JP3285532B2 - Stator core for rotating magnetic field type motor and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating magnetic field type electric motor, and more particularly, to an improvement in a winding structure around a fixed iron core to increase the winding amount.

[0002]

2. Description of the Related Art Conventionally, when winding is performed on a stator of a rotating field motor, it is necessary to perform winding from the inside of the stator core.
Therefore, the teeth part and outer peripheral part of the stator core are divided,
A structure in which a winding is wound directly from the outside of a stator iron has been proposed. (See JP-A-2-7839 and JP-A-1-248948)

As shown in FIG. 8, a stator core disclosed in Japanese Patent Application Laid-Open No. 2-7839 has an axial press-fit groove 1 at an equal angular interval on an inner surface of a yoke portion (outer peripheral portion of a fixed core) 1.
, 1a, a ring 2 is provided concentrically in the yoke portion 1, and magnetic pole pieces 3,. , 3 are externally wound, and the tips of the magnetic pole pieces 3,..., 3 are press-fitted into the press-fitting grooves 1a of the yoke 1.

As shown in FIG. 9, a stator core disclosed in Japanese Patent Application Laid-Open No. 1-248948 described below has a yoke 1 divided in the same manner as in FIG.
Is provided, a coil frame 4 made of an insulating member is provided, and a coil 5 is wound on a coil portion 4a protruding at a required interval on the coil frame 4, and then the coil frame 4 is removed from the coil frame 4. The outer circumference of the pole pieces 3,...

[0005]

However, in any of the above-mentioned and later-described stators, the adjacent pole piece 3
Alternatively, for the adjacent winding portion 4a of the coil frame 4, 1
Each time the winding is performed, the operation of moving to the adjacent magnetic pole piece 3 or the winding portion 4a and winding the winding once again is repeated, and the winding is substantially uniformly wound on all the winding portions 4a. Since the winding is wound by so-called distributed winding, which is wound, the previously wound winding hinders the increase of the winding amount. Therefore, there is a problem that the space factor of the winding, which is the ratio of the winding occupying in the slot of the stator core, does not improve so much, and miniaturization and high output of the motor are hindered. Further, the problem that the winding work is difficult because the windings interfere with each other when the windings are wound on adjacent winding portions has not been solved.

Accordingly, an object of the present invention is to improve the winding structure of a fixed iron core to improve the space factor of the winding and facilitate the winding operation.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a cylindrical outer peripheral member, a plurality of tooth members arranged on an inner peripheral side of the outer peripheral member, and a tooth member respectively. A plurality of insulating bobbins attached to the, and a stator core of a rotating magnetic field type motor having a plurality of windings respectively wound on the insulating bobbin, the axial press-fit grooves at equal angular intervals on the inner peripheral surface A plurality of cylindrical outer peripheral members, a base portion press-fitted into each press-fitting groove of the outer peripheral member, a body portion continuous with the base portion, and an arc-shaped head continuous with the body portion, respectively. A plurality of teeth members, the heads of which are connected to each other by connecting pieces, and a plurality of teeth members integrated in an annular shape; A central portion having a central portion is provided on both sides of the central portion. An arcuate inner winding housing frame and an outer winding housing frame that are curved so that the base side of the teeth member becomes convex are spaced apart from each other, and the outer end of the outer winding housing frame is formed on the inner circumference. A plurality of insulating bobbins of the same shape, each provided so as to protrude in the circumferential direction from the outer peripheral end of the side winding accommodating frame, and arc-shaped winding slots formed on both sides of the central portion, Winding the winding slot up to a line connecting the outer peripheral end of the outer peripheral winding housing frame and the outer peripheral end of the inner peripheral winding housing frame,
A winding having a fan-shaped winding in which the number of windings is larger on the outer side of the winding slot than on the inner side, and the outer ends of the outer side housing frames of adjacent insulating bobbins abut each other, and The outer peripheral ends of the inner peripheral side housing frame of the bobbin are in contact with each other,
An object of the present invention is to provide a stator core of a rotating magnetic field type electric motor.

According to the stator core of the rotating magnetic field type motor according to the first aspect of the present invention, instead of winding the winding directly on the stator core, the winding is wound around each of the insulating bobbins, and then the insulation is wound. Since the bobbin is externally fitted to the teeth member, adjacent windings do not interfere at the time of winding. Therefore, even if it winds to almost the whole of the winding slot of each insulating bobbin, that is, to the line connecting the outer peripheral end of the outer peripheral side winding accommodating frame and the outer peripheral end of the inner peripheral side winding accommodating frame, the through hole of each insulating bobbin does not And the head of the tooth member can be press-fitted into the press-fitting groove of the outer peripheral member and assembled, and the space factor of the winding can be improved,
The size and output can be reduced. In addition, as described above, the outer peripheral end of the outer winding housing frame is provided so as to protrude in the circumferential direction from the outer peripheral end of the inner winding housing frame, and the winding wound around each winding slot is provided. Has a fan shape in which the number of windings is larger on the outer peripheral side than on the inner peripheral side, so that the circumferential gap is reduced and the space factor of the windings can be further improved. Furthermore, according to the fixed iron core of the rotating magnetic field type electric motor according to the first aspect of the present invention, the winding is not wound directly on the stator core, but is wound on each insulating bobbin. Since the insulating bobbin is externally fitted to the teeth member, adjacent windings do not interfere with each other when the windings are wound, thereby facilitating the winding operation.

Furthermore, since the outer peripheral ends of the outer peripheral housing frames of adjacent insulating bobbins abut each other, and the outer peripheral ends of the inner peripheral housing frames of adjacent insulating bobbins abut each other, adjacent windings are formed. The circumferential gap therebetween is reduced to a minimum, and the space factor of the winding is further improved.

[0010] In the insulating bobbin, the inner peripheral winding housing frame may be in close contact with the head of the tooth member, and the outer peripheral winding housing frame may be in close contact with the inner peripheral surface of the outer peripheral member. preferable. With such a configuration, there is no radial gap between the outer peripheral member, the teeth member, and the outer peripheral member of the insulating bobbin, so that the radial dimension of the entire stator core can be set small, and as a result, the winding space The rate is further improved.

It is preferable that the press-fit groove formed on the inner peripheral surface of the outer peripheral member has a wide outer peripheral shape, and that the base of the tooth member has the same outer peripheral wide shape as the press-fit groove.
In such a configuration, the base of the tooth member pressed into the press-fitting groove of the outer peripheral member is securely held in the press-fitting groove.
In particular, it is possible to reliably prevent the teeth member from being displaced in the radial direction of the outer peripheral member with respect to the outer peripheral member.

According to a second aspect of the present invention, there is provided a cylindrical outer peripheral member in which axial press-fit grooves are formed at equal angular intervals on an inner peripheral surface, a base press-fitted into each press-fit groove of the outer peripheral member, and A central portion having a continuous trunk portion, a teeth member integrally provided with an arc-shaped head continuous with the trunk portion, and a through-hole that fits through the base of each of the tooth members and fits over the trunk portion Are provided on both sides of the central portion with a space between the arc-shaped inner-side winding housing frame and the outer-side winding housing frame that are curved so that the base side of the tooth member is convex, and A plurality of wires of the same shape are provided so that the outer peripheral end of the wire housing frame projects in the circumferential direction from the outer peripheral end of the inner circumferential winding housing frame, and arc-shaped winding slots are formed on both sides of the central portion. A rotating magnetic field including an insulating bobbin and a winding wound around a winding slot of each of the insulating bobbins. A method for manufacturing a stator core of an electric motor, comprising: winding a winding slot on each of the insulating bobbins up to a line connecting an outer peripheral end of the outer peripheral winding housing frame and an outer peripheral end of the inner peripheral winding housing frame. Winding, fitting the body of the teeth member into the through hole of each insulating bobbin around which the winding is wound, and projecting the base of the teeth member to the outer peripheral side of the insulating bobbin,
After the head of the teeth member is brought into close contact with the inner winding housing frame, the base of the teeth member is axially pressed into the press-in groove of the outer member, and the teeth member is integrally assembled with the outer member.
The outer peripheral winding housing frame of the insulating bobbin is brought into close contact with the inner peripheral surface of the outer peripheral member, the outer peripheral ends of the outer peripheral housing frames of the adjacent insulating bobbins are brought into contact with each other, and the inner peripheral housing of the adjacent insulating bobbin is accommodated. An object of the present invention is to provide a method for manufacturing a stator core of a rotating magnetic field type armature, wherein outer peripheral ends of a frame are brought into contact with each other.

In the method for manufacturing the stator core of the rotating magnetic field type armature according to the second invention, the winding is not wound directly on the fixed core but is wound on each of the insulating bobbins, and then the insulation is wound. Since the bobbin is externally fitted to the teeth member, adjacent windings do not interfere with each other when winding the windings. Therefore, even if it winds to almost the whole of the winding slot of each insulating bobbin, that is, to the line connecting the outer peripheral end of the outer peripheral side winding accommodating frame and the outer peripheral end of the inner peripheral side winding accommodating frame, the through hole of each insulating bobbin does not And the head of the tooth member can be press-fitted into the press-fitting groove of the outer peripheral member. Therefore, according to the manufacturing method of the second aspect of the invention, it is possible to improve the space factor of the winding and manufacture a small-sized and high-output stator core. Further, as described above, the outer peripheral side of the outer peripheral side winding accommodating frame is provided so as to protrude in the circumferential direction from the outer peripheral end of the inner peripheral side winding accommodating frame. Also, since the winding is wound in a fan shape having a large number of windings, the circumferential gap is reduced, and the space factor of the winding can be further improved. Furthermore, according to the method of manufacturing the fixed iron core of the rotating magnetic field type motor according to the second invention, the winding is not wound directly on the stator core, but is wound on each insulating bobbin. Since the bobbin is externally fitted to the teeth member, adjacent windings do not interfere with each other when the windings are wound, thereby facilitating the winding operation. Furthermore,
Circumferential gaps between adjacent windings in order to make the outer ends of the outer housing frames of adjacent insulating bobbins abut each other and the outer ends of the inner housing frames of adjacent insulating bobbins to each other Is minimized, and the space factor of the winding is further improved.

Specifically, the step of winding the winding around the winding slot of the insulating bobbin is performed by, for each insulating bobbin, the outer peripheral end of the outer peripheral winding housing frame and the inner peripheral winding housing frame. This is a concentrated winding in which the winding is continuously wound up to a line connecting the outer peripheral ends.

It is preferable that the plurality of teeth members have their heads connected by a continuous piece to be integrated in an annular shape. In the case where the tooth members are configured as described above, a jig for holding each tooth member at a predetermined position is unnecessary when assembling the insulating bobbin around which the winding is wound to the tooth member, so that the manufacturing process is simplified. You.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. In FIG. 1, reference numeral 10 denotes a stator core outer peripheral member, 11 denotes a piece-shaped stator iron teeth member, 13 denotes an insulating bobbin, and 14 denotes a winding.

The stator core outer peripheral member 10 has a shape shown in FIG.
) To form the press-fit grooves 10a, ..., 10 in the axial direction. Each of the press fitting grooves 10a has a trapezoidal key cross section.

As shown in FIG. 2, the teeth member 11 is formed in a substantially T-shape, and has a trapezoidal key-shaped base portion 11a on the outer peripheral side which is pressed into the press-fitting groove 10a of the outer peripheral member 10 in the axial direction. A square torso 11b continuous to the base 11a and an arc-shaped head 1 to the torso 11b
1c.

The shape of the press-fitting groove 10a and the base 11a is not limited to the trapezoidal key shape, and any shape may be used as long as both have the same shape and the base 11a can be press-fitted into the press-fitting groove 10a in the axial direction. However, the press-fit groove 10 and the base 11a are formed on the bottom side (base 11a) of the press-fit groove 10 like the trapezoidal key.
It is preferable that the outer peripheral shape be wider toward the front end side. When the press-fit groove 10a and the base 11a have such shapes, the base 11a press-fitted into the press-fit groove 10a is
It is securely held in the press-fit groove 10a. In particular, it is possible to reliably prevent the teeth member 11 from being displaced in the radial direction of the outer peripheral member 10 with respect to the outer peripheral member 10.

As shown in FIG. 4, the tooth member 11 has a disk-shaped holding jig 12 with which a protruding fitting portion 12a is formed on the head 11c of the tooth member 11 at the time of assembly. Fitted in the mating recess 11d, holding the teeth member 11 in a predetermined position, and in this state, assembling each of the wound insulating bobbins 13 as described later,
The base 11a of the tooth member 11 can be press-fitted into the press-fit groove 11a of the outer peripheral member 11 in the assembled state.

As shown in FIG. 5, the heads 11c 'of adjacent teeth members 11' may be connected by connecting pieces 11d 'to integrate a plurality of teeth members 11' in an annular shape. In this case, the holding jig 12 becomes unnecessary, and the manufacturing process is simplified.

As shown in FIGS. 6 and 7, the insulating bobbin 13 has a through hole 1 in which a body portion 11b of the teeth member 11 can be fitted from the inner peripheral side into an arc-shaped frame-shaped central portion 13a.
3b is provided. The central portion 13a has an arcuate inner winding housing frame 13c and an outer winding housing that protrude from the inner and outer circumferential sides on both sides in the circumferential direction and are curved so that the base 11a side of the teeth member 11 is convex. 13d is provided, and winding slots 13e, 13e, which penetrate in the vertical direction and are open at the outer end face in the circumferential direction, are provided on both circumferential sides of the central portion 13a. The outer peripheral ends of the inner peripheral side winding accommodating frame 13c and the outer peripheral side winding accommodating frame 13d are set so as to be located on the same radius from a virtual center point (stator core center point). The winding housing frame 13d on the side protrudes in the circumferential direction from the winding housing frame 13c on the inner peripheral side.

As shown in FIG. 1, each insulating bobbin 13 is fitted to the tooth member 11 and the base 11 of the tooth member 11 is
a in the press-fit groove 10 a of the outer peripheral member 10,
The outer peripheral ends of the outer peripheral winding housing frames 13d of the adjacent insulating bobbins 13 are in contact with each other, and the outer peripheral ends of the inner peripheral winding housing frames 13c of the adjacent insulating hobbins 13 are in contact with each other.

In each of the insulating bobbins 13, the inner winding housing frame 13c is in close contact with the head 11c of the tooth member 11, and the outer winding housing frame 13d is formed on the inner circumferential surface of the outer member 10. Close.

A description will be given of a method of manufacturing the stator core having the above configuration. First, as shown in FIG. 2, winding slots 13e, 13e of each independent insulating bobbin 13.
To form a winding 14. At this time, since the winding is a concentrated winding in which one winding 14 is wound for each insulating bobbin 13, the inside of the winding slots 13e, 13e is full, that is, for each winding slot 13e of each insulating bobbin. The windings 14 can be surely formed without any deviation from the line connecting the outer peripheral end of the outer peripheral winding housing frame 13d and the outer peripheral end of the inner peripheral winding housing frame 13c.
Can be wound. When the winding 14 is wound in this manner, there are two winding ends for each insulating bobbin 13 in which the winding of the winding 14 is completed.

When the teeth member 11 with the insulating hobbin 13 mounted thereon is assembled to the outer peripheral member 10 as described above, the winding 14e has a fan shape.
Since the outer peripheral ends of the outer peripheral side winding accommodating frame 13d and the inner peripheral side winding accommodating frame 13c abut each other, there is no gap between the adjacent windings 14, and the windings are closely in contact with each other, and the winding space factor is high. . Further, as described above, in each of the insulating bobbins 13, the inner circumferential side winding housing frame 13 c is in close contact with the head 11 c of the teeth member 11, and the outer circumferential side winding housing frame 13 d is formed on the inner circumferential surface of the outer circumferential member 10. Because there is no radial gap between the outer peripheral member 10, the teeth member 11, and the outer peripheral member 10 of the insulating bobbin 13, the radial dimension of the entire stator core can be set small. However, a high winding space factor can be obtained.

Next, the insulated bobbin 1 where the winding 14 has been completed
The tooth member 11 is inserted from the inner peripheral surface side into the through hole 13b of the third member 3 so that the base 11a protrudes toward the outer peripheral side, and the body 11b
Is fitted into the central through hole 13b of the insulating bobbin 13, and the head 11c on the inner peripheral surface side is brought into contact with the winding accommodating frame 13c on the inner peripheral side of the insulating bobbin 13.

Thereafter, as shown in FIG. 1, the base 11a of the tooth member 11 is press-fitted into the press-fitting groove 10a of the outer peripheral member 10 from the axial direction and assembled to complete the stator. Then, the two winding ends of each insulating bobbin 13 are arbitrarily connected between the insulating bobbins 13 or to a power supply unit (not shown).

In the stator core described above, the winding 14
Is not directly wound on a fixed iron core as in the past,
Since winding can be performed on a single insulating bobbin 13, winding work can be easily performed. Further, the slots 13e of the insulating bobbin 13,
Since the coil can be fully wound, the winding space factor is improved.
Further, since the insulating bobbin 13 and the tooth member 11 are fitted and the tooth member 11 and the outer peripheral member 10 are press-fitted, assembly can be easily performed.

[0030]

As is apparent from the above description, according to the stationary core of the rotating magnetic field type motor according to the present invention, the winding is not wound directly on the stator core, but is wound on each insulating bobbin. After winding, the insulating bobbin is externally fitted to the teeth member, so that adjacent windings do not interfere at the time of winding. Therefore, even if it winds to almost the whole of the winding slot of each insulating bobbin, that is, to the line connecting the outer peripheral end of the outer peripheral side winding accommodating frame and the outer peripheral end of the inner peripheral side winding accommodating frame, the through hole of each insulating bobbin does not The head of the tooth member can be press-fitted into the press-fitting groove of the outer peripheral member and assembled, and the space factor of the winding can be improved, and miniaturization and high output can be achieved. be able to. In addition, as described above, the outer peripheral end of the outer winding housing frame is provided so as to protrude in the circumferential direction from the outer peripheral end of the inner winding housing frame, and the winding wound around each winding slot is provided. Has a fan shape in which the number of windings is larger on the outer peripheral side than on the inner peripheral side, so that the circumferential gap is reduced and the space factor of the windings can be further improved. Further, as described above, according to the stationary core of the rotating magnetic field type motor according to the present invention, the winding is not wound directly on the stator core, but is wound on each insulating bobbin, and then the insulating bobbin is wound. In order to fit the outside of the teeth member
At the time of winding, adjacent windings do not interfere with each other, and the winding operation is facilitated. Furthermore, in order to make the outer peripheral ends of the outer peripheral housing frames of the adjacent insulating bobbins abut each other and to make the outer peripheral ends of the inner peripheral housing frames of the adjacent insulating bobbins abut each other, the circumference between the adjacent windings is reduced. The gap in the direction is minimized, and the space factor of the winding is further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fixed iron core of the present invention.

FIG. 2 is an enlarged sectional view showing a relationship between an insulating bobbin and a tooth member.

FIG. 3 is a front view of an outer peripheral member.

FIG. 4 is a front view of the teeth member.

FIG. 5 is a front view of a tooth member according to a modification.

FIG. 6 is a side view of the insulating bobbin.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a plan view of a conventional fixed iron core.

FIG. 9 is an exploded perspective view of another conventional stator core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Outer peripheral member 10a Press-fit groove 11 Teeth member 11 'Connecting piece 11a Base 11b Trunk 11c Head 13 Insulating bobbin 13a Central part 13b Through hole 13c Inner peripheral winding receiving frame 13d Outer peripheral winding receiving frame 13e For winding Slot 14 winding

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 3/30-3/52 H02K 15/10

Claims (6)

(57) [Claims] 1. A cylindrical outer peripheral member, a plurality of tooth members disposed on an inner peripheral side of the outer peripheral member, a plurality of insulating bobbins respectively attached to the tooth members, and wound around the insulating bobbins, respectively. A stator core of a rotating magnetic field type motor having a plurality of windings, a cylindrical outer peripheral member having a plurality of axial press-fit grooves formed at equal angular intervals on an inner peripheral surface; A base part press-fitted into the press-fitting groove, a body part continuous with the base part, and an arc-shaped head part continuous with the body part are provided. A plurality of teeth members, and a central portion having a through hole that fits through the base of each tooth member and has a through-hole that fits over the body of each tooth member, and base portions of the tooth member on both sides of the central portion. Arc-shaped curved so that the side becomes convex With an interval between the inner winding housing frame and the outer winding housing frame, the outer end of the outer winding housing frame projects in the circumferential direction from the outer end of the inner winding housing frame. A plurality of insulating bobbins of the same shape in which arc-shaped winding slots are formed on both sides of the central portion, and the outer peripheral end of the outer peripheral side winding accommodating frame in each of the insulating bobbin winding slots. A winding in which the outer circumference of the winding slot has a larger number of windings than the inner circumference, and is wound around a line connecting the outer ends of the inner winding housing frame. A stator core of a rotating magnetic field type motor, wherein outer peripheral ends of outer peripheral side housing frames abut each other, and outer peripheral ends of inner peripheral side housing frames of adjacent insulating bobbins abut each other. 2. The insulating bobbin according to claim 1, wherein an inner peripheral winding housing frame is in close contact with the head of the teeth member, and an outer peripheral winding housing frame is in close contact with the inner peripheral surface of the outer peripheral member. The stator core of the rotating magnetic field type electric motor according to claim 1. 3. The press-fit groove formed on the inner peripheral surface of the outer peripheral member has a wide outer peripheral shape, and the base of the tooth member has the same outer peripheral wide shape as the press-fit groove. A stator core for a rotating magnetic field type electric motor according to claim 1. 4. A cylindrical outer peripheral member in which axial press-fit grooves are formed at equal angular intervals on an inner peripheral surface, a base press-fitted into each press-fit groove of the outer peripheral member, and a body continuous with the base. And a teeth member integrally provided with a circular arc-shaped head continuous to the body, and a central part having a through-hole externally fitted to the body, while penetrating the base of each of the teeth members, At both sides of the central portion, a space is formed between the arc-shaped inner circumferential winding housing frame and the outer winding winding frame which are curved so that the base side of the tooth member becomes convex, and A plurality of insulating bobbins of the same shape in which the outer peripheral end is provided so as to protrude in the circumferential direction from the outer peripheral end of the inner peripheral side winding accommodating frame, and arc-shaped winding slots are formed on both sides of the central portion, And a winding wound around a winding slot of each of the insulating bobbins. A method for manufacturing a constant iron core, comprising: winding a winding around a winding slot of each of the insulating bobbins until a line connecting an outer peripheral end of the outer peripheral winding housing frame and an outer peripheral end of the inner peripheral winding housing frame. The body of the teeth member is fitted into the through-hole of each insulating bobbin around which the winding is wound, and the base of the teeth member is protruded to the outer peripheral side of the insulating bobbin. After being brought into close contact with the winding accommodating frame, the base of the tooth member is axially press-fitted into the press-fitting groove of the outer peripheral member, and the teeth member is integrally assembled with the outer peripheral member. In addition to being in close contact with the inner peripheral surface, the outer peripheral ends of the outer peripheral housing frames of adjacent insulating bobbins are in contact with each other, and the outer peripheral ends of the inner peripheral housing frames of adjacent insulating bobbins are in contact with each other. A method of manufacturing a stator core of a rotating magnetic field type armature. 5. The step of winding a winding around the winding slot of the insulating bobbin includes the steps of: setting an outer peripheral end of the outer peripheral winding housing frame and an outer peripheral end of the inner peripheral winding housing frame for each insulating bobbin; The method for manufacturing a stator core of a rotating magnetic field type armature according to claim 4, wherein the winding is a concentrated winding in which the winding is continuously wound up to a connecting line. 6. The rotating magnetic field type armature according to claim 4, wherein the plurality of teeth members have their heads connected by a continuous piece to be integrated in an annular shape. Stator core manufacturing method.