Magnet assembly, and assembly device and manufacturing method therefor

Abstract

The present invention relates to a device for assembling a magnet assembly and a manufacturing method therefor. The device for assembling a magnet assembly according to the present invention comprises: a body comprising a cavity into which a yoke and a plurality of magnets are sequentially inserted; and an upper cover covering the body, wherein the size of an opening of the upper cover may be smaller than the size of the upper surface of the cavity and larger than the size of the magnets to be secondarily inserted.

Description

Magnet assembly and assembly device and manufacturing method

[0001] The present invention relates to a magnet assembly, an assembly device, and a method for manufacturing the same.

[0002] When using multiple magnets, the strength of the magnetic field varies depending on the arrangement of the magnets.

[0003] Figure 1 is a drawing showing a magnet assembly arranged in a Halbach array.

[0004] Referring to FIG. 1, a plurality of magnets (501, 502, 503) are arranged with magnetic fluxes in different directions to form a magnet section (500a) arranged in a Halbach array.

[0005] A Halbach arrangement is a plurality of magnets (501, 502, 503) arranged in a horizontal direction so as to be in contact with each other, while rotating the magnets (501, 502, 503) along the horizontal direction in a counterclockwise (or clockwise) direction. At this time, the upper surface of each magnet (501, 502, 503) is arranged so that its polarity (S, N) is the same as the upper surface of any one of the magnets (501, 502, 503) adjacent in the horizontal direction.

[0006] A magnet section (500a) in which multiple magnets are arranged in a Halbach array as in (a) of Fig. 1 exhibits a magnetic flux distribution as in (b).

[0007] In this way, the magnet section (500a) arranged in a Halbach array has a larger magnetic field on the upper side and a smaller magnetic field on the lower side compared to when arranged in the same direction. As the lower magnetic field decreases, the upper magnetic field increases. Theoretically, the upper magnetic field can increase by up to 2 times. In this way, the magnet section arranged in a Halbach array can arrange multiple magnets in a specific direction to concentrate the magnetic force in the direction where magnetic force is needed and reduce the magnetic force in the direction where magnetic force is not needed. However, when magnets are joined, the magnetized directions are different, so a repulsive force is generated in the vertical direction, causing them to be pushed upward.

[0008] Although magnets arranged in a Halbach array can dramatically improve magnetic performance, there is a problem with low productivity and high manufacturing costs.

[0009] It is necessary to develop technologies that can improve these problems and increase productivity.

[0010] The technical problem that the present invention aims to solve is to provide an assembly device and a manufacturing method that can easily assemble a magnet assembly including a yoke and a plurality of magnets coupled to the yoke, thereby increasing the productivity of the assembly process of a magnet assembly satisfying a Halbach arrangement.

[0011] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below.

[0012] The magnet assembly assembly device of the present invention for solving the above technical problem comprises a body including a yoke and a cavity into which a plurality of magnets are sequentially inserted, and an upper cover covering the body, wherein the size of the opening of the upper cover is smaller than the size of the upper surface of the cavity and may be larger than the magnet inserted secondarily.

[0013] In some embodiments of the present invention, the upper cover may compress some of the magnets inserted first.

[0014] In some embodiments of the present invention, a fixing magnet may be placed on the side of the cavity.

[0015] In some embodiments of the present invention, the polarity of the fixing magnet may be arranged to have an attractive force with the magnet inserted into the cavity.

[0016] In some embodiments of the present invention, the body may be formed of a non-magnetic material.

[0017] In some embodiments of the present invention, an injection needle for applying adhesive may be included.

[0018] In some embodiments of the present invention, the amount of adhesive applied can cover 70 to 90% of the area of ​​the lower surface of the magnet with a thickness of 8 to 10 μm.

[0019] The method for manufacturing a magnet assembly according to the present invention for solving the above technical problem may include the steps of: inserting a yoke and applying a measured amount of adhesive to the upper surface of the flat plate of the yoke (S10); inserting a first and a third magnet into the left and right sides of the cavity, respectively, and pressing the magnets with an upper cover (S20); inserting a second magnet between the first and third magnets through an opening of the upper cover (S30); and discharging a cured magnet assembly (S40).

[0020] The magnet assembly of the present invention for solving the above technical problem comprises a yoke and a plurality of magnets, and can be assembled using an assembly device or manufacturing method of any one of the above claims.

[0021] According to the magnet assembly, assembly device, and manufacturing method of the present invention, by enabling a plurality of magnets to be easily attached to the yoke of the magnet assembly in a Halbach arrangement, the productivity of the assembly process of the magnet assembly arranged in the yoke and Halbach arrangement can be increased. Accordingly, the competitiveness of the magnet assembly can be expanded by strengthening the magnetic force in the required direction and reducing the magnetic force in the unnecessary direction.

[0022] Figure 1 is a drawing showing a magnet section arranged in a Halbach array.

[0023] FIG. 2 is a drawing showing a magnet assembly according to one embodiment of the present invention.

[0024] FIG. 3 is an assembly device for manufacturing a magnet assembly according to one embodiment of the present invention.

[0025] FIGS. 4 to 6 are drawings illustrating a method for manufacturing a magnet assembly according to an embodiment of the present invention.

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0027] "And / or" includes each of the mentioned items and all combinations of one or more.

[0028] The terms used herein are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprising" and / or "comprising" does not exclude the presence or addition of one or more other components, steps, actions, and / or elements to the mentioned components, steps, actions, and / or elements.

[0029] Furthermore, throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly" or "electrically connected" with other members or elements interposed between them.

[0030] Additionally, throughout the specification, the description that each layer (film), region, pattern, or structure is formed "on" or "under" the substrate, each layer (film), region, pad, or pattern includes both direct formation and formation through another layer. The criteria for "on" or "under" each layer are described based on the drawings.

[0031] Furthermore, expressions such as 'first, second,' etc., are used solely to distinguish multiple compositions and do not limit the order or other characteristics between the compositions.

[0032] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0033] In FIGS. 2 to 5, the positive direction of the Z-axis is set to upward and the negative direction to downward, the positive direction of the X-axis to the right and the negative direction to the left, and the negative direction of the Y-axis to the front and the positive direction to the rear.

[0034] FIG. 2 is a drawing showing a magnet assembly according to one embodiment of the present invention.

[0035] Referring to FIG. 2, the magnet assembly (500) may include a magnet part (500a) comprising a plurality of magnets (501, 502, 503) arranged in a Halbach array, and a yoke (510).

[0036] Referring to FIG. 2(a), a plurality of magnets (501, 502, 503) may be arranged in a first direction (e.g., the x-axis of FIG. 2) so as to be in contact with each other, and the magnets (501, 502, 503) may be rotated counterclockwise (or clockwise) along the first direction to form a Halbach arrangement. In addition, the upper surface of each magnet (501, 502, 503) may be arranged with the same polarity (S, N) as the upper surface of any one of the magnets (501, 502, 503) adjacent in the first direction. Furthermore, the lower surface of each magnet (501, 502, 503) is characterized by having a different polarity (S, N) as the lower surface of any one of the magnets (501, 502, 503) adjacent in the first direction. In this case, if the upper surface or the lower surface includes two polarities, the upper surface or the lower surface may refer to a portion of the area that contacts another magnet in the first direction.

[0037] According to the embodiment, the second magnet (502) has an S pole located on its upper surface, and the area of ​​the upper surface of the first magnet (501) adjacent to one side of the second magnet (502) that contacts the upper surface of the second magnet (502) has an S pole located in the same manner. Also, the area of ​​the upper surface of the third magnet (503) adjacent to the other side of the second magnet (502) that contacts the upper surface of the second magnet (502) has an S pole located in the same manner. Therefore, the first to third magnets (501, 502, 503) can be formed in a shape in which S poles are gathered on their upper surfaces and arranged in a Halbach arrangement.

[0038] The magnet section arranged in this way, using a Halbach array, can arrange multiple magnets in a specific direction to concentrate magnetic force in the direction where it is needed and reduce magnetic force in the direction where it is not needed.

[0039] The above yoke (510) may include a flat plate that contacts the lower surface of the magnet part (500a) and a reinforcing part that contacts the left and right sides of the magnet part (500a) and simultaneously contacts the front and back surfaces.

[0040] That is, it can be formed by wrapping the left and right sides in the length direction (X-axis direction) of the magnet part (500a) and bending upward (Z-axis direction), and also wrapping the front and back sides in the width direction (Y-axis direction) of the magnet part (500a) and bending upward (Z-axis direction), and the height of the reinforcing part can be formed to be equal to the height of the magnet part (500a).

[0041] Therefore, the yoke (510) may be a hollow cuboid shape that opens the upper part of the magnet part (500a) and contacts the remaining five sides. Thus, the magnets (501, 502, 503) inserted into the yoke (510) can be restrained from being pushed out in all directions except the upward direction.

[0042] Also, the yoke (510) can shield by amplifying the magnetic flux density in the direction toward the open side and reducing the magnetic flux density in the direction toward the contact side.

[0043] When a yoke (510) is brought into contact with a magnet part (500a) using a magnetic material, the yoke (510) absorbs magnetic field lines, thereby shielding the magnetic force in the direction to which the yoke (510) is attached and amplifying the magnetic force in the direction not to which the yoke (510) is attached. Therefore, the magnetic flux density in the direction not to which the yoke (510) is attached increases, and the magnetic flux density in the direction to which the yoke (510) is attached decreases.

[0044] As such, the magnet assembly (500) according to the embodiment can concentrate magnetic force in the direction where magnetic force is needed and reduce magnetic force in the direction where magnetic force is not needed by applying a Halbach array and a yoke.

[0045] A magnet assembly assembly device according to the present invention will be described with reference to the drawings.

[0046] FIG. 3 is an assembly device for manufacturing a magnet assembly according to one embodiment of the present invention, and FIG. 4 to 6 are drawings showing a method for manufacturing a magnet assembly according to one embodiment of the present invention.

[0047] Referring to FIGS. 3 to 6, the magnet assembly assembly device according to the present invention comprises a body (100) including a yoke (510) and a cavity (101) into which a plurality of magnets (501, 502, 503) are sequentially inserted, and an upper cover (200) covering the body (100). The size of the opening (201) of the upper cover (200) may be smaller than the size of the upper surface of the cavity (101) and larger than the magnet (503) inserted secondarily.

[0048] Since a yoke (510) is inserted into the cavity (101) of the body (100) and a magnet (501, 502, 503) is inserted into the yoke (510), it is preferable that the body (100) be formed of a non-magnetic material so that magnetic interference does not occur during the insertion and discharge of the magnet (501, 502, 503). For example, it may be formed of a non-magnetic metal such as aluminum or copper or plastic.

[0049] The cavity (101) may be provided with an empty space in the shape of a cuboid with an open top so that a yoke (510) can be inserted. Therefore, since a space must be secured to accommodate the inserted yoke (510), it may be formed as a space larger than the yoke (510), but within an allowable error range so that the received yoke (510) does not move after insertion, for example, the width, length, and height may each be larger than the width, length, and height of the yoke (510).

[0050] A yoke (510) is inserted into the cavity (101), an adhesive (Ad) is applied to the upper surface of the flat plate of the yoke (510), and a first magnet (501) that contacts the left end of the yoke (510) and a third magnet (503) that contacts the right end of the yoke (510) can be inserted first.

[0051] After the first and third magnets (501, 503) are inserted, the upper cover (200) moves downward to press the first inserted magnets (501, 503) so that they do not move.

[0052] The upper cover (200) can be moved downward by sliding the first support (121) and the second support (122), which are vertically arranged on the upper surface of the body (100). To this end, a through hole through which the first support (121) and the second support (122) pass may be formed in the upper cover (200).

[0053] The size of the opening (201) of the upper cover (200) is smaller than the size of the upper surface of the cavity (101), so that the area between the opening (201) of the upper cover (200) and the outer edge of the upper cover (200) can press against the upper surface of the first and third magnets (501, 503) that are inserted first.

[0054] Next, a second magnet (502) can be inserted secondarily through the opening (201) of the upper cover (200). At this time, the size of the opening (201) of the upper cover (200) is provided to be larger than the size of the upper surface of the second magnet (502) so that the second magnet (502) can be inserted through the opening (201).

[0055] The second magnet (502) inserted secondly can also be seated on the yoke (510) and combined with the first and third magnets (501, 503) inserted firstly.

[0056] In order to fix the first and third magnets (501, 503) inserted in the first step without movement, the body (100) may further be provided with first and second fixing magnets (111, 112) that pull the first and third magnets (501, 503) by force.

[0057] The first and second fixing magnets (111, 112) may be placed in contact with the left and right sides of the cavity (101). At this time, the polarities of the fixing magnets (111, 112) may be arranged with opposite polarities to have an attractive force with the first and second magnets (501, 502) inserted into the cavity (101).

[0058] According to the embodiment, a first magnet (501) is positioned on the left side of the cavity (101), and since the N pole of the first magnet (501) contacts the left side of the cavity (101), the first fixing magnet (111) is positioned so that the S pole contacts the left side of the cavity (101).

[0059] Additionally, a third magnet (503) is positioned on the right side of the cavity (101), and since the N pole of the third magnet (503) contacts the right side of the cavity (101), the second fixing magnet (112) is positioned so that the S pole contacts the right side of the cavity (101).

[0060] The yoke (510) and magnets (501, 502, 503) can be attached using an adhesive (Ad) and then the adhesive (Ad) can be cured to permanently fix them.

[0061] In order to apply adhesive (Ad) to the upper surface of the flat plate of the yoke (510), the assembly device according to the present invention may include an injection needle (130) for applying adhesive (Ad).

[0062] In the adhesive application process, a predetermined amount of adhesive (Ad) can be injected into the upper surface of the flat plate of the yoke (510) through the injection needle (130).

[0063] Since the adhesive (Ad) is applied in an amount suitable for covering at least 70% of the upper surface of the plate without being over-applied or overflowing, a corresponding amount can be supplied using a device such as an injection needle.

[0064] The amount of adhesive (Ad) to be added can be determined to cover 70 to 90% of the area of ​​the lower surface of the magnet (501, 502, 503) and the upper surface of the flat plate of the yoke (510) with a thickness of 8 to 10 μm. This is because it is possible to maximize adhesive strength with an appropriate thickness and area while simultaneously preventing the adhesive (Ad) from overflowing to the outside of the assembly.

[0065] In this way, the magnet assembly (500) according to the present invention may have an adhesive (Ad) layer disposed between the lower surface of the magnet (501, 502, 503) and the upper surface of the flat plate of the yoke (510) covering 70 to 90% of the area with a thickness of 8 to 10 μm.

[0066] The adhesive (Ad) used in the present invention is not particularly limited as long as it can secure the adhesive strength of the finished assembly.

[0067] However, to reduce the processing time required for the curing process, it is desirable that the curing be completed to a level of 70% or more within 20 minutes and that the liquid flow be controlled due to viscosity. For example, 3M’s DP420 Epoxy Adhesive can be used.

[0068] Referring to FIGS. 4 to 6, the method for manufacturing a magnet assembly according to the present invention may include the steps of: inserting a yoke (510) and applying a measured amount of adhesive (Ad) to the upper surface of a flat plate of the yoke (510) (S10); inserting a first and third magnet (501, 503) into the left and right sides of a cavity (101), respectively, and pressing the magnets (501, 503) with an upper cover (200) (S20); inserting a second magnet (502) between the first and third magnets (501, 503) through an opening (201) of the upper cover (200) (S30); and discharging a cured magnet assembly (500) (S40).

[0069] Referring to FIG. 4, step S10 can be performed by inserting a yoke (510) and applying a measured amount of adhesive to the upper surface of the flat plate of the yoke (510). At this time, the amount of adhesive (Ad) applied can cover 70 to 90% of the area of ​​the lower surface of the magnet with a thickness of 8 to 10 μm, as described above.

[0070] The adhesive (Ad) can be applied in a measured amount using an injection needle (130).

[0071] Referring to FIG. 5, the first and third magnets (501, 503) can be inserted into the left and right sides of the cavity (101), respectively, and the magnets (501, 503) can be pressed against the upper cover (200) in step (S20). The upper cover (200) moves downward to press the first and third magnets (501, 503) and can be fixed simultaneously by the adhesive force of the adhesive (Ad). In particular, when the first and second fixing magnets (111, 112) are provided, the first and third magnets (501, 503) can be prevented from moving and fixed more securely by the attractive force of the first and second fixing magnets (111, 112).

[0072] In addition, the upper cover (200) can move downward to press and fix the first and third magnets (501, 503).

[0073] Referring to FIG. 6, a step (S30) of inserting a second magnet (502) between the first and third magnets (501, 503) through the opening (201) of the upper cover (200) can be performed.

[0074] After performing step S30 and after the curing time of the adhesive (Ad) has elapsed, step S40, in which the upper cover (200) moves upward to discharge the magnet assembly (500), can be performed last.

[0075] In this way, by using a magnet assembly assembly device to easily arrange and attach magnets in a Halbach arrangement to a yoke, the productivity of the magnet assembly assembly process can be increased.

[0076] Although the present invention has been described above, those skilled in the art will recognize that the invention may be implemented in other forms while maintaining the technical concept and essential features of the invention.

[0077] The scope of the present invention shall be defined by the claims, but all modifications or variations derived from configurations directly derived from the descriptions in the claims, as well as configurations equivalent thereto, shall be interpreted as being included within the scope of the present invention.

Claims

1. A body comprising a yoke and a cavity into which a plurality of magnets are sequentially inserted; and It includes an upper cover that covers the above body, and A magnet assembly assembly device in which the size of the opening of the upper cover is smaller than the size of the upper surface of the cavity and larger than the magnet inserted secondarily.

2. In Paragraph 1, The above upper cover is a magnet assembly assembly device that compresses a portion of the magnets inserted in the first step.

3. In Paragraph 1, A magnet assembly assembly device in which a fixing magnet is disposed on the side of the above cavity.

4. In Paragraph 3, A magnet assembly assembly device in which the polarity of the above-mentioned fixed magnet is arranged to have an attractive force with the magnet inserted into the cavity.

5. In Paragraph 1, The above body is formed of a non-magnetic material, forming a magnet assembly assembly device.

6. In Paragraph 1, A magnet assembly assembly device including an injection needle for applying adhesive.

7. In Paragraph 6, A magnet assembly assembly device in which the amount of adhesive applied is such that it can cover 70 to 90% of the area of ​​the lower surface of the magnet with a thickness of 8 to 10 μm.

8. A step of inserting a yoke and applying a measured amount of adhesive to the upper surface of the yoke's flat plate (S10); Step (S20) of inserting the first and third magnets into the left and right sides of the cavity, respectively, and pressing the magnets with the upper cover; A step (S30) of inserting a second magnet between the first and third magnets through the opening of the upper cover; and A method for manufacturing a magnet assembly, comprising the step (S40) of discharging a hardened magnet assembly.

9. A magnet assembly assembled using the assembly device of any one of claims 1 to 7 or the manufacturing method of claim 8.

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