CN101826426B - Contact locking device of single-breakpoint molded-case low-voltage circuit breaker - Google Patents
Contact locking device of single-breakpoint molded-case low-voltage circuit breaker Download PDFInfo
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- CN101826426B CN101826426B CN2010101508198A CN201010150819A CN101826426B CN 101826426 B CN101826426 B CN 101826426B CN 2010101508198 A CN2010101508198 A CN 2010101508198A CN 201010150819 A CN201010150819 A CN 201010150819A CN 101826426 B CN101826426 B CN 101826426B
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- moving contact
- rotating shaft
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Abstract
The invention discloses a contact locking device of a single-breakpoint molded-case low-voltage circuit breaker, which comprises a movable moving contact and a rotating shaft, wherein the rotating shaft is provided with a cavity; the rotating end of the moving contact is arranged in the cavity; a mandrel runs through a hole on the moving contact; the two ends of the mandrel are connected with the rotating shaft; a shaft is transversely positioned in front of the outer outline surfaces of two sidewalls of the rotating shaft; a groove at the top rotating end of the moving contact is clamped on the shaft; another shaft is arranged at the top ends of the two sidewalls of the rotating shaft, and is connected with the upper ends of tension springs of which lower ends are connected with the first shaft; and each of the outer outline surfaces has a highest point at a longest distance away from the mandrel, and when the moving contact is repulsed by a longest distance, the first shaft passes by the highest point. As the moving contact is reliably locked under the action of the tension springs after passing by the position of the highest point which is a dead point, the contact locking device of the single-breakpoint molded-case low-voltage circuit breaker has the characteristics of simple structure, convenient operation and reliable movement, and can effectively prevent the moving contact from falling off and avoid an arc of the moving contact being re-ignited.
Description
Technical field
The present invention relates to limit the case low-voltage circuit breaker of moulding of current switching, relate in particular to the contact locking device of low-voltage circuit breaker.
Background technology
In moulding the case low-voltage circuit breaker course of work, when bigger failed shorted electric current occurring in the circuit, before the operating mechanism action, moving contact overcomes contact pressure and scolds out in advance under the effect of electrodynamic repulsion force, and the rotating shaft transfixion.The effect of contact locking device is: dynamic and static contact scold reach large opening after, make moving contact rest on maximum position, under the effect of operating mechanism, thread off at release, fall to avoid moving contact failover short circuit current to reduce and cause arc reignition.Existing contact locking device is: the one, adopt bar linkage structure, and when link motion during, just control moving contact and do not fall, but its defective is through the dead point; Complex structure, assembling is inconvenient; The 2nd, utilize the profile of moving contact, when moving contact turned over certain angle, the special shape that is provided with on the moving contact profile just blocks moving contact did not fall it, but its defective is: the special shape on the moving contact is easy to wear, can not positive lock.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to assembly, locking is reliable and can significantly improve the single-break contact locking device of low-voltage circuit breaker current limiting capacity.
The technical scheme that the present invention adopts is: comprise moving contact and rotating shaft, rotating shaft has a cavity, and the moving contact round end is arranged in the cavity; Axle is passed the hole on the moving contact, and its two ends connect rotating shaft, and axle laterally is positioned at the place ahead of the outer surface of rotating shaft two side; The groove of moving contact rotating tip is stuck on the axle; The top of rotating shaft two side is provided with another axle, and the upper end of extension spring connects another axle, lower end connecting axle; Outer surface has a peak apart from axle, and moving contact is scolded when reaching maximum position, and beam warp is crossed this peak.
The invention has the beneficial effects as follows: through behind peak this dead-centre position, the effect through extension spring makes the moving contact positive lock at moving contact, and simple in structure, easy to operate, reliable in action can effectively prevent falling of moving contact, has avoided the arc reignition of moving contact.
Description of drawings
Fig. 1 is a decomposition texture sketch map of the present invention.
Fig. 2 is that structure of the present invention is partly cutd open sketch map.
Fig. 3 is the structural representation of moving contact 7 of the present invention when scolding out.
Among the figure: 2. spool; 3. axle; 4. rotating shaft; 5. extension spring; The axle; 7. moving contact; 9. groove; 41. groove; 42. outer surface; 71. groove; 72. hole.
Embodiment
Show like Fig. 1: the present invention is made up of axle 2, axle 3, rotating shaft 4, extension spring 5, another axle 6 and moving contact 7.Establish a hole 72 at the round end of moving contact 7, establish a groove 71 at rotating tip, rotating shaft 4 is a structure that has cavity; The round end of moving contact 7 is installed in the cavity of rotating shaft 4, and the free end of moving contact 7 is positioned at outside the cavity of rotating shaft 4, and axle 3 is passed the hole 72 on the moving contact 7; Its two ends are connected in the rotating shaft 4, specifically are to be assemblied in the groove of rotating shaft 4 cavity two sides, and moving contact 7 and rotating shaft 4 are linked together; And moving contact 7 can rotate for center of rotation around axle 3 in rotating shaft 4.Axle 2 laterally is positioned at the place ahead of the outer surface 42 of rotating shaft 4 two sides, and passes the groove 71 on the moving contact 7.
Respectively establish a symmetrical groove 41 in the top of rotating shaft 4 two sides, axle 6 is assemblied in the groove 41.Two extension springs 5 are installed in the cavity of rotating shaft 4; Extension spring 5 symmetry between rotating shaft 4 madial walls and moving contact 7 round ends is installed, and the upper end of extension spring 5 is connected on the axle 6, and the lower end is connected on the axle 2; This structure makes the groove 71 on the moving contact 7 block axle 2, and the initial pressure of moving contact 7 is provided.When moving contact 7 when axle 3 is rotated for center of rotation, under the effect of extension spring 5, axle 2 produces motion, axle 2 touches outer surface 42 earlier after outer surface 42 the place aheads motion of rotating shaft 4 two sides, then just along outer surface 42 to lower slider.With respect to the distance of axle 3, on outer surface 42, have a peak, groove 9 just is arranged on the bottom surface of rotating shaft 4 two sides and is positioned at the rear portion of this peak, and axle 2 falls into groove 9 after lower slider.
Assembling process of the present invention is: at first axle 3 is passed the hole 72 on the moving contact 7; It is filled in the rotating shaft 4 together, and the state of rotating shaft 4 is that the two ends of axle 3 are assemblied in the groove of rotating shaft 4 two sides, and axle 6 is contained in the groove 41 above the rotating shaft 4; End with extension spring 5 hangs on the axle 6 then; Axle 2 is packed in the groove 71 of moving contact 7 again, the other end of extension spring 5 is hung on the axle 2, extension spring at this moment 5 provides one with respect to center of rotation axle 3 clockwise moments of torsion for moving contact 7 through axle 2; This moment, axle 2 was discontiguous with the outer surface 42 of rotating shaft 4 two sides, and moving contact 7 contacts with outer surface 42 in the process of scolding out.
Operation principle of the present invention is following: when moving contact 7 and fixed contact under closure state, axle 2 is positioned at the peak in the place ahead, side of rotating shaft 4 two sides, when short circuit current is scolded out through making moving contact 7; Moving contact 7 is rotated counterclockwise around axle 3, drives axle 2 simultaneously and rotates, and under the effect of the pulling force of extension spring 5 and groove 71, axle 2 is slided along the outer surfaces 42 of rotating shaft 4 two sides; After axle 2 slides past the peak on the outer surface 42 downwards, just fall into groove 9, at this moment; Moving contact 7 is scolded and is reached maximum position, and extension spring 5 is discharged in the rotating shaft 4, at this moment through the power of 2 pairs of moving contacts 7 of axle; Axle 2 provides moment of torsion for moving contact 7; Axle 2 makes moving contact 7 rest on this position, so can't fall after rise after moving contact 7 arrives the peak of scolding open position, under the effect of operating mechanism at release, has external force that moving contact 7 is resetted; Get back to initial position after making axle 2 cross groove 9, prevented arc reignition.When threading off under the effect of operating mechanism at release, drive rotating shaft 4 and rotate, because moving contact 7 stops down that at arc control device etc. make the axle 2 outer surface 42 former roads along rotating shaft 4 turn back to initial position, switch is to the trip free state.
Claims (3)
1. the contact locking device of a single-breakpoint molded-case low-voltage circuit breaker; Comprise moving contact (7) and rotating shaft (4), it is characterized in that: rotating shaft (4) has a cavity, and the round end of moving contact (7) is arranged in the cavity; Hole (72) and two ends that axle (3) is passed on the moving contact (7) connect rotating shaft (4); First (2) laterally are positioned at the place ahead of the outer surface (42) of rotating shaft (4) two side, and first (2) are stuck in the groove (71) of moving contact (7) rotating tip, and the top of rotating shaft (4) two side is provided with second (6); The upper end of extension spring (5) connects second (6), and the lower end connects first (2); Outer surface (42) has a peak apart from axle (3); On the bottom surface of rotating shaft (4) two side and the rear portion that is positioned at said peak groove (9) is set; Moving contact (7) is scolded when reaching maximum position; After first (2) slide past the peak on the outer surface (42) downwards, just fall into groove (9).
2. the contact locking device of a kind of single-breakpoint molded-case low-voltage circuit breaker according to claim 1, it is characterized in that: said extension spring (5) is symmetricly set between rotating shaft (4) madial wall and moving contact (7) round end.
3. the contact locking device of a kind of single-breakpoint molded-case low-voltage circuit breaker according to claim 1; It is characterized in that: a groove (41) is respectively established in the top of rotating shaft (4) two side; Two grooves (41) left-right symmetric, second (6) are arranged in two grooves (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101508198A CN101826426B (en) | 2010-04-16 | 2010-04-16 | Contact locking device of single-breakpoint molded-case low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101508198A CN101826426B (en) | 2010-04-16 | 2010-04-16 | Contact locking device of single-breakpoint molded-case low-voltage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101826426A CN101826426A (en) | 2010-09-08 |
| CN101826426B true CN101826426B (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101508198A Active CN101826426B (en) | 2010-04-16 | 2010-04-16 | Contact locking device of single-breakpoint molded-case low-voltage circuit breaker |
Country Status (1)
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| CN (1) | CN101826426B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243949A (en) * | 2011-05-03 | 2011-11-16 | 江苏辉能电气有限公司 | Rotary shaft structure of plastic shell circuit breaker |
| CN104576247A (en) * | 2015-01-05 | 2015-04-29 | 无锡新宏泰电器科技股份有限公司 | Falling-prevention single-break contact operation mechanism |
| CN104733265B (en) * | 2015-03-23 | 2017-10-31 | 厦门宏发开关设备有限公司 | A kind of moving contact reprimand of breaker opens rear self-locking structure |
| 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 |
| CN108735557B (en) * | 2018-08-07 | 2024-03-22 | 江苏凯隆电器有限公司 | Repulsion unlocking device of breaker moving contact and working method thereof |
| CN110211849A (en) * | 2019-04-03 | 2019-09-06 | 德力西电气有限公司 | The dropproof movable contact spring of disjunction for breaker of plastic casing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826674Y (en) * | 2005-08-07 | 2006-10-11 | Tcl国际电工(无锡)有限公司 | Movable contact of moulded casing circuit breaker |
| CN101533744A (en) * | 2008-09-26 | 2009-09-16 | 厦门宏美电子有限公司 | Falling-preventing structure after moving contact of current-limiting circuit breaker with a plastic shell is opened |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4466209B2 (en) * | 2004-06-10 | 2010-05-26 | 富士電機機器制御株式会社 | Circuit breaker |
-
2010
- 2010-04-16 CN CN2010101508198A patent/CN101826426B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826674Y (en) * | 2005-08-07 | 2006-10-11 | Tcl国际电工(无锡)有限公司 | Movable contact of moulded casing circuit breaker |
| CN101533744A (en) * | 2008-09-26 | 2009-09-16 | 厦门宏美电子有限公司 | Falling-preventing structure after moving contact of current-limiting circuit breaker with a plastic shell is opened |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-353404A 2005.12.22 |
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| Publication number | Publication date |
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| CN101826426A (en) | 2010-09-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Effective date of registration: 20220526 Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. Address before: 212132 mechanical and Electrical Industrial Park, Dagang East Road, Dagang District, Zhenjiang, Jiangsu A5 Patentee before: Jiangsu Phono Electric Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Eaton Huineng low voltage electrical appliances (Jiangsu) Co.,Ltd. Address before: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |