JPS6215956Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum switchgear. A vacuum switchgear generally includes a vacuum interrupter 1 and a vacuum interrupter 1, as shown in the drawings below in Figure 1.
By energizing the operating electromagnet 2 that constitutes the opening/closing operation mechanism of the vacuum interrupter 1, the movable lead portion 1a of the vacuum interrupter 1 is pushed up and
A control lever 3 that brings the electrodes 1b and 1c into contact is provided, and a spring 4 that pushes down the movable lead portion 1a of the vacuum interrupter 1 and brings the electrodes 1b and 1c into a non-contact state when the operating electromagnet 2 is demagnetized. The movable reed portion 1a is pushed up or down by an electromagnet 2, an operating lever 3, and a shingle spring 4 to put it into a so-called closed state or a so-called cut-off state.

By the way, in a conventional vacuum switchgear of this type, one end of the operating lever 3 is connected to the movable lead portion 1a of the vacuum interrupter 1 via an insulating rod 5, as shown in FIGS. 1 and 2, and the other end is used for rotational operation. A so-called rotary operating lever attached to a shaft 6 is used, and the operating electromagnet 2 installed below the insulating rod 5 attracts the movable iron core 7, so that the operating lever is rotated around the rotating operating shaft 6. 3 by a predetermined angle to push up the movable lead portion 1a and bring the electrodes 1b and 1c into contact with each other. In the figure, reference numerals 5a and 5b are connecting pins that protrude from the top and bottom of the insulating rod 5. The upper connecting pin 5a is connected to the movable lead portion 1a of the vacuum interrupter 1 via the sleeve 8, and the lower connecting pin 5a is connected to the movable lead portion 1a of the vacuum interrupter 1 through the sleeve 8. The pin 5b protrudes from the lower surface of the operating lever 3 through a hole 3b provided at the center of the V-shaped curved portion 3a of the operating lever 3, and a washer 9 and a nut for supporting the operating lever 3 are attached to the protruding portion. 10 is installed. A pressure spring 11 is interposed between a spring seat 3c provided on the upper surface of the operating lever 3 and a spring seat 5c provided on the lower surface of the insulating rod 5, and presses the electrodes 1b and 1c in the closed state. , 12 is a metal frame, and 13 is a fixed frame attached to the metal frame 12. The operating electromagnet 2 is attached to the fixed frame 13, and there is a bend between the fixed frame 13 and the movable iron core 7. Spring 4 is attached. 14 is the movable iron core 7
15 is an insulating cover, 16 is a fixed side terminal of the vacuum interrupter 1, and 17 is a movable side terminal.

Since the conventional vacuum switchgear had the above-mentioned configuration, it had the following drawbacks.

(1) Mounting the operating lever 3 requires the rotary operating shaft 6 and the rotating bearing 18 for rotatably supporting the shaft 6, and in order to support the rotating operating shaft 6 in a stable state, at least Both ends of the rotary operation shaft 6 are connected to a pair of left and right rotary bearings 18, 18.
Since the structure must be supported by a large number of parts, the number of parts increases and the structure becomes complicated.

(2) Attaching the rotary operation shaft 6 to the rotary bearings 18, 18 is troublesome, especially when the metal frame 12 is integrally formed and the rotary bearings 18, 18 are previously attached to the opposing surfaces 12a, 12a. Then, it becomes difficult to insert the end of the rotary operation shaft 6 into these rotary bearings 18, 18.

(3) In order to facilitate the attachment of the rotary operation shaft 6 to the rotary bearings 18, 18, the metal frame 12, especially the surfaces 12a, 1 on which the rotary bearings 18, 18 are attached
It would be possible to have a structure in which the parts 2a are assembled together, but if this is done, a lot of time and effort will be required for assembly and adjustment for assembly.

(4) Also, conventionally, due to its structure, vacuum interrupter 1
Since the insulating rod 5 and the operating electromagnet 2 are placed directly below the device, the height of the device increases.

In the present invention, as shown in FIG. 3 and subsequent drawings, the operating lever 3 has one end connected to the movable lead portion 1a of the vacuum interrupter 1, and the other end connected to the operating rod 2a of the operating electromagnet 2. A V-shaped or semi-circular bearing 19 between one side and the other end.
By using a so-called lever-type operating lever that is supported by a lever, the above-mentioned drawbacks of the conventional method are solved. In the embodiment shown in the drawings, the operating lever 3
As shown in FIG. 6, one end side is provided with a hole 3d, and by inserting the movable lead portion 1a of the vacuum interrupter 1 into the hole 3d and attaching the washer 9 and nut 10 to the tip. One end of the operating lever 3 is attached directly to the movable lead portion 1a of the vacuum interrupter 1 (without intervening the insulating rod 5 as in the conventional case). Further, as shown in FIGS. 7 to 9, the other end side of the operating lever 3 includes a recess 3e having a predetermined length and an arcuate cross section.
A rod receiving hole 3f is provided at approximately the center position in the length direction, and the tip 2b of the operating rod 2a of the operating electromagnet 2 is inserted into the rod receiving hole 3f, and the connecting fitting 2c is attached to the portion 2b. Therefore, the other end of the operating lever 3 is directly attached to the operating rod 2a of the operating electromagnet 2 (without using the movable iron core 7, the rotary operating shaft 6, etc. as in the conventional case). Further, a fulcrum convex portion 3g having a pointed angle θ is provided at an intermediate position between one end side and the other end side of the operating lever 3, as shown in FIGS. It has become increasingly popular. The V-shaped bearing 19 is integrally formed with an insulating frame 20, and a recess 19a having an opening angle α slightly larger than the sharpness angle θ is provided on the upper surface of the V-shaped bearing 19. By fitting, the operating lever 3 is supported by the V-shaped bearing 19 so as to rotate about the fulcrum convex portion 3g. As shown in FIG. 12, the straight springs 4, 4 are connected to the insulating frame 20 and the operating lever by a spring seat 20b provided on the upper surface 20a of the insulating frame 20 and a spring seat 3h provided on the upper surface of the operating lever 3. As shown in FIG. ing. Since the vacuum switchgear of the embodiment has the above-mentioned configuration, when the operating electromagnet 2 is excited and the operating rod 2a is pulled in the direction of arrow a, the operating lever 3 acts as a so-called lever, and the movable reed portion 1a is pulled at the other end. Push up, electrodes 1b, 1c
When the operating electromagnet 2 is demagnetized, the movable reed portion 1 is brought into contact with the
a is pushed down and becomes shriveled.
In the embodiment, the V-shaped bearing 19 is attached to an insulating frame 20.
(The V-shaped bearing 19 is also formed integrally with the insulating frame 20.)
Although the insulating rod 5 can be omitted by forming the insulating rod 5 from the same insulating material as the insulating material, and the device can be made smaller accordingly, it goes without saying that the insulating rod 5 may also be used.

As explained above, the present invention includes the vacuum interrupter 1, the operating electromagnet 2 that constitutes the opening/closing operation mechanism of the vacuum interrupter 1, and the movable lead portion 1a of the vacuum interrupter 1 by energizing the operating electromagnet 2.
an operating lever 3 that pushes up to bring the electrodes 1b, 1c into contact; and a break spring that pushes down the movable lead portion 1a of the vacuum interrupter 1 to bring the electrodes 1b, 1c into a non-contact state when the operating electromagnet 2 is demagnetized. 4, the operating lever 3 is connected at one end to the movable lead portion 1a of the vacuum interrupter 1, and at the other end to the operating rod 2a of the operating electromagnet 2, and between these one end and the other end. This vacuum opening/closing device is characterized in that it is a lever-type operation lever supported by a V-shaped or semicircular bearing 19, so that it has the following effects.

(1) Since the operating lever 3 is a lever type, the rotating operating shaft 6 and rotating bearings 18, 18 as in the past are unnecessary, and so-called mounted bearings such as V-shaped or semicircular arc-shaped bearings can be used as bearings. becomes possible.

(2) By using mounted bearings, it becomes easier to integrate the frame, which was difficult when using conventional rotary bearings. (Unlike when using a rotating bearing, there is no need to insert the end of the rotating operating shaft, and the center of the operating lever 3 is inserted into the bearing 1.
9).

(3) Since the vacuum interrupter 1 and the operating electromagnet 2 can be arranged on both the left and right sides of the bearing 19, the height of the device can be made lower than before, and the height of the device can be lowered than before. This makes it possible to provide sufficient insulation space.

(4) Since the distance l from the bearing 19 (shaft fulcrum) to the point of action of the electromagnet can be freely selected according to the attraction characteristics of the electromagnet 2, the most efficient small electromagnet can be used.

[Brief explanation of the drawing]

Figures 1A and B are a front view and a vertical sectional view of a conventional vacuum switchgear, Figures 2A and B are enlarged views of the main parts of Figures 1A and B, and Figures 3 and below show examples of the present invention. , 3rd
The figure is a front view, Figure 4 is a sectional view, Figure 5 is a rear view,
FIG. 6 is a side view showing how the operating lever is attached to the movable reed, FIG. 7 is a sectional view showing how the operating bar is attached to the operating rod, and FIG. 8 is a side view showing how the operating lever is attached to the operating rod.
9 is a plan view of the same, FIG. 10 is a sectional view showing how the operating lever is attached to the bearing, and FIG.
The figures are a cross-sectional view taken along the line -- in FIG. 10, FIG. 12 is a side view showing the installed state of the edge spring, and FIG. 13 is a cross-sectional view showing the installed state of the pressure spring. 1... Vacuum interrupter, 1a... Movable lead part, 1b, 1c... Electrode, 2... Operating electromagnet, 2
a...Operation, 3...Operation lever, 4...Shining spring, 19...V-shaped bearing.

Claims (1)

[Scope of utility model registration request] The vacuum interrupter 1, the operating electromagnet 2 that constitutes the opening/closing operation mechanism of the vacuum interrupter 1, and the vacuum interrupter 1 by exciting the operating electromagnet 2.
Push up the movable lead part 1a of the electrodes 1b and 1c.
an operating lever 3 that brings the electrodes into contact, and a spring 4 that pushes down the movable lead portion 1a of the vacuum interrupter 1 and brings the electrodes 1b and 1c into a non-contact state when the operating electromagnet 2 is demagnetized. One end of the lever 3 is connected to the movable lead portion 1a of the vacuum interrupter 1, and the other end is connected to the operating rod 2a of the operating electromagnet 2. A vacuum opening/closing device characterized by having a lever-type operating lever supported by a bearing 19 such as the above.