JPS5840787Y2 - Armature of rotating electrical machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to improvement of the armature of a rotating electric machine.

Generally, when lap winding or multiwave winding is used in the armature of a multi-pole DC machine, an unbalanced current flows through the brushes of the same polarity and sparks are generated, so to prevent this spark, each armature coil has an equal potential. Equal pressure lines are provided connecting the points.

Therefore, first, a conventional example having this pressure equalizing line will be explained.

In FIGS. 1 to 4, reference numeral 1 indicates an electric snoring shaft rotatably supported by a yoke (not shown), and 2 indicates a cylindrical shape fixed to the armature shaft 1 concentrically with the armature shaft 1. This is a laminated core having a plurality of grooves 2a parallel to the armature axis 1 along the outer periphery.

Reference numeral 3 denotes a commutator spider whose one end presses one end of the iron core 2 and is fitted onto the electric snoring shaft 1, -4 an insulating member fixed to the outer periphery of the commutator spider 3, and 5 a commutator surface 5a. and a plurality of commutator pieces each having a groove 5c in the riser part 5b at one end and insulated from each other by an insulating member 6, with a predetermined interval between one end and one end of the iron core 2. The commutator spider 3 is fixed to the commutator spider 3 via an insulating member 4.

7 is wound around the iron core 2 and is placed in a predetermined groove 2a of the iron core.
A plurality of armature coils are housed in a plurality of armature coils and both ends thereof are fitted into grooves 5a of each predetermined commutator piece 5 and connected to the commutator piece 5, and one end of the iron core 2 and the commutator piece A wedge 8 has a crossover wire portion 7a between it and one end of the armature coil 7. The wedge 8 is fitted into the wedge groove 2b of the groove 2a of the iron core 2, and fixes the armature coil 7.

Reference numeral 90 denotes a plurality of pressure equalizing wires having a rectangular cross section and disposed between the crossover wire portion 7a of the armature coil/1/7 and the commutator spider 3, and the short side, that is, the thin wall portion 9a. is formed to face the armature shaft 1, and connecting portions 9b and 9c at both ends are respectively fitted into grooves 5a of predetermined commutator pieces 5 and connected to the commutator pieces 5.

Note that the pressure equalizing line 90 has a nose portion 95 that is bent such that the short sides 9a of the negative half portion 9d and the other portion 9e become the inner periphery and the outer periphery, and the one half portion 9d and the other portion 9e are It is configured to have a step G between them.

Note that the first pressure equalization line 9 among the plurality of pressure equalization lines 90 is
One half 9d of the second pressure equalizing line 92 is placed above the other section 9e of the second pressure equalizing line 92, and one half of the third pressure equalizing line 93 is placed above the other section 9e of the second pressure equalizing line 92. By sequentially disposing the portion 9d, each of the pressure equalizing wires 91 is
The space occupied by 93 is made smaller.

Reference numeral 10 denotes an insulating member filled between the one-half portion 9d and the other part 9e of the pressure equalizing wire 90, and 11 a tightening member for tightening the pressure equalizing wire 90 to the commutator spider 3.

In this way, the armature of a conventional rotating electric machine is constructed so that the short side of the voltage equalizing wire faces the armature axis, so the length of the long side of the voltage equalizing wire is in the direction that increases the diameter of the armature. The disadvantage was that the external dimensions of the armature were large due to the pressure equalizing wires installed in the armature.

Furthermore, it is difficult to process the nose part of the pressure equalizing wire because it needs to be bent so that each short side becomes the inner and outer periphery.Moreover, in high-speed rotating machines, stress is applied to the inside of the nose part during operation of the rotating machine. The drawback was that the wires were concentrated, causing cracks that could lead to disconnection accidents.

This device has a rectangular cross section and is arranged between the crossover wire of the armature coil and the armature shaft, and is fixed to the armature shaft with a tightening member, and both ends are connected to respective commutator pieces. By providing a voltage equalizing wire whose long side, i.e., thick part, faces the armature axis in the entire area except for X, the external dimensions can be reduced, or the cross-sectional area of the armature coil can be increased with the same external dimensions. It is an object of the present invention to provide an armature for a rotating electric machine in which the mechanical strength of the nose portion of the pressure equalizing line is further improved.

The figures will be explained below.

FIG. 5 shows a pressure equalizing wire 90 used in this invention, which has a rectangular cross section like the conventional one and is disposed between the connecting wire portion 7a of the armature coil 7 and the commutator spider 3. has been done.

The pressure equalizing wire 90 in this invention is formed so that the long side, that is, the thick part 9g, faces the armature shaft 1 over the entire X area except for both ends, and both ends are formed so that the long side, that is, the thick part 9g faces the armature shaft 1, and both ends are opposite to each other as shown in FIG. The long sides 9g excluding both ends are twisted to form an angle of 3 to 90 degrees to form connecting portions 9b and 9c.

Incidentally, by bending the long sides 9g as the inner and outer peripheries as shown in FIG. 7, a step G is formed between the long sides 9g of the one-half section 9d and the other section 9e with the nose section 9f as the center.

The connecting portions 9b and 9c of the pressure equalizing wire 90 are formed by rolling the short sides 9a at both ends to form the grooves 5a of the commutator piece 5, as shown in FIG.
It can also be formed so that it can be inserted into.

Note that the structure other than the pressure equalizing line 90 is the same as the conventional one shown in FIGS. 1 and 2.

According to this invention, the cross-section is rectangular, the armature coil is arranged between the connecting wire part and the armature shaft, and is fixed to the armature shaft with a tightening member, and both ends are connected to a predetermined commutator piece. By providing a pressure equalizing wire formed such that the long side faces the armature axis over the entire X area except for both ends, the external dimensions can be reduced by the difference between the long side and the short side of the pressure equalizing wire. In addition, in order to form a step between one half of the pressure equalizing wire and the other part, each long side can be bent as the inner and outer periphery, so it is easy to process, and the nose part in particular has a smooth shape, making it easy to process electrical equipment. This has the effect of reducing the bending stress that appears in the nose portion when the child rotates, thereby preventing wire breakage accidents.

[Brief explanation of drawings]

Figures 1 and 2 show the armature of a conventional rotating electrical machine,
FIG. 1 shows a perspective view, and FIG. 2 shows a partial sectional view. Fig. 3 is a perspective view showing a conventional pressure equalizing line, Fig. 4 is an enlarged view of the section (■) in Fig. 3, Fig. 5 is a perspective view of a pressure equalizing line applied to an embodiment of this invention, and Fig. 6 is a perspective view showing a pressure equalizing line of the conventional one. The figures are an enlarged view of the section ■ in FIG. 5, FIG. 7 is an enlarged view of the section ■ in FIG. 5, and FIG. 8 is an enlarged view of the section ■ in FIG. 5 showing another embodiment. In the figure, 1 is an armature, 2 is an iron core, 5 is a commutator piece, 1 is an armature coil, and 90 is a pressure equalizing wire. Note that the same reference numerals in each figure represent the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] An armature shaft rotatably supported by a yoke - a cylindrical iron core fixed concentrically to the armature shaft;
A plurality of commutator pieces are fixed along the outer periphery of the armature shaft at predetermined intervals from one end of the iron core, and are wound around the iron core and have both ends between the one end of the iron core and the commutator pieces. A plurality of armature coils each having a crossover wire portion and each connected to a predetermined commutator piece, each having a rectangular cross section and disposed between the crossover wire portion of the armature coil and the armature shaft. It is fixed to the armature shaft by a tightening member, and both ends are connected to the respective predetermined commutator pieces, and the long side is formed so as to face the armature shaft in the entire area excluding both ends. An armature for a rotating electric machine, characterized in that it is provided with a plurality of pressure equalizing wires which are bent as inner and outer circumferences and have steps formed between one half and the other long sides centering on the nose section.