CN102426998B - Operating mechanism of minitype breaker - Google Patents

Operating mechanism of minitype breaker Download PDF

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Publication number
CN102426998B
CN102426998B CN2011102685442A CN201110268544A CN102426998B CN 102426998 B CN102426998 B CN 102426998B CN 2011102685442 A CN2011102685442 A CN 2011102685442A CN 201110268544 A CN201110268544 A CN 201110268544A CN 102426998 B CN102426998 B CN 102426998B
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CN
China
Prior art keywords
lever
snap close
tripping
housing
contact
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Application number
CN2011102685442A
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Chinese (zh)
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CN102426998A (en
Inventor
严鹏斌
邓彦军
段育明
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Noark Electrics Shanghai Co Ltd
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Noark Electrics Shanghai Co Ltd
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Priority to CN2011102685442A priority Critical patent/CN102426998B/en
Publication of CN102426998A publication Critical patent/CN102426998A/en
Application granted granted Critical
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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Abstract

The invention relates to an operating mechanism of a minitype breaker. The operating mechanism includes a handle that can be rotatably installed in a housing. A U-shaped connecting rod is connected to the handle; the other end of the U-shaped connecting rod is movably arranged penetratedly into a sliding groove of a support lever. The support lever can be sleevedly installed on a first fixed shaft by rotating around the first fixed shaft and the first fixed shaft is fixed on the housing. A second fixed shaft is fixed on the support lever; a tension spring is connected on the second fixed shaft; and the tension spring is connected with a third fixed shaft that is fixed on the housing. A pin jump lever that is capable of rotating around the second fixed shaft is sleevedly installed on the second fixed shaft; one end of the pin jump lever is above the sliding groove; and the other end of the pin jump lever is in contact connection with one end of a latching lever. And the latching lever is rotatably sleevedly installed on the first fixed shaft and the other end of the latching lever is in contact connection with one end surface of the support lever. According to the invention, beneficial effects of the operating mechanism are as follows: the tripping arm force of the latching lever is increased; a tripping force can be effectively reduced; and the motion is stable.

Description

A kind of operating mechanism of miniature circuit breaker
Technical field
The invention belongs to Low Voltage Electrical Apparatus, relate in particular to a kind of operating mechanism of miniature circuit breaker.
Background technology
Miniature circuit breaker is the terminal equipment of distribution line, has a volume little, and the characteristics such as modularization, be mainly used in switch and protection circuit.The operating mechanism kind of miniature circuit breaker is various at present, and the power transmission between most employing connecting rods realizes contact closure and the process of separating, and realizes the purpose of threading off by the conversion between operating mechanism four connecting rods and five connecting rods; Can realize that tripping force is little, breaking speed is fast, operates the characteristics such as comfortable.
But because the lever arm of force of existing operating mechanism is less, cause final tripping force larger, can cause that like this bimetal leaf action of delayed time system is unstable.
Summary of the invention
The object of the invention is to overcome the instable shortcoming that the operating mechanism of existing miniature circuit breaker exists, provide that a kind of tripping force is little, the operating mechanism of the miniature circuit breaker of having stable behavior.
For reaching goal of the invention the technical solution used in the present invention, be:
A kind of operating mechanism of miniature circuit breaker, it is arranged in the housing of miniature circuit breaker, it is characterized in that: comprise the rotating handle be arranged in housing, in described handle, be provided with and drive the first reply part that it is returned to initial position;
On described handle, be connected with a U-shaped connecting rod, the other end of described U-shaped connecting rod is located in the sliding tray of support lever movably, and described support lever can be around being sleeved on the first fixed axis that the first fixed axis rotates, and described the first fixed axis is fixed on housing;
On described support lever, be fixed with the second fixed axis, be connected with the extension spring that pulls its rotation on described the second fixed axis, described extension spring is connected with the 3rd fixed axis on being fixed on housing; On described the second fixed axis, be set with the tripping lever that can rotate around it, an end of described tripping lever is positioned at the top of sliding tray, and its other end is connected with an end in contact of snap close lever, on described tripping lever, is connected with the second reply part that drives its reply;
Described snap close lever is rotating to be sleeved on the first fixed axis, and the other end of described snap close lever is connected with an end contact of support lever, and described snap close lever and support lever contact jaw are provided with and drive the 3rd reply part that the snap close lever is replied.
Further, on described support lever, be installed with indication piece and rotating energy storage part is installed, on described energy storage part, be connected with a spring, the other end of described spring is connected with housing, the end of described energy storage part is located on the movement locus of indication piece, and described energy storage part and indication piece are the limit face ways of contact.
Further, described the first reply part is the handle torsion spring, and an end of described handle torsion spring is connected with the handle contact, and its other end is connected with the housing contact.
Further, described the second reply part is the tripping torsion spring, and an end of described tripping torsion spring is connected with the contact of tripping lever, and its other end is connected with the support lever contact.
Further, described the 3rd reply part is the snap close torsion spring, and an end of described snap close torsion spring is connected with the contact of snap close lever, and its other end is connected with the support lever contact.
The present invention is in mechanism's closing course, handle rotates, promote the U-shaped connecting rod, slide in the other end face of cylinder of U-shaped connecting rod in the sliding tray of support lever, the other end face of cylinder of described U-shaped connecting rod is arranged on again an end contact of sliding tray top with the tripping lever, promote the tripping lever and rotate around the second fixed axis; Simultaneously, one end in contact of the other end of tripping lever and snap close lever, the snap close lever is rotated counterclockwise, again due to the other end of snap close lever and an end contact of support lever, make between support lever, tripping lever and snap close lever relatively fixing, become as a whole and rotate along the first fixed axis, complete the closed action of mechanism.
When mechanism need to move, by instantaneous, time delay or link gear, trigger the snap close lever and rotate counterclockwise.At this moment tripping lever and snap close lever break away from mutually, the tripping lever is subject to after the active force of U-shaped connecting rod turning to the lower end position place of the sliding tray of support lever, simultaneously support lever be subject to the effect of extension spring power can be to rotating counterclockwise, stopped by the housing restriction, make circuit breaker be in gate-dividing state; Afterwards, the handle active force that is subject to the handle torsion spring forwards the initial position that is subject to the housing restriction to; The end face that U-shaped connecting rod and tripping lever are arranged on the sliding tray top breaks away from, and the tripping lever rotates counterclockwise by the active force of tripping torsion spring, and the other end of tripping lever and U-shaped link rob are parked in initial position after touch.The active force that the snap close lever is subject to the snap close torsion spring clockwise rotates, and limited by an end face of support lever, rests on initial position.
The present invention also has the quick-make function, is realized by indication piece, spring and energy storage part.Indication piece is fixed on support lever, and the energy storage part rotates in fixed axis around the hole heart.Spring action, on energy storage part and housing, provides counterclockwise restoring force for the energy storage part.When mechanism is closed, when support lever drives indication piece and turns to certain position, one side the contacting of the one side of indication piece and energy storage part, being rotated further of barrier support lever; The rotatory force of contact-making surface on indication piece to the contact edge generation of energy storage part, the active force that makes the energy storage part overcome spring clockwise rotates, when contact edge turns to while with contact-making surface, separating, support lever is rotated further, because moment is broken away from resistance, velocity of rotation increases rapidly, realizes the purpose of mechanism's quick-make.
Beneficial effect of the present invention:
1, the snap close lever is coaxial with the center of rotation of support lever, makes the dropout arm of force of snap close lever increase, and can effectively reduce tripping force.
2, by the sliding tray on support lever, controlled the movement locus of U-shaped connecting rod one end, the degree of freedom that makes linkage is 1, and mechanism is according to the direction motion of determining; The U-shaped connecting rod contacts with the face of tripping lever with the limit of sliding tray simultaneously, makes the stressed direction of tripping lever constant all the time with respect to tripping lever self, is conducive to make the active force between snap close lever and tripping lever to keep stable.
3, the turned position of snap close lever is subject to the restriction of support lever, makes snap close lever and tripping lever only have a place to come in contact, what make the snap close lever stressedly more easily controls, the phenomenon that while having avoided simultaneously mechanism's quick-make, the tripping lever flicks the snap close lever.
The accompanying drawing explanation
Fig. 1 is structural perspective of the present invention.
Fig. 2 is structural plan of the present invention schematic diagram.
The schematic diagram that contacts of tripping lever and snap close lever when Fig. 3 is hasp of the present invention.
The schematic diagram that contacts of support lever and snap close lever when Fig. 4 is hasp of the present invention.
Fig. 5 is the present invention's rear structural representation that closes a floodgate.
Fig. 6 is the present invention's rear structural representation of triping.
Fig. 7 is stored energy mechanism schematic diagram on support lever of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, but does not limit the invention to these embodiments.One skilled in the art would recognize that the present invention contained all alternatives, improvement project and the equivalents that may comprise in claims scope.
With reference to Fig. 1-6, a kind of operating mechanism of miniature circuit breaker, it is arranged in the housing of miniature circuit breaker, comprises the rotating handle 1 be arranged in housing, described handle 1 is connected with an end in contact of one handle torsion spring 12, and the other end of described handle torsion spring 12 is connected with the housing contact;
On described handle 1, be connected with a U-shaped connecting rod 11, the other end 111 of described U-shaped connecting rod 11 is located in the sliding tray 31 of support lever 3 movably, described support lever 3 can be around being sleeved on the first fixed axis 8 that the first fixed axis 8 rotates, and described the first fixed axis 8 is fixed on housing;
On described support lever 3, be fixed with the second fixed axis 4, be connected with extension spring 9 on described the second fixed axis 4, described extension spring 9 is connected with the 3rd fixed axis 10 on being fixed on housing; On described the second fixed axis 4, be set with the tripping lever 5 that can rotate around it, one end 51 of described tripping lever 5 is positioned at the top of sliding tray 31, its other end 52 is connected with end 71 contacts of snap close lever 7, described tripping lever 5 is connected with an end in contact of a tripping torsion spring 2, and the other end of described tripping torsion spring 2 is connected with support lever 3 contacts;
Described snap close lever 7 is rotating to be sleeved on the first fixed axis 8, the other end 72 of described snap close lever 7 is connected with end face 32 contacts of support lever 3, described snap close lever 7 is provided with snap close torsion spring 6 with support lever 3 contact jaws, one end of described snap close torsion spring 6 is connected with 7 contacts of snap close lever, and its other end is connected with support lever 3 contacts.
On described support lever 3, be installed with indication piece 13 and rotating energy storage part 15 is installed, on described energy storage part 15, be connected with a spring 14, the other end of described spring 14 is connected with housing, the end of described energy storage part 15 is located on the movement locus of indication piece 13, and described energy storage part 15 is limit face ways of contact with indication piece 13.
The present invention is in mechanism's closing course, handle 1 rotates, promote U-shaped connecting rod 11, the other end 111 faces of cylinder of U-shaped connecting rod 11 are in the interior slip of sliding tray 31 of support lever 3, the other end 111 faces of cylinder of described U-shaped connecting rod 11 contact with the end face 51 that tripping lever 5 is arranged on sliding tray 31 tops again, promote tripping lever 5 around the second fixed axis 4 rotations; Simultaneously, the other end 52 of tripping lever 5 contacts with an end 71 of snap close lever 7, snap close lever 7 is rotated counterclockwise, the other end 72 due to snap close lever 7 contacts with an end face 32 of support lever 3 again, make between support lever 3, tripping lever 5 and snap close lever 7 relatively fixing, become as a whole and rotate along the first fixed axis 8, complete the closed action of mechanism.
When mechanism need to move, by instantaneous, time delay or link gear, trigger snap close thick stick 7 and rotate counterclockwise.At this moment tripping lever 5 and snap close lever 7 break away from mutually, tripping lever 5 is subject to after the active force of U-shaped connecting rod 11 turning to the lower end position place of the sliding tray 31 of support lever 3, simultaneously support lever 3 be subject to the effect of extension spring 9 power can be to rotating counterclockwise, stopped by the housing restriction, make circuit breaker be in gate-dividing state; Afterwards, handle 1 active force that is subject to handle torsion spring 12 forwards the initial position that is subject to the housing restriction to; U-shaped connecting rod 11 breaks away from the end face 53 that tripping lever 5 is arranged on sliding tray 31 tops, and tripping lever 5 rotates counterclockwise by the active force of tripping torsion spring 2, the other end 54 of tripping lever 5 be parked in initial position after U-shaped connecting rod 11 contacts.The active force that snap close lever 7 is subject to snap close torsion spring 6 clockwise rotates, and is subjected to end face 32 restrictions of support lever 3, rests on initial position.
Referring to Fig. 7, the present invention also has the quick-make function, is realized by indication piece 13, spring 14 and energy storage part 15.Indication piece 13 is fixed on support lever 3, and energy storage part 15 rotates in fixed axis around the hole heart.Spring 14 acts on energy storage part 15 and housing, gives energy storage part 15 for counterclockwise restoring force.When mechanism is closed, when support lever 3 drives indication pieces 13 and turns to certain position, one side the contacting of the one side of indication piece 13 and energy storage part 15, being rotated further of barrier support lever 3; The rotatory force that the contact edge 151 of the 131 pairs of energy storage parts 15 of contact-making surface on indication piece 13 produces, the active force that makes energy storage part 15 overcome spring 14 clockwise rotates, when contact edge 151 turns to while with contact-making surface 131, separating, support lever 3 is rotated further, because moment is broken away from resistance, velocity of rotation increases rapidly, realizes the purpose of mechanism's quick-make.

Claims (4)

1. the operating mechanism of a miniature circuit breaker, it is arranged in the housing of miniature circuit breaker, it is characterized in that: comprise the rotating handle be arranged in housing, in described handle, be provided with and drive it and be returned to first of initial position and reply part;
On described handle, be connected with a U-shaped connecting rod, the other end of described U-shaped connecting rod is located in the sliding tray of support lever movably, and described support lever can be around being sleeved on the first fixed axis that the first fixed axis rotates, and described the first fixed axis is fixed on housing;
On described support lever, be fixed with the second fixed axis, be connected with the extension spring that pulls its rotation on described the second fixed axis, described extension spring is connected with the 3rd fixed axis on being fixed on housing; On described the second fixed axis, be set with the tripping lever that can rotate around it, an end of described tripping lever is positioned at the top of sliding tray, and its other end is connected with an end in contact of snap close lever, on described tripping lever, is connected with the second reply part that drives its reply;
Described snap close lever is rotating to be sleeved on the first fixed axis, and the other end of described snap close lever is connected with an end contact of support lever, and described snap close lever and support lever contact jaw are provided with and drive the 3rd reply part that the snap close lever is replied;
On described support lever, be installed with indication piece and rotating energy storage part is installed, on described energy storage part, be connected with a spring, the other end of described spring is connected with housing, and the end of described energy storage part is located on the movement locus of indication piece, and described energy storage part and indication piece are the limit face ways of contact.
2. the operating mechanism of a kind of miniature circuit breaker according to claim 1 is characterized in that: described first to reply part be the handle torsion spring, and an end of described handle torsion spring is connected with the handle contact, and its other end contacts and is connected with housing.
3. the operating mechanism of a kind of miniature circuit breaker according to claim 1 and 2 is characterized in that: described second to reply part be the tripping torsion spring, and an end of described tripping torsion spring is connected with the contact of tripping lever, and its other end contacts and is connected with support lever.
4. the operating mechanism of a kind of miniature circuit breaker according to claim 3 is characterized in that: the described the 3rd to reply part be the snap close torsion spring, and an end of described snap close torsion spring is connected with the contact of snap close lever, and its other end contacts and is connected with support lever.
CN2011102685442A 2011-09-13 2011-09-13 Operating mechanism of minitype breaker Active CN102426998B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102685442A CN102426998B (en) 2011-09-13 2011-09-13 Operating mechanism of minitype breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102685442A CN102426998B (en) 2011-09-13 2011-09-13 Operating mechanism of minitype breaker

Publications (2)

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CN102426998A CN102426998A (en) 2012-04-25
CN102426998B true CN102426998B (en) 2013-11-27

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202816829U (en) * 2012-09-20 2013-03-20 上海诺雅克电气有限公司 High-stability miniature circuit breaker
CN106449286B (en) * 2015-08-11 2019-05-28 浙江正泰电器股份有限公司 The mounting structure and assembly method of breaker

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69113830T2 (en) * 1990-02-23 1996-05-23 Matsushita Electric Works Ltd Circuit breaker.
JP3972782B2 (en) * 2002-09-26 2007-09-05 富士電機機器制御株式会社 Circuit breaker
CN101159208A (en) * 2007-11-27 2008-04-09 Tcl低压电器(无锡)有限公司 Small circuit breaker mechanism
CN202259079U (en) * 2011-09-13 2012-05-30 上海诺雅克电气有限公司 Operating mechanism of small-sized breaker

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Application publication date: 20120425

Assignee: ZHEJIANG CHINT ELECTRICS Co.,Ltd.

Assignor: SHANGHAI NOARK ELECTRIC Co.,Ltd.

Contract record no.: X2021330000593

Denomination of invention: Operating mechanism of miniature circuit breaker

Granted publication date: 20131127

License type: Common License

Record date: 20211025