CN104241047A - Electromagnetic tripping device and breaker - Google Patents
Electromagnetic tripping device and breaker Download PDFInfo
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- CN104241047A CN104241047A CN201410252141.2A CN201410252141A CN104241047A CN 104241047 A CN104241047 A CN 104241047A CN 201410252141 A CN201410252141 A CN 201410252141A CN 104241047 A CN104241047 A CN 104241047A
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Abstract
Provided are an electromagnetic tripping device and a breaker. The electromagnetic tripping device (90) comprises a spiral spring (98). A first magnetic core (93) is inserted into the spiral spring (98). A second magnetic core (97) is pushed by the spiral spring to be away from the first magnetic core. The first magnetic core and the second magnetic core move to contact each other and move to keep away from each other through a pushing force generated by the spiral spring and an electromagnetic force generated by the first magnetic core. A pivoting magnetic core keeping member (96) is pushed by a pushing force of a driver connection rod (50). When the first magnetic core generates an electromagnetic force, the pivoting magnetic core keeping member (96) pivots in the direction where the first magnetic core and the second magnetic core approach each other. When the magnetic core keeping member (96) contacts or approach the driver connection rod (50) and the first magnetic core contacts the second magnetic core, a limitation section (99) resists the pushing force of the driver connection rod (50) and limits movement of the driver connection rod (50).
Description
Technical field
The present invention relates to electromagnetic tripping apparatus and circuit breaker.
Background technology
Circuit breaker, for when the circuit of connection power supply and load is at predetermined circuit state, carrys out interrupt circuit (such as, with reference to No. 2000-231869th, Japanese Patent Publication) by breaking-off contact.Such as, circuit breaker can be molded case circuit breaker, earth leakage breaker, overvoltage release, under-voltage circuit breaker etc.When the fault current caused by short circuit or overload being detected, molded case circuit breaker interrupt circuit.When electric leakage being detected, earth leakage breaker interrupt circuit.When the voltage of circuit becomes higher than predetermined upper voltage limit, overvoltage release interrupt circuit.When the voltage of circuit becomes lower than predetermined lower voltage limit, under-voltage circuit breaker interrupt circuit.Multifunctional breaker in conjunction with dissimilar circuit breaker is also known.
Typical circuit breaker comprise closed and disconnected contact switching mechanism, for manual closing and the bar of breaking-off contact and together with switching mechanism the electromagnetic tripping apparatus of breaking-off contact.
' disclosed in 869, circuit breaker comprises electromagnetic tripping apparatus.Connecting rod is given prominence to from the housing of electromagnetic tripping apparatus.Connecting rod is installed in the housing of the circuit breaker being connected to electromagnetic tripping apparatus.When producing false voltage, electromagnetic tripping apparatus makes connecting rod move and the interrupt mechanism of circuit breaker is threaded off.Electromagnetic tripping apparatus comprises electromagnetic unit.Electromagnetic unit comprise the solenoid that coiling coil is wound around, the first magnetic core extending through coil frame aperture, be attracted to when electric current flows through solenoid the magnetic pole of the first magnetic core the second magnetic core and the second magnetic core is promoted away from the helical spring of the magnetic pole of the first magnetic core.
When electric current is fed to solenoid, the first magnetic core magnetic attraction second magnetic core is to make magnetic core adjacent to each other.The present inventor has been noted that bending stress may cause the plastic deformation of electromagnetic tripping apparatus parts and such distortion may make the voltage characteristic of electromagnetic tripping apparatus unstable.
Summary of the invention
Target of the present invention is to provide the electromagnetic tripping apparatus and circuit breaker with stable voltage characteristic.
One aspect of the present invention is a kind of electromagnetic tripping apparatus, and it comprises helical spring.First magnetic core is inserted through helical spring.Second magnetic core by coil spring urges away from the first magnetic core.First magnetic core and the second magnetic core are configured so that the motive force that the first magnetic core and the second magnetic core are produced by helical spring and the electromagnetic force that the first magnetic core produces are moved into and contact with each other and move away from each other.Pivotable magnetic core retainer comprises base end part and distal portion.Base end part comprises pivot.Distal portion is promoted by the thrust of driver connecting rod.When the first magnetic core produces electromagnetic force, magnetic core retainer is in the first magnetic core and the second magnetic core approximating direction pivotable.When magnetic core retainer to contact with driver connecting rod or close to driver connecting rod and the first magnetic core contacts with the second magnetic core time, the thrust restriction driver connecting rod motion of restricted part opposing driver connecting rod.
One aspect of the present invention reduces the plastic deformation of magnetic core retainer and reduces the displacement of driver connecting rod from stop position, therefore obtains the electromagnetic tripping apparatus with burning voltage characteristic.
In some examples, restricted part is arranged to the distal portion away from magnetic core retainer pivot close.
In some examples, magnetic core retainer is by coil spring urges and move away from the direction pivotally pivotable of the first magnetic core at the second magnetic core.Magnetic core retainer comprises the contact surface of contact driver connecting rod.When contact surface contacts with driver connecting rod, this contact surface extends perpendicular to the direction of helical spring motive force.
In some examples, the contact of restricted part and driver connecting rod limits the mobile range of driver connecting rod.
In some examples, driver connecting rod is supported so that around its base end part pivotable.Driver connecting rod comprises distal portion, when driver connecting rod pivotable, and described distal portion contact restricted part.Driver connecting rod comprises the engagement tabs between the base end part and distal portion of driver connecting rod, the distal portion of wherein said engagement tabs contact magnetic core retainer.Described restricted part is stiffener, when the distal portion of the engagement tabs contact magnetic core retainer of driver connecting rod, and the distal portion of described stiffener contact driver connecting rod.
Another aspect of the present invention provides a kind of circuit breaker, and it comprises according to the one or more electromagnetic tripping apparatus in an above-mentioned aspect and example.
Described circuit breaker can comprise: bar, its supported in case between on-position and open position pivotable, wherein at described on-position, movable contact contact fixed contact, at described open position, movable contact moves away from fixed contact; And interrupt mechanism, it directly or is indirectly connected to described bar, wherein when described bar pivotable, described movable contact is moved away from fixed contact by described interrupt mechanism, wherein said electromagnetic tripping apparatus is configured to box lunch when predetermined circuit state being detected, and movable contact is moved away from fixed contact.
According to an embodiment, the breaker assembly of combination comprises the first circuit breaker and is connected to the second circuit breaker of the first circuit breaker, and the first circuit breaker is described according to circuit breaker on the other hand.
In some examples, each in described circuit breaker and described other circuit breaker comprises bar, and described circuit breaker is connected via connecting rod with the bar of described other circuit breaker.
From description taken together with the accompanying drawings below, other aspects and advantages of the present invention will become obvious, and wherein accompanying drawing by way of example principle of the present invention is shown.
Accompanying drawing explanation
The present invention and its target and advantage can be understood best by reference to the description of presently preferred embodiment below and accompanying drawing, in the accompanying drawings:
Fig. 1 is the exploded perspective view of circuit breaker;
Fig. 2 is the left view of circuit breaker in the off state;
Fig. 3 is the right view of circuit breaker in the off state;
Fig. 4 is the stereogram of electromagnetic tripping apparatus;
Fig. 5 is the exploded perspective view of electromagnetic tripping apparatus;
Fig. 6 is the end view of electromagnetic tripping apparatus;
Fig. 7 is the viewgraph of cross-section of electromagnetic tripping apparatus;
Fig. 8 is the viewgraph of cross-section of electromagnetic tripping apparatus;
Fig. 9 is the cross-sectional view of the electromagnetic tripping apparatus intercepted along the line 9-9 of Fig. 6;
Figure 10 is the left view of circuit breaker in an on state;
Figure 11 is the left view that the circuit breaker when undervoltage tripping occurs is shown;
Figure 12 is the left view of the circuit breaker illustrated under undervoltage tripping state;
Figure 13 is the schematic diagram of the contact that driver connecting rod and magnetic core retainer are shown; And
Figure 14 A and 14B shows the breaker assembly of combination, and it comprises the circuit breaker of Fig. 1 and other circuit breaker.
Embodiment
To describe electromagnetic tripping apparatus and comprise the embodiment of circuit breaker of electromagnetic tripping apparatus now.Circuit breaker can be under-voltage circuit breaker 1, and when the voltage of circuit becomes lower than predetermined lower voltage limit, described under-voltage circuit breaker is by Circuit Interrupt.Under-voltage circuit breaker can use together with the dissimilar circuit breaker molded case circuit breaker of interrupt circuit (such as when the fault current caused by short circuit or overload being detected).
As shown in Figure 1, under-voltage circuit breaker 1 can comprise housing 10, and it comprises the first lid 11 and the second lid 12.First lid 11 and the second lid 12 can be formed by insulating synthetic resin.The open end 12a that the open end 11a and second of the first lid 11 covers 12 is combined to be limited to the interior compartment in housing 10.
Fig. 1 comprises the orthogonal coordinate system in the direction of instruction under-voltage circuit breaker.Identical orthogonal coordinate system is also included within other accompanying drawing.
As shown in Fig. 1 to Fig. 3, under-voltage circuit breaker comprises the terminal unit 13 being connected to external power source.Terminal unit 13 can be arranged in the housing 10 of under-voltage circuit breaker.
Bar 20, indicating device 30, interrupt mechanism 40, electromagnetic tripping apparatus 90 and circuit board 14 are arranged in the interior compartment of housing 10.Circuit board 14 comprises field circuit.Bar door 16 and indicating device window 17 are formed in the upper surface of housing 10.
As shown in Figures 2 and 3, interrupt mechanism 40 comprises counterpart 41, driver connecting rod 50 (mobile connecting rod), distance rod 60 and latching member 70.Housing 10 is contained in indicating device 30 and the indicating device latching member 80 of the mode of operation of instruction under-voltage circuit breaker in indicating device window 17.
Bar 20 comprises pivot part 21 and bar protuberance 22.Pivot part 21 is around first pivot 18 pivotable that can be connected to the first lid 11 or can be formed on the first lid 11.When bar protuberance 22 is by operation, bar 20 is around the first pivot 18 pivotable.
Connecting rod 23 is parallel to the first pivot 18 from bar protuberance 22 and extends.Connecting rod 23 can be connected to the bar 20A of another circuit breaker 1A to form the breaker assembly 2 of combination, as shown in figs. 14 a-b.Therefore, connecting rod 23 makes the bar 20 of under-voltage circuit breaker 1 pivotable together with the bar 20A of another circuit breaker 1A.More one or more circuit breaker can be connected to described circuit breaker 1 and/or described another circuit breaker 1A.In the illustrated example, when bar protuberance 22 moves away from from terminal unit 13, bar protuberance 22 is positioned at on-position (make position) and when bar protuberance 22 moves near terminal unit 13, bar protuberance 22 is positioned at open position (open position).Such as by bar spring 25, bar 20 is promoted away from on-position always.In the following description, the direction (clockwise direction of Fig. 2) that bar 20 is pivoted to the on-position shown in Fig. 9 from the open position shown in Fig. 2 is called connection direction, and the direction (counter clockwise direction of Fig. 2) that bar 20 is pivoted to open position from on-position is called disconnection direction.
Counterpart 41 is supported pivotally by the 3rd pivot 43.Counterpart 41 maintenance can be one end of the depending post 42 of Metallic rod.The other end of depending post 42 to be projected into outside the second lid 12 by slit 12b and to be connected to the counterpart of another circuit breaker.
Driver connecting rod 50, latching member 70 and indicating device 30 are around the second pivot 19 pivotable.Second pivot 19 comprises two ends supported by housing 10.Back-moving spring 55 (it can be helical spring) and back-moving spring 56 (it can be torsion spring) promote driver connecting rod 50 along disconnecting direction always.
Back-moving spring 55 and 56 all has the one end being connected to the first lid 11 and the other end being connected to driver connecting rod 50.Bar spring 25 is always along disconnecting direction catch bar 20.Indicating device case spring 83 (it can be torsion spring) promotes indicating device latching member 80 along connecting direction always.
Distance rod 60 can be the metal round rod bending to U-shaped.Distance rod 60 comprises operative end 61 and transmits end 62.Operative end 61 is installed in the connecting hole 24 of bar 20.Transmit end 62 to be arranged in the tie rod holes 54 that formed by the junction surface 51 of driver connecting rod 50 and the lock portion 71 of latching member 70.In that case, distance rod 60 is by latching member 70 locking (blocking).In the lockout condition, distance rod 60 by the Movement transmit of bar 20 to driver connecting rod 50.
When driver connecting rod 50 is driven by electromagnetic tripping apparatus 90, driver connecting rod 50 and latching member 70 are pivoted relative to each other and this makes tie rod holes 54 open.Then, the transmission end 62 of distance rod 60 moves out tie rod holes 54.In that case, distance rod 60 discharges (unlocking state) from latching member 70.
4th pivot 82 supports indicating device latching member 80 pivotally.Indicating device case spring 83 promotes indicating device latching member 80 along disconnecting direction always.Indicating device latching member 80 comprises upper end 81, and the downside of indicating device 30 comprises engagement tabs 32.When the engagement tabs 32 of upper end 81 contact pointer 30 of indicating device latching member 80, indicating device 30 is limited further rotating of direction of disconnection.Indicating device 30 comprises the far-end of the indicating section 31 limiting indicating circuit state.Indicating section 31 comprises the upper surface being divided into two regions.Restriction normal region, the side 31a of the close bar 20 of indicating section, and the side away from bar 20 of indicating section limits dropout region 31b.One in 31a and 31b of region exposes from indicating device window 17.
Housing 10 containment circuit board 14.Electromagnetic tripping apparatus 90 is arranged on circuit board 14 so that by driving latching member 70 for induced current to solenoid 92.Circuit board 14 comprises field circuit, and when false voltage being detected, described field circuit stops the solenoid 92 of excitation electromagnetic tripping apparatus 90.
With reference to figure 4 and Fig. 5, electromagnetic tripping apparatus 90 comprises the bobbin 91, solenoid 92, fixed magnetic core 93, distance piece 100, retainer 96, removable magnetic core 97 and the helical spring 98 that are formed by synthetic resin.Fixed magnetic core 93 and removable magnetic core 97 are used separately as the first magnetic core and the second magnetic core.
Fixed magnetic core 93 can be formed by magnetic material (iron) plate.In the illustrated embodiment, fixed magnetic core 93 is U-shaped and comprises the first arm or upper arm 94 and the second arm or underarm 95.Underarm 95 is installed in the hole of bobbin 91.One end of bobbin 91 comprises inlet flange 91a and the other end of bobbin 91 comprises Outlet flange 91b.The underarm 95 of fixed magnetic core 93 comprises the far-end exposed from the Outlet flange 91b of bobbin 91.Helical spring 98 remains on the upper arm 94 of fixed magnetic core 93.
With reference to figure 6 to Fig. 8, retainer 96 is attached to the Outlet flange 91b of bobbin 91 pivotally.Protuberance 96b gives prominence to from the far-end of retainer 96.When retainer 96 pivotable, protuberance 96b promotes the engagement tabs 53 of driver connecting rod 50 and driver connecting rod 50 is rotated in connection direction.In the illustrated embodiment, engagement tabs 53 is arranged in the centre position between the distal portion of driver connecting rod 50 and proximal part.Removable magnetic core 97 (it can be plate of magnetic material) is kept by retainer 96 via latch plate element B.Retainer 96 comprises retainer pivot 96a, and it is supported pivotally by the Outlet flange 91b of bobbin 91.When retainer 96 is around retainer pivot 96a pivotable, removable magnetic core 97 is pivotable between following two positions, and these two positions are: removable magnetic core 97 contacts the position that two arms 94 of fixed magnetic core 93 are separated with the distal surface (magnetic pole surfaces) of 95 with two arms 94 of fixed magnetic core 93 with removable magnetic core with the position of the distal surface (magnetic pole surfaces) of 95.
With reference to figure 8 and Fig. 9, distance piece 100 is connected to fixed magnetic core 93 to reduce the gap between the outer surface of fixed magnetic core 93 and the in-profile of helical spring 98.Distance piece 100 comprises multiple elongate portion 101 and 102, and its axis at helical spring 98 extends.In the example shown, elongate portion 101 and 102 is two plates that are facing with each other and that extend along the upper arm 94 of fixed magnetic core 93.Bridge part 103 connects elongate portion 101 and 102.Distance piece 100 is axially being located relative to fixed magnetic core 93 with the contact of the rear surface 93a of fixed magnetic core 93 by bridge part 103.The shape and size of distance piece 100 are provided so that not produce and hinder the elongation of helical spring 98 and the frictional force of shortening.The layout of distance piece 100 in the gap between the outer surface and the Internal periphery of helical spring 98 of fixed magnetic core 93 prevents or limits the distortion of helical spring 98 and bend.This makes the motive force of helical spring 98 stablize and makes performance or the stable magnetic field of electromagnetic tripping apparatus.
The operation of under-voltage circuit breaker is described now with reference to Fig. 2 and Fig. 3 and Figure 10 to Figure 12.First the operation of the under-voltage circuit breaker when under-voltage circuit breaker is switched to the on-state of Figure 10 from the off-state of Fig. 2 will be described.
When bar 20 is pivoted to on-position (Figure 10) along connection direction from open position (Fig. 2), distance rod 60 promotes the junction surface 51 of driver connecting rod 50 and makes driver connecting rod 50 in connection direction pivotable.
First pivot 18 of connecting rod 20 is called as handoff boundary line with the straight line of the transmission end 62 of distance rod 60.Along with bar 20 is in connection direction pivotable, when the operative end 61 of distance rod 60 crosses handoff boundary line, the transmission end 62 of distance rod 60 is being stopped by during backup junction surface 51.At this, bar 20 and distance rod 60 remain on on-position, and under-voltage circuit breaker becomes connection.
The position that latching member 70 contacts the transmission end 62 of distance rod 60 is pivoted to by the latching member 70 of case spring 34 pivotable.Driver connecting rod 50 promotes the bonding part 33 of indicating device 30.This makes indicating device 30 in connection direction pivotable and moves to indication reset position.In that case, indicating device latching member 80 promotes and moves to the position of indicating device latching member 80 locking indicating device 30 by indicating device case spring 83.And counterpart 41 is connecting direction pivotable along with driver connecting rod 50 pivotable, and makes the counterpart of another circuit breaker move together with depending post 42.If voltage is normal in an on state, electric current is provided to the solenoid 92 of electromagnetic tripping apparatus 90 by field circuit.Removable magnetic core 97 is attracted to fixed magnetic core 93 by this.The motive force that helical spring 98 resisted by retainer 96 is pivoted to on-position.At this, be separated with driver connecting rod 50 at the protuberance 96b of retainer 96 far-end.
The operation of the under-voltage circuit breaker when under-voltage circuit breaker is switched to off-state from on-state will be described now.
When bar 20 is pivoted to open position (Fig. 2) along disconnection direction from on-position (Figure 10), distance rod 60 pulls latching member 70.This makes latching member 70 resist the motive force pivotable of case spring 34 and open tie rod holes 54 towards upside.
Driver connecting rod 50, and to be stopped when moving to contact spacer pin 99 in the disconnection direction pivotable of bar 20 by the motive force from back-moving spring 55 and 56, and the conjugate foramen 11b and second that described spacer pin is fixed to the first lid 11 covers the conjugate foramen 12c of 12.The conjugate foramen 12c of conjugate foramen 11b and second lid 12 of the first lid 11 is being formed close to protuberance 96b place, and described protuberance is the end contrary with retainer pivot 96a of retainer 96.Driver connecting rod 50 comprises the distal portion 57 of contact spacer pin 99.Distal portion 57 is close to the engagement tabs 53 of the promotion retainer 96 of driver connecting rod 50.Therefore, the expansion of driver connecting rod 50 can be limited.Spacer pin 99 is stiffener and has such as higher than the rigidity of retainer 96.In preferred example, retainer 96 is resin components, and spacer pin 99 is hardwares.Therefore, although contacted by back-moving spring 55 with 56 driver connecting rods 50 promoted and promote spacer pin 99, breaking or wearing and tearing of spacer pin 99 is also eliminated or reduces.
The protuberance 72 of latching member 70 is resisted motive force and is promoted counterpart 41 along disconnecting direction and make counterpart 41 pivotable.Case spring 34 promotes indicating device 30 in disconnection direction and makes indicating device 30 pivotable.When the upper end 81 of engagement tabs 32 contact pointer latching member 80, indicating device 30 stops.Here, the normal region 31a of indicating section 31 exposes from indicating device window 17.
When the disconnection direction pivotable of driver connecting rod 50 at bar 20, the protuberance 96b on the far-end of retainer 96 is pushed to the position shown in Fig. 2 by engagement tabs 53.As mentioned above, driver connecting rod 50 contacts spacer pin 99 and the further movement of limit rod 20 in disconnection direction.Therefore, even if when helical spring 98 makes retainer 96 around connection direction (clockwise direction of Fig. 2) pivotable of retainer pivot 96a at bar 20, the engagement tabs 53 of driver connecting rod 50 also limits the pivotable of retainer 96.
Here, as shown in figure 13, in retainer 96 and driver connecting rod 50, the distal surface S2 of the side S1 of side, connection direction or the engagement tabs 53 of contact-making surface and driver connecting rod 50 that are positioned at the protuberance 96b on retainer 96 contacts with each other.Here, side S1 and distal surface S2 is substantially parallel to each other.And surperficial S1 and S2 extends perpendicular to the motive force of helical spring 98, wherein said helical spring 98 makes retainer 96 in the connection direction pivotable of bar 20.In fig. 13, the angle theta be parallel between the plane RS of helical spring motive force and side S1 is 90 degree.
When retainer 96 is promoted by helical spring 98 while contacting with engagement tabs 53, retainer 96 is fixed and removable magnetic core 97 remains on the position that removable magnetic core 97 contacts the magnetic pole surfaces of fixed magnetic core 93.
The operation when electromagnetic tripping apparatus 90 works and under-voltage circuit breaker is switched to trip status (Figure 12) from on-state (Figure 10) will be described now.Figure 11 illustrates the moment that undervoltage tripping occurs.
At on-state (Figure 10), when field circuit detects value (lower than rated voltage (under-voltage condition)) of voltage lower than predetermined set, field circuit disconnects and is connected in series to the switch of solenoid 92 to make under-voltage circuit breaker thread off.
This makes electric current stop being fed to solenoid 92 and eliminating the electromagnetic attraction between fixed magnetic core 93 and removable magnetic core 97.Therefore, as shown in figure 11, when the motive force of helical spring 98 makes retainer 96 when connecting direction pivotable, the distal surface of retainer 96 or contact-making surface 96e near latching member 70 to make latching member 70 in disconnection direction pivotable.And the transmission end 62 of distance rod 60 moves away from from lock portion 71 and moves out tie rod holes 54.
Transmission end 62 due to distance rod 60 moves out tie rod holes 54 (as shown in figure 12), and the driver connecting rod 50 no longer supported by distance rod 60 is promoted by back-moving spring 55 and 56 and is pivoted to open position in disconnection direction.And counterpart 41 promotes towards upside by the protuberance 72 of latching member 70, and depending post 42 drives the interrupt mechanism of another circuit breaker to make interrupt circuit breaking-off contact.This makes electric current stop being fed to the load being connected to another circuit breaker, and thus protection load device.
Retainer 96 by the motive force of helical spring 98 in the connection direction pivotable of bar 20.But the motive force of back-moving spring 55 and 56 is set to the motive force being greater than helical spring 98.Therefore, when protuberance 96b contacts the engagement tabs 53 of driver connecting rod 50, bar 20 can not in the further pivotable in connection direction of bar 20.
When driver connecting rod 50 is by disconnection direction pivotable at bar 20 of the motive force of back-moving spring 55 and 56, the engagement tabs 53 of driver connecting rod 50 promotes the protuberance 96b of retainer 96.As a result, the disconnection direction of retainer 96 from position illustrated in fig. 11 at bar 20 is pivoted to position illustrated in fig. 12.When driver connecting rod 50 contacts spacer pin 99, being limited in the movement disconnecting direction of bar 20.Therefore, though when retainer 96 by helical spring 98 around connection direction (clockwise direction of Figure 12) pivotable of retainer pivot 96a at bar 20 time, the engagement tabs 53 of driver connecting rod 50 also limits the pivotable of retainer 96.
As shown in figure 13, when the side S1 of retainer 96 contacts the distal surface S2 of driver connecting rod 50, side S1 is parallel to distal surface S2.Two surperficial S1 and S2 extend perpendicular to the pushing direction making retainer 96 at the helical spring 98 of the connection direction pivotable of bar 20.
When retainer 96 is promoted by helical spring 98 while contacting with engagement tabs 53, retainer 96 is fixed and removable magnetic core 97 remains on the position that removable magnetic core 97 contacts the magnetic pole surfaces of fixed magnetic core 93.
The protuberance 96c of retainer 96 promotes indicating device latching member 80 in disconnection direction and makes latching member 80 pivotable (with reference to figure 3) so that by indicating device 30 unlocking.When indicating device 30 unlocking, indicating device 30 receives the motive force of case spring 34 and disconnects direction pivotable.The dropout region 31b of indicating section 31 exposes from indicating device window 17.Then, bar 20 receives the motive force of bar spring 25 and disconnects direction pivotable.When bar arrives open position, the transmission end 62 of distance rod 60 to be installed in tie rod holes 54 and to move to the position of transmitting engagement latch portion, end 62 71.Here, the transmission end 62 of distance rod 60 is installed in the tie rod holes 54 of being surrounded by driver connecting rod 50 and latching member 70.Therefore, when making bar 20 when connecting direction and being pivoted to on-position, state illustrated in fig. 10 is obtained.
The advantage of the present embodiment will be described now.
(1) electromagnetic tripping apparatus 90 comprises spacer pin 99, when removable magnetic core 97 contacts fixed magnetic core 93 due to the thrust of driver connecting rod 50, and the motion of the thrust restriction driver connecting rod 50 of described spacer pin opposing driver connecting rod 50.This reduce be applied to retainer 96 thrust, restriction retainer 96 plastic deformation and limit the displacement of driver connecting rod 50 from stop position.As a result, various displaceable element displacement electromagnetic tripping apparatus 90 and comprise electromagnetic tripping apparatus 90 under-voltage circuit breaker in restricted.This makes the contact stabilization between element and voltage characteristic is stablized.
(2) spacer pin 99 is positioned at the protuberance 96b side receiving thrust from driver connecting rod 50 of retainer 96.This restriction spacer pin 99 is relative to the displacement of protuberance 96b.Therefore, spacer pin 99 allows the thrust of driver connecting rod 50 to receive in correct position, and the displacement of driver connecting rod 50 is limited.
(3) retainer 96 by helical spring 98 around retainer pivot 96a pivotable to make fixed magnetic core 93 move away from removable magnetic core 97.And retainer 96 comprises the side S1 of contact driver connecting rod 50.When side S1 contacts driver connecting rod 50, the direction that side S1 acts on perpendicular to helical spring 98 extends.Therefore, even if when retainer 96 contacts driver connecting rod 50, the moment of flexure acted on retainer 96 also can reduce.This suppresses the plastic deformation of retainer 96 and limits the displacement of driver connecting rod 50 from stop position further.And the distal portion 57 of the contact spacer pin 99 of driver connecting rod 50 is positioned proximate to the engagement tabs 53 of driver connecting rod 50.The expansion of this restriction driver connecting rod 50.
(4) spacer pin 99 is separated with 12 with lid 11.Therefore, the circuit breaker not needing spacer pin 99 that 11 and 12 may be used for other is covered.
It will be apparent to those skilled in the art that the present invention can implement with other concrete forms many and not leave the spirit or scope of the present invention.Especially, it is to be appreciated that the present invention can implement with form below.
Spacer pin 99 need not be fixed to conjugate foramen 11b and 12c of lid 11 and 12.Such as, spacer pin 99 can be integrally formed with lid 11 and 12 in advance.Which reduce the quantity of parts.
Spacer pin is not limited to shaft-like spacer pin 99 and can has any form of the protuberance of similar plate.
In the above embodiments, under-voltage circuit breaker is used as circuit breaker.But as long as circuit breaker comprises electromagnetic tripping apparatus 90, other circuit breaker (such as overvoltage release) can be used.
Description is above intended to exemplary, and is nonrestrictive.Such as, can combine above-described example (or one is individual or many aspects) use each other.Other embodiments (such as can be passed through the description of reading above) and be used by those skilled in the art.Equally, in superincumbent embodiment, various feature can collect and is combined together to simplify the present invention.This disclosed feature that should not be interpreted as being intended to failed call protection is absolutely necessary to any claim.On the contrary, creationary theme can be all features being less than specific disclosed embodiment.Therefore, claim is below merged in embodiment in this article, and every claim is independent of independent embodiment.Scope of the present invention should be determined with reference to the four corner of additional claim with the equivalent of these claims issue.
Claims (9)
1. an electromagnetic tripping apparatus, described electromagnetic tripping apparatus comprises:
Helical spring;
First magnetic core, it is inserted through described helical spring;
Second magnetic core, it is by described coil spring urges away from described first magnetic core, and wherein said first magnetic core and described second magnetic core are configured so that the motive force that described first magnetic core and described second magnetic core are produced by described helical spring and the electromagnetic force by described first magnetic core generation are moved into and contact with each other and move away from each other;
Pivotable magnetic core retainer, it comprises base end part and distal portion, wherein said base end part comprises pivot, described distal portion is promoted by the thrust of driver connecting rod, and when described first magnetic core produces electromagnetic force, described magnetic core retainer is along described first magnetic core and described second magnetic core approximating direction pivotable; With
Restricted part, when the contact of described magnetic core retainer or close to described driver connecting rod and described first magnetic core contact described second magnetic core time, the thrust of described restricted part opposing driver connecting rod limits the motion of driver connecting rod.
2. electromagnetic tripping apparatus according to claim 1, wherein said restricted part is arranged to the distal portion away from magnetic core retainer pivot close.
3. electromagnetic tripping apparatus according to claim 1, wherein:
Described magnetic core retainer pivotally pivotable by coil spring urges and on the direction moving away from the first magnetic core at the second magnetic core;
Described magnetic core retainer comprises the contact surface contacting described driver connecting rod; With
When described contact surface contacts with described driver connecting rod, described contact surface extends perpendicular to the direction of described helical spring motive force.
4. electromagnetic tripping apparatus according to claim 1, the contact of wherein said restricted part and described driver connecting rod limits the mobile range of described driver connecting rod.
5. electromagnetic tripping apparatus according to claim 1, wherein:
Described driver connecting rod is supported so that around its base end part pivotable;
Described driver connecting rod comprises distal portion, and when described driver connecting rod pivotable, described distal portion contacts described restricted part;
Described driver connecting rod comprises the engagement tabs between the base end part and distal portion of described driver connecting rod, the distal portion of wherein said engagement tabs contact magnetic core retainer; With
Described restricted part is stiffener, and when the engagement tabs of described driver connecting rod contacts the distal portion of described magnetic core retainer, described stiffener contacts the distal portion of described driver connecting rod.
6. a circuit breaker, it comprises electromagnetic tripping apparatus according to any one of claim 1 to 5.
7. circuit breaker according to claim 6, described circuit breaker also comprises:
Bar, its supported in case between on-position and open position pivotable, wherein at described on-position, movable contact contacts with fixed contact, and at described open position, described movable contact moves away from described fixed contact; With
Interrupt mechanism, it directly or is indirectly connected to described bar, and wherein when described bar pivotable, described interrupt mechanism makes described movable contact move away from described fixed contact,
Wherein said electromagnetic tripping apparatus is constructed to make described movable contact move away from described fixed contact when predetermined circuit state being detected.
8. a breaker assembly for combination, comprising:
First circuit breaker, it is circuit breaker according to claim 6; And
Be connected to the second circuit breaker of the first circuit breaker.
9. the breaker assembly (2) of combination according to claim 8, wherein
Each in first circuit breaker and the second circuit breaker comprises bar; And
The bar of the first and second circuit breakers connects via connecting rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-123031 | 2013-06-11 | ||
| JP2013123031A JP2014241225A (en) | 2013-06-11 | 2013-06-11 | Electromagnetic tripping device and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104241047A true CN104241047A (en) | 2014-12-24 |
| CN104241047B CN104241047B (en) | 2016-09-21 |
Family
ID=52140378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410252141.2A Expired - Fee Related CN104241047B (en) | 2013-06-11 | 2014-06-09 | Electromagnetic tripping apparatus and chopper |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014241225A (en) |
| CN (1) | CN104241047B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609386B (en) * | 2016-03-15 | 2018-10-23 | 佳一电气有限公司 | Control and protective switching device |
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| CN2231449Y (en) * | 1995-07-21 | 1996-07-17 | 顾文华 | Electromagnetic tripping device for circuit breaker |
| JPH10125206A (en) * | 1996-10-24 | 1998-05-15 | Fuji Electric Co Ltd | Electromagnetic trip device for circuit breaker |
| JP2000231869A (en) * | 1998-12-10 | 2000-08-22 | Fuji Electric Co Ltd | Circuit breaker |
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| CN1514458A (en) * | 2002-12-14 | 2004-07-21 | Lg产电株式会社 | Auxiliary equipment used on manual electric machine actuator |
| EP1473752B1 (en) * | 2003-04-30 | 2008-03-26 | Siemens Aktiengesellschaft | Electromagnetic trip device |
| CN102024630A (en) * | 2009-09-15 | 2011-04-20 | 无锡唯特电气技术有限公司 | Electromagnetic release |
| CN201975350U (en) * | 2011-04-25 | 2011-09-14 | 浙江天正电气股份有限公司 | Small-sized circuit breaker with function of undervoltage and overvoltage protection |
| CN104078289A (en) * | 2013-03-29 | 2014-10-01 | 松下电器产业株式会社 | Electromagnetic trip device and circuit breaker |
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| JPS51130862A (en) * | 1975-05-10 | 1976-11-13 | Fuji Electric Co Ltd | Enclosed electromagnet |
| US4237436A (en) * | 1979-01-15 | 1980-12-02 | Heinemann Electric Company | Circuit breaker having a modified armature for time delays at high transient currents |
| JPH07114099B2 (en) * | 1985-11-18 | 1995-12-06 | 三菱電機株式会社 | Circuit breaker |
| JP2864721B2 (en) * | 1990-11-08 | 1999-03-08 | 富士電機株式会社 | Circuit breaker |
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|---|---|---|---|---|
| CN2231449Y (en) * | 1995-07-21 | 1996-07-17 | 顾文华 | Electromagnetic tripping device for circuit breaker |
| JPH10125206A (en) * | 1996-10-24 | 1998-05-15 | Fuji Electric Co Ltd | Electromagnetic trip device for circuit breaker |
| JP2000231869A (en) * | 1998-12-10 | 2000-08-22 | Fuji Electric Co Ltd | Circuit breaker |
| CN2562348Y (en) * | 2002-08-01 | 2003-07-23 | 严洪启 | Minimum voltage releaser of circuit breaker |
| CN1514458A (en) * | 2002-12-14 | 2004-07-21 | Lg产电株式会社 | Auxiliary equipment used on manual electric machine actuator |
| EP1473752B1 (en) * | 2003-04-30 | 2008-03-26 | Siemens Aktiengesellschaft | Electromagnetic trip device |
| CN102024630A (en) * | 2009-09-15 | 2011-04-20 | 无锡唯特电气技术有限公司 | Electromagnetic release |
| CN201975350U (en) * | 2011-04-25 | 2011-09-14 | 浙江天正电气股份有限公司 | Small-sized circuit breaker with function of undervoltage and overvoltage protection |
| CN104078289A (en) * | 2013-03-29 | 2014-10-01 | 松下电器产业株式会社 | Electromagnetic trip device and circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014241225A (en) | 2014-12-25 |
| CN104241047B (en) | 2016-09-21 |
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