CN101640146A

CN101640146A - Tripping device of circuit breaker

Info

Publication number: CN101640146A
Application number: CN200910056260A
Authority: CN
Inventors: 张晓敏; 张敏海; 张书瑞; 李军; 王芳清; 程国星
Original assignee: SHANGHAI ROGY ELECTRICITY CO Ltd
Current assignee: SHANGHAI ROGY ELECTRICITY CO Ltd
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2010-02-03
Anticipated expiration: 2029-08-11
Also published as: CN101640146B

Abstract

The invention discloses a tripping device of a circuit breaker. The device comprises an operating mechanism and a trip. The operating mechanism comprises an operating handle and a tripping member capable of tripping the operating mechanism; the trip comprises a locking bar which is hinged in the middle, one end of the locking bar is connected with a draw bar, the other end is equipped with a firsthook, a jumping fastening bar capable of sliding in straight line is connected between the operating mechanism and the trip, a front end of the jumping fastening bar is equipped with a second hook which is buckled with the first hook on the locking bar, a rear end of the jumping fastening bar can contact with the operating handle, the jumping fastening bar is also equipped with a thrust arm opposite to the tripping member, and the trip also comprises a spring connected with the jumping fastening bar. The jumping fastening bar has two functions of jumping fastening the operating mechanism andresetting the trip, so no reset bar is needed for the circuit breaker using the tripping device, the circuit breaker structure is further simplified, and the use is more convenient.

Description

The tripping mechanism of circuit breaker

Technical field

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

Background technology

Circuit breaker is as a kind of contactor, obtained using widely because of it can transship at circuit, circuit is carried out reliable protection under the short circuit, situation such as under-voltage.Circuit breaker generally comprises the parts such as unit box, operating mechanism and release that drive fixed contact, when killer switch needs closure, acts on operating mechanism by external force, and moving contact and fixed contact are contacted, and circuit breaker just is in "on" position, circuit communication.In circuit, break down, as when overload current or short circuit current occurring, release will carry out delayed releasing or instantaneous trip, and the tripping mechanism of release will act on the operating mechanism, by dynamic and static contact is thrown off, make the circuit breaker trip outage.

Circuit breaker hinder for some reason need to tip horizontal reset in more earlier after the tripping operation outage after, just can close a floodgate again.And in the circuit breaker of some big shell frame electric currents, often because structural reason makes that the distance between operating mechanism and the release is longer, just can reset so need between operating mechanism and release, increase a release link.Disclose a kind of tripping mechanism of residual current circuit breaker as Chinese utility model patent ZL200620104910.5, in this tripping mechanism, just include the restoring board that is used for reset response, the shortcoming that adopts the tripping mechanism of this structure is exactly that structure is comparatively complicated, and when closing a floodgate again, need at first reset, use cumbersome.

Summary of the invention

At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of breaker tripping mechanism of new structure, this breaker tripping mechanism resets without release link, has simplified the structure of tripping mechanism, makes the structure of circuit breaker more simple.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A kind of tripping mechanism of circuit breaker comprises operating mechanism and release, the dropout part that described operating mechanism comprises operating grip and operating mechanism is threaded off; Described release comprises locking-bar hinged in the middle of, one end of locking-bar is connected with draw bar, the other end is provided with first hook, be connected with between described operating mechanism and the release one can linear slide the tripping bar, the front end of tripping bar is provided with first on second hook and the locking-bar and links up with hasp mutually, the rear end of tripping bar can contact with described operating grip, also is provided with a push and block arm relative with described dropout part on the tripping bar, comprises that also a spring is connected with described tripping bar.

Preferably, described draw bar is hinged on first rotating shaft, also is provided with a swing arm on the draw bar, and described swing arm is connected with described locking-bar.

Preferably, described locking-bar strand is propped up in second rotating shaft, is with torsion spring in described second rotating shaft.

Preferably, described tripping bar is provided with two parallel straight line chutes, is provided with fixing sliding pin in the described straight line chute.

Preferably, described spring is a torsion spring.

Preferably, described operating grip is provided with the push and block piece, and described push and block piece is relative with an end of described tripping bar.

Preferably, the back side of described first hook, second hook is provided with the inclined-plane that cooperatively interacts.

Technique scheme has following beneficial effect: but in this scheme tripping bar linear slide, when the tripping bar can make the operating mechanism tripping when dropout part on the operating mechanism contacts, reverse when mobile when the tripping bar, can finish resetting of release with the locking-bar hasp on the release.This tripping bar has the operating mechanism of making tripping and makes the release two kinds of functions that reset, and therefore uses the circuit breaker of this tripping mechanism can no longer need to be provided with release link again, makes the structure of circuit breaker more simple, and it is also more convenient to use.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention

Embodiment

Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.

As shown in Figure 1, this breaker tripping mechanism comprises release 10 and operating mechanism 20, comprises draw bar 1 and locking-bar 2 in the release 10, comprises parts such as dropout part 4, operating grip 5, snap close piece 6 and tripping part 7 in the operating mechanism 20.Release 10 is connected by a tripping bar 3 with operating mechanism 20.

Wherein draw bar 1 is hinged in first rotating shaft 11, also is provided with a swing arm 12 on the draw bar 1, and draw bar 1 can rotate around first rotating shaft 11.The centre of snap close piece 2 is hinged in second rotating shaft 23, be with a torsion spring 24 in second rotating shaft 23, torsion spring 24 acts on and produces a clockwise torque on the snap close piece 2, one end 22 of snap close piece 2 is leant with swing arm 12, second hook, 31 hasps of front end on the other end first hook 21 and the tripping bar 3, the back side of first hook, 21 and second hook 31 is the inclined-plane that cooperatively interacts.

The rear end 32 of tripping bar 3 is relative with a push and block piece 51 on the operating grip 5, and push and block piece 51 can contact with the rear end 32 of tripping bar 3.Also be provided with two parallel

straight line chutes

33,34 on the tripping bar 3, be respectively equipped with a

fixing sliding pin

35,36 in the

straight line chute

33,34, this tripping bar 3 can slide in the chute direction of the supporting role lower edge of sliding

35,36 straight line chute.Also be provided with a push and block arm 37 on the tripping bar 3, push and block arm 37 and dropout part 4 are relative and can contact with it.Tripping bar 3 is connected with a spring 8, and spring 8 makes tripping bar 3 make circuit breaker trip by triggering dropout part 4 for tripping bar 3 provides power, and back-moving spring 8 can be torsion spring, extension spring or stage clip, and back-moving spring 8 is a torsion spring in the present embodiment.

The circuit breaker that uses this tripping mechanism is when work, as when faults such as overcurrent, short circuit occurring, the release action turns clockwise draw bar 1, the elastic force drive locking-bar 2 that draw bar 1 overcomes torsion spring 24 simultaneously is rotated counterclockwise, first hook, 21 and second hook 31 is broken away from, and second hook 31 becomes a free end.Tripping this moment bar 3 to left movement, makes push and block arm 37 contact and promote it with dropout part 4 and moves under the thrust of spring 8, thereby drives snap

close piece

6,7 actions of tripping part, makes operating mechanism 20 trippings, circuit breaker trip.

When the fault elimination needs to close a floodgate, pulling operating grip 5 moves right snap close piece 6, tripping part 7 is resetted, meanwhile the rear end 32 of the 51 promotion tripping bars 3 of the pushing block on the operating grip 5 moves right tripping bar 3, slide relative takes place in the inclined-plane 25 at the inclined-plane 38 at second hook, 31 backs and first hook, 21 backs, and finally make second hook, 31 and first hook 21 hasp once more, thereby realize resetting of this tripping mechanism.

In said mechanism, tripping bar 3 promptly can be used to trigger dropout part 4 and makes operating mechanism 20 trippings, tripping mechanism on the release 10 is resetted, therefore this tripping bar 3 has the operating mechanism of making tripping and makes the release two kinds of functions that reset, the release link of using the circuit breaker of this tripping mechanism can no longer need to be provided with again like this to be used for specially the tripping mechanism that makes release to reset, thereby make the structure of circuit breaker more simple, it is also more convenient to use.

More than the tripping mechanism of a kind of circuit breaker that the embodiment of the invention provided is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum; this description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.

Claims

1. the tripping mechanism of a circuit breaker comprises operating mechanism and release, the dropout part (4) that described operating mechanism comprises operating grip (5) and operating mechanism is threaded off; Described release comprises locking-bar (2) hinged in the middle of, one end (22) of locking-bar (2) is connected with draw bar (1), the other end is provided with first hook (21), it is characterized in that: be connected with between described operating mechanism and the release one can linear slide tripping bar (3), the front end of tripping bar (3) is provided with first on second hook (31) and the locking-bar (2) and links up with (21) hasp mutually, the rear end (32) of tripping bar (3) can contact with described operating grip (5), also be provided with a push and block arm (37) relative on the tripping bar (3), comprise that also a spring (8) is connected with described tripping bar (3) with described dropout part (4).

2. the tripping mechanism of circuit breaker according to claim 1, it is characterized in that: described draw bar (1) is hinged on first rotating shaft (11), also is provided with a swing arm (12) on the draw bar (1), and described swing arm (12) is connected with described locking-bar (2).

3. the tripping mechanism of circuit breaker according to claim 1 is characterized in that: described locking-bar (2) strand is with torsion spring (24) in second rotating shaft (23) in described second rotating shaft (23).

4. the tripping mechanism of circuit breaker according to claim 1, it is characterized in that: described tripping bar (3) is provided with two parallel straight line chutes (33,34), is provided with fixing sliding pin in the described straight line chute.

5. the tripping mechanism of circuit breaker according to claim 1, it is characterized in that: described spring (8) is a torsion spring.

6. the tripping mechanism of circuit breaker according to claim 1, it is characterized in that: described operating grip (5) is provided with push and block piece (51), and described push and block piece (51) is relative with the rear end (32) of described tripping bar.

7. the tripping mechanism of circuit breaker according to claim 1 is characterized in that: the back side of described first hook (21), second hook (31) is provided with the inclined-plane that cooperatively interacts.