Contact system of isolating switch

Abstract

The utility model relates to a contact system of an isolating switch, which comprises a moving contact, a static contact and a wiring board, the wiring board is connected with the moving contact, the static contact is arranged in front of the moving contact, the moving contact rotates between a closing position and a breaking position, a contact part is formed on the static contact towards the moving contact, the contact part is bent upwards to form a J shape, and the moving contact is arranged on the wiring board. According to the utility model, the contact part which is bent upwards to be J-shaped is connected with the moving contact, and repulsive force can be generated when large current passes through, so that the overcurrent breaking capacity of the moving contact is improved.

Description

Technical Field

[0001] The utility model relates to a component of a disconnector, in particular to a contact system of a disconnector. Background Art

[0002] A disconnector is a switching device that plays an isolating role in a circuit. The contact system of the disconnector consists of a moving contact and a static contact. For example, the current switching device disclosed in publication number: CN 104335309 A is a contact system for a disconnector, which is realized by a movable contact and a static contact. The movable contact includes a first contact piece and a second contact piece, and the static contact includes a contact part to be connected to the movable contact. The movable contact and the static contact of this structure will not generate repulsive force when encountering large current, cannot accelerate the breaking of the contact, and have poor breaking ability. Summary of the Invention

[0003] Aiming at the above deficiencies, the utility model provides a contact system of a disconnector, which has the advantages of strong breaking ability and simple structure.

[0004] To achieve the above purpose, the utility model adopts a contact system of a disconnector, which includes a moving contact, a static contact, and a wiring board. The wiring board is connected to the moving contact, the static contact is arranged in front of the moving contact, and the moving contact rotates between a closed position and a breaking position. A contact part is formed on the static contact facing the moving contact, and the contact part bends upward in a J shape and is connected to the moving contact when the moving contact is in the closed position.

[0005] The utility model is further arranged such that the moving contact includes moving contact side plates, a moving contact clamping plate, and a spring piece. Two moving contact side plates are arranged opposite to each other, and a relatively protruding partition block is formed between the two moving contact side plates. A gap is formed between the two relatively arranged moving contact side plates through the mutual support of the partition blocks. The spring piece is arranged outside one of the moving contact side plates, and the moving contact clamping plate is connected to the outside of the other moving contact side plate and the outside of the spring piece, and the moving contact clamping plate clamps the spring piece on the moving contact side plate.

[0006] The utility model is further arranged such that a copper braid is arranged between the wiring board and the moving contact, and the wiring board is connected to the moving contact through the copper braid.

[0007] The utility model is further arranged such that the moving contact further includes a moving contact pressure plate, and the moving contact pressure plate is arranged between the spring piece and the moving contact side plate.

[0008] The utility model is further arranged such that the contact system further includes a housing and a rotating shaft. The moving contact is arranged in the rotating shaft, and both ends of the rotating shaft are connected to rotate in the housing. The wiring board and the static contact are respectively clamped on the housing, and the outer ends of the wiring board and the static contact are exposed outside the housing.

[0009] The present utility model is further configured such that an arc extinguishing cover is provided on one side of the static contact towards the breaking position of the moving contact.

[0010] The beneficial effects of the present utility model are as follows: The contact part that is bent upward in a J shape is used to connect with the moving contact, and when passing through a large current, a repulsive force can be generated to improve the over-current breaking ability of the moving contact; the moving contact is connected to the wiring board through a flexible connection. Compared with a rigid connection, the friction is smaller when the moving contact rotates, and the service life is long; the moving contact provides pressure through a spring piece to ensure the contact performance with the static contact, and the structure is simple and reliable, and the assembly is convenient; the contact system is assembled modularly with a housing and can be assembled and used when connecting multiple circuits. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of a specific embodiment of the present utility model with one side of the housing removed.

[0012] Figure 2 It is a front view of a specific embodiment of the present utility model with one side of the housing removed.

[0013] Figure 3 It is a schematic diagram of the moving contact in a specific embodiment of the present utility model.

[0014] Figure 4 It is a top view of the moving contact in a specific embodiment of the present utility model.

[0015] Figure 5 It is a schematic diagram of the static contact in a specific embodiment of the present utility model. Detailed Description of the Embodiment

[0016] As Figures 1 to 5 shown, a specific embodiment of the present utility model is a contact system of a disconnecting switch, which includes a moving contact 1, a static contact 2, a wiring board 3, an arc extinguishing cover 4, a housing 5, and a rotating shaft 6. The moving contact 1 is arranged inside the rotating shaft 6, and both ends of the rotating shaft 6 are connected to rotate inside the housing 5. The wiring board 3 and the static contact 2 are respectively clamped on the housing 5. The outer ends of the wiring board 3 and the static contact 2 are exposed outside the housing 5. The inner end of the wiring board 3 is connected to the moving contact 1 through a copper braided wire 7. The static contact 2 is arranged in front of the moving contact 1. The moving contact 1 rotates between the closed position and the breaking position. A contact part 21 is formed on the static contact 2 towards the moving contact 1, and the contact part 21 is bent upward in a J shape. When the moving contact 1 is in the closed position, it is connected to the contact part 21. The arc extinguishing cover 4 is arranged on one side of the static contact 2 towards the breaking position of the moving contact 1.

[0017] The moving contact 1 includes a moving contact side plate 11, a moving contact clamping plate 12, a spring piece 13 and a contact pressure plate 14. The two moving contact side plates 11 are arranged oppositely. Two pairs of relatively protruding partition blocks 15 are formed between the two moving contact side plates 11. A gap is formed between the two oppositely arranged moving contact side plates 11 through the mutual support of the partition blocks 15. The spring piece 13 is arranged outside one of the moving contact side plates 11. The moving contact clamping plate 12 is connected to the outside of the other moving contact side plate 11 and the outside of the spring piece 13. The moving contact pressure plate 14 is arranged between the spring piece 13 and the moving contact side plate 11. One side of the moving contact clamping plate 12 presses on the moving contact pressure plate 14 to clamp the spring piece 13 on the moving contact side plate 11.

[0018] The preferred embodiments of the present invention in the above specific embodiments, other obvious changes or combinations are also within the protection scope of the claims.

Claims

1. A contact system of a disconnector, comprising a moving contact, a static contact, and a terminal block. The terminal block is connected to the moving contact, the static contact is arranged in front of the moving contact, and the moving contact rotates between a closed position and an open position, characterized in that: A contact portion is formed on the static contact head facing the moving contact head. The contact portion is bent upward in a J shape, and the moving contact head is connected to the contact portion when in the closed position.

2. The contact system of the disconnector according to claim 1, characterized in that: The moving contact head includes moving contact head side plates, moving contact head clamping plates, and spring pieces. The two moving contact head side plates are arranged oppositely, and a relatively protruding partition block is formed between the two moving contact head side plates. A gap is formed between the two oppositely arranged moving contact head side plates through the mutual support of the partition blocks. The spring piece is arranged outside one of the moving contact head side plates, and the moving contact head clamping plate is connected to the outside of the other moving contact head side plate and the outside of the spring piece. The moving contact head clamping plate clamps the spring piece on the moving contact head side plate.

3. The contact system of the disconnector according to claim 1 or 2, characterized in that: A copper braid is arranged between the wiring board and the moving contact head, and the wiring board is connected to the moving contact head through the copper braid.

4. The contact system of the disconnector according to claim 2, characterized in that: The moving contact head further includes a moving contact head pressure plate, and the moving contact head pressure plate is arranged between the spring piece and the moving contact head side plate.

5. The contact system of the disconnector according to claim 3, characterized in that: The contact system further includes a housing and a rotating shaft. The moving contact head is arranged inside the rotating shaft, and both ends of the rotating shaft are connected to rotate inside the housing. The wiring board and the static contact head are respectively clamped on the housing, and the outer ends of the wiring board and the static contact head are exposed outside the housing.

6. The contact system of the disconnector according to claim 5, characterized in that: An arc extinguishing cover is arranged on one side of the static contact head at the breaking position facing the moving contact head.

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