Stator magnet assembly method, stator manufacturing method, magnet guide jig, and magnet assembly jig unit

Abstract

To provide a stator magnet assembly method, a stator manufacturing method, a magnet guide jig, and a magnet assembly jig unit, which can accurately and efficiently assemble a magnet to a stator core.SOLUTION: A stator magnet assembly method for mounting a magnet on a magnet mounting inner peripheral face of a stator core includes an axial movement step in which a target magnet being the magnet arranged at a movement start position on one side of the stator core in the axial direction is moved along the axial direction toward a mounting position where the magnet is mounted on the magnet mounting inner peripheral face. The axial movement step includes an adhesive application step for applying adhesive which at least one guide roller holds to the target magnet by moving the target magnet in the axial direction while being brought into contact with at least one guide roller which is rotatably arranged on one side of the stator core.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a stator magnet assembling method, a stator manufacturing method, a magnet guide jig, and a magnet assembling jig unit. [Background technology]

[0002] Conventionally, magnetic gears that magnetically couple two rotors are known. For example, Patent Document 1 discloses a magnetic gear in which a stator extends circumferentially to surround a first rotor and a second rotor that are aligned in the axial direction. The stator includes a pair of pole piece mounting plates spaced apart in the axial direction and stator pole pieces formed of a soft magnetic material such as electromagnetic steel sheet. Pole piece housing grooves are formed in the pole piece mounting plates, and stator pole pieces are mounted in the pole piece housing grooves. The stator pole pieces, which are positioned radially outward of the pole piece mounting plates, can be mounted in the pole piece housing grooves by moving the stator pole pieces, which are positioned radially outward from the pole piece mounting plates, radially inward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-059177 Summary of the Invention [Problem to be solved by the invention]

[0004] It is conceivable that the stator may include magnets (permanent magnets) instead of stator pole pieces. The magnets are arranged on the inner circumferential surface of the stator core. During the manufacturing process of the stator, it is preferable that the magnets be accurately and efficiently assembled to the stator core.

[0005] An object of the present disclosure is to provide a stator magnet assembling method, a stator manufacturing method, a magnet guide jig, and a magnet assembling jig unit that can accurately and efficiently assemble magnets into a stator core. [Means for solving the problem]

[0006] A stator magnet assembling method according to at least one embodiment of the present disclosure includes: A stator magnet assembling method for mounting a magnet on the inner peripheral surface of a stator core, comprising the steps of: an axial movement step of moving the target magnet, which is the magnet arranged at a movement start position on one side of the stator core in the axial direction, along the axial direction toward a mounting position where the target magnet is mounted on the magnet mounting inner peripheral surface, The axial movement step includes: The method includes an adhesive application step in which the target magnet is brought into contact with at least one guide roller that is rotatably arranged on one side of the stator core and moved along the axial direction, thereby applying adhesive held by the at least one guide roller to the target magnet.

[0007] A method for manufacturing a stator according to at least one embodiment of the present disclosure includes: A stator manufacturing method in which the above-described stator magnet assembling method is repeated to mount a plurality of the magnets on the magnet mounting inner circumferential surface over the entire circumferential length of the stator core, The method further includes a Halbach arrangement step in which the four types of magnets constituting the Halbach array are arranged one by one as target magnets from the first side to the second side in the circumferential direction on the magnet mounting inner circumferential surface, so that the plurality of magnets are arranged in a Halbach array such that the magnetic flux is stronger inside than outside the stator core.

[0008] A magnet guide jig according to at least one embodiment of the present disclosure includes: A magnet guiding tool for guiding a target magnet arranged on one side of a stator core in the axial direction to a mounting position where the target magnet is mounted on the magnet mounting inner peripheral surface of the stator core, A support base; at least one guide roller rotatably disposed on the support base, the at least one guide roller holding adhesive; Equipped with The at least one guide roller is configured to apply the adhesive to the target magnet while the target magnet moves toward the mounting position while in contact with the at least one guide roller.

[0009] A magnet assembly jig unit according to at least one embodiment of the present disclosure includes: The above-mentioned magnet guide jig; a pushing jig for pushing the target magnet, which has risen from the magnet mounting inner circumferential surface, into the mounting position; A magnet assembly jig unit comprising: The pushing jig is a non-magnetic plate extending in a circumferential direction radially inward of the magnet mounting inner peripheral surface, the non-magnetic plate being made of a non-magnetic material and having a holding hole opened in the radial direction; a push pin that is inserted into and held in the holding hole and is made of the non-magnetic material. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide a stator magnet assembling method, a stator manufacturing method, a magnet guide jig, and a magnet assembling jig unit that can accurately and efficiently assemble magnets into a stator core. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram of a magnetic gear electric machine according to an embodiment; [Figure 2] FIG. 2 is a schematic diagram of a stator according to an embodiment. [Figure 3] FIG. 2 is a schematic plan view of a magnet assembly jig unit according to one embodiment. [Figure 4] 4 is a schematic cross-sectional view taken along the line AA in FIG. 3 (without the target magnet disposed therein). [Figure 5] 4 is a schematic cross-sectional view taken along the line BB in FIG. 3 (without the target magnet disposed). [Figure 6] 4 is a schematic cross-sectional view taken along the line AA in FIG. 3 (with target magnets arranged therein). [Figure 7] 4 is a schematic cross-sectional view taken along the line BB in FIG. 3 (with the target magnet disposed therein). [Figure 8] FIG. 2 is a schematic view of a guide roller according to an embodiment. [Figure 9] FIG. 1 is a schematic diagram of a pusher according to an embodiment. [Figure 10] FIG. 1 is a schematic diagram of a target magnet floating from an inner peripheral surface of a magnet mounting according to one embodiment. [Figure 11] 4 is a flowchart of a stator magnet assembling method according to one embodiment. [Figure 12] 1 is a flowchart of a stator manufacturing method according to an embodiment. [Figure 13] FIG. 1 is a schematic diagram of four types of magnets in a Halbach array according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprise," "include," or "have" one element are not exclusive expressions that exclude the presence of other elements. Note that the same components will be denoted by the same reference numerals and the description thereof will be omitted.

[0013] <Basic Configuration of Magnetic Gear Electric Machine 10> Referring to Fig. 1, a magnetic gear electric machine 10 having a stator 20 will be generally described. The magnetic gear electric machine 10 has a rotating shaft 18 connected to an external device 9. In Fig. 1, the rotating shaft 18 is depicted as a single solid shaft member for the sake of simplicity of illustration, but the present disclosure is not limited to this. The rotating shaft 18 may be realized by a plurality of shaft members, and the plurality of shaft members may include a cylindrical shaft member.

[0014] In the following description, the "axial direction" refers to the axial direction of the axis S of the rotating shaft 18, the "circumferential direction" refers to the circumferential direction based on the axis S, and the "radial direction" refers to the radial direction based on the axis S. The "radial inner side" refers to the side approaching the axis S, and the "radial outer side" refers to the side moving away from the axis S. The axis S is the center of the stator 20. In this example, the axial direction refers to the horizontal direction, and the radial direction is a concept that includes the up and down directions.

[0015] The magnetic gear electric machine 10 includes a housing 17 that rotatably supports a rotating shaft 18, and a stator 20 fixed to the housing 17. The stator 20 includes a stator core 24, a plurality of stator coils 27 arranged in the stator core 24, and a plurality of magnets (stator magnets) 5 arranged on a magnet mounting inner circumferential surface 29, which is the inner circumferential surface of the stator core 24. The stator coils 27 are electrically connected to the electric power grid 16.

[0016] The magnetic gear electric machine 10 further includes a pole piece rotor 30. The pole piece rotor 30 includes an annular body 35 extending along the axis S radially inward of the stator 20, and a pair of connecting members 31 connecting the annular body 35 to the rotating shaft 18. The annular body 35 includes a plurality of magnetic pole pieces 36 and a plurality of non-magnetic bodies (not shown) arranged alternately along the circumferential direction. Each connecting member 31 is fixed to the rotating shaft 18, and the pole piece rotor 30 is configured to rotate integrally with the rotating shaft 18.

[0017] The magnetic gear electric machine 10 further includes a magnet rotor 40 connected to the rotating shaft 18 between the pair of connecting members 31. The magnet rotor 40 includes a plurality of inner magnets 41 arranged in the circumferential direction radially inside the annular body 35, and a rotor core 42 that supports the inner magnets 41. The rotor core 42 is connected to the rotating shaft 18 via a bearing, and the magnet rotor 40 is configured to rotate relative to the rotating shaft 18.

[0018] The magnetic gear electric machine 10 according to one embodiment is a magnetic gear motor that receives power from a power grid 16 and drives an external device 9. Its operating principle is as follows: A rotating magnetic field is generated when current is applied to the stator coil 27, causing the magnet rotor 40 to rotate. The relative position of the annular body 35 to the multiple inner magnets 41 and multiple magnets 5 changes in the circumferential direction, and the magnetic flux between the magnet rotor 40 and the stator 20 is modulated by the multiple pole pieces 36, causing the pole piece rotor 30 to rotate. Torque is transmitted from the rotating shaft 18, which rotates together with the pole piece rotor 30, to the external device 9, thereby driving the external device 9.

[0019] The magnetic gear electric machine 10 according to another embodiment is a magnetic gear generator that receives power from an external device 9 and supplies electricity to a power grid 16. The operating principle is as follows: When the external device 9 drives the rotating shaft 18, the pole piece rotor 30 rotates together with the rotating shaft 18. The relative position of the annular body 35 to the multiple inner magnets 41 and the multiple magnets 5 changes in the circumferential direction, causing the magnet rotor 40 to rotate. Electromagnetic induction occurs as the pole piece rotor 30 and the magnet rotor 40 rotate, generating a current in the stator coil 27, which supplies electricity to the power grid 16.

[0020] 1 illustrates a structure in which the rotating shaft 18 rotates together with the pole piece rotor 30, but the present disclosure is not limited to this. For example, a structure in which the rotating shaft 18 rotates together with the magnet rotor 40 may be employed. In this case, the pole piece rotor 30 is connected to the rotating shaft 18 via a bearing.

[0021] <Basic configuration of stator 20> FIG. 2 is a schematic diagram of a stator 20 according to an embodiment of the present disclosure. The stator core 24 of the stator 20 is formed from a soft magnetic material. The stator core 24 includes a base 23 extending in the circumferential direction and a plurality of teeth 25 protruding radially inward from the base 23. The plurality of teeth 25 are spaced apart in the circumferential direction, and the plurality of stator coils 27 described above are disposed on the plurality of teeth 25. Each tooth 25 has a tip portion 252, and an intervening member 209, which is a component of the stator core 24, may be disposed in an opening formed between two adjacent tip portions 252. The intervening member 209, which may be formed from, for example, a resin material, is held by the two tip portions 252.

[0022] The stator 20 further includes a plurality of protrusions 6 that protrude radially inward beyond the plurality of teeth 25. The protrusions 6 illustrated in FIG. 2 include a protrusion 7 that protrudes radially inward from a tip 252 of the tooth 25, and a protrusion 8 that protrudes radially inward from an intervening member 209. The protrusion 7 is integrally formed from the same soft magnetic material as the tip 252, and the protrusion 8 is integrally formed from the same resin material as the intervening member 209. The protrusions 7 and 8 have the same shape. Note that the intervening member 209 is not an essential component of the stator 20, and the protrusion 6 does not necessarily include the protrusion 8. In this case, the plurality of protrusions 6 are formed only from the plurality of protrusions 7. In the following description, the protrusions 7 and 8 may be referred to as "protrusions 6" without distinguishing between them.

[0023] The stator 20 further includes a plurality of magnets 5 arranged alternately with the plurality of protrusions 6 in the circumferential direction. The plurality of magnets 5 are arranged radially inward of the plurality of teeth 25, and each magnet 5 is sandwiched between two of the plurality of protrusions 6 that are adjacent in the circumferential direction. A pair of circumferential end faces 56, which are both circumferential end faces of the magnet 5, respectively abut against the pair of protrusions 6. Furthermore, a radially outer end face 57 of the magnet 5 abuts against the magnet mounting inner circumferential surface 29 of the stator core 24. In this embodiment, an adhesive 12 (see FIG. 8 ) is interposed between the circumferential end faces 56 and the protrusions 6, and between the magnet 5 and the magnet mounting inner circumferential surface 29.

[0024] 2, the radial length of the protrusion 6 is equal to or greater than the radial length of each magnet 5, but the present disclosure is not limited to this. The radial length of the protrusion 6 may be equal to or less than half or one-fourth the radial length of the magnet 5. Also, multiple protrusions 6 do not have to be provided, in which case the circumferential end faces 56 of two circumferentially adjacent magnets 5 directly abut against each other.

[0025] The multiple magnets 5 are arranged in a Halbach array. In this example, the Halbach array strengthens the magnetic flux caused by the magnets 5 on the radially inner side of the multiple magnets 5 compared to the radially outer side. The Halbach array is realized by arranging a group of four magnets 5 magnetized in different directions in the circumferential direction. As an example, the four magnets 5 constituting this group of magnets are surrounded by a two-dot chain line J in FIG. 2. Each magnet 5 extending in the axial direction is composed of multiple permanent magnets (not shown) stacked in the axial direction. For ease of explanation in this specification, each magnet 5 extending in the axial direction is counted as one magnet.

[0026] The four magnets 5 (four types of magnets 5) that make up the magnet group include a first radial magnet 1 magnetized radially outward, a second radial magnet 2 magnetized radially inward, a first circumferential magnet 3 magnetized on a first circumferential side, and a second circumferential magnet 4 magnetized on a second side opposite the first side. The first circumferential magnet 3 is located on the first circumferential side of the first radial magnet 1, and the second circumferential magnet 4 is located on the second circumferential side of the first radial magnet 1. The second radial magnet 2 is located on the first side of the first circumferential magnet 3. The magnetization directions of these four magnets 5 are indicated by thick arrows on each magnet 5, and the end of each magnet 5 facing the direction of the arrow is the north pole.

[0027] <Outline of magnet 5 assembly> Fig. 3 is a schematic plan view of a magnet assembly jig unit 50 and a stator core 24 according to one embodiment of the present disclosure. Fig. 3 shows the lower half of the stator core 24, and only two of the multiple protrusions 6. The magnet assembly jig unit 50 is used when assembling the magnets 5. The magnet assembly jig unit 50 is a jig for attaching the multiple magnets 5 in order from a first side to a second side in the circumferential direction to the magnet mounting inner circumferential surface 29 of the stator core 24. The magnet assembly jig unit 50 includes a magnet guide jig 60.

[0028] The magnet 5 is assembled as follows: The assembly worker rotates the stator core 24 to the desired circumferential position (arrow R). This positions the holding space E formed between the pair of protrusions 6 at the desired position. The circumferential position of the stator core 24 may be adjusted using, for example, a light irradiation device 65 (details will be described later).

[0029] The assembly worker then places the magnet 5 at a movement start position on one side of the axial direction relative to the stator core 24, and uses the magnet guiding jig 60 to linearly move the magnet 5 toward the stator core 24. The magnet guiding jig 60 guides the magnet 5 while simultaneously applying adhesive 12 (see FIG. 8) to the magnet 5. The magnet 5 moves linearly to a mounting position where it is mounted on the magnet mounting inner circumferential surface 29. The mounting position is a position where a pair of circumferential end faces 56 of the magnet 5 are sandwiched between a pair of protrusions 6, and where the outer end face 57 (see FIG. 2) of the magnet 5 abuts against the magnet mounting inner circumferential surface 29 along the entire axial length of the magnet 5.

[0030] After completing its linear movement, the magnet 5 according to this embodiment displaces radially inward from a position spaced apart from the magnet mounting inner circumferential surface 29 to reach the mounted position. However, the present disclosure is not limited to this. The magnet 5 according to other embodiments may displace radially from a position spaced apart from the magnet mounting inner circumferential surface 29 to a position in contact with the magnet mounting inner circumferential surface 29 during its linear movement.

[0031] After mounting the magnet 5, the assembly worker further rotates the stator core 24 and mounts another magnet 5 on the magnet mounting inner circumferential surface 29 in the same manner as above. This mounts another magnet 5 immediately adjacent to the already mounted magnet 5 (see FIG. 10). The assembly worker then performs the task of arranging the multiple magnets 5 one by one in order from the first side to the second side along the entire circumferential length of the magnet mounting inner circumferential surface 29. As a result, the multiple magnets 5 are arranged in a Halbach array on the magnet mounting inner circumferential surface 29.

[0032] One possible method for arranging the multiple magnets 5 in a Halbach array is to arrange the multiple first radial magnets 1 at intervals along the entire circumferential length of the magnet mounting inner circumferential surface 29, and then sequentially arrange the multiple second radial magnets 2, the multiple first circumferential magnets 3, and the multiple second circumferential magnets 4 in a similar manner. In contrast, according to the magnet 5 arrangement method disclosed herein, the multiple magnets 5 are arranged one by one in a packed manner from the first side to the second side in the circumferential direction, which reduces the amount of rotation of the stator core 24 during assembly and enables the stator 20 to be manufactured efficiently. In addition, adhesive 12 is applied while each magnet 5 is linearly moved toward the stator core 24, further improving the assembly efficiency of the magnets 5.

[0033] In the following description, in order to distinguish between the magnet 5 that has already been attached to the magnet mounting inner surface 29 and the magnet 5 that will be attached to the magnet mounting inner surface 29, the latter may be referred to as the "target magnet 55."

[0034] <Magnet guide jig 60> A magnet guiding jig 60 according to one embodiment of the present disclosure will be described with reference to Figures 3 to 8. As shown in Figure 3, the magnet guiding jig 60 includes a support base 70 extending along the axial direction, and at least one guide roller 80 rotatably disposed on the support base 70. The guide roller 80 also holds adhesive 12 (see Figure 8). The guide roller 80 rotates while abutting against the end face of the target magnet 55 that moves linearly toward the mounting position, and the adhesive 12 is applied from the guide roller 80 to the end face of the target magnet 55. When the target magnet 55 reaches the mounting position, the adhesive 12 hardens and the magnet is firmly attached to the stator core 24.

[0035] 4 and 5, the support base 70 includes a bottom wall 73 and a first side wall 71 and a second side wall 72 that protrude upward from the bottom wall 73. The first side wall 71 and the second side wall 72 face each other in the horizontal direction. The target magnet 55, which moves linearly, passes through the space surrounded by the bottom wall 73, the first side wall 71, and the second side wall 72.

[0036] A bottom wall opening 103 is formed in the bottom wall portion 73. The bottom wall opening 103 is recessed downward. The bottom wall opening 103 is a plurality of holes arranged at intervals in the axial direction. A first opening 101 is formed in the first side wall portion 71, and a second opening 102 is formed in the second side wall portion 72. The first opening 101 and the second opening 102 are recessed in directions away from each other when viewed in the axial direction. In this example, the first opening 101 is a plurality of holes arranged at intervals in the axial direction, and the second opening 102 is similarly recessed.

[0037] The guide rollers 80 include a first guide roller 81 rotatably arranged in the first opening 101, a second guide roller 82 rotatably arranged in the second opening 102, and a third guide roller 83 rotatably arranged in the bottom wall opening 103. The first guide roller 81 and the second guide roller 82 each abut against a pair of circumferential end faces 56 of the target magnet 55. The third guide roller 83 abuts against an outer end face 57 (see FIG. 6) of the target magnet 55.

[0038] As shown in FIGS. 3 to 5 , in this example, multiple first guide rollers 81 are arranged at intervals in the axial direction. Each first guide roller 81 has a support shaft 98a movably attached to the first opening 101 via a first elastic member 91, and a roller portion 97a rotatably arranged on the support shaft 98a. When the first elastic member 91 is in its natural state, the support shaft 98a is arranged in an attitude inclined with respect to the vertical direction, and at least a portion of the roller portion 97a protrudes from the first opening 101. Although this is merely one example of the present disclosure, the movable configuration of the support shaft 98a is realized by slidably fitting an end of the support shaft 98a into a slit groove formed on the inner circumferential surface of the first opening 101. As the support shaft 98a moves, the roller portion 97 retracts into the first opening 101.

[0039] As shown in FIGS. 4 and 5, between two axially adjacent first guide rollers 81, when each first elastic member 91 is in its natural state, two support shafts 98a are inclined in opposite directions relative to the vertical direction. Specifically, one support shaft 98a is inclined toward a first direction (arrow H1 in FIG. 4) parallel to the horizontal direction as it moves upward, while the other support shaft 98a is inclined toward a second direction (arrow H2 in FIG. 5) opposite to the first direction as it moves upward. In this example, the first elastic member 91 is connected to the upper part of one support shaft 98a, and the first elastic member 91 is connected to the lower part of the other support shaft 98a. As a result, only the upper part of one roller portion 97a protrudes from the first opening 101, and only the lower part of the other roller portion 97a protrudes from the first opening 101.

[0040] 3, there are two first guide rollers 81, but there may be three or more first guide rollers 81. In this case, a relationship is established in which the inclinations of the support shafts 98a relative to the vertical direction are opposite between any two adjacent first guide rollers 81.

[0041] As shown in FIGS. 3 to 5, the second guide rollers 82 are arranged at intervals in the axial direction. The second guide rollers 82 and the first guide rollers 81 are arranged alternately in the axial direction. Each second guide roller 82 has a support shaft 98b movably attached to the second opening 102 via the second elastic member 92, and a roller portion 97b rotatably arranged on the support shaft 98b. When the second elastic member 92 is in its natural state, the support shaft 98b is arranged in an attitude inclined with respect to the vertical direction, and at least one of the roller portions 97b protrudes from the second opening 102.

[0042] 4 and 5, between any two axially adjacent second guide rollers 82, when each second elastic member 92 is in its natural state, the two support shafts 98b are inclined at opposite angles to the vertical. In this example, the second elastic member 92 is connected to the upper part of one support shaft 98b, and the second elastic member 92 is connected to the lower part of the other support shaft 98b. As a result, only the upper part of one roller portion 97b protrudes from the second opening 102, and only the lower part of the other roller portion 97b protrudes from the second opening 102.

[0043] 4 and 5, the shortest distance between the first guide roller 81 and the second guide roller 82 as viewed in the axial direction when the first elastic member 91 and the second elastic member 92 are in their natural state is illustrated as dimensions L1 and L2. Dimensions L1 and L2 are shorter than the circumferential length of the target magnet 55. This allows the roller portions 97a and 97b to reliably abut against the pair of circumferential end faces 56 of the target magnet 55, respectively.

[0044] As shown in FIG. 3, the third guide rollers 83 are spaced apart in the axial direction. In this example, one first guide roller 81 and one second guide roller 82 are disposed between two adjacent third guide rollers 83. As shown in FIGS. 4 and 5, each third guide roller 83 has a support shaft 98c movably attached to the bottom wall opening 103 via a third elastic member 93, and a roller portion 97c rotatably disposed on the support shaft 98c. When the third elastic member 93 is in its natural state, the support shaft 98c is disposed in an inclined position relative to the horizontal direction, and at least a portion of the roller portion 97c protrudes from the bottom wall opening 103.

[0045] Between two axially adjacent third guide rollers 83, when each third elastic member 93 is in its natural state, the two support shafts 98c are inclined in opposite directions relative to the horizontal direction. Specifically, one support shaft 98c is inclined upward as it moves toward a first direction parallel to the horizontal direction (see FIG. 4), while the other support shaft 98c is inclined upward as it moves toward a second direction opposite to the first direction (see FIG. 5). In this example, the third elastic member 93 is connected to one end of one support shaft 98c, and the third elastic member 93 is connected to the other end of the other support shaft 98c.

[0046] 3, there are two third guide rollers 83, but there may be three or more third guide rollers 83. In this case, the inclinations of the support shafts 98c relative to the horizontal direction are opposite between any two adjacent third guide rollers 83.

[0047] The first elastic member 91, the second elastic member 92, and the third elastic member 93 may be any elastically deformable member, but for example, coil springs are used.

[0048] As shown in Figures 6 and 7, the target magnet 55 moves linearly while contacting these guide rollers 80 in sequence, and is guided toward the mounting position. Because roller portions 97a, 97b, and 97c protrude from the first opening 101, the second opening 102, and the bottom wall opening 103 (see Figures 4 and 5), they can reliably contact the target magnet 55. The first guide roller 81, the second guide roller 82, and the third guide roller 83 use the driving force of the target magnet 55 moving toward the mounting position to elastically deform the first elastic member 91, the second elastic member 92, and the third elastic member 93, respectively. This causes the support shafts 98a and 98b to change their orientation to be parallel to the vertical direction, and the support shaft 98c to change their orientation to be parallel to the horizontal direction. The elastic force presses the guide roller 80 against the target magnet 55, allowing the guide roller 80 to reliably apply the adhesive 12 to the target magnet 55.

[0049] 8, the configuration of guide roller 80 holding adhesive 12 will be described. This configuration is common to first guide roller 81, second guide roller 82, and third guide roller 83. In the following description, support shafts 98a, 98b, and 98c may be collectively referred to as support shaft 98, and roller portions 97a, 97b, and 97c may be collectively referred to as roller portion 97.

[0050] The roller portion 97 has a cylindrical portion 95 that stores the adhesive 12, and the cylindrical portion 95 has a cylindrical wall 96 in which a plurality of holes 99 are formed. While the roller portion 97 is pushed aside by the target magnet 55 and rotates while abutting against the target magnet 55, the adhesive 12 inside the cylindrical portion 95 moves from the plurality of holes 99 to the target magnet 55.

[0051] For example, when first guide roller 81 (see FIG. 4) is pushed aside by target magnet 55, the area surrounded by two-dot chain line M in FIG. 8 is the area created by the retraction of roller portion 97. An amount of adhesive 12 equivalent to the volume of this area is applied to circumferential end face 56 of target magnet 55. The same applies to adhesive 12 applied by second guide roller 82 and third guide roller 83.

[0052] As described above, in this embodiment, while the target magnet 55 moves toward the mounting position while contacting at least one guide roller 80, at least one guide roller 80 applies adhesive 12 to the target magnet 55. According to the above configuration, the target magnet 55 moving toward the mounting position is guided by the guide rollers 80, so the target magnet 55 can be accurately moved to the mounting position. This allows the target magnet 55 to be accurately assembled to the stator core 24. Furthermore, because the guide rollers 80 apply adhesive 12 to the target magnet 55 while the target magnet 55 is moving, the assembly of the target magnet 55 to the stator core 24 can be made more efficient. As described above, the magnet 5 can be accurately and efficiently assembled to the stator core 24.

[0053] The guide rollers 80 may include only one of the first guide roller 81, the second guide roller 82, and the third guide roller 83. The number of guide rollers 80 may also be one. For example, if the stator 20 does not include multiple protrusions 6, two adjacent magnets 5 abut on the magnet mounting inner circumferential surface 29. Therefore, only the first guide roller 81 or the second guide roller 82 may be used to apply adhesive 12 to only one circumferential end face 56 of the target magnet 55. The multiple holes 99 in the cylindrical portion 95 may be closed to prevent the adhesive 12 from leaking before the first guide roller 81 is pushed aside by the target magnet 55. More specifically, an open / close member may be provided inside the hole 99. The open / close member closes the hole 99 when the first guide roller 81 and the target magnet 55 are not abutting, and opens the hole 99 when they are abutting. More specifically, a movable protrusion may be provided on the outer periphery of the first guide roller 81, and a link mechanism may be provided to connect the protrusion and the opening / closing member. When the target magnet 55 presses the protrusion, the pressing force received by the protrusion is transmitted to the opening / closing member via the link mechanism, causing the opening / closing member to open the hole 99. In any of these embodiments, the above-mentioned technical advantages can be obtained.

[0054] Furthermore, guide roller 80 in this example is configured to elastically deform first elastic member 91, second elastic member 92, and third elastic member 93 by utilizing the driving force of target magnet 55. With the above configuration, guide roller 80, to which elastic force is applied by these elastic members, presses against target magnet 55, so that guide roller 80 can reliably apply adhesive 12 to target magnet 55.

[0055] Furthermore, the guide roller 80 in this example includes a first guide roller 81 and a second guide roller 82 for pressing against the pair of circumferential end faces 56 of the target magnet 55. With the above configuration, the adhesive 12 can be reliably applied to each of the pair of circumferential end faces 56, and the target magnet 55 can be firmly fixed between the pair of protrusions 6.

[0056] Furthermore, multiple first guide rollers 81 and multiple second guide rollers 82 are arranged alternately in the axial direction. With the above configuration, the force generated between target magnet 55 and guide rollers 80 can be dispersed in the axial direction, and adhesive 12 can be evenly applied to a pair of circumferential end faces 56 of target magnet 55.

[0057] In this embodiment, the inclinations of the support shafts 98a relative to the vertical direction are opposite between any two axially adjacent first guide rollers 81, and the inclinations of the support shafts 98b relative to the vertical direction are opposite between any two axially adjacent second guide rollers 82. This allows the adhesive 12 to be applied evenly in the up-down direction to the circumferential end faces 56 between two adjacent first guide rollers 81, and similarly, the adhesive 12 can be applied evenly in the up-down direction to the circumferential end faces 56 between two adjacent second guide rollers 82.

[0058] Furthermore, guide roller 80 in this example includes third guide roller 83 for pressing against outer end surface 57 of target magnet 55. With the above configuration, adhesive 12 can be reliably applied to outer end surface 57 of target magnet 55, and target magnet 55 can be firmly fixed to magnet mounting inner circumferential surface 29.

[0059] In this embodiment, the inclination of the support shafts 98c relative to the horizontal direction is opposite between two axially adjacent third guide rollers 83. This allows adhesive 12 to be applied evenly in the horizontal direction to outer end surfaces 57 of target magnets 55 between the two adjacent third guide rollers 83.

[0060] Furthermore, in this example, target magnet 55 pushes aside guide roller 80, causing guide roller 80 to enter first opening 101, second opening 102, and bottom wall opening 103 formed in support base 70. This prevents guide roller 80 from blocking the path of target magnet 55, allowing target magnet 55 to move smoothly in a straight line toward the mounting position.

[0061] Furthermore, adhesive 12 is stored inside guide roller 80 in this example and is released from hole 99. With the above configuration, guide roller 80 can supply adhesive 12 to target magnet 55 from hole 99 while being pushed aside by target magnet 55. Since adhesive 12 can be supplied to target magnet 55 in an amount equal to the volume of the area created by guide roller 80 being retracted, a sufficient amount of adhesive 12 can be applied to target magnet 55.

[0062] Returning to FIG. 3 , the magnet guiding jig 60 further includes an adhesive removal member 88 disposed on the support base 70. The adhesive removal member 88 is disposed on the other axial side of at least one guide roller 80 and is configured to remove a portion of the adhesive 12 applied to a pair of circumferential end faces 56 of the linearly moving target magnet 55. The adhesive removal member 88 of this example is also configured to remove a portion of the adhesive 12 applied to the outer end face 57 of the target magnet 55. The adhesive removal member 88 of this example is a brush disposed on each of the bottom wall portion 73, the first side wall portion 71, and the second side wall portion 72. The adhesive removal member 88 may be any member capable of attracting the adhesive 12, and may be a cloth instead of a brush. The adhesive removal member 88 does not necessarily have to be disposed on the bottom wall portion 73.

[0063] According to the above configuration, the amount of adhesive 12 applied to the pair of circumferential end faces 56 of the target magnet 55 can be kept within a certain range. This makes it possible to prevent the adhesive 12 from accumulating on the end 6A (see FIG. 3) on one side of each protrusion 6 that defines the entrance to the retaining space E when the target magnet 55 moves between the pair of protrusions 6. This eliminates the need to remove the adhesive 12 from the protrusions 6 after linearly moving the target magnet 55, further improving the efficiency of assembling the magnet 5 to the stator core 24.

[0064] <Pressing jig 120> 9, the magnet assembly jig unit 50 further includes a push-in jig 120. When the target magnets 55 are sequentially mounted on the magnet mounting inner circumferential surface 29, a target magnet 55 that has reached the mounting position may lift up from the magnet mounting inner circumferential surface 29 due to the magnetic repulsion that occurs between the already mounted magnet 5 and the target magnet 55 being mounted. This phenomenon can occur when multiple target magnets 55 are sequentially arranged on the magnet mounting inner circumferential surface 29 in a packed manner so that the magnets 5 are arranged in a Halbach array on the magnet mounting inner circumferential surface 29.

[0065] The pressing jig 120 is configured to press the lifted target magnet 55 against the magnet mounting inner circumferential surface 29. If the adhesive 12 hardens while the target magnet 55 is pressed against it, the target magnet 55 will be firmly fixed to the stator core 24 and will not lift up. After the adhesive 12 hardens, the pressing jig 120 releases the pressure on the target magnet 55.

[0066] The pressing jig 120 includes a non-magnetic plate 125 and a pressing pin 128, both of which are made of a non-magnetic material. The non-magnetic plate 125 extends circumferentially radially inward of the magnet mounting inner peripheral surface 29. The non-magnetic plate 125 is held by a holding mechanism (not shown) and faces the magnet mounting inner peripheral surface 29 in the radial direction with a gap therebetween. The non-magnetic plate 125 is formed with a plurality of holding holes 122 that are spaced apart in the circumferential direction. The plurality of holding holes 122 may include holes aligned in a row along the axial direction (each of these holes also corresponds to a holding hole 122). Each holding hole 122 penetrates the non-magnetic plate 125 in the radial direction.

[0067] The push pin 128 is inserted into and held in one of the retaining holes 122. The push pin 128 is configured to be displaceable in the radial direction while held in the retaining hole 122. The push pin 128 may be a pin that fits into the retaining hole 122 in an intermediate fit state, or may be a screw that screws into the retaining hole 122 as a screw hole. Alternatively, a push pin 128 may be attached to each of the multiple retaining holes 122. In FIG. 9, a single push pin 128 is shown for the sake of simplicity.

[0068] As already explained, the multiple magnets 5 in the Halbach array include a first radial magnet 1, a first circumferential magnet 3, a second radial magnet 2, and a second circumferential magnet 4, which are arranged consecutively from the first side to the second side in the circumferential direction. In the process of sequentially mounting these four magnets 5 on the magnet mounting inner circumferential surface 29, a magnetic repulsive force generated between the already mounted magnets 5 and the target magnet 55 may urge the target magnet 55 radially inward.

[0069] As a more specific example, FIG. 10 illustrates a case in which a target magnet 55 serving as the second circumferential magnet 4 is placed on the magnet mounting inner surface 29 immediately adjacent to the first radial magnet 1. After the second circumferential magnet 4 contacts the magnet mounting inner surface 29, the magnetic repulsion between the first radial magnet 1 and the second circumferential magnet 4 may cause the second circumferential magnet 4 to lift off the magnet mounting inner surface 29. In this case, the assembler uses a push pin 128 positioned radially inward relative to the target magnet 55 to push the second circumferential magnet 4 into the magnet mounting inner surface 29. The target magnet 55 is held in the mounted position until the adhesive 12 hardens. After the adhesive 12 hardens, the assembler moves the push pin 128 radially inward, and the pushing jig 120 releases the pressure on the target magnet 55.

[0070] 10 shows an example in which the second circumferential magnet 4 floats up, but the present disclosure is not limited to this. Even if the first radial magnet 1, the second radial magnet 2, or the first circumferential magnet 3 floats up, the target magnet 55 can be pushed into the magnet mounting inner circumferential surface 29 by the same procedure as above.

[0071] According to the above configuration, an assembly worker can use the push-in pins 128 to push the raised target magnet 55 into the mounting position. This allows the four types of magnets constituting the Halbach array to be arranged one by one in order on the magnet mounting inner circumferential surface 29. Compared to arranging a specific type of magnet 5 (e.g., first radial magnets 1) circumferentially around the stator core 24 and then arranging other types of magnets 5 (e.g., second radial magnets 2) circumferentially around the stator core 24, the amount of rotation of the stator core 24 is reduced, making the assembly of the magnets 5 into the stator core 24 more efficient. Furthermore, the target magnet 55 can be pushed into the mounting position simply by moving the push-in pins 128 radially outward. This facilitates the pushing operation.

[0072] <How to assemble magnet 5> 3 and 11, a method for assembling one target magnet 55 to the stator core 24 will be described. The target magnet 55 may be any of the first radial magnet 1, second radial magnet 2, first circumferential magnet 3, or second circumferential magnet 4. In the following description, "step" may be abbreviated as "S."

[0073] First, a stator core positioning step (S1) is performed to adjust the relative position of the stator core 24 with respect to the target magnet 55 in the circumferential direction. In S1, a light irradiation device 65 is used. More specifically, the assembly worker rotates the stator core 24 while visually checking the relative positional relationship between the stator core 24 and the light irradiated from the light irradiation device 65 toward the stator core 24 (arrow R in FIG. 3). As a mere example, the assembly worker may rotate the stator core 24 so that the irradiated light passes through approximately the center of any pair of protrusions 6. This positions the stator core 24 at a predetermined relative position with respect to the irradiated light. By performing S1, the circumferential range (i.e., first circumferential range) of the holding space E formed between a pair of circumferentially adjacent protrusions 6 overlaps with the circumferential range (i.e., second circumferential range) of the target magnet 55 at the movement start position (see FIG. 3). The rotation of the stator core 24 is performed by a rotation support mechanism (not shown) that rotatably supports the stator core 24.

[0074] Next, an axial movement step (S3) is performed in which the target magnet 55, which is arranged at the movement start position, is moved axially toward the mounting position. The axial movement step (S3) includes an adhesive application step (S3A). In S3A, the assembly worker moves the target magnet 55 linearly along the axial direction while bringing the target magnet 55 into contact with at least one guide roller 80. This allows the target magnet 55 to move linearly toward the mounting position while being coated with adhesive 12 held by the guide rollers 80.

[0075] In this example, S3A, a plurality of first guide rollers 81 and a plurality of second guide rollers 82 apply adhesive 12 to a pair of circumferential end faces 56 of the target magnet 55, respectively, and a plurality of third guide rollers 83 apply adhesive 12 to the outer end face 57 of the target magnet 55.

[0076] Furthermore, the axial movement step (S3) includes an adhesive removal step (S3B). In S3B, the target magnet 55 is linearly moved while an adhesive removal member 88 is brought into contact with the pair of circumferential end faces 56, thereby removing a portion of the adhesive 12 from the pair of circumferential end faces 56. In this example, the adhesive removal member 88 also contacts the outer end face 57 of the target magnet 55, thereby removing a portion of the adhesive 12 applied to the outer end face 57. After S3B, the target magnet 55 enters the holding space E formed between the pair of protrusions 6 along the axial direction. The target magnet 55 moves linearly toward the other side in the axial direction while sliding against the pair of protrusions 6.

[0077] Next, if the target magnet 55 that has reached the mounting position lifts up from the magnet mounting inner circumferential surface 29, a pushing step (S5) is executed in which the lifted target magnet 55 is pushed back into the mounting position. The assembly worker uses a pushing pin 128 to push the lifted target magnet 55 back into the magnet mounting inner circumferential surface 29. Note that if the target magnet 55 does not lift up from the magnet mounting inner circumferential surface 29 after S3 is executed, S5 is skipped. After S5, the target magnet 55 is mounted on the magnet mounting inner circumferential surface 29, and this flowchart ends.

[0078] According to the configuration in which the stator core positioning step (S1) is performed, in the axial movement step (S3) performed after S1, the target magnet 55 can be accurately inserted into the retaining space E between the pair of protrusions 6. Therefore, the target magnet 55 can be accurately assembled to the stator core 24.

[0079] Furthermore, in the stator core positioning step (S1), the rotating stator core 24 is stopped at a predetermined circumferential position based on the relative positional relationship in the circumferential direction between the light of the light irradiation device 65 and the stator core 24. This makes it possible to align the positional relationship in the circumferential direction between the stator core 24 and the target magnet 55, thereby facilitating the stator core positioning step.

[0080] After the axial movement step (S3), a step of additionally filling the gap between the protrusion 6 and the circumferential end face 56 with adhesive 12 may be performed.

[0081] <Method for manufacturing the stator 20> 12 and 13, a method for manufacturing the stator 20 will be described. In this method, four types of magnets 5 (i.e., first radial magnet 1, second radial magnet 2, first circumferential magnet 3, and second circumferential magnet 4) that constitute the Halbach array are arranged one by one in order from the first side to the second side in the circumferential direction. As a more specific example, the first circumferential magnet 3, first radial magnet 1, second circumferential magnet 4, and second radial magnet 2 are arranged in order from the first side.

[0082] First, a Halbach arrangement step (S11) is performed in which the first circumferential magnet 3, the first radial magnet 1, the second circumferential magnet 4, and the second radial magnet 2 are arranged in order from the first side to the second side. S11 is performed by repeating S1 to S5 shown in Fig. 11 four times. As a result, the four types of magnets 5 are arranged so as to cover the magnet mounting inner circumferential surface 29 in a continuous manner (see Fig. 13).

[0083] It is then determined whether to continue S11 (S13). S11 is repeatedly executed until the attachment of the magnets 5 is complete (S13: NO). As a result, the four types of magnets 5 are spread all over the magnet attachment inner circumferential surface 29 along the entire circumferential length of the stator core 24. When the attachment of all magnets 5 is complete (S13: YES), the stator 20 is completed and this flowchart ends. Note that in S11, the magnet 5 that is initially attached to the magnet attachment inner circumferential surface 29 may be any of the four types of magnets 5.

[0084] <Summary> The contents of the above-described embodiments can be understood, for example, as follows.

[0085] 1) A stator magnet assembling method according to at least one embodiment of the present disclosure includes: A stator magnet assembling method for mounting a magnet (5) on a magnet mounting inner peripheral surface (29) of a stator core (24), comprising: an axial movement step (S3) of moving a target magnet (55), which is the magnet arranged at a movement start position on one side of the stator core in the axial direction, along the axial direction toward a mounting position where the target magnet (55) is mounted on the magnet mounting inner peripheral surface, The axial movement step includes: The method includes an adhesive application step (S3A) in which the target magnet is brought into contact with at least one guide roller (80) that is rotatably arranged on one side of the stator core and moved along the axial direction, thereby applying adhesive (12) held by the at least one guide roller to the target magnet.

[0086] According to the above configuration 1), the target magnet moving toward the mounting position is guided by the guide rollers, so the target magnet can be moved accurately to the mounting position. This allows the target magnet to be accurately assembled to the stator core. In addition, the guide rollers apply adhesive to the target magnet while it is moving, so the assembly of the target magnet to the stator core can be made more efficient. As described above, a stator magnet assembling method is realized that can accurately and efficiently assemble a magnet to a stator core.

[0087] 2) In some embodiments, the stator magnet assembling method described in 1) above, If the target magnet reaches the mounting position after the axial movement step and floats up from the magnet mounting inner surface, the method further includes a pushing step (S5) of pushing the floating target magnet back into the mounting position.

[0088] According to the configuration 2) above, even if the symmetric magnet lifts off the inner circumferential surface due to the magnetic repulsion generated between the target magnet and a magnet that has already been attached to the inner circumferential surface, the lifted magnet can be brought back into contact with the magnet mounting surface, thereby enabling the magnet to be properly assembled to the stator core.

[0089] 3) In some embodiments, the stator magnet assembling method described in 2) above, In the pushing step, a pushing pin (128) held by a non-magnetic plate (125) extending circumferentially radially inward from the magnet mounting inner surface is pressed against the target magnet, thereby pushing the target magnet to the mounting position.

[0090] According to the configuration of 3) above, the target magnet can be pushed into the mounting position simply by moving the push-in pin radially outward, thereby simplifying the pushing step.

[0091] 4) In some embodiments, the stator magnet assembling method according to 1) or 3) above, The stator core includes a plurality of protrusions (6) arranged at intervals in the circumferential direction on the inner peripheral surface of the magnet mounting portion, The stator magnet assembly method is as follows: a stator core positioning step (S1) of adjusting the relative position of the stator core with respect to the target magnet in the circumferential direction before the axial movement step, so that a first circumferential range of a holding space (E) formed between the pair of adjacent protrusions overlaps with a second circumferential range of the target magnet disposed at the movement start position. Further provided are:

[0092] According to the above configuration 4), the target magnet can be accurately inserted into the holding space between the pair of protrusions in the axial movement step, and therefore the target magnet can be accurately assembled to the stator core.

[0093] 5) In some embodiments, the stator magnet assembling method described in 4) above, In the stator core positioning step, the stator core is rotated so that the stator core is positioned at a predetermined relative position with respect to light irradiated from a light irradiation device (65) toward the stator core.

[0094] According to the configuration 5) above, in the stator core positioning step, if the stator core is stopped at a predetermined circumferential position based on the positional relationship between the light from the light irradiation device and the stator core in the circumferential direction, the positional relationship between the stator core and the target magnet in the circumferential direction can be aligned, thereby simplifying the stator core positioning step.

[0095] 6) In some embodiments, the stator magnet assembling method according to any one of 1) to 5) above, The stator core includes a plurality of protrusions (6) arranged at intervals in the circumferential direction on the inner peripheral surface of the magnet mounting portion, the mounting position is a position where the target magnet is held by a pair of adjacent protrusions, The target magnet includes a pair of circumferential end faces (56) that respectively abut against the pair of protrusions, In the adhesive application step, the adhesive is applied to each of the pair of circumferential end surfaces, In the axial movement step, at least a portion of the target magnet is inserted along the axial direction into a holding space (E) formed between the pair of adjacent protrusions.

[0096] According to the configuration of 6) above, the pair of protrusions can guide the target magnet while it is moving in the axial movement step. This allows the target magnet to be accurately assembled to the stator core. Furthermore, because adhesive is interposed between the circumferential end face and the protrusions, it is possible to prevent the target magnet from coming off the pair of protrusions.

[0097] 7) In some embodiments, the stator magnet assembling method described in 6) above, The axial movement step includes: The method further includes an adhesive removal step (S3B) of removing a portion of the adhesive applied to each of the pair of circumferential end faces by moving the target magnet while bringing each of the pair of circumferential end faces into contact with an adhesive removal member (88) arranged between the at least one guide roller and the stator core.

[0098] According to the configuration of 7) above, the amount of adhesive applied to the circumferential end surface of the target magnet can be kept within a certain range. This prevents adhesive from accumulating on the end of one side of each protrusion when the target magnet moves between a pair of protrusions. This eliminates the need to remove adhesive from the protrusions after the axial movement step, further improving the efficiency of assembling the magnet to the stator core.

[0099] 8) In some embodiments, the stator magnet assembling method according to any one of 1) to 7) above, Each of the at least one guide roller is supported on a support base (70) via elastic members (first elastic member 91, second elastic member 92, third elastic member 93) so as to be able to swing, In the axial movement step, the at least one guide roller is pushed aside using the momentum of the target magnet moving toward the mounting position.

[0100] According to the above configuration 8), at least one roller can be pressed against the target magnet, which allows the guide roller to reliably apply adhesive to the target magnet.

[0101] 9) A method for manufacturing a stator according to at least one embodiment of the present disclosure includes: A stator manufacturing method in which the stator magnet assembling method described in 2) above is repeated to mount a plurality of the magnets on the magnet mounting inner circumferential surface over the entire circumferential length of the stator core, The method includes a Halbach arrangement step (S11) in which the four types of magnets (first radial magnet 1, second radial magnet 2, first circumferential magnet 3, second circumferential magnet 4) constituting the Halbach array are arranged one by one as target magnets from the first side to the second side in the circumferential direction on the magnet mounting inner circumferential surface, so that the plurality of magnets are arranged in a Halbach arrangement such that the magnetic flux is stronger inside than outside the stator core.

[0102] According to the inventor's findings, when four types of magnets arranged in a Halbach array are arranged one by one in order as target magnets on the inner circumferential surface of the magnet mounting assembly, the target magnets float up due to the magnetic repulsion generated between the already-mounted magnets and the target magnets. In this regard, with the configuration of 9) above, the pushing step can be performed to push the floated target magnets into their mounting positions. This allows the four types of magnets to be arranged one by one in order, so that they are spread out over the inner circumferential surface of the magnet mounting assembly. This makes it possible to further improve the efficiency of assembling magnets into the stator core compared to arranging magnets of a specific type circumferentially around the stator core and then arranging magnets of other types circumferentially around the stator core.

[0103] 10) The magnet guide jig (60) according to at least one embodiment of the present disclosure includes: A magnet guiding jig (60) for guiding a target magnet (55) arranged on one axial side of a stator core (24) to a mounting position where the target magnet is mounted on a magnet mounting inner peripheral surface (29) of the stator core, A support base (70); At least one guide roller (80) rotatably disposed on the support base, the guide roller (80) holding adhesive (12); Equipped with The at least one guide roller is configured to apply the adhesive to the target magnet while the target magnet moves toward the mounting position while in contact with the at least one guide roller.

[0104] The configuration 10) above provides the same technical advantages as the configuration 1).

[0105] 11) In some embodiments, the magnet guide jig described in 10) above, Each of the at least one guide roller is supported by the support base so as to be swingable via an elastic member (a first elastic member 91, a second elastic member 92, a third elastic member 93), The at least one guide roller is configured to elastically deform the elastic member by utilizing the thrust of the target magnet moving toward the mounting position.

[0106] The configuration 11) above provides the same technical advantages as the configuration 8).

[0107] 12) In some embodiments, the magnet guide jig described in 11) above, The at least one guide roller includes a first guide roller (81) and a second guide roller (82) for pressing against a pair of circumferential end faces (56) that are both end faces of the target magnet in the circumferential direction of the stator core.

[0108] According to the configuration of 12) above, the first guide roller and the second guide roller can be pressed against a pair of circumferential end faces of the target magnet, respectively, thereby ensuring that adhesive is applied to each of the pair of circumferential end faces.

[0109] 13) In some embodiments, the magnet guide jig described in 12) above, The first guide rollers are arranged in plurality at intervals in the axial direction, The second guide roller is disposed between two of the first guide rollers adjacent to each other in the axial direction.

[0110] According to the above configuration 13), the force generated between the target magnet and the guide roller can be dispersed in the axial direction, and the adhesive can be applied evenly to the target magnet.

[0111] 14) In some embodiments, the magnet guide jig according to any one of 11) to 13) above, The at least one guide roller further includes a third guide roller (83) for pressing against an outer end surface (57) of the target magnet in the radial direction of the stator core.

[0112] According to the configuration of 14) above, the third guide roller can be pressed against the outer end face of the target magnet, thereby ensuring that adhesive is applied to the outer end face of the target magnet and firmly fixing the target magnet to the magnet mounting inner circumferential surface.

[0113] 15) In some embodiments, the magnet guide jig according to any one of 11) to 14) above, Each of the at least one roller comprises: a support shaft (98) movably attached via the elastic member to openings (first opening 101, second opening 102, bottom wall opening 103) formed in the support base; a roller portion (97) rotatably disposed on the support shaft; Including, At least a portion of the roller portion is configured to enter the opening as the support shaft moves.

[0114] According to the configuration of 15) above, the target magnet moving toward the mounting position pushes aside the guide roller, allowing at least a portion of the guide roller to enter the opening formed in the support base. This prevents the guide roller from blocking the path of the target magnet, allowing the target magnet to move smoothly toward the mounting position.

[0115] 16) In some embodiments, the magnet guide jig described in 15) above, The roller portion has a cylindrical portion (95) that stores the adhesive, The cylindrical portion has a cylindrical wall (96) having a plurality of holes (99) formed therein.

[0116] According to the configuration of 16) above, the guide roller can supply adhesive to the target magnet through the hole while being pushed aside by the target magnet. Since the guide roller can supply an amount of adhesive to the target magnet equivalent to the volume of the area created by the retraction, a sufficient amount of adhesive can be applied to the target magnet.

[0117] 17) In some embodiments, the magnet guide jig according to any one of 10) to 13) above, The magnet further includes an adhesive removal member (88) disposed on the support base and configured to remove a portion of the adhesive applied to each of the pair of circumferential end faces of the target magnet.

[0118] The configuration 17) above provides the same technical advantages as the configuration 7) above.

[0119] 18) The magnet assembly jig unit (50) according to at least one embodiment of the present disclosure includes: The magnet guide jig (60) described in 10) above, a pushing tool (120) for pushing the target magnet that floats from the magnet mounting inner circumferential surface into the mounting position; A magnet assembly jig unit (50) comprising: The pushing jig is a non-magnetic plate (125) extending circumferentially radially inward of the magnet mounting inner peripheral surface and made of a non-magnetic material, in which a retaining hole (122) opening in the radial direction is arranged; a push pin (128) inserted into and held in the holding hole and made of the non-magnetic material; Includes.

[0120] The configuration 18) above provides the same technical advantages as the configuration 3). [Explanation of symbols]

[0121] 1: First radial magnet 2: Second radial magnet 3: First circumferential magnet 4:Second circumferential magnet 5: Magnet 6,7,8: Protrusion 6A: End 9: External equipment 10: Magnetic gear electric machine 12: Adhesive 16: Power system 17: Housing 18: Rotation axis 20: Stator 23: Bass 24: Stator core 25: Teeth 27: Stator coil 29: Magnet attachment inner circumferential surface 30: Pole piece rotor 31: Connecting member 35: cyclic body 36 :Magnetic pole piece 40: Magnet rotor 41: Inner magnet 42: Rotor core 50: Magnet assembly jig unit 55: Target magnet 56: Circumferential end face 57: Outer end face 60:Magnetic guide jig 65:Light irradiation device 70: Support stand 71: First side wall portion 72: Second side wall portion 73: Bottom wall 80: Guide roller 81: First guide roller 82: Second guide roller 83: Third guide roller 88: Adhesive removal material 91: First elastic member (elastic member) 92: Second elastic member (elastic member) 93: Third elastic member (elastic member) 95: Cylindrical part 96: Cylinder wall 97, 97a, 97b, 97c: Roller part 98,98a,98b,98c: Support shaft 99: Hole 101: First opening (opening) 102: Second opening (opening) 103: Bottom wall opening (opening) 120: Pressing jig 122: Holding hole 125: Non-magnetic plate 128: Push-in pin 209:Intervening member 252:Tip E: Holding space S: Axis line

Claims

1. A stator magnet assembling method for mounting a magnet on the inner peripheral surface of a stator core, comprising the steps of: an axial movement step of moving the target magnet, which is the magnet arranged at a movement start position on one side of the stator core in the axial direction, along the axial direction toward a mounting position where the target magnet is mounted on the magnet mounting inner peripheral surface, The axial movement step includes: and an adhesive application step of applying adhesive held by at least one guide roller to the target magnet by moving the target magnet along the axial direction while contacting the target magnet with at least one guide roller rotatably disposed on the one side of the stator core. Stator magnet assembly method.

2. If the target magnet reaches the mounting position after the axial movement step and floats up from the magnet mounting inner circumferential surface, the method further includes a pushing step of pushing the floating target magnet back into the mounting position. The stator magnet assembling method according to claim 1 .

3. In the pushing step, a pushing pin held by a non-magnetic plate extending in the circumferential direction radially inward of the magnet mounting inner peripheral surface is pressed against the target magnet, thereby pushing the target magnet to the mounting position. The stator magnet assembling method according to claim 2 .

4. the stator core includes a plurality of protrusions arranged at intervals in the circumferential direction on the magnet mounting inner circumferential surface, The stator magnet assembly method is as follows: a stator core positioning step in which, before the axial movement step, a relative position of the stator core with respect to the target magnet is adjusted in the circumferential direction so that a first circumferential range of a holding space formed between the pair of adjacent protrusions overlaps a second circumferential range of the target magnet disposed at the movement start position. Further equipped 4. The stator magnet assembling method according to claim 1.

5. In the stator core positioning step, the stator core is rotated so that the stator core is positioned at a predetermined relative position with respect to light irradiated from a light irradiation device toward the stator core. The stator magnet assembling method according to claim 4.

6. the stator core includes a plurality of protrusions arranged at intervals in the circumferential direction on the magnet mounting inner circumferential surface, the mounting position is a position where the target magnet is held by a pair of adjacent protrusions, the target magnet includes a pair of circumferential end surfaces that respectively abut the pair of protrusions, In the adhesive application step, the adhesive is applied to each of the pair of circumferential end surfaces, In the axial movement step, at least a portion of the target magnet is inserted along the axial direction into a holding space formed between the pair of adjacent protrusions.

3. The stator magnet assembling method according to claim 1 or 2.

7. The axial movement step includes: The method further includes an adhesive removal step of removing a portion of the adhesive applied to each of the pair of circumferential end faces by moving the target magnet while bringing each of the pair of circumferential end faces into contact with an adhesive removal member disposed between the at least one guide roller and the stator core. The stator magnet assembling method according to claim 6.

8. Each of the at least one guide rollers is supported on a support base via an elastic member so as to be able to swing, In the axial movement step, the at least one guide roller is pushed aside using a thrust force of the target magnet moving toward the mounting position.

3. The stator magnet assembling method according to claim 1 or 2.

9. 3. A stator manufacturing method in which the magnets are mounted on the magnet mounting inner circumferential surface over the entire circumferential length of the stator core by repeating the stator magnet assembling method according to claim 2, a Halbach arrangement step of arranging the four types of magnets constituting the Halbach array one by one as target magnets on the magnet mounting inner circumferential surface from a first side to a second side in the circumferential direction, so that the plurality of magnets are arranged in a Halbach array such that magnetic flux is stronger inside than outside the stator core; Stator manufacturing method.

10. A magnet guiding tool for guiding a target magnet arranged on one side of a stator core in the axial direction to a mounting position where the target magnet is mounted on the magnet mounting inner peripheral surface of the stator core, A support base; at least one guide roller rotatably disposed on the support base, the at least one guide roller holding adhesive; Equipped with The at least one guide roller is configured to apply the adhesive to the target magnet while the target magnet moves toward the mounting position while in contact with the at least one guide roller. Magnetic guide fixture.

11. Each of the at least one guide roller is supported by the support base via an elastic member so as to be swingable, The at least one guide roller is configured to elastically deform the elastic member by utilizing the thrust of the target magnet moving toward the mounting position. The magnet guide jig according to claim 10.

12. The at least one guide roller includes a first guide roller and a second guide roller for pressing against a pair of circumferential end faces, which are both end faces of the target magnet in the circumferential direction of the stator core, respectively. The magnet guide jig according to claim 11.

13. The first guide rollers are arranged in plurality at intervals in the axial direction, The second guide roller is disposed between two of the first guide rollers adjacent to each other in the axial direction. The magnet guide jig according to claim 12.

14. The at least one guide roller further includes a third guide roller for pressing against an outer end surface of the target magnet in the radial direction of the stator core. The magnet guide jig according to any one of claims 11 to 13.

15. Each of the at least one roller comprises: a support shaft movably attached to an opening formed in the support base via the elastic member; a roller portion rotatably disposed on the support shaft; Including, At least a part of the roller portion is configured to enter the opening as the support shaft moves. The magnet guide jig according to claim 11 or 12.

16. the roller portion has a cylindrical portion that stores the adhesive, The cylindrical portion has a cylindrical wall in which a plurality of holes are formed. The magnet guide jig according to claim 15.

17. The magnet further includes an adhesive removal member disposed on the support base, the adhesive removal member being configured to remove a portion of the adhesive applied to each of the pair of circumferential end faces of the target magnet. The magnet guide jig according to any one of claims 10 to 13.

18. The magnet guide jig according to claim 10; a pushing jig for pushing the target magnet, which has risen from the magnet mounting inner circumferential surface, into the mounting position; A magnet assembly jig unit comprising: The pushing jig is a non-magnetic plate extending in a circumferential direction radially inward of the magnet mounting inner peripheral surface, the non-magnetic plate being made of a non-magnetic material and having a holding hole opened in the radial direction; a push pin that is inserted into and held in the holding hole and is made of the non-magnetic material. Magnet assembly jig unit.

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