CN219106038U - Operating mechanism and circuit breaker - Google Patents

Abstract

An operating mechanism and a circuit breaker, the operating mechanism includes a connecting rod assembly and a hasp assembly, the connecting rod assembly is slidingly fitted with the hasp assembly, the connecting rod assembly is linked and connected between a moving contact and a handle mechanism, and the hasp The assembly includes an unlocking part, a locking part and a lock reset part, the unlocking part is rotatably assembled and snap-fitted with the locking part, and the connecting rod assembly includes a reset part for driving the connecting rod assembly to move from the closing position to the opening position, The lock resetting part is used for restoring the buckle between the unlocking part and the locking part that have released the snap fit. The buckle assembly of the operating mechanism of the utility model restores the buckle structure after unlocking, does not need manual operation to restore the buckle structure, has fewer parts, and has the advantages of compact structure, stable cooperation and convenient operation.

Description

An operating mechanism and a circuit breaker

technical field

The utility model relates to the field of low-voltage electrical appliances, in particular to an operating mechanism and a circuit breaker.

Background technique

A circuit breaker is a switching device used to cut off and connect the load circuit, and cut off the fault circuit to prevent the expansion of the accident so as to ensure the safe operation of the load circuit. In some existing products, the operating mechanism includes multiple parts such as jumpers, locks, levers, and contact supports. After a fault such as a short circuit or overload occurs, the lock is triggered to rotate, so that the jumper and the lock are released. buckle to open the circuit breaker, but the existing operating mechanism of the sliding fit between the connecting rod component and the buckle component needs to be manually operated to make it snap fit again after the fault is eliminated. This kind of operating mechanism uses many parts. Coordination is more complicated and inconvenient to operate.

Utility model content

The purpose of the utility model is to overcome at least one defect of the prior art, and provide an operating mechanism and a circuit breaker that can automatically restore the hasp after tripping.

In order to achieve the above object, the utility model adopts the following technical solutions:

An operating mechanism, comprising a link assembly and a hasp assembly, the link assembly is slidingly fitted with the hasp assembly, the link assembly is linked and connected between a movable contact and a handle mechanism, and the hasp assembly includes an unlocking member, The locking part and the lock reset part, the unlocking part is rotatably assembled and snap-fitted with the lock part, the connecting rod assembly includes a reset part for driving the connecting rod assembly to move from the closed position to the open position, and the lock reset part is used It is used to restore the buckle between the unlocking part and the locking part that are released from the cooperation of the hasp.

Preferably, it further includes a first positioning plate and a second positioning plate oppositely arranged, and the link assembly and the buckle 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 reset part is connected between the unlocking part and the first positioning part, the second positioning plate is provided with a second positioning part, and the reset part is connected to the second positioning part. Between the second positioning part and the connecting rod assembly.

Preferably, one end of the locking piece is rotatably connected, the other end of the locking piece is snap-fitted with one end of the unlocking piece, and a sliding groove is provided in the middle of the locking piece, and the connecting rod assembly slides and fits with the sliding groove.

Preferably, the linkage assembly includes a first linkage, a second linkage and a third linkage connected sequentially, one end of the first linkage is connected to the handle mechanism, and the first linkage and the second linkage The connecting part of the connecting rod is slidably matched with the chute, the reset member is connected with one end of the third connecting rod, and the other end of the third connecting rod is used for connecting with the moving contact.

Preferably, the unlocking member includes an integrally formed rotating part, a second trigger part, a hasp part and a reset connection part, the middle part of the rotating part is provided with a shaft hole for rotating assembly, the second trigger part and the hasp The buckles are located on opposite sides of the rotating part, the end of the second triggering part extends outward along a direction away from the rotating part, the buckle part extends along a tangent parallel to the shaft hole and away from the second triggering part, and the reset connecting part extends along the It protrudes outwards in a direction parallel to the central axis of the shaft hole.

Preferably, the slide groove is bent at an end away from the unlocking member to form an arc-shaped escape groove.

Preferably, after the unlocking part is released from the snap fit with the locking part, when the reset part drives the connecting rod assembly to move from the closing position to the opening position, the connecting rod assembly drives the locking part to reset, and the lock reset part drives the unlocking part to reset, so that The unlocking piece and the locking piece restore the hasp.

The utility model also provides a circuit breaker, which includes a casing, and the above-mentioned operating mechanism is assembled in the casing.

Further, a short-circuit protection mechanism and/or an overload protection mechanism are provided inside the housing, and the short-circuit protection mechanism and the overload protection mechanism cooperate with the unlocking member to trigger the unlocking and rotation of the unlocking member; a pair of wires are provided at both ends of the housing The terminal and the contact mechanism include a movable contact and a static contact respectively electrically connected to a pair of terminals, and the short-circuit protection mechanism and/or overload protection mechanism and the static contacts are connected to the same terminal.

In the operating mechanism of the utility model and the circuit breaker using the operating mechanism, the buckle assembly of the operating mechanism restores the buckle structure after unlocking, and does not need manual operation to restore the buckle structure, and has fewer parts, and has a compact structure, With the advantages of stable and convenient operation.

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

Description of drawings

Fig. 1 is a schematic structural view of the circuit breaker of the present invention (excluding the second positioning plate);

Fig. 2 is a schematic structural diagram of part C enlarged in Fig. 1;

Fig. 3 is a schematic structural view of the circuit breaker of the present invention (the side with the second positioning plate);

Fig. 4 is a schematic structural view of the circuit breaker of the present invention (the side with the first positioning plate);

Fig. 5 is a structural schematic diagram of the handle mechanism, the operating mechanism and the moving contact in the utility model;

Fig. 6 is a structural schematic diagram of a reset member and a lock in the utility model;

Fig. 7 is a schematic diagram of the magnetic field induced by the arc extinguishing system in the utility model;

Fig. 8 is a top view of the arc extinguishing system in the utility model when the gate is opened;

Fig. 9 is a top view of the arc extinguishing system in the utility model when the switch is closed;

Fig. 10 is an exploded schematic diagram of the arc extinguishing system in the utility model (excluding the arc extinguishing chamber);

Fig. 11 is a structural schematic diagram of the unlocking part in the utility model;

Fig. 12 is a schematic diagram of cooperation between the short-circuit protection mechanism and the unlocking member in the utility model;

Fig. 13 is a schematic structural diagram of the first magnetic yoke in the present invention.

Detailed ways

The following examples are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the operating mechanism and the circuit breaker of the present utility model. The operating mechanism and circuit breaker of the present invention are not limited to the description of the following embodiments.

As shown in Figures 1, 3 and 4, the circuit breaker includes a housing, a pair of terminals is provided at both ends of the housing, and a handle mechanism 2, an operating mechanism, a contact mechanism and Arc extinguishing system, in which the handle mechanism 2 is rotatably assembled on the housing, and the contact mechanism includes a moving contact 61 and a static contact 62 that cooperate with each other, and the moving contact 61 and the static contact 62 are respectively electrically connected to a pair of terminals, The contact 62 is fixedly assembled in the housing, and the handle mechanism 2, the operating mechanism and the moving contact 61 are sequentially linked and connected. By operating the handle mechanism 2, the moving contact 61 can be driven to rotate toward or away from the fixed contact 62, thereby realizing circuit breaker. The closing and opening of the device; the arc extinguishing system cooperates with the contact mechanism to extinguish the arc generated when the contact mechanism is broken. In addition, a protection mechanism can also be provided in the housing, and the protection mechanism cooperates with the operating mechanism. When a short circuit or overload fault occurs in the circuit breaker, the protection mechanism triggers the operating mechanism to trip, so that the operating mechanism drives the moving contact 61 away from the static contact 62, protecting The mechanisms include a short-circuit protection mechanism and/or an overload protection mechanism 9, which are used to trigger tripping of the operating mechanism when a short-circuit or overload fault occurs.

The operating mechanism includes a connecting rod assembly and a hasp assembly, wherein the connecting rod assembly and the hasp assembly are slidingly fitted, and the handle mechanism 2 is linked with the moving contact 61 through the connecting rod assembly. By operating the handle mechanism 2, the connecting rod assembly and the hasp The components are slidably matched to drive the moving contact 61 close to or away from the static contact 62. The protection mechanism is arranged on one side of the hasp assembly. When a fault occurs, the protection mechanism triggers the release of the hasp assembly. The sliding fit is used to drive the handle mechanism 2 and the movable contact 61 to rotate in the opening direction.

The improvement of the present application is that the connecting rod assembly includes a reset member 34, which is used to drive the connecting rod assembly to move from the closing position to the opening position, and the hasp assembly includes an unlocking member 41, a locking member 42 and a locking reset Part 43, wherein the unlocking part 41 is snap fit with one end of the lock part 42, and the lock reset part 43 is used to restore the snap fit between the unlocking part 41 and the locking part 42 after the snap fit is released. After the unlocking part 41 and the locking part 42 release the snap fit, the reset part 34 drives the connecting rod assembly and the hasp assembly to slide and move, and when the connecting rod assembly moves from the closing position to the opening position, the lock reset part 43 drives to unlock The part 41 resets, so that the unlocking part 41 and the locking part 42 restore the hasp. The buckle assembly of the operating mechanism restores the buckle structure after unlocking, does not require manual operation to restore the buckle structure, has fewer parts, and has the advantages of compact structure, stable fit and convenient operation.

Further, a positioning plate for assembling the operating mechanism is provided in the housing, the positioning plate includes a first positioning plate 13 and a second positioning plate 14 which are oppositely arranged, and the connecting rod assembly and the buckle assembly are assembled on the first positioning plate 13 and the second positioning plate 13. Between the positioning plates 14, the positioning plate provides assembly positions for the reset member 34 and the lock reset member 43, so that the operating mechanism forms a modular structure. Specifically, the first positioning plate 13 is provided with a first positioning portion 131, and the lock lock The reset member 43 is connected between the unlocking member 42 and the first positioning portion 131, the second positioning plate 14 is provided with the second positioning portion 141, and the reset member 34 is connected between the connecting rod assembly and the second positioning portion 141, of course, reset The member 34 can be connected between the unlocking member 42 and the housing, and the lock reset member 43 can also be connected between the connecting rod assembly and the housing, but it is not conducive to forming a modular structure. In addition, the handle mechanism 2 and the movable contact 61 can also be rotatably supported between the first positioning plate 13 and the second positioning plate 14 .

Further, the operating mechanism also includes an indicator 5 for indicating the opening and closing state. The indicator 5 is driven to rotate by the connecting rod assembly to switch the indicating state. Instruct the window to obtain the state of the operating mechanism.

A specific structure of the circuit breaker in this embodiment is provided in conjunction with Figures 1-11. The circuit breaker includes a housing, preferably the housing includes a base 11 and an upper cover 12 that cover each other, and a pair of terminals are provided at both 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 arranged in the casing between a pair of terminals. There is a handle hole for the handle mechanism 2 to protrude from. The operating mechanism is connected with the handle mechanism 2 and is located in the middle of the housing. The arc extinguishing system is correspondingly arranged at the lower part of the housing and located below the handle mechanism 2. The short circuit protection mechanism is located in the operating mechanism. Between the arc extinguishing system, a protection mechanism is provided in the gap between a terminal and the operating mechanism. The short-circuit protection mechanism and the overload protection mechanism 9 cooperate with the operation mechanism respectively, and the short-circuit protection mechanism and the overload protection mechanism 9 are close to and connected. on the same terminal block.

As shown in Figures 1, 2 and 5, the operating mechanism includes a pair of opposite positioning plates, which are respectively a first positioning plate 13 and a second positioning plate 14, and the first positioning plate 13 and the second positioning plate 14 are arranged on the base in parallel. 11 and the upper cover 12, between the first positioning plate 13 and the second positioning plate 14 are equipped with a connecting rod assembly and a hasp assembly, the handle mechanism 2 can be rotatably supported on the first positioning plate 13 and the second positioning plate 14 Between them, the handle mechanism 2 is linked and connected with the moving contact 61 through the connecting rod assembly. The hasp assembly is located on one side of the handle mechanism 2 and can drive the handle mechanism 2 to turn in the direction of opening. The short circuit protection mechanism and the overload protection mechanism 9 are located in the shell The position close to the hasp assembly in the body, by driving the hasp assembly to unbuckle, the connecting rod assembly and the hasp assembly slide and fit, move from the closing position to the opening position and drive the moving contact 61 and the handle mechanism 2 to the opening direction turn.

As shown in Figures 5, 6 and 11, the connecting rod assembly is located on the side of the hasp assembly facing away from the short-circuit protection mechanism, that is, the connecting rod assembly is located between the upper side wall of the housing and the hasp assembly, and the connecting rod assembly includes the first A connecting rod 31, a second connecting rod 32, a third connecting rod 33 and a reset member 34, wherein one end of the first connecting rod 31 is linked with the handle mechanism 2, and one end of the second connecting rod 32 is connected with the first connecting rod 31 along the The connection line connected between the handle mechanism 2 and the movable contact 61 performs reciprocating motion, preferably the reciprocating motion trajectory is substantially parallel to the side wall of the housing provided with the handle hole, and the other end of the second connecting rod 32 is connected to the third connecting rod 32. One end of the rod 33 is connected in linkage, and the other end of the third connecting rod 33 is connected in linkage with the movable contact 61. The reset member 34 is used to provide a reset force for the third connecting rod 33, so that the connecting rod assembly and the buckle assembly are slidably matched by a combination. The gate position is moved to the opening position, preferably the reset member 34 is a spring, one end of the spring is connected with the positioning plate, and the other end is connected with the third connecting rod 33 .

The hasp assembly includes an unlocking member 41, a locking member 42 and a lock reset member 43, wherein the unlocking member 41 is rotatably assembled between the first positioning plate 13 and the second positioning plate 14, and the locking member 42 is assembled between the first positioning plate 13 and the second positioning plate 14. Between the second positioning plate 14, and the unlocking part 41 is located between the locking part 42 and the handle mechanism 2, in Fig. 1-5, the locking part 42 is located in the housing between the handle mechanism 2 and the moving contact 61 and parallel to the device There is a side wall of the housing with a handle hole. In this embodiment, the locking piece 42 is parallel to the upper side wall of the housing (see Figure 1-4), and a sliding groove 421 is provided in the middle of the locking piece 42. The sliding groove 421 is basically Parallel to the side wall of the housing with the handle hole, the end of the chute 421 away from the handle mechanism 2 is bent downward toward the direction of the moving contact 61 to form an arc-shaped avoidance groove 421a, the first connecting rod 31 and the second connecting rod 32 slides through the chute 421, usually the short shaft connected between the first connecting rod 31 and the second connecting rod 32 slides through the chute 421, the short shaft is slidably fitted with the chute 421, and the sliding The slot 421 restricts the sliding track of one end of the second connecting rod 32. When the connecting rod assembly is in the closed position, the joint between the first connecting rod 31 and the second connecting rod 32 is located in the arc-shaped avoidance groove 421a. In the opening position, the connection between the first connecting rod 31 and the second connecting rod 32 is located at one end of the chute 421 away from the arc-shaped escape groove 421a; one end of the locking member 42 is rotationally connected with the positioning plate, and the other end of the locking member 42 The part is snap-fitted with the unlocking part 41 near the end of the locking part 42. In this embodiment, the short-circuit protection mechanism and the overload protection mechanism 9 cooperate with the unlocking part 41 respectively. When a short-circuit or overload fault occurs, the unlocking part 41 rotates and reset Part 34 drives the connecting rod assembly to slide with the hasp assembly, and moves from the closing position to the opening position, that is, the locking part 42 rotates at a certain angle, so that the joint between the first connecting rod 31 and the second connecting rod 32 moves from the arc to the opening position. When the shape avoidance groove 421a is moved out, the joint between 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 can be turned back to its original position. It can also be considered that the locking member 42 is reset by the connecting rod assembly. The lock reset part 43 drives the unlocking part 41 to turn back to the original position, so that the unlocking part 41 and the locking part 42 restore the snap fit. When the connecting rod assembly is driven by the reset part 34 to slide leftward along the chute 421, The connecting rod assembly drives the handle mechanism 2 and the moving contact 61 to move in the opening direction until the connecting rod assembly moves to the leftmost opening position of the chute 421. In this embodiment, the lock reset part 43 is connected to the unlocking part 41 and the positioning plate are used to provide reset force for the unlocking member 41, and the latch reset member 43 is preferably a tension spring.

The operating mechanism also includes an energy storage link 35. The energy storage link 35 is located on the side of the first positioning plate 13 facing away from the second positioning plate 14. The first positioning plate 13 separates the energy storage link 35 and the connecting rod assembly. One end of the energy storage link 35 is linked with the handle mechanism 2, and the other end of the energy storage link 35 extends to the side of the movable contact 61, and the movable contact 61 is provided with a limit portion 611 that can abut against the energy storage link 35 , during the closing process, fast closing is realized through the cooperation of the energy storage connecting rod 35 and the limiting part 611; In Fig. 4, the first track groove 151 is an arc-shaped groove, and the first end of the energy storage connecting rod 35 slides through the first track groove 151 to be connected with the handle mechanism 2, so that the first end of the energy storage connecting rod 35 follows the handle mechanism 2. The rotation slides along the first track groove 151, and a return spring is connected between the first end of the energy storage link 35 and the handle mechanism, and the second end of the energy storage link 35 is between the movable contact 61 and the static contact 62. and the moving track of the second end of the energy storage link 35 intersects with the moving track of the stopper 611 at one point. In this embodiment, the limiting portion 611 is located on the boss structure on the side of the movable contact 61 facing the static contact 62 .

Of course, the track groove can also include a second track groove, the middle part of the second track groove intersects with the moving track of the limiting part 611 at only one point, and the second end of the energy storage connecting rod 35 moves along the second track groove for contact with the limiter. The position part 611 cooperates, and the second track groove can be set on the first positioning plate 13, and can also be set on the second positioning plate 14, only need to ensure that the second track groove corresponds to the position between the movable contact 61 and the static contact 62 , and there is only one intersection point between the extension direction of the second track groove and the movement track of the stopper 611, so that the second end of the energy storage connecting rod 35 can move along the second track groove. In addition, only one positioning plate can be provided A single positioning plate can realize the function of positioning assembly by cooperating with the housing, but it is not conducive to forming a modular structure of the operating mechanism.

In addition, when the positioning plate is not used to separate the connecting rod assembly and the energy storage connecting rod 35, that is, when the energy storing connecting rod 35 and the connecting rod assembly are jointly assembled on the first positioning plate 13 and the second positioning plate 14, if the energy storage The connecting rod 35 can be guaranteed to move on a certain track, and the track groove can also be omitted.

As shown in Figure 5, the operating mechanism also includes an indicator 5, in which the indicator 5 is rotatably mounted on the side of the first positioning plate 13 facing away from the second positioning plate 14, and the side wall of the housing with the handle hole is provided with an indicator Window, one end of the indicating part 5 is used as an indicating part corresponding to the indicating window, an active part protrudes from the side of the indicating part 5 facing the connecting rod assembly, and a groove is opened on the first positioning plate 13 corresponding to the active part , so that the driven part can be driven by the connecting rod assembly. In this embodiment, the side of the second positioning plate 14 is a hollowed out area, and the driven part cooperates with the second connecting rod 32, that is, on the side of the second connecting rod 32 The driving part is arranged on the side, and preferably the driving part includes a closing driving part and an opening driving part, and the closing driving part, the opening driving part and the driven part cooperate to push the indicator 5 to swing to switch the state, which is used to indicate the circuit breaker The opening and closing status.

As shown in Figures 1-5, the contact mechanism includes a static contact 62 and a moving contact 61 that are arranged oppositely. The static contact 62 includes a conductive plate 621, which is arranged along the middle of the housing. One end of the conductive plate 621 is connected to the The middle part of the conductive plate 621 is parallel to the side wall of the housing with the handle hole. In Fig. The plate surface of the conductive plate 621 is provided with a contact, and the contact is opposite to the movable contact 61 and is used to cooperate with the contact of the movable contact 61; the movable contact 61 is provided with an energy storage part 612, and the energy storage part 612 is a The head 61 provides the closing drive, preferably the energy storage part 612 is arranged between the movable contact 61 and the third connecting rod 33; the movable contact 61 includes a movable contact body, and a for The contact that cooperates with the static contact 62 is provided with a limiting portion 611 protruding from the side of the moving contact body facing the static contact 62. The limiting portion 611 cooperates with the second end of the energy storage connecting rod 35, and the limiting portion 611 and the contact of the movable contact 61 are located on the same side of the movable contact body, of course, the limiting part 611 can also be arranged at other positions of the movable contact body, such as the side wall of the movable contact body adjacent to the position of the contact , In addition, the limiting part 611 can also be a groove structure, but it needs to ensure that the second end of the energy storage connecting rod 35 can smoothly extend into or move out of the groove.

When closing, the handle mechanism 2 drives the connecting rod assembly to rotate in the direction of closing, and the joint between the first connecting rod 31 and the second connecting rod 32 reciprocates along the chute 421, which is shown in Figures 1, 2 and 5 by The left end of the chute 421 moves to the right end of the chute 421, the third connecting rod 33 drives the moving contact 61 to rotate in a direction close to the static contact 62, and the second end of the energy storage connecting rod 35 moves down to the moving contact 61 Between the static contact 62, the second end of the energy storage connecting rod 35 abuts against the limit portion 611, and the moving contact 61 stops rotating. As the handle mechanism 2 continues to rotate in the direction of closing, the connecting rod assembly is driven to make the The energy storage member 612 stores energy, and at the same time, the continued rotation of the handle mechanism 2 makes the second end of the energy storage connecting rod 35 continue to move downward, thereby separating from the limiting part 611 to release the limited fit, and at the second end of the second connecting rod 32 After the two ends are separated from the limiting part 611, the energy storage part 612 releases energy to drive the moving contact 61 to continue closing and rotating, and the energy storing part 612 releases energy to speed up the closing rotation of the moving contact 61, thereby realizing fast closing. Closed in place Referring to Figures 1, 2, 4 and 5, when closed in place, the connection between the first connecting rod 31 and the second connecting rod 32 is located in the arc-shaped avoidance groove 421a. During the closing process, the closing driving part of the second connecting rod 32 pushes the indicating member 5 to rotate in the closing direction, so that the indicating member 5 switches the indicating state.

When the brake is opened, the handle mechanism 2 drives the connecting rod assembly to rotate in the direction of opening the brake, and the joint between the first connecting rod 31 and the second connecting rod 32 reciprocates along the chute 421, that is, in Figs. The right end of the chute 421 moves to the left end of the chute 421, the third connecting rod 33 drives the movable contact 61 to rotate in a direction away from the static contact 62, and the second end of the energy storage connecting rod 35 moves upward, when the energy storage connecting rod When 35 and the stopper 611 just started to contact, the moving track of the energy storage connecting rod 35 is fine-tuned by the return spring, so that the energy storage link 35 and the stopper 611 cannot abut against the stopper, and the opening is in place, referring to Fig. 4 . During the opening process, the opening driving part of the second connecting rod 32 pushes the indicating member 5 to rotate in the opening direction, so that the indicating member 5 switches the indicating state.

As shown in Figures 1, 3 and 4, in this embodiment, the short-circuit protection mechanism and the overload protection structure cooperate with the hasp assembly respectively. In the figure, the short-circuit protection mechanism is located under the hasp assembly, and the short-circuit protection mechanism includes a second magnetic Yoke 82 and armature 81, the armature 81 is located between the second yoke 82 and the buckle assembly, the second yoke 82 is connected with the static contact 62, one end of the armature 81 is connected in rotation, and the other end of the armature 81 is in the second yoke 82 can be rotated towards the direction close to the second yoke 82 under the suction action of 82. A lever 811 for triggering the rotation of the unlocking member 41 is provided on the side facing the buckle assembly. In this embodiment, the lever 811 is connected with the armature 81 is set at an angle, so that one end of the driving lever 811 is more inclined to the direction of the unlocking member 41, which is more conducive to triggering the rotation of the unlocking member 41 and the unlocking of the locking member 42 when a short-circuit fault occurs; The conductive plate 621 of the contact 62 is connected, and the second magnetic yoke 82 and the armature 81 are respectively located on both sides of the conductive plate 621. It can also be understood that the conductive plate 621 is connected to the second magnetic yoke 82 and passes through the second magnetic yoke 82 The gap between the armature 81 makes the conductive plate 621 of the fixed contact 62 a part of the short circuit protection mechanism to simplify its structure, wherein the armature 81 rotates between the conductive plate 621 and the hasp assembly, and the second yoke 82 is located at The side of the conductive plate 621 facing away from the hasp assembly, the side of the armature 81 facing away from the static contact 62 is provided with a lever 811, the lever 811 can drive the unlocking part 41 to rotate, so that the unlocking part 41 and the locking part 42 are released, The locking part 42 is in a rotatable state, so that the connecting rod assembly is driven to reset by the reset part 34, that is, to move in the opening direction, so that the connecting rod assembly drives the moving contact 61 and the handle mechanism 2 to open the brake.

A specific embodiment of a short-circuit protection mechanism is provided in conjunction with FIGS. 3 and 12. The short-circuit protection mechanism includes an armature 81, a second yoke 82, a rotating connection shaft and an armature reset member, wherein the armature 81 is a plate-shaped structure, and the armature 81 is opposite The two side edges of the two sides are bent and extended to form side edges. An assembly hole is provided at the same end of a pair of sides. A rotating connection shaft is installed in the assembly hole, and an instantaneous spring is set on the rotation connection shaft. The armature 81 is rotatably assembled in the housing, and the instantaneous action value can be set by adjusting the spring force value to drive the armature 81 to reset. There is a relief groove 812 on the plate surface of the armature 81, which is used to make way for the unlocking part 41 The unlocking rotation of the shifting groove 812 is formed by the edge of the side of the turning connection shaft 812 extending obliquely outwards in the direction away from the side to form the driving rod 811, and a gap is reserved between the driving rod 811 and the giving way groove 812 to make the unlocking The first unlocking portion 411 of the member 41 can correspondingly extend into the gap between the shift lever 811 and the relief groove 812, and the armature reset member is sleeved on the rotating connection shaft, preferably the armature reset member is a torsion spring, one of the armature reset members The elastic arm extends into the relief groove 812 and abuts against the edge of the relief groove 812, and the other elastic arm of the armature reset part abuts against the armature 81, so that the armature 81 can be squeezed to store energy when it rotates; the second magnetic yoke 82 is a plate-like structure as a whole, and its two side edges are bent in the same direction to form a folded edge. In this embodiment, the folded edge is located on the side facing the armature 81, and the conductive plate 621 of the static contact 62 and the second magnetic yoke 82 boards are arranged in close contact, and the conductive board 621 is located between a pair of folded edges, making the structure more compact.

One end of the overload protection mechanism 9 is connected to the same terminal with the short-circuit protection mechanism, and the other end of the overload protection mechanism 9 extends to one side of the hasp assembly. The overload protection mechanism 9 includes a bimetallic strip. The movable end of the sheet extends toward the direction of the handle mechanism 2, so that the end of the unlocking member 41 close to the handle mechanism 2 corresponds to between the handle mechanism 2 and the movable end of the bimetallic sheet, by driving the unlocking member 41 near the end of the handle mechanism 2, so that The unlocking part 41 rotates to realize separation and unlocking from the locking part 42 .

In this embodiment, the unlocking part 41 is provided with a first triggering part 411, a second triggering part 412 and a buckle part 413. The first triggering part 411 and the second triggering part 412 correspond to the opposite sides of the unlocking part 41. In this embodiment, the first trigger part 411 is located at the end away from the handle mechanism 2, that is, the first trigger part 411 is close to the short-circuit protection mechanism for cooperating with the short-circuit protection mechanism. In addition, the buckle part 413 and the first trigger part 411 are arranged side by side. It is arranged at the same end of the unlocking part 41, which is beneficial to shorten the unbuckled rotation distance of the unlocking part 41, reduces its occupied space, and makes the internal structure more compact; the second trigger part 412 is close to the handle mechanism 2 for contact with the bimetal Cooperate with activities.

1-6 and 11 provide a specific structure of the unlocking member 41, as shown in FIG. And the reset connecting part 414, the rotating part 410 is cylindrical, and a shaft hole for rotating assembly is provided in the middle of the rotating part 410, and the unlocking part 41 is rotated and assembled between the first positioning plate 13 and the second positioning plate 14 through the rotating part 410 Between, the second trigger part 412 and the buckle part 413 are located on opposite sides of the rotating part 410, the first trigger part 411 and the buckle part 413 are arranged side by side, and the first trigger part 411 protrudes outward to form a hook shape. A trigger part 411 is provided with a groove structure on the side facing the second trigger part 412, and the bottom surface of the groove structure is used as a mating surface 411a for cooperating with the lever 811. Preferably, the mating surface 411a is an inclined plane. When the rod 811 is engaged, the first trigger part 411 is correspondingly located in the gap between the driving rod 811 and the relief groove 812, the mating surface 411a fits with the driving rod 811, and when the unlocking member 41 is driven to rotate, the relief groove 812 can Avoid the first triggering part 411 to prevent interference with the rotation of the unlocking part 41; the end of the second triggering part 412 extends outward along the direction away from the rotating part 410, the second triggering part 412 has a rod-shaped structure as a whole, and the buckle part 413 is parallel to the The tangent to the shaft hole extends away from the second trigger part 412, and a buckle surface is formed on one side surface of the buckle part 413 for contacting the locking part 42. The upper surface of the buckle part 413 in the figure is used for locking 42 contacts, the reset connection part 414 protrudes outward along the direction parallel to the central axis of the shaft hole, the reset connection part 414 is also cylindrical, and one end of the lock reset part 43 is connected to the reset connection part 414, and the lock reset part The other end of 43 is connected to the first positioning portion 131 of the first positioning plate 13 .

As shown in Figures 1, 3, 4 and 7-10, the arc extinguishing system is arranged in cooperation with the contact mechanism and is arranged below the housing. The arc extinguishing system includes an arc extinguishing chamber 71, and the arc extinguishing chamber 71 is arranged below the operating mechanism. , specifically located below the hasp assembly, in Figures 1 and 3, the short circuit protection mechanism and the static contact 62 are located between the arc extinguishing chamber 71 and the hasp assembly, making full use of the internal space of the housing to make the structure more compact and overload protection The mechanism 9 is located on the side of the arc extinguishing chamber 71 facing away from the moving contact 61, and a pair of arc shielding plates 72 are arranged on one side of the arc extinguishing chamber 71. The surface of the arc shielding plate 72 is parallel to that of the positioning plate. The arc-leading chamber connected to the arc-extinguishing chamber 71 is formed between the arc-breaking plates 72, the contact mechanism is correspondingly arranged in the arc-leading chamber, and the static contact 62 is fixed on the side of the arc-leading chamber close to the arc-extinguishing chamber 71, specifically One end of the conductive plate 621 extends in a direction parallel to the arc extinguishing chamber 71 and away from the movable contact 61, and the middle part of the conductive plate 621 is bent and arranged around the side of the iron core 73 facing away from the arc extinguishing chamber 71, as shown in the figure The conductive plate 621 surrounds the circumferential side wall that surrounds the iron core 73 into two thirds, and the other end of the conductive plate 621 extends tangentially to the arc chamber along the iron core 73 and is provided with a contact that cooperates with the movable contact 61; The contact 61 can swing in the arc chamber to get close to or away from the static contact 62. The iron core 73 is arranged on the side of the arc chamber close to the arc extinguishing chamber 71. The middle part of the conductive plate 621 of the static contact 62 is attached to the iron core 73. and along the outer curved surface of the iron core 73, so that the end of the conductive plate 621 provided with a contact extends along the tangential direction of the iron core 73 to the direction away from the hasp assembly. In Figures 1-4, the static contact 62 The conductive plate 621 surrounds the side of the iron core 73 facing the buckle component and the moving contact 61 .

A first arc-leading plate 751 and a second arc-leading plate 752 respectively matched with the contact mechanism are arranged in the arc-leading chamber, wherein the first arc-leading plate 751 cooperates with the static contact 62, and one end of the first arc-leading plate 751 It is connected with the static contact 62, that is, one end of the first arc striker 751 is connected along the direction of the contact end of the conductive plate 621, and the middle part of the first arc striker 751 is bent back to form a U shape so that the first arc striker 751 The other end extends into the arc extinguishing chamber 71, so that the conductive plate 621 cooperates with the first arc leading plate 751 to form a ring structure around the outer periphery of the iron core 73; the second arc leading plate 752 is opposite to the first arc leading plate 751 One end of the second arc-leading plate 752 corresponds to one side of the movable contact 61 , and the other side of the second arc-leading plate 752 extends into the arc extinguishing chamber 71 along the inner wall of the arc-leading chamber.

The side of the arc shield 72 facing away from the arc chamber is provided with a magnetic conduction assembly. Preferably, the arc shield 72 and the magnetic conduction assembly are provided with assembly holes. The central axis of the iron core 73 is perpendicular to the arc shield 72, so that the iron core 73 The two ends of the two ends are inserted into the assembly plate, so that the assembly of the iron core 73, the arc shield 72 and the magnetic permeation assembly is easier.

In this embodiment, the magnetic guide assembly includes a first magnetic yoke 741 and a magnetic guide plate 742 arranged side by side. The first magnetic yoke 741 corresponds to the middle of the arc chamber, and the magnetic guide plate 742 corresponds to the arc chamber near the moving contact. 61, the side of the first yoke 741 close to the fixed contact 62 is provided with a second assembly hole 7411 corresponding to the first assembly hole 721, and the end of the iron core 73 is sequentially inserted into the first assembly hole 721 and the second assembly hole 7411. Two assembly holes 7411; In addition, a mounting groove can be provided on the side of the arc shield 72 facing away from the arc chamber, and the magnetic conduction component is limited by the mounting groove. Of course, the mounting grooves are respectively the first mounting groove 722 and the second mounting groove 722. The slots 723 are respectively used for assembling the first magnetic yoke 741 and the magnetic conductive plate 742 . Certainly, as other degraded embodiments, the magnetic permeable component may also include the first magnetic yoke 741 or the magnetic permeable plate 742 .

As shown in Figure 13, the first yoke 741 includes a first plate 7410 and a second plate 7412. The first plate 7410 is attached to the side of the arc shield 72 facing away from the arc chamber. In the through hole of the second assembly hole 7411, one side edge of the first plate 7410 is connected to one end side wall of the second plate 7412, so that the first plate 7410 forms an angle with the surface of the second plate 7412. In FIG. 13, the first A transition section is connected between the first plate 7410 and the second plate 7412, so that the surfaces of the first plate 7410 and the second plate 7412 are perpendicular to each other, and the other side edge of the second plate 7412 is facing away from the arc shield 72 for arc strike One side of the cavity is attached, preferably the other side edge of the second plate 7412 is preferably plugged with the arc shield 72 to limit, the other end of the second plate 7412 is bent to form a bent part 7413, and the bent part 7413 is connected to the first The plate 7410 is located on the same side of the second plate 7412. In this embodiment, a first mounting groove 722 is provided on the side of the arc shield 72 facing away from the arc chamber, and the first mounting groove 723 includes first mounting holes connected to each other. area and the second installation area, the first installation area is used to assemble the first plate 7410 and is provided with the first assembly hole 721 in the first installation area, the groove bottom depression of the second installation area is greater than the groove bottom depression of the first installation area To the extent that the second installation area forms a slot for plugging in the second plate 7412, and the first yoke 741 is assembled in the first installation groove 722, so that the first yoke 741 and the arc shield 72 are on the back Keep one side of the pilot chamber flat.

As shown in Figures 3 and 7, when the contact mechanism is energized, according to Ampere's law, it can be known that the iron core 73 generates a magnetic field, and the magnetic conduction component generates a magnetic field in the arc chamber. When the contact mechanism is broken, an arc is generated in the arc chamber. The magnetic field is subjected to Lorentz force, and the label F and the arrow direction in the figure indicate the Lorentz force and direction. In addition, the arc shield 72 is made of a gas-generating material, driven by the gas generated at high temperature and the Lorentz force, The arc is quickly introduced into the arc extinguishing chamber 71 . In addition, the central axis of the iron core 73 is perpendicular to the arc baffle 72 , so that the direction of the magnetic field generated by the iron core 73 is perpendicular to the arc baffle 72 , which is beneficial for the arc to obtain the maximum Lorentz force.

It should be noted that, in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" etc. are based on the The orientation or positional relationship, or the orientation or positional relationship that is usually placed during use, is only for the convenience of description, and does not indicate that the device or element referred to must have a specific orientation, so it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating relative importance.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection 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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