JP2579538Y2 - Rotating electric machine - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a rotating electric machine such as a small DC motor.

[0002]

2. Description of the Related Art A structure as shown in FIGS. 15 and 16 is known as a conventional small DC motor. The motor 21 has a winding 23 on an iron core 25 fixed to a rotating shaft 24.
Is wound, and the rotating shaft 24 has a bearing 3
A housing 33 is supported by a shaft 2, and a magnet 28 is fixed to the inner peripheral surface of the housing 33 so as to face the iron core 25. Further, the commutator 30 having the segment 30a is provided on the rotating shaft 24 so as to rotate integrally therewith. 34 is a brush. Figure 1
6 is a D-D line cross-sectional view of FIG. 15.

[0003]

[Problems to be Solved by the Invention] In the conventional motor 21 , however, the iron core 25 and the commutator 30 must be formed as separate parts, so that the iron core 25 and the segment 30a are formed.
There is a problem that an insulating holder is required to insulate the components from each other, and the number of parts is large, and the number of assembling steps is accordingly increased.

The present invention has been made in view of the above problems, and has as its object to provide a rotating electric machine that can solve each of the conventional problems.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention relates to an iron core fixed to a rotating shaft, comprising a groove for winding and a salient pole facing a multipolar magnetized field. In a rotating electric machine including an armature having windings wound around salient poles and a commutator rotating integrally with the rotating shaft, at least two core materials of the iron core are arranged in a direction parallel to the rotating shaft. Along with forming the salient pole, a part of the core material is protruded in the axial direction of the rotating shaft , and the surface of the protruding portion is plated to form a commutator piece of the commutator. Have .
Further, other of the present invention is in a solid set the spark quenching element to the core.

[0006]

According to the configuration of the present invention, at least two core materials of the iron core are overlapped in a direction parallel to the rotation axis to form salient poles, and a part of the core material is connected to the axis of the rotation axis . In this case, the surface of the projecting portion is plated to form a commutator piece of the commutator. Thus, the iron core and the commutator (commutator) can be composed of the same parts, and an insulating holder is not required, so that the number of parts can be reduced and the number of assembling steps can be reduced. According to the configuration of the present invention, the spark generated at the time of rotation can be eliminated by fixing the spark elimination element to the iron core.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention , and FIG.
FIG. 2 is a cross-sectional view taken along line DD of FIG. 1 . FIGS. 3 to 8 are explanatory diagrams of main parts of the present embodiment.

A motor 1 as a rotating electric machine according to the present embodiment
Is provided with a salient pole 6 facing a winding groove 7 and a magnet 8 as a multipolar magnetized field, and an iron core 5 fixed to a rotating shaft 4 and a winding wound around the salient pole 6. An armature 2 having a wire 3 and a commutator 10 as a commutator that rotates integrally with the rotating shaft 4 are provided . And the above iron core 5
Core material 9 is composed of at least two pieces, a first core material 9A and a second core material 9B, and each core material 9A, 9B is a rotating shaft.
4 , the salient poles 6 are formed in parallel with each other, and a part of the core members 9A, 9B is protruded in the axial direction of the rotary shaft 4 , and the surface of the protruded portion 9a is plated. A commutator piece of the commutator 10 is formed with a segment 10a. A varistor 11 is fixed to the iron core 5 as a spark quenching element. 12 is a bearing, 13 is a housing, and 14 is a brush.

FIG. 3 is a perspective view showing a main part of the motor 1, FIG. 4 is a top view as viewed from a direction A in FIG. 3, and FIG. 5 is a bottom view as viewed from a direction B in FIG. FIG. 6 shows FIG.
7 is a vertical sectional view taken along line XX of FIG. 4, and FIG. 8 is an enlarged view of a part of FIG.

[0010] The varistor 11 is notched portions to form a 15 A by removing the insulation coating 15 is formed on the core material 9 is fixedly provided with soldered to the notch 15A. 8, 10A is a segment 10a formed on the core material 9.
Is a plating layer.

Next, a method of manufacturing the armature 2 of the motor 1 according to the present embodiment will be described in order of steps with reference to FIGS. First,
A hoop material 17A is prepared as a core material as in step A, and a plating layer 10A is formed on this surface as in step B. The plating layer 10A is made of Cu, Ni, Ag or the like, and is formed in two or more layers as necessary. Further, the plating layer 10A may be formed not only in the hoop material 17A but also in a strip shape after cutting. Next, an insulating film 15 is formed on the surface of the plating layer 10A as in Step C.

Next, a cutting process is performed to form a projecting portion 9 a in a part as in step D to form a segment 10 a integrated with the core material 9. Next, as in step E, the core material 9 is bent along the extension line 10B in the length direction of the segment 10a to form the first core material 9A.

Next, as shown in step A of FIG. 10, another hoop material 17B is prepared, an insulating film 15 is formed on the surface of the hoop material 17B as in step B, and then a cutting process is performed to obtain the same as in step C. Then, a core material 9 is formed as shown in step D
Is bent from the center line 10C to form the second core material 9B.

Next, as in a step E, for example, three first core materials 9A and three second core materials 9B are formed integrally using an adhesive or the like so as to be adjacent to each other. .
Subsequently, as shown in FIG. 11, the rotation shaft 4 is inserted and fixed in the hollow portion 18A shown in FIG. 10, and the space portion 18B is used.
Te, a second core adjacent through the first core member 9A 9
The armature 2 is assembled by winding the winding 3 between B.

FIG. 12 is a longitudinal sectional view along the plane D in the configuration of FIG. FIG. 13 is a longitudinal sectional view along the plane E in FIG. Further, FIG.
4 shows a cross-sectional view along the plane C in FIG.

As is clear from FIG. 13, the varistor 1
1 are connected by solder 19 to the exposed surface insulating film 15 of the first core member 9 A is removed. The solder 19
Together with the winding start portion of the winding 3 wound around the salient poles of the armature is connected to the left side position, in the right side position of the solder 19 winding end of the winding 3 wound around the salient poles The parts are connected. The wiring method may be such that wiring is performed on the plating layer of the first core material 9A other than the wound salient pole. Further, the wiring may be performed by a star connection.

As described above, according to the present embodiment, since the core member 9 in which the iron core 5 and the commutator 10 are made of the same component is used, it is not necessary to use another component as in the related art, so that the insulating holder is used. Can be eliminated. In addition, the number of parts can be reduced accordingly, so that the number of assembly steps can be reduced.

The plating layer 10 formed on the core material 9
A and the insulating film 15 may be selectively formed. The formation of the plating layer 10A and the insulating film 15 may be performed after the formation of the shape as the core material 9 . Further, in the manufacturing method shown in FIGS. 9 to 11, the removal of the insulating film 15 may be performed collectively in the same step.

[0019]

[Effects of the Invention] As described above, according to the present invention, the iron core and the commutator are made of the same parts, so that an insulating holder can be eliminated, the number of parts is reduced, and the number of assembly steps is reduced. Can also be reduced. Still more, iron
Generated during rotation by fixing the spark extinction element to the heart
Elimination of sparks, which allows for safe and long-term use of the product
Ability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line DD of FIG.

FIG. 3 is a perspective view illustrating a main part of the present embodiment.

FIG. 4 is a top view as viewed from a direction A in FIG. 3;

FIG. 5 is a bottom view as seen from a direction B in FIG. 3;

FIG. 6 is a perspective view seen from a direction B in FIG. 3;

FIG. 7 is a vertical sectional view taken along line XX of FIG. 4;

FIG. 8 is an enlarged view showing a part of FIG. 7;

FIG. 9 shows the armature used in the rotating electric machine of the embodiment .
FIG. 4 is a process chart showing a method for producing a core material of No. 1 .

FIG. 10 shows an armature used in the rotating electric machine of the present embodiment.
It is a process drawing showing the manufacturing method of the 2nd core material .

FIG. 11 is a perspective view illustrating a main part of the rotating electric machine according to the present embodiment.

FIG. 12 is a longitudinal sectional view taken along a plane D in FIG. 11;

FIG. 13 is a longitudinal sectional view taken along a plane E in FIG. 11;

FIG. 14 is a cross-sectional view taken along a plane C in FIG. 11;

FIG. 15 is a longitudinal sectional view showing a conventional example.

16 is a cross-sectional view taken along the line DD in FIG.

[Description of Signs] 1 Motor (rotating electric machine) 2 Armature 3 Winding 4 Rotating shaft 6 Salient pole 9, 9A, 9B Core material 9a Projecting portion 10 Commutator 10a Segment (commutator piece) 10A Plating layer 11 Varistor 15 Insulation coating

Continued on the front page (72) Inventor Masayuki Ishikawa 14-888 Ako, Komagane-shi, Nagano Sankyo Seiki Seisakusho Co., Ltd. Komagane Plant (56) References Real Open 57-58965 (JP, U) Real Open Sho 53- 155005 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 13/00 H02K 1/24

Claims (2)

(57) [Scope of request for utility model registration] An armature having a winding groove and a salient pole facing a multipolar magnetized field, having an iron core fixed to a rotating shaft, and a winding wound on the salient pole; A rotating electric machine comprising a commutator rotating integrally with the rotating shaft, wherein at least two core materials of the iron core are overlapped in a direction parallel to the rotating shaft to form the salient pole, and the core material A part of the commutator is formed by projecting a part of the commutator in the axial direction of the rotating shaft and plating the surface of the projecting part to form a commutator piece of the commutator. 2. The rotating electric machine according to claim 1, wherein a spark quenching element is fixed to said iron core.