JPS5921491Y2 - Electromagnetic devices for circuit breakers and breakers - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an electromagnetic device for a circuit breaker.

A conventional electromagnetic device for a circuit breaker was constructed as shown in FIG.

That is, in the figure, 1 is an L-shaped yoke fixed to a base 2 by screws 8, 3 is a cylinder body (not shown) in which a movable iron core having an excitation function, a brake fluid, and a brake spring are built in. This cylindrical body has an electromagnetic coil 9 wound around its outside and is fixed to the yoke 2.

4 is a movable iron piece with recesses (not shown) formed at both ends;
This is inserted into the leg portion 1A and is constantly biased clockwise by a tension spring 5.

Reference numeral 6 denotes a latch, which is rotatably supported on the shaft 10 and has a tripping mechanism (
(not shown).

Reference numeral 7 denotes a trip bar that is fitted into the latch 6 and is capable of coming into contact with the movable iron piece 4.

Since the conventional electromagnetic train removal device is configured as described above, screw tightening is required to fix the yoke 1 to the base 2, and work efficiency is particularly high when tightening the screws from the back side of the base 2. Moreover, since the yoke 1 must be provided with a female thread, the unit cost of parts increases and automation is hindered.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and by press-fitting the yoke into the base, the electromagnetic circuit breaker can be easily worked and the parts can be fixed securely. The aim is to provide equipment.

An embodiment of this invention will be described below with reference to FIGS. 2 to 5.

That is, IB is the first plane of the Yoke 1 bent into an L-shape, which is a vertical plane in the up-down direction in FIG.

1C is a second plane perpendicular to the first plane 1B, 1D is a protrusion that is separated by a square hole 1E at both ends of the first plane 1B and extruded in an arch shape, and 1E is one side of the tension spring 5. The first through hole 1G in which the cylinder 3 is locked is the second through hole into which the cylinder 3 is inserted, 1H is a stepped portion formed at the lower part of the first plane 1B, and 2A
is the bottom of a square hole 2B formed in the base 2 into which the protrusion 1D of the yoke 1 is inserted.

Note that the other components are the same as those of the conventional one, so explanations will be omitted.

To assemble the parts configured in this way, first, the combination of the electromagnetic coil 9 and the cylindrical body 3 is inserted into the third through hole 1 of the yoke 1.
At the same time, the cylindrical body 3 and the yoke 1 are individually positioned at predetermined positions.

Next, the concave portions (not shown) at both ends of the movable iron piece 4 are inserted into the foot portions 1A of the yoke 1, and one end of the movable iron piece 4 and the second
The electromagnetic device is assembled by locking both ends of the tension spring 5 to the through hole 1F.

In this way, the protrusion 1D of the yoke 1 of the assembled electromagnetic device is inserted into the square hole 2B of the base 2, and the stepped portion 1 of the yoke 1 is inserted into the square hole 2B of the base 2.
The assembly to the base 2 is completed by bringing the H into contact with the bottom 2A of the square hole 2B, resulting in the configuration shown in FIGS. 2 and 3.

In this case, the dimension A of the protrusion 1D at both ends of the yoke 1 and the base 2
The relationship between A and the dimension B of the square hole 2B is A>B.

Therefore, after the yoke 1 is inserted into the square hole 2B, the electromagnetic device is completely fixed by the elasticity of the protrusion 1D.

FIG. 5 shows another embodiment of this invention.

This is a notch 1K formed in a part of the protrusion 1J of the yoke 1. With this configuration, when the protrusion 1J is inserted into the square hole 2B of the base 2, the protrusion 1J is cut out. The elastic force becomes weaker, making the insertion work easier, and after insertion, the cutout surface 1L of the yoke 1 bites into the side wall of the square hole 2B, so even if a force is applied to the yoke 1 to pull it out, the yoke will not work. The installation state of iron 1 will not become unstable.

Furthermore, by adjusting the width C of the protrusion 1J, the yoke 1 can be adjusted to the base 2.
It has the effect of being able to adjust the insertion force when inserting into the connector and the fixing force after insertion.

As described above, according to this invention, the yoke can be easily fixed by simply inserting it into the base, and it is also possible to adjust the insertion force when inserting the yoke into the base and the fixing force after insertion. Since it can be changed, it has the advantage of preventing damage to the base, simplifying assembly work, and automating assembly at the same time.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional device, Figs. 2 to 4 all show an embodiment of this invention, Fig. 2 is a side view, Fig. 3 is a front view, The figure is a simplified perspective view. FIG. 5 is a perspective view of a yoke showing another embodiment of this invention. In the figure, 1 is a yoke, 1D is a protrusion, 2 is a base, 2B is a square hole, 3 is a cylinder, 4 is a movable iron piece, 5 is a tension spring, 6 is a latch, 7
is a trip bar, and 9 is an electromagnetic coil. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An L-shaped yoke, a cylindrical body fixed to this yoke and containing a member having an excitation function, an electromagnetic coil wound around the outside of this cylindrical body, and a movable iron piece rotatably provided on the yoke. , and a pull spring that biases this movable iron piece,
An electromagnetic device for a circuit breaker, characterized in that an arch-shaped protrusion is provided on a surface of the yoke into which the yoke is fitted into the base, and the yoke is fitted into and elastically fixed to the base.