CN205959923U - Operation mechanism of small breaker - Google Patents

Abstract

The utility model provides an operation mechanism of small breaker, includes handle, transfer line, installs supporter and the moving contact that can be rotary motion in the casing, supporter and moving contact pivot are installed same public epaxial, the one end of spring is fixed on the base, the other end with move contact connection, the handle passes through the transfer line and drives the supporter and rotate, the supporter promotes the moving contact and rotates, the moving contact can wind same public axle together with the supporter and rotate, can slide for the supporter again. The utility model discloses can reduce spare part quantity and manufacturing process, if leave out former excess of stroke mechanism and excess of stroke spring, can further reduce the volume space of circuit breaker.

Description

The operating mechanism of miniature circuit breaker

Technical field

The utility model belongs to Low Voltage Electrical Apparatus and in particular to a kind of miniature circuit breaker, particularly a kind of small-sized open circuit The operating mechanism of device.

Background technology

Operating mechanism is one of indispensable core component of breaker, for driving the disjunction/closure of moving contact and static contact, And combined floodgate, separating brake and three kinds of groundwork states of tripping operation of breaker are realized by the control of disjunction/closure.With miniaturization and The continuous improvement of multi-functional use requirement, the use space restriction to miniature circuit breaker product is especially prominent, then minimizes tool There is suitable difficulty, one of its reason is exactly that the parts of operating mechanism are various, such as the operating mechanism one of existing miniature circuit breaker As all need to arrange three elastic components, one of refer to the generally described energy-stored spring for providing mechanism's return, another refers to The generally described excess of stroke spring for providing contact pressure and the excess of stroke, another refer to generally described for provide tripping part and The back-moving spring of the positive engagement between snap close piece.Further, the moving contact of breaker generally needs two parts to constitute, one of Moving contact, another is that the contact supporting moving contact is supported, if reduce they and associated part volume and Interval between the distance between compression element, such as compression conductive part or the size of electric-conductor, can lead to electric property and safety The deteriorating of performance, there is very big risk in therefore this measure, be worthless.Additionally, the bimetallic overload of prior art Trip action generally need to act on snap close piece by the STATEMENT OF FEDERALLY SPONSORED of, and bimetal leaf has the connection of single-direction transmission by this Moving part is connected on snap close piece, and the drive connection between STATEMENT OF FEDERALLY SPONSORED and snap close piece only has an effect drawing (or pushing away) power Point, therefore STATEMENT OF FEDERALLY SPONSORED and bimetallic free end need to retain sufficiently large activity space, otherwise joined by bimetallism When execution is threaded off and tripped on moving part, so that bimetallism power can not is acted on snap close piece completely, overlond trip can be led to Protective value unstable.Additionally, contact is assembled with supporting lever after needing to be welded with a supporter again, not only manufacturing process is multiple Miscellaneous, reliability is not also high, also significantly occupies space in interiors of products, so that product Miniaturization Design is obstructed.As can be seen here, with Miniaturization Design is the difficult point minimizing again realizing breaker more not to reduce the volume of operating mechanism premised on properties of product One of, because Miniaturization Design must also meet and be easy to extensive, high efficiency, low cost and produce simultaneously, otherwise or can not have Effect strengthens the competitiveness of product in market.

Content of the invention

For solving above-mentioned problems of the prior art, the purpose of this utility model is to provide the behaviour of miniature circuit breaker Make mechanism, amount of parts and manufacturing process can be reduced.As omitted former travel mechanism and excess of stroke spring, can reduce disconnected further The volumetric spaces of road device, further, it is possible to reduce bimetallic lose to the active force of mechanism's snap close piece, improve breaker overload protection Reliability.

A kind of operating mechanism of miniature circuit breaker, including handle 2, drive link 3, is arranged on and can rotate in housing Supporting member 4 and moving contact 5, supporting member 4 and moving contact 5 are pivoted on same common shaft 11, and one end of spring 6 is fixed on base On seat 1, the other end is connected with moving contact 5, and handle 2 drives supporting member 4 to rotate by drive link 3, and supporting member 4 promotes moving contact 5 Rotate, described moving contact 5 can be rotated around same common shaft 11 together with supporting member 4, again can be with respect to supporting member 4 sliding.

Preferably, described moving contact 5 is provided with slip slotted eye 51, and the size of slip slotted eye 51 is more than the chi of common shaft 11 Very little.

Preferably, described supporting member 4 promotes moving contact 5 to contact with static contact 8, spring 6 for the moving contact 5 offer excess of stroke and with The detached active force of static contact 8；Under moving contact 5 with static contact 8 closure state, slip slotted eye 51 on moving contact 5 with public Axle 11 suspends cooperation, and described spring 6 acts on elastic force Fb on moving contact 5 and supporting member 4 acts on the driving force Fa of moving contact 5 And static contact 8 acts on the contact force Fc balance of moving contact 5；Under moving contact 5 with static contact 8 disjunction state, on moving contact 5 Slip slotted eye 51 and common shaft 11 bearing engagement, the elastic force Fb that described spring 6 acts on moving contact 5 is acted on supporting member 4 The driving force Fa of driving head 50 and common shaft 11 act on the supporting force Fd balance of slip slotted eye 51.

Preferably, the tripping part 91 and the snap close piece 92 that are pivoted on supporting member 4 respectively, tripping part 91 and lock are also included Fastener 92 overlap joint cooperation；Described tripping part 91 is connected by drive link 3 with handle 2, and handle 2 passes through drive link 3 and tripping part 91 drive supporting members 4 rotate, and snap close piece 92 is provided with lock tooth 92a, and lock tooth 92a and jump thereon is ordered about in the rotation of snap close piece 92 The buckle teeth 91a engagement being correspondingly arranged on fastener 91 or separation.

Preferably, described supporting member 4 and moving contact 5 stacking are arranged on same common shaft 11, and described supporting member 4 is provided with Raised drive division 40, the end of described moving contact 5 extends the driving head 50 being provided with drive division cooperation, by moving contact 5 Driving head 50 and supporting member 4 on drive division 40 realize between moving contact 5 and supporting member 4 Contact Transmission cooperation.

Preferably, described moving contact 5 is provided with slip slotted eye 51, and one end is provided with movable contact 53, and the other end is provided with and supports The driving head 50 of part 4 cooperation；Moving contact 5 is additionally provided with the spring eye 52 being connected with spring 6, and spring eye 52 is located at the drive of moving contact 5 Dynamic between 50 and slip slotted eye 51, and the slotted eye 51 that slides is located between driving head 50 and movable contact 53.

Preferably, the slip slotted eye 51 on described moving contact 5 includes the circular arc with common shaft 11 bearing engagement and props up Bearing surface 51a and a U-shaped sliding surface 51b being slidably matched with common shaft 11；And, described slip slotted eye 51 is more than for length L The direction that the bearing of trend of the kidney ellipsoid of width H, wherein length L acts on the elastic force Fb on moving contact 5 with spring 6 is parallel.

Preferably, also include the STATEMENT OF FEDERALLY SPONSORED 93 being connected with snap close piece 92, bimetal leaf 7 drives snap close piece by STATEMENT OF FEDERALLY SPONSORED 93 92 rotate the hasp connection releasing snap close piece 92 and tripping part 91；Described STATEMENT OF FEDERALLY SPONSORED 93 acts on snap close piece 92 when driving cooperation Tripping force be two, one of is pulling force M, and another is in thrust N, and, the rotation with respect to snap close piece 92 for the pulling force M The direction of the direction of the moment of the heart 41 moment with respect to the center of rotation 41 of snap close piece 92 with thrust N is identical.

Preferably, described snap close piece 92 be provided with magnetictrip cooperation the first dropout drive division 921 and with connection Second dropout drive division 922 of moving part 93 cooperation and the 3rd dropout drive division 923, the wherein second dropout drive division 922 and linkage The first end 93a chain connection of part 93, the 3rd dropout drive division 923 drives cooperation with the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93.

Preferably, it is pivoted in the middle part of described snap close piece 92 on supporting member 4, one end is provided with and tripping part 91 cooperation Lock tooth 92a, the other end is dropout drive division, and dropout drive division extends to both sides respectively and forms the first dropout drive division 921 and the Three dropout drive divisions 923, the first dropout drive division 921 and the 3rd dropout drive division 923 are located at moving contact 5 both sides, the second dropout Drive division 922 is the hinge hole being arranged on dropout drive division, and is located between moving contact 5 and the 3rd dropout drive division 923；? Elastic reset angle 920 for snap close piece 92 and tripping part 91 overlap joint is additionally provided with described snap close piece 92.

Compared to the prior art, the utility model proposes miniature circuit breaker operating mechanism scheme possess following excellent Point：

1) pass through the structure using moving contact 5 and the cooperation of supporting member 4 Contact Transmission, make the moving contact 5 can be with supporting member 4 one Rise and rotate around same axle, and can make with respect to supporting member 4 sliding, be capable of moving contact 5 needed for the excess of stroke and static contact it Between contact force be can elastic displacement contact force function, the conventional parts such as travel mechanism and excess of stroke spring can omitted In the case of, the closure remaining as moving contact 5 with static contact 8 provides contact and the excess of stroke needed for guarantee electrical contact reliability Elastic force.

2) pass through the structure that coordinated with supporting member 4 Contact Transmission using moving contact 5 and here basic using developing further The concrete structure of operating mechanism and the entirety of the structure of many power drivings improving snap close piece 92 and STATEMENT OF FEDERALLY SPONSORED 93 further set Meter, can effectively simplify the structure of the operating mechanism of breaker, improve the degree of miniaturization of operating mechanism further so that design is made Produce the high operating mechanism of degree of miniaturization to be possibly realized.

3) technical scheme force system in equilibrium reliable and simple and reasonable it is achieved that the equalising torque of moving contact 5 divide-shut brake, real Existing STATEMENT OF FEDERALLY SPONSORED 93 acts on the maximization of the dropout moment of snap close piece 92, improves the stability of overload protection, can effectively optimize The performance of operating mechanism, electric property, job stability and reliability, and it is easily obtained low cost, high efficiency production Economy.

Brief description

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

Fig. 1 is the operating mechanism of the miniature circuit breaker that moving contact 5 of the present utility model is in disjunction state with static contact 8 Integrally-built floor map.

Fig. 2 is the operating mechanism of the miniature circuit breaker that moving contact 5 of the present utility model is in closure state with static contact 8 Integrally-built floor map.

Fig. 3 is the perspective view of the operating mechanism of miniature circuit breaker of the present utility model.

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

Fig. 5 is moving contact 5 and common shaft 11 in the operating mechanism of miniature circuit breaker of the present utility model shown in Fig. 1 Assembly relation and force system in equilibrium structural upright schematic diagram, in figure show the moving contact 5 being in disjunction state, its slip slotted eye 51 are in bearing engagement state with common shaft 11.

Fig. 6 is moving contact 5 and common shaft 11 in the operating mechanism of miniature circuit breaker of the present utility model shown in Fig. 2 Assembly relation and force system in equilibrium structural upright schematic diagram, in figure show the moving contact 5 being in closure state, its slip slotted eye 51 are in suspension mated condition with common shaft 11.

Fig. 7 is supporting member 4 in the operating mechanism of miniature circuit breaker of the present utility model shown in Fig. 1 and moving contact 5, quiet Contact 8 is commonly mounted on the structural representation on common shaft 11, slip slotted eye 51 and the common shaft 11 of the moving contact 5 shown in figure It is in bearing engagement state.

Fig. 8 is supporting member 4 in the operating mechanism of miniature circuit breaker of the present utility model shown in Fig. 2 and moving contact 5, quiet Contact 8 is commonly mounted on the structural representation on common shaft 11, slip slotted eye 51 and the common shaft 11 of the moving contact 5 shown in figure It is in suspension mated condition.

Fig. 9 is the A partial enlarged drawing of Fig. 3, shows the buckle teeth 91a of tripping part 91 and the snap close piece 92 of transmission device 9 Engagement/disengagement fit structure between lock tooth 92a.

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

Figure 11 is the structural representation of the moving contact 5 in the operating mechanism of miniature circuit breaker of the present utility model.

Figure 12 is the structural representation of the STATEMENT OF FEDERALLY SPONSORED 93 in the operating mechanism of miniature circuit breaker of the present utility model.

Specific embodiment

In order to illustrate the technical solution of the utility model and technical purpose, below in conjunction with the accompanying drawings and specific embodiment to this Utility model is described further.

Referring to Fig. 1, Fig. 2, the including pedestal 1 and housing that cap is formed, be arranged on of miniature circuit breaker of the present utility model Operating mechanism in housing and be fixedly mounted on the static contact 8 with stationary contact in pedestal 1；Described operating mechanism includes The handle 2 that is pivoted in the Handle axis 12 of pedestal 1, one end and the hinged drive link 3 of handle 2, it is arranged on pedestal 1 And the supporting member 4 that can rotate and moving contact 5.Wherein：Handle 2 is limited by pedestal 1 and makes it have separating brake settling position (such as Position shown in Fig. 1) and combined floodgate settling position (position as shown in Figure 2), handle 2 is provided with back-moving spring, and breaker also wraps Include that (in figure is not for the thermal trip of overload protection and its bimetal leaf 7, the magnetictrip for short-circuit protection and its push rod Illustrate) etc. circuit breaker components.

One beneficial features of the operating mechanism of miniature circuit breaker of the present utility model are that moving contact 5 adopts slip to suspend Moving contact；Described moving contact 5 and the cooperation of supporting member 4 Contact Transmission, and moving contact 5 can be around same together with supporting member 4 One axle rotates the sliding (i.e. along the movement of the radial direction of its rotary shaft) that again can make with respect to supporting member 4.Can be found in shown in Fig. 5-8 Embodiment：Supporting member 4 and moving contact 5 are pivoted on same common shaft 11, and one end of spring 6 is fixed on pedestal 1, The other end is connected with moving contact 5, and handle 2 drives supporting member 4 to rotate by drive link 3, and supporting member 4 promotes moving contact 5 to rotate, institute State moving contact 5 to rotate around same common shaft 11 together with supporting member 4, again can be with respect to supporting member 4 sliding.Described here " Contact Transmission cooperation " refer to supporting member 4 with can rotate and can sliding movement moving contact 5 transmission cooperation, this transmission joins Close exclusion non-contacting all the time or exist relatively slide as directly driven with the transmission of moving contact from connecting rod.This design feature Not only contribute to the Miniaturization Design of operating mechanism, such as：Excess of stroke spring and travel mechanism can be omitted by the sliding of moving contact 5, And the problems such as impact operation precision of moving contact 5, stationarity, reliability, can effectively be overcome by Contact Transmission cooperation moreover it is possible to Optimize performance, electric property and job stability and the reliability of operating mechanism.Therefore, for the moving contact 5 of slip For structure, seemed particular importance using above-mentioned Contact Transmission fit structure.

Another beneficial features of the present utility model are related to further improved operating mechanism under said structure scheme Concrete structure design, it can have kinds of schemes, and a kind of preferred scheme is as shown in Figure 3,4：Described moving contact 5 is provided with sliding tray Hole 51, 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 public affairs With, on axle 11, described supporting member 4 is provided with the drive division 40 of projection, the end of described moving contact 5 extends to be provided with is joined with drive division The driving head 50 closing, realizes moving contact 5 and supporting member 4 by the driving head 50 on moving contact 5 with the drive division 40 on supporting member 4 Between Contact Transmission cooperation.Described supporting member 4 promotes moving contact 5 to contact with static contact 8 by drive division 40, described spring 6 There is provided the excess of stroke and active force detached with static contact 8 for moving contact 5, spring 6 have for drive moving contact 5 and static contact 8 point Disconnected provide for the energy storage elastic force needed for reset and ensure contact needed for contact electrical contact reliability during closure and The dual-use function of the excess of stroke.Moving contact 5 is specially with the cooperation of supporting member 4 Contact Transmission：In moving contact 5 and static contact 8 closing course In, supporting member 4 is rotated around common shaft 11 by from the driving of the operating physical force of handle 2, and the rotation of supporting member 4 drives drive thereon Dynamic portion 40 rotates, and driving head 50 and drive division 40 are engaged and for the rotation of drive division 40 to pass to driving head 50, make driving head 50 drive moving contacts 5 not only to rotate again the radial direction that work is with respect to common shaft 11 (being also with respect to supporting member 4) (towards public affairs around common shaft 11 Radial direction with axle 11) mobile (sliding)；Under moving contact 5 with static contact 8 closure state, referring to Fig. 6, Fig. 8, slip slotted eye 51 hangs Float on common shaft 11, that is,：Slip slotted eye 51 is suspended with common shaft 11 and coordinates.In moving contact 5 with static contact 8 breaking course, Moving contact 5 is subject to the elastic force effect of spring 6 not only to make the sliding with respect to common shaft 11 (being also with respect to supporting member 4) but also made around public The rotation of axle 11, the action of moving contact 5 drives driving head 50 action thereon, is joined by driving head 50 contact with drive division 40 Close, the action of driving head 50 is passed to drive division 40, drive division 40 drives supporting member 4 to rotate around common shaft 11.Referring to Fig. 5, Fig. 7, under moving contact 5 with static contact 8 disjunction state, slip slotted eye 51 is bearing on common shaft 11, that is,：Slip slotted eye 51 and public affairs With axle 11 bearing engagement.Show from the state to Fig. 7 for the State Transferring of Fig. 8 and be changed into propping up from suspension from the slip of separating brake of closing a floodgate Hold, then show from the state to Fig. 6 for the State Transferring of Fig. 5 and be changed into suspending from supporting from separating brake to the slip closed a floodgate.Above-mentioned Suspend cooperation, refers to that the action of moving contact 5 drives slip slotted eye 51 sliding on common shaft 11, and make common shaft 11 be located at slide The medium position (position as shown in Fig. 6, Fig. 8) of slotted eye 51, under here suspension mated condition, common shaft 11 and slip slotted eye 51 Circular arc bearing-surface 51a (referring to Figure 11) separate so that between moving contact 5 and common shaft 11 release support relation (formed Suspended state).Above-mentioned bearing engagement, refers to that the action of moving contact 5 drives slip slotted eye 51 sliding on common shaft 11, and makes Common shaft 11 is located at one end (position as shown in Figure 5, Figure 7) of slip slotted eye 51, under this bearing engagement state, common shaft 11 Contact with circular arc bearing-surface 51a (referring to Figure 11) of slip slotted eye 51, so that moving contact 5 passes through the circular arc of slip slotted eye 51 Bearing-surface 51a is bearing on common shaft 11.

Another beneficial features of the present utility model are that the structure with regard to moving contact 5 is improved, a kind of preferred moving contact 5 Structure is as shown in figure 11：Described moving contact 5 is provided with slip slotted eye 51, and one end is provided with movable contact 53, and the other end is provided with and supports The driving head 50 of part 4 cooperation；Moving contact 5 is additionally provided with the spring eye 52 being connected with spring 6, and spring eye 52 is located at the drive of moving contact 5 Dynamic between 50 and slip slotted eye 51, and the slotted eye 51 that slides is located between driving head 50 and movable contact 53.Driving head 50 with Drive division 40 in bearing member 4 contacts all the time, and spring eye 52 is used for mounting the other end of multi-function spring 6, and slip slotted eye 51 is installed On common shaft 11, movable contact 53 and static contact 8 close/disjunction cooperation.A kind of shape and structure of preferred slip slotted eye 51 is such as Shown in Figure 11：Slip slotted eye 51 on described moving contact 5 is included by a circular arc bearing-surface 51a and a U-shaped sliding surface 51b, circular arc bearing-surface 51a and common shaft 11 bearing engagement, U-shaped sliding surface 51b and common shaft 11 are slidably matched, i.e. moving contact 5 in slipping, and two longer faces of its U-shaped sliding surface 51b are slidably matched with common shaft 11, to guide moving contact 5 Glide direction；Slip slotted eye 51 is more than the kidney ellipsoid of width H so that moving contact 5 is with sliding in length L direction for length L Stroke；Wherein the bearing of trend of length L and multi-function spring 6 act on the elastic force Fb on moving contact 5 direction almost parallel, To reduce frictional resistance in slipping for the moving contact 5.Slip during closing operation, in the presence of spring 6, on moving contact Slotted eye 51 side is contacted with common shaft 11, and moving contact 5 carries out, with the rotation of handle 2, motion of closing a floodgate, until moving contact 5 and static contact After 8 contacts, the slip slotted eye 51 on moving contact is separated with common shaft 11, and keeps certain distance.

The structure of moving contact 5 of the present utility model and its slip slotted eye 51 improves the knot also including following force system in equilibrium Structure, these structures can have multiple concrete modes, but is extremely closed for the performance optimizing operating mechanism further using preferred mode Important.A kind of force system in equilibrium structure of preferred moving contact 5 is as shown in Figures 1 to 6.In moving contact 5 and static contact 8 closed form Under state (as shown in 2 and Fig. 6), the elastic force Fb that spring 6 acts on moving contact 5 acts on driving with the drive division 40 of supporting member 4 50 driving force Fa and static contact 8 act on the contact force Fc balance of moving contact 5, resist driving force Fa by elastic force Fb and connect The making a concerted effort of touch Fc realize the outer dynamic balance (referring to Fig. 6) on moving contact 5；Obviously, the force system in equilibrium under closure state is by sliding Dynamic slotted eye 51 suspends what cooperation was constituted with common shaft 11, and it is unrelated with the supporting force of common shaft 11, and static contact 8 acts on dynamic touching 5 contact force Fc is elastic contact force, therefore can omit traditional travel mechanism.In moving contact 5 and static contact 8 disjunction state Under (as shown in 1 and Fig. 5), multi-function spring 6 acts on elastic force Fb on moving contact 5 and acts on driving head 50 with drive division 40 Driving force Fa and common shaft 11 act on supporting force Fd balance (referring to Fig. 5) of slip slotted eye 51, resist transmission by elastic force Fb The making a concerted effort of power Fa and supporting force Fd realize the outer dynamic balance on moving contact 5；Obviously, the structure of the force system in equilibrium under disjunction state is It is made up of the bearing engagement of slip slotted eye 51 and common shaft 11, it is without the participation of static contact.The dynamic of existing operating mechanism touches Head generally need to be fully supported in fixing axle, can only rotate around fixing axle it is impossible to make the sliding with respect to fixing axle and suspension, because This this mechanism has to increase travel mechanism, to realize the compensation of the excess of stroke action required with static contact closure to moving contact, And moving contact 5 of the present utility model not only can be bearing on common shaft 11, but also can make with respect to common shaft 11 sliding and Suspend, can achieve the compensation of the excess of stroke action to moving contact 5 with this.Second, the energy-stored spring of existing operating mechanism and the excess of stroke Spring need to adopt two springs, and wherein energy-stored spring must be connected between flap and pedestal, excess of stroke spring must be connected to flap with Between moving contact, not only mechanism is complicated, and volume is big；And spring 6 of the present utility model is with energy storage and the dual work(of the excess of stroke Can, 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 have The space that effect squeeze operation 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, not only mechanism is complicated, and Volume is big；And the utility model adopts a common shaft 11, and supporting member 4 and moving contact 5 are commonly mounted on common shaft 11 Upper Contact Transmission fit structure between (i.e. coaxial installation) and driving head 50 and drive division 40, not only greatly simplifies and finishes Structure, can be effectively compressed the volume of operating mechanism further, and can effectively improve the essence of transmission between moving contact 5 and supporting member 4 Degree, stationarity and reliability, because the action of moving contact 5 includes rotating and sliding, if between moving contact 5 and supporting member 4 Using other cooperations (as the cooperation with sliding, accessible/detached cooperation), then cannot guarantee the kinematic accuracy of moving contact 5, Thus affecting the performance of operating mechanism, the contact performance of dynamic/static contact and breaking capacity.

Another beneficial features of the present utility model are further by the cooperation dropout drive mechanism made of said structure Improving it is therefore intended that optimizing existing capability, increasing the transmission efficiency of tripping force, to meet the trip action after mechanism's miniaturization Sensitivity, stability, reliability requirement, improve the combined floodgate of operating mechanism, separating brake, the performance of trip operation further.Thread off and pass Dynamic structure can have kinds of schemes, and a kind of preferred scheme is as shown in Figure 1 to Figure 3：The operating mechanism of described miniature circuit breaker is also Including the dropout transmission device 9 being arranged on supporting member 4, it include with the hinged tripping in the second end part 91 of drive link 3, Snap close piece 92 and the STATEMENT OF FEDERALLY SPONSORED 93 with bimetal leaf 7 cooperation, wherein tripping part 91 and snap close piece 92 is pivoted on supporting respectively On part 4, tripping part 91 and snap close piece 92 overlap joint coordinate；Described tripping part 91 is connected by drive link 3 with handle 2, and handle 2 leads to Cross drive link 3 and tripping part 91 drives supporting member 4 to rotate, snap close piece 92 is provided with lock tooth 92a, the rotation of snap close piece 92 is ordered about Lock tooth 92a thereon is engaged with the buckle teeth 91a being correspondingly arranged on tripping part 91 or separates.When short-circuit, magnetictrip can drive lock Fastener 92 rotates makes snap close piece 92 unlock with tripping part 91, and during overload, bimetal leaf 7 drives 92 turns of snap close piece by STATEMENT OF FEDERALLY SPONSORED 93 Dynamic unblock, particularly, the tripping force that described STATEMENT OF FEDERALLY SPONSORED 93 acts on snap close piece 92 when driving cooperation is two.Described lock It is pivoted in the middle part of part 92 on supporting member 4, one end is provided with lock tooth 92a, and the other end is dropout drive division, on dropout drive division It is provided with and the first dropout drive division 921 of magnetictrip cooperation and the second dropout drive division 922 with STATEMENT OF FEDERALLY SPONSORED 93 cooperation With the 3rd dropout drive division 923, the first end 93a chain connection of the wherein second dropout drive division 922 and STATEMENT OF FEDERALLY SPONSORED 93, the 3rd takes off Button drive division 923 drives cooperation with the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93.Wherein, dropout drive division extends formation the to both sides respectively One dropout drive division 921 and the 3rd dropout drive division 923, the first dropout drive division 921 and the 3rd dropout drive division 923 are located at dynamic Contact 5 both sides, the second dropout drive division 922 is the hinge hole being arranged on dropout drive division, and it is de- to be located at moving contact 5 and the 3rd Between button 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 with buckle teeth 91a engagement, snap close piece 92 and tripping part 91 all can not make freely turning with respect to supporting member 4 Dynamic, so that mechanism is in the lock state.Under lock tooth 92a with buckle teeth 91a released state, snap close piece 92 all can be made with tripping part 91 Freely rotatable with respect to supporting member 4, make operating mechanism be in released state.First end and handle 2 hinge due to drive link 3 Connection, the second end of drive link 3 and tripping part 91 chain connection, so：In the locked state, the rotation of handle 2 can be by passing Lever 3 drive supporting member 4 rotate around common shaft 11, with realize operating mechanism switch closing and switch opening operate, handle 2 by pedestal 1 Pedestal 1 under the combined floodgate settling position and separating brake settling position that limit can be with the elastic force of spring 6 for the reaction force of handle 2 Balance, so that operating mechanism is stablized in "on" position or gate-dividing state；In the unlocked state, because tripping part 91 can freely turn Dynamic, therefore pedestal 1 acts on the reaction force of handle 2 and is unable to the elastic force of balancing spring 6, then makes operating mechanism automatically execute jump Lock.

The bimetal leaf of the thermal trip of the overload protection of existing operating mechanism, sets up transmission by pull bar and lock and closes System, the hot trip action of bimetal leaf pulls pull bar, and pull bar pulls lock (i.e. single pulling force driving) again, itself the disadvantage is that, When pull bar pulls the direction of pull of lock to deviate the tangential direction that lock rotates, the moment that pull bar acts on lock occurs damage Consumption, the degree of loss and the size positive correlation deviateing, and mechanism's miniaturization would generally be related to aggravate the problem of described deviation, As reduce related components volume, compression parts between spacing, the aggravation of deviation all occurs unavoidably.To this problem, Referring to Figure 10, the dropout between the STATEMENT OF FEDERALLY SPONSORED 93 of dropout transmission device 9 of many power drivings of the present utility model and snap close piece 92 is driven Power not only includes pulling force M, but also includes thrust N, drives to compensate by described with many power with pulling force M and thrust N Deviate the moment causing to be lost it is achieved that STATEMENT OF FEDERALLY SPONSORED 93 acts on the maximization of the dropout moment of snap close piece 92.Specifically, such as Shown in Figure 10, the tripping force that described STATEMENT OF FEDERALLY SPONSORED 93 acts on snap close piece 92 when driving cooperation is two, and one of is to draw Power M, another is thrust N, and pulling force M is with respect to the direction of the moment (pulling force M × arm of force Am) of the center of rotation 41 of snap close piece 92 With thrust N identical with respect to the direction of the moment (pulling force N × arm of force Am) of the center of rotation 41 of snap close piece 92, i.e. STATEMENT OF FEDERALLY SPONSORED 93 The pulling force M that first end 93a acts on the second dropout drive division 922 orders about the direction of snap close piece 92 rotation and the driving of STATEMENT OF FEDERALLY SPONSORED 93 Bar 93b act on the 3rd dropout drive division 923 thrust N order about snap close piece 92 rotation direction identical.As shown in Figure 10, in connection When moving part 93 drives cooperation with bimetal leaf 7, the angle a between the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 and bimetal leaf 7 is more than 90 °, So that the movable end of bimetal leaf 7 is when swinging towards the dropout direction of R, by the of movable end and the STATEMENT OF FEDERALLY SPONSORED 93 of bimetal leaf 7 The second end 93c that STATEMENT OF FEDERALLY SPONSORED 93 is ordered about in cooperation that drives of two end 93c shifts up, and this shifts up the driving making STATEMENT OF FEDERALLY SPONSORED 93 Bar 93b forms thrust N upwards, so that thrust N remains and identical with pulling force M direction.In short, it is of the present utility model many It is to be achieved in that by following structure that power drives：Second dropout drive division 922 and the first end 93a chain connection of STATEMENT OF FEDERALLY SPONSORED 93 For realizing the structure that STATEMENT OF FEDERALLY SPONSORED 93 drives to the pulling force of snap close piece 92；3rd dropout drive division 923 and the drive of STATEMENT OF FEDERALLY SPONSORED 93 Lever 93b drives the structure for realizing the thrust driving to snap close piece 92 for the STATEMENT OF FEDERALLY SPONSORED 93 of cooperation.Driving described herein is joined Conjunction refers to can contact/detached cooperation, that is,：(the i.e. mistake of overlond trip action during STATEMENT OF FEDERALLY SPONSORED 93 drives snap close piece 92 In journey), the drive rod 93b of STATEMENT OF FEDERALLY SPONSORED 93 is contacted with the 3rd dropout drive division 923 of snap close piece 92；And in other conditions, connection The drive rod 93b of moving part 93 can be detached with the 3rd dropout drive division 923 of snap close piece 92.Additionally, the utility model is adopted (pivoted with the structure of above-mentioned lock tooth 92a and buckle teeth 91a engagement/disengagement, tripping part 91 and snap close piece 92 are pivotally mounted respectively Supporting) structure on common shaft 11 in the structure on supporting member 4 and supporting member 4 pivotally mounted (pivotally supporting), it is also Have advantageous effect in that so that drive link 3- tripping part 91- snap close piece 92- supporting member 4- drive division 40- driving head 50- moves There is not the mobile link of impact transmission accuracy in the driving-chain of contact 5, therefore can effectively guarantee drive link 3 and moving contact 5 Between transmission accuracy, transmission stability and reliable transmission, this, for moving contact 5 structure of slip, is especially to weigh The premium properties wanted.

Another beneficial features of the present utility model are the improvement further of the concrete structure with regard to dropout transmission device 9, These improved preferred versions include following items.For example, as shown in figure 12, the STATEMENT OF FEDERALLY SPONSORED 93 of described dropout transmission device 9 It is sequentially connected and is bent to concave shape by its first end 93a, drive rod 93b, the second end 93c, and first end 93a, drive rod 93b, the second end 93c respectively have the position of separate transmission matching relationship, i.e. first end 93a, drive rod 93b, the second end 93c A position transmission cooperation directly and on snap close piece 92 or bimetal leaf 7 respectively, specially：Its first end 93a and snap close piece The second dropout drive division 922 chain connection on 92, its second end 93c and the bimetal leaf 7 of operating mechanism thermal release device Movable end transmission cooperation, drive rod 93b is coordinated with the 3rd dropout drive division 923 transmission on snap close piece 92.For another example, as Fig. 4 institute Show, the described snap close piece 92 of dropout transmission device 9 is additionally provided with elastic reset angle 920, for realizing the lock shown in Fig. 9 The lock tooth 92a of part 92 and engaging of buckle teeth 91a.Elastic reset angle 920 and snap close piece 92 can integrated injection molding, excellent to obtain Manufacturability and the economy that almost need not increase cost.The antenniform of the termination curve at elastic reset angle 920, it with supporting Part 4 or pedestal 1 are slidably matched, in mechanism's releasing process：Tripping force drives snap close piece 92 to rotate to drive lock tooth 92a and elasticity The movement at reset angle 920 is so that while lock tooth 92a is separated with the buckle teeth 91a on tripping part 91, supporting member 4 or pedestal 1 slide Cooperation makes elastic reset angle 920 elastic deformation with energy storage；Once revocation tripping force, then elastic reset angle 920 releasability is simultaneously Recover elastic deformation, this recoverable force can drive snap close piece 92 to turn round, engage until lock tooth 92a is resetted with buckle teeth 91a.Elasticity The structure at reset angle 920 not only small volume, and elastic force is soft, can compress and bend it is adaptable to compress simultaneously and slide Cooperation, can be effectively improved the homing action characteristic of snap close piece 92.

Further illustrate the operation of the operating mechanism of miniature circuit breaker of the present utility model with reference to Fig. 1 to Figure 12 Journey.

Making process：Moving contact 5 shown in i.e. from Fig. 1 and the state of static contact 8 disjunction, are converted to Fig. 2 through manual operation The state that shown moving contact 5 is closed with static contact 8.Under disjunction state shown in Fig. 1, lock tooth 92a is engaged with buckle teeth 91a, Slip slotted eye 51 and common shaft 11 bearing engagement, that is, circular arc bearing-surface 51a be in the contact shape shown in Fig. 5 with common shaft 11 State；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 Dynamic, the mobile promotion tripping part 91 of drive link 3 and be locked snap close piece 92 together together with supporting member 4 around common shaft 11 Rotate clockwise, the Contact Transmission cooperation of drive division 40 and driving head 50 is passed through in the rotation of supporting member 4, drives moving contact 5 rotate clockwise around common shaft 11, until the movable contact 53 of moving contact 5 contacts closure with static contact 8；Then supporting member 4 are rotated further, and continue through drive division 40 and the cooperation of driving head 50 Contact Transmission, drive moving contact 5 to the right (shown in Fig. 6 The direction of Fa) sliding, until circular arc bearing-surface 51a is separated with common shaft 11 and is converted to the suspension cooperation shown in Fig. 6, 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：Moving contact 5 shown in i.e. from Fig. 2 and the state of static contact 8 closure, are converted to Fig. 1 through manual operation Shown moving contact 5 and the state of static contact 8 disjunction.In the closed condition shown in figure 2, lock tooth 92a is engaged with buckle teeth 91a, Slip slotted eye 51 is suspended with common shaft 11 and coordinates, and that is, circular arc bearing-surface 51a is in shown in Fig. 6 with common shaft 11 and separates shape State；When manual operation handle 2 orders about it and rotates counterclockwise, the drive link 3 that handle 2 promotion is connected with its eccentric hinge Mobile, the mobile promotion tripping part 91 of drive link 3 and be locked snap close piece 92 together together with supporting member 4 around common shaft 11 rotate counterclockwise, and the Contact Transmission cooperation of drive division 40 and driving head 50 and spring 6 are passed through in the rotation of supporting member 4 Elastic force acts on, and orders about moving contact 5 (direction of the Fb shown in Fig. 6) sliding to the left, until circular arc bearing-surface 51a and common shaft 11 Contact, that is, be converted to the bearing engagement state shown in Fig. 5；Then supporting member 4 is rotated further, and continues through drive division 40 and drive Dynamic 50 Contact Transmission cooperations, make moving contact 5 rotate counterclockwise around common shaft 11, the movable contact 53 of moving contact 5 with quiet Contact 8 is initially separated, and gets over back its flex point until the position of drive link 3, movable contact 53 and static contact 8 are kept completely separate, handle 2 and machine Structure is transformed into the separating brake settling position shown in Fig. 1.

Tripping operation process：Moving contact 5 shown in i.e. from Fig. 2 is converted to Fig. 1 institute with the state of static contact 8 closure through automatic trip The moving contact 5 showing and the state of static contact 8 disjunction.In the closed condition shown in figure 2, lock tooth 92a is engaged with buckle teeth 91a, sliding Dynamic slotted eye 51 is suspended with common shaft 11 and coordinates, and that is, circular arc bearing-surface 51a and common shaft 11 are in the released state shown in Fig. 6； When overload and short trouble, the bimetal leaf 7 of magnetictrip (not shown) or thermal trip orders about snap close piece 92 rotate around it center 41 rotates that (magnetictrip promotes to the right first on snap close piece 92 by its push rod counterclockwise Dropout drive division 921；Or bimetal leaf 7 movable end pulls STATEMENT OF FEDERALLY SPONSORED 93 to upper right side), the rotation of snap close piece 92 drives thereon Lock tooth 92a separate with buckle teeth 91a, so that mechanism is unlocked so that drive link 3 is connected through the hinge acts on the power of tripping part 91 not Spring 6 can be resisted the bullet being delivered on supporting member 4 is coordinated with the Contact Transmission of driving head 50 by moving contact 5 and drive division 40 Power, then makes supporting member 4 and connected tripping part 91 together, snap close piece 92, STATEMENT OF FEDERALLY SPONSORED 93, drive link 3 around common shaft 11 rotate counterclockwise, and the Contact Transmission cooperation of drive division 40 and driving head 50 and spring 6 are passed through in the rotation of supporting member 4 Elastic force acts on, and orders about moving contact 5 (direction of the Fb shown in Fig. 6) sliding to the left, until circular arc bearing-surface 51a and common shaft 11 Contact, that is, be converted to the bearing engagement state shown in Fig. 5；Then, under the elastic force of spring 6 acts on, supporting member 4 is rotated further simultaneously Continue through the Contact Transmission cooperation of drive division 40 and driving head 50, so that moving contact 5 is rotated counterclockwise around common shaft 11, The movable contact 53 of moving contact 5 and static contact 8 are initially separated, until flex point, movable contact 53 and static contact are crossed in the position of drive link 3 8 complete disjunctions, lock 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 be with reference to specific preferred embodiment further detailed description of the utility model it is impossible to Identification is of the present utility model to be embodied as being confined to these explanations.Ordinary skill for the utility model art For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should regard For belonging to protection domain of the present utility model.

Claims (10)

1. a kind of operating mechanism of miniature circuit breaker, including handle (2), drive link (3), is arranged in housing and can rotate Supporting member (4) and moving contact (5) it is characterised in that：Supporting member (4) and moving contact (5) are pivoted on same common shaft (11) on, one end of spring (6) is fixed on pedestal (1), and the other end is connected with moving contact (5), and handle (2) passes through drive link (3) supporting member (4) is driven to rotate, supporting member (4) promotes moving contact (5) to rotate, and described moving contact (5) can be with supporting member (4) Rotate around same common shaft (11) together, again can be with respect to supporting member (4) sliding.

2. miniature circuit breaker according to claim 1 operating mechanism it is characterised in that：Described moving contact (5) is provided with Slip slotted eye (51), the size of slip slotted eye (51) is more than the size of common shaft (11).

3. miniature circuit breaker according to claim 1 and 2 operating mechanism it is characterised in that：Described supporting member (4) promotes Moving contact (5) is contacted with static contact (8), and spring (6) is that moving contact (5) provides the excess of stroke and active force detached with static contact (8)； Under moving contact (5) with static contact (8) closure state, the slip slotted eye (51) on moving contact (5) is suspended with common shaft (11) and joins Close, described spring (6) act on elastic force Fb on moving contact (5) and supporting member (4) act on moving contact (5) driving force Fa and Static contact (8) acts on the contact force Fc balance of moving contact (5)；Under moving contact (5) with static contact (8) disjunction state, move and touch Slip slotted eye (51) on head (5) and common shaft (11) bearing engagement, described spring (6) acts on the elastic force on moving contact (5) Fb and supporting member (4) act on the driving force Fa of driving head (50) and common shaft (11) acts on the supporting force of slip slotted eye (51) Fd balances.

4. miniature circuit breaker according to claim 1 operating mechanism it is characterised in that：Also include being pivoted on respectively Tripping part (91) on supporting member (4) and snap close piece (92), tripping part (91) and snap close piece (92) overlap joint cooperation；Described tripping part (91) it is connected by drive link (3) with handle (2), handle (2) passes through drive link (3) and tripping part (91) drives supporting member (4) rotate, snap close piece (92) is provided with lock tooth (92a), lock tooth (92a) and tripping thereon is ordered about in the rotation of snap close piece (92) Buckle teeth (91a) engagement being correspondingly arranged on part (91) or separation.

5. miniature circuit breaker according to claim 1 operating mechanism it is characterised in that：Described supporting member (4) and dynamic touch Head (5) stacking is arranged on same common shaft (11), and described supporting member (4) is provided with the drive division (40) of projection, described dynamic tactile The end of head (5) extends the driving head (50) being provided with drive division cooperation, by the driving head (50) on moving contact (5) and supporting Drive division (40) on part (4) realizes the Contact Transmission cooperation between moving contact (5) and supporting member (4).

6. miniature circuit breaker according to claim 1 operating mechanism it is characterised in that：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) coordinating with supporting member (4)；Moving contact (5) it is additionally provided with the spring eye (52) being connected with spring (6), spring eye (52) is located at driving head (50) and the slip of moving contact (5) Between slotted eye (51), and the slotted eye that slides (51) is located between driving head (50) and movable contact (53).

7. the miniature circuit breaker according to claim 2 or 6 operating mechanism it is characterised in that：On described moving contact (5) Slip slotted eye (51) includes a circular arc bearing-surface (51a) with common shaft (11) bearing engagement and one and common shaft (11) The U-shaped sliding surface (51b) being slidably matched；And, described slip slotted eye (51) is more than the kidney ellipsoid of width H for length L, wherein long The direction that the bearing of trend of degree L acts on the elastic force Fb on moving contact (5) with spring (6) is parallel.

8. miniature circuit breaker according to claim 4 operating mechanism it is characterised in that：Also include with snap close piece (92) even The STATEMENT OF FEDERALLY SPONSORED (93) connecing, bimetal leaf (7) drives snap close piece (92) to rotate by STATEMENT OF FEDERALLY SPONSORED (93) and releases snap close piece (92) and jump The hasp connection of fastener (91)；The tripping force that described STATEMENT OF FEDERALLY SPONSORED (93) acts on snap close piece (92) when driving cooperation is two, One of is pulling force M, and another is thrust N, and, pulling force M is with respect to the moment of the center of rotation (41) of snap close piece (92) Direction moment with respect to the center of rotation (41) of snap close piece (92) with thrust N direction identical.

9. miniature circuit breaker according to claim 8 operating mechanism it is characterised in that：Described snap close piece (92) is provided with The the second dropout drive division coordinate with the first dropout drive division (921) of magnetictrip cooperation and with STATEMENT OF FEDERALLY SPONSORED (93) (922) and the 3rd dropout drive division (923), first end (93a) hinge of the wherein second dropout drive division (922) and STATEMENT OF FEDERALLY SPONSORED (93) Chain connects, and the 3rd dropout drive division (923) drives cooperation with the drive rod (93b) of STATEMENT OF FEDERALLY SPONSORED (93).

10. miniature circuit breaker according to claim 9 operating mechanism it is characterised in that：In described snap close piece (92) Portion is pivoted on supporting member (4), and one end is provided with the lock tooth (92a) coordinating with tripping part (91), and the other end is to thread off to drive Portion, dropout drive division extends to both sides respectively and forms the first dropout drive division (921) and the 3rd dropout drive division (923), and first Dropout drive division (921) and the 3rd dropout drive division (923) are located at moving contact (5) both sides, and the second dropout drive division (922) is to set Put the hinge hole on dropout drive division, and be located between moving contact (5) and the 3rd dropout drive division (923)；In described lock The elastic reset angle (920) overlapping for snap close piece (92) and tripping part (91) is additionally provided with part (92).