JPS5813010B2 - AC electromagnet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an E-shaped AC electromagnet equipped with a shaded coil.

In AC electromagnets, shade coils are attached to the magnetic pole faces to prevent whirring, but conventional shade coils are fixed by caulking, etc., so they are prone to deformation or breakage due to mechanical impact. There was a problem.

In addition, in AC electromagnets using E-shaped cores or T-shaped cores used in flat electromagnetic relays, it is possible to swage a shaded coil to the tip of the center leg of the E-shaped core or T-shaped core in advance, and then wind the coil later. If the loaded spool cannot be inserted into the middle leg and an E-shaped core is used, the darkening coil cannot be attached until after the middle leg has been inserted into the spool, making the work difficult and increasing the number of man-hours. This is a factor in increasing costs.

In addition, when using a T-shaped core, an AC electromagnet is formed by attaching a shade coil to each flange and inserting the middle leg into the spool, but two shade coils are required, and the flange Two means for fixing the shaded coil to the section are also required, which increases the number of man-hours and results in a relatively expensive AC electromagnet, similar to the one using the E-shaped core described above.

The present invention aims to improve the above-mentioned drawbacks, and provides an AC electromagnet that can extremely easily fix a shade coil without applying any blows, and is easy to assemble without any restrictions on work. purpose.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an E-shaped iron core consisting of a middle leg 2, arms 3 and 4, and a connecting portion 5 that connects these.

The tip of the middle leg 2 is bent at a right angle to form a bent portion 2a.

6 is a plate-shaped iron core with a bent part 6a bent at a right angle at the tip.
The leg portion 6b is superimposed on the middle leg 2 of the E-shaped core 1, and one end thereof is fixed to the connecting portion 5 by means such as spot welding.

An excitation coil 7 is wound around the overlapping portion of the middle leg 2 and the leg portion 6b via a spool 8.

Reference numeral 9 denotes a ring-shaped shading coil, which is clamped between the bent portions 2a and 6a.The end surface 10 of the bent portion 2a and the end surface 11 of the bent portion 6a formed by sandwiching the shading coil 9 are not shown in the figure. Configure the magnetic pole against the movable iron piece.

Next, how to assemble the AC electromagnet having the structure shown in FIG. 1 will be explained with reference to FIG. Then, the plate-shaped iron core 6 with the shaded coil 9 fitted in the leg portion 6b is inserted into the hollow portion 12 from the direction of arrow B.

Then, by spot welding one end of the leg 6b to the connecting part 5 of the E-shaped core 1, the middle leg 2 and the leg 6b are overlapped, and the rounded coil 9 is clamped between the bent parts 2a and 6a. It will be fixed.

FIG. 3 shows another embodiment of the present invention, in which a darkening coil 9 is clamped and fixed between the bent portion 6a of the plate-shaped core 6 and the end surface of the middle leg 2 of the E-shaped core 1. be.

In this case, the bent portion only needs to be provided on the plate-shaped core 6, and there is no need to provide it on the middle leg 2, so there is an advantage that the E-shaped core 1 can be easily processed.

As described above, according to the present invention, there is no need to apply any mechanical impact when fixing the darkening coil, so deformation or breakage of the darkening coil can be prevented. This can be done very easily by inserting and assembling from both sides, resulting in good workability and no restrictions on the work.

Furthermore, since the plate core is superimposed on the center leg of the E-shaped core, the cross-sectional area of the magnetic path in this portion increases, and many excellent effects can be obtained, including the ability to strengthen the attractive force.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is a perspective view showing an embodiment of the invention.
FIG. 3 is an exploded perspective view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... E-shaped iron core, 2... Middle leg, 2a... Bent part, 6... Plate iron core, 6a... Bent part, 9... Drilled coil.

Claims (1)

[Claims] 1. A shade coil is narrowly attached between the tip of the middle leg of the E-shaped core and the bent part provided at the tip of the plate-shaped core superimposed on the middle leg. AC electromagnet. 2. A patent characterized in that the tip of the middle leg of the E-shaped core is bent, and a shaded coil is sandwiched between this bent portion and a bent portion provided on the plate-shaped core. Claim 1
AC electromagnet described in section.