CN213242460U

CN213242460U - Bipolar high-breaking miniature circuit breaker

Info

Publication number: CN213242460U
Application number: CN202022494871.7U
Authority: CN
Inventors: 郑旭腾; 潘伟杰
Original assignee: Shanghai Fanatong Electron Co ltd
Current assignee: Shanghai Fanatong Electron Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-05-18
Anticipated expiration: 2030-11-02

Abstract

The utility model provides a bipolar high-breaking miniature circuit breaker, which comprises a shell, an electromagnetic tripping mechanism, an arc extinguishing mechanism and a contact operating mechanism, wherein the electromagnetic tripping mechanism, the arc extinguishing mechanism and the contact operating mechanism are arranged in the shell; the lower ends of the first static contact and the second static contact, which are close to one side of the arc extinguish chamber, are provided with extended arc leading tails, so that the arc can be led to the arc extinguish chamber. A plurality of grid pieces are distributed on one side of the arc extinguish chamber, grid grooves are formed among the grid pieces at intervals, and an electric arc discharge port is formed in one side, corresponding to the grid grooves, of the square cavity, so that gas can be discharged quickly, and electric arc extinguishing is facilitated.

Description

Bipolar high-breaking miniature circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field specifically is a bipolar high divides disconnected miniature circuit breaker.

Background

The miniature circuit breaker is a commonly used electric switch, is mainly used in various places such as industry, commerce, civil residence and the like, can not only break and connect normal load current, but also automatically cut off the line when the line has faults such as overload, short circuit and the like, thereby protecting personal and property safety.

Miniature circuit breaker includes casing, electromagnetism tripping device, arc extinguishing mechanism and contact operating device, and the structural design of current miniature circuit breaker's arc extinguishing system is unreasonable, leads to this miniature circuit breaker's arc extinguishing effect ideal inadequately, and breaking capacity is relatively poor, and life is shorter.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the present invention is to provide a bipolar high breaking miniature circuit breaker to solve the problems in the background art.

The utility model provides a technical problem adopt following technical scheme to realize: a bipolar high-breaking miniature circuit breaker comprises a shell, an electromagnetic tripping mechanism, an arc extinguishing mechanism and a contact operating mechanism, wherein the electromagnetic tripping mechanism, the arc extinguishing mechanism and the contact operating mechanism are arranged in the shell;

the contact operating mechanism is of a bipolar linkage structure and comprises a handle, a buckle assembly, a first contact frame, a second contact frame, a first fixed contact and a second fixed contact, wherein the buckle assembly is connected with the handle for linkage, the first contact frame and the second contact frame are in synchronous transmission connection with the buckle assembly, and the first fixed contact and the second fixed contact are arranged at corresponding positions of the base.

As a further aspect of the present invention: the buckle assembly comprises a connecting rod, a jump buckle and a lock catch, the handle is connected with the jump buckle through the connecting rod, the jump buckle is rotatably arranged on the positioning shaft, the lower end of the jump buckle is connected with the lock catch, the lower end of the lock catch is connected with a first contact rack and a second contact rack, and the first contact rack and the second contact rack are respectively rotatably arranged on the positioning shaft and are positioned at two ends of the jump buckle.

As a further aspect of the present invention: the inner side end of the lock catch is provided with a torsion buckle, and the torsion buckle is elastically connected with the spring and used for releasing the power of jumping of the lock catch.

As a further aspect of the present invention: electromagnetic tripping device includes yoke and coil and the iron core subassembly of setting on the yoke, and the coil winding cup joints on the yoke, iron core subassembly includes the iron core sleeve pipe and sets up moving iron core, quiet iron core and ejector pin in the iron core sleeve pipe, ejector pin one end with move the iron core and be connected, the other end stretches out after passing quiet iron core.

As a further aspect of the present invention: arc extinguishing mechanism is including setting up explosion chamber in the base, setting up the striking piece at the explosion chamber lower extreme, it is equipped with the square cavity of placing to correspond the explosion chamber in the base, and one side distribution of explosion chamber has a plurality of bars pieces, and the interval forms the grid groove between the bar piece, and one side that square cavity corresponds the grid groove is equipped with the electric arc eduction port.

As a further aspect of the present invention: the middle of the square cavity is provided with a middle clapboard which divides the square cavity into two parts.

As a further aspect of the present invention: and extended arc-leading tails are arranged at the lower ends of the first static contact and the second static contact, which are close to one side of the arc extinguish chamber.

Compared with the prior art, the beneficial effects of the utility model are that: the handle drives the trip buckle through the connecting rod, the trip buckle is buckled with the lock buckle, the lower end of the lock buckle pushes the first contact frame and the second contact frame to rotate, the first moving contact is in contact with the first fixed contact, the second moving contact is in contact with the second fixed contact, the handle continues to apply force, and after the connecting rod passes through the vector point, closing is completed. The lower ends of the first static contact and the second static contact, which are close to one side of the arc extinguish chamber, are provided with extended arc leading tails, so that the arc can be led to the arc extinguish chamber. A plurality of grid pieces are distributed on one side of the arc extinguish chamber, grid grooves are formed among the grid pieces at intervals, and an electric arc discharge port is formed in one side, corresponding to the grid grooves, of the square cavity, so that gas can be discharged quickly, and electric arc extinguishing is facilitated.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic structural view of a contact operating mechanism of the present invention;

FIG. 4 is a schematic structural view of the buckle assembly of the present invention;

the following are marked in the figure: 1. a housing; 11. a base; 21. a handle; 22. a first contact holder; 23. a second contact holder; 24. a first fixed contact; 25. a second fixed contact; 26. a first moving contact; 27. a second moving contact; 31. a connecting rod; 32. jumping and buckling; 33. locking; 34. positioning the shaft; 35. twisting and buckling; 41. an arc extinguishing chamber; 42. an arc striking sheet; 43. a grid sheet; 44. an arc discharge port; 45. a middle partition plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the specific drawings.

As shown in FIGS. 1-4,

the embodiment provides a bipolar high-breaking miniature circuit breaker, which comprises a shell 1, and an electromagnetic tripping mechanism, an arc extinguishing mechanism and a contact operating mechanism which are arranged in the shell 1, wherein the electromagnetic tripping mechanism, the arc extinguishing mechanism and the contact operating mechanism are arranged on a base 11 of the shell 1, the contact operating mechanism is in linkage arrangement with the electromagnetic tripping mechanism, and the arc extinguishing mechanism is arranged in a square cavity at the lower end of the base 11; the contact operating mechanism is a bipolar linkage structure, and comprises a handle 21, a buckle assembly connected with the handle 21 for linkage, a first contact frame 22 and a second contact frame 23 which are in synchronous transmission connection with the buckle assembly, and a first fixed contact 24 and a second fixed contact 25 which are arranged at corresponding positions of the base 11, wherein a first movable contact 26 is fixed at the lower end of the first contact frame 22 in a clamped manner, the first movable contact 26 is arranged opposite to the first fixed contact 24, a second movable contact 27 is fixed at the lower end of the second contact frame 23 in a clamped manner, and the second movable contact 27 is arranged opposite to the second fixed contact 25.

In this embodiment, the buckle assembly includes a connecting rod 31, a jump buckle 32 and a lock catch 33, the handle 21 is connected to the jump buckle 32 through the connecting rod 31, the jump buckle 32 is rotatably disposed on a positioning shaft 34, a lower end of the jump buckle 32 is connected to the lock catch 33, a lower end of the lock catch 33 is connected to the first contact frame 22 and the second contact frame 23, and the first contact frame 22 and the second contact frame 23 are respectively rotatably disposed on the positioning shaft 34 and located at two ends of the jump buckle 32. The inner side end of the lock catch 33 is provided with a torsion buckle 35, and the torsion buckle 35 is elastically connected with a spring and used for driving the lock catch 33 to trip and jump. Specifically, the handle 21 drives the trip 32 through the connecting rod 31, the trip 32 is buckled with the buckle 33, the lower end of the buckle 33 pushes the first contact frame 22 and the second contact frame 23 to rotate, so that the first movable contact 26 is in contact with the first fixed contact 24, the second movable contact 27 is in contact with the second fixed contact 25, the handle 21 continues to apply force, and the closing is completed after the connecting rod 31 crosses the sagittal point.

In this embodiment, electromagnetic tripping device includes the yoke and sets up coil and iron core subassembly on the yoke, and the coil winding cup joints on the yoke, iron core subassembly includes the iron core sleeve pipe and sets up moving iron core, quiet iron core and the ejector pin in the iron core sleeve pipe, ejector pin one end with move the iron core and be connected, the other end stretches out after passing quiet iron core. Specifically, when the current in the coil is too large, the coil generates a magnetic field, the core assembly extends out under the driving of the magnetic force of the ejector rod, the ejector rod abuts against the latch 33, so that the latch 33 is disengaged from the trip 32, the latch 33 is ejected out under the action of the spring and drives the first moving contact 26 and the second moving contact 27 to rotate, so that the first moving contact 26 and the first fixed contact 24 are disconnected, and the second moving contact 27 and the second fixed contact 25 are disconnected. The lower ends of the first static contact 24 and the second static contact 25 close to the arc extinguish chamber 41 are provided with extended arc leading tails, which is beneficial to leading the electric arc to the arc extinguish.

In this embodiment, the arc extinguishing mechanism includes the explosion chamber 41 that sets up in base 11, sets up the striking plate 42 at the explosion chamber 41 lower extreme, correspond explosion chamber 41 in base 11 and be equipped with the square cavity of placing, a plurality of bars 43 have been distributed to one side of explosion chamber 41, and the interval forms the grid groove between the grid 43, and one side that the square cavity corresponds the grid groove is equipped with electric arc discharge outlet 44.

In this embodiment, the middle of the square cavity is provided with the middle partition plate 45, and the square cavity is divided into two parts by the middle partition plate 45, so that the double-pole area is isolated, and the arc extinguishing capability is improved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a bipolar high breaking miniature circuit breaker, includes casing and sets up electromagnetic tripping mechanism, arc extinguishing mechanism and the contact operating device in the casing, electromagnetic tripping mechanism, arc extinguishing mechanism and contact operating device install on the base of casing its characterized in that: the contact operating mechanism is linked with the electromagnetic tripping mechanism, and the arc extinguishing mechanism is arranged in a square cavity at the lower end of the base;

2. A bipolar high breaking miniature circuit breaker according to claim 1, characterized in that: the buckle assembly comprises a connecting rod, a jump buckle and a lock catch, the handle is connected with the jump buckle through the connecting rod, the jump buckle is rotatably arranged on the positioning shaft, the lower end of the jump buckle is connected with the lock catch, the lower end of the lock catch is connected with a first contact rack and a second contact rack, and the first contact rack and the second contact rack are respectively rotatably arranged on the positioning shaft and are positioned at two ends of the jump buckle.

3. A bipolar high breaking miniature circuit breaker according to claim 2, characterized in that: the inner side end of the lock catch is provided with a torsion buckle, and the torsion buckle is elastically connected with the spring and used for releasing the power of jumping of the lock catch.

4. A bipolar high breaking miniature circuit breaker according to claim 1, characterized in that: electromagnetic tripping device includes yoke and coil and the iron core subassembly of setting on the yoke, and the coil winding cup joints on the yoke, iron core subassembly includes the iron core sleeve pipe and sets up moving iron core, quiet iron core and ejector pin in the iron core sleeve pipe, ejector pin one end with move the iron core and be connected, the other end stretches out after passing quiet iron core.

5. A bipolar high breaking miniature circuit breaker according to claim 1, characterized in that: arc extinguishing mechanism is including setting up explosion chamber in the base, setting up the striking piece at the explosion chamber lower extreme, it is equipped with the square cavity of placing to correspond the explosion chamber in the base, and one side distribution of explosion chamber has a plurality of bars pieces, and the interval forms the grid groove between the bar piece, and one side that square cavity corresponds the grid groove is equipped with the electric arc eduction port.

6. A bipolar high breaking miniature circuit breaker according to claim 5, characterized in that: the middle of the square cavity is provided with a middle clapboard which divides the square cavity into two parts.

7. A bipolar high breaking miniature circuit breaker according to claim 6, characterized in that: and extended arc-leading tails are arranged at the lower ends of the first static contact and the second static contact, which are close to one side of the arc extinguish chamber.