JP2001136693A - Claw pole type rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the assembly work of a permanent magnet or the like. SOLUTION: This claw pole type rotating machine includes a rotor 100 and a stator 30. The rotor 100 includes a core 50 that is interlocked to a rotary shaft 40, a first magnetic pole body 70 that is provided in the core 50 and at the same time is equipped with first claws 74, a permanent magnet 63 that is provided between the core 50 and the first magnetic pole body 70, and a second magnetic pole body 80 that is adjacent to the core 50, is interlocked to the rotary shaft 40, and is equipped with second claws 84. A permanent magnet assembly 60 is provided between the core 50 and the first magnetic pole body 70. The permanent magnet assembly 60 is formed integrally by inside and outside protection cases 61 and 62 and permanent magnet 63 being fitted between both cases 61 and 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine which is a generator or an electric motor, and more particularly to a rotor having a rotating shaft integrally mounted thereon and a stator arranged so as to cover an outer peripheral surface of the rotor with a gap. Wherein the rotor includes an iron core connected to the rotation shaft, a first magnetic pole body disposed radially outside the iron core and having a plurality of first claws, and a rotor between the iron core and the first magnetic pole body. And a second pole body adjacent to the iron core and connected to the rotating shaft and having a plurality of second claws, each of the first and second claws extending in a circumferential direction. The present invention relates to a claw-pole type rotating machine arranged alternately.

[0002]

2. Description of the Related Art One specific example of a rotating machine which is a so-called claw-pole type generator or motor is a rotor having a rotating shaft integrally mounted thereon, and a rotating shaft on both sides in the axial direction of the rotor. The case includes a case including one end wall and the other end wall supported via bearings so as to be relatively rotatable, and a stator supported in the case and arranged to cover an outer peripheral surface of the rotor with a gap. Slots extending in the axial direction are formed at intervals in the circumferential direction in the substantially cylindrical stator, and a winding made of a bundle of copper wires is inserted and held in each of the slots.

The rotor has a cylindrical iron core connected to the rotating shaft. The outer peripheral surface of the iron core is formed so as to form a regular polyhedron (regular polygon), generally a regular octahedron (regular octagon). A first magnetic pole body is disposed radially outside the outer peripheral surface of the iron core. The first magnetic pole body is formed so as to protrude outward in the radial direction from an outer peripheral portion of the base portion and to extend in the axial direction at intervals in the circumferential direction, the cylindrical base portion having a mounting hole having a circular inner peripheral surface. A plurality of first claws. A plurality of permanent magnets are inserted (press-fitted) into an annular gap formed between the outer peripheral surface of the iron core and the inner peripheral surface of the mounting hole at the base of the first magnetic pole body. Each of the permanent magnets is formed such that its cross-sectional shape and planar shape are each rectangular. Each of the permanent magnets is disposed such that each radially inner flat surface is in close contact with each of the surfaces forming the polygon in the iron core, and each of the permanent magnets has a radially outer flat surface and the first magnetic pole body. In each of the gaps formed between the base portion and the inner peripheral surface of the mounting hole, a spacer having a substantially semicircular cross section is interposed in close contact. The rotating shaft is provided with an iron core formed adjacent to the iron core (via a yoke connected to the rotating shaft adjacent to the iron core or extending axially beyond the base of the first magnetic pole body). The second pole body is connected (directly adjacent). The second magnetic pole body includes an annular substrate portion and a plurality of second claws protruding radially outward from an outer peripheral portion of the substrate portion and extending in an axial direction (a first magnetic pole body direction) at intervals in a circumferential direction. ing. The first claw of the first magnetic pole body and the second claw of the second magnetic pole body are alternately arranged with a gap in the circumferential direction and the axial direction. The rotating shaft has an annular side plate adjacent to the iron core, each of the permanent magnets, each of the spacers, and one axial side of the first magnetic pole body (one axially opposite side of the second magnetic pole body). The side plate is connected to the first magnetic pole body by a plurality of knock pins such that the side plate cannot rotate relative to the first magnetic pole body.

[0004] Each of the permanent magnets disposed on the rotor is made of a ferromagnetic material having a strong magnetic force, for example, Nd-Fe.
Since the rotor is made of a rare earth material such as -B, even when the rotor is stopped, magnetic leakage to the periphery thereof, especially to both sides of the rotor, occurs. For this reason, when the rotor is configured to be exposed to the outside in a bare state, dust such as iron powder is adsorbed by the rotor or the stator, causing a problem that the performance of the rotating machine is deteriorated. In particular, dust such as iron powder is defined by the outer peripheral surface of the rotor, and more specifically, the outer peripheral surface defined by the radially outer arc surface of each of the first claw of the first magnetic pole body and the second claw of the second magnetic pole body. If it is adsorbed and penetrated into the gap (air gap) between the motor and the stator, the magnetic force is reduced and the possibility of significantly lowering the durability is increased. In order to prevent such a problem, in the rotating machine, a space substantially sealed by each of the bearings and the case is formed so that the rotor including each of the permanent magnets and the winding portion of the stator are substantially sealed. It is configured to be accommodated in the space defined.

[0005]

In the above-described conventional claw-pole type rotating machine, as described above, each of the plurality of permanent magnets in the rotor is formed on each of the surfaces forming the polygon on the outer peripheral surface of the iron core. And the inner peripheral surface of the mounting hole in the first magnetic pole body is inserted and held through each of the spacers, so that each of the permanent magnets is inserted between the iron core and the first magnetic pole body. It is impossible to magnetize it while it is mounted on the device. For this reason, each of the permanent magnets must be press-fitted between the iron core and the first magnetic pole body via each of the spacers after being magnetized in advance. Each of the permanent magnets
In the case where the permanent magnet is made of a ferromagnetic material, for example, a rare earth material such as Nd-Fe-B described above, the permanent magnet having a strong magnetic force is replaced by one due to the strong magnetic force of each permanent magnet. It is extremely difficult to perform press-fitting work (assembly work) for press-fitting each of the above-mentioned gaps via a spacer, and the assembling work burden is large, and the assembling work time becomes excessively long. On the other hand, each of the permanent magnets is relatively easy to break because it is integrally formed by sintering metallurgy, and therefore breaks when it is forcibly pressed in due to the fact that the press-in operation is extremely difficult as described above. The likelihood increases. as a result,
The claw-pole type rotating machine including the rotor of the above-described form,
It cannot be mass-produced at low cost.

In the conventional claw-pole type rotating machine, the rotor including the permanent magnet and the winding portion of the stator are configured to be housed in the substantially sealed space as described above. As a result, it is difficult to effectively release the heat generated by the current flowing through the winding to the outside, and the temperature in the sealed space may rise excessively. As a result, problems such as an increase in electrical resistance due to an abnormal temperature rise of the windings, deterioration of the insulating member, a decrease in the magnetic force of the permanent magnet, a decrease in the lubrication performance of each bearing, and the like occur, and the rotating machine is a generator. In such a case, the power generation efficiency is reduced, and when the rotating machine is an electric motor, the output is reduced. For example, there is a possibility that the performance of the rotating machine is reduced, and the durability and reliability are also reduced. For this reason, when the rotating machine is a small generator having a relatively small amount of power generation or a small motor having a relatively low output, a place having a relatively low ambient temperature is selected and installed, or a relatively good ventilation is provided. It is necessary to select a suitable place for installation, and the installation place is restricted, which is inconvenient for practical use. On the other hand, when the rotating machine is a large generator having a relatively large power generation or a large motor having a relatively high output, forced cooling (water cooling) must be performed, and the structure of the rotating machine is complicated and furthermore. The size was increased, resulting in a significant cost increase. Regardless of whether the rotating machine is large or small, there is also a means to apply forced cooling (air cooling) by a cooling fan, but due to air cooling of the sealed space from the outside,
Even if the size of the cooling fan is excessively increased, only an extra output is required and a desired cooling effect cannot be obtained.

[0007] The present invention has been made based on the above facts, and an object of the present invention is to make it possible to easily perform a work of assembling a permanent magnet on a rotor, and thus to reduce an assembling work load and to assemble. An object of the present invention is to provide a new craw-pole type rotating machine which enables a reduction in working time.

Another object of the present invention is to make it possible to assemble a permanent magnet in a rotor without breaking it.
An object of the present invention is to provide a new craw pole type rotating machine.

Yet another object of the present invention is to provide a novel claw-pole type rotating machine which enables mass production at low cost despite the permanent magnet being assembled in the rotor.

Still another object of the present invention is to prevent dust from being attracted to a rotor having a permanent magnet, thereby making it possible to open a housing space of a winding portion of a rotor and a stator without sealing. Accordingly, it is an object of the present invention to provide a new claw-pole type rotating machine which enables a sufficient cooling effect to be obtained.

Still another object of the present invention is to make it possible to reliably prevent dust from adsorbing and entering a gap between a rotor and a stator, and to obtain a sufficient cooling effect. An object of the present invention is to provide a new craw pole type rotating machine.

Still another object of the present invention is to provide a novel claw-pole type rotating machine which has a simple structure and can obtain a sufficient cooling effect at low cost.

Still another object of the present invention is to provide a novel claw-pole type rotating machine which can be put to practical use by a simple modification and can obtain a sufficient cooling effect without largely changing the conventional basic structure. It is to provide.

Other objects and features of the present invention will become apparent from the following description of embodiments of a claw-pole type rotating machine constructed according to the present invention, with reference to the accompanying drawings. .

[0015]

According to one aspect of the present invention, there is provided a rotor having a rotating shaft integrally mounted thereon, and a stator arranged so as to cover an outer peripheral surface of the rotor with a gap therebetween. An iron core connected to the rotating shaft, a first magnetic pole body disposed radially outside the iron core and having a plurality of first claws, and a permanent magnet disposed between the iron core and the first magnetic pole body. Magnet means and a second pole body substantially adjacent to the iron core and coupled to the rotation axis and having a plurality of second claws, each of the first and second claws being circumferentially alternately arranged. In the claw-pole type rotating machine, an annular permanent magnet assembly is disposed between the iron core and the first magnetic pole body, and the permanent magnet assembly includes an inner protective case, an outer protective case, and both cases. Characterized by being integrally formed with the permanent magnet means mounted therebetween. Claw-pole type rotary machine, is provided. The inner protective case and the outer protective case are each formed of a cylindrical member, and the permanent magnet means is formed of a plurality of permanent magnets or a cylindrical shape, each of which is formed to have an arc shape and is arranged to form a cylindrical shape as a whole. It is preferable that it is constituted by one permanent magnet integrally formed. The outer peripheral surface of the inner protective case and the inner peripheral surface of the outer protective case are formed in polygons similar to each other, and the surfaces forming the polygons in both cases face each other with a gap in the radial direction. The permanent magnet means is constituted by a plurality of permanent magnets each formed to have a trapezoidal or rectangular cross section, and each of the permanent magnets is provided between each of the mutually facing surfaces of both cases. Preferably, it is inserted. A mounting hole is formed in the first magnetic pole body, an inner peripheral surface of the inner protective case is fitted to an outer peripheral surface of the iron core, and an outer peripheral surface of the outer protective case is fitted to the mounting hole of the first magnetic pole body. It is preferable that the permanent magnet assembly is disposed between the iron core and the first magnetic pole body.

According to another aspect of the present invention, the rotor includes a rotor integrally mounted thereon, and a stator arranged so as to cover an outer peripheral surface of the rotor with a gap therebetween, wherein the rotor is attached to the rotary shaft. A coupled core, a first pole body disposed radially outward of the core and having a plurality of first claws, permanent magnet means disposed between the core and the first pole body, and an iron core. And a second pole body substantially adjacent to the second axis and coupled to the rotation axis and having a plurality of second claws, each of the first and second claws being circumferentially alternately arranged. In the machine, an annular permanent magnet assembly is disposed between the iron core and the first magnetic pole body, and the permanent magnet assembly is mounted on the outer protective case and the inner peripheral surface of the outer protective case. A claw-pole type rotation integrally formed by permanent magnet means , It is provided. The outer protective case is formed by a cylindrical member, and the permanent magnet means is formed so as to have an arc shape and a plurality of permanent magnets arranged so as to form a cylindrical shape as a whole, or integrally formed to form a cylindrical shape. It is preferable that it is composed of a single permanent magnet. A mounting hole is formed in the first magnetic pole body, and an inner peripheral surface of each of a plurality of permanent magnets arranged so as to form a cylindrical shape as a whole or one permanent magnet integrally formed so as to form a cylindrical shape. By fitting the inner peripheral surface to the outer peripheral surface of the iron core and the outer peripheral surface of the outer protective case to the mounting hole of the first magnetic pole body, the permanent magnet assembly is placed between the iron core and the first magnetic pole body. It is preferred that the

In the above invention according to one aspect and another aspect of the present invention, the stator includes case means including one end wall and the other end wall rotatably supported by the rotation shaft on both axial sides of the rotor, and the stator includes a case. Supported by the means, the stator is equipped with a dust cover that covers the outer surface portion of the rotor that is not covered by the stator with a gap,
Is preferred. It is preferable that the dust cover is constituted by a pair of cover members formed of plate members extending radially inward from both axial ends of the stator along both axial sides of the rotor. It is preferable that each of the cover members is made of a non-magnetic material. Each of the cover bodies has, at a central portion thereof, a disk portion having a hole formed therein for allowing the rotation shaft to pass therethrough with a gap, and an annular flange portion extending in the axial direction from the periphery of the disk portion. Large diameter portions are formed at both axial end portions of the inner peripheral surface of the stator, and each of the cover bodies is fitted with the outer peripheral surface of the annular flange portion in the corresponding large diameter portion of the stator. It is preferable to be attached by. It is preferable that at least one ventilation hole is formed in one end wall and the other end wall of the case means. It is preferable that a cooling fan is mounted on the rotating shaft near one end wall or the other end wall.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a claw-pole type rotating machine constructed according to the present invention will be described in detail below as an embodiment applied to a generator with reference to the accompanying drawings.
In FIGS. 1 to 13, substantially the same parts are denoted by the same reference numerals. With reference to FIGS. 1 to 4, a claw-pole generator generally denoted by reference numeral 200 includes a rotor 10,
A pair of case members 20 and 22 and a stator 30 are provided. The rotor 10 includes a rotating shaft 40, an iron core 50, a permanent magnet assembly 60, a first magnetic pole body 70, and a second magnetic pole body 80.

Referring to FIGS. 5 and 6 together with FIGS. 1 to 4, a keyway 42 is formed near the axial center of the rotating shaft 40. The key groove 42 is formed for key-coupling an iron core 50, a second magnetic body 80, and a side plate 90 described later. The iron core 50 has a relatively thick cylindrical shape, and a connection hole 52 with a key groove formed along the axis thereof is fitted to the rotary shaft 40 and integrated with the key 42 (see FIG. 3). Linked to The iron core 50 is formed of a ferromagnetic material, in this embodiment, carbon steel for machine structural use having a relatively low carbon content, and its outer peripheral surface is formed to have a circumferential surface shape. The axial length of the iron core 50 depends on the axial length of the permanent magnet assembly 60 described later and the first magnetic pole body 70.
The base 72 is formed longer than the axial length.

The permanent magnet assembly 60 having an annular shape as a whole
Are formed of an annular inner protective case 61, an annular outer protective case 62, and a plurality of (() constituting permanent magnet means mounted between the outer peripheral surface of the inner protective case 61 and the inner peripheral surface of the outer protective case 62. In the embodiment, it is integrally formed with eight (permanent) permanent magnets 63. Each of the inner protective case 61 and the outer protective case 62 is formed of a cylindrical member made of a ferromagnetic material, in this embodiment, carbon steel for mechanical structures having a relatively low carbon content. The inner peripheral surface and the outer peripheral surface of the inner protective case 61 are formed so as to form concentric circumferential surfaces. The inner peripheral surface of the inner protective case 61
The iron core 50 is formed in such a size that fitting with the outer peripheral surface thereof is allowable. The outer protective case 62 is formed to have an inner diameter larger than the outer diameter of the inner protective case 61,
The inner peripheral surface and the outer peripheral surface are formed so as to form concentric circumferential surfaces.

Each of the permanent magnets 63 made of common parts
It is made of a ferromagnetic material, for example, an Nd-Fe-B-based material, and is formed so that its cross section has an arc shape having a substantially constant thickness as shown in FIG. Permanent magnet 63
The arc-shaped inner surface is formed so as to substantially align with the outer peripheral surface of the inner protective case 61, and the arc-shaped outer surface is formed so as to substantially align with the inner peripheral surface of the outer protective case 62. ing. Further, both circumferential sides of the permanent magnet 63 are positioned on two virtual flat surfaces extending at a 45 ° angle to each other in the radial direction through a common axis forming the arc shape of the inner surface and the outer circumferential surface. And both end surfaces in the axial direction are formed so as to be positioned on two parallel virtual flat surfaces orthogonal to the axis.
Each of the permanent magnets 63 formed as described above is integrated by being inserted into an annular gap formed between the outer peripheral surface of the inner protective case 61 and the inner peripheral surface of the outer protective case 62. Thus, the permanent magnet assembly 60 is configured. The insertion of each of the permanent magnets 63 into the gap formed between the inner protective case 61 and the outer protective case 62 is preferably press-fitting. Both circumferential sides of the permanent magnet 63 are substantially adhered to each other.

As described above, each of the permanent magnets 63 is sandwiched between the inner protective case 61 and the outer protective case 62 to form the permanent magnet assembly 60. , From the radially inner side of the inner protective case 61 and the radially outer side of the outer protective case 62,
Each of the permanent magnets 63 is magnetized. Therefore, a magnetic pole surface is formed on each of the inner surface and the outer surface in the radial direction of the permanent magnet 63. The magnetic poles on each radially outer surface of the permanent magnet 63 are all magnetized to the same polarity (N pole in the embodiment), and the magnetic poles on each radially inner surface are all different poles (implemented) with respect to the radially outer surface. (In the embodiment, S pole).

The first magnetic pole body 70 is formed of a ferromagnetic material, in this embodiment, carbon steel for mechanical structure having a relatively low carbon content, and has an annular base 72 and a plurality of integrally formed bases 72. In the embodiment, six first claws 74 are provided. The base 72 is formed so as to have a substantially cylindrical shape as a whole, and a mounting hole 76 having a circular inner peripheral surface is formed at the axis thereof. The axial length of the base 72 is formed substantially the same as the axial length of the permanent magnet assembly 60. The mounting hole 76 is formed in a size that allows the fitting between the permanent magnet assembly 60 and the outer protective case 62. Each of the first claws 74 having substantially the same configuration is formed so as to protrude radially outward from the outer peripheral portion of the base 72 and extend in the same axial direction at equal intervals in the circumferential direction. Each of the first claws 74 is formed in a substantially isosceles triangular shape so as to taper from the base 72 toward the axial end when viewed from the outside in the radial direction. Each of the first claws 74 is also formed to have a radially outer arc surface of the same curvature about the axis of the first magnetic pole body 70, that is, the axis of the mounting hole 76. Therefore, the arc surface of each of the first claws 74 is positioned on one virtual circumferential surface having an axis common to the axis of the first magnetic pole body 70. Of each of the portions of the first magnetic pole body 70 where the first claw 74 is formed, 1
A connection hole 78 (see FIG. 2) extending parallel to the axis of the first magnetic pole body 70 is formed in the symmetrical portion on the opposite side of 80 °. One end of each of the connection holes 78 is formed to open on one side in the axial direction of the first magnetic pole body 70 (one side opposite to the second magnetic pole body 80 described later in the axial direction), and the other end is closed. ing.

The first magnetic pole body 70 constructed as described above
Are positioned coaxially so that the mounting hole 76 of the base 72 covers the radial outside of the core 50 connected to the rotating shaft 40. An annular gap is formed between the outer peripheral surface of the iron core 50 and the inner peripheral surface of the mounting hole 76 of the first magnetic pole body 70, and the permanent magnet assembly 60 is inserted into this gap to be mounted. Is done. That is, the inner peripheral surface of the inner protective case 61 in the permanent magnet assembly 60 is fitted to the outer peripheral surface of the iron core 50, and the outer peripheral surface of the outer protective case 62 is the inner peripheral surface of the mounting hole 76 of the first magnetic pole body 70. Is fitted to. Preferably, these fittings are press fits.

As described above, the iron core 5 is
0, one side in the axial direction of the iron core 50, the permanent magnet assembly 60 and the first magnetic pole body 70 in a state where the permanent magnet assembly 60 and the first magnetic pole body 70 are mounted (the second magnetic pole body 8
The side opposite to 0 in the axial direction) is positioned substantially on a virtual flat surface orthogonal to the axis of the rotating shaft 40 (see FIG. 2). An annular side plate 90 is connected to the rotating shaft 40 via the key 42 substantially in contact with the one side surface of each of the iron core 50, the permanent magnet assembly 60, and the first magnetic pole body 70. The side plate 90 is formed of a non-magnetic material, in this embodiment, aluminum, into a disk shape having a certain thickness, and a connection hole 92 with a key groove is formed at the axial center thereof. At two locations, boss portions 94 projecting outward in the radial direction are formed. Each of the boss portions 94 is formed at a symmetrical position 180 ° opposite to the axis of the side plate 90. Each of the bosses 94 has a connection hole 96 formed therein. With the side plate 90 connected to the rotating shaft 40 as described above, each of the connection holes 96 is aligned with the corresponding connection hole 78 of the first magnetic pole body 70. Connection holes 9 aligned with each other
A knock pin 97 is driven into each of 6 and connection hole 78 (see FIG. 2). The side plate 90 connected to the rotating shaft 40 is connected to the first magnetic pole body 70 by each of the knock pins 97 such that the side plate 90 cannot be relatively rotated.

As described above, when the iron core 50, the permanent magnet assembly 60, the first magnetic pole body 70, and the side plate 90 are connected on the rotating shaft 40, the iron core 50
A part thereof is positioned so as to protrude by a predetermined length from the other axial side surface (the side surface opposite to the side plate 90 side) of each of the permanent magnet assembly 60 and the base 72 of the first magnetic pole body 70 (FIG. 2). A spacer 54 is fitted on the outer peripheral surface of the core 50 at the protruding portion. The spacer 54 is formed of a nonmagnetic material, in this embodiment, aluminum, in a ring shape having a rectangular cross section, and has a mounting hole 54a formed in the axial center thereof. Spacer 5
4 is mounted on the iron core 50 by fitting the mounting hole 54a to the outer peripheral surface of the protruding portion of the iron core 50. The fitting is preferably press-fitting. In a state where the spacer 54 is mounted on the iron core 50, one axial side surface of the spacer 54 contacts the other axial side surface of each of the permanent magnet assembly 60 and the base 72 of the first magnetic pole body 70. The other side surface in the axial direction of the spacer 54 is positioned so as to be on a common virtual flat surface orthogonal to the axis of the rotating shaft 40 together with the other side surface of the iron core 50 (see FIG. 2).

The second magnetic pole body 80 is formed of a ferromagnetic material, in this embodiment, carbon steel for mechanical structure having a relatively low carbon content, and is formed integrally with the annular substrate portion 82 and the substrate portion 82. A plurality of, in the embodiment, six second claws 84 are provided. The substrate part 82 is formed so as to have a substantially disk shape as a whole, and a connection hole 86 with a key groove for mounting to the rotating shaft 40 is formed at the axis thereof. Second claws 84 each having substantially the same configuration
Are formed to protrude radially outward from the outer peripheral portion of the substrate portion 82 and extend in the axial direction at equal intervals in the circumferential direction. Each of the second claws 84 is formed in a substantially isosceles triangular shape so as to be tapered from the substrate portion 82 toward the front end in the axial direction when viewed from the outside in the radial direction. Each of the second claws 84 is also formed to have a radially outer arc surface having the same curvature about the axis of the second magnetic pole body 80, that is, the axis of the connection hole 86. Accordingly, the arc surface of each of the second claws 84 is positioned on one virtual circumferential surface having an axis common to the axis of the second magnetic pole body 80. This virtual circumferential surface is defined to have the same radius as the virtual circumferential surface of each of the first claws 74 in the first magnetic pole body 70. Note that the axial length of each radially outer circular arc surface of the first claw 74 of the first magnetic pole body 70 and the axial length of each radially outer circular arc surface of the second claw 84 of the second magnetic pole member 80 are as follows. , Are substantially the same.

The second magnetic pole body 80 constructed as described above
Is connected to the rotary shaft 40 adjacent to the iron core 50 by connecting the connection hole 86 of the substrate portion 82 to the rotary shaft 40 via the key 42. That is, the second magnetic pole body 80
One side surface of the substrate portion 82 is positioned so as to contact the other side surface of each of the iron core 50 and the spacer 54 (see FIG. 2). The second magnetic pole body 80, together with the iron core 50, the permanent magnet assembly 60, the first magnetic pole body 70, etc.
In the state of being mounted above, the first claw 74 of the first magnetic pole body 70 and the second claw 84 of the second magnetic pole body 80 are alternately positioned with a gap in the circumferential direction, and
The radially outer arc surfaces of each of the first claw 74 and the second claw 84 are positioned so that their respective axial positions are aligned, and are positioned on the common virtual circumferential surface.
The length of the rotation shaft 40 is defined such that the rotation shaft 40 projects axially outward from each side surface of the substrate portion 82 and the side plate 90 of the second magnetic pole body 80.

Referring to FIGS. 1 to 4, radial ball bearings (hereinafter simply referred to as “bearings”) 2 and 3, which are bearings, are provided on each of the protrusions of the rotating shaft 40.
Is press-fitted and fitted. Bearing 2 of rotating shaft 40
The ring-shaped spacer 4 is interposed between the bearing 3 and the substrate 82 of the second magnetic pole body 80, and the sleeve-shaped spacer 5 is interposed between the bearing 3 and the side plate 90. Thereby, the mounting position in the axial direction of each of the members assembled on the rotating shaft 40 is defined. One case member 20 is rotatably supported on the rotating shaft 40 via the bearing 2, and the other case member 22 is supported on the rotating shaft 40 via the bearing 3 so as to be relatively rotatable. The stator 3 is provided between the pair of case members 20 and 22.
0 is the outer peripheral surface of the rotor 10, specifically, the first magnetic pole body 7
0 of the first claw 74 and the second claw 8 of the second magnetic pole body 80
4 is mounted so as to cover the outer peripheral surface defined by each radially outer arc surface with a gap.

The one case member 20 includes one end wall 20a extending in a direction perpendicular to the rotation shaft 40, and an annular flange portion 20b extending axially from the periphery of the one end wall 20a. No. The other case member 22 includes a second end wall 22a extending in a direction perpendicular to the rotation shaft 40, and an annular flange portion 22b extending axially from a peripheral edge of the second end wall 22a, and has a substantially cap shape as a whole. No. Spline teeth (female) are formed on the inner peripheral surface of the annular flange portion 20b of the one case member 20 in the axial direction and the inner peripheral surface of the annular flange portion 22b of the other case member 22 in the axial direction. The one end wall 20a of one case member 20 and the other end wall 22a of the other case member 22 are each formed with at least one ventilation hole, in this embodiment, a plurality of ventilation holes 20c and 22c. Lower end portions of one case member 20 and the other case member 22, one end wall 2 in the embodiment.
At least one (in the embodiment, one each) water drainage hole 20d and 22d is formed at the lower end of the corner between the outer flange 0a and the annular flange 20b and at the lower end of the annular flange 22b. Bosses 20e projecting outward in the radial direction are formed at two places on the outer peripheral portion of one of the case members 20, and each of the bosses 20e is formed with a mounting hole 20f for a stationary frame (not shown). A boss portion 22e protruding radially outward is formed at one position on the outer peripheral portion of the other case member 22, and a winding 34 held by a stator 30 described later is inserted into and held in each of the boss portions 22e. Holding hole 22f is provided. Relatively small bosses 20g and 22g projecting outward in the radial direction are formed at four locations on the outer peripheral portion of each of the annular flange portion 20b and the annular flange portion 22b, and each of the boss portions 20g and 22g has a mounting hole ( A screw hole 20h and a mounting hole (through hole) 22h are formed. One case member 20 and the other case member 22 configured as described above
Is arranged such that the distal ends of the annular flange portion 20b and the annular flange portion 22b face each other at an interval in the axial direction. In the state where the case members 20 and 22 are arranged to face each other in the axial direction as described above, the spline teeth of the annular flange portions 20b and 22b are positioned on the common axis with the rotating shaft 40, and the boss portion 20g and Each of the mounting holes 20h and 22h of the respective 22g is positioned so as to be aligned and opposed to each other on a common axis.

The substantially cylindrical stator 30 is integrally formed from a magnetic material such as an iron material or a steel material, or is integrally formed from a laminated body such as an iron plate or a steel plate (in the embodiment, integrally formed from a steel material). ing). Slots 32 extending in the axial direction are formed at intervals in the circumferential direction in the stator 30 configured as described above. Each of the slots 32 is opened on the inner peripheral surface and on both axial side surfaces of the stator 30, and is formed so as to diverge outward in the radial direction when viewed from the axial direction. A winding 34 made of a bundle of copper wires is inserted into each of the slots 32.
Is held. Spline teeth (male) are formed on the outer peripheral surface (circular outer peripheral surface) at both axial ends of the stator 30. Stator 30 configured as described above
Means that each of its spline teeth is
Of the annular flange portion 20b and the annular flange portion 22b of the other case member 22 are fitted and supported by spline teeth at the distal ends thereof.
Each of the annular flange portions 20b and 22b is tightened in a direction approaching each other in the axial direction by a plurality of elongated screws (not shown) between the boss portions 20g and 22g which are axially opposed to each other in each of the annular flange portions 20b and 22b. It is mounted and supported in the form of being pinched in the direction. Each of the one case member 20, the other case member 22, and a screw (not shown) forms a case means including one end wall 20a and the other end wall 22a. The claw-pole type generator 200 configured as described above is mounted on a stationary frame (not shown) with bolts and nuts (not shown) through the mounting holes 20f.

A cooling fan 6 is provided at one end of the rotating shaft 40.
And a pulley 7 for rotational driving is integrally mounted by bolts 8. The pulley 7 is drivingly connected to a drive source, for example, a crankshaft of an engine, via a V-belt (not shown) and other power transmission means.

The stator 30 includes an outer surface portion of the rotor 10 that is not covered with the stator 30, more specifically, the rotor 10 protrudes radially outward from the rotation shaft 40 and integrally rotates with the rotation shaft 40. The stator 3 of the rotating body part (in the embodiment, the iron core 50, the spacer 54, the permanent magnet assembly 60, the first magnetic body 70, the second magnetic body 80, the side plate 90, and the knock pin 97).
A dust cover that covers an outer surface portion that is not covered by a gap with a gap is attached. Referring primarily to FIG.
The dust covers are a pair of cover bodies 100 and 10 extending radially inward from both axial ends of the stator 30 along both axial sides of the rotating body portion of the rotor 10.
2 is comprised. The cover bodies 100 and 102
Heat-resistant synthetic resin, austenitic stainless steel, a non-magnetic material made of a thin plate such as a steel plate, or a magnetic material made of a thin metal plate such as a steel plate can be used. It is composed of a thin resin plate. Each of the cover bodies 100 and 102
Disc portions 100a and 102a, disc portions 100a and 1
02a, an annular flange portion 100 extending in the axial direction from the periphery
b and 102b, and has a cap shape with a relatively shallow bottom as a whole. Disk parts 100a and 102a
Are formed with holes 100c and 102c at the center thereof. The holes 100c and 102c are formed to allow the rotation shaft 40 of the rotor 10 to penetrate with a gap in a state where each of the cover bodies 100 and 102 is mounted on the stator 30 as described later. Is what it is.

A large-diameter portion is formed at each axial end portion of the circular inner peripheral surface of the stator 30, and an annular step extending in the radial direction is formed between the large-diameter portion and the other small-diameter portions. Since the slots 32 are opened in the inner peripheral surface of the stator 30 at intervals in the circumferential direction, the inner peripheral surface of the stator 30 composed of each of the large-diameter portions and the other small-diameter portions has And a discontinuous inner peripheral surface. Each of the cover bodies 100 and 102 configured as described above is formed by fitting (press-fitting) the outer peripheral surfaces of the annular flange portions 100b and 102b into the corresponding large-diameter portion (the inner peripheral surface) of the stator 30. Be attached. In some embodiments, an adhesive is used as needed. In a state in which each of the cover bodies 100 and 102 is mounted on the stator 30 as described above, the inner peripheral surfaces of the annular flange portions 100b and 102b correspond to the inner peripheral surface of the stator 30 (the inner peripheral surface of the other small diameter portion). )
And at least one rotor 1
0 (specifically, the outer peripheral surface defined by the radially outer arc surface of each of the first claw 74 of the first magnetic pole body 70 and the second claw 84 of the second magnetic pole body 80). It must be positioned so that a gap is formed. Of course, each disk portion 100a of the cover bodies 100 and 102
, 102a and the corresponding axial side surface of the rotor 10 as well. At the lower ends of the disk portions 100a and 102a in each of the cover bodies 100 and 102,
A drain hole (not shown) is formed.

Referring to FIG. 2, in the claw pole type generator 200 configured as described above, when the engine operates, the rotor 10 is driven to rotate via the power transmission means, the pulley 7 and the rotary shaft 40. . As described above, each of the permanent magnets 63 of the permanent magnet assembly 60 is magnetized such that all radially outer surfaces form N poles and all radially inner surfaces form S poles. , First magnetic pole body 70
Each of the first claws 74 defines an N pole, and each of the second claws 84 of the second pole body 80 defines an S pole. Accordingly, each of the permanent magnets 63, the outer protective case 62, each of the first claws 74 of the first magnetic pole body 70, the stator 30,
Second claw 8 circumferentially adjacent to each of first claws 74
4, a magnetic circuit is formed between the iron core 50 and the inner protective case 61. As a result, the rotation of the rotor 10 generates an electric current in the winding 34 arranged on the stator 30, and the electric power is generated. When the engine is stopped, the rotation of the rotor 10 is stopped, and power generation is stopped.

The claw-pole generator 200 according to the present invention
In the above embodiment, the permanent magnet assembly 60 of the rotor 10 includes the inner protective case 61 and the outer protective case 62.
And the permanent magnet means mounted between the cases 61 and 62, and in the above-described embodiment, a plurality of permanent magnets 63 each formed in an arc shape and arranged so as to form a cylindrical shape as a whole. It is important that it is configured in. Since the permanent magnet assembly 60 is configured as described above, first, each of the permanent magnets 63 can be inserted (press-fitted) between the inner protective case 61 and the outer protective case 62 without being magnetized. The work of assembling the permanent magnet assembly 60 is extremely easy, the work load of assembling the permanent magnet assembly 60 is small, and the permanent magnet assembly 60 can be assembled in a short time. In this assembling work, the permanent magnet 63
Since there is no magnetic force at the time of press-fitting each of them, the risk of damaging each of the permanent magnets 63 is significantly reduced. Furthermore, each of the permanent magnets is not magnetized individually, but is magnetized simultaneously in a state where the permanent magnets are integrally assembled by the inner protective case 61 and the outer protective case 62 as the permanent magnet assembly 60. Is possible, and the efficiency of the magnetization process is improved.

Further, the iron core 50 of the rotor 10 and the first
The permanent magnet assembly 60 that is press-fitted between the magnetic pole body 70 and the permanent magnet assembly 60 is entirely magnetized, but the inside and outside of each of the permanent magnets are integrally provided with an inner protective case 61 and an outer protective case 61. Since it is covered by the case 62, the press-fitting is significantly easier as compared with the conventional press-fitting of magnetized permanent magnets individually via spacers. As a result, it is possible to easily perform the work of assembling each of the permanent magnets 63 in the rotor 10 between the iron core 50 and the first magnetic pole body 70, and thus reduce the work of assembling work, and This makes it possible to reduce the working time. The order of assembling the permanent magnet assembly 60 between the iron core 50 and the first magnetic pole body 70 is as follows.
0 is pressed into the iron core 50 connected to the rotating shaft 40,
The method of press-fitting the first magnetic body 70 into the permanent magnet assembly 60 is preferable in terms of workability.

Further, the assembling work of each of the permanent magnets 63 in the rotor 10 between the iron core 50 and the first magnetic pole body 70 is performed by mounting the inside and outside of each of the permanent magnets 63 integrally. Inner protective case 61 and outer protective case 6
Permanent magnet assembly 60 covered by 2
Is performed, it is possible to sufficiently reliably prevent damage to each of the permanent magnets 63 even though each of the permanent magnets 63 is in a magnetized state. As a result of the above, the claw-pole type generator 200 according to the present invention enables mass production of the permanent magnets 63 at low cost, despite the fact that each of the permanent magnets 63 is assembled in the rotor 10.

As described above, each of the permanent magnets 63 disposed on the permanent magnet assembly 60 of the rotor 10 is made of a magnetic material having a strong magnetic force, in this embodiment, an Nd-Fe-B-based material. Therefore, even when the rotor 10 is stopped, magnetism leaks to the outside, especially around the side surface of the rotor 10. However, in the rotating machine 200 according to the present invention, the stator 30 is
Cover bodies 100 and 10 which are dust covers which cover an outer surface portion not covered by the stator 30 with a gap.
2 is mounted, almost the entire area of both sides of the rotor portion of the rotor 10 is shielded by the cover members 100 and 102, and the rotor portion of the rotor 10 having the permanent magnet 63 (particularly the first magnetic pole member) 70 and second magnetic pole body 80)
Can be prevented from adsorbing dust such as iron powder, so that it is possible to open the housing space of the portion of the windings 34 of the rotor 10 and the stator 30 without sealing.
That is, as in the embodiment, the rotating shaft 40, the bearings 2, 3, and the case member 2 forming the housing space.
0, 22 and stator 30, ventilation holes 20 c are formed in one end wall 20 a and the other end wall 22 a of case members 20 and 22.
And 22c can be formed, and a sufficient cooling effect can be obtained. Thereby, the stator 30
The heat generated by the winding 34 can be effectively released from the accommodation space to the outside.
0, by reducing the thermal effect on the permanent magnet assembly 60, the first magnetic pole body 70, the second magnetic pole body 80, the bearings 2 and 3, etc.
Power generation efficiency, durability, and reliability can be improved.

When the covers 100 and 102 are made of a non-magnetic material such as a heat-resistant synthetic resin as in the embodiment, the effect of preventing dust from being absorbed is improved. Rotating shaft 40
The ventilation hole 20 of the case member 20 or the case member 22
c and 22c are formed on one end wall 20a or the other end wall 22
When the cooling fan 6 is mounted close to a, the cooling fan 6 surrounds the rotating shaft 40, the bearings 2 and 3, the one case member 20, the other case member 22, and the stator 30. It becomes possible to forcibly ventilate the inside of the accommodation space and air-cool, so that a higher cooling effect can be obtained. Since the ventilation holes 20c and 22c are formed in the accommodation space, a sufficient cooling effect can be obtained by using a relatively small cooling fan 6.
The output for rotating the cooling fan 6 can also be kept low, which is economical.

The claw-pole generator 200 according to the invention
In the above-described embodiment, as described above, the cover bodies 100 and 102 that are dust covers that cover the outer surface portion of the rotor 10 that is not covered with the stator 30 with a gap are attached to the stator 30. However, according to this configuration, the outer peripheral surface of the rotor 10 (the first claw 74 and the second magnetic pole body 80 of the first magnetic pole body 70) of dust made of iron powder or the like.
The outer peripheral surface defined by each radially outer circular arc surface of the second claw 84) and the inner peripheral surface of the stator 30 can be reliably prevented from adsorbing and intruding into the gap between the second claw 84 and the inner peripheral surface of the stator 30, and sufficient cooling can be achieved. Since it is possible to obtain the effect, the permanent magnet 6
3, a predetermined magnetic force is secured, and the power generation efficiency is improved and the durability is also improved.

In the case where the dust cover is constituted by a pair of cover members 100 and 102 made of plate members extending radially inward from both ends in the axial direction of the stator 30 along both axial sides of the rotor 10, respectively. Has a simple structure and is capable of obtaining a sufficient cooling effect at low cost.

Further, each of the cover members 100 and 102 has a disk portion 100a or 102a having a hole 100c or 102c at the center thereof for allowing the rotating shaft 40 to pass therethrough with a gap. And an annular flange portion 10 extending in the axial direction from the periphery of the disk portions 100a and 102a.
0b and 102b, large diameter portions are formed at both axial ends of the inner peripheral surface of the stator 30, and the cover body 100
And 102 are configured to be mounted by fitting the outer peripheral surfaces of the annular flange portions 100b and 102b into the corresponding large diameter portions of the stator 30, respectively. The stator 30
It can be easily mounted on a vehicle, and can be put to practical use by a simple modification without drastically changing the conventional basic configuration, and it is possible to obtain a sufficient cooling effect.

Further, when drain holes 100c and 102c are formed at the lower ends of the disk portions 100a and 102a in the cover bodies 100 and 102, the inflowing water and the mud and the like are formed in one case member 20. And / or drain to the bottom within the other case member 22 to prevent corrosion of the rotor 10, stator 30, windings 34, or other adverse effects of water on them. When the drain holes 20d and 22d are formed at the lower ends of the one case member 20 and the other case member 22, the one case member 20 and the other case member 2
2. Water that has flowed into the housing space formed by the bearings 2, 3, and the stator 30 can be discharged to the outside together with mud and the like, thereby preventing corrosion of each part and adverse effects due to water.

FIGS. 7 to 9 show another embodiment of the permanent magnet assembly 60 in the rotor 10. In this embodiment, the permanent magnet assembly 60 is mounted between an annular inner protective case 64, an annular outer protective case 65, and an outer peripheral surface of the inner protective case 64 and an inner peripheral surface of the outer protective case 65. And a plurality of (eight in the embodiment) permanent magnets 66 constituting the permanent magnet means. The inner peripheral surface of the inner protective case 64 and the outer peripheral surface of the outer protective case 65 are formed to have the same circumferential surface shape as the inner protective case 61 and the outer protective case 62. The surface and the inner peripheral surface of the outer protective case 65 are formed so that each cross section forms a polygon similar to each other, in the embodiment, a regular octagon. As shown in FIG. 10, each of the permanent magnets 66 made of common components is formed so that its cross section has a trapezoidal shape. The flat inner surface of the permanent magnet 66 is formed so as to substantially match the polygonal surface on the outer peripheral surface of the inner protective case 64, and the flat outer surface is formed inside the outer protective case 65. The peripheral surface is formed so as to substantially match the surface forming the polygon. The other configuration of the permanent magnet 66 is substantially the same as the other configuration of the permanent magnet 63, and a description thereof will be omitted. By positioning the inner protective case 64 and the outer protective case 65 coaxially with each other, each of the surfaces forming the polygon in the two cases 64 and 65 is positioned so as to face each other with a gap in the radial direction. Each of the permanent magnets 66 is connected to both cases 64.
And 65 are integrated by being inserted (press-fitted) between the mutually facing surfaces to form a permanent magnet assembly 60. Both circumferential sides of the permanent magnet 66 are
Substantially adhered to each other.

Rotor 1 described with reference to FIGS. 7 to 10
0 in comparison with the embodiment of the permanent magnet assembly 60 described with reference to FIGS.
Shape of outer peripheral surface of inner protective case 64, outer protective case 6
5 except that the shape of the inner peripheral surface and the shape of the permanent magnet 66 inserted between the two cases 64 and 65 are substantially the same. Therefore, the permanent magnet assembly 60 in this embodiment substantially reduces the operation and effect as the permanent magnet assembly 60 and the operation and effect as the generator 200 including the rotor 10 including the permanent magnet assembly 60. This can be achieved in the same manner as in the previously described embodiment.

FIG. 11 shows still another embodiment of the permanent magnet assembly 60 in the rotor 10. In this embodiment, the permanent magnet assembly 60 includes an inner protective case 64 and an outer protective case 65, and the two cases 64 and 6.
It is integrally formed with a plurality (eight in the embodiment) of permanent magnets 67 constituting a permanent magnet means mounted between the five. Inner protective case 64 and outer protective case 65
Is the inner protective case 6 of the permanent magnet assembly 60 shown in FIG.
4 and the outer protective case 65 have substantially the same configuration, and a description thereof will be omitted. As shown in FIG. 12, each of the permanent magnets 67 made of a common component is formed so that its cross section and plane are rectangular. The flat inner surface of the permanent magnet 67 is formed so as to substantially match the polygonal surface on the outer peripheral surface of the inner protective case 64, and the flat outer surface is formed inside the outer protective case 65. The circumferential surface is formed to be slightly shorter than the circumferential width of the surface forming the polygon (since the cross section of the permanent magnet 67 is rectangular). Further, both side surfaces in the circumferential direction of the permanent magnet 67 are formed so as to be orthogonal to the inner side surface and the outer side surface and to face each other in parallel. Other configurations of the permanent magnet 67 include the permanent magnet 6
3 are substantially the same as the other configurations, and thus description thereof is omitted.
Each of the permanent magnets 67 is integrated by being inserted (press-fitted) between the mutually facing surfaces of both cases 64 and 65 to form a permanent magnet assembly 60. The circumferential side surfaces of each of the permanent magnets 66 are not substantially adhered to each other, and a gap is formed at each corner of each of the cases 64 and 65 in a V shape when viewed in the axial direction. . Therefore, the two circumferential sides of the permanent magnet 66 are positioned so as to substantially substantially line contact with each other at the radially inner ends of the two side faces.

The permanent magnet assembly 60 of the rotor 10 described with reference to FIGS. 11 and 12 is different from the permanent magnet assembly 60 described with reference to FIGS. The other configurations are substantially the same except that the shape of the outer peripheral surface of the outer protective case 64, the shape of the inner peripheral surface of the outer protective case 65, and the shape of the permanent magnet 66 inserted between the two cases 64 and 65 are different. Therefore, the operation and effect of the permanent magnet assembly 60 and the operation and effect of the generator 200 including the rotor 10 including the permanent magnet assembly 60 are achieved in substantially the same manner as in the above-described embodiment. be able to.

FIG. 13 shows still another embodiment of the permanent magnet assembly 60 in the rotor 10. In this embodiment, the permanent magnet assembly 60 includes an outer protective case 62 and a plurality (eight in the embodiment) of permanent magnets 63 constituting permanent magnet means mounted on the inner peripheral surface of the outer protective case 62. And are formed integrally. Each of the outer protective case 62 and the permanent magnet 63 has substantially the same configuration as each of the outer protective case 62 and the permanent magnet 63 of the permanent magnet assembly 60 in the embodiment described with reference to FIGS. Therefore, the description is omitted. Since each of the permanent magnets 63 is formed by sintering metallurgy as described above,
It has relatively weak mechanical properties against tensile loads or bending loads, but relatively strong against compressive loads. Utilizing such mechanical characteristics, the permanent magnet 63
Are attached to the inner peripheral surface of the outer protective case 62 so as to form a cylindrical shape so that a slight circumferential compressive force acts on each of the two side surfaces in the circumferential direction. It is preferable to form the permanent magnet assembly 60. As described above, each of the permanent magnets 63 is mounted on the outer protective case 62 to form the permanent magnet assembly 60. In this assembled state, each of the permanent magnets 63 is radially inward. From the radially outer side of the outer protective case 62, each of the permanent magnets 63 is magnetized.

The permanent magnet assembly 60 in which each of the permanent magnets 63 is magnetized has an inner peripheral surface which is arranged so as to have a substantially circular inner peripheral surface. By fitting to the outer peripheral surface of 50, it is mounted on iron core 50. This fitting may be slightly press-fitting or may use an adhesive. Although each of the permanent magnets 63 is magnetized, since the permanent magnets 63 are integrally attached to the outer protective case 62 as described above, the fitting operation to the iron core 50 is performed as in the related art. This is significantly easier as compared with the operation of individually press-fitting the set permanent magnets via the spacers. Also, the inner protective case 6 in the previous embodiment
Since 1 is not used, the configuration of the permanent magnet assembly 60 is simplified, and the cost can be reduced as compared with the permanent magnet assembly 60 in the previous embodiment.

The permanent magnet assembly 60 of the rotor 10 described with reference to FIG. 13 is different from the permanent magnet assembly 60 described with reference to FIGS.
The other configuration except that the 1 is not used is substantially the same. Therefore, the permanent magnet assembly 60 according to this embodiment has the function and effect of the permanent magnet assembly 60 and the generator 20 including the rotor 10 including the permanent magnet assembly 60.
The function and effect as zero can be achieved substantially in the same manner as in the above-described embodiment.

The embodiment of the claw-pole type rotating machine constituted according to the present invention has been described in detail based on the embodiment applied to the generator 200 of the claw-pole type rotating machine with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment, and various other variations or modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the claw-pole type rotating machine is the claw-pole type generator 200, but instead of the claw-pole type electric motor having substantially the same configuration as the claw-pole type rotating machine, Needless to say, substantially the same operation and effect can be obtained. However, the above-mentioned "improvement in power generation efficiency" is replaced by "increase in output" in the claw-pole type electric motor. Further, in the above embodiment described with reference to FIGS. 1 to 6 and FIG. 13, the permanent magnet means is configured by arranging each of the plurality of permanent magnets 63 so as to form a cylindrical shape. Instead of this embodiment, there is another embodiment in which the permanent magnet means is constituted by a single permanent magnet integrally formed so as to have a cylindrical shape in advance. In this embodiment, since the permanent magnet means is composed of one permanent magnet, the assembling workability is further improved, and the number of parts is significantly reduced, so that the cost is further reduced. can get. Furthermore, in the permanent magnet assembly 60 in the above-described embodiment described with reference to FIGS. 7 to 12, the permanent magnet means includes a plurality of permanent magnets 66 or 67 each of which includes the inner protective case 64 and the outer protective case 64. 65, but instead of this embodiment, the permanent magnet means is replaced by one permanent magnet integrally formed so as to form a polygonal shape. There are also other embodiments consisting of. Furthermore, FIGS.
In the permanent magnet assembly 60 in the above embodiment described with reference to FIG. 2, there is another embodiment in which the inner protective case 64 is not used in the same manner as the embodiment shown in FIG. There are also other embodiments in which the magnet means is composed of a single permanent magnet which is integrally formed in advance into a polygonal shape). In these other embodiments, it goes without saying that the outer peripheral surface of the iron core is formed to have a polygonal shape.

Further, in the above embodiment, each of the cover bodies 100 and 102 is made of a thin plate of a heat-resistant synthetic resin which is a non-magnetic material. There are also embodiments configured from other metal plates. When each of the covers 100 and 102 is made of a metal plate made of a magnetic material, the cover 100
It is necessary to prevent the occurrence of eddy currents by providing means such as providing a relatively large gap between the corresponding side surface of the rotor portion of the rotor 10 and the corresponding side surface of the rotor. It is necessary to prevent a short circuit by providing a relatively large gap between the wire 34 and a suitable insulating material between the metal plate and the winding 34. As a material forming the metal plate, a material having a relatively large electric resistance (a material containing a relatively large amount of impurities)
It is preferred that

Further, in the above embodiment, the case means is constituted by one case member 20 and the other case member 22, and accommodates the rotor 10 and the like in such a manner that the stator 30 is sandwiched therebetween. Since the space is formed, the stator 30 also forms one member constituting the accommodation space, and is configured such that the outer peripheral surface thereof is exposed to the outside. In some embodiments, the member is completely covered. In the case of this embodiment, an increase in cost and weight cannot be avoided, but since the entire stator 30 is completely covered by the case member, the effect of preventing dust such as iron powder from adsorbing to the stator 30 is reduced by the cover body. 100 and 102
Are significantly improved by the synergistic effect of each of the mountings.

[0055]

According to the claw pole type rotating machine of the present invention, it is possible to easily perform the work of assembling the permanent magnets on the rotor, thereby reducing the work of assembling work and shortening the work time of assembling. To be able to Also,
It is possible to assemble the permanent magnet in the rotor without breaking. Furthermore, it enables mass production at low cost, despite the permanent magnet being assembled in the rotor. Further, by preventing dust from being attracted to the rotor having the permanent magnet, it is possible to open the housing space of the winding portion of the rotor and the stator without sealing, and as a result, a sufficient cooling effect is obtained. Make it possible to get Further, it is possible to reliably prevent dust from adsorbing and entering the gap between the rotor and the stator, and to obtain a sufficient cooling effect. Furthermore, it is possible to obtain a sufficient cooling effect at a low cost with a simple structure. Furthermore, the present invention can be put to practical use by a simple modification and can obtain a sufficient cooling effect without largely changing the conventional basic configuration.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a claw-pole type generator which is an embodiment of a claw-pole type rotating machine according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 2;

FIG. 4 is a plan view of a rotor included in the claw-pole type generator shown in FIGS.

5 is an exploded perspective view showing main components of the rotor shown in FIGS. 2 to 4; FIG.

FIG. 6 is a perspective view of a permanent magnet included in the rotor shown in FIGS. 2 to 4;

FIG. 7 is a perspective view showing another embodiment of the permanent magnet assembly included in the rotor of the claw-pole type rotating machine according to the present invention.

FIG. 8 is a perspective view of an inner protective case constituting the permanent magnet assembly shown in FIG. 7;

FIG. 9 is a perspective view of an outer protective case constituting the permanent magnet assembly shown in FIG. 7;

FIG. 10 is a perspective view of a permanent magnet included in the permanent magnet assembly shown in FIG. 7;

FIG. 11 is a perspective view showing still another embodiment of the permanent magnet assembly included in the rotor of the claw pole type rotating machine according to the present invention.

FIG. 12 is a perspective view of a permanent magnet included in the permanent magnet assembly shown in FIG. 11;

FIG. 13 is a perspective view showing still another embodiment of the permanent magnet assembly included in the rotor of the claw-pole type rotating machine according to the present invention.

[Explanation of symbols]

 Reference Signs List 6 cooling fan 10 rotor 20 one case member 20a one end wall 20c ventilation hole 22 the other case member 22a other end wall 22c ventilation hole 30 stator 40 rotation axis 50 iron core 60 permanent magnet assembly 61, 64 inner protection case 62, 65 Outer protective case 63, 66, 67 Permanent magnet 70 First magnetic body 72 Base 74 First claw 76 Mounting hole 80 Second magnetic body 82 Substrate section 84 Second claw 100 One cover body 102 The other cover body 200 Claw pole Type generator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 21/04 H02K 21/04 F term (Reference) 5H002 AA09 AB07 AC06 AD03 AE02 AE08 5H607 AA02 AA06 BB01 BB02 CC05 DD01 DD02 DD03 DD08 EE28 FF04 FF22 GG01 GG08 JJ05 KK03 5H619 AA03 AA05 AA11 BB01 BB02 BB05 BB13 BB15 BB17 PP01 PP02 PP05 PP08 PP10 5H621 BB07 GA01 GA07 GA13 GA14 GA16 GB10 HH01 JH05 JK02 J04 PP11 PP16 PP17 PP19

Claims (13)

[Claims] 1. A rotor having a rotating shaft integrally mounted thereon and a stator arranged to cover an outer peripheral surface of the rotor with a gap therebetween, the rotor comprising: an iron core connected to the rotating shaft;
A first pole body disposed radially outward of the core and having a plurality of first claws; permanent magnet means disposed between the core and the first pole body; substantially adjacent to the core. A second pole body connected to the rotating shaft and having a plurality of second claws, wherein each of the first and second claws is alternately arranged in a circumferential direction; An annular permanent magnet assembly is disposed between the two magnetic pole bodies, and the permanent magnet assembly is formed by an inner protective case, an outer protective case, and the permanent magnet means mounted between the two cases. A claw-pole type rotating machine which is integrally formed. 2. The inner protective case and the outer protective case are each formed of a cylindrical member, and the permanent magnet means is formed of a plurality of permanent magnets respectively formed in an arc shape and arranged in a cylindrical shape as a whole. 2. The claw-pole type rotating machine according to claim 1, wherein said claw-pole type rotating machine is constituted by one permanent magnet integrally formed to have a cylindrical shape. 3. The outer peripheral surface of the inner protective case and the inner peripheral surface of the outer protective case are formed in polygons similar to each other, and each of the surfaces forming the polygon in both cases is radially spaced from each other. The permanent magnet means is constituted by a plurality of permanent magnets each having a trapezoidal or rectangular cross section, and each of the permanent magnets faces each other in both cases. The claw-pole type rotary machine according to claim 1, wherein the rotary machine is inserted between each of the faces. 4. A mounting hole is formed in the first magnetic pole body, an inner peripheral surface of the inner protective case is fitted to an outer peripheral surface of the iron core, and an outer peripheral surface of the outer protective case is fitted to the mounting hole of the first magnetic pole body. The claw-pole type rotating machine according to claim 2 or 3, wherein the permanent magnet assembly is disposed between the iron core and the first magnetic pole body by being combined. 5. A rotor having a rotating shaft integrally mounted thereon and a stator arranged to cover an outer peripheral surface of the rotor with a gap therebetween, the rotor comprising: an iron core connected to the rotating shaft;
A first pole body disposed radially outward of the core and having a plurality of first claws; permanent magnet means disposed between the core and the first pole body; substantially adjacent to the core. A second pole body connected to the rotating shaft and having a plurality of second claws, wherein each of the first and second claws is alternately arranged in a circumferential direction; An annular permanent magnet assembly is disposed between the first magnetic pole body and the permanent magnet assembly. The permanent magnet assembly is integrally formed by the outer protective case and the permanent magnet means mounted on the inner peripheral surface of the outer protective case. A claw-pole type rotating machine characterized by comprising: 6. The outer protective case is formed of a cylindrical member, and the permanent magnet means is formed of a plurality of permanent magnets or cylinders each formed in an arc shape and arranged in a cylindrical shape as a whole. 6. The claw-pole type rotating machine according to claim 5, comprising one permanent magnet integrally formed. 7. A mounting hole is formed in the first magnetic pole body, and an inner peripheral surface of each of a plurality of permanent magnets arranged so as to form a cylindrical shape as a whole or one formed integrally to form a cylindrical shape. The inner peripheral surface of the permanent magnets is fitted to the outer peripheral surface of the iron core,
The permanent magnet assembly is disposed between the iron core and the first magnetic pole body by fitting the outer peripheral surface of the outer protective case into the mounting hole of the first magnetic pole body. The described claw-pole type rotating machine. 8. A case means including one end wall and the other end wall rotatably supported on the rotating shaft on both axial sides of the rotor, wherein the stator is supported by the case means, and the stator includes: The claw-pole type rotating machine according to claim 1 or 5, further comprising a dust cover that covers an outer surface portion not covered by the stator with a gap. 9. The dust cover according to claim 8, wherein the dust cover comprises a pair of cover members formed of plate members extending radially inward from both axial end portions of the stator along both axial side surfaces of the rotor. Claw pole type rotating machine. 10. The claw-pole type rotating machine according to claim 9, wherein each of the cover bodies is made of a non-magnetic material. 11. Each of the cover members has a disk portion having a hole formed in a central portion thereof for allowing the rotation shaft to pass therethrough with a gap, and an axial direction from a peripheral edge of the disk portion. A large-diameter portion is formed at both axial ends of the inner peripheral surface of the stator, and each of the cover bodies has an outer peripheral surface of the annular flange portion in a corresponding large-diameter portion of the stator. The claw-pole type rotating machine according to claim 9 or 10, which is mounted by being fitted. 12. The case means according to claim 8, wherein one end wall and the other end wall of the case means have at least one ventilation hole.
2. The claw-pole type rotary machine according to any one of 1. 13. The claw-pole type rotating machine according to claim 12, wherein a cooling fan is mounted on the rotating shaft near one end wall or the other end wall.