CN2785127Y - Contact structure of breaker - Google Patents
Contact structure of breaker Download PDFInfo
- Publication number
- CN2785127Y CN2785127Y CN 200520040893 CN200520040893U CN2785127Y CN 2785127 Y CN2785127 Y CN 2785127Y CN 200520040893 CN200520040893 CN 200520040893 CN 200520040893 U CN200520040893 U CN 200520040893U CN 2785127 Y CN2785127 Y CN 2785127Y
- Authority
- CN
- China
- Prior art keywords
- movable
- cylinder
- feeler lever
- movable feeler
- bayonet lock
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a contact structure of a breaker includes a movable contact bar, a stationary contact bar provided with a curvature, a rotation axle and a contact spring. A cylinder is equipped on the movable contact bar. The cylinder and the center of rotation of the movable contact bar are coaxial. A dishing clamping opening is equipped on the cylinder. A radical direction bore is equipped on the rotation axle. A movable bayonet lock is breadthwise equipped in the radical direction bore. An elastic pressing plate is equipped on the movable bayonet lock. The elastic pressing plate makes the movable bayonet lock be tightly pressed on the cylinder of the movable contact bar. When a failure current appears, the mechanism can clamp the movable contact bar which is opened to avoid the second drawing arc or the reclose and obtain the purpose of the current limiting protection.
Description
Technical field
The utility model relates to a kind of contact mechanism of circuit breaker, and when big fault current took place, it can fast cut-off circuit also guarantee not make fault current conducting once more, plays the current-limiting protection effect.
Background technology
The contact system of circuit breaker can be connected under the drive of operating mechanism or the branch deenergizing; also be provided with release in the circuit breaker simultaneously, when overload or short circuit took place circuit, release can drive operating mechanism separated dynamic and static contact; cut off circuit, play the effect of protection.Yet the protective effect of release is limited; because the action of release is slow relatively, after the release action, also to dynamic and static contact be separated through a series of mechanical transfer process; for king-sized fault current, this reaction speed can't guarantee circuit safety.
The electrodynamic repulsion force that utilizes fault current to produce directly makes dynamic and static contact separate, and can reach the purpose of fast cut-off circuit, and this technology has obtained application in the existing circuit breaker contact system.A kind of contact system that comes to this shown in Figure 1, stationary contact bar 1a is the bending of U type, movable feeler lever 2a is installed on the rotating shaft 4a, rotating shaft 4a is connected with operating mechanism and can rotates under the drive of operating mechanism, the end of spring 3a is pressed on the movable feeler lever 2a, makes the certain closed end pressure of maintenance between the dynamic and static contact.When dynamic and static contact closure, stationary contact bar 1a is parallel with the direction of movable feeler lever 2a, and electric current makes and produces electrodynamic repulsion force between them, and the electrodynamic repulsion force that powerful fault current produces is enough to make movable feeler lever 2a to overcome the pressure of spring 3a and rotates, dynamic and static contact separates, and plays the effect of fault current limiting.Yet, dynamic and static contact is in case separate, electrodynamic repulsion force reduces thereupon, and the operating mechanism of this moment does not also have enough time to move, and movable feeler lever 2a falls after rise under the effect of spring 3a again, 1a is close to the stationary contact bar, near when the certain distance, will produce electric arc between the dynamic and static contact, not only influence current limitation effect, also can cause the serious scaling loss of contact even melting welding takes place, make fault current damage load elements.
The utility model content
The technical problems to be solved in the utility model provides a kind of contact mechanism of circuit breaker, hinders electric current for some reason and when being scolded out, this mechanism can block movable feeler lever and make it and can not fall after rise, thereby improves the fail safe of contact system greatly at movable feeler lever.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of contact mechanism of circuit breaker, comprise: movable feeler lever, have stationary contact bar, rotating shaft, the touch spring of sweep, wherein movable feeler lever is provided with one section cylinder, this cylinder is coaxial with the center of rotation of movable feeler lever, also is provided with the bayonet socket of one depression on this cylinder; In rotating shaft, be provided with radial hole, a horizontal movable bayonet lock in the radial hole, the top flexible pressing plate of movable bayonet lock, spring bearer plate lock active card and are pressed on the movable feeler lever cylinder.
Because of movable bayonet lock and spring bearer plate are positioned at the radial hole of rotating shaft, movable bayonet lock acts on pressure on the movable feeler lever cylinder just in time by the center of rotation of centrepin, and therefore the pressure of movable bayonet lock does not produce torque on movable feeler lever.When dynamic and static contact closure, the active force of spring produces anticlockwise torque on movable feeler lever, and this anticlockwise torque has guaranteed the closed end pressure between the dynamic and static contact.When big fault current occurring in the circuit, electrodynamic repulsion force is scolded out movable feeler lever, movable feeler lever clockwise rotates in rotating shaft, between the cylinder of movable bayonet lock and movable feeler lever slide relative takes place, when movable bayonet lock slides into cylinder bayonet socket position, can block movable feeler lever, movable feeler lever can't be fallen after rise under the effect of spring, keep the released state of dynamic and static contact, avoid forming again current path, perhaps form the electrical arc erosion contact once more, reach the effect of restriction, disjunction fault current.
Preferably, the two ends of described spring bearer plate are fixed in the rotating shaft, and the middle part is bent downwardly.
Preferably, described rotating shaft is one the cylinder of end face to be arranged, and movable feeler lever is inserted in this cylinder along diametric(al), and the centrepin two ends of movable feeler lever all are bearing on two end faces of cylinder.
Preferably, the sweep of described stationary contact bar is V-shaped, and the stationary contact bar of this shape makes the easier arc extinguishing grid pieces that enters of electric arc.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation of a kind of breaker contact system of the prior art.
Fig. 2 is the schematic diagram of contact of breaker of the present utility model mechanism.
Fig. 3 is the STRUCTURE DECOMPOSITION figure of mechanism shown in Figure 2.
Fig. 4 is the shape schematic diagram of movable feeler lever.
Fig. 5 is the schematic diagram of contact mechanism of the present utility model when blocking state.
Embodiment
As Fig. 2, Fig. 3, shown in Figure 4, the clamping mechanism of the utility model breaker contact system, comprise movable feeler lever 2 and rotating shaft 6, movable feeler lever 2 is installed in the rotating shaft 6 by centrepin 7 and can rotates around centrepin 7, thereby the moving contact 21 of movable feeler lever 2 ends can or be separated with fixed contact 11 contacts of stationary contact bar 1 end of bending; Rotating shaft 6 simultaneously also is connected with the operating mechanism of circuit breaker, and can rotate under the drive of operating mechanism, rotates together thereby drive movable feeler lever 2, realizes the separating brake feed motion.Touch spring 3 is pressed on the movable feeler lever 2, keeps the closed end pressure between the dynamic and static contact.Described movable feeler lever 2 is provided with one section cylinder 23, and this cylinder 23 is coaxial with the center of rotation of movable feeler lever 2, also is provided with the bayonet socket 22 of one depression on this cylinder 23; Position relative with movable feeler lever cylinder 23 in the described rotating shaft 6 is provided with radial hole 61, horizontal movable bayonet locks 5 in the radial hole 61, and the top flexible pressing plate 4 of movable bayonet lock 5, spring bearer plate 4 are pressed on the movable feeler lever cylinder 23 movable bayonet lock 5.Spring bearer plate 4 is the reclinate steel plates in a slice middle part, and the two ends of steel plate are fixed in the rotating shaft 6.Rotating shaft 6 is similar cylindrical structure, and movable feeler lever 2 passes cylinder along diametric(al), and 7 of centrepins are inserted in the cylinder vertically and are bearing in the two ends of cylinder.
In order more to be expressly understood action principle of the present utility model and beneficial effect, mechanism of the present utility model is described below.
As shown in Figure 2, be positioned at the radial hole 61 of rotating shaft 6 because of movable bayonet lock 5 and spring bearer plate 4, movable bayonet lock 5 contacts with 23 one-tenth lines of movable feeler lever cylinder, movable bayonet lock 5 acts on pressure on the movable feeler lever cylinder 23 just in time by the center of rotation of centrepin 7, and therefore the pressure of movable bayonet lock 5 does not produce torque on movable feeler lever 2.The active force of touch spring 3 produces anticlockwise torque on movable feeler lever 2, this anticlockwise torque has guaranteed the closed end pressure between the dynamic and static contact.
When electric current passes through, because stationary contact bar 1 is designed to bending, and its end and movable feeler lever 2 almost parallels, the sense of current of stationary contact bar 1 end and the current opposite in direction in the movable feeler lever 2 will form electrodynamic repulsion force like this between dynamic and static feeler lever.When big fault current occurring in the circuit, electrodynamic repulsion force overcomes the effect of touch spring 3 movable feeler lever 2 is scolded out, movable feeler lever 2 clockwise rotates in rotating shaft 6, between the cylinder 23 of movable bayonet lock 5 and movable feeler lever slide relative takes place, along with the increase of movable feeler lever 2 rotational angles, when movable bayonet lock 5 slides into bayonet socket 22 positions, can block movable feeler lever 2, movable feeler lever 2 can't be fallen after rise under the effect of spring, keep the released state of dynamic and static contact, as shown in Figure 5.
Subsequently, operating mechanism trips under the triggering of release, rotating shaft 6 drives movable feeler lever 2 and continues to clockwise rotate, movable feeler lever 2 can run into obstacle in rotating process, under the restriction of obstacle, movable feeler lever 2 rotates counterclockwise with respect to rotating shaft 6, and movable bayonet lock 5 is deviate from from bayonet socket 22, movable feeler lever 2 resets in rotating shaft 6, and dynamic and static contact can be closed when so just having guaranteed the operating mechanism combined floodgate.
Claims (4)
1. the contact mechanism of a circuit breaker, comprising: movable feeler lever (2), the stationary contact bar (1) that has sweep, rotating shaft (6), touch spring (3) is characterized in that:
Described movable feeler lever (2) is provided with one section cylinder (23), and this cylinder (23) is coaxial with the center of rotation of movable feeler lever (2), also is provided with the bayonet socket (22) of one depression on this cylinder (23);
Described rotating shaft (6) is provided with radial hole (61), a horizontal movable bayonet lock (5) in the radial hole (61), and the top flexible pressing plate (4) of movable bayonet lock (5), spring bearer plate (4) are pressed on the movable feeler lever cylinder (23) movable bayonet lock (5).
2. contact mechanism according to claim 1 is characterized in that: the two ends of described spring bearer plate (4) are fixed in the rotating shaft (6), and the middle part is bent downwardly.
3. contact mechanism according to claim 1 is characterized in that: described rotating shaft (6) is one the cylinder of end face to be arranged, and movable feeler lever (2) is inserted in this cylinder along diametric(al), and centrepin (7) two ends of movable feeler lever (2) all are bearing on two end faces of cylinder.
4. contact mechanism according to claim 1 is characterized in that: the sweep of described stationary contact bar (1) is V-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040893 CN2785127Y (en) | 2005-04-15 | 2005-04-15 | Contact structure of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040893 CN2785127Y (en) | 2005-04-15 | 2005-04-15 | Contact structure of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2785127Y true CN2785127Y (en) | 2006-05-31 |
Family
ID=36772092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040893 Expired - Lifetime CN2785127Y (en) | 2005-04-15 | 2005-04-15 | Contact structure of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2785127Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418174C (en) * | 2005-04-15 | 2008-09-10 | 德力西电气有限公司 | Circuit breaker contact mechanism |
| CN101211718B (en) * | 2006-12-29 | 2011-04-06 | Ls产电株式会社 | Apparatus for connecting breaker chain pin |
-
2005
- 2005-04-15 CN CN 200520040893 patent/CN2785127Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418174C (en) * | 2005-04-15 | 2008-09-10 | 德力西电气有限公司 | Circuit breaker contact mechanism |
| CN101211718B (en) * | 2006-12-29 | 2011-04-06 | Ls产电株式会社 | Apparatus for connecting breaker chain pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DELIXI ELECTRIC LTD. Free format text: FORMER OWNER: DELIXI ELECTRIC APPLIANCES CO., LTD., ZHEJIANG PROV. Effective date: 20080118 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080118 Address after: Liushi Delixi high tech Industrial Park, Wenzhou City, Zhejiang province zip code: 325604 Patentee after: Delixi Electric Co., Ltd. Address before: Yueqing City, Zhejiang province Liushi Delixi Industrial Park, zip code: 325604 Patentee before: Delixi Electrical Appliance Co., Ltd., Zhejiang |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080910 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |