CN219286312U

CN219286312U - Circuit cutting device

Info

Publication number: CN219286312U
Application number: CN202320270822.6U
Authority: CN
Inventors: 张立军; 龚红年; 单岩岩
Original assignee: Shenzhen Zhixin Guowei Technology Co ltd
Current assignee: Shenzhen Zhixin Guowei Technology Co ltd
Priority date: 2023-02-04
Filing date: 2023-02-04
Publication date: 2023-06-30
Anticipated expiration: 2033-02-04

Abstract

The application relates to the technical field of circuit breakers, in particular to a circuit breaking device which comprises a bus, wherein a part of a circuit is formed, and a weak point is arranged at a bus fracture; the punch is used for punching the weak point, and one side, close to the bus, of the punch is provided with one or more notch grooves; the insulating baffle is arranged on one side, away from the punch, of the bus and is used for being meshed with the inner wall of the notch groove, and one or more insulating baffles are arranged. The circuit has the effect of improving the insulation resistance after circuit disconnection.

Description

Circuit cutting device

Technical Field

The application relates to the technical field of circuit breakers, in particular to a circuit breaking device.

Background

At present, as the name implies, an electric automobile mainly adopts an electric drive automobile, a circuit breaker is generally used as a main power switch of the electric automobile and automatic control equipment, and in the safety field of the electric automobile, the circuit breaker plays roles of preventing overload of a motor and preventing short circuit and ignition of a circuit, and when a collision accident occurs, the circuit breaker can be used for cutting off the circuit.

With the increasing requirement on the voltage class of the circuit breaker, the requirement on the creepage distance of the circuit breaker is also increased, but based on the current market size limitation and the trend that the weight and the volume of the circuit breaker product are smaller and smaller nowadays, the creepage distance of the circuit breaker is difficult to increase, however, the creepage distance is usually increased by increasing the height and the like of the product in the prior art, but the volume of the product is increased due to the structure, so that the occupied space of the product is increased, and the situation is to be improved.

Disclosure of Invention

In order to solve the problem that increasing the creepage distance of a circuit breaker easily causes the increase of the occupied space of a product, the application provides a circuit breaking device.

The application provides a circuit cutting device adopts following technical scheme:

a circuit breaking device comprising a busbar forming part of a circuit, the busbar being provided with a weak point at a break; the punch is used for punching the weak point, and one side, close to the bus, of the punch is provided with one or more notch grooves; the insulating baffle is arranged on one side, away from the punch, of the bus and is used for being meshed with the inner wall of the notch groove, and one or more insulating baffles are arranged.

Through adopting above-mentioned technical scheme, the drift cuts off the generating line from the weak point of generating line, through notch groove and insulation barrier meshing, the produced electric arc needs to carry out the creepage along insulation barrier's outer wall after the drift cuts off the generating line, through increasing the physical distance between the fracture after being cut at present to increased cutting device's creepage distance, compare in prior art generally through the high equidimension in order to increase creepage distance that increases the product, this application is mutually supported through the notch groove that insulation barrier and cutting part were seted up, improved the creepage distance that increases the circuit breaker and lead to the problem of product occupation space increase easily.

Optionally, the device further comprises a shell, wherein a containing cavity is formed in the shell, the busbar divides the containing cavity into a first cavity used for containing the punch and a second cavity used for containing the insulating baffle, the first cavity is communicated with the second cavity, and an actuating piece used for driving the punch to move is arranged on one side, close to the punch, of the top wall of the first cavity.

Through adopting above-mentioned technical scheme, cutting device supplies drift and insulating baffle to settle respectively through holding chamber divided first cavity and second cavity, makes the drift slide to the second cavity from first cavity through installing the actuating piece in, and the drift slides to the second cavity after cutting off the generating line and meshes with insulating baffle.

Optionally, the punch comprises a moving part and a cutting part arranged on one side of the moving part, which is close to the bus, the bus comprises a separating part cut by the cutting part and a main body part fixed in the shell, and an arc striking groove used for embedding the separating part is arranged on one side of the second cavity, which is close to the bus.

Through adopting above-mentioned technical scheme, after cutting portion cutting generating line, the separation portion embedding is in the striking inslot, can strengthen the arc extinguishing ability of circuit breaker through placing the arc extinguishing medium in the striking inslot.

Optionally, the insulating baffle divides the second cavity into a first insulating chamber and a second insulating chamber for embedding the cutting part, a first guide rail used for being embedded in the first insulating chamber is arranged on one side of the cutting part, which is close to the first insulating chamber, and a second guide rail used for being embedded in the second insulating chamber is arranged on one side of the cutting part, which is close to the second insulating chamber.

Through adopting above-mentioned technical scheme, after the punch breaks the generating line, the punch still is moving, plays the guide effect to the slip of punch through installation first guide rail and second guide rail to reduce the probability that the longitudinal direction slip of punch produced the skew, when first guide rail embedded into the first insulating chamber, the recess inslot that the second guide rail embedded into the second insulating chamber, the recess inslot that insulating baffle and punch were seted up begins to mesh, and when the punch stopped the motion, insulating baffle thoroughly embedded in the recess inslot.

Optionally, the first guide rail is close to one side of the bus bar and is provided with a first abdicating groove for embedding the bus bar, and the second guide rail is close to one side of the bus bar and is provided with a second abdicating groove for embedding the bus bar.

Through adopting above-mentioned technical scheme, when the drift moves towards the generating line, utilize the design of first groove of stepping down and second groove of stepping down more be convenient for cut the generating line.

Optionally, an actuation chamber is provided on a side of the housing adjacent the actuation member for receiving the actuation member, the actuation member being arranged to generate a force applied to the moving part of the punch in response to an actuation signal to urge the moving part into movement.

By adopting the above technical solution, the actuating chamber is in communication with the first chamber, and the actuating member may be any suitable actuating member in the art, such as an explosive actuator, which is activated upon receipt of an actuating signal to generate an explosive gas which flows from the actuating chamber into the first chamber and acts on the side of the moving part remote from the cutting part, thereby pushing the punch to move in the direction of the generatrix.

Optionally, the cutting portion is made of an insulating material.

Through adopting above-mentioned technical scheme, produce electric arc when cutting portion cuts off the generating line, cutting portion is made by the better material of insulating properties, and the insulating impedance after the circuit cuts off can be improved to the structure in this application scheme of cooperation to improve the protection ability of cutting device to the product.

Optionally, a cutting point is arranged on one side of the separating part away from the moving part.

By adopting the technical scheme, the design of the disconnection point is more convenient for the breaker to disconnect the bus.

Optionally, the thickness of the separation portion is smaller than the thickness of the main body portion.

Through adopting above-mentioned technical scheme, the thickness of separation portion is less than the thickness of main part, is favorable to improving the efficiency of cutting separation portion of cutting portion.

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

1. the punch cuts off the bus from the weak point of the bus, the punch is meshed with the insulating baffle through the notch groove, when the punch cuts off the bus, an electric arc generated is required to climb along the outer wall of the insulating baffle, and the creepage distance of the cutting device is increased by increasing the physical distance between the current cut-off ports, so that compared with the creepage distance of the cutting device which is increased by increasing the height and the like of a product in the prior art, the creepage distance is increased;

2. after the punch breaks the bus, the punch still moves, the sliding of the punch is guided by installing a first guide rail and a second guide rail, so that the probability of deviation generated by the sliding of the punch in the longitudinal direction is reduced, when the first guide rail is embedded into a first insulation chamber, the second guide rail is embedded into a second insulation chamber, the insulation baffle is meshed with a notch groove formed by the punch, and when the punch stops moving, the insulation baffle is thoroughly embedded into the notch groove;

3. when the punch moves towards the bus, the first yielding groove and the second yielding groove are used for cutting the bus more conveniently.

4. After the cutting part cuts the bus, the separated part which is separated and is separated is embedded into the arc striking groove, and the arc extinguishing capability of the circuit breaker can be enhanced by placing an arc extinguishing medium in the arc striking groove.

Drawings

FIG. 1 is a cross-sectional view of a housing and punch in an embodiment of the present application;

FIG. 2 is an exploded view of the housing and actuator in an embodiment of the present application;

FIG. 3 is a schematic view of the structure of the moving part and the cutting part in the embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 1 in accordance with an embodiment of the present application;

fig. 5 is a cross-sectional view of a busbar and punch in an embodiment of the present application.

Reference numerals illustrate:

1. a bus; 2. weak points; 3. a punch; 4. an insulating baffle; 5. a notch groove; 6. a housing; 7. a receiving chamber; 8. a first chamber; 9. a second chamber; 10. an actuator; 11. a first insulating chamber; 12. a second insulating chamber; 13. a first guide rail; 14. a second guide rail; 15. a first relief groove; 16. a second relief groove; 17. a moving part; 18. a cutting section; 19. an arc striking groove; 20. a separation section; 21. a main body portion; 22. an actuation chamber; 23. and cutting off the points.

Detailed Description

The present application is described in further detail below.

The embodiment of the application discloses a circuit cutting device. Referring to fig. 1, a bus bar 1, a punch 3 and an insulating baffle 4, wherein the bus bar 1 forms a part of a circuit, a weak point 2 is designed at a fracture of the bus bar 1, one or more notch grooves 5 are formed in one side of the punch 3 close to the bus bar 1, the weak point 2 is bent towards two sides after being broken by the punch 3, the insulating baffle 4 is arranged on one side of the bus bar 1 far away from the punch and is used for being meshed with the inner wall of the notch grooves 5, and one or more insulating baffles 4 are arranged.

In this application embodiment, punch 3 cuts off busbar 1 from weak point 2 of busbar 1, through notch groove 5 and the meshing of insulating barrier 4, the produced electric arc needs to creep up along the outer wall of insulating barrier 4 after punch 3 cuts off busbar 1, through increasing the physical distance between the fracture after being cut at present, thereby increased cutting device's creepage distance, compare in prior art and generally through the high equidimension that increases the product in order to increase creepage distance, this application is mutually supported through notch groove 5 that insulating barrier 4 and cutting part 18 were seted up, the creepage distance that has improved the increase circuit breaker leads to the problem of product occupation space increase easily.

In some embodiments, one insulating baffle 4 is installed, one corresponding notch groove 5 is formed, or a plurality of insulating baffles 4 are installed, and a plurality of corresponding notch grooves 5 are formed; the insulating baffle 4 can be installed one or more, and the notch groove 5 can be offered one or more, and a plurality of insulating baffles 4 and correspond to the corresponding design of corresponding notch groove 5 can increase the creepage distance of circuit breaker.

Referring to fig. 1 and 2, the device further comprises a shell 6, a containing cavity 7 is formed in the shell 6, the busbar 1 divides the containing cavity 7 into a first cavity 8 used for placing the punch 3 and a second cavity 9 used for placing the insulating baffle 4, the first cavity 8 is communicated with the second cavity 9, and an actuating piece 10 used for driving the punch 3 to move is arranged on one side, close to the punch 3, of the top wall of the first cavity 8; the housing 6 is provided with an actuation chamber 22 on the side thereof adjacent to the actuation member 10 for receiving the actuation member 10, the actuation member 10 being arranged to generate a force applied to the moving part 17 of the punch 3 in response to an actuation signal to urge the moving part 17 into movement.

In the embodiment of the application, the first chamber 8 and the second chamber 9 divided by the accommodating cavity 7 are respectively provided for the punch 3 and the insulating baffle 4, the actuating member 10 is installed to enable the punch 3 to slide from the first chamber 8 into the second chamber 9, the punch 3 slides into the second chamber 9 to be meshed with the insulating baffle 4 after cutting the bus bar 1, the actuating member 22 is communicated with the first chamber 8, the actuating member 10 can be any suitable actuating member 10 in the field, such as an explosion type actuator, and the actuating member 10 is excited to generate explosion gas when receiving an actuating signal, and the explosion gas flows from the actuating member 22 into the first chamber 8 and acts on the side of the moving part 17 away from the cutting part 18, thereby pushing the punch 3 to move towards the bus bar 1.

Referring to fig. 3 and 4, the punch 3 includes a moving part 17 and a cutting part 18, the cutting part 18 is mounted on one side of the moving part 17 close to the busbar 1, the busbar 1 includes a separating part 20 cut by the cutting part 18 and a main body part 21 fixed in the housing 6, and an arc striking groove 19 for embedding the separating part 20 is formed on one side of the second chamber 9 close to the busbar 1; after the cutting part 18 cuts the bus bar 1, the divided and separated separation part 20 is embedded into the arc striking groove 19, and the arc extinguishing capability of the circuit breaker can be enhanced by placing an arc extinguishing medium in the arc striking groove 19.

In some embodiments, the cutting part 18 is made of insulating material, when the cutting part 18 cuts off the bus bar 1, an arc is generated, the cutting part 18 is made of a material with better insulating property, and the structure in the scheme of the application can improve the insulating resistance after the circuit is cut off, so that the protection capability of the cutting device on products is improved.

In some embodiments, a cutting point 23 is designed on the side of the separating portion 20 away from the moving portion 17, the thickness of the separating portion 20 is smaller than that of the main portion 21, the design of the cutting point 23 is more convenient for the breaker to cut off the bus bar 1, and the thickness of the separating portion 20 is smaller than that of the main portion 21, so that the efficiency of the cutting portion 18 to cut the separating portion 20 is improved.

Referring to fig. 4 and 5, the insulating barrier 4 divides the second chamber 9 into a first insulating chamber 11 and a second insulating chamber 12 in which the cutting portion 18 is inserted, a first guide rail 13 for inserting the first insulating chamber 11 is installed at a side of the cutting portion 18 near the first insulating chamber 11, and a second guide rail 14 for inserting the second insulating chamber 12 is installed in the cutting portion 18 near the second insulating chamber 12; a first abdicating groove 15 for embedding the bus bar 1 is formed in one side, close to the bus bar 1, of the first guide rail 13, and a second abdicating groove 16 for embedding the bus bar 1 is formed in one side, close to the bus bar 1, of the second guide rail 14.

In this application embodiment, after the punch 3 breaks the busbar 1, the punch 3 still moves, the slip of punch 3 is played the guide effect through installation first guide rail 13 and second guide rail 14, so as to reduce the probability that the longitudinal direction of punch 3 slides and produces the skew, when first guide rail 13 imbeds in the first insulating chamber 11, when second guide rail 14 imbeds in the second insulating chamber 12, notch groove 5 that insulating barrier 4 and punch 3 offered begins to mesh, when punch 3 stops moving, insulating barrier 4 thoroughly imbeds in notch groove 5, rethread design first and

second yields groove

15 and 16, protect busbar 1 before cutting device does not receive the circuit breaking signal, simultaneously also when punch 3 moves towards busbar 1, the design that utilizes first and

second yields groove

15 and 16 is more convenient for cut busbar 1.

The implementation principle of the circuit cutting device in the embodiment of the application is as follows: the actuating member 10 may be any suitable actuating member 10 in the art, such as an explosion type actuator, in which upon receipt of an actuating signal, the actuating member 10 is energized to generate an explosive gas which flows from the actuating chamber 22 into the first chamber 8 and acts on the side of the punch 3 away from the busbar 1, thereby pushing the punch 3 towards the busbar 1, the punch 3 cuts the busbar 1 from the weak point 2 of the busbar 1, engages the insulating barrier 4 through the notch 5, the arc generated after the punch 3 cuts the busbar 1 needs to climb along the outer wall of the insulating barrier 4, and increases the creepage distance of the cutting device by increasing the physical distance between the now cut-outs, compared to the prior art which generally increases the creepage distance by increasing the height and the like of the product, the problem of increasing the creepage distance of the breaker easily resulting in an increase in the occupation space of the product is improved by the cooperation of the notch 5 opened by the insulating barrier 4 and the cutting part 18

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 circuit breaking device, comprising:

a busbar (1) forming part of a circuit, the busbar (1) being provided with a weak point (2) at a break;

the punch (3) is used for punching off the weak point (2), and one side of the punch (3) close to the bus (1) is provided with one or more notch grooves (5);

the insulating baffle plates (4) are arranged on one side, away from the punch (3), of the bus (1) and are used for being meshed with the inner wall of the notch groove (5), and one or more insulating baffle plates (4) are arranged;

the device comprises a punch (3) and is characterized by further comprising a shell (6), wherein a containing cavity (7) is arranged in the shell (6), the busbar (1) divides the containing cavity (7) into a first cavity (8) for containing the punch (3) and a second cavity (9) for containing an insulating baffle (4), the first cavity (8) is communicated with the second cavity (9), and an actuating piece (10) for driving the punch (3) to move is arranged on one side, close to the punch (3), of the top wall of the first cavity (8);

the punch (3) comprises a moving part (17) and a cutting part (18) arranged on one side, close to the bus bar (1), of the moving part (17), the bus bar (1) comprises a separating part (20) cut by the cutting part (18) and a main body part (21) fixed in the shell (6), and an arc striking groove (19) used for embedding the separating part (20) is arranged on one side, close to the bus bar (1), of the second chamber (9);

the insulation baffle plate (4) divides the second chamber (9) into a first insulation chamber (11) and a second insulation chamber (12) which are embedded by the cutting part (18), a first guide rail (13) which is used for being embedded in the first insulation chamber (11) is arranged on one side of the cutting part (18) close to the first insulation chamber (11), and a second guide rail (14) which is used for being embedded in the second insulation chamber (12) is arranged on one side of the cutting part (18) close to the second insulation chamber (12);

one side of the first guide rail (13) close to the bus (1) is provided with a first yielding groove (15) for embedding the bus (1), and one side of the second guide rail (14) close to the bus (1) is provided with a second yielding groove (16) for embedding the bus (1).

2. A circuit breaking device according to claim 1, characterized in that the housing (6) is provided with an actuation chamber (22) on the side close to the actuation member (10) for receiving the actuation member (10), the actuation member (10) being arranged to generate a force applied to the moving part (17) of the punch (3) in response to an actuation signal to push the moving part (17) into motion.

3. A circuit breaking device according to claim 1, characterized in that the cutting portion (18) is made of an insulating material.

4. A circuit breaking device according to claim 1, characterized in that the separating part (20) is provided with a breaking point (23) at a side remote from the moving part (17).

5. A circuit breaking device according to claim 4, characterized in that the thickness of the separating portion (20) is smaller than the thickness of the main body portion (21).