CN1734696A

CN1734696A - Electromagnetic breaker tripping mechanism

Info

Publication number: CN1734696A
Application number: CN 200510041236
Authority: CN
Inventors: 陈景正
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-26
Filing date: 2005-07-26
Publication date: 2006-02-15
Anticipated expiration: 2025-07-26
Also published as: CN100392787C

Abstract

This invention relates to electromagnetic tripping mechanism for circuit breaker, which comprises an iron core composed of tripping iron core and impact iron core, moving contact groupware matched with iron core, and tripping coil arranged out the iron core; wherein, the front end of tripping iron core crosses control contact groupware of impact iron core, the corresponding back end props up to reset spring propped to magnet yoke; arranging reset spring for impact iron core between the two iron cores. The invention overcomes the shortcoming in existing product, has strong protection function and stable closure state.

Description

Electromagnetic breaker tripping mechanism

Technical field

The present invention relates to a kind of breaker tripping mechanism, particularly a kind of electromagnetic breaker tripping mechanism.

Background technology

Tripping mechanism is under the improper situation at circuit as circuit breaker and separates fixed contact and moving contact and the actuator of open circuit is the chief component of open circuit protection socket.Tripping mechanism is divided into mechanical tripping mechanism and electromagnetic releaser mechanism, and electromagnetic releaser mechanism comprises: the electromagnetism spare that is used to produce electromagnetic force; Be slidingly mounted in the electromagnetism spare and the armature that can under the electromagnetic force effect, move; The support body that links to each other with armature is moved between the primary importance and the second place by the axis of armature drive along electromagnetism spare, and support body makes movable contact spring separate with static contact or contacts; Be used for armature is fixed on the locking piece of the second place; Have projection on the described support body, in described primary importance, described projection combines with movable contact spring, and in the described second place, support body promotes movable contact spring by projection and contacts with static contact; Described locking piece be can by described armature one end of magnetic attraction and can with the permanent magnet of its adhesive, the confining force of the magnetic force that utilizes permanent magnet during as the ground-fault interrupter closure state.This electromagnetic releaser mechanism exists following defective: the one, and support body promotes movable contact spring by projection and contacts with static contact, and the length that the arm of movable contact spring need be certain, and it is unstable, bad that this easily causes movable contact spring to contact with static contact; The 2nd, utilize permanent magnet as the locking piece that armature is fixed on the second place, the confining force of the magnetic force that utilizes permanent magnet during as the ground-fault interrupter closure state, this requires permanent magnet that enough magnetic force adhesive armatures are arranged, correspondingly, when fault current, electromagnetism spare also will have enough electromagnetic forces to move armature, armature is separated with permanent magnet turn back to primary importance, because the elastic force effect of movable contact spring, movable contact spring separates with static contact, and this easily causes the malfunctioning fault of circuit breaker tripping.

Summary of the invention

In order to overcome the above-mentioned defective of electromagnetic releaser mechanism in the prior art, the invention provides a kind of electromagnetic breaker tripping mechanism, the compact conformation of this electromagnetic breaker tripping mechanism, the contact stabilization of its moving contact and fixed contact is reliable, when circuit leaks electricity, can both thread off when short circuit and overload (overcurrent), dropout highly sensitive.

The technical solution adopted for the present invention to solve the technical problems is: comprise iron core, the moving contact component that matches with iron core and be arranged on the outer tripping coil of iron core, iron core is connected and composed by dropout iron core and the movable sliding sleeve of impact iron core, the front end of dropout iron core passes and impacts iron core control moving contact component, the rear end roof pressure is on back-moving spring, back-moving spring and yoke offset, and between impact iron core and dropout iron core the impact iron core return-spring are set.

The composition surface of dropout iron core and moving contact component is the inclined plane.

The outer tripping coil of iron core is electric leakage tripping coil or short circuit tripping coil.

The outer tripping coil of iron core is electric leakage tripping coil and the short circuit tripping coil that is set up in parallel, and impacts between iron core return-spring and the dropout iron core that insulating case being set.

The rear end and the bimetal leaf of dropout iron core link.

Extend the rear end of dropout iron core and stator joins, and the adjustment screw on the stator is pressed against on the bimetal leaf, and the upper end and the yoke of bimetal leaf are connected and fixed.

The present invention is by above-mentioned specific design; make tripping mechanism possess electric leakage dropout protection, short circuit dropout protection and overcurrent (overload) dropout defencive function simultaneously; owing to adopted the front end of dropout iron core and moving contact component lower end to form the snapping on band inclined plane and the design of impacting iron core; make the action of threading off sensitiveer; has compact conformation, moving contact and the stable advantage of fixed contact closure state.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples

Fig. 1 is the embodiment of the invention one an attracting state machine structure cutaway view;

Fig. 2 is the embodiment of the invention two trip status machine structure cutaway views.

Embodiment

Shown in figure one, the moving contact component 3 that the present invention includes iron core, matches and be arranged on the outer tripping coil of iron core with iron core, iron core is connected and composed by dropout iron core 1 and impact iron core 2 movable sliding sleeves, the front end of dropout iron core 1 passes and impacts iron core 2 control moving contact components 3, the rear end roof pressure is on back-moving spring 4, back-moving spring 4 offsets with yoke 12, between impact iron core 2 and dropout iron core 1, be provided with and impact iron core return-spring 5, dropout iron core 1 is the inclined plane with the composition surface of moving contact component 3, to improve the sensitivity of threading off.According to different job requirements, the outer tripping coil of iron core is electric leakage tripping coil 6 or short circuit tripping coil 7, also can be that the outer tripping coil of iron core is electric leakage tripping coil 6 and the short circuit tripping coil 7 that is set up in parallel shown in figure two, between impact iron core return-spring 5 and dropout iron core 1, insulating case 8 is set.The rear end of dropout iron core 1 can link with bimetal leaf 11, and its syndeton can be that extend the rear end of dropout iron core 1 and stator 9 joins, and the adjustment screw 10 on the stator 9 is pressed against on the bimetal leaf 11, and the upper end of bimetal leaf 11 and yoke 12 are connected and fixed.

In normal operation; circuit is in closure state; when producing leakage current (residual current) in the circuit; produce voltage signal in the control circuit; trigger the conducting of dropout controllable silicon; impel electric leakage tripping coil 6 charged; produce magnetic field to impact iron core 2 snap actions are outwards pulled out; and to the outside impulsive force of dropout iron core 1 generation; add 1 pullout forces outside under the effect of electromagnetic force of dropout iron core, dropout iron core 1 separates with moving contact component 3, and moving contact component 3 is return under the effect of return spring 13; moving; fixed contact disconnects, and finishes electric leakage dropout protection action.Impact the impulsive force of iron core 2 and the pullout forces addition of dropout iron core 1 and improved the dropout performance greatly, when low-voltage≤50V, also can play the dropout defencive function.

When circuit is short-circuited; immediate current (short circuit current) is much larger than the multiple of rated current; short circuit tripping coil 7 directly produces magnetic field; pull out dropout (pull out greater than 0.5mm and can thread off) laterally to making dropout iron core 1; dropout iron core 1 separates with moving contact component 3; moving contact component 3 is return under the effect of return spring 13, and dynamic and static contact disconnects, and finishes short circuit dropout protection action.

Having served as live stream, to surpass 1.13 times of load current value (be I _t＞1.13I _n) time; by short circuit tripping coil 7 current lead-through is arrived bimetal leaf 11; bimetal leaf 11 flexural deformation laterally of will generating heat; and in official hour, dropout iron core 1 is outwards pulled out; dropout iron core 1 separates with moving contact component 3; moving contact component 3 is return under the effect of return spring 13, and overcurrent (overload) dropout protection action is finished in the fixed contact outage.Because bimetallic adjustment screw 10 is installed in and the screw hole of the stator 9 of the iron core 1 welding one of threading off in, and be pressed against on the bimetal leaf 11, can adjust the drop-away time of bimetal leaf 11 during rotation adjustment screw 10.

Claims

1. electromagnetic breaker tripping mechanism, it is characterized in that: the moving contact component that comprise iron core, matches (3) and be arranged on the outer tripping coil of iron core with iron core, iron core is connected and composed by dropout iron core (1) and the movable sliding sleeve of impact iron core (2), the front end of dropout iron core (1) passes and impacts iron core (2) control moving contact component (3), the rear end roof pressure is on back-moving spring (4), back-moving spring (4) offsets with yoke (12), is provided with to impact iron core return-spring (5) between impact iron core (2) and dropout iron core (1).

2. electromagnetic breaker tripping mechanism according to claim 1 is characterized in that: dropout iron core (1) is the inclined plane with the composition surface of moving contact component (3).

3. electromagnetic breaker tripping mechanism according to claim 1 and 2 is characterized in that: the outer tripping coil of iron core is electric leakage tripping coil (6) or short circuit tripping coil (7).

4. electromagnetic breaker tripping mechanism according to claim 1 and 2, it is characterized in that: the outer tripping coil of iron core is electric leakage tripping coil (6) and the short circuit tripping coil (7) that is set up in parallel, and impacts between iron core return-spring (5) and the dropout iron core (1) that insulating case (8) being set.

5. electromagnetic breaker tripping mechanism according to claim 3 is characterized in that: the rear end of dropout iron core (1) and bimetal leaf (11) link.

6. electromagnetic breaker tripping mechanism according to claim 4 is characterized in that: the rear end of dropout iron core (1) and bimetal leaf (11) link.

7. according to claim 5 or 6 described electromagnetic breaker tripping mechanisms, it is characterized in that: extend the rear end of dropout iron core (1) and stator (9) joins, adjustment screw (10) on the stator (9) is pressed against on the bimetal leaf (11), and the upper end of bimetal leaf (11) and yoke (12) are connected and fixed.