CN101740276B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN101740276B CN101740276B CN200910211412.9A CN200910211412A CN101740276B CN 101740276 B CN101740276 B CN 101740276B CN 200910211412 A CN200910211412 A CN 200910211412A CN 101740276 B CN101740276 B CN 101740276B
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Abstract
The present invention provides a circuit breaker which is capable of ensuring perfect magnetizing characteristic of a fixing iron-core to a moveable iron-core. The circuit breaker has a magnetic movable iron-core and a magnetic fixing iron-core which has a magnetic pole right opposing to a part to be magnetized of the movable iron-core, a support part (which is equivalent with a U-shaped shaft holding part, a shaft holding groove and a shaft) capable of supporting the movable iron-core in a free rotation way is positioned on the fixing iron-core, the magnetizing movement of the moveable iron-core by the fixing iron-core can be cut off automatically by utilizing the magnetic attractive force between the magnetic pole and the part to be magnetized, a magnetic resistance construction (which is equivalent with a sidestep part, a U-shaped shaft holding part and a bearing part that are separated with each other because of the sidestep part ) is positioned on the support part, and the magnetic resistance construction is for generating leakage magnetic bundles from other parts of the fixing iron-core except the magnetic pole.
Description
Technical field
The present invention relates to a kind of circuit-breaker, the fixed iron core of the magnetic movable core of its tool and magnetic, this fixed iron core have with the portion that is attracted of aforementioned movable core over against magnetic pole, by utilizing at the mutual magnetic attraction producing of aforementioned magnetic pole and the portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, cuts off automatically.
Background technology
Figure 11 means the oblique view of wanting portion of the tripgear of existing circuit-breaker, and Figure 12 is the end view of Figure 11.In the drawings, the 1st, fixed iron core, by magnetic materials such as iron plates, with tabular, formed, the 2nd, magnetic support portion, by nonmagnetic substance bendings such as stainless-steel sheets, for " コ " word shape forms, in bending, be an opposite side of " コ " word shape, in bottom, there is a pair of retainer 2a, in upper end, there is a pair of carbine lacing film 2b, in substantial middle portion, there is a pair of U word groove 2c.The 3rd, heater, bottom has internal thread part 3a, and for linking with L word shape and shunt terminal (not shown), upper end is connected with the bonding conductor 5 being connected with load side terminal 4.The 6th, flat bimetal leaf is thermostatic element, between itself and fixed iron core 1, clamps heater 3 and magnetic support portion 2, utilizes rivet 7 fastening integratedly.8 are mounted in the adjustment screw on the free end of bimetal leaf 6, for adjusting hot operating characteristics.The 9th, clamp nut.
The 10th, movable core,, is had with " コ " word shape bending and form by magnetic materials such as iron plates: a pair of can moving plate 10a, itself and fixed iron core 1 over against; Bearing portion 10b, it is positioned on the opposite side with the bending of " コ " word shape; Operating sheet 10c, it is for pressing the trip(ping) bar (not shown) of open-close mechanism section, and wherein, the side being bent as " コ " word shape extends upward, and this operating sheet 10c is positioned at the front end of this side; And protruding 10d, it is positioned on the bottom surface of " コ " word shape, by being pressed on the retainer 2a of magnetic support portion 2.The 11st, two recovery springs of turning round shape, in the substantial middle portion of movable core 10, are supported by axle 12 earth's axis free to rotate, and meanwhile, two 11a of foot that turn round shape spring are by above-mentioned carbine lacing film 2b hook.In addition, this axle 12 inserts in a pair of U word groove 2c of magnetic support portion 2, is assembled into tripgear.
In the tripgear of this existing circuit-breaker, if in the heater 3 being connected with shunt terminal with conductor 5 current flowing, produce the flux through fixed iron core 1 and movable core 10.
The attraction being produced by flux during tripping operation that utilization causes at electromagnetism, movable core 10 opposings recover the spring force of springs 11 and are fixed unshakable in one's determination 1 to attract.By the action of this movable core 10, the trip(ping) bar of open-close mechanism section rotates, and automatically cuts off.In addition, when by the moving tripping operation causing of heat, by the flexure operation of bimetal leaf 6, the trip(ping) bar of open-close mechanism section rotates, then, and by automatically cutting off with above-mentioned same action.
Patent documentation 1: Unexamined Patent 8-96689 communique (Fig. 1 to 3 and explanation thereof)
Summary of the invention
In the tripgear of above-mentioned existing circuit-breaker, in order not produce flux in fulcrum, and make to form the fixed iron core 1 of tripgear and movable core 10 across the magnetic support portion 2 of nonmagnetic substance.But, because across magnetic support portion 2, so exist the size fluctuation because of each parts that fixed iron core 1 and the gap of movable core 10 are changed, there is the unsettled problem of characteristic that attracts.In addition, because append the magnetic support portion 2 with complicated shape, thereby become high price.In addition, fixed iron core 1, magnetic support portion 2, heater 3, bimetal leaf 6 utilize rivet 7 fastening integratedly, but because can not be disposable fastening, so first fastening magnetic support portion 2 and heater 3, then fastening by magnetic support portion 2 and the fastening part forming of heater 3 and fixed iron core 1, finally utilize the fastening bimetal leaf 6 of rivet 7, have the problem that expends built-up time.
The present invention is in view of afore-mentioned proposition, and its object is, guarantees the good attraction characteristic of movable core and fixed iron core.
The magnetic movable core of circuit circuiting appliance the present invention relates to and the fixed iron core of magnetic, this fixed iron core have with the portion that is attracted of aforementioned movable core over against magnetic pole, the support structure portion that supports aforementioned movable core is set free to rotately on aforementioned fixed iron core, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off, wherein, magnetic resistance structure is set in aforementioned support structure portion, it becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core.
In addition, the magnetic movable core of circuit circuiting appliance the present invention relates to and the fixed iron core of magnetic, this fixed iron core have with the portion that is attracted of aforementioned movable core over against magnetic pole, support the support structure portion of aforementioned movable core free to rotately, be arranged at dispersedly on aforementioned fixed iron core and aforementioned movable core, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the aforementioned portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off, wherein, magnetic resistance is set in aforementioned support structure portion and increases structure, it makes to increase from the magnetic resistance of the leakage flux of the part generation except aforementioned magnetic pole of aforementioned fixed iron core.
The present invention is a kind of circuit-breaker, because the fixed iron core of the magnetic movable core of its tool and magnetic, this fixed iron core have with the portion that is attracted of aforementioned movable core over against magnetic pole, the support structure portion that supports aforementioned movable core is set free to rotately on aforementioned fixed iron core, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off, wherein, magnetic resistance structure is set in aforementioned support structure portion, it becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core, so can guarantee the good attraction characteristic of fixed iron core to movable core.
In addition, fixed iron core due to the magnetic movable core of circuit circuiting appliance involved in the present invention and magnetic, this fixed iron core have with the portion that is attracted of aforementioned movable core over against magnetic pole, support the support structure portion of aforementioned movable core free to rotately, be arranged at dispersedly on aforementioned fixed iron core and aforementioned movable core, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the aforementioned portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off, wherein, magnetic resistance is set in aforementioned support structure portion and increases structure, it makes to increase from the magnetic resistance of the leakage flux of the part generation except aforementioned magnetic pole of aforementioned fixed iron core, so can guarantee the good attraction characteristic of fixed iron core to movable core.
Accompanying drawing explanation
Fig. 1 means the figure of embodiments of the present invention 1, means the oblique view of an example wanting portion of the tripgear of circuit-breaker.
Fig. 2 means the figure of embodiments of the present invention 1, means the end view of an example wanting portion of the tripgear of circuit-breaker.
Fig. 3 means the figure of embodiments of the present invention 1, means the exploded perspective view of an example wanting portion of the tripgear of circuit-breaker.
Fig. 4 means the figure of embodiments of the present invention 1, is the vertical profile end view that is assembled with the circuit-breaker of the illustrative tripgear of Fig. 1 to Fig. 4.
Fig. 5 means the figure of embodiments of the present invention 2, means the oblique view of other example of wanting portion of the tripgear of circuit-breaker.
Fig. 6 means the figure of embodiments of the present invention 2, means the end view of other example of wanting portion of the tripgear of circuit-breaker.
Fig. 7 means the figure of embodiments of the present invention 2, means the exploded perspective view of other example of wanting portion of the tripgear of circuit-breaker.
Fig. 8 means the figure of embodiments of the present invention 3, means the oblique view of other example of wanting portion of the tripgear of circuit-breaker.
Fig. 9 means the figure of embodiments of the present invention 3, means the exploded perspective view of other example of wanting portion of the tripgear of circuit-breaker.
Figure 10 means the figure of embodiments of the present invention 3, is (a) end view of the movable core portion in Fig. 8 and Fig. 9, is (b) front view of the movable core portion in Fig. 8 and Fig. 9.
Figure 11 means the oblique view of wanting portion of the tripgear of existing circuit-breaker.
Figure 12 means the end view of wanting portion of the tripgear of existing circuit-breaker.
Embodiment
Below, according to Fig. 1 to Fig. 4, embodiments of the present invention 1 are described.Fig. 1 means the oblique view of an example wanting portion of the tripgear of circuit-breaker, Fig. 2 means the end view of an example wanting portion of the tripgear of circuit-breaker, Fig. 3 means the exploded perspective view of an example wanting portion of the tripgear of circuit-breaker, and Fig. 4 is the vertical profile end view of having assembled the circuit-breaker of the illustrative tripgear of Fig. 1 to Fig. 3.
In Fig. 1 to Fig. 4, circuit-breaker 20 has pedestal 21, cover 22, power supply side terminal 23, fixed contact therefor 24, movable contact 25, tripgear 26, movable piece support 27, mounting screw 28 and open-close mechanism section 29.
Tripgear 26 has the thermostatic elements 33 such as fixed iron core 31, heater 32, bimetal leaf, rivet 34, adjustment screw 35, clamp nut 36, movable core 37, recovers spring 38 and axle 39.
Fixed iron core 31 has the axle maintaining part 31c of the carbine lacing film 31a of portion, the 31b of retainer portion, a pair of U-shaped, a pair of 31d of foot, bridge shape connecting portion 31e, the 31f of pair of sidewalls portion and a pair of magnetic pole 31g integratedly, in addition, also there is spatial portion 31h and a pair of axle and keep groove 31cg.
Fixed iron core 31 is by being " コ " word shape roughly by a slice magnetic material bendings such as iron plates, and forms a pair of 31d of foot, bridge shape connecting portion 31e, the 31f of pair of sidewalls portion.In addition, a pair of 31d of foot, bridge shape connecting portion 31e, the 31f of pair of sidewalls portion also can not used a chip part to form.
On a side wall portion 31f of fixed iron core 31, form at an upper portion thereof respectively carbine lacing film 31a and retainer 31b, in substantial middle portion, form an axle maintaining part 31c of U-shaped, in bottom, form a magnetic pole 31gJi Yige 31d of foot, on another side wall portion 31f, another axle maintaining part 31c that forms at an upper portion thereof respectively U-shaped, forms another magnetic pole 31g and the 31d of another foot in bottom.
In movable core 37 sides of the axle maintaining part 31c of a pair of U-shaped, form respectively and make the open axle of movable core 37 sides keep groove 31cg.
In addition, being attracted the 37a of portion, the 37b of pair of bearings portion and the 37c of operating sheet portion also can can't help a chip part and form.
In addition, protuberance 37d also can be configured in fixed iron core 31 sides.In any case, preferably by the movable core 37 at mutual butt and at least one in fixed iron core 31, reducing of the butt area unit of protuberance 37d etc. is set, in other words, by reducing of butt area unit being set on the abutting part at movable core 37 and fixed iron core 31, again in other words, on the abutting part at movable core 37 and fixed iron core 31, the magnetic resistance forming unit that increases the magnetic resistance relative with the leakage flux at this abutting part place is set, thereby increase is with respect to the magnetic resistance of the leakage flux at the aforementioned abutting part place of 31 of movable core 37 and fixed iron cores.In addition,, as long as magnetic resistance forming unit forms the magnetic resistance that increases aforementioned abutting part, be not limited to aforementioned protuberance 37d.
On movable core 37, portion forms the 37b of aforementioned bearings portion therebetween respectively, from central portion, extend upward the aforementioned operation sheet 37c of portion is set, in bottom, form and be attracted the 37a of portion, the 37b of aforementioned bearings portion is respectively formed in a pair of side portion with the bending of " コ " word shape, the aforementioned operation sheet 37c of portion is for pressing the trip(ping) bar 29a of open-close mechanism section 29, the aforementioned a pair of magnetic pole 31g that is attracted the 37a of portion and fixed iron core 31 over against.
The thermostatic element 33 consisting of flat bimetal leaf etc. is configured to, between the bridge shape connecting portion 31e of its bottom and fixed iron core 31, and the 32b of heater portion of clamping heater 32.The bridge shape connecting portion 31e of the bottom of thermostatic element 33, fixed iron core 31 and the 32b of heater portion of heater 32, fastening integratedly by rivet 34.
The bottom of thermostatic element 33 contacts with the 32b of the heater portion face of heater 32, by the 32b of heater portion, is heated.At the free end of thermostatic element 33, the adjustment screw 35 that utilizes clamp nut 36 to install is set, utilize this adjustment screw 35, as shown in known, adjust the hot operating characteristics that opens circuit and move by thermostatic element 33.
The surface of a side contrary to thermostatic element 33 of the 32b of heater portion of heater 32 and two end faces that are connected with this surface, by the bridge shape connecting portion 31e of aforementioned fixed iron core 31 and the 31f of dual-side portion of aforementioned fixed iron core 31, surrounded, by flowing through the main magnetic loop of the flux that the load current of the 32b of heater portion produces, bridge shape connecting portion 31e by aforementioned fixed iron core 31, the 31f of two side portion of aforementioned fixed iron core 31, the 37a of the portion that is attracted of aforementioned movable core 37, and be aforementionedly attracted the aforementioned primary clearance B formation being attracted between the 37a of portion and aforementioned magnetic pole 31g that the 37a of portion is not fixed under the state that unshakable in one's determination 31 aforementioned magnetic pole 31g attracts.The flux spilling in addition to aforementioned main magnetic loop is the so-called flux of sewing.
Recovering spring 38 is torsion-coil springs of singly turning round type, has spire 38a and a pair of 38b of foot, the 38c of tight winding, be fastened between movable core 37 and fixed iron core 31, always by movable core 37 to the direction pretension pulling open from fixed iron core 31.
Because stage portion 39a keeps the space length A stipulating between the axle maintaining part 31c of the U-shaped of fixed iron core 31 and the bearing portion 37b of movable core 37, so that the magnitude relationship of the size of its width A and following initial gap B (the shortest gap length) is A > B, aforementioned initial gap B is that aforementioned movable core 37 aforementioned is attracted the aforementioned distance being attracted between the 37a of portion and aforementioned magnetic pole under the state that the 37a of portion do not attract by the magnetic pole 31g of aforementioned fixed iron core 31.
In the circuit-breaker forming in the manner described above, if overload current flows on the path of power supply side terminal 23 → fixed contact therefor 24 → movable contact 25 → movable piece support 27 → internal thread part 32a → heater 32b → load side terminal 32c of portion, the heating by the 32b of heater portion makes its bending by bimetal leaf 33 heating.By this bending, by the adjustment screw 35 being arranged on bimetal leaf 33, press trip(ping) bar 29a, movable agency portion 29 actions, make circuit-breaker tripping operation.
In addition, if the large electric current such as short circuit current flow in the 32b of heater portion, utilize the large flux being produced by this large electric current, fixed iron core 31 is by hard magnetization, and the 37a of the portion that is attracted of movable core 37 is instantaneous to be attracted by magnetic pole 31g, centered by axle 39, opposing recovers the spring force of spring 38, movable core 37 rotates, and along with the rotation of this movable core 37, the 37c of operating sheet portion rotates centered by axle 39.By the rotation of the 37c of this operating sheet portion, the 37c of operating sheet portion presses trip(ping) bar 29a, with similarly aforementioned, makes circuit-breaker tripping operation and the action of opening circuit.
General in the tripgear of circuit-breaker, at movable core 37, be fixed in unshakable in one's determination 31 structures that support, the flux around producing at current path is except main magnetic loop, also can pass through aforementioned support portion, produce the larger flux of sewing, thereby make to reduce through the main flux of the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37.Through the flux of sewing of aforementioned support portion, because to the nothing effect completely of the rotational action being caused by main flux of movable core 37, become unstable so cannot obtain the tripping operation required power of action.
In the circuit-breaker forming according to aforementioned embodiments 1, in its tripgear, can utilize the stage portion 39c of the nonmagnetic axle 39 of simple shape, between the U-shaped axle maintaining part 31c of fixed iron core 31 and the bearing portion 37b of movable core 37, keep space length A, thereby be difficult for producing and sewing flux at the place, support portion of movable core 37, for example be difficult for producing the leakage flux from fixed iron core 31 to movable core 37 of sewing flux or axle 39 part places via axle 39, can make the magnetic force between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37 be difficult for reducing, guarantee the good attraction characteristic of 31 pairs of movable cores 37 of fixed iron core, and, can reduce space between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37, because manufacturing the fluctuation of each product that assembling procedure causes, thereby realize stable attraction characteristic.
In addition, by making for guaranteeing the width A of the stage portion 39c of the space length A between the U-shaped axle maintaining part 31c of fixed iron core 31 and the bearing portion 37b of movable core 37, be aforementioned movable core 37 except the aforementioned separating distance A that is attracted part the 37a of portion and the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, and the aforementioned portion of being attracted of aforementioned movable core is not by the aforementioned magnitude relationship that is attracted the initial gap B (the shortest gap length) between portion and aforementioned magnetic pole under the state of aforementioned poles attract, for the aforementioned initial gap B of aforementioned separating distance A >, thereby be difficult for producing flux at the place, support portion of aforementioned movable core 37, thereby realize stable tripping characteristic.
In addition, because configure protuberance 37d on movable core 37, make the tapered front end of this protuberance 37d and the 31b of the retainer portion butt of fixed iron core 31, so the contact area of the protuberance 37d of this abutting part office and the 31b of retainer portion reduces, thereby the magnetic resistance because of the leakage flux with respect to this abutting part office increases, at place, support portion, be difficult for producing flux, so can make tripping characteristic more stable.
In addition, when utilizing rivet 34 fastening fixed iron core 31, heater 32 and thermostatic element (bimetal leaf) 33 these 3 parts, because can disposablely carry out, this is fastening, so can shorten built-up time.
As previously mentioned, in present embodiment 1 exemplified with following circuit-breaker, the fixed iron core 31 of the magnetic movable core 37 of its tool and magnetic, this fixed iron core 31 have with the 37a of the portion that is attracted of aforementioned movable core 37 over against magnetic pole 31g, (the axle maintaining part 31c who is equivalent to U-shaped of support structure portion that supports aforementioned movable core 37 is set free to rotately on aforementioned fixed iron core, axle keeps groove 31cg, and axle 39), by utilizing the magnetic attraction producing each other at aforementioned magnetic pole 31g and the portion 37a of being attracted, the action that aforementioned movable core 37 is attracted by aforementioned fixed iron core 31, automatically cut off, wherein, magnetic resistance structure (be equivalent to utilize stage portion 39c and be separated from each other U-shaped axle maintaining part 31c and bearing portion 37b) is set in aforementioned support structure portion, it becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31.
In addition, as previously mentioned, in present embodiment 1 exemplified with following circuit-breaker, aforementioned support structure portion has the axle maintaining part 31c that the non magnetic axle 39 of aforementioned movable core 37 is installed free to rotately and is kept this axle 39, and aforementioned non magnetic axle 39 becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31.
In addition, as previously mentioned, in present embodiment 1 exemplified with following circuit-breaker, aforementioned nonmagnetic axle 39 by aforementioned movable core 37 except aforementioned part the 37a of portion and the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, the state of the bearing of trend separated (separating distance A) of this axle 39 that remains along of being attracted.
In addition, as previously mentioned, in present embodiment 1 exemplified with following circuit-breaker, make aforementioned movable core 37 except aforementioned be attracted part the 37a of portion, with the separating distance A of the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, with the aforementioned magnitude relationship that is attracted the initial gap B between the 37a of portion and aforementioned magnetic pole 31g under the state that do not attracted by aforementioned magnetic pole 31g of the 37a of the portion that is attracted of aforementioned movable core 37 is not, the aforementioned initial gap B of aforementioned separating distance A >.
In addition, as previously mentioned, in the present embodiment exemplified with following circuit-breaker, it has tripgear 26, and aforementioned tripgear 26 has: heater 32, and it consists of conductor; Fixed iron core 31, itself and aforementioned heater 32 one are installed, and have carbine lacing film 31a and retainer 31b in upper end, at central portion, have a pair of U-shaped axle maintaining part 31c and a pair of magnetic pole 31g; Movable core 37, its have with the magnetic pole 31g of aforementioned fixed iron core 31 over against the 37a of the portion that is attracted, and there is the 37b of pair of bearings portion at central portion, and in upper end, thering is the operating sheet 37c that presses trip(ping) bar 29a, this movable core 37 rotates according to the short circuit current that flows through aforementioned heater 32; And axle 39, it is at the bearing portion 37b place of aforementioned movable core 37, via the axle that recovers the U word maintaining part of the aforementioned fixed iron core 31 of spring 38 insertion, keep in groove 31cg, stage portion 39c is set in aforementioned axis 39, between its bearing portion 37b for the U-shaped axle maintaining part 31c at aforementioned fixed iron core 31 and aforementioned movable core 37, space length is set.
Below, according to Fig. 5 to Fig. 7, embodiments of the present invention 2 are described.Fig. 5 means the oblique view of other example of wanting portion of the tripgear of circuit-breaker, Fig. 6 means the end view of other example of wanting portion of the tripgear of circuit-breaker, and Fig. 7 means the exploded perspective view of other example of wanting portion of the tripgear of circuit-breaker.
In present embodiment 2, as shown in Figures 5 to 7, the fixed iron core 31 of the magnetic movable core 37 of this circuit circuiting appliance and magnetic, this fixed iron core 31 have with the 37a of the portion that is attracted of aforementioned movable core 37 over against magnetic pole 31g, support the support structure portion of aforementioned movable core 37 free to rotately, be arranged at dispersedly on aforementioned fixed iron core 31 and aforementioned movable core 37, by utilizing at aforementioned magnetic pole 31g and being aforementionedly attracted the magnetic attraction that the 37a of portion produces each other, the action that aforementioned movable core 37 is attracted by aforementioned fixed iron core 31, automatically cut off, this circuit-breaker arranges magnetic resistance and increases structure in aforementioned support structure portion, it increases the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, aforementioned support structure portion has the axle 39 forming on aforementioned movable core 37, with be arranged on aforementioned fixed iron core 31 for keeping the axle maintaining part 31c of aforementioned axis 39, between aforementioned axis maintaining part 31c and aforementioned magnetic pole 31g, spatial portion 31h is set, this spatial portion 31h becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31.
In addition, in the circuit-breaker of present embodiment 2, aforementioned fixed iron core 31 has the 31f of pair of sidewalls portion being separated from each other, 31f, with by the 31f of this pair of sidewalls portion, the bridge shape connecting portion 31e that 31f connects with bridge shape, at aforementioned each side wall portion 31f, 31f form respectively aforementioned magnetic pole 31g with on the end face contrary side of aforementioned bridge shape connecting portion 31e, at the aforementioned pair of sidewalls 31f of portion, on a side wall portion 31f in 31f, have and be positioned at and the aforementioned pair of sidewalls 31f of portion, the a pair of axle maintaining part 31c of the position that 31f is corresponding, 31c, with by this pair of axle maintaining part 31c, the wrist 31b that 31c connects with bridge shape, at the aforementioned pair of sidewalls 31f of portion, between another side wall portion 31f in 31f and the aforementioned axis maintaining part 31c corresponding with this another side wall portion 31f, form the 31h of aforesaid space portion, make the space length C of the 31h of aforesaid space portion, and the aforementioned 37a of portion that is attracted of aforementioned movable core 37 by the aforementioned magnitude relationship that is attracted the initial gap B between the 37a of portion and aforementioned magnetic pole 31g under the state of aforementioned magnetic pole 31g attraction is not, the aforementioned initial gap B of aforesaid space distance C >.
Above-mentioned structure and function in addition in present embodiment 2, since identical with aforementioned embodiments 1, so its explanation is omitted.
In the tripgear 26 of the circuit-breaker of the execution mode 2 forming in this manner, the axle maintaining part 31c of the fixed iron core 31 of magnetic, the magnetic axle 39 that 31c is integrally formed with movable core 37 with magnetic contacts, but because there is the spatial portion 31h of space length C between side wall portion 31f of fixed iron core 31 and the axle maintaining part 31c corresponding with this side wall portion 31f, thereby place can not produce flux in support portion, so due to this spatial portion 31h, be difficult for producing and leaking flux at the place, support portion of movable core 37, for example be difficult for producing the leakage flux via axle 39, or the leakage flux from fixed iron core 31 to movable core 37 at axle 39 part places, can make the magnetic force between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37 be difficult for reducing, guarantee the good attraction characteristic of 31 pairs of movable cores 37 of fixed iron core, and, can reduce gap between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37, because manufacturing the fluctuation of each product that assembling procedure causes, realize stable attraction characteristic.
In addition, with execution mode 1 similarly, by making the aforementioned portion of being attracted of space length C and aforementioned movable core by the aforementioned magnitude relationship that is attracted the initial gap B (the shortest gap length) between portion and aforementioned magnetic pole under the state of aforementioned poles attract be not, the aforementioned initial gap B of aforesaid space distance C >, thereby be difficult for producing flux at the place, support portion of aforementioned movable core 37, thereby can realize stable tripping characteristic.
In addition, as described in aforementioned, in present embodiment 2, change an angle, the following circuit-breaker of illustration, it has tripgear 26, and this tripgear 26 has: heater 32, it consists of conductor; Fixed iron core 31, itself and aforementioned heater 32 are installed integratedly, two side portion, have a pair of magnetic pole 31g; Movable core 37, its have with the magnetic pole 31g of aforementioned fixed iron core 31 over against the 37a of the portion that is attracted, at central portion, have 39， upper end, support portion and have the operating sheet 37c that presses trip(ping) bar 29a, movable core 37 rotates according to the short circuit current that flows through aforementioned heater 32; Recover spring 38, it is fastened between aforementioned movable core 37 and aforementioned fixed iron core 31, on aforementioned fixed iron core 31, wrist 31b is set, it extends from an end to the other end direction, engage with the support portion 39 of aforementioned movable core 37, in addition, on an opposite side of the wrist 31b of aforementioned fixed iron core 31, the maintaining part 31c that the support portion 39 that keeps aforementioned movable core 37 is set, arranges carbine lacing film and retainer 31b in upper end.
Below, according to Fig. 8 to Figure 10, embodiments of the present invention 3 are described.Fig. 8 means the oblique view of other example of wanting portion of the tripgear of circuit-breaker, Fig. 9 means the exploded perspective view of other example of wanting portion of the tripgear of circuit-breaker, Figure 10 (a) is the end view of the movable core portion in Fig. 8 and Fig. 9, and Figure 10 (b) is the front view of the movable core portion in Fig. 8 and Fig. 9.
In present embodiment 3, as (b) illustration of Fig. 8 to Figure 10 (a), the fixed iron core 31 of the magnetic movable core 37 of tool and magnetic, this fixed iron core 31 have with the 37a of the portion that is attracted of aforementioned movable core 37 over against magnetic pole 31g, support the support structure portion of aforementioned movable core 37 free to rotately, be arranged at dispersedly on aforementioned fixed iron core 31 and aforementioned movable core 37, by utilizing at aforementioned magnetic pole 31g and the aforementioned 37a of the portion magnetic attraction of generation each other that is attracted, the action that aforementioned movable core 37 is attracted by aforementioned fixed iron core 31, thereby automatically cut off, in this circuit-breaker, the magnetic resistance that the magnetic resistance of the leakage flux that makes to produce from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31 is increased increases structure, be arranged in aforementioned support structure portion, in addition, aforementioned support structure portion has: nonmagnetic axle 39, it is arranged on aforementioned movable core 37, and axle maintaining part 31c, it is arranged on aforementioned fixed iron core 31, and for keeping aforementioned axis 39, aforementioned nonmagnetic axle 39 becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31.
In addition, in the circuit-breaker of present embodiment 3, the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, with aforementioned movable core 37 except the aforementioned part being attracted the 37a of portion, to be greater than aforementioned being spaced apart of initial gap B under the state that the 37a of portion do not attract by aforementioned magnetic pole 31g that be attracted.
Above-mentioned structure and function in addition in present embodiment 3, since identical with aforementioned embodiments 1, so its explanation is omitted.
In tripgear 26 in the circuit-breaker of the present embodiment 3 forming in the manner described above, because aforementioned nonmagnetic axle 39 becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, in addition, the part except aforementioned magnetic pole 31g of aforementioned fixed iron core 31, with aforementioned movable core 37 except the aforementioned part being attracted the 37a of portion, to be greater than the aforementioned 37a of the portion separation not by the interval of the initial gap B under the state of aforementioned magnetic pole 31g attraction that is attracted, so be difficult for producing and leaking flux at the place, support portion of movable core 37, for example be difficult for producing the leakage flux via axle 39, or the leakage flux from fixed iron core 31 to movable core 37 at axle 39 part places, thereby can make the magnetic force between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37 be difficult for reducing, guarantee the good attraction characteristic of 31 pairs of movable cores 37 of fixed iron core, and, can reduce gap between the magnetic pole 31g of fixed iron core 31 and the 37a of the portion that is attracted of movable core 37, because manufacturing the fluctuation of each product that assembling procedure causes, thereby realize stable attraction characteristic.
In addition, as previously mentioned, in present embodiment 3, if change an angle, the following circuit-breaker of illustration, it has tripgear 26, and this tripgear 26 has: heater 32, it consists of conductor; Fixed iron core 31, itself and aforementioned heater 32 are installed integratedly, two side portion, have a pair of magnetic pole 31g; Movable core 37, its have with the magnetic pole 31g of aforementioned fixed iron core 31 over against the 37a of the portion that is attracted, the operating sheet 37c that is positioned at the support portion 39 of central portion and presses trip(ping) bar 29a, movable core 37 rotates according to the short circuit current that flows through aforementioned heater 32; Recover spring 38, it is fastened between aforementioned movable core 37 and aforementioned fixed iron core 31, the support portion of aforementioned movable core 37 39 is arranged on the maintaining part 31c of aforementioned fixed iron core 31, in sort circuit circuit breaker, the magnetic material such as to make the 37a of the portion that is attracted of aforementioned movable core 37 and operating sheet 37c be iron plate, the nonmagnetic substances such as the support portion 39 that makes aforementioned movable core 37 is stainless steel, by them by connections such as solderings.
In addition,, in each figure of Fig. 1 to Figure 10, identical label represents identical or suitable part.
Claims (14)
1. a circuit-breaker, the fixed iron core of the magnetic movable core of its tool and magnetic, this fixed iron core have with the portion that is attracted of this movable core over against magnetic pole, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off
It is characterized in that,
The support structure portion that supports aforementioned movable core has free to rotately: axle, aforementioned movable core is installed on it; And axle maintaining part, it keeps this axle,
Aforementioned movable core rotates centered by aforementioned axis,
The fixed iron core of aforementioned magnetic has the pair of sidewalls portion being separated from each other integratedly, in aforementioned pair of sidewalls portion, form on separately with the portion that is attracted of aforementioned movable core over against magnetic pole and aforementioned axis maintaining part,
Magnetic resistance structure is set in this support structure portion, and it becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core.
2. circuit-breaker as claimed in claim 1, is characterized in that,
Aforementioned axis is nonmagnetic axle, and this nonmagnetic axle becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core.
3. circuit-breaker as claimed in claim 2, is characterized in that,
Aforementioned nonmagnetic axle make aforementioned movable core except aforementioned part portion and the part except aforementioned magnetic pole of aforementioned fixed iron core, the state of the bearing of trend separation of this axle that remains along of being attracted.
4. circuit-breaker as claimed in claim 3, is characterized in that,
Aforementioned movable core except the aforementioned separating distance A that is attracted part portion and the part except aforementioned magnetic pole of aforementioned fixed iron core, with the aforementioned portion of being attracted of aforementioned movable core by the aforementioned magnitude relationship that is attracted the initial gap B between portion and aforementioned magnetic pole under the state of aforementioned poles attract is not, the aforementioned initial gap B of aforementioned separating distance A >.
5. circuit-breaker as claimed in claim 4, is characterized in that,
Aforementioned nonmagnetic axle has stage portion,
Aforementioned stage portion make aforementioned movable core except aforementioned part portion and the part except aforementioned magnetic pole of aforementioned fixed iron core of being attracted, keep along the state of the bearing of trend separation of this axle.
6. the circuit-breaker as described in any one in claim 1 to 5, is characterized in that,
Abutting part place at aforementioned movable core and aforementioned fixed iron core arranges magnetic resistance forming unit, thereby increases the magnetic resistance with respect to the leakage flux of aforementioned abutting part office.
7. a circuit-breaker, the fixed iron core of the magnetic movable core of its tool and magnetic, this fixed iron core have with the portion that is attracted of this movable core over against magnetic pole, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the aforementioned portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off
It is characterized in that,
The support structure portion that supports aforementioned movable core has free to rotately: axle, and it is formed on aforementioned movable core; And axle maintaining part, it is arranged on aforementioned fixed iron core, keeps aforementioned axis,
The fixed iron core of aforementioned magnetic has the pair of sidewalls portion being separated from each other integratedly, in aforementioned pair of sidewalls portion, form on separately with the portion that is attracted of aforementioned movable core over against magnetic pole,
Magnetic resistance structure is set in this support structure portion, and it becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core.
8. circuit-breaker as claimed in claim 7, is characterized in that,
Aforementioned axis is the axle of magnetic,
Between aforementioned axis maintaining part and aforementioned magnetic pole, spatial portion is set, this spatial portion becomes the magnetic resistance of the leakage flux producing from the part except aforementioned magnetic pole of aforementioned fixed iron core.
9. circuit-breaker as claimed in claim 8, is characterized in that,
Aforementioned fixed iron core has the pair of sidewalls portion being separated from each other and the bridge shape connecting portion that this pair of sidewalls portion is connected with bridge shape,
Aforementioned each side wall portion, form respectively aforementioned magnetic pole with on the end face contrary side of aforementioned bridge shape connecting portion,
On a side wall portion in aforementioned pair of sidewalls portion, have: a pair of axle maintaining part, it is positioned at the position corresponding with aforementioned pair of sidewalls portion; And wrist, it connects this pair of axle maintaining part with bridge shape,
Between another side wall portion in aforementioned pair of sidewalls portion and the aforementioned axis maintaining part corresponding with this another side wall portion, form aforesaid space portion.
10. circuit-breaker as claimed in claim 8, is characterized in that,
The space length C of aforesaid space portion and the aforementioned portion of being attracted of aforementioned movable core by the aforementioned magnitude relationship that is attracted the initial gap B between portion and aforementioned magnetic pole under the state of aforementioned poles attract be not, the aforementioned initial gap B of aforesaid space distance C >.
11. circuit-breakers as claimed in claim 9, is characterized in that,
The space length C of aforesaid space portion, with the aforementioned portion of being attracted of aforementioned movable core by the aforementioned magnitude relationship that is attracted the initial gap B between portion and aforementioned magnetic pole under the state of aforementioned poles attract is not, the aforementioned initial gap B of aforesaid space distance C >.
12. 1 kinds of circuit-breakers, the fixed iron core of the magnetic movable core of its tool and magnetic, this fixed iron core have with the portion that is attracted of this movable core over against magnetic pole, by utilizing the magnetic attraction producing each other in aforementioned magnetic pole and the aforementioned portion of being attracted, the action that aforementioned movable core is attracted by aforementioned fixed iron core, automatically cut off
It is characterized in that,
The fixed iron core of aforementioned magnetic has the pair of sidewalls portion being separated from each other integratedly, in aforementioned pair of sidewalls portion, form on separately with the portion that is attracted of aforementioned movable core over against magnetic pole,
The support structure portion that supports aforementioned movable core has free to rotately: nonmagnetic axle, and it is arranged on aforementioned movable core integratedly; And axle maintaining part, it is separately positioned in aforementioned pair of sidewalls portion, keeps aforementioned axis, and the aforementioned nonmagnetic axle of this support structure portion becomes from the magnetic resistance of the leakage flux of the part generation except aforementioned magnetic pole of aforementioned fixed iron core.
13. circuit-breakers as claimed in claim 12, is characterized in that,
The part except aforementioned magnetic pole of aforementioned movable core and aforementioned movable core except the aforementioned part being attracted portion, separate the aforementioned portion of the being attracted separation not by the interval of the initial gap under the state of aforementioned poles attract that is greater than aforementioned movable core.
14. circuit-breakers as described in any one in claim 7 to 13, is characterized in that,
Magnetic resistance forming unit is set on the abutting part of aforementioned movable core and aforementioned fixed iron core, thereby increases the magnetic resistance with respect to the leakage flux of aforementioned abutting part office.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-286582 | 2008-11-07 | ||
| JP2008286582 | 2008-11-07 | ||
| JP2009230569A JP5405971B2 (en) | 2008-11-07 | 2009-10-02 | Circuit breaker |
| JP2009-230569 | 2009-10-02 |
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| Publication Number | Publication Date |
|---|---|
| CN101740276A CN101740276A (en) | 2010-06-16 |
| CN101740276B true CN101740276B (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910211412.9A Active CN101740276B (en) | 2008-11-07 | 2009-11-06 | Circuit breaker |
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| JP (1) | JP5405971B2 (en) |
| CN (1) | CN101740276B (en) |
Families Citing this family (9)
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|---|---|---|---|---|
| JP5595225B2 (en) * | 2010-10-29 | 2014-09-24 | 三菱電機株式会社 | Circuit breaker |
| JP5676782B2 (en) * | 2012-01-06 | 2015-02-25 | 三菱電機株式会社 | Circuit breaker |
| JP6262570B2 (en) * | 2014-03-04 | 2018-01-17 | 河村電器産業株式会社 | Circuit breaker electromagnetic trip device |
| JP6334956B2 (en) * | 2014-03-04 | 2018-05-30 | 河村電器産業株式会社 | Circuit breaker electromagnetic trip device |
| KR101866222B1 (en) * | 2016-05-12 | 2018-06-15 | 변창규 | Overload protection device for earth leakage breaker and wiring breaker |
| CN108615661B (en) * | 2016-12-13 | 2024-03-15 | 上海良信电器股份有限公司 | Reset bending plate of magnetic flux converter of circuit breaker |
| WO2019181532A1 (en) * | 2018-03-23 | 2019-09-26 | 三菱電機株式会社 | Tripping device |
| KR102271519B1 (en) * | 2019-11-18 | 2021-07-01 | 엘에스일렉트릭(주) | Crossbar assembly and trip assembly include the same |
| JP2023091166A (en) * | 2021-12-20 | 2023-06-30 | パナソニックホールディングス株式会社 | Electromagnetic trip device, circuit breaker, and distribution board |
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| CN101147224A (en) * | 2005-03-25 | 2008-03-19 | 三菱电机株式会社 | Circuit breaker and thermal trip |
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| JP2010135306A (en) | 2010-06-17 |
| JP5405971B2 (en) | 2014-02-05 |
| CN101740276A (en) | 2010-06-16 |
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