CN219163307U - Tripping mechanism of circuit breaker and circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a tripping mechanism of a circuit breaker and the circuit breaker, wherein the circuit breaker comprises a strip-shaped shell, and the tripping mechanism of the circuit breaker comprises a handle operation assembly, an electric driving structure, a first transmission assembly, a deflector rod, an instantaneous protection assembly, a switching-on/off assembly and an overload protection assembly which are arranged in the strip-shaped shell; the opening and closing assembly is provided with a closing state and an opening state, wherein the lock catch of the opening and closing assembly is in a locking state in the closing state, and the lock catch of the opening and closing assembly is in an unlocking state in the opening state; an arc extinguishing chamber is arranged on one side of the opening and closing component; the handle operation assembly is connected with the opening and closing assembly through a second transmission assembly; the electric driving structure is connected with the opening and closing assembly through a first transmission assembly; the deflector rod is rotatably connected with the strip-shaped shell and is positioned in the transmission track of the first transmission assembly; the instantaneous protection assembly is provided with a driving rod positioned between the deflector rod and the lock catch. The technical problem that the lock catch is difficult to control to release and break the brake in long distance or fault is solved.

Description

Tripping mechanism of circuit breaker and circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a tripping mechanism of a circuit breaker and the circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. The circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a protection device, a shell and the like, wherein the protection device mainly comprises a tripping mechanism, the opening or closing of the circuit breaker can be controlled, and when the circuit breaker is short-circuited or severely overloaded, the opening can be carried out through the tripping mechanism.

The existing tripping mechanism drives the deflector rod to drive the lock catch to realize tripping through the reduction gear mechanism or to trip through the switch handle, so that manpower is saved, the lock catch is driven to be closed through the electric driving structure, however, in the long-strip-shaped circuit breaker, because the inner space of the circuit breaker is long and narrow, each structural member is distributed along the length direction of the circuit breaker, the arrangement distance is far, the lock catch is difficult to control or control with low precision in a long distance, and the lock catch cannot be controlled to be tripped and opened in time when faults occur.

Disclosure of Invention

The utility model provides a tripping mechanism of a circuit breaker and the circuit breaker, which solve the technical problems that in the strip-shaped circuit breaker, as the internal space of the circuit breaker is long and narrow, each structural member is distributed along the length direction of the circuit breaker, the arrangement distance is far, the control of a lock catch in a long distance is difficult or the control precision is low, and the lock catch cannot be controlled in time to trip and open the gate when a fault occurs.

In view of the above, a first aspect of the present utility model provides a trip mechanism of a circuit breaker, the circuit breaker including a strip-shaped housing, the trip mechanism of the circuit breaker including a handle operation assembly, an electric driving structure, a first transmission assembly, a lever, an instantaneous protection assembly, a switching-on/off assembly, and an overload protection assembly disposed in the strip-shaped housing;

the opening and closing assembly is provided with a closing state and a separating and closing state, the lock catch of the opening and closing assembly is in a locking state in the closing state, and the lock catch of the opening and closing assembly is in an unlocking state in the separating and closing state; an arc extinguishing chamber is arranged on one side of the opening and closing component and is used for extinguishing arc when the circuit breaker breaks a circuit;

the overload protection assembly is connected with the opening and closing assembly and is used for driving the opening and closing assembly to open when the circuit breaker is overloaded;

the handle operation assembly is connected with the opening and closing assembly through a second transmission assembly and is used for realizing manual opening or closing operation;

the electric driving structure is connected with the opening and closing assembly through the first transmission assembly, and the first transmission assembly is driven by the electric driving structure along a first direction to drive the opening and closing assembly to be closed so as to realize electric closing operation;

The deflector rod is rotatably connected with the strip-shaped shell, the deflector rod is positioned in the transmission track of the first transmission assembly, and the deflector rod is triggered to rotate when the first transmission assembly is transmitted along the second direction;

the instantaneous protection component is provided with a driving rod positioned between the deflector rod and the lock catch, and the lock catch is pushed to unlock under the rotation of the deflector rod so as to realize the electric brake-separating operation.

Optionally, the instantaneous protection component comprises a movable iron core, a reset spring and a mounting seat; the mounting seat is fixedly connected with the strip-shaped shell; the movable iron core is arranged in the mounting seat in a sliding manner, one end of the movable iron core extends out of one end of the mounting seat and is abutted against one end of the deflector rod, which is far away from the first transmission assembly, and the other end of the movable iron core is integrally connected with the driving rod which extends out of the other end of the mounting seat to push the lock catch to unlock; the periphery of the movable iron core is provided with a limit flange, the reset spring is sleeved on the movable iron core, one end of the reset spring is abutted with one end of the mounting seat, which is close to the lock catch, and the other end of the reset spring is abutted with the limit flange; the outer side of the mounting seat is sleeved with a coil group corresponding to the movable iron core.

Optionally, the instantaneous protection component comprises a movable iron core, a reset spring and a mounting seat; the mounting seat is fixedly connected with the strip-shaped shell; the movable iron core is arranged in the mounting seat in a sliding manner, and one end, close to the lock catch, of the movable iron core extends out of the mounting seat to push the lock catch to unlock; the periphery of the movable iron core is provided with a limit flange, the reset spring is sleeved on the movable iron core, one end of the reset spring is abutted with one end of the mounting seat, which is close to the lock catch, and the other end of the reset spring is abutted with the limit flange; the outer side of the mounting seat is sleeved with a coil group corresponding to the movable iron core;

the driving rod is arranged in the movable iron core in a penetrating way and is in sliding connection with the movable iron core; one end of the driving rod extends out of one end of the mounting seat and is abutted with one end of the deflector rod, which is far away from the first transmission assembly, and the other end of the driving rod extends out of the other end of the mounting seat to push the lock catch to unlock.

Optionally, the first transmission assembly comprises a reduction gear assembly and a first sector gear distributed along the length direction of the strip-shaped shell; the electric driving structure is in driving connection with the speed reduction gear assembly, the speed reduction gear assembly is in meshed connection with the first sector gear, the deflector rod is positioned in a transmission track of the speed reduction gear assembly, and the speed reduction gear assembly triggers the deflector rod to rotate when transmitting in a second direction; the first sector gear is connected with the lock catch, and the first sector gear drives the lock catch to lock along a first direction in a transmission manner, so that electric closing operation is realized.

Optionally, the electric drive structure comprises a drive motor;

the speed reduction gear assembly comprises a gear set and a toggle gear which are distributed along the length direction of the strip-shaped shell;

the driving motor is meshed with the gear set through a worm, and the gear set is meshed with the toggle gear;

one end of the poking gear is provided with a poking block in an outward protruding mode, and the poking block rotates along with the poking gear and can be abutted with one end of the poking rod to drive the poking rod to rotate;

the one end that stir the gear is kept away from stir the piece is coaxial to be provided with the second sector gear, first sector gear with the second sector gear meshing.

Optionally, the handle operating assembly comprises a handle and a first connector;

the second transmission assembly comprises a rotating piece, the rotating piece is rotationally connected with the strip-shaped shell, and the rotating piece is connected with the lock catch;

one end of the first connecting piece is connected with the handle, the other end of the first connecting piece is connected with the rotating piece in a rotating way away from the axis, and the handle can drive the rotating piece to rotate so as to drive the lock catch to lock or unlock.

Optionally, the rotating piece is coaxially connected with the first sector gear, and the rotating piece is connected with the lock catch through a second connecting piece;

One end of the second connecting piece is rotationally connected with the rotating piece far away from the axis, and the other end of the second connecting piece is rotationally connected with one end of the lock catch far away from the driving rod, so that the lock catch is driven to be locked or unlocked.

Optionally, the stirring block and the center line of the second sector gear are circumferentially spaced at a preset angle.

Optionally, a limiting part for limiting the deflector rod is arranged in the strip-shaped shell at one side of the deflector rod, which is far away from the lock catch.

A second aspect of the utility model provides a circuit breaker comprising a trip mechanism of the circuit breaker as claimed in any one of the first aspects.

The technical scheme of the utility model has the following advantages:

according to the utility model, when the circuit breaker is switched on, namely the lock catch is in a locking state, the first transmission component is driven by the electric driving structure to transmit in the second direction, one end of the deflector rod is triggered and driven to rotate in the first direction in the transmission process, and the other end of the deflector rod is also driven to rotate in the first direction, so that the drive rod pushes one end of the lock catch close to the deflector rod to rotate in the first direction under the rotation of the deflector rod, and the lock catch is further rotated from the locking state to the unlocking state, thereby realizing the purpose of electric switching-on.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front view of a trip mechanism of a circuit breaker according to the present embodiment;

fig. 2 is a partial cross-sectional view of a trip mechanism of a circuit breaker according to the present embodiment;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a rear view of a trip mechanism of a circuit breaker according to the present embodiment.

Reference numerals illustrate:

1. a strip-shaped shell; 2. a transient protection component; 201. a movable iron core; 202. a return spring; 203. a mounting base; 204. a limiting block; 205. a limit flange; 206. a coil assembly; 3. locking; 4. a deflector rod; 5. a driving motor; 6. a worm; 7. a reduction gear assembly; 701. a gear set; 702. stirring the gear; 703. a poking block; 704. a second sector gear; 8. a first sector gear; 9. a limiting piece; 10. a first microswitch; 11. a second microswitch; 12. a third microswitch; 13. a fourth microswitch; 14. a first connector; 15. a second connector; 16. a handle; 17. a first protrusion; 18. a second protrusion; 19. a rotating member; 20. an overload protection assembly; 21. an arc extinguishing chamber.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

Referring to fig. 1 to 4, a trip mechanism of a circuit breaker includes a strip-shaped housing 1, and includes a handle operation assembly, an electric driving structure, a first transmission assembly, an instantaneous protection assembly 2, a deflector rod 4, an opening and closing assembly and an overload protection assembly 20 which are disposed in the strip-shaped housing 1: the opening and closing assembly is provided with a closing state and a separating and closing state, the lock catch 3 of the opening and closing assembly is in a locking state in the closing state, and the lock catch 3 of the opening and closing assembly is in an unlocking state in the separating and closing state; one side of the opening and closing assembly is provided with an arc extinguish chamber 21 for extinguishing arc when the circuit breaker breaks a circuit; the overload protection assembly 20 is connected with the opening and closing assembly and is used for driving the opening and closing assembly to open when the circuit breaker is overloaded; the handle operation assembly is connected with the opening and closing assembly through a second transmission assembly and is used for realizing manual opening and closing operation; the electric driving structure is connected with the opening and closing assembly through a first transmission assembly, and the first transmission assembly is driven to drive the opening and closing assembly to close along a first direction under the action of the electric driving structure so as to realize electric closing operation; the deflector rod 4 is rotatably connected with the strip-shaped shell 1, the deflector rod 4 is positioned in a transmission track of the first transmission assembly, and the deflector rod 4 is triggered to rotate when the first transmission assembly is transmitted along the second direction; the instantaneous protection component 2 is provided with a driving rod positioned between the deflector rod 4 and the lock catch 3, and the lock catch 3 is pushed to unlock under the rotation of the deflector rod 4 so as to realize the electric brake separating operation.

It should be noted that, the lock catch 3 is rotationally connected with the strip-shaped housing 1, and reaches the unlocked state or the locked state through rotation, the first direction refers to a direction in which one end of the lock catch 3, which is close to the driving lever 4, is turned away from the driving lever 4, the second direction refers to a direction in which one end of the lock catch 3, which is close to the driving lever 4, is turned toward the driving lever 4, i.e., as shown in fig. 1, the first direction is clockwise in the figure, when the lock catch 3 is in the locked state, one end of the lock catch 3 is close to the driving lever 4, and the second direction is anticlockwise in the figure, and when the lock catch 3 is in the unlocked state, one end of the lock catch 3 is far away from the driving lever 4.

In this embodiment, when the circuit breaker is closed, namely, when hasp 3 is in the locked state, drive first transmission subassembly through electric drive structure and follow the transmission of second direction, trigger and drive the one end of driving lever 4 in the transmission in-process and rotate along first direction, and the other end of driving lever 4 then rotates along first direction equally, thereby the one end that driving lever promotion hasp 3 is close to driving lever 4 rotates along first direction under the rotation of driving lever 4 so that hasp 3 rotates, and then change from the locked state to the unblock state, thereby realize the purpose of electronic brake breaking, drive the transmission of the intermediate process of hasp 3 unblock through driving lever 4 and instantaneous protection subassembly 2, improve the control distance of control hasp 3 release through electric drive structure, realize tripping in strip casing 1 long distance control hasp 3, space utilization rate has been improved and to the control accuracy of hasp 3, simultaneously if the condition of circuit breaker overload appears, overload protection subassembly 20 can in time drive the divide-shut brake subassembly and carry out the brake operation, and play the guard action, and can play the effect when circuit breaker and circuit breaker breaks off, and then change from the locked state, can drive the electronic brake handle, can drive the various control handle of the electronic brake, in addition, can realize the transmission of the control of the switch-on and the switch-off assembly, can realize the switch-on the side of the intelligent control of the switch-on operation, the switch-off assembly, the switch-off operation is realized through the intelligent control of the manual operation, the switch-off assembly, the switch-off operation is realized.

Example 2

As a further modification to embodiment 1, as shown in fig. 1 to 4, the instantaneous protection assembly 2 includes a plunger 201, a return spring 202, and a mount 203; the mounting seat 203 is fixedly connected with the strip-shaped shell 1; the movable iron core 201 is arranged in the mounting seat 203 in a sliding manner, one end of the movable iron core 201 extends out of one end of the mounting seat 203 and is in butt joint with one end of the deflector rod 4 away from the first transmission assembly, and the other end of the movable iron core is integrally connected with a driving rod which extends out of the other end of the mounting seat 203 to push the lock catch 3 to unlock; a limit flange 205 is arranged on the periphery of the movable iron core 201, a reset spring 202 is sleeved on the movable iron core 201, one end of the reset spring 202 is abutted with one end of the mounting seat 203, which is close to the lock catch 3, and the other end is abutted with the limit flange 205; a coil group 206 is sleeved on the outer side of the mounting seat 203 corresponding to the movable iron core 201.

It should be noted that, a control circuit suitable for being connected with the instantaneous protection component 2 is arranged in the strip-shaped shell 1; when the lock catch 3 is in a locking state, one end of the lock catch 3, which is close to the driving rod, is abutted with the driving rod; wherein the coil assembly 206 is connected to a control circuit.

In this embodiment, when the trip is performed, the electric driving structure drives the first transmission component to drive the shift lever 4 to rotate along the first direction, then the shift lever 4 pushes the movable iron core 201 to press the reset spring 202 in the mounting seat 203 to drive the driving lever to slide towards the lock catch 3, because the lock catch 3 is in contact with the driving lever at this time, the driving lever pushes the lock catch 3 to rotate along the first direction from the locked state to the unlocked state to realize the opening and closing component opening of the switch, after opening the switch, when one end of the shift lever 4 close to the first transmission component is not in contact with the first transmission component, the movable iron core 201 and one end of the shift lever 4 are not acted, the movable iron core 201 slides towards one side of the shift lever 4 under the action of the reset spring 202 pushing the limit flange 205, simultaneously pushes the shift lever 4 to rotate and reset along the second direction, at this time, because the driving lever follows the movable iron core 201 to slide towards one side of the shift lever 4, the driving rod is not on the path of the lock catch 3 rotating along the second direction, the lock catch 3 can rotate along the second direction to achieve a locking state to switch on the circuit breaker, in addition, when the circuit breaker has a short circuit fault, the control circuit can control the coil group 206 to electrify, the movable iron core 201 in the mounting seat 203 can be driven to slide along the direction of the lock catch 3 to drive the driving rod to push the lock catch 3 to rotate along the first direction to release and unlock, so that the circuit breaker is switched off, the reaction speed is faster, the protection function is achieved, when the control tripping is required to be actively carried out, the electric driving structure can be used, the movable iron core 201 at the moment plays the role of indirect mechanical transmission, the short circuit protection of the instantaneous protection component 2 is not influenced, the function diversity can be achieved, the transmission can be achieved to improve the control distance and the precision through the arrangement of the instantaneous protection component 2, and the short circuit protection function is achieved at the same time when the fault occurs, and do not affect each other.

As an alternative embodiment, the transient protection module 2 may include a plunger 201, a return spring 202, and a mount 203; the mounting seat 203 is fixedly connected with the strip-shaped shell 1; the movable iron core 201 is arranged in the mounting seat 203 in a sliding manner, and one end of the movable iron core 201, which is close to the lock catch, extends out of the mounting seat 203 to push the lock catch 3 to unlock; a limit flange 205 is arranged on the periphery of the movable iron core 201, a reset spring 202 is sleeved on the movable iron core 201, one end of the reset spring 202 is abutted with one end of the mounting seat 203, which is close to the lock catch 3, and the other end is abutted with the limit flange 205; a coil group 206 is sleeved on the outer side of the mounting seat 203 corresponding to the movable iron core 201; the driving rod is arranged inside the movable iron core 201 in a penetrating way and is in sliding connection with the movable iron core (not shown in the figure); wherein, one end of the driving rod extends out of one end of the mounting seat 203 and is abutted with one end of the driving rod 4 away from the first transmission component, and the other end extends out of the other end of the mounting seat 203 to push the lock catch 3 to unlock.

It should be noted that, a control circuit suitable for being connected with the instantaneous protection component 2 is arranged in the strip-shaped shell 1; when the lock catch 3 is in a locking state, one end of the lock catch 3, which is close to the driving rod, is abutted with the driving rod; wherein the coil assembly 206 is connected to a control circuit.

In this embodiment, when tripping, the first transmission component is driven by the electric driving structure to drive the driving rod 4 to rotate along the first direction, one end of the driving rod 4, which is abutted with the driving rod, pushes the driving rod to slide in the moving iron core 201, because the lock catch 3 is abutted with the driving rod at this time, the driving rod pushes the lock catch 3 to rotate along the first direction from the locking state to the unlocking state to realize the opening and closing component opening and closing, after opening and closing, one end of the driving rod, which is matched with the driving rod 4, has no acting force, at this time, the lock catch 3 can be manually closed under the action of the handle operation component or electrically closed under the action of the first transmission component, the lock catch 3 rotates towards the driving rod in the process of entering the locking state and is abutted with the driving rod again, meanwhile, pushes the driving rod to slide towards one side of the driving rod, and pushes the driving rod 4 to reset until the lock catch 3 is in the locking state, when the circuit breaker has a short circuit fault, the moving iron core 201 in the driving installation seat 203 compresses the reset spring 202 to slide towards the lock catch 3 to push the lock catch 3 to rotate along the first direction to release and unlock after opening and closing component, so that the opening and closing component is opened, and closing the opening and closing of the coil assembly is opened, and the opening and closing coil assembly is pushed by the moving iron core 201 to slide towards one side of the moving iron core, and the reset flange, and the reset coil is pushed by the moving iron core, and the moving coil 201. The driving rod and the movable iron core 201 are not affected by each other in the working process, when the active control is carried out on the trip and the brake is separated, the driving rod 4 is matched with the driving rod to carry out transmission, so that the lock catch 3 is tripped and unlocked, the long-distance control capability and the control precision are improved through mechanical transmission, when the fault short circuit occurs, the lock catch 3 is pushed by the movable iron core 201 to carry out trip and unlocking, the driving rod and the movable iron core 201 are separated and independently work, the service life of the instantaneous protection assembly 2 can be prolonged, and the normal protection effect when the fault occurs is ensured.

Preferably, a movable cavity is arranged in the mounting seat 203, and the movable iron core 201 is in sliding connection with the movable cavity; a limiting block 204 is arranged at one end of the movable cavity, which is close to the lock catch 3, a through hole is formed in the limiting block 204 along the movable direction of the movable iron core 201, a limiting protrusion is arranged in the through hole, and one end of the movable iron core 201 extends out of the mounting seat 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 limit protrusion. By arranging the limiting block 204 inside the movable cavity, the moving distance of the movable iron core 201 is limited.

Based on the above embodiment, in a specific embodiment, the overload protection assembly 20 includes a bimetal, one end of the bimetal is connected to the opening and closing assembly, the other end of the bimetal is fixedly connected to the strip-shaped housing 1 and is electrically connected to a control circuit, and the lock catch 3 in the opening and closing assembly can be driven to release and unlock under the overload condition of the circuit breaker, so that the opening and closing assembly is opened.

The bimetal is also called a thermal bimetal, and because of the different thermal expansion coefficients of the component layers, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetal is bent towards one side of the passive layer, and the curvature of the composite material changes to generate deformation.

In this embodiment, because the bimetallic strip is connected with the control circuit, there may be a current passing through the bimetallic strip, and when the current overload occurs, the bimetallic strip heats and deforms, and then drives the opening and closing assembly to open, so as to play a role in overload protection.

On the basis of the above embodiment, in a specific embodiment, an arc extinguishing chamber 21 is arranged on one side of the opening and closing component, and is used for accelerating the extinction of an arc when the circuit breaker is disconnected from a circuit, so as to protect the circuit breaker.

On the basis of the above embodiment, in a specific embodiment, the first transmission assembly 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 driving structure is in driving connection with the speed reduction gear assembly 7, the speed reduction gear assembly 7 is in meshed connection with the first sector gear 8, the deflector rod 4 is positioned in the transmission track of the speed reduction gear assembly 7, and the speed reduction gear assembly 7 triggers the deflector rod 4 to rotate when in transmission along the second direction; the first sector gear 8 is connected with the lock catch 3, and the first sector gear 8 drives the lock catch 3 to lock along the first direction transmission, so that the electric closing operation is realized.

The first sector gear 8 is rotatably connected to an end of the lock catch remote from the driving lever.

In this embodiment, the reduction gear assembly 7 is driven by the electric driving structure to drive along the second direction, the shift lever 4 is triggered to rotate in the transmission process, the reduction gear assembly 7 can be meshed with the first sector gear 8 for transmission in the rotation process along the second direction, and then the first sector gear 8 is driven to drive along the first direction, so that the lock catch 3 is driven to lock, the electric closing operation is realized, the transmission torque can be improved in the low-speed transmission process through the reduction gear assembly 7, the transmission is smoother, and meanwhile, the electric opening operation and the electric closing operation can be realized.

On the basis of the above embodiment, in a specific embodiment, the electric driving structure includes the driving motor 5; the reduction gear assembly 7 comprises a gear set 701 and a toggle gear 702 which are distributed along the length direction of the strip-shaped shell 1; the driving motor 5 is meshed with a gear set 701 through a worm 6, and the gear set 701 is meshed with a toggle gear 702; one end of the poking gear 702 is provided with a poking block 703 in an outward protruding way, and the poking block 703 rotates along with the poking gear 702 and can be abutted with one end of the poking rod 4 to drive the poking rod 4 to rotate; the end of the toggle gear 702 away from the toggle block 703 is coaxially provided with a second sector gear 704, and the first sector gear 8 is meshed with the second sector gear 704.

It should be noted that, on the movement path of the toggle block 703 along with the rotation of the toggle gear 702, the lock catch 3 specifically has a first position that rotates in the first direction to reach the locked state and a second position that rotates in the second direction to reach the unlocked state, and the first sector gear 8 has a third position that drives the lock catch 3 in the first direction to be in the first position and a fourth position that drives the lock catch in the second direction to be in the second position.

In this embodiment, when the trip is performed, the worm 6 is driven to rotate by the driving motor 5, so as to drive the gear set 701 and the toggle gear 702 to rotate, the torsion can be improved at a low rotation speed by the reduction gear assembly 7, so as to facilitate pushing the toggle lever 4 to rotate, at this moment, the toggle gear 702 rotates along the second direction, the toggle gear 702 drives the toggle block 703 to rotate together in the rotation process, when moving to a preset position, the toggle block contacts with one end of the toggle lever 4, then the toggle lever 4 is pushed to rotate along the first direction, so that the other end of the toggle lever 4 rotates, and the driving lever in the instantaneous protection assembly 2 pushes the lock catch 3 to perform trip unlocking under the rotation of the toggle lever 4; the second sector gear 704 coaxially arranged with the toggle gear 702 can be actively controlled to rotate by the driving motor 5, and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate, and the specific working process is as follows: when the second sector gear 704 rotates along the second direction and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate along the first direction until reaching the third position (as shown in fig. 1), the first sector gear 8 is positioned at the third position, the meshing is finished, the lock catch 3 is positioned at the first position, the opening and closing component is closed, when the second sector gear 704 rotates along the first direction and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate along the second direction until reaching the fourth position (as shown in fig. 2), the first sector gear 8 is positioned at the fourth position, the meshing is finished, the lock catch 3 is positioned at the second position, the opening and closing component is opened, the opening and closing component is actively controlled by the driving motor 5, the opening and closing of the circuit breaker can be intelligently controlled, and labor is saved, wherein after the second sector gear 704 rotates along the second direction and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate along the first direction until reaching the third position, if the second sector gear 704 continues to rotate, the first sector gear 8 is not meshed with the second sector gear 704, the first sector gear 8 rotates along the first direction or the second sector gear 8 is not influenced by the speed reducing component, the second sector gear 7, the opening and closing component is not influenced by the speed of the second sector gear 8, the lock catch 3, the space is also can be controlled by the speed reducing component, the speed of the lock catch 3, the speed is controlled, the space is also, the space is can be controlled, and the space is can is simply, and the space is easily controlled, and the space is can is easily and has the space, and has the advantages.

In a specific implementation, when the second sector gear 704 rotates along the second direction and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate along the first direction until reaching the third position, if the lock catch 3 is to be tripped, the toggle gear 702 is continuously driven to rotate, and the trip lever 4 is driven to be matched with the instantaneous protection component 2 to trip, so that the opening and closing component is opened, the structure is simple, and the control precision is higher.

Preferably, as shown in fig. 1 and 2, the instantaneous protection assembly 2 and the first sector gear are staggered in the width direction of the strip-shaped housing 1, and the first sector gear 8 is disposed below the instantaneous protection assembly 2, by which arrangement the rationality of the spatial arrangement is improved, while the long-distance control of the shackle 3 is possible.

Based on the above embodiments, in one specific embodiment, the handle operating assembly includes a handle 16 and a first connector 14; the second transmission assembly comprises a rotating piece 19, the rotating piece 19 is rotationally connected with the strip-shaped shell 1, and the rotating piece 19 is connected with the lock catch 3; one end of the first connecting piece 14 is connected with the handle 16, the other end is connected with the rotating piece 19 in a rotating way away from the axis, and the handle 16 can drive the rotating piece 19 to rotate so as to drive the lock catch 3 to lock or unlock.

The rotating member 19 is rotatably connected to an end of the lock catch 3 remote from the driving lever.

In this embodiment, the first connecting piece 14 can be pulled or pushed to move away from or close to the first sector gear 8 by the switching action of the handle 16, so that the first connecting piece 14 pulls or pushes the rotating piece 19, and a lateral force is applied to the rotating piece 19, so that the rotating piece 19 rotates along the axis, and the rotating piece 19 rotates along the first direction to drive the lock catch 3 to lock or rotates along the second direction to drive the lock catch 3 to release and unlock.

On the basis of the above embodiment, in a specific embodiment, the rotating member 19 is coaxially connected with the first sector gear 8, and the rotating member 19 is connected with the lock catch 3 through the second connecting member 15; one end of the second connecting piece 15 is rotationally connected with the rotating piece 19 at a position far away from the axis, and the other end of the second connecting piece is rotationally connected with one end of the lock catch 3 far away from the driving rod so as to drive the lock catch 3 to lock or unlock.

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

In this embodiment, the rotating member 19 rotates coaxially with the first sector gear 8, and when rotating in the first direction, the second connecting member 15 is driven to move in a direction approaching to the lock catch 3, so that the second connecting member 15 pushes the lock catch 3 to rotate in the second direction to achieve a locking state, and the opening and closing assembly is closed, and at this time, the lock catch 3 is located at the first position and is abutted against the driving member; the first sector gear 8 rotates along the second direction to drive the second connecting piece 15 to move towards the direction away from the lock catch 3, then the second connecting piece 15 can pull the lock catch 3 to rotate along the first direction to achieve an unlocking state, the lock catch 3 is located at the second position, the rotating piece 19 and the first sector gear 8 are coaxially arranged to play a transitional role, the handle operating assembly is connected, the driving motor 5 drives the reduction gear assembly 7 to drive the first sector gear 8 to rotate to achieve electric closing, manual opening operation or closing operation can be achieved through the cooperation of the handle 16 and the rotating piece 19, the manual opening operation or closing operation is achieved through the coaxial rotation of the rotating piece 19 and the first sector gear 8, the transitional connection is achieved, the rationality of arrangement of all parts in a long and narrow space of the circuit breaker is improved, and meanwhile, the lock catch 3 can be controlled in a long distance.

Further, handle operation subassembly, electric drive structure, first drive assembly, driving lever 4, instantaneous protection subassembly 2 and divide-shut brake subassembly distribute in proper order along length direction, through arranging electric drive structure, first drive assembly, driving lever 4, instantaneous protection subassembly 2 and hasp 3 in proper order along circuit breaker length direction for each spare part can be rationally arranged in strip casing 1, guarantees the performance of each spare part simultaneously.

Based on the above embodiment, in a specific embodiment, the toggle block 703 is circumferentially spaced from the center line of the second sector gear 704 by a preset angle.

In this embodiment, by arranging the toggle blocks 703 and the center lines of the second sector gears 704 at preset angles in the circumferential direction at intervals, the situation that the toggle blocks 703 and the pushing deflector rod 4 rotate while the first sector gears 8 are meshed with the second sector gears, so that the lock catch 3 is locked in rotation in the second direction and cannot be closed due to being pushed by the driving rod can be avoided.

Preferably, the gear part of the second sector gear 704 is arranged before the toggle block 703 in the second direction, and after the second sector gear 704 drives the first sector gear 8 to close the circuit breaker, the trip unlocking is performed through the toggle block 703.

On the basis of the above embodiment, in a specific embodiment, the device further includes a first micro switch 10 and a second micro switch 11 sequentially disposed along the second direction, where 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 shell 1 along the periphery of the first sector gear 8 at preset angles; the tooth surface of the first sector gear 8 is provided with a first bulge 17 and a second bulge 18 corresponding to the first micro switch 10 and the second micro switch 11 respectively.

In this embodiment, the first boss 17 and the second boss 18 are driven to rotate when the first sector gear 8 rotates, when the first boss 17 contacts with the first micro switch 10, the first sector gear 8 is detected to be in the fourth position, the lock catch 3 is in the second position, the circuit breaker is in the opening state, when the second boss 18 contacts with the second micro switch 11, the first sector gear 8 is detected to be in the third position, the lock catch 3 is in the first position, the circuit breaker is in the closing state, and the state of the circuit breaker is convenient to detect.

Based on the above embodiment, in a specific embodiment, the device further includes a third micro switch 12 and a fourth micro switch 13 sequentially disposed at intervals by a preset angle along the second direction, where the third micro switch 12 is used to detect whether the second sector gear 704 rotates along the second direction and is in a separated position with the first sector gear 8, and the fourth micro switch 13 is used to detect whether the toggle block 703 drives the toggle lever 4 to rotate to a position just where the lock catch 3 is unlocked; the third micro switch 12 and the fourth micro switch 13 are respectively arranged at one side of the strip-shaped shell 1, which is provided with a poking block 703 corresponding to the poking gear 702.

In this embodiment, the toggle gear 702 rotates along the second direction to drive the second sector gear 704 to mesh with the first sector gear 8, when the second sector gear 704 continues to rotate and is meshed with the first sector gear 8 and separated from the first sector gear 8, the toggle block 703 reaches the position of the third micro switch 12, the third micro switch 12 detects the toggle block 703, then the current state is detected to be the abdicating position, at this time, the second sector gear 704 is not on the moving path of the first sector gear 8, the first sector gear 8 does not rotate and cannot mesh with the second sector gear 704, the toggle gear 702 continues to rotate along the second direction, and when the toggle block 703 reaches the position of the fourth micro switch 13, the fourth micro switch 13 detects the toggle block 703, at this time, the position where the toggle block 703 drives the toggle lever 4 to rotate just so as to release and unlock the lock catch 3 is detected.

On the basis of the above embodiment, in a specific embodiment, a limiting member 9 is provided in the strip-shaped housing 1 on the side of the shift lever 4 away from the lock catch 3.

In this embodiment, the limiting member 9 limits the rotation of the driving lever 4 along the second direction, so as to avoid the excessive rotation position of the driving lever 4 along the second direction, which results in that the first transmission assembly cannot contact and transmit with the driving lever 4.

In this embodiment, the specific working principle of the tripping mechanism of the circuit breaker is as follows: the driving motor 5 drives the worm 6, the worm 6 drives the gear set 701 to rotate, the gear set 701 drives the toggle gear 702 to rotate along the second direction, the coaxial second sector gear 704 is driven to rotate along the second direction, if the first micro switch 10 detects that the first sector gear 8 is at the fourth position, the lock catch 3 is in the release state, namely at the second position, the second sector gear 704 continues to rotate and is meshed with the first sector gear 8 to drive the first sector gear 8 to rotate, because the first sector gear 8 is coaxially arranged with the rotating piece 19, the first sector gear 8 drives the lock catch 3 to rotate through the second connecting piece 15 until the second micro switch 11 detects that the first sector gear 8 is at the third position, the lock catch 3 is at the first position, the circuit breaker is in the switch-on state, the toggle gear 702 continues to rotate along the second direction, the second sector gear 704 is separated from the first sector gear 8, when the third micro switch 12 detects the toggle block 703, the toggle block 703 is at a 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 without being influenced by the second sector gear 704, the handle can drive the rotating piece 19 to rotate manually to drive the second connecting piece 15 to drive the lock catch 3 to control the opening and closing assembly to close or open the brake, then the toggle gear 702 is continuously rotated along the second direction, so that the toggle block 703 is abutted with one end of the toggle lever 4 close to the first transmission assembly and drives the toggle lever 4 to rotate along the first direction, the other end of the toggle lever 4 pushes the movable iron core 201 to slide towards one side of the lock catch 3 in the mounting seat 203, the drive lever pushes the lock catch 3 to release and unlock, or the other end of the toggle lever 4 directly pushes the drive lever to push the lock catch 3 to release and unlock, when the toggle gear 702 rotates to the fourth micro switch 13 to detect the toggle block 703, at this time, the toggle block 703 is detected to drive the toggle rod 4 to rotate so as to just enable the lock catch 3 to release and unlock, and the lock catch 3 is released, at this time, if the toggle gear 702 continues to rotate along the second direction and separate from the toggle rod 4 or drive the toggle block 703 to rotate along the first direction, then the toggle rod 4 is reversely unstressed, the limit flange 205 is pushed under the action of the reset spring 202 so as to push the movable iron core 201 to slide towards one side of the toggle rod 4, thereby pushing the toggle rod 4 to rotate along the second direction until contacting with the limit piece 9, both the movable iron core 201 and the toggle rod 4 are restored to the initial state, meanwhile, the rotating piece 19 and the first sector gear 8 are coaxially arranged to perform synchronous rotation, thereby playing a role of intermediate transmission transition, saving space and improving rationality of space arrangement. The technical problems that in the strip-shaped circuit breaker, because the inner space of the circuit breaker is long and narrow, each structural member is distributed along the length direction of the circuit breaker, the arrangement distance is far, the lock catch is difficult to control or the control precision is low in a long distance, and the lock catch cannot be controlled to be released and opened in time when the fault occurs are solved.

Example 3

The circuit breaker provided by the embodiment comprises the tripping mechanism of the circuit breaker.

In this embodiment, the tripping mechanism of the circuit breaker enables the circuit breaker to reasonably arrange each structural member in the circuit breaker, the long-distance control lock catch 3 is tripped, the control precision and the arrangement rationality are improved, and the lock catch 3 can be timely controlled to trip and open when faults occur.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. The tripping mechanism of the circuit breaker comprises a strip-shaped shell (1) and is characterized by comprising a handle operation assembly, an electric driving structure, a first transmission assembly, a deflector rod (4), an instantaneous protection assembly (2), a switching-on/off assembly and an overload protection assembly (20) which are arranged in the strip-shaped shell (1);

The opening and closing assembly is provided with a closing state and a separating and closing state, the lock catch (3) of the opening and closing assembly is in a locking state in the closing state, and the lock catch (3) of the opening and closing assembly is in an unlocking state in the separating and closing state; an arc extinguishing chamber (21) is arranged on one side of the opening and closing component and is used for extinguishing arc when the circuit breaker breaks a circuit;

the overload protection assembly (20) is connected with the opening and closing assembly and is used for driving the opening and closing assembly to open when the circuit breaker is overloaded;

the handle operation assembly is connected with the opening and closing assembly through a second transmission assembly and is used for realizing manual opening or closing operation;

the electric driving structure is connected with the opening and closing assembly through the first transmission assembly, and the first transmission assembly is driven by the electric driving structure along a first direction to drive the opening and closing assembly to be closed so as to realize electric closing operation;

the deflector rod (4) is rotatably connected with the strip-shaped shell (1), the deflector rod (4) is positioned in a transmission track of the first transmission assembly, and the deflector rod (4) is triggered to rotate when the first transmission assembly is transmitted along the second direction;

the instantaneous protection assembly (2) is provided with a driving rod positioned between the deflector rod (4) and the lock catch (3), and the lock catch (3) is pushed to unlock under the rotation of the deflector rod (4) so as to realize the electric brake separating operation.

2. The trip mechanism of a circuit breaker according to claim 1, characterized in that said instantaneous protection assembly (2) comprises a moving iron core (201), a return spring (202) and a mounting seat (203); the mounting seat (203) is fixedly connected with the strip-shaped shell (1); the movable iron core (201) is arranged in the mounting seat (203) in a sliding manner, one end of the movable iron core (201) extends out of one end of the mounting seat (203) and is abutted against one end, far away from the first transmission assembly, of the deflector rod (4), the other end of the movable iron core is integrally connected with the driving rod, and the driving rod extends out of the other end of the mounting seat (203) to push the lock catch (3) to unlock; a limit flange (205) is arranged on the periphery of the movable iron core (201), the reset spring (202) is sleeved on the movable iron core (201), one end of the reset spring (202) is abutted with one end of the mounting seat (203) close to the lock catch (3), and the other end is abutted with the limit flange (205); the outer side of the mounting seat (203) is sleeved with a coil group (206) corresponding to the movable iron core (201).

3. The trip mechanism of a circuit breaker according to claim 1, characterized in that said instantaneous protection assembly (2) comprises a moving iron core (201), a return spring (202) and a mounting seat (203); the mounting seat (203) is fixedly connected with the strip-shaped shell (1); the movable iron core (201) is arranged in the mounting seat (203) in a sliding manner, and one end, close to the lock catch, of the movable iron core (201) extends out of the mounting seat (203) to push the lock catch (3) to be unlocked; a limit flange (205) is arranged on the periphery of the movable iron core (201), the reset spring (202) is sleeved on the movable iron core (201), one end of the reset spring (202) is abutted with one end of the mounting seat (203) close to the lock catch (3), and the other end is abutted with the limit flange (205); a coil group (206) is sleeved on the outer side of the mounting seat (203) corresponding to the movable iron core (201);

The driving rod is arranged in the movable iron core in a penetrating way and is in sliding connection with the movable iron core; one end of the driving rod extends out of one end of the mounting seat (203) and is abutted with one end of the deflector rod (4) away from the first transmission assembly, and the other end of the driving rod extends out of the other end of the mounting seat (203) to push the lock catch (3) to unlock.

4. A trip mechanism of a circuit breaker according to any one of claims 1-3, characterized in that said first transmission assembly comprises a reduction gear assembly (7) and a first sector gear (8) distributed along the length of the strip-shaped casing (1); the electric driving structure is in driving connection with the speed reduction gear assembly (7), the speed reduction gear assembly (7) is in meshed connection with the first sector gear (8), the deflector rod (4) is positioned in a transmission track of the speed reduction gear assembly (7), and the speed reduction gear assembly (7) triggers the deflector rod (4) to rotate when driven along a second direction; the first sector gear (8) is connected with the lock catch, and the first sector gear (8) drives the lock catch (3) to lock along the transmission of a first direction, so that the electric closing operation is realized.

5. Trip mechanism of a circuit breaker according to claim 4, characterized in that said electric drive structure comprises a drive motor (5);

The speed reduction gear assembly (7) comprises a gear set (701) and a toggle gear (702) which are distributed along the length direction of the strip-shaped shell (1);

the driving motor (5) is meshed with the gear set (701) through a worm (6), and the gear set (701) is meshed with the toggle gear (702);

one end of the poking gear (702) is provided with a poking block (703) in an outward protruding mode, and the poking block (703) rotates along with the poking gear (702) and can be abutted with one end of the poking rod (4) to drive the poking rod (4) to rotate;

the one end that stir gear (702) kept away from stir piece (703) is provided with second sector gear (704) coaxial, first sector gear (8) with second sector gear (704) meshing.

6. The trip mechanism of a circuit breaker of claim 5 wherein said handle operating assembly includes a handle (16) and a first link (14);

the second transmission assembly comprises a rotating piece (19), the rotating piece (19) is rotationally connected with the strip-shaped shell (1), and the rotating piece (19) is connected with the lock catch (3);

one end of the first connecting piece (14) is connected with the handle (16), the other end of the first connecting piece is in rotary connection with the rotating piece (19) away from the axis, and the handle (16) can drive the rotating piece (19) to rotate so as to drive the lock catch (3) to lock or unlock.

7. Trip mechanism of a circuit breaker according to claim 6, characterized in that said rotating member (19) is coaxially connected to said first sector gear (8), said rotating member (19) being connected to said shackle (3) by means of a second connecting member (15);

one end of the second connecting piece (15) is rotationally connected with the rotating piece (19) far away from the axis, and the other end of the second connecting piece is rotationally connected with one end of the lock catch (3) far away from the driving rod, so that the lock catch (3) is driven to be locked or unlocked.

8. The trip mechanism of a circuit breaker according to claim 5, characterized in that said toggle block (703) is circumferentially spaced from the center line of said second sector gear (704) by a preset angle.

9. Trip mechanism of a circuit breaker according to any one of claims 1-3, 5-8, characterized in that a limiting piece (9) for limiting the deflector rod (4) is arranged in the strip-shaped casing (1) at one side of the deflector rod (4) far from the lock catch (3).

10. A circuit breaker comprising a trip mechanism of the circuit breaker of any one of claims 1-9.

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