CN220233067U - Tripping mechanism and circuit breaker - Google Patents

Abstract

The disclosure discloses a tripping mechanism and a circuit breaker, and belongs to the field of electronic devices. The tripping mechanism is applied to the circuit breaker and comprises a leakage driving assembly, a tripping element, a connecting arm and a reset rod; the electric leakage driving assembly comprises a push rod which can move; the trip piece and the connecting arm can rotate, the rotation axes of the trip piece and the connecting arm are parallel to each other, the trip piece is positioned between the electric leakage driving assembly and the connecting arm, the matching part of the trip piece is contacted with the ejector rod, the first locking part of the connecting arm is matched with the second locking part of the trip piece, and the connecting arm is used for rotating to trigger the operating mechanism of the circuit breaker when the ejector rod drives the trip piece to unlock with the connecting arm; two ends of the reset rod are respectively connected with the operating mechanism and the connecting arm; the tripping mechanism is configured to reset the connecting arm under the drive of the operating mechanism when the connecting arm rotates to trigger the operating mechanism so that the circuit breaker is switched from a closing state to a separating state. The present disclosure enables the trip mechanism to be automatically reset.

Description

Tripping mechanism and circuit breaker

Technical Field

The disclosure belongs to the field of electronic devices, and in particular relates to a tripping mechanism and a circuit breaker.

Background

A circuit breaker is a circuit protection device generally used for switching off and on a load circuit and switching off a fault circuit, and realizes breaking control of the circuit through an operating mechanism.

In the related art, a trip mechanism is provided in a circuit breaker. When the circuit where the circuit breaker is located has the problem of electric leakage, the tripping mechanism can act to trigger the operating mechanism, so that the circuit breaker is switched from a closing state to a separating state, and the circuit breaker plays a role in protecting the circuit.

However, after the trip mechanism is operated, the trip mechanism needs to be manually reset, so that the operation of the circuit breaker is complicated.

Disclosure of Invention

The embodiment of the disclosure provides a tripping mechanism and a circuit breaker, which can enable the tripping mechanism to be reset automatically. The technical scheme is as follows:

in a first aspect, embodiments of the present disclosure provide a trip mechanism for a circuit breaker, the trip mechanism including a leakage driving assembly, a trip member, a link arm, and a reset lever;

the electric leakage driving assembly comprises a push rod, and the push rod can move along the axis of the push rod;

the tripping part and the connecting arm can rotate, the rotation axes of the tripping part and the connecting arm are parallel to each other, the tripping part is positioned between the electric leakage driving assembly and the connecting arm, the matching part of the tripping part is contacted with the ejector rod, the first locking part of the connecting arm is matched with the second locking part of the tripping part, and the connecting arm is used for rotating and triggering the operating mechanism of the circuit breaker when the ejector rod drives the tripping part to unlock with the connecting arm;

one end of the reset rod is connected with the operating mechanism, and the other end of the reset rod is connected with the connecting arm;

the tripping mechanism is configured to reset the connecting arm under the drive of the operating mechanism when the connecting arm rotates to trigger the operating mechanism so that the circuit breaker is switched from a closing state to a separating state.

In one implementation of the present disclosure, the reset lever includes a first mating segment, a connecting segment, and a second mating segment that are sequentially connected;

the first matching section and the second matching section are positioned on the same side of the connecting section and are perpendicular to the connecting section;

the first matching section is connected with the operating mechanism, and the second matching section is connected with the connecting arm.

In another implementation of the present disclosure, the first end of the connecting arm has a limiting slot;

the extending direction of the limiting groove is perpendicular to the rotation axis of the connecting arm, the first end of the limiting groove is close to the first matching section of the reset rod, and the second end of the limiting groove is close to the tripping piece;

when the circuit breaker is in a switching-off state, the second matching section is propped against the second end of the limiting groove, and when the circuit breaker is in a switching-on state, the second matching section is close to the first end of the limiting groove.

In yet another implementation of the present disclosure, one side of the connecting arm has a latch slot;

the locking groove is close to the first end of the connecting arm, an opening of the locking groove faces the tripping piece, and the groove bottom profile of the locking groove is matched with the rotating track of the second locking part;

the first locking part is positioned at the notch of the locking groove.

In yet another implementation of the present disclosure, the second end of the link arm has a first rotating ring;

the first rotating ring is coaxial with the rotating axis of the connecting arm.

In yet another implementation of the present disclosure, the trip mechanism further includes a first resilient member;

the first elastic piece is sleeved on the first rotating ring and is used for driving the connecting arm to rotate to trigger the operating mechanism.

In yet another implementation of the present disclosure, the trip member has a second rotating ring;

the second rotating ring is positioned between the second locking part and the matching part, and the second rotating ring is coaxial with the rotating axis of the tripping piece.

In yet another implementation of the present disclosure, the trip mechanism further includes a second resilient member;

the second elastic piece is sleeved on the second rotating ring and is used for driving the tripping piece to lock the connecting arm.

In yet another implementation of the present disclosure, the leakage drive assembly includes a transformer and an electromagnetic trip;

the live wire cable and the zero wire cable of the circuit breaker are inserted in the transformer;

the electromagnetic release is electrically connected with the mutual inductor, and the armature of the electromagnetic release is connected with the ejector rod.

In a second aspect, embodiments of the present disclosure provide a circuit breaker including a housing, an operating mechanism, and a trip mechanism;

the operating mechanism is at least partially positioned outside the shell and can rotate relative to the shell, and the operating mechanism is used for switching the circuit breaker between a closing state and a separating state;

the tripping mechanism is positioned in the shell, and the tripping mechanism is the tripping mechanism in the first aspect.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

the tripping mechanism is arranged in the circuit breaker and can perform tripping and opening operation when electric leakage occurs in the circuit. In the tripping mechanism, the electric leakage driving assembly can detect electric leakage of the circuit breaker in a closing state, and when the electric leakage occurs, the ejector rod is driven to move along the axis of the circuit breaker. In the process of the movement of the ejector rod, the ejector rod drives the tripping piece to rotate, so that unlocking is realized between the tripping piece and the connecting arm. The unlocked connecting arm rotates and triggers the operation mechanism of the circuit breaker to act, so that the circuit breaker is switched from a closing state to a separating state. When the circuit breaker is switched from a closing state to a breaking state, an operating mechanism of the circuit breaker can act, and at the moment, the connecting arm is reset by the reset rod under the drive of the operating mechanism so as to be locked together with the tripping piece again, so that the tripping breaking action is carried out again when the next leakage occurs.

That is, the trip mechanism provided by the embodiment of the disclosure can realize transmission between the operating mechanism and the connecting arm through the reset rod, so that the operating mechanism synchronously resets the connecting arm through the reset rod when switching the circuit breaker to the opening state, and manual reset is not needed, thereby effectively simplifying the operation of the circuit breaker.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural view of a circuit breaker provided by an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a breaking state of a circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a closing state of a circuit breaker provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a trip mechanism provided by an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a trip state of a trip mechanism provided by an embodiment of the present disclosure;

fig. 6 is a schematic view of a trigger state of a trip mechanism provided by an embodiment of the present disclosure;

FIG. 7 is a schematic view of a reset lever provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a link arm provided by an embodiment of the present disclosure;

fig. 9 is a schematic structural view of a release member according to an embodiment of the present disclosure.

The symbols in the drawings are as follows:

10. a leakage driving assembly;

110. a push rod; 120. a transformer; 130. an electromagnetic release;

20. removing the fastener;

210. a second locking part; 220. a mating portion; 230. a second rotating ring; 240. a second elastic member;

30. a connecting arm;

310. a first locking part; 320. a limit groove; 330. a latch groove; 340. a first rotating ring; 350. a first elastic member;

40. a reset lever;

410. a first mating segment; 420. a connection section; 430. a second mating section;

100. an operating mechanism;

1100. a handle; 1200. locking; 1300. a moving contact; 1400. a main spring;

200. a housing;

2100. a first rotating shaft; 2200. a second rotating shaft;

300. a trip mechanism;

400. and (5) a static contact.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

The embodiment of the disclosure provides a circuit breaker, fig. 1 is a schematic structural diagram of the circuit breaker, and referring to fig. 1, the circuit breaker is an earth leakage circuit breaker (RCBO), and the basic function of the circuit breaker is expanded with an earth leakage protection function. The circuit breaker provided by the embodiment of the disclosure is a double-in and double-out circuit breaker, and the width of the circuit breaker is 18mm, namely, only 1 space is occupied in a distribution box.

In this embodiment, the circuit breaker includes a housing 200, an operating mechanism 100, and a trip mechanism 300. The operating mechanism 100 is at least partially located outside the housing 200 and can rotate relative to the housing 200, the operating mechanism 100 is used for switching the circuit breaker between a closing state and a breaking state, and the tripping mechanism 300 is located inside the housing 200 and is used for driving the operating mechanism 100 to act when electric leakage occurs in a circuit so as to switch the circuit breaker from the closing state to the breaking state.

In this embodiment, the operating mechanism 100 mainly includes a handle 1100, a latch 1200, a moving contact 1300, and a main spring 1400, where the handle 1100, the latch 1200, and the moving contact 1300 are sequentially connected in a transmission manner.

Fig. 2 is a schematic diagram of a breaking state of the circuit breaker, and fig. 3 is a schematic diagram of a closing state of the circuit breaker. The normal operation of the circuit breaker will be briefly described with reference to fig. 2 and 3.

In the open state, the moving contact 1300 is always spaced from the fixed contact 400 by the main spring 1400 (see fig. 2). When switching to the closing state, the operator dials the handle 1100, so that the handle 1100 drives the lock catch 1200 to rotate, so as to drive the moving contact 1300 to rotate against the elastic force of the main spring 1400, and finally, the moving contact 1300 and the fixed contact 400 are contacted (see fig. 3). Also, the contact between the moving contact 1300 and the fixed contact 400 can be maintained by the latch 1200. When switching to the opening state, the operator reversely dials the handle 1100, so that the handle 1100 drives the lock catch 1200 to rotate, the lock catch 1200 releases the lock of the moving contact 1300, and the moving contact 1300 is separated from the fixed contact 400 under the drive of the main spring 1400 (see fig. 2).

If the circuit breaker is in a closing state, the trip mechanism 300 drives the operating mechanism 100 to act, that is, drives the lock catch 1200 to rotate, so that the lock catch 1200 releases the locking of the moving contact 1300, and the circuit breaker is switched from the closing state to the opening state.

In order to enable the trip mechanism to automatically reset after the circuit breaker is switched from the closed state to the open state, the disclosed embodiment provides a trip mechanism 300, fig. 4 is a schematic structural diagram of the trip mechanism, and in combination with fig. 4, in this embodiment, the trip mechanism 300 includes the leakage driving assembly 10, the trip member 20, the link arm 30 and the reset lever 40.

The leakage driving assembly 10 includes a jack 110, and the jack 110 is capable of moving along its own axis. The trip piece 20 and the link arm 30 can both rotate, the rotation axes of the trip piece 20 and the link arm 30 are parallel to each other, the trip piece 20 is located between the leakage driving assembly 10 and the link arm 30, the matching portion 220 of the trip piece 20 contacts with the ejector rod 110, the first locking portion 310 of the link arm 30 is matched with the second locking portion 210 of the trip piece 20, and the link arm 30 is used for rotating to trigger the operating mechanism 100 of the circuit breaker when the ejector rod 110 drives the trip piece 20 to unlock with the link arm 30. One end of the reset lever 40 is connected to the operating mechanism 100, and the other end of the reset lever 40 is connected to the link arm 30.

The trip mechanism is configured such that when the link arm 30 rotates to trigger the operating mechanism 100 to switch the circuit breaker from the on state to the off state, the reset lever 40 resets the link arm 30 under the drive of the operating mechanism 100.

Fig. 5 is a schematic diagram of a trip state of the trip mechanism, and fig. 6 is a schematic diagram of a trigger state of the trip mechanism. The operation of the trip mechanism will be briefly described with reference to fig. 5 and 6.

The tripping mechanism is arranged in the circuit breaker and can perform tripping and opening operation when electric leakage occurs in the circuit. In the trip mechanism, the leakage driving assembly 10 is capable of detecting leakage of the circuit breaker in a closing state (see fig. 3), and driving the jack 110 to move along its own axis when leakage occurs. During the movement of the ejector 110, the ejector 110 drives the trip member 20 to rotate, so that the trip member 20 and the link arm 30 are unlocked (see fig. 5). The unlocked link arm 30 rotates and triggers the operation mechanism 100 of the circuit breaker to act (see fig. 6), so that the circuit breaker is switched from the closed state to the open state (see fig. 2). When the circuit breaker is switched from the closing state to the opening state, the operating mechanism 100 of the circuit breaker acts, and at this time, the reset lever 40 resets the connecting arm 30 under the driving of the operating mechanism 100 so as to lock the connecting arm with the trip member 20 again, so that the trip opening action is performed again when the next leakage occurs.

That is, the trip mechanism provided in the embodiments of the present disclosure can realize the transmission between the operating mechanism 100 and the connecting arm 30 through the reset lever 40, so that the operating mechanism 100 can synchronously reset the connecting arm 30 through the reset lever 40 while switching the circuit breaker to the opening state, and the operation of the circuit breaker is effectively simplified without further manual reset.

With continued reference to fig. 4, in this embodiment, the leakage drive assembly 10 includes a transformer 120 and an electromagnetic trip 130. The transformer 120 is inserted with a live wire cable and a zero wire cable of the circuit breaker, the electromagnetic release 130 is electrically connected with the transformer 120, and an armature of the electromagnetic release 130 is connected with the ejector rod 110.

In normal operation, the currents in the live and neutral cables are the same in magnitude and opposite in direction, and no output is provided by the transformer 120. When the circuit is in electric leakage, the current in the live wire cable and the current in the zero wire cable are different, the mutual inductor 120 senses that the current is out of balance, the mutual inductor 120 generates corresponding induced potential, and after compensation is performed through the capacitance of the circuit board, signals are generated and sent to the electromagnetic release 130. The coil of the electromagnetic release 130 generates current to generate alternating magnetic flux, and when the electromagnetic force generated by the coil is greater than the reaction force of the internal spring, the ejector rod 110 is ejected out to drive the release member 20 to rotate, that is, the release mechanism performs the release and brake opening operation.

Fig. 7 is a schematic structural view of the reset lever 40, and referring to fig. 7, in this embodiment, the reset lever 40 includes a first mating segment 410, a connecting segment 420, and a second mating segment 430 that are sequentially connected. The first mating segment 410 and the second mating segment 430 are located on the same side of the connecting segment 420 and are both perpendicular to the connecting segment 420. The first mating segment 410 is coupled to the operating mechanism 100 and the second mating segment 430 is coupled to the arm 30.

In the above implementation, the connecting section 420 is a main body of the reset lever 40 and can serve to connect the first mating section 410 and the second mating section 430. Since the first mating segment 410 and the second mating segment 430 are located on the same side of the connecting segment 420, the space of the circuit breaker in the width can be effectively saved, which is beneficial to the light and thin design of the circuit breaker. Since the first mating segment 410 and the second mating segment 430 are perpendicular to the connecting segment 420, the first mating segment 410 can better transmit the force at the operating mechanism 100, and the second mating segment 430 can better transmit the force at the connecting arm 30.

Illustratively, the first mating segment 410 is coupled to the moving contact 1300. When the circuit breaker is switched from a closing state to a separating state, the moving contact 1300 directly receives the acting force exerted by the main spring 1400, so that the first matching section 410 is connected with the moving contact 1300, the reset rod 40 can receive enough acting force, the acting force drop caused by excessive transmission links is avoided, and the reliability of the reset rod 40 is effectively improved.

In some examples, first mating segment 410, connecting segment 420, and second mating segment 430 are integral structures that can effectively ensure the structural integrity of reset lever 40 and improve the manufacturing efficiency of reset lever 40.

Since there is a linkage between the operating mechanism 100 and the link arm 30 through the reset lever 40, it is necessary to avoid the link arm 30 interfering with the normal closing and opening of the operating mechanism 100. Fig. 8 is a schematic structural diagram of the connecting arm 30, and in this embodiment, the first end of the connecting arm 30 has a limiting slot 320, referring to fig. 8. The extending direction of the limiting groove 320 is perpendicular to the rotation axis of the connecting arm 30, the first end of the limiting groove 320 is close to the first matching section 410 of the reset lever 40, and the second end of the limiting groove 320 is close to the disengaging piece 20. When the circuit breaker is in a switching-off state, the second matching section 430 abuts against the second end of the limiting groove 320, and when the circuit breaker is in a switching-on state, the second matching section 430 is close to the first end of the limiting groove 320.

In the above implementation, when no leakage occurs, the trip mechanism does not operate. In this case, even if the reset lever 40 moves under the driving of the operating mechanism 100, the second engaging section 430 of the reset lever 40 can slide freely in the limiting groove 320 without interfering with the link arm 30 (see fig. 2 and 3). When the circuit breaker is switched to the off state due to the leakage, the second end of the limiting slot 320 is close to the second mating segment 430 due to the rotation of the connecting arm 30, and at the same time, the moving contact 1300 of the operating mechanism 100 drives the second mating segment 430 of the reset lever 40 to abut against the second end of the limiting slot 320, and drives the connecting arm 30 to reset (this process is sequentially shown in fig. 6 and 2).

Since the link arm 30 and the trip member 20 rotate relatively, the shortest distance between the link arm 30 and the trip member 20 will change along with the rotation, in order to avoid interference between the link arm 30 and the trip member 20 during rotation, in this embodiment, one side of the link arm 30 has a latch slot 330, the latch slot 330 is close to the first end of the link arm 30, the opening of the latch slot 330 faces the trip member 20, the bottom profile of the latch slot 330 matches with the rotation track of the second latch portion 210, and the first latch portion 310 is located at the notch of the latch slot 330.

In the above implementation manner, since the groove bottom profile of the latch groove 330 matches the rotation track of the second latch portion 210, when the second latch portion 210 rotates relative to the link arm 30 and rotates into the latch groove 330, the second latch portion 210 can rotate along the groove bottom of the latch groove 330, so that interference between the second latch portion 210 and the link arm 30 is avoided. In addition, the first locking portion 310 is disposed at the notch of the locking groove 330, so that the second locking portion 210 can be locked with each other.

With continued reference to fig. 8, in this embodiment, the second end of the link arm 30 has a first rotation ring 340, the first rotation ring 340 being coaxial with the rotation axis of the link arm 30.

In the above-described implementation, the inner wall of the housing 200 of the circuit breaker has the first rotation shaft 2100, and the first rotation ring 340 is rotatably sleeved on the first rotation shaft 2100, so as to implement the rotation of the link arm 30 relative to the housing 200.

The first rotating ring 340 and the connecting arm 30 are integrated into a single structural member, which can effectively improve the structural integrity between the first rotating ring 340 and the connecting arm 30, and is beneficial to improving the manufacturing efficiency of the first rotating ring 340 and the connecting arm 30.

Referring to fig. 4 again, in the present embodiment, the trip mechanism further includes a first elastic member 350, the first elastic member 350 is sleeved on the first rotating ring 340, and the first elastic member 350 is used for driving the link arm 30 to rotate to trigger the operating mechanism 100.

Illustratively, the first elastic member 350 is a torsion spring, one end of the first elastic member 350 is positioned on the inner wall of the housing 200, and the other end of the first elastic member 350 is positioned on the first rotating ring 340. When the connecting arm 30 and the trip member 20 are locked to each other, the first elastic member 350 always applies a force to the connecting arm 30 that rotates the first locking portion 310 away from the trip member 20, i.e., toward the operating mechanism 100. After the link arm 30 and the trip member 20 are unlocked, the first elastic member 350 drives the link arm 30 to rotate toward the operating mechanism 100, and triggers the lock catch 1200 of the operating mechanism 100.

Fig. 9 is a schematic structural view of the trip member 20, and in conjunction with fig. 9, in this embodiment, the trip member 20 has a second rotating ring 230. The second rotating ring 230 is located between the second locking portion 210 and the mating portion 220, and the second rotating ring 230 is coaxial with the rotation axis of the trip member 20.

In the above-described embodiment, the inner wall of the housing 200 of the circuit breaker has the second rotating shaft 2200, and the second rotating ring 230 is rotatably sleeved on the second rotating shaft 2200, so that the rotation of the trip member 20 relative to the housing 200 is achieved.

The second rotating ring 230 and the trip member 20 are integrated, which can effectively improve the structural integrity between the second rotating ring 230 and the trip member 20, and is beneficial to improving the manufacturing efficiency of the second rotating ring 230 and the trip member 20.

The engaging portion 220 is a plate-shaped structural member, and can effectively increase the contact area between the engaging portion 220 and the ejector 110, so that the ejector 110 can stably drive the engaging portion 220.

Referring again to fig. 4, in this embodiment, the trip mechanism further includes a second resilient member 240. The second elastic member 240 is sleeved on the second rotating ring 230, and the second elastic member 240 is used for driving the locking arm 30 of the locking member 20.

The second elastic member 240 is a torsion spring, and one end of the second elastic member 240 is positioned at an end of the second rotation shaft 2100 and the other end of the second elastic member 240 is positioned on the second rotation ring 230. When the ejector 110 drives the trip member 20 to rotate to unlock between the trip member 20 and the link arm 30, the second elastic member 240 always applies a force to the trip member 20 to drive the second locking portion 210 to rotate toward the link arm 30, that is, drive the engaging portion 220 to rotate toward the ejector 110. After the coil of the electromagnetic release 130 is de-energized, the ejector 110 retracts, and the second elastic member 240 drives the second locking portion 210 to rotate toward the connecting arm 30, so that the second locking portion 210 and the first locking portion 310 are locked again.

The following describes the procedure of the trip mechanism for performing the trip opening operation in the order of fig. 3, 5, 6, and 2.

When the circuit is in electric leakage, the current in the live wire cable and the current in the zero wire cable are different, the mutual inductor 120 senses that the current is out of balance, the mutual inductor 120 generates corresponding induced potential, and after compensation is performed through the capacitance of the circuit board, signals are generated and sent to the electromagnetic release 130. The coil of the electromagnetic release 130 generates current to generate alternating magnetic flux, and when the electromagnetic force generated by the coil is greater than the internal spring reaction force, the ejector 110 is ejected to drive the release member 20 to rotate. Along with the rotation of the trip member 20, the second latch portion 210 and the first latch portion 310 are unlocked, and the connecting arm 30 rotates under the driving of the first elastic member 350 to trigger the latch 1200 of the operating mechanism 100, so that the latch 1200 releases the locking of the moving contact 1300, the moving contact 1300 rotates under the driving of the main spring 1400 and is separated from the fixed contact 400, and the circuit breaker is switched from the closing state to the opening state. The reset lever 40 is driven to move while the movable contact 1300 rotates. The reset lever 40 pushes the link arm 30 to rotate against the elastic force of the first elastic member 350, so that the link arm 30 is reset. After the circuit breaker is in the open state, no current exists in the live cable and the neutral cable, the ejector 110 is retracted, and the trip member 20 is reset under the driving of the second elastic member 240, so that the second locking portion 210 and the first locking portion 310 are locked again.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims (10)

1. A tripping mechanism applied to a circuit breaker, which is characterized by comprising an electric leakage driving assembly (10), a tripping piece (20), a connecting arm (30) and a reset rod (40);

the electric leakage driving assembly (10) comprises a push rod (110), and the push rod (110) can move along the axis of the push rod;

the tripping element (20) and the connecting arm (30) can rotate, the rotation axes of the tripping element (20) and the connecting arm (30) are parallel to each other, the tripping element (20) is positioned between the electric leakage driving assembly (10) and the connecting arm (30), the matching part (220) of the tripping element (20) is contacted with the ejector rod (110), the first locking part (310) of the connecting arm (30) is matched with the second locking part (210) of the tripping element (20), and the connecting arm (30) is used for triggering the operating mechanism (100) of the circuit breaker in a rotating way when the ejector rod (110) drives the tripping element (20) to be unlocked with the connecting arm (30);

one end of the reset rod (40) is connected with the operating mechanism (100), and the other end of the reset rod (40) is connected with the connecting arm (30);

the tripping mechanism is configured such that when the connecting arm (30) rotates to trigger the operating mechanism (100) so as to switch the circuit breaker from a closing state to a separating state, the reset rod (40) resets the connecting arm (30) under the drive of the operating mechanism (100).

2. The trip mechanism of claim 1, wherein said reset lever (40) includes a first mating segment (410), a connecting segment (420), and a second mating segment (430) connected in sequence;

the first mating section (410) and the second mating section (430) are located on the same side of the connecting section (420) and are both perpendicular to the connecting section (420);

the first mating segment (410) is connected to the operating mechanism (100), and the second mating segment (430) is connected to the connecting arm (30).

3. The trip mechanism of claim 2 wherein the first end of the link arm (30) has a limit slot (320);

the extending direction of the limiting groove (320) is perpendicular to the rotation axis of the connecting arm (30), the first end of the limiting groove (320) is close to the first matching section (410) of the reset rod (40), and the second end of the limiting groove (320) is close to the tripping piece (20);

when the circuit breaker is in a switching-off state, the second matching section (430) is propped against the second end of the limiting groove (320), and when the circuit breaker is in a switching-on state, the second matching section (430) is close to the first end of the limiting groove (320).

4. A trip mechanism according to claim 3, characterized in that one side of the link arm (30) has a catch slot (330);

the locking groove (330) is close to the first end of the connecting arm (30), an opening of the locking groove (330) faces the tripping piece (20), and the groove bottom outline of the locking groove (330) is matched with the rotation track of the second locking part (210);

the first locking portion (310) is located at a notch of the locking groove (330).

5. A trip mechanism according to claim 3, characterized in that the second end of the link arm (30) has a first rotation ring (340);

the first rotating ring (340) is coaxial with the rotation axis of the connecting arm (30).

6. The trip mechanism of claim 5, further comprising a first resilient member (350);

the first elastic piece (350) is sleeved on the first rotating ring (340), and the first elastic piece (350) is used for driving the connecting arm (30) to rotate so as to trigger the operating mechanism (100).

7. The trip mechanism of any one of claims 1-5 wherein said trip member (20) has a second rotating ring (230);

the second rotating ring (230) is located between the second locking portion (210) and the matching portion (220), and the second rotating ring (230) is coaxial with the rotating axis of the tripping piece (20).

8. The trip mechanism of claim 7, further comprising a second resilient member (240);

the second elastic piece (240) is sleeved on the second rotating ring (230), and the second elastic piece (240) is used for driving the tripping piece (20) to lock the connecting arm (30).

9. The trip mechanism of any one of claims 1-5, wherein said leakage drive assembly (10) includes a transformer (120) and an electromagnetic trip unit (130);

a live wire cable and a zero wire cable of the circuit breaker are inserted in the transformer (120);

the electromagnetic release (130) is electrically connected with the mutual inductor (120), and an armature of the electromagnetic release (130) is connected with the ejector rod (110).

10. A circuit breaker characterized by comprising a housing (200), an operating mechanism (100) and a trip mechanism (300);

the operating mechanism (100) is at least partially positioned outside the shell (200) and can rotate relative to the shell (200), and the operating mechanism (100) is used for switching the circuit breaker between a closing state and a separating state;

the trip mechanism (300) is located within the housing (200), the trip mechanism (300) being the trip mechanism (300) of any one of claims 1-9.