CN1525513A - Residual current action tripping device for phase line and mid line circuit breaker - Google Patents
Residual current action tripping device for phase line and mid line circuit breaker Download PDFInfo
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- CN1525513A CN1525513A CNA031467520A CN03146752A CN1525513A CN 1525513 A CN1525513 A CN 1525513A CN A031467520 A CNA031467520 A CN A031467520A CN 03146752 A CN03146752 A CN 03146752A CN 1525513 A CN1525513 A CN 1525513A
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- lever
- connecting rod
- circuit breaker
- tripping
- residual current
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Abstract
The invention refers to a kind of residual current tripping mechanism whose phase wire and neutral wire have residual current protection circuit breaker. It includes a driving device and a tripping lever, the driving device includes an electromagnetic tripping device for generating driving force, a link for transmitting the driving force, one of the link contacts with the carrier rod of electromagnetic tripping device, another end has a convex platform; a link reset spring; its main character lies in one end of the tripping lever is contacted to the convex platform of link, the other end is pin jointed to the subjacent arm of the lever of the circuit breaker manipulating mechanism. Because that has a distance about an arm length between the joint of the tripping lever and manipulating mechanism lever and the lever pivot, so it can increase the driving tension arm, thus it can reduce the tripping force effectively, and the structure is simple, needn't to add a middle mechanism or upgrade the design parameter.
Description
Technical field
The present invention relates to a kind of parts of low-voltage electrical apparatus; the residual current acting tripping mechanism of specifically a kind of phase line and neutral circuit band residual current protecting circuit breaker; its effect is when residual current surpasses setting; the fulcrum that will be in the circuit breaker operation mechanism of closure state is disintegrated and cut-off breaker, plays the effect of open circuit protection.
Background technology
The circuit breaker of general band residual current protecting comprises an operating mechanism and a tripping mechanism, and described operating mechanism adopts quadric chain usually, sees Chinese patent ZL8803427 " a kind of operating mechanism of miniature circuit breaker " for details.Described tripping mechanism comprises a drive unit and a shank.Described drive unit comprises the magnetictrip and the mechanism that transmits and amplify described actuating force that produce actuating force.When residual current surpasses setting, the magnetictrip action produces actuating force and passes to shank by push rod by the actuating force enlarger, and the lever that shank drives operating mechanism sways, the quadric chain of operating mechanism is disintegrated, and circuit breaker disconnected after the contact was opened.
Adopt the purpose of actuating force enlarger to be: because distance is less between the pivot 22 of the interlock position 24 of shank and operating mechanism lever and lever, thereby the arm of force is shorter, the requirement actuating force is big, for the residual current drive unit, if increase the magnetictrip actuating force, then to increase the power output of tripping coil so that increase the magnetictrip volume, in the inner chamber capsule that the 16mm height is only arranged, can't realize, therefore tackle actuating force and carry out the intermediate link amplification.This general structure of class mechanism is comparatively complicated, and parts size precision is had relatively high expectations, and has increased cost of goods manufactured.
Summary of the invention
What the present invention will solve is the above-mentioned defective that existing residual current acting tripping mechanism exists; provide a kind of simple in structure and can satisfy the residual current acting tripping mechanism of circuit breaker operation mechanism tripping force requirement, it is applicable to the phase line and the neutral circuit circuit breaker of band residual current protecting.
The technical scheme that addresses the above problem employing is: be used for the residual current acting tripping mechanism of phase line and neutral circuit circuit breaker, comprise a drive unit and a dropout lever, described drive unit comprises:
_ _ one magnetictrip that produces actuating force;
_ _ one connecting rod that transmits described actuating force, the one end contacts with the push rod of described magnetictrip, and the other end is provided with a boss;
_ _ one connecting rod back-moving spring;
Its main feature is that described dropout lever one end leans on the boss of described connecting rod, and the other end is articulated on the underarm of lever of circuit breaker operation mechanism.
The dropout actuating force that residual current acting tripping mechanism drive unit of the present invention produces by the dropout lever transmission to the underarm of the lever of operating mechanism, because brachium apart between the connection place of dropout lever and operating mechanism lever and the lever pivot, can increase the driving arm of force, thereby can reduce required tripping force effectively, and structure is simple relatively, need not increase intermediary agency or improve design parameter.
As a further improvement on the present invention, the dividing plate made from an insulating material between described drive unit and the dropout lever is separated by, and the transmission of power is to contact with the dropout lever then by the oblong slots that the connecting rod convex platform inserts dividing plate to realize between connecting rod and the dropout lever.
The surface that is used to install described drive unit on the described dividing plate is provided with two pairs of cylinders that described connecting rod is play the guiding role, and the bottom surface of described connecting rod is provided with muscle.Thereby contacting between described connecting rod and the described cylinder, between described connecting rod and the described dividing plate be the line contact, and this just makes that the force of sliding friction between connecting rod and cylinder and the dividing plate is less, has improved the transmission efficiency of connecting rod to actuating force.
Described dropout lever is L-shaped, matches with described thermal overload trigger element simultaneously.It had both become the dropout lever of residual current acting mechanism like this, had the function of thermal overload dropout lever simultaneously again.
Further improve again as of the present invention, described drive unit also is provided with a residual current acting indication piece and a back-moving spring, the L-shaped formation synchronous reset that matches with the hook-shaped arm of described connecting rod in described indication piece bottom, that is: when normal operation of circuit breaker, " L " shape bottom inlay card of described indication piece is also locked in the hook-shaped arm of described connecting rod, the indication normal operating conditions.When tripping mechanism moved, connecting rod moved outward this locking is disengaged, and described indication piece knock-ons under the effect of back-moving spring and resets, the indication off state; Make described connecting rod can't reset because " L " shape bottom of described indication piece leans the hook-shaped arm end at described connecting rod this moment.By described indication piece, inlay card is in the hook-shaped arm of described connecting rod once more to make " L " shape bottom down, and connecting rod just can reset under the use of back-moving spring.
Description of drawings
From the description of the following drawings illustrated embodiment, can more be clear that advantages and features of the invention, wherein:
Fig. 1 is that residual current tripping mechanism of the present invention resets the structural representation when circuit breaker is in off-state.
Fig. 2 is the structural representation of residual current tripping mechanism of the present invention when circuit breaker is in closure state.
Fig. 3 is a residual current tripping mechanism of the present invention at the structural representation of circuit breaker when residual current acting disconnects, indication piece ejects and the residual current tripping mechanism does not reset.
Fig. 4 is the sectional drawing of being got along A-A direction among Fig. 2, shows connecting rod (7) and the driving part of thermo bimetal's element (16) to dropout lever (15).
Fig. 5 is the shaft side figure of whole circuit breaker at Fig. 4.
Fig. 6 is circuit breaker operation mechanism structure chart (circuit breaker is in closure state), shows the installation site of dropout lever (7).
Fig. 7 circuit breaker operation mechanism part shaft side figure.
Fig. 8 is the partial enlarged drawing of Fig. 4.
Embodiment
With reference to accompanying drawing, the residual current acting tripping mechanism that is used for phase line and neutral circuit circuit breaker of the present invention comprises a drive unit and a dropout lever 15.Fig. 1 to Fig. 3 is the structural representation of described drive unit, it comprises the magnetictrip 1 and the connecting rod 7 that transmits described actuating force that produce actuating force, the left end of described connecting rod 7 contacts with the push rod 2 of described magnetictrip 1, and the other end is provided with a boss 14; Described boss 14 passes set oblong slots 8 on the insulating barrier 9 and leans left side at dropout lever 15.Connecting rod back-moving spring 4 one ends are fixed on the left end of connecting rod 7, and the other end is fixed on the dividing plate 9.
With reference to Fig. 8, the surface that is used to install described drive unit on the described dividing plate 9 is provided with two pairs of cylinders 10 that described connecting rod 7 is play the guiding role, and the bottom surface of described connecting rod 7 is provided with muscle 31.Thereby contacting between described connecting rod 7 and the described cylinder 10, between described connecting rod 7 and the described dividing plate 9 be the line contact, and this just makes that the force of sliding friction between connecting rod and cylinder and the dividing plate is less, can improve the transmission efficiency of connecting rod to actuating force.
Described drive unit also is provided with residual current acting indication piece 6 and indication reset spring 5, the hook-shaped arm 32 of the L-shaped and described connecting rod 7 in the described indication piece 6 bottoms formation synchronous reset that matches, that is: when normal operation of circuit breaker, " L " shape of described indication piece 6 bottom inlay card the hook-shaped arm 32 of described connecting rod in and locked, indicate normal operating conditions this.When tripping mechanism moved, connecting rod moved outward this locking is disengaged, and described indication piece knock-ons under the effect of back-moving spring 5 and resets, the indication off state; Make described connecting rod can't reset because " L " shape bottom of described indication piece 6 leans hook-shaped arm 32 ends at described connecting rod this moment.By described indication piece, inlay card is in the hook-shaped arm of described connecting rod once more to make " L " shape bottom down, and connecting rod just can reset under the use of back-moving spring.
Circuit breaker with reference to Fig. 4,5, one complete band residual current protectings comprises a tripping mechanism and an operating mechanism, and both split in the upper and lower die cavity of dividing plate 9; The drive unit of described tripping mechanism is by the salient position of floor plan in dividing plate 9 die cavities, and described operating mechanism then is set in the die cavity 33 of another side of dividing plate.
Fig. 6,7 show four tie circuit breaker operating mechanisms of a standard, it comprises handle 3, handle back-moving spring 17, a connecting rod 18 that connects handle and snap close, a plate that is used to carry 19, snap close 20, be arranged on the snap close rotation pivot 21 on the plate 19, one forms the lever 23 of the mechanical interlocking that can throw off with described snap close, a rotation pivot 22 that is arranged on the described lever 21 on the described plate 19, moving contact 27,28, fixed contact 29,30 and swing arm rotation pivots 25 that are arranged on the described plate 19, concrete structure can be referring to Chinese patent ZL8803427 " a kind of operating mechanism of miniature circuit breaker ".
Cross as previously mentioned, existing residual current tripping mechanism, the end of its connecting rod connects a shank, because operating mechanism lever 23 is articulated on the plate 19, have one to reinforce the position around pivot 22, described shank is plugged in the axis hole 24 at this reinforcing position.Though such structure is compact, obviously, the axis hole 24 and the distance between the lever pivot 22 of shank are very little, make to require actuating force bigger.
The main improvements of residual current tripping mechanism of the present invention are to be provided with special-purpose dropout lever 15, described dropout lever 15 1 ends lean on the right side of described connecting rod boss 7, and the other end is installed on the pivot 26 of underarm end of lever 23 of circuit breaker operation mechanism.Thereby this structure can effectively increase the driving arm of force, reduces required tripping force largely, and structure is simple relatively, need not increase intermediary agency or improve design parameter.
Below the course of work of the present invention is described further:
Move circuit breaker handle 3 as Fig. 2 to the arrow B direction, drivening rod 18 drives pivot 21 rotations of snap close 20 winding boards 19, when rotating to certain position and lever 23 buckle again, continuation is moved handle 3 to the arrow B direction, then plate 19, snap close 20 and lever 23 form the rigidity connecting rods and around pivot 25 rotating band moving contacts 27,28 and contact 29,30 closures, circuit breaker is in closure state as shown in Figure 2.If when residual current occurring and reaching the compulsory exercise value in the circuit, magnetictrip 1 action, produce actuating force and pass to connecting rod 7 by push rod 2 contacts, connecting rod 7 is passed to dropout lever 15 and is driven dropout lever 15 to the motion of arrow E direction as shown in Figure 4 by boss 14 after by the lost motion of 0.6mm, pivot 22 rotations of dropout lever 15 activation lever 23 winding boards 19, when lever 23 rotates to the slide fastener position, snap close 20 is with lever 23 slide fasteners and around pivot 21 rotations, by plate 19, the rigidity connecting rod that snap close 20 and lever 23 form disintegrates, operating mechanism discharges rapidly, contact 27,28,29,30 open, handle 3 resets under back-moving spring 17 effects, while indication piece 6 and connecting rod 7 slide fasteners, indication piece 6 ejects in spring 5 effect lower edge arrow D directions, as shown in Figure 3.
After circuit breaker disconnects because of residual current acting, as shown in Figure 3, if close circuit breaker once more, must press indication piece 6 and make indication piece plane 12 and circuit breaker plane 11 in same plane along the opposite direction of arrow D direction, connecting rod 7 moves to the opposite direction of arrow C direction under back-moving spring 4 effect and resets and buckle with indication piece 6 again, as shown in Figure 1.If indication piece 6 still is in Fig. 3 state, connecting rod 7 opposite direction to the arrow C direction under back-moving spring 4 effects moves, 13 places and indication piece 6 interfere in the position, connecting rod 7 can not reset, move handle 3 to arrow B direction shown in Figure 2, drivening rod 18 drives pivot 21 rotations of snap close 20 winding boards 19, when rotating to certain position and lever 23 buckle again, continuation is moved handle 3 to the arrow B direction, then plate 19, snap close 20 and lever 23 form the rigidity connecting rod and rotate around pivot 25, dropout lever 15 also moves and interferes with the boss 14 of connecting rod 7 with lever 23 is corresponding, hinder lever 23 on the one hand around pivot 25 rotations, on the other hand at rigidity connecting rod 19,20,23 continue in pivot 25 rotations, and dropout lever 15 makes lever 23 around pivot 22 reverse rotations, when the slide fastener position is arrived in lever 23 reverse rotations, snap close 20 is with lever 23 slide fasteners and around pivot 21 rotations, by plate 19, the rigidity connecting rod that snap close 20 and lever 23 form disintegrates, and operating mechanism discharges rapidly, and circuit breaker can not be closed.
When if circuit overload current occurs and reaches operating value, thermo bimetal's element 16 heated bendings drive dropout lever 15 to arrow E direction motion as shown in Figure 4, pivot 22 rotations of dropout lever 15 activation lever 23 winding boards 19, when lever 23 rotates to the slide fastener position, snap close 20 is with lever 23 slide fasteners and around pivot 21 rotations, by plate 19, the rigidity connecting rod that snap close 20 and lever 23 form disintegrates, operating mechanism discharges rapidly, contact 27,28,29,30 open, handle 3 resets under back-moving spring 17 effects, if do not remain operating current in the circuit, magnetictrip 1 can not move so that drive link 7 is moved, and indication piece 6 can not eject.
Claims (6)
1, the residual current acting tripping mechanism that is used for phase line and neutral circuit circuit breaker comprises a drive unit and a dropout lever (15), and described drive unit comprises:
---a magnetictrip (1) that produces actuating force;
---a connecting rod (7) that transmits described actuating force, the one end contacts with the push rod (2) of described magnetictrip (1), and the other end is provided with a boss (14);
---a connecting rod back-moving spring (4);
It is characterized in that described dropout lever (15) one ends lean the boss (14) in described connecting rod (7)
On, the other end is articulated on the underarm of lever (23) of circuit breaker operation mechanism.
2, tripping mechanism as claimed in claim 1, it is characterized in that the dividing plate made from an insulating material between described drive unit and the dropout lever (15) (9) is separated by, the transmission of power is to contact with dropout lever (15) then by the oblong slots (8) that connecting rod (7) convex platform (14) inserts dividing plate (9) to realize between connecting rod (7) and the dropout lever (15).
3, tripping mechanism as claimed in claim 2, the surface that it is characterized in that being used on the described dividing plate (9) installing described drive unit is provided with two pairs of cylinders (10) that described connecting rod (7) is play the guiding role.
4, tripping mechanism as claimed in claim 3 is characterized in that the bottom surface of described connecting rod (7) is provided with muscle (31).
5, tripping mechanism as claimed in claim 4 is characterized in that, described dropout lever (15) is L-shaped, matches with described thermal overload trigger element (16) simultaneously.
6, as any one described tripping mechanism of claim 1～5, it is characterized in that also being provided with a residual current acting indication piece (6) and a back-moving spring (5), the hook-shaped arm (32) of the L-shaped and described connecting rod in described indication piece (6) bottom (7) the formation synchronous reset that matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031467520A CN1525513A (en) | 2003-06-24 | 2003-06-24 | Residual current action tripping device for phase line and mid line circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031467520A CN1525513A (en) | 2003-06-24 | 2003-06-24 | Residual current action tripping device for phase line and mid line circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1525513A true CN1525513A (en) | 2004-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031467520A Pending CN1525513A (en) | 2003-06-24 | 2003-06-24 | Residual current action tripping device for phase line and mid line circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN1525513A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334672C (en) * | 2004-12-30 | 2007-08-29 | Tcl国际电工(无锡)有限公司 | Electromagnetic residual current acting accessory device |
| CN100421200C (en) * | 2006-02-17 | 2008-09-24 | 浙江正泰电器股份有限公司 | Operation mechanism of mini-type residual current actuated breaker |
| CN101944460A (en) * | 2009-07-07 | 2011-01-12 | 三菱电机株式会社 | Circuit breaker |
| CN102280319A (en) * | 2010-05-31 | 2011-12-14 | 西门子公司 | Switch, especially breaker applied in low voltage |
| CN102347167A (en) * | 2010-07-21 | 2012-02-08 | 西门子公司 | Electrical switch |
| CN101656180B (en) * | 2008-08-18 | 2012-08-22 | 湖北盛佳电器设备有限公司 | Electromagnetic short circuit protection breaker |
| CN102857139A (en) * | 2012-07-25 | 2013-01-02 | 中国科学技术大学 | High-rigidity self-matched three-friction stepper abreast driven by double piezoelectric transducers |
-
2003
- 2003-06-24 CN CNA031467520A patent/CN1525513A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334672C (en) * | 2004-12-30 | 2007-08-29 | Tcl国际电工(无锡)有限公司 | Electromagnetic residual current acting accessory device |
| CN100421200C (en) * | 2006-02-17 | 2008-09-24 | 浙江正泰电器股份有限公司 | Operation mechanism of mini-type residual current actuated breaker |
| CN101656180B (en) * | 2008-08-18 | 2012-08-22 | 湖北盛佳电器设备有限公司 | Electromagnetic short circuit protection breaker |
| CN101944460A (en) * | 2009-07-07 | 2011-01-12 | 三菱电机株式会社 | Circuit breaker |
| CN102280319A (en) * | 2010-05-31 | 2011-12-14 | 西门子公司 | Switch, especially breaker applied in low voltage |
| CN102280319B (en) * | 2010-05-31 | 2015-07-08 | 西门子公司 | Switch, especially breaker applied in low voltage |
| CN102347167A (en) * | 2010-07-21 | 2012-02-08 | 西门子公司 | Electrical switch |
| CN102347167B (en) * | 2010-07-21 | 2015-11-18 | 西门子公司 | Electric switch |
| CN102857139A (en) * | 2012-07-25 | 2013-01-02 | 中国科学技术大学 | High-rigidity self-matched three-friction stepper abreast driven by double piezoelectric transducers |
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