A drive device for a circuit breaker

Abstract

The utility model relates to the field of fabricated building, concretely provides a drive arrangement of circuit breaker. The utility model discloses a circuit breaker main part and bottom disc car, be provided with panel on the circuit breaker main part, install the worm wheel on the panel, the worm wheel is engaged with worm, constitutes mechanical transmission part, install handle on the worm, rotate through manual drive worm wheel, further control circuit breaker main part's switching operation, the spiral angle design of worm is less than friction angle, ensure reverse self -locking function, realize high -efficient energy conversion through adopting the combination design of worm wheel worm drive and spring energy storage, make the operating personnel be able to easily complete energy storage process, the synergic work of vacuum bubble and plum blossom contact finger forms double guarantee mechanism, and the vacuum arc-extinguishing chamber can extinguish instantaneously when opening, and the elastic contact structure of plum blossom contact finger guarantees that contact resistance is certain under the on state, effectively avoids the overheat risk.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to a circuit breaker drive device. Background Technology

[0002] Circuit breakers are key protective devices in power systems, primarily used to safely connect, carry, and disconnect current under normal circuit conditions, and to automatically disconnect fault current within a specified time. Their core function is to protect electrical equipment and lines from damage by quickly disconnecting fault circuits. Typical structures include contact systems, arc-extinguishing devices, operating mechanisms, and tripping mechanisms. Based on the arc-extinguishing medium, they can be classified into air, vacuum, SF6, and other types. Modern circuit breakers integrate mechanical protection and intelligent monitoring functions, serving as both circuit control and system protection devices, and are fundamental equipment for ensuring the safe and stable operation of the power grid.

[0003] The inventors of this application have discovered the following problems during practical use:

[0004] Currently, when a circuit breaker stores energy, a radial load is applied to the energy storage spring by pressing or rotating the handle to store elastic potential energy. When the spring is compressed to the preset end point of the stroke, the ratchet mechanism achieves mechanical self-locking at the over-dead point position. At this time, a clear ratchet engagement sound can be heard. Pressing the closing button releases the spring energy and drives the contacts to close. However, in actual use, the operator needs to apply a certain load to the handle, which does not have the characteristics of saving effort and results in poor performance.

[0005] Therefore, it is necessary to provide a circuit breaker drive device to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a circuit breaker drive device in view of the above-mentioned defects of the prior art.

[0007] To achieve the above objectives, the technical solution of this utility model is: a circuit breaker drive device, comprising a circuit breaker body and a chassis, a panel being provided on the circuit breaker body, a worm gear being installed on the panel, and a worm being connected to the worm gear, the two meshing to form a mechanical transmission component, a handle being installed on the worm, and the opening and closing operation of the circuit breaker body being controlled by manually driving the worm gear to rotate, thereby controlling the opening and closing operation of the circuit breaker body, the helix angle of the worm being designed to be less than the friction angle to ensure reverse self-locking function and prevent malfunction after opening.

[0008] By adopting the above technical solution, the design of the worm gear helix angle being smaller than the friction angle forms a reliable self-locking mechanism. In the open state, it can effectively prevent erroneous operation caused by vibration or external force, greatly improving the safety performance of the equipment. This structure is particularly suitable for power distribution sites that require frequent operation and have high safety requirements. Its mechanical self-locking characteristics can maintain a stable state without additional energy consumption.

[0009] Furthermore, the worm gear is connected to a foldable handle at its end. The handle is made of insulating material and has anti-slip texture on its surface. When not in use, the handle can be folded and stored on the panel surface to avoid accidental contact. When in operation, it can be unfolded to 90 to 180 degrees to provide a lever-based effort-saving effect.

[0010] By adopting the above technical solution, the anti-slip texture design on the handle surface significantly improves the grip stability during operation. The lever structure formed after unfolding can reduce the operating torque, greatly reducing the labor intensity of the operator. This design not only ensures compactness when stored, but also achieves labor-saving effect during operation, making it particularly suitable for use in space-constrained power distribution cabinet environments.

[0011] Furthermore, the panel integrates a trip button, a closing button, trip / closing indicator lights, and an energy storage indicator light. The closing and trip buttons are mechanically interlocked to prevent simultaneous accidental triggering. The trip / closing indicator lights are dual-color LEDs, with green indicating the closed state and red indicating the open state. The energy storage indicator light is yellow, and when lit, it indicates the energy storage state. The brightness can be adjusted to adapt to different lighting environments.

[0012] By adopting the above technical solution, using dual-color LED indicator lights with automatic brightness adjustment function, not only can the equipment status be clearly distinguished, but it can also adapt to various ambient lighting conditions from strong light to dim light. The addition of energy storage indicator lights allows operators to intuitively understand the energy storage status of the equipment. This integrated human-machine interface greatly improves the convenience and safety of operation.

[0013] Furthermore, the circuit breaker body is equipped with a vacuum bulb, which generates an electric arc and quickly extinguishes the arc during opening and closing, thereby achieving reliable circuit switching.

[0014] By adopting the above technical solution, the completely sealed structure of the vacuum interrupter avoids the influence of the external environment and ensures that it can reliably interrupt the circuit under the rated short-circuit current. This design is particularly suitable for power distribution systems that require frequent operation or have large short-circuit current, and significantly extends the service life of electrical appliances.

[0015] Furthermore, the vacuum bulb is provided with a plum blossom-shaped contact finger, which is connected to an external circuit. The plum blossom-shaped contact finger has multiple radially distributed contact pieces to ensure reliable contact with a large area of ​​external conductors.

[0016] By adopting the above technical solution, the elastic contact structure can automatically compensate for contact wear and ensure stable contact pressure throughout the entire service life. This design is particularly suitable for high current applications, ensuring both good conductivity and resistance to mechanical shocks from frequent operation.

[0017] In a further configuration, the chassis is located below the circuit breaker body, and a push-pull handle is installed on the chassis. The push-pull handle is connected to the protrusion, and the protrusion is moved by the horizontal movement of the push-pull handle, thereby realizing the retraction of the protrusion.

[0018] By adopting the above technical solution, the retraction mechanism of the tab adopts the mechanical self-locking principle, which can automatically maintain a fixed state after the equipment is in place without additional operation. This design greatly simplifies the operation process of moving and fixing the equipment and improves maintenance efficiency.

[0019] Furthermore, the chassis has several rollers on the left and right sides of its bottom, and corresponding guide rails. The rollers are fixed to the guide rails by the extension and retraction of the convex tabs. The rollers are equipped with baffles to ensure precise engagement between the rollers and the guide rails.

[0020] By adopting the above technical solution, the baffle's precise guiding function ensures a perfect fit between the roller and the guide rail. This design not only facilitates the movement and positioning of the equipment but also effectively prevents displacement of the equipment during operation, ensuring the reliability of the electrical connection.

[0021] Compared with related technologies, the circuit breaker driving device provided by this utility model has the following beneficial effects:

[0022] This utility model provides a circuit breaker drive device that achieves efficient energy conversion through a combination of worm gear transmission and spring energy storage, allowing operators to easily complete the energy storage process. The instantaneous locking function of the pawl mechanism ensures accurate and reliable energy storage position. Combined with the multi-state display of dual-color LED indicator lights, it constructs an intuitive human-machine interaction system, significantly improving operational safety and convenience. At the same time, the coordinated work of the vacuum interrupter and the plum blossom contact fingers forms a dual protection mechanism. The vacuum interrupter can be extinguished instantly when the circuit is opened, while the elastic contact structure of the plum blossom contact fingers ensures a constant contact resistance when the circuit is closed, effectively avoiding the risk of overheating. The coordinated design of the mechanical holding mechanism and the electromagnetic tripping mechanism ensures that the opening and closing actions have a definite motion trajectory. Combined with the self-locking characteristics of the worm gear, it ensures that the device can maintain a stable state even under harsh environments such as vibration and impact, extending the service life of the equipment. This device highly integrates functions such as operating force transmission, arc extinguishing, and status indication through modular design, significantly reducing the installation space requirement while ensuring performance. It is particularly suitable for intelligent power distribution sites with limited space, solving the technical problems of large operating torque and low positioning accuracy of traditional circuit breakers. Attached Figure Description

[0023] Figure 1 A schematic diagram of a preferred embodiment of a circuit breaker drive device provided by this utility model;

[0024] Figure 2 This is a front view structural diagram of the present utility model;

[0025] Figure 3 This is a side view of the structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of this utility model from a bottom view.

[0027] The following are labeled in the diagram: 1. Worm gear; 2. Handle; 3. Worm wheel; 4. Baffle; 5. Push-pull handle; 6. Lug; 7. Closing button; 8. Opening button; 9. Closing / opening indicator light; 10. Energy storage indicator light; 12. Circuit breaker body; 13. Panel; 14. Chassis; 15. Vacuum bulb; 16. Plexicon contact finger. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings show typical embodiments of this utility model.

[0029] In this embodiment:

[0030] like Figure 1 As shown, this utility model discloses a circuit breaker drive device, including a circuit breaker body 12 and a chassis 14. A panel 13 is provided on the circuit breaker body 12, and a worm gear 3 is mounted on the panel 13. A worm 1 is connected to the worm gear 3, and the two mesh to form a mechanical transmission component. A handle 2 is mounted on the worm 1. By manually driving the worm gear 3 to rotate, the opening and closing operation of the circuit breaker body 12 is controlled. The helix angle of the worm 1 is designed to be less than the friction angle to ensure reverse self-locking function and prevent malfunction after opening. The design of the worm helix angle being less than the friction angle forms a reliable self-locking mechanism, which can effectively prevent malfunctions caused by vibration or external force in the open state, improving the safety performance of the equipment. This structure is particularly suitable for power distribution locations that require frequent operation and have high safety requirements. Its mechanical self-locking characteristic can maintain a stable state without additional energy consumption. The design of the worm gear transmission mechanism achieves a precise mechanical transmission ratio. By manually driving the worm gear to rotate, the opening and closing operation of the circuit breaker body can be accurately controlled, ensuring the reliability and repeatability of the operation.

[0031] like Figure 2As shown, the worm gear 1 is connected to a foldable handle 2 at its end. The handle 2 is made of insulating material and has anti-slip texture on its surface. When not in use, the handle 2 can be folded and stored on the surface of the panel 13 to avoid accidental contact. When in operation, it can be unfolded to 90 to 180 degrees to provide a lever effect that saves effort. The anti-slip texture on the surface of the handle significantly improves the grip stability during operation. The lever structure formed after unfolding can reduce the operating torque and reduce the labor intensity of the operator. This design ensures both compactness when stored and effort-saving effect during operation, making it particularly suitable for use in space-constrained electrical cabinet environments. The foldable handle is made of insulating material, which not only ensures electrical safety during operation but also effectively avoids the risk of accidental electric shock.

[0032] like Figure 3 As shown, panel 13 integrates a trip button 8, a closing button 7, a trip / closing indicator light 9, and an energy storage indicator light 10. The closing button 7 and the trip button 8 adopt a mechanical interlock design to prevent simultaneous accidental triggering. The trip / closing indicator light 9 is a dual-color LED, with green indicating the closed state and red indicating the open state. The energy storage indicator light 10 is yellow, indicating the energy storage state when lit, and its brightness can be adjusted to adapt to different lighting environments. The use of dual-color LED indicators combined with the automatic brightness adjustment function not only clearly distinguishes the equipment status but also adapts to various ambient lighting conditions from strong light to dim light. The addition of the energy storage indicator light allows operators to intuitively understand the energy storage status of the equipment. This integrated human-machine interface improves the convenience and safety of operation. The mechanically interlocked trip / closing button design fundamentally eliminates the possibility of simultaneous accidental triggering, ensuring the correctness of the operating logic.

[0033] like Figure 3 As shown, a vacuum interrupter 15 is provided inside the circuit breaker body 12. The vacuum interrupter 15 generates an electric arc and quickly extinguishes the arc during opening and closing, realizing reliable circuit switching. The completely sealed structure of the vacuum interrupter chamber avoids the influence of the external environment and ensures that the circuit can still be reliably interrupted under the rated short-circuit current. This design is particularly suitable for power distribution systems that require frequent operation or have large short-circuit currents, significantly extending the service life of electrical appliances. The design of the vacuum interrupter utilizes the excellent insulation and arc-extinguishing properties of the vacuum medium, which can quickly extinguish the arc at the moment of opening and closing, improving practicality.

[0034] like Figure 3As shown, the vacuum bulb 15 is provided with a plum blossom contact 16, which is connected to the external circuit through the plum blossom contact 16. The plum blossom contact 16 has multiple radially distributed contact pieces to ensure reliable contact with the external conductor over a large area. The elastic contact structure can automatically compensate for contact wear and ensure stable contact pressure throughout the entire service life. This design is particularly suitable for high current applications, which can ensure good conductivity and withstand the mechanical shock caused by frequent operation. The radially distributed design of the multiple contact pieces of the plum blossom contact forms multi-point parallel contact, which effectively increases the conductive area.

[0035] like Figure 3 As shown, the chassis 14 is located below the circuit breaker body 12. A push-pull handle 5 is installed on the chassis 14. The push-pull handle 5 is connected to the cam 6. The cam 6 is moved horizontally by the push-pull handle 5, which in turn moves the cam 6 and retracts it. The cam retraction mechanism adopts the mechanical self-locking principle, which can automatically maintain a fixed state after the equipment is in place without additional operation. This design simplifies the operation process of moving and fixing the equipment and improves maintenance efficiency. The linkage design between the push-pull handle and the cam enables convenient movement and precise positioning of the chassis, allowing operators to easily complete the relocation operation of the equipment.

[0036] like Figure 3 As shown, the chassis 14 has several rollers on the left and right sides at the bottom, and is equipped with corresponding guide rails. The rollers are fixed to the guide rails by the extension and retraction of the convex tabs 6. The rollers are equipped with baffles 4, which make the rollers and guide rails fit precisely. The precise guiding function of the baffles ensures that the rollers and guide rails fit perfectly. This design not only facilitates the movement and positioning of the equipment, but also effectively prevents the equipment from shifting during operation, ensuring the reliability of electrical connections. The cooperative design of the rollers and guide rails makes the chassis move more smoothly and steadily, reducing vibration and impact when the equipment is moved.

[0037] In practice, the operator first unfolds the folding handle 2 to the working position and rotates the handle to drive the worm gear 1 to rotate. The meshing transmission between the worm gear and the worm wheel 3 converts the rotational motion into the compression of the energy storage spring. At this time, the energy storage indicator light 10 flashes yellow. When the spring is compressed to the set position, the pawl mechanism makes a "click" sound to lock the spring, and the energy storage indicator light turns on, completing the energy storage preparation. Pressing the closing button 7 releases the energy storage spring, which drives the moving contact of the vacuum bulb 15 to accelerate through the linkage mechanism, so that the elastic contact of the plum blossom contact finger 16 gradually contacts the stationary contact, achieving complete engagement. The opening and closing indicator light 9 changes from red to green, and the mechanical holding mechanism immediately locks the closing position to prevent vibration-induced tripping. Pressing the opening button 8 causes the tripping electromagnet to contact the mechanical holding, and the opening spring quickly pulls the moving contact of the vacuum bulb 15 to separate, generating an electric arc which then extinguishes. The opening and closing indicator light turns red, and the worm gear self-locking mechanism immediately takes effect to prevent accidental closing.

[0038] The advantages of this technical solution in practical applications include, but are not limited to, the following:

[0039] 1. Through the meshing of the worm gear 3 and the worm, its mechanical self-locking characteristic can maintain a stable state without additional energy consumption. The design of the worm gear transmission mechanism realizes a precise mechanical transmission ratio.

[0040] 2. The vacuum interrupter 15 generates an electric arc during opening and closing and quickly extinguishes the arc, thus achieving reliable circuit switching. The completely sealed structure of the vacuum interrupter chamber avoids the influence of the external environment and ensures that the circuit can still be reliably interrupted under the rated short-circuit current.

Claims

1. A drive device for a circuit breaker, characterized in that: The circuit breaker includes a circuit breaker body (12) and a chassis (14). The circuit breaker body (12) is provided with a panel (13), and a worm gear (3) is installed on the panel (13). A worm (1) is connected to the worm gear (3). The two mesh with each other to form a mechanical transmission component. A handle (2) is installed on the worm (1). By manually driving the worm gear (3) to rotate, the circuit breaker body (12) can be controlled to open and close. The helix angle of the worm (1) is designed to be less than the friction angle to ensure the reverse self-locking function and prevent false operation after opening.

2. The driving device for a circuit breaker according to claim 1, characterized in that, The worm gear (1) is connected to a foldable handle (2) at the end. The handle (2) is made of insulating material and has anti-slip texture on the surface. When not in use, the handle (2) can be folded and stored on the surface of the panel (13) to avoid accidental contact. When in operation, it can be unfolded to 90 to 180 degrees to provide a lever-saving effect.

3. The circuit breaker drive device according to claim 1, characterized in that, The panel (13) integrates a trip button (8), a closing button (7), a trip / closing indicator light (9), and an energy storage indicator light (10). The closing button (7) and the trip button (8) are mechanically interlocked to prevent simultaneous accidental triggering. The trip / closing indicator light (9) is a dual-color LED, with green indicating the closing state and red indicating the opening state. The energy storage indicator light (10) is yellow, and when lit, it indicates the energy storage state. The brightness can be adjusted to adapt to different lighting environments.

4. The driving device for a circuit breaker according to claim 1, characterized in that, The circuit breaker body (12) is equipped with a vacuum bulb (15). The vacuum bulb (15) generates an electric arc and quickly extinguishes the arc when the circuit is opened or closed, so as to realize reliable circuit switching.

5. The driving device for a circuit breaker according to claim 4, characterized in that, The vacuum bulb (15) is provided with a plum blossom contact finger (16), which is connected to an external circuit through the plum blossom contact finger (16). The plum blossom contact finger (16) has multiple radially distributed contact pieces to ensure reliable contact with a large area of ​​external conductors.

6. The driving device for a circuit breaker according to claim 1, characterized in that, The chassis (14) is located below the circuit breaker body (12). A push-pull handle (5) is installed on the chassis (14). The push-pull handle (5) is connected to the protrusion (6). The protrusion (6) is moved by the horizontal movement of the push-pull handle (5), thereby realizing the retraction of the protrusion (6).

7. The driving device for a circuit breaker according to claim 1, characterized in that, The chassis (14) has several rollers on the left and right sides of its bottom and is equipped with corresponding guide rails. The rollers are fixed to the guide rails by the extension and retraction of the convex piece (6). The rollers are equipped with baffles (4) so ​​that the rollers and guide rails can be precisely matched by the baffles (4).

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