CN106783425A - The tripping mechanism of selective miniature circuit breaker - Google Patents
The tripping mechanism of selective miniature circuit breaker Download PDFInfo
- Publication number
- CN106783425A CN106783425A CN201611143889.4A CN201611143889A CN106783425A CN 106783425 A CN106783425 A CN 106783425A CN 201611143889 A CN201611143889 A CN 201611143889A CN 106783425 A CN106783425 A CN 106783425A
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- CN
- China
- Prior art keywords
- lock
- torsion spring
- tripping
- fixing axle
- circuit breaker
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- 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.)
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Classifications
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- 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
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Abstract
The invention discloses the tripping mechanism of selective miniature circuit breaker, belong to the technical field of low-voltage circuit breaker manufacture.Tripping mechanism includes：First fixing axle P, rack plate fixture, multi-cascade lever, latch, be fixed on rack plate fixture with drive multi-cascade lever or lock reset lock torsion spring, the second fixing axle O, tripping, lock torsion spring is using three overall torsion spring structures of torque arm support, substitute the torsion spring structure of original two independent four torque arm support, the reliability of torsion spring and the simplicity of structure are improve, this tripping mechanism realizes the frictional force minimum of tripping upper surface extension board and lock upper surface and can realize that selective miniature circuit breaker combined floodgate keeps and rapid-releasing.
Description
Technical field
The invention discloses a kind of tripping mechanism, the especially tripping mechanism of selective miniature circuit breaker, belong to low pressure and break
The technical field of road device manufacture.
Background technology
Production and living propose higher and higher requirement to the security of electricity consumption, reliability and continuity.In terminal power distribution
In system, selective miniature circuit breaker (SMCB, Selective protection of Miniature Circuit
Breaker) because the miniature circuit breaker (MCB, Miniature Circuit Breaker) for overcoming cascade cooperation is short in appearance
Can bypass the immediate leadership during the failure of road tripping operation shortcoming and drastically increase continuity, stability and the reliability of electric power system.
However, the releasing structure design of SMCB operating mechanisms at present, on the one hand using two independent four torque arm supports
Torsion spring structure, the characteristics of there is mounting structure complicated, poor reliability in the tripping mechanism for designing based on this；The opposing party
Face, the design of operating mechanism determines the design of tripping mechanism by prototype fabrication and lot of experiments by the experience of engineer
Thinking, inter-agency frictional force is larger to cause tripping force larger, and this is just proposed to the bimetal leaf material characteristic of short circuit short time-delay
Requirement higher, it is possible to the phenomenon for threading off not fall occur.
The content of the invention
Goal of the invention of the invention is directed to the deficiency of above-mentioned background technology, there is provided the dropout of selective miniature circuit breaker
Mechanism, tripping upper end extension board is minimum with the frictional force of lock upper surface and can realize that selective miniature circuit breaker combined floodgate keeps
And rapid-releasing, existing tripping mechanism mounting structure complexity, the technical problem of poor reliability are solved, also solve existing dropout
Mechanism is because of the larger technical problem for causing tripping force larger of frictional force between structure.
The present invention is adopted the following technical scheme that for achieving the above object：
The tripping mechanism of selective miniature circuit breaker, including：First fixing axle P, rack plate fixture, multi-cascade lever,
Latch, be fixed on rack plate fixture to drive multi-cascade lever or the lock torsion spring of lock reset, the second fixing axle O, jump
Button, is provided with the through hole passed through for the first fixing axle P, the second fixing axle O, multi-cascade lever, lock, lock on rack plate fixture
Torsion spring is set on the first fixing axle P, and tripping is set on the second fixing axle O.
The alternatively further prioritization scheme of the tripping mechanism of property miniature circuit breaker, lock torsion spring is with two coils
The overall structures of group and three torque arm supports, the initiating terminal of first coil group as lock torsion spring upper bridge torque arm, first coil
The end end of group is wound with and is constructed as the coil of torque arm in the middle of lock torsion spring, and the end end of coil construction is the second coil group
Initiating terminal, the end end of the second coil group is the lower bridge torque arm of lock torsion spring, and the lower bridge torque arm of lock torsion spring rides over lock
Medial surface, the middle torque arm of lock torsion spring is ridden on rack plate fixture, and the upper bridge torque arm of lock torsion spring rides over multi-cascade lever
On.
Alternatively the further prioritization scheme of the tripping mechanism of property miniature circuit breaker, latches and is extended with lock upper surface,
Tripping is in the buckle press compression tripping upper end extension board produced during closing position end and is overlapped on lock upper surface.
The alternatively further prioritization scheme of the tripping mechanism of property miniature circuit breaker, the first fixing axle P to lock bottom
Length be the first fixing axle P to lock upper surface length twice.
The alternatively further prioritization scheme of the tripping mechanism of property miniature circuit breaker, the second fixing axle O is in tripping
The angle of the buckle press direction arm of force produced during closing position end is 90 °.
The present invention uses above-mentioned technical proposal, has the advantages that：
(1) torsion of original two independent four torque arm support is substituted using three overall torsion spring structures of torque arm support
Spring structure, to realize the reset of multi-cascade lever and lock, improves the reliability of torsion spring, simplifies the structure of tripping mechanism；
(2) it is the first fixing axle P to lock upper surface length by the first fixing axle P of design to the length of lock bottom
Twice, the angle that the second fixing axle O to tripping is in the buckle press direction arm of force produced during closing position end is 90 °, tripping
Upper end extension board is minimum with the frictional force of lock upper surface and can realize that selective miniature circuit breaker combined floodgate keeps and quick de-
Button, can avoid tripping mechanism from causing to thread off because structural member frictional force is larger the phenomenon do not fallen.
Brief description of the drawings
Fig. 1 (a) is the dimensional structure diagram of selective small size breaker mechanism, and Fig. 1 (b) is small-sized disconnected for selectivity
The partial enlarged drawing of road device tripping mechanism.
Fig. 2 is the schematic diagram of lock torsion spring.
Fig. 3 is the force analysis schematic diagram of selective small size breaker mechanism.
Label declaration in figure：1st, the first fixing axle P, 2, rack plate fixture, 3, multi-cascade lever, 4, lock, 4a, lock
Upper surface, the 5, lock torsion spring, 6, second fixing axle O, 7, tripping, 7a, tripping upper end extension board.
Specific embodiment
The technical scheme invented is described in detail below in conjunction with the accompanying drawings.The embodiment of the present invention is used for illustrating this hair
It is bright, rather than limiting the invention, in the protection domain of spirit and claims of the present invention, the present invention is made
Any modifications and changes, both fall within protection scope of the present invention.
Shown in tripping mechanism dimensional structure diagram such as Fig. 1 (a) of selective miniature circuit breaker, including the first fixing axle
P1, rack plate fixture 2, multi-cascade lever 3, lock 4, lock torsion spring 5, the second fixing axle O6, tripping 7.Rack plate fixture 2
Fore-end be provided with the through hole passed through for the first fixing axle P1, the rear end part of rack plate fixture 2 is provided with to be fixed for second
The through hole that axle O is passed through, multi-cascade lever 3, lock upper surface 4a, lock torsion spring 5 are set on the first fixing axle P, the lower end of tripping 7
It is set on the second fixing axle O6.
Lock torsion spring 5 uses the overall torsion spring structure of three torque arm supports as shown in Figure 2, and the torsion spring has two coils
Group and three torque arm supports, the initiating terminal of first coil group as lock torsion spring 5 upper bridge torque arm, the end end of first coil group
It is wound with and is constructed as the coil of the middle torque arm of lock torsion spring 5, the end end of coil construction is the initiating terminal of the second coil group,
The end end of the second coil group is the lower bridge torque arm of lock torsion spring 5.Three mounting means such as Fig. 1 of the overall torsion spring of torque arm support
B shown in (), the lower bridge torque arm of lock torsion spring 5 rides over the medial surface of lock 4, the middle torque arm of lock torsion spring 5 rides over rack plate and consolidates
Determine on the lower surface of part 2, the upper bridge torque arm of lock torsion spring 5 rides over the upper surface of multi-cascade lever 3, under such configuration, lock is turned round
Lock is fixed on home position by spring, and when there is linkage lock, lock upper surface 4a, multi-cascade lever 3 turn around the first fixing axle P
It is dynamic, when latch thread off after, lock torsion spring 5 allows lock 4 to reset, and after multi-cascade lever 3 is threaded off, lock torsion spring 5 allows multistage linking
Bar 3 resets.
Shown in Fig. 3, the length of the first fixing axle P to lock bottom is the first fixing axle P to lock upper surface length twice
, the angle of the buckle press direction arm of force that (position of axle B) produces when the second fixing axle O to tripping is in closing position end
It is 90 °, main spring force F under "on" positionBulletMaximum is reached, the axle B fulcrums between drive link 2 and drive link 1 have reached tripping
The least significant end (i.e. the position of axle B) of groove, and tripping upper end tripping upper end extension board 7a be compacted be overlapped on lock upper surface 4a on,
So that miniature circuit breaker is in "on" position.The tripping force F of lock can be drawn according to the force analysis of Fig. 3Thread off：
In formula (1), FBulletIt is the elastic pulling force of main spring；L1It is fulcrum D to main spring elastic pulling force FBulletThe arm of force；L2It is branch
Point D to power F1The arm of force；FPressureIt is main contact end pressure；L3It is fulcrum D to main contact end pressure FPressureThe arm of force；L8For fixing axle P is arrived
FFriction 2The arm of force, L9It is fixing axle P to lock tripping force FThread offThe arm of force, L9It is L82 times；θ4It is F1Pushing away in the horizontal direction
Power is with axle C relative to fixing axle P buckle presses FWithholdBetween angle；L6It is fulcrum O to power FWithholdThe arm of force；μ is the extension of tripping
Coefficient of friction between plate and lock end face.
Claims (5)
1. the tripping mechanism of selective miniature circuit breaker, it is characterised in that including：First fixing axle P（1）, rack plate fixture
（2）, multi-cascade lever（3）, lock（4）, be fixed on rack plate fixture（2）On driving multi-cascade lever（3）Or lock（4）
The lock torsion spring of reset（5）, the second fixing axle O（6）, tripping（7）, rack plate fixture（2）On be provided with for the first fixing axle P
（1）, the second fixing axle O（6）The through hole for passing through, multi-cascade lever（3）, lock（4）, lock torsion spring（5）It is set in the first fixation
Axle P（1）On, tripping（7）It is set in the second fixing axle O（6）On.
2. the tripping mechanism of selective miniature circuit breaker according to claim 1, it is characterised in that the lock torsion spring is tool
There is the overall structure of two coil groups and three torque arm supports, the initiating terminal of first coil group is used as lock torsion spring（5）Upper bridge
Torque arm, the end end of first coil group is wound with as lock torsion spring（5）The coil construction of middle torque arm, the end of coil construction
Tail end is the initiating terminal of the second coil group, and the end end of the second coil group is lock torsion spring（5）Lower bridge torque arm, lock torsion spring
（5）Lower bridge torque arm ride over lock（4）Medial surface, lock torsion spring（5）Middle torque arm ride over rack plate fixture（2）On,
Lock torsion spring（5）Upper bridge torque arm ride over multi-cascade lever（3）On.
3. the tripping mechanism of selective miniature circuit breaker according to claim 1, it is characterised in that the lock（4）Extend
There is lock upper surface（4a）, tripping（7）The buckle press produced during in closing position end compresses tripping upper end extension board（7a）
It is overlapped on lock upper surface（4a）On.
4. the tripping mechanism of selective miniature circuit breaker according to claim 1, it is characterised in that the first fixing axle P（1）Arrive
Lock（4）The length of bottom is the first fixing axle P（1）To lock upper surface（4a）The twice of length.
5. the tripping mechanism of selective miniature circuit breaker according to claim 1, it is characterised in that the second fixing axle O（6）Arrive
Tripping（7）The angle of the buckle press direction arm of force produced during in closing position end is 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143889.4A CN106783425B (en) | 2016-12-13 | 2016-12-13 | The tripping mechanism of selective miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143889.4A CN106783425B (en) | 2016-12-13 | 2016-12-13 | The tripping mechanism of selective miniature circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783425A true CN106783425A (en) | 2017-05-31 |
| CN106783425B CN106783425B (en) | 2019-01-25 |
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ID=58876195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611143889.4A Active CN106783425B (en) | 2016-12-13 | 2016-12-13 | The tripping mechanism of selective miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106783425B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6486417B1 (en) * | 1999-07-07 | 2002-11-26 | Fuji Electric Co., Ltd. | Circuit breaker on-off switch mechanism |
| CN102110553A (en) * | 2011-03-07 | 2011-06-29 | 法泰电器（江苏）股份有限公司 | Operating mechanism of selective protection switch |
| CN104916505A (en) * | 2015-06-25 | 2015-09-16 | 上海诺雅克电气有限公司 | Early actuation auxiliary low voltage circuit breaker and electrical interlock system |
-
2016
- 2016-12-13 CN CN201611143889.4A patent/CN106783425B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6486417B1 (en) * | 1999-07-07 | 2002-11-26 | Fuji Electric Co., Ltd. | Circuit breaker on-off switch mechanism |
| CN102110553A (en) * | 2011-03-07 | 2011-06-29 | 法泰电器（江苏）股份有限公司 | Operating mechanism of selective protection switch |
| CN104916505A (en) * | 2015-06-25 | 2015-09-16 | 上海诺雅克电气有限公司 | Early actuation auxiliary low voltage circuit breaker and electrical interlock system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106783425B (en) | 2019-01-25 |
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