JPS609418B2 - Armature of rotating electrical machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotating armature using flat coils.

First, the armature of a conventional rotating electric machine will be explained with reference to FIGS. 1 to 3.

FIG. 1 is a diagram showing the hair portion of a conventional armature, where 1 is a shaft, 2 is an armature core that is press-fitted into this shaft and has a slot on its outer periphery, 3 is a commutator that is also press-fitted into the shaft 1, 30 is a segment which is a conductive part of this commutator,
3A is a riser portion of the segment to which the armature coil is connected, and 3B is a groove for connecting the armature coil provided in the riser portion 3A. 4 and 5 are armature coils wound in the slots of the armature core 2, 4A is a lower outlet of this armature coil 4, and 5B is an upper outlet of the other armature coil 5. As shown in FIGS. 2 and 3, these are inserted into the grooves 3B provided in the riser section 3A and connected by brazing, welding, or other methods.

FIG. 2 is a sectional view taken along the Rollo line in FIG. 1, and 6 is a molded resin annular body constituting the commutator 3.

FIG. 3 is a sectional view taken along line mm in FIG. 1.

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 outlet part 4A of the armature coil 4 inserted into the armature coil 2 is connected to the first As shown in the figure, the upper exit part 5B of another armature coil 5 is twisted in the opposite direction by the same angle, and these are twisted in the same riser groove. 38 and fixed by caulking, brazing, welding, or other methods.

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 outlet parts 4A, 5B of 5 and the riser part 3A, it is necessary to process a groove 3B in this part. 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 drawbacks of the conventional ones as described above, and an object thereof is to provide an excellent armature for a rotating electric machine as described below.

An embodiment of the present invention shown in FIGS. 4 to 11 will be described below.

In each figure, 41A is the lower outlet of the armature coil 4, which is an axial extension of the mouth part which is the outlet conductor of the armature coil 4, and 51B is the upper outlet of the armature coil 5. Department, 40
6a is a segment part which is a conductive part of the commutator obtained by twisting the lower outlet part 41A by 900 degrees, and 6a is a segment part provided on the outer periphery of the resin annular body 6, The groove 7 into which the mouth-side outlet part 41A is press-fitted is the above-mentioned segment. 8 is a tip of an ultrasonic press-fitting device, 9 is an ultrasonic welding device, 10 is a power source for this device, 11 is a coil energized by this power source, 1
2 is a magnetostrictive vibrator that generates ultrasonic vibration by energizing this coil; 13 is a horn that increases the vibration of this vibrator; 1
4 is a chip connected to this horn and presses the upper side outlet part 51B of the armature coil 5 to ultrasonically weld the respective outlet parts 41A, 518; 15 is the upper side outlet of the coil 5; An insulating resin material which is powdery at room temperature and is made of epoxy resin or the like is filled in the outer peripheral part of the part 51B and the gap between the outlet part 51B and the outer peripheral part of the commutator.

Next, a method for manufacturing the armature of this embodiment will be explained.

The lower outlet part 41A of the armature coil 4 is connected to the armature coil 5.
It is set longer than the upper mouth side outlet part 51B. In addition, grooves 6a are formed in the outer peripheral portion of the resin annular body 6 of the commutator, into which the lower outlet portion 41A is press-fitted. Then, only the lower outlet part 41A is twisted by a predetermined length 900 degrees from the tip to form the segment part 40 of the commutator. Next, this segment portion 40 is press-fitted and fixed into the groove 6a of the resin annular body 6 by ultrasonic press-fitting. In this ultrasonic press-fitting process, as shown in FIG. 7, ultrasonic waves in the direction of the flea are applied to the tip 8 of the ultrasonic press-fitting device, and due to this ultrasonic vibration, the segment portion 40 is moved into the groove 6a in a short time. It is press-fitted and fixed. After that, the outlet part 51B is twisted in the circumferential direction as in the conventional case,
It is held in position on the segment part 40. Thereafter, the outlet portion 51B and the segment portion 40 are welded and integrated using the ultrasonic welding device 9.

(This welding process is shown in FIGS. 8 and 9.) After this, epoxy resin 15 is filled and fixed on the outer periphery of the commutator excluding the segment portion 40 of the commutator and on the outer periphery of the upper outlet portion 51B. . That is, in this embodiment, the lower outlet part 41A of the armature coil 4 is extended, and this extended part is press-fitted and fixed to the outer peripheral part of the resin annular body 6 to serve as a saddle part with the power supply brush 7. Therefore, commutator segments are not required, so
Manufacturing the commutator becomes extremely easy. Also, the lower exit side outlet 4
The resin annular body 6 can be fixed to the groove 6a at the extension part 1A in a short time by ultrasonic press-fitting, and the connection between the lower outlet part 41A and the upper outlet part 51B is By ultrasonic welding, it is possible to provide a highly productive armature that is strong and can be performed in a short time. Furthermore, in the above embodiment, the outer periphery of each square protrusion 41A, 518 and the outer circumference excluding the commutator segment part are filled and fixed with epoxy resin 15, so that the insulation of each square protrusion 41A, 51B is The mechanical strength associated with the rotation of the armature as well as the mechanical strength can be set sufficiently high.

In the above description, the lower outlet part 41A of the armature coil 4 is fixed to the resin annular body 6 by ultrasonic press-fitting, but of course it may be fixed by other means.

As described above, in the present invention, a pair of flat lead conductor parts of the armature coil are arranged so as to be substantially orthogonal to each other and connected by ultrasonic welding, and the inner lead conductor parts to be connected are connected by ultrasonic welding. It is fixed to the outer periphery of the resin annular body of the commutator, and the outer periphery of the outlet conductor part is made into a conductive part on which the power supply brush can slide, which eliminates the need for an expensive commutator that was previously prepared separately. Not only does this eliminate the need for segments, but it also eliminates the work of connecting the outlet of the armature coil and the segments of the commutator, which required particularly careful work. The work of fixing the inner lead conductor part to the outer peripheral surface of the resin annular body of the commutator and the ultrasonic welding work between the pair of lead conductor parts can be performed extremely easily in a short time, making it possible to achieve low cost and high reliability. A high quality rotating electric machine armature can be obtained.

Further, since the insulating resin body is fixed to the outer periphery of the output conductor portion, there is an advantage that each output conductor portion has sufficient insulation properties and mechanical strength.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the main parts of a conventional armature, Fig. 2 is a sectional view taken along the line N in Fig. 1, Fig. 3 is a sectional view taken along the mm-m line in Fig. FIG. 5 is a front view showing the main parts of the armature in one embodiment of the invention, FIG. 5 is a sectional view taken along the line V-V in FIG.
The figure is a sectional view taken along the line W- in Fig. 4, Fig. 7 is a sectional view showing the ultrasonic press-fitting process in the embodiment shown in Fig. 4, and Figs. 8 and 9 are sectional views in the embodiment shown in Fig. 4. A cross-sectional view showing the ultrasonic welding process, FIG. 10 is a cross-sectional view showing the armature after filling and fixing the insulating resin in the embodiment shown in FIG. 4, and FIG. 11 is a phantom-X-ray cross-sectional view of FIG. It is. In the figure, 1 is a shaft, 2 is an armature core, 3 is a commutator, 3 river segments, 3A is a riser part, 3B is a groove, 4
40 is the armature coil, 40 is the segment portion, 4A is the lower outlet of the armature coil, 5 is the armature coil, 5B is the upper outlet of the armature coil, 6 is the resin annular body, 6a is the groove, 7
8 is a power supply brush, 8 is a tip of an ultrasonic press-fitting device, 9 is an ultrasonic welding device, and 15 is an insulating resin body. Note that the same reference numerals in each figure indicate the same or corresponding parts. 1st
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] 1. A shaft of a rotating electrical machine, an armature core fixed to the shaft and having a slot on its outer periphery, armature coils wound around each of the slots of this core, and an outlet portion of the armature coil so as to be substantially orthogonal to each other. A pair of flat lead-out conductor parts are arranged and connected by ultrasonic welding, and the inside side extends in the axial direction from the outside side; A commutator formed of a resin annular body to which the inner outlet conductor portion is fixed, and a conductive portion on which a power feeding brush can come into sliding contact with the outer peripheral surface of the inner outlet conductor portion; A rotor for a rotating electric machine, comprising an insulating resin body filled and fixed between an outer circumferential portion of a conductor portion and the outlet conductor portion and an outer circumferential portion of a commutator excluding the conductive portion.