CN116344279A

CN116344279A - Magnetic flux release resetting structure and circuit breaker

Info

Publication number: CN116344279A
Application number: CN202111594972.4A
Authority: CN
Inventors: 单小龙; 葛伟骏; 潘友义
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2023-06-27

Abstract

The invention relates to the field of low voltage electricity, in particular to a reset structure of a magnetic flux release, which comprises a magnetic flux release and a reset mechanism, wherein the reset mechanism comprises a deflector rod, a reset elastic piece and a push rod, and the deflector rod and the push rod are respectively pivoted; the push rod is respectively matched with an operating mechanism of the circuit breaker and the magnetic flux release, and when the magnetic flux release acts, the push rod of the magnetic flux release drives the push rod to rotate and the operating mechanism is driven to release through the push rod; after the breaker is tripped and opened, the operating mechanism or the moving contact of the breaker moves to drive the deflector rod to rotate, and the deflector rod applies acting force to the push rod through the reset elastic piece to enable the push rod to rotate in the direction of resetting the push rod; after the breaker is switched on, the moving contact is separated from the deflector rod; the magnetic flux release reset structure is simple in structure, can realize reliable reset of the magnetic flux release, and cannot damage the magnetic flux release. The invention also relates to a circuit breaker comprising the magnetic flux release resetting structure, and the circuit breaker can realize reliable resetting of the magnetic flux release.

Description

Magnetic flux release resetting structure and circuit breaker

Technical Field

The invention relates to the field of low voltage electricity, in particular to a magnetic flux release resetting structure and a circuit breaker comprising the magnetic flux release resetting structure.

Background

Residual current operated circuit breakers with an operation function unrelated to power supply voltage generally adopt a leakage signal to directly trigger a magnetic flux release to act, so that an operating mechanism is pushed to release, and a circuit is disconnected. Before the residual current operated circuit breaker is closed again, the counter force of the magnetic flux release is overcome by external force, so that the armature iron of the magnetic flux release is in contact with the magnetic yoke, the ejector rod of the magnetic flux release is reset, and the preparation is made for the reclosing of the residual current operated circuit breaker.

The existing magnetic flux release reset structure has the following problems:

1. the existing magnetic flux release has a complex reset structure;

2. the restoring force of the existing magnetic flux release resetting structure is too large in impact on the magnetic flux release, so that the contact surface of the armature and the magnetic yoke can be damaged, and the service life of the magnetic flux release is greatly reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a reset structure of a magnetic flux release, which has a simple structure, can realize the reliable reset of the magnetic flux release, and can not damage the magnetic flux release; the circuit breaker comprises the magnetic flux release resetting structure, and reliable resetting of the magnetic flux release can be achieved.

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

the reset structure of the magnetic flux release comprises the magnetic flux release and a reset mechanism, wherein the reset mechanism comprises a deflector rod, a reset elastic piece and a push rod, and the deflector rod and the push rod are respectively pivoted; the push rod is respectively matched with an operating mechanism of the circuit breaker and the magnetic flux release, and when the magnetic flux release acts, the push rod of the magnetic flux release drives the push rod to rotate and the operating mechanism is driven to release through the push rod; after the breaker is tripped and opened, the operating mechanism or the moving contact of the breaker moves to drive the deflector rod to rotate, and the deflector rod applies acting force to the push rod through the reset elastic piece to enable the push rod to rotate in the direction of resetting the push rod; after the breaker is switched on, the moving contact is separated from the deflector rod.

Preferably, the acting force applied by the reset elastic piece to the push rod is 110% -130% of the reset force for resetting the push rod.

Preferably, the reset elastic piece is arranged on the deflector rod.

Preferably, the reset elastic piece is a torsion spring, and comprises a torsion spring first end and a torsion spring second end; the driving lever comprises a driving lever spring shaft, the torsion spring is sleeved on the driving lever spring shaft, the first end of the torsion spring is matched with the driving lever, and the second end of the torsion spring is matched with the push rod.

Preferably, the shift lever further comprises a shift lever matching part matched with the moving contact, and the shift lever matching part protrudes towards the direction of the moving contact.

Preferably, the driving lever comprises a driving lever installation part, a driving lever first section, a driving lever matching part, a driving lever second section, a driving lever third section and a driving lever limiting part which are connected in sequence, the driving lever is rotatably installed on a shell of the circuit breaker through the driving lever installation part, one side of the driving lever matching part is provided with a driving lever spring shaft, the first end of the torsion spring is matched with the driving lever first section, and the second end of the torsion spring is limited between the driving lever second section and the driving lever limiting part and opposite to the driving lever third section.

Preferably, one end of the push rod is matched with the operating mechanism, the middle part of the push rod is rotatably arranged on the shell of the circuit breaker, and the other end of the push rod is matched with the reset elastic piece.

Preferably, the push rod comprises a first push rod finger, a push rod installation part, a second push rod finger and a push rod matching part which are sequentially connected, the push rod is rotatably arranged on the shell through the push rod installation part, the first push rod finger is matched with the operating mechanism, the second push rod finger is matched with the push rod, and the push rod matching part is matched with the reset elastic piece.

Preferably, the reset elastic piece is a torsion spring, and the push rod matching part is provided with a matching part slot matched with one end of the torsion spring.

Preferably, the operating mechanism comprises a locking piece and a jump piece which are respectively arranged in a rotating way, and the locking piece and the jump piece are in snap fit; the push rod is in driving fit with the jump fastener to drive the jump fastener to rotate, so that the jump fastener is released from being in snap fit with the lock fastener, and the operating mechanism is tripped.

Preferably, the operating mechanism further comprises a transmission rod, and the push rod drives the jump buckle to rotate through the transmission rod, so that the jump buckle is released from being in snap fit with the lock buckle.

Preferably, one end of the transmission rod is movably connected with the jump fastener, the other end of the transmission rod is matched with the push rod, a long strip-shaped sliding hole is formed in the middle of the transmission rod, and the transmission rod is arranged on the shell of the circuit breaker in a sliding fit mode through the long strip-shaped sliding hole and the transmission rod shaft.

Preferably, the operating mechanism further comprises a handle, a first connecting rod and a second connecting rod, one end of the first connecting rod is rotationally connected with the handle, the other end of the first connecting rod penetrates through one end of the second connecting rod and then is inserted into the waist-shaped groove on the locking piece in a sliding mode, the other end of the second connecting rod is connected with the lever drive to drive the lever to rotate, the lever is connected with the moving contact drive, and the lever reset elastic piece is connected with the lever.

A circuit breaker comprises the magnetic flux release resetting structure.

Preferably, the reset mechanism of the reset structure of the magnetic flux release and the magnetic flux release) are both positioned on one side below the operating mechanism, between the arc inlet side of the arc extinguishing chamber and one connecting terminal of the circuit breaker, the deflector rod, the reset elastic piece and the push rod are both positioned on one side of the magnetic flux release, between the arc extinguishing chamber and the magnetic flux release, and on two sides of the push rod.

The magnetic flux release resetting structure of the circuit breaker has simple structure and reliable action, and the resetting mechanism can reliably reset the magnetic flux release after the circuit breaker is tripped due to leakage current fault; and the acting force for driving the ejector rod of the magnetic flux release to reset is derived from the reset elastic piece, and the reset force of the reset elastic piece can be set according to the requirement, so that the damage of a reset mechanism to the magnetic flux release is avoided.

In addition, the setting value of the elastic reset piece to the acting force of the push rod can drive the push rod of the magnetic flux release to reset reliably on one hand, and on the other hand, the situation that the armature of the magnetic flux release and the magnetic yoke are damaged due to strong impact caused by overlarge force is prevented, so that the service life of the magnetic flux release is prolonged.

The circuit breaker comprises the magnetic flux release resetting structure, can realize reliable resetting of the magnetic flux release, and has long service life.

Drawings

Fig. 1 is a schematic structural view of a circuit breaker of the present invention, the circuit breaker being in a closed state;

fig. 2 is a schematic view of a projection structure of a reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 1;

fig. 3 is a schematic perspective view of a reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 1;

fig. 4 is a schematic structural view of the circuit breaker of the present invention, which is in a breaking state;

fig. 5 is a schematic view of a projection of the reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 4;

fig. 6 is a schematic perspective view of a reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 4;

fig. 7 is a schematic structural view of the circuit breaker of the present invention, with the magnetic flux trip action tripping the operating mechanism and the moving contact not yet disconnected from the stationary contact;

fig. 8 is a schematic view of a projection of the reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 7;

fig. 9 is a schematic perspective view of a reset structure of the magnetic flux release of the circuit breaker of the present invention in the state shown in fig. 7;

FIG. 10 is a schematic view of the assembled structure of the lever and return spring of the present invention in one view;

FIG. 11 is a schematic view of the assembled structure of the lever and return spring of the present invention in another view;

fig. 12 is a schematic view of the structure of the push rod of the present invention.

Detailed Description

The following is a further description of embodiments of the magnetic flux trip reset structure and circuit breaker of the present invention, given in connection with the examples of figures 1-12. The magnetic flux trip reset structure and the circuit breaker of the present invention are not limited to the description of the following embodiments.

As shown in fig. 1, 4 and 7, the circuit breaker of the invention comprises a shell h, an operating mechanism and a contact system, wherein the operating mechanism and the contact system are arranged in the shell h, the contact system comprises a moving contact 7a and a fixed contact which are matched for use, and the operating mechanism is in driving connection with the moving contact 7a to drive the contact system to be closed or opened so as to enable the circuit breaker to be closed or opened.

The operating mechanism of the circuit breaker can be realized by the prior art, and at least the operating mechanisms with the following two structural forms can be adopted:

as shown in fig. 1, 4 and 7, the first structural form of the operating mechanism is as follows: the operating mechanism adopts a cam-five-bar mechanism. Further, the operating mechanism comprises a handle 1a, a first connecting rod 2a, a locking piece 3a, a trip piece 4a, a second connecting rod 5a and a lever 6a, wherein the handle 1a, the locking piece 3a, the trip piece 4a and the lever 6a are respectively and rotatably arranged on a shell h, the locking piece 3a and the trip piece 4a are in snap fit, the trip piece 4a is driven by external force to rotate so as to release the snap fit for the locking piece 3a, thereby the operating mechanism is tripped, one end of the first connecting rod 2a is rotatably connected with the handle 1a, the other end of the first connecting rod passes through one end of the second connecting rod 5a and is slidably inserted in a waist-shaped groove on the locking piece 3a, the other end of the second connecting rod 5a is in driving connection with the lever 6a so as to drive the lever 6a to rotate, and the lever 6a is in driving connection with a moving contact 7 a. Further, the operating mechanism further comprises a lever resetting elastic piece, the lever resetting elastic piece 7a is connected with the lever 6a, the lever resetting elastic piece in the embodiment is a torsion spring, the torsion spring is sleeved on a rotating shaft of the lever 6a, one end of the torsion spring is matched with the shell h, the other end of the torsion spring is matched with the lever 6a, acting force is provided for the lever 6a, and when the breaker is opened or tripped, the lever 6a has a tendency of rotating towards the breaking position.

The second structural form of the operating mechanism is as follows: the operating mechanism adopts a transmission four-bar mechanism. Further, the operating mechanism comprises a handle 1a, a third connecting rod, a locking part, a trip part and a lever 6a, wherein the handle 1a and the lever 6a are respectively and rotatably arranged on the shell h, the locking part and the trip part are respectively and rotatably arranged on the lever 6a and are in snap fit, the trip part is driven by external force to rotate so as to release the snap fit with the locking part, and therefore the operating mechanism is tripped, the handle 1a is in drive fit with the locking part through the third connecting rod, and the lever is in drive connection with a moving contact of the circuit breaker.

The circuit breaker according to the invention preferably employs an actuating mechanism of the first type of construction.

As shown in fig. 1-9, the magnetic flux release reset structure of the invention comprises a magnetic flux release 4 and a reset mechanism, wherein the reset mechanism comprises a deflector rod 1, a reset elastic piece 2 and a push rod 3, and the deflector rod 1 and the push rod 3 are respectively pivoted; as shown in fig. 7-9, the push rod 3 is respectively matched with an operating mechanism of the circuit breaker and the magnetic flux release 4, when the magnetic flux release 4 acts, the push rod 4-0 of the magnetic flux release 4 is ejected to drive the push rod 3 to rotate, and the push rod 3 drives the operating mechanism to release; referring to fig. 4-6, after the circuit breaker is tripped and opened due to the action of the magnetic flux tripper 4, the moving contact 7a moves to the trip and opening position to drive the deflector rod 1 to rotate, the deflector rod 1 applies an acting force to the push rod 3 through the reset elastic piece 2, so that the push rod 3 rotates in the reset direction of the push rod 4-0 to drive the push rod 4-0 to reset; as shown in fig. 1-3, after the breaker is switched on, the moving contact 7a is separated from the deflector rod 1, so that the deflector rod 1 and the push rod 3 are in a free rotation state. Further, as shown in fig. 4-6, after the breaker is normally opened, the moving contact 7a drives the driving lever 1 to rotate, the driving lever 1 applies an acting force to the push rod 3 through the reset elastic member 2, so that the push rod 3 has a tendency to rotate in a direction of resetting the push rod 4-0, that is, when the moving contact 7a moves to the opening position, the driving lever 1 is driven to rotate, and the driving lever 1 applies an acting force to the push rod 3 through the reset elastic member 2. Further, the trip opening position of the moving contact 7a coincides with the opening position.

The reset structure of the magnetic flux release has simple structure and reliable action, and the reset mechanism can reliably reset the magnetic flux release after the circuit breaker is tripped and opened due to the leakage current fault (namely, the tripping and opening are performed due to the action of the magnetic flux release 4); and the acting force for driving the ejector rod of the magnetic flux release to reset is derived from the reset elastic piece, and the reset force of the reset elastic piece can be set according to the requirement, so that the damage of a reset mechanism to the magnetic flux release is avoided.

As another embodiment, after the circuit breaker is tripped and opened due to the action of the magnetic flux tripper 4, an operating mechanism (for example, a lever 6a or other structural members with positions changed when the moving contact 7a is switched from a closing position to a breaking position) drives the deflector rod 1 to rotate, and the deflector rod 1 applies an acting force to the push rod 3 through the reset elastic member 2, so that the push rod 3 rotates to drive the push rod 4-0 to reset.

It should be noted that, in the circuit breaker of the present invention, the magnetic flux release 4 is used for realizing leakage protection, and when leakage current is detected, the magnetic flux release 4 acts to release the operating mechanism; accordingly, the circuit breaker further includes a structure for detecting a leakage current, such as a leakage current detection coil.

After the circuit breaker is tripped due to the action of the magnetic flux tripper 4, the acting force applied by the reset elastic piece 2 to the push rod 3 is 110% -130% of the reset force for resetting the push rod 4-0. Further, after the circuit breaker is tripped by the action of the magnetic flux tripper 4, the acting force applied by the reset elastic member 2 to the push rod 3 is 120% of the reset force for resetting the push rod 4-0. The reset elastic piece can drive the ejector rod of the magnetic flux release to reliably reset on one hand for the set value of the acting force of the ejector rod, and on the other hand, the situation that the armature of the magnetic flux release and the magnetic yoke are damaged due to strong impact caused by overlarge force is prevented, so that the service life of the magnetic flux release is prolonged.

As shown in fig. 1 to 9, the return spring 2 is coupled to the lever 1. The reset elastic piece 2 can be arranged on the deflector rod 1; the reset elastic piece 2 can be integrally formed with the deflector rod 1, and is an elastic arm formed by protruding on the deflector rod 1, the deflector rod 1 main body keeps rigid and is matched with the operating mechanism or the moving contact 7a, and the elastic arm keeps elasticity to provide elastic acting force; alternatively, the reset elastic member 2 and the shift lever 1 are separate elements, respectively, and the reset elastic member 2 is mounted on the shift lever 1. Of course, as another embodiment, the reset elastic member 2 may be mounted on the housing h of the circuit breaker, but the assembly is complicated. In addition, after the breaker is tripped and opened, the movable contact 7a can indirectly or directly drive the deflector rod 1.

As shown in fig. 2 and 10-11, one implementation of the linkage between the return elastic member 2 and the shift lever 1 is as follows: the reset elastic piece 2 is a torsion spring and comprises a torsion spring first end 2-0 and a torsion spring second end 2-1; the driving lever 1 comprises a driving lever spring shaft 1-2-0, the torsion spring is sleeved on the driving lever spring shaft 1-2-0, the first end 2-0 of the torsion spring is matched with the driving lever 1, and the second end 2-1 of the torsion spring is matched with the push rod 3. The circuit breaker of the invention preferably adopts the implementation mode. After the breaker is tripped or normally opened, the moving contact 7a drives the deflector rod 1 to rotate, and the deflector rod 1 drives the reset elastic piece 2 to move towards the push rod 3 and contact with the push rod 3 so as to apply acting force to the push rod 3 and deform, so that the push rod 3 drives the push rod 4-0 to reset; after the breaker is switched on, the moving contact 7a is separated from the deflector rod 1, the second end 2-1 of the torsion spring is separated from the push rod 3 and is deformed and reset, the deflector rod 1 and the push rod 3 which bear the reset elastic piece 2 are in a free rotation state, and preparation is made for the next action of the magnetic flux release 4.

As a further embodiment, the return spring 2 and the lever 1 are coupled by: the reset elastic piece 2 is a torsion spring, the reset elastic piece is rotatably arranged on the shell h through a torsion spring mounting shaft, the first end 2-0 of the torsion spring is matched with the deflector rod 1, and the second end 2-1 of the torsion spring is matched with the push rod 3.

As a further embodiment, the return spring 2 and the lever 1 can also be coupled by: the reset elastic piece 2 is a pressure spring and can linearly move under the action of the deflector rod 1 so as to contact or be far away from the push rod 3; that is, after the breaker is tripped or normally opened, the moving contact 7a drives the deflector rod 1 to rotate, and the deflector rod 1 drives the reset elastic piece 2 to move towards the push rod 3 and contact with the push rod 3 so as to apply acting force to the push rod 3, so that the push rod 3 drives the push rod 4-0 to reset; after the breaker is switched on, the moving contact 7a is separated from the deflector rod 1, and the deflector rod 1 and the push rod 3 are in a free rotation state so as to prepare for the next action of the magnetic flux release 4.

As shown in fig. 2 and 10-11, the shift lever 1 further includes a shift lever mating portion 1-2 mated with the moving contact 7a, and the shift lever mating portion 1-2 protrudes toward the moving contact 7 a. Further, a moving contact driving protrusion is arranged at the tail end of the moving contact 7a and is matched with the deflector rod matching part 1-2.

As shown in fig. 4-6, the lever matching part 1-2 and the moving contact of the moving contact 7a are respectively located at two sides of the moving contact bridge of the moving contact 7 a.

As shown in fig. 2, 10-11, one embodiment of the lever 1 is shown: the driving lever 1 comprises a driving lever installation part 1-0, a driving lever first section 1-1, a driving lever matching part 1-2, a driving lever second section 1-3, a driving lever third section 1-4 and a driving lever limiting part 1-5 which are connected in sequence, the driving lever 1 is rotatably installed on a shell h through the driving lever installation part 1-0, a driving lever spring shaft 1-2-0 is arranged on one side of the driving lever matching part 1-2, a torsion spring first end 2-0 is matched with the driving lever first section 1-1, and a torsion spring second end 2-1 is limited between the driving lever second section 1-3 and the driving lever limiting part 1-5 and opposite to the driving lever third section 1-4. Further, the second end 2-1 of the torsion spring is abutted with the third section 1-4 of the deflector rod. Of course, the second end 2-1 of the torsion spring may not abut against the third section 1-4 of the shift lever.

As shown in fig. 2 and 10-11, the first section 1-1 of the deflector rod is provided with a first section jack 1-1-0, and the free end of the first end 2-0 of the torsion spring is bent and inserted into the first section jack 1-1-0.

As shown in fig. 2 and 10-11, the driving lever installation part 1-0, the driving lever first section 1-1, the driving lever matching part 1-2 and the driving lever second section 1-3 are positioned on a straight line; the third section 1-4 of the shifting lever is perpendicular to the second section 1-3 of the shifting lever, and the limiting part 1-5 of the shifting lever is perpendicular to the third section 1-4 of the shifting lever.

As shown in fig. 10-11, the lever fitting portion 1-2 includes an arcuate surface that fits with the moving contact 7 a.

As shown in fig. 10-11, the lever 1 further includes a partition wall disposed around the lever spring shaft 1-2-0, and the partition wall is located between the lever spring shaft 1-2-0 and the moving contact 7a, so as to increase the insulation gap and the creepage distance between the reset elastic member 2 and the moving contact 7 a.

As shown in fig. 1-9, one end of the push rod 3 is matched with the operating mechanism, the middle part of the push rod is rotatably arranged on the shell h, and the other end of the push rod is matched with the reset elastic piece 2.

In particular, as shown in fig. 1 to 9, the push rod 3 cooperates with the operating mechanism in the following way: the push rod 3 is in driving fit with the trip piece 4a of the operating mechanism to drive the trip piece 4a to rotate so as to release the snap fit with the trip piece 3a and trip the operating mechanism. Further, the operating mechanism further comprises a transmission rod 8a, the push rod 3 drives the jump fastener 4a to rotate through the transmission rod 8a, so that the jump fastener 4a releases the snap fit with the lock fastener 3a, and the operating mechanism is tripped. In this embodiment, one end of the transmission rod 8a is movably connected with the jump fastener 4a, the other end is matched with the push rod 3, a long strip-shaped sliding hole is arranged in the middle of the transmission rod 8a, and the transmission rod 8a is arranged on the shell h of the circuit breaker in a sliding fit manner through the long strip-shaped sliding hole and the transmission rod shaft. Preferably, the shift lever 1 is rotatably mounted on a transmission lever shaft of the housing h through the shift lever mounting portion 1-0, and shares a transmission lever shaft with the transmission lever 8a, and the transmission lever 8a is located above the shift lever 1. Further, a transmission rod connecting hole is formed in one end, movably connected with the jump fastener 4a, of the transmission rod 8a, a jump fastener connecting shaft is arranged on the jump fastener 4a, and the transmission rod connecting hole is sleeved on the jump fastener connecting shaft.

As shown in fig. 2 and 12, an embodiment of the push rod 3 is shown: the push rod 3 comprises a first push rod finger 3-1, a push rod installation part 3-2, a second push rod finger 3-3 and a push rod matching part 3-4 which are sequentially connected, the push rod 3 is rotatably arranged on the shell h through the push rod installation part 3-2, the first push rod finger 3-1 is matched with the operating mechanism, the second push rod finger 3-3 is matched with the push rod 4-0, and the push rod matching part 3-4 is matched with the reset elastic piece 2. Further, the push rod matching part 3-4 is provided with a matching part slot 3-4-0 matched with the spring second end 2-1 of the reset elastic piece 2.

Preferably, the push rod mounting part 3-2 is of a U-shaped structure and comprises a mounting bottom plate and two mounting arms which are oppositely arranged, the mounting bottom plate is respectively connected with the first push rod finger 3-1 and the second push rod finger 3-3, and the push rod mounting part 3-2 is rotatably arranged on the shell h through the mounting arms.

Preferably, as shown in FIGS. 1-9, the spring second end 2-1 is always positioned within the mating portion slot 3-4-0. Further, the matching part slot 3-4-0 is a long and narrow slot.

Preferably, the push rod 3 is an integral member formed by cutting and bending a metal plate; or an integral member made of plastic.

The operation process of the circuit breaker of the invention will be described with reference to the accompanying drawings:

as shown in fig. 7-9, after the breaker detects the leakage current, the magnetic flux release 4 acts to push out the push rod 4-0, the push rod 4-0 presses the push rod second finger 3-3 of the push rod 3 to drive the push rod 3 to rotate clockwise, the push rod 3 drives the trip element 4a of the operating mechanism to rotate through the transmission rod 8a so as to release the snap fit with the trip element 3a, the operating mechanism is tripped, and finally the breaker is tripped and opened. Referring to fig. 4-6, after the breaker is tripped and opened due to a leakage current fault (that is, the trip and opening are performed due to the action of the magnetic flux tripper 4), the moving contact 7a abuts against the deflector rod matching portion 1-2 of the deflector rod 1 to enable the deflector rod 1 to rotate anticlockwise, the deflector rod 1 drives the reset elastic member 2 to rotate anticlockwise, the spring second end 2-1 of the reset elastic member 2 is separated from the deflector rod third section 1-4 of the deflector rod 1 and abuts against the push rod matching portion 3-4 of the push rod 3, the spring second end 2-1 drives the push rod 3 to rotate anticlockwise through the push rod matching portion 3-4, and the push rod second finger 3-3 of the push rod 3 abuts against the push rod 4-0 to enable the push rod to reset; therefore, the restoring force applied to the push rod 3 by the restoring elastic member 2 is derived from the restoring force generated by the elastic deformation of the restoring elastic member 2. As shown in fig. 1-3, when the circuit breaker is in a closing state, the moving contact 7a is closed with the fixed contact and separated from the driving lever matching portion 1-2 of the driving lever 1, the spring second end 2-1 of the reset elastic member 2 is in contact with the driving lever third section 1-4 of the driving lever 1, so that the driving lever 1, the reset elastic member 2 and the push rod 3 are in a free rotation state (the "free rotation state" means that the three parts are not subjected to any external force causing rotation or rotation trend until the push rod 3 is subjected to the acting force from the push rod 4-0, and the three parts are not correspondingly rotated) so as to prepare for the next action of the magnetic flux tripper 4.

As shown in fig. 1, 4 and 7, a layout manner of the circuit breaker of the present invention is as follows: the magnetic flux release 4 and the reset mechanism are both positioned at one side below the operating mechanism and positioned between the arc inlet side of the arc extinguishing chamber and one wiring terminal of the circuit breaker; the deflector rod 1, the reset elastic piece 2 and the push rod 3 are all positioned on one side of the magnetic flux release 4, positioned between the arc extinguishing chamber and the magnetic flux release 4, and the deflector rod 1 and the magnetic flux release 4 are positioned on two sides of the push rod 3.

The rotation of operating device latch piece 3a one end is installed in the one side below of handle 2, latch piece 4a and lever 6a rotate and install in the opposite side of handle 2, and latch piece 3 a's the other end extends to the opposite side of handle 2 and latch piece 4a snap-fit from the below of handle 2, second connecting rod 5a basically level sets up in the below of handle 2, and second connecting rod 5a one end articulates and slides along waist type groove with first connecting rod 2a, and the other end is connected with lever 6 a. The trip element 4a is preferably mounted coaxially with the lever 6a and is stacked above the lever 6 a. One end of the locking piece 3a is rotatably installed, the other end is provided with a snap fastener part which is in snap fit with the snap fastener 4a, the waist-shaped groove is arranged between the rotation axis of the locking piece 3a and the snap fastener part, one end of the snap fastener 4a is rotatably installed, the other end is provided with a tripping driving part for triggering tripping, the side edge of the tripping element 4a, which faces the latching element 3a, is provided with a sliding surface which is in sliding fit with the tripping hasp part of the latching element 3a, and the sliding surface is provided with a convex hasp platform which is in snap fit with the tripping hasp part.

The transmission rod 8a is arranged above the lever 6a and the movable contact in a stacked manner, and the pull rod 1 is arranged between the lever 6a and the transmission rod 8a in a stacked manner. The transmission rod 8a is L-shaped and comprises a cross arm which is basically horizontally arranged and a vertical arm which is vertically arranged, a long-strip-shaped sliding hole is formed in the joint of the cross arm and the vertical arm, the cross arm is arranged above the lever 6a and the moving contact in a stacked mode, the end portion of the cross arm is connected with the jump fastener 4a, and the end portion of the vertical arm is matched with the push rod 3. One end of the deflector rod 1 is rotatably arranged on a transmission rod shaft of the shell h through a deflector rod mounting part 1-0, a strip-shaped sliding hole of the transmission rod 8a is sleeved on the transmission rod shaft, and the deflector rod is stacked above the deflector rod 1.

The reset structure of the through release is compact and reasonable in layout structure, and the gap layout among all mechanisms of the circuit breaker is convenient to use.

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

Claims

1. The utility model provides a magnetic flux release reset structure, includes magnetic flux release (4) and canceling release mechanical system, its characterized in that: the reset mechanism comprises a deflector rod (1), a reset elastic piece (2) and a push rod (3), wherein the deflector rod (1) and the push rod (3) are respectively pivoted;

the push rod (3) is respectively matched with an operating mechanism of the circuit breaker and the magnetic flux release (4), when the magnetic flux release (4) acts, the push rod (4-0) of the magnetic flux release (4) drives the push rod (3) to rotate, and the operating mechanism is driven to release through the push rod (3);

after the breaker is tripped and opened, an operating mechanism or a moving contact (7 a) of the breaker moves to drive a deflector rod (1) to rotate, and the deflector rod (1) applies acting force to a push rod (3) through a reset elastic piece (2) to enable the push rod (3) to rotate in a direction of resetting a push rod (4-0);

after the breaker is switched on, the moving contact (7 a) is separated from the deflector rod (1).

2. The magnetic flux trip reset structure of claim 1, wherein: the acting force applied by the reset elastic piece (2) to the push rod (3) is 110% -130% of the reset force for resetting the push rod (4-0).

3. The magnetic flux trip reset structure of claim 1, wherein: the reset elastic piece (2) is arranged on the deflector rod (1).

4. The magnetic flux trip reset structure of claim 3, wherein: the reset elastic piece (2) is a torsion spring and comprises a torsion spring first end (2-0) and a torsion spring second end (2-1); the driving lever (1) comprises a driving lever spring shaft (1-2-0), the torsion spring is sleeved on the driving lever spring shaft (1-2-0), the first end (2-0) of the torsion spring is matched with the driving lever (1), and the second end (2-1) of the torsion spring is matched with the push rod (3).

5. The magnetic flux trip reset structure of claim 1, wherein: the driving lever (1) further comprises a driving lever matching part (1-2) matched with the moving contact (7 a), and the driving lever matching part (1-2) protrudes towards the direction of the moving contact (7 a).

6. The magnetic flux trip reset structure of claim 4, wherein: the driving lever (1) comprises a driving lever installation part (1-0), a driving lever first section (1-1), a driving lever matching part (1-2), a driving lever second section (1-3), a driving lever third section (1-4) and a driving lever limiting part (1-5) which are sequentially connected, the driving lever (1) is rotatably installed on a shell (h) of the circuit breaker through the driving lever installation part (1-0), a driving lever spring shaft (1-2-0) is arranged on one side of the driving lever matching part (1-2), a torsion spring first end (2-0) is matched with the driving lever first section (1-1), and a torsion spring second end (2-1) is limited between the driving lever second section (1-3) and the driving lever limiting part (1-5) and is opposite to the driving lever third section (1-4).

7. The magnetic flux trip reset structure of claim 1, wherein: one end of the push rod (3) is matched with the operating mechanism, the middle part of the push rod is rotatably arranged on the shell (h) of the circuit breaker, and the other end of the push rod is matched with the reset elastic piece (2).

8. The magnetic flux trip reset structure of claim 7, wherein: the push rod (3) comprises a first push rod finger (3-1), a push rod installation part (3-2), a second push rod finger (3-3) and a push rod matching part (3-4) which are sequentially connected, the push rod (3) is rotatably arranged on the shell (h) through the push rod installation part (3-2), the first push rod finger (3-1) is matched with the operating mechanism, the second push rod finger (3-3) is matched with the push rod (4-0), and the push rod matching part (3-4) is matched with the reset elastic piece (2).

9. The magnetic flux trip reset structure of claim 8, wherein: the reset elastic piece (2) is a torsion spring, and the push rod matching part (3-4) is provided with a matching part slot (3-4-0) matched with one end of the torsion spring;

the operating mechanism comprises a locking piece (3 a) and a jump piece (4 a) which are respectively arranged in a rotating way, and the locking piece (3 a) is in snap fit with the jump piece (4 a); the push rod (3) is in driving fit with the jump fastener (4 a) to drive the jump fastener (4 a) to rotate, so that the jump fastener (4 a) is released from being in snap fit with the lock fastener (3 a), and the operating mechanism is tripped;

the operating mechanism further comprises a transmission rod (8), and the push rod (3) drives the jump fastener (4 a) to rotate through the transmission rod (8), so that the jump fastener (4 a) is released from being in snap fit with the lock fastener (3 a);

one end of the transmission rod (8) is movably connected with the jump fastener (4 a), the other end of the transmission rod is matched with the push rod (3), a strip-shaped sliding hole is formed in the middle of the transmission rod (8), and the transmission rod (8) is arranged on a shell (h) of the circuit breaker in a sliding fit manner through the strip-shaped sliding hole and the transmission rod shaft;

the operating mechanism further comprises a handle (1 a), a first connecting rod (2 a) and a second connecting rod (5 a), one end of the first connecting rod (2 a) is rotationally connected with the handle (1 a), the other end of the first connecting rod passes through one end of the second connecting rod (5 a) and then is inserted into a waist-shaped groove on the locking piece (3 a) in a sliding mode, the other end of the second connecting rod (5 a) is connected with the lever (6 a) in a driving mode to drive the lever (6 a) to rotate, the lever (6 a) is connected with the moving contact (7 a) in a driving mode, and the lever reset elastic piece (7 a) is connected with the lever (6 a).

10. A circuit breaker characterized in that it comprises a magnetic flux trip reset structure according to any one of claims 1-9;

the reset mechanism of the magnetic flux release reset structure and the magnetic flux release ((4)) are both positioned on one side below the operating mechanism and between the arc inlet side of the arc extinguishing chamber and one wiring terminal of the circuit breaker, the deflector rod (1), the reset elastic piece (2) and the push rod (3) are both positioned on one side of the magnetic flux release (4), between the arc extinguishing chamber and the magnetic flux release (4), and the deflector rod (1) and the magnetic flux release (4) are positioned on two sides of the push rod (3).