JP5281803B2 - Stator for motor - Google Patents

Abstract

A stator for a motor is provided to prevent a bobbin from being damaged or deformed when winding a conductor. A stator for a motor includes an exciter winding part, a post, a bobbin(23), and a winding conductor. The exciter winding part is made of an electrically conductive material. The bobbin is installed at the post. The conductor is wound around the bobbin. The bobbin includes a cylindrical part(23a), a first flange part(23b), and a second flange part(23c). The cylindrical part is installed at the post. The first flange part is installed at one end of the cylindrical part to contact a yoke. The second flange part is installed at the other end of the cylindrical part to contact a magnetic surface forming part.

Description

  The present invention relates to a stator for a motor.

Japanese Patent No. 3811179 (Patent Document 1) shows a stator for a motor including an annular yoke, a stator core having a magnetic pole structure fitted inside the annular yoke, and a plurality of exciting winding portions. Has been. The magnetic pole structure includes a plurality of pole columns connected to a yoke and mounted with an excitation winding portion, a plurality of magnetic pole surface forming portions having a magnetic pole surface on the inner peripheral side, and two adjacent magnetic pole surface forming portions. And a plurality of connecting portions to be connected. A plurality of recesses for fitting are formed in the inner peripheral portion of the yoke so as to open toward the magnetic pole component and to which one ends of the plurality of pole columns are respectively fitted. A pair of flat portions that are continuous with the inner surfaces of the fitting recesses are formed on both sides of the plurality of fitting recesses in the circumferential direction on the inner peripheral portion of the yoke. The exciting winding part is composed of a bobbin formed of an insulating material and fitted to the pole column, and a winding conductor wound around the bobbin. The bobbin includes a cylindrical portion that is fitted to the pole and wound with the winding conductor, and a pair of flat portions that are provided at one end of the cylindrical portion and contact the pair of flat portions of the yoke. The first flange portion and the second flange portion provided at the other end portion of the cylindrical portion and in contact with the magnetic pole surface forming portion are integrally provided.
Japanese Patent No. 3811179

  In this type of stator core, the space of the winding conductor wound around the cylindrical portion of the bobbin is increased (the proportion of the space in the slot occupied by the winding conductor, that is, the space factor is increased). It is required to reduce the thickness of the film. However, if the thickness of the flange portion of the bobbin is reduced, the bobbin may be deformed or damaged due to stress during winding of the winding conductor. As a result, there arise problems that the electrical insulation effect of the bobbin is lowered, and that the bobbin around which the winding conductor is wound cannot be fitted to the pole column. Therefore, the conventional bobbin structure has a limit in reducing the thickness of the bobbin collar.

  An object of the present invention is to provide a motor stator that can maintain a large space factor of a winding conductor and that can prevent deformation and breakage of a bobbin when the winding conductor is wound.

  Another object of the present invention is to provide a motor stator capable of preventing a bobbin from becoming an obstacle to fitting when a magnetic pole structure is fitted to a yoke.

  A motor stator to be improved by the present invention includes a stator core having an annular yoke and a magnetic pole structure fitted inside the annular yoke, and a plurality of excitation winding portions provided on the magnetic pole structure. It has. The magnetic pole structure is disposed inside the annular yoke at intervals in the circumferential direction of the yoke, and has one end connected to the yoke and the other end positioned radially inward of the one end. A plurality of pole columns on which the wire portions are mounted, a plurality of magnetic pole surface forming portions each provided at the other end and having a magnetic pole surface on the inner peripheral side, and a plurality of couplings respectively connecting two adjacent magnetic pole surface forming portions Part. The yoke and the magnetic pole component are each formed by laminating a plurality of magnetic steel plates. A plurality of fittings that are open in both directions in the stacking direction of a plurality of magnetic steel sheets and open toward the magnetic pole component on the inner peripheral portion of the yoke, and are respectively fitted with one end of the plurality of pole columns A recess is formed. A pair of flat portions that are continuous with the inner surfaces of the fitting recesses are formed on both sides of the plurality of fitting recesses in the circumferential direction on the inner peripheral portion of the yoke. The exciting winding part is composed of a bobbin formed of an insulating material and fitted to the pole column, and a winding conductor wound around the bobbin. The bobbin has a cylindrical portion that is fitted to the pole column and on which the winding conductor is wound, and a pair of flat portions that are provided at one end of the cylindrical portion and come into contact with the pair of flat portions of the yoke. A first collar and a second collar provided at the other end of the cylindrical portion and in contact with the magnetic pole surface forming portion are integrally provided. In the present invention, the first flange portion includes a first connection portion that connects one end of each of the pair of flat portions and a second connection portion that connects each other end of the pair of flat portions. The first connecting portion has a protrusion that passes through the fitting recess and protrudes outside the fitting recess when one end of the pole poles of the magnetic pole component is fitted into the fitting recess. The part is provided integrally. The protrusion protrudes from an opening that opens in one direction of the stacking direction of the fitting recess.

  According to the present invention, when the protruding portion is provided integrally with the first connecting portion, the thickness of the first connecting portion of the first flange portion is increased by the protruding portion, so that the mechanical strength of the first flange portion is increased. Can be increased. Therefore, deformation and breakage of the bobbin when winding the winding conductor can be prevented while maintaining a large space factor of the winding conductor.

  The cross-sectional shape when the protrusion provided on the first flange is cut in the orthogonal direction parallel to the magnetic steel plate and orthogonal to the stacking direction is similar to the cross-sectional shape when the fitting recess is cut in the orthogonal direction. Is preferred. If it does in this way, the thickness of the 1st connection part by a protrusion part can be increased as much as possible.

  If the cross-sectional shape of the projecting portion has a similar shape so that the inner surface of the fitting recess and the outer surface of the projecting portion come into contact when one end of the pole column is fitted into the fitting recess, the projecting portion The thickness of the first connecting portion can be increased to the maximum.

  It is preferable that the second connecting portion of the first flange portion is integrally formed with a stopper portion that comes into contact with the yoke when one end of the pole column is completely fitted in the fitting recess. In this way, when one end of the plurality of pole columns of the magnetic pole constituting body is fitted into the plurality of fitting recesses, the stopper portion comes into contact with the yoke. Thereby, the position of the magnetic pole component can be easily confirmed by confirming the position of the stopper portion with respect to the yoke. Moreover, a stopper part will increase the thickness of a 2nd connection part, and can raise the mechanical strength of a 2nd connection part.

  Further, a pair of ribs may be integrally formed on the pair of flat portions of the bobbin along the through holes into which the pole columns are fitted. In this case, the inner surface of the recess for fitting is constituted by a pair of inclined plane portions that are respectively continuous with the pair of plane portions. And between the pair of inclined plane portions and the one end of the pole column fitted in the fitting recess, a pair of spaces in which the pair of ribs of the bobbin are respectively fitted is formed. Define the dimensions. If it does in this way, the mechanical strength of a 1st collar part can further be raised by partially increasing the thickness of a pair of flat part of a bobbin with a pair of rib.

  In addition, it is preferable that the shape of the tip region of the first connecting portion is a shape in which the dimension in the width direction in which the pair of flat portions are arranged gradually increases as the pair approaches the pair of flat portions. With such a shape, when the magnetic pole component is fitted to the yoke, the corners on both sides of the tip region of the first connecting portion of the bobbin are prevented from colliding with the yoke, thereby preventing the fitting from being obstructed. Can do. Specifically, taper surfaces (inclined surfaces) may be formed at both corners in the width direction of the tip region of the first connecting portion. In this case, the dimension between the two tapered surfaces is formed so as to increase as it approaches the pair of flat portions. Further, both corners may be rounded (both corners are curved in a convex shape).

  According to the present invention, since the protruding portion is provided integrally with the first connecting portion of the bobbin collar, the thickness of the first connecting portion can be increased by the protruding portion, and the first hook mechanical Strength can be increased. Therefore, deformation and breakage of the bobbin when winding the winding conductor can be prevented while maintaining a large space factor of the winding conductor.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a motor stator according to a first embodiment of the present invention. As shown in the figure, the motor stator 1 of this example includes a stator core 3 and six exciting winding portions 5. As shown in FIG. 2, the stator core 3 includes an annular yoke 7 and a magnetic pole structure 9 disposed inside the annular yoke 7. In FIG. 2, for reference, only one excitation winding portion 5 is provided. The yoke 7 is configured by laminating a plurality of yoke magnetic steel plates 11. The shape of the outer periphery of the yoke 7 cut in a direction orthogonal to the stacking direction of the plurality of yoke magnetic steel plates 11 has a circular shape. Further, the cut shape of the inner peripheral portion of the yoke 7 is a combination of a regular hexagonal shape and six fitting recesses 7a formed at substantially the center of each side of the regular hexagonal shape. ing. Each fitting recess 7a opens in both directions in the stacking direction of the plurality of magnetic steel plates and opens toward the magnetic pole component 9 (inward in the radial direction of the yoke 7). It is formed on the inner periphery. In addition, a pair of flat portions 7b that are continuous with the inner surface of the fitting recess 7a are formed on the inner peripheral portion of the yoke 7 on both sides in the circumferential direction of the six fitting recesses 7a. The pair of plane portions 7b have the same length in the circumferential direction and are located in the same virtual plane. Further, the inner surface of the fitting recess 7a is constituted by a pair of inclined flat portions 7c that are respectively continuous with the pair of flat portions 7b.

  The magnetic pole structure 9 includes six pole columns 13, a magnetic pole surface forming portion 15 provided at the end of the pole column 13, and six connecting portions 17 that respectively connect two adjacent magnetic pole surface forming portions 15. And have. The pole column 13 is disposed on the inner side of the yoke 7 with a gap in the circumferential direction, and has one end connected to the yoke 7 and the other end positioned radially inward of the one end. In this example, one end of the pole column 13 is constituted by a triangular convex portion 13a. For this reason, the convex portion 13 a has a pair of inclined surfaces 13 b extending in the circumferential direction of the yoke 7. The convex portion 13a is fitted into the fitting concave portion 7a of the yoke 7 so that the pair of inclined surfaces 13b and the pair of inclined flat surface portions 7c of the yoke 7 are in contact with each other, and the pole column 13 is connected to the yoke 7. Has been. In this example, the length dimension of the inclined surface 13b in the circumferential direction of the yoke 7 is shorter than the length dimension of the inclined plane portion 7c in the circumferential direction. Therefore, a part of the pair of inclined plane parts 7c is exposed to the pole column 13 side, and a groove-like cross section extends in the stacking direction of the triangle between a part of the pair of inclined plane parts 7c and the pole column 13. A pair of spaces 19 are formed. The magnetic pole surface forming portion 15 has a magnetic pole surface 15a provided at the other end of the pole column 13 and facing the rotor on the inner peripheral side. Note that a rotor (not shown) is disposed in a region surrounded by the magnetic pole surface 15a.

  As with the yoke 7, the magnetic pole structure 9 is configured by laminating a plurality of magnetic steel plates 21 for magnetic poles. As shown in FIG. 3, one yoke magnetic steel plate 11 constituting the yoke 7 and one magnetic pole magnetic steel plate 21 constituting the magnetic pole component 9 are punched by pressing one steel plate material M as shown in FIG. It is formed by. The magnetic steel plate 11 for a yoke has a flat portion constituting portion 11 a constituting the flat portion 7 b of the yoke 7 and an inclined flat surface forming portion 11 b of the yoke 7 constituting the inclined flat portion 7 c of the yoke 7.

  The magnetic steel plate for magnetic pole 21 has a pole column constituting portion 21 a constituting the pole column 13, a magnetic pole face constituting portion 21 b constituting the magnetic pole face forming portion 15, and a connecting constituting portion 21 c constituting the connecting portion 17. Yes. The pole column constituting portion 21a has an inclined surface constituting portion 21d constituting the inclined surface 13b. Then, a part of the two adjacent flat surface portion constituting portions 11a of the yoke magnetic steel plate 11 and the two adjacent inclined surface constituting portions 21d of the magnetic pole magnetic steel plate 21 are cut by the press. In the subsequent step, the pole column 13 and the yoke 7 are connected so that the inclined surface forming part 21d and the inclined plane forming part 11b come into contact with each other. The angle θ1 between the constituent portions 21d and the angle θ2 between the two adjacent inclined plane forming portions 11b can be appropriately set. For example, if the angle θ1 and the angle θ2 are substantially the same, or the angle θ1 is slightly larger than the angle θ2, the pole column 13 and the yoke 7 can be tightly fitted.

  As shown in FIGS. 2 and 4, the excitation winding portion 5 is composed of a bobbin 23 formed of an electrically insulating material and fitted to the pole 13, and a winding conductor 25 wound around the bobbin 23. Has been. As shown in FIG. 5, the bobbin 23 includes a cylindrical portion 23 a that is fitted to the pole column 13, and a first flange portion 23 b that is provided at one end of the cylindrical portion 23 a and contacts the yoke 7. And a second flange 23c that is provided at the other end of the cylindrical portion 23a and contacts the magnetic pole surface forming portion 15. The mutually opposing inner surfaces of the first flange portion 23b and the second flange portion 23c extend in parallel. The winding conductor 25 is aligned and wound around the cylindrical portion 23a.

  The first flange 23b includes a pair of flat portions 23d that contact the pair of flat portions 7b of the yoke 7, a first connection portion 23e that connects one end of each of the pair of flat portions 23d, and a pair of flat portions 23d. And a second connecting portion 23f for connecting the other end of each. The second connecting portion 23f is integrally formed with a stopper portion 23g that comes into contact with the yoke 7 when one end (the convex portion 13a) of the pole column 13 is completely fitted into the fitting concave portion 7a. . The stopper portion 23g is integrally formed on the entire second connection portion 23f. Therefore, due to the presence of the stopper portion 23g, the thickness of the second connecting portion 23f is increased substantially uniformly, and the mechanical strength is increased. In this example, the outer surfaces of both end portions (both end portions aligned along the circumferential direction of the yoke) 23m of the stopper portion 23g are rounded (that is, the outer surface is curved).

  The first connecting portion 23e is integrally provided with a protruding portion 23h that protrudes toward the yoke 7 side. The protrusion 23h has a cross-sectional shape when cut in an orthogonal direction parallel to the magnetic steel plate 21 and orthogonal to the stacking direction, and is similar to the cross-sectional shape when the fitting recess 7a is cut in the orthogonal direction. It has a triangular shape. For this reason, the protrusion 23h has an outer surface formed of two inclined surfaces 23p. The cross-sectional shape dimension of the projecting portion 23h is substantially the same as or slightly smaller than the cross-sectional shape of the fitting recess 7a. Thereby, the protrusion 23h passes through the fitting recess 7a when one end of each of the six pole columns 13 of the magnetic pole structure 9 is fitted into the six fitting recesses 7a. It will come out of the opening part opened to one direction of the lamination direction of 7a. As a result, the outer surface formed of the two inclined surfaces 23p is also exposed to the outside of the fitting recess 7a. In this example, the cross-sectional shape of the protrusion 23h is such that when one end of the pole column 13 is fitted into the fitting recess 7a, the inner surface of the fitting recess 7a and the outer surface (a pair of inclined surfaces 23p) of the protrusion 23h. Has a shape to contact. As described above, since a pair of groove-like spaces 19 extending in the stacking direction is formed between a part of the pair of inclined flat surface portions 7c and the pole column 13, the bottom portion (the first portion of the projecting portion 23h) The circumferential length L1 of the yoke 7) is longer than the length L2 between the pair of flat portions 23d.

  Further, in the stator core 3 of this example, as shown in FIG. 2, the distance between the apex of the corner of one end of the pole column 13 and the center point C of the stator core 3 is R, and the distance between one end and the other end of the pole column 13 is The width dimension in the direction orthogonal to the extending direction is T, the distance between the base of the triangular convex portion 13a of the pole 13 and the center point C is x, and one side of the regular hexagon on the inner periphery of the yoke 7 is When the distance between a point perpendicular to one side of the imaginary line passing through the center point C and the center point is H, N, T, and R are T ≦ 2R (1-cos (π / N) ) / Tan (π / N). H, x, and R have a relationship of H <x <R. Here, N is the number of exciting winding portions (6 in this example).

  In this example, the stator 1 was assembled as follows. First, the winding conductor 25 was wound around the bobbin 23 to make the exciting winding part 5. Next, as shown in FIG. 6, the excitation winding portion 5 was fitted to the pole column 13 of the magnetic pole structure 9. As a result, the second flange portion 23 c of the bobbin 23 comes into contact with the magnetic pole surface forming portion 15 of the magnetic pole structure 9. Next, as shown in FIGS. 7A and 7B, the convex portion 13a of the pole column 13 to which the exciting winding portion 5 is attached is fitted into the fitting concave portion 7a of the yoke 7, thereby exciting the winding portion. 5 is attached to the yoke 7. When assembling, the projecting portion 23h passes through the fitting recess 7a while the pair of inclined surfaces 23p are in contact with the inner surface of the fitting recess 7a, and comes out of the fitting recess 7a. At this time, the pair of portions 23 i (the flat portions continuing to the pair of flat portions 23 d) of the first connecting portion 23 e located on both sides of the protruding portion 23 h are a pair of flat portions formed on the inner peripheral surface of the yoke 7. It passes through the inside of the yoke 7 in contact with 7b and protrudes outside the yoke. In this state, most of the pair of flat portions 23 d of the bobbin 23 is in contact with the pair of flat surface portions 7 b constituting a part of the inner peripheral surface of the yoke 7. Further, the end surface 23 n of the stopper portion 23 g on the pole column 13 side is in contact with one side surface of the yoke 7. Thereby, positioning with respect to the yoke 7 of the magnetic pole structure 9 can be performed reliably.

  According to the motor stator of this example, since the protrusion 23h is integrally provided on the first connection portion 23e of the bobbin 23, the thickness of the first connection portion 23e of the first flange 23b is increased by the protrusion 23h. Thereby, the mechanical strength of the first flange 23b can be increased. Therefore, it is possible to prevent deformation and breakage of the bobbin when the winding conductor 25 is wound while maintaining a large space factor of the winding conductor 25.

  FIG. 8 is a perspective view of a bobbin 123 used in a motor stator according to another embodiment of the present invention. The bobbin 123 of this example has a pair of ribs 123j on a pair of flat portions 123d, respectively, and has the same structure as the bobbin 23 shown in FIG. For this reason, the same members as those of the bobbin 23 shown in FIG. 5 are given the same reference numerals as those shown in FIG. In this example, the pair of ribs 123j has a right-angled triangular cross-sectional shape, and one end of each of the six pole columns 13 of the magnetic pole structure 9 is fitted into each of the six fitting recesses 7a. Are fitted into a pair of groove-like spaces 19 (see FIG. 2) formed between a part of the pair of inclined flat portions 7c and the pole column 13.

  FIG. 9 is a perspective view of the protrusion 223h of the bobbin 223 used in the motor stator according to still another embodiment of the present invention. The same members as those of the bobbin 23 shown in FIG. 5 are denoted by the numbers obtained by adding 200 to the numbers of the numbers given in FIG. The cross-sectional shape of the protrusion 223h has a triangular shape that is similar to the cross-sectional shape when the fitting recess 7a is cut in the orthogonal direction. However, the circumferential length L3 of the yoke 7 at the bottom of the protrusion 223h of this example (the portion integrated with the first connecting portion 23e) is equal to the length L4 between the pair of flat portions 23d. Yes. For this reason, the protrusion part 223h of this example has a cross-sectional area smaller than the protrusion part 23h shown in FIG.

  FIG. 10 is a perspective view of the protruding portion 323h of the bobbin 323 used in the motor stator according to still another embodiment of the present invention. The same members as those of the bobbin 23 illustrated in FIG. 5 are denoted by the numbers obtained by adding 300 to the numbers of the numbers denoted in FIG. The protrusion 323h has a rectangular parallelepiped shape. Therefore, the cross-sectional shape of the protruding portion 323h has a rectangular shape having a smaller cross-sectional area than the cross-sectional shape when the fitting recess 7a is cut in the aforementioned orthogonal direction.

  FIG. 11 is a perspective view of an excitation winding portion 405 used in a motor stator according to still another embodiment of the present invention. The same members as those of the bobbin 23 shown in FIG. 5 are denoted by the numbers obtained by adding 400 to the numbers of the numbers given in FIG. The bobbin 423 of the excitation winding portion 405 has tapered surfaces at both corners (corner portions of the pair of portions 423i) in the width direction (the direction in which the pair of flat portions 423d are arranged) of the first connection portion 423e. 423j is formed. The dimension between the two tapered surfaces 423j is formed so as to increase as it approaches the pair of flat portions 423d. As a result, the shape of the tip region including the protruding portion 423h and the pair of portions 423i of the first connecting portion 423e gradually increases in the widthwise dimension in which the pair of flat portions 423d are aligned as the pair approaches the pair of flat portions 423d from the tip. It has a larger shape. With such a shape, when the magnetic pole component is fitted to the yoke, the corners on both sides of the distal end region of the first connecting portion 423e of the bobbin 423 come into contact with the yoke, resulting in a hindrance to the fitting. Can be prevented. In this example, the two tapered surfaces 423j are linearly inclined surfaces, but the corners of the pair of portions 423i may be rounded (both corners are curved in a convex shape).

It is a front view of the stator for motors of the 1st Embodiment of this invention. It is a front view of the stator core used for the stator shown in FIG. It is a figure for demonstrating the aspect which stamps from the steel plate material the magnetic steel plate for yokes and the magnetic steel plate for magnetic poles used for the stator shown in FIG. It is a perspective view of the exciting winding part used for the stator shown in FIG. It is a perspective view of the bobbin used for the stator shown in FIG. It is a figure for demonstrating the aspect which assembles the stator shown in FIG. (A) And (B) is a figure for demonstrating the aspect which assembles the stator shown in FIG. It is a perspective view of the bobbin used for the stator for motors of other embodiments of the present invention. It is a perspective view of the protrusion part of the bobbin used for the stator for motors of further another embodiment of this invention. It is a perspective view of the protrusion part of the bobbin used for the stator for motors of further another embodiment of this invention. It is a perspective view of the excitation winding part used for the stator for motors of another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor stator 3 Stator core 5 Excitation winding part 7 Yoke 9 Magnetic pole structure 7a Fitting recessed part 7b A pair of plane part 7c A pair of inclined plane part 13 A pole pillar 15 A magnetic pole surface formation part 17 A connection part 19 A pair of space 23 Bobbin 23a Cylindrical part 23b 1st collar part 23c 2nd collar part 23d Flat part 23e 1st connection part 23f 2nd connection part 23g Stopper part 23h Protrusion part 25 Winding conductor

Claims (5)

A stator core having an annular yoke and a magnetic pole structure fitted inside the annular yoke;
A plurality of exciting winding portions provided in the magnetic pole structure,
The magnetic pole structure is disposed on the inner side of the annular yoke at intervals in the circumferential direction of the yoke, and has one end connected to the yoke and the other end positioned radially inward of the one end. A plurality of pole columns to which the exciting winding portion is mounted, a plurality of magnetic pole surface forming portions each provided at the other end and having a magnetic pole surface on the inner peripheral side, and two adjacent magnetic pole surface forming portions A plurality of connecting portions that respectively connect the
The yoke and the magnetic pole component are each configured by laminating a plurality of magnetic steel plates,
The one end of each of the plurality of pole columns is fitted to the inner peripheral portion of the yoke so as to open toward both directions in the stacking direction of the plurality of magnetic steel plates and toward the magnetic pole component. A plurality of recesses for fitting are formed,
A pair of plane portions that are continuous with the inner surfaces of the fitting recesses are formed on both sides in the circumferential direction of the plurality of fitting recesses, respectively, on the inner peripheral portion of the yoke,
The exciting winding part is composed of a bobbin formed of an insulating material and fitted to the pole column, and a winding conductor wound around the bobbin,
The bobbin is fitted to the pole column and is wound around the winding conductor, and is provided at one end of the cylindrical portion and contacts the pair of flat portions of the yoke. A motor stator integrally including a first flange portion having a pair of flat portions and a second flange portion provided at the other end portion of the cylindrical portion and in contact with the magnetic pole surface forming portion. There,
The first flange includes a first connecting portion that connects one end of each of the pair of flat portions and a second connecting portion that connects each other end of the pair of flat portions, The first connecting portion includes a fitting recess that passes through the fitting recess when the one ends of the pole poles of the magnetic pole structure are fitted into the fitting recesses. Protruding part that goes out is provided integrally,
The cross-sectional shape when the protruding portion is cut in the orthogonal direction parallel to the magnetic steel plate and orthogonal to the stacking direction is similar to the cross-sectional shape when the fitting recess is cut in the orthogonal direction,
The cross-sectional shape of the protrusion has a shape in which the inner surface of the fitting recess and the outer surface of the protrusion contact when the one end of the pole column is fitted into the fitting recess. A stator for a motor. The second connecting portion of the first flange portion is integrally formed with a stopper portion that comes into contact with the yoke when the one end of the pole pole is completely fitted into the fitting recess. The stator for a motor according to claim 1 . The pair of flat portions of the bobbin are integrally formed with a pair of ribs extending along a through hole into which the pole column is fitted,
The inner surface of the recess for fitting is constituted by a pair of inclined plane portions that are respectively continuous with the pair of plane portions,
A pair of spaces into which the pair of ribs of the bobbin are respectively fitted are formed between the pair of inclined flat portions and the one end of the pole column fitted into the fitting recess. the pair of inclined plane portions motor stator according to claim 1 or 2 dimensions is defined for. The distal end section of the first connecting portion of claim 1, 2 or 3 wherein the pair of width direction dimension flat portions are arranged has a gradually larger shape as they approach to the pair of flat portions from the tip The stator for motors described in 1. Tapered surfaces are respectively formed at both corners in the width direction of the tip region of the first connecting portion, and the dimension between the two tapered surfaces increases as the pair of flat portions approaches. The stator for motors according to claim 4 formed in the above.

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