CN102446668A - Contact system for single-breakpoint moulded case circuit breaker - Google Patents
Contact system for single-breakpoint moulded case circuit breaker Download PDFInfo
- Publication number
- CN102446668A CN102446668A CN2010105049139A CN201010504913A CN102446668A CN 102446668 A CN102446668 A CN 102446668A CN 2010105049139 A CN2010105049139 A CN 2010105049139A CN 201010504913 A CN201010504913 A CN 201010504913A CN 102446668 A CN102446668 A CN 102446668A
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- rotating shaft
- pivot pin
- contact
- moving contact
- circuit breaker
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Abstract
The invention discloses a contact system for a single-breakpoint moulded case circuit breaker, wherein the contact system comprises a movable contact and a static contact, and the static contact is internally provided with a concave arc-shaped step; the movable contact is inserted into a sectional slot and is fixed in the center of a rotating shaft; a convex arc-shaped sliding surface is arranged at the upper side of the movable contact; and the convex arc-shaped sliding surface corresponds to the concave arc-shaped step in the sectional slot. By adopting the contact system, when a short circuit is broken, the movable contact can not generate a falling-back phenomenon, and the energy generated when the movable contact is quickly opened can not impact the case of the circuit breaker.
Description
Technical field
The present invention relates to a kind of electric component, relate in particular to a kind of contact system that is used for single-breakpoint molded case circuit breaker.
Background technology
At present, most of low pressure moulded case circuit breakers (single-break) are owing to structural reason, when short circuit breaking; Moving contact is taken the back apart and is prone to produce the falling phenomenon under the effect of electrodynamic repulsion force; Cause arc reignition, make dynamic/static contact closure and melting welding again what is more, harmfulness is very big.Owing to the effect of electrodynamic repulsion force, moving contact is opened rapidly simultaneously, and energy is bigger, can produce severe impact to the shell of circuit breaker, cause shell to damage.
Summary of the invention
The object of the invention exactly in order to address the above problem, provides a kind of contact system that is used for single-breakpoint molded case circuit breaker with new structure.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of contact system that is used for single-breakpoint molded case circuit breaker, comprise moving contact, fixed contact and rotating shaft, and moving contact is installed in the rotating shaft, is characterized in:
Also comprise fixedly pivot pin, slip pivot pin and spring;
Described rotating shaft is provided with a type slotted eye that radially connects, and is provided with the arcs of recesses step in the type slotted eye;
Described moving contact inserts in the above-mentioned type slotted eye and is installed in the rotating shaft, and the upside of moving contact is provided with the sliding surface of convex, and the sliding surface of this convex is corresponding with the arcs of recesses step in the type slotted eye;
Described fixedly pivot pin leap type slotted eye and the two ends of rotating shaft are fixedly connected and are positioned at the below of rotating shaft;
The two ends of described slip pivot pin leap type slotted eye and rotating shaft flexibly connect and are positioned at the top of rotating shaft and slide with the convex sliding surface of moving contact upside and link to each other;
Spring is connected fixedly between the pivot pin and slip pivot pin.
Described slip pivot pin is a tubular structure.
The present invention is used for the contact system of single-breakpoint molded case circuit breaker owing to adopted above technical scheme, makes it compared with prior art, has following advantage and characteristics:
1. during short circuit breaking, moving contact can not fall phenomenon after rise;
2. during short circuit breaking, moving contact is opened rapidly and the energy that produces can not produce the shell of circuit breaker and impacts.
Description of drawings
Fig. 1, Fig. 2 be the present invention's contact system of being used for single-breakpoint molded case circuit breaker partly cut open perspective view, wherein, Fig. 1 is a "on" position, Fig. 2 is for scolding out state;
Fig. 3 is the perspective view of the moving contact among the present invention;
Fig. 4 is the whole perspective view of the rotating shaft among the present invention;
Fig. 5 be among the present invention rotating shaft partly cut open perspective view;
Fig. 6 is the perspective view of the slip pivot pin among the present invention.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention is used for the contact system of single-breakpoint molded case circuit breaker, comprises moving contact 1, fixed contact 2, rotating shaft 3, fixedly pivot pin 4, slip pivot pin 5 and spring 6.Moving contact is installed in the rotating shaft, and rotating shaft is carried out functional the connection with circuit breaker operation mechanism.
Cooperation is referring to Fig. 4, Fig. 5, and the rotating shaft 3 among the present invention is provided with a type slotted eye 31 that radially connects, and is provided with arcs of recesses step 32 in the type slotted eye 31.Moving contact 1 inserts in the above-mentioned type slotted eye 31 and is installed in the rotating shaft 3.
Cooperation is referring to Fig. 3, and the upside of the moving contact 1 among the present invention is provided with the sliding surface 11 of convex, and the sliding surface 11 of this convex is corresponding with the arcs of recesses step 32 in the type slotted eye.
Fixedly the pivot pin 4 type slotted eye 31 of crossing over rotating shafts 3 and the two ends of rotating shaft are fixedly connected and are positioned at the below of rotating shaft 3, and the type slotted eye 31 that slip pivot pin 5 is crossed over rotating shafts 3 and the two ends flexible connection of rotating shaft also are positioned at the top of rotating shaft 3 and link to each other with convex sliding surface 11 slips of moving contact upside.
Cooperation is referring to Fig. 6, and the slip pivot pin 5 among the present invention is a tubular structure, is movably connected with moving contact.
But operation principle accompanying drawings of the present invention is following:
Moving contact is installed in the rotating shaft, and rotating shaft is carried out functional the connection with circuit breaker operation mechanism, and the sliding surface of slip pivot pin convex on the moving contact when moving contact rotates slides; Fixedly pivot pin is fixed in the rotating shaft; Fixedly be connected with spring between pivot pin and the slip pivot pin, when breaker closing, under the effect of spring force; Produce downward mechanical force moment, guaranteeing has enough contact pressures between fixed contact and the moving contact.
During short circuit breaking, under the effect of electrodynamic repulsion force, produce a mechanical force moment during moving contact and the fixed contact initial separation; This moment and moving contact direction of rotation; The mechanical force moment that in the end produces between separation period and the rotation direction of moving contact are complementary, and this moment can guarantee that moving contact remains at the position that it arrives, and stop moving contact to fall after rise; Prevent arc reignition, need not to adopt additional locking device.
During short circuit breaking, under the effect of electrodynamic repulsion force, the energy that produces when moving contact separates with fixed contact, major part passes to rotating shaft, avoids shell is produced impact.
Claims (2)
1. a contact system that is used for single-breakpoint molded case circuit breaker comprises moving contact, fixed contact and rotating shaft, and moving contact is installed in the rotating shaft, it is characterized in that:
Also comprise fixedly pivot pin, slip pivot pin and spring;
Described rotating shaft is provided with a type slotted eye that radially connects, and is provided with the arcs of recesses step in the type slotted eye;
Described moving contact inserts in the above-mentioned type slotted eye and is installed in the rotating shaft, and the upside of moving contact is provided with the sliding surface of convex, and the sliding surface of this convex is corresponding with the arcs of recesses step in the type slotted eye;
Described fixedly pivot pin leap type slotted eye and the two ends of rotating shaft are fixedly connected and are positioned at the below of rotating shaft;
The two ends of described slip pivot pin leap type slotted eye and rotating shaft flexibly connect and are positioned at the top of rotating shaft and slide with the convex sliding surface of moving contact upside and link to each other;
Spring is connected fixedly between the pivot pin and slip pivot pin.
2. the contact system that is used for single-breakpoint molded case circuit breaker as claimed in claim 1 is characterized in that: described slip pivot pin is a tubular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105049139A CN102446668A (en) | 2010-10-12 | 2010-10-12 | Contact system for single-breakpoint moulded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105049139A CN102446668A (en) | 2010-10-12 | 2010-10-12 | Contact system for single-breakpoint moulded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102446668A true CN102446668A (en) | 2012-05-09 |
Family
ID=46009077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105049139A Pending CN102446668A (en) | 2010-10-12 | 2010-10-12 | Contact system for single-breakpoint moulded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102446668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426697A (en) * | 2013-07-23 | 2013-12-04 | 浙江天正电气股份有限公司 | Modular multi-pole single-breakpoint molded-case circuit breaker and single-breakpoint contact system thereof |
-
2010
- 2010-10-12 CN CN2010105049139A patent/CN102446668A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426697A (en) * | 2013-07-23 | 2013-12-04 | 浙江天正电气股份有限公司 | Modular multi-pole single-breakpoint molded-case circuit breaker and single-breakpoint contact system thereof |
| CN103426697B (en) * | 2013-07-23 | 2015-06-03 | 浙江天正电气股份有限公司 | Modular multi-pole single-breakpoint molded-case circuit breaker and single-breakpoint contact system thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120509 |