JPH0242069Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a brush holding device for a small motor, which aims to stabilize the electrical continuity and mechanical adhesion between the brush plate and the terminal lug material, and is suitable for automation.
Another object of the present invention is to provide a structure of a brush holding device that can be easily assembled to the end cover of a motor.

In the conventional brush holding device, the brush plate and the terminal lug material are fixed together by spot welding, or the L-shaped brush plate 1 is fixed with a cross section of approximately U as shown in FIG.
It is sandwiched between the letter-shaped terminal lug material 2 and the protrusion 3A of the end cover 3, and the tip of the cut and raised piece 2A cut inward on the connecting back wall of the terminal lug material 2 is attached to the brush plate 1. The brush plate 1 and the terminal lug material 2 are brought into pressure contact with each other to achieve fixation and electrical continuity between the brush plate 1 and the terminal lug material 2.

However, the former method requires spot welding, but it is difficult to automate spot welding.
Further, when the brush plate and the terminal lug material are processed by press processing, adding a spot welding process causes confusion during the automated assembly process.
In addition, in the latter method, the assembly work is complicated,
Furthermore, each terminal lug material 2 occupies a large amount of material, which not only increases costs, but also causes problems in that electrical continuity is unstable and unsuitable for automation.

The present invention has been devised in view of the problems of the conventional brush holding device for a small motor, and one embodiment thereof will be described in detail below with reference to the drawings.

Reference numeral 11 denotes a brush plate made of nickel silver clad material or phosphor bronze clad material, and the brush plate 11 has a brush portion 11A formed at one end that comes into contact with a commutator (not shown), and a brush portion 11A that comes into contact with a commutator (not shown) at the other end. The portion 11B is bent to form an L-shape as a whole, and a plurality of engagement holes 11C are formed in the other end attachment portion 11B. 12 is a straight terminal lug plate made of iron or phosphor bronze that is thicker than the thickness of the brush plate 11, and the terminal lug plate 12 has a brush fixing part 12A at one end, a terminal part 12C at the other end, and a center part. Each terminal portion has a locking recess 12B, and the terminal portion 12C is provided with a tapered portion 12D. Fixed portion 1 of this terminal lug plate 12
2A, when pressing the terminal lug plate 12, a recess 12E having a depth approximately equal to the thickness of the brush plate 11 is formed, and a plurality of protruding holes are formed by half punching 12e from the back side. An engaging protruding pin portion 12F is formed. The intervals between the engagement protruding pin portions 12F are provided to correspond to the engagement holes 11C of the brush plate 11, and the length is formed to be slightly larger than the thickness of the brush plate 11. When the mounting portion 11B of the plate 11 is placed, the protruding pin portion 12F passes through the engagement hole 11C of the brush plate 11.
A portion of the tip is formed to protrude from the other end surface of the brush plate 11 as shown in FIG. 4A. As mentioned above, the terminal lug plate 12 is connected to the brush plate 1.
1, it is easy to make the length of the protrusion pin 12F larger than the thickness of the brush plate 11. Then, as shown in FIG. 4A, the brush plate 1 is placed in the recess 12E of the terminal lug plate 12.
1, the terminal lug plate 12 and the brush plate 11 are fixed by caulking the tip protrusion 12F' of the protrusion pin part 12F.

The brush plate 11 and the terminal lug plate 12 fixed in this way are inserted through the through hole 13B provided in the resin end cover 13 of the motor, and the end face 12C' of the terminal portion 12C is attached to the edge of the through hole 13B. It is fixed to the end cap 13 by engaging with the end cap 13. Further, in this state, as shown in FIG. 2, the protruding portions 13A protruding from the end cover 13 are in contact with two sides of the brush plate 11, and prevent the brush plate 11 and the terminal lug plate 12 from tilting. It's becoming like that.

As described above, the brush holding device for a small motor according to the present invention includes a brush plate having mating holes formed at the end thereof,
It consists of a plate-shaped terminal lug material with a mating protrusion slightly longer than the thickness of the brush plate formed at the end by half punching, and the terminal lug material is thicker than the thickness of the brush plate, and The mating protrusion of the terminal lug material is fitted into the mating hole of the brush plate, and the mating protrusion protruding toward the other end surface of the brush plate is inserted into the mating hole of the brush plate. The brush plate and the terminal lug material are fixed together by caulking, and the brush holding device to which the brush plate and terminal lug material are fixed is fitted and locked into a through hole formed in the end cover of the motor. Therefore, the assembly work is easy and suitable for automation, and compared to the conventional brush holding device shown in Fig. 1, the brush plate and terminal lug plate are firmly fixed together by caulking the protruding pin into the engagement hole. This ensures stable electrical conduction and mechanical adhesion.In contrast to the conventional method where the brush plate and terminal lug material are separately assembled to the end cover of the motor, in the present invention, the brush plate and terminal lug material are individually assembled to the end cover of the motor. The brush holding device, in which the plate and the terminal lug material are integrally fixed in advance, is assembled to the end cover, which has the extremely beneficial effect of greatly improving workability compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional brush holding device. FIG. 2 is a perspective view showing the brush holding device according to the present invention, and FIG. 3 is an exploded perspective view showing the coupling structure between the brush plate and the terminal lug material of the device shown in FIG. FIG. 4 is a sectional view for explaining the connection structure between the brush plate and the terminal lug material shown in FIG. 3. 11...Brush plate, 11C...Engagement hole, 12...
Terminal lug material, 12F...Engagement protrusion.

Claims (1)

[Claims for Utility Model Registration] An L-shaped brush plate with an engaging hole formed at the end;
It consists of a plate-shaped terminal lug plate in which an engaging protrusion slightly longer than the thickness of the brush plate is formed in a brush fixing part in which a recessed part having a depth approximately equal to the thickness of the end of the brush plate is formed, The terminal lug plate is thicker than the brush plate and has a straight plate shape, and the engagement protrusion of the terminal lug plate is fitted into the engagement hole of the brush plate, and the other brush plate The brush plate and the terminal lug plate are fixed together by caulking the engagement protrusion protruding from the end face side with the other end face side, and the brush holding device to which the brush plate and the terminal lug plate are fixed is attached to the end cover of the motor. A brush holding device for a small motor configured to fit and lock into a through hole formed in the.