EP4254462A2 - Système de commande de disjoncteur miniature et disjoncteur miniature le comprenant - Google Patents

Système de commande de disjoncteur miniature et disjoncteur miniature le comprenant Download PDF

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Publication number
EP4254462A2
EP4254462A2 EP23161952.9A EP23161952A EP4254462A2 EP 4254462 A2 EP4254462 A2 EP 4254462A2 EP 23161952 A EP23161952 A EP 23161952A EP 4254462 A2 EP4254462 A2 EP 4254462A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
contact
handle
latch
operating system
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.)
Pending
Application number
EP23161952.9A
Other languages
German (de)
English (en)
Other versions
EP4254462A3 (fr
Inventor
Shunfeng GUO
Hui Zhou
Suming Xiang
Xiuying ZHOU
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.)
Eaton Electrical Ltd
Original Assignee
Eaton Electrical 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 Eaton Electrical Ltd filed Critical Eaton Electrical Ltd
Publication of EP4254462A2 publication Critical patent/EP4254462A2/fr
Publication of EP4254462A3 publication Critical patent/EP4254462A3/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • 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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts

Definitions

  • the present invention relates to the technical field of electrical equipment, and relates in particular to an operating system of a miniature circuit breaker and a miniature circuit breaker having the same.
  • Miniature circuit breakers are widely employed as an important electrical protection device, and are generally mounted to a terminal distribution line, thus being used for current connection and loading or disconnection under normal and abnormal circuit conditions.
  • the miniature circuit breaker generally includes an operating system, a tripping system, and other structures to achieve switching between closed and open states of the miniature circuit breaker in a normal or abnormal circuit.
  • the operating system of the miniature circuit breaker may include a support rotating shaft rotatably mounted to a housing, a contact component rotatably sleeved onto the support rotating shaft, and a tripping component sleeved onto the support rotating shaft by means of a re-buckling torsion spring.
  • the tripping component overcomes the bias pressure of the re-buckling torsion spring to move to an unlocked state, then the contact component moves to an opening position, and finally the tripping component moves to a locked state again due to the resilience of the re-buckling torsion spring.
  • the re-buckling torsion spring in the prior art generally has a relatively small spring wire diameter, which may increase the assembly difficulty of the operating system of the miniature circuit breaker and result in difficulty in implementing automated assembly.
  • the existing contact component generally includes a contact support frame having one end connected to the tripping component and an approximately middle region sleeved onto the support rotating shaft, and the other end of the contact support frame is connected, by means of a contact rivet, to a contact rod provided with a movable contact.
  • the tripping component first drives the contact support frame to rotate, and then the contact support frame drives the contact rod to rotate about the contact rivet.
  • the present invention aims to provide an operating system of a miniature circuit breaker that can at least solve part of the foregoing problems.
  • the present invention further aims to provide a miniature circuit breaker having the foregoing improved operating system.
  • an operating system of a miniature circuit breaker is provided.
  • the operating system is mounted to a circuit breaker body of the miniature circuit breaker, and comprises: a handle, rotatably mounted to the circuit breaker body by means of a handle rotating shaft; a contact component, rotatably mounted to the circuit breaker body by means of a support rotating shaft and remaining in contact with a static contact on the circuit breaker body; a latch, rotatably mounted to the contact component; a linkage, two ends of which are rotatably connected to the handle and the latch respectively; a tripping rod, sleeved onto the support rotating shaft and capable of rotating relative to the contact component; and a handle torsion spring, sleeved onto the handle rotating shaft, two ends of the handle torsion spring being respectively connected to the handle and the tripping rod, the handle torsion spring being always in an energy storage state so as to push the tripping rod towards the latch to keep the tripping rod locked with the latch;
  • the operating system of the present invention can be mounted to the circuit breaker body of the miniature circuit breaker, and enables the miniature circuit breaker to move to a closed, tripping, or open state through cooperation between the handle, the latch, the contact component, and the tripping rod.
  • the contact component and the tripping rod are both rotatably mounted to the circuit breaker body by means of the support rotating shaft, and the handle torsion spring that is always in an energy storage state can provide an acting force for pushing the tripping rod towards the latch, thereby maintaining a locked state when the tripping rod and the latch are locked and driving the two to return to a locked state when the tripping rod is unlocked from the latch.
  • a re-buckling torsion spring usually mounted to the support rotating shaft can be eliminated, thereby greatly reducing the assembly difficulty of the operating system and facilitating automated assembly, and accordingly greatly improving the assembly efficiency of the operating system of the present invention.
  • the contact component comprises a contact support frame sleeved onto the support rotating shaft and a contact rod extending from the contact support frame towards the static contact, a side of the contact rod facing the static contact is provided with a movable contact, and the contact support frame and the contact rod are integrally formed.
  • the operating system further comprises a contact pressure spring disposed between the contact support frame and the circuit breaker body, the contact pressure spring being in an energy storage state.
  • the contact support frame is provided with a recess used to accommodate an end portion of the contact pressure spring.
  • the latch is provided with a first connecting hole configured to connect to the linkage and a second connecting hole configured to connect to the contact support frame.
  • a first engagement member is provided at a side of the latch facing the tripping rod
  • a second engagement member fitting with the first engagement member is provided at a side of the tripping rod facing the latch.
  • a first position-limiting portion is formed at a side of the tripping rod facing the contact support frame, and a second position-limiting portion fitting with the first position-limiting portion is formed on the contact support frame.
  • connection member pressed against an end portion of the handle torsion spring is disposed on the tripping rod.
  • a miniature circuit breaker is provided, and comprises a circuit breaker body and the foregoing operating system.
  • join and "connect” and similar terms used in the present invention refer to two components being indirectly connected to each other by an intermediate layer (such as an adhesive or a solder) or an intermediate member (such as a connection member or a transition member), and also refer to two components being directly connected to each other without any intermediate layer (such as an adhesive or a solder) or any intermediate member (such as a connection member or a transition member).
  • an intermediate layer such as an adhesive or a solder
  • intermediate member such as a connection member or a transition member
  • FIGs. 1 to 7 show, by way of example, a miniature circuit breaker 100 in the present invention.
  • the miniature circuit breaker 100 of the present invention has less components and can be assembled automatically, thereby greatly improving assembly efficiency and reducing manufacturing costs.
  • FIGs. 1 to 3 show the miniature circuit breaker 100 in a closed state
  • FIGs. 4 and 5 show the miniature circuit breaker 100 in a tripping state
  • FIGs. 6 and 7 show the miniature circuit breaker 100 in an open state.
  • the miniature circuit breaker 100 may include a circuit breaker body and an operating system 10 mounted to the circuit breaker body.
  • the circuit breaker body may include structures such as a housing, a static contact, and a tripping system that are known to persons skilled in the art. It should be understood that other functions not mentioned in the involved structures of the miniature circuit breaker 100 in this embodiment and other structures not mentioned herein may be well known to those skilled in the art, so the details thereof are omitted herein.
  • the operating system 10 includes a handle, a contact component 12, a latch 13, a linkage 14, a tripping rod 15, and a handle torsion spring 16.
  • the handle may be rotatably mounted to the housing by means of a handle rotating shaft, and thus can be rotated to a closing or opening position under the effect of an external force.
  • the latch 13 is rotatably connected to the contact component 12, and the two ends of the linkage 14 are respectively rotatably connected to the handle and the latch 13.
  • the contact component 12 is rotatably mounted to the housing by means of a support rotating shaft 17, such that the handle can drive the latch 13 to rotate relative to the contact component 12 by means of the linkage 14, thereby driving the contact 123 component 12 to rotate relative to the housing by means of the linkage 14 and the latch 13.
  • a line connecting a rotation center of the handle to a connecting point between the linkage 14 and the handle, a line connecting the connecting point between the linkage 14 and the handle to a connecting point between the linkage 14 and the latch 13, a line connecting the connecting point between the linkage 14 and the latch 13 to a rotation center of the contact component 12, and a line connecting the rotation center of the contact component 12 to the rotation center of the handle may be considered as a four-linkage mechanism.
  • the contact component 12 rotates to a closing position to contact the static contact or rotates to an opening position to separate from the static contact, such that the miniature circuit breaker 100 is closed or opened.
  • the tripping rod 15 is rotatably sleeved onto the support rotating shaft 17 and can rotate relative to the contact component 12. As shown in FIGs. 1 and 2 , the tripping rod 15 may be regarded as located in front of the contact component 12. The tripping rod 15 is locked with the latch 13 when the miniature circuit breaker 100 is in a closed or open state, thereby restricting rotation of the latch 13 to keep the miniature circuit breaker 100 in the corresponding closed or open state.
  • the handle torsion spring 16 may be mounted to the handle in an energy storage state and two ends of the handle torsion spring are respectively connected to the handle and the tripping rod 15.
  • An end of the handle torsion spring 16, namely, a second end 162 of the handle torsion spring 16 that is connected to the tripping rod 15, can push the tripping rod 15 towards the latch 13 so that the tripping rod 15 and the latch 13 are kept in a locked state.
  • the miniature circuit breaker 100 is in a closed state.
  • the handle torsion spring 16 is in a first energy storage state so that a first end 161 of the handle torsion spring 16 has a clockwise rotation trend and a second end 162 thereof has a counterclockwise rotation trend.
  • the first end 161 of the handle torsion spring can subject the handle to a clockwise pushing force, while the second end 162 of the handle torsion spring 16 can subject the tripping rod 15 to a clockwise pushing force, such that the tripping rod 15 is pushed towards the latch 13.
  • the directions of the pushing forces to which the handle and the tripping rod 15 are subjected are limited by the rotation center of the handle and the rotation center of the tripping rod 15, respectively.
  • a push rod of a tripping system such as an electromagnetic tripping system
  • the miniature circuit breaker 100 Upon the occurrence of circuit abnormality, such as a short circuit or overload, a push rod of a tripping system, such as an electromagnetic tripping system, of the miniature circuit breaker 100 extends to the tripping rod 15 and pushes the tripping rod 15 to overcome the pushing force exerted by the handle torsion spring 16, such that the tripping rod is rotated counterclockwise. Accordingly, the tripping rod 15 is unlocked from the latch 13, and the four-linkage mechanism described above can move under the effect of a corresponding external force. At the time, the miniature circuit breaker 100 can be regarded as being in a closed and tripping state.
  • the handle can perform an opening operation when the tripping rod 15 is unlocked from the latch 13.
  • the handle may rotate clockwise by a certain angle from the closing position shown in FIGs. 1 and 2 to the position shown in FIGs. 4 and 5 .
  • the first end of the linkage 14 connected to the handle moves clockwise along the perimeter of the handle, and the second end 162 of the linkage 14 connected to the latch 13 drives the latch 13 to rotate clockwise.
  • the contact component 12 is driven by the handle by means of the latch 13 and the linkage 14 to the opening position where the contact component is separated from the static contact.
  • the tripping rod 15 and the latch 13 are kept in a tripping state.
  • the miniature circuit breaker 100 is regarded as being in an open and tripping state.
  • the handle continuously rotates clockwise from the position shown in FIGs. 4 and 5 to the opening position shown in FIGs. 6 and 7 .
  • the first end of the linkage 14 continuously moves clockwise along the perimeter of the handle, and the second end of the linkage 14 draws the latch 13 to rotate counterclockwise until the latch is locked with the tripping rod 15 again.
  • the miniature circuit breaker 100 is regarded as being in an open state.
  • the handle torsion spring 16 moves from the initial first energy storage state to the final second energy storage state.
  • the second end 162 of the handle torsion spring 16 connected to the tripping rod 15 can, when in the closed state and the open state, push the tripping rod 15 towards the latch 13 all the time to keep them locked, thereby limiting the movement of the four-linkage mechanism.
  • the tripping rod 15 and the contact component 12 in the operating system 10 provided by the present invention both rotate about the support rotating shaft 17, and the conventional re-buckling torsion spring sleeved onto the support rotating shaft 17 may be eliminated based on the arrangement of the handle torsion spring 16.
  • the operating system 10 of the miniature circuit breaker 100 in the present invention can be assembled automatically, thereby greatly improving assembly efficiency.
  • the contact component 12 may be first sleeved onto the support rotating shaft 17, and then the tripping rod 15 is sleeved onto the support rotating shaft 17; and then the latch 13 is mounted to the contact component 12, thereby forming the corresponding operating mechanism.
  • the contact component 12 includes a contact support frame 121 and a movable contact rod that are integrally formed.
  • the contact support frame 121 may be sleeved onto the support rotating shaft 17 and is rotatable about the support rotating shaft 17.
  • the movable contact rod extends from the contact support frame 121 towards the static contact, such as extending generally downwards, and a side thereof that faces the static contact may be provided with a movable contact 123. Therefore, when the movable contact rod rotates about the support rotating shaft 17 along with the contact support frame 121 to the closing position, the movable contact 123 is in contact with the static contact, and correspondingly, when the movable contact rod rotates to the opening position, the movable contact 123 is separated from the static contact.
  • the operating system 10 may further include a contact pressure spring 18 disposed between the contact support frame 121 and the housing in an energy storage state.
  • the contact pressure spring 18 when the miniature circuit breaker 100 is in an open state, the contact pressure spring 18 may be in a natural state, and when the miniature circuit breaker 100 is closed, the contact pressure spring stores energy, so as to provide a contact pressure between the movable contact 123 on the movable contact rod and the static contact when the miniature circuit breaker 100 is moving to the closed state, thereby achieving reliable contact between the movable contact 123 and the static contact of the miniature circuit breaker 100.
  • the contact support frame 121 may be provided with a recess used to accommodate one end of the contact pressure spring 18. The recess is easy to manufacture, and easy to arrange compared to conventional tension spring installation processes such as manually fastening one end of a tension spring to the contact support frame 121.
  • a mounting post 124 may be disposed at a side, such as an upper side, of the contact support frame 121 opposite to the movable contact rod, and the latch 13 may be provided with a first connecting hole and a second connecting hole respectively connected to the linkage 14 and the mounting post 124. In this way, the latch 13 can be easily manufactured and easily installed.
  • the latch 13 and the tripping rod 15 are respectively provided with a first engagement member 131 and a second engagement member 151 that can fit with each other at respective sides of the latch and the tripping rod that face each other.
  • the latch 13 may be provided with an engagement protrusion that protrudes towards the tripping rod 15, and the tripping rod 15 may be provided with a corresponding engagement recess.
  • a first position-limiting portion such as a position-limiting slot
  • a second position-limiting portion such as a position-limiting protrusion, that fits with the slot wall of the position-limiting slot may be formed at a side of the contact support frame 121 that faces the tripping rod 15, thereby limiting the angle by which the tripping rod 15 can be rotated clockwise when the tripping rod 15 is unlocked from the latch 13.
  • a counterclockwise rotation angle of the tripping rod 15 is restricted by the second end 162 of the handle torsion spring 16.
  • a connection member 153 pressed against the second end 162 of the handle torsion spring 16 may be further disposed on the tripping rod 15, to receive the pushing force exerted by the second end 162 of the handle torsion spring 16 in an energy storage state on the tripping rod 15.
  • the second end 162 of the handle torsion spring 16 only needs to be placed at a counterclockwise direction side of the connection member 153 with respect to the rotation center of the tripping rod 15. The assembly is extremely easy.
  • a latch torsion spring may be disposed between the latch 13 and the mounting post 124, and a contact torsion spring may be disposed between the contact support frame 121 and the support rotating shaft 17.
  • These elastic elements may be arranged to be in an energy storage state when the miniature circuit breaker 100 is in a closed state, so as to provide an elastic force enabling the contact support frame 121 and the latch 13 to move to the opening position after the tripping rod 15 is unlocked from the latch 13, thereby improving the operational reliability of the miniature circuit breaker 100.
  • each embodiment does not necessarily include only one independent technical solution.
  • the presentation manner of the description is merely for clearness, and those skilled in the art should regard the description as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other implementations comprehensible by those skilled in the art.

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EP23161952.9A 2022-03-28 2023-03-15 Système de commande de disjoncteur miniature et disjoncteur miniature le comprenant Pending EP4254462A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210313858.8A CN114783837A (zh) 2022-03-28 2022-03-28 微型断路器的操作系统和具有其的微型断路器

Publications (2)

Publication Number Publication Date
EP4254462A2 true EP4254462A2 (fr) 2023-10-04
EP4254462A3 EP4254462A3 (fr) 2023-10-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP23161952.9A Pending EP4254462A3 (fr) 2022-03-28 2023-03-15 Système de commande de disjoncteur miniature et disjoncteur miniature le comprenant

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EP (1) EP4254462A3 (fr)
CN (1) CN114783837A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108878230A (zh) * 2018-08-23 2018-11-23 无锡新宏泰电器科技股份有限公司 一种断路器触头的限位结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619242C2 (de) * 1986-06-07 1994-07-21 Kloeckner Moeller Gmbh Schaltmechanismus für einen Leitungsschutzschalter
FR2614467A1 (fr) * 1987-04-21 1988-10-28 Telemecanique Electrique Appareil interrupteur de protection a mecanisme de declenchement simplifie
AT404648B (de) * 1992-06-29 1999-01-25 Felten & Guilleaume Ag Oester Selbstschalter
JP4621751B2 (ja) * 2008-03-06 2011-01-26 パナソニック電工電路株式会社 回路遮断器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108878230A (zh) * 2018-08-23 2018-11-23 无锡新宏泰电器科技股份有限公司 一种断路器触头的限位结构

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Publication number Publication date
CN114783837A (zh) 2022-07-22
EP4254462A3 (fr) 2023-10-11

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