The present application is a 373 national phase filing of International Application No. PCT/EP2014/073596, entitled “Electrical Connector with a Sheath Clamp”, filed Nov. 3, 2014, which claims priority to German Patent Application No. 10 2013 112 083.0, entitled “Elektrischer Verbinder mit einer Mantelklemme”, filed Nov. 4, 2013, and to German Patent Application No. 10 2013 112 084.9, entitled “Anschlussvorrichtung mit einem elektrischen Verbinder”, filed Nov. 4, 2013.
Some sheath clamps have a sheath formed as a cap nut. A pressure piece, which is rotatably connected to the sheath, is locked relative to a base by means of screw locking means. The sheath clamp allows two stripped wire ends to be fixed in an antiparallel alignment. However, this form of conductor feed does not permit connection of another conductor in the perpendicular direction with a small installation space requirement.
The present disclosure relates to an electrical connector for electrically contacting an electrical conductor having a sheath clamp for inserting the electrical conductor. The objective of the present disclosure is therefore to provide an electrical connector for electrically contacting electrical conductors which has minimal installation space requirements and which permits additional connections.
This objective is achieved by means of the subject matter and the features in accordance with the independent claims. Advantageous embodiments are the subject matter of the dependent claims, the description and the drawings.
According to a first example, the objective is achieved by means of an electrical connector for electrically contacting an electrical conductor having a sheath clamp for inserting the electrical conductor, a plug contact pin for fitting onto a socket and a contact bridge, on which the sheath clamp and the plug contact pin are secured. By means of the combination of a sheath clamp with a pin-socket contact and a busbar as the contact bridge, the technical advantage is achieved, for example, that the connection and distribution functions of the sheath clamp for the parallel introduced/fed through flexible conductors and the plugging functions of the pin-socket contact are offset and are situated in different planes, without interfering with one another during assembly.
The electrical connector can be used, for example, in a functional automation technology component, for example in a component construction system, in particular in a fieldbus system.
In an advantageous embodiment of the electrical connector, the sheath clamp is electrically connected to the contact bridge, in particular screwed on, riveted, pressed on or spot welded. This results in the technical advantage, for example, that a rigid connection can be established in a simple technological manner between the sheath clamp and the contact bridge.
In another advantageous embodiment of the electrical connector, the contact bridge comprises a sheath clamp aperture for the electrical connection with the sheath clamp. This results in the technical advantage, for example, that the sheath clamp can be inserted into the contact bridge.
In another advantageous embodiment of the electrical connector, the sheath clamp comprises a setscrew for attaching the sheath clamp to the contact bridge by means of a nut. Alternatively, attachment can be realized by means of a rivet, a pressing operation or spot welding. This results in the technical advantage, for example, that the inserted sheath clamp can be attached in a simple manner.
In another advantageous embodiment of the electrical connector, a disk spring is disposed between the nut and the contact bridge. This results in the technical advantage, for example, that an unintentional release of the sheath clamp is prevented.
In another advantageous embodiment of the electrical connector, the contact bridge comprises a pin aperture for inserting the plug contact pin. This results in the technical advantage, for example, that the plug contact pin can be attached in a simple manner.
In another advantageous embodiment of the electrical connector, the pin aperture comprises radial cavities. This results in the technical advantage, for example, that yielding sections are created around the pin aperture, which facilitate insertion of the plug contact pin.
In another advantageous embodiment of the electrical connector, the sheath clamp comprises a sheath clamp bottom part and a screw-on sheath clamp top part. This results in the technical advantage, for example, that the electrical conductor can be attached in a simple manner.
In another advantageous embodiment of the electrical connector, the sheath clamp bottom part comprises a U-shaped cavity for inserting the electrical conductor. This results in the technical advantage, for example, that the conductor is surrounded by the sheath clamp bottom part and can be reliably clamped.
In another advantageous embodiment of the electrical connector, the U-shaped cavity is slanted at the top in order to allow simple insertion of the pressure piece.
In another advantageous embodiment of the electrical connector, the sheath clamp top part comprises a receiver for a turning tool, in particular a slot, a groove, a hexagonal head or a hexagonal hole for the insertion of a turning tool. This results in the technical advantage, for example, that a high contact pressure can be generated on the electrical conductor.
In another advantageous embodiment of the electrical connector, the sheath clamp top part is formed with a sleeve-like shape for receiving the sheath clamp bottom part. This results in the technical advantage, for example, that a reliable electrical connection between the conductors can be established.
In another advantageous embodiment of the electrical connector, the sheath clamp top part comprises a pressure piece rotatably mounted on the inside. This results in the technical advantage, for example, that the pressure piece can be pressed onto the electrical conductors in the U-shaped cavity.
In another advantageous embodiment of the electrical connector, the sheath clamp top part comprises a rigid pressure pin on the inside. This results in the technical advantage, for example, that the pressure pin can be pressed onto the electrical conductors.
In another advantageous embodiment of the electrical connector, the plug contact pin comprises a tapered section for insertion into the pin aperture. This results in the technical advantage, for example, that jamming during mounting of the plug contact pin is prevented.
In another advantageous embodiment of the electrical connector, the plug contact pin comprises a stop section so as to form a stop when the plug contact pin is inserted into the pin aperture. This results in the technical advantage, for example, that the plug contact pin can be inserted precisely into the intended position.
In another advantageous embodiment of the electrical connector, the plug contact pin extends parallel to the sheath clamp. This results in the technical advantage, for example, that electrical conductors can be fed into the sheath clamp from the sides, and a socket for establishing another electrical contact can be fitted onto the plug contact pin from above.
According to a second example, the objective is achieved by means of a connection device having an electrical connector for connecting electrical conductors, which comprises a sheath clamp and a plug contact pin, and a contact support for receiving the electrical connector, which comprises a sheath clamp aperture for the insertion of the electrical conductor into the sheath clamp and a plug aperture for fitting a socket onto the plug contact pin. The connection device comprises a feed channel between the sheath clamp aperture and the sheath clamp. This results in the technical advantage, for example, that the connection and distribution functions of the sheath clamp for the introduced/fed through flexible conductors are arranged in a compact manner and greater compression of the wiring space is obtained compared with the use of installation boxes with multipolar standard clamps and bridges.
The connection device can, for example, be used in a functional automation technology component, for example in a component construction system, in particular in a fieldbus system.
In an advantageous embodiment of the connection device, the sheath clamp aperture is disposed on a side wall of the contact support. This results in the technical advantage, for example, that the electrical wire can be fed in a simple manner when the connection device is mounted on a wall.
In another advantageous embodiment of the connection device, the contact support comprises a first sheath clamp aperture on a side wall and a second sheath clamp aperture on an opposite side wall. This results in the technical advantage, for example, that a continuous feed channel for connecting electrical conductors is created.
In another advantageous embodiment of the connection device, the plug aperture is disposed on a top side of the contact support. This results in the technical advantage, for example, that a plugging technology branch is enabled perpendicular to the wiring plane.
In another advantageous embodiment of the connection device, the contact support comprises an insulating marking cap for fitting onto a sheath clamp top part of the sheath clamp. This results in the technical advantage, for example, that different colored marking caps can be used to identify individual connections and touch protection is improved.
In another advantageous embodiment of the connection device, the insulating marking cap comprises a thumb wheel profile. This results in the technical advantage, for example, that the sheath clamp top part can be manually actuated.
In another advantageous embodiment of the connection device, the insulating marking cap comprises a cavity for accessing a groove of the sheath clamp top part of the sheath clamp. This results in the technical advantage, for example, that both a turning tool and a measuring tip for tapping a voltage can be inserted into the sheath clamp top part.
In another advantageous embodiment of the connection device, the contact support comprises a screw channel for the insertion of the rotatable sheath clamp top part of the sheath clamp. This results in the technical advantage, for example, that the sheath clamp top part is fed in a touch-safe manner in the connection device.
In another advantageous embodiment of the connection device, the contact support comprises a color marking cartridge for insertion into the screw channel. This results in the technical advantage, for example, that a user-specific color identification and labeling of the connection areas is obtained.
In another advantageous embodiment of the connection device, the contact support comprises a housing top part and a housing bottom part. This results in the technical advantage, for example, that a modular construction of the connection device is obtained and the housing top part and the housing bottom part can be injection molded parts.
In another advantageous embodiment of the connection device, the electrical connector is inserted with the plug contact pin into a cavity in the housing bottom part. This results in the technical advantage, for example, that the electrical connector can be supported at a primary point when the connection device is assembled.
In another advantageous embodiment of the connection device, the housing top part and the housing bottom part are engaged with one another. This results in the technical advantage, for example, that the connection device can be produced in a simple manner.
In another advantageous embodiment of the connection device, the electrical connector is fixed between the housing top part and the housing bottom part. This likewise results in the technical advantage, for example, that the connection device can be produced in a simple manner.
In another advantageous embodiment of the connection device, the contact support comprises an elastomer element for fixing the electrical conductor in the sheath clamp aperture. This results in the technical advantage, for example, that the electrical conductor can be clamped in a feed channel.
In another advantageous embodiment of the connection device, the contact support has a plurality of receivers for each electrical connector. This results in the technical advantage, for example, that a plurality of electrical wires can be connected with a single connection device.
Additional examples are explained with reference to the accompanying drawings, in which:
The contact support 201 comprises a housing top part 201 and a housing bottom part 203. The electrical connectors are inserted and fixed between the housing top part 201 and the housing bottom part 203. Engagement means are disposed in the housing top part 201 and the housing bottom part 203 for engaging the housing top part 201 with the housing bottom part 203.
The electrical connectors each comprise a sheath clamp and a plug contact pin 109. The sheath clamp enables the connection of several non-terminated fine-wire conductors having different cross sections without impairment of visual clarity in a mounting area.
The housing top part 201 comprises several sheath clamp apertures 205, by means of which the electrical conductors can be introduced laterally into the sheath clamps of the electrical connectors. The sheath clamp apertures 205 are disposed on the side wall of the contact support. The connection device 200 comprises a feed channel between the sheath clamp aperture 205 and the sheath clamp. On the top side of the housing top part 201 there are several plug apertures 207, which are used for establishing an electrical connection by means of the plug contact pin 109.
In order to open and close the sheath clamp mounted on the inside of the contact support 201 and 203, a rotatable marking cap 209 is provided, which is placed on a sheath clamp top part. The marking cap 209 can be replaced by a user so that, depending on a used color of the marking cap 209, a conductor type can be identified. The marking cap 209 is formed from an electrically insulating material and is used for fitting onto the sheath clamp top part 105 of the sheath clamp 103, 105.
The marking cap 209 comprises an edge with a thumb wheel profile 211, allowing the marking cap to be manually turned with maximum grip by a user. Adjacent thereto, the marking cap 209 comprises a cavity 213 for accessing a groove of the sheath clamp top part of the sheath clamp.
A color marking cartridge 217 is inserted into a screw channel for the sheath clamp, which cartridge can be replaced by a user according to the desired color. The color marking cartridges 217 permit a color identification and labeling of the connection areas.
Cylinder-shaped elastomer elements 219, which hold the electrical conductors in position, are disposed at the point of entry of the conductors into the contact support 201. The elastomer elements 219 are fitted to the different conductor diameters through their particular shape and their internal construction. A counterforce is generated by means of the wall of the upwards outgoing pin contact of the double plug outlet.
The color marking cartridge 217 is displaceably disposed in the screw channel on that, when the marking cap 209 is closed, the color marking cartridge 217 is simultaneously moved towards an elastomer element 219. The color marking cartridge 217 thus additionally serves as a compression device for the elastomer element 219.
The elastomer element 219 is disposed laterally in the sheath clamp aperture 205, so that an inserted conductor is situated between an internal wall of the sheath clamp aperture 205 and the elastomer element 219. If the elastomer element 219 is compressed from above by the color marking cartridge 217, the elastomer element expands laterally and thus fixes the inserted electrical conductor in place. A central cavity 221 on the inside of the elastomer element 219 facilitates the lateral expansion of the elastomer element 219.
The term “elastomers” is understood to mean dimensionally stable, but elastically deformable plastics, the glass transition temperature of which is below the operation temperature. The elastomers can elastically deform with tension and compression, but subsequently return to their original undeformed shape. The elastomer can be produced from a material that contains natural rubber and/or silicone rubber.
The connection device 200 enables a connection and a reconnection of two or more cut, fine-wire electrical conductors of a main circuit without appreciable transition resistance and with low thermal losses. In addition, the plug contact pin 109 creates an open clamping area, in which the conductor feeding direction runs perpendicular to the conductor instead of in the conductor direction. The arrangement of the plug contact pin 109 enables contacting at additional assembly and installation planes. The connection device 200 comprises five electrical connections with the respective connectivity options. The connection device 200 permits a compression of the wiring space compared with the use of installation boxes with multipolar standard clamps and bridges and enables a plugging technology branch from the multipolar conductor clamping area perpendicular to the wiring plane.
A first sheath clamp aperture 205 is disposed on a side wall and a second sheath clamp aperture 205 is disposed on an opposite side wall, so that these form a continuous feed channel for the insertion of an electrical conductor into the contact support 201. The contact support 201 comprises a sheath clamp aperture 205 having a first elastomer element 219 on its side wall and a second sheath clamp aperture 205 having a second elastomer element 219 on the opposite side wall.
Feed channels for the insulated conductors thus extend on both sides up to the clamping point embedded in the contact support 201. Fine-strand and non-terminated wires of different cross sections can be inserted into the feed channels. A stripped conductor inserted into the open clamping point is held in position in the feed channel, while additional conductors can be inserted into the clamping point. The conductors can be inserted and held from both sides.
The housing top part 201 comprises the screw channels 15, into which the color marking cartridges 217 are inserted together with the sheath clamp top parts 105 and the color marking cartridges 217. The contact support 201,203 thus comprises the screw channel 215 for the insertion of the rotatable sheath clamp top part 105 of the sheath clamp 103, 105.
In addition, the housing top part 201 comprises spikes 225 for fitting the elastomer elements 219 onto it. For this purpose, the elastomer elements 219 also have a continuous cavity 227, into which the spikes 225 are inserted. The spikes 225 and the cavities 227 have a cruciform cross section, so that twisting of the elastomer elements 219 is prevented. The elastomer elements 219 have a cylindrical basic shape. When the connection device has been assembled, the spikes 225 extend into the color marking cartridges 217. For this purpose, the color marking cartridges 217 have a corresponding cavity. It is thus possible to prevent any bending of the spikes 225.
For each electrical connector 100, the housing bottom part 203 comprises a cavity 229, into which a lower section of the plug contact pin 109 is inserted. The electrical connector 100 is inserted with the plug contact pin 109 into the housing bottom part. This allows the electrical connectors 100 to be supported at a primary point in the housing bottom part 203 and the assembly of the connection device 200 is simplified with respect to putting together the individual components.
On the top side of the sheath clamp aperture 205 there is a groove 128 or similar means for the insertion of a turning tool, such as a screwdriver, for example.
The plug contact pin 109 comprises a tapered section 127 and a stop section 129. The tapered section 127 becomes broader in the direction of the stop section 129, so that this has increasing purchase when inserted into the pin aperture 121. The stop section 129 forms a stop when the plug contact pin 109 is inserted, so that the plug contact pin 109 can be secured in the envisaged position.
Cavities 123 are disposed radially around the pin aperture 121 and, by means of these cavities, elastic sections are created around the pin aperture 121 in the contact bridge 111, which yield slightly when the tapered section 127 is inserted and fix the plug contact pin 109 to the contact bridge 111.
The sheath clamp bottom part 103 comprises a U-shaped receiver 107 for the insertion of the electrical conductors. In addition, the sheath clamp bottom part 103 comprises a setscrew 115 with an external thread section, which is inserted into the sheath clamp aperture 113 of the contact bridge 111. The sheath clamp bottom part 103 is then secured to the contact bridge 111 by means of a nut 117 and a disk spring 119.
The sheath clamp top part 105 is screwed onto the sheath clamp bottom part 103, so that the inserted electrical conductors are clamped between both parts. In order to screw the sheath clamp top part 105 to the sheath clamp bottom part 103, the groove 125 is provided on the top side, into which groove a screwdriver can be inserted.
When the electrical connector 100 is mounted in the contact support 203, the stop section 129 is inserted into the cavity 229 in the housing bottom part 203 in a form-fitting manner. For this purpose, the stop section 129 has spring segments 133 on the bottom side, which are pressed together on insertion and hold the plug contact pin 109 in the cavity 229.
The connection device 200 can be used in the field as space-saving cable installation technology for extra-low voltage and low voltage devices. In addition, this provides a plug connection and a potential transfer for modular and stackable housings. The connection device 200 constitutes a holistic design concept, by means of which an advantageous energy distribution is obtained in the field, i.e. outside of a control cabinet.
The connection device 200 with the contact support 201, 203 serves to guide and retain the individual conductors without impairment of visual clarity in the mounting area. In particular, a clamping space is created that is open from above and accessible from both sides. A high level of fault safety is achieved thanks to clearly organized wiring and colored identification and simple visual inspection is possible following successful installation. In addition, the individual conductors of different cross sections can be positioned, guided and retained in the contact support 201, 203.
The connection device 200 provides a high level of touch protection in the installed state with touch-safe measuring points at all potentials. A combination of a multiple clamping point for non-terminated wires with double plug technology is obtained. The contact support 201, 203 can be easily expanded with a five-pole star distributor for up to eight five-pole cables. Globally, a space-saving cable installation technology for general junction and distribution boxes is provided. In addition, assembly support is provided in junction and distribution boxes with a large number of conductors and optimized wiring.
All features explained and depicted in connection with individual examples can be envisaged in different combinations in the subject matter according to the present disclosure in order to also produce their advantageous effects.
The scope of protection of the present invention is described by the claims and is not limited by the features explained in the description or depicted in the figures.
Number | Date | Country | Kind |
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10 2013 112 083 | Nov 2013 | DE | national |
10 2013 112 084 | Nov 2013 | DE | national |
Filing Document | Filing Date | Country | Kind |
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PCT/EP2014/073596 | 11/3/2014 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2015/063305 | 5/7/2015 | WO | A |
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Entry |
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ISA/EP, International Search Report, Int'l Application No. PCT/EP2014/073596, Feb. 2, 2015, European Patent Office, Rijswijk, NL, 12 pgs. |
Number | Date | Country | |
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20160268705 A1 | Sep 2016 | US |