JPH02267826A - vacuum contactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a vacuum contactor.

[Conventional technology]

The structure of a vacuum contactor used in a conventional vacuum electromagnetic contactor is disclosed in Japanese Utility Model Application Publication No. 56-50034.

This will be explained with reference to FIG. 1 is a molded insulating frame with an open front surface; 2 is a vacuum valve whose upper end is attached to a fixed terminal 3 by a fastening member 24;
, 20b. One end of a lead wire 7 is fastened to the movable lead 5 at the lower end of the vacuum valve 2 by an adjustment nut 8 and an energizing nut 6, the other end of the lead wire 7 is engaged with the movable side terminal 4, and the fastening member 21 is fixed to an insulating frame. An insulating rod 9 is connected to the lower end of the adjusting nut 8 and has a drive rod 9a on its extension. A wipe spring 10 is attached to the drive rod 9a. The wipe spring receiver 11 is loosely inserted, and the operating lever 12 is also loosely inserted. A fastening member 23 is attached to the seat plate 1 at the lower end of the drive rod 9a.
7 is installed. The main circuit and contact mechanism portion are the following members excluding the insulating frame 1. The drive mechanism part is an electromagnet 16. It is comprised of a rotating shaft 13 rotatably supported by a cutoff spring 15 and a bearing (not shown) attached to an insulating frame, and a movable iron piece 14 engaged with the rotating shaft 13. The ITJ operation lever 12 is fixedly attached to the rotating shaft 13 by a fastening member 22.

[Problem to be solved by the invention]

The above conventional technology has the following problems.

(1) The open surface of the insulating frame 1 is the front side, the rotation shaft 13 is arranged on the open surface side, and the fixed side terminal 3
is attached to the upper surface 1a of the insulating frame,
The main circuit and contact mechanism part does not include the adjustment nut 8,
Each part placed above it or its assembly and each part placed below it including the adjustment nut 8 or its assembly are individually assembled into the insulating frame 1, and then the adjusting nut 1- 8, it is necessary to adjust the separation distance between the fixed electrode 2a and the movable electrode 2b in the vacuum valve 2 and the amount of wiping, which requires adjustment in a narrow space surrounded by the mutual barrier of the insulating frame 1, making the work difficult. Sex was difficult.

(2) Since the fastening members 20a, 20b, and 22 are attached when the main circuit and the contact mechanism portion are assembled into the insulating frame, work reliability is low due to falling of these fastening members during the installation work.

(3) Since the fixed side terminal 3, which is a high-voltage charging part, and the vacuum valve fastening member 24 are exposed at the upper front of the vacuum electromagnetic contactor, insulation that can withstand the necessary commercial frequency withstand voltage and lightning impulse withstand voltage is required. A large space distance was required at the front and top of the vacuum electromagnetic contactor, and conductors other than those in phase could not be placed in this area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vacuum contactor that facilitates the integration of a vacuum valve into an insulating frame.

[Means to solve the problem]

The vacuum contactor of the present invention has an insulating frame with an open end on one side, and a vacuum valve is housed in a storage chamber planned for each phase with an insulating barrier, and a rod is drawn out from the vacuum valve from an electrode inside the vacuum valve. , - In a device in which an insulating rod provided on the right side rod is moved to open and close a contact, and the current from the contact is led to the outside from a lead-out terminal provided on the rod, a support portion protruding from the open end is provided in each of the storage chambers. A slit is formed at the tip of the support part, and when storing each vacuum bulb in the storage chamber, the fixing part and insulating rod provided on the pull-out terminal are moved within the slit, and the pull-out terminal is inserted between the fixing part and the support part. The purpose is to fix the insulating rod and to allow the insulating rod to be inserted loosely within the slit.

[Effect]

This vacuum valve can now be assembled into an insulating frame with the extraction terminal and insulating rod assembled, making the assembly process easier and significantly improving the assembly process.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 denotes an insulating frame, which has an open opening at one end from which the vacuum valve 2 can be pulled out, and an insulating barrier IB extending to this open end.
is attached to the insulating frame to create a three-phase vacuum valve storage chamber I.
form C. Further, the insulating frame 1 within the storage chamber IC forms a support portion ID protruding toward the open end. 3 and 4 are fixed side terminals and movable side terminals attached to the vacuum valve 2, 5 is a movable lead wire, 7 is a lead wire, 9 is an insulating rod, and these main circuit parts except the insulating frame 1 are A fastening member 24 provided on the terminals 3 and 4 as shown in the figure
．． 25, but at this point the insulating rod 9
By adjusting the rotation of the drive rod 9 from the top surface of the fixed terminal 3.
The dimension 26 up to the top surface of the seat portion 9b of a is managed. This dimension 26 influences the separation distance and wipe amount of the fixed and movable electrodes 2a and 2b when the moving distance of the operating lever 12 at the axial center position of the drive rod 9a is determined. Control determines the separation distance and wipe amount.

Next, as shown in FIG.
a, and fit the lower end seat of the wipe spring 10 into the wipe spring support convex part 11a of the wipe spring holder part 11, and the U-shaped opening part 11 provided in the wipe spring holder part 11,
After loosely inserting the drive rod 9a into the U-shaped notch 12a of the operating lever 12, the cylindrical projection 11c of the wipe spring receiver 11 is loosely inserted into the hole 12b of the operating lever 12.

Also, fastening members 20a, 20b, 21a, 21b.

22 are fixed side terminals 3. Movable side terminal 4 and rotating shaft 1
3, and the main circuit and contact mechanism assembly are assembled from the open end of the insulating frame 1. In this case, the fastening positions of the insulating array 1 and the operating lever 12 each have a U-shaped slit la.
, lb, and 12c are provided, and the slits la and lb are the support part 1.
It is formed at the tip of c. 12c is formed on the operating lever 12. By simply sliding the main circuit and contact mechanism assembly from one direction, the fastening member 2
0a, 20b, 21a, 21b, and 22 are loosely inserted into U-shaped slits la, lb, and 12c.

Further, by fitting the cylindrical projection 12d provided on the operating lever 12 into the hole 13a provided on the rotation shaft 13, the operating lever 12 is prevented from bending and the fastening member 22 is prevented from rotating. In addition, FIG. 2 shows a movable iron piece 14 which is a drive mechanism part.
Electromagnet 16. Although the cutoff spring 15 is not shown, even when the main circuit and the contact mechanism assembly are assembled into the insulating frame 1 with the cutoff spring 15 attached, the rotation shaft 13
Since these are placed on the front side, they do not pose an obstacle.

Further, as shown in FIG. 2, the fastening member 24 of the vacuum valve 2
The front part of the fixed side terminal 3 including Preventing the decline.

As described above, according to the embodiment of the present invention, there is no need to fix the main circuit and the contact mechanism part in a narrow space after incorporating the insulating frame, and there is no need to adjust the separation distance and wipe amount of the movable electrode.
There is no falling of fastening members, and work efficiency can be improved. Also,
As shown in Figure 1, the insulation space distance in front of the vacuum contactor can be made zero, and the insulation space distance from the front can also be taken into consideration from the position of the fastening member 20a, and the insulation space on the front side of this can be reduced to zero. The distance can be reduced.

〔Effect of the invention〕

According to the present invention, there is no need to fix the movable electrode in a narrow space, there is no need to adjust the separation distance of the movable electrode, and there is no need to adjust the wipe amount, and there is no need for the fastening member to fall into a narrow gap, which significantly improves work efficiency and improves work reliability. can improve sex. In addition, there is no need for space insulation, which was required at the front of the vacuum contactor in the conventional technology, and the space insulation range at the top can be greatly reduced, and the peripheral equipment of the vacuum contactor can be placed in this reduced range. By doing so, the packaging density of the system including the vacuum contactor can be increased.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main parts of a vacuum contactor shown as an embodiment of the present invention, Fig. 2 is a vertical sectional view of the vacuum contactor having the main parts shown in Fig. 1, and Fig. 3 1 is a longitudinal cross-sectional view of a conventional vacuum contactor. 1...Mold insulation frame, 2...Vacuum valve, 3
...Fixed side terminal, 4...Movable side terminal, 9...Insulating rod, 10...Wipe spring, 11...Wipe spring receiver, 12 Dormitory ■ 3, φ...Handede...Snake Waste rod skewer Z mouth

Claims (1)

[Claims] 1. Using an insulating frame with an open end on one side as an insulating barrier, the vacuum valve was stored in a storage chamber planned for each phase, and a rod was pulled out from the vacuum valve from the contact point inside the vacuum valve, and installed on the rod on one side. A contact is opened by an insulating rod, and a current is drawn out from the contact by a draw-out terminal provided on the rod, in which each of the storage chambers is provided with a support portion protruding toward the open end side, and a slit is formed at the tip of the support portion, When storing each vacuum valve in the storage chamber, move the fixed part and insulating rod provided on the drawer terminal within the slit, fix the drawer terminal between the fixed part and the support part, and allow the insulating rod to play freely in the slit. A vacuum contactor characterized by being inserted.