JPS5845499Y2 - Armature of rotating electrical machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an armature for a rotating electrical machine using a flat conductor.

The armature of a conventional rotating electrical machine will be explained with reference to FIGS. 1 to 4.

In the figure, 1 is a shaft, 2 is press-fitted into this shaft 1,
3 is a commutator which is also press-fitted into the shaft 1; 30 is a segment which is a conductive part of this commutator; 3A is a riser part of the segment to which the armature coil is connected; 3B is a riser part of the segment that connects the armature coil; This is a groove for connecting an armature coil provided in this riser portion 3A.

4゜5 is an armature coil wound around the slot of the armature core 2, 4A is a sunrise portion on the lower side of the armature coil 4,
5B is the upper opening side sunrise part of the upper armature coil 5, and these are shown in FIG. As shown in FIG. 3, it is inserted into the groove 3B provided in the riser portion 3A and connected by brazing, welding, or the like.

FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1, and 6 is a molded resin annular body forming the commutator 3. In FIG.

FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 1, and FIG. 4 is a wiring diagram of the armature.

As is well known in this conventional armature structure, the commutator 3 manufactured in a separate process is press-fitted into the shaft 1, and the lower opening portion 4A of the armature coil 4 inserted into the armature coil 2 is connected to the first As shown in the figure, the upper armature coil 5 is twisted in the circumferential direction by a predetermined angle, and then the upper opening side sunrise portion 5B of another armature coil 5 is twisted in the opposite direction by the same angle, and these are placed in the groove of the same riser. It was inserted into 3B and fixed by caulking, brazing, welding, etc.

In this conventional method, the commutator 3 is manufactured in dozens of steps, so it is expensive, and the armature coil 4,
When connecting the opening portions 4A, 5B of 5 and the riser portion 3A, it is necessary to form a groove 3B in this portion, and also to prevent the exposed portions 4A, 5B from moving from the groove 3B during brazing or welding. There were drawbacks such as the need to swage the parts in advance, and particularly careful work was required to withstand centrifugal force, high temperatures, vibrations, etc. during use.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and the pair of sunrise conductor portions of the armature coil are arranged so as to be substantially perpendicular to each other.

Conventionally, by forming the conductive part of the commutator by fixing the orthogonal outer conductor parts to the outer circumferential part of the resin annular body along the outer circumferential surface of the resin annular body provided in the commutator, This eliminates the need for the conductive part of the commutator that was previously manufactured, and eliminates the work required to connect the armature coil and the conductive part of the commutator, which previously required careful work. The purpose is to provide armatures.

An embodiment of this invention will be described below with reference to the drawings.

FIG. 5 is a diagram showing the main parts of the present invention, in which 41A is the lower end side sunrise part of the armature coil 4 which is an axial extension of the sunrise part which is the exposed conductor part of the armature coil 4, and 51B is the sunrise part on the lower side of the armature coil 4. This is an upper opening side protrusion of another armature coil 5 which is an axial extension of the sunrise part which is the sunrise conductor part of the child coil 5.

51B-A is a segment which is a conductive part of a commutator obtained by twisting the upper opening side opening part 51B by 90 degrees.

Figure 6 is a cross-sectional view taken along line VI-VI in Figure 5, Figure 7 is a cross-sectional view taken along line ■-■ in Figure 5, and 6.7 is a resin ring made of insulating resin. The resin annular body γ is formed into a ring shape.

In the armature of the present invention, only the upper sunrise part 51B is rotated by a predetermined length 9 o'a from the tip to form a conductive part 51B-A of the commutator.

After that, the sunrise portions 41A and 51B are twisted in the circumferential direction as in the conventional product.

In this state, the conductive portion 51B-A of the commutator and the lower sunrise portion 41A face each other at a substantially right angle, but the distance between the conductive portions 51B-A of adjacent commutators as shown in FIG. These protrusions are vertically shaped parallel to the center line of the shaft and directed toward the center of the shaft so that they have a predetermined dimension. The mouth side sunrise part 41A is integrated by a method such as ultrasonic welding.

In this state, as can be seen from its cross-sectional shape, it has an extremely rational shape that is reinforced against centrifugal force during rotation.

button, in this case, the centrifugal force during rotation causes the conductive part 5 of the commutator to
To prevent 1B-A from floating up.

As shown in FIG. 7, the lower sunrise portion 41A is made longer than the upper sunrise portion 51B.

That is, by doing this, the engagement surface with the resin annular body 6 in the lower opening side sunrise part 41A becomes thicker, so that the mooring effect of the lower mouth side sunrise part 41A with the resin annular body 6 becomes a dog. The centrifugal force resistance of the upper opening side sunrise part 51B, which is fixed integrally with the lower mouth side sunrise part 41A, can be improved.

Next is heat resistance, which we prepared separately. A resin annular body 6 and a ring-shaped resin annular body 7 are attached to the shaft 1, and are made of a resin such as asbestos phenol or glass phenol that has excellent mechanical strength, and have a groove in the outer periphery for accommodating the lower opening side sunrise part 41A. By press-fitting from the shaft end side, the commutator is completed.

In addition, although the case where the resin annular body 6.7 prepared in advance is press-fitted into the shaft 1 has been described above, the same thing can be obtained even if it is integrally molded with the shaft 1 without relying on press-fitting. do not have.

As described above, this invention consists of arranging a pair of flattened conductors in the armature coil so that they are substantially perpendicular to each other, and so that the orthogonal outer conductor parts are arranged along the outer peripheral surface of the resin annular body. Since it is fixed to the outer periphery of the annular body to form the conductive part of the commutator, it not only eliminates the need for expensive commutator segments that were previously prepared separately, but also eliminates the need for particularly elaborate work. The required connection work between the armature conductor portion of the armature coil and the commutator segment can be eliminated, and there is an advantage that a highly reliable armature for a rotating electric machine can be obtained at low cost.

[Brief explanation of the drawing]

Figure 1 is a front view showing the main parts of a conventional armature, Figure 2 is a sectional view taken along line ■-■ in Figure 1, and Figure 3 is a cross-sectional view taken along line ■-■ in Figure 1. FIG. FIG. 4 is a wiring diagram of a conventional armature. Figure 5 is a front view showing the main parts of the armature of the present invention;
The figure is a sectional view taken along the line VI--VI in FIG. 5, and FIG. 7 is a sectional view taken along the line ■--■ in FIG. 5. In the figure, 1 is a shaft, 2 is an armature core, 3 is a commutator, 3A is a riser part, 3B is a connection groove provided in the riser part,
30 is a segment, 4 and 5 are armature coils, and 4A is a sunrise portion on the lower side of the armature coil. 5B is an upper side sunrise part of another armature coil, 5113A is a conductive part of a commutator formed by the above-mentioned 5B, and 6 is a resin annular shape having a groove in its outer circumferential part to accommodate the lower side sunrise part 4A. The body T is a ring-shaped resin annular body for fixing the conductive portion 51B-A of the commutator. The same reference numerals in each figure indicate the same parts.

Claims (1)

[Scope of utility model registration request] A shaft of a rotating electric machine, an armature core fixed to the shaft and having a slot on its outer periphery, an armature coil wound around each slot of the core and each having a pair of flat sunrise conductor parts corresponding to the slots; and a commutator that is fixed to the shaft and has a conductive part that is connected to each of the outlet conductor parts and in which a power supply brush can come into sliding contact, and a resin annular body that is integrally fixed to the conductive part. write,
The pair of flat sunrise conductor parts are arranged to be substantially orthogonal to each other, and the outer sunrise conductor parts of the orthogonal sides are fixed to the outer peripheral part of the resin annular body along the outer peripheral surface of the resin annular body. An armature for a rotating electric machine, characterized in that the above-mentioned conductive portion is formed.