JPS5932195Y2 - brush holder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holder for a carbon brush that is disposed in contact with a commutator of an armature.

In the brush holder, band-shaped metal plates made by pressing concave parts in the longitudinal direction are bent from the center and stacked on top of each other.
Brush holder pockets are known, but in conventional holders of this type, after bending a metal plate and fixing the seam by spot welding or caulking, the motor Since the holder was to be assembled into a case or the like, the productivity of the holder itself and the workability of assembling it into the motor were not necessarily good.

Therefore, the present invention provides a brush holder that can be simply and easily assembled into a motor with high accuracy by simply bending a metal plate.

The drawings showing the embodiments of the present invention will be described in detail below.
In Fig. 1, a metal plate 1 constituting the holder is shaped like a band and has a concave part 2 for forming a brush holder pocket formed in the longitudinal direction by press working, and a roughly H-shaped part in the width direction in the central part. A notch is provided, and slits 4, 4 are provided in the rib portions 6, 6 on the outside thereof in the longitudinal direction on both left and right sides, and terminal forming pieces 5, 5 are left on the outside.

According to the present invention, as shown in FIG. 2, rib portions 6, 6 along the concave portion 2 are arranged outwardly in parallel on both left and right edges so as to form an abbreviated shape from the front. Part 6, 6
A plurality of paired notch recesses 7, 7'...
- is provided in a planar approximately semicircular shape.

That is, the metal plate 1 is separated from the notch 3 into the first half 1a and the second half 1b.
When partitioning into two rib parts 6, 6, the above-mentioned notch recess 7. γ... are provided at symmetrical positions in the front half 1a and the rear half 1b, so that when the metal plate 1 is bent from the center, the cutout recess 7 in the front half and the cutout recess 7' in the rear half match. Please set the position as shown below.

The metal plate 1 is then bent from the center along the line X-X in FIG.
It is bent in the direction of the arrow as shown, and then bent at the center along line X--X to form the shape shown in FIG. 3B.

Note that the bending may be done in the reverse order of the above-mentioned order.

As shown in Figure 3B, the side surface is approximately U-shaped, and the front half 1a
and the rear half 1b are overlapped and the rib parts 6, 6 are joined together.

The pair of cutout recesses 7, 7', . . . are made to coincide with each other, and a brush holder itself (a) is formed inside as shown in FIG.

Note that a connector (not shown) is connected to the round hole at the tip of the terminal forming piece.

The brush holder itself is formed in this way and a brush (not shown) is installed inside the brush holder itself.
Since the first half 1a and the second half 1b are not fixed, the brush cannot be held.

Accordingly, as shown in FIG. When assembling the motor case cover 9 to the motor case 8 by fitting it.

Said notch recess 7. γ is engaged with the projection 10 to form the rib portion 6.
, 6 are sandwiched between the joining parts 8a and 9a, and both rib parts 6,
6 is crimped to hold the brush in the brush holder pocket a, and the holder itself is integrated with the motor case 8 and the motor case cover 9.

At this time, the terminal forming piece 5' is formed so as to be located not in the joined portion of the motor case 8 and the motor case cover 9, but in the space between the case and the cover.

(not shown) Therefore, the plurality of notch recesses 7 forming the above-mentioned pair
, 7' are of course provided at preset positions so as to match the projections 10.

As explained above, according to the brush holder according to the present invention, when the metal plate 1 having the recess 2 in the longitudinal direction is bent from the center and abutted against each other by the rib parts 6, 6,
When assembling the motor case 8 and the motor case cover 9 by fitting the protrusions 10 and the fitting holes 11 opposite to the joint parts 8a and 9a, the notch recesses 7 and 7' are engaged with the protrusions 10. The brush holder itself is fixed by fitting and positioning, and the rib parts 6, 6 are crimped to the joint parts 8, 9 to fix them together, so there is no need to fix the brush holder itself by spot welding or caulking as in conventional examples. After assembling the means, the motor case, and the motor case cover, the work of assembling the brush holder in their proper positions can be omitted, and the brush holder itself can be manufactured simply and easily at low cost.
It can be easily assembled at the same time as the motor case cover 9 is assembled to the motor case 8, and the protrusions 10
This can be done with high accuracy by engaging the notch recesses 7, 7' in the rims, and the rib portions 6, 6 which overlap each other are formed by the joining portions 8a, 9a of the motor case 8 and the motor case cover 9. Since it is crimped, it not only has an excellent brush holding effect, but also has practical effects such as being able to be firmly integrated with a motor case and the like.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the unfolded state of the metal plate constituting the brush holder according to the present invention, Fig. 2 is a YY sectional view of Fig. 1, and Fig. 3A is the metal plate of Fig. 1. A side view showing one state of the bending process along X-X, FIG. 3B is a side view of the brush holder formed after the metal plate has been bent;
FIG. 4 is a cross-sectional view showing the installed state of the brush holder together with the motor case and motor case cover. 1...metal plate, 2...-recessed part, 6...-rib part, 7,
7'... Paired notch recesses, 8... Motor case,
9...Motor case cover 10...Protrusion, a...
- Brush holder pocket.

Claims (1)

[Scope of utility model registration request] It has a band shape, and has a concave portion 2 for forming a brush holder pocket in the longitudinal direction, rib portions 6°6 on both side edges thereof, a cutout portion 3 in the width direction in the center, and slits 4, 4 in the longitudinal direction on both left and right sides thereof. The brush holder pocket a is formed by bending a metal plate 1 from the center with terminal forming pieces 5, 5 remaining on the outside thereof, which are attached to each other when folded and are attached to the motor case. The rib portions 6, 6 sandwiched between the motor case cover 9 and the motor case cover 9 have protrusions 10 protruding from the motor case or the motor case cover.
A plurality of paired notch recesses 7, 7, which engage with...
A brush holder characterized by comprising....