A combined circuit breaker

Abstract

This invention discloses a combined circuit breaker, belonging to the field of electrical control switch technology. It includes a housing assembly, a switch module, a trigger module, and a tripping module. All three modules are assembled within the housing assembly. The switch module has relative instantaneous opening and closing functions and no relative dead points on its sliding path. The trigger module has relative on / off states and is used to coordinate with the switch module to control the conduction of the circuit. The tripping module is used to adjust the on / off states of the trigger module. By incorporating the switch module, trigger module, and tripping module, this invention enables controllable storage and release of energy during the opening and closing operation cycle of the switching device using a pre-compressed elastic energy storage element. This drives the contacts to perform a closing action, ensuring that the contacts complete the closing process at a constant speed unaffected by the speed and force of human movement. This significantly reduces the arcing time during the closing process, effectively suppresses electrolytic corrosion, and extends electrical life.

Description

Technical Field

[0001] This invention belongs to the field of electrical control switch technology, specifically relating to a combined circuit breaker. Background Technology

[0002] A combined circuit breaker is a design that integrates short-circuit instantaneous protection and overload time-delay protection functions.

[0003] Chinese Patent Publication No. CN109545630B discloses an operating mechanism for a circuit breaker accessory, a circuit breaker accessory, and a combined circuit breaker, including a mounting bracket; a tripping member, an assembly shaft, and a first reset member, wherein the tripping member is movably mounted on the mounting bracket, and the assembly shaft is fixedly mounted on the tripping member; a tripping member rotatably mounted on the tripping member; a driving member movably mounted on the mounting bracket and connected to the tripping member; and a tripping device having a first state and a second state. When the tripping device is in the first state, during the movement of the driving member to the fourth position, the tripping device can provide a support point to the tripping member, causing the tripping member to rotate around the support point under the action of the driving member, thereby driving the tripping member to move to the second position; when the tripping device is in the second state, the tripping device is separated from the tripping member.

[0004] In actual use, the circuit breaker described above has an uncontrollable travel time from the contact entering the pre-breakdown region to achieving physical contact. This significantly increases the dwell time of the contact gap within the critical range of arc voltage during manual intermittent connection, increases the accumulation of arc energy and the duration of arc combustion, and further reduces the service life of the contacts. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a combined circuit breaker to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A combined circuit breaker includes a housing assembly, a switch module, a trigger module, and a tripping module. The switch module, trigger module, and tripping module are all assembled inside the housing assembly. The housing assembly includes a circuit breaker housing and a guide rail groove. The guide rail groove is provided on one side of the circuit breaker housing.

[0008] The switch module has a relative instantaneous opening and closing function, and the switch module has no relative dead point position on the sliding path;

[0009] The trigger module has a relative on / off state, which is used to cooperate with the switch module to control the conduction of the circuit;

[0010] The circuit breaker module is used to adjust the on / off state of the trigger module.

[0011] As a further embodiment of the present invention, the housing assembly further includes a slot, a telescopic member, a sliding plate, a linkage rod, and a drive rod. The slot is disposed on one side of the guide rail slot. The telescopic member is elastically inserted into the slot. A sliding plate is also fixedly arranged on the telescopic member. One end of the linkage rod is rotatably connected to the sliding plate, and the other end of the linkage rod is rotatably connected to the drive rod. The drive rod is slidably mounted on the circuit breaker housing.

[0012] As a further embodiment of the present invention, the switch module includes a switch assembly, which includes a switch body, a side slide rod, a fixed housing, a shaft groove, a positioning pin, and a sliding head. The switch body is slidably mounted in the slot, one end of the side slide rod is rotatably connected to the switch body, the fixed housing is fixedly disposed in the circuit breaker housing and the side slide rod slides through the fixed housing, the side slide rod is also provided with a shaft groove, one end of the positioning pin is fixedly mounted in the fixed housing and the other end of the positioning pin is slidably disposed in the shaft groove, and a sliding head is also fixedly disposed at the end of the side slide rod.

[0013] As a further embodiment of the present invention, the switch assembly further includes a top support and an inclined guide groove. The top support is fixedly arranged on one side of the side slide rod, and the inclined guide groove is inclinedly arranged in the circuit breaker housing and slides against the sliding head.

[0014] As a further embodiment of the present invention, the trigger module includes a trigger assembly, which includes a shaft, a trigger wheel, a first convex groove, and a stop bar. The shaft is elastically rotatably disposed in the circuit breaker housing, and the trigger wheel is limited and slidably assembled on the shaft. One end of the trigger wheel is also provided with a first convex groove, which is disposed on the side near the drive rod. The stop bar is fixedly disposed in the circuit breaker housing and movably abuts against the first convex groove.

[0015] As a further embodiment of the present invention, the trigger assembly further includes a second protrusion, a transmission rod, a contact connecting rod, and a sliding surface. One end of the trigger wheel is also provided with a second protrusion, one end of the transmission rod is inserted into the trigger wheel, and the other end of the transmission rod is rotatably connected to the contact connecting rod. The trigger wheel is also provided with a sliding surface near the shaft side.

[0016] As a further embodiment of the present invention, the trigger module further includes a reset assembly, which includes a reset plate, a front baffle, a rear baffle, a connecting rod, a shaped plate, and an arc-shaped segment. The reset plate is rotatably disposed in the circuit breaker housing. A front baffle is fixedly connected to one side of the reset plate, and the front baffle is disposed near the top support. A rear baffle is fixedly connected to the other end of the reset plate. A connecting rod is connected to the end of the rear baffle. A shaped plate is fixedly mounted on the connecting rod, and an arc-shaped segment is disposed on the side of the shaped plate facing the trigger wheel.

[0017] As a further embodiment of the present invention, the circuit breaker module includes a protection component, which includes a short-circuit trigger rod, an inclined plate, and a toggle rod. The short-circuit trigger rod is fixedly arranged in the circuit breaker housing. One end of the short-circuit trigger rod is fixedly connected to the inclined plate, and the other end of the short-circuit trigger rod is provided with a toggle rod, which movably abuts against the second protrusion.

[0018] As a further embodiment of the present invention, the circuit breaker module further includes an electromagnetic coil and an armature. The electromagnetic coil is disposed in the circuit breaker housing, and the armature is slidably mounted in the electromagnetic coil. The armature is in movable contact with the inclined plate.

[0019] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0020] This invention, by incorporating a switch module, a trigger module, and a tripping module, enables the controlled storage and release of energy during the opening and closing operation cycle of the switchgear. This energy is then used to drive the contacts to perform a closing action, ensuring that the contacts complete the closing process at a constant speed unaffected by the speed and force of human movement. This significantly reduces the arcing time during the closing process, effectively suppresses electro-erosion, and ultimately achieves the design objective of protecting the contact surface and extending electrical life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a combined circuit breaker provided in one embodiment of the present invention.

[0022] Figure 2 This is a partial cross-sectional view of a combined circuit breaker provided in one embodiment of the present invention.

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of reference numeral A in the attached figure.

[0024] Figure 4 This is a partial cross-sectional view from another perspective of a combined circuit breaker provided in one embodiment of the present invention.

[0025] Figure 5 for Figure 4 Enlarged schematic diagram of reference numeral B in the attached figure.

[0026] Figure 6 This is a schematic diagram of the back structure of a combined circuit breaker provided in one embodiment of the present invention.

[0027] Figure 7 for Figure 6 Enlarged schematic diagram of the figure marked C in the attached diagram.

[0028] Figure 8This is a schematic diagram of the structure of a combined circuit breaker provided in one embodiment of the present invention.

[0029] Figure 9 for Figure 8 Enlarged schematic diagram of reference numeral D in the attached figure.

[0030] Reference numerals: 1-Housing assembly, 101-Circuit breaker housing, 102-Guide rail groove, 103-Hole groove, 104-Telescopic component, 105-Sliding plate, 106-Linkage rod, 107-Drive rod, 2-Switch assembly, 201-Switch body, 202-Side sliding rod, 203-Fixed housing, 204-Shaft groove, 205-Positioning pin, 206-Sliding head, 207-Top support, 208-Angled guide groove, 3-Trigger assembly, 301-Shaft, 30 2-Trigger wheel, 303-First groove, 304-Stop bar, 305-Second groove, 306-Transmission rod, 307-Contact connecting rod, 308-Sliding surface, 4-Reset assembly, 401-Reset plate, 402-Front baffle, 403-Rear baffle, 404-Connecting rod, 405-Irregular plate, 406-Arc segment, 5-Protection assembly, 501-Short circuit trigger rod, 502-Sloping plate, 503-Toggle rod, 6-Electromagnetic coil, 7-Armature. Detailed Implementation

[0031] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please see Figures 1-9 According to one embodiment of the present invention, a combined circuit breaker includes a housing assembly 1, a switch module, a trigger module, and a tripping module. The switch module, trigger module, and tripping module are all assembled inside the housing assembly 1. The housing assembly 1 includes a circuit breaker housing 101 and a guide rail groove 102. The guide rail groove 102 is provided on one side of the circuit breaker housing 101. The switch module has relative instantaneous opening and closing functions, and the switch module has no relative dead point position on the sliding path. The trigger module has relative on and off states, which are used to cooperate with the switch module to control the conduction of the circuit. The tripping module is used to adjust the on and off states of the trigger module.

[0033] In practical application, this embodiment utilizes an integrated torsion spring or compression spring within the switch module to achieve directional storage and controlled accumulation of mechanical potential energy during operation. When the operator drives the switch, causing the mechanism to reach a dead point position of a specific geometric configuration, the system is in a critical state of mechanical equilibrium. Once the operating torque overcomes the limitation corresponding to this dead point, the mechanism will experience motion instability. The elastic potential energy accumulated in the energy storage element will rapidly convert into mechanical kinetic energy in a sudden manner. This energy is efficiently transmitted to the contact mechanism through the linkage system, pushing the contact to accelerate along a preset guide structure, enabling it to achieve a very high and strictly controlled calibration speed at the closing end stage. The closing speed is entirely determined by the energy storage characteristics of the mechanism and the dynamic parameters of the kinematic chain, thus completely eliminating the influence of human operation force and speed fluctuations. Under this high-speed closing mechanism, the travel time from the contact entering the pre-breakdown area to achieving physical contact is compressed to an extremely short time, significantly reducing the dwell time of the contact gap in the critical domain of arc voltage. This compression of the time scale effectively reduces the time window required for the strength recovery of the gap medium, thereby fundamentally limiting the accumulation of arc energy and the duration of arc combustion. The electro-erosion phenomenon of the contact surface material during the closing process is significantly alleviated, thereby comprehensively improving its performance indicators of arc erosion resistance, and ultimately extending the electrical service life of the circuit breaker.

[0034] Please see Figure 2 and Figure 3 In a preferred embodiment of the present invention, the housing assembly 1 further includes a slot 103, a telescopic member 104, a sliding plate 105, a linkage rod 106, and a drive rod 107. The slot 103 is disposed on one side of the guide rail slot 102. The telescopic member 104 is elastically inserted into the slot 103. The sliding plate 105 is also fixedly arranged on the telescopic member 104. One end of the linkage rod 106 is rotatably connected to the sliding plate 105, and the other end of the linkage rod 106 is rotatably connected to the drive rod 107. The drive rod 107 is slidably mounted on the circuit breaker housing 101.

[0035] In practical application, the telescopic member 104, thanks to its built-in spring or elastic element-based automatic reset mechanism, can autonomously retract into the limited space of the guide slot 103 when not in operation. When performing the circuit breaker closing operation, the operator applies an upward vertical force to the switch module. During this upward stroke, the drive structure at the top of the switch module and the load-bearing interface of the telescopic member 104 form a rigid contact and force-locked connection, thereby pushing the telescopic member to overcome the preload of its internal elastic element and perform synchronous linear displacement along the axial direction of the guide slot. At the same time, the slider 105, which is mechanically fixed to the telescopic member 104, generates a translational movement strictly limited to the vertical direction under the geometric constraints of the precision guide slot or guide rail system. The linkage rod 1, which is connected to the side of the slider 105 by a hinge or slider mechanism, is also connected to the telescopic member 104. 06. The aforementioned linear motion is converted into precise angular displacement or linear output, which in turn transmits driving torque to the drive rod 107. This torque forces the drive rod 107 to complete a predetermined stroke of extension along its precision axis. Its motion trajectory is guided and supported by bearings or bushing structures. In this power transmission chain, the drive rod 107 converts linear displacement into the composite motion required by the trigger module through the connecting rod or other dedicated transmission mechanism integrated at its end. Ultimately, it drives the circuit breaker moving contact system to complete the predetermined motion trajectory from the open position to the closed position. The entire operation sequence adopts a multi-level linkage mechanism design to ensure that the core components such as the telescopic component, slider, linkage rod and drive rod achieve precise synchronization of motion sequence and continuity of force transmission within the limited stroke, thereby ensuring the dynamic stability and operational reliability of the circuit breaker state transition process at the mechanism level.

[0036] Please see Figure 4 and Figure 5 In a preferred embodiment of the present invention, the switch module includes a switch assembly 2, which includes a switch body 201, a side slide rod 202, a fixed shell 203, a shaft groove 204, a positioning pin 205, and a sliding head 206. The switch body 201 is slidably mounted in the slot 103. One end of the side slide rod 202 is rotatably connected to the switch body 201. The fixed shell 203 is fixedly arranged in the circuit breaker housing 101, and the side slide rod 202 slides through the fixed shell 203. The side slide rod 202 is also provided with a shaft groove 204. One end of the positioning pin 205 is fixedly mounted in the fixed shell 203, and the other end of the positioning pin 205 is slidably arranged in the shaft groove 204. The end of the side slide rod 202 is also fixedly provided with a sliding head 206.

[0037] In practical application, the switch body 201 is precisely assembled into the guide rail groove 102 through the limiting structures on both sides, allowing for linear displacement along a defined path. A rotatable sliding rod 202 is disposed on one side of the switch body 201. One end of this rod is hinged to the switch body 201 via a rotary joint, while the other end penetrates and is constrained within a fixed housing 203 mounted on the structure. The end of the sliding rod 202 near the fixed housing 203 has an axially extending shaft groove 204. This groove, together with a positioning pin 205 fixed to the housing, forms a sliding joint connection, thus subjecting the sliding rod 202 to dual constraints in both axial and rotational directions during movement. As the switch body 201 moves vertically along the guide rail groove 102 and gradually approaches the middle area of ​​the guide rail groove 102, the side slide rod 202 generates corresponding angular and axial displacements. During this process, the helical spring fitted on the outer diameter of the side slide rod 202 is continuously compressed, and its reaction force manifests as a gradually increasing motion resistance, forming an energy storage mechanism. This resistance reaches a critical state when the switch body 201 approaches and crosses the dead point position set by the mechanism. Once the displacement of the switch body 201 exceeds this dead point, the spring, which was originally in a compressed state, rapidly releases its stored elastic potential energy, which is converted into kinetic energy to propel the switch body 201 to accelerate its slide towards the other end of the guide rail groove 102. In the final stage, the switch body 201 impacts the telescopic member 104 installed at the end of the guide rail groove 102 at a high speed. Through this impact, the mechanical motion is transmitted to the telescopic member 104, which in turn drives the drive rod 107 connected to it to perform a predetermined action, realizing the rapid switching and power transmission of the mechanism.

[0038] Furthermore, the switch assembly 2 also includes a top support 207 and an inclined guide groove 208. The top support 207 is fixedly arranged on one side of the side slide rod 202, and the inclined guide groove 208 is inclinedly arranged in the circuit breaker housing 101 and slides against the sliding head 206. The top support 207 is fixedly assembled to one side of the side slide rod 202, serving as a support and force transmission function. The inclined guide groove 208 is installed inside the circuit breaker housing 101 at a preset angle, and its guide inclined surface forms a sliding fit with the sliding head 206. When the side slide rod 202 rotates around the positioning pin 205 as the rotation center, the sliding head 206, under the push of the top support 207, generates synchronous displacement along the axial direction of the side slide rod 202, causing it to... The sliding head 206 continuously abuts against the inclined guide surface of the inclined guide groove 208. Due to the inclined structural characteristics of the inclined guide groove 208, the sliding head 206 cannot form a stable static equilibrium position when sliding on its surface. That is, in any intermediate state, the reaction force of the guide surface on the sliding head 206 will form a torque that makes the mechanism tend to the extreme position. This structure ensures that no matter what transition position the switch body 201 is in during operation, once the force is released, the entire mechanism will move autonomously and definitively to the fully closed or fully open state under the guidance of the inclined guide groove 208. This effectively eliminates the risk of jamming caused by the mechanism stagnating in the intermediate position and greatly improves the operation reliability and state certainty of the switch module.

[0039] Please see Figure 3 In a preferred embodiment of the present invention, the trigger module includes a trigger assembly 3, which includes a shaft 301, a trigger wheel 302, a first groove 303, and a stop bar 304. The shaft 301 is elastically rotatably disposed in the circuit breaker housing 101, and the trigger wheel 302 is slidably mounted on the shaft 301. One end of the trigger wheel 302 is also provided with a first groove 303, which is disposed on the side near the drive rod 107. The stop bar 304 is fixedly disposed in the circuit breaker housing 101 and movably abuts against the first groove 303.

[0040] In practical application, the shaft 301 is rotatably mounted in the corresponding shaft hole of the circuit breaker housing 101 through the elastic support structures at both ends, forming an elastic rotating pair with automatic reset capability. The trigger wheel 302 is sleeved on the shaft 301 in a circumferentially limited and axially sliding manner. A guide keyway is provided between its inner hole and the shaft 301, allowing it to move axially within a certain range while maintaining synchronous rotation with the shaft 301. A first protrusion 303 with a specific contour is machined on the end face of the trigger wheel 302. This protrusion serves as a functional structure that interacts with the drive rod 107. In the default state where the circuit breaker is not subjected to external force, the compression spring or torsion spring assembled between the trigger wheel 302 and the housing 101 generates a certain biasing force. The trigger wheel 302 is continuously pressed against the stop rod 304 fixed to the housing. At this time, the trigger wheel 302 is mechanically constrained by the stop rod 304 and is in a stable disconnected position. The moving contact linked with it maintains the specified electrical isolation between itself and the corresponding terminal. When the external operating mechanism drives the drive rod 107 to move towards the first protrusion 303, the working surface of the drive rod 107 contacts the inclined surface or contour of the first protrusion 303 and applies a force. This force overcomes the preload of the spring and forces the trigger wheel 302 to rotate counterclockwise around the shaft 301. This rotational motion is transmitted through the linkage mechanism at the other end of the trigger wheel 302, and finally drives the moving contact to overcome the resistance of the reaction spring and move towards the stationary contact or terminal until the contact makes reliable contact, completing the circuit closing operation.

[0041] Please see Figure 7 In a preferred embodiment of the present invention, the trigger assembly 3 further includes a second protrusion 305, a transmission rod 306, a contact connecting rod 307, and a sliding surface 308. One end of the trigger wheel 302 is also provided with the second protrusion 305. One end of the transmission rod 306 is inserted into the trigger wheel 302, and the other end of the transmission rod 306 is rotatably connected to the contact connecting rod 307. The trigger wheel 302 is also provided with a sliding surface 308 near the shaft side.

[0042] In practical application, this embodiment features a second protrusion 305 on one side of the trigger wheel 302. A transmission rod 306 is precisely mounted on this protrusion, and its end is hinged to a contact link 307, thus forming a reliable linkage mechanism. When the trigger wheel 302 rotates to a specific angle to reach the conducting position, the second protrusion 305 pushes the transmission rod 306 in a linear motion, thereby driving the contact link 307 to produce a precise displacement. This linkage mechanism ultimately ensures a stable electrical contact between the moving contact mounted at the end of the contact link 307 and the stationary terminal. When the system needs to disconnect the circuit, the trigger wheel 302 will slide along its axial direction under the action of external force. This sliding will cause the transmission connection between the trigger wheel 302 and the drive rod 107 to disengage. At this time, under the restoring force of the pre-compression elastic element, the shaft 301 and the trigger wheel 302 fixed thereon will automatically reset from the conducting position to the disconnect reference position. During this reset process, the first protrusion 303 on the trigger wheel 302 will rotate back to the initial limit state that abuts against the mechanism stop rod 304. At the same time, the transmission rod 306 will pull the contact link 307 back synchronously as the trigger wheel 302 resets, thereby driving the moving contact at its end to completely separate from the terminal. This complete linkage mechanism ensures that the circuit breaker can quickly and reliably switch from the conducting state to the completely disconnected state, effectively cutting off the circuit flow path.

[0043] Please see Figure 5 and Figure 7 In a preferred embodiment of the present invention, the trigger module further includes a reset component 4, which includes a reset plate 401, a front baffle 402, a rear baffle 403, a connecting rod 404, a shaped plate 405, and an arc-shaped section 406. The reset plate 401 is rotatably disposed in the circuit breaker housing 101. The front baffle 402 is fixedly connected to one side of the reset plate 401. The front baffle 402 is disposed near the top support 207. The rear baffle 403 is fixedly connected to the other end of the reset plate 401. The connecting rod 404 is connected to the end of the rear baffle 403. The shaped plate 405 is fixedly mounted on the connecting rod 404. The arc-shaped section 406 is disposed on the side of the shaped plate 405 facing the trigger wheel 302.

[0044] In practical application, when the circuit breaker enters short-circuit protection mode due to fault current, its internal trigger wheel 302 will slide axially away from the working position engaged with the drive rod 107, causing the linkage of the mechanism to be interrupted. At this time, if the operator first pushes the switch body 201 from the trigger position back to the closed position to restore it to the closed state, and then applies operating force again to push the switch body 201 from the closed state to the open state, the top support 207 installed on the switch body 201 will form a dynamic contact with the front baffle 402 in the reset mechanism. This contact action further transmits torque to the reset plate 401 and its linked rear baffle 403, driving them to rotate around the pivot. During this rotation, the connecting rod 404 fixed to the end of the rear baffle 403 moves in an arc, and drives the irregular plate 405 fixed to it to move synchronously. As the plate rotates, the specific contour of the irregular plate 405 causes the transmission rod 306 to move along its preset trajectory, eventually sliding to form a stable contact with the sliding contact surface 308. As the switch body 201 continues to advance, the transmission rod 306, guided by the sliding contact surface 308, generates a lateral force, pushing the trigger wheel 302 to reset towards the side where the drive rod 107 is located. At the same time, the switch body 201 slides out of the contact state with the telescopic member 104 to release the constraint, while the drive rod 107 remains in its retracted state. With the precise coordination of the mechanism linkage, the trigger wheel 302 is accurately guided back to the initial engagement position. When the reset action is nearing completion, the arc section 406 on the irregular plate 405 slides away from the contact area along the tangential direction of the sliding contact surface 308, releasing the forced drive on the transmission rod 306. At this point, all the execution units inside the circuit breaker return to the initial standby state and can resume normal closing and protection functions.

[0045] Please see Figure 9 In a preferred embodiment of the present invention, the tripping module includes a protection component 5, which includes a short-circuit trigger rod 501, a ramp 502, and a toggle rod 503. The short-circuit trigger rod 501 is fixedly arranged in the circuit breaker housing 101. One end of the short-circuit trigger rod 501 is fixedly connected to the ramp 502, and the other end of the short-circuit trigger rod 501 is provided with a toggle rod 503. The toggle rod 503 is movably abutting against the second protrusion 305. The tripping module also includes an electromagnetic coil 6 and an armature 7. The electromagnetic coil 6 is disposed in the circuit breaker housing 101, and the armature 7 is slidably assembled in the electromagnetic coil 6. The armature 7 is movably abutting against the ramp 502.

[0046] In practical application, when a short-circuit fault occurs within the circuit breaker system, a massive fault current instantaneously flows through the circuit. Under the influence of this rapidly increasing current, the electromagnetic coil 6 generates a transient high-intensity magnetic field based on the principle of electromagnetic induction. The armature 7, typically made of magnetically conductive material, experiences a significant electromagnetic driving force under this magnetic field and undergoes rapid displacement along its axial direction. When the armature 7 moves forward to contact the inclined plate 502, a force perpendicular to the inclined plate is applied to its end. Due to the design of this inclined plate structure, this force can be decomposed into axial and tangential components along the short-circuit trigger rod 501, thereby pushing the short-circuit trigger rod 501 to deflect around its fixed axis. When the circuit breaker is in the normal open position, the actuating rod 503 mounted on the short-circuit trigger rod 501 and the trigger wheel 30... The second protrusion 305 on the 2 is in a spatially misaligned state, and there is no interaction between the two. However, when the circuit breaker switches to the closed state, the trigger wheel 302 rotates at a certain angle, so that the second protrusion 305 rotates exactly to the active area corresponding to the toggle lever 503. If a short circuit occurs at this time, the short circuit trigger lever 501 will drive the toggle lever 503 on it to move synchronously during the deflection process. The toggle lever 503 then embeds into the second protrusion 305 and applies a radial thrust to the trigger wheel 302, forcing it to rotate away from the drive lever 107. This rotation action is further transmitted to the operating mechanism through the linkage mechanism, which finally causes the contacts of the circuit breaker to separate quickly, thereby automatically and quickly switching the circuit breaker from the closed state to the safe open state, realizing a reliable short circuit protection function.

[0047] The above embodiments of the present invention provide a combined circuit breaker, which, by setting a switching module, a triggering module and a tripping module, enables the controllable storage and release of energy in the opening and closing operation cycle of the switching device by means of a pre-compressed elastic energy storage element, thereby driving the contacts to perform a closing action. This ensures that the contacts complete the closing process at a constant movement speed unaffected by the speed and force of human movement, thereby significantly reducing the arcing time during the closing process, effectively suppressing the occurrence of electro-erosion, and ultimately achieving the design objective of protecting the contact surface of the contacts and extending the electrical life.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined circuit breaker, characterized in that, The combined circuit breaker includes: a housing assembly, a switch module, a trigger module, and a tripping module. The switch module, trigger module, and tripping module are all assembled within the housing assembly. The housing assembly includes a circuit breaker housing and a guide rail groove, with the guide rail groove located on one side of the circuit breaker housing. The switch module has relative instantaneous opening and closing functions, and there are no relative dead points on the sliding path. The trigger module has relative on / off states, used to coordinate with the switch module to control the conduction of the circuit. The tripping module is used to adjust the on / off states of the trigger module. The switch module includes a switch assembly, which includes a switch body, a side slide rod, a fixed housing, a shaft groove, a positioning pin, and a sliding head. The switch body is slidably mounted in the groove. One end of the side slide rod is rotatably connected to the switch body. The fixed housing is fixedly installed in the circuit breaker housing, and the side slide rod slides through the fixed housing. The side slide rod is also provided with a shaft groove. One end of the positioning pin is fixedly installed in the fixed housing, and the other end of the positioning pin is slidably installed in the shaft groove. A sliding head is also fixedly installed at the end of the side slide rod. The switch assembly also includes a top support and an inclined guide groove. The top support is fixedly arranged on one side of the side slide rod, and the inclined guide groove is inclinedly arranged in the circuit breaker housing and slides against the sliding head. The trigger module includes a trigger assembly, which includes a shaft, a trigger wheel, a first groove, and a stop bar. The shaft is elastically rotatably disposed in the circuit breaker housing. The trigger wheel is limited and slidably assembled on the shaft. One end of the trigger wheel is also provided with a first groove, which is disposed near the drive rod. The stop bar is fixedly disposed in the circuit breaker housing and movably abuts against the first groove. The trigger assembly also includes a second protrusion, a transmission rod, a contact connecting rod, and a sliding surface. One end of the trigger wheel is also provided with a second protrusion, one end of the transmission rod is inserted into the trigger wheel, and the other end of the transmission rod is rotatably connected to the contact connecting rod. The trigger wheel is also provided with a sliding surface near the shaft side. The trigger module also includes a reset assembly, which includes a reset plate, a front baffle, a rear baffle, a connecting rod, a shaped plate, and an arc-shaped section. The reset plate is rotatably mounted in the circuit breaker housing. A front baffle is fixedly connected to one side of the reset plate, and the front baffle is located near the top support. A rear baffle is fixedly connected to the other end of the reset plate. A connecting rod is connected to the end of the rear baffle. A shaped plate is fixedly mounted on the connecting rod, and an arc-shaped section is provided on the side of the shaped plate facing the trigger wheel.

2. A combined circuit breaker according to claim 1, characterized in that, The housing assembly also includes a slot, a telescopic component, a sliding plate, a linkage rod, and a drive rod. The slot is located on one side of the guide rail slot. The telescopic component is elastically inserted into the slot. A sliding plate is also fixedly arranged on the telescopic component. One end of the linkage rod is rotatably connected to the sliding plate, and the other end of the linkage rod is rotatably connected to the drive rod. The drive rod is slidably mounted on the circuit breaker housing.

3. A combined circuit breaker according to claim 1, characterized in that, The circuit breaker module includes protection components. The protection assembly includes a short-circuit trigger rod, a ramp, and a toggle rod. The short-circuit trigger rod is fixedly mounted within the circuit breaker housing. One end of the short-circuit trigger rod is fixedly connected to an inclined plate, and the other end of the short-circuit trigger rod is provided with a toggle rod, the toggle rod being flexibly connected to the second protrusion. Actively reach out.

4. A combined circuit breaker according to claim 3, characterized in that, The circuit breaker module also includes an electromagnetic coil and an armature. The electromagnetic coil is disposed in the circuit breaker housing, and the armature is slidably assembled in the electromagnetic coil. The armature is in movable contact with the inclined plate.

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