A circuit breaker moving contact
With its split structure and dual connection method, the moving contact is made of copper and the swinging part is made of iron, which solves the problem of high cost of traditional pure copper circuit breakers and achieves the effects of cost reduction and service life extension.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YUN GUI ELECTRICAL SCI & TECH CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional miniature circuit breakers use a pure copper integrated structure for their moving contacts, resulting in high costs. How can we reduce costs and extend service life while ensuring product safety and reliability?
It adopts a split structure, with the moving contact made of copper and the swinging part made of iron. It is connected by a dual method of welding and riveting. Copper is only used in key conductive parts, and iron is used for mechanical support and installation. A limiting structure is added to improve the connection reliability.
It significantly reduces material costs, increases the service life and mechanical strength of moving contacts, reduces resource waste, and ensures the reliability and stability of connections.
Smart Images
Figure CN224437561U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a moving contact of a circuit breaker. Background Technology
[0002] Traditional miniature circuit breakers use a one-piece stamping process with pure copper for their moving contacts. 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 intense market competition, how to reduce product costs while ensuring product safety and compliance with regulations, and at the same time make the improved structure stable, reliable, and have a long service life, 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 moving contact of a circuit breaker.
[0004] The technical solution adopted by the moving contact of this utility model circuit breaker is characterized by comprising a moving contact contact element, a moving contact swing element, and a rear connecting shaft. The moving contact contact element includes a horizontally arranged contact element connecting part, the front end of which extends obliquely upward to form a contact element contact part. The bottom of the front end of the contact element contact part is provided with a contact element contact point part that contacts the stationary contact of the circuit breaker. The middle of the rear end of the contact element connecting part extends horizontally to form a contact element welding part and a contact element limiting part. The contact element limiting part has a T-shaped structure and a horizontally penetrating contact element rear connecting hole on its side. The moving contact swing element includes a swing element connecting end and a swing element arc part. The swing element arc part is provided with a moving contact connection for the swinging of the moving contact. The oscillating component connecting end is provided with a horizontally arranged front connecting part, a welding part, and a rear connecting part from front to back. The front connecting part wraps around the rear end of the contact component connecting part. The welding part has a first insertion port for inserting the welding part. The rear connecting part has a rear connecting part limiting port for limiting the contact component limiting part. The rear connecting part has a rear connecting hole communicating with the rear connecting hole of the contact component. The welding part is welded together with the welding part. The rear connecting shaft is riveted into the rear connecting hole of the contact component and the rear connecting hole of the oscillating component.
[0005] The moving contact component is made of copper, and the moving contact swing component is made of iron.
[0006] The front connecting part of the swing member is provided with a front connecting part limiting port for the rear end of the contact member connecting part to be inserted. The front end of the front connecting part of the swing member is bent inward to form a front insert of the swing member. The rear end of the contact member connecting part is provided with a front slot of the contact member that is opposite to the front insert of the swing member.
[0007] It also includes a front connecting shaft, the rear end of the contact member connecting part is provided with a horizontally penetrating contact member front connecting hole, the front connecting part of the swing member is provided with a swing member front connecting hole communicating with the contact member front connecting hole, and the front connecting shaft is riveted into the contact member front connecting hole and the swing member front connecting hole.
[0008] The bottom of the contact welding part is provided with a contact lower support plate, and the bottom of the swinging part welding part is provided with a swinging part lower positioning groove that connects with the contact lower support plate.
[0009] The outer wall of the welding section of the oscillating component is provided with an oscillating component indicator groove for easy identification during welding.
[0010] The advantages of this utility model of circuit breaker moving contact are as follows: It adopts a split structure. The moving contact swinging component is made of iron, which undertakes mechanical support and installation functions, while the moving contact contact component is made of copper, which is used for conductive and contact areas. 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. The moving contact swinging component and the moving contact contact component adopt a dual connection method of welding and riveting, and multiple limiting structures are designed to ensure the mechanical strength of the connection and the contact reliability of the welded contact surface, which effectively improves the service life of the moving contact. Attached Figure Description
[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0012] Figure 1 This is a schematic diagram of the structure of the moving contact of the circuit breaker of this utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the moving contact component of this utility model;
[0014] Figure 3 This is a front structural diagram of the moving contact swing component of this utility model;
[0015] Figure 4 This is a schematic diagram of the back structure of the moving contact swing component of this utility model. Detailed Implementation
[0016] like Figure 1-4As shown, the moving contact of the circuit breaker involved in this utility model includes a moving contact contact element 1, a moving contact swinging element 2, and a rear connecting shaft 3. The moving contact contact element 1 includes a horizontally arranged contact element connecting part 6. The front end of the contact element connecting part 6 extends obliquely upward to form a contact element contact part 7. The bottom of the front end of the contact element contact part 7 is provided with a contact element contact point part 8 that contacts the stationary contact of the circuit breaker. The middle of the rear end of the contact element connecting part 6 extends horizontally to form a contact element welding part 9 and a contact element limiting part 16. The contact element limiting part 16 has a T-shaped structure and a horizontally penetrating contact element rear connecting hole 20 on its side. The moving contact swinging element 2 includes a swinging element connecting end 10 and a swinging element arc part 11. The swinging element arc part 11 is provided with a moving contact connecting hole 19 for the swinging of the moving contact. The swinging element connecting end 10 is provided with a horizontally arranged swinging element front connecting part 12, a swinging element welding part 13, and a swinging element rear connecting part 14 from front to back. 4. The front connecting part 12 of the swing component is wrapped around the rear end of the contact component connecting part 6. The swing component welding part 13 is provided with a first insertion port 15 for the swing component to be inserted into the contact component welding part 9. The rear connecting part 14 of the swing component is provided with a rear connecting part limiting port 17 for the contact component limiting part 16 to be limited. The rear connecting part 14 of the swing component is provided with a swing component rear connecting hole 21 communicating with the contact component rear connecting hole 20. The swing component welding part 13 is welded together with the contact component welding part 9. The rear connecting shaft 3 is riveted into the contact component rear connecting hole 20 and the swing component rear connecting hole 21. It adopts a split structure. The moving contact swing component and the moving contact contact are connected by a dual connection method of welding and riveting through the rear connecting shaft 3. The swing component welding part 13 plays a conductive role to ensure the contact reliability of the welding contact surface. The swing component rear connecting part 14 ensures the mechanical strength of the connection and effectively improves the service life of the moving contact.
[0017] The moving contact 1 is made of copper and is used for conductive and contact areas. The moving contact swinging part 2 is made of iron and serves as a mechanical support and installation component. 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.
[0018] The front connecting part 12 of the swinging component is provided with a front connecting part limiting port 24 for the rear end of the contact connecting part 6 to be inserted. The front end of the front connecting part 12 of the swinging component is bent inward to form a swinging component front insertion part 25. The rear end of the contact connecting part 6 is provided with a contact front slot 23 that is opposite to the swinging component front insertion part 25, so that the front and rear parts of the welding point of the moving contact swinging component 2 are reliably limited with the moving contact contact 1, and the connection is tight and firm and not easy to loosen.
[0019] It also includes a front connecting shaft 4. The rear end of the contact member connecting part 6 is provided with a horizontally penetrating contact member front connecting hole 27. The swing member front connecting part 12 is provided with a swing member front connecting hole 28 communicating with the contact member front connecting hole 27. The front connecting shaft 4 is riveted into the contact member front connecting hole 27 and the swing member front connecting hole 28. The front connecting shaft 4 and the rear connecting shaft 3 form a front and rear double riveting at the welding joint, which effectively prevents the moving contact welding joint from shifting under vibration or impact and ensures mechanical strength.
[0020] The bottom of the contact welding part 9 is provided with a contact lower support plate 30, and the bottom of the swinging part welding part 13 is provided with a swinging part lower positioning groove 31 that docks with the contact lower support plate 30, which plays a lower support role, effectively reducing the vertical movement of the moving contact swinging part 2 after docking, and further improving safety.
[0021] The outer wall of the oscillating component welding part 13 is provided with an oscillating component indicator groove 32 for easy identification during welding, which provides good indication during welding and improves welding efficiency.
[0022] 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 moving contact, characterized by: The circuit includes a moving contact (1), a moving contact swing member (2), a rear connecting shaft (3), and a front connecting shaft (4). The moving contact (1) is made of copper, and the moving contact swing member (2) is made of iron. The moving contact (1) includes a horizontally arranged contact member connecting part (6). The front end of the contact member connecting part (6) extends upward to form a contact member touching part (7). The bottom of the front end of the contact member touching part (7) is provided with a contact member contact point part (8) that contacts the stationary contact of the circuit breaker. The middle of the rear end of the contact member connecting part (6) extends horizontally to form a contact member welding part (9) and a contact member limiting part (16). The contact member limiting part (16) is a T-shaped structure, and its side is provided with a horizontally penetrating contact member rear connecting hole (20). The moving contact swing member (2) includes... The swing component connecting end (10) and the swing component arc portion (11) are provided. The swing component arc portion (11) is provided with a moving contact connecting hole (19) for the swing of the moving contact. The swing component connecting end (10) is provided with a horizontally arranged swing component front connecting part (12), swing component welding part (13) and swing component rear connecting part (14) from front to back. The swing component front connecting part (12) wraps around the rear end of the contact component connecting part (6). The swing component front connecting part (12) is provided with a front connecting part limiting port (24) for the rear end of the contact component connecting part (6) to be inserted. The front end of the swing component front connecting part (12) is bent inward to form a swing component front insertion part (25). The rear end of the contact component connecting part (6) is provided with a contact component front slot (23) that is opposite to the swing component front insertion part (25). The swing component welding part (13) is provided with a swing component first insertion port (15) for inserting the contact component welding part (9), the swing component rear connection part (14) is provided with a rear connection part limiting port (17) for limiting the contact component limiting part (16), the swing component rear connection part (14) is provided with a swing component rear connection hole (21) communicating with the contact component rear connection hole (20), and the swing component welding part (13) is welded together with the contact component welding part (9); The rear connecting shaft (3) is riveted into the rear connecting hole (20) of the contact and the rear connecting hole (21) of the swing component. The rear end of the contact connecting part (6) is provided with a horizontally penetrating front connecting hole (27) of the contact. The front connecting part (12) of the swing component is provided with a swing front connecting hole (28) communicating with the front connecting hole (27) of the contact. The front connecting shaft (4) is riveted into the front connecting hole (27) of the contact and the front connecting hole (28) of the swing. The bottom of the contact welding part (9) is provided with a contact lower support plate (30), and the bottom of the swinging part welding part (13) is provided with a swinging part lower positioning groove (31) that connects with the contact lower support plate (30).
2. The breaker moving contact of claim 1, wherein: The outer wall of the oscillating component welding part (13) is provided with an oscillating component indicator groove (32) for easy identification during welding.