CN103985568B - The dropproof double break contact structure of a kind of constant pressure - Google Patents
The dropproof double break contact structure of a kind of constant pressure Download PDFInfo
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- CN103985568B CN103985568B CN201410245011.6A CN201410245011A CN103985568B CN 103985568 B CN103985568 B CN 103985568B CN 201410245011 A CN201410245011 A CN 201410245011A CN 103985568 B CN103985568 B CN 103985568B
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Abstract
The invention discloses the dropproof double break contact structure of a kind of constant pressure, it comprises support and moving contact, the center of described support is provided with steady pin, described support offering with steady pin is intilted two bracket chute of symmetric points, support removable pin is provided with in described bracket chute, described moving contact is symmetric points offer two Long Circle contact apertures tilted to steady pin with steady pin, contact removable pin is provided with in described contact apertures, the two ends of described two contact removable pins connect touch spring with between the two ends of corresponding two support removable pins, the both sides of described moving contact with steady pin be symmetric points be respectively provided with one section of cam surface, on described support corresponding contact removable pin position on offer the gathering sill of circular arc.Above-mentioned constant pressure dropproof double break contact structure can not only be fallen by anti-contact; And contact pressure is constant within the scope of the excess of stroke of moving contact after closing.
Description
Technical field
The present invention relates to a kind of contact of breaker, particularly relate to the dropproof double break contact structure of a kind of constant pressure.
Background technology
Breaker of plastic casing is as the branch stage distribution apparatus of distribution system, and along with the continuous increase of net capacity and the needs of centralized power distribution, its breaking capacity of system requirements is more and more higher, so the extensive use in breaker of plastic casing of current-limiting type structure of contact terminal.Particularly the circuit breaker of double-breakpoint structure is born by two contacts due to arc energy, its breaking capacity can improve further and make it obtain in recent years to develop more widely, but the opening force of scolding of its contact of current-limiting type double-breakpoint structure is determined by the electric current between this contact, namely when current value increases to certain value, dynamic, fixed contact starts to scold out under loop electric power and the electrodynamic effect simultaneously of node, resistance now between contact increases fast and the mechanical periodicity of alternating current can cause the current attenuation flowed through between contact before circuit breaker cut-offs to be less than dynamic to electric power, the situation of opening force is scolded between fixed contact, at this moment, before by the contact of scolding out along with electrodynamic minimizing will be moved from scolding open position to make position direction, namely so-called contact is caused to fall phenomenon, contact falls and can cause the minimizing of arc voltage between contact and make arc reignition thus can not cut-off fault current.
As everyone knows, how double-breakpoint structure keeps double break contact when disjunction short circuit current because the resistance between contact increases fast and the mechanical periodicity of alternating current causes and to flow through current attenuation between contact to be less than between dynamic and static contact to electric power and to scold the contact of scolding out when opening force to fall before circuit breaker cut-offs, this ensures that dual-interruption point breaker reaches one of key element of more high breaking index, and this just needs to design a kind of dropproof structure of contact terminal; Moreover traditional contact of breaker pressure often linear relationship directly proportional with the excess of stroke of contact, the wearing and tearing of contact make the contact stroke that exceeds the quata make the corresponding minimizing of contact pressure that the temperature rise of circuit breaker can be made to exceed standard and cisco unity malfunction thereupon reducing, so the contact pressure considering again to make contact within the scope of the excess of stroke while the dropproof structure of contact terminal of design keeps definite value, to reach high breaking and to improve the object of circuit breaker electrical endurance.
Summary of the invention
The object of the present invention is to provide the dropproof double break contact structure of a kind of constant pressure, it has the advantages that within the scope of the excess of stroke that anti-contact falls with moving contact after closed, contact pressure is constant, to solve the problems referred to above that in prior art, breaker contact system exists.
For reaching this object, the present invention by the following technical solutions:
The dropproof double break contact structure of a kind of constant pressure, it comprises support and moving contact, the center of described support is provided with steady pin, described moving contact is centrosymmetric, its rear and front end is respectively arranged with on circuit breaker, the moving contact that lower two fixed contact points are corresponding, and described moving contact is arranged at rotationally on steady pin and its front and back end is stretched out outside support, wherein, described support offering with steady pin is intilted two bracket chute of symmetric points, support removable pin is provided with in described bracket chute, described moving contact is symmetric points offer two Long Circle contact apertures tilted to steady pin with steady pin, contact removable pin is provided with in described contact apertures, the two ends of described two contact removable pins connect touch spring with between the two ends of corresponding two support removable pins, the both sides of described moving contact with steady pin be symmetric points be respectively provided with one section of cam surface, described support removable pin is pressed over all the time on cam surface under the effect of touch spring, on described support corresponding contact removable pin position on offer the gathering sill of circular arc, described contact removable pin is pressed over all the time in gathering sill under the effect of touch spring.
Especially, described support is formed by connecting by coupling assembling parallel interval by two pieces of supporting plates, and the structure of described two pieces of supporting plates is identical, and described touch spring is arranged at the outside of two pieces of supporting plates.
Especially, described coupling assembling comprises the steady pin being connected to described two pieces of supporting plate centers and the connecting pin be symmetricly set in centered by steady pin between two pieces of supporting plates.
Especially, described supporting plate riveted joint steady pin is fixed by jump ring.
Beneficial effect of the present invention is, compared with prior art the dropproof double break contact structure of described constant pressure can scold in first of a short circuit current cycle reach necessarily scold out distance after no longer fall and continues to disjunction direction move structure, to prevent contact from it being moved from scolding open position to make position direction along with electrodynamic minimizing, so-called contact is namely caused to fall phenomenon and affect cut-offfing of circuit breaker.The shape simultaneously revising moving contact makes to keep the pressure of contact to be constant within the scope of the excess of stroke of moving contact after closing, thus realizes the dropproof double-breakpoint contact system of constant pressure.
Accompanying drawing explanation
Fig. 1 is the constant pressure dropproof double break contact structure structural representation that the specific embodiment of the invention 1 provides;
Fig. 2 is the "on" position schematic diagram of the dropproof double break contact structure of constant pressure that the specific embodiment of the invention 1 provides;
Fig. 3 be the dropproof double break contact structure of constant pressure that the specific embodiment of the invention 1 provides scold open state schematic diagram;
Fig. 4 be the constant pressure dropproof double break contact structure that the specific embodiment of the invention 1 provides scold out rear dropproof view.
In figure:
1, moving contact; 2, supporting plate; 3, steady pin; 4, jump ring; 5, connecting pin; 6, bracket chute; 7, support removable pin; 8, contact apertures; 9, contact removable pin; 10, touch spring; 11, cam surface; 12, gathering sill.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Refer to shown in Fig. 1 to Fig. 4, in the present embodiment, the dropproof double break contact structure of a kind of constant pressure comprises support and moving contact 1, described support comprises the identical supporting plate of two block structures 2, described two pieces of supporting plate 2 parallel interval are arranged, and two pieces of supporting plate 2 center riveted joints have steady pin 3, arrange jump ring 4 and are fixed, be symmetrically arranged with two connecting pins 5 between described two pieces of supporting plates 2 centered by steady pin 3 between the two ends of described steady pin 3 and supporting plate 2.Described moving contact 1 is centrosymmetric, its rear and front end is respectively arranged with on circuit breaker, the moving contact that lower two fixed contact points are corresponding, and described moving contact 1 is arranged on steady pin 3 and its front and back end rotationally stretches out outside supporting plate 2, described supporting plate 2 offers with steady pin 3 as intilted two bracket chute 6 of symmetric points, support removable pin 7 is provided with in described bracket chute 6, on described moving contact 1 with steady pin 3 for symmetric points offer two to steady pin 3 tilt Long Circle contact apertures 8, contact removable pin 9 is provided with in described contact apertures 8, the two ends of described two contact removable pins 9 connect touch spring 10 with between the two ends of corresponding two support removable pins 7, described touch spring 10 is totally four outsides being arranged at two pieces of supporting plates 2, what the both sides of described moving contact 1 were symmetric points with steady pin 3 is respectively provided with one section of cam surface 11, described support removable pin 7 is pressed over all the time on cam surface 11 under the effect of touch spring 10, on described supporting plate 2 corresponding contact removable pin 9 position on offer the gathering sill 12 of circular arc, described contact removable pin 9 is pressed over all the time in gathering sill 12 under the effect of touch spring 10.
During combined floodgate, from sub-gate position to before just having contacted with fixed contact under operating mechanism drives, at this moment moving contact 1 can not change with the relative position of support; Driving arm is continued motion by the stroke of operating mechanism, and now moving contact contacts with fixed contact and produces contact pressure and start to be separated with moving contact rotating shaft until operating mechanism moves to moving contact produce the stroke that exceeds the quata specified; Now act on the touch spring that moving contact produces pressure, owing to revising the direction for the groove in the moveable pins direction of fixed contact spring 10 on support, the line of force of its spring is made to draw high minimizing corresponding to the vertical range of the center of rotation of moving contact along with touch spring, to ensure moment that touch spring produces moving contact drawing high and change not with tension spring.Namely in the rotation process of support, the distance between support removable pin 7 and contact removable pin 9 can not change relatively, and therefore, the pressure produced by the elastic force of touch spring 10 is also relatively constant, thus reaches the effect of constant pressure.
When flowing through short circuit current between contact of breaker, moving contact 1 scolds to open because of electrodynamic repulsion force makes the peak of its cam surface 11 cross over support removable pin 7, at this moment support removable pin 7 enters the concave notches of cam surface 11 side of moving contact 1, touch spring 10 acts on generation one in concave notches makes moving contact continue to scolding evolution to the power of moving, thus the resistance between avoiding because of contact increases fast and the mechanical periodicity of alternating current can cause the current attenuation flowed through between contact before circuit breaker cut-offs to be less than dynamic to electric power, the situation of opening force is scolded between fixed contact, so that before by the contact of scolding out along with electrodynamic minimizing will be moved from scolding open position to make position direction, namely so-called contact is caused to fall phenomenon.Scolding in open procedure, contact apertures 8 is designed to Long Circle, can make moving contact 1 in rotation process, produce more high efficiency pressure.
Above embodiment has just set forth general principle of the present invention and characteristic; the present invention does not limit by above-mentioned example; without departing from the spirit and scope of the present invention, the present invention also has various change and change, and these changes and change all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (4)
1. the dropproof double break contact structure of constant pressure, it comprises support and moving contact, the center of described support is provided with steady pin, described moving contact is centrosymmetric, its rear and front end is respectively arranged with on circuit breaker, the moving contact that lower two fixed contact points are corresponding, and described moving contact is arranged at rotationally on steady pin and its front and back end is stretched out outside support, it is characterized in that, described support offering two with steady pin is the intilted bracket chute of symmetric points, support removable pin is provided with in described bracket chute, described moving contact is symmetric points offer two Long Circle contact apertures tilted to steady pin with steady pin, contact removable pin is provided with in described contact apertures, the two ends of described contact removable pin connect touch spring with between the two ends of corresponding support removable pin, the both sides of described moving contact with steady pin be symmetric points be respectively provided with one section of cam surface, described support removable pin is pressed over all the time on cam surface under the effect of touch spring, on described support corresponding contact removable pin position on offer the gathering sill of circular arc, described contact removable pin is pressed over all the time in gathering sill under the effect of touch spring.
2. the dropproof double break contact structure of constant pressure according to claim 1, it is characterized in that, described support is formed by connecting by coupling assembling parallel interval by two pieces of supporting plates, and the structure of described two pieces of supporting plates is identical, and described touch spring is arranged at the outside of two pieces of supporting plates.
3. the dropproof double break contact structure of constant pressure according to claim 2, is characterized in that, described coupling assembling comprises the steady pin being connected to described two pieces of supporting plate centers and the connecting pin be symmetricly set in centered by steady pin between two pieces of supporting plates.
4. the dropproof double break contact structure of constant pressure according to claim 2, is characterized in that, described supporting plate riveted joint steady pin is fixed by jump ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245011.6A CN103985568B (en) | 2014-06-04 | 2014-06-04 | The dropproof double break contact structure of a kind of constant pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245011.6A CN103985568B (en) | 2014-06-04 | 2014-06-04 | The dropproof double break contact structure of a kind of constant pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103985568A CN103985568A (en) | 2014-08-13 |
| CN103985568B true CN103985568B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410245011.6A Active CN103985568B (en) | 2014-06-04 | 2014-06-04 | The dropproof double break contact structure of a kind of constant pressure |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706059A (en) * | 2017-10-30 | 2018-02-16 | 北京明日电器设备有限责任公司 | A kind of anti-coincidence brake mechanism of breaker with double breaks and plastic case |
| CN107799367A (en) * | 2017-11-01 | 2018-03-13 | 常熟瑞特电气股份有限公司 | A kind of breaker dual-breakpoint multiple-piece moving contact |
| CN109637908B (en) * | 2018-12-21 | 2020-07-14 | 上海电器科学研究所（集团）有限公司 | Contact locking mechanism of molded case circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006527A (en) * | 1977-10-21 | 1979-05-02 | Dorman Smith Switchgear Ltd | Electric switch contact arm mounting |
| CN201725753U (en) * | 2010-06-28 | 2011-01-26 | 贵州长征开关制造有限公司 | Breaker contact system |
| CN202172051U (en) * | 2011-08-09 | 2012-03-21 | 无锡新宏泰电器科技股份有限公司 | Constant pressure dropproof double-breakpoint-contact system |
| CN203895277U (en) * | 2014-06-04 | 2014-10-22 | 无锡新宏泰电器科技股份有限公司 | Constant-pressure drop-prevention double-breakpoint contact structure |
-
2014
- 2014-06-04 CN CN201410245011.6A patent/CN103985568B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006527A (en) * | 1977-10-21 | 1979-05-02 | Dorman Smith Switchgear Ltd | Electric switch contact arm mounting |
| CN201725753U (en) * | 2010-06-28 | 2011-01-26 | 贵州长征开关制造有限公司 | Breaker contact system |
| CN202172051U (en) * | 2011-08-09 | 2012-03-21 | 无锡新宏泰电器科技股份有限公司 | Constant pressure dropproof double-breakpoint-contact system |
| CN203895277U (en) * | 2014-06-04 | 2014-10-22 | 无锡新宏泰电器科技股份有限公司 | Constant-pressure drop-prevention double-breakpoint contact structure |
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| CN103985568A (en) | 2014-08-13 |
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