JPS6325896Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a brush holding device for a relatively low-voltage DC rotating electric machine installed in, for example, an automobile.

Conventionally, this type of apparatus has been shown in FIGS. 1 to 5. In FIG. 1, reference numeral 1 denotes a commutator of a rotating armature, which is connected to an outlet of an armature winding (not shown). 2 is a plurality of brushes that come into sliding contact with the commutator 1; 3 is a brush holder that holds the brushes 2; this is formed by bending a metal plate as shown in the second figure; is held slidably in one direction of the commutator. Further, riveted portions 3b are formed on both sides of the recessed portion 3a, and an upright portion 3c is formed on one riveted portion 3b. Reference numeral 4 denotes an insulating plate made of a phenol plate or the like that holds only the brush 2 on the positive side of the brush holder 3, and 5 is a holding plate that firmly holds the brush holder 3, as shown in the third figure. A screw hole 5a, a through hole 5b for passing the rivet, and a rivet head relief hole 5c are drilled as shown in the figure. Reference numeral 6 denotes a brush spring, in which a winding start part 6a is engaged with the upright part 3c of the brush holder 3, and a winding end part 6b is connected to the head part 2a of the brush 2.
The brush 2 is brought into sliding contact with the commutator 1 under a predetermined pressure. 7 is a rivet.

Next, the mounting operation of the above-mentioned conventional device will be explained. As shown in FIG. 4 (-cross-sectional view of FIG. 1) of the brush retainer 3 on the minus side, the riveted portion 3b is riveted to the mounting surface of the retaining plate 5 by two rivets 7. It is worn. On the other hand, the one on the positive side of the brush holder 3 is fixed to the insulating plate 4 by riveting or caulking with two rivets 7, as shown in FIG. , is riveted to the mounting surface of the holding plate 5 by two other rivets 7a. The entire device is fixed to an end cover of a rotating electric machine (not shown) using a screw hole 5a.

Since the conventional brush holder for DC rotating electric machines is constructed as described above, the structure is complicated, there is a lot of crimping work, and wide riveted portions 3b are formed on both sides of the brush holder 3. As a result, the adjacent space between the positive side and the negative side of the brush holder 3 becomes narrow, which is an obstacle to downsizing the rotating electric machine.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it reduces the space required for the caulking part when fixing the brush holder to the plate that holds it, thereby making the work easier. It is an object of the present invention to provide a brush holding device for a DC rotating electric machine that can be simplified, has a simple structure, and is further downsized.

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

In the figures, the same parts as in FIGS. 1 to 5 are indicated by the same reference numerals.
The brush holder according to this invention is made by bending a metal plate, as shown in FIG. A protrusion 8d that engages with an engagement hole 10b of a holding plate 10 and an engagement hole 9a of an insulating plate 9, which will be described later, is formed at one end of the recess 8a. A riveted portion 8b is formed at the end to be riveted to either the mounting surface of the holding plate 10 or the insulating plate 9, which will be described later. 8c, 8
e are a standing portion and a rivet hole, respectively. 9 is an insulating plate made of the same material as the conventional one,
As shown in FIG. 8, an engagement hole 9a that engages with the protrusion 8d and a notch 9b for plate engagement are provided at one end. Reference numeral 10 denotes a holding plate, which, as shown in FIG. 9, has a screw hole 10a similar to the conventional one and an engagement hole 10 that engages with a protrusion 8d.
b. In addition to the rivet head relief hole 10c, a relief hole 10d for the projection 8d and a raised portion 10e that engages with the cutout portion 9b of the insulating plate 9 are formed.

Next, the assembly operation of this invention will be explained.

As shown in FIG. 10 (X-X sectional view in FIG. 6), the brush holder 8 on the negative side has a protrusion 8d provided at one end of the recess 8a that is connected to the engagement hole of the holding plate 10. 10b, and the riveted portion 8b is directly fixed to the mounting surface of the holding plate 10 by the rivet 7. Further, as shown in FIG. 11 (XI-XI sectional view in FIG. 6), the positive side brush holder 8 is assembled by inserting the protrusion 8d into the engagement hole 9a of the insulating plate 9 and caulking with the rivet 7. After fixing, the insulating plate 9 is further fixed to the holding plate 10 by caulking with the rivets 7. At this time, the raised portion 10e of the holding plate 10 is adapted to engage with the cutout portion 9b of the insulating plate 9, so that the positioning of the insulating plate 9 can be easily performed. Then, with the cut-and-raised portion 10e and the cut-out portion 9b engaged, the end of the insulating plate 9 opposite to this engaging portion is crimped and fixed with the rivet 7, and then the cut-and-raised portion is fixed. The engagement between 10e and notch 9b is strong. Therefore, in reality, 7 rivets are 1
Even though only books are used, the insulating plate 9 can be attached to the holding plate 10 with the same reliability as the conventional example in which two rivets 7 are used.

Note that, without being limited to the above embodiment, for example, the engagement hole 1 that engages with the protrusion 8d of the brush holder 8
0b may be a square hole or the like, and the brush holder 8 may be riveted by other methods such as caulking with an eyelet.

As described above, according to this invention, a protrusion that engages with each engagement hole of the holding plate or the insulating plate is formed at one end of the recess of the brush holder, and at the other end of the recess. a riveted part to be riveted to either the mounting surface of the holding plate or the insulating plate; further, one end of the insulating plate is riveted to the mounting surface of the holding plate; Since the cut and raised portion for engaging and holding the holding plate is formed on the mounting surface of the holding plate, it is possible to improve work efficiency and simplify the structure. and,
The brush holder of this invention differs from conventional ones in that the riveted part is formed only on one side of the recess. This has the effect of increasing the space and making it possible to further downsize.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional brush holding device for DC rotating electric machines, Fig. 2 is a perspective view of the brush holder used in Fig. 1, and Fig. 3 is a holding plate used in Fig. 1. 4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a sectional view taken along the - line in FIG. 1, and FIG. 6 is a brush for a DC rotating electric machine according to an embodiment of this invention. a plan view showing a holding device;
Figure 7 is a perspective view of the brush holder used in Figure 6, Figure 8 is a perspective view of the insulating plate used in Figure 6, and Figure 9 is the holder used in Figure 6. A plan view of the plate, FIG. 10 is a sectional view taken along line XX in FIG. 6, and FIG. 11 is a sectional view taken along line XI-XI in FIG. 6. 1 is a commutator, 2 is a brush, 8 is a brush holder,
8a is a recessed part, 8b is a riveted part, 8d is a protrusion, 9 is an insulating plate, 9a is an engagement hole, 10 is a holding plate, 1
0b is an engagement hole, and 10e is a cut and raised portion. In addition,
In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] a holding plate into which a rotating commutator is fitted; and a plurality of brush holders which are attached to the mounting surface of the holding plate at predetermined intervals and hold a plurality of brushes that slide into contact with the commutator within bent recesses. and an insulating plate interposed between a brush holder that holds one of the positive or negative brushes of the plurality of brush holders and the mounting surface of the holding plate. A brush holding device for a rotating electric machine includes: a protrusion formed at one end of a recess of the brush holder and engaging with an engagement hole formed in the holding plate or the insulating plate; and a recess of the brush holder. a riveted portion formed on the other end of the retaining plate and riveted to either the mounting surface of the retaining plate or the insulating plate; A brush holding device for a DC rotating electrical machine, comprising a cut-and-raised portion that engages and holds the other end of the insulating plate to which the end of the insulating plate is riveted.