JPH0511754U - Stator core of rotating electric machine - Google Patents

Abstract

(57) [Abstract] [Purpose] A stator core of a rotating electric machine, in which a tooth portion is attached to a yoke portion, and the tooth portion can be attached to the yoke portion without any positional deviation from the yoke portion. I will provide a. [Constitution] A yoke portion 1 formed by laminating a large number of steel plates
In FIG. 1, a fitting hole 12 that is a fitting recess is formed. On the other hand, this is also a convex portion that fits into the fitting hole 12 by partially projecting a part of the steel plate to the end face 15c of the tooth portion 15 that is formed by caulking and joining a number of silicon steel plates in a laminated state. 16 is formed. Each tooth portion 15 is press-fitted in the direction of arrow A so that the convex portion 16 fits into the fitting hole 12, and the end face 1
5c is attached in a state of being joined to the inner peripheral surface of the yoke portion 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stator core of a rotating electric machine in which a tooth portion formed by stacking a large number of steel plates is attached to a yoke portion formed by stacking a large number of steel plates.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, for example, a stator core of an electric motor includes a yoke portion having a rectangular frame shape and a plurality of, for example, four teeth portions attached to an inner peripheral portion of the yoke portion. FIG. 4 shows a conventional structure of this type of stator core.

That is, the yoke portion 1 is formed by laminating and fixing a large number of steel plates, and has a rectangular frame shape with rounded corners. On the other hand, the tooth portion 2 is also configured by laminating and fixing a large number of steel plates in the same manner, but here, the four tooth portions 2 are formed by the narrow bridge portion 3 at the inner peripheral side portion. It is integrally connected to form a connecting tooth portion 4. The circular space of the inner peripheral portion of the connecting teeth portion 4 is a field space in which a rotor (not shown) is arranged.

The connecting teeth portion 4 is attached to the inside of the yoke portion 1 by, for example, press fitting in a state in which coils (not shown) are attached to the respective teeth portions 2 so that a stator is formed. There is. In this case, a groove portion 1a extending in the thickness direction (stacking direction) is formed at the center portion on the inner surface side of each side portion of the yoke portion 1, and the connecting tooth portion 4 draws the end portion of each tooth portion 2 into these groove portions 1a. It is designed to be pressed in by inserting from above.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the groove portion 1a formed in the yoke portion 1 extends in the thickness direction and is opened on both upper and lower surfaces of the yoke portion 1, the tooth portion 2 is inserted into the groove portion 1a in the thickness direction. At this time, it is not easy to position the tooth portion 2 with respect to the yoke portion 1 in the thickness direction, and there is a case where a positional deviation occurs between the two in the thickness direction.

Therefore, an object of the present invention is to attach the teeth portion to the yoke portion, and to provide a rotating electric machine in which the teeth portion can be attached without displacement of the teeth portion. It is to provide the stator core.

[0007]

[Means for Solving the Problems]

 The stator core of the rotating electric machine of the present invention has a yoke portion formed by laminating a large number of steel plates, and a tooth portion formed by laminating a large number of steel plates, the end surface of which is the joint surface of the yoke portion. It is mounted so as to be joined, and one of the end faces of the teeth part and the joining face of the yoke part is partially covered with a part of a large number of steel plates forming the parts. It is characterized in that a protruding portion is formed by projecting it and a fitting concave portion into which the protruding portion is fitted is formed on the other side.

[0008]

[Action]

 According to the above means, the tooth portion is attached with its end surface joined to the joining surface of the yoke portion. At this time, the convex portion and the fitting concave portion are fitted to each other. In this case, the convex portion is formed by partially projecting a part of the laminated steel sheets, so that the teeth and the yoke are fitted by fitting the convex portion and the fitting concave portion. The part and the part are overlapped in the stacking direction.

Therefore, the teeth and the yoke are positioned in the stacking direction of the steel plates by the fitting of the protrusion and the fitting recess, and as a result, the teeth are misaligned with respect to the yoke. Can be installed without.

[0010]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 11 denotes a yoke portion, which is formed by caulking and joining a large number of silicon steel plates in a laminated state, and has a rectangular frame shape with rounded corners.

A fitting hole 12, which is a fitting recess, is formed in each of the central portions of the four sides of the yoke portion 11 so as to penetrate each side in the width direction. In this case, the yoke portion 11 has a shape obtained by cutting a punched steel plate 13 punched into a rectangular frame shape and the center portions of the four sides of the punched steel plate 13 with a predetermined width (substantially equal to the width of the teeth portion described later). It is formed by arranging a plurality of punched steel plates 14 in the middle part and arranging a plurality of rectangular frame-shaped punched steel plates 13 on the upper and lower sides thereof, respectively. Is becoming

On the other hand, reference numeral 15 denotes a tooth portion, which is also formed by caulking and joining a large number of silicon steel plates in a laminated state, and has a substantially arc-shaped magnetic pole at the tip of a coil mounting portion 15a to which a coil (not shown) is mounted. It has a shape integrally including the portion 15b. As will be described later, the teeth portion 15 is attached to the yoke portion 11 such that the end surface 15c of the coil mounting portion 15a is joined to the inner peripheral surface (joint surface) of the yoke portion 11. There is.

A protrusion 16 is formed on the tooth portion 15 at an intermediate portion in the thickness direction of the end face 15c. In this case, the convex portion 16 is formed by forming a part of the steel plate, which is arranged in the middle portion of the steel plate forming the tooth part 15, so as to be longer than the original coil mounting part 15a by the width dimension of the yoke part 11. By doing so, it is formed so as to project from the end surface 15c, and is sized to fit in the fitting hole 12.

In the tooth portion 15 thus configured, four coils are attached to the center portion of each side of the yoke portion 11 in a state where a coil (not shown) is attached to the coil attachment portion 15a. The yoke 11 and the four teeth 15 form a stator core. At this time, each tooth portion 15 is press-fitted in the direction of arrow A using, for example, a press-fitting jig (not shown) so that the convex portion 16 fits into the fitting hole 12 of the yoke portion 11, and thus the end face 15c. Is attached to the inner peripheral surface of the yoke portion 11, which is a joint surface. In this state, the upper and lower surfaces of the yoke portion 11 and the upper and lower surfaces of the tooth portion 15 are flush with each other.

According to the above-mentioned configuration, the convex portion 16 is formed by partially projecting a part of the plurality of steel plates forming the tooth portion 15 so that the convex portion 16 is fitted to the convex portion 16. By fitting the holes 12 into the holes 12, the teeth 15 and the yoke 11 are partially overlapped in the stacking direction.

Accordingly, the teeth portion 15 and the yoke portion 11 are positioned in the laminating direction of the steel plates by the fitting of the convex portion 16 and the fitting hole 12, and as a result, the yoke portion 1 of the teeth portion 2 is positioned. Unlike the conventional one in which the positioning in the thickness direction is not easy with respect to each other and a displacement may occur between the two in the thickness direction, the tooth portion 15 is surely placed in a state in which there is no displacement with respect to the yoke portion 11. Can be installed.

Further, in this case, in the conventional device shown in FIG. 4, when the connecting teeth portion 4 is press-fitted, the press-fitting jig is configured to be press-fitted from above, so that the site where the press-fitting jig is arranged is limited and the coil is damaged. I was afraid. On the other hand, in this embodiment, since the teeth portion 15 is press-fitted in the direction of arrow A (lateral direction), the degree of freedom of the portion where the press-fitting jig is arranged is increased, and the coil can be prevented from being damaged. Such advantages are also obtained.

FIG. 2 shows a second embodiment of the present invention. The difference from the first embodiment is that the yoke portion 21 is fitted in the upper half portion in the drawing and also opened upward. The point is that the concave portion 22 is formed and the convex portion 24 is also formed in the upper half portion of the tooth portion 23. According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the tooth portion 23 can be press-fitted from above.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, the yoke portion 31 is provided with the fitting recess 32 only on the inner peripheral surface (joint surface) side in the upper half portion in the stacking direction. With this configuration, the punched steel plates that form the yoke portion 31 are located in the upper half part, and like the lower half part, are entirely connected in a frame shape. The yoke portion 31 can be configured more easily than in the case of the example.

In addition, by assembling the four teeth parts 33 by connecting the four teeth parts 33 by the bridge part 34 to form the connection teeth part 35, the four teeth parts 33 are divided by one pole and the assembling work is performed. Can be made easier.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings. For example, a convex portion may be formed on the yoke portion side and a concave portion may be formed on the tooth portion side. Various modifications are possible within a range not departing from the gist of the invention, such as the yoke may be composed of a plurality of divided bodies.

[0022]

[Effect of the device]

 As is apparent from the above description, according to the stator core of the rotating electric machine of the present invention, one of the end faces of the teeth portion and the joint surface of the yoke portion has a large number of steel plates among them. Since a part of the steel plate is partially projected to form a convex part, and a fitting concave part to which the convex part fits is formed on the other side, there is no misalignment with the yoke part. It has an excellent effect that the teeth part can be attached.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a stator core showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of a stator core showing a second embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part of a stator core showing a third embodiment of the present invention.

FIG. 4 is an exploded perspective view of a stator core showing a conventional example.

[Explanation of symbols]

In the drawings, 11, 21 and 31 are yoke portions, 12 is a fitting hole (fitting recess), 13 and 14 are punched steel plates, 15, 23, and
33 is a tooth portion, 15c is an end face, 16 and 24 are convex portions,
Reference numerals 22 and 32 denote fitting recesses.

Claims (1)

[Claims for utility model registration] [Claim 1] To a yoke portion formed by laminating a large number of steel plates, a teeth portion formed by laminating a large number of steel plates is joined at its end surface to the yoke portion. A plurality of steel plates forming a part of one of the end surfaces of the teeth portion and the joining surface of the yoke portion, which are attached so as to be joined to the surfaces. A stator core of a rotating electric machine, characterized in that a convex portion is formed by projecting the convex portion, and a fitting concave portion into which the convex portion is fitted is formed on the other side.