JP6455211B2 - Rotor and motor - Google Patents

Description

  The present invention relates to a rotor and a motor.

  Conventionally, a rotor used in a motor has a disk-like shape between a pair of rotor cores each having a plurality of claw-shaped magnetic poles in the circumferential direction, as described in, for example, Patent Document 1. There is a so-called permanent magnet field Landell-type rotor in which field magnets are arranged so that the claw-shaped magnetic poles of a pair of rotor cores function alternately as different magnetic poles in the circumferential direction.

  The rotor described in Patent Document 1 includes a claw-shaped magnetic pole adjacent to the back surface of the claw-shaped magnetic pole, that is, a back magnet disposed between the claw-shaped magnetic pole and the field magnet, in addition to the field magnet. An inter-pole magnet disposed between them is provided as a rectifying magnet. The rectifying magnet is for reducing leakage magnetic flux in the rotor.

JP 2012-115085 A

In the rotor provided with the rectifying magnet as described above, the method of fixing the rectifying magnet has not been clarified specifically, and there has been a problem of how to fix the rectifying magnet satisfactorily.
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 that can satisfactorily fix a rectifying magnet.

A rotor that solves the above problems has a disc-shaped core base and a plurality of claw-shaped magnetic poles arranged in the circumferential direction at the outer peripheral edge of the core base, and the claw-shaped magnetic poles alternate in the circumferential direction. The first and second rotor cores stacked in the axial direction as described above, and the claw-shaped magnetic poles of the first rotor core disposed between the core base of the first rotor core and the core base of the second rotor core A field magnet magnetized in the axial direction so that the claw-shaped magnetic pole of the second rotor core functions as a magnetic pole different in the circumferential direction, and the claw-shaped magnetic pole arranged around the claw-shaped magnetic pole on the outer periphery of the field magnet. a rotor with a rectifier magnet claw-shaped magnetic poles of the same polarity face is magnetized so as to be opposed, and the claw-shaped magnetic poles and the rectifying magnet of the first and second rotor core with an adhesive It fixed surface fixed to each other Is a, on the fixed surface of the claw-shaped magnetic poles, the inflow recess.

According to this configuration, the claw-shaped magnetic poles of the first and second rotor cores and the rectifying magnet are fixed by the adhesive. Since the inflow recess is formed in the fixing surface of the claw-shaped magnetic pole, when the fixing surface and the fixing surface fixed to each other are overlapped, the adhesive interposed between the fixing surfaces is in the inflow recess. Inflow is possible. Accordingly, the adhesive is prevented from leaking to the outside from between the fixed surfaces fixed to each other, and the adhesive applied to the fixed surfaces easily stays between the fixed surfaces fixed to each other. Therefore, the rectifying magnet can be satisfactorily fixed with the adhesive.

In the rotor, the inflow recess is provided in a central portion in the circumferential direction of the claw-shaped magnetic pole and has a groove shape extending in the axial direction.

In the rotor, the rectifying magnet is a neodymium bonded magnet.

In the rotor, it is preferable that an inner peripheral surface of the inflow recess has an arc surface that is continuously formed from the fixed surface and is curved in an arc shape.
According to this configuration, since the circular arc surface is provided on the inner peripheral surface of the inflow recess, the adhesive between the fixed surfaces fixed to each other can easily flow into the inflow recess. Therefore, it is further suppressed that the adhesive leaks to the outside from between the fixed surfaces fixed to each other, and the adhesive applied to the fixed surface is more likely to stay between the fixed surfaces fixed to each other. Therefore, it is possible to better fix the rectifying magnet with the adhesive.

In the rotor, it is preferable that the inflow recess has a groove shape extending in the axial direction from one end to the other end in the axial direction of the fixed surface.
According to this configuration, the inflow recess has a simple shape such as a groove extending along the axial direction. Therefore, the inflow recess can be easily formed on the fixed surface. Further, since the inflow recess extends along the axial direction from one end to the other end in the axial direction of the fixed surface, the adhesive can flow into the inflow recess at any position in the axial direction on the fixed surface. Therefore, it is further suppressed that the adhesive leaks to the outside from between the fixing surfaces fixed to each other, and the adhesive applied to the fixing surfaces is more likely to stay between the fixing surfaces fixed to each other. . Therefore, the rectifying magnet can be fixed more favorably with the adhesive.

A motor that solves the above problem includes the rotor and a stator that generates a rotating magnetic field.
According to this configuration, the above-described effect can be obtained in the motor.

  According to the rotor and motor of the present invention, the rectifying magnet can be fixed satisfactorily.

It is sectional drawing of the motor of 1st Embodiment. It is a disassembled perspective view of the rotor of 1st Embodiment. It is a perspective view of the rotor core in 1st Embodiment. It is a perspective view of the rectifier magnet in a 1st embodiment. It is the elements on larger scale of the rotor of 1st Embodiment. It is a perspective view of the rotor of 1st Embodiment. It is sectional drawing of the rotor of 1st Embodiment. It is a disassembled perspective view of the rotor of 2nd Embodiment. (A) And (b) is sectional drawing of the rotor of 2nd Embodiment. It is the elements on larger scale of the rotor of another embodiment. It is the elements on larger scale of the rotor of another embodiment. It is the elements on larger scale of the rotor of another embodiment. It is the elements on larger scale of the rotor of another embodiment.

(First embodiment)
Hereinafter, a first embodiment of the motor will be described.
The motor 1 of this embodiment shown in FIG. 1 is a brushless motor. A motor case 2 that is an outer shell of the motor 1 includes a yoke housing 3 formed in a substantially bottomed cylindrical shape, and an end plate 4 that closes an opening of the yoke housing 3.

  An annular stator 5 is fixed to the inner peripheral surface of the yoke housing 3. The stator 5 includes a stator core 6 having a plurality of teeth 6a extending radially inward, and a winding 8 wound around the teeth 6a via an insulator 7. The stator 5 generates a rotating magnetic field when a drive current is supplied from an external control circuit S to the winding 8.

  A rotor 11 is disposed inside the stator 5. A pair of bearings 12 and 13 are provided at the center of the bottom of the yoke housing 3 and the center of the end plate 4. The rotating shaft 14 of the rotor 11 is rotatably supported by the pair of bearings 12 and 13. Note that the axial end of the rotary shaft 14 on the end plate 4 side penetrates the end plate 4 and protrudes to the outside of the motor case 2.

  The rotor 11 includes a pair of rotor cores (i.e., the first rotor core 15 and the second rotor core 16) fixed to the rotating shaft 14, a field magnet 17 disposed between the first rotor core 15 and the second rotor core 16, and And one rectifying magnet 18 disposed on the outer periphery of the field magnet 17.

  As shown in FIGS. 2 and 3, the first rotor core 15 includes a disk-shaped first core base 21 and a plurality (in the present embodiment, five) arranged in the circumferential direction at the outer peripheral edge of the first core base 21. The first claw-shaped magnetic pole 22 is provided. A through hole 21 a into which the rotary shaft 14 is inserted and fixed is formed in the radial center portion of the first core base 21. Further, the five first claw-shaped magnetic poles 22 are provided on the outer peripheral edge of the first core base 21 at equal intervals (72 ° intervals) in the circumferential direction.

  Each first claw-shaped magnetic pole 22 includes a first radially extending portion 22a extending radially outward from the outer peripheral edge of the first core base 21, and a distal end portion (radially outer end of the first radially extending portion 22a). Part) and a first magnetic pole part 22b protruding in one axial direction.

  The first radial extending portion 22a has a fan shape whose shape seen from the axial direction becomes wider in the circumferential direction as it goes outward in the radial direction. Moreover, the shape of the cross section orthogonal to the axial direction of the first magnetic pole portion 22b has a fan shape in which the width in the circumferential direction becomes wider toward the outer side in the radial direction. The side surfaces on both sides in the circumferential direction of the first claw-shaped magnetic pole 22 are both flat and parallel. In addition, the radially outer surface of each first magnetic pole portion 22b has an arc shape that is located on the same circle centered on the rotation axis of the rotor 11 when viewed from the axial direction. Further, each first claw-shaped magnetic pole 22 has a symmetrical shape with a plane passing through the center in the circumferential direction and orthogonal to the circumferential direction as a symmetry plane.

  As shown in FIGS. 3 and 5, the radially inner side surface of the first magnetic pole portion 22 b of each first claw-shaped magnetic pole 22 is fixed to the first core side fixed surface by the rectifying magnet 18 and the adhesive 41. 22c. Each of the first core-side fixing surfaces 22c has an arc shape that is located on the same circle with the rotation axis of the rotor 11 as the center when viewed from the axial direction. A first inflow recess 22d is formed on each first core-side fixing surface 22c. Each of the first inflow recesses 22d is provided in a central portion in the circumferential direction of each of the first core-side fixing surfaces 22c and has a groove shape extending along the axial direction. The first inflow recess 22d is formed from one end to the other end in the axial direction of the first core-side fixing surface 22c. Each of the first inflow recesses 22d has a cross-sectional shape orthogonal to the axial direction having a rectangular shape with a constant circumferential width, and the axial direction from one end to the other end of the first inflow recess 22d in the axial direction. The shape of the orthogonal cross section is constant. Each of the first inflow recesses 22d is open on the radially inner side and both sides in the axial direction.

  As shown in FIG. 2, the second rotor core 16 has the same shape as the first rotor core 15, and a plurality of second core bases 23 are arranged in the circumferential direction at the outer peripheral edge of the second core base 23 (in the present embodiment). 5) second claw-shaped magnetic poles 24. The second core base 23 having a through hole 23a through which the rotary shaft 14 is inserted and fixed has the same shape as the first core base 21 having the through hole 21a. The second claw-shaped magnetic pole 24 composed of the second radially extending portion 24a and the second magnetic pole portion 24b is a first claw-shaped composed of the first radial extending portion 22a and the first magnetic pole portion 22b. It has the same shape as the magnetic pole 22.

  Further, the radially inner side surface of the second magnetic pole portion 24b of each second claw-shaped magnetic pole 24 is fixed to the second core-side fixing surface 24c fixed by the rectifying magnet 18 and the adhesive 41 (not shown in FIG. 2). It has become. The second core-side fixing surface 24c has the same shape as the first core-side fixing surface 22c (see FIG. 3). A second inflow recess 24d having the same shape as the first inflow recess 22d (see FIG. 3) is formed in the second core-side fixing surface 24c.

  As shown in FIGS. 1, 2, and 6, the first rotor core 15 and the second rotor core 16 maintain the axial distance between each other when the rotary shaft 14 is press-fitted into the through holes 21 a and 23 a. However, it is fixed to the rotary shaft 14. The first and second rotor cores 15 and 16 are fixed to the rotating shaft 14 with the field magnet 17 and the rectifying magnet 18 sandwiched between the first rotor core 15 and the second rotor core 16. Further, the first rotor core 15 and the second rotor core 16 have a second claw between the first claw-shaped magnetic poles 22 adjacent to each other in the circumferential direction so that the tips of the magnetic pole portions 22b and 24b face in opposite directions. The magnetic poles 24 are overlapped in the axial direction so as to be arranged, and are fixed to the rotary shaft 14. And in the 1st and 2nd rotor cores 15 and 16 fixed to the rotating shaft 14, while the 1st magnetic pole part 22b and the 2nd magnetic pole part 24b are located in a line in the circumferential direction alternately, equidistant (36 in the circumferential direction) (° interval).

  As shown in FIGS. 1, 2 and 7, in the assembled state of the first and second rotor cores 15 and 16, the first core base 21 and the second core base 23 are parallel to each other, and a boundary is formed between them. A magnet 17 is disposed. The field magnet 17 is a disk-shaped permanent magnet made of, for example, a ferrite magnet. A through hole 17 a through which the rotating shaft 14 is inserted is formed at the radial center of the field magnet 17. One end surface in the axial direction of the field magnet 17 (upper end surface in FIG. 2) is the first core base 21, and the other end surface in the axial direction of the field magnet 17 (lower end surface in FIG. 2) is the second. The field magnet 17 is in contact with the core base 23, and is fixed between the first core base 21 and the second core base 23 in the axial direction. The outer diameter of the field magnet 17 is set so as to coincide with the outer diameter of each core base 21, 23.

  The field magnet 17 is magnetized in the axial direction so that the first claw-shaped magnetic pole 22 functions as an N pole and the second claw-shaped magnetic pole 24 functions as an S pole. That is, in the field magnet 17, the first core base 21 side is N-pole and the second core base 23 side is S so that the first claw-shaped magnetic pole 22 and the second claw-shaped magnetic pole 24 function as different magnetic poles in the circumferential direction. It is magnetized in the axial direction so as to be a pole. Thus, the rotor 11 of the present embodiment is a so-called Landel type rotor using the field magnet 17. In the rotor 11, five first claw-shaped magnetic poles 22 serving as N poles and five second claw-shaped magnetic poles 24 serving as S poles are alternately arranged in the circumferential direction, and the number of poles is 10 ( The number of counter electrodes is 5).

  As shown in FIG.2 and FIG.4, the rectifier magnet 18 consists of a neodymium bond magnet, for example. The rectifying magnet 18 has a substantially annular shape surrounding the outer periphery of the field magnet 17, and is disposed around the first and second claw-shaped magnetic poles 22 and 24 on the outer periphery of the field magnet 17. The rectifying magnet 18 includes first and second back magnet portions 31 and 32 and first and second interpole magnet portions 33 and 34.

  As shown in FIGS. 4, 6, and 7, the first back magnet portion 31 is a back surface (that is, a radially inner surface of each first claw-shaped magnetic pole 22 of the first rotor core 15 in the present embodiment. The first core-side fixing surface 22 c) and the outer peripheral surface 23 b of the second core base 23 are disposed. The second back magnet part 32 includes a back surface of each second claw-shaped magnetic pole 24 of the second rotor core 16 (that is, a radially inner surface, which is the second core-side fixing surface 24c in the present embodiment), It is arrange | positioned between the outer peripheral surfaces 21b of 1 core base 21. As shown in FIG. Therefore, in the rectifier magnet 18, the first back magnet portions 31 are provided at five locations that are equally spaced in the circumferential direction (72 ° intervals), and the second back magnet portions 31 that are adjacent between the first back magnet portions 31 in the circumferential direction are provided. A back magnet part 32 is provided. And the 1st back magnet part 31 and the 2nd back magnet part 32 are provided at intervals of 36 degrees by turns in the peripheral direction.

  As shown in FIGS. 4, 5, and 6, each first back magnet portion 31 is formed in an arc shape having a constant radial width. The radial width of each first back magnet part 31 has a value substantially equal to the interval between the first core-side fixing surface 22 c and the outer peripheral surface 23 b of the second core base 23. And the side surface of the radial direction outer side of each 1st back magnet part 31 is the 1st magnet side fixing surface 31a fixed with the 1st core side fixing surface 22c and the adhesive agent 41. As shown in FIG. The first magnet side fixing surface 31a has an arc shape with a curvature substantially equal to the curvature of the first core side fixing surface 22c. In addition, the radially inner side surface of the first back magnet part 31 has an arc shape with a curvature substantially equal to the curvature of the outer peripheral surface 23 b of the second core base 23. The first interpole magnet portion 33 is integrally formed at one end portion in the circumferential direction of each first back magnet portion 31 (the end portion on the counterclockwise direction in FIG. 4), and the other end portion in the circumferential direction ( A second inter-pole magnet portion 34 is integrally formed on the end portion on the clockwise side in FIG.

  Each second back magnet part 32 has the same shape as the first back magnet part 31. However, the first back magnet portion 31 is formed on one end side (the lower end side in FIG. 4) of the first and second interpole magnet portions 33 and 34 in the axial direction, whereas the second back magnet portion 31 is formed. 32 is formed on the other end side (the upper end side in FIG. 4) of the first and second interpole magnet portions 33, 34 in the axial direction. The side surface on the radially outer side of each second back magnet part 32 is a second magnet side fixing surface 32 a that is fixed by the second core side fixing surface 24 c and the adhesive 41. The second magnet side fixing surface 32a has an arc shape with a curvature substantially equal to the curvature of the second core side fixing surface 24c.

  The first back magnet portion 31 has an outer peripheral surface of the second core base 23 on the side opposite to the first core-side fixed surface 22c of the first claw-shaped magnetic pole 22 and the N pole having the same polarity as the first claw-shaped magnetic pole 22. The side facing 23 b is magnetized so as to be the S pole having the same polarity as the second core base 23. In addition, the second back magnet portion 32 has an outer peripheral surface of the first core base 21 on the side opposite to the second core-side fixed surface 24c of the second claw-shaped magnetic pole 24 and the S pole having the same polarity as the second claw-shaped magnetic pole 24 The side facing 21 b is magnetized so as to be an N pole having the same polarity as the first core base 21.

  As shown in FIGS. 4 to 7, the first and second interpole magnet portions 33 and 34 are arranged between the first claw-shaped magnetic pole 22 and the second claw-shaped magnetic pole 24 that are adjacent in the circumferential direction. Has been. More specifically, the first interpole magnet portion 33 includes one circumferential end face 22e (the counterclockwise end face in FIG. 6) of the first claw-shaped magnetic pole 22 and the other circumferential end face of the second claw-shaped magnetic pole 24. 24e (the end surface on the clockwise side in FIG. 6). The second interpole magnet portion 34 has the other circumferential end face 22f (the end face on the clockwise side in FIG. 6) of the first claw-shaped magnetic pole 22 and one circumferential end face 24f (see FIG. 6). 6 and the counterclockwise end face).

  The first interpole magnet portion 33 has a columnar shape in which the cross-sectional shape orthogonal to the axial direction forms a fan shape. The circumferential width of the first interpole magnet portion 33 is the circumferential distance between one circumferential end surface 22e of the first claw-shaped magnetic pole 22 and the other circumferential end surface 24e of the second claw-shaped magnetic pole 24. It is formed approximately equally. Further, the radial width of the first interpole magnet portion 33 is formed to be substantially equal to the radial width of the first claw-shaped magnetic pole 22. Further, the axial length of the first interpole magnet portion 33 is formed to be equal to the axial length of the first claw-shaped magnetic pole 22. Then, the radially outer side surface of the first interpole magnet portion 33 is centered on the rotational axis of the rotor 11 together with the radially outer side surfaces of the first and second claw-shaped magnetic poles 22 and 24 when viewed from the axial direction. Then it is located on the same circle. The second interpole magnet portion 34 has the same shape as the first interpole magnet portion 33. The first and second interpole magnet portions 33 and 34 are magnetized in the circumferential direction so that surfaces having the same polarity as the first and second claw-shaped magnetic poles 22 and 24 face each other. That is, the first and second interpole magnet portions 33 and 34 are magnetized in the circumferential direction so that the first claw-shaped magnetic pole 22 side is the N pole and the second claw-shaped magnetic pole 24 side is the S pole.

  As shown in FIG. 1, a sensor magnet 52 is fixed to the rotating shaft 14 via a sensor magnet fixing member 51 having a substantially disk shape. The sensor magnet fixing member 51 is externally fitted and fixed to a portion of the rotary shaft 14 between the bearing 13 and the first rotor core 15. The outer diameter of the sensor magnet fixing member 51 is smaller than the outer diameter of the first rotor core 15 and larger than the outer diameter of the first core base 21. The sensor magnet 52 has an annular shape along the outer peripheral edge of the sensor magnet fixing member 51. Further, the sensor magnet 52 faces the first claw-shaped magnetic pole 22 in the axial direction with the sensor magnet fixing member 51 interposed therebetween. The sensor magnet 52 is magnetized so that the N pole and the S pole are alternately arranged in the circumferential direction.

  The end plate 4 is provided with a Hall IC 53 as a magnetic sensor so as to face the sensor magnet 52 in the axial direction. The Hall IC 53 outputs an H level detection signal and an L level detection signal to the control circuit S when sensing the magnetic fields of the N pole and the S pole based on the sensor magnet 52.

Next, the operation of the first embodiment will be described.
When a three-phase drive current is supplied from the control circuit S to the winding 8, a rotating magnetic field is generated in the stator 5 and the rotor 11 is driven to rotate. At this time, the level of the detection signal output from the Hall IC 53 is switched according to the rotation angle (position) of the rotor 11 as the sensor magnet 52 facing the Hall IC 53 rotates. Based on the detection signal, a three-phase drive current that is switched to the winding 8 from the control circuit S at an optimal timing is supplied. As a result, a rotating magnetic field is generated satisfactorily, and the rotor 11 is driven to rotate continuously.

  As shown in FIGS. 2, 5, and 6, in such a motor 1, the first and second rotor cores 15 and 16 provided in the rotor 11 and the rectifying magnet 18 are fixed by an adhesive 41. . Specifically, the first core-side fixing surface 22 c of the first claw-shaped magnetic pole 22 and the first magnet-side fixing surface 31 a of the first back magnet portion 31 are fixed by the adhesive 41. Further, the second core-side fixing surface 24 c of the second claw-shaped magnetic pole 24 and the second magnet-side fixing surface 32 a of the second back magnet part 32 are fixed by an adhesive 41.

  When the first core-side fixing surface 22c and the first magnet-side fixing surface 31a are bonded and fixed, after the adhesive 41 is applied to the first core-side fixing surface 22c, the first core-side fixing surface 22c and the first magnet-side fixing surface 22c The magnet side fixed surface 31a is overlapped. At this time, since the first inflow recess 22d is provided in the first core-side fixing surface 22c, the adhesive 41 between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a is the first It can flow into the inflow recess 22d. The adhesive 41 may be applied to the first magnet side fixing surface 31a, or may be applied to both the first core side fixing surface 22c and the first magnet side fixing surface 31a.

  Similarly, when the second core side fixing surface 24c and the second magnet side fixing surface 32a are bonded and fixed, after the adhesive 41 is applied to the second core side fixing surface 24c, the second core side fixing surface 24c is applied. And the second magnet side fixing surface 32a are overlapped. At this time, since the second inflow recess 24d is provided in the second core-side fixing surface 24c, the adhesive 41 between the second core-side fixing surface 24c and the second magnet-side fixing surface 32a is the second It can flow into the inflow recess 24d. The adhesive 41 may be applied to the second magnet side fixing surface 32a, or may be applied to both the second core side fixing surface 24c and the second magnet side fixing surface 32a.

  When the adhesive 41 is cured, the first core side fixing surface 22c and the first magnet side fixing surface 31a, and the second core side fixing surface 24c and the second magnet side fixing surface 32a are fixed by the adhesive 41, respectively. Is done. Thereby, the first and second rotor cores 15 and 16 and the rectifying magnet 18 are fixed by the adhesive 41.

Next, characteristic effects of the first embodiment will be described.
(1) The first and second rotor cores 15 and 16 and the rectifying magnet 18 are fixed with an adhesive 41. And since the 1st inflow recessed part 22d is formed in the 1st core side fixed surface 22c, when the 1st core side fixed surface 22c and the 1st magnet side fixed surface 31a which are mutually fixed are piled up, The adhesive 41 interposed between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a can flow into the first inflow recess 22d. Further, since the second inflow recess 24d is formed in the second core-side fixing surface 24c, when the second core-side fixing surface 24c and the second magnet-side fixing surface 32a that are fixed to each other are overlapped, The adhesive 41 interposed between the second core-side fixing surface 24c and the second magnet-side fixing surface 32a can flow into the second inflow recess 24d. Therefore, from between the first core side fixing surface 22c and the first magnet side fixing surface 31a fixed to each other, and from between the second core side fixing surface 24c and the second magnet side fixing surface 32a fixed to each other. Leakage of the adhesive 41 to the outside is suppressed. Therefore, the adhesive 41 applied to the first core-side fixing surface 22c tends to stay between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a, and is applied to the second core-side fixing surface 24c. The adhesive 41 tends to stay between the second core-side fixing surface 24c and the second magnet-side fixing surface 32a. Therefore, the rectifier magnet 18 can be satisfactorily fixed by the adhesive 41.

  (2) The first inflow recess 22d and the second inflow recess 24d have a simple shape called a groove extending along the axial direction. Accordingly, the first inflow recess 22d can be easily formed in the first core-side fixing surface 22c, and the second inflow recess 24d can be easily formed in the second core-side fixing surface 24c. Further, since the first inflow recess 22d extends along the axial direction from one end to the other end in the axial direction of the first core-side fixing surface 22c, at any position in the axial direction on the first core-side fixing surface 22c. Also, the adhesive 41 can flow into the first inflow recess 22d. Similarly, the second inflow recess 24d extends along the axial direction from one end to the other end in the axial direction of the second core-side fixing surface 24c, and therefore any position in the axial direction on the second core-side fixing surface 24c. Also, the adhesive 41 can flow into the second inflow recess 24d. Therefore, from between the first core side fixing surface 22c and the first magnet side fixing surface 31a fixed to each other, and from between the second core side fixing surface 24c and the second magnet side fixing surface 32a fixed to each other. It is further suppressed that the adhesive 41 leaks outside. Therefore, the adhesive 41 applied to the first core-side fixing surface 22c is more likely to stay between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a, and is applied to the second core-side fixing surface 24c. The adhesive 41 thus made is more likely to stay between the second core-side fixing surface 24c and the second magnet-side fixing surface 32a. Therefore, the rectifier magnet 18 can be fixed more favorably with the adhesive 41.

(3) The rectifier magnet 18 can be easily fixed to the first and second rotor cores 15 and 16 by the adhesive 41.
(Second Embodiment)
Hereinafter, a second embodiment of the motor will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

A rotor 61 of the second embodiment shown in FIGS. 8 and 9A is provided in the motor 1 in place of the rotor 11 of the first embodiment.
The rotor 61 includes a cylindrical fixed cylinder 62 fixed to the rotating shaft 14, a pair of first and second rotor cores 63 and 64 fixed to the fixed cylinder 62, and the first and second rotor cores 63 and 64. And the first and second back magnets 66 and 67 and the first and second interpole magnets 68 and 69 disposed on the outer periphery of the field magnet 65.

  The first rotor core 63 is formed of a magnetic steel plate made of a soft magnetic material, and includes a disk-shaped first core base 71 and a plurality (four in this embodiment) arranged in the circumferential direction at the outer peripheral edge of the first core base 71. ) First claw-shaped magnetic poles 72. A through hole 71 a into which the fixed cylinder 62 is inserted and fixed is formed at the radial center of the first core base 71. The four first claw-shaped magnetic poles 72 are provided at equal intervals (90 ° intervals) in the circumferential direction on the outer peripheral edge of the first core base 71.

  Each first claw-shaped magnetic pole 72 includes a first radial extension 72 a extending radially outward from the outer peripheral edge of the first core base 71, and a distal end (radial outer end) of the first radial extension 72 a. Part) and a first magnetic pole part 72b protruding in one axial direction. The first radially extending portion 72a has a fan shape in which the shape seen from the axial direction becomes wider in the circumferential direction as it goes outward in the radial direction. Moreover, the shape of the cross section orthogonal to the axial direction of the first magnetic pole portion 72b is a fan shape in which the width in the circumferential direction becomes wider toward the outside in the radial direction. Further, the radially outer side surface of each first magnetic pole portion 72b has an arcuate shape located on the same circle centered on the rotation axis of the rotor 61 when viewed from the axial direction. Further, the radially inner side surfaces of the first magnetic pole portions 72b of the four first claw-shaped magnetic poles 72 have an arc shape located on the same circle centering on the rotation axis of the rotor 61 as viewed from the axial direction. Yes. Further, both end surfaces in the circumferential direction of the first claw-shaped magnetic pole 72 are first core-side fixing surfaces 72c fixed by the first interpole magnet 68 or the second interpole magnet 69 and the adhesive 41. The first core-side fixing surface 72c has a planar shape extending in the radial direction and is parallel to the axial direction. Each first claw-shaped magnetic pole 72 has a symmetrical shape with a plane passing through the center in the circumferential direction and orthogonal to the circumferential direction as a symmetry plane.

  The second rotor core 64 has the same shape as the first rotor core 63, and the second core base 81 and a plurality of (four in this embodiment) second claws arranged in the circumferential direction on the outer peripheral edge of the second core base 81. And a magnetic pole 82. The second core base 81 having the through hole 81a through which the fixed cylinder 62 is inserted and fixed has the same shape as the first core base 71 having the through hole 71a. The second claw-shaped magnetic pole 82 composed of the second radially extending portion 82a and the second magnetic pole portion 82b is a first claw-shaped composed of the first radial extending portion 72a and the first magnetic pole portion 72b. It has the same shape as the magnetic pole 72. In addition, both end surfaces in the circumferential direction of the second claw-shaped magnetic pole 82 are second core-side fixing surfaces 82 c that are fixed by the first interpole magnet 68 or the second interpole magnet 69 and the adhesive 41. Similarly to the first core-side fixing surface 72c, the second core-side fixing surface 82c has a planar shape extending along the radial direction and is parallel to the axial direction.

  The first rotor core 63 and the second rotor core 64 are fixed to the fixed cylinder 62 while the fixed cylinder 62 is press-fitted into the through holes 71a and 81a so that the axial interval between the first rotor core 63 and the second rotor core 64 is maintained. Then, the fixed cylinder 62 is externally fixed to the rotating shaft 14, whereby the first rotor core 63 and the second rotor core 64 are fixed to the rotating shaft 14 via the fixed cylinder 62. The first and second rotor cores 63 and 64 are fixed to the fixed cylinder 62 with the field magnet 65 sandwiched between the first rotor core 63 and the second rotor core 64. The first rotor core 63 and the second rotor core 64 have a second claw between the first claw-shaped magnetic poles 72 adjacent to each other in the circumferential direction so that the tips of the magnetic pole portions 72b and 82b face in opposite directions. The magnetic poles 82 are stacked in the axial direction so as to be arranged, and are fixed to the fixed cylinder 62. In the first and second rotor cores 63 and 64 fixed to the fixed cylinder 62, the first magnetic pole portions 72b and the second magnetic pole portions 82b are alternately arranged in the circumferential direction and are equally spaced in the circumferential direction (45 (° interval).

  In the assembled state of the first and second rotor cores 63 and 64, the first core base 71 and the second core base 81 are parallel to each other, and the field magnet 65 is disposed therebetween. The field magnet 65 is a disk-shaped permanent magnet made of, for example, a neodymium magnet. A through hole 65 a through which the fixed cylinder 62 is inserted is formed at the radial center of the field magnet 65. One end surface in the axial direction of the field magnet 65 (left end surface in FIG. 8) is the first core base 71, and the other end surface in the axial direction of the field magnet 65 (right end surface in FIG. 8) is the second core. The field magnet 65 is in contact with the base 81, and is fixed between the first core base 71 and the second core base 81 in the axial direction. The outer diameter of the field magnet 65 is set so as to coincide with the outer diameter of each of the core bases 71 and 81.

  The field magnet 65 is magnetized in the axial direction so that the first claw-shaped magnetic pole 72 functions as an N pole and the second claw-shaped magnetic pole 82 functions as an S pole. That is, in the field magnet 65, the first core base 71 side is N-pole and the second core base 81 side is S so that the first claw-shaped magnetic pole 72 and the second claw-shaped magnetic pole 82 function as different magnetic poles in the circumferential direction. It is magnetized in the axial direction so as to be a pole. As described above, the rotor 61 of the present embodiment is a so-called Landel type rotor using the field magnet 65. In the rotor 61, four first claw-shaped magnetic poles 72 serving as N poles and four second claw-shaped magnetic poles 82 serving as S poles are alternately arranged in the circumferential direction, and the number of poles is eight ( The number of counter electrodes is 4).

  The first back magnet 66 includes a back surface 72d of each first claw-shaped magnetic pole 72 of the first rotor core 63 (that is, a radially inner surface of the first claw-shaped magnetic pole 72), an outer peripheral surface 81b of the second core base 81, and a field. It arrange | positions between the outer peripheral surfaces 65b of the magnet 65. The second back magnet 67 includes a back surface 82 d of each second claw-shaped magnetic pole 82 of the second rotor core 64 (that is, a radially inner surface of the second claw-shaped magnetic pole 82) and an outer peripheral surface 71 b of the first core base 71. And the outer peripheral surface 65 b of the field magnet 65. Accordingly, in the rotor 61, the first back magnets 66 are arranged at four locations that are equally spaced (90 ° intervals) in the circumferential direction, and the second back magnets are disposed between the first back magnets 66 adjacent in the circumferential direction. 67 is arranged. The first back magnet 66 and the second back magnet 67 are alternately arranged at 45 ° intervals in the circumferential direction.

  The first back magnet 66 has a fan shape having a constant radial width when viewed from the axial direction. The radial width of the first back magnet 66 is substantially equal to the distance between the back surface 72 d of the first claw-shaped magnetic pole 72 and the outer peripheral surface 81 b of the second core base 81. Further, the radially outer side surface of the first back magnet 66 has an arc shape with a curvature substantially equal to the curvature of the back surface 72 d of the first claw-shaped magnetic pole 72, and abuts on the back surface 72 d of the first claw-shaped magnetic pole 72. ing. Further, the radially inner side surface of the first back magnet 66 has an arc shape with a curvature substantially equal to the curvature of the outer peripheral surface 81 b of the second core base 81, and the outer peripheral surface 81 b of the second core base 81 and the field magnet The magnet 65 is in contact with the outer peripheral surface 65 b of the magnet 65. The length of the first back magnet 66 in the axial direction is substantially equal to the sum of the length of the second core base 81 in the axial direction and the length of the field magnet 65 in the axial direction. One end surface in the axial direction of the first back magnet 66 (the left end surface in FIG. 8) abuts on the first radially extending portion 72a, and the other end surface in the axial direction of the first back magnet 66 (FIG. 8). The right end face) is located in the same plane as the axial front end face of the first magnetic pole portion 72b. Further, the circumferential width of the first back magnet 66 is formed to be equal to the circumferential width of the first radially extending portion 72a. Then, both end surfaces in the circumferential direction of the first back magnet 66 are first back magnet side fixing surfaces 66 a fixed by the first interpole magnet 68 or the second interpole magnet 69 and the adhesive 41. The first back magnet side fixed surface 66a has a planar shape extending in the radial direction and parallel to the axial direction. The first back magnet side fixing surfaces 66 a are located on the same plane as the first core side fixing surfaces 72 c at both ends in the circumferential direction of the first claw-shaped magnetic pole 72 on both sides in the circumferential direction of the first back magnet 66.

  In such a first back magnet 66, the side facing the back surface 72 d of the first claw-shaped magnetic pole 72 is the north pole of the same polarity as the first claw-shaped magnetic pole 72, and the side abutting on the outer peripheral surface 81 b of the second core base 81 is the side. The second core base 81 is magnetized to have the same polarity as the S pole.

  Each second back magnet 67 has the same shape as the first back magnet 66. The radially outer side surface of each second back magnet 67 abuts on the back surface 82 d of the second claw-shaped magnetic pole 82, and the radially inner side surface of the second back magnet 67 is the outer peripheral surface 71 b of the first core base 71. And an outer peripheral surface 65b of the field magnet 65. Further, one end surface in the axial direction of the second back magnet 67 (the end surface on the right side in FIG. 8) abuts on the second radially extending portion 82a, and the other end surface in the axial direction of the second back magnet 67 (FIG. 8). (The left end face) is located in the same plane as the axial end face of the second magnetic pole portion 82b. Furthermore, both end surfaces in the circumferential direction of the second back magnet 67 are second back magnet side fixing surfaces 67 a fixed by the first interpole magnet 68 or the second interpole magnet 69 and the adhesive 41. The second back magnet side fixing surface 67 a is located on the same plane as the second core side fixing surfaces 82 c at both ends in the circumferential direction of the second claw-shaped magnetic pole 82 on both sides in the circumferential direction of the second back magnet 67.

  The second back magnet 67 has the second claw-shaped magnetic pole 82 facing the back surface 82d on the side opposite to the second claw-shaped magnetic pole 82 and the S pole having the same polarity as the second claw-shaped magnetic pole 82. It is magnetized so as to be an N pole having the same polarity as the one core base 71.

The first and second interpole magnets 68 and 69 are arranged between the first claw-shaped magnetic pole 72 and the second claw-shaped magnetic pole 82 adjacent in the circumferential direction.
The first interpole magnet 68 is between the first back magnet 66 and the second back magnet 67 adjacent to each other in the circumferential direction, and is one first core-side fixed surface 72c of the first claw-shaped magnetic pole 72 (FIG. 9). In FIG. 9A, it is disposed between the end face on the clockwise side) and the other second core side fixed face 82c of the second claw-shaped magnetic pole 82 (the end face on the counterclockwise side in FIG. 9A). The first interpole magnet 68 has a columnar shape in which the cross-sectional shape orthogonal to the axial direction forms a fan shape. The circumferential width of the first interpole magnet 68 is between the first core-side fixed surface 72c of the first claw-shaped magnetic pole 72 and the other second core-side fixed surface 82c of the second claw-shaped magnetic pole 82. It is formed approximately equal to the circumferential interval. Further, the radial width of the first interpole magnet 68 is formed to be substantially equal to the radial width of the first claw-shaped magnetic pole 72. Further, the axial length of the first interpole magnet 68 is formed to be equal to the axial length of the first claw-shaped magnetic pole 72. The radially outer side surface of the first interpole magnet 68 is centered on the rotational axis of the rotor 61 together with the radially outer side surfaces of the first and second claw-shaped magnetic poles 72 and 82 when viewed from the axial direction. Located on the same circle.

  As shown in FIG. 9B, both end surfaces of the first interpole magnet 68 in the circumferential direction are on the first interpole magnet side fixed by the first back magnet 66 or the second back magnet 67 and the adhesive 41. It is a fixed surface 68a. Each first interpole magnet side fixing surface 68a has a planar shape extending in the radial direction and parallel to the axial direction. And the 1st inflow recessed part 68b is formed in each 1st pole magnet side fixed surface 68a. Each of the first inflow recesses 68b is provided in the central portion in the radial direction of each of the first inter-pole magnet side fixing surfaces 68a, and has a groove shape extending along the axial direction. The first inflow recess 68b is formed from one end to the other end in the axial direction of the first inter-pole magnet side fixing surface 68a. Each of the first inflow recesses 68b has a rectangular cross-section orthogonal to the axial direction, and has a rectangular shape with a constant radial width. The first inflow recess 68b is axially extended from one end to the other end in the axial direction. The shape of the orthogonal cross section is constant. Further, each first inflow recess 68b opens on one side in the circumferential direction and on both sides in the axial direction.

  As shown in FIGS. 8 and 9A, the second interpole magnet 69 has the same shape as the first interpole magnet 68. The second inter-pole magnet 69 is between the first back magnet 66 and the second back magnet 67 adjacent to each other in the circumferential direction, and is the other first core-side fixed surface 72c of the first claw-shaped magnetic pole 72 (FIG. 9). (A) a counterclockwise end face) and one second core-side fixing face 82c of the second claw-shaped magnetic pole 82 (clockwise end face in FIG. 9A). Further, both end surfaces in the circumferential direction of the second interpole magnet 69 are second interpole magnet side fixing surfaces 69 a fixed by the first back magnet 66 or the second back magnet 67 and the adhesive 41. Furthermore, a second inflow recess 69b having the same shape as the first inflow recess 68b is formed in each second interpole magnet side fixing surface 69a.

  The first and second interpole magnets 68 and 69 are magnetized in the circumferential direction so that the surfaces of the same polarity as the first and second claw-shaped magnetic poles 72 and 82 face each other. That is, the first and second interpole magnets 68 and 69 are magnetized in the circumferential direction so that the first claw-shaped magnetic pole 72 side is the N pole and the second claw-shaped magnetic pole 82 side is the S pole.

Next, the operation of the second embodiment will be described.
As shown in FIGS. 9A and 9B, the four first back magnets 66, the four second back magnets 67, the four first interpole magnets 68, and the four second poles. The intermediate magnet 69 is arranged on the outer periphery of the field magnet 65 so as to surround the outer periphery of the field magnet 65 and to form a ring shape as a whole. Of the four first back magnets 66, the four second back magnets 67, the four first interpole magnets 68, and the four second interpole magnets 69, the magnets adjacent in the circumferential direction are adjacent to each other. They are fixed to each other with an adhesive 41.

  More specifically, the first interpole magnet side fixing surface 68a on the other side in the circumferential direction of the first interpole magnet 68 (counterclockwise side in FIG. 9) and the one side in the circumferential direction of the first back magnet 66 (see FIG. 9, the first back magnet side fixing surface 66 a (clockwise in FIG. 9) and the first core side fixing surface 72 c on the circumferential side of the first claw-shaped magnetic pole 72 (clockwise in FIG. 9) serve as the adhesive 41. Is fixed. When the first back magnet 66 and the first back magnet 66 and the first claw-shaped magnetic pole 72 adjacent to the first back magnet 66 in the circumferential direction are bonded and fixed, the first back magnet 66 is bonded to the first interpole magnet side fixed surface 68a. Agent 41 is applied. The adhesive 41 may be applied to the first core-side fixing surface 72c and the first back magnet-side fixing surface 66a, or the first interpolar magnet-side fixing surface 68a, the first core-side fixing surface 72c, and the first core-side fixing surface 72c. You may apply | coat to all the 1 back magnet side fixed surfaces 66a. Thereafter, the first interpole magnet side fixing surface 68a is superposed on the first back magnet side fixing surface 66a and the first core side fixing surface 72c which are opposed to the first interpole magnet side fixing surface 68a in the circumferential direction. . At this time, the first interpole magnet side fixing surface 68a is provided with the first inflow recess 68b. Therefore, the first back magnet side fixing surface 66a and the first core side fixing surface 72c and the first interpole magnet side fixing are provided. The adhesive 41 between the surface 68a can flow into the first inflow recess 68b. When the adhesive 41 is cured, the first inter-pole magnet side fixing surface 68a, the first core side fixing surface 72c, and the first back magnet side fixing surface 66a that are opposed in the circumferential direction are fixed by the adhesive 41. Is done. That is, the first interpole magnet 68, the first back magnet 66, and the first claw-shaped magnetic pole 72 arranged in the circumferential direction are fixed by the adhesive 41.

  Similarly, the first interpole magnet side fixing surface 68a on the one side in the circumferential direction of the first interpole magnet 68 (clockwise side in FIG. 9) and the other side in the circumferential direction of the second back magnet 67 (FIG. 9). The second back magnet side fixing surface 67a (counterclockwise in FIG. 9) and the second core side fixing surface 82c on the other circumferential side (counterclockwise side in FIG. 9) of the second claw-shaped magnetic pole 82 are the adhesive 41. It is fixed at.

  Similarly, the second interpole magnet side fixing surface 69a on the one side in the circumferential direction of the second interpole magnet 69 (clockwise side in FIG. 9) and the other side in the circumferential direction of the first back magnet 66 (see FIG. 9 and the first core-side fixing surface 72c on the other side in the circumferential direction of the first claw-shaped magnetic pole 72 (counterclockwise side in FIG. 9). It is fixed at 41.

  Similarly, the second interpole magnet side fixing surface 69a on the other circumferential side of the second interpole magnet 69 (counterclockwise side in FIG. 9) and one circumferential side of the second back magnet 67 ( The second back magnet side fixing surface 67a on the clockwise side in FIG. 9 and the first core side fixing surface 72c on the one side in the circumferential direction of the second claw-shaped magnetic pole 82 (clockwise side in FIG. 9) are the adhesive 41. It is fixed at.

According to the second embodiment, in addition to the same effect as (2) of the first embodiment, the following characteristic effects can be obtained.
(1) Among the four first back magnets 66, the four second back magnets 67, the four first interpole magnets 68, and the four second interpole magnets 69, magnets adjacent in the circumferential direction Fix with adhesive 41. And since the 1st inflow recessed part 68b is formed in the 1st interpole magnet side fixed surface 68a, the 1st interpole magnet side fixed surface 68a and the 1st back magnet side fixed surface 66a which are mutually fixed, and the 1st When the core-side fixing surface 72c is overlapped, the adhesive 41 interposed therebetween can flow into the first inflow recess 68b. Further, when the first interpole magnet side fixing surface 68a, the second back magnet side fixing surface 67a, and the second core side fixing surface 82c, which are fixed to each other, are overlapped, the adhesive 41 interposed therebetween is 1 can flow into the inflow recess 68b. Similarly, since the second inflow recess 69b is formed in the second interpole magnet side fixing surface 69a, the second interpole magnet side fixing surface 69a, the first back magnet side fixing surface 66a and the second back magnet side fixing surface 69a are fixed to each other. When the first core-side fixing surface 72c is overlapped, the adhesive 41 interposed therebetween can flow into the second inflow recess 69b. Further, when the second interpole magnet side fixing surface 69a, the second back magnet side fixing surface 67a, and the second core side fixing surface 82c, which are fixed to each other, are overlapped, the adhesive 41 interposed therebetween is 2 Can flow into the inflow recess 69b. Therefore, between the first interpole magnet side fixing surface 68a fixed to each other and the first back magnet side fixing surface 66a and the first core side fixing surface 72c, the first interpole magnet side fixing surface 68a fixed to each other. It is suppressed that the adhesive 41 leaks to the outside from between the second back magnet side fixing surface 67a and the second core side fixing surface 82c. Similarly, the second interpole magnet side fixing surface 69a fixed to each other between the second interpole magnet side fixing surface 69a and the first back magnet side fixing surface 66a and the first core side fixing surface 72c fixed to each other. And the second back magnet side fixing surface 67a and the second core side fixing surface 82c are prevented from leaking to the outside. Therefore, the adhesive 41 applied to the first interpole magnet side fixing surface 68a is between the first interpole magnet side fixing surface 68a or the second interpole magnet side fixing surface 69a facing in the circumferential direction, and It becomes easy to stay between the 1st core side fixing surface 72c or the 2nd core side fixing surface 82c which opposes the circumferential direction. Also, the adhesive 41 applied to the second interpole magnet side fixing surface 69a is between the first interpole magnet side fixing surface 68a or the second interpole magnet side fixing surface 69a facing in the circumferential direction, and It becomes easy to stay between the 1st core side fixing surface 72c or the 2nd core side fixing surface 82c which opposes the circumferential direction. Therefore, the first and second back magnets 66 and 67 and the first and second interpole magnets 68 and 69 can be satisfactorily fixed by the adhesive 41.

  (2) Among the first back magnet 66, the second back magnet 67, the first interpole magnet 68, and the second interpole magnet 69, the magnets adjacent in the circumferential direction can be easily fixed by the adhesive 41. . Further, the first and second interpole magnets 68 and 69 and the first and second rotor cores 63 and 64 can be easily fixed by the adhesive 41.

In addition, you may change each said embodiment as follows.
In the first embodiment, the first inflow recess 22d has a groove shape extending in the axial direction from one end to the other end in the axial direction of the first core-side fixing surface 22c. However, the shape of the first inflow recess 22d is not limited to this. For example, the first inflow recess 22d may be shorter than the axial length of the first core-side fixing surface 22c. Further, the first inflow recess 22d may be formed in a groove shape extending in the circumferential direction on the first core-side fixing surface 22c. The first inflow recess 22d is not limited to a groove shape, and may be a concave shape such as a hemisphere, a rectangular parallelepiped, a triangular pyramid, or a cone. Furthermore, a plurality of first inflow recesses 22d may be formed on the first core-side fixing surface 22c. The same applies to the second inflow recess 24d provided on the second core-side fixing surface 24c.

  The first inflow recess 68b and the second inflow recess 69b of the second embodiment are not limited to the shape of the second embodiment. For example, the first interpole magnet side fixing surface 68a and the second interpole magnet side A groove shape shorter than the axial length of the fixed surface 69a or a groove shape extending in the radial direction may be used. Further, the first inflow recess 68b and the second inflow recess 69b may have a concave shape such as a hemispherical shape, a rectangular parallelepiped shape, a triangular pyramid shape, or a conical shape. Further, a plurality of first inflow recesses 68b may be formed on the first interpole magnet side fixing surface 68a, and a plurality of second inflow recesses 69b may be formed on the second interpole magnet side fixing surface 69a.

  As shown in FIG. 10, instead of the first inflow recess 22d of the first embodiment, a first inflow recess 101 may be provided on the first core-side fixing surface 22c. The first inflow recess 101 has a groove shape extending along the axial direction, and is open to the first magnet side fixing surface 31a side (in the radial direction in FIG. 10). And the inner peripheral surface of the 1st inflow recessed part 101 is continuously formed in the both ends of the circumferential direction from the 1st core side fixing surface 22c, and the inclined surface 101a inclined with respect to the 1st core side fixing surface 22c. Have. The inclined surface 101a and the first core-side fixing surface 22c form an obtuse angle on the first magnet-side fixing surface 31a side to which the first core-side fixing surface 22c is fixed. If it does in this way, the adhesive agent between the 1st core side fixing surface 22c and the 1st magnet side fixing surface 31a mutually fixed by providing the inclined surface 101a in the internal peripheral surface of the 1st inflow recessed part 101. 41 becomes easier to flow into the first inflow recess 101. Accordingly, the adhesive 41 is further prevented from leaking outside between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a that are fixed to each other, and the first core-side fixing surface 22c or the first magnet is prevented. The adhesive 41 applied to the side fixing surface 31a is more likely to stay between the first core side fixing surface 22c and the first magnet side fixing surface 31a that are fixed to each other. Therefore, the rectifier magnet 18 can be fixed better with the adhesive 41.

  The first inflow recess 101 may be configured by only a pair of inclined surfaces 101a, and the cross-sectional shape orthogonal to the axial direction may be V-shaped to open to the first magnet side fixed surface 31a side. The same effect can be obtained. Further, the inner peripheral surface of the first inflow recess 101 may be formed so as to have the inclined surface 101a only at one end portion in the circumferential direction. Also, the second inflow recess 24d provided in the second core-side fixing surface 24c may have the same shape as the first inflow recess 101. In addition, the inner peripheral surface of the first inflow recess 68b of the second embodiment is formed with an inclined surface formed continuously from the first interpole magnet side fixing surface 68a and inclined with respect to the first interpole magnet side fixing surface 68a. It is good also as a structure to have. Similarly, the inner peripheral surface of the second inflow recess 69b of the second embodiment is formed continuously from the second interpole magnet side fixing surface 69a and is inclined with respect to the second interpole magnet side fixing surface 69a. It is good also as a structure which has.

  As shown in FIG. 11, instead of the first inflow recess 22d of the first embodiment, a first inflow recess 102 may be provided on the first core-side fixing surface 22c. The first inflow recess 102 has a groove shape extending along the axial direction, and is open to the first magnet side fixing surface 31a side (in the radial direction in FIG. 11). The inner peripheral surface of the first inflow recess 102 is an arc surface 102a that is formed continuously from the first core-side fixing surface 22c and is curved in an arc shape. Note that the arc surface 102a and the first core-side fixing surface 22c form an obtuse angle on the first magnet-side fixing surface 31a side to which the first core-side fixing surface 22c is fixed. In this case, the adhesive between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a fixed to each other by providing the arc surface 102a on the inner peripheral surface of the first inflow recess 102. 41 becomes easier to flow into the first inflow recess 102. Accordingly, the adhesive 41 is further prevented from leaking outside between the first core-side fixing surface 22c and the first magnet-side fixing surface 31a that are fixed to each other, and the first core-side fixing surface 22c or the first magnet is prevented. The adhesive 41 applied to the side fixing surface 31a is more likely to stay between the first core side fixing surface 22c and the first magnet side fixing surface 31a that are fixed to each other. Therefore, the rectifier magnet 18 can be fixed better with the adhesive 41.

  Note that the inner peripheral surface of the first inflow recess 102 may have an arc surface that is continuously formed from the first core-side fixing surface 22c and curved in an arc shape at at least one end in the circumferential direction. Good. In this case, it is preferable that the arc surface and the first core-side fixing surface 22c form an obtuse angle on the first magnet-side fixing surface 31a side on which the first core-side fixing surface 22c is fixed. Also, the second inflow recess 24d provided in the second core-side fixing surface 24c may have the same shape as the first inflow recess 102. Moreover, it is good also as a structure which has the circular arc surface which was formed continuously from the 1st interpole magnet side fixing surface 68a, and was curved in the circular arc shape in the 1st inflow recessed part 68b of 2nd Embodiment. Similarly, the inner peripheral surface of the second inflow recess 69b of the second embodiment may have a circular arc surface formed continuously from the second interpole magnet side fixing surface 69a and curved in an arc shape.

  In the first embodiment, the first rotor core 15 is provided with the first inflow recess 22d, and the second rotor core 16 is provided with the second inflow recess 24d. However, an inflow recess may be provided in the rectifying magnet 18. For example, as shown in FIG. 12, the first magnet-side fixing surface 31a has an inflow recess 103 that has the same shape as the first inflow recess 22d of the first embodiment and opens to the first core-side fixing surface 22c. It may be provided.

  In the second embodiment, an inflow recess may be provided in the first core side fixing surface 72c and the second core side fixing surface 82c. Moreover, you may provide an inflow recessed part in the 1st back magnet side fixing surface 66a and the 2nd back magnet side fixing surface 67a.

  In the rotor 61 of the second embodiment, the back surface 72 d of the first claw-shaped magnetic pole 72 and the first back magnet 66 may be fixed with the adhesive 41. In this case, the back surface 72d and the radially outer side surface of the first back magnet 66 are fixed surfaces that are fixed to each other by the adhesive 41. An inflow recess is provided on at least one of the radially outer side surfaces of the back surface 72d and the first back magnet 66. Similarly, the back surface 82 d of the second claw-shaped magnetic pole 82 and the second back magnet 67 may be fixed by the adhesive 41. In this case, the back surface 82d and the radially outer side surface of the second back magnet 67 are fixed surfaces that are fixed to each other by the adhesive 41. An inflow recess is provided in at least one of the radially outer side surfaces of the back surface 82 d and the second back magnet 67.

  -The place which fixes the 1st and 2nd rotor cores 15 and 16 and the rectifier magnet 18 with the adhesive agent 41 is not restricted to the place of the said 1st Embodiment. For example, in the example shown in FIG. 13, one end face in the circumferential direction of the second claw-shaped magnetic pole 24 (the end face on the counterclockwise side in FIG. 13) is fixed to the first interpole magnet portion 33. It has become. Further, the other end surface in the circumferential direction (the end surface in the clockwise direction in FIG. 13) of the first interpole magnet portion 33 is a magnet-side fixing surface 112a fixed to the core-side fixing surface 111a. Furthermore, the core-side fixing surface 111a is provided with an inflow recess 113a that opens toward the magnet-side fixing surface 112a. The core-side fixing surface 111a and the magnet-side fixing surface 112a are fixed with an adhesive 41. Further, the other end surface in the circumferential direction of the second claw-shaped magnetic pole 24 (the end surface on the clockwise side in FIG. 13) is a core-side fixing surface 111b that is fixed to the second interpole magnet portion 34. Further, one end surface in the circumferential direction (second end surface in the counterclockwise direction in FIG. 13) of the second interpole magnet portion 34 is a magnet side fixing surface 112b fixed to the core side fixing surface 111b. Furthermore, the inflow recessed part 113b opened to the magnet side fixing surface 112b side is provided in the core side fixing surface 111b. The core side fixing surface 111b and the magnet side fixing surface 112b are fixed by an adhesive 41.

  In the second embodiment, the first and second rotor cores 63 and 64 and the first and second interpole magnets 68 and 69 are fixed by the adhesive 41. However, the first and second rotor cores 63 and 64 and the first and second interpole magnets 68 and 69 are not necessarily fixed. In this case, the magnets adjacent in the circumferential direction among the first and second back magnets 66 and 67 and the first and second interpole magnets 68 and 69 are fixed by the adhesive 41. Since the first inflow recess 68b is formed in the first interpole magnet side fixing surface 68a, the first interpole magnet side fixing surface 68a and the first back magnet side fixing surface 66a that are fixed to each other are overlapped. Sometimes, the adhesive 41 interposed therebetween can flow into the first inflow recess 68b. Further, when the first inter-pole magnet side fixing surface 68a and the second back magnet side fixing surface 67a fixed to each other are superposed, the adhesive 41 interposed therebetween can flow into the first inflow recess 68b. is there. Similarly, since the second inflow recess 69b is formed in the second interpole magnet side fixing surface 69a, the second interpole magnet side fixing surface 69a and the first back magnet side fixing surface 66a fixed to each other are provided. When superposed, the adhesive 41 interposed therebetween can flow into the second inflow recess 69b. Further, when the second inter-pole magnet side fixing surface 69a and the second back magnet side fixing surface 67a fixed to each other are superposed, the adhesive 41 interposed therebetween can flow into the second inflow recess 69b. is there. Therefore, between the first interpole magnet side fixing surface 68a and the first back magnet side fixing surface 66a fixed to each other, the first interpolar magnet side fixing surface 68a and the second back magnet side fixing surface 67a fixed to each other. The adhesive 41 is prevented from leaking out from between the two. Similarly, between the second interpole magnet side fixing surface 69a and the first back magnet side fixing surface 66a fixed to each other, the second interpolar magnet side fixing surface 69a and the second back magnet side fixing surface fixed to each other. It is suppressed that the adhesive 41 leaks outside from between 67a. Therefore, between the first back magnet side fixing surface 66a and the first interpole magnet side fixing surface 68a, between the first interpole magnet side fixing surface 68a and the second back magnet side fixing surface 67a, between the second poles. The adhesive 41 is likely to stay between the magnet side fixing surface 69a and the first back magnet side fixing surface 66a and between the second interpolar magnet side fixing surface 69a and the second back magnet side fixing surface 67a. Therefore, the first and second back magnets 66 and 67 and the first and second interpole magnets 68 and 69 can be satisfactorily fixed by the adhesive 41.

  In the first embodiment, both the first rotor core 15 and the second rotor core 16 are fixed by the rectifying magnet 18 and the adhesive 41. However, only one of the first rotor core 15 and the second rotor core 16 may be fixed by the rectifying magnet 18 and the adhesive 41.

  In the first embodiment, the first rotor core 15 includes five first claw-shaped magnetic poles 22, and the second rotor core 16 includes five second claw-shaped magnetic poles 24. However, the number of claw-shaped magnetic poles 22 and 24 provided in the first and second rotor cores 15 and 16 is not limited to this, and may be changed as appropriate. In this case, according to the number of claw-shaped magnetic poles 22 and 24, the number of first and second back magnet parts 31 and 32 of the rectifier magnet 18 and the number of first and second interpole magnet parts 33 and 34 are also changed. The

  Similarly, in the second embodiment, the number of first claw-shaped magnetic poles 72 of the first rotor core 63 and the number of second claw-shaped magnetic poles 82 of the second rotor core 64 may be appropriately changed. In this case, the number of first and second back magnets 66 and 67 and the number of first and second interpole magnets 68 and 69 are changed according to the number of claw-shaped magnetic poles 72 and 82. The rotor 61 does not necessarily have to include the first and second back magnets 66 and 67.

  In the first embodiment, the rotor 11 includes only a pair of first and second rotor cores 15 and 16. However, the rotor 11 may be configured to include a plurality of pairs of the first and second rotor cores 15 and 16. In this case, the field magnets 17 are disposed between the first and second core bases 21 and 23 of the first and second rotor cores 15 and 16 that make a pair, and the rectifying magnets 18 are disposed on the outer circumferences of the field magnets 17. Is placed. Further, the pair of first and second rotor cores 15 and 16 are laminated in the axial direction. Similarly, the rotor 61 of the second embodiment may be configured to include a plurality of pairs of first and second rotor cores 63 and 64.

  -You may implement combining said 1st Embodiment, said 2nd Embodiment, and each said modification.

  5 ... stator, 11, 61 ... rotor, 15, 63 ... first rotor core, 16, 64 ... second rotor core, 17, 65 ... field magnet, 18 ... rectifier magnet, 21, 71 ... first core as a core base Base, 22, 72 ... 1st claw-shaped magnetic pole as claw-shaped magnetic pole, 22c, 72c ... 1st core side fixed surface as a fixed surface, 22d, 101, 102 ... 1st inflow recessed part as an inflow recessed part, 23, 81 2nd core base as a core base, 24, 82 ... 2nd claw-shaped magnetic pole as claw-shaped magnetic pole, 24c, 82c ... 2nd core side fixed surface as a fixed surface, 24d ... 2nd inflow recessed part as an inflow recessed part 31a: First magnet side fixing surface as a fixing surface, 32a: Second magnet side fixing surface as a fixing surface, 41: Adhesive, 66: First back magnet as a rectifying magnet, 66a: First as a fixing surface 1 back magnet side fixed surface, 7: Second back magnet as rectifier magnet, 67a: Second back magnet side fixed surface as fixed surface, 68: First interpolar magnet as rectifier magnet, 68a: First interpolar magnet side fixed as fixed surface Surface, 68b ... first inflow recess as inflow recess, 69 ... second interpolar magnet as commutation magnet, 69a ... second interpolar magnet side fixed surface as fixed surface, 69b ... second inflow recess as inflow recess , 101a ... inclined surface, 102a ... arc surface, 103 ... inflow recess, 111a, 111b ... core side fixing surface as a fixing surface, 112a, 112b ... magnet side fixing surface as a fixing surface, 113a, 113b ... inflow recess.

Claims (6)

Each has a disc-shaped core base and a plurality of claw-shaped magnetic poles arranged in the circumferential direction at the outer peripheral edge of the core base, and the claw-shaped magnetic poles are stacked in the axial direction so that the claw-shaped magnetic poles alternate in the circumferential direction. First and second rotor cores;
A magnetic pole disposed between the core base of the first rotor core and the core base of the second rotor core, wherein the claw-shaped magnetic poles of the first rotor core and the claw-shaped magnetic poles of the second rotor core are different in the circumferential direction. A field magnet magnetized in the axial direction to function as
A rotor provided with a rectifying magnet that is arranged around the claw-shaped magnetic pole on the outer periphery of the field magnet and is magnetized so that the surfaces of the same polarity as the claw-shaped magnetic poles face each other;
The claw-shaped magnetic poles and the rectifying magnets of the first and second rotor cores each have a fixed surface fixed to each other with an adhesive,
An inflow recess is provided in the fixed surface of the claw-shaped magnetic pole . The rotor according to claim 1, wherein
The rotor, wherein the inflow recess is formed in a central portion in the circumferential direction of the claw-shaped magnetic pole and extends in the axial direction. The rotor according to claim 1 or 2,
The rectifying magnet is a neodymium bonded magnet. The rotor according to any one of claims 1 to 3,
The rotor is characterized in that an inner peripheral surface of the inflow recess has an arc surface formed continuously from the fixed surface and curved in an arc shape. The rotor according to any one of claims 1 to 4,
The rotor is characterized in that the inflow recess has a groove shape extending in the axial direction from one end to the other end in the axial direction of the fixed surface. A rotor according to any one of claims 1 to 5,
A motor comprising a stator that generates a rotating magnetic field.