure 2b This utility model Figure 2a Sectional view along line AA;

[0030] Figure 2c This utility model Figure 2b Enlarged view of a section at point I;

[0031] Figure 3 This is a schematic diagram of the structure of the two sets of coils of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the three sets of coils of this utility model.

[0033] Figure label:

[0034] 1-Circular coil; 2-Angled winding groove; 3-Base assembly; 301-Upper surface; 302-Straight middle section; 303-Arched end; 4-Threading hole. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0036] A specific embodiment of this utility model discloses a coil structure suitable for 3D printing, including a base assembly 3 and two circular coils 1 partially embedded in the base assembly;

[0037] The base assembly 3 comprises two base bodies arranged in parallel, the upper surface 301 of each base body is arc-shaped, and the lower surface comprises a middle flat section 302 and two symmetrically arranged arc-shaped end portions 303;

[0038] The annular surface of the circular coil 1 is perpendicular to the middle flat section 302 of the base body, and the two coaxial circular coils 1 have an axial spacing equal to the outer radius of the circular coil 1.

[0039] The outer edge of the embedded part of the circular coil 1 and the base body is aligned with the end point of the middle flat section 302.

[0040] By optimizing the base structure of the Helmholtz coil, the coil and the base can be integrally formed by 3D printing, and multiple components can be integrated into one part, without the need for complex assembly and assembly, greatly saving time and assembly cost; during 3D printing, the arc-shaped design of the upper surface and the arc-shaped end portion of the lower surface can effectively reduce stress concentration and uniformly distribute weight, improving the stability of the overall structure.

[0041] Further, an inclined winding groove 2 is engraved on each circular coil 1 along the circumference, and the included angle θ between the center line of the cross section of the inclined winding groove 2 and the common axis of the two circular coils is 63.4±8°.

[0042] In one possible design, the cross section of the inclined winding groove 2 is a rectangular cross section with a smooth bottom edge; in one possible design, the cross section of the inclined winding groove 2 is a rectangle.

[0043] The ratio of the depth to the width of the inclined winding groove 2 is greater than or equal to 1.

[0044] The depth of the inclined winding groove 2 should be sufficient to accommodate a predetermined number of windings without penetrating the base of the circular coil.

[0045] It should be noted that the two circular coils on the base assembly are mirror-symmetric.

[0046] The design and angle optimization of the inclined winding groove ensure that the axial spacing of each group of coaxial circular coils is equal to the outer radius of the circular coil after the wire is wound, effectively improving the accuracy and uniformity of the magnetic field.

[0047] Specifically, the length of the middle flat section 302 of the lower surface of each base body is equal to the outer radius of the circular coil 1.

[0048] Further, the spacing between the two parallel base bodies is 0.5-1 times the outer radius of the circular coil 1.

[0049] In one possible design, the two circular coils are coaxial and have an axial spacing equal to the outer radius of the circular coils, the length of the middle flat section of the lower surface of each base body is equal to the outer radius of the circular coils, and the spacing between the two parallel base bodies is equal to the outer radius of the circular coils, so that each circular coil is placed behind the base assembly, and the circle center and the two connection points between the circular coil and the clamping slot form an equilateral triangle, thereby improving the structural stability.

[0050] Preferably, the width of the base body is 1-1.5 times the diameter of the circular cross section of the circular coil. This makes the weight distribution of the circular coil on the base body more uniform, which helps to improve the stability of the entire structure.

[0051] Further, each circular coil is provided with a threading hole 4, and the threading holes 4 of the two circular coils are aligned with each other, and the line connecting the two holes is parallel to the central axis of the two circular coils.

[0052] Due to the alignment of the threading holes and the parallelism of the connecting line and the central axis, the magnetic field lines between the circular coils can be reduced, and the uniformity of the magnetic field is further improved; the threading holes are designed to be aligned with each other, and the circular coils are easier to position, thereby simplifying the processing of the Helmholtz coil.

[0053] Preferably, as shown in Figure 3 the coil structure includes a base assembly and two sets of coils, the two sets of coils are arranged perpendicular to each other to form an orthogonal symmetric structure, and one set of coils is partially embedded in the base assembly;

[0054] Each set of coils includes two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetrical manner, and the axial spacing of the two circular coils is equal to the outer radius of the circular coils in this set;

[0055] The diameters of the two sets of coils are the same or different.

[0056] The two sets of coils are orthogonal to each other and can generate two magnetic fields perpendicular to each other.

[0057] Further, as shown in Figure 4 the coil structure includes a base assembly and three sets of coils, the three sets of coils are arranged perpendicular to each other to form an orthogonal symmetric structure, and one set of coils is partially embedded in the base assembly;

[0058] Each set of coils includes two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetrical manner, and the axial spacing of the two circular coils is equal to the outer radius of the circular coils in this set;

[0059] The diameters of the three sets of coils are the same or different.

[0060] The three sets of coils are orthogonal to each other and can generate three magnetic fields perpendicular to each other.

[0061] The design of the two or three groups of coils provides wider application prospects for scientific research, industrial application, medical equipment and other fields, and provides new possibilities for creating and controlling complex magnetic field environments.

[0062] Embodiments

[0063] As shown in Figure 1 and Figure 2a , Figure 2b , a coil structure suitable for 3D printing includes a base assembly 3 and two circular coils 1 partially embedded in the base assembly; the base assembly 3 includes two base bodies arranged in parallel, the upper surface 301 of each base body is arc-shaped, and the lower surface includes a middle flat section 302 and two symmetrically arranged arc-shaped end portions 303; the circular coil 1 ring surface is perpendicular to the middle flat section 302 of the base body, the two circular coils 1 are coaxial, and the axial spacing is equal to the outer radius of the circular coil 1; the outer side edge of the embedded part of the circular coil 1 and the base body is aligned with the end point of the middle flat section 302.

[0064] As shown in Figure 2c , a slanted winding groove 2 is engraved on each circular coil 1 along the circumference, the center line of the cross section of the slanted winding groove 2 is at an angle θ of 63.4° with the common axis of the two circular coils; the cross section of the slanted winding groove 2 is rectangular, the depth is 6mm, and the width is 1mm, that is, the ratio of depth to width is 6.

[0065] The two circular coils are coaxial and the axial spacing is equal to the outer radius of the circular coil, the length of the middle flat section of the lower surface of each base body is equal to the outer radius of the circular coil, and the spacing between the two parallel base bodies is equal to the outer radius of the circular coil. The width of the base body is equal to the diameter of the circular cross section of the circular coil.

[0066] Each circular coil is provided with a threading hole 4, and the threading holes 4 on the two circular coils are aligned with each other, and the line connecting the two holes is parallel to the central axis of the two circular coils.

[0067] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A coil structure suitable for 3D printing, characterized in that, The coil structure comprises a base assembly and two groups of coils, the two groups of coils are arranged perpendicularly to each other to form an orthogonal symmetric structure, and one group of coils is partially embedded in the base assembly; The base assembly comprises two base bodies arranged in parallel, the upper surface (301) of each base body is arc-shaped, and the lower surface comprises a middle flat section (302) and two symmetrically arranged arc-shaped end portions (303); The annular surface of the circular coil (1) is perpendicular to the middle flat section (302) of the base body, the two circular coils (1) are coaxial, and the axial distance is equal to the outer radius of the circular coil (1).

2. The coil structure of claim 1, wherein, The outer side edge of the embedded part of the circular coil (1) and the base body is aligned with the end point of the middle flat section (302).

3. The coil structure of claim 2, wherein, An inclined winding groove (2) is engraved on each circular coil (1) along the circumference.

4. The coil structure of claim 3, wherein, The angle θ between the center line of the cross-sectional width direction of the inclined winding groove (2) and the common axis of the two circular coils is 63.4±8°.

5. The coil structure of claim 4, wherein, The ratio of the depth to the width of the inclined winding groove is greater than or equal to 1.

6. The coil structure of claim 2, wherein, The two circular coils on the base assembly are mirror-symmetric.

7. The coil structure of claim 6, wherein, Each of the two circular coils (1) is provided with a threading hole (4).

8. The coil structure of claim 7, wherein, The threading holes (4) on the two circular coils are aligned with each other, and the connecting line of the two holes is parallel to the central axis of the two circular coils.

9. The coil structure of claim 1, wherein, The coil structure comprises a base assembly and two groups of coils, the two groups of coils are arranged perpendicularly to each other to form an orthogonal symmetric structure, and one group of coils is partially embedded in the base assembly; Each group of coils comprises two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetric manner, and the axial distance of the two circular coils is equal to the outer radius of the circular coil in this group; the diameters of the two groups of coils are the same or different.

10. The coil structure of claim 1, wherein, The coil structure comprises a base assembly and three groups of coils, the three groups of coils are arranged perpendicularly to each other to form an orthogonal symmetric structure, and one group of coils is partially embedded in the base assembly; Each group of coils comprises two circular coils with equal diameters, the two circular coils are coaxial and arranged in a mirror-symmetric manner, and the axial distance of the two circular coils is equal to the outer radius of the circular coil in this group; the diameters of the three groups of coils are the same or different.

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