JPH0214767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact bridge device for a tap selector of a multi-stage transformer as described in the first part of claim 1.

[Conventional technology]

This type of contact device is used, for example, in the West German Utility Model No.
It is known from the publication No. 6942913.

In the above contact bridge device, the fixed contact is formed by a round contact rod, and when each contact bridge makes contact by forming two contact positions of the contact rod by a V-shaped notch, the fixed contact The disadvantage is that the corresponding contact bridge must occupy a precise intermediate position with respect to this stationary contact. this is,
Due to the unavoidable tolerances that exist both in the contact bridge itself and in the position of the fixed contact, even slight deviations from the intermediate position can lead to difficulties. In the case of the contact devices mentioned at the beginning, there is a requirement to maintain each intermediate position accurately with respect to the fixed contact, especially when the fixed contact is not designed as a flat contact with a long sliding surface. strong.

[Problem of invention]

In the case of the contact bridge device mentioned at the beginning of this document, it is an object of the invention to provide a means by which the contact bridge can be set in a precise intermediate position with respect to the fixed contact during assembly of the tap selector, regardless of the unavoidable tolerances. It's about doing.

[Solving issues]

The above-mentioned problem is solved according to the present invention by the means disclosed in the characterizing part of claim 1.

[Action/Effect]

The advantage provided by the invention is that when operating the tap selector, the stop on which the contact bridge slides can be moved, so that even after assembly of the tap selector, the contact bridge can be moved to its intermediate position. The point is that it can be easily readjusted.
In this case, it is effective if each stopper is arranged eccentrically with respect to the contact bridge case and constituted by a bolt that can be restrained. For this reason, it is particularly advantageous if at one end of every bolt there is a square end which is eccentric with respect to the central axis of the bolt and which fits into an octagonal cutout in the contact bridge case. This makes it possible to move the bolt used as a stop in stages and precisely position the contact bridge. The bolt used as a stopper is
It is further advantageous if every stopper bolt has a sleeve rotatable around the bolt with an external abutment surface, since it abuts the narrow side of the contact bridge. This external abutment surface is adapted to each position of the contact bridge. This prevents the bolt from becoming stuck in the contact bridge when the contact bridge is operated frequently.

〔Example〕

Embodiments of the invention are shown in the drawings and will be explained in more detail below.

The contact bridge device consists of two opposed contact bridges 1, 2 of flat design. These contact bridges are arranged between tap contacts formed on the one hand in the contact ring 3 and on the other hand in the contact rod 4. Both contact bridges 1, 2 are arranged together with a contact compression spring 5, its guide bolt 6 and a spacing member 7 in a contact bridge case 8. The contact bridge case 8 is fixed to a rotatable operating tube 9, which is used to pivot the contact bridge device in the direction of the arrow. Contact bridge case 8
In addition, four stopper bolts 10, 11,
12 and 13 are arranged. These bolts are
When rotating the operating tube 9, i.e. when pivoting the contact bridge case 8 sideways, it hits the narrow sides of the contact bridges 1, 2 and entrains them. The contact bridge is therefore led downwards from the contact rod 4 and impinges on an adjacent contact rod (not shown). In this case, the individual contacts 4 are usually arranged in a ring shape and are each fixed to an insulating frame 23. Each stop bolt has a rotatable sleeve 14, 15 in order to increase the pressure surface between the stop bolt and the contact bridge. These sleeves each have contact bridges 1 and 2.
It has an external abutment surface that corresponds to the narrow side of the In this case, the abutment surface 16 is adapted to any position on the contact bridge, since the sleeves 14, 15 can be pivoted.

Which stopper bolt 10, 11, 12, 13
Since there are also eccentric bearings 17, 18 at the ends of the contact bridge case 8, by rotating the stopper bolts individually, the abutment surfaces 16 of the stopper bolts or sleeves 14, 15 and the contact bridge 1 , 2 can be varied. Individual eccentrically mounted stopper bolts 10,1
It is easy to see that by rotating the contact bridges 1, 12, 13, the contact bridges 1, 2 can be brought into exactly an intermediate position relative to the fixed contact rod 4. in this case,
The readjustment of the contact bridges 1, 2 can be carried out independently of the respective existing tolerances, for example as indicated in FIG. 1 by dash-dotted lines.

As can be seen in particular from FIG. 4, the stopper bolts 10, 11 each have a square plate 19, 20 at their upper end, which end fits into the octagonal notch 21, 22 of the contact bridge case 8. They are fixed to bolts 10 and 11, respectively. By exchanging the square plates 19, 20, the abutment surfaces 16 of the attached sleeves 14, 15 can be mutually changed by a total value a.

[Brief explanation of drawings]

FIG. 1: A plan view of the new contact device with the contact bridge case cut away. FIG. 2 is a longitudinal sectional view of this contact device. FIG. 3 is a cross-sectional view of this contact device. FIG. 4 is an enlarged view showing details of adjustment of the stopper bolt. Reference symbols in the figure: 1, 2...Contact bridge, 3...
...Contact ring, 4...Fixed contact rod, 8...Contact bridge case, 9...Operation tube, 10, 11, 1
2, 13... Bolt, 14, 15... Sleeve,
19, 20...square plate, 21, 22...notch.

Claims (1)

[Scope of Claims] 1. Force is transmitted from the contact bridge case to the contact bridge by means of a stopper disposed on the contact bridge case that faces the contact bridge laterally, and the fixed contact to be coupled is accommodated between the contact bridges themselves. In a contact bridge device for a tap selector of a multi-stage transformer, the contact bridge device for a tap selector of a multi-stage transformer is provided with at least two flat-shaped laterally pivotable contact bridges, which are introduced from a contact bridge case surrounding said contact during pivoting, the stop member 10 , 11...16 are arranged in the contact bridge case 8 so as to be adjustable. 2 Each stopper member has one bolt 10,
...13, and the bolt is supported and restrained at both ends by eccentric bearings installed in the contact bridge case 8. . 3. The restrainable bolts 10, 11 have at one end an eccentrically arranged square end 19, 20, which square end fits into the octagonal notch 21, 21 of the contact bridge case 8.
3. The contact bridge device according to claim 2, wherein the contact bridge device is restrained by meshing with 22. 4 The restrainable bolts 10, 11, 12, 13 are fitted with rotatable sleeves 1 with external abutment surfaces.
4, 15 are inserted, and the sleeve abuts against the narrow end surfaces of the contact bridges 1, 2 by means of these contact surfaces.
Contact bridge device as described in Section.