CN220400523U - Miniature leakage circuit breaker - Google Patents

Abstract

The utility model relates to a miniature electric leakage circuit breaker, it is including the casing, is provided with the tripping device in the casing to and the operating unit who links with the tripping device for trigger the tripping device and carry out the release action when electric leakage, or short circuit trouble take place for the circuit, arc extinguishing chamber that the electric arc that produces when being used for accelerating the release extinguishes, and overload protection subassembly. The utility model has the design that adopts two explosion chambers, can realize 18mm zero line and phase line's independent arc extinction, adopt electron release and the protection of the electromagnetic dual drive principle of crossing the coil integrated structure to can realize leakage protection and short-circuit protection, can assemble N and L moving contact simultaneously on the swinging member, the swinging member adopts integrated into one piece structure, has reduced the plastic deformation and has brought the harmful effects to closing a floodgate and separating brake speed, adopts the package assembly to simplify, and is small, promotes the production speed and falls this efficiency-increasing, produces economic benefits's effect.

Description

Miniature leakage circuit breaker

Technical Field

The application relates to the technical field of circuit breakers, in particular to a miniature leakage circuit breaker.

Background

The current miniature leakage circuit breaker mainly comprises an operation assembly, a release, a moving contact, a static contact, a release assembly and an arc extinguishing assembly. The operation assembly can be used for manual switching-on or switching-off by a user, when the operation assembly controls the tripping assembly to be in a switching-on state, the movable contact is locked at a switching-on position, and the movable contact and the fixed contact are contacted with each other and conduct the main circuit; when the circuit is short-circuited or severely overloaded, the tripping mechanism is triggered under the pushing of the tripping device, and at the moment, the moving contact is rapidly separated from the fixed contact under the driving of the tripping mechanism, so that the main circuit is rapidly cut off.

In the related art, a miniature leakage breaker exists, and a tripping assembly of the miniature leakage breaker at least comprises more than four plastic parts, wherein the plastic parts are mutually matched; the more plastic parts are adopted by the tripping assembly, the more complex the matching relation among the plastic parts is, and the more complicated the assembly steps are; in addition, as the plastic material has the characteristic of plastic deformation, once any plastic part in the tripping assembly is deformed, the opening and closing speed of the tripping assembly can be directly influenced.

Disclosure of Invention

The utility model provides a miniature electric leakage circuit breaker has reduced the volume of tripping device through simplifying the structure of tripping device, has convenient assembling, and assembly efficiency is high, has optimized the assembly flow, has practiced thrift manufacturing cost's effect.

The application provides a miniature electric leakage circuit breaker adopts following technical scheme:

the miniature leakage breaker comprises a shell, wherein a tripping assembly and an operating assembly which is in linkage with the tripping assembly are arranged in the shell; the tripping component comprises a swinging piece and a tripping piece, wherein the swinging piece is rotatably arranged on the inner side wall of the shell, and the tripping piece is rotatably arranged on the swinging piece; the swing piece is integrally formed with a plug-in column, and the swing piece is fixedly provided with a moving contact in a plug-in manner through the plug-in column; and a limiting piece for limiting the brake contact to rotate on the plug-in column is integrally formed on the swinging piece, and the limiting piece is mutually abutted with the outer side wall of the moving contact.

By adopting the technical scheme: the number of plastic parts is reduced, and the assembly structure is optimized, so that the whole volume of the tripping assembly is reduced, the production speed is improved, the cost reduction and synergy are realized, and the economic benefit is generated; when the movable contact is installed, one end of the movable contact is fixedly inserted on the inserting column, and then the movable contact is limited by the limiting piece, so that the rotation of the movable contact on the swinging piece can be effectively limited, and the movable contact and the swinging piece can swing synchronously; the integrally formed swinging piece is adopted, so that the assembly is convenient, the assembly efficiency can be improved, the assembly flow is optimized, and the production cost is saved.

Preferably, the plug-in column is sleeved with a torsion spring, one end of the torsion spring is abutted against the limiting piece, the other end of the torsion spring is abutted against the moving contact, and the torsion spring is used for pressing the moving contact on the outer side wall of the limiting piece.

By adopting the technical scheme: the moving contact can be pressed on the outer side wall of the limiting part more stably and firmly under the heavy pressure of the torsion spring, compared with the traditional mode of screwing and dispensing, the moving contact is fixed, the assembly process can be greatly simplified by adopting the mode of torsion spring fixation, and meanwhile, the assembly efficiency is improved, so that the assembly process of the moving contact is more convenient and rapid.

Preferably, an inclined plane is formed on the limiting piece, and the end part of the torsion spring is pressed on the inclined plane; and the limiting piece is also integrally formed with a stop block for limiting the end part of the torsion spring to separate from the inclined surface.

Preferably, a release is further arranged in the shell, and an overcurrent coil is coaxially sleeved outside the release; still be provided with the mounting bracket in the casing, the release erects on the mounting bracket, be formed with on the mounting bracket and hold the chamber, it is spacing in holding the intracavity to cross the streamline ring.

Preferably, the operation assembly comprises a handle rotatably arranged in the shell, a linkage rod with one end arranged on the handle and an energy storage tension spring; one end of the linkage rod, which is far away from the handle, is inserted on the swinging member, one end of the energy storage tension spring is arranged on the mounting frame, and the other end of the energy storage tension spring is arranged on the swinging member.

Preferably, the moving contacts on the swinging member are provided with two groups, and the two groups of moving contacts are symmetrically arranged at two sides of the swinging member; two groups of mutually independent arc-extinguishing chambers are arranged in the shell, and the arc-extinguishing chambers face to the moving contacts which are opposite to each other respectively.

Preferably, the overload protection device further comprises an overload protection assembly arranged in the shell, wherein the overload protection assembly comprises a bimetallic strip and a trigger piece; the bimetallic strip is used for being communicated with a circuit, one end of the trigger piece is arranged on the trip piece, and the other end of the trigger piece is positioned on a path of the bimetallic strip which is heated and bent.

Preferably, a limit baffle plate positioned between the bimetallic strip and the arc extinguish chamber is arranged in the shell, the limit baffle plates are oppositely arranged, and one end of the bimetallic strip is limited between the opposite limit baffle plates.

Preferably, the two sides of the shell are symmetrically provided with wiring terminals, and the wiring terminals positioned on the same side of the shell are arranged in a staggered manner.

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

the independent arc extinction of the zero line and the phase line with the length of 18mm can be realized by adopting the design of the double arc-extinguishing chambers;

the electromagnetic double-driving principle protection is adopted, and thus the leakage protection and the short-circuit protection can be realized;

the swing piece can be provided with the N and L moving contacts at the same time, and adopts an integrated structure, so that adverse effects of plastic deformation on closing and opening speeds are reduced;

adopting a two-section arc extinguishing structure, wherein the first section of arc extinguishing chamber is electrically repulsive, and the second section of arc extinguishing chamber is electrically repulsive;

the energy storage tension spring can be used for realizing quick brake separation;

the assembly structure is simplified, the volume is small, the production speed is improved, the cost is reduced, the efficiency is improved, and the economic benefit is generated;

the wiring terminal adopts forward and reverse wiring design, can prevent that the user from connecting wrong line, causes the product to be unable to use.

Drawings

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

FIG. 2 is a schematic view showing the overall structure of the inside of the housing;

FIG. 3 is a schematic view of a portion of the operation assembly and overload protection assembly shown in FIG. 2;

FIG. 4 is a schematic exploded view of a portion of the structure of the salient trip assembly of FIG. 3;

fig. 5 is a schematic view showing the structure of the swing member of fig. 4.

Reference numerals illustrate: 1. a housing; 10. a mounting frame; 11. a receiving chamber; 2. a trip assembly; 20. a swinging member; 21. removing the fastener; 22. a plug-in column; 23. a moving contact; 230. a plug hole; 231. a contact surface; 24. a limiting piece; 240. an inclined surface; 241. a stop block; 242. a limiting surface; 25. a torsion spring; 3. an operating assembly; 31. a handle; 32. a linkage rod; 33. an energy storage tension spring; 4. a trip; 40. a through-flow coil; 5. an arc extinguishing chamber; 6. an overload protection assembly; 60. bimetallic strips; 61. a trigger; 7. a limit baffle; 8. and a connection terminal.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, unless otherwise specified, the term "/" generally indicates that the associated object is an "or" relationship.

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

The embodiment of the application discloses a miniature leakage breaker.

Referring to fig. 1 and 2, a miniature leakage breaker includes a casing 1 capable of being spliced with each other, a trip assembly 2 and an operation assembly 3 linked with the trip assembly 2 are disposed in the casing 1, a tripper 4 for triggering the trip assembly 2 to perform a switching-off action when a leakage or short-circuit fault occurs in a circuit, an arc extinguishing chamber 5 for accelerating arc extinction generated during switching-off, and an overload protection assembly 6 for triggering the trip assembly 2 to perform a switching-off action when an overload occurs in the circuit.

As shown in fig. 3 and 4, the trip assembly 2 includes a swing member 20 rotatably disposed on an inner sidewall of the housing 1, and a trip member 21 rotatably disposed on the swing member 20. The outer side walls of the swinging piece 20, which are away from each other, are integrally formed with plug-in posts 22, and the plug-in posts 22 are symmetrically formed on two sides of the swinging piece 20. The swing piece 20 is respectively inserted and fixed with a movable contact 23 through the two side inserting posts 22, an inserting hole 230 for inserting the inserting posts 22 is penetrated through the movable contact 23, and the movable contact 23 is inserted and fixed on the respective inserting post 22 through the inserting hole 230. The swinging member 20 can meet the requirement of simultaneously assembling two groups of N and L moving contacts 23 through the plug-in posts 22 on two sides. And the swinging piece 20 and the plug-in column 22 are integrally formed, so that the number of plastic parts is reduced, and the adverse effect of plastic deformation on closing and opening speeds can be greatly reduced.

As shown in fig. 4 and 5, the swing member 20 is further integrally formed with a stopper 24 for restricting the rotation of the brake contact 23 on the plug post 22, and the stoppers 24 face the respective opposite movable contacts 23. The side wall of the limiting piece 24 facing each moving contact 23 is provided with a limiting surface 242, and the outer side wall of the moving contact 23 facing the limiting surface 242 is provided with a contact surface 231 for mutually abutting with the limiting surface 242. When the movable contact 23 is mounted on the plug-in post 22, the rotation of the movable contact 23 on the plug-in post 22 can be effectively limited by the mutual lamination of the limiting surface 242 and the contact surface 231, so that the stability of the movable contact 23 is ensured.

As shown in fig. 3 and 4, the plug-in post 22 is sleeved with a torsion spring 25, one end of the torsion spring 25 is mutually abutted against the outer side wall of the limiting piece 24, and the other end of the torsion spring 25 is mutually abutted against the moving contact 23. The contact surface 231 of the moving contact 23 can be pressed on the limiting surface 242 more stably and firmly under the heavy pressure of the torsion spring 25. Compared with the traditional mode of screwing and dispensing, the movable contact 23 is fixed, the mode of fixing by the torsion spring 25 can greatly simplify the assembly process, and meanwhile, the assembly efficiency is improved, so that the whole assembly process of the movable contact 23 is more convenient and quicker.

As shown in fig. 3 and 5, the limiting member 24 is further formed with an inclined surface 240, and one end of the torsion spring 25, which is far away from the moving contact 23, is pressed against the inclined surface 240. The stopper 24 is further integrally formed with a stopper 241 for restricting the end of the torsion spring 25 from being separated from the inclined surface 240, and the stopper 241 is located at a side of the inclined surface 240 away from the swing member 20.

As shown in fig. 2 and 3, the release 4 may be electromagnetic or electronic, the outside of the release 4 is coaxially sleeved with an overcurrent coil 40, the housing 1 is further provided with a mounting frame 10, and the release 4 is mounted on the mounting frame 10. The mounting frame 10 is formed with a receiving chamber 11, and the overcurrent coil 40 is limited in the receiving chamber 11. The integrated structure of the release 4 and the overcurrent coil 40 is adopted, so that the assembly work is convenient, and the leakage protection and the short-circuit protection of a circuit can be realized.

As shown in fig. 2 and 3, the operation unit 3 includes a handle 31 rotatably provided in the housing 1, a link lever 32 for establishing a link between the handle 31 and the swinging member 20, and an energy storage tension spring 33. One end of the linkage rod 32 is inserted and rotated on the handle 31, and the other end of the linkage rod 32 is inserted and rotated on the swing member 20. One end of an energy storage tension spring 33 is fixed on the outer side wall of the mounting frame 10, the other end of the energy storage tension spring 33 is fixedly arranged on the swinging member 20, and quick opening can be realized through the energy storage tension spring 33.

As shown in fig. 2 and 3, the trip element 21 is located between two sets of moving contacts 23, and one end of the trip element 21 is opposite to the trigger end of the trip device 4. When the operating assembly 3 drives the tripping assembly 2 to rotate to a closing state, the moving contacts 23 at the two sides are contacted with the respective opposite fixed contacts, and the circuit is conducted. When the circuit is in electric leakage or short circuit, the trigger end of the release 4 pushes the release member 21 to move away from the release 4, at this time, the release assembly 2 will perform release action under the tensile force of the energy storage tension spring 33, the swinging member 20 will simultaneously drive the moving contacts 23 on two sides to separate from the respective opposite fixed contacts, at this time, the circuit is cut off, and the cutting speed is high.

As shown in fig. 2 and 3, two groups of mutually independent arc-extinguishing chambers 5 are arranged in the shell 1, and the arc-extinguishing chambers 5 face the moving contacts 23 respectively. The arc extinguishing chamber 5 can accelerate and extinguish the arc generated when the movable contact 23 and the fixed contact are separated. Adopt the design of two explosion chambers 5, can realize 18mm zero line and the independent arc extinction of phase line, ensured the arc extinguishing effect.

As shown in fig. 2 and 3, the overload protection assembly 6 includes a bimetal 60 and a trigger member 61, wherein the bimetal 60 is used for connecting with a circuit. One end of the trigger 61 is inserted into and rotatably disposed on the trip member 21, and the other end of the trigger 61 is located on a path along which the bimetal 60 is bent by heat. The bi-metallic strip 60 is a composite material composed of two or more metals or other materials having suitable properties. Due to the different thermal expansion coefficients of the component layers, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetallic strip 60 bends towards the passive layer, and the curvature of the composite material changes to generate deformation.

When the circuit is overloaded, the bimetal 60 is bent by heat and is bent towards the direction close to the trigger piece 61, and when the trigger piece 61 is pushed by the bimetal 60, the trigger piece 61 drives the trip piece 21 to complete trip, and at this time, the circuit is cut off.

As shown in fig. 2, a limit baffle 7 is further disposed in the housing 1 and located between the bimetal 60 and the arc extinguishing chamber 5, the limit baffles 7 are disposed opposite to each other, and one end of the bimetal 60 is limited between the opposite limit baffles 7. The bimetal 60 is limited in the housing 1 by a limit baffle 7. The limit stop 7 also guides the generated arc into the arc-extinguishing chamber 5. The two-section arc extinguishing structure is adopted, the first section of electric repulsive force is adopted, and the second section adopts the arc extinguishing chamber 5 to conduct arc extinguishing.

As shown in fig. 1 and 2, the two sides of the casing 1 are symmetrically provided with the connecting terminals 8, the two groups of connecting terminals 8 located on the same side of the casing 1 are arranged in a staggered manner, and the forward and reverse wiring design is adopted, so that the situation that a user connects a wrong wire and a product cannot be used can be prevented.

The implementation principle is as follows: the number of plastic parts is reduced, and the assembly structure is optimized, so that the whole volume of the tripping assembly 2 is reduced, the production speed is improved, the cost reduction and synergy are realized, and the economic benefit is generated; when the movable contact 23 is installed, one end of the movable contact 23 is fixedly inserted into the insertion column 22, and then the movable contact 23 is limited by the limiting piece 24, so that the rotation of the movable contact 23 on the swinging piece 20 can be effectively limited, and the movable contact 23 and the swinging piece 20 can swing synchronously. The integrally formed swinging piece 20 is convenient to assemble, the assembly efficiency can be improved, the assembly flow is optimized, and the production cost is saved.

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 (9)

1. The miniature electric leakage breaker comprises a shell (1), wherein a tripping assembly (2) and an operating assembly (3) which is in linkage with the tripping assembly (2) are arranged in the shell (1); the method is characterized in that: the tripping assembly (2) comprises a swinging piece (20) rotatably arranged on the inner side wall of the shell (1), and a tripping piece (21) rotatably arranged on the swinging piece (20); an inserting column (22) is integrally formed on the swinging piece (20), and a moving contact (23) is fixedly inserted on the swinging piece (20) through the inserting column (22); and a limiting piece (24) for limiting the rotation of the brake contact (23) on the plug-in column (22) is further integrally formed on the swinging piece (20), and the limiting piece (24) is mutually abutted with the outer side wall of the moving contact (23).

2. The miniature earth leakage breaker of claim 1, wherein: the plug post (22) is sleeved with a torsion spring (25), one end of the torsion spring (25) is abutted against the limiting piece (24), the other end of the torsion spring (25) is abutted against the moving contact (23), and the torsion spring (25) is used for tightly pressing the moving contact (23) on the outer side wall of the limiting piece (24).

3. The miniature earth leakage breaker of claim 2, wherein: an inclined surface (240) is formed on the limiting piece (24), and the end part of the torsion spring (25) is pressed on the inclined surface (240); the limiting piece (24) is also integrally formed with a stop dog (241) for limiting the end part of the torsion spring (25) to be separated from the inclined surface (240).

4. A miniature earth leakage breaker according to claim 3, characterized in that: a release (4) is further arranged in the shell (1), and an overcurrent coil (40) is coaxially sleeved outside the release (4); still be provided with mounting bracket (10) in casing (1), release (4) erect on mounting bracket (10), be formed with on mounting bracket (10) and hold chamber (11), it is spacing in holding chamber (11) to cross streamlined ring (40).

5. A miniature earth leakage breaker according to claim 3, characterized in that: the operation assembly (3) comprises a handle (31) rotatably arranged in the shell (1), a linkage rod (32) with one end arranged on the handle (31) and an energy storage tension spring (33); one end of the linkage rod (32) far away from the handle (31) is inserted into the swinging piece (20), one end of the energy storage tension spring (33) is arranged on the mounting frame (10), and the other end of the energy storage tension spring (33) is arranged on the swinging piece (20).

6. The miniature earth leakage breaker of claim 1, wherein: two groups of moving contacts (23) are arranged on the swinging piece (20), and the two groups of moving contacts (23) are symmetrically arranged on two sides of the swinging piece (20); two groups of mutually independent arc-extinguishing chambers (5) are arranged in the shell (1), and the arc-extinguishing chambers (5) face to the moving contacts (23) which are opposite to each other respectively.

7. The miniature earth leakage breaker of claim 6, wherein: the overload protection device further comprises an overload protection assembly (6) arranged in the shell (1), wherein the overload protection assembly (6) comprises a bimetallic strip (60) and a trigger piece (61); the bimetallic strip (60) is used for being communicated with a circuit, one end of the trigger piece (61) is arranged on the tripping piece (21), and the other end of the trigger piece (61) is positioned on a path of the bimetallic strip (60) which is heated and bent.

8. The miniature earth leakage breaker of claim 7, wherein: still be provided with limit baffle (7) between bimetallic strip (60) and explosion chamber (5) in casing (1), limit baffle (7) are relative setting, bimetallic strip (60) one end is spacing between relative limit baffle (7).

9. The miniature earth leakage breaker of claim 1, wherein: binding post (8) are symmetrically arranged on two sides of the shell (1), and binding posts (8) located on the same side of the shell (1) are arranged in a staggered mode.