CN216120143U

CN216120143U - Circuit breaker

Info

Publication number: CN216120143U
Application number: CN202121938087.9U
Authority: CN
Inventors: 王强; 郭德鑫; 叶子昕; 李磊鹏; 毛显饶
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-03-22
Anticipated expiration: 2031-08-18

Abstract

The utility model provides a circuit breaker, contact support and set up the moving contact on the contact support, the contact support can drive the moving contact and contact with the static contact and part, still includes switch module, the static contact top is equipped with the reflecting plate, is equipped with mobilizable ejector pin on the reflecting plate, the rotation that the contact supported can drive the ejector pin and remove, can trigger switch module state switching when the ejector pin removes, through set up mobilizable ejector pin on the reflecting plate, makes the contact support promote the ejector pin and remove when moving to through ejector pin drive switch module instruction circuit breaker's operating condition, effectively utilize the reflecting plate in the current circuit breaker, make the reflecting plate on the basis of protecting static contact and stifled gas, can also play the effect that is used for instructing circuit breaker operating condition.

Description

Circuit breaker

Technical Field

The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.

Background

Circuit breakers are commonly used to control the conduction and disconnection of electrical circuits and to automatically break the circuit in the event of a circuit fault. In order to determine the operating state of the circuit breaker, an indicating device may be mounted on the circuit breaker, and the operating state of the circuit breaker may be indicated by the indicating device. However, the existing indicating device has the defects of low utilization rate of parts in the circuit breaker, complex structure, high cost and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a circuit breaker with an indicating function.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the circuit breaker comprises a contact support and a moving contact arranged on the contact support, wherein the contact support can drive the moving contact to be in contact with and separate from a fixed contact, the circuit breaker further comprises a switch module, a reflecting plate is arranged above the fixed contact, a movable ejector rod is arranged on the reflecting plate, the rotating of the contact support can drive the ejector rod to move, and the state switching of the switch module can be triggered when the ejector rod moves.

Preferably, the switch further comprises a spring connected with the ejector rod, the contact supports that the ejector rod is pushed to compress the spring when the rotary driving circuit breaker is switched on, the spring is released when the rotary driving circuit breaker is switched off, and the ejector rod is driven by the spring to push the switch module.

Preferably, the ejector rod comprises a top plate and a bottom plate which are arranged oppositely, and a side plate connected between the top plate and the bottom plate, the side plate is slidably mounted on the reflecting plate, the contact support comprises a support part extending between the top plate and the bottom plate, and the bottom side of the support part can push the bottom plate to drive the ejector rod to compress the spring.

Preferably, the reflecting plate comprises a reflecting seat and two reflecting columns respectively arranged on the reflecting seat, a groove for avoiding the moving contact is formed between the two reflecting columns, the ejector rod is arranged on the reflecting columns in a sliding manner, and the spring is connected between the reflecting seat and the ejector rod.

Preferably, the reflection column is of a hollow structure, and the ejector rod is provided with a guide rail which is inserted into the inner side of the reflection column to slide.

Preferably, the inner side of the reflection column is provided with a hollow groove, the side wall of the hollow groove is provided with a guide groove, the guide rail comprises a first guide plate and a second guide plate, the second guide plate moves in the hollow groove, and the first guide plate slides in the guide groove.

Preferably, the side plate comprises an upper side plate and a lower side plate which are connected, the upper side plate and the lower side plate are respectively connected with the top plate and the bottom plate, the upper side plate is arranged on one side, close to the reflecting column, of the lower side plate, the lower side plate is perpendicular to the upper side plate, and the upper side plate is slidably mounted on the reflecting plate.

Preferably, a sleeve is arranged on the reflection seat, and one end, far away from the ejector rod, of the spring is inserted into the sleeve for limiting.

Preferably, the top of static contact is equipped with the explosion chamber, the reflecting plate includes preceding reflecting part and back reflecting part to and connect the lower reflecting part between preceding reflecting part and back reflecting part, lower reflecting part sets up between static contact top and explosion chamber, lower reflecting part middle part is equipped with dodges the hole, preceding reflecting part sets up in the explosion chamber and is close to one side that the contact supported, back reflecting part sets up in the explosion chamber and keeps away from one side that the contact supported.

Preferably, the switch module comprises a microswitch and a trigger button, the microswitch is connected with the indicating circuit, the trigger button is pressed when the ejector rod is close to the switch module, the trigger button is loosened when the ejector rod is far away from the switch module, the microswitch switching state can be respectively triggered by pressing the trigger button and loosening the trigger button, and the indicating circuit is driven to indicate when the microswitch switching state is switched.

According to the circuit breaker, the movable ejector rod is arranged on the reflecting plate, so that the contact support pushes the ejector rod to move while acting, the ejector rod drives the switch module to indicate the working state of the circuit breaker, the reflecting plate in the existing circuit breaker is effectively utilized, and the reflecting plate can play a role in indicating the working state of the circuit breaker on the basis of protecting a fixed contact and blocking air.

In addition, the ejector rod is connected with the spring, the contact support pushes the ejector rod to compress the spring when the breaker is switched on, the spring is released when the breaker is switched off, the ejector rod is driven by the spring to push the switch module, the support obstruction of the contact support during switching off can be reduced, the moving contact is prevented from being separated from the static contact, and the moving contact and the static contact can be accelerated to be separated under the action of the spring.

Drawings

Fig. 1 is a schematic view of the structure of the circuit breaker of the present invention;

FIG. 2 is a schematic structural view of the contact support of the present invention;

figure 3 is a cross-sectional view of the circuit breaker of the present invention;

FIG. 4 is the position of the contact support of the present invention at the time of closing;

FIG. 5 is the position of the contact support of the present invention during opening;

FIG. 6 is a schematic view of the combination of the reflection plate and the lift pin according to the present invention;

FIG. 7 is an exploded view of the drawing of the present invention;

FIG. 8 is a schematic structural view of the carrier rod of the present invention;

FIG. 9 is another schematic view of the combination of the reflection plate and the lift pin of the present invention.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 9. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 3-7, the circuit breaker of the present invention includes a contact support 2 and a moving contact 11 disposed on the contact support 2, wherein the contact support 2 is used for driving the moving contact 11 to contact with and separate from a fixed contact 12 to realize opening and closing of the circuit breaker; the switch comprises a fixed contact 12 and is characterized by further comprising a switch module 3, a reflecting plate is arranged above the fixed contact, the reflecting plate is provided with a movable ejector rod 5, the ejector rod 5 can be driven to move by rotation of the contact support 2, and the state switching of the switch module 3 can be triggered when the ejector rod 5 moves.

According to the circuit breaker, the movable ejector rod 5 is arranged on the reflecting plate, the contact support 2 pushes the ejector rod 5 to move while acting, the operating state of the circuit breaker is indicated through the driving switch module 3 of the ejector rod 5, the reflecting plate in the existing circuit breaker is effectively utilized, the reflecting plate can play a role of assisting in indicating the operating state of the circuit breaker on the basis of protecting the fixed contact 12 and blocking air, the ejector rod 5 is installed on the reflecting plate, is assembled in the shell 1 together, and is convenient to be matched with the contact support 2.

As shown in fig. 1-2, the circuit breaker of this embodiment is a three-pole molded case circuit breaker, and includes three main loops, namely a first loop 1P, a second loop 2P and a third loop 3P, which are sequentially arranged, each main loop includes a contact support 2, a movable contact 11 and a fixed contact 12, the contact supports 2 of the three main loops are connected, the contact support 2 includes a rotating shaft portion 21 rotatably mounted on the housing 1, and two support portions 22 arranged on one side of the rotating shaft portion 21, the two support portions 22 are respectively located on two sides of the movable contact 11, when the movable contact 11 is driven by the contact support 2 to rotate, the support portion 22 on the contact support 2 is matched with the push rod 5, and then the switch module 3 is driven by the push rod 5, the switch module 3 of this embodiment includes a micro switch and a trigger button 31, the micro switch is connected with an indication circuit (not shown in the figure), when the push rod 5 is close to the switch module 3, the trigger button 31 is pressed, when the ejector rod 5 is far away from the switch module 3, the trigger button 31 is loosened, the trigger button 31 is pressed and the trigger button 31 is loosened to respectively trigger the switching state of the micro switch, the indicating circuit is driven to indicate when the switching state of the micro switch is realized, and the indicating circuit can display the working state of the circuit breaker in modes of LED, sound or remote signals and the like. In this embodiment, an operating mechanism (not shown) and a handle 13 are provided above the contact support 2 of the second circuit 2P, mounting grooves 30 for mounting accessory modules are provided above the contact supports 2 of the first circuit 1P and the third circuit 3P, respectively, the mounting grooves 30 on the first circuit 1P and the third circuit 3P are oppositely disposed on both sides of the operating mechanism, and the switch module 3 of this embodiment is mounted in the mounting groove 30 above the first circuit 1P and may also be mounted in the mounting groove 30 above the third circuit 3P. It is understood that the present invention may be used for circuit breakers of single pole and other numbers of poles, and is not limited thereto.

As shown in fig. 3, an arc extinguishing chamber 6 is arranged above the fixed contact 12, the movable contact 11 extends into the arc extinguishing chamber 6 and is matched with the fixed contact 12, the arc extinguishing chamber 6 comprises two oppositely arranged clamping plates (not shown in the figure) and a plurality of arc extinguishing bars (not shown in the figure) arranged between the two clamping plates, the middle parts of the arc extinguishing bars are respectively provided with an arc extinguishing opening of a V-shaped structure, the arc extinguishing opening is used for avoiding the movable contact 11, the arc extinguishing bars respectively form arc extinguishing sections on two sides of the arc extinguishing opening, and electric arcs generated between the movable contact 11 and the fixed contact 12 are cut off through the arc extinguishing bars.

As shown in fig. 6, the reflection plate includes a front reflection portion 41, a rear reflection portion 43, and a lower reflection portion 42 connected between the front reflection portion 41 and the rear reflection portion 43, the lower reflection portion 42 is disposed between the upper side of the static contact 12 and the arc extinguish chamber 6, an avoidance hole 44 is disposed in the middle of the lower reflection portion 42, the avoidance hole 44 can be sleeved on the contact of the static contact 12, and the upper surface of the static contact 12 is shielded by other portions of the lower reflection portion 42 to protect the static contact 12; preceding reflection part 41 sets up the one side that is close to contact support 2 at two splint of explosion chamber 6, back reflection part 43 sets up the one side of keeping away from contact support 2 of two splint of explosion chamber 6, preceding reflection part 41 and back reflection part 43 enclose into inclosed space with two splint of explosion chamber 6, control the interior gas flow direction of explosion chamber 6, drive the arc through the gas flow direction and remove, can improve the breaking capacity of circuit breaker. Preferably, the reflecting plate is made of a gas generating material, and the gas generating material can generate gas to improve the effect of guiding the electric arc by the gas flow.

As shown in fig. 6 to 7, the front reflection part 41 includes a reflection seat 45 and two reflection columns 46 respectively disposed on the reflection seat 45, the two reflection columns 46 respectively correspond to arc extinguishing sections on two sides of the arc extinguishing grid plate, an avoiding groove 47 corresponding to an arc extinguishing port on the arc extinguishing grid sheet is formed between the two reflecting columns 46, the avoiding groove 47 is used for avoiding the moving contact 11, the ejector rod 5 is arranged on the reflecting column 46 on one side in a sliding manner, the gas in the arc chute 6 is blocked from escaping from the direction of the contact support 2 to the location of other mechanisms in the circuit breaker by the reflective columns 46, other mechanisms in the circuit breaker are protected, the avoidance groove 47 can avoid the moving contact 11, when the circuit breaker is closed, the contact support 2 can drive the moving contact 11 to swing downwards to be contacted with the static contact 12, and when the breaker is opened, the contact support 2 can drive the moving contact 11 to swing upwards to be separated from the static contact 12.

This embodiment indicates the combined floodgate state and the separating brake state of circuit breaker through ejector pin 5, ejector pin 5 is connected with spring 7, and spring 7 drive ejector pin 5 promotes switch module 3, contact support 2 when the circuit breaker combined floodgate, promotes ejector pin 5 and overcomes the spring 7 effect and keep away from switch module 3, instructs the separating brake state, and contact support 2 loosens ejector pin 5 release spring 7 when the circuit breaker separating brake, promotes the instruction module through spring 7 drive ejector pin 5, instructs the separating brake state. It is to be understood that the indication unit may also be used for indicating only one of the closing state and the opening state, or both, and is not limited herein.

As shown in fig. 8, the top rod 5 of the present embodiment includes a top plate 51 and a bottom plate 52 disposed opposite to each other, and a side plate connected between one side of the top plate 51 and one side of the bottom plate 52, the side plate is slidably mounted on the reflection column 46, the bottom plate 52 is provided with a fixing column 71 for limiting the position of the spring 7 on a side away from the top plate 51, the spring 7 is connected between the reflection seat 45 and the top rod 5, one end of the spring 7 is sleeved on the fixing column 71 for limiting, one end of the spring 7 away from the fixing column 71 is inserted into a sleeve 72 on the reflection seat 45 for limiting, the support portion 22 of the contact support 2 extends between the top plate 51 and the bottom plate 52, when the circuit breaker is closed, the support portion 22 swings downward, the bottom plate 52 is pushed by the bottom side of the support portion 22, the top rod 5 is driven to move downward against the elastic force of the spring 7, when the circuit breaker is opened, the support portion 22 swings upward, the bottom side of the support portion 22 is away from the bottom plate 52 and releases the spring 7, the pushing of the bottom plate 52 by the spring 7 drives the ram 5 to move upward and push the switch module 3.

It can be understood that the spring 7 may not be provided, and when the circuit breaker is opened, the contact support 2 may directly push the top plate 51 to drive the ejector rod 5 to move, but the spring 7 drives the ejector rod 5 to push the switch module 3, so that the obstruction to the contact support 2 can be reduced, the moving contact 11 is prevented from leaving the stationary contact 12, and the moving contact 11 and the stationary contact 12 can be accelerated to be separated under the action of the spring 7, which all belong to the protection scope of the present invention.

As shown in fig. 6-9, the side plates include an upper side plate 53 and a lower side plate 54 connected to each other, the upper side plate 53 and the lower side plate 54 are respectively connected to the top plate 51 and the bottom plate 52, the upper side plate 53 is disposed on one side of the lower side plate 54 close to the reflective column 46, the lower side plate 54 is perpendicular to the upper side plate 53, the side surface of the upper side plate 53 is provided with a guide rail 8 slidably mounted on the reflective column 46, the reflective column 46 is of a hollow structure, and the top rod 5 is provided with a guide rail 8 slidably inserted into the reflective column 46. Specifically, the inside of reflection post 46 is equipped with hollow groove 81, is equipped with guide way 82 on hollow groove 81's lateral wall, guide rail 8 transverse section is T type structure, guide rail 8 include first deflector 83 and connect first deflector 83 with second deflector 84 between the curb plate 53, second deflector 84 is in hollow groove 81 removes, first deflector 83 is in slide in guide way 82.

Through with ejector pin 5 slidable mounting on the reflection post 46 of reflecting plate, can effectively utilize hollow structure's reflection post 46, set up guide way 82 on reflection post 46 and just can with ejector pin 5 slidable mounting on the reflecting plate, have simple structure, convenient assembling and small characteristics. Preferably, the lower side plate 54 is bent outward to form a curved structure 55, which can increase the contact area with the spring 7.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. The utility model provides a circuit breaker, contact support (2) and set up moving contact (11) on contact support (2), contact support (2) can drive moving contact (11) and static contact (12) contact and separate its characterized in that: the switch is characterized by further comprising a switch module (3), a reflecting plate is arranged above the static contact (12), a movable ejector rod (5) is arranged on the reflecting plate, the ejector rod (5) can be driven to move by rotation of the contact support (2), and the state switching of the switch module (3) can be triggered when the ejector rod (5) moves.

2. The circuit breaker of claim 1, wherein: the circuit breaker is characterized by further comprising a spring (7) connected with the ejector rod (5), wherein the contact support (2) pushes the ejector rod (5) to compress the spring (7) when the rotation-driven circuit breaker is switched on, releases the spring (7) when the rotation-driven circuit breaker is switched off, and drives the ejector rod (5) to push the switch module (3) through the spring (7).

3. The circuit breaker of claim 2, wherein: the contact support (2) comprises a support part (22) extending between the top plate (51) and the bottom plate (52), and the bottom side of the support part (22) can push the bottom plate (52) to drive the ejector rod (5) to compress the spring (7).

4. The circuit breaker of claim 2, wherein: the reflecting plate comprises a reflecting seat (45) and two reflecting columns (46) respectively arranged on the reflecting seat (45), wherein a groove (47) used for avoiding the moving contact (11) is formed between the two reflecting columns (46), the ejector rod (5) is arranged on the reflecting columns (46) in a sliding mode, and the spring (7) is connected between the reflecting seat (45) and the ejector rod (5).

5. The circuit breaker of claim 4, wherein: the reflection column (46) is of a hollow structure, and a guide rail (8) which is inserted into the inner side of the reflection column (46) and slides is arranged on the ejector rod (5).

6. The circuit breaker of claim 5, wherein: the inboard of reflection post (46) is equipped with hollow groove (81), is equipped with guide way (82) on the lateral wall of hollow groove (81), guide rail (8) are including first deflector (83) and second deflector (84), second deflector (84) are in remove in hollow groove (81), first deflector (83) are in slide in guide way (82).

7. The circuit breaker of claim 3, wherein: the side plates comprise an upper side plate (53) and a lower side plate (54) which are connected, the upper side plate (53) and the lower side plate (54) are respectively connected with the top plate (51) and the bottom plate (52), the upper side plate (53) is arranged on one side, close to the reflecting column (46), of the lower side plate (54), the lower side plate (54) and the upper side plate (53) are vertically arranged, and the upper side plate (53) is slidably mounted on the reflecting plate.

8. The circuit breaker of claim 4, wherein: be equipped with sleeve (72) on reflection seat (45), spring (7) keep away from the one end of ejector pin (5) and insert spacing in sleeve (72).

9. The circuit breaker of claim 1, wherein: the top of static contact (12) is equipped with explosion chamber (6), the reflecting plate includes preceding reflection part (41) and back reflection part (43) to and lower reflection part (42) of connection between preceding reflection part (41) and back reflection part (43), reflection part (42) set up down between static contact (12) top and explosion chamber (6), reflection part (42) middle part is equipped with dodges hole (44) down, preceding reflection part (41) set up the one side that is close to contact support (2) in explosion chamber (6), back reflection part (43) set up the one side of keeping away from contact support (2) in explosion chamber (6).

10. The circuit breaker of claim 1, wherein: switch module (3) include micro-gap switch and trigger button (31), and micro-gap switch is connected with indicating circuit, push rod (5) compress tightly trigger button (31) when being close to switch module (3), release trigger button (31) when switch module (3) are kept away from in push rod (5), compress tightly trigger button (31) and loosen trigger button (31) and can trigger micro-gap switch switching state respectively, and drive indicating circuit indicates during micro-gap switch switching state.