EP0224433B1 - Mécanisme de commande pour un disjoncteur à basse tension avec une roue à rochet - Google Patents

Mécanisme de commande pour un disjoncteur à basse tension avec une roue à rochet Download PDF

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Publication number
EP0224433B1
EP0224433B1 EP86730182A EP86730182A EP0224433B1 EP 0224433 B1 EP0224433 B1 EP 0224433B1 EP 86730182 A EP86730182 A EP 86730182A EP 86730182 A EP86730182 A EP 86730182A EP 0224433 B1 EP0224433 B1 EP 0224433B1
Authority
EP
European Patent Office
Prior art keywords
lever
blocking lever
ratchet wheel
blocking
drive mechanism
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
EP86730182A
Other languages
German (de)
English (en)
Other versions
EP0224433A1 (fr
Inventor
Ulrich Ing. Marquardt (Grad.)
Ralf Ing. Seebold (Grad.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0224433A1 publication Critical patent/EP0224433A1/fr
Application granted granted Critical
Publication of EP0224433B1 publication Critical patent/EP0224433B1/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
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3063—Decoupling charging handle or motor at end of charging cycle or during charged condition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/11—Tripping mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/20672—Lever engaging rack

Definitions

  • the invention relates to a drive device for a low-voltage circuit breaker with a ratchet wheel to be rotated step by step by means of a transport pawl for tensioning an energy store, a cam wheel connected to the ratchet wheel when the energy store is tensioned by a blocking lever and a latching device in an over-center position with regard to the force attack of the energy store on the
  • the ratchet wheel can be locked against further rotation.
  • a drive device of this type is known, for example, from US-A-3 301 984. Regardless of the type of actuation of the ratchet wheel, there is the difficulty in such drive devices that further introduction of force into the ratchet wheel must be avoided when the energy store reaches the end position, because otherwise there is a risk of damage to parts of the drive device. If, for example, the transport pawl of the ratchet wheel is actuated by a motor drive, a special control of the motor is required to ensure that, on the one hand, the energy store is fully charged and, on the other hand, the motor does not continue to run beyond this operating point, so that the motor, associated transmission parts and the like The ratchet wheel and the transport pawl are not damaged. Analogously, the same problem exists with the rotation of the ratchet wheel by means of a transport ratchet which can be driven by hand, because forces which lead to damage can also be exerted by carelessly operating an actuating handle.
  • the invention has for its object to provide a reliable protective device against excessive stress on the drive device when reaching the tensioned end position of the drive device.
  • the blocking lever and the transport pawl can be brought into direct connection with one another by the transport pawl being provided with a driver bolt which interacts with the stop surface of the blocking lever and serves as an abutment for a pressure spring for the transport pawl. At the same time, this eliminates the need for a special pressure spring for the blocking lever.
  • the stop surface of the blocking lever can be designed as a component of a recess that extends over the driver of the transport pawl. In this way, the pivoting angle of the transport pawl is restricted in a desired manner.
  • a smooth movement sequence when lifting the transport pawl can be achieved in that the working surface of the cam wheel which interacts with the blocking lever is arranged at an angle which causes a wedge-like engagement on the blocking lever.
  • the adjustment of the blocking lever from its rest position into the locking position is therefore not sudden, but proportional to the angular rotation of the ratchet wheel or the cam wheel. Accordingly, the movement of the transport pawl is controlled depending on the path.
  • This sequence of movements can also be contributed by the fact that the pawl lever can be pivoted by the blocking lever against the action of gravity, thereby protecting the pawl nose and the locking member.
  • control disk can have a radial step and a control curve rising from the bottom of the step to the circumferential surface, starting from an arc-shaped circumferential surface, while the control lever has a nose which interacts with the step.
  • a sudden operation of the switch in the supply circuit of the motor is achieved.
  • Simple switches without their own step function can therefore be used without disadvantage.
  • FIG. 1 shows a drive device of a low-voltage circuit breaker with adjacent parts of the switch in a side view.
  • FIG. 2 parts that are hidden in FIG. 1 are shown in a view perpendicular to FIG. 1.
  • FIG. 3 shows in a view similar to FIG. 2, but in a different plane, further parts of the drive device, a blocking lever being shown in section.
  • the drive device 1 shown in FIGS. 1 and 2 is used for sudden switching on of schematically shown contact arrangements 2, which can be actuated by the drive device 1 with the interposition of a switch lock 3, also shown schematically, via a switching shaft 4.
  • a switch lock 3 also shown schematically, via a switching shaft 4.
  • an energy store is tensioned in a manner to be described, which is shown schematically in FIG. 1 as a compression spring 5.
  • This can also be a group of compression springs or an equivalent arrangement of tension springs. Since the drive devices of low-voltage power switches are to be designed in such a way that the contact arrangements 2 can be securely closed even in the event of a short circuit, the energy store must be able to store an adequate energy supply; accordingly, it is necessary to provide a high force for tensioning the energy storage device.
  • a ratchet wheel 6 which is to be transported step by step, in conjunction with a crank arm rocker 7 and a fixedly mounted two-arm rocker 8, one end of which is articulated to the crank rocker 7 and the other end of which engages a guide rod 9 for tensioning the compression spring 5.
  • a cage 12 On both sides of the toothing 11 of the ratchet wheel 6, a cage 12 is mounted on its wheel body, which is formed from two parallel support plates 13 and bolts 14 connecting them.
  • the cage 12 has an extension 15 on which a push rod 16 and a return spring 17 engage.
  • the push rod 16 serves to transmit a reciprocating movement to the cage 12 by means of a motor drive 20 shown schematically.
  • a transport pawl 21 which can be pivoted about a bearing pin 19 in the support plates 13 of the cage 12 stands with its nose 22 with the toothing 11 of the ratchet wheel 6 engaged so as to convert the rotary movement of the motor drive 20 into a stepwise rotation of the ratchet wheel 6 in the direction of the arrow 60 and a corresponding stepwise tension of the compression spring 5.
  • a stationary holding pawl 23 is likewise held in engagement with the toothing 11 by means of a return spring 24 and prevents the ratchet wheel 6 from rotating backwards during the tensioning process.
  • a blocking lever 25 in connection with a latching device, which prevents further rotation of the ratchet wheel 6 as soon as it has exceeded its dead center position with respect to the force applied by the tension spring 5.
  • the blocking lever 25 is pivotally mounted in a hanging position about a fixed bearing pin 26 and can be placed against a fixed stop 27 under the action of gravity.
  • a working surface 29 which cooperates with a working surface 30 of a cam wheel 10 connected to the ratchet wheel 6, this working surface 30 being arranged at a greatly inclined position with respect to a radial line (angle 37 in FIG. 1). This results in a wedge-like interaction between the working surface 30 of the cam wheel 10 and the nose 28 of the blocking lever 25 such that the blocking lever 25 does not suddenly, but in the course of a certain angle of rotation (arrow 60) of the cam wheel 10 from that shown in FIG Rest position against the action of gravity is pivoted about the bearing pin 26 in the direction of arrow 31.
  • the blocking lever 25 is thus transferred to a blocking position in which a pawl lever 32 provided with a roller 33 and a nose 34 bears against a blocking element designed as a half-shaft 35.
  • the blocking lever 25 cooperates with a shoulder 36 facing away from the ratchet wheel 6 with the roller 33.
  • the pawl lever 32 is pivotably arranged about a bearing pin 40 in an approximately horizontal position, when it is moved into the blocking position, not only the effect of a return spring 41 but also the force of gravity must be overcome. In conjunction with the wedge-like interaction of the working surface 30 of the cam wheel 10 with the nose 27 of the blocking lever 25, this leads to a smooth movement sequence which is gentle on all interacting parts.
  • the blocking lever 25 is provided with a recess 42 into which a driver pin 43 of the transport pawl 21 projects.
  • the drive pin is acted upon by a spiral spring 44 with a restoring force which holds the ratchet lever in engagement with the toothing 11.
  • the recess 42 is dimensioned such that the transport pawl 21 can carry out the movements required for the gradual further rotation of the ratchet wheel 6 in the circumferential direction as well as in the radial direction with the rest position of the blocking lever 25 unchanged.
  • control disk 46 which is connected to the cam wheel 10 or the Klineknrad 6. Starting from a circular arc-shaped circumferential surface 47, the control disk 46 has a radially inwardly extending step 50, which is followed by a curve 51 rising up to the radius of the circumferential surface 47.
  • a control lever 53 which is pivotably mounted about a pin 52 about the ratchet wheel 6 is provided with a nose 54 which interacts with the control disk 46. Furthermore, the control lever 53 is connected in an articulated manner to an actuating rod 55 which actuates one or more auxiliary switches, of which a motor switch 56 is shown in FIG. 1.
  • This switch is closed in the position shown, so that the supply circuit of the motor drive can be closed by means of a control switch.
  • the ratchet wheel 6 is then gradually transported in the direction of the arrow 60 until the blocking lever 25 becomes effective.
  • the control disc 46 and the control lever 53 are assigned to each other so that when the end position of the cam wheel 10 is reached, the radial step 50 of the control disc 46 arrives at the nose 54 of the control lever 53 and thus the control lever in the course of a very slight angular expansion of the Control disk 46 can pivot about its bearing (bolt 52).
  • This pivoting movement is transmitted by means of the actuating rod 55 to the motor switch 56, which interrupts the circuit of the motor drive 20.
  • other position-dependent processes can be triggered, e.g. B. can be operated a mechanical display element on a control panel of the circuit breaker.
  • control lever 53 is returned to the starting position shown by means of the curve 51.
  • the control lever can be applied to the peripheral surface of the control disk 46 by a pressing force; the pressure force can be applied by a separate spring or the restoring force of the components to be actuated.
  • the cage 12 has, in addition to the extension 15, a further extension 61 with an arcuate slot 62 for the pin 63 of a drive rod 64.
  • This drive rod is in turn provided with an arcuate slot 65 at its opposite end, into which a pin 66 one engages at 67 mounted manual control lever 70.
  • the cage 12 for tensioning the compression spring 5 can move by means of the motor drive 20 without influencing the manual actuation lever 70.
  • the motor drive 20 is at rest, the ratchet wheel 6 can also be transported step by step by means of the actuating handle 70 and the drive rod 52, the cage 12 and the transport pawl 21 in turn serving for power transmission.
  • the manual control lever 70 is inevitably rendered ineffective when the blocking lever 25 has reached its locked position in the end position of the cam wheel 10 and the transport pawl 21 is thereby lifted out of the toothing 11.

Landscapes

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

Claims (7)

1. Mécanisme de commande (1) pour un disjoncteur de puissance à basse tension, comprenant une roue à rochet (6) devant être tournée pas à pas par un cliquet d'avancement (21) en vue de l'armement d'un accumulateur d'énergie (5), dans lequel une came (10) reliée à la roue à rochet (6) peut être verrouillée à l'égard d'une rotation dans le sens de la détente de l'accumulateur d'énergie (5), lorsque l'accumulateur d'énergie (5) est armé, par un levier de blocage (25) et un dispositif d'accrochage (32; 34, 35) à une position audelà du point mort, vis-à-vis de l'attaque des forces de l'accumulateur d'énergie (5) à la roue à rochet (6), caractérisé en ce que le levier de blocage (25) est monté oscillant entre une position de repos et une position de verrouillage, la came (10) et le levier de blocage (25) possèdent des faces actives (28; 30) qui coopèrent dans le sens de l'amenée du levier de blocage (25) à la position de verrouillage, et le levier de blocage présente une surface de butée (42) pour dégager le cliquet d'avancement (21) de la denture (11) de la roue à rochet (6).
2. Mécanisme selon la revendication 1, caractérisé en ce que le cliquet d'avancement (21) possède une tige d'entraînement (43) qui coopère avec la surface de butée (45) du levier de blocage (25) et sert de contre-appui à un ressort presseur (44) pour le cliquet d'avancement (21).
3. Mécanisme selon la revendication 2, caractérisé en ce que la surface de butée (45) fait partie d'un évidement (42) ménagé dans le levier de blocage (25) et entourant l'élément d'entraînement (43) du cliquet d'avancement (21).
4. Mécanisme selon la revendication 1, caractérisé en ce que la face active (30) de la came (10), coopérant avec le levier de blocage (25), est disposée sous un angle (37) produisant l'attaque à la façon d'un coin du levier de blocage (25).
5. Mécanisme selon la revendication 4, caractérisé en ce que le dispositif d'accrochage (32, 34, 35) du levier de blocage (25) comprend un levier d'encliquetage (32) destiné à être basculé à l'encontre de la pesanteur à partir d'une position de repos et à être appliqué par un nez d'encliquetage (34) contre un organe de verrouillage (35).
6. Mécanisme selon une des revendications précédentes, caractérisé en ce qu'il comprend une came de commande (46) reliée à la roue à rochet (6), ainsi qu'un levier de commande (53), coopérant avec la surface périphérique de la came de commande, pour la manoeuvre d'un interrupteur (56) se trouvant dans le circuit d'alimentation d'une commande à moteur (30).
7. Mécanisme selon la revendication 6, caractérisé en ce que la came de commande (46) présente, à partir d'une surface périphérique (47) en arc de cercle, un gradin radial (50) et une rampe (51) qui monte depuis la base du gradin (50) jusqu'à la surface périphérique (47), et que le levier de commande (53) présente une saillie (54) coopérant avec la périphérie de la came de commande (46).
EP86730182A 1985-11-18 1986-11-05 Mécanisme de commande pour un disjoncteur à basse tension avec une roue à rochet Expired - Lifetime EP0224433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853541093 DE3541093A1 (de) 1985-11-18 1985-11-18 Antriebsvorrichtung fuer einen niederspannungs-leistungsschalter mit einem klinkenrad
DE3541093 1985-11-18

Publications (2)

Publication Number Publication Date
EP0224433A1 EP0224433A1 (fr) 1987-06-03
EP0224433B1 true EP0224433B1 (fr) 1990-02-07

Family

ID=6286414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730182A Expired - Lifetime EP0224433B1 (fr) 1985-11-18 1986-11-05 Mécanisme de commande pour un disjoncteur à basse tension avec une roue à rochet

Country Status (3)

Country Link
US (1) US4742200A (fr)
EP (1) EP0224433B1 (fr)
DE (2) DE3541093A1 (fr)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
JPH0648720Y2 (ja) * 1987-06-25 1994-12-12 三菱電機株式会社 回路しゃ断器の電気操作装置
US4899022A (en) * 1988-10-11 1990-02-06 Siemens Energy & Automation, Inc. Stored energy operating mechanism charging handle and cover assembly
US5004875A (en) * 1988-10-11 1991-04-02 Siemens Energy & Automation, Inc. Stored energy contact operating mechanism
US4901821A (en) * 1988-10-13 1990-02-20 Siemens Energy & Automation, Inc. Motor operator for a stored energy operating mechanism
GB2247569A (en) * 1990-08-30 1992-03-04 Mk Electric Ltd Energy storage device/ circuit breaker assembly
DE4110043A1 (de) * 1991-03-27 1992-10-01 Kloeckner Moeller Gmbh Motorantrieb fuer elektrische schaltgeraete, insbesondere leistungsschalter
CH682431A5 (de) * 1991-09-10 1993-09-15 Sprecher Energie Ag Federkraftspeicherantrieb.
US5224590A (en) * 1991-11-06 1993-07-06 Westinghouse Electric Corp. Circuit interrupter having improved operating mechanism
US5274206A (en) * 1992-04-28 1993-12-28 Westinghouse Electric Corp. Spring charging mechanism for circuit breakers and transfer switches
US5397868A (en) * 1993-09-28 1995-03-14 Eaton Corporation Transfer switch
US5422453A (en) * 1993-09-28 1995-06-06 Eaton Corporation Handle actuator for a circuit interrupter handle
US5475190A (en) * 1994-04-15 1995-12-12 Eaton Corporation Operator of a handle or toggle of a switch
DE4416106A1 (de) * 1994-04-20 1995-10-26 Siemens Ag Spannvorrichtung für einen Federspeicher
JP3644187B2 (ja) * 1997-04-17 2005-04-27 三菱電機株式会社 遮断器の蓄勢装置
DE19803968A1 (de) * 1998-01-23 1999-07-29 Siemens Ag Spanneinrichtung für einen Energiespeicher eines Niederspannungs-Leistungsschalters
US6072137A (en) * 1999-03-29 2000-06-06 Siemens Energy & Automation, Inc. Pinion gear carrier assembly for a stored energy circuit breaker operator assembly
DE102006006907A1 (de) * 2006-02-09 2007-08-16 Siemens Ag Anordnung insbesondere zum Betätigen einer Transportklinke und Spannvorrichtung für einen Federspeicher eines elektrischen Schalters mit einer derartigen Anordnung
US8319133B2 (en) * 2010-11-02 2012-11-27 Eaton Corporation Electrical switching apparatus and charging assembly therefor
DE102021201524B4 (de) 2021-02-17 2024-06-27 Siemens Aktiengesellschaft Vorrichtung zum Spannen eines Energiespeichers und Verfahren zum Spannen eines Energiespeichers

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US3301984A (en) * 1965-03-02 1967-01-31 Ite Circuit Breaker Ltd Spring closed circuit breaker
US3600540A (en) * 1969-11-06 1971-08-17 Westinghouse Electric Corp Motor-operated spring-closing circuit breaker
US3689721A (en) * 1971-09-16 1972-09-05 Westinghouse Electric Corp Circuit breaker including ratchet and pawl spring charging means and ratchet teeth damage preventing means
US3944772A (en) * 1974-10-18 1976-03-16 Westinghouse Electric Corporation Circuit breaker with low torque motor
US4162385A (en) * 1976-09-30 1979-07-24 Westinghouse Electric Corp. Dual spring circuit interrupter apparatus
US4095676A (en) * 1976-11-23 1978-06-20 Howe-Yin Research Co., Inc. Stored energy operation for breakers
US4167988A (en) * 1978-06-20 1979-09-18 General Electric Company Ratcheting mechanism for circuit breaker motor operator
US4228690A (en) * 1979-08-06 1980-10-21 Emhart Industries, Inc. Drive and clutch for a timing mechanism
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JPS59189519A (ja) * 1983-04-12 1984-10-27 富士電機株式会社 しや断器操作用蓄勢器の駆動装置

Also Published As

Publication number Publication date
DE3669011D1 (de) 1990-03-15
EP0224433A1 (fr) 1987-06-03
DE3541093A1 (de) 1987-05-21
US4742200A (en) 1988-05-03

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