CN219106038U - Operating mechanism and circuit breaker - Google Patents

Abstract

The utility model provides an operating device and circuit breaker, operating device includes link assembly and hasp subassembly, link assembly and hasp subassembly sliding fit, link assembly linkage is connected between moving contact and handle mechanism, the hasp subassembly includes unblock piece, locking piece and hasp return piece, unblock piece rotates the assembly and with locking piece snap-fit, link assembly is including being used for driving the link assembly and removes the return piece that breaks the floodgate position from the combined floodgate position, and the hasp return piece is used for making unblock piece and the locking piece that releases snap-fit resume the hasp. The hasp assembly of the operating mechanism provided by the utility model is capable of recovering the hasp structure after being unlocked, the hasp structure is recovered without manual operation, and parts are fewer, so that the hasp assembly has the advantages of compact structure, stable cooperation and convenience in operation.

Description

Operating mechanism and circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to an operating mechanism and a circuit breaker.

Background

A circuit breaker is a switching device for switching off and on a load circuit, and switching off a fault circuit to prevent an accident from being enlarged, thereby securing a safe operation of the load circuit. In the existing partial products, the operating mechanism comprises a plurality of parts such as a jump button, a lock catch, a lever, a contact support and the like, after faults such as short circuit or overload occur, the lock catch is triggered to rotate, so that the jump button and the lock catch are tripped to separate a circuit breaker, but the existing operating mechanism with a connecting rod assembly and the lock catch assembly in sliding fit needs to be manually operated to enable the existing operating mechanism to be in re-locking fit after the faults are removed, and the operating mechanism is more in parts, complex in matching and inconvenient to operate.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides an operating mechanism and a circuit breaker capable of automatically recovering a hasp after tripping.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an operating device, includes link assembly and hasp subassembly, link assembly and hasp subassembly sliding fit, link assembly linkage is connected between moving contact and handle mechanism, the hasp subassembly includes unlatching piece, locking piece and hasp return piece, unlatching piece rotates the assembly and with locking piece snap fit, link assembly is including the return piece that is used for driving link assembly to remove to the separating brake position from the combined floodgate position, and the hasp return piece is used for making unlatching piece and the locking piece that releases the snap fit resume the hasp.

Preferably, the device further comprises a first positioning plate and a second positioning plate which are oppositely arranged, and the connecting rod assembly and the hasp assembly are assembled between the first positioning plate and the second positioning plate.

Preferably, the first positioning plate is provided with a first positioning part, the lock catch resetting piece is connected between the unlocking piece and the first positioning part, the second positioning plate is provided with a second positioning part, and the resetting piece is connected between the second positioning part and the connecting rod assembly.

Preferably, one end of the locking piece is rotationally connected, the other end of the locking piece is in snap fit with one end of the unlocking piece, a sliding groove is formed in the middle of the locking piece, and the connecting rod assembly is in sliding fit with the sliding groove.

Preferably, the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially connected in a linkage mode, one end of the first connecting rod is connected with the handle mechanism, the connecting position of the first connecting rod and the second connecting rod is in sliding fit with the sliding groove, the reset piece is connected with one end of the third connecting rod, and the other end of the third connecting rod is used for being connected with the moving contact.

Preferably, the unlocking piece comprises an integrally formed rotating part, a second triggering part, a hasp part and a reset connecting part, wherein a shaft hole for rotating assembly is formed in the middle of the rotating part, the second triggering part and the hasp part are located on two opposite sides of the rotating part, the tail end of the second triggering part extends outwards along the direction away from the rotating part, the hasp part extends along the tangential line parallel to the shaft hole towards the direction away from the second triggering part, and the reset connecting part extends outwards in a protruding manner along the direction parallel to the central axis of the shaft hole.

Preferably, the sliding groove is bent at one end far away from the unlocking piece to form an arc-shaped avoiding groove.

Preferably, after the unlocking piece and the locking piece are in release of the snap fit, when the reset piece drives the connecting rod assembly to move from the closing position to the opening position, the connecting rod assembly drives the locking piece to reset, and the lock catch reset piece drives the unlocking piece to reset, so that the unlocking piece and the locking piece are restored to be buckled.

The utility model also provides a circuit breaker comprising a housing in which the operating mechanism as described above is fitted.

Further, a short-circuit protection mechanism and/or an overload protection mechanism are arranged in the shell, and the short-circuit protection mechanism, the overload protection mechanism and the unlocking piece are matched to trigger the unlocking piece to unlock and rotate; the two ends of the shell are provided with a pair of binding posts, the contact mechanism comprises a moving contact and a fixed contact which are respectively and electrically connected with the pair of binding posts, and the short-circuit protection mechanism and/or the overload protection mechanism are/is connected with the same binding post with the fixed contact.

The operating mechanism and the circuit breaker applying the operating mechanism have the advantages that the hasp assembly of the operating mechanism restores the hasp structure after being unlocked, the hasp structure is restored without manual operation, parts are fewer, and the operating mechanism has the advantages of compact structure, stable cooperation and convenience in operation.

In addition, the first positioning plate and the second positioning plate provide assembling positions for the hasp assembly and the connecting rod assembly to form a modularized operating mechanism, and the operating mechanism can be assembled into a whole and then assembled into the circuit breaker.

Drawings

Fig. 1 is a schematic view of a circuit breaker (without a second positioning plate) according to the present utility model;

FIG. 2 is an enlarged schematic view of the portion C in FIG. 1;

fig. 3 is a schematic structural view of the circuit breaker (a side provided with the second positioning plate) according to the present utility model;

fig. 4 is a schematic structural view of the circuit breaker (a side provided with the first positioning plate) according to the present utility model;

FIG. 5 is a schematic view of the handle mechanism, operating mechanism and moving contact according to the present utility model;

FIG. 6 is a schematic view of the reset member and latch of the present utility model;

fig. 7 is a schematic diagram of an arc extinguishing system of the present utility model inducing a magnetic field;

fig. 8 is a top view of the arc extinguishing system of the present utility model when the arc extinguishing system is opened;

fig. 9 is a top view of the arc extinguishing system of the present utility model during closing;

fig. 10 is an exploded schematic view of the arc extinguishing system of the present utility model (without the arc chute);

FIG. 11 is a schematic view of the structure of the unlocking member in the present utility model;

FIG. 12 is a schematic diagram of the engagement of the short circuit protection mechanism and the unlocking member of the present utility model;

fig. 13 is a schematic structural view of the first yoke in the present utility model.

Detailed Description

Embodiments of the operating mechanism and circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The operating mechanism and the circuit breaker of the present utility model are not limited to the description of the following embodiments.

As shown in fig. 1, 3 and 4, the circuit breaker comprises a shell, two ends of the shell are provided with a pair of wiring terminals, a handle mechanism 2, an operating mechanism, a contact mechanism and an arc extinguishing system are arranged between the pair of wiring terminals, wherein the handle mechanism 2 is rotatably assembled on the shell, the contact mechanism comprises a moving contact 61 and a fixed contact 62 which are mutually matched, the moving contact 61 and the fixed contact 62 are respectively and electrically connected with the pair of wiring terminals, the fixed contact 62 is fixedly assembled in the shell, the handle mechanism 2, the operating mechanism and the moving contact 61 are sequentially connected in a linkage manner, and the moving contact 61 can be driven to rotate towards a direction approaching to or away from the fixed contact 62 through operating the handle mechanism 2, so that the switching-on and switching-off of the circuit breaker are realized; the arc extinguishing system is matched with the contact mechanism and is used for extinguishing an electric arc generated when the contact mechanism breaks. In addition, a protection mechanism can be arranged in the shell, the protection mechanism is matched with the operation mechanism, when the circuit breaker has short circuit or overload fault, the protection mechanism triggers the operation mechanism to trip, so that the operation mechanism drives the movable contact 61 to be far away from the fixed contact 62, and the protection mechanism comprises a short circuit protection mechanism and/or overload protection mechanism 9 and is used for triggering the operation mechanism to trip when the short circuit or overload fault occurs.

The operating mechanism comprises a connecting rod assembly and a hasp assembly, wherein the connecting rod assembly is in sliding fit with the hasp assembly, the handle mechanism 2 is connected with the moving contact 61 in a linkage manner through the connecting rod assembly, the connecting rod assembly is in sliding fit with the hasp assembly to drive the moving contact 61 to be close to or far away from the fixed contact 62 through the operating handle mechanism 2, the protection mechanism is arranged on one side of the hasp assembly, when a fault occurs, the protection mechanism triggers the hasp assembly to unbuckle, and the connecting rod assembly is in sliding fit with the hasp assembly to drive the handle mechanism 2 and the moving contact 61 to rotate towards the opening direction.

The improvement point of the application lies in that the link assembly includes the return piece 34, and the return piece 34 is used for driving the link assembly to remove to separating brake position from the combined floodgate position, and the hasp assembly includes unblock piece 41, hasp piece 42 and hasp return piece 43, and wherein unblock piece 41 and the one end snap-fit of hasp piece 42, hasp return piece 43 are used for making unblock piece 41 and the locking piece 42 that release the snap-fit resume the hasp. After the unlocking piece 41 and the locking piece 42 are released from the snap fit, the reset piece 34 drives the connecting rod assembly to move in a sliding fit manner with the snap fit assembly, and when the connecting rod assembly moves from the closing position to the opening position, the lock catch reset piece 43 drives the unlocking piece 41 to reset, so that the unlocking piece 41 and the locking piece 42 recover the snap fit. The hasp assembly of the operating mechanism restores the hasp structure after unlocking, manual operation is not needed to enable the hasp assembly to restore the hasp structure, parts are fewer, and the device has the advantages of compact structure, stable cooperation and convenience in operation.

Further, a positioning plate for assembling the operating mechanism is arranged in the housing, the positioning plate comprises a first positioning plate 13 and a second positioning plate 14 which are oppositely arranged, the connecting rod assembly and the hasp assembly are assembled between the first positioning plate 13 and the second positioning plate 14, the positioning plate provides assembling positions for the resetting piece 34 and the hasp resetting piece 43, so that the operating mechanism forms a modularized structure, specifically, the first positioning plate 13 is provided with a first positioning part 131, the hasp resetting piece 43 is connected between the unlocking piece 42 and the first positioning part 131, the second positioning plate 14 is provided with a second positioning part 141, the resetting piece 34 is connected between the connecting rod assembly and the second positioning part 141, and of course, the resetting piece 34 can be connected between the unlocking piece 42 and the housing, and the hasp resetting piece 43 can also be connected between the connecting rod assembly and the housing, which is only unfavorable for forming the modularized structure. The handle mechanism 2 and the movable contact 61 may be rotatably supported between the first positioning plate 13 and the second positioning plate 14.

Further, the operating mechanism further comprises an indicating piece 5 for indicating the opening and closing state, the indicating piece 5 is driven to rotate by the connecting rod assembly to switch the indicating state, and the indicating piece 5 is matched with the indicating window arranged on the shell, so that the state of the operating mechanism is acquired from the indicating window.

The circuit breaker includes a housing, preferably including a base 11 and an upper cover 12 that are mutually covered, a pair of terminals are provided at two ends of the housing, an operating mechanism, a handle mechanism 2, an arc extinguishing system, a short-circuit protection mechanism and an overload protection mechanism 9 are provided in the housing between the pair of terminals, the handle mechanism 2 is rotatably assembled at the upper portion of the housing, a handle hole for the handle mechanism 2 to extend out is provided at the upper side wall of the housing, the operating mechanism is connected with the handle mechanism 2 in a linkage manner and is located at the middle of the housing, the arc extinguishing system is correspondingly arranged at the lower portion of the housing and is located below the handle mechanism 2, the short-circuit protection mechanism is located between the operating mechanism and the arc extinguishing system, a protection mechanism is provided in a gap between one of the terminals and the operating mechanism, the short-circuit protection mechanism and the overload protection mechanism 9 are respectively matched with the operating mechanism, and the short-circuit protection mechanism and the overload protection mechanism 9 are close to and connected with the same terminal.

As shown in fig. 1, 2 and 5, the operating mechanism includes a pair of oppositely disposed positioning plates, namely a first positioning plate 13 and a second positioning plate 14, the first positioning plate 13 and the second positioning plate 14 are disposed in parallel between the base 11 and the upper cover 12, a connecting rod assembly and a hasp assembly are assembled between the first positioning plate 13 and the second positioning plate 14, the handle mechanism 2 can be rotatably supported between the first positioning plate 13 and the second positioning plate 14, the handle mechanism 2 is in linkage connection with the moving contact 61 through the connecting rod assembly, the hasp assembly is located at one side of the handle mechanism 2 and can drive the handle mechanism 2 to rotate in the opening direction, the short-circuit protection mechanism and the overload protection mechanism 9 are located at positions close to the hasp assembly in the shell, and the connecting rod assembly and the hasp assembly are in sliding fit through driving the hasp assembly to move from the closing position to the opening position and drive the moving contact 61 and the handle mechanism 2 to rotate in the opening direction.

As shown in fig. 5, 6 and 11, the link assembly is located on the side of the hasp assembly facing away from the short-circuit protection mechanism, that is, the link assembly is located between the upper side wall of the shell and the hasp assembly, the link assembly comprises a first link 31, a second link 32, a third link 33 and a reset piece 34, wherein one end of the first link 31 is linked with the handle mechanism 2, one end of the second link 32 connected with the first link 31 reciprocates along a connecting line connected between the handle mechanism 2 and the moving contact 61, preferably, the moving track of the reciprocation is approximately parallel to the side wall of the shell provided with the handle hole, the other end of the second link 32 is linked with one end of the third link 33, the other end of the third link 33 is linked with the moving contact 61, the reset piece 34 is used for providing a reset force for the third link 33 to enable the link assembly to move in sliding fit with the hasp assembly from the closing position to the opening position, preferably, the reset piece 34 is a spring, one end of the spring is connected with the positioning plate, and the other end of the spring is connected with the third link 33.

The hasp assembly comprises an unlocking member 41, a locking member 42 and a hasp resetting member 43, wherein the unlocking member 41 is rotatably assembled between the first positioning plate 13 and the second positioning plate 14, the locking member 42 is assembled between the first positioning plate 13 and the second positioning plate 14, the unlocking member 41 is positioned between the locking member 42 and the handle mechanism 2, in fig. 1-5, the locking member 42 is positioned in a shell between the handle mechanism 2 and the moving contact 61 and is parallel to a shell side wall provided with a handle hole, in the embodiment, the locking member 42 is parallel to an upper side wall (see fig. 1-4) of the shell, a sliding groove 421 is arranged in the middle of the locking member 42, the sliding groove 421 is basically parallel to the shell side wall provided with the handle hole, an arc-shaped avoidance groove 421a is formed by bending downwards at one end of the sliding groove 421 away from the handle mechanism 2 in a direction close to the moving contact 61, a joint of the first connecting rod 31 and the second connecting rod 32 slides through the sliding groove 421, a short shaft connected between the first connecting rod 31 and the second connecting rod 32 slides through the sliding groove 421 is generally matched with the short shaft 421, a sliding track of one end of the sliding groove 421 is limited by the sliding groove 421, when the sliding track of one end of the second connecting rod 32 is positioned at the first connecting rod 31 and the arc-shaped connection groove 421 is positioned at the position of the arc-shaped connection groove 421 is far away from the first connecting rod 32, and the arc-shaped connection groove 421 is positioned at the first connecting rod 32 is far away from the arc-shaped connection groove 421 is; one end of the locking member 42 is rotatably connected with the positioning plate, the other end of the locking member 42 is in snap fit with one end of the unlocking member 41, which is close to the locking member 42, in this embodiment, the short-circuit protection mechanism and the overload protection mechanism 9 are respectively matched with the unlocking member 41, when a short circuit or overload fault occurs, the unlocking member 41 rotates, the reset member 34 drives the connecting rod assembly to be in sliding fit with the snap-fit assembly, and the connecting rod assembly is moved to the opening position from the closing position, that is, the locking member 42 rotates by a certain angle, the connection part of the first connecting rod 31 and the second connecting rod 32 is moved out of the arc-shaped avoiding groove 421a, the connection part of the first connecting rod 31 and the second connecting rod 32 can drive the locking member 42 to rotate, so that the locking member 42 rotates back to the original position, or the connecting rod assembly drives the unlocking member 41 to rotate back to the original position, so that the unlocking member 41 and the locking member 42 are restored to be in snap fit, and the connecting rod assembly is driven by the reset member 34 to slide leftwards along the sliding chute 421, and the connecting rod assembly drives the contact handle 2 and the moving handle 61 to the opening direction to the opening position until the connecting rod assembly moves leftmost end of the sliding chute 421 to the sliding along the sliding chute 421, and the sliding chute 421 is preferably in the position, and the position of the unlocking member is in the reset member 43 is provided for the reset force, and the unlocking member is preferably connected between the unlocking member 43 and the unlocking member 43.

The operating mechanism further comprises an energy storage connecting rod 35, the energy storage connecting rod 35 is positioned on one side of the first positioning plate 13 opposite to the second positioning plate 14, the energy storage connecting rod 35 and the connecting rod assembly are separated by the first positioning plate 13, one end of the energy storage connecting rod 35 is connected with the handle mechanism 2 in a linkage manner, the other end of the energy storage connecting rod 35 extends to one side of the moving contact 61, the moving contact 61 is provided with a limiting part 611 which can be abutted with the energy storage connecting rod 35, and in the closing process, the energy storage connecting rod 35 and the limiting part 611 are matched to realize quick closing; in this embodiment, a first track groove 151 is provided at a position of the first positioning plate 13 corresponding to the handle mechanism 2, the first track groove 151 is an arc groove in fig. 4, a first end of the energy storage link 35 slides through the first track groove 151 and is connected with the handle mechanism 2, so that the first end of the energy storage link 35 slides along the first track groove 151 along with rotation of the handle mechanism 2, a return spring is connected between the first end of the energy storage link 35 and the handle mechanism, a second end of the energy storage link 35 moves between the moving contact 61 and the fixed contact 62, and a movement track of the second end of the energy storage link 35 intersects with a movement track of the limiting portion 611 at a point. In this embodiment, the limiting portion 611 is located on a boss structure on a side of the moving contact 61 facing the fixed contact 62.

Of course, the track groove may further include a second track groove, where the middle portion of the second track groove intersects with the moving track of the limiting portion 611 only at a point, the second end of the energy storage link 35 moves along the second track groove to be matched with the limiting portion 611, and the second track groove may be disposed on the first positioning plate 13 or may be disposed on the second positioning plate 14, which only needs to ensure that the second track groove corresponds to between the moving contact 61 and the fixed contact 62, and only has one intersection point with the moving track of the limiting portion 611 in the extending direction of the second track groove, so that the second end of the energy storage link 35 moves along the second track groove.

In addition, when the positioning plate is not used to separate the link assembly and the energy storage link 35, that is, when the energy storage link 35 and the link assembly are assembled together with the first positioning plate 13 and the second positioning plate 14, if the energy storage link 35 can be ensured to move on a determined track, the track groove may be omitted.

As shown in fig. 5, the operating mechanism further includes an indicator 5, where the indicator 5 is rotatably assembled on a side of the first positioning plate 13 opposite to the second positioning plate 14, an indication window is disposed on a side wall of the housing provided with a handle hole, one end of the indicator 5 is corresponding to the indication window as an indication portion, a driven portion is protruded on a side of the indicator 5 facing the link assembly, and a groove is formed on the first positioning plate 13 corresponding to the driven portion, so that the driven portion can be driven by the link assembly, in this embodiment, a hollow area is formed on a side of the second positioning plate 14, and the driven portion is matched with the second link 32, that is, a driving portion is disposed on a side of the second link 32, and preferably the driving portion includes a closing driving portion and an opening driving portion, and the opening driving portion is respectively matched with the driving portion to push the indicator 5 to swing to switch states, so as to indicate the opening and closing states of the circuit breaker.

As shown in fig. 1-5, the contact mechanism comprises a fixed contact 62 and a movable contact 61 which are oppositely arranged, the fixed contact 62 comprises a conductive plate 621, the conductive plate 621 is arranged along the middle part of the shell, one end of the conductive plate 621 is connected with one wiring terminal, the middle part of the conductive plate 621 is parallel to the side wall of the shell provided with a handle hole, in fig. 1-4, the middle part of the conductive plate 621 is positioned below the locking piece 42, the other end of the conductive plate 621 is bent and provided with a contact on the surface of the conductive plate 621, and the contact is opposite to the movable contact 61 and is used for being matched with the contact of the movable contact 61; the movable contact 61 is provided with an energy storage element 612, the energy storage element 612 provides closing driving for the movable contact 61, and the energy storage element 612 is preferably arranged between the movable contact 61 and the third connecting rod 33; the moving contact 61 includes a moving contact body, a contact for matching with the fixed contact 62 is disposed on one side of the end of the moving contact body, a limiting portion 611 is protruding on one side of the moving contact body facing the fixed contact 62, the limiting portion 611 is matched with the second end of the energy storage connecting rod 35, the limiting portion 611 and the contact of the moving contact 61 are located on the same side of the moving contact body, of course, the limiting portion 611 may be disposed at other positions of the moving contact body, for example, the side wall of the moving contact body adjacent to the contact position, in addition, the limiting portion 611 may be a groove structure, but it is required to ensure that the second end of the energy storage connecting rod 35 can smoothly extend into or move out of the groove.

During closing, the handle mechanism 2 drives the connecting rod assembly to rotate towards the closing direction, the connecting part of the first connecting rod 31 and the second connecting rod 32 moves to and fro along the sliding groove 421, that is, the left end of the sliding groove 421 moves to the right end of the sliding groove 421 in fig. 1, 2 and 5, the third connecting rod 33 drives the moving contact 61 to rotate towards the direction close to the fixed contact 62, the second end of the energy storage connecting rod 35 moves downwards to be between the moving contact 61 and the fixed contact 62, the second end of the energy storage connecting rod 35 is abutted with the limiting part 611, the moving contact 61 stops rotating, the connecting rod assembly is driven to store energy along with the continuous rotation of the handle mechanism 2 in the closing direction, meanwhile, the continuous rotation of the handle mechanism 2 enables the second end of the energy storage connecting rod 35 to continuously move downwards so as to release limiting cooperation with the limiting part 611, after the second end of the second connecting rod 32 is separated from the limiting part 611, the energy storage member 612 releases energy to drive the moving contact 61 to continuously rotate, and the energy storage member 612 releases energy to accelerate the closing rotation of the moving contact 61, so that rapid closing is realized, and the closing is achieved, and the closing is carried out in place by referring to fig. 1, 2, 4 and 5, and the connecting rod 31 is kept in place in the arc-shaped state and 31. During the closing process, the closing driving part of the second connecting rod 32 pushes the indicator 5 to rotate towards the closing direction, so that the indicator 5 switches the indication state.

During opening, the handle mechanism 2 drives the connecting rod assembly to rotate towards the opening direction, the connection part of the first connecting rod 31 and the second connecting rod 32 moves back and forth along the sliding groove 421, namely, the right end of the sliding groove 421 moves to the left end of the sliding groove 421 in fig. 1, 2 and 5, the third connecting rod 33 drives the moving contact 61 to rotate towards the direction away from the fixed contact 62, the second end of the energy storage connecting rod 35 moves upwards, and when the energy storage connecting rod 35 and the limiting part 611 just start to contact, the moving track of the energy storage connecting rod 35 is finely adjusted by the reset spring, so that the energy storage connecting rod 35 and the limiting part 611 cannot abut against and limit, and the opening is in place, as shown in fig. 4. During the opening process, the opening driving part of the second connecting rod 32 pushes the indicator 5 to rotate towards the opening direction, so that the indicator 5 switches the indication state.

As shown in fig. 1, 3 and 4, in this embodiment, the short-circuit protection mechanism and the overload protection structure are respectively matched with the snap-fit assembly, in the figure, the short-circuit protection mechanism is located below the snap-fit assembly, the short-circuit protection mechanism comprises a second magnetic yoke 82 and an armature 81, the armature 81 is located between the second magnetic yoke 82 and the snap-fit assembly, the second magnetic yoke 82 is connected with the fixed contact 62, one end of the armature 81 is rotationally connected, the other end of the armature 81 can rotate towards the direction close to the second magnetic yoke 82 under the action of the second magnetic yoke 82, a deflector 811 for triggering the rotation of the unlocking member 41 is arranged on one side facing the snap-fit assembly, in this embodiment, the deflector 811 is arranged at an angle with the armature 81, so that one end of the deflector 811 is inclined towards the unlocking member 41, and the rotation of the unlocking member 41 is more favorably triggered to be unlocked when the short-circuit fault occurs; in fig. 3, the second magnetic yoke 82 is connected to the conductive plate 621 of the stationary contact 62, and the second magnetic yoke 82 and the armature 81 are respectively located at two sides of the conductive plate 621, it is also understood that the conductive plate 621 is connected to the second magnetic yoke 82 and passes through a gap between the second magnetic yoke 82 and the armature 81, so that the conductive plate 621 of the stationary contact 62 becomes a part of the short-circuit protection mechanism, to simplify the structure thereof, wherein the armature 81 rotates between the conductive plate 621 and the buckle assembly, the second magnetic yoke 82 is located at a side of the conductive plate 621 opposite to the buckle assembly, a deflector 811 is disposed at a side of the armature 81 opposite to the stationary contact 62, the deflector 811 can drive the unlocking member 41 to rotate, so that the unlocking member 41 is disengaged from the locking member 42, and the locking member 42 is in a rotatable state, so that the link assembly is driven to reset by the resetting member 34, that is moved toward the opening direction, so that the moving contact 61 and the handle mechanism 2 are driven by the link assembly to open.

In connection with fig. 3 and 12, a specific embodiment of a short-circuit protection mechanism is provided, the short-circuit protection mechanism includes an armature 81, a second magnetic yoke 82, a rotating connecting shaft and an armature reset member, wherein the armature 81 has a plate structure, two opposite side edges of the armature 81 are bent and extended to form side edges, an assembly hole is arranged at the same end of a pair of side edges, the rotating connecting shaft is assembled in the assembly hole, a transient spring is sleeved on the rotating connecting shaft, the armature 81 is rotationally assembled in a shell by the rotating connecting shaft, the armature 81 can be driven to reset by adjusting the force value of the spring to set the transient action value, a yielding groove 812 is formed on the plate surface of the armature 81, the yielding groove 812 is used for unlocking and rotating the yielding unlocking piece 41, the edge of the yielding groove 812, which is close to one side of the rotating connecting shaft, is inclined outwards along the direction deviating from the side edge to form a shifting rod 811, a gap is reserved between the shifting rod 811 and the yielding groove 812, so that the first unlocking part 411 of the unlocking piece 41 can correspondingly extend into the gap between the shifting rod 811 and the yielding groove 812, the armature resetting piece is sleeved on the rotating connecting shaft, preferably, the armature resetting piece is a torsion spring, one elastic arm of the armature resetting piece extends into the yielding groove 812 and is abutted with the edge of the yielding groove 812, and the other elastic arm of the armature resetting piece is abutted with the armature 81, so that the armature 81 can be extruded for energy storage during rotation; the second magnetic yoke 82 is integrally in a plate structure, and edges on two sides of the second magnetic yoke are bent in the same direction to form a folded edge, in this embodiment, the folded edge is located on one side facing the armature 81, the conductive plate 621 of the fixed contact 62 is attached to the plate surface of the second magnetic yoke 82, and the conductive plate 621 is located between a pair of folded edges, so that the structure is more compact.

One end of the overload protection mechanism 9 and the short-circuit protection mechanism are connected to the same wiring terminal, the other end of the overload protection mechanism 9 extends to one side of the hasp assembly, the overload protection mechanism 9 comprises a bimetallic strip, in fig. 1 and 3, the movable end of the bimetallic strip extends towards the direction of the handle mechanism 2, one end of the unlocking piece 41, which is close to the handle mechanism 2, corresponds to between the handle mechanism 2 and the movable end of the bimetallic strip, and the unlocking piece 41 is rotated to separate and unbuckle the locking piece 42 by driving the unlocking piece 41 to be close to one end of the handle mechanism 2.

In this embodiment, the unlocking member 41 is provided with a first triggering portion 411, a second triggering portion 412 and a buckle portion 413, the first triggering portion 411 and the second triggering portion 412 correspond to opposite sides of the unlocking member 41, in this embodiment, the first triggering portion 411 is located at one end far away from the handle mechanism 2, that is, the first triggering portion 411 is close to the short-circuit protection mechanism and is used for being matched with the short-circuit protection mechanism, in addition, the buckle portion 413 and the first triggering portion 411 are arranged at the same end of the unlocking member 41 side by side, so that the unlocking rotation distance of the unlocking member 41 is shortened, the occupied space is reduced, and the internal structure is more compact; the second trigger portion 412 is adjacent the handle mechanism 2 for engagement with the movable end of the bi-metallic strip.

Referring to fig. 1-6 and 11, to provide a specific structure of the unlocking member 41, as shown in fig. 11, the unlocking member 41 includes a rotation portion 410, a first trigger portion 411, a second trigger portion 412, a buckle portion 413 and a reset connection portion 414 that are integrally formed, the rotation portion 410 is cylindrical, a shaft hole for rotation assembly is provided in the middle of the rotation portion 410, the unlocking member 41 is rotatably assembled between the first positioning plate 13 and the second positioning plate 14 through the rotation portion 410, the second trigger portion 412 and the buckle portion 413 are located at opposite sides of the rotation portion 410, the first trigger portion 411 and the buckle portion 413 are arranged side by side, the first trigger portion 411 protrudes outwards to form a hook shape, a groove structure is provided at a side of the first trigger portion 411 facing the second trigger portion 412, a bottom surface of the groove structure is used as a mating surface 411a for mating with a driving lever 811, preferably, the mating surface 411a is an inclined surface, when the unlocking member 41 is mated with the driving lever 811, the first trigger portion is correspondingly located in a gap between the driving lever 811 and the yielding groove 812, the first trigger portion is prevented from interfering with the unlocking member 41 when the unlocking member 41 is driven; the end of the second triggering portion 412 extends outwards along the direction away from the rotating portion 410, the whole second triggering portion 412 is in a rod-shaped structure, the hasp portion 413 extends along the tangential line parallel to the shaft hole and towards the direction away from the second triggering portion 412, a hasp surface is formed on one side surface of the hasp portion 413 and is used for being in contact with the locking piece 42, the upper surface of the hasp portion 413 is used for being in contact with the locking piece 42 in the figure, the reset connecting portion 414 extends outwards in a protruding mode along the direction parallel to the central axis of the shaft hole, the reset connecting portion 414 is also cylindrical, one end of the latch reset piece 43 is connected with the reset connecting portion 414, and the other end of the latch reset piece 43 is connected with the first positioning portion 131 of the first positioning plate 13.

As shown in fig. 1, 3, 4 and 7-10, the arc extinguishing system is arranged in a matching way with the contact mechanism and is arranged below the shell, the arc extinguishing system comprises an arc extinguishing chamber 71, the arc extinguishing chamber 71 is arranged below the operating mechanism, particularly below the hasp assembly, in fig. 1 and 3, the short circuit protection mechanism and the static contact 62 are positioned between the arc extinguishing chamber 71 and the hasp assembly, the internal space of the shell is fully utilized, and is more compact in structure, the overload protection mechanism 9 is positioned on one side of the arc extinguishing chamber 71 opposite to the moving contact 61, a pair of arc isolation plates 72 are arranged on one side of the arc extinguishing chamber 71, the plate surfaces of the arc isolation plates 72 are parallel to the plate surfaces of the positioning plates, an arc striking cavity communicated with the arc extinguishing chamber 71 is formed between the arc isolation plates 72, the contact mechanism is correspondingly arranged in the arc striking cavity, the static contact 62 is fixed on one side of the arc striking cavity, which is close to the arc extinguishing chamber, particularly, one end of the conductive plate 621 is arranged on one side of the arc striking cavity, which is parallel to the direction of the arc extinguishing chamber 71, and is far away from the moving contact 61, the middle part of the conductive plate 621 is bent and around 73 on one side opposite to the moving contact 71, the side of the moving contact 71, the conductive plate 621 surrounds the moving contact 73, and the other end of the conductive plate 621 surrounds the surrounding the moving contact 73, and surrounds the three contacts and surrounds the moving contact 73, and is arranged on the side of the side, and is connected with the arc striking cavity 73, and extends along the arc striking cavity, along the side; the moving contact 61 may swing in the arc striking cavity to be close to or far away from the fixed contact 62, the iron core 73 is disposed on one side of the arc striking cavity close to the arc extinguishing chamber 71, the middle portion of the conductive plate 621 of the fixed contact 62 is attached to the outer side of the iron core 73 and is bent along the outer curved surface of the iron core 73, so that one end of the conductive plate 621 provided with a contact extends in the tangential direction of the iron core 73 in a direction away from the buckle assembly, and in fig. 1-4, the conductive plate 621 of the fixed contact 62 surrounds one side of the iron core 73 facing the buckle assembly and the moving contact 61.

A first arc striking plate 751 and a second arc striking plate 752 which are respectively matched with the contact mechanism are arranged in the arc striking cavity, wherein the first arc striking plate 751 is matched with the fixed contact 62, one end of the first arc striking plate 751 is connected with the fixed contact 62, namely one end of the first arc striking plate 751 is connected along the direction that one end of the conductive plate 621 is provided with a contact, the middle part of the first arc striking plate 751 is bent and folded back to form a U-shaped body so that the other end of the first arc striking plate 751 extends into the arc extinguishing chamber 71, and thus, the conductive plate 621 is matched with the first arc striking plate 751 to form an annular structure encircling the periphery of the iron core 73; the second striking plate 752 is spaced opposite to the first striking plate 751, one end of the second striking plate 752 corresponds to one side of the moving contact 61, and the other side of the second striking plate 752 extends into the arc extinguishing chamber 71 along the inner side wall of the striking chamber.

The magnetic conduction assembly is arranged on one side of the arc-stop plate 72, which is opposite to the arc striking cavity, and the assembly holes are preferably arranged on the arc-stop plate 72 and the magnetic conduction assembly, the central axis of the iron core 73 is perpendicular to the arc-stop plate 72, so that the two ends of the iron core 73 are inserted into the assembly plates, and the assembly of the iron core 73, the arc-stop plate 72 and the magnetic conduction assembly is simpler and more convenient.

In this embodiment, the magnetic conductive assembly includes a first magnetic yoke 741 and a magnetic conductive plate 742 that are arranged side by side, the first magnetic yoke 741 corresponds to the middle part of the arc striking cavity, the magnetic conductive plate 742 corresponds to the area of the arc striking cavity near the moving contact 61, one side of the first magnetic yoke 741 near the fixed contact 62 is provided with a second assembly hole 7411 corresponding to the first assembly hole 721, and the end part of the iron core 73 is sequentially inserted into the first assembly hole 721 and the second assembly hole 7411; in addition, a mounting groove may be provided on a side of the arc-stop plate 72 facing away from the arc striking cavity, and the magnetic conductive assembly is assembled by the mounting groove in a limited manner, and of course, the mounting groove is used for assembling the first yoke 741 and the magnetic conductive plate 742 respectively, in the first mounting groove 722 and the second mounting groove 723 respectively. Of course, as other degraded embodiments, the magnetic conductive assembly may also include the first magnetic yoke 741 or the magnetic conductive plate 742.

As shown in fig. 13, the first magnetic yoke 741 includes a first plate 7410 and a second plate 7412, the first plate 7410 is attached to one side of the arc-shaped plate 72 opposite to the arc-shaped cavity, a through hole as a second assembly hole 7411 is formed in the middle of the first plate 7410, one side edge of the first plate 7410 is connected with one end side wall of the second plate 7412, so that an included angle is formed between the first plate 7410 and the plate surface of the second plate 7412, in fig. 13, a transition section is connected between the first plate 7410 and the second plate 7412, so that the first plate 7410 and the plate surface of the second plate 7412 are perpendicular to each other, the other side edge of the second plate 7412 is attached to one side of the arc-shaped plate 72 opposite to the arc-shaped cavity, preferably the other side edge of the second plate 7412 is in plug-in limit with the arc-shaped plate 72, the other end of the second plate 7412 is bent to form a bending part 7413, the bending part 7413 and the first plate 7410 are located on the same side of the second plate 7412, in this embodiment, a first mounting groove 722 is provided on one side of the arc-shaped baffle 72 opposite to the arc striking cavity, the first mounting groove 723 comprises a first mounting area and a second mounting area which are mutually connected, the first mounting area is used for assembling the first plate 7410 and is provided with a first assembling hole 721, the groove bottom recession degree of the second mounting area is larger than that of the first mounting area, a slot for inserting the limiting second plate 7412 is formed in the second mounting area, the first yoke 741 is assembled in the first mounting groove 722, and the first yoke 741 and the arc-shaped baffle 72 are kept flat on the side opposite to the arc striking cavity.

As shown in fig. 3 and 7, when the contact mechanism is energized, it is known that the iron core 73 generates a magnetic field according to ampere's law, the magnetic field is generated in the arc striking cavity by the magnetic conduction assembly, the magnetic field of the arc generated in the arc striking cavity when the contact mechanism is disconnected receives lorentz force, the lorentz force and direction are marked with F and arrow directions in the drawing, in addition, the arc barrier 72 is made of gas generating material, and the arc is quickly introduced into the arc extinguishing chamber 71 under the common drive of gas generated at high temperature and lorentz force. In addition, the central axis of the iron core 73 is perpendicular to the arc-stop plate 72, so that the magnetic field direction generated by the iron core 73 is perpendicular to the arc-stop plate 72, and the maximum lorentz force is obtained by the arc.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. An operating mechanism comprising a connecting rod assembly and a hasp assembly, characterized in that: the connecting rod assembly is in sliding fit with the hasp assembly, the connecting rod assembly is connected between the moving contact (61) and the handle mechanism (2) in a linkage mode, the hasp assembly comprises an unlocking piece (41), a locking piece (42) and a locking reset piece (43), the unlocking piece (41) is assembled in a rotating mode and in a hasp fit with the locking piece (42), the connecting rod assembly comprises a reset piece (34) used for driving the connecting rod assembly to move from a closing position to a separating brake position, and the locking reset piece (43) is used for enabling the unlocking piece (41) which is released from the hasp to be restored to be buckled with the locking piece (42).

2. The operating mechanism of claim 1, wherein: the connecting rod assembly and the hasp assembly are assembled between the first positioning plate (13) and the second positioning plate (14).

3. The operating mechanism of claim 2, wherein: the first locating plate (13) is provided with a first locating portion (131), the lock catch reset piece (43) is connected between the unlocking piece (41) and the first locating portion (131), the second locating plate (14) is provided with a second locating portion (141), and the reset piece (34) is connected between the second locating portion (141) and the connecting rod assembly.

4. The operating mechanism of claim 1, wherein: one end of the locking piece (42) is rotationally connected, the other end of the locking piece (42) is in snap fit with one end of the unlocking piece (41), a sliding groove (421) is formed in the middle of the locking piece (42), and the connecting rod assembly is in sliding fit with the sliding groove (421).

5. The operating mechanism of claim 4, wherein: the connecting rod assembly comprises a first connecting rod (31), a second connecting rod (32) and a third connecting rod (33) which are sequentially connected in a linkage mode, one end of the first connecting rod (31) is connected with the handle mechanism (2), the connecting position of the first connecting rod (31) and the second connecting rod (32) is in sliding fit with the sliding groove (421), the reset piece (34) is connected with one end of the third connecting rod (33), and the other end of the third connecting rod (33) is used for being connected with the moving contact (61).

6. The operating mechanism of claim 4, wherein: unlock piece (41) are including integrated into one piece's rotation portion (410), second trigger portion (412), hasp portion (413) and reset connection portion (414), the middle part of rotation portion (410) is equipped with the shaft hole that is used for the rotation assembly, second trigger portion (412) and hasp portion (413) are located the relative both sides of rotation portion (410), and the end of second trigger portion (412) outwards extends along the direction of keeping away from rotation portion (410), and the direction of keeping away from second trigger portion (412) is along the tangential direction that is on a parallel with the shaft hole extension of hasp portion (413), and reset connection portion (414) outwards bulge extension along the central axis direction that is on a parallel with the shaft hole.

7. The operating mechanism of claim 4, wherein: the sliding groove (421) is bent at one end far away from the unlocking piece (41) to form an arc-shaped avoidance groove (421 a).

8. The operating mechanism of claim 1, wherein: after the unlocking piece (41) and the locking piece (42) are in release of the snap fit, when the reset piece (34) drives the connecting rod assembly to move from the closing position to the opening position, the connecting rod assembly drives the locking piece (42) to reset, and the lock catch reset piece (43) drives the unlocking piece (41) to reset, so that the unlocking piece (41) and the locking piece (42) are restored to be in snap fit.

9. A circuit breaker, includes casing, its characterized in that: an operating mechanism as claimed in any one of claims 1 to 8 is fitted within the housing.

10. The circuit breaker according to claim 9, characterized in that: a short-circuit protection mechanism and/or an overload protection mechanism (9) are arranged in the shell, and the short-circuit protection mechanism and the overload protection mechanism (9) are matched with the unlocking piece (41) to trigger the unlocking piece (41) to unlock and rotate; the two ends of the shell are provided with a pair of wiring terminals, the contact mechanism comprises a moving contact (61) and a fixed contact (62) which are respectively and electrically connected with the pair of wiring terminals, and the short-circuit protection mechanism and/or the overload protection mechanism (9) and the fixed contact (62) are connected with the same wiring terminal.

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