CN102184812B - Movable static contact structure for plastic-shell circuit breaker - Google Patents
Movable static contact structure for plastic-shell circuit breaker Download PDFInfo
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- CN102184812B CN102184812B CN 201110111481 CN201110111481A CN102184812B CN 102184812 B CN102184812 B CN 102184812B CN 201110111481 CN201110111481 CN 201110111481 CN 201110111481 A CN201110111481 A CN 201110111481A CN 102184812 B CN102184812 B CN 102184812B
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Abstract
The invention discloses a movable static contact structure for a plastic-shell circuit breaker. The back parts of a static contact plastic piece and a static contact are connected with a plastic bracket through a static contact rotating shaft; the plastic bracket is fixedly connected with a connecting bar; a spring is arranged between the back part of the static contact and the plastic bracket; a copper braided wire is connected between the connecting bar and the static contact; the back part of the static contact plastic piece is provided with two fan-shaped bosses which have fan-shaped sections and are bilaterally symmetric to the static contact; first through holes formed in the middles of the two fan-shaped bosses are coaxial with a third through hole formed on the back part of the static contact; the static contact rotating shaft passes through the first through holes and the third through hole, and the two ends of the static contact rotating shaft are connected with the plastic bracket; a first cavity is formed at the middle position of the plastic bracket; the back part of the plastic bracket is provided with a second cavity; the copper braided wire is arranged in the first cavity; and the spring and the back parts of the static contact plastic piece and the static contact are accommodated in the second cavity. In the breaking process of a circuit breaker, electric arcs are prevented from burning the contact and metal particles produced by an arc chute are prevented from sputtering towards the back part of the static contact, so that the static contact structure is more reliable.
Description
Technical field
The present invention relates to breaker of plastic casing, be specifically related to the movable static contact structure of breaker of plastic casing, belong to the low-voltage electrical technical field.
Background technology
In breaker of plastic casing, fixed contact is the critical component of circuit breaker inside, and the static contact structure in the existing breaker of plastic casing divides fixedly two kinds of fixed contacts and movable fixed contact.Wherein, use the breaker of plastic casing of fixing fixed contact when disjunction, only rely on moving contact to scold out, moving contact is slower with the speed that fixed contact separates, and electric arc can not extinguish soon, causes the switch breaking capacity not high, and circuit breaker has the danger of scaling loss.Movable static contact structure can increase clearance between open contacts, makes longer that electric arc draws, and guarantees reliably extinguish arcs.Movable fixed contact is generally supported by working of plastics; working of plastics is a very important support and guard block to whole movable static contact structure; present ubiquitous problem is that the fixed contact working of plastics is not in place to the rear portion protection of fixed contact; the metallic that causes electrical arc erosion contact and arc extinguishing grid pieces to produce is sprayed onto the rear portion of fixed contact; in case metallic adheres to provide on the spring of reset force or with fixed contact and fixed contact rotating shaft to fixed contact and adheres to each other, and just has influence on the performance of whole circuit breaker.Movable fixed contact is connected row's the dual mode that is connected with the end of incoming cables, a kind of is to pass through holder, a kind of is to pass through copper litz wire, when adopting holder, when the dynamic/static contact disjunction, electric arc arc root can rest on the fixed contact position so, makes the temperature of fixed contact very high, the place of clamping can deform and melting welding, thereby affects the performance of whole circuit breaker; When adopting copper litz wire, be by welding manner movable fixed contact to be connected with the end of incoming cables to arrange to link together, present all is that copper litz wire is exposed outside at support, and copper litz wire can not well be insulated, and affects the performance of circuit breaker.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, the movable static contact structure that is used for breaker of plastic casing that a kind of easy for installation, operating characteristics is stable and protective value is good is provided.
The technical solution used in the present invention is: have fixed contact and fixed contact rotating shaft, fixed contact is wrapped with the fixed contact working of plastics, the fixed contact working of plastics is connected the rear portion by fixed contact rotating shaft connection plastic stent with fixed contact, the affixed connection row of plastic stent, be provided with spring between the rear portion of fixed contact and the plastic stent, connect between row and the fixed contact and connect copper litz wire; The rear portion of described fixed contact working of plastics be the cross section be fan-shaped two left-right symmetric in the fan-shaped boss of fixed contact, the first through hole that the centre of two fan-shaped boss is provided with is coaxial with the third through-hole that the rear portion of fixed contact is provided with; The fixed contact rotating shaft passes first, third through-hole and its two ends connect plastic stent; The middle part of plastic stent is provided with the first cavity volume, and the rear portion is provided with the second cavity volume; Be copper litz wire in the first cavity volume, accommodate rear portion and the spring of fixed contact working of plastics and fixed contact in the second cavity volume.
The invention has the beneficial effects as follows:
1, the symmetrical fan-shaped boss of fixed contact working of plastics can prevent metallic that electrical arc erosion contact and arc extinguishing grid pieces produce to the rear portion splash of fixed contact in whole circuit breaker breaking course, finally makes the circuit breaker can't normal deciliter thereby the spring that prevents from providing reset force to fixed contact is adhered to, affects resetting of fixed contact by metallic.
2, the symmetrical fan-shaped boss of fixed contact working of plastics can prevent that fixed contact rotating shaft and fixed contact from being adhered to each other, making fixed contact not rotate by metal ion and affect the performance of circuit breaker.
3, the matched in clearance of the left-right symmetric face of the symmetrical fan-shaped boss of fixed contact working of plastics and plastic stent cavity volume, when circuit breaker cut-offs, the fixed contact working of plastics is along with fixed contact moves together, fan-shaped boss can guarantee metallic can not be sprayed onto the fixed contact rear portion and make fixed contact can double swerve, can not make owing to the left-right symmetric face friction of the cavity volume of fan-shaped boss and plastic stent fixed contact can't regular event affect the performance of circuit breaker.
4, adopt stage clip, torsion spring or extension spring to provide fixed contact to scold out rear required reset force, the part of static contact structure is reduced, assembling is simple, and convenient operation and stage clip processing are simple, and machining accuracy is high.
5, copper litz wire is placed in the cavity volume of plastic stent, the Insulation Problems of static contact structure compactness and copper litz wire is well solved, compares with adopting clamp structure, distortion can not appear in copper litz wire, the problems such as melting welding make whole static contact structure more reliable.
Description of drawings
Below by by reference to the accompanying drawings with the explanation to preferred but not exclusive embodiment shown in the infinite example, can know and understand further characteristic of the present invention and advantage.
Fig. 1 is that the present invention is at the structure cutaway view of fixed contact 2 initial positions;
Fig. 2 is the present invention scolds open position at fixed contact 2 structure cutaway view;
Fig. 3 is the amplification assumption diagram of fixed contact working of plastics 1 among Fig. 1;
Fig. 4 is fixed contact 2 structure charts among Fig. 1;
Fig. 5 is the assembly structure figure of fixed contact 2 and fixed contact working of plastics 1 among Fig. 1;
Fig. 6 is the cutaway view of plastic stent 3 among Fig. 1;
Among the figure: 1. fixed contact working of plastics; 2. fixed contact; 3. plastic stent; 4. connect row; 5. copper litz wire; 6. spring (among the figure only take stage clip as example); 7. fixed contact rotating shaft; 11. fan-shaped boss; 14. groove; 21. boss;
12,13,22,31. first, second, third, fourth through holes;
32,33. first, second cavity volumes.
Embodiment
As illustrated in fig. 1 and 2, the present invention is comprised of fixed contact working of plastics 1, fixed contact 2, plastic stent 3, connection row 4, copper litz wire 5, spring 6 and fixed contact rotating shaft 7.Fixed contact working of plastics 1 is wrapped in outside the fixed contact 2, the rear portion of fixed contact working of plastics 1 and fixed contact 2 connects plastic stent 3 by fixed contact rotating shaft 7, connecting row 4 bottoms is fixed on the plastic stent 3, spring 6 is between fixed contact 2 rear portions and plastic stent 3, and copper litz wire 5 is positioned at plastic stent 3 and connects row 4 and fixed contact 2.
As shown in Figure 3, the front portion of fixed contact working of plastics 1 has groove 14, and the middle part has the second through hole 13, and the rear portion is that the cross section is that two fan-shaped left-right symmetric have the first through hole 12 in the centre of 11, two fan-shaped boss 11 of fan-shaped boss of fixed contact 2.As shown in Figure 4, the middle part of fixed contact 2 is provided with boss 21, and the rear portion is provided with third through-hole 22.As shown in Figure 5, fixed contact working of plastics 1 is enclosed within on the fixed contact 2 by groove 14 from bottom to top, the front portion of fixed contact 2 is positioned at 14 of the grooves of fixed contact working of plastics 1, boss 21 matches with the second through hole 13 of fixed contact working of plastics 1, the second through hole 13 is enclosed within on the boss 21, guarantees that fixed contact working of plastics 1 reliably contacts with fixed contact 2.The first through hole 12 coaxial installations of the third through-hole 22 of fixed contact 2 and fixed contact working of plastics 1.
As shown in Figure 6, there is the first cavity volume 32 at middle position on the plastic stent 3, and the rear portion is provided with the second cavity volume 33.Respectively be provided with fourth hole 31 on the left-right symmetric face of the second cavity volume 33, fourth hole 31 is coaxial with the first through hole 13 and third through-hole 22.
Shown in Fig. 1-6, copper litz wire is placed in the first cavity volume 32 of plastic stent 3, and an end of copper litz wire 4 welds with being connected row 4 bottoms, and the other end is welded in the bottom of fixed contact 2.Fixed contact working of plastics 1 and fixed contact 2 are stretched in the second cavity volume 33 of plastic stent 3, the rear portion and the spring 6 that have held fixed contact working of plastics 1 and fixed contact 2 in the second cavity volume 33, between the madial wall of fixed contact 2 and the first cavity volume 32, be connected spring 6, spring 6 can adopt stage clip, torsion spring or extension spring, one end of spring 6 connects fixed contact 2 rear portions, and the other end of spring 6 is connected on the madial wall of the second cavity volume 33.Fixed contact rotating shaft 7 passes the first through hole 13 on fourth hole 31 on the plastic stent 3 and the fixed contact working of plastics 1, the two ends of fixed contact rotating shaft 7 are connected on the plastic stent 3, make the mutual matched in clearance of respective face of symmetrical fan-shaped boss 11 and second cavity volume 33 of fixed contact working of plastics 1, make total compacter.
As shown in Figure 1, 2, when fixed contact 2 turned to Fig. 2 and scolds open position from Fig. 1 initial position, fixed contact working of plastics 1 and then fixed contact 2 rotated in the second cavity volume 33 of plastic stent 3 together.After dynamic/static contact was scolded out generation electric arc, meeting scaling loss contact and arc extinguishing grid pieces produced metallic, and these metallics can to the rear portion splash of fixed contact 2, affect the performance of circuit breaker.For head it off, be symmetrical set fan-shaped boss 11 at fixed contact working of plastics 1 rear portion, fixed contact 2 rear portions can there be the space shutoff of shutoff, prevent that the metallic of electrical arc erosion contact and arc extinguishing grid pieces generation is to the rear portion splash of fixed contact, thereby prevent from providing the spring 6 of reset force to be adhered to by metallic to fixed contact 2, affect resetting of fixed contact 2, finally make the circuit breaker can't normal deciliter, because fan-shaped boss 11 can block exposed fixed contact rotating shaft 7, can prevent that also fixed contact rotating shaft 7 and fixed contact 2 from being adhered to each other by the metallic that electrical arc erosion contact and arc extinguishing grid pieces produce, fixed contact 2 can not be rotated and affect the performance of circuit breaker.Because the left-right symmetric face of fan-shaped boss 11 and the second cavity volume 33 cooperatively interacts, certain gap is arranged between the two, so do not have friction between the two, can double swerve and can can't regular event not affect the performance of circuit breaker owing to friction makes fixed contact 2 thereby guarantee in fixed contact 2 motion processes not.The plastic stent 3 of being made by the compression moulding mode adopts plastic materials, the hole that makes fixed contact rotating shaft 7 add man-hour concentricity and precision all be improved, can guarantee that like this fixed contact 2 can double swerve in motion process.And plastics can well insulate, and the support that has reduced traditional iron also needs to do in addition the not high problem of the concentricity in hole of insulation part, complex structure and fixed contact rotating shaft 7 and precision.
Claims (3)
1. movable static contact structure that is used for breaker of plastic casing, have fixed contact (2) and fixed contact rotating shaft (7), it is characterized in that: fixed contact (2) is wrapped with fixed contact working of plastics (1), fixed contact working of plastics (1) is connected 2 with fixed contact) the rear portion connect plastic stent (3) by fixed contact rotating shaft (7), the affixed connection row of plastic stent (3) (4), be provided with spring (6) between the rear portion of fixed contact (2) and the plastic stent (3), connect between row (4) and the fixed contact (2) and connect copper litz wire (5); The rear portion of described fixed contact working of plastics (1) be two radial sections at fixed contact rotating shaft (7) be fan-shaped and left-right symmetric in the fan-shaped boss (11) of fixed contact (2), the first through hole (12) that the centre of two fan-shaped boss (11) is provided with is coaxial with the third through-hole (22) that the rear portion of fixed contact (2) is provided with; Fixed contact rotating shaft (7) passes first, third through-hole (11,22) and its two ends connect plastic stent (3); The middle part of plastic stent (3) is provided with the first cavity volume (32), and the rear portion is provided with the second cavity volume (33); Be copper litz wire (5) in the first cavity volume (32), accommodate rear portion and the spring (6) of fixed contact working of plastics (1) and fixed contact (2) in the second cavity volume (33).
2. a kind of movable static contact structure for breaker of plastic casing according to claim 1 is characterized in that: the mutual matched in clearance of respective face of fan-shaped boss (11) and the second cavity volume (33).
3. a kind of movable static contact structure for breaker of plastic casing according to claim 1, it is characterized in that: spring (6) is stage clip, torsion spring or extension spring, and an end of spring (6) connects fixed contact (2) rear portion, the other end connects on the second cavity volume (33) madial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110111481 CN102184812B (en) | 2011-05-03 | 2011-05-03 | Movable static contact structure for plastic-shell circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110111481 CN102184812B (en) | 2011-05-03 | 2011-05-03 | Movable static contact structure for plastic-shell circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN102184812A CN102184812A (en) | 2011-09-14 |
| CN102184812B true CN102184812B (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110111481 Active CN102184812B (en) | 2011-05-03 | 2011-05-03 | Movable static contact structure for plastic-shell circuit breaker |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386034B (en) * | 2011-10-20 | 2014-01-01 | 德力西电气有限公司 | Static contact system of breaker |
| CN102427009A (en) * | 2011-11-10 | 2012-04-25 | 江苏辉能电气有限公司 | Arc blowing device for low-voltage circuit breaker |
| CN102543593B (en) * | 2012-03-08 | 2014-06-04 | 江苏辉能电气有限公司 | Method for mounting rotating shaft of molded case circuit breaker |
| CN102592907B (en) * | 2012-03-08 | 2014-04-16 | 江苏辉能电气有限公司 | Fixed contact structure of plastic-shell circuit breaker packed with plastic parts |
| CN102568964B (en) * | 2012-03-08 | 2014-03-19 | 江苏辉能电气有限公司 | Protection assembly of movable static contact of plastic shell breaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006294511A (en) * | 2005-04-13 | 2006-10-26 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker |
| CN201066667Y (en) * | 2007-05-29 | 2008-05-28 | 浙江正泰电器股份有限公司 | A contactor system for plastic breaker |
| CN101567281B (en) * | 2009-05-27 | 2011-01-19 | 上海永继电气有限公司 | Single breakpoint contact system of breaker |
| CN101763998B (en) * | 2009-10-23 | 2012-05-02 | 江苏辉能电气有限公司 | Integrated contact arc extinguishing system with movable fixed contact |
| CN101882547B (en) * | 2010-07-08 | 2012-06-13 | 江苏辉能电气有限公司 | Static contact structure of low-voltage circuit breaker |
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2011
- 2011-05-03 CN CN 201110111481 patent/CN102184812B/en active Active
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| CN102184812A (en) | 2011-09-14 |
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Effective date of registration: 20220524 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 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Jiangsu Phono Electric Co.,Ltd. |
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| 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. |