JP5964679B2 - Rotor and motor - Google Patents

Description

  The present invention relates to a rotor and a motor.

  The rotor used in the motor includes two rotor cores combined with each other having a plurality of claw-shaped magnetic poles in the circumferential direction, and a field magnet arranged between them, and each claw-shaped magnetic pole is alternately arranged. There is a so-called permanent magnet field rotor-type rotor that allows different magnetic poles to function (see, for example, Patent Document 1).

  And in the rotor of patent document 1, the leakage flux in a rotor is reduced because the back side auxiliary magnet adheres to the surface inside the radial direction of a claw-shaped magnetic pole.

Japanese Utility Model Publication No. 5-43749

  However, in the rotor as described above, although the leakage flux is reduced by the back auxiliary magnet, when it is commercialized, further reduction of the leakage flux is required in order to achieve higher efficiency and higher output.

  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 reduce leakage magnetic flux with a simple configuration and assembly.

According to the first aspect of the present invention, a plurality of claw-shaped magnetic poles protrude radially outward at equal intervals on the outer periphery of the substantially disk-shaped core base, and extend in the axial direction. The first and second rotor cores in which the claw-shaped magnetic poles are alternately arranged in the circumferential direction while the bases are opposed to each other are arranged between the axial directions of the core bases, and are magnetized in the axial direction. A rotor having a field magnet that causes the claw-shaped magnetic pole of the rotor core to function as a first magnetic pole and the claw-shaped magnetic pole of the second rotor core to function as a second magnetic pole, An interpole magnet provided between each circumferential direction and magnetized in the circumferential direction, and a nonmagnetic material, fitted to at least one end in the axial direction of the assembled first and second rotor cores, and the interpole magnet To regulate the outward movement of the diameter Comprising a fitting member having a engaging piece that engages, and a rear auxiliary magnet magnetized in the radial direction is provided radially inwardly of said claw-shaped magnetic poles, the back auxiliary magnets, the said back auxiliary magnet The gist is that the claw-shaped magnetic poles provided on the radially outer side are arranged between the circumferential directions of the interpole magnets adjacent to both sides in the circumferential direction .

According to this configuration, since the interpole magnets magnetized in the circumferential direction are provided between the claw-shaped magnetic poles in the circumferential direction, the leakage magnetic flux between the first claw-shaped magnetic pole and the second claw-shaped magnetic pole is reduced. be able to. Therefore, for example, high efficiency and high output can be achieved. Also, the fitting having an engagement piece which is fitted to at least one end of the assembled first and second rotor cores in the axial direction and engages in the radial direction so as to restrict the movement of the interpolar magnets outward in the radial direction. Since the member is provided, it is possible to prevent the interpole magnet from protruding outward in the radial direction with a simple configuration and assembly. Moreover, since the fitting member is made of a non-magnetic material, the fitting member does not increase the leakage magnetic flux. Further, since the back auxiliary magnet magnetized in the radial direction is provided inside the claw-shaped magnetic pole in the radial direction, the leakage magnetic flux at that portion can be reduced. As a result, for example, higher efficiency and higher output can be achieved.

The invention according to claim 2 is summarized in that, in the rotor according to claim 1, the fitting member is fitted to both axial ends of the first and second rotor cores.
According to this configuration, since the fitting members are fitted to both axial ends of the first and second rotor cores, it is possible to firmly restrict the movement of the interpolar magnets radially outward on both axial sides. For example, compared to a rotor in which the fitting member is fitted only at one end in the axial direction, the inter-pole magnet can be prevented from jumping outward in the radial direction.

The gist of the invention described in claim 3 is that, in the rotor according to claim 1, the fitting member is fitted to only one axial end of the first and second rotor cores.
According to this configuration, since the fitting member is fitted only to one end in the axial direction of the first and second rotor cores, for example, compared to a rotor in which the fitting member is fitted to both axial ends. The score can be reduced.

  According to a fourth aspect of the present invention, in the rotor according to any one of the first to third aspects, at the tip of the engagement piece, a surface on the other end side in the axial direction of the first and second rotor cores. The gist of the present invention is that an engaging claw portion is provided for engaging with the.

  According to this configuration, the engagement claw portion that engages with the surface on the other end side in the axial direction of the first and second rotor cores is provided at the tip of the engagement piece. While obtaining the effect, it is possible to prevent the fitting member from moving in the axial direction.

  According to a fifth aspect of the present invention, in the rotor according to any one of the first to fourth aspects, the distance from the axial center of the radially outer end of the engagement piece is the radial direction of the claw-shaped magnetic pole. The gist is that the distance is set to be equal to or less than the distance from the axial center of the outer end portion.

  According to this configuration, the distance from the axial center of the radially outer end of the engaging piece is set to be equal to or less than the distance from the axial center of the radially outer end of the claw-shaped magnetic pole. It does not protrude outward in the radial direction from the magnetic pole. Therefore, for example, the engagement piece does not widen the air gap with the stator provided on the radially outer side of the rotor.

  According to a sixth aspect of the present invention, in the rotor according to any one of the first to fifth aspects, the fitting member is engaged in the axial direction so as to restrict the axial movement of the interpole magnet. The gist is to have an inter-pole axial engagement portion.

  According to the same configuration, the fitting member has the inter-pole axial engagement portion that engages in the axial direction so as to restrict the movement of the inter-pole magnet in the axial direction. A simple configuration and assembly can prevent the interpole magnet from protruding in the axial direction.

In the invention described in claim 7, engaging in the rotor according to any one of claims 1 to 6, prior Symbol fitting member is axially so as to restrict the axial movement of the rear auxiliary magnet The gist of the present invention is to have a rear axial direction engaging portion.

According to this configuration, fitting Chakubuzai is because it has a rear axial engagement portion engaged with the axial direction so as to restrict the axial movement of the rear auxiliary magnets, without requiring addition of further components, easy With the simple structure and assembly, the back auxiliary magnet can be prevented from protruding in the axial direction.

  According to an eighth aspect of the present invention, in the rotor according to any one of the first to seventh aspects, the engagement piece is formed so as to cover the entire outer surface in the radial direction of the interpole magnet. The gist.

  According to the same configuration, the engagement piece is formed so as to cover the entire surface on the outer side in the radial direction of the interpole magnet. For example, even if the interpole magnet is damaged, the engagement piece does not protrude outward in the radial direction. Can be prevented.

  According to a ninth aspect of the present invention, in the rotor according to any one of the first to eighth aspects, the fitting member is formed on a part of a portion facing the axial end surfaces of the first and second rotor cores. The gist is to have holes.

According to this configuration, since the fitting member has a hole in a part of the portion facing the axial end surfaces of the first and second rotor cores, an increase in the weight of the rotor due to the fitting member can be suppressed.
According to a tenth aspect of the present invention, in the rotor according to any one of the first to ninth aspects, the engagement piece has a circumferential end portion engaged with the claw-shaped magnetic pole in the radial direction. The gist is that movement to the outside in the direction is restricted.

  According to this configuration, the engagement piece has its circumferential end engaged with the claw-shaped magnetic pole in the radial direction to restrict the movement outward in the radial direction. Can be firmly restricted, and the inter-pole magnet can be prevented from jumping outward in the radial direction.

The invention according to claim 11 is summarized in a motor provided with the rotor according to any one of claims 1 to 10.
According to this configuration, the effect of the invention according to any one of claims 1 to 10 can be obtained in the motor.

  ADVANTAGE OF THE INVENTION According to this invention, the rotor and motor which can reduce a magnetic flux leakage with a simple structure and assembly can be provided.

Sectional drawing of the motor in one Embodiment. The perspective view of the rotor in one Embodiment. The partial exploded perspective view of the rotor in one embodiment. Sectional drawing of the rotor in one Embodiment. Sectional drawing of the rotor in one Embodiment. The perspective view of the rotor in another example. The partial exploded perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The perspective view of the rotor in another example. The partial exploded perspective view of the rotor in another example. The perspective view of the rotor in another example. The partial exploded perspective view of the rotor in another example. The partial exploded perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The partial exploded perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The partial exploded perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The partial exploded perspective view of the rotor in another example. The partial cross section top view of the rotor in another example. Sectional drawing of the rotor in another example. The partial exploded perspective view of the rotor in another example. Sectional drawing of the rotor in another example. The perspective view of the rotor in another example. The partial exploded perspective view of the rotor in another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a motor case 2 of a motor 1 closes 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. A circuit housing box 5 that houses a power 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.

  As shown in FIGS. 2 to 5, the rotor 11 includes two pairs of first and second rotor cores 21 and 22, an annular magnet 23 (see FIGS. 4 and 5) as a field magnet, and a back auxiliary magnet. First and second back auxiliary magnets 24 and 25 (see FIGS. 3 and 4), first and second interpole magnets 26 and 27 (see FIG. 3) as interpole magnets, and a pair of fitting members 28, 29.

  The first rotor core 21 has a plurality of first claw-shaped magnetic poles 21b as claw-shaped magnetic poles (five in the present embodiment) at equal intervals on the outer periphery of the first core base 21a as a substantially disk-shaped core base. It 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 width (angle) of each first claw-shaped magnetic pole 21b, that is, the width (angle) of the circumferential end faces 21c and 21d is the width of the gap between the first claw-shaped magnetic poles 21b adjacent in the circumferential direction ( (Angle) is set smaller. The first claw-shaped magnetic pole 21b is formed in a rectangular shape when viewed from the outside in the radial direction.

  The second rotor core 22 has the same shape as the first rotor core 21, and a plurality of the second rotor cores 22 are arranged at equal intervals on the outer periphery of a second core base 22a (see FIG. 4) as a substantially disk-shaped core base. The second claw-shaped magnetic pole 22b as a claw-shaped magnetic pole in the form protrudes radially outward and extends in the axial direction. In addition, the circumferential end faces 22c and 22d of the second claw-shaped magnetic pole 22b are flat surfaces extending in the radial direction (not inclined with respect to the radial direction when viewed from the axial direction), and the second claw-shaped magnetic pole 22b is orthogonal to the axis. The direction cross section has a fan shape. Further, the circumferential width (angle) of each second claw-shaped magnetic pole 22b, that is, the width (angle) of the circumferential end faces 22c, 22d is the width of the gap between the second claw-shaped magnetic poles 22b adjacent in the circumferential direction ( (Angle) is set smaller. The second claw-shaped magnetic pole 22b is formed in a rectangular shape when viewed from the outside in the radial direction. The second rotor core 22 is disposed between the first claw-shaped magnetic poles 21b corresponding to the second claw-shaped magnetic poles 22b (that is, alternately in the circumferential direction with the first claw-shaped magnetic poles 21b). As shown in FIG. 4, the annular magnet 23 is assembled (attached) to the first rotor core 21 so as to be disposed (sandwiched) between the axial directions of the first core base 21a and the second core base 22a facing each other. At this time, a rectangular groove is formed between the first claw-shaped magnetic pole 21b and the second claw-shaped magnetic pole 22b in the circumferential direction when viewed from the outside in the radial direction.

  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 functions as the first magnetic pole (N pole in 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 this embodiment).

  As shown in FIG. 4, a first back auxiliary magnet 24 is disposed between the back surface (radially inner surface) of each first claw-shaped magnetic pole 21b and the outer peripheral surface of the second core base 22a. Yes. The first back auxiliary magnet 24 has a substantially rectangular parallelepiped shape in which the cross section in the direction perpendicular to the axis has a fan shape, and the side contacting the back surface of the first claw-shaped magnetic pole 21b is the first claw-shaped in order to reduce the leakage magnetic flux at that portion. The N pole having the same polarity as the magnetic pole 21b is magnetized in the radial direction so that the side in contact with the second core base 22a becomes the S pole having the same polarity as the second core base 22a.

  Further, as shown in FIGS. 3 and 4, the second back auxiliary magnet 25 is provided between the back surface (radially inner surface) of each second claw-shaped magnetic pole 22b and the outer peripheral surface of the first core base 21a. Is arranged. The second back auxiliary magnet 25 has a substantially rectangular parallelepiped shape in which the cross section in the direction perpendicular to the axis has a fan shape, and the side contacting the back surface of the second claw-shaped magnetic pole 22b is the second claw-shaped in order to reduce the leakage magnetic flux at that portion. The S pole having the same polarity as the magnetic pole 22b is magnetized in the radial direction so that the side in contact with the first core base 21a becomes the N pole having the same polarity as the first core base 21a.

  Further, as shown in FIG. 4, the first back auxiliary magnet 24 and the second back auxiliary magnet 25 overlap each other in the axial direction at the axial position where the annular magnet 23 is arranged. It is set so as to be arranged also at the arranged axial position.

  As described above, a pair of intermediate members W constituted by the first and second rotor cores 21 and 22, the annular magnet 23, and the first and second back auxiliary magnets 24 and 25 are provided, and they are axially arranged. Are laminated so as to be symmetrical (see FIG. 4).

  And between the circumferential direction of the 1st claw-shaped magnetic pole 21b and the 2nd claw-shaped magnetic pole 22b, the 1st and 2nd interpole magnets 26 and 27 are arrange | positioned. Specifically, the axial lengths of the first and second interpole magnets 26 and 27 of the present embodiment are set to twice the axial length of the first and second claw-shaped magnetic poles 21b and 22b. ing. The first and second interpole magnets 26 and 27 have a substantially rectangular parallelepiped shape in which the cross section in the direction perpendicular to the axis is a fan shape. 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 the circumferential end surface of the first back auxiliary magnet 24, and a second claw-shaped magnetic pole 22b. Between the other circumferential end surface 22d and the flat end surface formed by the circumferential end surface of the second back auxiliary magnet 25. The second interpole magnet 27 of the present embodiment includes a flat surface formed by the other circumferential end surface 21d of the first claw-shaped magnetic pole 21b and the circumferential end surface of the first back auxiliary magnet 24, and The two claw-shaped magnetic poles 22b are arranged between one circumferential end surface 22c and a flat surface formed by the circumferential end surface of the second back auxiliary magnet 25. The first and second interpole magnets 26 and 27 have the same magnetic pole as that of the first and second claw-shaped magnetic poles 21b and 22b (the first claw-shaped magnetic pole 21b side is the N pole, and the second claw-shaped magnet It is magnetized in the circumferential direction (so that the magnetic pole 22b side becomes the S pole).

Then, fitting members 28 and 29 are fitted to both ends in the axial direction of the first and second rotor cores 21 and 22 in the member assembled as described above.
The fitting members 28 and 29 are made of a non-magnetic material (in this embodiment, a resin material), and have disk portions 28a and 29a having a central hole through which the rotary shaft 12 passes, and the disk portions 28a and 29a. A plurality of (10 in the present embodiment) engagement pieces 28b and 29b in the circumferential direction extending in the axial direction from the outer edge of the.

  More specifically, the outer diameters of the disk portions 28a and 29a are connected to the outer diameters of the first and second rotor cores 21 and 22 (specifically, the radially outer ends of the first and second claw-shaped magnetic poles 21b and 22b). It is set to be the same as the diameter of the circle. The disc portions 28a and 29a are arranged so as to abut against both axial ends of the first and second rotor cores 21 and 22 assembled as described above. Further, as shown in FIG. 4, the disk portions 28 a and 29 a of the present embodiment have axial end surfaces (exposed surfaces) of the second back auxiliary magnet 25 to restrict the movement of the second back auxiliary magnet 25 in the axial direction. ) Constitutes a rear axial engagement portion that abuts (engages) in the axial direction. Further, as shown in FIG. 5, the disk portions 28a and 29a of the present embodiment include first and second interpole magnets for restricting the movement of the first and second interpole magnets 26 and 27 in the axial direction. An axial interengagement portion that contacts (engages) the axial end surfaces of 26 and 27 in the axial direction is also configured.

  The engagement pieces 28b and 29b are in contact with the first and second interpole magnets 26 and 27 in the radial direction so as to restrict the movement of the first and second interpole magnets 26 and 27 outward in the radial direction. A). Specifically, the engagement pieces 28b and 29b have a constant axial cross section in the axial direction, and the outer peripheral surfaces of the first and second interpole magnets 26 and 27 as viewed from the axial direction (specifically, arc-shaped radial outer sides). It is formed in an arc shape along the end face. The distance from the axial center of the radially outer end face of the engagement pieces 28b, 29b is set to be the same as the distance from the axial center of the radially outer end face of the first and second claw-shaped magnetic poles 21b, 22b. It is set so that one circle is formed by the radially outer end surfaces of the engaging pieces 28b and 29b and the radially outer end surfaces of the first and second claw-shaped magnetic poles 21b and 22b. Further, the axial lengths of the engagement pieces 28b and 29b of the present embodiment are set to about 1/5 of the axial length of the first and second interpole magnets 26 and 27.

  And, as shown in FIGS. 2, 4 and 5, the fitting members 28, 29 are press-fitted and fixed to the center holes of the disk portions 28a, 29a and the rotary shaft 12, so that the first and second members The members composed of the rotor cores 21 and 22 are fitted to both ends in the axial direction.

Next, the operation of the motor 1 configured as described above will be described.
In the rotor 11, the first and second back auxiliary magnets 24, 25 and the first and second interpole magnets 26, 27 are provided, so that the leakage magnetic flux is reduced at the respective arrangement locations, and the annular magnet 23 is eventually formed. Can be effectively used for the output of the motor 1. In addition, a large centrifugal force is applied to the first and second interpole magnets 26 and 27 when the rotor 11 rotates, but the first and second interpole magnets are engaged by engaging the engagement pieces 28b and 29b in the radial direction. Jumping out of 26 and 27 to the radial outside is prevented.

Next, the characteristic effects of the above embodiment will be described below.
(1) Since the first and second interpole magnets 26 and 27 magnetized in the circumferential direction are provided between the first and second claw-shaped magnetic poles 21b and 22b in the circumferential direction, the first claw-shaped magnetic pole 21b is provided. And the magnetic flux leakage between the second claw-shaped magnetic poles 22b can be reduced. Therefore, the magnetic flux of the annular magnet 23 can be effectively used for the output of the motor 1. For example, high efficiency and high output can be achieved. In addition, the first and second rotor cores 21 and 22 that are assembled are fitted to both ends in the axial direction and have engagement pieces 28b and 29b that engage with the first and second interpole magnets 26 and 27 in the radial direction. Since the pair of fitting members 28 and 29 are provided, it is possible to prevent the first and second interpole magnets 26 and 27 from protruding outward in the radial direction with a simple configuration and assembly. Moreover, since the fitting members 28 and 29 are made of a non-magnetic material, the fitting members 28 and 29 do not increase the leakage magnetic flux.

  (2) The distance from the axial center of the radially outer end face of the engagement pieces 28b, 29b is set to be the same as the distance from the axial center of the radially outer end face of the first and second claw-shaped magnetic poles 21b, 22b. Therefore, the engagement pieces 28b and 29b do not protrude radially outward from the first and second claw-shaped magnetic poles 21b and 22b. Therefore, for example, the engagement pieces 28 b and 29 b do not widen the air gap with the stator 6 provided on the radially outer side of the rotor 11.

  (3) The fitting members 28 and 29 are arranged axially with the axial end surfaces of the first and second interpole magnets 26 and 27 so as to restrict the axial movement of the first and second interpole magnets 26 and 27. It has disk parts 28a and 29a which constitute the axial direction engaging part between poles which contact (engage). Therefore, the first and second interpole magnets 26 and 27 can be prevented from protruding in the axial direction with a simple configuration and assembly without the need for additional parts.

  (4) The fitting members 28 and 29 abut (engage) with the axial end face (exposed surface) of the second back auxiliary magnet 25 in the axial direction so as to restrict the movement of the second back auxiliary magnet 25 in the axial direction. Disk portions 28a and 29a constituting the rear axial direction engaging portion. Therefore, the second back auxiliary magnet 25 can be prevented from jumping out in the axial direction with a simple configuration and assembly without requiring the addition of further components.

  (5) Since the fitting members 28 and 29 are fitted to both axial ends of the first and second rotor cores 21 and 22, the first and second interpole magnets 26 and 27 are firmly attached to both axial ends. Movement to the outside in the radial direction can be restricted. Therefore, for example, the first and second interpole magnets 26 and 27 can be further prevented from protruding outward in the radial direction as compared with the rotor in which the fitting member is fitted only at one end in the axial direction.

The above embodiment may be modified as follows.
In the above-described embodiment, the engagement pieces 28b and 29b are arc-shaped when viewed from the axial direction and the cross section in the direction perpendicular to the axis is constant in the axial direction. However, the present invention is not limited to this. You may change as shown in FIG.

  Specifically, in this example (see FIGS. 6 to 8), as shown in FIGS. 7 and 8, the first and second interpole magnets 26 and 27 are chamfered at the radially outer ends at both axial ends. Portions 26a and 27a are formed. And as shown in FIG.7 and FIG.8, the engagement pieces 31 and 32 of this example (refer FIGS. 6-8) incline with respect to the axial direction so that the said chamfer part 26a, 27a may surface-contact. It has the inclined surfaces 31a and 32a. Even if it does in this way, the effect similar to the effect of the said embodiment can be acquired. Moreover, if it does in this way, the rigidity of the engagement pieces 31 and 32 can be improved easily.

  In the above embodiment, the axial lengths of the engagement pieces 28b and 29b are set to about 1/5 of the axial length of the first and second interpole magnets 26 and 27. It is not limited, For example, you may change as shown in FIG.9 and FIG.10.

  The engaging pieces 33 and 34 in this example (see FIGS. 9 and 10) have respective axial lengths so as to cover the entire outer surfaces of the first and second interpole magnets 26 and 27 in the radial direction. It is set to ½ of the axial length of the first and second interpole magnets 26 and 27. If it does in this way, even if the 1st and 2nd interpole magnets 26 and 27 are damaged, the jumping out to the radial direction outer side of the fragment can be prevented.

  -You may form a hole in a part of disc part 28a, 29a in the fitting members 28 and 29 of the said embodiment. For example, as shown in FIGS. 11 and 12, a plurality (four in this example) of holes 35 may be formed in the disk portions 28a and 29a at equal angular intervals. If it does in this way, the increase in the weight of the rotor 11 by the fitting members 28 and 29 can be suppressed.

  Further, for example, as shown in FIGS. 13 and 14, the distance between the poles 28 a and 29 a is in contact (engaged) with the axial end surfaces of the first and second interpole magnets 26 and 27 in the axial direction. The hole 38 is formed so as to form an axial engagement portion 36 and a back axial engagement portion 37 that abuts (engages) in the axial direction with the axial end surface (exposed surface) of the second back auxiliary magnet 25. May be formed. If it does in this way, the increase in the weight of the rotor 11 by the fitting members 28 and 29 can be suppressed, obtaining the effect similar to the effect (3) of the said embodiment, and (4).

  In the above embodiment, the fitting members 28 and 29 are fitted to both ends in the axial direction of the assembled first and second rotor cores 21 and 22. However, the present invention is not limited to this, and FIGS. As shown in FIG. 4, the rotor 11 may be embodied as the fitting member 41 fitted to only one axial end of the assembled first and second rotor cores 21 and 22.

  Specifically, the fitting member 41 of this example (see FIGS. 15 and 16) is made of a non-magnetic material (in this example, stainless steel (SUS)), and has a circle with a central hole through which the rotating shaft 12 passes. A plate portion 41a and a plurality (ten in this example) of engaging pieces 41b are provided in the circumferential direction extending in the axial direction from the outer edge of the disc portion 41a. The axial length of the engaging piece 41b in this example is set to be the same as the axial length of the first and second interpole magnets 26 and 27. That is, the shape of the fitting member 41 in this example is substantially the same as the fitting member 28 in the above embodiment, but only the length of the engaging piece 41b (different from the engaging piece 28b in the above embodiment) is different. It is said that.

If it does in this way, compared with the rotor 11 (refer FIG. 2) of the said embodiment, a number of parts can be decreased, for example.
Also, for example, as shown in FIGS. 17 and 18, the engaging piece 41b of the other example (see FIGS. 15 and 16) is further extended, and the first and second rotor cores are provided at the tip of the engaging piece 41b. An engaging claw portion 41c that engages with the surface on the other end side in the axial direction of 21 and 22 (the surface on the other end side in the first and second interpole magnets 26 and 27 in this example) may be provided. The engaging claw portion 41c in this example has a shape that extends straight (not bent) from the engaging piece 41b before being assembled, and is bent after the arrangement and bent at a right angle from the engaging piece 41b. It is said. In addition, although the engaging claw part 41c in the state before the assembly has a shape extending straight from the engaging piece 41b, in FIG. 17, for the sake of convenience, the engaging claw part 41c is bent at a right angle from the engaging piece 41b. Is illustrated.

  If it does in this way, it can prevent that the fitting member 41 moves to an axial direction, ie, the assembly | attachment with respect to the 1st and 2nd rotor cores 21 and 22 is cancelled | released. Further, in this example, the engaging claw portion 41c is connected to the other axial end surfaces of the first and second interpole magnets 26 and 27 so as to restrict the movement of the first and second interpole magnets 26 and 27 in the axial direction. An inter-pole axial engagement portion that abuts (engages) in the axial direction is configured to prevent the first and second inter-pole magnets 26 and 27 from protruding in the axial direction while reducing the number of parts. it can.

  In the above embodiment, ten engagement pieces 28b, corresponding to the number of first and second interpole magnets 26, 27 from the outer edge of each disk portion 28a, 29a in each fitting member 28, 29, respectively. However, the present invention is not limited to this, and may be changed as shown in FIGS. 19 and 20, for example.

  In this example (FIGS. 19 and 20), five engagement pieces 28c and 29c are formed at equal angular intervals from the outer edges of the disk portions 28a and 29a of the fitting members 28 and 29, respectively. That is, one engagement member 28 is formed with an engagement piece 28c corresponding to the first interpole magnet 26, and the other attachment member 29 is provided with an engagement piece 29c corresponding to the second interpole magnet 27. Is formed. Further, the engagement pieces 28c, 29c are engaged with the other end side surfaces in the axial direction of the first and second rotor cores 21, 22 (in this example, the far side surfaces of the disk portions 28a, 29a). Engaging claw portions 28d and 29d are provided. The engaging claw portions 28d and 29d in this example have a shape that extends straight (without being bent) from the engaging pieces 28c and 29c before being assembled, and are bent after the arrangement and are bent to be engaged with the engaging pieces 28c and 29c. The shape is bent at a right angle. Note that the engaging claws 28d and 29d in a state before assembly are straightly extended from the engaging pieces 28c and 29c. However, in FIG. 19, the engaging claws 28d and 29d are connected to the engaging pieces 28c and 29c for convenience. The state bent at a right angle from 29c is illustrated.

  Even in this case, the first and second interpole magnets 26 and 27 can be prevented from jumping outward in the radial direction and axially jumping out with a simple configuration and assembly. Further, it is possible to prevent the fitting members 28 and 29 from moving in the axial direction, that is, the assembly of the first and second rotor cores 21 and 22 from being released.

  -Although the engagement pieces 28b and 29b of the said embodiment had the possibility that the front-end | tip might bend to radial direction outer side, as shown in FIGS. 21-23, the circumferential direction edge part is said 1st and 2nd. You may change to the engagement pieces 28e and 29e which engage with the claw-shaped magnetic poles 21b and 22b in the radial direction and are restricted from moving outward in the radial direction.

  That is, in this example (FIGS. 21 to 23), the engagement pieces 28e, 29e have a wider width (angle) in the circumferential direction than the engagement pieces 28b, 29b of the above embodiment, in other words, the first and second The width (angle) in the circumferential direction is wider than the outer peripheral surfaces of the interpolar magnets 26 and 27. Further, the first and second claw-shaped magnetic poles 21b and 22b have grooves 21e, into which the circumferential end portions projecting in the circumferential direction from the first and second interpole magnets 26 and 27 in the engaging pieces 28b and 29b are fitted. 22e is formed. As a result, the engagement end pieces 28e and 29e engage in the radial direction with the first and second claw-shaped magnetic poles 21b and 22b (grooves 21e and 22e) in the circumferential direction, and move outward (bend). ) Is regulated. Therefore, the movement of the first and second interpole magnets 26 and 27 to the outside in the radial direction can be firmly restricted, and the first and second interpole magnets 26 and 27 can be prevented from jumping out to the outside in the radial direction. can do.

  -Although the 1st and 2nd interpole magnets 26 and 27 of the said embodiment set it as the shape which has a 1st and 2nd core base 21a, 22a and a radial gap in the assembly | attachment state, it shows to FIG.24 and FIG.25 In this manner, the first and second core bases 21a and 22a may be changed to the first and second interpole magnets 51 and 52 having a shape in contact with the radial direction. Of course, in another example, the first and second interpole magnets 51 and 52 may be changed.

  The inter-pole axial engagement portions 36 in the disk portions 28a and 29a of the above-described another example (see FIGS. 13 and 14) are part of the axial end surfaces of the first and second inter-pole magnets 26 and 27 and the shaft. The shape is configured to abut (engage) in the direction, but as illustrated in FIGS. 26 and 27, the entire surface of the axial end surfaces of the first and second interpole magnets 26, 27 is abutted (engaged) in the axial direction. ) May be changed to the inter-pole axial engagement portion 61.

  In other words, the disk portions 28a and 29a in this example have an inter-pole axial engagement portion 61 that abuts (engages) the entire axial end surfaces of the first and second inter-pole magnets 26 and 27 in the axial direction. And the hole 62 is formed so that the axial direction end surface (exposed surface) of the 2nd back surface auxiliary magnet 25 and the back surface direction engaging part 37 which contact | abuts (engages) to an axial direction may be formed.

If it does in this way, even if the 1st and 2nd interpole magnets 26 and 27 are damaged, for example, the protrusion of the broken piece in the axial direction can be prevented.
In the above embodiment, the fitting members 28 and 29 are fitted by the center holes of the disk portions 28a and 29a and the rotary shaft 12 being press-fitted and fixed. The engaging pieces 28b and 29b may be fitted by being press-fitted and fixed between the first and second claw-shaped magnetic poles 21b and 22b.

  In the above embodiment, the fitting members 28 and 29 are made of a resin material, but are not limited to this, and may be made of other nonmagnetic materials. For example, it may be made of stainless steel, copper, copper alloy, aluminum, aluminum alloy, or the like.

  In the above-described embodiment, the rotor 11 in which a pair of intermediate members W constituted by the first and second rotor cores 21 and 22, the annular magnet 23, and the first and second back auxiliary magnets 24 and 25 are laminated is concretely described. However, the present invention is not limited to this, and may be embodied in a rotor in which the intermediate member W is not stacked.

  In the above embodiment, the rotor 11 includes the back auxiliary magnets (the first and second back auxiliary magnets 24 and 25). However, the present invention is not limited to this, and the rotor may be replaced with a rotor that does not include the back auxiliary magnet. Good.

  DESCRIPTION OF SYMBOLS 11 ... Rotor, 21 ... 1st rotor core, 21a ... 1st core base (core base), 21b ... 1st claw-shaped magnetic pole (claw-shaped magnetic pole), 22 ... 2nd rotor core, 22a ... 2nd core base (core base) 22b ... second claw-shaped magnetic pole (claw-shaped magnetic pole), 23 ... annular magnet (field magnet), 24 ... first back auxiliary magnet (back auxiliary magnet), 25 ... second back auxiliary magnet (back auxiliary magnet), 26, 51 ... first interpole magnet (interpole magnet), 27, 52 ... second interpole magnet (interpole magnet), 28, 29, 41 ... fitting member, 28a, 29a, 41a ... disc portion ( 28b, 28c, 28e, 29b, 29c, 29e, 31-34, 41b ... engaging pieces, 28d, 29d, 41c ... engaging claws, 35 , 38, 62... Hole, 36, 61... Engaging claw portion forming part, 41c ... the inter-electrode axial engaging portion.

Claims (11)

A plurality of claw-shaped magnetic poles project radially outward and extend in the axial direction on the outer periphery of each substantially disk-shaped core base, and the claw-shaped magnetic poles are formed with the core bases facing each other. First and second rotor cores arranged alternately in the circumferential direction;
The claw-shaped magnetic poles of the first rotor core function as the first magnetic poles by being arranged between the axial directions of the core bases and magnetized in the axial direction, and the claw-shaped magnetic poles of the second rotor core are made to function as the first magnetic poles. A rotor including a field magnet that functions as a second magnetic pole,
An interpole magnet provided between the claw-shaped magnetic poles in the circumferential direction and magnetized in the circumferential direction;
An engagement made of a non-magnetic material and fitted to at least one end of the assembled first and second rotor cores in the axial direction so as to restrict the movement of the interpolar magnets radially outward A fitting member having a piece ;
A back auxiliary magnet provided radially inside the claw-shaped magnetic pole and magnetized in the radial direction ;
The rotor, wherein the back auxiliary magnet is disposed between the circumferential directions of the interpole magnets adjacent to both sides in the circumferential direction of the claw-shaped magnetic poles provided on the radially outer side of the back auxiliary magnet . The rotor according to claim 1, wherein
The rotor, wherein the fitting members are fitted to both axial ends of the first and second rotor cores. The rotor according to claim 1, wherein
The rotor, wherein the fitting member is fitted to only one axial end of the first and second rotor cores. The rotor according to any one of claims 1 to 3,
A rotor characterized in that an engagement claw portion that engages with a surface on the other end side in the axial direction of the first and second rotor cores is provided at a tip of the engagement piece. The rotor according to any one of claims 1 to 4,
The rotor, wherein a distance from the axial center of the radially outer end of the engagement piece is set to be equal to or less than a distance from the axial center of the radially outer end of the claw-shaped magnetic pole. The rotor according to any one of claims 1 to 5,
The rotor according to claim 1, wherein the fitting member has an inter-pole axial engagement portion that engages in the axial direction to restrict the axial movement of the inter-pole magnet. The rotor according to any one of claims 1 to 6,
Before SL fitting member, rotor, characterized in that it comprises a rear axial engagement portion engaged with the axial direction so as to restrict the axial movement of the rear auxiliary magnets. The rotor according to any one of claims 1 to 7,
The rotor is characterized in that the engaging piece is formed so as to cover the entire surface on the radially outer side of the interpole magnet. The rotor according to any one of claims 1 to 8,
The rotor, wherein the fitting member has a hole in a part of a portion thereof facing the axial end surfaces of the first and second rotor cores. The rotor according to any one of claims 1 to 9,
The engagement piece has a circumferential end that engages with the claw-shaped magnetic pole in the radial direction and is restricted from moving radially outward.   A motor comprising the rotor according to claim 1.