DE3010987A1 - CONNECTION ASSEMBLY FOR AN ELECTRICAL LINE - Google Patents

Description

Dipl.-Ing. Dipl.-Chem. Dipl.-Ing.

E. Prince - Dr. G. Hauser - G. Leiser

Ernsbergerstrasse 19

8 Munich 60

March 21, 1980

BREEZE ILLINOIS, INC.

Main and Agard Streets

Wyoming, Illinois 61491 /V.St.A.

Our reference: B 1586

Connection assembly for an electrical line

In a device with electrical wiring, an unprotected cable is often used, which consists of consists of many individual unprotected wires or cables. The cable can be covered with rubber or the like be covered, however, it is generally unprotected and the wires or leads are opposite external forces or loads structurally unprotected, unless they are such by their own strength Can withstand loads. Correspondingly, the cable can be damaged by bending, pulling or pressing or by cutting forces exerted on the cable will.

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A protected or shielded cable consists of a permanent but flexible pipe that runs through the inside arranged wires or lines protects or encloses. In such cases, the flexible pipe or the flexible protection on all mechanical bending, tensile and compressive forces and it withstands atonement forces, so that the inner Wires or lines are protected. Usually there are both unprotected and protected cables at the ends for releasable connection of wires or lines, both in electrical and mechanical manner, with other similar ones Cables or connections to a terminal board are provided. End couplings are also used to make the mating To mechanically fix or lock end connections with one another.

A typical termination for an unprotected cable has generally an annular body formed from metal or durable plastic containing a number of Encapsulates end connections or pins, one of which is available for each individual wire or line, and these end connections or contact pins are designed to telescopically or by tightly pressing together associated surfaces with those arranged in the same way To work together terminals or pins of a separate mating end connection. The individual wires or Lines of the cable are with the end connections or contact pins connected by soldering, folding or the like. Often surrounds these connection components for sealing of the cable a compressible grommet made of rubber. The grommet is via such connecting components securely pressed on by means of a nut, which tightly fits onto the connecting body against a conical, the bushing surrounding compression ring made of plastic is pulled.

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One form of the commonly used coupling for mechanically clamping the connecting body with its separate one End connection or terminal board is in the form of an annular sleeve which fits over and is rotatable on the connector body, cooperating Shoulders limit the separation of the components in the axial direction. The sleeve has mechanical means for example bayonet-shaped clamp elements, threads or the like, which are mechanically mounted on an associated coupling sleeve on the adapted end connection or the terminal board establish a permanent connection.

The termination used on a protected or shielded cable generally has a tubular extension, which works telescopically with the flexible conduit and has a mechanical connection in the form of a Tie and / or fur collar that can be produced between the telescopically nested components. However, the actual coupling or fit of the connectors is that used on a protected cable becomes completely different, and it is generally not comparable to the coupling and connector fits used on unprotected cables. Accordingly, fitting pieces are generally placed on the usual unprotected connectors in order to secure the connection with a protected cable, which increases the cost and size of the end connector assembly.

The invention relates to an improved end connection and coupling assembly used in a protected or shielded cable with a flexible conduit should be used, with the assembly to normal connections or coupling pieces that are used for unprotected cables. The special assembly uses a

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conventional annular connecting body for holding a number of arranged end pins or contacts through an insulating body in connection with a special ring-shaped fitting piece through which the cable lines or Wires going through. The connector has a tubular end which is sized to be telescopic the cable line receives and is mechanically connected to this, as well as an opposite tubular End provided with a tapered inner bore surface extending in a direction from the fixed Cable diverges away.

The adapter of the invention also has thereon an external shoulder or the like that is effective with a common fastening nuts can work together to achieve the To pull fitting piece firmly against an annular connecting body. An elastic grommet is over the Cable lines or wires attached and in the axial direction and in the radial direction between the tapered Surface of the fitting as well as the annular body and / or the insulation by pulling the fitting pressed tightly against the annular connecting body. The end pins or contacts of the connection are used for the various individual wires or lines by soldering, crimping, pressing or other methods Way connected. A coupling sleeve works with a outer shoulder on the annular connector body together to mechanically connect the connector assembly to the Connection or the switchboard connection to be firmly connected.

In the following an embodiment is described, which is shown in the drawing. In the drawing are:

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Figure 1 is a perspective view of a typical protected cable which is a preferred embodiment shows an improved connection and coupling assembly according to the invention attached at one end thereof,

FIG. 2 shows a section along the line 2-2 in FIG. 1, and

Fig. 3 is a representation similar to that of Fig.2, the however, the components are partially exposed or disassembled for ease of explanation shows.

Fig. 1 shows a protected or shielded cable 10 with one at both ends, only one end of which is shown attached connector and coupling assembly 12, through which the cable 10 mechanically and electrically can be connected to a suitable panel connector or a similar cable, not shown. The cable 10 has a customary flexible pipeline according to FIGS 14- made for example by winding a single The strip or band of permanent material is formed in an overlapping helical fashion, a mechanical connection between the adjacent turns. 16 to allow, although adjacent turns can roll against each other and provide limited lateral bending of the pipelines. The particular embodiment of the tubular conduit 16 itself does not form part the invention.

Typically there is a spun over the inner duct 14- or braided cover 18 arranged, also by braiding in opposite one another helical directions a plurality of discrete

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Threaded strands or wires is formed. It should be pointed out again that the special design of the braided cover 18 does not form part of the invention. A coating 20 of insulating material, for example Rubber, is applied over the braided cover 18, thereby making the tubular conduit 14 watertight.

In the line 14 are a number of separate, in arranged in the axial direction extending wires or lines 22, of which only three are shown in the drawing and differentiated with the letters a, b and c. It should again be noted that the specific number and the type of lines 22 can be changed and that they do not form part of the invention. However, they are Lines enclosed within the pipeline 14 through the pipeline against a mechanical bending over a certain limit and they are still protected against cross cutting forces acting on the pipeline protected.

The ends of the conduit 14 and the conduits 22 are, as mentioned above, with the connection and coupling assembly 12 "connected and the special way of connection is described below. The connection and coupling assembly 12 has a connector 24 which is in part by an annular fitting 28 with a tubular End or a tubular extension 30 is formed is. The end 30 is somewhat larger than the outer ones Dimensions of the conduit 14 such that the end telescopes the conduit 14 or overlaps the conduit can. The fitting 28 also has an inner annular shoulder 32 against which the free end of the conduit can impact when the components are telescoped into one another.

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Preferably, the rubber cover 20 fits the Line 14 over the tubular end 30 of the fitting 28, when the conduit is inserted into the end of the fitting and mechanical means are used to telescope the to connect inserted line and the fitting piece with each other securely. The connection is made through a collar or clip 34 which fits over the tubular end 30 of the fitting 28 and folds or is tightened down onto the rubber cover, thereby deforming the tubular end firmly against the conduit 14 can. Other means of mechanical connection between the pipeline and the fitting can be used be, for example a gluing with epoxy resin, a welding or a direct folding of the fitting piece. The inner lines 22a, 22b, 22c etc. extend according to Fig.2 over the shoulder 32 to the front or facing away End of adapter 28.

The connector 24 further has an annular connector body 40 which is generally in the center of the Body thereon has an annular shoulder 42 and a series of outer helical threads 44 which lie between the shoulder 42 and the annular end face 45 of the Connecting body formed adjacent to the fitting piece 28 Inside the hollow annular connecting body 40, an insulator 46 is arranged. A number of Conductive end pins or contacts 48 are arranged in corresponding tubular openings which are formed through the insulator 46 are, and they are held parallel to one another by these tubular openings. In general is a contact pin 48a, 48b, 48c etc. is provided for each individual line 22a, 22b, 22c etc. held in the cable 10. the Ends 49a, 49b, 49c etc. of each contact pin 48 project over a radial surface 50 of the insulator 46 in the direction of the Pipeline 14 forward.

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A slightly oversized grommet 51 made of rubber is disposed within the fitting 28 and has a plurality of openings or tubular passages 52a, 52b, 52c, etc., which are aligned with the end contacts 48, respectively. The individual lines 22 are through the passages 52 passed in the bushing and they overlap with the ends 49 of the pins 48 and they are with these for a secure electrical contact by binding, soldering, folding, printing or the like connected accordingly. The bushing 51 is located over the connections of the lines and the ends 49 of the Contact pins 48. The bushing 51 holds the lines 22 in correct alignment with one another and with respect to one another the protruding ends of the pins 48. Furthermore, the bushing 51 ensures a tight overlap of the Connections between each lead and the pins.

The fitting 28 also has an end portion 56 which faces away from the inner shoulder 32 opposite the conduit 14. Furthermore, a bore surface is arranged in the end section, those at 58 in a conically diverging shape from the shoulder region 32 away from the attached cable to an inner cylindrical surface 58a and via an annular shoulder 58b to a larger cylindrical surface 58c tapers to a point. The grommet 51 has a cylindrical surface 57c, an annular shoulder 57b and a slightly conically tapered surface 57. When the annular end surfaces 59 and 45 of the fitting piece 28 and of the annular body 40 abut against one another, if the bushing 51 is slightly oversized, it will be between the surrounding surfaces 58, 58a, 58b and 58c of the fitting, the insulator surface 50 and / or the inner cylindrical

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Surface 45a of annular body 40 compressed, which causes the grommet to cut the lines 22 and sealingly enclose the contact pins 48 for connection. Furthermore, end 59 of the fitting and end 45 of the annular body are in solid metal contact against each other, providing electromagnetic protection for the line or wires themselves at the interface creates between these parts.

The connector 24 also has an annular fastening nut 60 which at one end has an inwardly turned annular lip or flange 62 which rests against a shoulder 64 on the fitting piece 28. The nut 60 has an internal thread 66 which cooperates with the external thread 44 formed on the annular connecting body 40. Thus, the mounting nut 60 can be rotated downwardly into corresponding engagement of the threads 66 and 44 and it is used with the engagement of the flange 62 against the shoulder 64 to lock the spigot 28 in to pull a solid metal contact on ends 45 and 59. The aforementioned process continues to press the bushing 51 into a firm enclosure over the through-going ones Lines 22a, 22b and 22c and the contact pins 49 ending therein.

The connection and coupling assembly 12 also includes, as mentioned above, an outer, annular coupling sleeve 70 which is designed to fit over the outside of the connector body 40. She has an inner shoulder 72 between the shoulder 42 of the annular body 40 and an annular face 73 on the retaining nut 60 is included. Thus, the coupling sleeve 70 is enclosed in the axial direction on the connecting body 40, however, it can differ from the liaison

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body 4-0 rotate freely to establish an external connection with a cooperating coupling or a panel connection, not shown. For example, are common Grooves 7 ^ on the inner surface of the sleeve that are not can accommodate pins shown to form a separable bayonet connection. However makes the special appointment the coupling sleeves do not form part of the invention.

The cooperation between the pipeline 14 and the Connector 24 represents a weatherproof and electromagnetically protected connection, its advantages can be achieved by means of a single fastening nut 60 which cooperates with an annular connecting body 40. The advantages are furthermore due to the compressive pressure in tightly enclosing the through sleeve 51 achieved between the tapered surface 58 of the Fitting piece 28 and the connecting body 40 and the insulator 46 is included. Such benefits will be furthermore through the use of only common components of a line for an unprotected cable in connection with the special adapter 28 which has been described herein. The above-described invention provides represents an economical invention of the component parts and avoids the need to duplicate parts and / or the increase in dimensions and costs that would otherwise occur when using an attached adapter for the common connection of non-protected and protected cables. In addition, the aforementioned Features without significantly changing the details and / or operational characteristics of the link assembly achieved.

Although reference has been made to a wire or conduit, and an electrical wire or an electrical

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Line is shown, it is possible to use the disclosed invention Basic idea to be used without limited modifications wherever lines in the form of pas rods can be used to transmit light.

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Claims (4)

Dipl.-Ing. Dipl.-Chem. Dipl.-Ing. E. Prince - Dr. G. Hauser - G. Leiser Ernsbergerstrasse 19 8 Munich 60 March 21, 1980 BREEZE ILLINOIS, INC. Main and Agard Streets Wyoming, Illinois 61491 /V.St.A. Our reference: B 1586 patent claims 1.Jconnection assembly for a protected cable, marked by a flexible pipe and a number of them in the axial direction within the Pipeline extending conduits through a tubular body and a corresponding number of end contacts in the connection assembly held within the tubular body and the protruding Have ends intended for a connection mi, t corresponding lines, with a fitting has one end that rests smoothly against the tubular body and an opposite end with has tubular extensions which telescopically cooperate with the conduit by means for joint mechanical fastening of the telescopically inserted pipeline and the tubular extension, whereby the adapter has a conically pointed 030048/0576 has running inner bore, which in its size in the Sighting away from the attached cable and diverging to the exposed ends of the end contacts, through a flexible grommet with a corresponding number of through holes, each of which for receiving a line and an end contact is used in an overlapping manner and wherein the bushing is slightly oversized is, but is arranged in the tapered bore of the fitting, and by means that a fastening nut cooperating between the fitting and the annular body to to pull the fitting piece tightly against the annular body, thereby compressing the grommet in both the radial and axial directions to effect against and over the overlapping connections between the end contact ends and the lines. 2. Connection assembly according to claim 1, characterized in that that an insulator the end contacts in the axial direction at a radial distance from each other within of the annular body, the insulator holding a has radial surface against which the through sleeve is pressed when the fastening nut is the spigot member and contracts the annular body. 5. Connection assembly according to claim 2, characterized in that that the ends of the end contacts each protrude from the radial surface of the insulator, and although in one direction to the attached line. 4. Connection assembly according to claim 1, characterized in that that at least part of the elastic bushing is generally cylindrical in its outer shape 030048/0576 is drical and that the through holes in the grommet are generally parallel to each other and run to the longitudinal axis of the cylindrical grommet. Connection assembly according to one of the preceding claims, characterized in that the fitting piece is a Center shoulder facing away from the connector body and towards the cable, and that the fastening nut has an inwardly directed radial lip that rests against the shoulder. 030048/0576