A moving contact of a dual power transfer switch

Abstract

This utility model discloses a moving contact of a dual-power transfer switch, including a rotating arm and moving contacts disposed on the rotating arm. A rotating hole is provided at the rear of the rotating arm for an external shaft to pass through and rotate. Two moving contacts are disposed at the front of the rotating arm, forming a clamping space between them to hold a stationary contact. The two moving contacts are inclined relative to each other, causing the distance between them to gradually decrease from the near end to the far end. The two moving contacts of this utility model form a clamping space for the stationary contact to be accommodated, resulting in a good clamping and closing state. Furthermore, the inclined moving contacts are elastically supported by the stationary contact, making the clamping and closing state more stable and ensuring the normal operation of the dual-power transfer switch.

Description

Technical Field

[0001] This utility model relates to the field of electrical switches, and in particular to a moving contact of a dual power supply transfer switch. Background Technology

[0002] In a dual-power transfer switch, the contact system is a key structure. The movement of the moving contact switches between the main power supply and the backup power supply by interacting with two stationary contacts. Traditionally, the moving and stationary contacts close face-to-face, relying on the pressure of the moving contact to ensure stable closure. However, if the mechanical structure becomes loose, abnormal opening may occur, affecting the normal operation of the dual-power transfer switch. This invention aims to design a new moving contact structure to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a moving contact for a dual power supply transfer switch. By having two moving contacts clamp the stationary contact during closing, the stability of closing is ensured, thus guaranteeing the normal operation of the dual power supply transfer switch.

[0004] The present invention adopts the following technical solution: a moving contact of a dual power supply changeover switch, including a rotating arm and a moving contact disposed on the rotating arm. A rotating hole is provided at the rear of the rotating arm for an external shaft to pass through and rotate. Two moving contacts are disposed at the front of the rotating arm, and a clamping space for clamping a stationary contact is formed between the two moving contacts. The two moving contacts are arranged at an angle relative to each other, thereby causing the distance between the two moving contacts to gradually decrease from the near end to the far end.

[0005] As an improvement, the front of the rotating arm has two mounting holes, and two moving contacts are respectively set in the two mounting holes.

[0006] As an improvement, an elastic pressure plate is provided in the mounting hole. The elastic pressure plate is located on the outside of the moving contact, thereby causing the two moving contacts to abut against each other.

[0007] As an improvement, a mounting shaft is laterally inserted through the rotating arm, passing through the elastic pressure plate and the moving contact, and is thus integrated with the rotating arm.

[0008] As an improvement, the two moving contacts are staggered in the rotation direction of the rotating arm, so that the two moving contacts come into contact or separate sequentially when they reach or leave the stationary contact.

[0009] As an improvement, the rear part of the moving contact extends outward from the side of the mounting hole to form a connecting piece.

[0010] As an improvement, the front end of the rotating arm extends to both sides to form an arc-shaped stop.

[0011] The beneficial effects of this utility model are: the clamping space formed by the two moving contacts allows the stationary contact to be accommodated therein, forming a good clamping and closing state, and the inclined moving contact is elastically supported by the stationary contact, thereby making the clamping and closing state more stable and ensuring the normal operation of the dual power supply transfer switch. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the moving contact of this utility model. Figure 1 .

[0013] Figure 2 This is a three-dimensional structural diagram of the moving contact of this utility model. Figure 2 .

[0014] Figure 3 This is a longitudinal sectional view of the moving contact of this utility model.

[0015] Figure 4 This is a three-dimensional structural diagram of the moving contact of this utility model when it is installed in a dual power supply changeover switch. Detailed Implementation

[0016] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] like Figure 1 , 2 Figures 3 and 4 show a specific embodiment of the moving contact of the dual power supply changeover switch of this utility model. This embodiment includes a rotating arm 2 and a moving contact 1 disposed on the rotating arm 2. A rotating hole 21 is provided at the rear of the rotating arm 2 for an external shaft to pass through and rotate. Two moving contacts 1 are disposed at the front of the rotating arm 2, and a clamping space 11 for clamping the stationary contact is formed between the two moving contacts 1. The two moving contacts 1 are arranged at an angle relative to each other, so that the distance between the two moving contacts 1 gradually decreases from the near end to the far end.

[0018] In use, the rotating arm 2 and the stationary contact 01 are housed in the housing 0 of the dual power supply transfer switch. The stationary contact 01 is arranged on both sides of the rotating arm 2. When the moving contact 1 rotates to close with the stationary contacts 01 on both sides, the main power supply and the backup power supply are closed. The rotating hole 21 at the rear of the rotating arm 2 is used to pass through the drive shaft, which is connected to the opening and closing operation mechanism. When switching is required, the rotating arm 2 is driven to rotate, which drives the moving contact 1 to close and open with the stationary contacts 01 on both sides. The two moving contacts 1 rotate to reach the stationary contact 01, and the stationary contact 01 enters the clamping space 11. The two moving contacts 1 achieve stable clamping and engagement with the stationary contact 01, thereby ensuring stable closing. This vertical, sheet-like engagement configuration ensures that the moving contact 1 and the stationary contact 01 maintain a continuous contact position relative to the rotational stroke of the rotating arm 2. Even slight changes in the rotational position of the rotating arm 2 and the moving contact 1 will not affect the closing state, thus guaranteeing the stability of the closing operation. In specific implementation, the size of the clamping space 11 is set smaller than that of the stationary contact 01. When the two moving contacts 1 rotate to the sides of the stationary contact 01 and the stationary contact 01 is accommodated in the clamping space 11, the stationary contact 01 moves outwards against the moving contacts 1, thereby making the contact state, i.e., the closing state, more stable. The proximal end of the moving contact 1 is the end closest to the rotating arm 2, and the distal end is the open end away from the rotating arm 2. The distance between the two moving contacts 1 is specifically set so that the distal end gradually decreases in size, keeping the two moving contacts 1 in a good closed state. When engaging with the stationary contact 01, the two moving contacts 1 are pushed outwards, thereby achieving a good contact closing state.

[0019] As an improved specific implementation, the front part of the rotating arm 2 has two mounting holes 22, and the two moving contacts 1 are respectively disposed in the two mounting holes 22.

[0020] like Figure 1-4 As shown, the two moving contacts 1 are installed in the two mounting holes 22 on the left and right. The distance between the two moving contacts 1 is limited by the distance between the two mounting holes 22. The front part of the moving contact 1 extends out of the mounting hole 22 and forms a clamping space. The extended part can be deformed to adapt to the cooperation with the stationary contact 01.

[0021] As an improved specific implementation, an elastic pressure plate 12 is provided in the mounting hole 22. The elastic pressure plate 12 is located on the outside of the moving contact 1, thereby causing the two moving contacts 1 to abut against each other.

[0022] like Figure 1-4As shown, the elastic pressure plate 12 and the moving contact 1 are both housed in the mounting hole 22. The elastic pressure plate 12 abuts against the moving contact 1 from the outside inward, thereby effectively limiting the moving contact 1. The front part of the elastic pressure plate 12 extends out of the mounting hole 22 and abuts against the outside of the moving contact 1, thereby keeping the front ends of the two moving contacts 1 in a relatively inclined structural state, ensuring better clamping and closing with the stationary contact 01.

[0023] As an improved specific implementation, a mounting shaft 23 is transversely inserted through the rotating arm 2. The mounting shaft 23 passes through the elastic pressure plate 12 and the moving contact 1 and is thus integrated with the rotating arm 2.

[0024] like Figure 1-4 As shown, the elastic pressure plate 12 and the moving contact 1 are structurally installed by a mounting shaft 23 that passes through the rotating arm 2. The structure is simple and easy to manufacture. The mounting shaft 23 can be installed and locked on the rotating arm 2 using conventional fasteners.

[0025] As an improved specific implementation, the two moving contacts 1 are staggered in the rotation direction of the rotating arm 2, so that the two moving contacts 1 contact or separate sequentially when rotating to or away from the stationary contact.

[0026] like Figure 1 , 4 As shown, when the moving contact 1 closes or opens with the stationary contact 01, a temperature rise or an electric arc will occur. The staggered arrangement of the two moving contacts 1 ensures that, whether closing or opening, only one moving contact 1 first contacts or separates from the stationary contact 01 through rotation. This ensures that the temperature rise or electric arc occurs at only one moving contact 1, thus avoiding damage to both moving contacts 1 simultaneously in the event of simultaneous contact. In actual use, even if one moving contact 1 is accidentally burned out, the other moving contact 1 can maintain the working state of the contact mechanism. Afterwards, the staff can promptly troubleshoot and repair the fault and adjust the equipment according to the actual working conditions.

[0027] As an improved specific implementation, the rear part of the moving contact 1 extends outward from the side of the mounting hole 22 to form a connecting piece 13.

[0028] like Figure 4 As shown, the connecting piece 13 extends from the rear, making it easy to connect to the extension frame 02 of the housing 0 via a flexible connection such as a wire, and the extension frame 02 connects to the external wiring.

[0029] As an improved specific implementation, the front end of the rotating arm 2 extends to both sides to form an arc-shaped stop surface 24.

[0030] like Figure 1 , 2As shown in Figure 4, the moving contact 1 and the stationary contact 01 will generate an electric arc when the circuit is opened. The arc-shaped baffles 24 set on both sides of the front end of the rotating arm 2 can block the position of the stationary contacts 01 when the circuit is opened, thereby preventing the electric arc and airflow from flowing to the arc extinguishing chamber. This allows the electric arc to be better guided into the arc extinguishing chamber to complete the arc extinguishing, thus improving the safety of the dual power supply transfer switch opening.

[0031] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A moving contact of a double-pole changeover switch, comprising a rotating arm (2) and a moving contact (1) arranged on the rotating arm (2), characterized in that: The rear part of the rotating arm (2) is provided with a rotating hole (21) for an external shaft to pass through and rotate. The front part of the rotating arm (2) is provided with two moving contacts (1). A clamping space (11) for clamping the stationary contact is formed between the two moving contacts (1). The two moving contacts (1) are inclined relative to each other, so that the distance between the two moving contacts (1) gradually decreases from the near end to the far end.

2. A moving contact of a dual power transfer switch according to claim 1, characterized in that: The front part of the rotating arm (2) has two mounting holes (22), and two moving contacts (1) are respectively disposed in the two mounting holes (22).

3. The moving contact of a dual-power transfer switch according to claim 2, characterized in that: An elastic pressure plate (12) is provided in the mounting hole (22). The elastic pressure plate (12) is located outside the moving contact (1), thereby causing the two moving contacts (1) to abut against each other.

4. The moving contact of a dual power supply transfer switch according to claim 3, characterized in that: A mounting shaft (23) is transversely inserted through the rotating arm (2). The mounting shaft (23) passes through the elastic pressure plate (12) and the moving contact (1) and is then installed as a whole with the rotating arm (2).

5. The moving contact of a dual-power transfer switch according to any one of claims 1-4, characterized in that: The two moving contacts (1) are staggered in the rotation direction of the rotating arm (2), so that the two moving contacts (1) come into contact or separate one after the other when they rotate to reach or leave the stationary contact.

6. The moving contact of a dual power supply transfer switch according to any one of claims 2-4, characterized in that: The rear part of the moving contact (1) extends outward from the side of the mounting hole (22) to form a connecting piece (13).

7. The moving contact of a dual-power transfer switch according to any one of claims 1-4, characterized in that: The front end of the rotating arm (2) extends to both sides to form an arc-shaped stop (24).

Images