CN101587802B

CN101587802B - Rapid-releasing breaker

Info

Publication number: CN101587802B
Application number: CN2009100998712A
Authority: CN
Inventors: 许利战; 祁卫华
Original assignee: Delixi Electric (Ningbo) Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2012-02-22
Anticipated expiration: 2029-06-18
Also published as: CN101587802A

Abstract

The invention discloses a rapid-releasing breaker, comprising a shell, a wiring base, a bimetallic sheet, a contact component, a switch component, and an electromagnetic component which are sequentially provided in the shell. The contact component includes a static contact, a movable contact arm, a releasing member, a locking member and a spring. The switching component includes a rotating handle, a transmission connecting rod and a torsional spring. The transmission connecting rod is matched with the locking member and the releasing member to form the releasing and locking action. The invention further includes a transmission member that is movably arranged between the releasing member and the movable iron core of the electromagnetic component. A head end of the transmission member is rotatably installed in the shell through a pin shaft. The transmission member is provided with a pushing raised head that is matched with transmission member in a pushing way with respect to the head end of the movable iron core. A tail end of the releasing member is provided with a pushing head that is matched with the pushing part in a pushing way. The transmission member is provided with a pushing raised head that is matched with the movable contact arm in a pushing way. The invention has rapid brake separation, fast arc extinction and high safety.

Description

A kind of circuit breaker of rapid-releasing

Technical field

The present invention relates to the low-voltage electrical apparatus of a kind of overcurrent protection and short-circuit protection, specifically be meant a kind of rapid-releasing circuit breaker

Background technology

At present; The circuit breaker primary structure of overcurrent or short-circuit protection that is used for low-voltage circuit is following: be disposed with junction block, bimetal leaf, contact assembly, switch module, electromagnetic assembly at shell, between the contact end of bimetal leaf and electromagnetic assembly also and be provided with arc-extinguish chamber, contact assembly includes fixed contact, moving contact, dropout part, snap close piece and spring, switch module includes turning handle, kinematic link and torsion spring; And kinematic link matches with snap close piece and dropout part to link and constitutes the action of dropout snap close; The circuit breaker of this traditional structure is when overcurrent or short circuit occurring, and moving iron core head end ejection dropout part rotates, and this dropout part rotation makes threads off between kinematic link and the snap close piece; Thereby moving contact and fixed contact separating brake feasible and the snap close piece interlock; But the circuit breaker of this structure, because the separating brake of moving contact and fixed contact is to need the power of moving iron core behind dropout part, snap close piece, passing to fixed contact, the power transmission stroke is longer; Opening velocity is rapid inadequately; Cause electric arc to be not easy moment and extinguish, burn out case for circuit breaker and contact easily, and opening velocity is slower; Immediate current is excessive in the circuit breaker, makes circuit breaker have the potential safety hazard of blasting.In addition, the circuit breaker of this structure closes a floodgate under the effect of contact pressure spring after moving contact is scolded out by electrodynamic repulsion force once more, and the separating brake performance is good inadequately, is prone to bring accident potential.

Summary of the invention

The objective of the invention is in order to overcome the shortcoming and defect that prior art exists, and provide a kind of separating brake rapid, and can prevent the circuit breaker of a kind of rapid-releasing that separating brake stability that dynamic/static contact closes a floodgate once more is good behind the separating brake.

For realizing above-mentioned purpose; Technical scheme of the present invention is; Comprise shell and set gradually therein junction block, bimetal leaf, contact assembly, switch module, electromagnetic assembly are arranged, between the contact end of bimetal leaf and electromagnetic assembly also and be provided with arc-extinguish chamber; Contact assembly includes fixed contact, acting arm, dropout part, snap close piece and spring; Switch module includes turning handle, kinematic link and torsion spring thereof, and described kinematic link and snap close piece and dropout part are linked and constitute the action of dropout snap close, are provided with pull bar between described dropout part and the bimetal leaf; It is characterized in that: also include driving member; This driving member is movably arranged between the moving iron core of dropout part and electromagnetic assembly, and the head end of this driving member is installed on the housing through bearing pin is rotatable, and the head end corresponding to moving iron core on this driving member is provided with the ejection part that ejection with it cooperates; The tail end of described dropout part is provided with the ejection head that cooperates with this ejection part ejection, and described driving member is provided with the ejection plush copper that cooperates with the acting arm ejection.Through this setting, when overcurrent or short circuit occurring, the moving iron core of electromagnetic mechanism ejects; Ejection driving member, driving member pushing tow dropout part again rotate completion dropout separating brake, because the ejection plush copper of driving member cooperates with movable contact wall pushing tow; Therefore when moving iron core head end withstood driving member, this driving member also withstood the movable contact wall towards the direction of separating brake, after preventing to be scolded out by electrodynamic repulsion force because of acting arm; Under the effect of contact pressure spring, move to fixed contact once more; Therefore not only opening velocity is fast in the present invention, and can prevent behind the separating brake that dynamic/static contact from closing a floodgate once more, and this driving member also must safe distance with separating between the moving contact of movable contact wall and the fixed contact in addition; Can make that electric arc extinguishes easily, solve the problem generation that conventional circuit breaker causes burning out circuit breaker because electric arc is difficult to extinguish fast even blasts.

Further being provided with is that the ejection part of described driving member is a column shape, and this ejection part is positioned on the housing through alignment pin slippingly, and described housing is provided with the slippage slot adaptive with this alignment pin.Through this setting, make that the stability of rotation of driving member is better, make with the rotational stability of the dropout part of driving member interlock also better relatively.

Further being provided with is that described alignment pin passes housing through slippage slot, and constitutes being linked of multipole circuit breaker on the ejection part of the driving member of the outer end of this alignment pin next utmost point circuit breaker of penetrating into and adorning.Through this setting, when with a plurality of circuit breakers and folding addition multipole circuit breaker, only need to carry out through alignment pin and driving member multipole between combined operation get final product, the required power of threading off is less, the degree of crook of bimetal leaf when having reduced overlond trip.

Further setting is that the head end of described moving iron core is the umbrella shape cap-like structure.This setting, the lifting surface area that the head end of feasible moving iron core and the pushing tow between the driving member cooperate, more reliable and more stable.

Below in conjunction with Figure of description and embodiment the present invention is done further introduction.

Description of drawings

Fig. 1 specific embodiment of the invention structural representation;

The positive visual angle of Fig. 2 contact assembly part-structure of the present invention sketch map;

Visual angle, Fig. 3 contact assembly part-structure back side of the present invention sketch map;

Fig. 4 specific embodiment of the invention driving member stereogram.

Embodiment

Embodiment of the present invention shown in Fig. 1-4, comprise shell 1 and set gradually therein junction block 2, bimetal leaf 3, contact assembly 4, switch module 5, electromagnetic assembly 6 are arranged, between the contact end of bimetal leaf 3 and electromagnetic assembly 6 also and be provided with arc-extinguish chamber 7, contact assembly 4 includes fixed contact 41, acting arm 42, dropout part 43, snap close piece 44 and spring 45; Switch module 5 includes turning handle 51, kinematic link 52 and torsion spring 53 thereof, and described kinematic link 52 is linked with snap close piece 44 and dropout part 43 and constitutes the action of dropout snap close, is provided with pull bar 46 between described dropout part 43 and the bimetal leaf 3; In addition; Also include driving member 8, this driving member 8 is movably arranged between the moving iron core 61 of dropout part 43 and electromagnetic assembly 6, and the head end of this driving member 8 is through bearing pin 81 rotatable being installed on the housing 1; Head end corresponding to moving iron core 61 on this driving member 8 is provided with the ejection part 82 that ejection with it cooperates; The tail end of described dropout part 43 is provided with the ejection that cooperates with 82 ejections of this ejection part 431, and described driving member 8 is provided with the ejection plush copper 83 that cooperates with acting arm 42 ejections, the present invention; When overload current or short circuit occurring; The moving iron core 61 of electromagnetic assembly 6 ejects, and ejection driving member 8, driving member 8 pushing tow dropout part 43 again rotate completion dropout separating brake; Because the ejection plush copper 83 of driving member 8 cooperates with movable contact wall 42 pushing tows; Therefore when moving iron core 61 head ends withstood driving member 8, this driving member 8 also withstood movable contact wall 42 towards the direction of separating brake, after preventing to be scolded out by electrodynamic repulsion force because of acting arm 42; Under the effect of contact pressure spring, move to fixed contact 41 once more; Therefore not only opening velocity is fast in the present invention, and can prevent behind the separating brake that dynamic/static contact from closing a floodgate once more, and this driving member 8 also must safe distance with separating between the moving contact 421 of movable contact wall 42 and the fixed contact in addition; Can make that electric arc extinguishes easily, solve the problem generation that conventional circuit breaker causes burning out circuit breaker because electric arc is difficult to extinguish fast even blasts.

This execution mode; The ejection part 82 of described driving member 8 is a column shape; And this ejection part 82 is positioned on the housing 1 through alignment pin 821 slippingly, and described housing 1 is provided with the slippage slot 11 adaptive with this alignment pin, so; Make that the stability of rotation of driving member 8 is better, make with the rotational stability of the dropout part 43 of driving member 8 interlocks also better relatively.In addition; The described alignment pin 821 of this execution mode passes housing 1 through slippage slot 11, and constitutes being linked of multipole circuit breaker on the ejection part 82 of the driving member 8 of the outer end of this alignment pin 821 next utmost point circuit breaker of penetrating into and adorning, so; When with a plurality of circuit breakers and folding addition multipole circuit breaker; Only need to carry out through alignment pin 821 and driving member 8 multipole between combined operation get final product, the required power of threading off is less, the degree of crook of bimetal leaf 3 when having reduced overlond trip.

This execution mode is more reliable and more stable in order to make that head end and the pushing tow between the driving member 8 of moving iron core 61 cooperate, and the head end of described moving iron core 61 is the umbrella shape cap-like structure.

Claims

1. the circuit breaker of a rapid-releasing; Comprise shell and set gradually therein junction block, bimetal leaf, contact assembly, switch module, electromagnetic assembly are arranged, between the contact end of bimetal leaf and electromagnetic assembly also and be provided with arc-extinguish chamber; Contact assembly includes fixed contact, acting arm, dropout part, snap close piece and spring; Switch module includes turning handle, kinematic link and torsion spring thereof; Described kinematic link and snap close piece and dropout part are linked and constitute the action of dropout snap close; Be provided with pull bar between described dropout part and the bimetal leaf, it is characterized in that: also include driving member, this driving member is movably arranged between the moving iron core of dropout part and electromagnetic assembly; And the head end of this driving member is installed on the housing through bearing pin is rotatable; Head end corresponding to moving iron core on this driving member is provided with the ejection part that ejection with it cooperates, and the tail end of described dropout part is provided with the ejection head that cooperates with this ejection part ejection, and described driving member is provided with the ejection plush copper that cooperates with the acting arm ejection.

2. the circuit breaker of rapid-releasing according to claim 1; It is characterized in that: the ejection part of described driving member is a column shape; And this ejection part is positioned on the housing through alignment pin slippingly, and described housing is provided with the slippage slot adaptive with this alignment pin.

3. the circuit breaker of rapid-releasing according to claim 2; It is characterized in that: described alignment pin passes housing through slippage slot, and constitutes being linked of multipole circuit breaker on the ejection part of the driving member of the outer end of this alignment pin next utmost point circuit breaker of penetrating into and adorning.

4. the circuit breaker of rapid-releasing according to claim 3, it is characterized in that: the head end of described moving iron core is the umbrella shape cap-like structure.