JPH08182265A - Armature of electric rotary machine - Google Patents

Abstract

PURPOSE: To provide an armature of electric rotary machine equipped with winding bobbins having a stable quality at a low cost. CONSTITUTION: In an armature of an electric rotary machine equipped with a ring-shaped yoke 1, a convex pole 2 fixed inside the yoke 1, and a winding bobbin 4 having a hollow portion 41 wound with an armature winding 3, a joint portion 23 extending from a tip portion 22 of the convex pole 2 to peripheral direction or a pole shoe and a recessed portion 44 is provided on one side surface of a collar portion 43 at the tip side provided at one end of a hollow portion 41 of the winding bobbin 4, and a projected portion 45 having a size capable of inserting to the recessed portion 44 through a gap is provided on another side surface. And the projected portion 45 of another winding bobbin 4 is inserted to the recessed portion 44 of other winding bobbin 4 between winding bobbins 4 mutually adjacent to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature for a rotary electric machine having a winding bobbin for mounting an armature winding on a convex pole of a ring-shaped armature core having a plurality of slots.

[0002]

2. Description of the Related Art Conventionally, in an armature of a rotary electric machine in which a plurality of slots are provided in a ring-shaped armature core and convex poles projecting radially are formed between the slots, armature windings are provided on the convex poles. To wind. In this case, in order to efficiently wind the armature winding, a winding bobbin corresponding to the shape of the slot is formed of an insulating material such as synthetic resin, and the armature winding is wound in advance on the winding bobbin, The winding bobbin is inserted into the salient pole, and mold resin is injected into the slot to fix the salient pole and the winding bobbin. By the way, when the molding resin flows into the slot, the armature winding wound on the winding bobbin is pushed out together with the molding resin and falls off, and it protrudes from the gap created between the winding bobbins attached to each salient pole. , Direct contact with the armature core may cause insulation failure. As a measure against this problem, as shown in FIG. 4, a winding bobbin 4 having an armature winding 3 wound thereon is attached to a salient pole 2 fixed inside a ring-shaped yoke 1. A yoke-side flange portion 42 and a tip-side flange portion 43 are provided at both ends of the hollow portion 41 of
The armature windings 3 which have fallen off are arranged so that the collar portions of the adjacent winding bobbins 4 overlap each other, and the salient poles 2 and pole shoes 2
No. 4, which prevents contact with 4 (eg,
JP-A-1-133541). In this case, the notches 46 are provided on the inner side of the collar portion of the one winding bobbin 4 and the outer side of the collar portion of the other winding bobbin so that the overlapping portions do not become thick, so that they are not displaced from each other. The notches 46 of both flanges are fitted.

[0004]

However, in the prior art, since the notches provided in the overlapping collars of the adjacent winding bobbins are fitted, it is necessary to increase the dimensional accuracy of the winding bobbins, which results in cost reduction. It had the drawback of being expensive. Also,
Since the winding bobbin is formed by injection molding or compression molding, when the winding bobbin has a dimensional error due to an error in the material or molding temperature, the winding bobbin cannot be mounted on the salient pole, or the resin inside the yoke. There was a problem that the armature winding was damaged due to rattling in the process until molding.
An object of the present invention is to provide an armature for a rotary electric machine provided with a winding bobbin of stable quality at low cost.

[0004]

In order to solve the above problems, the present invention provides a ring-shaped yoke, a salient pole fixed to the inside of the yoke, and an armature winding mounted on the salient pole. In an armature of a rotating electric machine provided with a winding bobbin having a wound hollow portion, a connecting portion or a pole shoe extending in the circumferential direction from the tip of the salient pole, and one end of the hollow portion of the winding bobbin. A concave portion is provided on one side surface of the provided tip side flange portion, and a convex portion having a size that can be inserted into the concave portion through a gap is provided on the other side surface, and one of the winding bobbins adjacent to each other is provided. The convex portion of the other winding bobbin is inserted into the concave portion of the winding bobbin.

[0005]

With the above-mentioned means, between the winding bobbins adjacent to each other, the concave portion provided on one side surface of the tip side flange portion of one winding bobbin is provided with the other of the tip side flange portions of the other winding bobbin. Insert the convex part provided on the side surface. In this state, a gap is formed between the concave portion and the convex portion on the side surface of the adjacent tip side flange portion, but by molding the insulating resin inside the yoke, a part of the armature winding is Even if it falls off from the tip side flange portion, it rides on the convex portion, so that it does not directly contact the joint portion and thus does not cause insulation failure.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view showing an embodiment of the present invention. In the figure, 1 is a yoke made of a ring-shaped magnetic material, 2 is a plurality of convex poles arranged in a ring shape, 21 is a yoke side end fixed to the inside of the yoke 1 of the convex pole 2, and 22 is a tip. Of the convex poles 2 adjacent to each other,
It is connected in a ring shape by a connecting portion 23 extending from the circumferential direction. Reference numeral 3 is an armature winding, and 4 is a winding bobbin made of an insulating resin. As shown in FIGS. 2 (a) and 2 (b), a hollow portion 41 and a yoke-side flange portion 42 at one end thereof, and the other A front end side flange 43 is provided at the end. A concave portion 44 is provided on one side surface of the tip side flange portion 43, and a convex portion 45 having a size that can be inserted into the concave portion 44 through a gap is provided on the other side surface. The armature winding 3 is wound around the hollow portion 41 of the winding bobbin 4, and is wound in a space between the yoke side flange portion 42 and the tip side flange portion 43 for a predetermined number of turns.

When the winding bobbin 4 having the armature winding 4 wound a predetermined number of turns is mounted on the salient pole 2, the yoke side end portion 21 of the salient pole 2 connected by the connecting portion 23 to the tip side collar portion. 43 is inserted. At this time, as shown in FIG.
Between the winding bobbins 4 adjacent to each other, in the recess 44 provided on one side surface of the tip side flange portion 43 of one winding bobbin 4,
The convex portion 45 ′ provided on the other side surface of the tip side flange portion 43 ′ of the other winding bobbin 4 ′ is inserted. In this way, the winding bobbin 4 is sequentially mounted on the salient pole 2. When the winding bobbins 4 have been attached to all the salient poles 2, the yoke 1 is fitted to the outside of the yoke-side end portion 21 of the salient poles 2 to form a space surrounded by the yoke 1, the salient poles 2 and the connecting portion 23. Mold the insulating resin. In this state, there is a gap between the concave portion 44 and the convex portion 45 'on the side surface of the adjacent tip side flange portion 43,
As shown by the alternate long and short dash line in FIG. 2C, the armature winding 3 is formed by molding an insulating resin inside the yoke 1.
Even if a part of it falls off from the tip side flange portion 43, since it is on the convex portions 45 and 45 ′, the direct connecting portion 23
It does not come into contact with and does not cause insulation failure.
The shape of the concave portion 44 and the convex portion 45 may be curved as shown in FIG. 3 (a), or, as shown in FIG. 3 (b), the armature windings may be fitted together. As long as the convex portion of the tip side flange portion supports a part of the above, the same effect can be obtained even if the gap between the concave portion and the convex portion is somewhat large.

[0008]

As described above, according to the present invention, a concave portion is provided on one side surface of the front end side flange portion of the winding bobbin and a convex portion is provided on the other side surface thereof to form a concave portion of the adjacent winding bobbin. Since the convex portion and the convex portion are fitted with a gap therebetween, even if the armature winding falls off from the winding bobbin, it does not come into contact with the iron core and insulation can be prevented. Further, since the winding bobbin is mounted on the convex pole with a gap between the concave portion and the convex portion, it is not necessary to process the winding bobbin with strict dimensional accuracy, the cost of the winding bobbin can be reduced, and the resin inside the yoke can be reduced. An effect that can provide an armature for a rotating electric machine equipped with a winding bobbin of stable quality, which does not cause rattling in the process until molding and does not damage the armature winding mounted on the winding bobbin. There is.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2A shows a winding bobbin according to an embodiment of the present invention.
-A sectional view taken along section A, (b) a plan view, and (c)
It is a top view which shows the relationship of an adjacent bobbin.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a front view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 yoke, 2 convex pole, 21 yoke side end part, 22 tip part, 23 joining part, 24 pole shoe, 3 armature winding, 4 winding bobbin, 41 hollow part, 42 yoke side flange part, 43 tip side flange Part, 44 recess, 45, 45 '
Convex

Claims (1)

[Claims] 1. A rotation provided with a ring-shaped yoke, a convex pole fixed to the inside of the yoke, and a winding bobbin attached to the convex pole and having a hollow portion around which an armature winding is wound. In an armature of an electric machine, a connecting portion or a pole shoe extending in the circumferential direction from the tip portion of the salient pole, and a concave portion provided on one side surface of the tip side flange portion provided at one end of the hollow portion of the winding bobbin, A convex portion having a size that can be inserted into the concave portion through a gap is provided on the other side surface, and between the winding bobbins adjacent to each other, the concave portion of one winding bobbin is provided with the convex portion of the other winding bobbin. An armature of a rotating electric machine, characterized in that the armature is inserted.