EP0278894B1 - Interverrouillage mécanique pour interrupteurs électriques - Google Patents

Interverrouillage mécanique pour interrupteurs électriques Download PDF

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Publication number
EP0278894B1
EP0278894B1 EP88730006A EP88730006A EP0278894B1 EP 0278894 B1 EP0278894 B1 EP 0278894B1 EP 88730006 A EP88730006 A EP 88730006A EP 88730006 A EP88730006 A EP 88730006A EP 0278894 B1 EP0278894 B1 EP 0278894B1
Authority
EP
European Patent Office
Prior art keywords
opening
slide
ball
arm
actuating arm
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
EP88730006A
Other languages
German (de)
English (en)
Other versions
EP0278894A1 (fr
Inventor
John D. Kleinecke
Thomas R. Little
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 EP0278894A1 publication Critical patent/EP0278894A1/fr
Application granted granted Critical
Publication of EP0278894B1 publication Critical patent/EP0278894B1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/32—Latching movable parts mechanically
    • H01H50/323—Latching movable parts mechanically for interlocking two or more relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20238—Interlocked

Definitions

  • the invention relates to a mechanical locking device for electrical switching devices, which serves to ensure the actuation of only one of two switching devices at a time.
  • a device of this type is already known (US-A-1 569 713) which is used to lock the tap changer of an electric vehicle with respect to the direction switch.
  • a ball serves as the locking element, which is displaceable in an opening of a stationary part which is adapted to its diameter and can in each case partly dip into recesses of counterparts which are connected to the step switch or the direction switch.
  • the speed switch can only be operated, d. H. can be moved from its rest position to one of the speed levels when the direction switch is outside its zero position.
  • the direction switch can only be moved to its zero position when the speed switch is in the zero position.
  • the invention has for its object to provide a locking device working with a ball, which is particularly suitable for vacuum contactors.
  • the problem with these switching devices is that the locking device must be effective even with very short relative displacements, because the drive movement has only short distances.
  • Such a locking device consists of only a few parts, which are relatively easy to manufacture due to their flat shape or are available as standard parts. It is also easy to connect to the switching devices, since the support bracket offers the possibility of an uncomplicated connection to the support structure of the switching devices and the slides act as canting and actuating elements.
  • the balls to be used can be normal steel balls as used for ball bearings.
  • the mentioned guide can be realized in an advantageous manner by a locking block of H-shaped cross section, which has two longitudinal beams, each with at least one opening for receiving a connecting member for connecting the locking block to the support bracket, the longitudinal beams being connected by a cross member, which contains the mentioned openings for the first and the second ball.
  • An advantageously simple guidance of the two carriages can be achieved in that the actuating arm of the first carriage and the actuating arm of the second carriage are arranged on one side of the connecting part of the H-shaped locking block and that the blocking arm of the first carriage and the blocking arm of the second Carriage are on the other side of the cross member and the operating arm of the first carriage and the locking arm of the second Carriage are aligned with each other, and the locking arm of the first carriage and the actuating arm of the second carriage are also aligned with each other.
  • the carriage overlap the cross part of the locking block in a fork-like manner and is guided so that it can be moved in a straight line.
  • the locking device operates with as little play as possible in order to ensure the desired safety.
  • This property can be promoted by suitable dimensioning of the diameters of the different openings.
  • the opening of the locking arm of the first slide can have a smaller diameter than that of the second ball, so that the second ball can only enter the opening of the locking arm of the first slide by a certain distance, while the majority of the second ball in the second opening of the cross part of the locking block remains and thereby prevents movement of the first carriage relative to the cross part.
  • the new locking device is particularly suitable for use with vacuum contactors that have a short travel distance for their drive parts.
  • Assembling the locking device with the vacuum contactors can preferably be done so that the support bracket of the locking device is connected at its ends to the support structure of a vacuum contactor and that the vacuum contactors are arranged with mutually facing pivotable drive levers, actuating members of the carriage being articulated to the ends of the drive levers.
  • the articulated connection because the swivel angle of the drive lever when switching on and off is extremely small.
  • FIG. 1 shows a side view of an arrangement with two vacuum contactors and a locking device arranged between the vacuum contactors.
  • Figures 2, 3 and 4 show a bracket of a locking device in perpendicular views.
  • Figures 5, 6 and 7 show a locking block of a locking device also in three mutually perpendicular views.
  • FIGS. 8, 9 and 10 A first carriage of a locking device is again shown in FIGS. 8, 9 and 10 in three views perpendicular to one another.
  • FIGS. 11, 12 and 13 a second slide is shown in FIGS. 11, 12 and 13.
  • FIGS. 14 and 15 serve to explain the interaction of the slide shown in FIGS. 8, 9 and 10 and 11, 12 and 13 with the locking block according to FIGS. 5, 6 and 7.
  • FIG. 14 shows the non-actuated rest position of the parts
  • FIG. 15 a blocking position is shown.
  • FIG. 1 shows a device arrangement 10 with a first vacuum contactor 12 and a second vacuum contactor 14, each of which comprises a drive lever 16 or 18, which moves depending on the opening and closing of the vacuum contactor.
  • the drive parts 16 and 18 can pivot about bearing points 94 and 96 and convert the movement at their connection point with a mechanical locking device 20 into a lateral movement.
  • the mechanical locking device 20 comprises a support bracket 22, a cover plate 24, a locking block 26 and first and second slides 28 and 30.
  • the locking device has a first ball 32 and a second ball 34.
  • FIGS. 2 to 4 show that the support bracket 22 has essentially the shape of a "U", the end parts of the "U” being bent outwards by approximately 90 ° relative to the legs.
  • base parts 36 and 38 are formed, which can be provided with holes or openings 40, 42 in order to fasten the support bracket 22 to the frame of the vacuum contactor.
  • the bracket also has a number of openings 44 in the central portion at the bottom of the "U".
  • the support bracket 22 is preferably made of a metal such as sheet steel or a copper alloy, but it can also be made of another solid and durable material.
  • the locking block 26 has a first and a second opening 48 or 50 and a number of further openings 52 which can be made to coincide with the openings 44 of the mounting bracket. These openings have a size and design that is sufficient to accommodate fasteners, e.g. B. bolts or screws.
  • the locking block 26 is approximately H-shaped with two upright longitudinal beams 84 and a cross member 54, which has the first and second openings 48 and 50, respectively.
  • the longitudinal beams 84 contain openings 52 which are used to connect the locking block 26 to the bracket 22 and the cover plate 24.
  • the first opening 48 of the locking block 26 is dimensioned such that the ball 32 can move freely through the opening 48.
  • the second opening 50 of the locking block 26 has a diameter such that the second ball 34 can also move freely vertically.
  • vertical movement is meant here that the balls can move in a direction parallel to the longitudinal beams 84 of the locking block 26 and in a direction perpendicular to the cross member 54.
  • the openings 48 and 50 of the locking block 26 are preferably aligned side by side between the upright members of the H-arrangement, as will be explained in more detail.
  • the first carriage 28 has an actuating arm 60 with an opening 62 and a blocking arm 64 with an opening 66.
  • the first carriage 28 also has a coupling arm 68 and one or more openings 70 for receiving Screw on as an abutment of one or more springs 72.
  • the actuating arm 60 is at a lower height than the locking arm and is located on the opposite part of the vertical part 68.
  • the actuating arm 60 and the locking arm 64 are vertically separated by a distance that is slightly larger than the thickness of the cross member 54 of the locking block 26.
  • the first carriage 28 can grip the locking block in such a way that the locking arm 64 is above the cross member 54 and the actuating arm 60 is below the cross member 54.
  • This construction enables the opening 62 of the actuating arm of the first carriage 28 to receive the first ball 32 through the opening 48 of the locking block 26.
  • the opening 62 is a stepped opening with a first one located at a lower height Opening part 86 with a smaller diameter and second opening part 88 arranged at a higher height with a larger diameter than the opening part at the lower height.
  • the larger opening portion 88 has a diameter that is larger than the diameter of the first ball 32 so that the carriage 28 can move when the ball 32 rests in the opening 62; this happens when the opening 62 and the opening 48 are aligned. As shown, the larger opening portion 88 is funnel-shaped toward the smaller opening portion 86 to form a ramp.
  • the first carriage 28 is displaceable relative to the locking block 26 between a first position in which the opening 62 of the actuating arm 60 and the opening 48 of the locking block 26 are aligned with one another and a second position in which the opening 62 of the actuating arm 60 and the first Opening 48 of the locking block 26 are not aligned.
  • the second carriage 30 is constructed similarly, with the exception that the lateral position of the actuating arm 72 and the locking arm 76 are selected so that the actuating arm 72 is aligned with the space which is adjacent to the actuating arm 60 of the first carriage 28 and below of the locking arm 64, while the locking arm 76 is aligned in the space to the side of the locking arm 64 of the first slide 28 and above the actuating arm 60. In this way, the first and the second slide 28 and 30 interlock.
  • the second slide 30 has a stepped opening 90 in its actuating arm 74 with a first smaller opening part 92 and a larger, slanted or funnel-like opening part 94.
  • a coupling arm 78 the task of which will be explained.
  • the second carriage 30 is displaceable between a first position in which the opening 74 of the actuating arm and the opening 50 of the locking block 26 are aligned with one another and a second position in which the opening 74 of the actuating arm and the opening 50 of the locking block 26 are not aligned with one another are.
  • the first and second balls 32 and 34 are located substantially in the openings of the first and second carriages and fall into or merely extend into the corresponding openings of the actuating arms. If the parts are properly assembled and aligned in the vacuum contactor, this corresponds to the open position of each vacuum contactor. If the first vacuum contactor 12 is closed, the movable part 16 is displaced by the closing movement, which acts on the first carriage 28 and moves it from the first to the second position. In the first position, the openings are aligned and the balls are at the lowest point. In the second position, the openings are not aligned, which means that the ball is pushed upwards by the funnel-like opening part 88 of the actuating arm 60.
  • the ball 32 By the upward movement the ball 32 is caused to protrude over the transverse part 54 of the locking block 26, where it detects the opening 96 of the locking arm 76 of the second slide 30. This prevents the second carriage 30 from moving and consequently prevents the second vacuum contactor 14 from closing. If the second vacuum contactor closes first, the reverse effect occurs. When the second contactor closes first, the first contactor is prevented from closing by the upward movement of the second ball 34 into engagement with the opening 66 of the locking arm 64 of the carriage 28.
  • each vacuum contactor 12 or 14 has, in a known manner, a supporting structure 80 which offers a simple possibility for fastening the foot parts 36 and 38 of the supporting bracket 22.
  • the coupling arms 68 and 78 of the slides 28 and 30 are articulated to the ends of the drive levers 16 and 18, with very little requirement being imposed on the degree of articulation because the pivot bearings 16 and 18 are relatively far from the coupling arms and the swivel angle of the drive lever is only small.
  • FIG. 14 both carriages 28 and 30 are shown together with the transverse part 54 of the locking block 26 in the basic position or in the rest position, which corresponds to the switch-off position of both vacuum contactors 12 and 14.
  • FIG. 15 shows a locking position in which the slides 28 and 30 are displaced relative to one another by means of the coupling arms 68 and 78.
  • the ball 32 is shifted upwards in FIG. 15, so that it is partially in the opening 48 of the cross member 54 and partially is located in the opening 96 of the locking arm 76.
  • the carriage 30 and thus the drive lever 18 are thereby blocked.
  • the ball 34 rests unchanged in the larger opening part 94 of the actuating arm 74.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Claims (5)

  1. Dispositif de verrouillage mécanique (20) pour des appareils de commutation électrique, présentant les caractéristiques suivantes :
    a) un étrier de support (22), une plaque de fermeture (24) et un bloc de verrouillage (26) disposé entre l'étrier de support et la plaque de fermeture et comportant une première ouverture (48) et une seconde ouverture (50) ainsi qu'une première bille (32) disposée de manière à être déplaçable dans la première ouverture (48) du bloc de verrouillage (26), et une seconde bille (34) disposée de manière à être déplaçable dans la seconde ouverture (50) du bloc de verrouillage (26), et en outre des moyens pour relier la plaque de fermeture (24) et le bloc de verrouillage (26) à l'étrier de support (22);
    b) un premier coulisseau (28) comportant un bras de manoeuvre (60) et une ouverture (62) ménagée dans ce bras et servant à loger une première bille (32) et un bras de blocage (64) comportant une autre ouverture (66), le premier coulisseau (28) étant déplaçable entre deux positions, et l'ouverture (62) du bras de manoeuvre (60) et la première ouverture (48) du bloc de verrouillage (26) étant alignées l'une sur l'autre, dans la première position, alors que dans la seconde position, l'ouverture (62) du bras de manoeuvre (60) n'est pas alignée sur la première ouverture (48) du bloc de verrouillage (26);
    c) un second coulisseau (30) comportant un bras de manoeuvre (74) et une ouverture (92) ménagée dans ce bras et servant à loger la seconde bille (34), et un bras de blocage (76) comportant une ouverture (96), le second coulisseau (30) étant déplaçable entre deux positions et, dans la première position, l'ouverture (92) du bras de manoeuvre et la seconde ouverture (50) du bloc de verrouillage (26) étant alignées l'une sur l'autre, alors que, dans la seconde position, l'ouverture (92) du bras de manoeuvre (74) n'est pas alignée sur la seconde ouverture (50) du bloc de verrouillage (26);
    d) l'ouverture (62) du bras de manoeuvre (60) du premier coulisseau (28) et l'ouverture (90) du bras de manoeuvre (74) du second coulisseau (30) possèdent, sur leur face tournée vers le bloc de verrouillage (26), un élément d'ouverture (88 ou 94) qui s'élargit en forme d'entonnoir, et une partie d'ouverture adjacente (86 ou 92) possédant un diamètre inférieur au diamètre des billes (32 ou 34) de sorte que, lors d'un déplacement du bras de manoeuvre (60 ou 76), la bille associée (32 ou 34) est refoulée en direction de l'ouverture (48 ou 50) du bloc de verrouillage (54);
    e) la première bille (32) pénètre dans l'ouverture (90) du bras de blocage (76) du second coulisseau (30) et bloque de ce fait ce dernier contre tout déplacement dès que le premier coulisseau (28) est repoussé de la première position dans la seconde position, et la seconde bille (34) pénètre dans l'ouverture (66) du bras de blocage (64) du premier coulisseau (28) et bloque ce dernier contre un déplacement dès que le second coulisseau (30) est déplacé de la première position dans la seconde position.
  2. Dispositif de verrouillage suivant la revendication 1, caractérisé par le fait que le bloc de verrouillage (26) possède une section transversale en forme de H et comporte deux longerons (84), qui présentent chacun au moins une ouverture (52) destinée à loger un élément de liaison servant à raccorder le bloc de verrouillage (26) à l'étrier de support (22), et que les longerons (84) sont raccordés entre eux par un élément transversal (54), qui comporte les ouvertures (48 ou 50) pour la première bille (32) ou la seconde bille (34).
  3. Dispositif de verrouillage suivant la revendication 2, caractérisé par le fait que le bras de manoeuvre (60) du premier coulisseau (28) et le bras de manoeuvre (74) du second coulisseau (30) sont disposés d'un côté de l'élément de liaison (54) du bloc de verrouillage en forme de H (26) et que le bras de blocage (64) du premier coulisseau (28) et le bras de blocage (76) du second coulisseau (30) sont disposés sur l'autre côté de l'élément transversal (54), le bras de manoeuvre (60) du premier coulisseau (28) et le bras de blocage (76) du second coulisseau (30) étant alignés l'un sur l'autre, et le bras de blocage (64) du premier coulisseau (28) et le bras de manoeuvre (74) du second coulisseau (30) étant également alignés l'un sur l'autre.
  4. Dispositif de verrouillage suivant la revendication 2, caractérisé par le fait que l'ouverture (66) du bras de blocage (64) du premier coulisseau (28) possède un diamètre inférieur au diamètre de la seconde bille (34), en sorte que la seconde bille (34) pénètre seulement partiellement dans l'ouverture (66) du bras de blocage (64) du premier coulisseau (28), tandis que la majeure partie de la seconde bille (34) reste dans la seconde ouverture (50) de l'élément transversal (54) du bloc de verrouillage (26) et empêche de ce fait un déplacement du premier coulisseau (28) par rapport à l'élément transversal (54).
  5. Dispositif de verrouillage suivant une ou plusieurs des revendications précédentes, caractérisé par le fait que l'étrier de support (22) est relié, au niveau de ses extrémités (36,38), à l'unité de support (80) respectivement d'un contacteur à vide (12, 14), et que les contacts sous vide sont équipés de leviers d'entraînement pivotants (16,18), tournés l'un vers l'autre, les bras d'accouplement (68,78) des coulisseaux (28,30) étant raccordés, selon une liaison articulée, aux extrémités des leviers d'entraînement (16,18).
EP88730006A 1987-01-15 1988-01-13 Interverrouillage mécanique pour interrupteurs électriques Expired - Lifetime EP0278894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4368 1987-01-15
US07/004,368 US4739672A (en) 1987-01-15 1987-01-15 Mechanical interlock for a vacuum contactor

Publications (2)

Publication Number Publication Date
EP0278894A1 EP0278894A1 (fr) 1988-08-17
EP0278894B1 true EP0278894B1 (fr) 1992-10-07

Family

ID=21710450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730006A Expired - Lifetime EP0278894B1 (fr) 1987-01-15 1988-01-13 Interverrouillage mécanique pour interrupteurs électriques

Country Status (3)

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US (1) US4739672A (fr)
EP (1) EP0278894B1 (fr)
DE (1) DE3875129D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9005102U1 (de) * 1990-05-02 1991-09-05 Siemens AG, 8000 München Mechanische Verriegelungseinrichtung für Schütze mit einem Schieber
US5481075A (en) * 1994-03-11 1996-01-02 Toshiba International Corporation Compact motor controller with an improved arrangement for disconnecting and withdrawing a drawout unit
CN101017963B (zh) * 2006-12-29 2012-05-02 浙江正泰电器股份有限公司 一种机械互锁式接触器装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1407458A (en) * 1921-06-27 1922-02-21 Arthur V Berry Gear-shift-locking mechanism
US1569713A (en) * 1921-09-10 1926-01-12 Automatic Transporation Compan Controller
US1607270A (en) * 1924-11-10 1926-11-16 Smith Arthur Ervin Multiple-circuit-control interlocking switch
US2351485A (en) * 1940-12-09 1944-06-13 Borg Warner Control device
DE1447403B2 (de) * 1964-02-01 1971-03-11 Starkstrom Schaltgeratefabrik E Spindler & O Deissler, 5277 Rodt Mechanische verriegelung fuer zwei gegeneinander verschieb bare bauteile
CA794603A (en) * 1964-05-25 1968-09-17 P. Conner John Mechanical interlock
US3622719A (en) * 1970-03-27 1971-11-23 Gen Electric Mechanical interlock
US3842689A (en) * 1972-02-15 1974-10-22 Volvo Penta Ab Multiple station control system
US4409575A (en) * 1980-08-07 1983-10-11 Tokyo Shibaura Denki Kabushiki Kaisha Electromagnetic contactor

Also Published As

Publication number Publication date
US4739672A (en) 1988-04-26
EP0278894A1 (fr) 1988-08-17
DE3875129D1 (de) 1992-11-12

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