JP2000060046A - Method of manufacturing motor and motor stator - Google Patents

Abstract

(57) [Problem] To reduce the manufacturing cost of a motor in which a coil is directly wound around a stator core via an insulator. SOLUTION: Insulators are provided at end portions of insulators 20 and 20 provided at both ends of a stator core 10 and separately from the end portion insulators 20, respectively, in respective slots 11 of the stator core 10. Arranged
And an in-slot insulator 30 that is in contact with the end-side insulator 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor in which a coil is directly wound around a stator core via an insulator, and a method for manufacturing the motor stator.

[0002]

2. Description of the Related Art As a method of attaching a coil to a stator core of a motor, there are a concentrated winding method in which a coil is wound directly on a stator core via an insulator, and a method in which a coil is wound after being wound.
There is a distributed winding method in which this is fitted into a stator core.

[0003] Among these methods, the conventional motor adopting the concentrated winding method has the following disadvantages.
An insulator provided on one end side and an insulator provided on the other end side provide insulation between the iron core and the coil. Each insulator has an end insulating portion located on the end side of the stator core and an in-slot insulating portion that enters the slot of the stator core, and is integrally formed. The in-slot insulating portions of the insulators overlap each other in the slots of the stator core at intermediate portions in a direction parallel to the central axis of the stator core. Thus, an insulator having an end insulating portion and an in-slot insulating portion is generally
It is formed into a predetermined size by plastic molding, and is a special part for the stator core.

In a conventional motor employing the concentrated winding method, a lead extending from a stator coil is fixed inside a motor housing.

[0005]

However, in the conventional motor, if the length of the stator core in the direction parallel to the central axis changes, the length of the insulating portion in the slot of the insulator needs to be changed. In addition, the insulator must be newly designed and manufactured, and the insulator has an end insulating portion and an in-slot insulating portion, so that the insulator has a complicated shape and is very troublesome to manufacture. That is, the conventional motor has a problem in that the versatility of the insulator is poor and the structure is complicated, so that the manufacturing cost increases.

Further, in the conventional motor, since the lead wire extending from the stator coil is fixed inside the motor housing, for example, the lead of the motor housing relative to the stator coil during driving of the motor causes a lead. The fixing of the wire gradually loosens, and the loosening causes the lead wire to vibrate with respect to the motor housing, and this vibration increases the loosening of the fixing of the lead wire. As a result, there is a problem that the vibration of the motor itself increases. .

Therefore, a first object of the present invention is to provide a motor and a method for manufacturing a motor stator, which can increase the versatility of the insulator, simplify the structure, and reduce the manufacturing cost. is there.

A second object of the present invention is to provide a motor capable of firmly fixing a lead extending from a stator coil.

[0009]

According to a first aspect of the present invention, there is provided a motor in which a coil is directly wound around a stator core having a plurality of slots through an insulator. The insulator is an end-side insulator disposed at both ends of the stator core, and is disposed separately from the end-side insulator in each slot of the stator core. And an in-slot insulator in contact with the insulator.

Here, in the motor, the insulator in the slot has a linear shape extending in the insertion direction in a cross section parallel to the insertion direction in the slot, and the length in the insertion direction is fixed. It is longer than the length in the direction parallel to the center axis of the core, the end-side insulator is recessed in the insertion direction, and a fitting portion into which the end of the in-slot insulator is fitted is formed. preferable.

In the motor, the end-side insulator has a slot formed at a position corresponding to the plurality of slots of the stator core, and is provided between two adjacent slots of the end-side insulator. A groove extending from the inner peripheral side to the outer peripheral side may be formed, a part may be fitted in the groove, and a lead wire fixing band wound around a lead wire extending from the stator coil may be provided. .

In order to achieve the first object, a method for manufacturing a motor stator includes a stator core having a cylindrical shape and a plurality of slots formed therein, and a stator core having a cross-sectional shape of each of the stator cores. A long cross-section insulator that matches the inner peripheral surface shape of the slot, has a linear cross-sectional shape that is much longer than the length in the direction parallel to the central axis of the stator core, End-side insulators provided at both ends and formed with fitting portions into which the ends of the long-slot insulators are fitted, are prepared in advance, and are parallel to the central axis of the stator core. The insulator in the long slot is cut to obtain a insulator in the slot, the insulator in the slot is inserted into the slot of the stator core, and While arranging a body at both ends of the stator core, the The end portion of the in-slot insulator in the slot is fitted into the insertion portion to connect the end-side insulator and the in-slot insulator, and both ends are covered with the end-side insulator, A coil is wound around the stator core whose inner surface is covered with the in-slot insulator.

[0013] In the motor for achieving the second object, a stator coil is directly wound via an insulator on a stator core having a plurality of slots formed therein, and a lead wire is formed from the stator coil. In the extending motor, the insulator has end-side insulators disposed at both ends of the stator core, and the end-side insulators correspond to the plurality of slots of the stator core. A slot extending from the inner peripheral side to the outer peripheral side is formed between two adjacent slots of the end-side insulator, and a part of the groove is fitted in the groove, and a slot is formed in the lead wire. It is characterized by having a lead wire fixing band to be wound around.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a motor according to the present invention will be described below with reference to the drawings.

The motor of the present embodiment is a DC brushless motor, and its stator is, as shown in FIGS. 1 and 2, a stator core 10 and a lead side disposed at an end of the stator core 10. Insulator 20a and non-lead side insulator 20b
(Hereinafter, these insulators are simply referred to as end-side insulators 20) and the slots 11, 11,... Of the stator core 10.
Insulator 30 and stator core 10 disposed in the
A stator coil 40 wound directly through the insulators 20 and 30, a lead wire 49 extending from the stator coil 40, and a lead wire fixing band 50 for fixing the lead wire 49.

As shown in FIG. 2, the stator core 10 has a cylindrical shape, a plurality of slots 11, 11,... Which are recessed from the inner peripheral side to the outer peripheral side and extend in a direction parallel to the central axis C. Are formed.

As shown in FIGS. 2 and 3, the end-side insulator 20 is formed of an insulating resin, and
0, and has a plurality of slots 11, 11, and
Are formed in correspondence with the slots 21, 21,.

FIG. 3 (b) shows the core side of the end-side insulator 20.
And as shown in FIG. 4, the slot 2 of the end-side insulator 20.
1 and a flange 2 which is inserted into the slot 11 of the stator core 10 at the inner peripheral side and the outer peripheral side of the end side insulator 20
2a and 22b are formed. On the iron core side of the end-side insulator 20, further, the inner-side flange 22 a and the outer-peripheral side of the outer-side flange 22 b are recessed toward the non-core side, and the end of the in-slot insulator 30. Fitting grooves 23a, 2 into which the parts are fitted
3b is formed.

On the side opposite to the iron core of the end-side insulator 20, the slot 21 of the end-side insulator 20 and the end-side insulator 20
Weir pieces 24a and 24b for preventing displacement of the stator coil 40 are formed at positions on the inner peripheral side and the outer peripheral side. On the non-core side of the end-side insulator 20, further, at a position between two adjacent slots 21 and 21 of the end-side insulator 20,
A band groove 25 is formed which is recessed toward the iron core and extends from the inner peripheral side to the outer peripheral side of the end-side insulator 20.

As shown in FIG. 5, the in-slot insulator 30 has a cross-sectional shape conforming to the shape of the inner peripheral surface of the slot of the stator core 10, and the longitudinal cross-sectional shape, in other words, the slot insertion shape. The cross-sectional shape in a direction parallel to the direction is a linear shape. The length L1 of the in-slot insulator 30 in the slot insertion direction is slightly longer than the length L0 in the direction parallel to the central axis C of the stator core 10 (thickness direction). In manufacturing the in-slot insulator 30, first, a resin film having an insulating property is bent to form a long in-slot insulator 30a from which a plurality of in-slot insulators 30, 30,. I do. Then, the insulator 30a in the long slot is cut by a necessary length,
The insulator 30 in the slot is obtained.

In assembling the stator, as shown in FIG. 2, first, an in-slot insulator 30 is placed in the slot 11 of the stator core 10. Next, the end-side insulator 20 is attached to the end face of the stator core 10. At this time, the flanges 22a and 22b of the end-side insulator 20 enter the slots 11 of the stator core 10, and the ends of the in-slot insulators 30 are fitted into the fitting grooves 23a and 23b of the end-side insulator 20. Get stuck.
As a result, the end-side insulator 20 is connected to the stator core 10 and also to the in-slot insulator 30.

Next, as shown in FIG. 6, the inner peripheral surface of the slot 11 is fixed to the stator core 10 whose inner surface is covered with the in-slot insulator 30 and whose end surface is covered with the end edge 20. The child coil 40 is wound. In this stator coil 40, a gap is formed between a portion exposed from the stator core 10 and facing the end-side insulator 20 and a band groove 25 of the end-portion insulator 20. The lead wire fixing band 50 is inserted into this gap, and the lead wire fixing band 50 is wound around the stator coil 40 and the lead wire 49, so that the lead wire 4
9 is fixed to the stator coil 40.

As described above, in the present embodiment, even if the length of the stator core 10 in the direction parallel to the central axis C changes, the cutting position of the long in-slot insulator 30a is changed, and If the insulator 30 is obtained, it is possible to easily cope with a change in the size of the stator core 10, and it is not necessary to newly set and manufacture an insulator, and the versatility of the insulator can be improved. Here, the important point is that the in-slot insulator 30 has a linear cross section in a direction parallel to the slot insertion direction. As described above, since the longitudinal sectional shape of the in-slot insulator 30 is a linear shape, the long in-slot insulator 3
If 0a is formed, the insulator 30 in the slot can be easily obtained by simply cutting the required length. In addition, since the insulators are separate from the end-side insulator 20 and the in-slot insulator 30, the shapes of the insulators are simpler than those of an integrated body, and the manufacture is easy. In particular, since the in-slot insulator 30 is obtained by cutting the long in-slot insulator 30a formed by bending a resin film as described above, a molding die is not required, and it is extremely manufactured. Is easy. Therefore, in the present embodiment, the versatility of the insulator is increased and the structure is simplified, so that the manufacturing cost can be reduced.

In this embodiment, the end-side insulator 20
By providing the band groove 25, the lead wire 49 can be fixed to the stator coil 40 by the lead wire fixing band 50, so that the lead wire 49 can be easily fixed, and the stator Even if there is relative vibration of the motor housing with respect to the coil 40, since the lead wire 49 is fixed to the stator coil 40,
9 is not loosened gradually, and the vibration of the motor itself can be suppressed.

[0025]

According to the present invention, even if the length of the stator core in the direction parallel to the central axis changes, it is possible to easily cope with a change in the size of the stator core simply by changing the length of the insulator in the slot. The versatility of the insulator can be improved. Further, since the insulator is an end-side insulator and the insulator in the slot are separate bodies, each of the insulators is simpler in shape and easier to manufacture than an integrated body. Therefore, according to the present invention, the versatility of the insulator is increased and the structure is simplified, so that the manufacturing cost can be reduced.

In the case where a groove is formed in the end-side insulator and a lead wire fixing band is provided, the lead wire can be easily fixed and the motor housing can be moved relative to the stator coil during driving of the motor. Even if there is a typical vibration, the lead wire is fixed to the stator coil, so that the fixing of the lead wire does not gradually loosen, and the vibration of the motor itself can be suppressed.

[Brief description of the drawings]

FIG. 1 is a plan view (a) and a side view (b) of a stator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the stator according to the embodiment of the present invention.

FIG. 3 is a plan view (a) and a side view (b) of an end-side insulator according to an embodiment of the present invention.

FIG. 4 is a plan view (a) of a main part of an end-side insulator according to an embodiment of the present invention, a view (B) viewed from an arrow B, a cross-sectional view (C) of a CC, (D).
It is D sectional drawing (d) and EE sectional drawing (e).

5A is a plan view of the in-slot insulator according to the embodiment of the present invention, and FIG.

FIG. 6 is a schematic view of the stator viewed from the inner peripheral side of the stator core according to the embodiment of the present invention.

[Explanation of symbols]

10 ... stator core, 11 ... stator core slot, 20
... End side insulator, 21 ... Slot of end side insulator, 23
a, 23b: fitting groove, 25: band groove, 30: insulator in slot, 30a: insulator in long slot, 40: stator coil, 49: lead wire, 50: lead wire fixing band.

Continuing from the front page (72) Inventor Tadao Sugiyama 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture F-term in Tachiga Engineering Co., Ltd. (Reference) 5H604 AA08 BB01 BB14 CC01 CC05 CC13 DB01 DB26 PB03 5H615 AA01 BB01 BB14 PP01 QQ12 RR01 RR02 SS05 SS11 TT03

Claims (5)

[Claims] 1. A motor in which a coil is directly wound around a stator core having a plurality of slots formed thereon via an insulator, wherein the insulator is disposed at both ends of the stator core. A part-side insulator, and an in-slot insulator that is provided in each slot of the stator core and is in contact with the end-side insulator, separately from the end-side insulator. Motor. 2. The motor according to claim 1, wherein the insulator in the slot has a linear shape in which a cross-sectional shape parallel to a direction of insertion into the slot extends in the direction of insertion.
The length in the insertion direction is longer than the length in the direction parallel to the central axis of the stator core, the end-side insulator is recessed in the insertion direction, and the end of the in-slot insulator is fitted. A motor, wherein a part is formed. 3. The motor according to claim 1, wherein the end-side insulator has a slot formed at a position corresponding to the plurality of slots of the stator core. A groove extending from the inner peripheral side to the outer peripheral side is formed between two adjacent slots of the unit side insulator, and a part of the groove is fitted into the groove, and a lead wire fixed around the lead wire extending from the stator coil is fixed. A motor comprising a band. 4. A method of manufacturing a motor stator in which a coil is wound directly around a stator core via an insulator, wherein the stator core has a cylindrical shape and has a plurality of slots formed therein. The surface shape matches the inner peripheral surface shape of each slot of the stator core, the longitudinal cross-sectional shape is a linear shape, and the inside of the long slot is much longer than the length in the direction parallel to the central axis of the stator core. Insulators, and end-side insulators provided at both ends of the stator core and formed with fitting portions into which the ends of the long slot insulators fit, are prepared in advance, According to the length in the direction parallel to the central axis of the stator core, cut the insulator in the long slot to obtain an insulator in the slot, the insulator in the slot in the slot of the stator core And insert the end-side insulator into the stator core The ends of the in-slot insulator in the slot are fitted into the fitting portions of the end insulator while disposing at both ends of the insulator, and the end insulator and the in-slot insulator are connected to each other. Connected to the stator core, both ends of which are covered with the end side insulator, and the inner surface of the slot is covered with the insulator in the slot.
A method for manufacturing a motor stator, comprising winding a coil. 5. A motor in which a stator coil is directly wound around a stator core having a plurality of slots formed thereon via an insulator, and a lead wire extends from the stator coil. An end-side insulator provided at both ends of the stator core, wherein the end-side insulator has a slot formed at a position corresponding to the plurality of slots of the stator core; A groove extending from the inner peripheral side to the outer peripheral side is formed between two adjacent slots of the side insulator, and a part of the groove is fitted into the groove, and a lead wire fixing band wound around the lead wire is provided. A motor characterized by the following.