JPH0865979A - Field assembly of commutator motor, commutator motor containing such field assembly and manufacture of field assembly - Google Patents

Abstract

PURPOSE: To provide a field assembly of a commutator motor, a motor and a method for the manufacture of the field assembly, wherein improvement of winding speed and automatic winding by inexpensive winding equipment are feasible, and wherein electrical sheets of different grades can be used for its armature core and field core without increase in chips produced during stamping of iron cores. CONSTITUTION: An iron core is divided into four parts: Two yokes 1 having a pair of junctions 1a on both sides of the field core of a two-pole commutator motor, and two poles 2 having a pair of junctions 2a, capable of being joined to the yorks 1, and having slots formed. A wire 4 is wound around the poles 2 of the four-divided iron core from outside the iron core by means of a flyer. Then the yokes 1 and the poles 2 are secured together by press fit to form a field assembly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field assembly of a commutator motor used in vacuum cleaners, electric tools, etc., a commutator motor having the field assembly, and the manufacture of the field assembly. It is about the method.

[0002]

2. Description of the Related Art FIG. 7 is a front view of a conventional field assembly. In FIG. 7, 9 is a field iron core, and a plurality of electric iron plates are laminated. A field winding 11 is wound around the field core 9 using the winding frame 10 as an insulator.

FIG. 8 is a front view of a conventional winding method. 1
Reference numeral 2 is a nozzle for supplying the field winding 11 when winding the field iron core 9. 2 from the two nozzles 12, 12
The field windings 11, 11 are supplied, and the two nozzles 12, 12 move inside the field core 9 in the paper penetration direction of FIG. 8 to the upper side and rotate 180 degrees, and the paper penetration direction. The nozzle is moved downward and rotated 180 degrees in the opposite direction to achieve one turn of the coil, and this turn is repeated, and each guide 13 for guiding the winding 11 to the slot 14 when applying the winding causes the nozzles described above. While guiding the field winding 11 supplied from 12 to each slot 14, two poles are simultaneously wound.
However, in FIGS. 7 and 8, the same parts are designated by the same reference numerals.

[0004]

However, in the conventional field iron core 9 described above, the nozzles 12, 12 supplying the field windings 11, 11 move 180 degrees inside and out of the field iron core 9. Since the winding method is complicated, that is, the winding work is performed by repeating rotation and reverse rotation.
This method has the drawback that the winding speed can be increased only up to about 400 revolutions per minute and the winding equipment becomes expensive. Further, as a countermeasure against the recent demand for higher efficiency of the commutator motor, when reducing copper loss by thickening the field winding, it is difficult to thicken the field winding by the conventional winding method. Had a problem. That is, for example, in a bobbin winding that is a conventional high-speed winding method, the wire diameter of 0.65 mm is usually the limit.

At a high rotational speed of about 30,000 to 40,000 revolutions per minute as in a commutator motor for an electric vacuum cleaner, the ratio of armature iron loss to the field iron loss is large. Therefore, in order to reduce the armature iron loss, an electric iron plate having a high material grade (for example, an iron plate containing a large amount of silicon) is used as the material of the armature. However, normally, in order to reduce the scrap 28 at the time of punching,
As shown in FIG. 5, since the armature iron core 26 and the field iron core 27 are punched simultaneously from the electric iron plate 37 made of the same material, the field iron core 27 has a relatively small field iron loss. An electric iron plate with a high material grade that is not necessary, that is, an iron plate containing a large amount of silicon is used.
In order to reduce the material cost only for the electric iron plate 39 of the field iron core 27 in order to reduce the material cost, even if the field iron core 27 is punched out from the electric iron plate 39 of another material, as shown in FIG. While there are many scraps 38 at that time, as shown in FIG. 6B, there is a problem that the scraps 38 when punching the armature core 26 from the electric iron plate 40 also increase.

The present invention is directed to a field assembly of a commutator motor, which improves the winding speed and enables automatic winding by inexpensive winding equipment, a commutator motor having the field assembly, and the field assembly. It is an object of the present invention to provide a three-dimensional manufacturing method.

[0007]

In order to achieve this object, the present invention is constructed as follows. A field assembly for a two-pole commutator motor according to claim 1 of the present invention comprises a pair of yoke portions having joint portions at both ends thereof, and a joint portion which can be joined to the joint portions of the yoke portions. And a pair of pole portions each having a slot for forming a field iron core.

A field assembly for a two-pole commutator motor according to a second aspect of the present invention is characterized in that, in the first aspect, the joint portions of the yoke portion and the joint portions of the pole portion can be press-fitted and fixed. It is configured to be connected. A field assembly for a two-pole commutator motor according to a third aspect of the present invention is the first or second aspect.
In, each joint of the yoke portion is formed in a key shape,
Each of the joint portions of the pole portion is formed in a key shape that can be press-fitted and fixed to the key shape.

According to a fourth aspect of the present invention, there is provided a field assembly for a two-pole commutator motor according to the first or second aspect, wherein each of the joint portions of the yoke portion and each of the joint portions of the pole portion are One of them is a convex portion, and the other one is a concave portion into which the convex portion can be press-fitted and fixed. A field assembly for a two-pole commutator motor according to a fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, a shape of a joint portion at both ends of the yoke portion is asymmetrical. The shape of the joints at both ends of the pole portion is also asymmetrical.

According to a sixth aspect of the present invention, there is provided a two-pole commutator motor having the field core according to any one of the first to fifth aspects. A two-pole commutator motor of the present invention according to claim 7 is an electric iron plate that constitutes a rotatable armature core, and an electric iron plate that constitutes the field iron core according to any one of claims 1 to 5. Are made of different materials.

According to an eighth aspect of the present invention, there is provided a method for manufacturing a field assembly of a two-pole commutator motor according to any one of the first to fifth aspects, in which a winding is wound around a pole portion of the field core. After the winding work is performed, the joint portion of the pair of pole portions and the joint portion of the pair of yoke portions are joined and fixed to each other to be assembled.

[0012]

According to the field assembly of the commutator motor, the commutator motor having the field assembly, and the method for manufacturing the field assembly, the winding speed of the field winding is improved and the winding is inexpensive. It is possible to enable automatic winding by wire equipment, and it is possible to easily cope with thicker field winding. Further, since the field core and the armature core can be punched separately without increasing scraps when punching the iron core, it is also possible to lower the material grade of the electric iron plate of the field iron core with small iron loss, The material cost can be reduced while reducing the decrease in motor efficiency.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a field assembly according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a yoke portion of a split iron core in which a plurality of electric iron plates are stacked, and 2 is a pole portion of a split iron core in which a plurality of electric iron plates are stacked. Each yoke 1 has a key-shaped joint 1a at each end, and each pole 2 has a key-shaped joint 2a at each end corresponding to the yoke 1a. And each joint portion 1a of each yoke portion 1
Each joint 2a of each pole portion 2 is press-fitted and fixed to form a joint assembly 3. A field winding 4 is wound around the pole portion 2 with the winding frame 5 as an insulator.

Therefore, the field assembly of this embodiment comprises a pair of the yoke portions 1 and a pair of the pole portions 2 and the winding 4 around the winding frame 5 of each pole portion 2 before assembly. After winding, the yoke portion 1 and each pole portion 2 are connected by the joint portion assembly portion 3 formed by press-fitting and fixing the joint portion 1a of each yoke portion 1 and the joint portion 2a of each pole portion 2. I am configuring. In the present embodiment, the joint assembly portion 3 is connected to each pole portion 2 and each yoke portion 1.
By making them asymmetrical with respect to the center of each of them, it is possible to stack only one of the front and back sides of the yoke portion 1 and the pole portion 2, and to reduce the dimensional variation when the yoke portion 1 and the pole portion 2 are press-fitted. are doing.

However, in another embodiment different from this embodiment, when the method of assembling the layers by measuring the laminated thickness of the iron core when punching out the field iron core, the assembly is performed regardless of the front and back of the yoke part. Since the variation can be reduced even in the case of performing the above, the shape of the joining part assembling part 3 can be made into various shapes without being left-right asymmetrical.

FIG. 2 is an explanatory view for explaining a field winding method according to an embodiment of the present invention. In FIG. 2, 6
Is a flyer for supplying the field winding, and the flyer 6 rotates around the winding frame 5 of the pole portion 2 in a state where the yoke portions 1 are not provided at both ends of the pole portion 2 before the assembly of the field assembly. A guide 7 for guiding the winding 4 to the slot 8 when applying the winding.
Thus, the field winding 4 is guided around the slot 8 of the pole portion 2 and wound around the winding frame 5. However, FIG. 1 and FIG.
The same parts are designated by the same reference numerals. The guide 7 is usually made of iron and has a polished surface so that the winding is not scratched.

As described above, in this embodiment, the field iron core of the two-pole commutator motor is provided with the pair of yoke portions 1 each having the key-shaped joint portion 1a at each end, and is joined to the yoke portion 1. A pair of pole portions 2 each having a key-shaped joint portion 2a capable of being formed and forming a slot 8 for housing the winding 4, and a pair of yoke portions 1 and 1 and a pair of pole portions. It is configured to be divided into 2, 2 and 4. In such a configuration, as described above, after winding the winding on each pole portion 2 from the outer periphery of the iron core with the fryer 6, the pair of yoke portions 1, 1 and the pair of pole portions 2, 2.
, 1a, 2a, ..., 2a are press-fitted and fixed together to assemble the field assembly.

When performing the winding work on the pole portion 2 of the field iron core divided into four as described above, the yoke portion 1 is not present at both ends of the pole portion 2, that is, before the assembly of the field assembly. Since the yoke part 1 does not interfere with the winding work during the winding work and the winding work can be performed on the pole part 2 only by rotating the fryer 6, the winding work can be performed at high speed. As a result, the number of man-hours can be reduced, and automatic winding can be performed by inexpensive winding equipment. In the present embodiment, although it depends on the wire diameter, for example, it is possible to increase the speed from about 400 revolutions per minute to about 1500 to 2000 revolutions per minute in the related art. Here, the joint portion 2 at each end of the pole portion 2
If the tip of a projects more than the tip 2b of the pole part 2, or if the yoke part 1 is coupled to the joint part 2a of the pole part 2 and the tip of the yoke part 1 projects more than the tip 2b of the pole part 2. , Hinders the rotation of the fryer 6 during winding work,
High-speed winding work becomes difficult. Therefore, the yoke portion 1 is not joined to each joint portion 2a of the pole portion 2 and the joint portion 2a
It is preferable that the protrusion does not protrude beyond the tip 2b of the pole portion 2, but the joint portion 2a of the pole portion 2 needs to have a certain length in order to secure a certain space for the slot 8. Therefore, in this embodiment, as shown in FIG.
The length of the joint portion 2a of the pole portion 2 is set to be substantially the same as the length of the tip 2b of the pole portion 2. Also, the yoke parts 1, 1
In order to speed up the winding work by winding the winding in a state in which there are no poles at both ends of the pole portion 2, the field assembly has four pole portions 2 and 2 and two yoke portions 1 and 1. It is necessary to divide it.

Further, conventionally, since the yoke portions 1 are present at both ends of the pole portion 2 during the winding work on the pole portion 2, the diameter of the winding is limited (for example, in the case of bobbin winding, the wire diameter is limited). 0.65m
However, in this embodiment, since the yoke portions 1 are not provided at both ends of the pole portion 2 when the winding work is performed on the pole portion 2, the diameter of the winding can be made larger than the conventional one. For example, in this embodiment, the wire diameter can be increased to 1.2 mm, for example.

Further, in the past, since the field iron core was not divided, the square frame-shaped field iron core was punched out from the plate material as it was, and the portion 3 shown by hatching in FIG.
No. 8 was a scrap, and a lot of scraps were generated. Therefore,
As one method for reducing the amount of scraps, as shown in FIG.
The armature iron core 26 and the armature iron core 26 are punched out, and the armature iron core 26 is punched inside the field iron core 27 at this time to reduce the amount of scraps 28. On the other hand, in the present embodiment, as shown in FIGS. 4A and 4B, the field iron core is composed of four divided parts. Therefore, the yoke portion 1 and the pole portion 2 of the field iron core are formed. When punching out the field iron core from the electric iron plate by punching out the electric iron plate for the field iron core by arranging various parts that are divided into four parts and arranging them so that the amount of scraps is minimized. The amount of the scraps 30 can be greatly reduced. Along with this, punching material 3 for armature cores
2 can be freely arranged in the electric iron plate for the armature core to reduce the scrap 31 at the time of punching. further,
Since it is possible to reduce the amount of scraps by freely arranging the field core as a four-divided body, as shown in FIG. 4, different materials are used for the field core and the armature core, and each of them is different. The field core and the armature core can be punched out more efficiently than the plate material, and the material of the field core with a small iron loss can be made cheaper and lower in grade than the material of the armature core. It is possible to reduce the material cost while reducing the decrease in the efficiency.

The shapes of the joint portion 2a of the pole portion 2 and the joint portion 1a of the yoke portion 1 are not limited to those shown in FIG. 1, and may be, for example, those shown in FIG.
In FIG. 3, the field iron core has two pole portions 22, 22, 2
It is provided with two yoke portions 21 and 21 and reels 25 and 25. The joint portion 22a of the pole portion 22 has a shape protruding from the central portion of the end portion of the pole portion 22, and the joint portion 21a of the yoke portion 21 has a dovetail groove shape for press-fitting and fixing the protruding joint portion 22a. Has been done. Note that FIG. 3 shows a state in which the electric motor core 26 is arranged at the center of the field core, and 28 is a slot for winding. In FIG. 3, the joint portion 21a of the yoke portion 21 has a shape protruding from the central portion of the end portion of the yoke portion 21, and the joint portion 22a of the pole portion 22 press-fits and fixes the protruding joint portion 21a. You may make it comprised from a dovetail groove shape. Also,
Both joints 21a and 22a may be configured in any other shape.

[0023]

As described above, the field assembly of the commutator motor according to the present invention and the commutator motor having the field assembly are the key-type joining of the field iron core of the two-pole commutator motor. A yoke portion having a groove portion and a key-shaped joint portion capable of joining the yoke portion, and a pole portion that forms a slot, and is divided into four parts. After winding the winding on each pole portion of the iron core from the outer circumference of the iron core with a flyer, the yoke portion and the pole portion are press-fitted and fixed to assemble the field. Therefore, the yoke does not obstruct the winding of the poles with the flyer, the winding speed of the field winding can be improved, and automatic winding with inexpensive winding equipment is possible. In addition, it is possible to easily cope with the thickening of the field winding. Further, since the field iron core is divided into four parts, when the electric iron core is punched, the four-divided iron core can be arranged and punched so as to reduce scraps, and the amount of scraps at the time of punching can be reduced. In addition, even if the field core and the motor core are punched from different materials, the amount of scraps in the field core does not increase, so an electric iron plate for punching only the field core with a small iron loss. It is possible to reduce the material grade, and it is possible to reduce the material cost while reducing the decrease in the motor efficiency.

Further, according to the method for manufacturing the field assembly, as described above, the winding work can be performed without the yoke portions at both ends of the pole portion, so that the winding operation can be performed with inexpensive equipment only for the flyer. The work can be speeded up and a thicker winding can be wound. In addition, when punching a field iron core divided into four parts from an electric iron plate, the divided parts of the field iron core can be freely combined and arranged so as to reduce the amount of scrap, and then punched. The amount can be greatly reduced. Further, even if the field core and the armature core are punched from different electric iron plates, the amount of scraps does not increase so much, so that each iron core can be punched from the optimum electric iron plate.

[Brief description of drawings]

FIG. 1 is a front view of a field assembly according to an embodiment of the present invention.

2 is a front view of a pole portion for explaining a field winding method applied to the field assembly in the embodiment of the present invention shown in FIG.

FIG. 3 is a front view of a field assembly of an embodiment different from the embodiment of the present invention shown in FIG.

FIG. 4A is a diagram showing an arrangement example of four-divided field iron cores when punching the field iron core of the field assembly of FIG. 1 from an electric iron plate for the field iron core. The figure which shows the example of arrangement | positioning of the armature core at the time of punching out the armature core of an assembly from the electric iron plate for armature cores.

FIG. 5 is a diagram showing an arrangement example of a field core and an armature core when punching the field core and the armature core from one electric iron plate.

FIG. 6A is a diagram showing an arrangement example of the field iron cores when punching the field iron core from the electric iron plate for the field iron core. FIG. 6B is an electric machine when punching the armature iron core from the electric iron plate for the armature iron core. Diagram showing an example of the arrangement of child iron cores

FIG. 7 is a front view of a field assembly in a conventional example.

8 is a front view of a field assembly for explaining a field winding method in the conventional example of FIG.

[Explanation of symbols]

 1, 21 Split core yoke part 1a, 21a Joint part 2, 22 Split core pole part 2a, 22a Joint part 2b Tip 3 Joint part assembly part 4 Winding 5, 25 Winding frame 6 Flyer 7 Guide 8, 28 slots 30, 31, 28, 38

Claims (8)

[Claims] 1. A pair of yoke portions (1, 21) having joint portions (1a, 21a) at both ends, and the yoke portions (1, 2).
The joint part (2) that can be joined to the joint part (1a, 21a) of 1)
a, 22a) and a pair of pole parts (2, 22) having slots (8, 28) for winding formed therein, and a field assembly of a two-pole commutator motor having a field core. 2. Joint parts (1) of the yoke parts (1, 21)
a, 21a) and each of the joints (2) of the poles (2, 22)
The field assembly for a two-pole commutator motor according to claim 1, wherein the field assembly is fixedly press-fitted with a. 3. Joint parts (1) of the yoke parts (1, 21)
a, 21a) is formed in a key shape, and the pole portions (2, 22) are formed.
The field assembly for a two-pole commutator motor according to claim 1 or 2, wherein each of the joints (2a, 22a) is formed in a key shape that can be press-fitted and fixed to the key shape. 4. The joint portions (1) of the yoke portions (1, 21)
a, 21a) and each of the joints (2) of the poles (2, 22)
The field assembly of a two-pole commutator motor according to claim 1 or 2, wherein any one of a and 22a) is a convex portion and the other is a concave portion into which the convex portion can be press-fitted and fixed. 5. The joint portions (1a, 21a) at both ends of the yoke portion (1, 21) are asymmetrical in shape, and correspondingly, the joint portions at both ends of the pole portion (2, 22) are formed. (2a, 2
The field assembly of a two-pole commutator motor according to any one of claims 1 to 4, wherein the shape of 2a) is also asymmetric. 6. A two-pole commutator motor provided with the field iron core according to claim 1. 7. An electric iron plate forming a rotatable armature iron core (26) and an electric iron plate forming the field iron core according to any one of claims 1 to 5 are made of different materials.
Pole commutator motor. 8. A winding work for winding a winding (4) around the pole portions (2, 22) of the field core according to claim 1, and thereafter, the pair of pole portions ( The field of a two-pole commutator motor assembled by joining and fixing the joint portions (2a, 22a) of the second and the second yoke portions (22a) and the joint portions (1a, 21a) of the pair of yoke portions (1, 21), respectively. Assembly manufacturing method.