CN205752065U - A Tripping Mechanism for Residual Current Operated Circuit Breaker - Google Patents

Abstract

The utility model discloses the tripping mechanism of a kind of residual current action breaker, including the pedestal on the housing being fixed on chopper, move and between iron core and dropout indication piece, be provided with dropout gangbar, dropout gangbar includes the first linkage portion, the second linkage portion and rotation section, rotation section is provided with rotating shaft dropout gangbar being pivoted on pedestal, first linkage portion is connected with dynamic iron core, the second linkage portion be provided with the dropout boss for exporting dropout trip operation, dropout boss stretches out and is connected with operating mechanism；One side of described first linkage portion is provided with the recess formed that caves inward, described dropout indication piece is provided with the conflict boss matched with recess, wherein dropout spring orders about dropout indication piece and stretches out outside dropout hole, conflict boss is inconsistent with the first linkage portion all the time, relative first linkage portion is slided, improve the motive force that dropout trace rotates, tripping force can be effectively improved, thus promote trip speed and stability.

Description

A Tripping Mechanism for Residual Current Operated Circuit Breaker

technical field

The utility model relates to the field of residual current operated circuit breakers, more specifically, it relates to a tripping mechanism of residual current operated circuit breakers.

Background technique

A residual current operated circuit breaker usually includes a contact device, an operating mechanism that controls the opening/closing of the contact device, and a tripping mechanism that controls the operating mechanism to perform tripping. The tripping mechanism is provided with a tripping shaft, and the tripping mechanism needs to pass The tripping of the circuit breaker can only be implemented by triggering the tripping axis to control the operating mechanism to perform tripping.

In the residual current action protector, the residual current action function of the product is realized by directly driving the circuit breaker part of the action through the tripping mechanism of the leakage module. During the action, the tripping module is required to operate quickly and have a large energy to ensure the residual current when leakage occurs. The action protector can be disconnected quickly and accurately, thereby cutting off the fault power supply and protecting the safety of personnel and equipment.

In this context, the tripping driving force provided by the leakage module has become a crucial parameter, which directly affects the reliability of the residual current protection function of the product. The driving force for tripping is provided by the energy storage device, and the driving force of the energy storage device depends on the parameters of the tripping coil and the moving and static iron core; the power supply voltage of the leakage module is unstable due to the use environment of the residual current operating protector , when a low voltage occurs, the driving force of the energy storage device of the leakage module may be relatively small. At this time, a leakage fault may occur, and the residual current action protector may not be able to cut off the fault power supply, or the cutoff may not be timely, which may cause a leakage accident. .

To solve the above problems, the parameters of the release cannot be increased blindly, otherwise the impact force of the electric release at the rated voltage will be too large, the life of the residual current-operated protector will be shortened, and the cost will also be reduced. waste.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a tripping mechanism for a residual current operated circuit breaker, which has a simple structure and can effectively increase the tripping force, thereby improving the tripping speed and stability.

In order to achieve the above object, the utility model provides the following technical solutions:

A tripping mechanism of a residual current operated circuit breaker, comprising a base fixed on the housing of the circuit breaker, an electromagnetic system, a moving iron core installed in the electromagnetic system, and a There are also a trip indicator and a trip spring that drives the trip indicator to pop up. The base is provided with a trip hole for the trip indicator to extend out of the base. The moving iron core and the trip indicator There is a trip linkage lever between them, and the trip linkage lever includes a first linkage part, a second linkage part and a rotating part, and the rotation part is provided with a rotating shaft for pivotally installing the trip linkage lever on the base, The first linkage part is connected with the moving iron core, and the second linkage part is provided with a tripping boss for outputting a tripping action, and the tripping boss extends outward and is linked with the operating mechanism; One side of the first linkage part is provided with a notch formed by inward depression, and the trip indicator is provided with a conflicting boss matched with the notch. Under normal working conditions, the moving iron core withstands the The first linkage part, the conflicting boss is placed in the notch to limit the movement of the tripping indicator; when the product has a leakage fault, the moving iron core pulls the tripping link to rotate in the tripping direction, and the tripping The boss pulls the operating mechanism, the circuit breaker trips and trips, and at the same time, the conflicting boss breaks away from the notch, and the tripping spring drives the tripping indicator to protrude out of the tripping hole.

The utility model is further provided that: the collision boss includes a collision head and a body of the collision boss fixed on the trip indicator, an inclined portion is provided between the body of the collision boss and the collision head, and the collision head matches the notch The end face is a circular arc surface.

The utility model further sets: the first linkage part, the second linkage part and the rotating part are integrated, the rotating part is placed between the first linkage part and the second linkage part, and the first linkage part and the second linkage part The included angle of the linkage part is greater than or equal to 90 degrees.

The utility model has beneficial effects: under normal working conditions, under the action of the electromagnetic system, the moving iron core will withstand the first linkage part of the trip linkage rod, and the notch of the first linkage part cooperates with the conflicting boss to lock Trip indicator; when a leakage fault occurs in the product, the electromagnetic system generates a large enough magnetic field to attract the moving iron core, and the moving iron core pulls the trip linkage lever to rotate in the tripping direction, and the trip boss pulls the operating mechanism , the circuit breaker trips and trips, and at the same time, the conflicting boss breaks away from the notch, and the tripping spring drives the tripping indicator out of the tripping hole. After the tripping indicator pops up, the tripping linkage lever cannot return to its original position. At this time, the circuit breaker is locked by the trip linkage rod and cannot be closed. It is necessary to reset the trip indicator and confirm that the trip indicator is locked by the trip linkage lever before it can be closed normally. The structure design is simple and reasonable;

The tripping spring drives the tripping indicator to protrude out of the tripping hole, and the collision boss is always in conflict with the first linkage part, and slides relative to the first linkage part, increasing the driving force of the trip linkage rod rotation, which can effectively improve the tripping force. buckle force, thereby improving tripping speed and stability;

The notch and the conflicting boss cooperate with each other to realize the connection and separation of the first linkage part and the trip indicator. Since the notch is formed by an inward depression on one side of the first linkage part, it is convenient for the formation and manufacture of the notch. It is also convenient to install or disassemble the first linkage part and the trip indicator;

The tripping boss extends outward and is linked with the operating mechanism. The tripping boss is inserted into the operating mechanism of the circuit breaker instead of the transmission shaft pin and is linked with it. Stainless steel cylinders are generally used as the transmission shaft pin on the market. The shaft pin is inserted into the lock of the circuit breaker, which reduces parts and facilitates assembly, and also improves the transmission efficiency of the trip linkage lever.

Description of drawings

Fig. 1 is a structural schematic diagram of a tripping mechanism of a residual current operated circuit breaker of the present invention;

Fig. 2 is a sectional view of a tripping mechanism of a residual current operated circuit breaker in a normal state of the utility model;

Fig. 3 is a cross-sectional view of a tripping mechanism of a residual current operated circuit breaker in the tripped state of the utility model;

Fig. 4 is a structural schematic diagram of the tripping linkage;

Fig. 5 is a schematic structural diagram of a trip indicator.

Explanation of Reference Signs: 1. Base; 2. Electromagnetic System; 21. Moving Iron Core; 3. Trip Indicator; 31. Interference Boss; 311. Interference Head; 312. Interference Boss Body; 313. Inclined Part 4, tripping spring; 5, tripping linkage lever; 51, first linkage part; 511, notch; 52, second linkage part; 521, tripping boss; 53, rotating part.

detailed description

Referring to accompanying drawings 1 to 5, the tripping mechanism of a residual current operated circuit breaker of the present utility model will be further described in detail.

A tripping mechanism for a residual current operated circuit breaker, comprising a base 1 fixed on the housing of the circuit breaker, the base 1 is provided with an electromagnetic system 2 and a moving iron core 21 installed in the electromagnetic system 2;

The base 1 is also provided with a trip indicator 3 and a trip spring 4 that drives the trip indicator 3 to pop up, and the base 1 is provided with a tripping mechanism for the trip indicator 3 to extend out of the base 1. hole, a tripping linkage lever 5 is provided between the moving iron core 21 and the trip indicator 3, and the tripping linkage lever 5 includes a first linkage part 51, a second linkage part 52 and a rotating part 53. The rotating part 53 is provided with a rotating shaft for pivotally installing the trip linkage lever 5 on the base 1, the first linkage part 51 is connected with the moving iron core 21, and the second linkage part 52 is provided for output tripping The tripping boss 521 for the tripping action, the tripping boss 521 extends outward and is linked with the operating mechanism; one side of the first linkage part 51 is provided with a notch 511 formed by inward depression, the The trip indicator 3 is provided with a conflicting boss 31 that matches the notch 511. Under normal working conditions, the moving iron core 21 withstands the first linkage part 51, and the conflicting boss 31 is placed in the notch 511. Inside, it is used to limit the movement of the trip indicator 3; when a leakage fault occurs in the product, the moving iron core 21 pulls the trip linkage lever to rotate in the trip direction, and the trip boss 521 pulls the operating mechanism, and the circuit breaker trips. The button trips, and at the same time, the conflicting boss 31 breaks away from the notch 511, and the tripping spring 4 drives the tripping indicator 3 out of the tripping hole.

The operating mechanism and the electromagnetic system 2 are prior art and will not be repeated here, wherein the electromagnetic system 2 is provided with a reaction force spring; during the tripping process from the untripped state to the tripped state, the moving iron The tripping force of the core 21 overcomes the elastic force of the reaction force spring and drives the push rod to rotate in the tripping direction to unlock the trip indicator 3 , and the trip spring 4 releases energy and drives the trip indicator 3 to pop up.

Wherein the conflicting boss 31 includes a resisting head 311 and a resisting boss body 312 fixed on the trip indicator 3 , an inclined portion 313 is provided between the resisting boss body 312 and the resisting head 311 , and the resisting head 311 and The matching end face of the notch 511 is an arc surface, and the collision boss 31 stretches into the notch 511 and is locked by the notch 511. The collision boss 31 is provided with an inclined portion 313, and the inclined surface of the inclined portion 313 can be used to better The locking and tripping linkage lever, the end face of the contact head 311 matching the notch 511 is a circular arc surface, so that the contact head 311 can slide into the notch 511 more easily.

The first linkage part 51, the second linkage part 52 and the rotating part 53 are integrally arranged, the rotation part 53 is placed between the first linkage part 51 and the second linkage part 52, and the first linkage part 51 and the second linkage part The included angle of the two linkage parts 52 is greater than or equal to 90d degrees so that the moving iron core can better pull the tripping linkage rod 5 to rotate, and it is also convenient for the tripping indicator 3 to protrude out of the tripping hole under the action of the tripping spring.

Working principle: Under normal working conditions, under the action of the electromagnetic system 2, the moving iron core 21 will withstand the first linkage part 51 of the trip linkage rod, and the notch 511 of the first linkage part 51 cooperates with the conflicting boss 31 , lock the trip indicator 3; when the product has a leakage fault, the electromagnetic system 2 generates a magnetic field large enough to attract the moving iron core 21, and the moving iron core 21 pulls the trip linkage lever to rotate in the tripping direction, and the tripping The buckle boss 521 pulls the operating mechanism, the circuit breaker trips and trips, and at the same time the conflicting boss 31 breaks away from the notch 511, the trip spring 4 drives the trip indicator 3 out of the trip hole, and the trip indicator 3 pops out Finally, the trip linkage lever cannot return to the original position. At this time, the circuit breaker is locked by the trip linkage lever and cannot be closed. It is necessary to reset the trip indicator 3 and confirm that it is locked and tripped by the trip linkage lever. The indicator 3 can be closed normally, and the structure design is simple and reasonable;

The tripping spring 4 drives the tripping indicator 3 out of the tripping hole, and the collision boss 31 is always in conflict with the first linkage part 51 and slides relative to the first linkage part 51 to increase the driving force for the rotation of the tripping linkage lever. , can effectively increase the tripping force, thereby improving the tripping speed and stability;

The notch 511 cooperates with the conflicting boss 31 to realize the connection and separation of the first linkage part 51 and the trip indicator 3. Since the notch 511 is formed by an inward depression on one side of the first linkage part 51, it is convenient The notch 511 is formed to facilitate the installation or disassembly of the first linkage part 51 and the trip indicator 3;

The tripping boss 521 extends outward and is linked with the operating mechanism. The tripping boss 521 is inserted into the operating mechanism of the circuit breaker instead of the transmission shaft pin and is connected with it in linkage. Among them, stainless steel cylinders are generally used as the transmission shaft pin in the market. , the transmission shaft pin is inserted into the lock of the circuit breaker, reducing the number of components, facilitating assembly, and improving the transmission efficiency of the tripping linkage 5 at the same time.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (3)

1. A tripping mechanism of a residual current operated circuit breaker, comprising a base fixed on the housing of the circuit breaker, the base is provided with an electromagnetic system, a moving iron core installed in the electromagnetic system, the base The seat is also provided with a trip indicator and a trip spring that drives the trip indicator to pop up. The base is provided with a trip hole for the trip indicator to extend out of the base. The moving iron core and the trip A tripping link is provided between the indicator pieces, and the tripping link includes a first linking part, a second linking part and a rotating part, and the turning part is provided with a pivotal mounting mechanism for the tripping linking bar on the base. The rotating shaft, the first linkage part is connected with the moving iron core, which is characterized in that: The second linkage part is provided with a tripping boss for outputting a tripping action, and the tripping boss extends outward and is linked with the operating mechanism; One side of the first linkage part is provided with a notch formed by inward depression, and the trip indicator is provided with a conflicting boss matched with the notch, Under normal working conditions, the moving iron core bears against the first linkage part, and the conflicting boss is placed in the notch to limit the movement of the trip indicator; when a leakage fault occurs in the product, the moving iron core pulls The tripping linkage lever rotates in the tripping direction, the tripping boss pulls the operating mechanism, the circuit breaker trips and trips, and at the same time, the conflicting boss breaks away from the notch, and the tripping spring drives the tripping indicator to protrude out of the tripping hole . 2. The tripping mechanism of a residual current operated circuit breaker according to claim 1, wherein the interference boss includes a collision head and a collision boss body fixed on the trip indicator, and the collision boss An inclined part is provided between the main body and the contact head, and the end face of the contact head matched with the notch is an arc surface. 3. The tripping mechanism of a residual current operated circuit breaker according to claim 1 or 2, characterized in that: the first linkage part, the second linkage part and the rotating part are integrated, and the rotating part is placed Between the first linkage part and the second linkage part, the included angle between the first linkage part and the second linkage part is greater than or equal to 90 degrees.