CN113871264B

CN113871264B - Small-size automatic opening and closing circuit breaker

Info

Publication number: CN113871264B
Application number: CN202111161220.9A
Authority: CN
Inventors: 孙斌朋; 潘如新; 孙泽凯; 唐庭; 王春梅
Original assignee: Huanyu Hi Tech Co ltd
Current assignee: Huanyu Hi Tech Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2024-07-30
Anticipated expiration: 2041-09-30
Also published as: CN113871264A

Abstract

The invention discloses a small-size automatic opening and closing circuit breaker, which relates to the field of circuit breakers and comprises a circuit breaker module and an electric operation module, wherein the circuit breaker module comprises a shell, an opening and closing mechanism, an electromagnetic mechanism, a thermal tripping mechanism, an arc extinguishing mechanism and an incoming and outgoing line plate, the electric operation module can drive the circuit breaker module to automatically open and close through remote control, the opening and closing mechanism comprises a handle, a contact support, a moving contact, a large lock catch and a trip buckle, the contact support and the handle are respectively rotatably arranged in the shell, the large lock catch and the moving contact are respectively hinged to the contact support, the contact support is provided with a third installation part, a second installation part and a first installation part, the moving contact is provided with a lug extending outwards along the radial direction and positioned between the large lock catch and the contact support, and one side of the large lock catch, which faces the moving contact, is provided with a first recess of the lug movement range. The invention has the advantages of small occupied space and reasonable layout.

Description

Small-size automatic opening and closing circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to an automatic opening and closing circuit breaker with a small volume.

Background

The circuit breaker is used as a switch capable of providing various protection functions, and can effectively improve the safety and reliability of electrical equipment and power utilization lines. In order to meet the increasingly diversified demands of users, the diversification and miniaturization of the specifications of circuit breakers is a trend; at present, the thickness direction of a switching-on and switching-off mechanism of a traditional circuit breaker generally needs 18mm of space for placing, and the requirement of miniaturization of the circuit breaker cannot be met.

Disclosure of Invention

In order to overcome the defects of the background technology, the invention provides the automatic opening and closing circuit breaker with small occupied space and reasonable layout and small volume.

The invention adopts the technical scheme that: the circuit breaker comprises a circuit breaker module and an electric operating module, wherein the circuit breaker module comprises a shell, a switching-on/off mechanism, an electromagnetic mechanism, a thermal tripping mechanism, an arc extinguishing mechanism and an incoming and outgoing line plate, the electric operating module can drive the circuit breaker module to automatically switch on/off through remote control,

The opening and closing mechanism comprises a handle, a contact support, a moving contact, a large lock catch and a jump button, wherein the contact support and the handle are respectively and rotatably installed in the shell, the large lock catch and the moving contact are respectively and hingedly installed on the contact support, the contact support is provided with a third installation part for installing the moving contact and being positioned at the lower end, a second installation part for installing the large lock catch and being positioned in the middle, a first installation part for installing the jump button and being positioned at the upper end, and the moving contact is provided with a lug extending outwards along the radial direction and being positioned between the large lock catch and the contact support.

The large lock catch is provided with a first recess for avoiding the movement range of the lug on one side of the moving contact, the jump buckle is hinged on the contact support, the jump buckle is provided with a hasp surface corresponding to the large lock catch, the upper end of the large lock catch is provided with a convex strip, and the convex strip is provided with a groove which is downwards arranged and matched with the hasp surface.

The second installation part is provided with a second installation column for hinging and installing the large lock catch, one side of the second installation column is provided with a second recess, the lower side of the second recess is provided with a first boss supporting the lug and in sliding fit with the lug, the third installation part is provided with a fourth boss which is equal in height with the first boss and is used for installing the moving contact, and the second installation column is positioned in front of the swing track of the lug and forms limit fit with the first boss and the second boss;

The upper side of the second recess is provided with a third boss, the large lock catch is provided with a second mounting hole hinged with the second mounting column, the first recess is positioned on one side of the second mounting hole, the other side of the second mounting hole is provided with a fifth boss in sliding fit with the third boss, and the side wall of the fifth boss is provided with a plurality of sixth bosses connected with the inner wall of the second mounting hole into a whole;

The left side of the second recess is provided with a second boss, one side of the first recess away from the second mounting hole is provided with a seventh boss in sliding fit with the second boss, a first step surface is arranged above the second boss, and a second step surface corresponding to the first step surface is arranged above the seventh boss.

The shell is provided with first limit bosses at positions corresponding to two sides of the handle, and the handle and the jump buckle are connected in a linkage manner through a U-shaped connecting rod.

The shell is internally provided with a second limiting boss corresponding to the contact supporting side wall, the upper end of the contact supporting is provided with a positioning column, the shell is provided with a spring installation position above the second limiting boss, and a reset piece which is in contact with the positioning column and the spring installation position is arranged between the positioning column and the spring installation position.

The electromagnetic mechanism comprises a coil assembly and an iron core assembly, the coil assembly comprises a coil and a fixed contact, the iron core assembly comprises a movable iron core, a fixed iron core and a push rod, the fixed iron core is fixedly connected with the fixed contact, an installation position for sliding installation of the movable iron core is arranged on the shell, an elastic piece for abutting against the movable iron core is arranged between the push rod and the fixed iron core, one end of the push rod, far away from the fixed iron core, is matched with the movable iron core in a contact manner by utilizing the pretightening force of the elastic piece, the fixed iron core is provided with a first through hole for the push rod to penetrate through, and the coil surrounds and is arranged on the outer circumferences of the movable iron core and the fixed iron core in a non-contact manner.

The movable iron core is provided with a mounting groove for inserting one end of the ejector rod, the static iron core is internally provided with an annular step arranged around the ejector rod, one end of the ejector rod in the mounting groove is provided with an annular boss, and the elastic piece is sleeved on the ejector rod, and the two ends of the elastic piece respectively abut against the annular step and the annular boss;

the static contact is fixedly arranged in the shell and is provided with a mounting hole for mounting one end of the static iron core; the magnetic yoke is U-shaped and is arranged in the shell, a second through hole for the static iron core to pass through is formed in the side wall of one side of the magnetic yoke, and avoiding holes for avoiding the movable iron core and the static iron core are formed in the side wall of the other side of the magnetic yoke; the movable iron core is columnar, and the part of the movable iron core positioned in the installation position is narrowed; the ejector rod is made of aluminum alloy or copper alloy.

The electric operation module comprises a motor, a gear set connected with the output end of the motor, a coupler and a tripping mechanism, wherein the gear set comprises a first gear, a second gear, a third gear and a handle gear which are positioned on the same horizontal plane, the coupler is fixedly connected with the handle relatively, the handle gear is hinged to the coupler and is provided with a gear boss extending along the radial direction, the coupler is provided with a stop block which corresponds to the gear boss and is in contact fit with the gear boss, the handle gear is provided with a first state for driving the handle to be closed through the forward rotation of the motor and the contact fit of the gear boss and the stop block when the handle gear is positioned at an initial position, and is provided with a second state for driving the handle to be opened through the tripping mechanism when the handle gear is positioned at the second state, so that the stop block is close to the gear boss again.

The first gear, the second gear, the third gear and the handle gear are positioned on the same horizontal plane; the tripping mechanism is arranged in the shell and the height of the tripping mechanism is lower than the horizontal plane height of the gear set;

the tripping mechanism comprises a tripping rod and a small lock catch which are rotatably arranged in the shell, the tripping rod is equal to the handle gear in height, and the tripping rod is provided with a first deflector rod which extends out along the radial direction and corresponds to the gear boss;

The small lock catch is positioned between the first gear and the third gear and below the second gear, the small lock catch is arranged at the same height as the trip rod, and the trip rod is provided with a second deflector rod which extends out along the radial direction and corresponds to the small lock catch.

The number of teeth of the handle gear is adapted to the swing range of the trip bar, and a third recess avoiding the handle gear is arranged between the first deflector rod and the second deflector rod on the trip bar;

a square hole connected with the handle through a square shaft is formed in the center of the coupler;

And the coupler, the handle gear and the tripping rod are respectively provided with induction magnetic steel.

The beneficial effects of the invention are as follows: in order to meet the requirements of the miniature circuit breaker, the large jump button lock catch, the moving contact and the layout supported by the contact are adjusted, the moving contact is clamped between the large jump button lock catch and the contact support, the contact support is divided into a first installation part, a second installation part and a third installation part, the three parts are in a ladder shape, the thickness dimension of the large jump button lock catch, the moving contact and the contact support during installation is greatly reduced, and the miniature circuit breaker has the advantages of small occupied space and reasonable layout.

Drawings

Fig. 1 is a schematic structural diagram of an automatic opening and closing circuit breaker with small volume according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the opening and closing mechanism.

Fig. 3 is a schematic view of the structure of the contact support.

Fig. 4 is a schematic structural view of the large latch.

Fig. 5 is a schematic view of the structure of the contact support, trip button and moving contact.

Fig. 6 is a schematic view of the structure of the housing on the side of the circuit breaker module.

Fig. 7 is a schematic diagram of a circuit breaker when closed.

Fig. 8 is a schematic structural diagram of a circuit breaker trip instant.

Fig. 9 is a cross-sectional view of the core assembly.

Fig. 10 is a schematic structural view of the yoke.

Fig. 11 is a schematic structural view of a stationary contact.

Fig. 12 is a schematic view of the back structure of the contact support and moving contact.

Fig. 13 is a schematic diagram of the structure of the electric operating mechanism when the electric operating mechanism is opened.

Fig. 14 is a schematic diagram of the structure of the electric operating mechanism when the electric operating mechanism is closed.

Fig. 15 is a schematic view of the structure of the electric actuator when locked.

Fig. 16 is a schematic view of the structure of the handle gear returning to the initial position.

Fig. 17 is a schematic view of the structure with the second gear removed when the handle gear is returned to the initial position.

Fig. 18 is a schematic view of the structures of the small latch and the large latch.

Fig. 19 is a schematic structural view of the coupling.

Detailed Description

Embodiments of the invention are further described below with reference to the accompanying drawings:

As shown in the figure, the circuit breaker comprises a circuit breaker module and an electric operation module, wherein the circuit breaker module comprises a shell 1, a switching mechanism, an electromagnetic mechanism, a thermal tripping mechanism, an arc extinguishing mechanism and an incoming and outgoing line plate, the electric operation module can drive the circuit breaker module to automatically switch on and off through remote control, the switching mechanism comprises a handle 31, a contact support 32, a moving contact 33, a large lock catch 34 and a trip button 35, the contact support 32 and the handle 31 are respectively rotatably installed in the shell 1, the large lock catch 34 and the moving contact 33 are respectively hinged on the contact support 32, the contact support 32 is provided with a third installation part 323 for installing the moving contact 33 and positioned at the lower end, a second installation part 322 for installing the large lock catch 34 and having a thickness dimension larger than that of the third installation part 323 and positioned in the middle, and a first installation part 321 for installing the trip button 35 and positioned at the upper end, the moving contact 33 is provided with a first concave part 331 extending outwards along the radial direction and positioned between the large lock catch 34 and the contact support 32, and the moving contact 34 is provided with a first concave part 341 which is provided with a moving lug 33 at one side facing to avoid the moving lug 33; in order to meet the requirements of the miniature circuit breaker, the layout of the jump button 35, the large lock catch 34, the moving contact 33 and the contact support 32 is adjusted, the moving contact 33 is clamped between the large lock catch 34 and the contact support 32, the contact support 32 is divided into a first mounting part 321, a second mounting part 322 and a third mounting part 323, the three parts are in a ladder shape, the thickness dimension of the large lock catch 34, the moving contact 33 and the contact support 32 during mounting is greatly reduced, and the miniature circuit breaker has the advantages of small occupied space and reasonable layout.

The jump button 35 is hinged on the contact support 32 and is provided with a hasp surface 351 corresponding to the large lock catch 34, the upper end of the large lock catch 34 is provided with a convex strip 342, and the convex strip 342 is provided with a groove 343 which is downwards arranged and matched with the hasp surface 351; the upper ends of the contact supports 32 are thinned, and the two are connected by rivets after the snap fastener 35 is installed.

The second mounting portion 322 is provided with a second mounting post 3221 for hinged mounting of the large lock catch 34, one side of the second mounting post 3221 is provided with a second recess 3222, the lower side of the second recess 3222 is provided with a first boss 3223 supporting the lug 331 and in sliding fit with the lug 331, the third mounting portion 323 is provided with a fourth boss 3231 which is equal in height to the first boss 3223 and is used for mounting of the movable contact 33, and the second mounting post 3221 is positioned in front of the swing track of the lug 331 and forms limit fit with the lug; the first boss and the fourth boss can be used for supporting the movable contact, so that the friction force generated by supporting contact with the contact can be reduced in the swinging process of the movable contact under the action of spring force, and the movable contact can swing stably and horizontally and cannot swing vertically and vertically; the third mounting column 3232 for mounting the moving contact on the fourth boss 37 is located below the lock catch, the height of the third mounting column is flush with the height of the lock catch, the lock catch completely avoids the contact spring and the third mounting column when moving, so that the mounting position of the moving contact and the contact support is free from the influence of the lock catch height, and the size of the operating mechanism is reduced. And because the influence of the height of the lock catch is avoided, the thickness of the contact support at the position is enhanced, the strength of the contact support is increased, the force transmitted to the contact support by the handle through the U-shaped connecting rod and the jump buckle can not deform the contact support, and the service life of the mechanism is prolonged.

The upper side of the second recess 3222 is provided with a third boss 3224, the large lock catch 34 is provided with a second mounting hole 344 hinged with the second mounting column 3221, the first recess 341 is positioned on one side of the second mounting hole 344, the other side of the second mounting hole 344 is provided with a fifth boss 345 in sliding fit with the third boss 3224, and the side wall of the fifth boss 345 is provided with a plurality of sixth bosses 346 connected with the inner wall of the second mounting hole 344 into a whole;

A second boss 3225 is disposed on the left side of the second recess 3222, a seventh boss 347 in sliding fit with the second boss 3225 is disposed on the side of the first recess 341 away from the second mounting hole 344, a first step surface 3226 is disposed above the second boss 3225, and a second step surface 348 corresponding to the first step surface 3226 is disposed above the seventh boss 347; the second mounting hole 344 of the lock catch is hinged on the second mounting post 3221, the fifth boss 345 of the lock catch is in contact with the third boss 3224, the seventh boss 347 of the lock catch is in contact with the second boss 3225, the strength of the lock catch is ensured while the thickness of the lock catch is reduced, and the stable mounting of the lock catch is ensured.

The surface of the contact support far away from the second mounting column 3221 is provided with a counter bore 3227 corresponding to the position of the second mounting column, a through hole 3228 is formed in the second mounting column, a protruding block 19 embedded in the counter bore and a mounting shaft (not shown) inserted into the protruding block 19 and penetrating through the through hole are arranged on the shell, and under the condition that the overall thickness is limited, the strength of the contact support can be increased only by adding a concave counter bore to the contact support without increasing the thickness.

By providing the second recess 3222, the first boss 3223, the third boss 3224 and the second boss 3225 are formed, the first boss 3223, the fifth boss 345 and the second boss 3225 are all narrow sides, and friction force can be reduced when the first boss 3223 is slidably matched with the lug 331, the second boss 3225 is slidably matched with the seventh boss 347 and the fifth boss 345 is slidably matched with the third boss 3224.

The shell 1 is provided with first limit bosses 11 at positions corresponding to two sides of the handle 31, and the handle 31 and the jump button 35 are connected in a linkage manner through a U-shaped connecting rod 311.

The shell 1 is internally provided with a second limit boss 12 corresponding to the side wall of the contact support 32, the upper end of the contact support 32 is provided with a positioning column 3211, the shell 1 is provided with a spring mounting position 13 above the second limit boss 12, and a reset piece 14 which is in contact with the positioning column 3211 and the spring mounting position 13 is arranged between the positioning column and the spring mounting position 13.

When the product is in the brake separating state, the push handle 31 rotates anticlockwise, the handle 31 drives the jump button 35 to rotate around the rivet through the U-shaped connecting rod 311, when the hasp face 351 of the jump button 35 props against the groove 343 of the hasp, the jump button 35 drives the hasp to rotate, the hasp props against the contact support 32, the contact support 32 drives the contact support 32 to rotate, the contact support 32 drives the moving contact 33 to rotate, when the side face of the handle 31 touches the first limit boss 11 which rotates to the shell 1, the handle 31 stops rotating, the moving contact 33 contacts with the fixed contact 42, and the product realizes brake closing.

When the circuit has a short circuit fault, the electromagnetic mechanism is driven by the coil 41 to act, the ejector rod 45 in the electromagnetic mechanism is pushed to act right, the ejector rod 45 pushes the lock catch to rotate anticlockwise, the groove 343 of the lock catch is separated from the hasp surface 351 of the jump catch 35 when the lock catch rotates, and the mechanism is unlocked.

The contact support 32 rotates anticlockwise under the action of the reset piece 14, when the contact support 32 abuts against the second limiting boss 12 of the shell 1, the contact support 32 stops rotating, the contact support 32 returns to the initial position, and the lock catch also returns to the initial position under the action of the lock catch reset piece 58. The jump button 35 continues to rotate clockwise under the action of the U-shaped connecting rod 311 at the moment of disengaging from the lock catch, and stops moving after rotating to the rightmost point. Then, under the action of the reversing force of the spring of the handle 31, the handle 31 drives the jump button 35 to rotate through the U-shaped connecting rod 311, when the jump button 35 contacts with the lock catch, the jump button 35 overcomes the reaction force of the lock catch resetting piece under the action force of the spring of the handle 31, the hasp surface 351 of the jump button 35 is pressed back to the groove 343 of the lock catch, and when the side surface of the handle 31 touches the first limit boss 11 rotating to the other side of the shell 1, the handle 31 stops rotating, and the handle 31 and the jump button 35 return to the initial positions.

When the product has overload fault, the double-metal is heated to bend rightwards under the action of the current through larger current, the pull rod is driven to move rightwards, the pull rod drives the lock catch to rotate anticlockwise through the rivet, the groove 343 of the lock catch is separated from the hasp surface 351 of the jump button 35 when the lock catch rotates, and the mechanism is unlocked.

The contact support 32 rotates anticlockwise under the action of the reset piece 14, when the contact support 32 abuts against a boss on the shell, the contact support 32 stops rotating, the contact support 32 returns to the initial position, and at the moment, the lock catch also returns to the initial position under the action of the lock catch reset piece; the shell 1 is provided with a latch reset piece at the upper position of the latch 5, one end of the latch reset piece is abutted against the side wall of the shell, the other end of the latch reset piece is lapped on the raised strip, the latch 35 continuously rotates clockwise under the action of the U-shaped connecting rod 311 at the moment of disengaging from the latch, the latch 35 stops moving after rotating to the rightmost point, then the latch 35 is driven to rotate by the handle 31 through the U-shaped connecting rod 311 under the action of the reversing force of the spring of the handle 31, when the latch 35 contacts with the latch, the latch 35 overcomes the reaction force of the latch reset piece under the action force of the spring of the handle 31, the latch face 351 of the latch 35 is pressed back to the surface of the groove 343 of the latch, and when the side face of the handle 31 is abutted against the boss of the shell 1, the handle 31 stops rotating, and the latch 35 returns to the initial position.

The latch reset piece adopts the torsion spring, and the latch reset piece is not arranged in the height direction of the latch, and the latch reset piece of the conventional circuit breaker latch is arranged in the height direction of the latch, so that the thickness dimension is increased.

The electromagnetic mechanism comprises a coil assembly and an iron core assembly, the coil assembly comprises a coil 41 and a fixed contact 42, the iron core assembly comprises a movable iron core 43, a fixed iron core 44 and a push rod 45, the fixed iron core 44 is fixedly connected with the fixed contact 42, a mounting position 15 for sliding installation of the movable iron core 43 is arranged on the shell 1, an elastic piece 46 for abutting against the movable iron core 43 is arranged between the push rod 45 and the fixed iron core 44, one end of the push rod 45 far away from the fixed iron core 44 is in contact fit with the movable iron core 43 by utilizing the pretightening force of the elastic piece 46, the fixed iron core 44 is provided with a first through hole 441 for the push rod 45 to pass through, and the coil 41 is arranged on the outer circumferences of the movable iron core 43 and the fixed iron core 44 in a surrounding and non-contact mode; according to the technical scheme, the movable iron core 43 is slidably arranged in the mounting position 15 of the shell 1, the elastic piece 46 is sleeved into the ejector rod 45, one end of the elastic piece is abutted against the movable iron core 43 through the ejector rod 45, the other end of the ejector rod 45 is pressed in the static iron core 44, one end of the ejector rod 45 is in contact with the movable iron core 43, one end of the ejector rod penetrates into a hole of the static iron core 44, the movable iron core 43 is suspended and fixed in the coil 41 through the ejector rod 45, the movable iron core 43 is in non-contact with the coil 41, a coil 41 framework in a traditional electromagnetic mechanism is removed, and the whole size of the electromagnetic mechanism is reduced.

The mounting position 15 adopts a sliding groove, and the elastic piece 46 adopts a spring.

The movable iron core 43 is provided with a mounting groove 431 for inserting one end of the ejector rod 45, the static iron core 44 is internally provided with an annular step 442 arranged around the ejector rod 45, one end of the ejector rod 45 in the mounting groove 431 is provided with an annular boss 451, the elastic piece 46 is sleeved on the ejector rod 45, and two ends of the elastic piece respectively abut against the annular step 442 and the annular boss 451; the mounting groove 431 of the moving core 43 can be used for inserting and mounting the ejector rod 45, the size of the mounting groove 431 is larger than that of the annular boss 451 and the elastic piece 46, the elastic piece 46 and the ejector rod 45 can be prevented from being separated, stability is provided, the annular step 442 is arranged to enable the static core 44 to form a counter bore, and the elastic piece 46 plays the same role as the mounting groove 431 in the counter bore.

The fixed contact 42 is fixedly arranged in the shell 1, and the fixed iron core 44 is fixed on the shell 1 through the fixed contact 42; the fixed contact 42 is provided with a mounting hole 421 for mounting one end of the fixed core 44; the magnetic yoke 47 is U-shaped and is arranged in the shell 1, a second through hole 471 for the static iron core 44 to pass through is formed in the side wall of one side of the magnetic yoke 47, and a avoiding hole 472 for avoiding the movable iron core 43 and the static iron core 44 is formed in the side wall of the other side of the magnetic yoke; in the mounting process, the static iron core 44, the movable iron core 43, the elastic member 46 and the ejector rod 45 are mounted, then the whole is mounted from the avoiding hole 472 of the magnetic yoke 47 until the static iron core 44 passes through the second through hole 471, and then the magnetic yoke 47 and the iron core assembly are mounted on the shell together;

The movable iron core 43 is columnar and the part thereof positioned in the installation position 15 is narrowed; the ejector rod 45 is made of aluminum alloy or copper alloy. In order to reduce the size as much as possible, the housing 1 is provided with rivets in the direction of the oblique angle at the mounting position 15, and it is necessary to narrow the position of the moving core 43 so as not to come into contact with the rivets, thereby preventing leakage due to too close distance to the rivets.

In this embodiment, the stationary core 44 is fixed on the housing 1 through the stationary contact 42, in order to better increase the attraction force between the moving core 43 and the stationary core 44 in the electromagnetic system, a U-shaped yoke 47 is added, the yoke 47 is riveted with the stationary contact 42, when the coil 41 passes a large current, if the yoke 47 is not present, most of the magnetic field generated in the coil 41 passes through the moving core 43 and the stationary core 44 in the middle of the coil 41, but some of the magnetic field cannot pass through the moving core 43 and the stationary core 44. After the yoke 47 is added, most of the magnetic field generated in the coil 41 passes through the moving core 43 and the stationary core 44 in the middle of the coil 41, and the attraction force between the moving core 43 and the stationary core 44 increases. Therefore, under the condition of breaking the same line fault current, the force of the elastic piece 46 can be increased, the external interference is reduced, the ejector rod 45 can be pushed by the movable iron core 43 more reliably when the line faults, the mechanism is unlocked, and the line is broken.

When a short circuit fault occurs in a circuit, a large current passes through the coil 41, a large magnetic field is generated by the large current, a suction force is generated between the movable iron core 43 and the static iron core 44 by the magnetic field, the movable iron core 43 drives the ejector rod 45 on the movable iron core 43, the static iron core 44 tends to move in the direction against the reaction force of the elastic piece 46, when the ejector rod 45 moves to the right, the large lock catch 34 is pushed to rotate, the hasp surface 351 of the jump catch 35 is separated from the groove 343 surface of the large lock catch 34, the mechanism is unlocked, a product is separated, the movable contact 42 is separated, no current passes through the coil 41, and the movable iron core 43 is pushed against the shell 1 in a backward movement under the reaction force of the elastic piece 46.

In the moving process of the moving iron core 43, one narrowed end of the moving iron core 43 is always in the installation position 15 of the shell 1, and the other end of the moving iron core 43 is against the ejector rod 45 and the elastic piece 46, so that the moving iron core 43 is always balanced in the moving process, no shaking occurs, the interference to the moving process of the moving iron core 43 is reduced, and the suction force between the moving iron core 43 and the static iron core 44 is kept stable.

The electric operation module comprises a motor 21, a gear set 22 connected with the output end of the motor 21, a coupler 23 and a tripping mechanism, wherein the gear set 22 comprises a first gear 221, a second gear 222, a third gear 223 and a handle gear 224 which are positioned on the same horizontal plane, the coupler 23 is fixedly connected with a handle 31 relatively, the handle gear 224 is hinged on the coupler 23 and is provided with a gear boss 2241 which extends along the radial direction, the coupler 23 is provided with a stop dog 231 which corresponds to the gear boss 2241 and is in contact fit, the handle gear 224 is provided with a first state which drives the handle 31 to be closed by the forward rotation of the motor and the contact fit of the gear boss 2241 and the stop dog 231 when the coupler is positioned at the initial position, and is provided with a second state which returns to the initial position when the coupler 23 is positioned at the second state, the stop dog 231 is re-approaching the gear boss 2241 by the action of the tripping mechanism which drives the handle 31 to be opened when the coupler is positioned at the second state; the first gear 221, the second gear 222, the third gear 223 and the handle gear 224 are positioned on the same horizontal plane; the trip mechanism is mounted in the housing 1 and has a height below the level of the gear set 22; according to the technical scheme, the handle gear 224 is arranged on the handle 31 through the coupler 23, so that the handle gear 224 and other gears in the gear set 22 are positioned in the same horizontal plane, the motor 21 drives the handle gear 224 to rotate through the first gear 221, the second gear 222 and the third gear 223, when a product is opened, the handle gear 224 drives the handle 31 to be closed through the coupler 23, and when the product is closed, the handle gear 224 drives a mechanism on the other side to act through the tripping mechanism, so that the product is opened; the setting mode that the tripping mechanism is lower than the horizontal plane of the gear set 22 can effectively reduce the thickness dimension of the electric operating mechanism, ensure the working stability of the electric operating mechanism, and has the advantages of small occupied space and reasonable layout.

The trip mechanism comprises a trip bar 24 and a small lock catch 25 which are rotatably arranged in the shell 1, the trip bar 24 is as high as the handle gear 224, and the trip bar 24 is provided with a first deflector 241 which extends out along the radial direction and corresponds to the gear boss 2241;

The small lock catch 25 is located between the first gear 221 and the third gear 223 and below the second gear 222, the small lock catch 25 is arranged at the same height as the trip bar 24, and the trip bar 24 is provided with a second deflector rod 242 extending along the radial direction and corresponding to the small lock catch 25.

The number of teeth of the handle gear 224 is adapted to the swing range of the trip lever 24, and a third recess 243 avoiding the handle gear 224 is arranged between the first deflector rod 241 and the second deflector rod 242 on the trip lever 24; in order to enable the tooth part of the handle gear to push the coupler to drive the operation handle to be switched on in place during switching on, the tooth part of the handle gear in the embodiment does not hard collide with the trip bar in the rotating process, so that the handle gear is damaged; when the handle gear is in the second state, the tripping rod is not pushed to drive the small lock catch to trip the operating mechanism; when the handle gear is in the third state, the trip bar is pushed to drive the small lock catch to trip the operating mechanism, the operating mechanism cannot be switched on, the number of teeth of the handle gear 224 can be reduced as much as possible, and meanwhile, the trip bar 24 is provided with a recess.

A square hole 232 connected with the handle 31 through a square shaft is arranged in the center of the coupler 23; the synchronous linkage of the coupler 23 and the handle 31 is realized.

The coupler 23, the handle gear 224 and the trip bar 24 are respectively provided with a sensing magnetic steel 26; for sensing by sensors on the circuit board and then determining the respective positions of the coupler 23, handle gear 224 and trip bar 24.

When the product is opened, the motor 21 drives the handle gear 224 to rotate anticlockwise through the gear set 22, a boss on one side of the handle gear 224 props against a gear boss 2241 on one side of the coupler 23 to drive the coupler 23 to rotate anticlockwise together, a square hole 232 in the center of the coupler 23 is connected with a square hole 232 of the handle 31 on the other side through a square shaft, and the coupler 23 drives the handle 31 to rotate anticlockwise together. When the magnetic steel 26 of the coupler 23 senses the sensor at the corresponding position of the circuit board when the handle 31 rotates to the closing position, the motor 21 stops rotating and starts to rotate reversely, the handle gear 224 changes from anticlockwise rotation to clockwise rotation, when the magnetic steel 26 on the handle gear 224 senses the sensor at the corresponding position of the circuit board, the motor 21 stops rotating, the handle gear 224 stops rotating clockwise, and the handle gear 224 is at the initial position. When the chip senses that the magnetic steel 26 of the coupler 23 reaches a specified position, the product is considered to be in a closing position. At this time, the product can be switched on or off manually.

When the product is switched on, the motor 21 drives the handle gear 224 to rotate clockwise through the gear set 22, the gear boss 2241 on one side of the handle gear 224 props against the first deflector rod 241 on one side of the trip rod 24 in the trip mechanism to rotate anticlockwise, the second deflector rod 242 on the other side of the trip rod 24 pushes the small lock catch 25 in the trip mechanism to move downwards, the small lock catch 25 is linked with the large lock catch 34 on the contact support 32 on the other side through a shaft, the small lock catch 25 of the electric operating mechanism drives the large lock catch 34 of the circuit breaker mechanism to act, the mechanism on one side of the circuit breaker is unlocked, and the product is switched off. When the magnetic steel 26 on the tripping rod 24 senses the sensor at the corresponding position of the circuit board, the motor 21 stops rotating. When the product receives a lock signal, trip bar 24 needs to be stopped in the current position. At this time, the trip bar 24 props against the small lock catch 25, the small lock catch 25 props against the large lock catch 34, the large lock catch 34 and the trip catch 35 of the circuit breaker mechanism are in a separated state, and the product cannot be closed through the handle 31. When the chip senses that only the magnetic steel 26 of the trip bar 24 reaches the designated position, the product is confirmed to be in the locking position, and at the moment, the product is in the opening state and cannot be closed.

When the product receives a brake-off signal, the magnetic steel 26 on the tripping rod 24 senses a sensor at the corresponding position of the circuit board, the motor 21 stops rotating and starts to rotate reversely, the handle gear 224 changes from anticlockwise rotation to clockwise rotation, when the magnetic steel 26 on the handle gear 224 senses the sensor at the corresponding position of the circuit board, the motor 21 stops rotating, the handle gear 224 stops rotating clockwise, and the handle gear 224 is at the initial position. When the chip senses that only the magnet steel 26 of the handle gear 224 reaches the designated position, the product is considered to be in the open position. At this time, the product can be switched on or off manually.

The skilled person will know: while the invention has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the invention, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. The utility model provides an automatic divide-shut brake circuit breaker of small volume, includes circuit breaker module and electricity operating module, circuit breaker module includes shell (1), divide-shut brake mechanism, electromagnetic mechanism, hot tripping device, arc extinguishing mechanism and business turn over line board, electricity operating module can drive circuit breaker module automatic divide-shut brake, its characterized in that through remote control:

The opening and closing mechanism comprises a handle (31), a contact support (32), a movable contact (33), a large lock catch (34) and a jump button (35), wherein the contact support (32) and the handle (31) are respectively and rotatably installed in the shell (1), the large lock catch (34) and the movable contact (33) are respectively and hingedly installed on the contact support (32), the contact support (32) is provided with a third installation part (323) for installing the movable contact (34) and being positioned at the lower end, a second installation part (322) for installing the large lock catch (34) and being larger than the third installation part (323) in thickness dimension and being positioned in the middle, and a first installation part (321) for installing the jump button (35) and being positioned at the upper end, and the movable contact (33) is provided with a lug (331) which extends outwards along the radial direction and is positioned between the large lock catch (34) and the contact support (32);

The large lock catch (34) is provided with a first recess (341) facing the moving contact (33) and having a movement range of avoiding a lug (331), the jump catch (35) is hinged on the contact support (32) and is provided with a hasp surface (351) corresponding to the large lock catch (34), the upper end of the large lock catch (34) is provided with a raised line (342), and the raised line (342) is provided with a groove (343) which is downwards arranged and matched with the hasp surface (351);

The second installation part (322) is provided with a second installation column (3221) for hinging and installing the large lock catch (34), one side of the second installation column (3221) is provided with a second recess (3222), the lower side of the second recess (3222) is provided with a first boss (3223) supporting the lug (331) and in sliding fit with the lug, the third installation part (323) is provided with a fourth boss (3231) which is equal in height with the first boss (3223) and is used for installing the movable contact (33), and the second installation column (3221) is positioned in front of the swinging track of the lug (331) and forms limit fit with the lug;

The upper side of the second recess (3222) is provided with a third boss (3224), the large lock catch (34) is provided with a second mounting hole (344) hinged with the second mounting column (3221), the first recess (341) is positioned on one side of the second mounting hole (344), the other side of the second mounting hole (344) is provided with a fifth boss (345) which is in sliding fit with the third boss (3224), and the side wall of the fifth boss (345) is provided with a plurality of sixth bosses (346) which are connected with the inner wall of the second mounting hole (344) into a whole;

The left side of second sunken (3222) is equipped with second boss (3225), one side that second mounting hole (344) was kept away from to first sunken (341) is equipped with and slides complex seventh boss (347) with second boss (3225), the top of second boss (3225) is equipped with first step face (3226), the top of seventh boss (347) is equipped with second step face (348) that corresponds with first step face (3226).

2. The low-volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the shell (1) is provided with first limit bosses (11) at positions corresponding to two sides of the handle (31), and the handle (31) and the jump buckle (35) are connected in a linkage way through a U-shaped connecting rod (311).

3. The low-volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the utility model discloses a contact support structure, including shell (1), contact support (32) and shell (1), be equipped with second spacing boss (12) of corresponding contact support (32) lateral wall in shell (1), the upper end of contact support (32) is equipped with reference column (3211), shell (1) are equipped with spring installation position (13) in the top of second spacing boss (12), be equipped with reset piece (14) of contradicting two between reference column (3211) and spring installation position (13).

4. The low-volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the electromagnetic mechanism comprises a coil assembly and an iron core assembly, the coil assembly comprises a coil (41) and a fixed contact (42), the iron core assembly comprises a movable iron core (43), a fixed iron core (44) and a push rod (45), the fixed iron core (44) is fixedly connected with the fixed contact (42), an installation position (15) for sliding and installing the movable iron core (43) is arranged on the shell (1), an elastic piece (46) for abutting against the movable iron core (43) is arranged between the push rod (45) and the fixed iron core (44), one end of the push rod (45) far away from the fixed iron core (44) is in contact fit with the movable iron core (43) by utilizing the pretightening force of the elastic piece (46), the fixed iron core (44) is provided with a first through hole (441) for the push rod (45) to penetrate through, and the coil (41) is arranged on the outer circumference of the movable iron core (43) and the fixed iron core (44) in a surrounding and non-contact mode.

5. The low-volume automatic opening and closing circuit breaker of claim 4, wherein: the movable iron core (43) is provided with a mounting groove (431) for inserting one end of the ejector rod (45), the static iron core (44) is internally provided with an annular step (442) arranged around the ejector rod (45), one end of the ejector rod (45) in the mounting groove (431) is provided with an annular boss (451), and the elastic piece (46) is sleeved on the ejector rod (45) and two ends of the elastic piece respectively abut against the annular step (442) and the annular boss (451);

The static contact (42) is fixedly arranged in the shell (1), and the static contact (42) is provided with a mounting hole (421) for mounting one end of a static iron core (44);

the magnetic yoke (47) is U-shaped and is arranged in the shell (1), a second through hole (471) for the static iron core (44) to pass through is formed in the side wall of one side of the magnetic yoke (47), and an avoidance hole (472) for avoiding the movable iron core (43) and the static iron core (44) is formed in the side wall of the other side of the magnetic yoke; the movable iron core (43) is columnar and the part of the movable iron core positioned in the installation position (15) is narrowed; the ejector rod (45) is made of aluminum alloy or copper alloy.

6. The low-volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the electric operation module comprises a motor (21), a gear set (22) connected with the output end of the motor (21), a coupler (23) and a tripping mechanism, the gear set (22) comprises a first gear (221), a second gear (222), a third gear (223) and a handle gear (224), the coupler (23) is fixedly connected with a handle (31) relatively, the handle gear (224) is hinged on the coupler (23) and is provided with a gear boss (2241) extending along the radial direction, the coupler (23) is provided with a stop block (231) corresponding to the gear boss (2241) and in contact fit, the handle gear (224) is provided with a first state of switching on the handle (31) through the contact fit of the motor forward rotation and the gear boss (2241) and the stop block (231) when in an initial position, and is provided with a second state of switching on through the motor reverse rotation, and the coupler (23) is provided with a stop block (2241) when the handle gear (224) is in the second state, and the handle (31) is driven by the tripping mechanism to move to the stop block (2241) to move to the stop block.

7. The low-volume automatic opening and closing circuit breaker of claim 6, wherein: the first gear (221), the second gear (222), the third gear (223) and the handle gear (224) are positioned on the same horizontal plane; the tripping mechanism is arranged in the shell (1) and has a height lower than the horizontal plane of the gear set (22);

The tripping mechanism comprises a tripping rod (24) and a small lock catch (25) which are rotatably arranged in the shell (1), the tripping rod (24) is as high as the handle gear (224), and the tripping rod (24) is provided with a first deflector rod (241) which extends out along the radial direction and corresponds to the gear boss (2241);

The small lock catch (25) is located between the first gear (221) and the third gear (223) and below the second gear (222), the small lock catch (25) is arranged at the same height as the release rod (24), and the release rod (24) is provided with a second deflector rod (242) which extends out along the radial direction and corresponds to the small lock catch (25).

8. The low-volume automatic opening and closing circuit breaker of claim 7, wherein: the number of teeth of the handle gear (224) is adapted to the swing range of the trip bar (24), and a third recess (243) avoiding the handle gear (224) is arranged between the first deflector rod (241) and the second deflector rod (242) on the trip bar (24);

a square hole (232) connected with the handle (31) through a square shaft is formed in the center of the coupler (23);

the coupler (23), the handle gear (224) and the tripping rod (24) are respectively provided with induction magnetic steel (26).