CN202352601U - Contact structure for moulded case circuit breakers and moulded case circuit breaker using contact structure - Google Patents
Contact structure for moulded case circuit breakers and moulded case circuit breaker using contact structure Download PDFInfo
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- CN202352601U CN202352601U CN201120463742XU CN201120463742U CN202352601U CN 202352601 U CN202352601 U CN 202352601U CN 201120463742X U CN201120463742X U CN 201120463742XU CN 201120463742 U CN201120463742 U CN 201120463742U CN 202352601 U CN202352601 U CN 202352601U
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- breaker
- plastic casing
- groove
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Abstract
Disclosed is a contact structure for moulded case circuit breakers. The contact structure comprises moving contact frames, moving contacts, drawing rods and tension springs, wherein the moving contacts are arranged in the moving contact frames, the drawing rods are connected with the moving contacts, the tension springs are used for providing pressure for the moving contacts, one end of each of the drawing rods is provided with a tension spring shaft, the other end of each of the drawing rods is provided with a clamping shaft, sliding grooves are arranged on the moving contact fames, the tension spring shaft is arranged in each of the sliding grooves in a sliding mode, clamping grooves are arranged on the moving contacts, and the clamping shaft is clamped in each of the clamping grooves. The contact structure is simple, when the contact is separated by an electric repulsion force, the contact can be clamped automatically so that the rebound can be prevented, and when the contact is separated for a small angle by the electric repulsion force, a clamping device can clamp the contact to an spacing limit position so that the spring can be protected from being damaged by an electric arc or metal particles, the safety is high, and the contact is safe and reliable in using. A moulded case circuit breaker using the contact structure is further disclosed. The moulded case circuit breaker is simple in structure and safe and reliable in using.
Description
Technical field:
The utility model relates to the structure of contact terminal of circuit breaker, relates in particular to a kind of structure of contact terminal that is used for breaker of plastic casing, and the utility model also relates to a kind of breaker of plastic casing that above-mentioned structure of contact terminal is installed.
Background technology:
At present; The contact module part has received very large attention as the important part of breaker of plastic casing; The present age, novel high breaking breaker of plastic casing basically all adopted the rotating dual-breakpoint moving contact structure; Version is various, is no lack of the rotation probe structure with additional function in the similar products at home and abroad, and its main additional function is the anti-rebound function of the automatic chucking after contact is scolded out by electrodynamic repulsion force.The electrodynamic repulsion force that rotating dual-breakpoint contact system utilizes fault current to produce comes directly to make dynamic and static contact to separate, and can reach the purpose of fast cut-off circuit.Therefore the breaker of plastic casing of double break point form is one of developing direction of current breaker of plastic casing product.
Utility model patent like Chinese patent CN201020239832.6; The day for announcing is on 01 26th, 2011, and disclosed breaker contact system comprises rotating shaft and moving contact; Said rotating shaft has the cavity that is used to hold said moving contact; Said cavity is stretched out at the two ends of said moving contact, and said contact system also comprises two metal profile that are arranged in the said cavity, and two metal profile are oppositely arranged; Said moving contact is between two metal profile, and the upper side edge of said metal profile, the profile of lower side comprise first recess, second recess, the retaining portion between first recess and second recess and the curved face part of evagination; Said moving contact is provided with two mounting holes, and said mounting hole lays respectively at the upper and lower of said moving contact.Though contact receives electrodynamic repulsion force to scold out the back can tighten anti-bounce-back automatically in the technique scheme, but still has following defective: both sides contact pressure balanced capacity is poor, and complex structure, lacks the acceleration contact and scolds opening structure.
The utility model content:
The utility model technical problem to be solved is to overcome the deficiency of above-mentioned prior art; Provide a kind of simple in structure, contact in a single day to receive electrodynamic repulsion force to scold out a smaller angle, gripping mechanism can be stuck in out the structure of contact terminal that is used for breaker of plastic casing apart from extreme position with contact rapidly.
The utility model technical problem to be solved is to overcome the deficiency of above-mentioned prior art, provides a kind of simple in structure, easy to operate, the breaker of plastic casing that security performance is good.
The main technical schemes that the structure of contact terminal that is used for breaker of plastic casing that provides according to the utility model adopts is: comprise action contact frame, be installed in the moving contact in the said action contact frame; Pull bar that is connected with said moving contact and the extension spring that is used to provide said moving contact pressure; One end of said pull bar is provided with tension spring shaft; An other end is provided with axis, has chute on the said action contact frame, and said tension spring shaft slidably is installed in the said chute; Said moving contact is provided with draw-in groove, and said axis card leans against in the said draw-in groove.
The structure of contact terminal that is used for breaker of plastic casing that the utility model provides also adopts following attached technical scheme:
Be provided with the stroke groove in the said action contact frame, said moving contact is arranged in the said stroke groove, and said moving contact middle part is hinged on the said action contact frame, and said moving contact two ends protrusion stroke groove reveals to be put outside.Said action contact frame both sides are provided with the extension spring groove, and said extension spring is positioned at said extension spring groove.
Said extension spring is two, lays respectively at the left and right sides of said action contact frame, and the end of said two extension springs is enclosed within the two ends of said tension spring shaft respectively.
One end of said pull bar is provided with circular hole, and an other end is provided with C shape groove, and said axis is installed in the said circular hole, and said tension spring shaft card leans against in the said C shape groove.
Said draw-in groove is two, and is positioned at the both sides of said moving contact pin joint vertical line.
The both sides of said action contact frame are equipped with cover plate, and the bilateral symmetry of said action contact frame is provided with a plurality of hole clippings, and said cover plate is provided with fixture block, and said cover plate is through said fixture block and the said hole clipping matching and fixing both sides at said action contact frame.
The main technical schemes that the breaker of plastic casing that provides according to the utility model adopts is: comprise housing, be installed in electromagnetic mechanism and structure of contact terminal in the said housing; Said structure of contact terminal comprises action contact frame, is installed in the moving contact in the said action contact frame, pull bar that is connected with said moving contact and the extension spring that is used to locate said moving contact.
The beneficial effect that the structure of contact terminal that is used for breaker of plastic casing that adopts the utility model to provide brings is: the utility model is simple in structure; Contact receives electrodynamic repulsion force to scold out the back, and in a single day chucking prevention rebound function, contact receive electrodynamic repulsion force to scold out a smaller angle automatically; Gripping mechanism can be stuck in out the damage that does not receive electric arc or metallic apart from extreme position, protection spring with contact rapidly; High safety, more safe and reliable during use.
Description of drawings:
Fig. 1 is the decomposing schematic representation that the utility model is used for the structure of contact terminal of breaker of plastic casing.
Fig. 2 is the front view that structure of contact terminal that the utility model is used for breaker of plastic casing removes cover plate.
Fig. 3 is the end view that the utility model is used for the structure of contact terminal of breaker of plastic casing.
Fig. 4 is the cutaway view of A-A among Fig. 3.
Fig. 5 is the structure chart that the utility model is used for the structure of contact terminal operating state one of breaker of plastic casing.
Fig. 6 is the structure chart that the utility model is used for the structure of contact terminal operating state two of breaker of plastic casing.
Fig. 7 is the front view that the utility model is used for the structure of contact terminal moving contact of breaker of plastic casing.
Fig. 8 is the front view that the utility model is used for the structure of contact terminal arm-tie of breaker of plastic casing.
Fig. 9 is the front view that the utility model is used for the structure of contact terminal action contact frame of breaker of plastic casing.
Figure 10 is the breaker of plastic casing cutaway view that the utility model provides.
Embodiment:
Referring to Fig. 1 to Fig. 6; The utility model that provides according to the utility model is used for the embodiment of the structure of contact terminal of breaker of plastic casing, comprises action contact frame 1, is installed in the moving contact 2 in the said action contact frame 1, pull bar 3 that is connected with said moving contact 2 and the extension spring 4 that is used to provide said moving contact 2 pressure; One end of said pull bar 3 is provided with tension spring shaft 5; An other end is provided with axis 6, has chute 11 on the said action contact frame 1, and said tension spring shaft 5 slidably is installed in the said chute 21; Said moving contact 2 is provided with draw-in groove 21, and said axis 6 cards lean against in the said draw-in groove 21.Be provided with stroke groove 12 in the said action contact frame 1, said moving contact 2 is arranged in the said stroke groove 12, and said moving contact 2 middle parts are hinged on the said action contact frame 1, and said moving contact 2 two ends protrusion stroke groove 12 reveals to be put outside.Referring to Fig. 4, extension spring 4 links to each other with pull bar 3 through tension spring shaft 5, and pull bar 3 is against moving contact 2 through axis 6 cards; During this position; Extension spring 4 provides spring force to act on tension spring shaft 5, tension spring shaft 5 effects and pull bar 3, and pull bar 3 acts on moving contact 2 so that contact pressure to be provided through axis.Tension spring shaft 5 can be free movable in chute 11.Analyze through the state of big electric current during at present with circuit breaker short circuit, when circuit breaker passed through big electric current, moving contact 2 was under the effect of electrodynamic repulsion force at this moment, and what moving contact 2 will be exceedingly fast turns clockwise, and action contact frame 1 meeting holding position is motionless.Referring to Fig. 5; Drive moving contact 2 rotations when electromagnetic repulsion force overcomes moving contact 2 extension spring pressure, when rotating to Fig. 5 position, moving contact 2 will no longer stop turning clockwise of moving contact 2 at the pressure of extension spring 4; The counterclockwise pressure that acts on moving contact 2 is zero, and this is the dead point of extension spring 4.Behind this dead point, extension spring 4 will provide clockwise pressure, help scolding out of moving contact 2.Referring to Fig. 6, behind extension spring 4 dead points, extension spring 4 provides clockwise pulling force, makes moving contact 2 to be rotated counterclockwise.In the said process, in a single day moving contact 2 receives electrodynamic repulsion force to scold out a smaller angle, and gripping mechanism can be stuck in out the damage that does not receive electric arc or metallic apart from extreme position, protection spring with moving contact 2 rapidly.Safe and reliable in the use.
Referring to Fig. 7, the hinge hole at said moving contact 2 middle parts is a slotted eye, can guarantee the pressure balance on moving contact 2 both sides.
Referring to Fig. 2 and Fig. 9, according to the utility model the above embodiments, said action contact frame 1 both sides are provided with extension spring groove 13, and said extension spring 4 is positioned at said extension spring groove 13.Said extension spring 4 is two, lays respectively at the left and right sides of said action contact frame, and the end of said two extension springs 4 is enclosed within the two ends of said tension spring shaft 5 respectively.Extension spring groove 13 be arranged so that structure is compact more, dwindles small product size.
Referring to Fig. 8, according to the utility model the above embodiments, an end of said pull bar 3 is provided with circular hole 31, and an other end is provided with C shape groove 32, and said axis 6 is installed in the said circular hole 31, and said tension spring shaft 5 cards lean against in the said C shape groove 32.In moving contact 2 rotary courses, C shape groove 32 outsides at tension spring shaft 5 places do not stress, and therefore are set to C shape groove 32, have practiced thrift material, have reduced processing technology.
Referring to Fig. 7, according to the utility model the above embodiments, said draw-in groove 21 is two, and is positioned at the both sides of said moving contact 2 pin joint vertical lines.Draw-in groove 21 structure Design and advantage are identical with above-mentioned C shape groove 32.
Referring to Fig. 1 and Fig. 9; According to the utility model the above embodiments; The both sides of said action contact frame 1 are equipped with cover plate 7; The bilateral symmetry of said action contact frame 1 is provided with a plurality of hole clippings 14, and said cover plate 7 is provided with fixture block 71, and said cover plate 7 is through said fixture block 71 and the both sides of said hole clipping 14 matching and fixing at said action contact frame 1.The installation of cover plate 7 can prevent that extension spring 4 from receiving external force and come off, and prevents that 4 long-time revealing of extension spring from putting outside, is infected with dust or gets rusty and influence elastic effect.Cover plate 7 has increased the seal of whole rotating dual-breakpoint contact mechanism, helps the control of electric arc trend.
Referring to Figure 10; The embodiment of the breaker of plastic casing that provides according to the utility model; Comprise housing 8, be installed in arc quenching system 9 and structure of contact terminal 10 in the said housing 8; Described housing 8 and arc quenching system 9 be mature technique comparatively in the prior art, repeat no more here, and the structure of contact terminal 10 described in the present embodiment is the structure of contact terminal that is used for breaker of plastic casing described in the foregoing description.
Although illustrated and described the embodiment of the utility model; For those of ordinary skill in the art; Be appreciated that under the situation of principle that does not break away from the utility model and spirit and can change that the scope of the utility model is limited accompanying claims and equivalent thereof to these embodiment.
Claims (8)
1. a structure of contact terminal that is used for breaker of plastic casing comprises action contact frame, is installed in the moving contact in the said action contact frame, pull bar that is connected with said moving contact and the extension spring that is used to provide said moving contact pressure; It is characterized in that: an end of said pull bar is provided with tension spring shaft; An other end is provided with axis, has chute on the said action contact frame, and said tension spring shaft slidably is installed in the said chute; Said moving contact is provided with draw-in groove, and said axis card leans against in the said draw-in groove.
2. the structure of contact terminal that is used for breaker of plastic casing according to claim 1; It is characterized in that: be provided with the stroke groove in the said action contact frame; Said moving contact is arranged in the said stroke groove, and said moving contact middle part is hinged on the said action contact frame, and said moving contact two ends protrusion stroke groove reveals to be put outside.
3. the structure of contact terminal that is used for breaker of plastic casing according to claim 1 is characterized in that: said action contact frame both sides are provided with the extension spring groove, and said extension spring is positioned at said extension spring groove.
4. the structure of contact terminal that is used for breaker of plastic casing according to claim 1 is characterized in that: said extension spring is two, lays respectively at the left and right sides of said action contact frame, and the end of said two extension springs is enclosed within the two ends of said tension spring shaft respectively.
5. the structure of contact terminal that is used for breaker of plastic casing according to claim 1 is characterized in that: an end of said pull bar is provided with circular hole, and an other end is provided with C shape groove, and said axis is installed in the said circular hole, and said tension spring shaft card leans against in the said C shape groove.
6. the structure of contact terminal that is used for breaker of plastic casing according to claim 1 is characterized in that: said draw-in groove is two, and is positioned at the both sides of said moving contact pin joint vertical line.
7. the structure of contact terminal that is used for breaker of plastic casing according to claim 1; It is characterized in that: the both sides of said action contact frame are equipped with cover plate; The bilateral symmetry of said action contact frame is provided with a plurality of hole clippings; Said cover plate is provided with fixture block, and said cover plate is through said fixture block and the said hole clipping matching and fixing both sides at said action contact frame.
8. a breaker of plastic casing comprises housing, is installed in arc quenching system and structure of contact terminal in the said housing, and it is characterized in that: described structure of contact terminal is the described structure of contact terminal of arbitrary claim in the aforesaid right requirement 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120463742XU CN202352601U (en) | 2011-11-21 | 2011-11-21 | Contact structure for moulded case circuit breakers and moulded case circuit breaker using contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120463742XU CN202352601U (en) | 2011-11-21 | 2011-11-21 | Contact structure for moulded case circuit breakers and moulded case circuit breaker using contact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202352601U true CN202352601U (en) | 2012-07-25 |
Family
ID=46541584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120463742XU Expired - Fee Related CN202352601U (en) | 2011-11-21 | 2011-11-21 | Contact structure for moulded case circuit breakers and moulded case circuit breaker using contact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202352601U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403171A (en) * | 2011-11-21 | 2012-04-04 | 科都电气有限公司 | Contact structure for molded case circuit breaker and molded case circuit breaker using the same |
| CN107578967A (en) * | 2017-10-24 | 2018-01-12 | 法泰电器（江苏）股份有限公司 | A kind of breaker of plastic casing rotary type double-breakpoint structure of contact terminal |
-
2011
- 2011-11-21 CN CN201120463742XU patent/CN202352601U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403171A (en) * | 2011-11-21 | 2012-04-04 | 科都电气有限公司 | Contact structure for molded case circuit breaker and molded case circuit breaker using the same |
| CN107578967A (en) * | 2017-10-24 | 2018-01-12 | 法泰电器（江苏）股份有限公司 | A kind of breaker of plastic casing rotary type double-breakpoint structure of contact terminal |
| CN107578967B (en) * | 2017-10-24 | 2020-08-14 | 法泰电器（江苏）股份有限公司 | Rotary double-breakpoint contact structure of molded case circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20151121 |
|
| EXPY | Termination of patent right or utility model |