Circuit breaker drive and circuit breaker system

Abstract

The utility model relates to a kind of circuit breaker transmission device and circuit breaker system, the device includes operating mechanism;First elbow arm mechanism, first elbow arm mechanism is rotatably connected with operating mechanism, first elbow arm mechanism can be driven by operating mechanism and rotate around first direction;Insulating pull rod, one end of insulating pull rod is rotatably connected with first elbow arm mechanism;Guide mechanism, guide mechanism includes guide seat and with the guide rod assembly being movably arranged in guide seat, one end of guide rod assembly is connected with insulating pull rod;Second elbow arm mechanism, one end of second elbow arm mechanism is rotatably connected with guide rod assembly, the other end is used to be rotatably connected with the compression chamber connecting plate of circuit breaker, second elbow arm mechanism can be driven by guide rod assembly and rotate around second direction.The device can solve the problem that elbow arm mechanism rotating shaft direction is inconsistent, overcome the torsional force impact of large rotational inertia to rotating insulating pull rod, greatly improve the mechanical performance of transmission system, significantly improve the mechanical life of transmission system.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to circuit breaker drive devices and circuit breaker systems. Background Technology

[0002] In some specialized power applications, such as generator outlet switches in pumped storage power stations, the operating frequency of the switches is high, and the mechanical life of the switches is typically required to exceed 20,000 cycles. This places high demands on the reliability of the transmission system. Traditional circuit breakers use direct-acting or rotary transmission devices to open / close the circuit breaker body. However, in direct-acting transmission devices, the rotation axes of the upper and lower transmission cranks are in the same direction. The direct-acting transmission structure cannot adapt to the problem of inconsistent rotation axes caused by changes in the swing angle of the upper and lower transmission cranks. Furthermore, traditional rotary transmission systems need to overcome the torsional impact caused by large rotational inertia, which significantly reduces mechanical performance and fails to meet user requirements for mechanical life. Utility Model Content

[0003] Therefore, it is necessary to provide a circuit breaker transmission device and circuit breaker system that can overcome the inconsistency in the swing angle direction of the upper and lower transmission crank arms, overcome torsional impact, and have a long mechanical life in order to address the above problems.

[0004] In a first aspect, this utility model provides a circuit breaker drive device, comprising:

[0005] Operating mechanism;

[0006] The first crank arm mechanism is rotatably connected to the operating mechanism and can rotate around a first direction under the drive of the operating mechanism.

[0007] An insulating pull rod, one end of which is rotatably connected to the first crank arm mechanism;

[0008] A guiding mechanism, comprising a guide seat and a guide rod assembly movably disposed on the guide seat, one end of the guide rod assembly being connected to an insulating pull rod;

[0009] The second crank arm mechanism has one end rotatably connected to the guide rod assembly and the other end rotatably connected to the compressor chamber connecting plate of the circuit breaker. The second crank arm mechanism can rotate around the second direction under the drive of the guide rod assembly to drive the compressor chamber connecting plate to switch the circuit breaker to the closed or open state. The first direction and the second direction are set at an angle.

[0010] In one embodiment, the circuit breaker actuator further includes a housing and a base;

[0011] The outer cover is connected to the base to form a cavity for housing the circuit breaker. The first crank arm mechanism, the insulating tie rod, the guide mechanism, and the second crank arm mechanism are all located inside the cavity.

[0012] In one embodiment, the guide rod assembly includes a guide joint and an inner drive connecting plate; the second crank arm mechanism includes an inner drive crank arm;

[0013] One end of the guide joint is connected to the insulating tie rod, and the other end of the guide joint is connected to one end of the inner transmission connecting plate. The other end of the inner transmission connecting plate is rotatably connected to the inner transmission crank arm.

[0014] In one embodiment, the first crank arm mechanism includes an outer crank arm with external transmission, a drive shaft, and an inner crank arm with external transmission.

[0015] One end of the outer crank arm of the outer drive is rotatably connected to the operating mechanism, and the other end of the outer crank arm of the outer drive is connected to one end of the inner crank arm of the outer drive through the drive shaft. The other end of the inner crank arm of the outer drive is rotatably connected to the insulating pull rod.

[0016] In one embodiment, the operating mechanism includes an operating mechanism connector and an operating mechanism connecting plate;

[0017] One end of the operating mechanism connecting plate is connected to the operating mechanism connecting head, and the other end is rotatably connected to the external transmission outer crank arm.

[0018] In one embodiment, the rotation axis direction of the outer drive inner crank arm is a first direction, and the rotation axis direction of the inner drive crank arm is a second direction, with the first direction being perpendicular to the second direction.

[0019] In one embodiment, the direction of movement of the inner drive connecting plate is perpendicular to the direction of rotation of the inner crank arm of the outer drive.

[0020] In one embodiment, the circuit breaker actuation device further includes supporting insulation and a moving-side housing;

[0021] The supporting insulating component is connected to the moving side housing;

[0022] The air chamber connecting plate is located inside the moving side housing. The air chamber connecting plate moves in conjunction with the air chamber and is connected to the internal transmission crank arm.

[0023] In one embodiment, the operating mechanism further includes an operating mechanism chamber connected to a support insulation member, and a first crank arm mechanism is disposed within the operating mechanism chamber.

[0024] Secondly, the present invention provides a circuit breaker system, which includes a circuit breaker drive device according to any of the above embodiments.

[0025] The aforementioned circuit breaker transmission device achieves opening and closing operations through a direct-drive transmission structure of the guide mechanism and the second crank arm mechanism. It converts and constrains the rotational motion of the first crank arm mechanism about a first direction into linear motion of the guide mechanism via an insulating pull rod, while simultaneously converting the pure linear motion of the guide mechanism back into rotational motion of the second crank arm mechanism about a second direction. Therefore, the circuit breaker transmission device of this application converts the rotational motion of the first crank arm mechanism about a first direction into linear motion of the guide rod assembly, and then converts the linear motion into rotational motion of the second crank arm mechanism about a second direction, achieving decoupling and conversion of motion forms. This solves the problem of inconsistent rotational axis directions of the transmission crank arm in the prior art, overcomes the torsional impact on the rotating insulating pull rod caused by large rotational inertia, significantly improves the mechanical performance of the transmission system, and significantly extends the mechanical life of the transmission system. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of a circuit breaker drive device according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a circuit breaker according to an embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of a circuit breaker drive device according to another embodiment of the present invention.

[0029] Figure label:

[0030] 10. Operating mechanism; 110. Operating mechanism connector; 120. Operating mechanism connecting plate; 130. Operating mechanism chamber; 20. First crank arm mechanism; 210. Outer crank arm of external transmission; 220. Drive shaft; 230. Inner crank arm of external transmission; 30. Insulating tie rod; 40. Guide mechanism; 410. Guide seat; 420. Guide rod assembly; 421. Guide joint; 422. Inner transmission connecting plate; 50. Second crank arm mechanism; 510. Inner transmission crank arm; 60. Compressed air chamber connecting plate; 61. Supporting insulating component; 62. Moving side housing; 63. Compressed air chamber; 70. Outer cover; 80. Base; 90. Three-phase circuit breaker body; 100. Three-phase transmission system. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] High-voltage switches have very high opening and closing speeds, which places higher demands on the reliability of the transmission system. This is especially true in some special power fields, such as the generator outlet switches of pumped storage power stations, where the operating frequency is high and the mechanical life of the switches is usually required to be more than 20,000 cycles. Therefore, the design of the transmission system is crucial.

[0038] Traditional circuit breakers use a hydraulic mechanism to drive three-phase mechanical linkage. This mechanism connects to the circuit breaker body via output rods, crank arms, and transmission links. The mechanism's movement drives the circuit breaker to open and close. However, in direct-drive circuits, the rotation axes of the upper and lower transmission crank arms are typically in the same direction, with the transmission links connected vertically, resulting in a parallelogram-shaped trajectory. But if the rotation axes of the upper and lower transmission crank arms intersect at any angle or are perpendicular (90°), a rotary transmission method is usually used. In three-pole circuit breakers, the operating mechanism uses a three-phase linkage transmission system that is perpendicular to the three-phase circuit breaker body. Directly using a traditional rotary transmission system requires the rotary transmission system to overcome the torsional impact on the rotating insulating rod caused by the large moment of inertia, significantly reducing mechanical performance and failing to meet user requirements for mechanical lifespan.

[0039] In view of this, the present invention provides a circuit breaker transmission device. By improving the motion structure of the inner crank arm in the transmission system and utilizing the structural design of adding a guide mechanism between the inner crank arm and the transmission link, the transmission system overcomes the problem of inconsistent crank arm swing angle direction during direct transmission.

[0040] In one exemplary embodiment, such as Figure 1 As shown, a circuit breaker transmission device is provided, including an operating mechanism 10, a first crank arm mechanism 20, an insulating pull rod 30, a guide mechanism 40, and a second crank arm mechanism 50.

[0041] Optionally, the operating mechanism 10 serves as a power source to receive opening and closing operation commands (such as from a motor or manual energy storage mechanism) and drive the first crank arm mechanism 20 to work.

[0042] The first crank arm mechanism 20 is rotatably connected to the operating mechanism 10, and the first crank arm mechanism 20 can rotate around the first direction under the drive of the operating mechanism 10.

[0043] Optionally, one end of the first crank arm mechanism 20 is rotatably connected to the operating mechanism 10, forming a rotary pair. Under the direct drive of the operating mechanism 10, the first crank arm mechanism 20 can reciprocate in a rotational motion around a first direction. The first direction refers to the direction of the rotation axis of the first crank arm mechanism 20.

[0044] One end of the insulating pull rod 30 is rotatably connected to the first crank arm mechanism 20.

[0045] Optionally, one end of the insulating rod 30 is rotatably connected to one end of the first crank arm mechanism 20 via a revolute joint (such as a pin) to receive the rotational motion output by the first crank arm mechanism 20. The insulating rod 30 itself has excellent electrical insulation performance, which is crucial in high-voltage circuit breaker environments, effectively isolating high and low potential areas, while longitudinally transmitting the motion of the first crank arm mechanism 20 to the guide mechanism 40.

[0046] The guiding mechanism 40 includes a guide seat 410 and a guide rod assembly 420 movably disposed on the guide seat 410, one end of the guide rod assembly 420 being connected to the insulating pull rod 30.

[0047] Optionally, the guide mechanism 40, as a core transmission component, includes a fixedly mounted guide seat 410 and a guide rod assembly 420. The guide rod assembly 420 is movably disposed within the guide seat 410 and is constrained to move on a linear track defined by the guide seat 410 (e.g., via a linear bearing or precision sliding fit). The guide rod assembly 420 is connected to the other end of the insulating pull rod 30, thereby receiving the force and movement transmitted by the insulating pull rod 30.

[0048] One end of the second crank arm mechanism 50 is rotatably connected to the guide rod assembly 420, and the other end is rotatably connected to the air chamber connecting plate 60 of the circuit breaker. The second crank arm mechanism 50 can rotate around the second direction under the drive of the guide rod assembly 420 to drive the air chamber connecting plate 60 to switch the circuit breaker to the closed state or the open state, wherein the first direction and the second direction are set at an angle.

[0049] Optionally, one end of the second crank arm mechanism 50 is rotatably connected to the guide rod assembly 420 of the guide mechanism 40, and the other end is rotatably connected to the compressor chamber connecting plate 60. Under the linear drive of the guide rod assembly 420, the second crank arm mechanism 50 can reciprocate around a second direction different from the first direction, and ultimately realize the switching of the circuit breaker moving contact system between open and closed states through the compressor chamber connecting plate 60. The rotation axis direction of the second crank arm mechanism 50 is the second direction. The first direction and the second direction are set at a spatial angle, which can be any angle.

[0050] The first-direction rotational motion (longitudinal rotational motion) of the first crank arm mechanism 20 driven by the operating mechanism 10 is transmitted to the guide mechanism 40 via the insulating pull rod 30. The core function of the guide mechanism 40 is to accurately convert and constrain this rotational motion into a unidirectional linear motion of the guide rod assembly 420. This conversion process effectively overcomes the longitudinal sway angle problem of the first crank arm mechanism 20 caused by long stroke or large angle swing. The pure linear motion output by the guide mechanism 40 directly pushes the second crank arm mechanism 50 through the guide rod assembly 420. The latter then efficiently converts this linear push / pull force back into rotational motion. This direct "linear-rotational" conversion mechanism allows the second crank arm mechanism 50 to mainly perform the required second-direction rotational motion (lateral rotational motion), fundamentally overcoming the lateral sway angle problem of the internal transmission crank arm in traditional transmission. This device uses the linear motion of the guide mechanism 40 as a "motion decoupling device" to achieve indirect and stable transmission between two rotational motion forms at an angle, completely solving the spatial layout and motion interference problems caused by inconsistent rotation axis directions.

[0051] The aforementioned circuit breaker transmission device achieves opening and closing operations through the direct-drive transmission structure of the guide mechanism 40 and the second crank arm mechanism 50. The insulating pull rod 30 converts and constrains the rotational motion of the first crank arm mechanism 20 around a first direction into the linear motion of the guide mechanism 40, while simultaneously converting the purely linear motion of the guide mechanism 40 back into the rotational motion of the second crank arm mechanism 50, directly driving the second crank arm mechanism 50 to rotate around a second direction. This three-stage motion conversion (longitudinal rotation → purely linear → lateral rotation), through the crucial role of the guide mechanism 40, greatly optimizes the force state and motion trajectory of the entire transmission chain. The transmission system operates more smoothly and reliably, effectively isolating adverse forces (torsion and lateral bending force) in different directions, thereby significantly improving the overall mechanical performance and system rigidity. This not only improves the accuracy and speed response of the circuit breaker's operation but also significantly reduces the wear and fatigue accumulation of transmission components, thus significantly extending the mechanical life and operational reliability of the circuit breaker transmission system, making it particularly suitable for applications requiring high voltage, high current, frequent operation, or long service life.

[0052] In one exemplary embodiment, such as Figure 2 As shown, the circuit breaker drive also includes an outer cover 70 and a base 80.

[0053] The outer cover 70 is connected to the base 80 to form a cavity for accommodating the circuit breaker. The first crank arm mechanism 20, the insulating tie rod 30, the guide mechanism 40, and the second crank arm mechanism 50 are all disposed in the cavity.

[0054] For example, Figure 2The system also includes a three-phase circuit breaker body 90 and a three-phase drive system 100. The operating mechanism 10, the three-phase circuit breaker body 90, the outer casing 70, and the three-phase drive system 100 are mounted on the base 80. The operating mechanism 10 is arranged on one side of the circuit breaker and transmits energy to the three-phase circuit breaker body 90 through three connecting rods to perform closing and opening operations. At this time, the energy of the operating mechanism 10 is a transverse direct drive, while the three phases of the three-phase circuit breaker body 90 are arranged longitudinally. The operating mechanism 10 and the three-phase drive system 100 intersect at 90°.

[0055] For example, the base 80, serving as the mounting reference surface for the entire transmission device, can be formed by high-strength metal casting or welding. The outer cover 70, a high-strength protective cover covering the base 80, can be made of stamped or cast metal sheet, with its edge contours achieving a sealed connection with the base 80. The surface of the outer cover 70 can be equipped with observation windows, pressure relief devices, and necessary maintenance and inspection port covers. When the outer cover 70 and the base 80 are firmly combined, they together form a closed or semi-closed rigid cavity. This cavity can be used to safely house the main structure of the circuit breaker (including the transmission device, air chamber, and other components), providing a physical isolation barrier for the internal operating environment. The operating mechanism 10, serving as the power source, can be installed externally or partially embedded within the cavity, depending on the specific design. The outer cover 70 effectively prevents external dust, moisture, corrosive gases, and other contaminants from entering the transmission system, preventing key moving parts (such as the crank arm mechanisms and guide rod assemblies 420) from rusting, jamming, or abnormal wear. When the circuit breaker is broken, the outer casing 70 can form a physical isolation layer to block the high-temperature airflow and the impact of breaking debris on the internal transmission chain.

[0056] In one exemplary embodiment, such as Figure 1 As shown, the guide rod assembly 420 includes a guide joint 421 and an inner transmission connecting plate 422; the second crank arm mechanism 50 includes an inner transmission crank arm 510.

[0057] One end of the guide joint 421 is connected to the insulating pull rod 30, and the other end of the guide joint 421 is connected to one end of the inner transmission connecting plate 422. The other end of the inner transmission connecting plate 422 is rotatably connected to the inner transmission crank arm 510.

[0058] For example, the guide joint 421 can be a rod-shaped joint forged from a high-strength alloy, with one end rotatably connected to the insulating tie rod 30 degrees of freedom. The guide joint 421 can slide linearly within the guide seat 410. The inner transmission connecting plate 422 can be a rigid connecting rod that has undergone heat treatment and tempering. One end of the rod is fixed to the other end of the guide joint 421 without gaps, ensuring lossless transmission of linear thrust. The other end is provided with a bearing mounting position, forming a low-friction rotating pair with the inner transmission crank arm 510. The surface of the inner transmission connecting plate 422 is shot-peened to significantly improve its bending fatigue strength. The inner transmission crank arm 510 can be made of cast steel, with a waist-shaped adjustment groove machined at the working end. The connection with the compressor chamber connecting plate 60 can be a gap-free structure using a spherical bearing and a preload spring.

[0059] In one exemplary embodiment, such as Figure 1 As shown, the first crank arm mechanism 20 includes an outer crank arm 210 for external transmission, a transmission shaft 220 and an inner crank arm 230 for external transmission.

[0060] One end of the outer crank arm 210 is rotatably connected to the operating mechanism 10, and the other end of the outer crank arm 210 is connected to one end of the inner crank arm 230 via the drive shaft 220. The other end of the inner crank arm 230 is rotatably connected to the insulating pull rod 30.

[0061] For example, the operating mechanism 10 outputs torque, which is introduced into the rotational motion by the outer drive outer crank arm 210. Then, the drive shaft 220 passes through the protective partition to realize power transmission, and the rotational motion is converted into linear drive of the insulated pull rod 30 by the outer drive inner crank arm 230.

[0062] In the above embodiments, by adopting a direct-drive transmission structure with an inner transmission connecting plate 422 and a guide joint 421, i.e., the connection scheme between the inner transmission crank arm 510, the insulating pull rod 30, the guide joint 421, the guide seat 410 and the inner transmission connecting plate 422, the energy transfer between the outer transmission inner crank arm 230 and the inner transmission crank arm 510 is realized. The insulating pull rod 30 connected to the lower end of the guide joint 421 converts the rotational motion of the outer transmission inner crank arm 210 into the linear motion of the guide joint 421, which can overcome the longitudinal sway angle problem of the outer transmission inner crank arm 230. At the same time, the pure linear motion of the inner transmission connecting plate 422 connected to the upper end of the guide joint 421 is converted back into rotational motion and directly drives the inner transmission crank arm 510 to perform lateral rotational motion, which can overcome the lateral sway angle problem of the inner transmission crank arm 510. This design converts the rotational motion of the outer crank arm mechanism around the first direction into the linear motion of the guide rod assembly, and then converts the linear motion into the rotational motion of the inner crank arm mechanism around the second direction. This achieves the decoupling and conversion of motion forms, thereby solving the problem of inconsistent rotational axis directions of the transmission crank arm in the prior art. It also overcomes the torsional impact on the rotating insulating rod caused by the large moment of inertia, significantly improves the mechanical performance of the transmission system, and significantly extends the mechanical life of the transmission system.

[0063] In one exemplary embodiment, such as Figure 1 As shown, the operating mechanism 10 includes an operating mechanism connector 110 and an operating mechanism connecting plate 120.

[0064] One end of the operating mechanism connecting plate 120 is connected to the operating mechanism connector 110, and the other end is rotatably connected to the external transmission crank arm 210.

[0065] For example, the operating mechanism 10 adopts a modular connection structure. The operating mechanism connector 110 can be made of high-strength alloy steel through precision forging and tempering heat treatment, and has a standardized interface structure. The surface is phosphated to improve corrosion resistance. The operating mechanism connecting plate 120 can be CNC machined from high-strength aluminum alloy, which is lightweight and has high rigidity. Reinforcing ribs are added in the stress concentration areas of the plate. This ensures transmission reliability while improving operating accuracy and ease of maintenance.

[0066] In one exemplary embodiment, such as Figure 1 As shown, the rotation direction of the inner crank arm 230 of the outer transmission is the first direction, and the rotation direction of the inner crank arm 510 is the second direction. The first direction and the second direction are perpendicular.

[0067] For example, when the angle between the outer drive inner crank arm 230 and the inner drive crank arm 510 is 90° (i.e., orthogonal), the circuit breaker drive device can achieve precise conversion of different dimensional motion forms. The rotation axis of the outer drive inner crank arm 230 extends along a first direction to form a longitudinal rotation plane; the rotation axis of the inner drive crank arm 510 extends along a second direction to form a transverse rotation plane.

[0068] In one exemplary embodiment, the moving direction of the inner transmission connecting plate 422 is perpendicular to the rotation axis direction of the outer transmission inner crank arm 230.

[0069] For example, the linear motion direction of the inner transmission connecting plate 422 is spatially perpendicular to the rotation axis direction of the outer transmission inner crank arm 230, and coplanar perpendicular to the rotation axis direction of the inner transmission crank arm 510.

[0070] In one exemplary embodiment, such as Figure 1 As shown, the circuit breaker drive device also includes a supporting insulating member 61 and a moving side housing 62. The supporting insulating member 61 is connected to the moving side housing 62; the air chamber connecting plate 60 is located inside the moving side housing 62, the air chamber connecting plate 60 is movablely engaged with the air chamber, and is connected to the inner drive crank arm 510.

[0071] For example, the supporting insulating member 61 can be vacuum cast from insulating materials such as epoxy resin / alumina composite to form a sealed connection with the moving side housing 62, providing mechanical support and ensuring high and low potential isolation.

[0072] The compressor chamber connecting plate 60 is located in the airtight cavity of the moving side housing 62. It is connected to the compressor chamber piston via a crosshead connection and to the inner drive crank arm 510 via an insulated drive shaft. An angle compensation mechanism can be installed. The moving side housing 62 achieves dynamic sealing of the compressor chamber and rigid transmission of transmission force.

[0073] In one exemplary embodiment, such as Figure 1 As shown, the operating mechanism also includes an operating mechanism chamber 130, which is connected to the support insulation member 61, and the first crank arm mechanism 10 is disposed in the operating mechanism chamber 130.

[0074] For example, the operating mechanism compartment 130 adopts a closed metal shell structure, which is rigidly connected to the supporting insulation component 61 to form a complete power transmission channel, centrally encapsulating the power conversion unit and significantly optimizing the overall space utilization. The shell is equipped with a shock-absorbing bracket to effectively isolate the influence of external mechanical vibration on the operating mechanism, and also has the functions of dustproof, moisture-proof and foreign object intrusion prevention.

[0075] In one exemplary embodiment, Figure 3 This is a cross-sectional view of the circuit breaker drive mechanism from another direction, including the air compressor chamber 63, and... Figure 1 The circuit breaker drive device has the same structure.

[0076] In one exemplary embodiment, this application also provides a circuit breaker system that includes the circuit breaker drive device as described in any of the above embodiments.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A circuit breaker drive device, characterized in that, include: Operating mechanism; A first crank arm mechanism is rotatably connected to the operating mechanism, and the first crank arm mechanism is capable of rotating around a first direction under the drive of the operating mechanism; An insulating pull rod, one end of which is rotatably connected to the first crank arm mechanism; A guiding mechanism, the guiding mechanism including a guide seat and a guide rod assembly movably disposed on the guide seat, one end of the guide rod assembly being connected to the insulating pull rod; The second crank arm mechanism has one end rotatably connected to the guide rod assembly and the other end rotatably connected to the compressor chamber connecting plate of the circuit breaker. The second crank arm mechanism can rotate around the second direction under the drive of the guide rod assembly to drive the compressor chamber connecting plate to switch the circuit breaker to the closed state or the open state, wherein the first direction and the second direction are set at an angle.

2. The circuit breaker drive device according to claim 1, characterized in that, The circuit breaker drive device also includes an outer casing and a base; The outer cover is connected to the base to form a cavity for accommodating the circuit breaker, and the first crank arm mechanism, the insulating pull rod, the guide mechanism and the second crank arm mechanism are all disposed in the cavity.

3. The circuit breaker drive device according to claim 1, characterized in that, The guide rod assembly includes a guide joint and an inner transmission connecting plate; the second crank arm mechanism includes an inner transmission crank arm. One end of the guide joint is connected to the insulating pull rod, and the other end of the guide joint is connected to one end of the inner transmission connecting plate. The other end of the inner transmission connecting plate is rotatably connected to the inner transmission crank arm.

4. The circuit breaker drive device according to claim 1, characterized in that, The first crank arm mechanism includes an outer crank arm for external transmission, a transmission shaft, and an inner crank arm for external transmission; One end of the outer crank arm is rotatably connected to the operating mechanism, and the other end of the outer crank arm is connected to one end of the inner crank arm via the transmission shaft. The other end of the inner crank arm is rotatably connected to the insulating pull rod.

5. The circuit breaker drive device according to claim 4, characterized in that, The operating mechanism includes an operating mechanism connector and an operating mechanism connecting plate; One end of the operating mechanism connecting plate is connected to the operating mechanism connector, and the other end is rotatably connected to the external transmission crank arm.

6. The circuit breaker drive device according to claim 4, characterized in that, The rotation direction of the inner crank arm of the outer drive is the first direction, and the rotation direction of the inner crank arm is the second direction, with the first direction being perpendicular to the second direction.

7. The circuit breaker drive device according to claim 6, characterized in that, The direction of movement of the inner transmission connecting plate is perpendicular to the direction of rotation of the inner crank arm of the outer transmission.

8. The circuit breaker drive device according to claim 1, characterized in that, The circuit breaker drive device also includes a supporting insulating component and a moving-side housing; The supporting insulating member is connected to the moving side housing; The air chamber connecting plate is located inside the moving side housing. The air chamber connecting plate is movable and engaged with the air chamber, and is connected to the internal transmission crank arm.

9. The circuit breaker drive device according to claim 8, characterized in that, The operating mechanism further includes an operating mechanism chamber, which is connected to the supporting insulating member, and the first crank arm mechanism is disposed in the operating mechanism chamber.

10. A circuit breaker system, characterized in that, Includes the circuit breaker drive as described in any one of claims 1-9.

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