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EP0038288A1 - Mechanical drive for direct on and off switching of a low-voltage protective switch - Google Patents

Mechanical drive for direct on and off switching of a low-voltage protective switch Download PDF

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Publication number
EP0038288A1
EP0038288A1 EP81730036A EP81730036A EP0038288A1 EP 0038288 A1 EP0038288 A1 EP 0038288A1 EP 81730036 A EP81730036 A EP 81730036A EP 81730036 A EP81730036 A EP 81730036A EP 0038288 A1 EP0038288 A1 EP 0038288A1
Authority
EP
European Patent Office
Prior art keywords
power drive
rotary handle
shaft
low
protective switch
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
EP81730036A
Other languages
German (de)
French (fr)
Other versions
EP0038288B1 (en
Inventor
Werner Troebel
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0038288A1 publication Critical patent/EP0038288A1/en
Application granted granted Critical
Publication of EP0038288B1 publication Critical patent/EP0038288B1/en
Expired legal-status Critical Current

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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
    • H01H71/66—Power reset mechanisms
    • H01H71/70—Power reset mechanisms actuated by electric motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H2003/028—Rotating knob or lever or tumbler that can be turned or pushed by hand in only one direction, e.g. by making inaccessible one side of a tumbler
    • 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
    • H01H71/66—Power reset mechanisms
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position
    • 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
    • H01H3/227—Interlocked hand- and power-operating mechanisms

Definitions

  • the invention relates to a power drive for a device, in particular a low-voltage circuit breaker, with a rotary handle for manual operation.
  • the main purpose of the twist grip is to enable the device to be operated if the power drive fails for any reason, e.g. B. because the power supply to operate an electric motor has failed or compressed air or another medium is temporarily not available.
  • a twist grip of the type mentioned is z. B .. provided in a motor drive for electrical switching devices according to US-PS 31 71 920.
  • it is only intended to be used for manual actuation in order to bring a linearly displaceable carriage into a specific position in which it can be brought into engagement with the actuating handle of an electrical switching device.
  • the rotary handle is attached to the motor shaft. If the electrical switching device is to be switched on and off when the power supply to the electric motor of the power drive fails, the entire power drive is folded down by the electrical switching device in order to make its actuating handle accessible.
  • the invention has for its object to assign the rotary handle to the power drive so that it allows manual operation of the device even with a coupled power drive.
  • this object is achieved in that the rotary handle with a reduced speed revolving shaft of the motor drive is connected.
  • the motor drive z. B. designed so that the switching device when rotating the output shaft of a reduction gear by 180 0 passes from the switch-on position to the switch-off position or vice versa, and if the shaft is connected to the twist grip, the switchgear can also be turned manually by half a turn the rotary handle can be switched.
  • the peripheral speed of the rotary handle and thus the risk of being carried or injured is particularly low.
  • Rotary handles are particularly suitable for the present context, which, in the case of a cylindrical disk-shaped basic shape, have gripping surfaces lying on both sides of a web arranged symmetrically to an ideal diameter line, approximately parallel to the cylinder axis.
  • Fig. 1 shows a motor drive in connection with a low-voltage circuit breaker in a side view.
  • FIG. 2 shows a perspective view of a rotary handle of the motor drive.
  • a low-voltage circuit breaker 1 of the so-called compact design is shown in broken lines in its outline.
  • the circuit breaker 1 has an insulating housing 2, in which a rocker arm 4 is pivotally arranged about a pivot bearing 3.
  • the rocker arm 4 is in a manner not shown in connection with a switching mechanism which allows movable and fixed contacts to be brought into contact with one another and separated again in a known manner.
  • the circuit breaker 1 contains devices for automatic shutdown in the event of overload and short circuit.
  • the circuit breaker 1 can be designed such as this. B. is described in DE-PS 28 11 441 or DE-PS 28 17 667.
  • An actuating handle 5 is placed on the rocker arm 4 and protrudes from a central elevation 6 on the front side of the circuit breaker 1.
  • This actuating handle interacts with a motor drive, designated as a whole as 10, which is also fastened by means of screws 11 on the front side of the circuit breaker 1.
  • the main components of the motor drive 10 include a support plate 12 which is fastened to the housing 2 by means of bends or attached angle pieces 7 and the screws 11 already mentioned.
  • a slide 14 is guided in the direction of the double arrow 15 between the pressed-out tabs 13.
  • a window-like opening 16 of the slide 14 encompasses the end of the actuating handle 5 and a cylindrical body 17 with bends 18 placed thereon. This is secured against radial escape by a guide track 20.
  • a motor gear unit 21 is also attached, which consists of a motor 22 with parallel to the support plate 12 lying axis and a reduction gear 23 with perpendicular to the support plate 12 axis of rotation.
  • the output shaft 24 of the transmission 23 carries a crank arm 25 with a crank pin 26. This engages between the legs 27 of a leaf spring 30 which extends parallel to the plane of the slide 14 and transversely to its direction of movement (double arrow 15).
  • the leaf spring 30 is used for the elastic force transmission from the motor gear unit 21 to the slide 14, such that tolerance compensation is brought about in the end positions.
  • the crank arm 25 rotates by approximately 180 °.
  • Two limit switches 31 and 32 which are also fastened to the support plate 12 and whose actuating levers 33 and 34 cooperate with an extension 35 of the slide 14, ensure that the motor 22 is stopped when the circuit breaker 1 is switched on and off. All of the motor drive components mentioned are covered on the outside by a cap 36 which is provided with an opening for the passage of a rotary handle 37. This is rotatably attached to a shaft end of the output shaft 24 opposite the crank arm 25 and secured against removal by a collar 38. The rotary handle 37 is thus constantly in engagement with the reduction gear 23 and is rotated when the circuit breaker 1 is switched on and off by means of the motor drive 10.
  • the peripheral speed is relatively low, because the output shaft 24 is the most strongly reduced shaft of the motor gear unit 21 and an angle of rotation of only about 180 ° is traveled to switch the protective switch 1 on and off.
  • a schematically indicated one-way clutch 29 is inserted between the motor shaft 28 indicated by dashed lines and the gear shaft 24 such that the shaft is driven by the motor only in one direction of rotation and the motor shaft 28 is not taken along when the rotary handle 37 is actuated in the same sense. Freewheel or overrunning clutches of this type are generally known and therefore do not require any further explanation.
  • the rotary handle 37 has a central web 40 in the case of an approximately cylindrical disk-shaped form, which is arranged symmetrically to an ideal diameter line.
  • the twist grip 37 has gripping surfaces 41 and 42 as well as opposing, continuous bevels 43 and 44.
  • the diameter of the twist grip 37 and thus the length of the gripping surfaces and inclines is approximately corresponding to the lengths of the human thumb and forefinger when the position is bent Index finger selected.
  • the gripping surfaces 41 and 42 do not offer a sufficient possibility of attack due to their decreasing height. If the motor drive 10 is now surprisingly put into operation when an operator actuates the rotary handle in the manner indicated, the fingers are rejected by the bevels 43 and 44 without any risk of injury.
  • the rotary handle is connected to the most reduced shaft, namely the output shaft 24 of the transmission 23, and therefore only achieves a relatively low peripheral speed, but also the shape of the rotary handle contributes to safety.
  • the twist grip can be used not only for motor drives according to the exemplary embodiment described, but also for power drives that work with compressed air or other media.
  • the power drive can be used with devices of any type, in which the task is to provide the possibility of an emergency operation by hand in addition to the operation by the power drive.

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  • Breakers (AREA)

Abstract

1. A power drive (10) for directly switching on and off a low-voltage protective switch (1), comprising a motor (22) and a transmission (23), the drive shaft (24) of which carries a crank arm (25) which acts on the protective switch (1) at approximately 180 degrees rotation for each actuating operation, and an additional manually-operated member acting on the transmission, characterized in that the manually-operated member is a rotatable knob (37) which is rigidly coupled to the drive shaft (24) of the transmission (23) ; and that a freewheel clutch (29) is arranged between the drive shaft (24) and the remaining parts of the power drive (10).

Description

Die Erfindung betrifft einen Kraftantrieb für ein Gerät, insbesondere einen Niederspannungs-Schutzschalter, mit einem Drehgriff zur Handbetätigung. Der Drehgriff hat dabei vor allem die Aufgabe, die Betätigung des Gerätes zu ermöglichen, wenn der Kraftantrieb aus irgendeinem Grunde ausfällt, z. B. weil die Stromversorgung zum Betrieb eines Elektromotors ausgefallen ist oder Druckluft bzw. ein anderes Medium vorübergehend nicht zur Verfügung steht.The invention relates to a power drive for a device, in particular a low-voltage circuit breaker, with a rotary handle for manual operation. The main purpose of the twist grip is to enable the device to be operated if the power drive fails for any reason, e.g. B. because the power supply to operate an electric motor has failed or compressed air or another medium is temporarily not available.

Ein Drehgriff der genannten Art ist z. B.. bei einem Motorantrieb für elektrische Schaltgeräte nach der US-PS 31 71 920 vorgesehen. Er soll hierbei jedoch nur zur Handbetätigung dienen, um einen geradlinig verschiebbaren Schlitten in eine bestimmte Position zu bringen, in der er sich mit dem Betätigungshandgriff eines elektrischen Schaltgerätes in Eingriff bringen läßt. Hierzu ist der Drehgriff an der Welle des Motors angebracht. Soll das elektrische Schaltgerät bei Ausfall der Stromversorgung des Elektromotors des Kraftantriebes ein-und ausgeschaltet werden, so wird der gesamte Kraftantrieb von dem elektrischen Schaltgerät abgeklappt, um dessen Betätigungshandgriff zugänglich zu machen.A twist grip of the type mentioned is z. B .. provided in a motor drive for electrical switching devices according to US-PS 31 71 920. However, it is only intended to be used for manual actuation in order to bring a linearly displaceable carriage into a specific position in which it can be brought into engagement with the actuating handle of an electrical switching device. For this purpose, the rotary handle is attached to the motor shaft. If the electrical switching device is to be switched on and off when the power supply to the electric motor of the power drive fails, the entire power drive is folded down by the electrical switching device in order to make its actuating handle accessible.

Der Erfindung liegt die Aufgabe zugrunde, den Drehgriff dem Kraftantrieb so zuzuordnen, daß er die Handbetätigung des Gerätes auch mit gekuppeltem Kraftantrieb gestattet.The invention has for its object to assign the rotary handle to the power drive so that it allows manual operation of the device even with a coupled power drive.

Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, daß der Drehgriff mit einer mit untersetzter Drehzahl umlaufenden Welle des Motorantriebes verbunden ist. Ist nämlich der Motorantrieb z. B. so-ausgeführt, daß das Schaltgerät bei der Drehung der Abtriebswelle eines Untersetzungsgetriebes um 1800 von der Einschaltstellung in die Ausschaltstellung bzw. umgekehrt gelangt, und verbindet man mit dieser Welle den Drehgriff, so kann das Schaltgerät auch von Hand mit einer halben Drehung des Drehgriffes geschaltet werden. Außerdem ist die Umfangsgeschwindigkeit des Drehgriffes und damit eine Mitnahme- oder Verletzungsgefahr besonders gering.According to the invention, this object is achieved in that the rotary handle with a reduced speed revolving shaft of the motor drive is connected. Is namely the motor drive z. B. designed so that the switching device when rotating the output shaft of a reduction gear by 180 0 passes from the switch-on position to the switch-off position or vice versa, and if the shaft is connected to the twist grip, the switchgear can also be turned manually by half a turn the rotary handle can be switched. In addition, the peripheral speed of the rotary handle and thus the risk of being carried or injured is particularly low.

Je nach der Art des benutzten Kraftantriebes kann die Handbetätigung des anzutreibenden Gerätes durch den Bewegungswiderstand des Kraftantriebes erschwert sein. Nach einer Weiterbildung der Erfindung läßt sich diese Behinderung dadurch völlig vermeiden, daß zwischen der mit dem Drehgriff verbundenen Welle und den übrigen Teilen des Kraftantriebes eine Freilaufkupplung angeordnet ist.Depending on the type of power drive used, manual operation of the device to be driven can be made more difficult by the resistance to movement of the power drive. According to a development of the invention, this hindrance can be completely avoided by arranging a one-way clutch between the shaft connected to the rotary handle and the other parts of the power drive.

Besonders geeignet für den vorliegenden Zusammenhang sind Drehgriffe, die bei zylinderscheibenförmiger Grundform beiderseits eines symmetrisch zu einer ideellen Durchmesserlinie angeordneten Steges etwa parallel zur Zylinderachse liegende Griffflächen besitzen.Rotary handles are particularly suitable for the present context, which, in the case of a cylindrical disk-shaped basic shape, have gripping surfaces lying on both sides of a web arranged symmetrically to an ideal diameter line, approximately parallel to the cylinder axis.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.

Die Fig. 1 zeigt einen Motorantrieb in Verbindung mit einem Niederspannungs-Schutzschalter in einer Seitenansicht.Fig. 1 shows a motor drive in connection with a low-voltage circuit breaker in a side view.

Die Fig. 2 zeigt in einer perspektivischen Darstellung einen Drehgriff des Motorantriebes.2 shows a perspective view of a rotary handle of the motor drive.

In der Fig. 1 ist strichpunktiert in seinen Umrissen ein Niederspannungs-Schutzschalter 1 der sogenannten Kompaktbauart dargestellt. Der Schutzschalter 1 besitzt ein Isolierstoffgehäuse 2, in dem um ein Drehlager 3 ein Kipphebel 4 schwenkbar angeordnet ist. Der Kipphebel 4 steht in nicht näher dargestellter Weise mit einem Schaltmechanismus in Verbindung, der in bekannter Weise bewegliche und feststehende Kontakte miteinander in Berührung zu bringen und wieder zu trennen gestattet. Außerdem enthält der Schutzschalter 1 Einrichtungen zur selbsttätigen Abschaltung bei Überlast und Kurzschluß. Der Schutzschalter 1 kann dabei so ausgebildet sein, wie dies z. B. in der DE-PS 28 11 441 oder DE-PS 28 17 667 beschrieben ist.In Fig. 1, a low-voltage circuit breaker 1 of the so-called compact design is shown in broken lines in its outline. The circuit breaker 1 has an insulating housing 2, in which a rocker arm 4 is pivotally arranged about a pivot bearing 3. The rocker arm 4 is in a manner not shown in connection with a switching mechanism which allows movable and fixed contacts to be brought into contact with one another and separated again in a known manner. In addition, the circuit breaker 1 contains devices for automatic shutdown in the event of overload and short circuit. The circuit breaker 1 can be designed such as this. B. is described in DE-PS 28 11 441 or DE-PS 28 17 667.

Auf den Kipphebel 4 ist ein Betätigungshandgriff 5 aufgesetzt, der aus einer mittigen Erhebung 6 an der Frontseite des Schutzschalters 1 herausragt. Mit diesem Betätigungshandgriff wirkt ein als Ganzes mit 10 bezeichneter Motorantrieb zusammen, der mittels Schrauben 11 gleichfalls auf der Frontseite des Schutzschalters 1 befestigt ist. Zu den Hauptbestandteilen des Motorantriebes 10 gehört dabei eine Tragplatte 12, die mittels Abwinklungen oder angesetzter Winkelstücke 7 und der bereits erwähnten Schrauben 11 an dem Gehäuse 2 befestigt ist. An der der Frontseite des Schutzschalters 1 zugewandten Seite der Tragplatte ist zwischen herausgedrückten Lappen 13 ein Schieber 14 in Richtung des Doppelpfeiles 15 verschiebbar geführt. Eine fensterartige Öffnung 16 des Schiebers 14 umgreift dabei das Ende des Betätigungshandgriffes 5 sowie einen auf diesen aufgesteckten zylindrischen Körper 17 mit Abwinklungen 18. Dieser ist durch eine Führungsbahn 20 gegen radiales Entweichen gesichert.An actuating handle 5 is placed on the rocker arm 4 and protrudes from a central elevation 6 on the front side of the circuit breaker 1. This actuating handle interacts with a motor drive, designated as a whole as 10, which is also fastened by means of screws 11 on the front side of the circuit breaker 1. The main components of the motor drive 10 include a support plate 12 which is fastened to the housing 2 by means of bends or attached angle pieces 7 and the screws 11 already mentioned. On the side of the support plate facing the front of the circuit breaker 1, a slide 14 is guided in the direction of the double arrow 15 between the pressed-out tabs 13. A window-like opening 16 of the slide 14 encompasses the end of the actuating handle 5 and a cylindrical body 17 with bends 18 placed thereon. This is secured against radial escape by a guide track 20.

Auf der Tragplatte 12 ist ferner eine Motorgetriebeeinheit 21 befestigt, die aus einem Motor 22 mit parallel zu der Tragplatte 12 liegender Achse und einem Untersetzungsgetriebe 23 mit senkrecht zu der Tragplatte 12 stehender Drehachse besteht. Die Abtriebswelle 24 des Getriebes 23 trägt einen Kurbelarm 25 mit einem Kurbelzapfen 26. Dieser greift zwischen die Schenkel 27 einer Blattfeder 30 ein, die sich parallel zu der Ebene des Schiebers 14 und quer zu dessen Bewegungsrichtung (Doppelpfeil 15) erstreckt. Die Blattfeder 30 dient zur elastischen Kraftübertragung von der Motorgetriebeeinheit 21 auf den Schieber 14, derart, daß in den Endstellungen ein Toleranzausgleich herbeigeführt wird. Für jeden Betätigungsvorgang, d. h. beim Einschalten oder beim Ausschalten des Schutzschalters 1, führt der Kurbelarm 25 eine Drehung von etwa 180° aus.On the support plate 12, a motor gear unit 21 is also attached, which consists of a motor 22 with parallel to the support plate 12 lying axis and a reduction gear 23 with perpendicular to the support plate 12 axis of rotation. The output shaft 24 of the transmission 23 carries a crank arm 25 with a crank pin 26. This engages between the legs 27 of a leaf spring 30 which extends parallel to the plane of the slide 14 and transversely to its direction of movement (double arrow 15). The leaf spring 30 is used for the elastic force transmission from the motor gear unit 21 to the slide 14, such that tolerance compensation is brought about in the end positions. For each actuation process, that is to say when the circuit breaker 1 is switched on or off, the crank arm 25 rotates by approximately 180 °.

Zwei Endschalter 31 und 32, die gleichfalls auf der Tragplatte 12 befestigt sind und deren Betätigungshebel 33 und 34 mit einem Fortsatz 35 des Schiebers 14 zusammenwirken, sorgen beim Ein- und Ausschalten des Schutzschalters 1 für die Stillsetzung des Motors 22. Alle erwähnten Komponenten des Motorantriebes sind nach außen durch eine Kappe 36 abgedeckt, die mit einer Öffnung zum Durchtritt eines Drehgriffes 37 versehen ist. Dieser ist auf einen dem Kurbelarm 25 gegenüberliegenden Wellenstumpf der Abtriebswelle 24 drehschlüssig aufgesteckt und gegen Abnahme durch einen Bund 38 gesichert. Der Drehgriff 37 steht somit ständig in Eingriff mit dem Untersetzungsgetriebe 23 und wird beim Ein- und Ausschalten des Schutzschalters 1 mittels des Motorantriebes 10 mitgedreht. Die Umfangsgeschwindigkeit ist dabei relativ niedrig, weil die Abtriebswelle 24 die am stärksten untersetzte Welle der Motorgetriebeeinheit 21 ist und zum Einschalten bzw. Ausschalten des Schutzschalters 1 jeweils ein Drehwinkel von nur etwa 180° zurückgelegt wird. Ferner ist zwischen der gestrichelt angedeuteten Motorwelle 28 und der Getriebewelle 24 eine schematisch angedeutete Freilaufkupplung 29 eingefügte Diese wirkt derart, daß die Welle von dem Motor nur in einer Drehrichtung angetrieben wird und die Motorwelle 28 beim Betätigen des Drehgriffes 37 im gleichen Sinn nicht mitgenommen wird. Freilauf- oder Uberholkupplungen dieser Art sind allgemein bekannt und bedürfen daher keiner näheren Erläuterung.Two limit switches 31 and 32, which are also fastened to the support plate 12 and whose actuating levers 33 and 34 cooperate with an extension 35 of the slide 14, ensure that the motor 22 is stopped when the circuit breaker 1 is switched on and off. All of the motor drive components mentioned are covered on the outside by a cap 36 which is provided with an opening for the passage of a rotary handle 37. This is rotatably attached to a shaft end of the output shaft 24 opposite the crank arm 25 and secured against removal by a collar 38. The rotary handle 37 is thus constantly in engagement with the reduction gear 23 and is rotated when the circuit breaker 1 is switched on and off by means of the motor drive 10. The peripheral speed is relatively low, because the output shaft 24 is the most strongly reduced shaft of the motor gear unit 21 and an angle of rotation of only about 180 ° is traveled to switch the protective switch 1 on and off. Furthermore, a schematically indicated one-way clutch 29 is inserted between the motor shaft 28 indicated by dashed lines and the gear shaft 24 such that the shaft is driven by the motor only in one direction of rotation and the motor shaft 28 is not taken along when the rotary handle 37 is actuated in the same sense. Freewheel or overrunning clutches of this type are generally known and therefore do not require any further explanation.

Die Gestaltung des Drehgriffes 37 ist der Fig. 2 zu entnehmen. Wie man erkennt, besitzt der Drehgriff bei etwa zylinderscheibenförmiger Grundform einen mittleren Steg 40, der symmetrisch zu einer ideellen Durchmesserlinie angeordnet ist. Zu beiden Seiten des Steges besitzt der Drehgriff 37 Griffflächen 41 und 42 sowie gegenläufige, durchgehende Schrägen 43 und 44. Der Durchmesser des Drehgriffes 37 und somit die Länge der Griffflächen und Schrägen ist etwa entsprechend den Längen des menschlichen Daumens und des Zeigefingers bei eingeknickter Stellung des Zeigefingers gewählt. Beim Aufliegen des Daumens auf der Schräge 43 und des abgeknickten Zeigefingers auf der Grifffläche 44 läßt sich in den Drehgriff 37 nur im Uhrzeigersinn ein Drehmoment einleiten. In der umgekehrten Drehrichtung bieten die Griffflächen 41 und 42 infolge ihrer abnehmenden Höhe keine ausreichende Angriffsmöglichkeit. Wird nun der Motorantrieb 10 überraschend in Betrieb gesetzt, wenn eine Bedienungsperson in der angegebenen Weise den Drehgriff betätigt, so werden die Finger von den Schrägen 43 und 44 ohne jede Verletzungsgefahr abgewiesen. Zur Sicherheit trägt dabei nicht nur der Umstand bei, daß der Drehgriff mit der am stärksten untersetzten Welle, nämlich der Abtriebswelle 24 des Getriebes 23, verbunden ist und daher nur eine relativ geringe Umfangsgeschwindigkeit erreicht, sondern auch die Form des Drehgriffes. Bei niedriger Umfangsgeschwindigkeit des Drehgriffes kann es völlig ausreichend sein, wann der Drehgriff beiderseits des Steges 40 durchgehende Griffflächen aufweist, da he ohne Schrägen ausgeführt ist.The design of the rotary handle 37 can be seen in FIG. 2. As can be seen, the rotary handle has a central web 40 in the case of an approximately cylindrical disk-shaped form, which is arranged symmetrically to an ideal diameter line. On both sides of the web, the twist grip 37 has gripping surfaces 41 and 42 as well as opposing, continuous bevels 43 and 44. The diameter of the twist grip 37 and thus the length of the gripping surfaces and inclines is approximately corresponding to the lengths of the human thumb and forefinger when the position is bent Index finger selected. When the thumb rests on the bevel 43 and the bent index finger on the grip surface 44, a torque can only be introduced clockwise into the rotary handle 37. In the opposite direction of rotation, the gripping surfaces 41 and 42 do not offer a sufficient possibility of attack due to their decreasing height. If the motor drive 10 is now surprisingly put into operation when an operator actuates the rotary handle in the manner indicated, the fingers are rejected by the bevels 43 and 44 without any risk of injury. For safety, not only the fact that the rotary handle is connected to the most reduced shaft, namely the output shaft 24 of the transmission 23, and therefore only achieves a relatively low peripheral speed, but also the shape of the rotary handle contributes to safety. At low peripheral velocity of the rotary handle, it may be quite sufficient when the rotary handle 40 having continuous grip surfaces on both sides of the ridge, d a h e is carried out without bevels.

Der Drehgriff ist nicht nur bei Motorantrieben entsprechend dem beschriebenen Ausführungsbeispiel, sondern auch für Kraftantriebe verwendbar, die mit Druckluft oder anderen Medien arbeiten. Ferner kann der Kraftantrieb mit Geräten beliebiger Art verwendet werden, bei denen die Aufgabe besteht, neben der Betätigung durch den Kraftantrieb auch die Möglichkeit einer Notbetätigung von Hand vorzusehen.The twist grip can be used not only for motor drives according to the exemplary embodiment described, but also for power drives that work with compressed air or other media. Furthermore, the power drive can be used with devices of any type, in which the task is to provide the possibility of an emergency operation by hand in addition to the operation by the power drive.

Claims (4)

1. Kraftantrieb mit einem Drehgriff für ein Gerät, ins- besondere Niederspannungs-Schutzschalter, dadurch gekennzeichnet , daß der Drehgriff (37) mit einer mit untersetzter Drehzahl umlaufenden Welle (24) des Kraftantriebes (10) verbunden ist.1. Power drive with a rotary handle for a device, in particular low-voltage circuit breaker, characterized in that the rotary handle (37) is connected to a shaft (24) of the power drive (10) rotating at a reduced speed. 2. Kraftantrieb nach Anspruch 1, dadurch gekennzeichnet , daß der Drehgriff (37) mit der am stärksten untersetzten Welle (24) des Kraftantriebes (10) verbunden ist und diese mittels eines Kurbelarmes (25) auf das Gerät bei etwa 180° Drehung je Betätigungsvorgang einwirkt.2. Power drive according to claim 1, characterized in that the rotary handle (37) with the most reduced shaft (24) of the power drive (10) is connected and this by means of a crank arm (25) on the device at about 180 ° rotation per actuation acts. 3. Kraftantrieb nach Anspruch 1, dadurch gekennzeichnet , daß zwischen einer mit dem Drehgriff (37) verbundenen Welle (24) und den übrigen Teilen des Kraftantriebes (10) eine Freilaufkupplung (29) angeordnet ist.3. Power drive according to claim 1, characterized in that a one-way clutch (29) is arranged between a shaft (24) connected to the rotary handle (37) and the other parts of the power drive (10). 4. Kraftantrieb nach Anspruch 1, dadurch gekennzeichnet , daß der Drehgriff bei zylinderscheibenförmiger Grundform beiderseits eines symmetrisch zu einer ideellen Durchmesserlinie angeordneten Steges etwa parallel zu der Zylinderachse liegende Griffflächen besitzt.4. Power drive according to claim 1, characterized in that the rotary handle has a cylindrical disc-shaped basic shape on both sides of a symmetrical to an ideal diameter line arranged approximately parallel to the cylinder axis grip surfaces.
EP19810730036 1980-04-15 1981-03-19 Mechanical drive for direct on and off switching of a low-voltage protective switch Expired EP0038288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803014828 DE3014828C2 (en) 1980-04-15 1980-04-15 Power drive for a low-voltage circuit breaker
DE3014828 1980-04-15

Publications (2)

Publication Number Publication Date
EP0038288A1 true EP0038288A1 (en) 1981-10-21
EP0038288B1 EP0038288B1 (en) 1984-05-16

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ID=6100324

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Application Number Title Priority Date Filing Date
EP19810730036 Expired EP0038288B1 (en) 1980-04-15 1981-03-19 Mechanical drive for direct on and off switching of a low-voltage protective switch

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EP (1) EP0038288B1 (en)
JP (1) JPS56165239A (en)
DE (1) DE3014828C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29622485U1 (en) * 1996-12-27 1997-03-27 Heinrich Kopp Ag, 63796 Kahl Manually operated emergency switch for switching on the main contacts of a remote circuit breaker

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697390C (en) * 1938-09-06 1940-10-12 Voigt & Haeffner Akt Ges Electric switch driven by motor and by hand with a coupling between drive and switching element
GB869125A (en) * 1957-12-03 1961-05-31 Smith & Sons Ltd S Improvements in or relating to manipulating knobs for rotary elements
DE1143896B (en) * 1963-01-22 1963-02-21
US3171920A (en) * 1962-11-08 1965-03-02 Gen Electric Motor operating mechanism for use with an electric circuit breaker
DE1465237A1 (en) * 1965-11-18 1969-02-13 Bbc Brown Boveri & Cie Device for additional manual drive of a tap changer driven by a motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152561A (en) * 1977-08-23 1979-05-01 Westinghouse Electric Corp. Circuit breaker motor and handle clutch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697390C (en) * 1938-09-06 1940-10-12 Voigt & Haeffner Akt Ges Electric switch driven by motor and by hand with a coupling between drive and switching element
GB869125A (en) * 1957-12-03 1961-05-31 Smith & Sons Ltd S Improvements in or relating to manipulating knobs for rotary elements
US3171920A (en) * 1962-11-08 1965-03-02 Gen Electric Motor operating mechanism for use with an electric circuit breaker
DE1143896B (en) * 1963-01-22 1963-02-21
DE1465237A1 (en) * 1965-11-18 1969-02-13 Bbc Brown Boveri & Cie Device for additional manual drive of a tap changer driven by a motor

Also Published As

Publication number Publication date
DE3014828C2 (en) 1985-03-14
EP0038288B1 (en) 1984-05-16
JPS56165239A (en) 1981-12-18
DE3014828A1 (en) 1981-10-22

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