A linkage of a circuit breaker operating mechanism

Abstract

This application relates to the technical field of mechanical connecting components, and in particular to a connecting rod of a circuit breaker operating mechanism. The connecting rod includes two parallel and oppositely arranged movable plates, with at least two connecting plates positioned between them, near the two ends of the movable plates. The connecting rod also includes a fixed portion and a movable portion. The fixed portion is fixedly connected to one of the movable plates, and the movable portion is fixedly connected to the other movable plate. The fixed portion and the movable portion are connected by a detachable connection structure. This application increases the number of connecting plates and optimizes their positions, and also includes a detachable portion, achieving the effects of enhancing the overall strength of the connecting rod, improving its resistance to deformation, and allowing for adjustment of the spacing between the movable plates.

Description

Technical Field

[0001] This application relates to the technical field of mechanical connection components, and in particular to a linkage of a circuit breaker operating mechanism. Background Technology

[0002] Circuit breakers, as crucial protective devices in power systems, are essential for ensuring the stable operation of these systems. With the continuous advancement of the power industry, the performance requirements for circuit breakers are becoming increasingly stringent. The operating mechanism, as a core component of the circuit breaker, directly impacts its overall performance. A reliable operating mechanism ensures accurate and timely operation of the circuit breaker under various operating conditions, effectively protecting power equipment and personnel safety. Throughout the continuous development of power systems, the improvement and optimization of circuit breaker operating mechanisms has been a key research direction within the industry.

[0003] In previous technologies, to achieve the function of the circuit breaker operating mechanism, the linkage typically consisted of two opposing movable plates connected by a simple joint at the ends of the movable plates. This arrangement was based on the prevailing understanding of linkage structure and function, assuming that a single end connector was sufficient to meet the basic connection requirements of the linkage. This was because it could, to a certain extent, connect the linkage to the moving contact and allow the operating mechanism to control the linkage's oscillation, while also saving materials and costs.

[0004] Because the movable plates only have a simple connection and are located at one end, the connection effect is poor. When the other end of the movable plate, which lacks a connection, is subjected to external impact, the connecting rod is prone to deformation. This deformation may cause the connecting rod to malfunction, thus affecting the reliability of the circuit breaker operating mechanism and ultimately impacting the circuit breaker's performance. Furthermore, the fixed connection results in a fixed spacing between the movable plates, lacking flexibility and limiting its applicability. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this application is to provide a linkage for a circuit breaker operating mechanism. The technical solution adopted is as follows: It includes two movable pieces arranged in parallel and opposite directions, and at least two connecting pieces are provided between the movable pieces, with the connecting pieces respectively located near the two ends of the movable pieces; The connecting rod also includes a fixed part and a movable part. The fixed part is fixedly connected to one of the movable pieces, and the movable part is fixedly connected to the other movable piece. The fixed part and the movable part are connected by a detachable connection structure.

[0006] By adopting the above technical solution, increasing the number of connecting pieces and optimizing their positions, the overall strength and deformation resistance of the connecting rod are enhanced. The detachable connection structure links the fixed and movable parts, allowing for quick disassembly and assembly of the connecting rod during installation and maintenance, greatly improving maintenance efficiency and convenience. Simultaneously, this structure allows for adjustment of the overall length or position of the connecting rod when needed, enhancing its adaptability and flexibility, making it suitable for different specifications of circuit breaker operating mechanisms, thereby improving the product's versatility and practicality.

[0007] Optionally, the fixed part and the movable part are connected by a snap-fit ​​structure, the snap-fit ​​structure including a buckle disposed on the fixed part and a slot disposed on the movable part.

[0008] By adopting the above technical solution, a snap-fit ​​structure (including snap-fit ​​and slot) is used to connect the fixed part and the movable part, so that the connection process can be completed without tools, making the operation simple and quick, reducing the installation difficulty and time cost; the snap-fit ​​structure also provides reliable connection strength, avoiding the risk of loosening or falling off, and ensuring the stability and safety of the circuit breaker operating mechanism during operation.

[0009] Optionally, the snap-fit ​​structure has multiple selectable snap-fit ​​positions along the longitudinal axis of the fixed part or the movable part.

[0010] By adopting the above technical solution, multiple selectable snap-fit ​​positions are set in the snap-fit ​​structure, allowing users to adjust the relative positions of the fixed part and the movable part according to actual needs, thereby achieving fine adjustment of the link length. This design provides a high degree of adjustment flexibility, can accurately match the installation requirements of different circuit breakers, avoids the cost of customized production, and improves the applicability and economy of the link.

[0011] Optionally, the plurality of snap-fit ​​positions are arranged at intervals along the longitudinal axis of the fixing part.

[0012] By adopting the above technical solution, multiple snap-fit ​​positions are arranged at intervals along the longitudinal axis of the fixing part, so that each snap-fit ​​position has a clear positioning point, and uniform and precise length changes can be achieved during adjustment; this interval arrangement helps to maintain the balance and stability of the connecting rod, prevents stress concentration caused by position deviation, and extends the service life of the connecting rod.

[0013] Optionally, the buckle is a protrusion, and the slot is a recess that fits the protrusion.

[0014] By adopting the above technical solution, the buckle is specifically designed as a protrusion and the slot as a recess. This adaptive structure enables a self-locking effect when the buckle is engaged, making the connection more secure and reliable. The simple shape of the protrusion and recess is easy to process and form, reducing production costs, while ensuring alignment accuracy during connection and reducing the possibility of installation errors.

[0015] Optionally, both the fixed part and the movable part are fixedly connected to the movable piece by a bolt assembly.

[0016] By adopting the above technical solution, the bolt assembly connects the fixed part and the movable piece, as well as the movable part and the movable piece, providing strong fastening force that can withstand the high intensity and frequent mechanical stress during circuit breaker operation. The bolt connection also allows for repeated disassembly and reassembly, facilitating later maintenance or replacement of parts and improving the maintainability and durability of the connecting rod.

[0017] Optionally, the two connecting pieces are symmetrically arranged on both sides of the longitudinal center line of the movable piece.

[0018] By adopting the above technical solution, the two connecting plates are symmetrically arranged on both sides of the longitudinal center line of the movable plate, so that the force distribution of the connecting rod is uniform when it is under force, avoiding the phenomenon of uneven load or torsion. This symmetrical design enhances the structural stability and fatigue resistance of the connecting rod, ensures the smooth operation of the circuit breaker operating mechanism, and reduces the risk of failure.

[0019] Optionally, the connecting piece and the movable piece are integrally stamped structures.

[0020] By adopting the above technical solution, the connecting piece and the movable piece are designed as an integral stamping structure, eliminating the weaknesses caused by welding or assembly, and improving the overall strength and rigidity. The stamping process is efficient and low-cost, suitable for mass production, while ensuring the consistency and precision of parts, and improving the reliability and economy of the connecting rod.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By increasing the number of connecting pieces and optimizing their positions, the overall strength and deformation resistance of the connecting rod are enhanced. A detachable connection structure links the fixed and movable parts, allowing for quick disassembly and assembly of the connecting rod during installation and maintenance, significantly improving maintenance efficiency and convenience. Simultaneously, this structure allows for adjustment of the overall length or position of the connecting rod when needed, enhancing its adaptability and flexibility, making it suitable for different specifications of circuit breaker operating mechanisms, thereby improving the product's versatility and practicality. 2. By employing symmetrically arranged connecting plates and bolt fixing designs, uniform force distribution on the connecting rod is ensured, avoiding eccentric loading. Simultaneously, the self-locking design of the snap-fit ​​structure and the integrated stamping process enhance the mechanical strength and rigidity of the parts from both the connection point and overall structure perspectives, ensuring the smooth and safe operation of the circuit breaker operating mechanism under frequent operation and high loads. 3. The one-piece stamping design not only optimizes mechanical properties but also makes it highly suitable for mass production due to its simple process and good consistency, helping to control manufacturing costs and improve production efficiency. In summary, this linkage design, through multiple optimizations in structure, connection, and process, comprehensively achieves a balance between high adaptability, high reliability, ease of maintenance, and low-cost manufacturing, providing a superior and cost-effective solution for circuit breaker operating mechanisms. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the connecting rod; Figure 2 This is a structural diagram of the fixed part and the movable part; In the picture, 1. Event video; 2. Connecting piece; 21. Fixing part; 211. Buckle; 22. Movable part; 221. Slot. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail below.

[0024] A linkage of a circuit breaker operating mechanism, as shown in the reference Figure 1 The linkage includes two movable plates 1 arranged opposite each other and multiple connecting plates 2 connecting the movable plates 1. The linkage also includes a detachably connected fixed part 21 and a movable part 22. The fixed part 21 is fixedly connected to one of the movable plates 1, and the movable part 22 is fixedly connected to another movable plate 1. Increasing the number of connecting plates 2 and optimizing their positions enhances the overall strength and deformation resistance of the linkage. The detachable connection structure connecting the fixed part 21 and the movable part 22 allows for quick disassembly and assembly of the linkage during installation and maintenance, greatly improving maintenance efficiency and convenience. Simultaneously, this structure allows for adjustment of the overall length or position of the linkage when needed, enhancing its adaptability and flexibility, making it suitable for different specifications of circuit breaker operating mechanisms, thereby improving the product's versatility and practicality.

[0025] Specifically, movable plate 1 is a key component of the connecting rod, serving to connect the moving contact and coordinate with the swinging of the operating mechanism. Movable plate 1 is typically made of metal, such as stainless steel or carbon steel, which possess high strength and toughness to meet the mechanical performance requirements of the connecting rod during circuit breaker operation. Movable plate 1 is generally elongated with a relatively flat surface to ensure connection and coordination with other components. Of course, in some special applications, movable plate 1 can also be made of other alloy materials with similar strength and toughness.

[0026] Furthermore, the connecting piece 2 is used to connect two opposing movable pieces 1. The two ends of the connecting piece 2 are arc-shaped and welded to the movable pieces 1 respectively. This arc-shaped structure can buffer external impacts to a certain extent, further improving the connecting rod's resistance to deformation. The material of the connecting piece 2 is similar to that of the movable pieces 1, and is also mostly metal. During manufacturing, the connecting piece 2 and the movable pieces 1 can be integrally stamped, ensuring the connection strength and stability between them. For example, in a stamping die, metal sheets are stamped according to a predetermined shape and size, forming the integral structure of the movable pieces 1 and the connecting piece 2 in one step. The two connecting pieces 2 are symmetrically arranged on both sides of the center line of the movable pieces 1. This symmetrical arrangement makes the connecting rod more balanced under stress, further enhancing its stability.

[0027] To reduce the production difficulty of the aforementioned one-piece stamping, the movable piece 1 and the connecting piece 2 can also be manufactured separately. Both the fixed part 21 and the movable part 22 are fixedly connected to the movable piece 1 via bolt assemblies. The bolt assembly generally includes bolts and nuts; by tightening the bolts and nuts, the fixed part 21 can be securely connected to the movable piece 1. This connection method facilitates installation and disassembly, and makes maintenance and adjustment of the connecting rod convenient. The fixed part 21 and the movable part 22 are connected by a snap-fit ​​structure, which includes a snap-fit ​​211 on the fixed part 21 and a snap-fit ​​groove 221 on the movable part 22.

[0028] Furthermore, refer to Figure 2 The buckle 211 is a protrusion, and the slot 221 is a recess that matches the protrusion. This matching structure of the protrusion and the through hole ensures the stability of the snap-fit. The snap-fit ​​structure has multiple selectable snap-fit ​​positions along the length of the fixed part 21 or the movable part 22, and these multiple snap-fit ​​positions are arranged at intervals along the longitudinal axis of the fixed part 21. By selecting different snap-fit ​​positions, the distance between the two movable pieces 1 can be changed, thereby adapting to the connection of moving contacts of different sizes.

[0029] Similarly, a through hole is provided between adjacent latches 211, and the portion between adjacent slots 221 passes through the through hole to enhance positioning and limiting functions. When connecting a larger moving contact, pressing the portion between the slots 221 with external force allows for selection of a position where the fixed part 21 and the moving part 22 are further apart; when connecting a smaller moving contact, pressing the portion between the slots 221 with external force allows for selection of a position where the locking position is closer together.

[0030] Furthermore, the snap-fit ​​structure can take other forms. For example, the snap-fit ​​structure may include an elastic claw disposed on the fixed part 21 and a snap hole disposed on the movable part 22. The elastic claw has a certain degree of elasticity; when inserted into the snap hole, the claw opens and snaps into the hole, realizing the snap-fit ​​between the fixed part 21 and the movable part 22. This snap-fit ​​method can also realize the detachable connection between the fixed part 21 and the movable part 22, and in some cases, the snap-fit ​​method of the elastic claw is more convenient and faster. The snap-fit ​​structure using elastic claws and snap holes provides another feasible solution for connecting the fixed part 21 and the movable part 22 of the connecting rod. This snap-fit ​​method is simpler to install and disassemble, and can improve the assembly efficiency of the connecting rod. At the same time, the elastic characteristics of the elastic claw can also buffer external impacts to a certain extent, further enhancing the stability of the connecting rod.

[0031] The implementation principle of this application embodiment is as follows: By setting two connecting plates 2 respectively close to both ends of the movable plate 1, the overall strength and deformation resistance of the connecting rod are greatly improved. When subjected to external impact, the connecting plates 2 can evenly distribute the stress, preventing deformation of the connecting rod and ensuring the reliability of the circuit breaker operating mechanism. At the same time, the detachable fixed part 21 and movable part 22, as well as multiple selectable snap-fit ​​positions, allow the connecting rod to adjust the spacing of the movable plates 1 according to actual needs, adapting to the connection of moving contacts of different sizes, thus improving the versatility and applicability of the connecting rod.

[0032] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A linkage of a circuit breaker operating mechanism, characterized in that, It includes two movable pieces (1) arranged in parallel and opposite directions, and at least two connecting pieces (2) are provided between the movable pieces (1), and the connecting pieces (2) are respectively arranged close to both ends of the movable pieces (1); The connecting rod also includes a fixed part (21) and a movable part (22). The fixed part (21) is fixedly connected to one of the movable pieces (1), and the movable part (22) is fixedly connected to the other movable piece (1). The fixed part (21) and the movable part (22) are connected by a detachable connection structure.

2. The linkage of a circuit breaker operating mechanism according to claim 1, characterized in that, The fixed part (21) and the movable part (22) are connected by a snap-fit ​​structure, which includes a buckle (211) provided on the fixed part (21) and a slot (221) provided on the movable part (22).

3. The linkage of a circuit breaker operating mechanism according to claim 2, characterized in that, The snap-fit ​​structure has multiple selectable snap-fit ​​positions along the longitudinal axis of the fixed part (21) or the movable part (22).

4. The linkage of a circuit breaker operating mechanism according to claim 3, characterized in that, The plurality of snap-fit ​​positions are arranged at intervals along the longitudinal axis of the fixing part (21).

5. The linkage of a circuit breaker operating mechanism according to claim 2, characterized in that, The buckle (211) is a protrusion, and the slot (221) is a recess that is adapted to the protrusion.

6. The linkage of a circuit breaker operating mechanism according to claim 1, characterized in that, Both the fixed part (21) and the movable part (22) are fixedly connected to the movable piece (1) by bolt assemblies.

7. The linkage of a circuit breaker operating mechanism according to claim 1, characterized in that, The two connecting pieces (2) are symmetrically arranged on both sides of the longitudinal center line of the movable piece (1).

8. The linkage of a circuit breaker operating mechanism according to claim 7, characterized in that, The connecting piece (2) and the movable piece (1) are integrally stamped and formed.

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