EP1914771B1 - Closing spring assembly of switching mechanism for air circuit breaker - Google Patents

Closing spring assembly of switching mechanism for air circuit breaker Download PDF

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Publication number
EP1914771B1
EP1914771B1 EP07019929A EP07019929A EP1914771B1 EP 1914771 B1 EP1914771 B1 EP 1914771B1 EP 07019929 A EP07019929 A EP 07019929A EP 07019929 A EP07019929 A EP 07019929A EP 1914771 B1 EP1914771 B1 EP 1914771B1
Authority
EP
European Patent Office
Prior art keywords
spring
closing spring
switching mechanism
closing
spring seat
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
EP07019929A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1914771A2 (en
EP1914771A3 (en
Inventor
Hong-Ik Yang
Sang-Chul Lee
Ki-Hwan Kim
Kil-Young Ahn
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.)
LS Electric Co Ltd
Original Assignee
LS Industrial Systems Co Ltd
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 LS Industrial Systems Co Ltd filed Critical LS Industrial Systems Co Ltd
Publication of EP1914771A2 publication Critical patent/EP1914771A2/en
Publication of EP1914771A3 publication Critical patent/EP1914771A3/en
Application granted granted Critical
Publication of EP1914771B1 publication Critical patent/EP1914771B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • 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

Definitions

  • the present invention relates to a closing spring assembly of a switching mechanism for an air circuit breaker, and more particularly, to a closing spring assembly of a switching mechanism for an air circuit breaker which is capable of being simply produced with low cost.
  • An air circuit breaker is a kind of low voltage circuit breaker, and generally includes a switching mechanism, a cradle supporting the switching mechanism and having a terminal connected to an external power source and a loadside conducting circuit, and a controller (so called 'an Over Current Relay') that is an electrical apparatus generating controlling signals which drive the switching mechanism to a breakage position in other words off position when occurring an over current by monitoring the current on the conducting circuit.
  • a controller so called 'an Over Current Relay'
  • the present invention relates to a closing spring assembly charging an elastic energy for contacting the movable contactor with a fixed contactor or providing a driving force which drives a movable contactor to a closing position by discharging the charged elastic energy, in the switching mechanism of the air circuit breaker.
  • Such closing spring assembly includes one spring seat connected to the switching mechanism and supporting one end portion of a closing spring, the another spring seat supporting the other end portion of the closing spring, and the closing spring. And, in a related art, at least one of spring seats is produced by a molding process using a metallic die due to its complicated shape.
  • the spring seat is formed of a metallic material in order to tolerate a storing elastic energy, but above fabrication method using the metallic die is not easy to be performed and increases in its production cost.
  • US-A-5 856 643 discloses an auxiliary switch operator for a circuit breaker, which operates auxiliary contacts between open and closed positions.
  • the auxiliary switch operator includes a hub which is biased to follow a pole shaft of the circuit breaker and follow the pole shaft when it rotates in a first direction to close separable contacts of the circuit breaker.
  • a first spring mechanism biases the hub to follow the pole shaft when the pole shaft rotates in the first direction.
  • an arm of the hub engages a rotatable shaft to drive an operating lever and operate the auxiliary contacts to the closed position.
  • the pole shaft rotates in the second direction
  • another arm of the hub recharges the first spring mechanism.
  • a second spring mechanism biases the rotatable shaft and the operating lever toward a position corresponding to the open position of the auxiliary contacts when the pole shaft rotates in the second direction.
  • the present inventors recognized the drawbacks of the related art described above. Based upon such recognition, the following features have been conceived.
  • the present invention is directed to providing a closing spring assembly of a switching mechanism for an air circuit breaker comprising:
  • a switching mechanism 1 of the air circuit breaker in accordance with the present invention is installed between a pair of side plates 2, and having a lower portion provided with a closing spring 3 providing a driving force for performing a closing operation of the switching mechanism and a supporting bracket 4.
  • the closing spring assembly in accordance with the present invention includes at least one closing spring 3, wherein the closing spring 3 may be configured with a spring having a small diameter and another spring having a larger diameter for receiving the spring having the small diameter therein so as to increase an elastic driving force of the closing spring 3.
  • a first spring seat member 7 included in the closing spring assembly in accordance with the present invention has one surface having, e.g., four protrusions, so as to support the one end portion of the closing spring 3 not to be separated. Also, the first spring seat member 7 has the other surface with opposite to the above surface, wherein the other surface is provided with a connection portion connected to the switching mechanism, and provides the driving force for closing by receiving the driving force for charging the closing spring 3 or discharging the charged elastic energy.
  • the second spring seat plate 6 included in the closing spring assembly in accordance with the present invention has a front surface supporting the other end portion of the closing spring 3 and a rear surface at the opposite side thereof, wherein the front and rear surfaces are formed by a pressing. That is, as shown in Figure 3 , a plurality of protrusions 6a, 6b at the front surface and the rear surface are respectively formed to be respectively protruded towards the front surface and the rear surface by pressing a metallic plate formed of e.g., a steel material, which is cut to be flat.
  • an insertion hole (reference numeral not given) of the second spring seat plate 6 also may be formed by a punching.
  • a spring guide pin 5 included in the closing spring assembly in accordance with the present invention has both end portions connected to the first spring seat member 7 and the second spring seat plate 6, and is installed to penetrate the closing spring 3 so as to guide and support the closing spring 3. That is, under a state that the closing spring 3 is installed at circumference of the spring guide pin 5, one end portion of the spring guide pin 5 is inserted into a support recess portion (not shown) formed at the first spring seat member 7 to be supported, and the other end portion thereof is extended by passing through the insertion hole of the second spring seat plate 6 and compressed by the pressing so as to couple the spring guide pin 5 with the second spring seat plate 6.
  • a supporting bracket 4 included in the closing spring assembly in accordance with the present invention supports the second spring seat plate 6 of the closing spring 3 of the switching mechanism 1 to be rotatable within a limited angle.
  • the pair of protrusions 6b is provided on the rear surface of the second spring seat plate 6 for being supported by the supporting bracket 4, and the supporting bracket 4, as shown in Figure 5 , is provided with protrusion inserting holes 4b for inserting the protrusions 6b thereinto.
  • the reason that the second spring seat plate 6 should be rotatable within the limited angle is that force may be applied to have an inclined angle, not applied horizontally, when the elastic energy is charged by the switching mechanism 1 or the elastic energy is provided by the closing spring 3.
  • the rotation of the second spring seat plate 6 denotes the rotation in a vertical direction, not in a horizontal direction. And, the angle of the rotation is limited by a vertical height of the protrusion inserting hole 4b.
  • the supporting bracket 4 is provided with protrusions 4a having curved surfaces for guiding the second spring seat plate 6 to be rotated within the limited angle.
  • a steel plate having an oval shape is prepared, and plane cutout portions are formed to form six protrusions spaced to each other with a predetermined distance by the pressing.
  • the front surface and the rear surface of the steel plate is respectively pressed at the same time so that two central cut-out portions are toward the rear surface and the rest four cut-out portions are toward the front surface among the cut-out portions at both sides of the steel plate. Accordingly, as shown in Figure 3 , an unfinished work of the second spring seat plate 6 is obtained. And, the central portion of the unfinished work is punched so as to form the insertion hole.
  • the first spring seat member 7 having one surface provided with a protrusion supporting portion for preventing the spring from being separated and a spring guide pin supporting recess portion at the center thereof, and the other surface provided with a connecting recess connected to the switching mechanism 1 is prepared.
  • one end portion of the spring guide pin 5 is inserted into the spring guide pin supporting recess portion of the first spring seat member 7 to be supported, and the other end portion of the spring guide pin 5 is inserted into the insertion hole of the second spring seat plate 6 under the state that the closing spring 3 is installed at the circumference of the spring guide pin 5.
  • the closing spring assembly of the switching mechanism for the air circuit breaker in accordance with the present invention can be simply produced with low cost because the production of the spring seat and the coupling of the spring guide pin and the spring seat can be simply performed with the low cost by pressing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
EP07019929A 2006-10-17 2007-10-11 Closing spring assembly of switching mechanism for air circuit breaker Active EP1914771B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060101054A KR100798339B1 (ko) 2006-10-17 2006-10-17 기중차단기용 개폐기구의 투입 스프링 어셈블리

Publications (3)

Publication Number Publication Date
EP1914771A2 EP1914771A2 (en) 2008-04-23
EP1914771A3 EP1914771A3 (en) 2009-09-16
EP1914771B1 true EP1914771B1 (en) 2012-06-13

Family

ID=38984197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07019929A Active EP1914771B1 (en) 2006-10-17 2007-10-11 Closing spring assembly of switching mechanism for air circuit breaker

Country Status (6)

Country Link
EP (1) EP1914771B1 (zh)
KR (1) KR100798339B1 (zh)
CN (1) CN101165833B (zh)
ES (1) ES2389508T3 (zh)
MY (1) MY153162A (zh)
RU (1) RU2358350C1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101393806B (zh) * 2008-10-23 2010-09-01 浙江正昌锻造股份有限公司 一种蓄能弹簧导向杆的制作工艺
CN102496494B (zh) * 2011-11-24 2014-01-29 天津市百利电气有限公司 断路器操作机构的储能弹簧机构及其装配方法
KR101180667B1 (ko) 2012-06-27 2012-09-07 주식회사 비츠로테크 전원절환개폐기
US9276546B2 (en) * 2014-02-21 2016-03-01 Tyco Electronics Corporation Electromagnetic interference filter assembly
CN104021996A (zh) * 2014-06-19 2014-09-03 国网上海市电力公司 一种用于断路器分合闸弹簧的调换装置
CN109887797A (zh) * 2019-04-02 2019-06-14 惠州冠泰电子有限公司 一种摇杆开关

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589626B1 (fr) * 1985-10-31 1989-03-03 Merlin Gerin Mecanisme de commande d'un disjoncteur equipe d'un systeme accumulateur d'energie
US5856643A (en) * 1997-08-18 1999-01-05 Eaton Corporation Auxiliary contact operator for electrical switching apparatus
JP4134987B2 (ja) * 2002-12-09 2008-08-20 三菱電機株式会社 気中遮断器
KR200340647Y1 (ko) 2003-11-10 2004-02-05 현대중공업 주식회사 기중차단기의 전원단락 스프링 압착용 지그
JP4463059B2 (ja) 2004-09-28 2010-05-12 三菱電機株式会社 真空遮断器
US7294804B1 (en) * 2007-03-29 2007-11-13 Eaton Corporation Energy dissipating spring seat

Also Published As

Publication number Publication date
EP1914771A2 (en) 2008-04-23
MY153162A (en) 2015-01-29
RU2358350C1 (ru) 2009-06-10
CN101165833B (zh) 2012-01-11
EP1914771A3 (en) 2009-09-16
ES2389508T3 (es) 2012-10-26
CN101165833A (zh) 2008-04-23
KR100798339B1 (ko) 2008-01-28

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