CN102945774B - Small circuit breaker - Google Patents
Small circuit breaker Download PDFInfo
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- CN102945774B CN102945774B CN201210442663.XA CN201210442663A CN102945774B CN 102945774 B CN102945774 B CN 102945774B CN 201210442663 A CN201210442663 A CN 201210442663A CN 102945774 B CN102945774 B CN 102945774B
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- Prior art keywords
- circuit breaker
- handle
- tripping
- arc
- moving contact
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- 230000000694 effects Effects 0.000 claims description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 6
- 239000010931 gold Substances 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention discloses a small circuit breaker, which comprises a shell, a handle, a link mechanism and tripping units; the shell is provided with a fixed contact and a movable contact; the handle is pivotally supported on the shell; the link mechanism is connected between the movable contact and the handle, and responds to the pivotal operation of the handle to connect and disconnect the movable contact and the fixed contact; and the tripping units detect overcurrent flowing between the movable contact and the fixed contact, and are so constructed as to respond to the overcurrent to operate the link mechanism to forcibly separate the movable contact and the fixed contact. The small circuit breaker provided by the invention has a simple breaking structure, and is structurally flexible and highly stable and reliable, the electrical characteristics of the circuit breaker are effectively improved, the technical problems, such as breaking failure and false breaking, are effectively prevented, and the accuracy and safety of breaking are guaranteed.
Description
Technical field
The present invention relates to electronic circuit control technical field, and in particular to a kind of miniature circuit breaker.
Background technology
Circuit breaker (English name: circuit-breaker; circuit breaker) refer to the electric current that can close, carry and cut-off under normal loop condition, and can close, the switching device of carrying and the electric current under cut-offfing abnormal loop condition (comprising short circuit condition) in official hour.Circuit breaker can be used to distribute electric energy; infrequently start asynchronous motor; protection is carried out to power circuit and motor etc., can automatic shutdown circuit when serious overload or short circuit and the fault such as under-voltage occur for they, its function is equivalent to Fuse switch and the combination of crossing underheat relay etc.And generally do not need to change parts after disjunction fault current.At present, obtain a wide range of applications.
But; in the prior art; circuit breaker particularly miniature circuit breaker also exists following technological deficiency, due to the narrow space in circuit breaker, the gearing structure relative complex that gathers; and transmission between mechanical structure is loaded down with trivial details; cause occurring mechanism blockage in long-time operation process, coupling part pivot pin comes off, and mechanism's sky is closed; and then occur refusing point, situation of by mistake grading, do not play the effect of protective device.In addition, also due to the factor such as complexity and instability of mechanical structure, cause the space of circuit breaker internal to be unfavorable for arc extinguishing extinguishing arc, and then cause disjunction inaccurate, cause danger what is more.
Summary of the invention
In view of this, the present invention is intended to solve the disappearance that prior art is intended to solve prior art.The invention provides a kind of miniature circuit breaker, it comprises: housing, and described housing is provided with fixed contact and moving contact; Handle, described handle is supported on described housing pivotally; Link gear, is connected between described moving contact and described handle, and makes described moving contact be connected with described fixed contact and disconnect in response to the pivot action of described handle; And tripgear, detect the overcurrent flowed between described moving contact and described fixed contact, described tripgear is configured in response to described overcurrent to operate described link gear, forcibly to make described moving contact be separated with described fixed contact.
Further, described link gear, comprising: tripping, is arranged on described housing, around axis of rotation, and is connected to described housing by extension spring; Snap close, is snapped in described tripping, and is connected with described handle by pull bar; Described moving contact, is movably set in described tripping by contact supporting and torsion spring.
Further, described tripping, comprising: body, and is arranged at the circular arc flywheel of described body both sides, and the wheel rim of described flywheel is provided with groove.
Further, described tripping, the circular arc flywheel of body side, is arranged at the interlock opening part of described housing.
Further, described tripgear comprises electromagnetic trip device and thermal tripping device.
Further, described electromagnetic trip device comprises: coil, is set around on coil rack; Iron core, is arranged in described coil; Holder, is riveting on described skeleton; Push rod one end is fixedly connected with described iron core, and the other end inserts in holder; Reaction spring, is sheathed on described push rod.
Further, described thermal tripping device comprises: two gold, and connects the release lever of described two gold and link gear.
Further, described circuit breaker also comprises: energy storage indication piece, is connected with described handle, has separating brake instruction unit, combined floodgate instruction unit; And discovering window, be arranged on described housing, optionally manifest described separating brake instruction unit and described combined floodgate instruction unit via it.
Further, described moving contact has silver-colored composition metal contact.
In sum, miniature circuit breaker provided by the invention, disjunction structure is simple, flexible structure, stability and reliability high, effectively improve the electrical characteristic of circuit breaker, effectively prevent to refuse point, technical problem of by mistake grading, ensure that accuracy and the fail safe of disjunction.
Accompanying drawing explanation
Figure 1 shows that the structural representation of the miniature circuit breaker that one embodiment of the invention provides;
Figure 2 shows that the structural representation of the link gear that one embodiment of the invention provides;
Figure 3 shows that the structural representation of tripping in the link gear that one embodiment of the invention provides;
Figure 4 shows that the structural representation of the electromagnetic trip device that one embodiment of the invention provides;
Figure 5 shows that the structural representation of the energy storage indication piece that one embodiment of the invention provides.Embodiment
For making object of the present invention, feature becomes apparent, and is further described the specific embodiment of the present invention below in conjunction with accompanying drawing.
Refer to Fig. 1, it is depicted as the structural representation of the miniature circuit breaker that one embodiment of the invention provides.
This miniature circuit breaker, it comprises: housing 100, and described housing is provided with fixed contact 110 and moving contact 120; Handle 130, described handle is supported on described housing 100 pivotally; Link gear 140, is connected between described moving contact 120 and described handle 130, and makes described moving contact 120 be connected with described fixed contact 110 and disconnect in response to the pivot action of described handle 130; And tripgear 150,160; detect the overcurrent flowed between described moving contact 120 and described fixed contact 110; described tripgear 150,160 is configured in response to described overcurrent to operate described link gear 140; forcibly to make described moving contact 120 be separated with described fixed contact 110; thus reach the effect of disjunction, achieve and the disjunction of load appliance is protected.
In an embodiment of the present invention, refer to Fig. 2 and combine see Fig. 1, it is depicted as the structural representation of the link gear that one embodiment of the invention provides.
Described link gear 140, comprising: tripping 141, is arranged on described housing 100, rotates around rotating shaft 147, and is connected to described housing 100 by extension spring 143; Snap close 142, is snapped in described tripping 141, and is connected with described handle 130 by pull bar 144; Described moving contact 120, is movably set in described tripping 141 by contact supporting 145 and torsion spring 146.And tripping is in the prior art connected with housing by spring, when temperature or external force cause housing distortion, just tripping may be caused ineffective, make whole circuit breaker can not normal running, the structure that the embodiment of the present invention provides installs torsion spring 146 in link gear 140 inside, moving contact 120 is arranged in described tripping 141, can avoids the impact of outer bound pair moving contact 120 activity thus, ensure that and the stability that moving contact 120 works improve the fail safe of circuit breaker.
The link gear structure adopting the embodiment of the present invention to provide is simple, mechanical flexibility, stability and reliability are high, ensure that the accuracy of disjunction.
In an embodiment of the present invention, refer to Fig. 3 and combine see Fig. 1, it is depicted as the structural representation of tripping in the link gear that one embodiment of the invention provides.
Described tripping 141, comprising: body 310, and is arranged at the circular arc flywheel 320,330 of described body both sides, and the wheel rim of described flywheel is provided with groove 321.
As everyone knows, the effect of circuit breaker cuts off and connects load circuit, and disengagement failure circuit, and Accident prevention expands, and ensures safe operation.And primary cut-out wants head to have very large destruction, and make the time lengthening of open circuit, these electric arcs can elongate still to burn away to 2m and not extinguish.Therefore arc extinguishing is the problem that primary cut-out must solve.
Flywheel is offered groove not only there is reduction materials cost, reduce the effect of noise, and can by the groove offered, regulate the air flowing in circuit breaker, a large amount of gases of breaking arc generation are played to the effect of guiding, it is free that rapid cooling electric arc weakens heat, on the other hand by regulating compound and the diffusion of air-flow arc blow-out elongating arc reinforcing band charged particle, charged particle in arc gap is dispelled simultaneously, recover rapidly the dielectric strength of medium, improve the effect of arc blow-out blow-out.
In an embodiment of the present invention, the body 310 side circular arc flywheel 320 of described tripping, is arranged at the interlock opening part of described housing 100.When disjunction in parallel, multiple circuit breaker is interconnected via interlock opening by linkage piece, the electric arc produced when disjunction can fly out by this interlock opening, cause unnecessary trouble and danger, and the design of the embodiment of the present invention utilizes the insertion end of groove as linkage piece of circular arc flywheel, and form arcing cover by electric arc and interlock separated by openings with flywheel body, avoid outside electric arc and fly, ensure that the safety of disjunction.
In an embodiment of the present invention, refer to Fig. 4 and combine see Fig. 1, it is depicted as the structural representation of the electromagnetic trip device that one embodiment of the invention provides.
Described tripgear comprises electromagnetic trip device 150 and thermal tripping device 160.
Described electromagnetic trip device 150 comprises: coil 151, is set around on coil rack 152; Unshakable in one's determination 153, be arranged in described coil 151; Holder 154, is riveting on described skeleton 152; Push rod 155 one end is fixedly connected with described unshakable in one's determination 153, and the other end inserts in holder 154; Reaction spring 156, is sheathed on described push rod 155.
When short circuit, the magnetic field that big current (general 10 to 12 times) is produced by coil overcomes reaction spring, and push rod advances along holder, drives moving contact to be separated with fixed contact, reach the effect of quick disjunction by push rod top pressure link gear 140.
Refer to Fig. 1, in an embodiment of the present invention, described thermal tripping device 160 comprises: two golden 161, and connects the release lever 162 of described two gold 161 and link gear.
When the load, ER effect is large, and caloric value is aggravated, and two gold is deformed to a certain degree pushing mechanism action (electric current is larger, and operate time is shorter) to be separated moving contact and fixed contact by release lever, reaches the effect of disjunction protection.
Refer to Fig. 5, it is depicted as the structural representation of the energy storage indication piece that one embodiment of the invention provides.Described circuit breaker also comprises: energy storage indication piece 170, is connected with described handle, has separating brake instruction unit 171, combined floodgate instruction unit 172; And discovering window 180, be arranged on described housing, optionally manifest described separating brake instruction unit 171 and described combined floodgate instruction unit 172 via it.Can know from circuit breaker external deciliter situation judging circuit breaker thus, conveniently monitor.
In an embodiment of the present invention, described moving contact has silver-colored composition metal contact.Reduce contact resistance, improve conductivity, the less possibility with reducing arcing, improves agility and the accuracy of the disjunction of whole circuit breaker further.
In sum, the miniature circuit breaker that the embodiment of the present invention provides, disjunction structure is simple, flexible structure, stability and reliability high, effectively improve the electrical characteristic of circuit breaker, effectively prevent to refuse point, technical problem of by mistake grading, ensure that accuracy and the fail safe of disjunction.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (7)
1. a miniature circuit breaker, comprising:
Housing, described housing is provided with fixed contact and moving contact;
Handle, described handle is supported on described housing pivotally;
Link gear, is connected between described moving contact and described handle, and makes described moving contact be connected with described fixed contact and disconnect in response to the pivot action of described handle; And
Tripgear, detects the overcurrent flowed between described moving contact and described fixed contact, and described tripgear is configured in response to described overcurrent to operate described link gear, forcibly to make described moving contact be separated with described fixed contact;
Described link gear, comprising:
Tripping, is arranged on described housing, around axis of rotation, and is connected to described housing by extension spring;
Snap close, is snapped in described tripping, and is connected with described handle by pull bar;
Described moving contact, is movably set in described tripping by contact supporting and torsion spring;
It is characterized in that,
Described tripping, comprising: body, and is arranged at the circular arc flywheel of described body both sides, the wheel rim of described flywheel is provided with groove, for regulating the air in circuit breaker to flow, a large amount of gases of breaking arc generation are played to the effect of guiding, cooling electric arc weakens hot free rapidly; And for regulating compound and the diffusion of air-flow arc blow-out elongating arc reinforcing band charged particle, the charged particle in arc gap is dispelled, recover the dielectric strength of medium, promote arc blow-out arc blowout effect. simultaneously
2. miniature circuit breaker according to claim 1, is characterized in that, described tripping, the circular arc flywheel of body side, is arranged at the interlock opening part of described housing.
3. miniature circuit breaker according to claim 1, is characterized in that, described tripgear comprises electromagnetic trip device and thermal tripping device.
4. miniature circuit breaker according to claim 3, is characterized in that, described electromagnetic trip device comprises: coil, is set around on coil rack; Iron core, is arranged in described coil; Holder, is riveting on described skeleton; Push rod one end is fixedly connected with described iron core, and the other end inserts in holder; Reaction spring, is sheathed on described push rod.
5. miniature circuit breaker according to claim 3, is characterized in that, described thermal tripping device comprises: two gold, and connects the release lever of described two gold and link gear.
6. miniature circuit breaker according to claim 1, is characterized in that, also comprises:
Energy storage indication piece, is connected with described handle, has separating brake instruction unit, combined floodgate instruction unit; And
Discovering window, is arranged on described housing, optionally manifests described separating brake instruction unit and described combined floodgate instruction unit via it.
7. miniature circuit breaker according to claim 1, is characterized in that, described moving contact has silver-colored composition metal contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442663.XA CN102945774B (en) | 2012-11-08 | 2012-11-08 | Small circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442663.XA CN102945774B (en) | 2012-11-08 | 2012-11-08 | Small circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102945774A CN102945774A (en) | 2013-02-27 |
| CN102945774B true CN102945774B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210442663.XA Active CN102945774B (en) | 2012-11-08 | 2012-11-08 | Small circuit breaker |
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| Country | Link |
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| CN (1) | CN102945774B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231926A (en) * | 2008-02-21 | 2008-07-30 | 江苏西蒙智控设备有限公司 | Actuating mechanism of small size circuit breaker |
| CN102709125A (en) * | 2012-05-18 | 2012-10-03 | 东莞基业电气设备有限公司 | Operating mechanism of small circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623257B (en) * | 2011-01-28 | 2014-10-29 | Ls产电株式会社 | Trip alarm apparatus for small circuit breaker |
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2012
- 2012-11-08 CN CN201210442663.XA patent/CN102945774B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231926A (en) * | 2008-02-21 | 2008-07-30 | 江苏西蒙智控设备有限公司 | Actuating mechanism of small size circuit breaker |
| CN102709125A (en) * | 2012-05-18 | 2012-10-03 | 东莞基业电气设备有限公司 | Operating mechanism of small circuit breaker |
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| Publication number | Publication date |
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| CN102945774A (en) | 2013-02-27 |
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Effective date of registration: 20160504 Address after: 302 room 4, building 2, pearl garden, Yuejin Road, Anhui, Huangshan City 242700, China Patentee after: Zhang Jilong Patentee after: Zhao Lan Address before: 302 room 4, building 2, pearl garden, Yuejin Road, Anhui, Huangshan City 242700, China Patentee before: Zhang Jilong |
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| TR01 | Transfer of patent right |
Effective date of registration: 20241030 Address after: 4th Floor, 397 Binhai 21st Road, Xinghai Street, Wenzhou Bay New Area, Wenzhou City, Zhejiang Province, 325000 Patentee after: ZHEJIANG YIDEK TECHNOLOGY CO.,LTD. Country or region after: China Address before: 242700 Room 302, Unit 4, Building 2, Mingzhuyuan, Yuejin Road, Mount Huangshan City, Anhui Province Patentee before: Zhang Jilong Country or region before: China Patentee before: Zhao Lan |