CN221149890U

CN221149890U - Breaker switching contact group and breaker

Info

Publication number: CN221149890U
Application number: CN202322944249.5U
Authority: CN
Inventors: 叶晓朋; 侯志勤; 王晨淼; 罗奇; 刘喜梅; 任廷江; 黄尘隆; 张厅
Original assignee: Shangtu Electric Co ltd
Current assignee: Shangtu Electric Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-06-14
Anticipated expiration: 2033-10-31

Abstract

The application relates to a breaker opening and closing contact group and a breaker, and relates to the technical field of breakers. The application has the advantages that the extension part is additionally arranged on the moving contact body, the length of the moving contact is prolonged, and the hole spacing of the moving contact is increased, so that the minimum distance between the moving contact and the fixed contact, namely the opening distance, is increased, the electric arc is more easily prolonged, and the arc extinguishing capability is enhanced.

Description

Breaker switching contact group and breaker

Technical Field

The application relates to the technical field of circuit breakers, in particular to a circuit breaker switching contact group and a circuit breaker.

Background

A circuit breaker is a switching device for controlling and protecting a circuit, which is capable of closing, carrying and breaking a current under a normal circuit, and also capable of closing, carrying and breaking a current under an abnormal circuit for a certain time, to prevent an overload, a malfunction or a short circuit of the circuit from causing a corresponding electrical apparatus to be damaged by malfunction or danger.

The circuit breaker is generally composed of a shell, a transmission mechanism, a contact system and an arc extinguishing system, wherein the transmission mechanism is a main mechanical mechanism for realizing closing and opening action instructions in the circuit breaker, and under the control of the transmission mechanism, a moving contact and a fixed contact in the contact system are closed or disconnected, so that the closing or opening of current is realized. When the moving contact and the fixed contact are disconnected, an arc is easy to generate, the generated arc can enter an arc extinguishing system, and the arc extinguishing system can extinguish the arc, so that a circuit is thoroughly cut off, and the circuit and electrical equipment are protected.

When the breaker of the related art is in breaking, the distance between the moving contact and the fixed contact is smaller, so that the arc extinguishing effect of the breaker is poor, the arc extinguishing speed is slower, and an improvement space exists.

Disclosure of utility model

In order to improve the arc extinguishing effect of a circuit breaker, the application provides a switching contact group of the circuit breaker.

In a first aspect, the present application provides a circuit breaker switching contact set, which adopts the following technical scheme:

The utility model provides a circuit breaker divides and closes contact group, includes moving contact, fixed contact and drive mechanism, the moving contact includes moving contact and moving contact main part, be equipped with the fixed contact on the fixed contact, drive mechanism includes two sets of link assembly, two sets of be equipped with first universal driving axle between the link assembly, link assembly includes first connecting rod and second connecting rod, first connecting rod and second connecting rod are articulated, the moving contact main part divide into moving contact and the extension that supplies moving contact length extension.

By adopting the technical scheme, the length of the moving contact main body is prolonged by the extension part, the minimum distance between the moving contact of the moving contact and the fixed contact of the fixed contact, namely the opening distance, between the moving contact and the fixed contact in the related technology is about 25mm, after the moving contact is prolonged by the extension part, the opening distance between the moving contact and the fixed contact can reach 60-70mm, the size of the opening distance has a certain influence on arc extinguishing capability, the opening distance is increased, the arc can be further prolonged, the arc extinction is promoted, the arc extinguishing speed is accelerated, and the arc extinguishing capability of the circuit breaker is improved; the movable contact piece and the extension part are integrally formed, so that the connection stability of the movable contact piece and the extension part is improved, and the rotation stability of the movable contact piece is ensured.

Optionally, the first connecting rod is opened has mounting hole and first linkage hole, be equipped with the first extension piece that is used for prolonging mounting hole and first linkage hole interval between mounting hole and the first linkage hole.

Through adopting above-mentioned technical scheme, utilize first extension piece to change the distance between mounting hole and the first linkage hole, change the positional relationship of mounting hole and first linkage hole, can increase the length of first connecting rod, because first connecting rod and second connecting rod are the link relation, after changing the length of first connecting rod, first connecting rod and second connecting rod complex turned angle also can change to avoid the circuit breaker to need the condition emergence of expanding volume by a wide margin because of moving contact length increases, keep the circuit breaker in the scope that the user required, prevent that the circuit breaker from being unable to install because of the size is unsuitable.

Optionally, the second connecting rod is provided with a through hole and a second linkage hole communicated with the first linkage hole, and a second extension piece for extending the distance between the through hole and the second linkage hole is arranged between the through hole and the second linkage hole.

Through adopting above-mentioned technical scheme, utilize the second extension piece to increase the distance between through-hole and the second linkage hole, change the positional relationship of through-hole and second linkage hole, can lengthen the length of second connecting rod, because first connecting rod and second connecting rod are the link relation, after changing the length of second connecting rod, first connecting rod and second connecting rod complex turned angle also can change, thereby avoid the circuit breaker to need the condition emergence of enlarging the volume because of moving contact length increases, keep the length of circuit breaker, wide, high in the within range that the user required, prevent that the circuit breaker from being unable to install because of the size is improper, the length of first connecting rod and second connecting rod changes simultaneously, can provide more turned angle scope selections.

Optionally, the transmission mechanism includes rotation part, main shaft, rotation part passes through the main shaft and is connected with the moving contact, rotation part and second connecting rod fixed connection.

Through adopting above-mentioned technical scheme, the movable contact rotates with the main shaft as the center pin through the cooperation of first connecting rod, second connecting rod and rotating part to with the static contact closure or break.

Optionally, a moving contact cover is arranged outside the moving contact main body.

Through adopting the technical scheme, the movable contact cover is fixed on the movable contact main body through the screw, and meanwhile, the movable contact main body is provided with the buckle which is clamped with the movable contact cover, so that the stable connection between the movable contact main body and the movable contact cover is realized, and the movable contact cover is prevented from loosening and falling; the lower part of the movable contact cover is arc-shaped and matched with the rotating part.

Optionally, the transmission mechanism includes a jump button, the jump button is articulated with the first link, be equipped with the connecting axle on the jump button.

Through adopting above-mentioned technical scheme, jump knot uses the connecting axle to rotate as the center pin, and first connecting rod is articulated with the jump knot, drives first connecting rod rotation when the jump knot rotates to drive second connecting rod, rotation portion and moving contact and rotate together.

In a second aspect, the present application provides a circuit breaker, which adopts the following technical scheme:

The circuit breaker comprises a shell, an arc extinguishing system, an operating mechanism and a circuit breaker opening and closing contact group, wherein the arc extinguishing system, the operating mechanism and the circuit breaker opening and closing contact group are arranged in the shell.

By adopting the technical scheme, after the breaker opening and closing contact group is installed, the distance between the moving contact and the fixed contact is increased, and the arc enters the arc extinguishing system to be further prolonged after the arc is generated, so that the arc extinguishing capability is improved, and the safety of a circuit and electrical equipment is effectively protected.

Optionally, the operating mechanism includes a handle that is offset from the center of the circuit breaker and is located on a side remote from the arc extinguishing system.

Through adopting above-mentioned technical scheme, with the handle setting in keeping away from arc extinguishing system one side and deviating from the center of circuit breaker, enlarged the space of arc extinguishing system, circuit breaker deciliter contact group, for increasing the length of moving contact, first connecting rod and second connecting rod provides more spaces to increase the opening between moving contact and the static contact, accelerate the arc extinguishing speed, improve the arc extinguishing effect, strengthen the arc extinguishing ability of circuit breaker.

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

1. An extension part is additionally arranged on the moving contact main body, so that the length of the moving contact is prolonged, the hole spacing of the moving contact is increased, the minimum distance between the moving contact and the fixed contact, namely the opening distance, is increased, the electric arc is more easily prolonged, and the arc extinguishing capability is enhanced;

2. The first extending piece and the second extending piece are additionally arranged on the first connecting rod and the second connecting rod, and the distance between the mounting hole and the first linkage hole, the distance between the through hole and the second linkage hole are increased, so that the rotation angle of the first connecting rod and the second connecting rod is changed, the size of the circuit breaker can be kept unchanged after the moving contact is lengthened, and the installation situation of a user is adapted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic overall structure of embodiment 2 of the present application;

FIG. 2 is a schematic view showing the overall structure of embodiment 2 with the outer casing removed;

fig. 3 is a schematic structural diagram of a moving contact and a fixed contact in embodiment 1 of the present application;

FIG. 4 is a schematic overall structure of embodiment 1 of the present application;

FIG. 5 is a schematic view of an exploded structure of embodiment 1 of the present application;

In the figure, 1, a shell; 2. an arc extinguishing system; 3. an operating mechanism; 31. a handle; 4. a rivet; 5. a moving contact; 51. a movable contact; 52. a moving contact body; 521. a movable contact; 522. an extension; 523. a groove; 524. a buckle; 6. a stationary contact; 61. a stationary contact; 7. a transmission mechanism; 71. a connecting rod assembly; 711. a first link; 7111. a mounting hole; 7112. a first linkage hole; 7113. a first extension piece; 712. a second link; 7121. a through hole; 7122. a second linkage hole; 7123. a second extension piece; 713. a first linkage shaft; 714. a second linkage shaft; 72. a rotating part; 73. a main shaft; 74. jumping buckle; 741. a connecting shaft; 8. a movable contact cover.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

Example 1: the breaker opening and closing contact group comprises a moving contact 5, a fixed contact 6 and a transmission mechanism 7, wherein the fixed contact 6 is connected with a fixed contact 61, referring to fig. 4.

Referring to fig. 3, the moving contact 5 is divided into a moving contact body 52 and a moving contact 51, the moving contact body 52 is divided into a moving contact 521, an extension 522, a groove 523 and a buckle 524, the moving contact 521 and the extension 522 are integrally formed, the length of the moving contact body 52 is increased by adding the extension 522, the overall length of the moving contact 5 is increased, the distance between the groove 523 and the buckle 524 reaches about 35.5mm, so that the distance between the moving contact 5 and the fixed contact 6 is increased, at this time, the distance between the moving contact 5 and the fixed contact 6 can reach about 66mm, which is far greater than the distance before the moving contact 5 is not increased, and the arc generated when the moving contact 5 and the fixed contact 6 are disconnected is elongated, and the arc extinguishing capability is further improved.

Referring to fig. 4 and 5, the transmission mechanism 7 includes a trip 74, a rotating portion 72, and two sets of link assemblies 71, the two sets of link assemblies 71 are oppositely disposed and hinged through a first linkage shaft 713, the link assemblies 71 are divided into a first link 711 and a second link 712, the trip 74 is hinged with a mounting hole 7111 of the first link 711 through a rivet 4, a connecting shaft 741 is installed between two side plates of the trip 74, the trip 74 rotates with the connecting shaft 741 as a rotation axis, the rotating portion 72 is connected with a through hole 7121 of the second link 712 through the second linkage shaft 714, the moving contact 5 is connected with the rotating portion 72 through a main shaft 73 in the rotating portion 72, a moving contact cover 8 is installed outside the moving contact main body 52, the trip 74 rotates and drives the first link 711 to rotate by a hinged relationship with the first link 711, and the first link 711 drives the second link 712, the rotating portion 72 and the moving contact 5 to rotate.

Referring to fig. 5, a first extension piece 7113 on the first link 711 is located between the mounting hole 7111 and the first link hole 7112, increasing the distance between the mounting hole 7111 and the first link hole 7112, and a second extension piece 7123 on the second link 712 is located between the through hole 7121 and the second link hole 7122, increasing the distance between the through hole 7121 and the second link hole 7122; the first extension piece 7113 and the second extension piece 7123 are utilized to change the hole positions on the first connecting rod 711 and the second connecting rod 712 and increase the lengths of the first connecting rod 711 and the second connecting rod 712, so that the matching rotation range of the first connecting rod 711 and the second connecting rod 712 can be changed, the rotation range of the rotation part 72 is changed, and the size of the circuit breaker can be kept unchanged after the moving contact 5 is lengthened through the rotation ranges of the first connecting rod 711, the second connecting rod 712 and the rotation part 72, so that the circuit breaker is suitable for the installation situation of a user.

The implementation principle of the embodiment of the application is as follows: when the movable contact 5 and the fixed contact 6 are disconnected, the jump button 74 rotates in a direction away from the rotating part 72 by taking the connecting shaft 741 as a rotating shaft, drives the first connecting rod 711, the second connecting rod 712 and the rotating part 72 to rotate, an included angle between the first connecting rod 711 and the second connecting rod 712 is an acute angle, the position of the through hole 7121 of the second connecting rod 712 moves towards the connecting shaft 741, and the rotating part 72 rotates by taking the main shaft 73 as the rotating shaft to connect the shaft 741, so that the movable contact 5 and the fixed contact 6 are separated; when the moving contact 5 and the fixed contact 6 are closed, the jump buckle 74 rotates in a direction of approaching the rotating part 72 by taking the connecting shaft 741 as a rotating shaft, drives the first connecting rod 711, the second connecting rod 712 and the rotating part 72 to rotate, an included angle between the first connecting rod 711 and the second connecting rod 712 is an obtuse angle, the position of the through hole 7121 of the second connecting rod 712 is far away from the connecting shaft 741, and the rotating part 72 rotates in a direction of keeping away from the connecting shaft 741 by taking the main shaft 73 as a rotating shaft, so that the moving contact 5 moves towards the fixed contact 6 and is closed with the fixed contact 6.

Example 2: a circuit breaker is different from embodiment 1 in that, referring to fig. 1 and 2, the circuit breaker comprises a housing 1, an arc extinguishing system 2 and an operating mechanism 3, wherein the arc extinguishing system 2, the operating mechanism 3 and a circuit breaker switching contact group are located in the housing 1, a handle 31 in the operating mechanism 3 partially extends out of the housing 1 and is partially located in the housing 1, the whole of the handle 31 is located at one side far away from the arc extinguishing system 2 and deviates from the center of the circuit breaker, the space of the arc extinguishing system 2 and the circuit breaker switching contact group is increased by compressing the space of the operating mechanism 3, and a space foundation is provided for increasing the opening distance.

The implementation principle of the embodiment of the application is as follows: pushing the handle 31 to perform breaking operation, the handle 31 drives the jump button 74 to rotate in a direction away from the rotating part 72 by taking the connecting shaft 741 as a rotating shaft, and then drives the first connecting rod 711, the second connecting rod 712 and the rotating part 72 to rotate, an included angle between the first connecting rod 711 and the second connecting rod 712 is an acute angle, the position of the through hole 7121 of the second connecting rod 712 moves towards the connecting shaft 741, and the rotating part 72 rotates by taking the main shaft 73 as the rotating shaft to rotate the connecting shaft 741, so that the moving contact 5 and the fixed contact 6 are separated, and the breaking operation is completed.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," "third," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a circuit breaker divides and closes contact group, includes moving contact (5), fixed contact (6) and drive mechanism (7), moving contact (5) are including moving contact (51) and moving contact main part (52), be equipped with fixed contact (61) on fixed contact (6), drive mechanism (7) include two sets of link assembly (71), two sets of be equipped with first universal driving axle (713) between link assembly (71), link assembly (71) include first connecting rod (711) and second connecting rod (712), first connecting rod (711) are articulated with second connecting rod (712), a serial communication port, moving contact main part (52) divide into moving contact (521) and supply extension (522) of moving contact (5) length extension.

2. The breaker split contact set according to claim 1, wherein the first link (711) is provided with a mounting hole (7111) and a first linkage hole (7112), and a first extension piece (7113) for extending a distance between the mounting hole (7111) and the first linkage hole (7112) is provided between the mounting hole (7111) and the first linkage hole (7112).

3. The breaker split contact set according to claim 2, wherein the second link (712) is provided with a through hole (7121) and a second linkage hole (7122) communicating with the first linkage hole (7112), and a second extension piece (7123) for extending a distance between the through hole (7121) and the second linkage hole (7122) is provided between the through hole (7121) and the second linkage hole (7122).

4. The breaker split contact set according to claim 1, wherein the transmission mechanism (7) comprises a rotating part (72) and a main shaft (73), the rotating part (72) is connected with the moving contact (5) through the main shaft (73), and the rotating part (72) is hinged with the second connecting rod (712).

5. The breaker switching contact group according to claim 1, wherein the moving contact main body (52) is provided with a moving contact cover (8) outside.

6. The breaker switching contact set according to claim 1, wherein the transmission mechanism (7) comprises a trip button (74), the trip button (74) is hinged with the first connecting rod (711), and a connecting shaft (741) is arranged on the trip button (74).

7. A circuit breaker, characterized by comprising a shell (1), an arc extinguishing system (2), an operating mechanism (3) and the breaker opening and closing contact group according to any one of claims 1 to 6, wherein the arc extinguishing system (2), the operating mechanism (3) and the breaker opening and closing contact group are arranged in the shell (1).

8. Circuit breaker according to claim 7, characterized in that the operating mechanism (3) comprises a handle (31), which handle (31) is offset from the centre of the circuit breaker and located at a side remote from the arc extinguishing system (2).