JP7302418B2 - Rotating electric machine rotor manufacturing method and rotating electric machine rotor manufacturing apparatus - Google Patents

Description

The present invention relates to a method for manufacturing a rotating electric machine rotor and a manufacturing apparatus for a rotating electric machine rotor.

2. Description of the Related Art Conventionally, there is a rotary electric machine rotor used for, for example, an electric motor or a generator in which a rod-shaped magnet is inserted into a magnet insertion hole provided in a rotor core in which a plurality of core plates made of a soft magnetic material are laminated (for example, See Patent Document 1).

The rotor disclosed in Patent Document 1 has a circular rotor body and a rotor core mounted on the outer peripheral side of the rotor body. The rotor core is formed by laminating thin steel plates in the axial direction, and is provided with a plurality of magnet insertion holes extending in the lamination direction at regular intervals in the circumferential direction. A manufacturing apparatus for manufacturing this rotor includes a cylindrical magnet guide provided with a plurality of guide grooves for temporarily holding the magnets inserted into the magnet insertion holes, and the magnets temporarily held in the guide grooves of the magnet guide on the rotor core. A pusher having a plurality of pressing portions to be pushed into the magnet insertion hole is provided.

The rotor body has a boss portion formed in the center, an outer peripheral wall formed concentrically with the boss portion, and a circular wall integrally and directly connecting the boss portion and the outer peripheral wall. The outer peripheral wall is provided with a key groove at one place in the circumferential direction. On the other hand, the magnet guide has an alignment key screwed to the bottom plate facing the rotor body. When the magnet temporarily held by the magnet guide is pushed into the magnet insertion hole of the rotor core, the magnet guide and the rotor body are relatively aligned by fitting the key into the key groove.

JP-A-2006-20379

In recent years, electric motors have come to be widely used as a drive source for automobiles, and there is a demand for even higher efficiency. In order to increase the efficiency of the electric motor, it is desirable to make the magnet insertion hole small and to minimize the gap between the inner surface of the magnet insertion hole and the outer surface of the magnet. In order to narrow this gap, it is necessary to align the rotor core and the jig (magnet guide) that temporarily holds the magnets with high accuracy. In this regard, the method of positioning the key by fitting the key into the keyway, as disclosed in Patent Literature 1, cannot necessarily prevent radial misalignment between the magnet guide and the rotor main body. In addition, there is a risk of being affected by the assembly accuracy between the rotor main body and the rotor core, and the configuration does not necessarily allow highly accurate alignment.

Accordingly, the present invention provides an insertion jig formed with a plurality of guide holes for guiding a rod-shaped body made of a hard magnetic material, and a rotor core formed with a plurality of insertion holes into which the rod-shaped bodies pushed out from the guide holes are inserted. It is an object of the present invention to provide a rotating electric machine rotor manufacturing method and a rotating electric machine rotor manufacturing apparatus capable of relatively aligning with high accuracy.

In order to achieve the above object, the present invention has a plurality of core plates made of a soft magnetic material stacked, a plurality of insertion holes extending in the stacking direction of the plurality of core plates, and a plurality of insertion holes extending in the stacking direction of the plurality of core plates. a rotor core forming step of forming a rotor core provided with a plurality of through holes different from the plurality of extending insertion holes ; and a hard magnetic material applied to each of the plurality of insertion holes of the rotor core while the rotor core is placed on a pallet. and an inserting step of inserting a rod-shaped body composed of and are relatively positioned by engagement of the engaging portion, and inserting each of the plurality of rod-shaped bodies into the plurality of insertion holes through the plurality of guide holes; The pallet is lifted vertically upward by contacting the top surface of the support column against the bottom surface of the pallet, and the bottom surface of the pallet slides on the top surface of the support column. relatively aligning the insertion jig and the rotor core by engaging the engagement portion in a state in which the rotor core can move horizontally relative to the insertion jig by moving the rotor core; A method for manufacturing an electric machine rotor is provided.

Further, in order to achieve the above object, the present invention is formed by stacking a plurality of core plates made of a soft magnetic material, including a plurality of insertion holes extending in the stacking direction of the plurality of core plates, and the plurality of core plates. and a plurality of rod-shaped bodies made of a hard magnetic material, wherein the plurality of rod-shaped bodies are inserted into the plurality of insertion holes, respectively. A manufacturing apparatus for an inserted rotary electric machine rotor, comprising: a main body portion formed with a plurality of guide holes for temporarily holding the plurality of rod-shaped bodies; and an engaging portion protruding downward from the main body portion. When inserting the plurality of rod-shaped bodies into the plurality of insertion holes, the pallet on which the rotor core is placed is lifted vertically upward using a lifter having a plurality of support columns, and the pallet With the lower surface sliding on the tip end surface of the support column, the rotor core can move horizontally relative to the insertion jig, and the engaging portion engages with the through hole . Provided is a rotary electric machine rotor manufacturing apparatus in which an insertion jig and the rotor core are relatively aligned.

According to the rotary electric machine rotor manufacturing method and the rotary electric machine rotor manufacturing apparatus according to the present invention, an insertion jig having a plurality of guide holes for guiding a rod-shaped body made of a hard magnetic material and a guide hole pushed out from the guide hole It is possible to perform high-precision relative positioning with the rotor core having a plurality of insertion holes into which the rod-shaped bodies are inserted.

1 is a configuration diagram showing a rotary electric machine having a rotary electric machine rotor manufactured by a manufacturing method and manufacturing apparatus according to an embodiment of the present invention; FIG. (a) is a perspective view showing a rotor. (b) is a cross-sectional view showing the rotor in an axial cross-section along the rotation axis. FIG. 4 is a plan view showing one core plate; It is explanatory drawing which shows a rotor core formation process. (a) is an explanatory view showing the first stage of the insertion process. (b) is a partially enlarged view of (a). (a) and (b) are explanatory views showing a state in which shaft portions of a pair of pins are inserted into circulation holes. It is explanatory drawing which shows the 2nd stage of an insertion process. It is explanatory drawing which shows a fixing process. (a) and (b) show the insertion jig in side view and top view, and part of (a) shows a cross section taken along line AA of (b). (a) shows the lower surface of the insertion jig, (b) is a cross-sectional view taken along line BB of (a), and (c) is a cross-sectional view taken along line CC of (a). (a) to (b) are perspective views showing a holding plate and a pair of pins.

[Embodiment]
An embodiment of the present invention will be described with reference to FIGS. 1 to 11. FIG. It should be noted that the embodiment described below is shown as a preferred specific example for carrying out the present invention, and there are portions that specifically illustrate various technically preferable technical matters. , the technical scope of the present invention is not limited to this specific embodiment.

(Configuration of rotating electric machine)
FIG. 1 is a configuration diagram showing a rotary electric machine having a rotary electric machine rotor (hereinafter simply referred to as "rotor") manufactured by a manufacturing method and manufacturing apparatus according to an embodiment of the present invention.

This rotating electric machine 100 has a stator 1 and a rotor 2 . The stator 1 is non-rotatably fixed to a housing (not shown). A shaft 10 is inserted through the center of the rotor 2 and rotates integrally with the shaft 10 . The rotating electric machine 100 is mounted on, for example, an electric vehicle or a so-called hybrid vehicle as a motor that generates driving force, as a generator that converts the rotational force of the shaft 10 into electrical energy, or as a motor generator that has both functions. be.

The stator 1 includes a stator core 11 and multiple coils 12 . The stator core 11 integrally includes a cylindrical base portion 111, a plurality of teeth 112 protruding radially inward from the base portion 111, and a plurality of fixed portions 113 protruding radially outward from the base portion 111. have. In the illustrated example of FIG. 1 , the stator core 11 has 15 teeth 112 and the coil 12 is wound around each tooth 112 . The fixed portion 113 is formed with a bolt insertion hole 113a through which a bolt for fixing the stator core 11 to the housing is inserted.

FIG. 2(a) is a perspective view showing the rotor 2. FIG. FIG. 2(b) is a cross-sectional view showing the rotor 2 in an axial cross section along the rotation axis O. As shown in FIG. The rotor 2 has a rotor core 21 and a plurality of magnets 22 held by the rotor core 21 . The rotor core 21 is constructed by stacking a plurality of core plates 3 made of a soft magnetic material in a stacking direction parallel to the rotation axis O. As shown in FIG. In addition, in FIG. 2, the thickness of the core plate 3 is exaggerated for clarity of explanation.

The rotor core 21 is provided with a central hole 210 through which the shaft 10 is inserted, a plurality of insertion holes 211 into which the plurality of magnets 22 are respectively inserted, and a plurality of circulation holes 212 through which a cooling liquid for cooling the magnets 22 flows. It is Coolant for cooling the rotor core 21 due to iron loss generated by the magnetic field of the plurality of coils 12 is supplied to the circulation hole 212 .

The center hole 210, the plurality of insertion holes 211, and the plurality of communication holes 212 penetrate the rotor core 21 in the axial direction (the stacking direction of the plurality of core plates 3). In this embodiment, the insertion hole 211 and the circulation hole 212 extend parallel to the rotation axis O, but the insertion hole 211 and the circulation hole 212 are inclined with respect to the rotation axis O and are formed into a plurality of sheets. It may extend in the stacking direction of the core plate 3 .

The rotor core 21 also has a pair of protrusions 21a that are fitted into the pair of key grooves 10a (shown in FIG. 1) of the shaft 10, respectively. The shaft 10 is restricted from rotating relative to the rotor core 21 by fitting the projections 21a into the key grooves 10a.

FIG. 3 is a plan view showing one core plate 3. FIG. The core plate 3 is formed by pressing an electromagnetic steel sheet. The core plate 3 is provided with a center hole 30, a plurality of through holes 31 for inserting magnets, and a plurality of through holes 32 for circulating cooling liquid. The plurality of through holes 31 and the plurality of through holes 32 are formed together with the central hole 30 by one press working. The core plate 3 also has a pair of tongues 3a. The projections 21a of the rotor core 21 are formed by the tongues 3a of the plurality of laminated core plates 3, respectively.

The through hole 31 for magnet insertion is formed in an elongated hole shape, and the major axis direction thereof is inclined with respect to the radial direction and the circumferential direction of the core plate 3 . More specifically, ten through holes 31 for inserting magnets whose long axis direction is inclined at a predetermined angle to one side at an angle of less than 90° with respect to the radial direction of the core plate 3 and the long axis direction of which is the core plate 3 Ten through-holes 31 for magnet insertion are formed alternately along the circumferential direction of the core plate 3 .

In the present embodiment, ten through holes 32 for coolant circulation are formed radially inside the core plate 3 with respect to the plurality of through holes 31 for magnet insertion. Each through-hole 32 for cooling liquid circulation has a rounded rectangular shape with semicircular ends. In addition, in the present embodiment, the ten through-holes 32 for cooling liquid flow include four elongated through-holes 321 with relatively long longitudinal lengths and six elongated through-holes 321 with relatively short longitudinal lengths. It consists of a short through-hole 322 .

The rotor core 21 is formed by stacking a plurality of core plates 3 so that the center holes 30 of the respective core plates 3 communicate with each other to form a center hole 210, and a plurality of through holes for inserting magnets of the respective core plates 3 are formed. 31 communicate in the stacking direction to form a plurality of insertion holes 211 , and the plurality of through holes 32 for coolant circulation of each core plate 3 communicate in the stacking direction to form a plurality of circulation holes 212 .

The magnet 22 has a quadrangular prism shape with a rectangular cross section perpendicular to the longitudinal direction. Magnets 22 are fixed to rotor core 21 by resin 23 that fills insertion holes 211 . The longitudinal end surfaces of the magnets 22 are covered with a resin 23 . The magnet 22 is a rod-shaped hard magnetic body obtained by sintering powder such as ferrite or neodymium, for example. be done. In addition, in FIG.2(b), the thickness of the resin 23 is exaggerated and illustrated for clarification of description.

(Manufacturing method of rotor)
Next, a method for manufacturing the rotor 2 and a manufacturing apparatus A for manufacturing the rotor 2 by this manufacturing method will be described. The manufacturing method of the rotor 2 includes a core plate forming step of forming a plurality of core plates 3 each having a plurality of through holes 31 and 32 formed therein, a plurality of core plates 3 being laminated, and a plurality of core plates 3 being laminated. a rotor core forming step of forming a rotor core 21 provided with a plurality of insertion holes 211 extending in a direction and a plurality of circulation holes 212 for circulating a cooling liquid; An insertion step of inserting a rod-shaped body 220 (described later), a fixing step of fixing the rod-shaped body 220 in the insertion hole 211, and a magnetization of the rod-shaped body 220 fixed in the insertion hole 211 into the magnet 22 It has a process.

In the core plate forming step, the core plate 3 is formed by pressing a thin electromagnetic steel sheet. In the rotor core forming process, a plurality of core plates 3 are piled up and laminated in the thickness direction.

FIG. 4 is an explanatory diagram showing the rotor core forming process. Stacking of the core plates 3 is performed by sequentially stacking a plurality of core plates 3 on the pallet 4 in the vertical direction. In FIG. 4, the bottom of the drawing corresponds to the bottom in the vertical direction, and the top of the drawing corresponds to the top in the vertical direction. Hereinafter, the terms "upper" and "lower" refer to vertical directions.

The pallet 4 includes a base plate 41, a lower plate 42 arranged above the base plate 41, an upper plate 43 arranged above the lower plate 42, and a plurality of plates against which the rod-shaped bodies 220 are abutted in an insertion step described later. a butting pin 44, a cylindrical body 45 with a bottom disposed on the base plate 41, a plurality of fixing pins 46 for fixing the cylindrical body 45 to the base plate 41, and a curl in the fixing process. It has a plurality of positioning pins 47 for positioning a plate (described later).

The base plate 41 is larger than the lower plate 42 and the upper plate 43 and has a rectangular shape when viewed in the vertical direction. A lower surface 41a of the base plate 41 is formed as a flat surface without projections. The tubular body 45 has a cylindrical tubular portion 451 and a disk-shaped bottom portion 452 , and the lower end portion of the tubular portion 451 is inserted through the center portions of the lower plate 42 and the upper plate 43 to contact the base plate 41 . in contact with The bottom portion 452 closes the upper end portion of the tubular portion 451 . A plurality of positioning pins 47 protrude upward from an upper surface 452 a of the bottom portion 452 .

The abutting pin 44 has a large-diameter portion 441 inserted through an insertion hole 430 formed in the upper plate 43 and a small-diameter portion 442 protruding above the upper surface 43 a of the upper plate 43 . It is prevented from coming off from the insertion hole 430 . A plurality of abutting pins 44 are provided corresponding to each of the plurality of insertion holes 211 , and are arranged so that the small-diameter portions 442 protrude into the insertion holes 211 .

The core plate 3 is laminated on the upper plate 43 so that the cylindrical body 45 is inserted through the center hole 30 . A plurality of core plates 3 are stacked as a single block. A plurality of core plates 3 of each block are connected to each other by crimping (for example, dowel crimping), and the blocks are joined by welding, for example. The rotor core 21 made up of a plurality of core plates 3 stacked in the stacking process is transported together with the pallet 4 to the position to be processed where the inserting process and the fixing process are performed.

FIG. 5(a) is an explanatory view showing the first stage of the insertion process. FIG. 5(b) is a partially enlarged view of FIG. 5(a). In the inserting step, the insertion jig 7 is used to insert the plurality of rod-shaped bodies 220 into the plurality of insertion holes 211 respectively. The pallet 4 and the rotor core 21 are conveyed by a roller conveyor 5 having a plurality of rollers 50 , come into contact with stoppers (not shown) and stop at a predetermined position, and are lifted upward by a lifter 6 having a plurality of support columns 61 .

The support column 61 moves up and down so as to protrude upward from between the two adjacent rollers 50 , and its tip surface 61 a abuts on the lower surface 41 a of the base plate 41 . The pallet 4 can move horizontally relative to the insertion jig 7 by sliding the lower surface 41 a of the base plate 41 on the tip surface 61 a of the support column 61 . When the pallet 4 and rotor core 21 are lifted by the lifter 6 , the upper end of the rotor core 21 is placed inside the recess 70 of the insertion jig 7 .

The insertion jig 7 is fixed to the main body 71 by means of a main body 71 , a frame 72 supporting and fixing the main body 71 , a plurality of ball plungers 73 attached to the side surfaces of the main body 71 , and a plurality of bolts 74 facing the rotor core 21 . and a plurality of positioning pins 76 respectively held by the plurality of holding plates 75 . The concave portion 70 is formed by a circular through hole 720 penetrating the frame 72 in the vertical direction. The main body 71 is arranged to partially close the opening 720 and is fixed to the frame 72 with a plurality of bolts 77 .

The main body 71 is formed with a plurality of guide holes 711 for temporarily holding the plurality of rod-shaped bodies 220 respectively. The rod-shaped body 220 arranged in the guide hole 711 is held by the plurality of ball plungers 73 so as not to fall. The ball plunger 73 has a ball that protrudes into the guide hole 711. Rotation of the ball allows the rod-like body 220 to move vertically, and pressing of the ball prevents the rod-like body 220 from free falling. The plurality of rod-shaped bodies 220 are housed in each of the plurality of guide holes 711 in advance before the upper end portion of the rotor core 21 is arranged in the recess 70 of the insertion jig 7 .

A plurality of positioning pins 76 are engaged with the flow holes 212 of the rotor core 21 to position the insertion jig 7 and the rotor core 21 relative to each other as shown in FIG. FIG. 6(a) shows a state in which shaft portions 761 of a pair of pins 76 are inserted into circulation holes 212 formed by a plurality of long through-holes 321, and FIG. 6(b) shows a plurality of short through-holes. 322 shows a state in which the shaft portions 761 of the pair of pins 76 are inserted into the through holes 212 formed by the arrows 322 . As shown in FIGS. 6A and 6B, the shaft portions 761 of the pair of pins 76 are engaged with both longitudinal end portions of the through hole 212 when viewed in the axial direction. A plurality of pins 76 constitute the engaging portion of the present invention. Details of the shape of the pin 76 and the configuration of the retainer plate 75 as a retaining member that retains and retains the pin 76 will be described later.

FIG. 7 is an explanatory diagram showing the second stage of the insertion process. In the second stage, the insertion jig 7 and the rotor core 21 are relatively aligned by engaging the plurality of pins 76 , and the plurality of rod-shaped bodies 220 are pushed into the guide holes of the insertion jig 7 by the pushing jig 8 . 711 and inserted into the insertion hole 211 of the rotor core 21 . The pushing jig 8 has a plurality of rods 81 respectively corresponding to the plurality of rod-shaped bodies 220 and a movable plate 82 to which upper ends of the plurality of rods 81 are fixed. move up and down with A vacuum hole (not shown) for sucking the rod-shaped body 220 is opened in the tip end face of the rod 81 that contacts the end face of the rod-shaped body 220 . 7 shows only two rod-shaped bodies 220 and rods 81 out of twenty rod-shaped bodies 220 and rods 81. As shown in FIG.

FIG. 8 is an explanatory diagram showing the fixing process. In the fixing step, the cull plate 91 is arranged on the rotor core 21, the upper die 92 is further arranged above the cull plate 91, and the resin 23 (FIG. 2B) for fixing the rod-shaped body 220 in the insertion hole 211 is applied. ) is injected into the insertion hole 211 .

The upper die 92 is formed with an insertion hole 920 into which the cylindrical resin base material 90 made of thermosetting resin is inserted. A filling pot 910 for introducing the resin base material 90 into the insertion hole 211 of the rotor core 21 is formed in the cull plate 91 . The cull plate 91 has fitting holes 911 into which the positioning pins 47 are fitted, and is positioned by fitting the positioning pins 47 into the fitting holes 911 .

The resin base material 90 is pressed by the plunger 93 and introduced into the gap between the inner surface of the insertion hole 211 and the rod-shaped body 220 through the filling pot 910 while being melted by heat. When the temperature drops, the resin 23 solidifies and the rod-shaped body 220 is fixed in the insertion hole 211 . In the filling pot 910, cull, which is an unnecessary cured product of the resin, remains. The remaining cull is removed from the rotor core 21 together with the cull plate 91 .

After that, a strong magnetic field is applied to the rod-shaped bodies 220 in the magnetizing process, and the rod-shaped bodies 220 are magnetized to become the magnets 22, and the rotor 2 is completed. The rotor 2 is combined with the stator 1 to form a rotating electric machine 100 .

Next, the configuration of the insertion jig 7 will be described in detail with reference to FIGS. 9 to 11. FIG. 9(a) and (b) show the insertion jig 7 in side view and top view, and part of (a) shows a cross section taken along the line AA in (b). 10(a) shows the lower surface of the insertion jig 7, (b) is a cross-sectional view taken along line BB of (a), and (c) is a cross-sectional view taken along line CC of (a). 11A, 11B, and 11C are perspective views showing the holding plate 75 and the pair of pins 76. FIG.

As shown in FIG. 10C, the ball 731 of the ball plunger 73 protrudes into the guide hole 711 . In this embodiment, four ball plungers 73 are provided for one guide hole 711 , and the ball 731 of each ball plunger 73 protrudes from the inner surface 711 a of the guide hole 711 .

The pin 76 has a cylindrical shaft portion 761 with a tapered tip, a disc-shaped flange portion 762 with a larger diameter than the shaft portion 761 , and a cylindrical base portion 763 with a smaller diameter than the flange portion 762 . integrally has The flange portion 762 is arranged between the shaft portion 761 and the base portion 763, and the shaft portion 761, the flange portion 762, and the base portion 763 are arranged concentrically along the axial direction.

The holding plate 75 has a rectangular flat plate shape, and is formed with a pair of screw holes 751 into which the bolts 77 are screwed and a pair of insertion holes 752 through which the shaft portions 761 of the pins 76 are inserted. ing. Peripheral portions of the pair of insertion holes 752 form contact portions 753 that contact the flange portion 762 to prevent the pin 76 from coming off. The inner diameter of the insertion hole 752 is formed larger than the outer diameter of the shaft portion 761 .

The pin 76 is positioned with respect to the main body 71 by fitting the base portion 763 into a fitting hole 712 formed in the main body 71 . A recessed portion 713 in which the holding plate 75 is accommodated is formed in the lower surface 71a of the main body 71 . The holding plate 75 is fixed to the main body 71 by screwing a pair of bolts 74 inserted through bolt insertion holes 714 formed in the main body 71 into screw holes 751 . The shaft portion 761 of the pin 76 is inserted through the insertion hole 752 of the holding plate 75 so that the tip portion opposite to the flange portion 762 protrudes below the lower surface 71 a of the main body 71 .

A shaft portion 761 of the pin 76 has a tapered outer peripheral surface 761a at the tip. In the insertion step, the rotor core 21 is aligned with the insertion jig 7 by bringing the inner edge of the flow hole 212 of the rotor core 21 into contact with the tapered outer peripheral surface 761 a of the shaft portion 761 . That is, when the rotor core 21 is misaligned with respect to the insertion jig 7, the outer peripheral surface 761a of the shaft portion 761 formed in a tapered shape abuts against the inner edge of the communication hole 212, causing the communication hole 212 to have a pair of The insertion jig 7 is moved relative to the rotor core 21 so that the shaft portion 761 of the pin 76 is inserted (see FIGS. 6A and 6B), and the rotor core 21 is aligned with the insertion jig 7. be. A plurality of rod-shaped bodies 220 are inserted into the insertion holes 211 of the rotor core 21 through the guide holes 711 of the insertion jig 7 while maintaining the engagement state between the shaft portion 761 of the pin 76 and the through hole 212 .

(Actions and effects of the embodiment)
According to the embodiment described above, when inserting the plurality of rod-shaped bodies 220 into the insertion holes 211 of the rotor core 21, the shaft portions 761 of the pins 76 are engaged with the plurality of circulation holes 212 formed in the rotor core 21. Thus, the insertion jig 7 and the rotor core 21 are positioned relative to each other. Therefore, even if the size of the insertion hole 211 as viewed in the axial direction is reduced to the same size as the cross section of the rod-like body 220 perpendicular to the longitudinal direction, , the rod-shaped body 220 can be inserted into the insertion hole 211 .

Since the inner edge of the through hole 212 of the rotor core 21 contacts the tapered outer peripheral surface 761 a of the shaft portion 761 , the rotor core 21 is aligned with the insertion jig 7 . It is possible to align the rotor core 21 and the insertion jig 7 with high accuracy without providing an actuator or the like for moving the rotor 4 .

Further, the pin 76 is positioned with respect to the main body 71 by fitting the base portion 763 into a fitting hole formed in the main body 71, and is prevented from coming off by the retaining plate 75. The positional accuracy of the pin 76 with respect to the main body 71 can be improved as compared with the case where the pin 76 is fixed by screwing it into the body 71 .

(Appendix)
As described above, the present invention has been described based on the embodiments, but the embodiments do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

In addition, the present invention can be modified appropriately by omitting a part of the configuration, or by adding or replacing the configuration without departing from the gist of the invention. For example, in the above embodiment, four holding plates 75 are attached to the insertion jig 7, and two pins 76 are held by each holding plate 75. However, the number of holding plates 75 and pins 76 is However, if the insertion jig 7 has at least two pins 76, the rotor core 21 and the insertion jig 7 can be aligned with high accuracy.

DESCRIPTION OF SYMBOLS 2... Rotor (rotary electric machine rotor) 211... Insertion hole 212... Flow hole 220... Rod-shaped body 3... Core plate 7... Insertion jig 76... Pin (engagement part) 761... Shaft part 761a... Peripheral surface 762... Flange part

Claims (5)

A plurality of core plates made of a soft magnetic material are stacked, a plurality of insertion holes extending in the stacking direction of the plurality of core plates, and a plurality of through holes different from the plurality of insertion holes extending in the stacking direction of the plurality of core plates a rotor core forming step of forming a rotor core provided with holes ;
an inserting step of inserting a rod -shaped body made of a hard magnetic material into each of the plurality of insertion holes of the rotor core while the rotor core is placed on a pallet ;
In the inserting step, an insertion jig provided with an engaging portion that engages with a plurality of guide holes and the through hole is used, and the insertion jig and the rotor core are relatively engaged by the engagement of the engaging portion. a step of aligning and inserting each of the plurality of rod-shaped bodies from the plurality of guide holes into the plurality of insertion holes ,
In the inserting step, a lifter having a plurality of support columns is used to lift the pallet vertically upward by contacting the tip surfaces of the support columns against the lower surface of the pallet. In a state in which the rotor core can move horizontally relative to the insertion jig by sliding the distal end surface of the insertion jig and the rotor core, the insertion jig and the rotor core are relatively engaged by the engagement of the engagement portion. align to
A manufacturing method of a rotary electric machine rotor. The engaging portion is composed of a plurality of pins having shaft portions inserted into the through holes ,
The through hole has a rectangular shape with rounded corners when viewed in the axial direction of the rotor core, and the shaft portions of the pair of pins are engaged with both ends of the through hole in the longitudinal direction,
The shaft portion has a tapered outer peripheral surface at the tip,
In the inserting step, the rotor core is aligned with the insertion jig by abutting the inner edge of the through hole against the tapered outer peripheral surface of the shaft portion.
A method for manufacturing a rotary electric machine rotor according to claim 1 . A plurality of core plates made of a soft magnetic material are stacked, and a plurality of insertion holes extending in the stacking direction of the plurality of core plates and a plurality of insertion holes different from the plurality of insertion holes extending in the stacking direction of the plurality of core plates and a plurality of rod-shaped bodies made of a hard magnetic material, wherein the plurality of rod-shaped bodies are inserted into the plurality of insertion holes, respectively,
an insertion jig having a main body portion in which a plurality of guide holes for temporarily holding the plurality of rod-shaped bodies are formed, and an engaging portion protruding downward from the main body portion;
When inserting the plurality of rod-shaped bodies into the plurality of insertion holes, the pallet on which the rotor core is placed is lifted vertically using a lifter having a plurality of support columns so that the lower surface of the pallet is positioned at the tip of the support column. With the rotor core horizontally movable relative to the insertion jig by sliding on the surface, the insertion jig and the rotor core are separated by the engagement of the engaging portion with the through hole. are relatively aligned,
Manufacturing equipment for rotary electric machine rotors. The engaging portion is composed of a plurality of pins having shaft portions inserted into the through holes ,
The through hole has a rectangular shape with rounded corners when viewed in the axial direction of the rotor core, and the shaft portions of the pair of pins are engaged with both ends of the through hole in the longitudinal direction,
The shaft portion has a tapered outer peripheral surface at the tip,
positioning the rotor core with respect to the insertion jig by bringing the tapered outer peripheral surface of the shaft portion into contact with the inner edge of the through hole ;
The apparatus for manufacturing a rotary electric machine rotor according to claim 3 . The insertion jig has a retaining member that is fixed to the main body and retains the pin,
The pin integrally has a flange portion having a larger diameter than the shaft portion and a base portion that fits into a fitting hole formed in the body portion , and the base portion fits into the fitting hole. is positioned with respect to the main body by
The retaining member is provided with a contact portion that abuts against the flange portion to retain the pin, and an insertion hole through which the shaft portion is inserted.
The apparatus for manufacturing a rotary electric machine rotor according to claim 4 .

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