JP2013169073A - Rotor and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor enabling reduction of gaps between rotor cores and a field magnet while ensuring adhesion therebetween.SOLUTION: A magnet fixing surface 21g of a first core base 21a and a magnet fixing surface 22g of a second core base 22a are attached to a first axial end face 23a of an annular magnet 23 and a second axial end face 23b of the annular magnet 23, respectively, by means of adhesives 33. The magnet fixing surface 21g of the first core base 21a has first slits 31 (first adhesive recesses) axially recessed and filled with the adhesives 33, and the magnet fixing surface 22g of the second core base 22a has second slits 32 (second adhesive recesses) axially recessed and filled with the adhesives 33.

Description

  The present invention relates to a rotor and a motor.

  The rotor used in the motor has a pair of rotor cores that are combined with each other having a plurality of claw-shaped magnetic poles in the circumferential direction, and each claw-shaped magnetic pole is alternately different by arranging a field magnet between them. There is a so-called Landel-type rotor that functions as a magnetic pole (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 5-43749

  By the way, in the rotor of the Landell type structure as described above, the pair of rotor cores and the field magnet interposed therebetween are respectively bonded and fixed by an adhesive. For this reason, the adhesive layer (adhesive layer) provides a magnetic resistance between the rotor core and the field magnet. The thicker the adhesive layer, the greater the magnetic resistance between the rotor core and the field magnet, leading to a reduction in motor performance. In order to avoid this, if the adhesive layer is thinned to reduce the gap (interval) between the rotor core and the field magnet, it becomes difficult to obtain a desired adhesive force.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotor and a motor capable of reducing the gap between them while ensuring the adhesive force between the rotor core and the field magnet. It is to provide.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a plurality of first claw-shaped magnetic poles are projected radially outward at equal intervals on the outer periphery of the substantially disk-shaped first core base. A plurality of second claw-shaped magnetic poles protrude outward in the radial direction and extend in the axial direction at equal intervals on the outer periphery of the first rotor core extending in the direction and the substantially disk-shaped second core base. A second rotor core disposed between the first claw-shaped magnetic poles of the first rotor core to which each of the second claw-shaped magnetic poles corresponds, and between the first core base and the second core base in the axial direction. And a field magnet that is magnetized in the axial direction so that the first claw-shaped magnetic pole functions as a first magnetic pole and the second claw-shaped magnetic pole functions as a second magnetic pole, A first axial end surface of the first core base and the field magnet, and the second core; And a second axial end surface of the field magnet are bonded to each other by an adhesive, and the first core base magnet fixing surface and the first axial end surface of the field magnet. At least one of the first core and the second core base is provided with a first adhesive recess that is recessed in the axial direction and into which the adhesive material enters, and is provided on at least one of the magnet fixing surface of the second core base and the second axial end surface of the field magnet. Is characterized by being provided with a second adhesive recess recessed in the axial direction and containing the adhesive.

  In the present invention, the first and second core bases and the field magnet are bonded by the adhesive material that has entered the first and second bonding recesses. As a result, the adhesive layer formed at a location other than the first and second adhesive recesses between the first and second core bases and the axial end surface of the field magnet can be made as thin as possible or omitted. For this reason, it is possible to reduce the gap between the rotor core and the field magnet while securing the adhesive force. As a result, an increase in magnetic resistance between the rotor core and the field magnet can be suppressed, and a decrease in motor performance can be suppressed.

  According to a second aspect of the present invention, in the rotor according to the first aspect, the first adhesive recess is provided correspondingly between the first claw-shaped magnetic poles in the circumferential direction, and the second adhesive recess is It is provided correspondingly between the second claw-shaped magnetic poles in the circumferential direction.

  In the present invention, in the first and second core bases, the portion that becomes the magnetic path from the field magnet to the first and second claw-shaped magnetic poles (the inner peripheral side portion of the first and second claw-shaped magnetic poles) is avoided. First and second adhesive recesses are provided. That is, since the first and second adhesive recesses are provided corresponding to the portions of the first and second core bases with a small amount of magnetic flux, magnetic loss due to the first and second adhesive recesses can be suppressed.

According to a third aspect of the present invention, in the rotor according to the first or second aspect, the first and second adhesive recesses have a groove shape extending from the inner peripheral side to the outer peripheral side.
In the present invention, the first and second core bases and the field magnet can be bonded in a balanced manner in the radial direction. Further, when the configuration in which the first and second adhesive recesses are provided between the first and second claw-shaped magnetic poles, respectively, and the configuration of the present invention are combined, the magnetic flux of the field magnet is supplied to each first claw-shaped magnetic pole and each The second claw-shaped magnetic poles can be efficiently distributed, and as a result, the motor performance can be improved.

According to a fourth aspect of the present invention, in the rotor according to any one of the first to third aspects, the first and second adhesive recesses are provided at equal intervals in the circumferential direction. .
In the present invention, the first and second core bases and the field magnet can be bonded in a balanced manner in the radial direction. Further, if the first and second adhesive recesses are formed in a groove shape extending from the inner peripheral side to the outer peripheral side, and the configuration provided between the first and second claw-shaped magnetic poles is combined with the configuration of the present invention, the field is obtained. The magnetic flux of the magnet can be efficiently distributed by each first claw-shaped magnetic pole and each second claw-shaped magnetic pole, and as a result, the motor performance can be further improved.

A fifth aspect of the present invention is a motor comprising the rotor according to any one of the first to fourth aspects.
In the present invention, it is possible to secure the adhesive force between the rotor core and the field magnet while improving the motor performance by reducing the gap between the rotor core and the field magnet.

  Therefore, according to the above described invention, it is possible to reduce the gap between the rotor core and the field magnet while ensuring the adhesive force. As a result, an increase in magnetic resistance can be suppressed and a desired motor output can be obtained.

Sectional drawing of a motor. The top view of a motor. The perspective view of a rotor. Sectional drawing of a rotor. Sectional drawing which shows typically the adhesion part of the 1st and 2nd core base and an annular magnet. The perspective view of a rotor core. (A) (b) (c) The perspective view of the rotor core of another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a motor case 2 of a motor 1 includes a cylindrical housing 3 formed in a bottomed cylindrical shape, and an opening on the front side (left side in FIG. 1) of the cylindrical housing 3. And a front end plate 4 for closing. A circuit housing box 5 that houses a power supply circuit such as a circuit board is attached to an end of the cylindrical housing 3 on the rear side (right side in FIG. 1). A stator 6 is fixed to the inner peripheral surface of the cylindrical housing 3. The stator 6 includes an armature core 7 having a plurality of teeth extending radially inward, and a segment conductor (SC) winding 8 wound around the teeth of the armature core 7. The rotor 11 of the motor 1 has a rotating shaft 12 and is disposed inside the stator 6. The rotating shaft 12 is a non-magnetic metal shaft, and is rotatably supported by bearings 13 and 14 supported by the bottom 3 a of the cylindrical housing 3 and the front end plate 4.

  3 and 4, the rotor 11 includes first and second rotor cores 21 and 22, an annular magnet 23 (see FIG. 4) as a field member, first and second back auxiliary magnets 24, 25 and interpolar magnets 26 and 27. 3 and 4 indicate the magnetization directions (from the S pole to the N pole) of the magnets 23, 24, 25, 26, and 27.

  As shown in FIGS. 3, 4, and 6, the first rotor core 21 has a plurality of (five in the present embodiment) first claw-like shapes on the outer peripheral portion of the substantially disk-shaped first core base 21 a. The magnetic pole 21b protrudes radially outward and extends in the axial direction. The circumferential end surfaces 21c and 21d of the first claw-shaped magnetic pole 21b are flat surfaces extending in the radial direction (not inclined with respect to the radial direction when viewed from the axial direction), and the first claw-shaped magnetic pole 21b has a cross section perpendicular to the axis. Has a fan shape. The circumferential angle of each first claw-shaped magnetic pole 21b, that is, the angle between the circumferential end faces 21c and 21d is set smaller than the angle of the gap between the first claw-shaped magnetic poles 21b adjacent in the circumferential direction.

  The second rotor core 22 has the same shape as the first rotor core 21, and a plurality of second claw-shaped magnetic poles 22b are projected radially outwardly at equal intervals on the outer periphery of the substantially disk-shaped second core base 22a. At the same time, it extends in the axial direction. The circumferential end surfaces 22c and 22d of the second claw-shaped magnetic pole 22b are flat surfaces extending in the radial direction, and the second claw-shaped magnetic pole 22b has a fan-shaped cross section in the direction perpendicular to the axis. The circumferential angle of each second claw-shaped magnetic pole 22b, that is, the angle between the circumferential end faces 22c and 22d is set smaller than the angle of the gap between the second claw-shaped magnetic poles 22b adjacent in the circumferential direction. The second rotor core 22 is arranged between the first core base 21a and the second core base 22a such that the second claw-shaped magnetic poles 22b are disposed between the corresponding first claw-shaped magnetic poles 21b. The annular magnet 23 (see FIG. 4) is arranged (clamped) between the directions, and is assembled to the first rotor core 21. At this time, since one circumferential end face 21c of the first claw-shaped magnetic pole 21b and the other circumferential end face 22d of the second claw-shaped magnetic pole 22b are formed in parallel along the axial direction, each end face 21c is formed. , 22d is formed so as to be substantially linear along the axial direction. Further, since the other circumferential end face 21d of the first claw-shaped magnetic pole 21b and one circumferential end face 22c of the second claw-shaped magnetic pole 22b are formed so as to be parallel along the axial direction, each end face 21d, The gap between 22c is formed so as to be substantially linear along the axial direction.

  As shown in FIG. 4, the outer diameter of the annular magnet 23 is set to be the same as the outer diameters of the first and second core bases 21a and 22a, and the first claw-shaped magnetic pole 21b is used as the first magnetic pole (this embodiment). The second claw-shaped magnetic pole 22b is magnetized in the axial direction so as to function as a second magnetic pole (S pole in the present embodiment). Therefore, the rotor 11 of the present embodiment is a so-called Landel type rotor using the annular magnet 23 as a field magnet. In the rotor 11, first claw-shaped magnetic poles 21b that are N poles and second claw-shaped magnetic poles 22b that are S poles are alternately arranged in the circumferential direction, and the number of magnetic poles is 10 poles (the number of pole pairs is 5). It becomes. Here, since the number of pole pairs is an odd number of 3 or more, the claw-like magnetic poles having the same polarity do not face each other at 180 ° in the circumferential direction when viewed in the rotor core unit, so that the shape is stable against magnetic vibration.

  A first back auxiliary magnet 24 is arranged between the back surface 21e (radially inner surface) of each first claw-shaped magnetic pole 21b and the outer peripheral surface 22f of the second core base 22a. The first back auxiliary magnet 24 has a fan-shaped cross section in the axis-perpendicular direction, and the second core base has an N pole that is in contact with the back surface 21e of the first claw-shaped magnetic pole 21b and has the same polarity as the first claw-shaped magnetic pole 21b. Magnetization is performed so that the side of 22a that comes into contact with the outer peripheral surface 22f becomes the S pole having the same polarity as the second core base 22a.

  Similarly to the first claw-shaped magnetic pole 21b, a second back auxiliary magnet 25 is disposed on the back surface 22e of each second claw-shaped magnetic pole 22b. As the 1st back auxiliary magnet 24 and the 2nd back auxiliary magnet 25, a ferrite magnet can be used, for example. The second back auxiliary magnet 25 has a fan-shaped cross section in the direction perpendicular to the axis, and is magnetized so that the side in contact with the back surface 22e is an S pole and the side in contact with the outer peripheral surface 21f of the first core base 21a is an N pole. ing.

  The first back auxiliary magnet 24 and the second back auxiliary magnet 25 are arranged so as to overlap each other in the axial direction at the axial position of the rotor 11 where the annular magnet 23 is arranged. The axial length is set so as to be arranged until reaching the arranged axial position.

  As shown in FIG. 3, interpolar magnets 26 and 27 are disposed between the circumferential directions of the first claw-shaped magnetic pole 21b and the second claw-shaped magnetic pole 22b. Specifically, the first interpole magnet 26 includes a flat surface formed by one circumferential end surface 21c of the first claw-shaped magnetic pole 21b and a circumferential end surface of the first back auxiliary magnet 24, and a second claw-shaped magnet. It is fitted and fixed between the other circumferential end face 22d of the magnetic pole 22b and a flat face formed by the circumferential end face of the second back auxiliary magnet 25.

  The second interpole magnet 27 has the same shape as the first interpole magnet 26, and is formed by the other circumferential end surface 21 d of the first claw-shaped magnetic pole 21 b and the circumferential end surface of the first back auxiliary magnet 24. And a flat surface formed by one circumferential end surface 22c of the second claw-shaped magnetic pole 22b and a circumferential end surface of the second back auxiliary magnet 25. The first and second interpole magnets 26 and 27 are opposite in polarity to the first and second claw-shaped magnetic poles 21b and 22b (the first claw-shaped magnetic pole 21b side is N-pole and the second claw-shaped It is magnetized in the circumferential direction (so that the magnetic pole 22b side becomes the S pole).

  In the rotor 11, as shown in FIGS. 4, 5, and 6, on the inner side in the axial direction of the first core base 21 a of the first rotor core 21 and on the inner side in the axial direction of the second core base 22 a of the second rotor core 22. Are formed with a first slit 31 (first adhesive recess) and a second slit 32 (second adhesive recess), respectively. Since the first rotor core 21 and the second rotor core 22 have the same shape, the second slit 32 of the second rotor core 22 will be described in detail below, and the first slit 31 of the first rotor core 21 will be described in detail. Is omitted.

  Five second slits 32 corresponding to the number of second claw-shaped magnetic poles 22b are formed on the magnet fixing surface 22g (the axially inner end surface) of the second core base 22a (see FIG. 6). Each second slit 32 is a groove having a V-shaped cross section, and is formed linearly along the radial direction from the inner peripheral side end to the outer peripheral side end of the magnet fixing surface 22g. The second slits 32 are provided between the second claw-shaped magnetic poles 22b in the circumferential direction. That is, one second slit 32 is provided between each second claw-shaped magnetic pole 22b adjacent in the circumferential direction on the magnet fixing surface 22g. The second slits 32 are formed at equal intervals in the circumferential direction, and are formed at the circumferential center position between adjacent second claw-shaped magnetic poles 22b. The first slit 31 formed in the magnet fixing surface 21g of the first core base 21a has the same configuration as the second slit 32.

  As shown in FIG. 5, the first and second core bases 21 a and 22 a and the annular magnet 23 are bonded by an adhesive 33. Specifically, the magnet fixing surface 21g of the first core base 21a and the first axial end surface 23a of the annular magnet 23 are bonded, and the magnet fixing surface 22g of the second core base 22a and the second axial direction of the annular magnet 23 are bonded. The end surface 23b is bonded. The adhesive 33 enters each first slit 31 and each second slit 32. In addition, the adhesive 33 is thinly spread between the annular magnet 23 and a portion other than the first and second slits 31 and 32 on the magnet fixing surfaces 21g and 22g of the first and second core bases 21a and 22a. An adhesive layer L is formed. Thus, in this embodiment, since the 1st and 2nd slits 31 and 32 into which the adhesive material 33 enters are provided in the magnet fixing surfaces 21g and 22g, the contact between the magnet fixing surfaces 21g and 22g and the adhesive material 33 is provided. An area can be gained, and as a result, it is possible to ensure the adhesive force between the first and second core bases 21a, 22a and the annular magnet 23.

  When the three-phase drive current is supplied to the segment conductor (SC) winding 8 via the power supply circuit in the circuit housing box 5, the motor 1 configured as described above rotates the rotor 11 with the stator 6. Is generated, and the rotor 11 is rotationally driven.

Next, the operation of the motor 1 configured as described above will be described.
In the rotor 11 of the motor 1 of the present embodiment, first and second slits 31 and 32 into which the adhesive 33 enters are formed on the magnet fixing surfaces 21g and 22g of the first and second core bases 21a and 22a, respectively. Yes. Thereby, the adhesive force between the magnet fixing surfaces 21g, 22g and the annular magnet 23 is ensured in the first and second slits 31, 32 that are recessed to increase the contact area with the adhesive 33. For this reason, it is possible to make the adhesive layer L between the portions other than the first and second slits 31 and 32 on the magnet fixing surfaces 21g and 22g and the annular magnet 23 as thin as possible. And the gap (interval) between the 2nd core bases 21a and 22a and the annular magnet 23 can be made small.

  The first slit 31 is provided between the first claw-shaped magnetic poles 21b, and the second slit 32 is provided between the second claw-shaped magnetic poles 22b. Here, in the first and second core bases 21a and 22a, the inner peripheral portions of the first and second claw-shaped magnetic poles 21b and 22b are magnetized from the annular magnet 23 to the first and second claw-shaped magnetic poles 21b and 22b. In this embodiment, the first and second slits 31 and 32 are provided so as to avoid this part. That is, the 1st and 2nd slits 31 and 32 are provided in the site | part with little amount of the magnetic flux which passes in the 1st and 2nd core bases 21a and 22a. For this reason, the magnetic loss which may arise by providing the 1st and 2nd slits 31 and 32 in the magnet fixing surfaces 21g and 22g is suppressed small. In the present embodiment, in addition to the configuration in which the first and second slits 31 and 32 are provided between the first and second claw-shaped magnetic poles 21b and 22b, the first and second slits 31 and 32 are arranged on the outer circumference from the inner circumference side. Since the groove shape extends to the side, the magnetic flux of the annular magnet 23 is efficiently distributed to the first claw-shaped magnetic poles 21b and the second claw-shaped magnetic poles 22b, and as a result, the motor performance is improved. Yes.

Next, characteristic effects of the present embodiment will be described.
(1) The magnet fixing surface 21g of the first core base 21a is provided with a first slit 31 (first adhesive recess) into which the concave adhesive material 33 enters in the axial direction, and the magnet fixing surface 22g of the second core base 22a. Is provided with a second slit 32 (second adhesive recess) into which the concave adhesive material 33 enters in the axial direction. For this reason, the first and second core bases 21 a and 22 a and the annular magnet 23 are bonded together by the adhesive 33 that has entered the first and second slits 31 and 32. As a result, the adhesive layer L formed at a location other than the first and second slits 31 and 32 between the first and second core bases 21a and 22a and the axial end faces 23a and 23b of the annular magnet 23 is made as thin as possible. Therefore, it is possible to reduce the gap between the first and second rotor cores 21 and 22 and the annular magnet 23 while securing the adhesive force. As a result, an increase in magnetic resistance between the first and second rotor cores 21 and 22 and the annular magnet 23 can be suppressed, and a decrease in motor performance can be suppressed.

  (2) The first slits 31 are provided between the first claw-shaped magnetic poles 21b, and the second slits 32 are provided between the second claw-shaped magnetic poles 22b. As a result, in the first and second core bases 21a and 22a, the portions (the inside of the first and second claw-shaped magnetic poles 21b and 22b) that become magnetic paths from the annular magnet 23 to the first and second claw-shaped magnetic poles 21b and 22b. The first and second slits 31 and 32 are provided so as to avoid the peripheral portion. That is, since the first and second slits 31 and 32 are provided corresponding to the portions where the amount of magnetic flux in the first and second core bases 21a and 22a is small, the magnetic loss due to the first and second slits 31 and 32 is reduced. Can be suppressed.

  (3) The first and second slits 31 and 32 have a groove shape extending from the inner peripheral side to the outer peripheral side. Thereby, it becomes possible to adhere | attach the 1st and 2nd core base 21a, 22a and the annular magnet 23 with sufficient balance in radial direction. Further, as in the present embodiment, when the first and second slits 31 and 32 are combined with the first and second claw-shaped magnetic poles 21b and 22b, respectively, the magnetic flux of the annular magnet 23 is changed to the first and second slits 31 and 32, respectively. It can be efficiently distributed to the one claw-shaped magnetic pole 21b and each second claw-shaped magnetic pole 22b, and as a result, the motor performance can be improved.

  (4) Since the first and second slits 31 and 32 are provided at equal intervals in the circumferential direction, the first and second core bases 21a and 22a and the annular magnet 23 can be bonded in a balanced manner in the radial direction. Become. In addition, when the first and second slits 31 and 32 are formed in a groove shape extending from the inner peripheral side to the outer peripheral side, and combined with the configuration provided between the first and second claw-shaped magnetic poles 21b and 22b, respectively, The magnetic flux can be efficiently distributed by the first claw-shaped magnetic poles 21b and the second claw-shaped magnetic poles 22b, and as a result, the motor performance can be further improved.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the first and second slits 31 and 32 are linearly formed along the radial direction from the inner peripheral end to the outer peripheral end of the magnet fixing surfaces 21g and 22g, respectively. It does not specifically limit and it is good also as a structure which does not extend to the inner peripheral side edge part and outer peripheral side edge part of the magnet fixing surfaces 21g and 22g.

  Also, the first and second slits 31 and 32 may be shaped as shown in FIGS. 7A, 7B, and 7C, the second slit 32 of the second rotor core 22 is illustrated as an example. In the example shown in FIG. 7A, the second slit 32 extends spirally from the inner peripheral side to the outer peripheral side. Even with such a configuration, it is possible to obtain the same effect as in the present embodiment.

  In the example shown in FIG. 7B, the second slit 32 is formed in an annular shape along the circumferential direction around the axis of the second rotor core 22. Moreover, in the example shown in FIG.7 (c), it forms in the polygonal shape centering on the axis line of the 2nd rotor core 22 (In the same figure, it is a regular pentagonal shape as an example). In addition, in the example shown in FIG.7 (c), it is comprised so that the vertex of a regular pentagon may each be located inside the 2nd claw-shaped magnetic pole 22b. Even with the configuration as shown in FIGS. 7B and 7C, the same effect as the effect (1) of the present embodiment can be obtained.

  In the above embodiment and the configuration shown in FIGS. 7A, 7B, and 7C, the first and second adhesive recesses are slit-shaped, but other than this, for example, a plurality of magnet fixing surfaces 21g and 22g are formed. It is good also as the made hole.

In the above embodiment, the first and second slits 31 and 32 are grooves having a V-shaped cross section. However, for example, grooves having a U-shaped section, a U-shaped section, or a polygonal section may be used.
In the above embodiment, the number of the first and second slits 31 and 32 is five, but it is not particularly limited to this. For example, the number of the first and second slits 31 and 32 may be changed according to the change in the number of the first and second claw-shaped magnetic poles 21b and 22b. For example, two first slits 31 (or second slits 32) may be provided between each first claw-shaped magnetic pole 21b (or second claw-shaped magnetic pole 22b).

  In the above embodiment, the first and second slits 31 and 32 are formed in the first and second core bases 21a and 22a. However, the present invention is not limited to this, and the axial end surface 23a of the annular magnet 23 is not limited thereto. , 23b, or both the first and second core bases 21a, 22a and the annular magnet 23.

  In the above-described embodiment, the adhesive layer L is formed between the magnet fixing surfaces 21g and 22g other than the first and second slits 31 and 32 and the annular magnet 23. However, the present invention is particularly limited to this. Instead, the adhesive layer L may be omitted, and the portions other than the first and second slits 31 and 32 on the magnet fixing surfaces 21g and 22g may be in close contact with the annular magnet 23 in the axial direction. According to this configuration, since the gap between the magnet fixing surfaces 21g, 22g other than the first and second slits 31, 32 and the annular magnet 23 can be almost eliminated, the first and second rotor cores 21, It is possible to further suppress an increase in the magnetic resistance between 22 and the annular magnet 23, and as a result, it is possible to further suppress a decrease in motor performance.

  In the above embodiment, one annular magnet 23 is used as the field magnet, but a plurality of divided permanent magnets are arranged between the first and second core bases 21a and 22a around the rotating shaft 12. A configuration may be adopted.

In the above embodiment, although not particularly mentioned, the first and second rotor cores 21 and 22 and the armature core 7 may be configured by, for example, lamination of magnetic metal plate materials or molding of magnetic powder.
In the above embodiment, no particular reference is made to the method of winding the winding around the teeth of the stator 6, but concentrated winding or distributed winding may be used.

  DESCRIPTION OF SYMBOLS 1 ... Motor, 11 ... Rotor, 21 ... 1st rotor core, 21a ... 1st core base, 21b ... 1st claw-shaped magnetic pole, 21g ... Magnet fixing surface, 22 ... 2nd rotor core, 22a ... 2nd core base, 22b ... Second claw-shaped magnetic pole, 22g ... magnet fixing surface, 23 ... annular magnet (field magnet), 23a ... first axial end face, 23b ... second axial end face, 31 ... first slit (first adhesive recess) ), 32 ... second slit (second adhesive recess), 33 ... adhesive.

Claims (5)

A first rotor core having a plurality of first claw-shaped magnetic poles protruding radially outward and extending in the axial direction at an outer peripheral portion of a substantially disc-shaped first core base;
A plurality of second claw-shaped magnetic poles project radially outward and extend in the axial direction on the outer periphery of the substantially disk-shaped second core base, and correspond to each of the second claw-shaped magnetic poles. A second rotor core disposed between the first claw-shaped magnetic poles of the first rotor core;
The first claw-shaped magnetic pole is arranged between the first core base and the second core base and is magnetized in the axial direction so that the first claw-shaped magnetic pole functions as the first magnetic pole, and the second claw-shaped A field magnet that causes the magnetic pole to function as a second magnetic pole, the first core base and a first axial end face of the field magnet, and the second core base and a second axis of the field magnet. Each of the direction end faces is a rotor bonded with an adhesive,
At least one of the magnet fixing surface of the first core base and the first axial end surface of the field magnet is provided with a first adhesive recess that is recessed in the axial direction and into which the adhesive material enters.
At least one of the magnet fixing surface of the second core base and the second axial end surface of the field magnet is provided with a second adhesive recess recessed in the axial direction and containing the adhesive. Rotor. The rotor according to claim 1, wherein
The first adhesive recess is provided correspondingly between the first claw-shaped magnetic poles in the circumferential direction,
The rotor, wherein the second adhesive recess is provided correspondingly between the second claw-shaped magnetic poles in the circumferential direction. The rotor according to claim 1 or 2,
The first and second adhesive recesses have a groove shape extending from an inner peripheral side to an outer peripheral side. The rotor according to any one of claims 1 to 3,
The rotor according to claim 1, wherein the first and second adhesive recesses are provided at equal intervals in the circumferential direction.   A motor comprising the rotor according to claim 1.