CN116130311A

CN116130311A - Cutting device for circuit breaker

Info

Publication number: CN116130311A
Application number: CN202211394471.6A
Authority: CN
Inventors: 张立军
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-05-16

Abstract

The present invention relates to a cutting device for a circuit breaker, comprising a cutting punch for cutting a circuit when the cutting punch receives a pushing force of a predetermined magnitude; an arc extinguishing medium, disposed on a side of the cutoff punch for approaching the circuit, is for extending into the cavity to seal and suppress or extinguish the arc after the circuit is cut off. The circuit breaker has the effect of being capable of cutting off the circuit rapidly and safely.

Description

Cutting device for circuit breaker

Technical Field

The application relates to the technical field of battery breaking systems, in particular to a breaking device for a circuit breaker.

Background

The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device) and integrates the advanced technology in the aspect of driving a power control box of the automobile, and the formed technical principle is advanced, the automobile is provided with a novel technology and a novel structure, wherein the electric automobile is widely used, and in the safety field of the electric automobile, a circuit breaker is used for closing certain circuits in a collision accident, so that the risk of fire is reduced as much as possible.

In the related art, a circuit breaker is usually selected to be a hot-melt circuit breaker, so that when a circuit is overloaded for a long time or a short circuit occurs, heat generated by current can be gradually accumulated until the circuit is fused, thereby achieving the purpose of cutting off the circuit.

For the related art, there is a way to fuse the circuit by the heat generated by the current, and the time period for cutting off the circuit is long, so that the defect of untimely safety protection is easily caused when an accident occurs.

Disclosure of Invention

In order to cut off a circuit in time when an accident occurs, the application provides a cutting device for a circuit breaker.

The application provides a breaker adopts following technical scheme:

a breaking device for a circuit breaker, comprising:

a cutting punch for cutting off a circuit when the cutting punch receives a predetermined amount of pushing force;

and an arc extinguishing medium arranged on one side of the cutting punch, which is close to the circuit, wherein after the circuit is cut off, the arc extinguishing medium is used for extending into the cavity to seal and inhibit or extinguish the arc.

By adopting the technical scheme, on one hand, the circuit can be cut off through the cutting punch, so that corresponding safety measures can be made faster under the conditions of collision accidents and high current generated by short circuit; on the other hand, compared with the mode that the arc extinguishing medium is positioned on the side of the cutting punch away from the circuit, in the design mode, because the cutting punch is made of hard materials, when external pushing force is received, the cutting device can apply cutting force to the circuit (such as a copper bar or an aluminum bar) more uniformly, if the circuit is in a one-section cutting structure, the cut part of the circuit is not easy to incline, the condition that the distance between the cut part of the circuit and the input part of the circuit is unequal to the distance between the cut part of the circuit and the output part is generated, and continuous arc discharge is not easy to occur, and the resistance value of the insulation resistor can be further improved; if the circuit is of a two-section bending and cutting structure, arc extinguishing medium is not easy to extend into a gap between the upper shell and the lower shell of the circuit breaker due to uneven force application of the cutting device, so that the distance between a cut-off part of the circuit and an input part or an output part of the circuit is insufficient, and continuous arc discharge is not easy to occur.

Preferably, the shape of the cutting punch includes at least one punch.

Through adopting above-mentioned technical scheme, then cutting device can adapt more different grade type circuit breakers to can promote the comprehensive properties of circuit breaker.

Preferably, the arc extinguishing medium is attached to the cutting punch.

Through adopting above-mentioned technical scheme, compare in the mode that is simple pile up between arc extinguishing medium and the cutting punch, this kind of design mode, before the cutting punch does not remove to predetermined distance, the arc extinguishing medium can be difficult for extending to the gap between the last casing of circuit breaker and the lower casing more to can make the arc extinguishing medium can extend to the cavity inside better, with the effect of promoting to restrain or extinguish the electric arc.

Preferably, the cutting punch includes a pressure piston portion for receiving an external pushing force; the cutting part and the pressure piston part are integrally formed, and the cutting part is used for attaching the arc extinguishing medium.

By adopting the technical scheme, the pressure piston part and the cutting part are integrally formed, so that the manufacturing cost of the cutting device can be increased; on the other hand, when the cutting punch is pushed, feedback is smoother, so that the cutting effect of a circuit can be improved.

Preferably, the arc extinguishing medium is arranged in a fit with the cutting punch for smooth arrangement of the peripheral surface of the device.

Through adopting above-mentioned technical scheme, before the circuit breaker does not start, the arc extinguishing medium can be in the cavity of casing on the circuit breaker with cutting off the drift, so the arc extinguishing medium fills and is smooth setting to the week side surface after cutting off the drift to can make the casing structure of circuit breaker simpler.

Preferably, when the cutting punch moves to the bottom surface of the cavity, the cutting punch stops moving, and the arc extinguishing medium is desorbed from the cutting punch, so as to inhibit or extinguish the arc with the surface extending to the whole cavity.

Through adopting above-mentioned technical scheme, when cutting off the drift motion to the bottom surface of cavity, the arc extinguishing medium can be under the effect of inertia desorption cutting off the drift, then can extend to the surface of arc extinguishing chamber, still can adsorb on the part that the circuit was cut off simultaneously to just, reach sealed arc extinguishing chamber and restrain or quench the purpose of electric arc.

Preferably, the arc extinguishing medium is used to be permeated by the cutting punch, the circuit and the lower case of the circuit breaker when the cutting punch moves.

Through adopting above-mentioned technical scheme, when the drift that cuts off receives the driving force and removes, the drift that cuts off can dash into the predetermined degree of depth of arc extinguishing medium, and the infiltration takes place between the lower casing of arc extinguishing medium and circuit breaker simultaneously to can not block the motion of cutting off the drift, and then reach the purpose of cutting off the circuit.

Preferably, the arc extinguishing medium is made of a material with high volume resistance and capable of adsorbing an electric arc.

By adopting the technical scheme, on one hand, the volume resistance of the arc extinguishing medium is high, and the resistance of the insulation resistor can be directly improved; on the other hand, after the arc extinguishing medium extends into the cavity, the arc extinguishing medium adsorbs an arc generated after the circuit is cut off, so that the insulation resistance of the cut-off circuit breaker can reach more than G ohms.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arc extinguishing medium is arranged on one side of the cutting punch close to the circuit and in a working state after the circuit is cut off, so that the cutting device can apply cutting force more uniformly to cut off the circuit (such as a copper bar or an aluminum bar), the cut-off part of the circuit is not easy to incline, the condition that the distance between the cut-off part of the circuit and the input part of the circuit or the distance between the cut-off part of the circuit and the output part of the circuit is unequal is caused, the condition of continuous arc discharge is not easy to occur, and the resistance value of the insulation resistor can be further improved;

2. through the mode that the arc extinguishing medium adheres to on cutting off the punch, before cutting off the punch and not moving to predetermined distance, the arc extinguishing medium can be difficult for extending to the gap between the upper casing and the lower casing of circuit breaker more to can make the arc extinguishing medium can extend to the cavity internal body better, with the effect of promoting to restrain or extinguish the electric arc.

Drawings

Fig. 1 is a schematic diagram of a state when a circuit is not cut in an embodiment of the present application.

Fig. 2 is a schematic diagram of a circuit in an embodiment of the present application after a circuit is cut off.

Reference numerals illustrate: 1. cutting off the punch; 11. a pressure piston section; 12. a cutting section; 2. arc extinguishing medium; 3. an upper housing; 4. a lower housing; 41. an arc extinguishing chamber; 5. a circuit member.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-2.

The embodiment of the application discloses a cutting device for a circuit breaker. Referring to fig. 1 and 2, the breaking device for a circuit breaker includes a breaking punch 1 and an arc extinguishing medium 2, wherein the breaking punch 1 and the arc extinguishing medium 2 are part of the circuit breaker, so the structure of the circuit breaker is described herein, the circuit breaker includes an upper case 3, a lower case 4 and a circuit member 5, the upper case 3 and the lower case 4 are fixedly connected through bolts, wherein the upper case 3 has a cavity for accommodating the breaking punch 1 and the arc extinguishing medium 2 before being triggered, and the lower case 4 has a cavity for accommodating the breaking portion 12 of the circuit member 5 and the arc extinguishing medium 2 after the circuit is broken, which may also be referred to as an arc extinguishing chamber 41; the circuit member 5 is sandwiched between the upper case 3 and the lower case 4, and the circuit member 5 includes, but is not limited to, copper bars and aluminum bars, so that a basic structure of the circuit breaker is formed, while in the present embodiment, a structure in which the circuit member 5 is bent and cut in two stages is exemplified.

Referring to fig. 1 and 2, the cutoff punch 1 is made of a hard material, wherein the cutoff punch 1 includes a pressure piston portion 11 and a cutoff portion 12, wherein the pressure piston portion 11 is for receiving a driving force applied by a driving source of a circuit breaker; the cutting portion 12 is integrally provided with the pressure piston portion 11, the cutting portion 12 is located on a side of the pressure piston portion 11 close to the circuit member 5, and the cutting portion 12 serves to cut off the circuit member 5, and the shape of the cutting portion 12 includes, but is not limited to, a single punch, a double punch, a triple punch, a four punch, and the like, so that the cutting device can be adapted to different circuit breakers.

Referring to fig. 1 and 2, the arc extinguishing medium 2 is embedded on the cutting part 12 of the cutting punch 1, and meanwhile, the arc extinguishing medium 2 is matched with the shape of the cutting punch 1, so that the peripheral side surface of the cutting device is smoothly arranged, for example, is similar to the peripheral side surface of a cylinder, a cuboid, an elliptic cylinder and the like, so that the manufacturing cost of the upper shell 3 of the circuit breaker can be reduced, but in other embodiments, the peripheral side surface of the cutting device can be arranged in an uneven mode after the arc extinguishing medium 2 is adhered, meanwhile, in the embodiment, the arc extinguishing medium 2 is made of a material with high volume resistance and capable of absorbing an arc, and the arc extinguishing medium 2 also has the characteristic of being permeated by the cutting punch 1, the circuit member 5 and the lower shell 4 of the circuit breaker, so that the smooth movement of the cutting punch 1 can be kept, and particularly, the arc extinguishing medium 2 comprises but is not limited to silica gel and silicone oil.

Referring to fig. 1 and 2, the cutting punch 1 is instantaneously stopped when moving to the bottom surface of the arc extinguishing chamber 41, and simultaneously, under the action of inertia force, the arc extinguishing medium 2 desorbs the arc extinguishing chamber 41 which is cut off the punch 1 and continues to move downwards until the arc extinguishing chamber extends to the surface of the arc extinguishing chamber 41, and simultaneously, the arc extinguishing medium 2 also adsorbs an arc generated after the circuit member 5 is cut off, so that the effect of sealing the arc extinguishing chamber 41 and extinguishing the arc is achieved, and the insulation resistance of the circuit breaker can reach more than G ohms.

The implementation principle of the cutting device for the circuit breaker is as follows: on the one hand, the circuit can be cut off by cutting off the punch head 1, so that corresponding safety measures can be made more quickly under the condition that collision accidents are met and large current is generated by short circuit; on the other hand, in this design, the cutting punch 1 is made of a hard material, and the arc extinguishing medium 2 is attached to the cutting punch 1 in a fitting manner, so that the cutting device can uniformly apply a cutting force to the circuit member 5, compared to the case where the arc extinguishing medium 2 is located on the side of the cutting punch 1 away from the circuit member 5.

If the circuit member 5 is of a one-stage cut-off structure, the cut-off part of the circuit is not easy to incline, and the situation that the distance between the cut-off part 12 of the circuit and the input part and the output part of the circuit is insufficient occurs, so that the continuous arc discharge is not easy to occur, and the resistance value of the insulation resistor can be further improved; the circuit member 5 is of a two-stage bending and cutting structure, so that the arc extinguishing medium 2 is not easy to extend into a gap between the upper shell 3 and the lower shell 4 of the circuit breaker due to uneven force application of a cutting device, and the distance between a cut-off part 12 of the circuit and an input part or an output part of the circuit is insufficient, and further continuous arc discharge is not easy to occur.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A breaking device for a circuit breaker, characterized by: comprising the following steps:

a cutting punch (1), wherein the cutting punch (1) is used for cutting off a circuit when the cutting punch (1) receives a pushing force with a preset magnitude;

and an arc extinguishing medium (2) arranged on one side of the cutting punch (1) close to the circuit, wherein after the circuit is cut off, the arc extinguishing medium (2) is used for extending into the cavity to seal and inhibit or extinguish the arc.

2. The breaking device for circuit breaker according to claim 1, characterized in that: the shape of the cutting punch (1) comprises at least one punch.

3. The breaking device for circuit breaker according to claim 1, characterized in that: the arc extinguishing medium (2) is attached to the cutting punch (1).

4. The breaking device for circuit breaker according to claim 3, wherein: the cutting punch (1) comprises a pressure piston part (11) and a cutting part (12), wherein the pressure piston part (11) is used for receiving external thrust; the cutting part (12) and the pressure piston part (11) are integrally formed, and the arc extinguishing medium (2) is attached to the cutting part (12).

5. The breaking device for circuit breaker according to claim 3, wherein: the arc extinguishing medium (2) is arranged in a matching way with the cutting punch (1) and is used for enabling the peripheral surface of the device to be arranged smoothly.

6. The breaking device for circuit breaker according to claim 3, wherein: when the cutting punch (1) moves to the bottom surface of the cavity, the cutting punch (1) stops moving, and meanwhile the arc extinguishing medium (2) is desorbed from the cutting punch (1) and used for inhibiting or extinguishing an arc with the surface extending to the whole cavity.

7. The breaking device for circuit breaker according to claim 3, wherein: when the cutting punch (1) moves, the arc extinguishing medium (2) is used for being permeated by the cutting punch (1), a circuit and a lower shell (4) of the circuit breaker.

8. The breaking device for circuit breaker according to claim 1, characterized in that: the arc extinguishing medium (2) is made of a material with high volume resistance and capable of adsorbing an electric arc.