Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/28—Clamped connections, spring connections
  • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
  • H01R4/36—Conductive members located under tip of screw

Definitions

• the invention relates to an arrangement with a connector for at least one electrical cable, that is surrounded by a cover, having an electrical conductor, which has a plurality of individual wires, by which the connector has a pipe shaped clamping body composed of metal to receive the conductors of the cables, in the walls of which at least one position with two threads is provided, mounted with interacting throughholes , the axis V-formed extended at an angle, lying between 100° and 180°, in which in the mounted position the conductor is securely fastened with the clamping screws.
• the words "plurality of individual wires” means in the sense of the invention, that the conductor has at least 100 stranded together or twisted individual conductors.
• the connector can be used for the connection of two electrical cables performing as a pipe. They can be used to attach only electrical cables, also be locked on the front side and there have an outer facing protruding contact element.
• Known arrangements differ substantially through the construction and the arrangement of the clamping screws, which in most cases, perform as shear screws.
• the contact pressure, with which a clamping screw in the mounted position pushes against an electrical conductor, should be as strong as possible and be held longer, so that a stable electrical connection of the electrical conductor from cables, especially from energy cables, ensures that the total required service life can be guaranteed.
• a clamping screw which can be screwed in a threaded hole of a metal body.
• the metal body has a receiving space for receiving a stranded electrical conductor.
• the conductor can, in the mounted position, be secured by means of a clamping screw.
• the point of the clamping screw runs conically and, in fact, extended at an angle of approximately 30°.
• the cone is on its end dull rounded slightly with a small radius.
• the metal body is provided with two holes on the sides through which the pressed individual wires separated by the clamping screw can run around the conductor.
• EP 2 148 392 Al discloses an arrangement with a connector to secure two cables out of flexible electrical conductors.
• the connector has a metal clamping body finished as a pipe piece, which has at least two threaded throughholes to receive the clamping screws.
• a clamping screw on the front side which is intended for the system on each electrical conductor, is mounted a sphere in a recess.
• the sphere is in the recess through its movable secure gap separated from the walls in all directions rotatably arranged and in the work position protrudes over the front side of the clamping screw. Damage to the surface of the conductor is impossible because of the use of these special clamping screws.
• the invention is based on the object that the previously described arrangement is so designed that also flexible electrical conductors with a plurality of individual wires can be securely and completely contacted.
• each of the two clamping screws on their points is rounded with a radius, which lies between 0,15 x D and 0,5 x D, with the diameter D of the threaded part of the clamping screws.
• the two clamping screws which are arranged in the two throughholes of the connector, their axes V- formed running toward each other, on the same side in the clamping body located in the conductor, act on the same area of the same. They push with sufficient force implementing rotation in the conductor, pushing thereby the individual wires compactly together and also against the walls of the clamping body on the opposite side of the throughholes. As a result, it is sufficient for the required electrical contact of all the individual wires of the conductor, if the two described clamping screws are screwed sufficiently tight in the clamping body. On the two oppositely lying clamping screw sides of the clamping body no additional clamping screws are required.
• the individual wires of the conductors are only pushed together going through the two clamping screws, without being damaged or destroyed. This is ensured by the rounding of the point of the clamping screws with a radius from 0,28 x D, where D is the diameter of the threaded part of the clamping screw.
• the arrangement for a flexible electrical conductor would use aluminum or aluminum alloys for their individual conductors.
• One such conductor has, for example, by a cross section from 400mm 2 , approximately 1400 individual wires. Because of the rounded points on the clamping screws this plurality of individual wires is sufficiently compressed enough for an efficient electrical connection.
• One of the aluminum or aluminum alloy wires surrounding thin oxide layer is broken off by the clamping screws with plastic deformation, so that there is an efficient electrical passage of the conductor throughout its cross section.
• the oxide layer of the individual wire can have a maximum thickness of 10mm.
• Figs. 1 and 2 show purely schematically two different clamping bodies for an arrangement according to the invention.
• Figs. 3 to 5 show a sectional view through a usable connector in the arrangement according to the invention.
• Figs. 1 and 2 generally illustrate two different connectors for two electrical cables on one side and for one electrical cable on the other side.
• a clamping body 3 constructed as a pipe composed of tinned aluminum alloy, for example.
• the clamping body 3 has two threaded holes in which in each is arranged a clamping screw 4 provided with an external thread.
• the electrical conductors 5 and 6 of the two electrical cables 1 and 2 protrude into the clamping body 3.
• the conductors 5 and 6 are secured in the clamping body 3 through the clamping screw 4 and thereby electrically conductively connected to each other.
• They are in the preferred embodiment constructed as multi wired conductors and are composed, for example, of aluminum or copper.
• a pipe shaped clamping body 7 which is locked on a front side.
• An electrical contact element sticks out from this front side, which serves to attach an electrical device. Accordingly, only the conductor 6 of the cable 2 is introduced in the clamping body 7 and secured through the clamping screw.
• clamping body 3 Only the clamping body 3 is illustrated in cross section in Figs. 3 to 5. But it could also be the clamping body 7. In the clamping body 3 the electrical conductor 6 is arranged and secured through the two clamping screws.
• the conductor 6 is advantageously composed of a plurality of individual wires of aluminum or an aluminum alloy, that are stranded with each other or generally speaking are meshed.
• the individual wires can, for example, also be composed of copper or another good electrically conductive material. It should have as a high count, at least 300 individual wires.
• the conductor 6 has approximately 1400 individual wires and an electrically effective cross section of approximately 400mm 2 . This embodiment of the conductor 6 also basically applies to the conductor 5.
• the two clamping screws 4 provided with an external thread are screwed into the throughholes 9 and 10 of the clamping body 3, which is equipped with threading.
• the axes Al and A2 of the two throughholes 9 and 10 run V-formed toward each other extended at an angle a, which can lie between 100° and 180°.
• the angle a advantageously lies at 120°.
• the two clamping screws 4 are illustrated in the drawing as shear screws. According to Fig. 6, they have a rounded point 11 with which it lies against conductor 6 in the mounted position.
• the point 6 of the clamping screw 4 can be rounded with a radius R, which can lie between 0,15 x D and 0,5 x D.
• D is the diameter of the threaded part of the clamping screws 4.
• the radius R with the point 11 of the clamping screws 4 is rounded and lies advantageously at 0,28 x D.
• the clamping screws 4 are rotated on their axes. As a result, they push into the conductor 6 and push the individual wires of the same together and, because of their inclined path relative to each other, into the same area of the conductor 6. At the same time, the individual wires are pushed together and because of the rounded point 11, the clamping screws are not damaged. Only the oxide layer surrounding the individual wires will be broken off.
• the final position of the clamping screws 4 is illustrated in Figs. 4 and 5 where, according to Fig. 5, the top part of the clamping screws 4 is sheared off.

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Citations (5)

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• 2015
  • 2015-07-24 EP EP15306210.4A patent/EP3121903B1/de active Active
• 2016
  • 2016-07-07 WO PCT/EP2016/066062 patent/WO2017016836A1/en active Application Filing
  • 2016-07-07 CA CA2993124A patent/CA2993124A1/en not_active Abandoned
  • 2016-07-07 AU AU2016299188A patent/AU2016299188A1/en not_active Abandoned
  • 2016-07-07 CN CN201680043500.0A patent/CN107851908A/zh active Pending

Patent Citations (5)

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