DE2036137A1 - Electrical contact device - Google Patents

Description

E Ar / HG

Pall B123 W * ß 1 Q7 "■■ ' ¹ I'Ml HU'

PATENT ADVERTISEMENT £ V3Q \ öf

DlpL-ing. E. F. EITiSIER

8000 Munich 9O

Schlotthaueritraßö 3

ΤΛ (Q8U) 652321

.V. "COQ", Kanaalweg 72, Utrecht, the Wiederlande

"Zl e '£ zx .i.sche ΚωγΛ aktvoxrich« ung "

The invention relates to an electrical contact device for the permanent electrically conductive connection between one metal contact holder with a round opening and one see with a wide play centrally through the opening of this holder extending metal rod conductor with a round cross-section, which contact holder and which rod conductor are movable in Relation to each other are arranged and being in the annular A zigzag-shaped folded metal contact strip is clamped between this holder and this conductor.

Electrical contact devices of this type are known in many designs and they are used, among other things, in switches high performance for the permanent electrically conductive connection between the axially movable retaining pin and a fixed Circuit-breaker contact of the switch, in busbar system «mifc through such contact holders supported rails that are in operation are exposed to substantial expansion, in distribution and Söhaltsystenien with swiveling connecting ladders, which over in fixed sleeves or rings rotatable pins are electrically conductively connected to other conductors of these systems, etc. second hand. It has been shown that the bent into a ring, 2 zag-folded contact strips of such contact devices with axial movement or with rotation of the rod conductor in ■ Can deform reference to the contact holder, which can have an unfavorable influence on the current flow.

109834/0987

The purpose of the invention is to provide a contact device of the type mentioned, the possibility of a deformation of the contact strip which is unfavorable for current conduction during the relative movement of the rod conductor and the contact holder being limited to a minimum value "This-is achieved according to the invention in" that the blades of the contact strip all intermediate its ends in the same Richtunggeknickt and ge of a shorter and a longer extending from · buckling part, and in that in the strip leaves _s von.denen the shorter T eil to himself. 'extends between *, the. kink and the rod conductor ₉ and leaves _s ■''between the crease and the contact holder and the longer rope voη. where the longer part between the kink UIID the contact holder and the shorter! part extends between the: -. kink - and the rod conductor, alternating with each other strong thereof at mutual movement of the rod guide and the contact holder _s vesgrossert without the contact pressure between this wrapper ice -.und the contact 'halter one hand and between this strip .: and the rod head on the other hand with radial "movement" .of the ends of the " Leaves of the contact strip see greatly changed resilience of the contact strip remains supple under all circumstances. Another advantage is that the bent sheets of the contact strip come almost tangentially to rest against the rod guide, a rotation so that the rod guide in the sighting, which is entgegerigesetst that _s in DER the ^ lying against the rod conductors extending from the bend portions of these sheets is extend, does not lead to the contact strip being slipped on. Furthermore, the contact strip with the kinked leaves has the advantage that when strong currents, for example short-circuit currents, are carried, the leaves try to close each other; stretch, reducing the contact pressure between the contact! strip and the contact holder and the one between this strip and the rod conductor is increased and therefore the contact resistance is reduced *

109834/0987

- 3_ 203-137

It is noted that contact devices are known, wherein Between the contact holder and the rod conductor there is a wreath of separate kinked contact plates. These Plates must be replaced by a be supported by a separate ring or connected by interlocking parts so that they together form a Form closed, stiff at the point of the kink is. These known contact devices are involved and difficult to put together.

The stiffness of the contact strip of the contact device according to of the invention can be increased significantly if from spring leaf of this strip the shorter one starting from the kink Part is placed against the longer part of the following sheet of this strip starting from the crease. Support the leaves then each other. The effect of the folded sheet he des The contact strip can be enlarged further if the dated Kink outgoing parts of the leaf of the contact strip Include an angle of close to 90 °.

For a contact device with a rotating rod conductor, you can use Advantage a contact strip are needed, with the sheets at least at their one ends by tubular bent parts are connected to each other. Also, for other contact devices, e.g. for contact devices with axially movable rod :. ; ren this design has advantages because the contact points are better cooled can be. '. ;

To prevent the use of an axially movable Bar conductor ,. e.g. the axially movable contact pin of a switch, or an axially movable one designed as a sleeve Contact is maintained by the contact strip via the conductor or the Contact holder scrapes and through this X-pus or holder little is taken along in the direction of movement, whereby -. a unfavorable deformation of the Xontakt strip could occur, various measures can be taken. So can to

BADORIGlNAt.

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for this purpose the sheets of the contact strip can be connected to one another at least at one of their ends by a sharp palte, and the end parts of this palte can then be bent out of the plane of the strip. These sheets can also be connected to one another at least at one of their ends by a sharp fold and this palte can then have a convex shape in the plane of the strip. Furthermore, the contact strip can be given a dumbbell-shaped or a bulbous cross-section. All of these embodiments prevent the contact ■ stripes with sharp corners to the bar conductors or the contact holder comes into _contact;...,

The invention is explained in more detail with reference to the drawing. In it is:

Pig. ' 1 partly an axial section, partly a view of a Part of a switch pin and one that remains in contact with it fixed contact holder of a switch,

Pig. 2 on a larger scale a cross-section in the line II-II in Pig. 1, ■ '■'. ■,. "■ _ :., ..-

Pig. 3 shows a plan view of a part on an even larger scale , a contact strip for the contact device according to Pig. 1,

Pig. A a top view of a variant: the contact strip according to Pig. 3,.

Pig. Figure 5 is a perspective view of part of a second Variant of this contact strip,.

Pig. Figure 6 is a perspective view of part of a third Variant of this contact strip,

Pig. Figure 7 is a perspective view of part of a fourth Variant of this contact strip and

1 0 to ³ A h / 0987

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Pig. 8 is a perspective view of a. Part of a fifth Variant of this contact strip.

In Pig. 1 and 2, 1 is an axially movable switch pin of a large capacity electric switch. A fixed contact device consisting of an annular metal contact holder 2 and a contact strip 3 carried by it is attached to the permanent electrical connection of the peeling pin 1 to the external circuit. This contact strip 3 is formed from a straight metal strip which is initially folded in a zigzag and the leaves of which are then bent locally at 4 by an angle of 90 °. Next, the strip is bent into a closed ring overall M, which is arranged in clamping between the contact pin 1 and the contact holder. 2

From Pig. 2 shows that each sheet of the contact strip consists of a shorter part 3a starting from the bend 4 and a longer part 3b starting from the bend 4 and that each sheet with its shorter part 3a against the longer part 3b of the following sheet and with its longer part 3b lies against the shorter part 3a of the previous sheet. Leaves, dex being shorter. Part 3a extends between the bend 4 and the contact holder 2 and the longer part 3b / ^ extends between the bend -.4 and the contact pin 1, therefore alternate with leaves Λ , with the longer part 3b between the bend 4 and the contact holder 2 and the shorter part 3a extends between the bend 4 and the contact pin 1. .

With the contact strip according to Pig. 3 are the leaves on hers Ends connected to one another by a sharp palette 5.

The leaves of the contact strip according to Pig. 4 go to theirs Ends with tubular bent parts 6 into one another.

To "prevent the corners at the ends of the leaves of the

109834/0987

Scraping contact strips over the contact pin 1 when the latter is moved axially are in the embodiment according to Pig. 5 the corner parts 7 bent a little out of the plane of the strip. For the same purpose, in the Pig variant »6 the sharp gaps 8 at the ends of the leaves of the contact strip have a convex shape. 7 and 8 "the scraping of the contact strip over the switch pin is prevented by" that in Pig ₀ 7 the strip has a dumbbell-shaped transverse profile 9 and in Pig "8 the strip has a bulbous transverse pyofile 10". "

109834/09 8 7

Claims (1)

V "U-Jb Claims Electrical contact device for the permanent electrically conductive connection between a metal contact holder with a round opening and a metal rod conductor with a round cross-section which extends centrally through the opening of this holder and which contact holder and which rod conductor are arranged movably with respect to one another and wherein in the annular space between this holder and this conductor a> zigzag folded metal contact strip is clamped to form a closed ring, characterized in that the leaves of the contact strip are all bent between their ends in the same direction and each from a shorter one and a longer part extending from the bend and that in the strip, sheets of which the shorter part extends between the bend and the contact holder and the longer part extends between the bend and the rod conductor, and sheets of which the longer part extends between the bend and the contact holder and the shorter part extends between the bend and the rod conductor, alternate with each other. . 2. Electrical contact device according to claim 1, dadurc h denotes that of each sheet of the contact strip ens the '■ shorter, starting from the bend part against the longer starting from the bend Jj part of the following sheet of this strip. * "■ 3. Electrical contact device according to claim 1, characterized in that the parts of each sheet of the contact strip extending from the bend enclose an angle of almost go °. 4. Electrical contact device according to claim 1, characterized in that the matter of the contact strip at least ens ■ are connected to one another at one of their ends by tubular bent parts (I ¹ Ig. 4). ORIGINAL 5. Electrical contact device according to claim j., Daduroh gekennzeich.net that the sheets of the contact strip are connected to each other at least at their ends by a sharp fold and the end parts of this Palte are bent out of the plane of the strip (Pig. 5). 6. Electrical contact device according to claim 1, characterized in that the sheets of the contact strip are connected to one another at least at one of their ends by a sharp palte and this palte has a convex shape in the plane of the strip (Pig. 6). . 7. Electrical contact device according to claim T, characterized in that the contact strip has a dumbbell-shaped transverse profile (Pig. 7). \ 8. Electrical contact device according to claim 1, characterized gekennzeieh.net that the contact strip has a ^ bulbous transverse profile (Pig. S). ■ - ■■ U-. ■■ '«* ■' _ 10983 4/0987 Read more ^S 4