CN214313096U - Small-sized circuit breaker - Google Patents

Abstract

The utility model provides a miniature circuit breaker, includes the casing be equipped with handle, operating device in the casing and be used for driving the automatic actuating mechanism who divides the closing of circuit breaker, the handle is connected with operating device, actuating device linkage respectively, operating device includes hasp complex jump and detains and the hasp still be equipped with separating brake mechanism between handle and the operating device, separating brake mechanism is including setting up separating brake portion on actuating device, rotating the separating brake push rod of assembly in the casing and setting up the trigger part on the hasp, and when actuating device carried out the separating brake and rotates, separating brake push rod was under the drive of separating brake portion to the trigger part application of force, made hasp and jump and detain the unblock and then made operating device action, circuit breaker separating brake. The utility model has the advantages of simple structure, occupation space are few and the assembly is convenient, do benefit to the miniaturized design of circuit breaker.

Description

Small-sized circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus, concretely relates to miniature circuit breaker.

Background

A circuit breaker is a commonly used switching device capable of closing, carrying, and opening a current under a normal circuit condition, and closing, carrying, and opening a current under an abnormal circuit condition within a prescribed time. The existing circuit breaker has the function of automatic switching-on and switching-off, the function of automatic switching-on is realized by the rotation of a motor drive gear drive handle, the function of automatic switching-off is realized by the hasp that a motor drives a gear to push an operating mechanism, but because the gear is far away from the hasp, a complex and fussy linkage structure can be generally arranged between the gear and the hasp, so not only the assembly difficulty is increased, but also too much internal space is occupied, and the miniaturization design of the circuit breaker is not facilitated.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, miniature circuit breaker that the reliability is high.

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

the utility model provides a miniature circuit breaker, includes the casing be equipped with handle, operating device in the casing and be used for driving the automatic actuating mechanism who divides the closing of circuit breaker, the handle is connected with operating device, actuating device linkage respectively, operating device includes hasp complex jump and detains and the hasp still be equipped with separating brake mechanism between handle and the operating device, separating brake mechanism is including setting up separating brake portion on actuating device, rotating the separating brake push rod of assembly in the casing and setting up the trigger part on the hasp, and when actuating device carried out the separating brake and rotates, separating brake push rod was under the drive of separating brake portion to the trigger part application of force, made hasp and jump and detain the unblock and then made operating device action, circuit breaker separating brake.

Further, after the breaker is opened, the transmission mechanism rotates towards the closing direction, and the opening push rod and the opening part rotate back to the original position; when the transmission mechanism performs closing rotation, the transmission mechanism rotates towards the closing direction and drives the handle to rotate towards the closing direction, and the handle drives the operating mechanism to act to close the circuit breaker; after the breaker is switched on, the transmission mechanism rotates towards the switching-off direction, and the switching-off push rod and the switching-off part are both located at the original positions.

Furthermore, the brake separating mechanism also comprises an elastic piece, the elastic piece provides elastic force for the brake separating push rod, and the elastic force is used for enabling the brake separating push rod to rotate back to the original position after the brake separating is finished.

Further, the separating brake mechanism further comprises an elastic piece, the elastic piece provides elastic force for the separating brake push rod, and the elastic force is used for enabling the separating brake push rod to be always kept abutting against the separating brake part.

Further, the elastic component is the torsional spring, and the middle part assembly of torsional spring is in the casing, and the first elastic arm of torsional spring supports in the casing, and the terminal bending type of the second elastic arm of torsional spring supports and leans on the portion, support and lean on the lateral wall cooperation of portion and separating brake push rod.

Further, the body of rod of separating brake push rod is equipped with the breach, the breach face of breach is used for leaning on with separating brake portion, and the body of rod side of the separating brake push rod of breach is as spacing face dorsad for be connected with the one end cooperation of elastic component, be equipped with on separating brake push rod to be used for to the push face of the trigger part application of force of hasp, push face sets up at the tip of separating brake push rod or is close to the region of tip.

Furthermore, the middle part of the lock catch is rotatably assembled on a tripping lever of the operating mechanism, a buckle arm and a trigger arm are respectively arranged at two ends of the lock catch, the end face of the buckle arm is designed into a buckle face used for being matched with one end of the jump buckle to form a buckle structure, a trigger face is arranged at the end part of the trigger arm, and the brake separating push rod enables the lock catch and the jump buckle to be unlocked by applying force to the trigger face.

Further, drive mechanism includes motor-drive system and gear train, motor-drive system is used for driving the gear train and carries out combined floodgate or separating brake and rotate, the gear train includes first gear and second gear at least, first gear is used for being connected with the handle linkage, is equipped with the separating brake portion that promotes the separating brake push rod on the second gear.

Furthermore, the first gear is meshed with the second gear, the first gear and the handle are coaxially mounted, a linkage structure is arranged between the first gear and the handle, the handle is driven by the transmission mechanism to perform closing rotation, and a boss serving as a switching-off part is arranged on one surface, facing the operating mechanism, of the second gear.

Further, be provided with the baffle in the casing be equipped with on the baffle and dodge the groove, drive mechanism assembles in the casing of baffle back one side, and operating device and separating brake mechanism assemble in the casing of the positive one side of baffle, and separating brake portion passes and dodges the groove and cooperate with the separating brake push rod.

The utility model discloses a miniature circuit breaker sets up separating brake mechanism between handle and operating device, and separating brake portion and the portion of triggering of separating brake mechanism set up respectively on drive mechanism and hasp, only the separating brake push rod sets up between handle and operating device to the separating brake push rod utilizes the clearance setting in the casing, has simple structure, occupation space is few and assemble convenient advantage, does benefit to the miniaturized design of circuit breaker.

In addition, the opening mechanism further comprises an elastic piece, the elastic piece is connected with the opening push rod, the elastic piece provides elastic resetting force for rotating to the original position for the opening push rod, the opening push rod and the opening part are always kept in a fit state, and all parts of the opening mechanism have higher coordination and coordination.

In addition, the opening push rod is provided with a notch matched with the opening part, so that the matching stability of the opening push rod and the opening part is improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of the first embodiment of the present invention in a closing state;

fig. 3 is a schematic structural diagram of the first embodiment of the present invention in the open state;

fig. 4 is a schematic structural diagram (closing state) of the original position of the opening mechanism according to the first embodiment of the present invention;

fig. 5 is a schematic structural view (critical position) of the first embodiment of the present invention after the opening mechanism is completely opened;

fig. 6 is a schematic structural view of the original position of the opening mechanism according to the first embodiment of the present invention (opening state);

fig. 7 is a schematic structural diagram (critical state) of the switching-off mechanism after the first embodiment of the present invention completes switching-on;

fig. 8 is a schematic structural view of the latch according to the first embodiment of the present invention;

fig. 9 is a schematic structural view of a separator in a first embodiment of the present invention;

fig. 10 is a schematic structural view of a second embodiment of the present invention;

fig. 11 is a schematic structural view of the original position of the opening mechanism according to the second embodiment of the present invention (opening state);

fig. 12 is a schematic structural view of a critical state of the opening mechanism according to the second embodiment of the present invention (opening state);

fig. 13 is a schematic structural diagram (closing) of a critical state of the opening mechanism according to the second embodiment of the present invention;

fig. 14 is a schematic structural view of a trip lever, a buckle and a jump buckle according to a second embodiment of the present invention;

fig. 15 is a schematic structural view of a trigger shaft according to a second embodiment of the present invention;

fig. 16 is a schematic structural view of a brake-separating push rod according to a second embodiment of the present invention;

fig. 17 is a schematic structural view of a second gear according to a second embodiment of the present invention;

fig. 18 is a schematic structural view of a separator according to a second embodiment of the present invention.

Detailed Description

The following describes a detailed embodiment of a miniature circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 18. The present invention is not limited to the description of the following embodiments.

The utility model provides a miniature circuit breaker, includes the casing be equipped with handle 1, operating device 3, contact mechanism in the casing and be used for driving the automatic actuating mechanism 2 that closes the floodgate of circuit breaker, handle 1 is connected with operating device 3, the linkage of actuating mechanism 2 respectively, operating device 3 includes trip lever 31, hasp 32 and jump knot 33, trip lever 31 pivot assembly is in the casing, and contact mechanism's moving contact passes through the contact and supports and contact spring assembly on trip lever 31, jump knot 33 rotates the assembly on trip lever 31 with hasp 32, and when jump knot 33 and hasp 32 hasp cooperation formed the hasp structure, the circuit breaker closed, and the hasp structure unblock at jump knot 33 and hasp 32, circuit breaker separating brake.

In this application, the action principle that the circuit breaker realizes automatic switching-on is the same with the action principle that the existing circuit breaker automatically switches on, namely, the transmission mechanism 2 drives the handle 1 to carry out switching-on rotation, and the operating mechanism 3 is driven under the linkage effect of the handle 1, so that the contact mechanism is switched on.

The improvement point of this application lies in the automatic separating brake of circuit breaker be equipped with separating brake mechanism between handle 1 and operating device 3, separating brake mechanism is including setting up separating brake portion 211 on drive mechanism 2, rotating the separating brake push rod 4 of assembly in the casing and setting up the trigger structure on hasp 32. The separating brake part 211 and the trigger structure of the separating brake mechanism are respectively arranged on the transmission mechanism 2 and the lock catch 32, the separating brake part 211 and the trigger structure realize the separating brake action through the separating brake push rod 4 assembled on the shell, and the separating brake push rod 4 utilizes the gap between the handle 1 and the operating mechanism 3 to be arranged, so that the separating brake mechanism has the advantages of simple structure and less occupied space compared with the existing complex linkage mechanism.

When the transmission mechanism 2 performs opening rotation, the opening push rod 4 applies force to the trigger structure under the driving of the opening part 211, so that the lock catch 32 and the trip catch 33 are unlocked, and the operation mechanism 3 acts to open the circuit breaker; after the circuit breaker is opened, the transmission mechanism 2 rotates towards the closing direction, and the opening push rod 4 and the opening part 211 rotate to the original position; after the switching-off push rod 4 and the switching-off part 211 recover the original positions, the transmission mechanism 2 continues to rotate towards the switching-on direction and drives the handle 1 to rotate towards the switching-on direction, the handle 1 drives the operating mechanism 3 to act to switch on the circuit breaker, at this time, the switching-off part 211 is separated from the switching-off push rod 4, or the switching-off part 211 does not apply thrust to the switching-off push rod 4, and only the switching-off part 211 and the switching-off push rod 4 are attached together; after the circuit breaker is closed, the transmission mechanism 2 rotates in the opening direction, the opening part 211 rotates back to the original position, and the opening push rod 4 and the opening part 211 are matched with each other to prepare for the next opening operation.

The transmission mechanism 2 comprises a motor driving system and a gear set, the motor driving system comprises a motor and a worm, and the worm is meshed and connected between the motor and the gear set and is used for driving the gear set to perform switching-on or switching-off rotation; the gear set at least comprises a first gear and a second gear 21 which are connected in a meshed mode, the first gear is used for being connected with the handle 1 in a linkage mode, the first gear and the handle 1 are coaxially installed, a linkage structure is arranged between the first gear and the handle 1, the first gear drives the handle 1 to rotate in a closing mode through the linkage structure in the process that the transmission mechanism 2 rotates in a closing mode, generally, protruding boss structures are arranged on the first gear and the handle 1, when the boss structures of the first gear and the boss structures of the handle 1 are matched, the first gear can drive the handle 1 to rotate in the closing direction, when the transmission mechanism 2 rotates in an opening mode, the linkage structure of the first gear and the handle 1 is broken down, and opening motion of the handle 1 is achieved through driving of the operating mechanism 3. The second gear 21 is provided with a brake separating part 211 for triggering the brake separating push rod 4 to rotate, and the brake separating part 211 is preferably a boss arranged on the second gear 21, and the boss is positioned on one surface of the second gear 21 facing the operating mechanism 3.

The opening push rod 4 is rotatably assembled in the shell, the rotating assembly position of the opening push rod 4 can be the end of the opening push rod 4, and also can be the middle of the rod body of the opening push rod 4, the transmission mechanism 2 drives the opening part 211 to move towards the opening direction, the opening part 211 pushes the opening push rod 4 to rotate, one end of the opening push rod 4 applies force to the trigger structure on the lock catch 32, so that the lock catch 32 and the jump catch 33 form a hasp structure for unlocking, wherein the trigger structure arranged on the lock catch 32 is based on pushing the lock catch 32 to rotate, the trigger structure can be specifically an integrally formed protruding structure on the lock catch 32, and can also be a structure independently arranged on the lock catch 32, in addition, the optimal position of the trigger structure is the part of the lock catch 32 closest to the opening push rod 4, and the space occupied by the opening mechanism in the shell is further reduced. The shape of the rod body of the opening push rod 4 is based on reasonably utilizing the gap between the operating mechanism 3 and the handle 1, and the specific shape of the opening push rod 4 can be selected in various ways, for example, the rod body of the opening push rod 4 adopts a linear rod body or a rod body structure with irregular shapes such as a bent part.

Preferably, the separating brake mechanism further comprises an elastic part 5, one end of the elastic part 5 is fixed in the shell, the other end of the elastic part 5 is connected with the separating brake push rod 4, the elastic part 5 is elastic force provided by the separating brake push rod 4 and can be used as elastic restoring force to enable the separating brake push rod 4 to rotate back to an original position after the separating brake action is completed, the elastic force provided by the elastic part 5 can also play a limiting role, and the separating brake push rod 4 is prevented from generating displacement which is not beneficial to the work of the circuit breaker. Certainly, the opening mechanism may not be provided with the elastic element 5, and after the opening push rod 4 completes the opening action, the opening push rod 4 can be restored to the original position under the cooperation of other structures of the shell, but the restoring effect is not as quick and effective as the elastic element 5.

Further, preferably, a partition plate 6 is arranged in the housing, the transmission mechanism 2 is arranged on one side of the back surface of the partition plate 6, the handle 1, the operating mechanism 3, the opening mechanism and the contact mechanism of the circuit breaker are arranged on one side of the front surface of the partition plate 6, in addition, an avoiding groove 61 is formed in the area, corresponding to the opening part 211, of the partition plate 6, and the shape of the avoiding groove 61 is preferably the same as the rotation track of the opening part 211.

In a first embodiment, a miniature circuit breaker is provided with reference to fig. 1-9, the space in the housing is divided into two parts by a partition 6, a transmission mechanism 2 is arranged on the back side of the partition 6, and a handle 1, an operating mechanism 3 and a tripping mechanism are arranged on the front side of the partition 6. In this embodiment, the separating brake mechanism includes separating brake portion 211, separating brake push rod 4, elastic component 5 and the trigger portion 323 of setting on hasp 32, and wherein separating brake portion 211 is the boss of setting on second gear 21, and separating brake push rod 4 rotates the assembly on baffle 6 separating brake push rod 4's body of rod one side is equipped with breach 41, the breach face of breach 41 is used for leaning on the cooperation with separating brake portion 211, is equipped with the promotion face that is used for to the trigger structure application of hasp 32 on separating brake push rod 4, the preferred region that sets up at the tip of separating brake push rod 4 or be close to the tip of promotion face, the promotion face can be directly with hasp 32 contact before promoting hasp 32 to rotate, also can with the hasp 32 between leave certain clearance, avoid the mistake to trigger hasp 32.

The elastic piece 5 is connected with the opening push rod 4 and used for providing elasticity for the opening push rod 4, the elastic piece 5 is matched with a limiting surface of the opening push rod 4, the limiting surface is the side surface of the opening push rod 4, back to the notch 41, of the rod body, after the opening push rod 4 completes opening action, the elasticity of the elastic piece 5 serves as reset force of the opening push rod 4 to enable the opening push rod 4 to rotate back to an original position, in addition, the elasticity of the elastic piece 5 has another two functions, one of the functions is that the opening push rod 4 and the opening part 211 are always kept abutted, and poor matching caused by separation of the opening push rod 4 and the opening part 211 is avoided; secondly, make the body of rod of separating brake push rod 4 laminate baffle 6, prevent to produce unnecessary displacement, disturb the normal work of separating brake mechanism.

Combine fig. 2 and 5 to provide the structure of the separating brake push rod 4 of this embodiment, the body of rod of separating brake push rod 4 is the straight line form, and the installation is rotated to the one end of separating brake push rod 4, and the rotation mounted position of separating brake push rod 4 sets up the one end tip at separating brake push rod 4, makes separating brake push rod 4 only have one carry out wobbling tip in the casing space, does benefit to the rotation orbit that reduces separating brake push rod 4 and adopts shorter separating brake push rod 4, helps reducing the space that separating brake push rod 4 occupy in the casing. The breach 41 sets up in the body of rod middle part of separating brake push rod 4, and breach 41 extends to the other end tip of separating brake push rod 4, and breach 41 forms the stair structure with the other end connection of separating brake push rod 4 this moment, the stair structure includes first terminal surface, second terminal surface and connects the face of being connected between first terminal surface and second terminal surface, and the breach face comprises first terminal surface and connection face, and separating brake portion 211 offsets with the breach face and leans on, and the body of rod side of breach face one side is as spacing face dorsad for be connected with elastic component 5, the second terminal surface is close to the regional face of pushing away as of spacing face, and the trigger structure for promoting hasp 32 makes hasp 32 take place to rotate, thereby breaks away hasp structure of hasp 32 and jump buckle 33.

The preferred scheme of the elastic member 5 of this embodiment is provided, as shown in fig. 1-7, the elastic member 5 is a torsion spring, the middle part of the torsion spring is assembled on a fixed boss on the partition plate 6, the first elastic arm of the torsion spring is fixedly supported in the casing, the end of the second elastic arm of the torsion spring is bent to form a supporting part, the supporting part is supported against the spacing surface of the opening push rod 4, and the torsion spring is supported against the opening push rod 4 with the opening part 211 all the time under the action of elastic deformation.

Providing a specific structure of the latch 32 of this embodiment, as shown in fig. 8, a middle portion of the latch 32 is rotatably assembled on the trip lever 31 of the operating mechanism 3, two ends of the latch 32 are respectively provided with a latch arm 321 and a trigger arm 322, the latch arm 321 and the trigger arm 322 are both curved arms bending to one side, and an end surface of the latch arm 321 is provided with a latch surface for forming a latch structure in cooperation with one end of the jumper 33; the end part of the trigger arm 322 forms an obtuse circular trigger part 323 with a large diameter, the side surface of the trigger part 323 serves as a trigger surface and is used for being matched with the pushing surface of the brake-separating push rod 4, and the obtuse circular trigger part 323 is beneficial to increasing the matching area of the trigger surface and the pushing surface and is beneficial to the matching stability of the trigger surface and the pushing surface. Under the pushing of the opening part 211, the pushing surface of the opening push rod 4 contacts with the triggering surface and applies force to the triggering surface to rotate the lock catch 32, so that the lock catch 32 and the jump catch 33 are unlocked, and the operating mechanism 3 drives the contact mechanism to open.

The working process is described in detail with reference to the figures:

opening operation: when the circuit breaker is in a closing state, the opening part 211 and the opening push rod 4 are located at original positions, taking fig. 4 and 5 as examples, a pushing surface of the opening push rod 4 abuts against a triggering surface of the latch 32, the opening part 211 pushes the opening push rod 4 to rotate along with the opening rotation of the transmission mechanism 2, the opening part 211 rotates clockwise in fig. 4, the upper end of the opening push rod 4 is rotatably assembled, the lower end of the opening push rod 4 rotates under the action of the opening part 211, the pushing surface applies downward pushing force to the triggering surface of the latch 32 at the moment, the latch 32 rotates under the pushing force, the latching surface of the latch 32 and one end of the trip 33 are staggered, the latch 32 is unlocked with a latch structure of the trip 33, and the operation mechanism 3 acts to drive the contact mechanism to open; after the circuit breaker is opened, the position of the opening mechanism is as shown in fig. 5, the transmission mechanism 2 rotates towards the closing direction, the opening part 211 and the opening push rod 4 also rotate until the initial position is recovered under the action of the elastic element 5, the rotation direction of the opening part 211 in the figure is counterclockwise, and the circuit breaker is in the opening state at this time.

Closing action: when the circuit breaker is in the opening state, the opening mechanism is already at the original position as shown in fig. 6, the transmission mechanism 2 continues to rotate towards the closing direction, the opening part 211 rotates along with the transmission mechanism 2, the rotation direction of the opening part 211 in the figure is the counterclockwise direction, the opening push rod 4 is driven to keep contact with the opening part 211 under the action of the elastic piece 5, the opening part 211 does not apply thrust to the opening push rod 4 at this time, the opening push rod and the opening push rod are only in the joint state, and the opening mechanism is at the position (see fig. 7); because the first gear of the transmission mechanism 2 is linked with the handle 1, the handle 1 rotates towards the closing direction, and the operating mechanism 3 drives the contact mechanism to complete the closing action under the linkage action of the handle 1, after the circuit breaker is closed, the transmission mechanism 2 rotates towards the opening direction, the opening part 211 rotates back to the original position, and the pushing surface of the opening push rod 4 contacts with the triggering surface of the lock catch 32.

In conjunction with fig. 10-18, a second embodiment is provided, in which a handle 1, an operating mechanism 3, a switching-off mechanism and a transmission mechanism 2 are disposed in a housing of the circuit breaker, the switching-off mechanism includes a switching-off portion 211, a switching-off push rod 4, an elastic member 5 and a trigger shaft 324 disposed on a latch 32, wherein the switching-off portion 211 is a boss disposed on the second gear 21; the middle part of separating brake push rod 4 rotates the assembly on baffle 6, is equipped with in separating brake push rod 4 one end be used for with separating brake portion 211 complex cooperation structure, the preferred convex cooperation boss 421 of cooperation structure, the region that is close to the tip at the other end of separating brake push rod 4 is equipped with the push surface, the push surface is used for promoting the trigger shaft 324 of setting on hasp 32, and separating brake push rod 4 adopts the mode of middle part rotation assembly, does benefit to the turned angle who reduces separating brake push rod 4, reduces the too big interference that causes other parts in the casing of the amplitude of oscillation of separating brake push rod 4. The middle part of the lock catch 32 is rotatably assembled on the trip lever 31, and the triggering shaft 324 is used as a triggering structure of the brake-separating push rod 4 and is preferably arranged at the area of the lock catch 32 close to the brake-separating push rod 4. One end of the elastic piece 5 is fixed in the shell, the other end of the elastic piece 5 is connected with the opening push rod 4, and the elastic force provided by the elastic piece 5 is used as elastic reset force to enable the opening push rod 4 to rotate back to the original position.

Preferably, a partition plate 6 (see fig. 18) is also provided in the present embodiment, and as in the first embodiment, the transmission mechanism 2 is provided on the back side of the partition plate 6, and the handle 1, the operating mechanism 3, and the opening mechanism are provided on the front side of the partition plate 6, and unlike the first embodiment, the height of the opening/closing portion 211 is low in the present embodiment, and does not interfere with the partition plate 6 when the opening/closing operation is performed, so that the avoiding groove 61 may not be provided in the partition plate 6. Of course, when the avoiding groove 61 for communicating the opening part 211 with the opening push rod 4 is provided on the partition plate 6, the shape and size of the avoiding groove 61 may not be completely the same as those of the avoiding groove 61 in the first embodiment, and the avoiding groove 61 only needs to enable the opening part 211 and the opening push rod 4 to be in contact fit when opening. In addition, a limiting structure 62 is further arranged on one side of the front face of the partition plate 6, the limiting structure 62 is preferably a support column which is arranged in a protruding mode, the side face of the rod body of the opening push rod 4 is matched with the limiting structure 62 and used for limiting the swing range of the opening push rod 4, and under the action of the elastic piece 5, when the opening push rod 4 does not perform opening action, the opening push rod 4 is always in contact fit with the limiting structure 62, and the opening push rod 4 is prevented from interfering with normal closing of the operating mechanism 3.

The structure of the brake separating push rod 4 of this embodiment is provided with reference to fig. 10-13 and 16, the whole brake separating push rod 4 is a rod structure, the brake separating push rod 4 includes a first inclined section 42, a second inclined section 43 and a flat section 44 which are integrally formed, the first inclined section 42 and the second inclined section 43 are connected through one end to form a V-shaped structure, a rotating shaft is arranged at the joint of the first inclined section 42 and the second inclined section 43, the rotating shaft rotatably mounts the brake separating push rod 4 on the partition board 6, a matching boss 421 is arranged at the other end of the first inclined section 42, the matching boss 421 is formed by protruding the rod side surface of the brake separating push rod 4, the matching boss 421 protrudes towards the partition board 6 in fig. 16, the matching boss 421 can pass through the avoiding groove 61 on the partition board 6 to match with the brake separating portion 211, one side surface of the matching boss 421 serves as a matching surface to match with the brake separating portion 211, and the other end of the second inclined section 43 is connected with one end of the flat section 44, the other end of the straight section 44 is provided with a pushing surface for pushing the trigger shaft 324, preferably, the pushing surface is located in the area close to the end of one side surface of the straight section 44; one side of straight section 44 is as spacing face, spacing face is located two relative sides with the promotion face, spacing face and the limit structure 62 of setting on baffle 6 laminate mutually and are used for restricting separating brake push rod 4 and continue to rotate, spacing face is the side of going up of straight section 44 in fig. 16, and spacing face laminates spacingly mutually with the support column as limit structure 62 under the elastic force effect of elastic component 5, prevents that separating brake push rod 4 is too big at casing internal oscillation range, disturbs other mechanisms in the casing. Preferably, the elastic member 5 of this embodiment is preferably a tension spring, one end of the tension spring is fixed in the housing, and the other end of the tension spring is connected with the opening push rod 4, and preferably, a connection hole 422 is provided on the first inclined section 42, and the connection hole 422 is used for being connected with the other end of the tension spring.

In conjunction with fig. 10-15, a structure of the latch 32 of the present embodiment is provided, in which a middle portion of the latch 32 is rotatably mounted on the trip lever 31 of the operating mechanism 3, a latch arm 321 is convexly provided at one end of the latch 32, a latch surface for cooperating with the trip 33 is provided at an end portion of the latch arm 321, the latch arm 321 is provided with a mounting hole 325, and a trigger shaft 324 is mounted in the mounting hole 325, as shown in fig. 14, preferably, two parallel and opposite latch arms 321 are provided at one end of the latch 32, the two latch arms 321 are of a bent structure, so that the latch 32 is integrally formed as a double-hook-shaped latch 32, a gap for inserting the trip lever 31 is left between the two latch arms 321, a through hole 311 is provided in the middle portion of the trip lever 31, the trigger shaft 324 passes through the through hole 311 of the trip lever 31 and the mounting hole 325 of the latch arm 321, an aperture of the through hole 311 is larger than an outer diameter of the trigger shaft 324 and a sufficient space is reserved, the trigger shaft 324 is pushed to have enough swing space; in this embodiment, the jumper 33 is pivotally mounted on one side of the trip lever 31 to form a snap-fit with only one of the latch arms 321 in the latch 32.

Preferably, the trigger shaft 324 includes a long shaft 3241 and a short shaft 3242 which are vertically connected, the trigger shaft 324 is L-shaped in fig. 15, but a T-shaped structure may also be adopted, the long shaft 3241 is fitted in the mounting hole 325, the short shaft 3242 is located at one side of the latch 32 to limit the long shaft 3241 in the mounting hole 325, in this embodiment, the short shaft 3242 is located between the latch 32 and the partition 6, the short shaft 3242 abuts against the partition 6 to prevent the trigger shaft 324 from falling off from the latch 32 when the latch 32 rotates, and the opening push rod 4 can push the long shaft 3241 to rotate the latch 32, specifically push an end of the long shaft 3241 abutting against the partition 6 to rotate the latch 32. The structure improves the connection stability among the lock catch 32, the trigger shaft 324 and the trip lever 31.

The working process is described in detail with reference to the figures:

opening operation: when the circuit breaker is in a closed state, the opening part 211 and the opening push rod 4 are located at an original position (the original position of the opening mechanism is illustrated in fig. 11, but the circuit breaker is in an open state in fig. 11), the mating surface of the opening push rod 4 contacts with the opening part 211, the pushing surface of the opening push rod 4 matches with the trigger shaft 324 of the latch 32, that is, the side surface near the right end surface of the straight section 44 of the opening push rod 4 contacts with the trigger shaft 324 of the latch 32, the opening part 211 pushes the opening push rod 4 to rotate along with the opening rotation of the transmission mechanism 2, the opening part 211 rotates clockwise in fig. 11, the opening mechanism rotates to the position illustrated in fig. 12, the middle part of the upper end of the opening push rod 4 is rotatably assembled, the pushing surface of the opening push rod 4 rotates clockwise by a certain angle, the rotating angle is marked as α in fig. 12, the pushing surface applies a downward pushing force to the trigger shaft 324 of the latch 32, and the latch 32 rotates under the pushing force, the hasp surface of the hasp 32 and one end of the jump buckle 33 are staggered, the hasp structures of the hasp 32 and the jump buckle 33 are unlocked, and the operation mechanism 3 acts to drive the contact mechanism to open; after the circuit breaker is opened, the transmission mechanism 2 rotates towards the closing direction, the opening part 211 rotates back to the original position, the rotation direction of the opening part 211 in the figure is anticlockwise rotation, the opening push rod 4 rotates under the action of the elastic piece 5 until the original position, the matching boss 421 of the opening push rod 4 contacts with the opening part 211, the limiting surface of the opening push rod 4 is attached to the limiting structure 62 of the partition plate 6, the pushing surface of the opening push rod 4 is separated from the trigger shaft 324, the circuit breaker is in the opening state, and the circuit breaker is in the state shown in fig. 11.

Closing action: when the circuit breaker is in a switching-off state, the transmission mechanism 2 continues to rotate towards a switching-on direction, at this time, the switching-off part 211 is driven to deviate from an original position, the rotation direction of the switching-off part 211 is anticlockwise in this embodiment, the switching-off push rod 4 still keeps in a normal position under the action of the limiting structure 62 of the partition plate 6, and at this time, the matching boss 421 is separated from the switching-off part 211; because the first gear of the transmission mechanism 2 is linked with the handle 1, the handle 1 rotates in the closing direction, and the operating mechanism 3 drives the contact mechanism to complete the closing action under the linkage action of the handle 1, at this time, the state of the circuit breaker is as shown in fig. 13. After the circuit breaker is closed, the transmission mechanism 2 rotates towards the opening direction, at this time, the linkage structure on the handle 1 and the first gear is released from linkage fit, and the opening part 211 is contacted with the matching boss 421 of the opening push rod 4 again.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The utility model provides a miniature circuit breaker, includes the casing be equipped with handle (1), operating device (3) and be used for driving transmission mechanism (2) of the automatic divide-shut brake of circuit breaker in the casing, handle (1) is connected with operating device (3), transmission mechanism (2) linkage respectively, operating device (3) jump including snap-fit and detain (33) and hasp (32), its characterized in that: still be equipped with separating brake mechanism between handle (1) and operating device (3), separating brake mechanism is including setting up separating brake portion (211) on drive mechanism (2), rotating assembly separating brake push rod (4) in the casing and setting up trigger part (323) on hasp (32), when drive mechanism (2) carry out the separating brake and rotate, separating brake push rod (4) are to trigger part (323) application of force under the drive of separating brake portion (211), make hasp (32) and jump and detain (33) unblock and then make operating device (3) action, circuit breaker separating brake.

2. A miniature circuit breaker according to claim 1, wherein: after the breaker is opened, the transmission mechanism (2) rotates towards the closing direction, and the opening push rod (4) and the opening part (211) rotate back to the original position; when the transmission mechanism (2) performs switching-on rotation, the transmission mechanism (2) rotates towards the switching-on direction and drives the handle (1) to rotate towards the switching-on direction, and the handle (1) drives the operating mechanism (3) to act so as to switch on the circuit breaker; after the circuit breaker is switched on, the transmission mechanism (2) rotates towards the switching-off direction, and the switching-off push rod (4) and the switching-off part (211) are both located at the original positions.

3. A miniature circuit breaker according to claim 1, wherein: the brake separating mechanism further comprises an elastic piece (5), the elastic piece (5) provides elastic force for the brake separating push rod (4), and the elastic force is used for enabling the brake separating push rod (4) to rotate back to an original position after brake separating is finished.

4. A miniature circuit breaker according to claim 1, wherein: the brake separating mechanism further comprises an elastic piece (5), the elastic piece (5) provides elastic force for the brake separating push rod (4), and the elastic force is used for enabling the brake separating push rod (4) to be always kept against the brake separating part (211).

5. A miniature circuit breaker according to claim 3 or 4, wherein: elastic component (5) are the torsional spring, and the middle part assembly of torsional spring is in the casing, and the first elastic arm of torsional spring supports in the casing, and the terminal bending type of the second elastic arm of torsional spring supports and leans on the portion, support and lean on the lateral wall cooperation of portion and separating brake push rod (4).

6. A miniature circuit breaker according to claim 3 or 4, wherein: the body of rod of separating brake push rod (4) is equipped with breach (41), the breach face of breach (41) is used for leaning on with separating brake portion (211), and the body of rod side of separating brake push rod (4) of breach (41) is as spacing face dorsad for be connected with the one end cooperation of elastic component (5), be equipped with the push face that is used for to trigger portion (323) application of force of hasp (32) on separating brake push rod (4), the push face setting is at the tip of separating brake push rod (4) or the region that is close to the tip.

7. A miniature circuit breaker according to claim 1 or 4, wherein: the middle part of hasp (32) is rotated and is assembled on tripping lever (31) of operating device (3), is equipped with hasp arm (321) and trigger arm (322) respectively at the both ends of hasp (32), the terminal surface of hasp arm (321) is established to the hasp face and is used for forming hasp structure with the one end cooperation of jump buckle (33) the tip of trigger arm (322) is equipped with the trigger face, and separating brake push rod (4) make hasp (32) and jump buckle (33) unblock through the application of force to the trigger face.

8. A miniature circuit breaker according to claim 1, wherein: drive mechanism (2) include motor drive system and gear train, motor drive system is used for driving gear train to close a floodgate or the separating brake rotates, the gear train includes first gear and second gear (21) at least, first gear is used for being connected with handle (1) linkage, is equipped with separating brake portion (211) that promote separating brake push rod (4) on second gear (21).

9. A miniature circuit breaker according to claim 8, wherein: the first gear is meshed with the second gear (21) and is coaxially mounted with the handle (1), a linkage structure is arranged between the first gear and the handle (1), the handle (1) is driven by the transmission mechanism (2) to perform closing rotation, and a boss serving as a brake separating part (211) is arranged on one surface, facing the operating mechanism (3), of the second gear (21).

10. A miniature circuit breaker according to claim 1, wherein: be provided with baffle (6) in the casing be equipped with on baffle (6) and dodge groove (61), drive mechanism (2) assemble in the casing of baffle (6) back one side, and operating device (3) and separating brake mechanism assemble in the casing of baffle (6) front one side, and separating brake portion (211) pass and dodge groove (61) and separating brake push rod (4) cooperation.

Images