JPS5914995Y2 - vacuum breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum breaker, and more particularly to a vacuum breaker that improves the connection of a connecting conductor attached to a fixed lead.

As shown in FIG. 1, a conventional vacuum breaker has a connecting conductor 3 that connects a fixed lead 2 and an external circuit (not shown).
It is fitted onto the fixed lead 2 and fixed via a stud bolt embedded in the metal end plate of the vacuum vessel 1, and a ring contact 4 is inserted between the connecting conductor 3 and the fixed lead 2 to make an electrical connection. was.

However, the ring contact 4 has a disadvantage that it has a complicated structure, increases cost, and is large.

In view of the above-mentioned conventional drawbacks, the present invention has a simple structure,
To obtain a vacuum breaker which is easy to install at low cost and which can ensure reliable contact between a fixed lead and a connecting conductor.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 7.

The vacuum breaker according to the present invention has both ends of an insulating cylinder hermetically closed by metal end plates, as well as ordinary ones, and
The contents are evacuated to a high vacuum to form a vacuum container 11, and a pair of electrodes (not shown) are connected to each metal end plate 1 in this vacuum container 11.
A fixed lead 12 and a movable lead (not shown), which form a pair, are introduced from the center of the lead 12 so as to be able to approach and separate from each other relatively.

A contact 15 is attached to the fixed lead 12 led out from the approximate center of the metal end plate 13 to connect the fixed lead 12 to a connection conductor to be described later.

As shown in FIG. 3, the contactor 15 includes a contactor main body 16 which has a conductive cylindrical body with both ends expanded to form a contact portion 15a having an arcuate cross-section and projecting inward approximately in the middle; A flange-shaped terminal portion 1 integrally formed on one end of this contact body 16
7, and the terminal portion 17 is provided with a bolt hole 18 into which a stud bolt 14 implanted in the metal end plate 13 is inserted.

Then, the contactor 15 connects the terminal portion 17 to its bolt hole 18.
The stud bolt 14 is made to protrude from the metal end plate 13, and the contact body 16 is brought into contact with the contact portion 15.
a to the outer peripheral surface of the fixed lead 12, and
It is fitted in 2.

The contactor 15 fitted into the fixed lead 12 has a connecting conductor 1 for connecting the fixed lead 12 and an external circuit (not shown).
9 is fitted through a contact housing recess 22 formed on its negative side, and the end of the fixed lead 12, which is housed in the recess 22 together with the contact 15, passes through the center of the bottom of the recess 22. The lead hole 20 is inserted into the lead hole 20.

A stud bolt 14 is inserted into a bolt hole 21 provided through the body of the connection conductor 19, and a nut 23 screwed into the end of the stud bolt 14 protruding from the bolt hole 21 is used to connect the conductor 19. The conductor 19 is pressed and fixed to the metal end plate 13.

Note that the length of the contact body 16 of the contact 15 is appropriately larger than the depth of the recess 22 so that the contact portion 15 a is pressed against the outer peripheral surface of the fixed lead 12 when the connecting conductor 19 is pressed and fixed. Terminal part 1
7 is interposed between the connecting conductor 19 and the metal end plate 13,
It is pressed against the metal end plate 13 as the connecting conductor 19 is pressed and fixed.

Next, different embodiments of the present invention shown in FIGS. 4 to 7 will be explained.

In the description of these embodiments, parts that are considered to have the same or equivalent configuration as those of the previous embodiments are given the same reference numerals and redundant explanations will be omitted.

4, the main difference from the embodiment shown in FIG. 3 is that a plurality of notches 24 are formed in the contact body 16 in the axial direction of the body 16. It has similar effects.

The embodiment shown in FIG. 5 is mainly different from the embodiment shown in FIG.
5a, similar effects can be obtained even if formed in this manner.

The main difference between the embodiment shown in FIG. 6 and the embodiment shown in FIG. has similar effects.

The embodiment shown in FIG. 7 is mainly different from the embodiment shown in FIG. By configuring it in this way, the contact body 1 can be
6 can be given elastic force at all times.

As described above, the present invention forms a vacuum container by airtightly closing both ends of an insulating cylinder with metal end plates, and a pair of electrodes are placed in the vacuum container so that they can be moved relatively closer to each other and separated from each other from the center of each metal end plate. In order to connect the fixed lead and an external circuit through a pair of fixed and movable leads that are freely introduced and can be contacted and separated, and via a stud bolt embedded in the metal end plate on the fixed node side. The connection conductor is press-fixed, and the connection conductor is provided with a recess that surrounds the fixed lead and is open to the metal end plate side, and the conductive cylinder is expanded at both ends into the recess so as to be placed approximately in the middle. A contact in which a contact is fitted into a fixed lead, consisting of a contact body with a contact part having an arcuate cross section that protrudes inward, and a flange-shaped terminal integrally molded on one end of the contact body. The main body is elastically biased in the axial direction for storage, and the terminal part of the contact is inserted between the metal plate and the connecting conductor, so the connection between the fixed lead and the connecting conductor is ensured. , and can be made strong, and can have a large current carrying capacity.

In addition, compared to conventional ring contacts, the structure is simpler and lower cost, and it is also lighter and smaller, reducing shock and vibration associated with closing and closing operations, and also prevents the contact from coming off. play.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a conventional vacuum breaker, and FIG. 2 is a schematic explanatory diagram of the vacuum breaker according to the present invention, with some parts omitted.
FIG. 3 is a perspective view of the main part of the present invention, and FIGS. 4 to 7 are explanatory diagrams of different embodiments of the main part of the present invention, respectively. 11...Vacuum container, 12...Fixed lead, 13...Metal end plate, 14...Stud bolt, 15...Contactor , 15 a...
...Contact part, 16...Contact body, 17...
...Terminal part, 18...Bolt hole, 19...
...Connection conductor, 20...Lead hole, 21.
...Bolt hole, 22...Recess.

Claims (1)

[Scope of utility model registration request] Both ends of the insulating cylinder are hermetically closed with metal end plates to form a vacuum vessel, and a pair of electrodes are introduced into the vacuum vessel from the center of each metal end plate so that they can approach and separate from each other. A connecting conductor for connecting the fixed lead and an external circuit is pressed and fixed to the metal end plate on the fixed lead side via a stud bolt implanted in the metal end plate. The connecting conductor is provided with a recess that surrounds the fixed lead and is open toward the metal end plate, and in the recess, both ends of the conductive cylindrical body are expanded and protrude inward to approximately the middle part. A contact consisting of a contact body with a contact portion having an arcuate cross-section and a seven-lunge-shaped terminal portion integrally molded on one end of the contact body is fitted into a fixed lead, and the contact body is inserted in the axial direction. A vacuum breaker characterized in that the terminal portion of the contactor is inserted between a metal end plate and a connecting conductor.