EP0756749A1 - Tensioner for a spring-loading device - Google Patents

Tensioner for a spring-loading device

Info

Publication number
EP0756749A1
EP0756749A1 EP95915768A EP95915768A EP0756749A1 EP 0756749 A1 EP0756749 A1 EP 0756749A1 EP 95915768 A EP95915768 A EP 95915768A EP 95915768 A EP95915768 A EP 95915768A EP 0756749 A1 EP0756749 A1 EP 0756749A1
Authority
EP
European Patent Office
Prior art keywords
lever
ratchet wheel
spring
pawl
decoupling
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.)
Granted
Application number
EP95915768A
Other languages
German (de)
French (fr)
Other versions
EP0756749B1 (en
Inventor
Ludvik Godesa
Husein Hodzic
Adolf Wihan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP0756749A1 publication Critical patent/EP0756749A1/en
Application granted granted Critical
Publication of EP0756749B1 publication Critical patent/EP0756749B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 pivotably mounted hand lever, a ratchet wheel which can be rotated step by step by means of a transport pawl connected to the hand lever and can be locked against turning back by a pawl, a cam disc coupled to the ratchet wheel for actuating a spring latch connected lever system, the knee joint is movable from the fully tensioned position along a recessed edge of the cam to the starting position.
  • a tensioning device of this type has become known, for example, from EP-B-0 089 463. Proceeding from this, the object of the invention is to prevent the spring accumulator from reacting to the hand lever when switching, so that neither the operator is endangered by a switching operation of the circuit breaker nor the switching operation itself can be influenced by the operator.
  • a device for interrupting the power transmission from the hand lever to the ratchet wheel is provided when the energy storage device is fully tensioned, the device having a projection attached to the recessed edge of the cam and projecting into the path of the knee joint of the lever system and has a driver attached to the cam.
  • the device ensures that the hand lever decouples when the fully tensioned position of the spring accumulator is reached and is immediately effective again when the spring accumulator is released when the circuit breaker is switched on.
  • the device for decoupling the hand lever can comprise a stationary stop lever and a decoupling lever which is connected to the stop lever and which has a working surface which interacts with the transport pawl.
  • the clutch spring ensures that the driver can be operated regardless of the movement of the transport pawl.
  • the stop lever and the decoupling lever can be movable about a common hinge pin, the decoupling lever having an opening spanning the ratchet wheel and spanning shaft.
  • the device therefore takes up little space and is closely arranged around the shaft of the tensioning device.
  • the tooth of the ratchet wheel which last interacts with the pawl in the course of the tensioning process of the spring accumulator can have a tooth-like recess on its back to create a further latching position. This ensures that the operator is caused to carry out the tensioning process completely and, for example, not to interrupt it in a state in which the circuit breaker of the circuit breaker is already locked, but the cam disc has not yet reached its end position and the hand lever has not yet been uncoupled.
  • Figure 1 shows schematically part of a
  • FIG. 1 a device for interrupting the power transmission of a hand lever is shown.
  • the lever arrangement shown schematically in FIG. 1 serves to actuate a switch contact arrangement which has a movable contact lever 1 and a fixed counter contact 2.
  • the movable contact lever 1 is articulated on a pivotably mounted lever carrier 3 and is provided with a contact force spring 4.
  • Two toggle levers 5 and 6 connect the lever carrier 3 in an articulated manner to a switching shaft 7, which is provided together for several poles of a circuit breaker. According to the switched-off position of the lever support 3 shown, the
  • the toggle levers 5 and 6 are shown in a bent position, in which the toggle lever 6 lies against a stop 10.
  • a spring accumulator 12 is provided, which is designed as a helical compression spring.
  • a cam disk 13 in conjunction with toggle levers 14 and 15 serves to tension the spring accumulator 12, and the cam disk 13 acts on the connecting joint 16 thereof by means of a roller 17 shown in dashed lines.
  • the toggle levers 14 and 15 are almost in their extended position, as a result of which the spring accumulator 12 is tensioned ready to be switched on.
  • a support lever 20 engaging on the knee joint 16 is supported by means of a two-stage engagement latch. This includes a switch-on half-shaft 21, a pivotable switch-on main pawl 22, a roller lever 23 connected to the switch-on main pawl 22 and an auxiliary pawl 24 connected to the support lever 20.
  • Another lever system which is arranged approximately parallel to the parts mentioned, connects the spring accumulator 12 to the joint 11 between the toggle levers 5 and 6
  • Lever system is one connected to the spring 12 Driving lever 25 with a driver 26 and a free-wheel link 27, which, like the driving lever 25, can be pivoted about a fixed bearing pin 30.
  • the freewheel link 27 carries a stop piece 31 which cooperates with a fixed stop 32.
  • the free-wheeling link 27 is connected to the joint 11 via two further toggle levers 33 and 34, the joint 35 being supported on a switch-off auxiliary pawl 37 between the toggle levers 33 and 34 via a support lever 36. This lies in the position of the lever system shown on a roller lever 40
  • Switch-off main pawl 41 which is held by a switch-off output shaft 42.
  • the device shown in FIG. 2 is assigned to a tensioning shaft 45 of the cam disk 13 and has a hand lever 46 seated on the tensioning shaft for stepwise tensioning of the spring accumulator 12 by means of a ratchet wheel 47.
  • the ratchet wheel 47 is rigidly coupled to the tension shaft 45.
  • With a tooth 48 of the ratchet wheel 47 is a hinged to the hand lever 46 and provided with a pressure spring 51
  • Transport pawl 50 engaged.
  • a transport pawl 52 is arranged approximately opposite the transport pawl, which is likewise under the influence of a pressure spring 53 in engagement with a tooth 48 of the ratchet wheel 47.
  • a stop lever 55 and a decoupling lever 56 are pivotally mounted around a further fixed bearing 54.
  • the decoupling lever 56 has a stop surface 57 for the stop lever 55, a tension spring 60 biasing the stop lever 55 and the decoupling lever 56 against each other.
  • the decoupling lever 56 overlaps the tensioning shaft 45 with an opening 59.
  • the stop lever 55 is provided with a working surface 66 which, in the illustrated position of the parts, faces a driver 61 which is attached to the cam disk 13.
  • the decoupling lever 56 also has a working surface 62
  • the recessed Edge 63 of the cam disk 13 has a projection 64 which projects into the path of the roller 17 when it passes from the tensioned end position in the direction of an arrow 65 in the vicinity of the tensioning shaft 45.
  • the closing latch is already effective, but the end position of the cam disk has not yet been reached.
  • the driver 61 abuts against the working surface 66 of the stop lever 55 and thereby tensions the decoupling lever 56 due to the coupling by the tension spring 60 in such a way that the working surface 62 grasps the transport pawl 50 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.
  • the hand lever 46 is uncoupled from the ratchet wheel 47.
  • the roller 17 moves in the direction of the arrow 65 into the relaxed position near the center of the arrangement, that is to say in the direction of the tensioning shaft 45.
  • the roller 17 meets the projection 64 of the recessed edge 63 and presses the driver 61 past the work surface 66 in such a way that the stop lever 55 and thus the decoupling lever 56 return to their starting position.
  • the transport pawl 50 is free again and can engage again under the influence of the pressure spring 51 in the teeth of the ratchet wheel 47.
  • a tooth-like recess 65 in one of the teeth of the ratchet wheel 47 ensures that in the last section of the tensioning process of the spring accumulator 12 (FIG. 1) the tensioning shaft 45 cannot be turned back by an angle corresponding to the full pitch of the teeth 48 of the ratchet wheel 47 if the clamping stroke with the hand lever 46 is not is fully executed.
  • the tensioning shaft 45 is held in a position in which the latching on the switch-on half shaft 21 (FIG. 1) is already effective, but the end position of the cam disk 13 and thus the decoupling of the hand lever 46 has not yet been reached. This occurs during the subsequent or further stroke of the hand lever 46, unless the recess 65 has not been skipped by a complete movement of the hand lever 46.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

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

BesehreibungDescription
Spannvorrichtung für einen FederspeicherClamping device for a spring accumulator
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 Hebelsystems, dessen Kniegelenk 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 pivotably mounted hand lever, a ratchet wheel which can be rotated step by step by means of a transport pawl connected to the hand lever and can be locked against turning back by a pawl, a cam disc coupled to the ratchet wheel for actuating a spring latch connected lever system, the knee joint is movable from the fully tensioned position along a recessed edge of the cam 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 has become known, for example, from EP-B-0 089 463. Proceeding from this, the object of the invention is to prevent the spring accumulator from reacting to the hand lever when switching, so that neither the operator is endangered by a switching operation of the circuit breaker nor the switching operation itself can be influenced by the operator.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß eine Vorrichtung zur Unterbrechung der Kraftübertragung von dem Handhebel zu dem Klinkenrad bei vollständig gespanntem Energiespeicher 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. 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. Die Vorrichtung zur Entkupplung des Handhebels kann einen ortsfest gelagerten Anschlaghebel und einen unter Einfügung einer Kupplungsfeder mit dem Anschlaghebel verbundenen Entkupplungshebel umfassen, der eine mit der Transportklinke zusammenwirkende Arbeitsfläche besitzt. Die Kupplungsfeder sorgt dafür, daß der Mitnehmer unabhängig von der Bewegung der Transportklinke betätigt werden kann.This object is achieved according to the invention in that a device for interrupting the power transmission from the hand lever to the ratchet wheel is provided when the energy storage device is fully tensioned, the device having a projection attached to the recessed edge of the cam and projecting into the path of the knee joint of the lever system and has a driver attached to the cam. The device ensures that the hand lever decouples when the fully tensioned position of the spring accumulator is reached and is immediately effective again when the spring accumulator is released when the circuit breaker is switched on. The device for decoupling the hand lever can comprise a stationary stop lever and a decoupling lever which is connected to the stop lever and which has a working surface which interacts with the transport pawl. The clutch spring ensures that the driver can be operated regardless of the movement of the transport pawl.
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 be movable about a common hinge pin, the decoupling lever having an opening spanning the ratchet wheel and spanning shaft. The device therefore takes up little space and is closely arranged around the shaft of the tensioning device.
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 tooth of the ratchet wheel which last interacts with the pawl in the course of the tensioning process of the spring accumulator can have a tooth-like recess on its back to create a further latching position. This ensures that the operator is caused to carry out the tensioning process completely and, for example, not to interrupt it in a state in which the circuit breaker of the circuit breaker is already locked, but the cam disc has not yet reached its end position and the hand lever has not yet been uncoupled.
Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert. Die Figur 1 zeigt schematisch einen Teil einerThe invention is explained below with reference to the embodiment shown in the figures. Figure 1 shows schematically part of a
Antriebsvorrichtung für einen Niederspannungs- Leistungsschalter, in der Figur 2 ist eine Vorrichtung zur Unterbrechung der Kraftübertragung eines Handhebels gezeigt. 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 l 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 dieDrive device for a low-voltage circuit breaker, in Figure 2, a device for interrupting the power transmission of a hand lever is shown. The lever arrangement shown schematically in FIG. 1 serves to actuate a switch contact arrangement which has a movable contact lever 1 and a fixed counter contact 2. The movable contact lever 1 is articulated on a pivotably mounted lever carrier 3 and is provided with a contact force spring 4. Two toggle levers 5 and 6 connect the lever carrier 3 in an articulated manner to a switching shaft 7, which is provided together for several poles of a circuit breaker. According to the switched-off position of the lever support 3 shown, the
Kniehebel 5 und 6 in einer eingeknickten Stellung gezeigt, in welcher der Kniehebel 6 an einem Anschlag 10 anliegt.The toggle levers 5 and 6 are shown in a bent position, in which the toggle lever 6 lies against a stop 10.
An einem Kniegelenk 11 zwischen den Kniehebeln 5 und 6 greifen weitere Hebel an, die für alle Pole einesOn a knee joint 11 between the toggle levers 5 and 6, further levers engage, one for all poles
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.Circuit breakers are common and have the task of providing the total actuation energy required. For this purpose, a spring accumulator 12 is provided, which is designed as a helical compression spring. A cam disk 13 in conjunction with toggle levers 14 and 15 serves to tension the spring accumulator 12, and the cam disk 13 acts on the connecting joint 16 thereof by means of a roller 17 shown in dashed lines. In the position according to FIG. 1, the toggle levers 14 and 15 are almost in their extended position, as a result of which the spring accumulator 12 is tensioned ready to be switched on. A support lever 20 engaging on the knee joint 16 is supported by means of a two-stage engagement latch. This includes a switch-on half-shaft 21, a pivotable switch-on main pawl 22, a roller lever 23 connected to the switch-on main pawl 22 and an auxiliary pawl 24 connected to the support lever 20.
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 diesemAnother lever system, which is arranged approximately parallel to the parts mentioned, connects the spring accumulator 12 to the joint 11 between the toggle levers 5 and 6
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 einerLever system is one connected to the spring 12 Driving lever 25 with a driver 26 and a free-wheel link 27, which, like the driving lever 25, can be pivoted about a fixed bearing pin 30. The freewheel link 27 carries a stop piece 31 which cooperates with a fixed stop 32. The free-wheeling link 27 is connected to the joint 11 via two further toggle levers 33 and 34, the joint 35 being supported on a switch-off auxiliary pawl 37 between the toggle levers 33 and 34 via a support lever 36. This lies in the position of the lever system shown on a roller lever 40
Ausschalthauptklinke 41 an, die von einer Ausschalthablwelle 42 gehalten ist.Switch-off main pawl 41, which is held by a switch-off output shaft 42.
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 verseheneThe device shown in FIG. 2 is assigned to a tensioning shaft 45 of the cam disk 13 and has a hand lever 46 seated on the tensioning shaft for stepwise tensioning of the spring accumulator 12 by means of a ratchet wheel 47. The ratchet wheel 47 is rigidly coupled to the tension shaft 45. With a tooth 48 of the ratchet wheel 47 is a hinged to the hand lever 46 and provided with a pressure spring 51
Transportklinke 50 im Eingriff. Der Transportklinke 50 etwa gegenüberliegend ist eine ortsfest gelagerte Sperrklinke 52 angeordnet, die gleichfalls unter dem Einfluß einer Andruck¬ feder 53 im Eingriff mit einem Zahn 48 des Klinkenrades 47 steht. Um ein weiteres ortsfestes Lager 54 sind ein An¬ schlaghebel 55 sowie ein Entkupplungshebel 56 schwenkbar gelagert. Der Entkupplungshebel 56 besitzt eine Anschlag¬ fläche 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 darge¬ stellten Lage der Teile einem Mitnehmer 61 gegenübersteht, der an der Kurvenscheibe 13 angebracht ist. Ferner besitzt der Entkupplungshebel 56 eine Arbeitsfläche 62 zurTransport pawl 50 engaged. A transport pawl 52 is arranged approximately opposite the transport pawl, which is likewise under the influence of a pressure spring 53 in engagement with a tooth 48 of the ratchet wheel 47. A stop lever 55 and a decoupling lever 56 are pivotally mounted around a further fixed bearing 54. The decoupling lever 56 has a stop surface 57 for the stop lever 55, a tension spring 60 biasing the stop lever 55 and the decoupling lever 56 against each other. The decoupling lever 56 overlaps the tensioning shaft 45 with an opening 59. The stop lever 55 is provided with a working surface 66 which, in the illustrated position of the parts, faces a driver 61 which is attached to the cam disk 13. The decoupling lever 56 also has a working surface 62
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.Actuation of the transport pawl 50. The recessed Edge 63 of the cam disk 13 has a projection 64 which projects into the path of the roller 17 when it passes from the tensioned end position in the direction of an arrow 65 in the vicinity of the tensioning shaft 45.
In der Stellung gemäß der Figur 2 ist die Einschaltver- klinkung 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 according to FIG. 2, the closing latch is already effective, but the end position of the cam disk has not yet been reached. With a slight further rotation of the cam 13 in the clockwise direction, the driver 61 abuts against the working surface 66 of the stop lever 55 and thereby tensions the decoupling lever 56 due to the coupling by the tension spring 60 in such a way that the working surface 62 grasps the transport pawl 50 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 is uncoupled from the ratchet wheel 47.
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 Entkupplungs¬ hebel 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, the roller 17 moves in the direction of the arrow 65 into the relaxed position near the center of the arrangement, that is to say in the direction of the tensioning shaft 45. Here, the roller 17 meets the projection 64 of the recessed edge 63 and presses the driver 61 past the work surface 66 in such a way that the stop lever 55 and thus the decoupling lever 56 return to their starting position. Thus, the transport pawl 50 is free again and can engage again under the influence of the pressure spring 51 in the teeth of the ratchet wheel 47.
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 l) 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 Hand¬ hebels 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 ratchet wheel 47 ensures that in the last section of the tensioning process of the spring accumulator 12 (FIG. 1) the tensioning shaft 45 cannot be turned back by an angle corresponding to the full pitch of the teeth 48 of the ratchet wheel 47 if the clamping stroke with the hand lever 46 is not is fully executed. Through the recess 65, the tensioning shaft 45 is held in a position in which the latching on the switch-on half shaft 21 (FIG. 1) is already effective, but the end position of the cam disk 13 and thus the decoupling of the hand lever 46 has not yet been reached. This occurs during the subsequent or further stroke of the hand lever 46, unless the recess 65 has not been skipped by a complete movement of the hand lever 46.

Claims

Patentansprüche Claims
1. Spannvorrichtung für einen Federspeicher (12) eines Leistungsschalters mit - einem schwenkbar gelagerten Handhebel (46) , einem Klinkenrad (47) , das durch eine mit dem Handhebel (46) verbundene Transportklinke (50) schrittweise drehbar und durch eine Sperrklinke (52) gegen Zurückdrehen sperrbar ist, - eine mit dem Klinkenrad (47) gekuppelte Kurvenscheibe (13) zur Betätigung eines mit dem Federspeicher (12) verbundenen Hebelsystems (14,15) dessen Kniegelenk ((16) aus der vollständig gespannten Stellung entlang einer rückspringenden Kante (63) der Kurvenscheibe (13) in die Ausgangsstellung bewegbar ist, d a d u r c h g e k e n n z e i c h n e t , daß eine Vorrichtung zur Unterbrechung der Kraftübertragung von dem Handhebel (46) zu dem Klinkenrad (47) bei vollständig gespanntem Energiespeicher (12) vorgesehen ist, die einen an der rückspringenden Kante (63) der Kurvenscheibe (13) angebrachten, in den Weg des Kniegelenkes (16) des Hebelsystems (14,15) ragenden Vorsprung (64) und - einen an der Kurvenscheibe (13) angebrachten Mitnehmer (61) aufweist.1. Clamping device for a spring accumulator (12) of a circuit breaker with - a pivoted hand lever (46), a ratchet wheel (47) which can be rotated step by step by means of a transport pawl (50) connected to the hand lever (46) and by means of a pawl (52) is lockable against turning back, - a cam disc (13) coupled to the ratchet wheel (47) for actuating a lever system (14, 15) connected to the spring accumulator (12), the knee joint ((16) of which from the fully tensioned position along a recessed edge ( 63) of the cam disc (13) can be moved into the starting position, characterized in that a device for interrupting the transmission of force from the hand lever (46) to the ratchet wheel (47) is provided when the energy store (12) is fully tensioned, one on the recessed edge (63) of the cam (13) attached, in the way of the knee joint (16) of the lever system (14, 15) protruding projection (64) u nd - has a driver (61) attached to the cam disc (13).
2. Spannvorrichtung 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 die Vorrichtung zur Entkupplung des Handhebels (46) einen ortsfest gelagerten Anschlaghebel (55) und einen unter Einfügung einer Kupplungsfeder (60) mit dem Anschlaghebel (55) verbundenen Entkupplungshebel (56) umfaßt, der eine mit der Transportklinke (50) zusammenwirkende Arbeitsfläche (62) besitzt. 2. Clamping device according to claim 1, characterized in that the device for decoupling the hand lever (46) a stationary stop lever (55) and a coupling spring (60) with the stop lever (55) connected to the decoupling lever (56), which comprises a has working surface (62) interacting with the transport pawl (50).
3. Spannvorrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der Anschlaghebel (55) und der Entkupplungshebel (56) um einen gemeinsamen Gelenkzapfen (54) bewegbar sind und daß der Entkupplungshebel (56) eine das Klinkenrad (47) tragende Spannwelle (45) übergreifende Öffnung (59) besitzt.3. Clamping device according to claim 1 or 2, characterized in that the stop lever (55) and the decoupling lever (56) are movable about a common hinge pin (54) and that the decoupling lever (56) carries a ratchet wheel (47) tensioning shaft (45) overlapping opening (59).
4. Spannvorrichtung nach einem der vorangehenden Ansprüche d a d u r c h g e k e n n z e i c h n e t , daß der im Zuge des Spannvorganges des Federspeichers (12) zuletzt mit der Sperrklinke (52) zusammenwirkende Zahn (48) des Klinkenrades (47) an seinem Rücken zur Schaffung einer weiteren RastStellung eine zahnartige Ausnehmung (65) besitzt. 4. Clamping device according to one of the preceding claims, characterized in that the tooth (48) of the ratchet wheel (47) interacting last with the pawl (52) in the course of the clamping process of the spring accumulator (12) on its back to create a further latching position, a tooth-like recess ( 65).
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 true EP0756749A1 (en) 1997-02-05
EP0756749B1 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
US9953788B2 (en) 2013-12-20 2018-04-24 Siemens Aktiengsellschaft Electric circuit breaker

Families Citing this family (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
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
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

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* 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9529494A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9953788B2 (en) 2013-12-20 2018-04-24 Siemens Aktiengsellschaft Electric circuit breaker

Also Published As

Publication number Publication date
JPH09512132A (en) 1997-12-02
DE59502686D1 (en) 1998-08-06
WO1995029494A1 (en) 1995-11-02
DE4416106A1 (en) 1995-10-26
EP0756749B1 (en) 1998-07-01

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