JPS64683Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stroke adjustment mechanism for a movable iron plate in an electromagnetic contactor.

In an electromagnetic contactor, it is necessary to adjust the stroke of the movable iron plate in order to adjust the contact pressure of the electrodes, the space between the fixed electrode and the movable electrode, etc. to appropriate values. In order to facilitate this adjustment, a movable iron plate stroke adjustment mechanism as shown in FIG. 1 has conventionally been used.

Fig. 1 is a partially cutaway front view of the electromagnetic contactor having the stroke adjustment mechanism, and 1 shown in the figure is the main circuit charging section, which is composed of a vacuum valve, movable electrode, fixed electrode, etc. (not shown). . Reference numeral 2 denotes a movable iron plate fixed to a rotating shaft (not shown), and has a hole 2' bored in one end. Reference numeral 3 denotes a threaded rod, one end of which is fixed to the side wall of the mounting frame 4 with a nut 5, and the other end screwed into a yoke 6 fixed to the side wall of the mounting frame 4 facing the side wall. A spring 7 is provided between the yoke 6 and the movable iron plate 2 in pressure contact with the threaded rod 3 as a spring guide. A stopper 8 is fixed to an arbitrary position of the threaded rod 3 with a nut 9. A coil 10 is fixed between the yoke 6 and the armature 11.

In the above configuration, when the coil 10 is energized, one end of the movable iron plate 2 compresses the spring 7 and is attracted to the armature 11, and at the same time, the movable electrode and the fixed electrode (not shown) come into contact with each other due to a known action, as shown in FIG. The electromagnetic contactor is in the closed state. Further, when the coil 10 is deenergized, the movable iron plate 2 which was attracted to the armature 11 is moved to the stopper 8 by the opening force of the spring 7.
direction and is latched onto this stopper 8. At the same time, a movable electrode (not shown) and a fixed electrode are separated by a known action, and the electromagnetic contactor becomes open.
By the way, if you want to adjust the operating stroke of the movable iron plate 2, that is, the distance from the position where it is attracted to the armature 11 to the position where it is latched to the stopper 8, loosen the nut 9 and move the stopper 8 to any position on the left or right. It is sufficient to move the stopper 8 and fix the stopper 8 again with the nut 9.

However, in the conventional operating stroke adjustment mechanism of the movable steel plate in the electromagnetic contactor described above, the mounting frame surrounds the entire electromagnetic contactor, so the stroke motion of the movable steel plate cannot be observed from the outside. Furthermore, when adjusting the operating stroke of the movable iron plate, the mounting frame becomes an obstacle, making it difficult to move the stopper and making it difficult to adjust the stroke.

This invention was made to eliminate the above-mentioned drawbacks, and by removing a part of the mounting frame, the movable steel plate can be observed from the outside, and the operating stroke of the movable steel plate can be easily adjusted. It is.

Next, an embodiment according to the present invention will be described based on FIGS. 2, 3, and 4.

FIGS. 2, 3, and 4 are views showing one embodiment of the operating stroke adjustment mechanism for a movable steel plate according to the present invention, and are respectively a partially cutaway front view and a perspective view of the main parts of an electromagnetic contactor having the mechanism. FIG. 2 is a plan view of main parts.

In the figure, 12 is a main circuit charging section, which is composed of a vacuum valve, a movable electrode, a fixed electrode, etc. (not shown). 1
3 is a movable iron plate fixed to a rotating shaft (not shown), and a hole 13' is bored at one end. Reference numeral 14 denotes a bolt, and as shown in FIG.
The threaded portion 4a is screwed into the yoke 6 fixed to the side wall of the mounting frame 15. A spring 16 is provided between the yoke 6 and the movable iron plate 13 in pressure contact with the neck 14a of the bolt 14 as a spring guide. 17 is a support,
U-shaped portion 1 that prevents rotation of the head 14b
7a and a hole 17b through which the fitting portion 14C is passed.
It has a mounting frame 15 with screws 18, etc.
The fitting part 14 is fixed at an arbitrary position on the bottom of the
One end of the bolt 14 is supported by fitting the bolt C into the hole 17b.

In the above configuration, when the coil 10 is energized, one end of the movable iron plate 13 compresses the spring 16 and is attracted to the armature 11, and at the same time, the movable electrode and the fixed electrode (not shown) come into contact with each other due to a known action, as shown in FIG. The electromagnetic contactor is in the closed state. Also coil 1
0 is deenergized, the movable iron plate 13, which was attracted to the armature 11, is pushed toward the head 14b of the bolt 14 by the opening force of the spring 16, and the head 14b
serves as a stopper and is hung on this head 14b. At the same time, a movable electrode (not shown) and a fixed electrode are separated by a known action, and the electromagnetic contactor becomes open. By the way, if you want to adjust the operating stroke of the movable iron plate 13, that is, the distance from the position where it is attracted to the armature 11 to the position where it is latched to the head 14b, remove the support 17,
Turn the head 14b and tighten the neck 14a of the bolt 14.
If the length of the portion screwed into the yoke 6 of the head 14b is changed, the position of the head 14b will move accordingly. When the head 14b is at an arbitrary position, the support 17 is again fixed to the mounting frame 15, and the fitting portion 14C of the bolt 14 is connected to the support 17.
It is only necessary to fit the hole 17b in the hole 17b.

As described above, according to the present invention, one end of the bolt is supported by a support that prevents the bolt from rotating, so one side wall of the mounting frame is not required to support one end of the threaded rod, which was required in the past. gone,
By removing this wall, it is now possible to observe the movement of the movable steel plate from the outside, and since there is no wall, it is easier to move the stopper (the head of the bolt in this example), making it easier to move than before. It has become easier to adjust the operating stroke of the movable iron plate.

Although the above embodiments have described an electromagnetic contactor having a vacuum valve, the present invention can be applied to any electromagnetic contactor, disconnector, etc. with the same configuration and effect.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view of an electromagnetic contactor using a conventional movable iron plate operation stroke adjustment mechanism, and Figure 2
The figure is a partially cutaway front view of an electromagnetic contactor using the movable iron plate operation stroke adjustment mechanism according to the present invention.
The figure is a perspective view of the main parts of the movable iron plate operation stroke adjustment mechanism according to the present invention, and FIG. 4 is a front view of the bolt according to the present invention. 6... Yoke, 13... Movable steel plate, 14... Bolt, 14a... Neck, 14b... Head, 14C
... Fitting portion, 15 ... Mounting frame, 17 ... Supporting tool, 17a ... U-shaped part, 17a ... Hole.

Claims (1)

[Scope of utility model registration request] In an electromagnetic contactor, the neck part is attached to a yoke fixed to a side wall of a mounting frame, which is composed of a neck part having a threaded part, a head part that serves as a stopper for a movable iron plate of the electromagnetic contactor, and a fitting part, and has only one side wall. a bolt into which the bolt is screwed; a support that is fixed to an arbitrary position on the bottom of the mounting frame; A movable iron plate stroke adjustment mechanism for an electromagnetic contactor, characterized in that it has the following.