EP2963665B1 - Schaltvorrichtung und verbindungsmechanismus dafür - Google Patents

Schaltvorrichtung und verbindungsmechanismus dafür Download PDF

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Publication number
EP2963665B1
EP2963665B1 EP15174481.0A EP15174481A EP2963665B1 EP 2963665 B1 EP2963665 B1 EP 2963665B1 EP 15174481 A EP15174481 A EP 15174481A EP 2963665 B1 EP2963665 B1 EP 2963665B1
Authority
EP
European Patent Office
Prior art keywords
switching device
contact
contacts
moving
drive
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.)
Active
Application number
EP15174481.0A
Other languages
English (en)
French (fr)
Other versions
EP2963665A1 (de
Inventor
Song Lin Chen
Jing Huang
Chun Xiang Lu
Fang Qing Wang
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 EP2963665A1 publication Critical patent/EP2963665A1/de
Application granted granted Critical
Publication of EP2963665B1 publication Critical patent/EP2963665B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • 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
    • H01H19/02—Details
    • H01H19/03—Means for limiting the angle of rotation of the operating part
    • 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
    • H01H19/605—Angularly-movable actuating part carrying no contacts in which the actuation of the contacts depends on the direction of rotation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle

Definitions

  • the present invention relates to a switching device using a linkage mechanism.
  • a switching device e.g. an isolating switch
  • switching between an open position and a closed position is achieved by operating a drive shaft; a transmission shaft is set in motion to bring into contact or separate a moving contact point and fixed contact point, thereby controlling the switching device to close or open, in order to control the switching of a power supply line on or off.
  • a double break-point contact system can strike an arc quickly, so that the moving contact and fixed contact are not welded together, thereby increasing the switching device's ability to switch on or off, as well as its electrical lifespan.
  • An object of the present invention is to provide a switching device comprising a linkage mechanism with higher moving contact synchrony.
  • the moving contacts and connecting rods etc. on the two sides of the drive rods are in a centrosymmetric state, it is possible to ensure that the positions of the two moving contacts are the same; in other words, they can come into contact with the static contacts at the same time, and break contact with the static contacts at the same time. This means that arcs can be struck more quickly, and welding between a moving contact and a static contact can be better avoided.
  • the linkage mechanism employs four connecting rods, it generates less friction than if a crank and slider were to be employed. Therefore the movement speed of the moving contacts will also be further increased, and the faster speed will be of greater help in further increasing the arc striking efficiency.
  • the switching device further comprises two static contacts fixed to the housing, wherein the moving contact can come into contact with or be separated from one of the static contacts.
  • the switching device further comprises a limiting mechanism disposed on the housing, the limiting mechanism being capable of limiting the rotation angle of the drive rods. This allows the movement of the drive rods to be limited to within a preset range.
  • the limiting mechanism is a pair of protrusions located at two diametrically opposed sides with respect to the center.
  • the moving contacts are not in contact with the static contacts, and the drive rods are in contact with the limiting mechanism.
  • the switching device is an isolating switch.
  • a linkage mechanism of a switching device comprising a drive shaft 10 capable of rotating around a center P.
  • a pair of drive rods 10a and 10b is provided on the drive shaft 10, the two drive rods being centrosymmetric relative to the center P.
  • Moving contacts 30a and 30b which are arranged in parallel and are centrosymmetric with respect to the center point P, are also provided. These two moving contacts are fixed at one end to fixed frames 60a and 60b, respectively, and are therefore able to rotate around respective fixed pivot points.
  • connecting rods 20a and 20b which are centrosymmetric with respect to the center P.
  • These two connecting rods are each connected to one drive rod and one moving contact; in other words, the two ends of each of the connecting rods are pivotably connected to one end of the drive rod and one of the moving contacts, respectively.
  • each moving contact may comprise two parts.
  • moving contact plates 31a and 32a may sandwich fixed frame 60a and be fixed to a housing 90 by means of a pin, and sandwich connecting rod 20a by means of another pin. This gives connecting rod 20a a certain degree of freedom with respect to moving contact 30a.
  • the connecting rod Since one end of the moving contact is fixed, the connecting rod is connected to the remaining part of the moving contact; thus, one moving contact and one connecting rod form a three-connecting-rod structure. With the other end of the connecting rod being connected to a drive rod, furthermore, one moving contact, one connecting rod and one drive rod form a four-connecting-rod structure.
  • two four-connecting-rod structures are formed with the center point P as the center of symmetry (10a, 20a and the two sides of 30a; and 10b, 20b and the two sides of 30b), with the four-connecting-rod structures on the two sides being centrosymmetric relative to point P.
  • the arrangement of the fixed pivot points of the moving contacts is also centrosymmetric relative to the center. For example, one is located at the top left, while the other is located at the bottom right; of course, it is also possible to have one disposed at the bottom left, and the other disposed at the top right.
  • connecting rod mechanism makes the structure of the whole linkage mechanism simple, avoiding the problem of a complex mechanism when a crank-slider structure is used for example. Thus the whole structure is more stable and reliable, and easier to manufacture.
  • the movement speed of the moving contact is related to the arc extinguishing efficiency.
  • a slider is subject to friction when moving, leading to a reduction in the movement speed of the moving contact and other phenomena, but when the linkage mechanism provided in the embodiments of the present invention is used, this problem will not arise, so that the movement speed of the moving contact is increased, further increasing the arc extinguishing efficiency.
  • the centrosymmetric arrangement enables the two moving contacts to move in synchrony; in other words, the two moving contacts can come into contact with static contacts at the same time, and break contact with the static contacts at the same time, without a situation arising whereby the moving contact on one side has already come into contact with a static contact but the moving contact on the other side has still not come into contact with a static contact.
  • the phenomenon of welding between a moving contact and a static contact is also avoided.
  • Fig. 3 shows, when the switching device is in an OFF position, the two moving contacts are both remote from the static contacts in a manner which is centrosymmetric relative to point P.
  • the switching device needs to switch to an ON position, as shown in Fig. 4 , the drive shaft rotates anticlockwise around its center point P, thereby turning the drive rods 10a and 10b thereof, and correspondingly pushing the moving contacts 30a and 30b to move towards the static contacts 50a and 50b, until the moving contacts 30a and 30b simultaneously come into contact with the static contacts to which they respectively correspond as shown in Fig. 5 .
  • the present invention also provides a switching device, for example an isolating switch, as shown in Figs. 1 and 2 , comprising a housing 90, two static contacts 50a and 50b fixed to the housing 90, and a linkage mechanism as described above, wherein one moving contact can come into contact with or be separated from one static contact.
  • a switching device for example an isolating switch, as shown in Figs. 1 and 2 , comprising a housing 90, two static contacts 50a and 50b fixed to the housing 90, and a linkage mechanism as described above, wherein one moving contact can come into contact with or be separated from one static contact.
  • the switching device also comprises limiting mechanisms 91 and 92 disposed on the housing; the limiting mechanisms 91 and 92 limit the rotation angle of the drive rods.
  • the limiting mechanisms are a pair of protrusions located at two diametrically opposed sides with respect to the center. When the drive rods rotate to a specific angle, they will be obstructed by the protrusions, so that the possibility of further rotation is limited.
  • the switching device is in a disconnected state, the moving contacts are not in contact with the static contacts, while the drive rods are in contact with the limiting mechanisms.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Transmission Devices (AREA)

Claims (4)

  1. Schaltvorrichtung, umfassend:
    ein Gehäuse (90), und
    einen Verbindungsmechanismus, wobei der Verbindungsmechanismus umfasst:
    eine Antriebswelle (10), die zum Drehen um ihre Mitte (P) imstande ist, und ein Paar von Antriebsstangen (10a, 10b) aufweist,
    zwei bewegliche Kontakte (30a, 30b), die zum Drehen um jeweilige feststehende Drehpunkte imstande sind,
    und zwei Verbindungsstangen (20a, 20b) aufweist, die in Bezug auf die Mitte (P) zentralsymmetrisch sind, wobei die beiden Enden einer jeden der Verbindungsstangen (20a, 20b) drehbar mit einem Ende der Antriebsstange (10a, 10b) bzw. einem der beweglichen Kontakte (30a, 30b) verbunden sind,
    wobei die Schaltvorrichtung
    ferner einen Begrenzungsmechanismus (91, 92) umfasst, der auf dem Gehäuse angeordnet ist, wobei der Begrenzungsmechanismus (91, 92) zum Begrenzen des Drehwinkels der Antriebsstangen (10a, 10b) imstande ist,
    dadurch gekennzeichnet, dass
    zwei bewegliche Kontakte (30a, 30b) parallel angeordnet und in Bezug auf die Mitte (P) zentralsymmetrisch sind,
    wobei der Begrenzungsmechanismus ein Paar von Vorsprüngen (91, 92) umfasst, die an zwei diametral gegenüberliegenden Seiten in Bezug auf die Mitte (P) angeordnet sind,
    wobei, wenn die Antriebsstangen (10a, 10b) sich in einem spezifischen Winkel drehen, jede Antriebsstange (10a, 10b) durch den zugewiesenen Vorsprung gehemmt wird, so dass die Möglichkeit einer Weiterdrehung der Antriebswelle (10) begrenzt wird.
  2. Schaltvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ferner umfasst:
    zwei statische Kontakte (50a, 50b), die am Gehäuse (90) befestigt sind, wobei
    der bewegliche Kontakt (30a, 30b) mit einem der statischen Kontakte (50a, 50b) in Kontakt kommen oder davon getrennt werden kann.
  3. Schaltvorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass, wenn die Schaltvorrichtung in einem getrennten Zustand ist, die beweglichen Kontakte (30a, 30b) nicht mit den statischen Kontakten (50a, 50b) in Kontakt sind, und die Antriebsstangen (10a, 10b) mit dem Begrenzungsmechanismus in Kontakt sind.
  4. Schaltvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Schaltvorrichtung ein Trennschalter ist.
EP15174481.0A 2014-06-30 2015-06-30 Schaltvorrichtung und verbindungsmechanismus dafür Active EP2963665B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410306533.2A CN105336523B (zh) 2014-06-30 2014-06-30 切换装置及其联动机构

Publications (2)

Publication Number Publication Date
EP2963665A1 EP2963665A1 (de) 2016-01-06
EP2963665B1 true EP2963665B1 (de) 2019-02-20

Family

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Application Number Title Priority Date Filing Date
EP15174481.0A Active EP2963665B1 (de) 2014-06-30 2015-06-30 Schaltvorrichtung und verbindungsmechanismus dafür

Country Status (2)

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EP (1) EP2963665B1 (de)
CN (1) CN105336523B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107240515A (zh) * 2016-03-28 2017-10-10 西门子公司 动触头保护套及具有其的接触模块和隔离开关
CN107968004B (zh) * 2017-12-23 2020-02-07 无锡凯绎科技有限公司 通用型机械联锁装置
CN110993425A (zh) * 2019-12-31 2020-04-10 沈阳斯沃电器有限公司 一种直流隔离开关
CN211858444U (zh) * 2020-05-19 2020-11-03 施耐德电器工业公司 一种手动双电源转换开关
CN114446700A (zh) * 2021-12-22 2022-05-06 平高集团有限公司 一种双断口隔离开关

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH314121A (de) * 1953-05-27 1956-05-31 Weber Ag Drehschalter mit Nockenwelle und Tastkontakten
US4760278A (en) * 1987-07-23 1988-07-26 Thomson Robert G Transfer switch
CN101640145A (zh) * 2008-07-31 2010-02-03 阳新凤 断路器的触头系统
CN102412085B (zh) * 2010-09-20 2014-09-10 西门子公司 一种双断电触头装置以及采用该装置的隔离开关
CN203026469U (zh) * 2012-12-05 2013-06-26 上海电器股份有限公司人民电器厂 一种塑壳断路器的动触头组件
CN203434032U (zh) * 2013-09-22 2014-02-12 贵州长征开关制造有限公司 一种高速转换开关电器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
CN105336523B (zh) 2018-03-09
CN105336523A (zh) 2016-02-17
EP2963665A1 (de) 2016-01-06

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