EP0625788A2 - Dispsositif pour la commande à distance d'un commutateur électrique - Google Patents

Dispsositif pour la commande à distance d'un commutateur électrique Download PDF

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Publication number
EP0625788A2
EP0625788A2 EP94201358A EP94201358A EP0625788A2 EP 0625788 A2 EP0625788 A2 EP 0625788A2 EP 94201358 A EP94201358 A EP 94201358A EP 94201358 A EP94201358 A EP 94201358A EP 0625788 A2 EP0625788 A2 EP 0625788A2
Authority
EP
European Patent Office
Prior art keywords
gear
switch
screw
motor
coupling
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.)
Withdrawn
Application number
EP94201358A
Other languages
German (de)
English (en)
Other versions
EP0625788A3 (fr
Inventor
Fabrizio Fabrizi
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.)
BTicino SpA
Original Assignee
BTicino SpA
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
Priority claimed from IT93MI000417U external-priority patent/IT229921Y1/it
Priority claimed from IT93MI000418U external-priority patent/IT229922Y1/it
Application filed by BTicino SpA filed Critical BTicino SpA
Publication of EP0625788A2 publication Critical patent/EP0625788A2/fr
Publication of EP0625788A3 publication Critical patent/EP0625788A3/fr
Withdrawn legal-status Critical Current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
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H01H3/264—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor using a travelling nut mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/66—Power reset mechanisms
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position

Definitions

  • the present invention relates to a device for the remote actuation of an electric switch, with an electric motor and transmission means for driving a member coupled to the opening and closing mechanism of the switch.
  • Prior-art remote-actuation devices generally include electric or electromagnetic motors which act on the lever of the switch through a complex series of levers to move it from its open to its closed position or vice versa.
  • any such device should preferably be simply designed, making it both quick to assemble and economical to service.
  • an actuating device characterised in that the transmission means include a recirculating-ball lead screw arrangement as the coupling means.
  • a power switch is indicated 1
  • its operating lever is indicated 2
  • the support structure of the remote actuation device applied to the switch is indicated 3
  • a cover for the device is indicated 6.
  • a motor 4 preferably a direct-current motor, is fixed to a plate 25 rigidly fixed to the structure 3 and is coupled to a lead screw transmission member.
  • the shaft 7 of the motor is axially coupled to a screw 8, the ends of which are supported on the structure 3 by bearings 5, 10, in particular thrust bearings, and the screw 8 is coupled with a recirculating-ball nut 9.
  • a slider 11 is coupled to the nut 9 for translation and slides along a pair of guides 12 formed in the support structure 3 parallel to the axis of the screw 8 and to the direction in which the switch lever 2 moves to pass from its open to its closed position and vice versa.
  • the slider 11 has a slot 13 with a pair of pins 14 between which the lever 2 of the switch is inserted.
  • Two microswitches (shown only in Figure 1) are arranged at the upper and lower ends of one of the guides 12 to stop the motor 4 when they are engaged by the slider 11 in its travel-limit positions along the guides 12.
  • a direct current motor is chosen as the motor 4 because of its rapid response and the high torque which characterises this type of motor.
  • the recirculating-ball actuator provides an extremely compact device which is able to operate a switch remotely with a switching time of less than 100 milliseconds (in one actual case, a few tens of milliseconds).
  • the device is put into operation by the insertion of the operating lever 2 in the slot 13 in the slider 11 in such a way that the lever itself is between the pins 14 and then fixing the support structure 3 to the body of the switch with appropriate fixing means, not shown.
  • the device is ready for operation. It is supposed, for example, that the device is in the position shown in the drawings. Operation of the motor 4 rotates the screw 8 which causes the nut 9 to move upwards, carrying with it the slider 11 which in turn slides along the guides 12. The lever 2 is then engaged by the lower pin 14 and urged upwards.
  • the pins 14 are mounted idly on the slider and their presence serves to avoid friction between the lever and the slider, due to the fact that the latter has a rectilinear movement while the lever moves through an arc and there is thus relative movement between them.
  • the pins are not indispensable: in some cases direct engagement of the lever in the slider slot may be acceptable.
  • Reverse operation of the motor returns the nut downwards, returning the slider, and therefore the lever 2 of the switch, to its starting position.
  • an externally-operable mechanism is provided to act on the screw 8.
  • This mechanism includes a first bevel gear 20 securely fixed to the screw 8 and a second, smaller bevel gear 21 mounted on an arm 22 securely fixed to the plate 25 so as to be rotatable in mesh with the first gear 20.
  • the second gear has a central hexagonal hole 23 into which a key with a corresponding hexagonal section may be inserted from outside the device to enable it to be operated.
  • the actuator device includes a box structure 31 with an attachment 32 for fitting to an "OMEGA" guide, that is a guide defined by European Standards EN50022 and EN50023, and with means, not shown, for coupling to a switch mounted in a box structure similar in shape to the box structure 31 of the device.
  • an actuator which includes a motor 33, preferably a direct current motor, the shaft of which is fixed for rotation with a screw 34 along which moves a recirculating-ball nut 35.
  • a rack 36 is fixed to the nut 35 and moves, when the motor 33 is operated in one sense or the other, into one or the other of the two travel-limit positions shown in Figure 4 and Figure 5 respectively.
  • the rack 36 engages the teeth of a gear 37 mounted idly on a shaft 38 fixed to the body 31.
  • the gear has an arcuate slot 39 in which slides a shaft 40 fixed to a lever 41 pivoted on the shaft 38 and engaging, at its opposite end, the lever, indicated 42, of the switch to be actuated.
  • a spiral spring returns the gear 37 to its starting position when it is free of the rack.
  • the travel of the rack 36 is longer than the length of the rack itself so that it engages the gear only in one portion of its path, freeing itself at the end of its travel so as to free the gear which is thus returned to its starting position by the spring.
  • the motor 33 is operated to rotate the screw 34 which causes the nut 35 to move upwards.
  • the rack 36 moves with the nut and, after a brief distance of free travel, engages the teeth of the gear 37 causing it to rotate clockwise.
  • the motor is preferably stopped by means of microswitches or the like, not shown in the drawings, operated by the rack when it reaches its travel limits.
  • This embodiment has provided a remote-actuation device which is made up of few parts, which may be made in inexpensive material, for example moulded plastics, which is easy to assemble and which may be applied to the "OMEGA" guide of an ordinary electrical panel.

Landscapes

  • Transmission Devices (AREA)
EP94201358A 1993-05-19 1994-05-13 Dispsositif pour la commande à distance d'un commutateur électrique. Withdrawn EP0625788A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITMI930417 1993-03-04
ITMI930418 1993-05-19
IT93MI000417U IT229921Y1 (it) 1993-05-19 1993-05-19 Dispositivo per l'azionamento a distanza di un interruttore elettrico in particolare di un interruttore di potenza
IT93MI000418U IT229922Y1 (it) 1993-05-19 1993-05-19 Dispositivo di comando a distanza di un interruttore elettrico

Publications (2)

Publication Number Publication Date
EP0625788A2 true EP0625788A2 (fr) 1994-11-23
EP0625788A3 EP0625788A3 (fr) 1995-10-25

Family

ID=26330959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94201358A Withdrawn EP0625788A3 (fr) 1993-05-19 1994-05-13 Dispsositif pour la commande à distance d'un commutateur électrique.

Country Status (1)

Country Link
EP (1) EP0625788A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014020287A1 (fr) * 2012-08-02 2014-02-06 Hager-Electro Sas Appareil actionneur de type auxiliaire d'un appareil electrique de protection de ligne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL300256A (fr) * 1962-11-08
US3296565A (en) * 1965-01-06 1967-01-03 Gen Electric Motor-driven switch operating mechanism with indicating means
DE1690093B1 (de) * 1967-11-24 1971-10-14 Siemens Ag Motorantrieb fuer elektrische schalter mit einer auf einer spindel laufenden wandermutter
GB1443002A (en) * 1973-05-04 1976-07-21 Dorman Smith Switchgear Ltd Mounting electrical components

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014020287A1 (fr) * 2012-08-02 2014-02-06 Hager-Electro Sas Appareil actionneur de type auxiliaire d'un appareil electrique de protection de ligne
FR2994330A1 (fr) * 2012-08-02 2014-02-07 Hager Electro Sas Appareil actionneur de type auxiliaire d'un appareil de protection de ligne
CN104508788A (zh) * 2012-08-02 2015-04-08 黑格电子股份有限公司 用于保护线路的电气装置的辅助致动装置
CN104508788B (zh) * 2012-08-02 2017-05-31 黑格电子股份有限公司 用于保护线路的电气装置的辅助致动装置

Also Published As

Publication number Publication date
EP0625788A3 (fr) 1995-10-25

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