CN101055821A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN101055821A CN101055821A CNA2007100963589A CN200710096358A CN101055821A CN 101055821 A CN101055821 A CN 101055821A CN A2007100963589 A CNA2007100963589 A CN A2007100963589A CN 200710096358 A CN200710096358 A CN 200710096358A CN 101055821 A CN101055821 A CN 101055821A
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- Prior art keywords
- contact
- lock pin
- connecting rod
- toggle link
- circuit
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
- H01H23/02—Details
- H01H23/12—Movable parts; Contacts mounted thereon
- H01H23/14—Tumblers
- H01H23/146—Tumblers having a generally tubular or conical elongated shape, e.g. dolly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
- H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
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Abstract
The invention provides an open/closing mechanism of the circuit breaker, including handspike connected to the operating handle; a lockpin whose terminal shaft is supported on the pivot shaft and locked to the lockpin bearing part; toggle link formed by top connecting bar and lower connecting bar through toggle link bar, whose another terminal pivot of respective connecting bar is supported on the lockpin and contact element fixer; and switch spring between the toggle link pin and handspike set by drawing frame for opening and closing the main circuit connection point by the OM/OFF switch of the handle and releasing connecting bar by the excess current detection to make the open/closing mechanism process tripping action, in which the connecting shaft on the lockpin is enbeded into the top terminal of the top connecting bar to form a U-shaped open bearing part which is able to sliably pivoted joint. The tripping action among the fixing/moving connection points in the molten state is not interrupted by the top connecting bar and making the recovery elasticity of the switch spring directly act on the toggle link pin so as to enhance the leaving force of the molten connecting point and improve the reliability of the breaking action.
Description
Technical field
The present invention relates to Inturruptor for sub-line, residual current circuit breaker etc. is the circuit-breaker of object, particularly, the present invention relates to the structure of circuit-breaker switching mechanism.
Background technology
In the foregoing circuit circuit breaker, at the main circuit contact is under the "on" position of closure, if because of abnormal pulsers electric current etc. causes becoming between fixed contact and the travelling contact molten condition, even overcurrent release device (overcurrent tripping device) operate as normal then, the main circuit contact also can discharge the lock pin (latch) of locking mechanism under closure state, make operating handle move to TRIP from the ON position and represent the position and stop.
In this case, if can be under the contact molten condition with the handle move operation to the OFF position, the main circuit contact that then can think circuit-breaker by mistake is an off-state, if under this state, carry out the maintenance of load side electrical circuitry and maintenance etc., the then danger that might get an electric shock because of the electric wire of contact electrification of staff.
Therefore, as the Security Countermeasures of the problems referred to above, disclosing in the prior art has following circuit-breaker, promptly, this circuit circuiting appliance has the isolation features of the variety of way of mechanical caging, makes in energising can to stop handle moving to the OFF position under the situation that the contact fusion takes place.As the one example, known have a following circuit-breaker, its switching mechanism is provided with stop mechanism etc., make that handle can not move to the OFF position under the state of contact fusion, simultaneously, in switching mechanism, also append to be provided with and leave parts, at contact is under the situation of slight molten condition, operation by handle discharges lock pin, forcibly make switching mechanism dropout (trip) with this, and utilize by this dropouts and move the elastic force of the switch spring that discharged, make the fusion between this contact peel off (with reference to patent documentation 1).
Then, in Fig. 8～Figure 11, express the structure and the exercises mode thereof of the circuit-breaker that patent documentation 1 disclosed.In each figure, label 1 is represented the body housing (case) of circuit breaker, label 2 is represented the fixed contact therefor of main circuit, label 2a represents fixed contact, label 3 representatives remain on the movable contact on the rotary contact fixture 4, label 3a represents travelling contact, label 5 is represented the extinguishing arc grid, label 6 representatives are connected the switching mechanism on the contact fixture 4, label 7 is represented operating handle, and not shown body housing 1 is provided with the overcurrent that is used to detect main circuit, and give the thermal type that switching mechanism 6 threads off instruction or the overcurrent release device of electromagnetic type.
Herein, switching mechanism 6 is by the assembly that constitutes with lower member, that is, as shown in Figure 9, described parts comprise: front end (illustrated lower end side) pivotal support is on framework 6a and the handle rod member (handle lever) 8 that combines with operating handle 7 of upper end; One end pivoting is supported on the fulcrum 9 and the claw card of the other end ends the lock pin that shakes rod-type 11 on lock pin bearing part 10; By toggle link pin 14 on the connection basis, pivotal support and link are located at toggle link (togglelinkage) on lock pin 11, the contact fixture 4 to last connecting rod 12 respectively by fulcrum pin 15,16 respectively with lower link 13 other end separately between last connecting rod 12 and lower link 13; And draw frame is located at the switch spring (extension spring) 17 between the upper end of described toggle link pin 14 and handle rod member 8.Wherein, label 18 representative is connected the dropout door bolt (trip crossbar) on the lock pin bearing part 10, the crimp spring of label 19 representatives on the fixed contact 2a that on the make position travelling contact 3a of movable contact 3 is pressed to fixed contact therefor 2.
In addition, as with the corresponding retaining device of above-mentioned isolation features, lateral margin at last connecting rod 12 is formed with convex cam 12a, relatively is provided with the locking plate 8a that front end bends to Japanese ideogram " ㄑ " font in the ON of handle rod member 8 side (illustrated left side) with this convex cam 12a.And, as the above-mentioned parts that leave, switching mechanism 6 be provided with an end pivoting be supported on the toggle link pin 14 and front end and the locking plate 8a of thread off door bolt 18 and handle rod member 8 stand facing each other mutually be " Y " font leave plate 20, come to apply anticlockwise active force by the line of torsion coil spring on the axle that is arranged on the toggle link pin to leaving plate 20.
As in the patent documentation 1 in detail as described in, for the switch of the circuit-breaker of said structure and the action of threading off, swing at operating handle 7 under the on-state of ON position (with reference to Fig. 8), receive last connecting rod 12 (fulcrum pin 15 of upper end side becomes fixing point) and the lower link 13 linearly extensions substantially of toggle link of the elastic force of switch spring 17, contact fixture 4 is depressed to counter clockwise direction, the contact 3a of movable contact 3 contacts the main circuit junction closure with the top of contact 2a of fixed contact therefor 2.As operating handle 7 when this state is swung to the OFF position (with reference to Fig. 9), the elastic force position of switch spring 17 surpasses dead point (dead point, the fulcrum pin 15 of last connecting rod 12) and reverses.Thus, the last connecting rod 12 and the lower link 13 of elbow-bar mechanism bend to down Japanese ideogram " ㄑ " font, and contact fixture 4 rotates to clockwise direction, and movable contact 3 leaves and moves from fixed contact therefor 2, and the main circuit contact disconnects.
In addition, Figure 10 represents is that to make the main circuit contact by the action of threading off be off-state, in main circuit, flow through overcurrent and make overcurrent release device (not shown) action if under the ON of Fig. 8 state, detect, then its machinery output arrives the door bolt 18 of threading off, and the card that lock pin bearing part 10 discharges lock pin 11 ends.Thus, making lock pin 11 by the elastic force of switch spring 17 is fulcrum to counterclockwise rotating with fulcrum 9, and is driven in this and rotates counterclockwise, and the fulcrum pin 15 that is connected the last connecting rod 12 on the lock pin 11 moves to the position of Figure 10.Its result, the lower link 13 that is connected with toggle link pin 14 by last connecting rod 12 lifts upward, and contact fixture 4 rotates to clockwise direction, thereby movable contact 3 is disconnected.Wherein, under this dropout operate condition, operating handle 7 stops at illustrated dropout and represents position (between ON position and the OFF position), and in addition, the upper end fulcrum 15 that is connected the last connecting rod 12 on the lock pin 11 moves to shown position.When this dropout operate condition is connected circuit-breaker again, operating handle 7 is swung to OFF position (with reference to Fig. 9) from the TRIP position, after (the setting again) lock pin 11 of resetting, swings to ON position (with reference to Fig. 8) and change into.
On the other hand, under the state of main circuit contact generation fusion, when operating handle 7 from the ON position to the OFF position move, circuit-breaker being carried out OFF when operation, as shown in figure 11, moving midway of operating handle 7, plate 20 is left in the locking plate 8a of handle rod member 8 pushing.Therefore, leaving plate 20 is that fulcrum tilts to rotate to clockwise direction with toggle link pin 14, and the front end pushing lock pin bearing part 10 of plate is to discharge the combination of lock pin 11.Thus, utilization is set up in the elastic force (tensile-elasticity) of the switch spring 17 between handle rod member 8 and the toggle link pin 14, applying with fulcrum 9 to lock pin 11 is fulcrum, in the counterclockwise direction revolving force, and interlock therewith applies by 13 pairs of contact fixtures 4 of lower link and to leave power F.Owing to this leaves power F is that so if contact is slight fusion, then the fusion meeting is peeled off, movable contact 3 can disconnect, and moves to the dropout operate condition of Figure 10 along the direction effect that movable contact 3 is left from fixed contact therefor 2.
Wherein, even under the situation that the contact molten condition seriously can not be peeled off by above-mentioned handle operation, as shown in figure 11, the locking plate 8a of handle rod member 8 engages with the convex cam 12a of last connecting rod 12, stop operating handle 7 from illustrated position to be moved further (isolation features) of OFF position.
Patent documentation 1: TOHKEMY 2000-323003 communique (the 4th～7 page, Fig. 1～Fig. 6)
Yet, above-mentioned existing switching mechanism (patent documentation 1), aspect such as the power of leaving of peeling off at the contact that makes fusion and the number of parts, assembling has following problem.
Promptly, for molten condition is peeled off in the operation by handle under the state of contact fusion, moving midway of operating handle 7, the parts that leave as the lock pin that is used to discharge locking mechanism, must be provided with and illustratedly leave plate 20 and this leaves the force application spring (line of torsion coil spring) of plate 20, so the part count of switching mechanism and assembling procedure increase, cost up.
In addition, under the state of contact fusion, the operation that utilizes handle by described action when leaving parts and discharging the lock pin of locking mechanism to movable contact effect to leave power little, can make the situation that the fusion between contact is peeled off only limit to extremely slight molten condition.
Promptly, as shown in figure 11, under the state of contact fusion by operating handle 7 to the move operation of OFF direction via leaving under the state of plate 20 after discharging lock pin 11, the position of toggle link is moved from closure state shown in Figure 8 hardly, and fixedly connected with lock pin 11 by fulcrum pin 15 in the upper end of last connecting rod 12, can not freely turn to off-position (with reference to Figure 10) so lock pin 11 is subjected to connecting rod 12 with the constraint of lower link 13.
Therefore, in order the contact fusion to be peeled off, as described below power is left in movable contact 3 effects.Promptly, under the state after lock pin shown in Figure 11 just discharges, utilize the elastic force of switch spring 17, it is that fulcrum is to the counter clockwise direction rotating moment that last connecting rod 12 is applied with fulcrum 15, this turning moment is delivered to contact fixture 4 by lower link 13, plays the effect of the power of the leaving F of movable contact 3.
But, as the position of toggle link among Figure 11 as can be known, the upper end of last connecting rod 12 is connected the axis that fulcrum 15 on the lock pin 11 and toggle link pin 14 are formed, and the angle between the elastic force position of switch spring 17 is less acute angle.Therefore, if with the elastic force of switch spring 17 be divided into along the vector composition on the axis direction of last connecting rod 12, with make connecting rod 12 to the vector composition (rotating vector) that counterclockwise rotates, then the major part of the elastic force of switch spring 17 is along the vector composition on the axis direction of last connecting rod 12, and the turning moment that acts on connecting rod 12 becomes very little.That is it is very low, the elastic force of switch spring 17 to be transformed to the efficient of turning moment of connecting rod 12.Therefore, the fusion of opposing contact, the power of the leaving F that movable contact 3 is lifted is also little, except that molten condition is extremely slight state, is difficult to be peeled off by the release movement of lock pin 11 fusion of contact.
And, described contact departure motion only is the function that discharges the state of lock pin by the manual operation of handle artificially, under the "on" position that produces the contact fusion, discharge under the situation of lock pin by the dropout action of overcurrent release device, though start working by the pressure opening operation of the handle after the action of threading off, in this case, as mentioned above, because it is very low that the elastic force of switch spring is transformed to the efficient of turning moment of connecting rod, so can not be left power fully.
Summary of the invention
The present invention proposes in view of the above problems, its purpose is to address the above problem, a kind of new parts that do not increase are provided, by the last connecting rod of improvement toggle link and the structure of the pivotal support connecting portion between the lock pin, when having the dropout action that can strengthen under the contact molten condition, act on the power of leaving on the movable contact, thereby can improve the circuit-breaker with isolation features of the reliability that disconnects action.
To achieve these goals, according to the present invention, a kind of circuit-breaker is provided, it is characterized in that, comprise: the fixed contact therefor of main circuit and remain on the movable contact on the rotary contact fixture and be connected switching mechanism, operating handle and overcurrent release device on the contact fixture, wherein, the assembly that described switching mechanism is made up of following parts constitutes, wherein, the parts of forming described assembly comprise: the front end pivotal support is on framework and the handle rod member that combines with operating handle; Thereby an end axle is supported on the framework and the front end claw blocks all the time only blocked the lock pin that only remains on latched position on the lock pin bearing part; Constitute by the last connecting rod and the lower link that interosculate by the toggle link pin, and connecting rod and the lower link other end separately pivotal support and link is located at the toggle link on lock pin and the contact fixture respectively on it; And draw frame is located at the switching spring between the upper end of described toggle link pin and handle rod member, wherein, described circuit-breaker utilizes the ON/OFF operation of handle and opens and closes the main circuit contact, and, when flowing through, overcurrent discharges described lock pin, the action so that switching mechanism is threaded off is in such circuit-breaker
Between the last connecting rod of toggle link and the lock pin slidably pivotal support be connected, make between fixed contact and travelling contact, to produce when threading off action under the contact molten condition that lock pin is not subjected to about beam interferometer of connecting rod and can rotates to off-position (first aspect).Particularly, upper end at last connecting rod is formed with the opening bearing portion (second aspect) of " U " font, perhaps be formed with the bearing portion (third aspect) of slotted hole type, in " U " of this bearing portion font ditch or slotted hole, embed and be combined with the connection axial region that is arranged on the lock pin, and should connect axial region slidably pivotal support connect lock pin and last connecting rod each other.
And, under the situation that movable contact is disconnected, make handle move to the separating mechanism of OFF position as stoping by the manual operation handle, on the lateral margin of last connecting rod, be formed with the convex cam, simultaneously, relatively be provided with the locking plate (fourth aspect) of arm shape in the ON of handle rod member side with this convex cam.
According to said structure, can be when the dropout under carrying out the contact molten condition be moved, make the back stretch of switch spring be effective as the power of leaving of movable contact.
Promptly, discharging under the state of lock pin by threading off action, though the lower link that is connected in the toggle link of movable contact by the contact fixture is subjected to the constraint of contact fusion and can not freely moves, and goes up connecting rod and can freely shake around the toggle link pin.Thus, put on the elastic force of the switch spring (switch spring is set up between toggle link pin and the handle rod member) of toggle link pin, can be by last connecting rod to lock pin effect turning moment, lock pin is accepted this turning moment and is rotated to the off-position.In this case, because last connecting rod is connected in lower link by the toggle link pin, so can not follow the action of lock pin, but, owing to freely slide in " U " type groove of the bearing portion that the connecting axle that is provided with on the lock pin can form in the upper end of last connecting rod or the slotted hole, so can mutual restriction between lock pin and the last connecting rod.Thus, the back stretch of switch spring can make the lower link that is connected in the toggle link pin directly lift, and plays the effect of the power of leaving of the fusion of peeling off between contact.That is, the back stretch of switch spring is not the turning moment that is transformed to connecting rod as existing structure, and back stretch is the power of leaving of the movable contact of conduct completely effectively.
So, even the molten condition between fixing/travelling contact has some increasing the weight of, also can peel off fusion, movable contact is disconnected, improve the reliability of the action of opening circuit.
And, on the basis of said structure, can also be by on the lateral margin of last connecting rod, forming the convex cam, simultaneously with this convex cam relatively again the ON side of handle rod member the locking plate of arm shape is set, thus, the power of leaving serious in the contact molten condition, by described dropout action can not make under the situation that the fusion of contact peels off, even operating handle desires to move to the OFF position, be arranged at locking plate on the handle rod member contact with the convex cam of last connecting rod (conflict) midway what move, stop being moved further of handle, guarantee isolation features.
Description of drawings
Fig. 1 is the structure chart of the circuit-breaker of the embodiment of the invention, (a) is all cut-away views of circuit-breaker, (b) is the stereogram of package assembly of the last connecting rod of the lock pin of the switching mechanism of expression in (a) and toggle link.
Fig. 2 is the exploded perspective view of Fig. 1 (b).
Fig. 3 is the end view of the ON operate condition of switching mechanism in the presentation graphs 1.
Fig. 4 is the end view of the OFF operate condition of expression switching mechanism.
Fig. 5 is the end view of the dropout operate condition of expression switching mechanism.
Fig. 6 is the end view of the dropout operate condition of the switching mechanism under the expression contact molten condition.
Fig. 7 is the Action Specification figure of switch spring in dropout when action of Fig. 6.
Fig. 8 is the structure chart of the circuit-breaker shown in the patent documentation 1 under the ON operate condition.
Fig. 9 is the end view of the OFF operate condition of switching mechanism in the presentation graphs 8.
Figure 10 is the end view of the dropout operate condition of switching mechanism in the presentation graphs 8.
Figure 11 is the figure of the dropout operate condition under the contact molten condition in the circuit-breaker of presentation graphs 8.
Label declaration:
2: fixed contact therefor; 3: movable contact; 4: the contact fixture; 6: switching mechanism; 6a: framework; 7: operating handle; 8: the handle rod member; 8a: locking plate; 9: the fulcrum of lock pin; 11: lock pin; 12: the last connecting rod of toggle link; 12a: convex cam; 12b: opening bearing portion; 13: lower link; 14: the toggle link pin; 17: switch spring.
Embodiment
Below, based on Fig. 1～embodiment shown in Figure 7 embodiments of the present invention are elaborated.Wherein, in the figure of embodiment, to the identical label of the corresponding parts of Fig. 8～Figure 11 mark, and omit its explanation.
At first, Fig. 1 (a) is all cut-away views of indication circuit circuit breaker, and Fig. 1 (b) and Fig. 2 are the pivotal support structures between the last connecting rod of expression lock pin of switching mechanism and toggle link.Promptly, switching mechanism in the circuit-breaker of illustrated embodiment, basic identical with the structure of patent documentation 1 shown in Figure 8, but, as the mechanism that realizes separation function, be provided with the locking plate 8a that front end bends to Japanese ideogram " ㄑ " font in the ON of handle rod member 8 side (illustrated left side), and, relatively be formed with convex cam 12a (with reference to Fig. 1 (b)) with this locking plate 8a at the lateral margin of last connecting rod 12.
In addition, for the pivotal support syndeton between lock pin 11 and the last connecting rod 12, in illustrated embodiment, as shown in Figure 2, on lock pin 11, be formed with connecting axle 11a, relatively be provided with the guide part of linearity with this connecting axle 11a in the upper end of last connecting rod 12, direction of principal axis formation breach along connecting rod is the opening bearing 12b of portion of " U " font, assembling position at switching mechanism 6, the connecting axle 11a of lock pin embedded be combined among this style of opening bearing 12b of portion, make to be free to slide the ground pivotal support and to connect lock pin 11 and last connecting rod 12 each other.Wherein, as hereinafter described, the degree of depth of " U " font groove of the 12b of bearing portion is set at: even rotate at lock pin 11 under the state of off-position, connecting axle 11a can not leave " U " font groove yet.
ON (closure), the OFF (disconnection), TRIP (dropout) action that utilize said structure to carry out are identical with the circuit-breaker of prior art, swing at operating handle 7 under the on-state of ON position, as shown in Figure 3, the last connecting rod 12 of toggle link and lower link 13 linearly extensions substantially, make contact fixture 4 to rotation counterclockwise, thereby the contact 3a of movable contact 3 contacts the main circuit junction closure with fixed contact therefor 2.In addition, as operating handle 7 when this state is swung to the OFF position (with reference to Fig. 4), the elastic force position of switch spring 17 surpasses the dead point and reverses, thus, the last connecting rod 12 and the lower link 13 of elbow-bar mechanism bend to down Japanese ideogram " ㄑ " font, make contact fixture 4 rotate to clockwise direction, movable contact 3 is moved upward from fixed contact therefor 2, and the main circuit contact disconnects.
In addition, under the on-state of Fig. 3, flow through overcurrent and overcurrent release device (not shown) when action in detecting main circuit, its machinery output arrives the door bolt 18 of threading off, and lock pin bearing part 10 discharges lock pins 11.Thus, making lock pin 11 by the back stretch that is erected at the switch spring 17 between handle rod member 8 and the toggle link pin 14 is that fulcrum is to counterclockwise rotating with fulcrum 9, follow this action, the connecting axle 11a that is arranged on the lock pin 11 moves to the left side of the position of switch spring 17.Its result receives the back stretch of switch spring 17, and connecting rod 12 bends to down Japanese ideogram " ㄑ " font with lower link 13, interlock therewith, and contact fixture 4 rotates to clockwise direction, movable contact 3 disconnections.
Then, based on Fig. 6, Fig. 7, describe move the separately action of the fusion of peeling off contact by the dropout under the main circuit contact molten condition.As shown in Figure 6, if under the state of the contact of fixed contact therefor 2 and the mutual fusion of contact of movable contact 3, carry out the action of threading off, then discharge lock pin 11.Yet, under the state that this lock pin discharges, although the lower link 13 that is connected the toggle link on the movable contact 3 by contact fixture 4 is subjected to the constraint of contact fusion and can not moves freely,, last connecting rod 12 can shaking at toggle link pin 14 on every side.Thus, utilization is applied to the back stretch of the switch spring 17 on the toggle link pin 14, and can produce anticlockwise turning moment by 12 pairs of lock pins of last connecting rod 11, it is that fulcrum rotates to off-position (position of Fig. 4) with fulcrum 9 that connecting rod 11 is accepted this turning moment.
In this case, because the connecting axle 11a that is arranged on the lock pin 11 can be free to slide " U " the font groove that the ground pivotal support is connected in the opening bearing 12b of portion that forms in the upper end of connecting rod 12 along guide part, so, lock pin 11 can not be subjected to the constraint of connecting rod 12 and be that fulcrum rotates with fulcrum 9, and, along with the rotation of this lock pin 11, as shown in Figure 7, last connecting rod 12 can shake to counter clockwise direction around toggle link pin 14.Consequently, rotary motion trace by connecting axle 11a and the rotary motion trace of the 12b of bearing portion poor, make such as shown in the figure, generation play gap g between connecting axle 11a and the 12b of bearing portion.
Therefore, the back stretch f of switch spring 17 is not subjected to the restriction of connecting rod 12, lock pin 11, and the lower link 13 that is connected on the toggle link pin 14 is directly lifted, and plays the effect of the power of the leaving f of the fusion of peeling off between fixing/travelling contact.That is, the back stretch of switch spring 17 is not the turning moment that is transformed to connecting rod 12 as existing structure (with reference to Figure 11), make elastic force can be completely effectively as the power of leaving of movable contact 3.
So no matter how serious the molten condition between fixing/travelling contact have, the back stretch by switch spring 17 also can peel off fusion, so that movable contact 3 disconnects, improves the reliability of the action of opening circuit.
And, more serious in the contact molten condition, can not make under the situation of travelling contact 3 disconnections by the power of the leaving F that works in the described dropout action, even desire moves to the OFF position with operating handle 7 from this position, moving midway, be arranged at locking plate 8a and formed convex cam 12a on the lateral margin of last connecting rod 12 on the handle rod member 8 joint that conflicts mutually, stop operating handle 7 to be moved further.Thus, can guarantee the isolation features of circuit-breaker.
Wherein, in the illustrated embodiment, be the opening bearing 12b of portion that forms " U " font in the upper end of last connecting rod 12, with the connecting axle 11a of lock pin 11 slidably pivotal support be connected, but, also can form the bearing portion of long hole shape in the upper end of last connecting rod 12 along the pitman shaft direction, replacing the opening bearing 12b of portion of " U " font, this slotted hole be embedded in lock pin 11 connecting axle 11a and slidably pivotal support connect.Wherein, consider the installation of switching mechanism in this structure, connecting axle 11a separates with lock pin 11, under the state on embedding in the slotted hole of connecting rod 12, is fixed in lock pin 11.
Claims (4)
1. a circuit-breaker is characterized in that, comprising:
The fixed contact therefor of main circuit and remain on the movable contact on the rotary contact fixture and be connected switching mechanism, operating handle and overcurrent release device on the contact fixture, wherein,
The assembly that described switching mechanism is made up of following parts constitutes, and wherein, the parts of forming described assembly comprise:
The front end pivotal support is on framework and the handle rod member that combines with operating handle;
Thereby an end axle is supported on the framework and the front end claw blocks all the time only blocked the lock pin that only remains on latched position on the lock pin bearing part;
Constitute by the last connecting rod and the lower link that interosculate by the toggle link pin, and connecting rod and the lower link other end separately pivotal support and link is located at the toggle link on lock pin and the contact fixture respectively on it; And
Draw frame is located at the switching spring between the upper end of described toggle link pin and handle rod member, wherein,
Described circuit-breaker utilizes the ON/OFF operation of handle and opens and closes the main circuit contact, and, when flowing through, overcurrent discharges described lock pin, the action so that switching mechanism is threaded off, and in this circuit-breaker,
Between the last connecting rod of toggle link and the lock pin slidably pivotal support be connected, make between fixed contact and travelling contact, to produce when threading off action under the contact molten condition that lock pin is not subjected to about beam interferometer of connecting rod and can rotates to the off-position.
2. circuit-breaker according to claim 1 is characterized in that:
Upper end at last connecting rod is formed with the opening bearing portion of " U " font, in this bearing portion, embed and be combined with the connection axial region that is arranged on the lock pin, and should connect axial region slidably pivotal support connect lock pin and last connecting rod each other.
3. circuit-breaker according to claim 1 is characterized in that:
Be formed with the bearing portion of slotted hole type in the upper end of last connecting rod, in the slotted hole of this bearing portion, embed and be combined with the connection axial region that is arranged on the lock pin, and should connect axial region slidably pivotal support connect lock pin and last connecting rod each other.
4. according to each described circuit-breaker in the claim 1～3, it is characterized in that:
As being to stop operating handle to move to the separating mechanism of OFF position under the molten condition when the main circuit contact, on the lateral margin of last connecting rod, be formed with the convex cam, simultaneously, relatively be provided with the locking plate of arm shape in the ON of handle rod member side with this convex cam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006112223 | 2006-04-14 | ||
| JP2006112223A JP4857881B2 (en) | 2006-04-14 | 2006-04-14 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101055821A true CN101055821A (en) | 2007-10-17 |
| CN100555505C CN100555505C (en) | 2009-10-28 |
Family
ID=38514833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100963589A Active CN100555505C (en) | 2006-04-14 | 2007-04-13 | Circuit-breaker |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4857881B2 (en) |
| KR (1) | KR100858590B1 (en) |
| CN (1) | CN100555505C (en) |
| DE (1) | DE102007015190A1 (en) |
| FR (1) | FR2899996B1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102265371A (en) * | 2009-01-08 | 2011-11-30 | Abb股份公司 | A control mechanism for a circuit-breaking device and a circuit-breaking device comprising said mechanism |
| CN101552159B (en) * | 2008-03-31 | 2013-05-08 | 三菱电机株式会社 | Circuit breaker |
| CN103367068A (en) * | 2012-04-05 | 2013-10-23 | 富士电机机器制御株式会社 | Circuit breaker |
| CN103797558A (en) * | 2011-12-16 | 2014-05-14 | 现代重工业株式会社 | Trip device and circuit breaker for electric wiring having same |
| CN104347322A (en) * | 2013-08-06 | 2015-02-11 | 富士电机机器制御株式会社 | Circuit breaker |
| CN104599913B (en) * | 2015-01-21 | 2016-08-24 | 温州高能电气有限公司 | A kind of RCCB |
| CN112713014A (en) * | 2020-12-16 | 2021-04-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rotary roller contact structure |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100909425B1 (en) * | 2007-08-10 | 2009-07-24 | 엘에스산전 주식회사 | Circuit breaker with trip position indicator |
| KR100914203B1 (en) * | 2007-08-10 | 2009-08-27 | 엘에스산전 주식회사 | Mold cased circuit breaker with a contact on mechanism |
| FR2939238B1 (en) * | 2008-11-28 | 2011-01-14 | Hager Electro Sas | JOINT MECHANISM FOR ELECTRIC CLAMP OF LINE BREAKER TYPE OF CIRCUIT BREAKER TYPE. |
| KR101015316B1 (en) * | 2008-12-31 | 2011-02-15 | 엘에스산전 주식회사 | Switching mechanism capable of indicating contacts status and mold cased circuit breaker having the same mechanism |
| KR101019030B1 (en) | 2009-03-11 | 2011-03-04 | 엘에스산전 주식회사 | Circuit braeker with rebound preventor |
| JP5595827B2 (en) * | 2010-08-06 | 2014-09-24 | 河村電器産業株式会社 | Circuit breaker |
| CN107546073B (en) * | 2016-06-23 | 2019-12-27 | 上海良信电器股份有限公司 | Improved structure of operating mechanism for miniature circuit breaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07302534A (en) * | 1994-05-10 | 1995-11-14 | Fuji Electric Co Ltd | Opening and closing mechanism of circuit breaker |
| JP3814671B2 (en) * | 1996-03-15 | 2006-08-30 | 三菱電機株式会社 | Circuit breaker |
| US6166344A (en) * | 1999-03-23 | 2000-12-26 | General Electric Company | Circuit breaker handle block |
| JP3794200B2 (en) * | 1999-05-10 | 2006-07-05 | 三菱電機株式会社 | Circuit breaker |
| US6222143B1 (en) * | 2000-02-18 | 2001-04-24 | Siemens Energy & Automation, Inc. | Positive off toggle mechanism |
-
2006
- 2006-04-14 JP JP2006112223A patent/JP4857881B2/en active Active
-
2007
- 2007-03-27 KR KR1020070029649A patent/KR100858590B1/en active IP Right Grant
- 2007-03-29 DE DE102007015190A patent/DE102007015190A1/en not_active Withdrawn
- 2007-04-06 FR FR0702529A patent/FR2899996B1/en not_active Expired - Fee Related
- 2007-04-13 CN CNB2007100963589A patent/CN100555505C/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552159B (en) * | 2008-03-31 | 2013-05-08 | 三菱电机株式会社 | Circuit breaker |
| CN102265371B (en) * | 2009-01-08 | 2015-02-11 | Abb股份公司 | A control mechanism for a circuit-breaking device and a circuit-breaking device comprising said mechanism |
| US9524843B2 (en) | 2009-01-08 | 2016-12-20 | Abb S.P.A. | Control mechanism for a circuit-breaking device and a circuit-breaking device comprising said mechanism |
| CN102265371A (en) * | 2009-01-08 | 2011-11-30 | Abb股份公司 | A control mechanism for a circuit-breaking device and a circuit-breaking device comprising said mechanism |
| US8937260B2 (en) | 2009-01-08 | 2015-01-20 | Abb S.P.A. | Control mechanism for a circuit-breaking device and a circuit-breaking device comprising said mechanism |
| CN103797558A (en) * | 2011-12-16 | 2014-05-14 | 现代重工业株式会社 | Trip device and circuit breaker for electric wiring having same |
| CN103797558B (en) * | 2011-12-16 | 2016-10-26 | 现代重工业株式会社 | Trip gear and there is the electric wire chopper of this trip gear |
| CN103367068B (en) * | 2012-04-05 | 2015-11-25 | 富士电机机器制御株式会社 | Circuit-breaker |
| CN103367068A (en) * | 2012-04-05 | 2013-10-23 | 富士电机机器制御株式会社 | Circuit breaker |
| CN104347322A (en) * | 2013-08-06 | 2015-02-11 | 富士电机机器制御株式会社 | Circuit breaker |
| CN104599913B (en) * | 2015-01-21 | 2016-08-24 | 温州高能电气有限公司 | A kind of RCCB |
| CN112713014A (en) * | 2020-12-16 | 2021-04-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rotary roller contact structure |
| CN112713014B (en) * | 2020-12-16 | 2022-06-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rotary roller contact structure |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100858590B1 (en) | 2008-09-17 |
| JP2007287431A (en) | 2007-11-01 |
| FR2899996A1 (en) | 2007-10-19 |
| JP4857881B2 (en) | 2012-01-18 |
| FR2899996B1 (en) | 2014-07-04 |
| DE102007015190A1 (en) | 2007-10-18 |
| KR20070102391A (en) | 2007-10-18 |
| CN100555505C (en) | 2009-10-28 |
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Owner name: FUJI ELECTRIC MACHINE SYSTEM CO., LTD. Free format text: FORMER OWNER: FUJI ELECTRIC ASSETS MANAGEMENT CO., LTD. Effective date: 20090515 |
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Address after: Saitama Prefecture, Japan Patentee after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Tokyo, Japan Patentee before: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. |
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