CN201417720Y - Electromagnetic over current tripping device of circuit breaker - Google Patents
Electromagnetic over current tripping device of circuit breaker Download PDFInfo
- Publication number
- CN201417720Y CN201417720Y CN2009200428907U CN200920042890U CN201417720Y CN 201417720 Y CN201417720 Y CN 201417720Y CN 2009200428907 U CN2009200428907 U CN 2009200428907U CN 200920042890 U CN200920042890 U CN 200920042890U CN 201417720 Y CN201417720 Y CN 201417720Y
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- pull bar
- circuit breaker
- armature
- draw
- iron core
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Abstract
An electromagnetic over current tripping device of circuit breaker belongs to the technical field of low-voltage electric appliances, which comprises a draw rod seat which is used for being boarded onthe casing wall of an arc-extinguishing chamber casing of a circuit breaker, and is provided with a draw rod holding cavity; an elastic element which is arranged in the draw rod holding cavity, a draw rod which is vertically matched in the draw rod holding cavity in a sliding way, and whose bottom is contacted with the elastic element; an iron core which is mounted on the top portion of one end of the length direction of the arc-extinguishing chamber casing and corresponds to the draw rod; an armature which is used to directly actuate the hasp of an operating mechanism of the circuit breaker,and whose one end is connected with the top portion of the draw rod and is matched with the hasp and other end is connected with the iron core and corresponds to the upper portion of the iron core. The electromagnetic over current tripping device has the advantages of reducing occupied space, improving the reliability and the stability of the circuit breaker, and assuring the personal safety andsafety of circuit and power supply equipment.
Description
Technical field
The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of electromagnetic short current protective device for breaker, is used to activate the snap close of circuit breaker operation mechanism, makes circuit breaker trip.
Background technology
Breaker of plastic casing is applicable in the low voltage power distribution network, is used to distribute electric energy and protective circuit, power supply and power consumption equipment, and circuit breaker has overload, short circuit and under-voltage protection function, uses the damage of avoiding circuit and power-supply device.Industry is known, and the length of short-circuit protection operate time can directly influence the breaking capacity of circuit breaker.
In existing rotary dual-interruption point breaker; the structure of back level short-circuit protection generally includes: short circuit adjusting knob, short circuit adjusting rod and push rod; when short circuit takes place; yoke attracts armature; armature overcomes counter-force and promotes the short circuit adjusting rod; by the short circuit adjusting rod push rod is discharged, the snap close by the push rod promotion circuit breaker operation mechanism that discharges disconnects circuit breaker.Obvious, make the snap close action of circuit breaker operation mechanism, must do transition by push rod, that is to say that push rod taking on the bridge between short circuit adjusting rod and the snap close or claiming the effect of transition member, can not directly activate snap close by the short circuit adjusting rod.Therefore, the form that activates snap close shows as indirect type, just because of the indirect actuating mode that has the push rod transition, thereby cause armature movement to push rod, and then can't shorten by the time that push rod promotes the snap close of circuit breaker operation mechanism, the shortcoming that is caused is: the low and poor stability of reliability that makes the circuit breaker open circuit on the one hand; Be not enough to reduce short circuit on the other hand to personal safety, influence that circuit and power-supply device caused.And for the electronic trip unit of electronic breaker; the operate time of electronic trip unit is also longer than the operate time of aforesaid back level short-circuit protection; because instantaneous operation will be through the processing of a series of signal of telecommunication; and then send signal and trigger circuit breaker tripping for the electronic type tripping relay, thereby make the shortcoming of aforesaid two aspects more outstanding.
Summary of the invention
Task of the present utility model is to provide a kind of overall volume little and help to dwindle and take up room, can directly act on the snap close of circuit breaker operation mechanism and thread off prior to back level thermo magnetic trip release device or electronic trip unit when using when being embodied in short circuit overcurrent, shorten the drop-away time of circuit breaker, the reliability and stability of improving circuit breaker and use and guarantee personal safety and the circuit breaker electric magnetic-type overcurrent release device of the safety of circuit and power-supply device.
Task of the present utility model is finished like this, and a kind of circuit breaker electric magnetic-type overcurrent release device comprises that one is used to carry the draw-bar seat on the shell wall of arc control device housing of circuit breaker, and this draw-bar seat has a pull bar containing cavity; One flexible member, be located at described pull bar containing cavity in; One pull bar slides up and down to sliding fitting in the pull bar containing cavity, and the bottom of this pull bar contacts with described flexible member; One iron core is installed in the top of an end of the length direction of described arc control device housing, and corresponding with described pull bar; One is used for directly activating the armature of the snap close of circuit breaker operation mechanism, and an end connects with the top of described pull bar and matches with described snap close, the other end and the connection of described iron core and corresponding to the top of iron core.
In a specific embodiment of the present utility model, extended first on the top end face of described pull bar, second positive stop hook, first, space between second positive stop hook constitutes armature pull bar chamber, extended a flexible member positioning boss on the bottom end face of pull bar, match with the flexible member positioning boss in the upper end of described flexible member, and the flexible member that keep out in the pull bar containing cavity of described draw-bar seat the lower end of flexible member supports in the pit, the position placed in the middle of one end of described armature has been bent into an armature pull bar, the top of this armature pull bar and then be bent with a hook, it is protruding that a tenon is equipped with at the position placed in the middle of the other end of armature, wherein, described armature pull bar is corresponding to described armature pull bar chamber, and hook is stuck in armature pull bar chamber, matches with described snap close, and the protruding and described iron core joggle of described tenon cooperates.
In another specific embodiment of the present utility model, form right angle relation between described armature pull bar and the armature, and form right angle relation between described hook and the armature pull bar.
Go back in the specific embodiment of the present utility model, the shape of the profile of described armature is zigzag.
In another specific embodiment of the present utility model, one end of described iron core is bent with the first folding wall, and the other end is bent with the second folding wall, and the middle part of iron core offers fixing hole, wherein: offer mortise on the described first folding wall, described tenon tenon is gone in the mortise.
In another specific embodiment of the present utility model, the both sides of the short transverse of described pull bar have respectively extended at least one positive stop lug boss, the top in a pair of wall chamber that corresponds to each other of the pull bar containing cavity of described draw-bar seat respectively extends one and is used for the card of described positive stop lug boss block protrudingly, and described positive stop lug boss is corresponding to the protruding below of described card.
More of the present utility model and in specific embodiment, described arc control device housing comprises first valve and second valve, the cooperation that faces each other of first, second valve, the end of shell wall select the length direction of a valve in appointing of described first, second valve is provided with the draw-bar seat that is used to scoop out described draw-bar seat and scoops out parts, and described draw-bar seat is fixed on described draw-bar seat and scoops out on the parts.
Of the present utility model again more and in specific embodiment, it is alignment pin that described draw-bar seat scoops out parts, it is a pair of that the quantity of alignment pin has at least, keeps angular dependence each other.
Therefore the advantage of the technical scheme that the utility model provides: draw-bar seat, pull bar, iron core, flexible member and armature assembly each other are reasonable, and it is little and help to dwindle and take up room to have overall volume; Match with the snap close of circuit breaker operation mechanism by armature, thereby the mode of the indirect actuating snap close in the change prior art is into directly activating snap close, ensured when overcurrent, dropout prior to back level thermo magnetic trip release device or electronic trip unit, dropout (tripping operation) time of circuit breaker is shortened, both promote the reliability and stability of circuit breaker, guaranteed the safety of personal safety and circuit and power-supply device again.
Description of drawings
Fig. 1 is an embodiment assembling assumption diagram of circuit breaker electric magnetic-type overcurrent release device of the present utility model.
Fig. 2 is the example structure figure of the iron core 2 of circuit breaker electric magnetic-type overcurrent release device of the present utility model.
Fig. 3 is the example structure figure of circuit breaker electric magnetic-type overcurrent release device draw-bar seat 5 of the present utility model.
Fig. 4 is the structure chart after Fig. 1 assembling.
Embodiment
For the auditor and the public who makes Patent Office can be expressly understood technical spirit of the present utility model and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be considered as the technical solution of the utility model category.
Ask for an interview Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the reason known as industry, circuit breaker has arc-extinguishing mechanism, arc-extinguishing mechanism has the arc control device housing 7 that constitutes arc control device, arc control device housing 7 is made of the merging (bat is closed) that faces each other of first valve 71 and second valve 72, first, second valve 71, in the 72 formed shell chambeies Fig. 1 is set, do not give the arc extinguishing grid pieces that belongs to known technology fully that illustrates among Fig. 4 and touch bridge as the activity of moving contact, activity is touched bridge and is matched with fixed contact 8 shown in Fig. 1 and Fig. 4, owing to be the circuit breaker of double break point, so fixed contact 8 has a pair of (only showing one among the figure).In the present embodiment, extended draw-bar seat on the outer wall to an end of the length direction of first valve 71 and scooped out parts 73, so that for the following draw-bar seat that will illustrate 5 location.Here the notion of being said that scoops out a speech that scoops out parts is meant to draw-bar seat 5 is installed provides service.In the present embodiment, the applicant scoops out parts 73 with a pair of alignment pin that constitutes each other angular dependence as draw-bar seat, and draw-bar seat scoops out parts 73 one and is formed on first valve 71.Yet, if being scooped out parts 73, draw-bar seat is formed on second valve 72, should be considered as equivalence far and away so.Again, scoop out parts 73, multiple variation can be arranged as draw-bar seat, for example on first valve 71 or second valve 75, extend the dovetail raised line, and on draw-bar seat 5, offer the dovetail groove that matches with the dovetail raised line, and dovetail recessed is inserted in Bodhisattva's tail groove in the inserting mode, vice versa.
Draw-bar seat 5 has a pull bar containing cavity 51, is concaved with flexible member supporting pit 511 in pull bar containing cavity 51, and certainly, also variable elastic element supporting pit 511 is a flexible member support lug.At pull bar containing cavity 51 corresponding cavity walls is that the top of the left right chamber wall of Fig. 1, Fig. 3 and location status shown in Figure 4 respectively is extruded with a card protruding 512.By shown in Figure 3, on the wall body of draw-bar seat 5, more particularly on the wall body of the front and back of draw-bar seat 5, offer a pair of remain equally to angular dependence and scoop out the corresponding and adaptive location hole 52 of parts 73 with aforesaid draw-bar seat.Because as described above, the applicant has selected a pair of alignment pin to scoop out parts 73 as draw-bar seat, and therefore a pair of alignment pin is fastened with a bolt or latch in a pair of location hole 52, thereby draw-bar seat 5 is attached to or claims to place on first valve 71.By Fig. 1 and shown in Figure 4, one flexible member 6 and a pull bar 4 place pull bar containing cavity 51 successively, wherein, one end of flexible member 6 is that the lower end of Fig. 1 and location status shown in Figure 4 is supported on the aforesaid flexible member supporting pit 511, the upper end is positioned on the flexible member boss 44 that extends on pull bar 4 lower end surfaces, the flexible member 6 preferred coil springs that adopt.Be extended with on the upper end end face of pull bar 4 and be made into first, second right positive stop hook 41,42 each other, the zone between first, second positive stop hook 41,42 constitutes armature pull bar chamber 43, and the corresponding both sides of the short transverse of pull bar 4 have respectively extended a pair of positive stop lug boss 45.Because after pull bar 4 is installed in the pull bar containing cavity 51 of draw-bar seat 5, positive stop lug boss 45 is corresponding to the below of blocking protruding 512, so pull bar 4 is in the process that fluctuates, and pull bar 4 can be by flexible member 4 bullets from pull bar containing cavity 51.And positive stop lug boss 45 also can play the contact area that reduces pull bar 4 and pull bar containing cavity 51, and frictional force is reduced.
Please see Fig. 3 by emphasis, an end of iron core 2 has one first folding wall 21, and the other end has one second folding wall 22, the middle part offers fixing hole 23, and on first flanging 21, offer mortise 211, because the existence of first, second folding wall 21,22, thereby make the shape of whole iron core 2 trend that takes the shape of the letter U.
Emphasis is seen Fig. 1 and Fig. 4, and the applicant mentions in front, and as the circuit breaker of double break point, fixed contact 8 should have a pair of, and also a pair of fixed contact 8 is called upper static contact and following fixed contact traditionally.Through hole on the fixed contact 8 is to be used for using for fixed contact 8 and the back level thermo magnetic trip release device or the electronic trip unit connection of circuit breaker.Iron core 2 is installed in the below of a fixed contact 8 on the top in the arc control device housing 7, and the screwed hole 23 on the iron core 2 is used to connect level thermo magnetic trip release device or electronic trip unit behind the circuit breaker.The position of iron core 2 is corresponding with draw-bar seat 5, and more particularly, the second folding wall 22 of iron core 2 is corresponding with pull bar 4.Implement to connect by armature 3 between iron core 2 and the pull bar 4, constitute one substantially and be 90 ° of armature pull bars 31 that are or claim right-angle relationship between the armature 3 at an end of armature 3, the top of armature pull bar 31 and then be bent with one and constitute 90 ° of hooks that are 311 with armature pull bar 31, the position placed in the middle of the other end of armature 3 is extended with a tenon boss 32.Armature pull bar 31 is corresponding in the aforesaid armature pull bar chamber 43, and links up with 311 tops corresponding to a pair of first, second positive stop hook 41,42, and tenon protruding 32 cooperates with aforesaid mortise 211 joggles, and promptly protruding 32 tenons of tenon are gone into mortise 211.See that by Fig. 4 hook 311 matches with the snap close 11 of circuit breaker operation mechanism 1, that is, link up with 311 tops corresponding to snap close 11.The shape of whole armature 3 trends towards zigzag or is referred to as font.
The applicant narrates operation principle of the present utility model in conjunction with Fig. 1 and Fig. 4, when fault current passes through fixed contact 8, produce electromagnetic attraction between iron core 2 and the armature 3, when electromagnetic attraction during greater than the counter-force of flexible member 6, promptly, when electromagnetic attraction overcomes the active force of flexible member 6, armature 3 is swung to iron core 2 directions around the mortise 211 on the iron core 2, behind the swing certain angle, contact with the snap close 11 of circuit breaker operation mechanism 1 by the hook 311 on the armature pull bar 31 of armature 3, activate snap close 11, the rapid release of circuit breaker operation mechanism is threaded off, realize circuit breaker trip.Behind the circuit breaker trip, fault current is cut off, electromagnetic attraction between iron core 2 and the armature 3 disappears, pull bar 4 upwards slides at the chamber wall of the pull bar containing cavity 51 of reset force (restoring force) the effect lower edge of flexible member 6 draw-bar seat 5, upwards the degree of sliding is: a pair of positive stop lug boss 45 on the pull bar 4 (top a pair of) with block protruding 512 and contact, armature 3 resets thereupon.
Claims (8)
1, a kind of circuit breaker electric magnetic-type overcurrent release device is characterized in that comprising that one is used to carry the draw-bar seat (5) on the shell wall of arc control device housing (7) of circuit breaker, and this draw-bar seat (5) has a pull bar containing cavity (51); One flexible member (6), be located at described pull bar containing cavity (51) in; One pull bar (4) slides up and down to sliding fitting in the pull bar containing cavity (51), and the bottom of this pull bar (4) contacts with described flexible member (6); One iron core (2) is installed in the top of an end of the length direction of described arc control device housing (7), and corresponding with described pull bar (4); One is used for directly activating the armature (3) of the snap close (11) of circuit breaker operation mechanism (1), and the top of an end and described pull bar (4) connects and matches with described snap close (11), the other end and described iron core (2) connection and corresponding to the top of iron core (2).
2, circuit breaker electric magnetic-type overcurrent release device according to claim 1, it is characterized in that having extended first on the top end face of described pull bar (4), second positive stop hook (41,42), first, second positive stop hook (41,42) space between constitutes armature pull bar chamber (43), extended a flexible member positioning boss (44) on the bottom end face of pull bar (4), match with flexible member positioning boss (44) in the upper end of described flexible member (6), and the flexible member that keep out in the pull bar containing cavity (51) of described draw-bar seat (5) lower end of flexible member (6) supports in the pit (511), the position placed in the middle of one end of described armature (3) has been bent into an armature pull bar (31), the top of this armature pull bar (31) so be bent with one the hook (311), a tenon protruding (32) is equipped with at the position placed in the middle of the other end of armature (3), wherein, described armature pull bar (31) is corresponding to described armature pull bar chamber (43), be stuck in armature pull bar chamber (43) and link up with (311), match with described snap close (11), described tenon protruding (32) cooperates with described iron core (2) joggle.
3, circuit breaker electric magnetic-type overcurrent release device according to claim 2 is characterized in that form right angle relation between described armature pull bar (31) and the armature (3), and form right angle relation between described hook (311) and the armature pull bar (31).
4, according to claim 1 or 2 or 3 described circuit breaker electric magnetic-type overcurrent release devices, it is characterized in that the shape of the profile of described armature (3) is zigzag.
5, circuit breaker electric magnetic-type overcurrent release device according to claim 2, an end that it is characterized in that described iron core (2) is bent with the first folding wall (21), the other end is bent with the second folding wall (22), and the middle part of iron core (2) offers fixing hole (23), wherein: offer mortise (211) on the described first folding wall (21), described tenon protruding (32) tenon is gone in the mortise (211).
6, circuit breaker electric magnetic-type overcurrent release device according to claim 1, the both sides that it is characterized in that the short transverse of described pull bar (4) have respectively extended at least one positive stop lug boss (45), the top in a pair of wall chamber that corresponds to each other of pull bar containing cavity (51) of described draw-bar seat (5) respectively extends a card protruding (512) that is used for described positive stop lug boss (45) block, and described positive stop lug boss (45) is corresponding to the below of described card protruding (512).
7, circuit breaker electric magnetic-type overcurrent release device according to claim 1, it is characterized in that described arc control device housing (7) comprises first valve (71) and second valve (72), first, second valve (71,72) cooperation that faces each other, the end of shell wall select the length direction of a valve in appointing of described first, second valve (71,72) is provided with the draw-bar seat that is used to scoop out described draw-bar seat (5) and scoops out parts (73), and described draw-bar seat (5) is fixed on described draw-bar seat and scoops out on the parts (73).
8, circuit breaker electric magnetic-type overcurrent release device according to claim 7 is characterized in that it is alignment pin that described draw-bar seat scoops out parts (73), and it is a pair of that the quantity of alignment pin has at least, keeps angular dependence each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200428907U CN201417720Y (en) | 2009-06-08 | 2009-06-08 | Electromagnetic over current tripping device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200428907U CN201417720Y (en) | 2009-06-08 | 2009-06-08 | Electromagnetic over current tripping device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417720Y true CN201417720Y (en) | 2010-03-03 |
Family
ID=41794147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200428907U Expired - Lifetime CN201417720Y (en) | 2009-06-08 | 2009-06-08 | Electromagnetic over current tripping device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201417720Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288572A (en) * | 2017-12-28 | 2018-07-17 | 温州市新蓝天电器有限公司 | The breaker of integrated latch tripping mechanism |
-
2009
- 2009-06-08 CN CN2009200428907U patent/CN201417720Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288572A (en) * | 2017-12-28 | 2018-07-17 | 温州市新蓝天电器有限公司 | The breaker of integrated latch tripping mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |