Electrical plug and socket connection

Details Electrical plug and socket connection Electrical plug and socket connection

1983-12-05

1986-06-10

Weidenfeld, Gil

Geometrical instruments

339126RS, 339103M, H01R 400

Patent

active

045939624

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a pressure tight, strain-relieved plug-and-socket connection, and more particularly to a plug-and-socket connection in which a plug element can be attached to a diesel engine governor or controller apparatus, subject to pressurized oil at the inside, and a socket connected to the plug, in which the plug and socket connection will be tight with respect to pressurized oil from the inside of the governor and, additionally, tight with respect to external influences such as humidity, salt spray and the like, while, further, being resistant to shock and vibration resulting from the operation of the diesel engine.
Background
Numerous plug connectors are known, in which round plugs form a first plug part and are received in a socket forming a second plug part, the plug parts being held in contact with one another, in the inserted state, by a covering connection union nut. In plug and socket connections of this type, however, there is the disadvantage that they do not meet the requirements for use in highly loaded Diesel engine units. Neither the first plug part nor the prongs positioned in it are disposed with sufficient tightness with respect to pressure, lubricating oil and splashing water, nor are they with respect thereto led out sufficiently tightly from an oil-filled governor located on the Diesel engine unit. Furthermore, the plug parts in known plug and socket connections are fastened together merely elastically by the covering union nut, since the plug parts rest not directly on one another but rather on both sides of a seal. As a result, relative movements of the plug parts against one another occur, which especially under the rough conditions prevailing in motor vehicle operation cause premature wear of the plugs and the socket parts.


THE INVENTION

It is an object to provide a plug-and-socket connection which will meet the rigorous and rough operating requirements of attachment to a diesel engine, and particularly to a diesel engine which may be used in vehicular applications, that is, which is exposed to environmental conditions which tend to corrode or mechanically interfere with good electrical contacts.
Briefly, a union-type coupling is being used in which, however, inner elements are provided which form a tight seal between a connecting cable and terminal elements which receive plug or prong terminal elements attached to a support plate or wall. A projecting sleeve portion of insulating material is formed on one of the parts of the plug-and-socket connection, which, for simplicity, may be termed the plug part. Projecting prongs are sealed within the plug part which in turn is sealed by a pressure tight seal connection into the wall through which the connection is to extend, for example, be a compressed O-ring. The plug part, arranged for sealing connection with the socket part, includes a carrier sleeve which has an outer guide surface formed thereon. The carrier sleeve surrounds, at one end portion, the cable which extends from the plug part. The carrier sleeve retains therein two elements, one forming an inner receiving bushing in which chambers are formed to receive terminal elements to contact the prongs, which terminal elements are attached, for example by solder, to the individual cable elements of the connecting cable. The bushing is retained within the carrier sleeve by an inter-engaging projection-and-recess arrangement, for example by snapping projecting prongs extending from the receiving bushing into matching recesses internally of the carrier sleeve. An end plate, and located thereagainst a sealing disk, both formed with openings, are positioned so that they will bear against end surfaces formed on the bushing. They are pressed against the bushing, for sealing engagement around the respective cable elements by a clamping sleeve which is also located inside of the carrier sleeve, and to press the sealing disk, and the end plate against the contact receiving bushing. Additionally, the clamping sleeve is formed with strain relieving corrugations which c

REFERENCES:
patent: 2655638 (1953-10-01), Allen
patent: 2984811 (1961-05-01), Hennessey, Jr. et al.
patent: 3017597 (1962-01-01), Nava et al.
patent: 3266009 (1966-08-01), Jensen et al.
patent: 3576517 (1971-04-01), Johnson et al.
patent: 3786396 (1974-01-01), Kemmer et al.
patent: 3818420 (1974-06-01), Barr
patent: 4193655 (1980-03-01), Herrmann
patent: 4310213 (1982-01-01), Fetterolf et al.

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