Limiting transmission mechanism of vacuum circuit breaker

Abstract

The utility model belongs to the technical field of vacuum circuit breakers, and particularly relates to a vacuum circuit breaker limiting transmission mechanism which comprises a vacuum circuit breaker shell and a servo motor installed on the outer side of the vacuum circuit breaker shell, the output end of the servo motor is connected with a rotating shaft, and the surface of one end of the rotating shaft is connected with a gear disc. The surface of the gear disc is connected with a gear plate; the servo motor is started to drive the gear disc on the surface of the rotating shaft to rotate, then the gear plate on the surface of the gear disc is driven to move downwards, the guide plate is driven to move downwards, and at the moment, the spring control mechanism at the bottom end of the connecting plate is driven to control and close the contact. At the moment, the guide block carries out stroke limiting along the guide groove in one side of the guide plate, the movement of the connecting plate is prevented from exceeding the stroke, it is guaranteed that no extra impact force is borne in the contact closing process, and the safety of the limiting transmission mechanism of the vacuum circuit breaker is improved.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum circuit breaker technology, specifically relating to a limit transmission mechanism for a vacuum circuit breaker. Background Technology

[0002] A vacuum circuit breaker is a high-voltage switchgear that uses a vacuum environment (gas pressure below 10⁻²Pa) as an arc-extinguishing and insulating medium. It is mainly used for control and protection circuits in power systems. In a vacuum environment, there are very few gas molecules. After an electric arc is generated, the metal vapor between the contacts (generated by the high temperature of the electric arc evaporating the contact material) diffuses and cools rapidly when the current crosses zero, which extinguishes the arc quickly and prevents the arc from reigniting.

[0003] The limit transmission mechanism of a vacuum circuit breaker is a key mechanical component. It connects the operating mechanism (such as a spring mechanism or a permanent magnet mechanism) with the moving contact of the vacuum interrupter, enabling precise transmission of opening and closing actions. The limit device ensures the accuracy of the contact movement trajectory, stroke, and position. The aforementioned electromagnetic operating mechanism and spring operating mechanism have many drawbacks. For example, in the spring operating mechanism, the spring is subjected to a long-term energy storage-release cycle load, which leads to a decrease in elastic modulus, causing the closing energy to decay, resulting in insufficient contact pressure and increased contact resistance. This leads to incomplete opening and closing of the contacts inside the vacuum circuit breaker, causing a short circuit in the vacuum circuit breaker. Utility Model Content

[0004] The purpose of this utility model is to provide a limit transmission mechanism for a vacuum circuit breaker, aiming to solve the many shortcomings of the existing limit transmission mechanisms for vacuum circuit breakers, such as electromagnetic operating mechanisms and spring operating mechanisms. For example, in the spring operating mechanism, the spring is subjected to long-term energy storage-release cyclic load, which leads to a decrease in elastic modulus, causing attenuation of closing energy, resulting in insufficient contact pressure and increased contact resistance. This leads to incomplete opening and closing of the contacts inside the vacuum circuit breaker, causing a short circuit in the vacuum circuit breaker.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum circuit breaker limit transmission mechanism, comprising a vacuum circuit breaker housing and a servo motor installed on the outside of the vacuum circuit breaker housing, wherein the output end of the servo motor is connected to a rotating shaft, a gear disk is connected to one end surface of the rotating shaft, and a gear plate is connected to the surface of the gear disk;

[0006] A guide plate is connected to the other side of the gear plate, a connecting plate is connected to one side of the guide plate, a positioning seat is connected to the bottom end of the connecting plate, a spring operating mechanism is connected to the bottom end of the positioning seat, a guide block is connected to the inner wall of the vacuum circuit breaker housing near the guide plate, and a guide groove is opened on the side of the guide plate near the guide block.

[0007] In a preferred embodiment of the vacuum circuit breaker limit transmission mechanism of this utility model, the rotating shaft passes through and extends into the interior of the vacuum circuit breaker housing, and the gear disk and gear plate constitute a gear meshing structure.

[0008] As a preferred embodiment of the vacuum circuit breaker limit transmission mechanism of this utility model, the guide block has a T-shaped structure, and the guide block and the guide groove on one side of the guide plate form a sliding connection structure.

[0009] In a preferred embodiment of the vacuum circuit breaker limiting transmission mechanism of this utility model, the bottom dimension of the connecting plate matches the opening dimension of the positioning seat surface, and the spring operating mechanism is in contact with the contacts inside the vacuum circuit breaker.

[0010] As a preferred embodiment of the vacuum circuit breaker limit transmission mechanism of this utility model, a movable rod is connected to one end of the positioning seat opening, a linkage plate is connected to the other end of the movable rod, a linkage spring is connected to one side of the linkage plate, and the other end of the linkage spring is connected to the inner wall of the positioning seat opening.

[0011] As a preferred embodiment of the vacuum circuit breaker limit transmission mechanism of this utility model, a locking plate is connected to the side of the linkage plate opposite to the linkage spring, and the locking plate and the bottom opening of the connecting plate form a fitting structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention starts a servo motor, which drives the gear disk on the surface of the rotating shaft to rotate, thereby driving the gear plate on the surface of the gear disk to move downward, and then driving the guide plate to move downward. At this time, the spring operating mechanism at the bottom of the connecting plate controls the closure of the contacts. Meanwhile, the guide block limits the travel along the guide groove on one side of the guide plate to prevent the connecting plate from moving beyond its travel range, ensuring that the contacts are not subjected to additional impact force during the closure process, thus improving the safety of the limit transmission mechanism of the vacuum circuit breaker. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of the vacuum circuit breaker housing of this utility model;

[0016] Figure 2 This is a schematic diagram of the guide plate installation structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the gear plate connection structure of this utility model;

[0018] Figure 4 This is an exploded view of the guide block structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the positioning seat installation structure of this utility model;

[0020] Figure 6 This is an enlarged structural diagram of point A of this utility model.

[0021] In the diagram: 1. Vacuum circuit breaker housing; 2. Servo motor; 3. Rotating shaft; 4. Gear disk; 5. Gear plate; 6. Guide plate; 7. Connecting plate; 8. Positioning seat; 9. Spring operating mechanism; 10. Guide block; 14. Guide groove; 15. Movable rod; 16. Linkage plate; 17. Linkage spring; 18. Locking plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 The present invention provides the following technical solution: a vacuum circuit breaker limit transmission mechanism, including a vacuum circuit breaker housing 1 and a servo motor 2 installed on the outside of the vacuum circuit breaker housing 1. The output end of the servo motor 2 is connected to a rotating shaft 3. A gear disk 4 is connected to one end surface of the rotating shaft 3. A gear plate 5 is connected to the surface of the gear disk 4.

[0024] A guide plate 6 is connected to the other side of the gear plate 5. A connecting plate 7 is connected to one side of the guide plate 6. A positioning seat 8 is connected to the bottom of the connecting plate 7. A spring operating mechanism 9 is connected to the bottom of the positioning seat 8. A guide block 10 is connected to the inner wall of the vacuum circuit breaker housing 1 near the guide plate 6. A guide groove 14 is opened on the side of the guide plate 6 near the guide block 10.

[0025] Preferably, the rotating shaft 3 passes through and extends into the interior of the vacuum circuit breaker housing 1, and the gear disk 4 and gear plate 5 form a gear meshing structure.

[0026] In practical use, the rotation of the gear disk 4 facilitates the movement of the gear plate 5, which in turn drives the connecting plate 7 to adjust up and down, making subsequent contact opening and closing operations easier.

[0027] Preferably, the guide block 10 has a T-shaped structure, and the guide block 10 and the guide groove 14 on one side of the guide plate 6 form a sliding connection structure.

[0028] In practical use, by sliding the guide block 10 along the guide groove 14, the connecting plate 7 can be easily moved up and down in a directional manner.

[0029] Preferably, the bottom dimension of the connecting plate 7 matches the opening dimension of the positioning seat 8, and the spring operating mechanism 9 is in contact with the contacts inside the vacuum circuit breaker.

[0030] In practical use, the spring operating mechanism 9 is mainly driven by an electric motor or a manual energy storage device to convert electrical energy or manual mechanical energy into the elastic potential energy of the spring. When a closing command is received, the closing electromagnet or manual closing button of the operating mechanism is activated, releasing the mechanical lock of the energy storage spring. The opening electromagnet or manual opening button is activated, releasing the lock of the opening spring. The opening spring quickly extends, pushing the moving contact to move in the opening direction. The moving contact quickly separates, and the vacuum interrupter generates an arc and quickly extinguishes it. At the same time, the transmission mechanism ensures the accurate opening position of the contact through the limit device, preparing for the next closing.

[0031] Preferably, a movable rod 15 is connected to one end of the positioning seat 8, a linkage plate 16 is connected to the other end of the movable rod 15, a linkage spring 17 is connected to one side of the linkage plate 16, and the other end of the linkage spring 17 is connected to the inner wall of the opening of the positioning seat 8.

[0032] In practical use, by pulling the movable rod 15, the linkage plate 16 is driven to squeeze the linkage spring 17, which in turn drives the clamping plate 18 to move quickly.

[0033] Preferably, a locking plate 18 is connected to one side of the linkage plate 16 relative to the linkage spring 17, and the locking plate 18 and the bottom opening of the connecting plate 7 form a fitting structure.

[0034] In practical use, by rebounding the linkage spring 17, the locking plate 18 on one side of the linkage plate 16 is driven to engage with the locking groove on the bottom side of the connecting plate 7, thereby facilitating the quick and stable locking of the limit transmission mechanism.

[0035] The working principle of this utility model is as follows: By starting the servo motor 2, the gear disk 4 on the surface of the rotating shaft 3 is rotated, which in turn drives the gear plate 5 on the surface of the gear disk 4 to move downward, which in turn drives the guide plate 6 to move downward. At this time, the spring operating mechanism 9 at the bottom of the connecting plate 7 controls the closure of the contacts. At this time, the guide block 10 is limited along the guide groove 14 on one side of the guide plate 6. In addition, the servo motor 2 is started in reverse, which drives the gear disk 4 to reverse, which in turn drives the connecting plate 7 to rise, thereby facilitating the opening of the contacts inside the vacuum circuit breaker, avoiding the connecting plate 7 from overtravel, ensuring that the contacts are not subjected to additional impact force during the closure process, and improving the safety of the limit transmission mechanism of the vacuum circuit breaker.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A limit transmission mechanism for a vacuum circuit breaker, comprising a vacuum circuit breaker housing (1) and a servo motor (2) mounted on the outside of the vacuum circuit breaker housing (1), characterized in that: The output end of the servo motor (2) is connected to a rotating shaft (3), and a gear disk (4) is connected to one end surface of the rotating shaft (3). A gear plate (5) is connected to the surface of the gear disk (4). A guide plate (6) is connected to the other side of the gear plate (5), a connecting plate (7) is connected to one side of the guide plate (6), a positioning seat (8) is connected to the bottom end of the connecting plate (7), a spring operating mechanism (9) is connected to the bottom end of the positioning seat (8), a guide block (10) is connected to the inner wall of the vacuum circuit breaker housing (1) near the guide plate (6), and a guide groove (14) is provided on the side of the guide plate (6) near the guide block (10).

2. The vacuum circuit breaker limit transmission mechanism according to claim 1, characterized in that: The rotating shaft (3) passes through and extends into the interior of the vacuum circuit breaker housing (1), and the gear disk (4) and gear plate (5) form a gear meshing structure.

3. The limit transmission mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The guide block (10) has a T-shaped structure, and the guide block (10) and the guide groove (14) on one side of the guide plate (6) form a sliding connection structure.

4. The vacuum circuit breaker limit transmission mechanism according to claim 1, characterized in that: The bottom dimension of the connecting plate (7) matches the opening dimension of the positioning seat (8), and the spring operating mechanism (9) is in contact with the contacts inside the vacuum circuit breaker.

5. The limit transmission mechanism for a vacuum circuit breaker according to claim 1, characterized in that: A movable rod (15) is connected to one end of the positioning seat (8), and a linkage plate (16) is connected to the other end of the movable rod (15). A linkage spring (17) is connected to one side of the linkage plate (16), and the other end of the linkage spring (17) is connected to the inner wall of the opening of the positioning seat (8).

6. The vacuum circuit breaker limit transmission mechanism according to claim 5, characterized in that: The linkage plate (16) is connected to a locking plate (18) on one side relative to the linkage spring (17), and the locking plate (18) and the bottom opening of the connecting plate (7) form a fitting structure.

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