EP0955657A1 - Mécanisme de serrure pour disjoncteur - Google Patents

Mécanisme de serrure pour disjoncteur Download PDF

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Publication number
EP0955657A1
EP0955657A1 EP99810344A EP99810344A EP0955657A1 EP 0955657 A1 EP0955657 A1 EP 0955657A1 EP 99810344 A EP99810344 A EP 99810344A EP 99810344 A EP99810344 A EP 99810344A EP 0955657 A1 EP0955657 A1 EP 0955657A1
Authority
EP
European Patent Office
Prior art keywords
lever
intermediate piece
switching
corners
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99810344A
Other languages
German (de)
English (en)
Inventor
Martin Vix
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.)
Schurter AG
Original Assignee
Schurter 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 Schurter AG filed Critical Schurter AG
Publication of EP0955657A1 publication Critical patent/EP0955657A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/635—Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the present invention relates to a switch lock for an electrical circuit breaker with two switch positions on both sides of a zero position, which in particular has a multipole design and can be used, for example, as a motor protection switch with the switch positions "off", "forward” or "reverse”.
  • the invention provides a switch lock for a circuit breaker at the beginning mentioned type created, the features of which are specified in claim 1.
  • the key switch according to the invention is characterized above all by a minimum of parts and by the fact that it can be mounted from only one direction. The so-called free trip is guaranteed. Conversely, switching on is not possible as long as the key switch or its latch lever is not latched.
  • FIG. 1 shows an exploded view of a three-pole electrical circuit breaker, which can be used in particular as a motor protection switch, with two switch positions on both sides of a zero position.
  • the zero position preferably corresponds to the off position of the circuit breaker and the two switch positions on both sides of the zero position two Switch-on positions, for example in the sense of forward and reverse running of a connected electric motor.
  • the circuit breaker has a modular structure on several levels one above the other.
  • 1 denotes a lower housing part in the form of a flat, open shell. Arranged in this are three double switch contacts 2 which can be switched between a middle open position and two on positions arranged on either side thereof.
  • the lower housing part 1 houses a unit 3 which is used to detect the switch contacts 2 in the two on positions flowing currents, which serves between these existing voltages and for the generation of control voltages from these quantities.
  • a switching rod 4 which is displaceable in its longitudinal direction and also carries parts of the switching contacts 2 is also arranged in the housing part 1. By shifting the switching rod 4, the switching contacts 2 can be brought from a middle open position into two on positions arranged on both sides thereof.
  • a switching lock designated overall by 6, is arranged in a further housing part 5, which is also designed as an open top shell.
  • the circuit breaker 1 is closed at the top by a cover plate 8.
  • the cover plate 8 can be screwed to the upper housing part 5 by means of screws 9 and this can be screwed to the lower housing part 2, all parts of the circuit breaker 1 being fixed.
  • the circuit breaker 1 is completely from above, i.e. Can be assembled from one direction.
  • an actuating button 11 protrudes upward (outside), which is part of a rotary lever 12 of the key switch 6.
  • the rotary lever 12 is in the lid opening 10 via the actuating head 11 and thus overall fixed to the housing (rotary lever axis).
  • the rotary lever 12 can be pivoted by hand via the actuating button 11.
  • a pin 14 of a triangular intermediate piece 15 In rotary engagement with a hole 13 in the rotary lever 12 is a pin 14 of a triangular intermediate piece 15, which in turn engages in an approximately trapezoidal recess 16 in a shift lever 17, pivotable therein.
  • the shift lever 17 is provided with a pin 18 which is rotationally engaged with a hole 19 in a ratchet lever 20.
  • the pawl lever 20 has a cam 21, which rests in a recess 22 of a leaf spring 23, which is arranged in a stationary manner in the upper housing part 5 in a manner not shown.
  • a molding 24 directed against the undervoltage relay 7 on the pawl lever 20 forms, together with the armature 25 of the undervoltage relay 7, a pawl arrangement which can be latched when the armature 25 is attracted or is held in the latched state and unlatched when the armature 25 falls.
  • the pawl lever 20 In the unlatched state, the pawl lever 20 is free to pivot its cam 21 (pawl lever axis) resting in the recess 22 of the leaf spring 23. This pivotability is blocked in the latched state. In this state, the latch lever 20 can move somewhat against the action of the leaf spring 23 in a longitudinal direction designated by 26 away from the rotary lever axis 11.
  • the shift lever 17 engages with a connecting cam 27 of the shift rod 4 which projects upward into the upper housing part 5 in such a way that it can pivot relative to the latter and also shift somewhat in the longitudinal direction 26.
  • the shift rod 4 can be displaced in the lower housing part 11 in its longitudinal direction and thus transversely with respect to the longitudinal direction 26.
  • the shift rod 4, its cam 27 or the upper end of the shift lever 17 is further acted upon by two springs 28 and 29 which are directed against each other in their action, which are supported on the housing 5 and push the shift rod 4 into a zero position (FIGS. 2 and 4).
  • the zero position the double switching contacts 2 in the lower housing part are in an open position and, starting from this position, can be closed in one direction or the other by shifting the switching rod 4 laterally.
  • FIGS. 6 show the switch lock 6 in a position which corresponds to the zero position of the circuit breaker 1 and Figures 3 and 5 in positions which correspond to the two switch positions of the circuit breaker 1 on both sides of the zero position. Accordingly, in FIGS. 2 and 4, the rotary head 11 or the shift lever 12 is oriented vertically in the direction of the longitudinal direction 26 and in FIGS. 3 and 5 with respect to this direction 26 to the right (FIG. 3) or to the left (FIG. 5) panned.
  • the shift lever 12, the intermediate piece 15, the shift lever 17 and the ratchet lever 20 are flat parts, which in the two shift positions on both sides of the zero position in some cases. transfer leverage even differently.
  • the respectively effective levers are shown in the form of lines 31-34 in FIGS. 2-5.
  • the triangular intermediate piece 15 which is articulated at its tip to the rotary lever 12 (bearing 13/14), with its base 35 on the base 36 of the trapezoidal recess in the shift lever 17 and projects with it two lower, rounded corners 37 and 38 into correspondingly rounded corners 39 and 40 of the recess 16.
  • the corners 37, 38 of the intermediate piece 15 can alternatively be rotated in the corners 39, 40 of the recess 16.
  • the intermediate piece or its momentarily active lever 32 exerts pressure on the lower left corner 39 of the trapezoidal recess 16 in gear lever 17/33 and also forces it to move with it.
  • the shift lever 17/33 does this on the one hand by pivoting to the left around the bearing 18/19, taking the shift rod 4 against the action of the second spring 28; on the other hand, the shift lever 17/33 temporarily dodges against the action of the first spring 23 with its lower end (bearing 18/19).
  • the first spring 23 supports the further rotation, which is ultimately limited by the fact that the left side leg 42 of the triangular intermediate piece 15 strikes the left side leg 43 of the trapezoidal recess 16.
  • This position is shown in FIG. 3.
  • the switch rod 4 is shifted to such an extent that the double switch contacts shown in FIG. 1 and designated by 2 are in one of their two mentioned on-positions.
  • lever chain 31-34 runs over the lower right corner 38 of the triangular intermediate piece 15 or the lower right corner 40 of the trapezoidal recess 16 in the shift lever 17. Its effective lever arm 33 extends between the bearing 18/19 and these corners 38/40 .
  • the triangular intermediate piece 15 strikes, this time with its right side leg 44 on the right side leg 45 of the trapezoidal recess 16.
  • the intermediate piece 15 in the above-described embodiment has an alternative function with respect to the two switching positions of FIGS. 3 and 5.
  • the intermediate piece 15 forms a toggle lever with two ends, which are formed by the two lower corners 37 and 38.
  • the two corners 37 and 38 again represent bearing axles.
  • the two corners 37 and 38 must not be firmly connected to the shift lever 17.
  • this is ensured by the loose engagement of the two corners 37 and 38 described in the lower corners 39, 40 of the trapezoidal recess 16 in the shift lever 17.
  • the double function of the intermediate piece 15 and the special way in which it interacts with the shift lever 17 advantageously saves on parts which would otherwise be required to implement the same functionality. This contributes to a simple and inexpensive construction of the entire lock construction.
  • the shape of the intermediate piece (15) and the recess (16) are concerned, they do not have to be strict are triangular or trapezoidal. It is sufficient if the mutual shapes are matched to one another in such a way that the function explained above is realized. In particular, it does not matter how the upper edge of the recess is designed in the figures. It is also not necessary to lay the base or the side legs of both parts flat. The intermediate piece could therefore also be star-shaped, for example. Finally, of course, the shift lever could also intervene, for example, in a recess in the intermediate piece. The same applies to the other connections of the functional elements described.
  • Fig. 6 shows the key switch 6 in a trigger position, as e.g. is reached in the event of a fault from the switching position shown in FIG. 3 under the drive of the tensioned second spring 28.
  • the switch rod 4 can be seen to be pushed back by the spring 28 in the direction of its zero position according to FIG. 3, at least to the extent that the switch contacts 2 acted upon by it could open.
  • This shifting of the 4 was made possible by bypassing the toggle lever locking described and without rotating the rotary lever 12/31 (free release) by releasing the latch 24/25 of the latch lever 20/34. This releases the pawl lever 20/34 to pivot its cam 22, which in turn enables the shift lever 17/33 to yield to the pressure of FIG.
  • FIG. 7 shows specific designs of the rotary lever 12 and of the ratchet lever 20 such that the rotary lever 12 extends up to the ratchet lever 20 and is in contact with a convex radius 46 on a concave radius 47 of the ratchet lever 20.
  • the two radii 46, 47 are designed such that the latch lever 20, if it e.g. as pivoted in Fig. 6, when turning the rotary lever 12 e.g. 6, also forcibly pivoted into its neutral pivot position according to FIG. 2 or FIG. 4, in which it can be latched again.
  • the corresponding formations on the rotary lever 12 and on the ratchet lever 20 can be offset relative to the shift lever 17 and the intermediate piece 15, in the illustration of FIG. 1, in particular be arranged in a plane above these elements. In FIGS. 2-6 they are simply omitted in favor of the better visibility of the shift lever 17 and the intermediate piece 15.
  • FIG. 7 also shows a possible type of latching of the latch lever 20, the armature 48 of an undervoltage relay 49 being directly part of the latching.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Lock And Its Accessories (AREA)
EP99810344A 1998-05-08 1999-04-23 Mécanisme de serrure pour disjoncteur Withdrawn EP0955657A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH104298 1998-05-08
CH104298 1998-05-08

Publications (1)

Publication Number Publication Date
EP0955657A1 true EP0955657A1 (fr) 1999-11-10

Family

ID=4201110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810344A Withdrawn EP0955657A1 (fr) 1998-05-08 1999-04-23 Mécanisme de serrure pour disjoncteur

Country Status (4)

Country Link
US (1) US6127909A (fr)
EP (1) EP0955657A1 (fr)
JP (1) JP2000011847A (fr)
BR (1) BR9902070A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300740B6 (cs) * 2002-09-16 2009-07-29 Oez S.R.O. Zarízení pro rucní ovládání a blokování spínacích prístroju, zejména jisticu
JP4760898B2 (ja) * 2008-12-02 2011-08-31 富士電機機器制御株式会社 回路遮断器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2131800A (en) * 1937-01-11 1938-10-04 William H Frank Circuit breaker
US3406360A (en) * 1967-04-05 1968-10-15 Simons Samuel Brian Protector switch
US3752947A (en) * 1972-07-27 1973-08-14 Ite Imperial Corp Auxiliary mechanism for operating handle of circuit breaker
US4048599A (en) * 1974-04-19 1977-09-13 Elektra Tailfingen Ammann & Cie Electric switching device
EP0703592A1 (fr) * 1994-09-20 1996-03-27 Magneti Marelli France Commutateur électrique pour l'alimentation des feux de position d'un véhicule automobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500630A (en) * 1994-10-13 1996-03-19 Square D Company Solid state overload relay mechanism
FR2739487B1 (fr) * 1995-09-28 1997-10-31 Schneider Electric Sa Dispositif de commande et de signalisation pour appareil de protection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2131800A (en) * 1937-01-11 1938-10-04 William H Frank Circuit breaker
US3406360A (en) * 1967-04-05 1968-10-15 Simons Samuel Brian Protector switch
US3752947A (en) * 1972-07-27 1973-08-14 Ite Imperial Corp Auxiliary mechanism for operating handle of circuit breaker
US4048599A (en) * 1974-04-19 1977-09-13 Elektra Tailfingen Ammann & Cie Electric switching device
EP0703592A1 (fr) * 1994-09-20 1996-03-27 Magneti Marelli France Commutateur électrique pour l'alimentation des feux de position d'un véhicule automobile

Also Published As

Publication number Publication date
JP2000011847A (ja) 2000-01-14
BR9902070A (pt) 2000-02-01
US6127909A (en) 2000-10-03

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