CN220065489U - Arc extinguishing chamber and circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of piezoelectric devices, and discloses an arc extinguishing chamber and a circuit breaker. The arc extinguishing chamber comprises side plates and grid plates, wherein the two side plates are oppositely arranged, guide grooves extending along a first direction are respectively arranged on the opposite side walls of the two side plates, and a supporting block and a limiting block are arranged on one side plate; one end of the grid plate is provided with a first boss and a second boss, the first boss can slide along the guide groove and is clamped between the supporting block and the limiting block, the second boss is embedded in the guide groove, and the other end of the grid plate is arranged in the guide groove of the other side plate; the circuit breaker includes casing and above explosion chamber, and the explosion chamber is located in the casing. The utility model can reduce the assembly difficulty of the arc extinguishing chamber, improve the manufacturability and the assembly efficiency, reduce the cost, improve the assembly quality and improve the consistency of the circuit breaker products.

Description

Arc extinguishing chamber and circuit breaker

Technical field

The utility model relates to the technical field of low-voltage electrical appliances, in particular to arc extinguishing chambers and circuit breakers.

Background technique

The arc extinguishing chamber is an important part of the circuit breaker. The arc extinguishing chamber is usually composed of multiple layers of grid plates arranged at intervals. The arc generated inside the circuit breaker will be introduced into the arc extinguishing chamber under the action of hot air flow or electromagnetic force. Between them, through the cutting function of the arc extinguishing chamber, the long arc can be divided into multiple short arcs to achieve the arc extinguishing effect and ensure the safety of the electrical system.

At present, the structure of the arc extinguishing chamber includes two side plates arranged oppositely on the outermost side, a plurality of arc extinguishing grids arranged at intervals between the two side plates, and other auxiliary structures. Among them, the grid plate and the side plate of the arc extinguishing chamber are usually fixed by riveting to form support and limitation between each other.

This assembly method of the arc extinguishing chamber usually requires the use of special assembly tooling, which makes the assembly process of the arc extinguishing chamber cumbersome and complex, with low efficiency, high cost, difficult riveting quality control, and poor consistency of circuit breaker products.

Utility model content

The purpose of this utility model is to provide an arc extinguishing chamber and a circuit breaker, which can reduce the assembly difficulty of the arc extinguishing chamber, improve the craftsmanship and assembly efficiency, reduce the cost, improve the assembly quality, and thereby improve the consistency of the circuit breaker product.

To achieve this purpose, the utility model adopts the following technical solutions:

Arc extinguishing chamber, including:

Side plates, two of the side plates are arranged oppositely, and the opposite side walls of the two side plates are respectively provided with guide grooves extending in the first direction, and one of the side plates is provided with a support block and a limiter. piece;

A grid plate, one end of which is provided with a first boss and a second boss, and the first boss can slide along the guide groove and be clamped between the support block and the limiting block, so The second boss is embedded in the guide groove, and the other end of the grid plate is placed in the guide groove of the other side plate.

As an optional solution for the arc extinguishing chamber, the support block and the limit block are arranged at intervals along the first direction, and a receiving groove is formed between the support block and the limit block, and the first The boss is placed in the receiving groove.

As an alternative to the arc extinguishing chamber, the support block is disposed close to the guide groove, and one end of the support block close to the guide groove extends obliquely in a direction away from the guide groove.

As an alternative to the arc extinguishing chamber, the support block, the limiting block and the side plate are of an integrated structure.

As an optional solution for the arc extinguishing chamber, the support block is in a strip shape, and the support block extends along the second direction.

As an optional solution for the arc extinguishing chamber, the two side plates are connected through two connecting plates arranged oppositely, and the two side plates and the two connecting plates are surrounded to form an arc extinguishing frame.

As an alternative to the arc extinguishing chamber, the arc extinguishing frame has an integrated structure.

As an optional solution for the arc extinguishing chamber, one end of the grid plate is provided with a plurality of second bosses spaced apart along the first direction.

As an optional solution for the arc extinguishing chamber, one end of the grid plate close to the first boss is provided with a rounded corner.

The circuit breaker includes a housing and an arc extinguishing chamber according to any of the above solutions, and the arc extinguishing chamber is provided in the housing.

Beneficial effects:

In the first aspect of the present invention, when assembling the components of the arc extinguishing chamber, the first boss and the second boss of the grid are slid along the guide groove and the first boss is matched with the support block to complete the process. and the supporting block; and then through the joint limiting effect of the limiting block and the supporting block, the first boss is limited in the first direction, thereby realizing the limiting of the grid plate in the first direction; by making the third The two bosses are embedded in the guide groove to realize the position limiting of the grid plate in the second direction; by sandwiching the grid plate between two opposite side plates, the position limiting of the grid plate in the third direction is realized. ; In summary, the grid plate is completely limited, replacing the riveting fixation method between the arc extinguishing chamber and the side plate in the prior art. At the same time, it also avoids the use of special tooling for assembly, reducing the cost of the arc extinguishing chamber. reduce assembly difficulty, improve craftsmanship and assembly efficiency, reduce costs, and improve assembly quality.

In the second aspect of the present invention, a circuit breaker equipped with the arc extinguishing chamber can improve the assembly efficiency and assembly quality of the circuit breaker.

Description of the drawings

Figure 1 is an isometric view of an arc extinguishing chamber provided by an embodiment of the present utility model;

Figure 2 is a schematic assembly diagram of the arc extinguishing chamber provided by the embodiment of the present utility model;

Figure 3 is a schematic cross-sectional view of an arc extinguishing chamber provided by an embodiment of the present utility model;

Figure 4 is a schematic structural diagram of a side plate provided by an embodiment of the present invention.

In the picture:

X, first direction; Y, second direction; Z, third direction;

1. Arc extinguishing frame;

10. Side plate; 110. Guide groove; 120. Support block; 130. Limiting block; 140. Accommodating groove;

20. Grid plate; 210. First boss; 220. Second boss; 211. Fillet;

30. Connection board.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for convenience of description, only some but not all structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless otherwise explicitly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a detachable connection. Integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly stipulated and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features being in direct contact with each other. Features are not in direct contact but through other features between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplified operation, rather than instructions. Or it is implied that the device or component mentioned must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and have no special meaning.

Please refer to the accompanying drawings 1 to 4. One aspect of this embodiment relates to an arc extinguishing chamber. The arc extinguishing chamber includes a side plate 10 and a grid plate 20. The two side plates 10 are arranged opposite to each other. The side walls are respectively provided with guide grooves 110 extending along the first direction Two bosses 220. The first boss 210 can slide along the guide groove 110 and be clamped between the support block 120 and the limiting block 130. The second boss 220 is embedded in the guide groove 110. The other end of the grid plate 20 placed in the guide groove 110 of the other side plate 10 .

In this embodiment, when assembling the arc extinguishing chamber components, the first boss 210 and the second boss 220 of the grid plate 20 are slid along the guide groove 110 and the first boss 210 is slid and locked. It is connected between the supporting block 120 and the limiting block 130 to complete the clamping connection with the supporting block 120; and then through the joint limiting function of the limiting block 130 and the supporting block 120, the first boss 210 reaches the upper limit in the first direction X. position, thereby realizing the position limiting of the grid plate 20 in the first direction X; by embedding the second boss 220 in the guide groove 110, realizing the position limiting of the grid plate 20 in the second direction Y; 20 is sandwiched between two opposite side plates 10 to realize the position limiting of the grid plate 20 in the third direction Z; in summary, the complete position limiting of the grid plate 20 is achieved, avoiding the problems in the prior art. The arc extinguishing chamber and the side plates 10 are usually fixed by riveting, which reduces the assembly difficulty of the arc extinguishing chamber, improves the craftsmanship and assembly efficiency, reduces the cost, and improves the assembly quality. Only one of the side plates 10 is installed There are support blocks 120 and limiting blocks 130, which can facilitate the molding and demolding of parts.

In this embodiment, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

Optionally, the support block 120 is disposed close to the guide groove 110 , and one end of the support block 120 close to the guide groove 110 extends obliquely in a direction away from the guide groove 110 . By slanting the end of the support block 120 close to the guide groove 110 , it is convenient for the first boss 210 to smoothly contact the support block 120 along the inclined surface of the support block 120 in the direction away from the guide groove 110 when contacting the support block 120 . Card access. In other embodiments, the end of the support block 120 close to the guide groove 110 can also be designed as an arc-shaped surface, which can also achieve the same effect of smooth engagement when the first boss 210 contacts the support block 120 .

Optionally, the contact surface between the support block 120 and the first boss 210 is a flat surface. Using a flat surface as the contact surface for snapping can ensure the specified stability of the support block 120 and the first boss 210 being locked together.

Optionally, the supporting block 120 and the limiting block 130 are spaced apart along the first direction In this embodiment, the accommodating groove 140 is formed around the supporting block 120 and the limiting block 130. The accommodating groove 140 can adapt to the structure of the first boss 210 to accommodate the first boss 210; of course, in other embodiments, it can also be used. The receiving groove 140 can be directly opened on the side plate 10 so that the receiving groove 140 is engaged with the first boss 210 .

Optionally, the support block 120, the limiting block 130 and the side plate 10 are of an integrated structure. By making the support block 120 , the limiting block 130 and the side plate 10 have an integrated structure, the number of parts can be reduced, assembly is improved, and costs can be reduced.

Optionally, the support block 120 is in a long strip shape, and the support block 120 extends along the second direction Y. A plurality of grid plates 20 are usually arranged at intervals between the two side plates 10. In order to realize the corresponding snap-in connection of the first boss 210 of each grid plate 20, the support blocks 120 need to be arranged sequentially at the snap-in parts. In order to facilitate the support blocks 120 is integrally formed on the side plate 10, and the support block 120 is designed to be elongated and extend along the second direction Y, so that the extended length of the support block 120 can cover the entire grid plate 20 and snap thereto.

Optionally, the two side plates 10 are connected through two opposite connecting plates 30 , and the two side plates 10 and the two connecting plates 30 surround the arc extinguishing frame 1 . In this embodiment, the two side plates 10 are connected through two connecting plates 30 arranged oppositely. Specifically, the two side plates 10 and the two connecting plates 30 are arranged alternately and connected end to end to form the arc extinguishing frame 1. The plate 30 is only used to connect the two side plates 10 into one body, so the width of the connecting plate 30 can be smaller than that of the side plates 10. Under the conditions of taking into account the connection strength, demoulding effect and arc extinguishing chamber size, the technology in this field Personnel can reasonably optimize the width of the connecting plate 30, and the specific size parameters of the connecting plate 30 are not limited in this embodiment.

Further, the arc extinguishing frame 1 has an integrated structure. By forming the two side plates 10 and the two connecting plates 30 into an integrated structure, the molding of the overall arc extinguishing frame 1 can be facilitated, the number of parts and the assembly process can be reduced, the assembly performance of the arc extinguishing chamber can be improved, and the cost can be reduced.

Optionally, a plurality of second bosses 220 are spaced at one end of the grid plate 20 . In this embodiment, one end of the grid plate 20 is provided with two second bosses 220 spaced apart along the first direction Stable limit of 10. In other embodiments, the number of the second bosses 220 can be reasonably adjusted according to the length of the grid plate 20 .

One end of the grid plate 20 close to the first boss 210 is provided with a rounded corner 211 . In this embodiment, by providing a rounded corner 211 on one end of the grid plate 20 close to the first boss 210, when the grid plate 20 is matched with the guide groove 110 of the side plate 10, the rounded corner 211 can facilitate the grid plate 20. Quickly insert into the guide groove 110 to improve assembly efficiency.

Another aspect of this embodiment also relates to a circuit breaker, which includes a housing and an arc extinguishing chamber above, which can effectively improve the assembly quality of the arc extinguishing chamber, thereby improving the consistency of circuit breaker products.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of the present invention. An exhaustive list of all implementations is neither necessary nor possible. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims (10)

1. Arc extinguishing chamber, characterized by including: Side plates (10), two side plates (10) are arranged opposite each other, and guide grooves (110) extending along the first direction are respectively provided on the opposite side walls of the two side plates (10), one of which The side plate (10) is provided with a support block (120) and a limiting block (130); Grid plate (20). One end of the grid plate (20) is provided with a first boss (210) and a second boss (220). The first boss (210) can move along the guide groove (110). ) slides and snaps between the support block (120) and the limiting block (130), the second boss (220) is embedded in the guide groove (110), and the grid plate (20 ) is placed in the guide groove (110) of the other side plate (10). 2. The arc extinguishing chamber according to claim 1, characterized in that the support block (120) and the limiting block (130) are spaced apart along the first direction, and the support block (120) and A receiving groove (140) is formed between the limiting blocks (130), and the first boss (210) is placed in the receiving groove (140). 3. The arc extinguishing chamber according to claim 1, characterized in that the support block (120) is arranged close to the guide groove (110), and the support block (120) is close to the guide groove (110). One end extends obliquely away from the guide groove (110). 4. The arc extinguishing chamber according to claim 1, characterized in that the support block (120), the limiting block (130) and the side plate (10) are of an integrated structure. 5. The arc extinguishing chamber according to claim 1, characterized in that the support block (120) is elongated, and the support block (120) extends along the second direction. 6. The arc extinguishing chamber according to claim 1, characterized in that the two side plates (10) are connected through two connecting plates (30) arranged oppositely, and the two side plates (10) and The two connecting plates (30) are surrounded to form an arc extinguishing frame (1). 7. The arc extinguishing chamber according to claim 6, characterized in that the arc extinguishing frame (1) is an integrated structure. 8. The arc extinguishing chamber according to claim 1, wherein a plurality of second bosses (220) are provided at one end of the grid plate (20) at intervals along the first direction. 9. The arc extinguishing chamber according to claim 1, characterized in that one end of the grid plate (20) close to the first boss (210) is provided with a rounded corner (211). 10. A circuit breaker, including a casing, characterized in that it further includes an arc extinguishing chamber according to any one of claims 1 to 9, the arc extinguishing chamber being disposed in the casing.