JPS5858849A - Commutator for flat motor and manufacture thereof - Google Patents

Abstract

PURPOSE:To facilitate the connecting work of a coil by constructing the top of a connecting piece in double structure and burying the depending end of a cylindrical core side piece in an insulating material, thereby increasing the strength of the piece. CONSTITUTION:A sector-shaped brush slide piece 31 and a connecting piece 32 which rises from the piece 31 and is electrically integral with the piece 31 are provided. The piece 32 is bent in an inverted U shaped at the top, thereby forming a double structure 23, and the depending end of the cylindrical core side piece 23a of the double structure is buried in an insulating material 5. Since a connecting part 34 is formed in a double structure in this manner and the depending end 23a is secured through the material 5 in an annular shape, the strength of connecting a connecting wire 8 can be largely improved. In this manner, a hot steak method can be employed, and a connecting work of a coil can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fan mutator for a flat motor and a manufacturing method thereof.

Recently, the first commutator for flat motors,
As shown in Figure 2, there is a fan-shaped brush sliding contact piece 2 and a brushing piece 3 that rises from this brush sliding contact piece 2 and is electrically integrated.
A plurality of segments 4, which are covered with a good conductive material, are placed in the current situation, and the segments are connected to each other.
! ! Insulated by company material 5, 1111 written on continuous piece 3]L1
It has been proposed that the segment and the armature coil are connected by pushing the connecting wire 8 of the armature coil 7 into a hole 6 drilled in the section.

However, this type of flat hook mutator l is difficult to manufacture and is therefore expensive. Therefore, for the purpose of cost reduction, the conventional method has been manufactured using the four-way construction shown in Figs. 3 to 6 below.

In the first step, as shown in FIG. 3, the inner chest portion of the disc 9 made of a highly conductive material is raised by press drawing to form a cylindrical shape &1) IO. In the second step, as shown in FIG.
form. In the third step, as shown in FIG. 5, a resin serving as an insulating material 5 is molded on the inner and outer peripheries of a disk 9 having a cylindrical portion 10 formed on the upper part thereof, thereby forming an integrated insulating material g 12.

In the fourth step, as shown in FIG. 6, several slits 13 are formed at one end of the circular rod 9 which is at chest height from the lower end surface of the insulating integrated part 12, facing the slits 11 in the cylindrical part 10. Then each cut was made and this brain hemorrhage occurred? i k・
A fan-shaped sliding contact piece 2 divided into two parts is formed, and the surface of each piece 20 is used as a brush sliding contact surface 14.

Thus, each of these sliding contact pieces 2 is connected to the connection piece 3.
In addition, the adjacent ones are insulated from each other by the slits 11 and 13, and each independently forms one segment 4, and these segments 4 are arranged in a ring shape in the radial direction. , and the slit 13 of the insulating integrated part 12 is integrated by the body part which is not cut.

However, with such conventional commutators and their manufacturing methods, not only is the work with the coil troublesome, but there is also a process where the slit cutting frame is the least workable in the process, resulting in low productivity. There was a problem with it being bad.

The present invention has been made by paying attention to the problems of the prior art described in MIJ, and it is easy to remove the coil from the coil, and the slitting process is performed only once, thereby improving the raw noodle quality. The purpose is to provide a commutator and its yb method.

The present invention will be described in detail below with reference to the drawings.

Figures 7 to 10 are diagrams showing an embodiment of the present invention.

Figure 7 shows the first step, in which 5 minutes of the inner periphery of a disk 9 made of a highly conductive material is raised up by press drawing to form a cylindrical portion 21 and an annular portion 22. The upper end of the cylindrical part 21 is bent into an inverted U-shape with a gap equal to the thickness of the plate to form a double structure part 23, and the annular part 22 is provided with a hole rL during later molding. The pieces 24 are cut and formed at predetermined intervals by the number of segments.

In particular, when forming the stopper piece 24, the ring shape t51 is
> The outer peripheral edge of 22 becomes the current uncut portion 27 (hereinafter referred to as uncut portion 27).

FIG. 8 shows the second step, in which the cylindrical portion 21 and the annular portion 22 have the number of segments,
The slits 26 are cut at fixed points in a radial shape f' with equal spacing by an arbitrary cutter 25 such as a circular saw blade. The cutting position in the annular shape 8IS 22 of the slit 26 is &
Each missing dz piece 24 , 24 that matches one phase of the unevenly shaped portion 22
IiJ] is at the center position, and the end of the cut in the b upper band-shaped portion 22 of the slit 26 is slightly closer to the outer peripheral edge of the band shape 1 than the stopper piece 24. Therefore, an annular uncut portion 27 is formed at the outer peripheral edge of the annular band-shaped portion 22, and the annular band-shaped portion fIIS 22 is not separated by this uncut portion 27 but remains in an integrated state.

FIG. 9 shows the third step, in which the molded product in the second step is inverted, placed in a tank, and resin is injected. As a result, the lower part of the cylindrical portion 21 and the annular band J-shaped FfI'>22
An insulating integrated i28 formed by molding resin as the insulating material 5 is formed in a thick cylindrical shape on the inner periphery of the insulating material 5. The outer diameter of the insulating integrated part 28 is made to be slightly inward than the terminal end of each slit 26, and the inner diameter is made to be slightly smaller than the inner diameter of the double structure part 23 of the cylindrical part 21. kj bk shi, and its cylinder center side piece 23
The height of a is such that its vertical end can be buried in the insulation material 5. The insulating material 5 forming the insulating integrated portion 28 is filled into each slit 26 and the double structure portion 23 of each slit. The surface of each of the slits 26 and 26 of the orbicularis loop-shaped portion 21 is curved, and each removal stopper piece 24 is inserted into the insulating integrated portion 28.

The fourth step shown in FIG. 10 is a step in which the uncut portion 27 at the outer periphery of the annular band-shaped portion 21 is cut off along the circumference of the insulating integrated portion 28 using a cutter 29. Due to this cut-off, when you look at the Funmutator from a narrow W hole, you will see a copper surface and a resin surface (which is caused by the resin getting into the cut-out part) alternately. Since the circular cutting line passes through all the terminal ends of each slit 26, each of the pieces sandwiched between the adjacent slits 26 and 26 forms a segment 30 as shown in FIG. I will do it.

This segment) 30 is composed of a fan-shaped sliding piece 31 divided by a ring-shaped part 2 (26.26) in which the ring-shaped part 2 (2) meets each other, and a circle (2) (26.26) in which the circular part (21) is adjacent to each other. The segments 30 are divided into 11 segments and are connected to each other by the insulating integrated portion 28 while being arranged in a knitted manner in the radial direction. The parts that are integrated and that meet each other in one phase are separated from each other by the insulating material filled in each slit 26 and are independent from each other. Each removal stop piece 24 and connection piece 32
The double structure fragment of each segment 30 strengthens its engagement with the integral part 28.

Thus, the exposed surface of the sliding piece 3 of each segment 30 from the insulating integrated part 28 forms the brush sliding contact surface 33, and the exposed part of the connecting piece 32 forms the connecting part 34.

In Fig. 11, a cut groove 35 is cut in the center of the connection part 34 (in Figs. 7 to 10, the cut groove 3
5 is omitted for convenience. ), this (7J) groove 35 can be formed after the resin molding process or after the final process.This connecting part 34 has a double structure and is fixed in an annular shape through an insulating material, so that the connecting wire 8 The strength of the connection will be greatly improved.

If the strength of the connecting part 34 of the connecting piece 32 is increased in this way,
Since it can withstand high temperatures, a so-called hot steak method can be used.

That is, this hot steak method is a method in which both the connecting wire 8 and the connecting portion 34 are heated with a high-temperature chip heated to a predetermined wet layer, and the connecting wire 8 is pushed into the kerf 35 by the high-temperature chip.

In this way, the connection wire, which has been softened to some extent by heating, is pushed into the cut groove 35 of the connection portion of the connection piece, so that a strong connection can be achieved. In this case, since the top of the commutator itself has sufficient pressure resistance, there is no risk of deformation of the commutator itself as in the conventional case, and quick work is possible.

In the embodiment described above, the top of the connecting piece 32 is folded inward, but the point is that the top of the commutator only needs to have at least a double structure, and can be folded outward or inward, etc. Variations are possible.

In addition, the one mentioned in section 11 also has a pull-out stopper piece 2 on the ring-shaped part 22.
Although the slit 26 is made after cutting and raising the piece 4, in the method of the present invention, the cut 36 may be formed as shown in FIG. . However, in the case of this method, since there is no annular uncut portion 27 mentioned in 1, it cannot be denied that the rigidity is somewhat inferior.

As is clear from the above explanation, according to the present invention, the top of the connecting wire has a double structure, and the hanging end of the cylinder core side piece is immersed in the insulating material, so the strength of this part is improved. , it becomes easy to connect with the coil by hot steak. In addition, since the number of slitting steps, which are the least workable in the process, is reduced to one, productivity can be greatly improved, and an inexpensive commutator for flat motors can be manufactured.

[Brief explanation of the drawing]

A schematic perspective view showing the armature of the Th1lfflLt flat motor, Figure 2 is a perspective view showing one segment of the armature's fun mutator, Figures 3 to 6 show the conventional one-manufacturing method, and Figure 3 shows the Perspective view of 1st process,
Figure 4 is a perspective view of the second process, Figure 5 is a front sectional view of the third process, Figure 6 is a front PB front view of the fourth process, and Figures 7 to 11.
The figure shows an example of the manufacturing method according to the present invention.
Figures 7(a) and (b) are a partial cutaway M1 front view and half plan view of the first process, and Figures 8(a) and (b) are part 9 of the second process.
j fly + front view and half-plane mI view, Figure 9 (a)
(b) is a front view of the third step and half 9...disc,
21... Cylindrical shaped part, 22... Annular shaped part, 23...
...Double structure part, 23a...Cylinder center side piece, 24...Removal stop piece, 25...Cutter, 26...Slit, 2
7... Uncut portion, 28... Insulation integrated part □, 29...
cutter, 30... segment, 31... sliding contact piece, 3
2... Connection piece, 33... Brush sliding contact surface, 34...
Connection part, 35...cut groove.

Claims (1)

[Scope of Claims] ] A segment comprising a brush sliding contact piece having a shape of -'ju= and a connecting piece rising from the brush sliding contact piece and forming an electrically integrated structure, and made of a good conducting metal. , the segments are insulated from each other with an insulating material, and the segments and the armature are arranged in a ring shape. In a fun mutator connected to a coil, the top of the connecting piece is bent into a U-shape to form a double structure, and the hanging end of the cylinder core side piece of this double structure is M.
A commutator for flat motors that is immersed in insulating material. 2. Is the fan-shaped brush sliding contact piece and the electric connection rising from this brush sliding contact piece? A plurality of segments made of a good conductive material are arranged in an annular shape, and the segments are insulated from each other with an insulating material. Inside the amateur coil
&4' b k #i L, In the construction method of the fun mutator which connects the segment and the armature coil by inserting, the inner circumferential part of the disc made of the material is raised by stamping. The first step is to form the cylindrical part and the strip-shaped part, and the slits of the number of strokes are made in the picture-shaped part at an initial interval of radial forest, and the remainder of 9 is made on the outer cylinder edge of the can-shaped capital to form νJ. 6. In the second step, the insulating integrated part made of insulating material is formed around the image-shaped part by i+i. 11. A method for manufacturing a fan mutator for a flat motor, characterized by comprising a fourth step of cutting the cut portion by 9 degrees.