Electrical connectors – With insulation other than conductor sheath – Plural-contact coupling part
Patent
1989-04-25
1990-08-28
Desmond, Eugene F.
Electrical connectors
With insulation other than conductor sheath
Plural-contact coupling part
439372, 439376, H01R 13629, H01R 13645
Patent
active
049521764
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an electrical coupling device with a blade strip rigidly arranged on an equipment frame, with a casing adapted for suspension in bearings of the equipment frame by means of two articular pins equiaxially disposed next to each other with a spacing in between, and with a sleeve strip accommodated in such casing and linked on the equipment frame and adapted for engaging link blocks in link grooves of the casing for swinging the latter against the equipment frame, as well as with coding means arranged on the equipment frame and casing.
For coding purposes, it is known in connection with electrical couplings of this type (EP 0 119 951 Al) to arrange coding pieces within the zone of the rotatable mount of the casing and equipment frame, such coding pieces meshing on such casing and frame. For this purpose, the coding piece provided on the one coupling part has a cylinder section adapted for swinging into a coding piece of the other coupling part, such other coding piece having a hollow cylindrical section. Aside from the fact that it is difficult to produce the coding pieces, the latter require complicated measures for fastening them on the coupling parts. Moreover, changing the coding requires considerable installation work.
The problem of the invention is to create a simple and safe coding for coupling devices that is also variable.
According to the invention, this is accomplished in that the casing of the sleeve strip has slottings prepared next to each other between the articular pins on contours that can be broken out, such slottings having open ends in front in the plugging direction, and that the equipment frame has at least one coding pin supported between the bearings of the articular pins, such coding pin being exchangeably inserted in openings of the equipment frame and adapted for engaging slottings of the casing of the sleeve strip. Such casing of the sleeve strip is preferably formed by a flat strip between the two articular pins and has slottings prepared by contours which can be broken out. In this way, the coding means for coding the coupling parts can be produced in a simple way and without the disadvantage of having to enlarge the frame of the equipment and/or casing. Furthermore, the prepared slottings and the coding pin can be formed on tools without great expenditure.
For embodying the coupling device, provision is made, furthermore, that each of the link grooves has a conically tapering link part with a transversely extending link groove part, such tapered parts being disposed at the ends where the link blocks of the levers are inserted, and that such transversely extending link groove parts have two curved retractions disposed one after the other as catches for the prelocking and locking positions. When the casing of placed against the frame of the equipment, partial swinging of the casing in connection with the twin levers supporting the link blocks permits prelocking of the casing by engagement of the link blocks in the one retraction. From this prelocked position, the casing can then be locked on the frame of the equipment by swinging the twin levers down further and shifting the link blocks into the other retraction or catch. The retractions for the locking position usefully extend ahead of the vertical line of connection of the center axis of the pins to the equipment frame. In this way, an excess stroke is accomplished for the twin levers , which excludes unintentional automatic disengagement.
Finally, provision is made that the two levers are twin levers with lever arms of varying lengths, and that such twin levers are connected with each other by a bridge, whereby the levers are supported on the frame of the equipment by means of journals and the short arms of the levers support the link blocks. According to a preferred embodiment, the lever arms and the bridge are formed by a single-piece shaped part, and the pins and/or the link blocks are formed by deep-drawn attachments arranged on the lever arms for enhancing the stability.
For the purpose of preventi
Koiner Josef
Steinhardt Helmut
Desmond Eugene F.
Hanchuk Walter G.
TRW Daut & Rietz GmbH
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