EP0003967A1 - Dispositif de loquet pour un interrupteur de puissance - Google Patents

Dispositif de loquet pour un interrupteur de puissance Download PDF

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Publication number
EP0003967A1
EP0003967A1 EP79100351A EP79100351A EP0003967A1 EP 0003967 A1 EP0003967 A1 EP 0003967A1 EP 79100351 A EP79100351 A EP 79100351A EP 79100351 A EP79100351 A EP 79100351A EP 0003967 A1 EP0003967 A1 EP 0003967A1
Authority
EP
European Patent Office
Prior art keywords
bearing
journal
narrow
locking tab
bearing opening
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
EP79100351A
Other languages
German (de)
English (en)
Other versions
EP0003967B1 (fr
Inventor
Werner Troebel
Klaus-Dieter Habedank
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 EP0003967A1 publication Critical patent/EP0003967A1/fr
Application granted granted Critical
Publication of EP0003967B1 publication Critical patent/EP0003967B1/fr
Expired 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

Definitions

  • the invention relates to a latching arrangement for electrical circuit breakers with a pawl and a cooperating with this, by means of two on a common ideal axis bearing journals in bearing openings fixed parts rotatably or pivotally mounted locking tab, in which the cross section of the bearing journal is rectangular and each one of the narrow surfaces of the trunnions can be subjected to the force to be latched.
  • a latching arrangement of this type is known, for example, from US Pat. Nos. 3,178,535 and 3,796,980.
  • the bearing opening has the shape of a square with two surfaces that are at an angle to one another.
  • the resulting approximately cutting-like mounting of the locking tab can be produced by simple, mechanically feasible cutting processes and is consequently suitable for switching devices to be produced in large numbers.
  • the location tion of the locking tab is, however, only relatively lightly loadable, because high specific stresses occur at the edges of the narrow surface of the bearing journals, which lead to rapid wear.
  • the force curve depends on the number of switching cycles.
  • the invention has for its object to provide a storage for a latching arrangement of the type mentioned, which can also be produced only by mechanical cutting processes, which works with little wear with the least possible bearing friction and whose force required for triggering changes only little during the course of use of the circuit breaker.
  • each bearing journal is opposed by a convex curved surface of the associated bearing opening and both long surfaces of each bearing journal are each matched by a likewise convex surface of the bearing opening.
  • the locking tab is rotated or pivoted to release the pawl, then a rolling and sliding movement takes place between the bearing journal and the associated bearing opening, from which the edges of the bearing journal are excluded.
  • suitable dimensioning of the radii of curvature of the convex surfaces particularly low specific loads can be achieved.
  • the material of the bearing journal and the counter surfaces of the bearing opening is protected in such a way that the bearing tolerance and the force required for triggering do not change in a disruptive manner over the required number of switching operations.
  • each bearing pin can face a concavely curved surface of the bearing opening. This gives a slight play of the journal in the direction of the long surfaces of the rectangular cross section.
  • the fact that in this arrangement the edges of the one narrow side of the bearing pin lie against the concave surface is of less importance for the durability of the arrangement, because the forces acting in the direction of the concave surface are substantially less than those in the opposite direction from forces exerted on the pawl.
  • the opposite surface of the bearing opening which faces the further narrow surface of each bearing journal, can also be formed from two partial surfaces connected at an angle to one another and by a transition arch. In this way, a low-play storage of the locking tab can be achieved even with a relatively large swivel angle.
  • Figure 1 shows an electrical circuit breaker schematically in section.
  • FIG. 2 shows a bearing part for a locking tab that is to be fixed in the housing of the circuit breaker.
  • Figures 3 and 4 show an enlarged view of two differently designed bearing openings.
  • a locking tab is shown separately in FIG. 5; the front view of a bearing journal is shown in FIG. 6.
  • FIG. 7 is an enlarged illustration of a bearing opening with a bearing pin engaging in it in different switching positions.
  • the circuit breaker 1 shown in FIG. 1 has an insulating housing 2 made of a molded material, which is divided into a top part 4 and a bottom part 5 along a parting line 3.
  • the current path of the circuit breaker 1 extends from a connection device 6 via a fixed contact piece 7 and a movable contact piece 10 and via a flexible conduction band 11 to a further connection device 12.
  • the fixed contact piece 7 and the movable contact piece 10 are in a quenching chamber 13 in a known manner arranged.
  • the connection of the bimetallic strip 15 and the magnet armature 16 to the trigger shaft 14 is not shown separately.
  • the trigger shaft 14 is connected to a locking tab 17, the projection 20 of which serves as an abutment for a pawl 21 of the switch lock of the circuit breaker 1.
  • the circuit breaker 1 has an operating handle 22 which projects through an opening in the upper part 4 of the housing 2.
  • the actuating handle 22 is connected to a drive lever 23 which actuates a toggle lever system 24 which engages the connecting joint 25 of the movable contact piece 10 with a contact piece carrier 26.
  • a switching shaft 27 transmits the movement of the contact piece carrier 26 to adjacent pole paths of the circuit breaker 1, not shown. From the switch-on position shown, the movable switch piece 10 can be moved into the switch-off position by moving the actuating handle 22 in the direction of arrow 28. The pawl 21 and the locking tab 17 remain in the illustrated Position.
  • the locking tab 17 is pivoted clockwise and the pawl 21 is released.
  • the support 30 of the toggle lever system 24 is thereby canceled, so that the contact piece carrier 25 and thus the movable contact piece 10 are also pivoted clockwise into the switch-off position.
  • the actuating handle 22 assumes an intermediate position between the switch-on position shown and the switch-off position not shown, as a result of which it can be seen that the switch has been triggered (TRIP position).
  • FIG. 2 shows an example of a bearing part used to support the locking tab 17.
  • the bearing part 31 is a stamped part made of sheet metal, which is provided with a multiplicity of bearing openings and surfaces, as are required for storing the various movable parts of the thermal and magnetic triggers.
  • the bearing part 31 is in a suitable manner with the lower part 5 of the housing 2 z. B. connected by screws.
  • An identical bearing part is also fastened in the lower part 5 in a parallel position, whereby two aligned bearing points arranged at a distance are created for the parts to be stored.
  • a bearing opening for the locking tab 17 is designated 32.
  • An overlying bearing surface 33 is provided for the trigger shaft 14.
  • the enlarged illustration of the bearing opening 32 in FIG. 3 shows that in the case of a generally elongated shape, two longer surfaces 34 and 35 provided with convex curvatures face each other and that one of the narrower surfaces 36 is also convexly curved.
  • the surface 37 opposite the surface 36 is concavely curved.
  • the convex curvature of the longer surfaces 34 and 35 is not uniform over the entire Length distributed, but so unevenly that the narrowest point of the bearing opening is about 2/3 of the height of the bearing opening 32. The transition between all the areas mentioned is rounded.
  • a bearing opening 40 there are again convexly shaped longer surfaces 41 and 42 and also a convexly curved, narrower surface 43.
  • the surface 44 opposite this is divided into two approximately straight partial surfaces 45 and 46, which are connected by a transition surface 47.
  • the partial surfaces 45 and 46 are at an acute angle to one another.
  • the position of the most curved areas 48 and 49 of the long surfaces 41 and 42 is also different from the example according to FIG. 3. These areas are not opposite one another, but are offset approximately in such a way that the most curved area 48 of the surface 41 is located approximately at half the height of the bearing opening 40, while the most curved region 49 of the surface 42 is arranged at approximately 2/3 to 3/4 of the height of the bearing opening 40. This asymmetry is matched to the intended angular positions of the bearing pin of the locking member engaging in the bearing opening, as will be explained.
  • the bearing pins of the locking tab 17, as can be seen in FIG. 5, have a rectangular cross section.
  • the two journals 50 lie on an axis which represents the axis of rotation or pivoting of the locking tab.
  • FIG. 7 shows an enlarged view of a bearing opening corresponding to the bearing opening 40 (FIG. 4) and a bearing journal ′ that engages in the bearing opening, the individual surfaces of which are designated in FIG. 6.
  • the bearing 50 takes the position shown in solid lines in the closed position of the circuit breaker 1 a.
  • the bearing journal lies with its upper narrow surface 51 on the convex surface 43 and with its right long / surface 53 on the right convex surface Area 41.
  • a slight sliding movement occurs between the bearing journal and the surface 43.
  • the left long surface 54 lies against the convex surface 42.
  • the dotted position shown results of the - warehouses pin 50.
  • first there occurs a sliding on the surface 43 and a rolling surface on the 41st Then, with further sliding on the surface 43, the bearing journal 50 lies against the opposite surface 42.
  • the dash-dotted position of the bearing pin results when the actuating handle 22 is reset to prepare for reclosure (RESET position).
  • the lower narrow surface 52 passes from the partial surface 45 to the partial surface 46, which is associated with sliding. The forces acting in the direction of these surfaces do not change the properties in the ON position.
  • the left long surface 54 of the journal 50 bears in the RESET position on the left convex surface 42.

Landscapes

  • Breakers (AREA)
EP79100351A 1978-03-07 1979-02-07 Dispositif de loquet pour un interrupteur de puissance Expired EP0003967B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2810233 1978-03-07
DE2810233A DE2810233C2 (de) 1978-03-07 1978-03-07 Verklinkungsanordnung für elektrische Leistungsschalter

Publications (2)

Publication Number Publication Date
EP0003967A1 true EP0003967A1 (fr) 1979-09-19
EP0003967B1 EP0003967B1 (fr) 1981-04-29

Family

ID=6033989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100351A Expired EP0003967B1 (fr) 1978-03-07 1979-02-07 Dispositif de loquet pour un interrupteur de puissance

Country Status (4)

Country Link
US (1) US4274069A (fr)
EP (1) EP0003967B1 (fr)
JP (1) JPS54125477A (fr)
DE (1) DE2810233C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035693A1 (fr) * 1980-03-06 1981-09-16 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Mécanisme de commutation pour appareils d'installation électrique
WO1986000751A1 (fr) * 1984-07-14 1986-01-30 Licentia Patent-Verwaltungs-Gmbh Verrou de commutation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553929B1 (fr) * 1983-10-21 1986-08-01 Merlin Gerin Mecanisme de commande d'un disjoncteur multipolaire basse tension
CN113975560A (zh) 2015-03-31 2022-01-28 费雪派克医疗保健有限公司 用于将气体供应至气道的用户接口和系统
CA3033581A1 (fr) 2016-08-11 2018-02-15 Fisher & Paykel Healthcare Limited Conduit pliable, interface patient et connecteur de casque
JP6960172B2 (ja) * 2019-03-20 2021-11-05 テンパール工業株式会社 回路遮断器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1217357A (fr) * 1958-01-02 1960-05-03 Thomson Houston Comp Francaise Perfectionnements aux disjoncteurs à commande manuelle ou automatique
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
DE2337058A1 (de) * 1972-07-31 1974-02-14 Westinghouse Electric Corp Selbstschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
FR1217357A (fr) * 1958-01-02 1960-05-03 Thomson Houston Comp Francaise Perfectionnements aux disjoncteurs à commande manuelle ou automatique
DE2337058A1 (de) * 1972-07-31 1974-02-14 Westinghouse Electric Corp Selbstschalter
US3796980A (en) * 1972-07-31 1974-03-12 Westinghouse Electric Corp Disposable circuit breaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035693A1 (fr) * 1980-03-06 1981-09-16 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Mécanisme de commutation pour appareils d'installation électrique
WO1986000751A1 (fr) * 1984-07-14 1986-01-30 Licentia Patent-Verwaltungs-Gmbh Verrou de commutation
US4825183A (en) * 1984-07-14 1989-04-25 Licentia Patent-Verwaltungs Gmbh Switch latch

Also Published As

Publication number Publication date
DE2810233B1 (de) 1979-03-08
DE2810233C2 (de) 1979-10-18
JPS54125477A (en) 1979-09-28
US4274069A (en) 1981-06-16
EP0003967B1 (fr) 1981-04-29

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