CN203644696U

CN203644696U - Plastic shell breaker having isolation function

Info

Publication number: CN203644696U
Application number: CN201320858469.XU
Authority: CN
Inventors: 耿翔宇; 方超; 杜战; 张进; 戴罡
Original assignee: Daqo Group Co Ltd
Current assignee: Nanjing Daqo Electrical Institute Co Ltd
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-06-11
Anticipated expiration: 2023-12-25

Abstract

The utility model discloses a plastic shell breaker having an isolation function. The plastic shell breaker comprises a shell and an operating mechanism in the shell; an upper connecting rod, a lower connecting rod and a lever are disposed in the operating mechanism; the plastic shell breaker further comprises a baffle plate; and the upper connecting rod is provided with at least one shaft hole, a connecting piece is disposed in the shaft hole, two ends of the baffle plate are respectively and movably connected with the connecting piece and a shaft which is shared by the upper and lower connecting rods, the lever is further provided with a limit structure which limits the lever to continuously move relatively to the baffle plate in the contact fusion welding case, and the baffle plate is C-shaped. When the operating mechanism closed and opened normally, a contact system can move normally, so the designed limit structure cannot obstruct closing and opening actions of the breaker. When the contact fusion welding occurs, the breaker contact is deadly limited, so the C-shaped baffle plate cannot move any longer. The handle is pushed at this moment, a collision occurs between the C-shaped baffle plate and the limit structure on the lever after the handle runs for a certain distance, so the handle is stopped to move to a disconnection position, and the effect of the isolation function is achieved finally.

Description

A kind of breaker of plastic casing with isolation features

Technical field

The utility model relates to a kind of breaker of plastic casing with isolation features.Particularly, relate in the situation that contact of breaker, because of abnormal conditions, melting welding occurs, stop the operating mechanism of handle motion to the isolation features of open position.

Background technology

Breaker of plastic casing is a kind of device for switching that is used for distributing electric energy and protection circuit and power-supply device in distribution network that is applied to, and relies on the closed and disconnected of dynamic and static contact to realize switching on and off of electric current.In the time that the electric current in circuit breaker is excessive, likely can there is the situation of melting welding in contact, makes circuit breaker keep the state of connecting always.If now promote circuit breaker handle to open position, circuit breaker handle indicating circuit is in off-state, but in fact circuit, still in on-state, will be indicated the unfounded Circuits System that causes because of circuit breaker like this and damage or casualties.For fear of the generation of above-mentioned situation, designer has added isolation features in circuit breaker design, make people in the time of contact of breaker melting welding to shift circuit breaker handle onto open position, thereby alert circuit breaker breaks down.

The breaker of plastic casing of selling on the market now, adopts the project organization of Schneider circuit breaker isolation features mostly, makes two structures with some bendings in lever one side, utilizes and comes spacing through an axle of upper connecting rod.In the time that circuit breaker normally disconnects, the structure of adding and described axle can be avoided, and do not have each other interference; In the time of contact melting welding, because that root axle no longer moves, lever understands in motion process and described axle bumps and stop motion, thereby reaches the object of isolation.The deficiency of this scheme is: on lever, adding structure can increase the complexity of technique, increase manufacturing cost, in order to step down to the structure of adding, it is very high that operating mechanism must do simultaneously, will increase like this height of circuit breaker, appearance and practicality are reduced.

Utility model content

The problems referred to above that exist for breaker of plastic casing in prior art, the utility model provides a kind of breaker of plastic casing with isolation features, can reach good isolation effect and not affect the normal divide-shut brake performance of circuit breaker.

In order to achieve the above object, the scheme that the utility model adopts is:

A kind of breaker of plastic casing with isolation features, comprise the operating mechanism in housing and housing, described operating mechanism inside is provided with connecting rod, lower link and lever, also comprise baffle plate, on upper connecting rod, be provided with at least one axis hole, in described axis hole, be provided with connector, the two ends of described baffle plate are flexibly connected with described connector and the shared axle of upper and lower strut respectively, are also provided with the position limiting structure that limits the relatively described baffle plate of lever and continue motion in contact melting welding situation on described lever.

As further improvement of the utility model, described baffle plate is " C " type.

As further improvement of the utility model, described connector is an axle through upper connecting rod upper shaft hole, pass the axle of upper connecting rod, described position limiting structure is one to be fixed on the projection on lever, and projection is less than the distance of baffle plate end to the shared axle of upper and lower strut to the distance of the shared axle of upper and lower strut.

Adopt after above technical scheme, the beneficial effect that the utility model reaches is:

In the time of the normal divide-shut brake of operating mechanism, because contact system can proper motion, designed position limiting structure can not hinder the divide-shut brake action of circuit breaker.In the time of contact melting welding, contact of breaker will be limit extremely, and " C " type baffle plate is no longer moved.Now driving handle, we can find that handle moves after a segment distance, " C " type baffle plate by with lever on position limiting structure bump, thereby stop handle motion to open position, finally reach the effect of isolation features.

Accompanying drawing explanation

Fig. 1 is the structural representation of " C " type baffle plate in the utility model;

Fig. 2 is the structural representation of circuit breaker in the time of handle locking position.

In figure: 1, handle; 2, lever; 3, upper connecting rod; 4, pass the axle of upper connecting rod; 5, baffle plate; 6, the shared axle of upper and lower strut; 7, moving contact; 8, fixed contact; 9, lower link; 10, rotating shaft; 11, position limiting structure.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The structure of a kind of breaker of plastic casing with isolation features of the utility model as shown in Figure 2, comprise the operating mechanism in housing and housing, operating mechanism inside is provided with connecting rod 3, lower link 9 and lever 2, also comprise baffle plate 5, on upper connecting rod 3, be provided with at least one axis hole, in axis hole, be provided with connector, the two ends of baffle plate 5 are flexibly connected with described connector and the shared axle 6 of upper and lower strut respectively, make the motion of baffle plate 5 and upper connecting rod 3 can keep synchronous, on lever 2, be also provided with the position limiting structure 11 that limits the relatively described baffle plate 5 continuation motions of lever 2 in contact melting welding situation.

As a kind of preferred structure, the structure of baffle plate 5 as shown in Figure 1, is " C " type.

Connector is preferably an axle through upper connecting rod 3 upper shaft holes, pass the axle 4 of upper connecting rod, position limiting structure 11 is preferably a projection being fixed on lever 2, and projection is less than the distance of baffle plate 5 ends to the shared axle 6 of upper and lower strut to the distance of the shared axle 6 of upper and lower strut.

The course of work of a kind of breaker of plastic casing with isolation features of the utility model is as follows:

Position when A, B, C represent respectively handle motion to closure, locking, off-state in Fig. 2.

The utility model is connected with " C " type baffle plate with a shared axle of upper and lower strut with an axle through upper connecting rod, and in the time that operating mechanism moves, the motion of " C " type baffle plate and upper connecting rod is consistent.

In the time of the normal divide-shut brake of circuit breaker, because moving contact 7 can normally rotate with rotating shaft 10, normal deciliter of moving contact 7 and fixed contact 8 energy, " C " type baffle plate and lever be energy proper motion all, position limiting structure can not hinder the action of mechanism, can not affect the divide-shut brake performance of mechanism simultaneously yet.

In the time of contact melting welding, driving handle 1 makes breaker open operation, and due to contact melting welding, rotating shaft 10 is not rotated, and by the connection of lower link, connecting rod can not be moved, and " C " type baffle plate will can not move.Now, handle still can continue along with promotion motion, and the position limiting structure of setting can collide with " C " type baffle plate in the position of B shown in Fig. 2, stops handle 1 to arrive open position, and alert circuit breaker breaks down, and plays the effect of isolation features.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims

1. one kind has the breaker of plastic casing of isolation features, comprise the operating mechanism in housing and housing, described operating mechanism inside is provided with connecting rod (3), lower link (9) and lever (2), it is characterized in that: also comprise baffle plate (5), on upper connecting rod (3), be provided with at least one axis hole, in described axis hole, be provided with connector, the two ends of described baffle plate (5) are flexibly connected with described connector and the shared axle (6) of upper and lower strut respectively, on described lever (2), be also provided with the position limiting structure (11) that limits the relatively described baffle plate of lever (2) (5) continuation motion in contact melting welding situation.

2. the breaker of plastic casing with isolation features according to claim 1, is characterized in that: described baffle plate (5) is " C " type.

3. the breaker of plastic casing with isolation features according to claim 1 and 2, it is characterized in that: described connector is an axle through upper connecting rod (3) upper shaft hole, pass the axle (4) of upper connecting rod, described position limiting structure (11) is one to be fixed on the projection on lever (2), and projection is less than the distance of baffle plate (5) end to the shared axle of upper and lower strut (6) to the distance of the shared axle of upper and lower strut (6).