JP2004088944A - Rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the efficiency of work of assembling bobbins into an outer core and to prevent contact between the coil wound on one bobbin and the coils wound on the adjacent bobbins. <P>SOLUTION: A rotating electric machine 10 comprises a plurality of bobbins 18 installed in the outer core 12; coil-winding portions 24 on which coils 20 are wound; peripheral walls 26 formed orthogonally on the outer circumferential side of the coil-winding portions 24; engaging grooves 36a and 36b formed on the inner wall faces 38 of the peripheral walls 26; first and second engaging portions 28 and 30 formed on the outer circumference side of the coil-winding portions 24; and cover members 32a and 32b which are extended in such a direction that they separate away from the first and second engaging portions 28 and 30, and encircle the coils 20 by own bending action. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotating electric machine such as an electric motor or a generator, and more particularly to a rotating electric machine in which a plurality of bobbins around which coils constituting a stator are wound are annularly disposed inside.
[0002]
[Prior art]
2. Description of the Related Art In recent years, in a rotating electric machine having a stator, there has been a tendency to increase a coil space factor of a coil wound around a bobbin due to a demand for miniaturization of an apparatus and high efficiency of motor characteristics. Therefore, in order to increase the coil space factor, a method in which a coil is concentratedly wound around a magnetic pole piece provided on an inner core via a bobbin has been adopted.
[0003]
In the method of concentratedly winding the coil, the coil is wound around a bobbin made of an insulating material, and the bobbin around which the coil is wound is attached to a pole piece of an inner core, and then the inner core is placed inside the outer core. By fitting, the space factor of the coil can be increased, and the coil winding operation can be easily performed.
[0004]
After an operator winds the coil on the bobbin, the end of the coil is fixed using a tape, an adhesive, or the like so that the wound coil is not loosened.
[0005]
[Problems to be solved by the invention]
By the way, in a rotating electric machine having a stator according to the related art, as the coil space factor of the coil wound around the bobbin is increased, the coil amount wound around the bobbin is increased because the coil is expanded. , The bobbin is displaced radially outward. For this reason, there is a problem that assembling workability when fitting a plurality of bobbins into the inside of the outer core is reduced.
[0006]
Further, since the coil amount increases as the coil space factor of the coil increases, the separation distance between the coil wound on the bobbin and the coil wound on the adjacent bobbin decreases. As a result, there is a possibility that the coils approaching each other come into contact with each other. When the coils come into contact with each other, the coils may be rubbed by the influence of vibration or the like, and the insulating coating on the surface of the coil may be peeled.
[0007]
Furthermore, there is a problem that the operation of fixing the coil using a tape, an adhesive or the like after winding the coil around the bobbin is complicated.
[0008]
The present invention has been made in consideration of the above-described various inconveniences and the like. Even when the coil is wound, the bobbin does not displace in a radially outward direction, and contacts the coil of the adjacent bobbin. It is an object of the present invention to provide a rotating electric machine having a stator capable of preventing the above and improving the workability of assembling the bobbin.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a rotating electric machine including a stator and a rotor,
A coil is wound around a plurality of magnetic pole bodies provided on the inner core through a bobbin made of an insulating material, and the inner core on which the bobbin is mounted is fitted to an annular outer core,
The bobbin has a cylindrical portion around which the coil is wound outside and the magnetic pole body is inserted inside,
An engaging portion formed in the cylindrical portion so as to face another adjacent bobbin, and engaging the bobbin and another adjacent bobbin with each other;
With
The displacement of the bobbin in the radial direction is restricted under the action of engaging the engaging portion with the engaging portion of another adjacent bobbin.
[0010]
According to the present invention, the engaging portion is formed so as to face the direction of the other bobbin adjacent to the cylindrical portion, and the engaging portions of the bobbin and the other bobbin adjacent to each other are engaged with each other. . Therefore, even when the coil is concentratedly wound around the cylindrical portion, the bobbin is not displaced radially outward by the wound coil, so that the bobbin can be easily assembled into the outer core. Can be improved.
[0011]
Further, the bobbin is connected to the tubular portion, and is formed at a position facing the cover member with the cover member extending in a direction away from the tubular portion and sandwiching the tubular portion, And an engagement groove with which an end of the cover member is engaged. After the coil is wound around the tubular portion, the cover member is connected to the tubular portion by using a connection portion with the tubular portion as a fulcrum. And the end of the cover member is engaged with the engagement groove.
[0012]
Therefore, since the coil wound around the cylindrical portion is surrounded by the cover member and does not contact the outside, contact with the coil wound around the adjacent bobbin is prevented, and the coil is suitably protected. be able to. Further, when the coil is wound around the bobbin, the coil is prevented from being loosened because the coil is surrounded by the cover member. Therefore, a complicated operation of fixing the coil wound around the bobbin using a tape, an adhesive, or the like becomes unnecessary.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of a rotating electric machine according to the present invention will be described in detail below with reference to the accompanying drawings.
[0014]
In FIG. 1, reference numeral 10 indicates a rotating electric machine according to an embodiment of the present invention.
[0015]
The rotating electric machine 10 has a stator 11. The stator 11 has an annular outer core 12 and a plurality of teeth (magnetic pole bodies) 14 mounted inside the outer core 12 and protruding in a radially outward direction to be magnetic poles. And an inner core 16 having a plurality of bobbins 18 press-fitted into the inner peripheral side of the outer core 12 and mounted on the tooth portions 14, and a coil 20 wound around the bobbin 18. The outer core 12 and the inner core 16 are integrally crimped with teeth 14 formed by laminating a plurality of steel plates by crimping portions 22a and 22b.
[0016]
As shown in FIGS. 2 and 3, the bobbin 18 made of a resin material is provided at a substantially central portion and wound around a coil 20 (see FIGS. 4 and 5). ) 24, a peripheral wall 26 provided on the outer peripheral side of the stator 11 (see FIG. 1) perpendicular to the coil winding portion 24, and bobbins 18a and 18b adjacent on the inner peripheral side of the stator 11 (see FIG. 5). ), And cover members 32a, 32b extending in a direction away from the first and second engaging portions 28, 30.
[0017]
As shown in FIG. 5, the inside of the coil winding portion 24 is formed in a hollow shape, and the tooth portion 14 of the inner core 16 serving as a magnetic pole is inserted therein. Since the bobbin 18 is formed of a resin material, the teeth 14 provided inside the coil winding portion 24 are insulated from the coil 20 wound around the coil winding portion 24. In state.
[0018]
The coil 20 wound around the coil winding portion 24 is composed of a wire 34 having an insulating coating on the outer peripheral surface.
[0019]
As shown in FIGS. 3 to 5, the peripheral wall 26 is formed so as to protrude by a predetermined width from the coil winding portion 24, and an inner wall surface 38 facing the cover members 32 a and 32 b is provided near a tip end thereof. Engagement grooves 36a and 36b recessed by a predetermined depth are formed on the sides. The cover members 32a and 32b are bent at a predetermined angle toward the coil winding portion 24 with a connection portion (connection portion) 40 between the first and second engagement portions 28 and 30 as a fulcrum. The tips of the cover members 32a, 32b are engaged with the engagement grooves 36a, 36b. The dimensions of the engaging grooves 36a and 36b in the width direction are substantially equal to or slightly larger than the thickness of the cover members 32a and 32b.
[0020]
Tapered portions 41 inclined at a predetermined angle toward the coil winding portion 24 are formed at both ends of the peripheral wall 26.
[0021]
The first engaging portion 28 is formed to protrude to the right of the coil winding portion 24, and the second engaging portion 30 is formed to protrude to the left of the coil winding portion 24.
[0022]
The first and second engaging portions 28 and 30 are each provided with an inner wall surface 42 formed on the side of the peripheral wall 26 perpendicularly to the coil winding portion 24, and the inner peripheral side of the stator 11 has an inner peripheral surface thereof. It is formed in a tapered shape whose diameter increases toward the side. That is, since the coil winding portion 24 has the peripheral wall 26 on the outer peripheral side and the inner wall surfaces 42 of the first and second engaging portions 28 and 30 on the inner peripheral side, the coil winding portion 24 Are surrounded by two planes perpendicular to the three directions.
[0023]
The first engaging portion 28 has a first engaging claw 44 protruding toward the outer peripheral side, and the second engaging portion 30 has a second engaging claw 44 protruding toward the inner peripheral side. An engagement claw 46 is formed.
[0024]
The first engaging claw 44 is formed in a shape to engage with the second engaging claw 46 of the adjacent bobbin 18, and the second engaging claw 46 is engaged with the first engaging claw of the bobbin 18 adjacent on the opposite side. It is formed in a shape that engages with the dowel 44. That is, the first engagement claw 44 and the second engagement claw 46 are formed in a paired shape.
[0025]
Plate-shaped cover members 32a and 32b are connected to the ends of the inner wall surfaces 42 of the first and second engagement portions 28 and 30 in a direction away from the coil winding portion 24, respectively. ing.
[0026]
The cover members 32a and 32b are formed from an insulating material, and a predetermined distance on the first and second engagement portions 28 and 30 is a thin portion 48 formed further thinner. The thin portion 48 is provided on substantially the same plane as the inner wall surfaces 42 of the first and second engaging portions 28 and 30, and the inner peripheral surface side of the stator 11 is determined by the cover members 32 a and 32 b with respect to the inner wall surface 42. It is formed thinner by the thickness.
[0027]
Further, the cover members 32a, 32b are bent toward the outer peripheral side of the stator 11 or the coil winding portion 24 with the connecting portion 40 between the thin portion 48 and the first and second engaging portions 28, 30 as a fulcrum. It is provided as possible.
[0028]
That is, by providing a thin portion 48 formed thinner than other portions of the cover members 32a, 32b near the first and second engagement portions 28, 30 of the cover members 32a, 32b, the cover member 32a , 32b can be partially reduced, so that the cover members 32a, 32b can be easily bent toward the coil winding portion 24 (see FIG. 5).
[0029]
Further, when the cover members 32a and 32b are bent in the direction of the coil winding portion 24 with the connecting portion 40 between the first and second engaging portions 28 and 30 and the thin portion 48 as a fulcrum, the cover member 32a , 32b are engaged with the engaging grooves 36a, 36b of the peripheral wall 26.
[0030]
On the side surfaces of the first and second engaging portions 28 and 30 where the cover members 32a and 32b are connected, tapered portions 50 inclined at a predetermined angle toward the inner peripheral side of the stator 11 are formed.
[0031]
The rotating electric machine 10 according to the embodiment of the present invention is basically configured as described above. Next, the coil 20 is wound around the coil winding portion 24 of the bobbin 18, and A method of mounting the bobbin 18 inside the outer core 12 will be described.
[0032]
First, as shown in FIG. 4, the wire 34 is wound around the coil winding portion 24 of the bobbin 18. At this time, since the coil winding portion 24 is surrounded in three directions by the peripheral wall 26 and the first and second engaging portions 28 and 30, the wire 34 wound around the coil winding portion 24 It does not protrude to the outer peripheral side and the inner peripheral side.
[0033]
Next, as shown in FIG. 5, the cover members 32a and 32b are each bent at a predetermined angle toward the coil winding portion 24 with the connection portion 40 as a fulcrum. Then, the front ends of the bent cover members 32a and 32b are engaged with the engagement grooves 36a and 36b of the inner wall surface 38 of the peripheral wall 26, respectively. Therefore, the coil 20 wound around the coil winding portion 24 is in a state surrounded by the peripheral wall 26, the inner wall surfaces 42 of the first and second engagement portions 28 and 30, and the cover members 32a and 32b.
[0034]
As a result, the ends of the coil 20 wound around the bobbin 18 by the cover members 32a and 32b are not frayed, and the assembling workability when the bobbin 18 is mounted on the tooth portion 14 of the inner core 16 is improved. I do.
[0035]
In other words, when the coil 20 is wound around the bobbin 18, even if the operator releases the gripping state of the end of the coil 20, the coil member 20 is prevented from being loosened by the surrounding cover members 32a and 32b. Therefore, a complicated operation for fixing the coil 20 wound around the bobbin 18 using a tape, an adhesive, or the like is not required.
[0036]
Next, the bobbin 18 in a state where the coil 20 is surrounded is mounted on the tooth portion 14 of the inner core 16. Then, the adjacent bobbins 18 a and 18 b around which the coil 20 is wound are mounted on the adjacent tooth portions 14 of the inner core 16. At this time, the first engagement claw 44 of the bobbin 18 is engaged with the second engagement claw 46 of the adjacent bobbin 18b, and the second engagement claw 46 formed on the opposite side of the first engagement claw 44 is formed. Is engaged with the first engaging claw 44 of the bobbin 18a adjacent on the opposite side.
[0037]
This prevents the bobbin 18 around which the coil 20 is wound from being displaced radially outward when the bobbin 18 is connected to the plurality of adjacent bobbins 18a and 18b.
[0038]
Then, as shown in FIG. 1, the inner core 16 to which the nine bobbins 18, 18a, and 18b are attached is press-fitted into the outer core 12, and the nine bobbins 18, 18a around which the coil 20 is wound. , 18b are disposed annularly inside the outer core 12. At that time, the tapered portions 41, 50 of the bobbins 18, 18a, 18b can be easily press-fitted into the outer core 12.
[0039]
As described above, in the present embodiment, the first and second engaging portions 28 and 30 for engaging the bobbins 18 a and 18 b adjacent to the bobbin 18 on the inner peripheral side of the stator 11 are provided. When the bobbin 18 is press-fitted into the outer core 12, the bobbin 18, 18a, 18b inside the outer core 12 is mounted by being engaged with the first and second engaging portions 28, 30 of the adjacent bobbin 18, respectively. It is possible to prevent displacement in a radially outward direction. As a result, even when the coil 20 is wound around the bobbin 18 in a concentrated manner, since the bobbins 18, 18a, and 18b are not displaced outward in the radial direction, the space factor of the coil 20 on the bobbin 18 can be increased. it can. Further, since the bobbin 18 can be easily pressed into the outer core 12, the workability of assembling the bobbin 18 can be improved.
[0040]
The coil 20 wound around the bobbin 18 is wound around the bobbin 18a by winding the coil 20 wound around the coil winding portion 24 of the bobbin 18 around the cover member 32a, 32b made of an insulating material. Contact can be prevented. As a result, the coil 20 can be concentratedly wound around the coil winding portion 24 without considering the contact with the adjacent coil 20, so that the space factor of the coil 20 on the bobbin 18 can be further improved. .
[0041]
Further, it is possible to prevent the insulating material coated on the surface of the wire 34 from peeling off under the action of contact between the coils 20, thereby preventing the insulating performance of the coil 20 from being deteriorated.
[0042]
Next, a bobbin 100 according to a modification will be described.
[0043]
As shown in FIG. 6, first and second engagement portions 102 and 104 that engage with adjacent bobbins 100 a and 100 b are formed at both ends of the peripheral wall 26 of the bobbin 100, and the stator 11 (see FIG. 6). 1) is formed on the inner peripheral side of the inner bobbin 100a, 100b.
[0044]
The first engaging portion 102 has a first engaging claw 108 protruding toward the outer peripheral side, and the second engaging portion 104 has a second engaging claw 110 protruding toward the inner peripheral side. Is formed.
[0045]
Then, the first engagement claw 108 is engaged with the second engagement claw 110 of the adjacent bobbin 100, and the second engagement claw 110 formed on the opposite side of the first engagement claw 108 is moved to the opposite side. The first engaging claw 108 of the adjacent bobbin 100a is engaged.
[0046]
The coil winding portion 24 around which the coil 20 is wound is formed so as to be in the same space when connected to the adjacent bobbins 100a and 100b. That is, the bobbin 100 alone is formed so that the coil winding portion 24 faces the outside.
[0047]
With such a structure, the outer core 12 is provided with the first and second engagement portions 102 and 104 that engage with the adjacent bobbins 100 a and 100 b on the outer peripheral side of the stator 11 (see FIG. 1) of the bobbin 100. When press-fitting the bobbin 100 into the inside of the outer core 12 (see FIG. 1), the bobbin 100 is mounted so as to be engaged with the first and second engaging portions 102 and 104 of the adjacent bobbins 100a and 100b, respectively. It is possible to prevent the inside of the bobbins 100, 100a, 100b from shifting in the radially outward direction. At this time, the joint 106 of the bobbin 100 and the joint 106 of the adjacent bobbins 100a and 100b abut on their joint surfaces.
[0048]
As a result, even when the coil 20 is wound around the bobbin 100 in a concentrated manner, the bobbin 100 is not displaced in a radially outward direction, so that the space factor of the coil 20 in the bobbin 100 can be increased. Further, since the bobbin 100 can be easily pressed into the outer core 12, the workability of assembling the bobbin 100 can be improved.
[0049]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0050]
That is, an engaging portion is formed in a tubular portion so as to face an adjacent bobbin, and the engaging portion between the bobbin and another adjacent bobbin is engaged with each other, so that the coil is formed in the tubular portion. On the other hand, even when concentrated winding is performed, bobbins are not displaced in the radially outward direction by the wound coil, so that workability of assembling the bobbin to the outer core can be improved.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional plan view of a rotating electric machine according to an embodiment of the present invention.
FIG. 2 is a perspective view of a single bobbin of the rotary electric machine.
FIG. 3 is a longitudinal sectional view of a single bobbin of the rotary electric machine.
FIG. 4 is a longitudinal sectional view of the bobbin in a state where a coil of the rotating electric machine is assembled.
FIG. 5 is a partially omitted longitudinal sectional view showing a state in which a coil winding portion of a bobbin of the rotary electric machine is surrounded by a cover member.
FIG. 6 is a partially omitted longitudinal sectional view of a bobbin according to a modification.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Rotating electric machine 12 ... Outer core 14 ... Tooth part 16 ... Inner core 18, 18a, 18b, 100, 100a, 100b ... Bobbin 20 ... Coil 24 ... Coil winding part 26 ... Peripheral wall 28, 102 ... First engagement part 30, 104 ... second engaging portions 32a, 32b ... cover members 36a, 36b ... engaging grooves 40 ... connecting portions 44, 108 ... first engaging claws 46, 110 ... second engaging claws 48 ... thin portions 106 ... Joint

Claims (2)

In a rotating electric machine including a stator and a rotor,
A coil is wound around a plurality of magnetic pole bodies provided on the inner core via a bobbin made of an insulating material, and the inner core on which the bobbin is mounted is fitted to an annular outer core,
The bobbin has a cylindrical portion into which the coil is wound outside and the magnetic pole body is inserted inside,
An engaging portion formed on the cylindrical portion so as to face an adjacent bobbin, and engaging the bobbin and another bobbin adjacent to each other;
With
A rotating electric machine wherein a displacement of the bobbin in a radial direction is restricted under an engagement action between the engagement portion and an engagement portion of an adjacent bobbin. The rotating electric machine according to claim 1,
The bobbin is connected to the tubular portion, and a cover member extending in a direction away from the tubular portion,
An engagement groove formed at a position facing the cover member with the tubular portion interposed therebetween, and an end portion of the cover member being engaged;
With
After the coil is wound around the tubular portion, the cover member is bent toward the tubular portion with a connection point with the tubular portion as a fulcrum, and the end of the cover member is engaged with the engagement groove. A rotating electric machine characterized by engaging with a rotating electric machine.

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