WO2002029842A1 - Unite d"arbre de commande pour commutateur electrique, notamment pour commutateur basse tension - Google Patents

Unite d"arbre de commande pour commutateur electrique, notamment pour commutateur basse tension Download PDF

Info

Publication number
WO2002029842A1
WO2002029842A1 PCT/EP2001/011472 EP0111472W WO0229842A1 WO 2002029842 A1 WO2002029842 A1 WO 2002029842A1 EP 0111472 W EP0111472 W EP 0111472W WO 0229842 A1 WO0229842 A1 WO 0229842A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft body
contact lever
lever
unit according
shaft unit
Prior art date
Application number
PCT/EP2001/011472
Other languages
German (de)
English (en)
Inventor
Francesco De Vizzi
Gerd Jodehl
Rolf-Dieter Bauer
Original Assignee
Aeg Niederspannungstechnik Gmbh & Co. Kg.
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 Aeg Niederspannungstechnik Gmbh & Co. Kg. filed Critical Aeg Niederspannungstechnik Gmbh & Co. Kg.
Priority to DE50112238T priority Critical patent/DE50112238D1/de
Priority to EP01986371A priority patent/EP1325508B1/fr
Priority to AU2002220586A priority patent/AU2002220586A1/en
Priority to PL354586A priority patent/PL198407B1/pl
Publication of WO2002029842A1 publication Critical patent/WO2002029842A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor

Definitions

  • the invention relates to a switching shaft unit for electrical switches according to the preamble of claim 1.
  • the invention relates in particular to a switching shaft unit to be installed in a low-voltage switch.
  • a generic switching shaft unit for electrical switches which has a rotatably supported insulating switching shaft body and an electrically conductive contact lever supported thereon.
  • the shift shaft body is rotatable relative to the contact lever about a bearing axis against a spring force of springs.
  • the springs are each suspended at one end on a common pin, which is parallel to the bearing axis of the
  • Contact lever extends and is slidably guided in a guide groove of the shift shaft body, which extends to the bearing axis of the contact lever.
  • the springs are each suspended at the other end from a further common pin which rests on a rolling surface of the contact lever. In this way, a spring force is applied to the contact lever, which is thus biased in its closing direction. When the switch is closed, the pin moves within and is guided by the guide groove.
  • the object of the invention is to provide an improved shift shaft unit which enables easier and less frictional shifting operation.
  • a selector shaft unit for electrical switches with an isolating selector shaft body and a contact lever which is rotatably supported on the selector shaft body about a central bearing axis against a spring force of at least one spring which is suspended on pins which are connected to the via a coupling device
  • Contact levers are coupled and extend through grooves formed on the peripheral surface of the shift shaft body, the
  • Switch shaft unit has at least one pivot lever, which is rotatably supported at one of its ends on one of the pins and is rotatably supported at its other end on the shift shaft body about an eccentric pivot axis such that the pin on a rotation of the shift shaft body relative to the contact lever by the pivot lever Circular arc is preferably guided inside the groove.
  • the groove is so wide that the pin generally does not touch the groove inner walls of the groove.
  • two identical pivot levers are provided for the pin, each rotatably supporting a portion of the pin and have the pivot axis in common.
  • the two pivot levers face each other and form a pair of pivot levers with the common pivot axis.
  • the pin is guided stably on the two sections.
  • a radial distance between the pivot axis and the bearing axis is greater than a radial distance between a groove bottom of the groove and the bearing axis.
  • Switch shaft body moves. Furthermore, the groove can thereby extend essentially in the radial direction, which advantageously allows the groove on the selector shaft body to be designed in a simple manner.
  • the switching shaft body is made from a thermoset, and particularly preferably from a glass fiber reinforced polyester. This material advantageously shows little wear with regard to the rotatable support of the pivot lever.
  • the length of the groove is
  • the pins are connected to the contact lever via a pair of levers that are rotatably supported on the contact lever as the coupling device. In this way, the coupling of the pin to the contact lever is advantageously implemented with little friction.
  • the selector shaft body has an opening on the pivot axis in which a pin is fitted which is in turn fitted into an opening at the other end of the pivot lever.
  • the selector shaft body has a one-piece projection on the pivot axis, which is fitted into an opening at the other end of the pivot lever.
  • the pivot lever at its other end has a one-piece projection which is fitted in an opening on the pivot axis on the shift shaft body.
  • the pins are connected to the contact lever via rollers mounted thereon as the coupling device, which roll on rolling surfaces of the contact lever when the switching shaft body rotates relative to the contact lever.
  • the coupling of the pin to the contact lever is advantageously realized with fewer components.
  • the pins rest directly on rolling surfaces of the contact lever and roll or slide thereon when the contact lever rotates relative to the selector shaft body.
  • the coupling device is realized by the pins themselves, whereby advantageously fewer components are required.
  • the bearing axis of the contact lever is floatingly supported in an elongated hole in the selector shaft body, which extends in a direction perpendicular to contact surfaces of the contact lever.
  • the bearing axis of the contact lever is rigidly attached to the shift shaft body, while the contact lever has an elongated hole which extends in a perpendicular direction to the contact surfaces of the contact lever and into which the bearing axis is fitted so as to float the contact lever.
  • the path of the pin is limited in a direction directed radially outward with respect to the selector shaft body. In this way, an asymmetrical open position of the contact lever can be counteracted, in particular if it was opened as a result of a short-circuit current.
  • a projection is arranged on the groove inner walls of the groove in the vicinity of the peripheral surface of the selector shaft body.
  • the groove on its side on the circumferential surface of the selector shaft body is completely or partially closed.
  • a stop is formed on the selector shaft body, which limits the path of the pivoting lever so as to limit the path of the pin.
  • FIG. 1 shows a cross-sectional view of a switching shaft unit according to an in-house prior art
  • FIG. 2 shows a cross-sectional view of a switching shaft unit according to an exemplary embodiment of the present invention.
  • FIG. 1 An example shown in FIG. 1, a switching shaft unit in accordance with the in-house state of the art is built of a low voltage switch in a 'case of an arc extinguishing device which are not shown in FIG. 1.
  • the arc extinguishing device of the low-voltage switch also has arc chambers (not shown) and two current-carrying conductors 6 and other parts.
  • the housing of the arc quenching device is mounted in a housing (not shown) of the low-voltage switch.
  • the selector shaft unit essentially consists of a cylindrical selector shaft body 11 made of a non-conductive material or a non-conductive one
  • a S-shaped electrically conductive contact lever 4 is rotatably supported by a bearing shaft 7 attached to the contact lever 4, which is rotatably fitted in a through opening 1c of the selector shaft body 11.
  • the entire selector shaft unit is rotatably mounted in a receiving section (not shown) of the housing, the axis of rotation being aligned coaxially with the through opening 1c and thus also coaxially with the bearing axis 7 fitted therein.
  • the selector shaft unit serves to establish or interrupt an electrical connection between the two current-carrying conductors 6 by rotating the entire selector shaft unit together with the contact lever 4 within the housing about the axis of rotation (coaxial to the bearing axis 7).
  • contact surfaces 4a of the contact lever 4 come into or out of contact with corresponding contact surfaces 6a of the current-carrying conductors 6.
  • the through opening 1c in the selector shaft body 11 preferably an elongated hole which extends perpendicular to the contact surfaces 6a of the current-carrying conductors 6 so as to float the contact lever 4 in the selector shaft body 11.
  • This floating mounting of the contact lever 4 on the selector shaft body 11 can also be achieved by a modified structure in which the bearing shaft 7 is rigidly attached to the selector shaft body 11, while the contact lever 4 has the elongated hole 1c.
  • the same effect of the floating mounting of the contact lever 4 on the selector shaft body 11 is achieved as in the construction described above.
  • the switching shaft unit can be actuated by means of an actuating element (not shown) in order to achieve the switched-on state shown in FIG. 1 or a switched-off state (not shown) of the low-voltage switch.
  • the selector shaft body 11 is rotationally symmetrical and approximately cylindrical.
  • the through opening 1c and thus also the bearing axis 7, via which the contact lever 4 is rotatably mounted, are coaxially aligned with the axis of the cylindrical switching shaft body 11.
  • the contact lever 4 is housed in a recess la.
  • the recess la penetrates the selector shaft body 11 diametrically at its axially central section, so that the recess la forms a space within the selector shaft body 11.
  • On the circumferential surface of the selector shaft body 11 are two diametrically opposite in the axial direction of the selector shaft body 11
  • Guide grooves 8 are formed, which are provided for guiding pins 2. The function of these pins 2 will be described in more detail later.
  • Two through holes 9, which are diametrically opposed, and through which at least one receives a rod-shaped pin 10 extend through the switching shaft body parallel to the through opening 1c.
  • the actuating element for actuating the selector shaft unit is connected to the rod-shaped pin 10.
  • two levers 3 are arranged on a front side surface of the contact lever 4.
  • Each lever 3 is rotatably supported at one of its ends on the side surface of the contact lever 4 about an axis of rotation parallel to the bearing axis 7.
  • the two axes of rotation of the respective levers 3 are arranged symmetrically with respect to one another with respect to the bearing axis 7.
  • two further levers 3 are preferably arranged on the rear side surface of the contact lever 4 in a similar manner, which are the same as the lever 3 and which are directly opposite them.
  • each lever 3 on the front side surface of the contact lever 4 with the corresponding opposite lever 3 on the rear side surface of the contact lever 4 forms a pair of levers which is rotatably supported on the contact lever 4 about a common axis of rotation.
  • each pair of levers has a support section at the other ends of the levers 3 12, on each of which a pin 2 extending parallel to the bearing axis 7 is supported.
  • the levers 3 thus serve as a coupling device for coupling the pins 2 to the contact lever 4.
  • springs 13 are suspended on the pins on both sides.
  • the springs 13 exert a tensile force on the two pins 2, so that the pins 2 are pressed into the respective support sections 12 of the pairs of levers.
  • the tensile force of the springs 13 is accordingly transmitted to the contact lever 4 via the pins 2 and the pair of levers of the levers 3 in the construction of the shift shaft unit described above.
  • the contact lever 4 is thus lb within the recess la by the tensile force exerted on the pins 2 against corresponding projections
  • Switch shaft body 11 biased in the closing direction at a certain position.
  • the pins 2 extend through the above-mentioned guide grooves 8 of the selector shaft body 11 and are guided through them. It is thus possible for the pins 2 to move within the guide grooves 8 of the selector shaft body 11 when the selector shaft body 11 rotates relative to the contact lever 4.
  • the length of the guide grooves 8 is preferably dimensioned with respect to the freedom of movement of the S-shaped contact lever 4 within the recess la of the switching shaft body 11 such that the pins 2 are under no circumstances contracted up to the stop on the guide groove bottoms 8a of the guide grooves 8, regardless of the operating state of the low-voltage switch can. In this way it is ensured that the contact lever 4 is always biased by the springs 13.
  • Insulating caps are positively attached on both sides of the cylindrical switching shaft body 11.
  • the caps cover the springs 13 and the pins 2.
  • Each cap has a (not Shown) provided bearing pin, which is used for the axial mounting of the entire switching shaft unit in the not shown receiving portion of the housing of the arc extinguishing device.
  • the axis of the bearing journal is aligned coaxially with the through opening lc of the selector shaft body 1 and thus also coaxially with the bearing axis 7 fitted therein.
  • the selector shaft unit is arranged in the housing in such a way that the bearing journals, which extend axially on both sides of the selector shaft unit, can be accommodated in corresponding contours with slide bearing sections of the receiving section.
  • the actuating element connected to the rod-shaped pin 10 is actuated in order to rotate the selector shaft body 11 in the counterclockwise direction according to FIG. 1 about the axis of the bearing pins (aligned coaxially with the bearing axis 7 of the contact lever 4).
  • the S-shaped contact lever 4 supported on the selector shaft body 11 also rotates about the axis of the bearing journal, so that the contact surfaces 4a of the contact lever 4 come into contact with the corresponding contact surfaces 6a of the current-carrying conductors 6, as can be seen in FIG. 1 , This touch contact does not allow a further rotation of the contact lever 4. If the actuator continues the shift shaft body 11 around the
  • the switching shaft body 11 thus rotates relative to the contact lever 4 about the axis of the trunnion in the counterclockwise direction, as shown in FIG. 1.
  • the selector shaft body 1 rotates relative to the contact lever 4 about its bearing axis 7, since this is coaxially aligned with the axis of the bearing pins.
  • the pin 2 moves upwards according to FIG. 1 and is guided through the guide groove 8 of the selector shaft body 11. Furthermore, the contact surfaces 4a of the
  • the selector shaft body 1 of the selector shaft unit according to the present invention also has, compared to the example of the prior art, at least one pivot lever 5, which at one end thereof is connected to the corresponding pin 2 is connected so that the pivot lever 5 is rotatable about the longitudinal axis of the pin 2 relative to the corresponding lever 3.
  • the pivot lever 5 is supported at its other end on the shift shaft body 1 so as to be rotatable about an eccentric pivot axis P.
  • the pivot axis P of the pivot lever 5 extends generally parallel to the bearing axis 7 and penetrates circumferentially at a distance from the groove 14 the switching shaft body 1, so that the pin 2 is guided by the pivot lever 5 on a circular arc inside the groove 14.
  • Two identical pivot levers 5 are preferably provided for each pin 2, each of which rotatably support a section of the pin 2 and have the pivot axis P in common.
  • the two pivot levers 5 lie opposite one another and, like the levers 3, form a pair of pivot levers with the common pivot axis P.
  • the grooves 14 according to FIG. 2 of the selector shaft body 1 replace the guide grooves 8 according to FIG. 1 and are arranged diametrically opposite at the same position on the peripheral surface of the selector shaft body 1.
  • the grooves 14 of the selector shaft body 1 are preferably so wide that during the aforementioned rotation of the selector shaft body 1 relative to the contact lever 4, the pin 2 can move within the groove 14, but without touching the inner surfaces of the groove 14.
  • friction between the pin 2 and the groove 14 is avoided, which enables an easier and less frictional switching operation.
  • protrusions may be provided on the inner surfaces of the groove 14 near the peripheral surface of the shift shaft body 1. These projections limit a path of the pin 2 in a radially outward direction with respect to the selector shaft body 1
  • the same effect can also be achieved in that the groove 14 on the side of the circumferential surface of the selector shaft body 1 is designed to be completely or partially closed, or in that a corresponding stop is formed on the selector shaft body 1 against which the pivot lever 5 can strike.
  • the pin 2 can and should of course touch the corresponding projections or groove inner walls of the groove 14.
  • the radial distance between the pivot axis P and the bearing axis 7 is preferably greater than the radial distance between a groove bottom 14a of the groove 14 and the bearing axis 7.
  • the pin 2 moves essentially radially Direction of the switching shaft body 1, so that the groove 14 extends in a favorable manner in the radial direction.
  • Switch shaft body 1 is preferably achieved according to this embodiment by a pin 15 which in an opening in the switch shaft body 1 on the pivot axis P is fitted.
  • the pivot lever 5 has at its other end an opening in which the pin 15 is fitted in such a way that the pivot lever 5 is supported on the selector shaft body 1 so that it can rotate about its pivot axis P.
  • the invention is not limited to the exemplary embodiment described above.
  • the shift shaft body has at the
  • Pivot axis P has a one-piece projection which engages with an opening at the other end of the pivot lever 5. In this way, the rotatable support of the pivot lever 5 on the shift shaft body is realized without the pin 15, which advantageously saves manufacturing costs.
  • the pivot lever has at its other end a one-piece projection which is fitted into an opening on the pivot axis P on the selector shaft body 1.
  • the rotatable support of the pivot lever on the selector shaft body 1 is realized without the pin 15, which advantageously saves manufacturing costs.
  • the coupling device is implemented by rollers which are attached to the pins 2 and are pressed by the spring force of the springs 13 against corresponding rolling surfaces of the contact lever, so that the rollers at one
  • the pins 2 roll directly on rolling surfaces of the contact lever when the switching shaft body rotates relative to the contact lever. So with this Modification the coupling device realized by the pins themselves.
  • the number of swivel levers is not limited. At least one of the pins 2 must be guided through at least one pivot lever 5.
  • the present invention is applicable not only to low-voltage switches but to any switch for switching an electrical current.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

Abstract

L"invention concerne une unité d"arbre de commande pour commutateur électrique avec un corps d"arbre de commande isolant (1) et un levier de contact (4) qui est soutenu sur le corps d"arbre de commande (1) de manière à tourner autour d"un axe de palier central (7) à l"encontre de la force d"au moins un ressort (13), qui est suspendu à des goupilles (2) qui sont accouplées au levier de contact (4) par l"intermédiaire d"un dispositif d"accouplement (3), s"étendent à travers des rainures (14) et sont formées sur la surface périphérique du corps d"arbre de commande (1). Cette unité d"arbre de commande se caractérise en ce qu"elle comporte au moins un levier pivotant (5) soutenu rotatif à une des ses extrémités sur une des goupilles (2) et soutenu à l"autre extrémité sur le corps d"arbre de commande (1) de manière à tourner autour d"un axe de pivotement (P) excentrique, de sorte que la goupille (2) soit guidée par le levier pivotant (5) sur un arc de cercle à l"intérieur de la rainure (14) lors d"une rotation du corps d"arbre de commande (1) par rapport au levier de contact (4).
PCT/EP2001/011472 2000-10-05 2001-10-04 Unite d"arbre de commande pour commutateur electrique, notamment pour commutateur basse tension WO2002029842A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50112238T DE50112238D1 (de) 2000-10-05 2001-10-04 Schaltwelleneinheit für elektrische schalter, insbesondere für niederspannungsschalter
EP01986371A EP1325508B1 (fr) 2000-10-05 2001-10-04 Unite d'arbre de commande pour commutateur electrique, notamment pour commutateur basse tension
AU2002220586A AU2002220586A1 (en) 2000-10-05 2001-10-04 Selector shaft unit for an electrical switch, especially for a low voltage switch
PL354586A PL198407B1 (pl) 2000-10-05 2001-10-04 Zespół dźwigni napędu wyłącznika, do wyłączników elektrycznych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10049407.2 2000-10-05
DE2000149407 DE10049407C2 (de) 2000-10-05 2000-10-05 Schaltwelleneinheit für elektrische Schalter, insbesondere für Niederspannungsschalter

Publications (1)

Publication Number Publication Date
WO2002029842A1 true WO2002029842A1 (fr) 2002-04-11

Family

ID=7658814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/011472 WO2002029842A1 (fr) 2000-10-05 2001-10-04 Unite d"arbre de commande pour commutateur electrique, notamment pour commutateur basse tension

Country Status (6)

Country Link
EP (1) EP1325508B1 (fr)
CN (1) CN1218348C (fr)
AU (1) AU2002220586A1 (fr)
DE (2) DE10049407C2 (fr)
PL (1) PL198407B1 (fr)
WO (1) WO2002029842A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102386029A (zh) * 2010-08-31 2012-03-21 上海良信电器股份有限公司 塑壳式断路器的双断点动触头转轴系统
WO2014049011A1 (fr) * 2012-09-27 2014-04-03 Eaton Electrical Ip Gmbh & Co. Kg Disjoncteur à courant continu pourvu d'un dispositif d'extinction d'arc indépendant du sens du courant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001471A1 (de) * 2007-01-05 2008-07-10 Siemens Ag Elektrische Schalteinrichtung
CN102376504A (zh) * 2011-11-15 2012-03-14 江苏大全凯帆电器股份有限公司 连杆式转轴卡住机构
CN102403171A (zh) * 2011-11-21 2012-04-04 科都电气有限公司 用于塑壳断路器的触头结构及使用该结构的塑壳断路器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560696A1 (fr) * 1992-03-13 1993-09-15 Schneider Electric Sa Contact d'un disjoncteur à boîtier moulé
DE19836754A1 (de) * 1998-08-13 2000-02-17 Aeg Niederspannungstech Gmbh Schaltwelleneinheit für Schalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0560696A1 (fr) * 1992-03-13 1993-09-15 Schneider Electric Sa Contact d'un disjoncteur à boîtier moulé
DE19836754A1 (de) * 1998-08-13 2000-02-17 Aeg Niederspannungstech Gmbh Schaltwelleneinheit für Schalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102386029A (zh) * 2010-08-31 2012-03-21 上海良信电器股份有限公司 塑壳式断路器的双断点动触头转轴系统
WO2014049011A1 (fr) * 2012-09-27 2014-04-03 Eaton Electrical Ip Gmbh & Co. Kg Disjoncteur à courant continu pourvu d'un dispositif d'extinction d'arc indépendant du sens du courant
US9552945B2 (en) 2012-09-27 2017-01-24 Eaton Electrical Ip Gmbh & Co. Kg Direct current switch with a device for arc extinction independent of current direction

Also Published As

Publication number Publication date
EP1325508B1 (fr) 2007-03-21
AU2002220586A1 (en) 2002-04-15
EP1325508A1 (fr) 2003-07-09
DE10049407C2 (de) 2002-10-10
DE10049407A1 (de) 2002-05-02
PL354586A1 (en) 2004-01-26
CN1218348C (zh) 2005-09-07
CN1397081A (zh) 2003-02-12
DE50112238D1 (de) 2007-05-03
PL198407B1 (pl) 2008-06-30

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