CN114141585A

CN114141585A - Circuit breaker

Info

Publication number: CN114141585A
Application number: CN202111667369.4A
Authority: CN
Inventors: 张彦阳; 盛勇兵; 任昌宾; 徐�明; 金贵
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-03-04

Abstract

The invention discloses a circuit breaker. The circuit breaker includes: the device comprises a clapboard shell, a transmission mechanism, an operating mechanism, a thermal tripping mechanism, a magnetic tripping mechanism, an arc extinguishing mechanism and a wiring mechanism. The operating mechanism, the magnetic tripping mechanism and the transmission assembly are arranged on the same side, the thermal tripping mechanism and the arc extinguishing mechanism are arranged side by side with the operating mechanism, the first partition plate and the second partition plate are arranged in a layered mode along the vertical direction of the bottom plate surface of the shell body, the first conductive bar is placed in a first electrical isolation cavity formed by the first partition plate and the second partition plate in a surrounding mode, the second conductive bar is placed between the second partition plate and the bottom plate surface of the shell body, and the driving piece, the magnetic tripping mechanism and the arc extinguishing mechanism are installed on the first partition plate. Through the circuit breaker that adopts this structure, simplified the overall arrangement between the circuit breaker internal mechanism for connect in order between the mechanism, can also improve the inside space utilization of circuit breaker simultaneously, make the circuit breaker volume can reduce, cause the circuit breaker more to have the practicality.

Description

Circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker.

Background

The circuit breaker is important switch equipment in a power mechanism, and when an electric appliance works normally, the circuit breaker can realize the functions of power failure, power supply, circuit conversion and the like by closing or opening a circuit for supplying electric energy; when the electrical appliance is in overload, short circuit and other abnormalities, the circuit breaker can cut off an electrical circuit through tripping, and the safety of working personnel and the normal operation of equipment due to circuit faults are avoided.

The circuit breaker has the installation mode of plug-in type, fixed type and closing drawer type, wherein, the safety of equipment use industry can be effectively improved through the use of the plug-in type circuit breaker. The circuit breaker is internally provided with a first control circuit board and a second control circuit board which are stacked, and a detection assembly and a transmission mechanism are placed on the first control circuit board and the second control circuit board.

The current plug-in circuit breaker still is provided with first baffle and second baffle simultaneously, and install operating device on first baffle and the second baffle, overload protection mechanism, functional mechanism such as short-circuit protection mechanism and explosion chamber, set up first control scheme board simultaneously, the second control scheme board, first baffle and second baffle make the inside structure of circuit breaker very complicated, and space utilization is not high, cause the size of circuit breaker great, and then cause when installing the circuit breaker, the mounting dimension that needs is big, can't satisfy the requirement of high density distribution.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is that in the prior art, the first control circuit board, the second control circuit board and the partition board in the wiring mechanism are unreasonable in layout, so that the circuit breaker cannot meet the requirement of high-density power distribution.

To this end, the present invention provides a circuit breaker comprising:

the partition plate shell comprises a shell body, a first partition plate and a second partition plate, wherein the first partition plate and the second partition plate are stacked in the vertical direction of the bottom plate surface of the shell body; the first partition plate and the second partition plate are fixedly connected with the shell body;

the transmission mechanism comprises a transmission assembly and a driving piece which are arranged side by side, the driving piece is fixedly arranged on the first partition plate, the driving piece is connected with a first transmission piece of the transmission assembly, and the transmission assembly is connected with the shell body;

the operating mechanism is arranged on the shell body, and the operating mechanism and the transmission assembly are arranged on the same side; the operating mechanism is connected with a second transmission piece of the transmission assembly, the second transmission piece is in transmission connection with the first transmission piece, and the operating mechanism is suitable for driving the breaker to be switched on and off under the driving of the driving piece;

the thermal tripping mechanism is arranged on the shell body, arranged side by side with the operating mechanism and arranged on the same side as the driving piece;

the magnetic tripping mechanism is arranged on the first partition plate, arranged on the same side as the operating mechanism and arranged on one side of the operating mechanism, which is far away from the transmission assembly;

the arc extinguishing mechanism is arranged on the first partition plate, the arc extinguishing mechanism and the thermal tripping mechanism are arranged on the same side, and the arc extinguishing mechanism and the magnetic tripping mechanism are arranged side by side;

the wiring mechanism is suitable for being connected with an external electric appliance and comprises a first conductive bar and a second conductive bar; the first conductive bar is arranged in an electric isolation cavity enclosed by the first partition board and the second partition board; the second conductive bar is arranged between the second partition plate and the bottom plate surface of the shell body.

Alternatively, the circuit breaker described above,

the operating mechanism includes:

the rotating piece is in meshing transmission with the second transmission piece;

a transmission frame rotatably mounted on the housing body,

the jump buckle piece is rotatably arranged on the transmission frame and is connected with the rotating piece through a first connecting rod;

the locking fastener is rotatably arranged on the transmission frame and is matched and linked with the jump fastener;

the moving contact is rotatably arranged on the transmission frame through a first mounting shaft;

the static contact is fixedly connected with the first partition plate;

the biasing member is sleeved on the first mounting shaft of the transmission frame, one end of the biasing member is fixedly connected with the transmission frame, and the other end of the biasing member is connected with the moving contact.

Alternatively, the circuit breaker described above,

the arc extinguishing mechanism includes:

the arc extinguishing chamber is placed in the second mounting portion of the first partition plate, the arc striking plate is connected with the arc extinguishing chamber, the arc striking plate is further connected with the fixed contact, and the arc striking plate is suitable for guiding electric arcs between the moving contact and the fixed contact to the arc extinguishing chamber.

Alternatively, the circuit breaker described above,

the first conductive bar has an extension;

the thermal trip mechanism includes:

a heat transfer member having a first connection portion adapted to be connected with the extension portion;

the thermal deformation piece comprises a second connecting part and a deformation part, the second connecting part is connected with the first connecting part, the deformation part is in a separation state at an interval with the lock catch piece, and the first conductive bar is in a thermal deformation state which is bent towards the direction close to the lock catch piece to be in contact with the lock catch piece when being heated.

Alternatively, the circuit breaker described above,

the first connecting part is of a U-shaped structure,

the first connecting part is provided with a first connecting body, a second connecting body and a third connecting body which are connected, the first connecting body is suitable for being connected with the first conducting bar, and the third connecting body is fixedly connected with the adjusting piece.

Alternatively, the circuit breaker described above,

the first partition plate is also provided with a third mounting part;

magnetism tripping device drives the hasp piece and moves towards being close to or keeping away from thermal deformation piece direction, magnetism tripping device includes:

a mounting bracket placed in the third mounting portion, the mounting bracket having a limiting groove;

the static iron core is placed on the limiting groove towards one side close to the first mounting part;

the movable iron core is connected with the static iron core through a spring and is coaxial with the static iron core;

the ejector rod penetrates through the static iron core and the movable iron core and is limited by the movable iron core;

the sleeve is sleeved on the outer surfaces of the static iron core and the movable iron core;

and the coil is sleeved on the outer surface of the sleeve.

Alternatively, the circuit breaker described above,

the wiring mechanism further comprises a wiring box which is fixedly connected with the shell body, and the first conductive bar and the second conductive bar are connected with the external electrical appliance through the wiring box; the junction box and the driving piece are arranged on the same side, and the junction box is arranged on the other side of the driving piece relative to the thermal tripping mechanism.

Alternatively, the circuit breaker described above,

the wiring mechanism further comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are fixedly arranged in the shell body, and the first connecting piece is electrically connected with the second conductive bar; the second connector is electrically connected to the coil.

Alternatively, the circuit breaker described above,

the drawing handle is slidably arranged on the shell body and is connected with the rotating piece through a second connecting rod;

still include the buckle, the buckle includes:

a first mounting structure adapted to be mounted on the housing body;

the limiting structure is connected with the first mounting structure;

the fool-proof structure is connected with the first mounting structure and is telescopically arranged on the fool-proof hole on the shell body;

the fool-proof structure is in a fool-proof limit state of retracting in the fool-proof hole under the limit of external force; and under the fool-proof limiting state, the limiting structure limits and blocks the pull-out handle to be switched on.

Alternatively, the circuit breaker described above,

the first partition plate has a first mounting portion; the driving piece is arranged in the mounting part.

The technical scheme provided by the invention has the following advantages:

the invention provides a circuit breaker, comprising: the device comprises a clapboard shell, a transmission mechanism, an operating mechanism, a thermal tripping mechanism, a magnetic tripping mechanism, an arc extinguishing mechanism and a wiring mechanism. The partition plate shell comprises a shell body, a first partition plate and a second partition plate, wherein the first partition plate and the second partition plate are stacked in the vertical direction of the bottom plate surface of the shell body; the first partition plate and the second partition plate are fixedly connected with the shell body; the transmission mechanism comprises a transmission assembly and a driving piece which are arranged side by side, the driving piece is fixedly arranged on the first partition plate, the driving piece is connected with a first transmission piece of the transmission assembly, and the transmission assembly is connected with the shell body; the operating mechanism is arranged on the shell body, and the operating mechanism and the transmission assembly are arranged on the same side; the operating mechanism is connected with a second transmission piece of the transmission assembly, the second transmission piece is in transmission connection with the first transmission piece, and the operating mechanism is suitable for driving the breaker to be switched on and off under the driving of the driving piece; the thermal tripping mechanism is arranged on the shell body, is arranged side by side with the operating mechanism and is arranged at the same side with the driving piece; the magnetic tripping mechanism is arranged on the first partition plate, the magnetic tripping mechanism and the operating mechanism are arranged on the same side, and the magnetic tripping mechanism is arranged on one side of the operating mechanism, which is far away from the transmission assembly; the arc extinguishing mechanism is arranged on the first partition plate, the arc extinguishing mechanism and the thermal tripping mechanism are arranged on the same side, and the arc extinguishing mechanism and the magnetic tripping mechanism are arranged side by side; the wiring mechanism is suitable for being connected with an external electric appliance and comprises a first conductive bar and a second conductive bar; the first conductive bar is arranged in an electric isolation cavity enclosed by the first partition board and the second partition board; the second conductive bar is arranged between the second partition plate and the bottom plate surface of the shell body.

The circuit breaker of this structure, through with operating device, magnetism tripping device and drive assembly homonymy setting, all set up heat tripping device and arc extinguishing mechanism side by side with operating device, set up the vertical direction layering of the bottom plate face of casing body with first baffle and second baffle, place first electrically conductive row and enclose synthetic first electrical isolation intracavity at first baffle and second baffle, place the electrically conductive row of second between the bottom plate face of second baffle and casing body, install driving piece, magnetism tripping device and arc extinguishing mechanism on first baffle. Through adopting the circuit breaker of this structure, under the condition of maintaining each function of current circuit breaker, through with first baffle, first electrically conductive row, the second baffle, the electrically conductive bottom plate face layering setting of arranging and casing body of second, the overall arrangement between the inside mechanism of circuit breaker has been simplified, can also improve the inside space utilization of circuit breaker simultaneously, reduce the size of circuit breaker along the extending direction of casing body bottom plate face, make the circuit breaker volume reduce, satisfy more service environment, cause the circuit breaker to satisfy the demand of high density distribution.

2. The invention provides a circuit breaker, wherein the first conducting bar is provided with an extension part; the thermal trip mechanism includes: a heat transfer element and a thermal profile. The heat transfer member has a first connection portion adapted to connect with the first conductive bar; thermal deformation piece includes second connecting portion and deformation portion, the second connecting portion with first connecting portion are connected, deformation portion have with the separation state that hasp piece interval set up, and when first electrically conductive row is heated the orientation is close to the buckle piece direction is crooked with the thermal deformation state of hasp piece contact.

The circuit breaker of this structure is through connecting the heat transfer piece in first leading electrical drainage, is connected the second connecting portion of thermal deformation piece with the heat transfer piece simultaneously, and when the circuit at wiring board place was in overload, the deformation portion of thermal deformation piece can be heated and take place the bending towards the direction of hasp, and after fastening with the lock, with the circuit disconnection, other components and parts implementation protection inside the circuit breaker, the maintenance personal of being convenient for operates during follow-up maintenance. When the circuit is in overload, the deformation direction of the thermal deformation piece is specified to be vertical and far away from the direction of the arc extinguishing system, the space of the arc extinguishing system occupied by the thermal tripping mechanism is reduced, the arc extinguishing effect of the arc extinguishing system is not influenced by the thermal tripping mechanism, and then electric arcs generated in the interior when the circuit breaker is switched to a state do not influence other electric appliances, so that the circuit breaker has practicability.

3. The circuit breaker provided by the invention further comprises a drawing handle and a buckle. The drawing handle is slidably arranged on the shell body and connected with the rotating piece through a second connecting rod; the buckle includes: the device comprises a first mounting structure, a limiting structure and a fool-proof structure, wherein the first mounting structure is suitable for being mounted on a shell body; the limiting structure is connected with the first mounting structure; the fool-proof structure is connected with the first mounting structure and is telescopically arranged on a fool-proof hole on the shell body; the fool-proof structure is in a fool-proof limit state retracting in the fool-proof hole under the limit of external force; and under the fool-proof limiting state, the limiting structure limits and blocks the pull-out handle to be switched on.

The circuit breaker of this structure through installing first mounting structure on the casing, limit structure with prevent slow-witted structure and be connected with first mounting structure, when the circuit breaker is in the state of not installing in place, the buckle is by the rack extrusion, get back to inside the casing through preventing slow-witted hole for limit structure butt carries on spacingly in one side of handle to the handle. Through the circuit breaker that adopts this structure, will draw the handle and carry on spacingly, can effectively avoid drawing the handle and be the motion of hot plug, reach the purpose of preventing slow-witted to the circuit breaker, the simple structure of buckle simultaneously, occupation space is little, can reduce the size of circuit breaker, causes the circuit breaker more to have the practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a circuit breaker provided in the present invention;

fig. 2 is a schematic structural view of a diaphragm casing in the circuit breaker provided in the present invention;

fig. 3 is a schematic structural view of a first barrier and a second barrier in the circuit breaker provided in the present invention;

fig. 4 is a schematic view of the position of a transmission mechanism in the circuit breaker provided in the present invention;

fig. 5 is a schematic view of the position of an operating mechanism in the circuit breaker provided in the present invention;

fig. 6 is a schematic structural view of an operating mechanism in the circuit breaker provided in the present invention;

fig. 7 is a schematic position diagram of a thermal trip mechanism in a circuit breaker provided in the present invention;

fig. 8 is a schematic structural view of a thermal trip mechanism in embodiment 1 of the circuit breaker provided in the present invention;

fig. 9 is a schematic structural view of a thermal trip mechanism in embodiment 2 of the circuit breaker provided in the present invention;

fig. 10 is an exploded view of a magnetic trip mechanism in the circuit breaker provided in the present invention;

fig. 11 is a schematic structural view of an arc extinguishing mechanism in the circuit breaker provided in the present invention;

fig. 12 is a schematic structural view of a pull handle fitting buckle in the circuit breaker provided in the present invention;

fig. 13 is a schematic structural view of the abutment of the indicator in the circuit breaker provided in the present invention.

1-a diaphragm casing; 11-a housing body; 111-a housing stop; 1111 — first position; 1112-a second position; 12-a first separator; 121-a first mounting portion; 122-a second mounting portion; 123-a third mounting section; 13-a second separator;

2-a transmission mechanism; 21-a transmission assembly; 211-a first transmission member; 212-a second transmission; 213-a first gear; 214-a second gear; 215-third gear; 22-a drive member;

3-an operating mechanism; 31-a rotating member; 32-a transmission frame; 33-jump fasteners; 34-a catch member; 35-a movable contact; 36-a stationary contact; 37-a biasing member; 38-a first link; 39-a second link;

4-thermal trip mechanism; 41-a heat transfer member; 411 — first connection; 4111-a first connector; 4112-a second linker; 4113-a third linker; 412-an adjustment section; 42-a heat deformable member; 421-a second connection portion; 422-a deformation part; 43-an adjustment member;

5-a magnetic trip mechanism; 51-a mounting bracket; 52-stationary core; 53-a movable iron core; 54-a mandril; 55-a cannula; 56-a coil;

6-arc extinguishing mechanism; 61-an arc extinguishing chamber; 62-arc striking sheet;

7-a wiring mechanism; 71-a first conductive bar; 72-a second conductive bar; 73-junction box; 74-a first connector; 75-a second connector;

81-pulling handle; 811-a first snap-in part; 812-a second card portion; 813-viewing hole; 82-buckling; 821-a first mounting structure; 822-a limiting structure; 823-fool-proofing structure; 824-an unlocking configuration; 83-an indicator; 831 — a second mounting structure; 832-swing structure; 833-indicate structure; 834-connecting rod; 835-biasing arrangement.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict between them.

Example 1

The present embodiment provides a circuit breaker, as shown in fig. 1 to 13, including: the device comprises a clapboard shell 1, a transmission mechanism 2, an operating mechanism 3, a thermal tripping mechanism 4, a magnetic tripping mechanism 5, an arc extinguishing mechanism 6 and a wiring mechanism 7. The partition board shell 1 comprises a shell body 11, a first partition board 12 and a second partition board 13, wherein the first partition board 12 and the second partition board 13 are arranged in a stacking mode along the vertical direction of the bottom board surface of the shell body 11; the first partition plate 12 and the second partition plate 13 are fixedly connected with the shell body 11; the transmission mechanism 2 comprises a transmission assembly 21 and a driving part 22 which are arranged side by side, the driving part 22 is fixedly arranged on the first partition plate 12, the driving part 22 is connected with a first transmission part 211 of the transmission assembly 21, and the transmission assembly 21 is connected with the shell body 11; the operating mechanism 3 is arranged on the shell body 11, and the operating mechanism 3 and the transmission assembly 21 are arranged on the same side; the operating mechanism 3 is connected with the second transmission piece 212 of the transmission assembly 21, the second transmission piece 212 is in transmission connection with the first transmission piece 211, and the operating mechanism 3 is suitable for driving the breaker to be switched on and off under the driving of the driving piece 22; the thermal tripping mechanism 4 is arranged on the shell body 11, is arranged side by side with the operating mechanism 3 and is arranged at the same side with the driving piece 22; the magnetic tripping mechanism 5 is arranged on the first partition plate 12, the magnetic tripping mechanism 5 is arranged on the same side as the operating mechanism 3, and the magnetic tripping mechanism 5 is arranged on one side of the operating mechanism 3, which is far away from the transmission assembly 21; the arc extinguishing mechanism 6 is arranged on the first partition plate 12, the arc extinguishing mechanism 6 and the thermal tripping mechanism 4 are arranged on the same side, and the arc extinguishing mechanism 6 and the magnetic tripping mechanism 5 are arranged side by side; the wiring mechanism 7 is adapted to be connected to an external electrical appliance, the wiring mechanism 7 comprising a first conductor bar 71 and a second conductor bar 72; the first conductive bar 71 is arranged in a first electric isolation cavity enclosed by the first partition board 12 and the second partition board 13; the second conductive bar 72 is disposed between the second partition 13 and the bottom plate surface of the case body 11. For example, in the present embodiment, the first partition plate 12 has a first mounting portion 121; the driver 22 is disposed within a mounting portion.

As shown in fig. 4 to 6, in the circuit breaker provided in the present embodiment, the transmission assembly 21 includes: first transmission member 211, second transmission member 212, first gear 213, second gear 214, and third gear 215. The first transmission member 211 is engaged with the first gear 213, the fourth gear is coaxially disposed with the first gear 213, the fourth gear is stacked with the first gear 213, the fourth gear is mounted on one side of the first gear 213 facing to the bottom plate surface close to the housing body 11, the second gear 214 is engaged with the fourth gear, the third gear 215 is coaxially disposed with the second gear, the third gear 215 is stacked with the second gear 214, the third gear 215 is mounted on one side of the second gear 214 facing to the bottom plate surface far from the housing body 11, and the second transmission member 212 is engaged with the third gear 215. For example, in the present embodiment, the second transmission member 212 is also engaged with the rotation member 31.

As shown in fig. 1, 5 and 6, in the circuit breaker provided in the present embodiment, the operating mechanism 3 includes: the device comprises a rotating piece 31, a transmission piece 32, a tripping piece 33, a locking piece 34, a movable contact 35, a fixed contact 36 and a biasing piece 37. Wherein, the rotating member 31 is engaged with the second transmission member 212 for transmission; the transmission frame 32 is rotatably installed on the housing body 11, the jump buckle 33 is rotatably installed on the transmission frame 32, and the jump buckle 33 is connected with the rotating member 31 through the first connecting rod 38; the locking piece 34 is rotatably arranged on the transmission frame 32 and is matched and linked with the jump buckle piece 33; the movable contact 35 is rotatably mounted on the transmission frame 32 through a first mounting shaft; the fixed contact 36 is fixedly connected with the first partition plate 12; the biasing member 37 is disposed on the first mounting shaft of the transmission frame 32, one end of the biasing member 37 is fixedly connected to the transmission frame 32, and the other end of the biasing member 37 is connected to the movable contact 35.

As shown in fig. 3, 5 and 11, in the circuit breaker provided in the present embodiment, the first partition 12 further includes a second mounting portion 122, and the arc extinguishing mechanism 6 includes: the arc extinguishing chamber 61 and the arc striking piece 62, the arc extinguishing chamber 61 is placed in the second mounting portion 122 of the first partition plate 12, the arc striking piece 62 is connected with the arc extinguishing chamber 61, the arc striking piece 62 is also connected with the fixed contact 36, and the arc striking piece 62 is suitable for guiding the electric arc between the movable contact 35 and the fixed contact 36 to the arc extinguishing chamber 61.

As shown in fig. 7 and 9, the present embodiment provides the circuit breaker, wherein the first conductive bar 71 has an extension; the thermal trip mechanism 4 includes: a heat transfer member 41 and a thermal deformation member 42. Wherein, the heat transfer member 41 has a first connection portion 411, the first connection portion 411 is adapted to be connected with the extension portion; the thermal deformation member 42 includes a second connection portion 421 and a deformation portion 422, the second connection portion 421 is connected to the first connection portion 41, the deformation portion 422 has a separated state spaced from the locking member 34, and a thermal deformation state when the first conductive bar 71 is heated, the thermal deformation state is bent toward a direction close to the locking member 34 to contact with the locking member 34. For example, when the circuit breaker internal circuit is in a normal operation state, i.e., the deformed portion 422 is not in contact with the latch member 34, there is a gap so that the deformed portion 422 and the latch member 34 are in a separated state; when the circuit breaker internal circuit is in overload, namely, the deformation part 422 bends towards the direction of the locking piece 34 until contacting with the locking piece 34, so that the deformation part 422 and the locking piece 34 are in a thermal deformation shape state, at the moment, the circuit is broken, and the circuit can be effectively protected. In the present embodiment, the adjusting member 43 abuts on the heat transfer member 41, and the external force can drive the adjusting member 43 to move toward or away from the locking member 34.

As shown in fig. 8 and fig. 9, in the circuit breaker provided in this embodiment, the first connection portion 411 is a U-shaped structure, the first connection portion 41 has a first connection body 4111, a second connection body 4112, and a third connection body 4113 connected to each other, the first connection body 4111 is adapted to be connected to the first conductive bar 71, and the third connection body 4113 is fixedly connected to the adjusting member 43. The opening direction of the U-shaped structure provided in this embodiment is set perpendicular to the extending direction of the heat deformable member 2.

As shown in fig. 7 to 9, in the circuit breaker provided in the present embodiment, the thermal trip mechanism 4 further includes an adjusting member 43, and the adjusting member 43 is adapted to be mounted on the housing body 11; the heat transfer member 41 further includes an adjustment portion 412 connected to the first connection portion 411, the adjustment portion 412 abutting against the adjustment member 43; the adjusting member 43 drives the adjusting portion 412 under the action of external force to move the thermal deformation member 42 toward or away from the locking member 34.

As shown in fig. 1, 3, 6 and 10, in the circuit breaker of the present embodiment, the first partition 12 is further provided with a third mounting portion 123; the magnetic trip mechanism 5 drives the locking member 34 to move toward or away from the thermal deformation member 42, and the magnetic trip mechanism 5 includes: the device comprises a mounting bracket 51, a static iron core 52, a moving iron core 53, a mandril 54, a sleeve 55 and a coil 56. Wherein, the mounting bracket 51 is placed in the third mounting part 123, and the mounting bracket 51 has a limit groove; the static iron core 52 is placed on the limiting groove towards one side close to the first mounting part 121; the movable iron core 53 is connected with the static iron core 52 through a spring and is coaxial with the static iron core 52; the mandril 54 penetrates through the static iron core 52 and the movable iron core 53 and is limited by the movable iron core 53; the sleeve 55 is sleeved on the outer surfaces of the static iron core 52 and the movable iron core 53; the coil 56 is fitted over the outer surface of the sleeve 55.

As shown in fig. 1 and fig. 6, in the circuit breaker provided in this embodiment, the wiring mechanism 7 further includes a junction box 73, which is fixedly connected to the housing body 11, and the first conductive bar 71 and the second conductive bar 72 are connected to an external electrical appliance through the junction box 73; the junction box 73 is disposed on the same side as the driving member 22 and on the other side of the driving member 22 with respect to the thermal trip mechanism 4.

As shown in fig. 1, in the circuit breaker provided by the present embodiment, the wiring mechanism 7 further includes a first connecting member 74 and a second connecting member 75, the first connecting member 74 and the second connecting member 75 are fixedly disposed in the housing body 11, and the first connecting member 74 is electrically connected to the second conductive bar 72; the second connector 75 is electrically connected to the coil 56.

As shown in fig. 1 and 12, the circuit breaker provided in this embodiment further includes a pulling handle 81 slidably disposed on the housing body 11, wherein the pulling handle 81 is connected to the rotating member 31 through the second link 39; still include buckle 82, buckle 82 includes: first mounting structure 821, limit structure 822 and fool-proof structure 823. Wherein the first mounting structure 821 is adapted to be mounted on the housing body 11; the limiting structure 822 is connected with the first mounting structure 821; the fool-proof structure 823 is connected with the first mounting structure 821 and is telescopically arranged on the fool-proof hole on the housing body 11; the fool-proof structure 823 has a fool-proof limit state of retracting in the fool-proof hole under the limit of external force; and in the foolproof limiting state, the limiting structure 822 limits and blocks the pull-out handle 81 to be switched on. The buckle 82 provided by the present embodiment further includes: the unlocking structure 824, the unlocking structure 824 is connected with the first mounting structure 821, is suitable for abutting with the second clamping part 812 of the drawing handle 81, and the unlocking structure 824 has an unlocking state which drives the fool-proof structure 823 to rotate and retract into the fool-proof hole under the driving of the second clamping part 812. For example, in this embodiment, the unlocking structure 824 is a limiting protrusion, the second clamping portion 812 is an inclined surface, and when the circuit breaker is in the unlocking state, the unlocking structure 824 abuts against the second clamping portion 812. Of course, in other alternative embodiments, the unlocking structure 824 and the second clamping portion 812 are both inclined surfaces.

The using state of the circuit breaker comprises a switching-off state, an unlocking state, a switching-on state and a state which is not installed in place, wherein in the switching-off state, the unlocking structure 824 is clamped on the clamping portion 811 of the pulling handle 81 and moves by the limiting handle, specifically, the foolproof structure 823 is clamped in the foolproof hole to prevent the pulling handle 81 from being accidentally switched on; in the unlocking state, the unlocking structure 824 abuts against the second clamping portion 812 of the pulling handle 81, and at this time, if the circuit breaker needs to be taken out from the cabinet, the pulling handle 81 is continuously pulled, so that the buckle 82 rotates along the first mounting structure 821 until the fool-proof structure 823 extends into the housing body 11, and unlocking of the circuit breaker is completed; under the combined floodgate state, the clearance is reserved in spacing structure 822 and formation between the pull handle 81, prevents this moment that the circuit breaker from closing earlier and will prevent that slow-witted structure 823 joint is in the rack again. Of course, in other alternative embodiments, after the circuit breaker is installed in place, all structures of the buckle 82 give way, so that the pulling handle 81 can be normally opened and closed; under the slow-witted spacing state of preventing, limit structure 822 butt is on first joint portion 811, and prevent slow-witted structure 823 and stretch into in housing body 11 for draw handle 81 can't close a floodgate, and the circuit breaker is ready to be installed in the rack this moment, but is in the state of not installing in place.

As shown in fig. 1 and 13, the circuit breaker provided in this embodiment further includes an indicator 83. The indicator 83 comprises a second mounting structure 821, a swinging structure 822 and an indicating structure 823, wherein the second mounting structure 821 is adapted to be rotatably mounted on the pulling handle 81; the swinging structure 832 is fixedly connected with the second mounting structure 821, and the swinging structure 832 is suitable for sliding relative to the limiting part of the partition board shell 1; the indicating structure 833 is fixedly connected with the swinging structure 832; when the external force of the pulling handle 81 drives the pulling handle 81 to switch on and off along the first direction, the swinging structure 832 drives the indication structure 833 to swing under the driving of the limiting part so as to indicate that the pulling handle 81 is in a switch-off state or a switch-on state.

As shown in fig. 13, in the circuit breaker according to the present embodiment, the indicator 83 further includes a connecting rod 834, and the connecting rod 834 is connected between the indicating structure 833 and the second mounting structure 821 to connect the indicating structure 833 and the second mounting structure 833 into a whole. The first direction provided by this embodiment specifically is: and the movement direction of the pulling handle 81 when opening and closing the brake. The indicator 83 provided in this embodiment further includes: the biasing structure 835 has one end abutting against the pulling handle 81 and the other end fixedly connected to the swinging structure 832, and the biasing structure 835 has a biasing force for driving the swinging structure 832 to abut against the limiting portion. In this embodiment, the biasing structure 835 is wavy and elastic, and in other alternative embodiments, the biasing structure 835 may be a linear spring.

As shown in fig. 1, 12 and 13, in the circuit breaker provided in the present embodiment, the pulling handle 81 further has a viewing hole 813; the indication structure 833 includes a first indication portion and a second indication portion. When in a closing state, the abutting convex block abuts against the first position 1111 of the inclined surface of the shell limiting part 111, and the observation hole 813 is opposite to the first indicating part; in the opening state, the abutment projection abuts on the second position 1112 of the inclined surface, and the observation hole 813 faces the second indicator. In this embodiment, the pulling handle 81 further includes a first limiting wall surface and a second limiting wall surface, and the second indicating portion abuts against the second limiting wall surface in a closing state; when the brake is in the opening state, the first indicating part is abutted against the first limiting wall surface.

Through the circuit breaker of above-mentioned structure, with operating device, magnetism tripping device and drive assembly homonymy are set up, all set up heat tripping device and arc extinguishing mechanism side by side with operating device, set up the vertical direction layering of the bottom plate face of casing body with first baffle and second baffle, place first electrically conductive row and enclose synthetic first electrical isolation intracavity at first baffle and second baffle, place the electrically conductive row of second between the bottom plate face of second baffle and casing body, install driving piece, magnetism tripping device and arc extinguishing mechanism on first baffle. Under the condition of maintaining each function of current circuit breaker, through with first baffle, first electrically conductive row, the second baffle, the electrically conductive row of second and housing body's bottom plate face layering sets up, the overall arrangement between the internal mechanism of circuit breaker has been simplified, can also improve the inside space utilization of circuit breaker simultaneously, with the size reduction of circuit breaker along the extending direction of housing body bottom plate face, make the circuit breaker volume can reduce, satisfy more service environment, cause the circuit breaker to satisfy the demand of high-density distribution.

Example 2

The present embodiment provides a circuit breaker, as shown in fig. 9, which is different from the circuit breaker provided in embodiment 1 in that the barrier housing 1 includes only the housing body 11 and the first barrier 12. For example, the first partition 12 provided in this embodiment is disposed along a vertical direction of the bottom surface of the housing body, and the housing body 11 is provided with the plugging portion into which the second conductive bar 72 of the wiring mechanism 7 is plugged, the plugging portion is disposed perpendicular to the bottom surface of the housing body 11, and the plugging portion can separate the first conductive bar 71 and the second conductive bar 72. In the present embodiment, the opening direction of the U-shaped structure is set toward the extending direction of the thermally deformable portion 22.

It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are not intended to be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A circuit breaker, comprising:

the baffle shell (1) comprises a shell body (11), a first baffle (12) and a second baffle (13), wherein the first baffle (12) and the second baffle (13) are stacked along the vertical direction of the bottom plate surface of the shell body (11); the first partition plate (12) and the second partition plate (13) are fixedly connected with the shell body (11);

the transmission mechanism (2) comprises a transmission assembly (21) and a driving piece (22) which are arranged side by side, the driving piece (22) is fixedly installed on the first partition plate (12), the driving piece (22) is connected with a first transmission piece (211) of the transmission assembly (21), and the transmission assembly (21) is connected with the shell body (11);

the operating mechanism (3) is installed on the shell body (11), and the operating mechanism (3) and the transmission assembly (21) are arranged on the same side; the operating mechanism (3) is connected with a second transmission piece (212) of the transmission assembly (21), the second transmission piece (212) is in transmission connection with the first transmission piece (211), and the operating mechanism (3) is suitable for driving the circuit breaker to be switched on and off under the driving of the driving piece (22);

the thermal tripping mechanism (4) is arranged on the shell body (11), arranged side by side with the operating mechanism (3) and arranged on the same side as the driving piece (22);

the magnetic tripping mechanism (5) is installed on the first partition plate (12), the magnetic tripping mechanism (5) and the operating mechanism (3) are arranged on the same side, and the magnetic tripping mechanism (5) is arranged on one side, far away from the transmission assembly (21), of the operating mechanism (3);

the arc extinguishing mechanism (6) is installed on the first partition plate (12), the arc extinguishing mechanism (6) and the thermal tripping mechanism (4) are arranged on the same side, and the arc extinguishing mechanism (6) and the magnetic tripping mechanism (5) are arranged side by side;

wherein, the wire connection mechanism (7) is suitable for being connected with an external electric appliance, and the wire connection mechanism (7) comprises a first conductive bar (71) and a second conductive bar (72); the first conductive bar (71) is arranged in an electric isolation cavity enclosed by the first partition board (12) and the second partition board (13); the second conductive bar (72) is disposed between the second partition (13) and a bottom plate surface of the case body (11).

2. The circuit breaker of claim 1,

the operating mechanism (3) comprises:

the rotating piece (31) is in meshed transmission with the second transmission piece (212);

a transmission frame (32) rotatably mounted on the housing body (11),

the jump fastener (33) is rotatably arranged on the transmission frame (32), and the jump fastener (33) is connected with the rotating piece (31) through a first connecting rod (38);

the locking piece (34) is rotatably arranged on the transmission frame (32) and is matched and linked with the jump buckle piece (33);

the moving contact (35) is rotatably arranged on the transmission frame (32) through a first mounting shaft;

the static contact (36) is fixedly connected with the first partition plate (12);

the biasing member (37) is sleeved on the first mounting shaft of the transmission frame (32), one end of the biasing member (37) is fixedly connected with the transmission frame (32), and the other end of the biasing member (37) is connected with the movable contact (35).

3. The circuit breaker of claim 1,

the arc extinguishing mechanism (6) comprises:

explosion chamber (61) and striking piece (62), explosion chamber (61) are placed in second installation department (122) of first baffle (12), striking piece (62) are connected with explosion chamber (61), striking piece (62) still are connected with static contact (36), striking piece (62) are suitable for leading the electric arc between moving contact (35) and static contact (36) to explosion chamber (61).

4. The circuit breaker of claim 1,

the first conductive bar (71) has an extension;

the thermal trip mechanism (4) comprises:

a heat transfer member (41) having a first connection portion (411), the first connection portion (411) adapted to connect with an extension portion;

the thermal deformation piece (42) comprises a second connecting portion (421) and a deformation portion (422), the second connecting portion (421) is connected with the first connecting portion (41), the deformation portion (422) has a separation state arranged at intervals with the locking piece (34), and the first conductive bar (71) is bent towards the direction close to the locking piece (34) to be in a thermal deformation state contacting with the locking piece (34) when being heated.

5. The circuit breaker of claim 4,

the first connecting part (411) is of a U-shaped structure,

first connecting portion (411) have first connector (4111), second connector (4112) and third connector (4113) that are connected, first connector (4111) are suitable for being connected with first electrically conductive row (71), third connector (4113) and regulating part (43) fixed connection.

6. The circuit breaker of claim 5,

the first partition plate (12) is also provided with a third mounting part (123);

the magnetic tripping mechanism (5) drives the locking piece (34) to move towards the direction close to or far away from the thermal deformation piece (42), and the magnetic tripping mechanism (5) comprises:

a mounting bracket (51), the mounting bracket (51) being placed in the third mounting portion (123), the mounting bracket (51) having a limit groove;

the static iron core (52) faces to one side close to the first mounting part (121) and is placed on the limiting groove;

the movable iron core (53) is connected with the static iron core (52) through a spring and is coaxial with the static iron core (52);

the ejector rod (54) penetrates through the static iron core (52) and the movable iron core (53), and is limited by the movable iron core (53);

the sleeve (55), the said sleeve (55) is fitted over the outer surface of the static iron core (52) and moving iron core (53);

the coil (56), the coil (56) cover is established the surface of sleeve pipe (55).

7. The circuit breaker of claim 6,

the wiring mechanism (7) further comprises a junction box (73) fixedly connected with the shell body (11), and the first conductive bar (71) and the second conductive bar (72) are connected with the external electrical appliance through the junction box (73); the junction box (73) and the driving piece (22) are arranged on the same side, and the junction box is arranged on the other side of the driving piece (22) relative to the thermal tripping mechanism (4).

8. The circuit breaker of claim 7,

the wiring mechanism (7) further comprises a first connecting piece (74) and a second connecting piece (75), the first connecting piece (74) and the second connecting piece (75) are fixedly arranged in the shell body (11), and the first connecting piece (74) is electrically connected with the second conductive bar (72); the second connector (75) is electrically connected to the coil (56).

9. The circuit breaker of claim 1,

the drawing handle (81) is slidably arranged on the shell body (11), and the drawing handle (81) is connected with the rotating piece (31) through a second connecting rod (39);

further comprising a catch (82), the catch (82) comprising:

a first mounting structure (821) adapted to be mounted on the housing body (11);

a limiting structure (822) connected to the first mounting structure (821);

the fool-proof structure (823) is connected with the first mounting structure (821) and is telescopically arranged on the fool-proof hole in the shell body (11);

the fool-proof structure (823) has a fool-proof limit state of retracting in the fool-proof hole under the limit of external force; and under the fool-proof limiting state, the limiting structure (822) limits and blocks the pull-out handle (81) to be switched on.

10. The circuit breaker of claim 1,

the first partition plate (12) has a first mounting portion (121); the drive member (22) is disposed within the mounting portion.