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
  • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
  • H01R4/40—Pivotable clamping member
• • 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
  • H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
• • 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
  • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
  • H01R4/5008—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using rotatable cam
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
  • H01R9/22—Bases, e.g. strip, block, panel
  • H01R9/24—Terminal blocks
  • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
• • 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
  • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
  • H01R4/505—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using an excentric element

Definitions

• the invention relates to a parallel screw according to the preamble of the independent main claim 1 and a method for electrical contacting of an electrical conductor with a busbar according to the preamble of the independent independent claim 15th
• Such screw terminals are preferably used in terminal blocks, which in turn find use, for example in control cabinets.
• Such a screw is used within such terminal blocks of contacting an electrical conductor, in particular a stripped portion of an electrical cable, with a busbar.
• the screw has a terminal screw, the axis of space parallel to the inserted electrical conductor and usually runs parallel to the busbar, resulting in the naming "parallel screw" derived.
• the document DE891 1218U1 describes a corresponding electrical Druckschreibunselement for a terminal.
• a clamping device for the connection of electrical conductors which has a clamping body which is bent from a sheet metal strip and has a self-contained form.
• the clamping device further comprises a displaceable by means of a clamping screw pressure transmitting member, which is designed as a loose, guided only by the clamp body clamp on one end of a clamping screw acts when pressed the clamping bracket about a pivot point in a recess of the clamp body or loosely on a any bearing point of the clamp body interior is provided on a retaining lug, is displaced in the direction of the conductor insertion channel.
• the inserted conductor between clamping body inner edge and clamping bracket is clamped.
• Clamping bracket which is displaceable by means of a clamping screw in the direction of a Porterein enclosureskanales and designed for clamping the inserted conductor to the sprag inner edge and / or a busbar, wherein the clamping bracket has a retaining lug, which in the traction between the clamping bracket and inserted conductor substantially between the clamping bracket and Head occurring forces absorbs, such that the pendulum bearing between clamp and clamp body of forces is relieved parallel to the clamping screw direction.
• a disadvantage of this prior art is that while the power transmission from the terminal screw on the electrical conductor, in particular special depending on the cross section of the inserted electrical conductor, is not optimal.
• the object of the invention is therefore a parallel
• Specify screw which is on the one hand as variable as possible with respect to the cross section of the electrical conductor, and in particular independent of the cross section of the electrical conductor ensures the best possible power transmission between the screwing and the pressing force.
• the object is achieved by a method of the type mentioned by the features of the characterizing part of the independent subsidiary claim 15.
• the screwing force denotes that force which exerts the connection screw on the clamping body.
• the pressure force is ideally perpendicular to it and denotes the force with which the electrical conductor is pressed by the clamp body against the busbar.
• the quality of the power transmission is given by the quotient of screw force and pressure force.
• parallel screw connection is to be understood as meaning an electrical connection which is intended to connect an inserted electrical conductor, preferably an electrical cable, at its stripped-off region, for example to a busbar in an electrically conductive manner, the axis being that to the screw connection belonging Terminal screw parallel to the inserted electrical conductor runs.
• the force vector which is created by screwing in the terminal screw and is therefore initially directed parallel to the axis thereof, therefore, must be deflected, for example by a clamping body, ideally perpendicular to its original direction. As a result, the clamping body presses the electrical conductor with which it is in direct mechanical contact by screwing in the connecting screw, against which the busbar, whereby a generally very good conductive electrical contact between the electrical conductor and the busbar is established.
• the screw connection can have a connection housing which has a first opening on a first side and has a second opening on a second side opposite the first side.
• the first opening may be provided for insertion of one of the two ends of the bus bar; the second opening can serve to receive the electrical conductor.
• the bus bar and the electrical conductor in particular the electrical cable with its associated stripped area, can be inserted from opposite directions into the terminal housing and electrically contact each other therein.
• connection housing may have on its second side a circular screw opening, which preferably has an internal thread.
• the terminal screw may already be at least partially screwed in the non-contacting state.
• the terminal screw is screwed in from the same direction, from which also the electrical conductor, in particular the stripped area of the electric cable, is inserted, so that it the screw connection is a parallel screw connection.
• the present invention has the advantage that an optimal contact pressure can also be ensured independently of the respective cable cross section.
• Another advantage is that an electrical cable that is to be contacted with the busbar, need only be stripped in a relatively short area, which facilitates the manual operation.
• the guaranteed by the good power transmission high contact pressure allows safe installation and stable contact even over a relatively long period of time and in particular under the action of vibration.
• the clamping body is designed symmetrically, in particular this symmetry with respect to a rotation about its axis of rotation by a discrete angle, it is then an n-fold rotational symmetry, because it ensures the same power transmission even in different rotational positions and thus can apply the same pressure force.
• the clamping body is mounted in the connection housing such that it can perform both a translational movement and a rotational movement relative to the connection housing.
• the clamping body has symmetrical to its axis of rotation a preferably cylindrical wheel axis which is slidably mounted in a slot or in a plurality of slots of the connection housing, because thereby the translational movement in the form of a displacement of the Klemmköpers in the direction of the electrical conductor and also a rotational movement about its axis of rotation is made possible.
• This variable adjustment of the position of the clamp body finally allows an equally high pressure force on electrical conductors of different diameters, in particular cables of different cross sections.
• the axis of rotation designates the idealized axis about which the Klemmgroper rotates.
• the wheel axle denotes the mechanically present, preferably cylindrical, axle, which is formed or attached to the clamping body.
• the clamping body is designed as a gear, wherein the teeth of the gear each have two edges, of which a first edge may have a concave shape and a second edge may have a convex shape.
• the concave shape is particularly well suited to provide the terminal screw a suitable point of attack, via a sufficiently large rotation and a sufficiently large displacement range of the gear.
• the convex shape is particularly well suited to press the electrical conductor against the busbar by rotating the gearwheel always with a surface element directed at right angles to the electrical conductor.
• the gear which in this case represents the clamping body, has an n-fold rotational symmetry, since it has the same shape when rotated about its axis of rotation by a discrete angle ⁇ .
• the clamping body in particular the gearwheel, additionally also has a mirror symmetry with respect to its axis of rotation, and is therefore also designed to be axially symmetrical.
• the clamping element is able to be moved by screwing the terminal screw, in particular in a translational movement, in the direction of the electrical conductor and thus to be contacted busbar.
• This displacement can be made possible, for example, by virtue of the terminal housing each having a slot on a third and an opposite fourth side, which are preferably arranged perpendicularly to the first and second side, wherein these two slots mirror each other. are arranged opposite each other and preferably run in a straight line.
• the clamping body which is preferably the toothed wheel, can have a cylindrical passage opening, in particular symmetrically about its axis of rotation.
• this passage opening may be introduced a preferably designed as a cylindrical pin wheel axle.
• a cylindrical wheel axle can be formed on both sides of the clamping body, in particular about its axis of rotation, so that the clamping body can also be made in one piece together with the wheel axle.
• the wheel axle can thus engage on both sides in the respective slot, wherein the diameter of the wheel axle preferably corresponds to the width of the slot.
• the Klemmgroper is on the one hand displaceable and on the other hand additionally held rotatably about its axis of rotation in the connection housing.
• the slots can also be curved, for example in the form of an ellipse. Preferably, however, the slots are straight. In particular, the direction of the rectilinear slots is inclined to the busbar.
• connection screw in the Y direction.
• ⁇ is greater than 0 °, preferably greater than 10 °, particularly preferably greater than 20 °, in particular greater than 25 °, so for example 30 ° and can be more.
• Farther ⁇ can be smaller than 60 °, preferably smaller than 50 ° and in particular smaller than 45 °.
• the angle is accordingly (90 ° -).
• the angle ⁇ between the tangent to the corresponding curve shape in the bearing point and the X-axis can be measured.
• the bearing point is that point of the slot at which the wheel axle is located and in which it is in mechanical contact with the third or fourth side of the connection housing.
• a particular advantage of the oblique course of the slot is that the side parts in the region of the bearing point can at least partially receive a counterforce to the pressing force. It is thus particularly advantageous that, on the one hand, at least part of the counterforce to the pressure force can be absorbed by the bearing, that is to say by the third and fourth side part in the region of the slot, since this allows a particularly good transmission of force. At the same time a particular transverse displacement of the clamp body is nevertheless possible, whereby the same particularly good power transmission is ensured even for different sized cable cross-sections.
• the clamping body When screwing in the terminal screw, the clamping body is first moved in the direction of the electrical conductor and the busbar and rotates advantageously such about its axis of rotation that the terminal screw on the clamping body, preferably on the convex side of a tooth of the gear finds a suitable attack surface. Accordingly, the relative position between the Clamping body and the electrical conductor, regardless of the respective cable cross-section remain the same. Then, by the rotation of the clamping body, in particular the gear, the pressing force against the electrical conductor, in particular the stripped portion of the electric cable, applied and thus presses the cable against the busbar. At the concave edge of the respective tooth of the gear, the terminal screw always finds a suitable point of attack, so that the same good power transmission is ensured even for different positions of the gear.
• the screw force vector Fy1 counteracts a force vector Fy2 picked up by the bearing together with a frictional force vector Fy3 of the clamping body on the electrical conductor:
• the screwing force and the frictional force of the clamping body on the connecting screw are also connected to one another via the material-specific friction coefficient ⁇ :
• Fx3 Fy1 ( 2 sina + 2 cosa + sina) / ( 2 cosa + 2 sina + cosa)
• the clamping body can be made of steel.
• ⁇ 0.2.
• the angle ⁇ is between the axis A and a plane which is aligned perpendicular to the screw axis.
• the axis A is the axis of the linear slot or the tangent to the curved slot in the bearing point.
• an angle ⁇ can be assumed as a realistic value, for example, 30 °.
• the design is not limited to the use of steel.
• brass, copper, aluminum, plastic, ceramic, or any other suitable material may be used instead. This material also does not necessarily have to be electrically conductive.
• the slot length is preferably smaller than the sum of this radius of the gear and the diameter of the terminal screw. Furthermore, it is advantageous if the slot extends between the axis of the terminal screw and the busbar and begins, for example, in the region of the screw axis.
• the slot length is less than or equal to the diameter of the terminal screw.
• FIG. 1 An embodiment of the invention is illustrated in the drawings and will be explained in more detail below.
• FIG. 1 a perspective view of a terminal block; a perspective view of a segment of a terminal block; an unassembled screw connection with connection housing and separate gearwheel, wheel axle, connection screw and busbar in an exploded view;
• Fig. 7 The connection housing in the side view with a rectilinear slot and an indicated axis of the slot.
• the figures contain partially simplified schematic representations. In part, identical reference numerals are used for the same but possibly not identical elements. Different views of the same elements could be scaled differently.
• Fig. 1 shows a terminal block with an insulating body 1, consisting of a plurality of segments 1 1.
• Each segment 1 1 has a plurality of cable entries 1 1 1 and each cable entry 1 1 1 a
• Fig. 2 shows in particular a single segment 1 1 of the insulating body 1 in cross section with four exemplarily inserted therein busbars 2 and four also exemplary inserted parallel screw terminals 3, each with a terminal housing 31 and a terminal screw 32, wherein one end of the respective busbar 2 in the respective terminal housing 31 of the screw terminal 3 is arranged.
• the respective busbar 2 is at least partially disposed in the segment 1 1 of the insulating body 1 and thus also in the insulating body 1.
• the respective busbar 2 is at least partially disposed in the respective terminal housing 31 of the screw terminal 3.
• connection housing 31 shows an unassembled screw connection 3 in an exploded view, together with a busbar 2 to be inserted into the connection housing 31 belonging to the screw connection 3.
• the connection housing 31 may preferably be formed as a stamped and bent part.
• the terminal housing 31 has in a first side, which is covered by the terminal housing 31 and therefore can not be seen in the drawing, a first opening, which is accordingly also not visible in the drawing.
• the terminal housing 31 has a second opening 314 disposed in a first side opposite the second side 317.
• a screw opening 316 is arranged, which has an internal thread ,
• For power connection 3 also includes a terminal screw 32, which fits into the screw 316.
• the terminal housing 31 Perpendicular to the first and second sides 317, the terminal housing 31 has a third side 318 and a fourth side 319. These two sides 318, 319 each have a preferably rectilinear slot 315, the two slots facing each other symmetrically. In the drawing, only one slot 315 can be seen, because the other is covered by the terminal housing 31.
• the screw connection 3 includes a clamping body, in particular a gear 33, which preferably has a plurality of teeth 331 each having a concave and a convex edge.
• the gear 33 has a cylindrical passage opening 332 in its center.
• the gear wheel 33 has a wheel axle 333, which has a cylindrical shape and can be inserted into the passage opening 332 in a form-fitting manner.
• the wheel axle 333 is positively inserted into the cylindrical passage opening 332 of the gear 33 and the gear 33 is slidably and rotatably supported with this wheel axle 333 in the slots 315 of the connection housing 31. In this way, the gear 33 is disposed in the terminal housing 3.
• the connecting screw 32 is partially way screwed into the screw hole 316.
• an electrical cable 4 with a stripped area 41 is shown as an electrical conductor.
• the busbar 2 is already inserted through the first opening in the terminal housing 31.
• the electrical cable 4 is intended to be inserted with its stripped region 41 through the second opening in the terminal housing.
• Through the slot 315 a part of the gear 33 can be seen. Furthermore, it is shown how the gear 33 with the wheel axle 331 in the slot 315 is rotatably and slidably held.
• Fig. 5a shows the same arrangement in a cross section.
• the terminal screw 32 is screwed as deep as it is necessary for a first mechanical contact of the gear 33.
• the gear 33 When screwing in the terminal screw 32, the gear 33 first shifts in the direction of the stripped area 41 of the electric cable 4 to be contacted. Whether the gear wheel 33 thereby automatically performs an additional rotational movement is irrelevant in this case; it is important that the gear 33 in this case in any case also has a movement proportion corresponding to a translational movement, i. that the axis of rotation of the gear 33 in the form of its wheel axis 331 along the slot 315 in the direction of the electrical conductor, namely in this case the stripped portion 41 of the electric cable 4, and thereby of course also in the direction of the busbar 2 moves.
• the terminal screw 32 exerts a corresponding force on the gear 33 from.
• This screwing force acts in particular on a tooth of the gear 33 and in particular on the convex edge of a tooth of the gear 33.
• the gear 33 exerts via a rotational movement of a corresponding force on the electrical conductor, in particular on the electrical cable 4 at its stripped part 41, and thus presses this against the busbar second
• FIG. 5b shows, in a representation comparable to FIG. 5a, the electrical cable 4 inserted into the terminal housing 31 with its stripped area 41.
• the terminal screw 32 is finally screwed in for contacting.
• busbar 2 on the one hand and the electrical conductor, in particular the electrical cable 4 are introduced with its stripped part 41, on the other hand from opposite directions in the terminal housing.
• the electrical cable 4 and the busbar run parallel within the terminal housing and continue parallel to the axis of the terminal screw.
• FIG. 6 shows the equilibrium of forces in the screw connection for the aforementioned state, in which therefore the terminal screw 32 is screwed in and the electrical contact between the electrical conductor, in particular the stripped part 41 of the electric cable 4 and the busbar 2, is finally established.
• the electrical cable 4 and the busbar 2 are not shown in this illustration for reasons of clarity.
• the screw force vector Fy1 counteracts a force vector Fy2 picked up by the bearing together with a friction force vector Fy3, the friction force vector Fy3 describing the frictional force between the clamping body and the electrical conductor:
• the pressure force vector Fx3 counteracts a force vector Fx2 received by the bearing together with a friction force vector Fx1, wherein the friction force vector Fx1 describes the frictional force between the connection screw and the clamping body:
• the pressure force and the frictional force of the clamp body on the cable are connected to each other via the material-specific friction coefficient ⁇ :
• the screwing force and the frictional force of the clamping body on the connecting screw are also connected to one another via the material-specific friction coefficient ⁇ :
• Fx2 Fy2 (sin30 o + MCOs30 °) / (cos30 o + Msin30 °)
• Fx3 Fy1 ( 2 sina + 2 cosa + sina) / ( 2 cosa + 2 sina + cosa)
• the clamping body can be made of steel.
• a material-specific friction coefficient ⁇ of approximately 0.2 results for the use of such a clamp made of steel.
• the design is not limited to the use of steel.
• brass, copper, aluminum, plastic, ceramic, or any other suitable material may be used instead.
• angle ⁇ for example, 30 ° can be assumed.
• FIG. 7 shows the connection housing 31 in a side view.
• the rectilinear slot 315 is clearly visible.
• its axis A is easily recognizable and has an angle ⁇ of 30 ° with the X-axis of the said coordinate system.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
• Connections Arranged To Contact A Plurality Of Conductors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52595009

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (5)

Citations (2)

Family Cites Families (17)

• 2014
  • 2014-03-20 DE DE102014103826.6A patent/DE102014103826A1/de not_active Withdrawn
• 2015
  • 2015-01-21 RU RU2016141059A patent/RU2016141059A/ru not_active Application Discontinuation
  • 2015-01-21 US US15/116,792 patent/US20170005420A1/en not_active Abandoned
  • 2015-01-21 CN CN201580014898.0A patent/CN106104926A/zh active Pending
  • 2015-01-21 WO PCT/DE2015/100027 patent/WO2015139682A1/de active Application Filing
  • 2015-01-21 KR KR1020167028222A patent/KR20160132448A/ko not_active Application Discontinuation
  • 2015-01-21 EP EP15706667.1A patent/EP3120420A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

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