EP0278894A1 - Interverrouillage mécanique pour interrupteurs électriques - Google Patents

Interverrouillage mécanique pour interrupteurs électriques Download PDF

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Publication number
EP0278894A1
EP0278894A1 EP88730006A EP88730006A EP0278894A1 EP 0278894 A1 EP0278894 A1 EP 0278894A1 EP 88730006 A EP88730006 A EP 88730006A EP 88730006 A EP88730006 A EP 88730006A EP 0278894 A1 EP0278894 A1 EP 0278894A1
Authority
EP
European Patent Office
Prior art keywords
opening
locking
carriage
arm
ball
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
EP88730006A
Other languages
German (de)
English (en)
Other versions
EP0278894B1 (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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp 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.
  • Locking devices are already known which are arranged between two switching devices, for example contactors, mounted next to one another and which are mechanically connected to the movable parts of both switching devices. In this case, a lock for one of the switching devices is effective when the other is switched on. It is therefore not possible to switch on both switching devices simultaneously and thereby cause a short circuit, for example, if the two switching devices are part of the reversing circuit of a three-phase motor.
  • Such a locking device is known, for example, from US-A-4 409 575.
  • It essentially has a cage to be arranged between the contactors for a rolling element, which is displaced by the movable contact carrier of one contactor in the direction of the other contactor and thereby sits under the contact carrier of the other contactor, which consequently cannot come into its switched-on position.
  • 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 can also be connected to the switching devices in a simple manner, since the support bracket offers the possibility of an uncomplicated connection to the supporting structure of the switching devices offers and the sled act as actuation and locking elements without tilting.
  • the balls provided in the locking device described above can be normal steel balls, such as those used for ball bearings.
  • a displaceable guide can be provided for the first ball in such a way that the ball enters the opening of the locking arm of the second slide and thereby blocks it against movement as soon as the first slide is moved from the first position into the second position; a corresponding guide is then provided for the second ball in such a way that it enters the opening of the locking arm of the first slide and blocks it against movement as soon as the second slide is moved from the first position into the second position.
  • This 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 element for connecting the locking block to the support bracket, the longitudinal beams being connected by a cross member, which connects the contains openings mentioned 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 actuating 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. So spill over the sledge fork-like the cross part of the locking block and are guided by this 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 the first ball has, so that the first ball can only enter the opening of the locking arm of the first slide by a certain distance, while the majority of the first ball in the first opening of the cross part of the locking block remains and thereby prevents movement of the first carriage relative to the cross part.
  • the opening of the actuating arm of the first carriage and the opening of the actuating arm of the second carriage can have a funnel-like opening on their side facing the cross member of the locking block and a subsequent opening part with a smaller diameter than the diameter of the balls, such that when the Actuating arm the associated ball is pushed in the direction of the opening of the cross member. It is thus possible, by suitable selection of the diameter of the balls and the angle of the funnel-shaped bevel, to bring about a displacement of the balls with as little travel of the slide as possible and thereby to enable the locking to take effect.
  • 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 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, 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 preferably a stepped opening with a first, at a lower height sensitive 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 60; that happens when opening 60 and 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 such that the actuating arm 72 aligns 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 in its actuating arm 74 a stepped opening 90 with a first smaller opening part 92 and a larger, slanted or funnel-like opening part 94.
  • a clutch arm 78 the task of which will be explained.
  • the second carriage 30 is slidable 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 28 are not aligned with one another are.
  • the first and second balls 32 and 34 are located essentially in the openings of the first and second locking blocks and fall into the corresponding openings of the actuating arms or merely extend into them. 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.
  • 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 is caused to protrude beyond the transverse part 54 of the locking block 26, where it detects the opening 96 of the locking arm 76 of the second carriage 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.
  • the first contactor is prevented from closing by the upward movement of the second ball 34 into engagement with the opening 96 of the lock arm 76 of the slider 30.
  • each vacuum contactor 12 or 14 has, in a known manner, a support structure 80 which offers a simple possibility for fastening the foot parts 36 and 38 of the support bracket 22.
  • the coupling arms 68 and 78 of the carriages 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 cross 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 as is 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)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
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 true EP0278894A1 (fr) 1988-08-17
EP0278894B1 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)

Country Link
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1569713A (en) * 1921-09-10 1926-01-12 Automatic Transporation Compan Controller
DE1447403A1 (de) * 1964-02-01 1968-10-31 Starkstrom Schaltgeraetefabrik Mechanische Verriegelung fuer zwei Bauteile
US4409575A (en) * 1980-08-07 1983-10-11 Tokyo Shibaura Denki Kabushiki Kaisha Electromagnetic contactor

Family Cites Families (6)

* 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
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1569713A (en) * 1921-09-10 1926-01-12 Automatic Transporation Compan Controller
DE1447403A1 (de) * 1964-02-01 1968-10-31 Starkstrom Schaltgeraetefabrik Mechanische Verriegelung fuer zwei Bauteile
US4409575A (en) * 1980-08-07 1983-10-11 Tokyo Shibaura Denki Kabushiki Kaisha Electromagnetic contactor

Also Published As

Publication number Publication date
EP0278894B1 (fr) 1992-10-07
DE3875129D1 (de) 1992-11-12
US4739672A (en) 1988-04-26

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