EP1105902A1 - Switch-operating lever unit for switches - Google Patents

Switch-operating lever unit for switches

Info

Publication number
EP1105902A1
EP1105902A1 EP99941501A EP99941501A EP1105902A1 EP 1105902 A1 EP1105902 A1 EP 1105902A1 EP 99941501 A EP99941501 A EP 99941501A EP 99941501 A EP99941501 A EP 99941501A EP 1105902 A1 EP1105902 A1 EP 1105902A1
Authority
EP
European Patent Office
Prior art keywords
shaft body
unit according
shaft unit
caps
selector shaft
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
EP99941501A
Other languages
German (de)
French (fr)
Other versions
EP1105902B1 (en
Inventor
Rolf Dieter Bauer
AEG Niederspannungstech GmbH & CO KG KRANZ Stefan
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.)
AEG Niederspannungstechnik GmbH and Co KG
Original Assignee
AEG Niederspannungstechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AEG Niederspannungstechnik GmbH and Co KG filed Critical AEG Niederspannungstechnik GmbH and Co KG
Publication of EP1105902A1 publication Critical patent/EP1105902A1/en
Application granted granted Critical
Publication of EP1105902B1 publication Critical patent/EP1105902B1/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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber

Definitions

  • the invention relates to a switching shaft unit for switches according to the preamble of claim 1.
  • the invention relates in particular to a switching shaft unit to be installed in a low-voltage switch.
  • a shift shaft unit of the generic type is known from the document EP 0 560 697 B1, the circular-cylindrical shift shaft body of which is penetrated by a diametrically extending recess.
  • this recess also accommodates a tensioning device that acts on it and is equipped with springs.
  • the switching shaft unit designed in this way is rotatably mounted in the housing of a circuit breaker by means of the cylindrical peripheral surface of the switching shaft body.
  • the object of the invention is to provide a switching shaft unit which has a longer service life and is less susceptible to short-circuit-related discharges occurring in the control room.
  • the task is to create a switching shaft unit in which on two opposite sides of the
  • Selector shaft body Caps for covering and lateral storage of the selector shaft body are attached.
  • the bearing friction caused by the function of the selector shaft unit is restricted to certain sections, which are also relatively difficult to attack due to short-circuit-induced discharges in the contact space due to their special position on the selector shaft body.
  • the contact lever can be acted upon by means of a tensioning device which is arranged essentially on the opposite sides of the selector shaft body and is covered by the caps.
  • the tensioning device is accommodated in an area protected by the caps outside the recess in the selector shaft body which receives the contact lever and is exposed to the effects of short-circuit-related discharges.
  • the caps are positively connected to the opposite sides of the selector shaft body by means of two diametrically opposed sections.
  • Such sections can be, for example, projections which are formed on the inside of the caps and can be brought into engagement with recesses provided on the opposite sides of the selector shaft body.
  • one of the depressions is expedient to design one of the depressions as a through opening provided in the selector shaft body, which can be used at the same time for receiving a pin for actuating the selector shaft unit. In this way, several can be parallel to each other arranged switching shaft units are actuated by a single rod rod which penetrates the switching shaft body.
  • the tensioning device consisting essentially of two springs is preferably accommodated in two channel-shaped depressions which extend diametrically and parallel to one another on the sides of the shift shaft body. These depressions simultaneously form engagement sections for projections correspondingly provided on the inside of the caps.
  • the orientation of the recesses should preferably be chosen so that the direction of extension of each recess closes an angle in the range from 20 ° to 70 ° with the line connecting the diametrically opposite engagement sections formed on the selector shaft body.
  • the sections provided for producing a positive connection between selector shaft body and cap comprise projections which are formed on the opposite sides of the selector shaft body and can be brought into engagement with recesses machined in the disc-shaped caps. These recesses are preferably designed as U-shaped cutouts in the disc-shaped caps, rib-shaped projections extending from the bottom sections of the U-shaped cutouts, which can be brought into engagement with corresponding slot-shaped depressions in the selector shaft body.
  • each cap preferably has two intersecting depressions on its inside facing the eternal side of the selector shaft body, so that one of these depressions is always aligned with the channel-shaped recess on the selector shaft body regardless of the mounting side of the cap.
  • each cap preferably has a bearing pin on its outside for mounting the selector shaft body, the bearing pin having a substantially smaller diameter than the diameter of the selector shaft body, which is cylindrical in itself.
  • An alternative combination solution of the object according to the invention can also be achieved by a shift shaft unit, in which the tensioning device is arranged covered outside the space receiving the contact lever in the interior of the shift shaft body or on the shift shaft body.
  • the covered arrangement of the tensioning device can in turn be achieved by detachable caps on the selector shaft body.
  • FIG. 1 shows a partial sectional view of a housing of an arc-quenching device of a low-voltage switch, in which the switching shaft unit according to the invention is installed;
  • FIG. 2 the switching shaft unit shown in FIG. 1 when the switch is switched off;
  • 3a a perspective, partially exploded view of a first embodiment of the shift shaft unit according to the invention
  • 3b a representation of the shift shaft unit in FIG. 3a in a partially assembled state
  • FIG. 4b an illustration of the shift shaft unit in FIG. 5a in a partially assembled state
  • the low-voltage switch has an arc-quenching device, which consists of a housing 11, a switching shaft unit 9 accommodated in the housing, arc chambers, current-carrying conductors 16 and other parts which improve the arc-quenching.
  • the housing 11 of the arc extinguishing device is mounted in a housing of the low-voltage switch, which is not shown in detail.
  • the switching shaft unit 9 serves to establish an electrical connection between the two current-carrying conductors 16.
  • the selector shaft unit 9 essentially consists of a cylindrical selector shaft body 2, on which an S-shaped contact lever 3 is rotatably supported by means of a bearing shaft 5 installed in this body.
  • the entire selector shaft unit 9 is rotatably mounted in a receiving section (not shown) of the housing 11, the particular type of this bearing being explained in detail in the context of the following illustration of the structural design of the selector shaft unit.
  • the switching shaft unit 9 can be actuated by means of a joint 10 in order to achieve the switched-on state shown in FIG. 1 or the switched-off state of the switch shown in FIG. 2.
  • the selector shaft unit 9 consists of a selector shaft body 2, which is rotationally symmetrical, approximately cylindrical.
  • the axis of the cylindrical shift shaft body 2 coincides with the geometric axis of the bearing axis 5, on which the contact lever 3 is pivotally mounted.
  • the contact lever 3 is received in a recess 2e which extends perpendicular to the axis of the selector shaft body 2 and passes through the selector shaft body 2 diametrically.
  • depressions 2c which extend diametrically and parallel to one another and are channel-shaped.
  • U-shaped slots 2d are provided in the wall between the central recess 2e and the bottom section of the respective recess 2c, which are provided for receiving pins 6.
  • a roller 6a is rotatably mounted approximately in the center and is slidably received in the recess 2e.
  • Spring 7 is accommodated in the channel-shaped depressions 2 c, which are hooked in on both sides at the spring pin ends on each end face of the selector shaft body 2.
  • the length of the slots 2d is dimensioned in comparison to the width of the central bearing section of the S-shaped contact lever 3 so that, regardless of the operating state of the switch, the pins 6 are under no circumstances contracted up to the stop on the bottom of the U-shaped slots 2d can.
  • Rotation of the selector shaft body 2 leads to the rollers 6a of the pins 6 rolling on the respective vertices of the S-shaped contact lever 3 and being pressed apart in the slots 2d against the force of the spring 7 which pulls the spring pins 6 together, thereby resulting in a constant Apply clamping force to the contact lever 3 counterclockwise.
  • the Heidelbergwellenkorper 2 further has a receiving opening 2b, in which a rod-shaped pin 1 is received. Diametrically opposite to the receiving opening 2b, 2 U-shaped cutouts 2a are machined on both end faces of the switching shaft body. Caps 8 are provided on both sides of the cylindrical switching shaft body 2. Each cap 8 has a circumferential, cylindrical collar section 8e and is provided on its inside with a pair of approximately diametrically extending reinforcing steps 8c and a U-shaped rib section 8a which is formed independently of these. The reinforcing ribs also serve to increase the creepage distances and clearances in the arc quenching device of the switch.
  • a recess 8 ⁇ is formed, which extends diametrically on the inside of the cap 8.
  • the caps can be positioned on the selector shaft body 2 in such a way that the recesses 8 ⁇ each lie in one plane with the slots 2d of the selector shaft body 2 and accommodate the ends of the pins 6 in stock.
  • recesses 8 ⁇ thus serve as guides for the pins 6 in their operational displacement m the slots 2d, so that a possible tilting of the pins in the slots 2d can be effectively avoided.
  • the cap 8 also has an opening formed by a cylindrical portion 8b extending on the inside of the cap.
  • the cylindrical section 8b is located diametrically opposite the protruding U-shaped rib section 8a and has an outer diameter which corresponds approximately to the inner diameter of the receiving opening 2b formed in the selector shaft body 2.
  • the line connecting the center point of the cylindrical section 8b with the center point of the U-shaped rib section 8a closes the same angle with the diametral line hypothetically drawn between the ribs 8c as the angle between the recess 2a line connecting the receiving opening 2b and the center line of the channel-shaped recess 2c. This angle is generally between 20 ° and 70 °, preferably around 65 °.
  • a pin-shaped pin 8d is provided on the outside of one of the caps 8 is on the diametrically opposite side to the opening of the cylindrical portion 8b, i.e.. H. behind the U-shaped rib section 8a.
  • the pin 8d serves as an installation safety device so that the selector shaft body 2 can be installed correctly in the housing 11 of the switch (not shown in detail).
  • Each cap 8 is provided on its outside with a journal 8f, which is used for the axial mounting of the selector shaft unit 9 in the receiving section of the switch housing 11, not shown.
  • a journal 8f On the front outer surface of each cap, two diametrically opposite openings 8g are formed, which serve to relieve the pressure on the selector shaft body 2.
  • One of the caps 8 has on its collar portion 8e a projecting portion 8h, which at the same time serves to mark the correct mounting position of the cap and the circumferential covering of the slots 2d and the rollers 6a in the selector shaft body 2.
  • the contact lever 3 When assembling the selector shaft unit 9, the contact lever 3 is first fitted into the recess 2e of the selector shaft body 2 so that the pin 5 serving as the articulated axis can be pushed from the outside through the selector shaft body 2 and a bearing opening of the contact lever 3 (not shown individually). Then the pins 6 are inserted into the slots 2d and the spring 7 is hung on both sides of the selector shaft body at the pin ends with the spring being pulled apart slightly.
  • the two caps 8 are then first pressed together on both end faces of the switching shaft body 2 until the U-shaped rib section 8a provided on the inside of the caps, the ribs 8c and the cylinder-shaped section 8b correspondingly in the U-shaped recess 2a, the channel-shaped recess 2c and the receiving opening 2b are fitted.
  • the caps 8 are preferably made of plastic, so that the provided on the inside of the caps raised portions 8a, 8c and 8a can be used under slight pressure on both sides of the shift shaft body 2 and therefore no additional means for attaching these caps to the shift shaft body are required.
  • the switching shaft unit 9 assembled in this way is then arranged in the housing 11 of the arc-quenching device in a receiving section (not shown in detail in FIG. 1) such that the bearing journals 8f extending axially on both sides of the switching shaft unit are received in corresponding contours with slide bearing sections of the receiving section can.
  • the joint 10 shown in Fig. 1 is attached to an outside of the housing 11 so that the rod-shaped pin 1 into an eye formed at the lower end of the joint 10 and an opening aligned with the eye of one of the cylindrical portions 8b of the caps 8 can be used.
  • FIGS. 4a and 4b show a further embodiment of the selector shaft unit 9 according to the invention.
  • This embodiment of the selector shaft unit differs from the first embodiment shown in FIGS. 3a and 3b essentially by the different design of the end faces of the selector shaft body and the caps.
  • the control shaft body 22 shown in FIGS. 4a and 4b has a recess 22e which extends perpendicular to the axis of the control shaft body and in which the contact lever 23 is received with the contact elements 24 and is mounted on a pin 25.
  • the enlarged cylindrical sections 26a of the pins 26 come into contact with the apex surfaces of the S-shaped contact lever 23, as is indicated in the illustration in FIG. 1, when the selector shaft body is rotated 22 counterclockwise an elastic contact pressure on the contact lever in his Exercise closed position. This mechanism was already explained in the first embodiment.
  • each end face of the switching shaft body 22 two approximately rectangular projections 22a, 22b are diametrically opposed to one another.
  • the projections 22b formed on both end faces of the selector shaft body 22 form the outlets of a bore section provided in the selector shaft body 22 for receiving a rod-shaped pin 21, while only openings 22g are formed in the diametrically opposite projections 22a.
  • a diametrically extending channel-shaped recess 22c for receiving the spring 27 is formed between the projections 22a and 22b.
  • Slit-shaped depressions 22f are formed in the end faces of the switching shaft body 22 along the opposite sides of the projections 22a, 22b.
  • Plate-shaped caps 28 made of flat material are provided on both sides of the switching shaft body 22. These caps have a substantially flat disk shape with diametrically opposed cutouts 28a, 28b which, when the caps are put on, are suitable for receiving the projections 22a, 22b formed on the end faces of the selector shaft body 22.
  • the U-shaped cutouts 28a, 28b have, in their base area, sections 28c angled to the mounting side of the caps 28 hm, which correspond to their length according to the width of the cutouts 28a, 28b, for firmly attaching the caps to the end faces of the selector shaft body 22 into the slot-shaped ones Recesses 22f are pluggable and at the same time serve to increase the creepage distances and clearances in the switch.
  • an X-shaped recess 28e is also formed, which, regardless of the end face to which the cap is to be attached, is suitable for one of the end faces of the shift shaft body to the outside in the projecting section of Take up spring 27.
  • This design of the recess 28e permits interchangeability of the caps 28 to be fitted on both sides of the selector shaft body 22.
  • the diameter of the plate-shaped caps 28 corresponds to the diameter of the cylindrical selector shaft body 22, so that the edges in the assembled state the caps 28 are aligned flush with the cylindrical peripheral surface of the selector shaft body 22.
  • each of the caps 28 there is provided a bearing journal 28f, by means of which the selector shaft unit can be rotatably mounted in a correspondingly designed bearing section of the housing 11, which is not shown in detail in FIG. 1.
  • the design of the selector shaft unit shown in detail above at the same time ensures that the selector shaft unit is mounted in the switch housing in a structurally simple manner and at the same time ensures reliable protection of the moving parts in the selector shaft body against electrical discharges in the event of rollovers.
  • the caps are designed so that they ensure a reliable connection with the Heidelbergwellenkorper. The access of the gases resulting from short circuits to the moving parts of the switch and the selector shaft unit is thereby made more difficult and improved shielding from an adjacent switch unit is ensured.
  • the removable caps can be dispensed with in order to simplify production, in that the tensioning device is accommodated outside the area of the recess 2e, 22e which receives the contact lever, but is still protected inside the switching shaft body.

Abstract

The invention relates to a switch-operating lever unit for switches, comprising a switch-operating lever body (2) on which a contact lever (3) is mounted. Caps (8) for covering and mounting the switch-operating lever body (2) are arranged at two opposite ends of said body (2). The unit can further comprise a tensioning device which can act on the contact lever and is positioned either outside the space housing the contact lever and within the switch-operating lever body or is covered and mounted on the switch-operating lever body (2).

Description

BESCHREIBUNG DESCRIPTION
SCHALTWELLENEINHEIT FÜR SCHALTERCONTROL SHAFT UNIT FOR SWITCHES
Die Erfindung bezieht sich auf eine Schaltwelleneinheit für Schalter gemäß dem Oberbegriff des Patentanspruchs 1. Die Erfindung bezieht sich insbesondere auf eine in einen Niederspannungsschalter einzubauende Schaltwelleneinheit.The invention relates to a switching shaft unit for switches according to the preamble of claim 1. The invention relates in particular to a switching shaft unit to be installed in a low-voltage switch.
Aus der Druckschrift EP 0 560 697 Bl ist eine gattungsgemaße Schaltwelleneinheit bekannt, dessen kreiszylindrisch ausgebildete Schaltwellenkorper von einer sich diametral erstreckenden Aussparung durchsetzt ist. In dieser Aussparung ist neben einem S-formigen Kontakthebel auch eine auf diesen einwirkende, mit Federn ausgestattete Spannvorrichtung aufgenommen. Die so ausgebildete Schaltwelleneinheit ist mittels der zylindrischen Umfangsflache des Schaltwellenkorpers im Gehäuse eines Leistungsschalters drehbar gelagert.A shift shaft unit of the generic type is known from the document EP 0 560 697 B1, the circular-cylindrical shift shaft body of which is penetrated by a diametrically extending recess. In addition to an S-shaped contact lever, this recess also accommodates a tensioning device that acts on it and is equipped with springs. The switching shaft unit designed in this way is rotatably mounted in the housing of a circuit breaker by means of the cylindrical peripheral surface of the switching shaft body.
Aus der weiteren Druckschrift EP 0 314 540 Bl ist eine ahnlich ausgebildete Schaltwelleneinheit bekannt, deren wesentlicher Unterschied zu der Schaltwelleneinheit gemäß der EP 0 560 697 Bl in der spezifischen Ausbildung der Spannvorrichtung besteht.From the further publication EP 0 314 540 Bl, a switching shaft unit of similar design is known, the essential difference of which from the switching shaft unit according to EP 0 560 697 Bl is the specific design of the tensioning device.
Aufgabe der Erfindung ist es, eine Schaltwelleneinheit zur Verfugung zu stellen, die eine höhere Lebensdauer aufweist und in bezug auf im Schaltraum auftretende, kurzschlußbedingte Entladungen weniger anfallig ist.The object of the invention is to provide a switching shaft unit which has a longer service life and is less susceptible to short-circuit-related discharges occurring in the control room.
Diese Aufgabe wird durch die Kombination der in den unabhängigen Ansprüchen definierten Merkmale gelost.This task is solved by the combination of the features defined in the independent claims.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteranspruchen. Eine erfindungsgemaße Losungsmoglichkeit der obengenanntenAdvantageous developments of the invention result from the subclaims. An inventive solution of the above
Aufgabe besteht darin, eine Schaltwelleneinheit zu schaffen, bei welcher auf zwei gegenüberliegenden Seiten desThe task is to create a switching shaft unit in which on two opposite sides of the
Schaltwellenkorpers Kappen zur Abdeckung und seitlicher Lagerung des Schaltwellenkorpers angebracht sind. Bei einer derartigen Konstruktion wird die durch die Funktion der Schaltwelleneinheit bedingte Lagerreibung auf bestimmte Abschnitte beschrankt, die außerdem durch ihre besondere Lage am Schaltwellenkorper von kurzschlußbedingten Entladungen im Kontaktraum relativ schwierig angreifbar sind.Selector shaft body Caps for covering and lateral storage of the selector shaft body are attached. With such a construction, the bearing friction caused by the function of the selector shaft unit is restricted to certain sections, which are also relatively difficult to attack due to short-circuit-induced discharges in the contact space due to their special position on the selector shaft body.
Bei einer Ausgestaltung der Schaltwelleneinheit ist der Kontakthebel mittels einer im wesentlichen auf den gegenüberliegenden Seiten des Schaltwellenkorpers angeordneten und von den Kappen abgedeckten Spannvorrichtung beaufschlagbar. Somit ist die Spannvorrichtung m einem von den Kappen geschützten Bereich außerhalb der den Kontakthebel aufnehmenden und der Einwirkung von kurzschlußbedingten Entladungen ausgesetzten Aussparung des Schaltwellenkorpers untergebracht. Bei einer solchen Anordnung bleiben die beweglichen Teile der Spannvorrichtung im wesentlichen geschützt, so daß die Funktion der Schaltwelleneinheit durch betriebsbedingte Einflüsse kaum beeinträchtigt wird.In one configuration of the selector shaft unit, the contact lever can be acted upon by means of a tensioning device which is arranged essentially on the opposite sides of the selector shaft body and is covered by the caps. Thus, the tensioning device is accommodated in an area protected by the caps outside the recess in the selector shaft body which receives the contact lever and is exposed to the effects of short-circuit-related discharges. With such an arrangement, the moving parts of the tensioning device remain essentially protected, so that the function of the selector shaft unit is hardly impaired by operational influences.
Gemäß einer Weiterbildung der Schaltwelleneinheit sind die Kappen mittels zwei zueinander diametral entgegengesetzt ausgebildeter Abschnitte mit den gegenüberliegenden Seiten des Schaltwellenkorpers formschlussig verbunden. Diese Konstruktion gewahrleistet einen schnellen und sicheren Einbau der Kappen. Als solche Abschnitte können zum Beispiel Vorsprunge dienen, die auf der Innenseite der Kappen ausgebildet und mit auf den gegenüberliegenden Seiten des Schaltwellenkorpers vorgesehenen Vertiefungen in Eingriff bringbar sind. Dabei ist es zweckmäßig, eine der Vertiefungen als eine im Schaltwellenkorper vorgesehene Durchgangsoffnung auszubilden, die gleichzeitig zur Aufnahme eines Stiftes zur Betätigung der Schaltwelleneinheit verwendet werden kann. Auf diese Weise können mehrere parallel zueinander angeordnete Schaltwellenemheiten durch einen einzigen, d e Schaltwellenkorper durchsetzenden stabformigen Stift betätigt werden .According to a development of the selector shaft unit, the caps are positively connected to the opposite sides of the selector shaft body by means of two diametrically opposed sections. This construction ensures a quick and safe installation of the caps. Such sections can be, for example, projections which are formed on the inside of the caps and can be brought into engagement with recesses provided on the opposite sides of the selector shaft body. It is expedient to design one of the depressions as a through opening provided in the selector shaft body, which can be used at the same time for receiving a pin for actuating the selector shaft unit. In this way, several can be parallel to each other arranged switching shaft units are actuated by a single rod rod which penetrates the switching shaft body.
Bei der erfmdungsgemaßen Schaltwelleneinheit ist die im wesentlichen aus zwei Federn bestehende Spannvorrichtung vorzugsweise in zwei kanalformigen Vertiefungen untergebracht, die sich auf den Seiten des Schaltwellenkorpers diametral und parallel zueinander erstrecken. Diese Vertiefungen bilden gleichzeitig Eingriffsabschnitte für auf der Innenseite der Kappen entsprechend vorgesehene Vorsprunge. Die Ausrichtung der Vertiefungen ist dabei vorzugsweise so zu wählen, daß die Erstreckungsrichtung einer jeden Vertiefung einen Winkel im Bereich von 20° bis 70° mit der Linie schließt, die die am Schaltwellenkorper ausgebildeten diametral entgegengesetzten Eingriffsabschnitte miteinander verbindet.In the shift shaft unit according to the invention, the tensioning device consisting essentially of two springs is preferably accommodated in two channel-shaped depressions which extend diametrically and parallel to one another on the sides of the shift shaft body. These depressions simultaneously form engagement sections for projections correspondingly provided on the inside of the caps. The orientation of the recesses should preferably be chosen so that the direction of extension of each recess closes an angle in the range from 20 ° to 70 ° with the line connecting the diametrically opposite engagement sections formed on the selector shaft body.
Bei einer weiteren alternativen Ausfuhrungsform der Schaltwelleneinheit umfassen die zur Herstellung einer formschlussigen Verbindung zwischen Schaltwellenkorper und Kappe vorgesehenen Abschnitte Vorsprunge, die auf den gegenüberliegenden Seiten des Schaltwellenkorpers ausgebildet und mit in den scheibenförmig ausgebildeten Kappen eingearbeiteten Aussparungen in Eingriff bringbar sind. Diese Aussparungen sind vorzugsweise als U-formige Ausschnitte in den scheibenförmigen Kappen ausgeführt, wobei von den Bodenabschnitten der U-formigen Ausschnitte rippenformige Vorsprunge ausgehen, die mit entsprechenden schlitzförmigen Vertiefungen des Schaltwellenkorpers in Eingriff bringbar sind.In a further alternative embodiment of the selector shaft unit, the sections provided for producing a positive connection between selector shaft body and cap comprise projections which are formed on the opposite sides of the selector shaft body and can be brought into engagement with recesses machined in the disc-shaped caps. These recesses are preferably designed as U-shaped cutouts in the disc-shaped caps, rib-shaped projections extending from the bottom sections of the U-shaped cutouts, which can be brought into engagement with corresponding slot-shaped depressions in the selector shaft body.
Bei dieser alternativen Konstruktion der Schaltwelleneinheit hat jede Kappe auf ihrer der eweiligen Seite des Schaltwellenkorpers zugewandten Innenseite vorzugsweise zwei sich kreuzende Vertiefungen, so daß unabhängig von der Montageseite der Kappe eine dieser Vertiefungen immer mit der kanalformigen Vertiefung am Schaltwellenkorper überdeckend ausgerichtet ist. Bei allen Ausfuhrungsformen der Schaltwelleneinheit hat jede Kappe auf ihrer Außenseite vorzugsweise einen Lagerzapfen zur Lagerung des Schaltwellenkorpers, wobei der Lagerzapfen einen wesentlich kleineren Durchmesser als der Durchmesser des an sich zylindrisch ausgebildeten Schaltwellenkorpers aufweist. Dadurch wird die Gefahr einer Beeinträchtigung der Lagerstelle der Schaltwelleneinheit durch kurzschlußbedingte Entladungen im Kontaktraum des Schalters weitgehend beseitigt und gleichzeitig die Reibung an der Lagerstelle minimiert.In this alternative construction of the selector shaft unit, each cap preferably has two intersecting depressions on its inside facing the eternal side of the selector shaft body, so that one of these depressions is always aligned with the channel-shaped recess on the selector shaft body regardless of the mounting side of the cap. In all embodiments of the selector shaft unit, each cap preferably has a bearing pin on its outside for mounting the selector shaft body, the bearing pin having a substantially smaller diameter than the diameter of the selector shaft body, which is cylindrical in itself. As a result, the risk of the bearing point of the selector shaft unit being impaired by discharges caused by short-circuiting in the contact space of the switch is largely eliminated and, at the same time, the friction at the bearing point is minimized.
Eine alternative Kombinationslosung der erfmdungsgemaßen Aufgabe kann auch durch eine Schaltwelleneinheit erreicht werden, bei welcher die Spannvorrichtung außerhalb des den Kontakthebel aufnehmenden Raumes im Inneren des Schaltwellenkorpers oder am Schaltwellenkorper abgedeckt angeordnet ist. Die abgedeckte Anordnung der Spannvorrichtung kann im Spezialfall wiederum durch losbare Kappen am Schaltwellenkorper erreicht werden.An alternative combination solution of the object according to the invention can also be achieved by a shift shaft unit, in which the tensioning device is arranged covered outside the space receiving the contact lever in the interior of the shift shaft body or on the shift shaft body. In special cases, the covered arrangement of the tensioning device can in turn be achieved by detachable caps on the selector shaft body.
Die Erfindung wird im folgenden anhand von zweiThe invention will now be described with reference to two
Ausfuhrungsbeispielen unter Bezugnahme auf Zeichnungen naher erläutert :Exemplary embodiments with reference to drawings explained in more detail:
Es zeigen:Show it:
Fig. 1: eine teilweise Schnittansicht eines Gehäuses einer Lichtbogenloscheinrichtung eines Niederspannungsschalters mit, in dem die erfmdungsgemaße Schaltwelleneinheit eingebaut ist;1 shows a partial sectional view of a housing of an arc-quenching device of a low-voltage switch, in which the switching shaft unit according to the invention is installed;
Fig. 2: die in Fig. 1 dargestellte Schaltwelleneinheit im ausgeschalteten Zustand des Schalters;FIG. 2: the switching shaft unit shown in FIG. 1 when the switch is switched off;
Fig. 3a: eine perspektivische teilweise Explosionsdarstellung einer ersten Ausfuhrungsform der erfmdungsgemaßen Schaltwelleneinheit; Fig. 3b: eine Darstellung der Schaltwelleneinheit in Fig. 3a in einem teilweise zusammengebauten Zustand;3a: a perspective, partially exploded view of a first embodiment of the shift shaft unit according to the invention; 3b: a representation of the shift shaft unit in FIG. 3a in a partially assembled state;
Fig. 4a: eine perspektivische, teilweise Explosionsdarstellung einer zweiten Ausfuhrungsform der erfmdungsgemaßen Schaltwelleneinheit;4a: a perspective, partially exploded view of a second embodiment of the shift shaft unit according to the invention;
Fig. 4b: eine Darstellung der Schaltwelleneinheit in Fig. 5a in einem teilweise zusammengebauten Zustand; undFIG. 4b: an illustration of the shift shaft unit in FIG. 5a in a partially assembled state; and
Ein in Fig. 1 nicht im einzelnen gezeigterA not shown in Fig. 1 in detail
Niederspannungsschalter hat eine Lichtbogenloscheinrichtung, die aus einem Gehäuse 11, einer in dem Gehäuse untergebrachten Schaltwelleneinheit 9, Lichtbogenkammern, Stromfuhrungsleitern 16 und weiteren Teilen besteht, die die Lichtbogenloschung verbessern. Das Gehäuse 11 der Lichtbogenloscheinrichtung ist in einem nicht im einzelnen gezeigten Gehäuse des Niederspannungsschalters montiert. Die Schaltwelleneinheit 9 dient dazu, eine elektrische Verbindung zwischen den zwei Stromfuhrungsleitern 16 herzustellen.The low-voltage switch has an arc-quenching device, which consists of a housing 11, a switching shaft unit 9 accommodated in the housing, arc chambers, current-carrying conductors 16 and other parts which improve the arc-quenching. The housing 11 of the arc extinguishing device is mounted in a housing of the low-voltage switch, which is not shown in detail. The switching shaft unit 9 serves to establish an electrical connection between the two current-carrying conductors 16.
Die Schaltwelleneinheit 9 besteht im wesentlichen aus einem zylindrisch ausgebildeten Schaltwellenkorper 2, an dem ein S- formiger Kontakthebel 3 mittels einer in diesem Korper eingebauten Lagerachse 5 drehbar abgestutzt ist. Die ganze Schaltwelleneinheit 9 ist m einem nicht dargestellten Aufnahmeabschnitt des Gehäuses 11 drehbar gelagert, wobei die besondere Art dieser Lagerung im Rahmen der nachfolgenden Darstellung des konstruktiven Aufbaus der Schaltwelleneinheit im einzelnen erläutert wird.The selector shaft unit 9 essentially consists of a cylindrical selector shaft body 2, on which an S-shaped contact lever 3 is rotatably supported by means of a bearing shaft 5 installed in this body. The entire selector shaft unit 9 is rotatably mounted in a receiving section (not shown) of the housing 11, the particular type of this bearing being explained in detail in the context of the following illustration of the structural design of the selector shaft unit.
Die Schaltwelleneinheit 9 ist mittels eines Gelenks 10 betatigbar, um den in Fig. 1 gezeigten eingeschalteten Zustand oder den in Fig. 2 gezeigten ausgeschalteten Zustand des Schalters zu erreichen.The switching shaft unit 9 can be actuated by means of a joint 10 in order to achieve the switched-on state shown in FIG. 1 or the switched-off state of the switch shown in FIG. 2.
Wie der Fig. 3a im einzelnen zu entnehmen ist, besteht die Schaltwelleneinheit 9 aus einem Schaltwellenkorper 2, der rotationssymmetrisch, in etwa zylindrisch, ausgebildet ist. Die Achse des zylindrischen Schaltwellenkorpers 2 fallt mit der geometrischen Achse der Lagerachse 5 zusammen, an dem der Kontakthebel 3 schwenkbar gelagert ist. Der Kontakthebel 3 ist in einer sich senkrecht zur Achse des Schaltwellenkorpers 2 erstreckenden Aussparung 2e aufgenommen, die den Schaltwellenkorper 2 diametral durchsetzt.As can be seen in detail in FIG. 3a, the selector shaft unit 9 consists of a selector shaft body 2, which is rotationally symmetrical, approximately cylindrical. The The axis of the cylindrical shift shaft body 2 coincides with the geometric axis of the bearing axis 5, on which the contact lever 3 is pivotally mounted. The contact lever 3 is received in a recess 2e which extends perpendicular to the axis of the selector shaft body 2 and passes through the selector shaft body 2 diametrically.
Auf beiden Stirnseiten des zylindrischen Schaltwellenkorpers 2 sind Vertiefungen 2c vorgesehen, die sich diametral und parallel zueinander erstrecken und kanalformig ausgebildet sind. An den Enden der kanalformigen Vertiefungen 2c sind jeweils in der Wandung zwischen der mittigen Aussparung 2e und des Bodenabschnitts der jeweiligen Vertiefung 2c U-formige Schlitze 2d eingearbeitet, die zur Aufnahme von Stiften 6 vorgesehen sind. Auf jedem Stift 6 ist in etwa mittig eine Rolle 6a drehbar gelagert, die in der Aussparung 2e gleitend aufgenommen ist. In den kanalformigen Vertiefungen 2c sind Feder 7 aufgenommen, die beidseitig an den Spannstiftenden auf jeder Stirnseite des Schaltwellenkorpers 2 eingehängt sind. Die Lange der Schlitze 2d ist dabei im Vergleich zu der Breite des mittigen Lagerabschnitts des S-formigen Kontakthebels 3 so bemessen, daß unabhängig vom Betriebszustand des Schalters die Stifte 6 unter keinen Umstanden bis zum Anschlag an den Boden der U-formigen Schlitze 2d zusammengezogen werden können. Eine Verdrehung des Schaltwellenkorpers 2 fuhrt dazu, daß die Rollen 6a der Stifte 6 auf den jeweils anliegenden Scheiteln des S- formigen Kontakthebels 3 abrollen und dabei entgegen der die Spannstifte 6 zusammenziehenden Kraft der Feder 7 in den Schlitzen 2d auseinandergedruckt werden, um dadurch eine standige Spannkraft auf den Kontakthebel 3 entgegen dem Uhrzeigersinn auszuüben.On both ends of the cylindrical switching shaft body 2 there are depressions 2c which extend diametrically and parallel to one another and are channel-shaped. At the ends of the channel-shaped recesses 2c, U-shaped slots 2d are provided in the wall between the central recess 2e and the bottom section of the respective recess 2c, which are provided for receiving pins 6. On each pin 6, a roller 6a is rotatably mounted approximately in the center and is slidably received in the recess 2e. Spring 7 is accommodated in the channel-shaped depressions 2 c, which are hooked in on both sides at the spring pin ends on each end face of the selector shaft body 2. The length of the slots 2d is dimensioned in comparison to the width of the central bearing section of the S-shaped contact lever 3 so that, regardless of the operating state of the switch, the pins 6 are under no circumstances contracted up to the stop on the bottom of the U-shaped slots 2d can. Rotation of the selector shaft body 2 leads to the rollers 6a of the pins 6 rolling on the respective vertices of the S-shaped contact lever 3 and being pressed apart in the slots 2d against the force of the spring 7 which pulls the spring pins 6 together, thereby resulting in a constant Apply clamping force to the contact lever 3 counterclockwise.
Der Schaltwellenkorper 2 weist des weiteren eine Aufnahmeoffnung 2b auf, in welcher ein stabformiger Stift 1 aufgenommen ist. Diametral entgegengesetzt zu der Aufnahmeoffnung 2b sind auf beiden Stirnseiten des Schaltwellenkorpers 2 U-formige Aussparungen 2a eingearbeitet. Auf beiden Seiten des zylindrischen Schaltwellenkorpers 2 sind Kappen 8 vorgesehen. Jede Kappe 8 hat einen umfangseitigen, zylindrischen Kragenabschnitt 8e und ist an ihrer Innenseite mit einem Paar in etwa diametral verlaufenden Verstarkungsπppen 8c sowie einem unabhängig von diesen ausgebildeten U-formigen Rippenabschnitt 8a versehen. Die Verstarkungrippen dienen dabei auch zur Erhöhung der Kriech- und Luftstrecken in der Lichtbogenloscheinrichtung des Schalters.The Schaltwellenkorper 2 further has a receiving opening 2b, in which a rod-shaped pin 1 is received. Diametrically opposite to the receiving opening 2b, 2 U-shaped cutouts 2a are machined on both end faces of the switching shaft body. Caps 8 are provided on both sides of the cylindrical switching shaft body 2. Each cap 8 has a circumferential, cylindrical collar section 8e and is provided on its inside with a pair of approximately diametrically extending reinforcing steps 8c and a U-shaped rib section 8a which is formed independently of these. The reinforcing ribs also serve to increase the creepage distances and clearances in the arc quenching device of the switch.
Zwischen den Verstarkungrippen 8c einer jeden Kappe 8 ist jeweils eine Vertiefung 8ι ausgebildet, die sich auf der Innenseite der Kappe 8 diametral erstreckt. Die Kappen sind bei ihrer Montage derart am Schaltwellenkorper 2 positionierbar, daß die Vertiefungen 8ι jeweils in einer Ebene mit den Schlitzen 2d des Schaltwellenkorpers 2 liegen und die Enden der Stifte 6 lagernd aufnehmen. Die bei einer solchen Anordnung als axiale Begrenzung für die Stifte 6 wirksamen Vertiefungen 8ι dienen somit als Fuhrungen für die Stifte 6 bei ihrer betriebsbedingten Verschiebung m den Schlitzen 2d, so daß ein eventuelles Verkanten der Stifte in den Schlitzen 2d in wirksamer Weise vermieden werden kann.Between the reinforcing ribs 8c of each cap 8, a recess 8ι is formed, which extends diametrically on the inside of the cap 8. The caps can be positioned on the selector shaft body 2 in such a way that the recesses 8ι each lie in one plane with the slots 2d of the selector shaft body 2 and accommodate the ends of the pins 6 in stock. In such an arrangement as an axial limitation for the pins 6 recesses 8ι thus serve as guides for the pins 6 in their operational displacement m the slots 2d, so that a possible tilting of the pins in the slots 2d can be effectively avoided.
Bei Anbringung der jeweiligen Kappe 8 an der entsprechenden Stirnseite des Schaltwellenkorpers 2 gelangen die Abschnitte 8c und 8a in formschlussiger Verbindung mit der kanalformigen Vertiefung 2c und der am Rand des Schaltwellenkorpers 2 ausgebildeten, U-formigen Aussparung 2a.When the respective cap 8 is attached to the corresponding end face of the selector shaft body 2, the sections 8c and 8a come into positive connection with the channel-shaped recess 2c and the U-shaped recess 2a formed on the edge of the selector shaft body 2.
Die Kappe 8 hat des weiteren eine Öffnung, die durch einen sich auf der Innenseite der Kappe erstreckenden zylindrischen Abschnitt 8b gebildet ist. Der zylindrische Abschnitt 8b befindet sich diametral entgegengesetzt zu dem hervorstehenden U-formigen Rippenabschnitt 8a und hat einen Außendurchmesser, der in etwa dem Innendurchmesser der im Schaltwellenkorper 2 ausgebildeten Aufnahmeoffnung 2b entspricht. Die den Mittelpunkt des zylindrischen Abschnitts 8b mit dem Mittelpunkt des U- formigen Rippenabschnitts 8a verbindende Linie schließt mit der zwischen den Rippen 8c hypothetisch gezogenen Diametrallmie den gleichen Winkel, wie der Winkel zwischen der die Aussparung 2a mit der Aufnahmeoffnung 2b verbindende Linie und der Mittellinie der kanalformigen Vertiefung 2c. Dieser Winkel liegt grundsatzlich zwischen 20° und 70°, vorzugsweise bei ca. 65°.The cap 8 also has an opening formed by a cylindrical portion 8b extending on the inside of the cap. The cylindrical section 8b is located diametrically opposite the protruding U-shaped rib section 8a and has an outer diameter which corresponds approximately to the inner diameter of the receiving opening 2b formed in the selector shaft body 2. The line connecting the center point of the cylindrical section 8b with the center point of the U-shaped rib section 8a closes the same angle with the diametral line hypothetically drawn between the ribs 8c as the angle between the recess 2a line connecting the receiving opening 2b and the center line of the channel-shaped recess 2c. This angle is generally between 20 ° and 70 °, preferably around 65 °.
Auf der Außenseite einer der Kappen 8 ist auf der zu der Öffnung des zylindrischen Abschnitts 8b diametral entgegengesetzten Seite, d. h. hinter dem U-formigen Rippenabschnitt 8a, ein stiftformiger Zapfen 8d vorgesehen. Der Zapfen 8d dient als Einbausicherung, damit der Schaltwellenkorper 2 richtig in das Gehäuse 11 des nicht im einzelnen gezeigten Schalters eingebaut werden kann.On the outside of one of the caps 8 is on the diametrically opposite side to the opening of the cylindrical portion 8b, i.e.. H. behind the U-shaped rib section 8a, a pin-shaped pin 8d is provided. The pin 8d serves as an installation safety device so that the selector shaft body 2 can be installed correctly in the housing 11 of the switch (not shown in detail).
Jede Kappe 8 ist an ihrer Außenseite mit einem Lagerzapfen 8f versehen, der zur axialen Lagerung der Schaltwelleneinheit 9 in dem nicht dargestellten Aufnahmeabschnitt des Schaltergehauses 11 dient. Auf der stirnseitigen Außenflache einer jeden Kappe sind zwei diametral entgegengesetzt zueinander liegende Offnungen 8g ausgebildet, die zur Druckentlastung des Schaltwellenkorpers 2 dienen. Eine der Kappen 8 weist an ihrem Kragenabschnitt 8e einen vorspringenden Abschnitt 8h auf, der gleichzeitig zur Markierung der richtigen Montagestellung der Kappe und umfangseitigen Abdeckung der Schlitze 2d und der Rollen 6a im Schaltwellenkorper 2 dient.Each cap 8 is provided on its outside with a journal 8f, which is used for the axial mounting of the selector shaft unit 9 in the receiving section of the switch housing 11, not shown. On the front outer surface of each cap, two diametrically opposite openings 8g are formed, which serve to relieve the pressure on the selector shaft body 2. One of the caps 8 has on its collar portion 8e a projecting portion 8h, which at the same time serves to mark the correct mounting position of the cap and the circumferential covering of the slots 2d and the rollers 6a in the selector shaft body 2.
Bei der Montage der Schaltwelleneinheit 9 wird zunächst der Kontakthebel 3 in die Aussparung 2e des Schaltwellenkorpers 2 so eingepaßt, daß der als Gelenkachse dienende Stift 5 von außen durch den Schaltwellenkorper 2 und eine nicht m einzelnen dargestellte Lageroffnung des Kontakthebels 3 durchgeschoben werden kann. Daraufhin werden die Stifte 6 in die Schlitze 2d eingesetzt und die Feder 7 auf beide Seiten des Schaltwellenkorpers an den Stiftenden unter leichtes Auseinanderziehen der Feder eingehängt. Anschließend werden die zwei Kappen 8 zunächst soweit auf beiden Stirnseiten des Schaltwellenkorpers 2 zusammengedruckt, bis der auf der Innenseiten der Kappen vorgesehene U-formige Rippenabschnitt 8a, die Rippen 8c und der zylmderformige Abschnitt 8b entsprechend in die U-formige Aussparung 2a, die kanalformige Vertiefung 2c und die Aufnahmeoffnung 2b eingepaßt werden. Die Kappen 8 sind vorzugsweise aus Kunststoff gefertigt, so daß die auf der Innenseite der Kappen vorgesehenen erhabenen Abschnitte 8a, 8c und 8a unter leichtem Preßdruck auf beiden Seiten des Schaltwellenkorpers 2 eingesetzt werden können und daher keine zusatzliche Mittel zur Befestigung dieser Kappen am Schaltwellenkorper erforderlich sind.When assembling the selector shaft unit 9, the contact lever 3 is first fitted into the recess 2e of the selector shaft body 2 so that the pin 5 serving as the articulated axis can be pushed from the outside through the selector shaft body 2 and a bearing opening of the contact lever 3 (not shown individually). Then the pins 6 are inserted into the slots 2d and the spring 7 is hung on both sides of the selector shaft body at the pin ends with the spring being pulled apart slightly. The two caps 8 are then first pressed together on both end faces of the switching shaft body 2 until the U-shaped rib section 8a provided on the inside of the caps, the ribs 8c and the cylinder-shaped section 8b correspondingly in the U-shaped recess 2a, the channel-shaped recess 2c and the receiving opening 2b are fitted. The caps 8 are preferably made of plastic, so that the provided on the inside of the caps raised portions 8a, 8c and 8a can be used under slight pressure on both sides of the shift shaft body 2 and therefore no additional means for attaching these caps to the shift shaft body are required.
Die auf diese Weise zusammengebaute Schaltwelleneinheit 9 wird dann in das Gehäuse 11 der Lichtbogenloscheinrichtung in einem in Fig. 1 nicht im einzelnen gezeigten Aufnahmeabschnitt so angeordnet, daß die sich auf beiden Seiten der Schaltwelleneinheit axial erstreckenden Lagerzapfen 8f in entsprechende Konturen mit Gleitlagerabschnitten des Aufnahmeabschnitts aufgenommen werden können. Daraufhin wird das in Fig. 1 gezeigte Gelenk 10 auf einer Außenseite des Gehäuses 11 so angebracht, so daß der stabformige Stift 1 in eine am unteren Ende des Gelenks 10 ausgebildete Ose und eine mit der Ose fluchtend ausgerichtete Öffnung eines der zylindrischen Abschnitte 8b der Kappen 8 eingesetzt werden kann.The switching shaft unit 9 assembled in this way is then arranged in the housing 11 of the arc-quenching device in a receiving section (not shown in detail in FIG. 1) such that the bearing journals 8f extending axially on both sides of the switching shaft unit are received in corresponding contours with slide bearing sections of the receiving section can. Then, the joint 10 shown in Fig. 1 is attached to an outside of the housing 11 so that the rod-shaped pin 1 into an eye formed at the lower end of the joint 10 and an opening aligned with the eye of one of the cylindrical portions 8b of the caps 8 can be used.
Die Figuren 4a und 4b zeigen eine weitere Ausfuhrungsform der erfmdungsgemaßen Schaltwelleneinheit 9. Diese Ausfuhrungsform der Schaltwelleneinheit unterscheidet sich von der ersten in den Figuren 3a und 3b gezeigten Ausfuhrungsform im wesentlichen durch die andersartige Ausbildung der Stirnseiten des Schaltwellenkorpers und der Kappen.FIGS. 4a and 4b show a further embodiment of the selector shaft unit 9 according to the invention. This embodiment of the selector shaft unit differs from the first embodiment shown in FIGS. 3a and 3b essentially by the different design of the end faces of the selector shaft body and the caps.
Der in den Figuren 4a und 4b dargestellte Schaltwellenkorper 22 hat eine sich senkrecht zur Achse des Schaltwellenkorpers erstreckende Aussparung 22e, in der der Kontakthebel 23 mit den Kontaktelementen 24 aufgenommen und auf einem Stift 25 gelagert ist. In der gleichen Art und Weise wie bei der ersten Ausfuhrungsform gelangen die erweiterten zylindrischen Abschnitte 26a der Stifte 26 in Anlage mit den Scheitelflachen des S-formigen Kontakthebels 23, wie das in der Darstellung der Fig. 1 angedeutet ist, um bei einer Verdrehung des Schaltwellenkorpers 22 entgegen dem Uhrzeigersinn eine elastische Anpreßkraft auf den Kontakthebel in seiner Schließstellung auszuüben. Dieser Mechanismus wurde bereits bei der ersten Ausfuhrungsform erläutert.The control shaft body 22 shown in FIGS. 4a and 4b has a recess 22e which extends perpendicular to the axis of the control shaft body and in which the contact lever 23 is received with the contact elements 24 and is mounted on a pin 25. In the same manner as in the first embodiment, the enlarged cylindrical sections 26a of the pins 26 come into contact with the apex surfaces of the S-shaped contact lever 23, as is indicated in the illustration in FIG. 1, when the selector shaft body is rotated 22 counterclockwise an elastic contact pressure on the contact lever in his Exercise closed position. This mechanism was already explained in the first embodiment.
Auf einer jeden Stirnseite des Schaltwellenkorpers 22 sind jeweils 2 in etwa rechteckige Vorsprunge 22a, 22b diametral zueinander entgegengesetzt ausgebildet. Die auf beiden Stirnseiten des Schaltwellenkorpers 22 ausgebildeten Vorsprunge 22b bilden die Auslaufe eines im Schaltwellenkorper 22 zur Aufnahme eines stabformigen Stiftes 21 vorgesehenen Bohrungsabschnitts, wahrend in den diametral dazu entgegengesetzt ausgebildeten Vorsprungen 22a lediglich Offnungen 22g ausgebildet sind. Zwischen den Vorsprungen 22a und 22b ist eine diametral verlaufende kanalformige Vertiefung 22c zur Aufnahme der Feder 27 ausgebildet. Entlang der zueinander gegenüberliegenden Seiten der Vorsprunge 22a, 22b sind in den Stirnseiten des Schaltwellenkorpers 22 schlitzförmige Vertiefungen 22f ausgebildet.On each end face of the switching shaft body 22, two approximately rectangular projections 22a, 22b are diametrically opposed to one another. The projections 22b formed on both end faces of the selector shaft body 22 form the outlets of a bore section provided in the selector shaft body 22 for receiving a rod-shaped pin 21, while only openings 22g are formed in the diametrically opposite projections 22a. A diametrically extending channel-shaped recess 22c for receiving the spring 27 is formed between the projections 22a and 22b. Slit-shaped depressions 22f are formed in the end faces of the switching shaft body 22 along the opposite sides of the projections 22a, 22b.
Auf beiden Seiten des Schaltwellenkorpers 22 sind aus flachem Material ausgebildete tellerförmige Kappen 28 vorgesehen. Diese Kappen haben eine im wesentlichen flache Scheibenform mit diametral zueinander entgegengesetzt ausgebildeten Ausschnitte 28a, 28b, die beim Aufsetzen der Kappen dazu geeignet sind, die an den Stirnseiten des Schaltwellenkorpers 22 ausgebildeten Vorsprunge 22a, 22b aufzunehmen. Die U-formigen Ausschnitte 28a, 28b haben in ihrem Bodenbereich zu der Montageseite der Kappen 28 hm abgewinkelten Abschnitte 28c, die ihrer Lange nach der Breite der Ausschnitte 28a, 28b entsprechenden, zur festen Anbringung der Kappen an die Stirnseiten des Schaltwellenkorpers 22 in die schlitzförmigen Vertiefungen 22f steckbar sind und gleichzeitig zur Erhöhung der Kriech- und Luftstrecken im Schalter dienen.Plate-shaped caps 28 made of flat material are provided on both sides of the switching shaft body 22. These caps have a substantially flat disk shape with diametrically opposed cutouts 28a, 28b which, when the caps are put on, are suitable for receiving the projections 22a, 22b formed on the end faces of the selector shaft body 22. The U-shaped cutouts 28a, 28b have, in their base area, sections 28c angled to the mounting side of the caps 28 hm, which correspond to their length according to the width of the cutouts 28a, 28b, for firmly attaching the caps to the end faces of the selector shaft body 22 into the slot-shaped ones Recesses 22f are pluggable and at the same time serve to increase the creepage distances and clearances in the switch.
In einer jeden Innenflache der Kappen 28, die jeweils einer der Stirnseiten des Schaltwellenkorpers 22 zugewandt ist, ist außerdem eine X-formige Vertiefung 28e ausgebildet, die unabhängig von der Stirnseite, an welcher die Kappe anzubringen ist, dazu geeignet ist, einen von der Stirnflache des Schaltwellenkorpers nach außen hm vorstehenden Abschnitt der Feder 27 aufzunehmen. Diese Ausbildung der Vertiefung 28e gestattet eine Austauschbarkeit der auf beiden Seiten des Schaltwellenkorpers 22 anzubringenden Kappen 28. Wie der Darstellung in Figur 4b zu entnehmen ist, entspricht der Durchmesser der tellerförmigen Kappen 28 dem Durchmesser des zylinderformigen Schaltwellenkorpers 22, so daß im montierten Zustand die Rander der Kappen 28 bundig mit der zylindrischen Umfangsflache des Schaltwellenkorpers 22 ausgerichtet sind.In each inner surface of the caps 28, which in each case faces one of the end faces of the selector shaft body 22, an X-shaped recess 28e is also formed, which, regardless of the end face to which the cap is to be attached, is suitable for one of the end faces of the shift shaft body to the outside in the projecting section of Take up spring 27. This design of the recess 28e permits interchangeability of the caps 28 to be fitted on both sides of the selector shaft body 22. As can be seen in the illustration in FIG. 4b, the diameter of the plate-shaped caps 28 corresponds to the diameter of the cylindrical selector shaft body 22, so that the edges in the assembled state the caps 28 are aligned flush with the cylindrical peripheral surface of the selector shaft body 22.
Auf der Außenseite einer jeden der Kappen 28 ist em Lagerzapfen 28f vorgesehen, mittels dessen die Schaltwelleneinheit in einem entsprechend ausgebildeten, in Fig. 1 nicht im einzelnen gezeigten Lagerabschnitt des Gehäuses 11 drehbar gelagert werden kann.On the outside of each of the caps 28 there is provided a bearing journal 28f, by means of which the selector shaft unit can be rotatably mounted in a correspondingly designed bearing section of the housing 11, which is not shown in detail in FIG. 1.
Durch die oben im einzelnen dargestellte Ausbildung der Schaltwelleneinheit ist zugleich eine konstruktiv einfach gestaltete Lagerung der Schaltwelleneinheit im Schaltergehause und gleichzeitig em zuverlässiger Schutz der beweglichen Teile im Schaltwellenkorper gegen elektrische Entladungen bei Überschlagen gewährleistet. Außerdem werden die Kriech- und Luftstrecken von dem Kontakthebel 3, den Federn 7 und den Stiften 6 zum stabformigen Stift 1, der bei einem einpoligen Schalter einen nicht im einzelnen dargestellten Antrieb mit der Schaltwelleneinheit verbindet und bei mehrpoligen Schaltern sowohl diesen Antrieb mit den Schaltwellene heiten als auch die Schaltwelenemheiten untereinander verbindet, erhöht. Die Kappen sind so ausgebildet, daß sie eine zuverlässige Verbindung mit dem Schaltwellenkorper gewahrleisten. Der Zugang der bei Kurzschlüssen entstehenden Gase zur beweglichen Teile des Schalters und der Schaltwelleneinheit ist dadurch erschwert und eine verbesserte Abschirmung von einer benachbarten Schaltereinheit gewährleistet.The design of the selector shaft unit shown in detail above at the same time ensures that the selector shaft unit is mounted in the switch housing in a structurally simple manner and at the same time ensures reliable protection of the moving parts in the selector shaft body against electrical discharges in the event of rollovers. In addition, the creepage distances and clearances from the contact lever 3, the springs 7 and the pins 6 to the rod-shaped pin 1, which connects a drive (not shown in detail) to the switching shaft unit in a single-pole switch, and in multipole switches, both this drive with the switching shafts as well as connecting the switching world units with each other, increased. The caps are designed so that they ensure a reliable connection with the Schaltwellenkorper. The access of the gases resulting from short circuits to the moving parts of the switch and the selector shaft unit is thereby made more difficult and improved shielding from an adjacent switch unit is ensured.
Eine Fehlmontage der Kappen ist unmöglich, weil diese entweder äußerlich voneinander deutlich unterscheidbar sind und daher einer bestimmten Seite des Schaltwellenkorpers zugeordnet werden können, oder eine identische Form aufweisen, dann aber an einer beliebigen Stirnseite des Schaltwellenkorpers anbringbar sind. Bei einer nicht im einzelnen dargestellten Ausfuhrungsform der erfmdungsgemaßen Schaltereinheit kann zur Vereinfachung der Herstellung auf die abnehmbaren Kappen verzichtet werden, indem die Spannvorrichtung zwar außerhalb des den Kontakthebel aufnehmenden Bereiches der Aussparung 2e, 22e, jedoch noch geschützt im Inneren des Schaltwellenkorpers untergebracht ist. Incorrect assembly of the caps is impossible because they are either clearly distinguishable from the outside and can therefore be assigned to a specific side of the selector shaft body, or have an identical shape, but can then be attached to any end face of the selector shaft body. In one embodiment of the switch unit according to the invention, which is not shown in detail, the removable caps can be dispensed with in order to simplify production, in that the tensioning device is accommodated outside the area of the recess 2e, 22e which receives the contact lever, but is still protected inside the switching shaft body.

Claims

Patentansprüche claims
1. Schaltwelleneinheit für Schalter mit einem Schaltwellenkorper (2; 22) und einem am Schaltwellenkorper gelagerten Kontakthebel (3; 23), dadurch gekennzeichnet, daß auf zwei gegenüberliegenden Seiten des Schaltwellenkorpers (2; 22) Kappen (8; 28) zur Abdeckung und Lagerung des Schaltwellenkorpers (2; 22) angebracht sind.1. switching shaft unit for switches with a Schaltwellenkorper (2; 22) and a mounted on the Schaltwellenkorper contact lever (3; 23), characterized in that on two opposite sides of the Schaltwellenkorpers (2; 22) caps (8; 28) for covering and storage of the shift shaft body (2; 22) are attached.
2. Schaltwelleneinheit nach Anspruch 1, dadurch gekennzeichnet, daß der Kontakthebel (3; 23) mittels einer im wesentlichen auf den gegenüberliegenden Seiten des Schaltwellenkorpers (2; 23) angeordneten und von den Kappen (8; 28) abgedeckten Spannvorrichtung (7, 2d) beaufschlagbar2. selector shaft unit according to claim 1, characterized in that the contact lever (3; 23) by means of a substantially on the opposite sides of the selector shaft body (2; 23) and from the caps (8; 28) covered clamping device (7, 2d) actable
3. Schaltwelleneinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kappen (8; 28) mittels zwei zueinander diametral entgegengesetzt ausgebildeter Abschnitte (8a, 8b; 28a, 28b) formschlussig mit den gegenüberliegenden Seiten des Schaltwellenkorpers (2; 22) verbunden sind.3. Switching shaft unit according to claim 1 or 2, characterized in that the caps (8; 28) by means of two diametrically opposite sections (8a, 8b; 28a, 28b) are positively connected to the opposite sides of the switching shaft body (2; 22) .
4. Schaltwelleneinheit nach Anspruch 3, dadurch gekennzeichnet, daß die Abschnitte auf der Innenseite der Kappen (8) ausgebildete Vorsprunge (8a, 8b) darstellen, die mit auf den gegenüberliegenden Seiten des Schaltwellenkorpers (2) vorgesehenen Vertiefungen (2a, 2b) in Eingriff bringbar sind.4. shift shaft unit according to claim 3, characterized in that the sections on the inside of the caps (8) formed projections (8a, 8b), which with on the opposite sides of the shift shaft body (2) provided recesses (2a, 2b) in engagement are feasible.
5. Schaltwelleneinheit nach Anspruch 4, dadurch gekennzeichnet, daß eine der Vertiefungen durch eine im Schaltwellenkorper (2) vorgesehene Durchgangsoffnung (2b) zur Aufnahme eines Stiftes5. switching shaft unit according to claim 4, characterized in that one of the recesses through a in the Schaltwellenkorper (2) provided through opening (2b) for receiving a pin
(1) zur Betätigung der Schaltwelleneinheit ausgebildet ist.(1) is designed to actuate the shift shaft unit.
6. Schaltwelleneinheit nach Anspruch 4 oder 5, gekennzeichnet durch eine sich diametral im Schaltwellenkorper (2) erstreckende kanalformige Vertiefung (2c) zur Aufnahme der Spannvorrichtung (7, 2d) und von zwei weiteren, auf der Innenseite der jeweiligen Kappe (8) vorgesehenen Vorsprungen (8c) .6. shift shaft unit according to claim 4 or 5, characterized by a diametrically in the shift shaft body (2) extending channel-shaped recess (2c) for receiving the tensioning device (7, 2d) and two more on the Projections (8c) provided on the inside of the respective cap (8).
7. Schaltwelleneinheit nach Anspruch 3, dadurch gekennzeichnet, daß die Abschnitte in den Kappen (8) ausgebildete Ausschnitte7. shift shaft unit according to claim 3, characterized in that the sections in the caps (8) formed cutouts
(28a, 28b) darstellen, die mit auf den gegenüberliegenden Seiten des Schaltwellenkorpers (22) vorgesehenen Vorsprungen (22a, 22b) in Eingriff bringbar sind.(28a, 28b), which can be brought into engagement with projections (22a, 22b) provided on the opposite sides of the selector shaft body (22).
8. Schaltwelleneinheit nach Anspruch 7, dadurch gekennzeichnet, daß die Aussparungen U-formige Ausschnitte in den scheibenförmig ausgebildeten Kappen (28) darstellen, wobei von den Bodenabschnitten der U-formigen Ausschnitte abgewinkelte Abschnitte (28c) ausgehen, die mit entsprechenden schlitzförmigen Vertiefungen (22f) des Schaltwellenkorpers (22) m Eingriff bringbar sind.8. Switching shaft unit according to claim 7, characterized in that the recesses represent U-shaped cutouts in the disc-shaped caps (28), with angled sections (28c) extending from the bottom sections of the U-shaped cutouts, which have corresponding slot-shaped depressions (22f ) of the shift shaft body (22) can be brought into engagement.
9. Schaltwelleneinheit nach Anspruch 7 oder 8, gekennzeichnet durch eine sich diametral im Schaltwellenkorper (22) erstreckende kanalformige Vertiefung (22c) zur Aufnahme der Spannvorrichtung (26, 27).9. shift shaft unit according to claim 7 or 8, characterized by a diametrically in the shift shaft body (22) extending channel-shaped recess (22c) for receiving the clamping device (26, 27).
10. Schaltwelleneinheit nach Anspruch 6 oder 9, dadurch gekennzeichnet, daß die Vertiefung (2c; 22c) in ihrer Erstreckungsrichtung einen Winkel im Bereich von 20° bis 70° mit der die Vertiefungen (2a, 2b) bzw. Vorsprunge (22a, 22b) miteinander verbindenden Linie schließt.10. Switching shaft unit according to claim 6 or 9, characterized in that the recess (2c; 22c) in its direction of extension an angle in the range of 20 ° to 70 ° with which the recesses (2a, 2b) or projections (22a, 22b) connecting line closes.
11. Schaltwelleneinheit nach den Ansprüchen 9 und 10, dadurch gekennzeichnet, daß jede Kappe (28) auf ihrer der jeweiligen Seite des Schaltwellenkorpers (22) zugewandten Innenseite eine X-formige Vertiefung (28e) aufweist, so daß unabhängig von der Montageseite der Kappe (28) die Vertiefung (28e) immer mit der kanalformigen Vertiefung (22c) überdeckend ausgerichtet ist.11. selector shaft unit according to claims 9 and 10, characterized in that each cap (28) on its respective side of the selector shaft body (22) facing the inside has an X-shaped recess (28e), so that regardless of the mounting side of the cap ( 28) the recess (28e) is always aligned with the channel-shaped recess (22c).
12. Schaltwelleneinheit nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß jede Kappe (8; 28) auf ihrer Außenseite einen Lagerzapfen (8b; 28b) zur Lagerung des Schaltwellenkorpers (2; 22) aufweist.12. Switching shaft unit according to one of claims 1 to 11, characterized in that each cap (8; 28) has on its outside a bearing pin (8b; 28b) for mounting the switching shaft body (2; 22).
13. Schaltwelleneinheit für Schalter mit einem Schaltwellenkorper (2; 22), einem in einer Aussparung (2e; 22e) des Schaltwellenkorpers gelagerten Kontakthebel (3; 23), und einer Spannvorrichtung (6, 7; 26, 27) zur Beaufschlagung des Kontakthebels, dadurch gekennzeichnet, daß die Spannvorrichtung (7, 2d) außerhalb des den Kontakthebel (3) aufnehmenden Raumes (2e; 22e) im Inneren des Schaltwellenkorpers oder am Schaltwellenkorper (2; 22) abgedeckt, angeordnet ist.13. switching shaft unit for switches with a switching shaft body (2; 22), a contact lever (3; 23) mounted in a recess (2e; 22e) of the switching shaft body, and a tensioning device (6, 7; 26, 27) for loading the contact lever, characterized in that the tensioning device (7, 2d) outside the space (2e; 22e) receiving the contact lever (3) inside the selector shaft body or on the selector shaft body ( 2; 22) is covered, arranged.
14. Schaltwelleneinheit nach Anspruch 13, dadurch gekennzeichnet, daß die Spannvorrichtung (6, 7; 26, 27) auf zwei gegenüberliegenden Außenseiten des Schaltwellenkorpers (2) abgedeckt angeordnet ist und der Schaltwellenkorper Lagerzapfen (8f; 28f) aufweist.14. Shift shaft unit according to claim 13, characterized in that the clamping device (6, 7; 26, 27) is arranged covered on two opposite outer sides of the shift shaft body (2) and the shift shaft body has bearing journals (8f; 28f).
15. Schaltwelleneinheit nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Schaltwellenkorper (2) rotationssymmetrisch ausgebildet und die Spannvorrichtung (6, 7; 26, 27) von zwei an seinen Außenseiten fest anbringbaren, die Lagerzapfen (8f; 28f) tragenden Kappen (8; 28) abgedeckt ist . 15. selector shaft unit according to claim 13 or 14, characterized in that the selector shaft body (2) is rotationally symmetrical and the clamping device (6, 7; 26, 27) of two fixedly attachable to its outer sides, the bearing pins (8f; 28f) carrying caps ( 8; 28) is covered.
EP99941501A 1998-08-13 1999-08-02 Switch-operating lever unit for switches Expired - Lifetime EP1105902B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19836754A DE19836754B4 (en) 1998-08-13 1998-08-13 Switch shaft unit for switches
DE19836754 1998-08-13
PCT/EP1999/005570 WO2000010188A1 (en) 1998-08-13 1999-08-02 Switch-operating lever unit for switches

Publications (2)

Publication Number Publication Date
EP1105902A1 true EP1105902A1 (en) 2001-06-13
EP1105902B1 EP1105902B1 (en) 2004-02-25

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EP (1) EP1105902B1 (en)
JP (1) JP2002522888A (en)
CN (1) CN1175453C (en)
AT (1) ATE260511T1 (en)
AU (1) AU5509499A (en)
DE (2) DE19836754B4 (en)
ES (1) ES2214879T3 (en)
HU (1) HU223852B1 (en)
ID (1) ID28229A (en)
MX (1) MXPA01001497A (en)
PL (1) PL194228B1 (en)
TW (1) TW445472B (en)
WO (1) WO2000010188A1 (en)

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EP2478544B1 (en) * 2009-09-18 2015-01-14 Schneider Electric Industries SAS Single-pole cutoff unit comprising a rotary contact bridge, cutoff device comprising such a unit, and circuit breaker comprising such a device
US9953789B2 (en) 2009-09-18 2018-04-24 Schneider Electric Industries Sas Single-pole breaking unit comprising a rotary contact bridge, and a switchgear device, and circuit breaker comprising such a unit
DE102009050296A1 (en) * 2009-10-15 2011-04-21 Siemens Aktiengesellschaft Circuit breaker, especially for low voltage
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DE59908659D1 (en) 2004-04-01
AU5509499A (en) 2000-03-06
CN1316093A (en) 2001-10-03
ATE260511T1 (en) 2004-03-15
JP2002522888A (en) 2002-07-23
ID28229A (en) 2001-05-10
DE19836754A1 (en) 2000-02-17
PL194228B1 (en) 2007-05-31
CN1175453C (en) 2004-11-10
PL346042A1 (en) 2002-01-14
ES2214879T3 (en) 2004-09-16
HUP0103209A3 (en) 2002-02-28
WO2000010188A1 (en) 2000-02-24
HU223852B1 (en) 2005-02-28
HUP0103209A2 (en) 2001-12-28
MXPA01001497A (en) 2002-04-24
EP1105902B1 (en) 2004-02-25
DE19836754B4 (en) 2006-10-05
TW445472B (en) 2001-07-11

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