Motor production device and motor production method

Abstract

The present invention provides a motor production device and a motor production method which can contribute to improvement in productivity in a motor core production process.　Provided is a motor production device for filling, with a resin, a resin filling part provided in each of a plurality of columnar cores in a state in which the plurality of cores are disposed along an axial direction, said motor production device comprising: a first filling mechanism that can be inserted in a through hole provided in a center part of the plurality of cores and that can fill, with a resin, a resin filling part of a first core among the plurality of cores; and a second filling mechanism that is arranged along the circumferential direction of the plurality of cores and that fills, with a resin, a resin filling part of a second core among the plurality of cores.

Description

Motor manufacturing device and motor manufacturing method

[0001] The present disclosure relates to a motor manufacturing apparatus and a motor manufacturing method.

[0002] A rotating electric machine is provided with a motor core (e.g., including a rotor core (rotor iron core) and a stator core (stator iron core). Hereinafter, the rotor core and stator core will be collectively referred to simply as the core). The core has a plurality of slots arranged in a circular ring shape at predetermined intervals, each of which has a permanent magnet attached to it. One known method for attaching the permanent magnet to the core is to insert the permanent magnet into the slot, then fill the surrounding area with resin and allow it to harden (see, for example, Japanese Patent No. 4855123).

[0003] Japanese Patent No. 4855123 describes that a resin raw material 36 molten in a resin reservoir pot 37 can be extruded by a plunger 40 and injected into the magnet insertion hole 13 via a resin flow path 38. The resin member 16 injected above and around the permanent magnet 15 in the magnet insertion hole 13 can then be heated and hardened by a heating means in a lower mold 34. As a result, the resin member 16 fills the area above and around the permanent magnet 15 in the magnet insertion hole 13, and the permanent magnet 15 and the reference laminate 14 are integrated to form a reference block core 17.

[0004] Incidentally, Japanese Patent No. 4,855,123 also describes stacking (rotating) a predetermined number of fabricated reference block cores 17 on an assembly board (not shown) while rotating (i.e., skewing) them around their axes by a fixed angle, and also so that the axes of the axial holes 12, the axial centers of the through holes 22, the positions of the grooves 23 formed in the axial holes 12 in a plan view, and in this embodiment, the axes of the magnet insertion holes 13 (permanent magnets 15) are substantially aligned. When stacking the cores in this skewed manner, the resin filling work for each core must be carried out separately to separate the cores.

[0005] However, if the resin filling process is performed separately for each of the multiple cores, the takt time for the process of filling the cores with resin increases, resulting in a decrease in productivity. Therefore, there is room for improvement in improving productivity in the motor core manufacturing process.

[0006] In view of the above-mentioned problems, an object of the present disclosure is to provide a motor manufacturing apparatus and a motor manufacturing method that can contribute to improving productivity in the motor core manufacturing process.

[0007] In order to achieve the above-mentioned object, a first aspect of the technology disclosed herein is a motor manufacturing apparatus that fills resin into a resin filling portion provided in each of a plurality of cylindrical cores arranged along an axial direction, the motor manufacturing apparatus comprising: a first filling mechanism that can be inserted into a through hole provided in the center of the plurality of cores and that can fill resin into the resin filling portion of a first core of the plurality of cores; and a second filling mechanism that is a filling mechanism arranged along the circumferential direction of the plurality of cores and that fills resin into the resin filling portion of a second core of the plurality of cores.

[0008] A second aspect of the disclosed technique is the motor manufacturing apparatus according to the first aspect, in which the pressing member that presses the resin in the second filling mechanism faces the resin filling portion of the second core in the axial direction.

[0009] A third aspect of the technology disclosed herein is a motor manufacturing apparatus according to the first aspect, in which the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and resin is filled into the first core through the intermediate mold member.

[0010] A fourth aspect of the technique of the present disclosure is the motor manufacturing apparatus according to the first aspect, in which the first filling mechanism and the second filling mechanism are arranged on the same side with respect to the plurality of cores.

[0011] A fifth aspect of the technology disclosed herein is a motor manufacturing apparatus according to the fourth aspect, in which a heating section capable of heating resin is provided on the side where the first filling mechanism and the second filling mechanism are provided.

[0012] A sixth aspect of the technique of the present disclosure is the motor manufacturing apparatus according to the first aspect, in which the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are capable of operating independently of each other.

[0013] A seventh aspect of the technology of the present disclosure is a motor manufacturing apparatus according to the first aspect, in which the second filling mechanism includes a pressing member that presses the resin and is annular along the circumferential direction, and an annular tablet formed from the resin and annular along the circumferential direction is pressed by the pressing member, thereby filling the resin into the resin filling section.

[0014] An eighth aspect of the technology disclosed herein is a motor manufacturing apparatus according to the first aspect, in which the second filling mechanism includes a plurality of pressing members arranged circumferentially and pressing the resin, and each of the plurality of pressing members presses each of a plurality of tablets made of resin, thereby filling the resin into the resin filling section.

[0015] A ninth aspect according to the technique of the present disclosure is the motor manufacturing apparatus according to the first aspect, in which the plurality of cores include cores with different shapes.

[0016] A tenth aspect of the technology of the present disclosure is a method for manufacturing a motor, which includes arranging a plurality of cylindrical cores along an axial direction, and filling resin through a first filling mechanism that can be inserted into an opening provided in the center of the plurality of cores and can fill resin into the resin filling portion of a first core of the plurality of cores, and a second filling mechanism that is a filling mechanism arranged along the circumferential direction of the plurality of cores and fills resin into the resin filling portion of a second core of the plurality of cores.

[0017] An eleventh aspect of the technology of the present disclosure is a method for manufacturing a motor according to the tenth aspect, in which a pressing member that presses the resin in the second filling mechanism faces the resin filling portion of the second core in the axial direction.

[0018] A twelfth aspect of the technology of the present disclosure is a method for manufacturing a motor according to the tenth aspect, in which the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and resin is filled into the first core through the intermediate mold member.

[0019] A thirteenth aspect of the technique of the present disclosure is a method for manufacturing a motor according to the tenth aspect, in which the first filling mechanism and the second filling mechanism are arranged on the same side relative to the multiple cores.

[0020] A fourteenth aspect of the technology of the present disclosure is a method for manufacturing a motor according to the thirteenth aspect, in which a heating section capable of heating resin is provided on the side where the first filling mechanism and the second filling mechanism are provided.

[0021] A fifteenth aspect of the technology of the present disclosure is a method for manufacturing a motor according to the tenth aspect, in which the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are capable of operating independently of each other.

[0022] A sixteenth aspect of the technology disclosed herein is a method for manufacturing a motor according to the tenth aspect, in which the second filling mechanism includes a pressing member that presses the resin and is annular along the circumferential direction, and an annular tablet formed from resin and annular along the circumferential direction is pressed by the pressing member, thereby filling the resin into the resin filling section.

[0023] A seventeenth aspect of the technology disclosed herein is a method for manufacturing a motor according to the tenth aspect, in which the second filling mechanism includes a plurality of pressing members arranged circumferentially and pressing the resin, and each of the plurality of pressing members presses each of a plurality of tablets made of resin, thereby filling the resin into the resin filling section.

[0024] An eighteenth aspect of the technique of the present disclosure is the method for manufacturing a motor according to the tenth aspect, in which the plurality of cores include cores of different shapes.

[0025] According to the present disclosure, a motor manufacturing apparatus and a motor manufacturing method are provided that can contribute to improving productivity in the motor core manufacturing process.

[0026] FIG. 1 is a schematic explanatory diagram showing an example of a motor manufacturing apparatus according to an embodiment. FIG. 2 is a schematic perspective view showing an example of a rotor core and a mold according to an embodiment. FIG. 3 is a schematic perspective view showing an example of a first filling mechanism and a second filling mechanism according to an embodiment. FIG. 4 is a flowchart showing an example of a manufacturing process carried out by the motor manufacturing apparatus according to an embodiment. FIG. 5 is a schematic explanatory diagram showing an example of an operation of the motor manufacturing apparatus according to an embodiment. FIG. 6 is a schematic explanatory diagram showing an example of a motor manufacturing apparatus according to an embodiment. FIG. 7 is a schematic perspective view showing an example of a first filling mechanism and a second filling mechanism according to an embodiment.

[0027] Hereinafter, each embodiment for carrying out the present disclosure will be described with reference to the drawings. Note that the scope necessary for the explanation to achieve the object of the present disclosure will be schematically shown below, and the scope necessary for explaining the relevant parts of the present disclosure will be mainly explained, and the parts for which explanation is omitted will be referred to as publicly known technologies. Furthermore, identical or corresponding components in the drawings will be given the same or similar reference numerals, and redundant explanations will be omitted. Furthermore, when a single drawing includes multiple identical or corresponding components, only some of them may be given reference numerals to make the drawing easier to understand.

[0028] <<First Embodiment>> <Configuration of Motor Manufacturing Apparatus> Hereinafter, the configuration of a motor manufacturing apparatus 10 according to an embodiment of the present disclosure will be described with reference to Figures 1 to 3. Figure 1 is a schematic explanatory diagram showing an example of the motor manufacturing apparatus 10 according to the present embodiment. Figure 2 is a schematic perspective view showing an example of a rotor core 2 and a mold 20 according to the present embodiment. Figure 3 is a schematic perspective view showing an example of a first filling mechanism 50 and a second filling mechanism 60 according to the present embodiment.

[0029] The motor manufacturing apparatus 10 according to this embodiment can be used to attach permanent magnets 3 to magnet insertion holes 4 formed in a rotor core 2 (e.g., an inner rotor-type rotor core). The attachment of the permanent magnets 3 may be achieved by resin molding. While the rotor core 2 is exemplified as a motor core in this embodiment, the present disclosure is not limited thereto. Specifically, the motor core manufacturing apparatus 1 can also be used to resin-mold the coil-wound portions of a stator core (a motor core), or to fill axial through-holes in an uncrimped laminated core with resin to secure the laminated core together. For ease of understanding, the following description may refer to the X direction in FIG. 1 as the right direction, the opposite direction as the left direction, the Y direction as the front direction, the opposite direction as the rear direction, the Z direction as the up direction, and the opposite direction as the down direction. In the following description, terms such as upper, lower, left, right, front, and rear have the same meaning as terms using directions.

[0030] As an example, as shown in Figures 1 and 2, a motor manufacturing apparatus 10 according to this embodiment is configured to include a mold 20, a heating unit 40, a first filling mechanism 50, and a second filling mechanism 60. The motor manufacturing apparatus 10 is capable of filling a plurality of rotor cores 2 with resin. In this specification, the term "motor" also includes a semi-finished product in which some parts are attached to a motor core (rotor core or stator core). The motor manufacturing apparatus 10 is an example of a "motor manufacturing apparatus" according to the technology disclosed herein.

[0031] A plurality of rotor cores 2 manufactured by motor manufacturing apparatus 10 according to this embodiment may be stacked and used in the same motor core, or may be used in separate motor cores.

[0032] 1 , the motor manufacturing apparatus 10 can fill resin into a core 2A (hereinafter simply referred to as upper core 2A) arranged on the upper side inside a mold 20 and a core 2B (hereinafter simply referred to as lower core 2B) arranged on the lower side inside the mold 20. In this way, the motor manufacturing apparatus 10 can perform molding by filling resin into the magnet insertion holes 4 with a plurality of rotor cores 2 arranged along the axial direction (here, the height direction) of the rotor core 2. In other words, the motor manufacturing apparatus 10 is capable of multi-stage molding in which resin is filled into a plurality of cores stacked along the axial direction of a cylindrical shape.

[0033] In the following description, when there is no need to particularly distinguish between the upper core 2A and the lower core 2B, they may be simply referred to as the rotor core 2. The upper core 2A is an example of a "first core" according to the technology of the present disclosure, and the lower core 2B is an example of a "second core" according to the technology of the present disclosure. The multiple rotor cores 2 are an example of a "multiple cores" according to the technology of the present disclosure.

[0034] Note that, here, an example is given in which the upper core 2A and the lower core 2B have the same shape (here, core height (i.e., axial length)), but this is merely one example. The upper core 2A and the lower core 2B may have different shapes (for example, core height). Furthermore, in addition to the difference in core height, there may also be differences in the arrangement, number, and / or core diameter of the magnet insertion holes 4.

[0035] The motor manufacturing apparatus 10 may include a base 11, a plurality of (for example, four) support columns 12 erected on the surface of the base 11, and a top plate 13 supported at the tip portions of the support columns 12. The top plate 13 may have an upper mold 21 of a mold 20 (described later) fixed to its lower surface, and may be able to be raised and lowered together with the support columns 12 and the upper mold 21 in the vertical direction using an actuator (not shown). The raising and lowering operation of the top plate 13 is mainly performed when the rotor core 2 is held in the mold 20 or when the rotor core 2 is removed from the mold 20 and carried out.

[0036] The mold 20 is a member for holding the rotor core 2. Specifically, the mold 20 is capable of holding two rotor cores 2 (here, an upper core 2A and a lower core 2B). The mold 20 may include an upper mold 21 that abuts against and supports the upper part of the upper core 2A, specifically its upper surface, and a lower mold 30 that supports the lower part of the lower core 2B, specifically its lower surface, via a lower mold gate member 22. In addition, an intermediate mold member 23 is provided between the upper core 2A and the lower core 2B. In other words, the upper core 2A and the lower core 2B are arranged with the intermediate mold member 23 sandwiched therebetween. The intermediate mold member 23 is an example of an "intermediate mold member" according to the technology of the present disclosure.

[0037] As described above, the upper die 21 may be movable in the vertical direction together with the top plate 13. When the rotor core 2 is placed on the lower die gate member 22, the upper die 21 descends and presses the upper surface of the upper core 2A with a predetermined pressing force, thereby holding the rotor core 2 sandwiched between the upper die 21 and the lower die 30. The shapes, materials, etc. of the surfaces of the upper die 21 and the lower die gate member 22 that come into contact with the rotor core 2 can be adjusted so that the filled resin does not leak out of the rotor core 2 when the resin is filled into the magnet insertion holes 4. Specifically, the contact surfaces can be adjusted so that they are sealed when the rotor core 2 is sandwiched between the upper die 21 and the lower die 30.

[0038] In this embodiment, as described above, a structure is adopted in which the upper mold 21 moves up and down together with the top plate 13, but other structures can be adopted as long as they allow the relative vertical positions of the upper mold 21 and the lower mold 30 to be changed. Specifically, for example, instead of moving the upper mold 21 up and down, a structure may be adopted in which the lower mold 30 moves up and down, or in which both the upper mold 21 and the lower mold 30 move up and down.

[0039] A resin filling path 29 may be provided inside the lower gate member 22 for supplying softened resin to the multiple magnet insertion holes 4 of the lower core 2B placed on the lower gate member 22. The path structure of the resin filling path 29 may be changed depending on the number and shape of the magnet insertion holes 4 of the rotor core 2 and the shape of the lower die 30 described below, but is preferably a structure that connects the magnet insertion holes 4 and the lower die 30 over the shortest distance. In addition, a through hole 28 is formed in the center of the lower gate member 22 along the thickness direction. The through hole 28 is provided at a position corresponding to the through hole 5 provided in the center of the rotor core 2. The magnet insertion holes 4 are an example of a "resin filling portion" according to the technology disclosed herein, and the through hole 5 is an example of a "through hole" according to the technology disclosed herein.

[0040] Because the rotor core 2, in which the magnet insertion holes 4 are filled with resin, can often be changed to a different shape, it is advisable to prepare a plurality of lower die gate members 22 having resin filling passages 24 with different structures in advance and use them by appropriately replacing them to match the rotor core 2 held in the mold 20. In addition, the lower die 30 may further include a lifter that can raise and lower the lower die gate member 22 in order to introduce tablets into the lower die 30, clean the resin filling passages 24, etc.

[0041] The intermediate mold member 23 includes an upper plate member 23A and a lower plate member 23B. The upper plate member 23A abuts against the underside of the upper core 2A. A resin filling path 24 is provided inside the upper plate member 23A to supply softened resin to the multiple magnet insertion holes 4 of the upper core 2A. Specifically, the resin filling path 24 includes runners 25 and gates 27. The runners 25 extend radially from the center of the intermediate mold member 23. A gate 27 is formed at the tip of the runner 25. The gate 27 is located in a position facing the magnet insertion hole 4 of the upper core 2A. In this manner, resin is filled into the upper core 2A via the intermediate mold member 23.

[0042] As shown in FIG. 2 , the rotor core 2 is formed by laminating multiple thin electromagnetic steel sheets. The rotor core has a cylindrical shape, and a through-hole 5 is provided in the center of the rotor core 2 (i.e., the region including the central axis of the cylindrical shape). When the rotor core 2 is assembled into a motor, a shaft constituting a rotating shaft is inserted into the through-hole 5. The rotor core 2 also has multiple (four in FIG. 2 ) magnet insertion holes 4 arranged circumferentially and extending along the axial direction of the rotor core 2 so as to surround the through-hole 5. The magnet insertion holes 4 can be configured in a shape that allows insertion of permanent magnets 3 (see FIG. 1 ), such as a rectangular or arc-shaped through-hole that penetrates the rotor core 2 in the thickness direction, but the specific shape is not particularly limited. Similarly, the number of magnet insertion holes 4 can be arbitrarily changed and can be more than the four shown in FIG. 2 , for example, approximately 10 to 40.

[0043] The permanent magnets 3 are inserted and fixed into the magnet insertion holes 4 of the rotor core 2. The permanent magnets 3 may be formed, for example, as rectangular parallelepiped or arc-shaped blocks slightly smaller than the magnet insertion holes 4. The permanent magnets 3 may be magnetized or not when inserted into the magnet insertion holes 4. Furthermore, the permanent magnets 3 may be divided in the stacking direction or in a direction perpendicular to the stacking direction. When the permanent magnets 3 are inserted into the magnet insertion holes 4, at least partial gaps are formed between the outer circumferential surface of the permanent magnets 3 and the inner circumferential surface of the magnet insertion holes 4. The gaps formed in the magnet insertion holes 4 function as spaces into which resin is filled. When the upper core 2A is placed on the intermediate mold member 23, these multiple spaces communicate with the gates 27 of the resin filling passage 24. When the lower core 2B is placed on the lower mold gate member 22, these multiple spaces communicate with the resin filling passage 29.

[0044] In this embodiment, the magnet insertion holes 4 of the rotor core 2 are exemplified as being rectangular parallelepiped-shaped holes that are open in the vertical direction and have substantially no gaps in the front-rear or left-right directions. Therefore, the upper mold 21, lower mold gate member 22, and intermediate mold member 23 have generally flat contact surfaces, but the shapes of the contact surfaces of the upper mold 21, lower mold gate member 22, and intermediate mold member 23 can be changed as appropriate to match the shape of the rotor core 2 to be held. For example, when the motor manufacturing apparatus 10 according to this embodiment is used for resin molding of an inner rotor type stator core, it is preferable to use the upper mold 21, lower mold gate member 22, and intermediate mold member 23 that include protrusions that are inserted into spaces formed in the center of the stator core.

[0045] The lower die 30 forms a space into which the resin tablet to be filled in the magnet insertion hole 4 can be poured. In other words, the lower die 30 is composed of a cylindrical space extending in the vertical direction, which is formed inside an outer peripheral wall 31 provided on the base 11. The metal mold 20 and the rotor core 2 are placed above the lower die 30. Note that, in this embodiment, the shape of the lower die 30 is exemplified as one formed as a space that is annular in plan view, but this can be changed as appropriate to suit the shape of the resin to be poured, etc.

[0046] 1 to 3, a first filling mechanism 50 and a second filling mechanism 60 are housed inside the lower mold 30. In other words, the first filling mechanism 50 and the second filling mechanism 60 are arranged on the same side (here, the lower side) of the rotor core 2 in the motor manufacturing apparatus 10. The first filling mechanism 50 is an example of a "first filling mechanism" according to the technology of the present disclosure, and the second filling mechanism 60 is an example of a "second filling mechanism" according to the technology of the present disclosure.

[0047] The first filling mechanism 50 is capable of filling the magnet insertion holes 4 of the upper core 2A with resin. The first filling mechanism 50 is also capable of being inserted into the through holes 5 of the rotor core 2. Specifically, the first filling mechanism 50 is provided inside the inner circumferential wall 32 within the lower mold 30. The first filling mechanism 50 is also capable of being inserted into the through holes 5 provided in the center of the lower core 2B. The first filling mechanism 50 is configured to include, for example, a cylindrical pressing member 52 and a rod member 54 that moves the pressing member 52 up and down (see also FIG. 3 ).

[0048] The pressing member 52 presses the cylindrical tablet CT toward the intermediate mold member 23. The cylindrical tablet CT is formed by molding resin into a cylindrical shape. The resin mainly contains a thermosetting resin material. Specifically, the resin may contain a thermosetting resin material such as epoxy resin, phenol resin, unsaturated polyester resin, or cyanate resin. In addition to the thermosetting resin material, a curing agent, a filler, etc. may be added to the resin.

[0049] The detailed dimensions of the cylindrical tablet CT are adjusted according to the shapes of the lower mold 30 and the resin filling passage 24, the capacity of the magnet insertion hole 4, etc. Although one cylindrical tablet CT is given as an example here, the tablet may have a shape other than cylindrical, or multiple tablets may be used, as long as the amount of resin filling can be ensured.

[0050] The pressing member 52 is inserted into a cylindrical cylinder member 56. A cylindrical tablet CT is also disposed inside the cylinder member 56. The cylinder member 56 is inserted into a through-hole 5 provided in the center of the lower core 2B. A spring member 58 is provided at the bottom of the cylinder member 56, and the spring force of the spring member 58 presses the cylinder member 56 against the intermediate mold member 23. This configuration ensures airtightness between the intermediate mold member 23 and the cylinder member 56, making it less likely for resin to leak when the resin is filled by the first filling mechanism 50.

[0051] Furthermore, sealing members (preferably resin sealing members) can be provided on the inner and outer peripheries of the tip of the pressing member 52 to provide a configuration that provides even greater protection against resin leakage.

[0052] Although the embodiment described above uses the biasing force of the spring member 58 to ensure airtightness between the intermediate mold member 23 and the cylinder member 56, this is merely one example. Any configuration can be used as long as it ensures airtightness that can prevent resin leakage. For example, a resin sealing member may be disposed between the cylinder member 56 and the intermediate mold member 23.

[0053] The rod member 54 is movable in the vertical direction by receiving power from a drive mechanism 70 (e.g., an actuator). When the rod member 54 moves upward, the pressing member 52 also moves upward in conjunction with the rod member 54.

[0054] The second filling mechanism 60 fills the magnet insertion holes 4 of the lower core 2B with resin. The second filling mechanism 60 is arranged along the circumferential direction of the rotor core 2. Specifically, the second filling mechanism 60 is arranged inside the lower mold 30 on the outer circumferential side of the first filling mechanism 50. The second filling mechanism 60 is configured to include an annular pressing member 62 and a rod member 64 that moves the pressing member 62 up and down. The pressing member 62 is an example of a "pressing member" according to the technology of the present disclosure.

[0055] The pressing member 62 presses the annular tablet AT toward the lower gate member 22. The annular tablet AT is formed by molding resin into a ring shape. The resin used for the annular tablet AT can be the same as the resin used for the cylindrical tablet CT described above, but it goes without saying that the type of resin used for the annular tablet AT and the cylindrical tablet CT may be different. The annular tablet AT is an example of an "annular tablet" according to the technology of the present disclosure.

[0056] The annular tablet AT can be formed of a resin molded body molded into an annular, preferably circular, shape having a predetermined thickness. In other words, the annular tablet AT can be said to be a resin molded body molded into a doughnut shape. The detailed dimensions of the annular tablet AT are adjusted according to the shapes of the lower mold 30 and the resin filling passage 29, the capacity of the magnet insertion hole 4, etc.

[0057] The annular tablet AT is disposed in an annular space formed between the outer peripheral wall 31 and the inner peripheral wall 32. The annular tablet AT is disposed along the circumferential direction passing through the resin filling passage 29. That is, a circumferential portion of the annular tablet AT faces the lower side of the resin filling passage 29. In other words, the pressing member 62 faces the magnet insertion hole 4 of the lower core 2B in the axial direction (here, the height direction) of the rotor core 2. The pressing member 62 may be disposed near the magnet insertion hole 4 even if it is positioned slightly away from directly below the magnet insertion hole 4. The pressing member 62 is a cylindrical member, and the cylindrical portion has inner and outer diameters approximately the same as those of the annular tablet AT. That is, the pressing member 62 is annular along the circumferential direction of the rotor core 2. The pressing member 62 supports the annular tablet AT from below.

[0058] The pressing member 62 only needs to have an annular pressing surface 62A located at the upper part thereof, and this pressing surface 62A can be arranged so as to seal the bottom of the space in which the annular tablet AT is placed inside the lower die 30. In this case, the pressing surface 62A also functions as the bottom surface of the lower die 30. Furthermore, sealing members (preferably resin sealing members) can be provided on the inner and outer peripheries of the tip of the pressing member 62 to provide a configuration that further prevents resin leakage.

[0059] The rod member 64 is movable in the vertical direction upon receiving power from a drive mechanism 70 (e.g., an actuator). When the rod member 64 moves upward, the pressing member 62 also moves upward in conjunction with the rod member 64. The pressing member 52 of the first filling mechanism 50 and the pressing member 62 of the second filling mechanism 60 can be driven independently upon receiving power from the drive mechanism 70. The drive mechanism 70 operates under the control of a control device 72.

[0060] In the present embodiment, the first filling mechanism 50 and the second filling mechanism 60 are driven by a common drive mechanism 70. However, this is merely an example. For example, the first filling mechanism 50 and the second filling mechanism 60 may be driven by independent drive mechanisms, or may share a drive source and be driven independently at the operation timing of the power transmission mechanism.

[0061] The heating unit 40 heats at least the resin disposed inside the lower mold 30. Specifically, the heating unit 40 includes a pot outer periphery heater 43A provided on the outer periphery wall 31 and a pot inner periphery heater 43B provided on the inner periphery wall 32. That is, the heating unit 40 is provided on the side where the first filling mechanism 50 and the second filling mechanism 60 are provided (here, the lower side). The pot outer periphery heater 43A is disposed inside the outer periphery wall 31 of the annular lower mold 30, for example, so as to surround the periphery of the lower mold 30. The pot inner periphery heater 43B is disposed inside the inner periphery wall 32 of the annular lower mold 30, for example, so as to surround the periphery of the lower mold 30. The heating unit 40 may further include a mold heater 41 provided in the upper mold 21. The pot outer periphery heater 43A, the pot inner periphery heater 43B, and the mold heater 41 may be, for example, infrared heaters or sheathed heaters.

[0062] As shown in FIG. 1 , the motor manufacturing apparatus 10 according to this embodiment may further include a control device 72 for controlling the above-described components. The control device 72 may be electrically connected to the above-described components and control their operation to realize any manufacturing process. The control device 72 may be communicatively connected to the components via wired or wireless communication. The control device 72 may be realized using a sequencer (e.g., a programmable logic controller, PLC) or a well-known computer. The control device 72 may be configured using only one of the above-described computers or a combination of multiple computers.

[0063] This control device 72 can realize the rotor manufacturing process according to this embodiment, which will be described later, by operating the above-mentioned components. In this regard, the rotor manufacturing process according to this embodiment can be provided in the form of a program such as software containing instructions for causing a computer constituting control device 72 to execute predetermined operations, in the form of a non-transitory recording medium on which this program is stored, or in the form of an application program provided via a network or the like. The motor core manufacturing method according to this embodiment will be described in detail later.

[0064] <Motor Manufacturing Method> Next, a motor manufacturing method according to this embodiment will be described with reference to Figures 4 and 5. Figure 4 is a flowchart showing an example of a manufacturing process carried out by the motor manufacturing apparatus shown in Figure 1. Figure 5 is a schematic explanatory diagram showing an example of the operation of the motor manufacturing apparatus. In the following description of the motor manufacturing method, a case in which the rotor core 2 is manufactured using the motor manufacturing apparatus 10 described above will be described as an example, but it is of course possible to use an apparatus other than the motor manufacturing apparatus 10, or to manufacture a stator core.

[0065] In the manufacturing method of the motor core according to this embodiment, first, as shown in FIG. 4 , a permanent magnet 3 and a rotor core 2 to which the permanent magnet 3 is to be attached are prepared, and the permanent magnet 3 is inserted into the magnet insertion hole 4 of the rotor core 2 (step S01). Next, the mold 20 and the rotor core 2 are preheated (step S02). The mold 20 can be preheated using, for example, a mold heater 41. The rotor core 2 is preheated separately from the mold 20 using a known heating means (not shown). The preheat temperature of the mold 20 and the rotor core 2 can be, for example, approximately 100 to 180°C. Note that the preheating may be performed on only one of the mold 20 and the rotor core 2.

[0066] After the preheating of the mold 20 and the rotor core 2 is completed, the rotor core 2 is placed on the lower mold gate member 22 (step S03). Next, the lower mold gate member 22 is moved upward to introduce the annular tablet AT into the lower mold 30 (step S04).

[0067] Next, the lower core 2B is moved downward, and the cylindrical tablet CT is introduced into the cylinder member 56 (step S05). The intermediate mold member 23 is placed on top of the lower core 2B (step S06). Then, the upper core 2A is placed on top of the intermediate mold member 23 (step S07). The rotor core 2 is held in the mold 20 (step S08). At this time, the upper mold 21 is adjusted to press the top surface of the rotor core 2 with a predetermined pressure, thereby tightly contacting the upper mold 21 with the top surface of the rotor core 2, and the lower mold gate member 22 with the bottom surface of the rotor core 2.

[0068] When the tablets (i.e., the annular tablet AT and the cylindrical tablet CT) are placed in the lower mold 30, the pot outer heater 43A and the pot inner heater 43B are operated to heat the tablets (step S09). The heating in the lower mold 30 is intended to reduce the viscosity of the resin forming the tablets and soften them (hereinafter referred to as "softened resin") R. The pot outer heater 43A and the pot inner heater 43B used for this heating are preferably controlled so as not to cause local temperature differences in the tablets. This heating melts the tablets, reducing their viscosity and transforming them into softened resin R with high fluidity.

[0069] 5, the softened resin R is then filled into the magnet insertion hole 4 via the first filling mechanism 50 and the second filling mechanism 60 (step S10). Specifically, in the first filling mechanism 50, the pressing member 52 is moved upward to press the cylindrical tablet CT, and the softened resin R that has been converted from the cylindrical tablet CT is injected into the intermediate mold member 23. Then, the softened resin R that has flowed through the resin filling path 24 in the intermediate mold member 23 is filled into the magnet insertion hole 4 of the upper core 2A through the gate 27.

[0070] Furthermore, in the second filling mechanism 60, the pressing member 62 is moved upward to press the annular tablet AT, and the softened resin R converted from the annular tablet AT is injected into the lower gate member 22. The softened resin R is then filled into the magnet insertion hole 4 of the lower core 2B through the resin filling path 29 of the lower gate member 22. Note that, in order to smoothly fill the magnet insertion hole 4 with the softened resin R in step S10, air holes (not shown) for venting air from inside the magnet insertion hole 4 may be provided in appropriate positions on the upper mold 21 or intermediate mold member 23, for example.

[0071] Furthermore, the timings at which the first filling mechanism 50 and the second filling mechanism 60 start and / or finish filling resin in step S10 may be the same or different. For example, if filling starts simultaneously, filling into the lower core 2B, which has the shorter resin filling path 29, may be completed first, and filling into the upper core 2A, which has the longer resin filling path 24, may be completed later. Also, for example, the timings at which the resin filling starts may be staggered so that the resin filling is completed simultaneously.

[0072] For example, if the volumes of the magnet insertion holes 4 differ between the upper core 2A and the lower core 2B, filling of the magnet insertion hole 4 with the larger volume may be started first, followed by resin filling of the magnet insertion hole 4 with the smaller volume. Furthermore, if the fluidity of the resin differs between the first filling mechanism 50 and the second filling mechanism 60, filling of the resin with the lower fluidity may be started first, followed by resin with the higher fluidity.

[0073] Furthermore, the resin filling by the first filling mechanism 50 and the second filling mechanism 60 in step S10 may be performed as separate steps. For example, the upper core 2A may be filled first, and after the upper core 2A is filled, the lower core 2B may be filled.

[0074] Once the magnet insertion holes 4 have been filled with the softened resin R, the mold heater 41 is operated to harden the softened resin R in the magnet insertion holes 4 (step S11). To harden the softened resin R, for example, it is advisable to heat it at 100 to 180°C for several minutes. As the softened resin R hardens through heating, the permanent magnets 3 are fixed in the magnet insertion holes 4 of the rotor core 2 by the resin mold. The heating time in step S11 can be adjusted as appropriate to suit the specific composition of the resin used in the tablet.

[0075] Once the above-described series of resin molding processes are complete, the upper mold 21 is raised, and the resin-molded rotor core 2 is removed from the apparatus using a transport means (not shown), such as a robot arm (step S12). The removed rotor core 2 can then be transferred to another apparatus, for example, for shaft attachment. Once the rotor core 2 has been removed, the motor manufacturing apparatus 10 is cleaned (step S13). Cleaning the motor manufacturing apparatus 10 includes removing the resin that has hardened within the resin filling passages 24 and 29. Additionally, cleaning the surface of the mold 20 and the inside of the lower mold 30, etc., using a cleaning member such as a brush, may be included. The above-described series of steps is merely an example, and the order of the steps may be changed as appropriate.

[0076] As described above, in the motor manufacturing apparatus 10 according to the first embodiment, the upper core 2A and the lower core 2B are arranged along the axial direction, and molding is performed by filling the magnet insertion holes 4 formed in each of the upper core 2A and the lower core 2B with resin. The motor manufacturing apparatus 10 is provided with a first filling mechanism 50 and a second filling mechanism 60. The first filling mechanism 50 is insertable into the through hole 5 formed in the center of the lower core 2B. The first filling mechanism 50 fills the magnet insertion holes 4 of the upper core 2A with resin. The second filling mechanism 60 is arranged along the circumferential direction of the lower core 2B and fills the magnet insertion holes 4 of the lower core 2B with resin. This allows the first filling mechanism 50 and the second filling mechanism 60 to fill the upper core 2A and the lower core 2B with resin within the same apparatus, thereby contributing to improved productivity in the rotor manufacturing process compared to a case in which the filling operation is performed separately for each of the multiple rotor cores 2.

[0077] Furthermore, because different cores are filled with resin by separate filling mechanisms, filling can be performed reliably. For example, if resin were filled into the upper core 2A and the lower core 2B through a single intermediate mold having resin filling paths that branch off above and below from a common filling mechanism, the flow of resin and the way air escapes from the magnet insertion holes 4 would be different for the upper core 2A and the lower core 2B, resulting in differences in the degree of resin filling. In this configuration, resin is filled into the upper core 2A and the lower core 2B by the first filling mechanism 50 and the second filling mechanism 60, respectively, so resin filling can be performed reliably.

[0078] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, the pressing member 62 that presses the resin in the second filling mechanism 60 faces the magnet insertion hole 4 of the lower core 2B in the axial direction. Because the resin is filled from a position facing the magnet insertion hole 4, the resin filling operation from the second filling mechanism 60 is more efficient than when the resin is filled from a position that is not directly above the magnet insertion hole 4. Specifically, the time required to pass through the resin filling path 29 can be shortened, and more resin material can be filled into the magnet insertion hole 4 than with conventional methods. This contributes to improved productivity in the rotor manufacturing process.

[0079] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, the upper core 2A and the lower core 2B are arranged with an intermediate mold member 23 sandwiched therebetween. Resin is then filled into the magnet insertion holes 4 of the upper core 2A via the intermediate mold member 23. This allows the intermediate mold member 23 to be replaced simply if the shape of the upper core 2A or the type of resin to be filled changes, making it possible to handle the production of a wide variety of products and contributing to improved productivity in the rotor manufacturing process.

[0080] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, the first filling mechanism 50 and the second filling mechanism 60 are arranged on the same side (here, the lower side) with respect to the multiple rotor cores 2. This contributes to a more compact motor manufacturing apparatus 10 compared to a case in which the first filling mechanism 50 and the second filling mechanism 60 are arranged on different sides (for example, the upper and lower sides, respectively) of the motor manufacturing apparatus 10. Furthermore, since the mechanisms and / or wiring for operating the first filling mechanism 50 and the second filling mechanism 60 can be grouped together on the same side, this contributes to a simplification of the motor manufacturing apparatus 10.

[0081] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, a pot inner heater 43B and a pot outer heater 43A are provided on the side where the first filling mechanism 50 and the second filling mechanism 60 are provided. This allows the first filling mechanism 50 and the second filling mechanism 60 to share a heating unit that heats the resin, which contributes to simplifying the configuration of the motor manufacturing apparatus 10.

[0082] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, the pressing member 52 of the first filling mechanism 50 and the pressing member 62 of the second filling mechanism 60 can operate independently of each other. This allows the pressing operations to be separated even if, for example, the shapes of the upper core 2A and the lower core 2B (e.g., axial height, volume of the magnet insertion hole 4) are different or the type of resin to be filled is different. As a result, a single motor manufacturing apparatus 10 can accommodate more complex filling conditions, contributing to improved productivity in the rotor manufacturing process.

[0083] Furthermore, in the motor manufacturing apparatus 10 according to the first embodiment, the second filling mechanism 60 includes a pressing member 62 that presses the resin, which is annular and extends in the circumferential direction of the rotor core 2. The pressing member 62 presses an annular tablet AT, which is made of resin and extends in the circumferential direction, to fill the resin into the magnet insertion holes 4. This contributes to simplifying the motor manufacturing apparatus 10 compared to, for example, using a pressing member 62 divided into arcs to press the annular tablet AT. Furthermore, by using a single annular tablet AT, resin can be filled into multiple magnet insertion holes 4, making it easier to prepare for resin filling and contributing to improved productivity.

[0084] Furthermore, by using the annular tablet AT, temperature differences are less likely to occur when the resin is heated, allowing for uniform heating. The resin heated and softened within the lower mold 30 undergoes a uniform curing reaction because temperature differences during heating are suppressed. This prevents clogging of the resin filling passage 29 and a decrease in fluidity, which may otherwise occur if the curing reaction proceeds unintentionally.

[0085] In the above embodiment, the annular pressing member 62 is described as being continuous in the circumferential direction, but the technology of the present disclosure is not limited to this. For example, the annular tablet AT may be pressed by a plurality of arc-shaped pressing members 62. However, as described above, a circumferentially continuous annular pressing member 62 is more desirable from the viewpoint of simplifying the device.

[0086] In the above embodiment, the description has been given using an example of an annular tablet AT that is continuous in the circumferential direction, but the technology of the present disclosure is not limited to this. For example, a plurality of arc-shaped tablets may be used.

[0087] <<Second Embodiment>> In the above first embodiment, an example was described in which the annular tablet AT is pressed by the annular pressing member 62 of the second filling mechanism 60, but the technology of the present disclosure is not limited to this. In the second embodiment, the second filling mechanism 60 is configured to include a plurality of pressing members 66 arranged along the circumferential direction. Note that in this embodiment, other than the configuration of the second filling mechanism 60, the configuration is basically the same as that described in the first embodiment, and therefore description thereof will be omitted.

[0088] Fig. 6 is a schematic explanatory diagram showing an example of the motor manufacturing apparatus 10 according to the present embodiment. Fig. 7 is a schematic perspective view showing an example of the first filling mechanism 50 and the second filling mechanism 60 according to the present embodiment. As shown in Figs. 6 and 7 , the second filling mechanism 60 is configured to include a plurality of pressing members 66. The second filling mechanism 60 is configured to include a plurality of pressing members 66 and a rod member 68 that moves each of the plurality of pressing members 66 up and down. The plurality of pressing members 66 are an example of the "plurality of pressing members" according to the technology of the present disclosure.

[0089] Each of the multiple pressing members 66 presses one of the multiple tablets MT toward the lower gate member 22. The multiple tablets MT are arranged in a ring shape with circumferential spacing. For example, the tablets MT are arranged at positions corresponding to the magnet insertion holes 4 of the lower core 2B. For example, the number of tablets MT corresponds to the number of magnet insertion holes 4. Note that this is merely an example, and the number of tablets MT may be fewer than the number of magnet insertion holes 4. For example, one tablet MT may be used for four magnet insertion holes 4. The tablet MT is formed by molding resin into a cylindrical shape. The resin used for the tablet MT may be the same as the resin used for the cylindrical tablet CT described above. However, it goes without saying that the type of resin may be different between the tablet MT and the cylindrical tablet CT. The multiple tablets MT are an example of "multiple tablets" according to the technology disclosed herein.

[0090] The tablet MT may have a smaller volume than the cylindrical tablet CT. The detailed dimensions of the tablet MT are adjusted according to the shapes of the lower die 30 and the resin filling passage 29, the capacity of the magnet insertion hole 4, etc.

[0091] The tablet MT is disposed in the space formed between the outer peripheral wall 31 and the inner peripheral wall 32. The tablet MT is also disposed between the resin filling path 29 and the pressing member 66. The pressing member 66 is a cylindrical member and has an outer diameter approximately the same as that of the tablet MT. In other words, the pressing member 66 supports the tablet MT from below.

[0092] 7 , four pressing members 66 are provided. The pressing members 66 are arranged circumferentially around the first filling mechanism 50. For example, the number of pressing members 66 may be determined by the number of magnet insertion holes 4.

[0093] The pressing surface 66A of the pressing member 66 may be disposed so as to seal the bottom of the space in which the tablet MT is placed inside the lower mold 30. In this case, the pressing surface 66A also functions as the bottom surface of the lower mold 30. Furthermore, sealing members (preferably resin sealing members) may be provided on the inner and outer peripheries of the tip of the pressing member 66 to provide an even more effective measure against resin leakage.

[0094] Each of the rod members 68 is movable in the vertical direction by receiving power from a drive mechanism 70 (e.g., an actuator). When the rod members 68 move upward, the pressing member 66 also moves upward in conjunction with the movement of the rod members 68. The multiple rod members 68 may operate synchronously or independently of each other.

[0095] In the second filling mechanism 60, each of the multiple pressing members 66 is moved upward to press each of the multiple tablets MT, and the softened resin R converted from the tablets MT is injected into the lower gate member 22. Then, the softened resin R is filled from the resin filling path 29 of the lower gate member 22 into the magnet insertion hole 4 of the lower core 2B.

[0096] As described above, in the motor manufacturing apparatus 10 according to the second embodiment, in the second filling mechanism 60, a plurality of pressing members 66 are arranged along the circumferential direction of the rotor core 2, and each of the plurality of tablets MT is pressed by a respective one of the plurality of pressing members 62, thereby filling resin into the magnet insertion holes 4. This allows the tablets MT to be placed at positions corresponding to the magnet insertion holes 4, thereby eliminating the use of excess resin and contributing to improved yield.

[0097] In the above-described embodiments, the first filling mechanism 50 and the second filling mechanism 60 are disposed below the rotor core 2 in the motor manufacturing apparatus 10. However, the technology of the present disclosure is not limited to this. For example, the first filling mechanism 50 and the second filling mechanism 60 may be disposed above the rotor core 2.

[0098] Furthermore, in the above-described embodiments, the first filling mechanism 50 and the second filling mechanism 60 are arranged on the same side of the rotor core 2. However, the technology of the present disclosure is not limited to this. The first filling mechanism 50 and the second filling mechanism 60 may be arranged on different sides of the rotor core 2 (e.g., the first filling mechanism 50 is on the upper side and the second filling mechanism 60 is on the lower side). In this case, the first filling mechanism 50 is inserted into the through hole 5 of the upper core 2A and is capable of filling resin into the magnet insertion hole 4 of the upper core 2A through the resin filling path formed inside the intermediate mold member 23. The second filling mechanism 60 fills resin into the magnet insertion hole 4 of the lower core 2B through the resin filling path 29 of the lower mold gate member 22. However, as described above, arranging the first filling mechanism 50 and the second filling mechanism 60 on the same side is preferable from the perspective of miniaturization and simplification of the device.

[0099] Furthermore, in the above-described embodiments, an example in which two rotor cores, an upper core 2A and a lower core 2B, are arranged as the multiple rotor cores 2 has been described. However, the technology of the present disclosure is not limited to this. For example, four rotor cores may be arranged along the axial direction. In this case, the two upper rotor cores are filled with resin by a first filling mechanism 50 and a second filling mechanism 60 provided on the upper side of the motor manufacturing apparatus 10. The two lower rotor cores are filled with resin by a first filling mechanism 50 and a second filling mechanism 60 provided on the lower side of the motor manufacturing apparatus 10.

[0100] Alternatively, for example, three rotor cores may be arranged along the axial direction. In this case, the middle and bottom rotor cores are filled with resin by a first filling mechanism 50 and a second filling mechanism 60 provided below the motor manufacturing apparatus 10. The top rotor core 2 is filled with resin by the first filling mechanism 50 or the second filling mechanism 60 provided above the motor manufacturing apparatus 10.

[0101] In addition, in the above-described embodiments, examples have been described in which the rotor cores 2 are stacked in multiple stages and then filled with resin, but the technology of the present disclosure is not limited to this. For example, the stator cores may be stacked in multiple stages, or the rotor cores 2 and the stator cores may be combined and stacked and then filled with resin.

[0102] The above-described description and illustrations are a detailed explanation of the parts related to the technology of the present disclosure and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, functions, actions, and effects is an explanation of an example of the configuration, functions, actions, and effects of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above-described description and illustrations within the scope of the gist of the technology of the present disclosure. Furthermore, to avoid confusion and facilitate understanding of the parts related to the technology of the present disclosure, the above-described description and illustrations omit explanations of common technical knowledge that do not require particular explanation to enable the implementation of the technology of the present disclosure.

[0103] In this specification, "A and / or B" is synonymous with "at least one of A and B." In other words, "A and / or B" means that it may be only A, only B, or a combination of A and B. Furthermore, in this specification, the same concept as "A and / or B" is also applied when three or more things are expressed by connecting them with "and / or."

[0104] All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

[0105] The following supplementary notes are further disclosed regarding the above embodiments. <Supplementary Note 1> A motor manufacturing apparatus for molding a plurality of cylindrical cores arranged in an axial direction by filling a resin into a resin-filled portion provided in each of the cores, the motor manufacturing apparatus comprising: a first filling mechanism insertable into a through hole provided in a center of the plurality of cores and capable of filling the resin into the resin-filled portion of a first core of the plurality of cores; and a second filling mechanism arranged circumferentially around the plurality of cores and filling the resin into the resin-filled portion of a second core of the plurality of cores. <Supplementary Note 2> The motor manufacturing apparatus according to Supplementary Note 1, wherein a pressing member that presses the resin in the second filling mechanism faces the resin-filled portion of the second core in the axial direction. <Supplementary Note 3> The motor manufacturing apparatus according to Supplementary Note 1 or Supplementary Note 2, wherein the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and the resin is filled into the first core via the intermediate mold member. <Supplementary Note 4> The motor manufacturing device according to any one of Supplementary Notes 1 to 3, wherein the first filling mechanism and the second filling mechanism are arranged on the same side with respect to the plurality of cores. <Supplementary Note 5> The motor manufacturing device according to Supplementary Note 4, wherein a heating unit capable of heating the resin is provided on the side where the first filling mechanism and the second filling mechanism are provided. <Supplementary Note 6> The motor manufacturing device according to any one of Supplementary Notes 1 to 5, wherein the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are operable independently of each other. <Supplementary Note 7> The motor manufacturing device according to any one of Supplementary Notes 1 to 6, wherein the second filling mechanism includes a pressing member that presses the resin and is annular along the circumferential direction, and wherein the resin is filled into the resin filling portion by the pressing member pressing an annular tablet that is formed from the resin and is annular along the circumferential direction. <Appendix 8> The motor manufacturing apparatus according to any one of Appendices 1 to 6, wherein the second filling mechanism includes a plurality of pressing members arranged along a circumferential direction and pressing the resin, and wherein each of the plurality of pressing members presses each of a plurality of tablets made of the resin, thereby filling the resin into the resin filling portion.<Supplementary Note 9> The motor manufacturing apparatus according to any one of Supplementary Notes 1 to 8, wherein the plurality of cores include cores of different shapes. <Supplementary Note 10> A method for manufacturing a motor, comprising: arranging a plurality of cylindrical cores along an axial direction; and filling the resin via a first filling mechanism that is insertable into an opening provided in a center of the plurality of cores and is capable of filling the resin into the resin-filled portion of a first core of the plurality of cores, and a second filling mechanism that is a filling mechanism arranged along the circumferential direction of the plurality of cores and is configured to fill the resin into the resin-filled portion of a second core of the plurality of cores. <Supplementary Note 11> The motor manufacturing method according to Supplementary Note 10, wherein a pressing member that presses the resin in the second filling mechanism faces the resin-filled portion of the second core in the axial direction. <Supplementary Note 12> The motor manufacturing method according to Supplementary Note 10 or Supplementary Note 11, wherein the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and the resin is filled into the first core via the intermediate mold member. <Supplementary Note 13> A method for manufacturing a motor according to any one of Supplementary Notes 10 to 12, wherein the first filling mechanism and the second filling mechanism are arranged on the same side with respect to the plurality of cores. <Supplementary Note 14> A method for manufacturing a motor according to Supplementary Note 13, wherein a heating unit capable of heating the resin is provided on the side where the first filling mechanism and the second filling mechanism are provided. <Supplementary Note 15> A method for manufacturing a motor according to any one of Supplementary Notes 10 to 14, wherein the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are operable independently of each other. <Supplementary Note 16> A method for manufacturing a motor according to any one of Supplementary Notes 10 to 15, wherein the second filling mechanism includes a pressing member that presses the resin and is annular along the circumferential direction, and an annular tablet formed from the resin and annular along the circumferential direction is pressed by the pressing member, thereby filling the resin into the resin filling portion.<Supplementary Note 17> The method for manufacturing a motor according to any one of Supplementary Notes 10 to 15, wherein the second filling mechanism includes a plurality of pressing members that are arranged along the circumferential direction and press the resin, and wherein the resin is filled into the resin filling portion by pressing each of the plurality of pressing members. <Supplementary Note 18> The method for manufacturing a motor according to any one of Supplementary Notes 10 to 17, wherein the plurality of cores include cores with different shapes.

[0106] The disclosure of Japanese Patent Application No. 2024-055082, filed on March 28, 2024, is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard was specifically and individually indicated to be incorporated by reference.

Claims

1. A motor manufacturing device that fills resin into a resin filling portion provided in each of a plurality of cylindrical cores arranged along an axial direction, the device comprising: a first filling mechanism that can be inserted into a through hole provided in the center of the plurality of cores and can fill the resin into the resin filling portion of a first core of the plurality of cores; and a second filling mechanism that is arranged along the circumferential direction of the plurality of cores and fills the resin into the resin filling portion of a second core of the plurality of cores.

2. The motor manufacturing device according to claim 1, wherein a pressing member that presses the resin in the second filling mechanism faces the resin-filled portion of the second core in the axial direction.

3. The motor manufacturing device according to claim 1, wherein the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and the resin is filled into the first core via the intermediate mold member.

4. The motor manufacturing device according to claim 1, wherein the first filling mechanism and the second filling mechanism are arranged on the same side of the plurality of cores.

5. The motor manufacturing device according to claim 4, wherein a heating section capable of heating the resin is provided on the side where the first filling mechanism and the second filling mechanism are provided.

6. The motor manufacturing device according to claim 1, wherein the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are operable independently of each other.

7. The motor manufacturing device according to claim 1, wherein the second filling mechanism includes a pressing member that presses the resin and is annular along the circumferential direction, and an annular tablet formed from the resin and annular along the circumferential direction is pressed by the pressing member, thereby filling the resin into the resin filling section.

8. A motor manufacturing device as set forth in claim 1, wherein the second filling mechanism includes a plurality of pressing members arranged along the circumferential direction and pressing the resin, and wherein each of the plurality of pressing members presses each of a plurality of tablets made of the resin, thereby filling the resin into the resin filling section.

9. The motor manufacturing device according to claim 1, wherein the plurality of cores include cores of different shapes.

10. A method for manufacturing a motor, comprising: arranging a plurality of cylindrical cores along the axial direction; and filling the resin through a first filling mechanism that can be inserted into an opening provided in the center of the plurality of cores and can fill the resin into the resin filling portion of a first core of the plurality of cores, and a second filling mechanism that is a filling mechanism arranged along the circumferential direction of the plurality of cores and fills the resin into the resin filling portion of a second core of the plurality of cores.

11. The method for manufacturing a motor according to claim 10, wherein a pressing member that presses the resin in the second filling mechanism faces the resin-filled portion of the second core in the axial direction.

12. A method for manufacturing a motor as set forth in claim 10, wherein the first core and the second core are arranged with an intermediate mold member sandwiched therebetween, and the resin is filled into the first core via the intermediate mold member.

13. The method for manufacturing a motor according to claim 10, wherein the first filling mechanism and the second filling mechanism are arranged on the same side of the plurality of cores.

14. The motor manufacturing method according to claim 13, wherein a heating section capable of heating the resin is provided on the side where the first filling mechanism and the second filling mechanism are provided.

15. The motor manufacturing method according to claim 10, wherein the pressing member of the first filling mechanism and the pressing member of the second filling mechanism are operable independently of each other.

16. A method for manufacturing a motor as described in claim 10, wherein the second filling mechanism includes a pressing member that presses the resin and is annular in the circumferential direction, and an annular tablet formed from the resin and annular in the circumferential direction is pressed by the pressing member, thereby filling the resin into the resin filling section.

17. A method for manufacturing a motor as described in claim 10, wherein the second filling mechanism includes a plurality of pressing members arranged along the circumferential direction and pressing the resin, and wherein each of the plurality of pressing members presses each of a plurality of tablets made of the resin, thereby filling the resin into the resin filling section.

18. The method for manufacturing a motor according to claim 10, wherein the plurality of cores include cores of different shapes.

Images