CN203521342U - Contact system of breaker - Google Patents
Contact system of breaker Download PDFInfo
- Publication number
- CN203521342U CN203521342U CN201320684963.9U CN201320684963U CN203521342U CN 203521342 U CN203521342 U CN 203521342U CN 201320684963 U CN201320684963 U CN 201320684963U CN 203521342 U CN203521342 U CN 203521342U
- Authority
- CN
- China
- Prior art keywords
- moving contact
- contact
- shaft
- circuit breaker
- asessory shaft
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Breakers (AREA)
Abstract
A contact system of a breaker is arranged inside the breaker and comprises a moving contact and a static contact. The protruding end of the moving contact can be matched with the static contact. The connection end of the moving contact is rotatably arranged on a rotation shaft through a moving contact locating shaft. The connection end is provided with an accessory shaft. The accessory shaft is arranged under the moving contact locating shaft and the connection line between the axle center of the accessory shaft and the axle center of moving contact locating shaft and the protruding end of the moving contact form an obtuse angle. The accessory shaft is in a prismatic shape and the two ends of the accessory shaft extend out of the moving contact. A first side arm of a contact spring is limited by the rotation shaft, and a second side arm is stopped by the portion, extending out of the moving contact, of the accessory shaft. The contact spring is clamped between the accessory shaft and the rotation shaft in a compressing manner. The second side arm is in contact with the edge of the portion, extending out of the moving contact, of the accessory shaft. The contact system is compact in structure, good in reliability, and capable of effectively preventing contact drop and improving the breaking capacity of the breaker.
Description
Technical field
The utility model relates to low-voltage electrical technical field, specifically a kind of contact system of circuit breaker.
Background technology
In prior art, the moving contact of circuit breaker and fixed contact can be designed to the contrary sense of current conventionally, while there is Short-Circuit High Current in circuit, between dynamic and static contact, can produce electrodynamic repulsion force and make moving contact to disconnecting direction motion, between dynamic and static contact, can produce electric arc simultaneously; Along with moving contact is to disconnecting direction motion, the electrodynamic repulsion force between dynamic and static contact reduces gradually, and when electrodynamic repulsion force is not enough to overcome the elastic force of touch spring, moving contact can fall after rise and may cause secondary arcing thus under the effect of touch spring power.Therefore, the contact system of said structure has increased the arcing time, and this is very harmful to circuit breaker.
For this reason, in prior art, there is a kind of contact system that prevents that moving contact from falling after rise, as disclosed a kind of device that prevents the bounce-back of low-voltage circuit breaker moving contact in Chinese patent literature CN102427007A, the bare terminal end of its holder right half has two holder sidewalls that front and back are symmetrical, the round end of moving contact is stuck in two holder sidewalls, on two holder sidewalls, have the first coaxial hole, two sides, front and back at rotating shaft cavity are symmetrically arranged with draw-in groove, the center at draw-in groove place is the center of rotation of rotating shaft, on rotating shaft cavity lower surface and near right side, one groove is set, the first pivot pin two ends fixed card is in described draw-in groove, and gap is through the first hole on moving contact center of rotation hole and holder simultaneously, and the center of rotation of moving contact center of rotation Kong center and rotating shaft overlaps, in moving contact tail hole, through having second pivot pin parallel with the first pivot pin, the lower end of torsion spring are attached on rotating shaft cavity lower surface and are stuck in groove, two links of torsion spring are upwards pressed against on the outer ring at the second pivot pin two ends respectively.In said apparatus, the second bearing pin moves on the end face of two links of torsion spring, form the right side certain distance that moment the second pivot pin that dynamic and static contact separates need to move to the first pivot pin, make torsion spring to the power F of the second pivot pin the right side at the first pivot pin, this just needs moving contact in rotating shaft, to have enough spaces, is unfavorable for the Miniaturization Design of product; In addition, after being scolded out by electric power, moving contact runs into the vibrations and the falling that have certain amplitude after the limiting section of rotating shaft, and because the second pivot pin is that circular shaft is easy to activity on the end face of torsion spring, torsion spring to the power F of the second pivot pin to be easy to get back to the left side of the first pivot pin and is caused moving contact to fall after rise, therefore, this contact system reliability is poor.
Utility model content
In order to solve breaker contact system in above prior art, be unfavorable for product Miniaturization Design, and the poor problem of reliability, thereby the contact system of the circuit breaker of a kind of compact conformation, good reliability is provided.
For solving above-mentioned prior art problem, the utility model is achieved through the following technical solutions:
A contact system for circuit breaker, is arranged at the inside of described circuit breaker, and described contact system comprises moving contact and fixed contact, and described moving contact comprises external part and link; The described external part of described moving contact can coordinate with described fixed contact, and described link is arranged in rotating shaft rotationally by moving contact locating shaft, is also provided with for described moving contact being applied to the touch spring of elastic force in described rotating shaft; The described link of described moving contact is provided with asessory shaft, described asessory shaft is positioned at the below of described moving contact locating shaft and described asessory shaft axle center and the line in described moving contact locating shaft axle center and the described external part of described moving contact in obtuse angle, and described asessory shaft is that described moving contact is stretched out at prism-shaped and its two ends; The first side arm of described touch spring is spacing by described rotating shaft, the part that the second side arm is stretched out described moving contact by described asessory shaft stops, described touch spring is stuck between described asessory shaft and described rotating shaft compressively, and when "on" position, described the second side arm contacts with the seamed edge that described asessory shaft stretches out described moving contact part.
In the contact system of above-mentioned circuit breaker, described asessory shaft axle center and the line in described moving contact locating shaft axle center and the described external part of described moving contact are 110 °-135 °.
In the contact system of above-mentioned circuit breaker, described asessory shaft axle center and the line in described moving contact locating shaft axle center and the described external part of described moving contact are 125 °.
In the contact system of above-mentioned circuit breaker, described asessory shaft is quadrangular shape or polygon prism shape.
In the contact system of above-mentioned circuit breaker, described asessory shaft and the riveted joint of described moving contact are fixing.
In the contact system of above-mentioned circuit breaker, described touch spring is torsion spring.
In the contact system of above-mentioned circuit breaker, described second side arm of described touch spring is two support arms, and the part that two described support arms are stretched out described moving contact by described asessory shaft two ends respectively stops.
In the contact system of above-mentioned circuit breaker, described touch spring is arranged in described rotating shaft by spring locating shaft.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) contact system of the circuit breaker that the utility model provides, the link of its moving contact is also connected with rotating shaft by asessory shaft, asessory shaft is positioned at the below of moving contact locating shaft and asessory shaft axle center and the line in moving contact locating shaft axle center and the external part of moving contact in obtuse angle, and asessory shaft is that moving contact is stretched out at prism-shaped and its two ends; The first side arm of touch spring is spacing by rotating shaft, the part that the second side arm is stretched out moving contact by asessory shaft stops, touch spring is stuck between asessory shaft and rotating shaft compressively, and when "on" position, the second side arm contacts with the seamed edge that asessory shaft stretches out moving contact part.Under "on" position, touch spring application of force on asessory shaft makes moving contact reliably contact with fixed contact, while passing into Short-Circuit High Current in circuit breaker, moving contact is owing to being subject to electrodynamic action Bei Chi Kaiyuan City from fixed contact, during to a certain state, the application of force direction change of touch spring on asessory shaft disconnects rapidly moving contact and is finally still in off-state, prevent that contact falling from causing secondary arcing, can strengthen the arc extinguishing ability of circuit breaker.Because asessory shaft adopts prism-shaped axle, there is a clear and definite stressed flex point (being the seamed edge of axle), when torsion spring, giving the point of application of the second pivot pin crosses after flex point, the direction of power can change immediately, do not need the second pivot pin to move to the opposite side of the first pivot pin, save the space of moving contact, be conducive to product Miniaturization Design; Even if moving contact scolds out rear chance rotating shaft limiting section to have vibrations and falling by a small margin, the point of application of torsion spring is not crossed flex point moving contact and still can be rested on and scold open position, and reliability is strong.
(2) contact system of the circuit breaker that the utility model provides, utilize mechanical movement principle to change the force direction that is subject to of contact, contact is scolded out after all the time in open position, reduced the arcing time, after operating mechanism drop-away reset, contact resets, and guarantees combined floodgate next time; And can accelerate contact breaking speed, and reduce the arcing time, improved the breaking capacity of circuit breaker, asessory shaft adopts the riveted joint of prism-shaped axle and asessory shaft and moving contact fixing more reliable, simple in structure, easy for installation.
(3) contact system of the circuit breaker that the utility model provides, wherein asessory shaft axle center and the line in moving contact locating shaft axle center and the external part of moving contact are 110 °-135 °, preferably be 125 °, can guarantee the contact of dynamic and static contact, guarantee that properties of product are reliable.
(4) contact system of the circuit breaker that the utility model provides, wherein asessory shaft preferably adopts quadrangular shape or polygon prism shape, facilitate on the one hand machine-shaping, square shaft (quadrangular shape asessory shaft) or polygon shaft (polygon prism shape asessory shaft) are more fixing and reliable on the other hand.
(5) contact system of the circuit breaker that the utility model provides, wherein the second side arm of touch spring is two support arms, the part that two support arms are stretched out moving contact by asessory shaft two ends respectively stops, above-mentioned design makes moving contact stress equalization, further guarantees that properties of product are reliable, stable.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein
Fig. 1 is the schematic diagram of circuit breaker in "on" position that adopts the utility model contact system;
Fig. 2 adopts the contact of breaker of the utility model contact system to be subject to electrodynamic action to scold out the schematic diagram of rear inactive state;
Fig. 3 is the schematic diagram that in the contact system of the utility model circuit breaker, switch on of moving contact state is subject to force direction;
Fig. 4 is subject to the schematic diagram of force direction after moving contact is scolded out by electric power in the contact system of the utility model circuit breaker;
Fig. 5 is the schematic diagram of touch spring in the contact system of the utility model circuit breaker.
In figure, Reference numeral is expressed as: 1-moving contact, 11-external part, 12-link, 2-moving contact locating shaft, 3-rotating shaft, 4-asessory shaft, 5-touch spring, 51-the first side arm, 52-the second side arm, 6-spring locating shaft, 7-pedestal, 8-fixed contact.
Embodiment
As depicted in figs. 1 and 2, be the preferred embodiment of the contact system of the utility model circuit breaker.
In the present embodiment, described contact system is applied in current-limiting type molded case breaker, and described contact system is arranged at the inside of described circuit breaker, and described contact system comprises moving contact 1 and fixed contact 8, and described fixed contact 8 is installed on the pedestal 7 of described circuit breaker.
Described moving contact 1 comprises external part 11 and link 12, described external part 11 can coordinate with described fixed contact 8, described link 12 is arranged in rotating shaft 3 rotationally by moving contact locating shaft 2, and described rotating shaft 3 is arranged on described pedestal 7 and by the operating mechanism of described circuit breaker and controls.In described rotating shaft 3, be also provided with for described moving contact 1 being applied to the touch spring 5 of elastic force, described touch spring 5 is torsion spring, and it is arranged in described rotating shaft 3 by spring locating shaft 6.
The described link 12 of described moving contact 1 is provided with asessory shaft 4, and in the present embodiment, described asessory shaft 4 is fixing with described moving contact 1 riveted joint.Described asessory shaft 4 is positioned at the below of described moving contact locating shaft 2 and described asessory shaft 4 axle center and the line in described moving contact locating shaft 2 axle center and the described external part 11 of described moving contact 1 in obtuse angle, angle span is 110 °-135 °, chooses in the present embodiment 125 °.Described asessory shaft 4 is for stretching out described moving contact 1 in prism-shaped and its two ends, and in the present embodiment, described asessory shaft 4 is quadrangular shape axle.The first side arm 51 of described touch spring 5 is spacing by described rotating shaft 3, the part that the second side arm 52 is stretched out described moving contact 1 by described asessory shaft 4 stops, described touch spring 5 is stuck between described asessory shaft 4 and described rotating shaft 3 compressively, and when "on" position, described the second side arm 52 contacts with the seamed edge that described asessory shaft 4 stretches out described moving contact 1 part, as shown in Figure 1.Described second side arm 52 of described touch spring 5 is two support arms, and the part that two described support arms are stretched out described moving contact 1 by described asessory shaft 4 two ends respectively stops, as shown in Figure 5.
As shown in Figure 3 and Figure 4, when described circuit breaker is during in "on" position, the power that described second side arm 52 of described touch spring 5 imposes on described asessory shaft 4 makes described moving contact 1 close to described fixed contact 8 directions, to guarantee that dynamic and static contact can reliably contact.When being subject to electrodynamic repulsion force effect, described moving contact 1 leaves described fixed contact 8 after certain distance, described second side arm 52 of described touch spring 5 walks around the seamed edge of described asessory shaft 4 and a cylinder of described asessory shaft 4 contacts, simultaneously described asessory shaft 4 is become by force direction to make described moving contact 1 continue to keep leaving the direction of motion of described fixed contact 8, until described moving contact 1 is static after contacting with the limiting section of described rotating shaft 3, thereby prevent that described moving contact 1 from scolding out rear falling.
In addition, after described moving contact 1 is scolded out by electric power, the elastic force of electric power and described touch spring 5 is a pair of opposite effect power, described in when electric power is greater than spring force, moving contact 1 is to disconnecting direction motion, described the second side arm 52 that moves to described touch spring 5 when described moving contact 1 cross described asessory shaft 4 seamed edge but on the cylinder of described asessory shaft 4 during the application of force, the elastic force direction of described touch spring 5 changes also and electric power stack, make described moving contact 1 accelerate disjunction, until described moving contact 1 is static after contacting with the limiting section of described rotating shaft 3.
In other embodiments, described asessory shaft 4 also can be elected triangular prism shape or polygon prism shape as required.
In other embodiments, the angle of the line in described asessory shaft 4 axle center and described moving contact locating shaft 2 axle center and the described external part 11 of described moving contact 1 also can value be 110 °, 115 °, 120 °, 130 °, 135 ° etc., all can realize the purpose of this utility model.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all execution modes.And among the protection range that the apparent variation of being extended out thus or change are still created in the utility model.
Claims (8)
1. a contact system for circuit breaker, is arranged at the inside of described circuit breaker, and described contact system comprises moving contact (1) and fixed contact (8), and described moving contact (1) comprises external part (11) and link (12); The described external part (11) of described moving contact (1) can coordinate with described fixed contact (8), it is upper that described link (12) is arranged on rotating shaft (3) rotationally by moving contact locating shaft (2), is also provided with for described moving contact (1) being applied to the touch spring (5) of elastic force in described rotating shaft (3); It is characterized in that: the described link (12) of described moving contact (1) is provided with asessory shaft (4), described asessory shaft (4) is positioned at the below of described moving contact locating shaft (2) and described asessory shaft (4) axle center and the line in described moving contact locating shaft (2) axle center and the described external part (11) of described moving contact (1) in obtuse angle, and described asessory shaft (4) is for stretching out described moving contact (1) in prism-shaped and its two ends; First side arm (51) of described touch spring (5) is spacing by described rotating shaft (3), the part that the second side arm (52) is stretched out described moving contact (1) by described asessory shaft (4) stops, described touch spring (5) is stuck between described asessory shaft (4) and described rotating shaft (3) compressively, and when "on" position, described the second side arm (52) contacts with the seamed edge that described asessory shaft (4) stretches out described moving contact (1) part.
2. the contact system of circuit breaker according to claim 1, is characterized in that: described asessory shaft (4) axle center and the line in described moving contact locating shaft (2) axle center and the described external part (11) of described moving contact (1) are 110 °-135 °.
3. the contact system of circuit breaker according to claim 2, is characterized in that: described asessory shaft (4) axle center and the line in described moving contact locating shaft (2) axle center and the described external part (11) of described moving contact (1) are 125 °.
4. according to the contact system of the arbitrary described circuit breaker of claim 1-3, it is characterized in that: described asessory shaft (4) is quadrangular shape or polygon prism shape.
5. the contact system of circuit breaker according to claim 4, is characterized in that: described asessory shaft (4) is fixing with described moving contact (1) riveted joint.
6. the contact system of circuit breaker according to claim 5, is characterized in that: described touch spring (5) is torsion spring.
7. the contact system of circuit breaker according to claim 6, it is characterized in that: described second side arm (52) of described touch spring (5) is two support arms, the part that two described support arms are stretched out described moving contact (1) by described asessory shaft (4) two ends respectively stops.
8. the contact system of circuit breaker according to claim 7, is characterized in that: described touch spring (5) is arranged in described rotating shaft (3) by spring locating shaft (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684963.9U CN203521342U (en) | 2013-10-31 | 2013-10-31 | Contact system of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684963.9U CN203521342U (en) | 2013-10-31 | 2013-10-31 | Contact system of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203521342U true CN203521342U (en) | 2014-04-02 |
Family
ID=50380232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320684963.9U Withdrawn - After Issue CN203521342U (en) | 2013-10-31 | 2013-10-31 | Contact system of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203521342U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531409A (en) * | 2013-10-31 | 2014-01-22 | 德力西电气有限公司 | Contact system of circuit breaker |
| CN105097375A (en) * | 2015-09-14 | 2015-11-25 | 北京明日电器设备有限责任公司 | High-breaking molded case circuit breaker |
| CN105551840A (en) * | 2016-02-03 | 2016-05-04 | 首瑞（天津）电气设备有限公司 | Contact rotation shaft system and low-voltage switch |
-
2013
- 2013-10-31 CN CN201320684963.9U patent/CN203521342U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531409A (en) * | 2013-10-31 | 2014-01-22 | 德力西电气有限公司 | Contact system of circuit breaker |
| CN105097375A (en) * | 2015-09-14 | 2015-11-25 | 北京明日电器设备有限责任公司 | High-breaking molded case circuit breaker |
| CN105551840A (en) * | 2016-02-03 | 2016-05-04 | 首瑞（天津）电气设备有限公司 | Contact rotation shaft system and low-voltage switch |
| WO2017133317A1 (en) * | 2016-02-03 | 2017-08-10 | 首瑞（天津）电气设备有限公司 | Contact rotating shaft system and low-voltage switch |
| CN105551840B (en) * | 2016-02-03 | 2018-08-21 | 首瑞（天津）电气设备有限公司 | Contact rotating shaft system and low tension switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203521342U (en) | Contact system of breaker | |
| CN204577267U (en) | The overlapping switching mechanism of neutral pole and automatic transfer switching electric appliance | |
| CN203026469U (en) | Moving contact component of moulded case circuit breaker | |
| CN103531409A (en) | Contact system of circuit breaker | |
| CN104157490A (en) | High-voltage direct current contactor contact system | |
| CN101194334A (en) | Contact system, especially for a switchgear | |
| CN202487498U (en) | Bidirectional magnetic field arc extinction device | |
| CN103000465B (en) | Contact system of novel high-capacity medium-voltage direct current breaker | |
| CN207587673U (en) | Moving contact component and device for switching may be reversed | |
| CN108987138A (en) | Electrical contact system | |
| CN204303699U (en) | The anti-contact falling device of link type | |
| CN103985568B (en) | The dropproof double break contact structure of a kind of constant pressure | |
| CN207529897U (en) | Electric arc separating mechanism and breaker of plastic casing | |
| CN203445072U (en) | Rebound-prevention device used for circuit breaker mechanism | |
| CN104715980A (en) | Magnetic reserved tripping protection mechanism | |
| CN102420082B (en) | Device for preventing moving contact of moulded case circuit breaker from falling | |
| CN101989516A (en) | Moving contact device of moulded case circuit breaker | |
| CN104201074A (en) | Energy-saving miniature circuit breaker | |
| CN106783442B (en) | A kind of contact system of dual-interruption point breaker | |
| CN207338164U (en) | Electrical contact system | |
| CN208422726U (en) | A kind of high-voltage circuitbreaker interlock protection device | |
| CN201788917U (en) | Contact device for N pole incapable of extinguishing arc | |
| CN208690117U (en) | A kind of structure of contact terminal | |
| CN202018900U (en) | Auxiliary switch of easily cutting current between contacts | |
| CN202150426U (en) | Breaker dual-breakpoint mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140402 Effective date of abandoning: 20160831 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |