EP0279916B1 - Anschlussklemmeinrichtung, insbesondere für Drosseln oder Transformatoren - Google Patents

Anschlussklemmeinrichtung, insbesondere für Drosseln oder Transformatoren Download PDF

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Publication number
EP0279916B1
EP0279916B1 EP87117009A EP87117009A EP0279916B1 EP 0279916 B1 EP0279916 B1 EP 0279916B1 EP 87117009 A EP87117009 A EP 87117009A EP 87117009 A EP87117009 A EP 87117009A EP 0279916 B1 EP0279916 B1 EP 0279916B1
Authority
EP
European Patent Office
Prior art keywords
terminal
terminal device
casing
insert
clamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87117009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0279916A2 (de
EP0279916A3 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vossloh Schwabe GmbH
Original Assignee
Vossloh Schwabe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vossloh Schwabe GmbH filed Critical Vossloh Schwabe GmbH
Priority to AT87117009T priority Critical patent/ATE84904T1/de
Publication of EP0279916A2 publication Critical patent/EP0279916A2/de
Publication of EP0279916A3 publication Critical patent/EP0279916A3/de
Application granted granted Critical
Publication of EP0279916B1 publication Critical patent/EP0279916B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Definitions

  • connection terminal device in particular for chokes or transformers, with at least one metallic clamping insert, which has two mutually spaced clamping legs, each carrying two facing knife contacts, through which two edge-open slot-like openings are limited, the respective width of which is smaller than the diameter of a connecting wire to be accommodated, and with a terminal housing Insulating material that has cutouts for connecting wires.
  • chokes or small transformers serving as ballasts for gas discharge lamps are provided by the manufacturer with a clamping device which enables the outer connecting wires to be connected to the winding ends. Since such chokes and small transformers are mass products that are manufactured in large numbers with increasing use of automatic work processes, the rational manufacturing and assembly options of the clamping device are of considerable importance. On the other hand, an electrically flawless, reliable connection between the outer connecting wires and the winding ends must be guaranteed in any case.
  • a choke is preferably known as a ballast for gas discharge lamps, in which the clamping device is designed in the manner of a luster terminal, which is fastened on a mounting rail carrying the laminated core.
  • the arrangement is such that the winding heads of the inductor are covered by one-piece insulating material housings which lie against the magnetic core and which are fastened to the laminated core by means of a molded tongue which is pushed into the space between the magnetic core and the respective winding end and which are attached to the core Wear molded tube pieces on the opposite outer wall, slotted at the bottom, on which cable end sleeves are attached by crushing, which firmly enclose the ends of the winding wires.
  • the luster terminal is pushed on one side onto these cable end sleeves and clamped with them via the assigned clamping screws.
  • the position of the luster terminal can be fixed to the housing by a nose.
  • the terminal device is relatively expensive and time-consuming because of the cable end sleeves to be crimped onto the pipe pieces mentioned and the luster terminal to be installed specifically. Also, the luster terminal arranged in front of the cap-like housing insulating the assigned winding head necessarily extends the overall length of the entire device, which is undesirable for a number of applications, for example when such a choke must be accommodated as a ballast for a gas discharge lamp in a lamp.
  • the terminal part is formed in a strip-like manner with two block-like clamping elements which are connected to one another by a thin web, the terminal elements having the terminals being arranged in the lateral areas adjacent to the outer wall of a housing-like molded insulating part covering the associated winding head with a web extending over the outer wall thereof.
  • the terminal part can be locked with the molded insulating part or a cover cap.
  • the terminals are designed as screw terminals with a solid metal terminal body with through connection bores and with clamping screws for the winding leads inserted into the connection bores, the assembly of this clamping device for mass production of the chokes is still complex. Namely, the connection wires of the windings, ie the winding ends, must first be threaded into the assigned connection bores of the screw terminals before the connection terminal part can be assembled and the clamping screws assigned to the winding ends can be tightened. In addition, the assembly of the terminal part is only possible after impregnation of the choke or the transformer, because otherwise the clamping screws used for the connection of the outer connecting wires stick together and can therefore no longer be operated.
  • an assembly of the electrical terminal device before the impregnation allows a choke known from DD-C-103 087, in which insulating caps are used for the insulation of the winding heads, which are anchored in the space between the winding head and the laminated core by means of a molded tongue.
  • the insulating cap is extended in the longitudinal direction of the device by an additional chamber in which electrical connection elements are accommodated, which are exposed after the impregnation and surface coating by removing covers formed on the cap.
  • the covers protect the metallic connecting elements, which are designed as screw terminals, against sticking through the impregnation material.
  • connection of the winding ends to the connection elements is not easy because the connection wires have to be threaded into the connection bores of the connection elements lying in the depth of their assigned chamber and clamped there, unless the connection elements were only connected to the winding ends after the connection Chamber pressed. However, this would be of little use considering the risk of damage to the thin winding wires.
  • the chamber of the cover cap which receives the connection elements and which is arranged upstream of the winding head increases the overall axial length of the entire device.
  • connection technology screwless terminals in various configurations are also used.
  • a connecting or connecting terminal for electrical conductors known from DE-A-31 12 969 are in an insulating body a busbar and at least one clamp spring slidably mounted in the manner of a plunger, which contacts the busbar and, in an advanced position with two U-shaped clamping legs, grips and contacts an electrical conductor in a fork-shaped manner, the electrical conductor in a conductor bed surrounding the conductor on all sides is guided, which is formed on both sides adjacent to the plunger spring.
  • Such a connecting or connecting terminal is not readily usable as a connecting terminal device for a choke or a small transformer because it is not suitable for being integrated with the device into a compact structural unit.
  • a connection of the relatively thin winding wires to the outer connecting wires, which have a much larger diameter, is often not readily possible.
  • An insulation displacement contact designed in the manner of a U-shaped sheet metal part is provided for connecting a winding end.
  • Slits extend from the bottom of the contact into the area of both legs. Relatively close to the floor, separate cutting edges are worked out on the flanks of the slots, which narrow the insulation displacement slot.
  • the U-shaped contact with the bottom is pressed into a chamber, optionally provided on a coil former, into which a winding end has previously been inserted.
  • the slots slide over the winding end, cutting through its insulation and producing a metallic connection between the contact and the winding end.
  • an inwardly standing tongue is provided on one of the legs of the U-shaped contact on the upper edge.
  • This insulation displacement connection with plug-in contact is open to the outside, so that impregnating agent can get into the chamber during any impregnation process, as a result of which the chamber would be added or at least the metallic surface of the contact would be coated with an insulating layer.
  • the insulation displacement connection is therefore not very suitable for devices that have to be impregnated in production.
  • the invention has for its object to provide a terminal device, in particular for chokes or small transformers, which allows a particularly short, compact design of the equipment equipped with such a terminal device with simple manufacture and time-saving installation.
  • the above-mentioned terminal device is characterized according to the invention in that the at least one clamping insert is designed as a screw terminal with a connecting hole arranged in a solid terminal body and used for receiving connecting wires and a clamping screw that can be screwed into a corresponding threaded hole leading into the connecting hole.
  • the two clamping legs are arranged on the bottom side of the solid clamp body, that the clamp insert with its clamp body towards the clamp screw is tight into the clamp housing on at least one, and that the clamp housing is placed on a lower part of insulating material covering at least the clamp insert.
  • connection wires of the winding are automatically stripped and properly contacted. Since the normal, common screw terminal connection is available for the outer connecting wires, the finished device can be installed in use in the conventional manner.
  • the connection points and connection means of the relatively thin winding wires and the generally much thicker outer connection wires on the metallic terminal body are separated from one another; they can therefore be designed with a view to achieving optimum connection conditions for the winding wires or the outer connection wires. Since the clamping insert with its clamping body is inserted tightly into the terminal housing towards the clamping screw, no liquid impregnating agent can penetrate from the interior of the terminal housing to the clamping screw and stick it together when impregnated.
  • the terminal housing which can be simply plugged onto a lower part and contains the clamping insert, allows an optimal adaptation to the respective spatial conditions of the choke or the transformer, so that the terminal device is particularly suitable for a compact, fully integrated connection technology to achieve designs of particularly short overall length.
  • the slot-like opening delimited by the knife contacts of the clamping insert can advantageously have a length exceeding the diameter of a plurality of connecting wires by appropriate dimensioning of the clamping legs and thus immediately take over the task of producing switching connections, while the solid clamping body also at least two intersecting connection bores can be formed in order to enable an optional connection of the outer connection wires from two different directions.
  • the arrangement can be such that the bottom region of the clamping body carrying the clamping limbs is essentially rigid and the other wall regions delimiting the connection bore (s) are designed to be elastically deformable, such that the tightened clamping screw with elongated deformation of the connection bore (s) and essentially undeformed floor area is pre-stressed by the elastically deformed wall areas.
  • this preload compensates for any shrinkage of the clamped connecting conductor; on the other hand, the rigid design of the base area prevents undesirable spreading of the clamping legs when the clamping screw is tightened.
  • the terminal housing has at least one chamber into which the terminal body is fitted in a vacuum-tight manner.
  • the terminal body is glued or cast with surrounding wall parts of the terminal housing or was injected or molded directly into the plastic terminal housing during manufacture.
  • the terminal housing has a molded-on cover receiving the clamping screw, which can be opened after inserting the clamping insert and then after impregnation.
  • recesses in the terminal housing which are intended for connecting wires, leading to the connecting bore or the connecting bores of the clamping insert can be closed when the clamping insert is inserted and only opened after the impregnation.
  • a particularly secure insertion of the connecting wires between the knife contacts and a stable, positionally stable mounting of the inserted connecting wires allows an advantageous embodiment in which the lower part has at least one support for the connecting wires which projects between the clamping legs when the terminal housing is fitted.
  • This edition is designed depending on the design of the clamping leg.
  • the clamping limbs are partially cylindrical and enclose a channel-like elongated recess, into which at least one slot-like opening opens and which is optionally cylindrical, the support can be formed on the lower part in the manner of a protruding into the channel-like recess Be formed pin.
  • the terminal housing and the lower part can also advantageously have latching means, by means of which they can be locked together, so that there is a particularly simple assembly option.
  • the terminal housing and / or the lower part can have cutouts through which the terminal insert can be brought into contact with a contact piece from the outside when the terminal housing is joined to the lower part.
  • the terminal housing and / or the lower part are part of the winding insulation or of a coil body of the choke or of the transformer.
  • a construction that is particularly favorable with regard to the overall length also results if the terminal housing or the lower part is designed as a cap-like housing for at least partially covering a winding head of the choke or the transformer, which has a fastening device and, if appropriate, a molded tongue that extends into a space can be inserted between the winding head and the laminated core of the choke or the transformer.
  • the cap-like housing forming the lower part can be closed off on the side facing the free end of the tongue by the attached terminal housing, so that there is no increase in the overall length of the entire device.
  • the terminal housing can have a receptacle for an electrical switching element, for example a fuse element or an overtemperature monitor, which can be closed by an attached lid and into which inlets for connecting wires open.
  • the new terminal device is especially designed for chokes or small transformers. In principle, however, it can also be used for other electrical devices in which similar requirements are placed on the connection technology as is possible to design such a connection terminal device as a separate clamping part, the terminal housing and the associated lower part then, for example, as an elongated cross section rectangular strip-like elements are designed, for example are stacked one on top of the other.
  • the choke shown in Fig. 1,2 which can also be designed as a transformer, is particularly intended for use as a ballast for gas discharge lamps. It has a relatively short block-like laminated core 1 in a U / T or E / I section, the U legs of which are held together by a clamp 2.
  • the winding heads which are not shown laterally above the laminated core 1, are each covered on both sides of the laminated core 1 by a cap-like housing 3 made of insulating material, which has an essentially U-shaped cross-sectional shape and has a molded-on edge flange 4 surrounding it on three sides with which it bears against the laminated core 1.
  • a tongue 5 In the plane of the edge flange 4, a tongue 5 (FIG.
  • the tongue 5 thus forms a fastening device for the housing 3 and at the same time the insulation of the winding head against the laminated core 1.
  • an electrical connection terminal device 6 is integrated, which allows an electrical connection to be made between the winding wires and the outer connection wires.
  • This terminal device 6 has an essentially rectangular, box-like terminal housing 7, which is formed from insulating material (plastic material) and from a flat front wall 8 there are two narrow side walls 9 and an upper cover wall 10.
  • the terminal housing 7, which is open towards the rear (FIGS.
  • a trough-like receiving space 13 for an electrical component for example a securing element, lying above the top wall 10 and delimited by the elongated front wall 8 and side wall parts 11 and a rear wall 12 , on whose feed lines can be inserted into the receiving space 13 through open-edge slot-like recesses 14, 15 (FIG. 3).
  • an electrical component for example a securing element
  • a cover 16 is used, which can be locked by means of molded-on locking fingers 17 with locking recesses 18 on the inside of the side wall parts 11.
  • the two cover caps 22, like the chambers 20, are located laterally next to the receiving space 13 near the side walls 9 of the terminal housing 7, the projecting cover wall 10 forming a type of console.
  • Each clamping insert 23 has a solid clamping body 24, which is essentially rectangular in cross section and adapted to the inner contour shape of the chamber 20, in which two intersecting connecting bores 25 are formed for external connecting lines, not shown in any more detail.
  • a threaded bore 26 into which a clamping screw 27 is screwed opens into the two connection bores 25 in the region of their crossing point.
  • two spaced-apart clamp legs 30 are formed, which consist of a hollow cylindrical pin connected to the clamp body 24 by two arranged in the jacket, opposite one another slot-like, open-edge openings 32 are formed, which open into a cylindrical, coaxial bore, which forms a channel-like recess 33.
  • the two clamping legs 30 thus have the shape of essentially cylindrical half-shells; At their edges delimiting the two slot-like openings 32 they carry knife contacts 34 which, in the manner shown in FIG. 9, are designed to run slightly wedge-like towards one another at least over part of the longitudinal extent of the slot-like openings 32.
  • each of the slot-like openings 32 is somewhat smaller than the diameter of a connecting wire indicated at 35, inserted between them.
  • the length of the clamping legs 30 can be chosen such that, in contrast to the illustration in FIG. 9, several, in particular two or three connecting wires 35 lying one above the other can be stripped and contacted simultaneously in the manner described.
  • the terminal body 24 is formed with its connection bores 25 and the wall parts surrounding them in such a way that the bottom region 36 carrying the two clamping legs 30, which lies approximately below the dashed line 37 (FIG. 9), acts in the manner of an essentially rigid plate.
  • the lateral wall areas 39 lying approximately to the side of the dashed lines 38 are dimensioned such that they are resiliently flexible when the clamping screw 27 is tightened, such that the connecting bore 25 assumes an oval cross-sectional shape which is exaggerated at 40 when the clamping screw 27 is tightened.
  • This design of the terminal body 24 ensures that the clamping screw 27 is under tension in the tightened state and thus automatically compensates for any shrinkage of the connecting wire lying in the connecting bore 25.
  • the essentially rigid design of the base region 36 prevents the two clamping legs 30 from being spread apart when the clamping screw 27 is tightened and thus loosening contact with the constrained connecting wire 35.
  • the clamping insert 23 described is pressed with its clamping body 24 in a vacuum-tight manner into the corresponding chamber 20 of the terminal housing 7, the clamping screw 27 projecting into the cavity of the cover hood 22, as can be seen in particular from FIG. 8.
  • a cross-sectionally rectangular, straight-edged partial housing 41 is formed above, the is delimited by a straight surface and has a front wall 42 and two side walls 43.
  • the dimensions of the sub-housing 41 are selected such that the terminal housing 7 onto the sub-housing 41 forming a lower part from above, i.e. from the free end of the tongue 5 adjacent side, can be pushed so that it closes the housing 3 on this side.
  • latching lugs 44 are integrally formed on the partial housing 41, which engage in corresponding latching recesses 45 (FIG. 3) of the terminal housing 7 when the terminal housing 7 is fitted and latch the two housings 41, 7 together.
  • a molded vertical, cylindrical pin 46 (Fig. 5, 9) is provided, the diameter of which corresponds to the diameter of the cylindrical recess 33 of a clamping insert 23 with play and which is surrounded by an annular channel-like recess 47, which holds the two partially cylindrical clamping legs 30 of the clamping insert 23 is used.
  • the pin 46 forms a receptacle for the connecting wire 35.
  • it is provided with a transverse groove 48, to which groove-like depressions 49 (FIG. 5) in the respective side wall 43 connect, which serve to receive a connecting wire 35 .
  • the cap-like housing 3 covering the winding head is first pushed with its tongue 5 onto the winding head.
  • the connecting wires 35 of the winding coming from the coil are then inserted into the groove-like depressions 49 and the groove 48 of the pin 46 forming a connecting wire support via recesses 49 in the housing 3 (FIG. 6).
  • the terminal housing 7 equipped with clamping inserts 23 in the manner described is pushed onto the partial housing 41 from above until the locking lugs 44 engage in the locking recesses 45 and thus lock the terminal housing 7.
  • the two clamping legs 30 reach over the connecting wire 35, which is guided laterally in the groove 48 and is supported downward, in the manner of a fork, wherein the knife contacts 34 cut the enamel insulation and penetrate so deep into the wire material that a reliable contact is ensured.
  • a recess 50 is provided on the partial housing 41 forming the lower part in the region of the two side walls 43, which in cooperation with an associated recess 51 in the region of the side walls 9 and the front wall of the terminal housing 7 in the assembled state, contact of the terminal body 24 of the respective clamping insert 23 with an electrical test probe is permitted.
  • connection terminal device 6 integrated into the winding insulation to form a compact unit as a whole. Since the clamping inserts 23 with their clamping bodies 24 are pressed into the chambers 20 in a vacuum-tight manner and the clamping screws 27 lie in the cover hoods 22, the clamping inserts 23 cannot be impaired by the impregnating agent during this impregnation process. After the impregnating agent has hardened, the covering hoods 22 are cut off at the top, so that the clamping screws 27, which remain electrically insulated over their length, are accessible from the outside. At the same time, aligned recesses in the form of bores 53 (FIG. 1) are made in the side walls 9 and the front wall 8 of the clamping housing 7 with the connecting bores 25 of the clamping inserts 23.
  • one or more electrical components for example bimetallic or fuse elements, can now be inserted into the receiving space 13 and are electrically connected to connecting wires inserted through the cutouts 14, 15 or cutouts 54 (FIG. 7).
  • a trough-like projection 55 (FIG. 3) formed on the inside of the cover 16 can at the same time be used to fix the electrical component in the receiving space 13 in a fixed position.
  • the invention was described in connection with the special winding head insulation by the housing 3 of a choke or a transformer.
  • the terminal device 6 in connection with other devices, for example in such a way that the partial housing 41 is molded onto a flange of a coil former of a small transformer, etc.
  • the sub-housing 41 would possibly be a flat bottom wall and a rear wall closed, wherein in the walls of the terminal housing 7 and the partial housing 41 corresponding recesses for the lead wire insertion are to be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Discharge Heating (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Dc-Dc Converters (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
EP87117009A 1987-02-24 1987-11-18 Anschlussklemmeinrichtung, insbesondere für Drosseln oder Transformatoren Expired - Lifetime EP0279916B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87117009T ATE84904T1 (de) 1987-02-24 1987-11-18 Anschlussklemmeinrichtung, insbesondere fuer drosseln oder transformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873705759 DE3705759A1 (de) 1987-02-24 1987-02-24 Anschlussklemmeinrichtung, insbesondere fuer drosseln oder transformatoren
DE3705759 1987-02-24

Publications (3)

Publication Number Publication Date
EP0279916A2 EP0279916A2 (de) 1988-08-31
EP0279916A3 EP0279916A3 (en) 1989-07-26
EP0279916B1 true EP0279916B1 (de) 1993-01-20

Family

ID=6321574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117009A Expired - Lifetime EP0279916B1 (de) 1987-02-24 1987-11-18 Anschlussklemmeinrichtung, insbesondere für Drosseln oder Transformatoren

Country Status (9)

Country Link
EP (1) EP0279916B1 (enrdf_load_stackoverflow)
AT (1) ATE84904T1 (enrdf_load_stackoverflow)
BG (1) BG48580A3 (enrdf_load_stackoverflow)
DD (1) DD267844A5 (enrdf_load_stackoverflow)
DE (2) DE3705759A1 (enrdf_load_stackoverflow)
ES (1) ES2037063T3 (enrdf_load_stackoverflow)
FI (1) FI93405C (enrdf_load_stackoverflow)
GR (1) GR3006882T3 (enrdf_load_stackoverflow)
YU (1) YU47411B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2536252B2 (ja) * 1990-07-30 1996-09-18 日本精機株式会社 可動磁石式計器
DE4105076C2 (de) * 1991-02-19 1993-10-21 Phoenix Elekt Elektrische Anschlußklemme
DE9110706U1 (de) * 1991-08-29 1993-01-07 Siemens AG, 8000 München Spule für den elektromagnetischen Antrieb eines Schaltgerätes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2344045C2 (de) * 1973-08-31 1983-07-07 Metalluk Bauscher GmbH & Co KG, 8600 Bamberg Lüsterklemme
US3988707A (en) * 1974-11-14 1976-10-26 Amp Incorporated Swing out load coil assembly
FR2330159A1 (fr) * 1975-10-27 1977-05-27 Carpano & Pons Organe de serrage pour le raccordement de conducteurs electriques
DE2915100A1 (de) * 1979-04-12 1980-10-16 Siemens Ag Isolierte schraubklemme
US4381132A (en) * 1980-09-10 1983-04-26 Itt Flat cable connector

Also Published As

Publication number Publication date
DE3705759A1 (de) 1988-09-01
FI880558A7 (fi) 1988-08-25
FI93405C (fi) 1995-03-27
ES2037063T3 (es) 1993-06-16
ATE84904T1 (de) 1993-02-15
GR3006882T3 (enrdf_load_stackoverflow) 1993-06-30
YU47411B (sh) 1995-03-27
EP0279916A2 (de) 1988-08-31
FI93405B (fi) 1994-12-15
BG48580A3 (bg) 1991-03-15
FI880558A0 (fi) 1988-02-08
DD267844A5 (de) 1989-05-10
EP0279916A3 (en) 1989-07-26
YU33988A (en) 1990-12-31
DE3783759D1 (de) 1993-03-04

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