A trip unit for a circuit breaker and a circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a tripping mechanism of a circuit breaker and the circuit breaker. The circuit breaker comprises a strip-shaped shell, and the tripping mechanism of the circuit breaker is arranged in a handle operating assembly, an electric drive structure, a first transmission assembly, a lever, a transient protection assembly and a switching assembly in the strip-shaped shell. The switching assembly has a closed state and an open state. In the closed state, a lock catch is in a locked state, and in the open state, the lock catch is in an unlocked state. The handle operating assembly is connected with the switching assembly through a second transmission assembly. The electric drive structure is connected with the switching assembly through the first transmission assembly. The lever is rotatably connected with the strip-shaped shell, and the lever is located in a transmission track of the first transmission assembly. When the first transmission assembly is driven, the lever is triggered to rotate. The transient protection assembly has a driving rod located between the lever and the lock catch. The technical problem that it is difficult to control the lock catch for a long distance or the control precision is low in the long strip-shaped circuit breaker is solved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a circuit breaker tripping mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. A circuit breaker generally consists of a contact system, an arc-extinguishing system, an operating mechanism, protective devices, and a housing. The protective devices mainly include a tripping mechanism, which controls the opening or closing of the circuit breaker. In the event of a short circuit or severe overload, the circuit breaker can be opened via the tripping mechanism.

[0003] Existing tripping mechanisms typically use a reduction gear mechanism to drive a lever to drive the latch to achieve tripping, or use a switch handle for tripping. To save manpower, they often use an electric drive structure to actively drive the latch to close. However, in long strip circuit breakers, due to the narrow internal space of the circuit breaker and the distribution of various structural components along the length of the circuit breaker, the distance between them is relatively far, making it difficult to control the latch over long distances or resulting in low control accuracy. Summary of the Invention

[0004] This invention provides a tripping mechanism and a circuit breaker, which solves the technical problem that in long strip circuit breakers, due to the narrow internal space of the circuit breaker and the distribution of various structural components along the length of the circuit breaker, the arrangement distance is far, making it difficult to control the latch over a long distance or resulting in low control accuracy.

[0005] In view of this, the first aspect of the present invention provides a tripping mechanism for a circuit breaker, the circuit breaker including a strip-shaped housing, the tripping mechanism of the circuit breaker including a handle operating assembly, an electric drive structure, a first transmission assembly, a lever, an instantaneous protection assembly and a tripping assembly disposed within the strip-shaped housing;

[0006] The circuit breaker assembly has a closed state and a closed state. In the closed state, its latch is locked, and in the closed state, its latch is unlocked.

[0007] The handle operation component is connected to the opening and closing component through the second transmission component, and is used to realize manual opening or closing operation;

[0008] The electric drive structure is connected to the opening and closing assembly through the first transmission component. Under the action of the electric drive structure, the first transmission component drives the opening and closing assembly to close the circuit to realize the electric closing operation.

[0009] The lever is rotatably connected to the strip-shaped housing, and the lever is located within the transmission trajectory of the first transmission assembly. When the first transmission assembly transmits power in the second direction, it triggers the lever to rotate.

[0010] The instantaneous protection component has a drive rod located between the lever and the latch, which pushes the latch to unlock under the rotation of the lever, so as to realize the electric tripping operation.

[0011] Optionally, the instantaneous protection component includes a moving iron core, a return spring, and a mounting base; the mounting base is fixedly connected to the strip-shaped housing; the moving iron core is slidably disposed within the mounting base, one end of the moving iron core extends out of one end of the mounting base and abuts against the end of the lever away from the first transmission component, and the other end is integrally connected to the drive rod, which extends out of the other end of the mounting base to push the latch to unlock; a limiting flange is provided on the outer periphery of the moving iron core, the return spring is sleeved on the moving iron core, one end of the return spring abuts against the end of the mounting base near the latch, and the other end abuts against the limiting flange; a coil assembly is sleeved on the outer side of the mounting base corresponding to the moving iron core.

[0012] Optionally, the instantaneous protection component includes a moving iron core, a return spring, and a mounting base; the mounting base is fixedly connected to the strip-shaped housing; the moving iron core is slidably disposed within the mounting base, with one end of the moving iron core near the latch extending out of the mounting base to push the latch to unlock; a limiting flange is provided on the outer periphery of the moving iron core; the return spring is sleeved on the moving iron core, with one end of the return spring abutting against the end of the mounting base near the latch and the other end abutting against the limiting flange; a coil assembly is sleeved on the outer side of the mounting base corresponding to the moving iron core;

[0013] The drive rod passes through the interior of the moving iron core and is slidably connected to the moving iron core; wherein, one end of the drive rod extends out of one end of the mounting base and abuts against the end of the lever away from the first transmission component, and the other end extends out of the other end of the mounting base to push the latch to unlock.

[0014] Optionally, the first transmission assembly includes a reduction gear assembly and a first sector gear distributed along the length of the strip-shaped housing; the electric drive structure is drivenly connected to the reduction gear assembly, the reduction gear assembly is meshed with the first sector gear, the lever is located within the transmission trajectory of the reduction gear assembly, and the lever is triggered to rotate when the reduction gear assembly is driven in the second direction; the first sector gear is connected to the latch, and the first sector gear drives the latch to lock when driven in the first direction, thereby realizing the electric closing operation.

[0015] Optionally, the electric drive structure includes a drive motor;

[0016] The reduction gear assembly includes a gear set and a drive gear distributed along the length of the strip-shaped housing;

[0017] The drive motor meshes with the gear set via a worm gear, and the gear set meshes with the actuating gear;

[0018] One end of the actuating gear protrudes outward and is provided with an actuating block, which rotates with the actuating gear and can abut against one end of the lever to drive the lever to rotate.

[0019] A second sector gear is coaxially arranged at the end of the actuating gear away from the actuating block, and the first sector gear meshes with the second sector gear.

[0020] Optionally, the handle operation assembly includes a handle and a first connector;

[0021] The second transmission assembly includes a rotating component, which is rotatably connected to the strip-shaped housing and connected to the latch.

[0022] One end of the first connector is connected to the handle, and the other end is rotatably connected to the rotating member away from the axis. The handle can drive the rotating member to rotate, thereby locking or unlocking the lock.

[0023] Optionally, the rotating component is coaxially connected to the first sector gear, and the rotating component is connected to the latch via a second connecting component;

[0024] One end of the second connector is rotatably connected to the rotating member away from the axis, and the other end is rotatably connected to the end of the latch away from the drive rod, so as to drive the latch to lock or unlock.

[0025] Optionally, the actuating block and the center line of the second sector gear are spaced at a predetermined angle in the circumferential direction.

[0026] Optionally, the strip-shaped housing has a limiting member inside on the side of the lever away from the latch for limiting the lever's position.

[0027] A second aspect of the present invention provides a circuit breaker including a tripping mechanism of the circuit breaker as described in any of the first aspects.

[0028] The technical solution of this invention has the following advantages:

[0029] In this invention, when the circuit breaker is closed, i.e., the latch is in the locked state, the electric drive structure drives the first transmission component to rotate along the second direction. During the transmission process, it triggers and drives one end of the lever to rotate along the first direction, while the other end of the lever also rotates along the first direction. Thus, under the rotation of the lever, the drive rod pushes the end of the latch near the lever to rotate along the first direction, causing the latch to rotate and thus change from the locked state to the unlocked state, thereby achieving the purpose of electric tripping. By using the lever and the drive rod of the instantaneous protection component as the transmission for the intermediate process of controlling the latch unlocking, the control distance of the latch release and unlocking controlled by the electric drive structure is improved. This enables long-distance control of the latch release within the narrow space of the strip-shaped housing, improving space utilization and control accuracy of the latch. In addition, the electric drive structure can drive the first transmission component to rotate along the first direction to drive the circuit breaker closing component to achieve electric closing operation, saving manpower and improving the level of intelligence. Furthermore, the circuit breaker closing component can be controlled by the handle operation component to achieve manual opening or closing operation, increasing the diversity of control over the circuit breaker closing component. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 A front view of a circuit breaker tripping mechanism provided in an embodiment of the present invention;

[0032] Figure 2 A partial cross-sectional view of a circuit breaker tripping mechanism provided in an embodiment of the present invention;

[0033] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 4 This is a rear view of a circuit breaker tripping mechanism provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Strip-shaped housing; 2. Instantaneous protection component; 201. Moving iron core; 202. Return spring; 203. Mounting base; 204. Limiting block; 205. Limiting flange; 206. Coil assembly; 3. Lock; 4. Lever; 5. Drive motor; 6. Worm gear; 7. Reduction gear assembly; 701. Gear set; 702. Actuating gear; 703. Actuating block; 704. Second sector gear; 8. First sector gear; 9. Limiting component; 10. First micro switch; 11. Second micro switch; 12. Third micro switch; 13. Fourth micro switch; 14. First connecting component; 15. Second connecting component; 16. Handle; 17. First protrusion; 18. Second protrusion; 19. Rotating component; 20. Overload protection component; 21. Arc extinguishing chamber. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] Please see Figures 1 to 4A tripping mechanism for a circuit breaker is disclosed. The circuit breaker includes a strip-shaped housing 1, a handle operating assembly, an electric drive structure, a first transmission assembly, an instantaneous protection assembly 2, a lever 4, and a closing / opening assembly disposed within the strip-shaped housing 1. The closing / opening assembly has a closed state and an open state. In the closed state, its latch 3 is locked, and in the open state, its latch 3 is unlocked. The handle operating assembly is connected to the closing / opening assembly via the second transmission assembly to realize manual closing or opening operations. The electric drive structure is connected to the closing / opening assembly via the first transmission assembly. Under the action of the electric drive structure, the first transmission assembly drives the closing / opening assembly to close in a first direction to realize electric closing operations. The lever 4 is rotatably connected to the strip-shaped housing 1, and the lever 4 is located within the transmission trajectory of the first transmission assembly. When the first transmission assembly drives in a second direction, it triggers the lever 4 to rotate. The instantaneous protection assembly 2 has a drive rod located between the lever 4 and the latch 3. Under the rotation of the lever 4, the latch 3 is pushed to unlock to realize electric opening operations.

[0043] It should be noted that the latch 3 is rotatably connected to the strip-shaped housing 1, and the unlocking or locking state is achieved by rotation. The first direction refers to the direction in which the end of the latch 3 near the lever 4 rotates away from the lever 4, and the second direction refers to the direction in which the end of the latch 3 near the lever 4 rotates towards the lever 4. Figure 1 As shown, the first direction is the clockwise direction in the figure. When the latch 3 is in the locked state, one end of the latch 3 is close to the lever 4. The second direction is the counterclockwise direction in the figure. When the latch 3 is in the unlocked state, one end of the latch 3 is away from the lever 4.

[0044] In this embodiment, when the circuit breaker is closed, i.e., the latch 3 is in the locked state, the electric drive structure drives the first transmission component to rotate in the second direction. During the transmission process, it triggers and drives one end of the lever 4 to rotate in the first direction, while the other end of the lever 4 also rotates in the first direction. Thus, under the rotation of the lever 4, the drive rod pushes the end of the latch 3 near the lever 4 to rotate in the first direction, causing the latch 3 to rotate and thus change from the locked state to the unlocked state, thereby achieving the purpose of electric tripping. The lever 4 and the drive rod of the instantaneous protection component 2 are used to control the unlocking of the latch 3. The transmission in the intermediate process increases the control distance of the latch 3 to be released and unlocked by the electric drive structure, enabling long-distance control of the latch 3 to be released in the narrow space of the strip-shaped housing 1, improving space utilization and control accuracy of the latch 3. In addition, the electric drive structure can drive the first transmission component to drive the opening and closing component to close the circuit breaker to achieve electric closing operation, saving manpower and improving the level of intelligence. Furthermore, the opening and closing component can be controlled by the handle operation component to achieve manual opening or closing operation, improving the diversity of control of the circuit breaker opening and closing component.

[0045] Example 2

[0046] As a further improvement to Example 1, such as Figures 1 to 4 As shown, the instantaneous protection component 2 includes a moving iron core 201, a return spring 202, and a mounting base 203. The mounting base 203 is fixedly connected to the strip-shaped housing 1. The moving iron core 201 is slidably disposed within the mounting base 203. One end of the moving iron core 201 extends out of one end of the mounting base 203 and abuts against the end of the lever 4 away from the first transmission component. The other end is integrally connected to a drive rod, which extends out of the other end of the mounting base 203 to push the latch 3 to unlock. A limiting flange 205 is provided on the outer periphery of the moving iron core 201. The return spring 202 is sleeved on the moving iron core 201. One end of the return spring 202 abuts against the end of the mounting base 203 near the latch 3, and the other end abuts against the limiting flange 205. A coil assembly 206 is sleeved on the outer side of the mounting base 203 corresponding to the moving iron core 201.

[0047] It should be noted that the strip-shaped housing 1 is equipped with a control circuit suitable for connection with the instantaneous protection component 2; when the latch 3 is in the locked state, the end of the latch 3 near the drive rod abuts against the drive rod; wherein, the coil group 206 is connected to the control circuit.

[0048] In this embodiment, during tripping, the electric drive structure drives the first transmission assembly to rotate the lever 4 in the first direction. Then, the lever 4 pushes the moving iron core 201 within the mounting base 203, compressing the reset spring 202 and causing the drive rod to slide towards the latch 3. Since the latch 3 is in contact with the drive rod at this time, the drive rod pushes the latch 3 to rotate in the first direction from the locked state to the unlocked state, thus opening the circuit breaker assembly. After opening, when the end of the lever 4 near the first transmission assembly is not in contact with the first transmission assembly and is not under force, the end of the moving iron core 201 that engages with the lever 4 has no force. The moving iron core 201 then slides towards one side of the lever 4 under the action of the reset spring 202 pushing the limiting flange 205, simultaneously pushing the lever 4 to rotate and reset in the second direction. At this time, since the drive rod follows the moving iron core 201 to slide towards the lever 4, the drive rod is no longer in the latch. 3. If the circuit breaker rotates along the second direction, the latch 3 can rotate along the second direction to achieve a locked state, thus closing the circuit breaker. In addition, when a short circuit fault occurs in the circuit breaker, the control circuit can control the coil group 206 to be energized, which can drive the moving iron core 201 in the mounting base 203 to slide towards the latch 3, thereby driving the drive rod to push the latch 3 to rotate along the first direction to release and unlock, so that the circuit breaker can be opened. The reaction speed is fast, which plays a protective role. When it is necessary to actively control the tripping, it can be done through the electric drive structure. At this time, the moving iron core 201 plays an indirect mechanical transmission role, which will not affect the short circuit protection of the instantaneous protection component 2. It has multiple functions. Through the arrangement of the instantaneous protection component 2, it can play a role in transmission to improve the control distance and accuracy, and at the same time play a role in short circuit protection when a fault occurs, and they do not affect each other.

[0049] As an alternative implementation, the instantaneous protection component 2 may include a moving iron core 201, a return spring 202, and a mounting base 203. The mounting base 203 is fixedly connected to the strip-shaped housing 1. The moving iron core 201 is slidably disposed within the mounting base 203, with one end of the moving iron core 201 extending out of the mounting base 203 near the latch to push the latch 3 to unlock. A limiting flange 205 is provided on the outer periphery of the moving iron core 201. The return spring 202 is sleeved on the moving iron core 201, with one end of the return spring 202 abutting against the end of the mounting base 203 near the latch 3 and the other end abutting against the limiting flange 205. A coil assembly 206 is sleeved on the outer side of the mounting base 203 corresponding to the moving iron core 201. A drive rod passes through the interior of the moving iron core 201 and is slidably connected to the moving iron core (not shown in the figure). One end of the drive rod extends out of one end of the mounting base 203 and abuts against the end of the lever 4 away from the first transmission component, while the other end extends out of the other end of the mounting base 203 to push the latch 3 to unlock.

[0050] It should be noted that the strip-shaped housing 1 is equipped with a control circuit suitable for connection with the instantaneous protection component 2; when the latch 3 is in the locked state, the end of the latch 3 near the drive rod abuts against the drive rod; wherein, the coil group 206 is connected to the control circuit.

[0051] In this embodiment, during tripping, the electric drive structure drives the first transmission assembly to rotate the lever 4 in the first direction. The end of the lever 4 that abuts against the drive rod pushes the drive rod to slide inside the moving iron core 201. Since the latch 3 abuts against the drive rod at this time, the drive rod pushes the latch 3 to rotate in the first direction from the locked state to the unlocked state, thereby realizing the tripping of the opening and closing assembly. After tripping, the end of the drive rod that cooperates with the lever 4 has no force. At this time, the latch 3 can be manually closed under the action of the handle operation assembly or electrically closed under the action of the first transmission assembly. During the process of entering the locked state, the latch 3 rotates towards the drive rod and then... The first contact pushes the drive rod to slide towards the lever side and pushes the lever 4 to reset until the latch 3 is locked. When a short circuit fault occurs in the circuit breaker, the control circuit can control the coil group 206 to be energized, thereby driving the moving iron core 201 in the mounting base 203 to compress the reset spring 202 and slide towards the latch 3 to push the latch 3 to rotate in the first direction to release and unlock, so that the opening and closing assembly can open. The reaction speed is fast and plays a protective role. After the coil group 206 is de-energized, the moving iron core 201, under the action of the reset spring 202, pushes the limiting flange 205 to slide towards the lever 4 side to reset. The driving rod and the moving iron core 201 operate independently. During active control tripping, the lever 4 and the driving rod work together to drive the latch 3 to release and unlock. The mechanical transmission improves the long-distance control capability and control accuracy. In the event of a fault or short circuit, the moving iron core 201 pushes the latch 3 to release and unlock. The driving rod and the moving iron core 201 work independently, which can improve the service life of the instantaneous protection component 2 and ensure that it can play a normal protective role in the event of a fault.

[0052] Preferably, the mounting base 203 has a movable cavity, and the moving iron core 201 is slidably connected to the movable cavity; a limiting block 204 is provided at one end of the movable cavity near the latch 3, and a through hole is provided in the limiting block 204 along the moving direction of the moving iron core 201. A limiting protrusion is provided in the through hole, and one end of the moving iron core 201 extends out of the mounting base 203 along the through hole; one end of the return spring 202 extends into the through hole and abuts against the side wall of the through hole through the limiting protrusion. By providing the limiting block 204 inside the movable cavity, the movement distance of the moving iron core 201 is limited.

[0053] Based on the above implementation method, in a specific implementation method, an overload protection component 20 is also included. The overload protection component 20 is connected to the circuit breaker opening and closing component and is used to drive the circuit breaker opening and closing component to open when the circuit breaker is overloaded, so as to play the role of overload protection.

[0054] Specifically, the overload protection component 20 includes a bimetallic strip. One end of the bimetallic strip is connected to the circuit breaker opening and closing assembly, and the other end is fixedly connected to the strip-shaped housing and electrically connected to a control circuit. In the event of a circuit breaker overload, the latch 3 in the circuit breaker opening and closing assembly can be released and unlocked so that the circuit breaker opening and closing assembly can open.

[0055] Bimetallic sheets, also known as thermal bimetallic sheets, are composite materials whose components have different coefficients of thermal expansion. When the temperature changes, the deformation of the active layer is greater than that of the passive layer. As a result, the entire bimetallic sheet will bend towards the passive layer, and the curvature of this composite material will change, thus producing deformation.

[0056] In this embodiment, since the bimetallic strip is connected to the control circuit, current can pass through the bimetallic strip. When an overload occurs, the bimetallic strip heats up and deforms. The end of the bimetallic strip connected to the opening and closing assembly then drives the opening and closing assembly to open, thus playing the role of overload protection.

[0057] Based on the above implementation method, in a specific implementation method, an arc-extinguishing chamber 21 is provided on one side of the circuit breaker assembly, which is used to extinguish the arc when the circuit breaker is disconnected from the circuit, accelerate the extinction of the arc, and protect the circuit breaker.

[0058] Based on the above embodiments, in a specific embodiment, the first transmission component includes a reduction gear assembly 7 and a first sector gear 8 distributed along the length direction of the strip-shaped housing 1; the electric drive structure is driven and connected to the reduction gear assembly 7, the reduction gear assembly 7 is meshed with the first sector gear 8, the lever 4 is located within the transmission trajectory of the reduction gear assembly 7, and the lever 4 is triggered to rotate when the reduction gear assembly 7 is driven in the second direction; the first sector gear 8 is connected to the latch 3, and the first sector gear 8 drives the latch 3 to lock when driven in the first direction, thereby realizing the electric closing operation.

[0059] It should be noted that the first sector gear 8 is rotatably connected to the end of the latch away from the drive rod.

[0060] In this embodiment, the reduction gear assembly 7 is driven by an electric drive structure to transmit power along the second direction. During the transmission process, the lever 4 is triggered to rotate. During the rotation of the reduction gear assembly 7 along the second direction, it can mesh with the first sector gear 8, thereby driving the first sector gear 8 to transmit power along the first direction, thereby driving the latch 3 to lock and realize the electric closing operation. The reduction gear assembly 7 can increase the transmission torque during the low-speed transmission process, making the transmission smoother. At the same time, it can realize both electric opening and electric closing operations.

[0061] Based on the above embodiments, in a specific embodiment, the electric drive structure includes a drive motor 5; the reduction gear assembly 7 includes a gear set 701 and a toggle gear 702 distributed along the length direction of the strip-shaped housing 1; the drive motor 5 meshes with the gear set 701 through a worm gear 6, and the gear set 701 meshes with the toggle gear 702; one end of the toggle gear 702 protrudes outward and is provided with a toggle block 703, and the toggle block 703 rotates with the toggle gear 702 and can abut against one end of the lever 4 to drive the lever 4 to rotate; a second sector gear 704 is coaxially provided at the end of the toggle gear 702 away from the toggle block 703, and the first sector gear 8 meshes with the second sector gear 704.

[0062] It should be noted that the end of the lever 4 near the actuating gear 702 is on the movement path of the actuating block 703 as it rotates with the actuating gear 702. The latch 3 has a first position where it rotates in the first direction to reach the locked state and a second position where it rotates in the second direction to reach the unlocked state. The first sector gear 8 has a third position where it drives the latch 3 to the first position along the first direction and a fourth position where it drives the latch to the second position along the second direction.

[0063] In this embodiment, during the release, the drive motor 5 drives the worm gear 6 to rotate, which in turn drives the gear set 701 and the actuating gear 702 to rotate. The reduction gear assembly 7 can increase the torque at low speeds, making it easier to push the lever 4 to rotate. At this time, the actuating gear 702 rotates in the second direction. During the rotation of the actuating gear 702, the actuating block 703 rotates together. When it moves to the predetermined position, it contacts one end of the lever 4, and then pushes the lever 4 to rotate in the first direction, thereby causing the other end of the lever 4 to rotate. Under the rotation of the lever 4, the drive rod in the instantaneous protection assembly 2 pushes the latch 3 to release and unlock. The drive motor 5 can actively control the rotation of the second sector gear 704, which is coaxially set with the actuating gear 702, to mesh with the first sector gear 8 to drive the first sector gear 8 to rotate. The specific working process is as follows: when the second sector gear 704 rotates in the second direction and meshes with the first sector gear 8, it drives the first sector gear 8 to rotate in the first direction until it reaches the third position (e.g., Figure 1 As shown), the first sector gear 8 is in the third position, and engagement is complete. At this time, the latch 3 is in the first position, and the opening and closing assembly is closed. When the second sector gear 704 rotates in the first direction and engages with the first sector gear 8, it drives the first sector gear 8 to rotate in the second direction until it reaches the fourth position (as shown). Figure 2As shown, the first sector gear 8 is in the fourth position, and the engagement is complete. At this time, the latch 3 is in the second position, and the circuit breaker is open. The circuit breaker is opened or closed by actively controlling the circuit breaker through the drive motor 5. This allows for intelligent control and saves manpower. When the second sector gear 704 rotates in the second direction and engages with the first sector gear 8, it drives the first sector gear 8 to rotate in the first direction until it reaches the third position. If the second sector gear 704 continues to rotate, the first sector gear 8 will not engage with the second sector gear 704. The rotation of the first sector gear 8 in the first or second direction is not affected by the second sector gear 704. Through the transmission of the reduction gear assembly 7, the latch 3 can be locked electrically or unlocked actively. The assembly structure is simple, improving space utilization and functional versatility.

[0064] In the specific implementation, when the second sector gear 704 rotates in the second direction and meshes with the first sector gear 8, driving the first sector gear 8 to rotate in the first direction until it reaches the third position, when the latch 3 closes, if it is to be released, the toggle gear 702 is driven to rotate, which drives the lever 4 to cooperate with the instantaneous protection component 2 to release, so that the opening and closing component opens. The structure is simple and the control accuracy is higher.

[0065] Preferably, such as Figure 1 and Figure 2 As shown, the instantaneous protection component 2 and the first sector gear are staggered in the width direction of the strip-shaped housing 1. The first sector gear 8 is located below the instantaneous protection component 2. This arrangement improves the rationality of the spatial arrangement and allows for long-distance control of the latch 3.

[0066] Based on the above embodiments, in a specific embodiment, the handle operation assembly includes a handle 16 and a first connecting member 14; the second transmission assembly includes a rotating member 19, which is rotatably connected to the strip-shaped housing 1 and connected to the latch 3; one end of the first connecting member 14 is connected to the handle 16, and the other end is rotatably connected to the rotating member 19 away from the axis, so that the rotating member 19 can be rotated by the handle 16 to lock or unlock the latch 3.

[0067] It should be noted that the rotating part 19 is rotatably connected to the end of the latch away from the drive rod.

[0068] In this embodiment, the first connecting member 14 can be pulled or pushed in a direction away from or towards the first sector gear 8 by the switching action of the handle 16, thereby causing the first connecting member 14 to pull or push the rotating member 19, applying a lateral force to the rotating member 19, causing the rotating member 19 to rotate along the axis, thereby rotating the rotating member 19 in the first direction to lock the latch 3 or rotating in the second direction to unlock the latch 3.

[0069] Based on the above implementation, in a specific implementation, the rotating member 19 is coaxially connected to the first sector gear 8, and the rotating member 19 is connected to the latch 3 through the second connecting member 15; one end of the second connecting member 15 is rotatably connected to the rotating member 19 away from the axis, and the other end is rotatably connected to the end of the latch 3 away from the drive rod, so as to drive the latch 3 to lock or unlock.

[0070] It should be noted that the lever 4 is connected to the first sector gear 8 away from the axis, so that the lock 3 can be pulled when the first sector gear 8 rotates.

[0071] In this embodiment, the rotating member 19 rotates coaxially with the first sector gear 8. When rotating in the first direction, it drives the second connecting member 15 to move closer to the latch 3. The second connecting member 15 then pushes the latch 3 to rotate in the second direction to reach the locked state, realizing the closing of the circuit breaker assembly. At this time, the latch 3 is in the first position and abuts against the driving member. When the first sector gear 8 rotates in the second direction, it drives the second connecting member 15 to move away from the latch 3. The second connecting member 15 then pulls the latch 3 to rotate in the first direction to reach the unlocked state, realizing the tripping and opening of the circuit breaker. At this time, the latch... Position 3 is in the second position. The rotating part 19 is coaxially arranged with the first sector gear 8 to serve as a transition. It connects to the handle operation assembly. When the drive motor 5 drives the reduction gear assembly 7 to rotate the first sector gear 8, it can achieve electric closing. Manual opening or closing operation can also be achieved through the cooperation of the handle 16 and the rotating part 19. Both are achieved by rotating the rotating part 19 and the first sector gear 8 coaxially. This serves as a transition connection and improves the rationality of the arrangement of various components in the narrow space of the circuit breaker. At the same time, the latch 3 can be controlled over a long distance.

[0072] Furthermore, the handle operation component, electric drive structure, first transmission component, lever 4, instantaneous protection component 2, and opening / closing component are distributed sequentially along the length direction. By arranging the electric drive structure, first transmission component, lever 4, instantaneous protection component 2, and latch 3 sequentially along the length direction of the circuit breaker, each component can be reasonably arranged within the strip-shaped housing 1, while ensuring the performance of each component.

[0073] Based on the above implementation, in a specific implementation, the center lines of the toggle block 703 and the second sector gear 704 are spaced at a predetermined angle in the circumferential direction.

[0074] In this embodiment, by arranging the center lines of the actuating block 703 and the second sector gear 704 at a predetermined angle in the circumferential direction, it is possible to avoid the situation where the actuating block 703 and the push lever 4 rotate at the same time as the first sector gear 8 and the second sector gear are meshing, which would cause the latch 3 to be unable to close the circuit due to both needing to rotate to the second direction to lock and being pushed by the drive rod.

[0075] Preferably, the gear portion of the second sector gear 704 is set before the toggle block 703 in the second direction, so that after the second sector gear 704 drives the first sector gear 8 to close the circuit breaker, the toggle block 703 can then be used to release and unlock the circuit breaker.

[0076] Based on the above embodiments, in a specific embodiment, a first micro switch 10 and a second micro switch 11 are arranged sequentially along the second direction. The first micro switch 10 is used to detect whether the first sector gear 8 is in the fourth position, and the second micro switch is used to detect whether the first sector gear 8 is in the third position. The first micro switch 10 and the second micro switch 11 are respectively arranged in the strip-shaped housing 1 at a preset angle along the outer periphery of the first sector gear 8. The tooth surface of the first sector gear 8 is provided with a first protrusion 17 and a second protrusion 18 corresponding to the first micro switch 10 and the second micro switch 11, respectively.

[0077] In this embodiment, the rotation of the first sector gear 8 drives the rotation of the first protrusion 17 and the second protrusion 18. When the first protrusion 17 contacts the first micro switch 10, the first sector gear 8 is detected to be in the fourth position. At this time, the latch 3 is in the second position, and the circuit breaker is in the open state. When the second protrusion 18 contacts the second micro switch 11, the first sector gear 8 is detected to be in the third position. At this time, the latch 3 is in the first position, and the circuit breaker is in the closed state, which facilitates the detection of the circuit breaker's status.

[0078] Based on the above embodiments, in a specific embodiment, a third micro switch 12 and a fourth micro switch 13 are arranged sequentially at preset angles along the second direction. The third micro switch 12 is used to detect whether the second sector gear 704 is in a disengaged position from the first sector gear 8 when rotating along the second direction, and the fourth micro switch 13 is used to detect whether the toggle block 703 drives the lever 4 to rotate to a position where the lock 3 is just disengaged and unlocked. The third micro switch 12 and the fourth micro switch 13 are respectively arranged on one side of the strip-shaped housing 1 corresponding to the toggle gear 702 and the toggle block 703.

[0079] In this embodiment, the actuating gear 702 rotates in the second direction, causing the second sector gear 704 to mesh with the first sector gear 8. When the second sector gear 704 continues to rotate and the meshing with the first sector gear 8 ends and disengages, the actuating block 703 reaches the position of the third micro switch 12. The third micro switch 12 detects the actuating block 703 and detects the current state as the yielding position. At this time, the second sector gear 704 is not on the movement path of the first sector gear 8, and the rotation of the first sector gear 8 will not mesh with the second sector gear 704. The actuating gear 702 continues to rotate in the second direction. When the actuating block 703 reaches the position of the fourth micro switch 13, the fourth micro switch 13 detects the actuating block 703. At this time, the detection is that the actuating block 703 drives the lever 4 to rotate, just enough to make the latch 3 disengage and unlock.

[0080] Based on the above embodiments, in a specific embodiment, a limiting member 9 is provided inside the strip-shaped housing 1 on the side of the lever 4 away from the latch 3.

[0081] In this embodiment, the limiting member 9 limits the rotation of the lever 4 in the second direction to prevent the lever 4 from rotating too much in the second direction, which would prevent the first transmission component from contacting the lever 4 and transmitting power.

[0082] In this embodiment, the specific working principle of the circuit breaker's tripping mechanism is as follows: the drive motor 5 drives the worm gear 6, the worm gear 6 drives the gear set 701 to rotate, and the gear set 701 drives the actuating gear 702 to rotate in the second direction, thereby driving the coaxial second sector gear 704 to rotate in the second direction. If the first micro switch 10 detects that the first sector gear 8 is in the fourth position at this time, the latch 3 is in the tripped state, that is, in the second position. Then, the second sector gear 704 will continue to rotate and mesh with the first sector gear 8, driving the first sector gear 8 to rotate. Since the first sector gear 8 is coaxially arranged with the rotating part 19, the first sector gear 8 can rotate through... The second connecting piece 15 drives the latch 3 to rotate until the second micro switch 11 detects that the first sector gear 8 is in the third position. At this time, the latch 3 is in the first position, the circuit breaker is in the closed state, and the toggle gear 702 continues to rotate in the second direction. The second sector gear 704 separates from the first sector gear 8. When the third micro switch 12 detects the toggle block 703, it is in the yielding position. At this time, the handle 16 drives the first connecting piece 14 to drive the rotating piece 19 to drive the first sector gear 8 to rotate, which is not affected by the second sector gear 704. The rotating piece 19 can be manually driven to rotate by the handle to drive the second connecting piece 15. The drive latch 3 controls the closing or opening of the circuit breaker assembly. Then, the actuating gear 702 continues to rotate in the second direction, causing the actuating block 703 to abut against the end of the lever 4 near the first transmission assembly, driving the lever 4 to rotate in the first direction. The other end of the lever 4 pushes the moving iron core 201 to slide towards the latch 3 within the mounting base 203, thus releasing the latch 3 via the drive rod. Alternatively, the other end of the lever 4 can directly push the drive rod to release the latch 3. When the actuating gear 702 rotates to the point where the fourth micro switch 13 detects the actuating block 703, the detection of the actuating block 703 causes the lever 4 to rotate, just enough to lock the latch 3. When latch 3 is released, the latch is disengaged. If the actuating gear 702 continues to rotate in the second direction and disengages from the lever 4, or if it drives the actuating block 703 to rotate in the first direction, the lever 4 will not be subjected to force in the reverse direction. Under the action of the return spring 202, it pushes the limiting flange 205, which in turn pushes the moving iron core 201 to slide towards the lever 4, thereby pushing the lever 4 to rotate in the second direction until it contacts the limiting member 9. Both the moving iron core 201 and the lever 4 return to their initial state. At the same time, the rotating member 19 is coaxially set with the first sector gear 8 and rotates synchronously, playing an intermediate transmission transition role, which can save space and improve the rationality of spatial layout. This solves the technical problem of controlling the latch in long strip circuit breakers, where the internal space of the circuit breaker is narrow and the various structural components are distributed along the length of the circuit breaker at long distances.

[0083] Example 3

[0084] This embodiment provides a circuit breaker, including the tripping mechanism of any of the circuit breakers described in the above embodiments.

[0085] In this embodiment, the tripping mechanism of the circuit breaker allows the various structural components to be arranged reasonably within the circuit breaker, enabling long-distance control of the latch 3 for tripping, improving control accuracy and the rationality of the arrangement, and allowing the latch 3 to be tripped and opened in a timely manner in the event of a fault.

[0086] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A tripping mechanism for a circuit breaker, the circuit breaker comprising a strip-shaped housing (1), characterized in that, The tripping mechanism of the circuit breaker includes a handle operation assembly, an electric drive structure, a first transmission assembly, a lever (4), an instantaneous protection assembly (2), and a switching assembly, all housed within the strip-shaped housing (1). The circuit breaker assembly has a closed state and a closed state. In the closed state, its latch (3) is locked, and in the closed state, its latch (3) is unlocked. The handle operation component is connected to the opening and closing component through the second transmission component, and is used to realize manual opening or closing operation; The electric drive structure is connected to the opening and closing assembly through the first transmission component. Under the action of the electric drive structure, the first transmission component drives the opening and closing assembly to close the circuit to realize the electric closing operation. The lever (4) is rotatably connected to the strip-shaped housing (1), and the lever (4) is located within the transmission trajectory of the first transmission component. When the first transmission component transmits along the second direction, it triggers the lever (4) to rotate. The instantaneous protection component (2) has a drive rod located between the lever (4) and the latch (3), which pushes the latch (3) to unlock under the rotation of the lever (4) to realize the electric tripping operation; The strip-shaped housing (1) has a limiting member (9) for limiting the lever (4) on the side away from the latch (3).

2. The tripping mechanism of the circuit breaker according to claim 1, characterized in that, The instantaneous protection component (2) includes a moving iron core (201), a return spring (202), and a mounting base (203); the mounting base (203) is fixedly connected to the strip-shaped housing (1); the moving iron core (201) is slidably disposed within the mounting base (203), one end of the moving iron core (201) extends out of one end of the mounting base (203) and abuts against the end of the lever (4) away from the first transmission component, and the other end is integrally connected to the drive rod, the drive rod extending out of the... The other end of the mounting base (203) is used to push the latch (3) to unlock; the outer periphery of the moving iron core (201) is provided with a limiting flange (205), the return spring (202) is sleeved on the moving iron core (201), one end of the return spring (202) abuts against the end of the mounting base (203) near the latch (3), and the other end abuts against the limiting flange (205); the outer side of the mounting base (203) is provided with a coil group (206) corresponding to the moving iron core (201).

3. The tripping mechanism of the circuit breaker according to claim 1, characterized in that, The instantaneous protection component (2) includes a moving iron core (201), a return spring (202), and a mounting base (203); the mounting base (203) is fixedly connected to the strip-shaped housing (1); the moving iron core (201) is slidably disposed in the mounting base (203), and one end of the moving iron core (201) near the latch extends out of the mounting base (203) to push the latch (3) to unlock; a limiting flange (205) is provided on the outer periphery of the moving iron core (201), and the return spring (202) is sleeved on the moving iron core (201), one end of the return spring (202) abuts against the end of the mounting base (203) near the latch (3), and the other end abuts against the limiting flange (205); a coil group (206) is sleeved on the outer side of the mounting base (203) corresponding to the moving iron core (201). The drive rod passes through the interior of the moving iron core and is slidably connected to the moving iron core; wherein, one end of the drive rod extends out of one end of the mounting base (203) and abuts against the end of the lever (4) away from the first transmission component, and the other end extends out of the other end of the mounting base (203) to push the latch (3) to unlock.

4. The tripping mechanism of the circuit breaker according to any one of claims 1-3, characterized in that, The first transmission assembly includes a reduction gear assembly (7) and a first sector gear (8) distributed along the length of the strip-shaped housing (1); the electric drive structure is driven to the reduction gear assembly (7), the reduction gear assembly (7) is meshed with the first sector gear (8), the lever (4) is located within the transmission trajectory of the reduction gear assembly (7), and the lever (4) is triggered to rotate when the reduction gear assembly (7) is driven in the second direction; the first sector gear (8) is connected to the latch, and the first sector gear (8) drives the latch (3) to lock in the first direction, thereby realizing the electric closing operation.

5. The tripping mechanism of the circuit breaker according to claim 4, characterized in that, The electric drive structure includes a drive motor (5); The reduction gear assembly (7) includes a gear set (701) and a drive gear (702) distributed along the length of the strip-shaped housing (1). The drive motor (5) meshes with the gear set (701) via a worm gear (6), and the gear set (701) meshes with the actuating gear (702); One end of the actuating gear (702) protrudes outward and is provided with an actuating block (703), and the actuating block (703) rotates with the actuating gear (702) and can abut against one end of the lever (4) to drive the lever (4) to rotate; The actuating gear (702) is coaxially provided with a second sector gear (704) at one end away from the actuating block (703), and the first sector gear (8) meshes with the second sector gear (704).

6. The tripping mechanism of the circuit breaker according to claim 5, characterized in that, The handle operation assembly includes a handle (16) and a first connector (14). The second transmission assembly includes a rotating component (19), which is rotatably connected to the strip-shaped housing (1) and connected to the latch (3); One end of the first connector (14) is connected to the handle (16), and the other end is rotatably connected to the rotating part (19) away from the axis. The handle (16) can drive the rotating part (19) to rotate so as to lock or unlock the latch (3).

7. The tripping mechanism of the circuit breaker according to claim 6, characterized in that, The rotating part (19) is coaxially connected to the first sector gear (8), and the rotating part (19) is connected to the latch (3) through the second connecting part (15); One end of the second connector (15) is rotatably connected to the rotating member (19) away from the axis, and the other end is rotatably connected to the end of the latch (3) away from the drive rod, so as to drive the latch (3) to lock or unlock.

8. The tripping mechanism of the circuit breaker according to claim 5, characterized in that, The center lines of the actuating block (703) and the second sector gear (704) are spaced at a predetermined angle in the circumferential direction.

9. A circuit breaker, characterized in that, Includes the tripping mechanism of the circuit breaker as described in any one of claims 1-8.

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