A circuit breaker stationary contact assembly with arc-starting elements

Abstract

This utility model relates to a circuit breaker stationary contact assembly with an arc-starting piece. The technical problem this utility model aims to solve is to provide a circuit breaker stationary contact assembly with an arc-starting piece. The technical solution adopted by this utility model includes a stationary contact body, a silver dot, an arc-starting piece, and a connecting shaft. The stationary contact body includes a stationary contact mating portion, which is vertically bent inwards to form a stationary contact mounting portion, a stationary contact transition portion, and a stationary contact support portion. The stationary contact mating portion includes a stationary contact contact portion, a stationary contact welding portion, and a stationary contact reinforcement portion. The silver dot is welded to the outside of the stationary contact contact portion, and the upper end of the stationary contact welding portion extends obliquely outwards to form the stationary contact reinforcement portion. The advantages of this utility model are: the use of a split structure effectively reduces the overall product cost; and the use of a dual connection method of welding and riveting at the joint between the arc-starting piece and the stationary contact body ensures the mechanical strength of the connection and the contact reliability of the welded contact surface.

Description

Technical Field

[0001] This utility model relates to a circuit breaker stationary contact assembly with an arc-starting plate. Background Technology

[0002] The existing circuit breaker stationary contact assembly and arc ignition plate are made of pure copper through integral stamping. Pure copper is widely used due to its high conductivity and wear resistance, but its high price leads to high manufacturing costs. With the current fierce market competition, how to reduce the cost of products while ensuring product safety and compliance with regulations, and at the same time make the improved structure stable, reliable and long-lasting, is a research and development direction in this industry. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a circuit breaker stationary contact assembly with an arc-inducing plate.

[0004] The technical solution adopted by the circuit breaker stationary contact assembly with arc-starting plate of this utility model is characterized by comprising a stationary contact body, a silver dot, an arc-starting plate and a connecting shaft. The stationary contact body includes a stationary contact mating part, which is vertically bent inward to form a stationary contact mounting part, a stationary contact transition part and a stationary contact support part. The stationary contact mating part includes a stationary contact contact part, a stationary contact welding part and a stationary contact reinforcing part arranged in sequence from bottom to top. The silver dot is welded to the outside of the stationary contact contact part, and the upper end of the stationary contact welding part extends obliquely outward to form the stationary contact reinforcing part.

[0005] The arc-starting piece includes an arc-starting piece welding part that is in contact with the stationary contact part, an arc-starting piece reinforcing part that is in contact with the stationary contact reinforcing part, and an arc-starting piece guiding part for arc-starting the stationary contact. The arc-starting piece welding part is welded together with the stationary contact welding part. The stationary contact reinforcing part is provided with a stationary contact connecting hole, and the arc-starting piece reinforcing part is provided with an arc-starting piece connecting hole. The connecting shaft is riveted into the stationary contact connecting hole and the arc-starting piece connecting hole.

[0006] The stationary contact body is made of copper, and the arc-starting plate is made of iron.

[0007] The end of the stationary contact support portion is provided with a support portion limiting groove for limiting the stationary contact welding portion near the end of the stationary contact contact portion.

[0008] The front end of the arc-starting plate welding part is bent in sequence to form an arc-starting plate front insertion part that is parallel to the arc-starting plate welding part. The stationary contact support part is provided with a support part insertion port for inserting the arc-starting plate front insertion part.

[0009] The left and right ends of the arc-starting plate welding part are vertically bent to form an arc-starting plate wrapping part for wrapping around the stationary contact welding part.

[0010] The stationary contact part is provided with a contact part positioning groove for positioning during the silver spot welding.

[0011] The advantages of this utility model of a circuit breaker stationary contact assembly with an arc-initiating plate are as follows: It adopts a split structure, with the arc-initiating plate made of iron to perform the arc-initiating function, and the stationary contact body made of copper for conductive and contact areas. The cost of iron is much lower than that of pure copper, significantly reducing the proportion of material costs. Copper is only used in key conductive parts, effectively reducing the overall product cost and minimizing resource waste. The arc-initiating plate and the stationary contact body are joined by a dual connection method of welding and riveting, which ensures the mechanical strength of the connection and the contact reliability of the welded contact surface, effectively improving the service life. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of the stationary contact assembly of the circuit breaker with arc-inducing plate according to this utility model;

[0014] Figure 2 This is a front structural diagram of the main body of the stationary contact of this utility model;

[0015] Figure 3 This is a schematic diagram of the back structure of the static contact body of this utility model;

[0016] Figure 4 This is a schematic diagram of the arc-inducing plate of this utility model. Detailed Implementation

[0017] like Figure 1-4As shown, the circuit breaker stationary contact assembly with arc-starting plate of this utility model includes a stationary contact body 1, a silver dot 2, an arc-starting plate 3, and a connecting shaft 4. The stationary contact body 1 includes a stationary contact mating portion 6, which is vertically bent inward to form a stationary contact mounting portion 7, a stationary contact transition portion 8, and a stationary contact support portion 9. The stationary contact mating portion 6 includes a stationary contact contact portion 10, a stationary contact welding portion 11, and a stationary contact reinforcing portion 12 arranged sequentially from bottom to top. The silver dot 2 is welded to the outside of the stationary contact contact portion 10, and the upper end of the stationary contact welding portion 11 extends obliquely outward to form the stationary contact reinforcing portion 12. The arc-starting plate 3 includes a contact portion with the stationary contact. The system includes a welded arc-starting plate 13 that fits into the stationary contact reinforcement 12, an arc-starting plate reinforcement 14 that fits into the stationary contact reinforcement 12, and an arc-starting plate guide 15 for igniting the arc at the stationary contact. The arc-starting plate welded part 13 is welded together with the stationary contact welded part 11. The stationary contact reinforcement 12 is provided with a stationary contact connection hole 17, and the arc-starting plate reinforcement 14 is provided with an arc-starting plate connection hole 18. The connecting shaft 4 is riveted into the stationary contact connection hole 17 and the arc-starting plate connection hole 18. At the joint between the arc-starting plate 3 and the stationary contact body 1, a dual connection method of welding and riveting is adopted, which ensures the mechanical strength of the connection and the contact reliability of the welded contact surface, and effectively improves the service life.

[0018] The stationary contact body 1 is made of copper and is used for conductive and contact areas. The arc-starting plate 3 is made of iron and is responsible for arc starting. The cost of iron is much lower than that of pure copper, which significantly reduces the proportion of material cost. Copper is only used in key conductive parts, which effectively reduces the overall cost of the product and reduces resource waste.

[0019] The stationary contact support 9 has a support limiting groove 19 at its end for limiting the stationary contact welding part 11 near the stationary contact contact part 10, and the overall structure of the stationary contact body 1 is stable.

[0020] The front end of the arc-starting plate welding part 13 is bent in sequence to form an arc-starting plate front insertion part 21 arranged parallel to the arc-starting plate welding part 13. The stationary contact support part 9 is provided with a support insertion port 22 for inserting the arc-starting plate front insertion part 21. The arc-starting plate front insertion part 21 provides a front support for the arc-starting plate 3 after connection and cooperates with the arc-starting plate reinforcement part 14 to effectively reduce the stress at the arc-starting plate welding part 13 and ensure reliable and stable contact at the welding surface.

[0021] The left and right ends of the arc-starting plate welding part 13 are vertically bent to form an arc-starting plate wrapping part 23 for wrapping around the stationary contact welding part 11, thereby enhancing structural rigidity and further improving connection tightness.

[0022] The stationary contact part 10 is provided with a contact part positioning groove 25 for positioning the silver spot 2 during welding.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A circuit breaker stationary contact assembly with an arc-starting element, characterized in that: The device includes a stationary contact body (1), a silver dot (2), an arc-starting plate (3), and a connecting shaft (4). The stationary contact body (1) includes a stationary contact mating part (6). The stationary contact mating part (6) is bent vertically inward to form a stationary contact mounting part (7), a stationary contact transition part (8), and a stationary contact support part (9). The stationary contact mating part (6) includes a stationary contact contact part (10), a stationary contact welding part (11), and a stationary contact reinforcing part (12) arranged from bottom to top. The silver dot (2) is welded to the outside of the stationary contact contact part (10). The upper end of the stationary contact welding part (11) extends outward at an angle to form the stationary contact reinforcing part (12). The arc-starting piece (3) includes an arc-starting piece welding part (13) that is attached to the stationary contact part (10), an arc-starting piece reinforcing part (14) that is attached to the stationary contact reinforcing part (12), and an arc-starting piece guiding part (15) for igniting the arc of the stationary contact. The arc-starting piece welding part (13) is welded together with the stationary contact welding part (11). The stationary contact reinforcing part (12) is provided with a stationary contact connecting hole (17), and the arc-starting piece reinforcing part (14) is provided with an arc-starting piece connecting hole (18). The connecting shaft (4) is riveted into the stationary contact connecting hole (17) and the arc-starting piece connecting hole (18).

2. The circuit breaker stationary contact assembly with arc-starting element according to claim 1, characterized in that: The stationary contact body (1) is made of copper, and the arc-starting plate (3) is made of iron.

3. The circuit breaker stationary contact assembly with arc-starting element according to claim 2, characterized in that: The end of the stationary contact support (9) is provided with a support limiting groove (19) for limiting the stationary contact welding part (11) near the end of the stationary contact contact part (10).

4. The circuit breaker stationary contact assembly with arc-starting element according to claim 3, characterized in that: The front end of the arc-starting plate welding part (13) is bent in sequence to form an arc-starting plate front insertion part (21) arranged parallel to the arc-starting plate welding part (13). The stationary contact support part (9) is provided with a support part insertion port (22) for inserting the arc-starting plate front insertion part (21).

5. The circuit breaker stationary contact assembly with arc-starting element according to claim 1, characterized in that: The left and right ends of the arc-starting plate welding part (13) are vertically bent to form an arc-starting plate wrapping part (23) for wrapping around the stationary contact welding part (11).

6. The circuit breaker stationary contact assembly with arc-starting plate according to claim 1, characterized in that: The stationary contact part (10) is provided with a contact part positioning groove (25) for positioning the silver point (2) during welding.

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