JPS60216745A - Motor - Google Patents

Abstract

PURPOSE:To readily and inexpensively manufacture a motor in a mass production by employing plastic as a member for mounting and protecting a yoke, and integrally forming it. CONSTITUTION:A disc type commutator fan motor 1 uses as a stator a casing 2 and as a rotor a rotary fan 3. A stay 8 and an air passage hole 9 are injection molded with plastic which contains no iron powder integrally with the same material at the bottom of the casing 2 in case of molding the casing 2. A circular stator yoke 7 formed by injection molding plastic which contains iron powder at the inner bottom of the casing 2 integrally with the casing 2 having the stay 8 and the hole 9. Thus, the casing 2 molded integrally with the yoke 7 formed with the plastic which contains iron powder can be readily manufactures in a mass production.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a yoke formed by injection molding of a glasstic containing iron powder into a predetermined shape, and a member formed by injection molding of a glasstic containing no iron powder into a predetermined shape. The present invention relates to a motor characterized in that it is integrally formed by injection molding one of the plastic parts and then injection molding the other plastic part.

The present invention is to obtain an efficient Tanabata festival by using a yoke with low iron loss, and to attach the above-mentioned yoke.

By using inexpensive plastic as a protective member and integrally forming the casing and rotating fan, the fan can be made lightweight and extremely easily and inexpensively by plastic injection molding. This was designed to enable mass production of e-ta, such as 6-ta. Other objects of the invention and the following description.

It will become clear.

An embodiment of the present invention will be described below with reference to one drawing.

FIG. 1 is a longitudinal cross-sectional view of a disk-type metal fan e-1 shown as an embodiment of the present invention, FIG. 2 is a perspective view of a casing 2 of the disk-type metal fan e-1, and FIG. The figure below is a perspective view of the rotating fan 6.

The disk type metal fan e-1 will be explained mainly with reference to FIGS. 1 to 3. The disk-type Kinryuko fan e-1 is rectangular in the plane shown in FIG. 2, and the casing 2, which has a cup-shaped longitudinal section, serves as a stator, and the rotary fan 3 shown in FIG. 3 rotates. It has become a child. As will be clear from the description below, the casing 2 and the rotary fan 6 are made of plastic that does not contain iron powder, and are formed by plastic injection molding. At the bottom of the casing 2, a stay 8 and an air passage hole 9 are integrally formed of the same material when the casing 2 is formed by injection molding of plastic not containing iron powder. A fixed shaft 10 is fixed vertically at the center of the bottom of the casing 2 (1).To do this, the fixed shaft 10 is installed vertically in a plastic injection mold in advance, and the Plastic that does not contain iron powder is injected into the mold, cooled and solidified, and then removed from the mold.

It has an annular stator yoke 7 or stay 8 and air passage holes 9 formed by injection molding plastic containing iron powder.
It is integrally formed with the casing 2. In order to do this, it may be formed according to the principle of the general plastic injection molding method shown below. Incidentally, since various methods for plastic injection molding are known, detailed explanations thereof will be omitted. First, as shown in Figure 4,
An upper die 18 and a lower die 20 having an injection hole 19 are installed to form an annular stator yoke 7, and plastic containing iron powder is injected through the injection hole 19, cooled and solidified to form an annular shape. A stator yoke 7 is formed. After that, the lower mold is removed, and the lower mold 22 having the injection hole 21 is made.
Plastic containing no iron powder is injected into the space formed by the upper mold 18 and the stator yoke 7 through the inlet hole 21, cooled and solidified, and then the mold 18 and the lower mold are By taking it out from 22, a through hole 2 is formed in the center made of iron-containing glass as shown in the 6th step.
It is possible to form a casing 2 having a through hole 25b in the center thereof, which is made of plastic that does not contain iron powder, and is integrally formed with a stator yoke 7 having a stator yoke 3a. By using the method described above and using an appropriate mold, as shown in FIGS. 1 and 2, the stator yoke 7 made of plastic containing iron powder is integrally formed with plastic that does not contain iron powder. did. A disk-shaped metal fan with a square planar shape and a cup-shaped vertical section. f2
can be easily mass-produced. Since the stator yoke 7 is made of plastic containing iron powder, its magnetic permeability is inferior to that made of iron. In addition to making the fan e-1 highly efficient, by using an appropriate mold, it can be formed into various suitable shapes extremely easily and inexpensively, and is also easy to process, and is made only of iron material. Unlike other fans, it is light, elastic, strong, and rust-resistant, so there is no need to apply anti-rust treatment.
- It is possible to form the first part at a low cost. Since the casing 2 can be made of plastic with a certain color, there is no need to add color by alumite treatment after forming it from metal as in the past, and it can be formed at low cost and is lightweight. Therefore, together with the stator yoke 7, the fan 1 can be made very light.

Furthermore, by using an appropriate mold, it is possible to mass-produce casings 2 of various shapes at an extremely low cost and easily.
) A four-pole annular field magnet 4 having magnetic poles of equal width alternately is fixedly installed. In this case, it is preferable that the material forming the field magnet 4 is a plastic magnet, since the stator yoke 7 and the casing 2 can be easily integrally formed by plastic injection molding. In this way, the fan e-type 1 can be mass-produced at a lower cost and can be made lighter in weight. A plastic ring 11 is fixed to the inner periphery of the center hole of the field magnet 4, and a brush 16 that makes sliding contact with the commutator 12 is fixed to the plastic ring 11. It is rotatably housed in the recess 14 of the casing 2. The rotary fan 3 has a main body 6a having a cup-shaped longitudinal section, and the outer periphery of the cup body 6a includes:
A blade 6b for blowing air into the air passage hole 9 is integrally formed. The rotary fan 6 is made of plastic that does not contain iron powder by the same method as the casing 2, and is integrally formed with a rotor yoke 16, which will be described later.

At approximately the center of the inner bottom of the main body 6a of the rotating fan 3.

A cylindrical bearing housing 15, which also serves as a bearing, is vertically fixed so as to rotate around the outer circumference of the fixed shaft 10. The rotor yoke 16 made of plastic containing iron powder is integrally formed with the rotating fan 6 by injection molding of plastic so as to be located at the inner bottom of the main body 6a. On the lower surface of the rotor yoke 16, three armature coils 5-1. ..., 5-6 groups are fixedly installed. Note that the bearing housing 15. The rotor armature 6 is connected to the rotary fan 3 indicated by h.A plastic injection ring 15 is inserted into the fixed shaft 10.The bearing housing 15 cannot be removed from the fixed shaft 10 by a spring (not shown) or an E-ring to prevent removal. On the outer periphery of the upper end of the bearing housing 15, which is designed not to come out.

A commutator 12 consisting of commutator pieces is fixed.

The reason why the commutator 12 is provided at such a position will be explained.

In order to improve the rectification characteristics, it is necessary to increase the number of commutator pieces. Conventionally, a commutator consisting of commutator pieces is attached to the rotating shaft, but since the diameter of the rotating shaft is small,
There is a limit to increasing the number of commutator pieces, and as a result, there is also a limit to the same rectification characteristics. Therefore, in the fan e-type 1 of the present invention.

By forming the commutator 12 on the outer periphery of the bearing/1 housing 15 having a large diameter, the number of commutator pieces can be increased as much as possible, and the same t of rectification characteristics can be achieved. rotor armature 6
As shown in Fig. 8, three air-core armature coils 5 are used.
-1. ..., 03 armature coils 5 consisting of 5-6
-1. . . , 5-6 are arranged at equal intervals with a 120 degree hitch so as not to overlap each other. Armature coil 5
-1. ....

5-6 is a conductor portion 5a that contributes to the generated torque in the radial direction.
Since the opening angle between the armature coil 5 and the armature coil 5 is approximately equal to the magnetic width of the field magnet 4, the field magnet 4 has four poles. -1.・
..., 5-6 are conductor parts 5a and 5b that contribute to the generated torque
It has a fan frame shape with an opening angle of approximately 90 degrees. Circumferential conductor portion 5C of armature coils 5-1, ..., 5-3
,5d is.

It is a conductor portion that does not contribute to the generated torque.

Referring to the developed view of FIG. 9, it is clear that the three armature coils are arranged at equal intervals.

The commutator 12 includes six commutator pieces 12-1. ....

12-6 and 4). The wiring method in Figure 9 is as follows:
A delta connection is used, and one end of the armature coil 5-1 is connected to the commutator piece 12-1 and the other end of the armature coil 5-2. The other end of the armature coil 5-1 is connected to the commutator piece 12-2 and one end of the armature coil 5-3. One end of the armature coil 5-2 is connected to the commutator piece 12-3 and the other end of the armature coil 5-3. Commutator pieces 12-1 and 12-4.12-2 and 12-5.12-6
and 12-6 are connected. The brush 18-1 connected to the positive power supply 17-1 is connected to the commutator piece 12. -2, the brush 18-2 connected to the negative side power supply 17-2 is in sliding contact with the commutator piece 12-3. In FIG. 9, armature coil 5-1. ....

The group 5-3 is energized in the direction of the arrow to obtain rotational torque in the direction of the arrow F, and the rotary fan 3 having the rotor armature 6 rotates in the direction of the arrow F.

In the above example, the present invention is applied to the disk-type foil flow fan E-2, but it is also applicable to the disk-type or cup-shaped glassless fan E-9'p, commutator e-type. There is.

It is also applicable to iron core type e-tubers.

In the above example, the yokes such as the stator yoke or rotor yoke are formed by plastic injection molding, and then the yokes are integrally formed when the casing and rotating fan are formed by plastic injection molding. Needless to say, it is good depending on the order.

In any case, as is clear from the above disc-type commutator fan to which the present invention is applied, the stator yoke and the casing or the stay integrated with the casing, the rotor yoke and the rotary fan, and the yoke and predetermined Since the parts are integrated by plastic injection molding and each part can be easily formed by plastic injection molding, the trouble of attaching them separately can be saved, and the assembly time can be greatly reduced. It also has the effect of making mass production of data extremely easy. Since the stator yoke and the rotor yoke are made of plastic containing iron powder, iron loss is reduced, which has the effect of providing efficient e-coupling. Yet again. Since the yoke, casing, and rotary fan can be formed using inexpensive plastic as the main raw material, the yoke, casing, and rotary fan can be formed in various shapes very easily, lightweight, and at a very low cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a disc-type commutator fan E-2 as an example of the present invention, Fig. 2 is a perspective view of the casing of the disc-type commutator fan E-2, and Fig. 3 is a rotary fan. A perspective view, FIGS. 4 to 6 are principle explanatory diagrams of a plastic injection molding method for integrally forming a stator yoke and a casing, FIG. 7 is a plan view of a field magnet, and FIG. 8 is an electric machine. FIG. 9 is a bottom view of the rotor armature consisting of the child coil group, and is a developed view of the field magnet and the rotor armature. DESCRIPTION OF SYMBOLS 1... Disk type commutator fan e-type, 2... Casing, 6... Rotating fan, 4... Field magnet, 5... Armature coil, 6... Rotor armature, 7.
... Stator yoke, 8 ... Stay, 9 ... Air passage hole, 10 ... Fixed shaft, 11 ... Plus deck ring, 12 ... Rectifier, 16 ... Brush, 14
...Concave portion, 15...Bearing housing that also serves as a bearing%
16... Rotor yoke, 18... Upper die, 19.2
1...Injection hole, 20.22...Lower mold/patent applicant Figure 1 Figure 5 Figure 'l-Figure S

Claims (1)

[Claims] 1. Either a yoke made of plastic containing iron powder formed into a predetermined shape by injection molding or a member made of plastic containing no iron powder formed into a predetermined shape by injection molding. An e-tater characterized in that it is integrally formed by injection molding a plastic and then injection molding the other plastic. 2. The e-tar according to claim 1, wherein the plastic not containing iron powder forms the casing of the 6-ta. 3. The multimeter according to claim 2, wherein the casing also has a stay integrally formed therein. 4. The device according to claim 1, wherein the plastic not containing iron powder forms a rotating fan. 5. The computer according to any one of claims 1 to 4, wherein the e-event is a fan e-event.