CN215869203U

CN215869203U - Circuit breaker

Info

Publication number: CN215869203U
Application number: CN202121849473.0U
Authority: CN
Inventors: 王强; 郭德鑫; 李磊鹏; 毛显饶; 刘亮
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-02-18
Anticipated expiration: 2031-08-09

Abstract

The utility model provides a circuit breaker, includes casing and the contact support of setting in the casing, is equipped with the moving contact on the contact support, the casing includes that base and lid close the well lid on the base, in cover and be equipped with the switch module who is connected with indicating circuit, be equipped with the ejector pin on the base, the ejector pin respectively with switch module and contact support cooperation, the contact support can drive the ejector pin when rotating and remove, can trigger switch module switching state when the ejector pin removes, indicate the operating condition of circuit breaker through indicating circuit, drive switch module 3 switching state through ejector pin 4 and instruct the operating condition of circuit breaker, and ejector pin 4 and switch module 3 set up respectively on base 15 and well lid 16 in addition, still have small and convenient assembling's characteristics.

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. Although the accessory module can be installed on the circuit breaker and the working state of the circuit breaker is indicated through the accessory module, the circuit breaker has the defects of large volume, high cost and non-universality. And for the circuit breaker of little shell frame, the accessory module quantity that can install on the circuit breaker of every little shell frame is limited, if install the accessory module that is used for instructing circuit breaker operating condition, then can occupy the position of other accessory modules, on the circuit breaker just can't be installed to accessory modules such as shunt tripping module and undervoltage tripping module, it is very inconvenient to use. In addition, although the existing circuit breaker can also be provided with an indicating device in the shell, the existing circuit breaker has the defects of complex structure and large occupied space, and the structure of the existing circuit breaker needs to be changed, so that the realization cost is high.

SUMMERY OF THE UTILITY MODEL

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

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

the utility model provides a circuit breaker, includes casing and the contact support of setting in the casing, is equipped with the moving contact on the contact support, the casing includes that base and lid close the well lid on the base, well cover and be equipped with the switch module who is connected with indicating circuit, be equipped with the ejector pin on the base, the ejector pin respectively with switch module and contact support cooperation, the contact support can drive the ejector pin when rotating and remove, can trigger switch module switching state when the ejector pin removes, instructs the operating condition of circuit breaker through indicating circuit.

Preferably, the base comprises two opposite side walls and a plurality of groups of moving contacts arranged between the two side walls, a partition plate is arranged between the plurality of groups of moving contacts, and the ejector rod is arranged on the side walls.

Preferably, the ejector rod is slidably mounted on a fixed seat, and the fixed seat is fixedly mounted on the base.

Preferably, the outside of fixing base is equipped with the limiting plate, be equipped with on the base with fixing base complex fixed slot, be equipped with in the fixed slot with limiting plate complex spacing groove.

Preferably, the ejector rod is connected with the fixed seat through a spring, the spring can drive the ejector rod to push the switch module to switch states, and the contact can drive the ejector rod to move away from the switch module under the action of the spring when supporting and rotating.

Preferably, the ejector pin includes the installation department of slidable mounting on the fixing base to and set up the action portion on installation department one side respectively with switch module and contact support cooperation, be equipped with in the fixing base with installation department complex spout, be equipped with the mouth of dodging that is used for dodging the action portion in the side of spout.

Preferably, the action part comprises a top plate and a bottom plate which are arranged oppositely, and a side plate connected between one side of the top plate and one side of the bottom plate, the top plate is matched with the switch module, the contact support extends between the top plate and the bottom plate, and the contact support pushes the bottom plate to drive the top plate to be far away from the switch module when the circuit breaker is switched on.

Preferably, the installation department is connected with the action portion, and the horizontal width of installation department is greater than the horizontal width of curb plate, is equipped with the spacing step with the spacing complex of fixing base in the installation department near one side of action portion.

Preferably, the fixing base includes two relative splint that set up to and connect the backplate between two splint one sides, be equipped with down the baffle between the bottom of two splint, two splint are equipped with preceding baffle respectively in the one side of keeping away from the backplate, and the preceding baffle of two splint separates to form and dodges the mouth, enclose between two splint, two preceding baffle, backplate and lower baffle with installation department complex spout, pass through spring coupling between the installation department of lower baffle and ejector pin.

Preferably, preceding baffle on two splint sets up respectively one side of baffle forms the groove of dodging of U type down between baffle and two preceding baffles, the curb plate of ejector pin passes and dodges between the groove inserts two preceding baffles, the curb plate respectively with two preceding baffle sliding fit.

The circuit breaker provided by the utility model has the characteristics that the working state of the circuit breaker is indicated by driving the switching state of the switch module through the ejector rod, and the ejector rod and the switch module are respectively arranged on the base and the middle cover, and the circuit breaker also has the characteristics of small volume and convenience in assembly.

Drawings

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

figure 2 is a cross-sectional view of the circuit breaker of the present invention;

FIG. 3 is a schematic view of the mating of the contact support and the carrier rod of the present invention;

FIG. 4 is a schematic view of the base of the present invention in cooperation with a middle cap;

FIG. 5 is an enlarged view of a portion of FIG. 4 of the present invention;

FIG. 6 is a schematic view of the base, the fixing base, the spring and the rod of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 of the present invention;

FIG. 8 is a schematic structural view of the fixing base of the present invention;

FIG. 9 is a schematic structural view of the carrier rod of the present invention;

fig. 10 is a circuit breaker of the present invention in a closed state;

fig. 11 is a circuit breaker of the present invention in an open state.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 11. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-6, the circuit breaker includes a housing 1 and a contact support 2 disposed in the housing 1, a movable contact 11 is disposed on the contact support 2, the housing 1 includes a base 15 and a middle cover 16 covering the base 15, a switch module 3 connected to an indication circuit is disposed on the middle cover 16, a push rod 4 is disposed on the base 15, the push rod 4 is respectively matched with the switch module 3 and the contact support 2, the contact support 2 can drive the push rod 4 to move when rotating, the push rod 4 can trigger the switch module 3 to switch states when moving, and the indication circuit indicates a working state of the circuit breaker.

The circuit breaker provided by the utility model has the characteristics that the working state of the circuit breaker is indicated by driving the switching state of the switch module 3 through the ejector rod 4, and the ejector rod 4 and the switch module 3 are respectively arranged on the base 15 and the middle cover 16, and the circuit breaker also has the characteristics of small volume and convenience in assembly.

As shown in fig. 1-5, 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 moving contact 11 and a fixed contact, 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 moving contact 11, when the moving 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 4, and then the switch module 3 is driven by the push rod 4, the switch module 3 of this embodiment includes a micro switch 32 and a trigger button 31, the micro switch 32 is connected with an indication circuit (not shown in the figure), when the push rod 4 is close to the switch module 3, the trigger button 31 is pressed, when the ejector rod 4 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 microswitch 32, the microswitch 32 drives the indicating circuit to indicate when the switching state is switched, 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 in the figure) and a handle (not shown in the figure) are disposed above the contact support 2 of the second loop 2P, the housing 1 includes a base 15, an intermediate cover 16 and an upper cover which are sequentially disposed from bottom to top, the intermediate cover 16 is respectively disposed above the contact support 2 of the first loop 1P and the third loop 3P corresponding to the base 15, the mounting grooves 30 on the first loop 1P and the third loop 3P are oppositely disposed at two sides of the operating mechanism, the upper cover covers the intermediate cover 16 to shield the mounting grooves 30, the push rod 4 of this embodiment is mounted on the base 15, the switch module 3 of this embodiment is mounted in the mounting groove 30 above the first loop 1P, and may also be mounted in the mounting groove 30 above the third loop 3P.

As shown in fig. 4-7, the base 15 includes two side walls 12 disposed opposite to each other, and a plurality of sets of movable contacts 11 disposed between the two side walls 12, a partition 17 is disposed between the plurality of sets of movable contacts 11, and the post 4 is disposed inside one of the two side walls 12. As shown in fig. 4, the three-pole circuit breaker of the present embodiment includes three sets of circuits, wherein the three sets of circuits are separated by a partition 17 between the first main circuit 1P and the second main circuit 2P, and between the second main circuit 2P and the third main circuit 3P. It can be understood that the ejector rod 4 can also be arranged on the partition plate 17, but the ejector rod 4 is arranged on the inner side of the side wall 12, so that the ejector rod 4 can be prevented from being arranged on the partition plate 17, and further, the electric safety between the main circuits on two sides of the partition plate 17 is ensured not to be influenced, the structure of the existing circuit breaker is not required to be changed, extra space is not required to be occupied, and the difficulty of assembly can be further reduced. Of course, the circuit breaker can also be used for single-pole circuit breakers and circuit breakers with other poles, and is not particularly limited herein. In addition, in this embodiment, the ejector rod 4 is disposed on the side wall 12, so that the switch module 3 can be installed on one side of the first main circuit 1P away from the bottom second main circuit 2P, or on one side of the third main circuit 3P away from the second main circuit 2P, and it can be avoided that the switch module 3 is installed at a position where the original accessory modules such as the shunt tripping module and the under-voltage tripping module are installed, that is, one side of the first main circuit 1P close to the second main circuit 2P, and one sides of the third main circuit 3P close to the second main circuit 2P are respectively reserved, so that the switch module 3 does not occupy a position where the original accessory modules such as the shunt tripping module and the under-voltage tripping module are installed.

As shown in fig. 4-7, the push rod 4 is slidably mounted on the fixing seat 5, and the fixing seat 5 is fixedly mounted on the base 15 of the housing 1. Be equipped with spout 50 in the fixing base 5, be equipped with inserted hole and lower baffle 53 respectively at the upper and lower both ends of spout 50, ejector pin 4 includes the installation department 41 of slidable mounting on fixing base 5 to and set up the action portion 42 in installation department 41 one side, action portion 42 respectively with switch module 3 and contact support 2 cooperations, the side of spout 50 is equipped with the mouth of dodging that is used for dodging action portion 42, and in the installation department 41 of ejector pin 4 inserted spout 50 from the inserted hole, ejector pin 4 drove installation department 41 and slided from top to bottom in spout 50 when promoting and leaving switch module 3.

The ejector rod 4 of this embodiment is installed on casing 1 through fixing base 5, can assemble ejector rod 4 and fixing base 5 earlier as an organic whole, installs casing 1 again together on, has convenient assembling's characteristics. As shown in fig. 6-7, the ejector rod 4 is connected to the fixing seat 5 through a spring 6, the fixing seat 5 and the ejector rod 4 are respectively provided with a lower spring column 55 and an upper spring column 47, two ends of the spring 6 are respectively sleeved on the lower spring column 55 and the upper spring column 47 for limiting, the spring 6 can drive the ejector rod 4 to push the switch module 3 to switch states, and the contact support 2 can drive the ejector rod 4 to move away from the switch module 3 against the action of the spring 6 when rotating.

In this embodiment, the contact support 2 is configured to drive the push rod 4 to move away from the switch module 3 and compress the spring 6 when rotating in the closing direction, as shown in fig. 10, to indicate the opening operating state of the circuit breaker, i.e., the closing state; as shown in fig. 11, in the open state, the spring 6 drives the plunger 4 to push the switch module 3 when the contact support 2 rotates in the open direction, and the plunger 4 can trigger the switch module 3 to switch states when pushing the switch module 3 and when leaving the switch module 3, and can be used for indicating the closed state and the open state respectively, or can be used for indicating only one of the closed state and the open state, and both belong to the working states of the present invention. In the embodiment, the spring 6 is released in the brake-separating process, and the separation of the moving contact 11 and the static contact can be accelerated, so that the breaking capacity of the circuit breaker is improved.

It can be understood that the spring 6 may also be a tension spring or a torsion spring, or the spring 6 may not be provided, and when opening the brake, the contact support 2 may also directly push the push rod 4 to trigger the switch module 3, all of which belong to the protection scope of the present invention.

As shown in fig. 9, the specific structure of the top rod 4 of the embodiment, the action part 42 is substantially in a C-shaped structure, the action part 42 includes a top plate 43 and a bottom plate 45 which are oppositely arranged up and down, and a side plate 44 connected between one side of the top plate 43 and one side of the bottom plate 45, the top plate 43 is engaged with the switch module 3, the support part 22 of the contact support 2 extends between the top plate 43 and the bottom plate 45, the top side of the bottom plate 45 is engaged with the support part 22 of the contact support 2, the top side of the top plate 43 is engaged with the switch module 3, when the circuit breaker is closed, the bottom side of the support part 22 of the contact support 2 pushes the top side of the bottom plate 45, and further drives the top rod 4 to move downwards, so that the top plate 43 is far away from the switch module 3, when the circuit breaker is opened, the support part 22 of the contact support 2 is far away from the bottom plate 45, the mounting part 41 is pushed by the spring 6 to drive the top rod 4 to move upwards, the trigger switch module 3 is pushed by the top plate 43;

installation department 41 is connected with the curb plate 44 of action portion 42, is equipped with on installation department 41 with spring 6 complex go up spring post 47, the transverse width of installation department 41 is greater than the transverse width of curb plate 44, is equipped with spacing step 46 respectively at the both ends that installation department 41 is close to action portion 42 one side, and the distance of the spacing step 46 of both sides is greater than the mouth width is dodged to spout 50 side, and spacing step 46 and the spacing cooperation of fixing base 5 guarantee that during the ejector pin 4 slides from top to bottom, installation department 41 can be reliably spacing in spout 50.

It will be appreciated that the actuating portion 42 may have other configurations, for example, the bottom plate 45 is not provided, the contact support 2 may push the top plate 43 directly to trigger the switch module 3, or the top plate 43 may be connected to the contact support 2 by a hook or other means. In addition, the mounting portion 41 may have other shapes, for example, the mounting portion 41 is provided with the limit step 46 only on one side of the operating portion 42, which falls within the protection scope of the present invention.

As fig. 8 shows a specific structure of the fixing base 5 of the present embodiment, the fixing base 5 of the present embodiment includes two clamping plates 51 oppositely disposed, and a rear baffle 52 connected between one sides of the two clamping plates 51, a lower baffle 53 is disposed between bottoms of the two clamping plates 51, the two clamping plates 51 are respectively provided with a front baffle 54 on one side far away from the rear baffle 52, the front baffles 54 of the two clamping plates 51 form an avoidance opening for avoiding the actuating portion 42 at an interval, a sliding groove 50 engaged with the mounting portion 41 is defined between the two clamping plates 51, the two front baffles 54, the rear baffle 52 and the lower baffle 53, and an insertion opening for avoiding the mounting portion 41 is formed between tops of the two clamping plates 51;

the lower baffle 53 is provided with a lower spring post 55, the lower baffle 53 is connected with the mounting part 41 through a spring 6, two ends of the spring 6 are respectively sleeved on the lower spring post 55 and the upper spring post 47, the width of the rear baffle 52 is larger than the distance between the outer sides of the two clamping plates 51, the rear baffle 52 is provided with a limit plate 56 which is arranged in parallel with the height direction of the fixed seat 5 correspondingly to the outer sides of the two clamping plates 51, be equipped with on casing 1's the lateral wall 12 with fixing base 5 complex fixed slot 18 (fig. 7), the top and one side of fixed slot 18 are opened, be equipped with respectively on the relative both sides inner wall of fixed slot 18 with limiting plate 56 complex spacing groove 19, limiting plate 56 can insert spacing inslot 19 spacing, will follow horizontal fixing base 5 spacing in fixed slot 18, and well lid 16 assembles and can follow the top on base 15 and vertically spacing fixing base 5, does not need extra part to fix fixing base 5. It is understood that the position-limiting plate 56 can be disposed at other positions, such as the middle of the two clamping plates 51, and fall within the protection scope of the present invention.

Further, the front baffles 54 on the two clamping plates 51 are respectively arranged on one side of the lower baffle 53, a U-shaped avoiding groove 57 is formed between the lower baffle 53 and the two front baffles 54, the side plate 44 of the ejector rod 4 penetrates through the avoiding groove 57 and is inserted between the two front baffles 54, and the side plate 44 is respectively in sliding fit with the two front baffles 54. Through forming the dodging groove 57 used for dodging the side plate 44 on the ejector pin 4 between the lower baffle plate 53 and the two front baffle plates 54, the side plate 44 can be inserted between the two front baffle plates 54 in a sliding fit manner, so that the guide effect of the ejector pin 4 can be achieved, the problems of deflection and the like of the ejector pin 4 in the moving process are prevented, the structure is more compact, and the occupied space is smaller.

Further, the inner sides of the two clamping plates 51 are respectively provided with a positioning block 58, the mounting part 41 of the ejector rod 4 is provided with a positioning groove 48 which is respectively matched with the two positioning blocks 58, the positioning blocks 58 can limit the mounting part 41 in the sliding groove 50 of the fixing seat 5, and the mounting part 41 can be abutted to the positioning blocks 58 under the driving of the spring 6, so that the fixing seat 5, the ejector rod 4 and the spring 6 can be assembled into a whole in advance, and then the fixing seat, the ejector rod and the spring 6 are assembled into the shell 1 together, and the assembling difficulty is effectively reduced.

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, includes casing (1) and sets up contact support (2) in casing (1), is equipped with moving contact (11), its characterized in that on contact support (2): casing (1) includes base (15) and lid and closes well lid (16) on base (15), be equipped with on well lid (16) switch module (3) of being connected with indicating circuit, be equipped with ejector pin (4) on base (15), ejector pin (4) respectively with switch module (3) and contact support (2) cooperation, contact support (2) can drive ejector pin (4) when rotating and remove, can trigger switch module (3) switching state when ejector pin (4) remove, indicate the operating condition of circuit breaker through indicating circuit.

2. The circuit breaker of claim 1, wherein: the base (15) comprises two opposite side walls (12) and a plurality of groups of moving contacts (11) arranged between the two side walls (12), a partition plate (17) is arranged between the plurality of groups of moving contacts (11), and the ejector rod (4) is arranged on the side walls (12).

3. The circuit breaker of claim 1, wherein: the ejector rod (4) is slidably mounted on the fixing seat (5), and the fixing seat (5) is fixedly mounted on the base (15).

4. The circuit breaker of claim 3, wherein: the outer side of the fixing seat (5) is provided with a limiting plate (56), the base (15) is provided with a fixing groove (18) matched with the fixing seat (5), and a limiting groove (19) matched with the limiting plate (56) is formed in the fixing groove (18).

5. The circuit breaker of claim 3, wherein: the ejector rod (4) is connected with the fixing seat (5) through the spring (6), the spring (6) can drive the ejector rod (4) to push the switch module (3) to be switched, and the contact support (2) can drive the ejector rod (4) to move away from the switch module (3) under the action of the spring (6) when rotating.

6. The circuit breaker of claim 3, wherein: ejector pin (4) including slidable mounting installation department (41) on fixing base (5) to and set up action portion (42) in installation department (41) one side respectively with switch module (3) and contact support (2) cooperation, be equipped with in fixing base (5) with installation department (41) complex spout (50), be equipped with the mouth of dodging that is used for dodging action portion (42) in the side of spout (50).

7. The circuit breaker of claim 6, wherein: the action part (42) comprises a top plate (43) and a bottom plate (45) which are arranged oppositely, and a side plate (44) connected between one sides of the top plate (43) and the bottom plate (45), the top plate (43) is matched with the switch module (3), the contact support (2) extends between the top plate (43) and the bottom plate (45), and the contact support (2) pushes the bottom plate (45) to drive the top plate (43) to be far away from the switch module (3) when the circuit breaker is switched on.

8. The circuit breaker of claim 6, wherein: the installation part (41) is connected with the action part (42), the transverse width of the installation part (41) is greater than that of the side plate (44), and one side, close to the action part (42), of the installation part (41) is provided with a limiting step (46) in limiting fit with the fixed seat (5).

9. The circuit breaker of claim 6, wherein: fixing base (5) are including relative two splint (51) that set up to and backplate (52) of connection between two splint (51) one side, are equipped with down baffle (53) between the bottom of two splint (51), baffle (54) before two splint (51) are equipped with respectively in the one side of keeping away from backplate (52), and the mouth is dodged in preceding baffle (54) interval formation of two splint (51), enclose between two splint (51), two preceding baffle (54), backplate (52) and lower baffle (53) with installation department (41) complex spout (50), be connected through spring (6) between installation department (41) of lower baffle (53) and ejector pin (4).

10. The circuit breaker of claim 9, wherein: preceding baffle (54) on two splint (51) set up respectively one side of baffle (53) down forms between baffle (53) and two preceding baffle (54) the U type under and dodges groove (57), curb plate (44) of ejector pin (4) pass and dodge groove (57) and insert between two preceding baffle (54), curb plate (44) respectively with two preceding baffle (54) sliding fit.