Quick-break circuit breaker operating mechanism
By designing an instantaneous circuit breaker operating mechanism and employing an electromagnetic coil actuator and reset assembly, rapid closing and opening are achieved, solving the problems of large closing current, long closing time, and high mechanical failure rate of traditional electromagnetic mechanisms, and achieving the effects of rapid operation and self-reset.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional circuit breaker operating mechanisms are mainly divided into pneumatic, hydraulic, spring energy storage and electromagnetic mechanisms. However, electromagnetic mechanisms have problems such as large closing current, need for dedicated DC power supply, long closing time and high mechanical failure rate of the latching system, resulting in significant risks of failure to operate/false operation.
Design a fast-acting circuit breaker operating mechanism that uses an electromagnetic coil actuator and a reset assembly to achieve rapid closing and opening operations. The electromagnetic coil drives the closing and opening levers, and the automatic reset function of the reset assembly achieves the effect of rapid closing and opening.
It achieves a closing time of ≤30ms and a opening time of ≤20ms. The coil is electrically pushed out and mechanically self-reset, reducing the risk of mechanical failure.
Smart Images
Figure CN121601508A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of circuit breakers, and in particular to an operating mechanism for a fast-acting circuit breaker. Background Technology
[0002] Traditional circuit breaker operating mechanisms are mainly divided into four categories: pneumatic, hydraulic, spring energy storage and electromagnetic mechanisms. However, electromagnetic mechanisms have significant limitations: the closing current is extremely high (up to hundreds of amperes), requiring a dedicated DC power supply, the closing time is long, and the locking system has a high mechanical failure rate, resulting in a significant risk of failure to operate or maloperation.
[0003] Therefore, it is necessary to design an instantaneous circuit breaker operating mechanism. Summary of the Invention
[0004] The technical problem to be solved by this invention is that traditional circuit breaker operating mechanisms are mainly divided into four categories: pneumatic, hydraulic, spring energy storage and electromagnetic mechanisms. However, electromagnetic mechanisms have significant limitations: the closing current is extremely high (up to hundreds of amperes), a dedicated DC power supply is required, the closing time is long, and the mechanical failure rate of the latching system is high, with a significant risk of failure to operate / false operation.
[0005] To solve the above-mentioned technical problems, the present invention provides a fast-acting circuit breaker operating mechanism, the operating mechanism including a mechanism base, on which two sets of electromagnetic coil actuators are fixedly installed, referred to as closing actuators and opening actuators respectively. The mechanism base also has a closing shaft and an opening shaft installed, a closing lever installed on the closing shaft, and an opening lever installed on the opening shaft. The opening actuator is opposite to the opening lever, and the closing lever is opposite to the closing actuator. A reset assembly is provided on the top of the mechanism base.
[0006] The electromagnetic coil actuator consists of a housing, a push rod, and an electromagnetic coil. The electromagnetic coil is wound inside the housing, and the push rod is inserted in the middle of the electromagnetic coil. A return spring is provided between the housing and the push rod.
[0007] Both the closing and opening shafts are equipped with knobs.
[0008] The reset assembly includes a drive shaft mounted on a mechanism base. A reset component A is mounted on the drive shaft and is located on the side of the closing actuator. A reset component B is rotatably mounted on the mechanism base and is located on the side of the opening actuator. A connecting component connects the reset component A and the reset component B.
[0009] The beneficial effects of this invention are as follows: When the closing actuator is energized, its push rod pushes the closing lever on the closing shaft. The closing lever then rotates the closing shaft, completing the closing operation. When the opening actuator is energized, its push rod pushes the opening lever on the opening shaft. The opening lever then rotates the opening shaft, completing the opening operation. Due to the reset component, the closing shaft rotates the closing lever, pushing the push rod of the closing actuator back, achieving automatic reset. When the mechanism closes, the drive shaft, through the connecting piece, drives the reset component B to rotate clockwise, resetting the opening actuator. During this process, the reset component A also rotates clockwise with the drive shaft to its original position. When the mechanism opens, the reset component A rotates counterclockwise with the drive shaft, resetting the closing actuator. During this process, the drive shaft, through the connecting piece, drives the reset component B to rotate counterclockwise back to its original position. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0011] In the diagram: 1. Mechanism base; 2. Closing actuator; 3. Opening actuator; 4. Closing shaft; 5. Opening shaft; 6. Closing lever; 7. Opening lever; 8. Push rod; 9. Return spring; 10. Drive shaft; 11. Returning component A; 12. Returning component B; 13. Connecting component. Detailed Implementation
[0012] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.
[0013] Please see Figure 1 The operating mechanism includes a mechanism base 1, on which two sets of electromagnetic coil actuators are fixedly installed, referred to as closing actuator 2 and opening actuator 3 respectively. The mechanism base 1 is also equipped with a closing shaft 4 and an opening shaft 5. A closing lever 6 is installed on the closing shaft 4, and an opening lever 7 is installed on the opening shaft 5. The opening actuator 3 is opposite to the opening lever 7, and the closing lever 6 is opposite to the closing actuator 2. A reset assembly is provided on the top of the mechanism base 1.
[0014] The electromagnetic coil actuator consists of a housing, a push rod 8, and an electromagnetic coil. The electromagnetic coil is wound inside the housing, and the push rod 8 is inserted in the middle of the electromagnetic coil. A return spring 9 is provided between the housing and the push rod 8.
[0015] Both the closing shaft 4 and the opening shaft 5 are equipped with knobs.
[0016] The reset assembly includes a drive shaft 10, which is mounted on a mechanism base 1. A reset component A11 is mounted on the drive shaft 10 and is located on the side of the closing push component 2. A reset component B12 is rotatably mounted on the mechanism base 1 and is located on the side of the opening push component 3. A connecting component 13 connects the reset component A11 and the reset component B12.
[0017] When the closing actuator is energized, its push rod pushes the closing lever on the closing shaft. The closing lever then rotates the closing shaft, completing the closing operation. When the opening actuator is energized, its push rod pushes the opening lever on the opening shaft. The opening lever then rotates the opening shaft, completing the opening operation. Due to the action of the reset component, the closing shaft rotates the closing lever, which pushes the push rod of the closing actuator back, achieving an automatic reset.
[0018] When the mechanism closes, the drive shaft 10 drives the reset component B12 to rotate clockwise through the connector 13, thereby resetting the opening push component 3. During this process, the reset component A11 also rotates clockwise with the drive shaft 10 to its original position. When the mechanism opens, the reset component A11 rotates counterclockwise with the drive shaft 10, thereby resetting the closing push component 2. During this process, the drive shaft 10 drives the reset component B12 to rotate counterclockwise back to its original position through the connector 13.
[0019] The operating mechanism of the instantaneous circuit breaker in this scheme can achieve a closing time of ≤30ms and a opening time of ≤20ms. The coil is electrically pushed out and mechanically self-reset.
[0020] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A fast-acting circuit breaker operating mechanism, characterized in that: The operating mechanism includes a mechanism base (1), on which two sets of electromagnetic coil actuators are fixedly installed, which are respectively referred to as closing actuator (2) and opening actuator (3). The mechanism base (1) is also equipped with a closing shaft (4) and an opening shaft (5). A closing lever (6) is installed on the closing shaft (4), and an opening lever (7) is installed on the opening shaft (5). The opening actuator (3) is opposite to the opening lever (7), and the closing lever (6) is opposite to the closing actuator (2). A reset component is provided on the top of the mechanism base (1).
2. The instantaneous circuit breaker operating mechanism according to claim 1, characterized in that: The electromagnetic coil actuator consists of a housing, a push rod (8), and an electromagnetic coil. The electromagnetic coil is wound inside the housing, and the push rod (8) is inserted in the middle of the electromagnetic coil. A return spring (9) is provided between the housing and the push rod (8).
3. The instantaneous circuit breaker operating mechanism according to claim 1, characterized in that: Both the closing shaft (4) and the opening shaft (5) are equipped with knobs.
4. The instantaneous circuit breaker operating mechanism according to claim 1, characterized in that: The reset assembly includes a drive shaft (10), which is mounted on a mechanism base (1). A reset component A (11) is mounted on the drive shaft (10), which is located on the side of the closing push component (2). A reset component B (12) is rotatably mounted on the mechanism base (1), which is located on the side of the opening push component (3). A connecting component (13) connects the reset component A (11) and the reset component B (12).