WO2002027743A1 - Drivetrain for a moving contact of an electrical switch - Google Patents

Drivetrain for a moving contact of an electrical switch Download PDF

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Publication number
WO2002027743A1
WO2002027743A1 PCT/DE2001/002805 DE0102805W WO0227743A1 WO 2002027743 A1 WO2002027743 A1 WO 2002027743A1 DE 0102805 W DE0102805 W DE 0102805W WO 0227743 A1 WO0227743 A1 WO 0227743A1
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WO
WIPO (PCT)
Prior art keywords
contact carrier
contact
drive lever
lever
coupling assembly
Prior art date
Application number
PCT/DE2001/002805
Other languages
German (de)
French (fr)
Inventor
Michael Bach
Michael Sebekow
Guenter Seidler-Stahl
Detlev Schmidt
Ingo Thiede
Sezai Tuerkmen
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2002027743A1 publication Critical patent/WO2002027743A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts

Definitions

  • the invention is in the field of electrical switches and can be used in the structural design of a drive train for a movable contact of an electrical switch, which is provided with a pivotable drive lever, a pivotably mounted contact carrier that receives the contact and a coupling assembly for supporting the contact carrier on the drive lever and which has a catching device for the contact carrier, by means of which the contact carrier can be secured against bouncing - with the current-limiting opening of the movable contact due to electrodynamic forces acting on it.
  • the invention relates to drive trains in which the contact carrier can be converted from an off position to an on position on the one hand by swiveling the drive lever - from an exhibition into an adjustment - and on the other hand for swiveling from its on position to the off position with the drive lever remaining in the setting, can be released by the coupling assembly.
  • a drive train is assigned to the movable contacts of the two outer poles, each of these two drive trains having a catch element pivotably arranged on the contact carrier, under the action of a first spring, and a counterpart assigned to the catch element, and wherein in The drive lever is in the on position and the contact carrier is in the OFF position and the counterpart is engaged by the catch element (US Pat. No. 5,912,605).
  • the coupling assembly of the two outer drive trains in each case comprises a bolt which, when the contact carrier is in the ON position, bears against a curved surface of the contact carrier in a latching position.
  • the bolt can slide out of its locking position on the contact carrier depending on the force.
  • the bolt is firmly connected to a lever, which in turn is arranged on a crossbar.
  • the contact carrier of the middle pole is also fixedly arranged on this traverse. This middle contact carrier is articulated on the drive lever.
  • the middle contact carrier is therefore part of the coupling modules of the two outer drive trains.
  • a further spring designed as a leaf spring is required, which is arranged on the lever firmly connected to the cross member and which has a long, curved free end leg, by means of which the Catching element when pivoting the outer contact carrier against the force of the first spring for gripping a bolt arranged fixed in the switch is pivotable.
  • the spring forces of both springs must be precisely matched and the leaf spring must be precisely arranged in the trajectory of the catching element.
  • the middle contact carrier can only be swung into its OFF position together with the two outer contact carriers and only with the simultaneous resetting of the drive lever. In particular, it cannot be secured against bouncing in the same way as the two outer contact carriers. If the middle contact carrier and an outer contact carrier swivel around at the same time, there is also the risk that the additional spring does not engage or does not engage sufficiently in the movement path of the catching element and the outer contact carrier is no longer secured against bouncing.
  • Drive trains assigned to Tru are designed in such a way that all contact carriers are pivotable independently of one another can be released depending on the force and can be secured against rebounding (DE 199 10 172 AI).
  • the drive trains each have a coupling assembly, a link lever pivotally mounted on the contact carrier and a coupling lever articulated on the drive lever, a pin of the coupling lever engaging in the link of the link lever.
  • the link lever also forms an abutment for contact force springs, by means of which the movable contact with the required contact force can be supported on an assigned stationary contact.
  • the link lever can be pivoted under the action of electrodynamic forces which cause the movable contact to be lifted from the stationary contact assigned to it, via the contact force springs supported on it.
  • the invention has for its object to simplify the interaction of the coupling assembly and safety gear.
  • this object is achieved in that the counterpart can be pivoted with the drive lever and in that the catching element can be slid over the counterpart like a snap lock when the contact carrier is pivoted.
  • the elements of the catching device are no longer a structural component of the Coupling assembly, so that the catching device can be used for coupling assemblies of different designs.
  • the catching device can also replace the known catching devices (US Pat. No. 5,912,605 and DE 199 10 172 AI).
  • a further development of the invention provides that the catch element has a rest position in which it is supported under the force of the spring by means of a stop on a stop surface of the contact carrier. Because of this stop, the drive lever can be pivoted into its OFF position independently of the catch element, so that when the drive lever is pivoted in this way, the contact carrier is inevitably released by the catch device.
  • the counterpart can expediently be formed by a bolt connecting the drive lever to the coupling assembly.
  • a safety gear designed according to the invention can also be integrated into drive trains in which no safety gear has previously been provided, without significant design changes.
  • the safety gear can advantageously be integrated into drive trains in which the coupling assembly has a known span that can be shortened depending on the force.
  • the coupling assembly is designed in such a way that the shortening of the span can be blocked, such drive trains can be used in both current-limiting and in "dynamically fixed" switches.
  • a coupling module with a span that can be shortened depending on the force can be used as an articulated lever (as it is known for example from DE 197 40 422 AI) or as a telescopic latching device (as is known for example from EP 0 398 461 A2).
  • An embodiment of the new drive train in four different phases of its motion sequence is shown in Figures 1 to 4. Show
  • FIG. 1 shows the drive train with the drive lever in an ON position and a contact carrier in an ON position
  • FIG. 2 shows the drive train when the contact carrier is pivoted into an OFF position, with the drive lever remaining in the ON position
  • FIG. 3 shows the drive train with a contact carrier secured in its OFF position by means of a catching device against bouncing and
  • FIG. 4 shows the drive train with a contact carrier released by the catching device when the drive lever is in an OFF position and the contact carrier is in the OFF position.
  • the drive train for a contact 2 of an electrical switch designed as a contact lever and movable about a first pivot bearing 1 has a drive lever 4 arranged on a switching shaft 3, a contact carrier 6 carrying the movable contact 2 and rotatable about a second pivot bearing 5 and a coupling assembly 7 which connects the contact carrier 6 to the drive lever 4 and is designed as an articulated lever.
  • the movable contact 2 is supported by means of contact force springs 8 supported on the contact carrier 6, depending on the switching state, either via a first contact piece 9 on a second contact piece 10 of a fixed contact 11 or via a partial region 12 of its peripheral edge on a first stop surface 13 of the contact carrier.
  • a catch device 14 is integrated in the drive train, which has a catch element 15 which is pivotably arranged on the contact carrier 6 and is designed as a catch hook, and a counterpart 16 which is arranged on the drive lever 4 and is assigned to the catch element 15.
  • a first bolt which connects the drive lever 4 to the articulated lever 7, serves as counterpart 16.
  • a second bolt which connects the articulated lever 7 to the contact carrier 6, serves as the pivot bearing 17 of the catch hook 15.
  • another counterpart can also be used, which if necessary is also formed on the selector shaft and can be pivoted with the drive lever. In the same way, a separate pivot bearing for the catch element can be formed on the contact carrier.
  • FIG. 1 which shows the drive train in the on state during normal operation of the switch
  • the catch element 15 is in its rest position.
  • Normal operation is understood to mean a range of currents up to the overload range in which the electrodynamic forces acting between the contacts are below a predetermined limit value and the contacts remain in the closed state due to the forces of the contact clock force springs counteracting these forces Maintaining this rest position, the catching element 15 has a stop 18, by means of which it acts on a second stop surface 20 of the spring 19 under the force of a spring 19 acting thereon
  • the contact carrier supports.
  • the contact carrier has a pocket-like recess 21 as an abutment for receiving the spring 19 designed as a helical compression spring.
  • the spring 19 and the abutment 21 of the spring can also have any other shape that serves the present purpose.
  • the articulated lever 7 acts as a rigid support member connecting the contact carrier 6 with the drive lever 4.
  • FIG. 2 which shows the drive train in a state in which the contact carrier swivels into an OFF position with the drive lever remaining in the ON position due to high currents - in which the electrodynamic forces acting between the contacts are no longer below the predetermined limit value
  • the span of the articulated lever shortens depending on the force in a manner known for example from DE 197 40 422 AI.
  • the Fangha Ken 15 has at its free end 22 a sliding surface 23 which meets the first bolt 16 when the contact carrier 6 is pivoted into its exhibition.
  • the sliding surface 23 is arranged such that the catch hook 15 is raised against the spring force, slides over the first bolt when the contact carrier rotates further, and finally engages behind the first bolt in a snap-lock manner and thereby returns to its rest position.
  • the contact carrier 6 is thereby fixed in its OFF position, so that a rebound of the contact carrier into its ON position is reliably prevented.
  • the catch hook 15 only engages behind the first bolt 16 to such an extent that it does not extend into its path of movement.
  • the drive lever 4 which is fixedly arranged on the selector shaft 3 maintains its ON position.
  • the drive lever reaches its OFF position, as shown in FIG. 4, only when, for example, the high current which has caused the electrodynamic opening of contacts 2 and 11 has also been detected and processed by an overcurrent release provided in the switch in a known manner is to release a latch of the selector shaft 3. This then executes a rotation in the direction of an arrow 24 shown in FIG. 3.
  • the first bolt 16 is pivoted out of its position under which the catch hook 15 engages. In this way, on the one hand, the contact carrier 6 becomes through the catch hook
  • the coupling assembly can also be used as a telescopic latching device (Similar to EP 0 398 461 A2).
  • the pin provided for connecting the sliding piece of the latching device to the crank arm of the selector shaft is expediently extended axially in order to form the counterpart provided in the sense of the invention.

Abstract

The invention relates to a drivetrain for a moving contact (2), associated with a second contact (11) and provided with a pivoting drive lever (4), a pivotably mounted contact support (6), for the moving contact (2), and a coupling sub-assembly (7), connecting the contact support (6) to the drive lever (4). Contacts (11) and (2) can be rapidly opened under high current conditions as a result of the high electrodynamic forces generated, whereby the contact support (6) may be released from the coupling sub-assembly (7), depending on the force present, in order to rotate. The rotated contact support (6) may be secured against stops by means of a catch device (14), comprising a catch element (15) and a counter piece (16), whereby the catch element (15), loaded by a spring (19) and rotatably mounted on the contact support (6), engages behind the counter piece (16). According to the invention, the interaction of the coupling sub-assembly (7) and the catch device (14) may be simplified, whereby the counter-piece (16) may rotate with the drive lever (4) and the catch element (15) may slide over the counter piece (16) in a snap locking manner on rotating the contact support (6). The counter piece may be advantageously formed from a pin connecting the drive lever to the coupling sub-assembly.

Description

Beschreibungdescription
7Antriebsstrang für einen bewegbaren Kontakt eines elektrischen Schalters7 Drive train for a movable contact of an electrical switch
Die Erfindung liegt auf dem Gebiet der elektrischen Schalter und ist bei der konstruktiven Gestaltung eines Antriebsstranges für einen bewegbaren Kontakt eines elektrischen Schalters anzuwenden, der mit einem schwenkbaren Antriebshebel, einen den Kontakt aufnehmenden schwenkbar gelagerten Kontaktträger und einer Koppelbaugruppe zum Abstützen des Kontaktträgers an dem Antriebshebel versehen ist und der eine Fangeinrichtung für den Kontaktträger aufweist, mittels derer der Kontaktträger - bei strombegrenzender Öffnung des bewegbaren Kontak- tes aufgrund auf ihn einwirkender elektrodynamischer Kräfte - gegen Prellen sicherbar ist. Die Erfindung bezieht sich hierbei auf Antriebsstränge, bei denen der Kontaktträger einerseits durch Schwenken des Antriebshebels - von einer Ausstellung in eine Einstellung - aus einer Aus-Position in eine Ein-Position überführbar und andererseits zum Umschwenken aus seiner Ein-Position in die Aus-Position bei in Einstellung verbleibendem Antriebshebel von der Koppelbaugruppe freigebbar ist.The invention is in the field of electrical switches and can be used in the structural design of a drive train for a movable contact of an electrical switch, which is provided with a pivotable drive lever, a pivotably mounted contact carrier that receives the contact and a coupling assembly for supporting the contact carrier on the drive lever and which has a catching device for the contact carrier, by means of which the contact carrier can be secured against bouncing - with the current-limiting opening of the movable contact due to electrodynamic forces acting on it. The invention relates to drive trains in which the contact carrier can be converted from an off position to an on position on the one hand by swiveling the drive lever - from an exhibition into an adjustment - and on the other hand for swiveling from its on position to the off position with the drive lever remaining in the setting, can be released by the coupling assembly.
Bei einem bekannten dreipoligen elektrischen Schalter ist ein derartiger Antriebsstrang jeweils den bewegbaren Kontakten der beiden äußeren Pole zugeordnet, wobei jeder dieser beiden Antriebsstränge ein am Kontaktträger schwenkbar angeordnetes, unter der Einwirkung einer ersten Feder stehendes Fangelement und ein dem Fangelement zugeordnetes Gegenstück aufweist und wobei bei in Ein-Stellung befindlichem Antriebshebel und in AUS-Position befindlichen Kontaktträger das Gegenstück vom Fangelement hintergriffen ist (US 5,912,605). Die Koppelbaugruppe der beiden äußeren Antriebsstränge umfasst hierbei je- weils einen Bolzen, der bei in EIN-Position befindlichem Kontaktträger in einer Raststellung an einer Kurvenfläche des Kontaktträgers anliegt . Um den Kontaktträger zum Umschwenken in seine AUS-Position bei in EIN-Stellung verbleibender Antriebswelle freizugeben, kann der Bolzen kraftabhängig aus seiner Raststellung am Kontaktträger herausgleiten. Der Bolzen ist fest mit einem Hebel verbunden, der seinerseits auf einer Traverse angeordnet ist. Auf dieser Traverse ist auch der Kontaktträger des mittleren Poles fest angeordnet. Dieser mittlere Kontaktträger ist an dem Antriebshebel angelenkt. Der mittlere Kontaktträger ist daher Teil der Koppelbaugruppen der beiden äußeren Antriebsstränge. Um das als ortsfester Bolzen ausgebildete Gegenstück mittels des als Fanghaken ausgebildeten Fangelementes zu umgreifen, ist eine weitere als Blattfeder ausgebildete Feder erforderlich, die an dem mit der Traverse fest verbundenen Hebel angeordnet ist und die einen lang ausgebildeten, gebogenen freien Endschenkel aufweist, mittels dessen das Fangelement beim Umschwenken des äußeren Kontaktträgers entgegen der Kraft der ersten Feder zum Umgreifen eines im Schalter ortsfest angeordneten Bolzens schwenkbar ist. Um ein Zurückprellen des Kontaktträgers in seine EIN-Position sicher auszuschließen, ist eine genaue Ab- Stimmung der Federkräfte beider Federn und eine präzise Anordnung der Blattfeder in der Bewegungsbahn des Fangelementes erforderlich. - Bei dieser Ausgestaltung des Antriebsstranges kann der mittlere Kontaktträger nur gemeinsam mit den beiden äußeren Kontaktträgern und nur unter gleichzeitiger Rückstellung des Antriebshebels in seine AUS-Stellung umgeschwenkt werden. Er kann insbesondere nicht auf die gleiche Weise wie die beiden äußeren Kontaktträger gegen Prellen gesichert werden. Bei zeitgleichem Umschwenken des mittleren Kontaktträgers und eines äußeren Kontaktträgers besteht zudem die Gefahr, dass die weitere Feder nicht oder nicht ausreichend weit in die Bewegungsbahn des Fangelementes eingreift und der äußere Kontaktträger nicht mehr gegen Prellen gesichert ist.In a known three-pole electrical switch, such a drive train is assigned to the movable contacts of the two outer poles, each of these two drive trains having a catch element pivotably arranged on the contact carrier, under the action of a first spring, and a counterpart assigned to the catch element, and wherein in The drive lever is in the on position and the contact carrier is in the OFF position and the counterpart is engaged by the catch element (US Pat. No. 5,912,605). The coupling assembly of the two outer drive trains in each case comprises a bolt which, when the contact carrier is in the ON position, bears against a curved surface of the contact carrier in a latching position. To swivel the contact carrier To release in its OFF position with the drive shaft remaining in the ON position, the bolt can slide out of its locking position on the contact carrier depending on the force. The bolt is firmly connected to a lever, which in turn is arranged on a crossbar. The contact carrier of the middle pole is also fixedly arranged on this traverse. This middle contact carrier is articulated on the drive lever. The middle contact carrier is therefore part of the coupling modules of the two outer drive trains. In order to encompass the counterpart designed as a stationary bolt by means of the catch element designed as a catch hook, a further spring designed as a leaf spring is required, which is arranged on the lever firmly connected to the cross member and which has a long, curved free end leg, by means of which the Catching element when pivoting the outer contact carrier against the force of the first spring for gripping a bolt arranged fixed in the switch is pivotable. In order to reliably prevent the contact carrier from bouncing back into its ON position, the spring forces of both springs must be precisely matched and the leaf spring must be precisely arranged in the trajectory of the catching element. - In this embodiment of the drive train, the middle contact carrier can only be swung into its OFF position together with the two outer contact carriers and only with the simultaneous resetting of the drive lever. In particular, it cannot be secured against bouncing in the same way as the two outer contact carriers. If the middle contact carrier and an outer contact carrier swivel around at the same time, there is also the risk that the additional spring does not engage or does not engage sufficiently in the movement path of the catching element and the outer contact carrier is no longer secured against bouncing.
Bei einem anderen bekannten Schalter sind die den einzelnenIn another known switch, they are the individual
Polen zugeordneten Antriebsstränge derart ausgebildet, dass alle Kontaktträger unabhängig voneinander zum Umschwenken kraftabhängig freigebbar und gegen ein Zurückprellen sicherbar sind (DE 199 10 172 AI) . Hierbei weisen die Antriebsstränge jeweils als Koppelbaugruppe einen am Kontaktträger schwenkbar gelagerten Kulissenhebel und einem am Antriebshe- bei angelenkten Koppelhebel auf, wobei ein Bolzen des Koppelhebels in die Kulisse des Kulissenhebels eingreift. Der Kulissenhebel bildet zudem ein Widerlager für Kontaktkraftfedern, mittels derer der bewegbare Kontakt mit der erforderlichen Kontaktkraft an einem zugeordneten ortsfesten Kontakt abstützbar ist. Bei diesem bekannten Schalter ist der Kulissenhebel unter der Einwirkung elektrodynamischer Kräfte, die ein Abheben des bewegbaren Kontakts von dem ihm zugeordneten ortfesten Kontakt bewirken, über die an ihm abgestützten Kon- taktkraftfedern schwenkbar. Bei einer Schwenkung des Kulis- senhebels gleitet der an dem Koppelhebel angeordnete Bolzen aus einem ersten Kulissenabschnitt in einen zweiten Kulissenabschnitt. Am Ende dieses zweiten Kulissenabschnittes ist ein dritter das Fangelement bildender Kulissenabschnitt angeordnet, in dem der Bolzen festgelegt wird. - Da der Kulissenhe- bei und der den Bolzen tragende Koppelhebel Teil sowohl der Koppelbaugruppe als auch der Fangeinrichtung sind, ist ein derartiges Fangelement nur bei Schaltern anwendbar, deren Antriebsstrang einen mit einem Kulissenhebel versehenen Kontaktträger aufweist.Drive trains assigned to Poland are designed in such a way that all contact carriers are pivotable independently of one another can be released depending on the force and can be secured against rebounding (DE 199 10 172 AI). Here, the drive trains each have a coupling assembly, a link lever pivotally mounted on the contact carrier and a coupling lever articulated on the drive lever, a pin of the coupling lever engaging in the link of the link lever. The link lever also forms an abutment for contact force springs, by means of which the movable contact with the required contact force can be supported on an assigned stationary contact. In this known switch, the link lever can be pivoted under the action of electrodynamic forces which cause the movable contact to be lifted from the stationary contact assigned to it, via the contact force springs supported on it. When the link lever is pivoted, the bolt arranged on the coupling lever slides from a first link section into a second link section. At the end of this second link section, a third link section forming the catch element is arranged, in which the bolt is fixed. - Since the link arm and the coupling lever carrying the bolt are part of both the coupling assembly and the catching device, such a catching element can only be used with switches whose drive train has a contact carrier provided with a link lever.
Ausgehend von einem Antriebsstrang mit den Merkmalen des Oberbegriffes des Anspruches 1 (US 5,912,605) liegt der Erfindung die Aufgabe zugrunde, das Zusammenspiel von Koppelbaugruppe und Fangeinrichtung zu vereinfachen.Starting from a drive train with the features of the preamble of claim 1 (US 5,912,605), the invention has for its object to simplify the interaction of the coupling assembly and safety gear.
Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, dass das Gegenstück mit dem Antriebshebel schwenkbar ist und dass das Fangelement beim Umschwenken des Kontaktträgers schnapp- riegelartig über das Gegenstück gleitbar ist.According to the invention, this object is achieved in that the counterpart can be pivoted with the drive lever and in that the catching element can be slid over the counterpart like a snap lock when the contact carrier is pivoted.
Bei einer derartigen Ausgestaltung sind die Elemente der Fangeinrichtung nicht mehr konstruktiver Bestandteil der Koppelbaugruppe, so dass die Fangeinrichtung für Koppelbaugruppen unterschiedlicher Gestaltung verwendbar ist. Sie kann z.B. auch die erwähnten (US 5,912,605 und DE 199 10 172 AI) bekannten Fangeinrichtungen ersetzen.In such a configuration, the elements of the catching device are no longer a structural component of the Coupling assembly, so that the catching device can be used for coupling assemblies of different designs. For example, it can also replace the known catching devices (US Pat. No. 5,912,605 and DE 199 10 172 AI).
Eine Weiterbildung der Erfindung sieht vor, dass das Fangelement eine Ruhestellung aufweist, in der es sich unter der Krafteinwirkung der Feder mittels eines Anschlages an einer Anschlagfläche des Kontaktträgers abstützt. Aufgrund dieses Anschlages ist der Antriebshebel unabhängig vom Fangelement in seine AUS-Stellung schwenkbar, so dass bei einer solchen Schwenkung des Antriebshebels der Kontaktträger zwangsläufig von der Fangeinrichtung freigegeben wird.A further development of the invention provides that the catch element has a rest position in which it is supported under the force of the spring by means of a stop on a stop surface of the contact carrier. Because of this stop, the drive lever can be pivoted into its OFF position independently of the catch element, so that when the drive lever is pivoted in this way, the contact carrier is inevitably released by the catch device.
Das Gegenstück kann zweckmäßigerweise von einem den Antriebshebel mit der Koppelbaugruppe verbindenden Bolzen gebildet sein.The counterpart can expediently be formed by a bolt connecting the drive lever to the coupling assembly.
Eine gemäß der Erfindung ausgebildete Fangeinrichtung lässt sich ohne wesentliche konstruktive Veränderungen auch in Antriebsstränge integrieren, bei denen bisher keine Fangeinrichtung vorgesehen ist. - Die Fangeinrichtung kann mit Vorteil in Antriebsstränge integriert werden, bei denen die Koppelbaugruppe eine an sich bekannte kraftabhängig verkürz- bare Stützweite aufweist. - Wenn man bei derartigen Antriebssträngen die Koppelbaugruppe so ausgestaltet, dass die Verkürzung der Stützweite blockierbar ist, können solche Antriebsstränge sowohl in strombegrenzenden als auch in "dynamisch festen" Schaltern eingesetzt werden.- Eine Koppel- baugruppe mit kraftabhängig verkürzbarer Stützweite kann als Knickhebel (wie er beispielsweise aus der DE 197 40 422 AI bekannt ist) oder als teleskopartige Verklinkungseinrichtung (wie sie beispielsweise aus der EP 0 398 461 A2 bekannt ist) ausgebildet sein. Ein Ausführungsbeispiel des neuen Antriebsstranges in vier verschiedenen Phasen seines Bewegungsablaufes ist in den Figuren 1 bis 4 dargestellt. Dabei zeigenA safety gear designed according to the invention can also be integrated into drive trains in which no safety gear has previously been provided, without significant design changes. - The safety gear can advantageously be integrated into drive trains in which the coupling assembly has a known span that can be shortened depending on the force. - If the coupling assembly is designed in such a way that the shortening of the span can be blocked, such drive trains can be used in both current-limiting and in "dynamically fixed" switches. - A coupling module with a span that can be shortened depending on the force can be used as an articulated lever (as it is known for example from DE 197 40 422 AI) or as a telescopic latching device (as is known for example from EP 0 398 461 A2). An embodiment of the new drive train in four different phases of its motion sequence is shown in Figures 1 to 4. Show
Figur 1 den Antriebsstrang bei in einer EIN-Stellung befindlichem Antriebshebel und in einer EIN-Position befindlichem Kontaktträger,FIG. 1 shows the drive train with the drive lever in an ON position and a contact carrier in an ON position,
Figur 2 den Antriebsstrang beim Überschwenken des Kontaktträgers in eine AUS-Position, bei in EIN-Stellung verbleibendem Antriebshebel,FIG. 2 shows the drive train when the contact carrier is pivoted into an OFF position, with the drive lever remaining in the ON position,
Figur 3 den Antriebsstrang mit einem in seiner AUS-Position mittels einer Fangeinrichtung gegen Prellen gesicherten Kontaktträger und Figur 4 den Antriebssträng mit einem von der Fangeinrichtung freigegebenen Kontaktträger bei in einer AUS-Stellung befindlichem Antriebshebel und in AUS-Position befindlichem Kontaktträger .3 shows the drive train with a contact carrier secured in its OFF position by means of a catching device against bouncing and FIG. 4 shows the drive train with a contact carrier released by the catching device when the drive lever is in an OFF position and the contact carrier is in the OFF position.
Gemäß den Figuren 1 bis 4 weist der Antriebssträng für einen als Kontakthebel ausgebildeten, um ein erstes Schwenklager 1 bewegbaren Kontakt 2 eines elektrischen Schalters einen auf einer Schaltwelle 3 angeordneten Antriebshebel 4, einen den bewegbaren Kontakt 2 tragenden, um ein zweites Schwenklager 5 drehbaren Kontaktträger 6 und eine den Kontaktträger 6 mit dem Antriebshebel 4 verbindende, als Knickhebel ausgebildete Koppelbaugruppe 7 auf. Der bewegbare Kontakt 2 ist hierbei mittels am Kontaktträger 6 abgestützter Kontaktkraftfedern 8 je nach Schaltzustand entweder über ein erstes Schaltstück 9 an einem zweiten Schaltstück 10 eines ortsfesten Kontaktes 11 oder über einen Teilbereich 12 seiner umlaufenden Kante an einer ersten Anschlagfläche 13 des Kontaktträgers abgestützt. In den Antriebsstrang ist eine Fangeinrichtung 14 integriert, die ein am Kontaktträger 6 schwenkbar angeordnetes, als Fanghaken ausgebildetes Fangelement 15 und ein auf dem Antriebs- hebel 4 angeordnetes, dem Fangelement 15 zugeordnetes Gegenstück 16 aufweist. Als Gegenstück 16 dient ein erster Bolzen, der den Antriebshebel 4 mit dem Knickhebel 7 verbindet. Als Schwenklager 17 des Fanghakens 15 dient ein zweiter Bolzen, der den Knickhebel 7 mit dem Kontaktträger 6 verbindet. - Als Gegenstück kann anstelle des ersten Bolzens auch ein anderes, bedarfsweise auch an der Schaltwelle ausgebilde- tes, mit dem Antriebshebel schwenkbares Gegenstück dienen. In gleicher Weise kann ein gesondertes Schwenklager für das Fangelement am Kontaktträger ausgebildet sein.According to FIGS. 1 to 4, the drive train for a contact 2 of an electrical switch designed as a contact lever and movable about a first pivot bearing 1 has a drive lever 4 arranged on a switching shaft 3, a contact carrier 6 carrying the movable contact 2 and rotatable about a second pivot bearing 5 and a coupling assembly 7 which connects the contact carrier 6 to the drive lever 4 and is designed as an articulated lever. The movable contact 2 is supported by means of contact force springs 8 supported on the contact carrier 6, depending on the switching state, either via a first contact piece 9 on a second contact piece 10 of a fixed contact 11 or via a partial region 12 of its peripheral edge on a first stop surface 13 of the contact carrier. A catch device 14 is integrated in the drive train, which has a catch element 15 which is pivotably arranged on the contact carrier 6 and is designed as a catch hook, and a counterpart 16 which is arranged on the drive lever 4 and is assigned to the catch element 15. A first bolt, which connects the drive lever 4 to the articulated lever 7, serves as counterpart 16. A second bolt, which connects the articulated lever 7 to the contact carrier 6, serves as the pivot bearing 17 of the catch hook 15. - Instead of the first bolt, another counterpart can also be used, which if necessary is also formed on the selector shaft and can be pivoted with the drive lever. In the same way, a separate pivot bearing for the catch element can be formed on the contact carrier.
Gemäß Figur 1, die den Antriebsstrang im Ξinschaltzustand bei normalem Betrieb des Schalters zeigt, befindet sich das Fangelement 15 in seiner Ruhestellung. - Unter „normalem Betrieb" wird dabei ein Bereich von Strömen bis in den Überlastbereich verstanden, bei denen die zwischen den Kontakten wirkenden elektrodynamischen Kräfte unterhalb eines vorzugebenden Grenzwertes liegen und die Kontakte aufgrund der diesen Kräften entgegenwirkenden Kräften der Kontakttaktkraftfedern in geschlossenem Zustand verbleiben. - Zur Aufrechterhaltung dieser Ruhestellung weist das Fangelement 15 einen Anschlag 18 auf, über den es sich unter der Kraft einer auf ihn ein- wirkenden Feder 19 an einer zweiten Anschlagfläche 20 desAccording to FIG. 1, which shows the drive train in the on state during normal operation of the switch, the catch element 15 is in its rest position. - "Normal operation" is understood to mean a range of currents up to the overload range in which the electrodynamic forces acting between the contacts are below a predetermined limit value and the contacts remain in the closed state due to the forces of the contact clock force springs counteracting these forces Maintaining this rest position, the catching element 15 has a stop 18, by means of which it acts on a second stop surface 20 of the spring 19 under the force of a spring 19 acting thereon
Kontaktträgers abstützt. Der Kontaktträger weist zur Aufnahme der als Schraubendruckfeder ausgebildeten Feder 19 eine taschenartige Ausnehmung 21 als Widerlager auf. Die Feder 19 und das Widerlager 21 der Feder können jedoch auch jede an- dere, dem vorliegenden Zweck dienende Gestalt aufweisen. -Contact carrier supports. The contact carrier has a pocket-like recess 21 as an abutment for receiving the spring 19 designed as a helical compression spring. However, the spring 19 and the abutment 21 of the spring can also have any other shape that serves the present purpose. -
Der Knickhebel 7 wirkt bei normalem Betrieb als starres, den Kontaktträger 6 mit dem Antriebshebel 4 verbindendes Stützglied.In normal operation, the articulated lever 7 acts as a rigid support member connecting the contact carrier 6 with the drive lever 4.
Gemäß Figur 2, die den Antriebsstrang in einem Zustand zeigt, bei dem der Kontaktträger aufgrund hoher Ströme - bei denen die zwischen den Kontakten wirkenden elektrodynamischen Kräfte nicht mehr unterhalb des vorgegebenen Grenzwertes liegen - bei in EIN-Stellung verbleibendem Antriebshebel in eine AUS-Position umschwenkt. In dieser Phase verkürzt sich die Stützweite des Knickhebels kraftabhängig in einer beispielsweise aus der DE 197 40 422 AI bekannten Weise . Der Fangha- ken 15 weist an seinem freien Ende 22 eine Gleitfläche 23 auf, die beim Umschwenken des Kontaktträgers 6 in seine Ausstellung auf den ersten Bolzen 16 trifft. Hierbei ist die Gleitfläche 23 so angeordnet, dass der Fanghaken 15 entgegen der Federkraft angehoben wird, bei weiterer Drehbewegung des Kontaktträgers über den ersten Bolzen gleitet und schließlich den ersten Bolzen schnappriegelartig hintergreift und dabei in seine Ruhestellung zurückkehrt.According to FIG. 2, which shows the drive train in a state in which the contact carrier swivels into an OFF position with the drive lever remaining in the ON position due to high currents - in which the electrodynamic forces acting between the contacts are no longer below the predetermined limit value , In this phase, the span of the articulated lever shortens depending on the force in a manner known for example from DE 197 40 422 AI. The Fangha Ken 15 has at its free end 22 a sliding surface 23 which meets the first bolt 16 when the contact carrier 6 is pivoted into its exhibition. Here, the sliding surface 23 is arranged such that the catch hook 15 is raised against the spring force, slides over the first bolt when the contact carrier rotates further, and finally engages behind the first bolt in a snap-lock manner and thereby returns to its rest position.
Gemäß Figur 3 ist der Kontaktträger 6 dadurch in seiner AUS- Position festgelegt, so dass ein Zurückprellen des Kontaktträgers in seine EIN-Position sicher verhindert ist. Hierbei hintergreift der Fanghaken 15 den ersten Bolzen 16 jedoch nur soweit, dass er nicht in dessen Bewegungsbahn hineinreicht.According to FIG. 3, the contact carrier 6 is thereby fixed in its OFF position, so that a rebound of the contact carrier into its ON position is reliably prevented. Here, however, the catch hook 15 only engages behind the first bolt 16 to such an extent that it does not extend into its path of movement.
Während der anhand der Figuren 1 bis 3 erläuterten Vorgänge behält der auf der Schaltwelle 3 fest angeordnete Antriebshebel 4 seine EIN-Stellung bei. In seine AUS-Stellung gelangt der Antriebshebel entsprechend der Darstellung in der Figur 4 erst dann, wenn beispielsweise der hohe Strom, der die elektrodynamische Öffnung der Kontakte 2 und 11 bewirkt hat, auch von einem in bekannter Weise im Schalter vorgesehenen Überstromauslöser erfasst und verarbeitet worden ist, um eine Verklinkung der Schaltwelle 3 freizugeben. Diese führt dann eine Drehung in der Richtung eines in Figur 3 gezeigten Pfeiles 24 aus.During the processes explained with reference to FIGS. 1 to 3, the drive lever 4 which is fixedly arranged on the selector shaft 3 maintains its ON position. The drive lever reaches its OFF position, as shown in FIG. 4, only when, for example, the high current which has caused the electrodynamic opening of contacts 2 and 11 has also been detected and processed by an overcurrent release provided in the switch in a known manner is to release a latch of the selector shaft 3. This then executes a rotation in the direction of an arrow 24 shown in FIG. 3.
Gemäß Figur 4 wird der erste Bolzen 16 hierbei aus seiner vom Fanghaken 15 hintergriffenen Position herausgeschwenkt. Da- durch wird einerseits der Kontaktträger 6 durch den FanghakenAccording to FIG. 4, the first bolt 16 is pivoted out of its position under which the catch hook 15 engages. In this way, on the one hand, the contact carrier 6 becomes through the catch hook
15 freigegeben und andererseits der Knickhebel 7 derart gestreckt, dass er wieder als starres Stützglied wirkt. Der Fanghaken 15 verbleibt hierbei in seiner Ruhestellung. Der Antriebsstrang ist wieder einschaltbereit.15 released and on the other hand, the articulated lever 7 is stretched such that it acts again as a rigid support member. The catch hook 15 remains in its rest position. The drive train is ready to be switched on again.
Die Koppelbaugruppe kann alternativ zu der Ausgestaltung als Knickhebel auch als teleskopartige Verklinkungseinrichtung (ähnlich EP 0 398 461 A2 ) ausgebildet sein. Zweckmäßig wird hierbei der zum Verbinden des Gleitstückes der Verklinkungs- einrichtung mit dem Kurbelarm der Schaltwelle vorgesehene Stift axial verlängert, um das im Sinne der Erfindung vorge- sehene Gegenstück zu bilden. As an alternative to the design as an articulated lever, the coupling assembly can also be used as a telescopic latching device (Similar to EP 0 398 461 A2). The pin provided for connecting the sliding piece of the latching device to the crank arm of the selector shaft is expediently extended axially in order to form the counterpart provided in the sense of the invention.

Claims

Patentansprüche claims
1. Antriebsstrang für einen bewegbaren Kontakt (2) eines elektrischen Schalters, bestehend aus einem schwenkbaren Antriebshebel (4) , einem den Kontakt (2) aufnehmenden schwenkbar gelagerten Kontaktträger (6), einer Koppelbaugruppe (7) , mittels derer der Kontaktträger (6) am Antriebshebel (4) abgestützt ist, und einer Fangeinrichtung (14) für den Kontaktträger (6) , - bei dem der Kontaktträger (6) durch Schwenken des Antriebshebels (4) - von einer AUS-Stellung in eine EIN-Stellung - aus einer AUS-Position in eine EIN-Po- sition überführbar ist, bei dem der Kontaktträger (6) zum Umschwenken aus der EIN-Position in die AUS-Position bei in EIN-Stellung verbleibendem Antriebshebel (4) von der Koppelbaugruppe (7) kraftabhängig freigebbar ist und bei dem die Fangeinrichtung (14) ein am Kontaktträger (6) schwenkbar angeordnetes, unter der Einwirkung einer Feder (19) stehendes Fangelement (15) und ein dem Fangelement (15) zugeordnetes Gegenstück (16) aufweist, wobei bei in EIN-Stellung befindlichem Antriebshebel (4) und in AUS-Position befindlichem Kontaktträger (6) das Gegenstück (16) vom Fangelement (15) hintergriffen ist. d a d u r c h g e k e n n z e i c h n e t , dass das Gegenstück (16) mit dem Antriebshebel (4) schwenkbar ist und dass das Fangelement (15) beim Umschwenken des Kon- taktträgers (6) schnappriegelartig über das Gegenstück (16) gleitbar ist. 1. Drive train for a movable contact (2) of an electrical switch, comprising a pivotable drive lever (4), a pivotably mounted contact carrier (6) receiving the contact (2), a coupling assembly (7), by means of which the contact carrier (6) is supported on the drive lever (4), and a catching device (14) for the contact carrier (6), - in which the contact carrier (6) by pivoting the drive lever (4) - from an OFF position to an ON position - from a OFF position can be converted into an ON position, in which the contact carrier (6) can be released by the coupling assembly (7) in a force-dependent manner for pivoting from the ON position to the OFF position with the drive lever (4) remaining in the ON position and in which the catching device (14) has a catching element (15) which is pivotably arranged on the contact carrier (6) and is under the action of a spring (19) and a counterpart (16) assigned to the catching element (15). St ellung drive lever (4) and in the OFF position contact carrier (6) the counterpart (16) is engaged by the catch element (15). characterized in that the counterpart (16) can be pivoted with the drive lever (4) and that the catch element (15) can be slid over the counterpart (16) like a snap lock when the contact carrier (6) is pivoted around.
2. Anordnung nach Anspruch 1 , d a d u r c h g e k e n n z e i c h n e t , dass das Fangelement (15) eine Ruhestellung aufweist, in der es sich unter der Krafteinwirkung der Feder (19) mittels eines Anschlages (18) an einer Anschlagfläche (20) des Kontaktträgers (6) abstützt.2. Arrangement according to claim 1, so that the catch element (15) has a rest position in which it is supported under the force of the spring (19) by means of a stop (18) on a stop surface (20) of the contact carrier (6).
3. Anordnung nach einem der Ansprüche 1 oder 2 , d a d u r c h g e k e n n z e i c h n e t ,3. Arrangement according to one of claims 1 or 2, d a d u r c h g e k e n n z e i c h n e t,
- dass das Gegenstück (16) von einem den Antriebshebel (4) mit der Koppelbaugruppe (7) verbindenden Bolzen gebildet ist .- That the counterpart (16) is formed by a drive lever (4) with the coupling assembly (7) connecting bolts.
4. Anordnung nach einem der Ansprüche 1 bis 3, d a du r c h g e k e n n z e i c h n e t , dass die Stützweite der Koppelbaugruppe (7) kraftabhängig verkürzbar ist.4. Arrangement according to one of claims 1 to 3, so that the span of the coupling assembly (7) can be shortened depending on the force.
5. Anordnung nach Anspruch 4 , d a du r c h g e k e n n z e i c h n e t , dass die Koppelbaugruppe (7) als Knickhebel ausgebildet ist.5. Arrangement according to claim 4, so that the coupling assembly (7) is designed as an articulated lever.
6. Anordnung nach Anspruch 4, d a du r c h g e k e nn z e i c hn e t , dass die Koppelbaugruppe als teleskopartige Verklinkungs- einrichtung ausgebildet ist. 6. Arrangement according to claim 4, so that the coupling assembly is designed as a telescopic latching device.
PCT/DE2001/002805 2000-09-28 2001-07-20 Drivetrain for a moving contact of an electrical switch WO2002027743A1 (en)

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DE2000149728 DE10049728C2 (en) 2000-09-28 2000-09-28 Drive train for a movable contact of an electrical switch
DE10049728.4 2000-09-28

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EP2228810A3 (en) * 2009-03-11 2014-01-08 LS Industrial Systems Co., Ltd Circuit breaker with rebound preventor
US9530580B2 (en) 2013-04-24 2016-12-27 Siemens Aktiengesellschaft Drive for a switching device
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CN107004542B (en) * 2014-12-04 2019-06-14 伊顿公司 Electric switch equipment and with bar axis clamping and holding assembly thereon
WO2023241832A1 (en) * 2022-06-15 2023-12-21 Hitachi Energy Ltd Anti-rebound protection device and circuit breaker comprising the same

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