CN220021005U - AC/DC miniature circuit breaker - Google Patents
AC/DC miniature circuit breaker Download PDFInfo
- Publication number
- CN220021005U CN220021005U CN202321282708.1U CN202321282708U CN220021005U CN 220021005 U CN220021005 U CN 220021005U CN 202321282708 U CN202321282708 U CN 202321282708U CN 220021005 U CN220021005 U CN 220021005U
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- China
- Prior art keywords
- movable contact
- long
- short
- circuit breaker
- shell
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- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 238000004880 explosion Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
The utility model provides an AC/DC miniature circuit breaker. The technical scheme adopted comprises the following steps: the tripping mechanism comprises a support, a lock catch and a jump buckle, wherein the support is coaxially connected to a main installation shaft of the shell, the jump buckle is axially connected to the upper end of the lock catch, the jump buckle is connected with the operating handle through a connecting rod, and a moving contact is axially connected to the lower end of the support, and the tripping mechanism is characterized in that: the power-assisted connecting device is characterized in that a power-assisted torsion spring is arranged at the shaft joint of the lock catch, a force arm at the lower end of the power-assisted torsion spring acts on the lower end of the lock catch and a force arm at the upper end of the lock catch act on the upper end of the support, the movable contact consists of a long movable contact or a short movable contact, the upper ends of the long movable contact or the short movable contact are connected with a power-assisted tension spring, the other end of the power-assisted tension spring is connected with the shell, a first flexible connecting wire welding part is arranged at the upper end of the long movable contact, and a first abdicating space for abdicating the first flexible connecting wire welding part is arranged in the shell.
Description
Technical Field
The utility model relates to a low-voltage electrical appliance, in particular to a miniature circuit breaker.
Background
The miniature circuit breaker (English name: miniature Circuit Breaker) is also called miniature circuit breaker (Micro Circuit Breaker), is suitable for overload and short-circuit protection of the line from the rated voltage of 230/400V to the rated current of 63A at the alternating current of 50/60Hz, and can also be used as the infrequent operation conversion of the line under normal conditions. According to the different types of applicable currents, miniature circuit breakers are divided into direct current circuit breakers and alternating current circuit breakers, the biggest difference between the direct current circuit breakers and the alternating current circuit breakers is that the arc extinguishing capacity and the breaking capacity are different, and the requirements of the direct current circuit breakers are higher. Therefore, the housings of the conventional dc circuit breaker and the ac circuit breaker, the trip mechanism installed in the housings, and the like cannot be commonly used with each other, resulting in inconvenience in production and assembly and an increase in cost.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an AC/DC miniature circuit breaker.
In order to solve the problems, the technical scheme adopted by the utility model comprises the following steps: the tripping mechanism comprises a support, a lock catch and a jump buckle, wherein the support is coaxially connected to a main installation shaft of the shell, the jump buckle is axially connected to the upper end of the lock catch, the jump buckle is connected with the operating handle through a connecting rod, and a moving contact is axially connected to the lower end of the support, and the tripping mechanism is characterized in that: the power-assisted torsion spring is arranged at the shaft joint of the lock catch, the force arm at the lower end of the power-assisted torsion spring acts on the lower end of the lock catch and the force arm at the upper end of the lock catch acts on the upper end of the support, the movable contact consists of a long movable contact or a short movable contact, the upper end of the long movable contact or the short movable contact is connected with the power-assisted tension spring, the other end of the power-assisted tension spring is connected with the shell, a first flexible connecting wire welding part is arranged at the upper end of the long movable contact, a first yielding space for yielding the first flexible connecting wire welding part is arranged in the shell, a second flexible connecting wire welding part is arranged at the middle of the short movable contact, a second yielding space for yielding the second flexible connecting wire welding part is arranged in the shell, and the fixed contact consists of a first fixed contact matched with the long movable contact or a second fixed contact matched with the short movable contact.
The alternating current-direct current miniature circuit breaker is characterized in that: the upper end of the long movable contact is provided with a waist-shaped positioning groove matched with the main installation shaft of the shell in a positioning way.
The alternating current-direct current miniature circuit breaker is characterized in that: the upper end of the short movable contact is provided with a U-shaped positioning groove matched with the main installation shaft in a positioning way.
The alternating current-direct current miniature circuit breaker is characterized in that: the shell lower extreme be equipped with the short striking board that long moving contact suited, perhaps be equipped with the long striking board that short moving contact suited, short striking board, long striking board are all fixed through the cooperation of the first board that holds in the shell and the second board that holds.
The alternating current-direct current miniature circuit breaker is characterized in that: and a metal positioning rod for positioning the long moving contact or the short moving contact is arranged in the shell.
The alternating current-direct current miniature circuit breaker is characterized in that: the upper ends of the short arc striking plate and the long arc striking plate are respectively provided with a positioning protruding part, and the positioning protruding parts are matched with the positioning concave in the shell in a positioning way.
The alternating current-direct current miniature circuit breaker is characterized in that: the long moving contact and the upper end of the short moving contact are respectively provided with a tension spring connecting hole.
The AC/DC miniature circuit breaker has the advantages that: on the basis of an alternating current circuit breaker, the opening distance is increased by improving the shell and arranging the long moving contact, then the arc striking plate and the fixed contact are correspondingly moved downwards to realize quick arc striking, and meanwhile, the breaking capacity is improved by adding the booster torsion spring and the booster tension spring, so that the requirements of high arc extinguishing capacity and high breaking capacity of the direct current circuit breaker are met, and therefore, on the basis of the alternating current circuit breaker, the assembly of the direct current circuit breaker can be realized only by replacing the moving contact, the fixed contact and the arc striking plate.
Drawings
The utility model is further described below with reference to the drawings.
Fig. 1 is a schematic structural view of a dc breaker of the present utility model;
fig. 2 is a schematic structural view of the ac circuit breaker of the present utility model;
FIG. 3 is a schematic view of the structure of the housing of the present utility model;
fig. 4 is an exploded view of the tripping mechanism of the dc circuit breaker of the present utility model;
fig. 5 is an exploded view of the tripping mechanism of the ac circuit breaker of the present utility model;
FIG. 6 is a schematic view of the structure of the short strike plate of the present utility model;
FIG. 7 is a schematic view of the structure of the long striking plate of the present utility model;
FIG. 8 is a schematic view of the structure of a first stationary contact according to the present utility model;
fig. 9 is a schematic structural view of a second stationary contact according to the present utility model.
Detailed Description
Referring to fig. 1 to 9, the ac/dc miniature circuit breaker of the present utility model comprises a housing 1, an operating handle 2 pivotally connected to the upper end of the housing 1, and a trip mechanism 3, an electromagnetic coil mechanism 4, a stationary contact and an arc extinguishing chamber 5 disposed in the housing 1. The tripping mechanism 3 comprises a bracket 7 and a lock catch 8 which are coaxially connected to the main mounting shaft 6 of the shell 1, and a tripping buckle 9 which is axially connected to the upper end of the lock catch 8. The jump button 9 is connected with the operating handle 2 through a connecting rod 10. The lower end of the bracket 7 is connected with a movable contact in a shaft way. The power-assisted torsion spring 11 is arranged at the shaft joint of the lock catch 8, the force arm at the lower end of the power-assisted torsion spring 11 acts on the lower end of the lock catch 8, and the force arm at the upper end of the power-assisted torsion spring 11 acts on the upper end of the support 7, so that the sensitivity of the action of the lock catch 8 is improved. The movable contact consists of a long movable contact 14 or a short movable contact 15, wherein the upper ends of the long movable contact 14 or the short movable contact 15 are connected with a power-assisted tension spring 16, and the other end of the power-assisted tension spring 16 is connected with the shell 1 so as to improve the sensitivity of the movement of the long movable contact 14 or the short movable contact 15. The upper end of the long moving contact 14 is provided with a first flexible connection wire welding part 17, and a first abdication space 18 for abdicating the first flexible connection wire welding part 17 is arranged in the shell 1 so as to realize the installation of the long moving contact 14. The middle part of the short moving contact 15 is provided with a second flexible connection wire welding part 19, and a second abdication space 20 for abdicating the second flexible connection wire welding part 19 is arranged in the shell 1 so as to realize the installation of the short moving contact 15. The stationary contact consists of a first stationary contact 21 cooperating with the long moving contact 14 or a second stationary contact 22 compatible with the short moving contact 15. The upper ends of the first fixed contact 21 and the short moving contact 15 are connected with the electromagnetic coil mechanism 4, and the lower ends of the first fixed contact and the short moving contact are provided with hook-shaped arc striking pins which extend into the arc extinguishing chamber 5.
Preferably, the upper end of the long moving contact 14 is provided with a kidney-shaped positioning groove 23 which is matched with the main mounting shaft 6 of the shell 1 in a positioning way. The upper end of the short moving contact 15 is provided with a U-shaped positioning groove 24 which is matched with the main installation shaft 6 in a positioning way. The long moving contact 14 and the short moving contact 15 are positioned through the positioning grooves.
Preferably, the lower end of the housing 1 is provided with a short striking plate 25 adapted to the long moving contact 14, or is provided with a long striking plate 26 adapted to the short moving contact 15, the short striking plate 25 and the long striking plate 26 are both fixed by the cooperation of a first bearing plate 27 and a second bearing plate 28 in the housing 1, and the installation and the fixation of the two types of striking plates are realized by the cooperation of the first bearing plate 27 and the second bearing plate 28.
Preferably, a metal positioning rod 29 for positioning the long moving contact 14 or the short moving contact 15 is provided in the housing 1, and the long moving contact 14 or the short moving contact 15 is positioned after being separated.
Preferably, the upper ends of the short striking plate 25 and the long striking plate 26 are respectively provided with a positioning protruding portion 30, and the positioning protruding portions 30 are respectively matched with a positioning groove 31 in the shell 1 in a positioning manner so as to realize stable installation of the short striking plate 25 and the long striking plate 26.
Preferably, tension spring connecting holes 32 are respectively provided at the upper ends of the long moving contact 14 and the short moving contact 15, so as to facilitate connection of the power-assisted tension springs 16.
Although the present utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the utility model, and the utility model is not limited to the specific embodiments described above, but is intended to cover all modifications, equivalents and alternatives falling within the scope of the utility model.
Claims (7)
1. The utility model provides a dual-purpose miniature circuit breaker of alternating current-direct current, includes casing (1), the coupling in handle (2) of casing (1) upper end and setting tripping device (3), solenoid mechanism (4), stationary contact and explosion chamber (5) in casing (1), tripping device (3) including the coaxial coupling in support (7) and hasp (8) on main installation axle (6) of casing (1) and coupling in jump knot (9) of hasp (8) upper end, jump knot (9) are connected with handle (2) through connecting rod (10), the lower extreme coupling of support (7) has the moving contact, its characterized in that: the power-assisted movable contact comprises a lock catch (8), wherein a power-assisted torsion spring (11) is arranged at the shaft joint of the lock catch (8), a force arm at the lower end of the power-assisted torsion spring (11) acts on the lower end of the lock catch (8), a force arm at the upper end of the lock catch acts on the upper end of the support (7), a movable contact consists of a long movable contact (14) or a short movable contact (15), a power-assisted tension spring (16) is connected to the upper end of the long movable contact (14) or the upper end of the short movable contact (15), a first soft connecting wire welding part (17) is arranged at the upper end of the long movable contact (14), a first yielding space (18) for yielding the first soft connecting wire welding part (17) is arranged in the shell (1), a second soft connecting wire welding part (19) is arranged in the middle of the short movable contact (15), a second yielding space (20) for yielding the second soft connecting wire welding part (19) is arranged in the shell (1), and the movable contact consists of a first soft connecting wire welding part (21) and a second static contact (22) matched with the long movable contact (14).
2. The miniature circuit breaker for both ac and dc of claim 1, wherein: the upper end of the long moving contact (14) is provided with a kidney-shaped positioning groove (23) which is matched with the main installation shaft (6) of the shell (1) in a positioning way.
3. The miniature circuit breaker for both ac and dc of claim 1, wherein: the upper end of the short moving contact (15) is provided with a U-shaped positioning groove (24) matched with the main installation shaft (6) in a positioning way.
4. The miniature circuit breaker for both ac and dc of claim 1, wherein: the shell body (1) lower extreme be equipped with short striking board (25) that long moving contact (14) suited, perhaps be equipped with long striking board (26) that short moving contact (15) suited, short striking board (25), long striking board (26) are all fixed through the cooperation of first joint board (27) and second joint board (28) in shell body (1).
5. The miniature circuit breaker for both ac and dc of claim 1, wherein: a metal positioning rod (29) for positioning the long moving contact (14) or the short moving contact (15) is arranged in the shell (1).
6. The miniature circuit breaker for both ac and dc of claim 4, wherein: the upper ends of the short arc striking plate (25) and the long arc striking plate (26) are respectively provided with a positioning protruding part (30), and the positioning protruding parts (30) are respectively matched with the positioning grooves (31) in the shell (1) in a positioning way.
7. The miniature circuit breaker for both ac and dc of claim 1, wherein: the upper ends of the long moving contact (14) and the short moving contact (15) are respectively provided with a tension spring connecting hole (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321282708.1U CN220021005U (en) | 2023-05-25 | 2023-05-25 | AC/DC miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321282708.1U CN220021005U (en) | 2023-05-25 | 2023-05-25 | AC/DC miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021005U true CN220021005U (en) | 2023-11-14 |
Family
ID=88684123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321282708.1U Active CN220021005U (en) | 2023-05-25 | 2023-05-25 | AC/DC miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021005U (en) |
-
2023
- 2023-05-25 CN CN202321282708.1U patent/CN220021005U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |