CN113871264A

CN113871264A - Automatic opening and closing circuit breaker with small volume

Info

Publication number: CN113871264A
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: 2021-12-31
Anticipated expiration: 2041-09-30
Also published as: CN113871264B

Abstract

The invention discloses an automatic switching-on and switching-off circuit breaker with small volume, which relates to the field of circuit breakers and comprises a circuit breaker module and an electric operating module, the breaker module comprises a shell, a switching-on and switching-off mechanism, an electromagnetic mechanism, a thermal tripping mechanism, an arc extinguishing mechanism and an inlet and outlet wire plate, the electric operation module can drive the circuit breaker module to automatically switch on and off through remote control, the switch-on and switch-off mechanism comprises a handle, a contact support, a moving contact, a large lock catch and a jump buckle, the contact support and the handle are respectively and rotatably arranged in the shell, the large lock catch and the moving contact are respectively and hingedly arranged on 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 which extends outwards along the radial direction and is positioned between the large lock catch and the contact support, and one side of the large lock catch facing the moving contact is provided with a first recess which avoids the movement range of the lug. The invention has the advantages of small occupied space and reasonable layout.

Description

Automatic opening and closing circuit breaker with small volume

Technical Field

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

Background

The breaker is a switch capable of providing various protection functions, and can effectively improve the safety and reliability of electrical equipment and power lines. In order to meet the increasingly diversified demands of users, specification diversification and miniaturization of circuit breakers are a trend; the thickness direction of the opening and closing mechanism of the traditional circuit breaker at present generally needs 18mm of space to place, and the requirement of the miniaturization of the circuit breaker volume can not 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 which is small in occupied space and reasonable in layout and has a small volume.

The technical scheme adopted by the invention is as follows: the small-size automatic switching-on and switching-off circuit breaker comprises a circuit breaker module and an electric operating module, wherein the circuit breaker module comprises a shell, a switching-on and switching-off mechanism, an electromagnetic mechanism, a thermal tripping mechanism, an arc extinguishing mechanism and an incoming and outgoing line board, the electric operating module can drive the circuit breaker module to automatically switch on and off through remote control,

the divide-shut brake mechanism includes handle, contact support, moving contact, big hasp and jump and detain, contact support, handle rotate respectively and install in the shell, big hasp and moving contact are articulated respectively and are installed on the contact support, the contact support is equipped with the confession the third installation department that the moving contact installation just is located the lower extreme, supplies big hasp installation and thickness dimension are greater than the third installation department and are located the second installation department in the middle of and supply jump detain the installation and be located the first installation department of upper end, the moving contact is equipped with along radial outside extension and is located the lug between big hasp and the contact support.

One side of the large lock catch facing the moving contact is provided with a first recess avoiding the motion range of the convex piece, the jump buckle is hinged to the contact support and provided with a buckle face 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 buckle face.

The second mounting part is provided with a second mounting column for the hinged mounting of the large lock catch, one side of the second mounting column is provided with a second recess, the lower side of the second recess is provided with a first boss which supports the lug and is matched with the lug in a sliding manner, the third mounting part is provided with a fourth boss which has the same height as the first boss and is used for mounting the moving contact, the second mounting column is positioned in front of the swing track of the lug, and the second mounting column and the lug form limit matching;

a third boss is arranged on the upper side of the second recess, a second mounting hole hinged with the second mounting column is formed in the large lock catch, the first recess is located on one side of the second mounting hole, a fifth boss matched with the third boss in a sliding mode is arranged on the other side of the second mounting hole, and a plurality of sixth bosses connected with the inner wall of the second mounting hole into a whole are arranged on the side wall of the fifth boss;

the sunken left side of second is equipped with the second boss, one side that the second mounting hole was kept away from to first sunken is equipped with the seventh boss of cooperation of sliding with the second boss, the top of second boss is equipped with first step face, the top of seventh boss is equipped with the second step face that corresponds with first step face.

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

The shell is internally provided with a second limit boss corresponding to the side wall of the contact support, the upper end supported by the contact is provided with a positioning column, the shell is provided with a spring installation position above the second limit boss, and a reset piece for abutting against the second limit boss 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 an ejector rod, the fixed iron core is fixedly connected with the fixed contact, an installation position for the movable iron core to be installed in a sliding mode is arranged on the shell, an elastic piece for abutting against the movable iron core and the fixed iron core is arranged between the ejector rod and the fixed iron core, one end, far away from the fixed iron core, of the ejector rod is in contact fit with the movable iron core through the pretightening force of the elastic piece, the fixed iron core is provided with a first through hole for the ejector rod to penetrate through, and the coil is arranged on the outer circumference of the movable iron core and the fixed iron core in a surrounding and non-contact mode.

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

the static contact is fixedly arranged in the shell and provided with an installation hole for installing 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 avoidance 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, 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 shaft coupling is relatively fixedly connected with the handle, the handle gear is hinged on the shaft coupling and is provided with a gear boss extending along the radial direction, the shaft coupling is provided with a stop block which corresponds to the gear boss and is in contact fit with the gear boss, the handle gear has a first state that the handle is driven to be switched on by the positive rotation of the motor and the contact fit of the gear boss and the stop block when the handle gear is at an initial position, and the clutch has a second state that the clutch returns to the initial position through the reverse rotation of the motor during closing, and the stop block is enabled to be close to the gear boss again through the action that the clutch body drives the handle to open the brake through the tripping mechanism when the handle gear is in the second state.

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 level 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 as high as the handle gear, 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 and the trip rod are arranged at the same height, 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 matched with the swing range of the trip rod, and a third recess avoiding the handle gear is arranged between the first driving lever and the second driving lever on the trip rod;

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

and the shaft coupling, the handle gear and the trip rod are respectively provided with induction magnetic steel.

The invention has the beneficial effects that: this technical scheme is for adapting to miniature circuit breaker's demand, to the big hasp of jump knot, the overall arrangement that moving contact and contact supported is adjusted, with the moving contact centre gripping between big hasp and contact support, and what the contact supported in addition divide into first installation department, second installation department and third installation department, the three is the echelonment, the thickness dimension when the big hasp that has significantly reduced, moving contact and contact support installation, it is little to have occupation space, advantage rationally distributed.

Drawings

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

Fig. 2 is a schematic structural diagram of the switching mechanism.

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

Fig. 4 is a schematic structural view of the large lock catch.

Fig. 5 is a schematic structural diagram of a contact support, a trip and a movable contact.

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

Fig. 7 is a schematic structural diagram of the circuit breaker during closing.

Fig. 8 is a schematic diagram of the circuit breaker tripping moment.

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

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

Fig. 11 is a schematic structural diagram of a fixed contact.

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

Fig. 13 is a schematic structural diagram of the electric operating mechanism during opening.

Fig. 14 is a schematic structural view of the electric operating mechanism when closing.

Fig. 15 is a schematic structural view of the locking of the electric operating mechanism.

Fig. 16 is a schematic view showing the structure of the handle gear when it returns to the initial position.

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

Fig. 18 is a schematic structural view of a small lock catch and a large lock catch.

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

Detailed Description

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

as shown in the figure, the small-sized automatic switching breaker comprises a breaker module and an electric operating module, wherein the 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 board, the electric operating module can drive the automatic switching of the breaker module 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 catch 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 and hingedly installed on the contact support 32, the contact support 32 is provided with a third installation part 323 for supplying the moving contact 33 to be installed and located at the lower end, the large lock catch 34 is installed and is larger in thickness size than the third installation part 323 and located at the middle second installation part 322 for supplying the trip catch 35 to be installed and located at the first installation part 321 at the upper end, the movable contact 33 is provided with a convex piece 331 which extends outwards along the radial direction and is positioned between the large lock catch 34 and the contact support 32, and one side of the large lock catch 34 facing the movable contact 33 is provided with a first recess 341 which avoids the movement range of the convex piece 331; this technical scheme is in order to adapt to miniature circuit breaker's demand, to the big hasp 34 of jump ring 35, the overall arrangement of moving contact 33 and contact support 32 is adjusted, with moving contact 33 centre gripping between big hasp 34 and contact support 32, and the contact support 32 divide into first installation department 321, second installation department 322 and third installation department 323, the three is the echelonment, the big hasp 34 that has significantly reduced, the thickness dimension when moving contact 33 and contact support 32 install, and has little occupation space, advantage rationally distributed.

The jump buckle 35 is hinged on the contact support 32 and is provided with a buckle surface 351 corresponding to the large buckle 34, the upper end of the large buckle 34 is provided with a convex strip 342, and the convex strip 342 is provided with a groove 343 which is arranged downwards and is matched with the buckle surface 351; the upper end of the contact support 32 is thinned, and the jump button 35 is mounted and then connected with the contact support and the jump button by a rivet.

The second mounting portion 322 is provided with a second mounting column 3221 for the large lock catch 34 to be hinged, one side of the second mounting column 3221 is provided with a second recess 3222, the lower side of the second recess 3222 is provided with a first boss 3223 for supporting the protruding piece 331 and matching with the protruding piece in a sliding manner, the third mounting portion 323 is provided with a fourth boss 3231 which has the same height as the first boss 3223 and is used for mounting the moving contact 33, and the second mounting column 3221 is located in front of the swinging track of the protruding piece 331 and forms a limit matching with the protruding piece 331; the first boss and the fourth boss can be used for supporting the moving contact, so that the friction force generated by supporting contact with the contact can be reduced in the swinging process of the moving contact under the action of the spring force, the moving contact can stably swing horizontally and cannot swing up and down in the vertical direction; the third mounting column 3232 for mounting the moving contact on the fourth boss 37 is located below the latch, the height of the third mounting column is flush with the height of the latch, and the latch completely avoids the contact spring and the third mounting column during movement, so that the mounting position supported by the moving contact and the contact has no influence of the height of the latch, and the size of the operating mechanism is reduced. And because there is not influence of the height of the lock catch, 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.

A third boss 3224 is arranged on the upper side of the second recess 3222, the large lock catch 34 is provided with a second mounting hole 344 hinged to the second mounting column 3221, the first recess 341 is located on one side of the second mounting hole 344, a fifth boss 345 slidably fitted with the third boss 3224 is arranged on the other side of the second mounting hole 344, and a plurality of sixth bosses 346 integrally connected with the inner wall of the second mounting hole 344 are arranged on the side wall of the fifth boss 345;

a second boss 3225 is arranged at the left side of the second recess 3222, a seventh boss 347 in sliding fit with the second boss 3225 is arranged at one side of the first recess 341 away from the second mounting hole 344, a first step surface 3226 is arranged above the second boss 3225, and a second step surface 348 corresponding to the first step surface 3226 is arranged above the seventh boss 347; the second mounting hole 344 of the latch is hingedly mounted on the second mounting post 3221, the fifth boss 345 and the third boss 3224 of the latch are in contact with each other, and the seventh boss 347 and the second boss 3225 of the latch are in contact with each other, so that the thickness of the latch is reduced, the strength of the latch is ensured, and the stable mounting of the latch is ensured.

The surface of the contact support far from the second mounting column 3221 is provided with a counter bore 3227 corresponding to the position of the second mounting column, the second mounting column is internally provided with a through hole 3228, the housing is provided with a projection 19 embedded in the counter bore and a mounting shaft (not shown) inserted into the projection 19 and passing through the through hole, and under the condition that the overall thickness is limited, the strength of the contact support can be increased without increasing the thickness only by adding a recessed counter bore to the contact support.

By providing the second recess 3222 to shape the first projection 3223, the third projection 3224 and the second projection 3225, the first projection 3223, the fifth projection 345 and the second projection 3225 are narrow, and friction may be reduced when the first projection 3223 is slidably engaged with the tab 331, the second projection 3225 is slidably engaged with the seventh projection 347, and the fifth projection 345 is slidably engaged with the third projection 3224, respectively.

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

The contact structure is characterized in that a second limiting boss 12 corresponding to the side wall of the contact support 32 is arranged in the shell 1, a positioning column 3211 is arranged at the upper end of the contact support 32, a spring installation position 13 is arranged above the second limiting boss 12 of the shell 1, and a reset piece 14 abutting against the positioning column 3211 and the spring installation position 13 is arranged between the positioning column 3211 and the spring installation position 13.

When a product is in a brake-off state, the handle 31 is pushed to rotate anticlockwise, the handle 31 drives the trip buckle 35 to rotate around the rivet through the U-shaped connecting rod 311, when the buckle surface 351 of the trip buckle 35 abuts against the groove 343 of the buckle, the trip buckle 35 drives the buckle to rotate, the buckle abuts against the contact support 32, the contact support 32 is driven to rotate, the contact support 32 drives the moving contact 33 to rotate, when the side surface of the handle 31 abuts against the first limiting boss 11 rotating to the shell 1, the handle 31 stops rotating, the moving contact 33 contacts with the static contact 42, and the product is switched on.

When a short-circuit fault occurs to a line, the electromagnetic mechanism acts under the driving of the coil 41 and pushes the ejector rod 45 in the electromagnetic mechanism to move to the right, the ejector rod 45 pushes the lock catch to rotate anticlockwise, the groove 343 of the lock catch is separated from the buckle surface 351 of the jump buckle 35 when the lock catch rotates, and the mechanism is unlocked.

The contact holder 32 rotates counterclockwise under the action of the reset member 14, when the contact holder 32 abuts against the second limit boss 12 of the housing 1, the contact holder 32 stops rotating, the contact holder 32 returns to the initial position, and the latch returns to the initial position under the action of the latch reset member 58. The jump buckle 35 continues to rotate clockwise under the action of the U-shaped link 311 at the moment of disengagement from the buckle, and stops moving after rotating to the rightmost point. Then, the handle 31 drives the jump buckle 35 to rotate back through the U-shaped connecting rod 311 under the action of the reverse force of the spring of the handle 31, when the jump buckle 35 contacts with the lock catch, the jump buckle 35 overcomes the reverse force of the reset piece of the lock catch under the action of the spring of the handle 31, the buckle surface 351 of the jump buckle 35 is pressed back to the lower part of the groove 343 of the lock catch, when the side surface of the handle 31 contacts with the first limit boss 11 which rotates to the other side of the shell 1, the handle 31 stops rotating, and the handle 31 and the jump buckle 35 return to the initial position.

When the product overload fault appears, through great electric current in the bimetal, bimetal generates heat and bends right under the effect of electric current, drives the pull rod and moves right, and the pull rod drives hasp anticlockwise rotation through the rivet, and the recess 343 of hasp separates when the hasp rotates with jump buckle 35's hasp face 351, and the mechanism unblock.

The contact support 32 rotates counterclockwise under the action of the reset piece 14, when the contact support 32 abuts against the boss on the housing, the contact support 32 stops rotating, the contact support 32 returns to the initial position, and at the moment, the latch also returns to the initial position under the action of the latch reset piece; the shell 1 is provided with a latch resetting piece at a position above the latch 5, one end of the latch resetting piece abuts against the side wall of the shell, the other end of the latch resetting piece is arranged on the convex strip, the jump buckle 35 continuously rotates clockwise under the action of the U-shaped connecting rod 311 at the moment of disengaging from the latch, the latch resetting piece stops moving after rotating to the rightmost point, then the jump buckle 35 is driven by the handle 31 through the U-shaped connecting rod 311 to rotate back under the action of the reversing force of the spring of the handle 31, when the jump buckle 35 is in contact with the latch, the jump buckle 35 overcomes the counter-acting force of the latch resetting piece under the action of the spring of the handle 31, the buckle surface 351 of the jump buckle 35 is pressed back to the surface 343 of the latch, when the side surface of the handle 31 touches the boss rotating to the shell 1, the handle 31 stops rotating, and the handle 31 and the jump buckle 35 return to the initial position.

The hasp resets and adopts the torsional spring, just the hasp resets and does not set up the direction of height at the hasp, and the hasp of current circuit breaker hasp resets and all sets up the direction of height at the hasp, can make the thickness size increase like this, and this application adopts to set up the same horizontal plane position at the hasp, and sets up in hasp top position, and the effectual whole height that has reduced the mechanism has optimized structural layout.

The electromagnetic mechanism comprises a coil assembly and an iron core assembly, the coil assembly comprises a coil 41 and a static contact 42, the iron core assembly comprises a movable iron core 43, a static iron core 44 and an ejector rod 45, the static iron core 44 is fixedly connected with the static contact 42, the housing 1 is provided with an installation position 15 for the sliding installation of the movable iron core 43, an elastic piece 46 for abutting against the movable iron core 43 and the static iron core 44 is arranged between the ejector rod 45 and the static iron core 44, one end of the ejector rod 45, far away from the static iron core 44, is in contact fit with the movable iron core 43 by virtue of the pretightening force of the elastic piece 46, the static iron core 44 is provided with a first through hole 441 for the ejector rod 45 to penetrate through, and the coil 41 is arranged around the outer circumferences of the movable iron core 43 and the static iron core 44 in a non-contact manner; this technical scheme is through will move iron core 43 and slide and install in the installation position 15 of shell 1, ejector pin 45 is emboliaed to elastic component 46, and one end is contradicted through ejector pin 45 and is moved iron core 43, and one end is pressed in quiet iron core 44, and ejector pin 45 one end is with moving iron core 43 contact, and one end penetrates in quiet iron core 44 hole, will move iron core 43 through ejector pin 45 and suspend and fix in coil 41, moves iron core 43 and coil 41 contactless, has got rid of the coil 41 skeleton among the traditional electromagnetic mechanism, has reduced electromagnetic mechanism's whole volume.

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

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

The fixed contact 42 is fixedly installed in the housing 1, and the fixed iron core 44 is fixed on the housing 1 through the fixed contact 42; the static contact 42 is provided with a mounting hole 421 for mounting one end of the static iron core 44; the magnetic yoke 47 is U-shaped and is installed in the housing 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 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 installation process, the fixed iron core 44, the movable iron core 43, the elastic piece 46 and the ejector rod 45 are installed, then the whole is installed from the avoidance hole 472 of the magnetic yoke 47 until the fixed iron core 44 passes through the second through hole 471, and then the magnetic yoke 47 and the iron core assembly are installed on the shell together;

the movable iron core 43 is columnar and the part of the movable iron core located in the installation position 15 is narrowed; the ejector rod 45 is made of aluminum alloy or copper alloy. In order to achieve the effect of reducing the size as much as possible, the housing 1 is provided with rivets in the oblique angle direction of the mounting positions 15, and in order not to contact the rivets, it is necessary to narrow the position of the movable core 43 so as to prevent the electric leakage caused by too close distance to the rivets.

The fixed iron core 44 of the present embodiment is fixed on the housing 1 through the fixed contact 42, in order to better increase the attraction force between the movable iron core 43 and the fixed iron core 44 in the electromagnetic system, the U-shaped magnetic yoke 47 is added, the magnetic yoke 47 and the fixed contact 42 are riveted together, when the coil 41 passes a large current, if the magnetic yoke 47 is not present, most of the magnetic field generated in the coil 41 passes through the movable iron core 43 and the fixed iron core 44 in the middle of the coil 41, but a part of the magnetic field cannot pass through the movable iron core 43 and the fixed iron core 44. When 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 is increased. 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 plunger rod 45 can be more reliably pushed by the movable iron core 43 when the line is in fault, 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, the magnetic field generates a suction force between the movable iron core 43 and the static iron core 44, the movable iron core 43 drives the ejector rod 45 which abuts against the movable iron core 43, the static iron core 44 tends to move in the direction of overcoming the reaction force of the elastic piece 46, when the ejector rod 45 moves rightwards, the large lock catch 34 is pushed to rotate, the buckle surface 351 of the jump buckle 35 is separated from the groove 343 surface of the large lock catch 34, the mechanism is unlocked, a product is separated from a brake, the movable contact and the static contact 42 are separated, no current passes through the coil 41, and the movable iron core 43 moves backwards under the reaction force of the elastic piece 46 and abuts against the shell 1.

In the process of moving the movable iron core 43, the narrowed end of the movable iron core 43 is always in the installation position 15 of the housing 1, and the other end of the movable iron core 43 is against the ejector rod 45 and the elastic piece 46, so that the movable iron core 43 is always kept balanced in the moving process, no shaking occurs, the interference to the moving process of the movable iron core 43 is reduced, and the suction force between the movable 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, the gear set 22 includes a first gear 221, a second gear 222, a third gear 223 and a handle gear 224 at the same level, the coupler 23 is relatively fixedly connected with the handle 31, 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 which corresponds to and is in contact fit with the gear boss 2241, the handle gear 224 has a first state that the handle 31 is closed by the forward rotation of the motor and the contact cooperation of the gear boss 2241 and the stopper 231 when the handle gear is at the initial position, and a second state that the motor reversely rotates to return to the initial position when the switch is closed, the coupling 23 drives the handle 31 to open through the tripping mechanism when the handle gear 34 is in the second state, so that the stop block 231 approaches the gear boss 2241 again; the first gear 221, the second gear 222, the third gear 223 and the handle gear 224 are located on the same horizontal plane; the tripping mechanism is arranged in the shell 1 and the height of the tripping mechanism is lower than the horizontal level of the gear set 22; according to the technical scheme, the handle gear 224 is mounted on the handle 31 through the coupler 23, so that the handle gear 224 and other gears in the gear set 22 are located 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 switched off, the handle gear 224 drives the handle 31 to be switched on through the coupler 23, and when the product is switched on, the handle gear 224 drives the mechanism on the other side to act through the tripping mechanism, so that the product is switched off; and the setting mode that tripping device is less than the horizontal plane of gear train 22, can effectual reduction electric operating mechanism's thickness size, guaranteed electric operating mechanism's job stabilization nature again, have occupation space less, advantage rationally distributed.

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 driving lever 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 rod 24, and the trip rod 24 is provided with a second driving lever 242 which extends out in the radial direction and corresponds 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 shift lever 241 and the second shift lever 242 on the trip lever 24; the tooth part of the handle gear in the embodiment can push the coupler to drive the operating handle to be switched on in place during switching on, and the tooth part of the handle gear cannot collide with the trip rod during the rotation process to cause damage to the handle gear; when the handle gear is in the second state, the handle gear cannot push the tripping rod to drive the small lock catch to trip the operating mechanism; when the handle gear is still 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 only be reduced as much as possible, and the trip bar 24 is provided with a recess.

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

The shaft coupling 23, the handle gear 224 and the trip rod 24 are respectively provided with induction 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, the boss on one side of the handle gear 224 abuts against the gear boss 2241 on one side of the coupler 23 to drive the coupler 23 to rotate anticlockwise together, the square hole 232 at the center of the coupler 23 is connected with the square hole 232 of the handle 31 on the other side through the square shaft, and the coupler 23 drives the handle 31 to rotate anticlockwise together. When the handle 31 rotates to the switching-on position, the magnetic steel 26 of the coupler 23 senses the sensor at the corresponding position of the circuit board, the motor 21 stops rotating and starts to rotate reversely, the handle gear 224 rotates clockwise from the counterclockwise 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 the designated position, the product is considered to be in the switching-on position. At the moment, the product can be manually switched on and off.

When a 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 abuts against the first driving lever 241 on one side of the tripping rod 24 in the tripping mechanism to rotate anticlockwise, the second driving lever 242 on the other side of the tripping rod 24 pushes the small lock catch 25 in the tripping 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 operation 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 trip bar 24 senses the sensor at the corresponding position of the circuit board, the motor 21 stops rotating. When the product receives a lock signal, the trip bar 24 needs to stop at the current position. At this time, the trip bar 24 abuts against the small latch 25, the small latch 25 abuts against the large latch 34, the large latch 34 and the trip 35 of the circuit breaker mechanism are in a separated state, and the product cannot be switched on through the handle 31. When the chip only senses that the magnetic steel 26 of the trip rod 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, when the magnetic steel 26 on the trip rod 24 senses the 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 counterclockwise 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 clockwise rotation, and the handle gear 224 is at the initial position. When the chip senses that only the magnetic steel 26 of the handle gear 224 reaches the designated position, the product is considered to be in the opening position. At the moment, the product can be manually switched on and off.

The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims

1. The utility model provides a little volume's automatic divide-shut brake circuit breaker, includes circuit breaker module and electrical operation module, circuit breaker module includes shell (1), divide-shut brake mechanism, electromagnetic mechanism, thermal trip mechanism, arc extinguishing mechanism and business turn over line board, electrical operation module can drive the automatic divide-shut brake of circuit breaker module through remote control, its characterized in that:

the opening and closing mechanism comprises a handle (31), a contact support (32), a moving contact (33), a large lock catch (34) and a trip catch (35), wherein 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 installed on the contact support (32) in a hinged mode, the contact support (32) is provided with a third installation part (323) for the moving contact (33) to be installed and located at the lower end, a second installation part (322) for the large lock catch (34) to be installed and located in the middle and a first installation part (321) for the trip catch (35) to be installed and located at the upper end, and the moving contact (33) is provided with a lug (331) which extends outwards in the radial direction and is located between the large lock catch (34) and the contact support (32).

2. The small volume automatic opening and closing circuit breaker according to claim 1, characterized in that: big hasp (34) are equipped with the first sunken (341) of dodging lug (331) motion range towards one side of moving contact (33), jump and detain (35) articulated the installation on contact support (32), and it is equipped with hasp face (351) that correspond big hasp (34), big hasp (34) upper end is equipped with sand grip (342), sand grip (342) are equipped with down set up and with hasp face (351) complex recess (343).

3. The small volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the second mounting part (322) is provided with a second mounting column (3221) for the large lock catch (34) to be hinged, one side of the second mounting column (3221) is provided with a second recess (3222), the lower side of the second recess (3222) is provided with a first boss (3223) which supports the lug (331) and is matched with the lug in a sliding manner, the third mounting part (323) is provided with a fourth boss (3231) which has the same height as the first boss (3223) and is used for mounting the moving contact (33), and the second mounting column (3221) is positioned in front of the swinging track of the lug (331) and forms limit matching with the first boss (3223);

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

a second boss (3225) is arranged on the left side of the second recess (3222), a seventh boss (347) in sliding fit with the second boss (3225) is arranged on one side, away from the second mounting hole (344), of the first recess (341), a first step surface (3226) is arranged above the second boss (3225), and a second step surface (348) corresponding to the first step surface (3226) is arranged above the seventh boss (347).

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

5. The small volume automatic opening and closing circuit breaker according to claim 1, characterized in that: be equipped with second spacing boss (12) that correspond contact support (32) lateral wall in shell (1), the upper end that contact supported (32) is equipped with reference column (3211), shell (1) is equipped with spring installation position (13) in the top of second spacing boss (12), be equipped with between reference column (3211) and the spring installation position (13) and contradict reset piece (14) of the two.

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

7. The small volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the movable iron core (43) is provided with a mounting groove (431) for inserting one end of a push rod (45), an annular step (442) arranged around the push rod (45) is arranged in the static iron core (44), one end of the push rod (45) in the mounting groove (431) is provided with an annular boss (451), the elastic piece (46) is sleeved on the push 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 an installation hole (421) for installing one end of a static iron core (44);

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

8. The small volume automatic opening and closing circuit breaker according to claim 1, characterized in that: the electric operating 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), the coupler (23) is fixedly connected with a handle (31) relatively, the handle gear (224) is installed on the coupler (23) in a hinged mode and is provided with a gear boss (2241) extending out along the radial direction, the coupler (23) is provided with a stop block (231) corresponding to and in contact fit with the gear boss (2241), the handle gear (224) has a first state of driving the handle (31) to be switched on through forward rotation of the motor and contact fit of the gear boss (2241) and the stop block (231) when being at an initial position, and has a second state of returning to the initial position through reverse rotation of the motor when being switched on, when the handle gear (34) is in the second state, the coupler (23) drives the handle (31) to open through the tripping mechanism, so that the stop block (231) approaches the gear boss (2241) again.

9. The small volume automatic opening and closing circuit breaker according to claim 8, characterized in that: 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 the height of the tripping mechanism is lower than the horizontal level 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 driving lever (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 located below the second gear (222), the small lock catch (25) and the trip rod (24) are arranged at the same height, and the trip rod (24) is provided with a second driving lever (242) which extends out in the radial direction and corresponds to the small lock catch (25).

10. The small volume automatic opening and closing circuit breaker according to claim 9, characterized in that: the number of teeth of the handle gear (224) is matched with the swing range of the trip rod (24), and a third recess (243) avoiding the handle gear (224) is arranged between the first driving lever (241) and the second driving lever (242) on the trip rod (24);

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

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