CN2899084Y

CN2899084Y - Spin-dle seizing mechanism of circuit breaker

Info

Publication number: CN2899084Y
Application number: CN 200620068842
Authority: CN
Inventors: 王华章; 周伟
Original assignee: Daqo Group Co Ltd
Current assignee: Jiangsu Daqo Kfine Electric Co Ltd
Priority date: 2006-01-25
Filing date: 2006-01-25
Publication date: 2007-05-09
Anticipated expiration: 2016-01-25

Abstract

The utility model belongs to low voltage electric equipment, relating to a spindle seizing mechanism of circuit breaker for low voltage circuit breaker, which comprises a moving contact arranged on the rotor axis basal body of the circuit breaker, wherein, the moving contact is provided with a swivel arm rotating around the spindle at the rotor axis center of the circuit breaker and the front end of the internal side of the swivel arm is disposed with a contact matching with a fixed contact; the rotor axis basal body of the circuit breaker is provided with a guiding groove arranged inside with a sliding axle; between the sliding axle and the rotor axis basal body of the circuit breaker a tension spring is connected to make the sliding axle press on the external side of the swivel arm and relatively slide thereon; the external side of the swivel arm is provided with a section of convex profiled wire. The utility model has the advantages of simple structure, convenient assembly and high service reliability.

Description

Switch Shaft Lock Mechanism

Technical field

The utility model belongs to low voltage electrical equipment, relates to a kind of Switch Shaft Lock Mechanism that is used for low-voltage circuit breaker.

Background technology

(circuit is generally and exchanges 50Hz in the common low-voltage circuit breaker course of work, rated operational voltage 400 is to 690V, rated operational current is to 630A), when bigger failed shorted electric current occurring in the circuit, before the operating mechanism action, moving contact overcomes contact pressure and should scold out in advance under the active force of electrodynamic repulsion force, and the rotating shaft transfixion.The effect of rotating axis locking mechanism is exactly, dynamic and static contact scold reach large opening after, make moving contact should rest on maximum position, under the effect of operating mechanism, thread off, reduce and fall to cause arc reignition to avoid moving contact to hinder short circuit current for some reason at release.The existing circuit breaker rotating axis locking mechanism generally has two kinds of forms: a kind of form is the moving contact cam structure, and it is when moving contact is scolded out, and blocks cam surface by the effect axle, and it blocks simple in structure, but reliability is lower; Another kind of form is a bar linkage structure, its effect connecting rod back and forth movement between the dead point, this form block the architecture complexity, technological requirement is very high, and difficulty is installed.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of simple in structure, easy to assembly, Switch Shaft Lock Mechanism that dependability is high is provided.

Rotating axis locking mechanism of the present utility model includes a moving contact that is installed on the breaker rotating axis matrix, and moving contact has the pivoted arm that can rotate around the mandrel at breaker rotating axis center, and the inner side edge front end of pivoted arm is provided with the contact that cooperates with fixed contact; The breaker rotating axis matrix is provided with gathering sill, is mounted with sliding axle in gathering sill, is connected with extension spring between sliding axle and the breaker rotating axis matrix, and sliding axle is pressed on the outer side edges of pivoted arm, and can be on the outer side edges of pivoted arm slide relative; One section projection outline line is arranged on the outer side edges of pivoted arm, and the curve of the peak rear side of projection outline line has a groove, and the curve of the peak front side of projection outline line is one section smoothed curve; Sliding axle is positioned at the groove of the peak rear side curve of pivoted arm outside projection outline line when dynamic and static contact is arranged in closure state, and when dynamic and static contact was positioned at open position, sliding axle was positioned at the peak front side of projection outline line.The end face of the extended rotating shaft matrix in the rear and front end of sliding axle, and the extension spring that is connected two sliding axle ends also is positioned at outside the end face of rotating shaft matrix, thus make extension spring and moving contact isolated.

The pivoted arm of above-mentioned moving contact can be symmetrically arranged with a pair of, and correspondingly the contact of pivoted arm front end, sliding axle, extension spring and gathering sill all have two groups, and the fixed contact that cooperates with moving contact also has two, thereby constitutes the breaker structure of double break point.

The utility model is simple in structure, easy for installation, reliable in action is good.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the utility model single-break structure embodiment when closure;

Fig. 2 is the sectional structure schematic diagram of the utility model single-break structure embodiment when disconnecting;

Fig. 3 is the sectional structure schematic diagram of the utility model double-breakpoint structure embodiment when closure;

Fig. 4 is the sectional structure schematic diagram of the utility model double-breakpoint structure embodiment when disconnecting;

Fig. 5 is a perspective view of the present utility model.

Embodiment

As shown in Figure 1 and Figure 2, this rotating axis locking mechanism includes breaker rotating axis matrix 1 and moving contact 2, and the pivoted arm 21 of the moving contact mandrel on the matrix 11 around the shaft rotates, and the inner side edge front end of pivoted arm 21 is to be used for the contact 22 that cooperates with fixed contact 3.Have gathering sill 12 on the rotating shaft matrix, being mounted with in the gathering sill can be along the sliding axle 4 of gathering sill slip, and sliding axle is connected on the rotating shaft matrix by extension spring 5, and is pressed on the outer side edges of pivoted arm 21.When dynamic and static contact closure, sliding axle 4 is pressed in the groove 231 of pivoted arm outer side edges upper process outline line 23 rear side curves, guarantees the contact pressure between the dynamic and static contact; When bigger failed shorted electric current occurring in the circuit, dynamic and static contact is scolded out by electrodynamic repulsion force, the pivoted arm 21 of moving contact begins to rotate, sliding axle 4 also surpasses peak along projection outline line 23 to front slide, drop on the smoothed curve 232 of projection outline line front side, moving contact is opened at maximum position can't be fallen after rise, threads off under the effect of operating mechanism at release, has prevented arc reignition; When threading off under the effect of operating mechanism at release, drive rotating shaft matrix 1 backward rotation, because of moving contact 2 is stopped by the arc control device module of circuit breaker, can not rotate with rotating shaft matrix 1, so returning along gathering sill 12 former road on projection outline line 23, sliding axle 4 causes initial position.

Among Fig. 1, the embodiment shown in Figure 2, moving contact has a pivoted arm 21, and it cooperates with a fixed contact 3, constitutes the structure of single-break.

And in Fig. 3, embodiment shown in Figure 4, moving contact has a pair of symmetrically arranged pivoted arm 21, and is corresponding with two fixed contacts 3, constitutes the structure of double break point, and simultaneously, moving contact passes through mounting hole 24 and cooperates with mandrel, makes two contacts all can effectively contact.

As shown in Figure 5, the end face of rotating shaft matrix is stretched out in the rear and front end of sliding axle 4, the extension spring 5 that is connected two sliding axle ends also is positioned at outside the end face of rotating shaft matrix, thereby make extension spring and moving contact isolated, extension spring is not directly contacted with moving contact, prevented that extension spring Yin Wendu from raising and the annealing inefficacy.

Claims

1, a kind of rotating axis locking mechanism, include a moving contact (2) that is installed on the breaker rotating axis matrix (1), moving contact has the pivoted arm (21) that can rotate around the mandrel (11) at breaker rotating axis center, the inner side edge front end of pivoted arm is provided with the contact (22) that cooperates with fixed contact (3), it is characterized in that: breaker rotating axis matrix (1) is provided with gathering sill (12), in gathering sill, be mounted with sliding axle (4), be connected with extension spring (5) between sliding axle and the breaker rotating axis matrix, sliding axle is pressed on the outer side edges of pivoted arm, and can be on the outer side edges of pivoted arm slide relative, one section projection outline line (23) is arranged on the outer side edges of pivoted arm.

2, rotating axis locking mechanism according to claim 1 is characterized in that: the curve of the peak rear side of projection outline line (23) has a groove (231), and the curve of the peak front side of projection outline line is one section smoothed curve (232); Sliding axle when dynamic and static contact is arranged in closure state (4) is positioned at the groove (231) of the peak rear side of projection outline line, and when dynamic and static contact was positioned at open position, sliding axle was positioned at the peak front side of projection outline line.

3, rotating axis locking mechanism according to claim 1 and 2, it is characterized in that: the pivoted arm (21) of moving contact (2) is provided with a pair of symmetrically, correspondingly the contact of pivoted arm front end (22), sliding axle (4), extension spring (5) and gathering sill (12) all have two groups, and the fixed contact that cooperates with moving contact (3) also has two.

4, rotating axis locking mechanism according to claim 3 is characterized in that: moving contact cooperates with mandrel (11) by mounting hole (24).

5, rotating axis locking mechanism according to claim 1 and 2 is characterized in that: the end face of rotating shaft matrix is stretched out in the rear and front end of sliding axle (4), and the extension spring (5) that is connected two sliding axle ends also is positioned at outside the end face of rotating shaft matrix.

6, rotating axis locking mechanism according to claim 5, it is characterized in that: the pivoted arm (21) of moving contact (2) is provided with a pair of symmetrically, correspondingly the contact of pivoted arm front end (22), sliding axle (4), extension spring (5) and gathering sill (12) all have two groups, and the fixed contact that cooperates with moving contact (3) also has two.

7, rotating axis locking mechanism according to claim 6 is characterized in that: moving contact cooperates with mandrel (11) by mounting hole (24).