Clamping type contact system

Abstract

A clamping type contact system comprises a moving contact assembly and a static contact, the static contact is provided with a static contact main contact part and a static contact second breakdown part, and the moving contact assembly is provided with a moving contact assembly main contact part and a moving contact second breakdown part at positions corresponding to the static contact main contact part and the static contact second breakdown part. In the process that the moving contact assembly rotates to leave the static contact, the moving contact assembly main contact part and the static contact main contact part are separated first, and then along with rotation of the moving contact assembly, the distance between the moving contact assembly main contact part and the static contact main contact part becomes larger and larger. And the distance between the second breakdown part of the moving contact and the second breakdown part of the static contact becomes smaller and smaller. According to the moving contact system, the second breakdown points are arranged on the moving contact and the static contact, so that the electric arc is quickly led out from the main contact part, the ablation of the moving contact and the static contact is reduced, and the electrical service life of the switch is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, and specifically relates to a clamping contact system. Background Art

[0002] At present, the contact system structures commonly used in switchgear can be divided into two types: snap-on type and clamp-on type. The snap-on type contact system has a long electrical life, but the product cost is also high, and its short-term withstand characteristics are not good; while the clamp-on type contact system is just the opposite, with good short-term withstand characteristics and low cost, but a short electrical life, generally not as good as the snap-on type contact system. Utility Model Content

[0003] The purpose of the utility model is to provide a clamping contact system to address the defects of the above-mentioned existing clamping contact system, such as short electrical life and high cost of adding arc-starting plates. A second breakdown point is set on the moving and static contacts to quickly lead the arc out of the main contact part to reduce the ablation of the moving and static contacts, thereby increasing the electrical life of the switch.

[0004] Technical Solution

[0005] In order to achieve the above technical objectives, the utility model provides a clamping contact system, which includes a moving contact assembly and a static contact, wherein the engagement and separation of the moving contact assembly with the static contact during rotation controls the on and off of the switch, and is characterized in that: a static contact main contact portion and a static contact second breakdown portion are arranged on the static contact, and a moving contact assembly main contact portion and a moving contact second breakdown portion are arranged at positions corresponding to the static contact main contact portion and the static contact second breakdown portion on the moving contact assembly, and in the process of the moving contact assembly rotating away from the static contact, the moving contact assembly main contact portion and the static contact main contact portion are separated first, and then as the moving contact assembly rotates, the distance between the moving contact assembly main contact portion and the static contact main contact portion becomes larger and larger, and the distance between the moving contact second breakdown portion and the static contact second breakdown portion becomes smaller and smaller.

[0006] In one embodiment, the second breakdown portion of the stationary contact is far away from the main contact portion of the stationary contact, and the second breakdown portion of the stationary contact is integrated with the main contact portion of the stationary contact.

[0007] In one embodiment, the second breakdown portion of the moving contact is provided at an end of the moving contact assembly.

[0008] In one embodiment, the second breakdown portion of the moving contact is arranged at an end of the moving contact piece and / or an end of the moving contact support member.

[0009] In one embodiment, the stationary contact comprises a first step surface and a second step surface, the second step surface is lower than the first step surface, and the second breakdown portion of the stationary contact is located at an edge of the first step surface connected to the second step surface.

[0010] In one embodiment, the static contact and the wiring terminal at the load end are connected by bolts, welding or riveting.

[0011] In one embodiment, the moving contact assembly includes a moving contact piece, a moving contact support, a leaf spring and a rotating shaft. The moving contact piece, the moving contact support and the leaf spring are installed in a mounting hole in the rotating shaft. The moving contact support is located on the outside of the moving contact piece and extends toward the end of the moving contact piece. The leaf spring is located on the outside of the moving contact support and presses against the moving contact support.

[0012] Beneficial Effects

[0013] The utility model provides a clamping contact system, which includes a moving contact assembly and a stationary contact. The engagement and separation of the moving contact assembly with the stationary contact during the rotation process controls the on and off of the circuit breaker. The stationary contact is provided with a stationary contact main contact portion and a stationary contact second breakdown portion. The moving contact assembly is provided with a moving contact assembly main contact portion and a moving contact second breakdown portion at positions corresponding to the stationary contact main contact portion and the stationary contact second breakdown portion. During the process of the moving contact assembly rotating away from the stationary contact, the moving contact assembly main contact portion and the stationary contact main contact portion are first separated, and then as the moving contact assembly rotates, the distance between the moving contact assembly main contact portion and the stationary contact main contact portion becomes larger and larger, and the distance between the moving contact second breakdown portion and the stationary contact second breakdown portion becomes smaller and smaller. The moving contact system is provided with a second breakdown point on both the moving contact and the stationary contact, and the arc is quickly led out from the main contact portion to reduce the ablation of the moving and stationary contacts, thereby improving the electrical life of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] Attached Figure 1 It is a schematic diagram of the engagement state of the moving contact assembly and the stationary contact in the embodiment of the utility model;

[0016] Attached Figure 2 It is a schematic diagram of the separation state of the moving contact assembly and the stationary contact in the embodiment of the utility model;

[0017] Attached Figure 3 It is a schematic diagram of the movable contact assembly and the stationary contact in the second breakdown point position in the embodiment of the utility model;

[0018] Attached Figure 4This is an exploded schematic diagram of a moving contact assembly in an embodiment of the utility model;

[0019] Attached Figure 5 This is a schematic diagram of the connection between the static contact and the wiring terminal in the embodiment of the utility model;

[0020] Attached Figure 6 It is an exploded schematic diagram of the stationary contact and the wiring terminal in the embodiment of the utility model; DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0026] Example

[0027] The existing clamping contact system has a short electrical life and the cost of adding an arc-starting plate is high. In order to solve this problem, this embodiment provides a clamping contact system, as shown in the attached Figure 1 , 2 and 3, it includes a moving contact assembly 1 and a stationary contact 2, the moving contact assembly 1 and the stationary contact 2 are installed in the circuit breaker housing m, and the engagement and separation of the moving contact assembly 1 with the stationary contact 2 during the rotation process controls the on and off of the switch, as shown in the attached Figure 4 As shown, the moving contact assembly 1 includes a moving contact piece 1a, a moving contact support 1b, a leaf spring 1c and a rotating shaft 1d. The moving contact piece 1a, the moving contact support 1b and the leaf spring 1c are installed in the mounting hole 1d01 in the rotating shaft 1d. The moving contact support 1b is located outside the moving contact piece 1a and extends to the end of the moving contact piece 1a. The leaf spring 1c is located outside the moving contact support 1b and presses against the moving contact support 1b. Figure 5 and 6 As shown, the static contact 2 and the terminal 3 at the load end are connected by bolts, welding or riveting. The static contact 2 is provided with a static contact main contact portion 201 and a static contact second breakdown portion 202, and the dynamic contact assembly 1 is provided with a dynamic contact assembly main contact portion 101 and a dynamic contact second breakdown portion 102 at positions corresponding to the static contact main contact portion 201 and the static contact second breakdown portion 202. Specifically, in this embodiment, the static contact second breakdown portion 202 is away from the static contact main contact portion 201, and the static contact second breakdown portion 202 is integrated with the static contact main contact portion 201.

[0028] As attached Figure 4 As shown, the second breakdown portion 102 of the moving contact is arranged at the end of the moving contact assembly 1. The second breakdown portion 102 of the moving contact is arranged at the end of the moving contact piece 1a and the end of the moving contact support 1b. The second breakdown portion 102 of the moving contact can be an inclined surface 102' or a sharp angle 102". The second breakdown portion 102 of the moving contact can also be arranged at the end of the moving contact piece 1a or the end of the moving contact support 1b. In this embodiment, as shown in the attached Figure 4As shown, the second breakdown portion 102 of the contact at the end of the moving contact support 1b is a sharp angle, and the second breakdown portion 102 of the contact at the end of the moving contact piece 1a is an inclined surface, but it does not mean that the second breakdown portion 102 of the contact at the end of the moving contact support 1b must be a sharp angle, and the second breakdown portion 102 of the contact at the end of the moving contact piece 1a must be an inclined surface.

[0029] Furthermore, the stationary contact 2 comprises a first step surface 2a and a second step surface 2b, the second step surface 2b is lower than the first step surface 2a, and the second breakdown portion 202 of the stationary contact is located at the edge of the first step surface 2a connected to the second step surface 2b.

[0030] In this embodiment, during the process of the moving contact assembly 1 rotating away from the static contact 2, the main contact portion 101 of the moving contact assembly and the main contact portion 201 of the static contact are first separated, and then as the moving contact assembly 1 rotates, the distance between the main contact portion 101 of the moving contact assembly and the main contact portion 201 of the static contact becomes larger and larger, and the distance between the second breakdown portion 102 of the moving contact and the second breakdown portion 202 of the static contact becomes smaller and smaller.

[0031] The utility model is mainly used in various switch electrical appliances, especially in occasions with high requirements for short-term durability and electrical life. In order to improve the electrical life of the clamping contact system, the utility model is provided with a second breakdown point on the moving and static contacts, and the second breakdown point is located away from the main contact part of the moving and static contacts. In the process of opening the moving and static contacts, the main contact part is separated and arcs are drawn first. As the moving contact rotates, the distance between the moving and static main contact parts becomes larger and larger, while the distance between the parts provided with the second breakdown point becomes smaller and smaller, so that the arc can be quickly transferred from the main contact part to the second breakdown point part, so as to protect the moving and static contacts and improve the electrical life of the switch.

[0032] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0033] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A clamping contact system, comprising a moving contact assembly (1) and a stationary contact (2), wherein the engagement and separation of the moving contact assembly (1) with the stationary contact (2) during rotation controls the on and off of a switch, characterized in that: The stationary contact (2) is provided with a stationary contact main contact portion (201) and a stationary contact second breakdown portion (202); the moving contact assembly (1) is provided with a moving contact assembly main contact portion (101) and a moving contact second breakdown portion (102) at positions corresponding to the stationary contact main contact portion (201) and the stationary contact second breakdown portion (202); when the moving contact assembly (1) rotates away from the stationary contact (2), the moving contact assembly main contact portion (101) and the stationary contact main contact portion (201) are first separated, and then as the moving contact assembly (1) rotates, the distance between the moving contact assembly main contact portion (101) and the stationary contact main contact portion (201) increases, and the distance between the moving contact second breakdown portion (102) and the stationary contact second breakdown portion (202) decreases.

2. A clamping contact system according to claim 1, characterized in that: The second breakdown portion (202) of the stationary contact is far away from the main contact portion (201) of the stationary contact, and the second breakdown portion (202) of the stationary contact is integrated with the main contact portion (201) of the stationary contact.

3. A clamping contact system according to claim 1, characterized in that: The second breakdown portion (102) of the moving contact is arranged at the end of the moving contact assembly (1).

4. A clamping contact system as claimed in claim 3, characterized in that: The second breakdown portion (102) of the moving contact is arranged at the end of the moving contact piece (1a) and / or the end of the moving contact support (1b).

5. A clamping contact system as claimed in claim 1, characterized in that: The stationary contact (2) comprises a first step surface (2a) and a second step surface (2b), the second step surface (2b) being lower than the first step surface (2a), and the second breakdown portion (202) of the stationary contact is located at an edge of the first step surface (2a) connected to the second step surface (2b).

6. A clamping contact system according to claim 1, characterized in that: The static contact (2) and the wiring terminal (3) at the load end are connected by bolts, welding or riveting.

7. A clamping contact system as claimed in claim 1, characterized in that: The moving contact assembly (1) comprises a moving contact piece (1a), a moving contact support (1b), a leaf spring (1c) and a rotating shaft (1d); the moving contact piece (1a), the moving contact support (1b) and the leaf spring (1c) are installed in a mounting hole (1d01) in the rotating shaft (1d); the moving contact support (1b) is located outside the moving contact piece (1a) and extends toward the end of the moving contact piece (1a); the leaf spring (1c) is located outside the moving contact support (1b) and presses against the moving contact support (1b).

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