JP2001238410A - Brush holder for dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush holder, capable of automatic assembly and having high performance and at a low cost. SOLUTION: A terminal plate 1 is fixed to the lower part of a brush holder base 2 by caulking. A terminal plate 3, a spring 4 and a brush 6 are set at the upper part of the base 2. Furthermore, upper part of the base 2 is covered with a brush holder cover 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a brush holder device used for a rotating electric machine.

[0002]

2. Description of the Related Art FIGS. 11A and 11B show a conventional brush holder device for a rotating electric machine. FIG. 11A is a completed plan view showing a state where each part is assembled, and FIG. FIG. 3 is an exploded plan view. In the figure, 21 is a brush holder base, 22 is a brush, 23a is a metal brush holder,
23b is a plate, 24 is a pigtail, 25 is a terminal plate, and 26 is a spring.

The terminal plate 25 is formed by insert molding. After the plate 23b is placed on the brush holder base 21, the metal brush holder 23a is fixed by caulking. After assembling the metal brush holder 23a, the spring 26 is assembled in the metal brush holder 23a, and then the brush 22 is assembled. The welding position of the terminal plate 25 and the pigtail 24 is located beside the metal brush holder 23a.

[0004]

The brush holder device in the conventional rotary electric machine is configured as described above. Since the terminal plate is insert-molded into the resin brush holder device main body, the mold structure becomes complicated. Accordingly, there has been a problem that the dimensional accuracy of the terminal plate needs to be high, and the terminal plate is expensive, such as a structure that is not suitable for automatic assembly. Further, the pigtail welding position is located to the right or left of the brush, and there is a problem that the shape of the pigtail affects the sliding of the brush and affects the motor performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention eliminates the need for insert molding and enables automatic assembly, thereby facilitating assembly.
An inexpensive and high-performance brush holder device is provided.

That is, the brush holder type structure is simplified, the dimensional accuracy of the terminal plate is reduced, the variation in motor performance is reduced, parts are prevented from dropping during assembly, the assemblability of the brush holder cover is improved, and the brush holder device is assembled. This facilitates each.

[0007]

According to a first aspect of the present invention, there is provided a brush holder device for a rotating electric machine, wherein a first terminal plate is set at a lower portion of a brush holder base, and the first terminal plate is caulked and fixed to the brush holder base. The second terminal plate is inserted and installed in the holder base from above, the spring and the brush are set in the brush holder base, and the brush holder cover is placed on the brush holder base and installed.

According to a second aspect of the present invention, there is provided a brush holder device for a rotating electrical machine, wherein a spring is set on a temporary fixing step provided on a brush holder base.

According to a third aspect of the present invention, there is provided a brush holder device for a rotating electric machine, wherein a terminal plate and a pigtail of a brush are welded on a sliding shaft of the brush.

According to a fourth aspect of the present invention, there is provided a brush holder device for a rotating electric machine, wherein a first terminal plate and a second terminal plate are welded.

According to a fifth aspect of the present invention, there is provided a brush holder device for a rotating electric machine, wherein a positioning hole and a projection are provided on a brush holder base and a brush holder cover, respectively.

According to a sixth aspect of the present invention, there is provided a brush holder device for a rotating electric machine, wherein the brush holder cover has a line-symmetric structure.

According to a seventh aspect of the present invention, there is provided a brush holder device for a rotary electric machine, wherein a notch is provided in a brush holder base and a brush holder cover, and a rubber bush having a metal bush on an inner diameter is fitted into the notch. Thus, the brush holder base and the brush holder cover are assembled.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded plan view showing each part in a brush holder device for a rotating electric machine according to an embodiment of the present invention, FIG. 2 is an exploded side view thereof, FIG. 3 is a completed plan view showing a state where each part is assembled, and FIG. 5 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is a side cross-sectional view showing a brush holder base and a brush holder cover (a cross-sectional view taken along line BB in FIG. 3). In the drawing, 1 is a first terminal plate, 2 is a brush holder base, 3 is a second terminal plate, 4 is a spring, 5 is a temporary fixing step provided on the brush holder base 2, 6 is a brush, 7 Indicates a brush holder cover.
As shown in the figure, a terminal plate 1 (first terminal plate) is set under a brush holder base 2 made of a thermosetting resin such as phenol (FIG. 2),
The terminal plate 1 and the brush holder base 2 are fixed by caulking at seven locations of 1a to 1g and 2a to 2g of the brush holder base 2, respectively. FIG. 6 shows a caulking portion (C in FIG. 3)
FIG.

Next, a terminal plate 1 separate from the terminal plate 1 is provided.
The terminal plates 3 (second terminal plates) are inserted into the brush holder base 2 from above. Next, the spring 4 is set on the step portion 5 for temporary fixing from above. Next, the pigtail 6a of the brush 6 is welded to the terminal plate 1 and the terminal plate 3, and set from the upper part of the brush holder as shown in FIG. Thereafter, the terminal plate 1 and the terminal plate 3 are connected by welding at a D portion, and finally, a brush holder cover 7 made of a thermosetting resin such as phenol is set.

At this time, as shown in FIG. 5, the brush holder base 2 and the brush holder cover 7 are provided with a hole 8 and a projection 9, respectively, and the diameter of the projection 9 is made larger than the hole 8. When the press-fitting is performed, the brush holder cover 7 can be temporarily fixed. The actual fixing is performed by inserting a screw through the screw hole 10 of the brush holder base 2 and the brush holder cover 7 and fastening the brush holder device to the housing when the brush holder device is assembled to a housing (not shown).

In the brush holder device configured as described above, all components can be assembled in the motor axis direction, and automatic assembly is possible. That is, the components are sequentially stacked on the terminal plate 1. Further, since the brush holder base 2 and the terminal plate 1 are configured as separate bodies and are not insert-molded, the configuration of the brush holder base 2 can be simplified,
The dimensional accuracy of the terminal plate 1 can also be reduced.

As shown in the figure, when the motor is composed of four brushes, the brushes facing each other have the same polarity, so that it is generally necessary to divide the terminal plate into two. In this embodiment, the terminal plate 3 is assembled from the upper part of the brush holder base 2 and welded to the terminal plate 1 and the D portion. With this structure, as shown in FIG.
The welding of a can be performed coaxially with the sliding axis E of the brush 6, and the pigtail 6a can be led out in the motor axial direction.

As a result, the state of the pigtail 6a becomes the same shape for the four brushes 6, and the sound and performance are stabilized. Further, as shown in FIG. 1, since the brush holder cover 7 has a line-symmetric structure, it is not necessary to consider the direction at the time of assembling, so that the assembling property is stabilized.

With the above structure, the following effects can be obtained. That is, by caulking and fixing the terminal plate 1 to the brush holder base 2, the mold configuration of the brush holder base 2 can be simplified, and the dimensional accuracy of the terminal plate 1 can be reduced. it can. Further, since the pigtail 6a welded portion F of the terminal plates 1 and 3 is located on the same axis as the brush sliding shaft E, the pigtail 6a
It is possible to reduce adverse effects such as variation of each brush on sliding of the brush 6 due to variation of the shape of “a”, and reduce variation in motor performance.

Further, by providing a hole 8 in the brush holder base 2 and a protrusion 9 having a diameter larger than the hole diameter in the brush holder cover 7, the brush holder base 2 and the brush holder cover 7 can be press-fitted temporarily and the spring can be fixed. 4 and the brush 6 can be prevented from falling off. Note that a protrusion may be provided on the brush holder base 2 and a hole may be provided on the brush holder cover 7.

Further, since the brush holder cover 7 has a structure symmetrical with respect to the motor shaft plane, the brush holder cover 7 has no directivity and is easy to assemble. Furthermore, brush holder base 2
The provision of the step portion 5 allows the spring 6 to be temporarily fixed, so that there is an advantage that it is easy to assemble.

As described above, since all parts are assembled from the motor axis direction, automatic assembling is enabled, improvement in assembling property, improvement in brush sliding property, reduction in motor performance variation, and brush holder base are achieved. It is possible to simplify the mold, reduce the dimensional accuracy of the terminal plate, prevent the spring and the brush from dropping off, and realize automatic assembly of the brush holder device.

Embodiment 2 FIG. 7 and 8 are plan views showing a brush holder device for a rotary electric machine according to Embodiment 2 of the present invention. FIG. 7 shows a state before a rubber bush having a metal bush on an inner diameter is fitted, and FIG. The subsequent states are shown. 9 is a plan view showing the brush holder cover, and FIG. 10 is a sectional view taken along line GG of FIG. In the first embodiment, the case where the brush holder base 2 and the brush holder cover 7 are fastened with the screw 10 is shown. In the present embodiment, the notch 11 is provided in the screw fastening portion.

The brush holder base 2 and the brush holder cover 7 are assembled by inserting a rubber bush 12 having a metal bush inside the notch 11 into the notch portion 11, thereby assembling the brush holder base 2 and the brush holder cover 7.
Can be rubber-mounted on the housing to reduce brush noise. The other configuration is the same as that of the first embodiment.

With the above configuration, when the screw fastening portion of the brush holder device is rubber-mounted, the brush holder base 2 and the brush holder cover 7 can be simultaneously rubber-mounted, and the brush holder base 2 and the brush holder cover 7 can be mounted together. It is securely held. In the first and second embodiments, an example of four brushes has been described. However, the number of brushes is not limited to four.

[0027]

According to the brush holder device of the rotating electric machine according to the first aspect of the present invention, the first terminal plate is set at the lower portion of the brush holder base, fixed by caulking, and the first terminal plate is fixed to the brush holder base from the upper portion. 2, the terminal plate is inserted and installed, the spring and the brush are set on the brush holder base, and the brush holder cover is placed on top of the brush holder base, so that the configuration of the brush holder can be simplified and the terminal can be simplified. The dimensional accuracy of the plate can be reduced.

According to the brush holder device of the rotary electric machine according to the second aspect of the present invention, the spring is set on the temporary fixing step provided on the brush holder base, so that the assemblability can be improved.

According to the brush holder device of the rotating electric machine according to the third aspect of the present invention, since the pigtail of the brush is welded to the terminal plate and the brush on the sliding shaft of the brush, the adverse effect on the brush sliding by the pigtail is reduced. it can.

According to the brush holder device of the rotating electric machine according to the fourth aspect of the present invention, the first terminal plate and the second terminal plate are welded, so that the assemblability can be improved.

According to the brush holder device of the rotating electric machine according to the fifth aspect of the present invention, since the positioning holes and the projections are provided in the brush holder base and the brush holder cover, both can be temporarily press-fitted. .

According to the brush holder device of the rotating electric machine according to the sixth aspect of the present invention, the brush holder cover has a line-symmetrical structure, so that there is no directionality and therefore the assembling property is improved.

According to the brush holder device of the rotary electric machine according to claim 7 of the present invention, a cutout portion is provided in the brush holder base and the brush holder cover, and the cutout portion is provided with a rubber bush having a metal bush on an inner diameter. Since the brush holder base and the brush holder cover are assembled by fitting, both can be reliably held.

[Brief description of the drawings]

FIG. 1 is an exploded plan view showing a brush holder device according to Embodiment 1 of the present invention.

FIG. 2 is an exploded side view showing the brush holder device according to the first embodiment of the present invention.

FIG. 3 is a plan view showing the brush holder device according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is an enlarged plan view of a portion C in FIG. 3;

FIG. 7 is a plan view showing a brush holder device according to a second embodiment of the present invention.

FIG. 8 is a plan view showing a brush holder device according to a second embodiment of the present invention.

FIG. 9 is a plan view showing a brush holder cover.

FIG. 10 is a sectional view taken along line GG in FIG.

FIG. 11 is a completed plan view showing a conventional brush holder device.
(a) and a partially exploded plan view (b).

[Explanation of symbols]

1,3 terminal plate, 2 brush holder base, 4 spring, 5 step for temporary fixing, 6 brush, 6
a pigtail, 7 brush holder cover, 8 holes, 9
Protrusion, 11 cutout, 12 rubber bush.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kyohei Yamamoto 2-6-1 Otemachi, Chiyoda-ku, Tokyo Within Mitsubishi Electric Engineering Co., Ltd. (72) Inventor Kazuhisa Takashima 2-6-Otemachi, Chiyoda-ku, Tokyo No. 2 Mitsubishi Electric Engineering Co., Ltd. F-term (reference) 5H605 AA07 AA08 CC03 CC07 EA23 FF06 FF08 GG18 5H613 AA01 AA02 BB15 BB26 BB38 GA12 GA15 GB17 GB18 KK03

Claims (7)

[Claims] 1. A first terminal plate is set at a lower portion of a brush holder base, and caulked and fixed.
A second terminal plate is inserted and installed in the brush holder base from above, a spring and a brush are set in the brush holder base, and a brush holder cover is placed over the brush holder base and installed. Rotating electric machine brush holder device. 2. The brush holder device for a rotating electric machine according to claim 1, wherein the spring is set on a temporary fixing step provided on the brush holder base. 3. The brush holder device for a rotating electric machine according to claim 1, wherein the terminal plate and the pigtail of the brush are welded on a sliding shaft of the brush. 4. The brush holder device for a rotary electric machine according to claim 1, wherein the first terminal plate and the second terminal plate are welded. 5. The brush holder device for a rotating electric machine according to claim 1, wherein positioning holes and projections are provided on the brush holder base and the brush holder cover, respectively. 6. The brush holder cover according to claim 1, wherein the brush holder cover has a line-symmetric structure.
A brush holder device for a rotating electric machine according to item 13. 7. The brush holder base and the brush holder cover are assembled by providing a notch in the brush holder base and the brush holder cover, and fitting a rubber bush having a metal bush in an inner diameter into the notch. 7. Any one of claims 1 to 6, characterized in that:
A brush holder device for a rotating electric machine according to item 13.