Method for manufacturing motor

Abstract

To provide a method for manufacturing a rotor for a motor in which a magnetized magnet is assembled to a rotor carrier with high accuracy.SOLUTION: A set of magnet pairs 31, 33 adjacent to each other at an interval are stuck to an inner wall 7 of a rotor carrier 5, and a narrow gap δ is formed in a first round. Next, when each magnet pair 32 of a second round is attached to the gap δ of the rotor carrier 5, a magnet pair 3 of the second round is attached to the gap δ corresponding to the interval in a circumferential direction. Attractive forces 11, 12 act between a set of magnets 1, 2 to attract each other, and repulsive forces 13, 14, 15, 16 acting on both sides in the circumferential direction between another two sets of magnet pairs 31, 33 adjacent on both sides is balanced on both outsides of the set of magnet pairs 32. Therefore, it is possible to assemble the magnets 1, 2 at a predetermined position of the inner wall 7 of the rotor carrier 5 over the entire circumference with high accuracy with a relatively small gripping force and a small pressing and holding force while suppressing an accuracy inhibiting factor caused by an attractive force and a repulsive force of each magnet.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for manufacturing a motor including a rotor and a stator.

Background Art

[0002] A rotor that rotates relative to a stator of a motor tends to increase the number of permanent magnets disposed on a rotor carrier made of a high magnetic permeability material or increase the amount of magnetic flux generated by the permanent magnets as the output torque of the motor increases.

[0003] Conventionally, as a method for manufacturing a motor, an assembly magnetization method is known in which a magnet material is fixed to a rotor carrier and then the magnet material is magnetized by a magnetization coil to form a permanent magnet. However, it has been difficult to manufacture equipment having a structure for suppressing the magnetic force impact during magnetization in the method for manufacturing a motor using this assembly magnetization method.

[0004] On the other hand, as another method for manufacturing a motor, for example, Patent Document 1 discloses a method for manufacturing a motor in which an upper rotor body formed with M magnetized first permanent magnets and a lower rotor body formed with another M magnetized second permanent magnets are assembled, and then a rotor body is formed to form a rotor.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Generally, when manufacturing a motor, in the process of assembling magnetized single magnets circumferentially on the inner wall of a rotor carrier if it is an outer rotor, since it is easily affected by the attractive and repulsive forces of adjacent magnetized single magnets, there has been a problem that the accuracy of assembling the magnetized single magnets at the target positions deteriorates. Similarly, if it is an inner rotor, in the process of assembling magnetized single magnets circumferentially on the outer wall of a rotor carrier, since it is easily affected by the attractive and repulsive forces of adjacent magnetized single magnets, there has been a problem that the accuracy of assembling the magnetized single magnets at the target positions deteriorates.

[0007] The present invention has been made in view of the above problems, and an object thereof is to provide a method and an apparatus for manufacturing a motor that can assemble a magnet after magnetization to a rotor carrier with high precision.

Means for Solving the Problems

[0008] The method for manufacturing a motor according to the present invention includes a step of attaching magnets (1, 2, 3, 36) to the inner wall (7) of the rotor carrier (5) such that the longitudinal direction of the magnets is along the direction of the central axis (51) of the cylindrical rotor carrier, a step of forming a gap (δ) corresponding to the circumferential length of the magnets between adjacent magnets (31, 33) attached to the inner wall of the rotor carrier when attaching the magnets to the inner wall of the rotor carrier, and a step of inserting the magnet (32) into the gap and attaching the magnet to the inner wall of the rotor carrier.

[0009] The manufacturing apparatus for a motor according to the present invention employs a configuration including support means (10) for rotatably supporting a rotor carrier (5), gripping means (20) for gripping magnets (1, 2, 3, 36), adhesive supply means for applying an adhesive (23) to the outer surface of the magnets or the inner wall (7) of the cylindrical rotor carrier, pressure holding means (30) for sandwiching and pressure holding an adhesive between the inner wall of the rotor carrier and the magnets, and drive means (40) for rotationally driving the rotor carrier around the central axis (51) of the rotor carrier around the pressure holding means.

[0010] According to the method and apparatus for manufacturing a motor according to the present invention, after attaching magnets to the inner wall of the rotor carrier, another magnet is attached to the attached magnets with a circumferential interval, so that the magnets are not affected by the attractive force and repulsive force of the magnets adjacent to each other with a circumferential interval.

[0011] At this time, magnets adjacent to each other with an interval corresponding to the circumferential length of the magnet are attached to the inner wall of the rotor carrier in the first round, and in the first round, a narrow gap (δ) corresponding to the circumferential length of the magnet is formed between the magnets.

[0012] Next, the second-round magnets are attached to the gaps corresponding to the plurality of intervals formed in the circumferential direction of the inner wall of the rotor carrier.

[0013] In the second round, for example, as shown in the schematic diagram of FIG. 3, an attractive force (11, 12) acts between each pair of magnets (1, 2) to attract them, and on both outer sides of a pair of magnet pairs (32), repulsive forces (13, 14, 15, 16) acting on both circumferential sides between two other pairs of magnet pairs (31, 33) adjacent on both sides are in a balanced relationship.

[0014] Therefore, while suppressing the accuracy-inhibiting factors exerted by the attractive force and repulsive force of each magnet and reducing the gripping force for gripping the magnet pair and the pressure-holding force for pressure-holding the magnet pair, the magnets adjacent to each other with a predetermined gap are fixed to the inner wall of the rotor carrier with high precision. As a result, the magnetized magnets can be assembled to the predetermined positions on the inner wall of the rotor carrier with high precision.

Brief Description of the Drawings

[0015]

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Embodiments for Carrying Out the Invention

[0016] Hereinafter, a method for manufacturing a motor and a manufacturing apparatus for a motor according to an embodiment of the present invention will be described with reference to the drawings. In a plurality of embodiments, substantially the same constituent parts are denoted by the same reference numerals, and the description thereof will be omitted.

[0017] (First Embodiment) First, a method for manufacturing a motor according to an embodiment will be described.

[0018] As shown in FIG. 1, the manufacturing of a set of magnet pairs is performed by aligning the longitudinal side surfaces 1a and 1b of two long plate-shaped magnet materials 1 and 2 with each other, holding the magnet materials 1 and 2 under a constant pressure from the vertical and horizontal directions, and energizing a magnetization coil (not shown) disposed on the radially inner side of the magnet materials 1 and 2 to magnetize the magnet materials 1 and 2.

[0019] As shown in Fig. 1, a pair of magnets 3 is prepared by combining a long plate-shaped first magnet 1 and a long plate-shaped second magnet 2 by utilizing the attracting force between two magnets 1 and 2 (corresponding to magnet materials 1 and 2) after magnetization. In the pair of magnets 3, the side surface 1a in the longitudinal direction of magnet 1 and the side surface 2b in the longitudinal direction of magnet 2 are attached to each other by the attracting force. It should be noted that both magnets 1 and 2 shown in Fig. 1 are drawn in a slightly bent state for convenience. However, in the pair of magnets 3 in the above preparation stage, actually, magnet 1 and magnet 2 are attached such that the side surface 1a of magnet 1 and the side surface 2a of magnet 2 face each other and the cross-sectional shape becomes square.

[0020] As shown in Figs. 2 and 3, a rotor carrier 5, which is a material for a rotor used in the manufacture of a motor according to an embodiment, has a cylindrical side wall 6 with an opening 9. In the manufacturing process of the rotor, a long plate-shaped magnet 1 and magnet 2, which are composed of a pair of magnets 3 inserted from the opening 9, are attached to the inner wall 7 of the side wall 6 of the cylindrical rotor carrier 5. At this time, the pair of magnets 3 is attached to the inner wall 7 of the rotor carrier 5 such that the longitudinal directions of the long plate-shaped magnets 1 and 2 are along the central axis line 51 of the rotor carrier 5 in parallel.

[0021] Fig. 2 shows a state where a plurality of pairs of magnets 3 are attached to the inner wall 7 of the rotor carrier 5 with an interval of gap δ in the circumferential direction. Fig. 3 shows a plan view of a partial region viewed in the arrow III direction parallel to the axis center line 51 of the rotor carrier 5 shown in Fig. 2.

[0022] In the manufacturing process, initially, after attaching a pair of magnet pairs 3 to the inner wall 7 of the rotor carrier 5, another pair of magnet pairs 3 (33) is attached with a gap δ corresponding to the width direction distance of a pair of magnet pairs in the circumferential direction with respect to the pair of magnet pairs 3 (31). At this time, since the magnet pairs 3 are attached with a gap δ in the circumferential direction of the inner wall 7, the magnet pairs 3 can be attached to the entire circumference of the inner wall at intervals without the influence of attraction or repulsion between adjacent magnet pairs 3 (31) and another magnet pair 3 (33) affecting each other. FIG. 2 shows a state in which a plurality of gaps δ corresponding to a plurality of intervals over the entire circumference and a plurality of magnet pairs 3 are alternately arranged on the inner wall 7 of the rotor carrier 5, and the magnet pairs 3 are attached to the inner wall 7.

[0023] Next, in the stage of the manufacturing process from the state shown in FIG. 2 to the state shown in FIG. 4, as shown in FIG. 3, when inserting the magnet pair 32 (3) into the gap δ between the magnet pair 31 (3) composed of the long plate-shaped magnets 1 and 2 and the magnet pair 33 (3) composed of the long plate-shaped magnets 1 and 2, the attractive forces 11, 12 and repulsive forces 13, 14, 15, 16 indicated by the arrows act on each of the magnets 1, 2 of the magnet pair 32 and each of the magnets 1, 2 of the magnet pairs 31, 33 adjacent to the magnet pair 32. The directions and magnitudes of the attractive forces 11, 12, repulsive forces 13, 14, 15, 16 shown in FIG. 3 schematically show the directions and magnitudes of the attractive and repulsive forces at each position.

[0024] FIG. 3 shows the positional relationship of the magnet pairs 31, 32, 33 in the stage of pressing and holding the magnet pairs 3 against the inner wall 7 when inserting the magnet pair 32 into the gap δ between the magnet pair 31 and the magnet pair 33, which is the stage before attaching the magnet pair 32. As shown in FIG. 3, when trying to insert another pair of magnet pairs 32 into the space of the gap δ in a state where a pair of magnet pairs 31 and another pair of magnet pairs 33 are arranged with a gap δ therebetween, the repulsive force 13 by the first magnet pair 31 and the repulsive force 14 by the first magnet pair 31 and the magnet pair 32 adjacent in the circumferential direction repel each other, and also, the repulsive force 15 by the magnet pair 32 and the repulsive force 16 by the second magnet pair 33 repel each other, and both repulsive forces are in a balanced relationship.

[0025] Therefore, when the magnet pair 32 is inserted into the gap δ between the magnet pair 31 and the magnet pair 33 and the magnet pair 32 is attached to the inner wall 7 of the rotor carrier 5, the repulsive forces 13, 14 between the adjacent magnets of the magnet pairs 31 and 32 and the magnets 32 and 33 and the repulsive forces 15, 16 are in a balanced relationship.

[0026] Therefore, when assembling the magnet pair 3 to the rotor carrier 5, when gripping the magnet pair 3 and assembling the gripped magnet pair 3 to the inner wall 7 of the rotor carrier 5, the magnets 1 and 2 can be assembled to the predetermined position on the entire circumference of the inner wall 7 of the rotor carrier 5 with high precision with a relatively small gripping force and a small pressure holding force.

[0027] According to the method for manufacturing a motor according to the present embodiment, while suppressing the accuracy-inhibiting factors exerted by the attractive force and repulsive force of the magnetized magnet, the magnet pair 3 that has been magnetized can be assembled to the predetermined position on the entire circumference of the inner wall 7 of the rotor carrier 5 with high precision.

[0028] Next, a manufacturing apparatus for a motor according to an embodiment will be described. The manufacturing apparatus for a rotor used in a motor includes a support means 10 that rotatably supports the rotor carrier 5, a gripping means 20 that grips a magnet pair 3 formed by combining long plate-shaped magnets 1 and 2 that attract each other, an adhesive supply means (not shown) that applies an adhesive 23 to the outer surface of the magnet pair 3, a pressure holding means 30 that sandwiches an adhesive between the inner wall 7 of the rotor carrier 5 and the magnet pair 3 and presses and holds the magnet pair 3 against the inner wall 7, and a driving means 40 that rotationally drives the rotor carrier 5 around the central axis 51 of the rotor carrier 5 around the pressure holding means 30.

[0029] The gripping means 20 grips a set of magnet pairs 3, applies the adhesive 23 to one surface of the magnet pair 3, and then conveys the magnet pair 3 to which the adhesive 23 has been applied to the inner wall 7 of the rotor carrier 5. As a result, the set of magnet pairs 3 conveyed to the inner wall 7 of the rotor carrier 5 is pressure-held against the inner wall 7 of the rotor carrier 5 by the attractive force of the magnets 1 and 2.

[0030] The adhesive supply means applies the adhesive 23 to the outer surfaces of a set of magnet pairs 3, 31, 32, 33. The pressing part of the pressing and holding means 30 is provided at the center of the cylindrical rotor carrier 5. By repeatedly rotating and stopping the rotor carrier 5 around the axial center line 51 by the driving means 40 described later, the pressing part presses the magnet pair 3 against the inner wall 7 facing the stop position of the rotor carrier 5 to pressurize and spread the adhesive, and the magnet pair 3 is adhered to a predetermined position on the inner wall 7 with the adhesive sandwiched therebetween. One pressing part serves as equipment for attaching a plurality of sets of magnet pairs 3 to the inner wall 7 of the rotor carrier 5. As a result, a jig corresponding to the adhesive curing time becomes unnecessary.

[0031] Next, the operation of the motor manufacturing apparatus according to an embodiment will be described.

[0032] (1) Magnetization of two As shown in FIG. 1, for the production of a set of magnet pairs 3, the longitudinal side surfaces 1a and 1b of two long plate-shaped magnet materials 1 and 2 (magnets 1 and 2 in the subsequent process) are aligned with each other, the magnet materials 1 and 2 are held under a constant pressure from the vertical, horizontal, and lateral directions, and the magnet materials 1 and 2 are magnetized in two by energizing a magnetization coil (not shown) arranged on the inner diameter side of the magnet materials 1 and 2. Hereinafter, after magnetization of the magnet materials 1 and 2, they are referred to as magnets 1 and 2.

[0033] In the state shown in FIG. 1, after magnetization of the two magnets 1 and 2, the gripping means 20 presses the magnet 1 and the magnet 2 at their respective end faces in the vertical and horizontal directions, and by energizing a magnetization coil (not shown) located on the inner diameter side, the magnet 1 and the magnet 2 are magnetized so as to attract each other to form a set of magnet pairs 3.

[0034] (2) Magnetization inspection and positioning After completing the magnetization inspection of the magnet pair 3 after magnetization, the magnet pair 3 is positioned and the magnet pair 3 held by the gripping means 20 is transferred to proceed with the assembly.

[0035] At the time of transfer, as shown in FIG. 9, the magnet pair 3 is gripped and transferred by a chuck corresponding to the gripping means 20 in the vertical and horizontal directions shown in FIG. 1. The magnitude of the gripping force at this time is, for example, 2000 N. The magnet pair 3 maintains a friction gripping state even when receiving an assembly attracting force from the rotor carrier 5 and the magnets, etc.

[0036] (3) Application of Adhesive Apply adhesive to the outer circumferential surface of the magnet pair 3 after magnetization by means of an adhesive supply means (not shown), and convey the magnet pair 3 with the applied adhesive from the opening 9 of the rotor carrier 5 to a predetermined position on the inner wall 7 of the rotor carrier 5 by the gripping means 20.

[0037] (4) During Assembly and Insertion When attaching a set of magnet pairs 3 each consisting of a magnet 1 and a magnet 2 to the inner wall 7 of the side wall 6 of the rotor carrier 5 as shown in FIG. 10, guide the magnet pair 3 gripped by the gripping means 20 in the direction of arrow 18 parallel to the central axis 51 of the inner wall 7 of the rotor carrier 5 by the guide 19 and insert it. The extending directions of the pair of long plate-shaped magnets 1 and 2 coincide with the central axis 51 direction of the rotor carrier 5. At this time, an attractive force of, for example, 1490 N acts on the pair of magnet pairs 3 in the direction of arrow 25, but the gripping means 20 that grips against this attractive force maintains the positional accuracy of the magnet pair 3.

[0038] (5) Pressurization and Holding Next, during the insertion of the magnet pair 3, as shown in FIGS. 11 and 12, while maintaining the circumferential gap δ1 between the adjacent magnet pairs 31 and 33 at, for example, 0.4 ± 0.1 mm by the pressurization and holding means 30 while gripping the magnet pair 3 by the gripping means 20, pressurize the magnet pair 32 against the inner wall 7 via the guide 19 with a pressing force of, for example, 1150 N in the direction of arrow 21. The guide 19 receives a pressing force of, for example, 1150 N from the pressurization and holding means 30 on the equipment side located at the center in the radial direction of the rotor carrier 5. The pressurization by the magnet fixing jig 34 is maintained until the adhesive 23 is spread and cured. At this time, together with the attractive force of the magnet itself, for example, a maximum of 1490 N acts on the inner wall 7. After pressurization and holding, the attachment of a set of magnet pairs 3 is completed.

[0039] In the first round of carrying the magnet pair 3 into the inner wall 7 of the rotor carrier 5 from the opening 9 and pressurizing and holding it, a set of magnet pairs 3 and intervals are alternately repeated, and the intervals and magnet pairs 3 are alternately arranged on the entire circumference of the inner wall 7, and a plurality of sets of magnet pairs 3 are attached at intervals on the entire circumference of the inner wall.

[0040] In the second round of carrying the magnet pair 3 into the inner wall 7 of the rotor carrier 5 and pressing and holding it, as in the first round, as described above, two magnetized magnet pairs 3 are manufactured, an adhesive is applied by an adhesive supply means, the magnet pair 3 coated with the adhesive is conveyed to the inner wall 7 of the rotor carrier 5 by a gripping means 20, and a set of magnet pairs 3 are sequentially inserted into the gaps corresponding to the intervals between the magnet pair 3 attached in the first round and the magnet pair 3 adjacent to this magnet pair 3. Similar to the assembly in the first round described above, a set of magnet pairs 3 are pressed and held by a pressure holding means 30 toward a predetermined position on the inner wall 7, and the magnet pair 3 is attached to the gap δ of the inner wall 7. In this way, by attaching the magnet pair 3 to the entire circumference of the inner wall 7, the attachment of the magnet pair 3 to the rotor carrier 5 is completed.

[0041] As described above, when assembling the magnet pairs 3 of the first and second rounds on the inner wall 7 of the rotor carrier 5, the driving means 40 rotationally drives the support means 10, and the rotor carrier 5 supported by the support means 10 rotates around the central axis 51. By repeating the rotation and stop of the rotor carrier 5 at predetermined angles, the position of each magnet pair 3 to be carried in and the position of the inner wall where each magnet pair 3 is to be attached are adjusted and controlled to predetermined positions.

[0042] As described above, when carrying the magnet pair 3 into the inner wall 7 of the rotor carrier 5, various attractive and repulsive forces act between the magnet pair 3 and the magnets 1 and 2. At this time, when inserting the magnet pair 3 gripped by the gripping means 20 into a predetermined position on the inner wall 7 of the rotor carrier 5, by adopting the above-described method of magnetizing two magnets and assembling them, it is possible to assemble the magnets with high precision to the entire circumference of the inner wall 7 of the rotor carrier 5 with a relatively small gripping force and a relatively small pressure holding force.

[0043] As shown in (1)-(5) above, by performing the steps of magnetizing two magnets, magnetization inspection, positioning, adhesive application, assembly insertion, and pressure holding a plurality of times, for example, 10 sets in the first round and 10 sets in the second round, the magnet pair 3 is attached to the entire circumference of the inner wall 7 of the rotor carrier 5.

[0044] According to this embodiment, if there are two pairs of attracting magnets, the repulsive forces are balanced with the magnets on the left and right. Therefore, since the repulsive forces are balanced between one end and the other end in the circumferential direction of the magnet pair 3, the magnets 1 and 2 can be gripped with a relatively labor-saving and high output by jumping one set, and another magnet pair 3 can be accurately inserted into the narrow gap δ between the adjacent magnet pairs 3, 3.

[0045] According to this embodiment, after inserting the magnet pair 3 from the opening 9 of the rotor carrier 5 in the direction of the arrow 18 shown in FIG. 7, the magnet pair 3 is press-held at a predetermined position on the inner wall 7 of the rotor carrier 5 by the press-holding means 30. As shown in FIG. 5, by a common piece of equipment (mechanism), when the surrounding rotor carrier 5 rotates around the central axis 51, the rotor carrier 5 stops at a predetermined relative position, and an adhesive is applied to the inner wall 7 of the rotor carrier 5 or the outer surface of the magnet pair, pressed, spread, and press-held by the attractive force between the rotor carrier 5 and the magnet pair 3 itself, and cured after the curing time has elapsed.

[0046] According to this embodiment, after the pressurization by the press-holding means 30 is completed and the press-holding mechanism jig is released, the magnet pair 3 is attached to the inner wall 7 of the rotor carrier 5 by the self-attractive force of the magnet pair 3.

[0047] According to this embodiment, by making only one pressurizing part into dedicated equipment, the variation in jig accuracy is eliminated, and the magnets can be assembled to the rotor carrier 5 with high precision. Also, the jig for the adhesive curing time is no longer required, resulting in a significant cost reduction.

[0048] According to this embodiment, the magnets can be gripped by the gripping means 20 with high output, and another magnet pair 3 can be accurately inserted into the narrow gap δ between the adjacent magnet pairs 3, and the another magnet pair 3 can be press-held at the narrow gap δ at the predetermined position of the inner wall 7 with a small press-holding force.

[0049] (Comparison with the comparative form) There is a rotor manufacturing apparatus according to a comparative form, which has a large number of, for example, 12 pressurizing and holding mechanisms at the center of a rotor carrier. The rotor manufacturing apparatus according to this comparative form uses a jig having 12 pressurizing and holding mechanisms, and uses a jig that pressurizes and spreads an adhesive and pressurizes and holds it until the adhesive hardens after spreading. According to the rotor manufacturing apparatus according to the comparative form, since the assembling accuracy of the magnet to the rotor depends on the accuracy of the jig, variations in the assembling accuracy occur when using a plurality of pressurizing jigs within the same jig or when using a plurality of jigs during multiple-piece assembly. In addition, the number of jigs corresponding to the adhesive curing time is required, which is expensive.

[0050] On the other hand, according to the above-described embodiment, the adhesive is pressurized and spread by a pressurizing portion concentrated at one location, pressurized and held using the attractive force between the rotor carrier and the magnet, and a rotation driving means for rotationally driving the rotor carrier supported by the support means and a pressurizing and holding means concentrated at one location enable the assembly of the magnet with high-precision positional accuracy by a pressurizing and holding mechanism jig at one location.

[0051] The above embodiment has described the adhesive supply means for applying the adhesive to the outer surfaces of a pair of magnets. However, as another embodiment, an adhesive supply means for applying the adhesive to the inner wall of the rotor carrier may be provided.

[0052] The second embodiment of the present invention is shown in FIG. 13. FIG. 13(a) shows the above-described first embodiment, and FIG. 13(b) shows the second embodiment. In FIG. 13, the arrow indicates the direction of the magnetic flux lines of the magnet, and the solid line indicates the contour line of the single magnet. In the second embodiment, instead of the magnet pair 3 corresponding to the magnets 1 and 2 in the first embodiment, a single magnet 36 formed by integral molding is used. According to the manufacturing method of the second embodiment, one magnet 36 is attached to the inner wall of the rotor carrier, and intervals corresponding to the circumferential length of the attached magnet 36 are provided on both sides in the circumferential direction. In the first round, the magnet 36 and the intervals are arranged alternately, and after a plurality of magnets 36 are attached in the circumferential direction, the magnet 36 is attached to each of the intervals in the second round. Note that the start of the attachment of the magnet 36 in the second round is not prevented before the attachment of the plurality of magnets 36 in the first round is completed.

[0053] According to the second embodiment, since the circumferential length of one magnet 36 is long, the number of magnets attached to the entire circumference of the inner wall of the rotor carrier is reduced. Thereby, labor saving in the manufacturing process is achieved. In addition, the step of forming a magnet pair by combining two magnets can be omitted. In the present invention, instead of the step of combining the attracting magnets described in the first embodiment into a set of magnet pairs, a manufacturing method including a step of combining the repelling magnets into a set of magnet pairs may be used.

[0054] Although the embodiments applied to the outer rotor have been described in the present invention, the present invention can also be applied to the case where magnet pairs are attached to the outer wall of the inner rotor. As described above, the present invention is not limited to the above embodiments, and can be implemented in various forms without departing from the gist thereof.

[0055] The method for manufacturing a motor of the present invention includes a step of combining long plate-shaped magnets (1, 2) that attract each other as a set of magnet pairs (3), a step of attaching the set of magnet pairs to the inner wall (7) of a cylindrical rotor carrier (5) such that the longitudinal direction of the set of magnet pairs is along the central axis (51) direction of the rotor carrier, and when attaching the set of magnet pairs to the inner wall of the rotor carrier in the central axis direction of the rotor carrier, a step of forming a gap (δ) corresponding to the circumferential length (width equivalent) of the set of magnet pairs in the circumferential direction on the inner wall of the rotor carrier between adjacent sets of the magnet pairs (31, 33) attached to the inner wall of the rotor carrier, and a step of inserting the set of magnet pairs (32) into the gap such that the longitudinal direction of the magnet is along the central axis direction of the rotor carrier and attaching the set of magnet pairs to the inner wall of the rotor carrier.

[0056] The method for manufacturing a motor of the present invention can include a step of attaching magnet pairs to the inner wall of the rotor carrier such that a gap (δ) corresponding to the circumferential length of a set of magnet pairs and the attached set of magnet pairs are arranged alternately in the circumferential direction on the inner wall of the rotor carrier.

[0057] The method for manufacturing a motor of the present invention can include a step of inserting a set of magnet pairs into the gap corresponding to the circumferential length of the set of magnet pairs, pressing and holding them, and attaching magnet pairs to the entire circumference in the circumferential direction of the rotor carrier.

[0058] When attaching a plurality of sets of the magnet pairs in the circumferential direction to the inner wall of the rotor carrier, the manufacturing apparatus for a motor of the present invention attaches another set of magnet pairs at an interval equal to the circumferential length of a set of magnet pairs in the circumferential direction of the inner wall with respect to the attached set of magnet pairs.

[0059] The manufacturing apparatus for a motor of the present invention forms a state in which a space having the same length as the circumferential length of a single magnet pair and the attached set of magnet pairs are alternately repeated in the circumferential direction on the inner wall of the rotor carrier.

[0060] The manufacturing apparatus of the motor of the present invention, the pressure holding means is provided at one place in the central portion on the inner wall side of the rotor carrier, and every time a pair of magnet pairs gripped by the gripping means is inserted into the rotor carrier, the pair of magnet pairs is pressure-held to be attached to the inner wall of the rotor carrier via an adhesive.

Explanation of reference numerals

[0061] 1 Long plate-shaped first magnet, 2 Long plate-shaped second magnet, 3 Pair of magnet pairs (magnets), 5 Rotor carrier, 6 Side wall, 7 Inner wall, 10 Support means, 11, 12 Gravitational force, 13, 14, 15, 16 Repulsive force, 20 Gripping means, 23 Adhesive, 30 Pressure holding means, 31, 32, 33, 36 Magnets, 34 Magnet fixing jig, 40 Driving means, 51 Central axis.

Claims

1. A step of attaching the magnets (1, 2, 3, 36) to the inner wall (7) of the cylindrical rotor carrier (5) such that the longitudinal direction of the magnets is along the direction of the central axis (51) of the rotor carrier; A step of forming a gap (δ) corresponding to the circumferential length of the magnet between adjacent magnets (31, 33) attached to the inner wall of the rotor carrier when attaching the magnets to the inner wall of the rotor carrier; A method for manufacturing a motor, comprising a step of inserting the magnet (32) into the gap and attaching the magnet to the inner wall of the rotor carrier.

2. The method for manufacturing a motor according to claim 1, including a step of forming the magnet by laminating and magnetizing long plate-shaped magnet materials.

3. The method for manufacturing a motor according to claim 1, including a step of inserting the magnet into the gap corresponding to the circumferential length of the magnet, applying pressure and holding it, and attaching magnets to the entire circumference in the circumferential direction of the rotor carrier.

4. The method for manufacturing a motor according to claim 1, wherein the outer wall of the rotor carrier is used instead of the inner wall of the rotor carrier.

5. Support means (10) for rotatably supporting the rotor carrier (5); Gripping means (20) for gripping the magnets (1, 2, 3, 36); Adhesive supply means for applying an adhesive (23) to the outer surface of the magnet or the inner wall (7) of the cylindrical rotor carrier; Pressure holding means (30) for sandwiching and pressure holding an adhesive between the inner wall of the rotor carrier and the magnet; A manufacturing apparatus for a motor, comprising driving means (40) for rotationally driving the rotor carrier around the central axis (51) of the rotor carrier around the pressure holding means.

6. The manufacturing apparatus for a motor according to claim 5, wherein when attaching a plurality of magnets in the circumferential direction to the inner wall of the rotor carrier, other magnets are attached at intervals equal to the circumferential length of the magnet in the circumferential direction of the inner wall with respect to the attached magnets.

7. The manufacturing apparatus for a motor according to claim 5 or 6, wherein a state is formed in which a space having the same length as the circumferential length of one magnet and the attached magnets are alternately repeated in the circumferential direction on the inner wall of the rotor carrier.

8. The pressure holding means is provided at one location in the central portion on the inner wall side of the rotor carrier, and each time the magnet gripped by the gripping means is inserted into the rotor carrier, the magnet is pressure held to attach the magnet to the inner wall of the rotor carrier via an adhesive. The manufacturing apparatus for a motor according to claim 6.

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