JPS5828725B2 - winding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to a transformer, for example, which comprises an iron core wound with a coil, a base to which the iron core is attached, and a dish-shaped cover having a flange on the periphery that abuts the end surface of the iron core. Regarding winding equipment,
The purpose is to reduce noise caused by vibration.

Noise is a problem in such wire-wound devices, but the true cause has not been investigated and solutions are currently delayed.

In view of the current situation, the present invention has been developed by investigating the cause of noise and taking countermeasures.

The present invention will be explained below according to the embodiments shown in FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a base having a U-shaped cross section with bent portions 1a on both sides, and mounting screws (not shown) for attaching, for example, a lighting equipment main body (not shown) near both ends.
Through holes 2, 2 are bored.

3 has a U-shaped outer iron core 3a and an inner iron core 3b.
It is a character-shaped iron core, and there are recesses 4, 4 at both free ends of the outer iron core part 3a.
have.

5, the horizontal bar part is an outer iron core part 5a, and the vertical bar part is an inner iron core part 5b.
It is a T-shaped iron core consisting of .

A coil 6 is to be wound around the inner iron core portion 3b and the inner iron core portion 5b via a coil bobbin 7.

Reference numerals 8 and 8 designate a rectangular dish-shaped cover, the periphery of 3 is bent inward to form a flange 9 that abuts the outer iron core 3a, and the remaining periphery of the lower portion is provided with a flange. A notch 10 is provided for the insulating varnish to flow out.

A bent piece 11 having a height of approximately half the depth of the dish-shaped cover 8 is provided around the notch 100, and the above-mentioned U-shaped outer iron core is provided on two sides of the flange 9. There are recesses 12, 12 that match in shape with the recess 4 provided in the outer iron core 3a, and an engaging protrusion 14 on one side of the flange 9 that engages with a locking hole 13 drilled in the outer iron core 3a. In the figure, reference numerals 15 and 15 are terminal plates of the coil 6, with one notch 10 of the dish-shaped cover 8 also being exposed to the outside.

Each element of such a structure is assembled as described above.

First, the coil 6 is inserted into the inner iron core part 3b of the E-shaped iron core 3, and then the inner iron core part 5b of the T-shaped iron core 5 is inserted into the coil 6, and the T-shaped iron core 5 By inserting both ends of the outer iron core portion 5a between the E-shaped openings of the E-shaped iron core 3, a substantially Japanese-shaped iron core block 16 with a coil 6 is formed.

Next, the flange part 9 of the dish-shaped cover 8 is brought into contact with both surfaces of the iron core Glock 16, and the engaging protrusion 14 of the dish-shaped cover 8 is attached to the outer iron core part 3.
a, and engage the locking hole 13 drilled in the iron core block 1.
6 and the plate-shaped covers 8, 8 are placed on the base 1, and the bent portion 1a of the base 10 is caulked into the recess 4 of the E-shaped iron core 3 and the recess 12 of the plate-shaped cover 8, the iron core block 16 is completed. and the dish-shaped cover 8 are both fixed to the base 1.

Then, when the above-mentioned assembly is impregnated with insulating varnish, the insulating varnish is filled into the coil 6 and the inner iron cores 3a and 3b from the notch 10 of one dish-shaped cover 8, and from the notch 10 of the other dish-shaped cover 8. The excess amount is poured out and hardened.

On the other hand, in a conventional winding device to be compared with the present invention, the notch 100 for insulating varnish leakage in the above embodiment is
Generally, the bent piece 11 is not provided on the periphery, but the insulating varnish flows out smoothly from the notch 10, and the thickness of the insulating varnish that solidifies on the dish-shaped cover 8 is thin. Therefore, the rigidity of the plate-shaped cover 8 is low, and the plate-shaped cover 8
As a result of the study, it was found that there is a drawback that the vibration of the iron core block 16 is transmitted and the plate-shaped cover 8 itself tends to vibrate.

However, in the above embodiment, since the bent piece 11 is provided around the notch 10, some amount of the insulating varnish that has descended along the inner surface of the dish-shaped cover 8 is blocked by the bent piece 11. The dish-shaped cover 8 does not flow out from the notch 10
It is stored inside and hardens.

Since the dish-shaped cover 8 is coated with insulating varnish, the dish-shaped cover 8 does not vibrate, thereby reducing noise.

According to experiments, some winding devices using the dish-shaped cover 8 of the present invention in place of the conventional dish-shaped cover 8 have a noise reduction of about 19 dB.

FIG. 5 shows a different embodiment of the present invention, in which a rib 17 is provided on a portion corresponding to the bottom of the dish-shaped cover 8 to aim at a reservoir of insulating varnish and to improve the rigidity of the dish-shaped cover 8 itself. It is better.

As described above, in the winding device of the present invention, a notch for insulating varnish to flow out is formed in the cylindrical part facing the base of the dish-shaped cover, which has a flange on the periphery that contacts the end face of the iron core, and a notch is formed on the periphery of the notch. Since it is characterized by having a bent piece part,
The structure is such that a part of the insulating varnish that fills the coil part in excess of the required amount and flows out of the notch is dammed up by the bent piece and remains and adheres to a part of the corner of the bent piece. The dish-shaped cover, which was a cause of amplifying vibrations and increasing noise, has been significantly increased in rigidity by using both the peripheral flange and the bent pieces that retain insulating varnish in some corners to increase rigidity. This was intended to reduce noise from winding equipment.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
2 is a sectional view along cutting line XX, FIG. 3 is a plan view of the iron core, and FIG. 4 is a plan view of the dish-shaped cover as viewed from arrow A. FIG. 5 shows a different embodiment of the present invention, and is a sectional view of a main part.

Claims (1)

[Claims] 1. In a winding device consisting of an iron core around which a coil is wound, a base to which the iron core is attached, and a dish-shaped cover having a flange on the periphery that comes into contact with the end face of the iron core, the part facing the base of the dish-shaped cover. 1. A winding device characterized in that a notch is formed in the insulating varnish for flowing out, and a bending piece portion formed by bending the peripheral edge inward is provided on the periphery of the notch.