JPS6328249A - Manufacture of stator - Google Patents

Abstract

PURPOSE:To obviate binding of a coil by a binding string, by a method wherein binding of an enamel wire bundle of an annular coil is performed by spot adhering of a rapid hardening resin liquid. CONSTITUTION:To a cylindrical core 1 with slots 4 formed at prescribed intervals in an circumferential surface, an annular coil 2 formed by enamel binding is arranged so that end portion,is disposed in the slot 4 jumped by one. In order to improve the close contact state between enamel wires of each annular coil 2, the core 1 with each coil installed is applied to a coil forming machine thereby the enamel wire bundle is tightened. In this state, a rapid hardening resin liquid is spot adhered to a coil end of each coil thereby the enamel wire bundle of each coil 2 is bound. Finally, the bound annular coil 2 together with the core 1 is immersed in coil impregnation varnish thereby the enamel wire bundle in each coil 2 is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a stator in a motor.

[Conventional technology]

Generally, the stator of a small motor has a structure as shown in FIG. In the figure °(, l is a cylindrical iron core,
2 is an annular coil made of an enamelled wire bundle attached to the iron core 1; 3 is a tie string made of kite string or the like for tying the annular coil 2; 4 is a cylindrical iron core for attaching and fixing the annular coil 2. This is a slot (groove) formed on the inner circumferential surface of 1. This type of stator is manufactured as follows.

That is, first, as shown in FIG. 8, the annular coil 2 made of the enamelled wire bundle shown in FIG. Slot 4 with one end side through slot cover 5
(see Figure 1O), and the other end is placed in another slot 4 one space away from the other end. In this way, a plurality of original coils 2 are attached to the cylindrical iron core 1 with their ends overlapping each other. Next, in order to improve the adhesion between the enameled wires of each annular coil 2, the iron core 1 to which each coil is attached is placed in a coil forming machine (not shown) to compact the enameled wire bundle. Then, in this state, the annular coil 2 is tightly bound using the tie string 3. Next, the annular coils 2 bound together with the tie strings 3 are immersed together with the iron core 1 in a coil-impregnated alligator tube to fix the enameled wire bundle in each coil 2. A stator is manufactured through such a series of steps. In the above process, the purpose of tightly binding the annular coil 2 with the tie string 3 is to prevent the enameled wire being bundled from lifting up due to springback after the enameled wire bundle is compacted by the preceding coil forming. In other words, if such floating lines occur due to springback, the floating lines will not be fixed even in the subsequent process or by impregnation with varnish, and as a result, the stator with such floating lines will not be attached to the motor and rotated. This is because when driven, the floating wire portion vibrates, producing a humming sound and at the same time, the vibration causes dielectric breakdown of the enameled wire.

[Problem that the invention seeks to solve]

As mentioned above, binding with tie strings has an important purpose, but tying the coils each time with tie strings in the process of stator manufacturing is an extremely complicated work. Elimination is desperately needed.

The present invention was made in view of the above circumstances, and its purpose is to eliminate the binding and tying process using tie strings.

[Means for solving problems]

In order to achieve the above object, the present invention includes a step of arranging a plurality of annular coils made of enamelled wire bundles along the inner peripheral surface of a cylindrical iron core, A forming step of compacting the bundle, a step of maintaining the compacted state of the enameled wire bundle that has been compacted, and a step of impregnating and curing the entire enameled wire bundle in the compacted state with a 21-il impregnated varnish, The compacted state of the enameled wire bundle is maintained by dotting the fast-curing resin liquid.

However, in order to eliminate the above-mentioned bonding and binding process using tie strings, the present inventors researched binding with tape or other methods instead of tie strings, and as a result, the present inventors found that We discovered that when a particularly fast-curing resin liquid is dripped with a dispenser or the like, the bundle of wires can be instantly bound, and that the enameled wire bundle of the circular coil can be better bound in place of binding with a tie string, and this invention has been achieved. did.

The fast-curing resin liquid used in this invention includes a polymer or oligomer having an unsaturated group such as epoxy acrylate, urethane acrylate, unsaturated polyester, or polybutadiene, a photocuring agent such as hengeine ethers, henzyl dimethyl ketal, etc. Examples include resin liquids of photocurable resins containing acrylic monomers and reactive diluents having unsaturated groups such as styrene and vinyltoluene. In addition, in place of the photocuring agent of the above-mentioned photocurable resin, we also offer thermosetting resin liquids containing peroxides such as hensyl peroxide and methyl emerketone peroxide, and other types of light! Examples include solutions of formulations using a curing agent and a thermosetting agent in combination. Further examples include liquid epoxy resins made by mixing liquid epoxy resins with polyfunctional polyamines and imidazoles, and liquid urethane resins made by mixing liquid polyether polyols and polyisocyanates.

In addition, the resin liquid of the above resin may contain curing accelerators such as metal soaps such as cobalt naphthenate, iron oxide,
Calcilla carbonate for adjusting the viscosity of coloring pigments such as carbon and liquid resins 1. Inorganic powders such as silica and alumina are added and blended.

Next, examples will be described.

[Example 1] A resin liquid having the following composition was prepared as a fast-curing resin liquid.

(Resin formulation) (Parts by weight) Epoxy acrylate 1- (acrylate ratio equivalent to Epicoat 828 manufactured by Shell Chemical Co., Ltd.) 80 Butyl acrylate 10 Styrene 10 Benzyl dimethyl ketal 2 Benzoyl peroxide 2 Cobalt naphthenate
0.3 Next, arrange the annular coil in the slot of the cylindrical iron core according to the usual method, and use a dispenser to pot one drop of the above resin liquid onto the coil end of each coil after coil forming, and immediately UV irradiation was performed for 1 minute from a distance of 1Qcm using an IKw high-pressure mercury lamp, and then
The resin liquid was cured by heating at 00°C for 10 minutes. The stator thus obtained is shown in FIG.

In the figure, reference numeral 7 denotes a cured resin mass, by which the enamelled wires of each coil 2 are bound.

In addition, when binding the coil 2 with resin, as shown in FIG. The enameled lead wire 8 can be fixed very easily by dispensing one drop of the resin with a dispenser and curing it in the same manner as the resin fixing of the enameled wire of the coil 2. Conventionally, such an enamel lead wire 8 was fixed to the coil end portion with a tying string, and the tying work was extremely complicated. However, according to the present invention, the enamel lead wire 8 is fixed to the coil end portion with a tying cord. This can be done by botting curing, making the work easier. and,"
Even if the enameled lead wire 8 fixed as described in 1 is pulled in the direction of 90° bending from the fixed part, it will break from the enameled wire (0, 26*mφ) itself, but will not break from the fixed part. However, the fixed part remained fixed.

[Example 2] In place of the resin used in Example 1, a resin liquid having the following composition was used.

(Resin composition) (!lj
! ft part) Epoxy resin (equivalent to Epicote 828, manufactured by Shell Chemical Co., Ltd.) 50 Imidazuru IB2MZ (manufactured by Shikoku Kasei Co., Ltd.) 1.5 Calcium carbonate powder 50 On the other hand, as shown in Fig. 3, inside the cylindrical iron core 1 A plastic cylindrical body 10 having a coil winding part 9 is disposed, and a stator is prepared in which a coil 2 made of an enameled wire bundle is wound around the coil winding part 9, as shown in FIG. After compacting the enameled wire bundle of this stator by coil forming,
One drop of the above-mentioned fast-curing resin was dropped onto the coil end using a dispenser, heated at 100° C. for 10 minutes, and bound with a cured resin mass 7. At the same time, as shown in FIG. 5, a lead wire 8 made of a vinyl lead wire was fixed to the coil end through an insulating sleeve 10' by dripping and fixing the resin. 11 is a cured resin lump. As a result of incorporating the thus obtained stator into a motor and driving it, excellent effects similar to those of Example 1 were obtained.

The stator shown in FIG. 3 has a connector part 12 on the outside of the plastic cylindrical body 10, and the coil terminal 2a is attached to the connector part 12 as shown in FIG.
This has the advantage that wiring can be easily connected by pulling out the pin 1 and placing the lead cotton 2b on top of the connector part 12. In FIG. 6, 13 is a rapidly curing resin block cured product.

[Example 3] A fast-curing resin having the following composition was used.

(Resin formulation><ltj
Quantity part) Trimethylolpropane tolylene diisocyanate I/I; 1 additive (Coronate L
, F1 manufactured by Polyurethane Co., Ltd.) 35 Polypropylene glycol (Molecular product approx. 1000) 15 Silica powder 50 Carbon 0.1 Imidadur l
r12MZ O,3 A stator was obtained in the same manner as in Example 1 except for the above. As in Example 1, the obtained stator exhibited excellent performance.

〔Effect of the invention〕

This invention manufactures the stator in the following manner, which eliminates the need for binding the coils with conventional tie strings.
It will also become possible to realize unmanned technology.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is an explanatory diagram of the fixed state of the lead wire, Fig. 3 is a perspective view of another embodiment, and Fig. 4 is a vertical sectional view of the main part thereof. , Fig. 5 is an explanatory diagram of the fixed state of the lead wire, Fig. 6 is an explanatory diagram of the connected state of the lead wire, Fig. 7 is a perspective view of the conventional example, Fig. 8 is a plan view of the iron core used therein, FIG. 9 is a plan view of a coil used therein, and FIG. 10 is a horizontal cross-sectional view of a main part showing a state in which the coil is disposed in the slot of the iron core of FIG. 8. I... Cylindrical iron core 2... Annular coil 4... Slot 7... Cured resin mass Fig. 3 1110' Fig. 4) - Skewer Fig. 5

Claims (3)

[Claims] (1) a step of arranging a plurality of annular coils made of enameled wire bundles along the inner peripheral surface of a cylindrical iron core; a forming step of compacting the enameled wire bundles in the annular coils;
A step of maintaining the compacted state of the compacted enameled wire bundle, and a step of impregnating and curing the entire enameled wire bundle in the compacted state with a coil impregnating varnish, and maintaining the compacted state of the enameled wire bundle. A method for manufacturing a stator, characterized in that it is performed by dotting a fast-curing resin liquid. (2) The method for manufacturing a stator according to claim 1, wherein the connection of the lead wires of the coils is performed using dotting of a quick-curing resin liquid. (3) The method for manufacturing a stator according to claim 1 or 2, wherein the fast-curing resin liquid is a resin liquid of an ultraviolet curable resin.