Magnet arrangement method, rotor manufacturing method, magnet arrangement jig, and magnet induction device

Abstract

This disclosure provides a magnet arrangement method capable of precisely arranging magnets in defined positions. One aspect of this disclosure is a method for arranging multiple magnets, comprising an arrangement process of arranging multiple magnets (1) in a magnet arrangement fixture (2) made of a magnetic body. In the arrangement process, with the magnet to be newly arranged (1b) in contact with and attracted to the magnet arrangement fixture (2), the magnet to be newly arranged (1b) is moved along the axial direction of its magnetic flux circuit to become adjacent to the already arranged magnet (1a) in such a way that the magnetic flux circuit of the magnet to be newly arranged (1b) overlaps with the magnetic flux circuit of the magnet already arranged in the magnet arrangement fixture (2).

Description

Technical Field

[0001] This disclosure relates to a method for arranging magnets, a method for manufacturing a rotor, a magnet arranging fixture, and a magnet induction device. Background Technology

[0002] When magnets are arranged on a rotor core and then magnetized, sometimes the magnets are not magnetized with high precision. Therefore, pre-magnetized magnets (i.e., magnetized magnets) are arranged and fixed to the rotor core. For example, in Patent Document 1, a magnet unit is wound around the rotor core. This magnet unit is a unit on a plate made of an iron strip with multiple magnetized magnets fixed to it with epoxy resin. Furthermore, in Patent Document 2, the main pole permanent magnet and the auxiliary pole permanent magnet are fixed to the back magnetic yoke by the concave and convex features of the back magnetic yoke.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-107929

[0006] Patent Document 2: Japanese Patent Application Publication No. 2007-110822 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The applicant has discovered the following problem. When magnetized magnets are arranged, attractive and repulsive forces are generated between adjacent magnetized magnets, making it difficult to arrange the magnetized magnets in a specific position with high precision.

[0009] This disclosure was made in view of the following problem: a magnet arrangement method, a rotor manufacturing method, a magnet arrangement fixture, and a magnet induction device that can arrange magnetized magnets in a defined position with high precision.

[0010] Solution for solving the problem

[0011] One method of magnet arrangement disclosed herein is a method of arranging multiple magnetized magnets, wherein...

[0012] The magnet arrangement method includes an arrangement process of arranging the plurality of magnetized magnets in a magnet arrangement fixture made of magnetic materials.

[0013] In the arrangement process, with the magnet to be newly arranged in contact with and attracted to the magnet arrangement fixture, the magnet to be newly arranged is moved along the axial direction of its magnetic flux circuit to become adjacent to the already arranged magnet, in such a way that the magnetic flux circuit of the magnet to be newly arranged overlaps with the magnetic flux circuit of the magnet already arranged in the magnet arrangement fixture.

[0014] In the above-described magnet arrangement method, it is preferable that the magnet arrangement fixture has a groove.

[0015] The magnets to be newly arranged are arranged such that the slot is positioned at the boundary portion of the adjacent magnets when the magnetized magnets are already arranged.

[0016] One embodiment of the present disclosure describes a method for manufacturing a rotor that includes the aforementioned magnet arrangement method.

[0017] One aspect of this disclosure is a magnet arrangement fixture for arranging magnetized magnets, wherein...

[0018] The magnet arrangement clamp includes a first clamp made of magnetic material.

[0019] The magnetized magnets are arranged on the surface of the first clamp, and the surface of the first clamp has grooves that are disposed at the boundary portions of adjacent magnetized magnets when the magnetized magnets are arranged.

[0020] The magnet arranging fixture has an insertion portion on one side of one end of the groove in the direction of extension, the insertion portion for inserting the magnetized magnet to arrange the magnetized magnet on the surface of the first fixture.

[0021] Preferably, the aforementioned magnet arrangement clamp includes a second clamp made of a magnetic body.

[0022] The second clamp is disposed relative to the first clamp on one side of the opposite end of the first clamp in the direction in which the groove extends.

[0023] The second clamp protrudes from the surface of the first clamp on one side where the groove is formed, so as to allow the insertion direction side end of the magnetized magnet to contact.

[0024] One aspect of this disclosure is a magnet induction device for inducing magnetization of a magnet, wherein...

[0025] The magnet-inducing device includes:

[0026] The guide section guides the magnetized magnet;

[0027] Inducing magnet, thereby inducing the magnetized magnet by magnetic force; and

[0028] The pressing section presses the magnetized magnet in such a way that the magnetic flux circuit of the magnetized magnet overlaps with the magnetic flux circuit of the inducing magnet, pressing the magnetized magnet in the axial direction of the magnetic flux circuit of the magnetized magnet.

[0029] In the above-described magnet induction device, it is preferable that the induction magnets are arranged on both sides of the guide portion when viewed in the direction in which the magnetized magnet is pressed in.

[0030] Invention Effects

[0031] According to this disclosure, a magnet arrangement method, a rotor manufacturing method, a magnet arrangement fixture, and a magnet induction device are available, which enable magnetized magnets to be arranged in a defined position with high precision. Attached Figure Description

[0032] Figure 1 This is a perspective view showing the arrangement of magnetized magnets to be newly arranged in the magnet arrangement fixture in the magnet arrangement method of Embodiment 1.

[0033] Figure 2 This is a diagram showing the state of the magnetized magnets to be newly arranged in the magnet arrangement fixture, viewed from the Z-axis+ side, in the magnet arrangement method of Embodiment 1.

[0034] Figure 3 It is an XY cross-sectional view showing the force relationship when magnetized magnets are arranged in a magnet arrangement fixture.

[0035] Figure 4 This diagram illustrates the magnetic flux loops between magnetized magnets when the newly arranged magnetized magnets are brought closer to the already arranged magnetized magnets on the X-axis + side.

[0036] Figure 5 This diagram illustrates the arrangement of magnetized magnets using the magnet arrangement device of Embodiment 2.

[0037] Figure 6 This is a three-dimensional view of the arrangement of magnetized magnets as seen from the Z-axis + side.

[0038] Figure 7 This is a diagram showing the state of contact between the magnetized magnet and the magnet arrangement fixture, viewed from the Y-axis side.

[0039] Figure 8 This is a diagram showing the arrangement of magnetized magnets as viewed from the Y-axis side.

[0040] Figure 9 This is a perspective view of the magnet-inducing device according to Embodiment 3.

[0041] Figure 10 This is a perspective view showing the situation where a magnetized magnet is inserted into the insertion part of the rotor core using the magnet induction device of Embodiment 3.

[0042] Figure 11 This is a perspective view showing the state in which the magnetized magnet has been inserted into the insertion part of the rotor core using the magnet induction device of Embodiment 3. Detailed Implementation

[0043] Hereinafter, specific embodiments of which this disclosure is applied will be described in detail with reference to the accompanying drawings. However, this disclosure is not limited to the embodiments described below. Furthermore, for the sake of clarity, the following description and drawings have been appropriately simplified.

[0044] <Implementation Method 1>

[0045] First, the magnetized magnets and magnet arranging fixtures used in the magnet arranging method of this embodiment will be described. It should be noted that, in the following description, a three-dimensional (XYZ) coordinate system will be used for clarity.

[0046] Figure 1 This is a perspective view showing the arrangement of magnetized magnets to be newly arranged in the magnet arrangement fixture in the magnet arrangement method of this embodiment. Figure 2 This is a diagram showing the state of the magnetized magnets to be newly arranged in the magnet arrangement fixture, viewed from the Z-axis+ side, in the magnet arrangement method of this embodiment. Figure 3 It is an XY cross-sectional view showing the force relationship when magnetized magnets are arranged in a magnet arrangement fixture.

[0047] like Figures 1 to 3 As shown, the magnetized magnet 1 is, for example, a long quadrangular prism shape in the Z-axis direction, with the N pole portion and the S pole portion configured in such a way that a spiral magnetic flux loop R is formed in the Z-axis direction.

[0048] However, the magnet 1 is not limited to a square prism shape; it can also be cylindrical or other polygonal prism shapes. The shape of the magnet 1 is not limited. Incidentally, in... Figure 1 A portion of the magnetic flux loop R is shown in the figure.

[0049] The magnet arrangement fixture 2 is made of magnetic materials, such as... Figures 1 to 3 As shown, it includes a first clamp 21 and a second clamp 22. The first clamp 21 is, for example, a flat plate that is approximately parallel to the YZ plane. The X-axis side of the first clamp 21 is an arrangement surface for arranging the magnetized magnets 1, and functions as a guide surface for guiding the magnetized magnets 1 when arranging them.

[0050] A groove 21a extending in the Z-axis direction is formed on the X-axis side surface of the first clamp 21. For example... Figure 2 As shown, the slots 21a are arranged at intervals in the Y-axis direction, such that when the magnetized magnets 1 are arranged on the X-axis side of the first clamp 21, they are positioned at the boundary portions of adjacent magnetized magnets 1. Therefore, the width dimension in the Y-axis direction between adjacent slots 21a on the X-axis side of the first clamp 21 is shorter than the width dimension in the Y-axis direction of the magnetized magnets 1.

[0051] At this time, as Figure 3 As shown, the depth in the X-axis direction and the width in the Y-axis direction of the groove 21a are preferably such that the magnetic flux generated between adjacent magnetized magnets 1 is reduced, and the attraction force A of the magnetized magnet 1 on the X-axis side of the first clamp 21 is greater than the repulsive force Re (or attraction force) between adjacent magnetized magnets 1. Furthermore, the length in the Z-axis direction of the groove 21a is preferably longer than the length in the Z-axis direction of the magnetized magnet 1.

[0052] like Figure 1 As shown, the second clamp 22 is a flat plate that is substantially parallel to the XY plane and is positioned on the Z-axis side relative to the first clamp 21. Furthermore, the second clamp 22 protrudes from the Z-axis side end of the first clamp 21 toward the X-axis side. The Z-axis side surface of the second clamp 22 functions as a predefined surface for contact with the Z-axis side end of the arranged magnetized magnet 1 to determine the Z-axis side position of the magnetized magnet 1.

[0053] Next, the arrangement method of the magnetized magnets 1 in this embodiment will be described. Here, Figure 4 This diagram illustrates the magnetic flux loops between magnetized magnets when a newly arranged magnetized magnet is positioned towards the X-axis + side and close to an existing magnetized magnet. Incidentally, in... Figure 4 A portion of the magnetic flux loop R is also briefly shown in the diagram.

[0054] It should be noted that, in the following description, for clarity, the already arranged magnetized magnets are sometimes labeled with reference numeral 1a, and the newly arranged magnetized magnets are sometimes labeled with reference numeral 1b. Furthermore, the magnetic flux loop of the already arranged magnetized magnet 1a is sometimes labeled with reference numeral Ra, and the magnetic flux loop of the newly arranged magnetized magnet 1b is sometimes labeled with reference numeral Rb.

[0055] like Figure 4 As shown, when the magnetized magnets 1a are arranged on the X-axis side of the first clamp 21, when the magnetized magnets 1b to be newly arranged are close to the already arranged magnetized magnets 1a towards the X-axis side, the magnetic flux loop Ra of the magnetized magnets 1a and the magnetic flux loop Rb of the magnetized magnets 1b repel each other, making it difficult to arrange the magnetized magnets 1b to be newly arranged so that they are adjacent to the already arranged magnetized magnets 1a in the Y-axis direction.

[0056] On the other hand, regarding the characteristics of the magnetic flux circuit, when the magnetic flux circuit Rb of the magnet to be newly arranged magnet 1b overlaps with the magnetic flux circuit Ra of the already arranged magnet 1a, and the magnet to be newly arranged magnet 1b is brought close to the already arranged magnet 1a in the Z-axis direction, which is the axial direction of the magnetic flux circuit Rb of the magnet 1b, the magnet to be newly arranged magnet 1b can be pulled into the Z-axis direction by the magnetic flux circuit Ra of the already arranged magnet 1a and the magnetic flux circuit Rb of the magnet to be newly arranged magnet 1b, and the magnet to be newly arranged magnet 1b is arranged to be adjacent to the already arranged magnet 1a in the Y-axis direction.

[0057] Therefore, in this embodiment, as Figure 1 and Figure 2 As shown, firstly, the X-axis + side surface of the newly arranged magnetized magnet 1b is brought into contact with the X-axis - side surface of the first clamp 21 in the magnet arrangement clamp 2 and attracted to that surface.

[0058] Next, in this state, the magnetized magnet 1b to be newly arranged is brought close to the magnetized magnet 1a in a Z-axis direction that is the axis of the magnetic flux circuit Rb of the magnetized magnet 1b to be newly arranged, so that the magnetic flux circuit Rb of the magnetized magnet 1b to be newly arranged overlaps with the magnetic flux circuit Ra of the magnetized magnet 1a to be arranged.

[0059] At this time, as Figure 1 As shown, the space at the Z-axis+ side end of the magnet arranging clamp 2, and on the X-axis- side relative to the first clamp 21, functions as an insertion part 2a for inserting the newly arranged magnetized magnet 1b. Incidentally, in Figure 1 In the middle, the insertion part 2a is shown by a single-dot dashed line (imaginary line).

[0060] As a result, the magnetized magnet 1b can be pulled to the Z-axis side through the magnetic flux loop Ra of the already arranged magnetized magnet 1a and the magnetic flux loop Rb of the magnetized magnet 1b to be arranged, so that the magnetized magnet 1b to be arranged is adjacent to the already arranged magnetized magnet 1a in the Y-axis direction.

[0061] In this way, the magnetized magnet 1b to be newly arranged can be pulled into the Z-axis side in a manner adjacent to the magnetized magnet 1a through the magnetic flux loop Ra of the already arranged magnetized magnet 1a and the magnetic flux loop Rb of the magnetized magnet 1b to be newly arranged.

[0062] Furthermore, even though a groove 21a is formed on the X-axis side of the first clamp 21 in the magnet arrangement fixture 2, the groove 21a is formed such that the attraction force A of the magnetized magnet 1 on the X-axis side of the first clamp 21 is greater than the repulsive force Re (or attraction force) between adjacent magnetized magnets 1. Therefore, when the magnetized magnet 1b to be newly arranged comes into contact with the first clamp 21 and is attracted to the first clamp 21, the attraction force can overcome the repulsive force or attraction force between adjacent magnetized magnets 1, allowing the magnetized magnet 1b to be newly arranged to move with high precision toward the Z-axis side.

[0063] Furthermore, the X-axis side surface of the first clamp 21 can function as a guide surface to move the magnetized magnet 1. As a result, the magnetized magnets 1b to be rearranged can be arranged in a determined position with high precision.

[0064] At this time, the groove 21a in the groove 21a on the X-axis side of the first clamp 21 in the magnet arrangement fixture 2, which is adjacent to the already arranged magnetized magnet 1a in the Y-axis direction, is marked. The magnetized magnet 1b to be newly arranged is brought into contact with the X-axis side of the first clamp 21 and attracted to the surface. In this state, it is preferable to move the magnetized magnet 1b to be newly arranged toward the Z-axis side so that the Z-axis side end of the magnetized magnet 1b comes into contact with the second clamp 22.

[0065] Therefore, the magnetized magnets 1 can be arranged using the groove 21a as a marker. Furthermore, the groove 21a reduces the magnetic flux generated between adjacent magnetized magnets 1. In addition, the Z-axis + side surface of the second clamp 22 can function as a predetermined surface to accurately determine the position of the Z-axis - side end of the magnetized magnet 1. As a result, newly arranged magnetized magnets 1b can be precisely arranged in the defined positions.

[0066] It should be noted that the magnet arrangement clamp 2 of this embodiment includes a second clamp 22, but the second clamp 22 may be omitted. Furthermore, the first clamp 21 is not limited to a flat plate, but may also be cylindrical or the like. Moreover, the groove 21a of the magnet arrangement clamp 2 may also be omitted. Furthermore, the groove 21a of the magnet arrangement clamp 2 is not limited to being disposed on all boundary portions of adjacent magnetized magnets 1, but may also be formed on a portion of the boundary portions of the magnet arrangement clamp 2.

[0067] The magnet arrangement method of this embodiment is suitable for arranging magnetized magnets 1 into a Halbach array, but it can also be implemented when magnetized magnets 1 that form a spiral magnetic flux loop R in the Z-axis direction are arranged.

[0068] <Implementation Method 2>

[0069] In this embodiment, a method for manufacturing a rotor utilizing the principle of the magnet arrangement method described above will be explained. The rotor manufacturing method of this embodiment is suitable for manufacturing radially spaced rotors.

[0070] First, the configuration of the magnet arrangement device used in the rotor manufacturing method of this embodiment will be explained. Figure 5 This diagram illustrates the arrangement of magnetized magnets using the magnet arrangement device of this embodiment. Figure 6 This is a three-dimensional view of the arrangement of magnetized magnets as seen from the Z-axis + side. Figure 7 This is a diagram showing the state of contact between the magnetized magnet and the magnet arrangement fixture, viewed from the Y-axis side. Figure 8 This is a diagram showing the arranged magnets as viewed from the Y-axis side. Incidentally, in... Figures 6 to 8 In the image, a portion of the magnetized magnets is extracted and shown to clearly illustrate the new arrangement of the magnetized magnets.

[0071] like Figures 5 to 8 As shown, the magnet arranging device 3 includes a magnet arranging clamp 4, a partition plate 5, and a magnet insertion device 6. The magnet arranging clamp 4 is composed of a magnetic body, such as... Figure 6 As shown, it has a first clamp 41 and a second clamp 42.

[0072] The first clamp 41 has a basic cylindrical shape, and its central axis is configured to be approximately parallel to the Z-axis. The outer peripheral surface of the first clamp 41 serves as the arrangement surface for the magnetized magnets 1 and functions as a guide surface for guiding the magnetized magnets 1 during arrangement. A groove 41a extending along the Z-axis direction is formed on the outer peripheral surface of the first clamp 41.

[0073] The slots 41a are arranged at intervals along the circumference of the first clamp 41, positioned at the boundary portions of adjacent magnetized magnets 1 when the magnetized magnets 1 are arranged on the outer peripheral surface of the first clamp 41. Therefore, the width between adjacent slots 41a on the outer peripheral surface of the first clamp 41 is shorter than the width of the magnetized magnets 1. It should be noted that the slots 41a are not limited to being positioned at all boundary portions of adjacent magnetized magnets 1; they may also be formed on a portion of the boundary portions of the first clamp 41.

[0074] At this point, it is preferable that the radial depth and circumferential width of the groove 41a are such that the magnetic flux generated between adjacent magnetized magnets 1 is reduced, and the attraction force of the magnetized magnet 1 on the outer peripheral surface of the first clamp 41 is greater than the repulsive or attractive force between adjacent magnetized magnets 1. Furthermore, it is preferable that the length of the groove 41a in the Z-axis direction is longer than the length of the magnetized magnet 1 in the Z-axis direction.

[0075] like Figure 6As shown, the second clamp 42 is basically in the form of a ring and is configured to be approximately parallel to the XY plane. Furthermore, the second clamp 42 protrudes radially outward from the Z-axis side end of the first clamp 41. The Z-axis side surface of the second clamp 42 functions as a predefined surface for contact with the Z-axis side end of the arranged magnetized magnet 1 to determine the Z-axis side position of the magnetized magnet 1.

[0076] A groove 42a extending radially along the second clamp 42 is formed on the Z-axis+ side surface of the second clamp 42. The groove 42a is arranged radially on the extension line of the groove 41a of the first clamp 41 when viewed from the Z-axis direction.

[0077] At this time, as Figure 6 As shown, the groove 42a is, for example, located on the radially outer side of the second clamp 42. That is, the radially inner side of the groove 42a of the second clamp 42 does not reach the groove 41a of the first clamp 41. The circumferential width of the second clamp 42 in the groove 42a is approximately equal to the thickness of the partition plate 5 in order to hold the partition plate 5.

[0078] It is preferable that such a magnet arrangement fixture 4 can be rotated about the central axis of the first fixture 41 by a drive mechanism (not shown in the figure).

[0079] The partition plate 5 is disposed between adjacent magnetized magnets 1 to arrange the magnetized magnets 1 in a cylindrical shape. The partition plate 5 is a flat plate made of non-magnetic material and is fixed in a state of being inserted into the groove 42a of the second clamp 42.

[0080] The magnet insertion device 6 is configured to allow the held magnetized magnet 1 to move along the Z-axis. That is, as... Figure 5 As shown, the magnet insertion device 6 includes a holding part 61 for holding the magnetized magnet 1 and a drive mechanism 62 for moving the holding part 61 along the Z-axis direction.

[0081] Next, the process of manufacturing a rotor using the magnet arrangement device 3 configured as described above will be explained. First, with the magnetized magnet 1b to be newly arranged held in place by the holding part 61 of the magnet insertion device 6, the holding part 61 is moved toward the Z-axis side, as follows: Figure 6 and Figure 7 As shown, the magnetized magnet 1b is brought into contact with the outer peripheral surface of the first clamp 41 and adsorbed onto the outer peripheral surface.

[0082] At this time, as Figure 7 As shown, adhesive 10 is applied to the side of the magnetized magnet 1b to be newly arranged that is opposite to the side of the already arranged magnetized magnet 1a. Therefore, adhesive 10 is also applied to the side of the already arranged magnetized magnet 1a on the side where the new magnetized magnet is to be arranged.

[0083] Next, the holding part 61 of the magnet insertion device 6 is moved toward the Z-axis side such that the magnetic flux circuit of the newly arranged magnetized magnet 1b overlaps with the magnetic flux circuit of the already arranged magnetized magnet 1a. Figure 8 As shown, the magnetized magnet 1b to be newly arranged is moved along the axial direction of the magnetic flux loop of the magnetized magnet 1b so that the end of the magnetized magnet 1b on the Z-axis side contacts the surface on the Z-axis+ side of the second clamp 42.

[0084] At this time, similar to Embodiment 1, the magnetized magnet 1b to be newly arranged is pulled into the Z-axis side through the magnetic flux loop of the already arranged magnetized magnet 1a and the magnetic flux loop of the magnetized magnet 1b to be newly arranged. As a result, the magnetized magnet 1b to be newly arranged can be arranged in a manner adjacent to the already arranged magnetized magnet 1a.

[0085] Then, a partition plate 5 is placed on the radially outer portion of the first clamp 41 of the magnet arranging clamp 4 in the gap between the already arranged magnetized magnets 1a and the newly arranged magnetized magnets 1b. Thus, when viewed from the Z-axis direction, the magnetized magnets 1 can be arranged into the desired arc shape. Here, the thickness and shape (e.g., triangular shape) of the partition plate 5 can be designed according to the radius of the arranged magnetized magnets 1.

[0086] Furthermore, an adhesive 10 is applied to the side of the already arranged magnetized magnets 1a, so that when the magnetized magnets 1b to be newly arranged are arranged to be adjacent to the already arranged magnetized magnets 1a, the magnetized magnets 1b to be newly arranged can be joined to the already arranged magnetized magnets 1a.

[0087] If the process of arranging the magnetized magnets 1b to be newly arranged is repeatedly performed while rotating the magnet arranging fixture 4, the magnetized magnets 1 can be arranged into a cylindrical shape. Then, if the cylindrical magnetized magnets 1 are moved relative to the magnet arranging fixture 4 towards the Z-axis+ side and removed from the fixture 4, and fixed to a rotor core (not shown) to assemble a rotating shaft, a rotor can be formed. In this case, the rotor can be either an inner rotor or an outer rotor.

[0088] The magnet arrangement method, rotor manufacturing method, and magnet arrangement device 3 are the same as in embodiment 1. The magnet to be newly arranged magnet 1b can be pulled into the Z-axis side in an adjacent manner to the magnet 1a through the magnetic flux circuit of the already arranged magnetized magnet 1a and the magnetic flux circuit of the magnetized magnet 1b to be newly arranged.

[0089] Furthermore, even though a groove 41a is formed on the outer peripheral surface of the first clamp 41 in the magnet arrangement fixture 4, the groove 41a is configured such that the attraction force of the magnetized magnet 1 on the outer peripheral surface of the first clamp 41 is greater than the repulsive or attractive force between adjacent magnetized magnets 1. Therefore, when the magnetized magnet 1b to be newly arranged comes into contact with the first clamp 41 and is attracted to the first clamp 41, the attraction force can overcome the repulsive or attractive force between adjacent magnetized magnets 1, allowing the magnetized magnet 1b to be newly arranged to move with high precision toward the Z-axis.

[0090] Furthermore, the outer peripheral surface of the first clamp 41 can function as a guide surface to move the magnetized magnet 1b to be newly arranged. As a result, the magnetized magnet 1b to be newly arranged can be arranged in a determined position with high precision.

[0091] It should be noted that the magnet arranging device 3 in this embodiment is configured such that the magnet arranging clamp 4 rotates around the central axis of the first clamp 41, or it can be configured such that the magnet insertion device 6 rotates around the central axis of the first clamp 41. In short, any configuration in which at least one of them rotates around the central axis of the first clamp 41 is acceptable.

[0092] <Implementation Method 3>

[0093] In this embodiment, a magnet induction device utilizing the principle of the magnet arrangement method described above will be explained. First, the configuration of the magnet induction device of this embodiment will be explained. The magnet induction device of this embodiment is suitable for placing magnetized magnets on magnetic bodies such as rotor cores. Figure 9 This is a perspective view showing the magnet induction device of this embodiment.

[0094] like Figure 9 As shown, the magnet guiding device 7 includes a runner 71, a guide 72, an induction magnet 73, and a pressing part 74. The runner 71 is made of a non-magnetic material and includes an insertion part 71a and a track 71b.

[0095] The insertion portion 71a is cylindrical in shape, having a through portion 71c that extends through the insertion portion 71a in the Z-axis direction. The rails 71b extend in the Z-axis direction and are arranged at intervals in the X-axis direction. The Z-axis-side end of the rails 71b is fixed to a fixing portion 71d that protrudes from the insertion portion 71a toward the X-axis+ side.

[0096] The guide portion 72 is a magnetic body extending along the Z-axis direction, and is fixed to the X-axis side of the through portion 71c of the insertion portion 71a. At this time, it is preferable that the X-axis+ side surface of the guide portion 72 is configured to be approximately parallel to the YZ plane.

[0097] The induction magnet 73 is, for example, a roughly quadrangular prism shape that is longer in the Z-axis direction, and is disposed on both sides of the guide portion 72 in the Y-axis direction when viewed from the Z-axis direction. In other words, the induction magnet 73 is disposed on both sides of the guide portion 72 with respect to the guide portion 72 when viewed from the X-axis direction.

[0098] The induction magnet 73 is fixed to the Y-axis + side and the Y-axis - side of the through portion 71c of the insertion portion 71a. The axis of the magnetic flux loop of these induction magnets 73 is approximately parallel to the Z-axis. However, the induction magnet 73 is not limited to a quadrangular prism shape, and can also be cylindrical or other polygonal prism shapes; the shape of the induction magnet 73 is not limited.

[0099] The pressing part 74 includes a slider 74a and a retaining part 74b. The slider 74a is inserted through the track 71b in the Z-axis direction and can move along the track 71b. The retaining part 74b has a mechanism that protrudes from the X-axis side end of the slider 74a toward the Z-axis side and can retain the magnetized magnet 1 at the Z-axis side end of the retaining part 74b.

[0100] Next, the process of inserting a magnetized magnet into the insertion part of the rotor core using the magnet induction device of this embodiment will be described. Figure 10 This is a perspective view showing the situation where a magnetized magnet is inserted into the insertion part of the rotor core using the magnet induction device of this embodiment. Figure 11 This is a perspective view showing the state in which the magnetized magnet has been inserted into the insertion part of the rotor core using the magnet induction device of this embodiment.

[0101] First, the insertion portion 8a formed on the rotor core 8 is configured to overlap with the insertion portion 71a of the groove member 71 in the Z-axis direction. Then, as... Figure 10 As shown, the magnetized magnet 1 is held by the holding part 74b of the pressing part 74.

[0102] Next, the pressing part 74 is moved along the track 71b toward the Z-axis side, and the magnetized magnet 1 is inserted into the interior of the insertion part 71a. At this time, the magnetized magnet 1 is inserted into the interior of the insertion part 71a in such a way that the X-axis side surface of the magnetized magnet 1 is in approximately face contact with the X-axis+ side surface of the guide part 72.

[0103] Then, the surface of the magnetized magnet 1 on the X-axis side is kept in approximately face-to-face contact with the surface of the guide 72 on the X-axis side, and the magnetized magnet 1 is pressed in by the pressing part 74 until the magnetized magnet 1 is inserted into the insertion part 8a of the rotor core 8. After that, the holding of the magnetized magnet 1 by the holding part 74b of the pressing part 74 is released.

[0104] At this time, the magnetized magnet 1 is pressed in along the axial direction of its magnetic flux circuit, with the magnetic flux circuit of the magnetized magnet 1 overlapping with that of the induction magnet 73. Similarly to Embodiment 1, the magnetized magnet 1 is pulled into the Z-axis side by the magnetic flux circuits of the magnetized magnet 1 and the induction magnet 73, and induced to the insertion portion 8a of the rotor core 8. That is, the induction magnet 73 induces the magnetized magnet 1 through its magnetic force.

[0105] Thus, the magnet guiding device 7 of this embodiment can utilize the principle of Embodiment 1 to guide the magnetized magnet 1 towards the Z-axis side through the magnetic flux circuit of the magnetized magnet 1 and the magnetic flux circuit of the guiding magnet 73. Furthermore, the X-axis+ side surface of the guide portion 72 can function as a guiding surface to move the magnetized magnet 1. As a result, the magnetized magnet 1 can be guided to a easily determined position with high precision.

[0106] It should be noted that in this embodiment, when viewed from the Z-axis direction, the induction magnet 73 is disposed on both sides of the guide portion 72 in the Y-axis direction, but it is sufficient to have at least one induction magnet 73. However, when the induction magnet 73 is disposed on both sides of the guide portion 72, the position control of the magnetized magnet 1 in the Y-axis direction can be stabilized.

[0107] Furthermore, in this embodiment, the magnetized magnet 1 is inserted into the insertion part 8a of the rotor core 8 as an embedded magnet, but the same implementation can also be carried out when the magnetized magnet 1 is arranged on the inner or outer circumferential surface of the rotor core using the magnet induction device 7.

[0108] This disclosure is not limited to the above-described embodiments, and appropriate modifications may be made without departing from the spirit of the invention.

[0109] This application claims priority to Japanese Patent Application 2021-44583, filed on March 18, 2021, the entire contents of which are incorporated herein by reference.

[0110] Explanation of reference numerals in the attached figures

[0111] 1: Magnetized magnet; 1a: Already arranged magnetized magnet; 1b: Newly arranged magnetized magnet;

[0112] 2: Magnet arrangement fixture; 2a: Insertion part;

[0113] 21: First fixture; 21a: Groove;

[0114] 22: Second clamp;

[0115] 3: Magnet arrangement device;

[0116] 4: Magnet arrangement fixture;

[0117] 41: First fixture; 41a: Groove;

[0118] 42: Second clamp; 42a: Groove;

[0119] 5: Divider;

[0120] 6: Magnet insertion device; 61: Holding part; 62: Drive mechanism;

[0121] 10: Adhesive;

[0122] 7: Magnet-guided device;

[0123] 71: Groove part; 71a: Insertion part; 71b: Track; 71c: Through part; 71d: Fixing part;

[0124] 72: Guiding Department;

[0125] 73: Inducing magnet;

[0126] 74: Press-in part; 74a: Sliding part; 74b: Holding part;

[0127] 8: Rotor core; 8a: Insertion part;

[0128] A: Adsorption force;

[0129] R: Magnetic flux loop; Ra: Magnetic flux loop of the already arranged magnetized magnets; Rb: Magnetic flux loop of the newly arranged magnetized magnets;

[0130] Re: Repulsive force.

Claims

1. A method for arranging magnets, comprising arranging multiple magnetized magnets, wherein, The magnet arrangement method includes an arrangement process of arranging the plurality of magnetized magnets in a magnet arrangement fixture made of magnetic materials. In the arrangement process, with the magnet to be newly arranged in contact with and attracted to the magnet arrangement fixture, the magnet to be newly arranged is moved along the axial direction of its magnetic flux circuit to become adjacent to the already arranged magnet, in such a way that the magnetic flux circuit of the magnet to be newly arranged overlaps with the magnetic flux circuit of the magnet already arranged in the magnet arrangement fixture.

2. The magnet arrangement method according to claim 1, wherein, The magnet arrangement fixture has a groove formed therein. The magnets to be newly arranged are arranged such that the slot is positioned at the boundary of the adjacent magnets when the magnetized magnets are already arranged.

3. A method for manufacturing a rotor, comprising the magnet arrangement method as described in claim 1 or 2.

4. A magnet arranging fixture for arranging magnetized magnets, wherein, The magnet arrangement clamp includes a first clamp made of magnetic material. The magnetized magnets are arranged on the surface of the first clamp, and the surface of the first clamp has grooves that are disposed at the boundary portions of adjacent magnetized magnets when the magnetized magnets are arranged. The magnet arranging fixture has an insertion portion on one side of one end of the groove in the direction of extension, the insertion portion for inserting the magnetized magnet to arrange the magnetized magnet on the surface of the first fixture.

5. The magnet arrangement fixture according to claim 4, wherein, The magnet arrangement clamp includes a second clamp made of magnetic material. The second clamp is disposed relative to the first clamp on one side of the opposite end of the first clamp in the direction in which the groove extends. The second clamp protrudes from the surface of the first clamp on one side where the groove is formed, so as to allow the insertion direction side end of the magnetized magnet to contact.

6. A magnet induction device for inducing a magnetized magnet, wherein, The magnet-inducing device includes: Insertion section for inserting the magnetized magnet; A guide portion is provided at the insertion portion to guide the magnetized magnet; An induction magnet is provided in the insertion part to induce the magnetized magnet by magnetic force; as well as The pressing section presses the magnetized magnet in such a way that the magnetic flux circuit of the magnetized magnet overlaps with the magnetic flux circuit of the inducing magnet, pressing the magnetized magnet in along the axial direction of its magnetic flux circuit. The magnetized magnet is inserted into the insertion portion, which is provided with the guide portion and the inducing magnet.

7. The magnet-inducing device according to claim 6, wherein, The induction magnets are positioned on both sides of the guide portion when viewed in the direction in which the magnetized magnet is pressed in.

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