CN117672774A - Electromagnetic type switching-on and switching-off mechanism and circuit breaker - Google Patents

Abstract

The invention discloses an electromagnetic opening and closing mechanism and a circuit breaker, wherein the electromagnetic opening and closing mechanism comprises a shell, an electromagnet arranged in the shell, a handle transmission rod which is in butt joint with the output end of the electromagnet, limiting pieces and linkage traction rods which are symmetrically arranged at two sides of the handle transmission rod, a limiting spring arranged on the limiting pieces, a pull rod movably connected with the electromagnet, an isolation blocking rib arranged on the shell, a linkage rod which is integrally formed with the shell and is rotatably connected with the shell, and a circuit board arranged in the shell; the handle transmission rod is arranged on the shell, the limiting piece extends towards the inside of the shell, and the linkage traction rod extends towards the direction away from the shell; the pull rod is of a U-shaped structure, and one end of the pull rod is rotationally connected with the electromagnet; one end of the limiting spring is fixed with the shell; the device can complete the switching-on and switching-off operation of the circuit breaker by only one mechanism, thereby reducing the amount of parts required by the device and further reducing the occupied space of the device.

Description

Electromagnetic type switching-on and switching-off mechanism and circuit breaker

Technical Field

The invention relates to an electromagnetic opening and closing mechanism, in particular to an electromagnetic opening and closing mechanism and a circuit breaker, and relates to the technical field of electromagnetic switches.

Background

For a novel power distribution system, the regulation and control management needs to have the functions of remote control switching on/off or automatic switching on/off for the various piezoelectric devices so as to realize the functions of load regulation and control, energy switching, fault isolation, self-healing and the like.

The miniature circuit breaker with automatic control function in the market at present is realized by driving a multistage gear through a small motor and then driving a handle through the gear. The motor type opening and closing mechanism has a plurality of transmission joints and a plurality of parts, so that the mechanism has slow response and a plurality of parts;

the automatic control function of the miniature circuit breaker with the automatic control function is realized by two sets of mechanisms, namely a set of switching-on mechanism and a set of switching-off mechanism, so that the miniature circuit breaker is large in occupied space due to more mechanism parts.

Therefore, how to complete the automatic opening and closing of the circuit breaker is a problem to be solved at present.

Disclosure of Invention

The invention aims to: an electromagnetic opening and closing mechanism and a circuit breaker are provided to solve the problems existing in the prior art.

The technical scheme is as follows: an electromagnetic opening and closing mechanism and a circuit breaker, comprising:

the device comprises a shell, an electromagnet arranged in the shell, a handle transmission rod, limit pieces and linkage traction rods, limit springs, a pull rod, an isolation blocking rib, a linkage rod and a circuit board, wherein the handle transmission rod is in butt joint with the output end of the electromagnet;

the handle transmission rod is arranged on the shell, the limiting piece extends towards the inside of the shell, and the linkage traction rod extends towards the direction away from the shell;

wherein the pull rod is of a U-shaped structure, one end of the pull rod is rotationally connected with the electromagnet, and the other free end of the pull rod is suspended;

one end of the limiting spring is fixed with the shell;

at least in the working process, the electromagnet drives the pull rod to move on different sides of the isolation blocking rib, so that the switching-on and switching-off work is completed.

In a further embodiment, a guide rib with a preset radian, a positioning rib connected with one end of the guide rib and a limiting rib connected with the positioning rib are further arranged in the shell;

the guide rib, the positioning rib and the limiting rib extend a preset distance in a direction away from the shell, wherein the extending distance of the guide rib and the positioning rib is larger than the extending distance of the limiting rib, and the positioning rib and the limiting rib are parallel to the side face of the isolation blocking rib;

a preset first gap is reserved between the positioning rib, the limiting rib and the isolation blocking rib, a preset second gap is reserved between the guide rib and one end of the isolation blocking rib, and the first gap is communicated with the second gap and serves as a movable channel of the pull rod;

through making the pull rod move in the movable channel, make the pull rod can be from the isolation fender muscle side that is close to the gangbar through the movable channel and move to the isolation fender muscle side that is close to the electro-magnet, and then make the pull rod can keep apart and keep off and change each other between the muscle both sides face, accomplish the divide-shut brake work.

In a further embodiment, the limiting spring comprises a first elastic piece, a second elastic piece connected with one end of the first elastic piece, a third elastic piece connected with one end of the second elastic piece, and a fourth elastic piece connected with the third elastic piece, wherein the first elastic piece is sleeved on the limiting piece;

the other end of the first elastic piece is fixed on the shell;

the free end of the fourth elastic piece extends in a direction away from the electromagnet;

the third elastic piece is of a U-shaped structure, the pull rod is located in a U-shaped area surrounded by the third elastic piece in the opening and closing process, the limiting spring is pushed to deform the pull rod, the elastic force generated by the limiting spring enables the pull rod to be restricted in a connection area between the guide rib and the positioning rib, namely a position A or a position B where the guide rib is located, and then opening and closing work can be completed.

In a further embodiment, the electromagnet comprises a square magnetic yoke, a framework, a multi-turn electromagnetic coil, a static iron core, an iron core spring and a movable iron core, wherein the square magnetic yoke is installed in the shell, the framework is arranged in the hollow tubular structure in the magnetic yoke, the multi-turn electromagnetic coil is arranged between the square magnetic yoke and the outer wall of the framework and coiled on the framework, the static iron core is positioned on the inner wall of the framework and arranged on the magnetic yoke, the iron core spring is connected with the static iron core, and the movable iron core is connected with the other end of the iron core spring; one end of the pull rod is arranged on the movable iron core;

the electromagnetic coil is connected with the circuit board, and the circuit board is used for supplying or disconnecting current to the electromagnetic coil;

a concave groove is formed at a preset distance from the free end of the movable iron core, and extends along the axis direction of the movable iron core for a preset distance;

the handle transmission rod is abutted with the inner wall of the concave groove.

In a further embodiment, the bottom length of the U-shaped pull rod is greater than the shortest length from the position of the pull rod on the electromagnet to the end face of the electromagnet, so that the pull rod can rotate along the contact position of the two.

In a further embodiment, the linkage rod comprises a rotating shaft connected with the shell, a torsion spring arranged on the rotating shaft, and a driving rod and a driven rod arranged on the rotating shaft;

wherein the two free ends of the torsion spring are arranged on the shell;

the shell is provided with a waist-shaped limiting through hole with a preset radian, and one end of the driven rod penetrates through the waist-shaped limiting through hole and extends towards one end far away from the shell;

at least when the electromagnet is switched off, the pull rod moves on the side face of the isolation blocking rib close to the linkage rod, and then the driving rod is pushed to rotate, so that the switching-off work is completed.

In a further embodiment, the circuit breaker comprises a single or a plurality of circuit breaker bodies, a switch handle and a tripping bar, wherein the switch handle and the tripping bar are arranged on the circuit breaker bodies;

the switch handle is sleeved on the linkage traction rod;

the trip bar is sleeved on the driven bar, and the linkage bar is used for driving the trip bar to move so as to enable the circuit breaker to trip and break.

The beneficial effects are that: the invention discloses an electromagnetic opening and closing mechanism and a circuit breaker, which are used for completing automatic opening and closing of the circuit breaker, and further the device is provided with a shell, an electromagnet arranged in the shell, a handle transmission rod abutted with the output end of the electromagnet, limiting pieces and linkage traction rods symmetrically arranged at two sides of the handle transmission rod, limiting springs arranged on the limiting pieces, a pull rod movably connected with the electromagnet, an isolation blocking rib arranged on the shell, a linkage rod integrally formed with the shell and rotatably connected with the shell, and a circuit board arranged in the shell; through setting up electro-magnet, special-shaped spacing spring in the casing, movable mounting keeps off the pull rod on the iron core in the electro-magnet, and locates keep off the muscle in isolation on the casing, and then can make the pull rod move near the isolation that the gangbar kept off the muscle side through the work of electro-magnet, and then accomplish the brake-separating work of circuit breaker, then through setting up spacing spring, and then can adjust the position of third elastic component in the spacing spring and pull rod, then the work of rethread electro-magnet, and then make the pull rod can move in the isolation that is close to the electro-magnet keeps off the muscle side, and then accomplish the switching-on work of circuit breaker, linkage pull rod drives the locating part and does anticlockwise rotation at this in the process, the locating part can press spacing spring and do anticlockwise rotation together with getting back to initial position, after accomplishing the circuit breaker and divide the brake or switching-on work, the coil loses electricity, the iron core can outwards pop up under the effect of iron core spring, and then the pull rod returns to the U type structure of spacing spring through setting up spacing spring and pull rod, and then adjust the position after accomplishing the circuit breaker and divide brake or work, and then the position through setting up the spacing spring and then need to carry out the position of the circuit breaker, and only take up the space to reduce and take up to the circuit breaker.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the closing state of the present invention.

FIG. 3 is a schematic diagram of the opening state of the present invention.

Fig. 4 is a schematic diagram of the closing process according to the present invention.

Fig. 5 is a schematic diagram of the closing completion electromagnet of the present invention not returning to the original position.

FIG. 6 is a schematic diagram of the opening process of the present invention.

Fig. 7 is a schematic diagram a of the opening completion electromagnet of the present invention not returned to its original position.

Fig. 8 is a schematic diagram b of the opening completion electromagnet of the present invention not returned to its original position.

Fig. 9 is a schematic view of an electromagnet of the present invention.

Fig. 10 is a schematic view of a handle drive lever of the present invention.

Fig. 11 is a schematic side view of an isolation rib B of the present invention.

Fig. 12 is a schematic side view of an isolation rib of the present invention.

The reference numerals are: the circuit breaker comprises a shell 1, an electromagnet 2, a magnetic yoke 21, a static iron core 22, an iron core spring 23, a movable iron core 24, a handle transmission rod 3, a limiting piece 4, a limiting spring 5, a linkage traction rod 6, a separation blocking rib 7, a pull rod 8, a linkage rod 9, a circuit breaker body 10, a positioning rib 11, a limiting rib 12 and a guide rib 13.

Detailed Description

Through research and analysis of the applicant, the reason for the problem (more mechanism parts and large occupied space) is that the miniature circuit breaker with an automatic control function in the current market is realized by driving a multistage gear through a small motor and then driving a handle through the gear. The motor type opening and closing mechanism has a plurality of transmission joints and a plurality of parts, so that the mechanism has slow response and a plurality of parts; the invention discloses a permanent magnet miniature circuit breaker with an automatic control function, wherein the automatic control function is realized by two sets of mechanisms, namely a set of brake closing mechanism and a set of brake opening mechanism, so that the mechanism parts are more, and the occupied space is large; through the electromagnet arranged in the shell, the special-shaped limit spring, the pull rod movably arranged on the movable iron core of the electromagnet and the isolation blocking rib arranged on the shell, the pull rod can move on the side surface of the isolation blocking rib close to the linkage rod through the work of the electromagnet, the opening work of the circuit breaker is completed, then the position of the third elastic piece in the limit spring and the pull rod can be adjusted through the arrangement of the limit spring, then the pull rod can move on the side surface of the isolation blocking rib close to the electromagnet through the work of the electromagnet, the closing work of the circuit breaker is completed, the linkage pull rod drives the limit piece to rotate anticlockwise, and the limit piece can press the limit spring to rotate anticlockwise together with the pull rod in the limit spring and rotate to the initial position together; the device can complete the switching-on and switching-off operation of the circuit breaker by only one mechanism, thereby reducing the amount of parts required by the device and further reducing the occupied space of the device.

An electromagnetic opening and closing mechanism and a circuit breaker, comprising: the circuit breaker comprises a shell 1, an electromagnet 2, a magnetic yoke 21, a static iron core 22, an iron core spring 23, a movable iron core 24, a handle transmission rod 3, a limiting piece 4, a limiting spring 5, a linkage traction rod 6, a separation blocking rib 7, a pull rod 8, a linkage rod 9, a circuit breaker body 10, a positioning rib 11, a limiting rib 12 and a guide rib 13.

The device comprises a shell 1, an electromagnet 2 arranged in the shell 1, a handle transmission rod 3 abutted with the output end of the electromagnet 2, limit pieces 4 and linkage traction rods 6 symmetrically arranged on two sides of the handle transmission rod 3, limit springs 5 arranged on the limit pieces 4, a pull rod 8 movably connected with the electromagnet 2, a separation rib 7 arranged on the shell 1, a linkage rod 9 rotatably connected with the shell 1 and a circuit board arranged on the shell 1, wherein the separation rib 7 is integrally formed with the shell 1; the handle transmission rod 3 is arranged on the shell 1, the limiting piece 4 extends towards the inside of the shell 1, and the linkage traction rod 6 extends towards a direction away from the shell 1; wherein the pull rod 8 is of a U-shaped structure, one end of the pull rod 8 is rotationally connected with the electromagnet 2, and the other free end is suspended; one end of the limit spring 5 is fixed with the shell 1; at least in the course of the work, drive pull rod 8 through electro-magnet 2 and keep off the different sides of muscle 7 and move, accomplish the divide-shut brake work, through setting up electro-magnet 2 in casing 1, special-shaped spacing spring 5, movable mounting moves pull rod 8 on the iron core 24 at electro-magnet 2, and locates keep off muscle 7 on casing 1, and then can make pull rod 8 be close to the separation that keeps off muscle 7 side of linkage rod 9 and move through the work of electro-magnet 2, and then accomplish the separating brake work of circuit breaker, then through setting up spacing spring 5, and then can adjust the position of third elastic component in the spacing spring 5 and pull rod 8, then the work of rethread electro-magnet 2, and then make pull rod 8 can move in the separation that is close to electro-magnet 2 keeps off muscle 7 side, and then accomplish the switching-on work of circuit breaker, and in this in-process linkage pull rod 6 drives spacing piece 4 and rotates anticlockwise, and moves spacing spring 5 anticlockwise, and get back to the pull rod 8 in spacing spring 5 together and rotate to initial position, after accomplishing the circuit breaker and the work, coil loses the iron core 24 and can be in the position at the position of the setting up spring 8 and the position that can take off the time, and then the position is just the position to the position that the setting up spring 8 is just to the position that the setting up of the spacing spring 8, and then can take the position to the circuit breaker, and the position that the setting up the position of the spring 8 is moved at the position that the position of the spring 8 is required to be moved to the position of the spacing spring 8.

A guide rib 13 with a preset radian, a positioning rib 11 connected with one end of the guide rib 13 and a limiting rib 12 connected with the positioning rib 11 are also arranged in the shell 1; the guide rib 13, the positioning rib 11 and the limiting rib 12 extend a preset distance in a direction away from the shell 1, wherein the extending distance of the guide rib 13 and the positioning rib 11 is larger than the extending distance of the limiting rib 12, and the positioning rib 11 and the limiting rib 12 are parallel to the side surface of the isolation blocking rib 7; a preset first gap is reserved between the positioning rib 11, the limiting rib 12 and the isolation blocking rib 7, a preset second gap is reserved between the guide rib 13 and one end of the isolation blocking rib 7, and the first gap is communicated with the second gap and is used as a movable channel of the pull rod 8; the pull rod 8 moves in the movable channel, so that the pull rod 8 can pass through the movable channel from the side surface of the isolation blocking rib 7 close to the linkage rod 9 to the side surface of the isolation blocking rib 7 close to the electromagnet 2, and further the pull rod 8 can perform interconversion between the two side surfaces of the isolation blocking rib 7, and the switching-on and switching-off work is completed; the limiting spring 5 comprises a first elastic piece, a second elastic piece connected with one end of the first elastic piece, a third elastic piece connected with one end of the second elastic piece and a fourth elastic piece connected with the third elastic piece, wherein the first elastic piece is sleeved on the limiting piece 4; the other end of the first elastic piece is fixed on the shell 1; the free end of the fourth elastic element extends away from the electromagnet 2; the third elastic piece is of a U-shaped structure, in the opening and closing process, the pull rod 8 is positioned in a U-shaped area surrounded by the third elastic piece, the limiting spring 5 is pushed to deform, and the elastic force generated by the limiting spring 5 enables the pull rod 8 to be restricted in the connection area of the guide rib 13 and the positioning rib 11 or positioned in the area of the guide rib 13 in advance, so that opening and closing work can be completed; through the limiting spring 5, when the pull rod 8 moves, the pull rod 8 can be positioned at different positions according to the opening or closing operation through different rotation directions of the limiting piece 4, so that the next opening and closing operation can be smoothly performed, meanwhile, the pull rod 8 can be positioned in the U-shaped groove of the third elastic piece through the U-shaped structure of the third elastic piece, and then the pull rod 8 can be driven to move during limiting displacement, and the position of the pull rod 8 is limited; the motion track of the limiting spring 5 swings between the position A and the position B in a small amplitude and is used for adjusting the position of the connecting rod after being rebounded by the iron core, so that the connecting rod is ready for the closing of the next step after closing and opening.

The electromagnet 2 comprises a square magnetic yoke 21 arranged in the shell 1, a framework of a hollow tubular structure arranged in the magnetic yoke 21, a plurality of turns of electromagnetic coils arranged between the square magnetic yoke 21 and the outer wall of the framework and coiled on the framework, a static iron core 22 arranged on the inner wall of the framework and arranged on the magnetic yoke 21, an iron core spring 23 connected with the static iron core 22, and a movable iron core 24 connected with the other end of the iron core spring 23; one end of the pull rod 8 is arranged on the movable iron core 24; the electromagnetic coil is connected with the circuit board, and the circuit board is used for supplying or disconnecting current to the electromagnetic coil; a concave groove is formed at a preset distance from the free end of the movable iron core 24, and extends along the axis direction of the movable iron core 24 for a preset distance; the handle transmission rod 3 is abutted with the inner wall of the concave groove; through the circuit board that sets up can make electric current flow in solenoid, when the solenoid is circular telegram, and then can produce the magnetic field and then make movable iron core 24 to the direction motion of quiet iron core 22 in yoke 21, and then can make iron core spring 23 be in compressed state, then movable iron core 24 of motion can drive pull rod 8 and move, and when solenoid loses the electricity, the iron core spring 23 of compressing produces elasticity this moment, make movable iron core 24 to the direction of keeping away from quiet iron core 22 pop out, through supplying power for electro-magnet 2, and then can drive pull rod 8 and move side A or make pull rod 8 move side B in the isolation fender muscle 7 side that is close to movable iron core 24 in the isolation fender muscle 7 side that is close to linkage rod 9, and then guarantee the smooth going on of circuit breaker switching operation.

The bottom length value of the U-shaped pull rod 8 is larger than the shortest length from the position of the pull rod 8 on the electromagnet 2 to the end face of the electromagnet 2, so that the pull rod 8 can conveniently rotate along the contact position of the two.

The linkage rod 9 comprises a rotating shaft connected with the shell 1, a torsion spring arranged on the rotating shaft, and a driving rod and a driven rod arranged on the rotating shaft; wherein the two free ends of the torsion spring are arranged on the shell 1; the shell 1 is provided with a waist-shaped limiting through hole with a preset radian, and one end of the driven rod penetrates through the waist-shaped limiting through hole and extends towards one end far away from the shell 1; at least when the electromagnet 2 is switched off, the pull rod 8 moves on the side face of the isolation blocking rib 7 close to the linkage rod 9, so that the driving rod is pushed to rotate, and the switching off work is completed; through the torsional spring that sets up, and then under the non-operating condition, the side A butt on the spacer rib 7 is kept apart to the gangbar 9, and in electro-magnet 2 separating brake in-process, gangbar 9 can be always with the other end steady voltage of pull rod 8 on keeping apart when the side A of rib under the torsional spring effect, and when moving iron core 24 to the lower extreme, pull rod 8 is Y type little contained angle with moving iron core 24 always, make moving iron core 24 when being to keeping away from the motion of quiet iron core 22 direction, pull rod 8 can not rotate, only can be along keeping apart when the side A of rib upward movement, and then can play spacing work to pull rod 8.

The circuit breaker comprises a plurality of circuit breaker bodies 10, and a switch handle and a tripping rod which are arranged on the circuit breaker bodies 10; the switch handle is sleeved on the linkage traction rod 6; the trip bar is sleeved on the driven bar, and the linkage bar 9 is used for driving the trip bar to move so as to trip and break the breaker.

Description of working principle: in the actual working process, the device is divided into four working processes of manual brake opening, manual brake closing, electromagnet 2 brake opening and electromagnet 2 brake closing;

the manual brake separating process comprises the following steps: the switch handle in the circuit breaker is manually pushed downwards to enable the switch mechanism to be opened, meanwhile, the linkage traction rod 6 is driven, the linkage drives the limiting piece 4 to rotate clockwise together, one end of the limiting spring 5 is fixed, the limiting piece 4 loses the limiting function on the limiting spring 5 due to clockwise rotation, and therefore the other end of the limiting spring 5 rotates clockwise under the action of self elastic force and rotates to the position B together with the pull rod 8 returned into the limiting spring 5;

the manual closing process is as follows: the switch handle is manually pushed upwards, so that the switch mechanism is switched on, meanwhile, the linkage traction rod 6 is driven, the linkage drives the limiting piece 4 to rotate anticlockwise together, the limiting piece 4 can press the limiting spring 5 to rotate anticlockwise, and the limiting piece and the pull rod 8 returned into the limiting spring 5 rotate to the position A together;

the switching-off process of the electromagnet 2 is as follows: before the opening process, the circuit breaker is in a closing state, the limit spring 5 and the pull rod 8 are positioned at the position A, then when the electromagnet 2 is in opening operation, the electromagnetic coil is electrified, so that a magnetic field can be generated in the magnetic yoke 21, the movable iron core 24 moves towards the static iron core 22, the iron core spring 23 is in a compressed state, then the movable iron core 24 which moves can drive the pull rod 8 to move, the other end of the pull rod 8 can only abut against the side surface (namely the side surface A) of the isolation rib 7 close to the link rod 9 under the limit action of the limit spring 5 and the isolation rib 7, and move along the length direction of the isolation rib 7, because the torsion spring is arranged on the link rod 9, when the pull rod 8 moves downwards along the side surface A of the isolation rib 7, the link rod 8 can push the link rod 9 to rotate clockwise, so that the other end of the link rod 9 also rotates clockwise, therefore, the driven rod drives the tripping rod in the circuit breaker to move, so that the switch can trip and break, meanwhile, the linkage rod 9 always stabilizes the other end of the pull rod 8 on the side face A of the isolation rib under the action of torsion spring force, and when the movable iron core 24 moves to the lowest end, the pull rod 8 and the movable iron core 24 always form a Y-shaped small included angle, so that when the movable iron core 24 moves in a direction away from the static iron core 22, the pull rod 8 does not rotate, only moves upwards along the side face A of the isolation rib, then after the switch breaks, the electromagnetic coil is powered off, at the moment, the compressed iron core spring 23 generates elasticity, so that the movable iron core 24 pops up in a direction away from the static iron core 22, and then the pull rod 8 is driven to move upwards along the side face A of the isolation rib 7, so that the pull rod 8 returns to the U-shaped groove of the limit spring 5, namely the third elastic piece, in the process, a switch handle in the breaker after opening the switch moves downwards, so that the linkage traction rod 6 can be driven to move clockwise, and the linkage traction rod 6 can be linked to drive the handle transmission rod 3 and the limiting piece 4 to rotate clockwise, and as one end of the limiting spring 5 is fixed, when the limiting piece 4 rotates clockwise, the limiting piece 4 loses the limiting function on the limiting spring 5 due to clockwise rotation, so that the other end of the limiting spring 5 rotates clockwise under the action of self elastic force, and the other end of the limiting spring together with the pull rod 8 returned into the limiting spring 5 rotates to the position B;

the closing process of the electromagnet 2 is as follows: before the closing process, the circuit breaker is in a separating brake state, the limit spring 5 and the pull rod 8 are positioned at the position B, then when the electromagnet 2 is closed, the electromagnetic coil is electrified, so that a magnetic field can be generated in the magnetic yoke 21, the movable iron core 24 moves towards the static iron core 22, one end of the pull rod 8 is inserted on the movable iron core 24 due to the U-shaped structure, the other end of the pull rod 8 only moves downwards along the side B of the isolation blocking rib 7 (namely the side of the isolation blocking rib 7 close to the movable iron core 24) under the limit action of the limit spring 5 and the isolation blocking rib 7, and the movable iron core 24 drives the handle driving rod 3 to rotate anticlockwise when the movable iron core 24 moves towards the static iron core 22, and the linkage driving linkage traction rod 6 rotates anticlockwise, so that the switch finally reaches the closing position; after the switch is closed, the electromagnetic coil is deenergized, under the action of the iron core spring 23, the movable iron core 24 can pop out in the direction away from the static iron core 22, the pull rod 8 is driven to move upwards along the side face B of the isolation blocking rib 7, the pull rod 8 returns to the U-shaped groove of the limit spring 5, meanwhile, the linkage pull rod 6 drives the limit piece 4 to rotate anticlockwise, and the limit piece 4 can press the limit spring 5 to rotate anticlockwise and rotate to the position A together with the pull rod 8 returning to the limit spring 5.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solutions of the present invention within the scope of the technical concept of the present invention, and these equivalent changes all fall within the scope of the present invention.

Claims (8)

1. An electromagnetic opening and closing mechanism, comprising:

the device comprises a shell, an electromagnet arranged in the shell, a handle transmission rod, limit pieces and linkage traction rods, limit springs, a pull rod, an isolation blocking rib, a linkage rod and a circuit board, wherein the handle transmission rod is in butt joint with the output end of the electromagnet;

the handle transmission rod is arranged on the shell, the limiting piece extends towards the inside of the shell, and the linkage traction rod extends towards the direction away from the shell;

wherein the pull rod is of a U-shaped structure, one end of the pull rod is rotationally connected with the electromagnet, and the other free end of the pull rod is suspended;

one end of the limiting spring is fixed with the shell;

at least in the working process, the electromagnet drives the pull rod to move on different sides of the isolation blocking rib, so that the switching-on and switching-off work is completed.

2. The electromagnetic opening and closing mechanism according to claim 1, wherein: the shell is internally provided with a guide rib with a preset radian, a positioning rib connected with one end of the guide rib and a limiting rib connected with the positioning rib;

the guide rib, the positioning rib and the limiting rib extend a preset distance in a direction away from the shell, wherein the extending distance of the guide rib and the positioning rib is larger than the extending distance of the limiting rib, and the positioning rib and the limiting rib are parallel to the side face of the isolation blocking rib;

a preset first gap is reserved between the positioning rib, the limiting rib and the isolation blocking rib, a preset second gap is reserved between the guide rib and one end of the isolation blocking rib, and the first gap is communicated with the second gap and serves as a movable channel of the pull rod;

through making the pull rod move in the movable channel, make the pull rod can be from the isolation fender muscle side that is close to the gangbar through the movable channel and move to the isolation fender muscle side that is close to the electro-magnet, and then make the pull rod can keep apart and keep off and change each other between the muscle both sides face, accomplish the divide-shut brake work.

3. The electromagnetic opening and closing mechanism according to claim 1, wherein: the limiting spring comprises a first elastic piece, a second elastic piece connected with one end of the first elastic piece, a third elastic piece connected with one end of the second elastic piece and a fourth elastic piece connected with the third elastic piece, wherein the first elastic piece is sleeved on the limiting piece;

the other end of the first elastic piece is fixed on the shell;

the free end of the fourth elastic piece extends in a direction away from the electromagnet;

the third elastic piece is of a U-shaped structure, the pull rod is located in a U-shaped area surrounded by the third elastic piece in the opening and closing process, the limiting spring is pushed to deform the pull rod, and the elastic force generated by the limiting spring enables the pull rod to be restricted in the connection area of the guide rib and the positioning rib or located in the area of the guide rib in advance, so that opening and closing work can be completed.

4. An electromagnetic opening and closing mechanism according to claim 3, characterized in that: the electromagnet comprises a square magnetic yoke arranged in the shell, a framework of a hollow tubular structure arranged in the magnetic yoke, a multi-turn electromagnetic coil arranged between the square magnetic yoke and the outer wall of the framework and coiled on the framework, a static iron core arranged on the inner wall of the framework and arranged on the magnetic yoke, an iron core spring connected with the static iron core, and a movable iron core connected with the other end of the iron core spring; one end of the pull rod is arranged on the movable iron core;

the electromagnetic coil is connected with the circuit board, and the circuit board is used for supplying or disconnecting current to the electromagnetic coil;

a concave groove is formed at a preset distance from the free end of the movable iron core, and extends along the axis direction of the movable iron core for a preset distance;

the handle transmission rod is abutted with the inner wall of the concave groove.

5. The electromagnetic opening and closing mechanism according to claim 1, wherein: the numerical value of the length of the bottom of the U-shaped pull rod is larger than the shortest length from the position of the pull rod on the electromagnet to the end face of the electromagnet, so that the pull rod can conveniently rotate along the contact position of the pull rod and the electromagnet.

6. The electromagnetic opening and closing mechanism according to claim 5, wherein: the linkage rod comprises a rotating shaft connected with the shell, a torsion spring arranged on the rotating shaft, and a driving rod and a driven rod arranged on the rotating shaft;

wherein the two free ends of the torsion spring are arranged on the shell;

the shell is provided with a waist-shaped limiting through hole with a preset radian, and one end of the driven rod penetrates through the waist-shaped limiting through hole and extends towards one end far away from the shell;

at least when the electromagnet is switched off, the pull rod moves on the side face of the isolation blocking rib close to the linkage rod, and then the driving rod is pushed to rotate, so that the switching-off work is completed.

7. A circuit breaker characterized by the use of an electromagnetic opening and closing mechanism according to any of claims 1-6.

8. A circuit breaker according to claim 7, characterized in that: the circuit breaker comprises a single or a plurality of circuit breaker bodies, a switch handle and a tripping rod, wherein the switch handle and the tripping rod are arranged on the circuit breaker bodies;

the switch handle is sleeved on the linkage traction rod;

the trip bar is sleeved on the driven bar, and the linkage bar is used for driving the trip bar to move so as to enable the circuit breaker to trip and break.