Contact mechanism for a double contact circuit breaker

Abstract

A contact mechanism of double-contact circuit breaker. Mainly solve the current double-contact circuit breaker using two dynamic contact pieces to set two dynamic contacts to realize breaking, the problem of low synchronization rate. Its characterized in that: the static contact piece includes the main piece, the main piece is provided with the first piece and the second piece integrally manufactured, the static contact point includes the first static contact point arranged on the first piece and the second static contact point arranged on the second piece; the dynamic contact piece includes the piece body, the dynamic contact point includes the first dynamic contact point and the second dynamic contact point arranged on the piece body, the first dynamic contact point and the second dynamic contact point are provided with the gap groove, the first dynamic contact point is arranged opposite to the first static contact point, and the second dynamic contact point is arranged opposite to the second static contact point. The utility model provides a kind of contact mechanism of double-contact circuit breaker, and two dynamic contacts are set on one dynamic contact piece, and the synchronization rate is high, and two static contacts are arranged oppositely, two arcs are generated when breaking, and the energy of single arc is reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a contact mechanism of a double-contact circuit breaker. Background Technology

[0002] As shown in the Chinese patent with authorization announcement number CN 115763180 B, the current double-contact circuit breaker uses two moving contacts on two moving contact pieces to achieve disconnection. This structure, which sets the double contacts on two moving contact pieces, has a low synchronization rate and poor performance. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a contact mechanism for a double-contact circuit breaker, which mainly solves the problem that the current double-contact circuit breakers use two moving contacts on two moving contact pieces to achieve breaking and have a low synchronization rate.

[0004] The technical solution of this utility model is as follows:

[0005] A contact mechanism for a dual-contact circuit breaker includes a stationary contact piece and a moving contact piece. The stationary contact piece has a stationary contact point, and the moving contact piece has a moving contact point. The stationary contact piece includes a main piece, and the main piece has an integrally formed first segment and a second segment. The stationary contact point includes a first stationary contact point disposed on the first segment and a second stationary contact point disposed on the second segment.

[0006] The movable contact includes a sheet body, and the movable contact includes a first movable contact and a second movable contact disposed on the sheet body. A gap groove is provided between the first movable contact and the second movable contact. The first movable contact is disposed opposite to the first stationary contact, and the second movable contact is disposed opposite to the second stationary contact.

[0007] A partition groove is provided between the first segment and the second segment, and the partition groove is arranged opposite to the gap groove.

[0008] Part of the first moving contact is located on the side of the moving contact piece.

[0009] The plate body is provided with a shaft hole for rotatable mounting of the bracket.

[0010] The partition groove includes a narrower first groove and a wider second groove, the first groove is connected to the second groove, and the first groove is disposed opposite to the gap groove.

[0011] The first and second segments are symmetrically arranged.

[0012] The main piece and the first sub-piece are bent together to form a single piece.

[0013] The beneficial effects of this utility model are: This utility model provides a contact mechanism for a double-contact circuit breaker, which uses two moving contacts on a moving contact piece to move, resulting in a high synchronization rate. In addition, two stationary contacts are arranged opposite each other, generating two electric arcs when the circuit is broken, thus reducing the energy of a single electric arc. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a static contact piece according to an embodiment of the present invention.

[0015] Figure 2 This is a three-dimensional schematic diagram of the moving contact piece according to an embodiment of the present invention.

[0016] Figure 3 This is a partial perspective view of the installation of the device on the circuit breaker mechanism according to an embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. A contact mechanism of a dual-contact circuit breaker includes a stationary contact piece 1 and a moving contact piece 2. The stationary contact piece is provided with a stationary contact 11, and the moving contact piece is provided with a moving contact 21. The stationary contact piece includes a main piece 10, on which a first segment 12 and a second segment 13 integrally formed are provided. The stationary contact includes a first stationary contact 111 provided on the first segment and a second stationary contact 112 provided on the second segment. The moving contact piece includes a piece body 20, on which a first moving contact 201 and a second moving contact 202 are provided. A gap groove 203 is provided between the first moving contact and the second moving contact. The first moving contact is disposed opposite to the first stationary contact, and the second moving contact is disposed opposite to the second stationary contact. The moving contact has two contacts, which improves the synchronization when the moving contact rotates. The two-contact contact mechanism of this application is particularly suitable for parallel double-contact circuit breakers. Its main piece can be connected to the coil of the trip unit, and the two stationary contacts are separated and set on two separate pieces. When the circuit is broken, the electric arc generated will also be divided into two, reducing the energy of a single electric arc and making it easier to extinguish.

[0018] In this embodiment, as shown in the figure, a partition groove 14 is provided between the first segment and the second segment, and the partition groove is arranged opposite to the gap groove. This facilitates arc separation.

[0019] In this embodiment, as shown in the figure, a portion of the first moving contact is located on the side of the moving contact piece. Two moving contacts are located on the two sides of the moving contact piece, making good use of the thickness of the moving contact piece, and a gap is formed between the two moving contacts.

[0020] In this embodiment, as shown in the figure, the sheet body is provided with a shaft hole 204 for rotatable mounting of the bracket 9. Mounting is achieved by simply providing a rotating shaft on the bracket, which is existing technology and will not be described further.

[0021] In this embodiment, as shown in the figure, the partition groove includes a narrower first groove 141 and a wider second groove 142. The first groove is connected to the second groove, and the first groove is disposed opposite to the gap groove. The first segment and the second segment will move away from each other during the extension process, so the groove between them will also become larger. The arc will also move away during the elongation process, which is more conducive to arc extinguishing. The second groove is located below the first groove.

[0022] In this embodiment, as shown in the figure, the first and second segments are symmetrically arranged, resulting in a more compact structure.

[0023] In this embodiment, as shown in the figure, the main piece and the first segment are integrally bent to form the structure. This facilitates manufacturing.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A contact mechanism for a double-contact circuit breaker, comprising a stationary contact piece (1) and a moving contact piece (2), wherein the stationary contact piece is provided with a stationary contact (11) and the moving contact piece is provided with a moving contact (21), characterized in that: The stationary contact includes a main piece (10), on which a first sub-piece (12) and a second sub-piece (13) are integrally formed. The stationary contact includes a first stationary contact (111) on the first sub-piece and a second stationary contact (112) on the second sub-piece. The movable contact includes a sheet body (20), and the movable contact includes a first movable contact (201) and a second movable contact (202) disposed on the sheet body. A gap groove (203) is provided between the first movable contact and the second movable contact. The first movable contact is disposed opposite to the first stationary contact, and the second movable contact is disposed opposite to the second stationary contact.

2. The contact mechanism of a double-contact circuit breaker according to claim 1, characterized in that: A partition groove (14) is provided between the first segment and the second segment, and the partition groove is arranged opposite to the gap groove.

3. The contact mechanism of a double-contact circuit breaker according to claim 1, characterized in that: Part of the first moving contact is located on the side of the moving contact piece.

4. The contact mechanism of a double-contact circuit breaker according to claim 1, characterized in that: The sheet body is provided with a shaft hole (204) for rotatable mounting of the bracket (9).

5. The contact mechanism of a double-contact circuit breaker according to claim 2, characterized in that: The partition groove includes a narrower first groove (141) and a wider second groove (142), the first groove is connected to the second groove, and the first groove is disposed opposite to the gap groove.

6. The contact mechanism of a double-contact circuit breaker according to any one of claims 1-5, characterized in that: The first and second segments are symmetrically arranged.

7. The contact mechanism of a double-contact circuit breaker according to any one of claims 1-5, characterized in that: The main piece and the first sub-piece are bent together to form a single piece.

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