JP2003299292A - Rotating apparatus and method of manufacturing therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating apparatus that can improve ease of assembly of a rotor provided with a core comprising a plurality of members. <P>SOLUTION: The armature 3 of a DC motor 1, which is the rotating apparatus, comprises a core 7 with winding 10 wound in the teeth section 14, a commutator 8 to which is connected the end of the winding 10, and a rotation axis 6 to which is fastened the core 7 and the commutator 8. The core 7 comprises a first and second core sections 11, 12. The core 7 is formed by assembling together the first and second core sections 11, 12 after winding the winding 10 in the teeth sections 14 of the first and second core sections 11, 12. Each teeth section 14 is provided on the tip side with protrusions 21 formed to protrude in the axial direction, and the windings 10 wound around the teeth sections 14 are coiled around the protrusions 21. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine provided with a rotor in which a core for winding a winding is divided into a plurality of members and the members are assembled together.

[0002]

2. Description of the Related Art In a DC motor as a rotating device, an armature (rotor) is rotatably housed in a yoke. The armature includes a rotating shaft, a core fixed to the rotating shaft and around which a winding is wound, and a commutator (commutator) fixed to the rotating shaft and connected to a winding extending from the core. Prepare Further, a plurality of magnets are arranged on the inner peripheral surface of the yoke so as to face the armature. Then, a DC current supplied from a DC power supply (not shown) flows into the winding of the armature core through the brush and the commutator.
At this time, a rotating force is generated by the electromagnetic force of the winding and the magnetic force from the magnet, which causes the armature to rotate.

[0003]

By the way, the applicant of the present application, as shown in FIGS.
Has a divided structure composed of a first core portion 51 and a second core portion 52, and proposes a technique for suppressing vibration generated during motor driving (Japanese Patent Application No. 2002-50420). Specifically, a winding is wound in advance around the tooth portion 53 of the first core portion 51 and the tooth portion 53 of the second core portion 52,
Then, the armature core 50 is formed by laminating the first core portion 51 and the second core portion 52. Then, the ends of the windings of each tooth 53 are connected to the commutator.
With this configuration, the gap B (see FIG. 11) formed between the tips of the teeth portions 53 in the armature core 50 can be reduced, and thus the cogging torque caused by the gap B can be suppressed. Therefore, the vibration in the DC motor can be reduced. Further, since the space formed between the teeth portions 53 can be effectively used, the space factor of the winding can be increased, and the DC motor can be downsized.

However, when the armature core 50 is divided as described above, since the first core portion 51 and the second core portion 52 are assembled after winding the winding wire around each tooth portion 53, At the time of assembly, each tooth portion 53
The windings wound around may be frayed. In this case, when the winding is connected to the commutator, the winding needs to be rewound, which causes a problem that the assembling property deteriorates.

Incidentally, in Japanese Utility Model Laid-Open No. 7-20053 and Japanese Utility Model Laid-Open No. 61-74239, the winding wound around the core is prevented from fraying toward the outer peripheral side due to the centrifugal force when the armature rotates. The technology is disclosed. However, according to the technique of the publication, it is impossible to prevent the winding of the coil from being frayed when the first core portion 51 and the second core portion 52 are assembled.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a rotating machine capable of improving the assembling property of a rotor having a core composed of a plurality of members, and manufacturing thereof. To provide a method.

[0007]

According to a first aspect of the present invention, a core around which a winding is wound around a tooth portion and a commutator to which an end of the winding is connected are fixed to a rotating shaft. In a rotating device including a rotor, a core of the rotor is divided into two or more members, and a member including the teeth portion is wound around the teeth portion and then the member is replaced with another member. It is formed by assembling to a member,
The member including the tooth portion is provided with a protrusion that is formed so as to project in the axial direction from an axial end surface of the member and that is used to bind the winding wound around the tooth portion.

According to a second aspect of the present invention, in the rotating machine according to the first aspect, the core of the rotor has a ring portion having a first fitting portion and a second fitting portion. The first and second core portions are formed by teeth portions radially formed from the ring portion, and the first fitting portion of the first core portion and the second fitting portion of the second core portion are fitted to each other. And the first fitting portion of the second core portion and the second fitting portion of the first core portion are fitted to each other to stack the first core portion and the second core portion. The protrusion was formed for each part.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the rotating device described in the paragraph [3], the protrusion is disposed on the tip side of the tooth portion. According to a fourth aspect of the present invention, in the rotating device according to the third aspect, the protrusion is formed such that a tip end thereof is bent outward in the radial direction and has an L-shaped cross section.

According to a fifth aspect of the present invention, in the rotating device according to the third or fourth aspect, the protrusion is formed so as to be inclined radially outward with respect to the axial direction. According to a sixth aspect of the present invention, in the rotating device according to any one of the first to fifth aspects, the protrusion is arranged inside the outer peripheral surface of the core.

According to a seventh aspect of the present invention, in the rotating device according to any one of the first to sixth aspects, the protrusion is
The protrusion is provided so as to be higher than the height of the winding wound around the tooth portion.

According to an eighth aspect of the present invention, in the method for manufacturing a rotating machine according to any one of the first to seventh aspects, after winding a winding wire around the teeth portion, the winding wire is provided with the protrusion. The core is formed by binding each member to each other, and the core and the commutator are fixed to the rotating shaft. Then, the ends of the windings bound to the protrusions are connected to the commutator.

(Operation) According to the invention described in claim 1,
A protrusion is formed in the axial direction in the member including the tooth portion, and the winding wound around the tooth portion is entangled with the protrusion, whereby the winding of the tooth portion is prevented from being unraveled. Therefore, when the winding is connected to the commutator after the core is assembled, it is not necessary to rewind the winding as in the prior art, and the assembling property of the rotor can be improved.

According to the second aspect of the present invention, the core of the rotor is formed by laminating the first core portion and the second core portion.
Since it is composed of one member, the number of parts can be reduced and the assembling can be simplified.

According to the third aspect of the invention, since the protrusion is disposed on the tip side of the tooth portion, the protrusion does not interfere when connecting the winding to the commutator, and is practically used. It will be preferable.

According to the invention described in claim 4, the projections are:
Since the tip end thereof is bent outward in the radial direction and has an L-shaped cross section, the winding can be securely entangled with the protrusion.
Further, the same effect can be obtained by bending the tips of the protrusions at an acute angle so that the cross-section has a key shape.

According to the invention described in claim 5, the protrusion is
Since it is formed so as to incline radially outward with respect to the axial direction, the winding can be more reliably entangled with the protrusion. Further, in the rotating device, since the clearance between the core and the magnet facing the outer peripheral surface of the core is narrow, the protrusion is arranged inside the outer peripheral surface of the core as in the invention according to claim 6. Then, it is preferable for practical use.

According to the invention as set forth in claim 7, since the protrusion is provided so as to be higher than the height of the winding wound around the tooth portion, there is a space for entwining the winding with the protrusion. You can secure enough.

According to the invention described in claim 8, the winding is wound around the tooth portion, and after the winding is entwined with the protrusion, the cores are formed by assembling the respective members. Further, after the core and the commutator are fixed to the rotating shaft, the ends of the windings entwined with the protrusions are connected to the commutator. By thus winding the windings around the protrusions, it is possible to prevent the windings wound around the teeth from fraying and to improve the assembling property of the rotor.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments in which the present invention is embodied in a DC motor as a rotating device will be described below with reference to the drawings.

As shown in FIG. 1, the DC motor 1 of this embodiment includes a stator 2 and a rotor (armature) 3. The stator 2 includes a bottomed cylindrical yoke 4 and a plurality of magnets 5 arranged in the yoke 4. In the present embodiment, the six magnets 5 are equiangular with the inner peripheral surface of the yoke 4. Placed and fixed at intervals. The magnet 5 is a neodymium-based magnet made of neodymium, iron, and boron. The armature 3 is rotatably supported inside the magnets 5.

FIG. 2 shows a sectional view of the armature 3. The armature 3 includes a rotating shaft 6, a core 7 fixed to the rotating shaft 6, and a commutator (commutator) 8, and both ends of the rotating shaft 6 are rotatably supported in the yoke 4 via bearings (not shown). ing. The commutator 8 has a plurality of segments 9, and in this embodiment, 24 segments 9 are provided at equal angular intervals. A brush (not shown) is arranged at a position adjacent to the commutator 8.
Then, a DC current supplied from a DC power source (not shown) flows into the winding 10 wound around the core 7 of the armature 3 via the brush and the commutator 8. At this time, the electromagnetic force of the winding wire 10 and the magnetic force from the magnet 5 generate a rotational force, which causes the armature 3 to rotate.

In the present embodiment, the core 7 of the armature 3
Is composed of the first core portion 11 shown in FIG. 3 and the second core portion 12 shown in FIG. 4, and is formed by assembling the first core portion 11 and the second core portion 12 with each other.

Incidentally, FIG. 3A and FIG.
It is the figure which looked at the core part 11 and the 2nd core part 12 from the commutator 8 side, and FIG.3 (b) and FIG.4 (b) is sectional drawing of the 1st core part 11 and the 2nd core part 12.

More specifically, as shown in FIG. 3, the first core portion 11 has a ring portion 13 having a center hole 13a and a radial portion extending outward from the outer periphery of the ring portion 13 at equal angular intervals (90 °). It is provided with four teeth portions 14 extended to the. As shown in FIG. 4, the second core portion 12 also has a ring portion 13 having a center hole 13 a, like the first core portion 11,
Equal angular intervals (90 °) outward from the outer circumference of the ring portion 13
And four teeth portions 14 extending radially.

In the first core portion 11 and the second core portion 12, each tooth portion 14 is formed so as to have a thickness (axial length) that is almost twice that of the ring portion 13. Figure 3
As shown in (b), in the first core portion 11, the ring portion 13 is provided below the center in the axial direction,
As shown in (b), in the second core portion 12, the ring portion 13 is provided above the axial center thereof.

In this embodiment, the second core portion 1 shown in FIG.
When 2 is arranged upside down, the configuration (the shape of the ring portion 13 and the teeth portion 14 and the like) becomes the same as that of the first core portion 11 of FIG. These first core portion 11 and second core portion 12
The ring portion 13 and the tooth portion 14 are integrally formed by compression molding magnetic powder.

The teeth portion 14 of the first core portion 11 and the second core portion 12 includes a winding winding portion 14a and a tip portion 14b formed at one end (tip) of the winding winding portion 14a. . In addition, the teeth portion 14 includes a winding winding portion 14a.
An insulator 18 that is insert-molded according to the shapes of the front end portion 14b and the front end portion 14b is provided.

The insulator 18 is a winding winding portion 18
a, a tip insulating portion 18b, and a fitting end insulating portion 18c, and a protrusion 21 extending in the axial direction of the motor 1 is formed on the tip insulating portion 18b on the tooth tip side. The protrusion 21 is on one end face side in the axial direction of the first and second core portions 11 and 12 (on the commutator 8 side,
It is arranged only on the upper side in FIGS. 3B and 4B. Further, the protrusion 21 is provided on each of the tooth portions 14 by two.
Individually formed.

In the first and second core portions 11 and 12,
The winding 10 is wound around the winding winding portion 14a of the tooth portion 14 via an insulator 18 (winding winding portion 18a). Here, two windings 10 are simultaneously wound around each tooth 14 by concentrated winding. The winding wire 10 is drawn radially outward along the axial end surface on the commutator 8 side and is bound to the protrusion 21. At this time, the winding 10 is wound around the protrusion 21 in a state in which a predetermined tension is applied so that the winding 10 is not unraveled from the tooth portion 14. The direction in which the protrusion 21 is entangled (winding direction) is a direction intersecting with the winding direction of the winding wire 10 in the tooth portion (a direction substantially perpendicular to the axial direction).

FIG. 5 shows an enlarged sectional view of the protrusion 21. As shown in FIG.
1a is bent outward in the radial direction and has an L-shaped cross section. The protrusion 21 is provided such that its tip 21a is located inside the outer peripheral surface of the core 7 (teeth portion 14). In addition, the protrusion 21 is formed on the tooth portion 14
It is provided so as to be higher than the height of the winding 10 wound around, and a space S for entwining the winding 10 is sufficiently secured.

At the time of assembling the core 7, each tooth portion 1
The first core portion 11 (see FIG. 3) and the second core portion 12 (see FIG. 4) in which the winding wire 10 is wound around the coil 4 are opposed to each other, and the axial positions are set so that the ring portions 13 overlap. Match. Furthermore, the position of the teeth portion 14 is set to 45 ° in the circumferential direction.
The first core portion 11 and the second core portion 12 are assembled to each other in the shifted state. At this time, the ring portion 13 of the first core portion 11 is replaced by the tooth portion 14 of the second core portion 12.
The ring portion 13 of the second core portion 12 is fitted inside the tooth portion 14 of the first core portion 11.

More specifically, the outer peripheral surface 13b of the ring portion 13 of the first core portion 11 and the inner side surface of the tooth portion 14 of the second core portion 12 (inner side surface on the lower side of the tooth portion in FIG. 4B) 14c. Are brought into contact with each other, and the contacted portion is fixed with an adhesive or the like. On the other hand, the outer peripheral surface 13b of the ring portion 13 of the second core portion 12 and the inner side surface of the tooth portion 14 of the first core portion 11 (the inner side surface on the upper side of the tooth portion in FIG. 3B) are brought into contact with each other, The contact portion is fixed by an adhesive or the like. Thereby, as shown in FIG. 1, the core 7 in which the eight tooth portions 14 are arranged at equal angular intervals is manufactured.

In the present embodiment, in the first and second core portions 11 and 12, the outer peripheral surface 13b of the ring portion 13 located between the tooth portions 14 corresponds to the first fitting portion, and the teeth. The inner side surface 14c of the portion 14 corresponds to the second fitting portion. The outer peripheral surface 13b of the ring portion 13 serving as the first fitting portion and the inner side surface 14c of the tooth portion 14 serving as the second fitting portion have the same length in the circumferential direction, specifically, the angle θ (45).
(° = 360 ° / predetermined angle corresponding to the number of teeth). Then, the first and second core portions 1
When 1 and 12 are assembled with each other to form the core 7,
Since the side surfaces of the adjacent tooth portions 14 on the base end side are brought into contact with each other, the first core portion 11 and the second core portion 12 are immovable in the circumferential direction.

After that, as shown in FIGS. 1 and 2, the core 7 and the commutator 8 are fixed to the rotary shaft 6, and the end of the winding 10 entwined with the protrusion 21 is connected to the commutator 8 (specifically, Each segment 9 is connected by soldering to a connecting portion 9a) which is provided on the outside in the radial direction. Here,
The winding 10 wound around each tooth portion 14 has one end portion and the other end portion thereof connected to the connection portion 9 a of the adjacent segments 9 via separate protrusions 21. In this way, the windings 10 of the core 7 are connected to the commutator 8 to manufacture the armature 3.

As described in detail above, this embodiment has the following features. (1) Protrusion 2 that protrudes in the axial direction at the tooth portion 14
1 was formed so that the winding wire 10 wound around the tooth portion 14 was entangled. In this case, the first and second core portions 1
When assembling 1, 12 from the tooth portion 14 to the winding 10
It is possible to prevent fraying. As a result, the first and second
When the winding 10 is connected to the commutator 8 after the core portions 11 and 12 are assembled, it is not necessary to rewind the winding 10 as in the conventional technique, and the assembling property of the armature 3 can be improved.

(2) The core 7 of the armature 3 is the first core portion 1
Since the first core portion 12 and the second core portion 12 are laminated and composed of two members, the number of parts can be reduced and the assembling can be simplified.

(3) Since the protrusion 21 is disposed on the tip side of the tooth portion 14, when the winding 10 is connected to the commutator 8, the protrusion 21 does not interfere with the assembling of the armature 3. Can be improved.

(4) The protrusion 21 is formed to have an L-shaped cross section with its tip 21a bent outward in the radial direction. In this case, since the protrusion 21 has a shape bent to the opposite side (outside) of the commutator 8 side (inside), the winding 10 can be securely entangled with the protrusion 21, and the winding 10 can be connected to the teeth portion 14. It becomes difficult to fray.

(5) The protrusion 21 is arranged inside the outer peripheral surface of the core 7. As shown in FIG. 1, the core 7,
Since the clearance between the magnet 5 facing the outer peripheral surface of the core 7 is small, it is practically preferable to dispose the protrusion 21 inside the outer peripheral surface of the core 7 as in the present embodiment.

(6) Winding 10 wound around the teeth portion 14
By forming the protrusion 21 so as to be higher than the height of S1, the space S for binding the winding 10 to the protrusion 21 can be sufficiently secured.

(7) The direction in which the winding 10 is entangled with the protrusion 21 is the direction intersecting the winding direction of the winding 10 in the tooth portion 14. In this case, it is possible to prevent the winding 10 from fraying from the teeth portion 14, and to easily connect the end of the winding 10 entwined with the protrusion 21 to the commutator 8.

(8) The core 7 of the armature 3 has eight teeth portions 14, and six magnets 5 are arranged at equal angular intervals on the inner peripheral surface of the yoke 4 in which the armature 3 is housed. Placement is fixed. That is, the DC motor 1 of this embodiment is a rotating device having 6 poles and 8 slots. In the motor 1, since the cogging torque can be reduced and the vibration can be prevented, it is practically preferable to form the protrusion 21 for binding the winding 10 to improve the assembling property.

In addition to the above, the present invention can be embodied in the following forms. ○ In the above embodiment, the first and second core portions 11,
The four teeth portions 14 are formed on each of the teeth 12, and the core 7 including the first and second core portions 11 and 12 has the eight teeth portions 14, but is not limited to this. is not. For example, the first and second core portions 1
1 and 12, respectively, other than 4 (for example, 3, 5
The present invention may be applied to a core having more than eight teeth 14 and having teeth 14 other than eight.

In the above embodiment, the core 7 of the armature 3 is divided into two members, the first and second core portions 11 and 12, but the present invention is not limited to this. It may be embodied in a core that is divided into three or more members. As an example, the core 31 shown in FIG. 6 includes a ring portion 33 having a plurality of teeth fitting recesses 32 and a teeth portion 34 fitted in the teeth fitting recess 32. That is, the core 31 is a core that is divided into 9 members, which are the ring portion 33 and the eight tooth portions 34.

The tooth fitting concave portions 32 are formed at equal angular intervals on the outer peripheral surface of the ring portion 33. The tooth portion 34 is formed on the winding winding portion 34a, a tip portion 34b formed at one end (tip end) of the winding winding portion 34a, and the other end (base end) of the winding winding portion 34a. Fitting projection 34c
It has and. Then, the projection 3 for binding the winding 10 wound around the winding winding portion 34a to the tip portion 34b.
5 is formed. The protrusion 35 is provided so as to project in the axial direction and has a tip bent outward in the radial direction (cross section L).
(Shaped). In addition, in each tooth portion 34 of the core 31, the winding winding portion 34a around which the winding 10 is wound and the tip end portion 34b including the protrusion 35 are subjected to an insulating treatment by resin molding.

When assembling the armature core 31, first, the winding 10 is wound around the winding winding portion 34a of each tooth portion 34 by a concentrated winding, and then the winding 10 is projected. Three
Attach to 5. Next, the fitting protrusions 34c of the teeth portions 34 are fitted into the teeth fitting recesses 32 of the ring portion 33 to form the core 31. After that, the core 31 and the commutator 8 are fixed to the rotary shaft 6, and the ends of the windings 10 entwined with the protrusion 35 are connected to the commutator 8. As a result, the armature 3 having the core 31 is manufactured. Even in this case, when the core 31 is assembled, it is possible to prevent the winding 10 from being frayed from the teeth portion 34, and the assembling property of the DC motor can be improved.

A protrusion 21 for binding the winding wire 10
Is not limited to one having an L-shaped cross section as shown in FIG. For example, like the projection 41 shown in FIG. 7, the tip may be bent at an acute angle to form a key-shaped cross section. In addition, like the protrusion 42 shown in FIG.
It may be formed so as to be inclined radially outward with respect to the axial direction. Of course, the outer peripheral surface of the projection may be formed with a recess for hooking the winding 10. With this configuration, the winding 10 can be securely entangled with the protrusions 41 and 42.

In the conventional core 50 shown in FIGS. 11 and 12, a protrusion for binding the winding wound around the tooth portion 53 may be formed. In the core 50 shown in FIGS. 11 and 12, the first and second core portions 51 and 52 include a tooth portion 53 and a ring portion 54. Teeth part 53
Is composed of an integral tooth 55 radially formed integrally with the outer periphery of the ring portion 54, and a split tooth 56 fixed to the integral tooth 55. On the outer peripheral surface of the ring portion 54, a teeth fitting concave portion 57 as a first fitting portion is formed at an intermediate position between the adjacent integral teeth 55.
A fitting protrusion 58 as a second fitting portion is formed at the base end of the split tooth 56. Then, the fitting protrusion 58 on the split tooth 56 of the first core portion 51 is attached to the second core portion 5.
The second core portion 52 is fitted into the second tooth fitting concave portion 57.
By fitting the fitting protrusion 58 of the split tooth 56 of the above into the tooth fitting recess 57 of the first core portion 51,
The core 50 is formed.

In the core 50, a protrusion is formed on one axial end surface side (upper side in FIGS. 11 and 12). That is, in the first core portion 51, a projection protruding in the axial direction is formed on the tip side of the integral tooth 55, and in the second core portion 52, a projection is formed on the tip side of the split tooth 56. And
By winding the winding wound around the tooth portion 53 around the protrusion, the winding of the tooth portion 53 can be prevented from being unraveled and the assembling property of the DC motor can be improved.

In the above embodiment, the core 7 of the armature 3 is
Is divided into the first core portion 11 and the second core portion 12, the space factor of the winding 10 can be increased, and the DC motor 1 can be downsized. Since the motor mass decreases with the downsizing, it is necessary to use a magnet having a magnetic flux density suitable for the mass. Specifically, the optimum value of the magnetic flux density corresponding to the motor mass is higher than that of the ferrite magnet used in the conventional DC motor. Therefore, the DC motor 1 in the above embodiment
In, a neodymium magnet having a magnetic flux density higher than that of a ferrite magnet is used. However, when the magnet 5 is formed by using a neodymium-based magnet, the magnetic flux density may be higher than necessary with respect to the optimum value corresponding to the motor mass, and the original performance of the magnet 5 cannot be effectively used. There is a concern. As a countermeasure, the magnet 45 of FIG. 9 or the magnet 46 of FIG.
Can be used.

The magnet 45 shown in FIG. 9 is a hybrid type magnet in which first magnetic portions 45a and second magnetic portions 45b are alternately provided in the circumferential direction. In addition, FIG.
The magnet 46 shown in is a hybrid magnet in which first magnetic portions 46a and second magnetic portions 46b are alternately provided in the axial direction. In the magnets 45 and 46, the first magnetic portions 45a and 46a are made of neodymium magnets, and the second magnetic portions 45b and 46b are magnetic bodies having magnetic flux density weaker than that of neodymium magnets (for example, ferrite magnets).
Alternatively, it is made of a non-magnetic material. As described above, by using the hybrid type magnets 45 and 46 in which the neodymium magnet and another material are combined, it is possible to realize the optimum magnetic flux density according to the motor mass.

Alternatively, a neodymium-based magnetic material may be mixed with a ferrite-based magnetic material or a non-magnetic material, and the mixed material may form a magnet having a magnetic flux density according to the motor mass.

In the above embodiment, the DC motor 1 is embodied, but it may be embodied in a rotating device other than the DC motor 1 (for example, a DC generator). The technical idea that can be understood from the above embodiment will be described.

(A) A plurality of the teeth portions are formed at equal angular intervals, and the first fitting portion is formed between the teeth portions adjacent to each other of the ring portion. The rotating device according to claim 2.

(B) In the first and second core portions,
The rotating device according to claim 2, wherein each of the teeth portion and the first fitting portion is formed in four pieces. (C) 6 is provided on the inner peripheral surface of the yoke in which the rotor is housed.
The rotating device according to (B) above, in which individual magnets are arranged.

(D) The direction in which the winding is entangled with the protrusion is a direction intersecting with the winding direction of the winding in the teeth portion. Rotating equipment.

(E) The rotating device according to any one of claims 1 to 7, wherein the protrusion is formed on an insulator arranged in the tooth portion. (F) A plurality of magnets arranged so as to face the rotor, the magnets including a first magnetic portion formed of the predetermined magnetic body and a magnetic body having a magnetic flux density lower than that of the predetermined magnetic body. Or a second magnetic part made of a non-magnetic material, wherein the first magnetic part and the second magnetic part are alternately arranged along at least one of the circumferential direction and the axial direction. The rotating device according to any one of 1 to 7.

(G) A plurality of magnets arranged so as to face the rotor are provided, and the magnets combine the predetermined magnetic material with another material having a magnetic flux density lower than that of the magnetic material. The rotating device according to any one of claims 1 to 7, wherein

(H) The method for manufacturing a rotating device according to claim 2, wherein windings are wound around the first and second teeth portions and then the windings are bound to the protrusions. In that state, the first core portion and the second core portion are laminated to form the core, and further, after fixing the core and the commutator to the rotating shaft, the end of the winding entwined with the protrusion. A method for manufacturing a rotating device, comprising connecting the parts to a commutator.

[0061]

As described in detail above, according to the present invention,
It is possible to improve the assembling property of the rotor including the core formed of a plurality of members.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a DC motor of this embodiment.

FIG. 2 is a sectional view showing an armature.

3A is a plan view of a first core portion, and FIG. 3B is a cross-sectional view of the first core portion.

4A is a plan view of a second core portion, and FIG. 4B is a sectional view of the second core portion.

FIG. 5 is an enlarged cross-sectional view showing the shape of a protrusion.

FIG. 6 is a plan view showing an armature core of another example.

FIG. 7 is an enlarged cross-sectional view showing the shape of a protrusion of another example.

FIG. 8 is an enlarged cross-sectional view showing the shape of a protrusion of another example.

FIG. 9 is a sectional view showing a magnet of another example.

FIG. 10 is a sectional view showing a magnet of another example.

FIG. 11 is a perspective view showing a conventional armature core.

FIG. 12 is an exploded perspective view showing a conventional armature core.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... DC motor as rotating equipment, 3 ... Armature as rotor, 6 ... Rotating shaft, 7 ... Core, 8 ... Commutator, 1
0 ... Winding, 11 ... 1st core part, 12 ... 2nd core part, 13
... Ring part, 13a ... Outer peripheral surface as first fitting part, 1
Reference numeral 4 ... Teeth portion, 14c ... Inner side surface as second fitting portion, 21 ... Protrusion, 31 ... Core, 32 ... Teeth fitting concave portion as first fitting portion, 33 ... Ring portion, 34 ... Teeth portion , 34c ... fitting protrusions as second fitting portions, 35,
41, 42 ... Protrusion, 50 ... Core, 51 ... First core part, 5
2 ... 2nd core part, 53 ... Teeth part, 54 ... Ring part,
57 ... Teeth fitting concave portion as first fitting portion, 58 ...
A fitting protrusion as a second fitting part.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kaname Egawa             Asumo Corporation, 390 Umeda, Kosai City, Shizuoka Prefecture             In the company F-term (reference) 5H002 AA07 AB01 AB08 AC08 AE07                       AE08                 5H603 AA03 AA09 BB01 BB04 BB12                       CA02 CA05 CA10 CB04 CB18                       CB26 CC11 CC17 CD02 CD04                       CD21 CE01 EE11 EE12 EE13                 5H604 AA05 AA08 BB01 BB07 BB14                       CC02 CC05 CC16 PB03 QB14

Claims (8)

[Claims] 1. A rotating machine comprising a rotor having a core around which a winding is wound around a tooth portion and a commutator to which an end of the winding is connected, fixed to a rotating shaft. The core is formed by dividing the core into two or more members, and winding the winding around the tooth portion of the member including the tooth portion and then assembling the member to another member. A rotary machine, comprising a projection for axially projecting from an axial end surface of a member including a portion, the projection including the winding portion wound around the tooth portion. 2. The rotating machine according to claim 1, wherein the rotor core has a ring portion having a first fitting portion and a second fitting portion, and is formed radially from the ring portion. First and second core portions each including a tooth portion to be formed, and a first core portion of the first core portion.
The second fitting portion of the second core portion and the second fitting portion of
The first fitting portion of the core portion and the second fitting portion of the first core portion are fitted to each other to stack the first core portion and the second core portion, and the protrusion is provided for each tooth portion. A rotating device characterized by being formed. 3. The rotating device according to claim 1, wherein the protrusion is provided on a tip side of the tooth portion. 4. The rotating device according to claim 3, wherein the protrusion is formed such that a tip end thereof is bent radially outward and an L-shaped cross section is formed. 5. The rotating device according to claim 3, wherein the protrusion is formed so as to incline radially outward with respect to the axial direction. 6. The rotating device according to claim 1, wherein the protrusion is arranged inside the outer peripheral surface of the core. 7. The rotating device according to claim 1, wherein the protrusion is provided so as to be higher than a height of a winding wound around the tooth portion. Rotating equipment. 8. The method for manufacturing a rotating device according to claim 1, wherein after winding the winding wire around the teeth portion, the winding wire is entangled with the protrusion to form each member. The core is formed by assembling the core, and the core and the commutator are fixed to a rotating shaft, and the end of the winding wound around the protrusion is connected to the commutator. Production method.