CN205789805U - Chopper - Google Patents

Abstract

A kind of chopper, including housing and operating mechanism, moving contact, static contact and the bimetal leaf being arranged in housing, operating mechanism drives moving contact to swing and is contacting and separating with static contact, during chopper overload, bimetal leaf heated bending drives snap close piece to make operating mechanism unlock, bimetal leaf drives snap close piece by the STATEMENT OF FEDERALLY SPONSORED on snap close piece, and STATEMENT OF FEDERALLY SPONSORED to act on the tripping force of snap close piece be multiple.Achieve the maximization that STATEMENT OF FEDERALLY SPONSORED acts on the dropout moment of snap close piece, improve the miniaturization of the stability of overload protection, beneficially chopper.

Description

Chopper

Technical field

This utility model belongs to Low Voltage Electrical Apparatus, is specifically related to a kind of chopper, particularly a kind of miniature circuit breaker.

Background technology

Operating mechanism is one of core component of chopper indispensability, for driving the disjunction/Guan Bi of moving contact and static contact, and is realized the combined floodgate of chopper, separating brake and three kinds of groundwork states of tripping operation by the control of disjunction/Guan Bi.Operating mechanism includes snap close piece, the tripping operation of chopper is realized by driving the double leval jib (or multi link) of the operable mechanism of snap close piece to unlock, snap close piece can be driven by magnetictrip when circuit breaker short circuit, during overload, drive snap close piece by the bimetal leaf of delayed release.The bimetallic overlond trip action of prior art generally need to act on snap close piece by the STATEMENT OF FEDERALLY SPONSORED of, bimetal leaf is connected on snap close piece by this STATEMENT OF FEDERALLY SPONSORED with single-direction transmission, and the drive connection between STATEMENT OF FEDERALLY SPONSORED and snap close piece only has the application point of an active force, therefore STATEMENT OF FEDERALLY SPONSORED and bimetallic free end need to retain sufficiently large activity space, otherwise when performing dropout tripping operation in STATEMENT OF FEDERALLY SPONSORED by bimetallism, bimetallism power is often made not act on snap close piece completely, the instability of overlond trip protective value can be caused, affect the miniaturization of chopper.

In addition, another reason of the miniaturization affecting chopper is that the parts of operating mechanism are various, all need to arrange three elastic components as the operating mechanism of existing miniature circuit breaker, one of them refers to the most described energy-stored spring for providing mechanism's return, another refers to the most described excess of stroke spring for providing contact pressure and the excess of stroke, and another refers to the most described back-moving spring for providing the positive engagement between tripping part and snap close piece.Have again, the moving contact of chopper generally needs two parts to constitute, one of them is moving contact, another is the contact support supporting moving contact, if the distance between reducing they and the volume of associated part and compression element, such as the interval between compression conductive part or the size of electric-conductor, deteriorating of electric property and security performance can be caused, there is the biggest risk in the most this measure, is worthless.And, contact assembles with support lever after needing to weld with a supporter again, and not only manufacturing process is complicated, and reliability is the highest, the most significantly occupies space at interiors of products, makes product Miniaturization Design be obstructed.

Summary of the invention

For solving above-mentioned problems of the prior art, the purpose of this utility model is to provide a kind of chopper, it is possible to reduces bimetallic and loses the active force of mechanism's snap close piece, improves the reliability of chopper overload protection.

A kind of chopper, including housing and operating mechanism, moving contact 5, static contact 8 and the bimetal leaf 7 being arranged in housing, operating mechanism drives moving contact 5 to swing and is contacting and separating with static contact 8, during chopper overload, bimetal leaf 7 heated bending drives snap close piece 92 to make operating mechanism unlock, bimetal leaf 7 drives snap close piece 92 by the STATEMENT OF FEDERALLY SPONSORED 93 on snap close piece 92, and STATEMENT OF FEDERALLY SPONSORED 93 to act on the tripping force of snap close piece 92 be multiple.

Preferably, STATEMENT OF FEDERALLY SPONSORED 93 acts on the tripping force of snap close piece 92 is two.

Preferably, described snap close piece 92 is provided with the second dropout drive division 922 and the 3rd dropout drive division 923 coordinated with STATEMENT OF FEDERALLY SPONSORED 93, wherein the second dropout drive division 922 and the first end 93a chain connection of STATEMENT OF FEDERALLY SPONSORED 93, the 3rd dropout drive division 923 drives with the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 and coordinates.

Preferably, described snap close piece 92 also includes the first dropout drive division 921 coordinated with magnetictrip.

Preferably, described STATEMENT OF FEDERALLY SPONSORED 93 is sequentially connected with by its first end 93a, drive rod 93b, the second end 93c and is bent to concave shape, and its first end 93a and drive rod 93b coordinates with snap close piece 92 transmission, and the second end 93c coordinates with the movable end transmission of bimetal leaf 7.

Preferably, STATEMENT OF FEDERALLY SPONSORED 93 acts on two tripping forces of snap close piece 92, and one of them is pulling force M, and another is thrust N, further, pulling force M is identical relative to the direction of the moment of the center of rotation 41 of snap close piece 92 with thrust N relative to the direction of the moment of the center of rotation 41 of snap close piece 92.

Preferably, it is pivoted on supporting member 4 in the middle part of described snap close piece 92, one end is provided with lock tooth 92a, the other end is dropout drive division, dropout drive division extends to both sides respectively and forms the first dropout drive division 921 and the 3rd dropout drive division 923, first dropout drive division 921 and the 3rd dropout drive division 923 are positioned at moving contact 5 both sides, and the second dropout drive division 922 is the hinge hole being arranged on dropout drive division, and between moving contact 5 and the 3rd dropout drive division 923.

Preferably, described snap close piece 92 being additionally provided with elastic reset angle 920, the termination at elastic reset angle 920 becomes the antenniform that wave is curved.

Preferably, described operating mechanism includes handle 2, drive link 3, contact support, tripping part 91 and snap close piece 92；Handle 2 is pivoted on housing, drive link 3 two ends connect respectively at handle 2 and tripping part 91, contact support is pivoted in housing, moving contact is arranged on contact by excess of stroke spring and supports, tripping part 91 and snap close piece 92 are pivoted in contact support and tripping part 91 and snap close piece 92 hasp connect.

Preferably, described operating mechanism includes handle 2, drive link 3, supporting member 4, contact support, tripping part 91 and snap close piece 92；Handle 2 is pivoted on housing, drive link 3 two ends connect respectively at handle 2 and tripping part 91, supporting member 4 is pivoted in housing, contact support, tripping part 91 and snap close piece 92 are pivoted in contact support and tripping part 91 and snap close piece 92 hasp connect, moving contact is arranged on contact and supports, contact support is arranged on supporting member 4 by excess of stroke spring.

Chopper of the present utility model; by the global design of snap close piece 92 with the most power-actuated structure of STATEMENT OF FEDERALLY SPONSORED 93, simple and reasonable, it is achieved that STATEMENT OF FEDERALLY SPONSORED 93 acts on the maximization of the dropout moment of snap close piece 92; improve the miniaturization of the stability of overload protection, beneficially chopper.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail, can be seen more clearly from advantage of the present utility model and feature, wherein from the description of accompanying drawing illustrated embodiment:

Fig. 1 is the floor map that chopper of the present utility model is in disjunction state.

Fig. 2 is the floor map that chopper of the present utility model is in closure state.

Fig. 3 is the perspective view of chopper of the present utility model.

Fig. 4 is the local back view of Fig. 2.

Fig. 5 is moving contact shown in Fig. 15 and the assembly relation of common shaft 11 and force system in equilibrium structural upright schematic diagram, is the moving contact 5 being in disjunction state shown in figure, and its slip slotted eye 51 and common shaft 11 is in bearing engagement state.

Fig. 6 is moving contact shown in Fig. 25 and the assembly relation of common shaft 11 and force system in equilibrium structural upright schematic diagram, is the moving contact 5 being in closure state shown in figure, and its slip slotted eye 51 and common shaft 11 is in suspension mated condition.

Fig. 7 is the cooperation schematic diagram of the supporting member 4 in the chopper of the present utility model shown in Fig. 1, moving contact 5 and static contact 8, and slip slotted eye 51 and the common shaft 11 of the moving contact 5 shown in figure are in bearing engagement state.

Fig. 8 is the cooperation schematic diagram of the supporting member 4 in the chopper of the present utility model shown in Fig. 2, moving contact 5 and static contact 8, and slip slotted eye 51 and the common shaft 11 of the moving contact 5 shown in figure are in suspension mated condition.

Fig. 9 is the A partial enlarged drawing of Fig. 3, it is shown that the engagement/disengagement fit structure between the buckle teeth 91a and the lock tooth 92a of snap close piece 92 of the tripping part 91 of actuating device 9.

Figure 10 is the B partial enlarged drawing of Fig. 2, it is shown that the power system distributed architecture driving fit structure between snap close piece 92 and the STATEMENT OF FEDERALLY SPONSORED 93 of actuating device 9.

Figure 11 is the structural representation of the moving contact 5 of chopper of the present utility model.

Figure 12 is the structural representation of the STATEMENT OF FEDERALLY SPONSORED 93 of chopper of the present utility model.

Detailed description of the invention

In order to illustrate the technical solution of the utility model and technical purpose, below in conjunction with the accompanying drawings and this utility model is described further by detailed description of the invention.

See Fig. 1-4,10; miniature circuit breaker of the present utility model includes housing, the operating mechanism being arranged in housing, moving contact 5 and the static contact 8 that pedestal 1 and cap are formed; operating mechanism drives moving contact 5 to swing and is contacting and separating with static contact 8, and chopper also includes for the thermal trip of overload protection and bimetal leaf 7 thereof, for circuit breaker components such as the magnetictrip of short-circuit protection and push rods thereof.

One beneficial features of miniature circuit breaker of the present utility model is the most power-actuated structure of snap close piece 92 and STATEMENT OF FEDERALLY SPONSORED 93, during chopper overload, bimetal leaf 7 heated bending drives snap close piece 92 to make operating mechanism unlock, bimetal leaf 7 drives snap close piece 92 by the STATEMENT OF FEDERALLY SPONSORED 93 on snap close piece 92, and STATEMENT OF FEDERALLY SPONSORED 93 to act on the tripping force of snap close piece 92 be multiple.Preferably, it is two that STATEMENT OF FEDERALLY SPONSORED 93 acts on the tripping force of snap close piece 92, can realize the maximization of dropout moment, avoids again making structure the most complicated, beneficially the Miniaturization Design of chopper.Chopper of the present utility model; by the global design of snap close piece 92 with the most power-actuated structure of STATEMENT OF FEDERALLY SPONSORED 93, simple and reasonable, it is achieved that STATEMENT OF FEDERALLY SPONSORED 93 acts on the maximization of the dropout moment of snap close piece 92; improve the stability of overload protection, the miniaturization of chopper can be conducive to.The bimetal leaf of the thermal trip of the overload protection of existing operating mechanism, drive connection is set up by pull bar and snap close, the hot trip action of bimetal leaf pulls pull bar, pull bar pulls snap close (driving of the most single pulling force) again, its shortcoming is, when the tangential direction that pull bar pulls the direction of pull deviation snap close of snap close to rotate, pull bar acts on the moment of snap close and there will be loss, the degree of loss and the size positive correlation of deviation, and the problem that mechanism's miniaturization would generally relate to aggravate described deviation, as reduced the volume of related components, spacing between compression parts, there will be the aggravation of deviation the most unavoidably.To this problem, see Figure 10, dropout driving force between STATEMENT OF FEDERALLY SPONSORED 93 and the snap close piece 92 of the most power-actuated dropout actuating device 9 of the present utility model not only includes pulling force M, but also include thrust N, the moment loss i.e. caused by described deviation to have many power driving of pulling force M and thrust N to compensate, achieve the maximization that STATEMENT OF FEDERALLY SPONSORED 93 acts on the dropout moment of snap close piece 92, it is simple to the miniaturization of operating mechanism.Certain STATEMENT OF FEDERALLY SPONSORED of the present utility model acts on the tripping force of snap close piece can also be for more, contact with the maximization realizing moment respectively at the different driving portion of snap close piece when STATEMENT OF FEDERALLY SPONSORED swings to diverse location, but the structure that too much fit structure can make STATEMENT OF FEDERALLY SPONSORED and snap close piece is complicated, loses more than gain on the contrary.

As shown in Figure 1 to Figure 3: described operating mechanism includes the dropout actuating device 9 being arranged on supporting member 4, it includes the second end hinged tripping part 91 with drive link 3, snap close piece 92 and the STATEMENT OF FEDERALLY SPONSORED 93 coordinated with bimetal leaf 7, wherein tripping part 91 and snap close piece 92 are pivoted on supporting member 4 respectively, and tripping part 91 and snap close piece 92 overlap joint coordinate；Described tripping part 91 is connected by drive link 3 with handle 2, handle 2 drives supporting member 4 to rotate by drive link 3 and tripping part 91, be provided with on snap close piece 92 lock tooth 92a, the rotation of snap close piece 92 order about lock tooth 92a thereon be correspondingly arranged on tripping part 91 buckle teeth 91a engagement or separate.During short circuit, magnetictrip can drive snap close piece 92 rotation to make snap close piece 92 unlock with tripping part 91, and during overload, bimetal leaf 7 drives snap close piece 92 to rotate by STATEMENT OF FEDERALLY SPONSORED 93 and unlocks.It is pivoted on supporting member 4 in the middle part of described snap close piece 92, one end is provided with lock tooth 92a, the other end is dropout drive division, dropout drive division is provided with the first dropout drive division 921 coordinated with magnetictrip and the second dropout drive division 922 and the 3rd dropout drive division 923 coordinated with STATEMENT OF FEDERALLY SPONSORED 93, wherein the second dropout drive division 922 and the first end 93a chain connection of STATEMENT OF FEDERALLY SPONSORED 93, the 3rd dropout drive division 923 drives with the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 and coordinates.Wherein, dropout drive division extends to both sides respectively and forms the first dropout drive division 921 and the 3rd dropout drive division 923, first dropout drive division 921 and the 3rd dropout drive division 923 are positioned at moving contact 5 both sides, second dropout drive division 922 is the hinge hole being arranged on dropout drive division, and between moving contact 5 and the 3rd dropout drive division 923.

The engagement of snap close piece 92 and tripping part 91 and separate linkage and the dropout realizing operating mechanism respectively.Specifically, under lock tooth 92a and buckle teeth 91a engagement, it is freely rotatable, so that mechanism is in the lock state that snap close piece 92 all can not be made relative to supporting member 4 with tripping part 91.Under lock tooth 92a and buckle teeth 91a released state, it is freely rotatable that snap close piece 92 all can be made relative to supporting member 4 with tripping part 91, makes operating mechanism be in released state.The first end and handle 2 chain connection due to drive link 3, second end of drive link 3 and tripping part 91 chain connection, so: in the locked state, the rotational of handle 2 drives supporting member 4 to rotate around common shaft 11 by drive link 3, to realize the switch closing and switch opening operation of operating mechanism, pedestal 1 under the combined floodgate settling position limited by pedestal 1 of handle 2 and separating brake settling position can be with the Spring balanced of spring 6 for the counteracting force of handle 2, so that operating mechanism is stable at "on" position or gate-dividing state；In the unlocked state, owing to tripping part 91 can be freely rotatable, therefore pedestal 1 act on handle 2 counteracting force can not the elastic force of balancing spring 6, then make operating mechanism automatically perform tripping operation.

Specifically, as shown in Figure 10, it is two that described STATEMENT OF FEDERALLY SPONSORED 93 acts on the tripping force of snap close piece 92 when driving and coordinating, one of them is pulling force M, another is thrust N, pulling force M is identical relative to the direction of the moment of the center of rotation 41 of snap close piece 92 (pulling force N × arm of force Am) with thrust N relative to the direction of the moment of the center of rotation 41 of snap close piece 92 (pulling force M × arm of force Am), i.e. the first end 93a of STATEMENT OF FEDERALLY SPONSORED 93 acts on the pulling force M of the second dropout drive division 922 and orders about the direction that snap close piece 92 rotates and act on thrust N of the 3rd dropout drive division 923 with the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 to order about the direction of snap close piece 92 rotation identical.As shown in Figure 10, when STATEMENT OF FEDERALLY SPONSORED 93 coordinates with bimetal leaf 7 driving, angle a between drive rod 93b and the bimetal leaf 7 of STATEMENT OF FEDERALLY SPONSORED 93 is more than 90 °, so that the movable end of bimetal leaf 7 is when swinging towards the dropout direction of R, the the second end 93c ordering about STATEMENT OF FEDERALLY SPONSORED 93 is coordinated to shift up from the driving of the movable end of bimetal leaf 7 with the second end 93c of STATEMENT OF FEDERALLY SPONSORED 93, this shifts up so that the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 forms thrust N upwards, so that thrust N remains and identical with pulling force M direction.In short, it is to be achieved in that by following structure that many power of the present utility model drive: the second dropout drive division 922 is hinged with the first end 93a of STATEMENT OF FEDERALLY SPONSORED 93 draws power-actuated structure to snap close piece 92 for realizing STATEMENT OF FEDERALLY SPONSORED 93；The drive rod 93b of the 3rd dropout drive division 923 and STATEMENT OF FEDERALLY SPONSORED 93 drives being used for of coordinating to realize STATEMENT OF FEDERALLY SPONSORED 93 and snap close piece 92 is pushed away power-actuated structure.Described herein driving coordinates the cooperation referring to contact/separate, that is:, during STATEMENT OF FEDERALLY SPONSORED 93 drives snap close piece 92 (i.e. during overlond trip action), the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 contacts with the 3rd dropout drive division 923 of snap close piece 92；And in other conditions, the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 can separate with the 3rd dropout drive division 923 of snap close piece 92.In addition, this utility model uses the structure of above-mentioned lock tooth 92a and buckle teeth 91a engagement/disengagement, tripping part 91 and snap close piece 92 pivotally mounted (i.e. pivotally supporting) structure on supporting member 4 respectively, and the structure that supporting member 4 pivotally mounted (i.e. pivotally supporting) is on common shaft 11, it also has advantageous effect in that, make the driving-chain of drive link 3-tripping part 91-snap close piece 92-supporting member 4-drive division 40-driving head 50-moving contact 5 does not the most exist the mobile link affecting transmission accuracy, therefore the transmission accuracy between drive link 3 and moving contact 5 can effectively be guaranteed, transmission stability and reliable transmission, this is for moving contact 5 structure of slip, it it is the premium properties of particular importance.

Another beneficial features of the present utility model is the further improvement of the concrete structure about dropout actuating device 9, and these preferred versions improved include the most every.Such as, as shown in figure 12, the STATEMENT OF FEDERALLY SPONSORED 93 of described dropout actuating device 9 is by its first end 93a, drive rod 93b, second end 93c is sequentially connected with and bends to concave shape, and the first end 93a, drive rod 93b, second end 93c respectively has the position of separate transmission matching relationship, i.e. first end 93a, drive rod 93b, second end 93c directly coordinates with a position transmission on snap close piece 92 or bimetal leaf 7 respectively, particularly as follows: its first end 93a and the second dropout drive division 922 chain connection on snap close piece 92, its second end 93c coordinates with the movable end transmission of the bimetal leaf 7 of operating mechanism thermal release device, drive rod 93b coordinates with the 3rd dropout drive division 923 transmission on snap close piece 92.For another example, as shown in Figure 4, the snap close piece 92 of described dropout actuating device 9 is additionally provided with elastic reset angle 920, for realizing engaging of lock tooth 92a and the buckle teeth 91a of the snap close piece 92 shown in Fig. 9.Elastic reset angle 920 and snap close piece 92 can integrated injection molding, to obtain excellent manufacturability and almost without increasing the economy of cost.The termination at elastic reset angle 920 becomes the antenniform that wave is curved, it is slidably matched with supporting member 4 or pedestal 1, in mechanism's releasing process: tripping force drives snap close piece 92 to rotate to drive lock tooth 92a and the movement at elastic reset angle 920, while lock tooth 92a is separated with the buckle teeth 91a on tripping part 91, supporting member 4 or pedestal 1 are slidably matched so that elastic reset angle 920 elastic deformation is with energy storage；Once cancelling tripping force, then elastic reset angle 920 releasability recover elastic deformation, this recoverable force can drive snap close piece 92 to turn round, until lock tooth 92a and buckle teeth 91a reset is engaged.The structure at elastic reset angle 920 not only volume is little, and elastic force is soft, can compress and bend, it is adaptable to the cooperation compressed simultaneously and slide, and can be effectively improved the homing action characteristic of snap close piece 92.

Many power transmission between STATEMENT OF FEDERALLY SPONSORED 93 of the present utility model and snap close piece 92, goes for the operating mechanism with snap close piece 92.Such as the embodiment of a kind of operating mechanism, described operating mechanism includes handle 2, drive link 3, supporting member 4, contact support, tripping part 91 and snap close piece 92；Handle 2 is pivoted on housing, drive link 3 two ends connect respectively at handle 2 and tripping part 91, supporting member 4 is pivoted in housing, contact support, tripping part 91 and snap close piece 92 are pivoted in contact support and tripping part 91 and snap close piece 92 hasp connect, moving contact is arranged on contact and supports, contact support is arranged on supporting member 4 by excess of stroke spring.The operating mechanism described in embodiment of another kind of operating mechanism includes handle 2, drive link 3, supporting member 4, contact support, tripping part 91 and snap close piece 92；Handle 2 is pivoted on housing, drive link 3 two ends connect respectively at handle 2 and tripping part 91, supporting member 4 is pivoted in housing, contact support, tripping part 91 and snap close piece 92 are pivoted in contact support and tripping part 91 and snap close piece 92 hasp connect, moving contact is arranged on contact and supports, contact support is arranged on supporting member 4 by excess of stroke spring.Two kinds of above-mentioned operating mechanisms are equipped with travel mechanism and excess of stroke spring, the many power transmission between STATEMENT OF FEDERALLY SPONSORED 93 of the present utility model and snap close piece 92, are also applied for obtaining operating mechanism without the miniaturization of travel mechanism and excess of stroke spring.

Such as Fig. 5-8, the operating mechanism of miniature circuit breaker of the present utility model, without travel mechanism and excess of stroke spring；Described moving contact 5 coordinates with supporting member 4 Contact Transmission, and moving contact 5 can rotate around same axle together with supporting member 4 and can make again sliding relative to supporting member 4 (i.e. along the movement of radial direction of its rotary shaft).Can be found in the embodiment shown in Fig. 5-8: supporting member 4 and moving contact 5 are pivoted on same common shaft 11, one end of spring 6 is fixed on pedestal 1, the other end is connected with moving contact 5, handle 2 drives supporting member 4 to rotate by drive link 3, supporting member 4 promotes moving contact 5 to rotate, described moving contact 5 can rotate around same common shaft 11 together with supporting member 4, again can be relative to supporting member 4 sliding." Contact Transmission cooperation " described here refers to supporting member 4 and can rotate and can the transmission of moving contact 5 of sliding movement coordinate, this transmission coordinate get rid of non-that contact all the time or exist relatively slide as directly driven from connecting rod with the transmission of moving contact.This construction features not only contributes to the Miniaturization Design of operating mechanism, as: excess of stroke spring and travel mechanism can be omitted by the sliding of moving contact 5, and coordinated by Contact Transmission and can effectively overcome problems such as affecting the operation precision of moving contact 5, stationarity, reliability, moreover it is possible to optimize the performance of operating mechanism, electric property and job stability and reliability.Therefore, for moving contact 5 structure of slip, use above-mentioned Contact Transmission fit structure to seem particular importance.

Another beneficial features of the present utility model relates to the concrete structure design of the operating mechanism improved further under said structure scheme, it can have kinds of schemes, a kind of preferably scheme is as shown in Figure 3,4: described moving contact 5 is provided with slip slotted eye 51, and the size of slip slotted eye 51 is more than the size of common shaft 11；Described supporting member 4 and moving contact 5 stacking are arranged on same common shaft 11, described supporting member 4 is provided with the drive division 40 of projection, the end extension of described moving contact 5 is provided with the driving head 50 coordinated with drive division, and the Contact Transmission realized between moving contact 5 with supporting member 4 with the drive division 40 on supporting member 4 by the driving head 50 on moving contact 5 is coordinated.Described supporting member 4 promotes moving contact 5 to contact with static contact 8 by drive division 40, described spring 6 provides the excess of stroke and the active force separated with static contact 8 for moving contact 5, and spring 6 has for driving the disjunction offer of moving contact 5 and static contact 8 contact pressure when the energy storage elastic force needed for reset and guarantee close needed for contact electrical contact reliability and the dual-use function of the excess of stroke.Moving contact 5 coordinates particularly as follows: in moving contact 5 with static contact 8 closing course with supporting member 4 Contact Transmission, supporting member 4 is rotated around common shaft 11 by the driving of the operating physical force from handle 2, the rotation of supporting member 4 drives drive division 40 thereon to rotate, driving head 50 contacts cooperation and the rotation of drive division 40 is passed to driving head 50 with drive division 40, makes driving head 50 drive moving contact 5 not only to rotate around common shaft 11 but also made mobile (sliding) relative to the radial direction (towards the radial direction of common shaft 11) of common shaft 11 (being also relative to supporting member 4)；Under moving contact 5 with static contact 8 closure state, seeing Fig. 6, Fig. 8, slip slotted eye 51 is suspended on common shaft 11, it may be assumed that slip slotted eye 51 suspends with common shaft 11 and coordinates.In moving contact 5 with static contact 8 breaking course, moving contact 5 had not only been made relative to the sliding of common shaft 11 (being also relative to supporting member 4) by the elastic force effect of spring 6 but also had made the rotation around common shaft 11, the action of moving contact 5 drives driving head 50 thereon action, cooperation is contacted by driving head 50 and drive division 40, the action of driving head 50 passes to drive division 40, and drive division 40 drives supporting member 4 to rotate around common shaft 11.Seeing Fig. 5, Fig. 7, under moving contact 5 with static contact 8 disjunction state, slip slotted eye 51 is bearing on common shaft 11, it may be assumed that slip slotted eye 51 and common shaft 11 bearing engagement.Show from Fig. 7 to Fig. 8 and become supporting from the slip of separating brake of closing a floodgate from suspension, then show from Fig. 5 to Fig. 6 and become suspending from supporting from separating brake to the slip closed a floodgate.Above-mentioned suspension coordinates, refer to that the action of moving contact 5 drives slip slotted eye 51 sliding on common shaft 11, and make common shaft 11 be positioned at the medium position (position as shown in Fig. 6, Fig. 8) of slip slotted eye 51, under this suspension mated condition, common shaft 11 separates with circular arc bearing-surface 51a (seeing Figure 11) of slip slotted eye 51, so that releasing support relation (i.e. forming suspended state) between moving contact 5 and common shaft 11.Above-mentioned bearing engagement, refer to that the action of moving contact 5 drives slip slotted eye 51 sliding on common shaft 11, and make common shaft 11 be positioned at one end (position as shown in Figure 5, Figure 7) of slip slotted eye 51, under this bearing engagement state, common shaft 11 contacts with circular arc bearing-surface 51a (seeing Figure 11) of slip slotted eye 51, so that moving contact 5 is bearing on common shaft 11 by the circular arc bearing-surface 51a of slip slotted eye 51.

Another beneficial features of the present utility model is that the structure about moving contact 5 is improved, the structure of a kind of preferred moving contact 5 is as shown in figure 11: described moving contact 5 is provided with slip slotted eye 51, one end is provided with movable contact 53, and the other end is provided with the driving head 50 coordinated with supporting member 4；Moving contact 5 is additionally provided with the spring eye 52 being connected with spring 6, and spring eye 52 is between the driving head 50 and slip slotted eye 51 of moving contact 5, and slides slotted eye 51 between driving head 50 and movable contact 53.Driving head 50 contacts all the time with the drive division 40 on supporting member 4, and spring eye 52 is for mounting the other end of multi-function spring 6, and slip slotted eye 51 is arranged on common shaft 11, and movable contact 53 closes with static contact 8/and disjunction coordinates.The shape and structure of a kind of preferred slip slotted eye 51 is as shown in figure 11: the described slip slotted eye 51 on moving contact 5 includes by an a circular arc bearing-surface 51a and U-shaped sliding surface 51b, circular arc bearing-surface 51a and common shaft 11 bearing engagement, U shape sliding surface 51b is slidably matched with common shaft 11, i.e. moving contact 5 is in slipping, two longer faces of its U-shaped sliding surface 51b are slidably matched with common shaft 11, to guide the glide direction of moving contact 5；Slip slotted eye 51 is more than the kidney-shaped of width H for length L so that moving contact 5 is the stroke with sliding in length L direction；Wherein to act on the direction of the elastic force Fb on moving contact 5 almost parallel, to reduce the moving contact 5 frictional resistance in slipping for the bearing of trend of length L and multi-function spring 6.During closing operation, under the effect of spring 6, slip slotted eye 51 side on moving contact contacts with common shaft 11, moving contact 5 carries out, with the rotation of handle 2, motion of closing a floodgate, until after moving contact 5 contacts with static contact 8, the slip slotted eye 51 on moving contact separates with common shaft 11, and keeps certain distance.

The structure of moving contact 5 of the present utility model and slip slotted eye 51 thereof improves the structure also including following force system in equilibrium, and these structures can have multiple concrete mode, but uses preferred mode most important for the performance optimizing operating mechanism further.The force system in equilibrium structure of a kind of preferred moving contact 5 is as shown in Figures 1 to 6.Under moving contact 5 with static contact 8 closure state (as shown in 2 and Fig. 6), spring 6 acts on the drive division 40 of elastic force Fb on moving contact 5 and supporting member 4 and acts on the driving force Fa of driving head 50 and static contact 8 acts on the contact force Fc balance of moving contact 5, i.e. by external force balance (seeing Fig. 6) making a concerted effort to realize on moving contact 5 of elastic force Fb opposing driving force Fa with contact force Fc；Obviously, the force system in equilibrium under closure state is to be coordinated with the suspension of common shaft 11 from slip slotted eye 51 to constitute, and it is unrelated with the supporting force of common shaft 11, and it is elastic contact force that static contact 8 acts on contact force Fc of moving contact 5, therefore can omit traditional travel mechanism.Under moving contact 5 with static contact 8 disjunction state (as shown in 1 and Fig. 5), multi-function spring 6 acts on elastic force Fb on moving contact 5 and drive division 40 and acts on the driving force Fa of driving head 50 and common shaft 11 acts on supporting force Fd balance (seeing Fig. 5) of slip slotted eye 51, i.e. by the external force balance making a concerted effort to realize on moving contact 5 of elastic force Fb opposing driving force Fa with supporting force Fd；Obviously, the structure of the force system in equilibrium under disjunction state is to be made up of the bearing engagement of slip slotted eye 51 with common shaft 11, and it is without the participation of static contact.The moving contact of existing operating mechanism generally need to be fully supported on fixing axle, can only be around solid fixed-axis rotation, the sliding relative to fixing axle and suspension can not be made, the most this mechanism have to increase travel mechanism, to realize the compensation of the excess of stroke action needed for moving contact is closed with static contact, and moving contact 5 of the present utility model not only can be bearing on common shaft 11, but also the sliding relative to common shaft 11 and suspension can be made, the compensation of the excess of stroke action to moving contact 5 can be realized with this.Second, the energy-stored spring of existing operating mechanism and excess of stroke spring need to use two springs, and wherein energy-stored spring must be connected between flap and pedestal, and excess of stroke spring must be connected between flap and moving contact, and not only mechanism is complicated, and volume is big；And spring 6 of the present utility model is with energy storage and excess of stroke dual-use function, its one end is connected with pedestal 1, and its other end is directly connected with moving contact 5, not only enormously simplify structure, but also can be effectively compressed the space that operating mechanism takies.Further, the flap of existing operating mechanism is typically mounted in a support shaft of pedestal, and moving contact is typically mounted in another support shaft of flap, the structure of this two support shafts, and not only mechanism is complicated, and volume is big；And this utility model uses a common shaft 11, and supporting member 4 and moving contact 5 are commonly mounted on common shaft 11 the Contact Transmission fit structure between (the most coaxial installation) and driving head 50 and drive division 40, not only enormously simplify structure, the volume of operating mechanism can be effectively compressed further, and the precision of transmission between moving contact 5 and supporting member 4 can be effectively improved, stationarity and reliability, because the action of moving contact 5 includes rotating and sliding, if using other to coordinate (such as the cooperation with sliding between moving contact 5 with supporting member 4, the cooperation that can contact/separate), then cannot guarantee the kinematic accuracy of moving contact 5, thus affect the performance of operating mechanism, the contact performance of dynamic/static contact and breaking capacity.

The operating process of the operating mechanism of miniature circuit breaker of the present utility model is further illustrated below in conjunction with Fig. 1 to Figure 12.

Making process: i.e. from the state of the moving contact 5 shown in Fig. 1 with static contact 8 disjunction, be converted to the state of the moving contact 5 shown in Fig. 2 and static contact 8 Guan Bi through manual operation.Under the disjunction state shown in Fig. 1, lock tooth 92a engages with buckle teeth 91a, and slip slotted eye 51 is in the contact condition shown in Fig. 5 with common shaft 11 bearing engagement, i.e. circular arc bearing-surface 51a and common shaft 11；Rotate clockwise when manual operation handle 2 orders about it, handle 2 promotes the drive link 3 being connected with its eccentric hinge to move, the mobile promotion tripping part 91 of drive link 3 and be locked snap close piece 92 together and rotate clockwise around common shaft 11 together with supporting member 4, the drive division 40 that rotates through of supporting member 4 coordinates with the Contact Transmission of driving head 50, moving contact 5 is driven to rotate clockwise around common shaft 11, until the movable contact 53 of moving contact 5 contacts Guan Bi with static contact 8；Then supporting member 4 is rotated further, and continue through drive division 40 and coordinate with driving head 50 Contact Transmission, drive moving contact 5 (direction of the Fa shown in Fig. 6) sliding to the right, until circular arc bearing-surface 51a separates with common shaft 11 and is converted to the suspension shown in Fig. 6 and coordinates, and the position of drive link 3 is crossed its flex point, handle 2 and mechanism and is transformed into the combined floodgate settling position shown in Fig. 2.

Separating brake process: i.e. from the state of the moving contact 5 shown in Fig. 2 with static contact 8 Guan Bi, be converted to the state of the moving contact 5 shown in Fig. 1 and static contact 8 disjunction through manual operation.In the closed condition shown in figure 2, lock tooth 92a engages with buckle teeth 91a, and slip slotted eye 51 suspends with common shaft 11 and coordinates, i.e. circular arc bearing-surface 51a and common shaft 11 are in the released state shown in Fig. 6；When manual operation handle 2 orders about it to the inverse time When pin direction rotates, handle 2 promotes the drive link 3 being connected with its eccentric hinge to move, the mobile promotion tripping part 91 of drive link 3 and be locked snap close piece 92 together and rotate counterclockwise around common shaft 11 together with supporting member 4, the drive division 40 that rotates through of supporting member 4 coordinates with the Contact Transmission of driving head 50 and the elastic force effect of spring 6, order about moving contact 5 (direction of the Fb shown in Fig. 6) sliding to the left, until circular arc bearing-surface 51a contacts with common shaft 11, be i.e. converted to the bearing engagement state shown in Fig. 5；Then supporting member 4 is rotated further, and continue through drive division 40 and coordinate with driving head 50 Contact Transmission, moving contact 5 is made to rotate counterclockwise around common shaft 11, the movable contact 53 of moving contact 5 is initially separated with static contact 8, until the position of drive link 3 get over back its flex point, movable contact 53 and static contact 8 is kept completely separate, handle 2 and mechanism are transformed into the separating brake settling position shown in Fig. 1.

Tripping operation process: the i.e. state from the moving contact 5 shown in Fig. 2 with static contact 8 Guan Bi is converted to the moving contact 5 shown in Fig. 1 and the state of static contact 8 disjunction through automatic trip.In the closed condition shown in figure 2, lock tooth 92a engages with buckle teeth 91a, and slip slotted eye 51 suspends with common shaft 11 and coordinates, i.e. circular arc bearing-surface 51a and common shaft 11 are in the released state shown in Fig. 6；When overload occur and during short trouble, the bimetal leaf 7 of magnetictrip (not shown) or thermal trip orders about snap close piece 92 and rotates around it center 41 and rotates that (magnetictrip passes through its push rod and promotes to the right the first dropout drive division 921 on snap close piece 92 counterclockwise；nullOr bimetal leaf 7 movable end STATEMENT OF FEDERALLY SPONSORED the most pulled over 93)，The rotation of snap close piece 92 drives lock tooth 92a thereon to separate with buckle teeth 91a，Mechanism is made to unlock，Drive link 3 is connected through the hinge act on the power of tripping part 91 and can not resist spring 6 and coordinate, with the Contact Transmission of driving head 50, the elastic force being delivered on supporting member 4 by moving contact 5 and drive division 40，Then supporting member 4 and connected tripping part 91 together are made、Snap close piece 92、STATEMENT OF FEDERALLY SPONSORED 93、Drive link 3 rotates counterclockwise around common shaft 11，The drive division 40 that rotates through of supporting member 4 coordinates with the Contact Transmission of driving head 50 and the elastic force effect of spring 6，Order about moving contact 5 (direction of the Fb shown in Fig. 6) sliding to the left，Until circular arc bearing-surface 51a contacts with common shaft 11，I.e. be converted to the bearing engagement state shown in Fig. 5；Then under the elastic force effect of spring 6, supporting member 4 is rotated further and continues through drive division 40 and coordinates with the Contact Transmission of driving head 50, moving contact 5 is made to rotate counterclockwise around common shaft 11, the movable contact 53 of moving contact 5 is initially separated with static contact 8, until the position of drive link 3 is crossed flex point, movable contact 53 disjunction complete with static contact 8, locked that tooth 92a and buckle teeth 91a recovery is engaged, handle 2 and mechanism are transformed into the separating brake settling position shown in Fig. 1.

Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims (10)

1. a chopper, the operating mechanism including housing and being arranged in housing, moving contact (5), stationary contact Head (8) and bimetal leaf (7), operating mechanism drive moving contact (5) swing to contact with static contact (8) and Separating, during chopper overload, bimetal leaf (7) heated bending drives snap close piece (92) to make operating mechanism unlock, It is characterized in that: bimetal leaf (7) drives snap close piece (92) by the STATEMENT OF FEDERALLY SPONSORED (93) on snap close piece (92), And it is multiple that STATEMENT OF FEDERALLY SPONSORED (93) acts on the tripping force of snap close piece (92).

Chopper the most according to claim 1, it is characterised in that: STATEMENT OF FEDERALLY SPONSORED (93) acts on snap close The tripping force of part (92) is two.

Chopper the most according to claim 2, it is characterised in that: described snap close piece (92) is provided with The the second dropout drive division (922) coordinated with STATEMENT OF FEDERALLY SPONSORED (93) and the 3rd dropout drive division (923), wherein Second dropout drive division (922) and the first end (93a) chain connection of STATEMENT OF FEDERALLY SPONSORED (93), the 3rd threads off Drive division (923) drives with the drive rod (93b) of STATEMENT OF FEDERALLY SPONSORED (93) and coordinates.

Chopper the most according to claim 3, it is characterised in that: described snap close piece (92) also includes The the first dropout drive division (921) coordinated with magnetictrip.

Chopper the most according to claim 2, it is characterised in that: described STATEMENT OF FEDERALLY SPONSORED (93) by its One end (93a), drive rod (93b), the second end (93c) are sequentially connected with and bend to concave shape, and it is first years old End (93a) and drive rod (93b) coordinate with snap close piece (92) transmission, the second end (93c) and bimetallic The movable end transmission of sheet (7) coordinates.

Chopper the most according to claim 2, it is characterised in that: STATEMENT OF FEDERALLY SPONSORED (93) acts on snap close Two tripping forces of part (92), one of them is pulling force M, and another is thrust N, and, pulling force M phase For direction and thrust N of moment of center of rotation (41) of snap close piece (92) relative to snap close piece (92) The direction of moment of center of rotation (41) identical.

Chopper the most according to claim 4, it is characterised in that: described snap close piece (92) middle part Being pivoted on supporting member (4), one end is provided with lock tooth (92a), and the other end is dropout drive division, threads off Drive division extends to both sides respectively and forms the first dropout drive division (921) and the 3rd dropout drive division (923), First dropout drive division (921) and the 3rd dropout drive division (923) are positioned at moving contact (5) both sides, and second Dropout drive division (922) is for being arranged on the hinge hole on dropout drive division, and is positioned at moving contact (5) and the Between three dropout drive divisions (923).

Chopper the most according to claim 1, it is characterised in that: described snap close piece also sets on (92) Being equipped with elastic reset angle (920), the termination of elastic reset angle (920) becomes the antenniform that wave is curved.

9. according to the arbitrary described chopper of claim 1-8, it is characterised in that: described operating mechanism bag Include handle (2), drive link (3), contact support, tripping part (91) and snap close piece (92)；Handle (2) Being pivoted on housing, drive link (3) two ends connect respectively at handle (2) and tripping part (91), Contact support is pivoted in housing, and moving contact is arranged on contact by excess of stroke spring and supports, tripping part And snap close piece (92) is pivoted in contact support and tripping part (91) and snap close piece (92) (91) Hasp connects.

10. according to the arbitrary described chopper of claim 1-8, it is characterised in that: described operating mechanism Including handle (2), drive link (3), supporting member (4), contact support, tripping part (91) and snap close piece (92)；Handle (2) is pivoted on housing, and drive link (3) two ends are respectively at handle (2) and jump Fastener (91) connect, supporting member (4) is pivoted in housing, contact support, tripping part (91) and Snap close piece (92) is pivoted in contact support and tripping part (91) and snap close piece (92) hasp connect, Moving contact is arranged on contact and supports, contact support is arranged on supporting member (4) by excess of stroke spring.