JPS6033719Y2 - Rotating electrical machine core alignment device - Google Patents

Description

[Detailed description of the invention] This invention is a device for aligning the iron core of a rotating electrical machine used in an electric motor for engine starting, etc., especially when the iron core is fixed to the yoke by an automatic assembly machine. The present invention relates to a device for reliably realizing circumferential alignment.

Conventionally, in order to secure the iron core and the yoke, a protrusion is formed on the head of the field iron, and the protrusion is inserted into the through hole drilled in the yoke, and the field iron is inserted into the inner peripheral side of the yoke. In addition, the field coil, field core, and yoke were fixed together by riveting the tip of the protruding portion of the field core with the field coil sandwiched between the field core and the yoke.

However, attachment of the field core to the yoke is done manually and is very time consuming.

In order to solve this problem, it has been proposed to use an automatic assembly machine to attach the field core to the yoke. The insertion positions do not match easily, making it difficult to align the protrusion with the through hole, which has the disadvantage that efficient installation is impossible.

This invention provides an excellent positioning device for the iron core of a rotating electrical machine that eliminates the above-mentioned drawbacks. A field core equipped with a protrusion having a positioning part consisting of a convex part is attracted and fixed via a permanent magnet, and has a positioning part having a shape corresponding to the positioning part at the tip of the protrusion of the field core. The field core and yoke are aligned in the circumferential direction by moving the positioning device installed in the circumferential direction to match the through hole of the yoke in the radial direction and fitting both positioning parts together. It is designed to be easily realized.

The illustrated embodiment will be described below.

FIG. 1 is a partial cross-sectional view showing a state in which the field core 1 and the yoke 2 are fixed together. After being inserted into 2a, the two are shown fixed together by riveting.

Four through holes 2a are formed in the yoke 2, and the shape becomes wider toward the outer periphery.

Note that 3 is a field coil held between the yoke 2 and the field iron core 1.

FIG. 2 shows a front view of the field core 1 before the head protrusion 1a is riveted, and 1b is a concave part that is a positioning part formed at the tip of the head protrusion 1a, and has a conical shape. Eggplant.

Next, an example of the iron core positioning device of this invention will be explained with reference to FIG.

In FIG. 3, reference numeral 1 indicates the field core 1 shown in FIG. 2 in cross-section.

Reference numeral 4 denotes a substantially disk-shaped support body that supports a movable body 5, which will be described later, so as to be movable in the radial direction, and this support body 4 is movable in the axial direction together with the movable body 5, which will be described later.

Reference numeral 5 denotes a movable body supported on the outer periphery of the support body 4 at four positions that can match the insertion position where the protruding portion 1a of the field core 1 is inserted into the through hole 2a of the yoke 2. It is movable in the radial direction.

Reference numeral 6 denotes a permanent magnet which is an attracting member fixed to the outer periphery of each of these movable bodies 5, and 7 corresponds to each of the above-mentioned movable bodies 5 and is installed at four positions that completely coincide with the above-mentioned insertion position in the circumferential direction. A conical protrusion 7a is formed corresponding to the recess 1b of the protrusion 1a, and is movable in the direction of the arrow in the figure.

In the device configured as described above, the operation when attaching the field core 1 to the yoke 2 using an automatic assembly machine will be described.

First, each permanent magnet 6 fixed to the movable body 5 is
(not shown), the four field cores 1 are attracted and attached as shown in FIG.

In this state, the field core is not in the completely inserted position, so the protruding portion 1 of the field core must be corrected.
It is necessary to match the hole a with the through hole 2a of the yoke in the circumferential direction.

That is, the position determining device 7 moves toward the field core 1, and its convex portion 7a attempts to fit into the concave portion 1b of the protrusion portion 1a of the field core by applying a pressing force.

Therefore, the field core 1 moves in the circumferential direction on the attraction surface with the permanent magnet 6, and finally the convex portion 7a completely fits into the concave portion 1b.

As a result, the field core 1 is accurately aligned with the yoke 2 in the circumferential direction.

In this state, for example, the support body 4 that supports the movable body 5 moves in the axial direction and comes to the inner peripheral part of the yoke 2, so that the relative positioning of the field core 1 and the yoke 2 in the axial direction is achieved. As this is carried out, each movable body 5 moves toward the yoke 2, that is, toward the outer circumference, and the protruding portion 1a of the field core 1 is inserted into the through hole 2a of the yoke 2.

In order to rivet the concave portion 1b of the protruding portion 1a, a rotating body (not shown) is brought into contact with the protruding portion 1a and rotated.
The field core 1 is fixed to the yoke 2 by riveting the tip of a, or by using a combination of riveting and welding, thereby firmly and reliably attaching the field coil 3.

This state is shown in FIG. 1 as described above.

Note that the protrusion 1a and recess 1b of the field core 1 can be easily formed by cold forging or the like.

In the above embodiment, the protrusion 1a of the field core 1 has a recess 1b.
Although a convex portion may be formed, in that case, the convex portion 7a of the position determining device 7 may be changed to a concave portion.

Further, in the above embodiment, the recess 1b. Although the convex portion 7a has been described as having a conical shape, it is only necessary that the convex portion 7a can move relatively when the two are fitted together, and it may be a tapered positioning portion.

As described above, this invention provides a field magnet in which a movable body supported by a support and movable in the radial direction is provided with a protruding part having a positioning part that prevents a tapered concave part or a tapered convex part from forming at the tip. The iron core is attracted and fixed by a permanent magnet, and the positioning part has a shape corresponding to the positioning part at the tip of the protruding part of the field iron core, and is provided at a position that matches the through hole of the yoke in the circumferential direction. By moving the device radially and fitting both positioning parts, the field core and yoke are aligned in the circumferential direction. The protrusion can be easily inserted into the through hole of the yoke, and the assembly efficiency can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing the field core 1 fixed to the yoke 2, FIG. 2 is a front view of the field core 1, and FIG. 3 is a schematic configuration of the core positioning device of this invention. It is a diagram. In the figure, 1 is a field core, 1a is a protrusion, 1b is a recess, 2 is a yoke, 2a is a through hole, 5 is a movable body, 6 is a permanent magnet, 7 is a position determining device, and 7a is a convex portion. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Claims for Utility Model Registration] A permanent magnet part for attracting and fixing a field core, which has a protrusion having a positioning part consisting of a tapered recess or a tapered convex part at the tip, and a permanent magnet part for attracting and fixing the field core. a movable body that is supported and arranged on a support body at multiple locations on the circumference corresponding to the through holes of the yoke into which the protruding parts are inserted, and that moves in the radial direction on the support body; It has a positioning part that is provided at a position that matches in the circumferential direction and has a shape that corresponds to the positioning part at the tip of the protruding part of the field core, and moves in the radial direction to fit both of the positioning parts and move the movable part. A rotating electric machine core positioning device equipped with a positioning device that moves the field core on the body in the circumferential direction.