Moving contact system of frame switch

Abstract

The utility model discloses a moving contact system of a frame switch, which comprises an arc contact and main contacts, the main contacts are arranged on two sides of the arc contact side by side, one end of a contact spring group abuts against the inner side surface of the moving contact system, and the other end of the contact spring group is arranged in a contact spring mounting groove on a contact support. And the bottom surface I of a spring seat for mounting an arc contact spring on the arc contact is higher than the arc inner side surface of the arc contact. Firstly, by changing the position of the contact spring, the stress of the arc contact can be reduced, and the arc contact is prevented from being broken due to too long length. And meanwhile, the stress part of the heavy arc contact of the moving contact system is reinforced.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a moving contact system for a frame switch. Background Technology

[0002] In the current low-voltage electrical appliance field, traditionally, DC 1500V products typically use 4-pole (4P) switches. However, 4P switches are bulky and costly. To reduce costs, 2P / DC 1500V and 2P / DC 2000V products have emerged on the market. However, these 2P / DC 1500V and 2P / DC 2000V products require each pole to withstand a higher voltage. This leads to insulation failure when extinguishing the arc on each individual pole of the 2P product due to excessively high voltage division. In existing technology, the contacts of frame switches can be fully parallel multi-piece contacts or a set of main arc contacts, used for arc extinguishing. In DC products, a separate arc contact is needed to form a narrow slit to meet the critical load current requirements. Therefore, in 2P / DC 1500V frame-type disconnect switches, the moving contact more often uses the form of a main arc contact. Figure 1 As shown, the main contact has a main contact point, and the arc contact has both a main contact point and an arc contact point. The main contacts and arc contacts are generally arranged in an array with the same gap. However, when this type of moving contact is used in high-voltage products, the arc contact point is often too long and prone to breakage. Utility Model Content

[0003] This invention addresses the shortcomings of existing frame switches where the moving contact is too long and prone to breakage when used in high-voltage products. It provides a moving contact system for frame switches by strengthening the arc contact of the moving contact and changing the position of the contact spring, thereby reducing the force on the arc contact and preventing it from breaking due to excessive length.

[0004] Technical solution

[0005] To achieve the above-mentioned technical objectives, this utility model provides a moving contact system for a frame switch, which includes an arc contact and a main contact. The main contacts are arranged side by side on both sides of the arc contact. One end of the contact spring assembly abuts against the inner side of the moving contact system, and the other end is placed in the contact spring mounting groove on the contact support. The feature is that the bottom surface of the spring seat on the arc contact for mounting the arc contact spring is higher than the inner surface of the arc of the arc contact.

[0006] In one embodiment, the bottom surface of the spring seat on the main contact for mounting the main contact spring is lower than the main inner surface of the main contact.

[0007] In one embodiment, two spring seats are arranged on the side of the arc contact corresponding to the contact spring assembly, and a reinforcing part is provided between the two spring seats.

[0008] In one embodiment, the reinforcement is a protrusion on the arc contact.

[0009] In one embodiment, the direction in which the reinforcing portion extends from the arc contact is consistent with the length direction of the contact spring assembly.

[0010] In one embodiment, the contact spring assembly includes a main contact spring that abuts against the main contact and an arc contact spring that abuts against the arc contact. The depth of the first contact spring mounting groove on the contact support is greater than the depth of the second contact spring mounting groove on the contact support on the other end of the main contact spring.

[0011] In one embodiment, the end face of the first contact spring mounting groove on the contact support for placing the arc contact spring is lower than the end face of the second contact spring mounting groove for placing the main contact spring.

[0012] Beneficial effects

[0013] This utility model provides a moving contact system for a frame switch, comprising an arc contact and main contacts. The main contacts are arranged side-by-side on both sides of the arc contact. One end of a contact spring assembly abuts against the inner side of the moving contact system, and the other end is placed in a contact spring mounting groove on a contact support. The bottom surface of the spring seat on the arc contact for mounting the arc contact spring is higher than the inner surface of the arc of the arc contact. Firstly, by changing the position of the contact spring, the force on the arc contact can be reduced, preventing the arc contact from breaking due to excessive length. Simultaneously, the stress-bearing parts of the moving contact system, particularly the arc contact, are reinforced. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Appendix Figure 1 This is a schematic diagram of a moving contact in the prior art;

[0016] Appendix Figure 2 This is a schematic diagram of the moving contact in an embodiment of this utility model;

[0017] Appendix Figure 3 This is a three-dimensional schematic diagram of the arc contact in an embodiment of this utility model;

[0018] Appendix Figure 4 This is a schematic diagram of the arc contact in an embodiment of this utility model;

[0019] Appendix Figure 5 This is a three-dimensional schematic diagram of the arc contact in an embodiment of this utility model;

[0020] Appendix Figure 6 This is a schematic diagram of the arc contact in an embodiment of this utility model;

[0021] Appendix Figure 7 This is a perspective view of the contact spring assembly installed in the contact support in an embodiment of this utility model;

[0022] Appendix Figure 8 This is a schematic diagram of the contact support in an embodiment of this utility model; Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0028] Example

[0029] In existing technologies, the contacts of frame switches can be multiple parallel contacts or a set of main arc contacts, used for arc extinguishing. In DC products, a separate arc contact is required to form a narrow slit to meet the critical load current requirements; that is, in 2P / DC 1500V frame-type disconnect switches, the moving contact more often uses the form of a main arc contact. For example... Figure 1 As shown, the main contact has a main contact point, and the arc contact has both a main contact point and an arc contact point. The main contacts and arc contacts are generally arranged in an array with the same gap. However, when this type of moving contact is used in high-voltage products, the arc contact point is often too long and prone to breakage.

[0030] To solve this problem, see attached... Figure 2 As shown, this embodiment provides a moving contact system for a frame switch, which includes a moving contact a, which comprises an arc contact 1 and a main contact 2. The main contacts 2 are arranged side by side on both sides of the arc contact 1, as shown in the attached figure. Figure 3 and 4 As shown, the arc contact 1 is provided with an arc main contact 102 and an arc contact 103, as illustrated in the attached diagram. Figure 7 As shown, one end of the contact spring assembly 3 abuts against the inner side of the moving contact a, and the other end is placed as shown in the attached figure. Figure 8In the contact spring mounting groove 4a on the contact support 4 shown, a reinforcing part 101 is arranged on the arc contact 1. Specifically, two spring seats 104 and 104' are arranged on the side of the arc contact 1 corresponding to the contact spring assembly 3, and the reinforcing part 101 is provided between the two spring seats 104 and 104'. The reinforcing part 101 is a protrusion on the arc contact 1. The direction in which the reinforcing part 101 extends from the arc contact 1 is consistent with the length direction of the contact spring assembly 3. In detail, as shown in the attached figure... Figure 3 As shown, the reinforcing part 101 is arranged on one side of the arc contact 1 that contacts the contact spring assembly 3. The reinforcing part 101 is arranged in the area of ​​the arc contact 1 that contacts the contact spring assembly 3.

[0031] As attached Figure 7 As shown, the contact spring assembly 3 includes a main contact spring 302 that abuts against the main contact 2, and an arc contact spring 301 that abuts against the arc contact 1. The other end of the arc contact spring 301 is placed in a contact spring mounting groove 4a01 on the contact support 4, which is deeper than the other end of the main contact spring 302. That is, the bottom surface of the first contact spring mounting groove 4a01 is further away from the moving contact a than the bottom surface of the second contact spring mounting groove 4a02. The bottom surface 5 of the spring seat on the arc contact 1 for mounting the arc contact spring 301 is higher than the inner arc surface 7 of the arc contact 1. (See attached diagram) Figure 4 and 5 As shown, the bottom surface 6 of the spring seat on the main contact 2 for mounting the main contact spring 302 is lower than the main inner surface 8 of the main contact 2. The end face of the contact spring mounting groove 4a01 on the contact support 4 for placing the arc contact spring 301 is lower than the end face of the contact spring mounting groove 4a02 for placing the main contact spring 302, that is, the end face of the contact spring mounting groove 4a01 is further away from the moving contact a than the end face of the contact spring mounting groove 4a02.

[0032] This utility model provides a moving contact system for a frame switch, comprising an arc contact 1 and a main contact 2. The main contacts 2 are arranged side by side on both sides of the arc contact 1. One end of a contact spring assembly 3 abuts against the inner side of the moving contact system, and the other end is placed in a contact spring mounting groove 4a on a contact support 4. The bottom surface 5 of the spring seat on the arc contact 1 for mounting the arc contact spring 301 is higher than the inner surface 7 of the arc of the arc contact 1. Firstly, by strengthening the arc contact of the moving contact, and simultaneously changing the position of the contact spring, the depth of the contact spring mounting groove 301 is increased, resulting in a smaller deformation of the arc contact spring and a smaller spring force. Therefore, the force on the arc contact is reduced, lowering the possibility of arc contact breakage.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A moving contact system for a frame switch, comprising an arc contact (1) and a main contact (2), wherein the main contacts (2) are arranged side by side on both sides of the arc contact (1), and one end of a contact spring assembly (3) abuts against the inner side of the moving contact system, and the other end is placed in a contact spring mounting groove (4a) on a contact support (4), characterized in that: The bottom surface (5) of the spring seat on the arc contact (1) for mounting the arc contact spring (301) is higher than the inner surface (7) of the arc of the arc contact (1).

2. The moving contact system of a frame switch as described in claim 1, characterized in that: The bottom surface (6) of the spring seat on the main contact (2) for mounting the main contact spring (302) is lower than the main inner surface (8) of the main contact (2).

3. The moving contact system of a frame switch as described in claim 1, characterized in that: Two spring seats (104, 104') are arranged on the side of the arc contact (1) that is in contact with the contact spring assembly (3), and a reinforcing part (101) is provided between the two spring seats (104, 104').

4. The moving contact system of a frame switch as described in claim 3, characterized in that: The reinforcing part (101) is a protrusion on the arc contact (1).

5. The moving contact system of a frame switch as described in claim 3, characterized in that: The direction in which the reinforcing part (101) extends from the arc contact (1) is consistent with the length direction of the contact spring assembly (3).

6. The moving contact system of a frame switch as described in claim 1, characterized in that: The contact spring assembly (3) includes a main contact spring (302) that abuts against the main contact (2) and an arc contact spring (301) that abuts against the arc contact (1). The other end of the arc contact spring (301) is placed in the contact spring mounting groove one (4a01) on the contact support (4), which is deeper than the other end of the main contact spring (302) is placed in the contact spring mounting groove two (4a02) on the contact support (4).

7. The moving contact system of a frame switch as described in claim 1, characterized in that: The end face of the first contact spring mounting groove (4a01) on the contact support (4) for placing the arc contact spring (301) is lower than the end face of the second contact spring mounting groove (4a02) for placing the main contact spring (302).

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