EP1914776B1 - Ensemble de palier de support d'un mécanisme de commutation pour disjoncteur à air et son procédé de fabrication - Google Patents

Ensemble de palier de support d'un mécanisme de commutation pour disjoncteur à air et son procédé de fabrication Download PDF

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Publication number
EP1914776B1
EP1914776B1 EP07019933A EP07019933A EP1914776B1 EP 1914776 B1 EP1914776 B1 EP 1914776B1 EP 07019933 A EP07019933 A EP 07019933A EP 07019933 A EP07019933 A EP 07019933A EP 1914776 B1 EP1914776 B1 EP 1914776B1
Authority
EP
European Patent Office
Prior art keywords
bearing
trust
bearing assembly
support member
circuit breaker
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
EP07019933A
Other languages
German (de)
English (en)
Other versions
EP1914776A1 (fr
Inventor
Kil-Young Ahn
Hong-Ik Yang
Sang-Chul Lee
Ki-Hwan Kim
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 EP1914776A1 publication Critical patent/EP1914776A1/fr
Application granted granted Critical
Publication of EP1914776B1 publication Critical patent/EP1914776B1/fr
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
    • 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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • 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
    • 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
    • H01H2003/326—Driving mechanisms, i.e. for transmitting driving force to the contacts using bearings
    • 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
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices

Definitions

  • the present invention relates to a switching mechanism of an air circuit breaker, a type of a low voltage circuit breaker, and more particularly, to a bearing assembly, which supports at least one of rotational shafts such that it can be smoothly rotated, capable of effectively supporting a bearing that receives much axial load.
  • the air circuit breaker includes a switching mechanism that opens or closes a current conduction circuit, a cradle unit for housing the switching mechanism and having a terminal part connected with an external power source and a load, and a circuit monitoring and controlling unit that senses a fault current of the current conduction circuit as connected and provides a driving power for automatically moving the switching mechanism to a breaking (trip) position.
  • the present invention relates to the switching mechanism, which is called as a main circuit part of the major parts of the air circuit breaker, and the related art bearing assembly will now be described.
  • a charging operation of a closing spring, a closing operation and a breaking (trip) operation are basic operations of the air circuit breaker.
  • much load is applied to a cam shaft that charges the closing spring by large charged elastic energy according to high elastic coefficient of the closing spring.
  • the bearing is used, and a support structure may be deformed or damaged by the load in direction of axis according to the structure that supports the bearing.
  • the switching mechanism for an air circuit breaker as shown in FIG .1 is installed between both of side plates 6a, 6b, reference numeral 1 is a cam shaft, namely, a rotational shaft, of a charging cam (refer to reference numeral 2 in FIG. 2 ) for charging the closing spring (not shown), and reference numeral 5 is a handle connected with one end of the cam shaft 1 to rotate the cam shaft 1 manually.
  • the cam shaft 1 penetrates between both side plates 6a and 6b and extends from one of the side plates 6a and 6b.
  • the bearing assembly of the switching mechanism is installed at an outer side of the two charging cams 2 on the cam shaft 1, respectively, to support the cam shaft 2 such that the cam shaft 2 can be smoothly rotated.
  • the bearing assembly includes a trust bearing 3 which has a flange part and substantially has a ring shape, and a trust bearing support member 4 that rotatably supports the trust bearing 3.
  • the trust bearing support member 4 includes a flange part 4a allowing the trust bearing 3 to be mounted thereon, an inner diameter part 4c with which the trust bearing comes in contact while being rotated, a rounded part 4b formed between the flange portion 4a and the inner diameter portion 4c, and an axial hole wall 4d allowing the cam shaft 1 to pass therethrough.
  • a row material (not shown) of the substantially rectangular trust bearing support member 4 is prepared.
  • the raw material is pressed downwardly to obtain a substantially U-shaped semi-processed material with a flange.
  • a middle portion in the direction of diameter of the semi-processed material is punctured to form a substantially U-shaped trust bearing support member 4 with a central through hole.
  • the trust bearing 3 is inserted into the inner diameter part of the substantially U-shaped trust bearing support member 4 to complete fabrication of the bearing assembly as shown in FIG. 3 .
  • the rounded part 4b is formed to be large (namely, the height of the rounded part 4b is formed to be long in FIG. 4 ) while the inner diameter part 4c contacting with the trust bearing 3 is shortened.
  • One aspect of the exemplary embodiments is to provide a bearing assembly of a switching mechanism for an air circuit breaker, in which an inner diameter part that contacts with a trust bearing is long to distribute an axial load applied to a trust bearing support member.
  • Another aspect of the exemplary embodiments is to provide a method for fabricating a bearing assembly of a switching mechanism for an air circuit breaker.
  • This specification provides a bearing assembly of a switching mechanism for an air circuit breaker having multiple rotational shafts, that may include: a trust bearing that supports at least one of the rotational shafts such that it can be smoothly rotated and includes an annular body part and a flange part extending from the body part; and a trust bearing support member that includes an axial hole wall forming an axial hole through which the rotational shaft passes, an inner diameter part extending from the axial hole wall and contacting with the trust bearing, a flange part extending from the inner diameter part, a rounded part formed between the inner diameter part and the flange part, and an annular recess portion formed at a lower portion of the flange part by pressing to lengthen the inner diameter part and shorten the length of the rounded part to thus increase the area contacting with the trust bearing.
  • This specification also provides a method for fabricating a bearing assembly of a switching mechanism for an air circuit breaker, that may include: shaping a U-shaped unfinished material with a flange part by pressing a flat raw material downwardly; shaping an annular recess portion by pressing a lower portion of the flange part of the unfinished material upwardly; shaping an axial hole by puncturing the bottom of the unfinished material; and assembling by inserting an annular trust bearing into the the bearing support member.
  • the bearing assembly includes a trust bearing 3 which has a flange part and substantially has a ring shape, and a trust bearing support member 4 that rotatably supports the trust bearing 3.
  • the trust bearing support member 4 includes a flange part 4a allowing the trust bearing 3 to be mounted thereon, an inner diameter part 4c with which the trust bearing 3 comes in contact while being rotated, a rounded part 4b formed between the flange part 4a and the inner diameter part 4c, an axial hole wall 4d allowing the cam shaft 1 to pass therethrough; and an annular recess portion 4e formed at a lower portion of the flange part 4a by pressing to lengthen the inner diameter part 4c and shorten the length of the rounded part 4b to thus increase the area contacting with the trust bearing 3.
  • the annular recess portion 4e of the trust bearing support member 4 is formed at a portion where an outer diameter part and the flange party 4a of the trust bearing support member 4 are met.
  • the raw material is pressed downwardly to obtain a substantially U-shaped unfinished work with a flange.
  • the trust bearing 3 is inserted into the inner diameter part of the substantially U-shaped trust bearing support member 4 to complete production of the bearing assembly.

Landscapes

  • Sliding-Contact Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Breakers (AREA)

Claims (3)

  1. Un ensemble de palier d'un mécanisme de commutation pour un coupe-circuit pneumatique comportant de multiples arbres tournants, l'ensemble de palier comprenant:
    un palier de poussée (3) qui supporte au moins l'un des arbres tournants de manière qu'il puisse être tourné en douceur, et inclut une partie de corps annulaire et une partie de rebord s'étendant à partir de la partie de corps ; et
    un organe support de palier de poussée (4) qui inclut une paroi d'orifice axial (4d) formant un orifice axial au travers duquel passe l'arbre tournant, une partie de diamètre interne (4c) s'étendant depuis la paroi d'orifice axial (4d) et venant en contact avec le palier de poussée (3), une partie de rebord (4a) s'étendant depuis la partie de diamètre intérieur (4c), une partie arrondie (4b) formée entre la partie de diamètre intérieur (4c) et la partie de rebord (4a), caractérisé par une partie de renfoncement annulaire (4e) formée en une zone inférieure de la partie de rebord par pressage de manière à allonger la partie de diamètre intérieur (4c) et raccourcir la longueur de la partie arrondie (4b) de manière à ainsi accroître la surface venant en contact avec le palier de poussée (3).
  2. L'ensemble de palier de la revendication 1, dans lequel la partie de renfoncement annulaire (4e) de l'organe support de palier de poussée (4) est formée en une zone où une partie de diamètre extérieur et la partie de rebord (4a) de l'organe support de palier de poussée (4) se rejoignent.
  3. Un procédé de fabrication d'un ensemble de palier d'un mécanisme de commutation pour un coupe-circuit pneumatique, le procédé comprenant :
    la conformation d'une pièce non finie en forme de U avec une partie de rebord (4a) par pressage vers le bas d'une matière première plate ;
    la conformation d'une partie de renfoncement annulaire (4e) par pressage d'une zone inférieure de la partie de rebord de la pièce non finie vers le haut ;
    la conformation d'un orifice axial par perçage du fond de la pièce non finie ; et
    l'assemblage par insertion d'un palier de poussée annulaire (3) jusque dans l'organe support de palier (4).
EP07019933A 2006-10-17 2007-10-11 Ensemble de palier de support d'un mécanisme de commutation pour disjoncteur à air et son procédé de fabrication Active EP1914776B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060101053A KR100807542B1 (ko) 2006-10-17 2006-10-17 기중 차단기용 개폐기구의 베어링 어셈블리 및 그 제조방법

Publications (2)

Publication Number Publication Date
EP1914776A1 EP1914776A1 (fr) 2008-04-23
EP1914776B1 true EP1914776B1 (fr) 2010-03-31

Family

ID=38926394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07019933A Active EP1914776B1 (fr) 2006-10-17 2007-10-11 Ensemble de palier de support d'un mécanisme de commutation pour disjoncteur à air et son procédé de fabrication

Country Status (7)

Country Link
EP (1) EP1914776B1 (fr)
KR (1) KR100807542B1 (fr)
CN (1) CN101183621B (fr)
DE (1) DE602007005572D1 (fr)
ES (1) ES2343753T3 (fr)
MY (1) MY153158A (fr)
RU (1) RU2346348C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101677998B1 (ko) * 2010-12-16 2016-11-22 엘에스산전 주식회사 배선용차단기의 샤프트 어셈블리
CN105965206B (zh) * 2016-05-10 2017-11-07 重庆江增船舶重工有限公司 涡轮增压器环形推力轴承的加工方法及其磨用工具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1923892A (en) * 1929-07-01 1933-08-22 O & S Bearing Company Steering column bearing
US3600540A (en) * 1969-11-06 1971-08-17 Westinghouse Electric Corp Motor-operated spring-closing circuit breaker
US4336516A (en) * 1980-03-31 1982-06-22 Westinghouse Electric Corp. Circuit breaker with stored energy toggle-lock structure
US5704717A (en) * 1996-09-17 1998-01-06 Franklin Electric Co., Inc. Bearing support for rotary machine
KR100473068B1 (ko) * 1997-09-30 2005-07-07 오리온전기 주식회사 전자총의캐소드제조방법
CN2478224Y (zh) * 2001-03-23 2002-02-20 普兰店市气动件厂 电动合分闸操作装置

Also Published As

Publication number Publication date
MY153158A (en) 2015-01-29
ES2343753T3 (es) 2010-08-09
KR100807542B1 (ko) 2008-02-29
RU2346348C1 (ru) 2009-02-10
CN101183621B (zh) 2010-11-10
DE602007005572D1 (de) 2010-05-12
CN101183621A (zh) 2008-05-21
EP1914776A1 (fr) 2008-04-23

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