JP2022108880A - Method for arranging assembly magnet to rotor core - Google Patents

Abstract

To reduce damage to an assembly magnet occurring due to a load applied to the assembly magnet.SOLUTION: For an assembly magnet guide having a magnet holding surface arranged to face a magnet assembly surface of a rotor core, on the opposite side of the magnet holding surface, a magnetic force generating jig generating a magnetic force to the assembly magnet arranged on the magnet holding surface is arranged. In a state where the magnetic force generating jig generates an attraction force for the assembly magnet arranged on the magnet holding surface, the assembly magnet is arranged on the magnet holding surface to hold the assembly magnet arranged on the magnet holding surface. For an assembly magnet guide in which the assembly magnet is held on the magnet holding surface, in a state where the rotor core is arranged such that the magnet assembly surface of the rotor core faces the magnet holding surface, the assembly magnet held on the magnet holding surface is moved to the magnet assembly surface in a state where the magnetic force generating jig generates a repulsive force to the assembly magnet held on the magnet holding surface.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a method of arranging assembled magnets on a rotor core.

In Patent Document 1, a guide plate projecting from one end of a slit formed along the axial direction of a rotor core and a pressing plate on the side opposite to the guide plate with respect to the assembly magnet are used to press the assembly magnet. A method is disclosed for arranging an assembly magnet in a slit by moving the assembly magnet into the slit by interlocking sandwiching, a guide plate and a pressing plate.

JP 2018-88760 A

However, in the case of the above method, when the assembly magnet is moved while maintaining the state in which the assembly magnet is sandwiched between the pressing plate and the guide plate, a load is applied to the assembly magnet due to the pinching force, and the assembly magnet is damaged. there is a possibility.

The present disclosure can be implemented as the following forms.

(1) According to one aspect of the present disclosure, there is provided a method of arranging assembly magnets on a rotor core. In this method of arranging the assembly magnets on the rotor core, an assembly magnet guide having a magnet holding surface arranged to face the magnet assembly surface of the rotor core is arranged on the side opposite to the magnet holding surface. arranging a magnetic force generating jig for generating a magnetic force with respect to the assembly magnet arranged on the magnet holding surface; a step of arranging an assembly magnet on the magnet holding surface and holding the assembly magnet arranged on the magnet holding surface in a state in which a is generated; A set in which the magnetic force generating jig is held by the magnet holding surface in a state in which the rotor core is arranged so that the magnet assembly surface of the rotor core faces the magnet holding surface with respect to the magnet guide. and moving the assembly magnet held on the magnet holding surface to the magnet assembly surface in a state in which a repulsive force is generated with respect to the attached magnet.
According to this method of arranging the assembly magnets on the rotor core, the assembly magnets are attached and held on the magnet holding surface by the attractive force generated by the magnetic force generating jig, and the assembly magnets are attached by the repulsive force generated by the magnetic force generating jig. It is possible to dispose the assembly magnets on the magnet assembly surface of the rotor core by moving the magnets to the magnet assembly surface. Therefore, it is possible to dispose the assembled magnets without applying a load generated by pinching to the assembled magnets as in the prior art. This makes it possible to reduce damage to the assembled magnet caused by the load applied to the assembled magnet.

The present disclosure can be realized in various forms such as a device for arranging an assembly magnet to the rotor core, as well as the method for arranging the assembly magnet to the rotor core in the above-described form.

FIG. 4 is an explanatory diagram showing an outline of a method of arranging assembly magnets on the rotor core of the first embodiment; Explanatory drawing which shows an example of the arrangement|positioning procedure of the assembly|attachment magnet to a rotor core. 1 is a perspective view showing a schematic configuration of an example of a base jig; FIG. FIG. 4 is a cross-sectional view schematically showing the IV-IV arrow cross section of FIG. 3; FIG. 4 is a perspective view showing a schematic configuration of an example of an assembled magnet guide arranged in a second arrangement area; The perspective view which shows a schematic structure of an example of the magnetic force generation jig arrange|positioned at a 3rd arrangement|positioning area|region. FIG. 7 is a cross-sectional view schematically showing a VII-VII cross section in FIG. 6; FIG. 4 is a plan view schematically showing a state in which an assembly magnet guide and a magnetic force generation jig are arranged on a base jig; FIG. 9 is a cross-sectional view schematically showing the IX-IX cross section of FIG. 8; FIG. 4 is a plan view schematically showing a state in which the rotor core is arranged on the outer peripheral side of the assembly magnet guide in the base jig; Explanatory drawing which expands and shows area|region Ae of FIG. FIG. 4 is a plan view schematically showing a state in which each assembly magnet is moved to each magnet assembly surface of the rotor core; Explanatory drawing which expands and shows area|region Ae of FIG. FIG. 11 is an explanatory diagram showing a state in which an assembly magnet is held by an assembly magnet guide by the magnetic force generating jig of the second embodiment; FIG. 9 is an explanatory view showing a state in which each assembly magnet is moved to each magnet assembly surface of the rotor core by the magnetic force generating jig of the second embodiment;

A. First embodiment:
FIG. 1 is an explanatory diagram showing an overview of a method of arranging assembly magnets on the rotor core of the first embodiment. The rotor core 10 to be assembled is an outer rotor, and a magnet assembly having a magnet assembly surface 13 extending in the axial direction along the central axis CX is provided on the inner peripheral surface 11 along the central axis CX of the rotor core 10. Attached portions 12 are set at regular intervals. Each magnet assembly surface 13 is a part to which the assembly magnet 20 is attached and assembled.

The assembly magnet 20 includes a permanent magnet whose magnetization direction is oriented in the radial direction when assembled on each magnet assembly surface 13. More specifically, the assembly magnet 20S (hereinafter referred to as an assembly magnet 20S) has an S pole on the inner peripheral side. "S pole assembly magnet 20S") and an assembly magnet 20N whose magnetic pole on the inner peripheral side is the N pole (hereinafter, "N pole assembly magnet 20N") are used.

S-pole assembly magnets 20S and N-pole assembly magnets 20N are alternately assembled on each magnet assembly surface 13 along the circumferential direction. In addition, below, the magnetic pole of the inner peripheral side of the assembly|attachment magnet 20 is demonstrated as "the magnetic pole of the assembly|attachment magnet 20."

An assembly magnet guide 130 is arranged on the inner peripheral side of the rotor core 10 . In the assembly magnet guide 130, groove-shaped magnet holding portions 132 extending in the axial direction along the central axis CX are set at regular intervals on the outer peripheral surface 131 along the central axis CX. The bottom surface of each magnet holding portion 132 is a magnet holding surface 133 facing each magnet assembly surface 13 . Each magnet holding surface 133 is a surface on which the assembly magnet 20 is attached and held by the attractive force of a magnetic force generating jig 140, which will be described later.

A magnetic force generating jig 140 corresponding to a magnetic force generating device is arranged on the inner peripheral side of the assembly magnet guide 130, that is, on the side opposite to the magnet holding surface 133. As shown in FIG. Magnetic force generating magnets 142 are provided in the magnetic force generating jig 140 at positions along the circumferential direction facing the magnet assembly surfaces 13 and the magnet holding surfaces 133 on the inner peripheral side of the assembly magnet guide 130 . is provided. Each of the magnetic force generating magnets 142 includes a permanent magnet whose magnetization direction is oriented in the radial direction when placed on the magnetic force generating jig 140, specifically, a magnetic force generating magnet 142S (hereinafter referred to as a magnetic force generating magnet 142S) having an S pole on the outer peripheral side. , “S pole magnets 142S”) and magnetic force generating magnets 142N whose magnetic poles on the outer peripheral side are N poles (hereinafter, “N pole magnets 142N”) are alternately used. In addition, below, the magnetic pole of the outer peripheral side of the magnet 142 for magnetic force generation is demonstrated as "the magnetic pole of the magnet 142 for magnetic force generation."

When holding the assembly magnet 20 on the magnet holding surface 133 of the assembly magnet guide 130, as shown in the upper part of FIG. The magnetic poles of the magnetic force generating magnets 142 arranged at 140 are opposite to the magnetic poles. That is, the N pole assembly magnet 20N is arranged on the magnet holding surface 133 facing the S pole magnet 142S, and the S pole assembly magnet 20S is arranged on the magnet holding surface 133 facing the N pole magnet 142N. When arranged in this manner, an attractive force acts on the assembly magnets 20 arranged on the respective magnet holding surfaces 133, and the assembly magnets 20 arranged on the respective magnet holding surfaces 133 are adhered to and held by the respective magnet holding surfaces 133. be able to. The assembly magnets 20 held by the magnet holding surfaces 133 are separated from the magnet assembly surface 13 of the rotor core 10 .

When the assembly magnet 20 is arranged and assembled on the magnet assembly surface 13 of the rotor core 10, as shown in the lower part of FIG. is rotationally moved by an amount corresponding to one magnet holding portion 132 (“one slot” or “one phase”) along the circumferential direction centered on . In addition, in the example of FIG. 1, it is rotated counterclockwise, but it may be rotated clockwise. When the magnetic force generating jig 140 is rotated in this manner, the magnetic poles of the opposing magnetic force generating magnets 142 and the magnetic poles of the assembly magnets 20 are in the same direction, so that each assembly magnet 20 is held. Due to the repulsive force directed toward the magnet mounting surface 13 facing the magnet holding surface 133, the magnet is moved to each magnet mounting surface 13 and pressed down. Thus, by fixing the assembly magnets 20 arranged on the magnet assembly surfaces 13 of the rotor core 10 with an adhesive, the assembly magnets 20 can be assembled on the magnet assembly surfaces 13 of the rotor core 10 . . Note that the adhesive may be applied in advance to the surface of each assembly magnet 20 facing the outer peripheral side when the assembly magnet 20 is arranged on each magnet holding surface 133 .

In the method of arranging the assembly magnet 20 on the rotor core 10 described above, the assembly magnet 20 is adhered and held on the magnet holding surface 133 by the attractive force generated by the magnetic force generation jig 140, and the magnetic force generation jig 140 is generated. The assembly magnet 20 can be moved to the magnet assembly surface 13 by the resulting repulsive force, and the assembly magnet 20 can be arranged on the magnet assembly surface 13 of the rotor core 10 . Therefore, the assembly magnets can be arranged on the rotor core without applying a load to the assembly magnets, as described in the prior art. It is possible to reduce damage to the magnet.

Specifically, the arrangement of the assembly magnets 20 on the rotor core 10 can be performed, for example, as follows. FIG. 2 is an explanatory diagram showing an example of a procedure for arranging the assembly magnets 20 on the rotor core 10. As shown in FIG.

First, in step S110, the assembly magnet guide 130 is arranged in a later-described arrangement area of the base jig 110, and in step S120, the magnetic force generating jig 140 is arranged in a later-described arrangement area on the inner peripheral side of the assembly magnet guide 130. Deploy.

FIG. 3 is a perspective view showing a schematic configuration of an example of the base jig 110, and FIG. 4 is a cross-sectional view schematically showing a cross section taken along line IV-IV in FIG. The base jig 110 includes a cylindrical shaft 111 centered on the central axis CX, a first groove portion 112 provided along the outer circumference of the cylindrical shaft 111 and having an annular shape when viewed from the axial direction, and a bottom surface of the first groove portion 112. and a second groove portion 113 having an annular shape when viewed from the axial direction. is. A nonmagnetic material such as resin, aluminum, or stainless steel is used for the base jig 110 .

The first groove portion 112 includes a first arrangement region 114 corresponding to the outer peripheral side portion of the outer peripheral side bottom surface 117 and a second arrangement up to a portion of the outermost peripheral side of the second groove portion 113 on the inner peripheral side of the first arrangement region 114 . It is divided into a region 115 and a third placement region 116 on the inner peripheral side of the second placement region 115 . The first arrangement area 114 is an area where the rotor core 10 is arranged, the second arrangement area 115 is an area where the assembly magnet guide 130 is arranged, and the third arrangement area 116 is an area where the magnetic force generating jig 140 is arranged. be.

In the first arrangement region 114 where the rotor core 10 is arranged, a guide groove 119 for positioning the rotor core 10 to be arranged is provided on the outer peripheral side surface of the first groove portion 112 . The number of guide grooves 119 is set according to the number of positioning protrusions provided on the outer peripheral surface of rotor core 10 .

FIG. 5 is a perspective view showing a schematic configuration of an example of the assembly magnet guide 130 arranged in the second arrangement area 115. As shown in FIG. The assembly magnet guide 130 has an annular shape when viewed from the axial direction, and groove-shaped magnet holding portions 132 extending in the axial direction are provided at regular intervals on the outer peripheral surface 131 . A magnet holding surface 133, which is the bottom surface of each magnet holding portion 132, is divided by ribs 134 arranged at regular intervals. As with the base jig 110, the assembly magnet guide 130 is made of a nonmagnetic material such as resin, aluminum, or stainless steel.

In order to correspond to the structure of the assembled magnet guide 130 shown in FIG. 5, as shown in FIGS. is provided with a guide groove 120 for inserting and positioning the rib 134 when arranging the assembly magnet guide 130 in the second arrangement area 115 .

FIG. 6 is a perspective view showing a schematic configuration of an example of the magnetic force generating jig 140 arranged in the third arrangement area 116 (see FIGS. 3 and 4), and FIG. FIG. 3 is a schematic cross-sectional view; The magnetic force generating jig 140 has a disc shape when viewed from the axial direction, and includes a rotating shaft 143 centered on the central axis CX, an annular portion 141 provided along the outer peripheral edge, and an annular portion 141 provided along the outer peripheral edge. and a plurality of magnetic force generating magnets 142 provided in the portion 141 . The parts of the magnetic force generating jig 140 other than the plurality of magnetic force generating magnets 142 are made of a non-magnetic material such as resin, aluminum, stainless steel, etc., similarly to the assembly magnet guide 130 .

1, S pole magnets 142S and N pole magnets 142N as magnetic force generating magnets 142 are alternately arranged at equal intervals. The number of magnetic force generating magnets 142 arranged in the annular portion 141 is the same as the number of assembly magnets 20 assembled to the rotor core 10 .

The distal end side of the rotating shaft 143 is a hexagonal portion 144 for applying torque to the rotating shaft 143 for rotating the magnetic force generating jig 140 . A shaft hole 145 into which the cylindrical shaft 111 of the base jig 110 is inserted is provided in the rotating shaft 143 and the hexagonal portion 144 . A pin hole 146 penetrating toward the central axis CX is provided in the side surface of the rotating shaft 143 , and a phasing pin 150 is inserted into the pin hole 146 . The phasing pin 150 is pulled toward the inside of the pin hole 146 by a spring 152 so that a curved (hemispherical in this example) tip 153 protrudes into the shaft hole 145 . The position of the pin hole 146 is such that when the tip portion 153 of the phasing pin 150 is inserted into the insertion hole 121 of the cylindrical shaft 111, as shown in FIG. It is set so as to face the assembly magnet 20 arranged in the position. For example, the position of the pin hole 146 is provided at a position facing the position between the S-pole magnet 142S and the N-pole magnet 142N of the annular portion 141 .

In order to correspond to the structure of the magnetic force generating jig 140 shown in FIGS. 6 and 7, as shown in FIGS. The insertion holes 121 of the portion 153 are provided at regular intervals along the circumferential direction. The number of insertion holes 121 is the same as the number of magnetic force generating magnets 142 and assembly magnets 20, and each insertion hole 121 is located at the same position along the circumferential direction as the position of each guide groove 120 along the circumferential direction. is provided.

Further, the inner peripheral side bottom surface 118 of the first groove portion 112 in the third arrangement area 116 is rotatable about the cylindrical axis 111 when the magnetic force generation jig 140 is arranged in the third arrangement area 116 . It becomes a support base for supporting the tool 140 .

The base jig 110 shown in FIGS. 3 and 4 is an example of a structure corresponding to the structures of the rotor core 10 to be mounted, the assembly magnet guide 130, and the magnetic force generation jig 140. It is not limited to the structure shown in FIG. It can be changed as appropriate according to the structures of the rotor core 10 to be mounted, the assembly magnet guide 130 and the magnetic force generating jig 140 .

FIG. 8 is a plan view schematically showing a state in which the assembly magnet guide 130 and the magnetic force generating jig 140 are arranged on the base jig 110, and FIG. 9 schematically shows a cross section taken along line IX-IX in FIG. It is a sectional view.

As shown in FIGS. 8 and 9, the assembled magnet guide 130 is arranged such that the ribs 134 (see FIG. 5) are inserted into the guide grooves 120 (see FIGS. 3 and 4), thereby forming a base jig. 110 are arranged in a state of being positioned in the second arrangement area 115 . It should be noted that the portion of the outer peripheral side bottom surface 117 sandwiched between the ribs 134 inserted into the guide grooves 120 in the state where the assembly magnet guide 130 is arranged in the second arrangement region 115 is formed by each magnet holding portion, as will be described later. It becomes a support surface for supporting the assembly magnet 20 when the assembly magnet 20 is arranged on the magnet holding surface 133 of 132 .

Further, as shown in FIG. 8, the magnetic force generating jig 140 has the cylindrical shaft 111 of the base jig 110 inserted into the shaft hole 145 and is supported by the inner peripheral bottom surface 118 of the first groove portion 112 of the base jig 110 . are placed so that At this time, the position of the pin hole 146 of the phasing pin 150 of the magnetic force generating jig 140 and the position of the insertion hole 121 of the cylindrical shaft 111 are arranged in a straight line. As a result, the distal end portion 153 of the phase determining pin 150 is inserted into the insertion hole 121 by the elastic force of the spring 152 , and the magnetic force generating jig 140 is positioned and arranged in the second arrangement area 115 . In the example of FIG. 8, the position of the guide groove 119 for the rotor core 10, the position of the guide groove 120 into which the rib 134 of the assembly magnet guide 130 is inserted, and the pin hole of the phasing pin 150 of the magnetic force generating jig 140 are shown. The position of 146 and the position of the insertion hole 121 of the cylindrical shaft 111 are positioned so as to be aligned in a straight line. As a result, the magnetic force generating magnets 142 (S pole magnet 142S and N pole magnet 142N) of the magnetic force generating jig 140 are arranged so as to face the magnet holding surfaces 133 of the assembly magnet guide 130 .

Each magnet holding surface 133 is in a state in which the magnetic poles of the magnetic force generating magnets 142 facing each other are opposite to the magnetic poles of the assembled magnets 20 to be arranged, and an attractive force is generated in each assembled magnet 20 . ing. Specifically, the magnet holding surface 133 at a position facing the S pole magnet 142S is in a state of generating an attractive force with respect to the N pole assembly magnet 20N to be arranged, and is facing the N pole magnet 142N. The magnet holding surface 133 at the position where it is located is in a state of generating an attractive force with respect to the S pole assembly magnet 20S to be arranged. The arrangement positions of the S pole magnets 142S and the N pole magnets 142N are set according to the positions at which the S pole assembly magnets 20S and the N pole assembly magnets 20N are assembled to the rotor core 10. FIG.

Next, in step S130 of FIG. 2, each assembly magnet 20 is arranged on the magnet holding surface 133 of each magnet holding portion 132, and in step S140, the rotor is placed in the first arrangement region 114 on the outer peripheral side of the assembly magnet guide 130. A core 10 is placed.

FIG. 10 is a plan view schematically showing a state in which the rotor core 10 is arranged on the outer peripheral side of the assembly magnet guide 130 in the base jig 110. As shown in FIG. FIG. 11 is an explanatory diagram showing an enlarged area Ae in FIG.

The assembly magnets 20 are arranged on the magnet holding surface 133 of each magnet holding portion 132 as follows. That is, as shown in FIG. 10, the N-pole assembly magnet 20N is arranged on the magnet holding surface 133 of the magnet holding portion 132 at the position facing the S-pole magnet 142S, and the magnet-holding surface at the position facing the N-pole magnet 142N. The magnet holding surface 133 of the portion 132 is provided with the S pole assembly magnet 20S. By arranging in this manner, as shown in FIG. 11, each assembly magnet 20 is positioned on the outer peripheral side bottom surface 117 (FIGS. 8 and 8) of the first groove portion 112 as shown in FIG. 9), and adhered to and held by the magnet holding surfaces 133 by the attractive force of the opposing magnetic force generating magnets 142 (see the upper part of FIG. 1).

It should be noted that the assembly magnets 20 held on the respective magnet holding surfaces 133 are attached to the rotor core 10 on the surface facing the rotor core 10 before the rotor core 10 is arranged on the base jig 110 in step S140. An adhesive is applied for attaching the attached magnet 20 . The application of the adhesive may be performed sequentially before arranging the assembly magnet 20 on the magnet holding surface 133 .

As shown in FIG. 10, the rotor core 10 is arranged such that the positioning projections 16 provided on the outer peripheral surface 15 of the rotor core 10 are inserted into the guide grooves 119 (see FIGS. 3 and 4), thereby forming a base. It is arranged in a state of being positioned in the first arrangement area 114 of the jig 110 . As a result, the magnet assembly surfaces 13 of the magnet assembly portions 12 arranged at equal intervals on the inner peripheral surface 11 of the rotor core 10 face the magnet holding surfaces 133 of the magnet holding portions 132 of the assembly magnet guide 130. are arranged to A magnetic material such as iron is used for the rotor core 10 .

It should be noted that the rotor core 10 shown in FIG. 10 shows an example of a configuration having ribs 14 that divide the magnet assembly surfaces 13 of the magnet assembly portions 12 . The ribs 134 that separate the magnet holding surfaces 133 of the assembly magnet guide 130 are provided at positions facing the ribs 14 that separate the magnet assembly surfaces 13 . Thereby, each rib 14 not only functions to separate the assembly magnets 20 assembled on the magnet assembly surface 13 of each magnet assembly portion 12 from each other, but also separates the assembly magnets 20 from each magnet assembly as will be described later. It also functions as a guide when assembled on the magnet assembly surface 13 of the portion 12 .

Next, in step S150 in FIG. 2, the assembly magnets 20 held by the magnet holding surfaces 133 are moved to the magnet assembly surfaces 13 facing each other. This is because the magnetic poles of the magnetic force generating magnets 142 facing each magnet holding surface 133 are made to have the same magnetic poles as the magnetic poles of the assembled magnets 20 held on each magnet holding surface 133, and a repulsive force is generated in each assembled magnet 20. It is executed by setting the state to

12 is a plan view schematically showing a state in which each assembly magnet 20 is moved to each magnet assembly surface 13 of the rotor core 10. FIG. FIG. 13 is an explanatory diagram showing an enlarged area Ae in FIG.

As shown in FIG. 12, the magnetic force generating jig 140 generates a repulsive force on each assembled magnet 20, which generates an attractive force that holds the assembled magnet 20 on each magnet holding surface 133 facing each magnetic force generating magnet 142. This is executed by changing the state (see FIGS. 12 and 13) to a state in which each magnetic force generating magnet 142 generates a repulsive force. Specifically, the generation of the repulsive force on each assembly magnet 20 by the magnetic force generating jig 140 is similar to that described using the lower part of FIG. This is performed by rotating the position by one slot (one phase) corresponding to one magnet holding portion 132 along the circumferential direction about the central axis CX. This rotational movement is accomplished by manually applying torque to the hex 144 using, for example, a wrench. At this time, it is preferable that the insertion hole 121 into which the tip portion 153 of the phase determining pin 150 is inserted has a groove structure shallower than the curved surface of the tip portion 153 . In this way, the tip 153 of the phasing pin 150 is automatically pulled out from the insertion hole 121 by the torque applied for rotation, and the magnetic force generating jig 140 starts rotating. Then, when the tip portion 153 of the phase determining pin 150 reaches the insertion hole 121 at the position corresponding to one phase, it is inserted into the insertion hole 121 so that each magnetic force generating jig 140 is inserted. The magnet 142 can be positioned and fixed in a state in which a repulsive force is generated.

As described above, by generating a repulsive force on each assembled magnet 20 by the magnetic force generating jig 140, each magnet holding portion can be generated as shown in FIG. The assembly magnets 20 held on the magnet holding surfaces 133 of the rotor core 10 are moved to the magnet assembly surfaces 13 of the magnet assembly portions 12 of the rotor core 10, and attached to the magnet assembly surfaces 13. be able to. As a result, each assembly magnet 20 can be attached and fixed to each magnet assembly surface 13 by the applied adhesive, and each magnet assembly surface 13 of each magnet assembly portion 12 of the rotor core 10 can be attached to each magnet assembly surface 13 . An assembly magnet 20 can be assembled.

In the method of arranging the assembly magnets 20 on the rotor core 10 using the base jig 110, the assembly magnet guide 130, and the magnetic force generation jig 140 described above, as described with reference to FIG. The assembly magnets can be arranged on the rotor core without applying a load to the magnets, and damage to the assembly magnets caused by the load applied to the assembly magnets can be reduced.

In the above embodiment, the same number of insertion holes 121 as the magnetic force generating magnets 142 and the assembly magnets 20 are provided at the same circumferential positions as the guide grooves 120 along the circumferential direction. ing. Further, the position of the pin hole 146 of the phase determining pin 150 is provided along the same circumferential direction as the position between the S-pole magnet 142S and the N-pole magnet 142N of the annular portion 141 . The positions of these holes are the magnet assembly portion 12 having the magnet assembly surface 13 of the rotor core 10 , the magnet holding portion 132 having the magnet holding surface 133 of the assembly magnet guide 130 , and the magnetic force of the magnetic force generating jig 140 . It is sufficient that the generating magnets 142 are arranged side by side along the radial direction about the central axis CX.

Also, the number of insertion holes 121 may not be the same as the number of magnetic force generating magnets 142 and assembly magnets 20 . For example, there may be two insertion holes 121 for holding the assembly magnet 20 by attraction and insertion holes 121 for moving and assembling the assembly magnet 20 by repulsion.

B. Second embodiment:
In the first embodiment, by rotationally moving the position of each magnetic force generating magnet 142 of the magnetic force generating jig 140, the attractive force is applied to each assembly magnet 20 arranged on the magnet holding surface 133 of each magnet holding portion 132. is generated (steps S120 and S130 in FIG. 2) to a state in which a repulsive force is generated for each assembly magnet 20 (step S150 in FIG. 2). However, a magnetic force generating jig having a configuration described below may be used.

FIG. 14 is an explanatory view showing a state in which the assembly magnet 20 is held by the assembly magnet guide 130 by the magnetic force generating jig 160 of the second embodiment. FIG. 15 is an explanatory diagram showing a state in which each assembly magnet 20 is moved to each magnet assembly surface of the rotor core 10 by the magnetic force generating jig 160 of the second embodiment. 14 and 15 omit the base jig on which the rotor core 10, the assembly magnet guide 130, and the magnetic force generation jig 160 are placed, for the sake of ease of explanation. Also, the base jig used in the second embodiment can be appropriately changed in accordance with the structures of the rotor core to be placed, the assembly magnet guide, and the magnetic force generation jig.

As shown in FIGS. 14 and 15, the magnetic force generating jig 160 of the second embodiment arranged on the inner peripheral side of the assembly magnet guide 130 includes a plurality of magnetic force generating magnets 142 (FIGS. 1 and 1) made of permanent magnets. 8), a plurality of electromagnets 162 are used as a plurality of magnetic force generating magnets. Each electromagnet 162 is a magnet that changes the generated magnetic pole by changing the current flowing in the coil that constitutes the electromagnet according to the direction of the applied voltage.

As shown in FIG. 14, when the magnet holding surfaces 133 of the magnet holding portions 132 of the assembly magnet guide 130 hold the assembly magnets 20 (see steps S120 and S130 in FIG. 2), each electromagnet 162 The magnetic pole of the assembly magnet 20 is opposite to the magnetic pole of the assembled magnet 20 to generate an attractive force. 15, when the assembly magnets 20 held by the magnet holding surfaces 133 are moved to the magnet assembly surfaces of the rotor core 10 (see step S150 in FIG. 2), each electromagnet 162 is made to have the same magnetic pole as the magnetic pole of the assembly magnet 20 held, and a repulsive force is generated.

As described above, when the magnetic force generating jig 160 is used, by switching the direction of the voltage applied to each electromagnet 162, the magnetic pole of each electromagnet 162 is switched, and the attractive force and the repulsive force applied to each assembly magnet 20 are changed. Switching can be done.

In the second embodiment, similarly to the first embodiment, the assembly magnets can be arranged on the rotor core without applying a load to the assembly magnets. It is possible to reduce damage to the assembled magnets.

C. Other embodiments:
(C1) In the first embodiment, the magnetic force generating jig 140 is rotated by applying torque to the hexagonal portion 144 using a wrench. However, the magnetic force generating jig 140 may be rotated using various manual rotating mechanisms such as a worm gear instead of the wrench. Moreover, the magnetic force generating jig 140 may be automatically rotated using various automatic rotation mechanisms such as a rotation mechanism including a motor.

(C2) In the above embodiment, the rotor core to which the assembly magnets are assembled is described as an example of the outer rotor in which the assembly magnets are assembled on the inner peripheral side. is also applicable. However, in the case of an inner rotor, an assembly magnet guide is arranged on the outer peripheral side of the rotor core, a magnet holding portion having a magnet holding surface is provided on the inner peripheral surface of the assembly magnet guide, and the outer circumference of the assembly magnet guide is provided. The magnetic force generating magnets of the magnetic force generating jig are arranged along the circumferential direction on the side.

The present disclosure is not limited to the embodiments described above, and can be implemented in various configurations without departing from the scope of the present disclosure. For example, the technical features of the embodiments corresponding to the technical features in each form described in the outline of the invention are used to solve some or all of the above problems, or Alternatively, replacements and combinations can be made as appropriate to achieve all. Also, if the technical features are not described as essential in this specification, they can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10... Rotor core, 11... Inner peripheral surface, 12... Magnet assembly part, 13... Magnet assembly surface (bottom surface of magnet assembly part), 14... Rib, 15... Outer peripheral surface, 16... Positioning protrusion, 20... Assembly Attached magnet 20N...N pole assembly magnet 20S...S pole assembly magnet 110...Base jig 111...Cylinder shaft 112...First groove 113...Second groove 114...First arrangement area 115 2nd arrangement area 116 3rd arrangement area 117 outer peripheral bottom surface 118 inner peripheral bottom surface 119 guide groove 120 guide groove 121 insertion hole 130 assembly magnet guide 131 Outer peripheral surface 132 Magnet holding portion 133 Magnet holding surface (bottom surface of magnet holding portion) 134 Rib 140 Magnetic force generating jig 141 Annular portion 142 Magnetic force generating magnet 142 N N pole magnet for generating magnetic force (N-pole magnet), 142S... magnet for generating S-pole magnetic force (S-pole magnet), 143... rotating shaft, 144... hexagonal portion, 145... shaft hole, 146... pin hole, 150... phasing Pin 152 Spring 153 Tip 160 Magnetic force generation jig 162 Electromagnet (magnetic force generation magnet) CX Central axis

Claims (1)

A method of arranging an assembly magnet on a rotor core,
With respect to the assembly magnet guide having the magnet holding surface arranged so as to face the magnet assembly surface of the rotor core, the assembly magnet arranged on the magnet holding surface on the side opposite to the magnet holding surface. A step of arranging a magnetic force generating jig that generates a magnetic force against the
The assembly magnet is arranged on the magnet holding surface in a state in which the magnetic force generating jig generates an attractive force with respect to the assembly magnet arranged on the magnet holding surface, and the assembly magnet is arranged on the magnet holding surface. holding the magnet;
In a state where the rotor core is arranged such that the magnet assembly surface of the rotor core faces the magnet holding surface with respect to the assembly magnet guide in which the assembly magnet is held on the magnet holding surface, the a step of moving the assembly magnet held on the magnet holding surface to the magnet assembly surface in a state where the magnetic force generating jig generates a repulsive force with respect to the assembly magnet held on the magnet holding surface;
A method of arranging an assembly magnet, comprising:

Images