Electrical connectors – Interrelated connectors relatively movable during use – Universal movement
Patent
1999-08-27
2000-10-10
Bradley, Paula
Electrical connectors
Interrelated connectors relatively movable during use
Universal movement
439246, H01R 3900
Patent
active
06129554&
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an electrical coupling device for connecting separable connecting leads between at least two switchrooms, in particular for medium voltage switchgears, the connecting leads being passed through container walls and surrounded, in each case, by a rotationally symmetrical insulating body, the insulating bodies being surrounded by an insulating collar that is common to both, and the connecting leads being connected by a contact device in an electrically conductive manner.
BACKGROUND INFORMATION
One electrical coupling device is described in European patent 0 199 249. There, two electrical conductors are surrounded, in each case, by rotationally symmetrical insulating bodies, the conductors being located across from each other with clearance, and their insulating bodies having a central recess. The cavity formed by the clearance of the insulating bodies and by their central recess, is formed by a collar which is fitted to the exterior contour of the insulating body, the cavity in its middle area being closed off by a bulge of the collar. In the cavity is located a contact device, which encloses the two conductor ends having a shaft-shaped cross-sectional contour. At each of its ends the contact device is pressed to the conductor ends by an annular spring having a radially-acting force component. As a result of the existing cavity, which is enlarged still more by the circumferential bulge, the contact device is able to compensate for misalignments of the conductor ends within certain limits.
SUMMARY
An object of the present invention is to provide a coupling device between the conductors while maintaining the compensation for the misalignments of the conductor ends, the coupling device capable of being produced using significantly simpler structural means than is the case with the conventional devices, and in which, particularly, misalignment compensation is assured within the widest possible limits, without impairing the contacting and without altering the structural means. In addition, the contacting between the conductors as well as the loads created by the electrical fields within the insulating medium are additionally improved. In accordance with present invention, this is achieved by providing a device in which the free ends of the connecting leads extending out of the switchrooms are realized by a first and by a second lead-in pin, which have annular recesses for receiving a contact pin, the recesses being provided with a multi-contact at the front-form, facing sides. Additionally the contact pin is configured in one piece and is spherical in the area of the multi-contact. Moreover the insulating collar is formed from a sleeve composed of silicon rubber, which in the longitudinal middle area of the contact pin has a curved shape. Futhermore the sleeve is furnished in the curved part with a potential conductive layer extending, in each case, up to the adjacent lead-in pin, and forms with the contact pin an annular potential- contact point. Also, the sleeve is fixed in position in the area of the housing by a pressure sleeve. Finally, the sleeve has a ground potential-conductive layer in the circumferential area facing outward, which conductively connects the container walls.
On the basis of the contact pin, configured as a one-piece compact component provided between the two lead-in pins, the contact pin being configured spherically at the free ends and being supported in the correspondingly annular recesses of the lead-in pins, a coupling device is created which provides optimal conditions for tolerance compensation between the conductors. Thus, for example, both conductors, connected to the respective lead-in pins, are brought together in the permissible area of tolerance at any given angle with respect to each other, without additional adjustments of the electrical coupling devices being foreseen. At the same time, lateral misalignments, i.e., deviations from the ideal middle axis of the respective lead-in pin, are compensated for in a simple manner
REFERENCES:
patent: 3842187 (1974-10-01), Barkan
patent: 5980290 (1999-11-01), Meynier et al.
Bradley Paula
Siemens Aktiengesellschaft
Ta Tho D.
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