CN118098892A - Operating mechanism and circuit breaker - Google Patents

Abstract

An operating mechanism and a circuit breaker, wherein the operating mechanism comprises a connecting rod assembly and a buckle assembly, wherein the connecting rod assembly and the buckle assembly are slidably matched, the connecting rod assembly is linked and connected between a moving contact and a handle mechanism, an energy storage component is provided between the moving contact and the connecting rod assembly, the operating mechanism also comprises an energy storage connecting rod linked and connected with the handle mechanism, the moving contact is provided with a limiting portion, the handle mechanism drives the moving contact to rotate in a closing direction and drives the energy storage connecting rod to move through the connecting rod assembly, the limiting portion first cooperates with the energy storage connecting rod to limit the moving contact so that the moving contact stops rotating and the energy storage component stores energy, after the energy storage connecting rod moves to separate from the limiting portion and releases the limit, the energy storage component releases energy to drive the moving contact to continue closing and rotating. The energy storage connecting rod moves with the handle mechanism and first cooperates with the limiting portion to stop the moving contact from rotating, storing energy for the energy storage component, and then the energy storage component releases energy to drive the moving contact to move in the direction of the static contact, thereby realizing rapid closing, and directly cooperates with the moving contact, which is conducive to realizing a miniaturized design of the circuit breaker.

Description

An operating mechanism and a circuit breaker

Technical Field

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

Background technique

A circuit breaker is a switch device used to cut off and connect load circuits, and to cut off fault circuits to prevent accidents from expanding, thereby ensuring the safe operation of load circuits. When the circuit breaker is closed, the handle mechanism needs to be driven manually or by a motor to drive the operating mechanism to move to close the moving contact and the stationary contact. If the closing speed is not fast enough, the spark between the moving contact and the stationary contact will last for a long time, causing the contact to burn out, thereby reducing the service life of the product.

In some existing products, the handle mechanism and the contact support can first be limited to each other to allow the energy storage component to store energy. After the limit is released, the energy storage component releases energy to drive the moving contact to close quickly. However, since the handle mechanism and the contact support rotate relative to each other and the distance between the two is large, a large rotation space needs to be reserved, which is not conducive to the miniaturization design of the circuit breaker.

Summary of the invention

The object of the present invention is to overcome at least one defect of the prior art and to provide an operating mechanism and a circuit breaker which can close the circuit quickly and occupy a small space.

To achieve the above object, the present invention adopts the following technical solutions:

An operating mechanism includes a connecting rod assembly and a buckle assembly, wherein the connecting rod assembly and the buckle assembly are slidably matched, the connecting rod assembly is linked and connected between a moving contact and a handle mechanism, an energy storage member is provided between the moving contact and the connecting rod assembly, the operating mechanism further includes an energy storage connecting rod linked and connected to the handle mechanism, and the moving contact is provided with a limit portion.

The handle mechanism drives the moving contact to rotate in the closing direction and drives the energy storage connecting rod to move through the connecting rod assembly. The limit part first cooperates with the energy storage connecting rod to stop the moving contact from rotating and store energy in the energy storage component. After the energy storage connecting rod moves to separate from the limit part and releases the limit, the energy storage component releases energy to drive the moving contact to continue closing and rotating.

Preferably, it further comprises a positioning plate, on which a track groove for limiting the moving track of the energy storage connecting rod is provided, and the track groove is slidably matched with the energy storage connecting rod.

Preferably, the trajectory groove includes a first trajectory groove, the first trajectory groove corresponds to the handle mechanism, the first end of the energy storage connecting rod slides through the first trajectory groove and is connected to the handle mechanism, the second end of the energy storage connecting rod moves between the moving contact and the static contact, and the moving trajectory of the second end of the energy storage connecting rod intersects with the moving trajectory of the limiting part at one point.

Preferably, the trajectory groove further includes a second trajectory groove, the middle portion of the second trajectory groove intersects with the moving trajectory of the limiting portion only at one point, and the second end of the energy storage connecting rod moves along the second trajectory groove to cooperate with the limiting portion.

Preferably, the positioning plate comprises a first positioning plate and a second positioning plate which are arranged opposite to each other, the connecting rod assembly and the buckle assembly are assembled between the first positioning plate and the second positioning plate, and the energy storage connecting rod slides through the track groove and cooperates with the limiting part.

Preferably, the first positioning plate is provided with a first track groove, which is an arc-shaped groove. The energy storage connecting rod is located on the side of the first positioning plate away from the second positioning plate. One end of the energy storage connecting rod passes through the first track groove and is connected to the handle mechanism. The other end of the energy storage connecting rod extends in a direction close to the second positioning plate and can move between the moving contact and the static contact.

Preferably, the moving contact comprises a moving contact body, a contact point cooperating with the stationary contact is provided on one side of the end of the moving contact body, and a limiting portion is protruded from the middle of one side of the moving contact body facing the stationary contact.

Preferably, the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a reset member, one end of the first connecting rod is connected to the handle mechanism, the other end of the first connecting rod is linked to one end of the second connecting rod and reciprocates in the housing, the other end of the second connecting rod is linked to one end of the third connecting rod, the other end of the third connecting rod is linked to the moving contact, the energy storage member is arranged between the third connecting rod and the moving contact, and the reset member provides a reset force for the third connecting rod;

The buckle assembly includes an unlocking member, a locking member and a lock reset member. The unlocking member is rotatably assembled between the handle mechanism and the locking member. The unlocking member is buckled with one end of the locking member, and the other end of the unlocking member is matched with the handle mechanism. A slide groove is provided in the middle of the locking member, and the movement trajectory of the first connecting rod and the second connecting rod is limited by the slide groove. The lock reset member provides a reset driving force for the unlocking member.

The present invention further provides a circuit breaker, comprising a housing, in which the operating mechanism as described above is installed.

Furthermore, a pair of connecting terminals are provided at both ends of the shell, a short-circuit protection mechanism is provided between the static contact and the buckle assembly, and an overload protection mechanism is provided between the end of the short-circuit protection mechanism away from the moving contact and the connecting terminal. The overload protection mechanism, the short-circuit protection mechanism and the static contact are connected to the same connecting terminal, and the overload protection mechanism and the short-circuit protection mechanism respectively cooperate with the unlocking part of the buckle assembly.

According to the operating mechanism of the present invention and the circuit breaker using the operating mechanism, during the closing process, the energy storage connecting rod moves with the handle mechanism, and the energy storage connecting rod and the limit portion cooperate to stop the rotation of the moving contact first, so as to store energy for the energy storage component. After the energy storage connecting rod is separated from the limit portion, the energy storage component releases energy to drive the moving contact to move in the direction of the static contact, thereby realizing rapid closing. The operating mechanism directly cooperates with the limit portion of the moving contact, does not need to occupy too much internal space, has stable cooperation, and is conducive to realizing the miniaturized design of the circuit breaker.

In addition, the track groove provides a moving track for the energy storage connecting rod to prevent the energy storage connecting rod from interfering with other mechanisms.

In addition, the connecting rod assembly and the energy storage connecting rod are separated by a positioning plate, and a track groove cooperating with the energy storage connecting rod is provided on the positioning plate. The connecting rod assembly and the buckle assembly are assembled on the positioning plate, so that the operating mechanism forms a relatively independent whole, which is convenient for assembly in the circuit breaker and prevents mutual interference of the internal mechanisms of the circuit breaker.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a circuit breaker in the present invention (excluding the second positioning plate);

FIG2 is a schematic diagram of the structure of the enlarged portion C in FIG1;

FIG3 is a schematic diagram of the structure of the circuit breaker of the present invention (a side with a second positioning plate);

FIG4 is a schematic diagram of the structure of the circuit breaker of the present invention (a side with a first positioning plate);

FIG5 is a schematic diagram of the structure of the handle mechanism, the operating mechanism and the moving contact in the present invention;

FIG6 is a schematic diagram of the structure of the reset member and the lock catch in the present invention;

FIG7 is a schematic diagram of a magnetic field induced by an arc extinguishing system in the present invention;

FIG8 is a top view of the arc extinguishing system of the present invention when the switch is open;

FIG9 is a top view of the arc extinguishing system of the present invention when the circuit breaker is closed;

FIG10 is an exploded schematic diagram of the arc extinguishing system of the present invention (excluding the arc extinguishing chamber);

FIG11 is a schematic diagram of the structure of the unlocking member of the present invention;

12 is a schematic diagram of the cooperation between the short circuit protection mechanism and the unlocking member in the present invention;

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

Detailed ways

The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the operating mechanism and circuit breaker of the present invention. 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 shell, a pair of terminals are provided at both ends of the shell, and a handle mechanism 2, an operating mechanism, a contact mechanism and an arc extinguishing system are provided between the pair of terminals, wherein the handle mechanism 2 is rotatably assembled on the shell, and the contact mechanism includes a moving contact 61 and a stationary contact 62 that cooperate with each other, the moving contact 61 and the stationary contact 62 are electrically connected to the pair of terminals respectively, and the stationary contact 62 is fixedly assembled in the shell, the handle mechanism 2, the operating mechanism and the moving contact 61 are linked and connected in sequence, and the moving contact 61 can be driven to rotate in a direction close to or away from the stationary contact 62 by operating the handle mechanism 2, thereby realizing the closing and opening of the circuit breaker; the arc extinguishing system cooperates with the contact mechanism to extinguish the arc generated when the contact mechanism is disconnected. In addition, a protection mechanism may be provided in the shell, 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. The protection mechanism includes a short circuit protection mechanism and/or an overload protection mechanism 9, which is used to trigger the operating mechanism to trip when a short circuit or overload fault occurs.

The improvement of the present application is that the operating mechanism includes a connecting rod assembly and a latch assembly, wherein the connecting rod assembly and the latch assembly are slidably matched, and the handle mechanism 2 is linked to the moving contact 61 through the connecting rod assembly. By operating the handle mechanism 2, the connecting rod assembly and the latch assembly are slidably matched to drive the moving contact 61 to approach or move away from the static contact 62, and the protection mechanism is arranged on one side of the latch assembly. When a fault occurs, the protection mechanism triggers the latch assembly to unlatch, and the connecting rod assembly and the latch assembly are slidably matched to drive the handle mechanism 2 and the moving contact 61 to rotate in the opening direction; the operating mechanism also includes an energy storage connecting rod 35, which is connected to the handle mechanism 2, and the energy storage connecting rod 35 moves under the drive of the handle mechanism 2, and the energy storage connecting rod 35 cooperates with the limiting portion 611 arranged on the moving contact 61, so that the energy storage member 612 (Figures 5-6) arranged between the moving contact 61 and the connecting rod assembly stores energy, thereby realizing rapid closing of the contact mechanism.

Specifically, when the connecting rod assembly drives the moving contact 61 to rotate in the closing direction, the limit portion 611 first cooperates with the energy storage connecting rod 35 to stop the moving contact 61 from rotating, and the handle mechanism 2 and the connecting rod assembly continue to rotate to close the switch so that the energy storage component 612 stores energy. After the energy storage connecting rod 35 moves with the handle mechanism 2 and separates from the limit portion 611 to release the limit, the energy storage component 612 releases energy to drive the moving contact 61 to continue and quickly rotate in the closing direction.

Preferably, as shown in FIGS. 2 and 4 , the moving track of the energy storage connecting rod 35 is limited by a track groove, which can be provided on the side wall of the housing of the circuit breaker, or provided on a positioning plate fixed in the housing for assembling the operating mechanism, and the middle of the track groove intersects at one point with the moving track of the limiting portion 611. In this embodiment, the track groove is provided on the positioning plate.

Furthermore, the positioning plate includes a first positioning plate 13 and a second positioning plate 14 that are relatively arranged, and the connecting rod assembly and the buckle assembly are assembled between the first positioning plate 13 and the second positioning plate 14. The energy storage connecting rod 35 can be arranged between the first positioning plate 13 and the second positioning plate 14, or, arranged on the side of the first positioning plate 13 (second positioning plate 14) facing away from the second positioning plate 14 (first positioning plate 13). Preferably, a track groove is arranged on the positioning plate so that the energy storage connecting rod 35 slides through the track groove and cooperates with the limiting portion 611. In this way, the first positioning plate 13 and the second positioning plate 14 provide assembly positions for the connecting rod assembly, the buckle assembly and the energy storage connecting rod 35, so that the operating mechanism can form a relatively independent module, which is convenient for assembly in the housing of the circuit breaker. In addition, the handle mechanism 2 and the moving contact 61 can also be rotatably supported between the first positioning plate 13 and the second positioning plate 14.

A reset spring is also connected between the handle mechanism 2 and the energy storage link 35. The reset spring can enable the energy storage link 35 to maintain its original state when not under stress. Preferably, the reset spring is connected to one end of the energy storage link 35 that is connected to the handle mechanism 2. During the opening process, the connecting rod assembly drives the moving contact 61 to rotate in the closing direction, and the energy storage link 35 also moves with the opening rotation of the handle mechanism 2. When the energy storage link 35 and the limit portion 611 just start to contact, the reset spring fine-tunes the moving trajectory of the energy storage link 35 so that the energy storage link 35 and the limit portion 611 cannot be limitedly matched.

Furthermore, the operating mechanism also includes an indicator 5 for indicating the opening and closing state, and the indicator 5 is driven to rotate by the connecting rod assembly to switch the indication state. The indicator 5 cooperates with the indication window set in the shell, which is convenient for obtaining the state of the operating mechanism from the indication window.

Another 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 buckle assembly includes an unlocking member 41, a locking member 42 and a lock reset member 43, wherein the unlocking member 41 is snap-fitted with one end of the locking member 42, and the lock reset member 43 is used to restore the snap-fit of the unlocking member 41 and the locking member 42 that have been released from the snap-fit. After the unlocking member 41 and the locking member 42 are released from the snap-fit, the reset member 34 drives the connecting rod assembly and the buckle assembly to slide and move, and when the connecting rod assembly moves from the closing position to the opening position, the lock reset member 43 drives the unlocking member 41 to reset, so that the unlocking member 41 and the locking member 42 are restored to snap-fit. The buckle assembly of the operating mechanism restores the buckle structure after unlocking, and does not need to be manually operated to restore the buckle structure, and has fewer parts, and has the advantages of compact structure, stable matching and convenient operation.

Furthermore, the positioning plate provides an assembly position 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 reset member 43 is connected between the unlocking member 42 and the first positioning portion 131. The second positioning plate 14 is provided with a second positioning portion 141, and the reset member 34 is connected between the connecting rod assembly and the second positioning portion 141. Of course, the reset member 34 can be connected between the unlocking member 42 and the shell, and the lock reset member 43 can also be connected between the connecting rod assembly and the shell, but it is not conducive to forming a modular structure.

Another improvement of the present application is the arc extinguishing system coordinated with the contact mechanism, the arc extinguishing system includes an arc extinguishing chamber 71 and a pair of arc isolating plates 72 arranged on one side of the arc extinguishing chamber 71, the pair of arc isolating plates 72 are spaced apart to form an arc striking chamber connected to the arc extinguishing chamber 71, the contact mechanism is correspondingly arranged in the arc striking chamber, wherein the static contact 62 is located on one side of the arc striking chamber close to the arc extinguishing chamber 71, the moving contact 61 swings in the arc striking chamber, an iron core 73 is arranged in the arc striking chamber, and the conductive plate 621 of the static contact 62 at least partially surrounds the conductive plate 621 of the static contact 62. A magnetic conductive component is provided around the outside of the iron core 73 and on the side of each arc isolation plate 72 facing away from the arc striking chamber. The magnetic conductive component cooperates with the iron core 73 to generate a magnetic field for blowing the arc in the arc striking chamber. After the contact mechanism is energized, the iron core 73 generates a magnetic field near the static contact 62, and a magnetic field is generated in the arc striking chamber through the magnetic conductive component. When the contact mechanism is opened, the arc generated by the disconnection of the contact mechanism is quickly blown into the arc extinguishing chamber 71, thereby shortening the time that the arc stays at the static contact 62 and optimizing the arc extinguishing effect of the arc extinguishing system.

Preferably, the arc extinguishing system further comprises a first arc-striking plate 751 and a second arc-striking plate 752 which are arranged at intervals and are relatively arranged, wherein the first arc-striking plate 751 is arranged along one side of the arc-striking cavity close to the stationary contact 62, one end of the first arc-striking plate 751 is connected to the end of the conductive plate 621 of the stationary contact 62, and the first arc-striking plate 751 cooperates with the conductive plate 621 to form a structure surrounding the outer side of the iron core 73, and the first arc-striking plate 751 cooperates with the conductive plate 621 of the stationary contact 62 to form a structure surrounding the outer side of the iron core 73, which is conducive to the generation of a magnetic field by the iron core 73 in the power-on state, and can also make the internal structure more compact. In addition, the connection structure between the first arc-striking plate 751 and the conductive plate 621 is the same as the prior art, and the arc extinguishing system can be conveniently modified by adding an iron core 73 in the annular area formed by the existing stationary contact 62 and the first arc-striking plate 751. Of course, it is also possible for the conductive plate 621 of the static contact 62 to completely surround the outer circumference of the iron core 73 and then be connected to the first arc-striking plate 751, that is, the conductive plate 621 is wrapped around the iron core 73 at least one circle and then connected to the first arc-striking plate 751, but the usage of the conductive plate 621 and the space occupancy rate will increase.

Preferably, the short-circuit protection mechanism arranged between the arc extinguishing system and the operating mechanism adopts a snap-on short-circuit protection mechanism, which includes an armature 81 and a second yoke 82. The armature 81 rotates under the attraction of the second yoke 82. A lever 811 is provided on the side of the armature 81 facing the unlocking member 41. One end of the lever 811 is inclined toward the unlocking member 41 to trigger the unlocking member 41 to rotate. By setting the lever 811 closer to the unlocking member 41 to trigger the unlocking member 41, the armature 81 can swing a smaller angle to trigger the unlocking member 41, thereby making the internal structure of the circuit breaker more compact.

Furthermore, a first trigger portion 411 and a buckle portion 413 are arranged side by side at the end of the same end of the unlocking member 41, and the buckle portion 413 is buckled with one end of the locking member 42, and the first trigger portion 411 is opposite to the lever 811, which is beneficial to shortening the swing amplitude of the unlocking member 41 when it is unlocked and rotated, and improving the matching stability.

Specifically, the first trigger portion 411 protrudes toward the direction close to the short-circuit protection mechanism, and the first trigger portion 411 preferably protrudes to form a hook shape. The lever 811 is obliquely arranged on the plate surface of the armature 81, and a gap for the first trigger portion 411 to extend into is formed between the lever 811 and the plate surface of the armature 81. Preferably, the mating surface 411a of the first trigger portion 411 and the lever 811 is an inclined surface. Preferably, the handle mechanism 2, the buckle assembly and the arc extinguishing chamber 71 are sequentially arranged on one side of the housing, the static contact 62 and the short-circuit protection mechanism are located between the arc extinguishing chamber 71 and the unlocking member 41, and the connecting rod assembly is located on the side of the buckle assembly facing away from the short-circuit protection mechanism, that is, the connecting rod assembly and the short-circuit protection mechanism are respectively located on both sides of the buckle assembly, which is conducive to shortening the distance between the lever 811 and the unlocking member 41 of the short-circuit protection mechanism, making its internal structure more compact.

In conjunction with Figures 1-13, a specific structure of the circuit breaker in this embodiment is provided, the circuit breaker includes a shell, preferably the shell includes a base 11 and an upper cover 12 that cover each other, a pair of terminals are provided at both ends of the shell, 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 shell between the pair of terminals, the handle mechanism 2 is rotatably assembled on the upper part of the shell, and the upper side wall of the shell is provided with a handle hole for the handle mechanism 2 to extend out, the operating mechanism is linked to the handle mechanism 2 and is located in the middle part of the shell, the arc extinguishing system is correspondingly arranged in the lower part of the shell and 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 arranged in the gap between a terminal and the operating mechanism, the short-circuit protection mechanism and the overload protection mechanism 9 respectively cooperate with the operating mechanism, and the short-circuit protection mechanism and the overload protection mechanism 9 are close to and connected to the same terminal.

As shown in Figures 1, 2 and 5, the operating mechanism includes a pair of relatively arranged 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 arranged in parallel between the base 11 and the upper cover 12. A connecting rod assembly and a buckle assembly are installed 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 linked to the moving contact 61 through the connecting rod assembly. The buckle assembly is located on 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 in the shell near the buckle assembly. By driving the buckle assembly to unfasten, the connecting rod assembly and the buckle assembly are slidably matched, moving from the closing position to the opening position and driving the moving contact 61 and the handle mechanism 2 to rotate in the opening direction.

As shown in Figures 5, 6 and 11, the connecting rod assembly is located on the side of the latch assembly facing away from the short-circuit protection mechanism, that is, the connecting rod assembly is located between the upper side wall of the shell and the latch assembly, and the connecting rod assembly includes a first 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 to the handle mechanism 2, and the end of the second connecting rod 32 connected to the first connecting rod 31 reciprocates along the line connected between the handle mechanism 2 and the moving contact 61, and the moving trajectory of the reciprocating motion is preferably roughly parallel to the side wall of the shell provided with the handle hole, the other end of the second connecting rod 32 is linked to one end of the third connecting rod 33, and the other end of the third connecting rod 33 is linked to the moving contact 61, and 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 latch assembly slide together to move from the closed position to the open position, and the reset member 34 is preferably a spring, one end of the spring is connected to the positioning plate, and the other end is connected to the third connecting rod 33.

The buckle 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, the locking member 42 is assembled between the first positioning plate 13 and the second positioning plate 14, and the unlocking member 41 is located between the locking member 42 and the handle mechanism 2. In Figures 1-5, the locking member 42 is located in the shell between the handle mechanism 2 and the moving contact 61 and is parallel to the side wall of the shell with the handle hole. In this embodiment, the locking member 42 is parallel to the upper side wall of the shell (see Figures 1-4), and a slide groove 421 is provided in the middle of the locking member 42, and the slide groove 421 is basically parallel to the side wall of the shell with the handle hole. The end of the slide groove 421 away from the handle mechanism 2 is bent downward in the direction close to the moving contact 61 to form an arc-shaped avoidance groove 421a, and the connection between the first connecting rod 31 and the second connecting rod 32 slides through the slide groove 421, usually by a short shaft connected between the first connecting rod 31 and the second connecting rod 32 sliding through the slide groove 421, the short shaft and the slide groove 421 are slidably matched, and the slide groove 421 limits the sliding trajectory of one end of the second connecting rod 32. When the connecting rod assembly is in the closing position, the connection between the first connecting rod 31 and the second connecting rod 32 is located in the arc-shaped avoidance groove 421a, and when the connecting rod assembly is in the opening position, the connection between the first connecting rod 31 and the second connecting rod 32 is located away from the arc-shaped avoidance groove 421a. The locking member 42 is connected to one end of the slide groove 421 of the arc-shaped avoidance groove 421a; one end of the locking member 42 is rotatably connected to the positioning plate, and the other end of the locking member 42 is snap-fitted with an end of the unlocking member 41 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, and the reset member 34 drives the connecting rod assembly to slide with the snap assembly to move from the closing position to the opening position. That is, the locking member 42 rotates a certain angle to move the connection between the first connecting rod 31 and the second connecting rod 32 out of the arc-shaped avoidance groove 421a, and the connection between the first connecting rod 31 and the second connecting rod 32 can be To drive the locking member 42 to rotate and return the locking member 42 to its original position. It can also be considered that the locking member 42 is reset by the connecting rod assembly, and the lock reset member 43 drives the unlocking member 41 to return to its original position, so that the unlocking member 41 and the locking member 42 resume the snap fit. In the process of the reset member 34 driving the connecting rod assembly to slide to the left along the slide groove 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 opening position at the leftmost end of the slide groove 421. In this embodiment, the lock reset member 43 is connected between the unlocking member 41 and the positioning plate, and is used to provide a reset force for the unlocking member 41. The lock reset member 43 is preferably a tension spring.

The operating mechanism also includes an energy storage connecting rod 35, which is located on the side of the first positioning plate 13 facing away from the second positioning plate 14, and 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 linked to the handle mechanism 2, and 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 portion 611 that can abut against the energy storage connecting rod 35. During the closing process, the energy storage connecting rod 35 cooperates with the limiting portion 611 to achieve rapid closing. In this embodiment, the first positioning plate 13 corresponds to the handle The position of the mechanism 2 is provided with a first track groove 151, and the first track groove 151 in FIG4 is an arc-shaped groove. The first end of the energy storage connecting rod 35 slides through the first track groove 151 and is connected to the handle mechanism 2, so that the first end of the energy storage connecting rod 35 slides along the first track groove 151 as the handle mechanism 2 rotates. A reset spring is connected between the first end of the energy storage connecting rod 35 and the handle mechanism. The second end of the energy storage connecting rod 35 moves between the moving contact 61 and the stationary contact 62, and the moving track of the second end of the energy storage connecting rod 35 intersects with the moving track of the limiting portion 611 at one point. In this embodiment, the limiting portion 611 is located at a boss structure on the side of the moving contact 61 facing the stationary contact 62.

Of course, the trajectory groove can also include a second trajectory groove, the middle part of the second trajectory groove intersects with the moving trajectory of the limiting portion 611 at only one point, and the second end of the energy storage connecting rod 35 moves along the second trajectory groove to cooperate with the limiting portion 611. The second trajectory groove can be set on the first positioning plate 13, and can also be set on the second positioning plate 14. It is only necessary to ensure that the second trajectory groove corresponds to between the moving contact 61 and the static contact 62, and the extension direction of the second trajectory groove has only one intersection with the moving trajectory of the limiting portion 611, so that the second end of the energy storage connecting rod 35 moves along the second trajectory groove. In addition, only one positioning plate can be set, and a single positioning plate can achieve the function of positioning and assembly by cooperating with the shell, 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 storage connecting rod 35 and the connecting rod assembly are assembled together on the first positioning plate 13 and the second positioning plate 14, if the energy storage connecting rod 35 can be guaranteed to move along a certain trajectory, the trajectory groove can also be omitted.

As shown in Figure 5, the operating mechanism also includes an indicator 5, which is rotatably assembled on the side of the first positioning plate 13 facing away from the second positioning plate 14. The side wall of the shell with a handle hole is provided with an indicator window, and one end of the indicator 5 serves as an indicator portion corresponding to the indicator window. An actuated portion is protruded on the side of the indicator 5 facing the connecting rod assembly, and a groove is provided on the first positioning plate 13 corresponding to the actuated portion, so that the actuated portion can be driven by the connecting rod assembly. In this embodiment, the side of the second positioning plate 14 is a hollow area, and the actuated portion cooperates with the second connecting rod 32, that is, a driving portion is arranged on the side of the second connecting rod 32, and preferably the driving portion includes a closing driving portion and an opening driving portion, and the closing driving portion, the opening driving portion and the actuated portion cooperate with each other to push the indicator 5 to swing to switch the state, which is used to indicate the opening and closing state of the circuit breaker.

As shown in FIGS. 1-5 , the contact mechanism includes a stationary contact 62 and a moving contact 61 that are arranged opposite to each other. The stationary contact 62 includes a conductive plate 621, which is arranged along the middle of the shell. One end of the conductive plate 621 is connected to a terminal. The middle of the conductive plate 621 is parallel to the side wall of the shell with a handle hole. In FIGS. 1-4 , the middle of the conductive plate 621 is located below the locking member 42. The other end of the conductive plate 621 is bent and a contact is provided on the plate surface of the conductive plate 621. The contact is opposite to the moving contact 61 and is used to cooperate with the contact of the moving contact 61. The moving contact 61 is provided with an energy storage member 612, which provides a closing drive for the moving contact 61. Preferably, the energy storage member 612 It is arranged between the moving contact 61 and the third connecting rod 33; the moving contact 61 includes a moving contact body, and a contact point for cooperating with the static contact 62 is provided on one side of the end of the moving contact body, and a limiting portion 611 is protruded on the side of the moving contact body facing the static contact 62, and the limiting portion 611 cooperates with the second end of the energy storage connecting rod 35, and the limiting portion 611 and the contact point of the moving contact 61 are located on the same side of the moving contact body. Of course, the limiting portion 611 can also be arranged at other positions of the moving contact body, such as the side wall of the moving contact body adjacent to the contact point position. In addition, the limiting portion 611 can also be a groove structure, but it is necessary 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 circuit breaker, the handle mechanism 2 drives the connecting rod assembly to rotate in the closing direction, and the connection between the first connecting rod 31 and the second connecting rod 32 reciprocates along the slide groove 421, that is, it moves from the left end of the slide groove 421 to the right end of the slide groove 421 in Figures 1, 2 and 5, and the third connecting rod 33 drives the moving contact 61 to rotate in the direction close to the static contact 62, and the second end of the energy storage connecting rod 35 moves downward to between the moving contact 61 and the static contact 62, so that 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 closing direction, it drives The connecting rod assembly stores energy in the energy storage member 612. At the same time, the continued rotation of the handle mechanism 2 causes the second end of the energy storage connecting rod 35 to continue to move downward, thereby separating from the limiting portion 611 and releasing the limiting cooperation. After the second end of the second connecting rod 32 separates from the limiting portion 611, the energy storage member 612 releases energy to drive the moving contact 61 to continue closing and rotating. The energy storage member 612 releases energy to accelerate the closing rotation of the moving contact 61, thereby achieving rapid closing. For the closing position, refer to Figures 1, 2, 4 and 5. When the closing position is 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 drive unit of the second connecting rod 32 pushes the indicator 5 to rotate in the closing direction, so that the indicator 5 switches the indicating state.

When opening the gate, the handle mechanism 2 drives the connecting rod assembly to rotate in the opening direction, and the connection between the first connecting rod 31 and the second connecting rod 32 reciprocates along the slide groove 421, that is, it moves from the right end of the slide groove 421 to the left end of the slide groove 421 in Figures 1, 2 and 5, and the third connecting rod 33 drives the moving contact 61 to rotate in the 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 35 and the limit part 611 just start to contact, the return spring fine-tunes the moving trajectory of the energy storage connecting rod 35 so that the energy storage connecting rod 35 and the limit part 611 cannot abut against the limit, and the opening is in place, see Figure 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 buckle assembly respectively. In the figure, the short-circuit protection mechanism is located below the buckle assembly. The short-circuit protection mechanism includes a second yoke 82 and an armature 81. The armature 81 is located between the second yoke 82 and the buckle assembly. The second yoke 82 is connected to the static contact 62. One end of the armature 81 is rotatably connected. The other end of the armature 81 can be rotated toward the second yoke 82 under the attraction of the second yoke 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 arranged at an angle to the armature 81 so that one end of the lever 811 is more inclined toward the direction of the unlocking member 41. In the event of a short-circuit fault, it is more conducive to triggering the unlocking member 41 to rotate and unfasten the locking member 42; in Figure 3, the second yoke 82 and the static The conductive plate 621 of the contact 62 is connected, and the second 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 yoke 82 and passes through the gap between the second yoke 82 and the armature 81, so that the conductive plate 621 of the static contact 62 becomes a part of the short-circuit protection mechanism to simplify its structure, wherein the armature 81 rotates between the conductive plate 621 and the latch assembly, the second yoke 82 is located on the side of the conductive plate 621 facing away from the latch assembly, and a lever 811 is provided on the side of the armature 81 facing away from the static contact 62. The lever 811 can drive the unlocking member 41 to rotate, so that the unlocking member 41 is unlocked from the locking member 42, and the locking member 42 is in a rotatable state, so that the connecting rod assembly is driven to reset by the reset member 34, that is, moves in the opening direction, so that the connecting rod assembly drives the moving contact 61 and the handle mechanism 2 to open.

In conjunction with Figures 3 and 12, a specific embodiment of a short-circuit protection mechanism is provided, which includes an armature 81, a second magnetic yoke 82, a rotating connecting shaft and an armature reset member, wherein the armature 81 is a plate-like structure, and the side edges of the armature 81 are bent and extended to form a side edge, and a mounting hole is provided at the same end of a pair of side edges, and a rotating connecting shaft is mounted in the mounting hole, and a momentary spring is sleeved on the rotating connecting shaft. The armature 81 is rotated and assembled in the housing by the rotating connecting shaft, and the momentary action value can be adjusted by adjusting the spring force value to set the armature 81 to reset, and a clearance groove 812 is provided on the plate surface of the armature 81, and the clearance groove 812 is used to make way for the unlocking rotation of the unlocking member 41, and the edge of the clearance groove 812 close to the rotating connecting shaft is inclined and extended outward in a direction away from the side edge to form a lever 81 1. A gap is reserved between the lever 811 and the clearance groove 812, so that the first unlocking portion 411 of the unlocking member 41 can be correspondingly extended into the gap between the lever 811 and the clearance groove 812. The armature reset member is sleeved on the rotating connecting shaft. Preferably, the armature reset member is a torsion spring. One elastic arm of the armature reset member extends into the clearance groove 812 and abuts against the edge of the clearance groove 812. The other elastic arm of the armature reset member abuts against the armature 81, so that the armature 81 can be squeezed to store energy when rotating. 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. The conductive plate 621 of the static contact 62 is arranged in contact with 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 is connected to the same terminal block as the short-circuit protection mechanism, and the other end of the overload protection mechanism 9 extends to one side of the buckle assembly. The overload protection mechanism 9 includes a bimetallic strip. In Figures 1 and 3, the movable end of the bimetallic strip extends toward 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 strip. By driving the unlocking member 41 close to the end of the handle mechanism 2, the unlocking member 41 is rotated to separate and unlock from the locking member 42.

In this embodiment, the unlocking member 41 is provided with a first trigger portion 411, a second trigger portion 412 and a buckle portion 413. The first trigger portion 411 and the second trigger portion 412 correspond to opposite sides of the unlocking member 41. In this embodiment, the first trigger portion 411 is located at an end away from the handle mechanism 2, that is, the first trigger portion 411 is close to the short-circuit protection mechanism for cooperating with the short-circuit protection mechanism. In addition, the buckle portion 413 and the first trigger portion 411 are arranged side by side at the same end of the unlocking member 41, which is beneficial to shorten the unlocking rotation distance of the unlocking member 41, reduce its occupied space, and make the internal structure more compact; the second trigger portion 412 is close to the handle mechanism 2 for cooperating with the movable end of the bimetallic strip.

1-6 and 11, a specific structure of an unlocking member 41 is provided. As shown in FIG11, the unlocking member 41 includes an integrally formed rotating portion 410, a first trigger portion 411, a second trigger portion 412, a buckle portion 413 and a reset connecting portion 414. The rotating portion 410 is cylindrical, and an axial hole for rotating assembly is provided in the middle of the rotating portion 410. The unlocking member 41 is rotatably assembled between the first positioning plate 13 and the second positioning plate 14 through the rotating portion 410. The second trigger portion 412 and the buckle portion 413 are located on opposite sides of the rotating portion 410. The first trigger portion 411 and the buckle portion 413 are arranged side by side. The first trigger portion 411 protrudes outward to form a hook shape. A groove structure is provided on the side of the first trigger portion 411 facing the second trigger portion 412. The bottom surface of the groove structure is used as a mating surface 411a for mating with the lever 811. Preferably, the mating surface 411a is an inclined surface. When the unlocking member 41 and the lever 811 are mating, the first trigger portion 411 and the buckle portion 413 are arranged side by side. The trigger portion 411 is correspondingly located in the gap between the lever 811 and the give-way groove 812, and the matching surface 411a is in contact with the lever 811. When the unlocking member 41 is driven to rotate, the give-way groove 812 can avoid the first trigger portion 411 to prevent interference with the rotation of the unlocking member 41; the end of the second trigger portion 412 extends outward in a direction away from the rotating portion 410, and the second trigger portion 412 is a rod-shaped structure as a whole. The buckle portion 413 extends along a tangent parallel to the shaft hole in a direction away from the second trigger portion 412. A buckle surface is formed on one side surface of the buckle portion 413 for contacting with the locking member 42. The upper surface of the buckle portion 413 in the figure is used to contact with the locking member 42. The reset connection portion 414 protrudes outward and extends in a direction parallel to the central axis of the shaft hole. The reset connection portion 414 is also cylindrical. One end of the lock reset member 43 is connected to the reset connection portion 414, and the other end of the lock reset member 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 shell. The arc extinguishing system includes an arc extinguishing chamber 71. The arc extinguishing chamber 71 is arranged below the operating mechanism, specifically below the buckle 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 buckle assembly, making full use of the internal space of the shell to make the structure more compact. The overload protection mechanism 9 is located on the side of the arc extinguishing chamber 71 facing away from the moving contact 61. A pair of arc isolation plates 72 are provided on one side of the arc extinguishing chamber 71. The plate surface of the arc isolation plate 72 is parallel to the plate surface of the positioning plate. An arc striking cavity connected to the arc extinguishing chamber 71 is formed between the pair of arc isolation plates 72. The contact mechanism is correspondingly arranged in the arc striking cavity. The static contact 62 is fixed to the side of the arc striking cavity close to the arc extinguishing chamber 71. Specifically, one end of the conductive plate 621 is parallel to the arc extinguishing chamber 71. The conductive plate 621 extends in the direction away from the moving contact 61, 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. In the figure, the conductive plate 621 surrounds two-thirds of the circumferential side wall of the iron core 73, and the other end of the conductive plate 621 extends into the arc striking cavity along the tangent direction of the iron core 73 and is provided with a contact that cooperates with the moving contact 61; the moving contact 61 can swing in the arc striking cavity to approach or move away from the static contact 62, and the iron core 73 is arranged on the side of the arc striking cavity close to the arc extinguishing chamber 71. The middle part of the conductive plate 621 of the static contact 62 fits the outer side of the iron core 73 and is bent along the outer curved surface of the iron core 73, so that the end of the conductive plate 621 with the contact extends along the tangential direction of the iron core 73 in the direction away from the buckle assembly. In Figures 1-4, the conductive plate 621 of the static contact 62 surrounds the 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 are provided in the arc-striking chamber, respectively cooperating with the contact mechanism, wherein the first arc-striking plate 751 cooperates with the static contact 62, and one end of the first arc-striking plate 751 is connected to the static contact 62, that is, one end of the first arc-striking plate 751 is connected along the direction of the conductive plate 621 having one end of the contact, and the middle part of the first arc-striking plate 751 is bent 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, so that the conductive plate 621 and the first arc-striking plate 751 cooperate to form an annular structure surrounding the outer periphery of the iron core 73; the second arc-striking plate 752 is spaced apart from the first arc-striking plate 751, one end of the second arc-striking plate 752 corresponds to one side of the moving contact 61, and the other side of the second arc-striking plate 752 extends along the inner wall of the arc-striking chamber to the arc extinguishing chamber 71.

A magnetic conductive component is arranged on the side of the arc isolation plate 72 facing away from the arc striking chamber. Preferably, assembly holes are provided on the arc isolation plate 72 and the magnetic conductive component. The central axis of the iron core 73 is perpendicular to the arc isolation plate 72, so that the two ends of the iron core 73 are plugged into the assembly plate, thereby making the assembly of the iron core 73, the arc isolation plate 72 and the magnetic conductive component easier.

In this embodiment, the magnetic conductive component includes a first magnetic yoke 741 and a magnetic conductive plate 742 arranged side by side, the first magnetic yoke 741 corresponds to the middle of the arc striking cavity, the magnetic conductive plate 742 corresponds to the area of the arc striking cavity close to the moving contact 61, and the side of the first magnetic yoke 741 close to the static 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; in addition, a mounting groove can be provided on the side of the arc isolation plate 72 facing away from the arc striking cavity, and the magnetic conductive component is assembled by the mounting groove. Of course, the mounting grooves are the first mounting groove 722 and the second mounting groove 723, which are used to assemble the first magnetic yoke 741 and the magnetic conductive plate 742 respectively. Of course, as other inferior embodiments, the magnetic conductive component can also include the first magnetic yoke 741 or the magnetic conductive plate 742.

As shown in FIG13 , the first magnetic yoke 741 includes a first plate 7410 and a second plate 7412. The first plate 7410 fits the side of the arc isolation plate 72 facing away from the arc striking chamber. A through hole serving as a second assembly hole 7411 is provided in the middle of the first plate 7410. One side edge of the first plate 7410 is connected to a side wall of one end of the second plate 7412, so that the plate surfaces of the first plate 7410 and the second plate 7412 form an angle. In FIG13 , a transition section is connected between the first plate 7410 and the second plate 7412, so that the plate surfaces of the first plate 7410 and the second plate 7412 are perpendicular to each other. The other side edge of the second plate 7412 fits the side of the arc isolation plate 72 facing away from the arc striking chamber. Preferably, the other side edge of the second plate 7412 is plugged and limited with the arc isolation plate 72. The other end of the second plate 7412 is bent to form a bending portion 7413, and the bending portion 7413 and the first plate 7410 are located on the same side of the second plate 7412. In the present embodiment, a first mounting groove 722 is provided on the side of the arc isolation plate 72 facing away from the arc striking chamber. The first mounting groove 723 includes a first mounting area and a second mounting area connected to each other. The first mounting area is used to assemble the first plate 7410 and a first mounting hole 721 is provided in the first mounting area. The depression of the bottom of the second mounting area is greater than that of the bottom of the first mounting area, so that the second mounting area forms a slot for plugging in and limiting the second plate 7412. The first magnetic yoke 741 is assembled in the first mounting groove 722, so that the first magnetic yoke 741 and the arc isolation plate 72 remain flat on the side facing away from the arc striking chamber.

As shown in Figs. 3 and 7, when the contact mechanism is energized, according to Ampere's law, the iron core 73 generates a magnetic field, and the magnetic conductive component generates a magnetic field in the arc striking chamber. When the contact mechanism is disconnected, the magnetic field in the arc striking chamber is subjected to the Lorentz force. The F and arrow directions in the figure indicate the Lorentz force and direction. In addition, the arc isolation plate 72 is made of gas-generating material. Under the joint drive of 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 isolation plate 72, so that the direction of the magnetic field generated by the iron core 73 is perpendicular to the arc isolation plate 72, which is conducive to obtaining the maximum Lorentz force for the arc.

It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims (10)

1. An operating mechanism, comprising a connecting rod assembly and a buckle assembly, characterized in that: the connecting rod assembly and the buckle assembly are slidably matched, the connecting rod assembly is linked and connected between a moving contact (61) and a handle mechanism (2), an energy storage member (612) is provided between the moving contact (61) and the connecting rod assembly, the operating mechanism further comprises an energy storage connecting rod (35) linked and connected to the handle mechanism (2), the moving contact (61) is provided with a limiting portion (611), The handle mechanism (2) drives the moving contact (61) to rotate in the closing direction and drives the energy storage connecting rod (35) to move through the connecting rod assembly. The limiting portion (611) first cooperates with the energy storage connecting rod (35) to stop the moving contact (61) from rotating and causes the energy storage member (612) to store energy. After the energy storage connecting rod (35) moves to separate from the limiting portion (611) and releases the limiting, the energy storage member (612) releases energy to drive the moving contact (61) to continue rotating for closing. 2. The operating mechanism according to claim 1 is characterized in that it also includes a positioning plate, on which a track groove is provided for limiting the moving track of the energy storage connecting rod (35), and the track groove is in sliding cooperation with the energy storage connecting rod (35). 3. The operating mechanism according to claim 2 is characterized in that: the trajectory groove includes a first trajectory groove (151), the first trajectory groove (151) corresponds to the handle mechanism (2), the first end of the energy storage connecting rod (35) slides through the first trajectory groove (151) and is connected to the handle mechanism (2), the second end of the energy storage connecting rod (35) moves between the moving contact (61) and the static contact (62), and the moving trajectory of the second end of the energy storage connecting rod (35) intersects with the moving trajectory of the limiting portion (611) at one point. 4. The operating mechanism according to claim 3 is characterized in that: the trajectory groove also includes a second trajectory groove, the middle part of the second trajectory groove intersects with the moving trajectory of the limiting portion (611) only at one point, and the second end of the energy storage connecting rod (35) moves along the second trajectory groove to cooperate with the limiting portion (611). 5. The operating mechanism according to any one of claims 2-4 is characterized in that: the positioning plate includes a first positioning plate (13) and a second positioning plate (14) arranged opposite to each other, the connecting rod assembly and the buckle assembly are assembled between the first positioning plate (13) and the second positioning plate (14), and the energy storage connecting rod (35) slides through the track groove and cooperates with the limiting part (611). 6. The operating mechanism according to claim 5 is characterized in that: the first positioning plate (13) is provided with a first track groove (151), the first track groove (151) is an arc-shaped groove, the energy storage connecting rod (35) is located on the side of the first positioning plate (13) away from the second positioning plate (14), one end of the energy storage connecting rod (35) passes through the first track groove (151) and is connected to the handle mechanism (2), and the other end of the energy storage connecting rod (35) extends in a direction close to the second positioning plate (14) and can move between the moving contact (61) and the static contact (62). 7. The operating mechanism according to claim 1 is characterized in that: the moving contact (61) includes a moving contact body, a contact point cooperating with the stationary contact (62) is provided on one side of the end of the moving contact body, and a limiting portion (611) is protruding from the middle of one side of the moving contact body facing the stationary contact (62). 8. The operating mechanism according to claim 1 is characterized in that: the connecting rod assembly comprises a first connecting rod (31), a second connecting rod (32), a third connecting rod (33) and a reset member (34), one end of the first connecting rod (31) is connected to the handle mechanism (2), the other end of the first connecting rod (31) is linked to one end of the second connecting rod (32) and reciprocates in the housing, the other end of the second connecting rod (32) is linked to one end of the third connecting rod (33), the other end of the third connecting rod (33) is linked to the moving contact (61), the energy storage member (612) is arranged between the third connecting rod (33) and the moving contact (61), and the reset member (34) provides a reset force for the third connecting rod (33); The buckle assembly comprises an unlocking member (41), a locking member (42) and a lock reset member (43); the unlocking member (41) is rotatably assembled between the handle mechanism (2) and the locking member (42); one end of the unlocking member (41) is buckled with the locking member (42); the other end of the unlocking member (41) is matched with the handle mechanism (2); a slide groove (421) is provided in the middle of the locking member (42); the slide groove (421) limits the movement trajectory of the first connecting rod (31) and the second connecting rod (32); the lock reset member (43) provides a reset driving force for the unlocking member (41). 9. A circuit breaker, comprising a housing, characterized in that an operating mechanism according to any one of claims 1 to 8 is installed in the housing. 10. The circuit breaker according to claim 9 is characterized in that: a pair of connecting terminals are provided at both ends of the shell, a short-circuit protection mechanism is provided between the static contact (62) and the buckle assembly, and an overload protection mechanism (9) is provided between the end of the short-circuit protection mechanism away from the moving contact (61) and the connecting terminal, and the overload protection mechanism (9), the short-circuit protection mechanism and the static contact (62) are connected to the same connecting terminal, and the overload protection mechanism (9) and the short-circuit protection mechanism respectively cooperate with the unlocking member (41) of the buckle assembly.