Arc striking structure

Abstract

The utility model provides an arc striking structure. The arc striking structure comprises a static contact; one end, in contact with the static contact, of the run-on plate is provided with a connecting structure which is electrified with the static contact; the flash barrier is located above the connecting structure, the connecting structure has a deformation state in which the connecting structure is attached to the static contact after the flash barrier is pressed downwards, and the arc striking structure is used for overcoming the defect that in the prior art, the connecting strength between the inserting convex piece and the inserting hole is not high.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an arc striking structure. Background Art

[0002] The static contact of the electromagnetic tripping device in the circuit breaker is welded to the coil, and the static contact is formed with an arc-striking structure, which quickly guides the arc at the contact position into the arc extinguishing chamber. In the patent publication number CN219085918U, a static contact assembly of an electromagnetic tripping device and a circuit breaker are disclosed, which include a static contact and an arc-striking plate. The static contact has a plug-in tab and the arc-striking plate has a socket. During the connection process, the plug-in tab is inserted into the socket to complete the connection between the static contact and the arc-striking plate. However, the connection firmness of this connection method is general. When the circuit breaker is subjected to a violent impact or vibration, the plug-in tab will be separated from the socket, or the plug-in tab will be displaced, so that the plug-in tab and the socket cannot be in close contact, reducing the contact surface between the two. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low connection strength between the plug-in protrusion and the socket in the prior art, thereby providing an arc-striking structure that can effectively increase the contact surface between the static contact and the arc-striking plate.

[0004] To this end, the utility model provides an arc striking structure, including: a static contact; an arc striking plate, an end of which contacts the static contact and is provided with a connection structure that forms electricity with the static contact; an arc isolating plate, located above the connection structure, and the connection structure has a deformation state that fits with the static contact when the arc isolating plate is pressed down.

[0005] Further: the connecting structure includes a bent plate arranged on either side of the static contact or the arc striking plate, and a convex rib in contact with the bent plate is provided on the arc isolating plate, and the convex rib is interference fit with the bent plate. When the connecting structure is in a deformed state, the convex rib squeezes the bent plate so that the bent plate deforms toward the side facing away from the convex rib.

[0006] Further: the bending plate is located on the arc-striking plate, the arc-striking plate includes an arc-striking body and a connecting plate connected to the bending plate, the bending plate and the connecting plate form an "L"-shaped structure, the static contact includes a bending end in contact with the connecting plate and the bending plate, and a connecting end connected to the electromagnetic system, the bending plate is clamped on the upper end surface of the bending end, and the static contact has a static contact point, which is located on the side of the bending end facing away from the connecting plate.

[0007] Furthermore: the electromagnetic system also includes a moving contact in contact with the static contact, the arc isolation plate includes an upper partition and a lower partition, the upper partition and the lower partition are located on the upper and lower sides of the moving contact and the static contact, and are surrounded to form a space for separating the arc, and the rib is located at the upper partition.

[0008] Furthermore: a side of the upper partition that contacts the bending plate is provided with an avoidance groove for avoiding the bending plate, and the convex rib is provided in the avoidance groove and can conflict with the bending plate.

[0009] Furthermore: guiding slopes are provided on both sides of the avoidance groove for guiding the bent plate to be inserted into the avoidance groove.

[0010] Furthermore: a slot is formed between the arc striking body and the connecting plate for the bent end to be inserted into.

[0011] The technical solution of this utility model has the following advantages:

[0012] 1. The utility model provides an arc-striking structure. During the installation process, the static contact is first installed on the circuit breaker housing, and then the arc-striking plate is installed. The connection structure can be connected by plugging or snapping instead of welding. After the arc-striking plate and the static contact are installed, the arc-isolating plate is placed over the arc-striking plate and the static contact, so that the arc-isolating plate squeezes the connection structure, thereby tightly connecting the arc-striking plate and the static contact. This is superior to the existing technology, can eliminate the welding process, reduce the spot welding process and cost, and is easy to assemble and can form reliable electrical conduction.

[0013] 2. The utility model provides an arc-striking structure, in which a bent plate is arranged on the arc-striking plate, and a convex rib is arranged under the arc-isolating plate. When the arc-isolating plate covers the static contact and the arc-striking plate, the convex rib will squeeze the bent plate, causing the bent plate to deform downward, thereby making the bent plate more closely fit the surface of the bent end, increasing the contact area between the bent plate and the bent end, and achieving reliable conduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of some of the internal mechanisms of the circuit breaker;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 This is a schematic diagram of some of the internal mechanisms of the circuit breaker;

[0018] Figure 4 for Figure 3 Enlarged view of middle part B;

[0019] Figure 5 Schematic diagram of the structure of the upper partition;

[0020] Figure 6 A cross-sectional view of the circuit breaker structure.

[0021] Description of reference numerals:

[0022] 1. Static contact; 11. Bending end; 12. Connecting end; 13. Static contact; 2. Arc striking plate; 21. Arc striking body; 22. Connecting plate; 3. Arc isolating plate; 31. Raised rib; 32. Upper partition; 33. Lower partition; 4. Bending plate; 5. Electromagnetic system; 51. Moving contact; 6. Avoidance groove; 7. Guide slope; 8. Slot. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example

[0028] This embodiment provides an arc-striking structure, including: a static contact 1; an arc-striking plate 2, the end of which contacts the static contact 1 and is provided with a connection structure that forms electricity with the static contact 1; an arc-isolating plate 3, located above the connection structure, and the connection structure has a deformation state that fits with the static contact 1 when the arc-isolating plate 3 is pressed down.

[0029] The above specific improvements are: Figure 1 and Figure 2 As shown, compared with the existing technology, during the installation process, the static contact 1 is first installed on the housing of the circuit breaker, and then the arc-striking plate 2 is installed. The connection structure can be replaced by welding by plugging or snapping. After the arc-striking plate 2 and the static contact 1 are installed, the arc-isolating plate 3 is covered on top of the arc-striking plate 2 and the static contact 1, so that the arc-isolating plate 3 squeezes the connection structure, thereby making the arc-striking plate 2 and the static contact 1 tightly connected. This is superior to the existing technology, can save the welding process, reduce the spot welding process and cost, and is easy to assemble and can form reliable conduction.

[0030] On the basis of the above embodiment: the connecting structure includes a bent plate 4 arranged on either side of the static contact 1 or the arc striking plate 2, and a convex rib 31 in contact with the bent plate 4 is provided on the arc isolation plate 3, and the convex rib 31 is interference fit with the bent plate 4. When the connecting structure is in a deformed state, the convex rib 31 squeezes the bent plate 4 so that the bent plate 4 deforms toward the side facing away from the convex rib 31.

[0031] On the basis of the above embodiment: the bending plate 4 is located on the arc-striking plate 2, the arc-striking plate 2 includes an arc-striking body 21 and a connecting plate 22 connected to the bending plate 4, the bending plate 4 and the connecting plate 22 form an "L"-shaped structure, the static contact 1 includes a bending end 11 in contact with the connecting plate 22 and the bending plate 4, and a connecting end 12 connected to the electromagnetic system 5, the bending plate 4 is clamped on the upper end surface of the bending end 11, and the static contact 1 has a static contact 13, and the static contact 13 is located on the side of the bending end 11 facing away from the connecting plate 22.

[0032] On the basis of the above embodiment: the electromagnetic system 5 also includes a moving contact 51 in contact with the static contact 1, and the arc isolation plate 3 includes an upper partition 32 and a lower partition 33. The upper partition 32 and the lower partition 33 are located on the upper and lower sides of the moving contact 51 and the static contact 1, and are enclosed to form a space for separating the arc, and the rib 31 is located on the upper partition 32.

[0033] The above specific improvements are: Figures 1-4As shown, the bending plate 4 is arranged on the arc-striking plate 2, and a convex rib 31 is arranged under the arc-striking plate 3. When the arc-striking plate 3 covers the static contact 1 and the arc-striking plate 2, the convex rib 31 will squeeze the bending plate 4, causing the bending plate 4 to deform downward, so that the bending plate 4 is more in line with the surface of the bending end 11, increasing the contact area between the bending plate 4 and the bending end 11, and completing reliable conduction. The static contact 1 is provided with a static contact 13, which is used to contact the moving contact 51 to form power. When the static contact 1 and the static contact 1 are separated, an arc will be generated. The arc-striking plate 3 includes an upper partition 32 and a lower partition 33. The upper partition 32 and the lower partition 33 are respectively arranged at the upper and lower ends of the moving contact 51 and the static contact 1, which can not only guide the arc, but also the convex rib 31 on the upper partition 32 can squeeze the bending plate 4, thereby increasing the contact area between the bending plate 4 and the bending end 11.

[0034] On the basis of the above embodiment: the side of the upper partition 32 in contact with the bending plate 4 is provided with an avoidance groove 6 for avoiding the bending plate 4 , and the rib 31 is provided in the avoidance groove 6 and can interfere with the bending plate 4 .

[0035] The above specific improvements are: Figure 5 As shown, the side of the upper partition 32 that contacts the bending plate 4 has an avoidance groove 6, which is used to make way for the bending plate 4 so that the upper partition 32 can be covered on the top of the bending plate 4.

[0036] On the basis of the above embodiment: guiding inclined surfaces 7 for guiding the bending plate 4 to be clamped into the avoidance groove 6 are further provided on both sides of the avoidance groove 6 .

[0037] The above specific improvements are: Figure 5 and Figure 6 As shown, by providing the guiding inclined surface 7 , the bent plate 4 can be effectively guided to be inserted into the avoiding groove 6 .

[0038] On the basis of the above embodiment: a slot 8 for the bent end 11 to be inserted into is formed between the arc striking body 21 and the connecting plate 22 .

[0039] The above specific improvements are: Figure 2 and Figure 4 As shown, by setting the slot 8, the bent end 11 can be stuck into the slot 8, increasing the contact area between the bent end 11 and the connecting plate 22, thereby making the connection between the static contact 1 and the arc striking plate 2 tighter.

[0040] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An arc striking structure, characterized in that: include: Stationary contact (1); An arc striking plate (2) having one end in contact with the stationary contact (1) provided with a connection structure for forming an electrical connection with the stationary contact (1); The arc isolation plate (3) is located above the connection structure, and the connection structure has a deformation state in which the arc isolation plate (3) is pressed downward and fits with the static contact (1).

2. An arc striking structure according to claim 1, characterized in that: The connection structure comprises a bent plate (4) arranged on either the stationary contact (1) or the arc striking plate (2); a convex rib (31) in contact with the bent plate (4) is arranged on the arc isolating plate (3); the convex rib (31) and the bent plate (4) are interference fit; when the connection structure is in a deformed state, the convex rib (31) presses the bent plate (4) so ​​that the bent plate (4) is deformed toward a side facing away from the convex rib (31).

3. An arc striking structure according to claim 2, characterized in that: The bending plate (4) is located on the arc-striking plate (2), the arc-striking plate (2) comprises an arc-striking body (21) and a connecting plate (22) connected to the bending plate (4), the bending plate (4) and the connecting plate (22) form an "L"-shaped structure, the static contact (1) comprises a bending end (11) in contact with the connecting plate (22) and the bending plate (4), and a connecting end (12) connected to the electromagnetic system (5), the bending plate (4) is clamped on the upper end surface of the bending end (11), and the static contact (13) is provided on the static contact (13), and the static contact (13) is located on the side of the bending end (11) facing away from the connecting plate (22).

4. An arc striking structure according to claim 3, characterized in that: The electromagnetic system (5) also includes a moving contact (51) in contact with the stationary contact (1); the arc isolation plate (3) includes an upper partition (32) and a lower partition (33); the upper partition (32) and the lower partition (33) are located on the upper and lower sides of the moving contact (51) and the stationary contact (1), and are arranged to form a space for separating the arcs; the convex rib (31) is located on the upper partition (32).

5. An arc striking structure according to claim 4, characterized in that: A side of the upper partition plate (32) in contact with the bending plate (4) is provided with an avoidance groove (6) for avoiding the bending plate (4), and the convex rib (31) is arranged in the avoidance groove (6) and can abut against the bending plate (4).

6. An arc striking structure according to claim 5, characterized in that: Guide slopes (7) for guiding the bending plate (4) to be inserted into the avoidance groove (6) are also provided on both sides of the avoidance groove (6).

7. An arc striking structure according to claim 3, characterized in that: A slot (8) for the bent end (11) to be inserted into is formed between the arc striking body (21) and the connecting plate (22).

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