EP0651410B1 - Dispositif d'entraînement pour appareil de commutation électrique - Google Patents

Dispositif d'entraînement pour appareil de commutation électrique

Info

Publication number
EP0651410B1
EP0651410B1 EP93117704A EP93117704A EP0651410B1 EP 0651410 B1 EP0651410 B1 EP 0651410B1 EP 93117704 A EP93117704 A EP 93117704A EP 93117704 A EP93117704 A EP 93117704A EP 0651410 B1 EP0651410 B1 EP 0651410B1
Authority
EP
European Patent Office
Prior art keywords
shaft
lever
driving device
lever element
positioning element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93117704A
Other languages
German (de)
English (en)
Other versions
EP0651410A1 (fr
Inventor
Rolf Niklaus
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.)
General Electric Switzerland GmbH
Original Assignee
GEC Alsthom T&D AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEC Alsthom T&D AG filed Critical GEC Alsthom T&D AG
Priority to EP93117704A priority Critical patent/EP0651410B1/fr
Priority to DE59305652T priority patent/DE59305652D1/de
Priority to AT93117704T priority patent/ATE149734T1/de
Publication of EP0651410A1 publication Critical patent/EP0651410A1/fr
Application granted granted Critical
Publication of EP0651410B1 publication Critical patent/EP0651410B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts

Definitions

  • the present invention relates to a drive device for an electrical switching device according to the preamble of claim 1.
  • a drive device of this type for a circuit breaker is known from US Pat. No. 4,126,773.
  • a lever element sits in a rotationally fixed manner and has a certain thickness in the direction of the shaft axis.
  • the passage penetrated by the shaft in the lever element corresponds to the cross section of the shaft for mutual positive connection in the circumferential direction.
  • a fastening element made of sheet metal is pushed onto the shaft, which likewise has a passage corresponding to the cross-section of the shaft, which extends obliquely with respect to a perpendicular to the plane of the fastening element.
  • the fastening element is pulled onto the lever element by means of a screw, as a result of which it becomes stuck in the axial direction by tilting on the shaft and axially fixes the lever element on the shaft. It is extremely difficult to maintain the exact axial position of the lever on the shaft. In addition, the manufacture of the fastening element with the inclined passage is extremely complex.
  • EP-A-0 385 265 and corresponding U.S. Patent No. 4,996,397 disclose a drive device for a circuit breaker in which lever and others Elements are positively and, if necessary, pushed onto a polygonal shaft with the interposition of spacers. In the axial direction, these pushed-on elements are pressed against each other and axially fixed by screws screwed into the shaft at both ends. In this drive device, due to the axial pressing against one another, all elements seated on the shaft are connected to it in a rotationally fixed manner. For elements that can be rotated with respect to the shaft, separate bearing bushes that are non-rotatably seated on the shaft must be provided. Furthermore, the spacers increase the moving mass, which can impair the function of the drive, in particular its speed.
  • lever element Since the lever element is held in axial contact with a positioning element inserted into a groove in the shaft, its axial position with respect to the shaft is precisely defined. All required parts, such as the ring-like positioning element and screw-like clamping means, are common mass-produced articles or, like the lever element and the fastening element, can be produced easily, for example by stamping. During assembly, the lever element and the fastening element can be pushed onto the shaft in a simple manner and clamped against one another by means of clamping means, for example screws, and thus against the positioning element arranged between them. The effort for this is extremely low if the lever elements are positioned precisely.
  • the number of different parts can be kept low in a particularly preferred embodiment of the drive device according to the invention.
  • the drive device 10 shown in greatly simplified form in the figures, for an electrical switching device 12 for medium or high voltage has a shaft 14, which is rotatably mounted on a frame (not shown) of the drive device 10 and has a polygonal, in the present case square, cross section 15 , on.
  • the shaft 14 is connected to a drive element 16, for example a drive motor, a storage spring or an actuating lever, as well as optionally with generally known releasable latching and supporting devices.
  • a groove 18 running in the circumferential direction, for example through Except turning, in which an annular disk-like positioning element 20, for example a Benzing or Seeger locking ring, is inserted.
  • the width of the groove 18 in the direction of the axis 14 'of the shaft 14 essentially corresponds to the width of the positioning element 20, so that it is fixed axially on the shaft 14.
  • the groove 18 is recessed so deep in the radial direction that the remaining circular residual shaft cross section 22 has a diameter which corresponds to the side length of the square cross section 15 of the shaft 14.
  • the positioning element 22 thus projects over at least part of the circumference of the shaft 14, at least between the edges 24 of the shaft 14.
  • lever element 26 is pushed onto the shaft 14 from both ends and brought into lateral contact with the positioning element 20.
  • the lever elements 26 are punched out of a flat sheet metal strip and have a passage 28 which corresponds in shape and size at least approximately to the polygonal cross section 15 of the shaft 14, so that the lever elements 26 penetrated by the shaft 14 in the passage 28 sit on the latter in a rotationally fixed manner.
  • Seen in the longitudinal direction 26 'of the two parallel lever elements 26, these are diametrically opposed to one another with respect to the axis 14' and, seen in the radial direction, outside the positioning element 20, through which screws 30 extending parallel to the axis 14 'penetrate, with their heads 30' on one side Lever element 26 and its nuts 32 are supported on the other lever element 26.
  • the screw-nut connections form clamping means 34, by means of which the two holding elements 26 are clamped against one another and in are held axially on the positioning element 20.
  • each lever element 26 In the free end region of each lever element 26, a pivot shaft 36 is fastened to it, preferably riveted.
  • a linkage 38 is articulated to the articulation shaft 36 of the one lever element 26 and controls the moving contact 40 of the switching device 12 at the other end.
  • a generally known securing element 42 is arranged in order to hold the linkage 38 in the axial direction between itself and the relevant lever element 26.
  • lever elements 26 can be produced particularly easily and with little effort, it is advisable, as shown in the figures, to always use two lever elements 26, even if only one linkage 38 and the other lever element are articulated on the pivot shaft 36 of a single lever element 26 26 serves only as a fastening element 44 in order to serve as a support for the clamping means 34 and to hold the other lever element 26 in contact with the positioning element 20.
  • lever elements 26 are cam disks or support levers which interact with a ratchet device.
  • the cross section of the shaft 14 can have practically any non-circular shape, so that the rotationally fixed entrainment of the lever element 26 is ensured by a positive fit.
  • a first positioning element 20 is to be inserted into one of the grooves and the corresponding pair of lever elements is to be mounted.
  • a further lever element can then be pushed onto the shaft 14 so that it comes to lie between the pair of already assembled lever elements and another groove.
  • a further positioning element 20 is inserted into this groove, a further lever element is placed, and these two lever elements can then be clamped against one another by means of screws.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Transmission Devices (AREA)
  • Electronic Switches (AREA)
  • Control Of Electric Motors In General (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (6)

  1. Dispositif d'entraînement pour appareil de commutation électrique, en particulier pour la moyenne et la haute tension, comportant un arbre (14) de section polygonale, logé de manière à pouvoir tourner, un élément formant levier (26) et un élément de fixation (44) qui présentent chacun un orifice (28) correspondant sensiblement à la section (15) de l'arbre (14), orifice par lequel est introduit mécaniquement l'arbre (14) suivant la direction circonférentielle, et comportant des moyens de serrage (34) destinés à serrer l'un par rapport à l'autre l'élément formant levier (26) et l'élément de fixation (44) suivant la direction de l'axe de l'arbre (14') et à maintenir l'élément formant levier (26), dans la direction axiale, contre l'arbre (14), caractérisé en ce que l'arbre (14) présente une rainure (18), s'étendant suivant la direction circonférentielle, dans laquelle est montée un élément de positionnement (20) de forme annulaire dépassant par rapport à l'arbre (14), suivant la direction radiale, au moins sur une partie du pourtour de l'arbre, et en ce que l'élément formant levier (26) et l'élément de fixation (44) sont chacun disposés sur une face de l'élément de positionnement (20) et sont maintenus, au moyen de l'élément de serrage (34), contre l'élément de positionnement (20) suivant la direction axiale.
  2. Dispositif d'entraînement suivant la revendication 1, caractérisé en ce que l'élément de fixation (44) est constitué par un deuxième élément formant levier (26).
  3. Dispositif d'entraînement suivant la revendication 2, caractérisé en ce que les éléments formant levier (26) sont réalisés de manière identique.
  4. Dispositif d'entraînement suivant l'une des revendications 1 à 3, caractérisé en ce que l'élément de positionnement (20) est un anneau de retenue type Seeger ou circlip.
  5. Dispositif d'entraînement suivant l'une des revendications 1 à 4, caractérisé en ce que le moyen de serrage (34) présente des vis (30, 32), de préférence opposées diamétralement par rapport à l'axe de l'arbre (14').
  6. Dispositif d'entraînement suivant l'une des revendications 1 à 5, caractérisé en ce que l'élément formant levier (26) et l'élément de fixation (44) sont découpés à la matrice à partir d'une tôle.
EP93117704A 1993-11-02 1993-11-02 Dispositif d'entraînement pour appareil de commutation électrique Expired - Lifetime EP0651410B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP93117704A EP0651410B1 (fr) 1993-11-02 1993-11-02 Dispositif d'entraînement pour appareil de commutation électrique
DE59305652T DE59305652D1 (de) 1993-11-02 1993-11-02 Antriebseinrichtung für ein elektrisches Schaltgerät
AT93117704T ATE149734T1 (de) 1993-11-02 1993-11-02 Antriebseinrichtung für ein elektrisches schaltgerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93117704A EP0651410B1 (fr) 1993-11-02 1993-11-02 Dispositif d'entraînement pour appareil de commutation électrique

Publications (2)

Publication Number Publication Date
EP0651410A1 EP0651410A1 (fr) 1995-05-03
EP0651410B1 true EP0651410B1 (fr) 1997-03-05

Family

ID=8213388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93117704A Expired - Lifetime EP0651410B1 (fr) 1993-11-02 1993-11-02 Dispositif d'entraînement pour appareil de commutation électrique

Country Status (3)

Country Link
EP (1) EP0651410B1 (fr)
AT (1) ATE149734T1 (fr)
DE (1) DE59305652D1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156479B (de) * 1960-11-21 1963-10-31 Licentia Gmbh Antriebswelle fuer Hochspannungsschalter
US4131381A (en) * 1977-11-21 1978-12-26 Alberts Albert K Means and method for mounting a structure on a shaft
US5134256A (en) * 1990-11-02 1992-07-28 G & W Electric Company Puffer interrupter switch
DE4038766A1 (de) * 1990-12-05 1992-06-11 Abb Patent Gmbh Kuppelelement

Also Published As

Publication number Publication date
EP0651410A1 (fr) 1995-05-03
ATE149734T1 (de) 1997-03-15
DE59305652D1 (de) 1997-04-10

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