JPS6035929A - Coupling structure of pole core and yoke in electromagnetic machine - Google Patents

Abstract

PURPOSE:To facilitate machining and assembling by forming an engaging recess at either one of a pole core and a yoke, forming an engaging projection at the other, and forming a slit on the projection. CONSTITUTION:A plurality of stator pole cores 3a, 3b are disposed on the outer periphery of a stator yoke 1, and a charging winding 4 is wound on pole cores 3a, 3b. A dovetail engaging recess 5 is formed on the yoke 1, and an engaging projection 6 to be engaged with the recess 5 is formed at the core 3a. A slit 8 opened on the outer periphery is formed at the projection 6. The slit 8 formed at the projection 6 accelerates the elastic deformations of swelled portions 7, 7, which are elastically bonded by returning to the inner surface of the recess 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupling structure between a stacked iron core and a yoke on the stator side or rotor side of an electromagnetic machine such as a rotary or linear motor or a generator.

Generally, in this type of electromagnetic machine, if the stacked iron core and the yoke are integrally formed, the yoke becomes an obstacle when winding the winding around the stacked iron core, and therefore the winding work becomes troublesome. For this reason, a structure has been adopted in which the stacked iron core and the yoke are configured separately, and the stacked iron core is connected to the yoke after the winding is wound around the stacked iron core.

As a conventional structure for connecting a stacked iron core to a yoke, Japanese Patent Publication No. 54-35642 and Utility Model Publication No. 53-2512 have been proposed.
Publication No. 8 is known.

In the former type, the stacked iron core is fixed to the yoke by a bolt, but in this case, as shown in Figure 4 of the publication, when the magnetic pole of the armature passes near the stacked iron core, the action of electromagnetic force occurs. Since the direction is reversed, the stacked iron cores are swung back and forth, causing bolts to loosen and causing vibrations and noise.

The latter type has a structure in which the stacked iron core is press-fitted into a dovetail groove formed in the yoke and fixed, but this type requires high-precision control of the machining dimensions of the press-fitted part, making machining troublesome and There is also the problem that the work is labor-intensive, and once rattling occurs, the binding force due to magnetic force is weakened, and the rattling is amplified, making it easier to increase the digging width and generate noise.

The present invention has been made to eliminate such conventional drawbacks, and is a stacked iron core and joint in an electromagnetic machine that is easy to process and assemble and provides sufficient fixing force without requiring much attention to dimensional control. The purpose is to provide a bonded structure for iron.

In the present invention, a fitting recess is formed in one of the stacked iron core and the yoke, a fitting protrusion is provided in the other, and a slit is formed in the fitting protrusion so that the fitting protrusion can be elastically deformed. The fitting protrusion should snap into the recess.
It is characterized by combining a Yoshi-stacked iron core and a yoke.

An embodiment of the present invention will be described below based on a multipolar generator shown in FIGS. 1 to 3.

In the figure, 1 indicates a stator yoke, and a rotor (not shown) is accommodated in a through hole 2 formed in the center. A plurality of stator pole cores 3a... and 3b... are arranged on the outer periphery of the stator yoke 1, and each of these stacked cores 3a...
Charge winding 4... is wound around 3b.... Among the stacked cores mentioned above, those indicated by 3a... are formed separately from the yoke 1 and are connected by means described later, and those indicated by 3b... are formed integrally with the yoke I. ing.

The stacked iron core 3a, which is constructed separately from the yoke 1, is connected to the yoke 1 by the structure shown in FIG.
For example, a dovetail-shaped fitting recess 5 is formed in the
On the other hand, a fitting protrusion 6 that fits into the fitting recess 5 is formed on the stacked iron core 3a. Since the fitting recess 5 has a dovetail shape, that is, the depth is wider than the opening,
The fitting protrusion 6 has bulges 7.7 on the left and right sides. The fitting protrusion 6 has a slit 8 formed on its outer surface. The bulge 7 has the slit 8.
, 7 are elastically deformed so as to approach each other, and due to this returning action, the outer surface of the bulged portion 7.7 comes into close contact with the inner surface of the four portions 5 with an interference. The stacked iron core 3a is coupled to the yoke 1 by this impact.

According to this embodiment of the structure, the slit 8 formed in the fitting protrusion 6 promotes elastic deformation of the bulging part 7.7, and as a result of the return, the bulging parts 7, 7 are brought into contact with the inner surface of the fitting recess 5. The friction caused by this interference causes the stacked iron core 3a and the yoke 1 to
At the same time, the outer surface of the bulging portion 7.7 adjusts to the inner shape of the fitting recess 5, and the two are brought into close contact with each other. In this close contact, the electromagnetic force generated between the stacked iron core 3a and the yoke I is effectively applied to attract them, so that the binding force between them is maintained even stronger.

Particularly in the case of this embodiment, the fitting recess 5 is a dovetail groove and 9
, the bulging portions 7, 7 prevent the stacked iron core 3a from being pulled out.

In addition, with such a structure, since the fitting protrusion 6 is elastically deformed by the slit 8, there is no need to pay attention to the machining dimensional accuracy of the fitting recess 5 and the fitting protrusion 6. Even if there is a machining error, it is absorbed by the above-mentioned elastic deformation, so an appropriate tightening allowance can be obtained. Therefore, large variations in tightening allowance do not occur.

For this reason, the stacked iron cores 3a... do not shake against the yoke I, and noise and the like are prevented.

In the above embodiment, the fitting recess 5 is formed into a dovetail shape, and the fitting protrusion 6 is formed with bulges 7, 7, but the present invention is not limited to this, and the modification shown in FIG. As in the example, both the fitting recess 5 and the fitting protrusion 6 may be straight.

Furthermore, if the rivet 50 is press-fitted into the slit 8 as shown in FIGS. Since they are firmly crimped, the bonding force becomes stronger and the adhesion is even better, so that the reliability of the electromagnetic bonding action is further improved.

The same effect can be obtained even if a wedge 70 shown in FIGS. 7 and 8 is used instead of the rivet 50.

However, the present invention is not limited to generators, but may also be motors. In the case of a motor, either a rotary type or a linear type can be used.

Furthermore, the present invention is applicable to not only the stator side but also the rotor side.

Furthermore, the fitting protrusion 6 may be formed on the yoke 1 side, and the fitting recess 5 may be formed on the stacked iron core 3a... side.

As described above, according to the present invention, a fitting recess is formed in one of the stacked iron core and the yoke, a fitting projection is provided in the other, and a slit is formed in the fitting projection. Since the protrusion is elastically expandable and contractible, and the core fitting insertion protrusion is made to snap into the fitting recess, the stacked iron core and the yoke are coupled based on the tightness caused by this snapping. In other words, in this case, since the fitting protrusion is elastically deformed, even if there is variation in dimensional accuracy during processing, this variation can be absorbed by the elastic deformation and an appropriate tightening margin can be obtained. Therefore, processing and assembly becomes easy. During operation, the stacked iron core and yoke are in close contact with each other, and the magnetic force between them acts effectively as a binding force. Iron is strongly bonded.

[7] Even if a force such as shaking the stacked iron is applied due to electromagnetic force during operation, since the two are elastically connected, there is no rattling between the two and the generation of noise is also prevented. There is.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention.
The figure is a side view showing the stator of a multi-pole generator, Figure 2 is another side view, Figure 3 is an exploded side view showing the coupling structure of the yoke and stacked iron core, and Figure 4 is another implementation. An exploded side view of a joint structure of a yoke and a stacked iron core showing an example, and FIGS. 5 and 6 show a modification of the present invention! , 7, FIG. 5 is a side view, FIG. 6 is a sectional view taken along the line Vl-Vl in FIG. The side view, FIG. 8, is a sectional view taken along the line ■-■ in FIG. I...Yoke, 3a...Stacked iron core, 4...Winding, 5.
... Fitting recess, 6... Fitting protrusion, 7... Swelling part, 8
...Slit, 50...Rivet, 70...Wedge. Applicant's agent Patent attorney Takehiko Suzue 9- F-1 Figure 4 Figure 7 Figure 8

Claims (2)

[Claims] (1) In an electromagnetic machine that connects a stacked core with a winding wound to a separate yoke, a fitting recess is formed in either the stacked core or the yoke, and a fitting recess is formed in the other. An electromagnetic machine characterized in that the stacked iron core and the yoke are connected by providing a protrusion, forming a slit in the fitting protrusion, and snapping the fitting protrusion into the fitting recess. Combined structure of stacked iron core and yoke. (2) A structure for connecting a stacked iron core and a yoke in an electromagnetic machine according to claim (1), wherein an expansion member for forcibly expanding the width of the slit is fitted into the slit.