CN212010878U - Overload protection mechanism of plug-in circuit breaker - Google Patents
Overload protection mechanism of plug-in circuit breaker Download PDFInfo
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- CN212010878U CN212010878U CN202020723060.7U CN202020723060U CN212010878U CN 212010878 U CN212010878 U CN 212010878U CN 202020723060 U CN202020723060 U CN 202020723060U CN 212010878 U CN212010878 U CN 212010878U
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Abstract
The utility model relates to an overload protection mechanism of bayonet circuit breaker, including bimetallic strip and run-on arc piece, bimetallic strip and run-on arc piece are installed in the casing of circuit breaker, the run-on arc piece is including the first component that connects gradually, the second component, third component and fourth component, first component and fourth component are fixed with the casing, and directly over first component lies in fourth component, second component is connected to the one end of first component, the other end is equipped with atress deformation portion, this atress deformation portion connects bimetallic strip, bimetallic strip lies in between first component and the fourth component. Compared with the prior art, the utility model discloses make full use of the narrow and small space of explosion chamber top for bimetallic strip has great deformation bending space, improves the product dropout stability when the circuit breaker transships.
Description
Technical Field
The utility model belongs to the technical field of the circuit breaker and specifically relates to an overload protection mechanism of bayonet circuit breaker is related to.
Background
Chinese utility model with publication number CN205177745U discloses a circuit breaker overload protection mechanism, which is a typical existing overload protection mechanism for a miniature circuit breaker. The overload protection mechanism generally comprises a bimetallic strip, a connecting piece and an arc striking piece, and plays a role of controlling the opening of the circuit breaker during overload through the design of the structural shape of the overload protection mechanism, so that the circuit is protected. However, for the plug-in circuit breaker, due to the long rectangular special housing structure, the existing overload protection mechanism structure cannot play a good overload tripping role. In particular, in the case of the plug-in circuit breaker, the height and width of the housing are limited, and the arc striking plate of the overload protection mechanism needs to be matched with the arc extinguishing chamber, so that the deformation space of the bimetal is greatly limited, and the tripping stability of the circuit breaker during overload is affected.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the above-mentioned drawbacks of the prior art and to provide an overload protection mechanism for a plug-in circuit breaker.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides an overload protection mechanism of bayonet circuit breaker, includes bimetallic strip and run-on arc piece, bimetallic strip and run-on arc piece install in the casing of circuit breaker, the run-on arc piece including the first component, second component, third component and the fourth component that connect gradually, first component and fourth component fixed with the casing, and first component be located fourth component directly over, the one end of first component connect the second component, the other end is equipped with atress deformation portion, this atress deformation portion connects the bimetallic strip, the bimetallic strip be located between first component and the fourth component.
Furthermore, a wing plate is arranged in the middle of the first component and used for being connected with a clamping groove in the shell for fixing.
Further, the wing plates are symmetrically arranged on two sides of the first component.
Furthermore, the shell is provided with a mounting plate which is positioned above an arc extinguish chamber of the circuit breaker and forms a gap with the top of the arc extinguish chamber, and the fourth component is inserted into the gap for fixing.
Furthermore, the joint of the third component and the fourth component is folded inwards to form an arc striking angle.
Furthermore, the angle range of the arc ignition angle is 110-145 degrees.
Further, the atress deformation portion tail end is equipped with the rectangular board, the one end of rectangular board is connected and is connected the atress deformation portion body perpendicularly, and the one end of bimetallic strip is welded to the other end, the other end of bimetallic strip is crisscross to pass the second component for connect the operating device of circuit breaker.
And the bottom end of the adjusting bolt is propped against one end of the strip plate connecting with the stress deformation part body.
Furthermore, the joints of the first component, the second component, the third component and the fourth component are all in smooth transition.
Furthermore, the stressed deformation part is connected with an incoming terminal of the circuit breaker through a lead.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a set up bimetallic strip into bilayer structure to fix with the casing respectively, set up bimetallic strip in bilayer structure's mid portion, make full use of the narrow and small space of explosion chamber top, make bimetallic strip have great deformation bending space, improve the product dropout stability when the circuit breaker transships.
2. The first component of the utility model is fixed with the shell through the arrangement of the wing plate, the structure is simple, and the manufacture and the production are easy; the bilateral wing plate further improves the stability of the structure.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an installation schematic diagram of the present invention.
Reference numerals: 1. the double-metal-strip-type arc striking mechanism comprises a double-metal strip 2, an arc striking strip 21, a first component 21a, a stress deformation part 21b, a strip plate 21c, a wing plate 22, a second component 23, a third component 24, a fourth component 3, a shell 31, a mounting plate 4, an arc extinguishing chamber 5, an arc striking angle 6, an adjusting bolt 7, an operating mechanism 8 and a wire inlet terminal.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, the present embodiment provides an overload protection mechanism of a plug-in circuit breaker, which includes a bimetal 1 and an arc runner 2, and the bimetal and the arc runner 2 are installed in a housing 3 of the circuit breaker.
The arc striking plate 2 comprises a first component 21, a second component 22, a third component 23 and a fourth component 24 which are connected in sequence. The first component 21 and the fourth component 24 are fixed to the housing 3, and the first component 21 is located directly above the fourth component 24. Specifically, the method comprises the following steps: a wing plate 21c is arranged in the middle of the first component 21 and is used for being connected with a clamping groove on the shell 3 for fixing; the symmetrical location of the wings 21c on both sides of the first component 21 improves the structural stability. The shell 3 is provided with a mounting plate 31, and the mounting plate 31 is positioned above the arc extinguish chamber 4 of the circuit breaker and forms a gap with the top of the arc extinguish chamber 4; the fourth component 24 is inserted into the gap and fixed. The left end of the fourth component 24 is connected with a third component 23, and the third component 23 is bent downwards to form an arc striking angle 5. The arc ignition angle 5 is generally 110 to 145 degrees, and in this embodiment, 120 degrees is adopted. The right end of the third component 23 is connected to the right end of the first component 21 via the second component 22. The joints of the first component 21, the second component 22, the third component 23 and the fourth component 24 are all in smooth transition.
A force receiving deformation portion 21a is provided at the left end of the first component portion 21. The left end of the force-receiving deformation portion 21a is a tail end, and a long strip 21b is provided at the tail end. The rear end of the long strip plate 21b is connected with the body of the vertical connection stress deformation part 21a, and the right end of the bimetallic strip 1 is welded at the front end. The left end of the bimetal 1 crosses the second component 22 in a staggered manner for connection to the operating mechanism 7 of the circuit breaker. From this, bimetallic strip 1 is located between first component 21 and fourth component 24, make full use of the narrow and small space of explosion chamber 4 top for bimetallic strip 1 has great crooked space of deformation, improves the product dropout stability that the circuit breaker transships. The strip 21b is connected to the line inlet terminal 8 of the circuit breaker by a wire.
The present embodiment further includes an adjusting bolt 6, and the adjusting bolt 6 is mounted on the housing 3, and the bottom end thereof abuts against the strip 21b to connect with the rear end of the body of the force-receiving deformation portion 21a for adjusting the mounting position of the bimetal 1.
The working principle of the embodiment is as follows: when the breaker generates overload current, the stress deformation part 21a and the bimetallic strip 1 are heated and deflected to drive the trip rod of the operating mechanism 7 to slide, so that the breaker is opened to play a role in overload protection.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. An overload protection mechanism of a plug-in circuit breaker comprises a bimetallic strip (1) and an arc striking strip (2), the bimetallic strip (1) and the arc striking strip (2) are arranged in a shell (3) of the circuit breaker, it is characterized in that the arc striking sheet (2) comprises a first component (21), a second component (22), a third component (23) and a fourth component (24) which are connected in sequence, the first component (21) and the fourth component (24) are fixed with the shell (3), and the first component (21) is positioned right above the fourth component (24), one end of the first component part (21) is connected with the second component part (22), the other end is provided with a stress deformation part (21a), the stressed deformation part (21a) is connected with the bimetallic strip (1), and the bimetallic strip (1) is positioned between the first component part (21) and the fourth component part (24).
2. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the first component (21) is provided with wings (21c) in the middle for fastening with notches in the housing (3).
3. Overload protection mechanism for a plug-in circuit breaker according to claim 2, characterised in that the wings (21c) are symmetrically located on either side of the first component (21).
4. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the housing (3) is provided with a mounting plate (31), which mounting plate (31) is located above the arc chute (4) of the circuit breaker and forms a gap with the top of the arc chute (4), into which gap the fourth component (24) is inserted for fixation.
5. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the junction between the third component (23) and the fourth component (24) is folded inwards to form an arc run angle (5).
6. Overload protection mechanism for a plug-in circuit breaker according to claim 5, characterised in that the angle of the run-on angle (5) is in the range of 110-145 degrees.
7. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the end of the force-receiving deformation (21a) is provided with a strip (21b), one end of the strip (21b) is connected to the body of the force-receiving deformation (21a) and the other end is welded to one end of the bimetal (1), the other end of the bimetal (1) is crossed through the second component (22) for connection to the operating mechanism (7) of the circuit breaker.
8. Overload protection mechanism for a plug-in circuit breaker according to claim 7, characterised in that it further comprises an adjusting bolt (6), the adjusting bolt (6) being mounted on the housing (3) with its bottom end against the end of the strip (21b) where the body of the force-receiving deformation (21a) is attached.
9. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the junctions of the first (21), second (22), third (23) and fourth (24) components are all rounded transitions.
10. Overload protection mechanism for a plug-in circuit breaker according to claim 1, characterised in that the force-receiving deformation (21a) is connected to the inlet terminal (8) of the circuit breaker by means of a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020723060.7U CN212010878U (en) | 2020-05-06 | 2020-05-06 | Overload protection mechanism of plug-in circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020723060.7U CN212010878U (en) | 2020-05-06 | 2020-05-06 | Overload protection mechanism of plug-in circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212010878U true CN212010878U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020723060.7U Active CN212010878U (en) | 2020-05-06 | 2020-05-06 | Overload protection mechanism of plug-in circuit breaker |
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| Country | Link |
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| CN (1) | CN212010878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464506A (en) * | 2022-02-25 | 2022-05-10 | 江西航同电气科技有限公司 | Plug-in circuit breaker hot adjustment system assembly |
-
2020
- 2020-05-06 CN CN202020723060.7U patent/CN212010878U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464506A (en) * | 2022-02-25 | 2022-05-10 | 江西航同电气科技有限公司 | Plug-in circuit breaker hot adjustment system assembly |
| CN114464506B (en) * | 2022-02-25 | 2024-04-12 | 江西航同电气科技有限公司 | Plug-in circuit breaker thermal regulation system assembly |
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