JPH07124507A - Masking for impregnation work - Google Patents

Abstract

PURPOSE:To easily prevent impregnation liquid from spreading outside an area to be impregnated by a method in which a balloon is inflated in masking for impregnation work to fix the iron core and coil of a motor so that the inside of the iron core and the inside of a coil holding plate, etc., are covered by the balloon. CONSTITUTION:In the stator of a motor, a laminate iron core 2 is held in a frame 1, a coil 3 is placed in a channel, and the movement of the coil is prevented by a holding plate 4. In masking, a core metal 7 is placed on the inside of the iron core concentrically, and a balloon 5 is inserted on its periphery. When the balloon is inflated, a holding lid 8 which prevents the balloon 5 from expanding outside is fixed on both sides of the core metal 7. The balloon 5 which is inflated by compressed air from an air supply port 6 is contacted closely with the inside of the iron core 2, the inside of the coil holding plate 4, and the inside of the channel 2a, and impregnation is carried out in an impregnation tank in this state. After the impregnation, the balloon 5 is deflated, and the holding lid 8 is removed to take out the balloon 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to masking of impregnation work performed for fixing an iron core of an electric motor or the like and a coil inserted therein.

[0002]

2. Description of the Related Art Conventionally, in the impregnation work, after mounting an iron core and a coil on a frame of an electric motor or the like, the frame is placed in an impregnation tank, and the whole is immersed in an impregnating liquid for a certain period of time and then dried.

[0003]

Since the entire frame is put in the tank and impregnated, the impregnating liquid uniformly adheres to places where it is desired and where it is not desired. For this reason, the impregnating material (fixed) at the places that should not adhere after the impregnation work is removed. Since much time is spent for this removal work, improvement is desired.

Therefore, an object of the present invention is to provide a masking which prevents the impregnating liquid from adhering to a region other than the region to be impregnated and reduces the removal work.

[0005]

The masking for the impregnating work of the present invention is made by inserting a rubber or the like so as to intervene in the gap between the inner surface of the iron core, which is an area not to be impregnated, and the cored bar concentrically placed on the iron core. A balloon made of an elastic material and having an air supply port, a disk-shaped pressing lid which is covered on both end surfaces of the iron core so as to press the bulging of the balloon and is screwed to the core metal at a central portion, A balloon for supplying gas of a predetermined pressure to the balloon, and a masking member made of an elastic material containing bubbles and inserted into contact with the inner surface of the iron core, which is a region not to be impregnated, into a cylindrical shape. A cylindrical ridge opposed to the inner surface of the masking member with a gap therebetween, divided into three equal parts at axial cuts, and extending on the outer peripheral surface in the axial direction corresponding to the plurality of grooves on the inner surface of the iron core. A pusher having a push block and The pressing operation and the radius reduction are performed by moving the three divided bodies of the pusher respectively in the direction of increasing the radius and pressing the masking member against the inner surface of the iron core to bring it into close contact with the inner surface of the iron core, the inner surface of the coil holding plate and the inner surface of the groove of the iron core. And a link mechanism for performing a restoring movement in the direction.

[0006]

In the balloon-type masking according to the present invention, when pressurized gas is supplied to inflate the balloon, the balloon comes into close contact with the inner surface of the iron core, the inner surface of the coil holding plate and the inner surface of the groove of the iron core. In this state, impregnation is performed in an impregnation tank, and after a certain period of time, taken out and dried. After that, the pressurized gas is discharged, the pressing lid is removed, and the core metal and the balloon are taken out. This prevents the impregnating liquid from adhering to the inner surface of the iron core, the inner surface of the coil pressing plate, and the inner surface of the groove of the iron core.

In the link mechanism type masking according to the present invention, the pusher is radially expanded by the link mechanism to bring the masking member into close contact with the inner surface of the iron core, the inner surface of the coil holding plate and the inner surface of the groove of the iron core. At this time, the masking member is more strongly pressed against the groove portion by the pressing block so that the masking member is closely attached so as to fill the groove. Impregnation is performed in this state, and after drying, the pusher is pulled back and loosened by the link mechanism, and then taken out. After that, the masking member in close contact is peeled off and removed. In this way, it is possible to prevent the impregnation liquid from adhering to the inner surface of the iron core, the inner surface of the holding plate and the inner surface of the groove of the iron core.

[0008]

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

FIG. 1 shows masking for the impregnating work according to one embodiment of the present invention. FIG. 2 shows the stator of the impregnated electric motor. The iron core 2 is housed in the frame 1. The iron core 2 is a laminated iron core in which the coil 3 is housed in the groove 2a, and the pressing plate 4 is used to form the coil 3.
Are prevented from moving.

As shown in FIG. 1, an iron core 2 as an object to be impregnated.
A core metal 7 is concentrically arranged on the inner surface of the core, and a thin balloon 5 made of an elastic material such as rubber for closely contacting the inner surface of the iron core 2, the groove 2a and the inner surface of the holding plate 4 is inserted on the outer periphery of the core metal 7, At both ends of the gold 7, a pressing lid 8 for preventing the balloon 5 from bulging to the outside when the balloon 5 is inflated is attached by fixing the central portion with a screw 9.

The balloon 5 is provided with an air supply port 6 and a holding lid 8
Through the hole of (1), is connected to a hose from a pump (not shown), and pressurized air of a predetermined pressure is supplied.

In the masking of the impregnation work of the embodiment of the present invention constructed as described above, the air supply port 6 to the balloon 5 are used.
When pressurized air is supplied to the balloon 5, the balloon 5 swells and comes into close contact with the inner surface of the iron core 2, the inner surface of the coil pressing plate 4 and the inner surface of the groove 2a.

In this state, impregnation is carried out in an impregnation tank, which is taken out after a certain period of time and dried. Thereafter, the pressurized air is released by opening the air supply port 6, the pressing lid 8 is removed, and the cored bar 7 and the balloon 5 are taken out. This can prevent the impregnating liquid from adhering to the inner surface of the iron core 2, the inner surface of the holding plate 4, and the inner surface of the groove 2a. As a result, the work of removing the impregnating material adhering to the place where the impregnation is not desired is eliminated, and the productivity is improved.

Next, another embodiment of the present invention will be described with reference to FIG.
This will be described with reference to (b), (c) and FIG.

As shown in FIG. 3 (b), bubbles 20 are contained inside.
A cylindrical masking member 20 made of an elastic material containing b is inserted in contact with the inner surface of the iron core 2 as shown in FIG. A push metal 21 is arranged so as to face the inner surface of the masking member 20 with a gap. The pusher 21 has a cylindrical shape, and is divided into three equal parts at the axial cuts, and on the outer peripheral surface thereof, there are formed protruding block-shaped push blocks 21a extending in the axial direction corresponding to the plurality of grooves 2a of the iron core 2. . The push block 21a is a masking member 20.
For surely pushing into the groove 2a.

Inside the pusher 21, a link mechanism 30 is provided for pushing and pushing back the pusher 21 in the radial direction. The link mechanism 30 is shown in FIG.
It is configured as shown in. The core rod 22 arranged at the axial position of the pusher 21 has a flange 22a at one end,
The mounting portion 22b for connecting the link to this has a circumferential direction 1
It is provided at intervals of 20 degrees and has a threaded portion on the other end side.

The mandrel 22 has one end seated on the flange 22a, and a return spring 29 is fitted therein. The mandrel 22 is supported by the upper end of the mandrel 22 and the ring 23 is fitted onto the mandrel 22 through a central through hole. Mounting portions 23a for connecting links are provided on the outer circumference of the ring 23 so as to project at intervals of 120 degrees in the circumferential direction.

Mounting portions 24 for connecting links are provided at two upper and lower positions on an axial center line that divides the arc of the inner surface of each of the three-divided pushers 21 into two equal parts.

A block 26 is connected to each of the mounting portions 22b, 23a and 24 by a pin 25, and corresponding blocks 26 and 26 are connected by a connecting rod 27.

A nut 28 is screwed into the threaded portion of the core rod 22. By screwing the nut 28, the ring 23 is pushed down, the core rod 22 is pulled up, and the flange 22a also rises. Then, the three pushers 21 connected by the connecting rod 27 are pushed outward. As a result, as shown in FIG. 4, the masking member 20 is pressed against the inner surface of the iron core 2 by the pusher 21, and the masking member 20 is shown in the groove 2a by the pressing block 21a.
It is pushed while being elastically deformed into the shape of a groove like 0a.

In the masking of the impregnating work of the other embodiment of the present invention having the above-described structure, the masking member 20 is set on the inner surface of the iron core 2 which is the object to be impregnated, and the link mechanism 30 is placed inside the masking member 20. Set concentrically.

By screwing the nut 28 screwed onto the upper portion of the core rod 22, the ring 23 is pushed down, the core rod 22 is pulled down, and the flange 22a also rises. Then, the attachment portions 22b, 23a of the link mechanism 30,
The three pushers 21 connected to the flange 22a of the core rod 22 and the ring 23 by the elements 24, the block 26, the pin 25, and the connecting rod 27 are pushed outward.

By this action, the masking member 20 is pressed against the inner surface of the iron core 2, the inner surface of the holding plate and the inner surface of the groove 2a, and as shown in FIG. 4, the masking member 20 is more strongly pressed by the pressing block 21a, Groove 2
The groove 2a is elastically deformed into the shape of the groove so as to fill the groove 2a.
It is pushed in and adheres to the inner surface of the groove 2a.

The impregnation work is carried out in this state, and after drying, the nut 28 is loosened so that the ring 2 is returned by the return spring 29.
3 ascends, the core rod 22 is lowered, and the flange 2
2a goes down. As a result, the three pushers 21 are pulled back in the radial direction and retracted from the marking member 20. Therefore,
The pressing member 21 is taken out together with the link mechanism 30, and the closely adhered marking member 20 is peeled off and removed. In this way, it is possible to prevent the impregnating liquid from adhering to the inner surface of the iron core 2, the inner surface of the holding plate 4 and the inner surface of the groove 2a. Masking member 20
Since it contains air bubbles, it will be restored when the external pressure is removed and can be used repeatedly.

According to the masking of the impregnating work of the other embodiment of the present invention, the work of removing the impregnating material adhering to the place where the impregnation is not desired is eliminated, and the productivity is improved.

[0026]

As described in detail above, according to the present invention, the air supply port made of an elastic material such as rubber is inserted so as to intervene in the gap between the inner surface of the iron core and the core metal concentrically placed on the iron core. It has a balloon having, a disc-shaped holding lid which is fixed to a core metal by being covered so as to press the bulging of the balloon on both end surfaces of the iron core, and a pump which supplies gas of a predetermined pressure to the balloon. A masking member for impregnation work and a cylindrical masking member that is inserted in contact with the inner surface of the iron core and is made of an elastic material containing air bubbles, and a cylindrical and axial cut that faces the inner surface of the member with a gap. And a pusher having a ridge-shaped push block extending in the axial direction corresponding to the plurality of grooves on the inner surface of the iron core on the outer peripheral surface, and a divided body of the pusher respectively in the radial increasing direction. Move the masking member Masking of the impregnation work, which is equipped with a pressing mechanism that presses against the inner surface of the core and is brought into close contact with the inner surface of the iron core, the inner surface of the coil holding plate, and the inner surface of the groove of the iron core by elastic deformation, and a link mechanism that performs restoration movement in the radius reduction direction. As a result of the realization, the balloon is supplied with pressurized gas to inflate it, or the impregnation work is performed while the pusher is expanded by the link mechanism and the masking member is in close contact with the inner surface of the mandrel. Thus, it is possible to prevent the impregnating liquid from adhering to the inner surface of the iron core, the inner surface of the coil pressing plate, and the inner surface of the groove of the iron core, which are areas not to be impregnated. Therefore, there is no need to remove the impregnating material adhering to the portion that is not desired to be impregnated, and the productivity is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of masking for an impregnation work according to an embodiment of the present invention.

FIG. 2 is a plan view showing a stator of an electric motor which is an object to be impregnated.

3 (a), (b), and (c) show masking of impregnation work of another embodiment of the present invention, and FIG. 3 (a) is a plan view showing a configuration, and FIG. 3) is a cross-sectional view of the masking member in FIG. 3A, and FIG. 3C is FIG.
FIG. 3 is an elevational view showing a pusher and a link mechanism for moving the pusher in FIG.

FIG. 4 is a diagram showing a state in which the masking member in FIG. 3 (a) is in close contact with the core groove portion.

[Explanation of symbols]

 2 ... Iron core 2a ... Groove 3 ... Coil 4 ... Presser plate 5 ... Balloon 6 ... Air supply port 7 ... Core metal 8 ... Presser lid 20 ... Masking member 21 ... Push metal 21a ... Push block 22 ... Core rod 22a ... Flange 22b ... Mounting part 23 ... Ring 23a ... Mounting part 24 ... Mounting part 25 ... Pin 26 ... Block 27 ... Connecting rod 28 ... Nut 29 ... Return spring 30 ... Link mechanism

Claims (3)

[Claims] 1. A balloon made of an elastic material such as rubber, which is inserted so as to intervene in a gap between an inner surface of an iron core, which is a region not to be impregnated, and a core metal concentrically placed on the iron core, and both ends of the iron core. A masking for impregnation work, comprising: a holding lid which is fixed to the core metal so as to cover the balloon on the surface thereof and which is fixed to the core metal; and a pump which supplies gas of a predetermined pressure to the balloon. 2. A masking member which is inserted into contact with an inner surface of an iron core, which is a region which is not desired to be impregnated, and which is formed into a cylindrical shape with an elastic material, and a cylindrical shape which is opposed to the inner surface of this member with a gap in the axial direction. A pusher having a ridge-like push block extending in the axial direction corresponding to a plurality of grooves on the inner surface of the iron core, which is divided into three equal parts at the outer periphery, and a divided body of the pusher respectively in a radius increasing direction. A link mechanism for pressing the masking member against the inner surface of the iron core to elastically deform the inner surface of the iron core, the inner surface of the coil holding plate and the inner surface of the groove of the iron core, and performing a return movement in the direction of decreasing the radius. Masking of impregnation work that consists of. 3. The masking for impregnation work according to claim 2, wherein the masking member is made of an elastic material containing bubbles.