DD246866A1

DD246866A1 - TULIPOFFER CONTACT

Info

Publication number: DD246866A1
Application number: DD28798286A
Authority: DD
Inventors: Olaf Schaffrath; Wolfgang Polansky
Original assignee: Buchwitz Otto Starkstrom
Priority date: 1986-03-18
Filing date: 1986-03-18
Publication date: 1987-06-17

Abstract

Waehrend das Ziel der Erfindung in der Bereitstellung eines sich durch eine hohe Betriebs- und Funktionssicherheit auszeichnenden tulpenfoermig ausgebildeten Kontaktes liegt, besteht die Aufgabe darin, eine grosse Beweglichkeit des aus Kontaktsegmenten bestehenden tulpenfoermigen Kontaktes zum Toleranzausgleich ohne Minderung der Stromtragfaehigkeit beim Einfahren des Kontaktstiftes zu gewaehrleisten. Erfindungsgemaess ist nunmehr vorgesehen, dass im Bereich der Kontaktstellen 4, 9 der Kontaktsegmente 3 mit dem Kontaktbolzen 1 und dem Kontaktstift 10 im Ruecken der Kontaktsegmente 3 querrillenfoermige Ausnehmungen 6, 11 vorgesehen sind, in die mit ihrem einen Ende Druckfedern 7, 12 eingreifen, die jeweils als Gegenlager ein das andere Ende der Druckfedern 7, 12 fuehrend umfassenden Ring 8, 13 aufweisen, welcher den tulpenfoermigen Kontakt jeweils im Bereich der Kontaktstelle 4, 9 konzentrisch umgibt, wobei die Kontaktsegmente 3 auf dem Kontaktbolzen 1 im Bereich ihrer Kontaktstelle 4 konvex gewoelbte Vorspruenge 5 aufweisen, die mit Spiel in eine am Ende des Kontaktbolzens 1 eingearbeiteten Ringnut 2 radial um den Kontaktbolzen 1 eingelegt sind. Fig. 1While the aim of the invention is to provide a tulip-shaped contact of high operational and functional reliability, the object is to ensure a high mobility of the tulip-shaped contact consisting of contact segments for tolerance compensation without reducing the current carrying capacity during retraction of the contact pin. According to the invention it is now provided that in the region of the contact points 4, 9 of the contact segments 3 are provided with the contact pin 1 and the contact pin 10 in the back of the contact segments 3 quererrillenfoermige recesses 6, 11, in the one end of which compression springs 7, 12 engage in each case as an abutment a the other end of the compression springs 7, 12 leading comprehensive ring 8, 13, which surrounds the tulpenfoermigen contact each in the region of the contact point 4, 9 concentric, the contact segments 3 on the contact pin 1 in the region of its contact point 4 convexly gewoelbte Projections 5, which are inserted with play in a machined at the end of the contact pin 1 annular groove 2 radially to the contact pin 1. Fig. 1

Description

Neben dem Toieranzausgleich beim Einfahren des Kontaktstiftes in den tulpenförmigen Kontakt gewährleistet diese erfindungsgemäße Lösung auch, daß selbst bei Ausfall einer der die Kontaktsegmente nach innen drückenden Federn eine genügend große Kontaktkraft durch die übrigen Federn aufgebracht wird, und so dertulpenförmige Kontakt nicht in seiner Stromtragfähigkeit beeinträchtigt wird. Darüber hinaus zeichnet sich der erfindungsgemäße tulpenförmige Kontakt durch eine gute Montagefreundlichkeit beim Einbringen der Federn in die Vertiefungen im Rücken der Kontaktsegmente und in die Vertiefungen in den die Kontaktsegmente umfassenden Ringen aus.In addition to the Toieranzausgleich when retracting the contact pin in the tulip-shaped contact this solution of the invention also ensures that even if one of the contact segments inwardly pressing springs a sufficiently large contact force is applied by the remaining springs, and so tulip-shaped contact is not affected in its current carrying capacity , In addition, the tulip-shaped contact according to the invention is characterized by a good ease of installation when introducing the springs into the recesses in the back of the contact segments and into the recesses in the rings comprising the contact segments.

Ausführungsbeispie!Ausführungsbeispie!

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In derzugehörigen-Zeichnung zeigen:The invention will be explained in more detail below using an exemplary embodiment. In the corresponding drawing show:

Fig. 1: die Vorderansicht des tulpenförmigen Kontaktes mit eingefahrenem Kontaktstift, im Halbschnitt dargestellt; Fig. 2: die Draufsicht nach Fig. 1Fig. 1: the front view of the tulip-shaped contact with retracted contact pin, shown in half section; 2: the plan view of FIG. 1

Gemäß Figur 1 ist der Endbereich des Kontaktbolzens 1 mit einer rechteckigen Ringnut 2 versehen. In dieser Ringnut 2 sind mit Spiel mehrere nebeneinander angeordnete Kontaktsegmente 3 mit ihren im Bereich dieser gebildeten Kontaktstelle 4 konvex gewölbten Vorsprüngen 5 radial um den Kontaktbolzen 1 eingelegt. Um die Kontaktkraft direkt auf die Kontaktstelle 4 wirken zu lassen, sind in diesem Bereich im Rücken der Kontaktsegmente 3 kreisbogenförmige Ausnehmungen 6 in Form einer Querrille . eingearbeitet, wobei die Ausnehmungen 6 jedes Kontaktsegmentes 3 das eine Ende einer Druckfeder 7 aufnimmt. Als Gegenlager für die Druckfeder 7 dient ein zur Federführung mit'einer innen angeordneten rechteckigen Ringnut versehener Ring 8. Im Bereich der Kontaktstelle 9 der Kontaktsegmente 3 mit dem Kontaktstift 10 ist jedes Kontaktsegment 3 mit einer, mit einem relativ großen Radius versehenen konvexen Wölbung versehen, um die Kräfte für das Einfahren des Kontaktstiftes 10 gering zu . halten. Im Rücken der Kontaktsegmente 3 sind der Kontaktstelle 9 gegenüberliegend konkav gewölbte Ausnehmungen 11, ähnlich den Ausnehmungen 6, für Druckfedern 12 angeordnet. Diese Ausnehmungen 11 erleichtern das Montieren der Druckfedern 12 und verringern den Materialaufwand für die Kontaktsegmente 3. Als Gegenlager für die Druckfedern 12 dient ebenfalls ein Ring 13, der die gleiche Ausbildung aufweist, wie der Ring 8.According to FIG. 1, the end region of the contact pin 1 is provided with a rectangular annular groove 2. In this annular groove 2 a plurality of juxtaposed contact segments 3 are inserted with their game in the region of this contact point 4 convexly curved projections 5 radially to the contact pin 1 with game. To make the contact force act directly on the contact point 4, in this area in the back of the contact segments 3 arcuate recesses 6 in the form of a transverse groove. incorporated, wherein the recesses 6 of each contact segment 3 which receives one end of a compression spring 7. In the area of the contact point 9 of the contact segments 3 with the contact pin 10, each contact segment 3 is provided with a, provided with a relatively large radius convex curvature, serves as an abutment for the compression spring 7 to the spring leadership mit'einer arranged rectangular annular groove. to the forces for the retraction of the contact pin 10 low. hold. In the back of the contact segments 3 of the contact point 9 opposite concave recesses 11, similar to the recesses 6, arranged for compression springs 12. These recesses 11 facilitate the mounting of the compression springs 12 and reduce the cost of materials for the contact segments 3. As a counter bearing for the compression springs 12 is also a ring 13 which has the same design as the ring. 8

Da die zum Kontaktmund hin liegenden Druckfedern 12 mit ihrem als Ring 13 ausgebildeten Gegenlager, abweichend von den bekannten Lösungen keine mechanische Verbindung zu den um den Kontaktbolzen 1 angeordneten Druckfedern 7 besitzen, ist eine große Beweglichkeit der Kontaktsegmente 3 zum Ausgleich von Toleranzen gewährleistet.Since the compression spring 12 lying towards the contact mouth, with its counter-bearing 13 designed as a ring, deviating from the known solutions, have no mechanical connection to the compression springs 7 arranged around the contact pin 1, a great mobility of the contact segments 3 to compensate for tolerances is ensured.

Claims

Invention claim:

1. tulip-shaped contact, which consists of contact segments, which at its back by springs for producing a

Current transfer to the contact segments bearing contact pins and retractable into the contact pin

be acted upon, characterized in that in the region of the contact points (4; 9) of the contact segments (3) with the contact pin (1) around the contact pin (10) in the back of the contact segments (3) transverse groove-shaped recesses (6; engage with their one end compression springs (7; 12) each having as an abutment a the other end of the compression springs (7; 12) leading comprehensive ring (8; 13), which the tu Ipenförmigen contact respectively in the region of the contact point ( 4, 9) concentrically surrounds, wherein the contact segments (3) on the contact pin (Dim range of their contact point (4) convexly curved projections (5), with play in a at the end of the contact pin (1) incorporated annular groove (2) radially around the contact pin (-1) are inserted.

2. tulip-shaped contact according to item 1, characterized in that the compression springs (7; 12) surrounding the abutment rings (8; 13) inside a rectangular annular groove.

For this 1 page drawings

Field of application of the invention

The invention can advantageously be used in high-voltage switchgears for use and is used to establish a current transition between a fixed segment-like and tulip-shaped contact and a retractable into this contact movable contact pin.

Characteristic of the known technical solutions

According to DE-AS 2213795 (H 01 H 1/38), an electrical contact for the connection of a movable contact pin in high-voltage switchgear is already known, which arranged axially around the fixed contact pin contact segments with the contact mouth out upstream contact rollers transverse to the on or off movement has the contact pin. For contact between the movable contact pin and the fixed contact pin, the contact segments are supported via two springs on a cage surrounding the contact segments. A disadvantage of the solution according to DE-AS 2213795, however, is that the cage, which serves as an abutment for the springs in the region of the contact mouth and in the region of the contact pin, produces a mechanical connection for each spring pair of a contact segment. By this mechanical connection, the radial mobility of the contact for tolerance compensation between the movable contact pin and the stationary contact pin is severely limited. To avoid this disadvantage, an electrical contact especially for high-voltage switching cells (CSIM 1-12, ASIF 36) is known, which has a contact carrier radially arranged contact segments, each having two transverse grooves in their backs, in each of which a contact segments enclosing all the back tension spring is arranged, on the one hand ensure the necessary contact forces for power transmission from the contact segment to the fixed contact pin and on the other hand from the contact segment on the retracted switching pin. The disadvantage of this tulip-shaped electrical contact is that at a fatigue of the tension spring decreases the contact force, leading to an increase in the contact resistance associated with a strong warming leads. As a result, it may come to annealing the tension spring, which can cause the disintegration of the contact.

Object of the invention

The aim of the invention is to provide a characterized by a high operational reliability and tulip-shaped contact.

Explanation of the essence of the invention

The invention has for its object to provide a tulip-shaped contact, which consists of contact segments, which are acted upon at their backs by springs for producing a current transition to the contact segments bearing contact pin and retractable into the contact pin, the individual support of the contact segments without Reduction of current carrying capacity a large mobility of the contact segments for tolerance compensation when retracting the 'contact pin allows.

According to the invention, the object is achieved in that in the region of the contact points of the contact segments with the contact pin and the contact pin in the back of the contact segments transverse groove-shaped recesses are provided, engage in the one end compression springs, each leading as an abutment the other end of the compression springs have comprehensive ring which concentrically surrounds the tulip-shaped contact in each case in the region of the contact point, wherein the contact segments on the contact pin in the region of its contact point convexly curved projections which are inserted with play in a machined at the end of the contact pin ring groove radially around the contact pin. Conveniently, the rings surrounding the tulip-shaped contact as an abutment for the compression springs inside a rectangular annular groove.