EP0756749B1 - Tensioner for a spring-loading device - Google Patents

Tensioner for a spring-loading device Download PDF

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Publication number
EP0756749B1
EP0756749B1 EP95915768A EP95915768A EP0756749B1 EP 0756749 B1 EP0756749 B1 EP 0756749B1 EP 95915768 A EP95915768 A EP 95915768A EP 95915768 A EP95915768 A EP 95915768A EP 0756749 B1 EP0756749 B1 EP 0756749B1
Authority
EP
European Patent Office
Prior art keywords
lever
ratchet wheel
spring
pawl
cam disc
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
EP95915768A
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German (de)
French (fr)
Other versions
EP0756749A1 (en
Inventor
Ludvik Godesa
Husein Hodzic
Adolf Wihan
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0756749A1 publication Critical patent/EP0756749A1/en
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Publication of EP0756749B1 publication Critical patent/EP0756749B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3063—Decoupling charging handle or motor at end of charging cycle or during charged condition

Definitions

  • the invention relates to a tensioning device for a spring accumulator of a circuit breaker with a pivoted hand lever, a ratchet wheel which can be rotated step by step by means of a transport pawl connected to the hand lever and which can be locked against turning back by a pawl, a cam disc coupled to the ratchet wheel for actuating a lever system which is connected to the spring accumulator and has a knee joint and which can be moved from the fully tensioned position along a recessed edge of the cam disc to the starting position.
  • a tensioning device of this type is, for example, by the EP-B-0 089 463 has become known. Proceeding from this lies the Invention based on the object, a retroactive effect of To prevent spring accumulator on the hand lever when shifting so that neither the operator by switching the Circuit breakers are still endangered the switching process can even be influenced by the operator.
  • a device for interrupting the Power transmission from the hand lever to the ratchet fully tensioned spring accumulator is provided, wherein the device one on the recessed edge of the Cam attached in the path of the knee joint of the Lever system protruding projection and one on the Has cam attached driver that with a Working surface of a stop lever cooperating in this way is arranged that when reaching the fully tensioned Position the transport pawl by loading the Stop lever by the driver of the ratchet wheel can be lifted and also when the projection is applied the cam through the knee joint during the transfer of the lever system in the starting position of the stop lever by moving the driver away from the work surface can be released for renewed engagement of the transport pawl into the ratchet wheel.
  • the device ensures that the Hand lever when the fully cocked position is reached the spring accumulator decouples and when relaxing the Spring accumulator for switching on the circuit breaker immediately is effective again.
  • the device for decoupling the hand lever can be used with the fixed stop lever with the insertion of a Coupling spring connected decoupling lever include the one that interacts with the transport pawl in this way Work surface has that the transport pawl from that Ratchet edge can be lifted off or to engage the ratchet wheel can be released.
  • the clutch spring ensures that the Driver regardless of the movement of the transport pawl can be operated.
  • the stop lever and the decoupling lever can by one common pivot pin to be movable, the Disengaging lever a tensioning shaft carrying the ratchet wheel overlapping opening.
  • the device therefore takes takes up little space and is tight around the wave of Clamping device arranged around.
  • the lever arrangement shown schematically in FIG. 1 serves for actuating a switch contact arrangement, the one movable contact lever 1 and a fixed Has counter contact 2.
  • the movable contact lever 1 is on a pivotally mounted lever bracket 3 articulated and is provided with a contact force spring 4.
  • Two Toggle levers 5 and 6 connect the lever bracket 3 in an articulated manner a selector shaft 7, which is common to several poles Circuit breaker is provided.
  • a selector shaft 7, which is common to several poles Circuit breaker is provided.
  • the Toggle lever 5 and 6 shown in a folded position, in which the toggle 6 rests against a stop 10.
  • a spring accumulator 12 is provided, which is designed as a helical compression spring.
  • the Spring 12 serves a cam 13 in connection with toggle levers 14 and 15, at the connecting joint 16 the Cam 13 by means of a roller 17 shown in dashed lines attacks.
  • a roller 17 shown in dashed lines attacks.
  • One at that Knee joint 16 attacking support lever 20 is by means of a two-stage engagement latch supported. This includes a switch-on half shaft 21, a pivotable Main switch pawl 22, one with the main switch pawl 22 connected roller lever 23 and one with the support lever 20 connected auxiliary pawl 24.
  • the device shown in Figure 2 is a tension shaft 45 assigned to the cam 13 and has one on the Clamping shaft seated hand lever 46 for gradual clamping of the spring accumulator 12 by means of a ratchet wheel 47.
  • the Pawl 47 is rigidly coupled to the tension shaft 45. With a tooth 48 of the ratchet wheel 47 is one on the hand lever 46 hinged and provided with a pressure spring 51 Transport pawl 50 engaged.
  • the transport pawl 50 for example a pawl 52 is mounted on the opposite side arranged, which is also under the influence of a pressure spring 53 in engagement with a tooth 48 of the ratchet wheel 47 stands.
  • Around a further fixed bearing 54 are a stop lever 55 and a decoupling lever 56 pivotable stored.
  • the decoupling lever 56 has a stop surface 57 for the stop lever 55, a tension spring 60 the stop lever 55 and the decoupling lever 56 biased against each other. With an opening 59 overlaps Decoupling lever 56, the tensioning shaft 45.
  • the stop lever 55 is provided with a work surface 66 which is shown in FIG The position of the parts faces a driver 61, which is attached to the cam 13. Also owns the decoupling lever 56 a work surface 62 for Actuation of the transport pawl 50.
  • the recessed Edge 63 of cam 13 has a projection 64, which protrudes in the way of the roller 17 when it comes out of the cocked end position in the direction of an arrow 65 in the Near the tension shaft 45.
  • a tooth-like recess 65 in one of the teeth of the Klinkenrades 47 ensures that in the last section of the Clamping process of the spring accumulator 12 (Fig. 1) the clamping shaft 45 not one of the full pitch of the teeth 48 of the Pawl wheel 47 are turned back corresponding angle can, if the clamping stroke with the hand lever 46 is not is fully executed.

Abstract

A tensioner for a spring-loading device (12) of a power switch comprises a pivoting hand lever (46) and a ratchet wheel (47) which can be rotated in steps by a transport pawl (50) and prevented from rotating backwards by a locking pawl (52). A cam disc (13) acting on the spring (12) can be rotated by the ratchet wheel (47). A catch (61) on the cam disc (13) and a projection (64) on the set-back edge (63) of the cam disc (13) control a device for interrupting the transmission of force from the hand lever (46) to the ratchet wheel (47) once the spring (12) is fully tensioned.

Description

Die Erfindung betrifft eine Spannvorrichtung für einen Federspeicher eines Leistungsschalters mit einem schwenkbar gelagerten Handhebel,
einem Klinkenrad, das durch eine mit dem Handhebel verbundene Transportklinke schrittweise drehbar und durch eine Sperrklinke gegen Zurückdrehen sperrbar ist,
eine mit dem Klinkenrad gekuppelte Kurvenscheibe zur Betätigung eines mit dem Federspeicher verbundenen, ein Kniegelenk aufweisenden Hebelsystems, das aus der vollständig gespannten Stellung entlang einer rückspringenden Kante der Kurvenscheibe in die Ausgangsstellung bewegbar ist.The invention relates to a tensioning device for a spring accumulator of a circuit breaker with a pivoted hand lever,
a ratchet wheel which can be rotated step by step by means of a transport pawl connected to the hand lever and which can be locked against turning back by a pawl,
a cam disc coupled to the ratchet wheel for actuating a lever system which is connected to the spring accumulator and has a knee joint and which can be moved from the fully tensioned position along a recessed edge of the cam disc to the starting position.

Eine Spannvorrichtung dieser Art ist beispielsweise durch die EP-B-0 089 463 bekanntgeworden. Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Rückwirkung des Federspeichers auf den Handhebel beim Schalten zu verhindern, damit weder der Bedienende durch einen Schaltvorgang des Leistungsschalters gefährdet werden noch der Schaltvorgang selbst durch den Bedienenden beeinflußt werden kann.A tensioning device of this type is, for example, by the EP-B-0 089 463 has become known. Proceeding from this lies the Invention based on the object, a retroactive effect of To prevent spring accumulator on the hand lever when shifting so that neither the operator by switching the Circuit breakers are still endangered the switching process can even be influenced by the operator.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß das Kniegelenk des Hebelsystems mit der Kurvenscheibe zusammenwirkt, eine Vorrichtung zur Unterbrechung der Kraftübertragung von dem Handhebel zu dem Klinkenrad bei vollständig gespanntem Federspeicher vorgesehen ist, wobei die Vorrichtung einen an der rückspringenden Kante der Kurvenscheibe angebrachten, in den Weg des Kniegelenkes des Hebelsystems ragenden Vorsprung und einen an der Kurvenscheibe angebrachten Mitnehmer aufweist, der mit einer Arbeitsfläche eines Anschlaghebels derart zusammenwirkend angeordnet ist, daß beim Erreichen der vollständig gespannten Stellung die Transportklinke durch Beaufschlagung des Anschlaghebels durch den Mitnehmer von dem Klinkenrad abhebbar ist und ferner bei Beaufschlagung des Vorsprunges der Kurvenscheibe durch das Kniegelenk bei der Überführung des Hebelsystems in die Ausgangsstellung der Anschlaghebel durch Fortbewegung des Mitnehmers von der Arbeitsfläche freigebbar ist zwecks erneuten Eingriffes der Transportklinke in das Klinkenrad. Die Vorrichtung sorgt dafür, daß der Handhebel beim Erreichen der vollständig gespannten Stellung des Federspeichers entkoppelt und beim Entspannen des Federspeichers zum Einschalten des Leistungsschalters sofort wieder wirksam ist.This object is achieved according to the invention in that the knee joint of the lever system with the cam disc cooperates, a device for interrupting the Power transmission from the hand lever to the ratchet fully tensioned spring accumulator is provided, wherein the device one on the recessed edge of the Cam attached in the path of the knee joint of the Lever system protruding projection and one on the Has cam attached driver that with a Working surface of a stop lever cooperating in this way is arranged that when reaching the fully tensioned Position the transport pawl by loading the Stop lever by the driver of the ratchet wheel can be lifted and also when the projection is applied the cam through the knee joint during the transfer of the lever system in the starting position of the stop lever by moving the driver away from the work surface can be released for renewed engagement of the transport pawl into the ratchet wheel. The device ensures that the Hand lever when the fully cocked position is reached the spring accumulator decouples and when relaxing the Spring accumulator for switching on the circuit breaker immediately is effective again.

Die Vorrichtung zur Entkupplung des Handhebels kann einen mit dem ortsfest gelagerten Anschlaghebel unter Einfügung einer Kupplungsfeder verbundenen Entkupplungshebel umfassen, der eine mit der Transportklinke derart zusammenwirkende Arbeitsfläche besitzt, daß die Transportklinke von dem Klinkenrand abhebbar oder zum Eingriff in das Klinkenrad freigebbar ist. Die Kupplungsfeder sorgt dafür, daß der Mitnehmer unabhängig von der Bewegung der Transportklinke betätigt werden kann.The device for decoupling the hand lever can be used with the fixed stop lever with the insertion of a Coupling spring connected decoupling lever include the one that interacts with the transport pawl in this way Work surface has that the transport pawl from that Ratchet edge can be lifted off or to engage the ratchet wheel can be released. The clutch spring ensures that the Driver regardless of the movement of the transport pawl can be operated.

Der Anschlaghebel und der Entkupplungshebel können um einen gemeinsamen Gelenkzapfen bewegbar sein, wobei der Entkupplungshebel eine das Klinkenrad tragende Spannwelle übergreifende Öffnung besitzt. Die Vorrichtung nimmt daher nur wenig Raum in Anspruch und ist eng um die Welle der Spannvorrichtung herum angeordnet.The stop lever and the decoupling lever can by one common pivot pin to be movable, the Disengaging lever a tensioning shaft carrying the ratchet wheel overlapping opening. The device therefore takes takes up little space and is tight around the wave of Clamping device arranged around.

Der im Zuge des Spannvorganges des Federspeichers zuletzt mit der Sperrklinke zusammenwirkende Zahn des Klinkenrades kann an seinem Rücken zur Schaffung einer weiteren Raststellung eine zahnartige Ausnehmung besitzen. Hierdurch wird erreicht, daß der Bedienende veranlaßt wird, den Spannvorgang vollständig durchzuführen und beispielsweise nicht in einem Zustand zu unterbrechen, bei dem das Schaltschloß des Leistungsschalters bereits verklinkt, die Kurvenscheibe jedoch noch nicht in ihre Endstellung gelangt und damit der Handhebel noch nicht entkuppelt ist.The last one in the course of the tensioning of the spring accumulator the pawl cooperating tooth of the ratchet wheel can on his back to create another resting position have a tooth-like recess. This ensures that the operator is prompted for the clamping process complete and not, for example, in one Interrupt condition in which the switch lock of the Circuit breaker already latched, the cam However, it has not yet reached its end position and thus the Hand lever is not yet uncoupled.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert. Die

Figur 1
zeigt schematisch einen Teil einer Antriebsvorrichtung für einen Niederspannungs-Leistungsschalter, in der
Figur 2
ist eine Vorrichtung zur Unterbrechung der Kraftübertragung eines Handhebels gezeigt.
The invention is explained below with reference to the embodiment shown in the figures. The
Figure 1
shows schematically a part of a drive device for a low-voltage circuit breaker, in the
Figure 2
a device for interrupting the power transmission of a hand lever is shown.

Die in der Figur 1 schematisch gezeigte Hebelanordnung dient zur Betätigung einer Schaltkontaktanordnung, die einen bewegbaren Kontakthebel 1 und einen feststehenden Gegenkontakt 2 aufweist. Der bewegbare Kontakthebel 1 ist an einem schwenkbar gelagerten Hebelträger 3 gelenkig angebracht und ist mit einer Kontaktkraftfeder 4 versehen. Zwei Kniehebel 5 und 6 verbinden den Hebelträger 3 gelenkig mit einer Schaltwelle 7, die gemeinsam für mehrere Pole eines Leistungsschalters vorgesehen ist. Entsprechend der gezeigten ausgeschalteten Stellung des Hebelträgers 3 sind die Kniehebel 5 und 6 in einer eingeknickten Stellung gezeigt, in welcher der Kniehebel 6 an einem Anschlag 10 anliegt.The lever arrangement shown schematically in FIG. 1 serves for actuating a switch contact arrangement, the one movable contact lever 1 and a fixed Has counter contact 2. The movable contact lever 1 is on a pivotally mounted lever bracket 3 articulated and is provided with a contact force spring 4. Two Toggle levers 5 and 6 connect the lever bracket 3 in an articulated manner a selector shaft 7, which is common to several poles Circuit breaker is provided. According to the shown off position of the lever bracket 3 are the Toggle lever 5 and 6 shown in a folded position, in which the toggle 6 rests against a stop 10.

An einem Kniegelenk 11 zwischen den Kniehebeln 5 und 6 greifen weitere Hebel an, die für alle Pole eines Leistungsschalters gemeinsam sind und welche die Aufgabe haben, die insgesamt benötigte Betätigungsenergie bereitzustellen. Hierzu ist ein Federspeicher 12 vorgesehen, der als Schraubendruckfeder ausgebildet ist. Zum Spannen des Federspeichers 12 dient eine Kurvenscheibe 13 in Verbindung mit Kniehebeln 14 und 15, an deren Verbindungsgelenk 16 die Kurvenscheibe 13 mittels einer gestrichelt gezeigten Rolle 17 angreift. In der Stellung gemäß der Figur 1 sind die Kniehebel 14 und 15 nahezu in ihrer Strecklage, wodurch der Federspeicher 12 einschaltbereit gespannt ist. Ein an dem Kniegelenk 16 angreifender Stützhebel 20 ist mittels einer zweistufigen Einschaltverklinkung abgestützt. Diese umfaßt eine Einschalthalbwelle 21, eine schwenkbare Einschalthauptklinke 22, einen mit der Einschalthauptklinke 22 verbundenen Rollenhebel 23 sowie eine mit dem Stützhebel 20 verbundene Hilfskklinke 24.On a knee joint 11 between the toggle levers 5 and 6 attack other levers that are common to all poles Circuit breakers are common and which are the task have the total required actuation energy to provide. For this purpose, a spring accumulator 12 is provided, which is designed as a helical compression spring. To tension the Spring 12 serves a cam 13 in connection with toggle levers 14 and 15, at the connecting joint 16 the Cam 13 by means of a roller 17 shown in dashed lines attacks. In the position according to FIG Toggle lever 14 and 15 almost in their extended position, whereby the Spring 12 is ready to turn on. One at that Knee joint 16 attacking support lever 20 is by means of a two-stage engagement latch supported. This includes a switch-on half shaft 21, a pivotable Main switch pawl 22, one with the main switch pawl 22 connected roller lever 23 and one with the support lever 20 connected auxiliary pawl 24.

Ein weiteres, räumlich etwa parallel zu den genannten Teilen angeordnetes Hebelsystem verbindet den Federspeicher 12 mit dem Gelenk 11 zwischen den Kniehebeln 5 und 6. Zu diesem Hebelsystem gehört ein mit dem Federspeicher 12 verbundener Treibhebel 25 mit einem Mitnehmer 26 und eine Freilaufkulisse 27, die ebenso wie der Treibhebel 25 um einen ortsfesten Lagerbolzen 30 schwenkbar ist. Die Freilaufkulisse 27 trägt ein Anschlagstück 31, das mit einem ortsfesten Anschlag 32 zusammenwirkt. Die Freilaufkulisse 27 steht über zwei weitere Kniehebel 33 und 34 mit dem Gelenk 11 in Verbindung, wobei das Gelenk 35 zwischen den Kniehebeln 33 und 34 über einen Stützhebel 36 an einer Ausschalthilfsklinke 37 abgestützt ist. Diese liegt in der dargestellten Stellung des Hebelsystems an einem Rollenhebel 40 einer Ausschalthauptklinke 41 an, die von einer Ausschalthablwelle 42 gehalten ist.Another, spatially roughly parallel to the parts mentioned arranged lever system connects the spring 12 with the joint 11 between the toggle levers 5 and 6. About this Lever system is one connected to the spring 12 Driving lever 25 with a driver 26 and a free-wheeling link 27, as well as the drive lever 25 around a stationary Bearing pin 30 is pivotable. The freewheel link 27 carries a stop piece 31 with a fixed stop 32nd cooperates. The freewheel link 27 is above two more Toggle 33 and 34 in connection with the joint 11, wherein the joint 35 between the toggle levers 33 and 34 via a Support lever 36 supported on an auxiliary switch pawl 37 is. This is in the position shown Lever system on a roller lever 40 one Switch-off main pawl 41 by a switch-off output shaft 42 is held.

Die in der Figur 2 gezeigte Vorrichtung ist einer Spannwelle 45 der Kurvenscheibe 13 zugeordnet und weist einen auf der Spannwelle sitzenden Handhebel 46 zum schrittweisen Spannen des Federspeichers 12 mittels eines Klinkenrades 47 auf. Das Klinkenrad 47 ist mit der Spannwelle 45 starr gekuppelt. Mit einem Zahn 48 des Klinkenrades 47 steht eine an dem Handhebel 46 angelenkte und mit einer Andruckfeder 51 versehene Transportklinke 50 im Eingriff. Der Transportklinke 50 etwa gegenüberliegend ist eine ortsfest gelagerte Sperrklinke 52 angeordnet, die gleichfalls unter dem Einfluß einer Andruckfeder 53 im Eingriff mit einem Zahn 48 des Klinkenrades 47 steht. Um ein weiteres ortsfestes Lager 54 sind ein Anschlaghebel 55 sowie ein Entkupplungshebel 56 schwenkbar gelagert. Der Entkupplungshebel 56 besitzt eine Anschlagfläche 57 für den Anschlaghebel 55, wobei eine Zugfeder 60 den Anschlaghebel 55 und den Entkupplungshebel 56 gegeneinander vorspannt. Mit einer Öffnung 59 übergreift der Entkupplungshebel 56 die Spannwelle 45. Der Anschlaghebel 55 ist mit einer Arbeitsfläche 66 versehen, die in der dargestellten Lage der Teile einem Mitnehmer 61 gegenübersteht, der an der Kurvenscheibe 13 angebracht ist. Ferner besitzt der Entkupplungshebel 56 eine Arbeitsfläche 62 zur Beaufschlagung der Transportklinke 50. Die rückspringende Kante 63 der Kurvenscheibe 13 weist einen Vorsprung 64 auf, der in den Weg der Rolle 17 ragt, wenn diese aus der gespannten Endstellung in Richtung eines Pfeiles 65 in die Nähe der Spannwelle 45 übertritt.The device shown in Figure 2 is a tension shaft 45 assigned to the cam 13 and has one on the Clamping shaft seated hand lever 46 for gradual clamping of the spring accumulator 12 by means of a ratchet wheel 47. The Pawl 47 is rigidly coupled to the tension shaft 45. With a tooth 48 of the ratchet wheel 47 is one on the hand lever 46 hinged and provided with a pressure spring 51 Transport pawl 50 engaged. The transport pawl 50, for example a pawl 52 is mounted on the opposite side arranged, which is also under the influence of a pressure spring 53 in engagement with a tooth 48 of the ratchet wheel 47 stands. Around a further fixed bearing 54 are a stop lever 55 and a decoupling lever 56 pivotable stored. The decoupling lever 56 has a stop surface 57 for the stop lever 55, a tension spring 60 the stop lever 55 and the decoupling lever 56 biased against each other. With an opening 59 overlaps Decoupling lever 56, the tensioning shaft 45. The stop lever 55 is provided with a work surface 66 which is shown in FIG The position of the parts faces a driver 61, which is attached to the cam 13. Also owns the decoupling lever 56 a work surface 62 for Actuation of the transport pawl 50. The recessed Edge 63 of cam 13 has a projection 64, which protrudes in the way of the roller 17 when it comes out of the cocked end position in the direction of an arrow 65 in the Near the tension shaft 45.

In der Stellung gemäß der Figur 2 ist die Einschaltverklinkung bereits wirksam, die Endstellung der Kurvenscheibe jedoch noch nicht erreicht. Bei einer geringen Weiterdrehung der Kurvenscheibe 13 im Uhrzeigersinn stößt der Mitnehmer 61 gegen die Arbeitsfläche 66 des Anschlaghebels 55 und spannt hierdurch den Entkupplungshebel 56 aufgrund der Kupplung durch die Zugfeder 60 derart vor, daß die Arbeitsfläche 62 die Transportklinke 50 an einem Zapfen 58 erfaßt und diese aus der Verzahnung des Klinkenrades 47 aushebt, sobald die nachlassende Reibung zwischen der Transportklinke 50 und dem Zahn 48 dies erlaubt. Hierdurch ist der Handhebel 46 von dem Klinkenrad 47 entkuppelt.In the position shown in Figure 2 is the latch already effective, the end position of the cam however not yet reached. With a little further rotation the cam disk 13 abuts the driver 61 against the working surface 66 of the stop lever 55 and clamps this causes the decoupling lever 56 due to the clutch by the tension spring 60 in such a way that the working surface 62nd the transport pawl 50 detects on a pin 58 and this from the toothing of the ratchet wheel 47 as soon as the decreasing friction between the transport pawl 50 and the Tooth 48 allows this. As a result, the hand lever 46 of the Pawl wheel 47 disengaged.

Wird anschließend der Leistungsschalter eingeschaltet, so tritt die Rolle 17 in der Richtung des Pfeiles 65 in die entspannte Stellung nahe dem Zentrum der Anordnung, das heißt in Richtung der Spannwelle 45 über. Hierbei trifft die Rolle 17 auf den Vorsprung 64 der rückspringenden Kante 63 und drückt den Mitnehmer 61 an der Arbeitsfläche 66 derart vorbei, daß der Anschlaghebel 55 und damit der Entkupplungshebel 56 in ihre Ausgangsstellung zurückgelangen. Damit wird die Transportklinke 50 wieder frei und kann unter dem Einfluß der Andruckfeder 51 wieder in die Verzahnung des Klinkenrades 47 eingreifen.If the circuit breaker is then switched on, so enters the roller 17 in the direction of arrow 65 in the relaxed position near the center of the arrangement, that is in the direction of the tension shaft 45. This is where the role comes in 17 on the projection 64 of the recessed edge 63 and presses the driver 61 on the work surface 66 in this way over that the stop lever 55 and thus the decoupling lever 56 return to their starting position. So that will the transport pawl 50 is free again and can be influenced the pressure spring 51 back into the toothing of the ratchet wheel 47 intervene.

Eine zahnartige Ausnehmung 65 in einem der Zähne des Klinkenrades 47 sorgt dafür, daß im letzten Abschnitt des Spannvorganges des Federspeichers 12 (Fig. 1) die Spannwelle 45 nicht um einen der vollen Teilung der Zähne 48 des Klinkenrades 47 entsprechenden Winkel zurückgedreht werden kann, wenn der Spannhub mit dem Handhebel 46 nicht vollständig ausgeführt wird. Durch die Ausnehmung 65 wird die Spannwelle 45 in einer Stellung festgehalten, in welcher die Verklinkung an der Einschalthalbwelle 21 (Figur 1) bereits wirksam, die Endstellung der Kurvenscheibe 13 und damit die Entkupplung des Handhebels 46 jedoch noch nicht erreicht ist. Dies geschieht beim folgenden bzw. weiteren Hub des Handhebels 46, sofern nicht durch eine vollständige Bewegung des Handhebels 46 die Ausnehmung 65 übersprungen worden ist.A tooth-like recess 65 in one of the teeth of the Klinkenrades 47 ensures that in the last section of the Clamping process of the spring accumulator 12 (Fig. 1) the clamping shaft 45 not one of the full pitch of the teeth 48 of the Pawl wheel 47 are turned back corresponding angle can, if the clamping stroke with the hand lever 46 is not is fully executed. Through the recess 65 Tension shaft 45 held in a position in which the Latch on the switch-on half-shaft 21 (FIG. 1) already effective, the end position of the cam 13 and thus the Disengagement of the hand lever 46 has not yet been reached. This happens during the following or further stroke of the hand lever 46, unless by a complete movement of the Hand lever 46, the recess 65 has been skipped.

Claims (4)

  1. Tensioner for a spring-loading device (12) of a power circuit-breaker, having
    a pivotably mounted hand lever (46),
    a ratchet wheel (47), which can be rotated in steps by means of a movement pawl (50) which is connected to the hand lever (46) and can be blocked so that it cannot rotate back again by means of a blocking pawl (52),
    a cam disc (13), which is coupled to the ratchet wheel (47), for actuating a lever system (14,15), which is connected to the spring-loading device (12), has a toggle joint (16) and can be moved out of the completely tensioned position, along a receding edge (63) of the cam disc (13), into the initial position,
    characterized in that
    the toggle joint (16) of the lever system (14,15) interacts with the cam disc (13),
    a device for interrupting the transmission of energy from the hand lever (46) to the ratchet wheel (47), when the spring-loading device (12) is completely tensioned, is provided,
    the device having a projection (64), which is arranged on the receding edge (63) of the cam disc (13) and protrudes into the path of the toggle joint (16) of the lever system (14,15), and
    a catch (61), which is arranged on the cam disc (13) and is arranged so that it interacts with a working surface (66) of a stop lever (55) in such a manner that, when the completely tensioned position is reached, the movement pawl (50) can be lifted off the ratchet wheel (47) by the action of the stop lever, via the catch (61) and furthermore, when the projection (64) on the cam disc (13) is acted on by the toggle joint (16) while the lever system (14,15) is being transferred into the initial position, the stop lever (55) can be released, by the catch (61) continuing to move away from the working surface (66), so that the movement pawl (50) can again engage in the ratchet wheel (47).
  2. Tensioner according to Claim 1, characterized in that the device for uncoupling the hand lever (46) comprises an uncoupling lever (56) which is connected, with the interposition of a coupling spring (60), to the immovably mounted stop lever (55) and has a working surface (62) which interacts with the movement pawl (50) in such a manner that the movement pawl (50) can be lifted off the ratchet wheel (47) or can be released in order to engage in the ratchet wheel (47).
  3. Tensioner according to Claim 1 or 2, characterized in that the stop lever (55) and the uncoupling lever (56) can be moved about a common pivot pin (54) and in that the uncoupling lever (56) has an opening (59) which engages over a tensioning pin (45) which supports the ratchet wheel (47).
  4. Tensioner according to one of the preceding claims, characterized in that that tooth (48) of the ratchet wheel (47) which interacts last with the blocking pawl (52) in the course of the tensioning operation of the spring-loading device (12) has on its rear a toothlike recess (65) in order to create a further latching position.
EP95915768A 1994-04-20 1995-04-10 Tensioner for a spring-loading device Expired - Lifetime EP0756749B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4416106 1994-04-20
DE4416106A DE4416106A1 (en) 1994-04-20 1994-04-20 Clamping device for a spring accumulator
PCT/DE1995/000492 WO1995029494A1 (en) 1994-04-20 1995-04-10 Tensioner for a spring-loading device

Publications (2)

Publication Number Publication Date
EP0756749A1 EP0756749A1 (en) 1997-02-05
EP0756749B1 true EP0756749B1 (en) 1998-07-01

Family

ID=6517527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95915768A Expired - Lifetime EP0756749B1 (en) 1994-04-20 1995-04-10 Tensioner for a spring-loading device

Country Status (4)

Country Link
EP (1) EP0756749B1 (en)
JP (1) JPH09512132A (en)
DE (2) DE4416106A1 (en)
WO (1) WO1995029494A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006006907A1 (en) * 2006-02-09 2007-08-16 Siemens Ag Arrangement in particular for actuating a transport pawl and tensioning device for a spring accumulator of an electrical switch with such an arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2935833A1 (en) * 2008-09-05 2010-03-12 Schneider Electric Ind Sas DEVICE FOR CONTROLLING THE OPENING AND / OR CLOSING OF CONTACTS IN AN ELECTRICAL APPARATUS
DE102013227004B4 (en) * 2013-12-20 2021-06-02 Siemens Aktiengesellschaft Electric circuit breaker
CN105374641B (en) * 2014-08-29 2017-09-05 上海良信电器股份有限公司 A kind of breaker manual energy storing device
CN113964727B (en) * 2021-11-18 2023-04-07 国网辽宁省电力有限公司检修分公司 Maintenance tool for replacing overhead optical cable of power transmission line

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3541093A1 (en) * 1985-11-18 1987-05-21 Siemens Ag DRIVING DEVICE FOR A LOW VOLTAGE CIRCUIT BREAKER WITH A Pawl

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006006907A1 (en) * 2006-02-09 2007-08-16 Siemens Ag Arrangement in particular for actuating a transport pawl and tensioning device for a spring accumulator of an electrical switch with such an arrangement
US7902472B2 (en) 2006-02-09 2011-03-08 Siemens Aktiengesellschaft Arrangement, in particular, for activating a transport pawl and clamping device for a spring energy store of an electric switch comprising such an arrangement
CN101379576B (en) * 2006-02-09 2011-04-13 西门子公司 Arrangement for activating a transport pawl and a tension device
DE112007000202B4 (en) 2006-02-09 2022-07-14 Siemens Aktiengesellschaft Arrangement in particular for actuating a transport pawl and tensioning device for a spring accumulator of an electrical switch with such an arrangement

Also Published As

Publication number Publication date
JPH09512132A (en) 1997-12-02
WO1995029494A1 (en) 1995-11-02
EP0756749A1 (en) 1997-02-05
DE4416106A1 (en) 1995-10-26
DE59502686D1 (en) 1998-08-06

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